From 0e4c013b6743507ebce2c08991cf1e3ab49cf7ac Mon Sep 17 00:00:00 2001 From: Richard Musiol Date: Tue, 25 Sep 2018 13:45:08 +0200 Subject: [PATCH 001/240] syscall: use asynchronous operations on js/wasm This commit makes syscall on js/wasm use the asynchronous variants of functions in Node.js' fs module. This enables concurrency and allows the API of the fs module to be implemented with an alternative backend that only supports asynchronous operations. Updates #26051. Change-Id: Ibe1dcc988469fc11c3b8d8d49de439c12ddaafce Reviewed-on: https://go-review.googlesource.com/c/137236 TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/syscall/fs_js.go | 94 ++++++++++++++++++++++++++++---------------- 1 file changed, 60 insertions(+), 34 deletions(-) diff --git a/src/syscall/fs_js.go b/src/syscall/fs_js.go index 00d6c76979..22a055a040 100644 --- a/src/syscall/fs_js.go +++ b/src/syscall/fs_js.go @@ -81,15 +81,15 @@ func Open(path string, openmode int, perm uint32) (int, error) { return 0, errors.New("syscall.Open: O_SYNC is not supported by js/wasm") } - jsFD, err := fsCall("openSync", path, flags, perm) + jsFD, err := fsCall("open", path, flags, perm) if err != nil { return 0, err } fd := jsFD.Int() var entries []string - if stat, err := fsCall("fstatSync", fd); err == nil && stat.Call("isDirectory").Bool() { - dir, err := fsCall("readdirSync", path) + if stat, err := fsCall("fstat", fd); err == nil && stat.Call("isDirectory").Bool() { + dir, err := fsCall("readdir", path) if err != nil { return 0, err } @@ -113,7 +113,7 @@ func Close(fd int) error { filesMu.Lock() delete(files, fd) filesMu.Unlock() - _, err := fsCall("closeSync", fd) + _, err := fsCall("close", fd) return err } @@ -125,7 +125,7 @@ func Mkdir(path string, perm uint32) error { if err := checkPath(path); err != nil { return err } - _, err := fsCall("mkdirSync", path, perm) + _, err := fsCall("mkdir", path, perm) return err } @@ -182,7 +182,7 @@ func Stat(path string, st *Stat_t) error { if err := checkPath(path); err != nil { return err } - jsSt, err := fsCall("statSync", path) + jsSt, err := fsCall("stat", path) if err != nil { return err } @@ -194,7 +194,7 @@ func Lstat(path string, st *Stat_t) error { if err := checkPath(path); err != nil { return err } - jsSt, err := fsCall("lstatSync", path) + jsSt, err := fsCall("lstat", path) if err != nil { return err } @@ -203,7 +203,7 @@ func Lstat(path string, st *Stat_t) error { } func Fstat(fd int, st *Stat_t) error { - jsSt, err := fsCall("fstatSync", fd) + jsSt, err := fsCall("fstat", fd) if err != nil { return err } @@ -215,7 +215,7 @@ func Unlink(path string) error { if err := checkPath(path); err != nil { return err } - _, err := fsCall("unlinkSync", path) + _, err := fsCall("unlink", path) return err } @@ -223,7 +223,7 @@ func Rmdir(path string) error { if err := checkPath(path); err != nil { return err } - _, err := fsCall("rmdirSync", path) + _, err := fsCall("rmdir", path) return err } @@ -231,12 +231,12 @@ func Chmod(path string, mode uint32) error { if err := checkPath(path); err != nil { return err } - _, err := fsCall("chmodSync", path, mode) + _, err := fsCall("chmod", path, mode) return err } func Fchmod(fd int, mode uint32) error { - _, err := fsCall("fchmodSync", fd, mode) + _, err := fsCall("fchmod", fd, mode) return err } @@ -267,7 +267,7 @@ func UtimesNano(path string, ts []Timespec) error { } atime := ts[0].Sec mtime := ts[1].Sec - _, err := fsCall("utimesSync", path, atime, mtime) + _, err := fsCall("utimes", path, atime, mtime) return err } @@ -278,7 +278,7 @@ func Rename(from, to string) error { if err := checkPath(to); err != nil { return err } - _, err := fsCall("renameSync", from, to) + _, err := fsCall("rename", from, to) return err } @@ -286,12 +286,12 @@ func Truncate(path string, length int64) error { if err := checkPath(path); err != nil { return err } - _, err := fsCall("truncateSync", path, length) + _, err := fsCall("truncate", path, length) return err } func Ftruncate(fd int, length int64) error { - _, err := fsCall("ftruncateSync", fd, length) + _, err := fsCall("ftruncate", fd, length) return err } @@ -299,7 +299,7 @@ func Getcwd(buf []byte) (n int, err error) { defer recoverErr(&err) cwd := jsProcess.Call("cwd").String() n = copy(buf, cwd) - return n, nil + return } func Chdir(path string) (err error) { @@ -323,7 +323,7 @@ func Readlink(path string, buf []byte) (n int, err error) { if err := checkPath(path); err != nil { return 0, err } - dst, err := fsCall("readlinkSync", path) + dst, err := fsCall("readlink", path) if err != nil { return 0, err } @@ -338,7 +338,7 @@ func Link(path, link string) error { if err := checkPath(link); err != nil { return err } - _, err := fsCall("linkSync", path, link) + _, err := fsCall("link", path, link) return err } @@ -349,12 +349,12 @@ func Symlink(path, link string) error { if err := checkPath(link); err != nil { return err } - _, err := fsCall("symlinkSync", path, link) + _, err := fsCall("symlink", path, link) return err } func Fsync(fd int) error { - _, err := fsCall("fsyncSync", fd) + _, err := fsCall("fsync", fd) return err } @@ -371,7 +371,7 @@ func Read(fd int, b []byte) (int, error) { } a := js.TypedArrayOf(b) - n, err := fsCall("readSync", fd, a, 0, len(b)) + n, err := fsCall("read", fd, a, 0, len(b), nil) a.Release() if err != nil { return 0, err @@ -394,7 +394,7 @@ func Write(fd int, b []byte) (int, error) { } a := js.TypedArrayOf(b) - n, err := fsCall("writeSync", fd, a, 0, len(b)) + n, err := fsCall("write", fd, a, 0, len(b), nil) a.Release() if err != nil { return 0, err @@ -406,7 +406,7 @@ func Write(fd int, b []byte) (int, error) { func Pread(fd int, b []byte, offset int64) (int, error) { a := js.TypedArrayOf(b) - n, err := fsCall("readSync", fd, a, 0, len(b), offset) + n, err := fsCall("read", fd, a, 0, len(b), offset) a.Release() if err != nil { return 0, err @@ -416,7 +416,7 @@ func Pread(fd int, b []byte, offset int64) (int, error) { func Pwrite(fd int, b []byte, offset int64) (int, error) { a := js.TypedArrayOf(b) - n, err := fsCall("writeSync", fd, a, 0, len(b), offset) + n, err := fsCall("write", fd, a, 0, len(b), offset) a.Release() if err != nil { return 0, err @@ -467,10 +467,31 @@ func Pipe(fd []int) error { return ENOSYS } -func fsCall(name string, args ...interface{}) (res js.Value, err error) { - defer recoverErr(&err) - res = jsFS.Call(name, args...) - return +func fsCall(name string, args ...interface{}) (js.Value, error) { + type callResult struct { + val js.Value + err error + } + + c := make(chan callResult) + jsFS.Call(name, append(args, js.NewCallback(func(args []js.Value) { + var res callResult + + if len(args) >= 1 { // on Node.js 8, fs.utimes calls the callback without any arguments + if jsErr := args[0]; jsErr != js.Null() { + res.err = mapJSError(jsErr) + } + } + + res.val = js.Undefined() + if len(args) >= 2 { + res.val = args[1] + } + + c <- res + }))...) + res := <-c + return res.val, res.err } // checkPath checks that the path is not empty and that it contains no null characters. @@ -492,10 +513,15 @@ func recoverErr(errPtr *error) { if !ok { panic(err) } - errno, ok := errnoByCode[jsErr.Get("code").String()] - if !ok { - panic(err) - } - *errPtr = errnoErr(Errno(errno)) + *errPtr = mapJSError(jsErr.Value) } } + +// mapJSError maps an error given by Node.js to the appropriate Go error +func mapJSError(jsErr js.Value) error { + errno, ok := errnoByCode[jsErr.Get("code").String()] + if !ok { + panic(jsErr) + } + return errnoErr(Errno(errno)) +} From f1973f3164e5b570b8601c18fa484be7e97171f4 Mon Sep 17 00:00:00 2001 From: uropek Date: Wed, 3 Oct 2018 23:52:49 +0000 Subject: [PATCH 002/240] test: fix spelling of `caught be the compiler` to `caught by the compiler` Change-Id: Id21cdce35963dcdb96cc06252170590224c5aa17 GitHub-Last-Rev: 429dad0ceba123415af308179d0d2aa9773e6323 GitHub-Pull-Request: golang/go#28000 Reviewed-on: https://go-review.googlesource.com/c/139424 Reviewed-by: Ian Lance Taylor --- test/typeswitch2.go | 2 +- test/typeswitch3.go | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/test/typeswitch2.go b/test/typeswitch2.go index 1160b62e14..5958b7db8e 100644 --- a/test/typeswitch2.go +++ b/test/typeswitch2.go @@ -4,7 +4,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// Verify that various erroneous type switches are caught be the compiler. +// Verify that various erroneous type switches are caught by the compiler. // Does not compile. package main diff --git a/test/typeswitch3.go b/test/typeswitch3.go index 58d4cba2d0..1388187566 100644 --- a/test/typeswitch3.go +++ b/test/typeswitch3.go @@ -4,7 +4,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// Verify that erroneous type switches are caught be the compiler. +// Verify that erroneous type switches are caught by the compiler. // Issue 2700, among other things. // Does not compile. From c6483b61a9096e3076439079c88eab84c9e6d859 Mon Sep 17 00:00:00 2001 From: Michael Fraenkel Date: Wed, 3 Oct 2018 20:42:05 -0400 Subject: [PATCH 003/240] expvar: add Map.Delete Fixes #13491 Change-Id: Ic0525d8ee90f47d0d23c1485919aee13d2400494 Reviewed-on: https://go-review.googlesource.com/c/139537 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/expvar/expvar.go | 13 ++++++++++++- src/expvar/expvar_test.go | 37 +++++++++++++++++++++++++++++++++++++ 2 files changed, 49 insertions(+), 1 deletion(-) diff --git a/src/expvar/expvar.go b/src/expvar/expvar.go index b7928aab17..976b300d63 100644 --- a/src/expvar/expvar.go +++ b/src/expvar/expvar.go @@ -137,7 +137,7 @@ func (v *Map) Init() *Map { return v } -// updateKeys updates the sorted list of keys in v.keys. +// addKey updates the sorted list of keys in v.keys. func (v *Map) addKey(key string) { v.keysMu.Lock() defer v.keysMu.Unlock() @@ -199,6 +199,17 @@ func (v *Map) AddFloat(key string, delta float64) { } } +// Deletes the given key from the map. +func (v *Map) Delete(key string) { + v.keysMu.Lock() + defer v.keysMu.Unlock() + i := sort.SearchStrings(v.keys, key) + if i < len(v.keys) && key == v.keys[i] { + v.keys = append(v.keys[:i], v.keys[i+1:]...) + v.m.Delete(key) + } +} + // Do calls f for each entry in the map. // The map is locked during the iteration, // but existing entries may be concurrently updated. diff --git a/src/expvar/expvar_test.go b/src/expvar/expvar_test.go index 728e763896..804b56c1aa 100644 --- a/src/expvar/expvar_test.go +++ b/src/expvar/expvar_test.go @@ -183,6 +183,43 @@ func TestMapInit(t *testing.T) { } } +func TestMapDelete(t *testing.T) { + RemoveAll() + colors := NewMap("bike-shed-colors") + + colors.Add("red", 1) + colors.Add("red", 2) + colors.Add("blue", 4) + + n := 0 + colors.Do(func(KeyValue) { n++ }) + if n != 2 { + t.Errorf("after two Add calls with distinct keys, Do should invoke f 2 times; got %v", n) + } + + colors.Delete("red") + n = 0 + colors.Do(func(KeyValue) { n++ }) + if n != 1 { + t.Errorf("removed red, Do should invoke f 1 times; got %v", n) + } + + colors.Delete("notfound") + n = 0 + colors.Do(func(KeyValue) { n++ }) + if n != 1 { + t.Errorf("attempted to remove notfound, Do should invoke f 1 times; got %v", n) + } + + colors.Delete("blue") + colors.Delete("blue") + n = 0 + colors.Do(func(KeyValue) { n++ }) + if n != 0 { + t.Errorf("all keys removed, Do should invoke f 0 times; got %v", n) + } +} + func TestMapCounter(t *testing.T) { RemoveAll() colors := NewMap("bike-shed-colors") From 2f1ef6be000fdf4ab74cb306e448c9e0e49bf148 Mon Sep 17 00:00:00 2001 From: Kir Kolyshkin Date: Wed, 3 Oct 2018 18:41:18 -0700 Subject: [PATCH 004/240] crypto/x509: fix getting user home dir on darwin As pointed out in https://github.com/golang/go/issues/26463, HOME (or equivalent) environment variable (rather than the value obtained by parsing /etc/passwd or the like) should be used to obtain user's home directory. Since commit fa1a49aa556d8 there's a method to obtain user's home directory -- use it here. Change-Id: I852fbb24249bcfe08f3874fae6e7b9d01d869190 Reviewed-on: https://go-review.googlesource.com/c/139426 Reviewed-by: Brad Fitzpatrick Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- src/crypto/x509/root_darwin.go | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/src/crypto/x509/root_darwin.go b/src/crypto/x509/root_darwin.go index 9d7b3a6ffb..ae69a2fadd 100644 --- a/src/crypto/x509/root_darwin.go +++ b/src/crypto/x509/root_darwin.go @@ -16,7 +16,6 @@ import ( "io/ioutil" "os" "os/exec" - "os/user" "path/filepath" "strings" "sync" @@ -67,17 +66,17 @@ func execSecurityRoots() (*CertPool, error) { "/Library/Keychains/System.keychain", } - u, err := user.Current() - if err != nil { + home := os.UserHomeDir() + if home == "" { if debugExecDarwinRoots { - println(fmt.Sprintf("crypto/x509: get current user: %v", err)) + println("crypto/x509: can't get user home directory") } } else { args = append(args, - filepath.Join(u.HomeDir, "/Library/Keychains/login.keychain"), + filepath.Join(home, "/Library/Keychains/login.keychain"), // Fresh installs of Sierra use a slightly different path for the login keychain - filepath.Join(u.HomeDir, "/Library/Keychains/login.keychain-db"), + filepath.Join(home, "/Library/Keychains/login.keychain-db"), ) } From 5e8beed149c77ee8f0bc4eee6a97faa4cec23027 Mon Sep 17 00:00:00 2001 From: Matthew Dempsky Date: Mon, 6 Nov 2017 14:41:06 -0800 Subject: [PATCH 005/240] cmd/compile: remove pointer arithmetic Change-Id: Ie4bab0b74d5a4e1aecd8501a48176b2e9a3d8c42 Reviewed-on: https://go-review.googlesource.com/c/76311 Run-TryBot: Matthew Dempsky Reviewed-by: Robert Griesemer --- src/cmd/compile/internal/gc/range.go | 23 ++++++++++++++++------- src/cmd/compile/internal/gc/ssa.go | 2 -- 2 files changed, 16 insertions(+), 9 deletions(-) diff --git a/src/cmd/compile/internal/gc/range.go b/src/cmd/compile/internal/gc/range.go index 13f45e164d..ac03cc5ea7 100644 --- a/src/cmd/compile/internal/gc/range.go +++ b/src/cmd/compile/internal/gc/range.go @@ -286,13 +286,7 @@ func walkrange(n *Node) *Node { // This runs *after* the condition check, so we know // advancing the pointer is safe and won't go past the // end of the allocation. - tmp = nod(OADD, hp, nodintconst(t.Elem().Width)) - - tmp.Type = hp.Type - tmp.SetTypecheck(1) - tmp.Right.Type = types.Types[types.Tptr] - tmp.Right.SetTypecheck(1) - a = nod(OAS, hp, tmp) + a = nod(OAS, hp, addptr(hp, t.Elem().Width)) a = typecheck(a, Etop) n.List.Set1(a) @@ -613,3 +607,18 @@ func arrayClear(n, v1, v2, a *Node) bool { n = walkstmt(n) return true } + +// addptr returns (*T)(uintptr(p) + n). +func addptr(p *Node, n int64) *Node { + t := p.Type + + p = nod(OCONVNOP, p, nil) + p.Type = types.Types[TUINTPTR] + + p = nod(OADD, p, nodintconst(n)) + + p = nod(OCONVNOP, p, nil) + p.Type = t + + return p +} diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go index 138ce08fec..2b67ef9a6f 100644 --- a/src/cmd/compile/internal/gc/ssa.go +++ b/src/cmd/compile/internal/gc/ssa.go @@ -1247,10 +1247,8 @@ var opToSSA = map[opAndType]ssa.Op{ opAndType{OADD, TUINT16}: ssa.OpAdd16, opAndType{OADD, TINT32}: ssa.OpAdd32, opAndType{OADD, TUINT32}: ssa.OpAdd32, - opAndType{OADD, TPTR32}: ssa.OpAdd32, opAndType{OADD, TINT64}: ssa.OpAdd64, opAndType{OADD, TUINT64}: ssa.OpAdd64, - opAndType{OADD, TPTR64}: ssa.OpAdd64, opAndType{OADD, TFLOAT32}: ssa.OpAdd32F, opAndType{OADD, TFLOAT64}: ssa.OpAdd64F, From d397d4bffc0fa917fa53970ded4b4d3524f88a5b Mon Sep 17 00:00:00 2001 From: Matthew Dempsky Date: Wed, 3 Oct 2018 15:47:16 -0700 Subject: [PATCH 006/240] cmd/compile: handle TPTR32 like TPTR64 in smallintconst In preparation for followup CL merging TPTR32 and TPTR64, move TPTR32 from the small-types fast path to the generic 64-bit fallback code so that it's in the same case clause as TPTR64. This should be safe, but theoretically it could change semantics because TPTR32 used to always be assumed to be "small", whereas now it will only be considered small for values less than 1<<31. This change is done in a separate CL so that it's more easily identified by git bisection in case it does introduce regressions. Change-Id: I6c7bb253d4e4d95c530a6e05a1147905674b55ca Reviewed-on: https://go-review.googlesource.com/c/139517 Run-TryBot: Matthew Dempsky TryBot-Result: Gobot Gobot Reviewed-by: Robert Griesemer --- src/cmd/compile/internal/gc/const.go | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/src/cmd/compile/internal/gc/const.go b/src/cmd/compile/internal/gc/const.go index 02d51678be..a80455a30c 100644 --- a/src/cmd/compile/internal/gc/const.go +++ b/src/cmd/compile/internal/gc/const.go @@ -1479,11 +1479,10 @@ func smallintconst(n *Node) bool { TUINT16, TINT32, TUINT32, - TBOOL, - TPTR32: + TBOOL: return true - case TIDEAL, TINT64, TUINT64, TPTR64: + case TIDEAL, TINT64, TUINT64, TPTR32, TPTR64: v, ok := n.Val().U.(*Mpint) if ok && v.Cmp(minintval[TINT32]) > 0 && v.Cmp(maxintval[TINT32]) < 0 { return true From 62e5215a2a12d95d1ce08cb6c996c3667e346779 Mon Sep 17 00:00:00 2001 From: Matthew Dempsky Date: Mon, 6 Nov 2017 14:50:30 -0800 Subject: [PATCH 007/240] cmd/compile: merge TPTR32 and TPTR64 as TPTR Change-Id: I0490098a7235458c5aede1135426a9f19f8584a7 Reviewed-on: https://go-review.googlesource.com/c/76312 Run-TryBot: Matthew Dempsky TryBot-Result: Gobot Gobot Reviewed-by: Robert Griesemer --- src/cmd/compile/internal/gc/alg.go | 2 +- src/cmd/compile/internal/gc/align.go | 8 ++---- src/cmd/compile/internal/gc/bexport.go | 2 +- src/cmd/compile/internal/gc/const.go | 4 +-- src/cmd/compile/internal/gc/esc.go | 2 +- src/cmd/compile/internal/gc/fmt.go | 2 +- src/cmd/compile/internal/gc/iexport.go | 4 +-- src/cmd/compile/internal/gc/pgen_test.go | 2 +- src/cmd/compile/internal/gc/plive.go | 5 ++-- src/cmd/compile/internal/gc/reflect.go | 17 ++++++------- src/cmd/compile/internal/gc/ssa.go | 6 ++--- src/cmd/compile/internal/gc/subr.go | 6 ++--- src/cmd/compile/internal/gc/typecheck.go | 3 +-- src/cmd/compile/internal/gc/types.go | 4 +-- src/cmd/compile/internal/gc/universe.go | 23 ++++++----------- src/cmd/compile/internal/gc/walk.go | 2 +- src/cmd/compile/internal/ssa/export_test.go | 1 - src/cmd/compile/internal/types/type.go | 28 ++++++++------------- src/cmd/compile/internal/types/utils.go | 3 --- 19 files changed, 45 insertions(+), 79 deletions(-) diff --git a/src/cmd/compile/internal/gc/alg.go b/src/cmd/compile/internal/gc/alg.go index b7d88531fd..9a13ed368b 100644 --- a/src/cmd/compile/internal/gc/alg.go +++ b/src/cmd/compile/internal/gc/alg.go @@ -102,7 +102,7 @@ func algtype1(t *types.Type) (AlgKind, *types.Type) { case TINT8, TUINT8, TINT16, TUINT16, TINT32, TUINT32, TINT64, TUINT64, TINT, TUINT, TUINTPTR, - TBOOL, TPTR32, TPTR64, + TBOOL, TPTR, TCHAN, TUNSAFEPTR: return AMEM, nil diff --git a/src/cmd/compile/internal/gc/align.go b/src/cmd/compile/internal/gc/align.go index 9e752fc628..fb761d2339 100644 --- a/src/cmd/compile/internal/gc/align.go +++ b/src/cmd/compile/internal/gc/align.go @@ -250,12 +250,8 @@ func dowidth(t *types.Type) { w = 16 t.Align = uint8(Widthreg) - case TPTR32: - w = 4 - checkwidth(t.Elem()) - - case TPTR64: - w = 8 + case TPTR: + w = int64(Widthptr) checkwidth(t.Elem()) case TUNSAFEPTR: diff --git a/src/cmd/compile/internal/gc/bexport.go b/src/cmd/compile/internal/gc/bexport.go index 3ef1e6af4d..7c09ab5a34 100644 --- a/src/cmd/compile/internal/gc/bexport.go +++ b/src/cmd/compile/internal/gc/bexport.go @@ -43,7 +43,7 @@ func (p *exporter) markType(t *types.Type) { // the user already needs some way to construct values of // those types. switch t.Etype { - case TPTR32, TPTR64, TARRAY, TSLICE, TCHAN: + case TPTR, TARRAY, TSLICE, TCHAN: // TODO(mdempsky): Skip marking element type for // send-only channels? p.markType(t.Elem()) diff --git a/src/cmd/compile/internal/gc/const.go b/src/cmd/compile/internal/gc/const.go index a80455a30c..effed1f4ac 100644 --- a/src/cmd/compile/internal/gc/const.go +++ b/src/cmd/compile/internal/gc/const.go @@ -347,7 +347,7 @@ func convlit1(n *Node, t *types.Type, explicit bool, reuse canReuseNode) *Node { case TARRAY: goto bad - case TPTR32, TPTR64, TUNSAFEPTR: + case TPTR, TUNSAFEPTR: n.SetVal(Val{new(Mpint)}) case TCHAN, TFUNC, TINTER, TMAP, TSLICE: @@ -1482,7 +1482,7 @@ func smallintconst(n *Node) bool { TBOOL: return true - case TIDEAL, TINT64, TUINT64, TPTR32, TPTR64: + case TIDEAL, TINT64, TUINT64, TPTR: v, ok := n.Val().U.(*Mpint) if ok && v.Cmp(minintval[TINT32]) > 0 && v.Cmp(maxintval[TINT32]) < 0 { return true diff --git a/src/cmd/compile/internal/gc/esc.go b/src/cmd/compile/internal/gc/esc.go index 145007f5e1..94190f0020 100644 --- a/src/cmd/compile/internal/gc/esc.go +++ b/src/cmd/compile/internal/gc/esc.go @@ -1507,7 +1507,7 @@ func (e *EscState) addDereference(n *Node) *Node { e.nodeEscState(ind).Loopdepth = e.nodeEscState(n).Loopdepth ind.Pos = n.Pos t := n.Type - if t.IsKind(types.Tptr) || t.IsSlice() { + if t.IsPtr() || t.IsSlice() { // This should model our own sloppy use of OIND to encode // decreasing levels of indirection; i.e., "indirecting" a slice // yields the type of an element. diff --git a/src/cmd/compile/internal/gc/fmt.go b/src/cmd/compile/internal/gc/fmt.go index 5d2e36ee51..28e9b9b6dc 100644 --- a/src/cmd/compile/internal/gc/fmt.go +++ b/src/cmd/compile/internal/gc/fmt.go @@ -697,7 +697,7 @@ func typefmt(t *types.Type, flag FmtFlag, mode fmtMode, depth int) string { } switch t.Etype { - case TPTR32, TPTR64: + case TPTR: switch mode { case FTypeId, FTypeIdName: if flag&FmtShort != 0 { diff --git a/src/cmd/compile/internal/gc/iexport.go b/src/cmd/compile/internal/gc/iexport.go index 3007c9cabf..d90c97ad92 100644 --- a/src/cmd/compile/internal/gc/iexport.go +++ b/src/cmd/compile/internal/gc/iexport.go @@ -617,7 +617,7 @@ func (w *exportWriter) doTyp(t *types.Type) { } switch t.Etype { - case TPTR32, TPTR64: + case TPTR: w.startType(pointerType) w.typ(t.Elem()) @@ -743,7 +743,7 @@ func constTypeOf(typ *types.Type) Ctype { return CTSTR case TINT, TINT8, TINT16, TINT32, TINT64, TUINT, TUINT8, TUINT16, TUINT32, TUINT64, TUINTPTR, - TPTR32, TPTR64, TUNSAFEPTR: + TPTR, TUNSAFEPTR: return CTINT case TFLOAT32, TFLOAT64: return CTFLT diff --git a/src/cmd/compile/internal/gc/pgen_test.go b/src/cmd/compile/internal/gc/pgen_test.go index d75c5b8239..89b977de85 100644 --- a/src/cmd/compile/internal/gc/pgen_test.go +++ b/src/cmd/compile/internal/gc/pgen_test.go @@ -20,7 +20,7 @@ func typeWithoutPointers() *types.Type { func typeWithPointers() *types.Type { t := types.New(TSTRUCT) - f := &types.Field{Type: types.New(TPTR64)} + f := &types.Field{Type: types.New(TPTR)} t.SetFields([]*types.Field{f}) return t } diff --git a/src/cmd/compile/internal/gc/plive.go b/src/cmd/compile/internal/gc/plive.go index 563b425db7..a38c33647e 100644 --- a/src/cmd/compile/internal/gc/plive.go +++ b/src/cmd/compile/internal/gc/plive.go @@ -534,7 +534,7 @@ func onebitwalktype1(t *types.Type, off int64, bv bvec) { TINT, TUINT, TUINTPTR, TBOOL, TFLOAT32, TFLOAT64, TCOMPLEX64, TCOMPLEX128: - case TPTR32, TPTR64, TUNSAFEPTR, TFUNC, TCHAN, TMAP: + case TPTR, TUNSAFEPTR, TFUNC, TCHAN, TMAP: if off&int64(Widthptr-1) != 0 { Fatalf("onebitwalktype1: invalid alignment, %v", t) } @@ -1163,8 +1163,7 @@ func clobberWalk(b *ssa.Block, v *Node, offset int64, t *types.Type) { return } switch t.Etype { - case TPTR32, - TPTR64, + case TPTR, TUNSAFEPTR, TFUNC, TCHAN, diff --git a/src/cmd/compile/internal/gc/reflect.go b/src/cmd/compile/internal/gc/reflect.go index 935c3b0503..3ef5682301 100644 --- a/src/cmd/compile/internal/gc/reflect.go +++ b/src/cmd/compile/internal/gc/reflect.go @@ -656,7 +656,7 @@ func typePkg(t *types.Type) *types.Pkg { tsym := t.Sym if tsym == nil { switch t.Etype { - case TARRAY, TSLICE, TPTR32, TPTR64, TCHAN: + case TARRAY, TSLICE, TPTR, TCHAN: if t.Elem() != nil { tsym = t.Elem().Sym } @@ -714,8 +714,7 @@ var kinds = []int{ TFLOAT64: objabi.KindFloat64, TBOOL: objabi.KindBool, TSTRING: objabi.KindString, - TPTR32: objabi.KindPtr, - TPTR64: objabi.KindPtr, + TPTR: objabi.KindPtr, TSTRUCT: objabi.KindStruct, TINTER: objabi.KindInterface, TCHAN: objabi.KindChan, @@ -736,8 +735,7 @@ func typeptrdata(t *types.Type) int64 { } switch t.Etype { - case TPTR32, - TPTR64, + case TPTR, TUNSAFEPTR, TFUNC, TCHAN, @@ -1035,8 +1033,7 @@ func isreflexive(t *types.Type) bool { TINT64, TUINT64, TUINTPTR, - TPTR32, - TPTR64, + TPTR, TUNSAFEPTR, TSTRING, TCHAN: @@ -1071,7 +1068,7 @@ func isreflexive(t *types.Type) bool { func needkeyupdate(t *types.Type) bool { switch t.Etype { case TBOOL, TINT, TUINT, TINT8, TUINT8, TINT16, TUINT16, TINT32, TUINT32, - TINT64, TUINT64, TUINTPTR, TPTR32, TPTR64, TUNSAFEPTR, TCHAN: + TINT64, TUINT64, TUINTPTR, TPTR, TUNSAFEPTR, TCHAN: return false case TFLOAT32, TFLOAT64, TCOMPLEX64, TCOMPLEX128, // floats and complex can be +0/-0 @@ -1279,7 +1276,7 @@ func dtypesym(t *types.Type) *obj.LSym { ot = duint8(lsym, ot, uint8(obj.Bool2int(needkeyupdate(t.Key())))) ot = dextratype(lsym, ot, t, 0) - case TPTR32, TPTR64: + case TPTR: if t.Elem().Etype == TANY { // ../../../../runtime/type.go:/UnsafePointerType ot = dcommontype(lsym, t) @@ -1356,7 +1353,7 @@ func dtypesym(t *types.Type) *obj.LSym { // functions must return the existing type structure rather // than creating a new one. switch t.Etype { - case TPTR32, TPTR64, TARRAY, TCHAN, TFUNC, TMAP, TSLICE, TSTRUCT: + case TPTR, TARRAY, TCHAN, TFUNC, TMAP, TSLICE, TSTRUCT: keep = true } } diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go index 2b67ef9a6f..469fbb8c96 100644 --- a/src/cmd/compile/internal/gc/ssa.go +++ b/src/cmd/compile/internal/gc/ssa.go @@ -1363,8 +1363,7 @@ var opToSSA = map[opAndType]ssa.Op{ opAndType{OEQ, TFUNC}: ssa.OpEqPtr, opAndType{OEQ, TMAP}: ssa.OpEqPtr, opAndType{OEQ, TCHAN}: ssa.OpEqPtr, - opAndType{OEQ, TPTR32}: ssa.OpEqPtr, - opAndType{OEQ, TPTR64}: ssa.OpEqPtr, + opAndType{OEQ, TPTR}: ssa.OpEqPtr, opAndType{OEQ, TUINTPTR}: ssa.OpEqPtr, opAndType{OEQ, TUNSAFEPTR}: ssa.OpEqPtr, opAndType{OEQ, TFLOAT64}: ssa.OpEq64F, @@ -1384,8 +1383,7 @@ var opToSSA = map[opAndType]ssa.Op{ opAndType{ONE, TFUNC}: ssa.OpNeqPtr, opAndType{ONE, TMAP}: ssa.OpNeqPtr, opAndType{ONE, TCHAN}: ssa.OpNeqPtr, - opAndType{ONE, TPTR32}: ssa.OpNeqPtr, - opAndType{ONE, TPTR64}: ssa.OpNeqPtr, + opAndType{ONE, TPTR}: ssa.OpNeqPtr, opAndType{ONE, TUINTPTR}: ssa.OpNeqPtr, opAndType{ONE, TUNSAFEPTR}: ssa.OpNeqPtr, opAndType{ONE, TFLOAT64}: ssa.OpNeq64F, diff --git a/src/cmd/compile/internal/gc/subr.go b/src/cmd/compile/internal/gc/subr.go index 7e450e2e66..9a6c61a651 100644 --- a/src/cmd/compile/internal/gc/subr.go +++ b/src/cmd/compile/internal/gc/subr.go @@ -772,8 +772,7 @@ func assignop(src *types.Type, dst *types.Type, why *string) Op { // 5. src is the predeclared identifier nil and dst is a nillable type. if src.Etype == TNIL { switch dst.Etype { - case TPTR32, - TPTR64, + case TPTR, TFUNC, TMAP, TCHAN, @@ -2003,8 +2002,7 @@ func isdirectiface(t *types.Type) bool { } switch t.Etype { - case TPTR32, - TPTR64, + case TPTR, TCHAN, TMAP, TFUNC, diff --git a/src/cmd/compile/internal/gc/typecheck.go b/src/cmd/compile/internal/gc/typecheck.go index 4831ecca34..897dd710b9 100644 --- a/src/cmd/compile/internal/gc/typecheck.go +++ b/src/cmd/compile/internal/gc/typecheck.go @@ -87,8 +87,7 @@ var _typekind = []string{ TFLOAT64: "float64", TBOOL: "bool", TSTRING: "string", - TPTR32: "pointer", - TPTR64: "pointer", + TPTR: "pointer", TUNSAFEPTR: "unsafe.Pointer", TSTRUCT: "struct", TINTER: "interface", diff --git a/src/cmd/compile/internal/gc/types.go b/src/cmd/compile/internal/gc/types.go index aa0f066a46..ce82c3a52e 100644 --- a/src/cmd/compile/internal/gc/types.go +++ b/src/cmd/compile/internal/gc/types.go @@ -32,9 +32,7 @@ const ( TBOOL = types.TBOOL - TPTR32 = types.TPTR32 - TPTR64 = types.TPTR64 - + TPTR = types.TPTR TFUNC = types.TFUNC TSLICE = types.TSLICE TARRAY = types.TARRAY diff --git a/src/cmd/compile/internal/gc/universe.go b/src/cmd/compile/internal/gc/universe.go index dbc2d647c9..96980ad500 100644 --- a/src/cmd/compile/internal/gc/universe.go +++ b/src/cmd/compile/internal/gc/universe.go @@ -177,11 +177,8 @@ func typeinit() { simtype[et] = et } - types.Types[TPTR32] = types.New(TPTR32) - dowidth(types.Types[TPTR32]) - - types.Types[TPTR64] = types.New(TPTR64) - dowidth(types.Types[TPTR64]) + types.Types[TPTR] = types.New(TPTR) + dowidth(types.Types[TPTR]) t := types.New(TUNSAFEPTR) types.Types[TUNSAFEPTR] = t @@ -190,11 +187,6 @@ func typeinit() { asNode(t.Sym.Def).Name = new(Name) dowidth(types.Types[TUNSAFEPTR]) - types.Tptr = TPTR32 - if Widthptr == 8 { - types.Tptr = TPTR64 - } - for et := TINT8; et <= TUINT64; et++ { isInt[et] = true } @@ -263,8 +255,7 @@ func typeinit() { okforlen[TSLICE] = true okforlen[TSTRING] = true - okforeq[TPTR32] = true - okforeq[TPTR64] = true + okforeq[TPTR] = true okforeq[TUNSAFEPTR] = true okforeq[TINTER] = true okforeq[TCHAN] = true @@ -357,10 +348,10 @@ func typeinit() { types.Types[TINTER] = types.New(TINTER) // simple aliases - simtype[TMAP] = types.Tptr - simtype[TCHAN] = types.Tptr - simtype[TFUNC] = types.Tptr - simtype[TUNSAFEPTR] = types.Tptr + simtype[TMAP] = TPTR + simtype[TCHAN] = TPTR + simtype[TFUNC] = TPTR + simtype[TUNSAFEPTR] = TPTR array_array = int(Rnd(0, int64(Widthptr))) array_nel = int(Rnd(int64(array_array)+int64(Widthptr), int64(Widthptr))) diff --git a/src/cmd/compile/internal/gc/walk.go b/src/cmd/compile/internal/gc/walk.go index 1b1d36b61d..5aa2146a8c 100644 --- a/src/cmd/compile/internal/gc/walk.go +++ b/src/cmd/compile/internal/gc/walk.go @@ -2138,7 +2138,7 @@ func walkprint(nn *Node, init *Nodes) *Node { on = syslook("printiface") } on = substArgTypes(on, n.Type) // any-1 - case TPTR32, TPTR64, TCHAN, TMAP, TFUNC, TUNSAFEPTR: + case TPTR, TCHAN, TMAP, TFUNC, TUNSAFEPTR: on = syslook("printpointer") on = substArgTypes(on, n.Type) // any-1 case TSLICE: diff --git a/src/cmd/compile/internal/ssa/export_test.go b/src/cmd/compile/internal/ssa/export_test.go index 5832050a8a..9c776d4b16 100644 --- a/src/cmd/compile/internal/ssa/export_test.go +++ b/src/cmd/compile/internal/ssa/export_test.go @@ -163,7 +163,6 @@ func init() { } types.Dowidth = func(t *types.Type) {} - types.Tptr = types.TPTR64 for _, typ := range [...]struct { width int64 et types.EType diff --git a/src/cmd/compile/internal/types/type.go b/src/cmd/compile/internal/types/type.go index 25f8f826e6..e6e6127405 100644 --- a/src/cmd/compile/internal/types/type.go +++ b/src/cmd/compile/internal/types/type.go @@ -43,9 +43,7 @@ const ( TBOOL - TPTR32 - TPTR64 - + TPTR TFUNC TSLICE TARRAY @@ -137,7 +135,7 @@ type Type struct { // TFUNCARGS: FuncArgs // TCHANARGS: ChanArgs // TCHAN: *Chan - // TPTR32, TPTR64: Ptr + // TPTR: Ptr // TARRAY: *Array // TSLICE: Slice Extra interface{} @@ -461,7 +459,7 @@ func New(et EType) *Type { t.Extra = new(Struct) case TINTER: t.Extra = new(Interface) - case TPTR32, TPTR64: + case TPTR: t.Extra = Ptr{} case TCHANARGS: t.Extra = ChanArgs{} @@ -560,11 +558,7 @@ func NewPtr(elem *Type) *Type { return t } - if Tptr == 0 { - Fatalf("NewPtr: Tptr not initialized") - } - - t := New(Tptr) + t := New(TPTR) t.Extra = Ptr{Elem: elem} t.Width = int64(Widthptr) t.Align = uint8(Widthptr) @@ -619,7 +613,7 @@ func SubstAny(t *Type, types *[]*Type) *Type { t = (*types)[0] *types = (*types)[1:] - case TPTR32, TPTR64: + case TPTR: elem := SubstAny(t.Elem(), types) if elem != t.Elem() { t = t.copy() @@ -790,7 +784,7 @@ func (t *Type) Key() *Type { // Usable with pointers, channels, arrays, slices, and maps. func (t *Type) Elem() *Type { switch t.Etype { - case TPTR32, TPTR64: + case TPTR: return t.Extra.(Ptr).Elem case TARRAY: return t.Extra.(*Array).Elem @@ -1101,7 +1095,7 @@ func (t *Type) cmp(x *Type) Cmp { } return t.Elem().cmp(x.Elem()) - case TPTR32, TPTR64, TSLICE: + case TPTR, TSLICE: // No special cases for these, they are handled // by the general code after the switch. @@ -1199,7 +1193,7 @@ func (t *Type) cmp(x *Type) Cmp { panic(e) } - // Common element type comparison for TARRAY, TCHAN, TPTR32, TPTR64, and TSLICE. + // Common element type comparison for TARRAY, TCHAN, TPTR, and TSLICE. return t.Elem().cmp(x.Elem()) } @@ -1261,7 +1255,7 @@ func (t *Type) IsComplex() bool { // IsPtr reports whether t is a regular Go pointer type. // This does not include unsafe.Pointer. func (t *Type) IsPtr() bool { - return t.Etype == TPTR32 || t.Etype == TPTR64 + return t.Etype == TPTR } // IsUnsafePtr reports whether t is an unsafe pointer. @@ -1275,7 +1269,7 @@ func (t *Type) IsUnsafePtr() bool { // that consist of a single pointer shaped type. // TODO(mdempsky): Should it? See golang.org/issue/15028. func (t *Type) IsPtrShaped() bool { - return t.Etype == TPTR32 || t.Etype == TPTR64 || t.Etype == TUNSAFEPTR || + return t.Etype == TPTR || t.Etype == TUNSAFEPTR || t.Etype == TMAP || t.Etype == TCHAN || t.Etype == TFUNC } @@ -1449,7 +1443,7 @@ func Haspointers1(t *Type, ignoreNotInHeap bool) bool { } return false - case TPTR32, TPTR64, TSLICE: + case TPTR, TSLICE: return !(ignoreNotInHeap && t.Elem().NotInHeap()) case TTUPLE: diff --git a/src/cmd/compile/internal/types/utils.go b/src/cmd/compile/internal/types/utils.go index 0eac402f8e..caaeb889fb 100644 --- a/src/cmd/compile/internal/types/utils.go +++ b/src/cmd/compile/internal/types/utils.go @@ -11,9 +11,6 @@ import ( const BADWIDTH = -1000000000 -// Initialized by frontend. Exists only here. -var Tptr EType // either TPTR32 or TPTR64 - // The following variables must be initialized early by the frontend. // They are here to break import cycles. // TODO(gri) eliminate these dependencies. From d6ab653c78df74d49d882774228bda459de6c584 Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Wed, 3 Oct 2018 14:40:09 -0700 Subject: [PATCH 008/240] go/types: determine hasPtrRecv property from source rather than type LookupFieldOrMethod needs to know if a method receiver is a pointer type. Until now this was computed from the the method signature's receiver, which required the method signature to be type-checked. Furthermore, it required the receiver to be set before the method signature was fully type-checked in some cases (see issue #6638). This CL remembers this property during object resolution, when we know it from the source. With this CL, method signatures don't need to be type-checked before they can be looked up; this is a first step towards separating type checking of types and type-checking of associated methods. Updates #23203. Updates #26854. Change-Id: Ie3eb7976e8fe8176ea1b284fa7471a4b7000f80b Reviewed-on: https://go-review.googlesource.com/c/139422 Run-TryBot: Robert Griesemer TryBot-Result: Gobot Gobot Reviewed-by: Alan Donovan --- src/go/types/methodset.go | 15 ++++++++++++--- src/go/types/object.go | 3 ++- src/go/types/resolver.go | 2 ++ src/go/types/typexpr.go | 10 +++++++--- 4 files changed, 23 insertions(+), 7 deletions(-) diff --git a/src/go/types/methodset.go b/src/go/types/methodset.go index 2b810da728..c25236656e 100644 --- a/src/go/types/methodset.go +++ b/src/go/types/methodset.go @@ -255,8 +255,17 @@ func (s methodSet) add(list []*Func, index []int, indirect bool, multiples bool) } // ptrRecv reports whether the receiver is of the form *T. -// The receiver must exist. func ptrRecv(f *Func) bool { - _, isPtr := deref(f.typ.(*Signature).recv.typ) - return isPtr + // If a method's type is set, use that as the source of truth for the receiver. + if f.typ != nil { + _, isPtr := deref(f.typ.(*Signature).recv.typ) + return isPtr + } + + // If a method's type is not set it may be a method/function that is: + // 1) client-supplied (via NewFunc with no signature), or + // 2) internally created but not yet type-checked. + // For case 1) we can't do anything; the client must know what they are doing. + // For case 2) we can use the information gathered by the resolver. + return f.hasPtrRecv } diff --git a/src/go/types/object.go b/src/go/types/object.go index 07adfbc34c..cf773238a0 100644 --- a/src/go/types/object.go +++ b/src/go/types/object.go @@ -294,6 +294,7 @@ func (*Var) isDependency() {} // a variable may be a dependency of an initializa // An abstract method may belong to many interfaces due to embedding. type Func struct { object + hasPtrRecv bool // only valid for methods that don't have a type yet } // NewFunc returns a new function with the given signature, representing @@ -304,7 +305,7 @@ func NewFunc(pos token.Pos, pkg *Package, name string, sig *Signature) *Func { if sig != nil { typ = sig } - return &Func{object{nil, pos, pkg, name, typ, 0, colorFor(typ), token.NoPos}} + return &Func{object{nil, pos, pkg, name, typ, 0, colorFor(typ), token.NoPos}, false} } // FullName returns the package- or receiver-type-qualified name of diff --git a/src/go/types/resolver.go b/src/go/types/resolver.go index ec7e4ed1c5..c2726f4dd2 100644 --- a/src/go/types/resolver.go +++ b/src/go/types/resolver.go @@ -465,6 +465,8 @@ func (check *Checker) collectObjects() { typ := unparen(list[0].Type) if ptr, _ := typ.(*ast.StarExpr); ptr != nil { typ = unparen(ptr.X) + // TODO(gri): This may not be sufficient. See issue #27995. + f.hasPtrRecv = true } if base, _ := typ.(*ast.Ident); base != nil { // base is a potential base type name; determine diff --git a/src/go/types/typexpr.go b/src/go/types/typexpr.go index 12c5c7b0a5..bcdbc5906d 100644 --- a/src/go/types/typexpr.go +++ b/src/go/types/typexpr.go @@ -558,9 +558,13 @@ func (check *Checker) interfaceType(ityp *Interface, iface *ast.InterfaceType, d pos := name.Pos() // Don't type-check signature yet - use an // empty signature now and update it later. - // Since we know the receiver, set it up now - // (required to avoid crash in ptrRecv; see - // e.g. test case for issue 6638). + // But set up receiver since we know it and + // its position, and because interface method + // signatures don't get a receiver via regular + // type-checking (there isn't a receiver in the + // the method's AST). Setting the correct receiver + // type is also important for ptrRecv() (see methodset.go). + // // TODO(gri) Consider marking methods signatures // as incomplete, for better error messages. See // also the T4 and T5 tests in testdata/cycles2.src. From 6606cd3d3bee550e0693e1bfc5678e35f1a289bf Mon Sep 17 00:00:00 2001 From: Tobias Klauser Date: Thu, 4 Oct 2018 15:37:49 +0200 Subject: [PATCH 009/240] cmd/compile: regenerate known formats for TestFormats This fixes the build for long-running tests after CL 139338 Change-Id: Ib8adfa785d41c736188e2ff7e14125de045b96b9 Reviewed-on: https://go-review.googlesource.com/c/139637 Run-TryBot: Tobias Klauser TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/cmd/compile/fmt_test.go | 1 - 1 file changed, 1 deletion(-) diff --git a/src/cmd/compile/fmt_test.go b/src/cmd/compile/fmt_test.go index 65f88dfff9..6dfdea1a34 100644 --- a/src/cmd/compile/fmt_test.go +++ b/src/cmd/compile/fmt_test.go @@ -583,7 +583,6 @@ var knownFormats = map[string]string{ "*cmd/compile/internal/ssa.sparseTreeMapEntry %v": "", "*cmd/compile/internal/types.Field %p": "", "*cmd/compile/internal/types.Field %v": "", - "*cmd/compile/internal/types.Sym %+v": "", "*cmd/compile/internal/types.Sym %0S": "", "*cmd/compile/internal/types.Sym %S": "", "*cmd/compile/internal/types.Sym %p": "", From 011b8eb6bb9783ec6b22697810863f30ca7bda1f Mon Sep 17 00:00:00 2001 From: Austin Clements Date: Fri, 30 Jun 2017 12:18:27 -0400 Subject: [PATCH 010/240] runtime: don't double-zero treap nodes mheap_.treapalloc.alloc() already returns a zeroed treapNode. Don't bother re-zeroing all of the fields. Change-Id: Iea317040fbb72dfe5ef1e2c56c287680b065f2d9 Reviewed-on: https://go-review.googlesource.com/c/139460 Run-TryBot: Austin Clements Reviewed-by: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- src/runtime/mgclarge.go | 12 ------------ 1 file changed, 12 deletions(-) diff --git a/src/runtime/mgclarge.go b/src/runtime/mgclarge.go index e7fa831937..11a977d6ba 100644 --- a/src/runtime/mgclarge.go +++ b/src/runtime/mgclarge.go @@ -46,15 +46,6 @@ type treapNode struct { priority uint32 // random number used by treap algorithm to keep tree probabilistically balanced } -func (t *treapNode) init() { - t.right = nil - t.left = nil - t.parent = nil - t.spanKey = nil - t.npagesKey = 0 - t.priority = 0 -} - // isSpanInTreap is handy for debugging. One should hold the heap lock, usually // mheap_.lock(). func (t *treapNode) isSpanInTreap(s *mspan) bool { @@ -140,7 +131,6 @@ func (root *mTreap) insert(span *mspan) { // https://faculty.washington.edu/aragon/pubs/rst89.pdf t := (*treapNode)(mheap_.treapalloc.alloc()) - t.init() t.npagesKey = span.npages t.priority = fastrand() t.spanKey = span @@ -188,8 +178,6 @@ func (root *mTreap) removeNode(t *treapNode) { root.treap = nil } // Return the found treapNode's span after freeing the treapNode. - t.spanKey = nil - t.npagesKey = 0 mheap_.treapalloc.free(unsafe.Pointer(t)) } From 4c1c839a3d2270d846f5a6d1cd1287e8560f0265 Mon Sep 17 00:00:00 2001 From: Austin Clements Date: Thu, 4 Oct 2018 10:46:20 -0400 Subject: [PATCH 011/240] runtime: clarify table of arena sizes Currently the table of arena sizes mixes the number of entries in the L1 with the size of the L2. While the size of the L2 is important, this makes it hard to see what's actually going on because there's an implicit factor of sys.PtrSize. This changes the L2 column to say both the number of entries and the size that results in. This should hopefully make the relations between the columns of the table clearer, since they can now be plugged directly into the given formula. Change-Id: Ie677adaef763b893a2f620bd4fc3b8db314b3a1e Reviewed-on: https://go-review.googlesource.com/c/139697 Reviewed-by: Brad Fitzpatrick --- src/runtime/malloc.go | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/src/runtime/malloc.go b/src/runtime/malloc.go index c3fe1169dc..791bbe7850 100644 --- a/src/runtime/malloc.go +++ b/src/runtime/malloc.go @@ -216,16 +216,16 @@ const ( // The number of bits in a heap address, the size of heap // arenas, and the L1 and L2 arena map sizes are related by // - // (1 << addrBits) = arenaBytes * L1entries * L2entries + // (1 << addr bits) = arena size * L1 entries * L2 entries // // Currently, we balance these as follows: // - // Platform Addr bits Arena size L1 entries L2 size - // -------------- --------- ---------- ---------- ------- - // */64-bit 48 64MB 1 32MB - // windows/64-bit 48 4MB 64 8MB - // */32-bit 32 4MB 1 4KB - // */mips(le) 31 4MB 1 2KB + // Platform Addr bits Arena size L1 entries L2 entries + // -------------- --------- ---------- ---------- ----------- + // */64-bit 48 64MB 1 4M (32MB) + // windows/64-bit 48 4MB 64 1M (8MB) + // */32-bit 32 4MB 1 1024 (4KB) + // */mips(le) 31 4MB 1 512 (2KB) // heapArenaBytes is the size of a heap arena. The heap // consists of mappings of size heapArenaBytes, aligned to From f22c357a34521404c445dc2e848657ecbfa4ad5e Mon Sep 17 00:00:00 2001 From: Brad Fitzpatrick Date: Thu, 4 Oct 2018 15:26:04 +0000 Subject: [PATCH 012/240] os: make UserHomeDir specialize behavior for GOOS=android Change-Id: I69582662aeee7344226856c24907516ddfc92f60 Reviewed-on: https://go-review.googlesource.com/c/139717 Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot Reviewed-by: Elias Naur --- src/os/file.go | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/src/os/file.go b/src/os/file.go index eb2277dece..61f37f2489 100644 --- a/src/os/file.go +++ b/src/os/file.go @@ -387,16 +387,16 @@ func UserCacheDir() (string, error) { // On Windows, it returns the concatenation of %HOMEDRIVE% and %HOMEPATH%. // On Plan 9, it returns the $home environment variable. func UserHomeDir() string { - if runtime.GOOS == "windows" { + switch runtime.GOOS { + case "windows": return Getenv("HOMEDRIVE") + Getenv("HOMEPATH") - } - if runtime.GOOS == "plan9" { + case "plan9": return Getenv("home") - } - if runtime.GOOS == "nacl" { + case "nacl", "android": return "/" + default: + return Getenv("HOME") } - return Getenv("HOME") } // Chmod changes the mode of the named file to mode. From 497d24178fdc321a037150656d51bec40f93e6d6 Mon Sep 17 00:00:00 2001 From: Plekhanov Maxim Date: Thu, 21 Dec 2017 02:14:55 +0300 Subject: [PATCH 013/240] math: use Abs in Mod rather than if x < 0 { x = -x} MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit goos: linux goarch: amd64 pkg: math name old time/op new time/op delta Mod 64.7ns ± 2% 63.7ns ± 2% -1.52% (p=0.003 n=8+10) Change-Id: I851bec0fd6c223dab73e4a680b7393d49e81a0e8 Reviewed-on: https://go-review.googlesource.com/c/85095 Reviewed-by: Brad Fitzpatrick --- src/math/mod.go | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/src/math/mod.go b/src/math/mod.go index e1a414e5f9..7efc018a5d 100644 --- a/src/math/mod.go +++ b/src/math/mod.go @@ -24,16 +24,12 @@ func mod(x, y float64) float64 { if y == 0 || IsInf(x, 0) || IsNaN(x) || IsNaN(y) { return NaN() } - if y < 0 { - y = -y - } + y = Abs(y) yfr, yexp := Frexp(y) - sign := false r := x if x < 0 { r = -x - sign = true } for r >= y { @@ -43,7 +39,7 @@ func mod(x, y float64) float64 { } r = r - Ldexp(y, rexp-yexp) } - if sign { + if x < 0 { r = -r } return r From 47e71f3b6917113660a65a180e66c91fc6318458 Mon Sep 17 00:00:00 2001 From: Plekhanov Maxim Date: Sat, 23 Dec 2017 02:25:35 +0300 Subject: [PATCH 014/240] math: use Abs in Pow rather than if x < 0 { x = -x } MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit name old time/op new time/op delta PowInt 55.7ns ± 1% 53.4ns ± 2% -4.15% (p=0.000 n=9+9) PowFrac 133ns ± 1% 133ns ± 2% ~ (p=0.587 n=8+9) Change-Id: Ica0f4c2cbd554f2195c6d1762ed26742ff8e3924 Reviewed-on: https://go-review.googlesource.com/c/85375 Reviewed-by: Brad Fitzpatrick --- src/math/pow.go | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/src/math/pow.go b/src/math/pow.go index 336193bce1..2219a906b8 100644 --- a/src/math/pow.go +++ b/src/math/pow.go @@ -83,13 +83,7 @@ func pow(x, y float64) float64 { return 1 / Sqrt(x) } - absy := y - flip := false - if absy < 0 { - absy = -absy - flip = true - } - yi, yf := Modf(absy) + yi, yf := Modf(Abs(y)) if yf != 0 && x < 0 { return NaN() } @@ -147,9 +141,9 @@ func pow(x, y float64) float64 { } // ans = a1*2**ae - // if flip { ans = 1 / ans } + // if y < 0 { ans = 1 / ans } // but in the opposite order - if flip { + if y < 0 { a1 = 1 / a1 ae = -ae } From 6d73537128ad7ff35ba1dbc55fc2837b0989b6b2 Mon Sep 17 00:00:00 2001 From: Brad Fitzpatrick Date: Thu, 4 Oct 2018 17:06:21 +0000 Subject: [PATCH 015/240] debug/pe: skip a test on windows/arm It requires a DLL that's not available on windows/arm apparently. Fixes #27904 Change-Id: I082a273f62976b7184636c6aeca6201a7871d238 Reviewed-on: https://go-review.googlesource.com/c/139720 Run-TryBot: Brad Fitzpatrick Reviewed-by: Katie Hockman TryBot-Result: Gobot Gobot --- src/debug/pe/file_test.go | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/src/debug/pe/file_test.go b/src/debug/pe/file_test.go index 24cd673254..c65c82d342 100644 --- a/src/debug/pe/file_test.go +++ b/src/debug/pe/file_test.go @@ -535,7 +535,11 @@ func TestBuildingWindowsGUI(t *testing.T) { func TestImportTableInUnknownSection(t *testing.T) { if runtime.GOOS != "windows" { - t.Skip("skipping windows only test") + t.Skip("skipping Windows-only test") + } + if runtime.GOARCH == "arm" { + // Issue 27904 + t.Skip("skipping test on arm; no atmfd.dll available") } // first we need to find this font driver From d2170040617231a26ab0722d093ecb19e2ba8302 Mon Sep 17 00:00:00 2001 From: Alberto Donizetti Date: Wed, 3 Oct 2018 21:11:31 +0200 Subject: [PATCH 016/240] runtime: skip TestLldbPython when lldb is too old The TestLldbPython test is known to fail with very old lldb releases (3.8 and older). Skip the test when the lldb found on the system is too old. Fixes #22299 Change-Id: I8f78d6c0d995118f806dae87f3f04a9726473116 Reviewed-on: https://go-review.googlesource.com/c/139397 Reviewed-by: Ian Lance Taylor --- src/runtime/runtime-lldb_test.go | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/src/runtime/runtime-lldb_test.go b/src/runtime/runtime-lldb_test.go index fe3a0eb90d..c74e6ef029 100644 --- a/src/runtime/runtime-lldb_test.go +++ b/src/runtime/runtime-lldb_test.go @@ -10,7 +10,9 @@ import ( "os" "os/exec" "path/filepath" + "regexp" "runtime" + "strconv" "strings" "testing" ) @@ -25,6 +27,27 @@ func checkLldbPython(t *testing.T) { } lldbPath = strings.TrimSpace(string(out)) + // Check lldb version. The test is known to fail with 3.8 or older + // (see Issue #22299). + cmd = exec.Command("lldb", "--version") + out, err = cmd.CombinedOutput() + + // lldb --version should print "lldb version a.b.c" + re := regexp.MustCompile(` ([[:digit:]]+)\.([[:digit:]]+)`) + lldbVersion := re.FindStringSubmatch(string(out)) + if len(lldbVersion) != 3 { + t.Errorf("bad lldb --version output: %s", out) + } + major, err1 := strconv.Atoi(lldbVersion[1]) + minor, err2 := strconv.Atoi(lldbVersion[2]) + if err1 != nil || err2 != nil { + t.Errorf("bad lldb --version output: %s", out) + } + + if (major < 3) || (major == 3 && minor < 9) { + t.Skipf("skipping because lldb version %v.%v is too old (need >= 3.9)", major, minor) + } + cmd = exec.Command("/usr/bin/python2.7", "-c", "import sys;sys.path.append(sys.argv[1]);import lldb; print('go lldb python support')", lldbPath) out, err = cmd.CombinedOutput() From 808186203b9786c11073c7056767fdf82f49def6 Mon Sep 17 00:00:00 2001 From: Ben Shi Date: Tue, 11 Sep 2018 08:55:10 +0000 Subject: [PATCH 017/240] cmd/internal/obj/arm64: simplify ADD and SUB MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently "ADD $0x123456, Rs, Rd" will load pre-stored 0x123456 from the constant pool and use it for the addition. Total 12 bytes are cost. And so does SUB. This CL breaks it to "ADD 0x123000, Rs, Rd" + "ADD 0x000456, Rd, Rd". Both "0x123000" and "0x000456" can be directly encoded into the instruction binary code. So 4 bytes are saved. 1. The total size of pkg/android_arm64 decreases about 0.3KB. 2. The go1 benchmark show little regression (excluding noise). name old time/op new time/op delta BinaryTree17-4 15.9s ± 0% 15.9s ± 1% +0.10% (p=0.044 n=29+29) Fannkuch11-4 8.72s ± 0% 8.75s ± 0% +0.34% (p=0.000 n=30+24) FmtFprintfEmpty-4 173ns ± 0% 173ns ± 0% ~ (all equal) FmtFprintfString-4 368ns ± 0% 368ns ± 0% ~ (p=0.593 n=30+30) FmtFprintfInt-4 417ns ± 0% 417ns ± 0% ~ (all equal) FmtFprintfIntInt-4 673ns ± 0% 661ns ± 1% -1.70% (p=0.000 n=30+30) FmtFprintfPrefixedInt-4 805ns ± 0% 805ns ± 0% +0.10% (p=0.011 n=30+30) FmtFprintfFloat-4 1.09µs ± 0% 1.09µs ± 0% ~ (p=0.125 n=30+29) FmtManyArgs-4 2.68µs ± 0% 2.68µs ± 0% +0.07% (p=0.004 n=30+30) GobDecode-4 32.9ms ± 0% 33.2ms ± 1% +1.07% (p=0.000 n=29+29) GobEncode-4 29.5ms ± 0% 29.6ms ± 0% +0.26% (p=0.000 n=28+28) Gzip-4 1.38s ± 1% 1.35s ± 3% -1.94% (p=0.000 n=28+30) Gunzip-4 139ms ± 0% 139ms ± 0% +0.10% (p=0.000 n=28+29) HTTPClientServer-4 745µs ± 5% 742µs ± 3% ~ (p=0.405 n=28+29) JSONEncode-4 49.5ms ± 1% 49.9ms ± 0% +0.89% (p=0.000 n=30+30) JSONDecode-4 264ms ± 1% 264ms ± 0% +0.25% (p=0.001 n=30+30) Mandelbrot200-4 16.6ms ± 0% 16.6ms ± 0% ~ (p=0.507 n=29+29) GoParse-4 15.9ms ± 0% 16.0ms ± 1% +0.91% (p=0.002 n=23+30) RegexpMatchEasy0_32-4 379ns ± 0% 379ns ± 0% ~ (all equal) RegexpMatchEasy0_1K-4 1.31µs ± 0% 1.31µs ± 0% +0.09% (p=0.008 n=27+30) RegexpMatchEasy1_32-4 357ns ± 0% 358ns ± 0% +0.28% (p=0.000 n=28+29) RegexpMatchEasy1_1K-4 2.04µs ± 0% 2.04µs ± 0% ~ (p=0.850 n=30+30) RegexpMatchMedium_32-4 587ns ± 0% 589ns ± 0% +0.33% (p=0.000 n=30+30) RegexpMatchMedium_1K-4 162µs ± 0% 163µs ± 0% ~ (p=0.351 n=30+29) RegexpMatchHard_32-4 9.54µs ± 0% 9.60µs ± 0% +0.59% (p=0.000 n=28+30) RegexpMatchHard_1K-4 287µs ± 0% 287µs ± 0% +0.11% (p=0.000 n=26+29) Revcomp-4 2.50s ± 0% 2.50s ± 0% -0.13% (p=0.012 n=28+27) Template-4 312ms ± 1% 312ms ± 1% +0.20% (p=0.015 n=27+30) TimeParse-4 1.68µs ± 0% 1.68µs ± 0% -0.35% (p=0.000 n=30+30) TimeFormat-4 1.66µs ± 0% 1.64µs ± 0% -1.20% (p=0.000 n=25+29) [Geo mean] 246µs 246µs -0.00% name old speed new speed delta GobDecode-4 23.3MB/s ± 0% 23.1MB/s ± 1% -1.05% (p=0.000 n=29+29) GobEncode-4 26.0MB/s ± 0% 25.9MB/s ± 0% -0.25% (p=0.000 n=29+28) Gzip-4 14.1MB/s ± 1% 14.4MB/s ± 3% +1.94% (p=0.000 n=27+30) Gunzip-4 139MB/s ± 0% 139MB/s ± 0% -0.10% (p=0.000 n=28+29) JSONEncode-4 39.2MB/s ± 1% 38.9MB/s ± 0% -0.88% (p=0.000 n=30+30) JSONDecode-4 7.37MB/s ± 0% 7.35MB/s ± 0% -0.26% (p=0.001 n=30+30) GoParse-4 3.65MB/s ± 0% 3.62MB/s ± 1% -0.86% (p=0.001 n=23+30) RegexpMatchEasy0_32-4 84.3MB/s ± 0% 84.3MB/s ± 0% ~ (p=0.126 n=27+26) RegexpMatchEasy0_1K-4 784MB/s ± 0% 783MB/s ± 0% -0.10% (p=0.003 n=27+30) RegexpMatchEasy1_32-4 89.5MB/s ± 0% 89.3MB/s ± 0% -0.20% (p=0.000 n=27+29) RegexpMatchEasy1_1K-4 502MB/s ± 0% 502MB/s ± 0% ~ (p=0.858 n=30+28) RegexpMatchMedium_32-4 1.70MB/s ± 0% 1.70MB/s ± 0% -0.25% (p=0.000 n=30+30) RegexpMatchMedium_1K-4 6.30MB/s ± 0% 6.30MB/s ± 0% ~ (all equal) RegexpMatchHard_32-4 3.35MB/s ± 0% 3.33MB/s ± 0% -0.47% (p=0.000 n=30+30) RegexpMatchHard_1K-4 3.57MB/s ± 0% 3.56MB/s ± 0% -0.20% (p=0.000 n=27+30) Revcomp-4 102MB/s ± 0% 102MB/s ± 0% +0.14% (p=0.008 n=28+28) Template-4 6.23MB/s ± 0% 6.21MB/s ± 1% -0.21% (p=0.009 n=21+30) [Geo mean] 24.1MB/s 24.0MB/s -0.16% Change-Id: Ifcef3edb667540e2d86e586c23afcfbc2cf1340b Reviewed-on: https://go-review.googlesource.com/c/134536 Run-TryBot: Ben Shi TryBot-Result: Gobot Gobot Reviewed-by: Cherry Zhang --- src/cmd/asm/internal/asm/testdata/arm64.s | 12 ++++++++ src/cmd/internal/obj/arm64/a.out.go | 1 + src/cmd/internal/obj/arm64/anames7.go | 1 + src/cmd/internal/obj/arm64/asm7.go | 34 +++++++++++++++++++++-- 4 files changed, 46 insertions(+), 2 deletions(-) diff --git a/src/cmd/asm/internal/asm/testdata/arm64.s b/src/cmd/asm/internal/asm/testdata/arm64.s index 9e2e2b1dc5..079c620f9b 100644 --- a/src/cmd/asm/internal/asm/testdata/arm64.s +++ b/src/cmd/asm/internal/asm/testdata/arm64.s @@ -25,6 +25,18 @@ TEXT foo(SB), DUPOK|NOSPLIT, $-8 ADD R1, R2, R3 ADD R1, ZR, R3 ADD $1, R2, R3 + ADD $0x000aaa, R2, R3 // ADD $2730, R2, R3 // 43a82a91 + ADD $0x000aaa, R2 // ADD $2730, R2 // 42a82a91 + ADD $0xaaa000, R2, R3 // ADD $11182080, R2, R3 // 43a86a91 + ADD $0xaaa000, R2 // ADD $11182080, R2 // 42a86a91 + ADD $0xaaaaaa, R2, R3 // ADD $11184810, R2, R3 // 43a82a9163a86a91 + ADD $0xaaaaaa, R2 // ADD $11184810, R2 // 42a82a9142a86a91 + SUB $0x000aaa, R2, R3 // SUB $2730, R2, R3 // 43a82ad1 + SUB $0x000aaa, R2 // SUB $2730, R2 // 42a82ad1 + SUB $0xaaa000, R2, R3 // SUB $11182080, R2, R3 // 43a86ad1 + SUB $0xaaa000, R2 // SUB $11182080, R2 // 42a86ad1 + SUB $0xaaaaaa, R2, R3 // SUB $11184810, R2, R3 // 43a82ad163a86ad1 + SUB $0xaaaaaa, R2 // SUB $11184810, R2 // 42a82ad142a86ad1 ADD R1>>11, R2, R3 ADD R1<<22, R2, R3 ADD R1->33, R2, R3 diff --git a/src/cmd/internal/obj/arm64/a.out.go b/src/cmd/internal/obj/arm64/a.out.go index 65647c37ae..37df688b21 100644 --- a/src/cmd/internal/obj/arm64/a.out.go +++ b/src/cmd/internal/obj/arm64/a.out.go @@ -411,6 +411,7 @@ const ( C_MBCON // could be C_MOVCON or C_BITCON C_MOVCON // generated by a 16-bit constant, optionally inverted and/or shifted by multiple of 16 C_BITCON // bitfield and logical immediate masks + C_ADDCON2 // 24-bit constant C_LCON // 32-bit constant C_VCON // 64-bit constant C_FCON // floating-point constant diff --git a/src/cmd/internal/obj/arm64/anames7.go b/src/cmd/internal/obj/arm64/anames7.go index 92f0cec942..a768f2cbef 100644 --- a/src/cmd/internal/obj/arm64/anames7.go +++ b/src/cmd/internal/obj/arm64/anames7.go @@ -27,6 +27,7 @@ var cnames7 = []string{ "MBCON", "MOVCON", "BITCON", + "ADDCON2", "LCON", "VCON", "FCON", diff --git a/src/cmd/internal/obj/arm64/asm7.go b/src/cmd/internal/obj/arm64/asm7.go index 46fdcdcf7d..67cefe3aeb 100644 --- a/src/cmd/internal/obj/arm64/asm7.go +++ b/src/cmd/internal/obj/arm64/asm7.go @@ -192,6 +192,8 @@ var optab = []Optab{ {AADD, C_BITCON, C_RSP, C_NONE, C_RSP, 62, 8, 0, 0, 0}, {AADD, C_BITCON, C_NONE, C_NONE, C_RSP, 62, 8, 0, 0, 0}, {ACMP, C_BITCON, C_RSP, C_NONE, C_NONE, 62, 8, 0, 0, 0}, + {AADD, C_ADDCON2, C_RSP, C_NONE, C_RSP, 48, 8, 0, 0, 0}, + {AADD, C_ADDCON2, C_NONE, C_NONE, C_RSP, 48, 8, 0, 0, 0}, {AADD, C_VCON, C_RSP, C_NONE, C_RSP, 13, 8, 0, LFROM, 0}, {AADD, C_VCON, C_NONE, C_NONE, C_RSP, 13, 8, 0, LFROM, 0}, {ACMP, C_VCON, C_REG, C_NONE, C_NONE, 13, 8, 0, LFROM, 0}, @@ -1046,6 +1048,7 @@ func (c *ctxt7) addpool(p *obj.Prog, a *obj.Addr) { C_NOREG4K, C_LOREG, C_LACON, + C_ADDCON2, C_LCON, C_VCON: if a.Name == obj.NAME_EXTERN { @@ -1537,6 +1540,10 @@ func (c *ctxt7) aclass(a *obj.Addr) int { return C_BITCON } + if 0 <= v && v <= 0xffffff { + return C_ADDCON2 + } + if uint64(v) == uint64(uint32(v)) || v == int64(int32(v)) { return C_LCON } @@ -1595,7 +1602,12 @@ func (c *ctxt7) oplook(p *obj.Prog) *Optab { } a1 = int(p.From.Class) if a1 == 0 { - a1 = c.aclass(&p.From) + 1 + a0 := c.aclass(&p.From) + // do not break C_ADDCON2 when S bit is set + if (p.As == AADDS || p.As == AADDSW || p.As == ASUBS || p.As == ASUBSW) && a0 == C_ADDCON2 { + a0 = C_LCON + } + a1 = a0 + 1 p.From.Class = int8(a1) } @@ -1681,8 +1693,13 @@ func cmp(a int, b int) bool { return true } + case C_ADDCON2: + if b == C_ZCON || b == C_ADDCON || b == C_ADDCON0 { + return true + } + case C_LCON: - if b == C_ZCON || b == C_BITCON || b == C_ADDCON || b == C_ADDCON0 || b == C_ABCON || b == C_ABCON0 || b == C_MBCON || b == C_MOVCON { + if b == C_ZCON || b == C_BITCON || b == C_ADDCON || b == C_ADDCON0 || b == C_ABCON || b == C_ABCON0 || b == C_MBCON || b == C_MOVCON || b == C_ADDCON2 { return true } @@ -3474,6 +3491,19 @@ func (c *ctxt7) asmout(p *obj.Prog, o *Optab, out []uint32) { } o1 |= 0x1c1<<21 | uint32(rs&31)<<16 | uint32(rb&31)<<5 | uint32(rt&31) + case 48: /* ADD $C_ADDCON2, Rm, Rd */ + op := c.opirr(p, p.As) + if op&Sbit != 0 { + c.ctxt.Diag("can not break addition/subtraction when S bit is set", p) + } + rt := int(p.To.Reg) + r := int(p.Reg) + if r == 0 { + r = rt + } + o1 = c.oaddi(p, int32(op), int32(c.regoff(&p.From)) & 0x000fff, r, rt) + o2 = c.oaddi(p, int32(op), int32(c.regoff(&p.From)) & 0xfff000, rt, rt) + case 50: /* sys/sysl */ o1 = c.opirr(p, p.As) From fa179eb89d881565238a21a8a740de6ca3cf9bc2 Mon Sep 17 00:00:00 2001 From: Mikio Hara Date: Fri, 5 Oct 2018 04:47:09 +0900 Subject: [PATCH 018/240] vendor: update golang_org/x/net/route from upstream Updates the route package to git rev 68fc911 for: - 68fc911 re-adjust routing message alignment for FreeBSD 386 emulation - 4dfa261 fix typos in comments - ae89d30 avoid unnecessary type conversions Change-Id: I915e614e464acf85a8fc80f36f05a85a9246bb01 Reviewed-on: https://go-review.googlesource.com/c/139817 Run-TryBot: Mikio Hara TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/vendor/golang_org/x/net/route/interface.go | 2 +- src/vendor/golang_org/x/net/route/sys_freebsd.go | 5 ++++- src/vendor/golang_org/x/net/route/syscall.go | 2 +- 3 files changed, 6 insertions(+), 3 deletions(-) diff --git a/src/vendor/golang_org/x/net/route/interface.go b/src/vendor/golang_org/x/net/route/interface.go index 854906d9c4..05ef2a9ce3 100644 --- a/src/vendor/golang_org/x/net/route/interface.go +++ b/src/vendor/golang_org/x/net/route/interface.go @@ -37,7 +37,7 @@ func (m *InterfaceAddrMessage) Sys() []Sys { return nil } // address message. type InterfaceMulticastAddrMessage struct { Version int // message version - Type int // messsage type + Type int // message type Flags int // interface flags Index int // interface index Addrs []Addr // addresses diff --git a/src/vendor/golang_org/x/net/route/sys_freebsd.go b/src/vendor/golang_org/x/net/route/sys_freebsd.go index 89ba1c4e26..a1a0d79b61 100644 --- a/src/vendor/golang_org/x/net/route/sys_freebsd.go +++ b/src/vendor/golang_org/x/net/route/sys_freebsd.go @@ -57,7 +57,7 @@ func (m *InterfaceMessage) Sys() []Sys { func probeRoutingStack() (int, map[int]*wireFormat) { var p uintptr wordSize := int(unsafe.Sizeof(p)) - align := int(unsafe.Sizeof(p)) + align := wordSize // In the case of kern.supported_archs="amd64 i386", we need // to know the underlying kernel's architecture because the // alignment for routing facilities are set at the build time @@ -129,6 +129,9 @@ func probeRoutingStack() (int, map[int]*wireFormat) { } else { ifm.bodyOff = sizeofIfMsghdrFreeBSD11 } + if rel >= 1102000 { // see https://github.com/freebsd/freebsd/commit/027c7f4d66ff8d8c4a46c3665a5ee7d6d8462034#diff-ad4e5b7f1449ea3fc87bc97280de145b + align = wordSize + } } rtm.parse = rtm.parseRouteMessage ifm.parse = ifm.parseInterfaceMessage diff --git a/src/vendor/golang_org/x/net/route/syscall.go b/src/vendor/golang_org/x/net/route/syscall.go index c211188b10..5f69ea63d9 100644 --- a/src/vendor/golang_org/x/net/route/syscall.go +++ b/src/vendor/golang_org/x/net/route/syscall.go @@ -20,7 +20,7 @@ func sysctl(mib []int32, old *byte, oldlen *uintptr, new *byte, newlen uintptr) } else { p = unsafe.Pointer(&zero) } - _, _, errno := syscall.Syscall6(syscall.SYS___SYSCTL, uintptr(p), uintptr(len(mib)), uintptr(unsafe.Pointer(old)), uintptr(unsafe.Pointer(oldlen)), uintptr(unsafe.Pointer(new)), uintptr(newlen)) + _, _, errno := syscall.Syscall6(syscall.SYS___SYSCTL, uintptr(p), uintptr(len(mib)), uintptr(unsafe.Pointer(old)), uintptr(unsafe.Pointer(oldlen)), uintptr(unsafe.Pointer(new)), newlen) if errno != 0 { return error(errno) } From 1bca6cecc627cd708c6c5440eb14f84a99d5324b Mon Sep 17 00:00:00 2001 From: Jason Keene Date: Wed, 12 Sep 2018 20:35:58 -0600 Subject: [PATCH 019/240] cmd/go: ensure git attributes are set This change disables the export-subst and export-ignore attributes when creating zip files for modules. This is done to prevent the ziphash for a given repo/revision from differing based on variables such as git version or size of repo. The full rational for this change is detailed here: https://github.com/golang/go/issues/27153#issuecomment-420763082 Fixes #27153 Change-Id: Ib33f525d91d2581fa0b5d26e70d29620c7e685e9 Reviewed-on: https://go-review.googlesource.com/c/135175 Run-TryBot: Bryan C. Mills TryBot-Result: Gobot Gobot Reviewed-by: Bryan C. Mills --- src/cmd/go/internal/modfetch/codehost/git.go | 44 +++++++++++++++++++ .../testdata/script/mod_git_export_subst.txt | 21 +++++++++ 2 files changed, 65 insertions(+) create mode 100644 src/cmd/go/testdata/script/mod_git_export_subst.txt diff --git a/src/cmd/go/internal/modfetch/codehost/git.go b/src/cmd/go/internal/modfetch/codehost/git.go index 87940a8f02..bcf8609826 100644 --- a/src/cmd/go/internal/modfetch/codehost/git.go +++ b/src/cmd/go/internal/modfetch/codehost/git.go @@ -694,6 +694,10 @@ func (r *gitRepo) ReadZip(rev, subdir string, maxSize int64) (zip io.ReadCloser, return nil, "", err } + if err := ensureGitAttributes(r.dir); err != nil { + return nil, "", err + } + // Incredibly, git produces different archives depending on whether // it is running on a Windows system or not, in an attempt to normalize // text file line endings. Setting -c core.autocrlf=input means only @@ -709,3 +713,43 @@ func (r *gitRepo) ReadZip(rev, subdir string, maxSize int64) (zip io.ReadCloser, return ioutil.NopCloser(bytes.NewReader(archive)), "", nil } + +// ensureGitAttributes makes sure export-subst and export-ignore features are +// disabled for this repo. This is intended to be run prior to running git +// archive so that zip files are generated that produce consistent ziphashes +// for a given revision, independent of variables such as git version and the +// size of the repo. +// +// See: https://github.com/golang/go/issues/27153 +func ensureGitAttributes(repoDir string) (err error) { + const attr = "\n* -export-subst -export-ignore\n" + + d := repoDir + "/info" + p := d + "/attributes" + + if err := os.MkdirAll(d, 0755); err != nil { + return err + } + + f, err := os.OpenFile(p, os.O_CREATE|os.O_APPEND|os.O_RDWR, 0666) + if err != nil { + return err + } + defer func() { + closeErr := f.Close() + if closeErr != nil { + err = closeErr + } + }() + + b, err := ioutil.ReadAll(f) + if err != nil { + return err + } + if !bytes.HasSuffix(b, []byte(attr)) { + _, err := f.WriteString(attr) + return err + } + + return nil +} diff --git a/src/cmd/go/testdata/script/mod_git_export_subst.txt b/src/cmd/go/testdata/script/mod_git_export_subst.txt new file mode 100644 index 0000000000..2b8e2bc7bc --- /dev/null +++ b/src/cmd/go/testdata/script/mod_git_export_subst.txt @@ -0,0 +1,21 @@ +env GO111MODULE=on +env GOPROXY= + +# Testing that git export-subst is disabled +[!net] skip +[!exec:git] skip +go build + +-- x.go -- +package x + +import _ "github.com/jasonkeene/export-subst" + +-- go.mod -- +module x + +require github.com/jasonkeene/export-subst v0.0.0-20180927204031-5845945ec626 + +-- go.sum -- +github.com/jasonkeene/export-subst v0.0.0-20180927204031-5845945ec626 h1:AUkXi/xFnm7lH2pgtvVkGb7buRn1ywFHw+xDpZ29Rz0= +github.com/jasonkeene/export-subst v0.0.0-20180927204031-5845945ec626/go.mod h1:DwJXqVtrgrQkv3Giuf2Jh4YyubVe7y41S1eOIaysTJw= From 48e22da1d24dc5b038bd83a78553173af5474e76 Mon Sep 17 00:00:00 2001 From: Keith Randall Date: Thu, 4 Oct 2018 16:32:21 -0700 Subject: [PATCH 020/240] cmd/link: fix deferreturn location on wasm On wasm, pcln tables are indexed by "resumption point ID" instead of by pc offset. When finding a deferreturn call, we must find the associated resumption point ID for the deferreturn call. Update #27518 Fixes wasm bug introduced in CL 134637. Change-Id: I3d178a3f5203a06c0180a1aa2309bfb7f3014f0f Reviewed-on: https://go-review.googlesource.com/c/139898 Reviewed-by: Cherry Zhang --- src/cmd/link/internal/ld/pcln.go | 24 +++++++++++++++++++----- 1 file changed, 19 insertions(+), 5 deletions(-) diff --git a/src/cmd/link/internal/ld/pcln.go b/src/cmd/link/internal/ld/pcln.go index 24398fcc87..3eb3d05882 100644 --- a/src/cmd/link/internal/ld/pcln.go +++ b/src/cmd/link/internal/ld/pcln.go @@ -7,6 +7,7 @@ package ld import ( "cmd/internal/objabi" "cmd/internal/src" + "cmd/internal/sys" "cmd/link/internal/sym" "log" "os" @@ -314,13 +315,26 @@ func (ctxt *Link) pclntab() { // deferreturn deferreturn := uint32(0) + lastWasmAddr := uint32(0) for _, r := range s.R { + if ctxt.Arch.Family == sys.Wasm && r.Type == objabi.R_ADDR { + // Wasm does not have a live variable set at the deferreturn + // call itself. Instead it has one identified by the + // resumption point immediately preceding the deferreturn. + // The wasm code has a R_ADDR relocation which is used to + // set the resumption point to PC_B. + lastWasmAddr = uint32(r.Add) + } if r.Sym != nil && r.Sym.Name == "runtime.deferreturn" && r.Add == 0 { - // Note: the relocation target is in the call instruction, but - // is not necessarily the whole instruction (for instance, on - // x86 the relocation applies to bytes [1:5] of the 5 byte call - // instruction). - deferreturn = uint32(r.Off) + if ctxt.Arch.Family == sys.Wasm { + deferreturn = lastWasmAddr + } else { + // Note: the relocation target is in the call instruction, but + // is not necessarily the whole instruction (for instance, on + // x86 the relocation applies to bytes [1:5] of the 5 byte call + // instruction). + deferreturn = uint32(r.Off) + } break // only need one } } From 8256bcdae0da68644db1e33c0db86f5ac4395c4b Mon Sep 17 00:00:00 2001 From: Alex Brainman Date: Sat, 16 Jun 2018 16:23:52 +1000 Subject: [PATCH 021/240] cmd/link: move .rel symbol from .rdata into .text .rel symbol type is sym.SELFROSECT, and that makes .rel written into .rdata section. But .rel stores code - jump table used for external C functions. So we have to mark whole .rdata section as executable (IMAGE_SCN_MEM_EXECUTE), because of .rel presence in it. Move .rel into .text section, and make .rdata section non executable. I also had to move code that adjusted the size of .rel symbol before calling textaddress, otherwise textaddress would not calculate size of .text section correctly. Fixes #25926 Change-Id: I4962f5de7b367410154c8709adfcd8472de9ac1a Reviewed-on: https://go-review.googlesource.com/c/125455 Run-TryBot: Alex Brainman TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/cmd/link/internal/ld/data.go | 38 +++++++++++++++++++++++--------- src/cmd/link/internal/ld/main.go | 1 + src/cmd/link/internal/ld/pe.go | 9 -------- 3 files changed, 28 insertions(+), 20 deletions(-) diff --git a/src/cmd/link/internal/ld/data.go b/src/cmd/link/internal/ld/data.go index ee98aef20d..3cc9e294d2 100644 --- a/src/cmd/link/internal/ld/data.go +++ b/src/cmd/link/internal/ld/data.go @@ -529,11 +529,7 @@ func (ctxt *Link) reloc() { } } -func windynrelocsym(ctxt *Link, s *sym.Symbol) { - rel := ctxt.Syms.Lookup(".rel", 0) - if s == rel { - return - } +func windynrelocsym(ctxt *Link, rel, s *sym.Symbol) { for ri := range s.R { r := &s.R[ri] targ := r.Sym @@ -576,14 +572,31 @@ func windynrelocsym(ctxt *Link, s *sym.Symbol) { } } -func dynrelocsym(ctxt *Link, s *sym.Symbol) { - if ctxt.HeadType == objabi.Hwindows { - if ctxt.LinkMode == LinkInternal { - windynrelocsym(ctxt, s) - } +// windynrelocsyms generates jump table to C library functions that will be +// added later. windynrelocsyms writes the table into .rel symbol. +func (ctxt *Link) windynrelocsyms() { + if !(ctxt.HeadType == objabi.Hwindows && iscgo && ctxt.LinkMode == LinkInternal) { return } + if ctxt.Debugvlog != 0 { + ctxt.Logf("%5.2f windynrelocsyms\n", Cputime()) + } + /* relocation table */ + rel := ctxt.Syms.Lookup(".rel", 0) + rel.Attr |= sym.AttrReachable + rel.Type = sym.STEXT + ctxt.Textp = append(ctxt.Textp, rel) + + for _, s := range ctxt.Textp { + if s == rel { + continue + } + windynrelocsym(ctxt, rel, s) + } +} + +func dynrelocsym(ctxt *Link, s *sym.Symbol) { for ri := range s.R { r := &s.R[ri] if ctxt.BuildMode == BuildModePIE && ctxt.LinkMode == LinkInternal { @@ -605,9 +618,12 @@ func dynrelocsym(ctxt *Link, s *sym.Symbol) { } func dynreloc(ctxt *Link, data *[sym.SXREF][]*sym.Symbol) { + if ctxt.HeadType == objabi.Hwindows { + return + } // -d suppresses dynamic loader format, so we may as well not // compute these sections or mark their symbols as reachable. - if *FlagD && ctxt.HeadType != objabi.Hwindows { + if *FlagD { return } if ctxt.Debugvlog != 0 { diff --git a/src/cmd/link/internal/ld/main.go b/src/cmd/link/internal/ld/main.go index 905380a1db..2c5152f2e3 100644 --- a/src/cmd/link/internal/ld/main.go +++ b/src/cmd/link/internal/ld/main.go @@ -222,6 +222,7 @@ func Main(arch *sys.Arch, theArch Arch) { ctxt.dostkcheck() if ctxt.HeadType == objabi.Hwindows { ctxt.dope() + ctxt.windynrelocsyms() } ctxt.addexport() thearch.Gentext(ctxt) // trampolines, call stubs, etc. diff --git a/src/cmd/link/internal/ld/pe.go b/src/cmd/link/internal/ld/pe.go index db269c78e5..cf197f50b0 100644 --- a/src/cmd/link/internal/ld/pe.go +++ b/src/cmd/link/internal/ld/pe.go @@ -1461,12 +1461,6 @@ func addPEBaseReloc(ctxt *Link) { } func (ctxt *Link) dope() { - /* relocation table */ - rel := ctxt.Syms.Lookup(".rel", 0) - - rel.Attr |= sym.AttrReachable - rel.Type = sym.SELFROSECT - initdynimport(ctxt) initdynexport(ctxt) } @@ -1534,9 +1528,6 @@ func Asmbpe(ctxt *Link) { // some data symbols (e.g. masks) end up in the .rdata section, and they normally // expect larger alignment requirement than the default text section alignment. ro.characteristics |= IMAGE_SCN_ALIGN_32BYTES - } else { - // TODO(brainman): should not need IMAGE_SCN_MEM_EXECUTE, but I do not know why it carshes without it - ro.characteristics |= IMAGE_SCN_MEM_EXECUTE } ro.checkSegment(&Segrodata) pefile.rdataSect = ro From 415e948eaea05930b2a16bab6af9e38b24e8414b Mon Sep 17 00:00:00 2001 From: Austin Clements Date: Fri, 30 Jun 2017 12:10:01 -0400 Subject: [PATCH 022/240] runtime: improve mheap.alloc doc and let compiler check system stack The alloc_m documentation refers to concepts that don't exist (and maybe never did?). alloc_m is also not the API entry point to span allocation. Hence, rewrite the documentation for alloc and alloc_m. While we're here, document why alloc_m must run on the system stack and replace alloc_m's hand-implemented system stack check with a go:systemstack annotation. Change-Id: I30e263d8e53c2774a6614e1b44df5464838cef09 Reviewed-on: https://go-review.googlesource.com/c/139459 Run-TryBot: Austin Clements Reviewed-by: Michael Knyszek Reviewed-by: Keith Randall TryBot-Result: Gobot Gobot --- src/runtime/mheap.go | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/src/runtime/mheap.go b/src/runtime/mheap.go index 7a11bdc058..b92e27e4e0 100644 --- a/src/runtime/mheap.go +++ b/src/runtime/mheap.go @@ -657,13 +657,14 @@ func (h *mheap) reclaim(npage uintptr) { lock(&h.lock) } -// Allocate a new span of npage pages from the heap for GC'd memory -// and record its size class in the HeapMap and HeapMapCache. +// alloc_m is the internal implementation of mheap.alloc. +// +// alloc_m must run on the system stack because it locks the heap, so +// any stack growth during alloc_m would self-deadlock. +// +//go:systemstack func (h *mheap) alloc_m(npage uintptr, spanclass spanClass, large bool) *mspan { _g_ := getg() - if _g_ != _g_.m.g0 { - throw("_mheap_alloc not on g0 stack") - } lock(&h.lock) // To prevent excessive heap growth, before allocating n pages @@ -752,6 +753,12 @@ func (h *mheap) alloc_m(npage uintptr, spanclass spanClass, large bool) *mspan { return s } +// alloc allocates a new span of npage pages from the GC'd heap. +// +// Either large must be true or spanclass must indicates the span's +// size class and scannability. +// +// If needzero is true, the memory for the returned span will be zeroed. func (h *mheap) alloc(npage uintptr, spanclass spanClass, large bool, needzero bool) *mspan { // Don't do any operations that lock the heap on the G stack. // It might trigger stack growth, and the stack growth code needs From 28fa1da9db8eedf079f1b83fd39383e17b3d7e68 Mon Sep 17 00:00:00 2001 From: Meng Zhuo Date: Thu, 4 Oct 2018 16:46:22 +0800 Subject: [PATCH 023/240] cmd/api: explicit tagKey with GOOS and GOARCH The origin tagKey is just dirname if no tags input which will cause pkgCache missmatch if other imported pkg explicit on GOARCH or GOOS This CL will add GOOS and GOARCH to tagKey Fixes #8425 Fixes #21181 Change-Id: Ifc189cf6746d753ad7c7e5bb60621297fc0a4e35 Reviewed-on: https://go-review.googlesource.com/c/138315 Reviewed-by: Robert Griesemer --- api/except.txt | 2 ++ src/cmd/api/goapi.go | 14 ++++++++++---- src/cmd/api/goapi_test.go | 15 +++++++++++++++ src/cmd/api/testdata/src/issue21181/dep/p.go | 5 +++++ .../api/testdata/src/issue21181/dep/p_amd64.go | 1 + src/cmd/api/testdata/src/issue21181/indirect/p.go | 5 +++++ src/cmd/api/testdata/src/issue21181/p/p.go | 9 +++++++++ src/cmd/api/testdata/src/issue21181/p/p_amd64.go | 7 +++++++ .../api/testdata/src/issue21181/p/p_generic.go | 11 +++++++++++ 9 files changed, 65 insertions(+), 4 deletions(-) create mode 100644 src/cmd/api/testdata/src/issue21181/dep/p.go create mode 100644 src/cmd/api/testdata/src/issue21181/dep/p_amd64.go create mode 100644 src/cmd/api/testdata/src/issue21181/indirect/p.go create mode 100644 src/cmd/api/testdata/src/issue21181/p/p.go create mode 100644 src/cmd/api/testdata/src/issue21181/p/p_amd64.go create mode 100644 src/cmd/api/testdata/src/issue21181/p/p_generic.go diff --git a/api/except.txt b/api/except.txt index 9f7f3fe934..90b79f1592 100644 --- a/api/except.txt +++ b/api/except.txt @@ -6,6 +6,8 @@ pkg os, const ModeType = 2399141888 pkg os, const ModeType = 2399666176 pkg os (linux-arm), const O_SYNC = 4096 pkg os (linux-arm-cgo), const O_SYNC = 4096 +pkg os (linux-arm), const O_SYNC = 1052672 +pkg os (linux-arm-cgo), const O_SYNC = 1052672 pkg syscall (darwin-386), const ImplementsGetwd = false pkg syscall (darwin-386), func Fchflags(string, int) error pkg syscall (darwin-386-cgo), const ImplementsGetwd = false diff --git a/src/cmd/api/goapi.go b/src/cmd/api/goapi.go index 8cc78c01ed..9698f25b51 100644 --- a/src/cmd/api/goapi.go +++ b/src/cmd/api/goapi.go @@ -385,9 +385,7 @@ func (w *Walker) parseFile(dir, file string) (*ast.File, error) { return f, nil } -// The package cache doesn't operate correctly in rare (so far artificial) -// circumstances (issue 8425). Disable before debugging non-obvious errors -// from the type-checker. +// Disable before debugging non-obvious errors from the type-checker. const usePkgCache = true var ( @@ -398,7 +396,7 @@ var ( // tagKey returns the tag-based key to use in the pkgCache. // It is a comma-separated string; the first part is dir, the rest tags. // The satisfied tags are derived from context but only those that -// matter (the ones listed in the tags argument) are used. +// matter (the ones listed in the tags argument plus GOOS and GOARCH) are used. // The tags list, which came from go/build's Package.AllTags, // is known to be sorted. func tagKey(dir string, context *build.Context, tags []string) string { @@ -414,9 +412,17 @@ func tagKey(dir string, context *build.Context, tags []string) string { } // TODO: ReleaseTags (need to load default) key := dir + + // explicit on GOOS and GOARCH as global cache will use "all" cached packages for + // an indirect imported package. See https://github.com/golang/go/issues/21181 + // for more detail. + tags = append(tags, context.GOOS, context.GOARCH) + sort.Strings(tags) + for _, tag := range tags { if ctags[tag] { key += "," + tag + ctags[tag] = false } } return key diff --git a/src/cmd/api/goapi_test.go b/src/cmd/api/goapi_test.go index 3c4e50a21a..1c8e2a345b 100644 --- a/src/cmd/api/goapi_test.go +++ b/src/cmd/api/goapi_test.go @@ -188,3 +188,18 @@ func BenchmarkAll(b *testing.B) { } } } + +func TestIssue21181(t *testing.T) { + for _, c := range contexts { + c.Compiler = build.Default.Compiler + } + for _, context := range contexts { + w := NewWalker(context, "testdata/src/issue21181") + pkg, err := w.Import("p") + if err != nil { + t.Fatalf("%s: (%s-%s) %s %v", err, context.GOOS, context.GOARCH, + pkg.Name(), w.imported) + } + w.export(pkg) + } +} diff --git a/src/cmd/api/testdata/src/issue21181/dep/p.go b/src/cmd/api/testdata/src/issue21181/dep/p.go new file mode 100644 index 0000000000..2d8e0c4cce --- /dev/null +++ b/src/cmd/api/testdata/src/issue21181/dep/p.go @@ -0,0 +1,5 @@ +package dep + +type Interface interface { + N([]byte) +} diff --git a/src/cmd/api/testdata/src/issue21181/dep/p_amd64.go b/src/cmd/api/testdata/src/issue21181/dep/p_amd64.go new file mode 100644 index 0000000000..8a2343a0e2 --- /dev/null +++ b/src/cmd/api/testdata/src/issue21181/dep/p_amd64.go @@ -0,0 +1 @@ +package dep diff --git a/src/cmd/api/testdata/src/issue21181/indirect/p.go b/src/cmd/api/testdata/src/issue21181/indirect/p.go new file mode 100644 index 0000000000..e37cf3fc44 --- /dev/null +++ b/src/cmd/api/testdata/src/issue21181/indirect/p.go @@ -0,0 +1,5 @@ +package indirect + +import "dep" + +func F(dep.Interface) {} diff --git a/src/cmd/api/testdata/src/issue21181/p/p.go b/src/cmd/api/testdata/src/issue21181/p/p.go new file mode 100644 index 0000000000..a704160edc --- /dev/null +++ b/src/cmd/api/testdata/src/issue21181/p/p.go @@ -0,0 +1,9 @@ +package p + +import ( + "dep" +) + +type algo struct { + indrt func(dep.Interface) +} diff --git a/src/cmd/api/testdata/src/issue21181/p/p_amd64.go b/src/cmd/api/testdata/src/issue21181/p/p_amd64.go new file mode 100644 index 0000000000..02b4cbf036 --- /dev/null +++ b/src/cmd/api/testdata/src/issue21181/p/p_amd64.go @@ -0,0 +1,7 @@ +package p + +import "indirect" + +var in = []algo{ + {indirect.F}, +} diff --git a/src/cmd/api/testdata/src/issue21181/p/p_generic.go b/src/cmd/api/testdata/src/issue21181/p/p_generic.go new file mode 100644 index 0000000000..4d75809676 --- /dev/null +++ b/src/cmd/api/testdata/src/issue21181/p/p_generic.go @@ -0,0 +1,11 @@ +// +build !amd64 + +package p + +import ( + "indirect" +) + +var in = []algo{ + {indirect.F}, +} From f2c1c7acf84a6ea8092f3b098de177b3265fbace Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Thu, 4 Oct 2018 12:59:09 -0700 Subject: [PATCH 024/240] go/types: fix recvPtr helper (follow-up on https://golang.org/cl/139422) The prior CL prepared go/types for the situation where methods might not have a type-checked signature when being looked up. The respective adjustments to recvPtr were not correct (but because so far method signatures are type-checked in time, the bug didn't manifest itself). Updates #23203. Updates #26854. Change-Id: I796691d11e6aac84396bdef802ad30715755fcc6 Reviewed-on: https://go-review.googlesource.com/c/139721 Reviewed-by: Alan Donovan --- src/go/types/methodset.go | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/src/go/types/methodset.go b/src/go/types/methodset.go index c25236656e..619c448492 100644 --- a/src/go/types/methodset.go +++ b/src/go/types/methodset.go @@ -256,9 +256,12 @@ func (s methodSet) add(list []*Func, index []int, indirect bool, multiples bool) // ptrRecv reports whether the receiver is of the form *T. func ptrRecv(f *Func) bool { - // If a method's type is set, use that as the source of truth for the receiver. - if f.typ != nil { - _, isPtr := deref(f.typ.(*Signature).recv.typ) + // If a method's receiver type is set, use that as the source of truth for the receiver. + // Caution: Checker.funcDecl (decl.go) marks a function by setting its type to an empty + // signature. We may reach here before the signature is fully set up: we must explicitly + // check if the receiver is set (we cannot just look for non-nil f.typ). + if sig, _ := f.typ.(*Signature); sig != nil && sig.recv != nil { + _, isPtr := deref(sig.recv.typ) return isPtr } From bf9240681dec2664f6acc1695e517e985d2b85d3 Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Wed, 3 Oct 2018 17:50:02 -0700 Subject: [PATCH 025/240] go/types: prepare for delayed type-checking of methods to when they are used Remove assumption that methods associated to concrete (non-interface) types have a fully set up signature. Such methods are found through LookupFieldOrMethod or lookupMethod, or indexed method access from a Named type. Make sure that the method's signature is type-checked before use in those cases. (MethodSets also hold methods but the type checker is not using them but for internal verification. API clients will be using it after all methods have been type-checked.) Some functions such as MissingMethod may now have to type-check a method and for that they need a *Checker. Add helper functions as necessary to provide the additional (receiver) parameter but permit it to be nil if the respective functions are invoked through the API (at which point we know that all methods have a proper signature and thus we don't need the delayed type-check). Since all package-level objects eventually are type-checked through the top-level loop in Checker.packageObjects we are guaranteed that all methods will be type-checked as well. Updates #23203. Updates #26854. Change-Id: I6e48f0016cefd498aa70b776e84a48215a9042c5 Reviewed-on: https://go-review.googlesource.com/c/139425 Reviewed-by: Alan Donovan --- src/go/types/api.go | 6 +++--- src/go/types/assignments.go | 2 +- src/go/types/builtins.go | 4 ++-- src/go/types/call.go | 5 +++++ src/go/types/conversions.go | 11 +++++++---- src/go/types/decl.go | 4 ++++ src/go/types/expr.go | 17 +++++++++++++---- src/go/types/lookup.go | 27 ++++++++++++++++++++++++--- src/go/types/operand.go | 8 +++++--- src/go/types/type.go | 2 +- src/go/types/typexpr.go | 2 +- 11 files changed, 66 insertions(+), 22 deletions(-) diff --git a/src/go/types/api.go b/src/go/types/api.go index b1fcb2d10b..1252aade35 100644 --- a/src/go/types/api.go +++ b/src/go/types/api.go @@ -353,20 +353,20 @@ func (conf *Config) Check(path string, fset *token.FileSet, files []*ast.File, i // AssertableTo reports whether a value of type V can be asserted to have type T. func AssertableTo(V *Interface, T Type) bool { - m, _ := assertableTo(V, T) + m, _ := (*Checker)(nil).assertableTo(V, T) return m == nil } // AssignableTo reports whether a value of type V is assignable to a variable of type T. func AssignableTo(V, T Type) bool { x := operand{mode: value, typ: V} - return x.assignableTo(nil, T, nil) // config not needed for non-constant x + return x.assignableTo(nil, T, nil) // check not needed for non-constant x } // ConvertibleTo reports whether a value of type V is convertible to a value of type T. func ConvertibleTo(V, T Type) bool { x := operand{mode: value, typ: V} - return x.convertibleTo(nil, T) // config not needed for non-constant x + return x.convertibleTo(nil, T) // check not needed for non-constant x } // Implements reports whether type V implements interface T. diff --git a/src/go/types/assignments.go b/src/go/types/assignments.go index 27002f6699..efa0cbba50 100644 --- a/src/go/types/assignments.go +++ b/src/go/types/assignments.go @@ -57,7 +57,7 @@ func (check *Checker) assignment(x *operand, T Type, context string) { return } - if reason := ""; !x.assignableTo(check.conf, T, &reason) { + if reason := ""; !x.assignableTo(check, T, &reason) { if reason != "" { check.errorf(x.pos(), "cannot use %s as %s value in %s: %s", x, T, context, reason) } else { diff --git a/src/go/types/builtins.go b/src/go/types/builtins.go index d3f0c4d40d..882c773db4 100644 --- a/src/go/types/builtins.go +++ b/src/go/types/builtins.go @@ -95,7 +95,7 @@ func (check *Checker) builtin(x *operand, call *ast.CallExpr, id builtinId) (_ b // spec: "As a special case, append also accepts a first argument assignable // to type []byte with a second argument of string type followed by ... . // This form appends the bytes of the string. - if nargs == 2 && call.Ellipsis.IsValid() && x.assignableTo(check.conf, NewSlice(universeByte), nil) { + if nargs == 2 && call.Ellipsis.IsValid() && x.assignableTo(check, NewSlice(universeByte), nil) { arg(x, 1) if x.mode == invalid { return @@ -345,7 +345,7 @@ func (check *Checker) builtin(x *operand, call *ast.CallExpr, id builtinId) (_ b return } - if !x.assignableTo(check.conf, m.key, nil) { + if !x.assignableTo(check, m.key, nil) { check.invalidArg(x.pos(), "%s is not assignable to %s", x, m.key) return } diff --git a/src/go/types/call.go b/src/go/types/call.go index d5c196afe8..52f1ac31ce 100644 --- a/src/go/types/call.go +++ b/src/go/types/call.go @@ -383,6 +383,11 @@ func (check *Checker) selector(x *operand, e *ast.SelectorExpr) { goto Error } + // methods may not have a fully set up signature yet + if m, _ := obj.(*Func); m != nil { + check.objDecl(m, nil) + } + if x.mode == typexpr { // method expression m, _ := obj.(*Func) diff --git a/src/go/types/conversions.go b/src/go/types/conversions.go index 81a65838fe..fecb7b617f 100644 --- a/src/go/types/conversions.go +++ b/src/go/types/conversions.go @@ -18,7 +18,7 @@ func (check *Checker) conversion(x *operand, T Type) { case constArg && isConstType(T): // constant conversion switch t := T.Underlying().(*Basic); { - case representableConst(x.val, check.conf, t, &x.val): + case representableConst(x.val, check, t, &x.val): ok = true case isInteger(x.typ) && isString(t): codepoint := int64(-1) @@ -31,7 +31,7 @@ func (check *Checker) conversion(x *operand, T Type) { x.val = constant.MakeString(string(codepoint)) ok = true } - case x.convertibleTo(check.conf, T): + case x.convertibleTo(check, T): // non-constant conversion x.mode = value ok = true @@ -76,9 +76,12 @@ func (check *Checker) conversion(x *operand, T Type) { // is tricky because we'd have to run updateExprType on the argument first. // (Issue #21982.) -func (x *operand) convertibleTo(conf *Config, T Type) bool { +// convertibleTo reports whether T(x) is valid. +// The check parameter may be nil if convertibleTo is invoked through an +// exported API call, i.e., when all methods have been type-checked. +func (x *operand) convertibleTo(check *Checker, T Type) bool { // "x is assignable to T" - if x.assignableTo(conf, T, nil) { + if x.assignableTo(check, T, nil) { return true } diff --git a/src/go/types/decl.go b/src/go/types/decl.go index 0ff1fb058b..b4a1eec1ac 100644 --- a/src/go/types/decl.go +++ b/src/go/types/decl.go @@ -586,6 +586,10 @@ func (check *Checker) addMethodDecls(obj *TypeName) { } // type-check + // TODO(gri): This call is not needed anymore because the code can handle + // method signatures that have not yet been type-checked. + // Remove in separate CL to make it easy to isolate issues + // that might be introduced by this change. check.objDecl(m, nil) if base != nil { diff --git a/src/go/types/expr.go b/src/go/types/expr.go index fc4de98eb7..87769d1db0 100644 --- a/src/go/types/expr.go +++ b/src/go/types/expr.go @@ -187,11 +187,20 @@ func roundFloat64(x constant.Value) constant.Value { // representable floating-point and complex values, and to an Int // value for integer values; it is left alone otherwise. // It is ok to provide the addressof the first argument for rounded. -func representableConst(x constant.Value, conf *Config, typ *Basic, rounded *constant.Value) bool { +// +// The check parameter may be nil if representableConst is invoked +// (indirectly) through an exported API call (AssignableTo, ConvertibleTo) +// because we don't need the Checker's config for those calls. +func representableConst(x constant.Value, check *Checker, typ *Basic, rounded *constant.Value) bool { if x.Kind() == constant.Unknown { return true // avoid follow-up errors } + var conf *Config + if check != nil { + conf = check.conf + } + switch { case isInteger(typ): x := constant.ToInt(x) @@ -323,7 +332,7 @@ func representableConst(x constant.Value, conf *Config, typ *Basic, rounded *con // representable checks that a constant operand is representable in the given basic type. func (check *Checker) representable(x *operand, typ *Basic) { assert(x.mode == constant_) - if !representableConst(x.val, check.conf, typ, &x.val) { + if !representableConst(x.val, check, typ, &x.val) { var msg string if isNumeric(x.typ) && isNumeric(typ) { // numeric conversion : error msg @@ -576,7 +585,7 @@ func (check *Checker) comparison(x, y *operand, op token.Token) { // spec: "In any comparison, the first operand must be assignable // to the type of the second operand, or vice versa." err := "" - if x.assignableTo(check.conf, y.typ, nil) || y.assignableTo(check.conf, x.typ, nil) { + if x.assignableTo(check, y.typ, nil) || y.assignableTo(check, x.typ, nil) { defined := false switch op { case token.EQL, token.NEQ: @@ -1547,7 +1556,7 @@ func keyVal(x constant.Value) interface{} { // typeAssertion checks that x.(T) is legal; xtyp must be the type of x. func (check *Checker) typeAssertion(pos token.Pos, x *operand, xtyp *Interface, T Type) { - method, wrongType := assertableTo(xtyp, T) + method, wrongType := check.assertableTo(xtyp, T) if method == nil { return } diff --git a/src/go/types/lookup.go b/src/go/types/lookup.go index f31ef9cfe9..e6764f45a0 100644 --- a/src/go/types/lookup.go +++ b/src/go/types/lookup.go @@ -6,6 +6,11 @@ package types +// Internal use of LookupFieldOrMethod: If the obj result is a method +// associated with a concrete (non-interface) type, the method's signature +// may not be fully set up. Call Checker.objDecl(obj, nil) before accessing +// the method's type. + // LookupFieldOrMethod looks up a field or method with given package and name // in T and returns the corresponding *Var or *Func, an index sequence, and a // bool indicating if there were any pointer indirections on the path to the @@ -112,7 +117,7 @@ func lookupFieldOrMethod(T Type, addressable bool, pkg *Package, name string) (o // look for a matching attached method if i, m := lookupMethod(named.methods, pkg, name); m != nil { // potential match - assert(m.typ != nil) + // caution: method may not have a proper signature yet index = concat(e.index, i) if obj != nil || e.multiples { return nil, index, false // collision @@ -248,6 +253,14 @@ func lookupType(m map[Type]int, typ Type) (int, bool) { // x is of interface type V). // func MissingMethod(V Type, T *Interface, static bool) (method *Func, wrongType bool) { + return (*Checker)(nil).missingMethod(V, T, static) +} + +// missingMethod is like MissingMethod but accepts a receiver. +// The receiver may be nil if missingMethod is invoked through +// an exported API call (such as MissingMethod), i.e., when all +// methods have been type-checked. +func (check *Checker) missingMethod(V Type, T *Interface, static bool) (method *Func, wrongType bool) { // fast path for common case if T.Empty() { return @@ -275,11 +288,17 @@ func MissingMethod(V Type, T *Interface, static bool) (method *Func, wrongType b for _, m := range T.allMethods { obj, _, _ := lookupFieldOrMethod(V, false, m.pkg, m.name) + // we must have a method (not a field of matching function type) f, _ := obj.(*Func) if f == nil { return m, false } + // methods may not have a fully set up signature yet + if check != nil { + check.objDecl(f, nil) + } + if !Identical(f.typ, m.typ) { return m, true } @@ -291,14 +310,16 @@ func MissingMethod(V Type, T *Interface, static bool) (method *Func, wrongType b // assertableTo reports whether a value of type V can be asserted to have type T. // It returns (nil, false) as affirmative answer. Otherwise it returns a missing // method required by V and whether it is missing or just has the wrong type. -func assertableTo(V *Interface, T Type) (method *Func, wrongType bool) { +// The receiver may be nil if assertableTo is invoked through an exported API call +// (such as AssertableTo), i.e., when all methods have been type-checked. +func (check *Checker) assertableTo(V *Interface, T Type) (method *Func, wrongType bool) { // no static check is required if T is an interface // spec: "If T is an interface type, x.(T) asserts that the // dynamic type of x implements the interface T." if _, ok := T.Underlying().(*Interface); ok && !strict { return } - return MissingMethod(T, V, false) + return check.missingMethod(T, V, false) } // deref dereferences typ if it is a *Pointer and returns its base and true. diff --git a/src/go/types/operand.go b/src/go/types/operand.go index 07247bd6f5..97ca6c622f 100644 --- a/src/go/types/operand.go +++ b/src/go/types/operand.go @@ -201,7 +201,9 @@ func (x *operand) isNil() bool { // assignableTo reports whether x is assignable to a variable of type T. // If the result is false and a non-nil reason is provided, it may be set // to a more detailed explanation of the failure (result != ""). -func (x *operand) assignableTo(conf *Config, T Type, reason *string) bool { +// The check parameter may be nil if assignableTo is invoked through +// an exported API call, i.e., when all methods have been type-checked. +func (x *operand) assignableTo(check *Checker, T Type, reason *string) bool { if x.mode == invalid || T == Typ[Invalid] { return true // avoid spurious errors } @@ -226,7 +228,7 @@ func (x *operand) assignableTo(conf *Config, T Type, reason *string) bool { return true } if x.mode == constant_ { - return representableConst(x.val, conf, t, nil) + return representableConst(x.val, check, t, nil) } // The result of a comparison is an untyped boolean, // but may not be a constant. @@ -249,7 +251,7 @@ func (x *operand) assignableTo(conf *Config, T Type, reason *string) bool { // T is an interface type and x implements T if Ti, ok := Tu.(*Interface); ok { - if m, wrongType := MissingMethod(x.typ, Ti, true); m != nil /* Implements(x.typ, Ti) */ { + if m, wrongType := check.missingMethod(x.typ, Ti, true); m != nil /* Implements(x.typ, Ti) */ { if reason != nil { if wrongType { *reason = "wrong type for method " + m.Name() diff --git a/src/go/types/type.go b/src/go/types/type.go index d9399a6587..74b6bcfd67 100644 --- a/src/go/types/type.go +++ b/src/go/types/type.go @@ -424,7 +424,7 @@ func (c *Chan) Elem() Type { return c.elem } type Named struct { obj *TypeName // corresponding declared object underlying Type // possibly a *Named during setup; never a *Named once set up completely - methods []*Func // methods declared for this type (not the method set of this type) + methods []*Func // methods declared for this type (not the method set of this type); signatures are type-checked lazily } // NewNamed returns a new named type for the given type name, underlying type, and associated methods. diff --git a/src/go/types/typexpr.go b/src/go/types/typexpr.go index bcdbc5906d..eb0d8e8fb9 100644 --- a/src/go/types/typexpr.go +++ b/src/go/types/typexpr.go @@ -391,7 +391,7 @@ func (check *Checker) arrayLength(e ast.Expr) int64 { } if isUntyped(x.typ) || isInteger(x.typ) { if val := constant.ToInt(x.val); val.Kind() == constant.Int { - if representableConst(val, check.conf, Typ[Int], nil) { + if representableConst(val, check, Typ[Int], nil) { if n, ok := constant.Int64Val(val); ok && n >= 0 { return n } From 8ae8576abf483cf928eb0f63bc55c09c7bf73576 Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Thu, 4 Oct 2018 16:20:48 -0700 Subject: [PATCH 026/240] go/types: don't type-check method signatures eagerly anymore As a side-effect we also get slightly clearer errors for some pathological cyclic method declarations. Fixes #23203. Updates #26854. Change-Id: I30bd6634ac6be26d3f4ef8c7b32e5c1bf76987dd Reviewed-on: https://go-review.googlesource.com/c/139897 Reviewed-by: Alan Donovan --- src/go/types/check_test.go | 2 ++ src/go/types/decl.go | 14 +------------- src/go/types/testdata/decls0.src | 8 ++++---- src/go/types/testdata/issue23203a.src | 14 ++++++++++++++ src/go/types/testdata/issue23203b.src | 14 ++++++++++++++ 5 files changed, 35 insertions(+), 17 deletions(-) create mode 100644 src/go/types/testdata/issue23203a.src create mode 100644 src/go/types/testdata/issue23203b.src diff --git a/src/go/types/check_test.go b/src/go/types/check_test.go index 2bdfc150f4..e8ba1a037c 100644 --- a/src/go/types/check_test.go +++ b/src/go/types/check_test.go @@ -92,6 +92,8 @@ var tests = [][]string{ {"testdata/blank.src"}, {"testdata/issue25008b.src", "testdata/issue25008a.src"}, // order (b before a) is crucial! {"testdata/issue26390.src"}, // stand-alone test to ensure case is triggered + {"testdata/issue23203a.src"}, + {"testdata/issue23203b.src"}, } var fset = token.NewFileSet() diff --git a/src/go/types/decl.go b/src/go/types/decl.go index b4a1eec1ac..5a6eda8ee4 100644 --- a/src/go/types/decl.go +++ b/src/go/types/decl.go @@ -515,11 +515,6 @@ func (check *Checker) typeDecl(obj *TypeName, typ ast.Expr, def *Named, alias bo } - // check and add associated methods - // TODO(gri) It's easy to create pathological cases where the - // current approach is incorrect: In general we need to know - // and add all methods _before_ type-checking the type. - // See https://play.golang.org/p/WMpE0q2wK8 check.addMethodDecls(obj) } @@ -567,7 +562,7 @@ func (check *Checker) addMethodDecls(obj *TypeName) { check.push(cutCycle) defer check.pop() - // type-check methods + // add valid methods for _, m := range methods { // spec: "For a base type, the non-blank names of methods bound // to it must be unique." @@ -585,13 +580,6 @@ func (check *Checker) addMethodDecls(obj *TypeName) { continue } - // type-check - // TODO(gri): This call is not needed anymore because the code can handle - // method signatures that have not yet been type-checked. - // Remove in separate CL to make it easy to isolate issues - // that might be introduced by this change. - check.objDecl(m, nil) - if base != nil { base.methods = append(base.methods, m) } diff --git a/src/go/types/testdata/decls0.src b/src/go/types/testdata/decls0.src index e75216172b..56adbbfaae 100644 --- a/src/go/types/testdata/decls0.src +++ b/src/go/types/testdata/decls0.src @@ -189,10 +189,10 @@ func f2(x *f2 /* ERROR "not a type" */ ) {} func f3() (x f3 /* ERROR "not a type" */ ) { return } func f4() (x *f4 /* ERROR "not a type" */ ) { return } -func (S0) m1(x S0.m1 /* ERROR "field or method" */ ) {} -func (S0) m2(x *S0.m2 /* ERROR "field or method" */ ) {} -func (S0) m3() (x S0.m3 /* ERROR "field or method" */ ) { return } -func (S0) m4() (x *S0.m4 /* ERROR "field or method" */ ) { return } +func (S0) m1 /* ERROR illegal cycle */ (x S0 /* ERROR value .* is not a type */ .m1) {} +func (S0) m2 /* ERROR illegal cycle */ (x *S0 /* ERROR value .* is not a type */ .m2) {} +func (S0) m3 /* ERROR illegal cycle */ () (x S0 /* ERROR value .* is not a type */ .m3) { return } +func (S0) m4 /* ERROR illegal cycle */ () (x *S0 /* ERROR value .* is not a type */ .m4) { return } // interfaces may not have any blank methods type BlankI interface { diff --git a/src/go/types/testdata/issue23203a.src b/src/go/types/testdata/issue23203a.src new file mode 100644 index 0000000000..48cb5889cd --- /dev/null +++ b/src/go/types/testdata/issue23203a.src @@ -0,0 +1,14 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package main + +import "unsafe" + +type T struct{} + +func (T) m1() {} +func (T) m2([unsafe.Sizeof(T.m1)]int) {} + +func main() {} diff --git a/src/go/types/testdata/issue23203b.src b/src/go/types/testdata/issue23203b.src new file mode 100644 index 0000000000..638ec6c5ce --- /dev/null +++ b/src/go/types/testdata/issue23203b.src @@ -0,0 +1,14 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package main + +import "unsafe" + +type T struct{} + +func (T) m2([unsafe.Sizeof(T.m1)]int) {} +func (T) m1() {} + +func main() {} From 6d51dd1e85bbed9f59023a468c4cbbeed598608f Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Thu, 4 Oct 2018 16:43:34 -0700 Subject: [PATCH 027/240] go/types: remove work-around for issue #26124 This work-around is not needed anymore now that method signatures are type-checked separately from their receiver base types: no artificial cycles are introduced anymore and so there is no need to artificially cut them. Updates #26124. Change-Id: I9d50171f12dd8977116a5d3f63ac39a06b1cd492 Reviewed-on: https://go-review.googlesource.com/c/139899 Reviewed-by: Alan Donovan --- src/go/types/decl.go | 26 ++------------------------ 1 file changed, 2 insertions(+), 24 deletions(-) diff --git a/src/go/types/decl.go b/src/go/types/decl.go index 5a6eda8ee4..3d8054de23 100644 --- a/src/go/types/decl.go +++ b/src/go/types/decl.go @@ -245,14 +245,6 @@ func (check *Checker) objDecl(obj Object, def *Named) { // Indirections are used to break type cycles. var indir = NewTypeName(token.NoPos, nil, "*", nil) -// cutCycle is a sentinel type name that is pushed onto the object path -// to indicate that a cycle doesn't actually exist. This is currently -// needed to break cycles formed via method declarations because they -// are type-checked together with their receiver base types. Once methods -// are type-checked separately (see also TODO in Checker.typeDecl), we -// can get rid of this. -var cutCycle = NewTypeName(token.NoPos, nil, "!", nil) - // typeCycle checks if the cycle starting with obj is valid and // reports an error if it is not. // TODO(gri) rename s/typeCycle/cycle/ once we don't need the other @@ -293,16 +285,10 @@ func (check *Checker) typeCycle(obj Object) (isCycle bool) { case *Const, *Var: nval++ case *TypeName: - switch { - case obj == indir: + if obj == indir { ncycle-- // don't count (indirections are not objects) hasIndir = true - case obj == cutCycle: - // The cycle is not real and only caused by the fact - // that we type-check methods when we type-check their - // receiver base types. - return false - default: + } else { // Determine if the type name is an alias or not. For // package-level objects, use the object map which // provides syntactic information (which doesn't rely @@ -554,14 +540,6 @@ func (check *Checker) addMethodDecls(obj *TypeName) { } } - // Suppress detection of type cycles occurring through method - // declarations - they wouldn't exist if methods were type- - // checked separately from their receiver base types. See also - // comment at the end of Checker.typeDecl. - // TODO(gri) Remove this once methods are type-checked separately. - check.push(cutCycle) - defer check.pop() - // add valid methods for _, m := range methods { // spec: "For a base type, the non-blank names of methods bound From 71d40c492fa92e710f9a3b2f26881a86f877ae95 Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Thu, 4 Oct 2018 17:16:33 -0700 Subject: [PATCH 028/240] go/types: remove work-around for issue #26390 This work-around is not needed anymore now that method signatures are type-checked separately from their receiver base types: no artificial cycles are introduced anymore and so there is no need to artificially cut them. Fixes #26854. Change-Id: I2ef15ceeaa0b486f65f6cdc466d0cf06246c74d7 Reviewed-on: https://go-review.googlesource.com/c/139900 Reviewed-by: Alan Donovan --- src/go/types/decl.go | 25 ------------------------- 1 file changed, 25 deletions(-) diff --git a/src/go/types/decl.go b/src/go/types/decl.go index 3d8054de23..1e2790a171 100644 --- a/src/go/types/decl.go +++ b/src/go/types/decl.go @@ -150,31 +150,6 @@ func (check *Checker) objDecl(obj Object, def *Named) { } case *TypeName: - // fixFor26390 enables a temporary work-around to handle alias type names - // that have not been given a type yet even though the underlying type - // is already known. See testdata/issue26390.src for a simple example. - // Set this flag to false to disable this code quickly (and comment - // out the new test in decls4.src that will fail again). - // TODO(gri) remove this for Go 1.12 in favor of a more comprehensive fix - const fixFor26390 = true - if fixFor26390 { - // If we have a package-level alias type name that has not been - // given a type yet but the underlying type is a type name that - // has been given a type already, don't report a cycle but use - // the underlying type name's type instead. The cycle shouldn't - // exist in the first place in this case and is due to the way - // methods are type-checked at the moment. See also the comment - // at the end of Checker.typeDecl below. - if d := check.objMap[obj]; d != nil && d.alias && obj.typ == Typ[Invalid] { - // If we can find the underlying type name syntactically - // and it has a type, use that type. - if tname := check.resolveBaseTypeName(ast.NewIdent(obj.name)); tname != nil && tname.typ != nil { - obj.typ = tname.typ - break - } - } - } - if check.typeCycle(obj) { // break cycle // (without this, calling underlying() From 497fd2c09ca4ed1d9f9d397aed71fce741e3588a Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Thu, 4 Oct 2018 17:30:42 -0700 Subject: [PATCH 029/240] go/types: remove a TODO, enable a test 1) Scopes do have a comment field for documentation (debugging output). No need to do anything extra. 2) The testcase in expr3.src has ok error messages. Enabled. Change-Id: Ic1a03bfec0a6a70d876aa6cfb936973abe58fe6c Reviewed-on: https://go-review.googlesource.com/c/139902 Reviewed-by: Alan Donovan --- src/go/types/scope.go | 3 --- src/go/types/testdata/expr3.src | 2 +- 2 files changed, 1 insertion(+), 4 deletions(-) diff --git a/src/go/types/scope.go b/src/go/types/scope.go index 839a60db2e..6cf5cc66f9 100644 --- a/src/go/types/scope.go +++ b/src/go/types/scope.go @@ -15,9 +15,6 @@ import ( "strings" ) -// TODO(gri) Provide scopes with a name or other mechanism so that -// objects can use that information for better printing. - // A Scope maintains a set of objects and links to its containing // (parent) and contained (children) scopes. Objects may be inserted // and looked up by name. The zero value for Scope is a ready-to-use diff --git a/src/go/types/testdata/expr3.src b/src/go/types/testdata/expr3.src index b4c8163324..d562f0b16b 100644 --- a/src/go/types/testdata/expr3.src +++ b/src/go/types/testdata/expr3.src @@ -497,7 +497,7 @@ func _calls() { f1(x ... /* ERROR "cannot use ..." */ ) f1(g0 /* ERROR "used as value" */ ()) f1(g1()) - // f1(g2()) // TODO(gri) missing position in error message + f1(g2 /* ERROR "cannot use g2" */ /* ERROR "too many arguments" */ ()) f2() /* ERROR "too few arguments" */ f2(3.14) /* ERROR "too few arguments" */ From 68d52969ddbfc8f90900f781d35201bea7b7869c Mon Sep 17 00:00:00 2001 From: Tobias Klauser Date: Fri, 5 Oct 2018 16:47:33 +0200 Subject: [PATCH 030/240] runtime: remove unused armArch runtime.armArch is unused on linux/arm since CL 93637. The new code in runtime/internal/atomic (added by CL 111315) only checks runtime.goarm. Change-Id: Ic097ee6750e39abb20f45770a1c7c2d925f02408 Reviewed-on: https://go-review.googlesource.com/c/140077 Run-TryBot: Tobias Klauser TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/runtime/os_linux_arm.go | 14 +------------- 1 file changed, 1 insertion(+), 13 deletions(-) diff --git a/src/runtime/os_linux_arm.go b/src/runtime/os_linux_arm.go index 8f082ba6a0..207b0e4d4d 100644 --- a/src/runtime/os_linux_arm.go +++ b/src/runtime/os_linux_arm.go @@ -4,20 +4,14 @@ package runtime -import ( - "internal/cpu" - "unsafe" -) +import "internal/cpu" const ( - _AT_PLATFORM = 15 // introduced in at least 2.6.11 - _HWCAP_VFP = 1 << 6 // introduced in at least 2.6.11 _HWCAP_VFPv3 = 1 << 13 // introduced in 2.6.30 ) var randomNumber uint32 -var armArch uint8 = 6 // we default to ARMv6 func checkgoarm() { // On Android, /proc/self/auxv might be unreadable and hwcap won't @@ -47,12 +41,6 @@ func archauxv(tag, val uintptr) { randomNumber = uint32(startupRandomData[4]) | uint32(startupRandomData[5])<<8 | uint32(startupRandomData[6])<<16 | uint32(startupRandomData[7])<<24 - case _AT_PLATFORM: // v5l, v6l, v7l - t := *(*uint8)(unsafe.Pointer(val + 1)) - if '5' <= t && t <= '7' { - armArch = t - '0' - } - case _AT_HWCAP: cpu.HWCap = uint(val) case _AT_HWCAP2: From 3d19d95932e2d864c5b9a71f9c78ef5c8b2eafbe Mon Sep 17 00:00:00 2001 From: Jordan Rhee Date: Fri, 5 Oct 2018 13:12:18 -0700 Subject: [PATCH 031/240] debug/pe: fix TestDWARF to work with relocations Fixes #27904 Change-Id: Ie2aad20cd66785b6cc1018c0048824382cb39f8c Reviewed-on: https://go-review.googlesource.com/c/140158 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/debug/pe/file_test.go | 77 ++++++++++++++++++++++++++++++++++++--- 1 file changed, 71 insertions(+), 6 deletions(-) diff --git a/src/debug/pe/file_test.go b/src/debug/pe/file_test.go index c65c82d342..4f0510200f 100644 --- a/src/debug/pe/file_test.go +++ b/src/debug/pe/file_test.go @@ -298,6 +298,17 @@ const ( linkCgoExternal ) +func getImageBase(f *File) uintptr { + switch oh := f.OptionalHeader.(type) { + case *OptionalHeader32: + return uintptr(oh.ImageBase) + case *OptionalHeader64: + return uintptr(oh.ImageBase) + default: + panic("unexpected optionalheader type") + } +} + func testDWARF(t *testing.T, linktype int) { if runtime.GOOS != "windows" { t.Skip("skipping windows only test") @@ -347,14 +358,15 @@ func testDWARF(t *testing.T, linktype int) { if err != nil { t.Fatalf("running test executable failed: %s %s", err, out) } + t.Logf("Testprog output:\n%s", string(out)) - matches := regexp.MustCompile("main=(.*)\n").FindStringSubmatch(string(out)) + matches := regexp.MustCompile("offset=(.*)\n").FindStringSubmatch(string(out)) if len(matches) < 2 { t.Fatalf("unexpected program output: %s", out) } - wantaddr, err := strconv.ParseUint(matches[1], 0, 64) + wantoffset, err := strconv.ParseUint(matches[1], 0, 64) if err != nil { - t.Fatalf("unexpected main address %q: %s", matches[1], err) + t.Fatalf("unexpected main offset %q: %s", matches[1], err) } f, err := Open(exe) @@ -363,6 +375,8 @@ func testDWARF(t *testing.T, linktype int) { } defer f.Close() + imageBase := getImageBase(f) + var foundDebugGDBScriptsSection bool for _, sect := range f.Sections { if sect.Name == ".debug_gdb_scripts" { @@ -389,10 +403,20 @@ func testDWARF(t *testing.T, linktype int) { break } if e.Tag == dwarf.TagSubprogram { - if name, ok := e.Val(dwarf.AttrName).(string); ok && name == "main.main" { - if addr, ok := e.Val(dwarf.AttrLowpc).(uint64); ok && addr == wantaddr { - return + name, ok := e.Val(dwarf.AttrName).(string) + if ok && name == "main.main" { + t.Logf("Found main.main") + addr, ok := e.Val(dwarf.AttrLowpc).(uint64) + if !ok { + t.Fatal("Failed to get AttrLowpc") } + offset := uintptr(addr) - imageBase + if offset != uintptr(wantoffset) { + t.Fatal("Runtime offset (0x%x) did "+ + "not match dwarf offset "+ + "(0x%x)", wantoffset, offset) + } + return } } } @@ -479,11 +503,52 @@ const testprog = ` package main import "fmt" +import "syscall" +import "unsafe" {{if .}}import "C" {{end}} +// struct MODULEINFO from the Windows SDK +type moduleinfo struct { + BaseOfDll uintptr + SizeOfImage uint32 + EntryPoint uintptr +} + +func add(p unsafe.Pointer, x uintptr) unsafe.Pointer { + return unsafe.Pointer(uintptr(p) + x) +} + +func funcPC(f interface{}) uintptr { + var a uintptr + return **(**uintptr)(add(unsafe.Pointer(&f), unsafe.Sizeof(a))) +} + func main() { + kernel32 := syscall.MustLoadDLL("kernel32.dll") + psapi := syscall.MustLoadDLL("psapi.dll") + getModuleHandle := kernel32.MustFindProc("GetModuleHandleW") + getCurrentProcess := kernel32.MustFindProc("GetCurrentProcess") + getModuleInformation := psapi.MustFindProc("GetModuleInformation") + + procHandle, _, _ := getCurrentProcess.Call() + moduleHandle, _, err := getModuleHandle.Call(0) + if moduleHandle == 0 { + panic(fmt.Sprintf("GetModuleHandle() failed: %d", err)) + } + + var info moduleinfo + ret, _, err := getModuleInformation.Call(procHandle, moduleHandle, + uintptr(unsafe.Pointer(&info)), unsafe.Sizeof(info)) + + if ret == 0 { + panic(fmt.Sprintf("GetModuleInformation() failed: %d", err)) + } + + offset := funcPC(main) - info.BaseOfDll + fmt.Printf("base=0x%x\n", info.BaseOfDll) fmt.Printf("main=%p\n", main) + fmt.Printf("offset=0x%x\n", offset) } ` From dc6eb200dd59dfedaa5259565b8ef1aa96a39271 Mon Sep 17 00:00:00 2001 From: Yuval Pavel Zholkover Date: Sat, 29 Sep 2018 18:17:29 +0300 Subject: [PATCH 032/240] syscall: FreeBSD 12 ino64 support This is similar to CL 136816 for x/sys/unix, changing the FreeBSD ABI to use 64-bit inodes in Stat_t, Statfs_t, and Dirent types. The changes are forward compatible, that is FreeBSD 10.x, 11.x continue to use their current sysnum numbers. The affected types are converted to the new layout (with some overhead). Thus the same statically linked binary should work using the native sysnums (without any conversion) on FreeBSD 12. Breaking API changes in package syscall are: Mknod takes a uint64 (C dev_t) instead of int. Stat_t: Dev, Ino, Nlink, Rdev, Gen became uint64. Atimespec, Mtimespec, Ctimespec, Birthtimespec renamed to Atim, Mtim, Ctim, Birthtim respectively. Statfs_t: Mntonname and Mntfromname changed from [88]int8 to [1024]int8 arrays. Dirent: Fileno became uint64, Namlen uint16 and an additional field Off int64 (currently unused) was added. The following commands were run to generate ztypes_* and zsyscall_* on FreeBSD-12.0-ALPHA6 systems (GOARCH=386 were run on the same amd64 host): GOOS=freebsd GOARCH=amd64 ./mksyscall.pl -tags freebsd,amd64 syscall_bsd.go syscall_freebsd.go syscall_freebsd_amd64.go |gofmt >zsyscall_freebsd_amd64.go GOOS=freebsd GOARCH=amd64 go tool cgo -godefs types_freebsd.go | GOOS=freebsd GOARCH=amd64 go run mkpost.go >ztypes_freebsd_amd64.go GOOS=freebsd GOARCH=386 ./mksyscall.pl -l32 -tags freebsd,386 syscall_bsd.go syscall_freebsd.go syscall_freebsd_386.go |gofmt >zsyscall_freebsd_386.go GOOS=freebsd GOARCH=386 go tool cgo -godefs types_freebsd.go | GOOS=freebsd GOARCH=386 go run mkpost.go >ztypes_freebsd_386.go GOOS=freebsd GOARCH=arm ./mksyscall.pl -l32 -arm -tags freebsd,arm syscall_bsd.go syscall_freebsd.go syscall_freebsd_arm.go |gofmt >zsyscall_freebsd_arm.go GOOS=freebsd GOARCH=arm go tool cgo -godefs -- -fsigned-char types_freebsd.go | GOOS=freebsd GOARCH=arm go run mkpost.go >ztypes_freebsd_arm.go The Kevent struct was changed to use the FREEBSD_COMPAT11 version always (requiring the COMPAT_FREEBSD11 kernel option FreeBSD-12, this is the default). The definitions of ifData were not updated, their functionality in has have been replaced by vendored golang.org/x/net/route. freebsdVersion initialization was dropped from init() in favor of a sync.Once based wrapper - supportsABI(). Updates #22448. Change-Id: I359b756e2849c036d7ed7f75dbd6ec836e0b90b4 Reviewed-on: https://go-review.googlesource.com/c/138595 Reviewed-by: Brad Fitzpatrick Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- api/except.txt | 98 +++++++++ src/archive/tar/stat_actime1.go | 2 +- src/archive/tar/stat_actime2.go | 2 +- src/os/stat_freebsd.go | 4 +- src/runtime/defs_freebsd.go | 3 +- src/syscall/route_freebsd.go | 4 - src/syscall/route_freebsd_32bit.go | 2 +- src/syscall/syscall_freebsd.go | 281 ++++++++++++++++++++++++-- src/syscall/types_freebsd.go | 72 +++---- src/syscall/zsyscall_freebsd_386.go | 96 ++++++++- src/syscall/zsyscall_freebsd_amd64.go | 96 ++++++++- src/syscall/zsyscall_freebsd_arm.go | 96 ++++++++- src/syscall/ztypes_freebsd_386.go | 111 ++++++++-- src/syscall/ztypes_freebsd_amd64.go | 105 ++++++++-- src/syscall/ztypes_freebsd_arm.go | 103 ++++++++-- 15 files changed, 923 insertions(+), 152 deletions(-) diff --git a/api/except.txt b/api/except.txt index 90b79f1592..a911783c6b 100644 --- a/api/except.txt +++ b/api/except.txt @@ -383,3 +383,101 @@ pkg syscall (windows-amd64), type CertRevocationInfo struct, CrlInfo uintptr pkg syscall (windows-amd64), type CertRevocationInfo struct, OidSpecificInfo uintptr pkg syscall (windows-amd64), type CertSimpleChain struct, TrustListInfo uintptr pkg syscall (windows-amd64), type RawSockaddrAny struct, Pad [96]int8 +pkg syscall (freebsd-386), func Mknod(string, uint32, int) error +pkg syscall (freebsd-386), type Dirent struct, Fileno uint32 +pkg syscall (freebsd-386), type Dirent struct, Namlen uint8 +pkg syscall (freebsd-386), type Stat_t struct, Atimespec Timespec +pkg syscall (freebsd-386), type Stat_t struct, Birthtimespec Timespec +pkg syscall (freebsd-386), type Stat_t struct, Blksize uint32 +pkg syscall (freebsd-386), type Stat_t struct, Ctimespec Timespec +pkg syscall (freebsd-386), type Stat_t struct, Dev uint32 +pkg syscall (freebsd-386), type Stat_t struct, Gen uint32 +pkg syscall (freebsd-386), type Stat_t struct, Ino uint32 +pkg syscall (freebsd-386), type Stat_t struct, Lspare int32 +pkg syscall (freebsd-386), type Stat_t struct, Mtimespec Timespec +pkg syscall (freebsd-386), type Stat_t struct, Nlink uint16 +pkg syscall (freebsd-386), type Stat_t struct, Pad_cgo_0 [8]uint8 +pkg syscall (freebsd-386), type Stat_t struct, Rdev uint32 +pkg syscall (freebsd-386), type Statfs_t struct, Mntfromname [88]int8 +pkg syscall (freebsd-386), type Statfs_t struct, Mntonname [88]int8 +pkg syscall (freebsd-386-cgo), func Mknod(string, uint32, int) error +pkg syscall (freebsd-386-cgo), type Dirent struct, Fileno uint32 +pkg syscall (freebsd-386-cgo), type Dirent struct, Namlen uint8 +pkg syscall (freebsd-386-cgo), type Stat_t struct, Atimespec Timespec +pkg syscall (freebsd-386-cgo), type Stat_t struct, Birthtimespec Timespec +pkg syscall (freebsd-386-cgo), type Stat_t struct, Blksize uint32 +pkg syscall (freebsd-386-cgo), type Stat_t struct, Ctimespec Timespec +pkg syscall (freebsd-386-cgo), type Stat_t struct, Dev uint32 +pkg syscall (freebsd-386-cgo), type Stat_t struct, Gen uint32 +pkg syscall (freebsd-386-cgo), type Stat_t struct, Ino uint32 +pkg syscall (freebsd-386-cgo), type Stat_t struct, Lspare int32 +pkg syscall (freebsd-386-cgo), type Stat_t struct, Mtimespec Timespec +pkg syscall (freebsd-386-cgo), type Stat_t struct, Nlink uint16 +pkg syscall (freebsd-386-cgo), type Stat_t struct, Pad_cgo_0 [8]uint8 +pkg syscall (freebsd-386-cgo), type Stat_t struct, Rdev uint32 +pkg syscall (freebsd-386-cgo), type Statfs_t struct, Mntfromname [88]int8 +pkg syscall (freebsd-386-cgo), type Statfs_t struct, Mntonname [88]int8 +pkg syscall (freebsd-amd64), func Mknod(string, uint32, int) error +pkg syscall (freebsd-amd64), type Dirent struct, Fileno uint32 +pkg syscall (freebsd-amd64), type Dirent struct, Namlen uint8 +pkg syscall (freebsd-amd64), type Stat_t struct, Atimespec Timespec +pkg syscall (freebsd-amd64), type Stat_t struct, Birthtimespec Timespec +pkg syscall (freebsd-amd64), type Stat_t struct, Blksize uint32 +pkg syscall (freebsd-amd64), type Stat_t struct, Ctimespec Timespec +pkg syscall (freebsd-amd64), type Stat_t struct, Dev uint32 +pkg syscall (freebsd-amd64), type Stat_t struct, Gen uint32 +pkg syscall (freebsd-amd64), type Stat_t struct, Ino uint32 +pkg syscall (freebsd-amd64), type Stat_t struct, Lspare int32 +pkg syscall (freebsd-amd64), type Stat_t struct, Mtimespec Timespec +pkg syscall (freebsd-amd64), type Stat_t struct, Nlink uint16 +pkg syscall (freebsd-amd64), type Stat_t struct, Rdev uint32 +pkg syscall (freebsd-amd64), type Statfs_t struct, Mntfromname [88]int8 +pkg syscall (freebsd-amd64), type Statfs_t struct, Mntonname [88]int8 +pkg syscall (freebsd-amd64-cgo), func Mknod(string, uint32, int) error +pkg syscall (freebsd-amd64-cgo), type Dirent struct, Fileno uint32 +pkg syscall (freebsd-amd64-cgo), type Dirent struct, Namlen uint8 +pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Atimespec Timespec +pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Birthtimespec Timespec +pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Blksize uint32 +pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Ctimespec Timespec +pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Dev uint32 +pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Gen uint32 +pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Ino uint32 +pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Lspare int32 +pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Mtimespec Timespec +pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Nlink uint16 +pkg syscall (freebsd-amd64-cgo), type Stat_t struct, Rdev uint32 +pkg syscall (freebsd-amd64-cgo), type Statfs_t struct, Mntfromname [88]int8 +pkg syscall (freebsd-amd64-cgo), type Statfs_t struct, Mntonname [88]int8 +pkg syscall (freebsd-arm), func Mknod(string, uint32, int) error +pkg syscall (freebsd-arm), type Dirent struct, Fileno uint32 +pkg syscall (freebsd-arm), type Dirent struct, Namlen uint8 +pkg syscall (freebsd-arm), type Stat_t struct, Atimespec Timespec +pkg syscall (freebsd-arm), type Stat_t struct, Birthtimespec Timespec +pkg syscall (freebsd-arm), type Stat_t struct, Blksize uint32 +pkg syscall (freebsd-arm), type Stat_t struct, Ctimespec Timespec +pkg syscall (freebsd-arm), type Stat_t struct, Dev uint32 +pkg syscall (freebsd-arm), type Stat_t struct, Gen uint32 +pkg syscall (freebsd-arm), type Stat_t struct, Ino uint32 +pkg syscall (freebsd-arm), type Stat_t struct, Lspare int32 +pkg syscall (freebsd-arm), type Stat_t struct, Mtimespec Timespec +pkg syscall (freebsd-arm), type Stat_t struct, Nlink uint16 +pkg syscall (freebsd-arm), type Stat_t struct, Rdev uint32 +pkg syscall (freebsd-arm), type Statfs_t struct, Mntfromname [88]int8 +pkg syscall (freebsd-arm), type Statfs_t struct, Mntonname [88]int8 +pkg syscall (freebsd-arm-cgo), func Mknod(string, uint32, int) error +pkg syscall (freebsd-arm-cgo), type Dirent struct, Fileno uint32 +pkg syscall (freebsd-arm-cgo), type Dirent struct, Namlen uint8 +pkg syscall (freebsd-arm-cgo), type Stat_t struct, Atimespec Timespec +pkg syscall (freebsd-arm-cgo), type Stat_t struct, Birthtimespec Timespec +pkg syscall (freebsd-arm-cgo), type Stat_t struct, Blksize uint32 +pkg syscall (freebsd-arm-cgo), type Stat_t struct, Ctimespec Timespec +pkg syscall (freebsd-arm-cgo), type Stat_t struct, Dev uint32 +pkg syscall (freebsd-arm-cgo), type Stat_t struct, Gen uint32 +pkg syscall (freebsd-arm-cgo), type Stat_t struct, Ino uint32 +pkg syscall (freebsd-arm-cgo), type Stat_t struct, Lspare int32 +pkg syscall (freebsd-arm-cgo), type Stat_t struct, Mtimespec Timespec +pkg syscall (freebsd-arm-cgo), type Stat_t struct, Nlink uint16 +pkg syscall (freebsd-arm-cgo), type Stat_t struct, Rdev uint32 +pkg syscall (freebsd-arm-cgo), type Statfs_t struct, Mntfromname [88]int8 +pkg syscall (freebsd-arm-cgo), type Statfs_t struct, Mntonname [88]int8 diff --git a/src/archive/tar/stat_actime1.go b/src/archive/tar/stat_actime1.go index cf9cc79c59..eb82edb6d9 100644 --- a/src/archive/tar/stat_actime1.go +++ b/src/archive/tar/stat_actime1.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build linux dragonfly openbsd solaris +// +build linux dragonfly freebsd openbsd solaris package tar diff --git a/src/archive/tar/stat_actime2.go b/src/archive/tar/stat_actime2.go index 6f17dbe307..f707012714 100644 --- a/src/archive/tar/stat_actime2.go +++ b/src/archive/tar/stat_actime2.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin freebsd netbsd +// +build darwin netbsd package tar diff --git a/src/os/stat_freebsd.go b/src/os/stat_freebsd.go index bab4ffa798..d36afa9ffd 100644 --- a/src/os/stat_freebsd.go +++ b/src/os/stat_freebsd.go @@ -12,7 +12,7 @@ import ( func fillFileStatFromSys(fs *fileStat, name string) { fs.name = basename(name) fs.size = fs.sys.Size - fs.modTime = timespecToTime(fs.sys.Mtimespec) + fs.modTime = timespecToTime(fs.sys.Mtim) fs.mode = FileMode(fs.sys.Mode & 0777) switch fs.sys.Mode & syscall.S_IFMT { case syscall.S_IFBLK: @@ -47,5 +47,5 @@ func timespecToTime(ts syscall.Timespec) time.Time { // For testing. func atime(fi FileInfo) time.Time { - return timespecToTime(fi.Sys().(*syscall.Stat_t).Atimespec) + return timespecToTime(fi.Sys().(*syscall.Stat_t).Atim) } diff --git a/src/runtime/defs_freebsd.go b/src/runtime/defs_freebsd.go index 29a6ec20a5..53c1508eb7 100644 --- a/src/runtime/defs_freebsd.go +++ b/src/runtime/defs_freebsd.go @@ -19,6 +19,7 @@ package runtime #include #include #include +#define _WANT_FREEBSD11_KEVENT 1 #include #include #include @@ -149,7 +150,7 @@ type Itimerval C.struct_itimerval type Umtx_time C.struct__umtx_time -type Kevent C.struct_kevent +type Kevent C.struct_kevent_freebsd11 type bintime C.struct_bintime type vdsoTimehands C.struct_vdso_timehands diff --git a/src/syscall/route_freebsd.go b/src/syscall/route_freebsd.go index 2c2de7474a..2b47faff42 100644 --- a/src/syscall/route_freebsd.go +++ b/src/syscall/route_freebsd.go @@ -6,11 +6,7 @@ package syscall import "unsafe" -// See http://www.freebsd.org/doc/en/books/porters-handbook/freebsd-versions.html. -var freebsdVersion uint32 - func init() { - freebsdVersion, _ = SysctlUint32("kern.osreldate") conf, _ := Sysctl("kern.conftxt") for i, j := 0, 0; j < len(conf); j++ { if conf[j] != '\n' { diff --git a/src/syscall/route_freebsd_32bit.go b/src/syscall/route_freebsd_32bit.go index ec6f6b7f8b..aed8682237 100644 --- a/src/syscall/route_freebsd_32bit.go +++ b/src/syscall/route_freebsd_32bit.go @@ -22,7 +22,7 @@ func (any *anyMessage) parseInterfaceMessage(b []byte) *InterfaceMessage { // FreeBSD 10 and beyond have a restructured mbuf // packet header view. // See https://svnweb.freebsd.org/base?view=revision&revision=254804. - if freebsdVersion >= 1000000 { + if supportsABI(1000000) { m := (*ifMsghdr)(unsafe.Pointer(any)) p.Header.Data.Hwassist = uint32(m.Data.Hwassist) p.Header.Data.Epoch = m.Data.Epoch diff --git a/src/syscall/syscall_freebsd.go b/src/syscall/syscall_freebsd.go index d5738ba1c1..e118120048 100644 --- a/src/syscall/syscall_freebsd.go +++ b/src/syscall/syscall_freebsd.go @@ -12,7 +12,34 @@ package syscall -import "unsafe" +import ( + "sync" + "unsafe" +) + +const ( + _SYS_FSTAT_FREEBSD12 = 551 // { int fstat(int fd, _Out_ struct stat *sb); } + _SYS_FSTATAT_FREEBSD12 = 552 // { int fstatat(int fd, _In_z_ char *path, \ + _SYS_GETDIRENTRIES_FREEBSD12 = 554 // { ssize_t getdirentries(int fd, \ + _SYS_STATFS_FREEBSD12 = 555 // { int statfs(_In_z_ char *path, \ + _SYS_FSTATFS_FREEBSD12 = 556 // { int fstatfs(int fd, \ + _SYS_GETFSSTAT_FREEBSD12 = 557 // { int getfsstat( \ + _SYS_MKNODAT_FREEBSD12 = 559 // { int mknodat(int fd, _In_z_ char *path, \ +) + +// See https://www.freebsd.org/doc/en_US.ISO8859-1/books/porters-handbook/versions.html. +var ( + osreldateOnce sync.Once + osreldate uint32 +) + +// INO64_FIRST from /usr/src/lib/libc/sys/compat-ino64.h +const _ino64First = 1200031 + +func supportsABI(ver uint32) bool { + osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") }) + return osreldate >= ver +} type SockaddrDatalink struct { Len uint8 @@ -113,17 +140,39 @@ func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) { } func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { - var _p0 unsafe.Pointer - var bufsize uintptr + var ( + _p0 unsafe.Pointer + bufsize uintptr + oldBuf []statfs_freebsd11_t + needsConvert bool + ) + if len(buf) > 0 { - _p0 = unsafe.Pointer(&buf[0]) - bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) + if supportsABI(_ino64First) { + _p0 = unsafe.Pointer(&buf[0]) + bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) + } else { + n := len(buf) + oldBuf = make([]statfs_freebsd11_t, n) + _p0 = unsafe.Pointer(&oldBuf[0]) + bufsize = unsafe.Sizeof(statfs_freebsd11_t{}) * uintptr(n) + needsConvert = true + } } - r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags)) + var sysno uintptr = SYS_GETFSSTAT + if supportsABI(_ino64First) { + sysno = _SYS_GETFSSTAT_FREEBSD12 + } + r0, _, e1 := Syscall(sysno, uintptr(_p0), bufsize, uintptr(flags)) n = int(r0) if e1 != 0 { err = e1 } + if e1 == 0 && needsConvert { + for i := range oldBuf { + buf[i].convertFrom(&oldBuf[i]) + } + } return } @@ -132,6 +181,206 @@ func setattrlistTimes(path string, times []Timespec) error { return ENOSYS } +func Stat(path string, st *Stat_t) (err error) { + var oldStat stat_freebsd11_t + if supportsABI(_ino64First) { + return fstatat_freebsd12(_AT_FDCWD, path, st, 0) + } + err = stat(path, &oldStat) + if err != nil { + return err + } + + st.convertFrom(&oldStat) + return nil +} + +func Lstat(path string, st *Stat_t) (err error) { + var oldStat stat_freebsd11_t + if supportsABI(_ino64First) { + return fstatat_freebsd12(_AT_FDCWD, path, st, _AT_SYMLINK_NOFOLLOW) + } + err = lstat(path, &oldStat) + if err != nil { + return err + } + + st.convertFrom(&oldStat) + return nil +} + +func Fstat(fd int, st *Stat_t) (err error) { + var oldStat stat_freebsd11_t + if supportsABI(_ino64First) { + return fstat_freebsd12(fd, st) + } + err = fstat(fd, &oldStat) + if err != nil { + return err + } + + st.convertFrom(&oldStat) + return nil +} + +func Statfs(path string, stat *Statfs_t) (err error) { + var oldStatfs statfs_freebsd11_t + if supportsABI(_ino64First) { + return statfs_freebsd12(path, stat) + } + err = statfs(path, &oldStatfs) + if err != nil { + return err + } + + stat.convertFrom(&oldStatfs) + return nil +} + +func Fstatfs(fd int, stat *Statfs_t) (err error) { + var oldStatfs statfs_freebsd11_t + if supportsABI(_ino64First) { + return fstatfs_freebsd12(fd, stat) + } + err = fstatfs(fd, &oldStatfs) + if err != nil { + return err + } + + stat.convertFrom(&oldStatfs) + return nil +} + +func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { + if supportsABI(_ino64First) { + return getdirentries_freebsd12(fd, buf, basep) + } + + // The old syscall entries are smaller than the new. Use 1/4 of the original + // buffer size rounded up to DIRBLKSIZ (see /usr/src/lib/libc/sys/getdirentries.c). + oldBufLen := roundup(len(buf)/4, _dirblksiz) + oldBuf := make([]byte, oldBufLen) + n, err = getdirentries(fd, oldBuf, basep) + if err == nil && n > 0 { + n = convertFromDirents11(oldBuf[:n], buf) + } + return +} + +func Mknod(path string, mode uint32, dev uint64) (err error) { + var oldDev int + if supportsABI(_ino64First) { + return mknodat_freebsd12(_AT_FDCWD, path, mode, dev) + } + oldDev = int(dev) + return mknod(path, mode, oldDev) +} + +// round x to the nearest multiple of y, larger or equal to x. +// +// from /usr/include/sys/param.h Macros for counting and rounding. +// #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) +func roundup(x, y int) int { + return ((x + y - 1) / y) * y +} + +func (s *Stat_t) convertFrom(old *stat_freebsd11_t) { + *s = Stat_t{ + Dev: uint64(old.Dev), + Ino: uint64(old.Ino), + Nlink: uint64(old.Nlink), + Mode: old.Mode, + Uid: old.Uid, + Gid: old.Gid, + Rdev: uint64(old.Rdev), + Atim: old.Atim, + Mtim: old.Mtim, + Ctim: old.Ctim, + Birthtim: old.Birthtim, + Size: old.Size, + Blocks: old.Blocks, + Blksize: old.Blksize, + Flags: old.Flags, + Gen: uint64(old.Gen), + } +} + +func (s *Statfs_t) convertFrom(old *statfs_freebsd11_t) { + *s = Statfs_t{ + Version: _statfsVersion, + Type: old.Type, + Flags: old.Flags, + Bsize: old.Bsize, + Iosize: old.Iosize, + Blocks: old.Blocks, + Bfree: old.Bfree, + Bavail: old.Bavail, + Files: old.Files, + Ffree: old.Ffree, + Syncwrites: old.Syncwrites, + Asyncwrites: old.Asyncwrites, + Syncreads: old.Syncreads, + Asyncreads: old.Asyncreads, + // Spare + Namemax: old.Namemax, + Owner: old.Owner, + Fsid: old.Fsid, + // Charspare + // Fstypename + // Mntfromname + // Mntonname + } + + sl := old.Fstypename[:] + n := clen(*(*[]byte)(unsafe.Pointer(&sl))) + copy(s.Fstypename[:], old.Fstypename[:n]) + + sl = old.Mntfromname[:] + n = clen(*(*[]byte)(unsafe.Pointer(&sl))) + copy(s.Mntfromname[:], old.Mntfromname[:n]) + + sl = old.Mntonname[:] + n = clen(*(*[]byte)(unsafe.Pointer(&sl))) + copy(s.Mntonname[:], old.Mntonname[:n]) +} + +func convertFromDirents11(oldBuf []byte, buf []byte) int { + src := unsafe.Pointer(&oldBuf[0]) + esrc := unsafe.Pointer(uintptr(src) + uintptr(len(oldBuf))) + dst := unsafe.Pointer(&buf[0]) + edst := unsafe.Pointer(uintptr(dst) + uintptr(len(buf))) + + for uintptr(src) < uintptr(esrc) && uintptr(dst) < uintptr(edst) { + srcDirent := (*dirent_freebsd11)(src) + dstDirent := (*Dirent)(dst) + + reclen := roundup(int(unsafe.Offsetof(dstDirent.Name)+uintptr(srcDirent.Namlen)+1), 8) + if uintptr(dst)+uintptr(reclen) >= uintptr(edst) { + break + } + + dstDirent.Fileno = uint64(srcDirent.Fileno) + dstDirent.Off = 0 + dstDirent.Reclen = uint16(reclen) + dstDirent.Type = srcDirent.Type + dstDirent.Pad0 = 0 + dstDirent.Namlen = uint16(srcDirent.Namlen) + dstDirent.Pad1 = 0 + + sl := srcDirent.Name[:] + n := clen(*(*[]byte)(unsafe.Pointer(&sl))) + copy(dstDirent.Name[:], srcDirent.Name[:n]) + for i := n; i < int(dstDirent.Namlen); i++ { + dstDirent.Name[i] = 0 + } + + src = unsafe.Pointer(uintptr(src) + uintptr(srcDirent.Reclen)) + dst = unsafe.Pointer(uintptr(dst) + uintptr(reclen)) + } + + return int(uintptr(dst) - uintptr(unsafe.Pointer((&buf[0])))) +} + /* * Exposed directly */ @@ -151,11 +400,15 @@ func setattrlistTimes(path string, times []Timespec) error { //sys Fchown(fd int, uid int, gid int) (err error) //sys Flock(fd int, how int) (err error) //sys Fpathconf(fd int, name int) (val int, err error) -//sys Fstat(fd int, stat *Stat_t) (err error) -//sys Fstatfs(fd int, stat *Statfs_t) (err error) +//sys fstat(fd int, stat *stat_freebsd11_t) (err error) +//sys fstat_freebsd12(fd int, stat *Stat_t) (err error) = _SYS_FSTAT_FREEBSD12 +//sys fstatat_freebsd12(fd int, path string, stat *Stat_t, flags int) (err error) = _SYS_FSTATAT_FREEBSD12 +//sys fstatfs(fd int, stat *statfs_freebsd11_t) (err error) +//sys fstatfs_freebsd12(fd int, stat *Statfs_t) (err error) = _SYS_FSTATFS_FREEBSD12 //sys Fsync(fd int) (err error) //sys Ftruncate(fd int, length int64) (err error) -//sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) +//sys getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) +//sys getdirentries_freebsd12(fd int, buf []byte, basep *uintptr) (n int, err error) = _SYS_GETDIRENTRIES_FREEBSD12 //sys Getdtablesize() (size int) //sysnb Getegid() (egid int) //sysnb Geteuid() (uid int) @@ -176,10 +429,11 @@ func setattrlistTimes(path string, times []Timespec) error { //sys Lchown(path string, uid int, gid int) (err error) //sys Link(path string, link string) (err error) //sys Listen(s int, backlog int) (err error) -//sys Lstat(path string, stat *Stat_t) (err error) +//sys lstat(path string, stat *stat_freebsd11_t) (err error) //sys Mkdir(path string, mode uint32) (err error) //sys Mkfifo(path string, mode uint32) (err error) -//sys Mknod(path string, mode uint32, dev int) (err error) +//sys mknod(path string, mode uint32, dev int) (err error) +//sys mknodat_freebsd12(fd int, path string, mode uint32, dev uint64) (err error) = _SYS_MKNODAT_FREEBSD12 //sys Nanosleep(time *Timespec, leftover *Timespec) (err error) //sys Open(path string, mode int, perm uint32) (fd int, err error) //sys Pathconf(path string, name int) (val int, err error) @@ -204,8 +458,9 @@ func setattrlistTimes(path string, times []Timespec) error { //sysnb Setsid() (pid int, err error) //sysnb Settimeofday(tp *Timeval) (err error) //sysnb Setuid(uid int) (err error) -//sys Stat(path string, stat *Stat_t) (err error) -//sys Statfs(path string, stat *Statfs_t) (err error) +//sys stat(path string, stat *stat_freebsd11_t) (err error) +//sys statfs(path string, stat *statfs_freebsd11_t) (err error) +//sys statfs_freebsd12(path string, stat *Statfs_t) (err error) = _SYS_STATFS_FREEBSD12 //sys Symlink(path string, link string) (err error) //sys Sync() (err error) //sys Truncate(path string, length int64) (err error) diff --git a/src/syscall/types_freebsd.go b/src/syscall/types_freebsd.go index 066a4acbd7..f686021121 100644 --- a/src/syscall/types_freebsd.go +++ b/src/syscall/types_freebsd.go @@ -14,7 +14,11 @@ Input to cgo -godefs. See also mkerrors.sh and mkall.sh package syscall /* -#define KERNEL +#define _WANT_FREEBSD11_STAT 1 +#define _WANT_FREEBSD11_STATFS 1 +#define _WANT_FREEBSD11_DIRENT 1 +#define _WANT_FREEBSD11_KEVENT 1 + #include #include #include @@ -60,50 +64,6 @@ struct sockaddr_any { char pad[sizeof(union sockaddr_all) - sizeof(struct sockaddr)]; }; -// This structure is a duplicate of stat on FreeBSD 8-STABLE. -// See /usr/include/sys/stat.h. -struct stat8 { -#undef st_atimespec st_atim -#undef st_mtimespec st_mtim -#undef st_ctimespec st_ctim -#undef st_birthtimespec st_birthtim - __dev_t st_dev; - ino_t st_ino; - mode_t st_mode; - nlink_t st_nlink; - uid_t st_uid; - gid_t st_gid; - __dev_t st_rdev; -#if __BSD_VISIBLE - struct timespec st_atimespec; - struct timespec st_mtimespec; - struct timespec st_ctimespec; -#else - time_t st_atime; - long __st_atimensec; - time_t st_mtime; - long __st_mtimensec; - time_t st_ctime; - long __st_ctimensec; -#endif - off_t st_size; - blkcnt_t st_blocks; - blksize_t st_blksize; - fflags_t st_flags; - __uint32_t st_gen; - __int32_t st_lspare; -#if __BSD_VISIBLE - struct timespec st_birthtimespec; - unsigned int :(8 / 2) * (16 - (int)sizeof(struct timespec)); - unsigned int :(8 / 2) * (16 - (int)sizeof(struct timespec)); -#else - time_t st_birthtime; - long st_birthtimensec; - unsigned int :(8 / 2) * (16 - (int)sizeof(struct __timespec)); - unsigned int :(8 / 2) * (16 - (int)sizeof(struct __timespec)); -#endif -}; - // This structure is a duplicate of if_data on FreeBSD 8-STABLE. // See /usr/include/net/if.h. struct if_data8 { @@ -130,7 +90,10 @@ struct if_data8 { u_long ifi_iqdrops; u_long ifi_noproto; u_long ifi_hwassist; +// FIXME: these are now unions, so maybe need to change definitions? +#undef ifi_epoch time_t ifi_epoch; +#undef ifi_lastchange struct timeval ifi_lastchange; }; @@ -202,14 +165,25 @@ const ( // Directory mode bits S_IRWXO = C.S_IRWXO ) -type Stat_t C.struct_stat8 +const ( + _statfsVersion = C.STATFS_VERSION + _dirblksiz = C.DIRBLKSIZ +) + +type Stat_t C.struct_stat + +type stat_freebsd11_t C.struct_freebsd11_stat type Statfs_t C.struct_statfs +type statfs_freebsd11_t C.struct_freebsd11_statfs + type Flock_t C.struct_flock type Dirent C.struct_dirent +type dirent_freebsd11 C.struct_freebsd11_dirent + type Fsid C.struct_fsid // File system limits @@ -281,7 +255,7 @@ const ( // Events (kqueue, kevent) -type Kevent_t C.struct_kevent +type Kevent_t C.struct_kevent_freebsd11 // Select @@ -348,7 +322,9 @@ type BpfZbufHeader C.struct_bpf_zbuf_header // Misc const ( - _AT_FDCWD = C.AT_FDCWD + _AT_FDCWD = C.AT_FDCWD + _AT_SYMLINK_FOLLOW = C.AT_SYMLINK_FOLLOW + _AT_SYMLINK_NOFOLLOW = C.AT_SYMLINK_NOFOLLOW ) // Terminal handling diff --git a/src/syscall/zsyscall_freebsd_386.go b/src/syscall/zsyscall_freebsd_386.go index 451da4d6fe..ba7ea27f8d 100644 --- a/src/syscall/zsyscall_freebsd_386.go +++ b/src/syscall/zsyscall_freebsd_386.go @@ -463,7 +463,7 @@ func Fpathconf(fd int, name int) (val int, err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Fstat(fd int, stat *Stat_t) (err error) { +func fstat(fd int, stat *stat_freebsd11_t) (err error) { _, _, e1 := Syscall(SYS_FSTAT, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0) if e1 != 0 { err = errnoErr(e1) @@ -473,7 +473,32 @@ func Fstat(fd int, stat *Stat_t) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Fstatfs(fd int, stat *Statfs_t) (err error) { +func fstat_freebsd12(fd int, stat *Stat_t) (err error) { + _, _, e1 := Syscall(_SYS_FSTAT_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + +func fstatat_freebsd12(fd int, path string, stat *Stat_t, flags int) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := Syscall6(_SYS_FSTATAT_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + +func fstatfs(fd int, stat *statfs_freebsd11_t) (err error) { _, _, e1 := Syscall(SYS_FSTATFS, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0) if e1 != 0 { err = errnoErr(e1) @@ -483,6 +508,16 @@ func Fstatfs(fd int, stat *Statfs_t) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func fstatfs_freebsd12(fd int, stat *Statfs_t) (err error) { + _, _, e1 := Syscall(_SYS_FSTATFS_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fsync(fd int) (err error) { _, _, e1 := Syscall(SYS_FSYNC, uintptr(fd), 0, 0) if e1 != 0 { @@ -503,7 +538,7 @@ func Ftruncate(fd int, length int64) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { +func getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { var _p0 unsafe.Pointer if len(buf) > 0 { _p0 = unsafe.Pointer(&buf[0]) @@ -520,6 +555,23 @@ func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func getdirentries_freebsd12(fd int, buf []byte, basep *uintptr) (n int, err error) { + var _p0 unsafe.Pointer + if len(buf) > 0 { + _p0 = unsafe.Pointer(&buf[0]) + } else { + _p0 = unsafe.Pointer(&_zero) + } + r0, _, e1 := Syscall6(_SYS_GETDIRENTRIES_FREEBSD12, uintptr(fd), uintptr(_p0), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getdtablesize() (size int) { r0, _, _ := Syscall(SYS_GETDTABLESIZE, 0, 0, 0) size = int(r0) @@ -721,7 +773,7 @@ func Listen(s int, backlog int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Lstat(path string, stat *Stat_t) (err error) { +func lstat(path string, stat *stat_freebsd11_t) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) if err != nil { @@ -766,7 +818,7 @@ func Mkfifo(path string, mode uint32) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Mknod(path string, mode uint32, dev int) (err error) { +func mknod(path string, mode uint32, dev int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) if err != nil { @@ -781,6 +833,21 @@ func Mknod(path string, mode uint32, dev int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func mknodat_freebsd12(fd int, path string, mode uint32, dev uint64) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := Syscall6(_SYS_MKNODAT_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev), 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Nanosleep(time *Timespec, leftover *Timespec) (err error) { _, _, e1 := Syscall(SYS_NANOSLEEP, uintptr(unsafe.Pointer(time)), uintptr(unsafe.Pointer(leftover)), 0) if e1 != 0 { @@ -1093,7 +1160,7 @@ func Setuid(uid int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Stat(path string, stat *Stat_t) (err error) { +func stat(path string, stat *stat_freebsd11_t) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) if err != nil { @@ -1108,7 +1175,7 @@ func Stat(path string, stat *Stat_t) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Statfs(path string, stat *Statfs_t) (err error) { +func statfs(path string, stat *statfs_freebsd11_t) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) if err != nil { @@ -1123,6 +1190,21 @@ func Statfs(path string, stat *Statfs_t) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func statfs_freebsd12(path string, stat *Statfs_t) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := Syscall(_SYS_STATFS_FREEBSD12, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Symlink(path string, link string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) diff --git a/src/syscall/zsyscall_freebsd_amd64.go b/src/syscall/zsyscall_freebsd_amd64.go index 0312ca347c..4b519a7f7f 100644 --- a/src/syscall/zsyscall_freebsd_amd64.go +++ b/src/syscall/zsyscall_freebsd_amd64.go @@ -463,7 +463,7 @@ func Fpathconf(fd int, name int) (val int, err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Fstat(fd int, stat *Stat_t) (err error) { +func fstat(fd int, stat *stat_freebsd11_t) (err error) { _, _, e1 := Syscall(SYS_FSTAT, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0) if e1 != 0 { err = errnoErr(e1) @@ -473,7 +473,32 @@ func Fstat(fd int, stat *Stat_t) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Fstatfs(fd int, stat *Statfs_t) (err error) { +func fstat_freebsd12(fd int, stat *Stat_t) (err error) { + _, _, e1 := Syscall(_SYS_FSTAT_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + +func fstatat_freebsd12(fd int, path string, stat *Stat_t, flags int) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := Syscall6(_SYS_FSTATAT_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + +func fstatfs(fd int, stat *statfs_freebsd11_t) (err error) { _, _, e1 := Syscall(SYS_FSTATFS, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0) if e1 != 0 { err = errnoErr(e1) @@ -483,6 +508,16 @@ func Fstatfs(fd int, stat *Statfs_t) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func fstatfs_freebsd12(fd int, stat *Statfs_t) (err error) { + _, _, e1 := Syscall(_SYS_FSTATFS_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fsync(fd int) (err error) { _, _, e1 := Syscall(SYS_FSYNC, uintptr(fd), 0, 0) if e1 != 0 { @@ -503,7 +538,7 @@ func Ftruncate(fd int, length int64) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { +func getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { var _p0 unsafe.Pointer if len(buf) > 0 { _p0 = unsafe.Pointer(&buf[0]) @@ -520,6 +555,23 @@ func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func getdirentries_freebsd12(fd int, buf []byte, basep *uintptr) (n int, err error) { + var _p0 unsafe.Pointer + if len(buf) > 0 { + _p0 = unsafe.Pointer(&buf[0]) + } else { + _p0 = unsafe.Pointer(&_zero) + } + r0, _, e1 := Syscall6(_SYS_GETDIRENTRIES_FREEBSD12, uintptr(fd), uintptr(_p0), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getdtablesize() (size int) { r0, _, _ := Syscall(SYS_GETDTABLESIZE, 0, 0, 0) size = int(r0) @@ -721,7 +773,7 @@ func Listen(s int, backlog int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Lstat(path string, stat *Stat_t) (err error) { +func lstat(path string, stat *stat_freebsd11_t) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) if err != nil { @@ -766,7 +818,7 @@ func Mkfifo(path string, mode uint32) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Mknod(path string, mode uint32, dev int) (err error) { +func mknod(path string, mode uint32, dev int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) if err != nil { @@ -781,6 +833,21 @@ func Mknod(path string, mode uint32, dev int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func mknodat_freebsd12(fd int, path string, mode uint32, dev uint64) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := Syscall6(_SYS_MKNODAT_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev), 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Nanosleep(time *Timespec, leftover *Timespec) (err error) { _, _, e1 := Syscall(SYS_NANOSLEEP, uintptr(unsafe.Pointer(time)), uintptr(unsafe.Pointer(leftover)), 0) if e1 != 0 { @@ -1093,7 +1160,7 @@ func Setuid(uid int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Stat(path string, stat *Stat_t) (err error) { +func stat(path string, stat *stat_freebsd11_t) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) if err != nil { @@ -1108,7 +1175,7 @@ func Stat(path string, stat *Stat_t) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Statfs(path string, stat *Statfs_t) (err error) { +func statfs(path string, stat *statfs_freebsd11_t) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) if err != nil { @@ -1123,6 +1190,21 @@ func Statfs(path string, stat *Statfs_t) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func statfs_freebsd12(path string, stat *Statfs_t) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := Syscall(_SYS_STATFS_FREEBSD12, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Symlink(path string, link string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) diff --git a/src/syscall/zsyscall_freebsd_arm.go b/src/syscall/zsyscall_freebsd_arm.go index fcb0733774..e89707654b 100644 --- a/src/syscall/zsyscall_freebsd_arm.go +++ b/src/syscall/zsyscall_freebsd_arm.go @@ -463,7 +463,7 @@ func Fpathconf(fd int, name int) (val int, err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Fstat(fd int, stat *Stat_t) (err error) { +func fstat(fd int, stat *stat_freebsd11_t) (err error) { _, _, e1 := Syscall(SYS_FSTAT, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0) if e1 != 0 { err = errnoErr(e1) @@ -473,7 +473,32 @@ func Fstat(fd int, stat *Stat_t) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Fstatfs(fd int, stat *Statfs_t) (err error) { +func fstat_freebsd12(fd int, stat *Stat_t) (err error) { + _, _, e1 := Syscall(_SYS_FSTAT_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + +func fstatat_freebsd12(fd int, path string, stat *Stat_t, flags int) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := Syscall6(_SYS_FSTATAT_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), uintptr(flags), 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + +func fstatfs(fd int, stat *statfs_freebsd11_t) (err error) { _, _, e1 := Syscall(SYS_FSTATFS, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0) if e1 != 0 { err = errnoErr(e1) @@ -483,6 +508,16 @@ func Fstatfs(fd int, stat *Statfs_t) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func fstatfs_freebsd12(fd int, stat *Statfs_t) (err error) { + _, _, e1 := Syscall(_SYS_FSTATFS_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fsync(fd int) (err error) { _, _, e1 := Syscall(SYS_FSYNC, uintptr(fd), 0, 0) if e1 != 0 { @@ -503,7 +538,7 @@ func Ftruncate(fd int, length int64) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { +func getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { var _p0 unsafe.Pointer if len(buf) > 0 { _p0 = unsafe.Pointer(&buf[0]) @@ -520,6 +555,23 @@ func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func getdirentries_freebsd12(fd int, buf []byte, basep *uintptr) (n int, err error) { + var _p0 unsafe.Pointer + if len(buf) > 0 { + _p0 = unsafe.Pointer(&buf[0]) + } else { + _p0 = unsafe.Pointer(&_zero) + } + r0, _, e1 := Syscall6(_SYS_GETDIRENTRIES_FREEBSD12, uintptr(fd), uintptr(_p0), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getdtablesize() (size int) { r0, _, _ := Syscall(SYS_GETDTABLESIZE, 0, 0, 0) size = int(r0) @@ -721,7 +773,7 @@ func Listen(s int, backlog int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Lstat(path string, stat *Stat_t) (err error) { +func lstat(path string, stat *stat_freebsd11_t) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) if err != nil { @@ -766,7 +818,7 @@ func Mkfifo(path string, mode uint32) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Mknod(path string, mode uint32, dev int) (err error) { +func mknod(path string, mode uint32, dev int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) if err != nil { @@ -781,6 +833,21 @@ func Mknod(path string, mode uint32, dev int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func mknodat_freebsd12(fd int, path string, mode uint32, dev uint64) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := Syscall6(_SYS_MKNODAT_FREEBSD12, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev), 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Nanosleep(time *Timespec, leftover *Timespec) (err error) { _, _, e1 := Syscall(SYS_NANOSLEEP, uintptr(unsafe.Pointer(time)), uintptr(unsafe.Pointer(leftover)), 0) if e1 != 0 { @@ -1093,7 +1160,7 @@ func Setuid(uid int) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Stat(path string, stat *Stat_t) (err error) { +func stat(path string, stat *stat_freebsd11_t) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) if err != nil { @@ -1108,7 +1175,7 @@ func Stat(path string, stat *Stat_t) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT -func Statfs(path string, stat *Statfs_t) (err error) { +func statfs(path string, stat *statfs_freebsd11_t) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) if err != nil { @@ -1123,6 +1190,21 @@ func Statfs(path string, stat *Statfs_t) (err error) { // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT +func statfs_freebsd12(path string, stat *Statfs_t) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := Syscall(_SYS_STATFS_FREEBSD12, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Symlink(path string, link string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) diff --git a/src/syscall/ztypes_freebsd_386.go b/src/syscall/ztypes_freebsd_386.go index 242a73d1de..3ca31f2872 100644 --- a/src/syscall/ztypes_freebsd_386.go +++ b/src/syscall/ztypes_freebsd_386.go @@ -1,5 +1,5 @@ -// Created by cgo -godefs - DO NOT EDIT -// cgo -godefs types_freebsd.go +// Code generated by cmd/cgo -godefs; DO NOT EDIT. +// cgo -godefs types_freebsd.go | go run mkpost.go // +build 386,freebsd @@ -75,28 +75,84 @@ const ( S_IRWXO = 0x7 ) +const ( + _statfsVersion = 0x20140518 + _dirblksiz = 0x400 +) + type Stat_t struct { - Dev uint32 - Ino uint32 - Mode uint16 - Nlink uint16 - Uid uint32 - Gid uint32 - Rdev uint32 - Atimespec Timespec - Mtimespec Timespec - Ctimespec Timespec - Size int64 - Blocks int64 - Blksize uint32 - Flags uint32 - Gen uint32 - Lspare int32 - Birthtimespec Timespec - Pad_cgo_0 [8]byte + Dev uint64 + Ino uint64 + Nlink uint64 + Mode uint16 + Padding0 int16 + Uid uint32 + Gid uint32 + Padding1 int32 + Rdev uint64 + Atim_ext int32 + Atim Timespec + Mtim_ext int32 + Mtim Timespec + Ctim_ext int32 + Ctim Timespec + Btim_ext int32 + Birthtim Timespec + Size int64 + Blocks int64 + Blksize int32 + Flags uint32 + Gen uint64 + Spare [10]uint64 +} + +type stat_freebsd11_t struct { + Dev uint32 + Ino uint32 + Mode uint16 + Nlink uint16 + Uid uint32 + Gid uint32 + Rdev uint32 + Atim Timespec + Mtim Timespec + Ctim Timespec + Size int64 + Blocks int64 + Blksize int32 + Flags uint32 + Gen uint32 + Lspare int32 + Birthtim Timespec + Pad_cgo_0 [8]byte } type Statfs_t struct { + Version uint32 + Type uint32 + Flags uint64 + Bsize uint64 + Iosize uint64 + Blocks uint64 + Bfree uint64 + Bavail int64 + Files uint64 + Ffree int64 + Syncwrites uint64 + Asyncwrites uint64 + Syncreads uint64 + Asyncreads uint64 + Spare [10]uint64 + Namemax uint32 + Owner uint32 + Fsid Fsid + Charspare [80]int8 + Fstypename [16]int8 + Mntfromname [1024]int8 + Mntonname [1024]int8 +} + +type statfs_freebsd11_t struct { Version uint32 Type uint32 Flags uint64 @@ -131,6 +187,17 @@ type Flock_t struct { } type Dirent struct { + Fileno uint64 + Off int64 + Reclen uint16 + Type uint8 + Pad0 uint8 + Namlen uint16 + Pad1 uint16 + Name [256]int8 +} + +type dirent_freebsd11 struct { Fileno uint32 Reclen uint16 Type uint8 @@ -490,7 +557,9 @@ type BpfZbufHeader struct { } const ( - _AT_FDCWD = -0x64 + _AT_FDCWD = -0x64 + _AT_SYMLINK_FOLLOW = 0x400 + _AT_SYMLINK_NOFOLLOW = 0x200 ) type Termios struct { diff --git a/src/syscall/ztypes_freebsd_amd64.go b/src/syscall/ztypes_freebsd_amd64.go index 8b34cde2ee..797a3bab08 100644 --- a/src/syscall/ztypes_freebsd_amd64.go +++ b/src/syscall/ztypes_freebsd_amd64.go @@ -1,5 +1,5 @@ -// Created by cgo -godefs - DO NOT EDIT -// cgo -godefs types_freebsd.go +// Code generated by cmd/cgo -godefs; DO NOT EDIT. +// cgo -godefs types_freebsd.go | go run mkpost.go // +build amd64,freebsd @@ -75,27 +75,79 @@ const ( S_IRWXO = 0x7 ) +const ( + _statfsVersion = 0x20140518 + _dirblksiz = 0x400 +) + type Stat_t struct { - Dev uint32 - Ino uint32 - Mode uint16 - Nlink uint16 - Uid uint32 - Gid uint32 - Rdev uint32 - Atimespec Timespec - Mtimespec Timespec - Ctimespec Timespec - Size int64 - Blocks int64 - Blksize uint32 - Flags uint32 - Gen uint32 - Lspare int32 - Birthtimespec Timespec + Dev uint64 + Ino uint64 + Nlink uint64 + Mode uint16 + Padding0 int16 + Uid uint32 + Gid uint32 + Padding1 int32 + Rdev uint64 + Atim Timespec + Mtim Timespec + Ctim Timespec + Birthtim Timespec + Size int64 + Blocks int64 + Blksize int32 + Flags uint32 + Gen uint64 + Spare [10]uint64 +} + +type stat_freebsd11_t struct { + Dev uint32 + Ino uint32 + Mode uint16 + Nlink uint16 + Uid uint32 + Gid uint32 + Rdev uint32 + Atim Timespec + Mtim Timespec + Ctim Timespec + Size int64 + Blocks int64 + Blksize int32 + Flags uint32 + Gen uint32 + Lspare int32 + Birthtim Timespec } type Statfs_t struct { + Version uint32 + Type uint32 + Flags uint64 + Bsize uint64 + Iosize uint64 + Blocks uint64 + Bfree uint64 + Bavail int64 + Files uint64 + Ffree int64 + Syncwrites uint64 + Asyncwrites uint64 + Syncreads uint64 + Asyncreads uint64 + Spare [10]uint64 + Namemax uint32 + Owner uint32 + Fsid Fsid + Charspare [80]int8 + Fstypename [16]int8 + Mntfromname [1024]int8 + Mntonname [1024]int8 +} + +type statfs_freebsd11_t struct { Version uint32 Type uint32 Flags uint64 @@ -131,6 +183,17 @@ type Flock_t struct { } type Dirent struct { + Fileno uint64 + Off int64 + Reclen uint16 + Type uint8 + Pad0 uint8 + Namlen uint16 + Pad1 uint16 + Name [256]int8 +} + +type dirent_freebsd11 struct { Fileno uint32 Reclen uint16 Type uint8 @@ -493,7 +556,9 @@ type BpfZbufHeader struct { } const ( - _AT_FDCWD = -0x64 + _AT_FDCWD = -0x64 + _AT_SYMLINK_FOLLOW = 0x400 + _AT_SYMLINK_NOFOLLOW = 0x200 ) type Termios struct { diff --git a/src/syscall/ztypes_freebsd_arm.go b/src/syscall/ztypes_freebsd_arm.go index 4fd6bd509c..9be8752e18 100644 --- a/src/syscall/ztypes_freebsd_arm.go +++ b/src/syscall/ztypes_freebsd_arm.go @@ -1,4 +1,4 @@ -// Created by cgo -godefs - DO NOT EDIT +// Code generated by cmd/cgo -godefs; DO NOT EDIT. // cgo -godefs -- -fsigned-char types_freebsd.go // +build arm,freebsd @@ -77,27 +77,79 @@ const ( S_IRWXO = 0x7 ) +const ( + _statfsVersion = 0x20140518 + _dirblksiz = 0x400 +) + type Stat_t struct { - Dev uint32 - Ino uint32 - Mode uint16 - Nlink uint16 - Uid uint32 - Gid uint32 - Rdev uint32 - Atimespec Timespec - Mtimespec Timespec - Ctimespec Timespec - Size int64 - Blocks int64 - Blksize uint32 - Flags uint32 - Gen uint32 - Lspare int32 - Birthtimespec Timespec + Dev uint64 + Ino uint64 + Nlink uint64 + Mode uint16 + Padding0 int16 + Uid uint32 + Gid uint32 + Padding1 int32 + Rdev uint64 + Atim Timespec + Mtim Timespec + Ctim Timespec + Birthtim Timespec + Size int64 + Blocks int64 + Blksize int32 + Flags uint32 + Gen uint64 + Spare [10]uint64 +} + +type stat_freebsd11_t struct { + Dev uint32 + Ino uint32 + Mode uint16 + Nlink uint16 + Uid uint32 + Gid uint32 + Rdev uint32 + Atim Timespec + Mtim Timespec + Ctim Timespec + Size int64 + Blocks int64 + Blksize int32 + Flags uint32 + Gen uint32 + Lspare int32 + Birthtim Timespec } type Statfs_t struct { + Version uint32 + Type uint32 + Flags uint64 + Bsize uint64 + Iosize uint64 + Blocks uint64 + Bfree uint64 + Bavail int64 + Files uint64 + Ffree int64 + Syncwrites uint64 + Asyncwrites uint64 + Syncreads uint64 + Asyncreads uint64 + Spare [10]uint64 + Namemax uint32 + Owner uint32 + Fsid Fsid + Charspare [80]int8 + Fstypename [16]int8 + Mntfromname [1024]int8 + Mntonname [1024]int8 +} + +type statfs_freebsd11_t struct { Version uint32 Type uint32 Flags uint64 @@ -133,6 +185,17 @@ type Flock_t struct { } type Dirent struct { + Fileno uint64 + Off int64 + Reclen uint16 + Type uint8 + Pad0 uint8 + Namlen uint16 + Pad1 uint16 + Name [256]int8 +} + +type dirent_freebsd11 struct { Fileno uint32 Reclen uint16 Type uint8 @@ -493,7 +556,9 @@ type BpfZbufHeader struct { } const ( - _AT_FDCWD = -0x64 + _AT_FDCWD = -0x64 + _AT_SYMLINK_FOLLOW = 0x400 + _AT_SYMLINK_NOFOLLOW = 0x200 ) type Termios struct { From 9d907160d46ee56169b910673c0a934a0422cd73 Mon Sep 17 00:00:00 2001 From: Mikio Hara Date: Fri, 5 Oct 2018 08:28:20 +0900 Subject: [PATCH 033/240] vendor: update golang_org/x/net/route from upstream Updates the route package to git rev 146acd2 for: - 146acd2 don't run NET_RT_IFLIST vs. NET_RT_IFLISTL test in 386 emulation (again) Change-Id: I24de1eb31b2ca0e24cb9ab1648f7a71b5067cf97 Reviewed-on: https://go-review.googlesource.com/c/139937 Reviewed-by: Ian Lance Taylor --- .../x/net/route/message_freebsd_test.go | 8 ++------ .../golang_org/x/net/route/sys_freebsd.go | 17 +++++++++++------ 2 files changed, 13 insertions(+), 12 deletions(-) diff --git a/src/vendor/golang_org/x/net/route/message_freebsd_test.go b/src/vendor/golang_org/x/net/route/message_freebsd_test.go index db4b56752c..c6d8a5f54c 100644 --- a/src/vendor/golang_org/x/net/route/message_freebsd_test.go +++ b/src/vendor/golang_org/x/net/route/message_freebsd_test.go @@ -4,10 +4,7 @@ package route -import ( - "testing" - "unsafe" -) +import "testing" func TestFetchAndParseRIBOnFreeBSD(t *testing.T) { for _, typ := range []RIBType{sysNET_RT_IFMALIST} { @@ -40,8 +37,7 @@ func TestFetchAndParseRIBOnFreeBSD10AndAbove(t *testing.T) { if _, err := FetchRIB(sysAF_UNSPEC, sysNET_RT_IFLISTL, 0); err != nil { t.Skip("NET_RT_IFLISTL not supported") } - var p uintptr - if kernelAlign != int(unsafe.Sizeof(p)) { + if compatFreeBSD32 { t.Skip("NET_RT_IFLIST vs. NET_RT_IFLISTL doesn't work for 386 emulation on amd64") } diff --git a/src/vendor/golang_org/x/net/route/sys_freebsd.go b/src/vendor/golang_org/x/net/route/sys_freebsd.go index a1a0d79b61..fe91be1249 100644 --- a/src/vendor/golang_org/x/net/route/sys_freebsd.go +++ b/src/vendor/golang_org/x/net/route/sys_freebsd.go @@ -54,6 +54,8 @@ func (m *InterfaceMessage) Sys() []Sys { } } +var compatFreeBSD32 bool // 386 emulation on amd64 + func probeRoutingStack() (int, map[int]*wireFormat) { var p uintptr wordSize := int(unsafe.Sizeof(p)) @@ -83,8 +85,11 @@ func probeRoutingStack() (int, map[int]*wireFormat) { break } } + if align != wordSize { + compatFreeBSD32 = true // 386 emulation on amd64 + } var rtm, ifm, ifam, ifmam, ifanm *wireFormat - if align != wordSize { // 386 emulation on amd64 + if compatFreeBSD32 { rtm = &wireFormat{extOff: sizeofRtMsghdrFreeBSD10Emu - sizeofRtMetricsFreeBSD10Emu, bodyOff: sizeofRtMsghdrFreeBSD10Emu} ifm = &wireFormat{extOff: 16} ifam = &wireFormat{extOff: sizeofIfaMsghdrFreeBSD10Emu, bodyOff: sizeofIfaMsghdrFreeBSD10Emu} @@ -100,31 +105,31 @@ func probeRoutingStack() (int, map[int]*wireFormat) { rel, _ := syscall.SysctlUint32("kern.osreldate") switch { case rel < 800000: - if align != wordSize { // 386 emulation on amd64 + if compatFreeBSD32 { ifm.bodyOff = sizeofIfMsghdrFreeBSD7Emu } else { ifm.bodyOff = sizeofIfMsghdrFreeBSD7 } case 800000 <= rel && rel < 900000: - if align != wordSize { // 386 emulation on amd64 + if compatFreeBSD32 { ifm.bodyOff = sizeofIfMsghdrFreeBSD8Emu } else { ifm.bodyOff = sizeofIfMsghdrFreeBSD8 } case 900000 <= rel && rel < 1000000: - if align != wordSize { // 386 emulation on amd64 + if compatFreeBSD32 { ifm.bodyOff = sizeofIfMsghdrFreeBSD9Emu } else { ifm.bodyOff = sizeofIfMsghdrFreeBSD9 } case 1000000 <= rel && rel < 1100000: - if align != wordSize { // 386 emulation on amd64 + if compatFreeBSD32 { ifm.bodyOff = sizeofIfMsghdrFreeBSD10Emu } else { ifm.bodyOff = sizeofIfMsghdrFreeBSD10 } default: - if align != wordSize { // 386 emulation on amd64 + if compatFreeBSD32 { ifm.bodyOff = sizeofIfMsghdrFreeBSD11Emu } else { ifm.bodyOff = sizeofIfMsghdrFreeBSD11 From 430b9cb92f1291f2bef3c99d21925b3204cead90 Mon Sep 17 00:00:00 2001 From: Alberto Donizetti Date: Fri, 5 Oct 2018 18:22:06 +0000 Subject: [PATCH 034/240] runtime: revert "skip TestLldbPython when lldb is too old" This reverts commit d2170040617231a26ab0722d093ecb19e2ba8302. Reason for revert: It broke all the darwin builders; it's also not obvious how the weird darwin versions (900, 1000) relate to the > 3.9 requisite, so I'm not sure how to decide about skipping in a robust way. It's better to revert the check for now. Fixes #28028 Change-Id: Ibbcb7bf7cd2136e0851ebd097a2bc4dec9f0ee18 Reviewed-on: https://go-review.googlesource.com/c/140217 Reviewed-by: Keith Randall --- src/runtime/runtime-lldb_test.go | 23 ----------------------- 1 file changed, 23 deletions(-) diff --git a/src/runtime/runtime-lldb_test.go b/src/runtime/runtime-lldb_test.go index c74e6ef029..fe3a0eb90d 100644 --- a/src/runtime/runtime-lldb_test.go +++ b/src/runtime/runtime-lldb_test.go @@ -10,9 +10,7 @@ import ( "os" "os/exec" "path/filepath" - "regexp" "runtime" - "strconv" "strings" "testing" ) @@ -27,27 +25,6 @@ func checkLldbPython(t *testing.T) { } lldbPath = strings.TrimSpace(string(out)) - // Check lldb version. The test is known to fail with 3.8 or older - // (see Issue #22299). - cmd = exec.Command("lldb", "--version") - out, err = cmd.CombinedOutput() - - // lldb --version should print "lldb version a.b.c" - re := regexp.MustCompile(` ([[:digit:]]+)\.([[:digit:]]+)`) - lldbVersion := re.FindStringSubmatch(string(out)) - if len(lldbVersion) != 3 { - t.Errorf("bad lldb --version output: %s", out) - } - major, err1 := strconv.Atoi(lldbVersion[1]) - minor, err2 := strconv.Atoi(lldbVersion[2]) - if err1 != nil || err2 != nil { - t.Errorf("bad lldb --version output: %s", out) - } - - if (major < 3) || (major == 3 && minor < 9) { - t.Skipf("skipping because lldb version %v.%v is too old (need >= 3.9)", major, minor) - } - cmd = exec.Command("/usr/bin/python2.7", "-c", "import sys;sys.path.append(sys.argv[1]);import lldb; print('go lldb python support')", lldbPath) out, err = cmd.CombinedOutput() From 7b8b3f30edde4ec93b91e62d2d6442dff7360056 Mon Sep 17 00:00:00 2001 From: Ben Shi Date: Fri, 5 Oct 2018 12:09:43 +0000 Subject: [PATCH 035/240] cmd/compile: combine similar code in 386's assembly generator The indexed MOVload and MOVstore have similar logic, and this CL combine them together. The total size of pkg/linux_386/cmd/compile/ decreases about 4KB. Change-Id: I06236a3542aaa3dfc113c49fe4c69d209e018dfe Reviewed-on: https://go-review.googlesource.com/c/139958 Run-TryBot: Ben Shi TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/cmd/compile/internal/x86/ssa.go | 94 +++++++++-------------------- 1 file changed, 30 insertions(+), 64 deletions(-) diff --git a/src/cmd/compile/internal/x86/ssa.go b/src/cmd/compile/internal/x86/ssa.go index e0bb4418ec..8f8ee75eec 100644 --- a/src/cmd/compile/internal/x86/ssa.go +++ b/src/cmd/compile/internal/x86/ssa.go @@ -484,43 +484,26 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { gc.AddAux(&p.From, v) p.To.Type = obj.TYPE_REG p.To.Reg = v.Reg() - case ssa.Op386MOVSDloadidx8: - p := s.Prog(v.Op.Asm()) - p.From.Type = obj.TYPE_MEM - p.From.Reg = v.Args[0].Reg() - gc.AddAux(&p.From, v) - p.From.Scale = 8 - p.From.Index = v.Args[1].Reg() - p.To.Type = obj.TYPE_REG - p.To.Reg = v.Reg() - case ssa.Op386MOVLloadidx4, ssa.Op386MOVSSloadidx4: - p := s.Prog(v.Op.Asm()) - p.From.Type = obj.TYPE_MEM - p.From.Reg = v.Args[0].Reg() - gc.AddAux(&p.From, v) - p.From.Scale = 4 - p.From.Index = v.Args[1].Reg() - p.To.Type = obj.TYPE_REG - p.To.Reg = v.Reg() - case ssa.Op386MOVWloadidx2: - p := s.Prog(v.Op.Asm()) - p.From.Type = obj.TYPE_MEM - p.From.Reg = v.Args[0].Reg() - gc.AddAux(&p.From, v) - p.From.Scale = 2 - p.From.Index = v.Args[1].Reg() - p.To.Type = obj.TYPE_REG - p.To.Reg = v.Reg() - case ssa.Op386MOVBloadidx1, ssa.Op386MOVWloadidx1, ssa.Op386MOVLloadidx1, ssa.Op386MOVSSloadidx1, ssa.Op386MOVSDloadidx1: + case ssa.Op386MOVBloadidx1, ssa.Op386MOVWloadidx1, ssa.Op386MOVLloadidx1, ssa.Op386MOVSSloadidx1, ssa.Op386MOVSDloadidx1, + ssa.Op386MOVSDloadidx8, ssa.Op386MOVLloadidx4, ssa.Op386MOVSSloadidx4, ssa.Op386MOVWloadidx2: r := v.Args[0].Reg() i := v.Args[1].Reg() - if i == x86.REG_SP { - r, i = i, r - } p := s.Prog(v.Op.Asm()) p.From.Type = obj.TYPE_MEM + switch v.Op { + case ssa.Op386MOVBloadidx1, ssa.Op386MOVWloadidx1, ssa.Op386MOVLloadidx1, ssa.Op386MOVSSloadidx1, ssa.Op386MOVSDloadidx1: + if i == x86.REG_SP { + r, i = i, r + } + p.From.Scale = 1 + case ssa.Op386MOVSDloadidx8: + p.From.Scale = 8 + case ssa.Op386MOVLloadidx4, ssa.Op386MOVSSloadidx4: + p.From.Scale = 4 + case ssa.Op386MOVWloadidx2: + p.From.Scale = 2 + } p.From.Reg = r - p.From.Scale = 1 p.From.Index = i gc.AddAux(&p.From, v) p.To.Type = obj.TYPE_REG @@ -573,45 +556,28 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { p.To.Type = obj.TYPE_MEM p.To.Reg = v.Args[0].Reg() gc.AddAux2(&p.To, v, off) - case ssa.Op386MOVSDstoreidx8: - p := s.Prog(v.Op.Asm()) - p.From.Type = obj.TYPE_REG - p.From.Reg = v.Args[2].Reg() - p.To.Type = obj.TYPE_MEM - p.To.Reg = v.Args[0].Reg() - p.To.Scale = 8 - p.To.Index = v.Args[1].Reg() - gc.AddAux(&p.To, v) - case ssa.Op386MOVSSstoreidx4, ssa.Op386MOVLstoreidx4: - p := s.Prog(v.Op.Asm()) - p.From.Type = obj.TYPE_REG - p.From.Reg = v.Args[2].Reg() - p.To.Type = obj.TYPE_MEM - p.To.Reg = v.Args[0].Reg() - p.To.Scale = 4 - p.To.Index = v.Args[1].Reg() - gc.AddAux(&p.To, v) - case ssa.Op386MOVWstoreidx2: - p := s.Prog(v.Op.Asm()) - p.From.Type = obj.TYPE_REG - p.From.Reg = v.Args[2].Reg() - p.To.Type = obj.TYPE_MEM - p.To.Reg = v.Args[0].Reg() - p.To.Scale = 2 - p.To.Index = v.Args[1].Reg() - gc.AddAux(&p.To, v) - case ssa.Op386MOVBstoreidx1, ssa.Op386MOVWstoreidx1, ssa.Op386MOVLstoreidx1, ssa.Op386MOVSSstoreidx1, ssa.Op386MOVSDstoreidx1: + case ssa.Op386MOVBstoreidx1, ssa.Op386MOVWstoreidx1, ssa.Op386MOVLstoreidx1, ssa.Op386MOVSSstoreidx1, ssa.Op386MOVSDstoreidx1, + ssa.Op386MOVSDstoreidx8, ssa.Op386MOVSSstoreidx4, ssa.Op386MOVLstoreidx4, ssa.Op386MOVWstoreidx2: r := v.Args[0].Reg() i := v.Args[1].Reg() - if i == x86.REG_SP { - r, i = i, r - } p := s.Prog(v.Op.Asm()) p.From.Type = obj.TYPE_REG p.From.Reg = v.Args[2].Reg() p.To.Type = obj.TYPE_MEM + switch v.Op { + case ssa.Op386MOVBstoreidx1, ssa.Op386MOVWstoreidx1, ssa.Op386MOVLstoreidx1, ssa.Op386MOVSSstoreidx1, ssa.Op386MOVSDstoreidx1: + if i == x86.REG_SP { + r, i = i, r + } + p.To.Scale = 1 + case ssa.Op386MOVSDstoreidx8: + p.To.Scale = 8 + case ssa.Op386MOVSSstoreidx4, ssa.Op386MOVLstoreidx4: + p.To.Scale = 4 + case ssa.Op386MOVWstoreidx2: + p.To.Scale = 2 + } p.To.Reg = r - p.To.Scale = 1 p.To.Index = i gc.AddAux(&p.To, v) case ssa.Op386MOVLstoreconst, ssa.Op386MOVWstoreconst, ssa.Op386MOVBstoreconst: From 30c1ed7d0bd4a7bdb544bf8c190668d647b4faac Mon Sep 17 00:00:00 2001 From: Ben Shi Date: Fri, 5 Oct 2018 03:19:03 +0000 Subject: [PATCH 036/240] cmd/compile: simplify 386's rules This CL combines several rules together via regular expression, but won't impact generated 386 code. Change-Id: I354006fe801fc952e3a9431cae63229922c9ba48 Reviewed-on: https://go-review.googlesource.com/c/139957 Run-TryBot: Ben Shi TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/cmd/compile/internal/ssa/gen/386.rules | 118 +++++---------------- 1 file changed, 28 insertions(+), 90 deletions(-) diff --git a/src/cmd/compile/internal/ssa/gen/386.rules b/src/cmd/compile/internal/ssa/gen/386.rules index f6aa37e884..83c469024c 100644 --- a/src/cmd/compile/internal/ssa/gen/386.rules +++ b/src/cmd/compile/internal/ssa/gen/386.rules @@ -721,41 +721,21 @@ (MOVBstoreconst [ValAndOff(sc).add(off)] {mergeSym(sym1, sym2)} ptr mem) // generating indexed loads and stores -(MOVBload [off1] {sym1} (LEAL1 [off2] {sym2} ptr idx) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> - (MOVBloadidx1 [off1+off2] {mergeSym(sym1,sym2)} ptr idx mem) -(MOVWload [off1] {sym1} (LEAL1 [off2] {sym2} ptr idx) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> - (MOVWloadidx1 [off1+off2] {mergeSym(sym1,sym2)} ptr idx mem) +(MOV(B|W|L|SS|SD)load [off1] {sym1} (LEAL1 [off2] {sym2} ptr idx) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> + (MOV(B|W|L|SS|SD)loadidx1 [off1+off2] {mergeSym(sym1,sym2)} ptr idx mem) (MOVWload [off1] {sym1} (LEAL2 [off2] {sym2} ptr idx) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> (MOVWloadidx2 [off1+off2] {mergeSym(sym1,sym2)} ptr idx mem) -(MOVLload [off1] {sym1} (LEAL1 [off2] {sym2} ptr idx) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> - (MOVLloadidx1 [off1+off2] {mergeSym(sym1,sym2)} ptr idx mem) -(MOVLload [off1] {sym1} (LEAL4 [off2] {sym2} ptr idx) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> - (MOVLloadidx4 [off1+off2] {mergeSym(sym1,sym2)} ptr idx mem) -(MOVSSload [off1] {sym1} (LEAL1 [off2] {sym2} ptr idx) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> - (MOVSSloadidx1 [off1+off2] {mergeSym(sym1,sym2)} ptr idx mem) -(MOVSSload [off1] {sym1} (LEAL4 [off2] {sym2} ptr idx) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> - (MOVSSloadidx4 [off1+off2] {mergeSym(sym1,sym2)} ptr idx mem) -(MOVSDload [off1] {sym1} (LEAL1 [off2] {sym2} ptr idx) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> - (MOVSDloadidx1 [off1+off2] {mergeSym(sym1,sym2)} ptr idx mem) +(MOV(L|SS)load [off1] {sym1} (LEAL4 [off2] {sym2} ptr idx) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> + (MOV(L|SS)loadidx4 [off1+off2] {mergeSym(sym1,sym2)} ptr idx mem) (MOVSDload [off1] {sym1} (LEAL8 [off2] {sym2} ptr idx) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> (MOVSDloadidx8 [off1+off2] {mergeSym(sym1,sym2)} ptr idx mem) -(MOVBstore [off1] {sym1} (LEAL1 [off2] {sym2} ptr idx) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> - (MOVBstoreidx1 [off1+off2] {mergeSym(sym1,sym2)} ptr idx val mem) -(MOVWstore [off1] {sym1} (LEAL1 [off2] {sym2} ptr idx) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> - (MOVWstoreidx1 [off1+off2] {mergeSym(sym1,sym2)} ptr idx val mem) +(MOV(B|W|L|SS|SD)store [off1] {sym1} (LEAL1 [off2] {sym2} ptr idx) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> + (MOV(B|W|L|SS|SD)storeidx1 [off1+off2] {mergeSym(sym1,sym2)} ptr idx val mem) (MOVWstore [off1] {sym1} (LEAL2 [off2] {sym2} ptr idx) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> (MOVWstoreidx2 [off1+off2] {mergeSym(sym1,sym2)} ptr idx val mem) -(MOVLstore [off1] {sym1} (LEAL1 [off2] {sym2} ptr idx) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> - (MOVLstoreidx1 [off1+off2] {mergeSym(sym1,sym2)} ptr idx val mem) -(MOVLstore [off1] {sym1} (LEAL4 [off2] {sym2} ptr idx) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> - (MOVLstoreidx4 [off1+off2] {mergeSym(sym1,sym2)} ptr idx val mem) -(MOVSSstore [off1] {sym1} (LEAL1 [off2] {sym2} ptr idx) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> - (MOVSSstoreidx1 [off1+off2] {mergeSym(sym1,sym2)} ptr idx val mem) -(MOVSSstore [off1] {sym1} (LEAL4 [off2] {sym2} ptr idx) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> - (MOVSSstoreidx4 [off1+off2] {mergeSym(sym1,sym2)} ptr idx val mem) -(MOVSDstore [off1] {sym1} (LEAL1 [off2] {sym2} ptr idx) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> - (MOVSDstoreidx1 [off1+off2] {mergeSym(sym1,sym2)} ptr idx val mem) +(MOV(L|SS)store [off1] {sym1} (LEAL4 [off2] {sym2} ptr idx) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> + (MOV(L|SS)storeidx4 [off1+off2] {mergeSym(sym1,sym2)} ptr idx val mem) (MOVSDstore [off1] {sym1} (LEAL8 [off2] {sym2} ptr idx) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> (MOVSDstoreidx8 [off1+off2] {mergeSym(sym1,sym2)} ptr idx val mem) @@ -775,31 +755,17 @@ && ValAndOff(valoff1).canAdd(off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) -> ((ADD|AND|OR|XOR)Lconstmodify [ValAndOff(valoff1).add(off2)] {mergeSym(sym1,sym2)} base mem) -(MOVBload [off] {sym} (ADDL ptr idx) mem) && ptr.Op != OpSB -> (MOVBloadidx1 [off] {sym} ptr idx mem) -(MOVWload [off] {sym} (ADDL ptr idx) mem) && ptr.Op != OpSB -> (MOVWloadidx1 [off] {sym} ptr idx mem) -(MOVLload [off] {sym} (ADDL ptr idx) mem) && ptr.Op != OpSB -> (MOVLloadidx1 [off] {sym} ptr idx mem) -(MOVSSload [off] {sym} (ADDL ptr idx) mem) && ptr.Op != OpSB -> (MOVSSloadidx1 [off] {sym} ptr idx mem) -(MOVSDload [off] {sym} (ADDL ptr idx) mem) && ptr.Op != OpSB -> (MOVSDloadidx1 [off] {sym} ptr idx mem) -(MOVBstore [off] {sym} (ADDL ptr idx) val mem) && ptr.Op != OpSB -> (MOVBstoreidx1 [off] {sym} ptr idx val mem) -(MOVWstore [off] {sym} (ADDL ptr idx) val mem) && ptr.Op != OpSB -> (MOVWstoreidx1 [off] {sym} ptr idx val mem) -(MOVLstore [off] {sym} (ADDL ptr idx) val mem) && ptr.Op != OpSB -> (MOVLstoreidx1 [off] {sym} ptr idx val mem) -(MOVSSstore [off] {sym} (ADDL ptr idx) val mem) && ptr.Op != OpSB -> (MOVSSstoreidx1 [off] {sym} ptr idx val mem) -(MOVSDstore [off] {sym} (ADDL ptr idx) val mem) && ptr.Op != OpSB -> (MOVSDstoreidx1 [off] {sym} ptr idx val mem) +(MOV(B|W|L|SS|SD)load [off] {sym} (ADDL ptr idx) mem) && ptr.Op != OpSB -> (MOV(B|W|L|SS|SD)loadidx1 [off] {sym} ptr idx mem) +(MOV(B|W|L|SS|SD)store [off] {sym} (ADDL ptr idx) val mem) && ptr.Op != OpSB -> (MOV(B|W|L|SS|SD)storeidx1 [off] {sym} ptr idx val mem) -(MOVBstoreconst [x] {sym1} (LEAL1 [off] {sym2} ptr idx) mem) && canMergeSym(sym1, sym2) -> - (MOVBstoreconstidx1 [ValAndOff(x).add(off)] {mergeSym(sym1,sym2)} ptr idx mem) -(MOVWstoreconst [x] {sym1} (LEAL1 [off] {sym2} ptr idx) mem) && canMergeSym(sym1, sym2) -> - (MOVWstoreconstidx1 [ValAndOff(x).add(off)] {mergeSym(sym1,sym2)} ptr idx mem) +(MOV(B|W|L)storeconst [x] {sym1} (LEAL1 [off] {sym2} ptr idx) mem) && canMergeSym(sym1, sym2) -> + (MOV(B|W|L)storeconstidx1 [ValAndOff(x).add(off)] {mergeSym(sym1,sym2)} ptr idx mem) (MOVWstoreconst [x] {sym1} (LEAL2 [off] {sym2} ptr idx) mem) && canMergeSym(sym1, sym2) -> (MOVWstoreconstidx2 [ValAndOff(x).add(off)] {mergeSym(sym1,sym2)} ptr idx mem) -(MOVLstoreconst [x] {sym1} (LEAL1 [off] {sym2} ptr idx) mem) && canMergeSym(sym1, sym2) -> - (MOVLstoreconstidx1 [ValAndOff(x).add(off)] {mergeSym(sym1,sym2)} ptr idx mem) (MOVLstoreconst [x] {sym1} (LEAL4 [off] {sym2} ptr idx) mem) && canMergeSym(sym1, sym2) -> (MOVLstoreconstidx4 [ValAndOff(x).add(off)] {mergeSym(sym1,sym2)} ptr idx mem) -(MOVBstoreconst [x] {sym} (ADDL ptr idx) mem) -> (MOVBstoreconstidx1 [x] {sym} ptr idx mem) -(MOVWstoreconst [x] {sym} (ADDL ptr idx) mem) -> (MOVWstoreconstidx1 [x] {sym} ptr idx mem) -(MOVLstoreconst [x] {sym} (ADDL ptr idx) mem) -> (MOVLstoreconstidx1 [x] {sym} ptr idx mem) +(MOV(B|W|L)storeconst [x] {sym} (ADDL ptr idx) mem) -> (MOV(B|W|L)storeconstidx1 [x] {sym} ptr idx mem) // combine SHLL into indexed loads and stores (MOVWloadidx1 [c] {sym} ptr (SHLLconst [1] idx) mem) -> (MOVWloadidx2 [c] {sym} ptr idx mem) @@ -810,44 +776,24 @@ (MOVLstoreconstidx1 [c] {sym} ptr (SHLLconst [2] idx) mem) -> (MOVLstoreconstidx4 [c] {sym} ptr idx mem) // combine ADDL into indexed loads and stores -(MOVBloadidx1 [c] {sym} (ADDLconst [d] ptr) idx mem) -> (MOVBloadidx1 [int64(int32(c+d))] {sym} ptr idx mem) -(MOVWloadidx1 [c] {sym} (ADDLconst [d] ptr) idx mem) -> (MOVWloadidx1 [int64(int32(c+d))] {sym} ptr idx mem) +(MOV(B|W|L|SS|SD)loadidx1 [c] {sym} (ADDLconst [d] ptr) idx mem) -> (MOV(B|W|L|SS|SD)loadidx1 [int64(int32(c+d))] {sym} ptr idx mem) (MOVWloadidx2 [c] {sym} (ADDLconst [d] ptr) idx mem) -> (MOVWloadidx2 [int64(int32(c+d))] {sym} ptr idx mem) -(MOVLloadidx1 [c] {sym} (ADDLconst [d] ptr) idx mem) -> (MOVLloadidx1 [int64(int32(c+d))] {sym} ptr idx mem) -(MOVLloadidx4 [c] {sym} (ADDLconst [d] ptr) idx mem) -> (MOVLloadidx4 [int64(int32(c+d))] {sym} ptr idx mem) -(MOVSSloadidx1 [c] {sym} (ADDLconst [d] ptr) idx mem) -> (MOVSSloadidx1 [int64(int32(c+d))] {sym} ptr idx mem) -(MOVSSloadidx4 [c] {sym} (ADDLconst [d] ptr) idx mem) -> (MOVSSloadidx4 [int64(int32(c+d))] {sym} ptr idx mem) -(MOVSDloadidx1 [c] {sym} (ADDLconst [d] ptr) idx mem) -> (MOVSDloadidx1 [int64(int32(c+d))] {sym} ptr idx mem) +(MOV(L|SS)loadidx4 [c] {sym} (ADDLconst [d] ptr) idx mem) -> (MOV(L|SS)loadidx4 [int64(int32(c+d))] {sym} ptr idx mem) (MOVSDloadidx8 [c] {sym} (ADDLconst [d] ptr) idx mem) -> (MOVSDloadidx8 [int64(int32(c+d))] {sym} ptr idx mem) -(MOVBstoreidx1 [c] {sym} (ADDLconst [d] ptr) idx val mem) -> (MOVBstoreidx1 [int64(int32(c+d))] {sym} ptr idx val mem) -(MOVWstoreidx1 [c] {sym} (ADDLconst [d] ptr) idx val mem) -> (MOVWstoreidx1 [int64(int32(c+d))] {sym} ptr idx val mem) -(MOVWstoreidx2 [c] {sym} (ADDLconst [d] ptr) idx val mem) -> (MOVWstoreidx2 [int64(int32(c+d))] {sym} ptr idx val mem) -(MOVLstoreidx1 [c] {sym} (ADDLconst [d] ptr) idx val mem) -> (MOVLstoreidx1 [int64(int32(c+d))] {sym} ptr idx val mem) -(MOVLstoreidx4 [c] {sym} (ADDLconst [d] ptr) idx val mem) -> (MOVLstoreidx4 [int64(int32(c+d))] {sym} ptr idx val mem) -(MOVSSstoreidx1 [c] {sym} (ADDLconst [d] ptr) idx val mem) -> (MOVSSstoreidx1 [int64(int32(c+d))] {sym} ptr idx val mem) -(MOVSSstoreidx4 [c] {sym} (ADDLconst [d] ptr) idx val mem) -> (MOVSSstoreidx4 [int64(int32(c+d))] {sym} ptr idx val mem) -(MOVSDstoreidx1 [c] {sym} (ADDLconst [d] ptr) idx val mem) -> (MOVSDstoreidx1 [int64(int32(c+d))] {sym} ptr idx val mem) -(MOVSDstoreidx8 [c] {sym} (ADDLconst [d] ptr) idx val mem) -> (MOVSDstoreidx8 [int64(int32(c+d))] {sym} ptr idx val mem) +(MOV(B|W|L|SS|SD)storeidx1 [c] {sym} (ADDLconst [d] ptr) idx val mem) -> (MOV(B|W|L|SS|SD)storeidx1 [int64(int32(c+d))] {sym} ptr idx val mem) +(MOVWstoreidx2 [c] {sym} (ADDLconst [d] ptr) idx val mem) -> (MOVWstoreidx2 [int64(int32(c+d))] {sym} ptr idx val mem) +(MOV(L|SS)storeidx4 [c] {sym} (ADDLconst [d] ptr) idx val mem) -> (MOV(L|SS)storeidx4 [int64(int32(c+d))] {sym} ptr idx val mem) +(MOVSDstoreidx8 [c] {sym} (ADDLconst [d] ptr) idx val mem) -> (MOVSDstoreidx8 [int64(int32(c+d))] {sym} ptr idx val mem) -(MOVBloadidx1 [c] {sym} ptr (ADDLconst [d] idx) mem) -> (MOVBloadidx1 [int64(int32(c+d))] {sym} ptr idx mem) -(MOVWloadidx1 [c] {sym} ptr (ADDLconst [d] idx) mem) -> (MOVWloadidx1 [int64(int32(c+d))] {sym} ptr idx mem) -(MOVWloadidx2 [c] {sym} ptr (ADDLconst [d] idx) mem) -> (MOVWloadidx2 [int64(int32(c+2*d))] {sym} ptr idx mem) -(MOVLloadidx1 [c] {sym} ptr (ADDLconst [d] idx) mem) -> (MOVLloadidx1 [int64(int32(c+d))] {sym} ptr idx mem) -(MOVLloadidx4 [c] {sym} ptr (ADDLconst [d] idx) mem) -> (MOVLloadidx4 [int64(int32(c+4*d))] {sym} ptr idx mem) -(MOVSSloadidx1 [c] {sym} ptr (ADDLconst [d] idx) mem) -> (MOVSSloadidx1 [int64(int32(c+d))] {sym} ptr idx mem) -(MOVSSloadidx4 [c] {sym} ptr (ADDLconst [d] idx) mem) -> (MOVSSloadidx4 [int64(int32(c+4*d))] {sym} ptr idx mem) -(MOVSDloadidx1 [c] {sym} ptr (ADDLconst [d] idx) mem) -> (MOVSDloadidx1 [int64(int32(c+d))] {sym} ptr idx mem) +(MOV(B|W|L|SS|SD)loadidx1 [c] {sym} ptr (ADDLconst [d] idx) mem) -> (MOV(B|W|L|SS|SD)loadidx1 [int64(int32(c+d))] {sym} ptr idx mem) +(MOVWloadidx2 [c] {sym} ptr (ADDLconst [d] idx) mem) -> (MOVWloadidx2 [int64(int32(c+2*d))] {sym} ptr idx mem) +(MOV(L|SS)loadidx4 [c] {sym} ptr (ADDLconst [d] idx) mem) -> (MOV(L|SS)loadidx4 [int64(int32(c+4*d))] {sym} ptr idx mem) (MOVSDloadidx8 [c] {sym} ptr (ADDLconst [d] idx) mem) -> (MOVSDloadidx8 [int64(int32(c+8*d))] {sym} ptr idx mem) -(MOVBstoreidx1 [c] {sym} ptr (ADDLconst [d] idx) val mem) -> (MOVBstoreidx1 [int64(int32(c+d))] {sym} ptr idx val mem) -(MOVWstoreidx1 [c] {sym} ptr (ADDLconst [d] idx) val mem) -> (MOVWstoreidx1 [int64(int32(c+d))] {sym} ptr idx val mem) +(MOV(B|W|L|SS|SD)storeidx1 [c] {sym} ptr (ADDLconst [d] idx) val mem) -> (MOV(B|W|L|SS|SD)storeidx1 [int64(int32(c+d))] {sym} ptr idx val mem) (MOVWstoreidx2 [c] {sym} ptr (ADDLconst [d] idx) val mem) -> (MOVWstoreidx2 [int64(int32(c+2*d))] {sym} ptr idx val mem) -(MOVLstoreidx1 [c] {sym} ptr (ADDLconst [d] idx) val mem) -> (MOVLstoreidx1 [int64(int32(c+d))] {sym} ptr idx val mem) -(MOVLstoreidx4 [c] {sym} ptr (ADDLconst [d] idx) val mem) -> (MOVLstoreidx4 [int64(int32(c+4*d))] {sym} ptr idx val mem) -(MOVSSstoreidx1 [c] {sym} ptr (ADDLconst [d] idx) val mem) -> (MOVSSstoreidx1 [int64(int32(c+d))] {sym} ptr idx val mem) -(MOVSSstoreidx4 [c] {sym} ptr (ADDLconst [d] idx) val mem) -> (MOVSSstoreidx4 [int64(int32(c+4*d))] {sym} ptr idx val mem) -(MOVSDstoreidx1 [c] {sym} ptr (ADDLconst [d] idx) val mem) -> (MOVSDstoreidx1 [int64(int32(c+d))] {sym} ptr idx val mem) +(MOV(L|SS)storeidx4 [c] {sym} ptr (ADDLconst [d] idx) val mem) -> (MOV(L|SS)storeidx4 [int64(int32(c+4*d))] {sym} ptr idx val mem) (MOVSDstoreidx8 [c] {sym} ptr (ADDLconst [d] idx) val mem) -> (MOVSDstoreidx8 [int64(int32(c+8*d))] {sym} ptr idx val mem) // Merge load/store to op @@ -861,25 +807,17 @@ && y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) && validValAndOff(c,off) -> ((ADD|AND|OR|XOR)Lconstmodify [makeValAndOff(c,off)] {sym} ptr mem) -(MOVBstoreconstidx1 [x] {sym} (ADDLconst [c] ptr) idx mem) -> - (MOVBstoreconstidx1 [ValAndOff(x).add(c)] {sym} ptr idx mem) -(MOVWstoreconstidx1 [x] {sym} (ADDLconst [c] ptr) idx mem) -> - (MOVWstoreconstidx1 [ValAndOff(x).add(c)] {sym} ptr idx mem) +(MOV(B|W|L)storeconstidx1 [x] {sym} (ADDLconst [c] ptr) idx mem) -> + (MOV(B|W|L)storeconstidx1 [ValAndOff(x).add(c)] {sym} ptr idx mem) (MOVWstoreconstidx2 [x] {sym} (ADDLconst [c] ptr) idx mem) -> (MOVWstoreconstidx2 [ValAndOff(x).add(c)] {sym} ptr idx mem) -(MOVLstoreconstidx1 [x] {sym} (ADDLconst [c] ptr) idx mem) -> - (MOVLstoreconstidx1 [ValAndOff(x).add(c)] {sym} ptr idx mem) (MOVLstoreconstidx4 [x] {sym} (ADDLconst [c] ptr) idx mem) -> (MOVLstoreconstidx4 [ValAndOff(x).add(c)] {sym} ptr idx mem) -(MOVBstoreconstidx1 [x] {sym} ptr (ADDLconst [c] idx) mem) -> - (MOVBstoreconstidx1 [ValAndOff(x).add(c)] {sym} ptr idx mem) -(MOVWstoreconstidx1 [x] {sym} ptr (ADDLconst [c] idx) mem) -> - (MOVWstoreconstidx1 [ValAndOff(x).add(c)] {sym} ptr idx mem) +(MOV(B|W|L)storeconstidx1 [x] {sym} ptr (ADDLconst [c] idx) mem) -> + (MOV(B|W|L)storeconstidx1 [ValAndOff(x).add(c)] {sym} ptr idx mem) (MOVWstoreconstidx2 [x] {sym} ptr (ADDLconst [c] idx) mem) -> (MOVWstoreconstidx2 [ValAndOff(x).add(2*c)] {sym} ptr idx mem) -(MOVLstoreconstidx1 [x] {sym} ptr (ADDLconst [c] idx) mem) -> - (MOVLstoreconstidx1 [ValAndOff(x).add(c)] {sym} ptr idx mem) (MOVLstoreconstidx4 [x] {sym} ptr (ADDLconst [c] idx) mem) -> (MOVLstoreconstidx4 [ValAndOff(x).add(4*c)] {sym} ptr idx mem) From dc492682b6b0fba963b7f44fde1526723518c708 Mon Sep 17 00:00:00 2001 From: Ben Shi Date: Sat, 6 Oct 2018 03:00:31 +0000 Subject: [PATCH 037/240] cmd/compile: combine 386 rules via regular expression This CL combines similar rules together via regular expression, while does not impact generated 386 code. Change-Id: I2b26e7fc6adffa0fa10eeb04a4f3a76ddabc760b Reviewed-on: https://go-review.googlesource.com/c/140297 Reviewed-by: Keith Randall --- src/cmd/compile/internal/ssa/gen/386.rules | 76 ++++------------------ 1 file changed, 12 insertions(+), 64 deletions(-) diff --git a/src/cmd/compile/internal/ssa/gen/386.rules b/src/cmd/compile/internal/ssa/gen/386.rules index 83c469024c..c817994add 100644 --- a/src/cmd/compile/internal/ssa/gen/386.rules +++ b/src/cmd/compile/internal/ssa/gen/386.rules @@ -614,27 +614,16 @@ (MOVWLSX (ANDLconst [c] x)) && c & 0x8000 == 0 -> (ANDLconst [c & 0x7fff] x) // Don't extend before storing -(MOVWstore [off] {sym} ptr (MOVWLSX x) mem) -> (MOVWstore [off] {sym} ptr x mem) -(MOVBstore [off] {sym} ptr (MOVBLSX x) mem) -> (MOVBstore [off] {sym} ptr x mem) -(MOVWstore [off] {sym} ptr (MOVWLZX x) mem) -> (MOVWstore [off] {sym} ptr x mem) -(MOVBstore [off] {sym} ptr (MOVBLZX x) mem) -> (MOVBstore [off] {sym} ptr x mem) +(MOVWstore [off] {sym} ptr (MOVWL(S|Z)X x) mem) -> (MOVWstore [off] {sym} ptr x mem) +(MOVBstore [off] {sym} ptr (MOVBL(S|Z)X x) mem) -> (MOVBstore [off] {sym} ptr x mem) // fold constants into memory operations // Note that this is not always a good idea because if not all the uses of // the ADDQconst get eliminated, we still have to compute the ADDQconst and we now // have potentially two live values (ptr and (ADDQconst [off] ptr)) instead of one. // Nevertheless, let's do it! -(MOVLload [off1] {sym} (ADDLconst [off2] ptr) mem) && is32Bit(off1+off2) -> (MOVLload [off1+off2] {sym} ptr mem) -(MOVWload [off1] {sym} (ADDLconst [off2] ptr) mem) && is32Bit(off1+off2) -> (MOVWload [off1+off2] {sym} ptr mem) -(MOVBload [off1] {sym} (ADDLconst [off2] ptr) mem) && is32Bit(off1+off2) -> (MOVBload [off1+off2] {sym} ptr mem) -(MOVSSload [off1] {sym} (ADDLconst [off2] ptr) mem) && is32Bit(off1+off2) -> (MOVSSload [off1+off2] {sym} ptr mem) -(MOVSDload [off1] {sym} (ADDLconst [off2] ptr) mem) && is32Bit(off1+off2) -> (MOVSDload [off1+off2] {sym} ptr mem) - -(MOVLstore [off1] {sym} (ADDLconst [off2] ptr) val mem) && is32Bit(off1+off2) -> (MOVLstore [off1+off2] {sym} ptr val mem) -(MOVWstore [off1] {sym} (ADDLconst [off2] ptr) val mem) && is32Bit(off1+off2) -> (MOVWstore [off1+off2] {sym} ptr val mem) -(MOVBstore [off1] {sym} (ADDLconst [off2] ptr) val mem) && is32Bit(off1+off2) -> (MOVBstore [off1+off2] {sym} ptr val mem) -(MOVSSstore [off1] {sym} (ADDLconst [off2] ptr) val mem) && is32Bit(off1+off2) -> (MOVSSstore [off1+off2] {sym} ptr val mem) -(MOVSDstore [off1] {sym} (ADDLconst [off2] ptr) val mem) && is32Bit(off1+off2) -> (MOVSDstore [off1+off2] {sym} ptr val mem) +(MOV(L|W|B|SS|SD)load [off1] {sym} (ADDLconst [off2] ptr) mem) && is32Bit(off1+off2) -> (MOV(L|W|B|SS|SD)load [off1+off2] {sym} ptr mem) +(MOV(L|W|B|SS|SD)store [off1] {sym} (ADDLconst [off2] ptr) val mem) && is32Bit(off1+off2) -> (MOV(L|W|B|SS|SD)store [off1+off2] {sym} ptr val mem) ((ADD|SUB|MUL|AND|OR|XOR)Lload [off1] {sym} val (ADDLconst [off2] base) mem) && is32Bit(off1+off2) -> ((ADD|SUB|MUL|AND|OR|XOR)Lload [off1+off2] {sym} val base mem) @@ -656,12 +645,8 @@ (MOVBstoreconst [makeValAndOff(int64(int8(c)),off)] {sym} ptr mem) // Fold address offsets into constant stores. -(MOVLstoreconst [sc] {s} (ADDLconst [off] ptr) mem) && ValAndOff(sc).canAdd(off) -> - (MOVLstoreconst [ValAndOff(sc).add(off)] {s} ptr mem) -(MOVWstoreconst [sc] {s} (ADDLconst [off] ptr) mem) && ValAndOff(sc).canAdd(off) -> - (MOVWstoreconst [ValAndOff(sc).add(off)] {s} ptr mem) -(MOVBstoreconst [sc] {s} (ADDLconst [off] ptr) mem) && ValAndOff(sc).canAdd(off) -> - (MOVBstoreconst [ValAndOff(sc).add(off)] {s} ptr mem) +(MOV(L|W|B)storeconst [sc] {s} (ADDLconst [off] ptr) mem) && ValAndOff(sc).canAdd(off) -> + (MOV(L|W|B)storeconst [ValAndOff(sc).add(off)] {s} ptr mem) // We need to fold LEAQ into the MOVx ops so that the live variable analysis knows // what variables are being read/written by the ops. @@ -671,54 +656,17 @@ // a separate instruction gives us that register. Having the LEAL be // a separate instruction also allows it to be CSEd (which is good because // it compiles to a thunk call). -(MOVLload [off1] {sym1} (LEAL [off2] {sym2} base) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) +(MOV(L|W|B|SS|SD|BLSX|WLSX)load [off1] {sym1} (LEAL [off2] {sym2} base) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVLload [off1+off2] {mergeSym(sym1,sym2)} base mem) -(MOVWload [off1] {sym1} (LEAL [off2] {sym2} base) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) - && (base.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVWload [off1+off2] {mergeSym(sym1,sym2)} base mem) -(MOVBload [off1] {sym1} (LEAL [off2] {sym2} base) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) - && (base.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVBload [off1+off2] {mergeSym(sym1,sym2)} base mem) -(MOVSSload [off1] {sym1} (LEAL [off2] {sym2} base) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) - && (base.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVSSload [off1+off2] {mergeSym(sym1,sym2)} base mem) -(MOVSDload [off1] {sym1} (LEAL [off2] {sym2} base) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) - && (base.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVSDload [off1+off2] {mergeSym(sym1,sym2)} base mem) + (MOV(L|W|B|SS|SD|BLSX|WLSX)load [off1+off2] {mergeSym(sym1,sym2)} base mem) -(MOVBLSXload [off1] {sym1} (LEAL [off2] {sym2} base) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) +(MOV(L|W|B|SS|SD)store [off1] {sym1} (LEAL [off2] {sym2} base) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVBLSXload [off1+off2] {mergeSym(sym1,sym2)} base mem) -(MOVWLSXload [off1] {sym1} (LEAL [off2] {sym2} base) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) - && (base.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVWLSXload [off1+off2] {mergeSym(sym1,sym2)} base mem) + (MOV(L|W|B|SS|SD)store [off1+off2] {mergeSym(sym1,sym2)} base val mem) -(MOVLstore [off1] {sym1} (LEAL [off2] {sym2} base) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) - && (base.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVLstore [off1+off2] {mergeSym(sym1,sym2)} base val mem) -(MOVWstore [off1] {sym1} (LEAL [off2] {sym2} base) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) - && (base.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVWstore [off1+off2] {mergeSym(sym1,sym2)} base val mem) -(MOVBstore [off1] {sym1} (LEAL [off2] {sym2} base) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) - && (base.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVBstore [off1+off2] {mergeSym(sym1,sym2)} base val mem) -(MOVSSstore [off1] {sym1} (LEAL [off2] {sym2} base) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) - && (base.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVSSstore [off1+off2] {mergeSym(sym1,sym2)} base val mem) -(MOVSDstore [off1] {sym1} (LEAL [off2] {sym2} base) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) - && (base.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVSDstore [off1+off2] {mergeSym(sym1,sym2)} base val mem) - -(MOVLstoreconst [sc] {sym1} (LEAL [off] {sym2} ptr) mem) && canMergeSym(sym1, sym2) && ValAndOff(sc).canAdd(off) +(MOV(L|W|B)storeconst [sc] {sym1} (LEAL [off] {sym2} ptr) mem) && canMergeSym(sym1, sym2) && ValAndOff(sc).canAdd(off) && (ptr.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVLstoreconst [ValAndOff(sc).add(off)] {mergeSym(sym1, sym2)} ptr mem) -(MOVWstoreconst [sc] {sym1} (LEAL [off] {sym2} ptr) mem) && canMergeSym(sym1, sym2) && ValAndOff(sc).canAdd(off) - && (ptr.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVWstoreconst [ValAndOff(sc).add(off)] {mergeSym(sym1, sym2)} ptr mem) -(MOVBstoreconst [sc] {sym1} (LEAL [off] {sym2} ptr) mem) && canMergeSym(sym1, sym2) && ValAndOff(sc).canAdd(off) - && (ptr.Op != OpSB || !config.ctxt.Flag_shared) -> - (MOVBstoreconst [ValAndOff(sc).add(off)] {mergeSym(sym1, sym2)} ptr mem) + (MOV(L|W|B)storeconst [ValAndOff(sc).add(off)] {mergeSym(sym1, sym2)} ptr mem) // generating indexed loads and stores (MOV(B|W|L|SS|SD)load [off1] {sym1} (LEAL1 [off2] {sym2} ptr idx) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> From 2294e3ebd374e18b191d0e8d8d32c46b0a1ef961 Mon Sep 17 00:00:00 2001 From: Ben Shi Date: Sat, 6 Oct 2018 03:35:17 +0000 Subject: [PATCH 038/240] cmd/compile: combine similar code in amd64's assembly generator This CL combines similar code in amd64's assembly generator. The total size of pkg/linux_amd64/cmd/compile/ decreases about 4.5KB, while the generated amd64 code is not affected. Change-Id: I4cdbdd22bde8857aafdc29b47fa100a906fa1598 Reviewed-on: https://go-review.googlesource.com/c/140298 Run-TryBot: Ben Shi Reviewed-by: Keith Randall --- src/cmd/compile/internal/amd64/ssa.go | 94 +++++++++------------------ 1 file changed, 30 insertions(+), 64 deletions(-) diff --git a/src/cmd/compile/internal/amd64/ssa.go b/src/cmd/compile/internal/amd64/ssa.go index b4c4b1f4cd..b5e31e1601 100644 --- a/src/cmd/compile/internal/amd64/ssa.go +++ b/src/cmd/compile/internal/amd64/ssa.go @@ -653,43 +653,26 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { gc.AddAux(&p.From, v) p.To.Type = obj.TYPE_REG p.To.Reg = v.Reg() - case ssa.OpAMD64MOVQloadidx8, ssa.OpAMD64MOVSDloadidx8, ssa.OpAMD64MOVLloadidx8: - p := s.Prog(v.Op.Asm()) - p.From.Type = obj.TYPE_MEM - p.From.Reg = v.Args[0].Reg() - gc.AddAux(&p.From, v) - p.From.Scale = 8 - p.From.Index = v.Args[1].Reg() - p.To.Type = obj.TYPE_REG - p.To.Reg = v.Reg() - case ssa.OpAMD64MOVLloadidx4, ssa.OpAMD64MOVSSloadidx4: - p := s.Prog(v.Op.Asm()) - p.From.Type = obj.TYPE_MEM - p.From.Reg = v.Args[0].Reg() - gc.AddAux(&p.From, v) - p.From.Scale = 4 - p.From.Index = v.Args[1].Reg() - p.To.Type = obj.TYPE_REG - p.To.Reg = v.Reg() - case ssa.OpAMD64MOVWloadidx2: - p := s.Prog(v.Op.Asm()) - p.From.Type = obj.TYPE_MEM - p.From.Reg = v.Args[0].Reg() - gc.AddAux(&p.From, v) - p.From.Scale = 2 - p.From.Index = v.Args[1].Reg() - p.To.Type = obj.TYPE_REG - p.To.Reg = v.Reg() - case ssa.OpAMD64MOVBloadidx1, ssa.OpAMD64MOVWloadidx1, ssa.OpAMD64MOVLloadidx1, ssa.OpAMD64MOVQloadidx1, ssa.OpAMD64MOVSSloadidx1, ssa.OpAMD64MOVSDloadidx1: + case ssa.OpAMD64MOVBloadidx1, ssa.OpAMD64MOVWloadidx1, ssa.OpAMD64MOVLloadidx1, ssa.OpAMD64MOVQloadidx1, ssa.OpAMD64MOVSSloadidx1, ssa.OpAMD64MOVSDloadidx1, + ssa.OpAMD64MOVQloadidx8, ssa.OpAMD64MOVSDloadidx8, ssa.OpAMD64MOVLloadidx8, ssa.OpAMD64MOVLloadidx4, ssa.OpAMD64MOVSSloadidx4, ssa.OpAMD64MOVWloadidx2: r := v.Args[0].Reg() i := v.Args[1].Reg() - if i == x86.REG_SP { - r, i = i, r - } p := s.Prog(v.Op.Asm()) p.From.Type = obj.TYPE_MEM + switch v.Op { + case ssa.OpAMD64MOVBloadidx1, ssa.OpAMD64MOVWloadidx1, ssa.OpAMD64MOVLloadidx1, ssa.OpAMD64MOVQloadidx1, ssa.OpAMD64MOVSSloadidx1, ssa.OpAMD64MOVSDloadidx1: + if i == x86.REG_SP { + r, i = i, r + } + p.From.Scale = 1 + case ssa.OpAMD64MOVQloadidx8, ssa.OpAMD64MOVSDloadidx8, ssa.OpAMD64MOVLloadidx8: + p.From.Scale = 8 + case ssa.OpAMD64MOVLloadidx4, ssa.OpAMD64MOVSSloadidx4: + p.From.Scale = 4 + case ssa.OpAMD64MOVWloadidx2: + p.From.Scale = 2 + } p.From.Reg = r - p.From.Scale = 1 p.From.Index = i gc.AddAux(&p.From, v) p.To.Type = obj.TYPE_REG @@ -704,45 +687,28 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { p.To.Type = obj.TYPE_MEM p.To.Reg = v.Args[0].Reg() gc.AddAux(&p.To, v) - case ssa.OpAMD64MOVQstoreidx8, ssa.OpAMD64MOVSDstoreidx8, ssa.OpAMD64MOVLstoreidx8: - p := s.Prog(v.Op.Asm()) - p.From.Type = obj.TYPE_REG - p.From.Reg = v.Args[2].Reg() - p.To.Type = obj.TYPE_MEM - p.To.Reg = v.Args[0].Reg() - p.To.Scale = 8 - p.To.Index = v.Args[1].Reg() - gc.AddAux(&p.To, v) - case ssa.OpAMD64MOVSSstoreidx4, ssa.OpAMD64MOVLstoreidx4: - p := s.Prog(v.Op.Asm()) - p.From.Type = obj.TYPE_REG - p.From.Reg = v.Args[2].Reg() - p.To.Type = obj.TYPE_MEM - p.To.Reg = v.Args[0].Reg() - p.To.Scale = 4 - p.To.Index = v.Args[1].Reg() - gc.AddAux(&p.To, v) - case ssa.OpAMD64MOVWstoreidx2: - p := s.Prog(v.Op.Asm()) - p.From.Type = obj.TYPE_REG - p.From.Reg = v.Args[2].Reg() - p.To.Type = obj.TYPE_MEM - p.To.Reg = v.Args[0].Reg() - p.To.Scale = 2 - p.To.Index = v.Args[1].Reg() - gc.AddAux(&p.To, v) - case ssa.OpAMD64MOVBstoreidx1, ssa.OpAMD64MOVWstoreidx1, ssa.OpAMD64MOVLstoreidx1, ssa.OpAMD64MOVQstoreidx1, ssa.OpAMD64MOVSSstoreidx1, ssa.OpAMD64MOVSDstoreidx1: + case ssa.OpAMD64MOVBstoreidx1, ssa.OpAMD64MOVWstoreidx1, ssa.OpAMD64MOVLstoreidx1, ssa.OpAMD64MOVQstoreidx1, ssa.OpAMD64MOVSSstoreidx1, ssa.OpAMD64MOVSDstoreidx1, + ssa.OpAMD64MOVQstoreidx8, ssa.OpAMD64MOVSDstoreidx8, ssa.OpAMD64MOVLstoreidx8, ssa.OpAMD64MOVSSstoreidx4, ssa.OpAMD64MOVLstoreidx4, ssa.OpAMD64MOVWstoreidx2: r := v.Args[0].Reg() i := v.Args[1].Reg() - if i == x86.REG_SP { - r, i = i, r - } p := s.Prog(v.Op.Asm()) p.From.Type = obj.TYPE_REG p.From.Reg = v.Args[2].Reg() p.To.Type = obj.TYPE_MEM + switch v.Op { + case ssa.OpAMD64MOVBstoreidx1, ssa.OpAMD64MOVWstoreidx1, ssa.OpAMD64MOVLstoreidx1, ssa.OpAMD64MOVQstoreidx1, ssa.OpAMD64MOVSSstoreidx1, ssa.OpAMD64MOVSDstoreidx1: + if i == x86.REG_SP { + r, i = i, r + } + p.To.Scale = 1 + case ssa.OpAMD64MOVQstoreidx8, ssa.OpAMD64MOVSDstoreidx8, ssa.OpAMD64MOVLstoreidx8: + p.To.Scale = 8 + case ssa.OpAMD64MOVSSstoreidx4, ssa.OpAMD64MOVLstoreidx4: + p.To.Scale = 4 + case ssa.OpAMD64MOVWstoreidx2: + p.To.Scale = 2 + } p.To.Reg = r - p.To.Scale = 1 p.To.Index = i gc.AddAux(&p.To, v) case ssa.OpAMD64ADDQconstmodify, ssa.OpAMD64ADDLconstmodify: From 963776e689c4c015c89464ab4fef90ae50373f66 Mon Sep 17 00:00:00 2001 From: Roberto Date: Sat, 6 Oct 2018 06:53:32 +0000 Subject: [PATCH 039/240] sync: fix typo in doc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Ie1f35c7598bd2549a048d64e1b1279bf4acaa103 GitHub-Last-Rev: c8cc7dfef987cbd04f48daabf23efa64c0c67322 GitHub-Pull-Request: golang/go#28051 Reviewed-on: https://go-review.googlesource.com/c/140302 Reviewed-by: Daniel Martí --- src/sync/runtime.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/sync/runtime.go b/src/sync/runtime.go index be16bcc8f7..a13d9f6cf1 100644 --- a/src/sync/runtime.go +++ b/src/sync/runtime.go @@ -54,7 +54,7 @@ func init() { } // Active spinning runtime support. -// runtime_canSpin returns true is spinning makes sense at the moment. +// runtime_canSpin returns true if spinning makes sense at the moment. func runtime_canSpin(i int) bool // runtime_doSpin does active spinning. From 8aee193fb8b61d474a7e3e6d43625f4e746c5b65 Mon Sep 17 00:00:00 2001 From: Tim Cooper Date: Thu, 27 Sep 2018 16:55:24 -0500 Subject: [PATCH 040/240] all: remove unneeded parentheses from package consts and vars Change-Id: Ic7fce53c6264107c15b127d9c9ca0bec11a888ff Reviewed-on: https://go-review.googlesource.com/c/138183 Reviewed-by: Brad Fitzpatrick Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- src/cmd/internal/obj/x86/asm6.go | 2 +- src/crypto/rand/rand_freebsd.go | 2 +- src/strconv/atoi.go | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/src/cmd/internal/obj/x86/asm6.go b/src/cmd/internal/obj/x86/asm6.go index d3389e4f15..23ff7f32af 100644 --- a/src/cmd/internal/obj/x86/asm6.go +++ b/src/cmd/internal/obj/x86/asm6.go @@ -2288,7 +2288,7 @@ func instinit(ctxt *obj.Link) { } } -var isAndroid = (objabi.GOOS == "android") +var isAndroid = objabi.GOOS == "android" func prefixof(ctxt *obj.Link, a *obj.Addr) int { if a.Reg < REG_CS && a.Index < REG_CS { // fast path diff --git a/src/crypto/rand/rand_freebsd.go b/src/crypto/rand/rand_freebsd.go index b4d6653343..75f683c386 100644 --- a/src/crypto/rand/rand_freebsd.go +++ b/src/crypto/rand/rand_freebsd.go @@ -6,4 +6,4 @@ package rand // maxGetRandomRead is the maximum number of bytes to ask for in one call to the // getrandom() syscall. In FreeBSD at most 256 bytes will be returned per call. -const maxGetRandomRead = (1 << 8) +const maxGetRandomRead = 1 << 8 diff --git a/src/strconv/atoi.go b/src/strconv/atoi.go index bebed04820..bbfdb7dc39 100644 --- a/src/strconv/atoi.go +++ b/src/strconv/atoi.go @@ -44,7 +44,7 @@ const intSize = 32 << (^uint(0) >> 63) // IntSize is the size in bits of an int or uint value. const IntSize = intSize -const maxUint64 = (1<<64 - 1) +const maxUint64 = 1<<64 - 1 // ParseUint is like ParseInt but for unsigned numbers. func ParseUint(s string, base int, bitSize int) (uint64, error) { From 9f193fbe31d7ffa5f6e71a6387cbcf4636306660 Mon Sep 17 00:00:00 2001 From: Gabriel Aszalos Date: Sat, 30 Jun 2018 18:12:24 +0200 Subject: [PATCH 041/240] encoding/json: use isSpace in stateEndTop This change makes stateEndTop use isSpace instead of specifically recreating the same functionality. Change-Id: I81f8f51682e46e7f8e2b9fed423a968457200625 Reviewed-on: https://go-review.googlesource.com/c/121797 Reviewed-by: Brad Fitzpatrick Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- src/encoding/json/scanner.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/encoding/json/scanner.go b/src/encoding/json/scanner.go index 9e6d482e16..88572245fc 100644 --- a/src/encoding/json/scanner.go +++ b/src/encoding/json/scanner.go @@ -289,7 +289,7 @@ func stateEndValue(s *scanner, c byte) int { // such as after reading `{}` or `[1,2,3]`. // Only space characters should be seen now. func stateEndTop(s *scanner, c byte) int { - if c != ' ' && c != '\t' && c != '\r' && c != '\n' { + if !isSpace(c) { // Complain about non-space byte on next call. s.error(c, "after top-level value") } From f90e89e675443731e36c2de4bcd3cdd7316d3dfc Mon Sep 17 00:00:00 2001 From: Igor Zhilianin Date: Sat, 6 Oct 2018 06:10:25 +0000 Subject: [PATCH 042/240] all: fix a bunch of misspellings Change-Id: If2954bdfc551515403706b2cd0dde94e45936e08 GitHub-Last-Rev: d4cfc41a5504cf10befefdb881d4c45986a1d1f8 GitHub-Pull-Request: golang/go#28049 Reviewed-on: https://go-review.googlesource.com/c/140299 Reviewed-by: Brad Fitzpatrick Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- misc/cgo/test/callback.go | 2 +- misc/cgo/testplugin/unnamed1/main.go | 2 +- misc/cgo/testsanitizers/cc_test.go | 2 +- misc/cgo/testshared/shared_test.go | 2 +- src/cmd/compile/doc.go | 2 +- src/cmd/compile/internal/gc/syntax.go | 2 +- src/cmd/compile/internal/gc/walk.go | 2 +- src/cmd/compile/internal/ssa/gen/PPC64.rules | 2 +- src/cmd/compile/internal/ssa/layout.go | 2 +- src/cmd/compile/internal/ssa/poset.go | 2 +- src/cmd/compile/internal/ssa/stackalloc.go | 2 +- src/cmd/compile/internal/types/pkg.go | 2 +- src/cmd/go/internal/modget/get.go | 2 +- src/cmd/go/testdata/testterminal18153/terminal_test.go | 2 +- src/cmd/internal/obj/arm64/asm7.go | 2 +- src/cmd/internal/obj/util.go | 2 +- src/cmd/internal/obj/x86/asm6.go | 2 +- src/cmd/internal/obj/x86/ytab.go | 2 +- src/cmd/link/internal/ld/dwarf_test.go | 2 +- src/cmd/link/internal/ld/elf.go | 4 ++-- src/cmd/link/internal/ld/lib.go | 2 +- src/cmd/vet/testdata/structtag.go | 4 ++-- src/compress/flate/inflate.go | 2 +- src/compress/zlib/reader.go | 2 +- src/database/sql/sql_test.go | 2 +- src/go/constant/value.go | 2 +- src/go/parser/parser.go | 2 +- src/go/printer/testdata/parser.go | 2 +- src/math/big/float.go | 2 +- src/net/http/transport_test.go | 2 +- src/net/smtp/smtp_test.go | 4 ++-- src/os/file_windows.go | 2 +- src/os/os_test.go | 2 +- src/runtime/mgc.go | 2 +- src/runtime/proc.go | 2 +- src/runtime/stack.go | 2 +- src/syscall/mksyscall_windows.go | 2 +- src/syscall/syscall_windows.go | 4 ++-- test/closure3.dir/main.go | 2 +- test/closure3.go | 2 +- 40 files changed, 44 insertions(+), 44 deletions(-) diff --git a/misc/cgo/test/callback.go b/misc/cgo/test/callback.go index b88bf134bc..58e126b41b 100644 --- a/misc/cgo/test/callback.go +++ b/misc/cgo/test/callback.go @@ -295,7 +295,7 @@ func goWithString(s string) { } func testCallbackStack(t *testing.T) { - // Make cgo call and callback with different amount of stack stack available. + // Make cgo call and callback with different amount of stack available. // We do not do any explicit checks, just ensure that it does not crash. for _, f := range splitTests { f() diff --git a/misc/cgo/testplugin/unnamed1/main.go b/misc/cgo/testplugin/unnamed1/main.go index 5c1df086d7..caf09c9e89 100644 --- a/misc/cgo/testplugin/unnamed1/main.go +++ b/misc/cgo/testplugin/unnamed1/main.go @@ -9,7 +9,7 @@ import "C" func FuncInt() int { return 1 } -// Add a recursive type to to check that type equality across plugins doesn't +// Add a recursive type to check that type equality across plugins doesn't // crash. See https://golang.org/issues/19258 func FuncRecursive() X { return X{} } diff --git a/misc/cgo/testsanitizers/cc_test.go b/misc/cgo/testsanitizers/cc_test.go index f09ad52cee..218e225429 100644 --- a/misc/cgo/testsanitizers/cc_test.go +++ b/misc/cgo/testsanitizers/cc_test.go @@ -374,7 +374,7 @@ func (c *config) checkRuntime() (skip bool, err error) { } // libcgo.h sets CGO_TSAN if it detects TSAN support in the C compiler. - // Dump the preprocessor defines to check that that works. + // Dump the preprocessor defines to check that works. // (Sometimes it doesn't: see https://golang.org/issue/15983.) cmd, err := cc(c.cFlags...) if err != nil { diff --git a/misc/cgo/testshared/shared_test.go b/misc/cgo/testshared/shared_test.go index 529a2c692f..c3c7a6aab6 100644 --- a/misc/cgo/testshared/shared_test.go +++ b/misc/cgo/testshared/shared_test.go @@ -578,7 +578,7 @@ func TestNotes(t *testing.T) { } // Build a GOPATH package (depBase) into a shared library that links against the goroot -// runtime, another package (dep2) that links against the first, and and an +// runtime, another package (dep2) that links against the first, and an // executable that links against dep2. func TestTwoGopathShlibs(t *testing.T) { goCmd(t, "install", "-buildmode=shared", "-linkshared", "depBase") diff --git a/src/cmd/compile/doc.go b/src/cmd/compile/doc.go index 0dfaacb584..b68314cf73 100644 --- a/src/cmd/compile/doc.go +++ b/src/cmd/compile/doc.go @@ -125,7 +125,7 @@ directive can skip over a directive like any other comment. // For a //line comment, this is the first character of the next line, and // for a /*line comment this is the character position immediately following the closing */. // If no filename is given, the recorded filename is empty if there is also no column number; -// otherwise is is the most recently recorded filename (actual filename or filename specified +// otherwise it is the most recently recorded filename (actual filename or filename specified // by previous line directive). // If a line directive doesn't specify a column number, the column is "unknown" until // the next directive and the compiler does not report column numbers for that range. diff --git a/src/cmd/compile/internal/gc/syntax.go b/src/cmd/compile/internal/gc/syntax.go index eb2ab6b916..ab65ddebb4 100644 --- a/src/cmd/compile/internal/gc/syntax.go +++ b/src/cmd/compile/internal/gc/syntax.go @@ -45,7 +45,7 @@ type Node struct { // - ONAME nodes that refer to local variables use it to identify their stack frame position. // - ODOT, ODOTPTR, and OINDREGSP use it to indicate offset relative to their base address. // - OSTRUCTKEY uses it to store the named field's offset. - // - Named OLITERALs use it to to store their ambient iota value. + // - Named OLITERALs use it to store their ambient iota value. // Possibly still more uses. If you find any, document them. Xoffset int64 diff --git a/src/cmd/compile/internal/gc/walk.go b/src/cmd/compile/internal/gc/walk.go index 5aa2146a8c..1c398ef43c 100644 --- a/src/cmd/compile/internal/gc/walk.go +++ b/src/cmd/compile/internal/gc/walk.go @@ -34,7 +34,7 @@ func walk(fn *Node) { } } - // Propagate the used flag for typeswitch variables up to the NONAME in it's definition. + // Propagate the used flag for typeswitch variables up to the NONAME in its definition. for _, ln := range fn.Func.Dcl { if ln.Op == ONAME && (ln.Class() == PAUTO || ln.Class() == PAUTOHEAP) && ln.Name.Defn != nil && ln.Name.Defn.Op == OTYPESW && ln.Name.Used() { ln.Name.Defn.Left.Name.SetUsed(true) diff --git a/src/cmd/compile/internal/ssa/gen/PPC64.rules b/src/cmd/compile/internal/ssa/gen/PPC64.rules index 7d79c9ad50..21c12591c5 100644 --- a/src/cmd/compile/internal/ssa/gen/PPC64.rules +++ b/src/cmd/compile/internal/ssa/gen/PPC64.rules @@ -956,7 +956,7 @@ (MOVWZreg (MOVDconst [c])) -> (MOVDconst [int64(uint32(c))]) -// Lose widening ops fed to to stores +// Lose widening ops fed to stores (MOVBstore [off] {sym} ptr (MOV(B|BZ|H|HZ|W|WZ)reg x) mem) -> (MOVBstore [off] {sym} ptr x mem) (MOVHstore [off] {sym} ptr (MOV(H|HZ|W|WZ)reg x) mem) -> (MOVHstore [off] {sym} ptr x mem) (MOVWstore [off] {sym} ptr (MOV(W|WZ)reg x) mem) -> (MOVWstore [off] {sym} ptr x mem) diff --git a/src/cmd/compile/internal/ssa/layout.go b/src/cmd/compile/internal/ssa/layout.go index 15e111ae7c..78d5dc77fe 100644 --- a/src/cmd/compile/internal/ssa/layout.go +++ b/src/cmd/compile/internal/ssa/layout.go @@ -12,7 +12,7 @@ func layout(f *Func) { } // Register allocation may use a different order which has constraints -// imposed by the linear-scan algorithm. Note that that f.pass here is +// imposed by the linear-scan algorithm. Note that f.pass here is // regalloc, so the switch is conditional on -d=ssa/regalloc/test=N func layoutRegallocOrder(f *Func) []*Block { diff --git a/src/cmd/compile/internal/ssa/poset.go b/src/cmd/compile/internal/ssa/poset.go index 37b607977c..0e0e2789b1 100644 --- a/src/cmd/compile/internal/ssa/poset.go +++ b/src/cmd/compile/internal/ssa/poset.go @@ -114,7 +114,7 @@ type posetNode struct { // given that non-equality is not transitive, the only effect is that a later call // to SetEqual for the same values will fail. NonEqual checks whether it is known that // the nodes are different, either because SetNonEqual was called before, or because -// we know that that they are strictly ordered. +// we know that they are strictly ordered. // // It is implemented as a forest of DAGs; in each DAG, if node A dominates B, // it means that A Date: Sun, 7 Oct 2018 00:58:08 +0900 Subject: [PATCH 044/240] all: fix typos Change-Id: I775eb4b33422a95f4255799d551c9962d7e181d3 Reviewed-on: https://go-review.googlesource.com/c/140318 Reviewed-by: Robert Griesemer --- src/go/types/typexpr.go | 2 +- src/os/user/cgo_lookup_unix.go | 10 ++++------ 2 files changed, 5 insertions(+), 7 deletions(-) diff --git a/src/go/types/typexpr.go b/src/go/types/typexpr.go index eb0d8e8fb9..0f23345792 100644 --- a/src/go/types/typexpr.go +++ b/src/go/types/typexpr.go @@ -562,7 +562,7 @@ func (check *Checker) interfaceType(ityp *Interface, iface *ast.InterfaceType, d // its position, and because interface method // signatures don't get a receiver via regular // type-checking (there isn't a receiver in the - // the method's AST). Setting the correct receiver + // method's AST). Setting the correct receiver // type is also important for ptrRecv() (see methodset.go). // // TODO(gri) Consider marking methods signatures diff --git a/src/os/user/cgo_lookup_unix.go b/src/os/user/cgo_lookup_unix.go index 210bd6e0b3..ccb2278246 100644 --- a/src/os/user/cgo_lookup_unix.go +++ b/src/os/user/cgo_lookup_unix.go @@ -94,9 +94,8 @@ func lookupUnixUid(uid int) (*User, error) { defer buf.free() err := retryWithBuffer(buf, func() syscall.Errno { - // mygetpwuid_r is a wrapper around getpwuid_r to - // to avoid using uid_t because C.uid_t(uid) for - // unknown reasons doesn't work on linux. + // mygetpwuid_r is a wrapper around getpwuid_r to avoid using uid_t + // because C.uid_t(uid) for unknown reasons doesn't work on linux. return syscall.Errno(C.mygetpwuid_r(C.int(uid), &pwd, (*C.char)(buf.ptr), @@ -175,9 +174,8 @@ func lookupUnixGid(gid int) (*Group, error) { defer buf.free() err := retryWithBuffer(buf, func() syscall.Errno { - // mygetgrgid_r is a wrapper around getgrgid_r to - // to avoid using gid_t because C.gid_t(gid) for - // unknown reasons doesn't work on linux. + // mygetgrgid_r is a wrapper around getgrgid_r to avoid using gid_t + // because C.gid_t(gid) for unknown reasons doesn't work on linux. return syscall.Errno(C.mygetgrgid_r(C.int(gid), &grp, (*C.char)(buf.ptr), From 2bb91e093cb57c5ba5ca71f0d0a63913a07f21f4 Mon Sep 17 00:00:00 2001 From: Lehner Florian Date: Tue, 2 Oct 2018 16:43:56 +0000 Subject: [PATCH 045/240] fmt: add example Sscanf Updates golang/go#27554. Change-Id: I2bf3d57ebeeb5dd50beffbc643a4ad10287b2c1e GitHub-Last-Rev: 4ffae55b4b2ca9d9b2a5b2b6dcef14ce43d83544 GitHub-Pull-Request: golang/go#27954 Reviewed-on: https://go-review.googlesource.com/c/138837 Reviewed-by: Rob Pike Run-TryBot: Rob Pike TryBot-Result: Gobot Gobot --- src/fmt/example_test.go | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/src/fmt/example_test.go b/src/fmt/example_test.go index ecf3391ce7..c285175976 100644 --- a/src/fmt/example_test.go +++ b/src/fmt/example_test.go @@ -63,6 +63,19 @@ func ExampleFscanln() { // 3: ken, 271828, 3.141590 } +func ExampleSscanf() { + var name string + var age int + n, err := fmt.Sscanf("Kim is 22 years old", "%s is %d years old", &name, &age) + if err != nil { + panic(err) + } + fmt.Printf("%d: %s, %d\n", n, name, age) + + // Output: + // 2: Kim, 22 +} + func ExamplePrint() { const name, age = "Kim", 22 fmt.Print(name, " is ", age, " years old.\n") From 165ebaf97bc4c4863a756775d75ddc750c55b8f2 Mon Sep 17 00:00:00 2001 From: ludweeg Date: Sat, 6 Oct 2018 18:38:37 +0300 Subject: [PATCH 046/240] net: simplify bool expression Simplify `!(x <= y)` to `x > y` and `!(x >= y)` to `x < y` where x,y are not defined as float. Change-Id: Id1e5b518395d97e75f96aa4ac5d6c0ee990c0e7d Reviewed-on: https://go-review.googlesource.com/c/140337 Run-TryBot: Mikio Hara TryBot-Result: Gobot Gobot Reviewed-by: Mikio Hara --- src/net/dial_test.go | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/src/net/dial_test.go b/src/net/dial_test.go index 00a84d17d6..3a45c0d2ec 100644 --- a/src/net/dial_test.go +++ b/src/net/dial_test.go @@ -318,9 +318,9 @@ func TestDialParallel(t *testing.T) { expectElapsedMin := tt.expectElapsed - 95*time.Millisecond expectElapsedMax := tt.expectElapsed + 95*time.Millisecond - if !(elapsed >= expectElapsedMin) { + if elapsed < expectElapsedMin { t.Errorf("#%d: got %v; want >= %v", i, elapsed, expectElapsedMin) - } else if !(elapsed <= expectElapsedMax) { + } else if elapsed > expectElapsedMax { t.Errorf("#%d: got %v; want <= %v", i, elapsed, expectElapsedMax) } @@ -418,10 +418,10 @@ func TestDialerFallbackDelay(t *testing.T) { } expectMin := tt.expectElapsed - 1*time.Millisecond expectMax := tt.expectElapsed + 95*time.Millisecond - if !(elapsed >= expectMin) { + if elapsed < expectMin { t.Errorf("#%d: got %v; want >= %v", i, elapsed, expectMin) } - if !(elapsed <= expectMax) { + if elapsed > expectMax { t.Errorf("#%d: got %v; want <= %v", i, elapsed, expectMax) } } From 04dc1b2443f3cec9d3babff1046eb36f41236224 Mon Sep 17 00:00:00 2001 From: Igor Zhilianin Date: Mon, 8 Oct 2018 01:19:51 +0000 Subject: [PATCH 047/240] all: fix a bunch of misspellings Change-Id: I94cebca86706e072fbe3be782d3edbe0e22b9432 GitHub-Last-Rev: 8e15a40545704fb21b41a8768079f2da19341ef3 GitHub-Pull-Request: golang/go#28067 Reviewed-on: https://go-review.googlesource.com/c/140437 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/archive/zip/writer.go | 2 +- src/cmd/asm/internal/asm/testdata/386enc.s | 2 +- src/cmd/asm/internal/asm/testdata/amd64enc_extra.s | 2 +- src/cmd/compile/internal/gc/esc.go | 3 ++- src/cmd/compile/internal/ppc64/ssa.go | 2 +- src/cmd/internal/obj/x86/evex.go | 2 +- src/cmd/link/internal/ld/lib.go | 2 +- src/cmd/vet/vet_test.go | 4 ++-- src/database/sql/sql_test.go | 2 +- src/net/http/transfer.go | 2 +- src/runtime/mheap.go | 2 +- src/runtime/sys_linux_ppc64x.s | 2 +- test/run.go | 4 ++-- 13 files changed, 16 insertions(+), 15 deletions(-) diff --git a/src/archive/zip/writer.go b/src/archive/zip/writer.go index 5f0c0a1a55..cdc534eaf0 100644 --- a/src/archive/zip/writer.go +++ b/src/archive/zip/writer.go @@ -178,7 +178,7 @@ func (w *Writer) Close() error { return err } - // store max values in the regular end record to signal that + // store max values in the regular end record to signal // that the zip64 values should be used instead records = uint16max size = uint32max diff --git a/src/cmd/asm/internal/asm/testdata/386enc.s b/src/cmd/asm/internal/asm/testdata/386enc.s index 15d1705c97..4af6de36d1 100644 --- a/src/cmd/asm/internal/asm/testdata/386enc.s +++ b/src/cmd/asm/internal/asm/testdata/386enc.s @@ -18,7 +18,7 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0 MOVL -2147483648(AX), AX // 8b8000000080 ADDL 2147483648(AX), AX // 038000000080 ADDL -2147483648(AX), AX // 038000000080 - // Make sure MOV CR/DR continues to work after changing it's movtabs. + // Make sure MOV CR/DR continues to work after changing its movtabs. MOVL CR0, AX // 0f20c0 MOVL CR0, DX // 0f20c2 MOVL CR4, DI // 0f20e7 diff --git a/src/cmd/asm/internal/asm/testdata/amd64enc_extra.s b/src/cmd/asm/internal/asm/testdata/amd64enc_extra.s index 2f0d9ecf86..d7afecc230 100644 --- a/src/cmd/asm/internal/asm/testdata/amd64enc_extra.s +++ b/src/cmd/asm/internal/asm/testdata/amd64enc_extra.s @@ -302,7 +302,7 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0 // Check that LEAL is permitted to use overflowing offset. LEAL 2400959708(BP)(R10*1), BP // 428dac15dcbc1b8f LEAL 3395469782(AX)(R10*1), AX // 428d8410d6c162ca - // Make sure MOV CR/DR continues to work after changing it's movtabs. + // Make sure MOV CR/DR continues to work after changing its movtabs. MOVQ CR0, AX // 0f20c0 MOVQ CR0, DX // 0f20c2 MOVQ CR4, DI // 0f20e7 diff --git a/src/cmd/compile/internal/gc/esc.go b/src/cmd/compile/internal/gc/esc.go index 94190f0020..eba66d9c67 100644 --- a/src/cmd/compile/internal/gc/esc.go +++ b/src/cmd/compile/internal/gc/esc.go @@ -946,7 +946,8 @@ opSwitch: case OCALLMETH, OCALLFUNC, OCALLINTER: e.esccall(n, parent) - // esccall already done on n.Rlist.First(). tie it's Retval to n.List + // esccall already done on n.Rlist.First() + // tie its Retval to n.List case OAS2FUNC: // x,y = f() rs := e.nodeEscState(n.Rlist.First()).Retval.Slice() where := n diff --git a/src/cmd/compile/internal/ppc64/ssa.go b/src/cmd/compile/internal/ppc64/ssa.go index 0a7238850c..bd6ffbce53 100644 --- a/src/cmd/compile/internal/ppc64/ssa.go +++ b/src/cmd/compile/internal/ppc64/ssa.go @@ -967,7 +967,7 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { case ssa.OpPPC64LoweredMove: // This will be used when moving more - // than 8 bytes. Moves start with as + // than 8 bytes. Moves start with // as many 8 byte moves as possible, then // 4, 2, or 1 byte(s) as remaining. This will // work and be efficient for power8 or later. diff --git a/src/cmd/internal/obj/x86/evex.go b/src/cmd/internal/obj/x86/evex.go index 30c0e62e0f..d8867283fa 100644 --- a/src/cmd/internal/obj/x86/evex.go +++ b/src/cmd/internal/obj/x86/evex.go @@ -194,7 +194,7 @@ func newEVEXSuffix() evexSuffix { return evexSuffix{rounding: rcUnset} } -// evexSuffixMap maps obj.X86suffix to it's decoded version. +// evexSuffixMap maps obj.X86suffix to its decoded version. // Filled during init(). var evexSuffixMap [255]evexSuffix diff --git a/src/cmd/link/internal/ld/lib.go b/src/cmd/link/internal/ld/lib.go index 8f3326d8cd..2284c347dc 100644 --- a/src/cmd/link/internal/ld/lib.go +++ b/src/cmd/link/internal/ld/lib.go @@ -646,7 +646,7 @@ func (ctxt *Link) loadlib() { // // These are the symbols that begin with the prefix 'type.' and // contain run-time type information used by the runtime and reflect -// packages. All Go binaries contain these symbols, but only only +// packages. All Go binaries contain these symbols, but only // those programs loaded dynamically in multiple parts need these // symbols to have entries in the symbol table. func (ctxt *Link) mangleTypeSym() { diff --git a/src/cmd/vet/vet_test.go b/src/cmd/vet/vet_test.go index df84d6cc98..6b2125924d 100644 --- a/src/cmd/vet/vet_test.go +++ b/src/cmd/vet/vet_test.go @@ -232,10 +232,10 @@ func TestVetVerbose(t *testing.T) { // this function will report an error. // Likewise if outStr does not have an error for a line which has a comment, // or if the error message does not match the . -// The syntax is Perl but its best to stick to egrep. +// The syntax is Perl but it's best to stick to egrep. // // Sources files are supplied as fullshort slice. -// It consists of pairs: full path to source file and it's base name. +// It consists of pairs: full path to source file and its base name. func errorCheck(outStr string, wantAuto bool, fullshort ...string) (err error) { var errs []error out := splitOutput(outStr, wantAuto) diff --git a/src/database/sql/sql_test.go b/src/database/sql/sql_test.go index 1be9f770f1..82f3f316c6 100644 --- a/src/database/sql/sql_test.go +++ b/src/database/sql/sql_test.go @@ -597,7 +597,7 @@ func TestPoolExhaustOnCancel(t *testing.T) { state := 0 // waiter will be called for all queries, including - // initial setup queries. The state is only assigned when no + // initial setup queries. The state is only assigned when // no queries are made. // // Only allow the first batch of queries to finish once the diff --git a/src/net/http/transfer.go b/src/net/http/transfer.go index 2c6ba3231b..a41d034204 100644 --- a/src/net/http/transfer.go +++ b/src/net/http/transfer.go @@ -942,7 +942,7 @@ func (b *body) Close() error { // no trailer and closing the connection next. // no point in reading to EOF. case b.doEarlyClose: - // Read up to maxPostHandlerReadBytes bytes of the body, looking for + // Read up to maxPostHandlerReadBytes bytes of the body, looking // for EOF (and trailers), so we can re-use this connection. if lr, ok := b.src.(*io.LimitedReader); ok && lr.N > maxPostHandlerReadBytes { // There was a declared Content-Length, and we have more bytes remaining diff --git a/src/runtime/mheap.go b/src/runtime/mheap.go index b92e27e4e0..1d672cdf21 100644 --- a/src/runtime/mheap.go +++ b/src/runtime/mheap.go @@ -673,7 +673,7 @@ func (h *mheap) alloc_m(npage uintptr, spanclass spanClass, large bool) *mspan { // TODO(austin): This tends to sweep a large number of // spans in order to find a few completely free spans // (for example, in the garbage benchmark, this sweeps - // ~30x the number of pages its trying to allocate). + // ~30x the number of pages it's trying to allocate). // If GC kept a bit for whether there were any marks // in a span, we could release these free spans // at the end of GC and eliminate this entirely. diff --git a/src/runtime/sys_linux_ppc64x.s b/src/runtime/sys_linux_ppc64x.s index ed79b69257..5b5df50d41 100644 --- a/src/runtime/sys_linux_ppc64x.s +++ b/src/runtime/sys_linux_ppc64x.s @@ -320,7 +320,7 @@ TEXT runtime·_sigtramp(SB),NOSPLIT,$64 TEXT runtime·cgoSigtramp(SB),NOSPLIT|NOFRAME,$0 // The stack unwinder, presumably written in C, may not be able to // handle Go frame correctly. So, this function is NOFRAME, and we - // we save/restore LR manually. + // save/restore LR manually. MOVD LR, R10 // We're coming from C code, initialize essential registers. diff --git a/test/run.go b/test/run.go index 3af6d1466b..0974e9fdb8 100644 --- a/test/run.go +++ b/test/run.go @@ -1071,10 +1071,10 @@ func splitOutput(out string, wantAuto bool) []string { // this function will report an error. // Likewise if outStr does not have an error for a line which has a comment, // or if the error message does not match the . -// The syntax is Perl but its best to stick to egrep. +// The syntax is Perl but it's best to stick to egrep. // // Sources files are supplied as fullshort slice. -// It consists of pairs: full path to source file and it's base name. +// It consists of pairs: full path to source file and its base name. func (t *test) errorCheck(outStr string, wantAuto bool, fullshort ...string) (err error) { defer func() { if *verbose && err != nil { From 7c3b324d265905eec137d92e3a0a9041cad3679d Mon Sep 17 00:00:00 2001 From: Alex Brainman Date: Sun, 7 Oct 2018 11:22:57 +1100 Subject: [PATCH 048/240] net: skip TestUnixConnLocalWindows on windows/arm Similarly to CL 138676, skip TestUnixConnLocalWindows on windows/arm. Fixes #28061 Change-Id: I2270d2f9d268e85ea567be0c0c37c48e4d482282 Reviewed-on: https://go-review.googlesource.com/c/140397 Run-TryBot: Alex Brainman Reviewed-by: Ian Lance Taylor --- src/net/unixsock_windows_test.go | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/net/unixsock_windows_test.go b/src/net/unixsock_windows_test.go index d856e3fd81..5dccc14653 100644 --- a/src/net/unixsock_windows_test.go +++ b/src/net/unixsock_windows_test.go @@ -34,8 +34,11 @@ func isBuild17063() bool { } func TestUnixConnLocalWindows(t *testing.T) { - if runtime.GOARCH == "386" { + switch runtime.GOARCH { + case "386": t.Skip("not supported on windows/386, see golang.org/issue/27943") + case "arm": + t.Skip("not supported on windows/arm, see golang.org/issue/28061") } if !isBuild17063() { t.Skip("unix test") From 26d22609c389cd9b5a21939183b6411e5861e16b Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Tue, 2 Oct 2018 15:55:38 -0700 Subject: [PATCH 049/240] spec: distinguish between explicit and implicit conversions (clarification) The spec used the term "conversion" somewhat indiscriminately for explicit conversions that appear literally in the source, and implicit conversions that are implied by the context of an expression. Be clearer about it by defining the terms. Also, state that integer to string conversions of the form string(x) are never implicit. This clarifies situations where implicit conversions might require an integer to change to a string (but don't and never have done so). See line 3948. Fixes #26313. Change-Id: I8939466df6b5950933ae7c987662ef9f88827fda Reviewed-on: https://go-review.googlesource.com/c/139099 Reviewed-by: Rob Pike Reviewed-by: Ian Lance Taylor --- doc/go_spec.html | 39 +++++++++++++++++++++++---------------- 1 file changed, 23 insertions(+), 16 deletions(-) diff --git a/doc/go_spec.html b/doc/go_spec.html index 32336e86f8..6c7f2aa902 100644 --- a/doc/go_spec.html +++ b/doc/go_spec.html @@ -1,6 +1,6 @@ @@ -811,7 +811,7 @@ To avoid portability issues all numeric types are de types and thus distinct except byte, which is an alias for uint8, and rune, which is an alias for int32. -Conversions +Explicit conversions are required when different numeric types are mixed in an expression or assignment. For instance, int32 and int are not the same type even though they may have the same size on a @@ -1348,7 +1348,7 @@ ChannelType = ( "chan" | "chan" "<-" | "<-" "chan" ) ElementType . The optional <- operator specifies the channel direction, send or receive. If no direction is given, the channel is bidirectional. -A channel may be constrained only to send or only to receive by +A channel may be constrained only to send or only to receive by explicit conversion or assignment.

@@ -2069,9 +2069,9 @@ Otherwise, each variable is initialized to its zero va If a type is present, each variable is given that type. Otherwise, each variable is given the type of the corresponding initialization value in the assignment. -If that value is an untyped constant, it is first +If that value is an untyped constant, it is first implicitly converted to its default type; -if it is an untyped boolean value, it is first converted to type bool. +if it is an untyped boolean value, it is first implicitly converted to type bool. The predeclared value nil cannot be used to initialize a variable with no explicit type.

@@ -3433,7 +3433,7 @@ For operations involving constants only, see the section on

Except for shift operations, if one operand is an untyped constant -and the other operand is not, the constant is converted +and the other operand is not, the constant is implicitly converted to the type of the other operand.

@@ -3442,7 +3442,7 @@ The right operand in a shift expression must have unsigned integer type or be an untyped constant representable by a value of type uint. If the left operand of a non-constant shift expression is an untyped constant, -it is first converted to the type it would assume if the shift expression were +it is first implicitly converted to the type it would assume if the shift expression were replaced by its left operand alone.

@@ -3645,7 +3645,7 @@ occurs is implementation-specific. An implementation may combine multiple floating-point operations into a single fused operation, possibly across statements, and produce a result that differs from the value obtained by executing and rounding the instructions individually. -A floating-point type conversion explicitly rounds to +An explicit floating-point type conversion rounds to the precision of the target type, preventing fusion that would discard that rounding.

@@ -3907,7 +3907,14 @@ channel is closed and empty.

Conversions

-Conversions are expressions of the form T(x) +A conversion changes the type of an expression +to the type specified by the conversion. +A conversion may appear literally in the source, or it may be implied +by the context in which an expression appears. +

+ +

+An explicit conversion is an expression of the form T(x) where T is a type and x is an expression that can be converted to type T.

@@ -3938,7 +3945,7 @@ func() int(x) // x is converted to func() int (unambiguous) A constant value x can be converted to type T if x is representable by a value of T. -As a special case, an integer constant x can be converted to a +As a special case, an integer constant x can be explicitly converted to a string type using the same rule as for non-constant x. @@ -4672,13 +4679,13 @@ to the type of the operand to which it is assigned, with the following special c
  • If an untyped constant is assigned to a variable of interface type or the blank identifier, - the constant is first converted to its + the constant is first implicitly converted to its default type.
  • If an untyped boolean value is assigned to a variable of interface type or - the blank identifier, it is first converted to type bool. + the blank identifier, it is first implicitly converted to type bool.
    • @@ -4764,14 +4771,14 @@ ExprSwitchCase = "case" ExpressionList | "default" .

    -If the switch expression evaluates to an untyped constant, it is first +If the switch expression evaluates to an untyped constant, it is first implicitly converted to its default type; -if it is an untyped boolean value, it is first converted to type bool. +if it is an untyped boolean value, it is first implicitly converted to type bool. The predeclared untyped value nil cannot be used as a switch expression.

    -If a case expression is untyped, it is first converted +If a case expression is untyped, it is first implicitly converted to the type of the switch expression. For each (possibly converted) case expression x and the value t of the switch expression, x == t must be a valid comparison. @@ -5881,7 +5888,7 @@ floating-point type and the return type is the complex type with the corresponding floating-point constituents: complex64 for float32 arguments, and complex128 for float64 arguments. -If one of the arguments evaluates to an untyped constant, it is first +If one of the arguments evaluates to an untyped constant, it is first implicitly converted to the type of the other argument. If both arguments evaluate to untyped constants, they must be non-complex numbers or their imaginary parts must be zero, and the return value of From e99082fc409234ebfe4683f488c9b1f41278cf0a Mon Sep 17 00:00:00 2001 From: Richard Musiol Date: Mon, 8 Oct 2018 17:52:52 +0200 Subject: [PATCH 050/240] misc/wasm: fix fs operations in browser The commit 0e4c013 changed the syscall package so it uses the asynchronous functions of Node.js's fs module. This commit adapts the stubs of the fs module which are used when using a browser instead of Node.js. Fixes #28068. Change-Id: Ic3a6a8aebb0db06402383bc2fea7642a4501e02c Reviewed-on: https://go-review.googlesource.com/c/140537 Reviewed-by: Agniva De Sarker Reviewed-by: Brad Fitzpatrick Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- misc/wasm/wasm_exec.js | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/misc/wasm/wasm_exec.js b/misc/wasm/wasm_exec.js index 94b9552c59..815b3fbeff 100644 --- a/misc/wasm/wasm_exec.js +++ b/misc/wasm/wasm_exec.js @@ -47,10 +47,17 @@ } return buf.length; }, - openSync(path, flags, mode) { + write(fd, buf, offset, length, position, callback) { + if (offset !== 0 || length !== buf.length || position !== null) { + throw new Error("not implemented"); + } + const n = this.writeSync(fd, buf); + callback(null, n); + }, + open(path, flags, mode, callback) { const err = new Error("not implemented"); err.code = "ENOSYS"; - throw err; + callback(err); }, }; } From 2afdd17e3f0a453ba330352a7221f4fa9bef19b2 Mon Sep 17 00:00:00 2001 From: Urvil Patel Date: Tue, 25 Sep 2018 13:44:45 +0530 Subject: [PATCH 051/240] strconv: add example for QuoteRuneToGraphic and QuoteToGraphic functions Change-Id: Ie5b2ef0087dbc7b8191de8c8b4190396631e3c7f Reviewed-on: https://go-review.googlesource.com/c/137215 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/strconv/example_test.go | 40 +++++++++++++++++++++++++++++++++++-- 1 file changed, 38 insertions(+), 2 deletions(-) diff --git a/src/strconv/example_test.go b/src/strconv/example_test.go index 15725456e2..2d1a2a9dbf 100644 --- a/src/strconv/example_test.go +++ b/src/strconv/example_test.go @@ -265,7 +265,7 @@ func ExampleParseUint() { } func ExampleQuote() { - s := strconv.Quote(`"Fran & Freddie's Diner ☺"`) + s := strconv.Quote(`"Fran & Freddie's Diner ☺"`) // there is a tab character inside the string literal fmt.Println(s) // Output: @@ -288,14 +288,50 @@ func ExampleQuoteRuneToASCII() { // '\u263a' } +func ExampleQuoteRuneToGraphic() { + s := strconv.QuoteRuneToGraphic('☺') + fmt.Println(s) + + s = strconv.QuoteRuneToGraphic('\u263a') + fmt.Println(s) + + s = strconv.QuoteRuneToGraphic('\u000a') + fmt.Println(s) + + s = strconv.QuoteRuneToGraphic(' ') // tab character + fmt.Println(s) + + // Output: + // '☺' + // '☺' + // '\n' + // '\t' +} + func ExampleQuoteToASCII() { - s := strconv.QuoteToASCII(`"Fran & Freddie's Diner ☺"`) + s := strconv.QuoteToASCII(`"Fran & Freddie's Diner ☺"`) // there is a tab character inside the string literal fmt.Println(s) // Output: // "\"Fran & Freddie's Diner\t\u263a\"" } +func ExampleQuoteToGraphic() { + s := strconv.QuoteToGraphic("☺") + fmt.Println(s) + + s = strconv.QuoteToGraphic("This is a \u263a \u000a") // there is a tab character inside the string literal + fmt.Println(s) + + s = strconv.QuoteToGraphic(`" This is a ☺ \n "`) + fmt.Println(s) + + // Output: + // "☺" + // "This is a ☺\t\n" + // "\" This is a ☺ \\n \"" +} + func ExampleUnquote() { s, err := strconv.Unquote("You can't unquote a string without quotes") fmt.Printf("%q, %v\n", s, err) From 393330255024d77c963910b2e2de918b5027a17f Mon Sep 17 00:00:00 2001 From: Ben Shi Date: Sat, 6 Oct 2018 13:13:48 +0000 Subject: [PATCH 052/240] cmd/compile: add indexed form for several 386 instructions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This CL implements indexed memory operands for the following instructions. (ADD|SUB|MUL|AND|OR|XOR)Lload -> (ADD|SUB|MUL|AND|OR|XOR)Lloadidx4 (ADD|SUB|AND|OR|XOR)Lmodify -> (ADD|SUB|AND|OR|XOR)Lmodifyidx4 (ADD|AND|OR|XOR)Lconstmodify -> (ADD|AND|OR|XOR)Lconstmodifyidx4 1. The total size of pkg/linux_386/ decreases about 2.5KB, excluding cmd/compile/ . 2. There is little regression in the go1 benchmark test, excluding noise. name old time/op new time/op delta BinaryTree17-4 3.25s ± 3% 3.25s ± 3% ~ (p=0.218 n=40+40) Fannkuch11-4 3.53s ± 1% 3.53s ± 1% ~ (p=0.303 n=40+40) FmtFprintfEmpty-4 44.9ns ± 3% 45.6ns ± 3% +1.48% (p=0.030 n=40+36) FmtFprintfString-4 78.7ns ± 5% 80.1ns ± 7% ~ (p=0.217 n=36+40) FmtFprintfInt-4 90.2ns ± 6% 89.8ns ± 5% ~ (p=0.659 n=40+38) FmtFprintfIntInt-4 140ns ± 5% 141ns ± 5% +1.00% (p=0.027 n=40+40) FmtFprintfPrefixedInt-4 185ns ± 3% 183ns ± 3% ~ (p=0.104 n=40+40) FmtFprintfFloat-4 411ns ± 4% 406ns ± 3% -1.37% (p=0.005 n=40+40) FmtManyArgs-4 590ns ± 4% 598ns ± 4% +1.35% (p=0.008 n=40+40) GobDecode-4 7.16ms ± 5% 7.10ms ± 5% ~ (p=0.335 n=40+40) GobEncode-4 6.85ms ± 7% 6.74ms ± 9% ~ (p=0.058 n=38+40) Gzip-4 400ms ± 4% 399ms ± 2% -0.34% (p=0.003 n=40+33) Gunzip-4 41.4ms ± 3% 41.4ms ± 4% -0.12% (p=0.020 n=40+40) HTTPClientServer-4 64.1µs ± 4% 63.5µs ± 2% -1.07% (p=0.000 n=39+37) JSONEncode-4 15.9ms ± 2% 15.9ms ± 3% ~ (p=0.103 n=40+40) JSONDecode-4 62.2ms ± 4% 61.6ms ± 3% -0.98% (p=0.006 n=39+40) Mandelbrot200-4 5.18ms ± 3% 5.14ms ± 4% ~ (p=0.125 n=40+40) GoParse-4 3.29ms ± 2% 3.27ms ± 2% -0.66% (p=0.006 n=40+40) RegexpMatchEasy0_32-4 103ns ± 4% 103ns ± 4% ~ (p=0.632 n=40+40) RegexpMatchEasy0_1K-4 830ns ± 3% 828ns ± 3% ~ (p=0.563 n=40+40) RegexpMatchEasy1_32-4 113ns ± 4% 113ns ± 4% ~ (p=0.494 n=40+40) RegexpMatchEasy1_1K-4 1.03µs ± 4% 1.03µs ± 4% ~ (p=0.665 n=40+40) RegexpMatchMedium_32-4 130ns ± 4% 129ns ± 3% ~ (p=0.458 n=40+40) RegexpMatchMedium_1K-4 39.4µs ± 3% 39.7µs ± 3% ~ (p=0.825 n=40+40) RegexpMatchHard_32-4 2.16µs ± 4% 2.15µs ± 4% ~ (p=0.137 n=40+40) RegexpMatchHard_1K-4 65.2µs ± 3% 65.4µs ± 4% ~ (p=0.160 n=40+40) Revcomp-4 1.87s ± 2% 1.87s ± 1% +0.17% (p=0.019 n=33+33) Template-4 69.4ms ± 3% 69.8ms ± 3% +0.60% (p=0.009 n=40+40) TimeParse-4 437ns ± 4% 438ns ± 4% ~ (p=0.234 n=40+40) TimeFormat-4 408ns ± 3% 408ns ± 3% ~ (p=0.904 n=40+40) [Geo mean] 65.7µs 65.6µs -0.08% name old speed new speed delta GobDecode-4 107MB/s ± 5% 108MB/s ± 5% ~ (p=0.336 n=40+40) GobEncode-4 112MB/s ± 6% 114MB/s ± 9% +1.95% (p=0.036 n=37+40) Gzip-4 48.5MB/s ± 4% 48.6MB/s ± 2% +0.28% (p=0.003 n=40+33) Gunzip-4 469MB/s ± 4% 469MB/s ± 4% +0.11% (p=0.021 n=40+40) JSONEncode-4 122MB/s ± 2% 122MB/s ± 3% ~ (p=0.105 n=40+40) JSONDecode-4 31.2MB/s ± 4% 31.5MB/s ± 4% +0.99% (p=0.007 n=39+40) GoParse-4 17.6MB/s ± 2% 17.7MB/s ± 2% +0.66% (p=0.007 n=40+40) RegexpMatchEasy0_32-4 310MB/s ± 4% 310MB/s ± 4% ~ (p=0.384 n=40+40) RegexpMatchEasy0_1K-4 1.23GB/s ± 3% 1.24GB/s ± 3% ~ (p=0.186 n=40+40) RegexpMatchEasy1_32-4 283MB/s ± 3% 281MB/s ± 4% ~ (p=0.855 n=40+40) RegexpMatchEasy1_1K-4 1.00GB/s ± 4% 1.00GB/s ± 4% ~ (p=0.665 n=40+40) RegexpMatchMedium_32-4 7.68MB/s ± 4% 7.73MB/s ± 3% ~ (p=0.359 n=40+40) RegexpMatchMedium_1K-4 26.0MB/s ± 3% 25.8MB/s ± 3% ~ (p=0.825 n=40+40) RegexpMatchHard_32-4 14.8MB/s ± 3% 14.9MB/s ± 4% ~ (p=0.136 n=40+40) RegexpMatchHard_1K-4 15.7MB/s ± 3% 15.7MB/s ± 4% ~ (p=0.150 n=40+40) Revcomp-4 136MB/s ± 1% 136MB/s ± 1% -0.09% (p=0.028 n=32+33) Template-4 28.0MB/s ± 3% 27.8MB/s ± 3% -0.59% (p=0.010 n=40+40) [Geo mean] 82.1MB/s 82.3MB/s +0.25% Change-Id: Ifa387a251056678326d3508aa02753b70bf7e5d0 Reviewed-on: https://go-review.googlesource.com/c/140303 Run-TryBot: Ben Shi TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/cmd/compile/internal/ssa/gen/386.rules | 37 + src/cmd/compile/internal/ssa/gen/386Ops.go | 29 +- src/cmd/compile/internal/ssa/opGen.go | 275 ++ src/cmd/compile/internal/ssa/rewrite386.go | 2837 +++++++++++++++++++- src/cmd/compile/internal/x86/ssa.go | 25 +- test/codegen/arithmetic.go | 9 +- 6 files changed, 3183 insertions(+), 29 deletions(-) diff --git a/src/cmd/compile/internal/ssa/gen/386.rules b/src/cmd/compile/internal/ssa/gen/386.rules index c817994add..0df8911f39 100644 --- a/src/cmd/compile/internal/ssa/gen/386.rules +++ b/src/cmd/compile/internal/ssa/gen/386.rules @@ -627,14 +627,26 @@ ((ADD|SUB|MUL|AND|OR|XOR)Lload [off1] {sym} val (ADDLconst [off2] base) mem) && is32Bit(off1+off2) -> ((ADD|SUB|MUL|AND|OR|XOR)Lload [off1+off2] {sym} val base mem) +((ADD|SUB|MUL|AND|OR|XOR)Lloadidx4 [off1] {sym} val (ADDLconst [off2] base) idx mem) && is32Bit(off1+off2) -> + ((ADD|SUB|MUL|AND|OR|XOR)Lloadidx4 [off1+off2] {sym} val base idx mem) +((ADD|SUB|MUL|AND|OR|XOR)Lloadidx4 [off1] {sym} val base (ADDLconst [off2] idx) mem) && is32Bit(off1+off2*4) -> + ((ADD|SUB|MUL|AND|OR|XOR)Lloadidx4 [off1+off2*4] {sym} val base idx mem) ((ADD|SUB|MUL|DIV)SSload [off1] {sym} val (ADDLconst [off2] base) mem) && is32Bit(off1+off2) -> ((ADD|SUB|MUL|DIV)SSload [off1+off2] {sym} val base mem) ((ADD|SUB|MUL|DIV)SDload [off1] {sym} val (ADDLconst [off2] base) mem) && is32Bit(off1+off2) -> ((ADD|SUB|MUL|DIV)SDload [off1+off2] {sym} val base mem) ((ADD|SUB|AND|OR|XOR)Lmodify [off1] {sym} (ADDLconst [off2] base) val mem) && is32Bit(off1+off2) -> ((ADD|SUB|AND|OR|XOR)Lmodify [off1+off2] {sym} base val mem) +((ADD|SUB|AND|OR|XOR)Lmodifyidx4 [off1] {sym} (ADDLconst [off2] base) idx val mem) && is32Bit(off1+off2) -> + ((ADD|SUB|AND|OR|XOR)Lmodifyidx4 [off1+off2] {sym} base idx val mem) +((ADD|SUB|AND|OR|XOR)Lmodifyidx4 [off1] {sym} base (ADDLconst [off2] idx) val mem) && is32Bit(off1+off2*4) -> + ((ADD|SUB|AND|OR|XOR)Lmodifyidx4 [off1+off2*4] {sym} base idx val mem) ((ADD|AND|OR|XOR)Lconstmodify [valoff1] {sym} (ADDLconst [off2] base) mem) && ValAndOff(valoff1).canAdd(off2) -> ((ADD|AND|OR|XOR)Lconstmodify [ValAndOff(valoff1).add(off2)] {sym} base mem) +((ADD|AND|OR|XOR)Lconstmodifyidx4 [valoff1] {sym} (ADDLconst [off2] base) idx mem) && ValAndOff(valoff1).canAdd(off2) -> + ((ADD|AND|OR|XOR)Lconstmodifyidx4 [ValAndOff(valoff1).add(off2)] {sym} base idx mem) +((ADD|AND|OR|XOR)Lconstmodifyidx4 [valoff1] {sym} base (ADDLconst [off2] idx) mem) && ValAndOff(valoff1).canAdd(off2*4) -> + ((ADD|AND|OR|XOR)Lconstmodifyidx4 [ValAndOff(valoff1).add(off2*4)] {sym} base idx mem) // Fold constants into stores. (MOVLstore [off] {sym} ptr (MOVLconst [c]) mem) && validOff(off) -> @@ -690,6 +702,9 @@ ((ADD|SUB|MUL|AND|OR|XOR)Lload [off1] {sym1} val (LEAL [off2] {sym2} base) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) -> ((ADD|SUB|MUL|AND|OR|XOR)Lload [off1+off2] {mergeSym(sym1,sym2)} val base mem) +((ADD|SUB|MUL|AND|OR|XOR)Lloadidx4 [off1] {sym1} val (LEAL [off2] {sym2} base) idx mem) + && is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) -> + ((ADD|SUB|MUL|AND|OR|XOR)Lloadidx4 [off1+off2] {mergeSym(sym1,sym2)} val base idx mem) ((ADD|SUB|MUL|DIV)SSload [off1] {sym1} val (LEAL [off2] {sym2} base) mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) -> ((ADD|SUB|MUL|DIV)SSload [off1+off2] {mergeSym(sym1,sym2)} val base mem) @@ -699,9 +714,15 @@ ((ADD|SUB|AND|OR|XOR)Lmodify [off1] {sym1} (LEAL [off2] {sym2} base) val mem) && is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) -> ((ADD|SUB|AND|OR|XOR)Lmodify [off1+off2] {mergeSym(sym1,sym2)} base val mem) +((ADD|SUB|AND|OR|XOR)Lmodifyidx4 [off1] {sym1} (LEAL [off2] {sym2} base) idx val mem) + && is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) -> + ((ADD|SUB|AND|OR|XOR)Lmodifyidx4 [off1+off2] {mergeSym(sym1,sym2)} base idx val mem) ((ADD|AND|OR|XOR)Lconstmodify [valoff1] {sym1} (LEAL [off2] {sym2} base) mem) && ValAndOff(valoff1).canAdd(off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) -> ((ADD|AND|OR|XOR)Lconstmodify [ValAndOff(valoff1).add(off2)] {mergeSym(sym1,sym2)} base mem) +((ADD|AND|OR|XOR)Lconstmodifyidx4 [valoff1] {sym1} (LEAL [off2] {sym2} base) idx mem) + && ValAndOff(valoff1).canAdd(off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) -> + ((ADD|AND|OR|XOR)Lconstmodifyidx4 [ValAndOff(valoff1).add(off2)] {mergeSym(sym1,sym2)} base idx mem) (MOV(B|W|L|SS|SD)load [off] {sym} (ADDL ptr idx) mem) && ptr.Op != OpSB -> (MOV(B|W|L|SS|SD)loadidx1 [off] {sym} ptr idx mem) (MOV(B|W|L|SS|SD)store [off] {sym} (ADDL ptr idx) val mem) && ptr.Op != OpSB -> (MOV(B|W|L|SS|SD)storeidx1 [off] {sym} ptr idx val mem) @@ -746,14 +767,30 @@ // Merge load/store to op ((ADD|AND|OR|XOR|SUB|MUL)L x l:(MOVLload [off] {sym} ptr mem)) && canMergeLoad(v, l, x) && clobber(l) -> ((ADD|AND|OR|XOR|SUB|MUL)Lload x [off] {sym} ptr mem) +((ADD|AND|OR|XOR|SUB|MUL)L x l:(MOVLloadidx4 [off] {sym} ptr idx mem)) && canMergeLoad(v, l, x) && clobber(l) -> + ((ADD|AND|OR|XOR|SUB|MUL)Lloadidx4 x [off] {sym} ptr idx mem) +((ADD|SUB|MUL|AND|OR|XOR)Lload [off1] {sym1} val (LEAL4 [off2] {sym2} ptr idx) mem) + && is32Bit(off1+off2) && canMergeSym(sym1, sym2) -> + ((ADD|SUB|MUL|AND|OR|XOR)Lloadidx4 [off1+off2] {mergeSym(sym1,sym2)} val ptr idx mem) ((ADD|SUB|MUL|DIV)SD x l:(MOVSDload [off] {sym} ptr mem)) && canMergeLoad(v, l, x) && !config.use387 && clobber(l) -> ((ADD|SUB|MUL|DIV)SDload x [off] {sym} ptr mem) ((ADD|SUB|MUL|DIV)SS x l:(MOVSSload [off] {sym} ptr mem)) && canMergeLoad(v, l, x) && !config.use387 && clobber(l) -> ((ADD|SUB|MUL|DIV)SSload x [off] {sym} ptr mem) (MOVLstore {sym} [off] ptr y:((ADD|AND|OR|XOR)Lload x [off] {sym} ptr mem) mem) && y.Uses==1 && clobber(y) -> ((ADD|AND|OR|XOR)Lmodify [off] {sym} ptr x mem) (MOVLstore {sym} [off] ptr y:((ADD|SUB|AND|OR|XOR)L l:(MOVLload [off] {sym} ptr mem) x) mem) && y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) -> ((ADD|SUB|AND|OR|XOR)Lmodify [off] {sym} ptr x mem) +(MOVLstoreidx4 {sym} [off] ptr idx y:((ADD|AND|OR|XOR)Lloadidx4 x [off] {sym} ptr idx mem) mem) && y.Uses==1 && clobber(y) -> + ((ADD|AND|OR|XOR)Lmodifyidx4 [off] {sym} ptr idx x mem) +(MOVLstoreidx4 {sym} [off] ptr idx y:((ADD|SUB|AND|OR|XOR)L l:(MOVLloadidx4 [off] {sym} ptr idx mem) x) mem) && y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) -> + ((ADD|SUB|AND|OR|XOR)Lmodifyidx4 [off] {sym} ptr idx x mem) (MOVLstore {sym} [off] ptr y:((ADD|AND|OR|XOR)Lconst [c] l:(MOVLload [off] {sym} ptr mem)) mem) && y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) && validValAndOff(c,off) -> ((ADD|AND|OR|XOR)Lconstmodify [makeValAndOff(c,off)] {sym} ptr mem) +(MOVLstoreidx4 {sym} [off] ptr idx y:((ADD|AND|OR|XOR)Lconst [c] l:(MOVLloadidx4 [off] {sym} ptr idx mem)) mem) + && y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) && validValAndOff(c,off) -> + ((ADD|AND|OR|XOR)Lconstmodifyidx4 [makeValAndOff(c,off)] {sym} ptr idx mem) +((ADD|AND|OR|XOR)Lmodifyidx4 [off] {sym} ptr idx (MOVLconst [c]) mem) && validValAndOff(c,off) -> + ((ADD|AND|OR|XOR)Lconstmodifyidx4 [makeValAndOff(c,off)] {sym} ptr idx mem) +(SUBLmodifyidx4 [off] {sym} ptr idx (MOVLconst [c]) mem) && validValAndOff(-c,off) -> + (ADDLconstmodifyidx4 [makeValAndOff(-c,off)] {sym} ptr idx mem) (MOV(B|W|L)storeconstidx1 [x] {sym} (ADDLconst [c] ptr) idx mem) -> (MOV(B|W|L)storeconstidx1 [ValAndOff(x).add(c)] {sym} ptr idx mem) diff --git a/src/cmd/compile/internal/ssa/gen/386Ops.go b/src/cmd/compile/internal/ssa/gen/386Ops.go index 1786eea7cf..f7e5f939ab 100644 --- a/src/cmd/compile/internal/ssa/gen/386Ops.go +++ b/src/cmd/compile/internal/ssa/gen/386Ops.go @@ -126,9 +126,10 @@ func init() { readflags = regInfo{inputs: nil, outputs: gponly} flagsgpax = regInfo{inputs: nil, clobbers: ax, outputs: []regMask{gp &^ ax}} - gpload = regInfo{inputs: []regMask{gpspsb, 0}, outputs: gponly} - gp21load = regInfo{inputs: []regMask{gp, gpspsb, 0}, outputs: gponly} - gploadidx = regInfo{inputs: []regMask{gpspsb, gpsp, 0}, outputs: gponly} + gpload = regInfo{inputs: []regMask{gpspsb, 0}, outputs: gponly} + gp21load = regInfo{inputs: []regMask{gp, gpspsb, 0}, outputs: gponly} + gploadidx = regInfo{inputs: []regMask{gpspsb, gpsp, 0}, outputs: gponly} + gp21loadidx = regInfo{inputs: []regMask{gp, gpspsb, gpsp, 0}, outputs: gponly} gpstore = regInfo{inputs: []regMask{gpspsb, gpsp, 0}} gpstoreconst = regInfo{inputs: []regMask{gpspsb, 0}} @@ -281,6 +282,7 @@ func init() { {name: "ROLWconst", argLength: 1, reg: gp11, asm: "ROLW", aux: "Int16", resultInArg0: true, clobberFlags: true}, // arg0 rotate left auxint, rotate amount 0-15 {name: "ROLBconst", argLength: 1, reg: gp11, asm: "ROLB", aux: "Int8", resultInArg0: true, clobberFlags: true}, // arg0 rotate left auxint, rotate amount 0-7 + // binary-op with a memory source operand {name: "ADDLload", argLength: 3, reg: gp21load, asm: "ADDL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 + tmp, tmp loaded from arg1+auxint+aux, arg2 = mem {name: "SUBLload", argLength: 3, reg: gp21load, asm: "SUBL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 - tmp, tmp loaded from arg1+auxint+aux, arg2 = mem {name: "MULLload", argLength: 3, reg: gp21load, asm: "IMULL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 * tmp, tmp loaded from arg1+auxint+aux, arg2 = mem @@ -288,6 +290,14 @@ func init() { {name: "ORLload", argLength: 3, reg: gp21load, asm: "ORL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 | tmp, tmp loaded from arg1+auxint+aux, arg2 = mem {name: "XORLload", argLength: 3, reg: gp21load, asm: "XORL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 ^ tmp, tmp loaded from arg1+auxint+aux, arg2 = mem + // binary-op with an indexed memory source operand + {name: "ADDLloadidx4", argLength: 4, reg: gp21loadidx, asm: "ADDL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 + tmp, tmp loaded from arg1+arg2*4+auxint+aux, arg3 = mem + {name: "SUBLloadidx4", argLength: 4, reg: gp21loadidx, asm: "SUBL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 - tmp, tmp loaded from arg1+arg2*4+auxint+aux, arg3 = mem + {name: "MULLloadidx4", argLength: 4, reg: gp21loadidx, asm: "IMULL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 * tmp, tmp loaded from arg1+arg2*4+auxint+aux, arg3 = mem + {name: "ANDLloadidx4", argLength: 4, reg: gp21loadidx, asm: "ANDL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 & tmp, tmp loaded from arg1+arg2*4+auxint+aux, arg3 = mem + {name: "ORLloadidx4", argLength: 4, reg: gp21loadidx, asm: "ORL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 | tmp, tmp loaded from arg1+arg2*4+auxint+aux, arg3 = mem + {name: "XORLloadidx4", argLength: 4, reg: gp21loadidx, asm: "XORL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 ^ tmp, tmp loaded from arg1+arg2*4+auxint+aux, arg3 = mem + // unary ops {name: "NEGL", argLength: 1, reg: gp11, asm: "NEGL", resultInArg0: true, clobberFlags: true}, // -arg0 @@ -367,12 +377,25 @@ func init() { {name: "ORLmodify", argLength: 3, reg: gpstore, asm: "ORL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+auxint+aux) |= arg1, arg2=mem {name: "XORLmodify", argLength: 3, reg: gpstore, asm: "XORL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+auxint+aux) ^= arg1, arg2=mem + // direct binary-op on indexed memory (read-modify-write) + {name: "ADDLmodifyidx4", argLength: 4, reg: gpstoreidx, asm: "ADDL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+arg1*4+auxint+aux) += arg2, arg3=mem + {name: "SUBLmodifyidx4", argLength: 4, reg: gpstoreidx, asm: "SUBL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+arg1*4+auxint+aux) -= arg2, arg3=mem + {name: "ANDLmodifyidx4", argLength: 4, reg: gpstoreidx, asm: "ANDL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+arg1*4+auxint+aux) &= arg2, arg3=mem + {name: "ORLmodifyidx4", argLength: 4, reg: gpstoreidx, asm: "ORL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+arg1*4+auxint+aux) |= arg2, arg3=mem + {name: "XORLmodifyidx4", argLength: 4, reg: gpstoreidx, asm: "XORL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+arg1*4+auxint+aux) ^= arg2, arg3=mem + // direct binary-op on memory with a constant (read-modify-write) {name: "ADDLconstmodify", argLength: 2, reg: gpstoreconst, asm: "ADDL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // add ValAndOff(AuxInt).Val() to arg0+ValAndOff(AuxInt).Off()+aux, arg1=mem {name: "ANDLconstmodify", argLength: 2, reg: gpstoreconst, asm: "ANDL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // and ValAndOff(AuxInt).Val() to arg0+ValAndOff(AuxInt).Off()+aux, arg1=mem {name: "ORLconstmodify", argLength: 2, reg: gpstoreconst, asm: "ORL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // or ValAndOff(AuxInt).Val() to arg0+ValAndOff(AuxInt).Off()+aux, arg1=mem {name: "XORLconstmodify", argLength: 2, reg: gpstoreconst, asm: "XORL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // xor ValAndOff(AuxInt).Val() to arg0+ValAndOff(AuxInt).Off()+aux, arg1=mem + // direct binary-op on indexed memory with a constant (read-modify-write) + {name: "ADDLconstmodifyidx4", argLength: 3, reg: gpstoreconstidx, asm: "ADDL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // add ValAndOff(AuxInt).Val() to arg0+arg1*4+ValAndOff(AuxInt).Off()+aux, arg2=mem + {name: "ANDLconstmodifyidx4", argLength: 3, reg: gpstoreconstidx, asm: "ANDL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // and ValAndOff(AuxInt).Val() to arg0+arg1*4+ValAndOff(AuxInt).Off()+aux, arg2=mem + {name: "ORLconstmodifyidx4", argLength: 3, reg: gpstoreconstidx, asm: "ORL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // or ValAndOff(AuxInt).Val() to arg0+arg1*4+ValAndOff(AuxInt).Off()+aux, arg2=mem + {name: "XORLconstmodifyidx4", argLength: 3, reg: gpstoreconstidx, asm: "XORL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // xor ValAndOff(AuxInt).Val() to arg0+arg1*4+ValAndOff(AuxInt).Off()+aux, arg2=mem + // indexed loads/stores {name: "MOVBloadidx1", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVBLZX", aux: "SymOff", symEffect: "Read"}, // load a byte from arg0+arg1+auxint+aux. arg2=mem {name: "MOVWloadidx1", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVWLZX", aux: "SymOff", symEffect: "Read"}, // load 2 bytes from arg0+arg1+auxint+aux. arg2=mem diff --git a/src/cmd/compile/internal/ssa/opGen.go b/src/cmd/compile/internal/ssa/opGen.go index 2145c6e723..ae04e25798 100644 --- a/src/cmd/compile/internal/ssa/opGen.go +++ b/src/cmd/compile/internal/ssa/opGen.go @@ -339,6 +339,12 @@ const ( Op386ANDLload Op386ORLload Op386XORLload + Op386ADDLloadidx4 + Op386SUBLloadidx4 + Op386MULLloadidx4 + Op386ANDLloadidx4 + Op386ORLloadidx4 + Op386XORLloadidx4 Op386NEGL Op386NOTL Op386BSFL @@ -394,10 +400,19 @@ const ( Op386ANDLmodify Op386ORLmodify Op386XORLmodify + Op386ADDLmodifyidx4 + Op386SUBLmodifyidx4 + Op386ANDLmodifyidx4 + Op386ORLmodifyidx4 + Op386XORLmodifyidx4 Op386ADDLconstmodify Op386ANDLconstmodify Op386ORLconstmodify Op386XORLconstmodify + Op386ADDLconstmodifyidx4 + Op386ANDLconstmodifyidx4 + Op386ORLconstmodifyidx4 + Op386XORLconstmodifyidx4 Op386MOVBloadidx1 Op386MOVWloadidx1 Op386MOVWloadidx2 @@ -4019,6 +4034,126 @@ var opcodeTable = [...]opInfo{ }, }, }, + { + name: "ADDLloadidx4", + auxType: auxSymOff, + argLen: 4, + resultInArg0: true, + clobberFlags: true, + faultOnNilArg1: true, + symEffect: SymRead, + asm: x86.AADDL, + reg: regInfo{ + inputs: []inputInfo{ + {0, 239}, // AX CX DX BX BP SI DI + {2, 255}, // AX CX DX BX SP BP SI DI + {1, 65791}, // AX CX DX BX SP BP SI DI SB + }, + outputs: []outputInfo{ + {0, 239}, // AX CX DX BX BP SI DI + }, + }, + }, + { + name: "SUBLloadidx4", + auxType: auxSymOff, + argLen: 4, + resultInArg0: true, + clobberFlags: true, + faultOnNilArg1: true, + symEffect: SymRead, + asm: x86.ASUBL, + reg: regInfo{ + inputs: []inputInfo{ + {0, 239}, // AX CX DX BX BP SI DI + {2, 255}, // AX CX DX BX SP BP SI DI + {1, 65791}, // AX CX DX BX SP BP SI DI SB + }, + outputs: []outputInfo{ + {0, 239}, // AX CX DX BX BP SI DI + }, + }, + }, + { + name: "MULLloadidx4", + auxType: auxSymOff, + argLen: 4, + resultInArg0: true, + clobberFlags: true, + faultOnNilArg1: true, + symEffect: SymRead, + asm: x86.AIMULL, + reg: regInfo{ + inputs: []inputInfo{ + {0, 239}, // AX CX DX BX BP SI DI + {2, 255}, // AX CX DX BX SP BP SI DI + {1, 65791}, // AX CX DX BX SP BP SI DI SB + }, + outputs: []outputInfo{ + {0, 239}, // AX CX DX BX BP SI DI + }, + }, + }, + { + name: "ANDLloadidx4", + auxType: auxSymOff, + argLen: 4, + resultInArg0: true, + clobberFlags: true, + faultOnNilArg1: true, + symEffect: SymRead, + asm: x86.AANDL, + reg: regInfo{ + inputs: []inputInfo{ + {0, 239}, // AX CX DX BX BP SI DI + {2, 255}, // AX CX DX BX SP BP SI DI + {1, 65791}, // AX CX DX BX SP BP SI DI SB + }, + outputs: []outputInfo{ + {0, 239}, // AX CX DX BX BP SI DI + }, + }, + }, + { + name: "ORLloadidx4", + auxType: auxSymOff, + argLen: 4, + resultInArg0: true, + clobberFlags: true, + faultOnNilArg1: true, + symEffect: SymRead, + asm: x86.AORL, + reg: regInfo{ + inputs: []inputInfo{ + {0, 239}, // AX CX DX BX BP SI DI + {2, 255}, // AX CX DX BX SP BP SI DI + {1, 65791}, // AX CX DX BX SP BP SI DI SB + }, + outputs: []outputInfo{ + {0, 239}, // AX CX DX BX BP SI DI + }, + }, + }, + { + name: "XORLloadidx4", + auxType: auxSymOff, + argLen: 4, + resultInArg0: true, + clobberFlags: true, + faultOnNilArg1: true, + symEffect: SymRead, + asm: x86.AXORL, + reg: regInfo{ + inputs: []inputInfo{ + {0, 239}, // AX CX DX BX BP SI DI + {2, 255}, // AX CX DX BX SP BP SI DI + {1, 65791}, // AX CX DX BX SP BP SI DI SB + }, + outputs: []outputInfo{ + {0, 239}, // AX CX DX BX BP SI DI + }, + }, + }, { name: "NEGL", argLen: 1, @@ -4743,6 +4878,86 @@ var opcodeTable = [...]opInfo{ }, }, }, + { + name: "ADDLmodifyidx4", + auxType: auxSymOff, + argLen: 4, + clobberFlags: true, + faultOnNilArg0: true, + symEffect: SymRead | SymWrite, + asm: x86.AADDL, + reg: regInfo{ + inputs: []inputInfo{ + {1, 255}, // AX CX DX BX SP BP SI DI + {2, 255}, // AX CX DX BX SP BP SI DI + {0, 65791}, // AX CX DX BX SP BP SI DI SB + }, + }, + }, + { + name: "SUBLmodifyidx4", + auxType: auxSymOff, + argLen: 4, + clobberFlags: true, + faultOnNilArg0: true, + symEffect: SymRead | SymWrite, + asm: x86.ASUBL, + reg: regInfo{ + inputs: []inputInfo{ + {1, 255}, // AX CX DX BX SP BP SI DI + {2, 255}, // AX CX DX BX SP BP SI DI + {0, 65791}, // AX CX DX BX SP BP SI DI SB + }, + }, + }, + { + name: "ANDLmodifyidx4", + auxType: auxSymOff, + argLen: 4, + clobberFlags: true, + faultOnNilArg0: true, + symEffect: SymRead | SymWrite, + asm: x86.AANDL, + reg: regInfo{ + inputs: []inputInfo{ + {1, 255}, // AX CX DX BX SP BP SI DI + {2, 255}, // AX CX DX BX SP BP SI DI + {0, 65791}, // AX CX DX BX SP BP SI DI SB + }, + }, + }, + { + name: "ORLmodifyidx4", + auxType: auxSymOff, + argLen: 4, + clobberFlags: true, + faultOnNilArg0: true, + symEffect: SymRead | SymWrite, + asm: x86.AORL, + reg: regInfo{ + inputs: []inputInfo{ + {1, 255}, // AX CX DX BX SP BP SI DI + {2, 255}, // AX CX DX BX SP BP SI DI + {0, 65791}, // AX CX DX BX SP BP SI DI SB + }, + }, + }, + { + name: "XORLmodifyidx4", + auxType: auxSymOff, + argLen: 4, + clobberFlags: true, + faultOnNilArg0: true, + symEffect: SymRead | SymWrite, + asm: x86.AXORL, + reg: regInfo{ + inputs: []inputInfo{ + {1, 255}, // AX CX DX BX SP BP SI DI + {2, 255}, // AX CX DX BX SP BP SI DI + {0, 65791}, // AX CX DX BX SP BP SI DI SB + }, + }, + }, { name: "ADDLconstmodify", auxType: auxSymValAndOff, @@ -4799,6 +5014,66 @@ var opcodeTable = [...]opInfo{ }, }, }, + { + name: "ADDLconstmodifyidx4", + auxType: auxSymValAndOff, + argLen: 3, + clobberFlags: true, + faultOnNilArg0: true, + symEffect: SymRead | SymWrite, + asm: x86.AADDL, + reg: regInfo{ + inputs: []inputInfo{ + {1, 255}, // AX CX DX BX SP BP SI DI + {0, 65791}, // AX CX DX BX SP BP SI DI SB + }, + }, + }, + { + name: "ANDLconstmodifyidx4", + auxType: auxSymValAndOff, + argLen: 3, + clobberFlags: true, + faultOnNilArg0: true, + symEffect: SymRead | SymWrite, + asm: x86.AANDL, + reg: regInfo{ + inputs: []inputInfo{ + {1, 255}, // AX CX DX BX SP BP SI DI + {0, 65791}, // AX CX DX BX SP BP SI DI SB + }, + }, + }, + { + name: "ORLconstmodifyidx4", + auxType: auxSymValAndOff, + argLen: 3, + clobberFlags: true, + faultOnNilArg0: true, + symEffect: SymRead | SymWrite, + asm: x86.AORL, + reg: regInfo{ + inputs: []inputInfo{ + {1, 255}, // AX CX DX BX SP BP SI DI + {0, 65791}, // AX CX DX BX SP BP SI DI SB + }, + }, + }, + { + name: "XORLconstmodifyidx4", + auxType: auxSymValAndOff, + argLen: 3, + clobberFlags: true, + faultOnNilArg0: true, + symEffect: SymRead | SymWrite, + asm: x86.AXORL, + reg: regInfo{ + inputs: []inputInfo{ + {1, 255}, // AX CX DX BX SP BP SI DI + {0, 65791}, // AX CX DX BX SP BP SI DI SB + }, + }, + }, { name: "MOVBloadidx1", auxType: auxSymOff, diff --git a/src/cmd/compile/internal/ssa/rewrite386.go b/src/cmd/compile/internal/ssa/rewrite386.go index 5481b4e773..3fb820933c 100644 --- a/src/cmd/compile/internal/ssa/rewrite386.go +++ b/src/cmd/compile/internal/ssa/rewrite386.go @@ -25,10 +25,16 @@ func rewriteValue386(v *Value) bool { return rewriteValue386_Op386ADDLconst_0(v) case Op386ADDLconstmodify: return rewriteValue386_Op386ADDLconstmodify_0(v) + case Op386ADDLconstmodifyidx4: + return rewriteValue386_Op386ADDLconstmodifyidx4_0(v) case Op386ADDLload: return rewriteValue386_Op386ADDLload_0(v) + case Op386ADDLloadidx4: + return rewriteValue386_Op386ADDLloadidx4_0(v) case Op386ADDLmodify: return rewriteValue386_Op386ADDLmodify_0(v) + case Op386ADDLmodifyidx4: + return rewriteValue386_Op386ADDLmodifyidx4_0(v) case Op386ADDSD: return rewriteValue386_Op386ADDSD_0(v) case Op386ADDSDload: @@ -43,10 +49,16 @@ func rewriteValue386(v *Value) bool { return rewriteValue386_Op386ANDLconst_0(v) case Op386ANDLconstmodify: return rewriteValue386_Op386ANDLconstmodify_0(v) + case Op386ANDLconstmodifyidx4: + return rewriteValue386_Op386ANDLconstmodifyidx4_0(v) case Op386ANDLload: return rewriteValue386_Op386ANDLload_0(v) + case Op386ANDLloadidx4: + return rewriteValue386_Op386ANDLloadidx4_0(v) case Op386ANDLmodify: return rewriteValue386_Op386ANDLmodify_0(v) + case Op386ANDLmodifyidx4: + return rewriteValue386_Op386ANDLmodifyidx4_0(v) case Op386CMPB: return rewriteValue386_Op386CMPB_0(v) case Op386CMPBconst: @@ -118,7 +130,7 @@ func rewriteValue386(v *Value) bool { case Op386MOVLstoreidx1: return rewriteValue386_Op386MOVLstoreidx1_0(v) case Op386MOVLstoreidx4: - return rewriteValue386_Op386MOVLstoreidx4_0(v) + return rewriteValue386_Op386MOVLstoreidx4_0(v) || rewriteValue386_Op386MOVLstoreidx4_10(v) case Op386MOVSDconst: return rewriteValue386_Op386MOVSDconst_0(v) case Op386MOVSDload: @@ -177,6 +189,8 @@ func rewriteValue386(v *Value) bool { return rewriteValue386_Op386MULLconst_0(v) || rewriteValue386_Op386MULLconst_10(v) || rewriteValue386_Op386MULLconst_20(v) || rewriteValue386_Op386MULLconst_30(v) case Op386MULLload: return rewriteValue386_Op386MULLload_0(v) + case Op386MULLloadidx4: + return rewriteValue386_Op386MULLloadidx4_0(v) case Op386MULSD: return rewriteValue386_Op386MULSD_0(v) case Op386MULSDload: @@ -195,10 +209,16 @@ func rewriteValue386(v *Value) bool { return rewriteValue386_Op386ORLconst_0(v) case Op386ORLconstmodify: return rewriteValue386_Op386ORLconstmodify_0(v) + case Op386ORLconstmodifyidx4: + return rewriteValue386_Op386ORLconstmodifyidx4_0(v) case Op386ORLload: return rewriteValue386_Op386ORLload_0(v) + case Op386ORLloadidx4: + return rewriteValue386_Op386ORLloadidx4_0(v) case Op386ORLmodify: return rewriteValue386_Op386ORLmodify_0(v) + case Op386ORLmodifyidx4: + return rewriteValue386_Op386ORLmodifyidx4_0(v) case Op386ROLBconst: return rewriteValue386_Op386ROLBconst_0(v) case Op386ROLLconst: @@ -265,8 +285,12 @@ func rewriteValue386(v *Value) bool { return rewriteValue386_Op386SUBLconst_0(v) case Op386SUBLload: return rewriteValue386_Op386SUBLload_0(v) + case Op386SUBLloadidx4: + return rewriteValue386_Op386SUBLloadidx4_0(v) case Op386SUBLmodify: return rewriteValue386_Op386SUBLmodify_0(v) + case Op386SUBLmodifyidx4: + return rewriteValue386_Op386SUBLmodifyidx4_0(v) case Op386SUBSD: return rewriteValue386_Op386SUBSD_0(v) case Op386SUBSDload: @@ -281,10 +305,16 @@ func rewriteValue386(v *Value) bool { return rewriteValue386_Op386XORLconst_0(v) case Op386XORLconstmodify: return rewriteValue386_Op386XORLconstmodify_0(v) + case Op386XORLconstmodifyidx4: + return rewriteValue386_Op386XORLconstmodifyidx4_0(v) case Op386XORLload: return rewriteValue386_Op386XORLload_0(v) + case Op386XORLloadidx4: + return rewriteValue386_Op386XORLloadidx4_0(v) case Op386XORLmodify: return rewriteValue386_Op386XORLmodify_0(v) + case Op386XORLmodifyidx4: + return rewriteValue386_Op386XORLmodifyidx4_0(v) case OpAdd16: return rewriteValue386_OpAdd16_0(v) case OpAdd32: @@ -1314,6 +1344,62 @@ func rewriteValue386_Op386ADDL_20(v *Value) bool { v.AddArg(mem) return true } + // match: (ADDL x l:(MOVLloadidx4 [off] {sym} ptr idx mem)) + // cond: canMergeLoad(v, l, x) && clobber(l) + // result: (ADDLloadidx4 x [off] {sym} ptr idx mem) + for { + _ = v.Args[1] + x := v.Args[0] + l := v.Args[1] + if l.Op != Op386MOVLloadidx4 { + break + } + off := l.AuxInt + sym := l.Aux + _ = l.Args[2] + ptr := l.Args[0] + idx := l.Args[1] + mem := l.Args[2] + if !(canMergeLoad(v, l, x) && clobber(l)) { + break + } + v.reset(Op386ADDLloadidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(x) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ADDL l:(MOVLloadidx4 [off] {sym} ptr idx mem) x) + // cond: canMergeLoad(v, l, x) && clobber(l) + // result: (ADDLloadidx4 x [off] {sym} ptr idx mem) + for { + _ = v.Args[1] + l := v.Args[0] + if l.Op != Op386MOVLloadidx4 { + break + } + off := l.AuxInt + sym := l.Aux + _ = l.Args[2] + ptr := l.Args[0] + idx := l.Args[1] + mem := l.Args[2] + x := v.Args[1] + if !(canMergeLoad(v, l, x) && clobber(l)) { + break + } + v.reset(Op386ADDLloadidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(x) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } // match: (ADDL x (NEGL y)) // cond: // result: (SUBL x y) @@ -1621,6 +1707,92 @@ func rewriteValue386_Op386ADDLconstmodify_0(v *Value) bool { } return false } +func rewriteValue386_Op386ADDLconstmodifyidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (ADDLconstmodifyidx4 [valoff1] {sym} (ADDLconst [off2] base) idx mem) + // cond: ValAndOff(valoff1).canAdd(off2) + // result: (ADDLconstmodifyidx4 [ValAndOff(valoff1).add(off2)] {sym} base idx mem) + for { + valoff1 := v.AuxInt + sym := v.Aux + _ = v.Args[2] + v_0 := v.Args[0] + if v_0.Op != Op386ADDLconst { + break + } + off2 := v_0.AuxInt + base := v_0.Args[0] + idx := v.Args[1] + mem := v.Args[2] + if !(ValAndOff(valoff1).canAdd(off2)) { + break + } + v.reset(Op386ADDLconstmodifyidx4) + v.AuxInt = ValAndOff(valoff1).add(off2) + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ADDLconstmodifyidx4 [valoff1] {sym} base (ADDLconst [off2] idx) mem) + // cond: ValAndOff(valoff1).canAdd(off2*4) + // result: (ADDLconstmodifyidx4 [ValAndOff(valoff1).add(off2*4)] {sym} base idx mem) + for { + valoff1 := v.AuxInt + sym := v.Aux + _ = v.Args[2] + base := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + idx := v_1.Args[0] + mem := v.Args[2] + if !(ValAndOff(valoff1).canAdd(off2 * 4)) { + break + } + v.reset(Op386ADDLconstmodifyidx4) + v.AuxInt = ValAndOff(valoff1).add(off2 * 4) + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ADDLconstmodifyidx4 [valoff1] {sym1} (LEAL [off2] {sym2} base) idx mem) + // cond: ValAndOff(valoff1).canAdd(off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (ADDLconstmodifyidx4 [ValAndOff(valoff1).add(off2)] {mergeSym(sym1,sym2)} base idx mem) + for { + valoff1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[2] + v_0 := v.Args[0] + if v_0.Op != Op386LEAL { + break + } + off2 := v_0.AuxInt + sym2 := v_0.Aux + base := v_0.Args[0] + idx := v.Args[1] + mem := v.Args[2] + if !(ValAndOff(valoff1).canAdd(off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386ADDLconstmodifyidx4) + v.AuxInt = ValAndOff(valoff1).add(off2) + v.Aux = mergeSym(sym1, sym2) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} func rewriteValue386_Op386ADDLload_0(v *Value) bool { b := v.Block _ = b @@ -1679,6 +1851,128 @@ func rewriteValue386_Op386ADDLload_0(v *Value) bool { v.AddArg(mem) return true } + // match: (ADDLload [off1] {sym1} val (LEAL4 [off2] {sym2} ptr idx) mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) + // result: (ADDLloadidx4 [off1+off2] {mergeSym(sym1,sym2)} val ptr idx mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[2] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386LEAL4 { + break + } + off2 := v_1.AuxInt + sym2 := v_1.Aux + _ = v_1.Args[1] + ptr := v_1.Args[0] + idx := v_1.Args[1] + mem := v.Args[2] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2)) { + break + } + v.reset(Op386ADDLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(val) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} +func rewriteValue386_Op386ADDLloadidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (ADDLloadidx4 [off1] {sym} val (ADDLconst [off2] base) idx mem) + // cond: is32Bit(off1+off2) + // result: (ADDLloadidx4 [off1+off2] {sym} val base idx mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + base := v_1.Args[0] + idx := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2)) { + break + } + v.reset(Op386ADDLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = sym + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ADDLloadidx4 [off1] {sym} val base (ADDLconst [off2] idx) mem) + // cond: is32Bit(off1+off2*4) + // result: (ADDLloadidx4 [off1+off2*4] {sym} val base idx mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + val := v.Args[0] + base := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386ADDLconst { + break + } + off2 := v_2.AuxInt + idx := v_2.Args[0] + mem := v.Args[3] + if !(is32Bit(off1 + off2*4)) { + break + } + v.reset(Op386ADDLloadidx4) + v.AuxInt = off1 + off2*4 + v.Aux = sym + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ADDLloadidx4 [off1] {sym1} val (LEAL [off2] {sym2} base) idx mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (ADDLloadidx4 [off1+off2] {mergeSym(sym1,sym2)} val base idx mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[3] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386LEAL { + break + } + off2 := v_1.AuxInt + sym2 := v_1.Aux + base := v_1.Args[0] + idx := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386ADDLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } return false } func rewriteValue386_Op386ADDLmodify_0(v *Value) bool { @@ -1741,6 +2035,124 @@ func rewriteValue386_Op386ADDLmodify_0(v *Value) bool { } return false } +func rewriteValue386_Op386ADDLmodifyidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (ADDLmodifyidx4 [off1] {sym} (ADDLconst [off2] base) idx val mem) + // cond: is32Bit(off1+off2) + // result: (ADDLmodifyidx4 [off1+off2] {sym} base idx val mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + v_0 := v.Args[0] + if v_0.Op != Op386ADDLconst { + break + } + off2 := v_0.AuxInt + base := v_0.Args[0] + idx := v.Args[1] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2)) { + break + } + v.reset(Op386ADDLmodifyidx4) + v.AuxInt = off1 + off2 + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (ADDLmodifyidx4 [off1] {sym} base (ADDLconst [off2] idx) val mem) + // cond: is32Bit(off1+off2*4) + // result: (ADDLmodifyidx4 [off1+off2*4] {sym} base idx val mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + base := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + idx := v_1.Args[0] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2*4)) { + break + } + v.reset(Op386ADDLmodifyidx4) + v.AuxInt = off1 + off2*4 + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (ADDLmodifyidx4 [off1] {sym1} (LEAL [off2] {sym2} base) idx val mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (ADDLmodifyidx4 [off1+off2] {mergeSym(sym1,sym2)} base idx val mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[3] + v_0 := v.Args[0] + if v_0.Op != Op386LEAL { + break + } + off2 := v_0.AuxInt + sym2 := v_0.Aux + base := v_0.Args[0] + idx := v.Args[1] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386ADDLmodifyidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (ADDLmodifyidx4 [off] {sym} ptr idx (MOVLconst [c]) mem) + // cond: validValAndOff(c,off) + // result: (ADDLconstmodifyidx4 [makeValAndOff(c,off)] {sym} ptr idx mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386MOVLconst { + break + } + c := v_2.AuxInt + mem := v.Args[3] + if !(validValAndOff(c, off)) { + break + } + v.reset(Op386ADDLconstmodifyidx4) + v.AuxInt = makeValAndOff(c, off) + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} func rewriteValue386_Op386ADDSD_0(v *Value) bool { b := v.Block _ = b @@ -2064,6 +2476,62 @@ func rewriteValue386_Op386ANDL_0(v *Value) bool { v.AddArg(mem) return true } + // match: (ANDL x l:(MOVLloadidx4 [off] {sym} ptr idx mem)) + // cond: canMergeLoad(v, l, x) && clobber(l) + // result: (ANDLloadidx4 x [off] {sym} ptr idx mem) + for { + _ = v.Args[1] + x := v.Args[0] + l := v.Args[1] + if l.Op != Op386MOVLloadidx4 { + break + } + off := l.AuxInt + sym := l.Aux + _ = l.Args[2] + ptr := l.Args[0] + idx := l.Args[1] + mem := l.Args[2] + if !(canMergeLoad(v, l, x) && clobber(l)) { + break + } + v.reset(Op386ANDLloadidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(x) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ANDL l:(MOVLloadidx4 [off] {sym} ptr idx mem) x) + // cond: canMergeLoad(v, l, x) && clobber(l) + // result: (ANDLloadidx4 x [off] {sym} ptr idx mem) + for { + _ = v.Args[1] + l := v.Args[0] + if l.Op != Op386MOVLloadidx4 { + break + } + off := l.AuxInt + sym := l.Aux + _ = l.Args[2] + ptr := l.Args[0] + idx := l.Args[1] + mem := l.Args[2] + x := v.Args[1] + if !(canMergeLoad(v, l, x) && clobber(l)) { + break + } + v.reset(Op386ANDLloadidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(x) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } // match: (ANDL x x) // cond: // result: x @@ -2195,6 +2663,92 @@ func rewriteValue386_Op386ANDLconstmodify_0(v *Value) bool { } return false } +func rewriteValue386_Op386ANDLconstmodifyidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (ANDLconstmodifyidx4 [valoff1] {sym} (ADDLconst [off2] base) idx mem) + // cond: ValAndOff(valoff1).canAdd(off2) + // result: (ANDLconstmodifyidx4 [ValAndOff(valoff1).add(off2)] {sym} base idx mem) + for { + valoff1 := v.AuxInt + sym := v.Aux + _ = v.Args[2] + v_0 := v.Args[0] + if v_0.Op != Op386ADDLconst { + break + } + off2 := v_0.AuxInt + base := v_0.Args[0] + idx := v.Args[1] + mem := v.Args[2] + if !(ValAndOff(valoff1).canAdd(off2)) { + break + } + v.reset(Op386ANDLconstmodifyidx4) + v.AuxInt = ValAndOff(valoff1).add(off2) + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ANDLconstmodifyidx4 [valoff1] {sym} base (ADDLconst [off2] idx) mem) + // cond: ValAndOff(valoff1).canAdd(off2*4) + // result: (ANDLconstmodifyidx4 [ValAndOff(valoff1).add(off2*4)] {sym} base idx mem) + for { + valoff1 := v.AuxInt + sym := v.Aux + _ = v.Args[2] + base := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + idx := v_1.Args[0] + mem := v.Args[2] + if !(ValAndOff(valoff1).canAdd(off2 * 4)) { + break + } + v.reset(Op386ANDLconstmodifyidx4) + v.AuxInt = ValAndOff(valoff1).add(off2 * 4) + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ANDLconstmodifyidx4 [valoff1] {sym1} (LEAL [off2] {sym2} base) idx mem) + // cond: ValAndOff(valoff1).canAdd(off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (ANDLconstmodifyidx4 [ValAndOff(valoff1).add(off2)] {mergeSym(sym1,sym2)} base idx mem) + for { + valoff1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[2] + v_0 := v.Args[0] + if v_0.Op != Op386LEAL { + break + } + off2 := v_0.AuxInt + sym2 := v_0.Aux + base := v_0.Args[0] + idx := v.Args[1] + mem := v.Args[2] + if !(ValAndOff(valoff1).canAdd(off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386ANDLconstmodifyidx4) + v.AuxInt = ValAndOff(valoff1).add(off2) + v.Aux = mergeSym(sym1, sym2) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} func rewriteValue386_Op386ANDLload_0(v *Value) bool { b := v.Block _ = b @@ -2253,6 +2807,128 @@ func rewriteValue386_Op386ANDLload_0(v *Value) bool { v.AddArg(mem) return true } + // match: (ANDLload [off1] {sym1} val (LEAL4 [off2] {sym2} ptr idx) mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) + // result: (ANDLloadidx4 [off1+off2] {mergeSym(sym1,sym2)} val ptr idx mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[2] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386LEAL4 { + break + } + off2 := v_1.AuxInt + sym2 := v_1.Aux + _ = v_1.Args[1] + ptr := v_1.Args[0] + idx := v_1.Args[1] + mem := v.Args[2] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2)) { + break + } + v.reset(Op386ANDLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(val) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} +func rewriteValue386_Op386ANDLloadidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (ANDLloadidx4 [off1] {sym} val (ADDLconst [off2] base) idx mem) + // cond: is32Bit(off1+off2) + // result: (ANDLloadidx4 [off1+off2] {sym} val base idx mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + base := v_1.Args[0] + idx := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2)) { + break + } + v.reset(Op386ANDLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = sym + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ANDLloadidx4 [off1] {sym} val base (ADDLconst [off2] idx) mem) + // cond: is32Bit(off1+off2*4) + // result: (ANDLloadidx4 [off1+off2*4] {sym} val base idx mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + val := v.Args[0] + base := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386ADDLconst { + break + } + off2 := v_2.AuxInt + idx := v_2.Args[0] + mem := v.Args[3] + if !(is32Bit(off1 + off2*4)) { + break + } + v.reset(Op386ANDLloadidx4) + v.AuxInt = off1 + off2*4 + v.Aux = sym + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ANDLloadidx4 [off1] {sym1} val (LEAL [off2] {sym2} base) idx mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (ANDLloadidx4 [off1+off2] {mergeSym(sym1,sym2)} val base idx mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[3] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386LEAL { + break + } + off2 := v_1.AuxInt + sym2 := v_1.Aux + base := v_1.Args[0] + idx := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386ANDLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } return false } func rewriteValue386_Op386ANDLmodify_0(v *Value) bool { @@ -2315,6 +2991,124 @@ func rewriteValue386_Op386ANDLmodify_0(v *Value) bool { } return false } +func rewriteValue386_Op386ANDLmodifyidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (ANDLmodifyidx4 [off1] {sym} (ADDLconst [off2] base) idx val mem) + // cond: is32Bit(off1+off2) + // result: (ANDLmodifyidx4 [off1+off2] {sym} base idx val mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + v_0 := v.Args[0] + if v_0.Op != Op386ADDLconst { + break + } + off2 := v_0.AuxInt + base := v_0.Args[0] + idx := v.Args[1] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2)) { + break + } + v.reset(Op386ANDLmodifyidx4) + v.AuxInt = off1 + off2 + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (ANDLmodifyidx4 [off1] {sym} base (ADDLconst [off2] idx) val mem) + // cond: is32Bit(off1+off2*4) + // result: (ANDLmodifyidx4 [off1+off2*4] {sym} base idx val mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + base := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + idx := v_1.Args[0] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2*4)) { + break + } + v.reset(Op386ANDLmodifyidx4) + v.AuxInt = off1 + off2*4 + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (ANDLmodifyidx4 [off1] {sym1} (LEAL [off2] {sym2} base) idx val mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (ANDLmodifyidx4 [off1+off2] {mergeSym(sym1,sym2)} base idx val mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[3] + v_0 := v.Args[0] + if v_0.Op != Op386LEAL { + break + } + off2 := v_0.AuxInt + sym2 := v_0.Aux + base := v_0.Args[0] + idx := v.Args[1] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386ANDLmodifyidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (ANDLmodifyidx4 [off] {sym} ptr idx (MOVLconst [c]) mem) + // cond: validValAndOff(c,off) + // result: (ANDLconstmodifyidx4 [makeValAndOff(c,off)] {sym} ptr idx mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386MOVLconst { + break + } + c := v_2.AuxInt + mem := v.Args[3] + if !(validValAndOff(c, off)) { + break + } + v.reset(Op386ANDLconstmodifyidx4) + v.AuxInt = makeValAndOff(c, off) + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} func rewriteValue386_Op386CMPB_0(v *Value) bool { b := v.Block _ = b @@ -7279,6 +8073,797 @@ func rewriteValue386_Op386MOVLstoreidx4_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(ADDLloadidx4 x [off] {sym} ptr idx mem) mem) + // cond: y.Uses==1 && clobber(y) + // result: (ADDLmodifyidx4 [off] {sym} ptr idx x mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386ADDLloadidx4 { + break + } + if y.AuxInt != off { + break + } + if y.Aux != sym { + break + } + _ = y.Args[3] + x := y.Args[0] + if ptr != y.Args[1] { + break + } + if idx != y.Args[2] { + break + } + mem := y.Args[3] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && clobber(y)) { + break + } + v.reset(Op386ADDLmodifyidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(x) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(ANDLloadidx4 x [off] {sym} ptr idx mem) mem) + // cond: y.Uses==1 && clobber(y) + // result: (ANDLmodifyidx4 [off] {sym} ptr idx x mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386ANDLloadidx4 { + break + } + if y.AuxInt != off { + break + } + if y.Aux != sym { + break + } + _ = y.Args[3] + x := y.Args[0] + if ptr != y.Args[1] { + break + } + if idx != y.Args[2] { + break + } + mem := y.Args[3] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && clobber(y)) { + break + } + v.reset(Op386ANDLmodifyidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(x) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(ORLloadidx4 x [off] {sym} ptr idx mem) mem) + // cond: y.Uses==1 && clobber(y) + // result: (ORLmodifyidx4 [off] {sym} ptr idx x mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386ORLloadidx4 { + break + } + if y.AuxInt != off { + break + } + if y.Aux != sym { + break + } + _ = y.Args[3] + x := y.Args[0] + if ptr != y.Args[1] { + break + } + if idx != y.Args[2] { + break + } + mem := y.Args[3] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && clobber(y)) { + break + } + v.reset(Op386ORLmodifyidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(x) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(XORLloadidx4 x [off] {sym} ptr idx mem) mem) + // cond: y.Uses==1 && clobber(y) + // result: (XORLmodifyidx4 [off] {sym} ptr idx x mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386XORLloadidx4 { + break + } + if y.AuxInt != off { + break + } + if y.Aux != sym { + break + } + _ = y.Args[3] + x := y.Args[0] + if ptr != y.Args[1] { + break + } + if idx != y.Args[2] { + break + } + mem := y.Args[3] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && clobber(y)) { + break + } + v.reset(Op386XORLmodifyidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(x) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(ADDL l:(MOVLloadidx4 [off] {sym} ptr idx mem) x) mem) + // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) + // result: (ADDLmodifyidx4 [off] {sym} ptr idx x mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386ADDL { + break + } + _ = y.Args[1] + l := y.Args[0] + if l.Op != Op386MOVLloadidx4 { + break + } + if l.AuxInt != off { + break + } + if l.Aux != sym { + break + } + _ = l.Args[2] + if ptr != l.Args[0] { + break + } + if idx != l.Args[1] { + break + } + mem := l.Args[2] + x := y.Args[1] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && l.Uses == 1 && clobber(y) && clobber(l)) { + break + } + v.reset(Op386ADDLmodifyidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(x) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(ADDL x l:(MOVLloadidx4 [off] {sym} ptr idx mem)) mem) + // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) + // result: (ADDLmodifyidx4 [off] {sym} ptr idx x mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386ADDL { + break + } + _ = y.Args[1] + x := y.Args[0] + l := y.Args[1] + if l.Op != Op386MOVLloadidx4 { + break + } + if l.AuxInt != off { + break + } + if l.Aux != sym { + break + } + _ = l.Args[2] + if ptr != l.Args[0] { + break + } + if idx != l.Args[1] { + break + } + mem := l.Args[2] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && l.Uses == 1 && clobber(y) && clobber(l)) { + break + } + v.reset(Op386ADDLmodifyidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(x) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(SUBL l:(MOVLloadidx4 [off] {sym} ptr idx mem) x) mem) + // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) + // result: (SUBLmodifyidx4 [off] {sym} ptr idx x mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386SUBL { + break + } + _ = y.Args[1] + l := y.Args[0] + if l.Op != Op386MOVLloadidx4 { + break + } + if l.AuxInt != off { + break + } + if l.Aux != sym { + break + } + _ = l.Args[2] + if ptr != l.Args[0] { + break + } + if idx != l.Args[1] { + break + } + mem := l.Args[2] + x := y.Args[1] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && l.Uses == 1 && clobber(y) && clobber(l)) { + break + } + v.reset(Op386SUBLmodifyidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(x) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(ANDL l:(MOVLloadidx4 [off] {sym} ptr idx mem) x) mem) + // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) + // result: (ANDLmodifyidx4 [off] {sym} ptr idx x mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386ANDL { + break + } + _ = y.Args[1] + l := y.Args[0] + if l.Op != Op386MOVLloadidx4 { + break + } + if l.AuxInt != off { + break + } + if l.Aux != sym { + break + } + _ = l.Args[2] + if ptr != l.Args[0] { + break + } + if idx != l.Args[1] { + break + } + mem := l.Args[2] + x := y.Args[1] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && l.Uses == 1 && clobber(y) && clobber(l)) { + break + } + v.reset(Op386ANDLmodifyidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(x) + v.AddArg(mem) + return true + } + return false +} +func rewriteValue386_Op386MOVLstoreidx4_10(v *Value) bool { + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(ANDL x l:(MOVLloadidx4 [off] {sym} ptr idx mem)) mem) + // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) + // result: (ANDLmodifyidx4 [off] {sym} ptr idx x mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386ANDL { + break + } + _ = y.Args[1] + x := y.Args[0] + l := y.Args[1] + if l.Op != Op386MOVLloadidx4 { + break + } + if l.AuxInt != off { + break + } + if l.Aux != sym { + break + } + _ = l.Args[2] + if ptr != l.Args[0] { + break + } + if idx != l.Args[1] { + break + } + mem := l.Args[2] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && l.Uses == 1 && clobber(y) && clobber(l)) { + break + } + v.reset(Op386ANDLmodifyidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(x) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(ORL l:(MOVLloadidx4 [off] {sym} ptr idx mem) x) mem) + // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) + // result: (ORLmodifyidx4 [off] {sym} ptr idx x mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386ORL { + break + } + _ = y.Args[1] + l := y.Args[0] + if l.Op != Op386MOVLloadidx4 { + break + } + if l.AuxInt != off { + break + } + if l.Aux != sym { + break + } + _ = l.Args[2] + if ptr != l.Args[0] { + break + } + if idx != l.Args[1] { + break + } + mem := l.Args[2] + x := y.Args[1] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && l.Uses == 1 && clobber(y) && clobber(l)) { + break + } + v.reset(Op386ORLmodifyidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(x) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(ORL x l:(MOVLloadidx4 [off] {sym} ptr idx mem)) mem) + // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) + // result: (ORLmodifyidx4 [off] {sym} ptr idx x mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386ORL { + break + } + _ = y.Args[1] + x := y.Args[0] + l := y.Args[1] + if l.Op != Op386MOVLloadidx4 { + break + } + if l.AuxInt != off { + break + } + if l.Aux != sym { + break + } + _ = l.Args[2] + if ptr != l.Args[0] { + break + } + if idx != l.Args[1] { + break + } + mem := l.Args[2] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && l.Uses == 1 && clobber(y) && clobber(l)) { + break + } + v.reset(Op386ORLmodifyidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(x) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(XORL l:(MOVLloadidx4 [off] {sym} ptr idx mem) x) mem) + // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) + // result: (XORLmodifyidx4 [off] {sym} ptr idx x mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386XORL { + break + } + _ = y.Args[1] + l := y.Args[0] + if l.Op != Op386MOVLloadidx4 { + break + } + if l.AuxInt != off { + break + } + if l.Aux != sym { + break + } + _ = l.Args[2] + if ptr != l.Args[0] { + break + } + if idx != l.Args[1] { + break + } + mem := l.Args[2] + x := y.Args[1] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && l.Uses == 1 && clobber(y) && clobber(l)) { + break + } + v.reset(Op386XORLmodifyidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(x) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(XORL x l:(MOVLloadidx4 [off] {sym} ptr idx mem)) mem) + // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) + // result: (XORLmodifyidx4 [off] {sym} ptr idx x mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386XORL { + break + } + _ = y.Args[1] + x := y.Args[0] + l := y.Args[1] + if l.Op != Op386MOVLloadidx4 { + break + } + if l.AuxInt != off { + break + } + if l.Aux != sym { + break + } + _ = l.Args[2] + if ptr != l.Args[0] { + break + } + if idx != l.Args[1] { + break + } + mem := l.Args[2] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && l.Uses == 1 && clobber(y) && clobber(l)) { + break + } + v.reset(Op386XORLmodifyidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(x) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(ADDLconst [c] l:(MOVLloadidx4 [off] {sym} ptr idx mem)) mem) + // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) && validValAndOff(c,off) + // result: (ADDLconstmodifyidx4 [makeValAndOff(c,off)] {sym} ptr idx mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386ADDLconst { + break + } + c := y.AuxInt + l := y.Args[0] + if l.Op != Op386MOVLloadidx4 { + break + } + if l.AuxInt != off { + break + } + if l.Aux != sym { + break + } + _ = l.Args[2] + if ptr != l.Args[0] { + break + } + if idx != l.Args[1] { + break + } + mem := l.Args[2] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && l.Uses == 1 && clobber(y) && clobber(l) && validValAndOff(c, off)) { + break + } + v.reset(Op386ADDLconstmodifyidx4) + v.AuxInt = makeValAndOff(c, off) + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(ANDLconst [c] l:(MOVLloadidx4 [off] {sym} ptr idx mem)) mem) + // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) && validValAndOff(c,off) + // result: (ANDLconstmodifyidx4 [makeValAndOff(c,off)] {sym} ptr idx mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386ANDLconst { + break + } + c := y.AuxInt + l := y.Args[0] + if l.Op != Op386MOVLloadidx4 { + break + } + if l.AuxInt != off { + break + } + if l.Aux != sym { + break + } + _ = l.Args[2] + if ptr != l.Args[0] { + break + } + if idx != l.Args[1] { + break + } + mem := l.Args[2] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && l.Uses == 1 && clobber(y) && clobber(l) && validValAndOff(c, off)) { + break + } + v.reset(Op386ANDLconstmodifyidx4) + v.AuxInt = makeValAndOff(c, off) + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(ORLconst [c] l:(MOVLloadidx4 [off] {sym} ptr idx mem)) mem) + // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) && validValAndOff(c,off) + // result: (ORLconstmodifyidx4 [makeValAndOff(c,off)] {sym} ptr idx mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386ORLconst { + break + } + c := y.AuxInt + l := y.Args[0] + if l.Op != Op386MOVLloadidx4 { + break + } + if l.AuxInt != off { + break + } + if l.Aux != sym { + break + } + _ = l.Args[2] + if ptr != l.Args[0] { + break + } + if idx != l.Args[1] { + break + } + mem := l.Args[2] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && l.Uses == 1 && clobber(y) && clobber(l) && validValAndOff(c, off)) { + break + } + v.reset(Op386ORLconstmodifyidx4) + v.AuxInt = makeValAndOff(c, off) + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (MOVLstoreidx4 {sym} [off] ptr idx y:(XORLconst [c] l:(MOVLloadidx4 [off] {sym} ptr idx mem)) mem) + // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) && validValAndOff(c,off) + // result: (XORLconstmodifyidx4 [makeValAndOff(c,off)] {sym} ptr idx mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + y := v.Args[2] + if y.Op != Op386XORLconst { + break + } + c := y.AuxInt + l := y.Args[0] + if l.Op != Op386MOVLloadidx4 { + break + } + if l.AuxInt != off { + break + } + if l.Aux != sym { + break + } + _ = l.Args[2] + if ptr != l.Args[0] { + break + } + if idx != l.Args[1] { + break + } + mem := l.Args[2] + if mem != v.Args[3] { + break + } + if !(y.Uses == 1 && l.Uses == 1 && clobber(y) && clobber(l) && validValAndOff(c, off)) { + break + } + v.reset(Op386XORLconstmodifyidx4) + v.AuxInt = makeValAndOff(c, off) + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } return false } func rewriteValue386_Op386MOVSDconst_0(v *Value) bool { @@ -10378,6 +11963,62 @@ func rewriteValue386_Op386MULL_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MULL x l:(MOVLloadidx4 [off] {sym} ptr idx mem)) + // cond: canMergeLoad(v, l, x) && clobber(l) + // result: (MULLloadidx4 x [off] {sym} ptr idx mem) + for { + _ = v.Args[1] + x := v.Args[0] + l := v.Args[1] + if l.Op != Op386MOVLloadidx4 { + break + } + off := l.AuxInt + sym := l.Aux + _ = l.Args[2] + ptr := l.Args[0] + idx := l.Args[1] + mem := l.Args[2] + if !(canMergeLoad(v, l, x) && clobber(l)) { + break + } + v.reset(Op386MULLloadidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(x) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (MULL l:(MOVLloadidx4 [off] {sym} ptr idx mem) x) + // cond: canMergeLoad(v, l, x) && clobber(l) + // result: (MULLloadidx4 x [off] {sym} ptr idx mem) + for { + _ = v.Args[1] + l := v.Args[0] + if l.Op != Op386MOVLloadidx4 { + break + } + off := l.AuxInt + sym := l.Aux + _ = l.Args[2] + ptr := l.Args[0] + idx := l.Args[1] + mem := l.Args[2] + x := v.Args[1] + if !(canMergeLoad(v, l, x) && clobber(l)) { + break + } + v.reset(Op386MULLloadidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(x) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } return false } func rewriteValue386_Op386MULLconst_0(v *Value) bool { @@ -10943,6 +12584,128 @@ func rewriteValue386_Op386MULLload_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MULLload [off1] {sym1} val (LEAL4 [off2] {sym2} ptr idx) mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) + // result: (MULLloadidx4 [off1+off2] {mergeSym(sym1,sym2)} val ptr idx mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[2] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386LEAL4 { + break + } + off2 := v_1.AuxInt + sym2 := v_1.Aux + _ = v_1.Args[1] + ptr := v_1.Args[0] + idx := v_1.Args[1] + mem := v.Args[2] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2)) { + break + } + v.reset(Op386MULLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(val) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} +func rewriteValue386_Op386MULLloadidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (MULLloadidx4 [off1] {sym} val (ADDLconst [off2] base) idx mem) + // cond: is32Bit(off1+off2) + // result: (MULLloadidx4 [off1+off2] {sym} val base idx mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + base := v_1.Args[0] + idx := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2)) { + break + } + v.reset(Op386MULLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = sym + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (MULLloadidx4 [off1] {sym} val base (ADDLconst [off2] idx) mem) + // cond: is32Bit(off1+off2*4) + // result: (MULLloadidx4 [off1+off2*4] {sym} val base idx mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + val := v.Args[0] + base := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386ADDLconst { + break + } + off2 := v_2.AuxInt + idx := v_2.Args[0] + mem := v.Args[3] + if !(is32Bit(off1 + off2*4)) { + break + } + v.reset(Op386MULLloadidx4) + v.AuxInt = off1 + off2*4 + v.Aux = sym + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (MULLloadidx4 [off1] {sym1} val (LEAL [off2] {sym2} base) idx mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (MULLloadidx4 [off1+off2] {mergeSym(sym1,sym2)} val base idx mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[3] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386LEAL { + break + } + off2 := v_1.AuxInt + sym2 := v_1.Aux + base := v_1.Args[0] + idx := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386MULLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } return false } func rewriteValue386_Op386MULSD_0(v *Value) bool { @@ -11473,6 +13236,62 @@ func rewriteValue386_Op386ORL_10(v *Value) bool { _ = b typ := &b.Func.Config.Types _ = typ + // match: (ORL x l:(MOVLloadidx4 [off] {sym} ptr idx mem)) + // cond: canMergeLoad(v, l, x) && clobber(l) + // result: (ORLloadidx4 x [off] {sym} ptr idx mem) + for { + _ = v.Args[1] + x := v.Args[0] + l := v.Args[1] + if l.Op != Op386MOVLloadidx4 { + break + } + off := l.AuxInt + sym := l.Aux + _ = l.Args[2] + ptr := l.Args[0] + idx := l.Args[1] + mem := l.Args[2] + if !(canMergeLoad(v, l, x) && clobber(l)) { + break + } + v.reset(Op386ORLloadidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(x) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ORL l:(MOVLloadidx4 [off] {sym} ptr idx mem) x) + // cond: canMergeLoad(v, l, x) && clobber(l) + // result: (ORLloadidx4 x [off] {sym} ptr idx mem) + for { + _ = v.Args[1] + l := v.Args[0] + if l.Op != Op386MOVLloadidx4 { + break + } + off := l.AuxInt + sym := l.Aux + _ = l.Args[2] + ptr := l.Args[0] + idx := l.Args[1] + mem := l.Args[2] + x := v.Args[1] + if !(canMergeLoad(v, l, x) && clobber(l)) { + break + } + v.reset(Op386ORLloadidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(x) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } // match: (ORL x x) // cond: // result: x @@ -11943,6 +13762,11 @@ func rewriteValue386_Op386ORL_10(v *Value) bool { v0.AddArg(mem) return true } + return false +} +func rewriteValue386_Op386ORL_20(v *Value) bool { + b := v.Block + _ = b // match: (ORL x0:(MOVBloadidx1 [i0] {s} idx p mem) s0:(SHLLconst [8] x1:(MOVBloadidx1 [i1] {s} p idx mem))) // cond: i1==i0+1 && x0.Uses == 1 && x1.Uses == 1 && s0.Uses == 1 && mergePoint(b,x0,x1) != nil && clobber(x0) && clobber(x1) && clobber(s0) // result: @mergePoint(b,x0,x1) (MOVWloadidx1 [i0] {s} p idx mem) @@ -12051,11 +13875,6 @@ func rewriteValue386_Op386ORL_10(v *Value) bool { v0.AddArg(mem) return true } - return false -} -func rewriteValue386_Op386ORL_20(v *Value) bool { - b := v.Block - _ = b // match: (ORL x0:(MOVBloadidx1 [i0] {s} idx p mem) s0:(SHLLconst [8] x1:(MOVBloadidx1 [i1] {s} idx p mem))) // cond: i1==i0+1 && x0.Uses == 1 && x1.Uses == 1 && s0.Uses == 1 && mergePoint(b,x0,x1) != nil && clobber(x0) && clobber(x1) && clobber(s0) // result: @mergePoint(b,x0,x1) (MOVWloadidx1 [i0] {s} p idx mem) @@ -12578,6 +14397,11 @@ func rewriteValue386_Op386ORL_20(v *Value) bool { v0.AddArg(mem) return true } + return false +} +func rewriteValue386_Op386ORL_30(v *Value) bool { + b := v.Block + _ = b // match: (ORL o0:(ORL x0:(MOVWloadidx1 [i0] {s} idx p mem) s0:(SHLLconst [16] x1:(MOVBloadidx1 [i2] {s} idx p mem))) s1:(SHLLconst [24] x2:(MOVBloadidx1 [i3] {s} p idx mem))) // cond: i2 == i0+2 && i3 == i0+3 && x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && s0.Uses == 1 && s1.Uses == 1 && o0.Uses == 1 && mergePoint(b,x0,x1,x2) != nil && clobber(x0) && clobber(x1) && clobber(x2) && clobber(s0) && clobber(s1) && clobber(o0) // result: @mergePoint(b,x0,x1,x2) (MOVLloadidx1 [i0] {s} p idx mem) @@ -12746,11 +14570,6 @@ func rewriteValue386_Op386ORL_20(v *Value) bool { v0.AddArg(mem) return true } - return false -} -func rewriteValue386_Op386ORL_30(v *Value) bool { - b := v.Block - _ = b // match: (ORL o0:(ORL s0:(SHLLconst [16] x1:(MOVBloadidx1 [i2] {s} idx p mem)) x0:(MOVWloadidx1 [i0] {s} p idx mem)) s1:(SHLLconst [24] x2:(MOVBloadidx1 [i3] {s} p idx mem))) // cond: i2 == i0+2 && i3 == i0+3 && x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && s0.Uses == 1 && s1.Uses == 1 && o0.Uses == 1 && mergePoint(b,x0,x1,x2) != nil && clobber(x0) && clobber(x1) && clobber(x2) && clobber(s0) && clobber(s1) && clobber(o0) // result: @mergePoint(b,x0,x1,x2) (MOVLloadidx1 [i0] {s} p idx mem) @@ -13423,6 +15242,11 @@ func rewriteValue386_Op386ORL_30(v *Value) bool { v0.AddArg(mem) return true } + return false +} +func rewriteValue386_Op386ORL_40(v *Value) bool { + b := v.Block + _ = b // match: (ORL o0:(ORL s0:(SHLLconst [16] x1:(MOVBloadidx1 [i2] {s} idx p mem)) x0:(MOVWloadidx1 [i0] {s} p idx mem)) s1:(SHLLconst [24] x2:(MOVBloadidx1 [i3] {s} idx p mem))) // cond: i2 == i0+2 && i3 == i0+3 && x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && s0.Uses == 1 && s1.Uses == 1 && o0.Uses == 1 && mergePoint(b,x0,x1,x2) != nil && clobber(x0) && clobber(x1) && clobber(x2) && clobber(s0) && clobber(s1) && clobber(o0) // result: @mergePoint(b,x0,x1,x2) (MOVLloadidx1 [i0] {s} p idx mem) @@ -13591,11 +15415,6 @@ func rewriteValue386_Op386ORL_30(v *Value) bool { v0.AddArg(mem) return true } - return false -} -func rewriteValue386_Op386ORL_40(v *Value) bool { - b := v.Block - _ = b // match: (ORL o0:(ORL s0:(SHLLconst [16] x1:(MOVBloadidx1 [i2] {s} idx p mem)) x0:(MOVWloadidx1 [i0] {s} idx p mem)) s1:(SHLLconst [24] x2:(MOVBloadidx1 [i3] {s} idx p mem))) // cond: i2 == i0+2 && i3 == i0+3 && x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && s0.Uses == 1 && s1.Uses == 1 && o0.Uses == 1 && mergePoint(b,x0,x1,x2) != nil && clobber(x0) && clobber(x1) && clobber(x2) && clobber(s0) && clobber(s1) && clobber(o0) // result: @mergePoint(b,x0,x1,x2) (MOVLloadidx1 [i0] {s} p idx mem) @@ -14268,6 +16087,11 @@ func rewriteValue386_Op386ORL_40(v *Value) bool { v0.AddArg(mem) return true } + return false +} +func rewriteValue386_Op386ORL_50(v *Value) bool { + b := v.Block + _ = b // match: (ORL s1:(SHLLconst [24] x2:(MOVBloadidx1 [i3] {s} idx p mem)) o0:(ORL x0:(MOVWloadidx1 [i0] {s} idx p mem) s0:(SHLLconst [16] x1:(MOVBloadidx1 [i2] {s} idx p mem)))) // cond: i2 == i0+2 && i3 == i0+3 && x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && s0.Uses == 1 && s1.Uses == 1 && o0.Uses == 1 && mergePoint(b,x0,x1,x2) != nil && clobber(x0) && clobber(x1) && clobber(x2) && clobber(s0) && clobber(s1) && clobber(o0) // result: @mergePoint(b,x0,x1,x2) (MOVLloadidx1 [i0] {s} p idx mem) @@ -14436,11 +16260,6 @@ func rewriteValue386_Op386ORL_40(v *Value) bool { v0.AddArg(mem) return true } - return false -} -func rewriteValue386_Op386ORL_50(v *Value) bool { - b := v.Block - _ = b // match: (ORL s1:(SHLLconst [24] x2:(MOVBloadidx1 [i3] {s} idx p mem)) o0:(ORL s0:(SHLLconst [16] x1:(MOVBloadidx1 [i2] {s} p idx mem)) x0:(MOVWloadidx1 [i0] {s} p idx mem))) // cond: i2 == i0+2 && i3 == i0+3 && x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && s0.Uses == 1 && s1.Uses == 1 && o0.Uses == 1 && mergePoint(b,x0,x1,x2) != nil && clobber(x0) && clobber(x1) && clobber(x2) && clobber(s0) && clobber(s1) && clobber(o0) // result: @mergePoint(b,x0,x1,x2) (MOVLloadidx1 [i0] {s} p idx mem) @@ -15130,6 +16949,92 @@ func rewriteValue386_Op386ORLconstmodify_0(v *Value) bool { } return false } +func rewriteValue386_Op386ORLconstmodifyidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (ORLconstmodifyidx4 [valoff1] {sym} (ADDLconst [off2] base) idx mem) + // cond: ValAndOff(valoff1).canAdd(off2) + // result: (ORLconstmodifyidx4 [ValAndOff(valoff1).add(off2)] {sym} base idx mem) + for { + valoff1 := v.AuxInt + sym := v.Aux + _ = v.Args[2] + v_0 := v.Args[0] + if v_0.Op != Op386ADDLconst { + break + } + off2 := v_0.AuxInt + base := v_0.Args[0] + idx := v.Args[1] + mem := v.Args[2] + if !(ValAndOff(valoff1).canAdd(off2)) { + break + } + v.reset(Op386ORLconstmodifyidx4) + v.AuxInt = ValAndOff(valoff1).add(off2) + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ORLconstmodifyidx4 [valoff1] {sym} base (ADDLconst [off2] idx) mem) + // cond: ValAndOff(valoff1).canAdd(off2*4) + // result: (ORLconstmodifyidx4 [ValAndOff(valoff1).add(off2*4)] {sym} base idx mem) + for { + valoff1 := v.AuxInt + sym := v.Aux + _ = v.Args[2] + base := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + idx := v_1.Args[0] + mem := v.Args[2] + if !(ValAndOff(valoff1).canAdd(off2 * 4)) { + break + } + v.reset(Op386ORLconstmodifyidx4) + v.AuxInt = ValAndOff(valoff1).add(off2 * 4) + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ORLconstmodifyidx4 [valoff1] {sym1} (LEAL [off2] {sym2} base) idx mem) + // cond: ValAndOff(valoff1).canAdd(off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (ORLconstmodifyidx4 [ValAndOff(valoff1).add(off2)] {mergeSym(sym1,sym2)} base idx mem) + for { + valoff1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[2] + v_0 := v.Args[0] + if v_0.Op != Op386LEAL { + break + } + off2 := v_0.AuxInt + sym2 := v_0.Aux + base := v_0.Args[0] + idx := v.Args[1] + mem := v.Args[2] + if !(ValAndOff(valoff1).canAdd(off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386ORLconstmodifyidx4) + v.AuxInt = ValAndOff(valoff1).add(off2) + v.Aux = mergeSym(sym1, sym2) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} func rewriteValue386_Op386ORLload_0(v *Value) bool { b := v.Block _ = b @@ -15188,6 +17093,128 @@ func rewriteValue386_Op386ORLload_0(v *Value) bool { v.AddArg(mem) return true } + // match: (ORLload [off1] {sym1} val (LEAL4 [off2] {sym2} ptr idx) mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) + // result: (ORLloadidx4 [off1+off2] {mergeSym(sym1,sym2)} val ptr idx mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[2] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386LEAL4 { + break + } + off2 := v_1.AuxInt + sym2 := v_1.Aux + _ = v_1.Args[1] + ptr := v_1.Args[0] + idx := v_1.Args[1] + mem := v.Args[2] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2)) { + break + } + v.reset(Op386ORLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(val) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} +func rewriteValue386_Op386ORLloadidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (ORLloadidx4 [off1] {sym} val (ADDLconst [off2] base) idx mem) + // cond: is32Bit(off1+off2) + // result: (ORLloadidx4 [off1+off2] {sym} val base idx mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + base := v_1.Args[0] + idx := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2)) { + break + } + v.reset(Op386ORLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = sym + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ORLloadidx4 [off1] {sym} val base (ADDLconst [off2] idx) mem) + // cond: is32Bit(off1+off2*4) + // result: (ORLloadidx4 [off1+off2*4] {sym} val base idx mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + val := v.Args[0] + base := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386ADDLconst { + break + } + off2 := v_2.AuxInt + idx := v_2.Args[0] + mem := v.Args[3] + if !(is32Bit(off1 + off2*4)) { + break + } + v.reset(Op386ORLloadidx4) + v.AuxInt = off1 + off2*4 + v.Aux = sym + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (ORLloadidx4 [off1] {sym1} val (LEAL [off2] {sym2} base) idx mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (ORLloadidx4 [off1+off2] {mergeSym(sym1,sym2)} val base idx mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[3] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386LEAL { + break + } + off2 := v_1.AuxInt + sym2 := v_1.Aux + base := v_1.Args[0] + idx := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386ORLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } return false } func rewriteValue386_Op386ORLmodify_0(v *Value) bool { @@ -15250,6 +17277,124 @@ func rewriteValue386_Op386ORLmodify_0(v *Value) bool { } return false } +func rewriteValue386_Op386ORLmodifyidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (ORLmodifyidx4 [off1] {sym} (ADDLconst [off2] base) idx val mem) + // cond: is32Bit(off1+off2) + // result: (ORLmodifyidx4 [off1+off2] {sym} base idx val mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + v_0 := v.Args[0] + if v_0.Op != Op386ADDLconst { + break + } + off2 := v_0.AuxInt + base := v_0.Args[0] + idx := v.Args[1] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2)) { + break + } + v.reset(Op386ORLmodifyidx4) + v.AuxInt = off1 + off2 + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (ORLmodifyidx4 [off1] {sym} base (ADDLconst [off2] idx) val mem) + // cond: is32Bit(off1+off2*4) + // result: (ORLmodifyidx4 [off1+off2*4] {sym} base idx val mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + base := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + idx := v_1.Args[0] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2*4)) { + break + } + v.reset(Op386ORLmodifyidx4) + v.AuxInt = off1 + off2*4 + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (ORLmodifyidx4 [off1] {sym1} (LEAL [off2] {sym2} base) idx val mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (ORLmodifyidx4 [off1+off2] {mergeSym(sym1,sym2)} base idx val mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[3] + v_0 := v.Args[0] + if v_0.Op != Op386LEAL { + break + } + off2 := v_0.AuxInt + sym2 := v_0.Aux + base := v_0.Args[0] + idx := v.Args[1] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386ORLmodifyidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (ORLmodifyidx4 [off] {sym} ptr idx (MOVLconst [c]) mem) + // cond: validValAndOff(c,off) + // result: (ORLconstmodifyidx4 [makeValAndOff(c,off)] {sym} ptr idx mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386MOVLconst { + break + } + c := v_2.AuxInt + mem := v.Args[3] + if !(validValAndOff(c, off)) { + break + } + v.reset(Op386ORLconstmodifyidx4) + v.AuxInt = makeValAndOff(c, off) + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} func rewriteValue386_Op386ROLBconst_0(v *Value) bool { // match: (ROLBconst [c] (ROLBconst [d] x)) // cond: @@ -16637,6 +18782,34 @@ func rewriteValue386_Op386SUBL_0(v *Value) bool { v.AddArg(mem) return true } + // match: (SUBL x l:(MOVLloadidx4 [off] {sym} ptr idx mem)) + // cond: canMergeLoad(v, l, x) && clobber(l) + // result: (SUBLloadidx4 x [off] {sym} ptr idx mem) + for { + _ = v.Args[1] + x := v.Args[0] + l := v.Args[1] + if l.Op != Op386MOVLloadidx4 { + break + } + off := l.AuxInt + sym := l.Aux + _ = l.Args[2] + ptr := l.Args[0] + idx := l.Args[1] + mem := l.Args[2] + if !(canMergeLoad(v, l, x) && clobber(l)) { + break + } + v.reset(Op386SUBLloadidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(x) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } // match: (SUBL x x) // cond: // result: (MOVLconst [0]) @@ -16756,6 +18929,128 @@ func rewriteValue386_Op386SUBLload_0(v *Value) bool { v.AddArg(mem) return true } + // match: (SUBLload [off1] {sym1} val (LEAL4 [off2] {sym2} ptr idx) mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) + // result: (SUBLloadidx4 [off1+off2] {mergeSym(sym1,sym2)} val ptr idx mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[2] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386LEAL4 { + break + } + off2 := v_1.AuxInt + sym2 := v_1.Aux + _ = v_1.Args[1] + ptr := v_1.Args[0] + idx := v_1.Args[1] + mem := v.Args[2] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2)) { + break + } + v.reset(Op386SUBLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(val) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} +func rewriteValue386_Op386SUBLloadidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (SUBLloadidx4 [off1] {sym} val (ADDLconst [off2] base) idx mem) + // cond: is32Bit(off1+off2) + // result: (SUBLloadidx4 [off1+off2] {sym} val base idx mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + base := v_1.Args[0] + idx := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2)) { + break + } + v.reset(Op386SUBLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = sym + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (SUBLloadidx4 [off1] {sym} val base (ADDLconst [off2] idx) mem) + // cond: is32Bit(off1+off2*4) + // result: (SUBLloadidx4 [off1+off2*4] {sym} val base idx mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + val := v.Args[0] + base := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386ADDLconst { + break + } + off2 := v_2.AuxInt + idx := v_2.Args[0] + mem := v.Args[3] + if !(is32Bit(off1 + off2*4)) { + break + } + v.reset(Op386SUBLloadidx4) + v.AuxInt = off1 + off2*4 + v.Aux = sym + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (SUBLloadidx4 [off1] {sym1} val (LEAL [off2] {sym2} base) idx mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (SUBLloadidx4 [off1+off2] {mergeSym(sym1,sym2)} val base idx mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[3] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386LEAL { + break + } + off2 := v_1.AuxInt + sym2 := v_1.Aux + base := v_1.Args[0] + idx := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386SUBLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } return false } func rewriteValue386_Op386SUBLmodify_0(v *Value) bool { @@ -16818,6 +19113,124 @@ func rewriteValue386_Op386SUBLmodify_0(v *Value) bool { } return false } +func rewriteValue386_Op386SUBLmodifyidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (SUBLmodifyidx4 [off1] {sym} (ADDLconst [off2] base) idx val mem) + // cond: is32Bit(off1+off2) + // result: (SUBLmodifyidx4 [off1+off2] {sym} base idx val mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + v_0 := v.Args[0] + if v_0.Op != Op386ADDLconst { + break + } + off2 := v_0.AuxInt + base := v_0.Args[0] + idx := v.Args[1] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2)) { + break + } + v.reset(Op386SUBLmodifyidx4) + v.AuxInt = off1 + off2 + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (SUBLmodifyidx4 [off1] {sym} base (ADDLconst [off2] idx) val mem) + // cond: is32Bit(off1+off2*4) + // result: (SUBLmodifyidx4 [off1+off2*4] {sym} base idx val mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + base := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + idx := v_1.Args[0] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2*4)) { + break + } + v.reset(Op386SUBLmodifyidx4) + v.AuxInt = off1 + off2*4 + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (SUBLmodifyidx4 [off1] {sym1} (LEAL [off2] {sym2} base) idx val mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (SUBLmodifyidx4 [off1+off2] {mergeSym(sym1,sym2)} base idx val mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[3] + v_0 := v.Args[0] + if v_0.Op != Op386LEAL { + break + } + off2 := v_0.AuxInt + sym2 := v_0.Aux + base := v_0.Args[0] + idx := v.Args[1] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386SUBLmodifyidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (SUBLmodifyidx4 [off] {sym} ptr idx (MOVLconst [c]) mem) + // cond: validValAndOff(-c,off) + // result: (ADDLconstmodifyidx4 [makeValAndOff(-c,off)] {sym} ptr idx mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386MOVLconst { + break + } + c := v_2.AuxInt + mem := v.Args[3] + if !(validValAndOff(-c, off)) { + break + } + v.reset(Op386ADDLconstmodifyidx4) + v.AuxInt = makeValAndOff(-c, off) + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} func rewriteValue386_Op386SUBSD_0(v *Value) bool { b := v.Block _ = b @@ -17258,6 +19671,62 @@ func rewriteValue386_Op386XORL_0(v *Value) bool { return false } func rewriteValue386_Op386XORL_10(v *Value) bool { + // match: (XORL x l:(MOVLloadidx4 [off] {sym} ptr idx mem)) + // cond: canMergeLoad(v, l, x) && clobber(l) + // result: (XORLloadidx4 x [off] {sym} ptr idx mem) + for { + _ = v.Args[1] + x := v.Args[0] + l := v.Args[1] + if l.Op != Op386MOVLloadidx4 { + break + } + off := l.AuxInt + sym := l.Aux + _ = l.Args[2] + ptr := l.Args[0] + idx := l.Args[1] + mem := l.Args[2] + if !(canMergeLoad(v, l, x) && clobber(l)) { + break + } + v.reset(Op386XORLloadidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(x) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (XORL l:(MOVLloadidx4 [off] {sym} ptr idx mem) x) + // cond: canMergeLoad(v, l, x) && clobber(l) + // result: (XORLloadidx4 x [off] {sym} ptr idx mem) + for { + _ = v.Args[1] + l := v.Args[0] + if l.Op != Op386MOVLloadidx4 { + break + } + off := l.AuxInt + sym := l.Aux + _ = l.Args[2] + ptr := l.Args[0] + idx := l.Args[1] + mem := l.Args[2] + x := v.Args[1] + if !(canMergeLoad(v, l, x) && clobber(l)) { + break + } + v.reset(Op386XORLloadidx4) + v.AuxInt = off + v.Aux = sym + v.AddArg(x) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } // match: (XORL x x) // cond: // result: (MOVLconst [0]) @@ -17376,6 +19845,92 @@ func rewriteValue386_Op386XORLconstmodify_0(v *Value) bool { } return false } +func rewriteValue386_Op386XORLconstmodifyidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (XORLconstmodifyidx4 [valoff1] {sym} (ADDLconst [off2] base) idx mem) + // cond: ValAndOff(valoff1).canAdd(off2) + // result: (XORLconstmodifyidx4 [ValAndOff(valoff1).add(off2)] {sym} base idx mem) + for { + valoff1 := v.AuxInt + sym := v.Aux + _ = v.Args[2] + v_0 := v.Args[0] + if v_0.Op != Op386ADDLconst { + break + } + off2 := v_0.AuxInt + base := v_0.Args[0] + idx := v.Args[1] + mem := v.Args[2] + if !(ValAndOff(valoff1).canAdd(off2)) { + break + } + v.reset(Op386XORLconstmodifyidx4) + v.AuxInt = ValAndOff(valoff1).add(off2) + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (XORLconstmodifyidx4 [valoff1] {sym} base (ADDLconst [off2] idx) mem) + // cond: ValAndOff(valoff1).canAdd(off2*4) + // result: (XORLconstmodifyidx4 [ValAndOff(valoff1).add(off2*4)] {sym} base idx mem) + for { + valoff1 := v.AuxInt + sym := v.Aux + _ = v.Args[2] + base := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + idx := v_1.Args[0] + mem := v.Args[2] + if !(ValAndOff(valoff1).canAdd(off2 * 4)) { + break + } + v.reset(Op386XORLconstmodifyidx4) + v.AuxInt = ValAndOff(valoff1).add(off2 * 4) + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (XORLconstmodifyidx4 [valoff1] {sym1} (LEAL [off2] {sym2} base) idx mem) + // cond: ValAndOff(valoff1).canAdd(off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (XORLconstmodifyidx4 [ValAndOff(valoff1).add(off2)] {mergeSym(sym1,sym2)} base idx mem) + for { + valoff1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[2] + v_0 := v.Args[0] + if v_0.Op != Op386LEAL { + break + } + off2 := v_0.AuxInt + sym2 := v_0.Aux + base := v_0.Args[0] + idx := v.Args[1] + mem := v.Args[2] + if !(ValAndOff(valoff1).canAdd(off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386XORLconstmodifyidx4) + v.AuxInt = ValAndOff(valoff1).add(off2) + v.Aux = mergeSym(sym1, sym2) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} func rewriteValue386_Op386XORLload_0(v *Value) bool { b := v.Block _ = b @@ -17434,6 +19989,128 @@ func rewriteValue386_Op386XORLload_0(v *Value) bool { v.AddArg(mem) return true } + // match: (XORLload [off1] {sym1} val (LEAL4 [off2] {sym2} ptr idx) mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) + // result: (XORLloadidx4 [off1+off2] {mergeSym(sym1,sym2)} val ptr idx mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[2] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386LEAL4 { + break + } + off2 := v_1.AuxInt + sym2 := v_1.Aux + _ = v_1.Args[1] + ptr := v_1.Args[0] + idx := v_1.Args[1] + mem := v.Args[2] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2)) { + break + } + v.reset(Op386XORLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(val) + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} +func rewriteValue386_Op386XORLloadidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (XORLloadidx4 [off1] {sym} val (ADDLconst [off2] base) idx mem) + // cond: is32Bit(off1+off2) + // result: (XORLloadidx4 [off1+off2] {sym} val base idx mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + base := v_1.Args[0] + idx := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2)) { + break + } + v.reset(Op386XORLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = sym + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (XORLloadidx4 [off1] {sym} val base (ADDLconst [off2] idx) mem) + // cond: is32Bit(off1+off2*4) + // result: (XORLloadidx4 [off1+off2*4] {sym} val base idx mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + val := v.Args[0] + base := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386ADDLconst { + break + } + off2 := v_2.AuxInt + idx := v_2.Args[0] + mem := v.Args[3] + if !(is32Bit(off1 + off2*4)) { + break + } + v.reset(Op386XORLloadidx4) + v.AuxInt = off1 + off2*4 + v.Aux = sym + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } + // match: (XORLloadidx4 [off1] {sym1} val (LEAL [off2] {sym2} base) idx mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (XORLloadidx4 [off1+off2] {mergeSym(sym1,sym2)} val base idx mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[3] + val := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386LEAL { + break + } + off2 := v_1.AuxInt + sym2 := v_1.Aux + base := v_1.Args[0] + idx := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386XORLloadidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(val) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(mem) + return true + } return false } func rewriteValue386_Op386XORLmodify_0(v *Value) bool { @@ -17496,6 +20173,124 @@ func rewriteValue386_Op386XORLmodify_0(v *Value) bool { } return false } +func rewriteValue386_Op386XORLmodifyidx4_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (XORLmodifyidx4 [off1] {sym} (ADDLconst [off2] base) idx val mem) + // cond: is32Bit(off1+off2) + // result: (XORLmodifyidx4 [off1+off2] {sym} base idx val mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + v_0 := v.Args[0] + if v_0.Op != Op386ADDLconst { + break + } + off2 := v_0.AuxInt + base := v_0.Args[0] + idx := v.Args[1] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2)) { + break + } + v.reset(Op386XORLmodifyidx4) + v.AuxInt = off1 + off2 + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (XORLmodifyidx4 [off1] {sym} base (ADDLconst [off2] idx) val mem) + // cond: is32Bit(off1+off2*4) + // result: (XORLmodifyidx4 [off1+off2*4] {sym} base idx val mem) + for { + off1 := v.AuxInt + sym := v.Aux + _ = v.Args[3] + base := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386ADDLconst { + break + } + off2 := v_1.AuxInt + idx := v_1.Args[0] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1 + off2*4)) { + break + } + v.reset(Op386XORLmodifyidx4) + v.AuxInt = off1 + off2*4 + v.Aux = sym + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (XORLmodifyidx4 [off1] {sym1} (LEAL [off2] {sym2} base) idx val mem) + // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared) + // result: (XORLmodifyidx4 [off1+off2] {mergeSym(sym1,sym2)} base idx val mem) + for { + off1 := v.AuxInt + sym1 := v.Aux + _ = v.Args[3] + v_0 := v.Args[0] + if v_0.Op != Op386LEAL { + break + } + off2 := v_0.AuxInt + sym2 := v_0.Aux + base := v_0.Args[0] + idx := v.Args[1] + val := v.Args[2] + mem := v.Args[3] + if !(is32Bit(off1+off2) && canMergeSym(sym1, sym2) && (base.Op != OpSB || !config.ctxt.Flag_shared)) { + break + } + v.reset(Op386XORLmodifyidx4) + v.AuxInt = off1 + off2 + v.Aux = mergeSym(sym1, sym2) + v.AddArg(base) + v.AddArg(idx) + v.AddArg(val) + v.AddArg(mem) + return true + } + // match: (XORLmodifyidx4 [off] {sym} ptr idx (MOVLconst [c]) mem) + // cond: validValAndOff(c,off) + // result: (XORLconstmodifyidx4 [makeValAndOff(c,off)] {sym} ptr idx mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[3] + ptr := v.Args[0] + idx := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386MOVLconst { + break + } + c := v_2.AuxInt + mem := v.Args[3] + if !(validValAndOff(c, off)) { + break + } + v.reset(Op386XORLconstmodifyidx4) + v.AuxInt = makeValAndOff(c, off) + v.Aux = sym + v.AddArg(ptr) + v.AddArg(idx) + v.AddArg(mem) + return true + } + return false +} func rewriteValue386_OpAdd16_0(v *Value) bool { // match: (Add16 x y) // cond: diff --git a/src/cmd/compile/internal/x86/ssa.go b/src/cmd/compile/internal/x86/ssa.go index 8f8ee75eec..4ed46b9c8c 100644 --- a/src/cmd/compile/internal/x86/ssa.go +++ b/src/cmd/compile/internal/x86/ssa.go @@ -508,6 +508,19 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { gc.AddAux(&p.From, v) p.To.Type = obj.TYPE_REG p.To.Reg = v.Reg() + case ssa.Op386ADDLloadidx4, ssa.Op386SUBLloadidx4, ssa.Op386MULLloadidx4, + ssa.Op386ANDLloadidx4, ssa.Op386ORLloadidx4, ssa.Op386XORLloadidx4: + p := s.Prog(v.Op.Asm()) + p.From.Type = obj.TYPE_MEM + p.From.Reg = v.Args[1].Reg() + p.From.Index = v.Args[2].Reg() + p.From.Scale = 4 + gc.AddAux(&p.From, v) + p.To.Type = obj.TYPE_REG + p.To.Reg = v.Reg() + if v.Reg() != v.Args[0].Reg() { + v.Fatalf("input[0] and output not in same register %s", v.LongString()) + } case ssa.Op386ADDLload, ssa.Op386SUBLload, ssa.Op386MULLload, ssa.Op386ANDLload, ssa.Op386ORLload, ssa.Op386XORLload, ssa.Op386ADDSDload, ssa.Op386ADDSSload, ssa.Op386SUBSDload, ssa.Op386SUBSSload, @@ -557,7 +570,8 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { p.To.Reg = v.Args[0].Reg() gc.AddAux2(&p.To, v, off) case ssa.Op386MOVBstoreidx1, ssa.Op386MOVWstoreidx1, ssa.Op386MOVLstoreidx1, ssa.Op386MOVSSstoreidx1, ssa.Op386MOVSDstoreidx1, - ssa.Op386MOVSDstoreidx8, ssa.Op386MOVSSstoreidx4, ssa.Op386MOVLstoreidx4, ssa.Op386MOVWstoreidx2: + ssa.Op386MOVSDstoreidx8, ssa.Op386MOVSSstoreidx4, ssa.Op386MOVLstoreidx4, ssa.Op386MOVWstoreidx2, + ssa.Op386ADDLmodifyidx4, ssa.Op386SUBLmodifyidx4, ssa.Op386ANDLmodifyidx4, ssa.Op386ORLmodifyidx4, ssa.Op386XORLmodifyidx4: r := v.Args[0].Reg() i := v.Args[1].Reg() p := s.Prog(v.Op.Asm()) @@ -572,7 +586,8 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { p.To.Scale = 1 case ssa.Op386MOVSDstoreidx8: p.To.Scale = 8 - case ssa.Op386MOVSSstoreidx4, ssa.Op386MOVLstoreidx4: + case ssa.Op386MOVSSstoreidx4, ssa.Op386MOVLstoreidx4, + ssa.Op386ADDLmodifyidx4, ssa.Op386SUBLmodifyidx4, ssa.Op386ANDLmodifyidx4, ssa.Op386ORLmodifyidx4, ssa.Op386XORLmodifyidx4: p.To.Scale = 4 case ssa.Op386MOVWstoreidx2: p.To.Scale = 2 @@ -588,7 +603,8 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { p.To.Type = obj.TYPE_MEM p.To.Reg = v.Args[0].Reg() gc.AddAux2(&p.To, v, sc.Off()) - case ssa.Op386MOVLstoreconstidx1, ssa.Op386MOVLstoreconstidx4, ssa.Op386MOVWstoreconstidx1, ssa.Op386MOVWstoreconstidx2, ssa.Op386MOVBstoreconstidx1: + case ssa.Op386MOVLstoreconstidx1, ssa.Op386MOVLstoreconstidx4, ssa.Op386MOVWstoreconstidx1, ssa.Op386MOVWstoreconstidx2, ssa.Op386MOVBstoreconstidx1, + ssa.Op386ADDLconstmodifyidx4, ssa.Op386ANDLconstmodifyidx4, ssa.Op386ORLconstmodifyidx4, ssa.Op386XORLconstmodifyidx4: p := s.Prog(v.Op.Asm()) p.From.Type = obj.TYPE_CONST sc := v.AuxValAndOff() @@ -603,7 +619,8 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { } case ssa.Op386MOVWstoreconstidx2: p.To.Scale = 2 - case ssa.Op386MOVLstoreconstidx4: + case ssa.Op386MOVLstoreconstidx4, + ssa.Op386ADDLconstmodifyidx4, ssa.Op386ANDLconstmodifyidx4, ssa.Op386ORLconstmodifyidx4, ssa.Op386XORLconstmodifyidx4: p.To.Scale = 4 } p.To.Type = obj.TYPE_MEM diff --git a/test/codegen/arithmetic.go b/test/codegen/arithmetic.go index 8e2a210948..0b209f5130 100644 --- a/test/codegen/arithmetic.go +++ b/test/codegen/arithmetic.go @@ -14,7 +14,8 @@ package codegen // Subtraction // // ----------------- // -func SubMem(arr []int, b int) int { +var ef int +func SubMem(arr []int, b, c, d int) int { // 386:`SUBL\s[A-Z]+,\s8\([A-Z]+\)` // amd64:`SUBQ\s[A-Z]+,\s16\([A-Z]+\)` arr[2] -= b @@ -25,6 +26,12 @@ func SubMem(arr []int, b int) int { arr[4]-- // 386:`ADDL\s[$]-20,\s20\([A-Z]+\)` arr[5] -= 20 + // 386:`SUBL\s\([A-Z]+\)\([A-Z]+\*4\),\s[A-Z]+` + ef -= arr[b] + // 386:`SUBL\s[A-Z]+,\s\([A-Z]+\)\([A-Z]+\*4\)` + arr[c] -= b + // 386:`ADDL\s[$]-15,\s\([A-Z]+\)\([A-Z]+\*4\)` + arr[d] -= 15 // 386:"SUBL\t4" // amd64:"SUBQ\t8" return arr[0] - arr[1] From ccc337d8eeedbf94f56adb7ab22ce009056d0973 Mon Sep 17 00:00:00 2001 From: Ben Shi Date: Mon, 8 Oct 2018 02:20:03 +0000 Subject: [PATCH 053/240] cmd/compile: combine similar code in amd64's assembly generator BSFQ/BSRQ/BSFL/BSRL/SQRTSD have similar logic in amd64's assembly generator. This CL combines them together while does not impact generated amd64 code. The total size of pkg/linux_amd64/cmd/compile/internal decreases about 1.8KB. Change-Id: I5f3210c5178c20ac9108877c69f17234baf5b6b7 Reviewed-on: https://go-review.googlesource.com/c/140438 Run-TryBot: Ben Shi TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/cmd/compile/internal/amd64/ssa.go | 37 +++++++++++---------------- 1 file changed, 15 insertions(+), 22 deletions(-) diff --git a/src/cmd/compile/internal/amd64/ssa.go b/src/cmd/compile/internal/amd64/ssa.go index b5e31e1601..f12e4cb5ec 100644 --- a/src/cmd/compile/internal/amd64/ssa.go +++ b/src/cmd/compile/internal/amd64/ssa.go @@ -782,14 +782,14 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { // Break false dependency on destination register. opregreg(s, x86.AXORPS, r, r) opregreg(s, v.Op.Asm(), r, v.Args[0].Reg()) - case ssa.OpAMD64MOVQi2f, ssa.OpAMD64MOVQf2i: - p := s.Prog(x86.AMOVQ) - p.From.Type = obj.TYPE_REG - p.From.Reg = v.Args[0].Reg() - p.To.Type = obj.TYPE_REG - p.To.Reg = v.Reg() - case ssa.OpAMD64MOVLi2f, ssa.OpAMD64MOVLf2i: - p := s.Prog(x86.AMOVL) + case ssa.OpAMD64MOVQi2f, ssa.OpAMD64MOVQf2i, ssa.OpAMD64MOVLi2f, ssa.OpAMD64MOVLf2i: + var p *obj.Prog + switch v.Op { + case ssa.OpAMD64MOVQi2f, ssa.OpAMD64MOVQf2i: + p = s.Prog(x86.AMOVQ) + case ssa.OpAMD64MOVLi2f, ssa.OpAMD64MOVLf2i: + p = s.Prog(x86.AMOVL) + } p.From.Type = obj.TYPE_REG p.From.Reg = v.Args[0].Reg() p.To.Type = obj.TYPE_REG @@ -934,24 +934,17 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { p := s.Prog(v.Op.Asm()) p.To.Type = obj.TYPE_REG p.To.Reg = r - case ssa.OpAMD64BSFQ, ssa.OpAMD64BSRQ: + case ssa.OpAMD64BSFQ, ssa.OpAMD64BSRQ, ssa.OpAMD64BSFL, ssa.OpAMD64BSRL, ssa.OpAMD64SQRTSD: p := s.Prog(v.Op.Asm()) p.From.Type = obj.TYPE_REG p.From.Reg = v.Args[0].Reg() p.To.Type = obj.TYPE_REG - p.To.Reg = v.Reg0() - case ssa.OpAMD64BSFL, ssa.OpAMD64BSRL: - p := s.Prog(v.Op.Asm()) - p.From.Type = obj.TYPE_REG - p.From.Reg = v.Args[0].Reg() - p.To.Type = obj.TYPE_REG - p.To.Reg = v.Reg() - case ssa.OpAMD64SQRTSD: - p := s.Prog(v.Op.Asm()) - p.From.Type = obj.TYPE_REG - p.From.Reg = v.Args[0].Reg() - p.To.Type = obj.TYPE_REG - p.To.Reg = v.Reg() + switch v.Op { + case ssa.OpAMD64BSFQ, ssa.OpAMD64BSRQ: + p.To.Reg = v.Reg0() + case ssa.OpAMD64BSFL, ssa.OpAMD64BSRL, ssa.OpAMD64SQRTSD: + p.To.Reg = v.Reg() + } case ssa.OpAMD64ROUNDSD: p := s.Prog(v.Op.Asm()) val := v.AuxInt From 465d1c61685db9e249d77db7d4ceca578f400b27 Mon Sep 17 00:00:00 2001 From: Marten Seemann Date: Fri, 17 Aug 2018 18:03:55 +0700 Subject: [PATCH 054/240] crypto/tls: fix ServerHello SCT test According to https://tools.ietf.org/html/rfc6962#section-3.3, the SCT must be at least one byte long. The parsing code correctly checks for this condition, but rarely the test does generate an empty SCT. Change-Id: If36a34985b4470a5a9f96affc159195c04f6bfad Reviewed-on: https://go-review.googlesource.com/c/129755 Reviewed-by: Filippo Valsorda Reviewed-by: Brad Fitzpatrick --- src/crypto/tls/handshake_messages_test.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/crypto/tls/handshake_messages_test.go b/src/crypto/tls/handshake_messages_test.go index 37eb748eea..4a4a466768 100644 --- a/src/crypto/tls/handshake_messages_test.go +++ b/src/crypto/tls/handshake_messages_test.go @@ -188,7 +188,7 @@ func (*serverHelloMsg) Generate(rand *rand.Rand, size int) reflect.Value { numSCTs := rand.Intn(4) m.scts = make([][]byte, numSCTs) for i := range m.scts { - m.scts[i] = randomBytes(rand.Intn(500), rand) + m.scts[i] = randomBytes(rand.Intn(500)+1, rand) } } From ffc7bc55f351976c9bb1e04aeba75397d40cbb53 Mon Sep 17 00:00:00 2001 From: Qais Patankar Date: Tue, 9 Oct 2018 10:14:59 +0100 Subject: [PATCH 055/240] cmd/compile: fix Compiler Directives typo Change-Id: I098b3c627c2142affd4e800a2c1f37e00f3775c5 Reviewed-on: https://go-review.googlesource.com/c/140777 Reviewed-by: Brad Fitzpatrick --- src/cmd/compile/doc.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/cmd/compile/doc.go b/src/cmd/compile/doc.go index b68314cf73..3dc73a8fde 100644 --- a/src/cmd/compile/doc.go +++ b/src/cmd/compile/doc.go @@ -146,7 +146,7 @@ directive can skip over a directive like any other comment. // will report positions in the original input to the generator. /* The line directive is an historical special case; all other directives are of the form -//go:name and must start at the begnning of a line, indicating that the directive is defined +//go:name and must start at the beginning of a line, indicating that the directive is defined by the Go toolchain. //go:noescape From 5440bfc2ea8c0a4c78d5161605659c07ea10e37a Mon Sep 17 00:00:00 2001 From: Brad Fitzpatrick Date: Tue, 25 Sep 2018 16:13:17 +0000 Subject: [PATCH 056/240] net/http/httputil: rewrite flushing code, disable on Server-Sent Events * Rewrite the flushing code to not use a persistent goroutine, which also simplifies testing. * Define the meaning of a negative flush interval. Its meaning doesn't change, but now it's locked in, and then we can use it to optimize the performance of the non-buffered case to avoid use of an AfterFunc. * Support (internal-only) special casing of FlushInterval values per request/response. * For now, treat Server-Sent Event responses as unbuffered. (or rather, immediately flushed from the buffer per-write) Fixes #27816 Change-Id: Ie0f975c997daa3db539504137c741a96d7022665 Reviewed-on: https://go-review.googlesource.com/c/137335 Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot Reviewed-by: Dmitri Shuralyov --- src/net/http/httputil/reverseproxy.go | 89 ++++++++++++++-------- src/net/http/httputil/reverseproxy_test.go | 56 +++++++++++--- 2 files changed, 102 insertions(+), 43 deletions(-) diff --git a/src/net/http/httputil/reverseproxy.go b/src/net/http/httputil/reverseproxy.go index 1dddaa95a7..1efcbd3bbc 100644 --- a/src/net/http/httputil/reverseproxy.go +++ b/src/net/http/httputil/reverseproxy.go @@ -18,10 +18,6 @@ import ( "time" ) -// onExitFlushLoop is a callback set by tests to detect the state of the -// flushLoop() goroutine. -var onExitFlushLoop func() - // ReverseProxy is an HTTP Handler that takes an incoming request and // sends it to another server, proxying the response back to the // client. @@ -42,6 +38,12 @@ type ReverseProxy struct { // to flush to the client while copying the // response body. // If zero, no periodic flushing is done. + // A negative value means to flush immediately + // after each write to the client. + // The FlushInterval is ignored when ReverseProxy + // recognizes a response as a streaming response; + // for such reponses, writes are flushed to the client + // immediately. FlushInterval time.Duration // ErrorLog specifies an optional logger for errors @@ -271,7 +273,7 @@ func (p *ReverseProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request) { fl.Flush() } } - err = p.copyResponse(rw, res.Body) + err = p.copyResponse(rw, res.Body, p.flushInterval(req, res)) if err != nil { defer res.Body.Close() // Since we're streaming the response, if we run into an error all we can do @@ -332,15 +334,28 @@ func removeConnectionHeaders(h http.Header) { } } -func (p *ReverseProxy) copyResponse(dst io.Writer, src io.Reader) error { - if p.FlushInterval != 0 { +// flushInterval returns the p.FlushInterval value, conditionally +// overriding its value for a specific request/response. +func (p *ReverseProxy) flushInterval(req *http.Request, res *http.Response) time.Duration { + resCT := res.Header.Get("Content-Type") + + // For Server-Sent Events responses, flush immediately. + // The MIME type is defined in https://www.w3.org/TR/eventsource/#text-event-stream + if resCT == "text/event-stream" { + return -1 // negative means immediately + } + + // TODO: more specific cases? e.g. res.ContentLength == -1? + return p.FlushInterval +} + +func (p *ReverseProxy) copyResponse(dst io.Writer, src io.Reader, flushInterval time.Duration) error { + if flushInterval != 0 { if wf, ok := dst.(writeFlusher); ok { mlw := &maxLatencyWriter{ dst: wf, - latency: p.FlushInterval, - done: make(chan bool), + latency: flushInterval, } - go mlw.flushLoop() defer mlw.stop() dst = mlw } @@ -403,34 +418,44 @@ type writeFlusher interface { type maxLatencyWriter struct { dst writeFlusher - latency time.Duration + latency time.Duration // non-zero; negative means to flush immediately - mu sync.Mutex // protects Write + Flush - done chan bool + mu sync.Mutex // protects t, flushPending, and dst.Flush + t *time.Timer + flushPending bool } -func (m *maxLatencyWriter) Write(p []byte) (int, error) { +func (m *maxLatencyWriter) Write(p []byte) (n int, err error) { m.mu.Lock() defer m.mu.Unlock() - return m.dst.Write(p) + n, err = m.dst.Write(p) + if m.latency < 0 { + m.dst.Flush() + return + } + if m.flushPending { + return + } + if m.t == nil { + m.t = time.AfterFunc(m.latency, m.delayedFlush) + } else { + m.t.Reset(m.latency) + } + m.flushPending = true + return } -func (m *maxLatencyWriter) flushLoop() { - t := time.NewTicker(m.latency) - defer t.Stop() - for { - select { - case <-m.done: - if onExitFlushLoop != nil { - onExitFlushLoop() - } - return - case <-t.C: - m.mu.Lock() - m.dst.Flush() - m.mu.Unlock() - } +func (m *maxLatencyWriter) delayedFlush() { + m.mu.Lock() + defer m.mu.Unlock() + m.dst.Flush() + m.flushPending = false +} + +func (m *maxLatencyWriter) stop() { + m.mu.Lock() + defer m.mu.Unlock() + if m.t != nil { + m.t.Stop() } } - -func (m *maxLatencyWriter) stop() { m.done <- true } diff --git a/src/net/http/httputil/reverseproxy_test.go b/src/net/http/httputil/reverseproxy_test.go index 2f75b4e34e..ddae11b168 100644 --- a/src/net/http/httputil/reverseproxy_test.go +++ b/src/net/http/httputil/reverseproxy_test.go @@ -297,10 +297,6 @@ func TestReverseProxyFlushInterval(t *testing.T) { proxyHandler := NewSingleHostReverseProxy(backendURL) proxyHandler.FlushInterval = time.Microsecond - done := make(chan bool) - onExitFlushLoop = func() { done <- true } - defer func() { onExitFlushLoop = nil }() - frontend := httptest.NewServer(proxyHandler) defer frontend.Close() @@ -314,13 +310,6 @@ func TestReverseProxyFlushInterval(t *testing.T) { if bodyBytes, _ := ioutil.ReadAll(res.Body); string(bodyBytes) != expected { t.Errorf("got body %q; expected %q", bodyBytes, expected) } - - select { - case <-done: - // OK - case <-time.After(5 * time.Second): - t.Error("maxLatencyWriter flushLoop() never exited") - } } func TestReverseProxyCancelation(t *testing.T) { @@ -946,3 +935,48 @@ func TestReverseProxy_PanicBodyError(t *testing.T) { req, _ := http.NewRequest("GET", "http://foo.tld/", nil) rproxy.ServeHTTP(httptest.NewRecorder(), req) } + +func TestSelectFlushInterval(t *testing.T) { + tests := []struct { + name string + p *ReverseProxy + req *http.Request + res *http.Response + want time.Duration + }{ + { + name: "default", + res: &http.Response{}, + p: &ReverseProxy{FlushInterval: 123}, + want: 123, + }, + { + name: "server-sent events overrides non-zero", + res: &http.Response{ + Header: http.Header{ + "Content-Type": {"text/event-stream"}, + }, + }, + p: &ReverseProxy{FlushInterval: 123}, + want: -1, + }, + { + name: "server-sent events overrides zero", + res: &http.Response{ + Header: http.Header{ + "Content-Type": {"text/event-stream"}, + }, + }, + p: &ReverseProxy{FlushInterval: 0}, + want: -1, + }, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + got := tt.p.flushInterval(tt.req, tt.res) + if got != tt.want { + t.Errorf("flushLatency = %v; want %v", got, tt.want) + } + }) + } +} From 3f86d7cc6762a5f6745cdcda4bd50031bfafc92f Mon Sep 17 00:00:00 2001 From: Austin Clements Date: Tue, 25 Sep 2018 15:44:27 -0400 Subject: [PATCH 057/240] runtime: tidy mheap.freeSpan freeSpan currently takes a mysterious "acct int32" argument. This is really just a boolean and actually just needs to match the "large" argument to alloc in order to balance out accounting. To make this clearer, replace acct with a "large bool" argument that must match the call to mheap.alloc. Change-Id: Ibc81faefdf9f0583114e1953fcfb362e9c3c76de Reviewed-on: https://go-review.googlesource.com/c/138655 Run-TryBot: Austin Clements TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/runtime/mcentral.go | 2 +- src/runtime/mgcsweep.go | 2 +- src/runtime/mheap.go | 8 ++++++-- 3 files changed, 8 insertions(+), 4 deletions(-) diff --git a/src/runtime/mcentral.go b/src/runtime/mcentral.go index 9ca8e5d222..baede31405 100644 --- a/src/runtime/mcentral.go +++ b/src/runtime/mcentral.go @@ -244,7 +244,7 @@ func (c *mcentral) freeSpan(s *mspan, preserve bool, wasempty bool) bool { c.nonempty.remove(s) unlock(&c.lock) - mheap_.freeSpan(s, 0) + mheap_.freeSpan(s, false) return true } diff --git a/src/runtime/mgcsweep.go b/src/runtime/mgcsweep.go index 00950aede2..104bd868fa 100644 --- a/src/runtime/mgcsweep.go +++ b/src/runtime/mgcsweep.go @@ -366,7 +366,7 @@ func (s *mspan) sweep(preserve bool) bool { s.limit = 0 // prevent mlookup from finding this span sysFault(unsafe.Pointer(s.base()), size) } else { - mheap_.freeSpan(s, 1) + mheap_.freeSpan(s, true) } c.local_nlargefree++ c.local_largefree += size diff --git a/src/runtime/mheap.go b/src/runtime/mheap.go index 1d672cdf21..48b3f5364a 100644 --- a/src/runtime/mheap.go +++ b/src/runtime/mheap.go @@ -945,7 +945,10 @@ func (h *mheap) grow(npage uintptr) bool { } // Free the span back into the heap. -func (h *mheap) freeSpan(s *mspan, acct int32) { +// +// large must match the value of large passed to mheap.alloc. This is +// used for accounting. +func (h *mheap) freeSpan(s *mspan, large bool) { systemstack(func() { mp := getg().m lock(&h.lock) @@ -959,7 +962,8 @@ func (h *mheap) freeSpan(s *mspan, acct int32) { bytes := s.npages << _PageShift msanfree(base, bytes) } - if acct != 0 { + if large { + // Match accounting done in mheap.alloc. memstats.heap_objects-- } if gcBlackenEnabled != 0 { From 1d09433ec072c2acff27335c2d05ce44bb501ecc Mon Sep 17 00:00:00 2001 From: Austin Clements Date: Wed, 26 Sep 2018 15:36:28 -0400 Subject: [PATCH 058/240] runtime: undo manual inlining of mbits.setMarked Since atomic.Or8 is now an intrinsic (and has been for some time), markBits.setMarked is inlinable. Undo the manual inlining of it. Change-Id: I8e37ccf0851ad1d3088d9c8ae0f6f0c439d7eb2d Reviewed-on: https://go-review.googlesource.com/c/138659 Run-TryBot: Austin Clements TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/runtime/mbitmap.go | 4 +--- src/runtime/mgcmark.go | 3 +-- 2 files changed, 2 insertions(+), 5 deletions(-) diff --git a/src/runtime/mbitmap.go b/src/runtime/mbitmap.go index 87fa027b4e..4854c0e632 100644 --- a/src/runtime/mbitmap.go +++ b/src/runtime/mbitmap.go @@ -283,9 +283,7 @@ func (m markBits) isMarked() bool { return *m.bytep&m.mask != 0 } -// setMarked sets the marked bit in the markbits, atomically. Some compilers -// are not able to inline atomic.Or8 function so if it appears as a hot spot consider -// inlining it manually. +// setMarked sets the marked bit in the markbits, atomically. func (m markBits) setMarked() { // Might be racing with other updates, so use atomic update always. // We used to be clever here and use a non-atomic update in certain diff --git a/src/runtime/mgcmark.go b/src/runtime/mgcmark.go index d4dcfb6cb9..14f09700ee 100644 --- a/src/runtime/mgcmark.go +++ b/src/runtime/mgcmark.go @@ -1228,8 +1228,7 @@ func greyobject(obj, base, off uintptr, span *mspan, gcw *gcWork, objIndex uintp if mbits.isMarked() { return } - // mbits.setMarked() // Avoid extra call overhead with manual inlining. - atomic.Or8(mbits.bytep, mbits.mask) + mbits.setMarked() // If this is a noscan object, fast-track it to black // instead of greying it. if span.spanclass.noscan() { From 7d2f46dacddba279c5b6b7520c7f6a475e6fffbc Mon Sep 17 00:00:00 2001 From: Austin Clements Date: Mon, 8 Oct 2018 19:24:46 -0400 Subject: [PATCH 059/240] runtime: fix non-in-use span check Lazy mcache flushing (golang.org/cl/134783) introduced a second value for sweepgen that indicates a span has been swept. I missed adding this case to a sanity check in sweepone, so it can now panic if it finds a non-in-use spans that's been swept *and* put in an mcache. Fix this by adding the second sweepgen case to this check. Fixes #27997. Change-Id: I568d9f2cc8923396ca897a37d154cd2c859c7bef Reviewed-on: https://go-review.googlesource.com/c/140697 Run-TryBot: Austin Clements TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/runtime/mgcsweep.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/runtime/mgcsweep.go b/src/runtime/mgcsweep.go index 104bd868fa..b7528ab68f 100644 --- a/src/runtime/mgcsweep.go +++ b/src/runtime/mgcsweep.go @@ -101,7 +101,7 @@ func sweepone() uintptr { // This can happen if direct sweeping already // swept this span, but in that case the sweep // generation should always be up-to-date. - if s.sweepgen != sg { + if !(s.sweepgen == sg || s.sweepgen == sg+3) { print("runtime: bad span s.state=", s.state, " s.sweepgen=", s.sweepgen, " sweepgen=", sg, "\n") throw("non in-use span in unswept list") } From 70d7e96c7850d141ae48e99f02a397aed1bc474b Mon Sep 17 00:00:00 2001 From: Austin Clements Date: Mon, 8 Oct 2018 13:51:10 -0400 Subject: [PATCH 060/240] runtime: avoid tracking spans with no objects with mcentral Lazy mcache flushing (golang.org/cl/134783) made it so that moving a span from an mcache to an mcentral was sometimes responsible for sweeping the span. However, it did a "preserving" sweep, which meant it retained ownership, even if the sweeper swept all objects in the span. As a result, we could put a completely unused span back in the mcentral. Fix this by first taking back ownership of the span into the mcentral and moving it to the right mcentral list, and then doing a non-preserving sweep. The non-preserving sweep will move the span to the heap if it sweeps all objects. Change-Id: I244b1893b44b8c00264f0928ac9239449775f617 Reviewed-on: https://go-review.googlesource.com/c/140597 Run-TryBot: Austin Clements TryBot-Result: Gobot Gobot Reviewed-by: Michael Knyszek --- src/runtime/mcentral.go | 35 ++++++++++++++++++----------------- 1 file changed, 18 insertions(+), 17 deletions(-) diff --git a/src/runtime/mcentral.go b/src/runtime/mcentral.go index baede31405..d94b95792c 100644 --- a/src/runtime/mcentral.go +++ b/src/runtime/mcentral.go @@ -153,16 +153,6 @@ func (c *mcentral) uncacheSpan(s *mspan) { throw("uncaching span but s.allocCount == 0") } - cap := int32((s.npages << _PageShift) / s.elemsize) - n := cap - int32(s.allocCount) - - // cacheSpan updated alloc assuming all objects on s were - // going to be allocated. Adjust for any that weren't. We must - // do this before potentially sweeping the span. - if n > 0 { - atomic.Xadd64(&c.nmalloc, -int64(n)) - } - sg := mheap_.sweepgen stale := s.sweepgen == sg+1 if stale { @@ -170,18 +160,23 @@ func (c *mcentral) uncacheSpan(s *mspan) { // responsibility to sweep it. // // Set sweepgen to indicate it's not cached but needs - // sweeping. sweep will set s.sweepgen to indicate s - // is swept. - s.sweepgen = sg - 1 - s.sweep(true) - // sweep may have freed objects, so recompute n. - n = cap - int32(s.allocCount) + // sweeping and can't be allocated from. sweep will + // set s.sweepgen to indicate s is swept. + atomic.Store(&s.sweepgen, sg-1) } else { // Indicate that s is no longer cached. - s.sweepgen = sg + atomic.Store(&s.sweepgen, sg) } + cap := int32((s.npages << _PageShift) / s.elemsize) + n := cap - int32(s.allocCount) if n > 0 { + // cacheSpan updated alloc assuming all objects on s + // were going to be allocated. Adjust for any that + // weren't. We must do this before potentially + // sweeping the span. + atomic.Xadd64(&c.nmalloc, -int64(n)) + lock(&c.lock) c.empty.remove(s) c.nonempty.insert(s) @@ -197,6 +192,12 @@ func (c *mcentral) uncacheSpan(s *mspan) { } unlock(&c.lock) } + + if stale { + // Now that s is in the right mcentral list, we can + // sweep it. + s.sweep(false) + } } // freeSpan updates c and s after sweeping s. From 416804f3e24b25cf3e291fbbe5857cc28644a852 Mon Sep 17 00:00:00 2001 From: Austin Clements Date: Tue, 25 Sep 2018 17:24:30 -0400 Subject: [PATCH 061/240] runtime: simplify free count calculation in (un)cacheSpan For unclear reasons, cacheSpan and uncacheSpan compute the number of elements in a span by dividing its size by the element size. This number is simply available in the mspan structure, so just use it. Change-Id: If2e5de6ecec39befd3324bf1da4a275ad000932f Reviewed-on: https://go-review.googlesource.com/c/138656 Run-TryBot: Austin Clements TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/runtime/mcentral.go | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/src/runtime/mcentral.go b/src/runtime/mcentral.go index d94b95792c..d9bc8b4719 100644 --- a/src/runtime/mcentral.go +++ b/src/runtime/mcentral.go @@ -117,8 +117,7 @@ havespan: if trace.enabled && !traceDone { traceGCSweepDone() } - cap := int32((s.npages << _PageShift) / s.elemsize) - n := cap - int32(s.allocCount) + n := int(s.nelems) - int(s.allocCount) if n == 0 || s.freeindex == s.nelems || uintptr(s.allocCount) == s.nelems { throw("span has no free objects") } @@ -168,8 +167,7 @@ func (c *mcentral) uncacheSpan(s *mspan) { atomic.Store(&s.sweepgen, sg) } - cap := int32((s.npages << _PageShift) / s.elemsize) - n := cap - int32(s.allocCount) + n := int(s.nelems) - int(s.allocCount) if n > 0 { // cacheSpan updated alloc assuming all objects on s // were going to be allocated. Adjust for any that From f3bb4cbfd5a02b14a8660aa7e6a08801bcb9fbaf Mon Sep 17 00:00:00 2001 From: Austin Clements Date: Tue, 25 Sep 2018 17:32:03 -0400 Subject: [PATCH 062/240] runtime: eliminate gosweepone gosweepone just switches to the system stack and calls sweepone. sweepone doesn't need to run on the system stack, so this is pretty pointless. Historically, this was necessary because the sweeper was written in C and hence needed to run on the system stack. gosweepone was the function that Go code (specifically, bgsweep) used to call into the C sweeper implementation. This probably became unnecessary in 2014 with CL golang.org/cl/167540043, which ported the sweeper to Go. This CL changes all callers of gosweepone to call sweepone and eliminates gosweepone. Change-Id: I26b8ef0c7d060b4c0c5dedbb25ecfc936acc7269 Reviewed-on: https://go-review.googlesource.com/c/138657 Run-TryBot: Austin Clements TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/runtime/mgc.go | 4 ++-- src/runtime/mgcsweep.go | 18 ++++-------------- 2 files changed, 6 insertions(+), 16 deletions(-) diff --git a/src/runtime/mgc.go b/src/runtime/mgc.go index 2c6af43da5..9a35c7671f 100644 --- a/src/runtime/mgc.go +++ b/src/runtime/mgc.go @@ -1061,7 +1061,7 @@ func GC() { // complete the cycle and because runtime.GC() is often used // as part of tests and benchmarks to get the system into a // relatively stable and isolated state. - for atomic.Load(&work.cycles) == n+1 && gosweepone() != ^uintptr(0) { + for atomic.Load(&work.cycles) == n+1 && sweepone() != ^uintptr(0) { sweep.nbgsweep++ Gosched() } @@ -1219,7 +1219,7 @@ func gcStart(trigger gcTrigger) { // // We check the transition condition continuously here in case // this G gets delayed in to the next GC cycle. - for trigger.test() && gosweepone() != ^uintptr(0) { + for trigger.test() && sweepone() != ^uintptr(0) { sweep.nbgsweep++ } diff --git a/src/runtime/mgcsweep.go b/src/runtime/mgcsweep.go index b7528ab68f..35b717ca9b 100644 --- a/src/runtime/mgcsweep.go +++ b/src/runtime/mgcsweep.go @@ -52,7 +52,7 @@ func bgsweep(c chan int) { goparkunlock(&sweep.lock, waitReasonGCSweepWait, traceEvGoBlock, 1) for { - for gosweepone() != ^uintptr(0) { + for sweepone() != ^uintptr(0) { sweep.nbgsweep++ Gosched() } @@ -72,9 +72,8 @@ func bgsweep(c chan int) { } } -// sweeps one span -// returns number of pages returned to heap, or ^uintptr(0) if there is nothing to sweep -//go:nowritebarrier +// sweepone sweeps one span and returns the number of pages returned +// to the heap, or ^uintptr(0) if there was nothing to sweep. func sweepone() uintptr { _g_ := getg() sweepRatio := mheap_.sweepPagesPerByte // For debugging @@ -135,15 +134,6 @@ func sweepone() uintptr { return npages } -//go:nowritebarrier -func gosweepone() uintptr { - var ret uintptr - systemstack(func() { - ret = sweepone() - }) - return ret -} - //go:nowritebarrier func gosweepdone() bool { return mheap_.sweepdone != 0 @@ -414,7 +404,7 @@ retry: newHeapLive := uintptr(atomic.Load64(&memstats.heap_live)-mheap_.sweepHeapLiveBasis) + spanBytes pagesTarget := int64(mheap_.sweepPagesPerByte*float64(newHeapLive)) - int64(callerSweepPages) for pagesTarget > int64(atomic.Load64(&mheap_.pagesSwept)-sweptBasis) { - if gosweepone() == ^uintptr(0) { + if sweepone() == ^uintptr(0) { mheap_.sweepPagesPerByte = 0 break } From 007e8a2fbda83e8863f7dda5632a100928318019 Mon Sep 17 00:00:00 2001 From: Austin Clements Date: Tue, 25 Sep 2018 17:41:11 -0400 Subject: [PATCH 063/240] runtime: rename gosweepdone to isSweepDone and document better gosweepdone is another anachronism from the time when the sweeper was implemented in C. Rename it to "isSweepDone" for the modern era. Change-Id: I8472aa6f52478459c3f2edc8a4b2761e73c4c2dd Reviewed-on: https://go-review.googlesource.com/c/138658 Run-TryBot: Austin Clements TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/runtime/mgc.go | 4 ++-- src/runtime/mgcsweep.go | 11 ++++++++--- 2 files changed, 10 insertions(+), 5 deletions(-) diff --git a/src/runtime/mgc.go b/src/runtime/mgc.go index 9a35c7671f..e12df7f7d2 100644 --- a/src/runtime/mgc.go +++ b/src/runtime/mgc.go @@ -789,7 +789,7 @@ func gcSetTriggerRatio(triggerRatio float64) { trigger = uint64(float64(memstats.heap_marked) * (1 + triggerRatio)) // Don't trigger below the minimum heap size. minTrigger := heapminimum - if !gosweepdone() { + if !isSweepDone() { // Concurrent sweep happens in the heap growth // from heap_live to gc_trigger, so ensure // that concurrent sweep has some heap growth @@ -834,7 +834,7 @@ func gcSetTriggerRatio(triggerRatio float64) { } // Update sweep pacing. - if gosweepdone() { + if isSweepDone() { mheap_.sweepPagesPerByte = 0 } else { // Concurrent sweep needs to sweep all of the in-use diff --git a/src/runtime/mgcsweep.go b/src/runtime/mgcsweep.go index 35b717ca9b..627a6a023f 100644 --- a/src/runtime/mgcsweep.go +++ b/src/runtime/mgcsweep.go @@ -60,7 +60,7 @@ func bgsweep(c chan int) { Gosched() } lock(&sweep.lock) - if !gosweepdone() { + if !isSweepDone() { // This can happen if a GC runs between // gosweepone returning ^0 above // and the lock being acquired. @@ -134,8 +134,13 @@ func sweepone() uintptr { return npages } -//go:nowritebarrier -func gosweepdone() bool { +// isSweepDone reports whether all spans are swept or currently being swept. +// +// Note that this condition may transition from false to true at any +// time as the sweeper runs. It may transition from true to false if a +// GC runs; to prevent that the caller must be non-preemptible or must +// somehow block GC progress. +func isSweepDone() bool { return mheap_.sweepdone != 0 } From d30d5a6b1e86e1bb62e159ffe8b8c698c04e945b Mon Sep 17 00:00:00 2001 From: Muhammad Falak R Wani Date: Sat, 6 Oct 2018 19:16:28 +0530 Subject: [PATCH 064/240] go/doc: skip examples with no body Fixes #28044 Change-Id: I0052e078dd34dc3546204416bcc5a99e3146c535 Reviewed-on: https://go-review.googlesource.com/c/140317 Run-TryBot: Dmitri Shuralyov TryBot-Result: Gobot Gobot Reviewed-by: Robert Griesemer --- src/go/doc/example.go | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/go/doc/example.go b/src/go/doc/example.go index 5b40bb0fb2..d6d4ece3a8 100644 --- a/src/go/doc/example.go +++ b/src/go/doc/example.go @@ -68,6 +68,9 @@ func Examples(files ...*ast.File) []*Example { if !isTest(name, "Example") { continue } + if f.Body == nil { // ast.File.Body nil dereference (see issue 28044) + continue + } var doc string if f.Doc != nil { doc = f.Doc.Text() From 48dc42b6afe7ad13102c55b8200c9f4577a88c84 Mon Sep 17 00:00:00 2001 From: Matthew Dempsky Date: Thu, 4 Oct 2018 16:49:53 -0700 Subject: [PATCH 065/240] cmd/compile/internal/gc: major evconst cleanup Major cleanup to structure the code more similarly to go/constant. Passes "toolstash -cmp" on std cmd. Change-Id: I3ec7a7a24e313f119b0da4095001aad02e317894 Reviewed-on: https://go-review.googlesource.com/c/139901 Run-TryBot: Matthew Dempsky TryBot-Result: Gobot Gobot Reviewed-by: Robert Griesemer --- src/cmd/compile/internal/gc/const.go | 867 ++++++++++----------------- 1 file changed, 310 insertions(+), 557 deletions(-) diff --git a/src/cmd/compile/internal/gc/const.go b/src/cmd/compile/internal/gc/const.go index effed1f4ac..e60e05df04 100644 --- a/src/cmd/compile/internal/gc/const.go +++ b/src/cmd/compile/internal/gc/const.go @@ -40,7 +40,7 @@ func (v Val) Ctype() Ctype { switch x := v.U.(type) { default: Fatalf("unexpected Ctype for %T", v.U) - panic("not reached") + panic("unreachable") case nil: return 0 case *NilVal: @@ -68,7 +68,7 @@ func eqval(a, b Val) bool { switch x := a.U.(type) { default: Fatalf("unexpected Ctype for %T", a.U) - panic("not reached") + panic("unreachable") case *NilVal: return true case bool: @@ -96,7 +96,7 @@ func (v Val) Interface() interface{} { switch x := v.U.(type) { default: Fatalf("unexpected Interface for %T", v.U) - panic("not reached") + panic("unreachable") case *NilVal: return nil case bool, string: @@ -424,29 +424,6 @@ bad: return n } -func copyval(v Val) Val { - switch u := v.U.(type) { - case *Mpint: - i := new(Mpint) - i.Set(u) - i.Rune = u.Rune - v.U = i - - case *Mpflt: - f := newMpflt() - f.Set(u) - v.U = f - - case *Mpcplx: - c := new(Mpcplx) - c.Real.Set(&u.Real) - c.Imag.Set(&u.Imag) - v.U = c - } - - return v -} - func tocplx(v Val) Val { switch u := v.U.(type) { case *Mpint: @@ -585,10 +562,6 @@ func tostr(v Val) Val { i = u.Int64() } v.U = string(i) - - case *NilVal: - // Can happen because of string([]byte(nil)). - v.U = "" } return v @@ -609,50 +582,55 @@ func Isconst(n *Node, ct Ctype) bool { return t == ct || (ct == CTINT && t == CTRUNE) } -// if n is constant, rewrite as OLITERAL node. +// evconst rewrites constant expressions into OLITERAL nodes. func evconst(n *Node) { - // pick off just the opcodes that can be - // constant evaluated. - switch n.Op { - default: - return + nl, nr := n.Left, n.Right - case OADD, - OAND, - OANDAND, - OANDNOT, - OARRAYBYTESTR, - OCOM, - ODIV, - OEQ, - OGE, - OGT, - OLE, - OLSH, - OLT, - OMINUS, - OMOD, - OMUL, - ONE, - ONOT, - OOR, - OOROR, - OPLUS, - ORSH, - OSUB, - OXOR: - break + // Pick off just the opcodes that can be constant evaluated. + switch op := n.Op; op { + case OPLUS, OMINUS, OCOM, ONOT: + if nl.Op == OLITERAL { + setconst(n, unaryOp(op, nl.Val(), n.Type)) + } + + case OADD, OSUB, OMUL, ODIV, OMOD, OOR, OXOR, OAND, OANDNOT, OOROR, OANDAND: + if nl.Op == OLITERAL && nr.Op == OLITERAL { + setconst(n, binaryOp(nl.Val(), op, nr.Val())) + } + + case OEQ, ONE, OLT, OLE, OGT, OGE: + if nl.Op == OLITERAL && nr.Op == OLITERAL { + if nl.Type.IsInterface() != nr.Type.IsInterface() { + // Mixed interface/non-interface + // constant comparison means comparing + // nil interface with some typed + // constant, which is always unequal. + // E.g., interface{}(nil) == (*int)(nil). + setboolconst(n, op == ONE) + } else { + setboolconst(n, compareOp(nl.Val(), op, nr.Val())) + } + } + + case OLSH, ORSH: + if nl.Op == OLITERAL && nr.Op == OLITERAL { + setconst(n, shiftOp(nl.Val(), op, nr.Val())) + } case OCONV: - if n.Type == nil { - return - } - if !okforconst[n.Type.Etype] && n.Type.Etype != TNIL { - return + if n.Type != nil && okforconst[n.Type.Etype] && nl.Op == OLITERAL { + // TODO(mdempsky): There should be a convval function. + setconst(n, convlit1(nl, n.Type, true, false).Val()) + } + + case OARRAYBYTESTR: + // string([]byte(nil)) or string([]rune(nil)) + if nl.Op == OLITERAL && nl.Val().Ctype() == CTNIL { + setconst(n, Val{U: ""}) } - // merge adjacent constants in the argument list. case OADDSTR: + // Merge adjacent constants in the argument list. s := n.List.Slice() for i1 := 0; i1 < len(s); i1++ { if Isconst(s[i1], CTSTR) && i1+1 < len(s) && Isconst(s[i1+1], CTSTR) { @@ -678,521 +656,292 @@ func evconst(n *Node) { } else { n.List.Set(s) } + } +} - return +func match(x, y Val) (Val, Val) { + switch { + case x.Ctype() == CTCPLX || y.Ctype() == CTCPLX: + return tocplx(x), tocplx(y) + case x.Ctype() == CTFLT || y.Ctype() == CTFLT: + return toflt(x), toflt(y) } - nl := n.Left - if nl == nil || nl.Type == nil { - return - } - if consttype(nl) == 0 { - return - } - wl := nl.Type.Etype - if isInt[wl] || isFloat[wl] || isComplex[wl] { - wl = TIDEAL - } + // Mixed int/rune are fine. + return x, y +} - // avoid constant conversions in switches below - const ( - CTINT_ = uint32(CTINT) - CTRUNE_ = uint32(CTRUNE) - CTFLT_ = uint32(CTFLT) - CTCPLX_ = uint32(CTCPLX) - CTSTR_ = uint32(CTSTR) - CTBOOL_ = uint32(CTBOOL) - CTNIL_ = uint32(CTNIL) - OCONV_ = uint32(OCONV) << 16 - OARRAYBYTESTR_ = uint32(OARRAYBYTESTR) << 16 - OPLUS_ = uint32(OPLUS) << 16 - OMINUS_ = uint32(OMINUS) << 16 - OCOM_ = uint32(OCOM) << 16 - ONOT_ = uint32(ONOT) << 16 - OLSH_ = uint32(OLSH) << 16 - ORSH_ = uint32(ORSH) << 16 - OADD_ = uint32(OADD) << 16 - OSUB_ = uint32(OSUB) << 16 - OMUL_ = uint32(OMUL) << 16 - ODIV_ = uint32(ODIV) << 16 - OMOD_ = uint32(OMOD) << 16 - OOR_ = uint32(OOR) << 16 - OAND_ = uint32(OAND) << 16 - OANDNOT_ = uint32(OANDNOT) << 16 - OXOR_ = uint32(OXOR) << 16 - OEQ_ = uint32(OEQ) << 16 - ONE_ = uint32(ONE) << 16 - OLT_ = uint32(OLT) << 16 - OLE_ = uint32(OLE) << 16 - OGE_ = uint32(OGE) << 16 - OGT_ = uint32(OGT) << 16 - OOROR_ = uint32(OOROR) << 16 - OANDAND_ = uint32(OANDAND) << 16 - ) +func compareOp(x Val, op Op, y Val) bool { + x, y = match(x, y) - nr := n.Right - var rv Val - var wr types.EType - var ctype uint32 - var v Val - if nr == nil { - // copy numeric value to avoid modifying - // nl, in case someone still refers to it (e.g. iota). - v = copyval(nl.Val()) - - // rune values are int values for the purpose of constant folding. - ctype = uint32(v.Ctype()) - if ctype == CTRUNE_ { - ctype = CTINT_ + switch x.Ctype() { + case CTNIL: + _, _ = x.U.(*NilVal), y.U.(*NilVal) // assert dynamic types match + switch op { + case OEQ: + return true + case ONE: + return false } - switch uint32(n.Op)<<16 | ctype { - default: - if !n.Diag() { - yyerror("illegal constant expression %v %v", n.Op, nl.Type) - n.SetDiag(true) - } - return + case CTBOOL: + x, y := x.U.(bool), y.U.(bool) + switch op { + case OEQ: + return x == y + case ONE: + return x != y + } - case OCONV_ | CTNIL_, - OARRAYBYTESTR_ | CTNIL_: - if n.Type.IsString() { - v = tostr(v) - nl.Type = n.Type + case CTINT, CTRUNE: + x, y := x.U.(*Mpint), y.U.(*Mpint) + return cmpZero(x.Cmp(y), op) + + case CTFLT: + x, y := x.U.(*Mpflt), y.U.(*Mpflt) + return cmpZero(x.Cmp(y), op) + + case CTCPLX: + x, y := x.U.(*Mpcplx), y.U.(*Mpcplx) + eq := x.Real.Cmp(&y.Real) == 0 && x.Imag.Cmp(&y.Imag) == 0 + switch op { + case OEQ: + return eq + case ONE: + return !eq + } + + case CTSTR: + x, y := x.U.(string), y.U.(string) + switch op { + case OEQ: + return x == y + case ONE: + return x != y + case OLT: + return x < y + case OLE: + return x <= y + case OGT: + return x > y + case OGE: + return x >= y + } + } + + Fatalf("compareOp: bad comparison: %v %v %v", x, op, y) + panic("unreachable") +} + +func cmpZero(x int, op Op) bool { + switch op { + case OEQ: + return x == 0 + case ONE: + return x != 0 + case OLT: + return x < 0 + case OLE: + return x <= 0 + case OGT: + return x > 0 + case OGE: + return x >= 0 + } + + Fatalf("cmpZero: want comparison operator, got %v", op) + panic("unreachable") +} + +func binaryOp(x Val, op Op, y Val) Val { + x, y = match(x, y) + +Outer: + switch x.Ctype() { + case CTBOOL: + x, y := x.U.(bool), y.U.(bool) + switch op { + case OANDAND: + return Val{U: x && y} + case OOROR: + return Val{U: x || y} + } + + case CTINT, CTRUNE: + x, y := x.U.(*Mpint), y.U.(*Mpint) + + u := new(Mpint) + u.Rune = x.Rune || y.Rune + u.Set(x) + switch op { + case OADD: + u.Add(y) + case OSUB: + u.Sub(y) + case OMUL: + u.Mul(y) + case ODIV: + if y.CmpInt64(0) == 0 { + yyerror("division by zero") + u.SetOverflow() break } - fallthrough - case OCONV_ | CTINT_, - OCONV_ | CTFLT_, - OCONV_ | CTCPLX_, - OCONV_ | CTSTR_, - OCONV_ | CTBOOL_: - nl = convlit1(nl, n.Type, true, false) - v = nl.Val() - - case OPLUS_ | CTINT_: - break - - case OMINUS_ | CTINT_: - v.U.(*Mpint).Neg() - - case OCOM_ | CTINT_: - et := Txxx - if nl.Type != nil { - et = nl.Type.Etype + u.Quo(y) + case OMOD: + if y.CmpInt64(0) == 0 { + yyerror("division by zero") + u.SetOverflow() + break } + u.Rem(y) + case OOR: + u.Or(y) + case OAND: + u.And(y) + case OANDNOT: + u.AndNot(y) + case OXOR: + u.Xor(y) + default: + break Outer + } + return Val{U: u} - // calculate the mask in b - // result will be (a ^ mask) - var b Mpint - switch et { - // signed guys change sign - default: - b.SetInt64(-1) + case CTFLT: + x, y := x.U.(*Mpflt), y.U.(*Mpflt) - // unsigned guys invert their bits - case TUINT8, - TUINT16, - TUINT32, - TUINT64, - TUINT, - TUINTPTR: - b.Set(maxintval[et]) + u := newMpflt() + u.Set(x) + switch op { + case OADD: + u.Add(y) + case OSUB: + u.Sub(y) + case OMUL: + u.Mul(y) + case ODIV: + if y.CmpFloat64(0) == 0 { + yyerror("division by zero") + u.SetFloat64(1) + break } - - v.U.(*Mpint).Xor(&b) - - case OPLUS_ | CTFLT_: - break - - case OMINUS_ | CTFLT_: - v.U.(*Mpflt).Neg() - - case OPLUS_ | CTCPLX_: - break - - case OMINUS_ | CTCPLX_: - v.U.(*Mpcplx).Real.Neg() - v.U.(*Mpcplx).Imag.Neg() - - case ONOT_ | CTBOOL_: - if !v.U.(bool) { - goto settrue - } - goto setfalse - } - goto ret - } - if nr.Type == nil { - return - } - if consttype(nr) == 0 { - return - } - wr = nr.Type.Etype - if isInt[wr] || isFloat[wr] || isComplex[wr] { - wr = TIDEAL - } - - // check for compatible general types (numeric, string, etc) - if wl != wr { - if wl == TINTER || wr == TINTER { - if n.Op == ONE { - goto settrue - } - goto setfalse - } - goto illegal - } - - // check for compatible types. - switch n.Op { - // ideal const mixes with anything but otherwise must match. - default: - if nl.Type.Etype != TIDEAL { - nr = defaultlit(nr, nl.Type) - n.Right = nr - } - - if nr.Type.Etype != TIDEAL { - nl = defaultlit(nl, nr.Type) - n.Left = nl - } - - if nl.Type.Etype != nr.Type.Etype { - goto illegal - } - - // right must be unsigned. - // left can be ideal. - case OLSH, ORSH: - nr = defaultlit(nr, types.Types[TUINT]) - - n.Right = nr - if nr.Type != nil && (nr.Type.IsSigned() || !nr.Type.IsInteger()) { - goto illegal - } - if nl.Val().Ctype() != CTRUNE { - nl.SetVal(toint(nl.Val())) - } - nr.SetVal(toint(nr.Val())) - } - - // copy numeric value to avoid modifying - // n->left, in case someone still refers to it (e.g. iota). - v = copyval(nl.Val()) - rv = nr.Val() - - // convert to common ideal - if v.Ctype() == CTCPLX || rv.Ctype() == CTCPLX { - v = tocplx(v) - rv = tocplx(rv) - } - - if v.Ctype() == CTFLT || rv.Ctype() == CTFLT { - v = toflt(v) - rv = toflt(rv) - } - - // Rune and int turns into rune. - if v.Ctype() == CTRUNE && rv.Ctype() == CTINT { - i := new(Mpint) - i.Set(rv.U.(*Mpint)) - i.Rune = true - rv.U = i - } - if v.Ctype() == CTINT && rv.Ctype() == CTRUNE { - if n.Op == OLSH || n.Op == ORSH { - i := new(Mpint) - i.Set(rv.U.(*Mpint)) - rv.U = i - } else { - i := new(Mpint) - i.Set(v.U.(*Mpint)) - i.Rune = true - v.U = i - } - } - - if v.Ctype() != rv.Ctype() { - // Use of undefined name as constant? - if (v.Ctype() == 0 || rv.Ctype() == 0) && nerrors > 0 { - return - } - Fatalf("constant type mismatch %v(%d) %v(%d)", nl.Type, v.Ctype(), nr.Type, rv.Ctype()) - } - - // rune values are int values for the purpose of constant folding. - ctype = uint32(v.Ctype()) - if ctype == CTRUNE_ { - ctype = CTINT_ - } - - // run op - switch uint32(n.Op)<<16 | ctype { - default: - goto illegal - - case OADD_ | CTINT_: - v.U.(*Mpint).Add(rv.U.(*Mpint)) - - case OSUB_ | CTINT_: - v.U.(*Mpint).Sub(rv.U.(*Mpint)) - - case OMUL_ | CTINT_: - v.U.(*Mpint).Mul(rv.U.(*Mpint)) - - case ODIV_ | CTINT_: - if rv.U.(*Mpint).CmpInt64(0) == 0 { - yyerror("division by zero") - v.U.(*Mpint).SetOverflow() - break - } - - v.U.(*Mpint).Quo(rv.U.(*Mpint)) - - case OMOD_ | CTINT_: - if rv.U.(*Mpint).CmpInt64(0) == 0 { - yyerror("division by zero") - v.U.(*Mpint).SetOverflow() - break - } - - v.U.(*Mpint).Rem(rv.U.(*Mpint)) - - case OLSH_ | CTINT_: - v.U.(*Mpint).Lsh(rv.U.(*Mpint)) - - case ORSH_ | CTINT_: - v.U.(*Mpint).Rsh(rv.U.(*Mpint)) - - case OOR_ | CTINT_: - v.U.(*Mpint).Or(rv.U.(*Mpint)) - - case OAND_ | CTINT_: - v.U.(*Mpint).And(rv.U.(*Mpint)) - - case OANDNOT_ | CTINT_: - v.U.(*Mpint).AndNot(rv.U.(*Mpint)) - - case OXOR_ | CTINT_: - v.U.(*Mpint).Xor(rv.U.(*Mpint)) - - case OADD_ | CTFLT_: - v.U.(*Mpflt).Add(rv.U.(*Mpflt)) - - case OSUB_ | CTFLT_: - v.U.(*Mpflt).Sub(rv.U.(*Mpflt)) - - case OMUL_ | CTFLT_: - v.U.(*Mpflt).Mul(rv.U.(*Mpflt)) - - case ODIV_ | CTFLT_: - if rv.U.(*Mpflt).CmpFloat64(0) == 0 { - yyerror("division by zero") - v.U.(*Mpflt).SetFloat64(1.0) - break - } - - v.U.(*Mpflt).Quo(rv.U.(*Mpflt)) - - // The default case above would print 'ideal % ideal', - // which is not quite an ideal error. - case OMOD_ | CTFLT_: - if !n.Diag() { + u.Quo(y) + case OMOD: + // TODO(mdempsky): Move to typecheck. yyerror("illegal constant expression: floating-point %% operation") - n.SetDiag(true) + default: + break Outer } + return Val{U: u} - return + case CTCPLX: + x, y := x.U.(*Mpcplx), y.U.(*Mpcplx) - case OADD_ | CTCPLX_: - v.U.(*Mpcplx).Real.Add(&rv.U.(*Mpcplx).Real) - v.U.(*Mpcplx).Imag.Add(&rv.U.(*Mpcplx).Imag) - - case OSUB_ | CTCPLX_: - v.U.(*Mpcplx).Real.Sub(&rv.U.(*Mpcplx).Real) - v.U.(*Mpcplx).Imag.Sub(&rv.U.(*Mpcplx).Imag) - - case OMUL_ | CTCPLX_: - v.U.(*Mpcplx).Mul(rv.U.(*Mpcplx)) - - case ODIV_ | CTCPLX_: - if !v.U.(*Mpcplx).Div(rv.U.(*Mpcplx)) { - yyerror("complex division by zero") - rv.U.(*Mpcplx).Real.SetFloat64(1.0) - rv.U.(*Mpcplx).Imag.SetFloat64(0.0) - break + u := new(Mpcplx) + u.Real.Set(&x.Real) + u.Imag.Set(&x.Imag) + switch op { + case OADD: + u.Real.Add(&y.Real) + u.Imag.Add(&y.Imag) + case OSUB: + u.Real.Sub(&y.Real) + u.Imag.Sub(&y.Imag) + case OMUL: + u.Mul(y) + case ODIV: + if !u.Div(y) { + yyerror("complex division by zero") + u.Real.SetFloat64(1) + u.Imag.SetFloat64(0) + } + default: + break Outer } - - case OEQ_ | CTNIL_: - goto settrue - - case ONE_ | CTNIL_: - goto setfalse - - case OEQ_ | CTINT_: - if v.U.(*Mpint).Cmp(rv.U.(*Mpint)) == 0 { - goto settrue - } - goto setfalse - - case ONE_ | CTINT_: - if v.U.(*Mpint).Cmp(rv.U.(*Mpint)) != 0 { - goto settrue - } - goto setfalse - - case OLT_ | CTINT_: - if v.U.(*Mpint).Cmp(rv.U.(*Mpint)) < 0 { - goto settrue - } - goto setfalse - - case OLE_ | CTINT_: - if v.U.(*Mpint).Cmp(rv.U.(*Mpint)) <= 0 { - goto settrue - } - goto setfalse - - case OGE_ | CTINT_: - if v.U.(*Mpint).Cmp(rv.U.(*Mpint)) >= 0 { - goto settrue - } - goto setfalse - - case OGT_ | CTINT_: - if v.U.(*Mpint).Cmp(rv.U.(*Mpint)) > 0 { - goto settrue - } - goto setfalse - - case OEQ_ | CTFLT_: - if v.U.(*Mpflt).Cmp(rv.U.(*Mpflt)) == 0 { - goto settrue - } - goto setfalse - - case ONE_ | CTFLT_: - if v.U.(*Mpflt).Cmp(rv.U.(*Mpflt)) != 0 { - goto settrue - } - goto setfalse - - case OLT_ | CTFLT_: - if v.U.(*Mpflt).Cmp(rv.U.(*Mpflt)) < 0 { - goto settrue - } - goto setfalse - - case OLE_ | CTFLT_: - if v.U.(*Mpflt).Cmp(rv.U.(*Mpflt)) <= 0 { - goto settrue - } - goto setfalse - - case OGE_ | CTFLT_: - if v.U.(*Mpflt).Cmp(rv.U.(*Mpflt)) >= 0 { - goto settrue - } - goto setfalse - - case OGT_ | CTFLT_: - if v.U.(*Mpflt).Cmp(rv.U.(*Mpflt)) > 0 { - goto settrue - } - goto setfalse - - case OEQ_ | CTCPLX_: - if v.U.(*Mpcplx).Real.Cmp(&rv.U.(*Mpcplx).Real) == 0 && v.U.(*Mpcplx).Imag.Cmp(&rv.U.(*Mpcplx).Imag) == 0 { - goto settrue - } - goto setfalse - - case ONE_ | CTCPLX_: - if v.U.(*Mpcplx).Real.Cmp(&rv.U.(*Mpcplx).Real) != 0 || v.U.(*Mpcplx).Imag.Cmp(&rv.U.(*Mpcplx).Imag) != 0 { - goto settrue - } - goto setfalse - - case OEQ_ | CTSTR_: - if strlit(nl) == strlit(nr) { - goto settrue - } - goto setfalse - - case ONE_ | CTSTR_: - if strlit(nl) != strlit(nr) { - goto settrue - } - goto setfalse - - case OLT_ | CTSTR_: - if strlit(nl) < strlit(nr) { - goto settrue - } - goto setfalse - - case OLE_ | CTSTR_: - if strlit(nl) <= strlit(nr) { - goto settrue - } - goto setfalse - - case OGE_ | CTSTR_: - if strlit(nl) >= strlit(nr) { - goto settrue - } - goto setfalse - - case OGT_ | CTSTR_: - if strlit(nl) > strlit(nr) { - goto settrue - } - goto setfalse - - case OOROR_ | CTBOOL_: - if v.U.(bool) || rv.U.(bool) { - goto settrue - } - goto setfalse - - case OANDAND_ | CTBOOL_: - if v.U.(bool) && rv.U.(bool) { - goto settrue - } - goto setfalse - - case OEQ_ | CTBOOL_: - if v.U.(bool) == rv.U.(bool) { - goto settrue - } - goto setfalse - - case ONE_ | CTBOOL_: - if v.U.(bool) != rv.U.(bool) { - goto settrue - } - goto setfalse + return Val{U: u} } -ret: - setconst(n, v) - return + Fatalf("binaryOp: bad operation: %v %v %v", x, op, y) + panic("unreachable") +} -settrue: - setconst(n, Val{true}) - return +func unaryOp(op Op, x Val, t *types.Type) Val { + switch op { + case OPLUS: + switch x.Ctype() { + case CTINT, CTRUNE, CTFLT, CTCPLX: + return x + } -setfalse: - setconst(n, Val{false}) - return + case OMINUS: + switch x.Ctype() { + case CTINT, CTRUNE: + x := x.U.(*Mpint) + u := new(Mpint) + u.Rune = x.Rune + u.Set(x) + u.Neg() + return Val{U: u} -illegal: - if !n.Diag() { - yyerror("illegal constant expression: %v %v %v", nl.Type, n.Op, nr.Type) - n.SetDiag(true) + case CTFLT: + x := x.U.(*Mpflt) + u := newMpflt() + u.Set(x) + u.Neg() + return Val{U: u} + + case CTCPLX: + x := x.U.(*Mpcplx) + u := new(Mpcplx) + u.Real.Set(&x.Real) + u.Imag.Set(&x.Imag) + u.Real.Neg() + u.Imag.Neg() + return Val{U: u} + } + + case OCOM: + x := x.U.(*Mpint) + + u := new(Mpint) + u.Rune = x.Rune + if t.IsSigned() || t.IsUntyped() { + // Signed values change sign. + u.SetInt64(-1) + } else { + // Unsigned values invert their bits. + u.Set(maxintval[t.Etype]) + } + u.Xor(x) + return Val{U: u} + + case ONOT: + return Val{U: !x.U.(bool)} } + + Fatalf("unaryOp: bad operation: %v %v", op, x) + panic("unreachable") +} + +func shiftOp(x Val, op Op, y Val) Val { + if x.Ctype() != CTRUNE { + x = toint(x) + } + y = toint(y) + + u := new(Mpint) + u.Set(x.U.(*Mpint)) + u.Rune = x.U.(*Mpint).Rune + switch op { + case OLSH: + u.Lsh(y.U.(*Mpint)) + case ORSH: + u.Rsh(y.U.(*Mpint)) + default: + Fatalf("shiftOp: bad operator: %v", op) + panic("unreachable") + } + return Val{U: u} } // setconst rewrites n as an OLITERAL with value v. @@ -1223,6 +972,10 @@ func setconst(n *Node, v Val) { } } +func setboolconst(n *Node, v bool) { + setconst(n, Val{U: v}) +} + func setintconst(n *Node, v int64) { u := new(Mpint) u.SetInt64(v) From 6c85693bf14e246e5a53466048329cb7571a674c Mon Sep 17 00:00:00 2001 From: "Bryan C. Mills" Date: Tue, 9 Oct 2018 09:50:56 -0400 Subject: [PATCH 066/240] cmd/go: check that package paths are invariantly non-empty MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The empty string is never a valid package path. Passing an empty string to a function that expects a package path indicates some missing validation step further up the call chain — typically (and most easily) a missed error check. Change-Id: I78a2403d95b473bacb0d40814cd9d477ecfd5351 Reviewed-on: https://go-review.googlesource.com/c/140857 Run-TryBot: Bryan C. Mills TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/cmd/go/internal/load/pkg.go | 10 ++++++++++ src/cmd/go/internal/modload/build.go | 3 +++ src/cmd/go/internal/modload/load.go | 3 +++ 3 files changed, 16 insertions(+) diff --git a/src/cmd/go/internal/load/pkg.go b/src/cmd/go/internal/load/pkg.go index ec2fa730c6..3d1b0e649d 100644 --- a/src/cmd/go/internal/load/pkg.go +++ b/src/cmd/go/internal/load/pkg.go @@ -440,6 +440,10 @@ const ( // this package, as part of a bigger load operation, and by GOPATH-based "go get". // TODO(rsc): When GOPATH-based "go get" is removed, unexport this function. func LoadImport(path, srcDir string, parent *Package, stk *ImportStack, importPos []token.Position, mode int) *Package { + if path == "" { + panic("LoadImport called with empty package path") + } + stk.Push(path) defer stk.Pop() @@ -1750,6 +1754,9 @@ func LoadPackageNoFlags(arg string, stk *ImportStack) *Package { // loadPackage accepts pseudo-paths beginning with cmd/ to denote commands // in the Go command directory, as well as paths to those directories. func loadPackage(arg string, stk *ImportStack) *Package { + if arg == "" { + panic("loadPackage called with empty package path") + } if build.IsLocalImport(arg) { dir := arg if !filepath.IsAbs(dir) { @@ -1848,6 +1855,9 @@ func PackagesAndErrors(patterns []string) []*Package { for _, m := range matches { for _, pkg := range m.Pkgs { + if pkg == "" { + panic(fmt.Sprintf("ImportPaths returned empty package for pattern %s", m.Pattern)) + } p := loadPackage(pkg, &stk) p.Match = append(p.Match, m.Pattern) p.Internal.CmdlinePkg = true diff --git a/src/cmd/go/internal/modload/build.go b/src/cmd/go/internal/modload/build.go index acee4a91e7..4e7741c5fb 100644 --- a/src/cmd/go/internal/modload/build.go +++ b/src/cmd/go/internal/modload/build.go @@ -30,6 +30,9 @@ func isStandardImportPath(path string) bool { } func findStandardImportPath(path string) string { + if path == "" { + panic("findStandardImportPath called with empty path") + } if search.IsStandardImportPath(path) { if goroot.IsStandardPackage(cfg.GOROOT, cfg.BuildContext.Compiler, path) { return filepath.Join(cfg.GOROOT, "src", path) diff --git a/src/cmd/go/internal/modload/load.go b/src/cmd/go/internal/modload/load.go index 6c1525da9a..3b8c0b6435 100644 --- a/src/cmd/go/internal/modload/load.go +++ b/src/cmd/go/internal/modload/load.go @@ -397,6 +397,9 @@ func ModuleUsedDirectly(path string) bool { // Lookup requires that one of the Load functions in this package has already // been called. func Lookup(path string) (dir, realPath string, err error) { + if path == "" { + panic("Lookup called with empty package path") + } pkg, ok := loaded.pkgCache.Get(path).(*loadPkg) if !ok { // The loader should have found all the relevant paths. From 45e668879d763dd6b312034c98f8c5ffa7228ce6 Mon Sep 17 00:00:00 2001 From: "Bryan C. Mills" Date: Tue, 9 Oct 2018 10:21:53 -0400 Subject: [PATCH 067/240] cmd/go: remove extraneous 'file' from usage message in script_test MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Previously, erroneous usage would produce error messages like: FAIL: testdata/script/mod_tidy_replace.txt:4: usage: stdout [-count=N] 'pattern' file where the “file” argument is not actually valid for the stdout command. Change-Id: I74100960f4d25da122faa6c82620995a3fbfc75f Reviewed-on: https://go-review.googlesource.com/c/140858 Run-TryBot: Bryan C. Mills TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/cmd/go/script_test.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/cmd/go/script_test.go b/src/cmd/go/script_test.go index 31c6ede2a5..8708dacd41 100644 --- a/src/cmd/go/script_test.go +++ b/src/cmd/go/script_test.go @@ -614,7 +614,7 @@ func scriptMatch(ts *testScript, neg bool, args []string, text, name string) { want = 2 } if len(args) != want { - ts.fatalf("usage: %s [-count=N] 'pattern' file%s", name, extraUsage) + ts.fatalf("usage: %s [-count=N] 'pattern'%s", name, extraUsage) } pattern := args[0] From dc2ae2886fbcd2297d2a0ea67a5d220ae2c74152 Mon Sep 17 00:00:00 2001 From: Muhammad Falak R Wani Date: Tue, 9 Oct 2018 22:12:40 +0530 Subject: [PATCH 068/240] runtime/cgo: annotate unused variable with __attribute__((unused)) Fixes #28095 Change-Id: Id8668d52986c9805213e8847f49fe42dfde2e01a Reviewed-on: https://go-review.googlesource.com/c/140797 Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/runtime/cgo/gcc_libinit.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/runtime/cgo/gcc_libinit.c b/src/runtime/cgo/gcc_libinit.c index 3dc5bde4cc..3dafd10b7b 100644 --- a/src/runtime/cgo/gcc_libinit.c +++ b/src/runtime/cgo/gcc_libinit.c @@ -63,7 +63,7 @@ _cgo_wait_runtime_init_done() { } void -x_cgo_notify_runtime_init_done(void* dummy) { +x_cgo_notify_runtime_init_done(void* dummy __attribute__ ((unused))) { pthread_mutex_lock(&runtime_init_mu); runtime_init_done = 1; pthread_cond_broadcast(&runtime_init_cond); From 49be65eeba37a3d29a8a33379794e7a84df6cca1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= Date: Fri, 28 Sep 2018 15:24:32 +0200 Subject: [PATCH 069/240] syscall: change solaris files to libc files AIX and Solaris both requires libc to make any syscalls and their implementation is really similar. Therefore, Solaris files reused by AIX have their name changed to *_libc. exec_libc.go is also adapted to AIX. Updates: #25893 Change-Id: I50d1d7b964831637013d5e64799187cd9565c42b Reviewed-on: https://go-review.googlesource.com/c/138719 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/runtime/syscall_solaris.go | 7 +++ src/syscall/asm_solaris_amd64.s | 4 ++ src/syscall/{exec_solaris.go => exec_libc.go} | 23 +++++++-- src/syscall/exec_unix.go | 12 ++--- src/syscall/mkall.sh | 13 ++++- ...mksyscall_solaris.pl => mksyscall_libc.pl} | 50 ++++++++++++++++--- 6 files changed, 89 insertions(+), 20 deletions(-) rename src/syscall/{exec_solaris.go => exec_libc.go} (92%) rename src/syscall/{mksyscall_solaris.pl => mksyscall_libc.pl} (89%) diff --git a/src/runtime/syscall_solaris.go b/src/runtime/syscall_solaris.go index 9f05a47892..94e018d479 100644 --- a/src/runtime/syscall_solaris.go +++ b/src/runtime/syscall_solaris.go @@ -83,6 +83,13 @@ func syscall_close(fd int32) int32 { return int32(sysvicall1(&libc_close, uintptr(fd))) } +const _F_DUP2FD = 0x9 + +//go:nosplit +func syscall_dup2(oldfd, newfd uintptr) (val, err uintptr) { + return syscall_fcntl(oldfd, _F_DUP2FD, newfd) +} + //go:nosplit func syscall_execve(path, argv, envp uintptr) (err uintptr) { call := libcall{ diff --git a/src/syscall/asm_solaris_amd64.s b/src/syscall/asm_solaris_amd64.s index 6fa041866d..c61e04a42f 100644 --- a/src/syscall/asm_solaris_amd64.s +++ b/src/syscall/asm_solaris_amd64.s @@ -23,6 +23,10 @@ TEXT ·chroot1(SB),NOSPLIT,$0 TEXT ·close(SB),NOSPLIT,$0 JMP runtime·syscall_close(SB) +TEXT ·dup2child(SB),NOSPLIT,$0 + JMP runtime·syscall_dup2(SB) + RET + TEXT ·execve(SB),NOSPLIT,$0 JMP runtime·syscall_execve(SB) diff --git a/src/syscall/exec_solaris.go b/src/syscall/exec_libc.go similarity index 92% rename from src/syscall/exec_solaris.go rename to src/syscall/exec_libc.go index 9735ae5706..d6d34c04c3 100644 --- a/src/syscall/exec_solaris.go +++ b/src/syscall/exec_libc.go @@ -2,6 +2,10 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. +// +build aix solaris + +// This file handles forkAndExecInChild function for OS using libc syscall like AIX or Solaris. + package syscall import ( @@ -28,6 +32,7 @@ func runtime_AfterForkInChild() func chdir(path uintptr) (err Errno) func chroot1(path uintptr) (err Errno) func close(fd uintptr) (err Errno) +func dup2child(old uintptr, new uintptr) (val uintptr, err Errno) func execve(path uintptr, argv uintptr, envp uintptr) (err Errno) func exit(code uintptr) func fcntl1(fd uintptr, cmd uintptr, arg uintptr) (val uintptr, err Errno) @@ -43,7 +48,7 @@ func write1(fd uintptr, buf uintptr, nbyte uintptr) (n uintptr, err Errno) // syscall defines this global on our behalf to avoid a build dependency on other platforms func init() { - execveSolaris = execve + execveLibc = execve } // Fork, dup fd onto 0..len(fd), and exec(argv0, argvv, envv) in child. @@ -178,7 +183,7 @@ func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr // Pass 1: look for fd[i] < i and move those up above len(fd) // so that pass 2 won't stomp on an fd it needs later. if pipe < nextfd { - _, err1 = fcntl1(uintptr(pipe), F_DUP2FD, uintptr(nextfd)) + _, err1 = dup2child(uintptr(pipe), uintptr(nextfd)) if err1 != 0 { goto childerror } @@ -191,11 +196,14 @@ func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr if nextfd == pipe { // don't stomp on pipe nextfd++ } - _, err1 = fcntl1(uintptr(fd[i]), F_DUP2FD, uintptr(nextfd)) + _, err1 = dup2child(uintptr(fd[i]), uintptr(nextfd)) + if err1 != 0 { + goto childerror + } + _, err1 = fcntl1(uintptr(nextfd), F_SETFD, FD_CLOEXEC) if err1 != 0 { goto childerror } - fcntl1(uintptr(nextfd), F_SETFD, FD_CLOEXEC) fd[i] = nextfd nextfd++ } @@ -218,7 +226,7 @@ func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr } // The new fd is created NOT close-on-exec, // which is exactly what we want. - _, err1 = fcntl1(uintptr(fd[i]), F_DUP2FD, uintptr(i)) + _, err1 = dup2child(uintptr(fd[i]), uintptr(i)) if err1 != 0 { goto childerror } @@ -242,6 +250,11 @@ func forkAndExecInChild(argv0 *byte, argv, envv []*byte, chroot, dir *byte, attr // Set the controlling TTY to Ctty if sys.Setctty { + // On AIX, TIOCSCTTY is undefined + if TIOCSCTTY == 0 { + err1 = ENOSYS + goto childerror + } err1 = ioctl(uintptr(sys.Ctty), uintptr(TIOCSCTTY), 0) if err1 != 0 { goto childerror diff --git a/src/syscall/exec_unix.go b/src/syscall/exec_unix.go index 9a950ac17f..3b84256b8e 100644 --- a/src/syscall/exec_unix.go +++ b/src/syscall/exec_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris // Fork, exec, wait, etc. @@ -246,9 +246,9 @@ func StartProcess(argv0 string, argv []string, attr *ProcAttr) (pid int, handle func runtime_BeforeExec() func runtime_AfterExec() -// execveSolaris is non-nil on Solaris, set to execve in exec_solaris.go; this +// execveLibc is non-nil on OS using libc syscall, set to execve in exec_libc.go; this // avoids a build dependency for other platforms. -var execveSolaris func(path uintptr, argv uintptr, envp uintptr) (err Errno) +var execveLibc func(path uintptr, argv uintptr, envp uintptr) (err Errno) // Exec invokes the execve(2) system call. func Exec(argv0 string, argv []string, envv []string) (err error) { @@ -267,9 +267,9 @@ func Exec(argv0 string, argv []string, envv []string) (err error) { runtime_BeforeExec() var err1 Errno - if runtime.GOOS == "solaris" { - // RawSyscall should never be used on Solaris. - err1 = execveSolaris( + if runtime.GOOS == "solaris" || runtime.GOOS == "aix" { + // RawSyscall should never be used on Solaris or AIX. + err1 = execveLibc( uintptr(unsafe.Pointer(argv0p)), uintptr(unsafe.Pointer(&argvp[0])), uintptr(unsafe.Pointer(&envvp[0]))) diff --git a/src/syscall/mkall.sh b/src/syscall/mkall.sh index b381b93161..b783921d1a 100755 --- a/src/syscall/mkall.sh +++ b/src/syscall/mkall.sh @@ -115,6 +115,11 @@ _* | *_ | _) echo 'undefined $GOOS_$GOARCH:' "$GOOSARCH" 1>&2 exit 1 ;; +aix_ppc64) + mkerrors="$mkerrors -maix64" + mksyscall="./mksyscall_libc.pl -aix" + mktypes="GOARCH=$GOARCH go tool cgo -godefs" + ;; darwin_386) mkerrors="$mkerrors -m32" mksyscall="./mksyscall.pl -l32" @@ -301,7 +306,7 @@ plan9_386) mktypes="XXX" ;; solaris_amd64) - mksyscall="./mksyscall_solaris.pl" + mksyscall="./mksyscall_libc.pl -solaris" mkerrors="$mkerrors -m64" mksysnum= mktypes="GOARCH=$GOARCH go tool cgo -godefs" @@ -327,5 +332,9 @@ esac if [ -n "$mksyscall" ]; then echo "$mksyscall -tags $GOOS,$GOARCH $syscall_goos $GOOSARCH_in |gofmt >zsyscall_$GOOSARCH.go"; fi if [ -n "$mksysctl" ]; then echo "$mksysctl |gofmt >$zsysctl"; fi if [ -n "$mksysnum" ]; then echo "$mksysnum |gofmt >zsysnum_$GOOSARCH.go"; fi - if [ -n "$mktypes" ]; then echo "$mktypes types_$GOOS.go |go run mkpost.go >ztypes_$GOOSARCH.go"; fi + if [ -n "$mktypes" ]; then + # ztypes_$GOOSARCH.go could be erased before "go run mkpost.go" is called. + # Therefore, "go run" tries to recompile syscall package but ztypes is empty and it fails. + echo "$mktypes types_$GOOS.go |go run mkpost.go >ztypes_$GOOSARCH.go.NEW && mv ztypes_$GOOSARCH.go.NEW ztypes_$GOOSARCH.go"; + fi ) | $run diff --git a/src/syscall/mksyscall_solaris.pl b/src/syscall/mksyscall_libc.pl similarity index 89% rename from src/syscall/mksyscall_solaris.pl rename to src/syscall/mksyscall_libc.pl index 9172975914..6f57bee79e 100755 --- a/src/syscall/mksyscall_solaris.pl +++ b/src/syscall/mksyscall_libc.pl @@ -19,10 +19,12 @@ use strict; -my $cmdline = "mksyscall_solaris.pl " . join(' ', @ARGV); +my $cmdline = "mksyscall_libc.pl " . join(' ', @ARGV); my $errors = 0; my $_32bit = ""; my $tags = ""; # build tags +my $aix = 0; +my $solaris = 0; binmode STDOUT; @@ -33,14 +35,23 @@ if($ARGV[0] eq "-b32") { $_32bit = "little-endian"; shift; } +if($ARGV[0] eq "-aix") { + $aix = 1; + shift; +} +if($ARGV[0] eq "-solaris") { + $solaris = 1; + shift; +} if($ARGV[0] eq "-tags") { shift; $tags = $ARGV[0]; shift; } + if($ARGV[0] =~ /^-/) { - print STDERR "usage: mksyscall_solaris.pl [-b32 | -l32] [-tags x,y] [file ...]\n"; + print STDERR "usage: mksyscall_libc.pl [-b32 | -l32] [-aix | -solaris] [-tags x,y] [file ...]\n"; exit 1; } @@ -96,8 +107,22 @@ while(<>) { my @out = parseparamlist($out); # So file name. - if($modname eq "") { - $modname = "libc"; + if($aix) { + if($modname eq "") { + $modname = "libc.a/shr_64.o"; + } else { + print STDERR "$func: only syscall using libc are available\n"; + $errors = 1; + next; + } + + } + if($solaris) { + if($modname eq "") { + $modname = "libc"; + } + $modname .= ".so"; + } # System call name. @@ -114,7 +139,7 @@ while(<>) { $sysname =~ y/A-Z/a-z/; # All libc functions are lowercase. # Runtime import of function to allow cross-platform builds. - $dynimports .= "//go:cgo_import_dynamic ${sysvarname} ${sysname} \"$modname.so\"\n"; + $dynimports .= "//go:cgo_import_dynamic ${sysvarname} ${sysname} \"$modname\"\n"; # Link symbol to proc address variable. $linknames .= "//go:linkname ${sysvarname} ${sysvarname}\n"; # Library proc address variable. @@ -184,10 +209,21 @@ while(<>) { } my $nargs = @args; + my $asmfuncname=""; + my $asmrawfuncname=""; + + if($aix){ + $asmfuncname="syscall6"; + $asmrawfuncname="rawSyscall6"; + } else { + $asmfuncname="sysvicall6"; + $asmrawfuncname="rawSysvicall6"; + } + # Determine which form to use; pad args with zeros. - my $asm = "${syscalldot}sysvicall6"; + my $asm = "${syscalldot}${asmfuncname}"; if ($nonblock) { - $asm = "${syscalldot}rawSysvicall6"; + $asm = "${syscalldot}${asmrawfuncname}"; } if(@args <= 6) { while(@args < 6) { From 95d06ab6c982f58b127b14a52c3325acf0bd3926 Mon Sep 17 00:00:00 2001 From: Wil Selwood Date: Thu, 2 Aug 2018 20:29:38 +0100 Subject: [PATCH 070/240] testing: try to Log through parent if test has completed If the test has already completed when a go routine with a panic handler reports an error the location of the error call is lost. Added logDepth to be able to log location of failure at different depths down the stack. Fixes #26720 Change-Id: I8b7789ddae757ef6f4bd315cb20356709f4fadec Reviewed-on: https://go-review.googlesource.com/c/127596 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/testing/sub_test.go | 23 +++++++++++++++++++++++ src/testing/testing.go | 22 +++++++++++++++++++--- 2 files changed, 42 insertions(+), 3 deletions(-) diff --git a/src/testing/sub_test.go b/src/testing/sub_test.go index 29803c06e2..e9b2233520 100644 --- a/src/testing/sub_test.go +++ b/src/testing/sub_test.go @@ -411,6 +411,29 @@ func TestTRun(t *T) { ch <- true <-ch }, + }, { + desc: "log in finished sub test logs to parent", + ok: false, + output: ` + --- FAIL: log in finished sub test logs to parent (N.NNs) + sub_test.go:NNN: message2 + sub_test.go:NNN: message1 + sub_test.go:NNN: error`, + maxPar: 1, + f: func(t *T) { + ch := make(chan bool) + t.Run("sub", func(t2 *T) { + go func() { + <-ch + t2.Log("message1") + ch <- true + }() + }) + t.Log("message2") + ch <- true + <-ch + t.Errorf("error") + }, }} for _, tc := range testCases { ctx := newTestContext(tc.maxPar, newMatcher(regexp.MatchString, "", "")) diff --git a/src/testing/testing.go b/src/testing/testing.go index 179987b699..0bc222c0bb 100644 --- a/src/testing/testing.go +++ b/src/testing/testing.go @@ -403,8 +403,8 @@ func (c *common) frameSkip(skip int) runtime.Frame { // decorate prefixes the string with the file and line of the call site // and inserts the final newline if needed and indentation spaces for formatting. // This function must be called with c.mu held. -func (c *common) decorate(s string) string { - frame := c.frameSkip(3) // decorate + log + public function. +func (c *common) decorate(s string, skip int) string { + frame := c.frameSkip(skip) file := frame.File line := frame.Line if file != "" { @@ -599,9 +599,25 @@ func (c *common) FailNow() { // log generates the output. It's always at the same stack depth. func (c *common) log(s string) { + c.logDepth(s, 3) // logDepth + log + public function +} + +// logDepth generates the output. At an arbitary stack depth +func (c *common) logDepth(s string, depth int) { c.mu.Lock() defer c.mu.Unlock() - c.output = append(c.output, c.decorate(s)...) + // If this test has already finished try and log this message with our parent + // with this test name tagged so we know where it came from. + // If we don't have a parent panic. + if c.done { + if c.parent != nil { + c.parent.logDepth(s, depth+1) + } else { + panic("Log in goroutine after " + c.name + " has completed") + } + } else { + c.output = append(c.output, c.decorate(s, depth+1)...) + } } // Log formats its arguments using default formatting, analogous to Println, From c870d56f98eab5370726afd223fe0ab14d9e88ab Mon Sep 17 00:00:00 2001 From: Brad Fitzpatrick Date: Tue, 9 Oct 2018 16:01:20 -0700 Subject: [PATCH 071/240] net/http/httputil: fix race/crash in previous ReverseProxy change The previous ReverseProxy change, CL 137335, introduced a bug which could cause a race and/or a crash. This reliably crashed before: $ go test -short -race -v -run=TestReverseProxyFlushInterval -count=20 net/http/httputil The problem was a goroutine was running http.ResponseWriter.Flush after the http.Handler's ServeHTTP completed. There was code to prevent that (a deferred stop call) but the stop call didn't consider the case where time.AfterFunc had already fired off a new goroutine but that goroutine hadn't yet scheduled. Change-Id: I06357908465a3b953efc33e63c70dec19a501adf Reviewed-on: https://go-review.googlesource.com/c/140977 Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot Reviewed-by: Dmitri Shuralyov --- src/net/http/httputil/reverseproxy.go | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/net/http/httputil/reverseproxy.go b/src/net/http/httputil/reverseproxy.go index 1efcbd3bbc..f82d820a43 100644 --- a/src/net/http/httputil/reverseproxy.go +++ b/src/net/http/httputil/reverseproxy.go @@ -448,6 +448,9 @@ func (m *maxLatencyWriter) Write(p []byte) (n int, err error) { func (m *maxLatencyWriter) delayedFlush() { m.mu.Lock() defer m.mu.Unlock() + if !m.flushPending { // if stop was called but AfterFunc already started this goroutine + return + } m.dst.Flush() m.flushPending = false } @@ -455,6 +458,7 @@ func (m *maxLatencyWriter) delayedFlush() { func (m *maxLatencyWriter) stop() { m.mu.Lock() defer m.mu.Unlock() + m.flushPending = false if m.t != nil { m.t.Stop() } From 8f9902da269c08ad9a741d828d7f6781f56a7a42 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= Date: Fri, 28 Sep 2018 15:29:58 +0200 Subject: [PATCH 072/240] syscall: add AIX operating system This commit adds AIX operating system to syscall package for ppc64 architecture. It also adds the file syscall_aix.go in the runtime package for syscalls needed during fork and exec. Updates: #25893 Change-Id: I301b1051b178a3efb7bbc39cdbd8e00b594d65ef Reviewed-on: https://go-review.googlesource.com/c/138720 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/runtime/syscall_aix.go | 212 +++++ src/syscall/dirent.go | 2 +- src/syscall/env_unix.go | 2 +- src/syscall/exec_aix_test.go | 37 + src/syscall/exec_unix_test.go | 2 +- src/syscall/flock_aix.go | 41 + src/syscall/forkpipe.go | 2 +- src/syscall/mkerrors.sh | 10 + src/syscall/mmap_unix_test.go | 2 +- src/syscall/sockcmsg_unix.go | 2 +- src/syscall/syscall_aix.go | 651 +++++++++++++++ src/syscall/syscall_aix_ppc64.go | 17 + src/syscall/syscall_unix.go | 2 +- src/syscall/timestruct.go | 2 +- src/syscall/types_aix.go | 172 ++++ src/syscall/zerrors_aix_ppc64.go | 1248 +++++++++++++++++++++++++++++ src/syscall/zsyscall_aix_ppc64.go | 1167 +++++++++++++++++++++++++++ src/syscall/ztypes_aix_ppc64.go | 272 +++++++ 18 files changed, 3835 insertions(+), 8 deletions(-) create mode 100644 src/runtime/syscall_aix.go create mode 100644 src/syscall/exec_aix_test.go create mode 100644 src/syscall/flock_aix.go create mode 100644 src/syscall/syscall_aix.go create mode 100644 src/syscall/syscall_aix_ppc64.go create mode 100644 src/syscall/types_aix.go create mode 100644 src/syscall/zerrors_aix_ppc64.go create mode 100644 src/syscall/zsyscall_aix_ppc64.go create mode 100644 src/syscall/ztypes_aix_ppc64.go diff --git a/src/runtime/syscall_aix.go b/src/runtime/syscall_aix.go new file mode 100644 index 0000000000..376e22d59a --- /dev/null +++ b/src/runtime/syscall_aix.go @@ -0,0 +1,212 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package runtime + +import "unsafe" + +// This file handles some syscalls from the syscall package +// Especially, syscalls use during forkAndExecInChild which must not split the stack + +//go:cgo_import_dynamic libc_chdir chdir "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_chroot chroot "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_dup2 dup2 "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_execve execve "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_fcntl fcntl "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_fork fork "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_ioctl ioctl "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_setgid setgid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_setgroups setgroups "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_setsid setsid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_setuid setuid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_setpgid setpgid "libc.a/shr_64.o" + +//go:linkname libc_chdir libc_chdir +//go:linkname libc_chroot libc_chroot +//go:linkname libc_dup2 libc_dup2 +//go:linkname libc_execve libc_execve +//go:linkname libc_fcntl libc_fcntl +//go:linkname libc_fork libc_fork +//go:linkname libc_ioctl libc_ioctl +//go:linkname libc_setgid libc_setgid +//go:linkname libc_setgroups libc_setgroups +//go:linkname libc_setsid libc_setsid +//go:linkname libc_setuid libc_setuid +//go:linkname libc_setpgid libc_setpgid + +var ( + libc_chdir, + libc_chroot, + libc_dup2, + libc_execve, + libc_fcntl, + libc_fork, + libc_ioctl, + libc_setgid, + libc_setgroups, + libc_setsid, + libc_setuid, + libc_setpgid libFunc +) + +// In syscall_syscall6 and syscall_rawsyscall6, r2 is always 0 +// as it's never used on AIX +// TODO: remove r2 from zsyscall_aix_$GOARCH.go + +// Syscall is needed because some packages (like net) need it too. +// The best way is to return EINVAL and let Golang handles its failure +// If the syscall can't fail, this function can redirect it to a real syscall. +//go:linkname syscall_Syscall syscall.Syscall +//go:nosplit +func syscall_Syscall(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) { + return 0, 0, _EINVAL +} + +// This is syscall.RawSyscall, it exists to satisfy some build dependency, +// but it doesn't work. +//go:linkname syscall_RawSyscall syscall.RawSyscall +func syscall_RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr) { + panic("RawSyscall not available on AIX") +} + +//go:linkname syscall_syscall6 syscall.syscall6 +//go:nosplit +func syscall_syscall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) { + c := getg().m.libcall + c.fn = uintptr(unsafe.Pointer(fn)) + c.n = nargs + c.args = uintptr(noescape(unsafe.Pointer(&a1))) + + entersyscallblock() + asmcgocall(unsafe.Pointer(&asmsyscall6), unsafe.Pointer(&c)) + exitsyscall() + return c.r1, 0, c.err +} + +//go:linkname syscall_rawSyscall6 syscall.rawSyscall6 +//go:nosplit +func syscall_rawSyscall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) { + c := getg().m.libcall + c.fn = uintptr(unsafe.Pointer(fn)) + c.n = nargs + c.args = uintptr(noescape(unsafe.Pointer(&a1))) + + asmcgocall(unsafe.Pointer(&asmsyscall6), unsafe.Pointer(&c)) + + return c.r1, 0, c.err +} + +//go:linkname syscall_chdir syscall.chdir +//go:nosplit +func syscall_chdir(path uintptr) (err uintptr) { + _, err = syscall1(&libc_chdir, path) + return +} + +//go:linkname syscall_chroot1 syscall.chroot1 +//go:nosplit +func syscall_chroot1(path uintptr) (err uintptr) { + _, err = syscall1(&libc_chroot, path) + return +} + +// like close, but must not split stack, for fork. +//go:linkname syscall_close syscall.close +//go:nosplit +func syscall_close(fd int32) int32 { + _, err := syscall1(&libc_close, uintptr(fd)) + return int32(err) +} + +//go:linkname syscall_dup2child syscall.dup2child +//go:nosplit +func syscall_dup2child(old, new uintptr) (val, err uintptr) { + val, err = syscall2(&libc_dup2, old, new) + return +} + +//go:linkname syscall_execve syscall.execve +//go:nosplit +func syscall_execve(path, argv, envp uintptr) (err uintptr) { + _, err = syscall3(&libc_execve, path, argv, envp) + return +} + +// like exit, but must not split stack, for fork. +//go:linkname syscall_exit syscall.exit +//go:nosplit +func syscall_exit(code uintptr) { + syscall1(&libc_exit, code) +} + +//go:linkname syscall_fcntl1 syscall.fcntl1 +//go:nosplit +func syscall_fcntl1(fd, cmd, arg uintptr) (val, err uintptr) { + val, err = syscall3(&libc_fcntl, fd, cmd, arg) + return + +} + +//go:linkname syscall_forkx syscall.forkx +//go:nosplit +func syscall_forkx(flags uintptr) (pid uintptr, err uintptr) { + pid, err = syscall1(&libc_fork, flags) + return +} + +//go:linkname syscall_getpid syscall.getpid +//go:nosplit +func syscall_getpid() (pid, err uintptr) { + pid, err = syscall0(&libc_getpid) + return +} + +//go:linkname syscall_ioctl syscall.ioctl +//go:nosplit +func syscall_ioctl(fd, req, arg uintptr) (err uintptr) { + _, err = syscall3(&libc_ioctl, fd, req, arg) + return +} + +//go:linkname syscall_setgid syscall.setgid +//go:nosplit +func syscall_setgid(gid uintptr) (err uintptr) { + _, err = syscall1(&libc_setgid, gid) + return +} + +//go:linkname syscall_setgroups1 syscall.setgroups1 +//go:nosplit +func syscall_setgroups1(ngid, gid uintptr) (err uintptr) { + _, err = syscall2(&libc_setgroups, ngid, gid) + return +} + +//go:linkname syscall_setsid syscall.setsid +//go:nosplit +func syscall_setsid() (pid, err uintptr) { + pid, err = syscall0(&libc_setsid) + return +} + +//go:linkname syscall_setuid syscall.setuid +//go:nosplit +func syscall_setuid(uid uintptr) (err uintptr) { + _, err = syscall1(&libc_setuid, uid) + return +} + +//go:linkname syscall_setpgid syscall.setpgid +//go:nosplit +func syscall_setpgid(pid, pgid uintptr) (err uintptr) { + _, err = syscall2(&libc_setpgid, pid, pgid) + return +} + +//go:linkname syscall_write1 syscall.write1 +//go:nosplit +func syscall_write1(fd, buf, nbyte uintptr) (n, err uintptr) { + n, err = syscall3(&libc_write, fd, buf, nbyte) + return +} diff --git a/src/syscall/dirent.go b/src/syscall/dirent.go index 26cbbbce2a..5c7af42b0c 100644 --- a/src/syscall/dirent.go +++ b/src/syscall/dirent.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris package syscall diff --git a/src/syscall/env_unix.go b/src/syscall/env_unix.go index 1ebc0b17f2..0b6b711a8f 100644 --- a/src/syscall/env_unix.go +++ b/src/syscall/env_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris // Unix environment variables. diff --git a/src/syscall/exec_aix_test.go b/src/syscall/exec_aix_test.go new file mode 100644 index 0000000000..22b752cf27 --- /dev/null +++ b/src/syscall/exec_aix_test.go @@ -0,0 +1,37 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build aix + +package syscall + +import "unsafe" + +//go:cgo_import_dynamic libc_Getpgid getpgid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Getpgrp getpgrp "libc.a/shr_64.o" + +//go:linkname libc_Getpgid libc_Getpgid +//go:linkname libc_Getpgrp libc_Getpgrp + +var ( + libc_Getpgid, + libc_Getpgrp libcFunc +) + +func Getpgid(pid int) (pgid int, err error) { + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Getpgid)), 1, uintptr(pid), 0, 0, 0, 0, 0) + pgid = int(r0) + if e1 != 0 { + err = e1 + } + return +} + +func Getpgrp() (pgrp int) { + r0, _, _ := syscall6(uintptr(unsafe.Pointer(&libc_Getpgrp)), 0, 0, 0, 0, 0, 0, 0) + pgrp = int(r0) + return +} + +var Ioctl = ioctl diff --git a/src/syscall/exec_unix_test.go b/src/syscall/exec_unix_test.go index 9bb95c0f39..33614f5221 100644 --- a/src/syscall/exec_unix_test.go +++ b/src/syscall/exec_unix_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris package syscall_test diff --git a/src/syscall/flock_aix.go b/src/syscall/flock_aix.go new file mode 100644 index 0000000000..9745236dcb --- /dev/null +++ b/src/syscall/flock_aix.go @@ -0,0 +1,41 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package syscall + +import "unsafe" + +// On AIX, there is no flock() system call, we emulate it. +// Moreover, we can't call the default fcntl syscall because the arguments +// must be integer and it's not possible to transform a pointer (lk) +// to a int value. +// It's easier to call syscall6 than to transform fcntl for every GOOS. +func fcntlFlock(fd, cmd int, lk *Flock_t) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_fcntl)), 3, uintptr(fd), uintptr(cmd), uintptr(unsafe.Pointer(lk)), 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Flock(fd int, op int) (err error) { + lk := &Flock_t{} + if (op & LOCK_UN) != 0 { + lk.Type = F_UNLCK + } else if (op & LOCK_EX) != 0 { + lk.Type = F_WRLCK + } else if (op & LOCK_SH) != 0 { + lk.Type = F_RDLCK + } else { + return nil + } + if (op & LOCK_NB) != 0 { + err = fcntlFlock(fd, F_SETLK, lk) + if err != nil && (err == EAGAIN || err == EACCES) { + return EWOULDBLOCK + } + return err + } + return fcntlFlock(fd, F_SETLKW, lk) +} diff --git a/src/syscall/forkpipe.go b/src/syscall/forkpipe.go index 71890a29ba..d9999cb8b8 100644 --- a/src/syscall/forkpipe.go +++ b/src/syscall/forkpipe.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly solaris +// +build aix darwin dragonfly solaris package syscall diff --git a/src/syscall/mkerrors.sh b/src/syscall/mkerrors.sh index 93d6f7d2b6..d5880dcaf2 100755 --- a/src/syscall/mkerrors.sh +++ b/src/syscall/mkerrors.sh @@ -20,6 +20,16 @@ fi uname=$(uname) +includes_AIX=' +#include +#include +#include +#include +#include +#include +#include +' + includes_Darwin=' #define _DARWIN_C_SOURCE #define KERNEL diff --git a/src/syscall/mmap_unix_test.go b/src/syscall/mmap_unix_test.go index 01f7783022..d0b3644b59 100644 --- a/src/syscall/mmap_unix_test.go +++ b/src/syscall/mmap_unix_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd +// +build aix darwin dragonfly freebsd linux netbsd openbsd package syscall_test diff --git a/src/syscall/sockcmsg_unix.go b/src/syscall/sockcmsg_unix.go index 5712bf13f2..5020033bad 100644 --- a/src/syscall/sockcmsg_unix.go +++ b/src/syscall/sockcmsg_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris // Socket control messages diff --git a/src/syscall/syscall_aix.go b/src/syscall/syscall_aix.go new file mode 100644 index 0000000000..bddc590c34 --- /dev/null +++ b/src/syscall/syscall_aix.go @@ -0,0 +1,651 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Aix system calls. +// This file is compiled as ordinary Go code, +// but it is also input to mksyscall, +// which parses the //sys lines and generates system call stubs. +// Note that sometimes we use a lowercase //sys name and +// wrap it in our own nicer implementation. + +package syscall + +import ( + "unsafe" +) + +// Implemented in runtime/syscall_aix.go. +func rawSyscall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) +func syscall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) + +// Constant expected by package but not supported +const ( + _ = iota + TIOCSCTTY + F_DUPFD_CLOEXEC + SYS_EXECVE + SYS_FCNTL +) + +/* + * Wrapped + */ + +// fcntl must never be called with cmd=F_DUP2FD because it doesn't work on AIX +// There is no way to create a custom fcntl and to keep //sys fcntl easily, +// because we need fcntl name for its libc symbol. This is linked with the script. +// But, as fcntl is currently not exported and isn't called with F_DUP2FD, +// it doesn't matter. +//sys fcntl(fd int, cmd int, arg int) (val int, err error) +//sys dup2(old int, new int) (val int, err error) + +//sysnb pipe(p *[2]_C_int) (err error) +func Pipe(p []int) (err error) { + if len(p) != 2 { + return EINVAL + } + var pp [2]_C_int + err = pipe(&pp) + p[0] = int(pp[0]) + p[1] = int(pp[1]) + return +} + +//sys readlink(path string, buf []byte, bufSize uint64) (n int, err error) +func Readlink(path string, buf []byte) (n int, err error) { + s := uint64(len(buf)) + return readlink(path, buf, s) +} + +//sys utimes(path string, times *[2]Timeval) (err error) +func Utimes(path string, tv []Timeval) error { + if len(tv) != 2 { + return EINVAL + } + return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) +} + +//sys utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error) +func UtimesNano(path string, ts []Timespec) error { + if len(ts) != 2 { + return EINVAL + } + return utimensat(_AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0) +} + +//sys unlinkat(dirfd int, path string, flags int) (err error) +func Unlinkat(dirfd int, path string) (err error) { + return unlinkat(dirfd, path, 0) +} + +//sys getcwd(buf *byte, size uint64) (err error) + +const ImplementsGetwd = true + +func Getwd() (ret string, err error) { + for len := uint64(4096); ; len *= 2 { + b := make([]byte, len) + err := getcwd(&b[0], len) + if err == nil { + i := 0 + for b[i] != 0 { + i++ + } + return string(b[0:i]), nil + } + if err != ERANGE { + return "", err + } + } +} + +func Getcwd(buf []byte) (n int, err error) { + err = getcwd(&buf[0], uint64(len(buf))) + if err == nil { + i := 0 + for buf[i] != 0 { + i++ + } + n = i + 1 + } + return +} + +//sysnb getgroups(ngid int, gid *_Gid_t) (n int, err error) +//sysnb setgroups(ngid int, gid *_Gid_t) (err error) + +func Getgroups() (gids []int, err error) { + n, err := getgroups(0, nil) + if err != nil { + return nil, err + } + if n == 0 { + return nil, nil + } + + // Sanity check group count. Max is 16 on BSD. + if n < 0 || n > 1000 { + return nil, EINVAL + } + + a := make([]_Gid_t, n) + n, err = getgroups(n, &a[0]) + if err != nil { + return nil, err + } + gids = make([]int, n) + for i, v := range a[0:n] { + gids[i] = int(v) + } + return +} + +func Setgroups(gids []int) (err error) { + if len(gids) == 0 { + return setgroups(0, nil) + } + + a := make([]_Gid_t, len(gids)) + for i, v := range gids { + a[i] = _Gid_t(v) + } + return setgroups(len(a), &a[0]) +} + +func direntIno(buf []byte) (uint64, bool) { + return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino)) +} + +func direntReclen(buf []byte) (uint64, bool) { + return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen)) +} + +func direntNamlen(buf []byte) (uint64, bool) { + reclen, ok := direntReclen(buf) + if !ok { + return 0, false + } + return reclen - uint64(unsafe.Offsetof(Dirent{}.Name)), true +} + +func Gettimeofday(tv *Timeval) (err error) { + err = gettimeofday(tv, nil) + return +} + +// TODO +func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { + return -1, ENOSYS +} + +//sys getdirent(fd int, buf []byte) (n int, err error) +func ReadDirent(fd int, buf []byte) (n int, err error) { + return getdirent(fd, buf) +} + +//sys wait4(pid Pid_t, status *_C_int, options int, rusage *Rusage) (wpid Pid_t, err error) +func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) { + var status _C_int + var r Pid_t + err = ERESTART + // AIX wait4 may return with ERESTART errno, while the processus is still + // active. + for err == ERESTART { + r, err = wait4(Pid_t(pid), &status, options, rusage) + } + wpid = int(r) + if wstatus != nil { + *wstatus = WaitStatus(status) + } + return +} + +/* + * Socket + */ +//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) +//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) +//sys Getkerninfo(op int32, where uintptr, size uintptr, arg int64) (i int32, err error) +//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) +//sys Listen(s int, backlog int) (err error) +//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) +//sys socket(domain int, typ int, proto int) (fd int, err error) +//sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) +//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) +//sys getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) +//sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) +//sys sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) +//sys Shutdown(s int, how int) (err error) +//sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) +//sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) + +func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) { + if sa.Port < 0 || sa.Port > 0xFFFF { + return nil, 0, EINVAL + } + sa.raw.Family = AF_INET + p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) + p[0] = byte(sa.Port >> 8) + p[1] = byte(sa.Port) + for i := 0; i < len(sa.Addr); i++ { + sa.raw.Addr[i] = sa.Addr[i] + } + return unsafe.Pointer(&sa.raw), SizeofSockaddrInet4, nil +} + +func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) { + if sa.Port < 0 || sa.Port > 0xFFFF { + return nil, 0, EINVAL + } + sa.raw.Family = AF_INET6 + p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) + p[0] = byte(sa.Port >> 8) + p[1] = byte(sa.Port) + sa.raw.Scope_id = sa.ZoneId + for i := 0; i < len(sa.Addr); i++ { + sa.raw.Addr[i] = sa.Addr[i] + } + return unsafe.Pointer(&sa.raw), SizeofSockaddrInet6, nil +} + +func (sa *RawSockaddrUnix) setLen(n int) { + sa.Len = uint8(3 + n) // 2 for Family, Len; 1 for NUL. +} + +func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) { + name := sa.Name + n := len(name) + if n > len(sa.raw.Path) { + return nil, 0, EINVAL + } + sa.raw.Family = AF_UNIX + sa.raw.setLen(n) + for i := 0; i < n; i++ { + sa.raw.Path[i] = uint8(name[i]) + } + // length is family (uint16), name, NUL. + sl := _Socklen(2) + if n > 0 { + sl += _Socklen(n) + 1 + } + + return unsafe.Pointer(&sa.raw), sl, nil +} + +func Getsockname(fd int) (sa Sockaddr, err error) { + var rsa RawSockaddrAny + var len _Socklen = SizeofSockaddrAny + if err = getsockname(fd, &rsa, &len); err != nil { + return + } + return anyToSockaddr(&rsa) +} + +//sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) +func Accept(fd int) (nfd int, sa Sockaddr, err error) { + var rsa RawSockaddrAny + var len _Socklen = SizeofSockaddrAny + nfd, err = accept(fd, &rsa, &len) + if err != nil { + return + } + sa, err = anyToSockaddr(&rsa) + if err != nil { + Close(nfd) + nfd = 0 + } + return +} + +func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) { + var msg Msghdr + var rsa RawSockaddrAny + msg.Name = (*byte)(unsafe.Pointer(&rsa)) + msg.Namelen = uint32(SizeofSockaddrAny) + var iov Iovec + if len(p) > 0 { + iov.Base = (*byte)(unsafe.Pointer(&p[0])) + iov.SetLen(len(p)) + } + var dummy byte + if len(oob) > 0 { + var sockType int + sockType, err = GetsockoptInt(fd, SOL_SOCKET, SO_TYPE) + if err != nil { + return + } + // receive at least one normal byte + if sockType != SOCK_DGRAM && len(p) == 0 { + iov.Base = &dummy + iov.SetLen(1) + } + msg.Control = (*byte)(unsafe.Pointer(&oob[0])) + msg.SetControllen(len(oob)) + } + msg.Iov = &iov + msg.Iovlen = 1 + if n, err = recvmsg(fd, &msg, flags); err != nil { + return + } + oobn = int(msg.Controllen) + recvflags = int(msg.Flags) + // source address is only specified if the socket is unconnected + if rsa.Addr.Family != AF_UNSPEC { + from, err = anyToSockaddr(&rsa) + } + return +} + +func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (err error) { + _, err = SendmsgN(fd, p, oob, to, flags) + return +} + +func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error) { + var ptr unsafe.Pointer + var salen _Socklen + if to != nil { + ptr, salen, err = to.sockaddr() + if err != nil { + return 0, err + } + } + var msg Msghdr + msg.Name = (*byte)(unsafe.Pointer(ptr)) + msg.Namelen = uint32(salen) + var iov Iovec + if len(p) > 0 { + iov.Base = (*byte)(unsafe.Pointer(&p[0])) + iov.SetLen(len(p)) + } + var dummy byte + if len(oob) > 0 { + var sockType int + sockType, err = GetsockoptInt(fd, SOL_SOCKET, SO_TYPE) + if err != nil { + return 0, err + } + // send at least one normal byte + if sockType != SOCK_DGRAM && len(p) == 0 { + iov.Base = &dummy + iov.SetLen(1) + } + msg.Control = (*byte)(unsafe.Pointer(&oob[0])) + msg.SetControllen(len(oob)) + } + msg.Iov = &iov + msg.Iovlen = 1 + if n, err = sendmsg(fd, &msg, flags); err != nil { + return 0, err + } + if len(oob) > 0 && len(p) == 0 { + n = 0 + } + return n, nil +} + +func (sa *RawSockaddrUnix) getLen() (int, error) { + // Some versions of AIX have a bug in getsockname (see IV78655). + // We can't rely on sa.Len being set correctly. + n := SizeofSockaddrUnix - 3 // substract leading Family, Len, terminating NUL. + for i := 0; i < n; i++ { + if sa.Path[i] == 0 { + n = i + break + } + } + return n, nil +} + +func anyToSockaddr(rsa *RawSockaddrAny) (Sockaddr, error) { + switch rsa.Addr.Family { + case AF_UNIX: + pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa)) + sa := new(SockaddrUnix) + n, err := pp.getLen() + if err != nil { + return nil, err + } + bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0])) + sa.Name = string(bytes[0:n]) + return sa, nil + + case AF_INET: + pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa)) + sa := new(SockaddrInet4) + p := (*[2]byte)(unsafe.Pointer(&pp.Port)) + sa.Port = int(p[0])<<8 + int(p[1]) + for i := 0; i < len(sa.Addr); i++ { + sa.Addr[i] = pp.Addr[i] + } + return sa, nil + + case AF_INET6: + pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa)) + sa := new(SockaddrInet6) + p := (*[2]byte)(unsafe.Pointer(&pp.Port)) + sa.Port = int(p[0])<<8 + int(p[1]) + for i := 0; i < len(sa.Addr); i++ { + sa.Addr[i] = pp.Addr[i] + } + return sa, nil + } + return nil, EAFNOSUPPORT +} + +/* + * Wait + */ + +type WaitStatus uint32 + +func (w WaitStatus) Stopped() bool { return w&0x40 != 0 } +func (w WaitStatus) StopSignal() Signal { + if !w.Stopped() { + return -1 + } + return Signal(w>>8) & 0xFF +} + +func (w WaitStatus) Exited() bool { return w&0xFF == 0 } +func (w WaitStatus) ExitStatus() int { + if !w.Exited() { + return -1 + } + return int((w >> 8) & 0xFF) +} + +func (w WaitStatus) Signaled() bool { return w&0x40 == 0 && w&0xFF != 0 } +func (w WaitStatus) Signal() Signal { + if !w.Signaled() { + return -1 + } + return Signal(w>>16) & 0xFF +} + +func (w WaitStatus) Continued() bool { return w&0x01000000 != 0 } + +func (w WaitStatus) CoreDump() bool { return w&0x200 == 0 } + +func (w WaitStatus) TrapCause() int { return -1 } + +/* + * ptrace + */ + +//sys Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) +//sys ptrace64(request int, id int64, addr int64, data int, buff uintptr) (err error) + +func raw_ptrace(request int, pid int, addr *byte, data *byte) Errno { + if request == PTRACE_TRACEME { + // Convert to AIX ptrace call. + err := ptrace64(PT_TRACE_ME, 0, 0, 0, 0) + if err != nil { + return err.(Errno) + } + return 0 + } + return ENOSYS +} + +func ptracePeek(pid int, addr uintptr, out []byte) (count int, err error) { + n := 0 + for len(out) > 0 { + bsize := len(out) + if bsize > 1024 { + bsize = 1024 + } + err = ptrace64(PT_READ_BLOCK, int64(pid), int64(addr), bsize, uintptr(unsafe.Pointer(&out[0]))) + if err != nil { + return 0, err + } + addr += uintptr(bsize) + n += bsize + out = out[n:] + } + return n, nil +} + +func PtracePeekText(pid int, addr uintptr, out []byte) (count int, err error) { + return ptracePeek(pid, addr, out) +} + +func PtracePeekData(pid int, addr uintptr, out []byte) (count int, err error) { + return ptracePeek(pid, addr, out) +} + +func ptracePoke(pid int, addr uintptr, data []byte) (count int, err error) { + n := 0 + for len(data) > 0 { + bsize := len(data) + if bsize > 1024 { + bsize = 1024 + } + err = ptrace64(PT_WRITE_BLOCK, int64(pid), int64(addr), bsize, uintptr(unsafe.Pointer(&data[0]))) + if err != nil { + return 0, err + } + addr += uintptr(bsize) + n += bsize + data = data[n:] + } + return n, nil +} + +func PtracePokeText(pid int, addr uintptr, data []byte) (count int, err error) { + return ptracePoke(pid, addr, data) +} + +func PtracePokeData(pid int, addr uintptr, data []byte) (count int, err error) { + return ptracePoke(pid, addr, data) +} + +func PtraceCont(pid int, signal int) (err error) { + return ptrace64(PT_CONTINUE, int64(pid), 1, signal, 0) +} + +func PtraceSingleStep(pid int) (err error) { return ptrace64(PT_STEP, int64(pid), 1, 0, 0) } + +func PtraceAttach(pid int) (err error) { return ptrace64(PT_ATTACH, int64(pid), 0, 0, 0) } + +func PtraceDetach(pid int) (err error) { return ptrace64(PT_DETACH, int64(pid), 0, 0, 0) } + +/* + * Direct access + */ + +//sys Acct(path string) (err error) +//sys Chdir(path string) (err error) +//sys Chmod(path string, mode uint32) (err error) +//sys Chown(path string, uid int, gid int) (err error) +//sys Close(fd int) (err error) +//sys Dup(fd int) (nfd int, err error) +//sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error) +//sys Fchdir(fd int) (err error) +//sys Fchmod(fd int, mode uint32) (err error) +//sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) +//sys Fchown(fd int, uid int, gid int) (err error) +//sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) +//sys Fpathconf(fd int, name int) (val int, err error) +//sys Fstat(fd int, stat *Stat_t) (err error) +//sys Fstatfs(fd int, buf *Statfs_t) (err error) +//sys Ftruncate(fd int, length int64) (err error) +//sys Fsync(fd int) (err error) +//sysnb Getgid() (gid int) +//sysnb Getpid() (pid int) +//sys Geteuid() (euid int) +//sys Getegid() (egid int) +//sys Getppid() (ppid int) +//sysnb Getrlimit(which int, lim *Rlimit) (err error) +//sysnb Getuid() (uid int) +//sys Kill(pid int, signum Signal) (err error) +//sys Lchown(path string, uid int, gid int) (err error) +//sys Link(path string, link string) (err error) +//sys Lstat(path string, stat *Stat_t) (err error) +//sys Mkdir(path string, mode uint32) (err error) +//sys Mkdirat(dirfd int, path string, mode uint32) (err error) +//sys Mknodat(dirfd int, path string, mode uint32, dev int) (err error) +//sys Open(path string, mode int, perm uint32) (fd int, err error) +//sys Pread(fd int, p []byte, offset int64) (n int, err error) +//sys Pwrite(fd int, p []byte, offset int64) (n int, err error) +//sys read(fd int, p []byte) (n int, err error) +//sys Reboot(how int) (err error) +//sys Rename(from string, to string) (err error) +//sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) +//sys Rmdir(path string) (err error) +//sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = lseek +//sysnb Setegid(egid int) (err error) +//sysnb Seteuid(euid int) (err error) +//sysnb Setgid(gid int) (err error) +//sysnb Setpgid(pid int, pgid int) (err error) +//sysnb Setregid(rgid int, egid int) (err error) +//sysnb Setreuid(ruid int, euid int) (err error) +//sys Stat(path string, stat *Stat_t) (err error) +//sys Statfs(path string, buf *Statfs_t) (err error) +//sys Symlink(path string, link string) (err error) +//sys Truncate(path string, length int64) (err error) +//sys Umask(newmask int) (oldmask int) +//sys Unlink(path string) (err error) +//sysnb Uname(buf *Utsname) (err error) +//sys write(fd int, p []byte) (n int, err error) + +//sys gettimeofday(tv *Timeval, tzp *Timezone) (err error) + +func setTimespec(sec, nsec int64) Timespec { + return Timespec{Sec: sec, Nsec: nsec} +} + +func setTimeval(sec, usec int64) Timeval { + return Timeval{Sec: sec, Usec: int32(usec)} +} + +func readlen(fd int, buf *byte, nbuf int) (n int, err error) { + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_read)), 3, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf), 0, 0, 0) + n = int(r0) + if e1 != 0 { + err = e1 + } + return +} + +/* + * Map + */ + +var mapper = &mmapper{ + active: make(map[*byte][]byte), + mmap: mmap, + munmap: munmap, +} + +//sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) +//sys munmap(addr uintptr, length uintptr) (err error) + +func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { + return mapper.Mmap(fd, offset, length, prot, flags) +} + +func Munmap(b []byte) (err error) { + return mapper.Munmap(b) +} diff --git a/src/syscall/syscall_aix_ppc64.go b/src/syscall/syscall_aix_ppc64.go new file mode 100644 index 0000000000..21ad5bc296 --- /dev/null +++ b/src/syscall/syscall_aix_ppc64.go @@ -0,0 +1,17 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package syscall + +func (iov *Iovec) SetLen(length int) { + iov.Len = uint64(length) +} + +func (msghdr *Msghdr) SetControllen(length int) { + msghdr.Controllen = uint32(length) +} + +func (cmsg *Cmsghdr) SetLen(length int) { + cmsg.Len = uint32(length) +} diff --git a/src/syscall/syscall_unix.go b/src/syscall/syscall_unix.go index c9c0f62dd2..4336851554 100644 --- a/src/syscall/syscall_unix.go +++ b/src/syscall/syscall_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris package syscall diff --git a/src/syscall/timestruct.go b/src/syscall/timestruct.go index 84a00a77d8..d17811c121 100644 --- a/src/syscall/timestruct.go +++ b/src/syscall/timestruct.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris package syscall diff --git a/src/syscall/types_aix.go b/src/syscall/types_aix.go new file mode 100644 index 0000000000..f9f05af667 --- /dev/null +++ b/src/syscall/types_aix.go @@ -0,0 +1,172 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build ignore + +/* +Input to cgo -godefs. See also mkerrors.sh and mkall.sh +*/ + +// +godefs map struct_in_addr [4]byte /* in_addr */ +// +godefs map struct_in6_addr [16]byte /* in6_addr */ + +package syscall + +/* +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + + +#include +#include +#include + +enum { + sizeofPtr = sizeof(void*), +}; + +union sockaddr_all { + struct sockaddr s1; // this one gets used for fields + struct sockaddr_in s2; // these pad it out + struct sockaddr_in6 s3; + struct sockaddr_un s4; +}; + +struct sockaddr_any { + struct sockaddr addr; + char pad[sizeof(union sockaddr_all) - sizeof(struct sockaddr)]; +}; + +*/ +import "C" + +// Machine characteristics; for internal use. + +const ( + sizeofPtr = C.sizeofPtr + sizeofShort = C.sizeof_short + sizeofInt = C.sizeof_int + sizeofLong = C.sizeof_long + sizeofLongLong = C.sizeof_longlong + PathMax = C.PATH_MAX +) + +// Basic types + +type ( + _C_short C.short + _C_int C.int + _C_long C.long + _C_long_long C.longlong +) + +// Time + +type Timespec C.struct_timespec + +type Timeval C.struct_timeval + +type Timeval32 C.struct_timeval32 + +type Timezone C.struct_timezone + +// Processes + +type Rusage C.struct_rusage + +type Rlimit C.struct_rlimit + +type Pid_t C.pid_t + +type _Gid_t C.gid_t + +// Files + +type Flock_t C.struct_flock + +type Stat_t C.struct_stat + +type Statfs_t C.struct_statfs + +type Fsid64_t C.fsid64_t + +type StTimespec_t C.st_timespec_t + +type Dirent C.struct_dirent + +// Sockets + +type RawSockaddrInet4 C.struct_sockaddr_in + +type RawSockaddrInet6 C.struct_sockaddr_in6 + +type RawSockaddrUnix C.struct_sockaddr_un + +type RawSockaddr C.struct_sockaddr + +type RawSockaddrAny C.struct_sockaddr_any + +type _Socklen C.socklen_t + +type Cmsghdr C.struct_cmsghdr + +type ICMPv6Filter C.struct_icmp6_filter + +type Iovec C.struct_iovec + +type IPMreq C.struct_ip_mreq + +type IPv6Mreq C.struct_ipv6_mreq + +type Linger C.struct_linger + +type Msghdr C.struct_msghdr + +const ( + SizeofSockaddrInet4 = C.sizeof_struct_sockaddr_in + SizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6 + SizeofSockaddrAny = C.sizeof_struct_sockaddr_any + SizeofSockaddrUnix = C.sizeof_struct_sockaddr_un + SizeofLinger = C.sizeof_struct_linger + SizeofIPMreq = C.sizeof_struct_ip_mreq + SizeofIPv6Mreq = C.sizeof_struct_ipv6_mreq + SizeofMsghdr = C.sizeof_struct_msghdr + SizeofCmsghdr = C.sizeof_struct_cmsghdr + SizeofICMPv6Filter = C.sizeof_struct_icmp6_filter +) + +// Ptrace requests + +const ( + PTRACE_TRACEME = C.PT_TRACE_ME + PTRACE_CONT = C.PT_CONTINUE + PTRACE_KILL = C.PT_KILL +) + +// Routing and interface messages + +const ( + SizeofIfMsghdr = C.sizeof_struct_if_msghdr +) + +type IfMsgHdr C.struct_if_msghdr + +// Misc + +type Utsname C.struct_utsname + +const ( + _AT_FDCWD = C.AT_FDCWD + _AT_REMOVEDIR = C.AT_REMOVEDIR + _AT_SYMLINK_NOFOLLOW = C.AT_SYMLINK_NOFOLLOW +) diff --git a/src/syscall/zerrors_aix_ppc64.go b/src/syscall/zerrors_aix_ppc64.go new file mode 100644 index 0000000000..60130099a7 --- /dev/null +++ b/src/syscall/zerrors_aix_ppc64.go @@ -0,0 +1,1248 @@ +// mkerrors.sh -maix64 +// Code generated by the command above; DO NOT EDIT. + +// Code generated by cmd/cgo -godefs; DO NOT EDIT. +// cgo -godefs -- -maix64 _const.go + +package syscall + +const ( + AF_APPLETALK = 0x10 + AF_BYPASS = 0x19 + AF_CCITT = 0xa + AF_CHAOS = 0x5 + AF_DATAKIT = 0x9 + AF_DECnet = 0xc + AF_DLI = 0xd + AF_ECMA = 0x8 + AF_HYLINK = 0xf + AF_IMPLINK = 0x3 + AF_INET = 0x2 + AF_INET6 = 0x18 + AF_INTF = 0x14 + AF_ISO = 0x7 + AF_LAT = 0xe + AF_LINK = 0x12 + AF_MAX = 0x1e + AF_NDD = 0x17 + AF_NETWARE = 0x16 + AF_NS = 0x6 + AF_OSI = 0x7 + AF_PUP = 0x4 + AF_RIF = 0x15 + AF_ROUTE = 0x11 + AF_SNA = 0xb + AF_UNIX = 0x1 + AF_UNSPEC = 0x0 + ARPHRD_802_3 = 0x6 + ARPHRD_802_5 = 0x6 + ARPHRD_ETHER = 0x1 + ARPHRD_FDDI = 0x1 + B0 = 0x0 + B110 = 0x3 + B1200 = 0x9 + B134 = 0x4 + B150 = 0x5 + B1800 = 0xa + B19200 = 0xe + B200 = 0x6 + B2400 = 0xb + B300 = 0x7 + B38400 = 0xf + B4800 = 0xc + B50 = 0x1 + B600 = 0x8 + B75 = 0x2 + B9600 = 0xd + CFLUSH = 0xf + CSIOCGIFCONF = -0x3fef96dc + CSTART = '\021' + CSTOP = '\023' + CSUSP = 0x1a + ECHO = 0x8 + ECH_ICMPID = 0x2 + ETHERNET_CSMACD = 0x6 + EVENP = 0x80 + EXCONTINUE = 0x0 + EXDLOK = 0x3 + EXIO = 0x2 + EXPGIO = 0x0 + EXRESUME = 0x2 + EXRETURN = 0x1 + EXSIG = 0x4 + EXTA = 0xe + EXTB = 0xf + EXTRAP = 0x1 + EYEC_RTENTRYA = 0x257274656e747241 + EYEC_RTENTRYF = 0x257274656e747246 + E_ACC = 0x0 + FD_CLOEXEC = 0x1 + FD_SETSIZE = 0xfffe + FLUSHBAND = 0x40 + FLUSHLOW = 0x8 + FLUSHO = 0x100000 + FLUSHR = 0x1 + FLUSHRW = 0x3 + FLUSHW = 0x2 + F_CLOSEM = 0xa + F_DUP2FD = 0xe + F_DUPFD = 0x0 + F_GETFD = 0x1 + F_GETFL = 0x3 + F_GETLK = 0xb + F_GETLK64 = 0xb + F_GETOWN = 0x8 + F_LOCK = 0x1 + F_OK = 0x0 + F_RDLCK = 0x1 + F_SETFD = 0x2 + F_SETFL = 0x4 + F_SETLK = 0xc + F_SETLK64 = 0xc + F_SETLKW = 0xd + F_SETLKW64 = 0xd + F_SETOWN = 0x9 + F_TEST = 0x3 + F_TLOCK = 0x2 + F_TSTLK = 0xf + F_ULOCK = 0x0 + F_UNLCK = 0x3 + F_WRLCK = 0x2 + ICMP6_FILTER = 0x26 + ICMP6_SEC_SEND_DEL = 0x46 + ICMP6_SEC_SEND_GET = 0x47 + ICMP6_SEC_SEND_SET = 0x44 + ICMP6_SEC_SEND_SET_CGA_ADDR = 0x45 + IFA_FIRSTALIAS = 0x2000 + IFA_ROUTE = 0x1 + IFF_64BIT = 0x4000000 + IFF_ALLCAST = 0x20000 + IFF_ALLMULTI = 0x200 + IFF_BPF = 0x8000000 + IFF_BRIDGE = 0x40000 + IFF_BROADCAST = 0x2 + IFF_CANTCHANGE = 0x80c52 + IFF_CHECKSUM_OFFLOAD = 0x10000000 + IFF_D1 = 0x8000 + IFF_D2 = 0x4000 + IFF_D3 = 0x2000 + IFF_D4 = 0x1000 + IFF_DEBUG = 0x4 + IFF_DEVHEALTH = 0x4000 + IFF_DO_HW_LOOPBACK = 0x10000 + IFF_GROUP_ROUTING = 0x2000000 + IFF_IFBUFMGT = 0x800000 + IFF_LINK0 = 0x100000 + IFF_LINK1 = 0x200000 + IFF_LINK2 = 0x400000 + IFF_LOOPBACK = 0x8 + IFF_MULTICAST = 0x80000 + IFF_NOARP = 0x80 + IFF_NOECHO = 0x800 + IFF_NOTRAILERS = 0x20 + IFF_OACTIVE = 0x400 + IFF_POINTOPOINT = 0x10 + IFF_PROMISC = 0x100 + IFF_PSEG = 0x40000000 + IFF_RUNNING = 0x40 + IFF_SIMPLEX = 0x800 + IFF_SNAP = 0x8000 + IFF_TCP_DISABLE_CKSUM = 0x20000000 + IFF_TCP_NOCKSUM = 0x1000000 + IFF_UP = 0x1 + IFF_VIPA = 0x80000000 + IFNAMSIZ = 0x10 + IFO_FLUSH = 0x1 + IFT_1822 = 0x2 + IFT_AAL5 = 0x31 + IFT_ARCNET = 0x23 + IFT_ARCNETPLUS = 0x24 + IFT_ATM = 0x25 + IFT_CEPT = 0x13 + IFT_CLUSTER = 0x3e + IFT_DS3 = 0x1e + IFT_EON = 0x19 + IFT_ETHER = 0x6 + IFT_FCS = 0x3a + IFT_FDDI = 0xf + IFT_FRELAY = 0x20 + IFT_FRELAYDCE = 0x2c + IFT_GIFTUNNEL = 0x3c + IFT_HDH1822 = 0x3 + IFT_HF = 0x3d + IFT_HIPPI = 0x2f + IFT_HSSI = 0x2e + IFT_HY = 0xe + IFT_IB = 0xc7 + IFT_ISDNBASIC = 0x14 + IFT_ISDNPRIMARY = 0x15 + IFT_ISO88022LLC = 0x29 + IFT_ISO88023 = 0x7 + IFT_ISO88024 = 0x8 + IFT_ISO88025 = 0x9 + IFT_ISO88026 = 0xa + IFT_LAPB = 0x10 + IFT_LOCALTALK = 0x2a + IFT_LOOP = 0x18 + IFT_MIOX25 = 0x26 + IFT_MODEM = 0x30 + IFT_NSIP = 0x1b + IFT_OTHER = 0x1 + IFT_P10 = 0xc + IFT_P80 = 0xd + IFT_PARA = 0x22 + IFT_PPP = 0x17 + IFT_PROPMUX = 0x36 + IFT_PROPVIRTUAL = 0x35 + IFT_PTPSERIAL = 0x16 + IFT_RS232 = 0x21 + IFT_SDLC = 0x11 + IFT_SIP = 0x1f + IFT_SLIP = 0x1c + IFT_SMDSDXI = 0x2b + IFT_SMDSICIP = 0x34 + IFT_SN = 0x38 + IFT_SONET = 0x27 + IFT_SONETPATH = 0x32 + IFT_SONETVT = 0x33 + IFT_SP = 0x39 + IFT_STARLAN = 0xb + IFT_T1 = 0x12 + IFT_TUNNEL = 0x3b + IFT_ULTRA = 0x1d + IFT_V35 = 0x2d + IFT_VIPA = 0x37 + IFT_X25 = 0x5 + IFT_X25DDN = 0x4 + IFT_X25PLE = 0x28 + IFT_XETHER = 0x1a + IN_CLASSA_HOST = 0xffffff + IN_CLASSA_MAX = 0x80 + IN_CLASSA_NET = 0xff000000 + IN_CLASSA_NSHIFT = 0x18 + IN_CLASSB_HOST = 0xffff + IN_CLASSB_MAX = 0x10000 + IN_CLASSB_NET = 0xffff0000 + IN_CLASSB_NSHIFT = 0x10 + IN_CLASSC_HOST = 0xff + IN_CLASSC_NET = 0xffffff00 + IN_CLASSC_NSHIFT = 0x8 + IN_CLASSD_HOST = 0xfffffff + IN_CLASSD_NET = 0xf0000000 + IN_CLASSD_NSHIFT = 0x1c + IN_LOOPBACKNET = 0x7f + IN_USE = 0x1 + IPPROTO_AH = 0x33 + IPPROTO_BIP = 0x53 + IPPROTO_DSTOPTS = 0x3c + IPPROTO_EGP = 0x8 + IPPROTO_EON = 0x50 + IPPROTO_ESP = 0x32 + IPPROTO_FRAGMENT = 0x2c + IPPROTO_GGP = 0x3 + IPPROTO_GIF = 0x8c + IPPROTO_GRE = 0x2f + IPPROTO_HOPOPTS = 0x0 + IPPROTO_ICMP = 0x1 + IPPROTO_ICMPV6 = 0x3a + IPPROTO_IDP = 0x16 + IPPROTO_IGMP = 0x2 + IPPROTO_IP = 0x0 + IPPROTO_IPIP = 0x4 + IPPROTO_IPV6 = 0x29 + IPPROTO_LOCAL = 0x3f + IPPROTO_MAX = 0x100 + IPPROTO_MH = 0x87 + IPPROTO_NONE = 0x3b + IPPROTO_PUP = 0xc + IPPROTO_QOS = 0x2d + IPPROTO_RAW = 0xff + IPPROTO_ROUTING = 0x2b + IPPROTO_RSVP = 0x2e + IPPROTO_SCTP = 0x84 + IPPROTO_TCP = 0x6 + IPPROTO_TP = 0x1d + IPPROTO_UDP = 0x11 + IPV6_ADDRFORM = 0x16 + IPV6_ADDR_PREFERENCES = 0x4a + IPV6_ADD_MEMBERSHIP = 0xc + IPV6_AIXRAWSOCKET = 0x39 + IPV6_CHECKSUM = 0x27 + IPV6_DONTFRAG = 0x2d + IPV6_DROP_MEMBERSHIP = 0xd + IPV6_DSTOPTS = 0x36 + IPV6_FLOWINFO_FLOWLABEL = 0xffffff + IPV6_FLOWINFO_PRIFLOW = 0xfffffff + IPV6_FLOWINFO_PRIORITY = 0xf000000 + IPV6_FLOWINFO_SRFLAG = 0x10000000 + IPV6_FLOWINFO_VERSION = 0xf0000000 + IPV6_HOPLIMIT = 0x28 + IPV6_HOPOPTS = 0x34 + IPV6_JOIN_GROUP = 0xc + IPV6_LEAVE_GROUP = 0xd + IPV6_MIPDSTOPTS = 0x36 + IPV6_MULTICAST_HOPS = 0xa + IPV6_MULTICAST_IF = 0x9 + IPV6_MULTICAST_LOOP = 0xb + IPV6_NEXTHOP = 0x30 + IPV6_NOPROBE = 0x1c + IPV6_PATHMTU = 0x2e + IPV6_PKTINFO = 0x21 + IPV6_PKTOPTIONS = 0x24 + IPV6_PRIORITY_10 = 0xa000000 + IPV6_PRIORITY_11 = 0xb000000 + IPV6_PRIORITY_12 = 0xc000000 + IPV6_PRIORITY_13 = 0xd000000 + IPV6_PRIORITY_14 = 0xe000000 + IPV6_PRIORITY_15 = 0xf000000 + IPV6_PRIORITY_8 = 0x8000000 + IPV6_PRIORITY_9 = 0x9000000 + IPV6_PRIORITY_BULK = 0x4000000 + IPV6_PRIORITY_CONTROL = 0x7000000 + IPV6_PRIORITY_FILLER = 0x1000000 + IPV6_PRIORITY_INTERACTIVE = 0x6000000 + IPV6_PRIORITY_RESERVED1 = 0x3000000 + IPV6_PRIORITY_RESERVED2 = 0x5000000 + IPV6_PRIORITY_UNATTENDED = 0x2000000 + IPV6_PRIORITY_UNCHARACTERIZED = 0x0 + IPV6_RECVDSTOPTS = 0x38 + IPV6_RECVHOPLIMIT = 0x29 + IPV6_RECVHOPOPTS = 0x35 + IPV6_RECVHOPS = 0x22 + IPV6_RECVIF = 0x1e + IPV6_RECVPATHMTU = 0x2f + IPV6_RECVPKTINFO = 0x23 + IPV6_RECVRTHDR = 0x33 + IPV6_RECVSRCRT = 0x1d + IPV6_RECVTCLASS = 0x2a + IPV6_RTHDR = 0x32 + IPV6_RTHDRDSTOPTS = 0x37 + IPV6_RTHDR_TYPE_0 = 0x0 + IPV6_RTHDR_TYPE_2 = 0x2 + IPV6_SENDIF = 0x1f + IPV6_SRFLAG_LOOSE = 0x0 + IPV6_SRFLAG_STRICT = 0x10000000 + IPV6_TCLASS = 0x2b + IPV6_TOKEN_LENGTH = 0x40 + IPV6_UNICAST_HOPS = 0x4 + IPV6_USE_MIN_MTU = 0x2c + IPV6_V6ONLY = 0x25 + IPV6_VERSION = 0x60000000 + IP_ADDRFORM = 0x16 + IP_ADD_MEMBERSHIP = 0xc + IP_ADD_SOURCE_MEMBERSHIP = 0x3c + IP_BLOCK_SOURCE = 0x3a + IP_BROADCAST_IF = 0x10 + IP_CACHE_LINE_SIZE = 0x80 + IP_DEFAULT_MULTICAST_LOOP = 0x1 + IP_DEFAULT_MULTICAST_TTL = 0x1 + IP_DF = 0x4000 + IP_DHCPMODE = 0x11 + IP_DONTFRAG = 0x19 + IP_DROP_MEMBERSHIP = 0xd + IP_DROP_SOURCE_MEMBERSHIP = 0x3d + IP_FINDPMTU = 0x1a + IP_HDRINCL = 0x2 + IP_INC_MEMBERSHIPS = 0x14 + IP_INIT_MEMBERSHIP = 0x14 + IP_MAXPACKET = 0xffff + IP_MF = 0x2000 + IP_MSS = 0x240 + IP_MULTICAST_HOPS = 0xa + IP_MULTICAST_IF = 0x9 + IP_MULTICAST_LOOP = 0xb + IP_MULTICAST_TTL = 0xa + IP_OPT = 0x1b + IP_OPTIONS = 0x1 + IP_PMTUAGE = 0x1b + IP_RECVDSTADDR = 0x7 + IP_RECVIF = 0x14 + IP_RECVIFINFO = 0xf + IP_RECVINTERFACE = 0x20 + IP_RECVMACHDR = 0xe + IP_RECVOPTS = 0x5 + IP_RECVRETOPTS = 0x6 + IP_RECVTTL = 0x22 + IP_RETOPTS = 0x8 + IP_SOURCE_FILTER = 0x48 + IP_TOS = 0x3 + IP_TTL = 0x4 + IP_UNBLOCK_SOURCE = 0x3b + IP_UNICAST_HOPS = 0x4 + I_FLUSH = 0x20005305 + LNOFLSH = 0x8000 + LOCK_EX = 0x2 + LOCK_NB = 0x4 + LOCK_SH = 0x1 + LOCK_UN = 0x8 + MADV_DONTNEED = 0x4 + MADV_NORMAL = 0x0 + MADV_RANDOM = 0x1 + MADV_SEQUENTIAL = 0x2 + MADV_SPACEAVAIL = 0x5 + MADV_WILLNEED = 0x3 + MAP_ANON = 0x10 + MAP_ANONYMOUS = 0x10 + MAP_FILE = 0x0 + MAP_FIXED = 0x100 + MAP_PRIVATE = 0x2 + MAP_SHARED = 0x1 + MAP_TYPE = 0xf0 + MAP_VARIABLE = 0x0 + MCL_CURRENT = 0x100 + MCL_FUTURE = 0x200 + MSG_ANY = 0x4 + MSG_ARGEXT = 0x400 + MSG_BAND = 0x2 + MSG_COMPAT = 0x8000 + MSG_CTRUNC = 0x20 + MSG_DONTROUTE = 0x4 + MSG_EOR = 0x8 + MSG_HIPRI = 0x1 + MSG_MAXIOVLEN = 0x10 + MSG_MPEG2 = 0x80 + MSG_NONBLOCK = 0x4000 + MSG_NOSIGNAL = 0x100 + MSG_OOB = 0x1 + MSG_PEEK = 0x2 + MSG_TRUNC = 0x10 + MSG_WAITALL = 0x40 + MSG_WAITFORONE = 0x200 + MS_ASYNC = 0x10 + MS_EINTR = 0x80 + MS_INVALIDATE = 0x40 + MS_PER_SEC = 0x3e8 + MS_SYNC = 0x20 + NOFLUSH = 0x80000000 + O_ACCMODE = 0x23 + O_APPEND = 0x8 + O_CIO = 0x80 + O_CIOR = 0x800000000 + O_CLOEXEC = 0x800000 + O_CREAT = 0x100 + O_DEFER = 0x2000 + O_DELAY = 0x4000 + O_DIRECT = 0x8000000 + O_DIRECTORY = 0x80000 + O_DSYNC = 0x400000 + O_EFSOFF = 0x400000000 + O_EFSON = 0x200000000 + O_EXCL = 0x400 + O_EXEC = 0x20 + O_LARGEFILE = 0x4000000 + O_NDELAY = 0x8000 + O_NOCACHE = 0x100000 + O_NOCTTY = 0x800 + O_NOFOLLOW = 0x1000000 + O_NONBLOCK = 0x4 + O_NONE = 0x3 + O_NSHARE = 0x10000 + O_RAW = 0x100000000 + O_RDONLY = 0x0 + O_RDWR = 0x2 + O_RSHARE = 0x1000 + O_RSYNC = 0x200000 + O_SEARCH = 0x20 + O_SNAPSHOT = 0x40 + O_SYNC = 0x10 + O_TRUNC = 0x200 + O_TTY_INIT = 0x0 + O_WRONLY = 0x1 + PENDIN = 0x20000000 + PRIO_PGRP = 0x1 + PRIO_PROCESS = 0x0 + PRIO_USER = 0x2 + PROT_EXEC = 0x4 + PROT_NONE = 0x0 + PROT_READ = 0x1 + PROT_WRITE = 0x2 + PR_64BIT = 0x20 + PR_ADDR = 0x2 + PR_ARGEXT = 0x400 + PR_ATOMIC = 0x1 + PR_CONNREQUIRED = 0x4 + PR_FASTHZ = 0x5 + PR_INP = 0x40 + PR_INTRLEVEL = 0x8000 + PR_MLS = 0x100 + PR_MLS_1_LABEL = 0x200 + PR_NOEOR = 0x4000 + PR_RIGHTS = 0x10 + PR_SLOWHZ = 0x2 + PR_WANTRCVD = 0x8 + PT_ATTACH = 0x1e + PT_CLEAR = 0x26 + PT_COMMAND_MAX = 0x45 + PT_CONTINUE = 0x7 + PT_DETACH = 0x1f + PT_GET_UKEY = 0x40 + PT_KILL = 0x8 + PT_LDINFO = 0x22 + PT_LDXINFO = 0x27 + PT_MULTI = 0x23 + PT_NEXT = 0x24 + PT_QUERY = 0x28 + PT_READ_BLOCK = 0x11 + PT_READ_D = 0x2 + PT_READ_FPR = 0xc + PT_READ_GPR = 0xb + PT_READ_I = 0x1 + PT_REATT = 0x21 + PT_REGSET = 0x20 + PT_SET = 0x25 + PT_STEP = 0x9 + PT_TRACE_ME = 0x0 + PT_WATCH = 0x29 + PT_WRITE_BLOCK = 0x13 + PT_WRITE_D = 0x5 + PT_WRITE_FPR = 0xf + PT_WRITE_GPR = 0xe + PT_WRITE_I = 0x4 + RLIMIT_AS = 0x6 + RLIMIT_CORE = 0x4 + RLIMIT_CPU = 0x0 + RLIMIT_DATA = 0x2 + RLIMIT_FSIZE = 0x1 + RLIMIT_NOFILE = 0x7 + RLIMIT_STACK = 0x3 + RLIM_INFINITY = 0x7fffffffffffffff + RTAX_AUTHOR = 0x6 + RTAX_BRD = 0x7 + RTAX_DST = 0x0 + RTAX_GATEWAY = 0x1 + RTAX_GENMASK = 0x3 + RTAX_IFA = 0x5 + RTAX_IFP = 0x4 + RTAX_MAX = 0x8 + RTAX_NETMASK = 0x2 + RTA_AUTHOR = 0x40 + RTA_BRD = 0x80 + RTA_DOWNSTREAM = 0x100 + RTA_DST = 0x1 + RTA_GATEWAY = 0x2 + RTA_GENMASK = 0x8 + RTA_IFA = 0x20 + RTA_IFP = 0x10 + RTA_NETMASK = 0x4 + RTF_ACTIVE_DGD = 0x1000000 + RTF_BCE = 0x80000 + RTF_BLACKHOLE = 0x1000 + RTF_BROADCAST = 0x400000 + RTF_BUL = 0x2000 + RTF_CLONE = 0x10000 + RTF_CLONED = 0x20000 + RTF_CLONING = 0x100 + RTF_DONE = 0x40 + RTF_DYNAMIC = 0x10 + RTF_FREE_IN_PROG = 0x4000000 + RTF_GATEWAY = 0x2 + RTF_HOST = 0x4 + RTF_LLINFO = 0x400 + RTF_LOCAL = 0x200000 + RTF_MASK = 0x80 + RTF_MODIFIED = 0x20 + RTF_MULTICAST = 0x800000 + RTF_PERMANENT6 = 0x8000000 + RTF_PINNED = 0x100000 + RTF_PROTO1 = 0x8000 + RTF_PROTO2 = 0x4000 + RTF_PROTO3 = 0x40000 + RTF_REJECT = 0x8 + RTF_SMALLMTU = 0x40000 + RTF_STATIC = 0x800 + RTF_STOPSRCH = 0x2000000 + RTF_UNREACHABLE = 0x10000000 + RTF_UP = 0x1 + RTF_XRESOLVE = 0x200 + RTM_ADD = 0x1 + RTM_CHANGE = 0x3 + RTM_DELADDR = 0xd + RTM_DELETE = 0x2 + RTM_EXPIRE = 0xf + RTM_GET = 0x4 + RTM_GETNEXT = 0x11 + RTM_IFINFO = 0xe + RTM_LOCK = 0x8 + RTM_LOSING = 0x5 + RTM_MISS = 0x7 + RTM_NEWADDR = 0xc + RTM_OLDADD = 0x9 + RTM_OLDDEL = 0xa + RTM_REDIRECT = 0x6 + RTM_RESOLVE = 0xb + RTM_RTLOST = 0x10 + RTM_RTTUNIT = 0xf4240 + RTM_SAMEADDR = 0x12 + RTM_SET = 0x13 + RTM_VERSION = 0x2 + RTM_VERSION_GR = 0x4 + RTM_VERSION_GR_COMPAT = 0x3 + RTM_VERSION_POLICY = 0x5 + RTM_VERSION_POLICY_EXT = 0x6 + RTM_VERSION_POLICY_PRFN = 0x7 + RTV_EXPIRE = 0x4 + RTV_HOPCOUNT = 0x2 + RTV_MTU = 0x1 + RTV_RPIPE = 0x8 + RTV_RTT = 0x40 + RTV_RTTVAR = 0x80 + RTV_SPIPE = 0x10 + RTV_SSTHRESH = 0x20 + RUSAGE_CHILDREN = -0x1 + RUSAGE_SELF = 0x0 + RUSAGE_THREAD = 0x1 + SCM_RIGHTS = 0x1 + SHUT_RD = 0x0 + SHUT_RDWR = 0x2 + SHUT_WR = 0x1 + SIGQUEUE_MAX = 0x20 + SIOCADDIFVIPA = 0x20006942 + SIOCADDMTU = -0x7ffb9690 + SIOCADDMULTI = -0x7fdf96cf + SIOCADDNETID = -0x7fd796a9 + SIOCADDRT = -0x7fc78df6 + SIOCAIFADDR = -0x7fbf96e6 + SIOCATMARK = 0x40047307 + SIOCDARP = -0x7fb396e0 + SIOCDELIFVIPA = 0x20006943 + SIOCDELMTU = -0x7ffb968f + SIOCDELMULTI = -0x7fdf96ce + SIOCDELPMTU = -0x7fd78ff6 + SIOCDELRT = -0x7fc78df5 + SIOCDIFADDR = -0x7fd796e7 + SIOCDNETOPT = -0x3ffe9680 + SIOCDX25XLATE = -0x7fd7969b + SIOCFIFADDR = -0x7fdf966d + SIOCGARP = -0x3fb396da + SIOCGETMTUS = 0x2000696f + SIOCGETSGCNT = -0x3feb8acc + SIOCGETVIFCNT = -0x3feb8acd + SIOCGHIWAT = 0x40047301 + SIOCGIFADDR = -0x3fd796df + SIOCGIFADDRS = 0x2000698c + SIOCGIFBAUDRATE = -0x3fd79693 + SIOCGIFBRDADDR = -0x3fd796dd + SIOCGIFCONF = -0x3fef96bb + SIOCGIFCONFGLOB = -0x3fef9670 + SIOCGIFDSTADDR = -0x3fd796de + SIOCGIFFLAGS = -0x3fd796ef + SIOCGIFGIDLIST = 0x20006968 + SIOCGIFHWADDR = -0x3fab966b + SIOCGIFMETRIC = -0x3fd796e9 + SIOCGIFMTU = -0x3fd796aa + SIOCGIFNETMASK = -0x3fd796db + SIOCGIFOPTIONS = -0x3fd796d6 + SIOCGISNO = -0x3fd79695 + SIOCGLOADF = -0x3ffb967e + SIOCGLOWAT = 0x40047303 + SIOCGNETOPT = -0x3ffe96a5 + SIOCGNETOPT1 = -0x3fdf967f + SIOCGNMTUS = 0x2000696e + SIOCGPGRP = 0x40047309 + SIOCGSIZIFCONF = 0x4004696a + SIOCGSRCFILTER = -0x3fe796cb + SIOCGTUNEPHASE = -0x3ffb9676 + SIOCGX25XLATE = -0x3fd7969c + SIOCIFATTACH = -0x7fdf9699 + SIOCIFDETACH = -0x7fdf969a + SIOCIFGETPKEY = -0x7fdf969b + SIOCIF_ATM_DARP = -0x7fdf9683 + SIOCIF_ATM_DUMPARP = -0x7fdf9685 + SIOCIF_ATM_GARP = -0x7fdf9682 + SIOCIF_ATM_IDLE = -0x7fdf9686 + SIOCIF_ATM_SARP = -0x7fdf9681 + SIOCIF_ATM_SNMPARP = -0x7fdf9687 + SIOCIF_ATM_SVC = -0x7fdf9684 + SIOCIF_ATM_UBR = -0x7fdf9688 + SIOCIF_DEVHEALTH = -0x7ffb966c + SIOCIF_IB_ARP_INCOMP = -0x7fdf9677 + SIOCIF_IB_ARP_TIMER = -0x7fdf9678 + SIOCIF_IB_CLEAR_PINFO = -0x3fdf966f + SIOCIF_IB_DEL_ARP = -0x7fdf967f + SIOCIF_IB_DEL_PINFO = -0x3fdf9670 + SIOCIF_IB_DUMP_ARP = -0x7fdf9680 + SIOCIF_IB_GET_ARP = -0x7fdf967e + SIOCIF_IB_GET_INFO = -0x3f879675 + SIOCIF_IB_GET_STATS = -0x3f879672 + SIOCIF_IB_NOTIFY_ADDR_REM = -0x3f87966a + SIOCIF_IB_RESET_STATS = -0x3f879671 + SIOCIF_IB_RESIZE_CQ = -0x7fdf9679 + SIOCIF_IB_SET_ARP = -0x7fdf967d + SIOCIF_IB_SET_PKEY = -0x7fdf967c + SIOCIF_IB_SET_PORT = -0x7fdf967b + SIOCIF_IB_SET_QKEY = -0x7fdf9676 + SIOCIF_IB_SET_QSIZE = -0x7fdf967a + SIOCLISTIFVIPA = 0x20006944 + SIOCSARP = -0x7fb396e2 + SIOCSHIWAT = 0xffffffff80047300 + SIOCSIFADDR = -0x7fd796f4 + SIOCSIFADDRORI = -0x7fdb9673 + SIOCSIFBRDADDR = -0x7fd796ed + SIOCSIFDSTADDR = -0x7fd796f2 + SIOCSIFFLAGS = -0x7fd796f0 + SIOCSIFGIDLIST = 0x20006969 + SIOCSIFMETRIC = -0x7fd796e8 + SIOCSIFMTU = -0x7fd796a8 + SIOCSIFNETDUMP = -0x7fd796e4 + SIOCSIFNETMASK = -0x7fd796ea + SIOCSIFOPTIONS = -0x7fd796d7 + SIOCSIFSUBCHAN = -0x7fd796e5 + SIOCSISNO = -0x7fd79694 + SIOCSLOADF = -0x3ffb967d + SIOCSLOWAT = 0xffffffff80047302 + SIOCSNETOPT = -0x7ffe96a6 + SIOCSPGRP = 0xffffffff80047308 + SIOCSX25XLATE = -0x7fd7969d + SOCK_CONN_DGRAM = 0x6 + SOCK_DGRAM = 0x2 + SOCK_RAW = 0x3 + SOCK_RDM = 0x4 + SOCK_SEQPACKET = 0x5 + SOCK_STREAM = 0x1 + SOL_SOCKET = 0xffff + SOMAXCONN = 0x400 + SO_ACCEPTCONN = 0x2 + SO_AUDIT = 0x8000 + SO_BROADCAST = 0x20 + SO_CKSUMRECV = 0x800 + SO_DEBUG = 0x1 + SO_DONTROUTE = 0x10 + SO_ERROR = 0x1007 + SO_KEEPALIVE = 0x8 + SO_KERNACCEPT = 0x2000 + SO_LINGER = 0x80 + SO_NOMULTIPATH = 0x4000 + SO_NOREUSEADDR = 0x1000 + SO_OOBINLINE = 0x100 + SO_PEERID = 0x1009 + SO_RCVBUF = 0x1002 + SO_RCVLOWAT = 0x1004 + SO_RCVTIMEO = 0x1006 + SO_REUSEADDR = 0x4 + SO_REUSEPORT = 0x200 + SO_SNDBUF = 0x1001 + SO_SNDLOWAT = 0x1003 + SO_SNDTIMEO = 0x1005 + SO_TIMESTAMPNS = 0x100a + SO_TYPE = 0x1008 + SO_USELOOPBACK = 0x40 + SO_USE_IFBUFS = 0x400 + S_BANDURG = 0x400 + S_EMODFMT = 0x3c000000 + S_ENFMT = 0x400 + S_ERROR = 0x100 + S_HANGUP = 0x200 + S_HIPRI = 0x2 + S_ICRYPTO = 0x80000 + S_IEXEC = 0x40 + S_IFBLK = 0x6000 + S_IFCHR = 0x2000 + S_IFDIR = 0x4000 + S_IFIFO = 0x1000 + S_IFJOURNAL = 0x10000 + S_IFLNK = 0xa000 + S_IFMPX = 0x2200 + S_IFMT = 0xf000 + S_IFPDIR = 0x4000000 + S_IFPSDIR = 0x8000000 + S_IFPSSDIR = 0xc000000 + S_IFREG = 0x8000 + S_IFSOCK = 0xc000 + S_IFSYSEA = 0x30000000 + S_INPUT = 0x1 + S_IREAD = 0x100 + S_IRGRP = 0x20 + S_IROTH = 0x4 + S_IRUSR = 0x100 + S_IRWXG = 0x38 + S_IRWXO = 0x7 + S_IRWXU = 0x1c0 + S_ISGID = 0x400 + S_ISUID = 0x800 + S_ISVTX = 0x200 + S_ITCB = 0x1000000 + S_ITP = 0x800000 + S_IWGRP = 0x10 + S_IWOTH = 0x2 + S_IWRITE = 0x80 + S_IWUSR = 0x80 + S_IXACL = 0x2000000 + S_IXATTR = 0x40000 + S_IXGRP = 0x8 + S_IXINTERFACE = 0x100000 + S_IXMOD = 0x40000000 + S_IXOTH = 0x1 + S_IXUSR = 0x40 + S_MSG = 0x8 + S_OUTPUT = 0x4 + S_RDBAND = 0x20 + S_RDNORM = 0x10 + S_RESERVED1 = 0x20000 + S_RESERVED2 = 0x200000 + S_RESERVED3 = 0x400000 + S_RESERVED4 = 0x80000000 + S_RESFMT1 = 0x10000000 + S_RESFMT10 = 0x34000000 + S_RESFMT11 = 0x38000000 + S_RESFMT12 = 0x3c000000 + S_RESFMT2 = 0x14000000 + S_RESFMT3 = 0x18000000 + S_RESFMT4 = 0x1c000000 + S_RESFMT5 = 0x20000000 + S_RESFMT6 = 0x24000000 + S_RESFMT7 = 0x28000000 + S_RESFMT8 = 0x2c000000 + S_WRBAND = 0x80 + S_WRNORM = 0x40 + TCP_24DAYS_WORTH_OF_SLOWTICKS = 0x3f4800 + TCP_ACLADD = 0x23 + TCP_ACLBIND = 0x26 + TCP_ACLCLEAR = 0x22 + TCP_ACLDEL = 0x24 + TCP_ACLDENY = 0x8 + TCP_ACLFLUSH = 0x21 + TCP_ACLGID = 0x1 + TCP_ACLLS = 0x25 + TCP_ACLSUBNET = 0x4 + TCP_ACLUID = 0x2 + TCP_CWND_DF = 0x16 + TCP_CWND_IF = 0x15 + TCP_DELAY_ACK_FIN = 0x2 + TCP_DELAY_ACK_SYN = 0x1 + TCP_FASTNAME = 0x101080a + TCP_KEEPCNT = 0x13 + TCP_KEEPIDLE = 0x11 + TCP_KEEPINTVL = 0x12 + TCP_LSPRIV = 0x29 + TCP_LUID = 0x20 + TCP_MAXBURST = 0x8 + TCP_MAXDF = 0x64 + TCP_MAXIF = 0x64 + TCP_MAXSEG = 0x2 + TCP_MAXWIN = 0xffff + TCP_MAXWINDOWSCALE = 0xe + TCP_MAX_SACK = 0x4 + TCP_MSS = 0x5b4 + TCP_NODELAY = 0x1 + TCP_NODELAYACK = 0x14 + TCP_NOREDUCE_CWND_EXIT_FRXMT = 0x19 + TCP_NOREDUCE_CWND_IN_FRXMT = 0x18 + TCP_NOTENTER_SSTART = 0x17 + TCP_OPT = 0x19 + TCP_RFC1323 = 0x4 + TCP_SETPRIV = 0x27 + TCP_STDURG = 0x10 + TCP_TIMESTAMP_OPTLEN = 0xc + TCP_UNSETPRIV = 0x28 + TIOCCBRK = 0x2000747a + TIOCCDTR = 0x20007478 + TIOCCONS = 0xffffffff80047462 + TIOCEXCL = 0x2000740d + TIOCFLUSH = 0xffffffff80047410 + TIOCGETC = 0x40067412 + TIOCGETD = 0x40047400 + TIOCGETP = 0x40067408 + TIOCGLTC = 0x40067474 + TIOCGPGRP = 0x40047477 + TIOCGSID = 0x40047448 + TIOCGSIZE = 0x40087468 + TIOCGWINSZ = 0x40087468 + TIOCHPCL = 0x20007402 + TIOCLBIC = 0xffffffff8004747e + TIOCLBIS = 0xffffffff8004747f + TIOCLGET = 0x4004747c + TIOCLSET = 0xffffffff8004747d + TIOCMBIC = 0xffffffff8004746b + TIOCMBIS = 0xffffffff8004746c + TIOCMGET = 0x4004746a + TIOCMIWAIT = 0xffffffff80047464 + TIOCMODG = 0x40047403 + TIOCMODS = 0xffffffff80047404 + TIOCMSET = 0xffffffff8004746d + TIOCM_CAR = 0x40 + TIOCM_CD = 0x40 + TIOCM_CTS = 0x20 + TIOCM_DSR = 0x100 + TIOCM_DTR = 0x2 + TIOCM_LE = 0x1 + TIOCM_RI = 0x80 + TIOCM_RNG = 0x80 + TIOCM_RTS = 0x4 + TIOCM_SR = 0x10 + TIOCM_ST = 0x8 + TIOCNOTTY = 0x20007471 + TIOCNXCL = 0x2000740e + TIOCOUTQ = 0x40047473 + TIOCPKT = 0xffffffff80047470 + TIOCPKT_DATA = 0x0 + TIOCPKT_DOSTOP = 0x20 + TIOCPKT_FLUSHREAD = 0x1 + TIOCPKT_FLUSHWRITE = 0x2 + TIOCPKT_NOSTOP = 0x10 + TIOCPKT_START = 0x8 + TIOCPKT_STOP = 0x4 + TIOCREMOTE = 0xffffffff80047469 + TIOCSBRK = 0x2000747b + TIOCSDTR = 0x20007479 + TIOCSETC = 0xffffffff80067411 + TIOCSETD = 0xffffffff80047401 + TIOCSETN = 0xffffffff8006740a + TIOCSETP = 0xffffffff80067409 + TIOCSLTC = 0xffffffff80067475 + TIOCSPGRP = 0xffffffff80047476 + TIOCSSIZE = 0xffffffff80087467 + TIOCSTART = 0x2000746e + TIOCSTI = 0xffffffff80017472 + TIOCSTOP = 0x2000746f + TIOCSWINSZ = 0xffffffff80087467 + TIOCUCNTL = 0xffffffff80047466 + TOSTOP = 0x10000 + VTDELAY = 0x2000 + WPARSTART = 0x1 + WPARSTOP = 0x2 + WPARTTYNAME = "Global" + _FDATAFLUSH = 0x2000000000 +) + +// Errors +const ( + E2BIG = Errno(0x7) + EACCES = Errno(0xd) + EADDRINUSE = Errno(0x43) + EADDRNOTAVAIL = Errno(0x44) + EAFNOSUPPORT = Errno(0x42) + EAGAIN = Errno(0xb) + EALREADY = Errno(0x38) + EBADF = Errno(0x9) + EBADMSG = Errno(0x78) + EBUSY = Errno(0x10) + ECANCELED = Errno(0x75) + ECHILD = Errno(0xa) + ECHRNG = Errno(0x25) + ECLONEME = Errno(0x52) + ECONNABORTED = Errno(0x48) + ECONNREFUSED = Errno(0x4f) + ECONNRESET = Errno(0x49) + ECORRUPT = Errno(0x59) + EDEADLK = Errno(0x2d) + EDESTADDREQ = Errno(0x3a) + EDESTADDRREQ = Errno(0x3a) + EDIST = Errno(0x35) + EDOM = Errno(0x21) + EDQUOT = Errno(0x58) + EEXIST = Errno(0x11) + EFAULT = Errno(0xe) + EFBIG = Errno(0x1b) + EFORMAT = Errno(0x30) + EHOSTDOWN = Errno(0x50) + EHOSTUNREACH = Errno(0x51) + EIDRM = Errno(0x24) + EILSEQ = Errno(0x74) + EINPROGRESS = Errno(0x37) + EINTR = Errno(0x4) + EINVAL = Errno(0x16) + EIO = Errno(0x5) + EISCONN = Errno(0x4b) + EISDIR = Errno(0x15) + EL2HLT = Errno(0x2c) + EL2NSYNC = Errno(0x26) + EL3HLT = Errno(0x27) + EL3RST = Errno(0x28) + ELNRNG = Errno(0x29) + ELOOP = Errno(0x55) + EMEDIA = Errno(0x6e) + EMFILE = Errno(0x18) + EMLINK = Errno(0x1f) + EMSGSIZE = Errno(0x3b) + EMULTIHOP = Errno(0x7d) + ENAMETOOLONG = Errno(0x56) + ENETDOWN = Errno(0x45) + ENETRESET = Errno(0x47) + ENETUNREACH = Errno(0x46) + ENFILE = Errno(0x17) + ENOATTR = Errno(0x70) + ENOBUFS = Errno(0x4a) + ENOCONNECT = Errno(0x32) + ENOCSI = Errno(0x2b) + ENODATA = Errno(0x7a) + ENODEV = Errno(0x13) + ENOENT = Errno(0x2) + ENOEXEC = Errno(0x8) + ENOLCK = Errno(0x31) + ENOLINK = Errno(0x7e) + ENOMEM = Errno(0xc) + ENOMSG = Errno(0x23) + ENOPROTOOPT = Errno(0x3d) + ENOSPC = Errno(0x1c) + ENOSR = Errno(0x76) + ENOSTR = Errno(0x7b) + ENOSYS = Errno(0x6d) + ENOTBLK = Errno(0xf) + ENOTCONN = Errno(0x4c) + ENOTDIR = Errno(0x14) + ENOTEMPTY = Errno(0x11) + ENOTREADY = Errno(0x2e) + ENOTRECOVERABLE = Errno(0x5e) + ENOTRUST = Errno(0x72) + ENOTSOCK = Errno(0x39) + ENOTSUP = Errno(0x7c) + ENOTTY = Errno(0x19) + ENXIO = Errno(0x6) + EOPNOTSUPP = Errno(0x40) + EOVERFLOW = Errno(0x7f) + EOWNERDEAD = Errno(0x5f) + EPERM = Errno(0x1) + EPFNOSUPPORT = Errno(0x41) + EPIPE = Errno(0x20) + EPROCLIM = Errno(0x53) + EPROTO = Errno(0x79) + EPROTONOSUPPORT = Errno(0x3e) + EPROTOTYPE = Errno(0x3c) + ERANGE = Errno(0x22) + EREMOTE = Errno(0x5d) + ERESTART = Errno(0x52) + EROFS = Errno(0x1e) + ESAD = Errno(0x71) + ESHUTDOWN = Errno(0x4d) + ESOCKTNOSUPPORT = Errno(0x3f) + ESOFT = Errno(0x6f) + ESPIPE = Errno(0x1d) + ESRCH = Errno(0x3) + ESTALE = Errno(0x34) + ESYSERROR = Errno(0x5a) + ETIME = Errno(0x77) + ETIMEDOUT = Errno(0x4e) + ETOOMANYREFS = Errno(0x73) + ETXTBSY = Errno(0x1a) + EUNATCH = Errno(0x2a) + EUSERS = Errno(0x54) + EWOULDBLOCK = Errno(0xb) + EWRPROTECT = Errno(0x2f) + EXDEV = Errno(0x12) +) + +// Signals +const ( + SIGABRT = Signal(0x6) + SIGAIO = Signal(0x17) + SIGALRM = Signal(0xe) + SIGALRM1 = Signal(0x26) + SIGBUS = Signal(0xa) + SIGCAPI = Signal(0x31) + SIGCHLD = Signal(0x14) + SIGCLD = Signal(0x14) + SIGCONT = Signal(0x13) + SIGCPUFAIL = Signal(0x3b) + SIGDANGER = Signal(0x21) + SIGEMT = Signal(0x7) + SIGFPE = Signal(0x8) + SIGGRANT = Signal(0x3c) + SIGHUP = Signal(0x1) + SIGILL = Signal(0x4) + SIGINT = Signal(0x2) + SIGIO = Signal(0x17) + SIGIOINT = Signal(0x10) + SIGIOT = Signal(0x6) + SIGKAP = Signal(0x3c) + SIGKILL = Signal(0x9) + SIGLOST = Signal(0x6) + SIGMAX = Signal(0xff) + SIGMAX32 = Signal(0x3f) + SIGMAX64 = Signal(0xff) + SIGMIGRATE = Signal(0x23) + SIGMSG = Signal(0x1b) + SIGPIPE = Signal(0xd) + SIGPOLL = Signal(0x17) + SIGPRE = Signal(0x24) + SIGPROF = Signal(0x20) + SIGPTY = Signal(0x17) + SIGPWR = Signal(0x1d) + SIGQUIT = Signal(0x3) + SIGRECONFIG = Signal(0x3a) + SIGRETRACT = Signal(0x3d) + SIGSAK = Signal(0x3f) + SIGSEGV = Signal(0xb) + SIGSOUND = Signal(0x3e) + SIGSTOP = Signal(0x11) + SIGSYS = Signal(0xc) + SIGSYSERROR = Signal(0x30) + SIGTALRM = Signal(0x26) + SIGTERM = Signal(0xf) + SIGTRAP = Signal(0x5) + SIGTSTP = Signal(0x12) + SIGTTIN = Signal(0x15) + SIGTTOU = Signal(0x16) + SIGURG = Signal(0x10) + SIGUSR1 = Signal(0x1e) + SIGUSR2 = Signal(0x1f) + SIGVIRT = Signal(0x25) + SIGVTALRM = Signal(0x22) + SIGWAITING = Signal(0x27) + SIGWINCH = Signal(0x1c) + SIGXCPU = Signal(0x18) + SIGXFSZ = Signal(0x19) +) + +// Error table +var errors = [...]string{ + 1: "not owner", + 2: "no such file or directory", + 3: "no such process", + 4: "interrupted system call", + 5: "I/O error", + 6: "no such device or address", + 7: "arg list too long", + 8: "exec format error", + 9: "bad file number", + 10: "no child processes", + 11: "resource temporarily unavailable", + 12: "not enough space", + 13: "permission denied", + 14: "bad address", + 15: "block device required", + 16: "device busy", + 17: "file exists", + 18: "cross-device link", + 19: "no such device", + 20: "not a directory", + 21: "is a directory", + 22: "invalid argument", + 23: "file table overflow", + 24: "too many open files", + 25: "not a typewriter", + 26: "text file busy", + 27: "file too large", + 28: "no space left on device", + 29: "illegal seek", + 30: "read-only file system", + 31: "too many links", + 32: "broken pipe", + 33: "argument out of domain", + 34: "result too large", + 35: "no message of desired type", + 36: "identifier removed", + 37: "channel number out of range", + 38: "level 2 not synchronized", + 39: "level 3 halted", + 40: "level 3 reset", + 41: "link number out of range", + 42: "protocol driver not attached", + 43: "no CSI structure available", + 44: "level 2 halted", + 45: "deadlock condition if locked", + 46: "device not ready", + 47: "write-protected media", + 48: "unformatted or incompatible media", + 49: "no locks available", + 50: "cannot Establish Connection", + 52: "missing file or filesystem", + 53: "requests blocked by Administrator", + 55: "operation now in progress", + 56: "operation already in progress", + 57: "socket operation on non-socket", + 58: "destination address required", + 59: "message too long", + 60: "protocol wrong type for socket", + 61: "protocol not available", + 62: "protocol not supported", + 63: "socket type not supported", + 64: "operation not supported on socket", + 65: "protocol family not supported", + 66: "addr family not supported by protocol", + 67: "address already in use", + 68: "can't assign requested address", + 69: "network is down", + 70: "network is unreachable", + 71: "network dropped connection on reset", + 72: "software caused connection abort", + 73: "connection reset by peer", + 74: "no buffer space available", + 75: "socket is already connected", + 76: "socket is not connected", + 77: "can't send after socket shutdown", + 78: "connection timed out", + 79: "connection refused", + 80: "host is down", + 81: "no route to host", + 82: "restart the system call", + 83: "too many processes", + 84: "too many users", + 85: "too many levels of symbolic links", + 86: "file name too long", + 88: "disk quota exceeded", + 89: "invalid file system control data detected", + 90: "for future use ", + 93: "item is not local to host", + 94: "state not recoverable ", + 95: "previous owner died ", + 109: "function not implemented", + 110: "media surface error", + 111: "I/O completed, but needs relocation", + 112: "no attribute found", + 113: "security Authentication Denied", + 114: "not a Trusted Program", + 115: "too many references: can't splice", + 116: "invalid wide character", + 117: "asynchronous I/O cancelled", + 118: "out of STREAMS resources", + 119: "system call timed out", + 120: "next message has wrong type", + 121: "error in protocol", + 122: "no message on stream head read q", + 123: "fd not associated with a stream", + 124: "unsupported attribute value", + 125: "multihop is not allowed", + 126: "the server link has been severed", + 127: "value too large to be stored in data type", +} + +// Signal table +var signals = [...]string{ + 1: "hangup", + 2: "interrupt", + 3: "quit", + 4: "illegal instruction", + 5: "trace/BPT trap", + 6: "IOT/Abort trap", + 7: "EMT trap", + 8: "floating point exception", + 9: "killed", + 10: "bus error", + 11: "segmentation fault", + 12: "bad system call", + 13: "broken pipe", + 14: "alarm clock", + 15: "terminated", + 16: "urgent I/O condition", + 17: "stopped (signal)", + 18: "stopped", + 19: "continued", + 20: "child exited", + 21: "stopped (tty input)", + 22: "stopped (tty output)", + 23: "I/O possible/complete", + 24: "cputime limit exceeded", + 25: "filesize limit exceeded", + 27: "input device data", + 28: "window size changes", + 29: "power-failure", + 30: "user defined signal 1", + 31: "user defined signal 2", + 32: "profiling timer expired", + 33: "paging space low", + 34: "virtual timer expired", + 35: "signal 35", + 36: "signal 36", + 37: "signal 37", + 38: "signal 38", + 39: "signal 39", + 48: "signal 48", + 49: "signal 49", + 58: "signal 58", + 59: "CPU Failure Predicted", + 60: "monitor mode granted", + 61: "monitor mode retracted", + 62: "sound completed", + 63: "secure attention", + 255: "signal 255", +} diff --git a/src/syscall/zsyscall_aix_ppc64.go b/src/syscall/zsyscall_aix_ppc64.go new file mode 100644 index 0000000000..d9f009953f --- /dev/null +++ b/src/syscall/zsyscall_aix_ppc64.go @@ -0,0 +1,1167 @@ +// mksyscall_lib.pl -aix -tags aix,ppc64 syscall_aix.go syscall_aix_ppc64.go +// Code generated by the command above; DO NOT EDIT. + +// +build aix,ppc64 + +package syscall + +import "unsafe" + +//go:cgo_import_dynamic libc_fcntl fcntl "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_dup2 dup2 "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_pipe pipe "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_readlink readlink "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_utimes utimes "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_utimensat utimensat "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_unlinkat unlinkat "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_getcwd getcwd "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_getgroups getgroups "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_setgroups setgroups "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_getdirent getdirent "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_wait4 wait4 "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_bind bind "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_connect connect "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Getkerninfo getkerninfo "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_getsockopt getsockopt "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Listen listen "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_setsockopt setsockopt "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_socket socket "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_socketpair socketpair "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_getpeername getpeername "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_getsockname getsockname "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_recvfrom recvfrom "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_sendto sendto "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Shutdown shutdown "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_recvmsg recvmsg "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_sendmsg sendmsg "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_accept accept "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Openat openat "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_ptrace64 ptrace64 "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Acct acct "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Chdir chdir "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Chmod chmod "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Chown chown "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Close close "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Dup dup "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Faccessat faccessat "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Fchdir fchdir "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Fchmod fchmod "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Fchmodat fchmodat "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Fchown fchown "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Fchownat fchownat "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Fpathconf fpathconf "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Fstat fstat "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Fstatfs fstatfs "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Ftruncate ftruncate "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Fsync fsync "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Getgid getgid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Getpid getpid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Geteuid geteuid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Getegid getegid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Getppid getppid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Getrlimit getrlimit "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Getuid getuid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Kill kill "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Lchown lchown "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Link link "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Lstat lstat "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Mkdir mkdir "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Mkdirat mkdirat "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Mknodat mknodat "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Open open "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Pread pread "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Pwrite pwrite "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_read read "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Reboot reboot "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Rename rename "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Renameat renameat "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Rmdir rmdir "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_lseek lseek "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Setegid setegid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Seteuid seteuid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Setgid setgid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Setpgid setpgid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Setregid setregid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Setreuid setreuid "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Stat stat "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Statfs statfs "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Symlink symlink "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Truncate truncate "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Umask umask "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Unlink unlink "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_Uname uname "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_write write "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_gettimeofday gettimeofday "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_mmap mmap "libc.a/shr_64.o" +//go:cgo_import_dynamic libc_munmap munmap "libc.a/shr_64.o" + +//go:linkname libc_fcntl libc_fcntl +//go:linkname libc_dup2 libc_dup2 +//go:linkname libc_pipe libc_pipe +//go:linkname libc_readlink libc_readlink +//go:linkname libc_utimes libc_utimes +//go:linkname libc_utimensat libc_utimensat +//go:linkname libc_unlinkat libc_unlinkat +//go:linkname libc_getcwd libc_getcwd +//go:linkname libc_getgroups libc_getgroups +//go:linkname libc_setgroups libc_setgroups +//go:linkname libc_getdirent libc_getdirent +//go:linkname libc_wait4 libc_wait4 +//go:linkname libc_bind libc_bind +//go:linkname libc_connect libc_connect +//go:linkname libc_Getkerninfo libc_Getkerninfo +//go:linkname libc_getsockopt libc_getsockopt +//go:linkname libc_Listen libc_Listen +//go:linkname libc_setsockopt libc_setsockopt +//go:linkname libc_socket libc_socket +//go:linkname libc_socketpair libc_socketpair +//go:linkname libc_getpeername libc_getpeername +//go:linkname libc_getsockname libc_getsockname +//go:linkname libc_recvfrom libc_recvfrom +//go:linkname libc_sendto libc_sendto +//go:linkname libc_Shutdown libc_Shutdown +//go:linkname libc_recvmsg libc_recvmsg +//go:linkname libc_sendmsg libc_sendmsg +//go:linkname libc_accept libc_accept +//go:linkname libc_Openat libc_Openat +//go:linkname libc_ptrace64 libc_ptrace64 +//go:linkname libc_Acct libc_Acct +//go:linkname libc_Chdir libc_Chdir +//go:linkname libc_Chmod libc_Chmod +//go:linkname libc_Chown libc_Chown +//go:linkname libc_Close libc_Close +//go:linkname libc_Dup libc_Dup +//go:linkname libc_Faccessat libc_Faccessat +//go:linkname libc_Fchdir libc_Fchdir +//go:linkname libc_Fchmod libc_Fchmod +//go:linkname libc_Fchmodat libc_Fchmodat +//go:linkname libc_Fchown libc_Fchown +//go:linkname libc_Fchownat libc_Fchownat +//go:linkname libc_Fpathconf libc_Fpathconf +//go:linkname libc_Fstat libc_Fstat +//go:linkname libc_Fstatfs libc_Fstatfs +//go:linkname libc_Ftruncate libc_Ftruncate +//go:linkname libc_Fsync libc_Fsync +//go:linkname libc_Getgid libc_Getgid +//go:linkname libc_Getpid libc_Getpid +//go:linkname libc_Geteuid libc_Geteuid +//go:linkname libc_Getegid libc_Getegid +//go:linkname libc_Getppid libc_Getppid +//go:linkname libc_Getrlimit libc_Getrlimit +//go:linkname libc_Getuid libc_Getuid +//go:linkname libc_Kill libc_Kill +//go:linkname libc_Lchown libc_Lchown +//go:linkname libc_Link libc_Link +//go:linkname libc_Lstat libc_Lstat +//go:linkname libc_Mkdir libc_Mkdir +//go:linkname libc_Mkdirat libc_Mkdirat +//go:linkname libc_Mknodat libc_Mknodat +//go:linkname libc_Open libc_Open +//go:linkname libc_Pread libc_Pread +//go:linkname libc_Pwrite libc_Pwrite +//go:linkname libc_read libc_read +//go:linkname libc_Reboot libc_Reboot +//go:linkname libc_Rename libc_Rename +//go:linkname libc_Renameat libc_Renameat +//go:linkname libc_Rmdir libc_Rmdir +//go:linkname libc_lseek libc_lseek +//go:linkname libc_Setegid libc_Setegid +//go:linkname libc_Seteuid libc_Seteuid +//go:linkname libc_Setgid libc_Setgid +//go:linkname libc_Setpgid libc_Setpgid +//go:linkname libc_Setregid libc_Setregid +//go:linkname libc_Setreuid libc_Setreuid +//go:linkname libc_Stat libc_Stat +//go:linkname libc_Statfs libc_Statfs +//go:linkname libc_Symlink libc_Symlink +//go:linkname libc_Truncate libc_Truncate +//go:linkname libc_Umask libc_Umask +//go:linkname libc_Unlink libc_Unlink +//go:linkname libc_Uname libc_Uname +//go:linkname libc_write libc_write +//go:linkname libc_gettimeofday libc_gettimeofday +//go:linkname libc_mmap libc_mmap +//go:linkname libc_munmap libc_munmap + +type libcFunc uintptr + +var ( + libc_fcntl, + libc_dup2, + libc_pipe, + libc_readlink, + libc_utimes, + libc_utimensat, + libc_unlinkat, + libc_getcwd, + libc_getgroups, + libc_setgroups, + libc_getdirent, + libc_wait4, + libc_bind, + libc_connect, + libc_Getkerninfo, + libc_getsockopt, + libc_Listen, + libc_setsockopt, + libc_socket, + libc_socketpair, + libc_getpeername, + libc_getsockname, + libc_recvfrom, + libc_sendto, + libc_Shutdown, + libc_recvmsg, + libc_sendmsg, + libc_accept, + libc_Openat, + libc_ptrace64, + libc_Acct, + libc_Chdir, + libc_Chmod, + libc_Chown, + libc_Close, + libc_Dup, + libc_Faccessat, + libc_Fchdir, + libc_Fchmod, + libc_Fchmodat, + libc_Fchown, + libc_Fchownat, + libc_Fpathconf, + libc_Fstat, + libc_Fstatfs, + libc_Ftruncate, + libc_Fsync, + libc_Getgid, + libc_Getpid, + libc_Geteuid, + libc_Getegid, + libc_Getppid, + libc_Getrlimit, + libc_Getuid, + libc_Kill, + libc_Lchown, + libc_Link, + libc_Lstat, + libc_Mkdir, + libc_Mkdirat, + libc_Mknodat, + libc_Open, + libc_Pread, + libc_Pwrite, + libc_read, + libc_Reboot, + libc_Rename, + libc_Renameat, + libc_Rmdir, + libc_lseek, + libc_Setegid, + libc_Seteuid, + libc_Setgid, + libc_Setpgid, + libc_Setregid, + libc_Setreuid, + libc_Stat, + libc_Statfs, + libc_Symlink, + libc_Truncate, + libc_Umask, + libc_Unlink, + libc_Uname, + libc_write, + libc_gettimeofday, + libc_mmap, + libc_munmap libcFunc +) + +func fcntl(fd int, cmd int, arg int) (val int, err error) { + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_fcntl)), 3, uintptr(fd), uintptr(cmd), uintptr(arg), 0, 0, 0) + val = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func dup2(old int, new int) (val int, err error) { + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_dup2)), 2, uintptr(old), uintptr(new), 0, 0, 0, 0) + val = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func pipe(p *[2]_C_int) (err error) { + _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_pipe)), 1, uintptr(unsafe.Pointer(p)), 0, 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func readlink(path string, buf []byte, bufSize uint64) (n int, err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + var _p1 *byte + if len(buf) > 0 { + _p1 = &buf[0] + } + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_readlink)), 4, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(len(buf)), uintptr(bufSize), 0, 0) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func utimes(path string, times *[2]Timeval) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_utimes)), 2, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(times)), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_utimensat)), 4, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(times)), uintptr(flag), 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func unlinkat(dirfd int, path string, flags int) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_unlinkat)), 3, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func getcwd(buf *byte, size uint64) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_getcwd)), 2, uintptr(unsafe.Pointer(buf)), uintptr(size), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func getgroups(ngid int, gid *_Gid_t) (n int, err error) { + r0, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_getgroups)), 2, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0, 0, 0, 0) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func setgroups(ngid int, gid *_Gid_t) (err error) { + _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_setgroups)), 2, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func getdirent(fd int, buf []byte) (n int, err error) { + var _p0 *byte + if len(buf) > 0 { + _p0 = &buf[0] + } + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_getdirent)), 3, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)), 0, 0, 0) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func wait4(pid Pid_t, status *_C_int, options int, rusage *Rusage) (wpid Pid_t, err error) { + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_wait4)), 4, uintptr(pid), uintptr(unsafe.Pointer(status)), uintptr(options), uintptr(unsafe.Pointer(rusage)), 0, 0) + wpid = Pid_t(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_bind)), 3, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_connect)), 3, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Getkerninfo(op int32, where uintptr, size uintptr, arg int64) (i int32, err error) { + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Getkerninfo)), 4, uintptr(op), uintptr(where), uintptr(size), uintptr(arg), 0, 0) + i = int32(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_getsockopt)), 5, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Listen(s int, backlog int) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Listen)), 2, uintptr(s), uintptr(backlog), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_setsockopt)), 5, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func socket(domain int, typ int, proto int) (fd int, err error) { + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_socket)), 3, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0) + fd = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) { + _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_socketpair)), 4, uintptr(domain), uintptr(typ), uintptr(proto), uintptr(unsafe.Pointer(fd)), 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { + _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_getpeername)), 3, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_getsockname)), 3, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) { + var _p0 *byte + if len(p) > 0 { + _p0 = &p[0] + } + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_recvfrom)), 6, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) { + var _p0 *byte + if len(buf) > 0 { + _p0 = &buf[0] + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_sendto)), 6, uintptr(s), uintptr(unsafe.Pointer(_p0)), uintptr(len(buf)), uintptr(flags), uintptr(to), uintptr(addrlen)) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Shutdown(s int, how int) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Shutdown)), 2, uintptr(s), uintptr(how), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) { + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_recvmsg)), 3, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) { + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_sendmsg)), 3, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) { + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_accept)), 3, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) + fd = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Openat)), 4, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags), uintptr(mode), 0, 0) + fd = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func ptrace64(request int, id int64, addr int64, data int, buff uintptr) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_ptrace64)), 5, uintptr(request), uintptr(id), uintptr(addr), uintptr(data), uintptr(buff), 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Acct(path string) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Acct)), 1, uintptr(unsafe.Pointer(_p0)), 0, 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Chdir(path string) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Chdir)), 1, uintptr(unsafe.Pointer(_p0)), 0, 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Chmod(path string, mode uint32) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Chmod)), 2, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Chown(path string, uid int, gid int) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Chown)), 3, uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid), 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Close(fd int) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Close)), 1, uintptr(fd), 0, 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Dup(fd int) (nfd int, err error) { + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Dup)), 1, uintptr(fd), 0, 0, 0, 0, 0) + nfd = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Faccessat)), 4, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Fchdir(fd int) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fchdir)), 1, uintptr(fd), 0, 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Fchmod(fd int, mode uint32) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fchmod)), 2, uintptr(fd), uintptr(mode), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fchmodat)), 4, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(flags), 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Fchown(fd int, uid int, gid int) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fchown)), 3, uintptr(fd), uintptr(uid), uintptr(gid), 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fchownat)), 5, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid), uintptr(flags), 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Fpathconf(fd int, name int) (val int, err error) { + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fpathconf)), 2, uintptr(fd), uintptr(name), 0, 0, 0, 0) + val = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Fstat(fd int, stat *Stat_t) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fstat)), 2, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Fstatfs(fd int, buf *Statfs_t) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fstatfs)), 2, uintptr(fd), uintptr(unsafe.Pointer(buf)), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Ftruncate(fd int, length int64) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Ftruncate)), 2, uintptr(fd), uintptr(length), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Fsync(fd int) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fsync)), 1, uintptr(fd), 0, 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Getgid() (gid int) { + r0, _, _ := rawSyscall6(uintptr(unsafe.Pointer(&libc_Getgid)), 0, 0, 0, 0, 0, 0, 0) + gid = int(r0) + return +} + +func Getpid() (pid int) { + r0, _, _ := rawSyscall6(uintptr(unsafe.Pointer(&libc_Getpid)), 0, 0, 0, 0, 0, 0, 0) + pid = int(r0) + return +} + +func Geteuid() (euid int) { + r0, _, _ := syscall6(uintptr(unsafe.Pointer(&libc_Geteuid)), 0, 0, 0, 0, 0, 0, 0) + euid = int(r0) + return +} + +func Getegid() (egid int) { + r0, _, _ := syscall6(uintptr(unsafe.Pointer(&libc_Getegid)), 0, 0, 0, 0, 0, 0, 0) + egid = int(r0) + return +} + +func Getppid() (ppid int) { + r0, _, _ := syscall6(uintptr(unsafe.Pointer(&libc_Getppid)), 0, 0, 0, 0, 0, 0, 0) + ppid = int(r0) + return +} + +func Getrlimit(which int, lim *Rlimit) (err error) { + _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Getrlimit)), 2, uintptr(which), uintptr(unsafe.Pointer(lim)), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Getuid() (uid int) { + r0, _, _ := rawSyscall6(uintptr(unsafe.Pointer(&libc_Getuid)), 0, 0, 0, 0, 0, 0, 0) + uid = int(r0) + return +} + +func Kill(pid int, signum Signal) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Kill)), 2, uintptr(pid), uintptr(signum), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Lchown(path string, uid int, gid int) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Lchown)), 3, uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid), 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Link(path string, link string) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + var _p1 *byte + _p1, err = BytePtrFromString(link) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Link)), 2, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Lstat(path string, stat *Stat_t) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Lstat)), 2, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Mkdir(path string, mode uint32) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Mkdir)), 2, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Mkdirat(dirfd int, path string, mode uint32) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Mkdirat)), 3, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Mknodat(dirfd int, path string, mode uint32, dev int) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Mknodat)), 4, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev), 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Open(path string, mode int, perm uint32) (fd int, err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Open)), 3, uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm), 0, 0, 0) + fd = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Pread(fd int, p []byte, offset int64) (n int, err error) { + var _p0 *byte + if len(p) > 0 { + _p0 = &p[0] + } + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Pread)), 4, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), uintptr(offset), 0, 0) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Pwrite(fd int, p []byte, offset int64) (n int, err error) { + var _p0 *byte + if len(p) > 0 { + _p0 = &p[0] + } + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Pwrite)), 4, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), uintptr(offset), 0, 0) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func read(fd int, p []byte) (n int, err error) { + var _p0 *byte + if len(p) > 0 { + _p0 = &p[0] + } + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_read)), 3, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), 0, 0, 0) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Reboot(how int) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Reboot)), 1, uintptr(how), 0, 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Rename(from string, to string) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(from) + if err != nil { + return + } + var _p1 *byte + _p1, err = BytePtrFromString(to) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Rename)), 2, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(oldpath) + if err != nil { + return + } + var _p1 *byte + _p1, err = BytePtrFromString(newpath) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Renameat)), 4, uintptr(olddirfd), uintptr(unsafe.Pointer(_p0)), uintptr(newdirfd), uintptr(unsafe.Pointer(_p1)), 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Rmdir(path string) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Rmdir)), 1, uintptr(unsafe.Pointer(_p0)), 0, 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_lseek)), 3, uintptr(fd), uintptr(offset), uintptr(whence), 0, 0, 0) + newoffset = int64(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Setegid(egid int) (err error) { + _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Setegid)), 1, uintptr(egid), 0, 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Seteuid(euid int) (err error) { + _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Seteuid)), 1, uintptr(euid), 0, 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Setgid(gid int) (err error) { + _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Setgid)), 1, uintptr(gid), 0, 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Setpgid(pid int, pgid int) (err error) { + _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Setpgid)), 2, uintptr(pid), uintptr(pgid), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Setregid(rgid int, egid int) (err error) { + _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Setregid)), 2, uintptr(rgid), uintptr(egid), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Setreuid(ruid int, euid int) (err error) { + _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Setreuid)), 2, uintptr(ruid), uintptr(euid), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Stat(path string, stat *Stat_t) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Stat)), 2, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(stat)), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Statfs(path string, buf *Statfs_t) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Statfs)), 2, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(buf)), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Symlink(path string, link string) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + var _p1 *byte + _p1, err = BytePtrFromString(link) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Symlink)), 2, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Truncate(path string, length int64) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Truncate)), 2, uintptr(unsafe.Pointer(_p0)), uintptr(length), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Umask(newmask int) (oldmask int) { + r0, _, _ := syscall6(uintptr(unsafe.Pointer(&libc_Umask)), 1, uintptr(newmask), 0, 0, 0, 0, 0) + oldmask = int(r0) + return +} + +func Unlink(path string) (err error) { + var _p0 *byte + _p0, err = BytePtrFromString(path) + if err != nil { + return + } + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Unlink)), 1, uintptr(unsafe.Pointer(_p0)), 0, 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func Uname(buf *Utsname) (err error) { + _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Uname)), 1, uintptr(unsafe.Pointer(buf)), 0, 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func write(fd int, p []byte) (n int, err error) { + var _p0 *byte + if len(p) > 0 { + _p0 = &p[0] + } + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_write)), 3, uintptr(fd), uintptr(unsafe.Pointer(_p0)), uintptr(len(p)), 0, 0, 0) + n = int(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func gettimeofday(tv *Timeval, tzp *Timezone) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_gettimeofday)), 2, uintptr(unsafe.Pointer(tv)), uintptr(unsafe.Pointer(tzp)), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) { + r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_mmap)), 6, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flag), uintptr(fd), uintptr(pos)) + ret = uintptr(r0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} + +func munmap(addr uintptr, length uintptr) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_munmap)), 2, uintptr(addr), uintptr(length), 0, 0, 0, 0) + if e1 != 0 { + err = errnoErr(e1) + } + return +} diff --git a/src/syscall/ztypes_aix_ppc64.go b/src/syscall/ztypes_aix_ppc64.go new file mode 100644 index 0000000000..4fbbe23134 --- /dev/null +++ b/src/syscall/ztypes_aix_ppc64.go @@ -0,0 +1,272 @@ +// Code generated by cmd/cgo -godefs; DO NOT EDIT. +// cgo -godefs types_aix.go | go run mkpost.go + +package syscall + +const ( + sizeofPtr = 0x8 + sizeofShort = 0x2 + sizeofInt = 0x4 + sizeofLong = 0x8 + sizeofLongLong = 0x8 + PathMax = 0x3ff +) + +type ( + _C_short int16 + _C_int int32 + _C_long int64 + _C_long_long int64 +) + +type Timespec struct { + Sec int64 + Nsec int64 +} + +type Timeval struct { + Sec int64 + Usec int32 + Pad_cgo_0 [4]byte +} + +type Timeval32 struct { + Sec int32 + Usec int32 +} + +type Timezone struct { + Minuteswest int32 + Dsttime int32 +} + +type Rusage struct { + Utime Timeval + Stime Timeval + Maxrss int64 + Ixrss int64 + Idrss int64 + Isrss int64 + Minflt int64 + Majflt int64 + Nswap int64 + Inblock int64 + Oublock int64 + Msgsnd int64 + Msgrcv int64 + Nsignals int64 + Nvcsw int64 + Nivcsw int64 +} + +type Rlimit struct { + Cur uint64 + Max uint64 +} + +type Pid_t int32 + +type _Gid_t uint32 + +type Flock_t struct { + Type int16 + Whence int16 + Sysid uint32 + Pid int32 + Vfs int32 + Start int64 + Len int64 +} + +type Stat_t struct { + Dev uint64 + Ino uint64 + Mode uint32 + Nlink int16 + Flag uint16 + Uid uint32 + Gid uint32 + Rdev uint64 + Ssize int32 + Pad_cgo_0 [4]byte + Atim StTimespec_t + Mtim StTimespec_t + Ctim StTimespec_t + Blksize int64 + Blocks int64 + Vfstype int32 + Vfs uint32 + Type uint32 + Gen uint32 + Reserved [9]uint32 + Padto_ll uint32 + Size int64 +} + +type Statfs_t struct { + Version int32 + Type int32 + Bsize uint64 + Blocks uint64 + Bfree uint64 + Bavail uint64 + Files uint64 + Ffree uint64 + Fsid Fsid64_t + Vfstype int32 + Pad_cgo_0 [4]byte + Fsize uint64 + Vfsnumber int32 + Vfsoff int32 + Vfslen int32 + Vfsvers int32 + Fname [32]uint8 + Fpack [32]uint8 + Name_max int32 + Pad_cgo_1 [4]byte +} + +type Fsid64_t struct { + Val [2]uint64 +} + +type StTimespec_t struct { + Sec int64 + Nsec int32 + Pad_cgo_0 [4]byte +} + +type Dirent struct { + Offset uint64 + Ino uint64 + Reclen uint16 + Namlen uint16 + Name [256]uint8 + Pad_cgo_0 [4]byte +} + +type RawSockaddrInet4 struct { + Len uint8 + Family uint8 + Port uint16 + Addr [4]byte /* in_addr */ + Zero [8]uint8 +} + +type RawSockaddrInet6 struct { + Len uint8 + Family uint8 + Port uint16 + Flowinfo uint32 + Addr [16]byte /* in6_addr */ + Scope_id uint32 +} + +type RawSockaddrUnix struct { + Len uint8 + Family uint8 + Path [1023]uint8 +} + +type RawSockaddr struct { + Len uint8 + Family uint8 + Data [14]uint8 +} + +type RawSockaddrAny struct { + Addr RawSockaddr + Pad [1012]uint8 +} + +type _Socklen uint32 + +type Cmsghdr struct { + Len uint32 + Level int32 + Type int32 +} + +type ICMPv6Filter struct { + Filt [8]uint32 +} + +type Iovec struct { + Base *byte + Len uint64 +} + +type IPMreq struct { + Multiaddr [4]byte /* in_addr */ + Interface [4]byte /* in_addr */ +} + +type IPv6Mreq struct { + Multiaddr [16]byte /* in6_addr */ + Interface uint32 +} + +type Linger struct { + Onoff int32 + Linger int32 +} + +type Msghdr struct { + Name *byte + Namelen uint32 + Pad_cgo_0 [4]byte + Iov *Iovec + Iovlen int32 + Pad_cgo_1 [4]byte + Control *byte + Controllen uint32 + Flags int32 +} + +const ( + SizeofSockaddrInet4 = 0x10 + SizeofSockaddrInet6 = 0x1c + SizeofSockaddrAny = 0x404 + SizeofSockaddrUnix = 0x401 + SizeofLinger = 0x8 + SizeofIPMreq = 0x8 + SizeofIPv6Mreq = 0x14 + SizeofMsghdr = 0x30 + SizeofCmsghdr = 0xc + SizeofICMPv6Filter = 0x20 +) + +const ( + PTRACE_TRACEME = 0x0 + PTRACE_CONT = 0x7 + PTRACE_KILL = 0x8 +) + +const ( + SizeofIfMsghdr = 0x10 +) + +type IfMsgHdr struct { + Msglen uint16 + Version uint8 + Type uint8 + Addrs int32 + Flags int32 + Index uint16 + Addrlen uint8 + Pad_cgo_0 [1]byte +} + +type Utsname struct { + Sysname [32]uint8 + Nodename [32]uint8 + Release [32]uint8 + Version [32]uint8 + Machine [32]uint8 +} + +const ( + _AT_FDCWD = -0x2 + _AT_REMOVEDIR = 0x1 + _AT_SYMLINK_NOFOLLOW = 0x1 +) From f776d51bf7fe90926f8b929aee65d802a9091d5e Mon Sep 17 00:00:00 2001 From: Lynn Boger Date: Wed, 26 Sep 2018 10:43:15 -0400 Subject: [PATCH 073/240] cmd/internal/obj/ppc64: generate float 0 more efficiently on ppc64x This change makes use of a VSX instruction to generate the float 0 value instead of generating a constant in memory and loading it from there. This uses 1 instruction instead of 2 and avoids a memory reference. in the +0 case, uses 2 instructions in the -0 case but avoids the memory reference. Since this is done in the assembler for ppc64x, an update has been made to the assembler test. Change-Id: Ief7dddcb057bfb602f78215f6947664e8c841464 Reviewed-on: https://go-review.googlesource.com/c/139420 Reviewed-by: Michael Munday --- src/cmd/asm/internal/asm/testdata/ppc64enc.s | 3 +++ src/cmd/internal/obj/ppc64/asm9.go | 22 ++++++++++++++++++++ src/cmd/internal/obj/ppc64/obj9.go | 11 ++++++---- 3 files changed, 32 insertions(+), 4 deletions(-) diff --git a/src/cmd/asm/internal/asm/testdata/ppc64enc.s b/src/cmd/asm/internal/asm/testdata/ppc64enc.s index 7ab1a578f8..0133a85b98 100644 --- a/src/cmd/asm/internal/asm/testdata/ppc64enc.s +++ b/src/cmd/asm/internal/asm/testdata/ppc64enc.s @@ -98,4 +98,7 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0 LDAR (R4),$0,R5 // 7ca020a8 LDAR (R3),R5 // 7ca018a8 + // float constants + FMOVD $(0.0), F1 // f0210cd0 + FMOVD $(-0.0), F1 // f0210cd0fc200850 RET diff --git a/src/cmd/internal/obj/ppc64/asm9.go b/src/cmd/internal/obj/ppc64/asm9.go index 756170bc55..66a77b308c 100644 --- a/src/cmd/internal/obj/ppc64/asm9.go +++ b/src/cmd/internal/obj/ppc64/asm9.go @@ -35,6 +35,7 @@ import ( "encoding/binary" "fmt" "log" + "math" "sort" ) @@ -342,6 +343,8 @@ var optab = []Optab{ {AFMOVD, C_LEXT, C_NONE, C_NONE, C_FREG, 36, 8, REGSB}, {AFMOVD, C_LAUTO, C_NONE, C_NONE, C_FREG, 36, 8, REGSP}, {AFMOVD, C_LOREG, C_NONE, C_NONE, C_FREG, 36, 8, REGZERO}, + {AFMOVD, C_ZCON, C_NONE, C_NONE, C_FREG, 24, 4, 0}, + {AFMOVD, C_ADDCON, C_NONE, C_NONE, C_FREG, 24, 8, 0}, {AFMOVD, C_ADDR, C_NONE, C_NONE, C_FREG, 75, 8, 0}, {AFMOVD, C_FREG, C_NONE, C_NONE, C_SEXT, 7, 4, REGSB}, {AFMOVD, C_FREG, C_NONE, C_NONE, C_SAUTO, 7, 4, REGSP}, @@ -829,6 +832,18 @@ func (c *ctxt9) aclass(a *obj.Addr) int { case obj.TYPE_TEXTSIZE: return C_TEXTSIZE + case obj.TYPE_FCONST: + // The only cases where FCONST will occur are with float64 +/- 0. + // All other float constants are generated in memory. + f64 := a.Val.(float64) + if f64 == 0 { + if math.Signbit(f64) { + return C_ADDCON + } + return C_ZCON + } + log.Fatalf("Unexpected nonzero FCONST operand %v", a) + case obj.TYPE_CONST, obj.TYPE_ADDR: switch a.Name { @@ -2763,6 +2778,13 @@ func (c *ctxt9) asmout(p *obj.Prog, o *Optab, out []uint32) { c.ctxt.Diag("%v is not supported", p) } + case 24: /* lfd fA,float64(0) -> xxlxor xsA,xsaA,xsaA + fneg for -0 */ + o1 = AOP_XX3I(c.oprrr(AXXLXOR), uint32(p.To.Reg), uint32(p.To.Reg), uint32(p.To.Reg), uint32(0)) + // This is needed for -0. + if o.size == 8 { + o2 = AOP_RRR(c.oprrr(AFNEG), uint32(p.To.Reg), 0, uint32(p.To.Reg)) + } + case 25: /* sld[.] $sh,rS,rA -> rldicr[.] $sh,rS,mask(0,63-sh),rA; srd[.] -> rldicl */ v := c.regoff(&p.From) diff --git a/src/cmd/internal/obj/ppc64/obj9.go b/src/cmd/internal/obj/ppc64/obj9.go index f42d675805..7a07b5058c 100644 --- a/src/cmd/internal/obj/ppc64/obj9.go +++ b/src/cmd/internal/obj/ppc64/obj9.go @@ -67,10 +67,13 @@ func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) { case AFMOVD: if p.From.Type == obj.TYPE_FCONST { f64 := p.From.Val.(float64) - p.From.Type = obj.TYPE_MEM - p.From.Sym = ctxt.Float64Sym(f64) - p.From.Name = obj.NAME_EXTERN - p.From.Offset = 0 + // Constant not needed in memory for float +/- 0 + if f64 != 0 { + p.From.Type = obj.TYPE_MEM + p.From.Sym = ctxt.Float64Sym(f64) + p.From.Name = obj.NAME_EXTERN + p.From.Offset = 0 + } } // Put >32-bit constants in memory and load them From 1c88ce5f7bae4698b39cb7dbbb200f59c5b22a91 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= Date: Fri, 28 Sep 2018 15:32:52 +0200 Subject: [PATCH 074/240] time: add AIX operating system This commit adds AIX operating system to time package for ppc64 architecture. Updates: #25893 Change-Id: I4fb6fb47eae7671bf4e22729d6d160f557083c44 Reviewed-on: https://go-review.googlesource.com/c/138721 Run-TryBot: Tobias Klauser TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/time/sys_unix.go | 2 +- src/time/zoneinfo_unix.go | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/src/time/sys_unix.go b/src/time/sys_unix.go index e064e0046c..f4756b18a6 100644 --- a/src/time/sys_unix.go +++ b/src/time/sys_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris package time diff --git a/src/time/zoneinfo_unix.go b/src/time/zoneinfo_unix.go index 682e24b566..fca8e5497b 100644 --- a/src/time/zoneinfo_unix.go +++ b/src/time/zoneinfo_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin,386 darwin,amd64 dragonfly freebsd js,wasm linux,!android nacl netbsd openbsd solaris +// +build aix darwin,386 darwin,amd64 dragonfly freebsd js,wasm linux,!android nacl netbsd openbsd solaris // Parse "zoneinfo" time zone file. // This is a fairly standard file format used on OS X, Linux, BSD, Sun, and others. From 29907b13db0455eded50263b4e37445045c82e6e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= Date: Fri, 28 Sep 2018 15:42:19 +0200 Subject: [PATCH 075/240] crypto: add AIX operating system This commit adds AIX operating system to crypto package for ppc64 architecture. Updates: #25893 Change-Id: I20047ff2fef0051b8b235ec15b064c4a95c2b9c3 Reviewed-on: https://go-review.googlesource.com/c/138722 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/crypto/rand/eagain.go | 2 +- src/crypto/rand/rand_unix.go | 2 +- src/crypto/x509/root_aix.go | 10 ++++++++++ src/crypto/x509/root_unix.go | 3 ++- 4 files changed, 14 insertions(+), 3 deletions(-) create mode 100644 src/crypto/x509/root_aix.go diff --git a/src/crypto/rand/eagain.go b/src/crypto/rand/eagain.go index 7ed2f47ea6..045d037d20 100644 --- a/src/crypto/rand/eagain.go +++ b/src/crypto/rand/eagain.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux nacl netbsd openbsd solaris package rand diff --git a/src/crypto/rand/rand_unix.go b/src/crypto/rand/rand_unix.go index d49f693746..f3091f51c5 100644 --- a/src/crypto/rand/rand_unix.go +++ b/src/crypto/rand/rand_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux nacl netbsd openbsd plan9 solaris +// +build aix darwin dragonfly freebsd linux nacl netbsd openbsd plan9 solaris // Unix cryptographically secure pseudorandom number // generator. diff --git a/src/crypto/x509/root_aix.go b/src/crypto/x509/root_aix.go new file mode 100644 index 0000000000..6d427739a4 --- /dev/null +++ b/src/crypto/x509/root_aix.go @@ -0,0 +1,10 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package x509 + +// Possible certificate files; stop after finding one. +var certFiles = []string{ + "/var/ssl/certs/ca-bundle.crt", +} diff --git a/src/crypto/x509/root_unix.go b/src/crypto/x509/root_unix.go index 8e7036234d..48de50b4ea 100644 --- a/src/crypto/x509/root_unix.go +++ b/src/crypto/x509/root_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris package x509 @@ -19,6 +19,7 @@ var certDirectories = []string{ "/usr/local/share/certs", // FreeBSD "/etc/pki/tls/certs", // Fedora/RHEL "/etc/openssl/certs", // NetBSD + "/var/ssl/certs", // AIX } const ( From 05581fcc5c100cc2efa58355af8665cb93fed758 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= Date: Fri, 28 Sep 2018 15:44:06 +0200 Subject: [PATCH 076/240] mime: add AIX operating system This commit adds AIX operating system to mime package for ppc64 architecture. Updates: #25893 Change-Id: I1b81a9204446c8c76ae24ea5c6fd33077c373ae4 Reviewed-on: https://go-review.googlesource.com/c/138723 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/mime/type_unix.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/mime/type_unix.go b/src/mime/type_unix.go index 6549c0f5e9..dfc1f88b2a 100644 --- a/src/mime/type_unix.go +++ b/src/mime/type_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris package mime From ceb0c371d9a535826497289ac7d0b206a59526e6 Mon Sep 17 00:00:00 2001 From: Keith Randall Date: Mon, 8 Oct 2018 17:46:45 -0700 Subject: [PATCH 077/240] cmd/compile: make []byte("...") more efficient Do []byte(string) conversions more efficiently when the string is a constant. Instead of calling stringtobyteslice, allocate just the space we need and encode the initialization directly. []byte("foo") rewrites to the following pseudocode: var s [3]byte // on heap or stack, depending on whether b escapes s = *(*[3]byte)(&"foo"[0]) // initialize s from the string b = s[:] which generates this assembly: 0x001d 00029 (tmp1.go:9) LEAQ type.[3]uint8(SB), AX 0x0024 00036 (tmp1.go:9) MOVQ AX, (SP) 0x0028 00040 (tmp1.go:9) CALL runtime.newobject(SB) 0x002d 00045 (tmp1.go:9) MOVQ 8(SP), AX 0x0032 00050 (tmp1.go:9) MOVBLZX go.string."foo"+2(SB), CX 0x0039 00057 (tmp1.go:9) MOVWLZX go.string."foo"(SB), DX 0x0040 00064 (tmp1.go:9) MOVW DX, (AX) 0x0043 00067 (tmp1.go:9) MOVB CL, 2(AX) // Then the slice is b = {AX, 3, 3} The generated code is still not optimal, as it still does load/store from read-only memory instead of constant stores. Next CL... Update #26498 Fixes #10170 Change-Id: I4b990b19f9a308f60c8f4f148934acffefe0a5bd Reviewed-on: https://go-review.googlesource.com/c/140698 Run-TryBot: Keith Randall TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/cmd/compile/internal/gc/esc.go | 3 +- src/cmd/compile/internal/gc/go.go | 12 +++++- src/cmd/compile/internal/gc/walk.go | 37 +++++++++++++++++-- .../compile/internal/ssa/gen/generic.rules | 2 +- .../compile/internal/ssa/rewritegeneric.go | 14 ++++--- test/codegen/strings.go | 7 ++++ 6 files changed, 61 insertions(+), 14 deletions(-) diff --git a/src/cmd/compile/internal/gc/esc.go b/src/cmd/compile/internal/gc/esc.go index eba66d9c67..5beb43d548 100644 --- a/src/cmd/compile/internal/gc/esc.go +++ b/src/cmd/compile/internal/gc/esc.go @@ -798,9 +798,8 @@ func (e *EscState) esc(n *Node, parent *Node) { // gathered here. if n.Esc != EscHeap && n.Type != nil && (n.Type.Width > maxStackVarSize || - (n.Op == ONEW || n.Op == OPTRLIT) && n.Type.Elem().Width >= 1<<16 || + (n.Op == ONEW || n.Op == OPTRLIT) && n.Type.Elem().Width >= maxImplicitStackVarSize || n.Op == OMAKESLICE && !isSmallMakeSlice(n)) { - // isSmallMakeSlice returns false for non-constant len/cap. // If that's the case, print a more accurate escape reason. var msgVerb, escapeMsg string diff --git a/src/cmd/compile/internal/gc/go.go b/src/cmd/compile/internal/gc/go.go index d8ab5eb39c..605afd6407 100644 --- a/src/cmd/compile/internal/gc/go.go +++ b/src/cmd/compile/internal/gc/go.go @@ -13,8 +13,18 @@ import ( ) const ( - BADWIDTH = types.BADWIDTH + BADWIDTH = types.BADWIDTH + + // maximum size variable which we will allocate on the stack. + // This limit is for explicit variable declarations like "var x T" or "x := ...". maxStackVarSize = 10 * 1024 * 1024 + + // maximum size of implicit variables that we will allocate on the stack. + // p := new(T) allocating T on the stack + // p := &T{} allocating T on the stack + // s := make([]T, n) allocating [n]T on the stack + // s := []byte("...") allocating [n]byte on the stack + maxImplicitStackVarSize = 64 * 1024 ) // isRuntimePkg reports whether p is package runtime. diff --git a/src/cmd/compile/internal/gc/walk.go b/src/cmd/compile/internal/gc/walk.go index 80fdc55b5d..c3201c1404 100644 --- a/src/cmd/compile/internal/gc/walk.go +++ b/src/cmd/compile/internal/gc/walk.go @@ -367,7 +367,7 @@ func isSmallMakeSlice(n *Node) bool { } t := n.Type - return smallintconst(l) && smallintconst(r) && (t.Elem().Width == 0 || r.Int64() < (1<<16)/t.Elem().Width) + return smallintconst(l) && smallintconst(r) && (t.Elem().Width == 0 || r.Int64() < maxImplicitStackVarSize/t.Elem().Width) } // walk the whole tree of the body of an @@ -1204,7 +1204,7 @@ opswitch: case ONEW: if n.Esc == EscNone { - if n.Type.Elem().Width >= 1<<16 { + if n.Type.Elem().Width >= maxImplicitStackVarSize { Fatalf("large ONEW with EscNone: %v", n) } r := temp(n.Type.Elem()) @@ -1593,8 +1593,36 @@ opswitch: n = mkcall("slicerunetostring", n.Type, init, a, n.Left) - // stringtoslicebyte(*32[byte], string) []byte; case OSTRARRAYBYTE: + s := n.Left + if Isconst(s, CTSTR) { + sc := s.Val().U.(string) + + // Allocate a [n]byte of the right size. + t := types.NewArray(types.Types[TUINT8], int64(len(sc))) + var a *Node + if n.Esc == EscNone && len(sc) <= maxImplicitStackVarSize { + a = nod(OADDR, temp(t), nil) + } else { + a = callnew(t) + } + p := temp(t.PtrTo()) // *[n]byte + init.Append(typecheck(nod(OAS, p, a), Etop)) + + // Copy from the static string data to the [n]byte. + if len(sc) > 0 { + as := nod(OAS, + nod(OIND, p, nil), + nod(OIND, convnop(nod(OSPTR, s, nil), t.PtrTo()), nil)) + init.Append(typecheck(as, Etop)) + } + + // Slice the [n]byte to a []byte. + n.Op = OSLICEARR + n.Left = p + n = walkexpr(n, init) + break + } a := nodnil() if n.Esc == EscNone { @@ -1604,7 +1632,8 @@ opswitch: a = nod(OADDR, temp(t), nil) } - n = mkcall("stringtoslicebyte", n.Type, init, a, conv(n.Left, types.Types[TSTRING])) + // stringtoslicebyte(*32[byte], string) []byte; + n = mkcall("stringtoslicebyte", n.Type, init, a, conv(s, types.Types[TSTRING])) case OSTRARRAYBYTETMP: // []byte(string) conversion that creates a slice diff --git a/src/cmd/compile/internal/ssa/gen/generic.rules b/src/cmd/compile/internal/ssa/gen/generic.rules index d490e32f3d..8d2691d29c 100644 --- a/src/cmd/compile/internal/ssa/gen/generic.rules +++ b/src/cmd/compile/internal/ssa/gen/generic.rules @@ -816,7 +816,7 @@ // Decomposing StringMake and lowering of StringPtr and StringLen // happens in a later pass, dec, so that these operations are available // to other passes for optimizations. -(StringPtr (StringMake (Const64 [c]) _)) -> (Const64 [c]) +(StringPtr (StringMake (Addr {s} base) _)) -> (Addr {s} base) (StringLen (StringMake _ (Const64 [c]))) -> (Const64 [c]) (ConstString {s}) && config.PtrSize == 4 && s.(string) == "" -> (StringMake (ConstNil) (Const32 [0])) diff --git a/src/cmd/compile/internal/ssa/rewritegeneric.go b/src/cmd/compile/internal/ssa/rewritegeneric.go index 2f239faa49..26341a9217 100644 --- a/src/cmd/compile/internal/ssa/rewritegeneric.go +++ b/src/cmd/compile/internal/ssa/rewritegeneric.go @@ -28748,9 +28748,9 @@ func rewriteValuegeneric_OpStringLen_0(v *Value) bool { return false } func rewriteValuegeneric_OpStringPtr_0(v *Value) bool { - // match: (StringPtr (StringMake (Const64 [c]) _)) + // match: (StringPtr (StringMake (Addr {s} base) _)) // cond: - // result: (Const64 [c]) + // result: (Addr {s} base) for { v_0 := v.Args[0] if v_0.Op != OpStringMake { @@ -28758,14 +28758,16 @@ func rewriteValuegeneric_OpStringPtr_0(v *Value) bool { } _ = v_0.Args[1] v_0_0 := v_0.Args[0] - if v_0_0.Op != OpConst64 { + if v_0_0.Op != OpAddr { break } t := v_0_0.Type - c := v_0_0.AuxInt - v.reset(OpConst64) + s := v_0_0.Aux + base := v_0_0.Args[0] + v.reset(OpAddr) v.Type = t - v.AuxInt = c + v.Aux = s + v.AddArg(base) return true } return false diff --git a/test/codegen/strings.go b/test/codegen/strings.go index ccb6bd4273..f4adfac0cc 100644 --- a/test/codegen/strings.go +++ b/test/codegen/strings.go @@ -13,3 +13,10 @@ func CountRunes(s string) int { // Issue #24923 // amd64:`.*countrunes` return len([]rune(s)) } + +func ToByteSlice() []byte { // Issue #24698 + // amd64:`LEAQ\ttype\.\[3\]uint8` + // amd64:`CALL\truntime\.newobject` + // amd64:-`.*runtime.stringtoslicebyte` + return []byte("foo") +} From 9ff11b026089791c4d2bc14c17647f3cb4f4aa22 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= Date: Fri, 28 Sep 2018 15:50:01 +0200 Subject: [PATCH 078/240] net: add AIX operating system This commit adds AIX operating system to net package for ppc64 architecture. Updates: #25893 Change-Id: I46bbc7b03931019beb969443cb3f9a756956c66c Reviewed-on: https://go-review.googlesource.com/c/138724 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/net/addrselect.go | 2 +- src/net/conf.go | 2 +- src/net/dial_unix_test.go | 2 +- src/net/dnsclient_unix.go | 2 +- src/net/dnsclient_unix_test.go | 2 +- src/net/dnsconfig_unix.go | 2 +- src/net/dnsconfig_unix_test.go | 2 +- src/net/error_posix.go | 2 +- src/net/error_unix.go | 2 +- src/net/fd_unix.go | 2 +- src/net/file_unix.go | 2 +- src/net/hook_unix.go | 2 +- src/net/interface_aix.go | 165 +++++++++++++++++++++++ src/net/internal/socktest/switch_unix.go | 2 +- src/net/internal/socktest/sys_unix.go | 2 +- src/net/iprawsock_posix.go | 2 +- src/net/ipsock_posix.go | 4 +- src/net/listen_test.go | 2 +- src/net/lookup_unix.go | 2 +- src/net/main_unix_test.go | 2 +- src/net/nss.go | 2 +- src/net/platform_test.go | 2 +- src/net/port_unix.go | 2 +- src/net/rawconn_unix_test.go | 2 +- src/net/sendfile_stub.go | 2 +- src/net/sock_posix.go | 2 +- src/net/sock_stub.go | 2 +- src/net/sockaddr_posix.go | 2 +- src/net/sockopt_aix.go | 38 ++++++ src/net/sockopt_posix.go | 2 +- src/net/sockoptip_bsdvar.go | 2 +- src/net/sockoptip_posix.go | 2 +- src/net/sys_cloexec.go | 2 +- src/net/tcpsock_posix.go | 2 +- src/net/tcpsockopt_posix.go | 2 +- src/net/tcpsockopt_unix.go | 2 +- src/net/udpsock_posix.go | 2 +- src/net/unixsock_posix.go | 2 +- 38 files changed, 240 insertions(+), 37 deletions(-) create mode 100644 src/net/interface_aix.go create mode 100644 src/net/sockopt_aix.go diff --git a/src/net/addrselect.go b/src/net/addrselect.go index 1ab9fc5326..7c0dfe261c 100644 --- a/src/net/addrselect.go +++ b/src/net/addrselect.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris // Minimal RFC 6724 address selection. diff --git a/src/net/conf.go b/src/net/conf.go index 127aba30cb..971b1a399a 100644 --- a/src/net/conf.go +++ b/src/net/conf.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris package net diff --git a/src/net/dial_unix_test.go b/src/net/dial_unix_test.go index 0adc10d0bd..3cfc9d81b8 100644 --- a/src/net/dial_unix_test.go +++ b/src/net/dial_unix_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris package net diff --git a/src/net/dnsclient_unix.go b/src/net/dnsclient_unix.go index 9a0b1d69a8..3b0293025d 100644 --- a/src/net/dnsclient_unix.go +++ b/src/net/dnsclient_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris // DNS client: see RFC 1035. // Has to be linked into package net for Dial. diff --git a/src/net/dnsclient_unix_test.go b/src/net/dnsclient_unix_test.go index 9482fc466f..7dccb6b8ec 100644 --- a/src/net/dnsclient_unix_test.go +++ b/src/net/dnsclient_unix_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris package net diff --git a/src/net/dnsconfig_unix.go b/src/net/dnsconfig_unix.go index 64c66f96b8..842d408e56 100644 --- a/src/net/dnsconfig_unix.go +++ b/src/net/dnsconfig_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris // Read system DNS config from /etc/resolv.conf diff --git a/src/net/dnsconfig_unix_test.go b/src/net/dnsconfig_unix_test.go index 37bdeb04c8..0797559d1a 100644 --- a/src/net/dnsconfig_unix_test.go +++ b/src/net/dnsconfig_unix_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris package net diff --git a/src/net/error_posix.go b/src/net/error_posix.go index 0000700809..70efa4c66f 100644 --- a/src/net/error_posix.go +++ b/src/net/error_posix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows package net diff --git a/src/net/error_unix.go b/src/net/error_unix.go index b5a5829eaa..e615330388 100644 --- a/src/net/error_unix.go +++ b/src/net/error_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js linux netbsd openbsd solaris package net diff --git a/src/net/fd_unix.go b/src/net/fd_unix.go index 055ecf0336..e7ab9a45fd 100644 --- a/src/net/fd_unix.go +++ b/src/net/fd_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux nacl netbsd openbsd solaris package net diff --git a/src/net/file_unix.go b/src/net/file_unix.go index 676798d693..452a079bfc 100644 --- a/src/net/file_unix.go +++ b/src/net/file_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris package net diff --git a/src/net/hook_unix.go b/src/net/hook_unix.go index d672bd01b0..a1568319f3 100644 --- a/src/net/hook_unix.go +++ b/src/net/hook_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris package net diff --git a/src/net/interface_aix.go b/src/net/interface_aix.go new file mode 100644 index 0000000000..8b70206206 --- /dev/null +++ b/src/net/interface_aix.go @@ -0,0 +1,165 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package net + +import ( + //"os" + "syscall" + "unsafe" +) + +type RawSockaddrDatalink struct { + Len uint8 + Family uint8 + Index uint16 + Type uint8 + Nlen uint8 + Alen uint8 + Slen uint8 + Data [120]byte +} + +const _KINFO_RT_IFLIST = (0x1 << 8) | 3 | (1 << 30) + +const _RTAX_NETMASK = 2 +const _RTAX_IFA = 5 +const _RTAX_MAX = 8 + +func getIfList() ([]byte, error) { + needed, err := syscall.Getkerninfo(_KINFO_RT_IFLIST, 0, 0, 0) + if err != nil { + return nil, nil // XXX + } + tab := make([]byte, needed) + _, err = syscall.Getkerninfo(_KINFO_RT_IFLIST, uintptr(unsafe.Pointer(&tab[0])), uintptr(unsafe.Pointer(&needed)), 0) + if err != nil { + return nil, nil // XXX + } + return tab[:needed], nil +} + +// If the ifindex is zero, interfaceTable returns mappings of all +// network interfaces. Otherwise it returns a mapping of a specific +// interface. +func interfaceTable(ifindex int) ([]Interface, error) { + tab, err := getIfList() + if err != nil { + return nil, err + } + + var ift []Interface + for len(tab) > 0 { + ifm := (*syscall.IfMsgHdr)(unsafe.Pointer(&tab[0])) + if ifm.Msglen == 0 { + break + } + if ifm.Type == syscall.RTM_IFINFO { + if ifindex == 0 || ifindex == int(ifm.Index) { + sdl := (*RawSockaddrDatalink)(unsafe.Pointer(&tab[syscall.SizeofIfMsghdr])) + + ifi := &Interface{Index: int(ifm.Index), Flags: linkFlags(ifm.Flags)} + ifi.Name = string(sdl.Data[:sdl.Nlen]) + ifi.HardwareAddr = sdl.Data[sdl.Nlen : sdl.Nlen+sdl.Alen] + /* XXX MTU? */ + ift = append(ift, *ifi) + if ifindex == int(ifm.Index) { + break + } + } + } + tab = tab[ifm.Msglen:] + } + + return ift, nil +} + +func linkFlags(rawFlags int32) Flags { + var f Flags + if rawFlags&syscall.IFF_UP != 0 { + f |= FlagUp + } + if rawFlags&syscall.IFF_BROADCAST != 0 { + f |= FlagBroadcast + } + if rawFlags&syscall.IFF_LOOPBACK != 0 { + f |= FlagLoopback + } + if rawFlags&syscall.IFF_POINTOPOINT != 0 { + f |= FlagPointToPoint + } + if rawFlags&syscall.IFF_MULTICAST != 0 { + f |= FlagMulticast + } + return f +} + +// If the ifi is nil, interfaceAddrTable returns addresses for all +// network interfaces. Otherwise it returns addresses for a specific +// interface. +func interfaceAddrTable(ifi *Interface) ([]Addr, error) { + tab, err := getIfList() + if err != nil { + return nil, err + } + + var ifat []Addr + for len(tab) > 0 { + ifm := (*syscall.IfMsgHdr)(unsafe.Pointer(&tab[0])) + if ifm.Msglen == 0 { + break + } + if ifm.Type == syscall.RTM_NEWADDR { + if ifi == nil || ifi.Index == int(ifm.Index) { + mask := ifm.Addrs + off := uint(syscall.SizeofIfMsghdr) + + var iprsa, nmrsa *syscall.RawSockaddr + for i := uint(0); i < _RTAX_MAX; i++ { + if mask&(1< Date: Wed, 10 Oct 2018 10:51:28 +0200 Subject: [PATCH 079/240] syscall: add marker comments to zsyscall_{aix,solaris}_*.go These marker comments are in every other zsyscall_*.go file generated by mksyscall.pl. Also add them to the files generated by mksyscall_libc.pl used for aix and solaris. Change-Id: I7fd125df3549d83c658bbe7424861c76c024f2e5 Reviewed-on: https://go-review.googlesource.com/c/141037 Run-TryBot: Tobias Klauser Reviewed-by: Ian Lance Taylor --- src/syscall/mksyscall_libc.pl | 5 + src/syscall/zsyscall_aix_ppc64.go | 176 +++++++++++++++++++++++++- src/syscall/zsyscall_solaris_amd64.go | 168 +++++++++++++++++++++++- 3 files changed, 347 insertions(+), 2 deletions(-) diff --git a/src/syscall/mksyscall_libc.pl b/src/syscall/mksyscall_libc.pl index 6f57bee79e..5ceedc812a 100755 --- a/src/syscall/mksyscall_libc.pl +++ b/src/syscall/mksyscall_libc.pl @@ -106,6 +106,11 @@ while(<>) { my @in = parseparamlist($in); my @out = parseparamlist($out); + # Try in vain to keep people from editing this file. + # The theory is that they jump into the middle of the file + # without reading the header. + $text .= "// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT\n\n"; + # So file name. if($aix) { if($modname eq "") { diff --git a/src/syscall/zsyscall_aix_ppc64.go b/src/syscall/zsyscall_aix_ppc64.go index d9f009953f..3ea11f8af3 100644 --- a/src/syscall/zsyscall_aix_ppc64.go +++ b/src/syscall/zsyscall_aix_ppc64.go @@ -1,4 +1,4 @@ -// mksyscall_lib.pl -aix -tags aix,ppc64 syscall_aix.go syscall_aix_ppc64.go +// mksyscall_libc.pl -aix -tags aix,ppc64 syscall_aix.go syscall_aix_ppc64.go // Code generated by the command above; DO NOT EDIT. // +build aix,ppc64 @@ -275,6 +275,8 @@ var ( libc_munmap libcFunc ) +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func fcntl(fd int, cmd int, arg int) (val int, err error) { r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_fcntl)), 3, uintptr(fd), uintptr(cmd), uintptr(arg), 0, 0, 0) val = int(r0) @@ -284,6 +286,8 @@ func fcntl(fd int, cmd int, arg int) (val int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func dup2(old int, new int) (val int, err error) { r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_dup2)), 2, uintptr(old), uintptr(new), 0, 0, 0, 0) val = int(r0) @@ -293,6 +297,8 @@ func dup2(old int, new int) (val int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func pipe(p *[2]_C_int) (err error) { _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_pipe)), 1, uintptr(unsafe.Pointer(p)), 0, 0, 0, 0, 0) if e1 != 0 { @@ -301,6 +307,8 @@ func pipe(p *[2]_C_int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func readlink(path string, buf []byte, bufSize uint64) (n int, err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -319,6 +327,8 @@ func readlink(path string, buf []byte, bufSize uint64) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func utimes(path string, times *[2]Timeval) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -332,6 +342,8 @@ func utimes(path string, times *[2]Timeval) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -345,6 +357,8 @@ func utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func unlinkat(dirfd int, path string, flags int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -358,6 +372,8 @@ func unlinkat(dirfd int, path string, flags int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func getcwd(buf *byte, size uint64) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_getcwd)), 2, uintptr(unsafe.Pointer(buf)), uintptr(size), 0, 0, 0, 0) if e1 != 0 { @@ -366,6 +382,8 @@ func getcwd(buf *byte, size uint64) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func getgroups(ngid int, gid *_Gid_t) (n int, err error) { r0, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_getgroups)), 2, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0, 0, 0, 0) n = int(r0) @@ -375,6 +393,8 @@ func getgroups(ngid int, gid *_Gid_t) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func setgroups(ngid int, gid *_Gid_t) (err error) { _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_setgroups)), 2, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0, 0, 0, 0) if e1 != 0 { @@ -383,6 +403,8 @@ func setgroups(ngid int, gid *_Gid_t) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func getdirent(fd int, buf []byte) (n int, err error) { var _p0 *byte if len(buf) > 0 { @@ -396,6 +418,8 @@ func getdirent(fd int, buf []byte) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func wait4(pid Pid_t, status *_C_int, options int, rusage *Rusage) (wpid Pid_t, err error) { r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_wait4)), 4, uintptr(pid), uintptr(unsafe.Pointer(status)), uintptr(options), uintptr(unsafe.Pointer(rusage)), 0, 0) wpid = Pid_t(r0) @@ -405,6 +429,8 @@ func wait4(pid Pid_t, status *_C_int, options int, rusage *Rusage) (wpid Pid_t, return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_bind)), 3, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0) if e1 != 0 { @@ -413,6 +439,8 @@ func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_connect)), 3, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0) if e1 != 0 { @@ -421,6 +449,8 @@ func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getkerninfo(op int32, where uintptr, size uintptr, arg int64) (i int32, err error) { r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Getkerninfo)), 4, uintptr(op), uintptr(where), uintptr(size), uintptr(arg), 0, 0) i = int32(r0) @@ -430,6 +460,8 @@ func Getkerninfo(op int32, where uintptr, size uintptr, arg int64) (i int32, err return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_getsockopt)), 5, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0) if e1 != 0 { @@ -438,6 +470,8 @@ func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Listen(s int, backlog int) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Listen)), 2, uintptr(s), uintptr(backlog), 0, 0, 0, 0) if e1 != 0 { @@ -446,6 +480,8 @@ func Listen(s int, backlog int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_setsockopt)), 5, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0) if e1 != 0 { @@ -454,6 +490,8 @@ func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func socket(domain int, typ int, proto int) (fd int, err error) { r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_socket)), 3, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0) fd = int(r0) @@ -463,6 +501,8 @@ func socket(domain int, typ int, proto int) (fd int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) { _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_socketpair)), 4, uintptr(domain), uintptr(typ), uintptr(proto), uintptr(unsafe.Pointer(fd)), 0, 0) if e1 != 0 { @@ -471,6 +511,8 @@ func socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_getpeername)), 3, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) if e1 != 0 { @@ -479,6 +521,8 @@ func getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_getsockname)), 3, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) if e1 != 0 { @@ -487,6 +531,8 @@ func getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) { var _p0 *byte if len(p) > 0 { @@ -500,6 +546,8 @@ func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Sockl return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) { var _p0 *byte if len(buf) > 0 { @@ -512,6 +560,8 @@ func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) ( return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Shutdown(s int, how int) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Shutdown)), 2, uintptr(s), uintptr(how), 0, 0, 0, 0) if e1 != 0 { @@ -520,6 +570,8 @@ func Shutdown(s int, how int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) { r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_recvmsg)), 3, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0) n = int(r0) @@ -529,6 +581,8 @@ func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) { r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_sendmsg)), 3, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0) n = int(r0) @@ -538,6 +592,8 @@ func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) { r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_accept)), 3, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) fd = int(r0) @@ -547,6 +603,8 @@ func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -561,6 +619,8 @@ func Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func ptrace64(request int, id int64, addr int64, data int, buff uintptr) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_ptrace64)), 5, uintptr(request), uintptr(id), uintptr(addr), uintptr(data), uintptr(buff), 0) if e1 != 0 { @@ -569,6 +629,8 @@ func ptrace64(request int, id int64, addr int64, data int, buff uintptr) (err er return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Acct(path string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -582,6 +644,8 @@ func Acct(path string) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Chdir(path string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -595,6 +659,8 @@ func Chdir(path string) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Chmod(path string, mode uint32) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -608,6 +674,8 @@ func Chmod(path string, mode uint32) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Chown(path string, uid int, gid int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -621,6 +689,8 @@ func Chown(path string, uid int, gid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Close(fd int) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Close)), 1, uintptr(fd), 0, 0, 0, 0, 0) if e1 != 0 { @@ -629,6 +699,8 @@ func Close(fd int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Dup(fd int) (nfd int, err error) { r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Dup)), 1, uintptr(fd), 0, 0, 0, 0, 0) nfd = int(r0) @@ -638,6 +710,8 @@ func Dup(fd int) (nfd int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -651,6 +725,8 @@ func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fchdir(fd int) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fchdir)), 1, uintptr(fd), 0, 0, 0, 0, 0) if e1 != 0 { @@ -659,6 +735,8 @@ func Fchdir(fd int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fchmod(fd int, mode uint32) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fchmod)), 2, uintptr(fd), uintptr(mode), 0, 0, 0, 0) if e1 != 0 { @@ -667,6 +745,8 @@ func Fchmod(fd int, mode uint32) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -680,6 +760,8 @@ func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fchown(fd int, uid int, gid int) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fchown)), 3, uintptr(fd), uintptr(uid), uintptr(gid), 0, 0, 0) if e1 != 0 { @@ -688,6 +770,8 @@ func Fchown(fd int, uid int, gid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -701,6 +785,8 @@ func Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fpathconf(fd int, name int) (val int, err error) { r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fpathconf)), 2, uintptr(fd), uintptr(name), 0, 0, 0, 0) val = int(r0) @@ -710,6 +796,8 @@ func Fpathconf(fd int, name int) (val int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fstat(fd int, stat *Stat_t) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fstat)), 2, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0, 0, 0, 0) if e1 != 0 { @@ -718,6 +806,8 @@ func Fstat(fd int, stat *Stat_t) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fstatfs(fd int, buf *Statfs_t) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fstatfs)), 2, uintptr(fd), uintptr(unsafe.Pointer(buf)), 0, 0, 0, 0) if e1 != 0 { @@ -726,6 +816,8 @@ func Fstatfs(fd int, buf *Statfs_t) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Ftruncate(fd int, length int64) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Ftruncate)), 2, uintptr(fd), uintptr(length), 0, 0, 0, 0) if e1 != 0 { @@ -734,6 +826,8 @@ func Ftruncate(fd int, length int64) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fsync(fd int) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Fsync)), 1, uintptr(fd), 0, 0, 0, 0, 0) if e1 != 0 { @@ -742,36 +836,48 @@ func Fsync(fd int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getgid() (gid int) { r0, _, _ := rawSyscall6(uintptr(unsafe.Pointer(&libc_Getgid)), 0, 0, 0, 0, 0, 0, 0) gid = int(r0) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getpid() (pid int) { r0, _, _ := rawSyscall6(uintptr(unsafe.Pointer(&libc_Getpid)), 0, 0, 0, 0, 0, 0, 0) pid = int(r0) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Geteuid() (euid int) { r0, _, _ := syscall6(uintptr(unsafe.Pointer(&libc_Geteuid)), 0, 0, 0, 0, 0, 0, 0) euid = int(r0) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getegid() (egid int) { r0, _, _ := syscall6(uintptr(unsafe.Pointer(&libc_Getegid)), 0, 0, 0, 0, 0, 0, 0) egid = int(r0) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getppid() (ppid int) { r0, _, _ := syscall6(uintptr(unsafe.Pointer(&libc_Getppid)), 0, 0, 0, 0, 0, 0, 0) ppid = int(r0) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getrlimit(which int, lim *Rlimit) (err error) { _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Getrlimit)), 2, uintptr(which), uintptr(unsafe.Pointer(lim)), 0, 0, 0, 0) if e1 != 0 { @@ -780,12 +886,16 @@ func Getrlimit(which int, lim *Rlimit) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getuid() (uid int) { r0, _, _ := rawSyscall6(uintptr(unsafe.Pointer(&libc_Getuid)), 0, 0, 0, 0, 0, 0, 0) uid = int(r0) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Kill(pid int, signum Signal) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Kill)), 2, uintptr(pid), uintptr(signum), 0, 0, 0, 0) if e1 != 0 { @@ -794,6 +904,8 @@ func Kill(pid int, signum Signal) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Lchown(path string, uid int, gid int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -807,6 +919,8 @@ func Lchown(path string, uid int, gid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Link(path string, link string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -825,6 +939,8 @@ func Link(path string, link string) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Lstat(path string, stat *Stat_t) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -838,6 +954,8 @@ func Lstat(path string, stat *Stat_t) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Mkdir(path string, mode uint32) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -851,6 +969,8 @@ func Mkdir(path string, mode uint32) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Mkdirat(dirfd int, path string, mode uint32) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -864,6 +984,8 @@ func Mkdirat(dirfd int, path string, mode uint32) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Mknodat(dirfd int, path string, mode uint32, dev int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -877,6 +999,8 @@ func Mknodat(dirfd int, path string, mode uint32, dev int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Open(path string, mode int, perm uint32) (fd int, err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -891,6 +1015,8 @@ func Open(path string, mode int, perm uint32) (fd int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Pread(fd int, p []byte, offset int64) (n int, err error) { var _p0 *byte if len(p) > 0 { @@ -904,6 +1030,8 @@ func Pread(fd int, p []byte, offset int64) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Pwrite(fd int, p []byte, offset int64) (n int, err error) { var _p0 *byte if len(p) > 0 { @@ -917,6 +1045,8 @@ func Pwrite(fd int, p []byte, offset int64) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func read(fd int, p []byte) (n int, err error) { var _p0 *byte if len(p) > 0 { @@ -930,6 +1060,8 @@ func read(fd int, p []byte) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Reboot(how int) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Reboot)), 1, uintptr(how), 0, 0, 0, 0, 0) if e1 != 0 { @@ -938,6 +1070,8 @@ func Reboot(how int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Rename(from string, to string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(from) @@ -956,6 +1090,8 @@ func Rename(from string, to string) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(oldpath) @@ -974,6 +1110,8 @@ func Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err e return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Rmdir(path string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -987,6 +1125,8 @@ func Rmdir(path string) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_lseek)), 3, uintptr(fd), uintptr(offset), uintptr(whence), 0, 0, 0) newoffset = int64(r0) @@ -996,6 +1136,8 @@ func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Setegid(egid int) (err error) { _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Setegid)), 1, uintptr(egid), 0, 0, 0, 0, 0) if e1 != 0 { @@ -1004,6 +1146,8 @@ func Setegid(egid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Seteuid(euid int) (err error) { _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Seteuid)), 1, uintptr(euid), 0, 0, 0, 0, 0) if e1 != 0 { @@ -1012,6 +1156,8 @@ func Seteuid(euid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Setgid(gid int) (err error) { _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Setgid)), 1, uintptr(gid), 0, 0, 0, 0, 0) if e1 != 0 { @@ -1020,6 +1166,8 @@ func Setgid(gid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Setpgid(pid int, pgid int) (err error) { _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Setpgid)), 2, uintptr(pid), uintptr(pgid), 0, 0, 0, 0) if e1 != 0 { @@ -1028,6 +1176,8 @@ func Setpgid(pid int, pgid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Setregid(rgid int, egid int) (err error) { _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Setregid)), 2, uintptr(rgid), uintptr(egid), 0, 0, 0, 0) if e1 != 0 { @@ -1036,6 +1186,8 @@ func Setregid(rgid int, egid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Setreuid(ruid int, euid int) (err error) { _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Setreuid)), 2, uintptr(ruid), uintptr(euid), 0, 0, 0, 0) if e1 != 0 { @@ -1044,6 +1196,8 @@ func Setreuid(ruid int, euid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Stat(path string, stat *Stat_t) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -1057,6 +1211,8 @@ func Stat(path string, stat *Stat_t) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Statfs(path string, buf *Statfs_t) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -1070,6 +1226,8 @@ func Statfs(path string, buf *Statfs_t) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Symlink(path string, link string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -1088,6 +1246,8 @@ func Symlink(path string, link string) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Truncate(path string, length int64) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -1101,12 +1261,16 @@ func Truncate(path string, length int64) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Umask(newmask int) (oldmask int) { r0, _, _ := syscall6(uintptr(unsafe.Pointer(&libc_Umask)), 1, uintptr(newmask), 0, 0, 0, 0, 0) oldmask = int(r0) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Unlink(path string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -1120,6 +1284,8 @@ func Unlink(path string) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Uname(buf *Utsname) (err error) { _, _, e1 := rawSyscall6(uintptr(unsafe.Pointer(&libc_Uname)), 1, uintptr(unsafe.Pointer(buf)), 0, 0, 0, 0, 0) if e1 != 0 { @@ -1128,6 +1294,8 @@ func Uname(buf *Utsname) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func write(fd int, p []byte) (n int, err error) { var _p0 *byte if len(p) > 0 { @@ -1141,6 +1309,8 @@ func write(fd int, p []byte) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func gettimeofday(tv *Timeval, tzp *Timezone) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_gettimeofday)), 2, uintptr(unsafe.Pointer(tv)), uintptr(unsafe.Pointer(tzp)), 0, 0, 0, 0) if e1 != 0 { @@ -1149,6 +1319,8 @@ func gettimeofday(tv *Timeval, tzp *Timezone) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) { r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_mmap)), 6, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flag), uintptr(fd), uintptr(pos)) ret = uintptr(r0) @@ -1158,6 +1330,8 @@ func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) ( return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func munmap(addr uintptr, length uintptr) (err error) { _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_munmap)), 2, uintptr(addr), uintptr(length), 0, 0, 0, 0) if e1 != 0 { diff --git a/src/syscall/zsyscall_solaris_amd64.go b/src/syscall/zsyscall_solaris_amd64.go index ecd37902e0..446ebfc503 100644 --- a/src/syscall/zsyscall_solaris_amd64.go +++ b/src/syscall/zsyscall_solaris_amd64.go @@ -1,4 +1,4 @@ -// mksyscall_solaris.pl -tags solaris,amd64 syscall_solaris.go syscall_solaris_amd64.go +// mksyscall_libc.pl -solaris -tags solaris,amd64 syscall_solaris.go syscall_solaris_amd64.go // Code generated by the command above; DO NOT EDIT. // +build solaris,amd64 @@ -263,6 +263,8 @@ var ( libc_utimensat libcFunc ) +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getcwd(buf []byte) (n int, err error) { var _p0 *byte if len(buf) > 0 { @@ -276,6 +278,8 @@ func Getcwd(buf []byte) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func getgroups(ngid int, gid *_Gid_t) (n int, err error) { r0, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc_getgroups)), 2, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0, 0, 0, 0) n = int(r0) @@ -285,6 +289,8 @@ func getgroups(ngid int, gid *_Gid_t) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func setgroups(ngid int, gid *_Gid_t) (err error) { _, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc_setgroups)), 2, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0, 0, 0, 0) if e1 != 0 { @@ -293,6 +299,8 @@ func setgroups(ngid int, gid *_Gid_t) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func fcntl(fd int, cmd int, arg int) (val int, err error) { r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_fcntl)), 3, uintptr(fd), uintptr(cmd), uintptr(arg), 0, 0, 0) val = int(r0) @@ -302,6 +310,8 @@ func fcntl(fd int, cmd int, arg int) (val int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) { r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_accept)), 3, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) fd = int(r0) @@ -311,6 +321,8 @@ func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) { r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc___xnet_sendmsg)), 3, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0) n = int(r0) @@ -320,6 +332,8 @@ func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Access(path string, mode uint32) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -333,6 +347,8 @@ func Access(path string, mode uint32) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Adjtime(delta *Timeval, olddelta *Timeval) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Adjtime)), 2, uintptr(unsafe.Pointer(delta)), uintptr(unsafe.Pointer(olddelta)), 0, 0, 0, 0) if e1 != 0 { @@ -341,6 +357,8 @@ func Adjtime(delta *Timeval, olddelta *Timeval) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Chdir(path string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -354,6 +372,8 @@ func Chdir(path string) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Chmod(path string, mode uint32) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -367,6 +387,8 @@ func Chmod(path string, mode uint32) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Chown(path string, uid int, gid int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -380,6 +402,8 @@ func Chown(path string, uid int, gid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Chroot(path string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -393,6 +417,8 @@ func Chroot(path string) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Close(fd int) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Close)), 1, uintptr(fd), 0, 0, 0, 0, 0) if e1 != 0 { @@ -401,6 +427,8 @@ func Close(fd int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Dup(fd int) (nfd int, err error) { r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Dup)), 1, uintptr(fd), 0, 0, 0, 0, 0) nfd = int(r0) @@ -410,6 +438,8 @@ func Dup(fd int) (nfd int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fchdir(fd int) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Fchdir)), 1, uintptr(fd), 0, 0, 0, 0, 0) if e1 != 0 { @@ -418,6 +448,8 @@ func Fchdir(fd int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fchmod(fd int, mode uint32) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Fchmod)), 2, uintptr(fd), uintptr(mode), 0, 0, 0, 0) if e1 != 0 { @@ -426,6 +458,8 @@ func Fchmod(fd int, mode uint32) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fchown(fd int, uid int, gid int) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Fchown)), 3, uintptr(fd), uintptr(uid), uintptr(gid), 0, 0, 0) if e1 != 0 { @@ -434,6 +468,8 @@ func Fchown(fd int, uid int, gid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fpathconf(fd int, name int) (val int, err error) { r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Fpathconf)), 2, uintptr(fd), uintptr(name), 0, 0, 0, 0) val = int(r0) @@ -443,6 +479,8 @@ func Fpathconf(fd int, name int) (val int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fstat(fd int, stat *Stat_t) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Fstat)), 2, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0, 0, 0, 0) if e1 != 0 { @@ -451,6 +489,8 @@ func Fstat(fd int, stat *Stat_t) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getdents(fd int, buf []byte, basep *uintptr) (n int, err error) { var _p0 *byte if len(buf) > 0 { @@ -464,36 +504,48 @@ func Getdents(fd int, buf []byte, basep *uintptr) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getgid() (gid int) { r0, _, _ := rawSysvicall6(uintptr(unsafe.Pointer(&libc_Getgid)), 0, 0, 0, 0, 0, 0, 0) gid = int(r0) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getpid() (pid int) { r0, _, _ := rawSysvicall6(uintptr(unsafe.Pointer(&libc_Getpid)), 0, 0, 0, 0, 0, 0, 0) pid = int(r0) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Geteuid() (euid int) { r0, _, _ := sysvicall6(uintptr(unsafe.Pointer(&libc_Geteuid)), 0, 0, 0, 0, 0, 0, 0) euid = int(r0) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getegid() (egid int) { r0, _, _ := sysvicall6(uintptr(unsafe.Pointer(&libc_Getegid)), 0, 0, 0, 0, 0, 0, 0) egid = int(r0) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getppid() (ppid int) { r0, _, _ := sysvicall6(uintptr(unsafe.Pointer(&libc_Getppid)), 0, 0, 0, 0, 0, 0, 0) ppid = int(r0) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getpriority(which int, who int) (n int, err error) { r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Getpriority)), 2, uintptr(which), uintptr(who), 0, 0, 0, 0) n = int(r0) @@ -503,6 +555,8 @@ func Getpriority(which int, who int) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getrlimit(which int, lim *Rlimit) (err error) { _, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc_Getrlimit)), 2, uintptr(which), uintptr(unsafe.Pointer(lim)), 0, 0, 0, 0) if e1 != 0 { @@ -511,6 +565,8 @@ func Getrlimit(which int, lim *Rlimit) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Gettimeofday(tv *Timeval) (err error) { _, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc_Gettimeofday)), 1, uintptr(unsafe.Pointer(tv)), 0, 0, 0, 0, 0) if e1 != 0 { @@ -519,12 +575,16 @@ func Gettimeofday(tv *Timeval) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Getuid() (uid int) { r0, _, _ := rawSysvicall6(uintptr(unsafe.Pointer(&libc_Getuid)), 0, 0, 0, 0, 0, 0, 0) uid = int(r0) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Kill(pid int, signum Signal) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Kill)), 2, uintptr(pid), uintptr(signum), 0, 0, 0, 0) if e1 != 0 { @@ -533,6 +593,8 @@ func Kill(pid int, signum Signal) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Lchown(path string, uid int, gid int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -546,6 +608,8 @@ func Lchown(path string, uid int, gid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Link(path string, link string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -564,6 +628,8 @@ func Link(path string, link string) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Listen(s int, backlog int) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc___xnet_listen)), 2, uintptr(s), uintptr(backlog), 0, 0, 0, 0) if e1 != 0 { @@ -572,6 +638,8 @@ func Listen(s int, backlog int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Lstat(path string, stat *Stat_t) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -585,6 +653,8 @@ func Lstat(path string, stat *Stat_t) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Mkdir(path string, mode uint32) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -598,6 +668,8 @@ func Mkdir(path string, mode uint32) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Mknod(path string, mode uint32, dev int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -611,6 +683,8 @@ func Mknod(path string, mode uint32, dev int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Nanosleep(time *Timespec, leftover *Timespec) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Nanosleep)), 2, uintptr(unsafe.Pointer(time)), uintptr(unsafe.Pointer(leftover)), 0, 0, 0, 0) if e1 != 0 { @@ -619,6 +693,8 @@ func Nanosleep(time *Timespec, leftover *Timespec) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Open(path string, mode int, perm uint32) (fd int, err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -633,6 +709,8 @@ func Open(path string, mode int, perm uint32) (fd int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Pathconf(path string, name int) (val int, err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -647,6 +725,8 @@ func Pathconf(path string, name int) (val int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Pread(fd int, p []byte, offset int64) (n int, err error) { var _p0 *byte if len(p) > 0 { @@ -660,6 +740,8 @@ func Pread(fd int, p []byte, offset int64) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Pwrite(fd int, p []byte, offset int64) (n int, err error) { var _p0 *byte if len(p) > 0 { @@ -673,6 +755,8 @@ func Pwrite(fd int, p []byte, offset int64) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func read(fd int, p []byte) (n int, err error) { var _p0 *byte if len(p) > 0 { @@ -686,6 +770,8 @@ func read(fd int, p []byte) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Readlink(path string, buf []byte) (n int, err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -704,6 +790,8 @@ func Readlink(path string, buf []byte) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Rename(from string, to string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(from) @@ -722,6 +810,8 @@ func Rename(from string, to string) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Rmdir(path string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -735,6 +825,8 @@ func Rmdir(path string) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_lseek)), 3, uintptr(fd), uintptr(offset), uintptr(whence), 0, 0, 0) newoffset = int64(r0) @@ -744,6 +836,8 @@ func Seek(fd int, offset int64, whence int) (newoffset int64, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_sendfile)), 4, uintptr(outfd), uintptr(infd), uintptr(unsafe.Pointer(offset)), uintptr(count), 0, 0) written = int(r0) @@ -753,6 +847,8 @@ func sendfile(outfd int, infd int, offset *int64, count int) (written int, err e return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Setegid(egid int) (err error) { _, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc_Setegid)), 1, uintptr(egid), 0, 0, 0, 0, 0) if e1 != 0 { @@ -761,6 +857,8 @@ func Setegid(egid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Seteuid(euid int) (err error) { _, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc_Seteuid)), 1, uintptr(euid), 0, 0, 0, 0, 0) if e1 != 0 { @@ -769,6 +867,8 @@ func Seteuid(euid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Setgid(gid int) (err error) { _, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc_Setgid)), 1, uintptr(gid), 0, 0, 0, 0, 0) if e1 != 0 { @@ -777,6 +877,8 @@ func Setgid(gid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Setpgid(pid int, pgid int) (err error) { _, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc_Setpgid)), 2, uintptr(pid), uintptr(pgid), 0, 0, 0, 0) if e1 != 0 { @@ -785,6 +887,8 @@ func Setpgid(pid int, pgid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Setpriority(which int, who int, prio int) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Setpriority)), 3, uintptr(which), uintptr(who), uintptr(prio), 0, 0, 0) if e1 != 0 { @@ -793,6 +897,8 @@ func Setpriority(which int, who int, prio int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Setregid(rgid int, egid int) (err error) { _, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc_Setregid)), 2, uintptr(rgid), uintptr(egid), 0, 0, 0, 0) if e1 != 0 { @@ -801,6 +907,8 @@ func Setregid(rgid int, egid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Setreuid(ruid int, euid int) (err error) { _, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc_Setreuid)), 2, uintptr(ruid), uintptr(euid), 0, 0, 0, 0) if e1 != 0 { @@ -809,6 +917,8 @@ func Setreuid(ruid int, euid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Setrlimit(which int, lim *Rlimit) (err error) { _, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc_Setrlimit)), 2, uintptr(which), uintptr(unsafe.Pointer(lim)), 0, 0, 0, 0) if e1 != 0 { @@ -817,6 +927,8 @@ func Setrlimit(which int, lim *Rlimit) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Setsid() (pid int, err error) { r0, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc_Setsid)), 0, 0, 0, 0, 0, 0, 0) pid = int(r0) @@ -826,6 +938,8 @@ func Setsid() (pid int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Setuid(uid int) (err error) { _, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc_Setuid)), 1, uintptr(uid), 0, 0, 0, 0, 0) if e1 != 0 { @@ -834,6 +948,8 @@ func Setuid(uid int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Shutdown(s int, how int) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_shutdown)), 2, uintptr(s), uintptr(how), 0, 0, 0, 0) if e1 != 0 { @@ -842,6 +958,8 @@ func Shutdown(s int, how int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Stat(path string, stat *Stat_t) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -855,6 +973,8 @@ func Stat(path string, stat *Stat_t) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Symlink(path string, link string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -873,6 +993,8 @@ func Symlink(path string, link string) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Sync() (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Sync)), 0, 0, 0, 0, 0, 0, 0) if e1 != 0 { @@ -881,6 +1003,8 @@ func Sync() (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Truncate(path string, length int64) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -894,6 +1018,8 @@ func Truncate(path string, length int64) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Fsync(fd int) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Fsync)), 1, uintptr(fd), 0, 0, 0, 0, 0) if e1 != 0 { @@ -902,6 +1028,8 @@ func Fsync(fd int) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Ftruncate(fd int, length int64) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Ftruncate)), 2, uintptr(fd), uintptr(length), 0, 0, 0, 0) if e1 != 0 { @@ -910,12 +1038,16 @@ func Ftruncate(fd int, length int64) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Umask(newmask int) (oldmask int) { r0, _, _ := sysvicall6(uintptr(unsafe.Pointer(&libc_Umask)), 1, uintptr(newmask), 0, 0, 0, 0, 0) oldmask = int(r0) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func Unlink(path string) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -929,6 +1061,8 @@ func Unlink(path string) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func utimes(path string, times *[2]Timeval) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) @@ -942,6 +1076,8 @@ func utimes(path string, times *[2]Timeval) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc___xnet_bind)), 3, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0) if e1 != 0 { @@ -950,6 +1086,8 @@ func bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc___xnet_connect)), 3, uintptr(s), uintptr(addr), uintptr(addrlen), 0, 0, 0) if e1 != 0 { @@ -958,6 +1096,8 @@ func connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) { r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_mmap)), 6, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flag), uintptr(fd), uintptr(pos)) ret = uintptr(r0) @@ -967,6 +1107,8 @@ func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) ( return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func munmap(addr uintptr, length uintptr) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_munmap)), 2, uintptr(addr), uintptr(length), 0, 0, 0, 0) if e1 != 0 { @@ -975,6 +1117,8 @@ func munmap(addr uintptr, length uintptr) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) { var _p0 *byte if len(buf) > 0 { @@ -987,6 +1131,8 @@ func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) ( return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func socket(domain int, typ int, proto int) (fd int, err error) { r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc___xnet_socket)), 3, uintptr(domain), uintptr(typ), uintptr(proto), 0, 0, 0) fd = int(r0) @@ -996,6 +1142,8 @@ func socket(domain int, typ int, proto int) (fd int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) { _, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc___xnet_socketpair)), 4, uintptr(domain), uintptr(typ), uintptr(proto), uintptr(unsafe.Pointer(fd)), 0, 0) if e1 != 0 { @@ -1004,6 +1152,8 @@ func socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func write(fd int, p []byte) (n int, err error) { var _p0 *byte if len(p) > 0 { @@ -1017,6 +1167,8 @@ func write(fd int, p []byte) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc___xnet_getsockopt)), 5, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0) if e1 != 0 { @@ -1025,6 +1177,8 @@ func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { _, _, e1 := rawSysvicall6(uintptr(unsafe.Pointer(&libc_getpeername)), 3, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) if e1 != 0 { @@ -1033,6 +1187,8 @@ func getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_getsockname)), 3, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0) if e1 != 0 { @@ -1041,6 +1197,8 @@ func getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) { _, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_setsockopt)), 5, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0) if e1 != 0 { @@ -1049,6 +1207,8 @@ func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) { var _p0 *byte if len(p) > 0 { @@ -1062,6 +1222,8 @@ func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Sockl return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) { r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc___xnet_recvmsg)), 3, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags), 0, 0, 0) n = int(r0) @@ -1071,6 +1233,8 @@ func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func getexecname() (path unsafe.Pointer, err error) { r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_getexecname)), 0, 0, 0, 0, 0, 0, 0) path = unsafe.Pointer(r0) @@ -1080,6 +1244,8 @@ func getexecname() (path unsafe.Pointer, err error) { return } +// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT + func utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error) { var _p0 *byte _p0, err = BytePtrFromString(path) From 555d8c455a420df4a2bd024a5cafdaa60ac3ae55 Mon Sep 17 00:00:00 2001 From: Josh Bleecher Snyder Date: Mon, 8 Oct 2018 17:43:26 -0700 Subject: [PATCH 080/240] cmd/compile: remove some inl budget hacks Prior to stack tracing, inlining could cause dead pointers to be kept alive in some loops. See #18336 and CL 31674. The adjustment removed by this change preserved the inlining status quo in the face of Node structure changes, to avoid creating new problems. Now that stack tracing provides precision, these hacks can be removed. Of course, our inlining code model is already hacky (#17566), but at least now there will be fewer epicyclical hacks. Newly inline-able functions in std cmd as a result of this change: hash/adler32/adler32.go:65:6: can inline (*digest).UnmarshalBinary hash/fnv/fnv.go:281:6: can inline (*sum32).UnmarshalBinary hash/fnv/fnv.go:292:6: can inline (*sum32a).UnmarshalBinary reflect/value.go:1298:6: can inline Value.OverflowComplex compress/bzip2/bit_reader.go:25:6: can inline newBitReader encoding/xml/xml.go:365:6: can inline (*Decoder).switchToReader vendor/golang_org/x/crypto/cryptobyte/builder.go:77:6: can inline (*Builder).AddUint16 crypto/x509/x509.go:1851:58: can inline buildExtensions.func2.1.1 crypto/x509/x509.go:1871:58: can inline buildExtensions.func2.3.1 crypto/x509/x509.go:1883:58: can inline buildExtensions.func2.4.1 cmd/vet/internal/cfg/builder.go:463:6: can inline (*builder).labeledBlock crypto/tls/handshake_messages.go:1450:6: can inline (*newSessionTicketMsg).marshal crypto/tls/handshake_server.go:769:6: can inline (*serverHandshakeState).clientHelloInfo crypto/tls/handshake_messages.go:1171:6: can inline (*nextProtoMsg).unmarshal cmd/link/internal/amd64/obj.go:40:6: can inline Init cmd/link/internal/ppc64/obj.go:40:6: can inline Init net/http/httputil/persist.go:54:6: can inline NewServerConn net/http/fcgi/child.go:83:6: can inline newResponse cmd/compile/internal/ssa/poset.go:245:6: can inline (*poset).newnode Change-Id: I19e8e383a6273849673d35189a9358870665f82f Reviewed-on: https://go-review.googlesource.com/c/141117 Run-TryBot: Josh Bleecher Snyder TryBot-Result: Gobot Gobot Reviewed-by: Ilya Tocar Reviewed-by: Matthew Dempsky --- src/cmd/compile/internal/gc/inl.go | 10 ---------- 1 file changed, 10 deletions(-) diff --git a/src/cmd/compile/internal/gc/inl.go b/src/cmd/compile/internal/gc/inl.go index f188c9a9cd..e364104a46 100644 --- a/src/cmd/compile/internal/gc/inl.go +++ b/src/cmd/compile/internal/gc/inl.go @@ -404,16 +404,6 @@ func (v *hairyVisitor) visit(n *Node) bool { } v.budget-- - // TODO(mdempsky/josharian): Hacks to appease toolstash; remove. - // See issue 17566 and CL 31674 for discussion. - switch n.Op { - case OSTRUCTKEY: - v.budget-- - case OSLICE, OSLICEARR, OSLICESTR: - v.budget-- - case OSLICE3, OSLICE3ARR: - v.budget -= 2 - } // When debugging, don't stop early, to get full cost of inlining this function if v.budget < 0 && Debug['m'] < 2 { From d5e722034ab19d47377507f3606c1a72f484d7eb Mon Sep 17 00:00:00 2001 From: Rob Pike Date: Wed, 10 Oct 2018 09:54:22 +1100 Subject: [PATCH 081/240] go/doc: add new mode bit PreserveAST to control clearing of data in AST To save memory in godoc, this package routinely clears fields of the AST to avoid keeping data that godoc no longer needs. For other programs, such as cmd/doc, this behavior is unfortunate. Also, one should be able to tell any package like this, "don't change my data". Add a Mode bit, defaulting to off to preserve existing behavior, that allows a client to specify that the AST is inviolate. This is necessary to address some of the outstanding issues in cmd/doc that require, for example, looking at function bodies. Fixes #26835 Change-Id: I01cc97c6addc5ab6abff885fff4bd53454a03bbc Reviewed-on: https://go-review.googlesource.com/c/140958 Reviewed-by: Robert Griesemer --- src/go/doc/doc.go | 13 +++++++++---- src/go/doc/reader.go | 40 ++++++++++++++++++++++++++-------------- 2 files changed, 35 insertions(+), 18 deletions(-) diff --git a/src/go/doc/doc.go b/src/go/doc/doc.go index 3c3e28d48f..d0d4d3265b 100644 --- a/src/go/doc/doc.go +++ b/src/go/doc/doc.go @@ -79,13 +79,18 @@ type Note struct { type Mode int const ( - // extract documentation for all package-level declarations, - // not just exported ones + // AllDecls says to extract documentation for all package-level + // declarations, not just exported ones. AllDecls Mode = 1 << iota - // show all embedded methods, not just the ones of - // invisible (unexported) anonymous fields + // AllMethods says to show all embedded methods, not just the ones of + // invisible (unexported) anonymous fields. AllMethods + + // PreserveAST says to leave the AST unmodified. Originally, pieces of + // the AST such as function bodies were nil-ed out to save memory in + // godoc, but not all programs want that behavior. + PreserveAST ) // New computes the package documentation for the given package AST. diff --git a/src/go/doc/reader.go b/src/go/doc/reader.go index 21d5907a03..26365e46b5 100644 --- a/src/go/doc/reader.go +++ b/src/go/doc/reader.go @@ -36,9 +36,10 @@ func recvString(recv ast.Expr) string { // set creates the corresponding Func for f and adds it to mset. // If there are multiple f's with the same name, set keeps the first -// one with documentation; conflicts are ignored. +// one with documentation; conflicts are ignored. The boolean +// specifies whether to leave the AST untouched. // -func (mset methodSet) set(f *ast.FuncDecl) { +func (mset methodSet) set(f *ast.FuncDecl, preserveAST bool) { name := f.Name.Name if g := mset[name]; g != nil && g.Doc != "" { // A function with the same name has already been registered; @@ -65,7 +66,9 @@ func (mset methodSet) set(f *ast.FuncDecl) { Recv: recv, Orig: recv, } - f.Doc = nil // doc consumed - remove from AST + if !preserveAST { + f.Doc = nil // doc consumed - remove from AST + } } // add adds method m to the method set; m is ignored if the method set @@ -299,8 +302,9 @@ func (r *reader) readValue(decl *ast.GenDecl) { Decl: decl, order: r.order, }) - decl.Doc = nil // doc consumed - remove from AST - + if r.mode&PreserveAST == 0 { + decl.Doc = nil // doc consumed - remove from AST + } // Note: It's important that the order used here is global because the cleanupTypes // methods may move values associated with types back into the global list. If the // order is list-specific, sorting is not deterministic because the same order value @@ -339,12 +343,14 @@ func (r *reader) readType(decl *ast.GenDecl, spec *ast.TypeSpec) { // compute documentation doc := spec.Doc - spec.Doc = nil // doc consumed - remove from AST if doc == nil { // no doc associated with the spec, use the declaration doc, if any doc = decl.Doc } - decl.Doc = nil // doc consumed - remove from AST + if r.mode&PreserveAST == 0 { + spec.Doc = nil // doc consumed - remove from AST + decl.Doc = nil // doc consumed - remove from AST + } typ.doc = doc.Text() // record anonymous fields (they may contribute methods) @@ -362,8 +368,10 @@ func (r *reader) readType(decl *ast.GenDecl, spec *ast.TypeSpec) { // readFunc processes a func or method declaration. // func (r *reader) readFunc(fun *ast.FuncDecl) { - // strip function body - fun.Body = nil + // strip function body if requested. + if r.mode&PreserveAST == 0 { + fun.Body = nil + } // associate methods with the receiver type, if any if fun.Recv != nil { @@ -380,7 +388,7 @@ func (r *reader) readFunc(fun *ast.FuncDecl) { return } if typ := r.lookupType(recvTypeName); typ != nil { - typ.methods.set(fun) + typ.methods.set(fun, r.mode&PreserveAST != 0) } // otherwise ignore the method // TODO(gri): There may be exported methods of non-exported types @@ -414,13 +422,13 @@ func (r *reader) readFunc(fun *ast.FuncDecl) { } // If there is exactly one result type, associate the function with that type. if numResultTypes == 1 { - typ.funcs.set(fun) + typ.funcs.set(fun, r.mode&PreserveAST != 0) return } } // just an ordinary function - r.funcs.set(fun) + r.funcs.set(fun, r.mode&PreserveAST != 0) } var ( @@ -481,7 +489,9 @@ func (r *reader) readFile(src *ast.File) { // add package documentation if src.Doc != nil { r.readDoc(src.Doc) - src.Doc = nil // doc consumed - remove from AST + if r.mode&PreserveAST == 0 { + src.Doc = nil // doc consumed - remove from AST + } } // add all declarations @@ -545,7 +555,9 @@ func (r *reader) readFile(src *ast.File) { // collect MARKER(...): annotations r.readNotes(src.Comments) - src.Comments = nil // consumed unassociated comments - remove from AST + if r.mode&PreserveAST == 0 { + src.Comments = nil // consumed unassociated comments - remove from AST + } } func (r *reader) readPackage(pkg *ast.Package, mode Mode) { From 294d16c9c58187492baf1fd8bac034b5fecbf0ba Mon Sep 17 00:00:00 2001 From: Rob Pike Date: Wed, 10 Oct 2018 11:50:49 +1100 Subject: [PATCH 082/240] cmd/doc: add a -src flag to show original source It's long-desired but was blocked by #26835. That is now fixed, so it's easy. When -src is off, we behave as before. But with -src set, initialize the go/doc package to preserve the original AST and things flow very easily. With -src, since you're seeing inside the package source anyway it shows unexported fields and constants: you see the original source. But you still need -u to ask about them. Fixes #18807 Change-Id: I473e90323b4eff0735360274dc0d2d9dba16ff8b Reviewed-on: https://go-review.googlesource.com/c/140959 Reviewed-by: Andrew Gerrand Run-TryBot: Andrew Gerrand TryBot-Result: Gobot Gobot --- src/cmd/doc/doc_test.go | 149 +++++++++++++++++++++++---------- src/cmd/doc/main.go | 5 ++ src/cmd/doc/pkg.go | 21 +++-- src/cmd/doc/testdata/pkg.go | 8 +- src/cmd/go/alldocs.go | 7 ++ src/cmd/go/internal/doc/doc.go | 7 ++ 6 files changed, 141 insertions(+), 56 deletions(-) diff --git a/src/cmd/doc/doc_test.go b/src/cmd/doc/doc_test.go index 6010f04b56..64b1fb596b 100644 --- a/src/cmd/doc/doc_test.go +++ b/src/cmd/doc/doc_test.go @@ -127,24 +127,24 @@ var tests = []test{ `type T1 = T2`, // Type alias }, []string{ - `const internalConstant = 2`, // No internal constants. - `var internalVariable = 2`, // No internal variables. - `func internalFunc(a int) bool`, // No internal functions. - `Comment about exported constant`, // No comment for single constant. - `Comment about exported variable`, // No comment for single variable. - `Comment about block of constants.`, // No comment for constant block. - `Comment about block of variables.`, // No comment for variable block. - `Comment before ConstOne`, // No comment for first entry in constant block. - `Comment before VarOne`, // No comment for first entry in variable block. - `ConstTwo = 2`, // No second entry in constant block. - `VarTwo = 2`, // No second entry in variable block. - `VarFive = 5`, // From block starting with unexported variable. - `type unexportedType`, // No unexported type. - `unexportedTypedConstant`, // No unexported typed constant. - `\bField`, // No fields. - `Method`, // No methods. - `someArgument[5-8]`, // No truncated arguments. - `type T1 T2`, // Type alias does not display as type declaration. + `const internalConstant = 2`, // No internal constants. + `var internalVariable = 2`, // No internal variables. + `func internalFunc(a int) bool`, // No internal functions. + `Comment about exported constant`, // No comment for single constant. + `Comment about exported variable`, // No comment for single variable. + `Comment about block of constants`, // No comment for constant block. + `Comment about block of variables`, // No comment for variable block. + `Comment before ConstOne`, // No comment for first entry in constant block. + `Comment before VarOne`, // No comment for first entry in variable block. + `ConstTwo = 2`, // No second entry in constant block. + `VarTwo = 2`, // No second entry in variable block. + `VarFive = 5`, // From block starting with unexported variable. + `type unexportedType`, // No unexported type. + `unexportedTypedConstant`, // No unexported typed constant. + `\bField`, // No fields. + `Method`, // No methods. + `someArgument[5-8]`, // No truncated arguments. + `type T1 T2`, // Type alias does not display as type declaration. }, }, // Package dump -u @@ -207,6 +207,18 @@ var tests = []test{ }, nil, }, + // Block of constants -src. + { + "block of constants with -src", + []string{"-src", p, `ConstTwo`}, + []string{ + `Comment about block of constants`, // Top comment. + `ConstOne.*=.*1`, // Each constant seen. + `ConstTwo.*=.*2.*Comment on line with ConstTwo`, + `constThree`, // Even unexported constants. + }, + nil, + }, // Block of constants with carryover type from unexported field. { "block of constants with carryover type", @@ -295,6 +307,17 @@ var tests = []test{ }, nil, }, + // Function with -src. + { + "function with -src", + []string{"-src", p, `ExportedFunc`}, + []string{ + `Comment about exported function`, // Include comment. + `func ExportedFunc\(a int\) bool`, + `return true != false`, // Include body. + }, + nil, + }, // Type. { @@ -304,21 +327,44 @@ var tests = []test{ `Comment about exported type`, // Include comment. `type ExportedType struct`, // Type definition. `Comment before exported field.*\n.*ExportedField +int` + - `.*Comment on line with exported field.`, - `ExportedEmbeddedType.*Comment on line with exported embedded field.`, + `.*Comment on line with exported field`, + `ExportedEmbeddedType.*Comment on line with exported embedded field`, `Has unexported fields`, `func \(ExportedType\) ExportedMethod\(a int\) bool`, `const ExportedTypedConstant ExportedType = iota`, // Must include associated constant. `func ExportedTypeConstructor\(\) \*ExportedType`, // Must include constructor. - `io.Reader.*Comment on line with embedded Reader.`, + `io.Reader.*Comment on line with embedded Reader`, }, []string{ - `unexportedField`, // No unexported field. - `int.*embedded`, // No unexported embedded field. - `Comment about exported method.`, // No comment about exported method. - `unexportedMethod`, // No unexported method. - `unexportedTypedConstant`, // No unexported constant. - `error`, // No embedded error. + `unexportedField`, // No unexported field. + `int.*embedded`, // No unexported embedded field. + `Comment about exported method`, // No comment about exported method. + `unexportedMethod`, // No unexported method. + `unexportedTypedConstant`, // No unexported constant. + `error`, // No embedded error. + }, + }, + // Type with -src. Will see unexported fields. + { + "type", + []string{"-src", p, `ExportedType`}, + []string{ + `Comment about exported type`, // Include comment. + `type ExportedType struct`, // Type definition. + `Comment before exported field.*\n.*ExportedField +int` + + `.*Comment on line with exported field`, + `ExportedEmbeddedType.*Comment on line with exported embedded field`, + `unexportedType.*Comment on line with unexported embedded field`, + `func \(ExportedType\) ExportedMethod\(a int\) bool`, + `const ExportedTypedConstant ExportedType = iota`, // Must include associated constant. + `func ExportedTypeConstructor\(\) \*ExportedType`, // Must include constructor. + `io.Reader.*Comment on line with embedded Reader`, + }, + []string{ + `int.*embedded`, // No unexported embedded field. + `Comment about exported method`, // No comment about exported method. + `unexportedMethod`, // No unexported method. + `unexportedTypedConstant`, // No unexported constant. }, }, // Type T1 dump (alias). @@ -341,14 +387,14 @@ var tests = []test{ `Comment about exported type`, // Include comment. `type ExportedType struct`, // Type definition. `Comment before exported field.*\n.*ExportedField +int`, - `unexportedField.*int.*Comment on line with unexported field.`, - `ExportedEmbeddedType.*Comment on line with exported embedded field.`, - `\*ExportedEmbeddedType.*Comment on line with exported embedded \*field.`, - `\*qualified.ExportedEmbeddedType.*Comment on line with exported embedded \*selector.field.`, - `unexportedType.*Comment on line with unexported embedded field.`, - `\*unexportedType.*Comment on line with unexported embedded \*field.`, - `io.Reader.*Comment on line with embedded Reader.`, - `error.*Comment on line with embedded error.`, + `unexportedField.*int.*Comment on line with unexported field`, + `ExportedEmbeddedType.*Comment on line with exported embedded field`, + `\*ExportedEmbeddedType.*Comment on line with exported embedded \*field`, + `\*qualified.ExportedEmbeddedType.*Comment on line with exported embedded \*selector.field`, + `unexportedType.*Comment on line with unexported embedded field`, + `\*unexportedType.*Comment on line with unexported embedded \*field`, + `io.Reader.*Comment on line with embedded Reader`, + `error.*Comment on line with embedded error`, `func \(ExportedType\) unexportedMethod\(a int\) bool`, `unexportedTypedConstant`, }, @@ -380,8 +426,8 @@ var tests = []test{ `type ExportedInterface interface`, // Interface definition. `Comment before exported method.*\n.*ExportedMethod\(\)` + `.*Comment on line with exported method`, - `io.Reader.*Comment on line with embedded Reader.`, - `error.*Comment on line with embedded error.`, + `io.Reader.*Comment on line with embedded Reader`, + `error.*Comment on line with embedded error`, `Has unexported methods`, }, []string{ @@ -400,9 +446,9 @@ var tests = []test{ `type ExportedInterface interface`, // Interface definition. `Comment before exported method.*\n.*ExportedMethod\(\)` + `.*Comment on line with exported method`, - `unexportedMethod\(\).*Comment on line with unexported method.`, - `io.Reader.*Comment on line with embedded Reader.`, - `error.*Comment on line with embedded error.`, + `unexportedMethod\(\).*Comment on line with unexported method`, + `io.Reader.*Comment on line with embedded Reader`, + `error.*Comment on line with embedded error`, }, []string{ `Has unexported methods`, @@ -418,7 +464,7 @@ var tests = []test{ `.*Comment on line with exported method`, }, []string{ - `Comment about exported interface.`, + `Comment about exported interface`, }, }, @@ -428,7 +474,7 @@ var tests = []test{ []string{p, `ExportedType.ExportedMethod`}, []string{ `func \(ExportedType\) ExportedMethod\(a int\) bool`, - `Comment about exported method.`, + `Comment about exported method`, }, nil, }, @@ -438,7 +484,18 @@ var tests = []test{ []string{"-u", p, `ExportedType.unexportedMethod`}, []string{ `func \(ExportedType\) unexportedMethod\(a int\) bool`, - `Comment about unexported method.`, + `Comment about unexported method`, + }, + nil, + }, + // Method with -src. + { + "method with -src", + []string{"-src", p, `ExportedType.ExportedMethod`}, + []string{ + `func \(ExportedType\) ExportedMethod\(a int\) bool`, + `Comment about exported method`, + `return true != true`, }, nil, }, @@ -450,8 +507,8 @@ var tests = []test{ []string{ `type ExportedType struct`, `ExportedField int`, - `Comment before exported field.`, - `Comment on line with exported field.`, + `Comment before exported field`, + `Comment on line with exported field`, `other fields elided`, }, nil, @@ -463,7 +520,7 @@ var tests = []test{ []string{"-u", p, `ExportedType.unexportedField`}, []string{ `unexportedField int`, - `Comment on line with unexported field.`, + `Comment on line with unexported field`, }, nil, }, diff --git a/src/cmd/doc/main.go b/src/cmd/doc/main.go index 982c8e054a..a3e09d3f87 100644 --- a/src/cmd/doc/main.go +++ b/src/cmd/doc/main.go @@ -28,6 +28,9 @@ // For commands, unless the -cmd flag is present "go doc command" // shows only the package-level docs for the package. // +// The -src flag causes doc to print the full source code for the symbol, such +// as the body of a struct, function or method. +// // For complete documentation, run "go help doc". package main @@ -50,6 +53,7 @@ var ( unexported bool // -u flag matchCase bool // -c flag showCmd bool // -cmd flag + showSrc bool // -src flag ) // usage is a replacement usage function for the flags package. @@ -85,6 +89,7 @@ func do(writer io.Writer, flagSet *flag.FlagSet, args []string) (err error) { flagSet.BoolVar(&unexported, "u", false, "show unexported symbols as well as exported") flagSet.BoolVar(&matchCase, "c", false, "symbol matching honors case (paths not affected)") flagSet.BoolVar(&showCmd, "cmd", false, "show symbols with package docs even if package is a command") + flagSet.BoolVar(&showSrc, "src", false, "show source code for symbol") flagSet.Parse(args) var paths []string var symbol, method string diff --git a/src/cmd/doc/pkg.go b/src/cmd/doc/pkg.go index 14e41b9106..154fb7b45f 100644 --- a/src/cmd/doc/pkg.go +++ b/src/cmd/doc/pkg.go @@ -137,7 +137,11 @@ func parsePackage(writer io.Writer, pkg *build.Package, userPath string) *Packag // from finding the symbol. Work around this for now, but we // should fix it in go/doc. // A similar story applies to factory functions. - docPkg := doc.New(astPkg, pkg.ImportPath, doc.AllDecls) + mode := doc.AllDecls + if showSrc { + mode |= doc.PreserveAST // See comment for Package.emit. + } + docPkg := doc.New(astPkg, pkg.ImportPath, mode) for _, typ := range docPkg.Types { docPkg.Consts = append(docPkg.Consts, typ.Consts...) docPkg.Vars = append(docPkg.Vars, typ.Vars...) @@ -177,14 +181,16 @@ func (pkg *Package) newlines(n int) { } } -// emit prints the node. +// emit prints the node. If showSrc is true, it ignores the provided comment, +// assuming the comment is in the node itself. Otherwise, the go/doc package +// clears the stuff we don't want to print anyway. It's a bit of a magic trick. func (pkg *Package) emit(comment string, node ast.Node) { if node != nil { err := format.Node(&pkg.buf, pkg.fs, node) if err != nil { log.Fatal(err) } - if comment != "" { + if comment != "" && !showSrc { pkg.newlines(1) doc.ToText(&pkg.buf, comment, " ", indent, indentedWidth) pkg.newlines(2) // Blank line after comment to separate from next item. @@ -611,7 +617,6 @@ func (pkg *Package) symbolDoc(symbol string) bool { } // Symbol is a function. decl := fun.Decl - decl.Body = nil pkg.emit(fun.Doc, decl) found = true } @@ -641,7 +646,7 @@ func (pkg *Package) symbolDoc(symbol string) bool { } for _, ident := range vspec.Names { - if isExported(ident.Name) { + if showSrc || isExported(ident.Name) { if vspec.Type == nil && vspec.Values == nil && typ != nil { // This a standalone identifier, as in the case of iota usage. // Thus, assume the type comes from the previous type. @@ -701,9 +706,10 @@ func (pkg *Package) symbolDoc(symbol string) bool { } // trimUnexportedElems modifies spec in place to elide unexported fields from -// structs and methods from interfaces (unless the unexported flag is set). +// structs and methods from interfaces (unless the unexported flag is set or we +// are asked to show the original source). func trimUnexportedElems(spec *ast.TypeSpec) { - if unexported { + if unexported || showSrc { return } switch typ := spec.Type.(type) { @@ -808,7 +814,6 @@ func (pkg *Package) printMethodDoc(symbol, method string) bool { for _, meth := range typ.Methods { if match(method, meth.Name) { decl := meth.Decl - decl.Body = nil pkg.emit(meth.Doc, decl) found = true } diff --git a/src/cmd/doc/testdata/pkg.go b/src/cmd/doc/testdata/pkg.go index bc069939f8..50105b5fcc 100644 --- a/src/cmd/doc/testdata/pkg.go +++ b/src/cmd/doc/testdata/pkg.go @@ -5,6 +5,8 @@ // Package comment. package pkg +import "io" + // Constants // Comment about exported constant. @@ -52,7 +54,9 @@ var ( ) // Comment about exported function. -func ExportedFunc(a int) bool +func ExportedFunc(a int) bool { + return true != false +} // Comment about internal function. func internalFunc(a int) bool @@ -73,7 +77,7 @@ type ExportedType struct { // Comment about exported method. func (ExportedType) ExportedMethod(a int) bool { - return true + return true != true } // Comment about unexported method. diff --git a/src/cmd/go/alldocs.go b/src/cmd/go/alldocs.go index 9528ca2984..f54f000b07 100644 --- a/src/cmd/go/alldocs.go +++ b/src/cmd/go/alldocs.go @@ -348,6 +348,13 @@ // Treat a command (package main) like a regular package. // Otherwise package main's exported symbols are hidden // when showing the package's top-level documentation. +// -src +// Show the full source code for the symbol. This will +// display the full Go source of its declaration and +// definition, such as a function definition (including +// the body), type declaration or enclosing const +// block. The output may therefore include unexported +// details. // -u // Show documentation for unexported as well as exported // symbols, methods, and fields. diff --git a/src/cmd/go/internal/doc/doc.go b/src/cmd/go/internal/doc/doc.go index 4e7dca082d..262bbb3ecb 100644 --- a/src/cmd/go/internal/doc/doc.go +++ b/src/cmd/go/internal/doc/doc.go @@ -112,6 +112,13 @@ Flags: Treat a command (package main) like a regular package. Otherwise package main's exported symbols are hidden when showing the package's top-level documentation. + -src + Show the full source code for the symbol. This will + display the full Go source of its declaration and + definition, such as a function definition (including + the body), type declaration or enclosing const + block. The output may therefore include unexported + details. -u Show documentation for unexported as well as exported symbols, methods, and fields. From 5b2030cbcacf0c1b5ea46230323595ab20fa8099 Mon Sep 17 00:00:00 2001 From: Matthew Dempsky Date: Wed, 10 Oct 2018 16:37:01 -0700 Subject: [PATCH 083/240] cmd/compile/internal/types: regen stringer file Forgot to do this for golang.org/cl/76312. Change-Id: Ic20fef3eeff14a805f608221aff1fa03934be3ca Reviewed-on: https://go-review.googlesource.com/c/141357 Run-TryBot: Matthew Dempsky Reviewed-by: Robert Griesemer TryBot-Result: Gobot Gobot --- src/cmd/compile/internal/types/etype_string.go | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/cmd/compile/internal/types/etype_string.go b/src/cmd/compile/internal/types/etype_string.go index 503a30d0b4..f234a31fd0 100644 --- a/src/cmd/compile/internal/types/etype_string.go +++ b/src/cmd/compile/internal/types/etype_string.go @@ -4,9 +4,9 @@ package types import "strconv" -const _EType_name = "xxxINT8UINT8INT16UINT16INT32UINT32INT64UINT64INTUINTUINTPTRCOMPLEX64COMPLEX128FLOAT32FLOAT64BOOLPTR32PTR64FUNCSLICEARRAYSTRUCTCHANMAPINTERFORWANYSTRINGUNSAFEPTRIDEALNILBLANKFUNCARGSCHANARGSDDDFIELDSSATUPLENTYPE" +const _EType_name = "xxxINT8UINT8INT16UINT16INT32UINT32INT64UINT64INTUINTUINTPTRCOMPLEX64COMPLEX128FLOAT32FLOAT64BOOLPTRFUNCSLICEARRAYSTRUCTCHANMAPINTERFORWANYSTRINGUNSAFEPTRIDEALNILBLANKFUNCARGSCHANARGSDDDFIELDSSATUPLENTYPE" -var _EType_index = [...]uint8{0, 3, 7, 12, 17, 23, 28, 34, 39, 45, 48, 52, 59, 68, 78, 85, 92, 96, 101, 106, 110, 115, 120, 126, 130, 133, 138, 142, 145, 151, 160, 165, 168, 173, 181, 189, 197, 200, 205, 210} +var _EType_index = [...]uint8{0, 3, 7, 12, 17, 23, 28, 34, 39, 45, 48, 52, 59, 68, 78, 85, 92, 96, 99, 103, 108, 113, 119, 123, 126, 131, 135, 138, 144, 153, 158, 161, 166, 174, 182, 190, 193, 198, 203} func (i EType) String() string { if i >= EType(len(_EType_index)-1) { From 27965c14364a9812794cd4933b539f04a9d7c6c9 Mon Sep 17 00:00:00 2001 From: Ben Shi Date: Tue, 9 Oct 2018 11:01:34 +0000 Subject: [PATCH 084/240] cmd/compile: optimize 386's ADDLconstmodifyidx4 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This CL optimize ADDLconstmodifyidx4 to INCL/DECL, when the constant is +1/-1. 1. The total size of pkg/linux_386/ decreases 28 bytes, excluding cmd/compile. 2. There is no regression in the go1 benchmark test, excluding noise. name old time/op new time/op delta BinaryTree17-4 3.25s ± 2% 3.23s ± 3% -0.70% (p=0.040 n=30+30) Fannkuch11-4 3.50s ± 1% 3.47s ± 1% -0.68% (p=0.000 n=30+30) FmtFprintfEmpty-4 44.6ns ± 3% 44.8ns ± 3% +0.46% (p=0.029 n=30+30) FmtFprintfString-4 79.0ns ± 3% 78.7ns ± 3% ~ (p=0.053 n=30+30) FmtFprintfInt-4 89.2ns ± 2% 89.4ns ± 3% ~ (p=0.665 n=30+29) FmtFprintfIntInt-4 142ns ± 3% 142ns ± 3% ~ (p=0.435 n=30+30) FmtFprintfPrefixedInt-4 182ns ± 2% 182ns ± 2% ~ (p=0.964 n=30+30) FmtFprintfFloat-4 407ns ± 3% 411ns ± 4% ~ (p=0.080 n=30+30) FmtManyArgs-4 597ns ± 3% 593ns ± 4% ~ (p=0.222 n=30+30) GobDecode-4 7.09ms ± 6% 7.07ms ± 7% ~ (p=0.633 n=30+30) GobEncode-4 6.81ms ± 9% 6.81ms ± 8% ~ (p=0.982 n=30+30) Gzip-4 398ms ± 4% 400ms ± 6% ~ (p=0.177 n=30+30) Gunzip-4 41.3ms ± 3% 40.6ms ± 4% -1.71% (p=0.005 n=30+30) HTTPClientServer-4 63.4µs ± 3% 63.4µs ± 4% ~ (p=0.646 n=30+28) JSONEncode-4 16.0ms ± 3% 16.1ms ± 3% ~ (p=0.057 n=30+30) JSONDecode-4 63.3ms ± 8% 63.1ms ± 7% ~ (p=0.786 n=30+30) Mandelbrot200-4 5.17ms ± 3% 5.15ms ± 8% ~ (p=0.654 n=30+30) GoParse-4 3.24ms ± 3% 3.23ms ± 2% ~ (p=0.091 n=30+30) RegexpMatchEasy0_32-4 103ns ± 4% 103ns ± 4% ~ (p=0.575 n=30+30) RegexpMatchEasy0_1K-4 823ns ± 2% 821ns ± 3% ~ (p=0.827 n=30+30) RegexpMatchEasy1_32-4 113ns ± 3% 112ns ± 3% ~ (p=0.076 n=30+30) RegexpMatchEasy1_1K-4 1.02µs ± 4% 1.01µs ± 5% ~ (p=0.087 n=30+30) RegexpMatchMedium_32-4 129ns ± 3% 127ns ± 4% -1.55% (p=0.009 n=30+30) RegexpMatchMedium_1K-4 39.3µs ± 4% 39.7µs ± 3% ~ (p=0.054 n=30+30) RegexpMatchHard_32-4 2.15µs ± 4% 2.15µs ± 4% ~ (p=0.712 n=30+30) RegexpMatchHard_1K-4 66.0µs ± 3% 65.1µs ± 3% -1.32% (p=0.002 n=30+30) Revcomp-4 1.85s ± 2% 1.85s ± 3% ~ (p=0.168 n=30+30) Template-4 69.5ms ± 7% 68.9ms ± 6% ~ (p=0.250 n=28+28) TimeParse-4 434ns ± 3% 432ns ± 4% ~ (p=0.629 n=30+30) TimeFormat-4 403ns ± 4% 408ns ± 3% +1.23% (p=0.019 n=30+29) [Geo mean] 65.5µs 65.3µs -0.20% name old speed new speed delta GobDecode-4 108MB/s ± 6% 109MB/s ± 6% ~ (p=0.636 n=30+30) GobEncode-4 113MB/s ±10% 113MB/s ± 9% ~ (p=0.982 n=30+30) Gzip-4 48.8MB/s ± 4% 48.6MB/s ± 5% ~ (p=0.178 n=30+30) Gunzip-4 470MB/s ± 3% 479MB/s ± 4% +1.72% (p=0.006 n=30+30) JSONEncode-4 121MB/s ± 3% 120MB/s ± 3% ~ (p=0.057 n=30+30) JSONDecode-4 30.7MB/s ± 8% 30.8MB/s ± 8% ~ (p=0.784 n=30+30) GoParse-4 17.9MB/s ± 3% 17.9MB/s ± 2% ~ (p=0.090 n=30+30) RegexpMatchEasy0_32-4 309MB/s ± 4% 309MB/s ± 3% ~ (p=0.530 n=30+30) RegexpMatchEasy0_1K-4 1.24GB/s ± 2% 1.25GB/s ± 3% ~ (p=0.976 n=30+30) RegexpMatchEasy1_32-4 282MB/s ± 3% 284MB/s ± 3% +0.81% (p=0.041 n=30+30) RegexpMatchEasy1_1K-4 1.00GB/s ± 3% 1.01GB/s ± 4% ~ (p=0.091 n=30+30) RegexpMatchMedium_32-4 7.71MB/s ± 3% 7.84MB/s ± 4% +1.71% (p=0.000 n=30+30) RegexpMatchMedium_1K-4 26.1MB/s ± 4% 25.8MB/s ± 3% ~ (p=0.051 n=30+30) RegexpMatchHard_32-4 14.9MB/s ± 4% 14.9MB/s ± 4% ~ (p=0.712 n=30+30) RegexpMatchHard_1K-4 15.5MB/s ± 3% 15.7MB/s ± 3% +1.34% (p=0.003 n=30+30) Revcomp-4 138MB/s ± 2% 137MB/s ± 3% ~ (p=0.174 n=30+30) Template-4 28.0MB/s ± 6% 28.2MB/s ± 6% ~ (p=0.251 n=28+28) [Geo mean] 82.3MB/s 82.6MB/s +0.36% Change-Id: I389829699ffe9500a013fcf31be58a97e98043e1 Reviewed-on: https://go-review.googlesource.com/c/140701 Run-TryBot: Ben Shi TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/cmd/compile/internal/x86/ssa.go | 21 ++++++++++++++++++++- test/codegen/arithmetic.go | 2 ++ 2 files changed, 22 insertions(+), 1 deletion(-) diff --git a/src/cmd/compile/internal/x86/ssa.go b/src/cmd/compile/internal/x86/ssa.go index 4ed46b9c8c..e0aebb449c 100644 --- a/src/cmd/compile/internal/x86/ssa.go +++ b/src/cmd/compile/internal/x86/ssa.go @@ -603,8 +603,27 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { p.To.Type = obj.TYPE_MEM p.To.Reg = v.Args[0].Reg() gc.AddAux2(&p.To, v, sc.Off()) + case ssa.Op386ADDLconstmodifyidx4: + sc := v.AuxValAndOff() + val := sc.Val() + if val == 1 || val == -1 { + var p *obj.Prog + if val == 1 { + p = s.Prog(x86.AINCL) + } else { + p = s.Prog(x86.ADECL) + } + off := sc.Off() + p.To.Type = obj.TYPE_MEM + p.To.Reg = v.Args[0].Reg() + p.To.Scale = 4 + p.To.Index = v.Args[1].Reg() + gc.AddAux2(&p.To, v, off) + break + } + fallthrough case ssa.Op386MOVLstoreconstidx1, ssa.Op386MOVLstoreconstidx4, ssa.Op386MOVWstoreconstidx1, ssa.Op386MOVWstoreconstidx2, ssa.Op386MOVBstoreconstidx1, - ssa.Op386ADDLconstmodifyidx4, ssa.Op386ANDLconstmodifyidx4, ssa.Op386ORLconstmodifyidx4, ssa.Op386XORLconstmodifyidx4: + ssa.Op386ANDLconstmodifyidx4, ssa.Op386ORLconstmodifyidx4, ssa.Op386XORLconstmodifyidx4: p := s.Prog(v.Op.Asm()) p.From.Type = obj.TYPE_CONST sc := v.AuxValAndOff() diff --git a/test/codegen/arithmetic.go b/test/codegen/arithmetic.go index 0b209f5130..879aaf285c 100644 --- a/test/codegen/arithmetic.go +++ b/test/codegen/arithmetic.go @@ -32,6 +32,8 @@ func SubMem(arr []int, b, c, d int) int { arr[c] -= b // 386:`ADDL\s[$]-15,\s\([A-Z]+\)\([A-Z]+\*4\)` arr[d] -= 15 + // 386:`DECL\s\([A-Z]+\)\([A-Z]+\*4\)` + arr[b]-- // 386:"SUBL\t4" // amd64:"SUBQ\t8" return arr[0] - arr[1] From daf6f254336844ad8cf538640d81f0193988b62a Mon Sep 17 00:00:00 2001 From: Rob Pike Date: Thu, 11 Oct 2018 13:13:03 +1100 Subject: [PATCH 085/240] unsafe: document that Alignof, Offsetof, and Sizeof return a constant Nothing is changing but the documentation, which did not mention this property of these functions. Fixes #27587. Change-Id: I75bcee4a1dd9ec8cd82826c9a6e02ba7d599f719 Reviewed-on: https://go-review.googlesource.com/c/141377 Reviewed-by: Brad Fitzpatrick --- src/unsafe/unsafe.go | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/unsafe/unsafe.go b/src/unsafe/unsafe.go index 00961cffa3..e16c4aeacb 100644 --- a/src/unsafe/unsafe.go +++ b/src/unsafe/unsafe.go @@ -178,11 +178,13 @@ type Pointer *ArbitraryType // The size does not include any memory possibly referenced by x. // For instance, if x is a slice, Sizeof returns the size of the slice // descriptor, not the size of the memory referenced by the slice. +// The return value of Sizeof is a Go constant. func Sizeof(x ArbitraryType) uintptr // Offsetof returns the offset within the struct of the field represented by x, // which must be of the form structValue.field. In other words, it returns the // number of bytes between the start of the struct and the start of the field. +// The return value of Offsetof is a Go constant. func Offsetof(x ArbitraryType) uintptr // Alignof takes an expression x of any type and returns the required alignment @@ -193,4 +195,5 @@ func Offsetof(x ArbitraryType) uintptr // within that struct, then Alignof(s.f) will return the required alignment // of a field of that type within a struct. This case is the same as the // value returned by reflect.TypeOf(s.f).FieldAlign(). +// The return value of Alignof is a Go constant. func Alignof(x ArbitraryType) uintptr From 9a9dc36f97bf57e186ab8183a27927abb9aecd61 Mon Sep 17 00:00:00 2001 From: Rob Pike Date: Thu, 11 Oct 2018 13:21:54 +1100 Subject: [PATCH 086/240] text/template: explain that integer constants can overflow This behavior is the same as in Go: constants can be coerced to int and whether overflow occurs depends on how big an int is, but this surprises people sometimes, so document it again here. Fixes #25833. Change-Id: I557995f1a1e8e871b21004953923d16f36cb9037 Reviewed-on: https://go-review.googlesource.com/c/141378 Reviewed-by: Brad Fitzpatrick --- src/text/template/doc.go | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/text/template/doc.go b/src/text/template/doc.go index 4b243067b0..0179dec5c3 100644 --- a/src/text/template/doc.go +++ b/src/text/template/doc.go @@ -142,7 +142,9 @@ An argument is a simple value, denoted by one of the following. - A boolean, string, character, integer, floating-point, imaginary or complex constant in Go syntax. These behave like Go's untyped - constants. + constants. Note that, as in Go, whether a large integer constant + overflows when assigned or passed to a function can depend on whether + the host machine's ints are 32 or 64 bits. - The keyword nil, representing an untyped Go nil. - The character '.' (period): . From c96c2a39bb09da48b3af63de58f65fdc82865746 Mon Sep 17 00:00:00 2001 From: LotusFenn Date: Sat, 7 Jul 2018 09:21:04 +0800 Subject: [PATCH 087/240] bytes: vary the input alignment to Compare argument in compare_test.go Currently there are no tests that vary the alignment of Compare arguments. Since Compare is written in assembly on most platforms (in internal/bytealg) we should be testing different input alignments. This change modifies TestCompare to vary the alignment of the second argument of Compare. Updates #26129 Change-Id: I4c30a5adf96a41225df748675f4e9beea413b35c Reviewed-on: https://go-review.googlesource.com/c/122536 Reviewed-by: Lotus Fenn Reviewed-by: Ian Lance Taylor Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot --- src/bytes/compare_test.go | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/src/bytes/compare_test.go b/src/bytes/compare_test.go index 3e33c27c9c..a321f2e086 100644 --- a/src/bytes/compare_test.go +++ b/src/bytes/compare_test.go @@ -41,9 +41,16 @@ var compareTests = []struct { func TestCompare(t *testing.T) { for _, tt := range compareTests { - cmp := Compare(tt.a, tt.b) - if cmp != tt.i { - t.Errorf(`Compare(%q, %q) = %v`, tt.a, tt.b, cmp) + numShifts := 16 + buffer := make([]byte, len(tt.b)+numShifts) + // vary the input alignment of tt.b + for offset := 0; offset <= numShifts; offset++ { + shiftedB := buffer[offset : len(tt.b)+offset] + copy(shiftedB, tt.b) + cmp := Compare(tt.a, shiftedB) + if cmp != tt.i { + t.Errorf(`Compare(%q, %q), offset %d = %v; want %v`, tt.a, tt.b, offset, cmp, tt.i) + } } } } From 23578f9d00bb0d6e92f18d7d6ea961d7c6c52260 Mon Sep 17 00:00:00 2001 From: Carlos Eduardo Seo Date: Mon, 1 Oct 2018 23:37:00 -0300 Subject: [PATCH 088/240] cmd/compile: intrinsify TrailingZeros16, OnesCount{8,16} for ppc64x This change implements TrailingZeros16, OnesCount8 and OnesCount16 as intrinsics for ppc64x. benchmark old ns/op new ns/op delta BenchmarkTrailingZeros16-40 2.16 1.61 -25.46% benchmark old ns/op new ns/op delta BenchmarkOnesCount-40 0.71 0.71 +0.00% BenchmarkOnesCount8-40 0.93 0.69 -25.81% BenchmarkOnesCount16-40 1.54 0.75 -51.30% BenchmarkOnesCount32-40 0.75 0.74 -1.33% BenchmarkOnesCount64-40 0.71 0.71 +0.00% Change-Id: I010fa9c0ef596a09362870d81193c633e70da637 Reviewed-on: https://go-review.googlesource.com/c/139137 Run-TryBot: Lynn Boger TryBot-Result: Gobot Gobot Reviewed-by: Lynn Boger --- src/cmd/compile/internal/gc/ssa.go | 6 +-- src/cmd/compile/internal/ssa/gen/PPC64.rules | 4 +- src/cmd/compile/internal/ssa/rewritePPC64.go | 54 +++++++++++++++++++- 3 files changed, 58 insertions(+), 6 deletions(-) diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go index 469fbb8c96..5b11e15655 100644 --- a/src/cmd/compile/internal/gc/ssa.go +++ b/src/cmd/compile/internal/gc/ssa.go @@ -3236,7 +3236,7 @@ func init() { y := s.newValue2(ssa.OpOr64, types.Types[TUINT64], x, c) return s.newValue1(ssa.OpCtz64, types.Types[TINT], y) }, - sys.ARM64, sys.S390X) + sys.ARM64, sys.S390X, sys.PPC64) addF("math/bits", "TrailingZeros8", func(s *state, n *Node, args []*ssa.Value) *ssa.Value { x := s.newValue1(ssa.OpZeroExt8to32, types.Types[TUINT32], args[0]) @@ -3427,12 +3427,12 @@ func init() { func(s *state, n *Node, args []*ssa.Value) *ssa.Value { return s.newValue1(ssa.OpPopCount16, types.Types[TINT], args[0]) }, - sys.ARM64, sys.S390X) + sys.ARM64, sys.S390X, sys.PPC64) addF("math/bits", "OnesCount8", func(s *state, n *Node, args []*ssa.Value) *ssa.Value { return s.newValue1(ssa.OpPopCount8, types.Types[TINT], args[0]) }, - sys.S390X) + sys.S390X, sys.PPC64) addF("math/bits", "OnesCount", makeOnesCountAMD64(ssa.OpPopCount64, ssa.OpPopCount32), sys.AMD64) diff --git a/src/cmd/compile/internal/ssa/gen/PPC64.rules b/src/cmd/compile/internal/ssa/gen/PPC64.rules index 21c12591c5..be1bd6de0b 100644 --- a/src/cmd/compile/internal/ssa/gen/PPC64.rules +++ b/src/cmd/compile/internal/ssa/gen/PPC64.rules @@ -297,6 +297,8 @@ (Ctz64 x) -> (POPCNTD (ANDN (ADDconst [-1] x) x)) (Ctz32 x) -> (POPCNTW (MOVWZreg (ANDN (ADDconst [-1] x) x))) +(Ctz16 x) -> (POPCNTW (MOVHZreg (ANDN (ADDconst [-1] x) x))) +(Ctz8 x) -> (POPCNTB (MOVBZreg (ANDN (ADDconst [-1] x) x))) (BitLen64 x) -> (SUB (MOVDconst [64]) (CNTLZD x)) (BitLen32 x) -> (SUB (MOVDconst [32]) (CNTLZW x)) @@ -304,7 +306,7 @@ (PopCount64 x) -> (POPCNTD x) (PopCount32 x) -> (POPCNTW (MOVWZreg x)) (PopCount16 x) -> (POPCNTW (MOVHZreg x)) -(PopCount8 x) -> (POPCNTB (MOVBreg x)) +(PopCount8 x) -> (POPCNTB (MOVBZreg x)) (And(64|32|16|8) x y) -> (AND x y) (Or(64|32|16|8) x y) -> (OR x y) diff --git a/src/cmd/compile/internal/ssa/rewritePPC64.go b/src/cmd/compile/internal/ssa/rewritePPC64.go index 9aff3106db..8f100c1a38 100644 --- a/src/cmd/compile/internal/ssa/rewritePPC64.go +++ b/src/cmd/compile/internal/ssa/rewritePPC64.go @@ -105,6 +105,8 @@ func rewriteValuePPC64(v *Value) bool { return rewriteValuePPC64_OpConstNil_0(v) case OpCopysign: return rewriteValuePPC64_OpCopysign_0(v) + case OpCtz16: + return rewriteValuePPC64_OpCtz16_0(v) case OpCtz32: return rewriteValuePPC64_OpCtz32_0(v) case OpCtz32NonZero: @@ -113,6 +115,8 @@ func rewriteValuePPC64(v *Value) bool { return rewriteValuePPC64_OpCtz64_0(v) case OpCtz64NonZero: return rewriteValuePPC64_OpCtz64NonZero_0(v) + case OpCtz8: + return rewriteValuePPC64_OpCtz8_0(v) case OpCvt32Fto32: return rewriteValuePPC64_OpCvt32Fto32_0(v) case OpCvt32Fto64: @@ -1323,6 +1327,29 @@ func rewriteValuePPC64_OpCopysign_0(v *Value) bool { return true } } +func rewriteValuePPC64_OpCtz16_0(v *Value) bool { + b := v.Block + _ = b + typ := &b.Func.Config.Types + _ = typ + // match: (Ctz16 x) + // cond: + // result: (POPCNTW (MOVHZreg (ANDN (ADDconst [-1] x) x))) + for { + x := v.Args[0] + v.reset(OpPPC64POPCNTW) + v0 := b.NewValue0(v.Pos, OpPPC64MOVHZreg, typ.Int64) + v1 := b.NewValue0(v.Pos, OpPPC64ANDN, typ.Int16) + v2 := b.NewValue0(v.Pos, OpPPC64ADDconst, typ.Int16) + v2.AuxInt = -1 + v2.AddArg(x) + v1.AddArg(v2) + v1.AddArg(x) + v0.AddArg(v1) + v.AddArg(v0) + return true + } +} func rewriteValuePPC64_OpCtz32_0(v *Value) bool { b := v.Block _ = b @@ -1389,6 +1416,29 @@ func rewriteValuePPC64_OpCtz64NonZero_0(v *Value) bool { return true } } +func rewriteValuePPC64_OpCtz8_0(v *Value) bool { + b := v.Block + _ = b + typ := &b.Func.Config.Types + _ = typ + // match: (Ctz8 x) + // cond: + // result: (POPCNTB (MOVBZreg (ANDN (ADDconst [-1] x) x))) + for { + x := v.Args[0] + v.reset(OpPPC64POPCNTB) + v0 := b.NewValue0(v.Pos, OpPPC64MOVBZreg, typ.Int64) + v1 := b.NewValue0(v.Pos, OpPPC64ANDN, typ.UInt8) + v2 := b.NewValue0(v.Pos, OpPPC64ADDconst, typ.UInt8) + v2.AuxInt = -1 + v2.AddArg(x) + v1.AddArg(v2) + v1.AddArg(x) + v0.AddArg(v1) + v.AddArg(v0) + return true + } +} func rewriteValuePPC64_OpCvt32Fto32_0(v *Value) bool { b := v.Block _ = b @@ -26653,11 +26703,11 @@ func rewriteValuePPC64_OpPopCount8_0(v *Value) bool { _ = typ // match: (PopCount8 x) // cond: - // result: (POPCNTB (MOVBreg x)) + // result: (POPCNTB (MOVBZreg x)) for { x := v.Args[0] v.reset(OpPPC64POPCNTB) - v0 := b.NewValue0(v.Pos, OpPPC64MOVBreg, typ.Int64) + v0 := b.NewValue0(v.Pos, OpPPC64MOVBZreg, typ.Int64) v0.AddArg(x) v.AddArg(v0) return true From 1d0e94b1e13d5e8a323a63cd1cc1ef95290c9c36 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= Date: Fri, 28 Sep 2018 15:58:19 +0200 Subject: [PATCH 089/240] path/filepath: add AIX operating system This commit adds AIX operating system to path/filepath package for ppc64 architecture. Updates: #25893 Change-Id: Iea551236d334705a58a446c8992b20adcfe4159b Reviewed-on: https://go-review.googlesource.com/c/138726 Reviewed-by: Brad Fitzpatrick --- src/path/filepath/path_unix.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/path/filepath/path_unix.go b/src/path/filepath/path_unix.go index 349dea7b53..c10b3288a1 100644 --- a/src/path/filepath/path_unix.go +++ b/src/path/filepath/path_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris package filepath From bac6a2925c50964e9387da5d37f2f23d4e5e7ac4 Mon Sep 17 00:00:00 2001 From: Ben Shi Date: Tue, 9 Oct 2018 06:56:49 +0000 Subject: [PATCH 090/240] test/codegen: add more arm64 test cases This CL adds 3 combined load test cases for arm64. Change-Id: I2c67308c40fd8a18f9f2d16c6d12911dcdc583e2 Reviewed-on: https://go-review.googlesource.com/c/140700 Run-TryBot: Ben Shi TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- test/codegen/memcombine.go | 40 +++++++++++++++++--------------------- 1 file changed, 18 insertions(+), 22 deletions(-) diff --git a/test/codegen/memcombine.go b/test/codegen/memcombine.go index 9c4b36818e..230aadfb74 100644 --- a/test/codegen/memcombine.go +++ b/test/codegen/memcombine.go @@ -468,6 +468,24 @@ func store_be_byte_2_idx2(b []byte, idx int, val uint16) { b[(idx<<1)+0], b[(idx<<1)+1] = byte(val>>8), byte(val) } +func store_le_byte_2_idx2(b []byte, idx int, val uint16) { + _, _ = b[(idx<<1)+0], b[(idx<<1)+1] + // arm64:`MOVH\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+<<1\)`,-`MOVB` + b[(idx<<1)+1], b[(idx<<1)+0] = byte(val>>8), byte(val) +} + +func store_be_byte_4_idx4(b []byte, idx int, val uint32) { + _, _, _, _ = b[(idx<<2)+0], b[(idx<<2)+1], b[(idx<<2)+2], b[(idx<<2)+3] + // arm64:`REVW`,`MOVW\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+<<2\)`,-`MOVB`,-`MOVH`,-`REV16W` + b[(idx<<2)+0], b[(idx<<2)+1], b[(idx<<2)+2], b[(idx<<2)+3] = byte(val>>24), byte(val>>16), byte(val>>8), byte(val) +} + +func store_le_byte_4_idx4_inv(b []byte, idx int, val uint32) { + _, _, _, _ = b[(idx<<2)+0], b[(idx<<2)+1], b[(idx<<2)+2], b[(idx<<2)+3] + // arm64:`MOVW\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+<<2\)`,-`MOVB`,-`MOVH` + b[(idx<<2)+3], b[(idx<<2)+2], b[(idx<<2)+1], b[(idx<<2)+0] = byte(val>>24), byte(val>>16), byte(val>>8), byte(val) +} + // ------------- // // Zeroing // // ------------- // @@ -501,28 +519,6 @@ func zero_byte_16(b []byte) { b[12], b[13], b[14], b[15] = 0, 0, 0, 0 // arm64:"STP",-"MOVB",-"MOVH",-"MOVW" } -/* TODO: enable them when corresponding optimization are implemented -func zero_byte_4_idx(b []byte, idx int) { - // arm64(DISABLED): `MOVW\sZR,\s\(R[0-9]+\)\(R[0-9]+<<2\)`,-`MOV[BH]` - b[(idx<<2)+0] = 0 - b[(idx<<2)+1] = 0 - b[(idx<<2)+2] = 0 - b[(idx<<2)+3] = 0 -} - -func zero_byte_8_idx(b []byte, idx int) { - // arm64(DISABLED): `MOVD\sZR,\s\(R[0-9]+\)\(R[0-9]+<<3\)`,-`MOV[BHW]` - b[(idx<<3)+0] = 0 - b[(idx<<3)+1] = 0 - b[(idx<<3)+2] = 0 - b[(idx<<3)+3] = 0 - b[(idx<<3)+4] = 0 - b[(idx<<3)+5] = 0 - b[(idx<<3)+6] = 0 - b[(idx<<3)+7] = 0 -} -*/ - func zero_byte_30(a *[30]byte) { *a = [30]byte{} // arm64:"STP",-"MOVB",-"MOVH",-"MOVW" } From 69c5830c2b74b9bf0701352f2e5773227cb6f304 Mon Sep 17 00:00:00 2001 From: David Chase Date: Wed, 10 Oct 2018 16:08:24 -0400 Subject: [PATCH 091/240] cmd/compile: repair display of values & blocks in prog column This restores the printing of vXX and bYY in the left-hand edge of the last column of ssa.html, where the generated progs appear. Change-Id: I81ab9b2fa5ae28e6e5de1b77665cfbed8d14e000 Reviewed-on: https://go-review.googlesource.com/c/141277 Run-TryBot: David Chase TryBot-Result: Gobot Gobot Reviewed-by: Yury Smolsky --- src/cmd/compile/internal/gc/ssa.go | 13 ++++++------- src/cmd/compile/internal/ssa/debug.go | 6 +++++- src/cmd/compile/internal/ssa/func.go | 7 ++++--- 3 files changed, 15 insertions(+), 11 deletions(-) diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go index 5b11e15655..4a4461948c 100644 --- a/src/cmd/compile/internal/gc/ssa.go +++ b/src/cmd/compile/internal/gc/ssa.go @@ -147,6 +147,7 @@ func buildssa(fn *Node, worker int) *ssa.Func { s.f.Cache.Reset() s.f.DebugTest = s.f.DebugHashMatch("GOSSAHASH", name) s.f.Name = name + s.f.PrintOrHtmlSSA = printssa if fn.Func.Pragma&Nosplit != 0 { s.f.NoSplit = true } @@ -5000,9 +5001,7 @@ func genssa(f *ssa.Func, pp *Progs) { var progToValue map[*obj.Prog]*ssa.Value var progToBlock map[*obj.Prog]*ssa.Block var valueToProgAfter []*obj.Prog // The first Prog following computation of a value v; v is visible at this point. - var logProgs = e.log - if f.HTMLWriter != nil { - // logProgs can be false, meaning that we do not dump to the Stdout. + if f.PrintOrHtmlSSA { progToValue = make(map[*obj.Prog]*ssa.Value, f.NumValues()) progToBlock = make(map[*obj.Prog]*ssa.Block, f.NumBlocks()) f.Logf("genssa %s\n", f.Name) @@ -5085,7 +5084,7 @@ func genssa(f *ssa.Func, pp *Progs) { valueToProgAfter[v.ID] = s.pp.next } - if logProgs { + if f.PrintOrHtmlSSA { for ; x != s.pp.next; x = x.Link { progToValue[x] = v } @@ -5103,7 +5102,7 @@ func genssa(f *ssa.Func, pp *Progs) { x := s.pp.next s.SetPos(b.Pos) thearch.SSAGenBlock(&s, b, next) - if logProgs { + if f.PrintOrHtmlSSA { for ; x != s.pp.next; x = x.Link { progToBlock[x] = b } @@ -5136,7 +5135,7 @@ func genssa(f *ssa.Func, pp *Progs) { } } - if logProgs { + if e.log { // spew to stdout filename := "" for p := pp.Text; p != nil; p = p.Link { if p.Pos.IsKnown() && p.InnermostFilename() != filename { @@ -5155,7 +5154,7 @@ func genssa(f *ssa.Func, pp *Progs) { f.Logf(" %-6s\t%.5d (%s)\t%s\n", s, p.Pc, p.InnermostLineNumber(), p.InstructionString()) } } - if f.HTMLWriter != nil { + if f.HTMLWriter != nil { // spew to ssa.html var buf bytes.Buffer buf.WriteString("") buf.WriteString("

    ") diff --git a/src/cmd/compile/internal/ssa/debug.go b/src/cmd/compile/internal/ssa/debug.go index c1fbdcc517..8df8a94b76 100644 --- a/src/cmd/compile/internal/ssa/debug.go +++ b/src/cmd/compile/internal/ssa/debug.go @@ -153,8 +153,12 @@ var BlockEnd = &Value{ // RegisterSet is a bitmap of registers, indexed by Register.num. type RegisterSet uint64 +// logf prints debug-specific logging to stdout (always stdout) if the current +// function is tagged by GOSSAFUNC (for ssa output directed either to stdout or html). func (s *debugState) logf(msg string, args ...interface{}) { - s.f.Logf(msg, args...) + if s.f.PrintOrHtmlSSA { + fmt.Printf(msg, args...) + } } type debugState struct { diff --git a/src/cmd/compile/internal/ssa/func.go b/src/cmd/compile/internal/ssa/func.go index eb5775efcb..2ed4086fd1 100644 --- a/src/cmd/compile/internal/ssa/func.go +++ b/src/cmd/compile/internal/ssa/func.go @@ -37,9 +37,10 @@ type Func struct { // Given an environment variable used for debug hash match, // what file (if any) receives the yes/no logging? - logfiles map[string]writeSyncer - HTMLWriter *HTMLWriter // html writer, for debugging - DebugTest bool // default true unless $GOSSAHASH != ""; as a debugging aid, make new code conditional on this and use GOSSAHASH to binary search for failing cases + logfiles map[string]writeSyncer + HTMLWriter *HTMLWriter // html writer, for debugging + DebugTest bool // default true unless $GOSSAHASH != ""; as a debugging aid, make new code conditional on this and use GOSSAHASH to binary search for failing cases + PrintOrHtmlSSA bool // true if GOSSAFUNC matches, true even if fe.Log() (spew phase results to stdout) is false. scheduled bool // Values in Blocks are in final order NoSplit bool // true if function is marked as nosplit. Used by schedule check pass. From 835f983da6866deec1c6550555c96de729c8848c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= Date: Fri, 28 Sep 2018 15:57:27 +0200 Subject: [PATCH 092/240] os: add AIX operating system This commit adds AIX operating system to os package for ppc64 architecture. Updates: #25893 Change-Id: Ieb9a2b3ac5b9abd3b5ab68eb732c17b6256d624d Reviewed-on: https://go-review.googlesource.com/c/138725 Reviewed-by: Brad Fitzpatrick Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- src/os/dir_unix.go | 2 +- src/os/env_unix_test.go | 2 +- src/os/error_posix.go | 2 +- src/os/error_unix.go | 2 +- src/os/error_unix_test.go | 2 +- src/os/exec/exec_posix_test.go | 2 +- src/os/exec/lp_unix.go | 2 +- src/os/exec/lp_unix_test.go | 2 +- src/os/exec_posix.go | 2 +- src/os/exec_unix.go | 2 +- src/os/executable_path.go | 2 +- src/os/file_posix.go | 2 +- src/os/file_unix.go | 2 +- src/os/os_unix_test.go | 2 +- src/os/path_unix.go | 2 +- src/os/pipe_bsd.go | 2 +- src/os/signal/internal/pty/pty.go | 2 +- src/os/signal/signal_test.go | 2 +- src/os/signal/signal_unix.go | 2 +- src/os/stat_aix.go | 51 +++++++++++++++++++++++++++++++ src/os/stat_unix.go | 2 +- src/os/sys_aix.go | 26 ++++++++++++++++ src/os/sys_unix.go | 2 +- src/os/user/cgo_lookup_unix.go | 2 +- src/os/user/lookup_stubs.go | 4 +-- src/os/user/lookup_unix.go | 2 +- src/os/user/lookup_unix_test.go | 2 +- src/os/wait_unimp.go | 2 +- 28 files changed, 104 insertions(+), 27 deletions(-) create mode 100644 src/os/stat_aix.go create mode 100644 src/os/sys_aix.go diff --git a/src/os/dir_unix.go b/src/os/dir_unix.go index 79d61c783f..7a3ef47ce2 100644 --- a/src/os/dir_unix.go +++ b/src/os/dir_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris package os diff --git a/src/os/env_unix_test.go b/src/os/env_unix_test.go index f7b67ebbb8..89430b3e20 100644 --- a/src/os/env_unix_test.go +++ b/src/os/env_unix_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris package os_test diff --git a/src/os/error_posix.go b/src/os/error_posix.go index 3c81b41706..0478ba676a 100644 --- a/src/os/error_posix.go +++ b/src/os/error_posix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows package os diff --git a/src/os/error_unix.go b/src/os/error_unix.go index a9d798b391..bb6bbcc1e6 100644 --- a/src/os/error_unix.go +++ b/src/os/error_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris package os diff --git a/src/os/error_unix_test.go b/src/os/error_unix_test.go index 8db98676d1..c47af56332 100644 --- a/src/os/error_unix_test.go +++ b/src/os/error_unix_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris package os_test diff --git a/src/os/exec/exec_posix_test.go b/src/os/exec/exec_posix_test.go index 865b6c3ced..46799cdbdb 100644 --- a/src/os/exec/exec_posix_test.go +++ b/src/os/exec/exec_posix_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris package exec_test diff --git a/src/os/exec/lp_unix.go b/src/os/exec/lp_unix.go index e098ff8e1d..799e0b4eeb 100644 --- a/src/os/exec/lp_unix.go +++ b/src/os/exec/lp_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux nacl netbsd openbsd solaris package exec diff --git a/src/os/exec/lp_unix_test.go b/src/os/exec/lp_unix_test.go index d467acf5db..e4656cafb8 100644 --- a/src/os/exec/lp_unix_test.go +++ b/src/os/exec/lp_unix_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris package exec diff --git a/src/os/exec_posix.go b/src/os/exec_posix.go index e837e1c4d9..1e60365dba 100644 --- a/src/os/exec_posix.go +++ b/src/os/exec_posix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows package os diff --git a/src/os/exec_unix.go b/src/os/exec_unix.go index b07543e550..abae5a2feb 100644 --- a/src/os/exec_unix.go +++ b/src/os/exec_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris package os diff --git a/src/os/executable_path.go b/src/os/executable_path.go index 057e6a72f4..7b8b83652c 100644 --- a/src/os/executable_path.go +++ b/src/os/executable_path.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build openbsd +// +build aix openbsd package os diff --git a/src/os/file_posix.go b/src/os/file_posix.go index 7cfafc8fde..544d0ad55d 100644 --- a/src/os/file_posix.go +++ b/src/os/file_posix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows package os diff --git a/src/os/file_unix.go b/src/os/file_unix.go index cb90b70735..0ca34b070d 100644 --- a/src/os/file_unix.go +++ b/src/os/file_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris package os diff --git a/src/os/os_unix_test.go b/src/os/os_unix_test.go index 1077d78613..0317f7257e 100644 --- a/src/os/os_unix_test.go +++ b/src/os/os_unix_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris package os_test diff --git a/src/os/path_unix.go b/src/os/path_unix.go index b2e0bca0df..3cb0e3acc4 100644 --- a/src/os/path_unix.go +++ b/src/os/path_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris package os diff --git a/src/os/pipe_bsd.go b/src/os/pipe_bsd.go index 9735988f32..dc4c951a28 100644 --- a/src/os/pipe_bsd.go +++ b/src/os/pipe_bsd.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly js,wasm nacl solaris +// +build aix darwin dragonfly js,wasm nacl solaris package os diff --git a/src/os/signal/internal/pty/pty.go b/src/os/signal/internal/pty/pty.go index c4c1567fce..c1c7fcffc5 100644 --- a/src/os/signal/internal/pty/pty.go +++ b/src/os/signal/internal/pty/pty.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux,!android netbsd openbsd +// +build aix darwin dragonfly freebsd linux,!android netbsd openbsd // +build cgo // Package pty is a simple pseudo-terminal package for Unix systems, diff --git a/src/os/signal/signal_test.go b/src/os/signal/signal_test.go index 3d79c7a861..ecb05fd16c 100644 --- a/src/os/signal/signal_test.go +++ b/src/os/signal/signal_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris package signal diff --git a/src/os/signal/signal_unix.go b/src/os/signal/signal_unix.go index 28fbb54995..7fa634f15a 100644 --- a/src/os/signal/signal_unix.go +++ b/src/os/signal/signal_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows package signal diff --git a/src/os/stat_aix.go b/src/os/stat_aix.go new file mode 100644 index 0000000000..a37c9fdae4 --- /dev/null +++ b/src/os/stat_aix.go @@ -0,0 +1,51 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package os + +import ( + "syscall" + "time" +) + +func fillFileStatFromSys(fs *fileStat, name string) { + fs.name = basename(name) + fs.size = int64(fs.sys.Size) + fs.modTime = stTimespecToTime(fs.sys.Mtim) + fs.mode = FileMode(fs.sys.Mode & 0777) + switch fs.sys.Mode & syscall.S_IFMT { + case syscall.S_IFBLK: + fs.mode |= ModeDevice + case syscall.S_IFCHR: + fs.mode |= ModeDevice | ModeCharDevice + case syscall.S_IFDIR: + fs.mode |= ModeDir + case syscall.S_IFIFO: + fs.mode |= ModeNamedPipe + case syscall.S_IFLNK: + fs.mode |= ModeSymlink + case syscall.S_IFREG: + // nothing to do + case syscall.S_IFSOCK: + fs.mode |= ModeSocket + } + if fs.sys.Mode&syscall.S_ISGID != 0 { + fs.mode |= ModeSetgid + } + if fs.sys.Mode&syscall.S_ISUID != 0 { + fs.mode |= ModeSetuid + } + if fs.sys.Mode&syscall.S_ISVTX != 0 { + fs.mode |= ModeSticky + } +} + +func stTimespecToTime(ts syscall.StTimespec_t) time.Time { + return time.Unix(int64(ts.Sec), int64(ts.Nsec)) +} + +// For testing. +func atime(fi FileInfo) time.Time { + return stTimespecToTime(fi.Sys().(*syscall.Stat_t).Atim) +} diff --git a/src/os/stat_unix.go b/src/os/stat_unix.go index 856b49929f..4f85dcea07 100644 --- a/src/os/stat_unix.go +++ b/src/os/stat_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris package os diff --git a/src/os/sys_aix.go b/src/os/sys_aix.go new file mode 100644 index 0000000000..53a40f2677 --- /dev/null +++ b/src/os/sys_aix.go @@ -0,0 +1,26 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package os + +import "syscall" + +// gethostname syscall cannot be used because it also returns the domain. +// Therefore, hostname is retrieve with uname syscall and the Nodename field. + +func hostname() (name string, err error) { + var u syscall.Utsname + if errno := syscall.Uname(&u); errno != nil { + return "", NewSyscallError("uname", errno) + } + b := make([]byte, len(u.Nodename)) + i := 0 + for ; i < len(u.Nodename); i++ { + if u.Nodename[i] == 0 { + break + } + b[i] = byte(u.Nodename[i]) + } + return string(b[:i]), nil +} diff --git a/src/os/sys_unix.go b/src/os/sys_unix.go index 3c63c10409..8491bad242 100644 --- a/src/os/sys_unix.go +++ b/src/os/sys_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris package os diff --git a/src/os/user/cgo_lookup_unix.go b/src/os/user/cgo_lookup_unix.go index ccb2278246..856ed28de8 100644 --- a/src/os/user/cgo_lookup_unix.go +++ b/src/os/user/cgo_lookup_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd !android,linux netbsd openbsd solaris +// +build aix darwin dragonfly freebsd !android,linux netbsd openbsd solaris // +build cgo,!osusergo package user diff --git a/src/os/user/lookup_stubs.go b/src/os/user/lookup_stubs.go index 9fc03c65d9..61bf1dc7a6 100644 --- a/src/os/user/lookup_stubs.go +++ b/src/os/user/lookup_stubs.go @@ -65,8 +65,8 @@ func current() (*User, error) { } func listGroups(*User) ([]string, error) { - if runtime.GOOS == "android" { - return nil, errors.New("user: GroupIds not implemented on Android") + if runtime.GOOS == "android" || runtime.GOOS == "aix" { + return nil, errors.New(fmt.Sprintf("user: GroupIds not implemented on %s", runtime.GOOS)) } return nil, errors.New("user: GroupIds requires cgo") } diff --git a/src/os/user/lookup_unix.go b/src/os/user/lookup_unix.go index c4e9ba1e81..be62f4d0c3 100644 --- a/src/os/user/lookup_unix.go +++ b/src/os/user/lookup_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js,wasm !android,linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js,wasm !android,linux nacl netbsd openbsd solaris // +build !cgo osusergo package user diff --git a/src/os/user/lookup_unix_test.go b/src/os/user/lookup_unix_test.go index 02c88ab875..65fe0656de 100644 --- a/src/os/user/lookup_unix_test.go +++ b/src/os/user/lookup_unix_test.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd !android,linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd !android,linux nacl netbsd openbsd solaris // +build !cgo package user diff --git a/src/os/wait_unimp.go b/src/os/wait_unimp.go index 3d8210f5bd..d070604600 100644 --- a/src/os/wait_unimp.go +++ b/src/os/wait_unimp.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly js,wasm nacl netbsd openbsd solaris +// +build aix darwin dragonfly js,wasm nacl netbsd openbsd solaris package os From 689321e1087180ef8e823bee7befe4609d67b727 Mon Sep 17 00:00:00 2001 From: Florian Date: Wed, 3 Oct 2018 15:31:35 +0000 Subject: [PATCH 093/240] doc: add link to the Go Discord forum I've linked the gophers discord. It's a well administered discord which already got many members, but it was never officially linked. For many people it's a quality proof if a discord is linked on the official page. I think there are much more people out there, who would prefer to use discord instead of slack or irc. The discord already got many users without even being promoted, so it's very likely there are many people who are interested in a discord, but they don't want to use unofficial discords. This discord shouldn't be seen as a competitor for the slack, it's a platform for those, who don't want to use slack. Change-Id: Ib1ee7173f394b810f5cccf67b498485ecbf8a7db GitHub-Last-Rev: 286ebad994a52f55b685deeda8a86cfac4a9964b GitHub-Pull-Request: golang/go#24176 Reviewed-on: https://go-review.googlesource.com/c/97718 Reviewed-by: Andrew Bonventre Reviewed-by: Brad Fitzpatrick --- doc/help.html | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/doc/help.html b/doc/help.html index f668196871..f11e286904 100644 --- a/doc/help.html +++ b/doc/help.html @@ -27,6 +27,11 @@ The Go Forum is a discussion forum for Go programmers.

    +

    Gophers Discord

    +

    +Get live support and talk with other gophers on the Go Discord. +

    +

    Gopher Slack

    Get live support from other users in the Go slack channel.

    From e2d70b8b4b7a9450b66e3516f36e75f46b7fb80f Mon Sep 17 00:00:00 2001 From: Russ Cox Date: Wed, 3 Oct 2018 20:28:47 -0400 Subject: [PATCH 094/240] regexp: simplify BenchmarkCompileOnepass One benchmark is fine. Having one per test case is overkill. Change-Id: Id4ce789484dab1e79026bdd23cbcd63b2eaceb3f Reviewed-on: https://go-review.googlesource.com/c/139777 Run-TryBot: Russ Cox Reviewed-by: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- src/regexp/onepass_test.go | 20 +++++--------------- 1 file changed, 5 insertions(+), 15 deletions(-) diff --git a/src/regexp/onepass_test.go b/src/regexp/onepass_test.go index b1caa44515..6b622ac356 100644 --- a/src/regexp/onepass_test.go +++ b/src/regexp/onepass_test.go @@ -227,21 +227,11 @@ func TestRunOnePass(t *testing.T) { } func BenchmarkCompileOnepass(b *testing.B) { - for _, test := range onePassTests { - if test.onePass == notOnePass { - continue + b.ReportAllocs() + const re = `^a.[l-nA-Cg-j]?e$` + for i := 0; i < b.N; i++ { + if _, err := Compile(re); err != nil { + b.Fatal(err) } - name := test.re - if len(name) > 20 { - name = name[:20] + "..." - } - b.Run(name, func(b *testing.B) { - b.ReportAllocs() - for i := 0; i < b.N; i++ { - if _, err := Compile(test.re); err != nil { - b.Fatal(err) - } - } - }) } } From 872a5479574f11d7ebe78118226f2a423e89c993 Mon Sep 17 00:00:00 2001 From: Russ Cox Date: Tue, 2 Oct 2018 09:09:10 -0400 Subject: [PATCH 095/240] regexp: fix BenchmarkMatch_onepass_regex This benchmark - in contrast to all other benchmarks - was running the regexp match on 1-byte substrings of the input instead of the entire input. Worse, it was doing so by preallocating a slice of slices of every 1-byte substring. Needless to say, this does not accurately reflect what happens when the regexp matcher is given a large input. Change-Id: Icd5b95f0e43f554a6b93164916745941366e03d6 Reviewed-on: https://go-review.googlesource.com/c/139778 Run-TryBot: Russ Cox Reviewed-by: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- src/regexp/exec_test.go | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/src/regexp/exec_test.go b/src/regexp/exec_test.go index 5f8e747b17..02258e6e74 100644 --- a/src/regexp/exec_test.go +++ b/src/regexp/exec_test.go @@ -692,18 +692,12 @@ func BenchmarkMatch_onepass_regex(b *testing.B) { continue } t := makeText(size.n) - bs := make([][]byte, len(t)) - for i, s := range t { - bs[i] = []byte{s} - } b.Run(size.name, func(b *testing.B) { b.SetBytes(int64(size.n)) b.ReportAllocs() for i := 0; i < b.N; i++ { - for _, byts := range bs { - if !r.Match(byts) { - b.Fatal("not match!") - } + if !r.Match(t) { + b.Fatal("not match!") } } }) From 76f578459a3db0153237816a7513497092463aae Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Wed, 10 Oct 2018 17:19:29 -0700 Subject: [PATCH 096/240] go/types: use correct receiver types for embedded interface methods Interface methods don't declare a receiver (it's implicit), but after type-checking the respective *types.Func objects are marked as methods by having a receiver. For interface methods, the receiver base type used to be the interface that declared the method in the first place, even if the method also appeared in other interfaces via embedding. A change in the computation of method sets for interfaces for Go1.10 changed that inadvertently, with the consequence that sometimes a method's receiver type ended up being an interface into which the method was embedded. The exact behavior also depended on file type-checking order, and because files are sometimes sorted by name, the behavior depended on file names. This didn't matter for type-checking (the typechecker doesn't need the receiver), but it matters for clients, and for printing of methods. This change fixes interface method receivers at the end of type-checking when we have all relevant information. Fixes #28005. Change-Id: I96c120fb0e517d7f8a14b8530f0273674569d5ea Reviewed-on: https://go-review.googlesource.com/c/141358 Reviewed-by: Alan Donovan --- src/go/types/issues_test.go | 67 +++++++++++++++++++++++++++++++++++++ src/go/types/typexpr.go | 27 +++++++++++++-- 2 files changed, 92 insertions(+), 2 deletions(-) diff --git a/src/go/types/issues_test.go b/src/go/types/issues_test.go index 8560bb9b7d..f8810b6734 100644 --- a/src/go/types/issues_test.go +++ b/src/go/types/issues_test.go @@ -355,3 +355,70 @@ func TestIssue25627(t *testing.T) { }) } } + +func TestIssue28005(t *testing.T) { + // method names must match defining interface name for this test + // (see last comment in this function) + sources := [...]string{ + "package p; type A interface{ A() }", + "package p; type B interface{ B() }", + "package p; type X interface{ A; B }", + } + + // compute original file ASTs + var orig [len(sources)]*ast.File + for i, src := range sources { + f, err := parser.ParseFile(fset, "", src, 0) + if err != nil { + t.Fatal(err) + } + orig[i] = f + } + + // run the test for all order permutations of the incoming files + for _, perm := range [][len(sources)]int{ + {0, 1, 2}, + {0, 2, 1}, + {1, 0, 2}, + {1, 2, 0}, + {2, 0, 1}, + {2, 1, 0}, + } { + // create file order permutation + files := make([]*ast.File, len(sources)) + for i := range perm { + files[i] = orig[perm[i]] + } + + // type-check package with given file order permutation + var conf Config + info := &Info{Defs: make(map[*ast.Ident]Object)} + _, err := conf.Check("", fset, files, info) + if err != nil { + t.Fatal(err) + } + + // look for interface object X + var obj Object + for name, def := range info.Defs { + if name.Name == "X" { + obj = def + break + } + } + if obj == nil { + t.Fatal("interface not found") + } + iface := obj.Type().Underlying().(*Interface) // I must be an interface + + // Each iface method m is embedded; and m's receiver base type name + // must match the method's name per the choice in the source file. + for i := 0; i < iface.NumMethods(); i++ { + m := iface.Method(i) + recvName := m.Type().(*Signature).Recv().Type().(*Named).Obj().Name() + if recvName != m.Name() { + t.Errorf("perm %v: got recv %s; want %s", perm, recvName, m.Name()) + } + } + } +} diff --git a/src/go/types/typexpr.go b/src/go/types/typexpr.go index 0f23345792..e6d61b7ec7 100644 --- a/src/go/types/typexpr.go +++ b/src/go/types/typexpr.go @@ -549,6 +549,15 @@ func (check *Checker) interfaceType(ityp *Interface, iface *ast.InterfaceType, d recvTyp = def } + // Correct receiver type for all methods explicitly declared + // by this interface after we're done with type-checking at + // this level. See comment below for details. + check.later(func() { + for _, m := range ityp.methods { + m.typ.(*Signature).recv.typ = recvTyp + } + }) + // collect methods var sigfix []*methodInfo for i, minfo := range info.methods { @@ -562,8 +571,22 @@ func (check *Checker) interfaceType(ityp *Interface, iface *ast.InterfaceType, d // its position, and because interface method // signatures don't get a receiver via regular // type-checking (there isn't a receiver in the - // method's AST). Setting the correct receiver - // type is also important for ptrRecv() (see methodset.go). + // method's AST). Setting the receiver type is + // also important for ptrRecv() (see methodset.go). + // + // Note: For embedded methods, the receiver type + // should be the type of the interface that declared + // the methods in the first place. Since we get the + // methods here via methodInfo, which may be computed + // before we have all relevant interface types, we use + // the current interface's type (recvType). This may be + // the type of the interface embedding the interface that + // declared the methods. This doesn't matter for type- + // checking (we only care about the receiver type for + // the ptrRecv predicate, and it's never a pointer recv + // for interfaces), but it matters for go/types clients + // and for printing. We correct the receiver after type- + // checking. // // TODO(gri) Consider marking methods signatures // as incomplete, for better error messages. See From 7fb60eb1a2aaed7a801ab15bd7aaeaabdbb5e5db Mon Sep 17 00:00:00 2001 From: Ian Davis Date: Fri, 5 Oct 2018 10:07:29 +0100 Subject: [PATCH 097/240] cmd/vet: detect non-pointer arguments for unmarshal and decode MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Checks usage of Unmarshal and Decode functions in json, gob and xml packages to detect attempts to decode into non-pointer types. Fixes #27564 Change-Id: I07bbd5be82d61834ffde9af9937329d7fb1f05d0 Reviewed-on: https://go-review.googlesource.com/c/139997 Run-TryBot: Daniel Martí TryBot-Result: Gobot Gobot Reviewed-by: Alan Donovan --- src/cmd/vet/testdata/unmarshal.go | 60 ++++++++++++++++++++++++++ src/cmd/vet/unmarshal.go | 72 +++++++++++++++++++++++++++++++ 2 files changed, 132 insertions(+) create mode 100644 src/cmd/vet/testdata/unmarshal.go create mode 100644 src/cmd/vet/unmarshal.go diff --git a/src/cmd/vet/testdata/unmarshal.go b/src/cmd/vet/testdata/unmarshal.go new file mode 100644 index 0000000000..f541b4a414 --- /dev/null +++ b/src/cmd/vet/testdata/unmarshal.go @@ -0,0 +1,60 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file contains tests for the unmarshal checker. + +package testdata + +import ( + "bytes" + "encoding/gob" + "encoding/json" + "encoding/xml" + "errors" + "fmt" +) + +func _() { + type t struct { + a int + } + var v t + var r io.Reader + + json.Unmarshal([]byte{}, v) // ERROR "call of Unmarshal passes non-pointer as second argument" + json.Unmarshal([]byte{}, &v) + json.NewDecoder(r).Decode(v) // ERROR "call of Decode passes non-pointer" + json.NewDecoder(r).Decode(&v) + gob.NewDecoder(r).Decode(v) // ERROR "call of Decode passes non-pointer" + gob.NewDecoder(r).Decode(&v) + xml.Unmarshal([]byte{}, v) // ERROR "call of Unmarshal passes non-pointer as second argument" + xml.Unmarshal([]byte{}, &v) + xml.NewDecoder(r).Decode(v) // ERROR "call of Decode passes non-pointer" + xml.NewDecoder(r).Decode(&v) + + var p *t + json.Unmarshal([]byte{}, p) + json.Unmarshal([]byte{}, *p) // ERROR "call of Unmarshal passes non-pointer as second argument" + json.NewDecoder(r).Decode(p) + json.NewDecoder(r).Decode(*p) // ERROR "call of Decode passes non-pointer" + gob.NewDecoder(r).Decode(p) + gob.NewDecoder(r).Decode(*p) // ERROR "call of Decode passes non-pointer" + xml.Unmarshal([]byte{}, p) + xml.Unmarshal([]byte{}, *p) // ERROR "call of Unmarshal passes non-pointer as second argument" + xml.NewDecoder(r).Decode(p) + xml.NewDecoder(r).Decode(*p) // ERROR "call of Decode passes non-pointer" + + var i interface{} + json.Unmarshal([]byte{}, i) + json.NewDecoder(r).Decode(i) + + json.Unmarshal([]byte{}, nil) // ERROR "call of Unmarshal passes non-pointer as second argument" + json.Unmarshal([]byte{}, []t{}) // ERROR "call of Unmarshal passes non-pointer as second argument" + json.Unmarshal([]byte{}, map[string]int{}) // ERROR "call of Unmarshal passes non-pointer as second argument" + json.NewDecoder(r).Decode(nil) // ERROR "call of Decode passes non-pointer" + json.NewDecoder(r).Decode([]t{}) // ERROR "call of Decode passes non-pointer" + json.NewDecoder(r).Decode(map[string]int{}) // ERROR "call of Decode passes non-pointer" + + json.Unmarshal(func() ([]byte, interface{}) { return []byte{}, v }()) +} diff --git a/src/cmd/vet/unmarshal.go b/src/cmd/vet/unmarshal.go new file mode 100644 index 0000000000..3e4c25b6b9 --- /dev/null +++ b/src/cmd/vet/unmarshal.go @@ -0,0 +1,72 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file defines the check for passing non-pointer or non-interface +// types to unmarshal and decode functions. + +package main + +import ( + "go/ast" + "go/types" + "strings" +) + +func init() { + register("unmarshal", + "check for passing non-pointer or non-interface types to unmarshal and decode functions", + checkUnmarshalArg, + callExpr) +} + +var pointerArgFuncs = map[string]int{ + "encoding/json.Unmarshal": 1, + "(*encoding/json.Decoder).Decode": 0, + "(*encoding/gob.Decoder).Decode": 0, + "encoding/xml.Unmarshal": 1, + "(*encoding/xml.Decoder).Decode": 0, +} + +func checkUnmarshalArg(f *File, n ast.Node) { + call, ok := n.(*ast.CallExpr) + if !ok { + return // not a call statement + } + fun := unparen(call.Fun) + + if f.pkg.types[fun].IsType() { + return // a conversion, not a call + } + + info := &types.Info{Uses: f.pkg.uses, Selections: f.pkg.selectors} + name := callName(info, call) + + arg, ok := pointerArgFuncs[name] + if !ok { + return // not a function we are interested in + } + + if len(call.Args) < arg+1 { + return // not enough arguments, e.g. called with return values of another function + } + + typ := f.pkg.types[call.Args[arg]] + + if typ.Type == nil { + return // type error prevents further analysis + } + + switch typ.Type.Underlying().(type) { + case *types.Pointer, *types.Interface: + return + } + + shortname := name[strings.LastIndexByte(name, '.')+1:] + switch arg { + case 0: + f.Badf(call.Lparen, "call of %s passes non-pointer", shortname) + case 1: + f.Badf(call.Lparen, "call of %s passes non-pointer as second argument", shortname) + } +} From f64fd66f24d5c19d26ac58c4027aa9398a935490 Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Wed, 10 Oct 2018 14:13:49 -0700 Subject: [PATCH 098/240] go/scanner: don't return token.INVALID for ".." sequence Per the spec, "...the next token is the longest sequence of characters that form a valid token." Thus, encountering a ".." sequence should return two token.PERIOD tokens rather than a single token.ILLEGAL. Fixes #28112. Change-Id: Iba5da841f40036e53f48f9be23f933f362e67f5e Reviewed-on: https://go-review.googlesource.com/c/141337 Reviewed-by: Dmitri Shuralyov --- src/go/scanner/scanner.go | 20 ++++++++++++++------ src/go/scanner/scanner_test.go | 20 +++++++++++++++++++- 2 files changed, 33 insertions(+), 7 deletions(-) diff --git a/src/go/scanner/scanner.go b/src/go/scanner/scanner.go index 23bbb2885f..e78abf12a2 100644 --- a/src/go/scanner/scanner.go +++ b/src/go/scanner/scanner.go @@ -85,6 +85,15 @@ func (s *Scanner) next() { } } +// peek returns the byte following the most recently read character without +// advancing the scanner. If the scanner is at EOF, peek returns 0. +func (s *Scanner) peek() byte { + if s.rdOffset < len(s.src) { + return s.src[s.rdOffset] + } + return 0 +} + // A mode value is a set of flags (or 0). // They control scanner behavior. // @@ -735,14 +744,13 @@ scanAgain: if '0' <= s.ch && s.ch <= '9' { insertSemi = true tok, lit = s.scanNumber(true) - } else if s.ch == '.' { - s.next() - if s.ch == '.' { - s.next() - tok = token.ELLIPSIS - } } else { tok = token.PERIOD + if s.ch == '.' && s.peek() == '.' { + s.next() + s.next() // consume last '.' + tok = token.ELLIPSIS + } } case ',': tok = token.COMMA diff --git a/src/go/scanner/scanner_test.go b/src/go/scanner/scanner_test.go index 0aad368099..36c962209c 100644 --- a/src/go/scanner/scanner_test.go +++ b/src/go/scanner/scanner_test.go @@ -757,6 +757,7 @@ var errors = []struct { {"\a", token.ILLEGAL, 0, "", "illegal character U+0007"}, {`#`, token.ILLEGAL, 0, "", "illegal character U+0023 '#'"}, {`…`, token.ILLEGAL, 0, "", "illegal character U+2026 '…'"}, + {"..", token.PERIOD, 0, "", ""}, // two periods, not invalid token (issue #28112) {`' '`, token.CHAR, 0, `' '`, ""}, {`''`, token.CHAR, 0, `''`, "illegal rune literal"}, {`'12'`, token.CHAR, 0, `'12'`, "illegal rune literal"}, @@ -822,7 +823,7 @@ func TestScanErrors(t *testing.T) { // Verify that no comments show up as literal values when skipping comments. func TestIssue10213(t *testing.T) { - var src = ` + const src = ` var ( A = 1 // foo ) @@ -855,6 +856,23 @@ func TestIssue10213(t *testing.T) { } } +func TestIssue28112(t *testing.T) { + const src = "... .. 0.. .." // make sure to have stand-alone ".." immediately before EOF to test EOF behavior + tokens := []token.Token{token.ELLIPSIS, token.PERIOD, token.PERIOD, token.FLOAT, token.PERIOD, token.PERIOD, token.PERIOD, token.EOF} + var s Scanner + s.Init(fset.AddFile("", fset.Base(), len(src)), []byte(src), nil, 0) + for _, want := range tokens { + pos, got, lit := s.Scan() + if got != want { + t.Errorf("%s: got %s, want %s", fset.Position(pos), got, want) + } + // literals expect to have a (non-empty) literal string and we don't care about other tokens for this test + if tokenclass(got) == literal && lit == "" { + t.Errorf("%s: for %s got empty literal string", fset.Position(pos), got) + } + } +} + func BenchmarkScan(b *testing.B) { b.StopTimer() fset := token.NewFileSet() From 28fbbf41119a75498cc5e81d06af5ca1ad0010c9 Mon Sep 17 00:00:00 2001 From: Matthew Dempsky Date: Wed, 10 Oct 2018 16:47:47 -0700 Subject: [PATCH 099/240] cmd/compile/internal/gc: remove OCMPIFACE and OCMPSTR Interface and string comparisons don't need separate Ops any more than struct or array comparisons do. Removing them requires shuffling some code around in walk (and a little in order), but overall allows simplifying things a bit. Passes toolstash-check. Change-Id: I084b8a6c089b768dc76d220379f4daed8a35db15 Reviewed-on: https://go-review.googlesource.com/c/141637 Run-TryBot: Matthew Dempsky Reviewed-by: Brad Fitzpatrick Reviewed-by: Robert Griesemer TryBot-Result: Gobot Gobot --- src/cmd/compile/internal/gc/const.go | 4 +- src/cmd/compile/internal/gc/fmt.go | 7 - src/cmd/compile/internal/gc/iexport.go | 6 - src/cmd/compile/internal/gc/iimport.go | 3 - src/cmd/compile/internal/gc/order.go | 31 +- src/cmd/compile/internal/gc/syntax.go | 8 +- src/cmd/compile/internal/gc/typecheck.go | 47 +-- src/cmd/compile/internal/gc/walk.go | 395 ++++++++++++----------- 8 files changed, 235 insertions(+), 266 deletions(-) diff --git a/src/cmd/compile/internal/gc/const.go b/src/cmd/compile/internal/gc/const.go index e60e05df04..3c542aafae 100644 --- a/src/cmd/compile/internal/gc/const.go +++ b/src/cmd/compile/internal/gc/const.go @@ -1058,9 +1058,7 @@ func idealkind(n *Node) Ctype { OLT, ONE, ONOT, - OOROR, - OCMPSTR, - OCMPIFACE: + OOROR: return CTBOOL // shifts (beware!). diff --git a/src/cmd/compile/internal/gc/fmt.go b/src/cmd/compile/internal/gc/fmt.go index 28e9b9b6dc..23ed3f7844 100644 --- a/src/cmd/compile/internal/gc/fmt.go +++ b/src/cmd/compile/internal/gc/fmt.go @@ -1146,8 +1146,6 @@ var opprec = []int{ OGE: 4, OGT: 4, ONE: 4, - OCMPSTR: 4, - OCMPIFACE: 4, OSEND: 3, OANDAND: 2, OOROR: 1, @@ -1507,11 +1505,6 @@ func (n *Node) exprfmt(s fmt.State, prec int, mode fmtMode) { n1.exprfmt(s, nprec, mode) } - case OCMPSTR, OCMPIFACE: - n.Left.exprfmt(s, nprec, mode) - mode.Fprintf(s, " %#v ", n.SubOp()) - n.Right.exprfmt(s, nprec+1, mode) - default: mode.Fprintf(s, "", n.Op) } diff --git a/src/cmd/compile/internal/gc/iexport.go b/src/cmd/compile/internal/gc/iexport.go index d90c97ad92..b141e5fc09 100644 --- a/src/cmd/compile/internal/gc/iexport.go +++ b/src/cmd/compile/internal/gc/iexport.go @@ -1319,12 +1319,6 @@ func (w *exportWriter) expr(n *Node) { w.pos(n.Pos) w.exprList(n.List) - case OCMPSTR, OCMPIFACE: - w.op(n.SubOp()) - w.pos(n.Pos) - w.expr(n.Left) - w.expr(n.Right) - case ODCLCONST: // if exporting, DCLCONST should just be removed as its usage // has already been replaced with literals diff --git a/src/cmd/compile/internal/gc/iimport.go b/src/cmd/compile/internal/gc/iimport.go index 6f0fd6b6d2..4fea314263 100644 --- a/src/cmd/compile/internal/gc/iimport.go +++ b/src/cmd/compile/internal/gc/iimport.go @@ -935,9 +935,6 @@ func (r *importReader) node() *Node { } return x - // case OCMPSTR, OCMPIFACE: - // unreachable - mapped to std comparison operators by exporter - // -------------------------------------------------------------------- // statements case ODCL: diff --git a/src/cmd/compile/internal/gc/order.go b/src/cmd/compile/internal/gc/order.go index 1e22ecfcdf..8afb136515 100644 --- a/src/cmd/compile/internal/gc/order.go +++ b/src/cmd/compile/internal/gc/order.go @@ -1010,20 +1010,6 @@ func (o *Order) expr(n, lhs *Node) *Node { } } - case OCMPSTR: - n.Left = o.expr(n.Left, nil) - n.Right = o.expr(n.Right, nil) - - // Mark string(byteSlice) arguments to reuse byteSlice backing - // buffer during conversion. String comparison does not - // memorize the strings for later use, so it is safe. - if n.Left.Op == OARRAYBYTESTR { - n.Left.Op = OARRAYBYTESTRTMP - } - if n.Right.Op == OARRAYBYTESTR { - n.Right.Op = OARRAYBYTESTRTMP - } - // key must be addressable case OINDEXMAP: n.Left = o.expr(n.Left, nil) @@ -1181,11 +1167,24 @@ func (o *Order) expr(n, lhs *Node) *Node { n.Left = o.expr(n.Left, nil) n = o.copyExpr(n, n.Type, true) - case OEQ, ONE: + case OEQ, ONE, OLT, OLE, OGT, OGE: n.Left = o.expr(n.Left, nil) n.Right = o.expr(n.Right, nil) + t := n.Left.Type - if t.IsStruct() || t.IsArray() { + switch { + case t.IsString(): + // Mark string(byteSlice) arguments to reuse byteSlice backing + // buffer during conversion. String comparison does not + // memorize the strings for later use, so it is safe. + if n.Left.Op == OARRAYBYTESTR { + n.Left.Op = OARRAYBYTESTRTMP + } + if n.Right.Op == OARRAYBYTESTR { + n.Right.Op = OARRAYBYTESTRTMP + } + + case t.IsStruct() || t.IsArray(): // for complex comparisons, we need both args to be // addressable so we can pass them to the runtime. n.Left = o.addrTemp(n.Left) diff --git a/src/cmd/compile/internal/gc/syntax.go b/src/cmd/compile/internal/gc/syntax.go index ab65ddebb4..1368d5edb8 100644 --- a/src/cmd/compile/internal/gc/syntax.go +++ b/src/cmd/compile/internal/gc/syntax.go @@ -65,7 +65,7 @@ func (n *Node) ResetAux() { func (n *Node) SubOp() Op { switch n.Op { - case OASOP, OCMPIFACE, OCMPSTR, ONAME: + case OASOP, ONAME: default: Fatalf("unexpected op: %v", n.Op) } @@ -74,7 +74,7 @@ func (n *Node) SubOp() Op { func (n *Node) SetSubOp(op Op) { switch n.Op { - case OASOP, OCMPIFACE, OCMPSTR, ONAME: + case OASOP, ONAME: default: Fatalf("unexpected op: %v", n.Op) } @@ -610,8 +610,8 @@ const ( OCAP // cap(Left) OCLOSE // close(Left) OCLOSURE // func Type { Body } (func literal) - OCMPIFACE // Left Etype Right (interface comparison, x == y or x != y) - OCMPSTR // Left Etype Right (string comparison, x == y, x < y, etc) + _ // toolstash kludge; was OCMPIFACE + _ // toolstash kludge; was OCMPSTR OCOMPLIT // Right{List} (composite literal, not yet lowered to specific form) OMAPLIT // Type{List} (composite literal, Type is map) OSTRUCTLIT // Type{List} (composite literal, Type is struct) diff --git a/src/cmd/compile/internal/gc/typecheck.go b/src/cmd/compile/internal/gc/typecheck.go index 897dd710b9..cfdd88d45e 100644 --- a/src/cmd/compile/internal/gc/typecheck.go +++ b/src/cmd/compile/internal/gc/typecheck.go @@ -747,43 +747,22 @@ func typecheck1(n *Node, top int) *Node { } } - if et == TSTRING { - if iscmp[n.Op] { - ot := n.Op - n.Op = OCMPSTR - n.SetSubOp(ot) - } else if n.Op == OADD { - // create OADDSTR node with list of strings in x + y + z + (w + v) + ... - n.Op = OADDSTR + if et == TSTRING && n.Op == OADD { + // create OADDSTR node with list of strings in x + y + z + (w + v) + ... + n.Op = OADDSTR - if l.Op == OADDSTR { - n.List.Set(l.List.Slice()) - } else { - n.List.Set1(l) - } - if r.Op == OADDSTR { - n.List.AppendNodes(&r.List) - } else { - n.List.Append(r) - } - n.Left = nil - n.Right = nil + if l.Op == OADDSTR { + n.List.Set(l.List.Slice()) + } else { + n.List.Set1(l) } - } - - if et == TINTER { - if l.Op == OLITERAL && l.Val().Ctype() == CTNIL { - // swap for back end - n.Left = r - - n.Right = l - } else if r.Op == OLITERAL && r.Val().Ctype() == CTNIL { - } else // leave alone for back end - if r.Type.IsInterface() == l.Type.IsInterface() { - ot := n.Op - n.Op = OCMPIFACE - n.SetSubOp(ot) + if r.Op == OADDSTR { + n.List.AppendNodes(&r.List) + } else { + n.List.Append(r) } + n.Left = nil + n.Right = nil } if (op == ODIV || op == OMOD) && Isconst(r, CTINT) { diff --git a/src/cmd/compile/internal/gc/walk.go b/src/cmd/compile/internal/gc/walk.go index c3201c1404..6b9ec51203 100644 --- a/src/cmd/compile/internal/gc/walk.go +++ b/src/cmd/compile/internal/gc/walk.go @@ -514,7 +514,7 @@ opswitch: OIND, OSPTR, OITAB, OIDATA, OADDR: n.Left = walkexpr(n.Left, init) - case OEFACE, OAND, OSUB, OMUL, OLT, OLE, OGE, OGT, OADD, OOR, OXOR: + case OEFACE, OAND, OSUB, OMUL, OADD, OOR, OXOR: n.Left = walkexpr(n.Left, init) n.Right = walkexpr(n.Right, init) @@ -584,19 +584,8 @@ opswitch: n.Left = walkexpr(n.Left, init) n.Right = walkexpr(n.Right, init) - case OEQ, ONE: - n.Left = walkexpr(n.Left, init) - n.Right = walkexpr(n.Right, init) - - // Disable safemode while compiling this code: the code we - // generate internally can refer to unsafe.Pointer. - // In this case it can happen if we need to generate an == - // for a struct containing a reflect.Value, which itself has - // an unexported field of type unsafe.Pointer. - old_safemode := safemode - safemode = false + case OEQ, ONE, OLT, OLE, OGT, OGE: n = walkcompare(n, init) - safemode = old_safemode case OANDAND, OOROR: n.Left = walkexpr(n.Left, init) @@ -1218,149 +1207,6 @@ opswitch: n = callnew(n.Type.Elem()) } - case OCMPSTR: - // s + "badgerbadgerbadger" == "badgerbadgerbadger" - if (n.SubOp() == OEQ || n.SubOp() == ONE) && Isconst(n.Right, CTSTR) && n.Left.Op == OADDSTR && n.Left.List.Len() == 2 && Isconst(n.Left.List.Second(), CTSTR) && strlit(n.Right) == strlit(n.Left.List.Second()) { - r := nod(n.SubOp(), nod(OLEN, n.Left.List.First(), nil), nodintconst(0)) - n = finishcompare(n, r, init) - break - } - - // Rewrite comparisons to short constant strings as length+byte-wise comparisons. - var cs, ncs *Node // const string, non-const string - switch { - case Isconst(n.Left, CTSTR) && Isconst(n.Right, CTSTR): - // ignore; will be constant evaluated - case Isconst(n.Left, CTSTR): - cs = n.Left - ncs = n.Right - case Isconst(n.Right, CTSTR): - cs = n.Right - ncs = n.Left - } - if cs != nil { - cmp := n.SubOp() - // Our comparison below assumes that the non-constant string - // is on the left hand side, so rewrite "" cmp x to x cmp "". - // See issue 24817. - if Isconst(n.Left, CTSTR) { - cmp = brrev(cmp) - } - - // maxRewriteLen was chosen empirically. - // It is the value that minimizes cmd/go file size - // across most architectures. - // See the commit description for CL 26758 for details. - maxRewriteLen := 6 - // Some architectures can load unaligned byte sequence as 1 word. - // So we can cover longer strings with the same amount of code. - canCombineLoads := canMergeLoads() - combine64bit := false - if canCombineLoads { - // Keep this low enough to generate less code than a function call. - maxRewriteLen = 2 * thearch.LinkArch.RegSize - combine64bit = thearch.LinkArch.RegSize >= 8 - } - - var and Op - switch cmp { - case OEQ: - and = OANDAND - case ONE: - and = OOROR - default: - // Don't do byte-wise comparisons for <, <=, etc. - // They're fairly complicated. - // Length-only checks are ok, though. - maxRewriteLen = 0 - } - if s := cs.Val().U.(string); len(s) <= maxRewriteLen { - if len(s) > 0 { - ncs = safeexpr(ncs, init) - } - r := nod(cmp, nod(OLEN, ncs, nil), nodintconst(int64(len(s)))) - remains := len(s) - for i := 0; remains > 0; { - if remains == 1 || !canCombineLoads { - cb := nodintconst(int64(s[i])) - ncb := nod(OINDEX, ncs, nodintconst(int64(i))) - r = nod(and, r, nod(cmp, ncb, cb)) - remains-- - i++ - continue - } - var step int - var convType *types.Type - switch { - case remains >= 8 && combine64bit: - convType = types.Types[TINT64] - step = 8 - case remains >= 4: - convType = types.Types[TUINT32] - step = 4 - case remains >= 2: - convType = types.Types[TUINT16] - step = 2 - } - ncsubstr := nod(OINDEX, ncs, nodintconst(int64(i))) - ncsubstr = conv(ncsubstr, convType) - csubstr := int64(s[i]) - // Calculate large constant from bytes as sequence of shifts and ors. - // Like this: uint32(s[0]) | uint32(s[1])<<8 | uint32(s[2])<<16 ... - // ssa will combine this into a single large load. - for offset := 1; offset < step; offset++ { - b := nod(OINDEX, ncs, nodintconst(int64(i+offset))) - b = conv(b, convType) - b = nod(OLSH, b, nodintconst(int64(8*offset))) - ncsubstr = nod(OOR, ncsubstr, b) - csubstr |= int64(s[i+offset]) << uint8(8*offset) - } - csubstrPart := nodintconst(csubstr) - // Compare "step" bytes as once - r = nod(and, r, nod(cmp, csubstrPart, ncsubstr)) - remains -= step - i += step - } - n = finishcompare(n, r, init) - break - } - } - - var r *Node - if n.SubOp() == OEQ || n.SubOp() == ONE { - // prepare for rewrite below - n.Left = cheapexpr(n.Left, init) - n.Right = cheapexpr(n.Right, init) - - lstr := conv(n.Left, types.Types[TSTRING]) - rstr := conv(n.Right, types.Types[TSTRING]) - lptr := nod(OSPTR, lstr, nil) - rptr := nod(OSPTR, rstr, nil) - llen := conv(nod(OLEN, lstr, nil), types.Types[TUINTPTR]) - rlen := conv(nod(OLEN, rstr, nil), types.Types[TUINTPTR]) - - fn := syslook("memequal") - fn = substArgTypes(fn, types.Types[TUINT8], types.Types[TUINT8]) - r = mkcall1(fn, types.Types[TBOOL], init, lptr, rptr, llen) - - // quick check of len before full compare for == or !=. - // memequal then tests equality up to length len. - if n.SubOp() == OEQ { - // len(left) == len(right) && memequal(left, right, len) - r = nod(OANDAND, nod(OEQ, llen, rlen), r) - } else { - // len(left) != len(right) || !memequal(left, right, len) - r = nod(ONOT, r, nil) - r = nod(OOROR, nod(ONE, llen, rlen), r) - } - } else { - // sys_cmpstring(s1, s2) :: 0 - r = mkcall("cmpstring", types.Types[TINT], init, conv(n.Left, types.Types[TSTRING]), conv(n.Right, types.Types[TSTRING])) - r = nod(n.SubOp(), r, nodintconst(0)) - } - - n = finishcompare(n, r, init) - case OADDSTR: n = addstr(n, init) @@ -1658,40 +1504,6 @@ opswitch: n = mkcall("stringtoslicerune", n.Type, init, a, conv(n.Left, types.Types[TSTRING])) - // ifaceeq(i1 any-1, i2 any-2) (ret bool); - case OCMPIFACE: - if !eqtype(n.Left.Type, n.Right.Type) { - Fatalf("ifaceeq %v %v %v", n.Op, n.Left.Type, n.Right.Type) - } - var fn *Node - if n.Left.Type.IsEmptyInterface() { - fn = syslook("efaceeq") - } else { - fn = syslook("ifaceeq") - } - - n.Right = cheapexpr(n.Right, init) - n.Left = cheapexpr(n.Left, init) - lt := nod(OITAB, n.Left, nil) - rt := nod(OITAB, n.Right, nil) - ld := nod(OIDATA, n.Left, nil) - rd := nod(OIDATA, n.Right, nil) - ld.Type = types.Types[TUNSAFEPTR] - rd.Type = types.Types[TUNSAFEPTR] - ld.SetTypecheck(1) - rd.SetTypecheck(1) - call := mkcall1(fn, n.Type, init, lt, ld, rd) - - // Check itable/type before full compare. - // Note: short-circuited because order matters. - var cmp *Node - if n.SubOp() == OEQ { - cmp = nod(OANDAND, nod(OEQ, lt, rt), call) - } else { - cmp = nod(OOROR, nod(ONE, lt, rt), nod(ONOT, call, nil)) - } - n = finishcompare(n, cmp, init) - case OARRAYLIT, OSLICELIT, OMAPLIT, OSTRUCTLIT, OPTRLIT: if isStaticCompositeLiteral(n) && !canSSAType(n.Type) { // n can be directly represented in the read-only data section. @@ -3390,7 +3202,7 @@ func eqfor(t *types.Type) (n *Node, needsize bool) { // Should only arrive here with large memory or // a struct/array containing a non-memory field/element. // Small memory is handled inline, and single non-memory - // is handled during type check (OCMPSTR etc). + // is handled by walkcompare. switch a, _ := algtype1(t); a { case AMEM: n := syslook("memequal") @@ -3415,6 +3227,28 @@ func eqfor(t *types.Type) (n *Node, needsize bool) { // The result of walkcompare MUST be assigned back to n, e.g. // n.Left = walkcompare(n.Left, init) func walkcompare(n *Node, init *Nodes) *Node { + if n.Left.Type.IsInterface() && n.Right.Type.IsInterface() && n.Left.Op != OLITERAL && n.Right.Op != OLITERAL { + return walkcompareInterface(n, init) + } + + if n.Left.Type.IsString() && n.Right.Type.IsString() { + return walkcompareString(n, init) + } + + n.Left = walkexpr(n.Left, init) + n.Right = walkexpr(n.Right, init) + + // Disable safemode while compiling this code: the code we + // generate internally can refer to unsafe.Pointer. + // In this case it can happen if we need to generate an == + // for a struct containing a reflect.Value, which itself has + // an unexported field of type unsafe.Pointer. + old_safemode := safemode + safemode = false + defer func() { + safemode = old_safemode + }() + // Given interface value l and concrete value r, rewrite // l == r // into types-equal && data-equal. @@ -3627,6 +3461,183 @@ func walkcompare(n *Node, init *Nodes) *Node { return n } +func walkcompareInterface(n *Node, init *Nodes) *Node { + // ifaceeq(i1 any-1, i2 any-2) (ret bool); + if !eqtype(n.Left.Type, n.Right.Type) { + Fatalf("ifaceeq %v %v %v", n.Op, n.Left.Type, n.Right.Type) + } + var fn *Node + if n.Left.Type.IsEmptyInterface() { + fn = syslook("efaceeq") + } else { + fn = syslook("ifaceeq") + } + + n.Right = cheapexpr(n.Right, init) + n.Left = cheapexpr(n.Left, init) + lt := nod(OITAB, n.Left, nil) + rt := nod(OITAB, n.Right, nil) + ld := nod(OIDATA, n.Left, nil) + rd := nod(OIDATA, n.Right, nil) + ld.Type = types.Types[TUNSAFEPTR] + rd.Type = types.Types[TUNSAFEPTR] + ld.SetTypecheck(1) + rd.SetTypecheck(1) + call := mkcall1(fn, n.Type, init, lt, ld, rd) + + // Check itable/type before full compare. + // Note: short-circuited because order matters. + var cmp *Node + if n.Op == OEQ { + cmp = nod(OANDAND, nod(OEQ, lt, rt), call) + } else { + cmp = nod(OOROR, nod(ONE, lt, rt), nod(ONOT, call, nil)) + } + return finishcompare(n, cmp, init) +} + +func walkcompareString(n *Node, init *Nodes) *Node { + // s + "badgerbadgerbadger" == "badgerbadgerbadger" + if (n.Op == OEQ || n.Op == ONE) && Isconst(n.Right, CTSTR) && n.Left.Op == OADDSTR && n.Left.List.Len() == 2 && Isconst(n.Left.List.Second(), CTSTR) && strlit(n.Right) == strlit(n.Left.List.Second()) { + r := nod(n.Op, nod(OLEN, n.Left.List.First(), nil), nodintconst(0)) + return finishcompare(n, r, init) + } + + // Rewrite comparisons to short constant strings as length+byte-wise comparisons. + var cs, ncs *Node // const string, non-const string + switch { + case Isconst(n.Left, CTSTR) && Isconst(n.Right, CTSTR): + // ignore; will be constant evaluated + case Isconst(n.Left, CTSTR): + cs = n.Left + ncs = n.Right + case Isconst(n.Right, CTSTR): + cs = n.Right + ncs = n.Left + } + if cs != nil { + cmp := n.Op + // Our comparison below assumes that the non-constant string + // is on the left hand side, so rewrite "" cmp x to x cmp "". + // See issue 24817. + if Isconst(n.Left, CTSTR) { + cmp = brrev(cmp) + } + + // maxRewriteLen was chosen empirically. + // It is the value that minimizes cmd/go file size + // across most architectures. + // See the commit description for CL 26758 for details. + maxRewriteLen := 6 + // Some architectures can load unaligned byte sequence as 1 word. + // So we can cover longer strings with the same amount of code. + canCombineLoads := canMergeLoads() + combine64bit := false + if canCombineLoads { + // Keep this low enough to generate less code than a function call. + maxRewriteLen = 2 * thearch.LinkArch.RegSize + combine64bit = thearch.LinkArch.RegSize >= 8 + } + + var and Op + switch cmp { + case OEQ: + and = OANDAND + case ONE: + and = OOROR + default: + // Don't do byte-wise comparisons for <, <=, etc. + // They're fairly complicated. + // Length-only checks are ok, though. + maxRewriteLen = 0 + } + if s := cs.Val().U.(string); len(s) <= maxRewriteLen { + if len(s) > 0 { + ncs = safeexpr(ncs, init) + } + r := nod(cmp, nod(OLEN, ncs, nil), nodintconst(int64(len(s)))) + remains := len(s) + for i := 0; remains > 0; { + if remains == 1 || !canCombineLoads { + cb := nodintconst(int64(s[i])) + ncb := nod(OINDEX, ncs, nodintconst(int64(i))) + r = nod(and, r, nod(cmp, ncb, cb)) + remains-- + i++ + continue + } + var step int + var convType *types.Type + switch { + case remains >= 8 && combine64bit: + convType = types.Types[TINT64] + step = 8 + case remains >= 4: + convType = types.Types[TUINT32] + step = 4 + case remains >= 2: + convType = types.Types[TUINT16] + step = 2 + } + ncsubstr := nod(OINDEX, ncs, nodintconst(int64(i))) + ncsubstr = conv(ncsubstr, convType) + csubstr := int64(s[i]) + // Calculate large constant from bytes as sequence of shifts and ors. + // Like this: uint32(s[0]) | uint32(s[1])<<8 | uint32(s[2])<<16 ... + // ssa will combine this into a single large load. + for offset := 1; offset < step; offset++ { + b := nod(OINDEX, ncs, nodintconst(int64(i+offset))) + b = conv(b, convType) + b = nod(OLSH, b, nodintconst(int64(8*offset))) + ncsubstr = nod(OOR, ncsubstr, b) + csubstr |= int64(s[i+offset]) << uint8(8*offset) + } + csubstrPart := nodintconst(csubstr) + // Compare "step" bytes as once + r = nod(and, r, nod(cmp, csubstrPart, ncsubstr)) + remains -= step + i += step + } + return finishcompare(n, r, init) + } + } + + var r *Node + if n.Op == OEQ || n.Op == ONE { + // prepare for rewrite below + n.Left = cheapexpr(n.Left, init) + n.Right = cheapexpr(n.Right, init) + + lstr := conv(n.Left, types.Types[TSTRING]) + rstr := conv(n.Right, types.Types[TSTRING]) + lptr := nod(OSPTR, lstr, nil) + rptr := nod(OSPTR, rstr, nil) + llen := conv(nod(OLEN, lstr, nil), types.Types[TUINTPTR]) + rlen := conv(nod(OLEN, rstr, nil), types.Types[TUINTPTR]) + + fn := syslook("memequal") + fn = substArgTypes(fn, types.Types[TUINT8], types.Types[TUINT8]) + r = mkcall1(fn, types.Types[TBOOL], init, lptr, rptr, llen) + + // quick check of len before full compare for == or !=. + // memequal then tests equality up to length len. + if n.Op == OEQ { + // len(left) == len(right) && memequal(left, right, len) + r = nod(OANDAND, nod(OEQ, llen, rlen), r) + } else { + // len(left) != len(right) || !memequal(left, right, len) + r = nod(ONOT, r, nil) + r = nod(OOROR, nod(ONE, llen, rlen), r) + } + } else { + // sys_cmpstring(s1, s2) :: 0 + r = mkcall("cmpstring", types.Types[TINT], init, conv(n.Left, types.Types[TSTRING]), conv(n.Right, types.Types[TSTRING])) + r = nod(n.Op, r, nodintconst(0)) + } + + return finishcompare(n, r, init) +} + // The result of finishcompare MUST be assigned back to n, e.g. // n.Left = finishcompare(n.Left, x, r, init) func finishcompare(n, r *Node, init *Nodes) *Node { @@ -3961,8 +3972,6 @@ func candiscard(n *Node) bool { OSTRARRAYBYTE, OSTRARRAYRUNE, OCAP, - OCMPIFACE, - OCMPSTR, OCOMPLIT, OMAPLIT, OSTRUCTLIT, From a0d6420d8be2ae7164797051ec74fa2a2df466a1 Mon Sep 17 00:00:00 2001 From: Matthew Dempsky Date: Thu, 11 Oct 2018 13:00:11 -0700 Subject: [PATCH 100/240] cmd/compile/internal/gc: remove OCMPIFACE/OCMPSTR placeholders Change-Id: If05f6146a1fd97f61fc71629c5c29df43220d0c8 Reviewed-on: https://go-review.googlesource.com/c/141638 Reviewed-by: Brad Fitzpatrick --- src/cmd/compile/internal/gc/op_string.go | 4 ++-- src/cmd/compile/internal/gc/syntax.go | 2 -- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/src/cmd/compile/internal/gc/op_string.go b/src/cmd/compile/internal/gc/op_string.go index 90b95d769f..8358854bf2 100644 --- a/src/cmd/compile/internal/gc/op_string.go +++ b/src/cmd/compile/internal/gc/op_string.go @@ -4,9 +4,9 @@ package gc import "strconv" -const _Op_name = "XXXNAMENONAMETYPEPACKLITERALADDSUBORXORADDSTRADDRANDANDAPPENDARRAYBYTESTRARRAYBYTESTRTMPARRAYRUNESTRSTRARRAYBYTESTRARRAYBYTETMPSTRARRAYRUNEASAS2AS2FUNCAS2RECVAS2MAPRAS2DOTTYPEASOPCALLCALLFUNCCALLMETHCALLINTERCALLPARTCAPCLOSECLOSURECMPIFACECMPSTRCOMPLITMAPLITSTRUCTLITARRAYLITSLICELITPTRLITCONVCONVIFACECONVNOPCOPYDCLDCLFUNCDCLFIELDDCLCONSTDCLTYPEDELETEDOTDOTPTRDOTMETHDOTINTERXDOTDOTTYPEDOTTYPE2EQNELTLEGEGTINDINDEXINDEXMAPKEYSTRUCTKEYLENMAKEMAKECHANMAKEMAPMAKESLICEMULDIVMODLSHRSHANDANDNOTNEWNOTCOMPLUSMINUSORORPANICPRINTPRINTNPARENSENDSLICESLICEARRSLICESTRSLICE3SLICE3ARRRECOVERRECVRUNESTRSELRECVSELRECV2IOTAREALIMAGCOMPLEXALIGNOFOFFSETOFSIZEOFBLOCKBREAKCASEXCASECONTINUEDEFEREMPTYFALLFORFORUNTILGOTOIFLABELPROCRANGERETURNSELECTSWITCHTYPESWTCHANTMAPTSTRUCTTINTERTFUNCTARRAYDDDDDDARGINLCALLEFACEITABIDATASPTRCLOSUREVARCFUNCCHECKNILVARDEFVARKILLVARLIVEINDREGSPRETJMPGETGEND" +const _Op_name = "XXXNAMENONAMETYPEPACKLITERALADDSUBORXORADDSTRADDRANDANDAPPENDARRAYBYTESTRARRAYBYTESTRTMPARRAYRUNESTRSTRARRAYBYTESTRARRAYBYTETMPSTRARRAYRUNEASAS2AS2FUNCAS2RECVAS2MAPRAS2DOTTYPEASOPCALLCALLFUNCCALLMETHCALLINTERCALLPARTCAPCLOSECLOSURECOMPLITMAPLITSTRUCTLITARRAYLITSLICELITPTRLITCONVCONVIFACECONVNOPCOPYDCLDCLFUNCDCLFIELDDCLCONSTDCLTYPEDELETEDOTDOTPTRDOTMETHDOTINTERXDOTDOTTYPEDOTTYPE2EQNELTLEGEGTINDINDEXINDEXMAPKEYSTRUCTKEYLENMAKEMAKECHANMAKEMAPMAKESLICEMULDIVMODLSHRSHANDANDNOTNEWNOTCOMPLUSMINUSORORPANICPRINTPRINTNPARENSENDSLICESLICEARRSLICESTRSLICE3SLICE3ARRRECOVERRECVRUNESTRSELRECVSELRECV2IOTAREALIMAGCOMPLEXALIGNOFOFFSETOFSIZEOFBLOCKBREAKCASEXCASECONTINUEDEFEREMPTYFALLFORFORUNTILGOTOIFLABELPROCRANGERETURNSELECTSWITCHTYPESWTCHANTMAPTSTRUCTTINTERTFUNCTARRAYDDDDDDARGINLCALLEFACEITABIDATASPTRCLOSUREVARCFUNCCHECKNILVARDEFVARKILLVARLIVEINDREGSPRETJMPGETGEND" -var _Op_index = [...]uint16{0, 3, 7, 13, 17, 21, 28, 31, 34, 36, 39, 45, 49, 55, 61, 73, 88, 100, 112, 127, 139, 141, 144, 151, 158, 165, 175, 179, 183, 191, 199, 208, 216, 219, 224, 231, 239, 245, 252, 258, 267, 275, 283, 289, 293, 302, 309, 313, 316, 323, 331, 339, 346, 352, 355, 361, 368, 376, 380, 387, 395, 397, 399, 401, 403, 405, 407, 410, 415, 423, 426, 435, 438, 442, 450, 457, 466, 469, 472, 475, 478, 481, 484, 490, 493, 496, 499, 503, 508, 512, 517, 522, 528, 533, 537, 542, 550, 558, 564, 573, 580, 584, 591, 598, 606, 610, 614, 618, 625, 632, 640, 646, 651, 656, 660, 665, 673, 678, 683, 687, 690, 698, 702, 704, 709, 713, 718, 724, 730, 736, 742, 747, 751, 758, 764, 769, 775, 778, 784, 791, 796, 800, 805, 809, 819, 824, 832, 838, 845, 852, 860, 866, 870, 873} +var _Op_index = [...]uint16{0, 3, 7, 13, 17, 21, 28, 31, 34, 36, 39, 45, 49, 55, 61, 73, 88, 100, 112, 127, 139, 141, 144, 151, 158, 165, 175, 179, 183, 191, 199, 208, 216, 219, 224, 231, 238, 244, 253, 261, 269, 275, 279, 288, 295, 299, 302, 309, 317, 325, 332, 338, 341, 347, 354, 362, 366, 373, 381, 383, 385, 387, 389, 391, 393, 396, 401, 409, 412, 421, 424, 428, 436, 443, 452, 455, 458, 461, 464, 467, 470, 476, 479, 482, 485, 489, 494, 498, 503, 508, 514, 519, 523, 528, 536, 544, 550, 559, 566, 570, 577, 584, 592, 596, 600, 604, 611, 618, 626, 632, 637, 642, 646, 651, 659, 664, 669, 673, 676, 684, 688, 690, 695, 699, 704, 710, 716, 722, 728, 733, 737, 744, 750, 755, 761, 764, 770, 777, 782, 786, 791, 795, 805, 810, 818, 824, 831, 838, 846, 852, 856, 859} func (i Op) String() string { if i >= Op(len(_Op_index)-1) { diff --git a/src/cmd/compile/internal/gc/syntax.go b/src/cmd/compile/internal/gc/syntax.go index 1368d5edb8..3ae3976d96 100644 --- a/src/cmd/compile/internal/gc/syntax.go +++ b/src/cmd/compile/internal/gc/syntax.go @@ -610,8 +610,6 @@ const ( OCAP // cap(Left) OCLOSE // close(Left) OCLOSURE // func Type { Body } (func literal) - _ // toolstash kludge; was OCMPIFACE - _ // toolstash kludge; was OCMPSTR OCOMPLIT // Right{List} (composite literal, not yet lowered to specific form) OMAPLIT // Type{List} (composite literal, Type is map) OSTRUCTLIT // Type{List} (composite literal, Type is struct) From 93cf82f08af78869a721d4e48fc4fd1ce08cd259 Mon Sep 17 00:00:00 2001 From: Elias Naur Date: Fri, 12 Oct 2018 11:36:54 +0200 Subject: [PATCH 101/240] os: make UserHomeDir return "/" on iOS The UserHomeDir test succeeds on the builder, but not when run manually where HOME is set to the host $HOME. Change-Id: I1db0f608b04b311b53cc0c8160a3778caaf542f6 Reviewed-on: https://go-review.googlesource.com/c/141798 Run-TryBot: Elias Naur Reviewed-by: Brad Fitzpatrick --- src/os/file.go | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/src/os/file.go b/src/os/file.go index 61f37f2489..3e626a023a 100644 --- a/src/os/file.go +++ b/src/os/file.go @@ -394,6 +394,11 @@ func UserHomeDir() string { return Getenv("home") case "nacl", "android": return "/" + case "darwin": + if runtime.GOARCH == "arm" || runtime.GOARCH == "arm64" { + return "/" + } + fallthrough default: return Getenv("HOME") } From 1f95e0a9d99c8307b24e8bf542ae0e093ee95838 Mon Sep 17 00:00:00 2001 From: Mihai Todor Date: Fri, 12 Oct 2018 14:35:16 +0000 Subject: [PATCH 102/240] encoding/base64: fix typo in decodeQuantum docs Change-Id: I643540bcea574d8a70b79237d97097dcc7368766 GitHub-Last-Rev: e2be58d1ab84f91dfbba1067aae7145f24fd650d GitHub-Pull-Request: golang/go#28125 Reviewed-on: https://go-review.googlesource.com/c/141119 Reviewed-by: Brad Fitzpatrick --- src/encoding/base64/base64.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/encoding/base64/base64.go b/src/encoding/base64/base64.go index e8afc48859..0bb37b311a 100644 --- a/src/encoding/base64/base64.go +++ b/src/encoding/base64/base64.go @@ -270,7 +270,7 @@ func (e CorruptInputError) Error() string { return "illegal base64 data at input byte " + strconv.FormatInt(int64(e), 10) } -// decodeQuantum decodes up to 4 base64 bytes. It takes for parameters +// decodeQuantum decodes up to 4 base64 bytes. The received parameters are // the destination buffer dst, the source buffer src and an index in the // source buffer si. // It returns the number of bytes read from src, the number of bytes written From e19f5754640b0dd6a315edffcaef23c3cf2cefe6 Mon Sep 17 00:00:00 2001 From: Yuval Pavel Zholkover Date: Wed, 10 Oct 2018 23:32:36 +0300 Subject: [PATCH 103/240] syscall: correctly pad with NUL in FreeBSD convertFromDirents11 We weren't writing a terminating NUL after dstDirent.Namlen bytes of dstDirent.Name. And we weren't filling the possible additional bytes until dstDirent.Reclen. Fixes #28131 Change-Id: Id691c25225795c0dbb0d7004bfca7bb7fc706de9 Reviewed-on: https://go-review.googlesource.com/c/141297 Run-TryBot: Tobias Klauser TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/syscall/dirent_bsd_test.go | 76 ++++++++++++++++++++++++++++++++++ src/syscall/syscall_freebsd.go | 36 ++++++++-------- 2 files changed, 93 insertions(+), 19 deletions(-) create mode 100644 src/syscall/dirent_bsd_test.go diff --git a/src/syscall/dirent_bsd_test.go b/src/syscall/dirent_bsd_test.go new file mode 100644 index 0000000000..e5b8357af7 --- /dev/null +++ b/src/syscall/dirent_bsd_test.go @@ -0,0 +1,76 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build darwin dragonfly freebsd netbsd openbsd + +package syscall_test + +import ( + "bytes" + "io/ioutil" + "os" + "path/filepath" + "sort" + "strconv" + "strings" + "syscall" + "testing" +) + +func TestDirent(t *testing.T) { + const ( + direntBufSize = 2048 + filenameMinSize = 11 + ) + + d, err := ioutil.TempDir("", "dirent-test") + if err != nil { + t.Fatalf("tempdir: %v", err) + } + defer os.RemoveAll(d) + t.Logf("tmpdir: %s", d) + + for i, c := range []byte("0123456789") { + name := string(bytes.Repeat([]byte{c}, filenameMinSize+i)) + err = ioutil.WriteFile(filepath.Join(d, name), nil, 0644) + if err != nil { + t.Fatalf("writefile: %v", err) + } + } + + buf := bytes.Repeat([]byte("DEADBEAF"), direntBufSize/8) + fd, err := syscall.Open(d, syscall.O_RDONLY, 0) + defer syscall.Close(fd) + if err != nil { + t.Fatalf("syscall.open: %v", err) + } + n, err := syscall.ReadDirent(fd, buf) + if err != nil { + t.Fatalf("syscall.readdir: %v", err) + } + buf = buf[:n] + + names := make([]string, 0, 10) + for len(buf) > 0 { + var bc int + bc, _, names = syscall.ParseDirent(buf, -1, names) + buf = buf[bc:] + } + + sort.Strings(names) + t.Logf("names: %q", names) + + if len(names) != 10 { + t.Errorf("got %d names; expected 10", len(names)) + } + for i, name := range names { + ord, err := strconv.Atoi(name[:1]) + if err != nil { + t.Fatalf("names[%d] is non-integer %q: %v", i, names[i], err) + } + if expected := string(strings.Repeat(name[:1], filenameMinSize+ord)); name != expected { + t.Errorf("names[%d] is %q (len %d); expected %q (len %d)", i, name, len(name), expected, len(expected)) + } + } +} diff --git a/src/syscall/syscall_freebsd.go b/src/syscall/syscall_freebsd.go index e118120048..9ae024131d 100644 --- a/src/syscall/syscall_freebsd.go +++ b/src/syscall/syscall_freebsd.go @@ -344,18 +344,17 @@ func (s *Statfs_t) convertFrom(old *statfs_freebsd11_t) { copy(s.Mntonname[:], old.Mntonname[:n]) } -func convertFromDirents11(oldBuf []byte, buf []byte) int { - src := unsafe.Pointer(&oldBuf[0]) - esrc := unsafe.Pointer(uintptr(src) + uintptr(len(oldBuf))) - dst := unsafe.Pointer(&buf[0]) - edst := unsafe.Pointer(uintptr(dst) + uintptr(len(buf))) +func convertFromDirents11(old []byte, buf []byte) int { + oldFixedSize := int(unsafe.Offsetof((*dirent_freebsd11)(nil).Name)) + fixedSize := int(unsafe.Offsetof((*Dirent)(nil).Name)) + srcPos := 0 + dstPos := 0 + for dstPos+fixedSize < len(buf) && srcPos+oldFixedSize < len(old) { + srcDirent := (*dirent_freebsd11)(unsafe.Pointer(&old[srcPos])) + dstDirent := (*Dirent)(unsafe.Pointer(&buf[dstPos])) - for uintptr(src) < uintptr(esrc) && uintptr(dst) < uintptr(edst) { - srcDirent := (*dirent_freebsd11)(src) - dstDirent := (*Dirent)(dst) - - reclen := roundup(int(unsafe.Offsetof(dstDirent.Name)+uintptr(srcDirent.Namlen)+1), 8) - if uintptr(dst)+uintptr(reclen) >= uintptr(edst) { + reclen := roundup(fixedSize+int(srcDirent.Namlen)+1, 8) + if dstPos+reclen >= len(buf) { break } @@ -367,18 +366,17 @@ func convertFromDirents11(oldBuf []byte, buf []byte) int { dstDirent.Namlen = uint16(srcDirent.Namlen) dstDirent.Pad1 = 0 - sl := srcDirent.Name[:] - n := clen(*(*[]byte)(unsafe.Pointer(&sl))) - copy(dstDirent.Name[:], srcDirent.Name[:n]) - for i := n; i < int(dstDirent.Namlen); i++ { - dstDirent.Name[i] = 0 + copy(dstDirent.Name[:], srcDirent.Name[:srcDirent.Namlen]) + padding := buf[dstPos+fixedSize+int(dstDirent.Namlen) : dstPos+reclen] + for i := range padding { + padding[i] = 0 } - src = unsafe.Pointer(uintptr(src) + uintptr(srcDirent.Reclen)) - dst = unsafe.Pointer(uintptr(dst) + uintptr(reclen)) + dstPos += int(dstDirent.Reclen) + srcPos += int(srcDirent.Reclen) } - return int(uintptr(dst) - uintptr(unsafe.Pointer((&buf[0])))) + return dstPos } /* From da6c168378b4c1deb2a731356f1f438e4723b8a7 Mon Sep 17 00:00:00 2001 From: Brad Fitzpatrick Date: Tue, 10 Jul 2018 21:39:50 +0000 Subject: [PATCH 104/240] net/http: flesh out Transport's HTTP/1 CONNECT+bidi support to match HTTP/2 Fixes #17227 Change-Id: I0f8964593d69623b85d5759f6276063ee62b2915 Reviewed-on: https://go-review.googlesource.com/c/123156 Reviewed-by: Brad Fitzpatrick --- src/net/http/request.go | 3 ++ src/net/http/requestwrite_test.go | 32 +++++++++++++++ src/net/http/transfer.go | 24 +++++++++++- src/net/http/transport.go | 9 ----- src/net/http/transport_test.go | 65 +++++++++++++++++++++++++++++++ 5 files changed, 123 insertions(+), 10 deletions(-) diff --git a/src/net/http/request.go b/src/net/http/request.go index 967de7917f..3669f17f66 100644 --- a/src/net/http/request.go +++ b/src/net/http/request.go @@ -545,6 +545,9 @@ func (r *Request) write(w io.Writer, usingProxy bool, extraHeaders Header, waitF } else if r.Method == "CONNECT" && r.URL.Path == "" { // CONNECT requests normally give just the host and port, not a full URL. ruri = host + if r.URL.Opaque != "" { + ruri = r.URL.Opaque + } } // TODO(bradfitz): escape at least newlines in ruri? diff --git a/src/net/http/requestwrite_test.go b/src/net/http/requestwrite_test.go index eb65b9f736..246fb4e65d 100644 --- a/src/net/http/requestwrite_test.go +++ b/src/net/http/requestwrite_test.go @@ -512,6 +512,38 @@ var reqWriteTests = []reqWriteTest{ "User-Agent: Go-http-client/1.1\r\n" + "\r\n", }, + + // CONNECT without Opaque + 21: { + Req: Request{ + Method: "CONNECT", + URL: &url.URL{ + Scheme: "https", // of proxy.com + Host: "proxy.com", + }, + }, + // What we used to do, locking that behavior in: + WantWrite: "CONNECT proxy.com HTTP/1.1\r\n" + + "Host: proxy.com\r\n" + + "User-Agent: Go-http-client/1.1\r\n" + + "\r\n", + }, + + // CONNECT with Opaque + 22: { + Req: Request{ + Method: "CONNECT", + URL: &url.URL{ + Scheme: "https", // of proxy.com + Host: "proxy.com", + Opaque: "backend:443", + }, + }, + WantWrite: "CONNECT backend:443 HTTP/1.1\r\n" + + "Host: proxy.com\r\n" + + "User-Agent: Go-http-client/1.1\r\n" + + "\r\n", + }, } func TestRequestWrite(t *testing.T) { diff --git a/src/net/http/transfer.go b/src/net/http/transfer.go index a41d034204..f0b43844dd 100644 --- a/src/net/http/transfer.go +++ b/src/net/http/transfer.go @@ -184,6 +184,9 @@ func (t *transferWriter) shouldSendChunkedRequestBody() bool { if t.ContentLength >= 0 || t.Body == nil { // redundant checks; caller did them return false } + if t.Method == "CONNECT" { + return false + } if requestMethodUsuallyLacksBody(t.Method) { // Only probe the Request.Body for GET/HEAD/DELETE/etc // requests, because it's only those types of requests @@ -357,7 +360,11 @@ func (t *transferWriter) writeBody(w io.Writer) error { err = cw.Close() } } else if t.ContentLength == -1 { - ncopy, err = io.Copy(w, body) + dst := w + if t.Method == "CONNECT" { + dst = bufioFlushWriter{dst} + } + ncopy, err = io.Copy(dst, body) } else { ncopy, err = io.Copy(w, io.LimitReader(body, t.ContentLength)) if err != nil { @@ -1050,3 +1057,18 @@ func isKnownInMemoryReader(r io.Reader) bool { } return false } + +// bufioFlushWriter is an io.Writer wrapper that flushes all writes +// on its wrapped writer if it's a *bufio.Writer. +type bufioFlushWriter struct{ w io.Writer } + +func (fw bufioFlushWriter) Write(p []byte) (n int, err error) { + n, err = fw.w.Write(p) + if bw, ok := fw.w.(*bufio.Writer); n > 0 && ok { + ferr := bw.Flush() + if ferr != nil && err == nil { + err = ferr + } + } + return +} diff --git a/src/net/http/transport.go b/src/net/http/transport.go index b298ec6d7d..c459092cb8 100644 --- a/src/net/http/transport.go +++ b/src/net/http/transport.go @@ -85,15 +85,6 @@ func init() { // To explicitly enable HTTP/2 on a transport, use golang.org/x/net/http2 // and call ConfigureTransport. See the package docs for more about HTTP/2. // -// The Transport will send CONNECT requests to a proxy for its own use -// when processing HTTPS requests, but Transport should generally not -// be used to send a CONNECT request. That is, the Request passed to -// the RoundTrip method should not have a Method of "CONNECT", as Go's -// HTTP/1.x implementation does not support full-duplex request bodies -// being written while the response body is streamed. Go's HTTP/2 -// implementation does support full duplex, but many CONNECT proxies speak -// HTTP/1.x. -// // Responses with status codes in the 1xx range are either handled // automatically (100 expect-continue) or ignored. The one // exception is HTTP status code 101 (Switching Protocols), which is diff --git a/src/net/http/transport_test.go b/src/net/http/transport_test.go index 8c31238c11..211f8cb467 100644 --- a/src/net/http/transport_test.go +++ b/src/net/http/transport_test.go @@ -4887,3 +4887,68 @@ func TestTransportResponseBodyWritableOnProtocolSwitch(t *testing.T) { t.Errorf("read %q; want %q", got, want) } } + +func TestTransportCONNECTBidi(t *testing.T) { + defer afterTest(t) + const target = "backend:443" + cst := newClientServerTest(t, h1Mode, HandlerFunc(func(w ResponseWriter, r *Request) { + if r.Method != "CONNECT" { + t.Errorf("unexpected method %q", r.Method) + w.WriteHeader(500) + return + } + if r.RequestURI != target { + t.Errorf("unexpected CONNECT target %q", r.RequestURI) + w.WriteHeader(500) + return + } + nc, brw, err := w.(Hijacker).Hijack() + if err != nil { + t.Error(err) + return + } + defer nc.Close() + nc.Write([]byte("HTTP/1.1 200 OK\r\n\r\n")) + // Switch to a little protocol that capitalize its input lines: + for { + line, err := brw.ReadString('\n') + if err != nil { + if err != io.EOF { + t.Error(err) + } + return + } + io.WriteString(brw, strings.ToUpper(line)) + brw.Flush() + } + })) + defer cst.close() + pr, pw := io.Pipe() + defer pw.Close() + req, err := NewRequest("CONNECT", cst.ts.URL, pr) + if err != nil { + t.Fatal(err) + } + req.URL.Opaque = target + res, err := cst.c.Do(req) + if err != nil { + t.Fatal(err) + } + defer res.Body.Close() + if res.StatusCode != 200 { + t.Fatalf("status code = %d; want 200", res.StatusCode) + } + br := bufio.NewReader(res.Body) + for _, str := range []string{"foo", "bar", "baz"} { + fmt.Fprintf(pw, "%s\n", str) + got, err := br.ReadString('\n') + if err != nil { + t.Fatal(err) + } + got = strings.TrimSpace(got) + want := strings.ToUpper(str) + if got != want { + t.Fatalf("got %q; want %q", got, want) + } + } +} From a5248acd91dcf0e90a68c1ff88ca389dc034557c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Fri, 12 Oct 2018 16:48:38 +0200 Subject: [PATCH 105/240] internal/cpu: enable support for GODEBUGCPU in non-experimental builds MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Enabling GODEBUGCPU without the need to set GOEXPERIMENT=debugcpu enables trybots and builders to run tests for GODEBUGCPU features in upcoming CLs that will implement the new syntax and features for non-experimental GODEBUGCPU support from proposal golang.org/issue/27218. Updates #27218 Change-Id: Icc69e51e736711a86b02b46bd441ffc28423beba Reviewed-on: https://go-review.googlesource.com/c/141817 Run-TryBot: Martin Möhrmann TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/cmd/internal/objabi/util.go | 2 -- src/internal/cpu/cpu.go | 6 ++---- src/internal/cpu/cpu_test.go | 8 ++++---- src/internal/cpu/cpu_x86_test.go | 2 +- src/runtime/proc.go | 4 ++-- 5 files changed, 9 insertions(+), 13 deletions(-) diff --git a/src/cmd/internal/objabi/util.go b/src/cmd/internal/objabi/util.go index ffd1c04d39..d1017322f0 100644 --- a/src/cmd/internal/objabi/util.go +++ b/src/cmd/internal/objabi/util.go @@ -105,7 +105,6 @@ var ( Fieldtrack_enabled int Preemptibleloops_enabled int Clobberdead_enabled int - DebugCPU_enabled int ) // Toolchain experiments. @@ -120,7 +119,6 @@ var exper = []struct { {"framepointer", &framepointer_enabled}, {"preemptibleloops", &Preemptibleloops_enabled}, {"clobberdead", &Clobberdead_enabled}, - {"debugcpu", &DebugCPU_enabled}, } var defaultExpstring = Expstring() diff --git a/src/internal/cpu/cpu.go b/src/internal/cpu/cpu.go index bfb016c7f7..54b100b1d4 100644 --- a/src/internal/cpu/cpu.go +++ b/src/internal/cpu/cpu.go @@ -6,8 +6,7 @@ // used by the Go standard library. package cpu -// DebugOptions is set to true by the runtime if go was compiled with GOEXPERIMENT=debugcpu -// and GOOS is Linux or Darwin. +// DebugOptions is set to true by the runtime if the OS supports GODEBUGCPU. // This should not be changed after it is initialized. var DebugOptions bool @@ -139,8 +138,7 @@ type s390x struct { // Initialize examines the processor and sets the relevant variables above. // This is called by the runtime package early in program initialization, -// before normal init functions are run. env is set by runtime on Linux and Darwin -// if go was compiled with GOEXPERIMENT=debugcpu. +// before normal init functions are run. env is set by runtime if the OS supports GODEBUGCPU. func Initialize(env string) { doinit() processOptions(env) diff --git a/src/internal/cpu/cpu_test.go b/src/internal/cpu/cpu_test.go index d4115a1b87..04ab9eeecb 100644 --- a/src/internal/cpu/cpu_test.go +++ b/src/internal/cpu/cpu_test.go @@ -13,14 +13,14 @@ import ( "testing" ) -func MustHaveDebugOptionsEnabled(t *testing.T) { +func MustHaveDebugOptionsSupport(t *testing.T) { if !DebugOptions { - t.Skipf("skipping test: cpu feature options not enabled") + t.Skipf("skipping test: cpu feature options not supported by OS") } } func runDebugOptionsTest(t *testing.T, test string, options string) { - MustHaveDebugOptionsEnabled(t) + MustHaveDebugOptionsSupport(t) testenv.MustHaveExec(t) @@ -42,7 +42,7 @@ func TestDisableAllCapabilities(t *testing.T) { } func TestAllCapabilitiesDisabled(t *testing.T) { - MustHaveDebugOptionsEnabled(t) + MustHaveDebugOptionsSupport(t) if os.Getenv("GODEBUGCPU") != "all=0" { t.Skipf("skipping test: GODEBUGCPU=all=0 not set") diff --git a/src/internal/cpu/cpu_x86_test.go b/src/internal/cpu/cpu_x86_test.go index d03306c907..c3ea7cb590 100644 --- a/src/internal/cpu/cpu_x86_test.go +++ b/src/internal/cpu/cpu_x86_test.go @@ -34,7 +34,7 @@ func TestDisableSSE2(t *testing.T) { } func TestSSE2DebugOption(t *testing.T) { - MustHaveDebugOptionsEnabled(t) + MustHaveDebugOptionsSupport(t) if os.Getenv("GODEBUGCPU") != "sse2=0" { t.Skipf("skipping test: GODEBUGCPU=sse2=0 not set") diff --git a/src/runtime/proc.go b/src/runtime/proc.go index f536b82aab..86c14997b1 100644 --- a/src/runtime/proc.go +++ b/src/runtime/proc.go @@ -478,12 +478,12 @@ const ( ) // cpuinit extracts the environment variable GODEBUGCPU from the environment on -// Linux and Darwin if the GOEXPERIMENT debugcpu was set and calls internal/cpu.Initialize. +// Linux and Darwin and calls internal/cpu.Initialize. func cpuinit() { const prefix = "GODEBUGCPU=" var env string - if haveexperiment("debugcpu") && (GOOS == "linux" || GOOS == "darwin") { + if GOOS == "linux" || GOOS == "darwin" { cpu.DebugOptions = true // Similar to goenv_unix but extracts the environment value for From d82e51a11973714708ddc7f9f055ae8ea3d509f1 Mon Sep 17 00:00:00 2001 From: Tobias Klauser Date: Fri, 12 Oct 2018 10:54:06 +0200 Subject: [PATCH 106/240] internal/poll: add FD.Fsync on aix Follow-up for CL 138717. This fixes the build of the os package on aix. Change-Id: I879b9360e71837ab622ae3a7b6144782cf5a9ce7 Reviewed-on: https://go-review.googlesource.com/c/141797 Run-TryBot: Tobias Klauser TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/internal/poll/fd_fsync_posix.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/internal/poll/fd_fsync_posix.go b/src/internal/poll/fd_fsync_posix.go index 943f59a9ab..30dde0720b 100644 --- a/src/internal/poll/fd_fsync_posix.go +++ b/src/internal/poll/fd_fsync_posix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows +// +build aix dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris windows package poll From 4fb8b1de3cf629c94910c5389220a07963bd44e2 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Fri, 12 Oct 2018 18:01:50 +0200 Subject: [PATCH 107/240] internal/cpu: use 'off' for disabling cpu capabilities instead of '0' MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Updates #27218 Change-Id: I4ce20376fd601b5f958d79014af7eaf89e9de613 Reviewed-on: https://go-review.googlesource.com/c/141818 Run-TryBot: Martin Möhrmann TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/internal/cpu/cpu.go | 10 +++++----- src/internal/cpu/cpu_test.go | 6 +++--- src/internal/cpu/cpu_x86_test.go | 6 +++--- 3 files changed, 11 insertions(+), 11 deletions(-) diff --git a/src/internal/cpu/cpu.go b/src/internal/cpu/cpu.go index 54b100b1d4..fdda880af4 100644 --- a/src/internal/cpu/cpu.go +++ b/src/internal/cpu/cpu.go @@ -157,11 +157,11 @@ type option struct { } // processOptions disables CPU feature values based on the parsed env string. -// The env string is expected to be of the form feature1=0,feature2=0... +// The env string is expected to be of the form feature1=off,feature2=off... // where feature names is one of the architecture specifc list stored in the -// cpu packages options variable. If env contains all=0 then all capabilities +// cpu packages options variable. If env contains all=off then all capabilities // referenced through the options variable are disabled. Other feature -// names and values other than 0 are silently ignored. +// names and values other than 'off' are silently ignored. func processOptions(env string) { field: for env != "" { @@ -178,8 +178,8 @@ field: } key, value := field[:i], field[i+1:] - // Only allow turning off CPU features by specifying '0'. - if value == "0" { + // Only allow turning off CPU features by specifying 'off'. + if value == "off" { if key == "all" { for _, v := range options { *v.Feature = false diff --git a/src/internal/cpu/cpu_test.go b/src/internal/cpu/cpu_test.go index 04ab9eeecb..6e7375fa7c 100644 --- a/src/internal/cpu/cpu_test.go +++ b/src/internal/cpu/cpu_test.go @@ -38,14 +38,14 @@ func runDebugOptionsTest(t *testing.T, test string, options string) { } func TestDisableAllCapabilities(t *testing.T) { - runDebugOptionsTest(t, "TestAllCapabilitiesDisabled", "all=0") + runDebugOptionsTest(t, "TestAllCapabilitiesDisabled", "all=off") } func TestAllCapabilitiesDisabled(t *testing.T) { MustHaveDebugOptionsSupport(t) - if os.Getenv("GODEBUGCPU") != "all=0" { - t.Skipf("skipping test: GODEBUGCPU=all=0 not set") + if os.Getenv("GODEBUGCPU") != "all=off" { + t.Skipf("skipping test: GODEBUGCPU=all=off not set") } for _, o := range Options { diff --git a/src/internal/cpu/cpu_x86_test.go b/src/internal/cpu/cpu_x86_test.go index c3ea7cb590..59c51770c5 100644 --- a/src/internal/cpu/cpu_x86_test.go +++ b/src/internal/cpu/cpu_x86_test.go @@ -30,14 +30,14 @@ func TestX86ifAVX2hasAVX(t *testing.T) { } func TestDisableSSE2(t *testing.T) { - runDebugOptionsTest(t, "TestSSE2DebugOption", "sse2=0") + runDebugOptionsTest(t, "TestSSE2DebugOption", "sse2=off") } func TestSSE2DebugOption(t *testing.T) { MustHaveDebugOptionsSupport(t) - if os.Getenv("GODEBUGCPU") != "sse2=0" { - t.Skipf("skipping test: GODEBUGCPU=sse2=0 not set") + if os.Getenv("GODEBUGCPU") != "sse2=off" { + t.Skipf("skipping test: GODEBUGCPU=sse2=off not set") } want := runtime.GOARCH != "386" // SSE2 can only be disabled on 386. From 56131cbd1d61ec446e10dfe72a96f329ed3d952a Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Thu, 11 Oct 2018 16:47:41 -0700 Subject: [PATCH 108/240] go/types: remove a test case and update comment The original need for the extra test case and issue was eliminated by https://golang.org/cl/116815 which introduced systematic cycle detection. Now that we correctly report the cycle, we can't say much about the invalid cast anyway (the type is invalid due to the cycle). A more sophisticated approach would be able to tell the size of a function type independent of the details of that type, but the type-checker is not set up for this kind of lazy type-checking. Fixes #23127. Change-Id: Ia8479e66baf630ce96f6f36770c8e1c810c59ddc Reviewed-on: https://go-review.googlesource.com/c/141640 Run-TryBot: Robert Griesemer TryBot-Result: Gobot Gobot Reviewed-by: Alan Donovan --- src/go/types/testdata/cycles2.src | 14 +------------- 1 file changed, 1 insertion(+), 13 deletions(-) diff --git a/src/go/types/testdata/cycles2.src b/src/go/types/testdata/cycles2.src index a7f4bc60f5..fd0df4bf27 100644 --- a/src/go/types/testdata/cycles2.src +++ b/src/go/types/testdata/cycles2.src @@ -88,22 +88,10 @@ type T3 /* ERROR cycle */ interface { var x3 T3 type T4 /* ERROR cycle */ interface { - m() [unsafe.Sizeof(cast4(x4.m))]int + m() [unsafe.Sizeof(cast4(x4.m))]int // cast is invalid but we have a cycle, so all bets are off } var x4 T4 var _ = cast4(x4.m) type cast4 func() - -// This test is symmetric to the T4 case: Here the cast is -// "correct", but it doesn't work inside the T5 interface. - -type T5 /* ERROR cycle */ interface { - m() [unsafe.Sizeof(cast5(x5.m))]int -} - -var x5 T5 -var _ = cast5(x5.m) - -type cast5 func() [0]int From 8e0aea162b5ed27b444a2a54aa16152022483141 Mon Sep 17 00:00:00 2001 From: Russ Cox Date: Tue, 2 Oct 2018 20:45:45 -0400 Subject: [PATCH 109/240] testing: implement -benchtime=100x When running benchmarks with profilers and trying to compare one run against another, it is very useful to be able to force each run to execute exactly the same number of iterations. Discussion on the proposal issue #24735 led to the decision to overload -benchtime, so that instead of saying -benchtime 10s to run a benchmark for 10 seconds, you say -benchtime 100x to run a benchmark 100 times. Fixes #24735. Change-Id: Id17c5bd18bd09987bb48ed12420d61ae9e200fd7 Reviewed-on: https://go-review.googlesource.com/c/139258 Run-TryBot: Russ Cox Reviewed-by: Austin Clements Reviewed-by: Brad Fitzpatrick --- src/cmd/go/alldocs.go | 2 + src/cmd/go/internal/test/test.go | 2 + src/testing/benchmark.go | 75 ++++++++++++++++++++++++-------- src/testing/sub_test.go | 4 +- 4 files changed, 63 insertions(+), 20 deletions(-) diff --git a/src/cmd/go/alldocs.go b/src/cmd/go/alldocs.go index f54f000b07..33cb6cd3b3 100644 --- a/src/cmd/go/alldocs.go +++ b/src/cmd/go/alldocs.go @@ -2659,6 +2659,8 @@ // Run enough iterations of each benchmark to take t, specified // as a time.Duration (for example, -benchtime 1h30s). // The default is 1 second (1s). +// The special syntax Nx means to run the benchmark N times +// (for example, -benchtime 100x). // // -count n // Run each test and benchmark n times (default 1). diff --git a/src/cmd/go/internal/test/test.go b/src/cmd/go/internal/test/test.go index 3295e8ffe2..70deea3643 100644 --- a/src/cmd/go/internal/test/test.go +++ b/src/cmd/go/internal/test/test.go @@ -212,6 +212,8 @@ const testFlag2 = ` Run enough iterations of each benchmark to take t, specified as a time.Duration (for example, -benchtime 1h30s). The default is 1 second (1s). + The special syntax Nx means to run the benchmark N times + (for example, -benchtime 100x). -count n Run each test and benchmark n times (default 1). diff --git a/src/testing/benchmark.go b/src/testing/benchmark.go index 9c7b1be79e..90f86dc373 100644 --- a/src/testing/benchmark.go +++ b/src/testing/benchmark.go @@ -10,15 +10,50 @@ import ( "internal/race" "os" "runtime" + "strconv" + "strings" "sync" "sync/atomic" "time" ) var matchBenchmarks = flag.String("test.bench", "", "run only benchmarks matching `regexp`") -var benchTime = flag.Duration("test.benchtime", 1*time.Second, "run each benchmark for duration `d`") +var benchTime = benchTimeFlag{d: 1 * time.Second} var benchmarkMemory = flag.Bool("test.benchmem", false, "print memory allocations for benchmarks") +func init() { + flag.Var(&benchTime, "test.benchtime", "run each benchmark for duration `d`") +} + +type benchTimeFlag struct { + d time.Duration + n int +} + +func (f *benchTimeFlag) String() string { + if f.n > 0 { + return fmt.Sprintf("%dx", f.n) + } + return time.Duration(f.d).String() +} + +func (f *benchTimeFlag) Set(s string) error { + if strings.HasSuffix(s, "x") { + n, err := strconv.ParseInt(s[:len(s)-1], 10, 0) + if err != nil || n <= 0 { + return fmt.Errorf("invalid count") + } + *f = benchTimeFlag{n: int(n)} + return nil + } + d, err := time.ParseDuration(s) + if err != nil || d <= 0 { + return fmt.Errorf("invalid duration") + } + *f = benchTimeFlag{d: d} + return nil +} + // Global lock to ensure only one benchmark runs at a time. var benchmarkLock sync.Mutex @@ -53,7 +88,7 @@ type B struct { previousN int // number of iterations in the previous run previousDuration time.Duration // total duration of the previous run benchFunc func(b *B) - benchTime time.Duration + benchTime benchTimeFlag bytes int64 missingBytes bool // one of the subbenchmarks does not have bytes set. timerOn bool @@ -273,21 +308,25 @@ func (b *B) launch() { }() // Run the benchmark for at least the specified amount of time. - d := b.benchTime - for n := 1; !b.failed && b.duration < d && n < 1e9; { - last := n - // Predict required iterations. - n = int(d.Nanoseconds()) - if nsop := b.nsPerOp(); nsop != 0 { - n /= int(nsop) + if b.benchTime.n > 0 { + b.runN(b.benchTime.n) + } else { + d := b.benchTime.d + for n := 1; !b.failed && b.duration < d && n < 1e9; { + last := n + // Predict required iterations. + n = int(d.Nanoseconds()) + if nsop := b.nsPerOp(); nsop != 0 { + n /= int(nsop) + } + // Run more iterations than we think we'll need (1.2x). + // Don't grow too fast in case we had timing errors previously. + // Be sure to run at least one more than last time. + n = max(min(n+n/5, 100*last), last+1) + // Round up to something easy to read. + n = roundUp(n) + b.runN(n) } - // Run more iterations than we think we'll need (1.2x). - // Don't grow too fast in case we had timing errors previously. - // Be sure to run at least one more than last time. - n = max(min(n+n/5, 100*last), last+1) - // Round up to something easy to read. - n = roundUp(n) - b.runN(n) } b.result = BenchmarkResult{b.N, b.duration, b.bytes, b.netAllocs, b.netBytes} } @@ -416,7 +455,7 @@ func runBenchmarks(importPath string, matchString func(pat, str string) (bool, e b.Run(Benchmark.Name, Benchmark.F) } }, - benchTime: *benchTime, + benchTime: benchTime, context: ctx, } main.runN(1) @@ -653,7 +692,7 @@ func Benchmark(f func(b *B)) BenchmarkResult { w: discard{}, }, benchFunc: f, - benchTime: *benchTime, + benchTime: benchTime, } if b.run1() { b.run() diff --git a/src/testing/sub_test.go b/src/testing/sub_test.go index e9b2233520..8c989714a1 100644 --- a/src/testing/sub_test.go +++ b/src/testing/sub_test.go @@ -17,7 +17,7 @@ import ( func init() { // Make benchmark tests run 10* faster. - *benchTime = 100 * time.Millisecond + benchTime.d = 100 * time.Millisecond } func TestTestContext(t *T) { @@ -593,7 +593,7 @@ func TestBRun(t *T) { chatty: tc.chatty, }, benchFunc: func(b *B) { ok = b.Run("test", tc.f) }, // Use Run to catch failure. - benchTime: time.Microsecond, + benchTime: benchTimeFlag{d: 1 * time.Microsecond}, } root.runN(1) if ok != !tc.failed { From 2d4346b319e01b649f49775c26ab2ff1d28fb7b6 Mon Sep 17 00:00:00 2001 From: Russ Cox Date: Fri, 28 Sep 2018 16:37:16 -0400 Subject: [PATCH 110/240] regexp: split bit-state execution out of machine struct MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This allows the bit-state executions to have their own pool of allocated structures. A step toward eliminating the per-Regexp machine cache. Note especially the -92% on MatchParallelShared. This is real but not a complete story: the other execution engines still need to be de-shared, but the benchmark was only using bit-state. The tiny slowdowns in unrelated code are noise. name old time/op new time/op delta Find-12 264ns ± 3% 254ns ± 0% -3.86% (p=0.000 n=10+9) FindAllNoMatches-12 140ns ± 2% 135ns ± 0% -3.91% (p=0.000 n=10+9) FindString-12 256ns ± 0% 247ns ± 0% -3.52% (p=0.000 n=8+8) FindSubmatch-12 339ns ± 1% 334ns ± 0% -1.41% (p=0.000 n=9+10) FindStringSubmatch-12 322ns ± 0% 321ns ± 0% -0.21% (p=0.005 n=8+9) Literal-12 100ns ± 2% 92ns ± 0% -8.10% (p=0.000 n=10+9) NotLiteral-12 1.50µs ± 0% 1.47µs ± 0% -1.91% (p=0.000 n=8+9) MatchClass-12 2.18µs ± 0% 2.17µs ± 0% -0.20% (p=0.001 n=10+7) MatchClass_InRange-12 2.12µs ± 0% 2.13µs ± 0% +0.23% (p=0.000 n=10+10) ReplaceAll-12 1.41µs ± 0% 1.39µs ± 0% -1.30% (p=0.000 n=7+10) AnchoredLiteralShortNonMatch-12 89.8ns ± 0% 83.2ns ± 0% -7.35% (p=0.000 n=8+8) AnchoredLiteralLongNonMatch-12 105ns ± 3% 105ns ± 0% ~ (p=0.186 n=10+10) AnchoredShortMatch-12 141ns ± 0% 131ns ± 0% -7.09% (p=0.000 n=9+10) AnchoredLongMatch-12 276ns ± 4% 267ns ± 0% -3.23% (p=0.000 n=10+10) OnePassShortA-12 620ns ± 0% 611ns ± 0% -1.39% (p=0.000 n=10+9) NotOnePassShortA-12 575ns ± 3% 552ns ± 0% -3.97% (p=0.000 n=10+8) OnePassShortB-12 493ns ± 0% 491ns ± 0% -0.33% (p=0.000 n=8+8) NotOnePassShortB-12 423ns ± 0% 412ns ± 0% -2.60% (p=0.000 n=8+9) OnePassLongPrefix-12 112ns ± 0% 112ns ± 0% ~ (all equal) OnePassLongNotPrefix-12 405ns ± 0% 410ns ± 0% +1.23% (p=0.000 n=8+9) MatchParallelShared-12 501ns ± 1% 39ns ± 1% -92.27% (p=0.000 n=10+10) MatchParallelCopied-12 39.1ns ± 0% 39.2ns ± 3% ~ (p=0.785 n=6+10) QuoteMetaAll-12 94.6ns ± 0% 94.6ns ± 0% ~ (p=0.439 n=10+8) QuoteMetaNone-12 52.7ns ± 0% 52.7ns ± 0% ~ (all equal) Match/Easy0/32-12 79.1ns ± 0% 72.9ns ± 0% -7.85% (p=0.000 n=9+9) Match/Easy0/1K-12 307ns ± 1% 298ns ± 0% -2.99% (p=0.000 n=10+6) Match/Easy0/32K-12 4.65µs ± 2% 4.60µs ± 2% ~ (p=0.159 n=10+10) Match/Easy0/1M-12 234µs ± 0% 235µs ± 0% +0.17% (p=0.003 n=10+10) Match/Easy0/32M-12 7.98ms ± 1% 7.96ms ± 0% ~ (p=0.278 n=9+10) Match/Easy0i/32-12 1.13µs ± 1% 1.09µs ± 0% -3.24% (p=0.000 n=9+8) Match/Easy0i/1K-12 32.5µs ± 0% 31.7µs ± 0% -2.66% (p=0.000 n=9+9) Match/Easy0i/32K-12 1.59ms ± 0% 1.61ms ± 0% +0.75% (p=0.000 n=9+9) Match/Easy0i/1M-12 51.0ms ± 0% 51.4ms ± 0% +0.77% (p=0.000 n=10+8) Match/Easy0i/32M-12 1.63s ± 0% 1.65s ± 1% +1.24% (p=0.000 n=7+9) Match/Easy1/32-12 75.1ns ± 1% 67.9ns ± 0% -9.54% (p=0.000 n=8+8) Match/Easy1/1K-12 861ns ± 0% 884ns ± 0% +2.71% (p=0.000 n=8+9) Match/Easy1/32K-12 39.2µs ± 1% 39.2µs ± 0% ~ (p=0.090 n=10+9) Match/Easy1/1M-12 1.38ms ± 0% 1.39ms ± 0% ~ (p=0.095 n=10+9) Match/Easy1/32M-12 44.2ms ± 1% 44.2ms ± 1% ~ (p=0.218 n=10+10) Match/Medium/32-12 1.04µs ± 1% 1.05µs ± 0% +1.05% (p=0.000 n=9+8) Match/Medium/1K-12 31.3µs ± 0% 31.3µs ± 0% -0.14% (p=0.004 n=9+9) Match/Medium/32K-12 1.44ms ± 0% 1.45ms ± 0% +0.18% (p=0.001 n=8+8) Match/Medium/1M-12 46.1ms ± 0% 46.2ms ± 0% +0.13% (p=0.003 n=6+9) Match/Medium/32M-12 1.48s ± 0% 1.48s ± 0% +0.20% (p=0.002 n=9+8) Match/Hard/32-12 1.54µs ± 1% 1.49µs ± 0% -3.60% (p=0.000 n=9+10) Match/Hard/1K-12 46.4µs ± 1% 45.1µs ± 1% -2.78% (p=0.000 n=9+10) Match/Hard/32K-12 2.19ms ± 0% 2.18ms ± 1% -0.51% (p=0.006 n=8+9) Match/Hard/1M-12 70.1ms ± 0% 69.7ms ± 1% -0.52% (p=0.006 n=8+9) Match/Hard/32M-12 2.24s ± 0% 2.23s ± 1% -0.42% (p=0.046 n=8+9) Match/Hard1/32-12 8.17µs ± 1% 7.89µs ± 0% -3.42% (p=0.000 n=8+9) Match/Hard1/1K-12 254µs ± 2% 244µs ± 0% -3.91% (p=0.000 n=9+9) Match/Hard1/32K-12 9.58ms ± 1% 10.35ms ± 0% +8.00% (p=0.000 n=10+10) Match/Hard1/1M-12 306ms ± 1% 331ms ± 0% +8.27% (p=0.000 n=9+8) Match/Hard1/32M-12 9.79s ± 1% 10.60s ± 0% +8.29% (p=0.000 n=9+8) Match_onepass_regex/32-12 808ns ± 0% 812ns ± 0% +0.47% (p=0.000 n=8+10) Match_onepass_regex/1K-12 27.8µs ± 0% 28.5µs ± 0% +2.32% (p=0.000 n=8+10) Match_onepass_regex/32K-12 925µs ± 0% 936µs ± 0% +1.24% (p=0.000 n=9+10) Match_onepass_regex/1M-12 29.5ms ± 0% 30.2ms ± 0% +2.38% (p=0.000 n=10+10) Match_onepass_regex/32M-12 945ms ± 0% 970ms ± 0% +2.60% (p=0.000 n=9+10) CompileOnepass-12 4.67µs ± 0% 4.63µs ± 1% -0.84% (p=0.000 n=10+10) [Geo mean] 24.5µs 23.3µs -5.04% https://perf.golang.org/search?q=upload:20181004.1 Change-Id: Idbc2b76223718265657819ff38be2d9aba1c54b4 Reviewed-on: https://go-review.googlesource.com/c/139779 Run-TryBot: Russ Cox Reviewed-by: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- src/regexp/backtrack.go | 176 ++++++++++++++++++++++------------------ src/regexp/exec.go | 107 +++++++++++++----------- src/regexp/regexp.go | 18 ++-- 3 files changed, 162 insertions(+), 139 deletions(-) diff --git a/src/regexp/backtrack.go b/src/regexp/backtrack.go index 440bf7ffc5..239abc3a57 100644 --- a/src/regexp/backtrack.go +++ b/src/regexp/backtrack.go @@ -14,7 +14,10 @@ package regexp -import "regexp/syntax" +import ( + "regexp/syntax" + "sync" +) // A job is an entry on the backtracker's job stack. It holds // the instruction pc and the position in the input. @@ -32,15 +35,29 @@ const ( // bitState holds state for the backtracker. type bitState struct { - prog *syntax.Prog + end int + cap []int + matchcap []int + jobs []job + visited []uint32 - end int - cap []int - jobs []job - visited []uint32 + inputs inputs } -var notBacktrack *bitState = nil +var bitStatePool sync.Pool + +func newBitState() *bitState { + b, ok := bitStatePool.Get().(*bitState) + if !ok { + b = new(bitState) + } + return b +} + +func freeBitState(b *bitState) { + b.inputs.clear() + bitStatePool.Put(b) +} // maxBitStateLen returns the maximum length of a string to search with // the backtracker using prog. @@ -51,18 +68,6 @@ func maxBitStateLen(prog *syntax.Prog) int { return maxBacktrackVector / len(prog.Inst) } -// newBitState returns a new bitState for the given prog, -// or notBacktrack if the size of the prog exceeds the maximum size that -// the backtracker will be run for. -func newBitState(prog *syntax.Prog) *bitState { - if !shouldBacktrack(prog) { - return notBacktrack - } - return &bitState{ - prog: prog, - } -} - // shouldBacktrack reports whether the program is too // long for the backtracker to run. func shouldBacktrack(prog *syntax.Prog) bool { @@ -72,7 +77,7 @@ func shouldBacktrack(prog *syntax.Prog) bool { // reset resets the state of the backtracker. // end is the end position in the input. // ncap is the number of captures. -func (b *bitState) reset(end int, ncap int) { +func (b *bitState) reset(prog *syntax.Prog, end int, ncap int) { b.end = end if cap(b.jobs) == 0 { @@ -81,7 +86,7 @@ func (b *bitState) reset(end int, ncap int) { b.jobs = b.jobs[:0] } - visitedSize := (len(b.prog.Inst)*(end+1) + visitedBits - 1) / visitedBits + visitedSize := (len(prog.Inst)*(end+1) + visitedBits - 1) / visitedBits if cap(b.visited) < visitedSize { b.visited = make([]uint32, visitedSize, maxBacktrackVector/visitedBits) } else { @@ -99,6 +104,15 @@ func (b *bitState) reset(end int, ncap int) { for i := range b.cap { b.cap[i] = -1 } + + if cap(b.matchcap) < ncap { + b.matchcap = make([]int, ncap) + } else { + b.matchcap = b.matchcap[:ncap] + } + for i := range b.matchcap { + b.matchcap[i] = -1 + } } // shouldVisit reports whether the combination of (pc, pos) has not @@ -114,20 +128,19 @@ func (b *bitState) shouldVisit(pc uint32, pos int) bool { // push pushes (pc, pos, arg) onto the job stack if it should be // visited. -func (b *bitState) push(pc uint32, pos int, arg bool) { +func (b *bitState) push(re *Regexp, pc uint32, pos int, arg bool) { // Only check shouldVisit when arg is false. // When arg is true, we are continuing a previous visit. - if b.prog.Inst[pc].Op != syntax.InstFail && (arg || b.shouldVisit(pc, pos)) { + if re.prog.Inst[pc].Op != syntax.InstFail && (arg || b.shouldVisit(pc, pos)) { b.jobs = append(b.jobs, job{pc: pc, arg: arg, pos: pos}) } } // tryBacktrack runs a backtracking search starting at pos. -func (m *machine) tryBacktrack(b *bitState, i input, pc uint32, pos int) bool { - longest := m.re.longest - m.matched = false +func (re *Regexp) tryBacktrack(b *bitState, i input, pc uint32, pos int) bool { + longest := re.longest - b.push(pc, pos, false) + b.push(re, pc, pos, false) for len(b.jobs) > 0 { l := len(b.jobs) - 1 // Pop job off the stack. @@ -150,7 +163,7 @@ func (m *machine) tryBacktrack(b *bitState, i input, pc uint32, pos int) bool { } Skip: - inst := b.prog.Inst[pc] + inst := re.prog.Inst[pc] switch inst.Op { default: @@ -172,23 +185,23 @@ func (m *machine) tryBacktrack(b *bitState, i input, pc uint32, pos int) bool { pc = inst.Arg goto CheckAndLoop } else { - b.push(pc, pos, true) + b.push(re, pc, pos, true) pc = inst.Out goto CheckAndLoop } case syntax.InstAltMatch: // One opcode consumes runes; the other leads to match. - switch b.prog.Inst[inst.Out].Op { + switch re.prog.Inst[inst.Out].Op { case syntax.InstRune, syntax.InstRune1, syntax.InstRuneAny, syntax.InstRuneAnyNotNL: // inst.Arg is the match. - b.push(inst.Arg, pos, false) + b.push(re, inst.Arg, pos, false) pc = inst.Arg pos = b.end goto CheckAndLoop } // inst.Out is the match - non-greedy - b.push(inst.Out, b.end, false) + b.push(re, inst.Out, b.end, false) pc = inst.Out goto CheckAndLoop @@ -236,7 +249,7 @@ func (m *machine) tryBacktrack(b *bitState, i input, pc uint32, pos int) bool { } else { if 0 <= inst.Arg && inst.Arg < uint32(len(b.cap)) { // Capture pos to register, but save old value. - b.push(pc, b.cap[inst.Arg], true) // come back when we're done. + b.push(re, pc, b.cap[inst.Arg], true) // come back when we're done. b.cap[inst.Arg] = pos } pc = inst.Out @@ -258,8 +271,7 @@ func (m *machine) tryBacktrack(b *bitState, i input, pc uint32, pos int) bool { // We found a match. If the caller doesn't care // where the match is, no point going further. if len(b.cap) == 0 { - m.matched = true - return m.matched + return true } // Record best match so far. @@ -268,19 +280,18 @@ func (m *machine) tryBacktrack(b *bitState, i input, pc uint32, pos int) bool { if len(b.cap) > 1 { b.cap[1] = pos } - if !m.matched || (longest && pos > 0 && pos > m.matchcap[1]) { - copy(m.matchcap, b.cap) + if old := b.matchcap[1]; old == -1 || (longest && pos > 0 && pos > old) { + copy(b.matchcap, b.cap) } - m.matched = true // If going for first match, we're done. if !longest { - return m.matched + return true } // If we used the entire text, no longer match is possible. if pos == b.end { - return m.matched + return true } // Otherwise, continue on in hope of a longer match. @@ -288,65 +299,68 @@ func (m *machine) tryBacktrack(b *bitState, i input, pc uint32, pos int) bool { } } - return m.matched + return longest && len(b.matchcap) > 1 && b.matchcap[1] >= 0 } // backtrack runs a backtracking search of prog on the input starting at pos. -func (m *machine) backtrack(i input, pos int, end int, ncap int) bool { - if !i.canCheckPrefix() { - panic("backtrack called for a RuneReader") - } - - startCond := m.re.cond +func (re *Regexp) backtrack(ib []byte, is string, pos int, ncap int, dstCap []int) []int { + startCond := re.cond if startCond == ^syntax.EmptyOp(0) { // impossible - return false + return nil } if startCond&syntax.EmptyBeginText != 0 && pos != 0 { // Anchored match, past beginning of text. - return false + return nil } - b := m.b - b.reset(end, ncap) - - m.matchcap = m.matchcap[:ncap] - for i := range m.matchcap { - m.matchcap[i] = -1 - } + b := newBitState() + i, end := b.inputs.init(nil, ib, is) + b.reset(re.prog, end, ncap) // Anchored search must start at the beginning of the input if startCond&syntax.EmptyBeginText != 0 { if len(b.cap) > 0 { b.cap[0] = pos } - return m.tryBacktrack(b, i, uint32(m.p.Start), pos) - } + if !re.tryBacktrack(b, i, uint32(re.prog.Start), pos) { + freeBitState(b) + return nil + } + } else { - // Unanchored search, starting from each possible text position. - // Notice that we have to try the empty string at the end of - // the text, so the loop condition is pos <= end, not pos < end. - // This looks like it's quadratic in the size of the text, - // but we are not clearing visited between calls to TrySearch, - // so no work is duplicated and it ends up still being linear. - width := -1 - for ; pos <= end && width != 0; pos += width { - if len(m.re.prefix) > 0 { - // Match requires literal prefix; fast search for it. - advance := i.index(m.re, pos) - if advance < 0 { - return false + // Unanchored search, starting from each possible text position. + // Notice that we have to try the empty string at the end of + // the text, so the loop condition is pos <= end, not pos < end. + // This looks like it's quadratic in the size of the text, + // but we are not clearing visited between calls to TrySearch, + // so no work is duplicated and it ends up still being linear. + width := -1 + for ; pos <= end && width != 0; pos += width { + if len(re.prefix) > 0 { + // Match requires literal prefix; fast search for it. + advance := i.index(re, pos) + if advance < 0 { + freeBitState(b) + return nil + } + pos += advance } - pos += advance - } - if len(b.cap) > 0 { - b.cap[0] = pos + if len(b.cap) > 0 { + b.cap[0] = pos + } + if re.tryBacktrack(b, i, uint32(re.prog.Start), pos) { + // Match must be leftmost; done. + goto Match + } + _, width = i.step(pos) } - if m.tryBacktrack(b, i, uint32(m.p.Start), pos) { - // Match must be leftmost; done. - return true - } - _, width = i.step(pos) + freeBitState(b) + return nil } - return false + +Match: + dstCap = append(dstCap, b.matchcap...) + freeBitState(b) + return dstCap } diff --git a/src/regexp/exec.go b/src/regexp/exec.go index 1c7b02d1cd..271174670e 100644 --- a/src/regexp/exec.go +++ b/src/regexp/exec.go @@ -35,37 +35,61 @@ type thread struct { // A machine holds all the state during an NFA simulation for p. type machine struct { - re *Regexp // corresponding Regexp - p *syntax.Prog // compiled program - op *onePassProg // compiled onepass program, or notOnePass - maxBitStateLen int // max length of string to search with bitstate - b *bitState // state for backtracker, allocated lazily - q0, q1 queue // two queues for runq, nextq - pool []*thread // pool of available threads - matched bool // whether a match was found - matchcap []int // capture information for the match + re *Regexp // corresponding Regexp + p *syntax.Prog // compiled program + op *onePassProg // compiled onepass program, or notOnePass + q0, q1 queue // two queues for runq, nextq + pool []*thread // pool of available threads + matched bool // whether a match was found + matchcap []int // capture information for the match + inputs inputs +} + +type inputs struct { // cached inputs, to avoid allocation - inputBytes inputBytes - inputString inputString - inputReader inputReader + bytes inputBytes + string inputString + reader inputReader } -func (m *machine) newInputBytes(b []byte) input { - m.inputBytes.str = b - return &m.inputBytes +func (i *inputs) newBytes(b []byte) input { + i.bytes.str = b + return &i.bytes } -func (m *machine) newInputString(s string) input { - m.inputString.str = s - return &m.inputString +func (i *inputs) newString(s string) input { + i.string.str = s + return &i.string } -func (m *machine) newInputReader(r io.RuneReader) input { - m.inputReader.r = r - m.inputReader.atEOT = false - m.inputReader.pos = 0 - return &m.inputReader +func (i *inputs) newReader(r io.RuneReader) input { + i.reader.r = r + i.reader.atEOT = false + i.reader.pos = 0 + return &i.reader +} + +func (i *inputs) clear() { + // We need to clear 1 of these. + // Avoid the expense of clearing the others (pointer write barrier). + if i.bytes.str != nil { + i.bytes.str = nil + } else if i.reader.r != nil { + i.reader.r = nil + } else { + i.string.str = "" + } +} + +func (i *inputs) init(r io.RuneReader, b []byte, s string) (input, int) { + if r != nil { + return i.newReader(r), 0 + } + if b != nil { + return i.newBytes(b), len(b) + } + return i.newString(s), len(s) } // progMachine returns a new machine running the prog p. @@ -78,9 +102,6 @@ func progMachine(p *syntax.Prog, op *onePassProg) *machine { if ncap < 2 { ncap = 2 } - if op == notOnePass { - m.maxBitStateLen = maxBitStateLen(p) - } m.matchcap = make([]int, ncap) return m } @@ -416,31 +437,23 @@ func (re *Regexp) doMatch(r io.RuneReader, b []byte, s string) bool { // // nil is returned if no matches are found and non-nil if matches are found. func (re *Regexp) doExecute(r io.RuneReader, b []byte, s string, pos int, ncap int, dstCap []int) []int { - m := re.get() - var i input - var size int - if r != nil { - i = m.newInputReader(r) - } else if b != nil { - i = m.newInputBytes(b) - size = len(b) - } else { - i = m.newInputString(s) - size = len(s) + if dstCap == nil { + // Make sure 'return dstCap' is non-nil. + dstCap = arrayNoInts[:0:0] } + + if re.onepass == notOnePass && r == nil && len(b)+len(s) < re.maxBitStateLen { + return re.backtrack(b, s, pos, ncap, dstCap) + } + + m := re.get() + i, _ := m.inputs.init(r, b, s) + if m.op != notOnePass { if !m.onepass(i, pos, ncap) { re.put(m) return nil } - } else if size < m.maxBitStateLen && r == nil { - if m.b == nil { - m.b = newBitState(m.p) - } - if !m.backtrack(i, pos, size, ncap) { - re.put(m) - return nil - } } else { m.init(ncap) if !m.match(i, pos) { @@ -449,10 +462,6 @@ func (re *Regexp) doExecute(r io.RuneReader, b []byte, s string, pos int, ncap i } } dstCap = append(dstCap, m.matchcap...) - if dstCap == nil { - // Keep the promise of returning non-nil value on match. - dstCap = arrayNoInts[:0] - } re.put(m) return dstCap } diff --git a/src/regexp/regexp.go b/src/regexp/regexp.go index 89bb975ac1..dafcfd433d 100644 --- a/src/regexp/regexp.go +++ b/src/regexp/regexp.go @@ -88,17 +88,18 @@ type Regexp struct { } type regexpRO struct { - expr string // as passed to Compile - prog *syntax.Prog // compiled program - onepass *onePassProg // onepass program or nil + expr string // as passed to Compile + prog *syntax.Prog // compiled program + onepass *onePassProg // onepass program or nil + numSubexp int + maxBitStateLen int + subexpNames []string prefix string // required prefix in unanchored matches prefixBytes []byte // prefix, as a []byte - prefixComplete bool // prefix is the entire regexp prefixRune rune // first rune in prefix prefixEnd uint32 // pc for last rune in prefix + prefixComplete bool // prefix is the entire regexp cond syntax.EmptyOp // empty-width conditions required at start of match - numSubexp int - subexpNames []string longest bool } @@ -192,6 +193,7 @@ func compile(expr string, mode syntax.Flags, longest bool) (*Regexp, error) { } if regexp.onepass == notOnePass { regexp.prefix, regexp.prefixComplete = prog.Prefix() + regexp.maxBitStateLen = maxBitStateLen(prog) } else { regexp.prefix, regexp.prefixComplete, regexp.prefixEnd = onePassPrefix(prog) } @@ -227,9 +229,7 @@ func (re *Regexp) get() *machine { // run using re. (The cache empties when re gets garbage collected.) func (re *Regexp) put(z *machine) { // Remove references to input data that we no longer need. - z.inputBytes.str = nil - z.inputString.str = "" - z.inputReader.r = nil + z.inputs.clear() re.mu.Lock() re.machine = append(re.machine, z) From 60b297118043eef54eb924d81f940e79c0316433 Mon Sep 17 00:00:00 2001 From: Russ Cox Date: Tue, 2 Oct 2018 09:29:47 -0400 Subject: [PATCH 111/240] regexp: split one-pass execution out of machine struct MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This allows the one-pass executions to have their own pool of (much smaller) allocated structures. A step toward eliminating the per-Regexp machine cache. Not much effect on benchmarks, since there are no optimizations here, and pools are a tiny bit slower than a locked data structure for single-threaded code. name old time/op new time/op delta Find-12 254ns ± 0% 252ns ± 0% -0.94% (p=0.000 n=9+10) FindAllNoMatches-12 135ns ± 0% 134ns ± 1% -0.49% (p=0.002 n=9+9) FindString-12 247ns ± 0% 246ns ± 0% -0.24% (p=0.003 n=8+10) FindSubmatch-12 334ns ± 0% 333ns ± 2% ~ (p=0.283 n=10+10) FindStringSubmatch-12 321ns ± 0% 320ns ± 0% -0.51% (p=0.000 n=9+10) Literal-12 92.2ns ± 0% 91.1ns ± 0% -1.25% (p=0.000 n=9+10) NotLiteral-12 1.47µs ± 0% 1.45µs ± 0% -0.99% (p=0.000 n=9+10) MatchClass-12 2.17µs ± 0% 2.19µs ± 0% +0.84% (p=0.000 n=7+9) MatchClass_InRange-12 2.13µs ± 0% 2.09µs ± 0% -1.70% (p=0.000 n=10+10) ReplaceAll-12 1.39µs ± 0% 1.39µs ± 0% +0.51% (p=0.000 n=10+10) AnchoredLiteralShortNonMatch-12 83.2ns ± 0% 82.4ns ± 0% -0.96% (p=0.000 n=8+8) AnchoredLiteralLongNonMatch-12 105ns ± 0% 106ns ± 1% ~ (p=0.087 n=10+10) AnchoredShortMatch-12 131ns ± 0% 130ns ± 0% -0.76% (p=0.000 n=10+9) AnchoredLongMatch-12 267ns ± 0% 272ns ± 0% +2.01% (p=0.000 n=10+8) OnePassShortA-12 611ns ± 0% 615ns ± 0% +0.61% (p=0.000 n=9+10) NotOnePassShortA-12 552ns ± 0% 549ns ± 0% -0.46% (p=0.000 n=8+9) OnePassShortB-12 491ns ± 0% 494ns ± 0% +0.61% (p=0.000 n=8+8) NotOnePassShortB-12 412ns ± 0% 412ns ± 1% ~ (p=0.151 n=9+10) OnePassLongPrefix-12 112ns ± 0% 108ns ± 0% -3.57% (p=0.000 n=10+10) OnePassLongNotPrefix-12 410ns ± 0% 402ns ± 0% -1.95% (p=0.000 n=9+8) MatchParallelShared-12 38.8ns ± 1% 38.6ns ± 2% ~ (p=0.536 n=10+9) MatchParallelCopied-12 39.2ns ± 3% 39.4ns ± 7% ~ (p=0.986 n=10+10) QuoteMetaAll-12 94.6ns ± 0% 94.9ns ± 0% +0.29% (p=0.001 n=8+9) QuoteMetaNone-12 52.7ns ± 0% 52.7ns ± 0% ~ (all equal) Match/Easy0/32-12 72.9ns ± 0% 72.1ns ± 0% -1.07% (p=0.000 n=9+9) Match/Easy0/1K-12 298ns ± 0% 298ns ± 0% ~ (p=0.140 n=6+8) Match/Easy0/32K-12 4.60µs ± 2% 4.64µs ± 1% ~ (p=0.171 n=10+10) Match/Easy0/1M-12 235µs ± 0% 234µs ± 0% -0.14% (p=0.004 n=10+10) Match/Easy0/32M-12 7.96ms ± 0% 7.95ms ± 0% -0.12% (p=0.043 n=10+9) Match/Easy0i/32-12 1.09µs ± 0% 1.10µs ± 0% +0.15% (p=0.000 n=8+9) Match/Easy0i/1K-12 31.7µs ± 0% 31.8µs ± 1% ~ (p=0.905 n=9+10) Match/Easy0i/32K-12 1.61ms ± 0% 1.62ms ± 1% +1.12% (p=0.000 n=9+10) Match/Easy0i/1M-12 51.4ms ± 0% 51.8ms ± 0% +0.85% (p=0.000 n=8+8) Match/Easy0i/32M-12 1.65s ± 1% 1.65s ± 0% ~ (p=0.113 n=9+9) Match/Easy1/32-12 67.9ns ± 0% 67.7ns ± 1% ~ (p=0.232 n=8+10) Match/Easy1/1K-12 884ns ± 0% 873ns ± 0% -1.29% (p=0.000 n=9+10) Match/Easy1/32K-12 39.2µs ± 0% 39.4µs ± 0% +0.50% (p=0.000 n=9+10) Match/Easy1/1M-12 1.39ms ± 0% 1.39ms ± 0% +0.29% (p=0.000 n=9+10) Match/Easy1/32M-12 44.2ms ± 1% 44.3ms ± 0% +0.21% (p=0.029 n=10+10) Match/Medium/32-12 1.05µs ± 0% 1.04µs ± 0% -0.27% (p=0.001 n=8+9) Match/Medium/1K-12 31.3µs ± 0% 31.4µs ± 0% +0.39% (p=0.000 n=9+8) Match/Medium/32K-12 1.45ms ± 0% 1.45ms ± 0% +0.33% (p=0.000 n=8+9) Match/Medium/1M-12 46.2ms ± 0% 46.4ms ± 0% +0.35% (p=0.000 n=9+8) Match/Medium/32M-12 1.48s ± 0% 1.49s ± 1% +0.70% (p=0.000 n=8+10) Match/Hard/32-12 1.49µs ± 0% 1.48µs ± 0% -0.43% (p=0.000 n=10+9) Match/Hard/1K-12 45.1µs ± 1% 45.0µs ± 1% ~ (p=0.393 n=10+10) Match/Hard/32K-12 2.18ms ± 1% 2.24ms ± 0% +2.71% (p=0.000 n=9+8) Match/Hard/1M-12 69.7ms ± 1% 71.6ms ± 0% +2.76% (p=0.000 n=9+7) Match/Hard/32M-12 2.23s ± 1% 2.29s ± 0% +2.65% (p=0.000 n=9+9) Match/Hard1/32-12 7.89µs ± 0% 7.89µs ± 0% ~ (p=0.286 n=9+9) Match/Hard1/1K-12 244µs ± 0% 244µs ± 0% ~ (p=0.905 n=9+10) Match/Hard1/32K-12 10.3ms ± 0% 10.3ms ± 0% ~ (p=0.796 n=10+10) Match/Hard1/1M-12 331ms ± 0% 331ms ± 0% ~ (p=0.167 n=8+9) Match/Hard1/32M-12 10.6s ± 0% 10.6s ± 0% ~ (p=0.315 n=8+10) Match_onepass_regex/32-12 812ns ± 0% 830ns ± 0% +2.19% (p=0.000 n=10+9) Match_onepass_regex/1K-12 28.5µs ± 0% 28.7µs ± 1% +0.97% (p=0.000 n=10+9) Match_onepass_regex/32K-12 936µs ± 0% 949µs ± 0% +1.43% (p=0.000 n=10+8) Match_onepass_regex/1M-12 30.2ms ± 0% 30.4ms ± 0% +0.62% (p=0.000 n=10+8) Match_onepass_regex/32M-12 970ms ± 0% 973ms ± 0% +0.35% (p=0.000 n=10+9) CompileOnepass-12 4.63µs ± 1% 4.64µs ± 0% ~ (p=0.060 n=10+10) [Geo mean] 23.3µs 23.3µs +0.12% https://perf.golang.org/search?q=upload:20181004.2 Change-Id: Iff9e9f9d4a4698162126a2f300e8ed1b1a39361e Reviewed-on: https://go-review.googlesource.com/c/139780 Run-TryBot: Russ Cox TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/regexp/all_test.go | 4 +- src/regexp/exec.go | 115 ++++++++++++++++++++++++------------- src/regexp/exec_test.go | 2 +- src/regexp/onepass.go | 24 ++++---- src/regexp/onepass_test.go | 86 ++++++++++++++------------- src/regexp/regexp.go | 4 +- 6 files changed, 132 insertions(+), 103 deletions(-) diff --git a/src/regexp/all_test.go b/src/regexp/all_test.go index 0fabeae59f..8cbc2962cb 100644 --- a/src/regexp/all_test.go +++ b/src/regexp/all_test.go @@ -550,8 +550,8 @@ func TestOnePassCutoff(t *testing.T) { if err != nil { t.Fatalf("compile: %v", err) } - if compileOnePass(p) != notOnePass { - t.Fatalf("makeOnePass succeeded; wanted notOnePass") + if compileOnePass(p) != nil { + t.Fatalf("makeOnePass succeeded; wanted nil") } } diff --git a/src/regexp/exec.go b/src/regexp/exec.go index 271174670e..23908d22d5 100644 --- a/src/regexp/exec.go +++ b/src/regexp/exec.go @@ -7,6 +7,7 @@ package regexp import ( "io" "regexp/syntax" + "sync" ) // A queue is a 'sparse array' holding pending threads of execution. @@ -37,7 +38,6 @@ type thread struct { type machine struct { re *Regexp // corresponding Regexp p *syntax.Prog // compiled program - op *onePassProg // compiled onepass program, or notOnePass q0, q1 queue // two queues for runq, nextq pool []*thread // pool of available threads matched bool // whether a match was found @@ -93,8 +93,8 @@ func (i *inputs) init(r io.RuneReader, b []byte, s string) (input, int) { } // progMachine returns a new machine running the prog p. -func progMachine(p *syntax.Prog, op *onePassProg) *machine { - m := &machine{p: p, op: op} +func progMachine(p *syntax.Prog) *machine { + m := &machine{p: p} n := len(m.p.Inst) m.q0 = queue{make([]uint32, n), make([]entry, 0, n)} m.q1 = queue{make([]uint32, n), make([]entry, 0, n)} @@ -327,20 +327,47 @@ func (m *machine) add(q *queue, pc uint32, pos int, cap []int, cond syntax.Empty return t } -// onepass runs the machine over the input starting at pos. -// It reports whether a match was found. -// If so, m.matchcap holds the submatch information. -// ncap is the number of captures. -func (m *machine) onepass(i input, pos, ncap int) bool { - startCond := m.re.cond - if startCond == ^syntax.EmptyOp(0) { // impossible - return false +type onePassMachine struct { + inputs inputs + matchcap []int +} + +var onePassPool sync.Pool + +func newOnePassMachine() *onePassMachine { + m, ok := onePassPool.Get().(*onePassMachine) + if !ok { + m = new(onePassMachine) } - m.matched = false - m.matchcap = m.matchcap[:ncap] + return m +} + +func freeOnePassMachine(m *onePassMachine) { + m.inputs.clear() + onePassPool.Put(m) +} + +// doOnePass implements r.doExecute using the one-pass execution engine. +func (re *Regexp) doOnePass(ir io.RuneReader, ib []byte, is string, pos, ncap int, dstCap []int) []int { + startCond := re.cond + if startCond == ^syntax.EmptyOp(0) { // impossible + return nil + } + + m := newOnePassMachine() + if cap(m.matchcap) < ncap { + m.matchcap = make([]int, ncap) + } else { + m.matchcap = m.matchcap[:ncap] + } + + matched := false for i := range m.matchcap { m.matchcap[i] = -1 } + + i, _ := m.inputs.init(ir, ib, is) + r, r1 := endOfText, endOfText width, width1 := 0, 0 r, width = i.step(pos) @@ -353,59 +380,59 @@ func (m *machine) onepass(i input, pos, ncap int) bool { } else { flag = i.context(pos) } - pc := m.op.Start - inst := m.op.Inst[pc] + pc := re.onepass.Start + inst := re.onepass.Inst[pc] // If there is a simple literal prefix, skip over it. if pos == 0 && syntax.EmptyOp(inst.Arg)&^flag == 0 && - len(m.re.prefix) > 0 && i.canCheckPrefix() { + len(re.prefix) > 0 && i.canCheckPrefix() { // Match requires literal prefix; fast search for it. - if !i.hasPrefix(m.re) { - return m.matched + if !i.hasPrefix(re) { + goto Return } - pos += len(m.re.prefix) + pos += len(re.prefix) r, width = i.step(pos) r1, width1 = i.step(pos + width) flag = i.context(pos) - pc = int(m.re.prefixEnd) + pc = int(re.prefixEnd) } for { - inst = m.op.Inst[pc] + inst = re.onepass.Inst[pc] pc = int(inst.Out) switch inst.Op { default: panic("bad inst") case syntax.InstMatch: - m.matched = true + matched = true if len(m.matchcap) > 0 { m.matchcap[0] = 0 m.matchcap[1] = pos } - return m.matched + goto Return case syntax.InstRune: if !inst.MatchRune(r) { - return m.matched + goto Return } case syntax.InstRune1: if r != inst.Rune[0] { - return m.matched + goto Return } case syntax.InstRuneAny: // Nothing case syntax.InstRuneAnyNotNL: if r == '\n' { - return m.matched + goto Return } // peek at the input rune to see which branch of the Alt to take case syntax.InstAlt, syntax.InstAltMatch: pc = int(onePassNext(&inst, r)) continue case syntax.InstFail: - return m.matched + goto Return case syntax.InstNop: continue case syntax.InstEmptyWidth: if syntax.EmptyOp(inst.Arg)&^flag != 0 { - return m.matched + goto Return } continue case syntax.InstCapture: @@ -424,7 +451,16 @@ func (m *machine) onepass(i input, pos, ncap int) bool { r1, width1 = i.step(pos + width) } } - return m.matched + +Return: + if !matched { + freeOnePassMachine(m) + return nil + } + + dstCap = append(dstCap, m.matchcap...) + freeOnePassMachine(m) + return dstCap } // doMatch reports whether either r, b or s match the regexp. @@ -442,25 +478,22 @@ func (re *Regexp) doExecute(r io.RuneReader, b []byte, s string, pos int, ncap i dstCap = arrayNoInts[:0:0] } - if re.onepass == notOnePass && r == nil && len(b)+len(s) < re.maxBitStateLen { + if re.onepass != nil { + return re.doOnePass(r, b, s, pos, ncap, dstCap) + } + if r == nil && len(b)+len(s) < re.maxBitStateLen { return re.backtrack(b, s, pos, ncap, dstCap) } m := re.get() i, _ := m.inputs.init(r, b, s) - if m.op != notOnePass { - if !m.onepass(i, pos, ncap) { - re.put(m) - return nil - } - } else { - m.init(ncap) - if !m.match(i, pos) { - re.put(m) - return nil - } + m.init(ncap) + if !m.match(i, pos) { + re.put(m) + return nil } + dstCap = append(dstCap, m.matchcap...) re.put(m) return dstCap diff --git a/src/regexp/exec_test.go b/src/regexp/exec_test.go index 02258e6e74..1489219328 100644 --- a/src/regexp/exec_test.go +++ b/src/regexp/exec_test.go @@ -684,7 +684,7 @@ func BenchmarkMatch(b *testing.B) { func BenchmarkMatch_onepass_regex(b *testing.B) { isRaceBuilder := strings.HasSuffix(testenv.Builder(), "-race") r := MustCompile(`(?s)\A.*\z`) - if r.get().op == notOnePass { + if r.onepass == nil { b.Fatalf("want onepass regex, but %q is not onepass", r) } for _, size := range benchSizes { diff --git a/src/regexp/onepass.go b/src/regexp/onepass.go index 125be59a7d..2f3ce6f9f6 100644 --- a/src/regexp/onepass.go +++ b/src/regexp/onepass.go @@ -294,12 +294,12 @@ var anyRune = []rune{0, unicode.MaxRune} // makeOnePass creates a onepass Prog, if possible. It is possible if at any alt, // the match engine can always tell which branch to take. The routine may modify // p if it is turned into a onepass Prog. If it isn't possible for this to be a -// onepass Prog, the Prog notOnePass is returned. makeOnePass is recursive +// onepass Prog, the Prog nil is returned. makeOnePass is recursive // to the size of the Prog. func makeOnePass(p *onePassProg) *onePassProg { // If the machine is very long, it's not worth the time to check if we can use one pass. if len(p.Inst) >= 1000 { - return notOnePass + return nil } var ( @@ -446,11 +446,11 @@ func makeOnePass(p *onePassProg) *onePassProg { visitQueue.clear() pc := instQueue.next() if !check(pc, m) { - p = notOnePass + p = nil break } } - if p != notOnePass { + if p != nil { for i := range p.Inst { p.Inst[i].Rune = onePassRunes[i] } @@ -458,20 +458,18 @@ func makeOnePass(p *onePassProg) *onePassProg { return p } -var notOnePass *onePassProg = nil - // compileOnePass returns a new *syntax.Prog suitable for onePass execution if the original Prog -// can be recharacterized as a one-pass regexp program, or syntax.notOnePass if the +// can be recharacterized as a one-pass regexp program, or syntax.nil if the // Prog cannot be converted. For a one pass prog, the fundamental condition that must // be true is: at any InstAlt, there must be no ambiguity about what branch to take. func compileOnePass(prog *syntax.Prog) (p *onePassProg) { if prog.Start == 0 { - return notOnePass + return nil } // onepass regexp is anchored if prog.Inst[prog.Start].Op != syntax.InstEmptyWidth || syntax.EmptyOp(prog.Inst[prog.Start].Arg)&syntax.EmptyBeginText != syntax.EmptyBeginText { - return notOnePass + return nil } // every instruction leading to InstMatch must be EmptyEndText for _, inst := range prog.Inst { @@ -479,18 +477,18 @@ func compileOnePass(prog *syntax.Prog) (p *onePassProg) { switch inst.Op { default: if opOut == syntax.InstMatch { - return notOnePass + return nil } case syntax.InstAlt, syntax.InstAltMatch: if opOut == syntax.InstMatch || prog.Inst[inst.Arg].Op == syntax.InstMatch { - return notOnePass + return nil } case syntax.InstEmptyWidth: if opOut == syntax.InstMatch { if syntax.EmptyOp(inst.Arg)&syntax.EmptyEndText == syntax.EmptyEndText { continue } - return notOnePass + return nil } } } @@ -501,7 +499,7 @@ func compileOnePass(prog *syntax.Prog) (p *onePassProg) { // checkAmbiguity on InstAlts, build onepass Prog if possible p = makeOnePass(p) - if p != notOnePass { + if p != nil { cleanupOnePass(p, prog) } return p diff --git a/src/regexp/onepass_test.go b/src/regexp/onepass_test.go index 6b622ac356..a0f2e39048 100644 --- a/src/regexp/onepass_test.go +++ b/src/regexp/onepass_test.go @@ -134,47 +134,45 @@ func TestMergeRuneSet(t *testing.T) { } } -var onePass = &onePassProg{} - var onePassTests = []struct { - re string - onePass *onePassProg + re string + isOnePass bool }{ - {`^(?:a|(?:a*))$`, notOnePass}, - {`^(?:(a)|(?:a*))$`, notOnePass}, - {`^(?:(?:(?:.(?:$))?))$`, onePass}, - {`^abcd$`, onePass}, - {`^(?:(?:a{0,})*?)$`, onePass}, - {`^(?:(?:a+)*)$`, onePass}, - {`^(?:(?:a|(?:aa)))$`, onePass}, - {`^(?:[^\s\S])$`, onePass}, - {`^(?:(?:a{3,4}){0,})$`, notOnePass}, - {`^(?:(?:(?:a*)+))$`, onePass}, - {`^[a-c]+$`, onePass}, - {`^[a-c]*$`, onePass}, - {`^(?:a*)$`, onePass}, - {`^(?:(?:aa)|a)$`, onePass}, - {`^[a-c]*`, notOnePass}, - {`^...$`, onePass}, - {`^(?:a|(?:aa))$`, onePass}, - {`^a((b))c$`, onePass}, - {`^a.[l-nA-Cg-j]?e$`, onePass}, - {`^a((b))$`, onePass}, - {`^a(?:(b)|(c))c$`, onePass}, - {`^a(?:(b*)|(c))c$`, notOnePass}, - {`^a(?:b|c)$`, onePass}, - {`^a(?:b?|c)$`, onePass}, - {`^a(?:b?|c?)$`, notOnePass}, - {`^a(?:b?|c+)$`, onePass}, - {`^a(?:b+|(bc))d$`, notOnePass}, - {`^a(?:bc)+$`, onePass}, - {`^a(?:[bcd])+$`, onePass}, - {`^a((?:[bcd])+)$`, onePass}, - {`^a(:?b|c)*d$`, onePass}, - {`^.bc(d|e)*$`, onePass}, - {`^(?:(?:aa)|.)$`, notOnePass}, - {`^(?:(?:a{1,2}){1,2})$`, notOnePass}, - {`^l` + strings.Repeat("o", 2<<8) + `ng$`, onePass}, + {`^(?:a|(?:a*))$`, false}, + {`^(?:(a)|(?:a*))$`, false}, + {`^(?:(?:(?:.(?:$))?))$`, true}, + {`^abcd$`, true}, + {`^(?:(?:a{0,})*?)$`, true}, + {`^(?:(?:a+)*)$`, true}, + {`^(?:(?:a|(?:aa)))$`, true}, + {`^(?:[^\s\S])$`, true}, + {`^(?:(?:a{3,4}){0,})$`, false}, + {`^(?:(?:(?:a*)+))$`, true}, + {`^[a-c]+$`, true}, + {`^[a-c]*$`, true}, + {`^(?:a*)$`, true}, + {`^(?:(?:aa)|a)$`, true}, + {`^[a-c]*`, false}, + {`^...$`, true}, + {`^(?:a|(?:aa))$`, true}, + {`^a((b))c$`, true}, + {`^a.[l-nA-Cg-j]?e$`, true}, + {`^a((b))$`, true}, + {`^a(?:(b)|(c))c$`, true}, + {`^a(?:(b*)|(c))c$`, false}, + {`^a(?:b|c)$`, true}, + {`^a(?:b?|c)$`, true}, + {`^a(?:b?|c?)$`, false}, + {`^a(?:b?|c+)$`, true}, + {`^a(?:b+|(bc))d$`, false}, + {`^a(?:bc)+$`, true}, + {`^a(?:[bcd])+$`, true}, + {`^a((?:[bcd])+)$`, true}, + {`^a(:?b|c)*d$`, true}, + {`^.bc(d|e)*$`, true}, + {`^(?:(?:aa)|.)$`, false}, + {`^(?:(?:a{1,2}){1,2})$`, false}, + {`^l` + strings.Repeat("o", 2<<8) + `ng$`, true}, } func TestCompileOnePass(t *testing.T) { @@ -194,9 +192,9 @@ func TestCompileOnePass(t *testing.T) { t.Errorf("Compile(%q) got err:%s, want success", test.re, err) continue } - onePass = compileOnePass(p) - if (onePass == notOnePass) != (test.onePass == notOnePass) { - t.Errorf("CompileOnePass(%q) got %v, expected %v", test.re, onePass, test.onePass) + isOnePass := compileOnePass(p) != nil + if isOnePass != test.isOnePass { + t.Errorf("CompileOnePass(%q) got isOnePass=%v, expected %v", test.re, isOnePass, test.isOnePass) } } } @@ -216,8 +214,8 @@ func TestRunOnePass(t *testing.T) { t.Errorf("Compile(%q): got err: %s", test.re, err) continue } - if re.onepass == notOnePass { - t.Errorf("Compile(%q): got notOnePass, want one-pass", test.re) + if re.onepass == nil { + t.Errorf("Compile(%q): got nil, want one-pass", test.re) continue } if !re.MatchString(test.match) { diff --git a/src/regexp/regexp.go b/src/regexp/regexp.go index dafcfd433d..3730552c13 100644 --- a/src/regexp/regexp.go +++ b/src/regexp/regexp.go @@ -191,7 +191,7 @@ func compile(expr string, mode syntax.Flags, longest bool) (*Regexp, error) { longest: longest, }, } - if regexp.onepass == notOnePass { + if regexp.onepass == nil { regexp.prefix, regexp.prefixComplete = prog.Prefix() regexp.maxBitStateLen = maxBitStateLen(prog) } else { @@ -218,7 +218,7 @@ func (re *Regexp) get() *machine { return z } re.mu.Unlock() - z := progMachine(re.prog, re.onepass) + z := progMachine(re.prog) z.re = re return z } From a376435ae54c404a442d1387256caf09e917c550 Mon Sep 17 00:00:00 2001 From: Russ Cox Date: Tue, 2 Oct 2018 10:23:58 -0400 Subject: [PATCH 112/240] regexp: use pools for NFA machines MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Now the machine struct is only used for NFA execution. Use global pools to cache machines instead of per-Regexp lists. Also eliminate some tail calls in NFA execution, to pay for the added overhead of sync.Pool. name old time/op new time/op delta Find-12 252ns ± 0% 252ns ± 0% ~ (p=1.000 n=10+10) FindAllNoMatches-12 134ns ± 1% 136ns ± 4% ~ (p=0.443 n=9+10) FindString-12 246ns ± 0% 246ns ± 0% -0.16% (p=0.046 n=10+8) FindSubmatch-12 333ns ± 2% 332ns ± 1% ~ (p=0.489 n=10+9) FindStringSubmatch-12 320ns ± 0% 321ns ± 1% +0.55% (p=0.005 n=10+9) Literal-12 91.1ns ± 0% 91.6ns ± 0% +0.55% (p=0.000 n=10+9) NotLiteral-12 1.45µs ± 0% 1.47µs ± 0% +0.82% (p=0.000 n=10+9) MatchClass-12 2.19µs ± 0% 2.15µs ± 0% -2.01% (p=0.000 n=9+10) MatchClass_InRange-12 2.09µs ± 0% 2.09µs ± 0% ~ (p=0.082 n=10+9) ReplaceAll-12 1.39µs ± 0% 1.40µs ± 0% +0.50% (p=0.000 n=10+10) AnchoredLiteralShortNonMatch-12 82.4ns ± 0% 83.5ns ± 0% +1.36% (p=0.000 n=8+9) AnchoredLiteralLongNonMatch-12 106ns ± 1% 101ns ± 0% -4.36% (p=0.000 n=10+10) AnchoredShortMatch-12 130ns ± 0% 131ns ± 0% +0.77% (p=0.000 n=9+10) AnchoredLongMatch-12 272ns ± 0% 268ns ± 1% -1.46% (p=0.000 n=8+10) OnePassShortA-12 615ns ± 0% 614ns ± 0% ~ (p=0.094 n=10+6) NotOnePassShortA-12 549ns ± 0% 552ns ± 0% +0.52% (p=0.000 n=9+10) OnePassShortB-12 494ns ± 0% 494ns ± 0% ~ (p=0.247 n=8+9) NotOnePassShortB-12 412ns ± 1% 411ns ± 0% ~ (p=0.625 n=10+9) OnePassLongPrefix-12 108ns ± 0% 109ns ± 0% +0.93% (p=0.000 n=10+8) OnePassLongNotPrefix-12 402ns ± 0% 403ns ± 0% +0.14% (p=0.041 n=8+9) MatchParallelShared-12 38.6ns ± 2% 38.9ns ± 1% ~ (p=0.172 n=9+10) MatchParallelCopied-12 39.4ns ± 7% 39.2ns ± 1% ~ (p=0.423 n=10+10) QuoteMetaAll-12 94.9ns ± 0% 94.5ns ± 0% -0.42% (p=0.000 n=9+10) QuoteMetaNone-12 52.7ns ± 0% 52.7ns ± 0% ~ (all equal) Match/Easy0/32-12 72.1ns ± 0% 72.2ns ± 0% ~ (p=0.435 n=9+8) Match/Easy0/1K-12 298ns ± 0% 296ns ± 1% -1.01% (p=0.000 n=8+10) Match/Easy0/32K-12 4.64µs ± 1% 4.57µs ± 3% -1.39% (p=0.030 n=10+10) Match/Easy0/1M-12 234µs ± 0% 234µs ± 0% ~ (p=0.971 n=10+10) Match/Easy0/32M-12 7.95ms ± 0% 7.96ms ± 0% ~ (p=0.278 n=9+10) Match/Easy0i/32-12 1.10µs ± 0% 1.09µs ± 0% -0.29% (p=0.000 n=9+8) Match/Easy0i/1K-12 31.8µs ± 1% 31.7µs ± 0% ~ (p=0.704 n=10+9) Match/Easy0i/32K-12 1.62ms ± 1% 1.61ms ± 0% -1.12% (p=0.000 n=10+8) Match/Easy0i/1M-12 51.8ms ± 0% 51.4ms ± 0% -0.84% (p=0.000 n=8+8) Match/Easy0i/32M-12 1.65s ± 0% 1.65s ± 0% -0.46% (p=0.000 n=9+9) Match/Easy1/32-12 67.7ns ± 1% 67.6ns ± 1% ~ (p=0.723 n=10+10) Match/Easy1/1K-12 873ns ± 0% 873ns ± 2% ~ (p=0.345 n=10+9) Match/Easy1/32K-12 39.4µs ± 0% 39.7µs ± 1% +0.66% (p=0.000 n=10+10) Match/Easy1/1M-12 1.39ms ± 0% 1.41ms ± 1% +1.10% (p=0.000 n=10+10) Match/Easy1/32M-12 44.3ms ± 0% 44.9ms ± 1% +1.18% (p=0.000 n=10+10) Match/Medium/32-12 1.04µs ± 0% 1.04µs ± 0% -0.58% (p=0.000 n=9+9) Match/Medium/1K-12 31.4µs ± 0% 31.2µs ± 0% -0.62% (p=0.000 n=8+8) Match/Medium/32K-12 1.45ms ± 0% 1.45ms ± 1% ~ (p=0.356 n=9+10) Match/Medium/1M-12 46.4ms ± 0% 46.4ms ± 0% ~ (p=0.142 n=8+6) Match/Medium/32M-12 1.49s ± 1% 1.49s ± 1% ~ (p=0.739 n=10+10) Match/Hard/32-12 1.48µs ± 0% 1.47µs ± 0% -0.53% (p=0.000 n=9+9) Match/Hard/1K-12 45.0µs ± 1% 44.5µs ± 1% -1.06% (p=0.000 n=10+10) Match/Hard/32K-12 2.24ms ± 0% 2.09ms ± 0% -6.56% (p=0.000 n=8+8) Match/Hard/1M-12 71.6ms ± 0% 67.8ms ± 5% -5.36% (p=0.000 n=7+10) Match/Hard/32M-12 2.29s ± 0% 2.17s ± 5% -5.40% (p=0.000 n=9+10) Match/Hard1/32-12 7.89µs ± 0% 7.89µs ± 0% ~ (p=0.053 n=9+9) Match/Hard1/1K-12 244µs ± 0% 246µs ± 0% +0.71% (p=0.000 n=10+9) Match/Hard1/32K-12 10.3ms ± 0% 8.9ms ± 0% -13.76% (p=0.000 n=10+9) Match/Hard1/1M-12 331ms ± 0% 286ms ± 0% -13.72% (p=0.000 n=9+9) Match/Hard1/32M-12 10.6s ± 0% 9.2s ± 0% -13.72% (p=0.000 n=10+9) Match_onepass_regex/32-12 830ns ± 0% 825ns ± 0% -0.57% (p=0.000 n=9+8) Match_onepass_regex/1K-12 28.7µs ± 1% 28.7µs ± 1% -0.22% (p=0.040 n=9+9) Match_onepass_regex/32K-12 949µs ± 0% 950µs ± 1% ~ (p=0.236 n=8+9) Match_onepass_regex/1M-12 30.4ms ± 0% 30.4ms ± 0% ~ (p=0.059 n=8+9) Match_onepass_regex/32M-12 973ms ± 0% 974ms ± 1% ~ (p=0.258 n=9+9) CompileOnepass-12 4.64µs ± 0% 4.60µs ± 0% -0.90% (p=0.000 n=10+8) [Geo mean] 23.3µs 23.1µs -1.16% https://perf.golang.org/search?q=upload:20181004.3 Change-Id: I46f3d52ce89c8cd992cf554473c27af81fd81bfd Reviewed-on: https://go-review.googlesource.com/c/139781 Run-TryBot: Russ Cox TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/regexp/exec.go | 27 ++++------- src/regexp/regexp.go | 113 ++++++++++++++++++++++++++----------------- 2 files changed, 77 insertions(+), 63 deletions(-) diff --git a/src/regexp/exec.go b/src/regexp/exec.go index 23908d22d5..e1870021f2 100644 --- a/src/regexp/exec.go +++ b/src/regexp/exec.go @@ -92,20 +92,6 @@ func (i *inputs) init(r io.RuneReader, b []byte, s string) (input, int) { return i.newString(s), len(s) } -// progMachine returns a new machine running the prog p. -func progMachine(p *syntax.Prog) *machine { - m := &machine{p: p} - n := len(m.p.Inst) - m.q0 = queue{make([]uint32, n), make([]entry, 0, n)} - m.q1 = queue{make([]uint32, n), make([]entry, 0, n)} - ncap := p.NumCap - if ncap < 2 { - ncap = 2 - } - m.matchcap = make([]int, ncap) - return m -} - func (m *machine) init(ncap int) { for _, t := range m.pool { t.cap = t.cap[:ncap] @@ -274,6 +260,7 @@ func (m *machine) step(runq, nextq *queue, pos, nextPos int, c rune, nextCond sy // empty-width conditions satisfied by cond. pos gives the current position // in the input. func (m *machine) add(q *queue, pc uint32, pos int, cap []int, cond syntax.EmptyOp, t *thread) *thread { +Again: if pc == 0 { return t } @@ -296,13 +283,16 @@ func (m *machine) add(q *queue, pc uint32, pos int, cap []int, cond syntax.Empty // nothing case syntax.InstAlt, syntax.InstAltMatch: t = m.add(q, i.Out, pos, cap, cond, t) - t = m.add(q, i.Arg, pos, cap, cond, t) + pc = i.Arg + goto Again case syntax.InstEmptyWidth: if syntax.EmptyOp(i.Arg)&^cond == 0 { - t = m.add(q, i.Out, pos, cap, cond, t) + pc = i.Out + goto Again } case syntax.InstNop: - t = m.add(q, i.Out, pos, cap, cond, t) + pc = i.Out + goto Again case syntax.InstCapture: if int(i.Arg) < len(cap) { opos := cap[i.Arg] @@ -310,7 +300,8 @@ func (m *machine) add(q *queue, pc uint32, pos int, cap []int, cond syntax.Empty m.add(q, i.Out, pos, cap, cond, nil) cap[i.Arg] = opos } else { - t = m.add(q, i.Out, pos, cap, cond, t) + pc = i.Out + goto Again } case syntax.InstMatch, syntax.InstRune, syntax.InstRune1, syntax.InstRuneAny, syntax.InstRuneAnyNotNL: if t == nil { diff --git a/src/regexp/regexp.go b/src/regexp/regexp.go index 3730552c13..98146031c0 100644 --- a/src/regexp/regexp.go +++ b/src/regexp/regexp.go @@ -79,15 +79,6 @@ import ( // A Regexp is safe for concurrent use by multiple goroutines, // except for configuration methods, such as Longest. type Regexp struct { - // read-only after Compile - regexpRO - - // cache of machines for running regexp - mu sync.Mutex - machine []*machine -} - -type regexpRO struct { expr string // as passed to Compile prog *syntax.Prog // compiled program onepass *onePassProg // onepass program or nil @@ -98,9 +89,14 @@ type regexpRO struct { prefixBytes []byte // prefix, as a []byte prefixRune rune // first rune in prefix prefixEnd uint32 // pc for last rune in prefix + mpool int // pool for machines + matchcap int // size of recorded match lengths prefixComplete bool // prefix is the entire regexp cond syntax.EmptyOp // empty-width conditions required at start of match - longest bool + + // This field can be modified by the Longest method, + // but it is otherwise read-only. + longest bool // whether regexp prefers leftmost-longest match } // String returns the source text used to compile the regular expression. @@ -113,11 +109,8 @@ func (re *Regexp) String() string { // When using a Regexp in multiple goroutines, giving each goroutine // its own copy helps to avoid lock contention. func (re *Regexp) Copy() *Regexp { - // It is not safe to copy Regexp by value - // since it contains a sync.Mutex. - return &Regexp{ - regexpRO: re.regexpRO, - } + re2 := *re + return &re2 } // Compile parses a regular expression and returns, if successful, @@ -180,16 +173,19 @@ func compile(expr string, mode syntax.Flags, longest bool) (*Regexp, error) { if err != nil { return nil, err } + matchcap := prog.NumCap + if matchcap < 2 { + matchcap = 2 + } regexp := &Regexp{ - regexpRO: regexpRO{ - expr: expr, - prog: prog, - onepass: compileOnePass(prog), - numSubexp: maxCap, - subexpNames: capNames, - cond: prog.StartCond(), - longest: longest, - }, + expr: expr, + prog: prog, + onepass: compileOnePass(prog), + numSubexp: maxCap, + subexpNames: capNames, + cond: prog.StartCond(), + longest: longest, + matchcap: matchcap, } if regexp.onepass == nil { regexp.prefix, regexp.prefixComplete = prog.Prefix() @@ -203,37 +199,64 @@ func compile(expr string, mode syntax.Flags, longest bool) (*Regexp, error) { regexp.prefixBytes = []byte(regexp.prefix) regexp.prefixRune, _ = utf8.DecodeRuneInString(regexp.prefix) } + + n := len(prog.Inst) + i := 0 + for matchSize[i] != 0 && matchSize[i] < n { + i++ + } + regexp.mpool = i + return regexp, nil } +// Pools of *machine for use during (*Regexp).doExecute, +// split up by the size of the execution queues. +// matchPool[i] machines have queue size matchSize[i]. +// On a 64-bit system each queue entry is 16 bytes, +// so matchPool[0] has 16*2*128 = 4kB queues, etc. +// The final matchPool is a catch-all for very large queues. +var ( + matchSize = [...]int{128, 512, 2048, 16384, 0} + matchPool [len(matchSize)]sync.Pool +) + // get returns a machine to use for matching re. // It uses the re's machine cache if possible, to avoid // unnecessary allocation. func (re *Regexp) get() *machine { - re.mu.Lock() - if n := len(re.machine); n > 0 { - z := re.machine[n-1] - re.machine = re.machine[:n-1] - re.mu.Unlock() - return z + m, ok := matchPool[re.mpool].Get().(*machine) + if !ok { + m = new(machine) } - re.mu.Unlock() - z := progMachine(re.prog) - z.re = re - return z + m.re = re + m.p = re.prog + if cap(m.matchcap) < re.matchcap { + m.matchcap = make([]int, re.matchcap) + for _, t := range m.pool { + t.cap = make([]int, re.matchcap) + } + } + + // Allocate queues if needed. + // Or reallocate, for "large" match pool. + n := matchSize[re.mpool] + if n == 0 { // large pool + n = len(re.prog.Inst) + } + if len(m.q0.sparse) < n { + m.q0 = queue{make([]uint32, n), make([]entry, 0, n)} + m.q1 = queue{make([]uint32, n), make([]entry, 0, n)} + } + return m } -// put returns a machine to the re's machine cache. -// There is no attempt to limit the size of the cache, so it will -// grow to the maximum number of simultaneous matches -// run using re. (The cache empties when re gets garbage collected.) -func (re *Regexp) put(z *machine) { - // Remove references to input data that we no longer need. - z.inputs.clear() - - re.mu.Lock() - re.machine = append(re.machine, z) - re.mu.Unlock() +// put returns a machine to the correct machine pool. +func (re *Regexp) put(m *machine) { + m.re = nil + m.p = nil + m.inputs.clear() + matchPool[re.mpool].Put(m) } // MustCompile is like Compile but panics if the expression cannot be parsed. From 3ca1f28e5425254ec8b73fabeb45a6e49200ee08 Mon Sep 17 00:00:00 2001 From: Russ Cox Date: Thu, 4 Oct 2018 10:57:15 -0400 Subject: [PATCH 113/240] regexp: evaluate context flags lazily MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit There's no point in computing whether we're at the beginning of the line if the NFA isn't going to ask. Wait to compute that until asked. Whatever minor slowdowns were introduced by the conversion to pools that were not repaid by other optimizations are taken care of by this one. name old time/op new time/op delta Find-12 252ns ± 0% 260ns ± 0% +3.34% (p=0.000 n=10+8) FindAllNoMatches-12 136ns ± 4% 134ns ± 4% -0.96% (p=0.033 n=10+10) FindString-12 246ns ± 0% 250ns ± 0% +1.46% (p=0.000 n=8+10) FindSubmatch-12 332ns ± 1% 332ns ± 0% ~ (p=0.101 n=9+10) FindStringSubmatch-12 321ns ± 1% 322ns ± 1% ~ (p=0.717 n=9+10) Literal-12 91.6ns ± 0% 92.3ns ± 0% +0.74% (p=0.000 n=9+9) NotLiteral-12 1.47µs ± 0% 1.47µs ± 0% +0.38% (p=0.000 n=9+8) MatchClass-12 2.15µs ± 0% 2.15µs ± 0% +0.39% (p=0.000 n=10+10) MatchClass_InRange-12 2.09µs ± 0% 2.11µs ± 0% +0.75% (p=0.000 n=9+9) ReplaceAll-12 1.40µs ± 0% 1.40µs ± 0% ~ (p=0.525 n=10+10) AnchoredLiteralShortNonMatch-12 83.5ns ± 0% 81.6ns ± 0% -2.28% (p=0.000 n=9+10) AnchoredLiteralLongNonMatch-12 101ns ± 0% 97ns ± 1% -3.54% (p=0.000 n=10+10) AnchoredShortMatch-12 131ns ± 0% 128ns ± 0% -2.29% (p=0.000 n=10+9) AnchoredLongMatch-12 268ns ± 1% 252ns ± 1% -6.04% (p=0.000 n=10+10) OnePassShortA-12 614ns ± 0% 587ns ± 1% -4.33% (p=0.000 n=6+10) NotOnePassShortA-12 552ns ± 0% 547ns ± 1% -0.89% (p=0.000 n=10+10) OnePassShortB-12 494ns ± 0% 455ns ± 0% -7.96% (p=0.000 n=9+9) NotOnePassShortB-12 411ns ± 0% 406ns ± 0% -1.30% (p=0.000 n=9+9) OnePassLongPrefix-12 109ns ± 0% 108ns ± 1% ~ (p=0.064 n=8+9) OnePassLongNotPrefix-12 403ns ± 0% 349ns ± 0% -13.30% (p=0.000 n=9+8) MatchParallelShared-12 38.9ns ± 1% 37.9ns ± 1% -2.65% (p=0.000 n=10+8) MatchParallelCopied-12 39.2ns ± 1% 38.3ns ± 2% -2.20% (p=0.001 n=10+10) QuoteMetaAll-12 94.5ns ± 0% 94.7ns ± 0% +0.18% (p=0.043 n=10+9) QuoteMetaNone-12 52.7ns ± 0% 52.7ns ± 0% ~ (all equal) Match/Easy0/32-12 72.2ns ± 0% 71.9ns ± 0% -0.38% (p=0.009 n=8+10) Match/Easy0/1K-12 296ns ± 1% 297ns ± 0% +0.51% (p=0.001 n=10+9) Match/Easy0/32K-12 4.57µs ± 3% 4.61µs ± 2% ~ (p=0.280 n=10+10) Match/Easy0/1M-12 234µs ± 0% 234µs ± 0% ~ (p=0.986 n=10+10) Match/Easy0/32M-12 7.96ms ± 0% 7.98ms ± 0% +0.22% (p=0.010 n=10+9) Match/Easy0i/32-12 1.09µs ± 0% 1.10µs ± 0% +0.23% (p=0.000 n=8+9) Match/Easy0i/1K-12 31.7µs ± 0% 31.7µs ± 0% +0.09% (p=0.003 n=9+8) Match/Easy0i/32K-12 1.61ms ± 0% 1.27ms ± 1% -21.03% (p=0.000 n=8+10) Match/Easy0i/1M-12 51.4ms ± 0% 40.4ms ± 0% -21.29% (p=0.000 n=8+8) Match/Easy0i/32M-12 1.65s ± 0% 1.30s ± 1% -21.22% (p=0.000 n=9+9) Match/Easy1/32-12 67.6ns ± 1% 67.2ns ± 0% ~ (p=0.085 n=10+9) Match/Easy1/1K-12 873ns ± 2% 880ns ± 0% +0.78% (p=0.006 n=9+7) Match/Easy1/32K-12 39.7µs ± 1% 34.3µs ± 3% -13.53% (p=0.000 n=10+10) Match/Easy1/1M-12 1.41ms ± 1% 1.19ms ± 3% -15.48% (p=0.000 n=10+10) Match/Easy1/32M-12 44.9ms ± 1% 38.0ms ± 2% -15.21% (p=0.000 n=10+10) Match/Medium/32-12 1.04µs ± 0% 1.03µs ± 0% -0.57% (p=0.000 n=9+9) Match/Medium/1K-12 31.2µs ± 0% 31.4µs ± 1% +0.61% (p=0.000 n=8+10) Match/Medium/32K-12 1.45ms ± 1% 1.20ms ± 0% -17.70% (p=0.000 n=10+8) Match/Medium/1M-12 46.4ms ± 0% 38.4ms ± 2% -17.32% (p=0.000 n=6+9) Match/Medium/32M-12 1.49s ± 1% 1.24s ± 1% -16.81% (p=0.000 n=10+10) Match/Hard/32-12 1.47µs ± 0% 1.47µs ± 0% -0.31% (p=0.000 n=9+10) Match/Hard/1K-12 44.5µs ± 1% 44.4µs ± 0% ~ (p=0.075 n=10+10) Match/Hard/32K-12 2.09ms ± 0% 1.78ms ± 7% -14.88% (p=0.000 n=8+10) Match/Hard/1M-12 67.8ms ± 5% 56.9ms ± 7% -16.05% (p=0.000 n=10+10) Match/Hard/32M-12 2.17s ± 5% 1.84s ± 6% -15.21% (p=0.000 n=10+10) Match/Hard1/32-12 7.89µs ± 0% 7.94µs ± 0% +0.61% (p=0.000 n=9+9) Match/Hard1/1K-12 246µs ± 0% 245µs ± 0% -0.30% (p=0.010 n=9+10) Match/Hard1/32K-12 8.93ms ± 0% 8.17ms ± 0% -8.44% (p=0.000 n=9+8) Match/Hard1/1M-12 286ms ± 0% 269ms ± 9% -5.66% (p=0.028 n=9+10) Match/Hard1/32M-12 9.16s ± 0% 8.61s ± 8% -5.98% (p=0.028 n=9+10) Match_onepass_regex/32-12 825ns ± 0% 712ns ± 0% -13.75% (p=0.000 n=8+8) Match_onepass_regex/1K-12 28.7µs ± 1% 19.8µs ± 0% -30.99% (p=0.000 n=9+8) Match_onepass_regex/32K-12 950µs ± 1% 628µs ± 0% -33.83% (p=0.000 n=9+8) Match_onepass_regex/1M-12 30.4ms ± 0% 20.1ms ± 0% -33.74% (p=0.000 n=9+8) Match_onepass_regex/32M-12 974ms ± 1% 646ms ± 0% -33.73% (p=0.000 n=9+8) CompileOnepass-12 4.60µs ± 0% 4.59µs ± 0% ~ (p=0.063 n=8+9) [Geo mean] 23.1µs 21.3µs -7.44% https://perf.golang.org/search?q=upload:20181004.4 Change-Id: I47cdd09f6dcde1d7c317080e9b4df42c7d0a8d24 Reviewed-on: https://go-review.googlesource.com/c/139782 Run-TryBot: Russ Cox TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/regexp/backtrack.go | 3 +- src/regexp/exec.go | 81 ++++++++++++++++++++++++++++++++++------- src/regexp/regexp.go | 14 +++---- 3 files changed, 77 insertions(+), 21 deletions(-) diff --git a/src/regexp/backtrack.go b/src/regexp/backtrack.go index 239abc3a57..9fb7d1e493 100644 --- a/src/regexp/backtrack.go +++ b/src/regexp/backtrack.go @@ -257,7 +257,8 @@ func (re *Regexp) tryBacktrack(b *bitState, i input, pc uint32, pos int) bool { } case syntax.InstEmptyWidth: - if syntax.EmptyOp(inst.Arg)&^i.context(pos) != 0 { + flag := i.context(pos) + if !flag.match(syntax.EmptyOp(inst.Arg)) { continue } pc = inst.Out diff --git a/src/regexp/exec.go b/src/regexp/exec.go index e1870021f2..efe764e2dc 100644 --- a/src/regexp/exec.go +++ b/src/regexp/exec.go @@ -114,6 +114,61 @@ func (m *machine) alloc(i *syntax.Inst) *thread { return t } +// A lazyFlag is a lazily-evaluated syntax.EmptyOp, +// for checking zero-width flags like ^ $ \A \z \B \b. +// It records the pair of relevant runes and does not +// determine the implied flags until absolutely necessary +// (most of the time, that means never). +type lazyFlag uint64 + +func newLazyFlag(r1, r2 rune) lazyFlag { + return lazyFlag(uint64(r1)<<32 | uint64(uint32(r2))) +} + +func (f lazyFlag) match(op syntax.EmptyOp) bool { + if op == 0 { + return true + } + r1 := rune(f >> 32) + if op&syntax.EmptyBeginLine != 0 { + if r1 != '\n' && r1 >= 0 { + return false + } + op &^= syntax.EmptyBeginLine + } + if op&syntax.EmptyBeginText != 0 { + if r1 >= 0 { + return false + } + op &^= syntax.EmptyBeginText + } + if op == 0 { + return true + } + r2 := rune(f) + if op&syntax.EmptyEndLine != 0 { + if r2 != '\n' && r2 >= 0 { + return false + } + op &^= syntax.EmptyEndLine + } + if op&syntax.EmptyEndText != 0 { + if r2 >= 0 { + return false + } + op &^= syntax.EmptyEndText + } + if op == 0 { + return true + } + if syntax.IsWordChar(r1) != syntax.IsWordChar(r2) { + op &^= syntax.EmptyWordBoundary + } else { + op &^= syntax.EmptyNoWordBoundary + } + return op == 0 +} + // match runs the machine over the input starting at pos. // It reports whether a match was found. // If so, m.matchcap holds the submatch information. @@ -133,9 +188,9 @@ func (m *machine) match(i input, pos int) bool { if r != endOfText { r1, width1 = i.step(pos + width) } - var flag syntax.EmptyOp + var flag lazyFlag if pos == 0 { - flag = syntax.EmptyOpContext(-1, r) + flag = newLazyFlag(-1, r) } else { flag = i.context(pos) } @@ -164,10 +219,10 @@ func (m *machine) match(i input, pos int) bool { if len(m.matchcap) > 0 { m.matchcap[0] = pos } - m.add(runq, uint32(m.p.Start), pos, m.matchcap, flag, nil) + m.add(runq, uint32(m.p.Start), pos, m.matchcap, &flag, nil) } - flag = syntax.EmptyOpContext(r, r1) - m.step(runq, nextq, pos, pos+width, r, flag) + flag = newLazyFlag(r, r1) + m.step(runq, nextq, pos, pos+width, r, &flag) if width == 0 { break } @@ -202,7 +257,7 @@ func (m *machine) clear(q *queue) { // The step processes the rune c (which may be endOfText), // which starts at position pos and ends at nextPos. // nextCond gives the setting for the empty-width flags after c. -func (m *machine) step(runq, nextq *queue, pos, nextPos int, c rune, nextCond syntax.EmptyOp) { +func (m *machine) step(runq, nextq *queue, pos, nextPos int, c rune, nextCond *lazyFlag) { longest := m.re.longest for j := 0; j < len(runq.dense); j++ { d := &runq.dense[j] @@ -259,7 +314,7 @@ func (m *machine) step(runq, nextq *queue, pos, nextPos int, c rune, nextCond sy // It also recursively adds an entry for all instructions reachable from pc by following // empty-width conditions satisfied by cond. pos gives the current position // in the input. -func (m *machine) add(q *queue, pc uint32, pos int, cap []int, cond syntax.EmptyOp, t *thread) *thread { +func (m *machine) add(q *queue, pc uint32, pos int, cap []int, cond *lazyFlag, t *thread) *thread { Again: if pc == 0 { return t @@ -286,7 +341,7 @@ Again: pc = i.Arg goto Again case syntax.InstEmptyWidth: - if syntax.EmptyOp(i.Arg)&^cond == 0 { + if cond.match(syntax.EmptyOp(i.Arg)) { pc = i.Out goto Again } @@ -365,16 +420,16 @@ func (re *Regexp) doOnePass(ir io.RuneReader, ib []byte, is string, pos, ncap in if r != endOfText { r1, width1 = i.step(pos + width) } - var flag syntax.EmptyOp + var flag lazyFlag if pos == 0 { - flag = syntax.EmptyOpContext(-1, r) + flag = newLazyFlag(-1, r) } else { flag = i.context(pos) } pc := re.onepass.Start inst := re.onepass.Inst[pc] // If there is a simple literal prefix, skip over it. - if pos == 0 && syntax.EmptyOp(inst.Arg)&^flag == 0 && + if pos == 0 && flag.match(syntax.EmptyOp(inst.Arg)) && len(re.prefix) > 0 && i.canCheckPrefix() { // Match requires literal prefix; fast search for it. if !i.hasPrefix(re) { @@ -422,7 +477,7 @@ func (re *Regexp) doOnePass(ir io.RuneReader, ib []byte, is string, pos, ncap in case syntax.InstNop: continue case syntax.InstEmptyWidth: - if syntax.EmptyOp(inst.Arg)&^flag != 0 { + if !flag.match(syntax.EmptyOp(inst.Arg)) { goto Return } continue @@ -435,7 +490,7 @@ func (re *Regexp) doOnePass(ir io.RuneReader, ib []byte, is string, pos, ncap in if width == 0 { break } - flag = syntax.EmptyOpContext(r, r1) + flag = newLazyFlag(r, r1) pos += width r, width = r1, width1 if r != endOfText { diff --git a/src/regexp/regexp.go b/src/regexp/regexp.go index 98146031c0..3586029555 100644 --- a/src/regexp/regexp.go +++ b/src/regexp/regexp.go @@ -311,7 +311,7 @@ type input interface { canCheckPrefix() bool // can we look ahead without losing info? hasPrefix(re *Regexp) bool index(re *Regexp, pos int) int - context(pos int) syntax.EmptyOp + context(pos int) lazyFlag } // inputString scans a string. @@ -342,7 +342,7 @@ func (i *inputString) index(re *Regexp, pos int) int { return strings.Index(i.str[pos:], re.prefix) } -func (i *inputString) context(pos int) syntax.EmptyOp { +func (i *inputString) context(pos int) lazyFlag { r1, r2 := endOfText, endOfText // 0 < pos && pos <= len(i.str) if uint(pos-1) < uint(len(i.str)) { @@ -358,7 +358,7 @@ func (i *inputString) context(pos int) syntax.EmptyOp { r2, _ = utf8.DecodeRuneInString(i.str[pos:]) } } - return syntax.EmptyOpContext(r1, r2) + return newLazyFlag(r1, r2) } // inputBytes scans a byte slice. @@ -389,7 +389,7 @@ func (i *inputBytes) index(re *Regexp, pos int) int { return bytes.Index(i.str[pos:], re.prefixBytes) } -func (i *inputBytes) context(pos int) syntax.EmptyOp { +func (i *inputBytes) context(pos int) lazyFlag { r1, r2 := endOfText, endOfText // 0 < pos && pos <= len(i.str) if uint(pos-1) < uint(len(i.str)) { @@ -405,7 +405,7 @@ func (i *inputBytes) context(pos int) syntax.EmptyOp { r2, _ = utf8.DecodeRune(i.str[pos:]) } } - return syntax.EmptyOpContext(r1, r2) + return newLazyFlag(r1, r2) } // inputReader scans a RuneReader. @@ -441,8 +441,8 @@ func (i *inputReader) index(re *Regexp, pos int) int { return -1 } -func (i *inputReader) context(pos int) syntax.EmptyOp { - return 0 +func (i *inputReader) context(pos int) lazyFlag { + return 0 // not used } // LiteralPrefix returns a literal string that must begin any match From 5160e0d18cace12a40c9c271bc0072915f3f9295 Mon Sep 17 00:00:00 2001 From: Russ Cox Date: Fri, 28 Sep 2018 13:19:27 -0400 Subject: [PATCH 114/240] regexp: add DeepEqual test MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This locks in behavior we accidentally broke and then restored during the Go 1.11 cycle. See #26219. It also locks in new behavior that DeepEqual always works, instead of only usually working. This CL is the final piece of a series of CLs to make DeepEqual always work, by eliminating the machine cache and making other related optimizations. Overall, this whole sequence of CLs achieves: name old time/op new time/op delta Find-12 264ns ± 3% 260ns ± 0% -1.59% (p=0.000 n=10+9) FindAllNoMatches-12 140ns ± 2% 133ns ± 0% -5.34% (p=0.000 n=10+7) FindString-12 256ns ± 0% 249ns ± 0% -2.73% (p=0.000 n=8+8) FindSubmatch-12 339ns ± 1% 333ns ± 1% -1.73% (p=0.000 n=9+10) FindStringSubmatch-12 322ns ± 0% 322ns ± 1% ~ (p=0.450 n=8+10) Literal-12 100ns ± 2% 92ns ± 0% -8.13% (p=0.000 n=10+10) NotLiteral-12 1.50µs ± 0% 1.47µs ± 0% -1.65% (p=0.000 n=8+8) MatchClass-12 2.18µs ± 0% 2.15µs ± 0% -1.05% (p=0.000 n=10+9) MatchClass_InRange-12 2.12µs ± 0% 2.11µs ± 0% -0.65% (p=0.000 n=10+9) ReplaceAll-12 1.41µs ± 0% 1.41µs ± 0% ~ (p=0.254 n=7+10) AnchoredLiteralShortNonMatch-12 89.8ns ± 0% 81.5ns ± 0% -9.22% (p=0.000 n=8+9) AnchoredLiteralLongNonMatch-12 105ns ± 3% 97ns ± 0% -7.21% (p=0.000 n=10+10) AnchoredShortMatch-12 141ns ± 0% 128ns ± 0% -9.22% (p=0.000 n=9+9) AnchoredLongMatch-12 276ns ± 4% 253ns ± 2% -8.23% (p=0.000 n=10+10) OnePassShortA-12 620ns ± 0% 587ns ± 0% -5.26% (p=0.000 n=10+6) NotOnePassShortA-12 575ns ± 3% 547ns ± 1% -4.77% (p=0.000 n=10+10) OnePassShortB-12 493ns ± 0% 455ns ± 0% -7.62% (p=0.000 n=8+9) NotOnePassShortB-12 423ns ± 0% 406ns ± 1% -3.95% (p=0.000 n=8+10) OnePassLongPrefix-12 112ns ± 0% 109ns ± 1% -2.77% (p=0.000 n=9+10) OnePassLongNotPrefix-12 405ns ± 0% 349ns ± 0% -13.74% (p=0.000 n=8+9) MatchParallelShared-12 501ns ± 1% 38ns ± 2% -92.42% (p=0.000 n=10+10) MatchParallelCopied-12 39.1ns ± 0% 38.6ns ± 1% -1.38% (p=0.002 n=6+10) QuoteMetaAll-12 94.6ns ± 0% 94.8ns ± 0% +0.26% (p=0.001 n=10+9) QuoteMetaNone-12 52.7ns ± 0% 52.7ns ± 0% ~ (all equal) Match/Easy0/32-12 79.1ns ± 0% 72.0ns ± 0% -8.95% (p=0.000 n=9+9) Match/Easy0/1K-12 307ns ± 1% 297ns ± 0% -3.32% (p=0.000 n=10+7) Match/Easy0/32K-12 4.65µs ± 2% 4.67µs ± 1% ~ (p=0.633 n=10+8) Match/Easy0/1M-12 234µs ± 0% 234µs ± 0% ~ (p=0.684 n=10+10) Match/Easy0/32M-12 7.98ms ± 1% 7.96ms ± 0% -0.31% (p=0.014 n=9+9) Match/Easy0i/32-12 1.13µs ± 1% 1.10µs ± 0% -3.18% (p=0.000 n=9+10) Match/Easy0i/1K-12 32.5µs ± 0% 31.7µs ± 0% -2.61% (p=0.000 n=9+9) Match/Easy0i/32K-12 1.59ms ± 0% 1.26ms ± 0% -20.71% (p=0.000 n=9+7) Match/Easy0i/1M-12 51.0ms ± 0% 40.4ms ± 0% -20.68% (p=0.000 n=10+7) Match/Easy0i/32M-12 1.63s ± 0% 1.30s ± 0% -20.62% (p=0.001 n=7+7) Match/Easy1/32-12 75.1ns ± 1% 67.4ns ± 0% -10.24% (p=0.000 n=8+10) Match/Easy1/1K-12 861ns ± 0% 879ns ± 0% +2.18% (p=0.000 n=8+8) Match/Easy1/32K-12 39.2µs ± 1% 34.1µs ± 0% -13.01% (p=0.000 n=10+8) Match/Easy1/1M-12 1.38ms ± 0% 1.17ms ± 0% -15.06% (p=0.000 n=10+8) Match/Easy1/32M-12 44.2ms ± 1% 37.5ms ± 0% -15.15% (p=0.000 n=10+9) Match/Medium/32-12 1.04µs ± 1% 1.03µs ± 0% -0.64% (p=0.002 n=9+8) Match/Medium/1K-12 31.3µs ± 0% 31.2µs ± 0% -0.36% (p=0.000 n=9+9) Match/Medium/32K-12 1.44ms ± 0% 1.20ms ± 0% -17.02% (p=0.000 n=8+7) Match/Medium/1M-12 46.1ms ± 0% 38.2ms ± 0% -17.14% (p=0.001 n=6+8) Match/Medium/32M-12 1.48s ± 0% 1.23s ± 0% -17.10% (p=0.000 n=9+7) Match/Hard/32-12 1.54µs ± 1% 1.47µs ± 0% -4.64% (p=0.000 n=9+10) Match/Hard/1K-12 46.4µs ± 1% 44.4µs ± 0% -4.35% (p=0.000 n=9+8) Match/Hard/32K-12 2.19ms ± 0% 1.78ms ± 7% -18.74% (p=0.000 n=8+10) Match/Hard/1M-12 70.1ms ± 0% 57.7ms ± 7% -17.62% (p=0.000 n=8+10) Match/Hard/32M-12 2.24s ± 0% 1.84s ± 8% -17.92% (p=0.000 n=8+10) Match/Hard1/32-12 8.17µs ± 1% 7.95µs ± 0% -2.72% (p=0.000 n=8+10) Match/Hard1/1K-12 254µs ± 2% 245µs ± 0% -3.62% (p=0.000 n=9+10) Match/Hard1/32K-12 9.58ms ± 1% 8.54ms ± 7% -10.87% (p=0.000 n=10+10) Match/Hard1/1M-12 306ms ± 1% 271ms ± 8% -11.42% (p=0.000 n=9+10) Match/Hard1/32M-12 9.79s ± 1% 8.58s ± 9% -12.37% (p=0.000 n=9+10) Match_onepass_regex/32-12 808ns ± 0% 716ns ± 1% -11.39% (p=0.000 n=8+9) Match_onepass_regex/1K-12 27.8µs ± 0% 19.9µs ± 2% -28.51% (p=0.000 n=8+9) Match_onepass_regex/32K-12 925µs ± 0% 631µs ± 2% -31.71% (p=0.000 n=9+9) Match_onepass_regex/1M-12 29.5ms ± 0% 20.2ms ± 2% -31.53% (p=0.000 n=10+9) Match_onepass_regex/32M-12 945ms ± 0% 648ms ± 2% -31.39% (p=0.000 n=9+9) CompileOnepass-12 4.67µs ± 0% 4.60µs ± 0% -1.48% (p=0.000 n=10+10) [Geo mean] 24.5µs 21.4µs -12.94% https://perf.golang.org/search?q=upload:20181004.5 Change-Id: Icb17b306830dc5489efbb55900937b94ce0eb047 Reviewed-on: https://go-review.googlesource.com/c/139783 Run-TryBot: Russ Cox TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/regexp/all_test.go | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/src/regexp/all_test.go b/src/regexp/all_test.go index 8cbc2962cb..623f82df72 100644 --- a/src/regexp/all_test.go +++ b/src/regexp/all_test.go @@ -859,3 +859,26 @@ func BenchmarkQuoteMetaNone(b *testing.B) { sink = QuoteMeta(s) } } + +func TestDeepEqual(t *testing.T) { + re1 := MustCompile("a.*b.*c.*d") + re2 := MustCompile("a.*b.*c.*d") + if !reflect.DeepEqual(re1, re2) { // has always been true, since Go 1. + t.Errorf("DeepEqual(re1, re2) = false, want true") + } + + re1.MatchString("abcdefghijklmn") + if !reflect.DeepEqual(re1, re2) { + t.Errorf("DeepEqual(re1, re2) = false, want true") + } + + re2.MatchString("abcdefghijklmn") + if !reflect.DeepEqual(re1, re2) { + t.Errorf("DeepEqual(re1, re2) = false, want true") + } + + re2.MatchString(strings.Repeat("abcdefghijklmn", 100)) + if !reflect.DeepEqual(re1, re2) { + t.Errorf("DeepEqual(re1, re2) = false, want true") + } +} From bf68744a122b83f44cc454417d5723be04215091 Mon Sep 17 00:00:00 2001 From: Russ Cox Date: Fri, 28 Sep 2018 15:17:24 -0400 Subject: [PATCH 115/240] regexp: add partial Deprecation comment to Copy Change-Id: I21b7817e604a48330f1ee250f7b1b2adc1f16067 Reviewed-on: https://go-review.googlesource.com/c/139784 Run-TryBot: Russ Cox TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/regexp/regexp.go | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/src/regexp/regexp.go b/src/regexp/regexp.go index 3586029555..38b3c86d9f 100644 --- a/src/regexp/regexp.go +++ b/src/regexp/regexp.go @@ -105,9 +105,13 @@ func (re *Regexp) String() string { } // Copy returns a new Regexp object copied from re. +// Calling Longest on one copy does not affect another. // -// When using a Regexp in multiple goroutines, giving each goroutine -// its own copy helps to avoid lock contention. +// Deprecated: In earlier releases, when using a Regexp in multiple goroutines, +// giving each goroutine its own copy helped to avoid lock contention. +// As of Go 1.12, using Copy is no longer necessary to avoid lock contention. +// Copy may still be appropriate if the reason for its use is to make +// two copies with different Longest settings. func (re *Regexp) Copy() *Regexp { re2 := *re return &re2 From 57456527560c63a5baef8b7e99eab5508ca58e63 Mon Sep 17 00:00:00 2001 From: Mak Kolybabi Date: Fri, 12 Oct 2018 21:43:48 +0000 Subject: [PATCH 116/240] doc: fix spelling of `comp[]hensive` to `comp[r]ehensive` Change-Id: Idd93e45fab30e7496105b84fc2fce1884711b580 GitHub-Last-Rev: 43aa04e876655e31fc1c4b2b5ae0702472e49102 GitHub-Pull-Request: golang/go#27983 Reviewed-on: https://go-review.googlesource.com/c/141645 Reviewed-by: Ian Lance Taylor --- doc/editors.html | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/doc/editors.html b/doc/editors.html index 6f787864c6..4ff35a58fc 100644 --- a/doc/editors.html +++ b/doc/editors.html @@ -28,7 +28,7 @@ or as a plugin for IntelliJ IDEA Ultimate

    -Note that these are only a few top solutions; a more comphensive +Note that these are only a few top solutions; a more comprehensive community-maintained list of IDEs and text editor plugins is available at the Wiki. From b4150f76144808bf0015fe23be0e2ade32a14599 Mon Sep 17 00:00:00 2001 From: Matthew Dempsky Date: Fri, 12 Oct 2018 14:55:17 -0700 Subject: [PATCH 117/240] cmd/compile: remove ineffectual -i flag This flag lost its usefulness in CL 34273. Change-Id: I033c29f105937139b4e359a340906be439f1ed07 Reviewed-on: https://go-review.googlesource.com/c/141646 Run-TryBot: Matthew Dempsky Reviewed-by: Robert Griesemer --- src/cmd/compile/internal/gc/main.go | 1 - 1 file changed, 1 deletion(-) diff --git a/src/cmd/compile/internal/gc/main.go b/src/cmd/compile/internal/gc/main.go index 68f6294724..02aec32685 100644 --- a/src/cmd/compile/internal/gc/main.go +++ b/src/cmd/compile/internal/gc/main.go @@ -207,7 +207,6 @@ func Main(archInit func(*Arch)) { objabi.Flagcount("e", "no limit on number of errors reported", &Debug['e']) objabi.Flagcount("f", "debug stack frames", &Debug['f']) objabi.Flagcount("h", "halt on error", &Debug['h']) - objabi.Flagcount("i", "debug line number stack", &Debug['i']) objabi.Flagfn1("importmap", "add `definition` of the form source=actual to import map", addImportMap) objabi.Flagfn1("importcfg", "read import configuration from `file`", readImportCfg) flag.StringVar(&flag_installsuffix, "installsuffix", "", "set pkg directory `suffix`") From c4f07510a0161c4493a751984e24532a1b189759 Mon Sep 17 00:00:00 2001 From: Ivan Sharavuev Date: Sat, 13 Oct 2018 13:14:39 +0300 Subject: [PATCH 118/240] strings: Replace s[:] to s where s is a slice. Change-Id: Ie7ba3f9ece9b0fc0e8a5c92fbae9c3b558815e4c Reviewed-on: https://go-review.googlesource.com/c/141997 Run-TryBot: Iskander Sharipov TryBot-Result: Gobot Gobot Reviewed-by: Iskander Sharipov --- src/strings/replace.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/strings/replace.go b/src/strings/replace.go index 9ddf5e1e3f..ace0b8d646 100644 --- a/src/strings/replace.go +++ b/src/strings/replace.go @@ -459,7 +459,7 @@ func (r *byteReplacer) WriteString(w io.Writer, s string) (n int, err error) { buf := make([]byte, bufsize) for len(s) > 0 { - ncopy := copy(buf, s[:]) + ncopy := copy(buf, s) s = s[ncopy:] for i, b := range buf[:ncopy] { buf[i] = r[b] From e489a236b40febae0c2df0462ae8dd6cffdd3646 Mon Sep 17 00:00:00 2001 From: avsharapov Date: Sat, 13 Oct 2018 13:31:39 +0300 Subject: [PATCH 119/240] jpeg: simplify 'x = x op ...' to 'x op= ...' Change-Id: Id431969e42f0d9bd28bbf163d10378a6de2416f2 Reviewed-on: https://go-review.googlesource.com/c/141999 Run-TryBot: Iskander Sharipov TryBot-Result: Gobot Gobot Reviewed-by: Iskander Sharipov --- src/image/jpeg/fdct.go | 32 ++++++++++++++++---------------- 1 file changed, 16 insertions(+), 16 deletions(-) diff --git a/src/image/jpeg/fdct.go b/src/image/jpeg/fdct.go index 3f8be4e326..201a5abd0b 100644 --- a/src/image/jpeg/fdct.go +++ b/src/image/jpeg/fdct.go @@ -123,14 +123,14 @@ func fdct(b *block) { tmp13 = tmp1 + tmp3 z1 = (tmp12 + tmp13) * fix_1_175875602 z1 += 1 << (constBits - pass1Bits - 1) - tmp0 = tmp0 * fix_1_501321110 - tmp1 = tmp1 * fix_3_072711026 - tmp2 = tmp2 * fix_2_053119869 - tmp3 = tmp3 * fix_0_298631336 - tmp10 = tmp10 * -fix_0_899976223 - tmp11 = tmp11 * -fix_2_562915447 - tmp12 = tmp12 * -fix_0_390180644 - tmp13 = tmp13 * -fix_1_961570560 + tmp0 *= fix_1_501321110 + tmp1 *= fix_3_072711026 + tmp2 *= fix_2_053119869 + tmp3 *= fix_0_298631336 + tmp10 *= -fix_0_899976223 + tmp11 *= -fix_2_562915447 + tmp12 *= -fix_0_390180644 + tmp13 *= -fix_1_961570560 tmp12 += z1 tmp13 += z1 @@ -171,14 +171,14 @@ func fdct(b *block) { tmp13 = tmp1 + tmp3 z1 = (tmp12 + tmp13) * fix_1_175875602 z1 += 1 << (constBits + pass1Bits - 1) - tmp0 = tmp0 * fix_1_501321110 - tmp1 = tmp1 * fix_3_072711026 - tmp2 = tmp2 * fix_2_053119869 - tmp3 = tmp3 * fix_0_298631336 - tmp10 = tmp10 * -fix_0_899976223 - tmp11 = tmp11 * -fix_2_562915447 - tmp12 = tmp12 * -fix_0_390180644 - tmp13 = tmp13 * -fix_1_961570560 + tmp0 *= fix_1_501321110 + tmp1 *= fix_3_072711026 + tmp2 *= fix_2_053119869 + tmp3 *= fix_0_298631336 + tmp10 *= -fix_0_899976223 + tmp11 *= -fix_2_562915447 + tmp12 *= -fix_0_390180644 + tmp13 *= -fix_1_961570560 tmp12 += z1 tmp13 += z1 From 4330866385c2edfd56a0a3c6136db1d034e4712a Mon Sep 17 00:00:00 2001 From: OlgaVlPetrova Date: Sat, 13 Oct 2018 14:06:30 +0300 Subject: [PATCH 120/240] debug/plan9obj: simplify s[:] to s where Change-Id: Ib2eee1215ba046e4541af8afa3a921c680d2b37e Reviewed-on: https://go-review.googlesource.com/c/142037 Run-TryBot: Iskander Sharipov TryBot-Result: Gobot Gobot Reviewed-by: Iskander Sharipov --- src/debug/plan9obj/file.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/debug/plan9obj/file.go b/src/debug/plan9obj/file.go index c78e35d000..314608da61 100644 --- a/src/debug/plan9obj/file.go +++ b/src/debug/plan9obj/file.go @@ -274,7 +274,7 @@ func newTable(symtab []byte, ptrsz int) ([]Sym, error) { ts.Value = s.value switch s.typ { default: - ts.Name = string(s.name[:]) + ts.Name = string(s.name) case 'z', 'Z': for i := 0; i < len(s.name); i += 2 { eltIdx := binary.BigEndian.Uint16(s.name[i : i+2]) From df459d5e6cc14532961875058f5d4ba3d04b5ed4 Mon Sep 17 00:00:00 2001 From: Keith Randall Date: Sat, 13 Oct 2018 15:48:17 -0700 Subject: [PATCH 121/240] cmd/compile: emit symbol for constant string before parallel compiler phase This CL makes sure we walk the newly generated assignment. Part of that walk makes sure that all symbols for strings are emitted before we start referencing them during the parallel compilation phase. Without this change, those references during the parallel phase do a create-if-not-exist, which leads to a data race. I'm not 100% sure this is the fix for the issues below, but optimistically assuming it is... Fixes #28170 Fixes #28159 Change-Id: Ic63d5160ad9be5cb23fa6bbb2183e4848776c0ff Reviewed-on: https://go-review.googlesource.com/c/141648 Run-TryBot: Keith Randall Reviewed-by: Josh Bleecher Snyder TryBot-Result: Gobot Gobot --- src/cmd/compile/internal/gc/walk.go | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/cmd/compile/internal/gc/walk.go b/src/cmd/compile/internal/gc/walk.go index 6b9ec51203..d33674f221 100644 --- a/src/cmd/compile/internal/gc/walk.go +++ b/src/cmd/compile/internal/gc/walk.go @@ -1460,7 +1460,9 @@ opswitch: as := nod(OAS, nod(OIND, p, nil), nod(OIND, convnop(nod(OSPTR, s, nil), t.PtrTo()), nil)) - init.Append(typecheck(as, Etop)) + as = typecheck(as, Etop) + as = walkstmt(as) + init.Append(as) } // Slice the [n]byte to a []byte. From 653a4bd8d46a8a329f37e8a9fc909c3bb92b02bc Mon Sep 17 00:00:00 2001 From: Keith Randall Date: Tue, 9 Oct 2018 22:55:36 -0700 Subject: [PATCH 122/240] cmd/compile: optimize loads from readonly globals into constants Instead of MOVB go.string."foo"(SB), AX do MOVB $102, AX When we know the global we're loading from is readonly, we can do that read at compile time. I've made this arch-dependent mostly because the cases where this happens often are memory->memory moves, and those don't get decomposed until lowering. Did amd64/386/arm/arm64. Other architectures could follow. Update #26498 Change-Id: I41b1dc831b2cd0a52dac9b97f4f4457888a46389 Reviewed-on: https://go-review.googlesource.com/c/141118 Run-TryBot: Keith Randall TryBot-Result: Gobot Gobot Reviewed-by: Josh Bleecher Snyder --- src/cmd/compile/internal/ssa/gen/386.rules | 4 + src/cmd/compile/internal/ssa/gen/AMD64.rules | 11 +- src/cmd/compile/internal/ssa/gen/ARM.rules | 4 + src/cmd/compile/internal/ssa/gen/ARM64.rules | 5 + src/cmd/compile/internal/ssa/rewrite.go | 44 ++++ src/cmd/compile/internal/ssa/rewrite386.go | 54 +++++ src/cmd/compile/internal/ssa/rewriteAMD64.go | 215 ++++++++++++++++--- src/cmd/compile/internal/ssa/rewriteARM.go | 54 +++++ src/cmd/compile/internal/ssa/rewriteARM64.go | 72 +++++++ test/codegen/strings.go | 27 +++ 10 files changed, 459 insertions(+), 31 deletions(-) diff --git a/src/cmd/compile/internal/ssa/gen/386.rules b/src/cmd/compile/internal/ssa/gen/386.rules index 0df8911f39..7a6797bb09 100644 --- a/src/cmd/compile/internal/ssa/gen/386.rules +++ b/src/cmd/compile/internal/ssa/gen/386.rules @@ -1206,3 +1206,7 @@ (CMPLload {sym} [off] ptr (MOVLconst [c]) mem) && validValAndOff(int64(int32(c)),off) -> (CMPLconstload {sym} [makeValAndOff(int64(int32(c)),off)] ptr mem) (CMPWload {sym} [off] ptr (MOVLconst [c]) mem) && validValAndOff(int64(int16(c)),off) -> (CMPWconstload {sym} [makeValAndOff(int64(int16(c)),off)] ptr mem) (CMPBload {sym} [off] ptr (MOVLconst [c]) mem) && validValAndOff(int64(int8(c)),off) -> (CMPBconstload {sym} [makeValAndOff(int64(int8(c)),off)] ptr mem) + +(MOVBload [off] {sym} (SB) _) && symIsRO(sym) -> (MOVLconst [int64(read8(sym, off))]) +(MOVWload [off] {sym} (SB) _) && symIsRO(sym) -> (MOVLconst [int64(read16(sym, off, config.BigEndian))]) +(MOVLload [off] {sym} (SB) _) && symIsRO(sym) -> (MOVLconst [int64(int32(read32(sym, off, config.BigEndian)))]) diff --git a/src/cmd/compile/internal/ssa/gen/AMD64.rules b/src/cmd/compile/internal/ssa/gen/AMD64.rules index f9ac5e4dce..fa7f1438d6 100644 --- a/src/cmd/compile/internal/ssa/gen/AMD64.rules +++ b/src/cmd/compile/internal/ssa/gen/AMD64.rules @@ -1073,11 +1073,11 @@ // Fold constants into stores. (MOVQstore [off] {sym} ptr (MOVQconst [c]) mem) && validValAndOff(c,off) -> (MOVQstoreconst [makeValAndOff(c,off)] {sym} ptr mem) -(MOVLstore [off] {sym} ptr (MOVLconst [c]) mem) && validOff(off) -> +(MOVLstore [off] {sym} ptr (MOV(L|Q)const [c]) mem) && validOff(off) -> (MOVLstoreconst [makeValAndOff(int64(int32(c)),off)] {sym} ptr mem) -(MOVWstore [off] {sym} ptr (MOVLconst [c]) mem) && validOff(off) -> +(MOVWstore [off] {sym} ptr (MOV(L|Q)const [c]) mem) && validOff(off) -> (MOVWstoreconst [makeValAndOff(int64(int16(c)),off)] {sym} ptr mem) -(MOVBstore [off] {sym} ptr (MOVLconst [c]) mem) && validOff(off) -> +(MOVBstore [off] {sym} ptr (MOV(L|Q)const [c]) mem) && validOff(off) -> (MOVBstoreconst [makeValAndOff(int64(int8(c)),off)] {sym} ptr mem) // Fold address offsets into constant stores. @@ -2487,3 +2487,8 @@ && validValAndOff(0,off) && clobber(l) -> @l.Block (CMP(Q|L|W|B)constload {sym} [makeValAndOff(0,off)] ptr mem) + +(MOVBload [off] {sym} (SB) _) && symIsRO(sym) -> (MOVLconst [int64(read8(sym, off))]) +(MOVWload [off] {sym} (SB) _) && symIsRO(sym) -> (MOVLconst [int64(read16(sym, off, config.BigEndian))]) +(MOVLload [off] {sym} (SB) _) && symIsRO(sym) -> (MOVQconst [int64(read32(sym, off, config.BigEndian))]) +(MOVQload [off] {sym} (SB) _) && symIsRO(sym) -> (MOVQconst [int64(read64(sym, off, config.BigEndian))]) diff --git a/src/cmd/compile/internal/ssa/gen/ARM.rules b/src/cmd/compile/internal/ssa/gen/ARM.rules index fdf4d1e900..8b0e82f154 100644 --- a/src/cmd/compile/internal/ssa/gen/ARM.rules +++ b/src/cmd/compile/internal/ssa/gen/ARM.rules @@ -1544,3 +1544,7 @@ (GE (CMPconst [0] l:(XORshiftLLreg x y z)) yes no) && l.Uses==1 -> (GE (TEQshiftLLreg x y z) yes no) (GE (CMPconst [0] l:(XORshiftRLreg x y z)) yes no) && l.Uses==1 -> (GE (TEQshiftRLreg x y z) yes no) (GE (CMPconst [0] l:(XORshiftRAreg x y z)) yes no) && l.Uses==1 -> (GE (TEQshiftRAreg x y z) yes no) + +(MOVBUload [off] {sym} (SB) _) && symIsRO(sym) -> (MOVWconst [int64(read8(sym, off))]) +(MOVHUload [off] {sym} (SB) _) && symIsRO(sym) -> (MOVWconst [int64(read16(sym, off, config.BigEndian))]) +(MOVWload [off] {sym} (SB) _) && symIsRO(sym) -> (MOVWconst [int64(int32(read32(sym, off, config.BigEndian)))]) diff --git a/src/cmd/compile/internal/ssa/gen/ARM64.rules b/src/cmd/compile/internal/ssa/gen/ARM64.rules index 659081ec8b..1efce66016 100644 --- a/src/cmd/compile/internal/ssa/gen/ARM64.rules +++ b/src/cmd/compile/internal/ssa/gen/ARM64.rules @@ -2957,3 +2957,8 @@ (FSUBD a (FNMULD x y)) -> (FMADDD a x y) (FSUBS (FNMULS x y) a) -> (FNMADDS a x y) (FSUBD (FNMULD x y) a) -> (FNMADDD a x y) + +(MOVBUload [off] {sym} (SB) _) && symIsRO(sym) -> (MOVDconst [int64(read8(sym, off))]) +(MOVHUload [off] {sym} (SB) _) && symIsRO(sym) -> (MOVDconst [int64(read16(sym, off, config.BigEndian))]) +(MOVWUload [off] {sym} (SB) _) && symIsRO(sym) -> (MOVDconst [int64(read32(sym, off, config.BigEndian))]) +(MOVDload [off] {sym} (SB) _) && symIsRO(sym) -> (MOVDconst [int64(read64(sym, off, config.BigEndian))]) diff --git a/src/cmd/compile/internal/ssa/rewrite.go b/src/cmd/compile/internal/ssa/rewrite.go index fd5f684eda..b93dce2004 100644 --- a/src/cmd/compile/internal/ssa/rewrite.go +++ b/src/cmd/compile/internal/ssa/rewrite.go @@ -7,7 +7,9 @@ package ssa import ( "cmd/compile/internal/types" "cmd/internal/obj" + "cmd/internal/objabi" "cmd/internal/src" + "encoding/binary" "fmt" "io" "math" @@ -1090,3 +1092,45 @@ func needRaceCleanup(sym interface{}, v *Value) bool { } return true } + +// symIsRO reports whether sym is a read-only global. +func symIsRO(sym interface{}) bool { + lsym := sym.(*obj.LSym) + return lsym.Type == objabi.SRODATA && len(lsym.R) == 0 +} + +// read8 reads one byte from the read-only global sym at offset off. +func read8(sym interface{}, off int64) uint8 { + lsym := sym.(*obj.LSym) + return lsym.P[off] +} + +// read16 reads two bytes from the read-only global sym at offset off. +func read16(sym interface{}, off int64, bigEndian bool) uint16 { + lsym := sym.(*obj.LSym) + if bigEndian { + return binary.BigEndian.Uint16(lsym.P[off:]) + } else { + return binary.LittleEndian.Uint16(lsym.P[off:]) + } +} + +// read32 reads four bytes from the read-only global sym at offset off. +func read32(sym interface{}, off int64, bigEndian bool) uint32 { + lsym := sym.(*obj.LSym) + if bigEndian { + return binary.BigEndian.Uint32(lsym.P[off:]) + } else { + return binary.LittleEndian.Uint32(lsym.P[off:]) + } +} + +// read64 reads eight bytes from the read-only global sym at offset off. +func read64(sym interface{}, off int64, bigEndian bool) uint64 { + lsym := sym.(*obj.LSym) + if bigEndian { + return binary.BigEndian.Uint64(lsym.P[off:]) + } else { + return binary.LittleEndian.Uint64(lsym.P[off:]) + } +} diff --git a/src/cmd/compile/internal/ssa/rewrite386.go b/src/cmd/compile/internal/ssa/rewrite386.go index 3fb820933c..9b2ec74a9d 100644 --- a/src/cmd/compile/internal/ssa/rewrite386.go +++ b/src/cmd/compile/internal/ssa/rewrite386.go @@ -5242,6 +5242,24 @@ func rewriteValue386_Op386MOVBload_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVBload [off] {sym} (SB) _) + // cond: symIsRO(sym) + // result: (MOVLconst [int64(read8(sym, off))]) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpSB { + break + } + if !(symIsRO(sym)) { + break + } + v.reset(Op386MOVLconst) + v.AuxInt = int64(read8(sym, off)) + return true + } return false } func rewriteValue386_Op386MOVBloadidx1_0(v *Value) bool { @@ -6530,6 +6548,24 @@ func rewriteValue386_Op386MOVLload_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVLload [off] {sym} (SB) _) + // cond: symIsRO(sym) + // result: (MOVLconst [int64(int32(read32(sym, off, config.BigEndian)))]) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpSB { + break + } + if !(symIsRO(sym)) { + break + } + v.reset(Op386MOVLconst) + v.AuxInt = int64(int32(read32(sym, off, config.BigEndian))) + return true + } return false } func rewriteValue386_Op386MOVLloadidx1_0(v *Value) bool { @@ -10259,6 +10295,24 @@ func rewriteValue386_Op386MOVWload_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVWload [off] {sym} (SB) _) + // cond: symIsRO(sym) + // result: (MOVLconst [int64(read16(sym, off, config.BigEndian))]) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpSB { + break + } + if !(symIsRO(sym)) { + break + } + v.reset(Op386MOVLconst) + v.AuxInt = int64(read16(sym, off, config.BigEndian)) + return true + } return false } func rewriteValue386_Op386MOVWloadidx1_0(v *Value) bool { diff --git a/src/cmd/compile/internal/ssa/rewriteAMD64.go b/src/cmd/compile/internal/ssa/rewriteAMD64.go index 89fc6780b9..e89ed9edb6 100644 --- a/src/cmd/compile/internal/ssa/rewriteAMD64.go +++ b/src/cmd/compile/internal/ssa/rewriteAMD64.go @@ -268,7 +268,7 @@ func rewriteValueAMD64(v *Value) bool { case OpAMD64MOVLi2f: return rewriteValueAMD64_OpAMD64MOVLi2f_0(v) case OpAMD64MOVLload: - return rewriteValueAMD64_OpAMD64MOVLload_0(v) + return rewriteValueAMD64_OpAMD64MOVLload_0(v) || rewriteValueAMD64_OpAMD64MOVLload_10(v) case OpAMD64MOVLloadidx1: return rewriteValueAMD64_OpAMD64MOVLloadidx1_0(v) case OpAMD64MOVLloadidx4: @@ -12446,6 +12446,24 @@ func rewriteValueAMD64_OpAMD64MOVBload_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVBload [off] {sym} (SB) _) + // cond: symIsRO(sym) + // result: (MOVLconst [int64(read8(sym, off))]) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpSB { + break + } + if !(symIsRO(sym)) { + break + } + v.reset(OpAMD64MOVLconst) + v.AuxInt = int64(read8(sym, off)) + return true + } return false } func rewriteValueAMD64_OpAMD64MOVBloadidx1_0(v *Value) bool { @@ -12953,6 +12971,30 @@ func rewriteValueAMD64_OpAMD64MOVBstore_10(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVBstore [off] {sym} ptr (MOVQconst [c]) mem) + // cond: validOff(off) + // result: (MOVBstoreconst [makeValAndOff(int64(int8(c)),off)] {sym} ptr mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[2] + ptr := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != OpAMD64MOVQconst { + break + } + c := v_1.AuxInt + mem := v.Args[2] + if !(validOff(off)) { + break + } + v.reset(OpAMD64MOVBstoreconst) + v.AuxInt = makeValAndOff(int64(int8(c)), off) + v.Aux = sym + v.AddArg(ptr) + v.AddArg(mem) + return true + } // match: (MOVBstore [off1] {sym1} (LEAQ [off2] {sym2} base) val mem) // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) // result: (MOVBstore [off1+off2] {mergeSym(sym1,sym2)} base val mem) @@ -13181,6 +13223,13 @@ func rewriteValueAMD64_OpAMD64MOVBstore_10(v *Value) bool { v.AddArg(mem) return true } + return false +} +func rewriteValueAMD64_OpAMD64MOVBstore_20(v *Value) bool { + b := v.Block + _ = b + typ := &b.Func.Config.Types + _ = typ // match: (MOVBstore [i] {s} p w x6:(MOVBstore [i-1] {s} p (SHRQconst [8] w) x5:(MOVBstore [i-2] {s} p (SHRQconst [16] w) x4:(MOVBstore [i-3] {s} p (SHRQconst [24] w) x3:(MOVBstore [i-4] {s} p (SHRQconst [32] w) x2:(MOVBstore [i-5] {s} p (SHRQconst [40] w) x1:(MOVBstore [i-6] {s} p (SHRQconst [48] w) x0:(MOVBstore [i-7] {s} p (SHRQconst [56] w) mem)))))))) // cond: x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && x3.Uses == 1 && x4.Uses == 1 && x5.Uses == 1 && x6.Uses == 1 && clobber(x0) && clobber(x1) && clobber(x2) && clobber(x3) && clobber(x4) && clobber(x5) && clobber(x6) // result: (MOVQstore [i-7] {s} p (BSWAPQ w) mem) @@ -13372,13 +13421,6 @@ func rewriteValueAMD64_OpAMD64MOVBstore_10(v *Value) bool { v.AddArg(mem) return true } - return false -} -func rewriteValueAMD64_OpAMD64MOVBstore_20(v *Value) bool { - b := v.Block - _ = b - typ := &b.Func.Config.Types - _ = typ // match: (MOVBstore [i] {s} p (SHRWconst [8] w) x:(MOVBstore [i-1] {s} p w mem)) // cond: x.Uses == 1 && clobber(x) // result: (MOVWstore [i-1] {s} p w mem) @@ -15449,6 +15491,31 @@ func rewriteValueAMD64_OpAMD64MOVLload_0(v *Value) bool { } return false } +func rewriteValueAMD64_OpAMD64MOVLload_10(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config + // match: (MOVLload [off] {sym} (SB) _) + // cond: symIsRO(sym) + // result: (MOVQconst [int64(read32(sym, off, config.BigEndian))]) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpSB { + break + } + if !(symIsRO(sym)) { + break + } + v.reset(OpAMD64MOVQconst) + v.AuxInt = int64(read32(sym, off, config.BigEndian)) + return true + } + return false +} func rewriteValueAMD64_OpAMD64MOVLloadidx1_0(v *Value) bool { // match: (MOVLloadidx1 [c] {sym} ptr (SHLQconst [2] idx) mem) // cond: @@ -15957,6 +16024,30 @@ func rewriteValueAMD64_OpAMD64MOVLstore_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVLstore [off] {sym} ptr (MOVQconst [c]) mem) + // cond: validOff(off) + // result: (MOVLstoreconst [makeValAndOff(int64(int32(c)),off)] {sym} ptr mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[2] + ptr := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != OpAMD64MOVQconst { + break + } + c := v_1.AuxInt + mem := v.Args[2] + if !(validOff(off)) { + break + } + v.reset(OpAMD64MOVLstoreconst) + v.AuxInt = makeValAndOff(int64(int32(c)), off) + v.Aux = sym + v.AddArg(ptr) + v.AddArg(mem) + return true + } // match: (MOVLstore [off1] {sym1} (LEAQ [off2] {sym2} base) val mem) // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) // result: (MOVLstore [off1+off2] {mergeSym(sym1,sym2)} base val mem) @@ -16102,6 +16193,13 @@ func rewriteValueAMD64_OpAMD64MOVLstore_0(v *Value) bool { v.AddArg(mem) return true } + return false +} +func rewriteValueAMD64_OpAMD64MOVLstore_10(v *Value) bool { + b := v.Block + _ = b + typ := &b.Func.Config.Types + _ = typ // match: (MOVLstore [i] {s} p (SHRQconst [32] w) x:(MOVLstore [i-4] {s} p w mem)) // cond: x.Uses == 1 && clobber(x) // result: (MOVQstore [i-4] {s} p w mem) @@ -16147,13 +16245,6 @@ func rewriteValueAMD64_OpAMD64MOVLstore_0(v *Value) bool { v.AddArg(mem) return true } - return false -} -func rewriteValueAMD64_OpAMD64MOVLstore_10(v *Value) bool { - b := v.Block - _ = b - typ := &b.Func.Config.Types - _ = typ // match: (MOVLstore [i] {s} p (SHRQconst [j] w) x:(MOVLstore [i-4] {s} p w0:(SHRQconst [j-32] w) mem)) // cond: x.Uses == 1 && clobber(x) // result: (MOVQstore [i-4] {s} p w0 mem) @@ -16519,6 +16610,9 @@ func rewriteValueAMD64_OpAMD64MOVLstore_10(v *Value) bool { v.AddArg(mem) return true } + return false +} +func rewriteValueAMD64_OpAMD64MOVLstore_20(v *Value) bool { // match: (MOVLstore {sym} [off] ptr y:(ADDL x l:(MOVLload [off] {sym} ptr mem)) mem) // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) // result: (ADDLmodify [off] {sym} ptr x mem) @@ -16562,9 +16656,6 @@ func rewriteValueAMD64_OpAMD64MOVLstore_10(v *Value) bool { v.AddArg(mem) return true } - return false -} -func rewriteValueAMD64_OpAMD64MOVLstore_20(v *Value) bool { // match: (MOVLstore {sym} [off] ptr y:(SUBL l:(MOVLload [off] {sym} ptr mem) x) mem) // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) // result: (SUBLmodify [off] {sym} ptr x mem) @@ -16952,6 +17043,9 @@ func rewriteValueAMD64_OpAMD64MOVLstore_20(v *Value) bool { v.AddArg(mem) return true } + return false +} +func rewriteValueAMD64_OpAMD64MOVLstore_30(v *Value) bool { // match: (MOVLstore {sym} [off] ptr y:(BTSL l:(MOVLload [off] {sym} ptr mem) x) mem) // cond: y.Uses==1 && l.Uses==1 && clobber(y) && clobber(l) // result: (BTSLmodify [off] {sym} ptr x mem) @@ -16995,9 +17089,6 @@ func rewriteValueAMD64_OpAMD64MOVLstore_20(v *Value) bool { v.AddArg(mem) return true } - return false -} -func rewriteValueAMD64_OpAMD64MOVLstore_30(v *Value) bool { // match: (MOVLstore [off] {sym} ptr a:(ADDLconst [c] l:(MOVLload [off] {sym} ptr2 mem)) mem) // cond: isSamePtr(ptr, ptr2) && a.Uses == 1 && l.Uses == 1 && validValAndOff(c,off) && clobber(l) && clobber(a) // result: (ADDLconstmodify {sym} [makeValAndOff(c,off)] ptr mem) @@ -18481,6 +18572,10 @@ func rewriteValueAMD64_OpAMD64MOVQi2f_0(v *Value) bool { return false } func rewriteValueAMD64_OpAMD64MOVQload_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config // match: (MOVQload [off] {sym} ptr (MOVQstore [off2] {sym2} ptr2 x _)) // cond: sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) // result: x @@ -18713,6 +18808,24 @@ func rewriteValueAMD64_OpAMD64MOVQload_0(v *Value) bool { v.AddArg(val) return true } + // match: (MOVQload [off] {sym} (SB) _) + // cond: symIsRO(sym) + // result: (MOVQconst [int64(read64(sym, off, config.BigEndian))]) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpSB { + break + } + if !(symIsRO(sym)) { + break + } + v.reset(OpAMD64MOVQconst) + v.AuxInt = int64(read64(sym, off, config.BigEndian)) + return true + } return false } func rewriteValueAMD64_OpAMD64MOVQloadidx1_0(v *Value) bool { @@ -22529,6 +22642,10 @@ func rewriteValueAMD64_OpAMD64MOVWQZX_0(v *Value) bool { return false } func rewriteValueAMD64_OpAMD64MOVWload_0(v *Value) bool { + b := v.Block + _ = b + config := b.Func.Config + _ = config // match: (MOVWload [off] {sym} ptr (MOVWstore [off2] {sym2} ptr2 x _)) // cond: sym == sym2 && off == off2 && isSamePtr(ptr, ptr2) // result: (MOVWQZX x) @@ -22733,6 +22850,24 @@ func rewriteValueAMD64_OpAMD64MOVWload_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVWload [off] {sym} (SB) _) + // cond: symIsRO(sym) + // result: (MOVLconst [int64(read16(sym, off, config.BigEndian))]) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpSB { + break + } + if !(symIsRO(sym)) { + break + } + v.reset(OpAMD64MOVLconst) + v.AuxInt = int64(read16(sym, off, config.BigEndian)) + return true + } return false } func rewriteValueAMD64_OpAMD64MOVWloadidx1_0(v *Value) bool { @@ -23114,6 +23249,30 @@ func rewriteValueAMD64_OpAMD64MOVWstore_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVWstore [off] {sym} ptr (MOVQconst [c]) mem) + // cond: validOff(off) + // result: (MOVWstoreconst [makeValAndOff(int64(int16(c)),off)] {sym} ptr mem) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[2] + ptr := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != OpAMD64MOVQconst { + break + } + c := v_1.AuxInt + mem := v.Args[2] + if !(validOff(off)) { + break + } + v.reset(OpAMD64MOVWstoreconst) + v.AuxInt = makeValAndOff(int64(int16(c)), off) + v.Aux = sym + v.AddArg(ptr) + v.AddArg(mem) + return true + } // match: (MOVWstore [off1] {sym1} (LEAQ [off2] {sym2} base) val mem) // cond: is32Bit(off1+off2) && canMergeSym(sym1, sym2) // result: (MOVWstore [off1+off2] {mergeSym(sym1,sym2)} base val mem) @@ -23274,6 +23433,13 @@ func rewriteValueAMD64_OpAMD64MOVWstore_0(v *Value) bool { v.AddArg(mem) return true } + return false +} +func rewriteValueAMD64_OpAMD64MOVWstore_10(v *Value) bool { + b := v.Block + _ = b + typ := &b.Func.Config.Types + _ = typ // match: (MOVWstore [i] {s} p (SHRQconst [16] w) x:(MOVWstore [i-2] {s} p w mem)) // cond: x.Uses == 1 && clobber(x) // result: (MOVLstore [i-2] {s} p w mem) @@ -23319,13 +23485,6 @@ func rewriteValueAMD64_OpAMD64MOVWstore_0(v *Value) bool { v.AddArg(mem) return true } - return false -} -func rewriteValueAMD64_OpAMD64MOVWstore_10(v *Value) bool { - b := v.Block - _ = b - typ := &b.Func.Config.Types - _ = typ // match: (MOVWstore [i] {s} p (SHRLconst [j] w) x:(MOVWstore [i-2] {s} p w0:(SHRLconst [j-16] w) mem)) // cond: x.Uses == 1 && clobber(x) // result: (MOVLstore [i-2] {s} p w0 mem) diff --git a/src/cmd/compile/internal/ssa/rewriteARM.go b/src/cmd/compile/internal/ssa/rewriteARM.go index 966413ab25..4f6f61544e 100644 --- a/src/cmd/compile/internal/ssa/rewriteARM.go +++ b/src/cmd/compile/internal/ssa/rewriteARM.go @@ -6883,6 +6883,24 @@ func rewriteValueARM_OpARMMOVBUload_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVBUload [off] {sym} (SB) _) + // cond: symIsRO(sym) + // result: (MOVWconst [int64(read8(sym, off))]) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpSB { + break + } + if !(symIsRO(sym)) { + break + } + v.reset(OpARMMOVWconst) + v.AuxInt = int64(read8(sym, off)) + return true + } return false } func rewriteValueARM_OpARMMOVBUloadidx_0(v *Value) bool { @@ -7953,6 +7971,24 @@ func rewriteValueARM_OpARMMOVHUload_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVHUload [off] {sym} (SB) _) + // cond: symIsRO(sym) + // result: (MOVWconst [int64(read16(sym, off, config.BigEndian))]) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpSB { + break + } + if !(symIsRO(sym)) { + break + } + v.reset(OpARMMOVWconst) + v.AuxInt = int64(read16(sym, off, config.BigEndian)) + return true + } return false } func rewriteValueARM_OpARMMOVHUloadidx_0(v *Value) bool { @@ -8797,6 +8833,24 @@ func rewriteValueARM_OpARMMOVWload_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVWload [off] {sym} (SB) _) + // cond: symIsRO(sym) + // result: (MOVWconst [int64(int32(read32(sym, off, config.BigEndian)))]) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpSB { + break + } + if !(symIsRO(sym)) { + break + } + v.reset(OpARMMOVWconst) + v.AuxInt = int64(int32(read32(sym, off, config.BigEndian))) + return true + } return false } func rewriteValueARM_OpARMMOVWloadidx_0(v *Value) bool { diff --git a/src/cmd/compile/internal/ssa/rewriteARM64.go b/src/cmd/compile/internal/ssa/rewriteARM64.go index ba38ae0505..b9bb109b9e 100644 --- a/src/cmd/compile/internal/ssa/rewriteARM64.go +++ b/src/cmd/compile/internal/ssa/rewriteARM64.go @@ -8934,6 +8934,24 @@ func rewriteValueARM64_OpARM64MOVBUload_0(v *Value) bool { v.AuxInt = 0 return true } + // match: (MOVBUload [off] {sym} (SB) _) + // cond: symIsRO(sym) + // result: (MOVDconst [int64(read8(sym, off))]) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpSB { + break + } + if !(symIsRO(sym)) { + break + } + v.reset(OpARM64MOVDconst) + v.AuxInt = int64(read8(sym, off)) + return true + } return false } func rewriteValueARM64_OpARM64MOVBUloadidx_0(v *Value) bool { @@ -12638,6 +12656,24 @@ func rewriteValueARM64_OpARM64MOVDload_0(v *Value) bool { v.AuxInt = 0 return true } + // match: (MOVDload [off] {sym} (SB) _) + // cond: symIsRO(sym) + // result: (MOVDconst [int64(read64(sym, off, config.BigEndian))]) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpSB { + break + } + if !(symIsRO(sym)) { + break + } + v.reset(OpARM64MOVDconst) + v.AuxInt = int64(read64(sym, off, config.BigEndian)) + return true + } return false } func rewriteValueARM64_OpARM64MOVDloadidx_0(v *Value) bool { @@ -13563,6 +13599,24 @@ func rewriteValueARM64_OpARM64MOVHUload_0(v *Value) bool { v.AuxInt = 0 return true } + // match: (MOVHUload [off] {sym} (SB) _) + // cond: symIsRO(sym) + // result: (MOVDconst [int64(read16(sym, off, config.BigEndian))]) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpSB { + break + } + if !(symIsRO(sym)) { + break + } + v.reset(OpARM64MOVDconst) + v.AuxInt = int64(read16(sym, off, config.BigEndian)) + return true + } return false } func rewriteValueARM64_OpARM64MOVHUloadidx_0(v *Value) bool { @@ -16183,6 +16237,24 @@ func rewriteValueARM64_OpARM64MOVWUload_0(v *Value) bool { v.AuxInt = 0 return true } + // match: (MOVWUload [off] {sym} (SB) _) + // cond: symIsRO(sym) + // result: (MOVDconst [int64(read32(sym, off, config.BigEndian))]) + for { + off := v.AuxInt + sym := v.Aux + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpSB { + break + } + if !(symIsRO(sym)) { + break + } + v.reset(OpARM64MOVDconst) + v.AuxInt = int64(read32(sym, off, config.BigEndian)) + return true + } return false } func rewriteValueARM64_OpARM64MOVWUloadidx_0(v *Value) bool { diff --git a/test/codegen/strings.go b/test/codegen/strings.go index f4adfac0cc..39ee2e8b9f 100644 --- a/test/codegen/strings.go +++ b/test/codegen/strings.go @@ -20,3 +20,30 @@ func ToByteSlice() []byte { // Issue #24698 // amd64:-`.*runtime.stringtoslicebyte` return []byte("foo") } + +// Loading from read-only symbols should get transformed into constants. +func ConstantLoad() { + // 12592 = 0x3130 + // 50 = 0x32 + // amd64:`MOVW\t\$12592, \(`,`MOVB\t\$50, 2\(` + // 386:`MOVW\t\$12592, \(`,`MOVB\t\$50, 2\(` + // arm:`MOVW\t\$48`,`MOVW\t\$49`,`MOVW\t\$50` + // arm64:`MOVD\t\$12592`,`MOVD\t\$50` + bsink = []byte("012") + + // 858927408 = 0x33323130 + // 13620 = 0x3534 + // amd64:`MOVL\t\$858927408`,`MOVW\t\$13620, 4\(` + // 386:`MOVL\t\$858927408`,`MOVW\t\$13620, 4\(` + // arm64:`MOVD\t\$858927408`,`MOVD\t\$13620` + bsink = []byte("012345") + + // 3978425819141910832 = 0x3736353433323130 + // 7306073769690871863 = 0x6564636261393837 + // amd64:`MOVQ\t\$3978425819141910832`,`MOVQ\t\$7306073769690871863` + // 386:`MOVL\t\$858927408, \(`,`DUFFCOPY` + // arm64:`MOVD\t\$3978425819141910832`,`MOVD\t\$1650538808`,`MOVD\t\$25699`,`MOVD\t\$101` + bsink = []byte("0123456789abcde") +} + +var bsink []byte From 0e9f8a21f8b6534931f1ab50909161a289a0da3c Mon Sep 17 00:00:00 2001 From: Keith Randall Date: Fri, 14 Sep 2018 10:09:08 -0700 Subject: [PATCH 123/240] runtime,cmd/compile: pass strings and slices to convT2{E,I} by value When we pass these types by reference, we usually have to allocate temporaries on the stack, initialize them, then pass their address to the conversion functions. It's simpler to pass these types directly by value. This particularly applies to conversions needed for fmt.Printf (to interface{} for constructing a [...]interface{}). func f(a, b, c string) { fmt.Printf("%s %s\n", a, b) fmt.Printf("%s %s\n", b, c) } This function's stack frame shrinks from 200 to 136 bytes, and its code shrinks from 535 to 453 bytes. The go binary shrinks 0.3%. Update #24286 Aside: for this function f, we don't really need to allocate temporaries for the convT2E function. We could use the address of a, b, and c directly. That might get similar (or maybe better?) improvements. I investigated a bit, but it seemed complicated to do it safely. This change was much easier. Change-Id: I78cbe51b501fb41e1e324ce4203f0de56a1db82d Reviewed-on: https://go-review.googlesource.com/c/135377 Run-TryBot: Keith Randall TryBot-Result: Gobot Gobot Reviewed-by: Josh Bleecher Snyder --- src/cmd/compile/internal/gc/builtin.go | 8 +-- .../compile/internal/gc/builtin/runtime.go | 8 +-- src/cmd/compile/internal/gc/order.go | 13 +++-- src/cmd/compile/internal/gc/walk.go | 8 +-- src/runtime/iface.go | 58 ++++++------------- test/fixedbugs/issue20250.go | 4 +- test/live.go | 8 +-- 7 files changed, 45 insertions(+), 62 deletions(-) diff --git a/src/cmd/compile/internal/gc/builtin.go b/src/cmd/compile/internal/gc/builtin.go index ec8f1093b6..8051c7d0df 100644 --- a/src/cmd/compile/internal/gc/builtin.go +++ b/src/cmd/compile/internal/gc/builtin.go @@ -55,15 +55,15 @@ var runtimeDecls = [...]struct { {"convT2E16", funcTag, 52}, {"convT2E32", funcTag, 52}, {"convT2E64", funcTag, 52}, - {"convT2Estring", funcTag, 53}, - {"convT2Eslice", funcTag, 53}, + {"convT2Estring", funcTag, 52}, + {"convT2Eslice", funcTag, 52}, {"convT2Enoptr", funcTag, 53}, {"convT2I", funcTag, 53}, {"convT2I16", funcTag, 52}, {"convT2I32", funcTag, 52}, {"convT2I64", funcTag, 52}, - {"convT2Istring", funcTag, 53}, - {"convT2Islice", funcTag, 53}, + {"convT2Istring", funcTag, 52}, + {"convT2Islice", funcTag, 52}, {"convT2Inoptr", funcTag, 53}, {"assertE2I", funcTag, 52}, {"assertE2I2", funcTag, 54}, diff --git a/src/cmd/compile/internal/gc/builtin/runtime.go b/src/cmd/compile/internal/gc/builtin/runtime.go index 140b7f3b2d..028936b875 100644 --- a/src/cmd/compile/internal/gc/builtin/runtime.go +++ b/src/cmd/compile/internal/gc/builtin/runtime.go @@ -68,16 +68,16 @@ func convT2E(typ *byte, elem *any) (ret any) func convT2E16(typ *byte, val any) (ret any) func convT2E32(typ *byte, val any) (ret any) func convT2E64(typ *byte, val any) (ret any) -func convT2Estring(typ *byte, elem *any) (ret any) -func convT2Eslice(typ *byte, elem *any) (ret any) +func convT2Estring(typ *byte, val any) (ret any) // val must be a string +func convT2Eslice(typ *byte, val any) (ret any) // val must be a slice func convT2Enoptr(typ *byte, elem *any) (ret any) func convT2I(tab *byte, elem *any) (ret any) func convT2I16(tab *byte, val any) (ret any) func convT2I32(tab *byte, val any) (ret any) func convT2I64(tab *byte, val any) (ret any) -func convT2Istring(tab *byte, elem *any) (ret any) -func convT2Islice(tab *byte, elem *any) (ret any) +func convT2Istring(tab *byte, val any) (ret any) // val must be a string +func convT2Islice(tab *byte, val any) (ret any) // val must be a slice func convT2Inoptr(tab *byte, elem *any) (ret any) // interface type assertions x.(T) diff --git a/src/cmd/compile/internal/gc/order.go b/src/cmd/compile/internal/gc/order.go index 8afb136515..fbc05b95d2 100644 --- a/src/cmd/compile/internal/gc/order.go +++ b/src/cmd/compile/internal/gc/order.go @@ -1042,12 +1042,17 @@ func (o *Order) expr(n, lhs *Node) *Node { n = o.copyExpr(n, n.Type, false) } - // concrete type (not interface) argument must be addressable - // temporary to pass to runtime. + // concrete type (not interface) argument might need an addressable + // temporary to pass to the runtime conversion routine. case OCONVIFACE: n.Left = o.expr(n.Left, nil) - - if !n.Left.Type.IsInterface() { + if n.Left.Type.IsInterface() { + break + } + if _, needsaddr := convFuncName(n.Left.Type, n.Type); needsaddr || consttype(n.Left) > 0 { + // Need a temp if we need to pass the address to the conversion function. + // We also process constants here, making a named static global whose + // address we can put directly in an interface (see OCONVIFACE case in walk). n.Left = o.addrTemp(n.Left) } diff --git a/src/cmd/compile/internal/gc/walk.go b/src/cmd/compile/internal/gc/walk.go index d33674f221..f7676310e9 100644 --- a/src/cmd/compile/internal/gc/walk.go +++ b/src/cmd/compile/internal/gc/walk.go @@ -417,9 +417,9 @@ func convFuncName(from, to *types.Type) (fnname string, needsaddr bool) { case from.Size() == 8 && from.Align == types.Types[TUINT64].Align && !types.Haspointers(from): return "convT2E64", false case from.IsString(): - return "convT2Estring", true + return "convT2Estring", false case from.IsSlice(): - return "convT2Eslice", true + return "convT2Eslice", false case !types.Haspointers(from): return "convT2Enoptr", true } @@ -433,9 +433,9 @@ func convFuncName(from, to *types.Type) (fnname string, needsaddr bool) { case from.Size() == 8 && from.Align == types.Types[TUINT64].Align && !types.Haspointers(from): return "convT2I64", false case from.IsString(): - return "convT2Istring", true + return "convT2Istring", false case from.IsSlice(): - return "convT2Islice", true + return "convT2Islice", false case !types.Haspointers(from): return "convT2Inoptr", true } diff --git a/src/runtime/iface.go b/src/runtime/iface.go index 7ab731151e..1ef9825a48 100644 --- a/src/runtime/iface.go +++ b/src/runtime/iface.go @@ -329,38 +329,27 @@ func convT2E64(t *_type, val uint64) (e eface) { return } -func convT2Estring(t *_type, elem unsafe.Pointer) (e eface) { - if raceenabled { - raceReadObjectPC(t, elem, getcallerpc(), funcPC(convT2Estring)) - } - if msanenabled { - msanread(elem, t.size) - } +func convT2Estring(t *_type, val string) (e eface) { var x unsafe.Pointer - if *(*string)(elem) == "" { + if val == "" { x = unsafe.Pointer(&zeroVal[0]) } else { - x = mallocgc(t.size, t, true) - *(*string)(x) = *(*string)(elem) + x = mallocgc(unsafe.Sizeof(val), t, true) + *(*string)(x) = val } e._type = t e.data = x return } -func convT2Eslice(t *_type, elem unsafe.Pointer) (e eface) { - if raceenabled { - raceReadObjectPC(t, elem, getcallerpc(), funcPC(convT2Eslice)) - } - if msanenabled { - msanread(elem, t.size) - } +func convT2Eslice(t *_type, val []byte) (e eface) { + // Note: this must work for any element type, not just byte. var x unsafe.Pointer - if v := *(*slice)(elem); uintptr(v.array) == 0 { + if (*slice)(unsafe.Pointer(&val)).array == nil { x = unsafe.Pointer(&zeroVal[0]) } else { - x = mallocgc(t.size, t, true) - *(*slice)(x) = *(*slice)(elem) + x = mallocgc(unsafe.Sizeof(val), t, true) + *(*[]byte)(x) = val } e._type = t e.data = x @@ -438,40 +427,29 @@ func convT2I64(tab *itab, val uint64) (i iface) { return } -func convT2Istring(tab *itab, elem unsafe.Pointer) (i iface) { +func convT2Istring(tab *itab, val string) (i iface) { t := tab._type - if raceenabled { - raceReadObjectPC(t, elem, getcallerpc(), funcPC(convT2Istring)) - } - if msanenabled { - msanread(elem, t.size) - } var x unsafe.Pointer - if *(*string)(elem) == "" { + if val == "" { x = unsafe.Pointer(&zeroVal[0]) } else { - x = mallocgc(t.size, t, true) - *(*string)(x) = *(*string)(elem) + x = mallocgc(unsafe.Sizeof(val), t, true) + *(*string)(x) = val } i.tab = tab i.data = x return } -func convT2Islice(tab *itab, elem unsafe.Pointer) (i iface) { +func convT2Islice(tab *itab, val []byte) (i iface) { + // Note: this must work for any element type, not just byte. t := tab._type - if raceenabled { - raceReadObjectPC(t, elem, getcallerpc(), funcPC(convT2Islice)) - } - if msanenabled { - msanread(elem, t.size) - } var x unsafe.Pointer - if v := *(*slice)(elem); uintptr(v.array) == 0 { + if (*slice)(unsafe.Pointer(&val)).array == nil { x = unsafe.Pointer(&zeroVal[0]) } else { - x = mallocgc(t.size, t, true) - *(*slice)(x) = *(*slice)(elem) + x = mallocgc(unsafe.Sizeof(val), t, true) + *(*[]byte)(x) = val } i.tab = tab i.data = x diff --git a/test/fixedbugs/issue20250.go b/test/fixedbugs/issue20250.go index 47879385d2..c190515274 100644 --- a/test/fixedbugs/issue20250.go +++ b/test/fixedbugs/issue20250.go @@ -11,13 +11,13 @@ package p type T struct { - s string + s [2]string } func f(a T) { // ERROR "live at entry to f: a" var e interface{} // ERROR "stack object e interface \{\}$" func() { // ERROR "live at entry to f.func1: a &e" - e = a.s // ERROR "live at call to convT2Estring: &e" "stack object a T$" + e = a.s // ERROR "live at call to convT2E: &e" "stack object a T$" }() // Before the fix, both a and e were live at the previous line. _ = e diff --git a/test/live.go b/test/live.go index 679562d9bf..ba50f5b779 100644 --- a/test/live.go +++ b/test/live.go @@ -141,7 +141,7 @@ var i9 interface{} func f9() bool { g8() x := i9 - y := interface{}(str()) // ERROR "live at call to convT2Estring: x.data$" "live at call to str: x.data$" "stack object .autotmp_[0-9]+ string$" + y := interface{}(g18()) // ERROR "live at call to convT2E: x.data$" "live at call to g18: x.data$" "stack object .autotmp_[0-9]+ \[2\]string$" i9 = y // make y escape so the line above has to call convT2E return x != y } @@ -493,13 +493,13 @@ func f30(b bool) { func f31(b1, b2, b3 bool) { if b1 { - g31(str()) // ERROR "stack object .autotmp_[0-9]+ string$" + g31(g18()) // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" } if b2 { - h31(str()) // ERROR "live at call to convT2Estring: .autotmp_[0-9]+$" "live at call to newobject: .autotmp_[0-9]+$" "stack object .autotmp_[0-9]+ string$" + h31(g18()) // ERROR "live at call to convT2E: .autotmp_[0-9]+$" "live at call to newobject: .autotmp_[0-9]+$" "stack object .autotmp_[0-9]+ \[2\]string$" } if b3 { - panic(str()) // ERROR "stack object .autotmp_[0-9]+ string$" + panic(g18()) // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" } print(b3) } From 389e942745ddd7eef44b71571c463b0dfc3dcac2 Mon Sep 17 00:00:00 2001 From: Keith Randall Date: Fri, 5 Oct 2018 08:54:50 -0700 Subject: [PATCH 124/240] cmd/compile: reuse temporaries in order pass Instead of allocating a new temporary each time one is needed, keep a list of temporaries which are free (have already been VARKILLed on every path) and use one of them. Should save a lot of stack space. In a function like this: func main() { fmt.Printf("%d %d\n", 2, 3) fmt.Printf("%d %d\n", 4, 5) fmt.Printf("%d %d\n", 6, 7) } The three [2]interface{} arrays used to hold the ... args all use the same autotmp, instead of 3 different autotmps as happened previous to this CL. Change-Id: I2d728e226f81e05ae68ca8247af62014a1b032d3 Reviewed-on: https://go-review.googlesource.com/c/140301 Run-TryBot: Keith Randall TryBot-Result: Gobot Gobot Reviewed-by: Cherry Zhang --- src/cmd/compile/internal/gc/order.go | 60 +++++++++++++++++++++------- src/cmd/compile/internal/gc/sinit.go | 6 +-- test/live.go | 48 +++++++++++----------- test/uintptrescapes2.go | 4 +- 4 files changed, 75 insertions(+), 43 deletions(-) diff --git a/src/cmd/compile/internal/gc/order.go b/src/cmd/compile/internal/gc/order.go index fbc05b95d2..519fad4b7e 100644 --- a/src/cmd/compile/internal/gc/order.go +++ b/src/cmd/compile/internal/gc/order.go @@ -42,8 +42,9 @@ import ( // Order holds state during the ordering process. type Order struct { - out []*Node // list of generated statements - temp []*Node // stack of temporary variables + out []*Node // list of generated statements + temp []*Node // stack of temporary variables + free map[string][]*Node // free list of unused temporaries, by type.LongString(). } // Order rewrites fn.Nbody to apply the ordering constraints @@ -54,14 +55,30 @@ func order(fn *Node) { dumplist(s, fn.Nbody) } - orderBlock(&fn.Nbody) + orderBlock(&fn.Nbody, map[string][]*Node{}) } // newTemp allocates a new temporary with the given type, // pushes it onto the temp stack, and returns it. // If clear is true, newTemp emits code to zero the temporary. func (o *Order) newTemp(t *types.Type, clear bool) *Node { - v := temp(t) + var v *Node + // Note: LongString is close to the type equality we want, + // but not exactly. We still need to double-check with eqtype. + key := t.LongString() + a := o.free[key] + for i, n := range a { + if eqtype(t, n.Type) { + v = a[i] + a[i] = a[len(a)-1] + a = a[:len(a)-1] + o.free[key] = a + break + } + } + if v == nil { + v = temp(t) + } if clear { a := nod(OAS, v, nil) a = typecheck(a, Etop) @@ -226,6 +243,16 @@ func (o *Order) markTemp() ordermarker { // Poptemp pops temporaries off the stack until reaching the mark, // which must have been returned by marktemp. func (o *Order) popTemp(mark ordermarker) { + for _, n := range o.temp[mark:] { + if n.Type.Etype == types.TUINT8 { + // Don't recycle temps of this type. TUINT8 is used + // as a placeholder for a type to be determined later. + // TODO: fix + continue + } + key := n.Type.LongString() + o.free[key] = append(o.free[key], n) + } o.temp = o.temp[:mark] } @@ -266,8 +293,10 @@ func (o *Order) stmtList(l Nodes) { // orderBlock orders the block of statements in n into a new slice, // and then replaces the old slice in n with the new slice. -func orderBlock(n *Nodes) { +// free is a map that can be used to obtain temporary variables by type. +func orderBlock(n *Nodes, free map[string][]*Node) { var order Order + order.free = free mark := order.markTemp() order.stmtList(*n) order.cleanTemp(mark) @@ -280,6 +309,7 @@ func orderBlock(n *Nodes) { // n.Left = o.exprInPlace(n.Left) func (o *Order) exprInPlace(n *Node) *Node { var order Order + order.free = o.free n = order.expr(n, nil) n = addinit(n, order.out) @@ -293,8 +323,10 @@ func (o *Order) exprInPlace(n *Node) *Node { // and replaces it with the resulting statement list. // The result of orderStmtInPlace MUST be assigned back to n, e.g. // n.Left = orderStmtInPlace(n.Left) -func orderStmtInPlace(n *Node) *Node { +// free is a map that can be used to obtain temporary variables by type. +func orderStmtInPlace(n *Node, free map[string][]*Node) *Node { var order Order + order.free = free mark := order.markTemp() order.stmt(n) order.cleanTemp(mark) @@ -643,8 +675,8 @@ func (o *Order) stmt(n *Node) { t := o.markTemp() n.Left = o.exprInPlace(n.Left) n.Nbody.Prepend(o.cleanTempNoPop(t)...) - orderBlock(&n.Nbody) - n.Right = orderStmtInPlace(n.Right) + orderBlock(&n.Nbody, o.free) + n.Right = orderStmtInPlace(n.Right, o.free) o.out = append(o.out, n) o.cleanTemp(t) @@ -656,8 +688,8 @@ func (o *Order) stmt(n *Node) { n.Nbody.Prepend(o.cleanTempNoPop(t)...) n.Rlist.Prepend(o.cleanTempNoPop(t)...) o.popTemp(t) - orderBlock(&n.Nbody) - orderBlock(&n.Rlist) + orderBlock(&n.Nbody, o.free) + orderBlock(&n.Rlist, o.free) o.out = append(o.out, n) // Special: argument will be converted to interface using convT2E @@ -739,7 +771,7 @@ func (o *Order) stmt(n *Node) { } o.exprListInPlace(n.List) if orderBody { - orderBlock(&n.Nbody) + orderBlock(&n.Nbody, o.free) } o.out = append(o.out, n) o.cleanTemp(t) @@ -857,7 +889,7 @@ func (o *Order) stmt(n *Node) { tmp2 = typecheck(tmp2, Etop) n2.Ninit.Append(tmp2) } - orderBlock(&n2.Ninit) + orderBlock(&n2.Ninit, o.free) case OSEND: if r.Ninit.Len() != 0 { @@ -882,7 +914,7 @@ func (o *Order) stmt(n *Node) { // Also insert any ninit queued during the previous loop. // (The temporary cleaning must follow that ninit work.) for _, n3 := range n.List.Slice() { - orderBlock(&n3.Nbody) + orderBlock(&n3.Nbody, o.free) n3.Nbody.Prepend(o.cleanTempNoPop(t)...) // TODO(mdempsky): Is this actually necessary? @@ -924,7 +956,7 @@ func (o *Order) stmt(n *Node) { Fatalf("order switch case %v", ncas.Op) } o.exprListInPlace(ncas.List) - orderBlock(&ncas.Nbody) + orderBlock(&ncas.Nbody, o.free) } o.out = append(o.out, n) diff --git a/src/cmd/compile/internal/gc/sinit.go b/src/cmd/compile/internal/gc/sinit.go index 9d1114fa43..d520f21e63 100644 --- a/src/cmd/compile/internal/gc/sinit.go +++ b/src/cmd/compile/internal/gc/sinit.go @@ -751,7 +751,7 @@ func fixedlit(ctxt initContext, kind initKind, n *Node, var_ *Node, init *Nodes) case initKindStatic: genAsStatic(a) case initKindDynamic, initKindLocalCode: - a = orderStmtInPlace(a) + a = orderStmtInPlace(a, map[string][]*Node{}) a = walkstmt(a) init.Append(a) default: @@ -909,7 +909,7 @@ func slicelit(ctxt initContext, n *Node, var_ *Node, init *Nodes) { a = nod(OAS, a, value) a = typecheck(a, Etop) - a = orderStmtInPlace(a) + a = orderStmtInPlace(a, map[string][]*Node{}) a = walkstmt(a) init.Append(a) } @@ -918,7 +918,7 @@ func slicelit(ctxt initContext, n *Node, var_ *Node, init *Nodes) { a = nod(OAS, var_, nod(OSLICE, vauto, nil)) a = typecheck(a, Etop) - a = orderStmtInPlace(a) + a = orderStmtInPlace(a, map[string][]*Node{}) a = walkstmt(a) init.Append(a) } diff --git a/test/live.go b/test/live.go index ba50f5b779..6367cab96f 100644 --- a/test/live.go +++ b/test/live.go @@ -256,8 +256,8 @@ func f16() { if b { delete(mi, iface()) // ERROR "stack object .autotmp_[0-9]+ interface \{\}$" } - delete(mi, iface()) // ERROR "stack object .autotmp_[0-9]+ interface \{\}$" - delete(mi, iface()) // ERROR "stack object .autotmp_[0-9]+ interface \{\}$" + delete(mi, iface()) + delete(mi, iface()) } var m2s map[string]*byte @@ -302,8 +302,8 @@ func f18() { if b { z = m2[g18()] // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" } - z = m2[g18()] // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" - z = m2[g18()] // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" + z = m2[g18()] + z = m2[g18()] printbytepointer(z) } @@ -319,8 +319,8 @@ func f19() { if b { z = <-ch // ERROR "stack object .autotmp_[0-9]+ \*byte$" } - z = <-ch // ERROR "stack object .autotmp_[0-9]+ \*byte$" - z = <-ch // ERROR "stack object .autotmp_[0-9]+ \*byte$" "live at call to chanrecv1: .autotmp_[0-9]+$" + z = <-ch + z = <-ch // ERROR "live at call to chanrecv1: .autotmp_[0-9]+$" printbytepointer(z) } @@ -329,8 +329,8 @@ func f20() { if b { ch <- byteptr() // ERROR "stack object .autotmp_[0-9]+ \*byte$" } - ch <- byteptr() // ERROR "stack object .autotmp_[0-9]+ \*byte$" - ch <- byteptr() // ERROR "stack object .autotmp_[0-9]+ \*byte$" + ch <- byteptr() + ch <- byteptr() } func f21() { @@ -339,8 +339,8 @@ func f21() { if b { z = m2[[2]string{"x", "y"}] // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" } - z = m2[[2]string{"x", "y"}] // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" - z = m2[[2]string{"x", "y"}] // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" + z = m2[[2]string{"x", "y"}] + z = m2[[2]string{"x", "y"}] printbytepointer(z) } @@ -351,8 +351,8 @@ func f23() { if b { z, ok = m2[[2]string{"x", "y"}] // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" } - z, ok = m2[[2]string{"x", "y"}] // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" - z, ok = m2[[2]string{"x", "y"}] // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" + z, ok = m2[[2]string{"x", "y"}] + z, ok = m2[[2]string{"x", "y"}] printbytepointer(z) print(ok) } @@ -363,8 +363,8 @@ func f24() { if b { m2[[2]string{"x", "y"}] = nil // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" } - m2[[2]string{"x", "y"}] = nil // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" - m2[[2]string{"x", "y"}] = nil // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" + m2[[2]string{"x", "y"}] = nil + m2[[2]string{"x", "y"}] = nil } // defer should not cause spurious ambiguously live variables @@ -389,8 +389,8 @@ func f26(b bool) { if b { print26((*int)(nil), (*int)(nil), (*int)(nil)) // ERROR "stack object .autotmp_[0-9]+ \[3\]interface \{\}$" } - print26((*int)(nil), (*int)(nil), (*int)(nil)) // ERROR "stack object .autotmp_[0-9]+ \[3\]interface \{\}$" - print26((*int)(nil), (*int)(nil), (*int)(nil)) // ERROR "stack object .autotmp_[0-9]+ \[3\]interface \{\}$" + print26((*int)(nil), (*int)(nil), (*int)(nil)) + print26((*int)(nil), (*int)(nil), (*int)(nil)) printnl() } @@ -442,8 +442,8 @@ func f28(b bool) { if b { printstring(s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10) // ERROR "stack object .autotmp_[0-9]+ \[10\]string$" } - printstring(s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10) // ERROR "stack object .autotmp_[0-9]+ \[10\]string$" - printstring(s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10) // ERROR "stack object .autotmp_[0-9]+ \[10\]string$" + printstring(s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10) + printstring(s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10) } // map iterator should die on end of range loop @@ -454,10 +454,10 @@ func f29(b bool) { printstring(k) // ERROR "live at call to printstring: .autotmp_[0-9]+$" } } - for k := range m { // ERROR "live at call to mapiterinit: .autotmp_[0-9]+$" "live at call to mapiternext: .autotmp_[0-9]+$" "stack object .autotmp_[0-9]+ map.iter\[string\]int$" + for k := range m { // ERROR "live at call to mapiterinit: .autotmp_[0-9]+$" "live at call to mapiternext: .autotmp_[0-9]+$" printstring(k) // ERROR "live at call to printstring: .autotmp_[0-9]+$" } - for k := range m { // ERROR "live at call to mapiterinit: .autotmp_[0-9]+$" "live at call to mapiternext: .autotmp_[0-9]+$" "stack object .autotmp_[0-9]+ map.iter\[string\]int$" + for k := range m { // ERROR "live at call to mapiterinit: .autotmp_[0-9]+$" "live at call to mapiternext: .autotmp_[0-9]+$" printstring(k) // ERROR "live at call to printstring: .autotmp_[0-9]+$" } } @@ -481,10 +481,10 @@ func f30(b bool) { printintpointer(p.intp) // ERROR "live at call to printintpointer: .autotmp_[0-9]+$" } } - for _, p := range pstructarr { // ERROR "stack object .autotmp_[0-9]+ \[10\]pstruct$" + for _, p := range pstructarr { printintpointer(p.intp) // ERROR "live at call to printintpointer: .autotmp_[0-9]+$" } - for _, p := range pstructarr { // ERROR "stack object .autotmp_[0-9]+ \[10\]pstruct$" + for _, p := range pstructarr { printintpointer(p.intp) // ERROR "live at call to printintpointer: .autotmp_[0-9]+$" } } @@ -496,10 +496,10 @@ func f31(b1, b2, b3 bool) { g31(g18()) // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" } if b2 { - h31(g18()) // ERROR "live at call to convT2E: .autotmp_[0-9]+$" "live at call to newobject: .autotmp_[0-9]+$" "stack object .autotmp_[0-9]+ \[2\]string$" + h31(g18()) // ERROR "live at call to convT2E: .autotmp_[0-9]+$" "live at call to newobject: .autotmp_[0-9]+$" } if b3 { - panic(g18()) // ERROR "stack object .autotmp_[0-9]+ \[2\]string$" + panic(g18()) } print(b3) } diff --git a/test/uintptrescapes2.go b/test/uintptrescapes2.go index e7b5d721f5..2c8dfd7102 100644 --- a/test/uintptrescapes2.go +++ b/test/uintptrescapes2.go @@ -32,12 +32,12 @@ func G() { var t int // ERROR "moved to heap" F1(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to F1: .?autotmp" "&t escapes to heap" "stack object .autotmp_[0-9]+ unsafe.Pointer$" var t2 int // ERROR "moved to heap" - F3(uintptr(unsafe.Pointer(&t2))) // ERROR "live at call to F3: .?autotmp" "&t2 escapes to heap" "stack object .autotmp_[0-9]+ unsafe.Pointer$" + F3(uintptr(unsafe.Pointer(&t2))) // ERROR "live at call to F3: .?autotmp" "&t2 escapes to heap" } func H() { var v int // ERROR "moved to heap" F2(0, 1, uintptr(unsafe.Pointer(&v)), 2) // ERROR "live at call to newobject: .?autotmp" "live at call to F2: .?autotmp" "escapes to heap" "stack object .autotmp_[0-9]+ unsafe.Pointer$" var v2 int // ERROR "moved to heap" - F4(0, 1, uintptr(unsafe.Pointer(&v2)), 2) // ERROR "live at call to newobject: .?autotmp" "live at call to F4: .?autotmp" "escapes to heap" "stack object .autotmp_[0-9]+ unsafe.Pointer$" + F4(0, 1, uintptr(unsafe.Pointer(&v2)), 2) // ERROR "live at call to newobject: .?autotmp" "live at call to F4: .?autotmp" "escapes to heap" } From c3208842e138a4dd51499ca84b3bdba99ac4d413 Mon Sep 17 00:00:00 2001 From: Ben Shi Date: Mon, 15 Oct 2018 02:25:10 +0000 Subject: [PATCH 125/240] test/codegen: add tests for multiplication-subtraction This CL adds tests for armv7's MULS and arm64's MSUBW. Change-Id: Id0fd5d26fd477e4ed14389b0d33cad930423eb5b Reviewed-on: https://go-review.googlesource.com/c/141651 Run-TryBot: Ben Shi Reviewed-by: Cherry Zhang TryBot-Result: Gobot Gobot --- test/codegen/arithmetic.go | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/test/codegen/arithmetic.go b/test/codegen/arithmetic.go index 879aaf285c..b1cdef6eee 100644 --- a/test/codegen/arithmetic.go +++ b/test/codegen/arithmetic.go @@ -227,3 +227,16 @@ func MULA(a, b, c uint32) (uint32, uint32, uint32) { r2 := b*64 + c return r0, r1, r2 } + +func MULS(a, b, c uint32) (uint32, uint32, uint32) { + // arm/7:`MULS`,-`MUL\s` + // arm64:`MSUBW`,-`MULW` + r0 := c - a*b + // arm/7:`MULS`-`MUL\s` + // arm64:`MSUBW`,-`MULW` + r1 := a - c*79 + // arm/7:`SUB`,-`MULS`-`MUL\s` + // arm64:`SUB`,-`MSUBW`,-`MULW` + r2 := c - b*64 + return r0, r1, r2 +} From 85066acca144625e239294e2ce07bb2cfbc800c2 Mon Sep 17 00:00:00 2001 From: OlgaVlPetrova Date: Sat, 13 Oct 2018 14:53:45 +0300 Subject: [PATCH 126/240] src/cmd/compile/internal/ssa: replace `s = s + x' => 's += x'. Change-Id: I1f399a8a0aa200bfda01f97f920b1345e59956ba Reviewed-on: https://go-review.googlesource.com/c/142057 Run-TryBot: Iskander Sharipov TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/cmd/compile/internal/ssa/sparsetree.go | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/cmd/compile/internal/ssa/sparsetree.go b/src/cmd/compile/internal/ssa/sparsetree.go index f7af85446b..546da8348d 100644 --- a/src/cmd/compile/internal/ssa/sparsetree.go +++ b/src/cmd/compile/internal/ssa/sparsetree.go @@ -98,9 +98,9 @@ func (t SparseTree) treestructure1(b *Block, i int) string { s := "\n" + strings.Repeat("\t", i) + b.String() + "->[" for i, e := range b.Succs { if i > 0 { - s = s + "," + s += "," } - s = s + e.b.String() + s += e.b.String() } s += "]" if c0 := t[b.ID].child; c0 != nil { From e47c11d8b1bc26ce3283df6bc04f8ca4cf1b074b Mon Sep 17 00:00:00 2001 From: Ivan Sharavuev Date: Sat, 13 Oct 2018 13:25:20 +0300 Subject: [PATCH 127/240] pprof: replace bits = bits + "..." to bits += "..." where bits is a string. Change-Id: Ic77ebbdf2670b7fdf2c381cd1ba768624b07e57c Reviewed-on: https://go-review.googlesource.com/c/141998 Run-TryBot: Iskander Sharipov TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/runtime/pprof/internal/profile/profile.go | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/src/runtime/pprof/internal/profile/profile.go b/src/runtime/pprof/internal/profile/profile.go index 863bd403a4..84e607e9a8 100644 --- a/src/runtime/pprof/internal/profile/profile.go +++ b/src/runtime/pprof/internal/profile/profile.go @@ -415,16 +415,16 @@ func (p *Profile) String() string { for _, m := range p.Mapping { bits := "" if m.HasFunctions { - bits = bits + "[FN]" + bits += "[FN]" } if m.HasFilenames { - bits = bits + "[FL]" + bits += "[FL]" } if m.HasLineNumbers { - bits = bits + "[LN]" + bits += "[LN]" } if m.HasInlineFrames { - bits = bits + "[IN]" + bits += "[IN]" } ss = append(ss, fmt.Sprintf("%d: %#x/%#x/%#x %s %s %s", m.ID, From 9322b53396dc8aeb8bdfa825beb4d89f33216d93 Mon Sep 17 00:00:00 2001 From: avsharapov Date: Sat, 13 Oct 2018 13:51:16 +0300 Subject: [PATCH 128/240] cmd/cgo: simplify switch statement to if statement Change-Id: Ie7dce45d554fde69d682680f55abba6a7fc55036 Reviewed-on: https://go-review.googlesource.com/c/142017 Reviewed-by: Ian Lance Taylor --- src/cmd/cgo/gcc.go | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/src/cmd/cgo/gcc.go b/src/cmd/cgo/gcc.go index 019ee64c8e..3058fc5f34 100644 --- a/src/cmd/cgo/gcc.go +++ b/src/cmd/cgo/gcc.go @@ -1026,8 +1026,7 @@ func (p *Package) hasSideEffects(f *File, x ast.Expr) bool { found := false f.walk(x, ctxExpr, func(f *File, x interface{}, context astContext) { - switch x.(type) { - case *ast.CallExpr: + if _, ok := x.(*ast.CallExpr); ok { found = true } }) @@ -1276,8 +1275,7 @@ func (p *Package) rewriteRef(f *File) { // in case expression being replaced is first on line. // See golang.org/issue/6563. pos := (*r.Expr).Pos() - switch x := expr.(type) { - case *ast.Ident: + if x, ok := expr.(*ast.Ident); ok { expr = &ast.Ident{NamePos: pos, Name: x.Name} } From d6e80069f3007d5bc03750f0a83e213bbac8c86e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Sun, 21 Jan 2018 13:02:27 +0100 Subject: [PATCH 129/240] cmd/compile: simplify as2 method of *Order MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Merge the two for loops that set up the node lists for temporaries into one for loop. Passes toolstash -cmp Change-Id: Ibc739115f38c8869b0dcfbf9819fdc2fc96962e0 Reviewed-on: https://go-review.googlesource.com/c/141819 Reviewed-by: Keith Randall Run-TryBot: Martin Möhrmann TryBot-Result: Gobot Gobot --- src/cmd/compile/internal/gc/order.go | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/src/cmd/compile/internal/gc/order.go b/src/cmd/compile/internal/gc/order.go index 519fad4b7e..f33689298f 100644 --- a/src/cmd/compile/internal/gc/order.go +++ b/src/cmd/compile/internal/gc/order.go @@ -1253,9 +1253,10 @@ func okas(ok, val *Node) *Node { func (o *Order) as2(n *Node) { tmplist := []*Node{} left := []*Node{} - for _, l := range n.List.Slice() { + for ni, l := range n.List.Slice() { if !l.isBlank() { tmp := o.newTemp(l.Type, types.Haspointers(l.Type)) + n.List.SetIndex(ni, tmp) tmplist = append(tmplist, tmp) left = append(left, l) } @@ -1268,14 +1269,6 @@ func (o *Order) as2(n *Node) { as.Rlist.Set(tmplist) as = typecheck(as, Etop) o.stmt(as) - - ti := 0 - for ni, l := range n.List.Slice() { - if !l.isBlank() { - n.List.SetIndex(ni, tmplist[ti]) - ti++ - } - } } // okAs2 orders OAS2 with ok. From bb3bf5bb538df67d3939974854c99608be21e135 Mon Sep 17 00:00:00 2001 From: Akhil Indurti Date: Thu, 26 Jul 2018 23:46:38 -0400 Subject: [PATCH 130/240] internal/cpu: expose ARM feature flags for FMA MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This change exposes feature flags needed to implement an FMA intrinsic on ARM CPUs via auxv's HWCAP bits. Specifically, it exposes HasVFPv4 to detect if an ARM processor has the fourth version of the vector floating point unit. The relevant instruction for this CL is VFMA, emitted in Go as FMULAD. Updates #26630. Change-Id: Ibbc04fb24c2b4d994f93762360f1a37bc6d83ff7 Reviewed-on: https://go-review.googlesource.com/c/126315 Run-TryBot: Martin Möhrmann TryBot-Result: Gobot Gobot Reviewed-by: Martin Möhrmann --- src/internal/cpu/cpu.go | 1 + src/internal/cpu/cpu_arm.go | 3 +++ 2 files changed, 4 insertions(+) diff --git a/src/internal/cpu/cpu.go b/src/internal/cpu/cpu.go index fdda880af4..1f3411cc72 100644 --- a/src/internal/cpu/cpu.go +++ b/src/internal/cpu/cpu.go @@ -76,6 +76,7 @@ var ARM arm // The struct is padded to avoid false sharing. type arm struct { _ CacheLinePad + HasVFPv4 bool HasIDIVA bool _ CacheLinePad } diff --git a/src/internal/cpu/cpu_arm.go b/src/internal/cpu/cpu_arm.go index 6a5b30580c..1c3e529190 100644 --- a/src/internal/cpu/cpu_arm.go +++ b/src/internal/cpu/cpu_arm.go @@ -15,15 +15,18 @@ var HWCap2 uint // HWCAP/HWCAP2 bits. These are exposed by Linux and FreeBSD. const ( + hwcap_VFPv4 = 1 << 16 hwcap_IDIVA = 1 << 17 ) func doinit() { options = []option{ + {"vfpv4", &ARM.HasVFPv4}, {"idiva", &ARM.HasIDIVA}, } // HWCAP feature bits + ARM.HasVFPv4 = isSet(HWCap, hwcap_VFPv4) ARM.HasIDIVA = isSet(HWCap, hwcap_IDIVA) } From 93e27e01af8bd6ac76c9784165d63b7cafe10a16 Mon Sep 17 00:00:00 2001 From: Ben Shi Date: Mon, 15 Oct 2018 05:39:23 +0000 Subject: [PATCH 131/240] test/codegen: add tests of FMA for arm/arm64 This CL adds tests of fused multiplication-accumulation on arm/arm64. Change-Id: Ic85d5277c0d6acb7e1e723653372dfaf96824a39 Reviewed-on: https://go-review.googlesource.com/c/141652 Run-TryBot: Ben Shi TryBot-Result: Gobot Gobot Reviewed-by: Cherry Zhang --- test/codegen/floats.go | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/test/codegen/floats.go b/test/codegen/floats.go index 4e4f87d574..847959c42e 100644 --- a/test/codegen/floats.go +++ b/test/codegen/floats.go @@ -72,27 +72,43 @@ func indexStore(b0 []float64, b1 float64, idx int) { func FusedAdd32(x, y, z float32) float32 { // s390x:"FMADDS\t" // ppc64le:"FMADDS\t" + // arm/7:"MULAF" + // arm64:"FMADDS" return x*y + z } -func FusedSub32(x, y, z float32) float32 { +func FusedSub32_a(x, y, z float32) float32 { // s390x:"FMSUBS\t" // ppc64le:"FMSUBS\t" return x*y - z } +func FusedSub32_b(x, y, z float32) float32 { + // arm/7:"MULSF" + // arm64:"FMSUBS" + return z - x*y +} + func FusedAdd64(x, y, z float64) float64 { // s390x:"FMADD\t" // ppc64le:"FMADD\t" + // arm/7:"MULAD" + // arm64:"FMADDD" return x*y + z } -func FusedSub64(x, y, z float64) float64 { +func FusedSub64_a(x, y, z float64) float64 { // s390x:"FMSUB\t" // ppc64le:"FMSUB\t" return x*y - z } +func FusedSub64_b(x, y, z float64) float64 { + // arm/7:"MULSD" + // arm64:"FMSUBD" + return z - x*y +} + // ---------------- // // Non-floats // // ---------------- // From 296b7aeae0b3231f2e943859b37108e5f9e130d3 Mon Sep 17 00:00:00 2001 From: Keith Randall Date: Sun, 14 Oct 2018 12:07:45 -0700 Subject: [PATCH 132/240] cmd/compile: fix gdb stepping test Not sure why this changed behavior, but seems mostly harmless. Fixes #28198 Change-Id: Ie25c6e1fcb64912a582c7ae7bf92c4c1642e83cb Reviewed-on: https://go-review.googlesource.com/c/141649 Reviewed-by: David Chase --- src/cmd/compile/internal/ssa/testdata/hist.gdb-opt.nexts | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/cmd/compile/internal/ssa/testdata/hist.gdb-opt.nexts b/src/cmd/compile/internal/ssa/testdata/hist.gdb-opt.nexts index 6586f243e2..b2f3216707 100644 --- a/src/cmd/compile/internal/ssa/testdata/hist.gdb-opt.nexts +++ b/src/cmd/compile/internal/ssa/testdata/hist.gdb-opt.nexts @@ -120,6 +120,7 @@ t = 0 a = 3 n = 0 t = 0 +92: fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t) 91: n += a 90: t += i * a 92: fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t) @@ -128,6 +129,7 @@ t = 0 a = 3 n = 3 t = 3 +92: fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t) 91: n += a 90: t += i * a 92: fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t) @@ -141,6 +143,7 @@ t = 9 a = 2 n = 6 t = 9 +92: fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t) 91: n += a 90: t += i * a 92: fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t) @@ -149,6 +152,7 @@ t = 9 a = 1 n = 8 t = 17 +92: fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t) 91: n += a 90: t += i * a 92: fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t) From 63e964e1741277c4da004e366111243f9ec942a2 Mon Sep 17 00:00:00 2001 From: Keith Randall Date: Sat, 6 Oct 2018 14:31:08 -0700 Subject: [PATCH 133/240] cmd/compile: provide types for all order-allocated temporaries Ensure that we correctly type the stack temps for regular closures, method function closures, and slice literals. Then we don't need to override the dummy types later. Furthermore, this allows order to reuse temporaries of these types. OARRAYLIT doesn't need a temporary as far as I can tell, so I removed that case from order. Change-Id: Ic58520fa50c90639393ff78f33d3c831d5c4acb9 Reviewed-on: https://go-review.googlesource.com/c/140306 Reviewed-by: Cherry Zhang --- src/cmd/compile/internal/gc/closure.go | 72 +++++++++++++++----------- src/cmd/compile/internal/gc/order.go | 19 +++---- test/live.go | 17 ++++-- 3 files changed, 66 insertions(+), 42 deletions(-) diff --git a/src/cmd/compile/internal/gc/closure.go b/src/cmd/compile/internal/gc/closure.go index 834cdc41eb..dcea567a14 100644 --- a/src/cmd/compile/internal/gc/closure.go +++ b/src/cmd/compile/internal/gc/closure.go @@ -337,18 +337,10 @@ func closuredebugruntimecheck(clo *Node) { } } -func walkclosure(clo *Node, init *Nodes) *Node { - xfunc := clo.Func.Closure - - // If no closure vars, don't bother wrapping. - if hasemptycvars(clo) { - if Debug_closure > 0 { - Warnl(clo.Pos, "closure converted to global") - } - return xfunc.Func.Nname - } - closuredebugruntimecheck(clo) - +// closureType returns the struct type used to hold all the information +// needed in the closure for clo (clo must be a OCLOSURE node). +// The address of a variable of the returned type can be cast to a func. +func closureType(clo *Node) *types.Type { // Create closure in the form of a composite literal. // supposing the closure captures an int i and a string s // and has one float64 argument and no results, @@ -362,11 +354,10 @@ func walkclosure(clo *Node, init *Nodes) *Node { // The information appears in the binary in the form of type descriptors; // the struct is unnamed so that closures in multiple packages with the // same struct type can share the descriptor. - fields := []*Node{ namedfield(".F", types.Types[TUINTPTR]), } - for _, v := range xfunc.Func.Cvars.Slice() { + for _, v := range clo.Func.Closure.Func.Cvars.Slice() { typ := v.Type if !v.Name.Byval() { typ = types.NewPtr(typ) @@ -375,6 +366,22 @@ func walkclosure(clo *Node, init *Nodes) *Node { } typ := tostruct(fields) typ.SetNoalg(true) + return typ +} + +func walkclosure(clo *Node, init *Nodes) *Node { + xfunc := clo.Func.Closure + + // If no closure vars, don't bother wrapping. + if hasemptycvars(clo) { + if Debug_closure > 0 { + Warnl(clo.Pos, "closure converted to global") + } + return xfunc.Func.Nname + } + closuredebugruntimecheck(clo) + + typ := closureType(clo) clos := nod(OCOMPLIT, nil, nod(OIND, typenod(typ), nil)) clos.Esc = clo.Esc @@ -389,10 +396,10 @@ func walkclosure(clo *Node, init *Nodes) *Node { clos.Left.Esc = clo.Esc // non-escaping temp to use, if any. - // orderexpr did not compute the type; fill it in now. if x := prealloc[clo]; x != nil { - x.Type = clos.Left.Left.Type - x.Orig.Type = x.Type + if !eqtype(typ, x.Type) { + panic("closure type does not match order's assigned type") + } clos.Left.Right = x delete(prealloc, clo) } @@ -479,6 +486,18 @@ func makepartialcall(fn *Node, t0 *types.Type, meth *types.Sym) *Node { return xfunc } +// partialCallType returns the struct type used to hold all the information +// needed in the closure for n (n must be a OCALLPART node). +// The address of a variable of the returned type can be cast to a func. +func partialCallType(n *Node) *types.Type { + t := tostruct([]*Node{ + namedfield("F", types.Types[TUINTPTR]), + namedfield("R", n.Left.Type), + }) + t.SetNoalg(true) + return t +} + func walkpartialcall(n *Node, init *Nodes) *Node { // Create closure in the form of a composite literal. // For x.M with receiver (x) type T, the generated code looks like: @@ -495,30 +514,25 @@ func walkpartialcall(n *Node, init *Nodes) *Node { checknil(n.Left, init) } - typ := tostruct([]*Node{ - namedfield("F", types.Types[TUINTPTR]), - namedfield("R", n.Left.Type), - }) - typ.SetNoalg(true) + typ := partialCallType(n) clos := nod(OCOMPLIT, nil, nod(OIND, typenod(typ), nil)) clos.Esc = n.Esc clos.Right.SetImplicit(true) - clos.List.Set1(nod(OCFUNC, n.Func.Nname, nil)) - clos.List.Append(n.Left) + clos.List.Set2(nod(OCFUNC, n.Func.Nname, nil), n.Left) // Force type conversion from *struct to the func type. clos = convnop(clos, n.Type) - // typecheck will insert a PTRLIT node under CONVNOP, - // tag it with escape analysis result. + // The typecheck inside convnop will insert a PTRLIT node under CONVNOP. + // Tag it with escape analysis result. clos.Left.Esc = n.Esc // non-escaping temp to use, if any. - // orderexpr did not compute the type; fill it in now. if x := prealloc[n]; x != nil { - x.Type = clos.Left.Left.Type - x.Orig.Type = x.Type + if !eqtype(typ, x.Type) { + panic("partial call type does not match order's assigned type") + } clos.Left.Right = x delete(prealloc, n) } diff --git a/src/cmd/compile/internal/gc/order.go b/src/cmd/compile/internal/gc/order.go index f33689298f..694f8fbd34 100644 --- a/src/cmd/compile/internal/gc/order.go +++ b/src/cmd/compile/internal/gc/order.go @@ -244,12 +244,6 @@ func (o *Order) markTemp() ordermarker { // which must have been returned by marktemp. func (o *Order) popTemp(mark ordermarker) { for _, n := range o.temp[mark:] { - if n.Type.Etype == types.TUINT8 { - // Don't recycle temps of this type. TUINT8 is used - // as a placeholder for a type to be determined later. - // TODO: fix - continue - } key := n.Type.LongString() o.free[key] = append(o.free[key], n) } @@ -1170,16 +1164,23 @@ func (o *Order) expr(n, lhs *Node) *Node { case OCLOSURE: if n.Noescape() && n.Func.Closure.Func.Cvars.Len() > 0 { - prealloc[n] = o.newTemp(types.Types[TUINT8], false) // walk will fill in correct type + prealloc[n] = o.newTemp(closureType(n), false) } - case OARRAYLIT, OSLICELIT, OCALLPART: + case OSLICELIT, OCALLPART: n.Left = o.expr(n.Left, nil) n.Right = o.expr(n.Right, nil) o.exprList(n.List) o.exprList(n.Rlist) if n.Noescape() { - prealloc[n] = o.newTemp(types.Types[TUINT8], false) // walk will fill in correct type + var t *types.Type + switch n.Op { + case OSLICELIT: + t = types.NewArray(n.Type.Elem(), n.Right.Int64()) + case OCALLPART: + t = partialCallType(n) + } + prealloc[n] = o.newTemp(t, false) } case ODDDARG: diff --git a/test/live.go b/test/live.go index 6367cab96f..a508947afc 100644 --- a/test/live.go +++ b/test/live.go @@ -404,8 +404,8 @@ func f27(b bool) { if b { call27(func() { x++ }) // ERROR "stack object .autotmp_[0-9]+ struct \{" } - call27(func() { x++ }) // ERROR "stack object .autotmp_[0-9]+ struct \{" - call27(func() { x++ }) // ERROR "stack object .autotmp_[0-9]+ struct \{" + call27(func() { x++ }) + call27(func() { x++ }) printnl() } @@ -521,8 +521,8 @@ func f32(b bool) { if b { call32(t32.Inc) // ERROR "stack object .autotmp_[0-9]+ struct \{" } - call32(t32.Inc) // ERROR "stack object .autotmp_[0-9]+ struct \{" - call32(t32.Inc) // ERROR "stack object .autotmp_[0-9]+ struct \{" + call32(t32.Inc) + call32(t32.Inc) } //go:noescape @@ -694,3 +694,12 @@ func f41(p, q *int) (r *int) { // ERROR "live at entry to f41: p q$" r = q return // ERROR "live at call to deferreturn: r$" } + +func f42() { + var p, q, r int + f43([]*int{&p,&q,&r}) // ERROR "stack object .autotmp_[0-9]+ \[3\]\*int$" + f43([]*int{&p,&r,&q}) + f43([]*int{&q,&p,&r}) +} +//go:noescape +func f43(a []*int) From a55f3ee46dda090131afba3018856e19bd0f426d Mon Sep 17 00:00:00 2001 From: Josh Bleecher Snyder Date: Sun, 27 May 2018 09:03:45 -0700 Subject: [PATCH 134/240] cmd/compile: fuse before branchelim MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The branchelim pass works better after fuse. Running fuse before branchelim also increases the stability of generated code amidst other compiler changes, which was the original motivation behind this change. The fuse pass is not cheap enough to run in its entirety before branchelim, but the most important half of it is. This change makes it possible to run "plain fuse" independently and does so before branchelim. During make.bash, elimIf occurrences increase from 4244 to 4288 (1%), and elimIfElse occurrences increase from 989 to 1079 (9%). Toolspeed impact is marginal; plain fuse pays for itself. name old time/op new time/op delta Template 189ms ± 2% 189ms ± 2% ~ (p=0.890 n=45+46) Unicode 93.2ms ± 5% 93.4ms ± 7% ~ (p=0.790 n=48+48) GoTypes 662ms ± 4% 660ms ± 4% ~ (p=0.186 n=48+49) Compiler 2.89s ± 4% 2.91s ± 3% +0.89% (p=0.050 n=49+44) SSA 8.23s ± 2% 8.21s ± 1% ~ (p=0.165 n=46+44) Flate 123ms ± 4% 123ms ± 3% +0.58% (p=0.031 n=47+49) GoParser 154ms ± 4% 154ms ± 4% ~ (p=0.492 n=49+48) Reflect 430ms ± 4% 429ms ± 4% ~ (p=1.000 n=48+48) Tar 171ms ± 3% 170ms ± 4% ~ (p=0.122 n=48+48) XML 232ms ± 3% 232ms ± 2% ~ (p=0.850 n=46+49) [Geo mean] 394ms 394ms +0.02% name old user-time/op new user-time/op delta Template 236ms ± 5% 236ms ± 4% ~ (p=0.934 n=50+50) Unicode 132ms ± 7% 130ms ± 9% ~ (p=0.087 n=50+50) GoTypes 861ms ± 3% 867ms ± 4% ~ (p=0.124 n=48+50) Compiler 3.93s ± 4% 3.94s ± 3% ~ (p=0.584 n=49+44) SSA 12.2s ± 2% 12.3s ± 1% ~ (p=0.610 n=46+45) Flate 149ms ± 4% 150ms ± 4% ~ (p=0.194 n=48+49) GoParser 193ms ± 5% 191ms ± 6% ~ (p=0.239 n=49+50) Reflect 553ms ± 5% 556ms ± 5% ~ (p=0.091 n=49+49) Tar 218ms ± 5% 218ms ± 5% ~ (p=0.359 n=49+50) XML 299ms ± 5% 298ms ± 4% ~ (p=0.482 n=50+49) [Geo mean] 516ms 516ms -0.01% name old alloc/op new alloc/op delta Template 36.3MB ± 0% 36.3MB ± 0% -0.02% (p=0.000 n=49+49) Unicode 29.7MB ± 0% 29.7MB ± 0% ~ (p=0.270 n=50+50) GoTypes 126MB ± 0% 126MB ± 0% -0.34% (p=0.000 n=50+49) Compiler 534MB ± 0% 531MB ± 0% -0.50% (p=0.000 n=50+50) SSA 1.98GB ± 0% 1.98GB ± 0% -0.06% (p=0.000 n=49+49) Flate 24.6MB ± 0% 24.6MB ± 0% -0.29% (p=0.000 n=50+50) GoParser 29.5MB ± 0% 29.4MB ± 0% -0.15% (p=0.000 n=49+50) Reflect 87.3MB ± 0% 87.2MB ± 0% -0.13% (p=0.000 n=49+50) Tar 35.6MB ± 0% 35.5MB ± 0% -0.17% (p=0.000 n=50+50) XML 48.2MB ± 0% 48.0MB ± 0% -0.30% (p=0.000 n=48+50) [Geo mean] 83.1MB 82.9MB -0.20% name old allocs/op new allocs/op delta Template 352k ± 0% 352k ± 0% -0.01% (p=0.004 n=49+49) Unicode 341k ± 0% 341k ± 0% ~ (p=0.341 n=48+50) GoTypes 1.28M ± 0% 1.28M ± 0% -0.03% (p=0.000 n=50+49) Compiler 4.96M ± 0% 4.96M ± 0% -0.05% (p=0.000 n=50+49) SSA 15.5M ± 0% 15.5M ± 0% -0.01% (p=0.000 n=50+49) Flate 233k ± 0% 233k ± 0% +0.01% (p=0.032 n=49+49) GoParser 294k ± 0% 294k ± 0% ~ (p=0.052 n=46+48) Reflect 1.04M ± 0% 1.04M ± 0% ~ (p=0.171 n=50+47) Tar 343k ± 0% 343k ± 0% -0.03% (p=0.000 n=50+50) XML 429k ± 0% 429k ± 0% -0.04% (p=0.000 n=50+50) [Geo mean] 812k 812k -0.02% Object files grow slightly; branchelim often increases binary size, at least on amd64. name old object-bytes new object-bytes delta Template 509kB ± 0% 509kB ± 0% -0.01% (p=0.008 n=5+5) Unicode 224kB ± 0% 224kB ± 0% ~ (all equal) GoTypes 1.84MB ± 0% 1.84MB ± 0% +0.00% (p=0.008 n=5+5) Compiler 6.71MB ± 0% 6.71MB ± 0% +0.01% (p=0.008 n=5+5) SSA 21.2MB ± 0% 21.2MB ± 0% +0.01% (p=0.008 n=5+5) Flate 324kB ± 0% 324kB ± 0% -0.00% (p=0.008 n=5+5) GoParser 404kB ± 0% 404kB ± 0% -0.02% (p=0.008 n=5+5) Reflect 1.40MB ± 0% 1.40MB ± 0% +0.09% (p=0.008 n=5+5) Tar 452kB ± 0% 452kB ± 0% +0.06% (p=0.008 n=5+5) XML 596kB ± 0% 596kB ± 0% +0.00% (p=0.008 n=5+5) [Geo mean] 1.04MB 1.04MB +0.01% Change-Id: I535c711b85380ff657fc0f022bebd9cb14ddd07f Reviewed-on: https://go-review.googlesource.com/c/129378 Run-TryBot: Josh Bleecher Snyder TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/cmd/compile/internal/ssa/compile.go | 3 ++- src/cmd/compile/internal/ssa/fuse.go | 24 ++++++++++++++++--- src/cmd/compile/internal/ssa/fuse_test.go | 10 ++++---- src/cmd/compile/internal/ssa/nilcheck_test.go | 18 +++++++------- 4 files changed, 37 insertions(+), 18 deletions(-) diff --git a/src/cmd/compile/internal/ssa/compile.go b/src/cmd/compile/internal/ssa/compile.go index 8b5d6d94e8..7f933cb66e 100644 --- a/src/cmd/compile/internal/ssa/compile.go +++ b/src/cmd/compile/internal/ssa/compile.go @@ -373,6 +373,7 @@ var passes = [...]pass{ {name: "phiopt", fn: phiopt}, {name: "nilcheckelim", fn: nilcheckelim}, {name: "prove", fn: prove}, + {name: "fuse plain", fn: fusePlain}, {name: "decompose builtin", fn: decomposeBuiltIn, required: true}, {name: "softfloat", fn: softfloat, required: true}, {name: "late opt", fn: opt, required: true}, // TODO: split required rules and optimizing rules @@ -380,7 +381,7 @@ var passes = [...]pass{ {name: "generic deadcode", fn: deadcode, required: true}, // remove dead stores, which otherwise mess up store chain {name: "check bce", fn: checkbce}, {name: "branchelim", fn: branchelim}, - {name: "fuse", fn: fuse}, + {name: "fuse", fn: fuseAll}, {name: "dse", fn: dse}, {name: "writebarrier", fn: writebarrier, required: true}, // expand write barrier ops {name: "insert resched checks", fn: insertLoopReschedChecks, diff --git a/src/cmd/compile/internal/ssa/fuse.go b/src/cmd/compile/internal/ssa/fuse.go index 4f9a2ad9ca..c451904124 100644 --- a/src/cmd/compile/internal/ssa/fuse.go +++ b/src/cmd/compile/internal/ssa/fuse.go @@ -8,15 +8,33 @@ import ( "cmd/internal/src" ) +// fusePlain runs fuse(f, fuseTypePlain). +func fusePlain(f *Func) { fuse(f, fuseTypePlain) } + +// fuseAll runs fuse(f, fuseTypeAll). +func fuseAll(f *Func) { fuse(f, fuseTypeAll) } + +type fuseType uint8 + +const ( + fuseTypePlain fuseType = 1 << iota + fuseTypeIf + fuseTypeAll = fuseTypePlain | fuseTypeIf +) + // fuse simplifies control flow by joining basic blocks. -func fuse(f *Func) { +func fuse(f *Func, typ fuseType) { for changed := true; changed; { changed = false // Fuse from end to beginning, to avoid quadratic behavior in fuseBlockPlain. See issue 13554. for i := len(f.Blocks) - 1; i >= 0; i-- { b := f.Blocks[i] - changed = fuseBlockIf(b) || changed - changed = fuseBlockPlain(b) || changed + if typ&fuseTypeIf != 0 { + changed = fuseBlockIf(b) || changed + } + if typ&fuseTypePlain != 0 { + changed = fuseBlockPlain(b) || changed + } } } } diff --git a/src/cmd/compile/internal/ssa/fuse_test.go b/src/cmd/compile/internal/ssa/fuse_test.go index bba92f805e..c3e25a80c4 100644 --- a/src/cmd/compile/internal/ssa/fuse_test.go +++ b/src/cmd/compile/internal/ssa/fuse_test.go @@ -26,7 +26,7 @@ func TestFuseEliminatesOneBranch(t *testing.T) { Exit("mem"))) CheckFunc(fun.f) - fuse(fun.f) + fuseAll(fun.f) for _, b := range fun.f.Blocks { if b == fun.blocks["then"] && b.Kind != BlockInvalid { @@ -56,7 +56,7 @@ func TestFuseEliminatesBothBranches(t *testing.T) { Exit("mem"))) CheckFunc(fun.f) - fuse(fun.f) + fuseAll(fun.f) for _, b := range fun.f.Blocks { if b == fun.blocks["then"] && b.Kind != BlockInvalid { @@ -90,7 +90,7 @@ func TestFuseHandlesPhis(t *testing.T) { Exit("mem"))) CheckFunc(fun.f) - fuse(fun.f) + fuseAll(fun.f) for _, b := range fun.f.Blocks { if b == fun.blocks["then"] && b.Kind != BlockInvalid { @@ -122,7 +122,7 @@ func TestFuseEliminatesEmptyBlocks(t *testing.T) { )) CheckFunc(fun.f) - fuse(fun.f) + fuseAll(fun.f) for k, b := range fun.blocks { if k[:1] == "z" && b.Kind != BlockInvalid { @@ -162,7 +162,7 @@ func BenchmarkFuse(b *testing.B) { b.ResetTimer() for i := 0; i < b.N; i++ { fun := c.Fun("entry", blocks...) - fuse(fun.f) + fuseAll(fun.f) } }) } diff --git a/src/cmd/compile/internal/ssa/nilcheck_test.go b/src/cmd/compile/internal/ssa/nilcheck_test.go index 815c4a5047..b2f5cae088 100644 --- a/src/cmd/compile/internal/ssa/nilcheck_test.go +++ b/src/cmd/compile/internal/ssa/nilcheck_test.go @@ -87,7 +87,7 @@ func TestNilcheckSimple(t *testing.T) { nilcheckelim(fun.f) // clean up the removed nil check - fuse(fun.f) + fusePlain(fun.f) deadcode(fun.f) CheckFunc(fun.f) @@ -124,7 +124,7 @@ func TestNilcheckDomOrder(t *testing.T) { nilcheckelim(fun.f) // clean up the removed nil check - fuse(fun.f) + fusePlain(fun.f) deadcode(fun.f) CheckFunc(fun.f) @@ -157,7 +157,7 @@ func TestNilcheckAddr(t *testing.T) { nilcheckelim(fun.f) // clean up the removed nil check - fuse(fun.f) + fusePlain(fun.f) deadcode(fun.f) CheckFunc(fun.f) @@ -191,7 +191,7 @@ func TestNilcheckAddPtr(t *testing.T) { nilcheckelim(fun.f) // clean up the removed nil check - fuse(fun.f) + fusePlain(fun.f) deadcode(fun.f) CheckFunc(fun.f) @@ -235,7 +235,7 @@ func TestNilcheckPhi(t *testing.T) { nilcheckelim(fun.f) // clean up the removed nil check - fuse(fun.f) + fusePlain(fun.f) deadcode(fun.f) CheckFunc(fun.f) @@ -276,7 +276,7 @@ func TestNilcheckKeepRemove(t *testing.T) { nilcheckelim(fun.f) // clean up the removed nil check - fuse(fun.f) + fusePlain(fun.f) deadcode(fun.f) CheckFunc(fun.f) @@ -323,7 +323,7 @@ func TestNilcheckInFalseBranch(t *testing.T) { nilcheckelim(fun.f) // clean up the removed nil check - fuse(fun.f) + fusePlain(fun.f) deadcode(fun.f) CheckFunc(fun.f) @@ -374,7 +374,7 @@ func TestNilcheckUser(t *testing.T) { nilcheckelim(fun.f) // clean up the removed nil check - fuse(fun.f) + fusePlain(fun.f) deadcode(fun.f) CheckFunc(fun.f) @@ -418,7 +418,7 @@ func TestNilcheckBug(t *testing.T) { nilcheckelim(fun.f) // clean up the removed nil check - fuse(fun.f) + fusePlain(fun.f) deadcode(fun.f) CheckFunc(fun.f) From 7c96d87eda45c93bf7218b79bc8ba85a3a21b066 Mon Sep 17 00:00:00 2001 From: Alberto Donizetti Date: Fri, 12 Oct 2018 20:56:12 +0200 Subject: [PATCH 135/240] test/codegen: test ppc64 TrailingZeros, OnesCount codegen This change adds codegen tests for the intrinsification on ppc64 of the OnesCount{64,32,16,8}, and TrailingZeros{64,32,16,8} math/bits functions. Change-Id: Id3364921fbd18316850e15c8c71330c906187fdb Reviewed-on: https://go-review.googlesource.com/c/141897 Reviewed-by: Lynn Boger --- test/codegen/mathbits.go | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/test/codegen/mathbits.go b/test/codegen/mathbits.go index 9bb2254155..89a77d96f9 100644 --- a/test/codegen/mathbits.go +++ b/test/codegen/mathbits.go @@ -104,6 +104,7 @@ func OnesCount(n uint) int { // amd64:"POPCNTQ",".*support_popcnt" // arm64:"VCNT","VUADDLV" // s390x:"POPCNT" + // ppc64:"POPCNTD" return bits.OnesCount(n) } @@ -111,6 +112,7 @@ func OnesCount64(n uint64) int { // amd64:"POPCNTQ",".*support_popcnt" // arm64:"VCNT","VUADDLV" // s390x:"POPCNT" + // ppc64:"POPCNTD" return bits.OnesCount64(n) } @@ -118,6 +120,7 @@ func OnesCount32(n uint32) int { // amd64:"POPCNTL",".*support_popcnt" // arm64:"VCNT","VUADDLV" // s390x:"POPCNT" + // ppc64:"POPCNTW" return bits.OnesCount32(n) } @@ -125,11 +128,13 @@ func OnesCount16(n uint16) int { // amd64:"POPCNTL",".*support_popcnt" // arm64:"VCNT","VUADDLV" // s390x:"POPCNT" + // ppc64:"POPCNTW" return bits.OnesCount16(n) } func OnesCount8(n uint8) int { // s390x:"POPCNT" + // ppc64:"POPCNTB" return bits.OnesCount8(n) } @@ -224,24 +229,28 @@ func RotateLeftVariable32(n uint32, m int) uint32 { func TrailingZeros(n uint) int { // amd64:"BSFQ","MOVL\t\\$64","CMOVQEQ" // s390x:"FLOGR" + // ppc64:"ANDN","POPCNTD" return bits.TrailingZeros(n) } func TrailingZeros64(n uint64) int { // amd64:"BSFQ","MOVL\t\\$64","CMOVQEQ" // s390x:"FLOGR" + // ppc64:"ANDN","POPCNTD" return bits.TrailingZeros64(n) } func TrailingZeros32(n uint32) int { // amd64:"BTSQ\\t\\$32","BSFQ" // s390x:"FLOGR","MOVWZ" + // ppc64:"ANDN","POPCNTW" return bits.TrailingZeros32(n) } func TrailingZeros16(n uint16) int { // amd64:"BSFL","BTSL\\t\\$16" // s390x:"FLOGR","OR\t\\$65536" + // ppc64:"POPCNTD","OR\\t\\$65536" return bits.TrailingZeros16(n) } From 240a30da1b3f5d4d60640a09f135275e8fee8b92 Mon Sep 17 00:00:00 2001 From: Keith Randall Date: Mon, 15 Oct 2018 09:44:22 -0700 Subject: [PATCH 136/240] cmd/compile: check order temp has correct type Followon from CL 140306 Change-Id: Ic71033d2301105b15b60645d895a076107f44a2e Reviewed-on: https://go-review.googlesource.com/c/142178 Run-TryBot: Keith Randall TryBot-Result: Gobot Gobot Reviewed-by: Cherry Zhang --- src/cmd/compile/internal/gc/sinit.go | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/cmd/compile/internal/gc/sinit.go b/src/cmd/compile/internal/gc/sinit.go index d520f21e63..f24da70625 100644 --- a/src/cmd/compile/internal/gc/sinit.go +++ b/src/cmd/compile/internal/gc/sinit.go @@ -833,7 +833,9 @@ func slicelit(ctxt initContext, n *Node, var_ *Node, init *Nodes) { var a *Node if x := prealloc[n]; x != nil { // temp allocated during order.go for dddarg - x.Type = t + if !eqtype(t, x.Type) { + panic("dotdotdot base type does not match order's assigned type") + } if vstat == nil { a = nod(OAS, x, nil) From c9130cae9a9cd59178e842851f3f30b1d97ab0bd Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Sat, 27 Jan 2018 11:55:34 +0100 Subject: [PATCH 137/240] runtime/internal/math: add multiplication with overflow check MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This CL adds a new internal math package for use by the runtime. The new package exports a MulUintptr function with uintptr arguments a and b and returns uintptr(a*b) and whether the full-width product x*y does overflow the uintptr value range (uintptr(x*y) != x*y). Uses of MulUinptr in the runtime and intrinsics for performance will be added in followup CLs. Updates #21588 Change-Id: Ia5a02eeabc955249118e4edf68c67d9fc0858058 Reviewed-on: https://go-review.googlesource.com/c/91755 Run-TryBot: Martin Möhrmann TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/cmd/compile/internal/gc/inl_test.go | 3 ++ src/cmd/compile/internal/gc/racewalk.go | 10 ++++- src/go/build/deps_test.go | 3 +- src/runtime/internal/math/math.go | 19 +++++++++ src/runtime/internal/math/math_test.go | 51 +++++++++++++++++++++++++ 5 files changed, 84 insertions(+), 2 deletions(-) create mode 100644 src/runtime/internal/math/math.go create mode 100644 src/runtime/internal/math/math_test.go diff --git a/src/cmd/compile/internal/gc/inl_test.go b/src/cmd/compile/internal/gc/inl_test.go index a452f2ad29..3fc0fbed1d 100644 --- a/src/cmd/compile/internal/gc/inl_test.go +++ b/src/cmd/compile/internal/gc/inl_test.go @@ -96,6 +96,9 @@ func TestIntendedInlining(t *testing.T) { "(*puintptr).set", }, "runtime/internal/sys": {}, + "runtime/internal/math": { + "MulUintptr", + }, "bytes": { "(*Buffer).Bytes", "(*Buffer).Cap", diff --git a/src/cmd/compile/internal/gc/racewalk.go b/src/cmd/compile/internal/gc/racewalk.go index e8c7fb5b14..8a8b436a23 100644 --- a/src/cmd/compile/internal/gc/racewalk.go +++ b/src/cmd/compile/internal/gc/racewalk.go @@ -32,7 +32,15 @@ import ( // Do not instrument the following packages at all, // at best instrumentation would cause infinite recursion. -var omit_pkgs = []string{"runtime/internal/atomic", "runtime/internal/sys", "runtime", "runtime/race", "runtime/msan", "internal/cpu"} +var omit_pkgs = []string{ + "runtime/internal/atomic", + "runtime/internal/sys", + "runtime/internal/math", + "runtime", + "runtime/race", + "runtime/msan", + "internal/cpu", +} // Only insert racefuncenterfp/racefuncexit into the following packages. // Memory accesses in the packages are either uninteresting or will cause false positives. diff --git a/src/go/build/deps_test.go b/src/go/build/deps_test.go index 91617714f6..904759fe3b 100644 --- a/src/go/build/deps_test.go +++ b/src/go/build/deps_test.go @@ -36,9 +36,10 @@ var pkgDeps = map[string][]string{ // L0 is the lowest level, core, nearly unavoidable packages. "errors": {}, "io": {"errors", "sync", "sync/atomic"}, - "runtime": {"unsafe", "runtime/internal/atomic", "runtime/internal/sys", "internal/cpu", "internal/bytealg"}, + "runtime": {"unsafe", "runtime/internal/atomic", "runtime/internal/sys", "runtime/internal/math", "internal/cpu", "internal/bytealg"}, "runtime/internal/sys": {}, "runtime/internal/atomic": {"unsafe", "internal/cpu"}, + "runtime/internal/math": {"runtime/internal/sys"}, "internal/race": {"runtime", "unsafe"}, "sync": {"internal/race", "runtime", "sync/atomic", "unsafe"}, "sync/atomic": {"unsafe"}, diff --git a/src/runtime/internal/math/math.go b/src/runtime/internal/math/math.go new file mode 100644 index 0000000000..5385f5dd86 --- /dev/null +++ b/src/runtime/internal/math/math.go @@ -0,0 +1,19 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package math + +import "runtime/internal/sys" + +const MaxUintptr = ^uintptr(0) + +// MulUintptr returns a * b and whether the multiplication overflowed. +// On supported platforms this is an intrinsic lowered by the compiler. +func MulUintptr(a, b uintptr) (uintptr, bool) { + if a|b < 1<<(4*sys.PtrSize) || a == 0 { + return a * b, false + } + overflow := b > MaxUintptr/a + return a * b, overflow +} diff --git a/src/runtime/internal/math/math_test.go b/src/runtime/internal/math/math_test.go new file mode 100644 index 0000000000..9447bd23f9 --- /dev/null +++ b/src/runtime/internal/math/math_test.go @@ -0,0 +1,51 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package math_test + +import ( + . "runtime/internal/math" + "testing" +) + +const ( + UintptrSize = 32 << (^uintptr(0) >> 63) +) + +type mulUintptrTest struct { + a uintptr + b uintptr + overflow bool +} + +var mulUintptrTests = []mulUintptrTest{ + {0, 0, false}, + {1000, 1000, false}, + {MaxUintptr, 0, false}, + {MaxUintptr, 1, false}, + {MaxUintptr / 2, 2, false}, + {MaxUintptr / 2, 3, true}, + {MaxUintptr, 10, true}, + {MaxUintptr, 100, true}, + {MaxUintptr / 100, 100, false}, + {MaxUintptr / 1000, 1001, true}, + {1<<(UintptrSize/2) - 1, 1<<(UintptrSize/2) - 1, false}, + {1 << (UintptrSize / 2), 1 << (UintptrSize / 2), true}, + {MaxUintptr >> 32, MaxUintptr >> 32, false}, + {MaxUintptr, MaxUintptr, true}, +} + +func TestMulUintptr(t *testing.T) { + for _, test := range mulUintptrTests { + a, b := test.a, test.b + for i := 0; i < 2; i++ { + mul, overflow := MulUintptr(a, b) + if mul != a*b || overflow != test.overflow { + t.Errorf("MulUintptr(%v, %v) = %v, %v want %v, %v", + a, b, mul, overflow, a*b, test.overflow) + } + a, b = b, a + } + } +} From 9f66b41beea82cc613cad9138c10a50f2b3ea137 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Sat, 16 Jun 2018 01:22:07 +0200 Subject: [PATCH 138/240] cmd/compile: avoid implicit bounds checks after explicit checks for append MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The generated code for the append builtin already checks if the appended to slice is large enough and calls growslice if that is not the case. Trust that this ensures the slice is large enough and avoid the implicit bounds check when slicing the slice to its new size. Removes 365 panicslice calls (-14%) from the go binary which reduces the binary size by ~12kbyte. Change-Id: I1b88418675ff409bc0b956853c9e95241274d5a6 Reviewed-on: https://go-review.googlesource.com/c/119315 Run-TryBot: Martin Möhrmann TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/cmd/compile/internal/gc/ssa.go | 22 ++++++++++++---------- src/cmd/compile/internal/gc/walk.go | 3 +++ 2 files changed, 15 insertions(+), 10 deletions(-) diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go index 4a4461948c..ca1c7df9a0 100644 --- a/src/cmd/compile/internal/gc/ssa.go +++ b/src/cmd/compile/internal/gc/ssa.go @@ -2332,7 +2332,7 @@ func (s *state) expr(n *Node) *ssa.Value { if max != nil { k = s.extendIndex(s.expr(max), panicslice) } - p, l, c := s.slice(n.Left.Type, v, i, j, k) + p, l, c := s.slice(n.Left.Type, v, i, j, k, n.Bounded()) return s.newValue3(ssa.OpSliceMake, n.Type, p, l, c) case OSLICESTR: @@ -2345,7 +2345,7 @@ func (s *state) expr(n *Node) *ssa.Value { if high != nil { j = s.extendIndex(s.expr(high), panicslice) } - p, l, _ := s.slice(n.Left.Type, v, i, j, nil) + p, l, _ := s.slice(n.Left.Type, v, i, j, nil, n.Bounded()) return s.newValue2(ssa.OpStringMake, n.Type, p, l) case OCALLFUNC: @@ -4175,7 +4175,7 @@ func (s *state) storeTypePtrs(t *types.Type, left, right *ssa.Value) { // slice computes the slice v[i:j:k] and returns ptr, len, and cap of result. // i,j,k may be nil, in which case they are set to their default value. // t is a slice, ptr to array, or string type. -func (s *state) slice(t *types.Type, v, i, j, k *ssa.Value) (p, l, c *ssa.Value) { +func (s *state) slice(t *types.Type, v, i, j, k *ssa.Value, bounded bool) (p, l, c *ssa.Value) { var elemtype *types.Type var ptrtype *types.Type var ptr *ssa.Value @@ -4220,13 +4220,15 @@ func (s *state) slice(t *types.Type, v, i, j, k *ssa.Value) (p, l, c *ssa.Value) k = cap } - // Panic if slice indices are not in bounds. - s.sliceBoundsCheck(i, j) - if j != k { - s.sliceBoundsCheck(j, k) - } - if k != cap { - s.sliceBoundsCheck(k, cap) + if !bounded { + // Panic if slice indices are not in bounds. + s.sliceBoundsCheck(i, j) + if j != k { + s.sliceBoundsCheck(j, k) + } + if k != cap { + s.sliceBoundsCheck(k, cap) + } } // Generate the following code assuming that indexes are in bounds. diff --git a/src/cmd/compile/internal/gc/walk.go b/src/cmd/compile/internal/gc/walk.go index f7676310e9..9868a33ba9 100644 --- a/src/cmd/compile/internal/gc/walk.go +++ b/src/cmd/compile/internal/gc/walk.go @@ -2818,6 +2818,7 @@ func appendslice(n *Node, init *Nodes) *Node { // s = s[:n] nt := nod(OSLICE, s, nil) nt.SetSliceBounds(nil, nn, nil) + nt.SetBounded(true) nodes.Append(nod(OAS, s, nt)) var ncopy *Node @@ -2987,6 +2988,7 @@ func extendslice(n *Node, init *Nodes) *Node { // s = s[:n] nt := nod(OSLICE, s, nil) nt.SetSliceBounds(nil, nn, nil) + nt.SetBounded(true) nodes = append(nodes, nod(OAS, s, nt)) // lptr := &l1[0] @@ -3109,6 +3111,7 @@ func walkappend(n *Node, init *Nodes, dst *Node) *Node { nx = nod(OSLICE, ns, nil) // ...s[:n+argc] nx.SetSliceBounds(nil, nod(OADD, nn, na), nil) + nx.SetBounded(true) l = append(l, nod(OAS, ns, nx)) // s = s[:n+argc] ls = n.List.Slice()[1:] From a1ca4893ff755d6b0b3bf4b026196d55251ea846 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Sat, 27 Jan 2018 11:55:34 +0100 Subject: [PATCH 139/240] cmd/compile: add intrinsics for runtime/internal/math on 386 and amd64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add generic, 386 and amd64 specific ops and SSA rules for multiplication with overflow and branching based on overflow flags. Use these to intrinsify runtime/internal/math.MulUinptr. On amd64 mul, overflow := math.MulUintptr(a, b) if overflow { is lowered to two instructions: MULQ SI JO 0x10ee35c No codegen tests as codegen can not currently test unexported internal runtime functions. amd64: name old time/op new time/op delta MulUintptr/small 1.16ns ± 5% 0.88ns ± 6% -24.36% (p=0.000 n=19+20) MulUintptr/large 10.7ns ± 1% 1.1ns ± 1% -89.28% (p=0.000 n=17+19) Change-Id: If60739a86f820e5044d677276c21df90d3c7a86a Reviewed-on: https://go-review.googlesource.com/c/141820 Run-TryBot: Martin Möhrmann TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/cmd/compile/internal/amd64/ssa.go | 13 +- src/cmd/compile/internal/gc/ssa.go | 8 + src/cmd/compile/internal/ssa/gen/386.rules | 5 + src/cmd/compile/internal/ssa/gen/386Ops.go | 5 + src/cmd/compile/internal/ssa/gen/AMD64.rules | 6 + src/cmd/compile/internal/ssa/gen/AMD64Ops.go | 6 + .../compile/internal/ssa/gen/genericOps.go | 3 + src/cmd/compile/internal/ssa/opGen.go | 101 ++++++++++++ src/cmd/compile/internal/ssa/rewrite386.go | 123 ++++++++++++++ src/cmd/compile/internal/ssa/rewriteAMD64.go | 150 ++++++++++++++++++ src/cmd/compile/internal/x86/ssa.go | 13 +- src/runtime/internal/math/math_test.go | 28 ++++ 12 files changed, 459 insertions(+), 2 deletions(-) diff --git a/src/cmd/compile/internal/amd64/ssa.go b/src/cmd/compile/internal/amd64/ssa.go index f12e4cb5ec..5b776170d7 100644 --- a/src/cmd/compile/internal/amd64/ssa.go +++ b/src/cmd/compile/internal/amd64/ssa.go @@ -315,6 +315,13 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { m.To.Reg = x86.REG_DX } + case ssa.OpAMD64MULQU, ssa.OpAMD64MULLU: + // Arg[0] is already in AX as it's the only register we allow + // results lo in AX + p := s.Prog(v.Op.Asm()) + p.From.Type = obj.TYPE_REG + p.From.Reg = v.Args[1].Reg() + case ssa.OpAMD64MULQU2: // Arg[0] is already in AX as it's the only register we allow // results hi in DX, lo in AX @@ -979,7 +986,8 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { ssa.OpAMD64SETGF, ssa.OpAMD64SETGEF, ssa.OpAMD64SETB, ssa.OpAMD64SETBE, ssa.OpAMD64SETORD, ssa.OpAMD64SETNAN, - ssa.OpAMD64SETA, ssa.OpAMD64SETAE: + ssa.OpAMD64SETA, ssa.OpAMD64SETAE, + ssa.OpAMD64SETO: p := s.Prog(v.Op.Asm()) p.To.Type = obj.TYPE_REG p.To.Reg = v.Reg() @@ -1122,6 +1130,8 @@ var blockJump = [...]struct { ssa.BlockAMD64GE: {x86.AJGE, x86.AJLT}, ssa.BlockAMD64LE: {x86.AJLE, x86.AJGT}, ssa.BlockAMD64GT: {x86.AJGT, x86.AJLE}, + ssa.BlockAMD64OS: {x86.AJOS, x86.AJOC}, + ssa.BlockAMD64OC: {x86.AJOC, x86.AJOS}, ssa.BlockAMD64ULT: {x86.AJCS, x86.AJCC}, ssa.BlockAMD64UGE: {x86.AJCC, x86.AJCS}, ssa.BlockAMD64UGT: {x86.AJHI, x86.AJLS}, @@ -1183,6 +1193,7 @@ func ssaGenBlock(s *gc.SSAGenState, b, next *ssa.Block) { case ssa.BlockAMD64EQ, ssa.BlockAMD64NE, ssa.BlockAMD64LT, ssa.BlockAMD64GE, ssa.BlockAMD64LE, ssa.BlockAMD64GT, + ssa.BlockAMD64OS, ssa.BlockAMD64OC, ssa.BlockAMD64ULT, ssa.BlockAMD64UGT, ssa.BlockAMD64ULE, ssa.BlockAMD64UGE: jmp := blockJump[b.Kind] diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go index ca1c7df9a0..d3a30879db 100644 --- a/src/cmd/compile/internal/gc/ssa.go +++ b/src/cmd/compile/internal/gc/ssa.go @@ -2913,6 +2913,14 @@ func init() { }, all...) } + addF("runtime/internal/math", "MulUintptr", + func(s *state, n *Node, args []*ssa.Value) *ssa.Value { + if s.config.PtrSize == 4 { + return s.newValue2(ssa.OpMul32uover, types.NewTuple(types.Types[TUINT], types.Types[TUINT]), args[0], args[1]) + } + return s.newValue2(ssa.OpMul64uover, types.NewTuple(types.Types[TUINT], types.Types[TUINT]), args[0], args[1]) + }, + sys.AMD64, sys.I386) add("runtime", "KeepAlive", func(s *state, n *Node, args []*ssa.Value) *ssa.Value { data := s.newValue1(ssa.OpIData, s.f.Config.Types.BytePtr, args[0]) diff --git a/src/cmd/compile/internal/ssa/gen/386.rules b/src/cmd/compile/internal/ssa/gen/386.rules index 7a6797bb09..e8d19cf3c9 100644 --- a/src/cmd/compile/internal/ssa/gen/386.rules +++ b/src/cmd/compile/internal/ssa/gen/386.rules @@ -17,6 +17,9 @@ (Mul(32|64)F x y) -> (MULS(S|D) x y) (Mul32uhilo x y) -> (MULLQU x y) +(Select0 (Mul32uover x y)) -> (Select0 (MULLU x y)) +(Select1 (Mul32uover x y)) -> (SETO (Select1 (MULLU x y))) + (Avg32u x y) -> (AVGLU x y) (Div32F x y) -> (DIVSS x y) @@ -369,6 +372,7 @@ (If (SETBE cmp) yes no) -> (ULE cmp yes no) (If (SETA cmp) yes no) -> (UGT cmp yes no) (If (SETAE cmp) yes no) -> (UGE cmp yes no) +(If (SETO cmp) yes no) -> (OS cmp yes no) // Special case for floating point - LF/LEF not generated (If (SETGF cmp) yes no) -> (UGT cmp yes no) @@ -398,6 +402,7 @@ (NE (TESTB (SETBE cmp) (SETBE cmp)) yes no) -> (ULE cmp yes no) (NE (TESTB (SETA cmp) (SETA cmp)) yes no) -> (UGT cmp yes no) (NE (TESTB (SETAE cmp) (SETAE cmp)) yes no) -> (UGE cmp yes no) +(NE (TESTB (SETO cmp) (SETO cmp)) yes no) -> (OS cmp yes no) // Special case for floating point - LF/LEF not generated (NE (TESTB (SETGF cmp) (SETGF cmp)) yes no) -> (UGT cmp yes no) diff --git a/src/cmd/compile/internal/ssa/gen/386Ops.go b/src/cmd/compile/internal/ssa/gen/386Ops.go index f7e5f939ab..cb2919567f 100644 --- a/src/cmd/compile/internal/ssa/gen/386Ops.go +++ b/src/cmd/compile/internal/ssa/gen/386Ops.go @@ -207,6 +207,8 @@ func init() { {name: "MULL", argLength: 2, reg: gp21, asm: "IMULL", commutative: true, resultInArg0: true, clobberFlags: true}, // arg0 * arg1 {name: "MULLconst", argLength: 1, reg: gp11, asm: "IMUL3L", aux: "Int32", clobberFlags: true}, // arg0 * auxint + {name: "MULLU", argLength: 2, reg: regInfo{inputs: []regMask{ax, gpsp}, outputs: []regMask{ax, 0}, clobbers: dx}, typ: "(UInt32,Flags)", asm: "MULL", commutative: true, clobberFlags: true}, // Let x = arg0*arg1 (full 32x32->64 unsigned multiply). Returns uint32(x), and flags set to overflow if uint32(x) != x. + {name: "HMULL", argLength: 2, reg: gp21hmul, commutative: true, asm: "IMULL", clobberFlags: true}, // (arg0 * arg1) >> width {name: "HMULLU", argLength: 2, reg: gp21hmul, commutative: true, asm: "MULL", clobberFlags: true}, // (arg0 * arg1) >> width @@ -326,6 +328,7 @@ func init() { {name: "SETBE", argLength: 1, reg: readflags, asm: "SETLS"}, // extract unsigned <= condition from arg0 {name: "SETA", argLength: 1, reg: readflags, asm: "SETHI"}, // extract unsigned > condition from arg0 {name: "SETAE", argLength: 1, reg: readflags, asm: "SETCC"}, // extract unsigned >= condition from arg0 + {name: "SETO", argLength: 1, reg: readflags, asm: "SETOS"}, // extract if overflow flag is set from arg0 // Need different opcodes for floating point conditions because // any comparison involving a NaN is always FALSE and thus // the patterns for inverting conditions cannot be used. @@ -553,6 +556,8 @@ func init() { {name: "LE"}, {name: "GT"}, {name: "GE"}, + {name: "OS"}, + {name: "OC"}, {name: "ULT"}, {name: "ULE"}, {name: "UGT"}, diff --git a/src/cmd/compile/internal/ssa/gen/AMD64.rules b/src/cmd/compile/internal/ssa/gen/AMD64.rules index fa7f1438d6..adb94c3bfe 100644 --- a/src/cmd/compile/internal/ssa/gen/AMD64.rules +++ b/src/cmd/compile/internal/ssa/gen/AMD64.rules @@ -16,6 +16,10 @@ (Mul(64|32|16|8) x y) -> (MUL(Q|L|L|L) x y) (Mul(32|64)F x y) -> (MULS(S|D) x y) +(Select0 (Mul64uover x y)) -> (Select0 (MULQU x y)) +(Select0 (Mul32uover x y)) -> (Select0 (MULLU x y)) +(Select1 (Mul(64|32)uover x y)) -> (SETO (Select1 (MUL(Q|L)U x y))) + (Hmul(64|32) x y) -> (HMUL(Q|L) x y) (Hmul(64|32)u x y) -> (HMUL(Q|L)U x y) @@ -480,6 +484,7 @@ (If (SETBE cmp) yes no) -> (ULE cmp yes no) (If (SETA cmp) yes no) -> (UGT cmp yes no) (If (SETAE cmp) yes no) -> (UGE cmp yes no) +(If (SETO cmp) yes no) -> (OS cmp yes no) // Special case for floating point - LF/LEF not generated (If (SETGF cmp) yes no) -> (UGT cmp yes no) @@ -542,6 +547,7 @@ (NE (TESTB (SETBE cmp) (SETBE cmp)) yes no) -> (ULE cmp yes no) (NE (TESTB (SETA cmp) (SETA cmp)) yes no) -> (UGT cmp yes no) (NE (TESTB (SETAE cmp) (SETAE cmp)) yes no) -> (UGE cmp yes no) +(NE (TESTB (SETO cmp) (SETO cmp)) yes no) -> (OS cmp yes no) // Recognize bit tests: a&(1<64 unsigned multiply). Returns uint32(x), and flags set to overflow if uint32(x) != x. + {name: "MULQU", argLength: 2, reg: regInfo{inputs: []regMask{ax, gpsp}, outputs: []regMask{ax, 0}, clobbers: dx}, typ: "(UInt64,Flags)", asm: "MULQ", commutative: true, clobberFlags: true}, // Let x = arg0*arg1 (full 64x64->128 unsigned multiply). Returns uint64(x), and flags set to overflow if uint64(x) != x. + {name: "HMULQ", argLength: 2, reg: gp21hmul, commutative: true, asm: "IMULQ", clobberFlags: true}, // (arg0 * arg1) >> width {name: "HMULL", argLength: 2, reg: gp21hmul, commutative: true, asm: "IMULL", clobberFlags: true}, // (arg0 * arg1) >> width {name: "HMULQU", argLength: 2, reg: gp21hmul, commutative: true, asm: "MULQ", clobberFlags: true}, // (arg0 * arg1) >> width @@ -468,6 +471,7 @@ func init() { {name: "SETBE", argLength: 1, reg: readflags, asm: "SETLS"}, // extract unsigned <= condition from arg0 {name: "SETA", argLength: 1, reg: readflags, asm: "SETHI"}, // extract unsigned > condition from arg0 {name: "SETAE", argLength: 1, reg: readflags, asm: "SETCC"}, // extract unsigned >= condition from arg0 + {name: "SETO", argLength: 1, reg: readflags, asm: "SETOS"}, // extract if overflow flag is set from arg0 // Variants that store result to memory {name: "SETEQstore", argLength: 3, reg: gpstoreconst, asm: "SETEQ", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // extract == condition from arg1 to arg0+auxint+aux, arg2=mem {name: "SETNEstore", argLength: 3, reg: gpstoreconst, asm: "SETNE", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // extract != condition from arg1 to arg0+auxint+aux, arg2=mem @@ -754,6 +758,8 @@ func init() { {name: "LE"}, {name: "GT"}, {name: "GE"}, + {name: "OS"}, + {name: "OC"}, {name: "ULT"}, {name: "ULE"}, {name: "UGT"}, diff --git a/src/cmd/compile/internal/ssa/gen/genericOps.go b/src/cmd/compile/internal/ssa/gen/genericOps.go index ee9c6fa0f6..58f1b5bf79 100644 --- a/src/cmd/compile/internal/ssa/gen/genericOps.go +++ b/src/cmd/compile/internal/ssa/gen/genericOps.go @@ -55,6 +55,9 @@ var genericOps = []opData{ {name: "Mul32uhilo", argLength: 2, typ: "(UInt32,UInt32)", commutative: true}, // arg0 * arg1, returns (hi, lo) {name: "Mul64uhilo", argLength: 2, typ: "(UInt64,UInt64)", commutative: true}, // arg0 * arg1, returns (hi, lo) + {name: "Mul32uover", argLength: 2, typ: "(UInt32,Bool)", commutative: true}, // Let x = arg0*arg1 (full 32x32-> 64 unsigned multiply), returns (uint32(x), (uint32(x) != x)) + {name: "Mul64uover", argLength: 2, typ: "(UInt64,Bool)", commutative: true}, // Let x = arg0*arg1 (full 64x64->128 unsigned multiply), returns (uint64(x), (uint64(x) != x)) + // Weird special instructions for use in the strength reduction of divides. // These ops compute unsigned (arg0 + arg1) / 2, correct to all // 32/64 bits, even when the intermediate result of the add has 33/65 bits. diff --git a/src/cmd/compile/internal/ssa/opGen.go b/src/cmd/compile/internal/ssa/opGen.go index ae04e25798..082b6e1ba7 100644 --- a/src/cmd/compile/internal/ssa/opGen.go +++ b/src/cmd/compile/internal/ssa/opGen.go @@ -22,6 +22,8 @@ const ( Block386LE Block386GT Block386GE + Block386OS + Block386OC Block386ULT Block386ULE Block386UGT @@ -37,6 +39,8 @@ const ( BlockAMD64LE BlockAMD64GT BlockAMD64GE + BlockAMD64OS + BlockAMD64OC BlockAMD64ULT BlockAMD64ULE BlockAMD64UGT @@ -130,6 +134,8 @@ var blockString = [...]string{ Block386LE: "LE", Block386GT: "GT", Block386GE: "GE", + Block386OS: "OS", + Block386OC: "OC", Block386ULT: "ULT", Block386ULE: "ULE", Block386UGT: "UGT", @@ -145,6 +151,8 @@ var blockString = [...]string{ BlockAMD64LE: "LE", BlockAMD64GT: "GT", BlockAMD64GE: "GE", + BlockAMD64OS: "OS", + BlockAMD64OC: "OC", BlockAMD64ULT: "ULT", BlockAMD64ULE: "ULE", BlockAMD64UGT: "UGT", @@ -278,6 +286,7 @@ const ( Op386SBBLconst Op386MULL Op386MULLconst + Op386MULLU Op386HMULL Op386HMULLU Op386MULLQU @@ -364,6 +373,7 @@ const ( Op386SETBE Op386SETA Op386SETAE + Op386SETO Op386SETEQF Op386SETNEF Op386SETORD @@ -500,6 +510,8 @@ const ( OpAMD64MULL OpAMD64MULQconst OpAMD64MULLconst + OpAMD64MULLU + OpAMD64MULQU OpAMD64HMULQ OpAMD64HMULL OpAMD64HMULQU @@ -705,6 +717,7 @@ const ( OpAMD64SETBE OpAMD64SETA OpAMD64SETAE + OpAMD64SETO OpAMD64SETEQstore OpAMD64SETNEstore OpAMD64SETLstore @@ -2083,6 +2096,8 @@ const ( OpHmul64u OpMul32uhilo OpMul64uhilo + OpMul32uover + OpMul64uover OpAvg32u OpAvg64u OpDiv8 @@ -3114,6 +3129,24 @@ var opcodeTable = [...]opInfo{ }, }, }, + { + name: "MULLU", + argLen: 2, + commutative: true, + clobberFlags: true, + asm: x86.AMULL, + reg: regInfo{ + inputs: []inputInfo{ + {0, 1}, // AX + {1, 255}, // AX CX DX BX SP BP SI DI + }, + clobbers: 4, // DX + outputs: []outputInfo{ + {1, 0}, + {0, 1}, // AX + }, + }, + }, { name: "HMULL", argLen: 2, @@ -4378,6 +4411,16 @@ var opcodeTable = [...]opInfo{ }, }, }, + { + name: "SETO", + argLen: 1, + asm: x86.ASETOS, + reg: regInfo{ + outputs: []outputInfo{ + {0, 239}, // AX CX DX BX BP SI DI + }, + }, + }, { name: "SETEQF", argLen: 1, @@ -6271,6 +6314,42 @@ var opcodeTable = [...]opInfo{ }, }, }, + { + name: "MULLU", + argLen: 2, + commutative: true, + clobberFlags: true, + asm: x86.AMULL, + reg: regInfo{ + inputs: []inputInfo{ + {0, 1}, // AX + {1, 65535}, // AX CX DX BX SP BP SI DI R8 R9 R10 R11 R12 R13 R14 R15 + }, + clobbers: 4, // DX + outputs: []outputInfo{ + {1, 0}, + {0, 1}, // AX + }, + }, + }, + { + name: "MULQU", + argLen: 2, + commutative: true, + clobberFlags: true, + asm: x86.AMULQ, + reg: regInfo{ + inputs: []inputInfo{ + {0, 1}, // AX + {1, 65535}, // AX CX DX BX SP BP SI DI R8 R9 R10 R11 R12 R13 R14 R15 + }, + clobbers: 4, // DX + outputs: []outputInfo{ + {1, 0}, + {0, 1}, // AX + }, + }, + }, { name: "HMULQ", argLen: 2, @@ -9293,6 +9372,16 @@ var opcodeTable = [...]opInfo{ }, }, }, + { + name: "SETO", + argLen: 1, + asm: x86.ASETOS, + reg: regInfo{ + outputs: []outputInfo{ + {0, 65519}, // AX CX DX BX BP SI DI R8 R9 R10 R11 R12 R13 R14 R15 + }, + }, + }, { name: "SETEQstore", auxType: auxSymOff, @@ -27899,6 +27988,18 @@ var opcodeTable = [...]opInfo{ commutative: true, generic: true, }, + { + name: "Mul32uover", + argLen: 2, + commutative: true, + generic: true, + }, + { + name: "Mul64uover", + argLen: 2, + commutative: true, + generic: true, + }, { name: "Avg32u", argLen: 2, diff --git a/src/cmd/compile/internal/ssa/rewrite386.go b/src/cmd/compile/internal/ssa/rewrite386.go index 9b2ec74a9d..14784bef3a 100644 --- a/src/cmd/compile/internal/ssa/rewrite386.go +++ b/src/cmd/compile/internal/ssa/rewrite386.go @@ -637,6 +637,10 @@ func rewriteValue386(v *Value) bool { return rewriteValue386_OpRsh8x64_0(v) case OpRsh8x8: return rewriteValue386_OpRsh8x8_0(v) + case OpSelect0: + return rewriteValue386_OpSelect0_0(v) + case OpSelect1: + return rewriteValue386_OpSelect1_0(v) case OpSignExt16to32: return rewriteValue386_OpSignExt16to32_0(v) case OpSignExt8to16: @@ -23707,6 +23711,59 @@ func rewriteValue386_OpRsh8x8_0(v *Value) bool { return true } } +func rewriteValue386_OpSelect0_0(v *Value) bool { + b := v.Block + _ = b + typ := &b.Func.Config.Types + _ = typ + // match: (Select0 (Mul32uover x y)) + // cond: + // result: (Select0 (MULLU x y)) + for { + v_0 := v.Args[0] + if v_0.Op != OpMul32uover { + break + } + _ = v_0.Args[1] + x := v_0.Args[0] + y := v_0.Args[1] + v.reset(OpSelect0) + v.Type = typ.UInt32 + v0 := b.NewValue0(v.Pos, Op386MULLU, types.NewTuple(typ.UInt32, types.TypeFlags)) + v0.AddArg(x) + v0.AddArg(y) + v.AddArg(v0) + return true + } + return false +} +func rewriteValue386_OpSelect1_0(v *Value) bool { + b := v.Block + _ = b + typ := &b.Func.Config.Types + _ = typ + // match: (Select1 (Mul32uover x y)) + // cond: + // result: (SETO (Select1 (MULLU x y))) + for { + v_0 := v.Args[0] + if v_0.Op != OpMul32uover { + break + } + _ = v_0.Args[1] + x := v_0.Args[0] + y := v_0.Args[1] + v.reset(Op386SETO) + v0 := b.NewValue0(v.Pos, OpSelect1, types.TypeFlags) + v1 := b.NewValue0(v.Pos, Op386MULLU, types.NewTuple(typ.UInt32, types.TypeFlags)) + v1.AddArg(x) + v1.AddArg(y) + v0.AddArg(v1) + v.AddArg(v0) + return true + } + return false +} func rewriteValue386_OpSignExt16to32_0(v *Value) bool { // match: (SignExt16to32 x) // cond: @@ -24845,6 +24902,20 @@ func rewriteBlock386(b *Block) bool { b.Aux = nil return true } + // match: (If (SETO cmp) yes no) + // cond: + // result: (OS cmp yes no) + for { + v := b.Control + if v.Op != Op386SETO { + break + } + cmp := v.Args[0] + b.Kind = Block386OS + b.SetControl(cmp) + b.Aux = nil + return true + } // match: (If (SETGF cmp) yes no) // cond: // result: (UGT cmp yes no) @@ -25602,6 +25673,58 @@ func rewriteBlock386(b *Block) bool { b.Aux = nil return true } + // match: (NE (TESTB (SETO cmp) (SETO cmp)) yes no) + // cond: + // result: (OS cmp yes no) + for { + v := b.Control + if v.Op != Op386TESTB { + break + } + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != Op386SETO { + break + } + cmp := v_0.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386SETO { + break + } + if cmp != v_1.Args[0] { + break + } + b.Kind = Block386OS + b.SetControl(cmp) + b.Aux = nil + return true + } + // match: (NE (TESTB (SETO cmp) (SETO cmp)) yes no) + // cond: + // result: (OS cmp yes no) + for { + v := b.Control + if v.Op != Op386TESTB { + break + } + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != Op386SETO { + break + } + cmp := v_0.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386SETO { + break + } + if cmp != v_1.Args[0] { + break + } + b.Kind = Block386OS + b.SetControl(cmp) + b.Aux = nil + return true + } // match: (NE (TESTB (SETGF cmp) (SETGF cmp)) yes no) // cond: // result: (UGT cmp yes no) diff --git a/src/cmd/compile/internal/ssa/rewriteAMD64.go b/src/cmd/compile/internal/ssa/rewriteAMD64.go index e89ed9edb6..254c40a4ea 100644 --- a/src/cmd/compile/internal/ssa/rewriteAMD64.go +++ b/src/cmd/compile/internal/ssa/rewriteAMD64.go @@ -64552,6 +64552,46 @@ func rewriteValueAMD64_OpRsh8x8_0(v *Value) bool { func rewriteValueAMD64_OpSelect0_0(v *Value) bool { b := v.Block _ = b + typ := &b.Func.Config.Types + _ = typ + // match: (Select0 (Mul64uover x y)) + // cond: + // result: (Select0 (MULQU x y)) + for { + v_0 := v.Args[0] + if v_0.Op != OpMul64uover { + break + } + _ = v_0.Args[1] + x := v_0.Args[0] + y := v_0.Args[1] + v.reset(OpSelect0) + v.Type = typ.UInt64 + v0 := b.NewValue0(v.Pos, OpAMD64MULQU, types.NewTuple(typ.UInt64, types.TypeFlags)) + v0.AddArg(x) + v0.AddArg(y) + v.AddArg(v0) + return true + } + // match: (Select0 (Mul32uover x y)) + // cond: + // result: (Select0 (MULLU x y)) + for { + v_0 := v.Args[0] + if v_0.Op != OpMul32uover { + break + } + _ = v_0.Args[1] + x := v_0.Args[0] + y := v_0.Args[1] + v.reset(OpSelect0) + v.Type = typ.UInt32 + v0 := b.NewValue0(v.Pos, OpAMD64MULLU, types.NewTuple(typ.UInt32, types.TypeFlags)) + v0.AddArg(x) + v0.AddArg(y) + v.AddArg(v0) + return true + } // match: (Select0 (AddTupleFirst32 val tuple)) // cond: // result: (ADDL val (Select0 tuple)) @@ -64593,6 +64633,50 @@ func rewriteValueAMD64_OpSelect0_0(v *Value) bool { return false } func rewriteValueAMD64_OpSelect1_0(v *Value) bool { + b := v.Block + _ = b + typ := &b.Func.Config.Types + _ = typ + // match: (Select1 (Mul64uover x y)) + // cond: + // result: (SETO (Select1 (MULQU x y))) + for { + v_0 := v.Args[0] + if v_0.Op != OpMul64uover { + break + } + _ = v_0.Args[1] + x := v_0.Args[0] + y := v_0.Args[1] + v.reset(OpAMD64SETO) + v0 := b.NewValue0(v.Pos, OpSelect1, types.TypeFlags) + v1 := b.NewValue0(v.Pos, OpAMD64MULQU, types.NewTuple(typ.UInt64, types.TypeFlags)) + v1.AddArg(x) + v1.AddArg(y) + v0.AddArg(v1) + v.AddArg(v0) + return true + } + // match: (Select1 (Mul32uover x y)) + // cond: + // result: (SETO (Select1 (MULLU x y))) + for { + v_0 := v.Args[0] + if v_0.Op != OpMul32uover { + break + } + _ = v_0.Args[1] + x := v_0.Args[0] + y := v_0.Args[1] + v.reset(OpAMD64SETO) + v0 := b.NewValue0(v.Pos, OpSelect1, types.TypeFlags) + v1 := b.NewValue0(v.Pos, OpAMD64MULLU, types.NewTuple(typ.UInt32, types.TypeFlags)) + v1.AddArg(x) + v1.AddArg(y) + v0.AddArg(v1) + v.AddArg(v0) + return true + } // match: (Select1 (AddTupleFirst32 _ tuple)) // cond: // result: (Select1 tuple) @@ -66757,6 +66841,20 @@ func rewriteBlockAMD64(b *Block) bool { b.Aux = nil return true } + // match: (If (SETO cmp) yes no) + // cond: + // result: (OS cmp yes no) + for { + v := b.Control + if v.Op != OpAMD64SETO { + break + } + cmp := v.Args[0] + b.Kind = BlockAMD64OS + b.SetControl(cmp) + b.Aux = nil + return true + } // match: (If (SETGF cmp) yes no) // cond: // result: (UGT cmp yes no) @@ -67514,6 +67612,58 @@ func rewriteBlockAMD64(b *Block) bool { b.Aux = nil return true } + // match: (NE (TESTB (SETO cmp) (SETO cmp)) yes no) + // cond: + // result: (OS cmp yes no) + for { + v := b.Control + if v.Op != OpAMD64TESTB { + break + } + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpAMD64SETO { + break + } + cmp := v_0.Args[0] + v_1 := v.Args[1] + if v_1.Op != OpAMD64SETO { + break + } + if cmp != v_1.Args[0] { + break + } + b.Kind = BlockAMD64OS + b.SetControl(cmp) + b.Aux = nil + return true + } + // match: (NE (TESTB (SETO cmp) (SETO cmp)) yes no) + // cond: + // result: (OS cmp yes no) + for { + v := b.Control + if v.Op != OpAMD64TESTB { + break + } + _ = v.Args[1] + v_0 := v.Args[0] + if v_0.Op != OpAMD64SETO { + break + } + cmp := v_0.Args[0] + v_1 := v.Args[1] + if v_1.Op != OpAMD64SETO { + break + } + if cmp != v_1.Args[0] { + break + } + b.Kind = BlockAMD64OS + b.SetControl(cmp) + b.Aux = nil + return true + } // match: (NE (TESTL (SHLL (MOVLconst [1]) x) y)) // cond: !config.nacl // result: (ULT (BTL x y)) diff --git a/src/cmd/compile/internal/x86/ssa.go b/src/cmd/compile/internal/x86/ssa.go index e0aebb449c..8a6f015854 100644 --- a/src/cmd/compile/internal/x86/ssa.go +++ b/src/cmd/compile/internal/x86/ssa.go @@ -278,6 +278,13 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { m.To.Reg = x86.REG_DX } + case ssa.Op386MULLU: + // Arg[0] is already in AX as it's the only register we allow + // results lo in AX + p := s.Prog(v.Op.Asm()) + p.From.Type = obj.TYPE_REG + p.From.Reg = v.Args[1].Reg() + case ssa.Op386MULLQU: // AX * args[1], high 32 bits in DX (result[0]), low 32 bits in AX (result[1]). p := s.Prog(v.Op.Asm()) @@ -770,7 +777,8 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { ssa.Op386SETGF, ssa.Op386SETGEF, ssa.Op386SETB, ssa.Op386SETBE, ssa.Op386SETORD, ssa.Op386SETNAN, - ssa.Op386SETA, ssa.Op386SETAE: + ssa.Op386SETA, ssa.Op386SETAE, + ssa.Op386SETO: p := s.Prog(v.Op.Asm()) p.To.Type = obj.TYPE_REG p.To.Reg = v.Reg() @@ -842,6 +850,8 @@ var blockJump = [...]struct { ssa.Block386GE: {x86.AJGE, x86.AJLT}, ssa.Block386LE: {x86.AJLE, x86.AJGT}, ssa.Block386GT: {x86.AJGT, x86.AJLE}, + ssa.Block386OS: {x86.AJOS, x86.AJOC}, + ssa.Block386OC: {x86.AJOC, x86.AJOS}, ssa.Block386ULT: {x86.AJCS, x86.AJCC}, ssa.Block386UGE: {x86.AJCC, x86.AJCS}, ssa.Block386UGT: {x86.AJHI, x86.AJLS}, @@ -903,6 +913,7 @@ func ssaGenBlock(s *gc.SSAGenState, b, next *ssa.Block) { case ssa.Block386EQ, ssa.Block386NE, ssa.Block386LT, ssa.Block386GE, ssa.Block386LE, ssa.Block386GT, + ssa.Block386OS, ssa.Block386OC, ssa.Block386ULT, ssa.Block386UGT, ssa.Block386ULE, ssa.Block386UGE: jmp := blockJump[b.Kind] diff --git a/src/runtime/internal/math/math_test.go b/src/runtime/internal/math/math_test.go index 9447bd23f9..303eb63405 100644 --- a/src/runtime/internal/math/math_test.go +++ b/src/runtime/internal/math/math_test.go @@ -49,3 +49,31 @@ func TestMulUintptr(t *testing.T) { } } } + +var SinkUintptr uintptr +var SinkBool bool + +var x, y uintptr + +func BenchmarkMulUintptr(b *testing.B) { + x, y = 1, 2 + b.Run("small", func(b *testing.B) { + for i := 0; i < b.N; i++ { + var overflow bool + SinkUintptr, overflow = MulUintptr(x, y) + if overflow { + SinkUintptr = 0 + } + } + }) + x, y = MaxUintptr, MaxUintptr-1 + b.Run("large", func(b *testing.B) { + for i := 0; i < b.N; i++ { + var overflow bool + SinkUintptr, overflow = MulUintptr(x, y) + if overflow { + SinkUintptr = 0 + } + } + }) +} From a0f57c3fd0cff8b92ffb4257a6d1b56467bf30f1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Mon, 4 Jun 2018 08:24:11 +0200 Subject: [PATCH 140/240] cmd/compile: avoid string allocations when map key is struct or array literal MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit x = map[string(byteslice)] is already optimized by the compiler to avoid a string allocation. This CL generalizes this optimization to: x = map[T1{ ... Tn{..., string(byteslice), ...} ... }] where T1 to Tn is a nesting of struct and array literals. Found in a hot code path that used a struct of strings made from []byte slices to make a map lookup. There are no uses of the more generalized optimization in the standard library. Passes toolstash -cmp. MapStringConversion/32/simple 21.9ns ± 2% 21.9ns ± 3% ~ (p=0.995 n=17+20) MapStringConversion/32/struct 28.8ns ± 3% 22.0ns ± 2% -23.80% (p=0.000 n=20+20) MapStringConversion/32/array 28.5ns ± 2% 21.9ns ± 2% -23.14% (p=0.000 n=19+16) MapStringConversion/64/simple 21.0ns ± 2% 21.1ns ± 3% ~ (p=0.072 n=19+18) MapStringConversion/64/struct 72.4ns ± 3% 21.3ns ± 2% -70.53% (p=0.000 n=20+20) MapStringConversion/64/array 72.8ns ± 1% 21.0ns ± 2% -71.13% (p=0.000 n=17+19) name old allocs/op new allocs/op delta MapStringConversion/32/simple 0.00 0.00 ~ (all equal) MapStringConversion/32/struct 0.00 0.00 ~ (all equal) MapStringConversion/32/array 0.00 0.00 ~ (all equal) MapStringConversion/64/simple 0.00 0.00 ~ (all equal) MapStringConversion/64/struct 1.00 ± 0% 0.00 -100.00% (p=0.000 n=20+20) MapStringConversion/64/array 1.00 ± 0% 0.00 -100.00% (p=0.000 n=20+20) Change-Id: I483b4d84d8d74b1025b62c954da9a365e79b7a3a Reviewed-on: https://go-review.googlesource.com/c/116275 Reviewed-by: Matthew Dempsky Run-TryBot: Matthew Dempsky TryBot-Result: Gobot Gobot --- src/cmd/compile/internal/gc/order.go | 75 ++++++++++++++++++++-------- src/runtime/map_benchmark_test.go | 34 +++++++++++++ src/runtime/string.go | 3 +- test/codegen/maps.go | 29 +++++++++++ 4 files changed, 118 insertions(+), 23 deletions(-) diff --git a/src/cmd/compile/internal/gc/order.go b/src/cmd/compile/internal/gc/order.go index 694f8fbd34..e603a39b2a 100644 --- a/src/cmd/compile/internal/gc/order.go +++ b/src/cmd/compile/internal/gc/order.go @@ -233,6 +233,45 @@ func (o *Order) mapKeyTemp(t *types.Type, n *Node) *Node { return n } +// mapKeyReplaceStrConv replaces OARRAYBYTESTR by OARRAYBYTESTRTMP +// in n to avoid string allocations for keys in map lookups. +// Returns a bool that signals if a modification was made. +// +// For: +// x = m[string(k)] +// x = m[T1{... Tn{..., string(k), ...}] +// where k is []byte, T1 to Tn is a nesting of struct and array literals, +// the allocation of backing bytes for the string can be avoided +// by reusing the []byte backing array. These are special cases +// for avoiding allocations when converting byte slices to strings. +// It would be nice to handle these generally, but because +// []byte keys are not allowed in maps, the use of string(k) +// comes up in important cases in practice. See issue 3512. +func mapKeyReplaceStrConv(n *Node) bool { + var replaced bool + switch n.Op { + case OARRAYBYTESTR: + n.Op = OARRAYBYTESTRTMP + replaced = true + case OSTRUCTLIT: + for _, elem := range n.List.Slice() { + if mapKeyReplaceStrConv(elem.Left) { + replaced = true + } + } + case OARRAYLIT: + for _, elem := range n.List.Slice() { + if elem.Op == OKEY { + elem = elem.Right + } + if mapKeyReplaceStrConv(elem) { + replaced = true + } + } + } + return replaced +} + type ordermarker int // Marktemp returns the top of the temporary variable stack. @@ -580,10 +619,9 @@ func (o *Order) stmt(n *Node) { r.Left = o.expr(r.Left, nil) r.Right = o.expr(r.Right, nil) - // See case OINDEXMAP below. - if r.Right.Op == OARRAYBYTESTR { - r.Right.Op = OARRAYBYTESTRTMP - } + // See similar conversion for OINDEXMAP below. + _ = mapKeyReplaceStrConv(r.Right) + r.Right = o.mapKeyTemp(r.Left.Type, r.Right) o.okAs2(n) o.cleanTemp(t) @@ -1042,25 +1080,18 @@ func (o *Order) expr(n, lhs *Node) *Node { n.Right = o.expr(n.Right, nil) needCopy := false - if !n.IndexMapLValue() && instrumenting { - // Race detector needs the copy so it can - // call treecopy on the result. - needCopy = true - } + if !n.IndexMapLValue() { + // Enforce that any []byte slices we are not copying + // can not be changed before the map index by forcing + // the map index to happen immediately following the + // conversions. See copyExpr a few lines below. + needCopy = mapKeyReplaceStrConv(n.Right) - // For x = m[string(k)] where k is []byte, the allocation of - // backing bytes for the string can be avoided by reusing - // the []byte backing array. This is a special case that it - // would be nice to handle more generally, but because - // there are no []byte-keyed maps, this specific case comes - // up in important cases in practice. See issue 3512. - // Nothing can change the []byte we are not copying before - // the map index, because the map access is going to - // be forced to happen immediately following this - // conversion (by the ordercopyexpr a few lines below). - if !n.IndexMapLValue() && n.Right.Op == OARRAYBYTESTR { - n.Right.Op = OARRAYBYTESTRTMP - needCopy = true + if instrumenting { + // Race detector needs the copy so it can + // call treecopy on the result. + needCopy = true + } } n.Right = o.mapKeyTemp(n.Left.Type, n.Right) diff --git a/src/runtime/map_benchmark_test.go b/src/runtime/map_benchmark_test.go index 025c0398d3..1d9d09c698 100644 --- a/src/runtime/map_benchmark_test.go +++ b/src/runtime/map_benchmark_test.go @@ -370,3 +370,37 @@ func BenchmarkGoMapClear(b *testing.B) { } }) } + +func BenchmarkMapStringConversion(b *testing.B) { + for _, length := range []int{32, 64} { + b.Run(strconv.Itoa(length), func(b *testing.B) { + bytes := make([]byte, length) + b.Run("simple", func(b *testing.B) { + b.ReportAllocs() + m := make(map[string]int) + m[string(bytes)] = 0 + for i := 0; i < b.N; i++ { + _ = m[string(bytes)] + } + }) + b.Run("struct", func(b *testing.B) { + b.ReportAllocs() + type stringstruct struct{ s string } + m := make(map[stringstruct]int) + m[stringstruct{string(bytes)}] = 0 + for i := 0; i < b.N; i++ { + _ = m[stringstruct{string(bytes)}] + } + }) + b.Run("array", func(b *testing.B) { + b.ReportAllocs() + type stringarray [1]string + m := make(map[stringarray]int) + m[stringarray{string(bytes)}] = 0 + for i := 0; i < b.N; i++ { + _ = m[stringarray{string(bytes)}] + } + }) + }) + } +} diff --git a/src/runtime/string.go b/src/runtime/string.go index d10bd96f43..839e882cdc 100644 --- a/src/runtime/string.go +++ b/src/runtime/string.go @@ -135,7 +135,8 @@ func rawstringtmp(buf *tmpBuf, l int) (s string, b []byte) { // and otherwise intrinsified by the compiler. // // Some internal compiler optimizations use this function. -// - Used for m[string(k)] lookup where m is a string-keyed map and k is a []byte. +// - Used for m[T1{... Tn{..., string(k), ...} ...}] and m[string(k)] +// where k is []byte, T1 to Tn is a nesting of struct and array literals. // - Used for "<"+string(b)+">" concatenation where b is []byte. // - Used for string(b)=="foo" comparison where b is []byte. func slicebytetostringtmp(b []byte) string { diff --git a/test/codegen/maps.go b/test/codegen/maps.go index d167715898..8dd22ed5ca 100644 --- a/test/codegen/maps.go +++ b/test/codegen/maps.go @@ -37,6 +37,35 @@ func AccessString2(m map[string]int) bool { return ok } +// ------------------- // +// String Conversion // +// ------------------- // + +func LookupStringConversionSimple(m map[string]int, bytes []byte) int { + // amd64:-`.*runtime\.slicebytetostring\(` + return m[string(bytes)] +} + +func LookupStringConversionStructLit(m map[struct{ string }]int, bytes []byte) int { + // amd64:-`.*runtime\.slicebytetostring\(` + return m[struct{ string }{string(bytes)}] +} + +func LookupStringConversionArrayLit(m map[[2]string]int, bytes []byte) int { + // amd64:-`.*runtime\.slicebytetostring\(` + return m[[2]string{string(bytes), string(bytes)}] +} + +func LookupStringConversionNestedLit(m map[[1]struct{ s [1]string }]int, bytes []byte) int { + // amd64:-`.*runtime\.slicebytetostring\(` + return m[[1]struct{ s [1]string }{struct{ s [1]string }{s: [1]string{string(bytes)}}}] +} + +func LookupStringConversionKeyedArrayLit(m map[[2]string]int, bytes []byte) int { + // amd64:-`.*runtime\.slicebytetostring\(` + return m[[2]string{0: string(bytes)}] +} + // ------------------- // // Map Clear // // ------------------- // From f81d73e8d57c99d32744e61940dad08c4ec07111 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Sun, 6 May 2018 12:19:25 +0200 Subject: [PATCH 141/240] strconv: add comment explaining bounded shift in formatBits MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The compiler can generate better code for shifts bounded to be less than 32 and thereby known to be less than any register width. See https://golang.org/cl/109776. Change-Id: I0c4c9f0faafa065fce3c10fd328830deb92f9e38 Reviewed-on: https://go-review.googlesource.com/c/111735 Run-TryBot: Martin Möhrmann TryBot-Result: Gobot Gobot Reviewed-by: Robert Griesemer Reviewed-by: Brad Fitzpatrick --- src/strconv/itoa.go | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/src/strconv/itoa.go b/src/strconv/itoa.go index 8afe7af251..4aaf57830c 100644 --- a/src/strconv/itoa.go +++ b/src/strconv/itoa.go @@ -152,10 +152,14 @@ func formatBits(dst []byte, u uint64, base int, neg, append_ bool) (d []byte, s } } else if isPowerOfTwo(base) { - // It is known that base is a power of two and - // 2 <= base <= len(digits). // Use shifts and masks instead of / and %. - shift := uint(bits.TrailingZeros(uint(base))) & 31 + // Base is a power of 2 and 2 <= base <= len(digits) where len(digits) is 36. + // The largest power of 2 below or equal to 36 is 32, which is 1 << 5; + // i.e., the largest possible shift count is 5. By &-ind that value with + // the constant 7 we tell the compiler that the shift count is always + // less than 8 which is smaller than any register width. This allows + // the compiler to generate better code for the shift operation. + shift := uint(bits.TrailingZeros(uint(base))) & 7 b := uint64(base) m := uint(base) - 1 // == 1<= b { From 3e0227f6a055fff2ceab18ed1ac6bd583a7f94a5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Fri, 12 Oct 2018 19:17:21 +0200 Subject: [PATCH 142/240] internal/cpu: add invalid option warnings and support to enable cpu features MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This CL adds the ability to enable the cpu feature FEATURE by specifying FEATURE=on in GODEBUGCPU. Syntax support to enable cpu features is useful in combination with a preceeding all=off to disable all but some specific cpu features. Example: GODEBUGCPU=all=off,sse3=on This CL implements printing of warnings for invalid GODEBUGCPU settings: - requests enabling features that are not supported with the current CPU - specifying values different than 'on' or 'off' for a feature - settings for unkown cpu feature names Updates #27218 Change-Id: Ic13e5c4c35426a390c50eaa4bd2a408ef2ee21be Reviewed-on: https://go-review.googlesource.com/c/141800 Run-TryBot: Martin Möhrmann TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/internal/cpu/cpu.go | 70 ++++++++++++++++++++++---------- src/internal/cpu/cpu_arm.go | 4 +- src/internal/cpu/cpu_arm64.go | 48 +++++++++++----------- src/internal/cpu/cpu_ppc64x.go | 18 ++++---- src/internal/cpu/cpu_s390x.go | 16 ++++---- src/internal/cpu/cpu_test.go | 5 ++- src/internal/cpu/cpu_x86.go | 30 +++++++------- src/internal/cpu/cpu_x86_test.go | 17 ++++++++ 8 files changed, 128 insertions(+), 80 deletions(-) diff --git a/src/internal/cpu/cpu.go b/src/internal/cpu/cpu.go index 1f3411cc72..925e4f7f6e 100644 --- a/src/internal/cpu/cpu.go +++ b/src/internal/cpu/cpu.go @@ -153,16 +153,18 @@ var options []option // Option names should be lower case. e.g. avx instead of AVX. type option struct { - Name string - Feature *bool + Name string + Feature *bool + Specified bool // Stores if feature value was specified in GODEBUGCPU. + Enable bool // Stores if feature should be enabled. } -// processOptions disables CPU feature values based on the parsed env string. -// The env string is expected to be of the form feature1=off,feature2=off... +// processOptions enables or disables CPU feature values based on the parsed env string. +// The env string is expected to be of the form feature1=value1,feature2=value2... // where feature names is one of the architecture specifc list stored in the -// cpu packages options variable. If env contains all=off then all capabilities -// referenced through the options variable are disabled. Other feature -// names and values other than 'off' are silently ignored. +// cpu packages options variable and values are either 'on' or 'off'. +// If env contains all=off then all cpu features referenced through the options +// variable are disabled. Other feature names and values result in warning messages. func processOptions(env string) { field: for env != "" { @@ -175,26 +177,52 @@ field: } i = indexByte(field, '=') if i < 0 { + print("GODEBUGCPU: no value specified for \"", field, "\"\n") continue } key, value := field[:i], field[i+1:] - // Only allow turning off CPU features by specifying 'off'. - if value == "off" { - if key == "all" { - for _, v := range options { - *v.Feature = false - } - return - } else { - for _, v := range options { - if v.Name == key { - *v.Feature = false - continue field - } - } + var enable bool + switch value { + case "on": + enable = true + case "off": + enable = false + default: + print("GODEBUGCPU: value \"", value, "\" not supported for option ", key, "\n") + continue field + } + + if key == "all" { + for i := range options { + options[i].Specified = true + options[i].Enable = enable + } + continue field + } + + for i := range options { + if options[i].Name == key { + options[i].Specified = true + options[i].Enable = enable + continue field } } + + print("GODEBUGCPU: unknown cpu feature \"", key, "\"\n") + } + + for _, o := range options { + if !o.Specified { + continue + } + + if o.Enable && !*o.Feature { + print("GODEBUGCPU: can not enable \"", o.Name, "\", missing hardware support\n") + continue + } + + *o.Feature = o.Enable } } diff --git a/src/internal/cpu/cpu_arm.go b/src/internal/cpu/cpu_arm.go index 1c3e529190..772b67147c 100644 --- a/src/internal/cpu/cpu_arm.go +++ b/src/internal/cpu/cpu_arm.go @@ -21,8 +21,8 @@ const ( func doinit() { options = []option{ - {"vfpv4", &ARM.HasVFPv4}, - {"idiva", &ARM.HasIDIVA}, + {Name: "vfpv4", Feature: &ARM.HasVFPv4}, + {Name: "idiva", Feature: &ARM.HasIDIVA}, } // HWCAP feature bits diff --git a/src/internal/cpu/cpu_arm64.go b/src/internal/cpu/cpu_arm64.go index ad930af005..25482a1f7e 100644 --- a/src/internal/cpu/cpu_arm64.go +++ b/src/internal/cpu/cpu_arm64.go @@ -42,32 +42,32 @@ const ( func doinit() { options = []option{ - {"evtstrm", &ARM64.HasEVTSTRM}, - {"aes", &ARM64.HasAES}, - {"pmull", &ARM64.HasPMULL}, - {"sha1", &ARM64.HasSHA1}, - {"sha2", &ARM64.HasSHA2}, - {"crc32", &ARM64.HasCRC32}, - {"atomics", &ARM64.HasATOMICS}, - {"fphp", &ARM64.HasFPHP}, - {"asimdhp", &ARM64.HasASIMDHP}, - {"cpuid", &ARM64.HasCPUID}, - {"asimdrdm", &ARM64.HasASIMDRDM}, - {"jscvt", &ARM64.HasJSCVT}, - {"fcma", &ARM64.HasFCMA}, - {"lrcpc", &ARM64.HasLRCPC}, - {"dcpop", &ARM64.HasDCPOP}, - {"sha3", &ARM64.HasSHA3}, - {"sm3", &ARM64.HasSM3}, - {"sm4", &ARM64.HasSM4}, - {"asimddp", &ARM64.HasASIMDDP}, - {"sha512", &ARM64.HasSHA512}, - {"sve", &ARM64.HasSVE}, - {"asimdfhm", &ARM64.HasASIMDFHM}, + {Name: "evtstrm", Feature: &ARM64.HasEVTSTRM}, + {Name: "aes", Feature: &ARM64.HasAES}, + {Name: "pmull", Feature: &ARM64.HasPMULL}, + {Name: "sha1", Feature: &ARM64.HasSHA1}, + {Name: "sha2", Feature: &ARM64.HasSHA2}, + {Name: "crc32", Feature: &ARM64.HasCRC32}, + {Name: "atomics", Feature: &ARM64.HasATOMICS}, + {Name: "fphp", Feature: &ARM64.HasFPHP}, + {Name: "asimdhp", Feature: &ARM64.HasASIMDHP}, + {Name: "cpuid", Feature: &ARM64.HasCPUID}, + {Name: "asimdrdm", Feature: &ARM64.HasASIMDRDM}, + {Name: "jscvt", Feature: &ARM64.HasJSCVT}, + {Name: "fcma", Feature: &ARM64.HasFCMA}, + {Name: "lrcpc", Feature: &ARM64.HasLRCPC}, + {Name: "dcpop", Feature: &ARM64.HasDCPOP}, + {Name: "sha3", Feature: &ARM64.HasSHA3}, + {Name: "sm3", Feature: &ARM64.HasSM3}, + {Name: "sm4", Feature: &ARM64.HasSM4}, + {Name: "asimddp", Feature: &ARM64.HasASIMDDP}, + {Name: "sha512", Feature: &ARM64.HasSHA512}, + {Name: "sve", Feature: &ARM64.HasSVE}, + {Name: "asimdfhm", Feature: &ARM64.HasASIMDFHM}, // These capabilities should always be enabled on arm64: - // {"fp", &ARM64.HasFP}, - // {"asimd", &ARM64.HasASIMD}, + // {Name: "fp", Feature: &ARM64.HasFP}, + // {Name: "asimd", Feature: &ARM64.HasASIMD}, } // HWCAP feature bits diff --git a/src/internal/cpu/cpu_ppc64x.go b/src/internal/cpu/cpu_ppc64x.go index 0195e663c6..b39f5f5bbb 100644 --- a/src/internal/cpu/cpu_ppc64x.go +++ b/src/internal/cpu/cpu_ppc64x.go @@ -34,17 +34,17 @@ const ( func doinit() { options = []option{ - {"htm", &PPC64.HasHTM}, - {"htmnosc", &PPC64.HasHTMNOSC}, - {"darn", &PPC64.HasDARN}, - {"scv", &PPC64.HasSCV}, + {Name: "htm", Feature: &PPC64.HasHTM}, + {Name: "htmnosc", Feature: &PPC64.HasHTMNOSC}, + {Name: "darn", Feature: &PPC64.HasDARN}, + {Name: "scv", Feature: &PPC64.HasSCV}, // These capabilities should always be enabled on ppc64 and ppc64le: - // {"vmx", &PPC64.HasVMX}, - // {"dfp", &PPC64.HasDFP}, - // {"vsx", &PPC64.HasVSX}, - // {"isel", &PPC64.HasISEL}, - // {"vcrypto", &PPC64.HasVCRYPTO}, + // {Name: "vmx", Feature: &PPC64.HasVMX}, + // {Name: "dfp", Feature: &PPC64.HasDFP}, + // {Name: "vsx", Feature: &PPC64.HasVSX}, + // {Name: "isel", Feature: &PPC64.HasISEL}, + // {Name: "vcrypto", Feature: &PPC64.HasVCRYPTO}, } // HWCAP feature bits diff --git a/src/internal/cpu/cpu_s390x.go b/src/internal/cpu/cpu_s390x.go index 23484b2950..eab77e6ee5 100644 --- a/src/internal/cpu/cpu_s390x.go +++ b/src/internal/cpu/cpu_s390x.go @@ -107,14 +107,14 @@ func klmdQuery() queryResult func doinit() { options = []option{ - {"zarch", &S390X.HasZArch}, - {"stfle", &S390X.HasSTFLE}, - {"ldisp", &S390X.HasLDisp}, - {"msa", &S390X.HasMSA}, - {"eimm", &S390X.HasEImm}, - {"dfp", &S390X.HasDFP}, - {"etf3eh", &S390X.HasETF3Enhanced}, - {"vx", &S390X.HasVX}, + {Name: "zarch", Feature: &S390X.HasZArch}, + {Name: "stfle", Feature: &S390X.HasSTFLE}, + {Name: "ldisp", Feature: &S390X.HasLDisp}, + {Name: "msa", Feature: &S390X.HasMSA}, + {Name: "eimm", Feature: &S390X.HasEImm}, + {Name: "dfp", Feature: &S390X.HasDFP}, + {Name: "etf3eh", Feature: &S390X.HasETF3Enhanced}, + {Name: "vx", Feature: &S390X.HasVX}, } aes := []function{aes128, aes192, aes256} diff --git a/src/internal/cpu/cpu_test.go b/src/internal/cpu/cpu_test.go index 6e7375fa7c..6b4baa1694 100644 --- a/src/internal/cpu/cpu_test.go +++ b/src/internal/cpu/cpu_test.go @@ -30,7 +30,10 @@ func runDebugOptionsTest(t *testing.T, test string, options string) { cmd.Env = append(cmd.Env, env) output, err := cmd.CombinedOutput() - got := strings.TrimSpace(string(output)) + lines := strings.Fields(string(output)) + lastline := lines[len(lines)-1] + + got := strings.TrimSpace(lastline) want := "PASS" if err != nil || got != want { t.Fatalf("%s with %s: want %s, got %v", test, env, want, got) diff --git a/src/internal/cpu/cpu_x86.go b/src/internal/cpu/cpu_x86.go index 0b00779a90..014c8018f3 100644 --- a/src/internal/cpu/cpu_x86.go +++ b/src/internal/cpu/cpu_x86.go @@ -40,23 +40,23 @@ const ( func doinit() { options = []option{ - {"adx", &X86.HasADX}, - {"aes", &X86.HasAES}, - {"avx", &X86.HasAVX}, - {"avx2", &X86.HasAVX2}, - {"bmi1", &X86.HasBMI1}, - {"bmi2", &X86.HasBMI2}, - {"erms", &X86.HasERMS}, - {"fma", &X86.HasFMA}, - {"pclmulqdq", &X86.HasPCLMULQDQ}, - {"popcnt", &X86.HasPOPCNT}, - {"sse3", &X86.HasSSE3}, - {"sse41", &X86.HasSSE41}, - {"sse42", &X86.HasSSE42}, - {"ssse3", &X86.HasSSSE3}, + {Name: "adx", Feature: &X86.HasADX}, + {Name: "aes", Feature: &X86.HasAES}, + {Name: "avx", Feature: &X86.HasAVX}, + {Name: "avx2", Feature: &X86.HasAVX2}, + {Name: "bmi1", Feature: &X86.HasBMI1}, + {Name: "bmi2", Feature: &X86.HasBMI2}, + {Name: "erms", Feature: &X86.HasERMS}, + {Name: "fma", Feature: &X86.HasFMA}, + {Name: "pclmulqdq", Feature: &X86.HasPCLMULQDQ}, + {Name: "popcnt", Feature: &X86.HasPOPCNT}, + {Name: "sse3", Feature: &X86.HasSSE3}, + {Name: "sse41", Feature: &X86.HasSSE41}, + {Name: "sse42", Feature: &X86.HasSSE42}, + {Name: "ssse3", Feature: &X86.HasSSSE3}, // sse2 set as last element so it can easily be removed again. See code below. - {"sse2", &X86.HasSSE2}, + {Name: "sse2", Feature: &X86.HasSSE2}, } // Remove sse2 from options on amd64(p32) because SSE2 is a mandatory feature for these GOARCHs. diff --git a/src/internal/cpu/cpu_x86_test.go b/src/internal/cpu/cpu_x86_test.go index 59c51770c5..a8d0466e06 100644 --- a/src/internal/cpu/cpu_x86_test.go +++ b/src/internal/cpu/cpu_x86_test.go @@ -45,3 +45,20 @@ func TestSSE2DebugOption(t *testing.T) { t.Errorf("X86.HasSSE2 on %s expected %v, got %v", runtime.GOARCH, want, got) } } + +func TestDisableSSE3(t *testing.T) { + runDebugOptionsTest(t, "TestSSE3DebugOption", "sse3=off") +} + +func TestSSE3DebugOption(t *testing.T) { + MustHaveDebugOptionsSupport(t) + + if os.Getenv("GODEBUGCPU") != "sse3=off" { + t.Skipf("skipping test: GODEBUGCPU=sse3=off not set") + } + + want := false + if got := X86.HasSSE3; got != want { + t.Errorf("X86.HasSSE3 expected %v, got %v", want, got) + } +} From 7f3313133ee3e40515aa99d3618b8e5eafed42d6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Mart=C3=AD?= Date: Sun, 7 Oct 2018 12:45:56 +0100 Subject: [PATCH 143/240] cmd/compile: don't panic on invalid map key declarations MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In golang.org/cl/75310, the compiler's typechecker was changed so that map key types were validated at a later stage, to make sure that all the necessary type information was present. This still worked for map type declarations, but caused a regression for top-level map variable declarations. These now caused a fatal panic instead of a typechecking error. The cause was that checkMapKeys was run too early, before all typechecking was done. In particular, top-level map variable declarations are typechecked as external declarations, much later than where checkMapKeys was run. Add a test case for both exported and unexported top-level map declarations, and add a second call to checkMapKeys at the actual end of typechecking. Simply moving the one call isn't a good solution either; the comments expand on that. Fixes #28058. Change-Id: Ia5febb01a1d877447cf66ba44fb49a7e0f4f18a5 Reviewed-on: https://go-review.googlesource.com/c/140417 Run-TryBot: Daniel Martí TryBot-Result: Gobot Gobot Reviewed-by: Robert Griesemer --- src/cmd/compile/internal/gc/main.go | 7 ++++++- test/fixedbugs/issue28058.go | 13 +++++++++++++ 2 files changed, 19 insertions(+), 1 deletion(-) create mode 100644 test/fixedbugs/issue28058.go diff --git a/src/cmd/compile/internal/gc/main.go b/src/cmd/compile/internal/gc/main.go index 02aec32685..9a226318b9 100644 --- a/src/cmd/compile/internal/gc/main.go +++ b/src/cmd/compile/internal/gc/main.go @@ -534,7 +534,9 @@ func Main(archInit func(*Arch)) { fcount++ } } - // With all types ckecked, it's now safe to verify map keys. + // With all types ckecked, it's now safe to verify map keys. One single + // check past phase 9 isn't sufficient, as we may exit with other errors + // before then, thus skipping map key errors. checkMapKeys() timings.AddEvent(fcount, "funcs") @@ -678,6 +680,9 @@ func Main(archInit func(*Arch)) { externdcl[i] = typecheck(externdcl[i], Erv) } } + // Check the map keys again, since we typechecked the external + // declarations. + checkMapKeys() if nerrors+nsavederrors != 0 { errorexit() diff --git a/test/fixedbugs/issue28058.go b/test/fixedbugs/issue28058.go new file mode 100644 index 0000000000..d8206e7357 --- /dev/null +++ b/test/fixedbugs/issue28058.go @@ -0,0 +1,13 @@ +// errorcheck + +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Issue 14988: declaring a map with an invalid key type should not cause a +// fatal panic. + +package main + +var x map[func()]int // ERROR "invalid map key type" +var X map[func()]int // ERROR "invalid map key type" From 3785be3093ef8a8ea3c71ff9608451de1ad85db8 Mon Sep 17 00:00:00 2001 From: Ben Shi Date: Tue, 16 Oct 2018 04:02:03 +0000 Subject: [PATCH 144/240] test/codegen: fix confusing test cases ARMv7's MULAF/MULSF/MULAD/MULSD are not fused, this CL fixes the confusing test cases. Change-Id: I35022e207e2f0d24a23a7f6f188e41ba8eee9886 Reviewed-on: https://go-review.googlesource.com/c/142439 Run-TryBot: Ben Shi TryBot-Result: Gobot Gobot Reviewed-by: Akhil Indurti Reviewed-by: Giovanni Bajo --- test/codegen/floats.go | 4 ---- 1 file changed, 4 deletions(-) diff --git a/test/codegen/floats.go b/test/codegen/floats.go index 847959c42e..c20f6984bf 100644 --- a/test/codegen/floats.go +++ b/test/codegen/floats.go @@ -72,7 +72,6 @@ func indexStore(b0 []float64, b1 float64, idx int) { func FusedAdd32(x, y, z float32) float32 { // s390x:"FMADDS\t" // ppc64le:"FMADDS\t" - // arm/7:"MULAF" // arm64:"FMADDS" return x*y + z } @@ -84,7 +83,6 @@ func FusedSub32_a(x, y, z float32) float32 { } func FusedSub32_b(x, y, z float32) float32 { - // arm/7:"MULSF" // arm64:"FMSUBS" return z - x*y } @@ -92,7 +90,6 @@ func FusedSub32_b(x, y, z float32) float32 { func FusedAdd64(x, y, z float64) float64 { // s390x:"FMADD\t" // ppc64le:"FMADD\t" - // arm/7:"MULAD" // arm64:"FMADDD" return x*y + z } @@ -104,7 +101,6 @@ func FusedSub64_a(x, y, z float64) float64 { } func FusedSub64_b(x, y, z float64) float64 { - // arm/7:"MULSD" // arm64:"FMSUBD" return z - x*y } From 4b78fe57a81fe4fd9a1c370c65e3a694066ac1ab Mon Sep 17 00:00:00 2001 From: Ben Shi Date: Mon, 15 Oct 2018 01:19:48 +0000 Subject: [PATCH 145/240] cmd/compile: optimize 386's load/store combination MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This CL adds more combinations of two consequtive MOVBload/MOVBstore to a unique MOVWload/MOVWstore. 1. The size of the go executable decreases about 4KB, and the total size of pkg/linux_386 (excluding cmd/compile) decreases about 1.5KB. 2. There is no regression in the go1 benchmark result, excluding noise. name old time/op new time/op delta BinaryTree17-4 3.28s ± 2% 3.29s ± 2% ~ (p=0.151 n=40+40) Fannkuch11-4 3.52s ± 1% 3.51s ± 1% -0.28% (p=0.002 n=40+40) FmtFprintfEmpty-4 45.4ns ± 4% 45.0ns ± 4% -0.89% (p=0.019 n=40+40) FmtFprintfString-4 81.9ns ± 7% 81.3ns ± 1% ~ (p=0.660 n=40+25) FmtFprintfInt-4 91.9ns ± 9% 91.4ns ± 9% ~ (p=0.249 n=40+40) FmtFprintfIntInt-4 143ns ± 4% 143ns ± 4% ~ (p=0.760 n=40+40) FmtFprintfPrefixedInt-4 184ns ± 3% 183ns ± 4% ~ (p=0.485 n=40+40) FmtFprintfFloat-4 408ns ± 3% 409ns ± 3% ~ (p=0.961 n=40+40) FmtManyArgs-4 597ns ± 4% 602ns ± 3% ~ (p=0.413 n=40+40) GobDecode-4 7.13ms ± 6% 7.14ms ± 6% ~ (p=0.859 n=40+40) GobEncode-4 6.86ms ± 9% 6.94ms ± 7% ~ (p=0.162 n=40+40) Gzip-4 395ms ± 4% 396ms ± 3% ~ (p=0.099 n=40+40) Gunzip-4 40.9ms ± 4% 41.1ms ± 3% ~ (p=0.064 n=40+40) HTTPClientServer-4 63.6µs ± 2% 63.6µs ± 3% ~ (p=0.832 n=36+39) JSONEncode-4 16.1ms ± 3% 15.8ms ± 3% -1.60% (p=0.001 n=40+40) JSONDecode-4 61.0ms ± 3% 61.5ms ± 4% ~ (p=0.065 n=40+40) Mandelbrot200-4 5.16ms ± 3% 5.18ms ± 3% ~ (p=0.056 n=40+40) GoParse-4 3.25ms ± 2% 3.23ms ± 3% ~ (p=0.727 n=40+40) RegexpMatchEasy0_32-4 90.2ns ± 3% 89.3ns ± 6% -0.98% (p=0.002 n=40+40) RegexpMatchEasy0_1K-4 812ns ± 3% 815ns ± 3% ~ (p=0.309 n=40+40) RegexpMatchEasy1_32-4 103ns ± 6% 103ns ± 5% ~ (p=0.680 n=40+40) RegexpMatchEasy1_1K-4 1.01µs ± 4% 1.02µs ± 3% ~ (p=0.326 n=40+33) RegexpMatchMedium_32-4 120ns ± 4% 120ns ± 5% ~ (p=0.834 n=40+40) RegexpMatchMedium_1K-4 40.1µs ± 3% 39.5µs ± 4% -1.35% (p=0.000 n=40+40) RegexpMatchHard_32-4 2.27µs ± 6% 2.23µs ± 4% -1.67% (p=0.011 n=40+40) RegexpMatchHard_1K-4 67.2µs ± 3% 67.2µs ± 3% ~ (p=0.149 n=40+40) Revcomp-4 1.84s ± 2% 1.86s ± 3% +0.70% (p=0.020 n=40+40) Template-4 69.0ms ± 4% 69.8ms ± 3% +1.20% (p=0.003 n=40+40) TimeParse-4 438ns ± 3% 439ns ± 4% ~ (p=0.650 n=40+40) TimeFormat-4 412ns ± 3% 412ns ± 3% ~ (p=0.888 n=40+40) [Geo mean] 65.2µs 65.2µs -0.04% name old speed new speed delta GobDecode-4 108MB/s ± 6% 108MB/s ± 6% ~ (p=0.855 n=40+40) GobEncode-4 112MB/s ± 9% 111MB/s ± 8% ~ (p=0.159 n=40+40) Gzip-4 49.2MB/s ± 4% 49.1MB/s ± 3% ~ (p=0.102 n=40+40) Gunzip-4 474MB/s ± 3% 472MB/s ± 3% ~ (p=0.063 n=40+40) JSONEncode-4 121MB/s ± 3% 123MB/s ± 3% +1.62% (p=0.001 n=40+40) JSONDecode-4 31.9MB/s ± 3% 31.6MB/s ± 4% ~ (p=0.070 n=40+40) GoParse-4 17.9MB/s ± 2% 17.9MB/s ± 3% ~ (p=0.696 n=40+40) RegexpMatchEasy0_32-4 355MB/s ± 3% 358MB/s ± 5% +0.99% (p=0.002 n=40+40) RegexpMatchEasy0_1K-4 1.26GB/s ± 3% 1.26GB/s ± 3% ~ (p=0.381 n=40+40) RegexpMatchEasy1_32-4 310MB/s ± 5% 310MB/s ± 4% ~ (p=0.655 n=40+40) RegexpMatchEasy1_1K-4 1.01GB/s ± 4% 1.01GB/s ± 3% ~ (p=0.351 n=40+33) RegexpMatchMedium_32-4 8.32MB/s ± 4% 8.34MB/s ± 5% ~ (p=0.696 n=40+40) RegexpMatchMedium_1K-4 25.6MB/s ± 3% 25.9MB/s ± 4% +1.36% (p=0.000 n=40+40) RegexpMatchHard_32-4 14.1MB/s ± 6% 14.3MB/s ± 4% +1.64% (p=0.011 n=40+40) RegexpMatchHard_1K-4 15.2MB/s ± 3% 15.2MB/s ± 3% ~ (p=0.147 n=40+40) Revcomp-4 138MB/s ± 2% 137MB/s ± 3% -0.70% (p=0.021 n=40+40) Template-4 28.1MB/s ± 4% 27.8MB/s ± 3% -1.19% (p=0.003 n=40+40) [Geo mean] 83.7MB/s 83.7MB/s +0.03% Change-Id: I2a2b3a942b5c45467491515d201179fd192e65c9 Reviewed-on: https://go-review.googlesource.com/c/141650 Run-TryBot: Ben Shi TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/cmd/compile/internal/ssa/gen/386.rules | 12 +- src/cmd/compile/internal/ssa/rewrite386.go | 751 ++++++++++++++++++++- test/codegen/memcombine.go | 18 + 3 files changed, 774 insertions(+), 7 deletions(-) diff --git a/src/cmd/compile/internal/ssa/gen/386.rules b/src/cmd/compile/internal/ssa/gen/386.rules index e8d19cf3c9..3a54a2a206 100644 --- a/src/cmd/compile/internal/ssa/gen/386.rules +++ b/src/cmd/compile/internal/ssa/gen/386.rules @@ -1151,10 +1151,14 @@ -> (MOVLstoreconstidx1 [makeValAndOff(ValAndOff(a).Val()&0xffff | ValAndOff(c).Val()<<16, ValAndOff(a).Off())] {s} p (SHLLconst [1] i) mem) // Combine stores into larger (unaligned) stores. -(MOVBstore [i] {s} p (SHRLconst [8] w) x:(MOVBstore [i-1] {s} p w mem)) +(MOVBstore [i] {s} p (SHR(W|L)const [8] w) x:(MOVBstore [i-1] {s} p w mem)) && x.Uses == 1 && clobber(x) -> (MOVWstore [i-1] {s} p w mem) +(MOVBstore [i] {s} p w x:(MOVBstore {s} [i+1] p (SHR(W|L)const [8] w) mem)) + && x.Uses == 1 + && clobber(x) + -> (MOVWstore [i] {s} p w mem) (MOVBstore [i] {s} p (SHRLconst [j] w) x:(MOVBstore [i-1] {s} p w0:(SHRLconst [j-8] w) mem)) && x.Uses == 1 && clobber(x) @@ -1168,10 +1172,14 @@ && clobber(x) -> (MOVLstore [i-2] {s} p w0 mem) -(MOVBstoreidx1 [i] {s} p idx (SHRLconst [8] w) x:(MOVBstoreidx1 [i-1] {s} p idx w mem)) +(MOVBstoreidx1 [i] {s} p idx (SHR(L|W)const [8] w) x:(MOVBstoreidx1 [i-1] {s} p idx w mem)) && x.Uses == 1 && clobber(x) -> (MOVWstoreidx1 [i-1] {s} p idx w mem) +(MOVBstoreidx1 [i] {s} p idx w x:(MOVBstoreidx1 [i+1] {s} p idx (SHR(L|W)const [8] w) mem)) + && x.Uses == 1 + && clobber(x) + -> (MOVWstoreidx1 [i] {s} p idx w mem) (MOVBstoreidx1 [i] {s} p idx (SHRLconst [j] w) x:(MOVBstoreidx1 [i-1] {s} p idx w0:(SHRLconst [j-8] w) mem)) && x.Uses == 1 && clobber(x) diff --git a/src/cmd/compile/internal/ssa/rewrite386.go b/src/cmd/compile/internal/ssa/rewrite386.go index 14784bef3a..2fce9c151e 100644 --- a/src/cmd/compile/internal/ssa/rewrite386.go +++ b/src/cmd/compile/internal/ssa/rewrite386.go @@ -106,13 +106,13 @@ func rewriteValue386(v *Value) bool { case Op386MOVBloadidx1: return rewriteValue386_Op386MOVBloadidx1_0(v) case Op386MOVBstore: - return rewriteValue386_Op386MOVBstore_0(v) + return rewriteValue386_Op386MOVBstore_0(v) || rewriteValue386_Op386MOVBstore_10(v) case Op386MOVBstoreconst: return rewriteValue386_Op386MOVBstoreconst_0(v) case Op386MOVBstoreconstidx1: return rewriteValue386_Op386MOVBstoreconstidx1_0(v) case Op386MOVBstoreidx1: - return rewriteValue386_Op386MOVBstoreidx1_0(v) || rewriteValue386_Op386MOVBstoreidx1_10(v) + return rewriteValue386_Op386MOVBstoreidx1_0(v) || rewriteValue386_Op386MOVBstoreidx1_10(v) || rewriteValue386_Op386MOVBstoreidx1_20(v) case Op386MOVLload: return rewriteValue386_Op386MOVLload_0(v) case Op386MOVLloadidx1: @@ -5545,6 +5545,51 @@ func rewriteValue386_Op386MOVBstore_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVBstore [i] {s} p (SHRWconst [8] w) x:(MOVBstore [i-1] {s} p w mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstore [i-1] {s} p w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[2] + p := v.Args[0] + v_1 := v.Args[1] + if v_1.Op != Op386SHRWconst { + break + } + if v_1.AuxInt != 8 { + break + } + w := v_1.Args[0] + x := v.Args[2] + if x.Op != Op386MOVBstore { + break + } + if x.AuxInt != i-1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[2] + if p != x.Args[0] { + break + } + if w != x.Args[1] { + break + } + mem := x.Args[2] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstore) + v.AuxInt = i - 1 + v.Aux = s + v.AddArg(p) + v.AddArg(w) + v.AddArg(mem) + return true + } // match: (MOVBstore [i] {s} p (SHRLconst [8] w) x:(MOVBstore [i-1] {s} p w mem)) // cond: x.Uses == 1 && clobber(x) // result: (MOVWstore [i-1] {s} p w mem) @@ -5590,6 +5635,99 @@ func rewriteValue386_Op386MOVBstore_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVBstore [i] {s} p w x:(MOVBstore {s} [i+1] p (SHRWconst [8] w) mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstore [i] {s} p w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[2] + p := v.Args[0] + w := v.Args[1] + x := v.Args[2] + if x.Op != Op386MOVBstore { + break + } + if x.AuxInt != i+1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[2] + if p != x.Args[0] { + break + } + x_1 := x.Args[1] + if x_1.Op != Op386SHRWconst { + break + } + if x_1.AuxInt != 8 { + break + } + if w != x_1.Args[0] { + break + } + mem := x.Args[2] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstore) + v.AuxInt = i + v.Aux = s + v.AddArg(p) + v.AddArg(w) + v.AddArg(mem) + return true + } + return false +} +func rewriteValue386_Op386MOVBstore_10(v *Value) bool { + // match: (MOVBstore [i] {s} p w x:(MOVBstore {s} [i+1] p (SHRLconst [8] w) mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstore [i] {s} p w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[2] + p := v.Args[0] + w := v.Args[1] + x := v.Args[2] + if x.Op != Op386MOVBstore { + break + } + if x.AuxInt != i+1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[2] + if p != x.Args[0] { + break + } + x_1 := x.Args[1] + if x_1.Op != Op386SHRLconst { + break + } + if x_1.AuxInt != 8 { + break + } + if w != x_1.Args[0] { + break + } + mem := x.Args[2] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstore) + v.AuxInt = i + v.Aux = s + v.AddArg(p) + v.AddArg(w) + v.AddArg(mem) + return true + } // match: (MOVBstore [i] {s} p (SHRLconst [j] w) x:(MOVBstore [i-1] {s} p w0:(SHRLconst [j-8] w) mem)) // cond: x.Uses == 1 && clobber(x) // result: (MOVWstore [i-1] {s} p w0 mem) @@ -6166,6 +6304,612 @@ func rewriteValue386_Op386MOVBstoreidx1_0(v *Value) bool { v.AddArg(mem) return true } + // match: (MOVBstoreidx1 [i] {s} p idx (SHRWconst [8] w) x:(MOVBstoreidx1 [i-1] {s} p idx w mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstoreidx1 [i-1] {s} p idx w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[3] + p := v.Args[0] + idx := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386SHRWconst { + break + } + if v_2.AuxInt != 8 { + break + } + w := v_2.Args[0] + x := v.Args[3] + if x.Op != Op386MOVBstoreidx1 { + break + } + if x.AuxInt != i-1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[3] + if p != x.Args[0] { + break + } + if idx != x.Args[1] { + break + } + if w != x.Args[2] { + break + } + mem := x.Args[3] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstoreidx1) + v.AuxInt = i - 1 + v.Aux = s + v.AddArg(p) + v.AddArg(idx) + v.AddArg(w) + v.AddArg(mem) + return true + } + // match: (MOVBstoreidx1 [i] {s} p idx (SHRWconst [8] w) x:(MOVBstoreidx1 [i-1] {s} idx p w mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstoreidx1 [i-1] {s} p idx w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[3] + p := v.Args[0] + idx := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386SHRWconst { + break + } + if v_2.AuxInt != 8 { + break + } + w := v_2.Args[0] + x := v.Args[3] + if x.Op != Op386MOVBstoreidx1 { + break + } + if x.AuxInt != i-1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[3] + if idx != x.Args[0] { + break + } + if p != x.Args[1] { + break + } + if w != x.Args[2] { + break + } + mem := x.Args[3] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstoreidx1) + v.AuxInt = i - 1 + v.Aux = s + v.AddArg(p) + v.AddArg(idx) + v.AddArg(w) + v.AddArg(mem) + return true + } + return false +} +func rewriteValue386_Op386MOVBstoreidx1_10(v *Value) bool { + // match: (MOVBstoreidx1 [i] {s} idx p (SHRWconst [8] w) x:(MOVBstoreidx1 [i-1] {s} p idx w mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstoreidx1 [i-1] {s} p idx w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[3] + idx := v.Args[0] + p := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386SHRWconst { + break + } + if v_2.AuxInt != 8 { + break + } + w := v_2.Args[0] + x := v.Args[3] + if x.Op != Op386MOVBstoreidx1 { + break + } + if x.AuxInt != i-1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[3] + if p != x.Args[0] { + break + } + if idx != x.Args[1] { + break + } + if w != x.Args[2] { + break + } + mem := x.Args[3] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstoreidx1) + v.AuxInt = i - 1 + v.Aux = s + v.AddArg(p) + v.AddArg(idx) + v.AddArg(w) + v.AddArg(mem) + return true + } + // match: (MOVBstoreidx1 [i] {s} idx p (SHRWconst [8] w) x:(MOVBstoreidx1 [i-1] {s} idx p w mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstoreidx1 [i-1] {s} p idx w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[3] + idx := v.Args[0] + p := v.Args[1] + v_2 := v.Args[2] + if v_2.Op != Op386SHRWconst { + break + } + if v_2.AuxInt != 8 { + break + } + w := v_2.Args[0] + x := v.Args[3] + if x.Op != Op386MOVBstoreidx1 { + break + } + if x.AuxInt != i-1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[3] + if idx != x.Args[0] { + break + } + if p != x.Args[1] { + break + } + if w != x.Args[2] { + break + } + mem := x.Args[3] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstoreidx1) + v.AuxInt = i - 1 + v.Aux = s + v.AddArg(p) + v.AddArg(idx) + v.AddArg(w) + v.AddArg(mem) + return true + } + // match: (MOVBstoreidx1 [i] {s} p idx w x:(MOVBstoreidx1 [i+1] {s} p idx (SHRLconst [8] w) mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstoreidx1 [i] {s} p idx w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[3] + p := v.Args[0] + idx := v.Args[1] + w := v.Args[2] + x := v.Args[3] + if x.Op != Op386MOVBstoreidx1 { + break + } + if x.AuxInt != i+1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[3] + if p != x.Args[0] { + break + } + if idx != x.Args[1] { + break + } + x_2 := x.Args[2] + if x_2.Op != Op386SHRLconst { + break + } + if x_2.AuxInt != 8 { + break + } + if w != x_2.Args[0] { + break + } + mem := x.Args[3] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstoreidx1) + v.AuxInt = i + v.Aux = s + v.AddArg(p) + v.AddArg(idx) + v.AddArg(w) + v.AddArg(mem) + return true + } + // match: (MOVBstoreidx1 [i] {s} p idx w x:(MOVBstoreidx1 [i+1] {s} idx p (SHRLconst [8] w) mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstoreidx1 [i] {s} p idx w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[3] + p := v.Args[0] + idx := v.Args[1] + w := v.Args[2] + x := v.Args[3] + if x.Op != Op386MOVBstoreidx1 { + break + } + if x.AuxInt != i+1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[3] + if idx != x.Args[0] { + break + } + if p != x.Args[1] { + break + } + x_2 := x.Args[2] + if x_2.Op != Op386SHRLconst { + break + } + if x_2.AuxInt != 8 { + break + } + if w != x_2.Args[0] { + break + } + mem := x.Args[3] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstoreidx1) + v.AuxInt = i + v.Aux = s + v.AddArg(p) + v.AddArg(idx) + v.AddArg(w) + v.AddArg(mem) + return true + } + // match: (MOVBstoreidx1 [i] {s} idx p w x:(MOVBstoreidx1 [i+1] {s} p idx (SHRLconst [8] w) mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstoreidx1 [i] {s} p idx w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[3] + idx := v.Args[0] + p := v.Args[1] + w := v.Args[2] + x := v.Args[3] + if x.Op != Op386MOVBstoreidx1 { + break + } + if x.AuxInt != i+1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[3] + if p != x.Args[0] { + break + } + if idx != x.Args[1] { + break + } + x_2 := x.Args[2] + if x_2.Op != Op386SHRLconst { + break + } + if x_2.AuxInt != 8 { + break + } + if w != x_2.Args[0] { + break + } + mem := x.Args[3] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstoreidx1) + v.AuxInt = i + v.Aux = s + v.AddArg(p) + v.AddArg(idx) + v.AddArg(w) + v.AddArg(mem) + return true + } + // match: (MOVBstoreidx1 [i] {s} idx p w x:(MOVBstoreidx1 [i+1] {s} idx p (SHRLconst [8] w) mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstoreidx1 [i] {s} p idx w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[3] + idx := v.Args[0] + p := v.Args[1] + w := v.Args[2] + x := v.Args[3] + if x.Op != Op386MOVBstoreidx1 { + break + } + if x.AuxInt != i+1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[3] + if idx != x.Args[0] { + break + } + if p != x.Args[1] { + break + } + x_2 := x.Args[2] + if x_2.Op != Op386SHRLconst { + break + } + if x_2.AuxInt != 8 { + break + } + if w != x_2.Args[0] { + break + } + mem := x.Args[3] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstoreidx1) + v.AuxInt = i + v.Aux = s + v.AddArg(p) + v.AddArg(idx) + v.AddArg(w) + v.AddArg(mem) + return true + } + // match: (MOVBstoreidx1 [i] {s} p idx w x:(MOVBstoreidx1 [i+1] {s} p idx (SHRWconst [8] w) mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstoreidx1 [i] {s} p idx w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[3] + p := v.Args[0] + idx := v.Args[1] + w := v.Args[2] + x := v.Args[3] + if x.Op != Op386MOVBstoreidx1 { + break + } + if x.AuxInt != i+1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[3] + if p != x.Args[0] { + break + } + if idx != x.Args[1] { + break + } + x_2 := x.Args[2] + if x_2.Op != Op386SHRWconst { + break + } + if x_2.AuxInt != 8 { + break + } + if w != x_2.Args[0] { + break + } + mem := x.Args[3] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstoreidx1) + v.AuxInt = i + v.Aux = s + v.AddArg(p) + v.AddArg(idx) + v.AddArg(w) + v.AddArg(mem) + return true + } + // match: (MOVBstoreidx1 [i] {s} p idx w x:(MOVBstoreidx1 [i+1] {s} idx p (SHRWconst [8] w) mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstoreidx1 [i] {s} p idx w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[3] + p := v.Args[0] + idx := v.Args[1] + w := v.Args[2] + x := v.Args[3] + if x.Op != Op386MOVBstoreidx1 { + break + } + if x.AuxInt != i+1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[3] + if idx != x.Args[0] { + break + } + if p != x.Args[1] { + break + } + x_2 := x.Args[2] + if x_2.Op != Op386SHRWconst { + break + } + if x_2.AuxInt != 8 { + break + } + if w != x_2.Args[0] { + break + } + mem := x.Args[3] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstoreidx1) + v.AuxInt = i + v.Aux = s + v.AddArg(p) + v.AddArg(idx) + v.AddArg(w) + v.AddArg(mem) + return true + } + // match: (MOVBstoreidx1 [i] {s} idx p w x:(MOVBstoreidx1 [i+1] {s} p idx (SHRWconst [8] w) mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstoreidx1 [i] {s} p idx w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[3] + idx := v.Args[0] + p := v.Args[1] + w := v.Args[2] + x := v.Args[3] + if x.Op != Op386MOVBstoreidx1 { + break + } + if x.AuxInt != i+1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[3] + if p != x.Args[0] { + break + } + if idx != x.Args[1] { + break + } + x_2 := x.Args[2] + if x_2.Op != Op386SHRWconst { + break + } + if x_2.AuxInt != 8 { + break + } + if w != x_2.Args[0] { + break + } + mem := x.Args[3] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstoreidx1) + v.AuxInt = i + v.Aux = s + v.AddArg(p) + v.AddArg(idx) + v.AddArg(w) + v.AddArg(mem) + return true + } + // match: (MOVBstoreidx1 [i] {s} idx p w x:(MOVBstoreidx1 [i+1] {s} idx p (SHRWconst [8] w) mem)) + // cond: x.Uses == 1 && clobber(x) + // result: (MOVWstoreidx1 [i] {s} p idx w mem) + for { + i := v.AuxInt + s := v.Aux + _ = v.Args[3] + idx := v.Args[0] + p := v.Args[1] + w := v.Args[2] + x := v.Args[3] + if x.Op != Op386MOVBstoreidx1 { + break + } + if x.AuxInt != i+1 { + break + } + if x.Aux != s { + break + } + _ = x.Args[3] + if idx != x.Args[0] { + break + } + if p != x.Args[1] { + break + } + x_2 := x.Args[2] + if x_2.Op != Op386SHRWconst { + break + } + if x_2.AuxInt != 8 { + break + } + if w != x_2.Args[0] { + break + } + mem := x.Args[3] + if !(x.Uses == 1 && clobber(x)) { + break + } + v.reset(Op386MOVWstoreidx1) + v.AuxInt = i + v.Aux = s + v.AddArg(p) + v.AddArg(idx) + v.AddArg(w) + v.AddArg(mem) + return true + } + return false +} +func rewriteValue386_Op386MOVBstoreidx1_20(v *Value) bool { // match: (MOVBstoreidx1 [i] {s} p idx (SHRLconst [j] w) x:(MOVBstoreidx1 [i-1] {s} p idx w0:(SHRLconst [j-8] w) mem)) // cond: x.Uses == 1 && clobber(x) // result: (MOVWstoreidx1 [i-1] {s} p idx w0 mem) @@ -6276,9 +7020,6 @@ func rewriteValue386_Op386MOVBstoreidx1_0(v *Value) bool { v.AddArg(mem) return true } - return false -} -func rewriteValue386_Op386MOVBstoreidx1_10(v *Value) bool { // match: (MOVBstoreidx1 [i] {s} idx p (SHRLconst [j] w) x:(MOVBstoreidx1 [i-1] {s} p idx w0:(SHRLconst [j-8] w) mem)) // cond: x.Uses == 1 && clobber(x) // result: (MOVWstoreidx1 [i-1] {s} p idx w0 mem) diff --git a/test/codegen/memcombine.go b/test/codegen/memcombine.go index 230aadfb74..d0043da7ef 100644 --- a/test/codegen/memcombine.go +++ b/test/codegen/memcombine.go @@ -113,11 +113,13 @@ func load_be16_idx(b []byte, idx int) { func load_le_byte2_uint16(s []byte) uint16 { // arm64:`MOVHU\t\(R[0-9]+\)`,-`ORR`,-`MOVB` + // 386:`MOVWLZX\s\([A-Z]+\)`,-`MOVB`,-`ORL` return uint16(s[0]) | uint16(s[1])<<8 } func load_le_byte2_uint16_inv(s []byte) uint16 { // arm64:`MOVHU\t\(R[0-9]+\)`,-`ORR`,-`MOVB` + // 386:`MOVWLZX\s\([A-Z]+\)`,-`MOVB`,-`ORL` return uint16(s[1])<<8 | uint16(s[0]) } @@ -173,11 +175,13 @@ func load_be_byte8_uint64_inv(s []byte) uint64 { func load_le_byte2_uint16_idx(s []byte, idx int) uint16 { // arm64:`MOVHU\s\(R[0-9]+\)\(R[0-9]+\)`,-`ORR`,-`MOVB` + // 386:`MOVWLZX\s\([A-Z]+\)\([A-Z]+`,-`ORL`,-`MOVB` return uint16(s[idx]) | uint16(s[idx+1])<<8 } func load_le_byte2_uint16_idx_inv(s []byte, idx int) uint16 { // arm64:`MOVHU\s\(R[0-9]+\)\(R[0-9]+\)`,-`ORR`,-`MOVB` + // 386:`MOVWLZX\s\([A-Z]+\)\([A-Z]+`,-`ORL`,-`MOVB` return uint16(s[idx+1])<<8 | uint16(s[idx]) } @@ -405,9 +409,16 @@ func store_be16_idx(b []byte, idx int) { func store_le_byte_2(b []byte, val uint16) { _ = b[2] // arm64:`MOVH\sR[0-9]+,\s1\(R[0-9]+\)`,-`MOVB` + // 386:`MOVW\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB` b[1], b[2] = byte(val), byte(val>>8) } +func store_le_byte_2_inv(b []byte, val uint16) { + _ = b[2] + // 386:`MOVW\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB` + b[2], b[1] = byte(val>>8), byte(val) +} + func store_le_byte_4(b []byte, val uint32) { _ = b[4] // arm64:`MOVW\sR[0-9]+,\s1\(R[0-9]+\)`,-`MOVB`,-`MOVH` @@ -441,9 +452,16 @@ func store_be_byte_8(b []byte, val uint64) { func store_le_byte_2_idx(b []byte, idx int, val uint16) { _, _ = b[idx+0], b[idx+1] // arm64:`MOVH\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+\)`,-`MOVB` + // 386:`MOVW\s[A-Z]+,\s\([A-Z]+\)\([A-Z]+`,-`MOVB` b[idx+1], b[idx+0] = byte(val>>8), byte(val) } +func store_le_byte_2_idx_inv(b []byte, idx int, val uint16) { + _, _ = b[idx+0], b[idx+1] + // 386:`MOVW\s[A-Z]+,\s\([A-Z]+\)\([A-Z]+`,-`MOVB` + b[idx+0], b[idx+1] = byte(val), byte(val>>8) +} + func store_le_byte_4_idx(b []byte, idx int, val uint32) { _, _, _, _ = b[idx+0], b[idx+1], b[idx+2], b[idx+3] // arm64:`MOVW\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+\)`,-`MOVB`,-`MOVH` From 5eff6bfdbc837f8099503566ffe52e5174e804a7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Mart=C3=AD?= Date: Tue, 16 Oct 2018 12:04:55 +0100 Subject: [PATCH 146/240] encoding/json: fix "data changed underfoot?" panic Given a program as follows: data := []byte(`{"F": { "a": 2, "3": 4 }}`) json.Unmarshal(data, &map[string]map[int]int{}) The JSON package should error, as "a" is not a valid integer. However, we'd encounter a panic: panic: JSON decoder out of sync - data changing underfoot? The reason was that decodeState.object would return a nil error on encountering the invalid map key string, while saving the key type error for later. This broke if we were inside another object, as we would abruptly end parsing the nested object, leaving the decoder in an unexpected state. To fix this, simply avoid storing the map element and continue decoding the object, to leave the decoder state exactly as if we hadn't seen an invalid key type. This affected both signed and unsigned integer keys, so fix both and add two test cases. Updates #28189. Change-Id: I8a6204cc3ff9fb04ed769df7a20a824c8b94faff Reviewed-on: https://go-review.googlesource.com/c/142518 Reviewed-by: Ian Lance Taylor --- src/encoding/json/decode.go | 8 +++++--- src/encoding/json/decode_test.go | 10 ++++++++++ 2 files changed, 15 insertions(+), 3 deletions(-) diff --git a/src/encoding/json/decode.go b/src/encoding/json/decode.go index cab4616ba3..6608415e13 100644 --- a/src/encoding/json/decode.go +++ b/src/encoding/json/decode.go @@ -786,7 +786,7 @@ func (d *decodeState) object(v reflect.Value) error { n, err := strconv.ParseInt(s, 10, 64) if err != nil || reflect.Zero(kt).OverflowInt(n) { d.saveError(&UnmarshalTypeError{Value: "number " + s, Type: kt, Offset: int64(start + 1)}) - return nil + break } kv = reflect.ValueOf(n).Convert(kt) case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr: @@ -794,14 +794,16 @@ func (d *decodeState) object(v reflect.Value) error { n, err := strconv.ParseUint(s, 10, 64) if err != nil || reflect.Zero(kt).OverflowUint(n) { d.saveError(&UnmarshalTypeError{Value: "number " + s, Type: kt, Offset: int64(start + 1)}) - return nil + break } kv = reflect.ValueOf(n).Convert(kt) default: panic("json: Unexpected key type") // should never occur } } - v.SetMapIndex(kv, subv) + if kv.IsValid() { + v.SetMapIndex(kv, subv) + } } // Next token must be , or }. diff --git a/src/encoding/json/decode_test.go b/src/encoding/json/decode_test.go index 5fbe67a706..70731a62d6 100644 --- a/src/encoding/json/decode_test.go +++ b/src/encoding/json/decode_test.go @@ -554,6 +554,16 @@ var unmarshalTests = []unmarshalTest{ ptr: new(map[uint8]string), err: &UnmarshalTypeError{Value: "number -1", Type: reflect.TypeOf(uint8(0)), Offset: 2}, }, + { + in: `{"F":{"a":2,"3":4}}`, + ptr: new(map[string]map[int]int), + err: &UnmarshalTypeError{Value: "number a", Type: reflect.TypeOf(int(0)), Offset: 7}, + }, + { + in: `{"F":{"a":2,"3":4}}`, + ptr: new(map[string]map[uint]int), + err: &UnmarshalTypeError{Value: "number a", Type: reflect.TypeOf(uint(0)), Offset: 7}, + }, // Map keys can be encoding.TextUnmarshalers. {in: `{"x:y":true}`, ptr: &ummapType, out: ummapXY}, From 4b36e129f865f802eb87f7aa2b25e3297c5d8cfd Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Mart=C3=AD?= Date: Thu, 11 Oct 2018 14:43:47 +0100 Subject: [PATCH 147/240] encoding/json: always verify we can get a field's value MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Calling .Interface on a struct field's reflect.Value isn't always safe. For example, if that field is an unexported anonymous struct. We only descended into this branch if the struct type had any methods, so this bug had gone unnoticed for a few release cycles. Add the check, and add a simple test case. Fixes #28145. Change-Id: I02f7e0ab9a4a0c18a5e2164211922fe9c3d30f64 Reviewed-on: https://go-review.googlesource.com/c/141537 Run-TryBot: Daniel Martí TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/encoding/json/decode.go | 2 +- src/encoding/json/decode_test.go | 15 +++++++++++++++ 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/src/encoding/json/decode.go b/src/encoding/json/decode.go index 6608415e13..731553dca6 100644 --- a/src/encoding/json/decode.go +++ b/src/encoding/json/decode.go @@ -473,7 +473,7 @@ func indirect(v reflect.Value, decodingNull bool) (Unmarshaler, encoding.TextUnm if v.IsNil() { v.Set(reflect.New(v.Type().Elem())) } - if v.Type().NumMethod() > 0 { + if v.Type().NumMethod() > 0 && v.CanInterface() { if u, ok := v.Interface().(Unmarshaler); ok { return u, nil, reflect.Value{} } diff --git a/src/encoding/json/decode_test.go b/src/encoding/json/decode_test.go index 70731a62d6..54432600a5 100644 --- a/src/encoding/json/decode_test.go +++ b/src/encoding/json/decode_test.go @@ -266,6 +266,10 @@ type XYZ struct { Z interface{} } +type unexportedWithMethods struct{} + +func (unexportedWithMethods) F() {} + func sliceAddr(x []int) *[]int { return &x } func mapAddr(x map[string]int) *map[string]int { return &x } @@ -2151,6 +2155,9 @@ func TestInvalidStringOption(t *testing.T) { // // (Issue 24152) If the embedded struct is given an explicit name, // ensure that the normal unmarshal logic does not panic in reflect. +// +// (Issue 28145) If the embedded struct is given an explicit name and has +// exported methods, don't cause a panic trying to get its value. func TestUnmarshalEmbeddedUnexported(t *testing.T) { type ( embed1 struct{ Q int } @@ -2190,6 +2197,9 @@ func TestUnmarshalEmbeddedUnexported(t *testing.T) { embed2 `json:"embed2"` Q int } + S9 struct { + unexportedWithMethods `json:"embed"` + } ) tests := []struct { @@ -2251,6 +2261,11 @@ func TestUnmarshalEmbeddedUnexported(t *testing.T) { in: `{"embed1": {"Q": 1}, "embed2": {"Q": 2}, "Q": 3}`, ptr: new(S8), out: &S8{embed1{1}, embed2{2}, 3}, + }, { + // Issue 228145, similar to the cases above. + in: `{"embed": {}}`, + ptr: new(S9), + out: &S9{}, }} for i, tt := range tests { From 39fa301bdc5cd99e4f71d7da5f6f38a6f313d611 Mon Sep 17 00:00:00 2001 From: Lynn Boger Date: Mon, 15 Oct 2018 12:53:07 -0400 Subject: [PATCH 148/240] test/codegen: enable more tests for ppc64/ppc64le Adding cases for ppc64,ppc64le to the codegen tests where appropriate. Change-Id: Idf8cbe88a4ab4406a4ef1ea777bd15a58b68f3ed Reviewed-on: https://go-review.googlesource.com/c/142557 Run-TryBot: Lynn Boger TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- test/codegen/arithmetic.go | 22 +++++++++++++++++++ test/codegen/comparisons.go | 1 + test/codegen/copy.go | 7 +++++++ test/codegen/floats.go | 12 +++++++++++ test/codegen/math.go | 15 +++++++++++++ test/codegen/mathbits.go | 20 ++++++++++++++++-- test/codegen/noextend.go | 42 +++++++++++++++++++++++++++++++++++++ test/codegen/rotate.go | 8 +++++++ test/codegen/stack.go | 5 +++++ 9 files changed, 130 insertions(+), 2 deletions(-) diff --git a/test/codegen/arithmetic.go b/test/codegen/arithmetic.go index b1cdef6eee..d91eb16edb 100644 --- a/test/codegen/arithmetic.go +++ b/test/codegen/arithmetic.go @@ -48,12 +48,16 @@ func Pow2Muls(n1, n2 int) (int, int) { // 386:"SHLL\t[$]5",-"IMULL" // arm:"SLL\t[$]5",-"MUL" // arm64:"LSL\t[$]5",-"MUL" + // ppc64:"SLD\t[$]5",-"MUL" + // ppc64le:"SLD\t[$]5",-"MUL" a := n1 * 32 // amd64:"SHLQ\t[$]6",-"IMULQ" // 386:"SHLL\t[$]6",-"IMULL" // arm:"SLL\t[$]6",-"MUL" // arm64:`NEG\sR[0-9]+<<6,\sR[0-9]+`,-`LSL`,-`MUL` + // ppc64:"SLD\t[$]6","NEG\\sR[0-9]+,\\sR[0-9]+",-"MUL" + // ppc64le:"SLD\t[$]6","NEG\\sR[0-9]+,\\sR[0-9]+",-"MUL" b := -64 * n2 return a, b @@ -117,12 +121,16 @@ func Pow2Divs(n1 uint, n2 int) (uint, int) { // amd64:"SHRQ\t[$]5",-"DIVQ" // arm:"SRL\t[$]5",-".*udiv" // arm64:"LSR\t[$]5",-"UDIV" + // ppc64:"SRD" + // ppc64le:"SRD" a := n1 / 32 // unsigned // amd64:"SARQ\t[$]6",-"IDIVQ" // 386:"SARL\t[$]6",-"IDIVL" // arm:"SRA\t[$]6",-".*udiv" // arm64:"ASR\t[$]6",-"SDIV" + // ppc64:"SRAD" + // ppc64le:"SRAD" b := n2 / 64 // signed return a, b @@ -149,6 +157,8 @@ func Pow2Mods(n1 uint, n2 int) (uint, int) { // amd64:"ANDQ\t[$]31",-"DIVQ" // arm:"AND\t[$]31",-".*udiv" // arm64:"AND\t[$]31",-"UDIV" + // ppc64:"ANDCC\t[$]31" + // ppc64le:"ANDCC\t[$]31" a := n1 % 32 // unsigned // 386:-"IDIVL" @@ -177,36 +187,48 @@ func ConstMods(n1 uint, n2 int) (uint, int) { func LenDiv1(a []int) int { // 386:"SHRL\t[$]10" // amd64:"SHRQ\t[$]10" + // ppc64:"SRD"\t[$]10" + // ppc64le:"SRD"\t[$]10" return len(a) / 1024 } func LenDiv2(s string) int { // 386:"SHRL\t[$]11" // amd64:"SHRQ\t[$]11" + // ppc64:"SRD\t[$]11" + // ppc64le:"SRD\t[$]11" return len(s) / (4097 >> 1) } func LenMod1(a []int) int { // 386:"ANDL\t[$]1023" // amd64:"ANDQ\t[$]1023" + // ppc64:"ANDCC\t[$]1023" + // ppc64le:"ANDCC\t[$]1023" return len(a) % 1024 } func LenMod2(s string) int { // 386:"ANDL\t[$]2047" // amd64:"ANDQ\t[$]2047" + // ppc64:"ANDCC\t[$]2047" + // ppc64le:"ANDCC\t[$]2047" return len(s) % (4097 >> 1) } func CapDiv(a []int) int { // 386:"SHRL\t[$]12" // amd64:"SHRQ\t[$]12" + // ppc64:"SRD\t[$]12" + // ppc64le:"SRD\t[$]12" return cap(a) / ((1 << 11) + 2048) } func CapMod(a []int) int { // 386:"ANDL\t[$]4095" // amd64:"ANDQ\t[$]4095" + // ppc64:"ANDCC\t[$]4095" + // ppc64le:"ANDCC\t[$]4095" return cap(a) % ((1 << 11) + 2048) } diff --git a/test/codegen/comparisons.go b/test/codegen/comparisons.go index 072393f3a6..fb17d3ca5d 100644 --- a/test/codegen/comparisons.go +++ b/test/codegen/comparisons.go @@ -36,6 +36,7 @@ func CompareString2(s string) bool { func CompareString3(s string) bool { // amd64:`CMPQ\t\(.*\), [A-Z]` // arm64:-`CMPW\t` + // ppc64:-`CMPW\t` // ppc64le:-`CMPW\t` // s390x:-`CMPW\t` return s == "xxxxxxxx" diff --git a/test/codegen/copy.go b/test/codegen/copy.go index dc8ee43f4c..46c2bde9ab 100644 --- a/test/codegen/copy.go +++ b/test/codegen/copy.go @@ -16,6 +16,8 @@ func movesmall4() { // amd64:-".*memmove" // arm:-".*memmove" // arm64:-".*memmove" + // ppc64:-".*memmove" + // ppc64le:-".*memmove" copy(x[1:], x[:]) } @@ -24,6 +26,8 @@ func movesmall7() { // 386:-".*memmove" // amd64:-".*memmove" // arm64:-".*memmove" + // ppc64:-".*memmove" + // ppc64le:-".*memmove" copy(x[1:], x[:]) } @@ -63,6 +67,7 @@ func moveDisjointNoOverlap(a *[256]byte) { func ptrEqual() { // amd64:-"JEQ",-"JNE" + // ppc64:-"BEQ",-"BNE" // ppc64le:-"BEQ",-"BNE" // s390x:-"BEQ",-"BNE" copy(x[:], x[:]) @@ -70,6 +75,7 @@ func ptrEqual() { func ptrOneOffset() { // amd64:-"JEQ",-"JNE" + // ppc64:-"BEQ",-"BNE" // ppc64le:-"BEQ",-"BNE" // s390x:-"BEQ",-"BNE" copy(x[1:], x[:]) @@ -77,6 +83,7 @@ func ptrOneOffset() { func ptrBothOffset() { // amd64:-"JEQ",-"JNE" + // ppc64:-"BEQ",-"BNE" // ppc64le:-"BEQ",-"BNE" // s390x:-"BEQ",-"BNE" copy(x[1:], x[2:]) diff --git a/test/codegen/floats.go b/test/codegen/floats.go index c20f6984bf..5e1f60b08b 100644 --- a/test/codegen/floats.go +++ b/test/codegen/floats.go @@ -22,6 +22,8 @@ func Mul2(f float64) float64 { // amd64:"ADDSD",-"MULSD" // arm/7:"ADDD",-"MULD" // arm64:"FADDD",-"FMULD" + // ppc64:"FADD",-"FMUL" + // ppc64le:"FADD",-"FMUL" return f * 2.0 } @@ -31,6 +33,8 @@ func DivPow2(f1, f2, f3 float64) (float64, float64, float64) { // amd64:"MULSD",-"DIVSD" // arm/7:"MULD",-"DIVD" // arm64:"FMULD",-"FDIVD" + // ppc64:"FMUL",-"FDIV" + // ppc64le:"FMUL",-"FDIV" x := f1 / 16.0 // 386/sse2:"MULSD",-"DIVSD" @@ -38,6 +42,8 @@ func DivPow2(f1, f2, f3 float64) (float64, float64, float64) { // amd64:"MULSD",-"DIVSD" // arm/7:"MULD",-"DIVD" // arm64:"FMULD",-"FDIVD" + // ppc64:"FMUL",-"FDIVD" + // ppc64le:"FMUL",-"FDIVD" y := f2 / 0.125 // 386/sse2:"ADDSD",-"DIVSD",-"MULSD" @@ -45,6 +51,8 @@ func DivPow2(f1, f2, f3 float64) (float64, float64, float64) { // amd64:"ADDSD",-"DIVSD",-"MULSD" // arm/7:"ADDD",-"MULD",-"DIVD" // arm64:"FADDD",-"FMULD",-"FDIVD" + // ppc64:"FADD",-"FMUL",-"FDIV" + // ppc64le:"FADD",-"FMUL",-"FDIV" z := f3 / 0.5 return x, y, z @@ -71,6 +79,7 @@ func indexStore(b0 []float64, b1 float64, idx int) { func FusedAdd32(x, y, z float32) float32 { // s390x:"FMADDS\t" + // ppc64:"FMADDS\t" // ppc64le:"FMADDS\t" // arm64:"FMADDS" return x*y + z @@ -78,6 +87,7 @@ func FusedAdd32(x, y, z float32) float32 { func FusedSub32_a(x, y, z float32) float32 { // s390x:"FMSUBS\t" + // ppc64:"FMSUBS\t" // ppc64le:"FMSUBS\t" return x*y - z } @@ -89,6 +99,7 @@ func FusedSub32_b(x, y, z float32) float32 { func FusedAdd64(x, y, z float64) float64 { // s390x:"FMADD\t" + // ppc64:"FMADD\t" // ppc64le:"FMADD\t" // arm64:"FMADDD" return x*y + z @@ -96,6 +107,7 @@ func FusedAdd64(x, y, z float64) float64 { func FusedSub64_a(x, y, z float64) float64 { // s390x:"FMSUB\t" + // ppc64:"FMSUB\t" // ppc64le:"FMSUB\t" return x*y - z } diff --git a/test/codegen/math.go b/test/codegen/math.go index 78e7bfa110..aaf6b080ff 100644 --- a/test/codegen/math.go +++ b/test/codegen/math.go @@ -13,21 +13,25 @@ var sink64 [8]float64 func approx(x float64) { // s390x:"FIDBR\t[$]6" // arm64:"FRINTPD" + // ppc64:"FRIP" // ppc64le:"FRIP" sink64[0] = math.Ceil(x) // s390x:"FIDBR\t[$]7" // arm64:"FRINTMD" + // ppc64:"FRIM" // ppc64le:"FRIM" sink64[1] = math.Floor(x) // s390x:"FIDBR\t[$]1" // arm64:"FRINTAD" + // ppc64:"FRIN" // ppc64le:"FRIN" sink64[2] = math.Round(x) // s390x:"FIDBR\t[$]5" // arm64:"FRINTZD" + // ppc64:"FRIZ" // ppc64le:"FRIZ" sink64[3] = math.Trunc(x) @@ -51,11 +55,13 @@ func abs(x, y float64) { // amd64:"BTRQ\t[$]63" // arm64:"FABSD\t" // s390x:"LPDFR\t",-"MOVD\t" (no integer load/store) + // ppc64:"FABS\t" // ppc64le:"FABS\t" sink64[0] = math.Abs(x) // amd64:"BTRQ\t[$]63","PXOR" (TODO: this should be BTSQ) // s390x:"LNDFR\t",-"MOVD\t" (no integer load/store) + // ppc64:"FNABS\t" // ppc64le:"FNABS\t" sink64[1] = -math.Abs(y) } @@ -70,11 +76,13 @@ func abs32(x float32) float32 { func copysign(a, b, c float64) { // amd64:"BTRQ\t[$]63","SHRQ\t[$]63","SHLQ\t[$]63","ORQ" // s390x:"CPSDR",-"MOVD" (no integer load/store) + // ppc64:"FCPSGN" // ppc64le:"FCPSGN" sink64[0] = math.Copysign(a, b) // amd64:"BTSQ\t[$]63" // s390x:"LNDFR\t",-"MOVD\t" (no integer load/store) + // ppc64:"FCPSGN" // ppc64le:"FCPSGN" // arm64:"ORR", -"AND" sink64[1] = math.Copysign(c, -1) @@ -86,6 +94,7 @@ func copysign(a, b, c float64) { // amd64:-"SHLQ\t[$]1",-"SHRQ\t[$]1","SHRQ\t[$]63","SHLQ\t[$]63","ORQ" // s390x:"CPSDR\t",-"MOVD\t" (no integer load/store) + // ppc64:"FCPSGN" // ppc64le:"FCPSGN" sink64[3] = math.Copysign(-1, c) } @@ -93,6 +102,8 @@ func copysign(a, b, c float64) { func fromFloat64(f64 float64) uint64 { // amd64:"MOVQ\tX.*, [^X].*" // arm64:"FMOVD\tF.*, R.*" + // ppc64:"MFVSRD" + // ppc64le:"MFVSRD" return math.Float64bits(f64+1) + 1 } @@ -105,6 +116,8 @@ func fromFloat32(f32 float32) uint32 { func toFloat64(u64 uint64) float64 { // amd64:"MOVQ\t[^X].*, X.*" // arm64:"FMOVD\tR.*, F.*" + // ppc64:"MTVSRD" + // ppc64le:"MTVSRD" return math.Float64frombits(u64+1) + 1 } @@ -135,6 +148,7 @@ func constantCheck32() bool { func constantConvert32(x float32) float32 { // amd64:"MOVSS\t[$]f32.3f800000\\(SB\\)" // s390x:"FMOVS\t[$]f32.3f800000\\(SB\\)" + // ppc64:"FMOVS\t[$]f32.3f800000\\(SB\\)" // ppc64le:"FMOVS\t[$]f32.3f800000\\(SB\\)" // arm64:"FMOVS\t[$]\\(1.0\\)" if x > math.Float32frombits(0x3f800000) { @@ -146,6 +160,7 @@ func constantConvert32(x float32) float32 { func constantConvertInt32(x uint32) uint32 { // amd64:-"MOVSS" // s390x:-"FMOVS" + // ppc64:-"FMOVS" // ppc64le:-"FMOVS" // arm64:-"FMOVS" if x > math.Float32bits(1) { diff --git a/test/codegen/mathbits.go b/test/codegen/mathbits.go index 89a77d96f9..c21de19707 100644 --- a/test/codegen/mathbits.go +++ b/test/codegen/mathbits.go @@ -105,6 +105,7 @@ func OnesCount(n uint) int { // arm64:"VCNT","VUADDLV" // s390x:"POPCNT" // ppc64:"POPCNTD" + // ppc64le:"POPCNTD" return bits.OnesCount(n) } @@ -113,6 +114,7 @@ func OnesCount64(n uint64) int { // arm64:"VCNT","VUADDLV" // s390x:"POPCNT" // ppc64:"POPCNTD" + // ppc64le:"POPCNTD" return bits.OnesCount64(n) } @@ -121,6 +123,7 @@ func OnesCount32(n uint32) int { // arm64:"VCNT","VUADDLV" // s390x:"POPCNT" // ppc64:"POPCNTW" + // ppc64le:"POPCNTW" return bits.OnesCount32(n) } @@ -129,12 +132,14 @@ func OnesCount16(n uint16) int { // arm64:"VCNT","VUADDLV" // s390x:"POPCNT" // ppc64:"POPCNTW" + // ppc64le:"POPCNTW" return bits.OnesCount16(n) } func OnesCount8(n uint8) int { // s390x:"POPCNT" // ppc64:"POPCNTB" + // ppc64le:"POPCNTB" return bits.OnesCount8(n) } @@ -176,6 +181,7 @@ func RotateLeft64(n uint64) uint64 { // amd64:"ROLQ" // arm64:"ROR" // ppc64:"ROTL" + // ppc64le:"ROTL" // s390x:"RLLG" return bits.RotateLeft64(n, 37) } @@ -184,6 +190,7 @@ func RotateLeft32(n uint32) uint32 { // amd64:"ROLL" 386:"ROLL" // arm64:"RORW" // ppc64:"ROTLW" + // ppc64le:"ROTLW" // s390x:"RLL" return bits.RotateLeft32(n, 9) } @@ -202,6 +209,7 @@ func RotateLeftVariable(n uint, m int) uint { // amd64:"ROLQ" // arm64:"ROR" // ppc64:"ROTL" + // ppc64le:"ROTL" // s390x:"RLLG" return bits.RotateLeft(n, m) } @@ -210,6 +218,7 @@ func RotateLeftVariable64(n uint64, m int) uint64 { // amd64:"ROLQ" // arm64:"ROR" // ppc64:"ROTL" + // ppc64le:"ROTL" // s390x:"RLLG" return bits.RotateLeft64(n, m) } @@ -218,6 +227,7 @@ func RotateLeftVariable32(n uint32, m int) uint32 { // amd64:"ROLL" // arm64:"RORW" // ppc64:"ROTLW" + // ppc64le:"ROTLW" // s390x:"RLL" return bits.RotateLeft32(n, m) } @@ -230,6 +240,7 @@ func TrailingZeros(n uint) int { // amd64:"BSFQ","MOVL\t\\$64","CMOVQEQ" // s390x:"FLOGR" // ppc64:"ANDN","POPCNTD" + // ppc64le:"ANDN","POPCNTD" return bits.TrailingZeros(n) } @@ -237,6 +248,7 @@ func TrailingZeros64(n uint64) int { // amd64:"BSFQ","MOVL\t\\$64","CMOVQEQ" // s390x:"FLOGR" // ppc64:"ANDN","POPCNTD" + // ppc64le:"ANDN","POPCNTD" return bits.TrailingZeros64(n) } @@ -244,6 +256,7 @@ func TrailingZeros32(n uint32) int { // amd64:"BTSQ\\t\\$32","BSFQ" // s390x:"FLOGR","MOVWZ" // ppc64:"ANDN","POPCNTW" + // ppc64le:"ANDN","POPCNTW" return bits.TrailingZeros32(n) } @@ -251,6 +264,7 @@ func TrailingZeros16(n uint16) int { // amd64:"BSFL","BTSL\\t\\$16" // s390x:"FLOGR","OR\t\\$65536" // ppc64:"POPCNTD","OR\\t\\$65536" + // ppc64le:"POPCNTD","OR\\t\\$65536" return bits.TrailingZeros16(n) } @@ -319,13 +333,15 @@ func IterateBits8(n uint8) int { func Mul(x, y uint) (hi, lo uint) { // amd64:"MULQ" // arm64:"UMULH","MUL" - // ppc64: "MULHDU", "MULLD" + // ppc64:"MULHDU","MULLD" + // ppc64le:"MULHDU","MULLD" return bits.Mul(x, y) } func Mul64(x, y uint64) (hi, lo uint64) { // amd64:"MULQ" // arm64:"UMULH","MUL" - // ppc64: "MULHDU", "MULLD" + // ppc64:"MULHDU","MULLD" + // ppc64le:"MULHDU","MULLD" return bits.Mul64(x, y) } diff --git a/test/codegen/noextend.go b/test/codegen/noextend.go index ee4900226c..46bfe3f2f9 100644 --- a/test/codegen/noextend.go +++ b/test/codegen/noextend.go @@ -21,30 +21,38 @@ var val8 [8]uint8 func set16(x8 int8, u8 uint8, y8 int8, z8 uint8) { // Truncate not needed, load does sign/zero extend + // ppc64:-"MOVB\tR\\d+,\\sR\\d+" // ppc64le:-"MOVB\tR\\d+,\\sR\\d+" sval16[0] = int16(x8) + // ppc64:-"MOVBZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+" val16[0] = uint16(u8) // AND not needed due to size + // ppc64:-"ANDCC" // ppc64le:-"ANDCC" sval16[1] = 255 & int16(x8+y8) + // ppc64:-"ANDCC" // ppc64le:-"ANDCC" val16[1] = 255 & uint16(u8+z8) } func shiftidx(x8 int8, u8 uint8, x16 int16, u16 uint16, x32 int32, u32 uint32) { + // ppc64:-"MOVB\tR\\d+,\\sR\\d+" // ppc64le:-"MOVB\tR\\d+,\\sR\\d+" sval16[0] = int16(val16[x8>>1]) + // ppc64:-"MOVBZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+" val16[0] = uint16(sval16[u8>>2]) + // ppc64:-"MOVH\tR\\d+,\\sR\\d+" // ppc64le:-"MOVH\tR\\d+,\\sR\\d+" sval16[1] = int16(val16[x16>>1]) + // ppc64:-"MOVHZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+" val16[1] = uint16(sval16[u16>>2]) @@ -53,87 +61,109 @@ func shiftidx(x8 int8, u8 uint8, x16 int16, u16 uint16, x32 int32, u32 uint32) { func setnox(x8 int8, u8 uint8, y8 int8, z8 uint8, x16 int16, u16 uint16, x32 int32, u32 uint32) { // Truncate not needed due to sign/zero extension on load + // ppc64:-"MOVB\tR\\d+,\\sR\\d+" // ppc64le:-"MOVB\tR\\d+,\\sR\\d+" sval16[0] = int16(x8) + // ppc64:-"MOVBZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+" val16[0] = uint16(u8) // AND not needed due to size + // ppc64:-"ANDCC" // ppc64le:-"ANDCC" sval16[1] = 255 & int16(x8+y8) + // ppc64:-"ANDCC" // ppc64le:-"ANDCC" val16[1] = 255 & uint16(u8+z8) + // ppc64:-"MOVB\tR\\d+,\\sR\\d+" // ppc64le:-"MOVB\tR\\d+,\\sR\\d+" sval32[0] = int32(x8) + // ppc64:-"MOVH\tR\\d+,\\sR\\d+" // ppc64le:-"MOVH\tR\\d+,\\sR\\d+" sval32[1] = int32(x16) + //ppc64:-"MOVBZ\tR\\d+,\\sR\\d+" //ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+" val32[0] = uint32(u8) + // ppc64:-"MOVHZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+" val32[1] = uint32(u16) + // ppc64:-"MOVB\tR\\d+,\\sR\\d+" // ppc64le:-"MOVB\tR\\d+,\\sR\\d+" sval64[0] = int64(x8) + // ppc64:-"MOVH\tR\\d+,\\sR\\d+" // ppc64le:-"MOVH\tR\\d+,\\sR\\d+" sval64[1] = int64(x16) + // ppc64:-"MOVW\tR\\d+,\\sR\\d+" // ppc64le:-"MOVW\tR\\d+,\\sR\\d+" sval64[2] = int64(x32) + //ppc64:-"MOVBZ\tR\\d+,\\sR\\d+" //ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+" val64[0] = uint64(u8) + // ppc64:-"MOVHZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+" val64[1] = uint64(u16) + // ppc64:-"MOVWZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVWZ\tR\\d+,\\sR\\d+" val64[2] = uint64(u32) } func cmp16(x8 int8, u8 uint8, x32 int32, u32 uint32, x64 int64, u64 uint64) bool { + // ppc64:-"MOVB\tR\\d+,\\sR\\d+" // ppc64le:-"MOVB\tR\\d+,\\sR\\d+" if int16(x8) == sval16[0] { return true } + // ppc64:-"MOVBZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+" if uint16(u8) == val16[0] { return true } + // ppc64:-"MOVHZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+" if uint16(u32>>16) == val16[0] { return true } + // ppc64:-"MOVHZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+" if uint16(u64>>48) == val16[0] { return true } // Verify the truncates are using the correct sign. + // ppc64:-"MOVHZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+" if int16(x32) == sval16[0] { return true } + // ppc64:-"MOVH\tR\\d+,\\sR\\d+" // ppc64le:-"MOVH\tR\\d+,\\sR\\d+" if uint16(u32) == val16[0] { return true } + // ppc64:-"MOVHZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+" if int16(x64) == sval16[0] { return true } + // ppc64:-"MOVH\tR\\d+,\\sR\\d+" // ppc64le:-"MOVH\tR\\d+,\\sR\\d+" if uint16(u64) == val16[0] { return true @@ -143,32 +173,38 @@ func cmp16(x8 int8, u8 uint8, x32 int32, u32 uint32, x64 int64, u64 uint64) bool } func cmp32(x8 int8, u8 uint8, x16 int16, u16 uint16, x64 int64, u64 uint64) bool { + // ppc64:-"MOVB\tR\\d+,\\sR\\d+" // ppc64le:-"MOVB\tR\\d+,\\sR\\d+" if int32(x8) == sval32[0] { return true } + // ppc64:-"MOVBZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+" if uint32(u8) == val32[0] { return true } + // ppc64:-"MOVH\tR\\d+,\\sR\\d+" // ppc64le:-"MOVH\tR\\d+,\\sR\\d+" if int32(x16) == sval32[0] { return true } + // ppc64:-"MOVHZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+" if uint32(u16) == val32[0] { return true } // Verify the truncates are using the correct sign. + // ppc64:-"MOVWZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVWZ\tR\\d+,\\sR\\d+" if int32(x64) == sval32[0] { return true } + // ppc64:-"MOVW\tR\\d+,\\sR\\d+" // ppc64le:-"MOVW\tR\\d+,\\sR\\d+" if uint32(u64) == val32[0] { return true @@ -179,31 +215,37 @@ func cmp32(x8 int8, u8 uint8, x16 int16, u16 uint16, x64 int64, u64 uint64) bool func cmp64(x8 int8, u8 uint8, x16 int16, u16 uint16, x32 int32, u32 uint32) bool { + // ppc64:-"MOVB\tR\\d+,\\sR\\d+" // ppc64le:-"MOVB\tR\\d+,\\sR\\d+" if int64(x8) == sval64[0] { return true } + // ppc64:-"MOVBZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVBZ\tR\\d+,\\sR\\d+" if uint64(u8) == val64[0] { return true } + // ppc64:-"MOVH\tR\\d+,\\sR\\d+" // ppc64le:-"MOVH\tR\\d+,\\sR\\d+" if int64(x16) == sval64[0] { return true } + // ppc64:-"MOVHZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVHZ\tR\\d+,\\sR\\d+" if uint64(u16) == val64[0] { return true } + // ppc64:-"MOVW\tR\\d+,\\sR\\d+" // ppc64le:-"MOVW\tR\\d+,\\sR\\d+" if int64(x32) == sval64[0] { return true } + // ppc64:-"MOVWZ\tR\\d+,\\sR\\d+" // ppc64le:-"MOVWZ\tR\\d+,\\sR\\d+" if uint64(u32) == val64[0] { return true diff --git a/test/codegen/rotate.go b/test/codegen/rotate.go index 5812e1c0b1..ce24b57877 100644 --- a/test/codegen/rotate.go +++ b/test/codegen/rotate.go @@ -16,18 +16,21 @@ func rot64(x uint64) uint64 { // amd64:"ROLQ\t[$]7" // arm64:"ROR\t[$]57" // s390x:"RLLG\t[$]7" + // ppc64:"ROTL\t[$]7" // ppc64le:"ROTL\t[$]7" a += x<<7 | x>>57 // amd64:"ROLQ\t[$]8" // arm64:"ROR\t[$]56" // s390x:"RLLG\t[$]8" + // ppc64:"ROTL\t[$]8" // ppc64le:"ROTL\t[$]8" a += x<<8 + x>>56 // amd64:"ROLQ\t[$]9" // arm64:"ROR\t[$]55" // s390x:"RLLG\t[$]9" + // ppc64:"ROTL\t[$]9" // ppc64le:"ROTL\t[$]9" a += x<<9 ^ x>>55 @@ -41,6 +44,7 @@ func rot32(x uint32) uint32 { // arm:"MOVW\tR\\d+@>25" // arm64:"RORW\t[$]25" // s390x:"RLL\t[$]7" + // ppc64:"ROTLW\t[$]7" // ppc64le:"ROTLW\t[$]7" a += x<<7 | x>>25 @@ -48,6 +52,7 @@ func rot32(x uint32) uint32 { // arm:"MOVW\tR\\d+@>24" // arm64:"RORW\t[$]24" // s390x:"RLL\t[$]8" + // ppc64:"ROTLW\t[$]8" // ppc64le:"ROTLW\t[$]8" a += x<<8 + x>>24 @@ -55,6 +60,7 @@ func rot32(x uint32) uint32 { // arm:"MOVW\tR\\d+@>23" // arm64:"RORW\t[$]23" // s390x:"RLL\t[$]9" + // ppc64:"ROTLW\t[$]9" // ppc64le:"ROTLW\t[$]9" a += x<<9 ^ x>>23 @@ -101,6 +107,7 @@ func rot64nc(x uint64, z uint) uint64 { z &= 63 // amd64:"ROLQ" + // ppc64:"ROTL" // ppc64le:"ROTL" a += x<>(64-z) @@ -116,6 +123,7 @@ func rot32nc(x uint32, z uint) uint32 { z &= 31 // amd64:"ROLL" + // ppc64:"ROTLW" // ppc64le:"ROTLW" a += x<>(32-z) diff --git a/test/codegen/stack.go b/test/codegen/stack.go index 0f2f6178c7..ed2c1ed959 100644 --- a/test/codegen/stack.go +++ b/test/codegen/stack.go @@ -18,6 +18,7 @@ import "runtime" // arm:"TEXT\t.*, [$]-4-" // arm64:"TEXT\t.*, [$]0-" // mips:"TEXT\t.*, [$]-4-" +// ppc64:"TEXT\t.*, [$]0-" // ppc64le:"TEXT\t.*, [$]0-" // s390x:"TEXT\t.*, [$]0-" func StackStore() int { @@ -37,6 +38,7 @@ type T struct { // arm:"TEXT\t.*, [$]0-" (spills return address) // arm64:"TEXT\t.*, [$]0-" // mips:"TEXT\t.*, [$]-4-" +// ppc64:"TEXT\t.*, [$]0-" // ppc64le:"TEXT\t.*, [$]0-" // s390x:"TEXT\t.*, [$]0-" func ZeroLargeStruct(x *T) { @@ -51,6 +53,7 @@ func ZeroLargeStruct(x *T) { // amd64:"TEXT\t.*, [$]0-" // arm:"TEXT\t.*, [$]0-" (spills return address) // arm64:"TEXT\t.*, [$]0-" +// ppc64:"TEXT\t.*, [$]0-" // ppc64le:"TEXT\t.*, [$]0-" // s390x:"TEXT\t.*, [$]0-" // Note: that 386 currently has to spill a register. @@ -65,6 +68,7 @@ func KeepWanted(t *T) { // - arm & mips fail due to softfloat calls // amd64:"TEXT\t.*, [$]0-" // arm64:"TEXT\t.*, [$]0-" +// ppc64:"TEXT\t.*, [$]0-" // ppc64le:"TEXT\t.*, [$]0-" // s390x:"TEXT\t.*, [$]0-" func ArrayAdd64(a, b [4]float64) [4]float64 { @@ -78,6 +82,7 @@ func ArrayAdd64(a, b [4]float64) [4]float64 { // arm:"TEXT\t.*, [$]0-" (spills return address) // arm64:"TEXT\t.*, [$]0-" // mips:"TEXT\t.*, [$]-4-" +// ppc64:"TEXT\t.*, [$]0-" // ppc64le:"TEXT\t.*, [$]0-" // s390x:"TEXT\t.*, [$]0-" func ArrayInit(i, j int) [4]int { From 62c52a5ee19279a2151bdf178eee11b95c188a91 Mon Sep 17 00:00:00 2001 From: Matthew Dempsky Date: Tue, 16 Oct 2018 11:58:00 -0700 Subject: [PATCH 149/240] cmd/compile/internal/gc: simplify typechecking definitions There are only a handful of nodes that we need to pass to typecheckdef (OLITERAL, ONAME, OTYPE, and ONONAME), but typecheck1 takes the awkward approach of calling typecheckdef on every node with Sym != nil, and then excluding a long list of uninteresting Ops that have a non-nil Sym. Passes toolstash-check. Change-Id: I0271d2faff0208ad57ddc1f1a540a5fbed870234 Reviewed-on: https://go-review.googlesource.com/c/142657 Run-TryBot: Matthew Dempsky TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/cmd/compile/internal/gc/typecheck.go | 31 +++++++++++------------- 1 file changed, 14 insertions(+), 17 deletions(-) diff --git a/src/cmd/compile/internal/gc/typecheck.go b/src/cmd/compile/internal/gc/typecheck.go index cfdd88d45e..d2354e47be 100644 --- a/src/cmd/compile/internal/gc/typecheck.go +++ b/src/cmd/compile/internal/gc/typecheck.go @@ -296,21 +296,21 @@ func indexlit(n *Node) *Node { // n.Left = typecheck1(n.Left, top) func typecheck1(n *Node, top int) *Node { switch n.Op { - case OXDOT, ODOT, ODOTPTR, ODOTMETH, ODOTINTER, ORETJMP: - // n.Sym is a field/method name, not a variable. - default: - if n.Sym != nil { - if n.Op == ONAME && n.SubOp() != 0 && top&Ecall == 0 { - yyerror("use of builtin %v not in function call", n.Sym) - n.Type = nil - return n - } + case OLITERAL, ONAME, ONONAME, OTYPE: + if n.Sym == nil { + break + } - typecheckdef(n) - if n.Op == ONONAME { - n.Type = nil - return n - } + if n.Op == ONAME && n.SubOp() != 0 && top&Ecall == 0 { + yyerror("use of builtin %v not in function call", n.Sym) + n.Type = nil + return n + } + + typecheckdef(n) + if n.Op == ONONAME { + n.Type = nil + return n } } @@ -3666,9 +3666,6 @@ func typecheckdef(n *Node) { default: Fatalf("typecheckdef %v", n.Op) - case OGOTO, OLABEL, OPACK: - // nothing to do here - case OLITERAL: if n.Name.Param.Ntype != nil { n.Name.Param.Ntype = typecheck(n.Name.Param.Ntype, Etype) From 965fa3b191270bbc23a040a520ce43406ba29343 Mon Sep 17 00:00:00 2001 From: Matthew Dempsky Date: Tue, 16 Oct 2018 12:49:17 -0700 Subject: [PATCH 150/240] cmd/compile: remove -dolinkobj flag This used to be used by cmd/vet and some assembly generation tests, but those were removed in CL 37691 and CL 107336. No point in keeping an unneeded flag around. Fixes #28220. Change-Id: I59f8546954ab36ea61ceba81c10d6e16d74b966a Reviewed-on: https://go-review.googlesource.com/c/142677 Run-TryBot: Matthew Dempsky Reviewed-by: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- src/cmd/compile/internal/gc/go.go | 1 - src/cmd/compile/internal/gc/main.go | 115 ++++++++++++++-------------- src/cmd/compile/internal/gc/obj.go | 4 - 3 files changed, 56 insertions(+), 64 deletions(-) diff --git a/src/cmd/compile/internal/gc/go.go b/src/cmd/compile/internal/gc/go.go index 605afd6407..57533237bc 100644 --- a/src/cmd/compile/internal/gc/go.go +++ b/src/cmd/compile/internal/gc/go.go @@ -92,7 +92,6 @@ var pragcgobuf [][]string var outfile string var linkobj string -var dolinkobj bool // nerrors is the number of compiler errors reported // since the last call to saveerrors. diff --git a/src/cmd/compile/internal/gc/main.go b/src/cmd/compile/internal/gc/main.go index 9a226318b9..5b159e3661 100644 --- a/src/cmd/compile/internal/gc/main.go +++ b/src/cmd/compile/internal/gc/main.go @@ -218,7 +218,6 @@ func Main(archInit func(*Arch)) { if sys.MSanSupported(objabi.GOOS, objabi.GOARCH) { flag.BoolVar(&flag_msan, "msan", false, "build code compatible with C/C++ memory sanitizer") } - flag.BoolVar(&dolinkobj, "dolinkobj", true, "generate linker-specific objects; if false, some invalid code may compile") flag.BoolVar(&nolocalimports, "nolocalimports", false, "reject local (relative) imports") flag.StringVar(&outfile, "o", "", "write output to `file`") flag.StringVar(&myimportpath, "p", "", "set expected package import `path`") @@ -606,71 +605,69 @@ func Main(archInit func(*Arch)) { timings.Start("fe", "escapes") escapes(xtop) - if dolinkobj { - // Collect information for go:nowritebarrierrec - // checking. This must happen before transformclosure. - // We'll do the final check after write barriers are - // inserted. - if compiling_runtime { - nowritebarrierrecCheck = newNowritebarrierrecChecker() + // Collect information for go:nowritebarrierrec + // checking. This must happen before transformclosure. + // We'll do the final check after write barriers are + // inserted. + if compiling_runtime { + nowritebarrierrecCheck = newNowritebarrierrecChecker() + } + + // Phase 7: Transform closure bodies to properly reference captured variables. + // This needs to happen before walk, because closures must be transformed + // before walk reaches a call of a closure. + timings.Start("fe", "xclosures") + for _, n := range xtop { + if n.Op == ODCLFUNC && n.Func.Closure != nil { + Curfn = n + transformclosure(n) } + } - // Phase 7: Transform closure bodies to properly reference captured variables. - // This needs to happen before walk, because closures must be transformed - // before walk reaches a call of a closure. - timings.Start("fe", "xclosures") - for _, n := range xtop { - if n.Op == ODCLFUNC && n.Func.Closure != nil { - Curfn = n - transformclosure(n) - } + // Prepare for SSA compilation. + // This must be before peekitabs, because peekitabs + // can trigger function compilation. + initssaconfig() + + // Just before compilation, compile itabs found on + // the right side of OCONVIFACE so that methods + // can be de-virtualized during compilation. + Curfn = nil + peekitabs() + + // Phase 8: Compile top level functions. + // Don't use range--walk can add functions to xtop. + timings.Start("be", "compilefuncs") + fcount = 0 + for i := 0; i < len(xtop); i++ { + n := xtop[i] + if n.Op == ODCLFUNC { + funccompile(n) + fcount++ } + } + timings.AddEvent(fcount, "funcs") - // Prepare for SSA compilation. - // This must be before peekitabs, because peekitabs - // can trigger function compilation. - initssaconfig() + if nsavederrors+nerrors == 0 { + fninit(xtop) + } - // Just before compilation, compile itabs found on - // the right side of OCONVIFACE so that methods - // can be de-virtualized during compilation. - Curfn = nil - peekitabs() + compileFunctions() - // Phase 8: Compile top level functions. - // Don't use range--walk can add functions to xtop. - timings.Start("be", "compilefuncs") - fcount = 0 - for i := 0; i < len(xtop); i++ { - n := xtop[i] - if n.Op == ODCLFUNC { - funccompile(n) - fcount++ - } - } - timings.AddEvent(fcount, "funcs") + if nowritebarrierrecCheck != nil { + // Write barriers are now known. Check the + // call graph. + nowritebarrierrecCheck.check() + nowritebarrierrecCheck = nil + } - if nsavederrors+nerrors == 0 { - fninit(xtop) - } - - compileFunctions() - - if nowritebarrierrecCheck != nil { - // Write barriers are now known. Check the - // call graph. - nowritebarrierrecCheck.check() - nowritebarrierrecCheck = nil - } - - // Finalize DWARF inline routine DIEs, then explicitly turn off - // DWARF inlining gen so as to avoid problems with generated - // method wrappers. - if Ctxt.DwFixups != nil { - Ctxt.DwFixups.Finalize(myimportpath, Debug_gendwarfinl != 0) - Ctxt.DwFixups = nil - genDwarfInline = 0 - } + // Finalize DWARF inline routine DIEs, then explicitly turn off + // DWARF inlining gen so as to avoid problems with generated + // method wrappers. + if Ctxt.DwFixups != nil { + Ctxt.DwFixups.Finalize(myimportpath, Debug_gendwarfinl != 0) + Ctxt.DwFixups = nil + genDwarfInline = 0 } // Phase 9: Check external declarations. diff --git a/src/cmd/compile/internal/gc/obj.go b/src/cmd/compile/internal/gc/obj.go index 19862c03aa..aed0f060cf 100644 --- a/src/cmd/compile/internal/gc/obj.go +++ b/src/cmd/compile/internal/gc/obj.go @@ -43,10 +43,6 @@ const ( ) func dumpobj() { - if !dolinkobj { - dumpobj1(outfile, modeCompilerObj) - return - } if linkobj == "" { dumpobj1(outfile, modeCompilerObj|modeLinkerObj) return From a52289ef2bf7e9b7a619caecc14d6c95eff9eeae Mon Sep 17 00:00:00 2001 From: Filippo Valsorda Date: Tue, 16 Oct 2018 13:01:07 -0400 Subject: [PATCH 151/240] Revert "fmt: fix incorrect format of whole-number floats when using %#v" Numbers without decimals are valid Go representations of whole-number floats. That is, "var x float64 = 5" is valid Go. Avoid breakage in tests that expect a certain output from %#v by reverting to it. To guarantee the right type is generated by a print use %T(%#v) instead. Added a test to lock in this behavior. This reverts commit 7c7cecc1846aaaa0ce73931644fe1df2b4559e09. Fixes #27634 Updates #26363 Change-Id: I544c400a0903777dd216452a7e86dfe60b0b0283 Reviewed-on: https://go-review.googlesource.com/c/142597 Run-TryBot: Filippo Valsorda TryBot-Result: Gobot Gobot Reviewed-by: Rob Pike Reviewed-by: Bryan C. Mills --- src/fmt/fmt_test.go | 7 +++---- src/fmt/format.go | 41 +++++++++++++++-------------------------- test/switch5.go | 8 ++++---- 3 files changed, 22 insertions(+), 34 deletions(-) diff --git a/src/fmt/fmt_test.go b/src/fmt/fmt_test.go index d63271a805..e97372225c 100644 --- a/src/fmt/fmt_test.go +++ b/src/fmt/fmt_test.go @@ -686,11 +686,10 @@ var fmtTests = []struct { {"%#v", 1.2345678, "1.2345678"}, {"%#v", float32(1.2345678), "1.2345678"}, - // Whole number floats should have a single trailing zero added, but not - // for exponent notation. - {"%#v", 1.0, "1.0"}, + // Whole number floats are printed without decimals. See Issue 27634. + {"%#v", 1.0, "1"}, {"%#v", 1000000.0, "1e+06"}, - {"%#v", float32(1.0), "1.0"}, + {"%#v", float32(1.0), "1"}, {"%#v", float32(1000000.0), "1e+06"}, // Only print []byte and []uint8 as type []byte if they appear at the top level. diff --git a/src/fmt/format.go b/src/fmt/format.go index 3a3cd8d1a1..91103f2c07 100644 --- a/src/fmt/format.go +++ b/src/fmt/format.go @@ -481,19 +481,15 @@ func (f *fmt) fmtFloat(v float64, size int, verb rune, prec int) { return } // The sharp flag forces printing a decimal point for non-binary formats - // and retains trailing zeros, which we may need to restore. For the sharpV - // flag, we ensure a single trailing zero is present if the output is not - // in exponent notation. - if f.sharpV || (f.sharp && verb != 'b') { + // and retains trailing zeros, which we may need to restore. + if f.sharp && verb != 'b' { digits := 0 - if !f.sharpV { - switch verb { - case 'g', 'G': - digits = prec - // If no precision is set explicitly use a precision of 6. - if digits == -1 { - digits = 6 - } + switch verb { + case 'v', 'g', 'G': + digits = prec + // If no precision is set explicitly use a precision of 6. + if digits == -1 { + digits = 6 } } @@ -502,32 +498,25 @@ func (f *fmt) fmtFloat(v float64, size int, verb rune, prec int) { var tailBuf [5]byte tail := tailBuf[:0] - var hasDecimalPoint, hasExponent bool + hasDecimalPoint := false // Starting from i = 1 to skip sign at num[0]. for i := 1; i < len(num); i++ { switch num[i] { case '.': hasDecimalPoint = true case 'e', 'E': - hasExponent = true tail = append(tail, num[i:]...) num = num[:i] default: digits-- } } - if f.sharpV { - if !hasDecimalPoint && !hasExponent { - num = append(num, '.', '0') - } - } else { - if !hasDecimalPoint { - num = append(num, '.') - } - for digits > 0 { - num = append(num, '0') - digits-- - } + if !hasDecimalPoint { + num = append(num, '.') + } + for digits > 0 { + num = append(num, '0') + digits-- } num = append(num, tail...) } diff --git a/test/switch5.go b/test/switch5.go index 6641d582bc..ce95bf8d7b 100644 --- a/test/switch5.go +++ b/test/switch5.go @@ -24,8 +24,8 @@ func f0(x int) { func f1(x float32) { switch x { case 5: - case 5: // ERROR "duplicate case 5 .value 5\.0. in switch" - case 5.0: // ERROR "duplicate case 5 .value 5\.0. in switch" + case 5: // ERROR "duplicate case 5 in switch" + case 5.0: // ERROR "duplicate case 5 in switch" } } @@ -44,9 +44,9 @@ func f3(e interface{}) { case 0: // ERROR "duplicate case 0 in switch" case int64(0): case float32(10): - case float32(10): // ERROR "duplicate case float32\(10\) .value 10\.0. in switch" + case float32(10): // ERROR "duplicate case float32\(10\) .value 10. in switch" case float64(10): - case float64(10): // ERROR "duplicate case float64\(10\) .value 10\.0. in switch" + case float64(10): // ERROR "duplicate case float64\(10\) .value 10. in switch" } } From fa913a36a2793524a65972c7c65f4a0578cb3392 Mon Sep 17 00:00:00 2001 From: Ilya Tocar Date: Mon, 17 Sep 2018 14:08:03 -0500 Subject: [PATCH 152/240] cmd/compile/internal/gc: inline autogenerated (*T).M wrappers MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently all inlining of autogenerated wrappers is disabled, because it causes build failures, when indexed export format is enabled. Turns out we can reenable it for common case of (*T).M wrappers. This fixes most performance degradation of 1.11 vs 1.10. encoding/binary: name old time/op new time/op delta ReadSlice1000Int32s-6 14.8µs ± 2% 11.5µs ± 2% -22.01% (p=0.000 n=10+10) WriteSlice1000Int32s-6 14.8µs ± 2% 11.7µs ± 2% -20.95% (p=0.000 n=10+10) bufio: name old time/op new time/op delta WriterFlush-6 32.4ns ± 1% 28.8ns ± 0% -11.17% (p=0.000 n=9+10) sort: SearchWrappers-6 231ns ± 1% 231ns ± 0% ~ (p=0.129 n=9+10) SortString1K-6 365µs ± 1% 298µs ± 1% -18.43% (p=0.000 n=9+10) SortString1K_Slice-6 274µs ± 2% 276µs ± 1% ~ (p=0.105 n=10+10) StableString1K-6 490µs ± 1% 373µs ± 1% -23.73% (p=0.000 n=10+10) SortInt1K-6 210µs ± 1% 142µs ± 1% -32.69% (p=0.000 n=10+10) StableInt1K-6 243µs ± 0% 151µs ± 1% -37.75% (p=0.000 n=10+10) StableInt1K_Slice-6 130µs ± 1% 130µs ± 0% ~ (p=0.237 n=10+8) SortInt64K-6 19.9ms ± 1% 13.5ms ± 1% -32.32% (p=0.000 n=10+10) SortInt64K_Slice-6 11.5ms ± 1% 11.5ms ± 1% ~ (p=0.912 n=10+10) StableInt64K-6 21.5ms ± 0% 13.5ms ± 1% -37.30% (p=0.000 n=9+10) Sort1e2-6 108µs ± 2% 83µs ± 3% -23.26% (p=0.000 n=10+10) Stable1e2-6 218µs ± 0% 161µs ± 1% -25.99% (p=0.000 n=8+9) Sort1e4-6 22.6ms ± 1% 16.8ms ± 0% -25.45% (p=0.000 n=10+7) Stable1e4-6 67.6ms ± 1% 49.7ms ± 0% -26.48% (p=0.000 n=10+10) Sort1e6-6 3.44s ± 0% 2.55s ± 1% -26.05% (p=0.000 n=8+9) Stable1e6-6 13.7s ± 0% 9.9s ± 1% -27.68% (p=0.000 n=8+10) Fixes #27621 Updates #25338 Change-Id: I6fe633202f63fa829a6ab849c44d7e45f8835dff Reviewed-on: https://go-review.googlesource.com/c/135697 Run-TryBot: Ilya Tocar TryBot-Result: Gobot Gobot Reviewed-by: Matthew Dempsky --- src/cmd/compile/internal/gc/inl_test.go | 27 +++++++++++++++++++++++-- src/cmd/compile/internal/gc/subr.go | 9 ++++----- 2 files changed, 29 insertions(+), 7 deletions(-) diff --git a/src/cmd/compile/internal/gc/inl_test.go b/src/cmd/compile/internal/gc/inl_test.go index 3fc0fbed1d..2f15cc3828 100644 --- a/src/cmd/compile/internal/gc/inl_test.go +++ b/src/cmd/compile/internal/gc/inl_test.go @@ -26,7 +26,8 @@ func TestIntendedInlining(t *testing.T) { t.Parallel() // want is the list of function names (by package) that should - // be inlined. + // be inlinable. If they have no callers in thier packages, they + // might not actually be inlined anywhere. want := map[string][]string{ "runtime": { // TODO(mvdan): enable these once mid-stack @@ -111,6 +112,11 @@ func TestIntendedInlining(t *testing.T) { "(*Buffer).UnreadByte", "(*Buffer).tryGrowByReslice", }, + "compress/flate": { + "byLiteral.Len", + "byLiteral.Less", + "byLiteral.Swap", + }, "unicode/utf8": { "FullRune", "FullRuneInString", @@ -162,6 +168,13 @@ func TestIntendedInlining(t *testing.T) { want["runtime"] = append(want["runtime"], "rotl_31") } + // Functions that must actually be inlined; they must have actual callers. + must := map[string]bool{ + "compress/flate.byLiteral.Len": true, + "compress/flate.byLiteral.Less": true, + "compress/flate.byLiteral.Swap": true, + } + notInlinedReason := make(map[string]string) pkgs := make([]string, 0, len(want)) for pname, fnames := range want { @@ -188,6 +201,7 @@ func TestIntendedInlining(t *testing.T) { scanner := bufio.NewScanner(pr) curPkg := "" canInline := regexp.MustCompile(`: can inline ([^ ]*)`) + haveInlined := regexp.MustCompile(`: inlining call to ([^ ]*)`) cannotInline := regexp.MustCompile(`: cannot inline ([^ ]*): (.*)`) for scanner.Scan() { line := scanner.Text() @@ -195,11 +209,20 @@ func TestIntendedInlining(t *testing.T) { curPkg = line[2:] continue } - if m := canInline.FindStringSubmatch(line); m != nil { + if m := haveInlined.FindStringSubmatch(line); m != nil { fname := m[1] delete(notInlinedReason, curPkg+"."+fname) continue } + if m := canInline.FindStringSubmatch(line); m != nil { + fname := m[1] + fullname := curPkg + "." + fname + // If function must be inlined somewhere, beeing inlinable is not enough + if _, ok := must[fullname]; !ok { + delete(notInlinedReason, fullname) + continue + } + } if m := cannotInline.FindStringSubmatch(line); m != nil { fname, reason := m[1], m[2] fullName := curPkg + "." + fname diff --git a/src/cmd/compile/internal/gc/subr.go b/src/cmd/compile/internal/gc/subr.go index 9a6c61a651..7c9c8a157d 100644 --- a/src/cmd/compile/internal/gc/subr.go +++ b/src/cmd/compile/internal/gc/subr.go @@ -1728,11 +1728,10 @@ func genwrapper(rcvr *types.Type, method *types.Field, newnam *types.Sym) { Curfn = fn typecheckslice(fn.Nbody.Slice(), Etop) - // TODO(mdempsky): Investigate why this doesn't work with - // indexed export. For now, we disable even in non-indexed - // mode to ensure fair benchmark comparisons and to track down - // unintended compilation differences. - if false { + // Inline calls within (*T).M wrappers. This is safe because we only + // generate those wrappers within the same compilation unit as (T).M. + // TODO(mdempsky): Investigate why we can't enable this more generally. + if rcvr.IsPtr() && rcvr.Elem() == method.Type.Recv().Type && rcvr.Elem().Sym != nil { inlcalls(fn) } escAnalyze([]*Node{fn}, false) From 0b63086f64ad7da114b003b98f1c78a6beb6ef26 Mon Sep 17 00:00:00 2001 From: Emmanuel T Odeke Date: Tue, 17 Jul 2018 19:02:53 -0700 Subject: [PATCH 153/240] cmd/compile: fix label redefinition error column numbers Ensure that label redefinition error column numbers print the actual start of the label instead of the position of the label's delimiting token ":". For example, given this program: package main func main() { foo: foo: foo: foo : } * Before: main.go:5:13: label foo defined and not used main.go:6:7: label foo already defined at main.go:5:13 main.go:7:4: label foo already defined at main.go:5:13 main.go:8:16: label foo already defined at main.go:5:13 * After: main.go:5:13: label foo defined and not used main.go:6:4: label foo already defined at main.go:5:13 main.go:7:1: label foo already defined at main.go:5:13 main.go:8:1: label foo already defined at main.go:5:13 Fixes #26411 Change-Id: I8eb874b97fdc8862547176d57ac2fa0f075f2367 Reviewed-on: https://go-review.googlesource.com/c/124595 Run-TryBot: Emmanuel Odeke TryBot-Result: Gobot Gobot Reviewed-by: Robert Griesemer --- src/cmd/compile/internal/syntax/branches.go | 2 +- test/fixedbugs/issue26411.go | 94 +++++++++++++++++++++ 2 files changed, 95 insertions(+), 1 deletion(-) create mode 100644 test/fixedbugs/issue26411.go diff --git a/src/cmd/compile/internal/syntax/branches.go b/src/cmd/compile/internal/syntax/branches.go index a03e2734d2..56e97c71d8 100644 --- a/src/cmd/compile/internal/syntax/branches.go +++ b/src/cmd/compile/internal/syntax/branches.go @@ -77,7 +77,7 @@ func (ls *labelScope) declare(b *block, s *LabeledStmt) *label { labels = make(map[string]*label) ls.labels = labels } else if alt := labels[name]; alt != nil { - ls.err(s.Pos(), "label %s already defined at %s", name, alt.lstmt.Label.Pos().String()) + ls.err(s.Label.Pos(), "label %s already defined at %s", name, alt.lstmt.Label.Pos().String()) return alt } l := &label{b, s, false} diff --git a/test/fixedbugs/issue26411.go b/test/fixedbugs/issue26411.go new file mode 100644 index 0000000000..789c176dae --- /dev/null +++ b/test/fixedbugs/issue26411.go @@ -0,0 +1,94 @@ +// +build !nacl,!js +// run + +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Ensure that label redefinition errors print out +// a column number that matches the start of the current label's +// definition instead of the label delimiting token ":" + +package main + +import ( + "bytes" + "fmt" + "io/ioutil" + "log" + "os" + "os/exec" + "path/filepath" + "regexp" +) + +func main() { + tmpdir, err := ioutil.TempDir("", "issue26411") + if err != nil { + log.Fatalf("Failed to create temporary directory: %v", err) + } + defer os.RemoveAll(tmpdir) + + samples := []struct { + code string + wantOutput []string + }{ + { + code: ` +package main + +func main() { +foo: +foo: +} +`, + wantOutput: []string{ + "^.+:5:1: label foo defined and not used\n", + ".+:6:1: label foo already defined at .+:5:1\n$", + }, + }, + { + code: ` +package main + +func main() { + + bar: + bar: +bar: +bar : +} +`, + + wantOutput: []string{ + "^.+:6:13: label bar defined and not used\n", + ".+:7:4: label bar already defined at .+:6:13\n", + ".+:8:1: label bar already defined at .+:6:13\n", + ".+:9:1: label bar already defined at .+:6:13\n$", + }, + }, + } + + for i, sample := range samples { + filename := filepath.Join(tmpdir, fmt.Sprintf("%d.go", i)) + if err := ioutil.WriteFile(filename, []byte(sample.code), 0644); err != nil { + log.Printf("#%d: failed to create file %s", i, filename) + continue + } + output, _ := exec.Command("go", "tool", "compile", filename).CombinedOutput() + + // Now match the output + for _, regex := range sample.wantOutput { + reg := regexp.MustCompile(regex) + matches := reg.FindAll(output, -1) + for _, match := range matches { + index := bytes.Index(output, match) + output = bytes.Join([][]byte{output[:index], output[index+len(match):]}, []byte("")) + } + } + + if len(output) != 0 { + log.Printf("#%d: did not match all the output\nResidual output:\n\t%s", i, output) + } + } +} From e861c3e003b37622603ff690aba5e62c0ddb31c2 Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Tue, 16 Oct 2018 15:53:38 -0700 Subject: [PATCH 154/240] cmd/compile: simplified test case (cleanup) Follow-up on https://golang.org/cl/124595; no semantic changes. Updates #26411. Change-Id: Ic1c4622dbf79529ff61530f9c25ec742c2abe5ca Reviewed-on: https://go-review.googlesource.com/c/142720 Run-TryBot: Robert Griesemer Reviewed-by: Emmanuel Odeke TryBot-Result: Gobot Gobot --- test/fixedbugs/issue26411.go | 30 ++++++++++++++---------------- 1 file changed, 14 insertions(+), 16 deletions(-) diff --git a/test/fixedbugs/issue26411.go b/test/fixedbugs/issue26411.go index 789c176dae..5f40bf2522 100644 --- a/test/fixedbugs/issue26411.go +++ b/test/fixedbugs/issue26411.go @@ -29,9 +29,9 @@ func main() { } defer os.RemoveAll(tmpdir) - samples := []struct { - code string - wantOutput []string + tests := []struct { + code string + errors []string }{ { code: ` @@ -42,7 +42,7 @@ foo: foo: } `, - wantOutput: []string{ + errors: []string{ "^.+:5:1: label foo defined and not used\n", ".+:6:1: label foo already defined at .+:5:1\n$", }, @@ -60,7 +60,7 @@ bar : } `, - wantOutput: []string{ + errors: []string{ "^.+:6:13: label bar defined and not used\n", ".+:7:4: label bar already defined at .+:6:13\n", ".+:8:1: label bar already defined at .+:6:13\n", @@ -69,26 +69,24 @@ bar : }, } - for i, sample := range samples { + for i, test := range tests { filename := filepath.Join(tmpdir, fmt.Sprintf("%d.go", i)) - if err := ioutil.WriteFile(filename, []byte(sample.code), 0644); err != nil { + if err := ioutil.WriteFile(filename, []byte(test.code), 0644); err != nil { log.Printf("#%d: failed to create file %s", i, filename) continue } output, _ := exec.Command("go", "tool", "compile", filename).CombinedOutput() - // Now match the output - for _, regex := range sample.wantOutput { - reg := regexp.MustCompile(regex) - matches := reg.FindAll(output, -1) - for _, match := range matches { - index := bytes.Index(output, match) - output = bytes.Join([][]byte{output[:index], output[index+len(match):]}, []byte("")) - } + // remove each matching error from the output + for _, err := range test.errors { + rx := regexp.MustCompile(err) + match := rx.Find(output) + output = bytes.Replace(output, match, nil, 1) // remove match (which might be nil) from output } + // at this point all output should have been consumed if len(output) != 0 { - log.Printf("#%d: did not match all the output\nResidual output:\n\t%s", i, output) + log.Printf("Test case %d has unmatched errors:\n%s", i, output) } } } From 9c039ea27a0deafcc713a1fced175ba73ae47b6a Mon Sep 17 00:00:00 2001 From: Rijnard van Tonder Date: Wed, 17 Oct 2018 01:10:14 +0000 Subject: [PATCH 155/240] crypto/aes: remove redundant nil check around loop Change-Id: I8cc4b5efe798e74b6daabd64fc2dd5486dcb7c5e GitHub-Last-Rev: 694509e33df7c5729ec0bf7b053ff18ebd87c36b GitHub-Pull-Request: golang/go#28115 Reviewed-on: https://go-review.googlesource.com/c/140998 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/crypto/aes/aes_test.go | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/src/crypto/aes/aes_test.go b/src/crypto/aes/aes_test.go index bedc2da946..1e8bac4bb5 100644 --- a/src/crypto/aes/aes_test.go +++ b/src/crypto/aes/aes_test.go @@ -231,12 +231,10 @@ L: continue L } } - if dec != nil { - for j, v := range dec { - if v != tt.dec[j] { - t.Errorf("key %d: dec[%d] = %#x, want %#x", i, j, v, tt.dec[j]) - continue L - } + for j, v := range dec { + if v != tt.dec[j] { + t.Errorf("key %d: dec[%d] = %#x, want %#x", i, j, v, tt.dec[j]) + continue L } } } From ee76992200a282f0ed4eb52e686ec254d8313cdc Mon Sep 17 00:00:00 2001 From: Filippo Valsorda Date: Fri, 12 Oct 2018 17:07:04 -0400 Subject: [PATCH 156/240] crypto/tls,crypto/x509: normalize RFC references Use the format "RFC XXXX, Section X.X" (or "Appendix Y.X") as it fits more properly in prose than a link, is more future-proof, and as there are multiple ways to render an RFC. Capital "S" to follow the quoting standard of RFCs themselves. Applied the new goimports grouping to all files in those packages, too. Change-Id: I01267bb3a3b02664f8f822e97b129075bb14d404 Reviewed-on: https://go-review.googlesource.com/c/141918 Reviewed-by: Dmitri Shuralyov --- src/crypto/tls/auth.go | 7 +++-- src/crypto/tls/cipher_suites.go | 8 +++--- src/crypto/tls/common.go | 27 ++++++++----------- src/crypto/tls/conn.go | 2 +- src/crypto/tls/handshake_client.go | 2 +- src/crypto/tls/handshake_messages.go | 33 +++++++++++------------ src/crypto/tls/handshake_messages_test.go | 3 +-- src/crypto/tls/handshake_server.go | 4 +-- src/crypto/tls/key_agreement.go | 5 ++-- src/crypto/tls/prf.go | 15 +++++------ src/crypto/x509/pem_decrypt.go | 2 +- src/crypto/x509/pkix/pkix.go | 2 +- src/crypto/x509/verify.go | 20 +++++++------- src/crypto/x509/x509.go | 32 ++++++++++------------ 14 files changed, 72 insertions(+), 90 deletions(-) diff --git a/src/crypto/tls/auth.go b/src/crypto/tls/auth.go index 88face4cde..a27db45b01 100644 --- a/src/crypto/tls/auth.go +++ b/src/crypto/tls/auth.go @@ -23,10 +23,9 @@ import ( func pickSignatureAlgorithm(pubkey crypto.PublicKey, peerSigAlgs, ourSigAlgs []SignatureScheme, tlsVersion uint16) (sigAlg SignatureScheme, sigType uint8, hashFunc crypto.Hash, err error) { if tlsVersion < VersionTLS12 || len(peerSigAlgs) == 0 { // For TLS 1.1 and before, the signature algorithm could not be - // negotiated and the hash is fixed based on the signature type. - // For TLS 1.2, if the client didn't send signature_algorithms - // extension then we can assume that it supports SHA1. See - // https://tools.ietf.org/html/rfc5246#section-7.4.1.4.1 + // negotiated and the hash is fixed based on the signature type. For TLS + // 1.2, if the client didn't send signature_algorithms extension then we + // can assume that it supports SHA1. See RFC 5246, Section 7.4.1.4.1. switch pubkey.(type) { case *rsa.PublicKey: if tlsVersion < VersionTLS12 { diff --git a/src/crypto/tls/cipher_suites.go b/src/crypto/tls/cipher_suites.go index 3c8dc4b2d2..d232996629 100644 --- a/src/crypto/tls/cipher_suites.go +++ b/src/crypto/tls/cipher_suites.go @@ -13,9 +13,8 @@ import ( "crypto/sha1" "crypto/sha256" "crypto/x509" - "hash" - "golang_org/x/crypto/chacha20poly1305" + "hash" ) // a keyAgreement implements the client and server side of a TLS key agreement @@ -303,7 +302,7 @@ func newConstantTimeHash(h func() hash.Hash) func() hash.Hash { } } -// tls10MAC implements the TLS 1.0 MAC function. RFC 2246, section 6.2.3. +// tls10MAC implements the TLS 1.0 MAC function. RFC 2246, Section 6.2.3. type tls10MAC struct { h hash.Hash } @@ -390,7 +389,6 @@ const ( TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305 uint16 = 0xcca9 // TLS_FALLBACK_SCSV isn't a standard cipher suite but an indicator - // that the client is doing version fallback. See - // https://tools.ietf.org/html/rfc7507. + // that the client is doing version fallback. See RFC 7507. TLS_FALLBACK_SCSV uint16 = 0x5600 ) diff --git a/src/crypto/tls/common.go b/src/crypto/tls/common.go index 7b627fc025..50db88eb60 100644 --- a/src/crypto/tls/common.go +++ b/src/crypto/tls/common.go @@ -79,7 +79,7 @@ const ( extensionSupportedPoints uint16 = 11 extensionSignatureAlgorithms uint16 = 13 extensionALPN uint16 = 16 - extensionSCT uint16 = 18 // https://tools.ietf.org/html/rfc6962#section-6 + extensionSCT uint16 = 18 // RFC 6962, Section 6 extensionSessionTicket uint16 = 35 extensionNextProtoNeg uint16 = 13172 // not IANA assigned extensionRenegotiationInfo uint16 = 0xff01 @@ -128,7 +128,7 @@ const ( ) // Signature algorithms (for internal signaling use). Starting at 16 to avoid overlap with -// TLS 1.2 codepoints (RFC 5246, section A.4.1), with which these have nothing to do. +// TLS 1.2 codepoints (RFC 5246, Appendix A.4.1), with which these have nothing to do. const ( signaturePKCS1v15 uint8 = iota + 16 signatureECDSA @@ -177,9 +177,9 @@ type ConnectionState struct { } // ExportKeyingMaterial returns length bytes of exported key material in a new -// slice as defined in https://tools.ietf.org/html/rfc5705. If context is nil, -// it is not used as part of the seed. If the connection was set to allow -// renegotiation via Config.Renegotiation, this function will return an error. +// slice as defined in RFC 5705. If context is nil, it is not used as part of +// the seed. If the connection was set to allow renegotiation via +// Config.Renegotiation, this function will return an error. func (cs *ConnectionState) ExportKeyingMaterial(label string, context []byte, length int) ([]byte, error) { return cs.ekm(label, context, length) } @@ -222,7 +222,7 @@ type ClientSessionCache interface { } // SignatureScheme identifies a signature algorithm supported by TLS. See -// https://tools.ietf.org/html/draft-ietf-tls-tls13-18#section-4.2.3. +// RFC 8446, Section 4.2.3. type SignatureScheme uint16 const ( @@ -252,32 +252,27 @@ type ClientHelloInfo struct { // ServerName indicates the name of the server requested by the client // in order to support virtual hosting. ServerName is only set if the - // client is using SNI (see - // https://tools.ietf.org/html/rfc4366#section-3.1). + // client is using SNI (see RFC 4366, Section 3.1). ServerName string // SupportedCurves lists the elliptic curves supported by the client. // SupportedCurves is set only if the Supported Elliptic Curves - // Extension is being used (see - // https://tools.ietf.org/html/rfc4492#section-5.1.1). + // Extension is being used (see RFC 4492, Section 5.1.1). SupportedCurves []CurveID // SupportedPoints lists the point formats supported by the client. // SupportedPoints is set only if the Supported Point Formats Extension - // is being used (see - // https://tools.ietf.org/html/rfc4492#section-5.1.2). + // is being used (see RFC 4492, Section 5.1.2). SupportedPoints []uint8 // SignatureSchemes lists the signature and hash schemes that the client // is willing to verify. SignatureSchemes is set only if the Signature - // Algorithms Extension is being used (see - // https://tools.ietf.org/html/rfc5246#section-7.4.1.4.1). + // Algorithms Extension is being used (see RFC 5246, Section 7.4.1.4.1). SignatureSchemes []SignatureScheme // SupportedProtos lists the application protocols supported by the client. // SupportedProtos is set only if the Application-Layer Protocol - // Negotiation Extension is being used (see - // https://tools.ietf.org/html/rfc7301#section-3.1). + // Negotiation Extension is being used (see RFC 7301, Section 3.1). // // Servers can select a protocol by setting Config.NextProtos in a // GetConfigForClient return value. diff --git a/src/crypto/tls/conn.go b/src/crypto/tls/conn.go index 6e27e695bd..f05135bc33 100644 --- a/src/crypto/tls/conn.go +++ b/src/crypto/tls/conn.go @@ -205,7 +205,7 @@ func (hc *halfConn) incSeq() { // extractPadding returns, in constant time, the length of the padding to remove // from the end of payload. It also returns a byte which is equal to 255 if the -// padding was valid and 0 otherwise. See RFC 2246, section 6.2.3.2 +// padding was valid and 0 otherwise. See RFC 2246, Section 6.2.3.2. func extractPadding(payload []byte) (toRemove int, good byte) { if len(payload) < 1 { return 0, 0 diff --git a/src/crypto/tls/handshake_client.go b/src/crypto/tls/handshake_client.go index 32fdc6d6eb..af290e33a7 100644 --- a/src/crypto/tls/handshake_client.go +++ b/src/crypto/tls/handshake_client.go @@ -845,7 +845,7 @@ func mutualProtocol(protos, preferenceProtos []string) (string, bool) { // hostnameInSNI converts name into an approriate hostname for SNI. // Literal IP addresses and absolute FQDNs are not permitted as SNI values. -// See https://tools.ietf.org/html/rfc6066#section-3. +// See RFC 6066, Section 3. func hostnameInSNI(name string) string { host := name if len(host) > 0 && host[0] == '[' && host[len(host)-1] == ']' { diff --git a/src/crypto/tls/handshake_messages.go b/src/crypto/tls/handshake_messages.go index a5bf10efb8..27004b2d69 100644 --- a/src/crypto/tls/handshake_messages.go +++ b/src/crypto/tls/handshake_messages.go @@ -155,7 +155,7 @@ func (m *clientHelloMsg) marshal() []byte { z[3] = byte(l) z = z[4:] - // RFC 3546, section 3.1 + // RFC 3546, Section 3.1 // // struct { // NameType name_type; @@ -182,7 +182,7 @@ func (m *clientHelloMsg) marshal() []byte { z = z[l:] } if m.ocspStapling { - // RFC 4366, section 3.6 + // RFC 4366, Section 3.6 z[0] = byte(extensionStatusRequest >> 8) z[1] = byte(extensionStatusRequest) z[2] = 0 @@ -192,7 +192,7 @@ func (m *clientHelloMsg) marshal() []byte { z = z[9:] } if len(m.supportedCurves) > 0 { - // https://tools.ietf.org/html/rfc4492#section-5.5.1 + // RFC 4492, Section 5.5.1 z[0] = byte(extensionSupportedCurves >> 8) z[1] = byte(extensionSupportedCurves) l := 2 + 2*len(m.supportedCurves) @@ -209,7 +209,7 @@ func (m *clientHelloMsg) marshal() []byte { } } if len(m.supportedPoints) > 0 { - // https://tools.ietf.org/html/rfc4492#section-5.5.2 + // RFC 4492, Section 5.5.2 z[0] = byte(extensionSupportedPoints >> 8) z[1] = byte(extensionSupportedPoints) l := 1 + len(m.supportedPoints) @@ -224,7 +224,7 @@ func (m *clientHelloMsg) marshal() []byte { } } if m.ticketSupported { - // https://tools.ietf.org/html/rfc5077#section-3.2 + // RFC 5077, Section 3.2 z[0] = byte(extensionSessionTicket >> 8) z[1] = byte(extensionSessionTicket) l := len(m.sessionTicket) @@ -235,7 +235,7 @@ func (m *clientHelloMsg) marshal() []byte { z = z[len(m.sessionTicket):] } if len(m.supportedSignatureAlgorithms) > 0 { - // https://tools.ietf.org/html/rfc5246#section-7.4.1.4.1 + // RFC 5246, Section 7.4.1.4.1 z[0] = byte(extensionSignatureAlgorithms >> 8) z[1] = byte(extensionSignatureAlgorithms) l := 2 + 2*len(m.supportedSignatureAlgorithms) @@ -285,7 +285,7 @@ func (m *clientHelloMsg) marshal() []byte { lengths[1] = byte(stringsLength) } if m.scts { - // https://tools.ietf.org/html/rfc6962#section-3.3.1 + // RFC 6962, Section 3.3.1 z[0] = byte(extensionSCT >> 8) z[1] = byte(extensionSCT) // zero uint16 for the zero-length extension_data @@ -396,9 +396,8 @@ func (m *clientHelloMsg) unmarshal(data []byte) bool { } if nameType == 0 { m.serverName = string(d[:nameLen]) - // An SNI value may not include a - // trailing dot. See - // https://tools.ietf.org/html/rfc6066#section-3. + // An SNI value may not include a trailing dot. + // See RFC 6066, Section 3. if strings.HasSuffix(m.serverName, ".") { return false } @@ -414,7 +413,7 @@ func (m *clientHelloMsg) unmarshal(data []byte) bool { case extensionStatusRequest: m.ocspStapling = length > 0 && data[0] == statusTypeOCSP case extensionSupportedCurves: - // https://tools.ietf.org/html/rfc4492#section-5.5.1 + // RFC 4492, Section 5.5.1 if length < 2 { return false } @@ -430,7 +429,7 @@ func (m *clientHelloMsg) unmarshal(data []byte) bool { d = d[2:] } case extensionSupportedPoints: - // https://tools.ietf.org/html/rfc4492#section-5.5.2 + // RFC 4492, Section 5.5.2 if length < 1 { return false } @@ -441,11 +440,11 @@ func (m *clientHelloMsg) unmarshal(data []byte) bool { m.supportedPoints = make([]uint8, l) copy(m.supportedPoints, data[1:]) case extensionSessionTicket: - // https://tools.ietf.org/html/rfc5077#section-3.2 + // RFC 5077, Section 3.2 m.ticketSupported = true m.sessionTicket = data[:length] case extensionSignatureAlgorithms: - // https://tools.ietf.org/html/rfc5246#section-7.4.1.4.1 + // RFC 5246, Section 7.4.1.4.1 if length < 2 || length&1 != 0 { return false } @@ -1224,7 +1223,7 @@ func (m *certificateRequestMsg) marshal() (x []byte) { return m.raw } - // See https://tools.ietf.org/html/rfc4346#section-7.4.4 + // See RFC 4346, Section 7.4.4. length := 1 + len(m.certificateTypes) + 2 casLength := 0 for _, ca := range m.certificateAuthorities { @@ -1374,7 +1373,7 @@ func (m *certificateVerifyMsg) marshal() (x []byte) { return m.raw } - // See https://tools.ietf.org/html/rfc4346#section-7.4.8 + // See RFC 4346, Section 7.4.8. siglength := len(m.signature) length := 2 + siglength if m.hasSignatureAndHash { @@ -1452,7 +1451,7 @@ func (m *newSessionTicketMsg) marshal() (x []byte) { return m.raw } - // See https://tools.ietf.org/html/rfc5077#section-3.3 + // See RFC 5077, Section 3.3. ticketLen := len(m.ticket) length := 2 + 4 + ticketLen x = make([]byte, 4+length) diff --git a/src/crypto/tls/handshake_messages_test.go b/src/crypto/tls/handshake_messages_test.go index 4a4a466768..52c5d30e8f 100644 --- a/src/crypto/tls/handshake_messages_test.go +++ b/src/crypto/tls/handshake_messages_test.go @@ -271,8 +271,7 @@ func (*sessionState) Generate(rand *rand.Rand, size int) reflect.Value { } func TestRejectEmptySCTList(t *testing.T) { - // https://tools.ietf.org/html/rfc6962#section-3.3.1 specifies that - // empty SCT lists are invalid. + // RFC 6962, Section 3.3.1 specifies that empty SCT lists are invalid. var random [32]byte sct := []byte{0x42, 0x42, 0x42, 0x42} diff --git a/src/crypto/tls/handshake_server.go b/src/crypto/tls/handshake_server.go index ac491bad39..b077c90580 100644 --- a/src/crypto/tls/handshake_server.go +++ b/src/crypto/tls/handshake_server.go @@ -49,7 +49,7 @@ func (c *Conn) serverHandshake() error { return err } - // For an overview of TLS handshaking, see https://tools.ietf.org/html/rfc5246#section-7.3 + // For an overview of TLS handshaking, see RFC 5246, Section 7.3. c.buffering = true if isResume { // The client has included a session ticket and so we do an abbreviated handshake. @@ -268,7 +268,7 @@ Curves: return false, errors.New("tls: no cipher suite supported by both client and server") } - // See https://tools.ietf.org/html/rfc7507. + // See RFC 7507. for _, id := range hs.clientHello.cipherSuites { if id == TLS_FALLBACK_SCSV { // The client is doing a fallback connection. diff --git a/src/crypto/tls/key_agreement.go b/src/crypto/tls/key_agreement.go index 1e77facce0..1baa901ec7 100644 --- a/src/crypto/tls/key_agreement.go +++ b/src/crypto/tls/key_agreement.go @@ -12,10 +12,9 @@ import ( "crypto/sha1" "crypto/x509" "errors" + "golang_org/x/crypto/curve25519" "io" "math/big" - - "golang_org/x/crypto/curve25519" ) var errClientKeyExchange = errors.New("tls: invalid ClientKeyExchange message") @@ -200,7 +199,7 @@ NextCandidate: ecdhePublic = elliptic.Marshal(curve, x, y) } - // https://tools.ietf.org/html/rfc4492#section-5.4 + // See RFC 4492, Section 5.4. serverECDHParams := make([]byte, 1+2+1+len(ecdhePublic)) serverECDHParams[0] = 3 // named curve serverECDHParams[1] = byte(ka.curveid >> 8) diff --git a/src/crypto/tls/prf.go b/src/crypto/tls/prf.go index a8cf21da15..a31a50d14f 100644 --- a/src/crypto/tls/prf.go +++ b/src/crypto/tls/prf.go @@ -16,14 +16,14 @@ import ( "hash" ) -// Split a premaster secret in two as specified in RFC 4346, section 5. +// Split a premaster secret in two as specified in RFC 4346, Section 5. func splitPreMasterSecret(secret []byte) (s1, s2 []byte) { s1 = secret[0 : (len(secret)+1)/2] s2 = secret[len(secret)/2:] return } -// pHash implements the P_hash function, as defined in RFC 4346, section 5. +// pHash implements the P_hash function, as defined in RFC 4346, Section 5. func pHash(result, secret, seed []byte, hash func() hash.Hash) { h := hmac.New(hash, secret) h.Write(seed) @@ -44,7 +44,7 @@ func pHash(result, secret, seed []byte, hash func() hash.Hash) { } } -// prf10 implements the TLS 1.0 pseudo-random function, as defined in RFC 2246, section 5. +// prf10 implements the TLS 1.0 pseudo-random function, as defined in RFC 2246, Section 5. func prf10(result, secret, label, seed []byte) { hashSHA1 := sha1.New hashMD5 := md5.New @@ -63,7 +63,7 @@ func prf10(result, secret, label, seed []byte) { } } -// prf12 implements the TLS 1.2 pseudo-random function, as defined in RFC 5246, section 5. +// prf12 implements the TLS 1.2 pseudo-random function, as defined in RFC 5246, Section 5. func prf12(hashFunc func() hash.Hash) func(result, secret, label, seed []byte) { return func(result, secret, label, seed []byte) { labelAndSeed := make([]byte, len(label)+len(seed)) @@ -140,7 +140,7 @@ func prfForVersion(version uint16, suite *cipherSuite) func(result, secret, labe } // masterFromPreMasterSecret generates the master secret from the pre-master -// secret. See https://tools.ietf.org/html/rfc5246#section-8.1 +// secret. See RFC 5246, Section 8.1. func masterFromPreMasterSecret(version uint16, suite *cipherSuite, preMasterSecret, clientRandom, serverRandom []byte) []byte { seed := make([]byte, 0, len(clientRandom)+len(serverRandom)) seed = append(seed, clientRandom...) @@ -153,7 +153,7 @@ func masterFromPreMasterSecret(version uint16, suite *cipherSuite, preMasterSecr // keysFromMasterSecret generates the connection keys from the master // secret, given the lengths of the MAC key, cipher key and IV, as defined in -// RFC 2246, section 6.3. +// RFC 2246, Section 6.3. func keysFromMasterSecret(version uint16, suite *cipherSuite, masterSecret, clientRandom, serverRandom []byte, macLen, keyLen, ivLen int) (clientMAC, serverMAC, clientKey, serverKey, clientIV, serverIV []byte) { seed := make([]byte, 0, len(serverRandom)+len(clientRandom)) seed = append(seed, serverRandom...) @@ -353,8 +353,7 @@ func noExportedKeyingMaterial(label string, context []byte, length int) ([]byte, return nil, errors.New("crypto/tls: ExportKeyingMaterial is unavailable when renegotiation is enabled") } -// ekmFromMasterSecret generates exported keying material as defined in -// https://tools.ietf.org/html/rfc5705. +// ekmFromMasterSecret generates exported keying material as defined in RFC 5705. func ekmFromMasterSecret(version uint16, suite *cipherSuite, masterSecret, clientRandom, serverRandom []byte) func(string, []byte, int) ([]byte, error) { return func(label string, context []byte, length int) ([]byte, error) { switch label { diff --git a/src/crypto/x509/pem_decrypt.go b/src/crypto/x509/pem_decrypt.go index 0388d63e14..93d1e4a922 100644 --- a/src/crypto/x509/pem_decrypt.go +++ b/src/crypto/x509/pem_decrypt.go @@ -203,7 +203,7 @@ func EncryptPEMBlock(rand io.Reader, blockType string, data, password []byte, al // the data separately, but it doesn't seem worth the additional // code. copy(encrypted, data) - // See RFC 1423, section 1.1 + // See RFC 1423, Section 1.1. for i := 0; i < pad; i++ { encrypted = append(encrypted, byte(pad)) } diff --git a/src/crypto/x509/pkix/pkix.go b/src/crypto/x509/pkix/pkix.go index 3cc4d587e3..59c3b15c83 100644 --- a/src/crypto/x509/pkix/pkix.go +++ b/src/crypto/x509/pkix/pkix.go @@ -95,7 +95,7 @@ func (r RDNSequence) String() string { type RelativeDistinguishedNameSET []AttributeTypeAndValue // AttributeTypeAndValue mirrors the ASN.1 structure of the same name in -// https://tools.ietf.org/html/rfc5280#section-4.1.2.4 +// RFC 5280, Section 4.1.2.4. type AttributeTypeAndValue struct { Type asn1.ObjectIdentifier Value interface{} diff --git a/src/crypto/x509/verify.go b/src/crypto/x509/verify.go index 91be7c05f9..23ee2d2512 100644 --- a/src/crypto/x509/verify.go +++ b/src/crypto/x509/verify.go @@ -222,10 +222,9 @@ type rfc2821Mailbox struct { } // parseRFC2821Mailbox parses an email address into local and domain parts, -// based on the ABNF for a “Mailbox” from RFC 2821. According to -// https://tools.ietf.org/html/rfc5280#section-4.2.1.6 that's correct for an -// rfc822Name from a certificate: “The format of an rfc822Name is a "Mailbox" -// as defined in https://tools.ietf.org/html/rfc2821#section-4.1.2”. +// based on the ABNF for a “Mailbox” from RFC 2821. According to RFC 5280, +// Section 4.2.1.6 that's correct for an rfc822Name from a certificate: “The +// format of an rfc822Name is a "Mailbox" as defined in RFC 2821, Section 4.1.2”. func parseRFC2821Mailbox(in string) (mailbox rfc2821Mailbox, ok bool) { if len(in) == 0 { return mailbox, false @@ -242,9 +241,8 @@ func parseRFC2821Mailbox(in string) (mailbox rfc2821Mailbox, ok bool) { // quoted-pair = ("\" text) / obs-qp // text = %d1-9 / %d11 / %d12 / %d14-127 / obs-text // - // (Names beginning with “obs-” are the obsolete syntax from - // https://tools.ietf.org/html/rfc2822#section-4. Since it has - // been 16 years, we no longer accept that.) + // (Names beginning with “obs-” are the obsolete syntax from RFC 2822, + // Section 4. Since it has been 16 years, we no longer accept that.) in = in[1:] QuotedString: for { @@ -298,7 +296,7 @@ func parseRFC2821Mailbox(in string) (mailbox rfc2821Mailbox, ok bool) { // Atom ("." Atom)* NextChar: for len(in) > 0 { - // atext from https://tools.ietf.org/html/rfc2822#section-3.2.4 + // atext from RFC 2822, Section 3.2.4 c := in[0] switch { @@ -334,7 +332,7 @@ func parseRFC2821Mailbox(in string) (mailbox rfc2821Mailbox, ok bool) { return mailbox, false } - // https://tools.ietf.org/html/rfc3696#section-3 + // From RFC 3696, Section 3: // “period (".") may also appear, but may not be used to start // or end the local part, nor may two or more consecutive // periods appear.” @@ -415,7 +413,7 @@ func matchEmailConstraint(mailbox rfc2821Mailbox, constraint string) (bool, erro } func matchURIConstraint(uri *url.URL, constraint string) (bool, error) { - // https://tools.ietf.org/html/rfc5280#section-4.2.1.10 + // From RFC 5280, Section 4.2.1.10: // “a uniformResourceIdentifier that does not include an authority // component with a host name specified as a fully qualified domain // name (e.g., if the URI either does not include an authority @@ -987,7 +985,7 @@ func (c *Certificate) VerifyHostname(h string) error { } if ip := net.ParseIP(candidateIP); ip != nil { // We only match IP addresses against IP SANs. - // https://tools.ietf.org/html/rfc6125#appendix-B.2 + // See RFC 6125, Appendix B.2. for _, candidate := range c.IPAddresses { if ip.Equal(candidate) { return nil diff --git a/src/crypto/x509/x509.go b/src/crypto/x509/x509.go index 2e72471de2..7e8f675886 100644 --- a/src/crypto/x509/x509.go +++ b/src/crypto/x509/x509.go @@ -24,6 +24,8 @@ import ( "encoding/pem" "errors" "fmt" + "golang_org/x/crypto/cryptobyte" + cryptobyte_asn1 "golang_org/x/crypto/cryptobyte/asn1" "io" "math/big" "net" @@ -32,9 +34,6 @@ import ( "strings" "time" "unicode/utf8" - - "golang_org/x/crypto/cryptobyte" - cryptobyte_asn1 "golang_org/x/crypto/cryptobyte/asn1" ) // pkixPublicKey reflects a PKIX public key structure. See SubjectPublicKeyInfo @@ -78,7 +77,7 @@ func marshalPublicKey(pub interface{}) (publicKeyBytes []byte, publicKeyAlgorith } publicKeyAlgorithm.Algorithm = oidPublicKeyRSA // This is a NULL parameters value which is required by - // https://tools.ietf.org/html/rfc3279#section-2.3.1. + // RFC 3279, Section 2.3.1. publicKeyAlgorithm.Parameters = asn1.NullRawValue case *ecdsa.PublicKey: publicKeyBytes = elliptic.Marshal(pub.Curve, pub.X, pub.Y) @@ -334,7 +333,7 @@ var signatureAlgorithmDetails = []struct { } // pssParameters reflects the parameters in an AlgorithmIdentifier that -// specifies RSA PSS. See https://tools.ietf.org/html/rfc3447#appendix-A.2.3 +// specifies RSA PSS. See RFC 3447, Appendix A.2.3. type pssParameters struct { // The following three fields are not marked as // optional because the default values specify SHA-1, @@ -413,13 +412,11 @@ func getSignatureAlgorithmFromAI(ai pkix.AlgorithmIdentifier) SignatureAlgorithm return UnknownSignatureAlgorithm } - // PSS is greatly overburdened with options. This code forces - // them into three buckets by requiring that the MGF1 hash - // function always match the message hash function (as - // recommended in - // https://tools.ietf.org/html/rfc3447#section-8.1), that the - // salt length matches the hash length, and that the trailer - // field has the default value. + // PSS is greatly overburdened with options. This code forces them into + // three buckets by requiring that the MGF1 hash function always match the + // message hash function (as recommended in RFC 3447, Section 8.1), that the + // salt length matches the hash length, and that the trailer field has the + // default value. if (len(params.Hash.Parameters.FullBytes) != 0 && !bytes.Equal(params.Hash.Parameters.FullBytes, asn1.NullBytes)) || !params.MGF.Algorithm.Equal(oidMGF1) || !mgf1HashFunc.Algorithm.Equal(params.Hash.Algorithm) || @@ -987,8 +984,8 @@ func parsePublicKey(algo PublicKeyAlgorithm, keyData *publicKeyInfo) (interface{ asn1Data := keyData.PublicKey.RightAlign() switch algo { case RSA: - // RSA public keys must have a NULL in the parameters - // (https://tools.ietf.org/html/rfc3279#section-2.3.1). + // RSA public keys must have a NULL in the parameters. + // See RFC 3279, Section 2.3.1. if !bytes.Equal(keyData.Algorithm.Parameters.FullBytes, asn1.NullBytes) { return nil, errors.New("x509: RSA key missing NULL parameters") } @@ -1203,7 +1200,7 @@ func parseNameConstraintsExtension(out *Certificate, e pkix.Extension) (unhandle } if !havePermitted && !haveExcluded || len(permitted) == 0 && len(excluded) == 0 { - // https://tools.ietf.org/html/rfc5280#section-4.2.1.10: + // From RFC 5280, Section 4.2.1.10: // “either the permittedSubtrees field // or the excludedSubtrees MUST be // present” @@ -1798,7 +1795,7 @@ func buildExtensions(template *Certificate, subjectIsEmpty bool, authorityKeyId if (len(template.DNSNames) > 0 || len(template.EmailAddresses) > 0 || len(template.IPAddresses) > 0 || len(template.URIs) > 0) && !oidInExtensions(oidExtensionSubjectAltName, template.ExtraExtensions) { ret[n].Id = oidExtensionSubjectAltName - // https://tools.ietf.org/html/rfc5280#section-4.2.1.6 + // From RFC 5280, Section 4.2.1.6: // “If the subject field contains an empty sequence ... then // subjectAltName extension ... is marked as critical” ret[n].Critical = subjectIsEmpty @@ -2357,8 +2354,7 @@ func parseRawAttributes(rawAttributes []asn1.RawValue) []pkix.AttributeTypeAndVa // parseCSRExtensions parses the attributes from a CSR and extracts any // requested extensions. func parseCSRExtensions(rawAttributes []asn1.RawValue) ([]pkix.Extension, error) { - // pkcs10Attribute reflects the Attribute structure from section 4.1 of - // https://tools.ietf.org/html/rfc2986. + // pkcs10Attribute reflects the Attribute structure from RFC 2986, Section 4.1. type pkcs10Attribute struct { Id asn1.ObjectIdentifier Values []asn1.RawValue `asn1:"set"` From 101a677ebf87f6ed0ed877533c54c7270edadc20 Mon Sep 17 00:00:00 2001 From: Rob Pike Date: Sat, 13 Oct 2018 21:06:43 +1100 Subject: [PATCH 157/240] cmd/doc: add -all flag to print all documentation for package Unlike the one for the old godoc, you need the -u flag to see unexported symbols. This seems like the right behavior: it's consistent. For now at least, the argument must be a package, not a symbol. This is also different from old godoc. Required a little refactoring but also cleaned up a few things. Update #25595 Leaving the bug open for now until we tackle go doc -all symbol Change-Id: Ibc1975bfa592cb1e92513eb2e5e9e11e01a60095 Reviewed-on: https://go-review.googlesource.com/c/141977 Run-TryBot: Rob Pike TryBot-Result: Gobot Gobot Reviewed-by: Russ Cox --- src/cmd/doc/doc_test.go | 116 +++++++++++++- src/cmd/doc/main.go | 14 ++ src/cmd/doc/pkg.go | 285 ++++++++++++++++++++++----------- src/cmd/go/alldocs.go | 2 + src/cmd/go/internal/doc/doc.go | 2 + 5 files changed, 327 insertions(+), 92 deletions(-) diff --git a/src/cmd/doc/doc_test.go b/src/cmd/doc/doc_test.go index 64b1fb596b..80fdb5c72e 100644 --- a/src/cmd/doc/doc_test.go +++ b/src/cmd/doc/doc_test.go @@ -147,6 +147,69 @@ var tests = []test{ `type T1 T2`, // Type alias does not display as type declaration. }, }, + // Package dump -all + { + "full package", + []string{"-all", p}, + []string{ + `package pkg .*import`, + `Package comment`, + `CONSTANTS`, + `Comment before ConstOne`, + `ConstOne = 1`, + `ConstTwo = 2 // Comment on line with ConstTwo`, + `ConstFive`, + `ConstSix`, + `Const block where first entry is unexported`, + `ConstLeft2, constRight2 uint64`, + `constLeft3, ConstRight3`, + `ConstLeft4, ConstRight4`, + `Duplicate = iota`, + `const CaseMatch = 1`, + `const Casematch = 2`, + `const ExportedConstant = 1`, + `const MultiLineConst = `, + `MultiLineString1`, + `VARIABLES`, + `Comment before VarOne`, + `VarOne = 1`, + `Comment about block of variables`, + `VarFive = 5`, + `var ExportedVariable = 1`, + `var LongLine = newLongLine\(`, + `var MultiLineVar = map\[struct {`, + `FUNCTIONS`, + `func ExportedFunc\(a int\) bool`, + `Comment about exported function`, + `func MultiLineFunc\(x interface`, + `func ReturnUnexported\(\) unexportedType`, + `TYPES`, + `type ExportedInterface interface`, + `type ExportedStructOneField struct`, + `type ExportedType struct`, + `Comment about exported type`, + `const ConstGroup4 ExportedType = ExportedType`, + `ExportedTypedConstant ExportedType = iota`, + `Constants tied to ExportedType`, + `func ExportedTypeConstructor\(\) \*ExportedType`, + `Comment about constructor for exported type`, + `func ReturnExported\(\) ExportedType`, + `func \(ExportedType\) ExportedMethod\(a int\) bool`, + `Comment about exported method`, + `type T1 = T2`, + `type T2 int`, + }, + []string{ + `constThree`, + `_, _ uint64 = 2 \* iota, 1 << iota`, + `constLeft1, constRight1`, + `duplicate`, + `varFour`, + `func internalFunc`, + `unexportedField`, + `func \(unexportedType\)`, + }, + }, // Package dump -u { "full package with u", @@ -164,6 +227,58 @@ var tests = []test{ `MultiLine(String|Method|Field)`, // No data from multi line portions. }, }, + // Package dump -u -all + { + "full package", + []string{"-u", "-all", p}, + []string{ + `package pkg .*import`, + `Package comment`, + `CONSTANTS`, + `Comment before ConstOne`, + `ConstOne += 1`, + `ConstTwo += 2 // Comment on line with ConstTwo`, + `constThree = 3 // Comment on line with constThree`, + `ConstFive`, + `const internalConstant += 2`, + `Comment about internal constant`, + `VARIABLES`, + `Comment before VarOne`, + `VarOne += 1`, + `Comment about block of variables`, + `varFour += 4`, + `VarFive += 5`, + `varSix += 6`, + `var ExportedVariable = 1`, + `var LongLine = newLongLine\(`, + `var MultiLineVar = map\[struct {`, + `var internalVariable = 2`, + `Comment about internal variable`, + `FUNCTIONS`, + `func ExportedFunc\(a int\) bool`, + `Comment about exported function`, + `func MultiLineFunc\(x interface`, + `func internalFunc\(a int\) bool`, + `Comment about internal function`, + `func newLongLine\(ss .*string\)`, + `TYPES`, + `type ExportedType struct`, + `type T1 = T2`, + `type T2 int`, + `type unexportedType int`, + `Comment about unexported type`, + `ConstGroup1 unexportedType = iota`, + `ConstGroup2`, + `ConstGroup3`, + `ExportedTypedConstant_unexported unexportedType = iota`, + `Constants tied to unexportedType`, + `const unexportedTypedConstant unexportedType = 1`, + `func ReturnUnexported\(\) unexportedType`, + `func \(unexportedType\) ExportedMethod\(\) bool`, + `func \(unexportedType\) unexportedMethod\(\) bool`, + }, + nil, + }, // Single constant. { @@ -361,7 +476,6 @@ var tests = []test{ `io.Reader.*Comment on line with embedded Reader`, }, []string{ - `int.*embedded`, // No unexported embedded field. `Comment about exported method`, // No comment about exported method. `unexportedMethod`, // No unexported method. `unexportedTypedConstant`, // No unexported constant. diff --git a/src/cmd/doc/main.go b/src/cmd/doc/main.go index a3e09d3f87..614f19438c 100644 --- a/src/cmd/doc/main.go +++ b/src/cmd/doc/main.go @@ -31,6 +31,9 @@ // The -src flag causes doc to print the full source code for the symbol, such // as the body of a struct, function or method. // +// The -all flag causes doc to print all documentation for the package and +// all its visible symbols. The argument must identify a package. +// // For complete documentation, run "go help doc". package main @@ -52,6 +55,7 @@ import ( var ( unexported bool // -u flag matchCase bool // -c flag + showAll bool // -all flag showCmd bool // -cmd flag showSrc bool // -src flag ) @@ -88,6 +92,7 @@ func do(writer io.Writer, flagSet *flag.FlagSet, args []string) (err error) { matchCase = false flagSet.BoolVar(&unexported, "u", false, "show unexported symbols as well as exported") flagSet.BoolVar(&matchCase, "c", false, "symbol matching honors case (paths not affected)") + flagSet.BoolVar(&showAll, "all", false, "show all documentation for package") flagSet.BoolVar(&showCmd, "cmd", false, "show symbols with package docs even if package is a command") flagSet.BoolVar(&showSrc, "src", false, "show source code for symbol") flagSet.Parse(args) @@ -127,6 +132,15 @@ func do(writer io.Writer, flagSet *flag.FlagSet, args []string) (err error) { unexported = true } + // We have a package. + if showAll { + if symbol != "" { + return fmt.Errorf("-all valid only for package, not symbol: %s", symbol) + } + pkg.allDoc() + return + } + switch { case symbol == "": pkg.packageDoc() // The package exists, so we got some output. diff --git a/src/cmd/doc/pkg.go b/src/cmd/doc/pkg.go index 154fb7b45f..bb1b998537 100644 --- a/src/cmd/doc/pkg.go +++ b/src/cmd/doc/pkg.go @@ -29,15 +29,18 @@ const ( ) type Package struct { - writer io.Writer // Destination for output. - name string // Package name, json for encoding/json. - userPath string // String the user used to find this package. - pkg *ast.Package // Parsed package. - file *ast.File // Merged from all files in the package - doc *doc.Package - build *build.Package - fs *token.FileSet // Needed for printing. - buf bytes.Buffer + writer io.Writer // Destination for output. + name string // Package name, json for encoding/json. + userPath string // String the user used to find this package. + pkg *ast.Package // Parsed package. + file *ast.File // Merged from all files in the package + doc *doc.Package + build *build.Package + typedValue map[*doc.Value]bool // Consts and vars related to types. + constructor map[*doc.Func]bool // Constructors. + packageClausePrinted bool // Prevent repeated package clauses. + fs *token.FileSet // Needed for printing. + buf bytes.Buffer } type PackageError string // type returned by pkg.Fatalf. @@ -142,21 +145,38 @@ func parsePackage(writer io.Writer, pkg *build.Package, userPath string) *Packag mode |= doc.PreserveAST // See comment for Package.emit. } docPkg := doc.New(astPkg, pkg.ImportPath, mode) + typedValue := make(map[*doc.Value]bool) + constructor := make(map[*doc.Func]bool) for _, typ := range docPkg.Types { docPkg.Consts = append(docPkg.Consts, typ.Consts...) + for _, value := range typ.Consts { + typedValue[value] = true + } docPkg.Vars = append(docPkg.Vars, typ.Vars...) + for _, value := range typ.Vars { + typedValue[value] = true + } docPkg.Funcs = append(docPkg.Funcs, typ.Funcs...) + for _, fun := range typ.Funcs { + // We don't count it as a constructor bound to the type + // if the type itself is not exported. + if isExported(typ.Name) { + constructor[fun] = true + } + } } return &Package{ - writer: writer, - name: pkg.Name, - userPath: userPath, - pkg: astPkg, - file: ast.MergePackageFiles(astPkg, 0), - doc: docPkg, - build: pkg, - fs: fs, + writer: writer, + name: pkg.Name, + userPath: userPath, + pkg: astPkg, + file: ast.MergePackageFiles(astPkg, 0), + doc: docPkg, + typedValue: typedValue, + constructor: constructor, + build: pkg, + fs: fs, } } @@ -390,6 +410,68 @@ func joinStrings(ss []string) string { return strings.Join(ss, ", ") } +// allDoc prints all the docs for the package. +func (pkg *Package) allDoc() { + defer pkg.flush() + if pkg.showInternals() { + pkg.packageClause(false) + } + + doc.ToText(&pkg.buf, pkg.doc.Doc, "", indent, indentedWidth) + pkg.newlines(1) + + printed := make(map[*ast.GenDecl]bool) + + hdr := "" + printHdr := func(s string) { + if hdr != s { + pkg.Printf("\n%s\n\n", s) + } + } + + // Constants. + for _, value := range pkg.doc.Consts { + // Constants and variables come in groups, and valueDoc prints + // all the items in the group. We only need to find one exported symbol. + for _, name := range value.Names { + if isExported(name) && !pkg.typedValue[value] { + printHdr("CONSTANTS") + pkg.valueDoc(value, printed) + break + } + } + } + + // Variables. + for _, value := range pkg.doc.Vars { + // Constants and variables come in groups, and valueDoc prints + // all the items in the group. We only need to find one exported symbol. + for _, name := range value.Names { + if isExported(name) && !pkg.typedValue[value] { + printHdr("VARIABLES") + pkg.valueDoc(value, printed) + break + } + } + } + + // Functions. + for _, fun := range pkg.doc.Funcs { + if isExported(fun.Name) && !pkg.constructor[fun] { + printHdr("FUNCTIONS") + pkg.emit(fun.Doc, fun.Decl) + } + } + + // Types. + for _, typ := range pkg.doc.Types { + if isExported(typ.Name) { + printHdr("TYPES") + pkg.typeDoc(typ) + } + } +} + // packageDoc prints the docs for the package (package doc plus one-liners of the rest). func (pkg *Package) packageDoc() { defer pkg.flush() @@ -426,6 +508,10 @@ func (pkg *Package) showInternals() bool { // user's argument is identical to the actual package path or // is empty, meaning it's the current directory. func (pkg *Package) packageClause(checkUserPath bool) { + if pkg.packageClausePrinted { + return + } + if checkUserPath { if pkg.userPath == "" || pkg.userPath == pkg.build.ImportPath { return @@ -463,6 +549,7 @@ func (pkg *Package) packageClause(checkUserPath bool) { if !usingModules && importPath != pkg.build.ImportPath { pkg.Printf("WARNING: package source is installed in %q\n", pkg.build.ImportPath) } + pkg.packageClausePrinted = true } // valueSummary prints a one-line summary for each set of values and constants. @@ -497,22 +584,10 @@ func (pkg *Package) valueSummary(values []*doc.Value, showGrouped bool) { // funcSummary prints a one-line summary for each function. Constructors // are printed by typeSummary, below, and so can be suppressed here. func (pkg *Package) funcSummary(funcs []*doc.Func, showConstructors bool) { - // First, identify the constructors. Don't bother figuring out if they're exported. - var isConstructor map[*doc.Func]bool - if !showConstructors { - isConstructor = make(map[*doc.Func]bool) - for _, typ := range pkg.doc.Types { - if isExported(typ.Name) { - for _, f := range typ.Funcs { - isConstructor[f] = true - } - } - } - } for _, fun := range funcs { // Exported functions only. The go/doc package does not include methods here. if isExported(fun.Name) { - if !isConstructor[fun] { + if showConstructors || !pkg.constructor[fun] { pkg.Printf("%s\n", pkg.oneLineNode(fun.Decl)) } } @@ -629,71 +704,12 @@ func (pkg *Package) symbolDoc(symbol string) bool { // So we remember which declarations we've printed to avoid duplication. printed := make(map[*ast.GenDecl]bool) for _, value := range values { - // Print each spec only if there is at least one exported symbol in it. - // (See issue 11008.) - // TODO: Should we elide unexported symbols from a single spec? - // It's an unlikely scenario, probably not worth the trouble. - // TODO: Would be nice if go/doc did this for us. - specs := make([]ast.Spec, 0, len(value.Decl.Specs)) - var typ ast.Expr - for _, spec := range value.Decl.Specs { - vspec := spec.(*ast.ValueSpec) - - // The type name may carry over from a previous specification in the - // case of constants and iota. - if vspec.Type != nil { - typ = vspec.Type - } - - for _, ident := range vspec.Names { - if showSrc || isExported(ident.Name) { - if vspec.Type == nil && vspec.Values == nil && typ != nil { - // This a standalone identifier, as in the case of iota usage. - // Thus, assume the type comes from the previous type. - vspec.Type = &ast.Ident{ - Name: pkg.oneLineNode(typ), - NamePos: vspec.End() - 1, - } - } - - specs = append(specs, vspec) - typ = nil // Only inject type on first exported identifier - break - } - } - } - if len(specs) == 0 || printed[value.Decl] { - continue - } - value.Decl.Specs = specs - if !found { - pkg.packageClause(true) - } - pkg.emit(value.Doc, value.Decl) - printed[value.Decl] = true + pkg.valueDoc(value, printed) found = true } // Types. for _, typ := range pkg.findTypes(symbol) { - if !found { - pkg.packageClause(true) - } - decl := typ.Decl - spec := pkg.findTypeSpec(decl, typ.Name) - trimUnexportedElems(spec) - // If there are multiple types defined, reduce to just this one. - if len(decl.Specs) > 1 { - decl.Specs = []ast.Spec{spec} - } - pkg.emit(typ.Doc, decl) - // Show associated methods, constants, etc. - if len(typ.Consts) > 0 || len(typ.Vars) > 0 || len(typ.Funcs) > 0 || len(typ.Methods) > 0 { - pkg.Printf("\n") - } - pkg.valueSummary(typ.Consts, true) - pkg.valueSummary(typ.Vars, true) - pkg.funcSummary(typ.Funcs, true) - pkg.funcSummary(typ.Methods, true) + pkg.typeDoc(typ) found = true } if !found { @@ -705,6 +721,93 @@ func (pkg *Package) symbolDoc(symbol string) bool { return true } +// valueDoc prints the docs for a constant or variable. +func (pkg *Package) valueDoc(value *doc.Value, printed map[*ast.GenDecl]bool) { + if printed[value.Decl] { + return + } + // Print each spec only if there is at least one exported symbol in it. + // (See issue 11008.) + // TODO: Should we elide unexported symbols from a single spec? + // It's an unlikely scenario, probably not worth the trouble. + // TODO: Would be nice if go/doc did this for us. + specs := make([]ast.Spec, 0, len(value.Decl.Specs)) + var typ ast.Expr + for _, spec := range value.Decl.Specs { + vspec := spec.(*ast.ValueSpec) + + // The type name may carry over from a previous specification in the + // case of constants and iota. + if vspec.Type != nil { + typ = vspec.Type + } + + for _, ident := range vspec.Names { + if showSrc || isExported(ident.Name) { + if vspec.Type == nil && vspec.Values == nil && typ != nil { + // This a standalone identifier, as in the case of iota usage. + // Thus, assume the type comes from the previous type. + vspec.Type = &ast.Ident{ + Name: pkg.oneLineNode(typ), + NamePos: vspec.End() - 1, + } + } + + specs = append(specs, vspec) + typ = nil // Only inject type on first exported identifier + break + } + } + } + if len(specs) == 0 { + return + } + value.Decl.Specs = specs + pkg.emit(value.Doc, value.Decl) + printed[value.Decl] = true +} + +// typeDoc prints the docs for a type, including constructors and other items +// related to it. +func (pkg *Package) typeDoc(typ *doc.Type) { + decl := typ.Decl + spec := pkg.findTypeSpec(decl, typ.Name) + trimUnexportedElems(spec) + // If there are multiple types defined, reduce to just this one. + if len(decl.Specs) > 1 { + decl.Specs = []ast.Spec{spec} + } + pkg.emit(typ.Doc, decl) + pkg.newlines(2) + // Show associated methods, constants, etc. + if showAll { + printed := make(map[*ast.GenDecl]bool) + // We can use append here to print consts, then vars. Ditto for funcs and methods. + values := typ.Consts + values = append(values, typ.Vars...) + for _, value := range values { + for _, name := range value.Names { + if isExported(name) { + pkg.valueDoc(value, printed) + break + } + } + } + funcs := typ.Funcs + funcs = append(funcs, typ.Methods...) + for _, fun := range funcs { + if isExported(fun.Name) { + pkg.emit(fun.Doc, fun.Decl) + } + } + } else { + pkg.valueSummary(typ.Consts, true) + pkg.valueSummary(typ.Vars, true) + pkg.funcSummary(typ.Funcs, true) + pkg.funcSummary(typ.Methods, true) + } +} + // trimUnexportedElems modifies spec in place to elide unexported fields from // structs and methods from interfaces (unless the unexported flag is set or we // are asked to show the original source). diff --git a/src/cmd/go/alldocs.go b/src/cmd/go/alldocs.go index 33cb6cd3b3..7866b39793 100644 --- a/src/cmd/go/alldocs.go +++ b/src/cmd/go/alldocs.go @@ -342,6 +342,8 @@ // cd go/src/encoding/json; go doc decode // // Flags: +// -all +// Show all the documentation for the package. // -c // Respect case when matching symbols. // -cmd diff --git a/src/cmd/go/internal/doc/doc.go b/src/cmd/go/internal/doc/doc.go index 262bbb3ecb..bad05ff912 100644 --- a/src/cmd/go/internal/doc/doc.go +++ b/src/cmd/go/internal/doc/doc.go @@ -106,6 +106,8 @@ Examples: cd go/src/encoding/json; go doc decode Flags: + -all + Show all the documentation for the package. -c Respect case when matching symbols. -cmd From a2381f59662f8118c5cd78baaa90e8b186947e8f Mon Sep 17 00:00:00 2001 From: Rob Pike Date: Wed, 17 Oct 2018 22:32:27 +1100 Subject: [PATCH 158/240] cmd/doc: fix repeated header bug added in previous CL MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit One too many lines was deleted, and it would print a header multiple times. Add a test. Change-Id: I4906b454dbb66193d515ffacf43849ffdc2dede6 Reviewed-on: https://go-review.googlesource.com/c/142937 Reviewed-by: Ralph Corderoy Reviewed-by: Daniel Martí Run-TryBot: Daniel Martí TryBot-Result: Gobot Gobot --- src/cmd/doc/doc_test.go | 3 +++ src/cmd/doc/pkg.go | 1 + 2 files changed, 4 insertions(+) diff --git a/src/cmd/doc/doc_test.go b/src/cmd/doc/doc_test.go index 80fdb5c72e..ec3a50d87d 100644 --- a/src/cmd/doc/doc_test.go +++ b/src/cmd/doc/doc_test.go @@ -733,6 +733,9 @@ func TestDoc(t *testing.T) { failed = true } } + if bytes.Count(output, []byte("TYPES\n")) > 1 { + t.Fatalf("%s: repeating headers", test.name) + } if failed { t.Logf("\n%s", output) } diff --git a/src/cmd/doc/pkg.go b/src/cmd/doc/pkg.go index bb1b998537..680f555f59 100644 --- a/src/cmd/doc/pkg.go +++ b/src/cmd/doc/pkg.go @@ -426,6 +426,7 @@ func (pkg *Package) allDoc() { printHdr := func(s string) { if hdr != s { pkg.Printf("\n%s\n\n", s) + hdr = s } } From de31f637a9edec8a94c8fb6124bb30ff1d6ee1ee Mon Sep 17 00:00:00 2001 From: Yury Smolsky Date: Wed, 17 Oct 2018 10:40:44 +0300 Subject: [PATCH 159/240] cmd/compile: make tabs narrow in src column of ssa.html Too deeply nested code is hard to fit in ssa.html. This CL reduces the tab size to 4 characters. Change-Id: I08643b0868bce3439567084c7d701654655f23d7 Reviewed-on: https://go-review.googlesource.com/c/142857 Reviewed-by: David Chase --- src/cmd/compile/internal/ssa/html.go | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/cmd/compile/internal/ssa/html.go b/src/cmd/compile/internal/ssa/html.go index b7d5f912db..499fda5af5 100644 --- a/src/cmd/compile/internal/ssa/html.go +++ b/src/cmd/compile/internal/ssa/html.go @@ -109,6 +109,12 @@ code, pre, .lines, .ast { font-size: 12px; } +pre { + -moz-tab-size: 4; + -o-tab-size: 4; + tab-size: 4; +} + .allow-x-scroll { overflow-x: scroll; } From e508a5f072c6e3c8449007bf7ca87142c6746404 Mon Sep 17 00:00:00 2001 From: Michael Anthony Knyszek Date: Tue, 2 Oct 2018 20:23:41 +0000 Subject: [PATCH 160/240] runtime: de-duplicate span scavenging Currently, span scavenging was done nearly identically in two different locations. This change deduplicates that into one shared routine. For #14045. Change-Id: I15006b2c9af0e70b7a9eae9abb4168d3adca3860 Reviewed-on: https://go-review.googlesource.com/c/139297 Run-TryBot: Michael Knyszek TryBot-Result: Gobot Gobot Reviewed-by: Austin Clements --- src/runtime/mheap.go | 84 +++++++++++++++++--------------------------- 1 file changed, 32 insertions(+), 52 deletions(-) diff --git a/src/runtime/mheap.go b/src/runtime/mheap.go index 48b3f5364a..e35a8331fa 100644 --- a/src/runtime/mheap.go +++ b/src/runtime/mheap.go @@ -351,6 +351,34 @@ func (s *mspan) layout() (size, n, total uintptr) { return } +func (s *mspan) scavenge() uintptr { + start := s.base() + end := start + s.npages<<_PageShift + if physPageSize > _PageSize { + // We can only release pages in + // physPageSize blocks, so round start + // and end in. (Otherwise, madvise + // will round them *out* and release + // more memory than we want.) + start = (start + physPageSize - 1) &^ (physPageSize - 1) + end &^= physPageSize - 1 + if end <= start { + // start and end don't span a + // whole physical page. + return 0 + } + } + len := end - start + released := len - (s.npreleased << _PageShift) + if physPageSize > _PageSize && released == 0 { + return 0 + } + memstats.heap_released += uint64(released) + s.npreleased = len >> _PageShift + sysUnused(unsafe.Pointer(start), len) + return released +} + // recordspan adds a newly allocated span to h.allspans. // // This only happens the first time a span is allocated from @@ -1087,35 +1115,12 @@ func (h *mheap) busyList(npages uintptr) *mSpanList { func scavengeTreapNode(t *treapNode, now, limit uint64) uintptr { s := t.spanKey - var sumreleased uintptr if (now-uint64(s.unusedsince)) > limit && s.npreleased != s.npages { - start := s.base() - end := start + s.npages<<_PageShift - if physPageSize > _PageSize { - // We can only release pages in - // physPageSize blocks, so round start - // and end in. (Otherwise, madvise - // will round them *out* and release - // more memory than we want.) - start = (start + physPageSize - 1) &^ (physPageSize - 1) - end &^= physPageSize - 1 - if end <= start { - // start and end don't span a - // whole physical page. - return sumreleased - } + if released := s.scavenge(); released != 0 { + return released } - len := end - start - released := len - (s.npreleased << _PageShift) - if physPageSize > _PageSize && released == 0 { - return sumreleased - } - memstats.heap_released += uint64(released) - sumreleased += released - s.npreleased = len >> _PageShift - sysUnused(unsafe.Pointer(start), len) } - return sumreleased + return 0 } func scavengelist(list *mSpanList, now, limit uint64) uintptr { @@ -1128,32 +1133,7 @@ func scavengelist(list *mSpanList, now, limit uint64) uintptr { if (now-uint64(s.unusedsince)) <= limit || s.npreleased == s.npages { continue } - start := s.base() - end := start + s.npages<<_PageShift - if physPageSize > _PageSize { - // We can only release pages in - // physPageSize blocks, so round start - // and end in. (Otherwise, madvise - // will round them *out* and release - // more memory than we want.) - start = (start + physPageSize - 1) &^ (physPageSize - 1) - end &^= physPageSize - 1 - if end <= start { - // start and end don't span a - // whole physical page. - continue - } - } - len := end - start - - released := len - (s.npreleased << _PageShift) - if physPageSize > _PageSize && released == 0 { - continue - } - memstats.heap_released += uint64(released) - sumreleased += released - s.npreleased = len >> _PageShift - sysUnused(unsafe.Pointer(start), len) + sumreleased += s.scavenge() } return sumreleased } From 07e738ec32025da458cdf968e4f991972471e6e9 Mon Sep 17 00:00:00 2001 From: Michael Anthony Knyszek Date: Thu, 4 Oct 2018 21:03:26 +0000 Subject: [PATCH 161/240] runtime: use only treaps for tracking spans MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently, mheap tracks spans in both mSpanLists and mTreaps, but mSpanLists, while they tend to be smaller, complicate the implementation. Here we simplify the implementation by removing free and busy from mheap and renaming freelarge -> free and busylarge -> busy. This change also slightly changes the reclamation policy. Previously, for allocations under 1MB we would attempt to find a small span of the right size. Now, we just try to find any number of spans totaling the right size. This may increase heap fragmentation, but that will be dealt with using virtual memory tricks in follow-up CLs. For #14045. Garbage-heavy benchmarks show very little change, except what appears to be a decrease in STW times and peak RSS. name old STW-ns/GC new STW-ns/GC delta Garbage/benchmem-MB=64-8 263k ±64% 217k ±24% -17.66% (p=0.028 n=25+23) name old STW-ns/op new STW-ns/op delta Garbage/benchmem-MB=64-8 9.39k ±65% 7.80k ±24% -16.88% (p=0.037 n=25+23) name old peak-RSS-bytes new peak-RSS-bytes delta Garbage/benchmem-MB=64-8 281M ± 0% 249M ± 4% -11.40% (p=0.000 n=19+18) https://perf.golang.org/search?q=upload:20181005.1 Go1 benchmarks perform roughly the same, the most notable regression being the JSON encode/decode benchmark with worsens by ~2%. name old time/op new time/op delta BinaryTree17-8 3.02s ± 2% 2.99s ± 2% -1.18% (p=0.000 n=25+24) Fannkuch11-8 3.05s ± 1% 3.02s ± 2% -1.20% (p=0.000 n=25+25) FmtFprintfEmpty-8 43.6ns ± 5% 43.4ns ± 3% ~ (p=0.528 n=25+25) FmtFprintfString-8 74.9ns ± 3% 73.4ns ± 1% -2.03% (p=0.001 n=25+24) FmtFprintfInt-8 79.3ns ± 3% 77.9ns ± 1% -1.73% (p=0.003 n=25+25) FmtFprintfIntInt-8 119ns ± 6% 116ns ± 0% -2.68% (p=0.000 n=25+18) FmtFprintfPrefixedInt-8 134ns ± 4% 132ns ± 1% -1.52% (p=0.004 n=25+25) FmtFprintfFloat-8 240ns ± 1% 241ns ± 1% ~ (p=0.403 n=24+23) FmtManyArgs-8 543ns ± 1% 537ns ± 1% -1.00% (p=0.000 n=25+25) GobDecode-8 6.88ms ± 1% 6.92ms ± 4% ~ (p=0.088 n=24+22) GobEncode-8 5.92ms ± 1% 5.93ms ± 1% ~ (p=0.898 n=25+24) Gzip-8 267ms ± 2% 266ms ± 2% ~ (p=0.213 n=25+24) Gunzip-8 35.4ms ± 1% 35.6ms ± 1% +0.70% (p=0.000 n=25+25) HTTPClientServer-8 104µs ± 2% 104µs ± 2% ~ (p=0.686 n=25+25) JSONEncode-8 9.67ms ± 1% 9.80ms ± 4% +1.32% (p=0.000 n=25+25) JSONDecode-8 47.7ms ± 1% 48.8ms ± 5% +2.33% (p=0.000 n=25+25) Mandelbrot200-8 4.87ms ± 1% 4.91ms ± 1% +0.79% (p=0.000 n=25+25) GoParse-8 3.59ms ± 4% 3.55ms ± 1% ~ (p=0.199 n=25+24) RegexpMatchEasy0_32-8 90.3ns ± 1% 89.9ns ± 1% -0.47% (p=0.000 n=25+21) RegexpMatchEasy0_1K-8 204ns ± 1% 204ns ± 1% ~ (p=0.914 n=25+24) RegexpMatchEasy1_32-8 84.9ns ± 0% 84.6ns ± 1% -0.36% (p=0.000 n=24+25) RegexpMatchEasy1_1K-8 350ns ± 1% 348ns ± 3% -0.59% (p=0.007 n=25+25) RegexpMatchMedium_32-8 122ns ± 1% 121ns ± 0% -1.08% (p=0.000 n=25+18) RegexpMatchMedium_1K-8 36.1µs ± 1% 34.6µs ± 1% -4.02% (p=0.000 n=25+25) RegexpMatchHard_32-8 1.69µs ± 2% 1.65µs ± 1% -2.38% (p=0.000 n=25+25) RegexpMatchHard_1K-8 50.8µs ± 1% 49.4µs ± 1% -2.69% (p=0.000 n=25+24) Revcomp-8 453ms ± 2% 449ms ± 3% -0.74% (p=0.022 n=25+24) Template-8 63.2ms ± 2% 63.4ms ± 1% ~ (p=0.127 n=25+24) TimeParse-8 313ns ± 1% 315ns ± 3% ~ (p=0.924 n=24+25) TimeFormat-8 294ns ± 1% 292ns ± 2% -0.65% (p=0.004 n=23+24) [Geo mean] 49.9µs 49.6µs -0.65% name old speed new speed delta GobDecode-8 112MB/s ± 1% 110MB/s ± 4% -1.00% (p=0.036 n=24+24) GobEncode-8 130MB/s ± 1% 129MB/s ± 1% ~ (p=0.894 n=25+24) Gzip-8 72.7MB/s ± 2% 73.0MB/s ± 2% ~ (p=0.208 n=25+24) Gunzip-8 549MB/s ± 1% 545MB/s ± 1% -0.70% (p=0.000 n=25+25) JSONEncode-8 201MB/s ± 1% 198MB/s ± 3% -1.29% (p=0.000 n=25+25) JSONDecode-8 40.7MB/s ± 1% 39.8MB/s ± 5% -2.23% (p=0.000 n=25+25) GoParse-8 16.2MB/s ± 4% 16.3MB/s ± 1% ~ (p=0.211 n=25+24) RegexpMatchEasy0_32-8 354MB/s ± 1% 356MB/s ± 1% +0.47% (p=0.000 n=25+21) RegexpMatchEasy0_1K-8 5.00GB/s ± 0% 4.99GB/s ± 1% ~ (p=0.588 n=24+24) RegexpMatchEasy1_32-8 377MB/s ± 1% 378MB/s ± 1% +0.39% (p=0.000 n=25+25) RegexpMatchEasy1_1K-8 2.92GB/s ± 1% 2.94GB/s ± 3% +0.65% (p=0.008 n=25+25) RegexpMatchMedium_32-8 8.14MB/s ± 1% 8.22MB/s ± 1% +0.98% (p=0.000 n=25+24) RegexpMatchMedium_1K-8 28.4MB/s ± 1% 29.6MB/s ± 1% +4.19% (p=0.000 n=25+25) RegexpMatchHard_32-8 18.9MB/s ± 2% 19.4MB/s ± 1% +2.43% (p=0.000 n=25+25) RegexpMatchHard_1K-8 20.2MB/s ± 1% 20.7MB/s ± 1% +2.76% (p=0.000 n=25+24) Revcomp-8 561MB/s ± 2% 566MB/s ± 3% +0.75% (p=0.021 n=25+24) Template-8 30.7MB/s ± 2% 30.6MB/s ± 1% ~ (p=0.131 n=25+24) [Geo mean] 120MB/s 121MB/s +0.48% https://perf.golang.org/search?q=upload:20181004.6 Change-Id: I97f9fee34577961a116a8ddd445c6272253f0f95 Reviewed-on: https://go-review.googlesource.com/c/139837 Run-TryBot: Michael Knyszek TryBot-Result: Gobot Gobot Reviewed-by: Austin Clements --- src/runtime/malloc.go | 3 +- src/runtime/mheap.go | 136 ++++++------------------------------------ 2 files changed, 20 insertions(+), 119 deletions(-) diff --git a/src/runtime/malloc.go b/src/runtime/malloc.go index 791bbe7850..dad4773cb8 100644 --- a/src/runtime/malloc.go +++ b/src/runtime/malloc.go @@ -136,8 +136,7 @@ const ( _TinySize = 16 _TinySizeClass = int8(2) - _FixAllocChunk = 16 << 10 // Chunk size for FixAlloc - _MaxMHeapList = 1 << (20 - _PageShift) // Maximum page length for fixed-size list in MHeap. + _FixAllocChunk = 16 << 10 // Chunk size for FixAlloc // Per-P, per order stack segment cache size. _StackCacheSize = 32 * 1024 diff --git a/src/runtime/mheap.go b/src/runtime/mheap.go index e35a8331fa..33a190a4c5 100644 --- a/src/runtime/mheap.go +++ b/src/runtime/mheap.go @@ -30,13 +30,11 @@ const minPhysPageSize = 4096 //go:notinheap type mheap struct { lock mutex - free [_MaxMHeapList]mSpanList // free lists of given length up to _MaxMHeapList - freelarge mTreap // free treap of length >= _MaxMHeapList - busy [_MaxMHeapList]mSpanList // busy lists of large spans of given length - busylarge mSpanList // busy lists of large spans length >= _MaxMHeapList - sweepgen uint32 // sweep generation, see comment in mspan - sweepdone uint32 // all spans are swept - sweepers uint32 // number of active sweepone calls + free mTreap // free treap of spans + busy mSpanList // busy list of spans + sweepgen uint32 // sweep generation, see comment in mspan + sweepdone uint32 // all spans are swept + sweepers uint32 // number of active sweepone calls // allspans is a slice of all mspans ever created. Each mspan // appears exactly once. @@ -599,12 +597,7 @@ func (h *mheap) init() { h.spanalloc.zero = false // h->mapcache needs no init - for i := range h.free { - h.free[i].init() - h.busy[i].init() - } - - h.busylarge.init() + h.busy.init() for i := range h.central { h.central[i].mcentral.init(spanClass(i)) } @@ -647,30 +640,12 @@ retry: // Sweeps and reclaims at least npage pages into heap. // Called before allocating npage pages. func (h *mheap) reclaim(npage uintptr) { - // First try to sweep busy spans with large objects of size >= npage, - // this has good chances of reclaiming the necessary space. - for i := int(npage); i < len(h.busy); i++ { - if h.reclaimList(&h.busy[i], npage) != 0 { - return // Bingo! - } - } - - // Then -- even larger objects. - if h.reclaimList(&h.busylarge, npage) != 0 { + if h.reclaimList(&h.busy, npage) != 0 { return // Bingo! } - // Now try smaller objects. - // One such object is not enough, so we need to reclaim several of them. - reclaimed := uintptr(0) - for i := 0; i < int(npage) && i < len(h.busy); i++ { - reclaimed += h.reclaimList(&h.busy[i], npage-reclaimed) - if reclaimed >= npage { - return - } - } - // Now sweep everything that is not yet swept. + var reclaimed uintptr unlock(&h.lock) for { n := sweepone() @@ -752,11 +727,7 @@ func (h *mheap) alloc_m(npage uintptr, spanclass spanClass, large bool) *mspan { mheap_.nlargealloc++ atomic.Xadd64(&memstats.heap_live, int64(npage<<_PageShift)) // Swept spans are at the end of lists. - if s.npages < uintptr(len(h.busy)) { - h.busy[s.npages].insertBack(s) - } else { - h.busylarge.insertBack(s) - } + h.busy.insertBack(s) } } // heap_scan and heap_live were updated. @@ -867,31 +838,20 @@ func (h *mheap) setSpans(base, npage uintptr, s *mspan) { // The returned span has been removed from the // free list, but its state is still mSpanFree. func (h *mheap) allocSpanLocked(npage uintptr, stat *uint64) *mspan { - var list *mSpanList var s *mspan - // Try in fixed-size lists up to max. - for i := int(npage); i < len(h.free); i++ { - list = &h.free[i] - if !list.isEmpty() { - s = list.first - list.remove(s) - goto HaveSpan - } - } - // Best fit in list of large spans. - s = h.allocLarge(npage) // allocLarge removed s from h.freelarge for us + // Best fit in the treap of spans. + s = h.free.remove(npage) if s == nil { if !h.grow(npage) { return nil } - s = h.allocLarge(npage) + s = h.free.remove(npage) if s == nil { return nil } } -HaveSpan: // Mark span in use. if s.state != mSpanFree { throw("MHeap_AllocLocked - MSpan not free") @@ -933,21 +893,6 @@ HaveSpan: return s } -// Large spans have a minimum size of 1MByte. The maximum number of large spans to support -// 1TBytes is 1 million, experimentation using random sizes indicates that the depth of -// the tree is less that 2x that of a perfectly balanced tree. For 1TByte can be referenced -// by a perfectly balanced tree with a depth of 20. Twice that is an acceptable 40. -func (h *mheap) isLargeSpan(npages uintptr) bool { - return npages >= uintptr(len(h.free)) -} - -// allocLarge allocates a span of at least npage pages from the treap of large spans. -// Returns nil if no such span currently exists. -func (h *mheap) allocLarge(npage uintptr) *mspan { - // Search treap for smallest span with >= npage pages. - return h.freelarge.remove(npage) -} - // Try to add at least npage pages of memory to the heap, // returning whether it worked. // @@ -1023,7 +968,7 @@ func (h *mheap) freeManual(s *mspan, stat *uint64) { unlock(&h.lock) } -// s must be on a busy list (h.busy or h.busylarge) or unlinked. +// s must be on the busy list or unlinked. func (h *mheap) freeSpanLocked(s *mspan, acctinuse, acctidle bool, unusedsince int64) { switch s.state { case mSpanManual: @@ -1048,7 +993,7 @@ func (h *mheap) freeSpanLocked(s *mspan, acctinuse, acctidle bool, unusedsince i } s.state = mSpanFree if s.inList() { - h.busyList(s.npages).remove(s) + h.busy.remove(s) } // Stamp newly unused spans. The scavenger will use that @@ -1069,12 +1014,7 @@ func (h *mheap) freeSpanLocked(s *mspan, acctinuse, acctidle bool, unusedsince i h.setSpan(before.base(), s) // The size is potentially changing so the treap needs to delete adjacent nodes and // insert back as a combined node. - if h.isLargeSpan(before.npages) { - // We have a t, it is large so it has to be in the treap so we can remove it. - h.freelarge.removeSpan(before) - } else { - h.freeList(before.npages).remove(before) - } + h.free.removeSpan(before) before.state = mSpanDead h.spanalloc.free(unsafe.Pointer(before)) } @@ -1085,32 +1025,13 @@ func (h *mheap) freeSpanLocked(s *mspan, acctinuse, acctidle bool, unusedsince i s.npreleased += after.npreleased s.needzero |= after.needzero h.setSpan(s.base()+s.npages*pageSize-1, s) - if h.isLargeSpan(after.npages) { - h.freelarge.removeSpan(after) - } else { - h.freeList(after.npages).remove(after) - } + h.free.removeSpan(after) after.state = mSpanDead h.spanalloc.free(unsafe.Pointer(after)) } - // Insert s into appropriate list or treap. - if h.isLargeSpan(s.npages) { - h.freelarge.insert(s) - } else { - h.freeList(s.npages).insert(s) - } -} - -func (h *mheap) freeList(npages uintptr) *mSpanList { - return &h.free[npages] -} - -func (h *mheap) busyList(npages uintptr) *mSpanList { - if npages < uintptr(len(h.busy)) { - return &h.busy[npages] - } - return &h.busylarge + // Insert s into the free treap. + h.free.insert(s) } func scavengeTreapNode(t *treapNode, now, limit uint64) uintptr { @@ -1123,21 +1044,6 @@ func scavengeTreapNode(t *treapNode, now, limit uint64) uintptr { return 0 } -func scavengelist(list *mSpanList, now, limit uint64) uintptr { - if list.isEmpty() { - return 0 - } - - var sumreleased uintptr - for s := list.first; s != nil; s = s.next { - if (now-uint64(s.unusedsince)) <= limit || s.npreleased == s.npages { - continue - } - sumreleased += s.scavenge() - } - return sumreleased -} - func (h *mheap) scavenge(k int32, now, limit uint64) { // Disallow malloc or panic while holding the heap lock. We do // this here because this is an non-mallocgc entry-point to @@ -1145,11 +1051,7 @@ func (h *mheap) scavenge(k int32, now, limit uint64) { gp := getg() gp.m.mallocing++ lock(&h.lock) - var sumreleased uintptr - for i := 0; i < len(h.free); i++ { - sumreleased += scavengelist(&h.free[i], now, limit) - } - sumreleased += scavengetreap(h.freelarge.treap, now, limit) + sumreleased := scavengetreap(h.free.treap, now, limit) unlock(&h.lock) gp.m.mallocing-- From f2a676536f9aa4c230c90e48404e89f30477f243 Mon Sep 17 00:00:00 2001 From: Josh Bleecher Snyder Date: Tue, 16 Oct 2018 21:37:44 -0700 Subject: [PATCH 162/240] test: limit runoutput concurrency with -v This appears to have simply been an oversight. Change-Id: Ia5d1309b3ebc99c9abbf0282397693272d8178aa Reviewed-on: https://go-review.googlesource.com/c/142885 Run-TryBot: Josh Bleecher Snyder Reviewed-by: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- test/run.go | 1 + 1 file changed, 1 insertion(+) diff --git a/test/run.go b/test/run.go index 0974e9fdb8..b6421d5e41 100644 --- a/test/run.go +++ b/test/run.go @@ -78,6 +78,7 @@ func main() { // Disable parallelism if printing or if using a simulator. if *verbose || len(findExecCmd()) > 0 { *numParallel = 1 + *runoutputLimit = 1 } ratec = make(chan bool, *numParallel) From 5185744962d402df083d118036f9bef8c2e2d3b6 Mon Sep 17 00:00:00 2001 From: Matthew Dempsky Date: Tue, 16 Oct 2018 14:02:13 -0700 Subject: [PATCH 163/240] cmd/compile: remove obsolete "safe" mode Nowadays there are better ways to safely run untrusted Go programs, like NaCl and gVisor. Change-Id: I20c45f13a50dbcf35c343438b720eb93e7b4e13a Reviewed-on: https://go-review.googlesource.com/c/142717 Run-TryBot: Matthew Dempsky TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick Reviewed-by: Russ Cox --- src/cmd/compile/doc.go | 2 -- src/cmd/compile/internal/gc/alg.go | 20 ----------------- src/cmd/compile/internal/gc/go.go | 2 -- src/cmd/compile/internal/gc/inl.go | 28 +++--------------------- src/cmd/compile/internal/gc/main.go | 16 +------------- src/cmd/compile/internal/gc/obj.go | 7 +----- src/cmd/compile/internal/gc/subr.go | 7 ------ src/cmd/compile/internal/gc/typecheck.go | 4 ---- src/cmd/compile/internal/gc/walk.go | 11 ---------- test/unsafereject1.go | 16 -------------- test/unsafereject2.go | 15 ------------- 11 files changed, 5 insertions(+), 123 deletions(-) delete mode 100644 test/unsafereject1.go delete mode 100644 test/unsafereject2.go diff --git a/src/cmd/compile/doc.go b/src/cmd/compile/doc.go index 3dc73a8fde..bce03fc40f 100644 --- a/src/cmd/compile/doc.go +++ b/src/cmd/compile/doc.go @@ -92,8 +92,6 @@ Flags: Compile with race detector enabled. -trimpath prefix Remove prefix from recorded source file paths. - -u - Disallow importing packages not marked as safe; implies -nolocalimports. There are also a number of debugging flags; run the command with no arguments for a usage message. diff --git a/src/cmd/compile/internal/gc/alg.go b/src/cmd/compile/internal/gc/alg.go index 9a13ed368b..b112ff6797 100644 --- a/src/cmd/compile/internal/gc/alg.go +++ b/src/cmd/compile/internal/gc/alg.go @@ -300,18 +300,8 @@ func genhash(sym *types.Sym, t *types.Type) { testdclstack() } - // Disable safemode while compiling this code: the code we - // generate internally can refer to unsafe.Pointer. - // In this case it can happen if we need to generate an == - // for a struct containing a reflect.Value, which itself has - // an unexported field of type unsafe.Pointer. - old_safemode := safemode - safemode = false - fn.Func.SetNilCheckDisabled(true) funccompile(fn) - - safemode = old_safemode } func hashfor(t *types.Type) *Node { @@ -484,22 +474,12 @@ func geneq(sym *types.Sym, t *types.Type) { testdclstack() } - // Disable safemode while compiling this code: the code we - // generate internally can refer to unsafe.Pointer. - // In this case it can happen if we need to generate an == - // for a struct containing a reflect.Value, which itself has - // an unexported field of type unsafe.Pointer. - old_safemode := safemode - safemode = false - // Disable checknils while compiling this code. // We are comparing a struct or an array, // neither of which can be nil, and our comparisons // are shallow. fn.Func.SetNilCheckDisabled(true) funccompile(fn) - - safemode = old_safemode } // eqfield returns the node diff --git a/src/cmd/compile/internal/gc/go.go b/src/cmd/compile/internal/gc/go.go index 57533237bc..ae1c257e0e 100644 --- a/src/cmd/compile/internal/gc/go.go +++ b/src/cmd/compile/internal/gc/go.go @@ -105,8 +105,6 @@ var nsyntaxerrors int var decldepth int32 -var safemode bool - var nolocalimports bool var Debug [256]int diff --git a/src/cmd/compile/internal/gc/inl.go b/src/cmd/compile/internal/gc/inl.go index e364104a46..ae37c956a2 100644 --- a/src/cmd/compile/internal/gc/inl.go +++ b/src/cmd/compile/internal/gc/inl.go @@ -87,9 +87,6 @@ func typecheckinl(fn *Node) { fmt.Printf("typecheck import [%v] %L { %#v }\n", fn.Sym, fn, asNodes(fn.Func.Inl.Body)) } - save_safemode := safemode - safemode = false - savefn := Curfn Curfn = fn typecheckslice(fn.Func.Inl.Body, Etop) @@ -102,8 +99,6 @@ func typecheckinl(fn *Node) { fn.Func.Inl.Dcl = append(fn.Func.Inl.Dcl, fn.Func.Dcl...) fn.Func.Dcl = nil - safemode = save_safemode - lineno = lno } @@ -803,23 +798,6 @@ func (v *reassignVisitor) visitList(l Nodes) *Node { return nil } -// The result of mkinlcall MUST be assigned back to n, e.g. -// n.Left = mkinlcall(n.Left, fn, isddd) -func mkinlcall(n *Node, fn *Node, maxCost int32) *Node { - save_safemode := safemode - - // imported functions may refer to unsafe as long as the - // package was marked safe during import (already checked). - pkg := fnpkg(fn) - - if pkg != localpkg && pkg != nil { - safemode = false - } - n = mkinlcall1(n, fn, maxCost) - safemode = save_safemode - return n -} - func tinlvar(t *types.Field, inlvars map[*Node]*Node) *Node { if n := asNode(t.Nname); n != nil && !n.isBlank() { inlvar := inlvars[n] @@ -839,9 +817,9 @@ var inlgen int // On return ninit has the parameter assignments, the nbody is the // inlined function body and list, rlist contain the input, output // parameters. -// The result of mkinlcall1 MUST be assigned back to n, e.g. -// n.Left = mkinlcall1(n.Left, fn, isddd) -func mkinlcall1(n, fn *Node, maxCost int32) *Node { +// The result of mkinlcall MUST be assigned back to n, e.g. +// n.Left = mkinlcall(n.Left, fn, isddd) +func mkinlcall(n, fn *Node, maxCost int32) *Node { if fn.Func.Inl == nil { // No inlinable body. return n diff --git a/src/cmd/compile/internal/gc/main.go b/src/cmd/compile/internal/gc/main.go index 5b159e3661..68aac8b99e 100644 --- a/src/cmd/compile/internal/gc/main.go +++ b/src/cmd/compile/internal/gc/main.go @@ -228,7 +228,6 @@ func Main(archInit func(*Arch)) { } objabi.Flagcount("s", "warn about composite literals that can be simplified", &Debug['s']) flag.StringVar(&pathPrefix, "trimpath", "", "remove `prefix` from recorded source file paths") - flag.BoolVar(&safemode, "u", false, "reject unsafe code") flag.BoolVar(&Debug_vlog, "v", false, "increase debug verbosity") objabi.Flagcount("w", "debug type checking", &Debug['w']) flag.BoolVar(&use_writebarrier, "wb", true, "enable write barrier") @@ -840,7 +839,7 @@ func islocalname(name string) bool { func findpkg(name string) (file string, ok bool) { if islocalname(name) { - if safemode || nolocalimports { + if nolocalimports { return "", false } @@ -982,11 +981,6 @@ func importfile(f *Val) *types.Pkg { } if path_ == "unsafe" { - if safemode { - yyerror("cannot import package unsafe") - errorexit() - } - imported_unsafe = true return unsafepkg } @@ -1060,7 +1054,6 @@ func importfile(f *Val) *types.Pkg { } // process header lines - safe := false for { p, err = imp.ReadString('\n') if err != nil { @@ -1070,13 +1063,6 @@ func importfile(f *Val) *types.Pkg { if p == "\n" { break // header ends with blank line } - if strings.HasPrefix(p, "safe") { - safe = true - break // ok to ignore rest - } - } - if safemode && !safe { - yyerror("cannot import unsafe package %q", importpkg.Path) } // assume files move (get installed) so don't record the full path diff --git a/src/cmd/compile/internal/gc/obj.go b/src/cmd/compile/internal/gc/obj.go index aed0f060cf..5976cffd06 100644 --- a/src/cmd/compile/internal/gc/obj.go +++ b/src/cmd/compile/internal/gc/obj.go @@ -81,12 +81,7 @@ func printObjHeader(bout *bio.Writer) { if localpkg.Name == "main" { fmt.Fprintf(bout, "main\n") } - if safemode { - fmt.Fprintf(bout, "safe\n") - } else { - fmt.Fprintf(bout, "----\n") // room for some other tool to write "safe" - } - fmt.Fprintf(bout, "\n") // header ends with blank line + fmt.Fprintf(bout, "\n") // header ends with blank line } func startArchiveEntry(bout *bio.Writer) int64 { diff --git a/src/cmd/compile/internal/gc/subr.go b/src/cmd/compile/internal/gc/subr.go index 7c9c8a157d..fcfc7ac2de 100644 --- a/src/cmd/compile/internal/gc/subr.go +++ b/src/cmd/compile/internal/gc/subr.go @@ -670,13 +670,6 @@ func assignop(src *types.Type, dst *types.Type, why *string) Op { *why = "" } - // TODO(rsc,lvd): This behaves poorly in the presence of inlining. - // https://golang.org/issue/2795 - if safemode && !inimport && src != nil && src.Etype == TUNSAFEPTR { - yyerror("cannot use unsafe.Pointer") - errorexit() - } - if src == dst { return OCONVNOP } diff --git a/src/cmd/compile/internal/gc/typecheck.go b/src/cmd/compile/internal/gc/typecheck.go index d2354e47be..617215c702 100644 --- a/src/cmd/compile/internal/gc/typecheck.go +++ b/src/cmd/compile/internal/gc/typecheck.go @@ -2112,10 +2112,6 @@ func typecheck1(n *Node, top int) *Node { } } - if safemode && !inimport && !compiling_wrappers && t != nil && t.Etype == TUNSAFEPTR { - yyerror("cannot use unsafe.Pointer") - } - evconst(n) if n.Op == OTYPE && top&Etype == 0 { if !n.Type.Broke() { diff --git a/src/cmd/compile/internal/gc/walk.go b/src/cmd/compile/internal/gc/walk.go index 9868a33ba9..2d84302116 100644 --- a/src/cmd/compile/internal/gc/walk.go +++ b/src/cmd/compile/internal/gc/walk.go @@ -3243,17 +3243,6 @@ func walkcompare(n *Node, init *Nodes) *Node { n.Left = walkexpr(n.Left, init) n.Right = walkexpr(n.Right, init) - // Disable safemode while compiling this code: the code we - // generate internally can refer to unsafe.Pointer. - // In this case it can happen if we need to generate an == - // for a struct containing a reflect.Value, which itself has - // an unexported field of type unsafe.Pointer. - old_safemode := safemode - safemode = false - defer func() { - safemode = old_safemode - }() - // Given interface value l and concrete value r, rewrite // l == r // into types-equal && data-equal. diff --git a/test/unsafereject1.go b/test/unsafereject1.go deleted file mode 100644 index 12f77f963f..0000000000 --- a/test/unsafereject1.go +++ /dev/null @@ -1,16 +0,0 @@ -// errorcheck -u -+ - -// Copyright 2018 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Check that we cannot import a package that uses "unsafe" internally -// when -u is supplied. - -package main - -import "syscall" // ERROR "import unsafe package" - -func main() { - print(syscall.Environ()) -} diff --git a/test/unsafereject2.go b/test/unsafereject2.go deleted file mode 100644 index 04ad0578c9..0000000000 --- a/test/unsafereject2.go +++ /dev/null @@ -1,15 +0,0 @@ -// errorcheck -u -+ - -// Copyright 2018 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Check that we cannot import the "unsafe" package when -u is supplied. - -package a - -import "unsafe" // ERROR "import package unsafe" - -func Float32bits(f float32) uint32 { - return *(*uint32)(unsafe.Pointer(&f)) -} From 5ddec2488862899a31688025004bfffa5f7b242b Mon Sep 17 00:00:00 2001 From: Jordan Rhee Date: Wed, 17 Oct 2018 09:41:09 -0700 Subject: [PATCH 164/240] os: change UserHomeDir to use USERPROFILE on windows Fixes #28182 Change-Id: I49c2117fba6325c234512f937ff2edfa9477f52f Reviewed-on: https://go-review.googlesource.com/c/142886 Reviewed-by: Brad Fitzpatrick Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot --- src/os/file.go | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/os/file.go b/src/os/file.go index 3e626a023a..d9c5c57c17 100644 --- a/src/os/file.go +++ b/src/os/file.go @@ -384,12 +384,12 @@ func UserCacheDir() (string, error) { // UserHomeDir returns the current user's home directory. // // On Unix, including macOS, it returns the $HOME environment variable. -// On Windows, it returns the concatenation of %HOMEDRIVE% and %HOMEPATH%. +// On Windows, it returns %USERPROFILE%. // On Plan 9, it returns the $home environment variable. func UserHomeDir() string { switch runtime.GOOS { case "windows": - return Getenv("HOMEDRIVE") + Getenv("HOMEPATH") + return Getenv("USERPROFILE") case "plan9": return Getenv("home") case "nacl", "android": From 19b264e7bfb47526607d68dd5e1adc2b9f7d058f Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Tue, 16 Oct 2018 18:18:40 -0700 Subject: [PATCH 165/240] cmd/cgo: mangle names before rewriting calls Move name mangling before rewriting calls rather than after. This is in preparation for later changes. Change-Id: I74bc351f4290dad7ebf6d0d361bb684087786053 Reviewed-on: https://go-review.googlesource.com/c/142881 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/cmd/cgo/gcc.go | 39 ++++++++++++++++++++++----------------- 1 file changed, 22 insertions(+), 17 deletions(-) diff --git a/src/cmd/cgo/gcc.go b/src/cmd/cgo/gcc.go index 3058fc5f34..858f539915 100644 --- a/src/cmd/cgo/gcc.go +++ b/src/cmd/cgo/gcc.go @@ -188,6 +188,7 @@ func (p *Package) Translate(f *File) { break } } + p.prepareNames(f) if p.rewriteCalls(f) { // Add `import _cgo_unsafe "unsafe"` after the package statement. f.Edit.Insert(f.offset(f.AST.Name.End()), "; import _cgo_unsafe \"unsafe\"") @@ -679,6 +680,27 @@ func (p *Package) recordTypedefs1(dtype dwarf.Type, visited map[dwarf.Type]bool) } } +// prepareNames finalizes the Kind field of not-type names and sets +// the mangled name of all names. +func (p *Package) prepareNames(f *File) { + for _, n := range f.Name { + if n.Kind == "not-type" { + if n.Define == "" { + n.Kind = "var" + } else { + n.Kind = "macro" + n.FuncType = &FuncType{ + Result: n.Type, + Go: &ast.FuncType{ + Results: &ast.FieldList{List: []*ast.Field{{Type: n.Type.Go}}}, + }, + } + } + } + p.mangleName(n) + } +} + // mangleName does name mangling to translate names // from the original Go source files to the names // used in the final Go files generated by cgo. @@ -1130,24 +1152,7 @@ func (p *Package) rewriteRef(f *File) { // code for them. functions := make(map[string]bool) - // Assign mangled names. for _, n := range f.Name { - if n.Kind == "not-type" { - if n.Define == "" { - n.Kind = "var" - } else { - n.Kind = "macro" - n.FuncType = &FuncType{ - Result: n.Type, - Go: &ast.FuncType{ - Results: &ast.FieldList{List: []*ast.Field{{Type: n.Type.Go}}}, - }, - } - } - } - if n.Mangle == "" { - p.mangleName(n) - } if n.Kind == "func" { functions[n.Go] = false } From af95199421acb319b0b1e549cf7f4345f474f75e Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Tue, 16 Oct 2018 18:32:35 -0700 Subject: [PATCH 166/240] cmd/cgo: split name rewriting out of rewriteRef This is in preparation for later changes. Change-Id: I2b9b77a782cf65a2fcec5e700ec6bb8b1476f6b5 Reviewed-on: https://go-review.googlesource.com/c/142882 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/cmd/cgo/gcc.go | 201 ++++++++++++++++++++++++--------------------- 1 file changed, 107 insertions(+), 94 deletions(-) diff --git a/src/cmd/cgo/gcc.go b/src/cmd/cgo/gcc.go index 858f539915..ef59261714 100644 --- a/src/cmd/cgo/gcc.go +++ b/src/cmd/cgo/gcc.go @@ -1166,104 +1166,16 @@ func (p *Package) rewriteRef(f *File) { if r.Name.IsConst() && r.Name.Const == "" { error_(r.Pos(), "unable to find value of constant C.%s", fixGo(r.Name.Go)) } - var expr ast.Expr = ast.NewIdent(r.Name.Mangle) // default - switch r.Context { - case ctxCall, ctxCall2: - if r.Name.Kind != "func" { - if r.Name.Kind == "type" { - r.Context = ctxType - if r.Name.Type == nil { - error_(r.Pos(), "invalid conversion to C.%s: undefined C type '%s'", fixGo(r.Name.Go), r.Name.C) - break - } - expr = r.Name.Type.Go - break - } - error_(r.Pos(), "call of non-function C.%s", fixGo(r.Name.Go)) - break - } - functions[r.Name.Go] = true - if r.Context == ctxCall2 { - if r.Name.Go == "_CMalloc" { - error_(r.Pos(), "no two-result form for C.malloc") - break - } - // Invent new Name for the two-result function. - n := f.Name["2"+r.Name.Go] - if n == nil { - n = new(Name) - *n = *r.Name - n.AddError = true - n.Mangle = "_C2func_" + n.Go - f.Name["2"+r.Name.Go] = n - } - expr = ast.NewIdent(n.Mangle) - r.Name = n - break - } - case ctxExpr: - switch r.Name.Kind { - case "func": - if builtinDefs[r.Name.C] != "" { - error_(r.Pos(), "use of builtin '%s' not in function call", fixGo(r.Name.C)) - } - // Function is being used in an expression, to e.g. pass around a C function pointer. - // Create a new Name for this Ref which causes the variable to be declared in Go land. - fpName := "fp_" + r.Name.Go - name := f.Name[fpName] - if name == nil { - name = &Name{ - Go: fpName, - C: r.Name.C, - Kind: "fpvar", - Type: &Type{Size: p.PtrSize, Align: p.PtrSize, C: c("void*"), Go: ast.NewIdent("unsafe.Pointer")}, - } - p.mangleName(name) - f.Name[fpName] = name - } - r.Name = name - // Rewrite into call to _Cgo_ptr to prevent assignments. The _Cgo_ptr - // function is defined in out.go and simply returns its argument. See - // issue 7757. - expr = &ast.CallExpr{ - Fun: &ast.Ident{NamePos: (*r.Expr).Pos(), Name: "_Cgo_ptr"}, - Args: []ast.Expr{ast.NewIdent(name.Mangle)}, - } - case "type": - // Okay - might be new(T) - if r.Name.Type == nil { - error_(r.Pos(), "expression C.%s: undefined C type '%s'", fixGo(r.Name.Go), r.Name.C) - break - } - expr = r.Name.Type.Go - case "var": - expr = &ast.StarExpr{Star: (*r.Expr).Pos(), X: expr} - case "macro": - expr = &ast.CallExpr{Fun: expr} - } - case ctxSelector: - if r.Name.Kind == "var" { - expr = &ast.StarExpr{Star: (*r.Expr).Pos(), X: expr} - } else { - error_(r.Pos(), "only C variables allowed in selector expression %s", fixGo(r.Name.Go)) - } - case ctxType: - if r.Name.Kind != "type" { - error_(r.Pos(), "expression C.%s used as type", fixGo(r.Name.Go)) - } else if r.Name.Type == nil { - // Use of C.enum_x, C.struct_x or C.union_x without C definition. - // GCC won't raise an error when using pointers to such unknown types. - error_(r.Pos(), "type C.%s: undefined C type '%s'", fixGo(r.Name.Go), r.Name.C) - } else { - expr = r.Name.Type.Go - } - default: - if r.Name.Kind == "func" { - error_(r.Pos(), "must call C.%s", fixGo(r.Name.Go)) + if r.Name.Kind == "func" { + switch r.Context { + case ctxCall, ctxCall2: + functions[r.Name.Go] = true } } + expr := p.rewriteName(f, r) + if *godefs { // Substitute definition for mangled type name. if id, ok := expr.(*ast.Ident); ok { @@ -1306,6 +1218,107 @@ func (p *Package) rewriteRef(f *File) { } } +// rewriteName returns the expression used to rewrite a reference. +func (p *Package) rewriteName(f *File, r *Ref) ast.Expr { + var expr ast.Expr = ast.NewIdent(r.Name.Mangle) // default + switch r.Context { + case ctxCall, ctxCall2: + if r.Name.Kind != "func" { + if r.Name.Kind == "type" { + r.Context = ctxType + if r.Name.Type == nil { + error_(r.Pos(), "invalid conversion to C.%s: undefined C type '%s'", fixGo(r.Name.Go), r.Name.C) + break + } + expr = r.Name.Type.Go + break + } + error_(r.Pos(), "call of non-function C.%s", fixGo(r.Name.Go)) + break + } + if r.Context == ctxCall2 { + if r.Name.Go == "_CMalloc" { + error_(r.Pos(), "no two-result form for C.malloc") + break + } + // Invent new Name for the two-result function. + n := f.Name["2"+r.Name.Go] + if n == nil { + n = new(Name) + *n = *r.Name + n.AddError = true + n.Mangle = "_C2func_" + n.Go + f.Name["2"+r.Name.Go] = n + } + expr = ast.NewIdent(n.Mangle) + r.Name = n + break + } + case ctxExpr: + switch r.Name.Kind { + case "func": + if builtinDefs[r.Name.C] != "" { + error_(r.Pos(), "use of builtin '%s' not in function call", fixGo(r.Name.C)) + } + + // Function is being used in an expression, to e.g. pass around a C function pointer. + // Create a new Name for this Ref which causes the variable to be declared in Go land. + fpName := "fp_" + r.Name.Go + name := f.Name[fpName] + if name == nil { + name = &Name{ + Go: fpName, + C: r.Name.C, + Kind: "fpvar", + Type: &Type{Size: p.PtrSize, Align: p.PtrSize, C: c("void*"), Go: ast.NewIdent("unsafe.Pointer")}, + } + p.mangleName(name) + f.Name[fpName] = name + } + r.Name = name + // Rewrite into call to _Cgo_ptr to prevent assignments. The _Cgo_ptr + // function is defined in out.go and simply returns its argument. See + // issue 7757. + expr = &ast.CallExpr{ + Fun: &ast.Ident{NamePos: (*r.Expr).Pos(), Name: "_Cgo_ptr"}, + Args: []ast.Expr{ast.NewIdent(name.Mangle)}, + } + case "type": + // Okay - might be new(T) + if r.Name.Type == nil { + error_(r.Pos(), "expression C.%s: undefined C type '%s'", fixGo(r.Name.Go), r.Name.C) + break + } + expr = r.Name.Type.Go + case "var": + expr = &ast.StarExpr{Star: (*r.Expr).Pos(), X: expr} + case "macro": + expr = &ast.CallExpr{Fun: expr} + } + case ctxSelector: + if r.Name.Kind == "var" { + expr = &ast.StarExpr{Star: (*r.Expr).Pos(), X: expr} + } else { + error_(r.Pos(), "only C variables allowed in selector expression %s", fixGo(r.Name.Go)) + } + case ctxType: + if r.Name.Kind != "type" { + error_(r.Pos(), "expression C.%s used as type", fixGo(r.Name.Go)) + } else if r.Name.Type == nil { + // Use of C.enum_x, C.struct_x or C.union_x without C definition. + // GCC won't raise an error when using pointers to such unknown types. + error_(r.Pos(), "type C.%s: undefined C type '%s'", fixGo(r.Name.Go), r.Name.C) + } else { + expr = r.Name.Type.Go + } + default: + if r.Name.Kind == "func" { + error_(r.Pos(), "must call C.%s", fixGo(r.Name.Go)) + } + } + return expr +} + // gccBaseCmd returns the start of the compiler command line. // It uses $CC if set, or else $GCC, or else the compiler recorded // during the initial build as defaultCC. From 1d18f66dc82088a3a3d39410866157e3e1e44554 Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Tue, 16 Oct 2018 21:36:34 -0700 Subject: [PATCH 167/240] cmd/cgo: write a string rather than building an AST This generates the same code as before, but does so directly rather than building an AST and printing that. This is in preparation for later changes. Change-Id: Ifec141120bcc74847f0bff8d3d47306bfe69b454 Reviewed-on: https://go-review.googlesource.com/c/142883 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/cmd/cgo/gcc.go | 238 +++++++++++++++++++++--------------------- src/cmd/cgo/godefs.go | 6 ++ 2 files changed, 126 insertions(+), 118 deletions(-) diff --git a/src/cmd/cgo/gcc.go b/src/cmd/cgo/gcc.go index ef59261714..e3bed86919 100644 --- a/src/cmd/cgo/gcc.go +++ b/src/cmd/cgo/gcc.go @@ -744,16 +744,19 @@ func (p *Package) rewriteCalls(f *File) bool { // argument and then calls the original function. // This returns whether the package needs to import unsafe as _cgo_unsafe. func (p *Package) rewriteCall(f *File, call *Call, name *Name) bool { + params := name.FuncType.Params + args := call.Call.Args + // Avoid a crash if the number of arguments is // less than the number of parameters. // This will be caught when the generated file is compiled. - if len(call.Call.Args) < len(name.FuncType.Params) { + if len(args) < len(params) { return false } any := false - for i, param := range name.FuncType.Params { - if p.needsPointerCheck(f, param.Go, call.Call.Args[i]) { + for i, param := range params { + if p.needsPointerCheck(f, param.Go, args[i]) { any = true break } @@ -772,127 +775,108 @@ func (p *Package) rewriteCall(f *File, call *Call, name *Name) bool { // Using a function literal like this lets us do correct // argument type checking, and works correctly if the call is // deferred. + var sb bytes.Buffer + sb.WriteString("func(") + needsUnsafe := false - params := make([]*ast.Field, len(name.FuncType.Params)) - nargs := make([]ast.Expr, len(name.FuncType.Params)) - var stmts []ast.Stmt - for i, param := range name.FuncType.Params { - // params is going to become the parameters of the - // function literal. - // nargs is going to become the list of arguments made - // by the call within the function literal. - // nparam is the parameter of the function literal that - // corresponds to param. - origArg := call.Call.Args[i] - nparam := ast.NewIdent(fmt.Sprintf("_cgo%d", i)) - nargs[i] = nparam + for i, param := range params { + if i > 0 { + sb.WriteString(", ") + } + + fmt.Fprintf(&sb, "_cgo%d ", i) - // The Go version of the C type might use unsafe.Pointer, - // but the file might not import unsafe. - // Rewrite the Go type if necessary to use _cgo_unsafe. ptype := p.rewriteUnsafe(param.Go) if ptype != param.Go { needsUnsafe = true } + sb.WriteString(gofmtLine(ptype)) + } - params[i] = &ast.Field{ - Names: []*ast.Ident{nparam}, - Type: ptype, - } + sb.WriteString(")") - if !p.needsPointerCheck(f, param.Go, origArg) { + result := false + twoResults := false + + // Check whether this call expects two results. + for _, ref := range f.Ref { + if ref.Expr != &call.Call.Fun { continue } - - // Run the cgo pointer checks on nparam. - - // Change the function literal to call the real function - // with the parameter passed through _cgoCheckPointer. - c := &ast.CallExpr{ - Fun: ast.NewIdent("_cgoCheckPointer"), - Args: []ast.Expr{ - nparam, - }, + if ref.Context == ctxCall2 { + sb.WriteString(" (") + result = true + twoResults = true } - - // Add optional additional arguments for an address - // expression. - c.Args = p.checkAddrArgs(f, c.Args, origArg) - - stmt := &ast.ExprStmt{ - X: c, - } - stmts = append(stmts, stmt) + break } - const cgoMarker = "__cgo__###__marker__" - fcall := &ast.CallExpr{ - Fun: ast.NewIdent(cgoMarker), - Args: nargs, - } - ftype := &ast.FuncType{ - Params: &ast.FieldList{ - List: params, - }, - } + // Add the result type, if any. if name.FuncType.Result != nil { rtype := p.rewriteUnsafe(name.FuncType.Result.Go) if rtype != name.FuncType.Result.Go { needsUnsafe = true } - ftype.Results = &ast.FieldList{ - List: []*ast.Field{ - &ast.Field{ - Type: rtype, - }, - }, + if !twoResults { + sb.WriteString(" ") } + sb.WriteString(gofmtLine(rtype)) + result = true } - // If this call expects two results, we have to - // adjust the results of the function we generated. - for _, ref := range f.Ref { - if ref.Expr == &call.Call.Fun && ref.Context == ctxCall2 { - if ftype.Results == nil { - // An explicit void argument - // looks odd but it seems to - // be how cgo has worked historically. - ftype.Results = &ast.FieldList{ - List: []*ast.Field{ - &ast.Field{ - Type: ast.NewIdent("_Ctype_void"), - }, - }, - } - } - ftype.Results.List = append(ftype.Results.List, - &ast.Field{ - Type: ast.NewIdent("error"), - }) + // Add the second result type, if any. + if twoResults { + if name.FuncType.Result == nil { + // An explicit void result looks odd but it + // seems to be how cgo has worked historically. + sb.WriteString("_Ctype_void") } + sb.WriteString(", error)") } - var fbody ast.Stmt - if ftype.Results == nil { - fbody = &ast.ExprStmt{ - X: fcall, + sb.WriteString(" { ") + + for i, param := range params { + arg := args[i] + if !p.needsPointerCheck(f, param.Go, arg) { + continue } - } else { - fbody = &ast.ReturnStmt{ - Results: []ast.Expr{fcall}, + + // Check for &a[i]. + if p.checkIndex(&sb, f, arg, i) { + continue } + + // Check for &x. + if p.checkAddr(&sb, arg, i) { + continue + } + + fmt.Fprintf(&sb, "_cgoCheckPointer(_cgo%d); ", i) } - lit := &ast.FuncLit{ - Type: ftype, - Body: &ast.BlockStmt{ - List: append(stmts, fbody), - }, + + if result { + sb.WriteString("return ") } - text := strings.Replace(gofmt(lit), "\n", ";", -1) - repl := strings.Split(text, cgoMarker) - f.Edit.Insert(f.offset(call.Call.Fun.Pos()), repl[0]) - f.Edit.Insert(f.offset(call.Call.Fun.End()), repl[1]) + + // Now we are ready to call the C function. + // To work smoothly with rewriteRef we leave the call in place + // and just insert our new arguments between the function + // and the old arguments. + f.Edit.Insert(f.offset(call.Call.Fun.Pos()), sb.String()) + + sb.Reset() + sb.WriteString("(") + for i := range params { + if i > 0 { + sb.WriteString(", ") + } + fmt.Fprintf(&sb, "_cgo%d", i) + } + sb.WriteString("); }") + + f.Edit.Insert(f.offset(call.Call.Lparen), sb.String()) return needsUnsafe } @@ -1001,19 +985,13 @@ func (p *Package) hasPointer(f *File, t ast.Expr, top bool) bool { } } -// checkAddrArgs tries to add arguments to the call of -// _cgoCheckPointer when the argument is an address expression. We -// pass true to mean that the argument is an address operation of -// something other than a slice index, which means that it's only -// necessary to check the specific element pointed to, not the entire -// object. This is for &s.f, where f is a field in a struct. We can -// pass a slice or array, meaning that we should check the entire -// slice or array but need not check any other part of the object. -// This is for &s.a[i], where we need to check all of a. However, we -// only pass the slice or array if we can refer to it without side -// effects. -func (p *Package) checkAddrArgs(f *File, args []ast.Expr, x ast.Expr) []ast.Expr { +// checkIndex checks whether arg the form &a[i], possibly inside type +// conversions. If so, and if a has no side effects, it writes +// _cgoCheckPointer(_cgoNN, a) to sb and returns true. This tells +// _cgoCheckPointer to check the complete contents of the slice. +func (p *Package) checkIndex(sb *bytes.Buffer, f *File, arg ast.Expr, i int) bool { // Strip type conversions. + x := arg for { c, ok := x.(*ast.CallExpr) if !ok || len(c.Args) != 1 || !p.isType(c.Fun) { @@ -1023,22 +1001,46 @@ func (p *Package) checkAddrArgs(f *File, args []ast.Expr, x ast.Expr) []ast.Expr } u, ok := x.(*ast.UnaryExpr) if !ok || u.Op != token.AND { - return args + return false } index, ok := u.X.(*ast.IndexExpr) if !ok { - // This is the address of something that is not an - // index expression. We only need to examine the - // single value to which it points. - // TODO: what if true is shadowed? - return append(args, ast.NewIdent("true")) + return false } - if !p.hasSideEffects(f, index.X) { - // Examine the entire slice. - return append(args, index.X) + if p.hasSideEffects(f, index.X) { + return false } - // Treat the pointer as unknown. - return args + + fmt.Fprintf(sb, "_cgoCheckPointer(_cgo%d, %s); ", i, gofmtLine(index.X)) + + return true +} + +// checkAddr checks whether arg has the form &x, possibly inside type +// conversions. If so it writes _cgoCheckPointer(_cgoNN, true) to sb +// and returns true. This tells _cgoCheckPointer to check just the +// contents of the pointer being passed, not any other part of the +// memory allocation. This is run after checkIndex, which looks for +// the special case of &a[i], which requires different checks. +func (p *Package) checkAddr(sb *bytes.Buffer, arg ast.Expr, i int) bool { + // Strip type conversions. + px := &arg + for { + c, ok := (*px).(*ast.CallExpr) + if !ok || len(c.Args) != 1 || !p.isType(c.Fun) { + break + } + px = &c.Args[0] + } + if u, ok := (*px).(*ast.UnaryExpr); !ok || u.Op != token.AND { + return false + } + + // Use "0 == 0" to do the right thing in the unlikely event + // that "true" is shadowed. + fmt.Fprintf(sb, "_cgoCheckPointer(_cgo%d, 0 == 0); ", i) + + return true } // hasSideEffects returns whether the expression x has any side diff --git a/src/cmd/cgo/godefs.go b/src/cmd/cgo/godefs.go index 6720945cdd..9c763a22fb 100644 --- a/src/cmd/cgo/godefs.go +++ b/src/cmd/cgo/godefs.go @@ -126,3 +126,9 @@ func gofmt(n interface{}) string { } return gofmtBuf.String() } + +// gofmtLine returns the gofmt-formatted string for an AST node, +// ensuring that it is on a single line. +func gofmtLine(n interface{}) string { + return strings.Replace(gofmt(n), "\n", ";", -1) +} From dc75744f9c16e6af08f3e4677f28850b874ecc51 Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Wed, 17 Oct 2018 12:46:20 -0700 Subject: [PATCH 168/240] os/signal: wait for goroutine in TestTerminalSignal Fixes #28169 Change-Id: I187d9effea56357bbb04d4971d284a52ffae61f8 Reviewed-on: https://go-review.googlesource.com/c/142889 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/os/signal/signal_cgo_test.go | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/src/os/signal/signal_cgo_test.go b/src/os/signal/signal_cgo_test.go index 16aeea8221..3c23090489 100644 --- a/src/os/signal/signal_cgo_test.go +++ b/src/os/signal/signal_cgo_test.go @@ -22,6 +22,7 @@ import ( "os/signal/internal/pty" "strconv" "strings" + "sync" "syscall" "testing" "time" @@ -113,7 +114,11 @@ func TestTerminalSignal(t *testing.T) { const prompt = "prompt> " // Read data from master in the background. + var wg sync.WaitGroup + wg.Add(1) + defer wg.Wait() go func() { + defer wg.Done() input := bufio.NewReader(master) var line, handled []byte for { From bb3e2117777a2d9438bab0ab9e386e22662aa499 Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Tue, 16 Oct 2018 16:50:25 -0700 Subject: [PATCH 169/240] spec: clarify rules for receiver base types The spec currently provides a syntactic rule for receiver base types, and a strict reading of those rules prohibits the use of type aliases referring to pointer types as receiver types. This strict interpretation breaks an assumed rule for aliases, which is that a type literal can always be replaced by an alias denoting that literal. Furthermore, cmd/compile always accepted this new formulation of the receiver type rules and so this change will simply validate what has been implemented all along. Fixes #27995. Change-Id: I032289c926a4f070d6f7795431d86635fe64d907 Reviewed-on: https://go-review.googlesource.com/c/142757 Reviewed-by: Ian Lance Taylor Reviewed-by: Rob Pike Reviewed-by: Matthew Dempsky --- doc/go_spec.html | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/doc/go_spec.html b/doc/go_spec.html index 6c7f2aa902..b8e11e83a4 100644 --- a/doc/go_spec.html +++ b/doc/go_spec.html @@ -1,6 +1,6 @@ @@ -2202,11 +2202,11 @@ Receiver = Parameters .

    The receiver is specified via an extra parameter section preceding the method name. That parameter section must declare a single non-variadic parameter, the receiver. -Its type must be of the form T or *T (possibly using -parentheses) where T is a type name. The type denoted by T is called -the receiver base type; it must not be a pointer or interface type and -it must be defined in the same package as the method. -The method is said to be bound to the base type and the method name +Its type must be a defined type T or a +pointer to a defined type T. T is called the receiver +base type. A receiver base type cannot be a pointer or interface type and +it must be defined in the same package as the method. +The method is said to be bound to its receiver base type and the method name is visible only within selectors for type T or *T.

    @@ -2226,7 +2226,7 @@ the non-blank method and field names must be distinct.

    -Given type Point, the declarations +Given defined type Point, the declarations 

    
From 4bea6c65947caf815ad4dde8bf50c43dcca539be Mon Sep 17 00:00:00 2001
From: Robert Griesemer 
Date: Wed, 17 Oct 2018 14:15:54 -0700
Subject: [PATCH 170/240] go/internal/gccgoimporter: backport from x/tools to
 ensure identical code

This change backports a minor modification of the x/tools version of this
code back into the std library. It simply ensures that both versions of
the code are the same and will simplify keeping them in sync down the
road.

While this is an API change, this is an internal package, so we're ok.

Updates #27891.

Change-Id: Ib153141382f727a2692ca80179ae09c4a383ba4f
Reviewed-on: https://go-review.googlesource.com/c/142894
Reviewed-by: Alan Donovan 
---
 src/go/internal/gccgoimporter/gccgoinstallation.go | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/go/internal/gccgoimporter/gccgoinstallation.go b/src/go/internal/gccgoimporter/gccgoinstallation.go
index 622dfc8b69..8fc7ce3232 100644
--- a/src/go/internal/gccgoimporter/gccgoinstallation.go
+++ b/src/go/internal/gccgoimporter/gccgoinstallation.go
@@ -26,8 +26,10 @@ type GccgoInstallation struct {
 }
 
 // Ask the driver at the given path for information for this GccgoInstallation.
-func (inst *GccgoInstallation) InitFromDriver(gccgoPath string) (err error) {
-	cmd := exec.Command(gccgoPath, "-###", "-S", "-x", "go", "-")
+// The given arguments are passed directly to the call of the driver.
+func (inst *GccgoInstallation) InitFromDriver(gccgoPath string, args ...string) (err error) {
+	argv := append([]string{"-###", "-S", "-x", "go", "-"}, args...)
+	cmd := exec.Command(gccgoPath, argv...)
 	stderr, err := cmd.StderrPipe()
 	if err != nil {
 		return
@@ -55,7 +57,8 @@ func (inst *GccgoInstallation) InitFromDriver(gccgoPath string) (err error) {
 		}
 	}
 
-	stdout, err := exec.Command(gccgoPath, "-dumpversion").Output()
+	argv = append([]string{"-dumpversion"}, args...)
+	stdout, err := exec.Command(gccgoPath, argv...).Output()
 	if err != nil {
 		return
 	}

From 398b54df56ed57e3e1b333d7621dac414eda612e Mon Sep 17 00:00:00 2001
From: Alan Donovan 
Date: Tue, 16 Oct 2018 14:35:01 -0400
Subject: [PATCH 171/240] cmd/go: make go vet query cmd/vet for its flags

Add -flags flag to cmd/vet that causes it to describe its flags as JSON.

go vet's "-vettool" flag has been replaced with an environment
variable, GOVETTOOL, for two reasons:

  1) we need its value before flag processing,
     because we must run vet to discover its flags.

  2) users may change the env var to opt in/out of the new vet tool
     during the upcoming transition to vet based on the analysis API.

Change-Id: I5d8f90817623022f4170b88fab3c92c9b2fbdc37
Reviewed-on: https://go-review.googlesource.com/c/142617
Run-TryBot: Alan Donovan 
TryBot-Result: Gobot Gobot 
Reviewed-by: Bryan C. Mills 
---
 src/cmd/go/internal/vet/vetflag.go  | 121 +++++++++++++++++-----------
 src/cmd/go/internal/work/buildid.go |   2 +-
 src/cmd/vet/main.go                 |  30 ++++++-
 src/cmd/vet/vet_test.go             |   3 +-
 4 files changed, 105 insertions(+), 51 deletions(-)

diff --git a/src/cmd/go/internal/vet/vetflag.go b/src/cmd/go/internal/vet/vetflag.go
index 50eac425ec..cfa4352cb9 100644
--- a/src/cmd/go/internal/vet/vetflag.go
+++ b/src/cmd/go/internal/vet/vetflag.go
@@ -5,9 +5,14 @@
 package vet
 
 import (
+	"bytes"
+	"encoding/json"
 	"flag"
 	"fmt"
+	"log"
 	"os"
+	"os/exec"
+	"path/filepath"
 	"strings"
 
 	"cmd/go/internal/base"
@@ -16,72 +21,94 @@ import (
 	"cmd/go/internal/work"
 )
 
-const cmd = "vet"
+// go vet flag processing
+//
+// We query the flags of the tool specified by GOVETTOOL (default:
+// cmd/vet) and accept any of those flags plus any flag valid for 'go
+// build'. The tool must support -flags, which prints a description of
+// its flags in JSON to stdout.
 
-// vetFlagDefn is the set of flags we process.
-var vetFlagDefn = []*cmdflag.Defn{
-	// Note: Some flags, in particular -tags and -v, are known to
-	// vet but also defined as build flags. This works fine, so we
-	// don't define them here but use AddBuildFlags to init them.
-	// However some, like -x, are known to the build but not
-	// to vet. We handle them in vetFlags.
+// GOVETTOOL specifies the vet command to run.
+// This must be an environment variable because
+// we need it before flag processing, as we execute
+// $GOVETTOOL to discover the set of flags it supports.
+//
+// Using an environment variable also makes it easy for users to opt in
+// to (and later, opt out of) the new cmd/vet analysis driver during the
+// transition. It is also used by tests.
+var vetTool = os.Getenv("GOVETTOOL")
 
-	// local.
-	{Name: "all", BoolVar: new(bool), PassToTest: true},
-	{Name: "asmdecl", BoolVar: new(bool), PassToTest: true},
-	{Name: "assign", BoolVar: new(bool), PassToTest: true},
-	{Name: "atomic", BoolVar: new(bool), PassToTest: true},
-	{Name: "bool", BoolVar: new(bool), PassToTest: true},
-	{Name: "buildtags", BoolVar: new(bool), PassToTest: true},
-	{Name: "cgocall", BoolVar: new(bool), PassToTest: true},
-	{Name: "composites", BoolVar: new(bool), PassToTest: true},
-	{Name: "copylocks", BoolVar: new(bool), PassToTest: true},
-	{Name: "httpresponse", BoolVar: new(bool), PassToTest: true},
-	{Name: "lostcancel", BoolVar: new(bool), PassToTest: true},
-	{Name: "methods", BoolVar: new(bool), PassToTest: true},
-	{Name: "nilfunc", BoolVar: new(bool), PassToTest: true},
-	{Name: "printf", BoolVar: new(bool), PassToTest: true},
-	{Name: "printfuncs", PassToTest: true},
-	{Name: "rangeloops", BoolVar: new(bool), PassToTest: true},
-	{Name: "shadow", BoolVar: new(bool), PassToTest: true},
-	{Name: "shadowstrict", BoolVar: new(bool), PassToTest: true},
-	{Name: "shift", BoolVar: new(bool), PassToTest: true},
-	{Name: "source", BoolVar: new(bool), PassToTest: true},
-	{Name: "structtags", BoolVar: new(bool), PassToTest: true},
-	{Name: "tests", BoolVar: new(bool), PassToTest: true},
-	{Name: "unreachable", BoolVar: new(bool), PassToTest: true},
-	{Name: "unsafeptr", BoolVar: new(bool), PassToTest: true},
-	{Name: "unusedfuncs", PassToTest: true},
-	{Name: "unusedresult", BoolVar: new(bool), PassToTest: true},
-	{Name: "unusedstringmethods", PassToTest: true},
-}
+// vetFlags processes the command line, splitting it at the first non-flag
+// into the list of flags and list of packages.
+func vetFlags(args []string) (passToVet, packageNames []string) {
+	// Query the vet command for its flags.
+	tool := vetTool
+	if tool != "" {
+		var err error
+		tool, err = filepath.Abs(tool)
+		if err != nil {
+			log.Fatal(err)
+		}
+	} else {
+		tool = base.Tool("vet")
+	}
+	out := new(bytes.Buffer)
+	vetcmd := exec.Command(tool, "-flags")
+	vetcmd.Stdout = out
+	if err := vetcmd.Run(); err != nil {
+		fmt.Fprintf(os.Stderr, "go vet: can't execute %s -flags: %v\n", tool, err)
+		os.Exit(2)
+	}
+	var analysisFlags []struct {
+		Name  string
+		Bool  bool
+		Usage string
+	}
+	if err := json.Unmarshal(out.Bytes(), &analysisFlags); err != nil {
+		fmt.Fprintf(os.Stderr, "go vet: can't unmarshal JSON from %s -flags: %v", tool, err)
+		os.Exit(2)
+	}
 
-var vetTool string
+	// Add vet's flags to vetflagDefn.
+	//
+	// Some flags, in particular -tags and -v, are known to vet but
+	// also defined as build flags. This works fine, so we don't
+	// define them here but use AddBuildFlags to init them.
+	// However some, like -x, are known to the build but not to vet.
+	var vetFlagDefn []*cmdflag.Defn
+	for _, f := range analysisFlags {
+		switch f.Name {
+		case "tags", "v":
+			continue
+		}
+		defn := &cmdflag.Defn{
+			Name:       f.Name,
+			PassToTest: true,
+		}
+		if f.Bool {
+			defn.BoolVar = new(bool)
+		}
+		vetFlagDefn = append(vetFlagDefn, defn)
+	}
 
-// add build flags to vetFlagDefn.
-func init() {
-	cmdflag.AddKnownFlags("vet", vetFlagDefn)
+	// Add build flags to vetFlagDefn.
 	var cmd base.Command
 	work.AddBuildFlags(&cmd)
-	cmd.Flag.StringVar(&vetTool, "vettool", "", "path to vet tool binary") // for cmd/vet tests; undocumented for now
 	cmd.Flag.VisitAll(func(f *flag.Flag) {
 		vetFlagDefn = append(vetFlagDefn, &cmdflag.Defn{
 			Name:  f.Name,
 			Value: f.Value,
 		})
 	})
-}
 
-// vetFlags processes the command line, splitting it at the first non-flag
-// into the list of flags and list of packages.
-func vetFlags(args []string) (passToVet, packageNames []string) {
+	// Process args.
 	args = str.StringList(cmdflag.FindGOFLAGS(vetFlagDefn), args)
 	for i := 0; i < len(args); i++ {
 		if !strings.HasPrefix(args[i], "-") {
 			return args[:i], args[i:]
 		}
 
-		f, value, extraWord := cmdflag.Parse(cmd, vetFlagDefn, args, i)
+		f, value, extraWord := cmdflag.Parse("vet", vetFlagDefn, args, i)
 		if f == nil {
 			fmt.Fprintf(os.Stderr, "vet: flag %q not defined\n", args[i])
 			fmt.Fprintf(os.Stderr, "Run \"go help vet\" for more information\n")
diff --git a/src/cmd/go/internal/work/buildid.go b/src/cmd/go/internal/work/buildid.go
index 8b97e8b75b..af3183ae9a 100644
--- a/src/cmd/go/internal/work/buildid.go
+++ b/src/cmd/go/internal/work/buildid.go
@@ -178,7 +178,7 @@ func (b *Builder) toolID(name string) string {
 	path := base.Tool(name)
 	desc := "go tool " + name
 
-	// Special case: undocumented -vettool overrides usual vet, for testing vet.
+	// Special case: undocumented $GOVETTOOL overrides usual vet, for testing vet.
 	if name == "vet" && VetTool != "" {
 		path = VetTool
 		desc = VetTool
diff --git a/src/cmd/vet/main.go b/src/cmd/vet/main.go
index 6e885121c8..cf91e4d596 100644
--- a/src/cmd/vet/main.go
+++ b/src/cmd/vet/main.go
@@ -22,6 +22,7 @@ import (
 	"go/types"
 	"io"
 	"io/ioutil"
+	"log"
 	"os"
 	"path/filepath"
 	"sort"
@@ -31,10 +32,9 @@ import (
 	"cmd/internal/objabi"
 )
 
-// Important! If you add flags here, make sure to update cmd/go/internal/vet/vetflag.go.
-
 var (
 	verbose = flag.Bool("v", false, "verbose")
+	flags   = flag.Bool("flags", false, "print flags in JSON")
 	source  = flag.Bool("source", false, "import from source instead of compiled object files")
 	tags    = flag.String("tags", "", "space-separated list of build tags to apply when parsing")
 	tagList = []string{} // exploded version of tags flag; set in main
@@ -259,6 +259,32 @@ func main() {
 	flag.Usage = Usage
 	flag.Parse()
 
+	// -flags: print flags as JSON. Used by go vet.
+	if *flags {
+		type jsonFlag struct {
+			Name  string
+			Bool  bool
+			Usage string
+		}
+		var jsonFlags []jsonFlag
+		flag.VisitAll(func(f *flag.Flag) {
+			isBool := false
+			switch v := f.Value.(type) {
+			case interface{ BoolFlag() bool }:
+				isBool = v.BoolFlag()
+			case *triState:
+				isBool = true // go vet should treat it as boolean
+			}
+			jsonFlags = append(jsonFlags, jsonFlag{f.Name, isBool, f.Usage})
+		})
+		data, err := json.MarshalIndent(jsonFlags, "", "\t")
+		if err != nil {
+			log.Fatal(err)
+		}
+		os.Stdout.Write(data)
+		os.Exit(0)
+	}
+
 	// If any flag is set, we run only those checks requested.
 	// If all flag is set true or if no flags are set true, set all the non-experimental ones
 	// not explicitly set (in effect, set the "-all" flag).
diff --git a/src/cmd/vet/vet_test.go b/src/cmd/vet/vet_test.go
index 6b2125924d..da5a6ed87c 100644
--- a/src/cmd/vet/vet_test.go
+++ b/src/cmd/vet/vet_test.go
@@ -118,11 +118,12 @@ func TestVetPrint(t *testing.T) {
 	Build(t)
 	file := filepath.Join("testdata", "print.go")
 	cmd := exec.Command(
-		"go", "vet", "-vettool="+binary,
+		"go", "vet",
 		"-printf",
 		"-printfuncs=Warn:1,Warnf:1",
 		file,
 	)
+	cmd.Env = append(os.Environ(), "GOVETTOOL="+binary)
 	errchk(cmd, []string{file}, t)
 }
 

From 830f424c9b25640d796bb5f1f3c1e2b1d680c11b Mon Sep 17 00:00:00 2001
From: Umang Parmar 
Date: Wed, 17 Oct 2018 08:10:28 +0000
Subject: [PATCH 172/240] database/sql: remove commented debug prints

Fixes #28234

Change-Id: I89090ffb8285c4936b0c9b5c2475849c0643186a
GitHub-Last-Rev: 4dd0ec162d0ce1548045d4119fd3295570f65d85
GitHub-Pull-Request: golang/go#28246
Reviewed-on: https://go-review.googlesource.com/c/142877
Reviewed-by: Brad Fitzpatrick 
---
 src/database/sql/sql.go | 2 --
 1 file changed, 2 deletions(-)

diff --git a/src/database/sql/sql.go b/src/database/sql/sql.go
index 7c8d46b100..1ffe252ee3 100644
--- a/src/database/sql/sql.go
+++ b/src/database/sql/sql.go
@@ -567,7 +567,6 @@ type finalCloser interface {
 // addDep notes that x now depends on dep, and x's finalClose won't be
 // called until all of x's dependencies are removed with removeDep.
 func (db *DB) addDep(x finalCloser, dep interface{}) {
-	//println(fmt.Sprintf("addDep(%T %p, %T %p)", x, x, dep, dep))
 	db.mu.Lock()
 	defer db.mu.Unlock()
 	db.addDepLocked(x, dep)
@@ -597,7 +596,6 @@ func (db *DB) removeDep(x finalCloser, dep interface{}) error {
 }
 
 func (db *DB) removeDepLocked(x finalCloser, dep interface{}) func() error {
-	//println(fmt.Sprintf("removeDep(%T %p, %T %p)", x, x, dep, dep))
 
 	xdep, ok := db.dep[x]
 	if !ok {

From 361cf4a8805051ac3b8829fbcd9d64a0d2f50a71 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor 
Date: Wed, 19 Sep 2018 20:09:02 -0700
Subject: [PATCH 173/240] os: ignore SIGTTIN during TestTTYClose

Otherwise, if the test is run in the background, it will stop waiting
for access to the terminal.

Change-Id: Ib5224c6cb9060281e05c3b00cd2964445421e774
Reviewed-on: https://go-review.googlesource.com/c/136415
Run-TryBot: Ian Lance Taylor 
TryBot-Result: Gobot Gobot 
Reviewed-by: Brad Fitzpatrick 
---
 src/os/timeout_test.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/os/timeout_test.go b/src/os/timeout_test.go
index 1886accb55..4720738d24 100644
--- a/src/os/timeout_test.go
+++ b/src/os/timeout_test.go
@@ -16,8 +16,10 @@ import (
 	"io/ioutil"
 	"math/rand"
 	"os"
+	"os/signal"
 	"runtime"
 	"sync"
+	"syscall"
 	"testing"
 	"time"
 )
@@ -591,6 +593,10 @@ func TestRacyWrite(t *testing.T) {
 
 // Closing a TTY while reading from it should not hang.  Issue 23943.
 func TestTTYClose(t *testing.T) {
+	// Ignore SIGTTIN in case we are running in the background.
+	signal.Ignore(syscall.SIGTTIN)
+	defer signal.Reset(syscall.SIGTTIN)
+
 	f, err := os.Open("/dev/tty")
 	if err != nil {
 		t.Skipf("skipping because opening /dev/tty failed: %v", err)

From 415873409770455b526f905fd4b509c651b5b9d9 Mon Sep 17 00:00:00 2001
From: Ben Shi 
Date: Wed, 17 Oct 2018 10:24:28 +0000
Subject: [PATCH 174/240] test/codegen: add more combined load/store test cases

This CL adds more combined load/store test cases for 386/amd64.

Change-Id: I0a483a6ed0212b65c5e84d67ed8c9f50c389ce2d
Reviewed-on: https://go-review.googlesource.com/c/142878
Run-TryBot: Ben Shi 
TryBot-Result: Gobot Gobot 
Reviewed-by: Keith Randall 
---
 test/codegen/memcombine.go | 62 ++++++++++++++++++++++++++++++++------
 1 file changed, 52 insertions(+), 10 deletions(-)

diff --git a/test/codegen/memcombine.go b/test/codegen/memcombine.go
index d0043da7ef..db49142e25 100644
--- a/test/codegen/memcombine.go
+++ b/test/codegen/memcombine.go
@@ -114,17 +114,21 @@ func load_be16_idx(b []byte, idx int) {
 func load_le_byte2_uint16(s []byte) uint16 {
 	// arm64:`MOVHU\t\(R[0-9]+\)`,-`ORR`,-`MOVB`
 	// 386:`MOVWLZX\s\([A-Z]+\)`,-`MOVB`,-`ORL`
+	// amd64:`MOVWLZX\s\([A-Z]+\)`,-`MOVB`,-`ORL`
 	return uint16(s[0]) | uint16(s[1])<<8
 }
 
 func load_le_byte2_uint16_inv(s []byte) uint16 {
 	// arm64:`MOVHU\t\(R[0-9]+\)`,-`ORR`,-`MOVB`
 	// 386:`MOVWLZX\s\([A-Z]+\)`,-`MOVB`,-`ORL`
+	// amd64:`MOVWLZX\s\([A-Z]+\)`,-`MOVB`,-`ORL`
 	return uint16(s[1])<<8 | uint16(s[0])
 }
 
 func load_le_byte4_uint32(s []byte) uint32 {
 	// arm64:`MOVWU\t\(R[0-9]+\)`,-`ORR`,-`MOV[BH]`
+	// 386:`MOVL\s\([A-Z]+\)`,-`MOVB`,-`OR`-`MOVW`
+	// amd64:`MOVL\s\([A-Z]+\)`,-`MOVB`,-`OR`-`MOVW`
 	return uint32(s[0]) | uint32(s[1])<<8 | uint32(s[2])<<16 | uint32(s[3])<<24
 }
 
@@ -135,21 +139,25 @@ func load_le_byte4_uint32_inv(s []byte) uint32 {
 
 func load_le_byte8_uint64(s []byte) uint64 {
 	// arm64:`MOVD\t\(R[0-9]+\)`,-`ORR`,-`MOV[BHW]`
+	// amd64:`MOVQ\s\([A-Z]+\),\s[A-Z]+`
 	return uint64(s[0]) | uint64(s[1])<<8 | uint64(s[2])<<16 | uint64(s[3])<<24 | uint64(s[4])<<32 | uint64(s[5])<<40 | uint64(s[6])<<48 | uint64(s[7])<<56
 }
 
 func load_le_byte8_uint64_inv(s []byte) uint64 {
 	// arm64:`MOVD\t\(R[0-9]+\)`,-`ORR`,-`MOV[BHW]`
+	// amd64:`MOVQ\s\([A-Z]+\),\s[A-Z]+`
 	return uint64(s[7])<<56 | uint64(s[6])<<48 | uint64(s[5])<<40 | uint64(s[4])<<32 | uint64(s[3])<<24 | uint64(s[2])<<16 | uint64(s[1])<<8 | uint64(s[0])
 }
 
 func load_be_byte2_uint16(s []byte) uint16 {
 	// arm64:`MOVHU\t\(R[0-9]+\)`,`REV16W`,-`ORR`,-`MOVB`
+	// amd64:`MOVWLZX\s\([A-Z]+\)`,-`MOVB`,-`ORL`
 	return uint16(s[0])<<8 | uint16(s[1])
 }
 
 func load_be_byte2_uint16_inv(s []byte) uint16 {
 	// arm64:`MOVHU\t\(R[0-9]+\)`,`REV16W`,-`ORR`,-`MOVB`
+	// amd64:`MOVWLZX\s\([A-Z]+\)`,-`MOVB`,-`ORL`
 	return uint16(s[1]) | uint16(s[0])<<8
 }
 
@@ -160,33 +168,39 @@ func load_be_byte4_uint32(s []byte) uint32 {
 
 func load_be_byte4_uint32_inv(s []byte) uint32 {
 	// arm64:`MOVWU\t\(R[0-9]+\)`,`REVW`,-`ORR`,-`REV16W`,-`MOV[BH]`
+	// amd64:`MOVL\s\([A-Z]+\)`,-`MOVB`,-`OR`,-`MOVW`
 	return uint32(s[3]) | uint32(s[2])<<8 | uint32(s[1])<<16 | uint32(s[0])<<24
 }
 
 func load_be_byte8_uint64(s []byte) uint64 {
 	// arm64:`MOVD\t\(R[0-9]+\)`,`REV`,-`ORR`,-`REVW`,-`REV16W`,-`MOV[BHW]`
+	// amd64:`MOVQ\s\([A-Z]+\),\s[A-Z]+`
 	return uint64(s[0])<<56 | uint64(s[1])<<48 | uint64(s[2])<<40 | uint64(s[3])<<32 | uint64(s[4])<<24 | uint64(s[5])<<16 | uint64(s[6])<<8 | uint64(s[7])
 }
 
 func load_be_byte8_uint64_inv(s []byte) uint64 {
 	// arm64:`MOVD\t\(R[0-9]+\)`,`REV`,-`ORR`,-`REVW`,-`REV16W`,-`MOV[BHW]`
+	// amd64:`MOVQ\s\([A-Z]+\),\s[A-Z]+`
 	return uint64(s[7]) | uint64(s[6])<<8 | uint64(s[5])<<16 | uint64(s[4])<<24 | uint64(s[3])<<32 | uint64(s[2])<<40 | uint64(s[1])<<48 | uint64(s[0])<<56
 }
 
 func load_le_byte2_uint16_idx(s []byte, idx int) uint16 {
 	// arm64:`MOVHU\s\(R[0-9]+\)\(R[0-9]+\)`,-`ORR`,-`MOVB`
 	// 386:`MOVWLZX\s\([A-Z]+\)\([A-Z]+`,-`ORL`,-`MOVB`
+	// amd64:`MOVWLZX\s\([A-Z]+\)\([A-Z]+`,-`OR`,-`MOVB`
 	return uint16(s[idx]) | uint16(s[idx+1])<<8
 }
 
 func load_le_byte2_uint16_idx_inv(s []byte, idx int) uint16 {
 	// arm64:`MOVHU\s\(R[0-9]+\)\(R[0-9]+\)`,-`ORR`,-`MOVB`
 	// 386:`MOVWLZX\s\([A-Z]+\)\([A-Z]+`,-`ORL`,-`MOVB`
+	// amd64:`MOVWLZX\s\([A-Z]+\)\([A-Z]+`,-`OR`,-`MOVB`
 	return uint16(s[idx+1])<<8 | uint16(s[idx])
 }
 
 func load_le_byte4_uint32_idx(s []byte, idx int) uint32 {
 	// arm64:`MOVWU\s\(R[0-9]+\)\(R[0-9]+\)`,-`ORR`,-`MOV[BH]`
+	// amd64:`MOVL\s\([A-Z]+\)\([A-Z]+`,-`OR`,-`MOVB`,-`MOVW`
 	return uint32(s[idx]) | uint32(s[idx+1])<<8 | uint32(s[idx+2])<<16 | uint32(s[idx+3])<<24
 }
 
@@ -197,6 +211,7 @@ func load_le_byte4_uint32_idx_inv(s []byte, idx int) uint32 {
 
 func load_le_byte8_uint64_idx(s []byte, idx int) uint64 {
 	// arm64:`MOVD\s\(R[0-9]+\)\(R[0-9]+\)`,-`ORR`,-`MOV[BHW]`
+	// amd64:`MOVQ\s\([A-Z]+\)\([A-Z]+`
 	return uint64(s[idx]) | uint64(s[idx+1])<<8 | uint64(s[idx+2])<<16 | uint64(s[idx+3])<<24 | uint64(s[idx+4])<<32 | uint64(s[idx+5])<<40 | uint64(s[idx+6])<<48 | uint64(s[idx+7])<<56
 }
 
@@ -207,11 +222,13 @@ func load_le_byte8_uint64_idx_inv(s []byte, idx int) uint64 {
 
 func load_be_byte2_uint16_idx(s []byte, idx int) uint16 {
 	// arm64:`MOVHU\s\(R[0-9]+\)\(R[0-9]+\)`,`REV16W`,-`ORR`,-`MOVB`
+	// amd64:`MOVWLZX\s\([A-Z]+\)\([A-Z]+`,-`OR`,-`MOVB`
 	return uint16(s[idx])<<8 | uint16(s[idx+1])
 }
 
 func load_be_byte2_uint16_idx_inv(s []byte, idx int) uint16 {
 	// arm64:`MOVHU\s\(R[0-9]+\)\(R[0-9]+\)`,`REV16W`,-`ORR`,-`MOVB`
+	// amd64:`MOVWLZX\s\([A-Z]+\)\([A-Z]+`,-`OR`,-`MOVB`
 	return uint16(s[idx+1]) | uint16(s[idx])<<8
 }
 
@@ -410,6 +427,7 @@ func store_le_byte_2(b []byte, val uint16) {
 	_ = b[2]
 	// arm64:`MOVH\sR[0-9]+,\s1\(R[0-9]+\)`,-`MOVB`
 	// 386:`MOVW\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`
+	// amd64:`MOVW\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`
 	b[1], b[2] = byte(val), byte(val>>8)
 }
 
@@ -422,30 +440,36 @@ func store_le_byte_2_inv(b []byte, val uint16) {
 func store_le_byte_4(b []byte, val uint32) {
 	_ = b[4]
 	// arm64:`MOVW\sR[0-9]+,\s1\(R[0-9]+\)`,-`MOVB`,-`MOVH`
+	// 386:`MOVL\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`,-`MOVW`
+	// amd64:`MOVL\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`,-`MOVW`
 	b[1], b[2], b[3], b[4] = byte(val), byte(val>>8), byte(val>>16), byte(val>>24)
 }
 
 func store_le_byte_8(b []byte, val uint64) {
 	_ = b[8]
 	// arm64:`MOVD\sR[0-9]+,\s1\(R[0-9]+\)`,-`MOVB`,-`MOVH`,-`MOVW`
+	// amd64:`MOVQ\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`,-`MOVW`,-`MOVL`
 	b[1], b[2], b[3], b[4], b[5], b[6], b[7], b[8] = byte(val), byte(val>>8), byte(val>>16), byte(val>>24), byte(val>>32), byte(val>>40), byte(val>>48), byte(val>>56)
 }
 
 func store_be_byte_2(b []byte, val uint16) {
 	_ = b[2]
 	// arm64:`REV16W`,`MOVH\sR[0-9]+,\s1\(R[0-9]+\)`,-`MOVB`
+	// amd64:`MOVW\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`
 	b[1], b[2] = byte(val>>8), byte(val)
 }
 
 func store_be_byte_4(b []byte, val uint32) {
 	_ = b[4]
 	// arm64:`REVW`,`MOVW\sR[0-9]+,\s1\(R[0-9]+\)`,-`MOVB`,-`MOVH`,-`REV16W`
+	// amd64:`MOVL\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`,-`MOVW`
 	b[1], b[2], b[3], b[4] = byte(val>>24), byte(val>>16), byte(val>>8), byte(val)
 }
 
 func store_be_byte_8(b []byte, val uint64) {
 	_ = b[8]
 	// arm64:`REV`,`MOVD\sR[0-9]+,\s1\(R[0-9]+\)`,-`MOVB`,-`MOVH`,-`MOVW`,-`REV16W`,-`REVW`
+	// amd64:`MOVQ\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`,-`MOVW`,-`MOVL`
 	b[1], b[2], b[3], b[4], b[5], b[6], b[7], b[8] = byte(val>>56), byte(val>>48), byte(val>>40), byte(val>>32), byte(val>>24), byte(val>>16), byte(val>>8), byte(val)
 }
 
@@ -513,14 +537,22 @@ func store_le_byte_4_idx4_inv(b []byte, idx int, val uint32) {
 func zero_byte_2(b1, b2 []byte) {
 	// bounds checks to guarantee safety of writes below
 	_, _ = b1[1], b2[1]
-	b1[0], b1[1] = 0, 0 // arm64:"MOVH\tZR",-"MOVB"
-	b2[1], b2[0] = 0, 0 // arm64:"MOVH\tZR",-"MOVB"
+	// arm64:"MOVH\tZR",-"MOVB"
+	// amd64:`MOVW\s[$]0,\s\([A-Z]+\)`
+	// 386:`MOVW\s[$]0,\s\([A-Z]+\)`
+	b1[0], b1[1] = 0, 0
+	// arm64:"MOVH\tZR",-"MOVB"
+	b2[1], b2[0] = 0, 0
 }
 
 func zero_byte_4(b1, b2 []byte) {
 	_, _ = b1[3], b2[3]
-	b1[0], b1[1], b1[2], b1[3] = 0, 0, 0, 0 // arm64:"MOVW\tZR",-"MOVB",-"MOVH"
-	b2[2], b2[3], b2[1], b2[0] = 0, 0, 0, 0 // arm64:"MOVW\tZR",-"MOVB",-"MOVH"
+	// arm64:"MOVW\tZR",-"MOVB",-"MOVH"
+	// amd64:`MOVL\s[$]0,\s\([A-Z]+\)`
+	// 386:`MOVL\s[$]0,\s\([A-Z]+\)`
+	b1[0], b1[1], b1[2], b1[3] = 0, 0, 0, 0
+	// arm64:"MOVW\tZR",-"MOVB",-"MOVH"
+	b2[2], b2[3], b2[1], b2[0] = 0, 0, 0, 0
 }
 
 func zero_byte_8(b []byte) {
@@ -559,14 +591,21 @@ func zero_byte_2_idx2(b []byte, idx int) {
 
 func zero_uint16_2(h1, h2 []uint16) {
 	_, _ = h1[1], h2[1]
-	h1[0], h1[1] = 0, 0 // arm64:"MOVW\tZR",-"MOVB",-"MOVH"
-	h2[1], h2[0] = 0, 0 // arm64:"MOVW\tZR",-"MOVB",-"MOVH"
+	// arm64:"MOVW\tZR",-"MOVB",-"MOVH"
+	// amd64:`MOVL\s[$]0,\s\([A-Z]+\)`
+	// 386:`MOVL\s[$]0,\s\([A-Z]+\)`
+	h1[0], h1[1] = 0, 0
+	// arm64:"MOVW\tZR",-"MOVB",-"MOVH"
+	h2[1], h2[0] = 0, 0
 }
 
 func zero_uint16_4(h1, h2 []uint16) {
 	_, _ = h1[3], h2[3]
-	h1[0], h1[1], h1[2], h1[3] = 0, 0, 0, 0 // arm64:"MOVD\tZR",-"MOVB",-"MOVH",-"MOVW"
-	h2[2], h2[3], h2[1], h2[0] = 0, 0, 0, 0 // arm64:"MOVD\tZR",-"MOVB",-"MOVH",-"MOVW"
+	// arm64:"MOVD\tZR",-"MOVB",-"MOVH",-"MOVW"
+	// amd64:`MOVQ\s[$]0,\s\([A-Z]+\)`
+	h1[0], h1[1], h1[2], h1[3] = 0, 0, 0, 0
+	// arm64:"MOVD\tZR",-"MOVB",-"MOVH",-"MOVW"
+	h2[2], h2[3], h2[1], h2[0] = 0, 0, 0, 0
 }
 
 func zero_uint16_8(h []uint16) {
@@ -577,8 +616,11 @@ func zero_uint16_8(h []uint16) {
 
 func zero_uint32_2(w1, w2 []uint32) {
 	_, _ = w1[1], w2[1]
-	w1[0], w1[1] = 0, 0 // arm64:"MOVD\tZR",-"MOVB",-"MOVH",-"MOVW"
-	w2[1], w2[0] = 0, 0 // arm64:"MOVD\tZR",-"MOVB",-"MOVH",-"MOVW"
+	// arm64:"MOVD\tZR",-"MOVB",-"MOVH",-"MOVW"
+	// amd64:`MOVQ\s[$]0,\s\([A-Z]+\)`
+	w1[0], w1[1] = 0, 0
+	// arm64:"MOVD\tZR",-"MOVB",-"MOVH",-"MOVW"
+	w2[1], w2[0] = 0, 0
 }
 
 func zero_uint32_4(w1, w2 []uint32) {

From e0a97a59286f00b511ecacd1f4011bac348ab60f Mon Sep 17 00:00:00 2001
From: Rob Pike 
Date: Thu, 18 Oct 2018 13:46:54 +1100
Subject: [PATCH 175/240] cmd/doc: make comments inside functions appear with
 -src

The old godoc didn't do this either, perhaps because it's a little
tricky, but it can be done using a special type from the go/printer
package. (Usually we just use go/format).

Fixes #28195.

Change-Id: Ic6d3df3953ba71128398ceaf9a133c798551b6b8
Reviewed-on: https://go-review.googlesource.com/c/143037
Reviewed-by: Robert Griesemer 
---
 src/cmd/doc/doc_test.go |  4 ++--
 src/cmd/doc/pkg.go      | 13 ++++++++++++-
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/cmd/doc/doc_test.go b/src/cmd/doc/doc_test.go
index ec3a50d87d..f8c52b1988 100644
--- a/src/cmd/doc/doc_test.go
+++ b/src/cmd/doc/doc_test.go
@@ -466,8 +466,8 @@ var tests = []test{
 		[]string{
 			`Comment about exported type`, // Include comment.
 			`type ExportedType struct`,    // Type definition.
-			`Comment before exported field.*\n.*ExportedField +int` +
-				`.*Comment on line with exported field`,
+			`Comment before exported field`,
+			`ExportedField.*Comment on line with exported field`,
 			`ExportedEmbeddedType.*Comment on line with exported embedded field`,
 			`unexportedType.*Comment on line with unexported embedded field`,
 			`func \(ExportedType\) ExportedMethod\(a int\) bool`,
diff --git a/src/cmd/doc/pkg.go b/src/cmd/doc/pkg.go
index 680f555f59..4b2479e75c 100644
--- a/src/cmd/doc/pkg.go
+++ b/src/cmd/doc/pkg.go
@@ -12,6 +12,7 @@ import (
 	"go/doc"
 	"go/format"
 	"go/parser"
+	"go/printer"
 	"go/token"
 	"io"
 	"log"
@@ -206,7 +207,17 @@ func (pkg *Package) newlines(n int) {
 // clears the stuff we don't want to print anyway. It's a bit of a magic trick.
 func (pkg *Package) emit(comment string, node ast.Node) {
 	if node != nil {
-		err := format.Node(&pkg.buf, pkg.fs, node)
+		var err error
+		if showSrc {
+			// Need an extra little dance to get internal comments to appear.
+			commentedNode := &printer.CommentedNode{
+				Node:     node,
+				Comments: pkg.file.Comments,
+			}
+			err = format.Node(&pkg.buf, pkg.fs, commentedNode)
+		} else {
+			err = format.Node(&pkg.buf, pkg.fs, node)
+		}
 		if err != nil {
 			log.Fatal(err)
 		}

From 8ccafb1ac732ab7994acb3c40786a0b943974554 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor 
Date: Mon, 11 Dec 2017 12:03:44 -0800
Subject: [PATCH 176/240] test: add fixedbugs/bug506 for gccgo

Building with gccgo failed with an undefined symbol error from an
unnecessary hash function.

Updates #19773

Change-Id: Ic78bf1b086ff5ee26d464089c0e14987d3fe8b02
Reviewed-on: https://go-review.googlesource.com/c/130956
Run-TryBot: Ian Lance Taylor 
TryBot-Result: Gobot Gobot 
Reviewed-by: Brad Fitzpatrick 
---
 test/fixedbugs/bug506.dir/a.go    | 16 ++++++++++++++++
 test/fixedbugs/bug506.dir/main.go | 20 ++++++++++++++++++++
 test/fixedbugs/bug506.go          | 10 ++++++++++
 3 files changed, 46 insertions(+)
 create mode 100644 test/fixedbugs/bug506.dir/a.go
 create mode 100644 test/fixedbugs/bug506.dir/main.go
 create mode 100644 test/fixedbugs/bug506.go

diff --git a/test/fixedbugs/bug506.dir/a.go b/test/fixedbugs/bug506.dir/a.go
new file mode 100644
index 0000000000..8e8a200581
--- /dev/null
+++ b/test/fixedbugs/bug506.dir/a.go
@@ -0,0 +1,16 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package a
+
+type internal struct {
+	f1 string
+	f2 float64
+}
+
+type S struct {
+	F struct {
+		I internal
+	}
+}
diff --git a/test/fixedbugs/bug506.dir/main.go b/test/fixedbugs/bug506.dir/main.go
new file mode 100644
index 0000000000..1b60e40d8d
--- /dev/null
+++ b/test/fixedbugs/bug506.dir/main.go
@@ -0,0 +1,20 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"fmt"
+
+	"./a"
+)
+
+var v = a.S{}
+
+func main() {
+	want := "{{ 0}}"
+	if got := fmt.Sprint(v.F); got != want {
+		panic(got)
+	}
+}
diff --git a/test/fixedbugs/bug506.go b/test/fixedbugs/bug506.go
new file mode 100644
index 0000000000..7c8ccc6ec7
--- /dev/null
+++ b/test/fixedbugs/bug506.go
@@ -0,0 +1,10 @@
+// rundir
+
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Gccgo caused an undefined symbol reference building hash functions
+// for an imported struct with unexported fields.
+
+package ignored

From 138bfc28090ccf03450cf02cb24f06b60f57cd3b Mon Sep 17 00:00:00 2001
From: Richard Musiol 
Date: Thu, 18 Oct 2018 15:53:38 +0200
Subject: [PATCH 177/240] syscall/js: make zero js.Value represent "undefined"

This commit changes the encoding of js.Value so that the zero js.Value
represents the JavaScript value "undefined". This is what users
intuitively expect.

Specifically, the encodings of "undefined" and the number zero have
been swapped.

Fixes #27592.

Change-Id: Icfc832c8cdf7a8a78bd69d20e00a04dbed0ccd10
Reviewed-on: https://go-review.googlesource.com/c/143137
Run-TryBot: Richard Musiol 
TryBot-Result: Gobot Gobot 
Reviewed-by: Brad Fitzpatrick 
---
 misc/wasm/wasm_exec.js    | 17 ++++++++++++-----
 src/syscall/js/js.go      | 21 ++++++++++++++++-----
 src/syscall/js/js_test.go | 14 ++++++++++++++
 3 files changed, 42 insertions(+), 10 deletions(-)

diff --git a/misc/wasm/wasm_exec.js b/misc/wasm/wasm_exec.js
index 815b3fbeff..bd9754e53a 100644
--- a/misc/wasm/wasm_exec.js
+++ b/misc/wasm/wasm_exec.js
@@ -95,6 +95,9 @@
 
 			const loadValue = (addr) => {
 				const f = mem().getFloat64(addr, true);
+				if (f === 0) {
+					return undefined;
+				}
 				if (!isNaN(f)) {
 					return f;
 				}
@@ -112,14 +115,18 @@
 						mem().setUint32(addr, 0, true);
 						return;
 					}
+					if (v === 0) {
+						mem().setUint32(addr + 4, nanHead, true);
+						mem().setUint32(addr, 1, true);
+						return;
+					}
 					mem().setFloat64(addr, v, true);
 					return;
 				}
 
 				switch (v) {
 					case undefined:
-						mem().setUint32(addr + 4, nanHead, true);
-						mem().setUint32(addr, 1, true);
+						mem().setFloat64(addr, 0, true);
 						return;
 					case null:
 						mem().setUint32(addr + 4, nanHead, true);
@@ -334,7 +341,7 @@
 			this._inst = instance;
 			this._values = [ // TODO: garbage collection
 				NaN,
-				undefined,
+				0,
 				null,
 				true,
 				false,
@@ -396,14 +403,14 @@
 		}
 
 		static _makeCallbackHelper(id, pendingCallbacks, go) {
-			return function() {
+			return function () {
 				pendingCallbacks.push({ id: id, args: arguments });
 				go._resolveCallbackPromise();
 			};
 		}
 
 		static _makeEventCallbackHelper(preventDefault, stopPropagation, stopImmediatePropagation, fn) {
-			return function(event) {
+			return function (event) {
 				if (preventDefault) {
 					event.preventDefault();
 				}
diff --git a/src/syscall/js/js.go b/src/syscall/js/js.go
index 336586ca2d..9d826c3886 100644
--- a/src/syscall/js/js.go
+++ b/src/syscall/js/js.go
@@ -16,15 +16,17 @@ import (
 )
 
 // ref is used to identify a JavaScript value, since the value itself can not be passed to WebAssembly.
-// A JavaScript number (64-bit float, except NaN) is represented by its IEEE 754 binary representation.
+//
+// The JavaScript value "undefined" is represented by the value 0.
+// A JavaScript number (64-bit float, except 0 and NaN) is represented by its IEEE 754 binary representation.
 // All other values are represented as an IEEE 754 binary representation of NaN with bits 0-31 used as
 // an ID and bits 32-33 used to differentiate between string, symbol, function and object.
 type ref uint64
 
-// nanHead are the upper 32 bits of a ref which are set if the value is not a JavaScript number or NaN itself.
+// nanHead are the upper 32 bits of a ref which are set if the value is not encoded as an IEEE 754 number (see above).
 const nanHead = 0x7FF80000
 
-// Value represents a JavaScript value.
+// Value represents a JavaScript value. The zero value is the JavaScript value "undefined".
 type Value struct {
 	ref ref
 }
@@ -38,6 +40,9 @@ func predefValue(id uint32) Value {
 }
 
 func floatValue(f float64) Value {
+	if f == 0 {
+		return valueZero
+	}
 	if f != f {
 		return valueNaN
 	}
@@ -56,8 +61,9 @@ func (e Error) Error() string {
 }
 
 var (
+	valueUndefined = Value{ref: 0}
 	valueNaN       = predefValue(0)
-	valueUndefined = predefValue(1)
+	valueZero      = predefValue(1)
 	valueNull      = predefValue(2)
 	valueTrue      = predefValue(3)
 	valueFalse     = predefValue(4)
@@ -318,13 +324,18 @@ func (v Value) New(args ...interface{}) Value {
 func valueNew(v ref, args []ref) (ref, bool)
 
 func (v Value) isNumber() bool {
-	return v.ref>>32&nanHead != nanHead || v.ref == valueNaN.ref
+	return v.ref == valueZero.ref ||
+		v.ref == valueNaN.ref ||
+		(v.ref != valueUndefined.ref && v.ref>>32&nanHead != nanHead)
 }
 
 func (v Value) float(method string) float64 {
 	if !v.isNumber() {
 		panic(&ValueError{method, v.Type()})
 	}
+	if v.ref == valueZero.ref {
+		return 0
+	}
 	return *(*float64)(unsafe.Pointer(&v.ref))
 }
 
diff --git a/src/syscall/js/js_test.go b/src/syscall/js/js_test.go
index 9cc931a31d..ed39fe3714 100644
--- a/src/syscall/js/js_test.go
+++ b/src/syscall/js/js_test.go
@@ -22,6 +22,7 @@ var dummys = js.Global().Call("eval", `({
 	add: function(a, b) {
 		return a + b;
 	},
+	zero: 0,
 	NaN: NaN,
 })`)
 
@@ -74,6 +75,9 @@ func TestInt(t *testing.T) {
 	if dummys.Get("someInt") != dummys.Get("someInt") {
 		t.Errorf("same value not equal")
 	}
+	if got := dummys.Get("zero").Int(); got != 0 {
+		t.Errorf("got %#v, want %#v", got, 0)
+	}
 }
 
 func TestIntConversion(t *testing.T) {
@@ -237,6 +241,9 @@ func TestType(t *testing.T) {
 	if got, want := js.ValueOf(true).Type(), js.TypeBoolean; got != want {
 		t.Errorf("got %s, want %s", got, want)
 	}
+	if got, want := js.ValueOf(0).Type(), js.TypeNumber; got != want {
+		t.Errorf("got %s, want %s", got, want)
+	}
 	if got, want := js.ValueOf(42).Type(), js.TypeNumber; got != want {
 		t.Errorf("got %s, want %s", got, want)
 	}
@@ -269,6 +276,13 @@ func TestValueOf(t *testing.T) {
 	}
 }
 
+func TestZeroValue(t *testing.T) {
+	var v js.Value
+	if v != js.Undefined() {
+		t.Error("zero js.Value is not js.Undefined()")
+	}
+}
+
 func TestCallback(t *testing.T) {
 	c := make(chan struct{})
 	cb := js.NewCallback(func(args []js.Value) {

From 0a8e3477519fe4a657f5a8fc212223a436a17f57 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor 
Date: Tue, 24 Jan 2017 13:22:21 -0800
Subject: [PATCH 178/240] test: update issue5089.go for recent gccgo changes
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

As of https://golang.org/cl/43456 gccgo now gives a better error
message for this test.

Before:
    fixedbugs/issue5089.go:13:1: error: redefinition of ‘bufio.Buffered’: receiver name changed
     func (b *bufio.Reader) Buffered() int { // ERROR "non-local|redefinition"
     ^
    fixedbugs/issue5089.go:11:13: note: previous definition of ‘bufio.Buffered’ was here
     import "bufio" // GCCGO_ERROR "previous"
                 ^

Now:
    fixedbugs/issue5089.go:13:7: error: may not define methods on non-local type
     func (b *bufio.Reader) Buffered() int { // ERROR "non-local|redefinition"
           ^

Change-Id: I4112ca8d91336f6369f780c1d45b8915b5e8e235
Reviewed-on: https://go-review.googlesource.com/c/130955
Run-TryBot: Ian Lance Taylor 
TryBot-Result: Gobot Gobot 
Reviewed-by: Brad Fitzpatrick 
---
 test/fixedbugs/issue5089.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/fixedbugs/issue5089.go b/test/fixedbugs/issue5089.go
index 9f7fa5a4d4..dc393e9b06 100644
--- a/test/fixedbugs/issue5089.go
+++ b/test/fixedbugs/issue5089.go
@@ -8,7 +8,7 @@
 
 package p
 
-import "bufio"	// GCCGO_ERROR "previous"
+import "bufio"
 
 func (b *bufio.Reader) Buffered() int { // ERROR "non-local|redefinition"
 	return -1

From fa31093ec4e9bbfce51c11c8ab90dd9b711d0052 Mon Sep 17 00:00:00 2001
From: David Chase 
Date: Thu, 11 Oct 2018 17:48:33 -0400
Subject: [PATCH 179/240] cmd/compile: attach slots to incoming params for
 better debugging

This change attaches a slots to the OpArg values for
incoming params, and this in turn causes location lists
to be generated for params, and that yields better
debugging, in delve and sometimes in gdb.

The parameter lifetimes could start earlier; they are in
fact defined on entry, not at the point where the OpArg is
finally mentioned.  (that will be addressed in another CL)

Change-Id: Icca891e118291d260c35a14acd5bc92bb82d9e9f
Reviewed-on: https://go-review.googlesource.com/c/141697
Run-TryBot: David Chase 
TryBot-Result: Gobot Gobot 
Reviewed-by: Keith Randall 
---
 src/cmd/compile/internal/gc/ssa.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go
index d3a30879db..3818aaf6b0 100644
--- a/src/cmd/compile/internal/gc/ssa.go
+++ b/src/cmd/compile/internal/gc/ssa.go
@@ -202,7 +202,9 @@ func buildssa(fn *Node, worker int) *ssa.Func {
 	// Populate SSAable arguments.
 	for _, n := range fn.Func.Dcl {
 		if n.Class() == PPARAM && s.canSSA(n) {
-			s.vars[n] = s.newValue0A(ssa.OpArg, n.Type, n)
+			v := s.newValue0A(ssa.OpArg, n.Type, n)
+			s.vars[n] = v
+			s.addNamedValue(n, v) // This helps with debugging information, not needed for compilation itself.
 		}
 	}
 

From 2d6a7593b5cde33546be7bb69f420d32df060a47 Mon Sep 17 00:00:00 2001
From: Robert Griesemer 
Date: Thu, 18 Oct 2018 12:37:25 -0700
Subject: [PATCH 180/240] cmd/doc: minor code simplification

Follow-up on https://golang.org/cl/143037.

Change-Id: Ia36760b499f7d46ce03e0fa81ec455a4a20208ac
Reviewed-on: https://go-review.googlesource.com/c/143061
Run-TryBot: Robert Griesemer 
TryBot-Result: Gobot Gobot 
Reviewed-by: Rob Pike 
---
 src/cmd/doc/pkg.go | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/src/cmd/doc/pkg.go b/src/cmd/doc/pkg.go
index 4b2479e75c..7c4e00767d 100644
--- a/src/cmd/doc/pkg.go
+++ b/src/cmd/doc/pkg.go
@@ -207,17 +207,15 @@ func (pkg *Package) newlines(n int) {
 // clears the stuff we don't want to print anyway. It's a bit of a magic trick.
 func (pkg *Package) emit(comment string, node ast.Node) {
 	if node != nil {
-		var err error
+		var arg interface{} = node
 		if showSrc {
 			// Need an extra little dance to get internal comments to appear.
-			commentedNode := &printer.CommentedNode{
+			arg = &printer.CommentedNode{
 				Node:     node,
 				Comments: pkg.file.Comments,
 			}
-			err = format.Node(&pkg.buf, pkg.fs, commentedNode)
-		} else {
-			err = format.Node(&pkg.buf, pkg.fs, node)
 		}
+		err := format.Node(&pkg.buf, pkg.fs, arg)
 		if err != nil {
 			log.Fatal(err)
 		}

From 0d898353989308cd50c3a1eb5d180dbba9fa4393 Mon Sep 17 00:00:00 2001
From: Keith Randall 
Date: Mon, 15 Oct 2018 13:40:00 -0700
Subject: [PATCH 181/240] cmd/compile: fix gdb stepping test, take 2

The fix in CL 141649 is not right, the line in question got moved,
not added. Not sure why the -u option didn't do the right thing
when preparing the diff.

Fixes #28198

Change-Id: I6d45fdbbd5a9487cc70da07ab84e090b689a57f5
Reviewed-on: https://go-review.googlesource.com/c/142298
Reviewed-by: Alberto Donizetti 
---
 src/cmd/compile/internal/ssa/testdata/hist.gdb-opt.nexts | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/src/cmd/compile/internal/ssa/testdata/hist.gdb-opt.nexts b/src/cmd/compile/internal/ssa/testdata/hist.gdb-opt.nexts
index b2f3216707..8664ea77c4 100644
--- a/src/cmd/compile/internal/ssa/testdata/hist.gdb-opt.nexts
+++ b/src/cmd/compile/internal/ssa/testdata/hist.gdb-opt.nexts
@@ -123,7 +123,6 @@ t = 0
 92:			fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t)
 91:			n += a
 90:			t += i * a
-92:			fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t)
 86:		for i, a := range hist {
 87:			if a == 0 { //gdb-opt=(a,n,t)
 a = 3
@@ -132,7 +131,6 @@ t = 3
 92:			fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t)
 91:			n += a
 90:			t += i * a
-92:			fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t)
 86:		for i, a := range hist {
 87:			if a == 0 { //gdb-opt=(a,n,t)
 a = 0
@@ -146,7 +144,6 @@ t = 9
 92:			fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t)
 91:			n += a
 90:			t += i * a
-92:			fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t)
 86:		for i, a := range hist {
 87:			if a == 0 { //gdb-opt=(a,n,t)
 a = 1
@@ -155,7 +152,6 @@ t = 17
 92:			fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t)
 91:			n += a
 90:			t += i * a
-92:			fmt.Fprintf(os.Stderr, "%d\t%d\t%d\t%d\t%d\n", i, a, n, i*a, t) //gdb-dbg=(n,i,t)
 86:		for i, a := range hist {
 87:			if a == 0 { //gdb-opt=(a,n,t)
 a = 0

From a440cc0d702e15c19bcc984f7a8f5c10f83726ab Mon Sep 17 00:00:00 2001
From: Rob Pike 
Date: Tue, 16 Oct 2018 13:54:39 +1100
Subject: [PATCH 182/240] fmt: print maps in key-sorted order

For easier testing, change the way maps are printed so they
appear in a consistent order between runs. Do this by printing
them in key-sorted order.

To do this, we add a package at the root, internal/fmtsort,
that implements a general mechanism for sorting map keys
regardless of their type. This is a little messy and probably
slow, but formatted printing of maps has never been fast and
is already always reflection-driven.

The rules are:

The ordering rules are more general than with Go's < operator:

 - when applicable, nil compares low
 - ints, floats, and strings order by <
 - NaN compares less than non-NaN floats
 - bool compares false before true
 - complex compares real, then imag
 - pointers compare by machine address
 - channel values compare by machine address
 - structs compare each field in turn
 - arrays compare each element in turn.
 - interface values compare first by reflect.Type describing the concrete type
   and then by concrete value as described in the previous rules.

The new package is internal because we really do not want
everyone using this to sort things. It is slow, not general, and
only suitable for the subset of types that can be map keys.

Also use the package in text/template, which already had a
weaker version of this mechanism.

This change requires adding a dependency on sort to the fmt
package, but that isn't disruptive to the dependency tree.

Fixes #21095

Change-Id: Ia602115c7de5d95993dbd609611d8bd96e054157
Reviewed-on: https://go-review.googlesource.com/c/142737
Reviewed-by: Brad Fitzpatrick 
Reviewed-by: Russ Cox 
---
 src/fmt/print.go                    |   9 +-
 src/go/build/deps_test.go           |   6 +-
 src/internal/fmtsort/export_test.go |  11 ++
 src/internal/fmtsort/sort.go        | 216 ++++++++++++++++++++++++++++
 src/internal/fmtsort/sort_test.go   | 212 +++++++++++++++++++++++++++
 src/text/template/exec.go           |   6 +-
 6 files changed, 452 insertions(+), 8 deletions(-)
 create mode 100644 src/internal/fmtsort/export_test.go
 create mode 100644 src/internal/fmtsort/sort.go
 create mode 100644 src/internal/fmtsort/sort_test.go

diff --git a/src/fmt/print.go b/src/fmt/print.go
index 32743d0712..22dc52ccdc 100644
--- a/src/fmt/print.go
+++ b/src/fmt/print.go
@@ -6,6 +6,7 @@ package fmt
 
 import (
 	"errors"
+	"internal/fmtsort"
 	"io"
 	"os"
 	"reflect"
@@ -753,8 +754,8 @@ func (p *pp) printValue(value reflect.Value, verb rune, depth int) {
 		} else {
 			p.buf.WriteString(mapString)
 		}
-		iter := f.MapRange()
-		for i := 0; iter.Next(); i++ {
+		sorted := fmtsort.Sort(f)
+		for i, key := range sorted.Key {
 			if i > 0 {
 				if p.fmt.sharpV {
 					p.buf.WriteString(commaSpaceString)
@@ -762,9 +763,9 @@ func (p *pp) printValue(value reflect.Value, verb rune, depth int) {
 					p.buf.WriteByte(' ')
 				}
 			}
-			p.printValue(iter.Key(), verb, depth+1)
+			p.printValue(key, verb, depth+1)
 			p.buf.WriteByte(':')
-			p.printValue(iter.Value(), verb, depth+1)
+			p.printValue(sorted.Value[i], verb, depth+1)
 		}
 		if p.fmt.sharpV {
 			p.buf.WriteByte('}')
diff --git a/src/go/build/deps_test.go b/src/go/build/deps_test.go
index 904759fe3b..7b3f25ffff 100644
--- a/src/go/build/deps_test.go
+++ b/src/go/build/deps_test.go
@@ -115,6 +115,7 @@ var pkgDeps = map[string][]string{
 	"image":                  {"L2", "image/color"}, // interfaces
 	"image/color":            {"L2"},                // interfaces
 	"image/color/palette":    {"L2", "image/color"},
+	"internal/fmtsort":       {"reflect", "sort"},
 	"reflect":                {"L2"},
 	"sort":                   {"reflect"},
 
@@ -135,6 +136,7 @@ var pkgDeps = map[string][]string{
 		"image",
 		"image/color",
 		"image/color/palette",
+		"internal/fmtsort",
 		"reflect",
 	},
 
@@ -177,8 +179,8 @@ var pkgDeps = map[string][]string{
 		"time",
 	},
 
-	// Formatted I/O: few dependencies (L1) but we must add reflect.
-	"fmt": {"L1", "os", "reflect"},
+	// Formatted I/O: few dependencies (L1) but we must add reflect and internal/fmtsort.
+	"fmt": {"L1", "os", "reflect", "internal/fmtsort"},
 	"log": {"L1", "os", "fmt", "time"},
 
 	// Packages used by testing must be low-level (L2+fmt).
diff --git a/src/internal/fmtsort/export_test.go b/src/internal/fmtsort/export_test.go
new file mode 100644
index 0000000000..25cbb5d4fc
--- /dev/null
+++ b/src/internal/fmtsort/export_test.go
@@ -0,0 +1,11 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package fmtsort
+
+import "reflect"
+
+func Compare(a, b reflect.Value) int {
+	return compare(a, b)
+}
diff --git a/src/internal/fmtsort/sort.go b/src/internal/fmtsort/sort.go
new file mode 100644
index 0000000000..c959cbee1f
--- /dev/null
+++ b/src/internal/fmtsort/sort.go
@@ -0,0 +1,216 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package fmtsort provides a general stable ordering mechanism
+// for maps, on behalf of the fmt and text/template packages.
+// It is not guaranteed to be efficient and works only for types
+// that are valid map keys.
+package fmtsort
+
+import (
+	"reflect"
+	"sort"
+)
+
+// Note: Throughout this package we avoid calling reflect.Value.Interface as
+// it is not always legal to do so and it's easier to avoid the issue than to face it.
+
+// SortedMap represents a map's keys and values. The keys and values are
+// aligned in index order: Value[i] is the value in the map corresponding to Key[i].
+type SortedMap struct {
+	Key   []reflect.Value
+	Value []reflect.Value
+}
+
+func (o *SortedMap) Len() int           { return len(o.Key) }
+func (o *SortedMap) Less(i, j int) bool { return compare(o.Key[i], o.Key[j]) < 0 }
+func (o *SortedMap) Swap(i, j int) {
+	o.Key[i], o.Key[j] = o.Key[j], o.Key[i]
+	o.Value[i], o.Value[j] = o.Value[j], o.Value[i]
+}
+
+// Sort accepts a map and returns a SortedMap that has the same keys and
+// values but in a stable sorted order according to the keys, modulo issues
+// raised by unorderable key values such as NaNs.
+//
+// The ordering rules are more general than with Go's < operator:
+//
+//  - when applicable, nil compares low
+//  - ints, floats, and strings order by <
+//  - NaN compares less than non-NaN floats
+//  - bool compares false before true
+//  - complex compares real, then imag
+//  - pointers compare by machine address
+//  - channel values compare by machine address
+//  - structs compare each field in turn
+//  - arrays compare each element in turn.
+//    Otherwise identical arrays compare by length.
+//  - interface values compare first by reflect.Type describing the concrete type
+//    and then by concrete value as described in the previous rules.
+//
+func Sort(mapValue reflect.Value) *SortedMap {
+	if mapValue.Type().Kind() != reflect.Map {
+		return nil
+	}
+	key := make([]reflect.Value, mapValue.Len())
+	value := make([]reflect.Value, len(key))
+	iter := mapValue.MapRange()
+	for i := 0; iter.Next(); i++ {
+		key[i] = iter.Key()
+		value[i] = iter.Value()
+	}
+	sorted := &SortedMap{
+		Key:   key,
+		Value: value,
+	}
+	sort.Stable(sorted)
+	return sorted
+}
+
+// compare compares two values of the same type. It returns -1, 0, 1
+// according to whether a > b (1), a == b (0), or a < b (-1).
+// If the types differ, it returns -1.
+// See the comment on Sort for the comparison rules.
+func compare(aVal, bVal reflect.Value) int {
+	aType, bType := aVal.Type(), bVal.Type()
+	if aType != bType {
+		return -1 // No good answer possible, but don't return 0: they're not equal.
+	}
+	switch aVal.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		a, b := aVal.Int(), bVal.Int()
+		switch {
+		case a < b:
+			return -1
+		case a > b:
+			return 1
+		default:
+			return 0
+		}
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		a, b := aVal.Uint(), bVal.Uint()
+		switch {
+		case a < b:
+			return -1
+		case a > b:
+			return 1
+		default:
+			return 0
+		}
+	case reflect.String:
+		a, b := aVal.String(), bVal.String()
+		switch {
+		case a < b:
+			return -1
+		case a > b:
+			return 1
+		default:
+			return 0
+		}
+	case reflect.Float32, reflect.Float64:
+		return floatCompare(aVal.Float(), bVal.Float())
+	case reflect.Complex64, reflect.Complex128:
+		a, b := aVal.Complex(), bVal.Complex()
+		if c := floatCompare(real(a), real(b)); c != 0 {
+			return c
+		}
+		return floatCompare(imag(a), imag(b))
+	case reflect.Bool:
+		a, b := aVal.Bool(), bVal.Bool()
+		switch {
+		case a == b:
+			return 0
+		case a:
+			return 1
+		default:
+			return -1
+		}
+	case reflect.Ptr:
+		a, b := aVal.Pointer(), bVal.Pointer()
+		switch {
+		case a < b:
+			return -1
+		case a > b:
+			return 1
+		default:
+			return 0
+		}
+	case reflect.Chan:
+		if c, ok := nilCompare(aVal, bVal); ok {
+			return c
+		}
+		ap, bp := aVal.Pointer(), bVal.Pointer()
+		switch {
+		case ap < bp:
+			return -1
+		case ap > bp:
+			return 1
+		default:
+			return 0
+		}
+	case reflect.Struct:
+		for i := 0; i < aVal.NumField(); i++ {
+			if c := compare(aVal.Field(i), bVal.Field(i)); c != 0 {
+				return c
+			}
+		}
+		return 0
+	case reflect.Array:
+		for i := 0; i < aVal.Len(); i++ {
+			if c := compare(aVal.Index(i), bVal.Index(i)); c != 0 {
+				return c
+			}
+		}
+		return 0
+	case reflect.Interface:
+		if c, ok := nilCompare(aVal, bVal); ok {
+			return c
+		}
+		c := compare(reflect.ValueOf(aType), reflect.ValueOf(bType))
+		if c != 0 {
+			return c
+		}
+		return compare(aVal.Elem(), bVal.Elem())
+	default:
+		// Certain types cannot appear as keys (maps, funcs, slices), but be explicit.
+		panic("bad type in compare: " + aType.String())
+	}
+}
+
+// nilCompare checks whether either value is nil. If not, the boolean is false.
+// If either value is nil, the boolean is true and the integer is the comparison
+// value. The comparison is defined to be 0 if both are nil, otherwise the one
+// nil value compares low. Both arguments must represent a chan, func,
+// interface, map, pointer, or slice.
+func nilCompare(aVal, bVal reflect.Value) (int, bool) {
+	if aVal.IsNil() {
+		if bVal.IsNil() {
+			return 0, true
+		}
+		return -1, true
+	}
+	if bVal.IsNil() {
+		return 1, true
+	}
+	return 0, false
+}
+
+// floatCompare compares two floating-point values. NaNs compare low.
+func floatCompare(a, b float64) int {
+	switch {
+	case isNaN(a):
+		return -1 // No good answer if b is a NaN so don't bother checking.
+	case isNaN(b):
+		return 1
+	case a < b:
+		return -1
+	case a > b:
+		return 1
+	}
+	return 0
+}
+
+func isNaN(a float64) bool {
+	return a != a
+}
diff --git a/src/internal/fmtsort/sort_test.go b/src/internal/fmtsort/sort_test.go
new file mode 100644
index 0000000000..6b10c775b0
--- /dev/null
+++ b/src/internal/fmtsort/sort_test.go
@@ -0,0 +1,212 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package fmtsort_test
+
+import (
+	"fmt"
+	"internal/fmtsort"
+	"math"
+	"reflect"
+	"strings"
+	"testing"
+)
+
+var compareTests = [][]reflect.Value{
+	ct(reflect.TypeOf(int(0)), -1, 0, 1),
+	ct(reflect.TypeOf(int8(0)), -1, 0, 1),
+	ct(reflect.TypeOf(int16(0)), -1, 0, 1),
+	ct(reflect.TypeOf(int32(0)), -1, 0, 1),
+	ct(reflect.TypeOf(int64(0)), -1, 0, 1),
+	ct(reflect.TypeOf(uint(0)), 0, 1, 5),
+	ct(reflect.TypeOf(uint8(0)), 0, 1, 5),
+	ct(reflect.TypeOf(uint16(0)), 0, 1, 5),
+	ct(reflect.TypeOf(uint32(0)), 0, 1, 5),
+	ct(reflect.TypeOf(uint64(0)), 0, 1, 5),
+	ct(reflect.TypeOf(uintptr(0)), 0, 1, 5),
+	ct(reflect.TypeOf(string("")), "", "a", "ab"),
+	ct(reflect.TypeOf(float32(0)), math.NaN(), math.Inf(-1), -1e10, 0, 1e10, math.Inf(1)),
+	ct(reflect.TypeOf(float64(0)), math.NaN(), math.Inf(-1), -1e10, 0, 1e10, math.Inf(1)),
+	ct(reflect.TypeOf(complex64(0+1i)), -1-1i, -1+0i, -1+1i, 0-1i, 0+0i, 0+1i, 1-1i, 1+0i, 1+1i),
+	ct(reflect.TypeOf(complex128(0+1i)), -1-1i, -1+0i, -1+1i, 0-1i, 0+0i, 0+1i, 1-1i, 1+0i, 1+1i),
+	ct(reflect.TypeOf(false), false, true),
+	ct(reflect.TypeOf(&ints[0]), &ints[0], &ints[1], &ints[2]),
+	ct(reflect.TypeOf(chans[0]), chans[0], chans[1], chans[2]),
+	ct(reflect.TypeOf(toy{}), toy{0, 1}, toy{0, 2}, toy{1, -1}, toy{1, 1}),
+	ct(reflect.TypeOf([2]int{}), [2]int{1, 1}, [2]int{1, 2}, [2]int{2, 0}),
+	ct(reflect.TypeOf(interface{}(interface{}(0))), iFace, 1, 2, 3),
+}
+
+var iFace interface{}
+
+func ct(typ reflect.Type, args ...interface{}) []reflect.Value {
+	value := make([]reflect.Value, len(args))
+	for i, v := range args {
+		x := reflect.ValueOf(v)
+		if !x.IsValid() { // Make it a typed nil.
+			x = reflect.Zero(typ)
+		} else {
+			x = x.Convert(typ)
+		}
+		value[i] = x
+	}
+	return value
+}
+
+func TestCompare(t *testing.T) {
+	for _, test := range compareTests {
+		for i, v0 := range test {
+			for j, v1 := range test {
+				c := fmtsort.Compare(v0, v1)
+				var expect int
+				switch {
+				case i == j:
+					expect = 0
+					// NaNs are tricky.
+					if typ := v0.Type(); (typ.Kind() == reflect.Float32 || typ.Kind() == reflect.Float64) && math.IsNaN(v0.Float()) {
+						expect = -1
+					}
+				case i < j:
+					expect = -1
+				case i > j:
+					expect = 1
+				}
+				if c != expect {
+					t.Errorf("%s: compare(%v,%v)=%d; expect %d", v0.Type(), v0, v1, c, expect)
+				}
+			}
+		}
+	}
+}
+
+type sortTest struct {
+	data  interface{} // Always a map.
+	print string      // Printed result using our custom printer.
+}
+
+var sortTests = []sortTest{
+	{
+		map[int]string{7: "bar", -3: "foo"},
+		"-3:foo 7:bar",
+	},
+	{
+		map[uint8]string{7: "bar", 3: "foo"},
+		"3:foo 7:bar",
+	},
+	{
+		map[string]string{"7": "bar", "3": "foo"},
+		"3:foo 7:bar",
+	},
+	{
+		map[float64]string{7: "bar", -3: "foo", math.NaN(): "nan", math.Inf(0): "inf"},
+		"NaN:nan -3:foo 7:bar +Inf:inf",
+	},
+	{
+		map[complex128]string{7 + 2i: "bar2", 7 + 1i: "bar", -3: "foo", complex(math.NaN(), 0i): "nan", complex(math.Inf(0), 0i): "inf"},
+		"(NaN+0i):nan (-3+0i):foo (7+1i):bar (7+2i):bar2 (+Inf+0i):inf",
+	},
+	{
+		map[bool]string{true: "true", false: "false"},
+		"false:false true:true",
+	},
+	{
+		chanMap(),
+		"CHAN0:0 CHAN1:1 CHAN2:2",
+	},
+	{
+		pointerMap(),
+		"PTR0:0 PTR1:1 PTR2:2",
+	},
+	{
+		map[toy]string{toy{7, 2}: "72", toy{7, 1}: "71", toy{3, 4}: "34"},
+		"{3 4}:34 {7 1}:71 {7 2}:72",
+	},
+	{
+		map[[2]int]string{{7, 2}: "72", {7, 1}: "71", {3, 4}: "34"},
+		"[3 4]:34 [7 1]:71 [7 2]:72",
+	},
+	{
+		map[interface{}]string{7: "7", 4: "4", 3: "3", nil: "nil"},
+		":nil 3:3 4:4 7:7",
+	},
+}
+
+func sprint(data interface{}) string {
+	om := fmtsort.Sort(reflect.ValueOf(data))
+	if om == nil {
+		return "nil"
+	}
+	b := new(strings.Builder)
+	for i, key := range om.Key {
+		if i > 0 {
+			b.WriteRune(' ')
+		}
+		b.WriteString(sprintKey(key))
+		b.WriteRune(':')
+		b.WriteString(fmt.Sprint(om.Value[i]))
+	}
+	return b.String()
+}
+
+// sprintKey formats a reflect.Value but gives reproducible values for some
+// problematic types such as pointers. Note that it only does special handling
+// for the troublesome types used in the test cases; it is not a general
+// printer.
+func sprintKey(key reflect.Value) string {
+	switch str := key.Type().String(); str {
+	case "*int":
+		ptr := key.Interface().(*int)
+		for i := range ints {
+			if ptr == &ints[i] {
+				return fmt.Sprintf("PTR%d", i)
+			}
+		}
+		return "PTR???"
+	case "chan int":
+		c := key.Interface().(chan int)
+		for i := range chans {
+			if c == chans[i] {
+				return fmt.Sprintf("CHAN%d", i)
+			}
+		}
+		return "CHAN???"
+	default:
+		return fmt.Sprint(key)
+	}
+}
+
+var (
+	ints  [3]int
+	chans = [3]chan int{make(chan int), make(chan int), make(chan int)}
+)
+
+func pointerMap() map[*int]string {
+	m := make(map[*int]string)
+	for i := 2; i >= 0; i-- {
+		m[&ints[i]] = fmt.Sprint(i)
+	}
+	return m
+}
+
+func chanMap() map[chan int]string {
+	m := make(map[chan int]string)
+	for i := 2; i >= 0; i-- {
+		m[chans[i]] = fmt.Sprint(i)
+	}
+	return m
+}
+
+type toy struct {
+	A int // Exported.
+	b int // Unexported.
+}
+
+func TestOrder(t *testing.T) {
+	for _, test := range sortTests {
+		got := sprint(test.data)
+		if got != test.print {
+			t.Errorf("%s: got %q, want %q", reflect.TypeOf(test.data), got, test.print)
+		}
+	}
+}
diff --git a/src/text/template/exec.go b/src/text/template/exec.go
index 1d04c2982f..120d010a19 100644
--- a/src/text/template/exec.go
+++ b/src/text/template/exec.go
@@ -7,6 +7,7 @@ package template
 import (
 	"bytes"
 	"fmt"
+	"internal/fmtsort"
 	"io"
 	"reflect"
 	"runtime"
@@ -362,8 +363,9 @@ func (s *state) walkRange(dot reflect.Value, r *parse.RangeNode) {
 		if val.Len() == 0 {
 			break
 		}
-		for _, key := range sortKeys(val.MapKeys()) {
-			oneIteration(key, val.MapIndex(key))
+		om := fmtsort.Sort(val)
+		for i, key := range om.Key {
+			oneIteration(key, om.Value[i])
 		}
 		return
 	case reflect.Chan:

From 2d58fbac2f4c5c77b219e4d94b89c218ffa6f98f Mon Sep 17 00:00:00 2001
From: Matthew Dempsky 
Date: Thu, 18 Oct 2018 15:24:50 -0700
Subject: [PATCH 183/240] cmd/compile: extract gc.eqtype as types.Identical

For symmetry with go/types.Identical.

Passes toolstash-check.

Change-Id: Id19c3956e44ed8e2d9f203d15824322cc5842d3d
Reviewed-on: https://go-review.googlesource.com/c/143180
Run-TryBot: Matthew Dempsky 
TryBot-Result: Gobot Gobot 
Reviewed-by: Robert Griesemer 
---
 src/cmd/compile/internal/gc/closure.go     |   4 +-
 src/cmd/compile/internal/gc/const.go       |   2 +-
 src/cmd/compile/internal/gc/dcl.go         |   2 +-
 src/cmd/compile/internal/gc/esc.go         |   2 +-
 src/cmd/compile/internal/gc/export.go      |   2 +-
 src/cmd/compile/internal/gc/order.go       |   2 +-
 src/cmd/compile/internal/gc/reflect.go     |   4 +-
 src/cmd/compile/internal/gc/sinit.go       |   6 +-
 src/cmd/compile/internal/gc/subr.go        | 131 ++-------------------
 src/cmd/compile/internal/gc/swt.go         |   2 +-
 src/cmd/compile/internal/gc/typecheck.go   |  28 ++---
 src/cmd/compile/internal/gc/walk.go        |  12 +-
 src/cmd/compile/internal/types/identity.go | 119 +++++++++++++++++++
 13 files changed, 161 insertions(+), 155 deletions(-)
 create mode 100644 src/cmd/compile/internal/types/identity.go

diff --git a/src/cmd/compile/internal/gc/closure.go b/src/cmd/compile/internal/gc/closure.go
index dcea567a14..0736c5be4f 100644
--- a/src/cmd/compile/internal/gc/closure.go
+++ b/src/cmd/compile/internal/gc/closure.go
@@ -397,7 +397,7 @@ func walkclosure(clo *Node, init *Nodes) *Node {
 
 	// non-escaping temp to use, if any.
 	if x := prealloc[clo]; x != nil {
-		if !eqtype(typ, x.Type) {
+		if !types.Identical(typ, x.Type) {
 			panic("closure type does not match order's assigned type")
 		}
 		clos.Left.Right = x
@@ -530,7 +530,7 @@ func walkpartialcall(n *Node, init *Nodes) *Node {
 
 	// non-escaping temp to use, if any.
 	if x := prealloc[n]; x != nil {
-		if !eqtype(typ, x.Type) {
+		if !types.Identical(typ, x.Type) {
 			panic("partial call type does not match order's assigned type")
 		}
 		clos.Left.Right = x
diff --git a/src/cmd/compile/internal/gc/const.go b/src/cmd/compile/internal/gc/const.go
index 3c542aafae..a77759832a 100644
--- a/src/cmd/compile/internal/gc/const.go
+++ b/src/cmd/compile/internal/gc/const.go
@@ -311,7 +311,7 @@ func convlit1(n *Node, t *types.Type, explicit bool, reuse canReuseNode) *Node {
 	}
 
 	// avoid repeated calculations, errors
-	if eqtype(n.Type, t) {
+	if types.Identical(n.Type, t) {
 		return n
 	}
 
diff --git a/src/cmd/compile/internal/gc/dcl.go b/src/cmd/compile/internal/gc/dcl.go
index 736ea0a018..516c33d0bb 100644
--- a/src/cmd/compile/internal/gc/dcl.go
+++ b/src/cmd/compile/internal/gc/dcl.go
@@ -929,7 +929,7 @@ func addmethod(msym *types.Sym, t *types.Type, local, nointerface bool) *types.F
 		}
 		// eqtype only checks that incoming and result parameters match,
 		// so explicitly check that the receiver parameters match too.
-		if !eqtype(t, f.Type) || !eqtype(t.Recv().Type, f.Type.Recv().Type) {
+		if !types.Identical(t, f.Type) || !types.Identical(t.Recv().Type, f.Type.Recv().Type) {
 			yyerror("method redeclared: %v.%v\n\t%v\n\t%v", mt, msym, f.Type, t)
 		}
 		return f
diff --git a/src/cmd/compile/internal/gc/esc.go b/src/cmd/compile/internal/gc/esc.go
index 5beb43d548..ad43b3caec 100644
--- a/src/cmd/compile/internal/gc/esc.go
+++ b/src/cmd/compile/internal/gc/esc.go
@@ -872,7 +872,7 @@ opSwitch:
 			// it is also a dereference, because it is implicitly
 			// dereferenced (see #12588)
 			if n.Type.IsArray() &&
-				!(n.Right.Type.IsPtr() && eqtype(n.Right.Type.Elem(), n.Type)) {
+				!(n.Right.Type.IsPtr() && types.Identical(n.Right.Type.Elem(), n.Type)) {
 				e.escassignWhyWhere(n.List.Second(), n.Right, "range", n)
 			} else {
 				e.escassignDereference(n.List.Second(), n.Right, e.stepAssignWhere(n.List.Second(), n.Right, "range-deref", n))
diff --git a/src/cmd/compile/internal/gc/export.go b/src/cmd/compile/internal/gc/export.go
index 6ee660988a..85916509cb 100644
--- a/src/cmd/compile/internal/gc/export.go
+++ b/src/cmd/compile/internal/gc/export.go
@@ -131,7 +131,7 @@ func importtype(ipkg *types.Pkg, pos src.XPos, s *types.Sym) *types.Type {
 func importobj(ipkg *types.Pkg, pos src.XPos, s *types.Sym, op Op, ctxt Class, t *types.Type) *Node {
 	n := importsym(ipkg, s, op)
 	if n.Op != ONONAME {
-		if n.Op == op && (n.Class() != ctxt || !eqtype(n.Type, t)) {
+		if n.Op == op && (n.Class() != ctxt || !types.Identical(n.Type, t)) {
 			redeclare(lineno, s, fmt.Sprintf("during import %q", ipkg.Path))
 		}
 		return nil
diff --git a/src/cmd/compile/internal/gc/order.go b/src/cmd/compile/internal/gc/order.go
index e603a39b2a..3d0fa6ceb2 100644
--- a/src/cmd/compile/internal/gc/order.go
+++ b/src/cmd/compile/internal/gc/order.go
@@ -68,7 +68,7 @@ func (o *Order) newTemp(t *types.Type, clear bool) *Node {
 	key := t.LongString()
 	a := o.free[key]
 	for i, n := range a {
-		if eqtype(t, n.Type) {
+		if types.Identical(t, n.Type) {
 			v = a[i]
 			a[i] = a[len(a)-1]
 			a = a[:len(a)-1]
diff --git a/src/cmd/compile/internal/gc/reflect.go b/src/cmd/compile/internal/gc/reflect.go
index 3ef5682301..2dd81e30f5 100644
--- a/src/cmd/compile/internal/gc/reflect.go
+++ b/src/cmd/compile/internal/gc/reflect.go
@@ -405,7 +405,7 @@ func methods(t *types.Type) []*Sig {
 
 		if !sig.isym.Siggen() {
 			sig.isym.SetSiggen(true)
-			if !eqtype(this, it) {
+			if !types.Identical(this, it) {
 				compiling_wrappers = true
 				genwrapper(it, f, sig.isym)
 				compiling_wrappers = false
@@ -414,7 +414,7 @@ func methods(t *types.Type) []*Sig {
 
 		if !sig.tsym.Siggen() {
 			sig.tsym.SetSiggen(true)
-			if !eqtype(this, t) {
+			if !types.Identical(this, t) {
 				compiling_wrappers = true
 				genwrapper(t, f, sig.tsym)
 				compiling_wrappers = false
diff --git a/src/cmd/compile/internal/gc/sinit.go b/src/cmd/compile/internal/gc/sinit.go
index f24da70625..ac8dbf6017 100644
--- a/src/cmd/compile/internal/gc/sinit.go
+++ b/src/cmd/compile/internal/gc/sinit.go
@@ -288,7 +288,7 @@ func staticcopy(l *Node, r *Node, out *[]*Node) bool {
 	orig := r
 	r = r.Name.Defn.Right
 
-	for r.Op == OCONVNOP && !eqtype(r.Type, l.Type) {
+	for r.Op == OCONVNOP && !types.Identical(r.Type, l.Type) {
 		r = r.Left
 	}
 
@@ -833,7 +833,7 @@ func slicelit(ctxt initContext, n *Node, var_ *Node, init *Nodes) {
 	var a *Node
 	if x := prealloc[n]; x != nil {
 		// temp allocated during order.go for dddarg
-		if !eqtype(t, x.Type) {
+		if !types.Identical(t, x.Type) {
 			panic("dotdotdot base type does not match order's assigned type")
 		}
 
@@ -1154,7 +1154,7 @@ func oaslit(n *Node, init *Nodes) bool {
 		// not a special composite literal assignment
 		return false
 	}
-	if !eqtype(n.Left.Type, n.Right.Type) {
+	if !types.Identical(n.Left.Type, n.Right.Type) {
 		// not a special composite literal assignment
 		return false
 	}
diff --git a/src/cmd/compile/internal/gc/subr.go b/src/cmd/compile/internal/gc/subr.go
index fcfc7ac2de..8e643e6690 100644
--- a/src/cmd/compile/internal/gc/subr.go
+++ b/src/cmd/compile/internal/gc/subr.go
@@ -529,119 +529,6 @@ func methtype(t *types.Type) *types.Type {
 	return nil
 }
 
-// eqtype reports whether t1 and t2 are identical, following the spec rules.
-//
-// Any cyclic type must go through a named type, and if one is
-// named, it is only identical to the other if they are the same
-// pointer (t1 == t2), so there's no chance of chasing cycles
-// ad infinitum, so no need for a depth counter.
-func eqtype(t1, t2 *types.Type) bool {
-	return eqtype1(t1, t2, true, nil)
-}
-
-// eqtypeIgnoreTags is like eqtype but it ignores struct tags for struct identity.
-func eqtypeIgnoreTags(t1, t2 *types.Type) bool {
-	return eqtype1(t1, t2, false, nil)
-}
-
-type typePair struct {
-	t1 *types.Type
-	t2 *types.Type
-}
-
-func eqtype1(t1, t2 *types.Type, cmpTags bool, assumedEqual map[typePair]struct{}) bool {
-	if t1 == t2 {
-		return true
-	}
-	if t1 == nil || t2 == nil || t1.Etype != t2.Etype || t1.Broke() || t2.Broke() {
-		return false
-	}
-	if t1.Sym != nil || t2.Sym != nil {
-		// Special case: we keep byte/uint8 and rune/int32
-		// separate for error messages. Treat them as equal.
-		switch t1.Etype {
-		case TUINT8:
-			return (t1 == types.Types[TUINT8] || t1 == types.Bytetype) && (t2 == types.Types[TUINT8] || t2 == types.Bytetype)
-		case TINT32:
-			return (t1 == types.Types[TINT32] || t1 == types.Runetype) && (t2 == types.Types[TINT32] || t2 == types.Runetype)
-		default:
-			return false
-		}
-	}
-
-	if assumedEqual == nil {
-		assumedEqual = make(map[typePair]struct{})
-	} else if _, ok := assumedEqual[typePair{t1, t2}]; ok {
-		return true
-	}
-	assumedEqual[typePair{t1, t2}] = struct{}{}
-
-	switch t1.Etype {
-	case TINTER:
-		if t1.NumFields() != t2.NumFields() {
-			return false
-		}
-		for i, f1 := range t1.FieldSlice() {
-			f2 := t2.Field(i)
-			if f1.Sym != f2.Sym || !eqtype1(f1.Type, f2.Type, cmpTags, assumedEqual) {
-				return false
-			}
-		}
-		return true
-
-	case TSTRUCT:
-		if t1.NumFields() != t2.NumFields() {
-			return false
-		}
-		for i, f1 := range t1.FieldSlice() {
-			f2 := t2.Field(i)
-			if f1.Sym != f2.Sym || f1.Embedded != f2.Embedded || !eqtype1(f1.Type, f2.Type, cmpTags, assumedEqual) {
-				return false
-			}
-			if cmpTags && f1.Note != f2.Note {
-				return false
-			}
-		}
-		return true
-
-	case TFUNC:
-		// Check parameters and result parameters for type equality.
-		// We intentionally ignore receiver parameters for type
-		// equality, because they're never relevant.
-		for _, f := range types.ParamsResults {
-			// Loop over fields in structs, ignoring argument names.
-			fs1, fs2 := f(t1).FieldSlice(), f(t2).FieldSlice()
-			if len(fs1) != len(fs2) {
-				return false
-			}
-			for i, f1 := range fs1 {
-				f2 := fs2[i]
-				if f1.Isddd() != f2.Isddd() || !eqtype1(f1.Type, f2.Type, cmpTags, assumedEqual) {
-					return false
-				}
-			}
-		}
-		return true
-
-	case TARRAY:
-		if t1.NumElem() != t2.NumElem() {
-			return false
-		}
-
-	case TCHAN:
-		if t1.ChanDir() != t2.ChanDir() {
-			return false
-		}
-
-	case TMAP:
-		if !eqtype1(t1.Key(), t2.Key(), cmpTags, assumedEqual) {
-			return false
-		}
-	}
-
-	return eqtype1(t1.Elem(), t2.Elem(), cmpTags, assumedEqual)
-}
-
 // Are t1 and t2 equal struct types when field names are ignored?
 // For deciding whether the result struct from g can be copied
 // directly when compiling f(g()).
@@ -655,7 +542,7 @@ func eqtypenoname(t1 *types.Type, t2 *types.Type) bool {
 	}
 	for i, f1 := range t1.FieldSlice() {
 		f2 := t2.Field(i)
-		if !eqtype(f1.Type, f2.Type) {
+		if !types.Identical(f1.Type, f2.Type) {
 			return false
 		}
 	}
@@ -678,7 +565,7 @@ func assignop(src *types.Type, dst *types.Type, why *string) Op {
 	}
 
 	// 1. src type is identical to dst.
-	if eqtype(src, dst) {
+	if types.Identical(src, dst) {
 		return OCONVNOP
 	}
 
@@ -689,7 +576,7 @@ func assignop(src *types.Type, dst *types.Type, why *string) Op {
 	// we want to recompute the itab. Recomputing the itab ensures
 	// that itabs are unique (thus an interface with a compile-time
 	// type I has an itab with interface type I).
-	if eqtype(src.Orig, dst.Orig) {
+	if types.Identical(src.Orig, dst.Orig) {
 		if src.IsEmptyInterface() {
 			// Conversion between two empty interfaces
 			// requires no code.
@@ -757,7 +644,7 @@ func assignop(src *types.Type, dst *types.Type, why *string) Op {
 	// src and dst have identical element types, and
 	// either src or dst is not a named type.
 	if src.IsChan() && src.ChanDir() == types.Cboth && dst.IsChan() {
-		if eqtype(src.Elem(), dst.Elem()) && (src.Sym == nil || dst.Sym == nil) {
+		if types.Identical(src.Elem(), dst.Elem()) && (src.Sym == nil || dst.Sym == nil) {
 			return OCONVNOP
 		}
 	}
@@ -828,14 +715,14 @@ func convertop(src *types.Type, dst *types.Type, why *string) Op {
 	}
 
 	// 2. Ignoring struct tags, src and dst have identical underlying types.
-	if eqtypeIgnoreTags(src.Orig, dst.Orig) {
+	if types.IdenticalIgnoreTags(src.Orig, dst.Orig) {
 		return OCONVNOP
 	}
 
 	// 3. src and dst are unnamed pointer types and, ignoring struct tags,
 	// their base types have identical underlying types.
 	if src.IsPtr() && dst.IsPtr() && src.Sym == nil && dst.Sym == nil {
-		if eqtypeIgnoreTags(src.Elem().Orig, dst.Elem().Orig) {
+		if types.IdenticalIgnoreTags(src.Elem().Orig, dst.Elem().Orig) {
 			return OCONVNOP
 		}
 	}
@@ -938,7 +825,7 @@ func assignconvfn(n *Node, t *types.Type, context func() string) *Node {
 		}
 	}
 
-	if eqtype(n.Type, t) {
+	if types.Identical(n.Type, t) {
 		return n
 	}
 
@@ -1804,7 +1691,7 @@ func implements(t, iface *types.Type, m, samename **types.Field, ptr *int) bool
 				return false
 			}
 			tm := tms[i]
-			if !eqtype(tm.Type, im.Type) {
+			if !types.Identical(tm.Type, im.Type) {
 				*m = im
 				*samename = tm
 				*ptr = 0
@@ -1836,7 +1723,7 @@ func implements(t, iface *types.Type, m, samename **types.Field, ptr *int) bool
 			return false
 		}
 		tm := tms[i]
-		if tm.Nointerface() || !eqtype(tm.Type, im.Type) {
+		if tm.Nointerface() || !types.Identical(tm.Type, im.Type) {
 			*m = im
 			*samename = tm
 			*ptr = 0
diff --git a/src/cmd/compile/internal/gc/swt.go b/src/cmd/compile/internal/gc/swt.go
index b668409a88..965c545660 100644
--- a/src/cmd/compile/internal/gc/swt.go
+++ b/src/cmd/compile/internal/gc/swt.go
@@ -611,7 +611,7 @@ Outer:
 			continue
 		}
 		for _, n := range prev {
-			if eqtype(n.Left.Type, c.node.Left.Type) {
+			if types.Identical(n.Left.Type, c.node.Left.Type) {
 				yyerrorl(c.node.Pos, "duplicate case %v in type switch\n\tprevious case at %v", c.node.Left.Type, n.Line())
 				// avoid double-reporting errors
 				continue Outer
diff --git a/src/cmd/compile/internal/gc/typecheck.go b/src/cmd/compile/internal/gc/typecheck.go
index 617215c702..992e59a010 100644
--- a/src/cmd/compile/internal/gc/typecheck.go
+++ b/src/cmd/compile/internal/gc/typecheck.go
@@ -632,7 +632,7 @@ func typecheck1(n *Node, top int) *Node {
 			et = TINT
 		}
 		aop := OXXX
-		if iscmp[n.Op] && t.Etype != TIDEAL && !eqtype(l.Type, r.Type) {
+		if iscmp[n.Op] && t.Etype != TIDEAL && !types.Identical(l.Type, r.Type) {
 			// comparison is okay as long as one side is
 			// assignable to the other.  convert so they have
 			// the same type.
@@ -687,7 +687,7 @@ func typecheck1(n *Node, top int) *Node {
 			et = t.Etype
 		}
 
-		if t.Etype != TIDEAL && !eqtype(l.Type, r.Type) {
+		if t.Etype != TIDEAL && !types.Identical(l.Type, r.Type) {
 			l, r = defaultlit2(l, r, true)
 			if r.Type.IsInterface() == l.Type.IsInterface() || aop == 0 {
 				yyerror("invalid operation: %v (mismatched types %v and %v)", n, l.Type, r.Type)
@@ -1233,7 +1233,7 @@ func typecheck1(n *Node, top int) *Node {
 			// It isn't necessary, so just do a sanity check.
 			tp := t.Recv().Type
 
-			if l.Left == nil || !eqtype(l.Left.Type, tp) {
+			if l.Left == nil || !types.Identical(l.Left.Type, tp) {
 				Fatalf("method receiver")
 			}
 
@@ -1452,7 +1452,7 @@ func typecheck1(n *Node, top int) *Node {
 			n.Right = r
 		}
 
-		if !eqtype(l.Type, r.Type) {
+		if !types.Identical(l.Type, r.Type) {
 			yyerror("invalid operation: %v (mismatched types %v and %v)", n, l.Type, r.Type)
 			n.Type = nil
 			return n
@@ -1657,7 +1657,7 @@ func typecheck1(n *Node, top int) *Node {
 
 		// copy([]byte, string)
 		if n.Left.Type.IsSlice() && n.Right.Type.IsString() {
-			if eqtype(n.Left.Type.Elem(), types.Bytetype) {
+			if types.Identical(n.Left.Type.Elem(), types.Bytetype) {
 				break
 			}
 			yyerror("arguments to copy have different element types: %L and string", n.Left.Type)
@@ -1677,7 +1677,7 @@ func typecheck1(n *Node, top int) *Node {
 			return n
 		}
 
-		if !eqtype(n.Left.Type.Elem(), n.Right.Type.Elem()) {
+		if !types.Identical(n.Left.Type.Elem(), n.Right.Type.Elem()) {
 			yyerror("arguments to copy have different element types: %L and %L", n.Left.Type, n.Right.Type)
 			n.Type = nil
 			return n
@@ -2479,17 +2479,17 @@ func lookdot(n *Node, t *types.Type, dostrcmp int) *types.Field {
 		tt := n.Left.Type
 		dowidth(tt)
 		rcvr := f2.Type.Recv().Type
-		if !eqtype(rcvr, tt) {
-			if rcvr.IsPtr() && eqtype(rcvr.Elem(), tt) {
+		if !types.Identical(rcvr, tt) {
+			if rcvr.IsPtr() && types.Identical(rcvr.Elem(), tt) {
 				checklvalue(n.Left, "call pointer method on")
 				n.Left = nod(OADDR, n.Left, nil)
 				n.Left.SetImplicit(true)
 				n.Left = typecheck(n.Left, Etype|Erv)
-			} else if tt.IsPtr() && !rcvr.IsPtr() && eqtype(tt.Elem(), rcvr) {
+			} else if tt.IsPtr() && !rcvr.IsPtr() && types.Identical(tt.Elem(), rcvr) {
 				n.Left = nod(OIND, n.Left, nil)
 				n.Left.SetImplicit(true)
 				n.Left = typecheck(n.Left, Etype|Erv)
-			} else if tt.IsPtr() && tt.Elem().IsPtr() && eqtype(derefall(tt), derefall(rcvr)) {
+			} else if tt.IsPtr() && tt.Elem().IsPtr() && types.Identical(derefall(tt), derefall(rcvr)) {
 				yyerror("calling method %v with receiver %L requires explicit dereference", n.Sym, n.Left)
 				for tt.IsPtr() {
 					// Stop one level early for method with pointer receiver.
@@ -2831,7 +2831,7 @@ func keydup(n *Node, hash map[uint32][]*Node) {
 		if a.Op == OCONVIFACE && orign.Op == OCONVIFACE {
 			a = a.Left
 		}
-		if !eqtype(a.Type, n.Type) {
+		if !types.Identical(a.Type, n.Type) {
 			continue
 		}
 		cmp.Right = a
@@ -2875,7 +2875,7 @@ func pushtype(n *Node, t *types.Type) {
 		n.Right.SetImplicit(true) // * is okay
 	} else if Debug['s'] != 0 {
 		n.Right = typecheck(n.Right, Etype)
-		if n.Right.Type != nil && eqtype(n.Right.Type, t) {
+		if n.Right.Type != nil && types.Identical(n.Right.Type, t) {
 			fmt.Printf("%v: redundant type: %v\n", n.Line(), t)
 		}
 	}
@@ -3261,7 +3261,7 @@ func checkassignlist(stmt *Node, l Nodes) {
 // lvalue expression is for OSLICE and OAPPEND optimizations, and it
 // is correct in those settings.
 func samesafeexpr(l *Node, r *Node) bool {
-	if l.Op != r.Op || !eqtype(l.Type, r.Type) {
+	if l.Op != r.Op || !types.Identical(l.Type, r.Type) {
 		return false
 	}
 
@@ -3702,7 +3702,7 @@ func typecheckdef(n *Node) {
 				goto ret
 			}
 
-			if !e.Type.IsUntyped() && !eqtype(t, e.Type) {
+			if !e.Type.IsUntyped() && !types.Identical(t, e.Type) {
 				yyerrorl(n.Pos, "cannot use %L as type %v in const initializer", e, t)
 				goto ret
 			}
diff --git a/src/cmd/compile/internal/gc/walk.go b/src/cmd/compile/internal/gc/walk.go
index 2d84302116..cc4b9ec2d3 100644
--- a/src/cmd/compile/internal/gc/walk.go
+++ b/src/cmd/compile/internal/gc/walk.go
@@ -1681,7 +1681,7 @@ func fncall(l *Node, rt *types.Type) bool {
 	if l.HasCall() || l.Op == OINDEXMAP {
 		return true
 	}
-	if eqtype(l.Type, rt) {
+	if types.Identical(l.Type, rt) {
 		return false
 	}
 	// There might be a conversion required, which might involve a runtime call.
@@ -2023,7 +2023,7 @@ func walkprint(nn *Node, init *Nodes) *Node {
 		r := nod(OCALL, on, nil)
 		if params := on.Type.Params().FieldSlice(); len(params) > 0 {
 			t := params[0].Type
-			if !eqtype(t, n.Type) {
+			if !types.Identical(t, n.Type) {
 				n = nod(OCONV, n, nil)
 				n.Type = t
 			}
@@ -2102,7 +2102,7 @@ func convas(n *Node, init *Nodes) *Node {
 		return n
 	}
 
-	if !eqtype(lt, rt) {
+	if !types.Identical(lt, rt) {
 		n.Right = assignconv(n.Right, lt, "assignment")
 		n.Right = walkexpr(n.Right, init)
 	}
@@ -2575,7 +2575,7 @@ func mkcall1(fn *Node, t *types.Type, init *Nodes, args ...*Node) *Node {
 }
 
 func conv(n *Node, t *types.Type) *Node {
-	if eqtype(n.Type, t) {
+	if types.Identical(n.Type, t) {
 		return n
 	}
 	n = nod(OCONV, n, nil)
@@ -2597,7 +2597,7 @@ func convnop(n *Node, t *types.Type) *Node {
 // We cannot use conv, because we allow converting bool to uint8 here,
 // which is forbidden in user code.
 func byteindex(n *Node) *Node {
-	if eqtype(n.Type, types.Types[TUINT8]) {
+	if types.Identical(n.Type, types.Types[TUINT8]) {
 		return n
 	}
 	n = nod(OCONV, n, nil)
@@ -3457,7 +3457,7 @@ func walkcompare(n *Node, init *Nodes) *Node {
 
 func walkcompareInterface(n *Node, init *Nodes) *Node {
 	// ifaceeq(i1 any-1, i2 any-2) (ret bool);
-	if !eqtype(n.Left.Type, n.Right.Type) {
+	if !types.Identical(n.Left.Type, n.Right.Type) {
 		Fatalf("ifaceeq %v %v %v", n.Op, n.Left.Type, n.Right.Type)
 	}
 	var fn *Node
diff --git a/src/cmd/compile/internal/types/identity.go b/src/cmd/compile/internal/types/identity.go
new file mode 100644
index 0000000000..2152485257
--- /dev/null
+++ b/src/cmd/compile/internal/types/identity.go
@@ -0,0 +1,119 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package types
+
+// Identical reports whether t1 and t2 are identical types, following
+// the spec rules. Receiver parameter types are ignored.
+func Identical(t1, t2 *Type) bool {
+	return identical(t1, t2, true, nil)
+}
+
+// IdenticalIgnoreTags is like Identical, but it ignores struct tags
+// for struct identity.
+func IdenticalIgnoreTags(t1, t2 *Type) bool {
+	return identical(t1, t2, false, nil)
+}
+
+type typePair struct {
+	t1 *Type
+	t2 *Type
+}
+
+func identical(t1, t2 *Type, cmpTags bool, assumedEqual map[typePair]struct{}) bool {
+	if t1 == t2 {
+		return true
+	}
+	if t1 == nil || t2 == nil || t1.Etype != t2.Etype || t1.Broke() || t2.Broke() {
+		return false
+	}
+	if t1.Sym != nil || t2.Sym != nil {
+		// Special case: we keep byte/uint8 and rune/int32
+		// separate for error messages. Treat them as equal.
+		switch t1.Etype {
+		case TUINT8:
+			return (t1 == Types[TUINT8] || t1 == Bytetype) && (t2 == Types[TUINT8] || t2 == Bytetype)
+		case TINT32:
+			return (t1 == Types[TINT32] || t1 == Runetype) && (t2 == Types[TINT32] || t2 == Runetype)
+		default:
+			return false
+		}
+	}
+
+	// Any cyclic type must go through a named type, and if one is
+	// named, it is only identical to the other if they are the
+	// same pointer (t1 == t2), so there's no chance of chasing
+	// cycles ad infinitum, so no need for a depth counter.
+	if assumedEqual == nil {
+		assumedEqual = make(map[typePair]struct{})
+	} else if _, ok := assumedEqual[typePair{t1, t2}]; ok {
+		return true
+	}
+	assumedEqual[typePair{t1, t2}] = struct{}{}
+
+	switch t1.Etype {
+	case TINTER:
+		if t1.NumFields() != t2.NumFields() {
+			return false
+		}
+		for i, f1 := range t1.FieldSlice() {
+			f2 := t2.Field(i)
+			if f1.Sym != f2.Sym || !identical(f1.Type, f2.Type, cmpTags, assumedEqual) {
+				return false
+			}
+		}
+		return true
+
+	case TSTRUCT:
+		if t1.NumFields() != t2.NumFields() {
+			return false
+		}
+		for i, f1 := range t1.FieldSlice() {
+			f2 := t2.Field(i)
+			if f1.Sym != f2.Sym || f1.Embedded != f2.Embedded || !identical(f1.Type, f2.Type, cmpTags, assumedEqual) {
+				return false
+			}
+			if cmpTags && f1.Note != f2.Note {
+				return false
+			}
+		}
+		return true
+
+	case TFUNC:
+		// Check parameters and result parameters for type equality.
+		// We intentionally ignore receiver parameters for type
+		// equality, because they're never relevant.
+		for _, f := range ParamsResults {
+			// Loop over fields in structs, ignoring argument names.
+			fs1, fs2 := f(t1).FieldSlice(), f(t2).FieldSlice()
+			if len(fs1) != len(fs2) {
+				return false
+			}
+			for i, f1 := range fs1 {
+				f2 := fs2[i]
+				if f1.Isddd() != f2.Isddd() || !identical(f1.Type, f2.Type, cmpTags, assumedEqual) {
+					return false
+				}
+			}
+		}
+		return true
+
+	case TARRAY:
+		if t1.NumElem() != t2.NumElem() {
+			return false
+		}
+
+	case TCHAN:
+		if t1.ChanDir() != t2.ChanDir() {
+			return false
+		}
+
+	case TMAP:
+		if !identical(t1.Key(), t2.Key(), cmpTags, assumedEqual) {
+			return false
+		}
+	}
+
+	return identical(t1.Elem(), t2.Elem(), cmpTags, assumedEqual)
+}

From 95dda75bde8a6625b857b5f8013eed5e9563fd02 Mon Sep 17 00:00:00 2001
From: Ben Shi 
Date: Thu, 18 Oct 2018 05:11:38 +0000
Subject: [PATCH 184/240] cmd/compile: optimize store combination on 386/amd64

This CL add 3 rules to combine byte-store to word-store on386 and
amd64.

Change-Id: Iffd9cda42f1961680c81def4edc773ad58f211b3
Reviewed-on: https://go-review.googlesource.com/c/143057
Run-TryBot: Ben Shi 
TryBot-Result: Gobot Gobot 
Reviewed-by: Keith Randall 
---
 src/cmd/compile/internal/ssa/gen/386.rules   |  10 +
 src/cmd/compile/internal/ssa/gen/AMD64.rules |  19 ++
 src/cmd/compile/internal/ssa/rewrite386.go   |  62 +++++
 src/cmd/compile/internal/ssa/rewriteAMD64.go | 236 ++++++++++++++++++-
 test/codegen/memcombine.go                   |   6 +
 5 files changed, 332 insertions(+), 1 deletion(-)

diff --git a/src/cmd/compile/internal/ssa/gen/386.rules b/src/cmd/compile/internal/ssa/gen/386.rules
index 3a54a2a206..2241a65d55 100644
--- a/src/cmd/compile/internal/ssa/gen/386.rules
+++ b/src/cmd/compile/internal/ssa/gen/386.rules
@@ -1127,11 +1127,21 @@
   && ValAndOff(a).Off() + 1 == ValAndOff(c).Off()
   && clobber(x)
   -> (MOVWstoreconst [makeValAndOff(ValAndOff(a).Val()&0xff | ValAndOff(c).Val()<<8, ValAndOff(a).Off())] {s} p mem)
+(MOVBstoreconst [a] {s} p x:(MOVBstoreconst [c] {s} p mem))
+  && x.Uses == 1
+  && ValAndOff(a).Off() + 1 == ValAndOff(c).Off()
+  && clobber(x)
+  -> (MOVWstoreconst [makeValAndOff(ValAndOff(a).Val()&0xff | ValAndOff(c).Val()<<8, ValAndOff(a).Off())] {s} p mem)
 (MOVWstoreconst [c] {s} p x:(MOVWstoreconst [a] {s} p mem))
   && x.Uses == 1
   && ValAndOff(a).Off() + 2 == ValAndOff(c).Off()
   && clobber(x)
   -> (MOVLstoreconst [makeValAndOff(ValAndOff(a).Val()&0xffff | ValAndOff(c).Val()<<16, ValAndOff(a).Off())] {s} p mem)
+(MOVWstoreconst [a] {s} p x:(MOVWstoreconst [c] {s} p mem))
+  && x.Uses == 1
+  && ValAndOff(a).Off() + 2 == ValAndOff(c).Off()
+  && clobber(x)
+  -> (MOVLstoreconst [makeValAndOff(ValAndOff(a).Val()&0xffff | ValAndOff(c).Val()<<16, ValAndOff(a).Off())] {s} p mem)
 
 (MOVBstoreconstidx1 [c] {s} p i x:(MOVBstoreconstidx1 [a] {s} p i mem))
   && x.Uses == 1
diff --git a/src/cmd/compile/internal/ssa/gen/AMD64.rules b/src/cmd/compile/internal/ssa/gen/AMD64.rules
index adb94c3bfe..7bba4bcccb 100644
--- a/src/cmd/compile/internal/ssa/gen/AMD64.rules
+++ b/src/cmd/compile/internal/ssa/gen/AMD64.rules
@@ -2125,16 +2125,31 @@
   && ValAndOff(a).Off() + 1 == ValAndOff(c).Off()
   && clobber(x)
   -> (MOVWstoreconst [makeValAndOff(ValAndOff(a).Val()&0xff | ValAndOff(c).Val()<<8, ValAndOff(a).Off())] {s} p mem)
+(MOVBstoreconst [a] {s} p x:(MOVBstoreconst [c] {s} p mem))
+  && x.Uses == 1
+  && ValAndOff(a).Off() + 1 == ValAndOff(c).Off()
+  && clobber(x)
+  -> (MOVWstoreconst [makeValAndOff(ValAndOff(a).Val()&0xff | ValAndOff(c).Val()<<8, ValAndOff(a).Off())] {s} p mem)
 (MOVWstoreconst [c] {s} p x:(MOVWstoreconst [a] {s} p mem))
   && x.Uses == 1
   && ValAndOff(a).Off() + 2 == ValAndOff(c).Off()
   && clobber(x)
   -> (MOVLstoreconst [makeValAndOff(ValAndOff(a).Val()&0xffff | ValAndOff(c).Val()<<16, ValAndOff(a).Off())] {s} p mem)
+(MOVWstoreconst [a] {s} p x:(MOVWstoreconst [c] {s} p mem))
+  && x.Uses == 1
+  && ValAndOff(a).Off() + 2 == ValAndOff(c).Off()
+  && clobber(x)
+  -> (MOVLstoreconst [makeValAndOff(ValAndOff(a).Val()&0xffff | ValAndOff(c).Val()<<16, ValAndOff(a).Off())] {s} p mem)
 (MOVLstoreconst [c] {s} p x:(MOVLstoreconst [a] {s} p mem))
   && x.Uses == 1
   && ValAndOff(a).Off() + 4 == ValAndOff(c).Off()
   && clobber(x)
   -> (MOVQstore [ValAndOff(a).Off()] {s} p (MOVQconst [ValAndOff(a).Val()&0xffffffff | ValAndOff(c).Val()<<32]) mem)
+(MOVLstoreconst [a] {s} p x:(MOVLstoreconst [c] {s} p mem))
+  && x.Uses == 1
+  && ValAndOff(a).Off() + 4 == ValAndOff(c).Off()
+  && clobber(x)
+  -> (MOVQstore [ValAndOff(a).Off()] {s} p (MOVQconst [ValAndOff(a).Val()&0xffffffff | ValAndOff(c).Val()<<32]) mem)
 (MOVQstoreconst [c] {s} p x:(MOVQstoreconst [c2] {s} p mem))
   && config.useSSE
   && x.Uses == 1
@@ -2176,6 +2191,10 @@
   && x.Uses == 1
   && clobber(x)
   -> (MOVWstore [i-1] {s} p w mem)
+(MOVBstore [i] {s} p w x:(MOVBstore [i+1] {s} p (SHR(W|L|Q)const [8] w) mem))
+  && x.Uses == 1
+  && clobber(x)
+  -> (MOVWstore [i] {s} p w mem)
 (MOVBstore [i] {s} p (SHR(L|Q)const [j] w) x:(MOVBstore [i-1] {s} p w0:(SHR(L|Q)const [j-8] w) mem))
   && x.Uses == 1
   && clobber(x)
diff --git a/src/cmd/compile/internal/ssa/rewrite386.go b/src/cmd/compile/internal/ssa/rewrite386.go
index 2fce9c151e..61bdfcbcbb 100644
--- a/src/cmd/compile/internal/ssa/rewrite386.go
+++ b/src/cmd/compile/internal/ssa/rewrite386.go
@@ -5916,6 +5916,37 @@ func rewriteValue386_Op386MOVBstoreconst_0(v *Value) bool {
 		v.AddArg(mem)
 		return true
 	}
+	// match: (MOVBstoreconst [a] {s} p x:(MOVBstoreconst [c] {s} p mem))
+	// cond: x.Uses == 1 && ValAndOff(a).Off() + 1 == ValAndOff(c).Off() && clobber(x)
+	// result: (MOVWstoreconst [makeValAndOff(ValAndOff(a).Val()&0xff | ValAndOff(c).Val()<<8, ValAndOff(a).Off())] {s} p mem)
+	for {
+		a := v.AuxInt
+		s := v.Aux
+		_ = v.Args[1]
+		p := v.Args[0]
+		x := v.Args[1]
+		if x.Op != Op386MOVBstoreconst {
+			break
+		}
+		c := x.AuxInt
+		if x.Aux != s {
+			break
+		}
+		_ = x.Args[1]
+		if p != x.Args[0] {
+			break
+		}
+		mem := x.Args[1]
+		if !(x.Uses == 1 && ValAndOff(a).Off()+1 == ValAndOff(c).Off() && clobber(x)) {
+			break
+		}
+		v.reset(Op386MOVWstoreconst)
+		v.AuxInt = makeValAndOff(ValAndOff(a).Val()&0xff|ValAndOff(c).Val()<<8, ValAndOff(a).Off())
+		v.Aux = s
+		v.AddArg(p)
+		v.AddArg(mem)
+		return true
+	}
 	return false
 }
 func rewriteValue386_Op386MOVBstoreconstidx1_0(v *Value) bool {
@@ -11729,6 +11760,37 @@ func rewriteValue386_Op386MOVWstoreconst_0(v *Value) bool {
 		v.AddArg(mem)
 		return true
 	}
+	// match: (MOVWstoreconst [a] {s} p x:(MOVWstoreconst [c] {s} p mem))
+	// cond: x.Uses == 1 && ValAndOff(a).Off() + 2 == ValAndOff(c).Off() && clobber(x)
+	// result: (MOVLstoreconst [makeValAndOff(ValAndOff(a).Val()&0xffff | ValAndOff(c).Val()<<16, ValAndOff(a).Off())] {s} p mem)
+	for {
+		a := v.AuxInt
+		s := v.Aux
+		_ = v.Args[1]
+		p := v.Args[0]
+		x := v.Args[1]
+		if x.Op != Op386MOVWstoreconst {
+			break
+		}
+		c := x.AuxInt
+		if x.Aux != s {
+			break
+		}
+		_ = x.Args[1]
+		if p != x.Args[0] {
+			break
+		}
+		mem := x.Args[1]
+		if !(x.Uses == 1 && ValAndOff(a).Off()+2 == ValAndOff(c).Off() && clobber(x)) {
+			break
+		}
+		v.reset(Op386MOVLstoreconst)
+		v.AuxInt = makeValAndOff(ValAndOff(a).Val()&0xffff|ValAndOff(c).Val()<<16, ValAndOff(a).Off())
+		v.Aux = s
+		v.AddArg(p)
+		v.AddArg(mem)
+		return true
+	}
 	return false
 }
 func rewriteValue386_Op386MOVWstoreconstidx1_0(v *Value) bool {
diff --git a/src/cmd/compile/internal/ssa/rewriteAMD64.go b/src/cmd/compile/internal/ssa/rewriteAMD64.go
index 254c40a4ea..c7aa87b956 100644
--- a/src/cmd/compile/internal/ssa/rewriteAMD64.go
+++ b/src/cmd/compile/internal/ssa/rewriteAMD64.go
@@ -248,7 +248,7 @@ func rewriteValueAMD64(v *Value) bool {
 	case OpAMD64MOVBloadidx1:
 		return rewriteValueAMD64_OpAMD64MOVBloadidx1_0(v)
 	case OpAMD64MOVBstore:
-		return rewriteValueAMD64_OpAMD64MOVBstore_0(v) || rewriteValueAMD64_OpAMD64MOVBstore_10(v) || rewriteValueAMD64_OpAMD64MOVBstore_20(v)
+		return rewriteValueAMD64_OpAMD64MOVBstore_0(v) || rewriteValueAMD64_OpAMD64MOVBstore_10(v) || rewriteValueAMD64_OpAMD64MOVBstore_20(v) || rewriteValueAMD64_OpAMD64MOVBstore_30(v)
 	case OpAMD64MOVBstoreconst:
 		return rewriteValueAMD64_OpAMD64MOVBstoreconst_0(v)
 	case OpAMD64MOVBstoreconstidx1:
@@ -13556,6 +13556,141 @@ func rewriteValueAMD64_OpAMD64MOVBstore_20(v *Value) bool {
 		v.AddArg(mem)
 		return true
 	}
+	// match: (MOVBstore [i] {s} p w x:(MOVBstore [i+1] {s} p (SHRWconst [8] w) mem))
+	// cond: x.Uses == 1 && clobber(x)
+	// result: (MOVWstore [i] {s} p w mem)
+	for {
+		i := v.AuxInt
+		s := v.Aux
+		_ = v.Args[2]
+		p := v.Args[0]
+		w := v.Args[1]
+		x := v.Args[2]
+		if x.Op != OpAMD64MOVBstore {
+			break
+		}
+		if x.AuxInt != i+1 {
+			break
+		}
+		if x.Aux != s {
+			break
+		}
+		_ = x.Args[2]
+		if p != x.Args[0] {
+			break
+		}
+		x_1 := x.Args[1]
+		if x_1.Op != OpAMD64SHRWconst {
+			break
+		}
+		if x_1.AuxInt != 8 {
+			break
+		}
+		if w != x_1.Args[0] {
+			break
+		}
+		mem := x.Args[2]
+		if !(x.Uses == 1 && clobber(x)) {
+			break
+		}
+		v.reset(OpAMD64MOVWstore)
+		v.AuxInt = i
+		v.Aux = s
+		v.AddArg(p)
+		v.AddArg(w)
+		v.AddArg(mem)
+		return true
+	}
+	// match: (MOVBstore [i] {s} p w x:(MOVBstore [i+1] {s} p (SHRLconst [8] w) mem))
+	// cond: x.Uses == 1 && clobber(x)
+	// result: (MOVWstore [i] {s} p w mem)
+	for {
+		i := v.AuxInt
+		s := v.Aux
+		_ = v.Args[2]
+		p := v.Args[0]
+		w := v.Args[1]
+		x := v.Args[2]
+		if x.Op != OpAMD64MOVBstore {
+			break
+		}
+		if x.AuxInt != i+1 {
+			break
+		}
+		if x.Aux != s {
+			break
+		}
+		_ = x.Args[2]
+		if p != x.Args[0] {
+			break
+		}
+		x_1 := x.Args[1]
+		if x_1.Op != OpAMD64SHRLconst {
+			break
+		}
+		if x_1.AuxInt != 8 {
+			break
+		}
+		if w != x_1.Args[0] {
+			break
+		}
+		mem := x.Args[2]
+		if !(x.Uses == 1 && clobber(x)) {
+			break
+		}
+		v.reset(OpAMD64MOVWstore)
+		v.AuxInt = i
+		v.Aux = s
+		v.AddArg(p)
+		v.AddArg(w)
+		v.AddArg(mem)
+		return true
+	}
+	// match: (MOVBstore [i] {s} p w x:(MOVBstore [i+1] {s} p (SHRQconst [8] w) mem))
+	// cond: x.Uses == 1 && clobber(x)
+	// result: (MOVWstore [i] {s} p w mem)
+	for {
+		i := v.AuxInt
+		s := v.Aux
+		_ = v.Args[2]
+		p := v.Args[0]
+		w := v.Args[1]
+		x := v.Args[2]
+		if x.Op != OpAMD64MOVBstore {
+			break
+		}
+		if x.AuxInt != i+1 {
+			break
+		}
+		if x.Aux != s {
+			break
+		}
+		_ = x.Args[2]
+		if p != x.Args[0] {
+			break
+		}
+		x_1 := x.Args[1]
+		if x_1.Op != OpAMD64SHRQconst {
+			break
+		}
+		if x_1.AuxInt != 8 {
+			break
+		}
+		if w != x_1.Args[0] {
+			break
+		}
+		mem := x.Args[2]
+		if !(x.Uses == 1 && clobber(x)) {
+			break
+		}
+		v.reset(OpAMD64MOVWstore)
+		v.AuxInt = i
+		v.Aux = s
+		v.AddArg(p)
+		v.AddArg(w)
+		v.AddArg(mem)
+		return true
+	}
 	// match: (MOVBstore [i] {s} p (SHRLconst [j] w) x:(MOVBstore [i-1] {s} p w0:(SHRLconst [j-8] w) mem))
 	// cond: x.Uses == 1 && clobber(x)
 	// result: (MOVWstore [i-1] {s} p w0 mem)
@@ -13723,6 +13858,9 @@ func rewriteValueAMD64_OpAMD64MOVBstore_20(v *Value) bool {
 		v.AddArg(mem)
 		return true
 	}
+	return false
+}
+func rewriteValueAMD64_OpAMD64MOVBstore_30(v *Value) bool {
 	// match: (MOVBstore [off1] {sym1} (LEAL [off2] {sym2} base) val mem)
 	// cond: canMergeSym(sym1, sym2) && is32Bit(off1+off2)
 	// result: (MOVBstore [off1+off2] {mergeSym(sym1,sym2)} base val mem)
@@ -13910,6 +14048,37 @@ func rewriteValueAMD64_OpAMD64MOVBstoreconst_0(v *Value) bool {
 		v.AddArg(mem)
 		return true
 	}
+	// match: (MOVBstoreconst [a] {s} p x:(MOVBstoreconst [c] {s} p mem))
+	// cond: x.Uses == 1 && ValAndOff(a).Off() + 1 == ValAndOff(c).Off() && clobber(x)
+	// result: (MOVWstoreconst [makeValAndOff(ValAndOff(a).Val()&0xff | ValAndOff(c).Val()<<8, ValAndOff(a).Off())] {s} p mem)
+	for {
+		a := v.AuxInt
+		s := v.Aux
+		_ = v.Args[1]
+		p := v.Args[0]
+		x := v.Args[1]
+		if x.Op != OpAMD64MOVBstoreconst {
+			break
+		}
+		c := x.AuxInt
+		if x.Aux != s {
+			break
+		}
+		_ = x.Args[1]
+		if p != x.Args[0] {
+			break
+		}
+		mem := x.Args[1]
+		if !(x.Uses == 1 && ValAndOff(a).Off()+1 == ValAndOff(c).Off() && clobber(x)) {
+			break
+		}
+		v.reset(OpAMD64MOVWstoreconst)
+		v.AuxInt = makeValAndOff(ValAndOff(a).Val()&0xff|ValAndOff(c).Val()<<8, ValAndOff(a).Off())
+		v.Aux = s
+		v.AddArg(p)
+		v.AddArg(mem)
+		return true
+	}
 	// match: (MOVBstoreconst [sc] {sym1} (LEAL [off] {sym2} ptr) mem)
 	// cond: canMergeSym(sym1, sym2) && ValAndOff(sc).canAdd(off)
 	// result: (MOVBstoreconst [ValAndOff(sc).add(off)] {mergeSym(sym1, sym2)} ptr mem)
@@ -17553,6 +17722,40 @@ func rewriteValueAMD64_OpAMD64MOVLstoreconst_0(v *Value) bool {
 		v.AddArg(mem)
 		return true
 	}
+	// match: (MOVLstoreconst [a] {s} p x:(MOVLstoreconst [c] {s} p mem))
+	// cond: x.Uses == 1 && ValAndOff(a).Off() + 4 == ValAndOff(c).Off() && clobber(x)
+	// result: (MOVQstore [ValAndOff(a).Off()] {s} p (MOVQconst [ValAndOff(a).Val()&0xffffffff | ValAndOff(c).Val()<<32]) mem)
+	for {
+		a := v.AuxInt
+		s := v.Aux
+		_ = v.Args[1]
+		p := v.Args[0]
+		x := v.Args[1]
+		if x.Op != OpAMD64MOVLstoreconst {
+			break
+		}
+		c := x.AuxInt
+		if x.Aux != s {
+			break
+		}
+		_ = x.Args[1]
+		if p != x.Args[0] {
+			break
+		}
+		mem := x.Args[1]
+		if !(x.Uses == 1 && ValAndOff(a).Off()+4 == ValAndOff(c).Off() && clobber(x)) {
+			break
+		}
+		v.reset(OpAMD64MOVQstore)
+		v.AuxInt = ValAndOff(a).Off()
+		v.Aux = s
+		v.AddArg(p)
+		v0 := b.NewValue0(v.Pos, OpAMD64MOVQconst, typ.UInt64)
+		v0.AuxInt = ValAndOff(a).Val()&0xffffffff | ValAndOff(c).Val()<<32
+		v.AddArg(v0)
+		v.AddArg(mem)
+		return true
+	}
 	// match: (MOVLstoreconst [sc] {sym1} (LEAL [off] {sym2} ptr) mem)
 	// cond: canMergeSym(sym1, sym2) && ValAndOff(sc).canAdd(off)
 	// result: (MOVLstoreconst [ValAndOff(sc).add(off)] {mergeSym(sym1, sym2)} ptr mem)
@@ -23867,6 +24070,37 @@ func rewriteValueAMD64_OpAMD64MOVWstoreconst_0(v *Value) bool {
 		v.AddArg(mem)
 		return true
 	}
+	// match: (MOVWstoreconst [a] {s} p x:(MOVWstoreconst [c] {s} p mem))
+	// cond: x.Uses == 1 && ValAndOff(a).Off() + 2 == ValAndOff(c).Off() && clobber(x)
+	// result: (MOVLstoreconst [makeValAndOff(ValAndOff(a).Val()&0xffff | ValAndOff(c).Val()<<16, ValAndOff(a).Off())] {s} p mem)
+	for {
+		a := v.AuxInt
+		s := v.Aux
+		_ = v.Args[1]
+		p := v.Args[0]
+		x := v.Args[1]
+		if x.Op != OpAMD64MOVWstoreconst {
+			break
+		}
+		c := x.AuxInt
+		if x.Aux != s {
+			break
+		}
+		_ = x.Args[1]
+		if p != x.Args[0] {
+			break
+		}
+		mem := x.Args[1]
+		if !(x.Uses == 1 && ValAndOff(a).Off()+2 == ValAndOff(c).Off() && clobber(x)) {
+			break
+		}
+		v.reset(OpAMD64MOVLstoreconst)
+		v.AuxInt = makeValAndOff(ValAndOff(a).Val()&0xffff|ValAndOff(c).Val()<<16, ValAndOff(a).Off())
+		v.Aux = s
+		v.AddArg(p)
+		v.AddArg(mem)
+		return true
+	}
 	// match: (MOVWstoreconst [sc] {sym1} (LEAL [off] {sym2} ptr) mem)
 	// cond: canMergeSym(sym1, sym2) && ValAndOff(sc).canAdd(off)
 	// result: (MOVWstoreconst [ValAndOff(sc).add(off)] {mergeSym(sym1, sym2)} ptr mem)
diff --git a/test/codegen/memcombine.go b/test/codegen/memcombine.go
index db49142e25..b3d2cb2067 100644
--- a/test/codegen/memcombine.go
+++ b/test/codegen/memcombine.go
@@ -434,6 +434,7 @@ func store_le_byte_2(b []byte, val uint16) {
 func store_le_byte_2_inv(b []byte, val uint16) {
 	_ = b[2]
 	// 386:`MOVW\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`
+	// amd64:`MOVW\s[A-Z]+,\s1\([A-Z]+\)`,-`MOVB`
 	b[2], b[1] = byte(val>>8), byte(val)
 }
 
@@ -542,6 +543,8 @@ func zero_byte_2(b1, b2 []byte) {
 	// 386:`MOVW\s[$]0,\s\([A-Z]+\)`
 	b1[0], b1[1] = 0, 0
 	// arm64:"MOVH\tZR",-"MOVB"
+	// 386:`MOVW\s[$]0,\s\([A-Z]+\)`
+	// amd64:`MOVW\s[$]0,\s\([A-Z]+\)`
 	b2[1], b2[0] = 0, 0
 }
 
@@ -596,6 +599,8 @@ func zero_uint16_2(h1, h2 []uint16) {
 	// 386:`MOVL\s[$]0,\s\([A-Z]+\)`
 	h1[0], h1[1] = 0, 0
 	// arm64:"MOVW\tZR",-"MOVB",-"MOVH"
+	// amd64:`MOVL\s[$]0,\s\([A-Z]+\)`
+	// 386:`MOVL\s[$]0,\s\([A-Z]+\)`
 	h2[1], h2[0] = 0, 0
 }
 
@@ -620,6 +625,7 @@ func zero_uint32_2(w1, w2 []uint32) {
 	// amd64:`MOVQ\s[$]0,\s\([A-Z]+\)`
 	w1[0], w1[1] = 0, 0
 	// arm64:"MOVD\tZR",-"MOVB",-"MOVH",-"MOVW"
+	// amd64:`MOVQ\s[$]0,\s\([A-Z]+\)`
 	w2[1], w2[0] = 0, 0
 }
 

From ae0c435877d3aacb9af5e706c40f9dddde5d3e67 Mon Sep 17 00:00:00 2001
From: Rob Pike 
Date: Fri, 19 Oct 2018 10:48:53 +1100
Subject: [PATCH 185/240] flag: return a consistent parse error if the flag
 value is invalid

Return a consistently formatted error string that reports either
a parse error or a range error.

Before:
	invalid boolean value "3" for -debug: strconv.ParseBool: parsing "3": invalid syntax

After:
	invalid boolean value "3" for -debug: parse error

Fixes #26822

Change-Id: I60992bf23da32a4c0cf32472a8af486a3c9674ad
Reviewed-on: https://go-review.googlesource.com/c/143257
Reviewed-by: Ian Lance Taylor 
---
 src/flag/flag.go      | 43 +++++++++++++++++++++++++++++++++++
 src/flag/flag_test.go | 53 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 96 insertions(+)

diff --git a/src/flag/flag.go b/src/flag/flag.go
index ae84e1f775..2eef9d6ab9 100644
--- a/src/flag/flag.go
+++ b/src/flag/flag.go
@@ -83,6 +83,28 @@ import (
 // but no such flag is defined.
 var ErrHelp = errors.New("flag: help requested")
 
+// errParse is returned by Set if a flag's value fails to parse, such as with an invalid integer for Int.
+// It then gets wrapped through failf to provide more information.
+var errParse = errors.New("parse error")
+
+// errRange is returned by Set if a flag's value is out of range.
+// It then gets wrapped through failf to provide more information.
+var errRange = errors.New("value out of range")
+
+func numError(err error) error {
+	ne, ok := err.(*strconv.NumError)
+	if !ok {
+		return err
+	}
+	if ne.Err == strconv.ErrSyntax {
+		return errParse
+	}
+	if ne.Err == strconv.ErrRange {
+		return errRange
+	}
+	return err
+}
+
 // -- bool Value
 type boolValue bool
 
@@ -93,6 +115,9 @@ func newBoolValue(val bool, p *bool) *boolValue {
 
 func (b *boolValue) Set(s string) error {
 	v, err := strconv.ParseBool(s)
+	if err != nil {
+		err = errParse
+	}
 	*b = boolValue(v)
 	return err
 }
@@ -120,6 +145,9 @@ func newIntValue(val int, p *int) *intValue {
 
 func (i *intValue) Set(s string) error {
 	v, err := strconv.ParseInt(s, 0, strconv.IntSize)
+	if err != nil {
+		err = numError(err)
+	}
 	*i = intValue(v)
 	return err
 }
@@ -138,6 +166,9 @@ func newInt64Value(val int64, p *int64) *int64Value {
 
 func (i *int64Value) Set(s string) error {
 	v, err := strconv.ParseInt(s, 0, 64)
+	if err != nil {
+		err = numError(err)
+	}
 	*i = int64Value(v)
 	return err
 }
@@ -156,6 +187,9 @@ func newUintValue(val uint, p *uint) *uintValue {
 
 func (i *uintValue) Set(s string) error {
 	v, err := strconv.ParseUint(s, 0, strconv.IntSize)
+	if err != nil {
+		err = numError(err)
+	}
 	*i = uintValue(v)
 	return err
 }
@@ -174,6 +208,9 @@ func newUint64Value(val uint64, p *uint64) *uint64Value {
 
 func (i *uint64Value) Set(s string) error {
 	v, err := strconv.ParseUint(s, 0, 64)
+	if err != nil {
+		err = numError(err)
+	}
 	*i = uint64Value(v)
 	return err
 }
@@ -209,6 +246,9 @@ func newFloat64Value(val float64, p *float64) *float64Value {
 
 func (f *float64Value) Set(s string) error {
 	v, err := strconv.ParseFloat(s, 64)
+	if err != nil {
+		err = numError(err)
+	}
 	*f = float64Value(v)
 	return err
 }
@@ -227,6 +267,9 @@ func newDurationValue(val time.Duration, p *time.Duration) *durationValue {
 
 func (d *durationValue) Set(s string) error {
 	v, err := time.ParseDuration(s)
+	if err != nil {
+		err = errParse
+	}
 	*d = durationValue(v)
 	return err
 }
diff --git a/src/flag/flag_test.go b/src/flag/flag_test.go
index c7f0c07d44..0d9491c020 100644
--- a/src/flag/flag_test.go
+++ b/src/flag/flag_test.go
@@ -9,6 +9,7 @@ import (
 	. "flag"
 	"fmt"
 	"io"
+	"io/ioutil"
 	"os"
 	"sort"
 	"strconv"
@@ -491,3 +492,55 @@ func TestGetters(t *testing.T) {
 		t.Errorf("unexpected output: got %v, expected %v", fs.Output(), expectedOutput)
 	}
 }
+
+func TestParseError(t *testing.T) {
+	for _, typ := range []string{"bool", "int", "int64", "uint", "uint64", "float64", "duration"} {
+		fs := NewFlagSet("parse error test", ContinueOnError)
+		fs.SetOutput(ioutil.Discard)
+		_ = fs.Bool("bool", false, "")
+		_ = fs.Int("int", 0, "")
+		_ = fs.Int64("int64", 0, "")
+		_ = fs.Uint("uint", 0, "")
+		_ = fs.Uint64("uint64", 0, "")
+		_ = fs.Float64("float64", 0, "")
+		_ = fs.Duration("duration", 0, "")
+		// Strings cannot give errors.
+		args := []string{"-" + typ + "=x"}
+		err := fs.Parse(args) // x is not a valid setting for any flag.
+		if err == nil {
+			t.Errorf("Parse(%q)=%v; expected parse error", args, err)
+			continue
+		}
+		if !strings.Contains(err.Error(), "invalid") || !strings.Contains(err.Error(), "parse error") {
+			t.Errorf("Parse(%q)=%v; expected parse error", args, err)
+		}
+	}
+}
+
+func TestRangeError(t *testing.T) {
+	bad := []string{
+		"-int=123456789012345678901",
+		"-int64=123456789012345678901",
+		"-uint=123456789012345678901",
+		"-uint64=123456789012345678901",
+		"-float64=1e1000",
+	}
+	for _, arg := range bad {
+		fs := NewFlagSet("parse error test", ContinueOnError)
+		fs.SetOutput(ioutil.Discard)
+		_ = fs.Int("int", 0, "")
+		_ = fs.Int64("int64", 0, "")
+		_ = fs.Uint("uint", 0, "")
+		_ = fs.Uint64("uint64", 0, "")
+		_ = fs.Float64("float64", 0, "")
+		// Strings cannot give errors, and bools and durations do not return strconv.NumError.
+		err := fs.Parse([]string{arg})
+		if err == nil {
+			t.Errorf("Parse(%q)=%v; expected range error", arg, err)
+			continue
+		}
+		if !strings.Contains(err.Error(), "invalid") || !strings.Contains(err.Error(), "value out of range") {
+			t.Errorf("Parse(%q)=%v; expected range error", arg, err)
+		}
+	}
+}

From 628403fd6b02a8e71926b0cbc7c893121482628a Mon Sep 17 00:00:00 2001
From: Seebs 
Date: Thu, 18 Oct 2018 17:00:02 -0500
Subject: [PATCH 186/240] text/template: drop unused sortKeys function

Recent change golang.org/cl/142737 drops the only call site for the
sortKeys function. If it's not in use, it should probably not be there in
the code, lurking and preparing to bite us when someone calls that instead
of the new key sorter in fmtsort, resulting in strange inconsistencies.

Since the function isn't called, this should have no impact.
Related to, but does not fix, #21095.

Change-Id: I4695503ef4d5ce90d989ec952f01ea00cc15c79d
Reviewed-on: https://go-review.googlesource.com/c/143178
Reviewed-by: Brad Fitzpatrick 
Run-TryBot: Brad Fitzpatrick 
TryBot-Result: Gobot Gobot 
---
 src/text/template/exec.go | 27 ---------------------------
 1 file changed, 27 deletions(-)

diff --git a/src/text/template/exec.go b/src/text/template/exec.go
index 120d010a19..36cea3d24d 100644
--- a/src/text/template/exec.go
+++ b/src/text/template/exec.go
@@ -11,7 +11,6 @@ import (
 	"io"
 	"reflect"
 	"runtime"
-	"sort"
 	"strings"
 	"text/template/parse"
 )
@@ -960,29 +959,3 @@ func printableValue(v reflect.Value) (interface{}, bool) {
 	}
 	return v.Interface(), true
 }
-
-// sortKeys sorts (if it can) the slice of reflect.Values, which is a slice of map keys.
-func sortKeys(v []reflect.Value) []reflect.Value {
-	if len(v) <= 1 {
-		return v
-	}
-	switch v[0].Kind() {
-	case reflect.Float32, reflect.Float64:
-		sort.Slice(v, func(i, j int) bool {
-			return v[i].Float() < v[j].Float()
-		})
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-		sort.Slice(v, func(i, j int) bool {
-			return v[i].Int() < v[j].Int()
-		})
-	case reflect.String:
-		sort.Slice(v, func(i, j int) bool {
-			return v[i].String() < v[j].String()
-		})
-	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
-		sort.Slice(v, func(i, j int) bool {
-			return v[i].Uint() < v[j].Uint()
-		})
-	}
-	return v
-}

From be0f3c286b59a486bec798a4aa6e5eba512e49b8 Mon Sep 17 00:00:00 2001
From: Filippo Valsorda 
Date: Tue, 16 Oct 2018 23:47:55 -0400
Subject: [PATCH 187/240] crypto/tls: replace net.Pipe in tests with real TCP
 connections

crypto/tls is meant to work over network connections with buffering, not
synchronous connections, as explained in #24198. Tests based on net.Pipe
are unrealistic as reads and writes are matched one to one. Such tests
worked just thanks to the implementation details of the tls.Conn
internal buffering, and would break if for example the flush of the
first flight of the server was not entirely assimilated by the client
rawInput buffer before the client attempted to reply to the ServerHello.

Note that this might run into the Darwin network issues at #25696.

Fixed a few test races that were either hidden or synchronized by the
use of the in-memory net.Pipe.

Also, this gets us slightly more realistic benchmarks, reflecting some
syscall cost of Read and Write operations.

Change-Id: I5a597b3d7a81b8ccc776030cc837133412bf50f8
Reviewed-on: https://go-review.googlesource.com/c/142817
Run-TryBot: Filippo Valsorda 
TryBot-Result: Gobot Gobot 
Reviewed-by: Brad Fitzpatrick 
---
 src/crypto/tls/conn_test.go             |  7 ++-
 src/crypto/tls/handshake_client_test.go | 36 +++++------
 src/crypto/tls/handshake_server_test.go | 79 +++++++++++++------------
 src/crypto/tls/handshake_test.go        | 43 ++++++++++++++
 4 files changed, 107 insertions(+), 58 deletions(-)

diff --git a/src/crypto/tls/conn_test.go b/src/crypto/tls/conn_test.go
index 5c7f7ce2bb..f948717038 100644
--- a/src/crypto/tls/conn_test.go
+++ b/src/crypto/tls/conn_test.go
@@ -134,12 +134,13 @@ func TestCertificateSelection(t *testing.T) {
 
 // Run with multiple crypto configs to test the logic for computing TLS record overheads.
 func runDynamicRecordSizingTest(t *testing.T, config *Config) {
-	clientConn, serverConn := net.Pipe()
+	clientConn, serverConn := localPipe(t)
 
 	serverConfig := config.Clone()
 	serverConfig.DynamicRecordSizingDisabled = false
 	tlsConn := Server(serverConn, serverConfig)
 
+	handshakeDone := make(chan struct{})
 	recordSizesChan := make(chan []int, 1)
 	go func() {
 		// This goroutine performs a TLS handshake over clientConn and
@@ -153,6 +154,7 @@ func runDynamicRecordSizingTest(t *testing.T, config *Config) {
 			t.Errorf("Error from client handshake: %v", err)
 			return
 		}
+		close(handshakeDone)
 
 		var recordHeader [recordHeaderLen]byte
 		var record []byte
@@ -192,6 +194,7 @@ func runDynamicRecordSizingTest(t *testing.T, config *Config) {
 	if err := tlsConn.Handshake(); err != nil {
 		t.Fatalf("Error from server handshake: %s", err)
 	}
+	<-handshakeDone
 
 	// The server writes these plaintexts in order.
 	plaintext := bytes.Join([][]byte{
@@ -269,7 +272,7 @@ func (conn *hairpinConn) Close() error {
 func TestHairpinInClose(t *testing.T) {
 	// This tests that the underlying net.Conn can call back into the
 	// tls.Conn when being closed without deadlocking.
-	client, server := net.Pipe()
+	client, server := localPipe(t)
 	defer server.Close()
 	defer client.Close()
 
diff --git a/src/crypto/tls/handshake_client_test.go b/src/crypto/tls/handshake_client_test.go
index 1f1c93d102..dcd6914098 100644
--- a/src/crypto/tls/handshake_client_test.go
+++ b/src/crypto/tls/handshake_client_test.go
@@ -179,7 +179,7 @@ func (test *clientTest) connFromCommand() (conn *recordingConn, child *exec.Cmd,
 	var pemOut bytes.Buffer
 	pem.Encode(&pemOut, &pem.Block{Type: pemType + " PRIVATE KEY", Bytes: derBytes})
 
-	keyPath := tempFile(string(pemOut.Bytes()))
+	keyPath := tempFile(pemOut.String())
 	defer os.Remove(keyPath)
 
 	var command []string
@@ -293,7 +293,7 @@ func (test *clientTest) run(t *testing.T, write bool) {
 		}
 		clientConn = recordingConn
 	} else {
-		clientConn, serverConn = net.Pipe()
+		clientConn, serverConn = localPipe(t)
 	}
 
 	config := test.config
@@ -682,7 +682,7 @@ func TestClientResumption(t *testing.T) {
 	}
 
 	testResumeState := func(test string, didResume bool) {
-		_, hs, err := testHandshake(clientConfig, serverConfig)
+		_, hs, err := testHandshake(t, clientConfig, serverConfig)
 		if err != nil {
 			t.Fatalf("%s: handshake failed: %s", test, err)
 		}
@@ -800,7 +800,7 @@ func TestKeyLog(t *testing.T) {
 	serverConfig := testConfig.Clone()
 	serverConfig.KeyLogWriter = &serverBuf
 
-	c, s := net.Pipe()
+	c, s := localPipe(t)
 	done := make(chan bool)
 
 	go func() {
@@ -838,8 +838,8 @@ func TestKeyLog(t *testing.T) {
 		}
 	}
 
-	checkKeylogLine("client", string(clientBuf.Bytes()))
-	checkKeylogLine("server", string(serverBuf.Bytes()))
+	checkKeylogLine("client", clientBuf.String())
+	checkKeylogLine("server", serverBuf.String())
 }
 
 func TestHandshakeClientALPNMatch(t *testing.T) {
@@ -1021,7 +1021,7 @@ var hostnameInSNITests = []struct {
 
 func TestHostnameInSNI(t *testing.T) {
 	for _, tt := range hostnameInSNITests {
-		c, s := net.Pipe()
+		c, s := localPipe(t)
 
 		go func(host string) {
 			Client(c, &Config{ServerName: host, InsecureSkipVerify: true}).Handshake()
@@ -1059,7 +1059,7 @@ func TestServerSelectingUnconfiguredCipherSuite(t *testing.T) {
 	// This checks that the server can't select a cipher suite that the
 	// client didn't offer. See #13174.
 
-	c, s := net.Pipe()
+	c, s := localPipe(t)
 	errChan := make(chan error, 1)
 
 	go func() {
@@ -1228,7 +1228,7 @@ func TestVerifyPeerCertificate(t *testing.T) {
 	}
 
 	for i, test := range tests {
-		c, s := net.Pipe()
+		c, s := localPipe(t)
 		done := make(chan error)
 
 		var clientCalled, serverCalled bool
@@ -1287,7 +1287,7 @@ func (b *brokenConn) Write(data []byte) (int, error) {
 func TestFailedWrite(t *testing.T) {
 	// Test that a write error during the handshake is returned.
 	for _, breakAfter := range []int{0, 1} {
-		c, s := net.Pipe()
+		c, s := localPipe(t)
 		done := make(chan bool)
 
 		go func() {
@@ -1321,7 +1321,7 @@ func (wcc *writeCountingConn) Write(data []byte) (int, error) {
 }
 
 func TestBuffering(t *testing.T) {
-	c, s := net.Pipe()
+	c, s := localPipe(t)
 	done := make(chan bool)
 
 	clientWCC := &writeCountingConn{Conn: c}
@@ -1350,7 +1350,7 @@ func TestBuffering(t *testing.T) {
 }
 
 func TestAlertFlushing(t *testing.T) {
-	c, s := net.Pipe()
+	c, s := localPipe(t)
 	done := make(chan bool)
 
 	clientWCC := &writeCountingConn{Conn: c}
@@ -1399,7 +1399,7 @@ func TestHandshakeRace(t *testing.T) {
 	// order to provide some evidence that there are no races or deadlocks
 	// in the handshake locking.
 	for i := 0; i < 32; i++ {
-		c, s := net.Pipe()
+		c, s := localPipe(t)
 
 		go func() {
 			server := Server(s, testConfig)
@@ -1430,7 +1430,7 @@ func TestHandshakeRace(t *testing.T) {
 		go func() {
 			<-startRead
 			var reply [1]byte
-			if n, err := client.Read(reply[:]); err != nil || n != 1 {
+			if _, err := io.ReadFull(client, reply[:]); err != nil {
 				panic(err)
 			}
 			c.Close()
@@ -1559,7 +1559,7 @@ func TestGetClientCertificate(t *testing.T) {
 			err error
 		}
 
-		c, s := net.Pipe()
+		c, s := localPipe(t)
 		done := make(chan serverResult)
 
 		go func() {
@@ -1637,7 +1637,7 @@ RwBA9Xk1KBNF
 }
 
 func TestCloseClientConnectionOnIdleServer(t *testing.T) {
-	clientConn, serverConn := net.Pipe()
+	clientConn, serverConn := localPipe(t)
 	client := Client(clientConn, testConfig.Clone())
 	go func() {
 		var b [1]byte
@@ -1647,8 +1647,8 @@ func TestCloseClientConnectionOnIdleServer(t *testing.T) {
 	client.SetWriteDeadline(time.Now().Add(time.Second))
 	err := client.Handshake()
 	if err != nil {
-		if !strings.Contains(err.Error(), "read/write on closed pipe") {
-			t.Errorf("Error expected containing 'read/write on closed pipe' but got '%s'", err.Error())
+		if err, ok := err.(net.Error); ok && err.Timeout() {
+			t.Errorf("Expected a closed network connection error but got '%s'", err.Error())
 		}
 	} else {
 		t.Errorf("Error expected, but no error returned")
diff --git a/src/crypto/tls/handshake_server_test.go b/src/crypto/tls/handshake_server_test.go
index c366f47b17..44c67ed063 100644
--- a/src/crypto/tls/handshake_server_test.go
+++ b/src/crypto/tls/handshake_server_test.go
@@ -70,10 +70,7 @@ func testClientHello(t *testing.T, serverConfig *Config, m handshakeMessage) {
 }
 
 func testClientHelloFailure(t *testing.T, serverConfig *Config, m handshakeMessage, expectedSubStr string) {
-	// Create in-memory network connection,
-	// send message to server. Should return
-	// expected error.
-	c, s := net.Pipe()
+	c, s := localPipe(t)
 	go func() {
 		cli := Client(c, testConfig)
 		if ch, ok := m.(*clientHelloMsg); ok {
@@ -201,25 +198,26 @@ func TestRenegotiationExtension(t *testing.T) {
 		cipherSuites:                 []uint16{TLS_RSA_WITH_RC4_128_SHA},
 	}
 
-	var buf []byte
-	c, s := net.Pipe()
+	bufChan := make(chan []byte)
+	c, s := localPipe(t)
 
 	go func() {
 		cli := Client(c, testConfig)
 		cli.vers = clientHello.vers
 		cli.writeRecord(recordTypeHandshake, clientHello.marshal())
 
-		buf = make([]byte, 1024)
+		buf := make([]byte, 1024)
 		n, err := c.Read(buf)
 		if err != nil {
 			t.Errorf("Server read returned error: %s", err)
 			return
 		}
-		buf = buf[:n]
 		c.Close()
+		bufChan <- buf[:n]
 	}()
 
 	Server(s, testConfig).Handshake()
+	buf := <-bufChan
 
 	if len(buf) < 5+4 {
 		t.Fatalf("Server returned short message of length %d", len(buf))
@@ -262,22 +260,27 @@ func TestTLS12OnlyCipherSuites(t *testing.T) {
 		supportedPoints:    []uint8{pointFormatUncompressed},
 	}
 
-	c, s := net.Pipe()
-	var reply interface{}
-	var clientErr error
+	c, s := localPipe(t)
+	replyChan := make(chan interface{})
 	go func() {
 		cli := Client(c, testConfig)
 		cli.vers = clientHello.vers
 		cli.writeRecord(recordTypeHandshake, clientHello.marshal())
-		reply, clientErr = cli.readHandshake()
+		reply, err := cli.readHandshake()
 		c.Close()
+		if err != nil {
+			replyChan <- err
+		} else {
+			replyChan <- reply
+		}
 	}()
 	config := testConfig.Clone()
 	config.CipherSuites = clientHello.cipherSuites
 	Server(s, config).Handshake()
 	s.Close()
-	if clientErr != nil {
-		t.Fatal(clientErr)
+	reply := <-replyChan
+	if err, ok := reply.(error); ok {
+		t.Fatal(err)
 	}
 	serverHello, ok := reply.(*serverHelloMsg)
 	if !ok {
@@ -289,7 +292,7 @@ func TestTLS12OnlyCipherSuites(t *testing.T) {
 }
 
 func TestAlertForwarding(t *testing.T) {
-	c, s := net.Pipe()
+	c, s := localPipe(t)
 	go func() {
 		Client(c, testConfig).sendAlert(alertUnknownCA)
 		c.Close()
@@ -303,7 +306,7 @@ func TestAlertForwarding(t *testing.T) {
 }
 
 func TestClose(t *testing.T) {
-	c, s := net.Pipe()
+	c, s := localPipe(t)
 	go c.Close()
 
 	err := Server(s, testConfig).Handshake()
@@ -313,8 +316,8 @@ func TestClose(t *testing.T) {
 	}
 }
 
-func testHandshake(clientConfig, serverConfig *Config) (serverState, clientState ConnectionState, err error) {
-	c, s := net.Pipe()
+func testHandshake(t *testing.T, clientConfig, serverConfig *Config) (serverState, clientState ConnectionState, err error) {
+	c, s := localPipe(t)
 	done := make(chan bool)
 	go func() {
 		cli := Client(c, clientConfig)
@@ -341,7 +344,7 @@ func TestVersion(t *testing.T) {
 	clientConfig := &Config{
 		InsecureSkipVerify: true,
 	}
-	state, _, err := testHandshake(clientConfig, serverConfig)
+	state, _, err := testHandshake(t, clientConfig, serverConfig)
 	if err != nil {
 		t.Fatalf("handshake failed: %s", err)
 	}
@@ -360,7 +363,7 @@ func TestCipherSuitePreference(t *testing.T) {
 		CipherSuites:       []uint16{TLS_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_RC4_128_SHA},
 		InsecureSkipVerify: true,
 	}
-	state, _, err := testHandshake(clientConfig, serverConfig)
+	state, _, err := testHandshake(t, clientConfig, serverConfig)
 	if err != nil {
 		t.Fatalf("handshake failed: %s", err)
 	}
@@ -370,7 +373,7 @@ func TestCipherSuitePreference(t *testing.T) {
 	}
 
 	serverConfig.PreferServerCipherSuites = true
-	state, _, err = testHandshake(clientConfig, serverConfig)
+	state, _, err = testHandshake(t, clientConfig, serverConfig)
 	if err != nil {
 		t.Fatalf("handshake failed: %s", err)
 	}
@@ -391,7 +394,7 @@ func TestSCTHandshake(t *testing.T) {
 	clientConfig := &Config{
 		InsecureSkipVerify: true,
 	}
-	_, state, err := testHandshake(clientConfig, serverConfig)
+	_, state, err := testHandshake(t, clientConfig, serverConfig)
 	if err != nil {
 		t.Fatalf("handshake failed: %s", err)
 	}
@@ -420,13 +423,13 @@ func TestCrossVersionResume(t *testing.T) {
 
 	// Establish a session at TLS 1.1.
 	clientConfig.MaxVersion = VersionTLS11
-	_, _, err := testHandshake(clientConfig, serverConfig)
+	_, _, err := testHandshake(t, clientConfig, serverConfig)
 	if err != nil {
 		t.Fatalf("handshake failed: %s", err)
 	}
 
 	// The client session cache now contains a TLS 1.1 session.
-	state, _, err := testHandshake(clientConfig, serverConfig)
+	state, _, err := testHandshake(t, clientConfig, serverConfig)
 	if err != nil {
 		t.Fatalf("handshake failed: %s", err)
 	}
@@ -436,7 +439,7 @@ func TestCrossVersionResume(t *testing.T) {
 
 	// Test that the server will decline to resume at a lower version.
 	clientConfig.MaxVersion = VersionTLS10
-	state, _, err = testHandshake(clientConfig, serverConfig)
+	state, _, err = testHandshake(t, clientConfig, serverConfig)
 	if err != nil {
 		t.Fatalf("handshake failed: %s", err)
 	}
@@ -445,7 +448,7 @@ func TestCrossVersionResume(t *testing.T) {
 	}
 
 	// The client session cache now contains a TLS 1.0 session.
-	state, _, err = testHandshake(clientConfig, serverConfig)
+	state, _, err = testHandshake(t, clientConfig, serverConfig)
 	if err != nil {
 		t.Fatalf("handshake failed: %s", err)
 	}
@@ -455,7 +458,7 @@ func TestCrossVersionResume(t *testing.T) {
 
 	// Test that the server will decline to resume at a higher version.
 	clientConfig.MaxVersion = VersionTLS11
-	state, _, err = testHandshake(clientConfig, serverConfig)
+	state, _, err = testHandshake(t, clientConfig, serverConfig)
 	if err != nil {
 		t.Fatalf("handshake failed: %s", err)
 	}
@@ -579,7 +582,7 @@ func (test *serverTest) run(t *testing.T, write bool) {
 		}
 		serverConn = recordingConn
 	} else {
-		clientConn, serverConn = net.Pipe()
+		clientConn, serverConn = localPipe(t)
 	}
 	config := test.config
 	if config == nil {
@@ -832,7 +835,7 @@ func TestHandshakeServerSNIGetCertificate(t *testing.T) {
 	nameToCert := config.NameToCertificate
 	config.NameToCertificate = nil
 	config.GetCertificate = func(clientHello *ClientHelloInfo) (*Certificate, error) {
-		cert, _ := nameToCert[clientHello.ServerName]
+		cert := nameToCert[clientHello.ServerName]
 		return cert, nil
 	}
 	test := &serverTest{
@@ -1025,7 +1028,7 @@ func benchmarkHandshakeServer(b *testing.B, cipherSuite uint16, curve CurveID, c
 	config.Certificates[0].PrivateKey = key
 	config.BuildNameToCertificate()
 
-	clientConn, serverConn := net.Pipe()
+	clientConn, serverConn := localPipe(b)
 	serverConn = &recordingConn{Conn: serverConn}
 	go func() {
 		client := Client(clientConn, testConfig)
@@ -1039,7 +1042,7 @@ func benchmarkHandshakeServer(b *testing.B, cipherSuite uint16, curve CurveID, c
 	flows := serverConn.(*recordingConn).flows
 
 	feeder := make(chan struct{})
-	clientConn, serverConn = net.Pipe()
+	clientConn, serverConn = localPipe(b)
 
 	go func() {
 		for range feeder {
@@ -1051,10 +1054,10 @@ func benchmarkHandshakeServer(b *testing.B, cipherSuite uint16, curve CurveID, c
 				ff := make([]byte, len(f))
 				n, err := io.ReadFull(clientConn, ff)
 				if err != nil {
-					b.Fatalf("#%d: %s\nRead %d, wanted %d, got %x, wanted %x\n", i+1, err, n, len(ff), ff[:n], f)
+					b.Errorf("#%d: %s\nRead %d, wanted %d, got %x, wanted %x\n", i+1, err, n, len(ff), ff[:n], f)
 				}
 				if !bytes.Equal(f, ff) {
-					b.Fatalf("#%d: mismatch on read: got:%x want:%x", i+1, ff, f)
+					b.Errorf("#%d: mismatch on read: got:%x want:%x", i+1, ff, f)
 				}
 			}
 		}
@@ -1216,7 +1219,7 @@ func TestSNIGivenOnFailure(t *testing.T) {
 	// Erase the server's cipher suites to ensure the handshake fails.
 	serverConfig.CipherSuites = nil
 
-	c, s := net.Pipe()
+	c, s := localPipe(t)
 	go func() {
 		cli := Client(c, testConfig)
 		cli.vers = clientHello.vers
@@ -1346,7 +1349,7 @@ func TestGetConfigForClient(t *testing.T) {
 			configReturned = config
 			return config, err
 		}
-		c, s := net.Pipe()
+		c, s := localPipe(t)
 		done := make(chan error)
 
 		go func() {
@@ -1423,7 +1426,7 @@ var testECDSAPrivateKey = &ecdsa.PrivateKey{
 var testP256PrivateKey, _ = x509.ParseECPrivateKey(fromHex("30770201010420012f3b52bc54c36ba3577ad45034e2e8efe1e6999851284cb848725cfe029991a00a06082a8648ce3d030107a14403420004c02c61c9b16283bbcc14956d886d79b358aa614596975f78cece787146abf74c2d5dc578c0992b4f3c631373479ebf3892efe53d21c4f4f1cc9a11c3536b7f75"))
 
 func TestCloseServerConnectionOnIdleClient(t *testing.T) {
-	clientConn, serverConn := net.Pipe()
+	clientConn, serverConn := localPipe(t)
 	server := Server(serverConn, testConfig.Clone())
 	go func() {
 		clientConn.Write([]byte{'0'})
@@ -1432,8 +1435,8 @@ func TestCloseServerConnectionOnIdleClient(t *testing.T) {
 	server.SetReadDeadline(time.Now().Add(time.Second))
 	err := server.Handshake()
 	if err != nil {
-		if !strings.Contains(err.Error(), "read/write on closed pipe") {
-			t.Errorf("Error expected containing 'read/write on closed pipe' but got '%s'", err.Error())
+		if err, ok := err.(net.Error); ok && err.Timeout() {
+			t.Errorf("Expected a closed network connection error but got '%s'", err.Error())
 		}
 	} else {
 		t.Errorf("Error expected, but no error returned")
diff --git a/src/crypto/tls/handshake_test.go b/src/crypto/tls/handshake_test.go
index 4b3fa238f4..18d4624543 100644
--- a/src/crypto/tls/handshake_test.go
+++ b/src/crypto/tls/handshake_test.go
@@ -13,6 +13,7 @@ import (
 	"io"
 	"io/ioutil"
 	"net"
+	"os"
 	"os/exec"
 	"strconv"
 	"strings"
@@ -224,3 +225,45 @@ func tempFile(contents string) string {
 	file.Close()
 	return path
 }
+
+// localListener is set up by TestMain and used by localPipe to create Conn
+// pairs like net.Pipe, but connected by an actual buffered TCP connection.
+var localListener struct {
+	sync.Mutex
+	net.Listener
+}
+
+func localPipe(t testing.TB) (net.Conn, net.Conn) {
+	localListener.Lock()
+	defer localListener.Unlock()
+	c := make(chan net.Conn)
+	go func() {
+		conn, err := localListener.Accept()
+		if err != nil {
+			t.Errorf("Failed to accept local connection: %v", err)
+		}
+		c <- conn
+	}()
+	addr := localListener.Addr()
+	c1, err := net.Dial(addr.Network(), addr.String())
+	if err != nil {
+		t.Fatalf("Failed to dial local connection: %v", err)
+	}
+	c2 := <-c
+	return c1, c2
+}
+
+func TestMain(m *testing.M) {
+	l, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		l, err = net.Listen("tcp6", "[::1]:0")
+	}
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to open local listener: %v", err)
+		os.Exit(1)
+	}
+	localListener.Listener = l
+	exitCode := m.Run()
+	localListener.Close()
+	os.Exit(exitCode)
+}

From 38df4c177b06441b40ac707f1eede49488da2396 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= 
Date: Fri, 28 Sep 2018 16:15:13 +0200
Subject: [PATCH 188/240] cmd/internal/xcoff: add new debug package for cmd

This commit adds a new package in cmd/internal which aims
to debug and load XCOFF files.

Updates: #25893, #28037

Change-Id: I47db495bedfa43e9129a831b9b8bbc35b703567b
Reviewed-on: https://go-review.googlesource.com/c/138727
Run-TryBot: Tobias Klauser 
TryBot-Result: Gobot Gobot 
Reviewed-by: Ian Lance Taylor 
---
 misc/nacl/testzip.proto                       |   3 +
 src/cmd/internal/xcoff/file.go                | 687 ++++++++++++++++++
 src/cmd/internal/xcoff/file_test.go           | 102 +++
 .../xcoff/testdata/gcc-ppc32-aix-dwarf2-exec  | Bin 0 -> 54694 bytes
 .../xcoff/testdata/gcc-ppc64-aix-dwarf2-exec  | Bin 0 -> 57152 bytes
 src/cmd/internal/xcoff/testdata/hello.c       |   7 +
 src/cmd/internal/xcoff/xcoff.go               | 367 ++++++++++
 7 files changed, 1166 insertions(+)
 create mode 100644 src/cmd/internal/xcoff/file.go
 create mode 100644 src/cmd/internal/xcoff/file_test.go
 create mode 100644 src/cmd/internal/xcoff/testdata/gcc-ppc32-aix-dwarf2-exec
 create mode 100644 src/cmd/internal/xcoff/testdata/gcc-ppc64-aix-dwarf2-exec
 create mode 100644 src/cmd/internal/xcoff/testdata/hello.c
 create mode 100644 src/cmd/internal/xcoff/xcoff.go

diff --git a/misc/nacl/testzip.proto b/misc/nacl/testzip.proto
index 1e9279e4e0..5a6a5f43b2 100644
--- a/misc/nacl/testzip.proto
+++ b/misc/nacl/testzip.proto
@@ -37,6 +37,9 @@ go	src=..
 				buildid
 					testdata
 						+
+				xcoff
+					testdata
+						+
 			gofmt
 				gofmt.go
 				gofmt_test.go
diff --git a/src/cmd/internal/xcoff/file.go b/src/cmd/internal/xcoff/file.go
new file mode 100644
index 0000000000..86a85c388c
--- /dev/null
+++ b/src/cmd/internal/xcoff/file.go
@@ -0,0 +1,687 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package xcoff implements access to XCOFF (Extended Common Object File Format) files.
+package xcoff
+
+import (
+	"debug/dwarf"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+// SectionHeader holds information about an XCOFF section header.
+type SectionHeader struct {
+	Name           string
+	VirtualAddress uint64
+	Size           uint64
+	Type           uint32
+	Relptr         uint64
+	Nreloc         uint32
+}
+
+type Section struct {
+	SectionHeader
+	Relocs []Reloc
+	io.ReaderAt
+	sr *io.SectionReader
+}
+
+// AuxiliaryCSect holds information about an XCOFF symbol in an AUX_CSECT entry.
+type AuxiliaryCSect struct {
+	Length              int64
+	StorageMappingClass int
+	SymbolType          int
+}
+
+// AuxiliaryFcn holds information about an XCOFF symbol in an AUX_FCN entry.
+type AuxiliaryFcn struct {
+	Size int64
+}
+
+type Symbol struct {
+	Name          string
+	Value         uint64
+	SectionNumber int
+	StorageClass  int
+	AuxFcn        AuxiliaryFcn
+	AuxCSect      AuxiliaryCSect
+}
+
+type Reloc struct {
+	VirtualAddress   uint64
+	Symbol           *Symbol
+	Signed           bool
+	InstructionFixed bool
+	Length           uint8
+	Type             uint8
+}
+
+// ImportedSymbol holds information about an imported XCOFF symbol.
+type ImportedSymbol struct {
+	Name    string
+	Library string
+}
+
+// FileHeader holds information about an XCOFF file header.
+type FileHeader struct {
+	TargetMachine uint16
+}
+
+// A File represents an open XCOFF file.
+type File struct {
+	FileHeader
+	Sections     []*Section
+	Symbols      []*Symbol
+	StringTable  []byte
+	LibraryPaths []string
+
+	closer io.Closer
+}
+
+// Open opens the named file using os.Open and prepares it for use as an XCOFF binary.
+func Open(name string) (*File, error) {
+	f, err := os.Open(name)
+	if err != nil {
+		return nil, err
+	}
+	ff, err := NewFile(f)
+	if err != nil {
+		f.Close()
+		return nil, err
+	}
+	ff.closer = f
+	return ff, nil
+}
+
+// Close closes the File.
+// If the File was created using NewFile directly instead of Open,
+// Close has no effect.
+func (f *File) Close() error {
+	var err error
+	if f.closer != nil {
+		err = f.closer.Close()
+		f.closer = nil
+	}
+	return err
+}
+
+// Section returns the first section with the given name, or nil if no such
+// section exists.
+// Xcoff have section's name limited to 8 bytes. Some sections like .gosymtab
+// can be trunked but this method will still find them.
+func (f *File) Section(name string) *Section {
+	for _, s := range f.Sections {
+		if s.Name == name || (len(name) > 8 && s.Name == name[:8]) {
+			return s
+		}
+	}
+	return nil
+}
+
+// SectionByType returns the first section in f with the
+// given type, or nil if there is no such section.
+func (f *File) SectionByType(typ uint32) *Section {
+	for _, s := range f.Sections {
+		if s.Type == typ {
+			return s
+		}
+	}
+	return nil
+}
+
+// cstring converts ASCII byte sequence b to string.
+// It stops once it finds 0 or reaches end of b.
+func cstring(b []byte) string {
+	var i int
+	for i = 0; i < len(b) && b[i] != 0; i++ {
+	}
+	return string(b[:i])
+}
+
+// getString extracts a string from an XCOFF string table.
+func getString(st []byte, offset uint32) (string, bool) {
+	if offset < 4 || int(offset) >= len(st) {
+		return "", false
+	}
+	return cstring(st[offset:]), true
+}
+
+// NewFile creates a new File for accessing an XCOFF binary in an underlying reader.
+func NewFile(r io.ReaderAt) (*File, error) {
+	sr := io.NewSectionReader(r, 0, 1<<63-1)
+	// Read XCOFF target machine
+	var magic uint16
+	if err := binary.Read(sr, binary.BigEndian, &magic); err != nil {
+		return nil, err
+	}
+	if magic != U802TOCMAGIC && magic != U64_TOCMAGIC {
+		return nil, fmt.Errorf("unrecognised XCOFF magic: 0x%x", magic)
+	}
+
+	f := new(File)
+	f.TargetMachine = magic
+
+	// Read XCOFF file header
+	if _, err := sr.Seek(0, os.SEEK_SET); err != nil {
+		return nil, err
+	}
+	var nscns uint16
+	var symptr uint64
+	var nsyms int32
+	var opthdr uint16
+	var hdrsz int
+	switch f.TargetMachine {
+	case U802TOCMAGIC:
+		fhdr := new(FileHeader32)
+		if err := binary.Read(sr, binary.BigEndian, fhdr); err != nil {
+			return nil, err
+		}
+		nscns = fhdr.Fnscns
+		symptr = uint64(fhdr.Fsymptr)
+		nsyms = fhdr.Fnsyms
+		opthdr = fhdr.Fopthdr
+		hdrsz = FILHSZ_32
+	case U64_TOCMAGIC:
+		fhdr := new(FileHeader64)
+		if err := binary.Read(sr, binary.BigEndian, fhdr); err != nil {
+			return nil, err
+		}
+		nscns = fhdr.Fnscns
+		symptr = fhdr.Fsymptr
+		nsyms = fhdr.Fnsyms
+		opthdr = fhdr.Fopthdr
+		hdrsz = FILHSZ_64
+	}
+
+	if symptr == 0 || nsyms <= 0 {
+		return nil, fmt.Errorf("no symbol table")
+	}
+
+	// Read string table (located right after symbol table).
+	offset := symptr + uint64(nsyms)*SYMESZ
+	if _, err := sr.Seek(int64(offset), os.SEEK_SET); err != nil {
+		return nil, err
+	}
+	// The first 4 bytes contain the length (in bytes).
+	var l uint32
+	if err := binary.Read(sr, binary.BigEndian, &l); err != nil {
+		return nil, err
+	}
+	if l > 4 {
+		if _, err := sr.Seek(int64(offset), os.SEEK_SET); err != nil {
+			return nil, err
+		}
+		f.StringTable = make([]byte, l)
+		if _, err := io.ReadFull(sr, f.StringTable); err != nil {
+			return nil, err
+		}
+	}
+
+	// Read section headers
+	if _, err := sr.Seek(int64(hdrsz)+int64(opthdr), os.SEEK_SET); err != nil {
+		return nil, err
+	}
+	f.Sections = make([]*Section, nscns)
+	for i := 0; i < int(nscns); i++ {
+		var scnptr uint64
+		s := new(Section)
+		switch f.TargetMachine {
+		case U802TOCMAGIC:
+			shdr := new(SectionHeader32)
+			if err := binary.Read(sr, binary.BigEndian, shdr); err != nil {
+				return nil, err
+			}
+			s.Name = cstring(shdr.Sname[:])
+			s.VirtualAddress = uint64(shdr.Svaddr)
+			s.Size = uint64(shdr.Ssize)
+			scnptr = uint64(shdr.Sscnptr)
+			s.Type = shdr.Sflags
+			s.Relptr = uint64(shdr.Srelptr)
+			s.Nreloc = uint32(shdr.Snreloc)
+		case U64_TOCMAGIC:
+			shdr := new(SectionHeader64)
+			if err := binary.Read(sr, binary.BigEndian, shdr); err != nil {
+				return nil, err
+			}
+			s.Name = cstring(shdr.Sname[:])
+			s.VirtualAddress = shdr.Svaddr
+			s.Size = shdr.Ssize
+			scnptr = shdr.Sscnptr
+			s.Type = shdr.Sflags
+			s.Relptr = shdr.Srelptr
+			s.Nreloc = shdr.Snreloc
+		}
+		r2 := r
+		if scnptr == 0 { // .bss must have all 0s
+			r2 = zeroReaderAt{}
+		}
+		s.sr = io.NewSectionReader(r2, int64(scnptr), int64(s.Size))
+		s.ReaderAt = s.sr
+		f.Sections[i] = s
+	}
+
+	// Symbol map needed by relocation
+	var idxToSym = make(map[int]*Symbol)
+
+	// Read symbol table
+	if _, err := sr.Seek(int64(symptr), os.SEEK_SET); err != nil {
+		return nil, err
+	}
+	f.Symbols = make([]*Symbol, 0)
+	for i := 0; i < int(nsyms); i++ {
+		var numaux int
+		var ok, needAuxFcn bool
+		sym := new(Symbol)
+		switch f.TargetMachine {
+		case U802TOCMAGIC:
+			se := new(SymEnt32)
+			if err := binary.Read(sr, binary.BigEndian, se); err != nil {
+				return nil, err
+			}
+			numaux = int(se.Nnumaux)
+			sym.SectionNumber = int(se.Nscnum)
+			sym.StorageClass = int(se.Nsclass)
+			sym.Value = uint64(se.Nvalue)
+			needAuxFcn = se.Ntype&SYM_TYPE_FUNC != 0 && numaux > 1
+			zeroes := binary.BigEndian.Uint32(se.Nname[:4])
+			if zeroes != 0 {
+				sym.Name = cstring(se.Nname[:])
+			} else {
+				offset := binary.BigEndian.Uint32(se.Nname[4:])
+				sym.Name, ok = getString(f.StringTable, offset)
+				if !ok {
+					goto skip
+				}
+			}
+		case U64_TOCMAGIC:
+			se := new(SymEnt64)
+			if err := binary.Read(sr, binary.BigEndian, se); err != nil {
+				return nil, err
+			}
+			numaux = int(se.Nnumaux)
+			sym.SectionNumber = int(se.Nscnum)
+			sym.StorageClass = int(se.Nsclass)
+			sym.Value = se.Nvalue
+			needAuxFcn = se.Ntype&SYM_TYPE_FUNC != 0 && numaux > 1
+			sym.Name, ok = getString(f.StringTable, se.Noffset)
+			if !ok {
+				goto skip
+			}
+		}
+		if sym.StorageClass != C_EXT && sym.StorageClass != C_WEAKEXT && sym.StorageClass != C_HIDEXT {
+			goto skip
+		}
+		// Must have at least one csect auxiliary entry.
+		if numaux < 1 || i+numaux >= int(nsyms) {
+			goto skip
+		}
+
+		if sym.SectionNumber > int(nscns) {
+			goto skip
+		}
+		if sym.SectionNumber == 0 {
+			sym.Value = 0
+		} else {
+			sym.Value -= f.Sections[sym.SectionNumber-1].VirtualAddress
+		}
+
+		idxToSym[i] = sym
+
+		// If this symbol is a function, it must retrieve its size from
+		// its AUX_FCN entry.
+		// It can happend that a function symbol doesn't have any AUX_FCN.
+		// In this case, needAuxFcn is false and their size will be set to 0
+		if needAuxFcn {
+			switch f.TargetMachine {
+			case U802TOCMAGIC:
+				aux := new(AuxFcn32)
+				if err := binary.Read(sr, binary.BigEndian, aux); err != nil {
+					return nil, err
+				}
+				sym.AuxFcn.Size = int64(aux.Xfsize)
+			case U64_TOCMAGIC:
+				aux := new(AuxFcn64)
+				if err := binary.Read(sr, binary.BigEndian, aux); err != nil {
+					return nil, err
+				}
+				sym.AuxFcn.Size = int64(aux.Xfsize)
+			}
+		}
+
+		// Read csect auxiliary entry (by convention, it is the last).
+		if !needAuxFcn {
+			if _, err := sr.Seek(int64(numaux-1)*SYMESZ, io.SeekCurrent); err != nil {
+				return nil, err
+			}
+		}
+		i += numaux
+		numaux = 0
+		switch f.TargetMachine {
+		case U802TOCMAGIC:
+			aux := new(AuxCSect32)
+			if err := binary.Read(sr, binary.BigEndian, aux); err != nil {
+				return nil, err
+			}
+			sym.AuxCSect.SymbolType = int(aux.Xsmtyp & 0x7)
+			sym.AuxCSect.StorageMappingClass = int(aux.Xsmclas)
+			sym.AuxCSect.Length = int64(aux.Xscnlen)
+		case U64_TOCMAGIC:
+			aux := new(AuxCSect64)
+			if err := binary.Read(sr, binary.BigEndian, aux); err != nil {
+				return nil, err
+			}
+			sym.AuxCSect.SymbolType = int(aux.Xsmtyp & 0x7)
+			sym.AuxCSect.StorageMappingClass = int(aux.Xsmclas)
+			sym.AuxCSect.Length = int64(aux.Xscnlenhi)<<32 | int64(aux.Xscnlenlo)
+		}
+		f.Symbols = append(f.Symbols, sym)
+	skip:
+		i += numaux // Skip auxiliary entries
+		if _, err := sr.Seek(int64(numaux)*SYMESZ, io.SeekCurrent); err != nil {
+			return nil, err
+		}
+	}
+
+	// Read relocations
+	// Only for .data or .text section
+	for _, sect := range f.Sections {
+		if sect.Type != STYP_TEXT && sect.Type != STYP_DATA {
+			continue
+		}
+		sect.Relocs = make([]Reloc, sect.Nreloc)
+		if sect.Relptr == 0 {
+			continue
+		}
+		if _, err := sr.Seek(int64(sect.Relptr), os.SEEK_SET); err != nil {
+			return nil, err
+		}
+		for i := uint32(0); i < sect.Nreloc; i++ {
+			switch f.TargetMachine {
+			case U802TOCMAGIC:
+				rel := new(Reloc32)
+				if err := binary.Read(sr, binary.BigEndian, rel); err != nil {
+					return nil, err
+				}
+				sect.Relocs[i].VirtualAddress = uint64(rel.Rvaddr)
+				sect.Relocs[i].Symbol = idxToSym[int(rel.Rsymndx)]
+				sect.Relocs[i].Type = rel.Rtype
+				sect.Relocs[i].Length = rel.Rsize&0x3F + 1
+
+				if rel.Rsize&0x80 == 1 {
+					sect.Relocs[i].Signed = true
+				}
+				if rel.Rsize&0x40 == 1 {
+					sect.Relocs[i].InstructionFixed = true
+				}
+
+			case U64_TOCMAGIC:
+				rel := new(Reloc64)
+				if err := binary.Read(sr, binary.BigEndian, rel); err != nil {
+					return nil, err
+				}
+				sect.Relocs[i].VirtualAddress = rel.Rvaddr
+				sect.Relocs[i].Symbol = idxToSym[int(rel.Rsymndx)]
+				sect.Relocs[i].Type = rel.Rtype
+				sect.Relocs[i].Length = rel.Rsize&0x3F + 1
+				if rel.Rsize&0x80 == 1 {
+					sect.Relocs[i].Signed = true
+				}
+				if rel.Rsize&0x40 == 1 {
+					sect.Relocs[i].InstructionFixed = true
+				}
+			}
+		}
+	}
+
+	return f, nil
+}
+
+// zeroReaderAt is ReaderAt that reads 0s.
+type zeroReaderAt struct{}
+
+// ReadAt writes len(p) 0s into p.
+func (w zeroReaderAt) ReadAt(p []byte, off int64) (n int, err error) {
+	for i := range p {
+		p[i] = 0
+	}
+	return len(p), nil
+}
+
+// Data reads and returns the contents of the XCOFF section s.
+func (s *Section) Data() ([]byte, error) {
+	dat := make([]byte, s.sr.Size())
+	n, err := s.sr.ReadAt(dat, 0)
+	if n == len(dat) {
+		err = nil
+	}
+	return dat[:n], err
+}
+
+// CSect reads and returns the contents of a csect.
+func (f *File) CSect(name string) []byte {
+	for _, sym := range f.Symbols {
+		if sym.Name == name && sym.AuxCSect.SymbolType == XTY_SD {
+			if i := sym.SectionNumber - 1; 0 <= i && i < len(f.Sections) {
+				s := f.Sections[i]
+				if sym.Value+uint64(sym.AuxCSect.Length) <= s.Size {
+					dat := make([]byte, sym.AuxCSect.Length)
+					_, err := s.sr.ReadAt(dat, int64(sym.Value))
+					if err != nil {
+						return nil
+					}
+					return dat
+				}
+			}
+			break
+		}
+	}
+	return nil
+}
+
+func (f *File) DWARF() (*dwarf.Data, error) {
+	// There are many other DWARF sections, but these
+	// are the ones the debug/dwarf package uses.
+	// Don't bother loading others.
+	var subtypes = [...]uint32{SSUBTYP_DWABREV, SSUBTYP_DWINFO, SSUBTYP_DWLINE, SSUBTYP_DWRNGES, SSUBTYP_DWSTR}
+	var dat [len(subtypes)][]byte
+	for i, subtype := range subtypes {
+		s := f.SectionByType(STYP_DWARF | subtype)
+		if s != nil {
+			b, err := s.Data()
+			if err != nil && uint64(len(b)) < s.Size {
+				return nil, err
+			}
+			dat[i] = b
+		}
+	}
+
+	abbrev, info, line, ranges, str := dat[0], dat[1], dat[2], dat[3], dat[4]
+	return dwarf.New(abbrev, nil, nil, info, line, nil, ranges, str)
+}
+
+// readImportID returns the import file IDs stored inside the .loader section.
+// Library name pattern is either path/base/member or base/member
+func (f *File) readImportIDs(s *Section) ([]string, error) {
+	// Read loader header
+	if _, err := s.sr.Seek(0, os.SEEK_SET); err != nil {
+		return nil, err
+	}
+	var istlen uint32
+	var nimpid int32
+	var impoff uint64
+	switch f.TargetMachine {
+	case U802TOCMAGIC:
+		lhdr := new(LoaderHeader32)
+		if err := binary.Read(s.sr, binary.BigEndian, lhdr); err != nil {
+			return nil, err
+		}
+		istlen = lhdr.Listlen
+		nimpid = lhdr.Lnimpid
+		impoff = uint64(lhdr.Limpoff)
+	case U64_TOCMAGIC:
+		lhdr := new(LoaderHeader64)
+		if err := binary.Read(s.sr, binary.BigEndian, lhdr); err != nil {
+			return nil, err
+		}
+		istlen = lhdr.Listlen
+		nimpid = lhdr.Lnimpid
+		impoff = lhdr.Limpoff
+	}
+
+	// Read loader import file ID table
+	if _, err := s.sr.Seek(int64(impoff), os.SEEK_SET); err != nil {
+		return nil, err
+	}
+	table := make([]byte, istlen)
+	if _, err := io.ReadFull(s.sr, table); err != nil {
+		return nil, err
+	}
+
+	offset := 0
+	// First import file ID is the default LIBPATH value
+	libpath := cstring(table[offset:])
+	f.LibraryPaths = strings.Split(libpath, ":")
+	offset += len(libpath) + 3 // 3 null bytes
+	all := make([]string, 0)
+	for i := 1; i < int(nimpid); i++ {
+		impidpath := cstring(table[offset:])
+		offset += len(impidpath) + 1
+		impidbase := cstring(table[offset:])
+		offset += len(impidbase) + 1
+		impidmem := cstring(table[offset:])
+		offset += len(impidmem) + 1
+		var path string
+		if len(impidpath) > 0 {
+			path = impidpath + "/" + impidbase + "/" + impidmem
+		} else {
+			path = impidbase + "/" + impidmem
+		}
+		all = append(all, path)
+	}
+
+	return all, nil
+}
+
+// ImportedSymbols returns the names of all symbols
+// referred to by the binary f that are expected to be
+// satisfied by other libraries at dynamic load time.
+// It does not return weak symbols.
+func (f *File) ImportedSymbols() ([]ImportedSymbol, error) {
+	s := f.SectionByType(STYP_LOADER)
+	if s == nil {
+		return nil, nil
+	}
+	// Read loader header
+	if _, err := s.sr.Seek(0, os.SEEK_SET); err != nil {
+		return nil, err
+	}
+	var stlen uint32
+	var stoff uint64
+	var nsyms int32
+	var symoff uint64
+	switch f.TargetMachine {
+	case U802TOCMAGIC:
+		lhdr := new(LoaderHeader32)
+		if err := binary.Read(s.sr, binary.BigEndian, lhdr); err != nil {
+			return nil, err
+		}
+		stlen = lhdr.Lstlen
+		stoff = uint64(lhdr.Lstoff)
+		nsyms = lhdr.Lnsyms
+		symoff = LDHDRSZ_32
+	case U64_TOCMAGIC:
+		lhdr := new(LoaderHeader64)
+		if err := binary.Read(s.sr, binary.BigEndian, lhdr); err != nil {
+			return nil, err
+		}
+		stlen = lhdr.Lstlen
+		stoff = lhdr.Lstoff
+		nsyms = lhdr.Lnsyms
+		symoff = lhdr.Lsymoff
+	}
+
+	// Read loader section string table
+	if _, err := s.sr.Seek(int64(stoff), os.SEEK_SET); err != nil {
+		return nil, err
+	}
+	st := make([]byte, stlen)
+	if _, err := io.ReadFull(s.sr, st); err != nil {
+		return nil, err
+	}
+
+	// Read imported libraries
+	libs, err := f.readImportIDs(s)
+	if err != nil {
+		return nil, err
+	}
+
+	// Read loader symbol table
+	if _, err := s.sr.Seek(int64(symoff), os.SEEK_SET); err != nil {
+		return nil, err
+	}
+	all := make([]ImportedSymbol, 0)
+	for i := 0; i < int(nsyms); i++ {
+		var name string
+		var ifile int32
+		var ok bool
+		switch f.TargetMachine {
+		case U802TOCMAGIC:
+			ldsym := new(LoaderSymbol32)
+			if err := binary.Read(s.sr, binary.BigEndian, ldsym); err != nil {
+				return nil, err
+			}
+			if ldsym.Lsmtype&0x40 == 0 {
+				continue // Imported symbols only
+			}
+			zeroes := binary.BigEndian.Uint32(ldsym.Lname[:4])
+			if zeroes != 0 {
+				name = cstring(ldsym.Lname[:])
+			} else {
+				offset := binary.BigEndian.Uint32(ldsym.Lname[4:])
+				name, ok = getString(st, offset)
+				if !ok {
+					continue
+				}
+			}
+			ifile = ldsym.Lifile
+		case U64_TOCMAGIC:
+			ldsym := new(LoaderSymbol64)
+			if err := binary.Read(s.sr, binary.BigEndian, ldsym); err != nil {
+				return nil, err
+			}
+			if ldsym.Lsmtype&0x40 == 0 {
+				continue // Imported symbols only
+			}
+			name, ok = getString(st, ldsym.Loffset)
+			if !ok {
+				continue
+			}
+			ifile = ldsym.Lifile
+		}
+		var sym ImportedSymbol
+		sym.Name = name
+		if ifile >= 1 && int(ifile) <= len(libs) {
+			sym.Library = libs[ifile-1]
+		}
+		all = append(all, sym)
+	}
+
+	return all, nil
+}
+
+// ImportedLibraries returns the names of all libraries
+// referred to by the binary f that are expected to be
+// linked with the binary at dynamic link time.
+func (f *File) ImportedLibraries() ([]string, error) {
+	s := f.SectionByType(STYP_LOADER)
+	if s == nil {
+		return nil, nil
+	}
+	all, err := f.readImportIDs(s)
+	return all, err
+}
diff --git a/src/cmd/internal/xcoff/file_test.go b/src/cmd/internal/xcoff/file_test.go
new file mode 100644
index 0000000000..a6722e9453
--- /dev/null
+++ b/src/cmd/internal/xcoff/file_test.go
@@ -0,0 +1,102 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package xcoff
+
+import (
+	"reflect"
+	"testing"
+)
+
+type fileTest struct {
+	file     string
+	hdr      FileHeader
+	sections []*SectionHeader
+	needed   []string
+}
+
+var fileTests = []fileTest{
+	{
+		"testdata/gcc-ppc32-aix-dwarf2-exec",
+		FileHeader{U802TOCMAGIC},
+		[]*SectionHeader{
+			{".text", 0x10000290, 0x00000bbd, STYP_TEXT, 0x7ae6, 0x36},
+			{".data", 0x20000e4d, 0x00000437, STYP_DATA, 0x7d02, 0x2b},
+			{".bss", 0x20001284, 0x0000021c, STYP_BSS, 0, 0},
+			{".loader", 0x00000000, 0x000004b3, STYP_LOADER, 0, 0},
+			{".dwline", 0x00000000, 0x000000df, STYP_DWARF | SSUBTYP_DWLINE, 0x7eb0, 0x7},
+			{".dwinfo", 0x00000000, 0x00000314, STYP_DWARF | SSUBTYP_DWINFO, 0x7ef6, 0xa},
+			{".dwabrev", 0x00000000, 0x000000d6, STYP_DWARF | SSUBTYP_DWABREV, 0, 0},
+			{".dwarnge", 0x00000000, 0x00000020, STYP_DWARF | SSUBTYP_DWARNGE, 0x7f5a, 0x2},
+			{".dwloc", 0x00000000, 0x00000074, STYP_DWARF | SSUBTYP_DWLOC, 0, 0},
+			{".debug", 0x00000000, 0x00005e4f, STYP_DEBUG, 0, 0},
+		},
+		[]string{"libc.a/shr.o"},
+	},
+	{
+		"testdata/gcc-ppc64-aix-dwarf2-exec",
+		FileHeader{U64_TOCMAGIC},
+		[]*SectionHeader{
+			{".text", 0x10000480, 0x00000afd, STYP_TEXT, 0x8322, 0x34},
+			{".data", 0x20000f7d, 0x000002f3, STYP_DATA, 0x85fa, 0x25},
+			{".bss", 0x20001270, 0x00000428, STYP_BSS, 0, 0},
+			{".loader", 0x00000000, 0x00000535, STYP_LOADER, 0, 0},
+			{".dwline", 0x00000000, 0x000000b4, STYP_DWARF | SSUBTYP_DWLINE, 0x8800, 0x4},
+			{".dwinfo", 0x00000000, 0x0000036a, STYP_DWARF | SSUBTYP_DWINFO, 0x8838, 0x7},
+			{".dwabrev", 0x00000000, 0x000000b5, STYP_DWARF | SSUBTYP_DWABREV, 0, 0},
+			{".dwarnge", 0x00000000, 0x00000040, STYP_DWARF | SSUBTYP_DWARNGE, 0x889a, 0x2},
+			{".dwloc", 0x00000000, 0x00000062, STYP_DWARF | SSUBTYP_DWLOC, 0, 0},
+			{".debug", 0x00000000, 0x00006605, STYP_DEBUG, 0, 0},
+		},
+		[]string{"libc.a/shr_64.o"},
+	},
+}
+
+func TestOpen(t *testing.T) {
+	for i := range fileTests {
+		tt := &fileTests[i]
+
+		f, err := Open(tt.file)
+		if err != nil {
+			t.Error(err)
+			continue
+		}
+		if !reflect.DeepEqual(f.FileHeader, tt.hdr) {
+			t.Errorf("open %s:\n\thave %#v\n\twant %#v\n", tt.file, f.FileHeader, tt.hdr)
+			continue
+		}
+
+		for i, sh := range f.Sections {
+			if i >= len(tt.sections) {
+				break
+			}
+			have := &sh.SectionHeader
+			want := tt.sections[i]
+			if !reflect.DeepEqual(have, want) {
+				t.Errorf("open %s, section %d:\n\thave %#v\n\twant %#v\n", tt.file, i, have, want)
+			}
+		}
+		tn := len(tt.sections)
+		fn := len(f.Sections)
+		if tn != fn {
+			t.Errorf("open %s: len(Sections) = %d, want %d", tt.file, fn, tn)
+		}
+		tl := tt.needed
+		fl, err := f.ImportedLibraries()
+		if err != nil {
+			t.Error(err)
+		}
+		if !reflect.DeepEqual(tl, fl) {
+			t.Errorf("open %s: loader import = %v, want %v", tt.file, tl, fl)
+		}
+	}
+}
+
+func TestOpenFailure(t *testing.T) {
+	filename := "file.go"    // not an XCOFF object file
+	_, err := Open(filename) // don't crash
+	if err == nil {
+		t.Errorf("open %s: succeeded unexpectedly", filename)
+	}
+}
diff --git a/src/cmd/internal/xcoff/testdata/gcc-ppc32-aix-dwarf2-exec b/src/cmd/internal/xcoff/testdata/gcc-ppc32-aix-dwarf2-exec
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diff --git a/src/cmd/internal/xcoff/testdata/gcc-ppc64-aix-dwarf2-exec b/src/cmd/internal/xcoff/testdata/gcc-ppc64-aix-dwarf2-exec
new file mode 100644
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diff --git a/src/cmd/internal/xcoff/testdata/hello.c b/src/cmd/internal/xcoff/testdata/hello.c
new file mode 100644
index 0000000000..34d9ee7923
--- /dev/null
+++ b/src/cmd/internal/xcoff/testdata/hello.c
@@ -0,0 +1,7 @@
+#include 
+
+void
+main(int argc, char *argv[])
+{
+	printf("hello, world\n");
+}
diff --git a/src/cmd/internal/xcoff/xcoff.go b/src/cmd/internal/xcoff/xcoff.go
new file mode 100644
index 0000000000..f8465d7289
--- /dev/null
+++ b/src/cmd/internal/xcoff/xcoff.go
@@ -0,0 +1,367 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package xcoff
+
+// File Header.
+type FileHeader32 struct {
+	Fmagic   uint16 // Target machine
+	Fnscns   uint16 // Number of sections
+	Ftimedat int32  // Time and date of file creation
+	Fsymptr  uint32 // Byte offset to symbol table start
+	Fnsyms   int32  // Number of entries in symbol table
+	Fopthdr  uint16 // Number of bytes in optional header
+	Fflags   uint16 // Flags
+}
+
+type FileHeader64 struct {
+	Fmagic   uint16 // Target machine
+	Fnscns   uint16 // Number of sections
+	Ftimedat int32  // Time and date of file creation
+	Fsymptr  uint64 // Byte offset to symbol table start
+	Fopthdr  uint16 // Number of bytes in optional header
+	Fflags   uint16 // Flags
+	Fnsyms   int32  // Number of entries in symbol table
+}
+
+const (
+	FILHSZ_32 = 20
+	FILHSZ_64 = 24
+)
+const (
+	U802TOCMAGIC = 0737 // AIX 32-bit XCOFF
+	U64_TOCMAGIC = 0767 // AIX 64-bit XCOFF
+)
+
+// Flags that describe the type of the object file.
+const (
+	F_RELFLG    = 0x0001
+	F_EXEC      = 0x0002
+	F_LNNO      = 0x0004
+	F_FDPR_PROF = 0x0010
+	F_FDPR_OPTI = 0x0020
+	F_DSA       = 0x0040
+	F_VARPG     = 0x0100
+	F_DYNLOAD   = 0x1000
+	F_SHROBJ    = 0x2000
+	F_LOADONLY  = 0x4000
+)
+
+// Section Header.
+type SectionHeader32 struct {
+	Sname    [8]byte // Section name
+	Spaddr   uint32  // Physical address
+	Svaddr   uint32  // Virtual address
+	Ssize    uint32  // Section size
+	Sscnptr  uint32  // Offset in file to raw data for section
+	Srelptr  uint32  // Offset in file to relocation entries for section
+	Slnnoptr uint32  // Offset in file to line number entries for section
+	Snreloc  uint16  // Number of relocation entries
+	Snlnno   uint16  // Number of line number entries
+	Sflags   uint32  // Flags to define the section type
+}
+
+type SectionHeader64 struct {
+	Sname    [8]byte // Section name
+	Spaddr   uint64  // Physical address
+	Svaddr   uint64  // Virtual address
+	Ssize    uint64  // Section size
+	Sscnptr  uint64  // Offset in file to raw data for section
+	Srelptr  uint64  // Offset in file to relocation entries for section
+	Slnnoptr uint64  // Offset in file to line number entries for section
+	Snreloc  uint32  // Number of relocation entries
+	Snlnno   uint32  // Number of line number entries
+	Sflags   uint32  // Flags to define the section type
+	Spad     uint32  // Needs to be 72 bytes long
+}
+
+// Flags defining the section type.
+const (
+	STYP_DWARF  = 0x0010
+	STYP_TEXT   = 0x0020
+	STYP_DATA   = 0x0040
+	STYP_BSS    = 0x0080
+	STYP_EXCEPT = 0x0100
+	STYP_INFO   = 0x0200
+	STYP_TDATA  = 0x0400
+	STYP_TBSS   = 0x0800
+	STYP_LOADER = 0x1000
+	STYP_DEBUG  = 0x2000
+	STYP_TYPCHK = 0x4000
+	STYP_OVRFLO = 0x8000
+)
+const (
+	SSUBTYP_DWINFO  = 0x10000 // DWARF info section
+	SSUBTYP_DWLINE  = 0x20000 // DWARF line-number section
+	SSUBTYP_DWPBNMS = 0x30000 // DWARF public names section
+	SSUBTYP_DWPBTYP = 0x40000 // DWARF public types section
+	SSUBTYP_DWARNGE = 0x50000 // DWARF aranges section
+	SSUBTYP_DWABREV = 0x60000 // DWARF abbreviation section
+	SSUBTYP_DWSTR   = 0x70000 // DWARF strings section
+	SSUBTYP_DWRNGES = 0x80000 // DWARF ranges section
+	SSUBTYP_DWLOC   = 0x90000 // DWARF location lists section
+	SSUBTYP_DWFRAME = 0xA0000 // DWARF frames section
+	SSUBTYP_DWMAC   = 0xB0000 // DWARF macros section
+)
+
+// Symbol Table Entry.
+type SymEnt32 struct {
+	Nname   [8]byte // Symbol name
+	Nvalue  uint32  // Symbol value
+	Nscnum  int16   // Section number of symbol
+	Ntype   uint16  // Basic and derived type specification
+	Nsclass int8    // Storage class of symbol
+	Nnumaux int8    // Number of auxiliary entries
+}
+
+type SymEnt64 struct {
+	Nvalue  uint64 // Symbol value
+	Noffset uint32 // Offset of the name in string table or .debug section
+	Nscnum  int16  // Section number of symbol
+	Ntype   uint16 // Basic and derived type specification
+	Nsclass int8   // Storage class of symbol
+	Nnumaux int8   // Number of auxiliary entries
+}
+
+const SYMESZ = 18
+
+const (
+	// Nscnum
+	N_DEBUG = -2
+	N_ABS   = -1
+	N_UNDEF = 0
+
+	//Ntype
+	SYM_V_INTERNAL  = 0x1000
+	SYM_V_HIDDEN    = 0x2000
+	SYM_V_PROTECTED = 0x3000
+	SYM_V_EXPORTED  = 0x4000
+	SYM_TYPE_FUNC   = 0x0020 // is function
+)
+
+// Storage Class.
+const (
+	C_NULL    = 0   // Symbol table entry marked for deletion
+	C_EXT     = 2   // External symbol
+	C_STAT    = 3   // Static symbol
+	C_BLOCK   = 100 // Beginning or end of inner block
+	C_FCN     = 101 // Beginning or end of function
+	C_FILE    = 103 // Source file name and compiler information
+	C_HIDEXT  = 107 // Unnamed external symbol
+	C_BINCL   = 108 // Beginning of include file
+	C_EINCL   = 109 // End of include file
+	C_WEAKEXT = 111 // Weak external symbol
+	C_DWARF   = 112 // DWARF symbol
+	C_GSYM    = 128 // Global variable
+	C_LSYM    = 129 // Automatic variable allocated on stack
+	C_PSYM    = 130 // Argument to subroutine allocated on stack
+	C_RSYM    = 131 // Register variable
+	C_RPSYM   = 132 // Argument to function or procedure stored in register
+	C_STSYM   = 133 // Statically allocated symbol
+	C_BCOMM   = 135 // Beginning of common block
+	C_ECOML   = 136 // Local member of common block
+	C_ECOMM   = 137 // End of common block
+	C_DECL    = 140 // Declaration of object
+	C_ENTRY   = 141 // Alternate entry
+	C_FUN     = 142 // Function or procedure
+	C_BSTAT   = 143 // Beginning of static block
+	C_ESTAT   = 144 // End of static block
+	C_GTLS    = 145 // Global thread-local variable
+	C_STTLS   = 146 // Static thread-local variable
+)
+
+// File Auxiliary Entry
+type AuxFile64 struct {
+	Xfname   [8]byte // Name or offset inside string table
+	Xftype   uint8   // Source file string type
+	Xauxtype uint8   // Type of auxiliary entry
+}
+
+// Function Auxiliary Entry
+type AuxFcn32 struct {
+	Xexptr   uint32 // File offset to exception table entry
+	Xfsize   uint32 // Size of function in bytes
+	Xlnnoptr uint32 // File pointer to line number
+	Xendndx  uint32 // Symbol table index of next entry
+	Xpad     uint16 // Unused
+}
+type AuxFcn64 struct {
+	Xlnnoptr uint64 // File pointer to line number
+	Xfsize   uint32 // Size of function in bytes
+	Xendndx  uint32 // Symbol table index of next entry
+	Xpad     uint8  // Unused
+	Xauxtype uint8  // Type of auxiliary entry
+}
+
+type AuxSect64 struct {
+	Xscnlen  uint64 // section length
+	Xnreloc  uint64 // Num RLDs
+	pad      uint8
+	Xauxtype uint8 // Type of auxiliary entry
+}
+
+// csect Auxiliary Entry.
+type AuxCSect32 struct {
+	Xscnlen   int32  // Length or symbol table index
+	Xparmhash uint32 // Offset of parameter type-check string
+	Xsnhash   uint16 // .typchk section number
+	Xsmtyp    uint8  // Symbol alignment and type
+	Xsmclas   uint8  // Storage-mapping class
+	Xstab     uint32 // Reserved
+	Xsnstab   uint16 // Reserved
+}
+
+type AuxCSect64 struct {
+	Xscnlenlo uint32 // Lower 4 bytes of length or symbol table index
+	Xparmhash uint32 // Offset of parameter type-check string
+	Xsnhash   uint16 // .typchk section number
+	Xsmtyp    uint8  // Symbol alignment and type
+	Xsmclas   uint8  // Storage-mapping class
+	Xscnlenhi int32  // Upper 4 bytes of length or symbol table index
+	Xpad      uint8  // Unused
+	Xauxtype  uint8  // Type of auxiliary entry
+}
+
+// Auxiliary type
+const (
+	_AUX_EXCEPT = 255
+	_AUX_FCN    = 254
+	_AUX_SYM    = 253
+	_AUX_FILE   = 252
+	_AUX_CSECT  = 251
+	_AUX_SECT   = 250
+)
+
+// Symbol type field.
+const (
+	XTY_ER = 0 // External reference
+	XTY_SD = 1 // Section definition
+	XTY_LD = 2 // Label definition
+	XTY_CM = 3 // Common csect definition
+)
+
+// Defines for File auxiliary definitions: x_ftype field of x_file
+const (
+	XFT_FN = 0   // Source File Name
+	XFT_CT = 1   // Compile Time Stamp
+	XFT_CV = 2   // Compiler Version Number
+	XFT_CD = 128 // Compiler Defined Information
+)
+
+// Storage-mapping class.
+const (
+	XMC_PR     = 0  // Program code
+	XMC_RO     = 1  // Read-only constant
+	XMC_DB     = 2  // Debug dictionary table
+	XMC_TC     = 3  // TOC entry
+	XMC_UA     = 4  // Unclassified
+	XMC_RW     = 5  // Read/Write data
+	XMC_GL     = 6  // Global linkage
+	XMC_XO     = 7  // Extended operation
+	XMC_SV     = 8  // 32-bit supervisor call descriptor
+	XMC_BS     = 9  // BSS class
+	XMC_DS     = 10 // Function descriptor
+	XMC_UC     = 11 // Unnamed FORTRAN common
+	XMC_TC0    = 15 // TOC anchor
+	XMC_TD     = 16 // Scalar data entry in the TOC
+	XMC_SV64   = 17 // 64-bit supervisor call descriptor
+	XMC_SV3264 = 18 // Supervisor call descriptor for both 32-bit and 64-bit
+	XMC_TL     = 20 // Read/Write thread-local data
+	XMC_UL     = 21 // Read/Write thread-local data (.tbss)
+	XMC_TE     = 22 // TOC entry
+)
+
+// Loader Header.
+type LoaderHeader32 struct {
+	Lversion int32  // Loader section version number
+	Lnsyms   int32  // Number of symbol table entries
+	Lnreloc  int32  // Number of relocation table entries
+	Listlen  uint32 // Length of import file ID string table
+	Lnimpid  int32  // Number of import file IDs
+	Limpoff  uint32 // Offset to start of import file IDs
+	Lstlen   uint32 // Length of string table
+	Lstoff   uint32 // Offset to start of string table
+}
+
+type LoaderHeader64 struct {
+	Lversion int32  // Loader section version number
+	Lnsyms   int32  // Number of symbol table entries
+	Lnreloc  int32  // Number of relocation table entries
+	Listlen  uint32 // Length of import file ID string table
+	Lnimpid  int32  // Number of import file IDs
+	Lstlen   uint32 // Length of string table
+	Limpoff  uint64 // Offset to start of import file IDs
+	Lstoff   uint64 // Offset to start of string table
+	Lsymoff  uint64 // Offset to start of symbol table
+	Lrldoff  uint64 // Offset to start of relocation entries
+}
+
+const (
+	LDHDRSZ_32 = 32
+	LDHDRSZ_64 = 56
+)
+
+// Loader Symbol.
+type LoaderSymbol32 struct {
+	Lname   [8]byte // Symbol name or byte offset into string table
+	Lvalue  uint32  // Address field
+	Lscnum  int16   // Section number containing symbol
+	Lsmtype int8    // Symbol type, export, import flags
+	Lsmclas int8    // Symbol storage class
+	Lifile  int32   // Import file ID; ordinal of import file IDs
+	Lparm   uint32  // Parameter type-check field
+}
+
+type LoaderSymbol64 struct {
+	Lvalue  uint64 // Address field
+	Loffset uint32 // Byte offset into string table of symbol name
+	Lscnum  int16  // Section number containing symbol
+	Lsmtype int8   // Symbol type, export, import flags
+	Lsmclas int8   // Symbol storage class
+	Lifile  int32  // Import file ID; ordinal of import file IDs
+	Lparm   uint32 // Parameter type-check field
+}
+
+type Reloc32 struct {
+	Rvaddr  uint32 // (virtual) address of reference
+	Rsymndx uint32 // Index into symbol table
+	Rsize   uint8  // Sign and reloc bit len
+	Rtype   uint8  // Toc relocation type
+}
+
+type Reloc64 struct {
+	Rvaddr  uint64 // (virtual) address of reference
+	Rsymndx uint32 // Index into symbol table
+	Rsize   uint8  // Sign and reloc bit len
+	Rtype   uint8  // Toc relocation type
+}
+
+const (
+	R_POS = 0x00 // A(sym) Positive Relocation
+	R_NEG = 0x01 // -A(sym) Negative Relocation
+	R_REL = 0x02 // A(sym-*) Relative to self
+	R_TOC = 0x03 // A(sym-TOC) Relative to TOC
+	R_TRL = 0x12 // A(sym-TOC) TOC Relative indirect load.
+
+	R_TRLA = 0x13 // A(sym-TOC) TOC Rel load address. modifiable inst
+	R_GL   = 0x05 // A(external TOC of sym) Global Linkage
+	R_TCL  = 0x06 // A(local TOC of sym) Local object TOC address
+	R_RL   = 0x0C // A(sym) Pos indirect load. modifiable instruction
+	R_RLA  = 0x0D // A(sym) Pos Load Address. modifiable instruction
+	R_REF  = 0x0F // AL0(sym) Non relocating ref. No garbage collect
+	R_BA   = 0x08 // A(sym) Branch absolute. Cannot modify instruction
+	R_RBA  = 0x18 // A(sym) Branch absolute. modifiable instruction
+	R_BR   = 0x0A // A(sym-*) Branch rel to self. non modifiable
+	R_RBR  = 0x1A // A(sym-*) Branch rel to self. modifiable instr
+
+	R_TLS    = 0x20 // General-dynamic reference to TLS symbol
+	R_TLS_IE = 0x21 // Initial-exec reference to TLS symbol
+	R_TLS_LD = 0x22 // Local-dynamic reference to TLS symbol
+	R_TLS_LE = 0x23 // Local-exec reference to TLS symbol
+	R_TLSM   = 0x24 // Module reference to TLS symbol
+	R_TLSML  = 0x25 // Module reference to local (own) module
+
+	R_TOCU = 0x30 // Relative to TOC - high order bits
+	R_TOCL = 0x31 // Relative to TOC - low order bits
+)

From ff99a61e5e892dedb88f9f80bce9cc102d2f50b2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= 
Date: Mon, 1 Oct 2018 09:50:36 +0200
Subject: [PATCH 189/240] runtime: port assembly files for aix/ppc64

This commit adds the change on asm_ppc64.s and tls_ppc64.s files for AIX
operating system.

R2 does not need to be set for aix/ppc64 since it should remain valid
througout Go execution, except after a call to a C function.
Moreover, g must always be saved on the tls as syscalls are made with
C functions.

Some modifications on asm_ppc64.s are due to AIX stack layout.

It also removes a useless part in asmcgocall which was done twice.

Change-Id: Ie037ab73da00562bb978f2d0f17fcdabd4a40aa2
Reviewed-on: https://go-review.googlesource.com/c/138735
Run-TryBot: Tobias Klauser 
TryBot-Result: Gobot Gobot 
Reviewed-by: Carlos Eduardo Seo 
Reviewed-by: Ian Lance Taylor 
---
 src/runtime/asm_ppc64x.s | 52 ++++++++++++++++++++++++++++++++++------
 src/runtime/tls_ppc64x.s |  2 ++
 2 files changed, 47 insertions(+), 7 deletions(-)

diff --git a/src/runtime/asm_ppc64x.s b/src/runtime/asm_ppc64x.s
index b180cb06ab..e77c717935 100644
--- a/src/runtime/asm_ppc64x.s
+++ b/src/runtime/asm_ppc64x.s
@@ -140,7 +140,9 @@ TEXT runtime·gogo(SB), NOSPLIT, $16-8
 	MOVD	0(g), R4
 	MOVD	gobuf_sp(R5), R1
 	MOVD	gobuf_lr(R5), R31
+#ifndef GOOS_aix
 	MOVD	24(R1), R2	// restore R2
+#endif
 	MOVD	R31, LR
 	MOVD	gobuf_ret(R5), R3
 	MOVD	gobuf_ctxt(R5), R11
@@ -257,7 +259,9 @@ switch:
 	MOVD	g_m(g), R3
 	MOVD	m_curg(R3), g
 	MOVD	(g_sched+gobuf_sp)(g), R3
+#ifndef GOOS_aix
 	MOVD	24(R3), R2
+#endif
 	// switch back to g
 	MOVD	g_m(g), R3
 	MOVD	m_curg(R3), g
@@ -274,7 +278,9 @@ noswitch:
 	MOVD	0(R11), R12	// code pointer
 	MOVD	R12, CTR
 	BL	(CTR)
+#ifndef GOOS_aix
 	MOVD	24(R1), R2
+#endif
 	RET
 
 /*
@@ -422,11 +428,20 @@ tail: \
 callfn: \
 	/* call function */			\
 	MOVD	f+8(FP), R11;			\
+#ifdef GOOS_aix				\
+	/* AIX won't trigger a SIGSEGV if R11 = nil */	\
+	/* So it manually triggers it */	\
+	CMP	R0, R11				\
+	BNE	2(PC)				\
+	MOVD	R0, 0(R0)			\
+#endif						\
 	MOVD	(R11), R12;			\
 	MOVD	R12, CTR;			\
 	PCDATA  $PCDATA_StackMapIndex, $0;	\
 	BL	(CTR);				\
+#ifndef GOOS_aix				\
 	MOVD	24(R1), R2;			\
+#endif						\
 	/* copy return values back */		\
 	MOVD	argtype+0(FP), R7;		\
 	MOVD	arg+16(FP), R3;			\
@@ -504,12 +519,22 @@ again:
 // the BL deferreturn and jmpdefer rewinds to that.
 TEXT runtime·jmpdefer(SB), NOSPLIT|NOFRAME, $0-16
 	MOVD	0(R1), R31
+#ifdef GOOS_aix
+	MOVD	16(R31), R31	// caller LR is on the previous stack frame on AIX
+#endif
 	SUB     $8, R31
 	MOVD	R31, LR
 
 	MOVD	fv+0(FP), R11
 	MOVD	argp+8(FP), R1
 	SUB	$FIXED_FRAME, R1
+#ifdef GOOS_aix
+	// AIX won't trigger a SIGSEGV if R11 = nil
+	// So it manually triggers it
+	CMP	R0, R11
+	BNE	2(PC)
+	MOVD	R0, 0(R0)
+#endif
 	MOVD	0(R11), R12
 	MOVD	R12, CTR
 	BR	(CTR)
@@ -542,8 +567,13 @@ TEXT ·asmcgocall(SB),NOSPLIT,$0-20
 	// Figure out if we need to switch to m->g0 stack.
 	// We get called to create new OS threads too, and those
 	// come in on the m->g0 stack already.
-	MOVD	g_m(g), R6
-	MOVD	m_g0(R6), R6
+	// Moreover, if it's called inside the signal handler, it must not switch
+	// to g0 as it can be in use by another syscall.
+	MOVD	g_m(g), R8
+	MOVD	m_gsignal(R8), R6
+	CMP	R6, g
+	BEQ	g0
+	MOVD	m_g0(R8), R6
 	CMP	R6, g
 	BEQ	g0
 	BL	gosave<>(SB)
@@ -555,13 +585,22 @@ TEXT ·asmcgocall(SB),NOSPLIT,$0-20
 g0:
 	// Save room for two of our pointers, plus 32 bytes of callee
 	// save area that lives on the caller stack.
+#ifdef GOOS_aix
+	// Create a fake LR to improve backtrace.
+	MOVD	$runtime·asmcgocall(SB), R6
+	MOVD	R6, 16(R1)
+#endif
 	SUB	$48, R1
 	RLDCR	$0, R1, $~15, R1	// 16-byte alignment for gcc ABI
 	MOVD	R5, 40(R1)	// save old g on stack
 	MOVD	(g_stack+stack_hi)(R5), R5
 	SUB	R7, R5
 	MOVD	R5, 32(R1)	// save depth in old g stack (can't just save SP, as stack might be copied during a callback)
+#ifdef GOOS_aix
+	MOVD	R7, 0(R1)	// Save frame pointer to allow manual backtrace with gdb
+#else
 	MOVD	R0, 0(R1)	// clear back chain pointer (TODO can we give it real back trace information?)
+#endif
 	// This is a "global call", so put the global entry point in r12
 	MOVD	R3, R12
 	MOVD	R12, CTR
@@ -574,15 +613,14 @@ g0:
 	// Restore g, stack pointer, toc pointer.
 	// R3 is errno, so don't touch it
 	MOVD	40(R1), g
-	MOVD    (g_stack+stack_hi)(g), R5
-	MOVD    32(R1), R6
-	SUB     R6, R5
-	MOVD    24(R5), R2
-	BL	runtime·save_g(SB)
 	MOVD	(g_stack+stack_hi)(g), R5
 	MOVD	32(R1), R6
 	SUB	R6, R5
+#ifndef GOOS_aix
+	MOVD	24(R5), R2
+#endif
 	MOVD	R5, R1
+	BL	runtime·save_g(SB)
 
 	MOVW	R3, ret+16(FP)
 	RET
diff --git a/src/runtime/tls_ppc64x.s b/src/runtime/tls_ppc64x.s
index ed94989b69..82714853ee 100644
--- a/src/runtime/tls_ppc64x.s
+++ b/src/runtime/tls_ppc64x.s
@@ -23,9 +23,11 @@
 //
 // NOTE: setg_gcc<> assume this clobbers only R31.
 TEXT runtime·save_g(SB),NOSPLIT|NOFRAME,$0-0
+#ifndef GOOS_aix
 	MOVB	runtime·iscgo(SB), R31
 	CMP	R31, $0
 	BEQ	nocgo
+#endif
 	MOVD	runtime·tls_g(SB), R31
 	MOVD	g, 0(R13)(R31*1)
 

From 34585ba51e365e5041f5ee0264e0b46b0ccc95db Mon Sep 17 00:00:00 2001
From: Robert Griesemer 
Date: Thu, 18 Oct 2018 17:39:35 -0700
Subject: [PATCH 190/240] go/types: fix unsymmetric test when typechecking
 comparisons

The existing code assumed that comparability and orderedness
was implied for the 2nd operand if the 1st operand satisfied
these predicates.

Fixes #28164.

Change-Id: I61d4e5eedb3297731a20a14acb3645d11b36fcc5
Reviewed-on: https://go-review.googlesource.com/c/143277
Run-TryBot: Robert Griesemer 
TryBot-Result: Gobot Gobot 
Reviewed-by: Matthew Dempsky 
---
 src/go/types/expr.go            |  4 ++--
 src/go/types/testdata/expr2.src | 13 +++++++++++++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/go/types/expr.go b/src/go/types/expr.go
index 87769d1db0..35e9b36f31 100644
--- a/src/go/types/expr.go
+++ b/src/go/types/expr.go
@@ -590,10 +590,10 @@ func (check *Checker) comparison(x, y *operand, op token.Token) {
 		switch op {
 		case token.EQL, token.NEQ:
 			// spec: "The equality operators == and != apply to operands that are comparable."
-			defined = Comparable(x.typ) || x.isNil() && hasNil(y.typ) || y.isNil() && hasNil(x.typ)
+			defined = Comparable(x.typ) && Comparable(y.typ) || x.isNil() && hasNil(y.typ) || y.isNil() && hasNil(x.typ)
 		case token.LSS, token.LEQ, token.GTR, token.GEQ:
 			// spec: The ordering operators <, <=, >, and >= apply to operands that are ordered."
-			defined = isOrdered(x.typ)
+			defined = isOrdered(x.typ) && isOrdered(y.typ)
 		default:
 			unreachable()
 		}
diff --git a/src/go/types/testdata/expr2.src b/src/go/types/testdata/expr2.src
index 31dc5f021c..0c959e8011 100644
--- a/src/go/types/testdata/expr2.src
+++ b/src/go/types/testdata/expr2.src
@@ -208,6 +208,19 @@ func interfaces() {
 
 	_ = i /* ERROR mismatched types */ == s2
 	_ = i /* ERROR mismatched types */ == &s2
+
+	// issue #28164
+	// testcase from issue
+	_ = interface /* ERROR cannot compare */ {}(nil) == []int(nil)
+
+	// related cases
+	var e interface{}
+	var s []int
+	var x int
+	_ = e /* ERROR cannot compare */ == s
+	_ = s /* ERROR cannot compare */ == e
+	_ = e /* ERROR cannot compare */ < x
+	_ = x /* ERROR cannot compare */ < e
 }
 
 func slices() {

From 41c0b9eb88fa0e161d7564539a8beb3f79247f44 Mon Sep 17 00:00:00 2001
From: Matthew Dempsky 
Date: Thu, 18 Oct 2018 16:39:49 -0700
Subject: [PATCH 191/240] cmd/compile: remove compiling_wrappers

It's no longer needed after removing safemode.

Change-Id: I7581d77a86342e3b6d7c632839f5eb7a5c20902e
Reviewed-on: https://go-review.googlesource.com/c/143397
Run-TryBot: Matthew Dempsky 
TryBot-Result: Gobot Gobot 
Reviewed-by: Brad Fitzpatrick 
---
 src/cmd/compile/internal/gc/go.go      | 2 --
 src/cmd/compile/internal/gc/reflect.go | 4 ----
 2 files changed, 6 deletions(-)

diff --git a/src/cmd/compile/internal/gc/go.go b/src/cmd/compile/internal/gc/go.go
index ae1c257e0e..cfd695097f 100644
--- a/src/cmd/compile/internal/gc/go.go
+++ b/src/cmd/compile/internal/gc/go.go
@@ -208,8 +208,6 @@ var compiling_runtime bool
 // Compiling the standard library
 var compiling_std bool
 
-var compiling_wrappers bool
-
 var use_writebarrier bool
 
 var pure_go bool
diff --git a/src/cmd/compile/internal/gc/reflect.go b/src/cmd/compile/internal/gc/reflect.go
index 2dd81e30f5..4298805903 100644
--- a/src/cmd/compile/internal/gc/reflect.go
+++ b/src/cmd/compile/internal/gc/reflect.go
@@ -406,18 +406,14 @@ func methods(t *types.Type) []*Sig {
 		if !sig.isym.Siggen() {
 			sig.isym.SetSiggen(true)
 			if !types.Identical(this, it) {
-				compiling_wrappers = true
 				genwrapper(it, f, sig.isym)
-				compiling_wrappers = false
 			}
 		}
 
 		if !sig.tsym.Siggen() {
 			sig.tsym.SetSiggen(true)
 			if !types.Identical(this, t) {
-				compiling_wrappers = true
 				genwrapper(t, f, sig.tsym)
-				compiling_wrappers = false
 			}
 		}
 	}

From 0287d8ed1b12229f2ab493602ffa497caabf747c Mon Sep 17 00:00:00 2001
From: Robert Griesemer 
Date: Thu, 18 Oct 2018 21:21:46 -0700
Subject: [PATCH 192/240] go/types: collect type info for type ...T in variadic
 functions

Because the code type-checks T rather than ...T (and then corrects
the type to []T "manually"), it didn't automatically record the
type for the ast.Expr corresponding to ...T. Do it manually.

Fixes #28277.

Change-Id: I3d9aae310c90b01f52d189e70c48dd9007f72207
Reviewed-on: https://go-review.googlesource.com/c/143317
Reviewed-by: Alan Donovan 
---
 src/go/types/api_test.go | 12 ++++++++++++
 src/go/types/typexpr.go  |  5 ++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/go/types/api_test.go b/src/go/types/api_test.go
index c34ecbf9d1..85de9f6079 100644
--- a/src/go/types/api_test.go
+++ b/src/go/types/api_test.go
@@ -257,6 +257,16 @@ func TestTypesInfo(t *testing.T) {
 			`(string, bool)`,
 		},
 
+		// issue 28277
+		{`package issue28277_a; func f(...int)`,
+			`...int`,
+			`[]int`,
+		},
+		{`package issue28277_b; func f(a, b, c ...[]struct{})`,
+			`...[]struct{}`,
+			`[][]struct{}`,
+		},
+
 		// tests for broken code that doesn't parse or type-check
 		{`package x0; func _() { var x struct {f string}; x.f := 0 }`, `x.f`, `string`},
 		{`package x1; func _() { var z string; type x struct {f string}; y := &x{q: z}}`, `z`, `string`},
@@ -389,6 +399,8 @@ func TestPredicatesInfo(t *testing.T) {
 		{`package t0; type _ int`, `int`, `type`},
 		{`package t1; type _ []int`, `[]int`, `type`},
 		{`package t2; type _ func()`, `func()`, `type`},
+		{`package t3; type _ func(int)`, `int`, `type`},
+		{`package t3; type _ func(...int)`, `...int`, `type`},
 
 		// built-ins
 		{`package b0; var _ = len("")`, `len`, `builtin`},
diff --git a/src/go/types/typexpr.go b/src/go/types/typexpr.go
index e6d61b7ec7..8512ca1b80 100644
--- a/src/go/types/typexpr.go
+++ b/src/go/types/typexpr.go
@@ -451,9 +451,12 @@ func (check *Checker) collectParams(scope *Scope, list *ast.FieldList, variadicO
 	}
 
 	// For a variadic function, change the last parameter's type from T to []T.
-	if variadic && len(params) > 0 {
+	// Since we type-checked T rather than ...T, we also need to retro-actively
+	// record the type for ...T.
+	if variadic {
 		last := params[len(params)-1]
 		last.typ = &Slice{elem: last.typ}
+		check.recordTypeAndValue(list.List[len(list.List)-1].Type, typexpr, last.typ, nil)
 	}
 
 	return

From f5636523998594af75ec87d3c2a2070dc1cb65f4 Mon Sep 17 00:00:00 2001
From: Robert Griesemer 
Date: Thu, 18 Oct 2018 15:19:15 -0700
Subject: [PATCH 193/240] go/types: accept recv base type that is alias to a
 pointer type

Per the spec clarification https://golang.org/cl/142757 (issue #27995).

Fixes #28251.
Updates #27995.

Change-Id: Idc142829955f9306a8698c5ed1c24baa8ee2b109
Reviewed-on: https://go-review.googlesource.com/c/143179
Reviewed-by: Alan Donovan 
---
 src/go/types/check_test.go           |  1 +
 src/go/types/resolver.go             | 73 ++++++++++++++++------------
 src/go/types/testdata/issue28251.src | 65 +++++++++++++++++++++++++
 3 files changed, 107 insertions(+), 32 deletions(-)
 create mode 100644 src/go/types/testdata/issue28251.src

diff --git a/src/go/types/check_test.go b/src/go/types/check_test.go
index e8ba1a037c..45e1fcb605 100644
--- a/src/go/types/check_test.go
+++ b/src/go/types/check_test.go
@@ -94,6 +94,7 @@ var tests = [][]string{
 	{"testdata/issue26390.src"},                              // stand-alone test to ensure case is triggered
 	{"testdata/issue23203a.src"},
 	{"testdata/issue23203b.src"},
+	{"testdata/issue28251.src"},
 }
 
 var fset = token.NewFileSet()
diff --git a/src/go/types/resolver.go b/src/go/types/resolver.go
index c2726f4dd2..f6c3b601b2 100644
--- a/src/go/types/resolver.go
+++ b/src/go/types/resolver.go
@@ -460,65 +460,74 @@ func (check *Checker) collectObjects() {
 	for _, f := range methods {
 		fdecl := check.objMap[f].fdecl
 		if list := fdecl.Recv.List; len(list) > 0 {
-			// f is a method
-			// receiver may be of the form T or *T, possibly with parentheses
-			typ := unparen(list[0].Type)
-			if ptr, _ := typ.(*ast.StarExpr); ptr != nil {
-				typ = unparen(ptr.X)
-				// TODO(gri): This may not be sufficient. See issue #27995.
-				f.hasPtrRecv = true
-			}
-			if base, _ := typ.(*ast.Ident); base != nil {
-				// base is a potential base type name; determine
-				// "underlying" defined type and associate f with it
-				if tname := check.resolveBaseTypeName(base); tname != nil {
-					check.methods[tname] = append(check.methods[tname], f)
-				}
+			// f is a method.
+			// Determine the receiver base type and associate f with it.
+			ptr, base := check.resolveBaseTypeName(list[0].Type)
+			if base != nil {
+				f.hasPtrRecv = ptr
+				check.methods[base] = append(check.methods[base], f)
 			}
 		}
 	}
 }
 
-// resolveBaseTypeName returns the non-alias receiver base type name,
-// explicitly declared in the package scope, for the given receiver
-// type name; or nil.
-func (check *Checker) resolveBaseTypeName(name *ast.Ident) *TypeName {
+// resolveBaseTypeName returns the non-alias base type name for typ, and whether
+// there was a pointer indirection to get to it. The base type name must be declared
+// in package scope, and there can be at most one pointer indirection. If no such type
+// name exists, the returned base is nil.
+func (check *Checker) resolveBaseTypeName(typ ast.Expr) (ptr bool, base *TypeName) {
+	// Algorithm: Starting from a type expression, which may be a name,
+	// we follow that type through alias declarations until we reach a
+	// non-alias type name. If we encounter anything but pointer types or
+	// parentheses we're done. If we encounter more than one pointer type
+	// we're done.
 	var path []*TypeName
 	for {
+		typ = unparen(typ)
+
+		// check if we have a pointer type
+		if pexpr, _ := typ.(*ast.StarExpr); pexpr != nil {
+			// if we've already seen a pointer, we're done
+			if ptr {
+				return false, nil
+			}
+			ptr = true
+			typ = unparen(pexpr.X) // continue with pointer base type
+		}
+
+		// typ must be the name
+		name, _ := typ.(*ast.Ident)
+		if name == nil {
+			return false, nil
+		}
+
 		// name must denote an object found in the current package scope
 		// (note that dot-imported objects are not in the package scope!)
 		obj := check.pkg.scope.Lookup(name.Name)
 		if obj == nil {
-			return nil
+			return false, nil
 		}
+
 		// the object must be a type name...
 		tname, _ := obj.(*TypeName)
 		if tname == nil {
-			return nil
+			return false, nil
 		}
 
 		// ... which we have not seen before
 		if check.cycle(tname, path, false) {
-			return nil
+			return false, nil
 		}
 
 		// we're done if tdecl defined tname as a new type
 		// (rather than an alias)
 		tdecl := check.objMap[tname] // must exist for objects in package scope
 		if !tdecl.alias {
-			return tname
+			return ptr, tname
 		}
 
-		// Otherwise, if tdecl defined an alias for a (possibly parenthesized)
-		// type which is not an (unqualified) named type, we're done because
-		// receiver base types must be named types declared in this package.
-		typ := unparen(tdecl.typ) // a type may be parenthesized
-		name, _ = typ.(*ast.Ident)
-		if name == nil {
-			return nil
-		}
-
-		// continue resolving name
+		// otherwise, continue resolving
+		typ = tdecl.typ
 		path = append(path, tname)
 	}
 }
diff --git a/src/go/types/testdata/issue28251.src b/src/go/types/testdata/issue28251.src
new file mode 100644
index 0000000000..a456f5c27e
--- /dev/null
+++ b/src/go/types/testdata/issue28251.src
@@ -0,0 +1,65 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This file contains test cases for various forms of
+// method receiver declarations, per the spec clarification
+// https://golang.org/cl/142757.
+
+package issue28251
+
+// test case from issue28251
+type T struct{}
+
+type T0 = *T
+
+func (T0) m() {}
+
+func _() { (&T{}).m() }
+
+// various alternative forms
+type (
+        T1 = (((T)))
+)
+
+func ((*(T1))) m1() {}
+func _() { (T{}).m2() }
+func _() { (&T{}).m2() }
+
+type (
+        T2 = (((T3)))
+        T3 = T
+)
+
+func (T2) m2() {}
+func _() { (T{}).m2() }
+func _() { (&T{}).m2() }
+
+type (
+        T4 = ((*(T5)))
+        T5 = T
+)
+
+func (T4) m4() {}
+func _() { (T{}).m4 /* ERROR m4 is not in method set of T */ () }
+func _() { (&T{}).m4() }
+
+type (
+        T6 = (((T7)))
+        T7 = (*(T8))
+        T8 = T
+)
+
+func (T6) m6() {}
+func _() { (T{}).m6 /* ERROR m6 is not in method set of T */ () }
+func _() { (&T{}).m6() }
+
+type (
+        T9 = *T10
+        T10 = *T11
+        T11 = T
+)
+
+func (T9 /* ERROR invalid receiver \*\*T */ ) m9() {}
+func _() { (T{}).m9 /* ERROR has no field or method m9 */ () }
+func _() { (&T{}).m9 /* ERROR has no field or method m9 */ () }

From 6c631ae227cb6f15d5b0b8cc39c1715b8f4e9187 Mon Sep 17 00:00:00 2001
From: Denys Smirnov 
Date: Fri, 19 Oct 2018 19:04:29 +0000
Subject: [PATCH 194/240] cmd/compile: in wasm, allocate approximately right
 number of locals for functions

Currently, WASM binary writer requests 16 int registers (locals) and
16 float registers for every function regardless of how many locals the
function uses.

This change counts the number of used registers and requests a number
of locals matching the highest register index. The change has no effect
on performance and neglectable binary size improvement, but it makes
WASM code more readable and easy to analyze.

Change-Id: Ic1079623c0d632b215c68482db909fa440892700
GitHub-Last-Rev: 184634fa918aff74e280904dc2efafcc80735a8b
GitHub-Pull-Request: golang/go#28116
Reviewed-on: https://go-review.googlesource.com/c/140999
Reviewed-by: Richard Musiol 
Run-TryBot: Richard Musiol 
TryBot-Result: Gobot Gobot 
---
 src/cmd/internal/obj/wasm/wasmobj.go | 73 ++++++++++++++++++++++++----
 1 file changed, 63 insertions(+), 10 deletions(-)

diff --git a/src/cmd/internal/obj/wasm/wasmobj.go b/src/cmd/internal/obj/wasm/wasmobj.go
index 8498b40724..b1eae2882b 100644
--- a/src/cmd/internal/obj/wasm/wasmobj.go
+++ b/src/cmd/internal/obj/wasm/wasmobj.go
@@ -705,11 +705,42 @@ func regAddr(reg int16) obj.Addr {
 	return obj.Addr{Type: obj.TYPE_REG, Reg: reg}
 }
 
+// countRegisters returns the number of integer and float registers used by s.
+// It does so by looking for the maximum I* and R* registers.
+func countRegisters(s *obj.LSym) (numI, numF int16) {
+	for p := s.Func.Text; p != nil; p = p.Link {
+		var reg int16
+		switch p.As {
+		case AGet:
+			reg = p.From.Reg
+		case ASet:
+			reg = p.To.Reg
+		case ATee:
+			reg = p.To.Reg
+		default:
+			continue
+		}
+		if reg >= REG_R0 && reg <= REG_R15 {
+			if n := reg - REG_R0 + 1; numI < n {
+				numI = n
+			}
+		} else if reg >= REG_F0 && reg <= REG_F15 {
+			if n := reg - REG_F0 + 1; numF < n {
+				numF = n
+			}
+		}
+	}
+	return
+}
+
 func assemble(ctxt *obj.Link, s *obj.LSym, newprog obj.ProgAlloc) {
 	w := new(bytes.Buffer)
 
+	numI, numF := countRegisters(s)
+
 	// Function starts with declaration of locals: numbers and types.
 	switch s.Name {
+	// memchr and memcmp don't use the normal Go calling convention and need i32 variables.
 	case "memchr":
 		writeUleb128(w, 1) // number of sets of locals
 		writeUleb128(w, 3) // number of locals
@@ -719,11 +750,23 @@ func assemble(ctxt *obj.Link, s *obj.LSym, newprog obj.ProgAlloc) {
 		writeUleb128(w, 2) // number of locals
 		w.WriteByte(0x7F)  // i32
 	default:
-		writeUleb128(w, 2)  // number of sets of locals
-		writeUleb128(w, 16) // number of locals
-		w.WriteByte(0x7E)   // i64
-		writeUleb128(w, 16) // number of locals
-		w.WriteByte(0x7C)   // f64
+		numTypes := 0
+		if numI > 0 {
+			numTypes++
+		}
+		if numF > 0 {
+			numTypes++
+		}
+
+		writeUleb128(w, uint64(numTypes))
+		if numI > 0 {
+			writeUleb128(w, uint64(numI)) // number of locals
+			w.WriteByte(0x7E)             // i64
+		}
+		if numF > 0 {
+			writeUleb128(w, uint64(numF)) // number of locals
+			w.WriteByte(0x7C)             // f64
+		}
 	}
 
 	for p := s.Func.Text; p != nil; p = p.Link {
@@ -737,9 +780,12 @@ func assemble(ctxt *obj.Link, s *obj.LSym, newprog obj.ProgAlloc) {
 			case reg >= REG_PC_F && reg <= REG_RUN:
 				w.WriteByte(0x23) // get_global
 				writeUleb128(w, uint64(reg-REG_PC_F))
-			case reg >= REG_R0 && reg <= REG_F15:
-				w.WriteByte(0x20) // get_local
+			case reg >= REG_R0 && reg <= REG_R15:
+				w.WriteByte(0x20) // get_local (i64)
 				writeUleb128(w, uint64(reg-REG_R0))
+			case reg >= REG_F0 && reg <= REG_F15:
+				w.WriteByte(0x20) // get_local (f64)
+				writeUleb128(w, uint64(numI+(reg-REG_F0)))
 			default:
 				panic("bad Get: invalid register")
 			}
@@ -761,7 +807,11 @@ func assemble(ctxt *obj.Link, s *obj.LSym, newprog obj.ProgAlloc) {
 				} else {
 					w.WriteByte(0x21) // set_local
 				}
-				writeUleb128(w, uint64(reg-REG_R0))
+				if reg <= REG_R15 {
+					writeUleb128(w, uint64(reg-REG_R0))
+				} else {
+					writeUleb128(w, uint64(numI+(reg-REG_F0)))
+				}
 			default:
 				panic("bad Set: invalid register")
 			}
@@ -773,9 +823,12 @@ func assemble(ctxt *obj.Link, s *obj.LSym, newprog obj.ProgAlloc) {
 			}
 			reg := p.To.Reg
 			switch {
-			case reg >= REG_R0 && reg <= REG_F15:
-				w.WriteByte(0x22) // tee_local
+			case reg >= REG_R0 && reg <= REG_R15:
+				w.WriteByte(0x22) // tee_local (i64)
 				writeUleb128(w, uint64(reg-REG_R0))
+			case reg >= REG_F0 && reg <= REG_F15:
+				w.WriteByte(0x22) // tee_local (f64)
+				writeUleb128(w, uint64(numI+(reg-REG_F0)))
 			default:
 				panic("bad Tee: invalid register")
 			}

From 2578ac54eb417488c70324e7f3fc25565ec3f03d Mon Sep 17 00:00:00 2001
From: Josh Bleecher Snyder 
Date: Sun, 6 May 2018 12:58:53 -0700
Subject: [PATCH 195/240] cmd/compile: move argument stack construction to SSA
 generation
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The goal of this change is to move work from walk to SSA,
and simplify things along the way.

This is hard to accomplish cleanly with small incremental changes,
so this large commit message aims to provide a roadmap to the diff.

High level description:

Prior to this change, walk was responsible for constructing (most of) the stack for function calls.
ascompatte gathered variadic arguments into a slice.
It also rewrote n.List from a list of arguments to a list of assignments to stack slots.
ascompatte was called multiple times to handle the receiver in a method call.
reorder1 then introduced temporaries into n.List as needed to avoid smashing the stack.
adjustargs then made extra stack space for go/defer args as needed.

Node to SSA construction evaluated all the statements in n.List,
and issued the function call, assuming that the stack was correctly constructed.
Intrinsic calls had to dig around inside n.List to extract the arguments,
since intrinsics don't use the stack to make function calls.

This change moves stack construction to the SSA construction phase.
ascompatte, now called walkParams, does all the work that ascompatte and reorder1 did.
It handles variadic arguments, inserts the method receiver if needed, and allocates temporaries.
It does not, however, make any assignments to stack slots.
Instead, it moves the function arguments to n.Rlist, leaving assignments to temporaries in n.List.
(It would be better to use Ninit instead of List; future work.)
During SSA construction, after doing all the temporary assignments in n.List,
the function arguments are assigned to stack slots by
constructing the appropriate SSA Value, using (*state).storeArg.
SSA construction also now handles adjustments for go/defer args.
This change also simplifies intrinsic calls, since we no longer need to undo walk's work.

Along the way, we simplify nodarg by pushing the fp==1 case to its callers, where it fits nicely.

Generated code differences:

There were a few optimizations applied along the way, the old way.
f(g()) was rewritten to do a block copy of function results to function arguments.
And reorder1 avoided introducing the final "save the stack" temporary in n.List.

The f(g()) block copy optimization never actually triggered; the order pass rewrote away g(), so that has been removed.

SSA optimizations mostly obviated the need for reorder1's optimization of avoiding the final temporary.
The exception was when the temporary's type was not SSA-able;
in that case, we got a Move into an autotmp and then an immediate Move onto the stack,
with the autotmp never read or used again.
This change introduces a new rewrite rule to detect such pointless double Moves
and collapse them into a single Move.
This is actually more powerful than the original optimization,
since the original optimization relied on the imprecise Node.HasCall calculation.

The other significant difference in the generated code is that the stack is now constructed
completely in SP-offset order. Prior to this change, the stack was constructed somewhat
haphazardly: first the final argument that Node.HasCall deemed to require a temporary,
then other arguments, then the method receiver, then the defer/go args.
SP-offset is probably a good default order. See future work.

There are a few minor object file size changes as a result of this change.
I investigated some regressions in early versions of this change.

One regression (in archive/tar) was the addition of a single CMPQ instruction,
which would be eliminated were this TODO from flagalloc to be done:
	// TODO: Remove original instructions if they are never used.

One regression (in text/template) was an ADDQconstmodify that is now
a regular MOVQLoad+ADDQconst+MOVQStore, due to an unlucky change
in the order in which arguments are written. The argument change
order can also now be luckier, so this appears to be a wash.

All in all, though there will be minor winners and losers,
this change appears to be performance neutral.

Future work:

Move loading the result of function calls to SSA construction; eliminate OINDREGSP.

Consider pushing stack construction deeper into SSA world, perhaps in an arch-specific pass.
Among other benefits, this would make it easier to transition to a new calling convention.
This would require rethinking the handling of stack conflicts and is non-trivial.

Figure out some clean way to indicate that stack construction Stores/Moves
do not alias each other, so that subsequent passes may do things like
CSE+tighten shared stack setup, do DSE using non-first Stores, etc.
This would allow us to eliminate the minor text/template regression.

Possibly make assignments to stack slots not treated as statements by DWARF.

Compiler benchmarks:

name        old time/op       new time/op       delta
Template          182ms ± 2%        179ms ± 2%  -1.69%  (p=0.000 n=47+48)
Unicode          86.3ms ± 5%       85.1ms ± 4%  -1.36%  (p=0.001 n=50+50)
GoTypes           646ms ± 1%        642ms ± 1%  -0.63%  (p=0.000 n=49+48)
Compiler          2.89s ± 1%        2.86s ± 2%  -1.36%  (p=0.000 n=48+50)
SSA               8.47s ± 1%        8.37s ± 2%  -1.22%  (p=0.000 n=47+50)
Flate             122ms ± 2%        121ms ± 2%  -0.66%  (p=0.000 n=47+45)
GoParser          147ms ± 2%        146ms ± 2%  -0.53%  (p=0.006 n=46+49)
Reflect           406ms ± 2%        403ms ± 2%  -0.76%  (p=0.000 n=48+43)
Tar               162ms ± 3%        162ms ± 4%    ~     (p=0.191 n=46+50)
XML               223ms ± 2%        222ms ± 2%  -0.37%  (p=0.031 n=45+49)
[Geo mean]        382ms             378ms       -0.89%

name        old user-time/op  new user-time/op  delta
Template          219ms ± 3%        216ms ± 3%  -1.56%  (p=0.000 n=50+48)
Unicode           109ms ± 6%        109ms ± 5%    ~     (p=0.190 n=50+49)
GoTypes           836ms ± 2%        828ms ± 2%  -0.96%  (p=0.000 n=49+48)
Compiler          3.87s ± 2%        3.80s ± 1%  -1.81%  (p=0.000 n=49+46)
SSA               12.0s ± 1%        11.8s ± 1%  -2.01%  (p=0.000 n=48+50)
Flate             142ms ± 3%        141ms ± 3%  -0.85%  (p=0.003 n=50+48)
GoParser          178ms ± 4%        175ms ± 4%  -1.66%  (p=0.000 n=48+46)
Reflect           520ms ± 2%        512ms ± 2%  -1.44%  (p=0.000 n=45+48)
Tar               200ms ± 3%        198ms ± 4%  -0.61%  (p=0.037 n=47+50)
XML               277ms ± 3%        275ms ± 3%  -0.85%  (p=0.000 n=49+48)
[Geo mean]        482ms             476ms       -1.23%

name        old alloc/op      new alloc/op      delta
Template         36.1MB ± 0%       35.3MB ± 0%  -2.18%  (p=0.008 n=5+5)
Unicode          29.8MB ± 0%       29.3MB ± 0%  -1.58%  (p=0.008 n=5+5)
GoTypes           125MB ± 0%        123MB ± 0%  -2.13%  (p=0.008 n=5+5)
Compiler          531MB ± 0%        513MB ± 0%  -3.40%  (p=0.008 n=5+5)
SSA              2.00GB ± 0%       1.93GB ± 0%  -3.34%  (p=0.008 n=5+5)
Flate            24.5MB ± 0%       24.3MB ± 0%  -1.18%  (p=0.008 n=5+5)
GoParser         29.4MB ± 0%       28.7MB ± 0%  -2.34%  (p=0.008 n=5+5)
Reflect          87.1MB ± 0%       86.0MB ± 0%  -1.33%  (p=0.008 n=5+5)
Tar              35.3MB ± 0%       34.8MB ± 0%  -1.44%  (p=0.008 n=5+5)
XML              47.9MB ± 0%       47.1MB ± 0%  -1.86%  (p=0.008 n=5+5)
[Geo mean]       82.8MB            81.1MB       -2.08%

name        old allocs/op     new allocs/op     delta
Template           352k ± 0%         347k ± 0%  -1.32%  (p=0.008 n=5+5)
Unicode            342k ± 0%         339k ± 0%  -0.66%  (p=0.008 n=5+5)
GoTypes           1.29M ± 0%        1.27M ± 0%  -1.30%  (p=0.008 n=5+5)
Compiler          4.98M ± 0%        4.87M ± 0%  -2.14%  (p=0.008 n=5+5)
SSA               15.7M ± 0%        15.2M ± 0%  -2.86%  (p=0.008 n=5+5)
Flate              233k ± 0%         231k ± 0%  -0.83%  (p=0.008 n=5+5)
GoParser           296k ± 0%         291k ± 0%  -1.54%  (p=0.016 n=5+4)
Reflect           1.05M ± 0%        1.04M ± 0%  -0.65%  (p=0.008 n=5+5)
Tar                343k ± 0%         339k ± 0%  -0.97%  (p=0.008 n=5+5)
XML                432k ± 0%         426k ± 0%  -1.19%  (p=0.008 n=5+5)
[Geo mean]         815k              804k       -1.35%

name        old object-bytes  new object-bytes  delta
Template          505kB ± 0%        505kB ± 0%  -0.01%  (p=0.008 n=5+5)
Unicode           224kB ± 0%        224kB ± 0%    ~     (all equal)
GoTypes          1.82MB ± 0%       1.83MB ± 0%  +0.06%  (p=0.008 n=5+5)
Flate             324kB ± 0%        324kB ± 0%  +0.00%  (p=0.008 n=5+5)
GoParser          402kB ± 0%        402kB ± 0%  +0.04%  (p=0.008 n=5+5)
Reflect          1.39MB ± 0%       1.39MB ± 0%  -0.01%  (p=0.008 n=5+5)
Tar               449kB ± 0%        449kB ± 0%  -0.02%  (p=0.008 n=5+5)
XML               598kB ± 0%        597kB ± 0%  -0.05%  (p=0.008 n=5+5)

Change-Id: Ifc9d5c1bd01f90171414b8fb18ffe2290d271143
Reviewed-on: https://go-review.googlesource.com/c/114797
Run-TryBot: Josh Bleecher Snyder 
TryBot-Result: Gobot Gobot 
Reviewed-by: David Chase 
Reviewed-by: Matthew Dempsky 
---
 src/cmd/compile/internal/gc/ssa.go            | 120 +++---
 src/cmd/compile/internal/gc/syntax.go         |  44 ++-
 src/cmd/compile/internal/gc/walk.go           | 352 +++++-------------
 src/cmd/compile/internal/ssa/config.go        |   1 +
 src/cmd/compile/internal/ssa/export_test.go   |   4 +
 .../compile/internal/ssa/gen/generic.rules    |  14 +
 .../compile/internal/ssa/rewritegeneric.go    |  45 +++
 7 files changed, 236 insertions(+), 344 deletions(-)

diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go
index 3818aaf6b0..cecba59b0a 100644
--- a/src/cmd/compile/internal/gc/ssa.go
+++ b/src/cmd/compile/internal/gc/ssa.go
@@ -3558,59 +3558,34 @@ func (s *state) intrinsicCall(n *Node) *ssa.Value {
 	return v
 }
 
-type callArg struct {
-	offset int64
-	v      *ssa.Value
-}
-type byOffset []callArg
-
-func (x byOffset) Len() int      { return len(x) }
-func (x byOffset) Swap(i, j int) { x[i], x[j] = x[j], x[i] }
-func (x byOffset) Less(i, j int) bool {
-	return x[i].offset < x[j].offset
-}
-
 // intrinsicArgs extracts args from n, evaluates them to SSA values, and returns them.
 func (s *state) intrinsicArgs(n *Node) []*ssa.Value {
-	// This code is complicated because of how walk transforms calls. For a call node,
-	// each entry in n.List is either an assignment to OINDREGSP which actually
-	// stores an arg, or an assignment to a temporary which computes an arg
-	// which is later assigned.
-	// The args can also be out of order.
-	// TODO: when walk goes away someday, this code can go away also.
-	var args []callArg
+	// Construct map of temps; see comments in s.call about the structure of n.
 	temps := map[*Node]*ssa.Value{}
 	for _, a := range n.List.Slice() {
 		if a.Op != OAS {
-			s.Fatalf("non-assignment as a function argument %v", a.Op)
+			s.Fatalf("non-assignment as a temp function argument %v", a.Op)
 		}
 		l, r := a.Left, a.Right
-		switch l.Op {
-		case ONAME:
-			// Evaluate and store to "temporary".
-			// Walk ensures these temporaries are dead outside of n.
-			temps[l] = s.expr(r)
-		case OINDREGSP:
-			// Store a value to an argument slot.
-			var v *ssa.Value
-			if x, ok := temps[r]; ok {
-				// This is a previously computed temporary.
-				v = x
-			} else {
-				// This is an explicit value; evaluate it.
-				v = s.expr(r)
-			}
-			args = append(args, callArg{l.Xoffset, v})
-		default:
-			s.Fatalf("function argument assignment target not allowed: %v", l.Op)
+		if l.Op != ONAME {
+			s.Fatalf("non-ONAME temp function argument %v", a.Op)
 		}
+		// Evaluate and store to "temporary".
+		// Walk ensures these temporaries are dead outside of n.
+		temps[l] = s.expr(r)
 	}
-	sort.Sort(byOffset(args))
-	res := make([]*ssa.Value, len(args))
-	for i, a := range args {
-		res[i] = a.v
+	args := make([]*ssa.Value, n.Rlist.Len())
+	for i, n := range n.Rlist.Slice() {
+		// Store a value to an argument slot.
+		if x, ok := temps[n]; ok {
+			// This is a previously computed temporary.
+			args[i] = x
+			continue
+		}
+		// This is an explicit value; evaluate it.
+		args[i] = s.expr(n)
 	}
-	return res
+	return args
 }
 
 // Calls the function n using the specified call type.
@@ -3651,7 +3626,7 @@ func (s *state) call(n *Node, k callKind) *ssa.Value {
 		n2.Pos = fn.Pos
 		n2.Type = types.Types[TUINT8] // dummy type for a static closure. Could use runtime.funcval if we had it.
 		closure = s.expr(n2)
-		// Note: receiver is already assigned in n.List, so we don't
+		// Note: receiver is already present in n.Rlist, so we don't
 		// want to set it here.
 	case OCALLINTER:
 		if fn.Op != ODOTINTER {
@@ -3672,32 +3647,43 @@ func (s *state) call(n *Node, k callKind) *ssa.Value {
 	dowidth(fn.Type)
 	stksize := fn.Type.ArgWidth() // includes receiver
 
-	// Run all argument assignments. The arg slots have already
-	// been offset by the appropriate amount (+2*widthptr for go/defer,
-	// +widthptr for interface calls).
-	// For OCALLMETH, the receiver is set in these statements.
+	// Run all assignments of temps.
+	// The temps are introduced to avoid overwriting argument
+	// slots when arguments themselves require function calls.
 	s.stmtList(n.List)
 
-	// Set receiver (for interface calls)
-	if rcvr != nil {
-		argStart := Ctxt.FixedFrameSize()
-		if k != callNormal {
-			argStart += int64(2 * Widthptr)
-		}
-		addr := s.constOffPtrSP(s.f.Config.Types.UintptrPtr, argStart)
-		s.store(types.Types[TUINTPTR], addr, rcvr)
-	}
-
-	// Defer/go args
+	// Store arguments to stack, including defer/go arguments and receiver for method calls.
+	// These are written in SP-offset order.
+	argStart := Ctxt.FixedFrameSize()
+	// Defer/go args.
 	if k != callNormal {
 		// Write argsize and closure (args to newproc/deferproc).
-		argStart := Ctxt.FixedFrameSize()
 		argsize := s.constInt32(types.Types[TUINT32], int32(stksize))
 		addr := s.constOffPtrSP(s.f.Config.Types.UInt32Ptr, argStart)
 		s.store(types.Types[TUINT32], addr, argsize)
 		addr = s.constOffPtrSP(s.f.Config.Types.UintptrPtr, argStart+int64(Widthptr))
 		s.store(types.Types[TUINTPTR], addr, closure)
 		stksize += 2 * int64(Widthptr)
+		argStart += 2 * int64(Widthptr)
+	}
+
+	// Set receiver (for interface calls).
+	if rcvr != nil {
+		addr := s.constOffPtrSP(s.f.Config.Types.UintptrPtr, argStart)
+		s.store(types.Types[TUINTPTR], addr, rcvr)
+	}
+
+	// Write args.
+	t := n.Left.Type
+	args := n.Rlist.Slice()
+	if n.Op == OCALLMETH {
+		f := t.Recv()
+		s.storeArg(args[0], f.Type, argStart+f.Offset)
+		args = args[1:]
+	}
+	for i, n := range args {
+		f := t.Params().Field(i)
+		s.storeArg(n, f.Type, argStart+f.Offset)
 	}
 
 	// call target
@@ -4182,6 +4168,20 @@ func (s *state) storeTypePtrs(t *types.Type, left, right *ssa.Value) {
 	}
 }
 
+func (s *state) storeArg(n *Node, t *types.Type, off int64) {
+	pt := types.NewPtr(t)
+	sp := s.constOffPtrSP(pt, off)
+
+	if !canSSAType(t) {
+		a := s.addr(n, false)
+		s.move(t, sp, a)
+		return
+	}
+
+	a := s.expr(n)
+	s.storeType(t, sp, a, 0, false)
+}
+
 // slice computes the slice v[i:j:k] and returns ptr, len, and cap of result.
 // i,j,k may be nil, in which case they are set to their default value.
 // t is a slice, ptr to array, or string type.
diff --git a/src/cmd/compile/internal/gc/syntax.go b/src/cmd/compile/internal/gc/syntax.go
index 3ae3976d96..9ea727fa64 100644
--- a/src/cmd/compile/internal/gc/syntax.go
+++ b/src/cmd/compile/internal/gc/syntax.go
@@ -603,24 +603,32 @@ const (
 	OAS2DOTTYPE      // List = Rlist (x, ok = I.(int))
 	OASOP            // Left Etype= Right (x += y)
 	OCALL            // Left(List) (function call, method call or type conversion)
-	OCALLFUNC        // Left(List) (function call f(args))
-	OCALLMETH        // Left(List) (direct method call x.Method(args))
-	OCALLINTER       // Left(List) (interface method call x.Method(args))
-	OCALLPART        // Left.Right (method expression x.Method, not called)
-	OCAP             // cap(Left)
-	OCLOSE           // close(Left)
-	OCLOSURE         // func Type { Body } (func literal)
-	OCOMPLIT         // Right{List} (composite literal, not yet lowered to specific form)
-	OMAPLIT          // Type{List} (composite literal, Type is map)
-	OSTRUCTLIT       // Type{List} (composite literal, Type is struct)
-	OARRAYLIT        // Type{List} (composite literal, Type is array)
-	OSLICELIT        // Type{List} (composite literal, Type is slice)
-	OPTRLIT          // &Left (left is composite literal)
-	OCONV            // Type(Left) (type conversion)
-	OCONVIFACE       // Type(Left) (type conversion, to interface)
-	OCONVNOP         // Type(Left) (type conversion, no effect)
-	OCOPY            // copy(Left, Right)
-	ODCL             // var Left (declares Left of type Left.Type)
+
+	// OCALLFUNC, OCALLMETH, and OCALLINTER have the same structure.
+	// Prior to walk, they are: Left(List), where List is all regular arguments.
+	// If present, Right is an ODDDARG that holds the
+	// generated slice used in a call to a variadic function.
+	// After walk, List is a series of assignments to temporaries,
+	// and Rlist is an updated set of arguments, including any ODDDARG slice.
+	// TODO(josharian/khr): Use Ninit instead of List for the assignments to temporaries. See CL 114797.
+	OCALLFUNC  // Left(List/Rlist) (function call f(args))
+	OCALLMETH  // Left(List/Rlist) (direct method call x.Method(args))
+	OCALLINTER // Left(List/Rlist) (interface method call x.Method(args))
+	OCALLPART  // Left.Right (method expression x.Method, not called)
+	OCAP       // cap(Left)
+	OCLOSE     // close(Left)
+	OCLOSURE   // func Type { Body } (func literal)
+	OCOMPLIT   // Right{List} (composite literal, not yet lowered to specific form)
+	OMAPLIT    // Type{List} (composite literal, Type is map)
+	OSTRUCTLIT // Type{List} (composite literal, Type is struct)
+	OARRAYLIT  // Type{List} (composite literal, Type is array)
+	OSLICELIT  // Type{List} (composite literal, Type is slice)
+	OPTRLIT    // &Left (left is composite literal)
+	OCONV      // Type(Left) (type conversion)
+	OCONVIFACE // Type(Left) (type conversion, to interface)
+	OCONVNOP   // Type(Left) (type conversion, no effect)
+	OCOPY      // copy(Left, Right)
+	ODCL       // var Left (declares Left of type Left.Type)
 
 	// Used during parsing but don't last.
 	ODCLFUNC  // func f() or func (r) f()
diff --git a/src/cmd/compile/internal/gc/walk.go b/src/cmd/compile/internal/gc/walk.go
index cc4b9ec2d3..41e2ad3589 100644
--- a/src/cmd/compile/internal/gc/walk.go
+++ b/src/cmd/compile/internal/gc/walk.go
@@ -109,32 +109,6 @@ func paramoutheap(fn *Node) bool {
 	return false
 }
 
-// adds "adjust" to all the argument locations for the call n.
-// n must be a defer or go node that has already been walked.
-func adjustargs(n *Node, adjust int) {
-	callfunc := n.Left
-	for _, arg := range callfunc.List.Slice() {
-		if arg.Op != OAS {
-			Fatalf("call arg not assignment")
-		}
-		lhs := arg.Left
-		if lhs.Op == ONAME {
-			// This is a temporary introduced by reorder1.
-			// The real store to the stack appears later in the arg list.
-			continue
-		}
-
-		if lhs.Op != OINDREGSP {
-			Fatalf("call argument store does not use OINDREGSP")
-		}
-
-		// can't really check this in machine-indep code.
-		//if(lhs->val.u.reg != D_SP)
-		//      Fatalf("call arg assign not indreg(SP)")
-		lhs.Xoffset += int64(adjust)
-	}
-}
-
 // The result of walkstmt MUST be assigned back to n, e.g.
 // 	n.Left = walkstmt(n.Left)
 func walkstmt(n *Node) *Node {
@@ -264,9 +238,6 @@ func walkstmt(n *Node) *Node {
 			n.Left = walkexpr(n.Left, &n.Ninit)
 		}
 
-		// make room for size & fn arguments.
-		adjustargs(n, 2*Widthptr)
-
 	case OFOR, OFORUNTIL:
 		if n.Left != nil {
 			walkstmtlist(n.Left.Ninit.Slice())
@@ -334,8 +305,19 @@ func walkstmt(n *Node) *Node {
 		}
 		walkexprlist(n.List.Slice(), &n.Ninit)
 
-		ll := ascompatte(nil, false, Curfn.Type.Results(), n.List.Slice(), 1, &n.Ninit)
-		n.List.Set(ll)
+		// For each return parameter (lhs), assign the corresponding result (rhs).
+		lhs := Curfn.Type.Results()
+		rhs := n.List.Slice()
+		res := make([]*Node, lhs.NumFields())
+		for i, nl := range lhs.FieldSlice() {
+			nname := asNode(nl.Nname)
+			if nname.isParamHeapCopy() {
+				nname = nname.Name.Param.Stackcopy
+			}
+			a := nod(OAS, nname, rhs[i])
+			res[i] = convas(a, &n.Ninit)
+		}
+		n.List.Set(res)
 
 	case ORETJMP:
 		break
@@ -612,19 +594,12 @@ opswitch:
 	case OCLOSUREVAR, OCFUNC:
 		n.SetAddable(true)
 
-	case OCALLINTER:
-		usemethod(n)
-		t := n.Left.Type
-		if n.List.Len() != 0 && n.List.First().Op == OAS {
-			break
+	case OCALLINTER, OCALLFUNC, OCALLMETH:
+		if n.Op == OCALLINTER {
+			usemethod(n)
 		}
-		n.Left = walkexpr(n.Left, init)
-		walkexprlist(n.List.Slice(), init)
-		ll := ascompatte(n, n.Isddd(), t.Params(), n.List.Slice(), 0, init)
-		n.List.Set(reorder1(ll))
 
-	case OCALLFUNC:
-		if n.Left.Op == OCLOSURE {
+		if n.Op == OCALLFUNC && n.Left.Op == OCLOSURE {
 			// Transform direct call of a closure to call of a normal function.
 			// transformclosure already did all preparation work.
 
@@ -645,30 +620,7 @@ opswitch:
 			}
 		}
 
-		t := n.Left.Type
-		if n.List.Len() != 0 && n.List.First().Op == OAS {
-			break
-		}
-
-		n.Left = walkexpr(n.Left, init)
-		walkexprlist(n.List.Slice(), init)
-
-		ll := ascompatte(n, n.Isddd(), t.Params(), n.List.Slice(), 0, init)
-		n.List.Set(reorder1(ll))
-
-	case OCALLMETH:
-		t := n.Left.Type
-		if n.List.Len() != 0 && n.List.First().Op == OAS {
-			break
-		}
-		n.Left = walkexpr(n.Left, init)
-		walkexprlist(n.List.Slice(), init)
-		ll := ascompatte(n, false, t.Recvs(), []*Node{n.Left.Left}, 0, init)
-		lr := ascompatte(n, n.Isddd(), t.Params(), n.List.Slice(), 0, init)
-		ll = append(ll, lr...)
-		n.Left.Left = nil
-		updateHasCall(n.Left)
-		n.List.Set(reorder1(ll))
+		walkCall(n, init)
 
 	case OAS, OASOP:
 		init.AppendNodes(&n.Ninit)
@@ -1714,7 +1666,7 @@ func ascompatet(nl Nodes, nr *types.Type) []*Node {
 			l = tmp
 		}
 
-		a := nod(OAS, l, nodarg(r, 0))
+		a := nod(OAS, l, nodarg(r))
 		a = convas(a, &nn)
 		updateHasCall(a)
 		if a.HasCall() {
@@ -1727,99 +1679,23 @@ func ascompatet(nl Nodes, nr *types.Type) []*Node {
 	return append(nn.Slice(), mm.Slice()...)
 }
 
-// nodarg returns a Node for the function argument denoted by t,
-// which is either the entire function argument or result struct (t is a  struct *types.Type)
-// or a specific argument (t is a *types.Field within a struct *types.Type).
+// nodarg returns a Node for the function argument f.
+// f is a *types.Field within a struct *types.Type.
 //
-// If fp is 0, the node is for use by a caller invoking the given
+// The node is for use by a caller invoking the given
 // function, preparing the arguments before the call
 // or retrieving the results after the call.
 // In this case, the node will correspond to an outgoing argument
 // slot like 8(SP).
-//
-// If fp is 1, the node is for use by the function itself
-// (the callee), to retrieve its arguments or write its results.
-// In this case the node will be an ONAME with an appropriate
-// type and offset.
-func nodarg(t interface{}, fp int) *Node {
-	var n *Node
-
-	switch t := t.(type) {
-	default:
-		Fatalf("bad nodarg %T(%v)", t, t)
-
-	case *types.Type:
-		// Entire argument struct, not just one arg
-		if !t.IsFuncArgStruct() {
-			Fatalf("nodarg: bad type %v", t)
-		}
-
-		// Build fake variable name for whole arg struct.
-		n = newname(lookup(".args"))
-		n.Type = t
-		first := t.Field(0)
-		if first == nil {
-			Fatalf("nodarg: bad struct")
-		}
-		if first.Offset == BADWIDTH {
-			Fatalf("nodarg: offset not computed for %v", t)
-		}
-		n.Xoffset = first.Offset
-
-	case *types.Field:
-		if fp == 1 {
-			// NOTE(rsc): This should be using t.Nname directly,
-			// except in the case where t.Nname.Sym is the blank symbol and
-			// so the assignment would be discarded during code generation.
-			// In that case we need to make a new node, and there is no harm
-			// in optimization passes to doing so. But otherwise we should
-			// definitely be using the actual declaration and not a newly built node.
-			// The extra Fatalf checks here are verifying that this is the case,
-			// without changing the actual logic (at time of writing, it's getting
-			// toward time for the Go 1.7 beta).
-			// At some quieter time (assuming we've never seen these Fatalfs happen)
-			// we could change this code to use "expect" directly.
-			expect := asNode(t.Nname)
-			if expect.isParamHeapCopy() {
-				expect = expect.Name.Param.Stackcopy
-			}
-
-			for _, n := range Curfn.Func.Dcl {
-				if (n.Class() == PPARAM || n.Class() == PPARAMOUT) && !t.Sym.IsBlank() && n.Sym == t.Sym {
-					if n != expect {
-						Fatalf("nodarg: unexpected node: %v (%p %v) vs %v (%p %v)", n, n, n.Op, asNode(t.Nname), asNode(t.Nname), asNode(t.Nname).Op)
-					}
-					return n
-				}
-			}
-
-			if !expect.Sym.IsBlank() {
-				Fatalf("nodarg: did not find node in dcl list: %v", expect)
-			}
-		}
-
-		// Build fake name for individual variable.
-		// This is safe because if there was a real declared name
-		// we'd have used it above.
-		n = newname(lookup("__"))
-		n.Type = t.Type
-		if t.Offset == BADWIDTH {
-			Fatalf("nodarg: offset not computed for %v", t)
-		}
-		n.Xoffset = t.Offset
-		n.Orig = asNode(t.Nname)
-	}
-
-	// Rewrite argument named _ to __,
-	// or else the assignment to _ will be
-	// discarded during code generation.
-	if n.isBlank() {
-		n.Sym = lookup("__")
-	}
-
-	if fp != 0 {
-		Fatalf("bad fp: %v", fp)
+func nodarg(f *types.Field) *Node {
+	// Build fake name for individual variable.
+	n := newname(lookup("__"))
+	n.Type = f.Type
+	if f.Offset == BADWIDTH {
+		Fatalf("nodarg: offset not computed for %v", f)
 	}
+	n.Xoffset = f.Offset
+	n.Orig = asNode(f.Nname)
 
 	// preparing arguments for call
 	n.Op = OINDREGSP
@@ -1856,59 +1732,58 @@ func mkdotargslice(typ *types.Type, args []*Node, init *Nodes, ddd *Node) *Node
 	return n
 }
 
-// check assign expression list to
-// a type list. called in
-//	return expr-list
-//	func(expr-list)
-func ascompatte(call *Node, isddd bool, lhs *types.Type, rhs []*Node, fp int, init *Nodes) []*Node {
-	// f(g()) where g has multiple return values
-	if len(rhs) == 1 && rhs[0].Type.IsFuncArgStruct() {
-		// optimization - can do block copy
-		if eqtypenoname(rhs[0].Type, lhs) {
-			nl := nodarg(lhs, fp)
-			nr := convnop(rhs[0], nl.Type)
-			n := convas(nod(OAS, nl, nr), init)
-			n.SetTypecheck(1)
-			return []*Node{n}
-		}
-
-		// conversions involved.
-		// copy into temporaries.
-		var tmps []*Node
-		for _, nr := range rhs[0].Type.FieldSlice() {
-			tmps = append(tmps, temp(nr.Type))
-		}
-
-		a := nod(OAS2, nil, nil)
-		a.List.Set(tmps)
-		a.Rlist.Set(rhs)
-		a = typecheck(a, Etop)
-		a = walkstmt(a)
-		init.Append(a)
-
-		rhs = tmps
+func walkCall(n *Node, init *Nodes) {
+	if n.Rlist.Len() != 0 {
+		return // already walked
 	}
+	n.Left = walkexpr(n.Left, init)
+	walkexprlist(n.List.Slice(), init)
 
-	// For each parameter (LHS), assign its corresponding argument (RHS).
+	params := n.Left.Type.Params()
+	args := n.List.Slice()
 	// If there's a ... parameter (which is only valid as the final
 	// parameter) and this is not a ... call expression,
 	// then assign the remaining arguments as a slice.
-	var nn []*Node
-	for i, nl := range lhs.FieldSlice() {
-		var nr *Node
-		if nl.Isddd() && !isddd {
-			nr = mkdotargslice(nl.Type, rhs[i:], init, call.Right)
-		} else {
-			nr = rhs[i]
+	if nf := params.NumFields(); nf > 0 {
+		if last := params.Field(nf - 1); last.Isddd() && !n.Isddd() {
+			tail := args[nf-1:]
+			slice := mkdotargslice(last.Type, tail, init, n.Right)
+			// Allow immediate GC.
+			for i := range tail {
+				tail[i] = nil
+			}
+			args = append(args[:nf-1], slice)
 		}
-
-		a := nod(OAS, nodarg(nl, fp), nr)
-		a = convas(a, init)
-		a.SetTypecheck(1)
-		nn = append(nn, a)
 	}
 
-	return nn
+	// If this is a method call, add the receiver at the beginning of the args.
+	if n.Op == OCALLMETH {
+		withRecv := make([]*Node, len(args)+1)
+		withRecv[0] = n.Left.Left
+		n.Left.Left = nil
+		copy(withRecv[1:], args)
+		args = withRecv
+	}
+
+	// For any argument whose evaluation might require a function call,
+	// store that argument into a temporary variable,
+	// to prevent that calls from clobbering arguments already on the stack.
+	// When instrumenting, all arguments might require function calls.
+	var tempAssigns []*Node
+	for i, arg := range args {
+		updateHasCall(arg)
+		if instrumenting || arg.HasCall() {
+			// make assignment of fncall to tempname
+			tmp := temp(arg.Type)
+			a := nod(OAS, tmp, arg)
+			tempAssigns = append(tempAssigns, a)
+			// replace arg with temp
+			args[i] = tmp
+		}
+	}
+
+	n.List.Set(tempAssigns)
+	n.Rlist.Set(args)
 }
 
 // generate code for print
@@ -2111,71 +1986,6 @@ func convas(n *Node, init *Nodes) *Node {
 	return n
 }
 
-// from ascompat[te]
-// evaluating actual function arguments.
-//	f(a,b)
-// if there is exactly one function expr,
-// then it is done first. otherwise must
-// make temp variables
-func reorder1(all []*Node) []*Node {
-	// When instrumenting, force all arguments into temporary
-	// variables to prevent instrumentation calls from clobbering
-	// arguments already on the stack.
-
-	funcCalls := 0
-	if !instrumenting {
-		if len(all) == 1 {
-			return all
-		}
-
-		for _, n := range all {
-			updateHasCall(n)
-			if n.HasCall() {
-				funcCalls++
-			}
-		}
-		if funcCalls == 0 {
-			return all
-		}
-	}
-
-	var g []*Node // fncalls assigned to tempnames
-	var f *Node   // last fncall assigned to stack
-	var r []*Node // non fncalls and tempnames assigned to stack
-	d := 0
-	for _, n := range all {
-		if !instrumenting {
-			if !n.HasCall() {
-				r = append(r, n)
-				continue
-			}
-
-			d++
-			if d == funcCalls {
-				f = n
-				continue
-			}
-		}
-
-		// make assignment of fncall to tempname
-		a := temp(n.Right.Type)
-
-		a = nod(OAS, a, n.Right)
-		g = append(g, a)
-
-		// put normal arg assignment on list
-		// with fncall replaced by tempname
-		n.Right = a.Left
-
-		r = append(r, n)
-	}
-
-	if f != nil {
-		g = append(g, f)
-	}
-	return append(g, r...)
-}
-
 // from ascompat[ee]
 //	a,b = c,d
 // simultaneous assignment. there cannot
@@ -2501,14 +2311,24 @@ func paramstoheap(params *types.Type) []*Node {
 // The generated code is added to Curfn's Enter list.
 func zeroResults() {
 	for _, f := range Curfn.Type.Results().Fields().Slice() {
-		if v := asNode(f.Nname); v != nil && v.Name.Param.Heapaddr != nil {
+		v := asNode(f.Nname)
+		if v != nil && v.Name.Param.Heapaddr != nil {
 			// The local which points to the return value is the
 			// thing that needs zeroing. This is already handled
 			// by a Needzero annotation in plive.go:livenessepilogue.
 			continue
 		}
+		if v.isParamHeapCopy() {
+			// TODO(josharian/khr): Investigate whether we can switch to "continue" here,
+			// and document more in either case.
+			// In the review of CL 114797, Keith wrote (roughly):
+			// I don't think the zeroing below matters.
+			// The stack return value will never be marked as live anywhere in the function.
+			// It is not written to until deferreturn returns.
+			v = v.Name.Param.Stackcopy
+		}
 		// Zero the stack location containing f.
-		Curfn.Func.Enter.Append(nodl(Curfn.Pos, OAS, nodarg(f, 1), nil))
+		Curfn.Func.Enter.Append(nodl(Curfn.Pos, OAS, v, nil))
 	}
 }
 
diff --git a/src/cmd/compile/internal/ssa/config.go b/src/cmd/compile/internal/ssa/config.go
index 40008bcf87..e79629695a 100644
--- a/src/cmd/compile/internal/ssa/config.go
+++ b/src/cmd/compile/internal/ssa/config.go
@@ -178,6 +178,7 @@ type GCNode interface {
 	Typ() *types.Type
 	String() string
 	IsSynthetic() bool
+	IsAutoTmp() bool
 	StorageClass() StorageClass
 }
 
diff --git a/src/cmd/compile/internal/ssa/export_test.go b/src/cmd/compile/internal/ssa/export_test.go
index 9c776d4b16..b76410d597 100644
--- a/src/cmd/compile/internal/ssa/export_test.go
+++ b/src/cmd/compile/internal/ssa/export_test.go
@@ -86,6 +86,10 @@ func (d *DummyAuto) IsSynthetic() bool {
 	return false
 }
 
+func (d *DummyAuto) IsAutoTmp() bool {
+	return true
+}
+
 func (DummyFrontend) StringData(s string) interface{} {
 	return nil
 }
diff --git a/src/cmd/compile/internal/ssa/gen/generic.rules b/src/cmd/compile/internal/ssa/gen/generic.rules
index 8d2691d29c..14a67846dc 100644
--- a/src/cmd/compile/internal/ssa/gen/generic.rules
+++ b/src/cmd/compile/internal/ssa/gen/generic.rules
@@ -1799,3 +1799,17 @@
 					(Zero {t1} [n] dst mem)))))
 
 (StaticCall {sym} x) && needRaceCleanup(sym,v) -> x
+
+// Collapse moving A -> B -> C into just A -> C.
+// Later passes (deadstore, elim unread auto) will remove the A -> B move, if possible.
+// This happens most commonly when B is an autotmp inserted earlier
+// during compilation to ensure correctness.
+(Move {t1} [s1] dst tmp1 midmem:(Move {t2} [s2] tmp2 src _))
+	&& s1 == s2
+	&& t1.(*types.Type).Compare(t2.(*types.Type)) == types.CMPeq
+	&& isSamePtr(tmp1, tmp2)
+	-> (Move {t1} [s1] dst src midmem)
+
+// Elide self-moves. This only happens rarely (e.g test/fixedbugs/bug277.go).
+// However, this rule is needed to prevent the previous rule from looping forever in such cases.
+(Move dst src mem) && isSamePtr(dst, src) -> mem
diff --git a/src/cmd/compile/internal/ssa/rewritegeneric.go b/src/cmd/compile/internal/ssa/rewritegeneric.go
index 26341a9217..f0a1346acf 100644
--- a/src/cmd/compile/internal/ssa/rewritegeneric.go
+++ b/src/cmd/compile/internal/ssa/rewritegeneric.go
@@ -17353,6 +17353,51 @@ func rewriteValuegeneric_OpMove_20(v *Value) bool {
 		v.AddArg(v1)
 		return true
 	}
+	// match: (Move {t1} [s1] dst tmp1 midmem:(Move {t2} [s2] tmp2 src _))
+	// cond: s1 == s2 && t1.(*types.Type).Compare(t2.(*types.Type)) == types.CMPeq && isSamePtr(tmp1, tmp2)
+	// result: (Move {t1} [s1] dst src midmem)
+	for {
+		s1 := v.AuxInt
+		t1 := v.Aux
+		_ = v.Args[2]
+		dst := v.Args[0]
+		tmp1 := v.Args[1]
+		midmem := v.Args[2]
+		if midmem.Op != OpMove {
+			break
+		}
+		s2 := midmem.AuxInt
+		t2 := midmem.Aux
+		_ = midmem.Args[2]
+		tmp2 := midmem.Args[0]
+		src := midmem.Args[1]
+		if !(s1 == s2 && t1.(*types.Type).Compare(t2.(*types.Type)) == types.CMPeq && isSamePtr(tmp1, tmp2)) {
+			break
+		}
+		v.reset(OpMove)
+		v.AuxInt = s1
+		v.Aux = t1
+		v.AddArg(dst)
+		v.AddArg(src)
+		v.AddArg(midmem)
+		return true
+	}
+	// match: (Move dst src mem)
+	// cond: isSamePtr(dst, src)
+	// result: mem
+	for {
+		_ = v.Args[2]
+		dst := v.Args[0]
+		src := v.Args[1]
+		mem := v.Args[2]
+		if !(isSamePtr(dst, src)) {
+			break
+		}
+		v.reset(OpCopy)
+		v.Type = mem.Type
+		v.AddArg(mem)
+		return true
+	}
 	return false
 }
 func rewriteValuegeneric_OpMul16_0(v *Value) bool {

From 2e88689168a57ae550ddae7ad0966fa14c877c5f Mon Sep 17 00:00:00 2001
From: Robert Griesemer 
Date: Fri, 19 Oct 2018 15:11:37 -0700
Subject: [PATCH 196/240] go/types: temporarily disable a verification in
 Stdlib test

Keeps the longtest builder green for now.
Proper fix to come ASAP.

Also, reword an internal comment that could easily be misread.

Updates #28282.

Change-Id: I8f41c9faa5a3eb638e6204bae3ff374ed49e5177
Reviewed-on: https://go-review.googlesource.com/c/143478
Run-TryBot: Robert Griesemer 
Reviewed-by: Matthew Dempsky 
TryBot-Result: Gobot Gobot 
---
 src/go/types/stdlib_test.go | 28 +++++++++++++++++-----------
 src/go/types/typexpr.go     |  2 +-
 2 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/src/go/types/stdlib_test.go b/src/go/types/stdlib_test.go
index 229d203099..6e492b5291 100644
--- a/src/go/types/stdlib_test.go
+++ b/src/go/types/stdlib_test.go
@@ -231,19 +231,25 @@ func typecheck(t *testing.T, path string, filenames []string) {
 
 	// Perform checks of API invariants.
 
-	// All Objects have a package, except predeclared ones.
-	errorError := Universe.Lookup("error").Type().Underlying().(*Interface).ExplicitMethod(0) // (error).Error
-	for id, obj := range info.Uses {
-		predeclared := obj == Universe.Lookup(obj.Name()) || obj == errorError
-		if predeclared == (obj.Pkg() != nil) {
-			posn := fset.Position(id.Pos())
-			if predeclared {
-				t.Errorf("%s: predeclared object with package: %s", posn, obj)
-			} else {
-				t.Errorf("%s: user-defined object without package: %s", posn, obj)
+	// The code below fails at the moment - see issue #28282.
+	// Exit early for now to keep the longtest builder happy.
+	// TODO(gri) fix this ASAP and uncomment the code below.
+
+	/*
+		// All Objects have a package, except predeclared ones.
+		errorError := Universe.Lookup("error").Type().Underlying().(*Interface).ExplicitMethod(0) // (error).Error
+		for id, obj := range info.Uses {
+			predeclared := obj == Universe.Lookup(obj.Name()) || obj == errorError
+			if predeclared == (obj.Pkg() != nil) {
+				posn := fset.Position(id.Pos())
+				if predeclared {
+					t.Errorf("%s: predeclared object with package: %s", posn, obj)
+				} else {
+					t.Errorf("%s: user-defined object without package: %s", posn, obj)
+				}
 			}
 		}
-	}
+	*/
 }
 
 // pkgFilenames returns the list of package filenames for the given directory.
diff --git a/src/go/types/typexpr.go b/src/go/types/typexpr.go
index 8512ca1b80..0a9c0f13e3 100644
--- a/src/go/types/typexpr.go
+++ b/src/go/types/typexpr.go
@@ -541,7 +541,7 @@ func (check *Checker) interfaceType(ityp *Interface, iface *ast.InterfaceType, d
 	}
 	info := check.infoFromTypeLit(check.scope, iface, tname, path)
 	if info == nil || info == &emptyIfaceInfo {
-		// error or empty interface - exit early
+		// we got an error or the empty interface - exit early
 		ityp.allMethods = markComplete
 		return
 	}

From ecccdccf3e235c124a768e5474e07cfb958f8aeb Mon Sep 17 00:00:00 2001
From: Nick Craig-Wood 
Date: Thu, 18 Oct 2018 16:26:56 +0100
Subject: [PATCH 197/240] misc/wasm: fix panic on os.Stdout.Sync() in the
 browser

Before this change running os.Stdout.Sync() in the browser would panic
the application with:

panic: syscall/js: Value.Call: property fsync is not a function, got undefined

Afterwards Sync() becomes a noop for compatibility reasons.

Change-Id: I1fcef694beb35fdee3173f87371e1ff233b15d32
Reviewed-on: https://go-review.googlesource.com/c/143138
Reviewed-by: Richard Musiol 
Run-TryBot: Richard Musiol 
TryBot-Result: Gobot Gobot 
---
 misc/wasm/wasm_exec.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/misc/wasm/wasm_exec.js b/misc/wasm/wasm_exec.js
index bd9754e53a..78eb306253 100644
--- a/misc/wasm/wasm_exec.js
+++ b/misc/wasm/wasm_exec.js
@@ -59,6 +59,9 @@
 				err.code = "ENOSYS";
 				callback(err);
 			},
+			fsync(fd, callback) {
+				callback(null);
+			},
 		};
 	}
 

From 035f9e8102d3b46877b7462fcd365324272d1d0e Mon Sep 17 00:00:00 2001
From: Andrew Bonventre 
Date: Fri, 12 Oct 2018 15:39:30 -0400
Subject: [PATCH 198/240] doc: update docs.html with new tour import path

As of golang.org/cl/141857 the import path has changed from
golang.org/x/tour/gotour to golang.org/x/tour

Change-Id: Ib54ab2e50188ef66c8a5c45136babfa49ad6934a
Reviewed-on: https://go-review.googlesource.com/c/141917
Run-TryBot: Andrew Bonventre 
TryBot-Result: Gobot Gobot 
Reviewed-by: Brad Fitzpatrick 
---
 doc/docs.html | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/docs.html b/doc/docs.html
index 955eb3044e..8f79d3a770 100644
--- a/doc/docs.html
+++ b/doc/docs.html
@@ -50,10 +50,10 @@ learned. You can {{if not $.GoogleCN}}take the tour
 online or{{end}} install it locally with:
 
    
 
    -$ go get golang.org/x/tour/gotour
+$ go get golang.org/x/tour
 
    
 
    
-This will place the gotour binary in your workspace's bin directory.
+This will place the tour binary in your workspace's bin directory.
 
    
 
 
    How to write Go code
    

From f5df0a95751e92efcc5adb301603781035eac5b3 Mon Sep 17 00:00:00 2001
From: Tobias Klauser 
Date: Fri, 19 Oct 2018 18:09:42 +0200
Subject: [PATCH 199/240] cmd/internal/xcoff: don't use io.SeekCurrent for
 go1.4 compatibility

This fixes the build with go1.4 during bootstrap.

Change-Id: I35fa1dc3d877d31d5ffe515f5f19188f4a8b77f4
Reviewed-on: https://go-review.googlesource.com/c/143377
Run-TryBot: Tobias Klauser 
TryBot-Result: Gobot Gobot 
Reviewed-by: Ian Lance Taylor 
---
 src/cmd/internal/xcoff/file.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/cmd/internal/xcoff/file.go b/src/cmd/internal/xcoff/file.go
index 86a85c388c..0923b9fcf3 100644
--- a/src/cmd/internal/xcoff/file.go
+++ b/src/cmd/internal/xcoff/file.go
@@ -355,7 +355,7 @@ func NewFile(r io.ReaderAt) (*File, error) {
 
 		// Read csect auxiliary entry (by convention, it is the last).
 		if !needAuxFcn {
-			if _, err := sr.Seek(int64(numaux-1)*SYMESZ, io.SeekCurrent); err != nil {
+			if _, err := sr.Seek(int64(numaux-1)*SYMESZ, os.SEEK_CUR); err != nil {
 				return nil, err
 			}
 		}
@@ -382,7 +382,7 @@ func NewFile(r io.ReaderAt) (*File, error) {
 		f.Symbols = append(f.Symbols, sym)
 	skip:
 		i += numaux // Skip auxiliary entries
-		if _, err := sr.Seek(int64(numaux)*SYMESZ, io.SeekCurrent); err != nil {
+		if _, err := sr.Seek(int64(numaux)*SYMESZ, os.SEEK_CUR); err != nil {
 			return nil, err
 		}
 	}

From 7c2718b12a33180b3f6099e321c25af35c67f6fd Mon Sep 17 00:00:00 2001
From: Rob Pike 
Date: Mon, 22 Oct 2018 14:04:18 +1100
Subject: [PATCH 200/240] doc: tweak example in Effective Go

A prior attempt at addressing the issue got bogged down in an
endless conversation around the subtleties of Read semantics.
Let's not go there.

Instead, we put the issue to bed, perhaps not in perfect comfort
but well enough, by moving a line of the example so that even
if there is a "benign" error as the issue suggests, the loop
terminates with n and err correctly set.

Fixes #27818

Change-Id: I4a32d56c9e782f17578565d90b22ce531e3d8667
Reviewed-on: https://go-review.googlesource.com/c/143677
Reviewed-by: Ian Lance Taylor 
---
 doc/effective_go.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/effective_go.html b/doc/effective_go.html
index 89c1d08782..38d09f4c73 100644
--- a/doc/effective_go.html
+++ b/doc/effective_go.html
@@ -1402,11 +1402,11 @@ the moment, the following snippet would also read the first 32 bytes of the buff
     var err error
     for i := 0; i < 32; i++ {
         nbytes, e := f.Read(buf[i:i+1])  // Read one byte.
+        n += nbytes
         if nbytes == 0 || e != nil {
             err = e
             break
         }
-        n += nbytes
     }

    From 3bf9b77c0c8f123728fcfc802599232e9bd95476 Mon Sep 17 00:00:00 2001 From: Rob Pike Date: Mon, 22 Oct 2018 14:17:06 +1100 Subject: [PATCH 201/240] encoding/gob: increase "tooBig" from 1GB to 8GB on 64-bit machines A little shift magic makes it easy to adjust the maximum buffer size on machines with larger integers. Fixes #27635 Change-Id: I1f26b07a363fbb9730df2377052475fa88bbb781 Reviewed-on: https://go-review.googlesource.com/c/143678 Run-TryBot: Rob Pike TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/encoding/gob/decoder.go | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/src/encoding/gob/decoder.go b/src/encoding/gob/decoder.go index 5ef0388862..f4f740ef42 100644 --- a/src/encoding/gob/decoder.go +++ b/src/encoding/gob/decoder.go @@ -12,10 +12,10 @@ import ( "sync" ) -// tooBig provides a sanity check for sizes; used in several places. -// Upper limit of 1GB, allowing room to grow a little without overflow. -// TODO: make this adjustable? -const tooBig = 1 << 30 +// tooBig provides a sanity check for sizes; used in several places. Upper limit +// of is 1GB on 32-bit systems, 8GB on 64-bit, allowing room to grow a little +// without overflow. +const tooBig = (1 << 30) << (^uint(0) >> 62) // A Decoder manages the receipt of type and data information read from the // remote side of a connection. From 1e8ecefcd50fe9e9ae86f7c3a7a4f918c5e8e0c4 Mon Sep 17 00:00:00 2001 From: Carlos Eduardo Seo Date: Mon, 15 Oct 2018 22:29:05 -0300 Subject: [PATCH 202/240] cmd/compile: intrinsify math/big.mulWW on ppc64x MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This change implements mulWW as an intrinsic for ppc64x. Performance numbers below: name old time/op new time/op delta QuoRem 4.54µs ±45% 3.22µs ± 0% -29.22% (p=0.029 n=4+4) ModSqrt225_Tonelli 765µs ± 3% 757µs ± 0% -1.02% (p=0.029 n=4+4) ModSqrt225_3Mod4 231µs ± 0% 231µs ± 0% -0.10% (p=0.029 n=4+4) ModSqrt231_Tonelli 789µs ± 0% 788µs ± 0% -0.14% (p=0.029 n=4+4) ModSqrt231_5Mod8 267µs ± 0% 267µs ± 0% -0.13% (p=0.029 n=4+4) Sqrt 49.5µs ±17% 45.3µs ± 0% -8.48% (p=0.029 n=4+4) IntSqr/1 32.2ns ±22% 24.2ns ± 0% -24.79% (p=0.029 n=4+4) IntSqr/2 60.6ns ± 0% 60.9ns ± 0% +0.50% (p=0.029 n=4+4) IntSqr/3 82.8ns ± 0% 83.3ns ± 0% +0.51% (p=0.029 n=4+4) IntSqr/5 122ns ± 0% 121ns ± 0% -1.22% (p=0.029 n=4+4) IntSqr/8 227ns ± 0% 226ns ± 0% -0.44% (p=0.029 n=4+4) IntSqr/10 300ns ± 0% 298ns ± 0% -0.67% (p=0.029 n=4+4) IntSqr/20 1.02µs ± 0% 0.89µs ± 0% -13.08% (p=0.029 n=4+4) IntSqr/30 1.73µs ± 0% 1.51µs ± 0% -12.73% (p=0.029 n=4+4) IntSqr/50 3.69µs ± 1% 3.29µs ± 0% -10.70% (p=0.029 n=4+4) IntSqr/80 7.64µs ± 0% 7.04µs ± 0% -7.91% (p=0.029 n=4+4) IntSqr/100 11.1µs ± 0% 10.3µs ± 0% -7.04% (p=0.029 n=4+4) IntSqr/200 37.9µs ± 0% 36.4µs ± 0% -4.13% (p=0.029 n=4+4) IntSqr/300 69.4µs ± 0% 66.0µs ± 0% -4.94% (p=0.029 n=4+4) IntSqr/500 174µs ± 0% 168µs ± 0% -3.10% (p=0.029 n=4+4) IntSqr/800 347µs ± 0% 333µs ± 0% -4.06% (p=0.029 n=4+4) IntSqr/1000 524µs ± 0% 507µs ± 0% -3.21% (p=0.029 n=4+4) Change-Id: If067452f5b6579ad3a2e9daa76a7ffe6fceae1bb Reviewed-on: https://go-review.googlesource.com/c/143217 Run-TryBot: Giovanni Bajo TryBot-Result: Gobot Gobot Reviewed-by: Giovanni Bajo --- src/cmd/compile/internal/gc/ssa.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go index cecba59b0a..2ce59097af 100644 --- a/src/cmd/compile/internal/gc/ssa.go +++ b/src/cmd/compile/internal/gc/ssa.go @@ -3499,7 +3499,7 @@ func init() { func(s *state, n *Node, args []*ssa.Value) *ssa.Value { return s.newValue2(ssa.OpMul64uhilo, types.NewTuple(types.Types[TUINT64], types.Types[TUINT64]), args[0], args[1]) }, - sys.ArchAMD64, sys.ArchARM64) + sys.ArchAMD64, sys.ArchARM64, sys.ArchPPC64LE, sys.ArchPPC64) add("math/big", "divWW", func(s *state, n *Node, args []*ssa.Value) *ssa.Value { return s.newValue3(ssa.OpDiv128u, types.NewTuple(types.Types[TUINT64], types.Types[TUINT64]), args[0], args[1], args[2]) From 86ce1cb060446bcee2454080c7f55e754dbf7f82 Mon Sep 17 00:00:00 2001 From: fanzha02 Date: Fri, 22 Jun 2018 12:08:47 +0000 Subject: [PATCH 203/240] cmd/internal/obj/arm64: reclassify 32-bit/64-bit constants MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Current assembler saves constants in Offset which type is int64, causing 32-bit constants have a incorrect class. This CL reclassifies constants when opcodes are 32-bit variant, like MOVW, ANDW and ADDW, etc. Besides, this CL encodes some constants of ADDCON class as MOVs instructions. This CL changes the assembler behavior as follows. 1. go assembler ADDW $MOVCON, Rn, Rd previous version: MOVD $MOVCON, Rtmp; ADDW Rtmp, Rn, Rd current version: MOVW $MOVCON, Rtmp; ADDW Rtmp, Rn, Rd 2. go assembly MOVW $0xaaaaffff, R1 previous version: treats $0xaaaaffff as VCON, encodes it as MOVW 0x994, R1 (loads it from pool). current version: treats $0xaaaaffff as MOVCON, and encodes it into MOVW instructions. 3. go assembly MOVD $0x210000, R1 previous version: treats $0x210000 as ADDCON, loads it from pool current version: treats $0x210000 as MOVCON, and encodes it into MOVD instructions. Add the test cases. 1. Binary size before/after. binary size change pkg/linux_arm64 -1.534KB pkg/tool/linux_arm64 -0.718KB go -0.32KB gofmt no change 2. go1 benchmark result. name old time/op new time/op delta BinaryTree17-8 6.26s ± 1% 6.28s ± 1% ~ (p=0.105 n=10+10) Fannkuch11-8 5.40s ± 0% 5.39s ± 0% -0.29% (p=0.028 n=9+10) FmtFprintfEmpty-8 94.5ns ± 0% 95.0ns ± 0% +0.51% (p=0.000 n=10+9) FmtFprintfString-8 163ns ± 1% 159ns ± 1% -2.06% (p=0.000 n=10+9) FmtFprintfInt-8 200ns ± 1% 196ns ± 1% -1.99% (p=0.000 n=9+10) FmtFprintfIntInt-8 292ns ± 3% 284ns ± 1% -2.87% (p=0.001 n=10+9) FmtFprintfPrefixedInt-8 422ns ± 1% 420ns ± 1% -0.59% (p=0.015 n=10+10) FmtFprintfFloat-8 458ns ± 0% 463ns ± 1% +1.19% (p=0.000 n=9+10) FmtManyArgs-8 1.37µs ± 1% 1.35µs ± 1% -1.85% (p=0.000 n=10+10) GobDecode-8 15.5ms ± 1% 15.3ms ± 1% -1.82% (p=0.000 n=10+10) GobEncode-8 11.7ms ± 5% 11.7ms ± 2% ~ (p=0.549 n=10+9) Gzip-8 622ms ± 0% 624ms ± 0% +0.23% (p=0.000 n=10+9) Gunzip-8 73.6ms ± 0% 73.8ms ± 1% ~ (p=0.077 n=9+9) HTTPClientServer-8 115µs ± 1% 115µs ± 1% ~ (p=0.796 n=10+10) JSONEncode-8 31.1ms ± 2% 28.7ms ± 1% -7.98% (p=0.000 n=10+9) JSONDecode-8 145ms ± 0% 145ms ± 1% ~ (p=0.447 n=9+10) Mandelbrot200-8 9.67ms ± 0% 9.60ms ± 0% -0.76% (p=0.000 n=9+9) GoParse-8 7.56ms ± 1% 7.58ms ± 0% +0.21% (p=0.035 n=10+9) RegexpMatchEasy0_32-8 208ns ±10% 222ns ± 0% ~ (p=0.531 n=10+6) RegexpMatchEasy0_1K-8 699ns ± 4% 694ns ± 4% ~ (p=0.868 n=10+10) RegexpMatchEasy1_32-8 186ns ± 8% 190ns ±12% ~ (p=0.955 n=10+10) RegexpMatchEasy1_1K-8 1.13µs ± 1% 1.05µs ± 2% -6.64% (p=0.000 n=10+10) RegexpMatchMedium_32-8 316ns ± 7% 288ns ± 1% -8.68% (p=0.000 n=10+7) RegexpMatchMedium_1K-8 90.2µs ± 0% 85.5µs ± 2% -5.19% (p=0.000 n=10+10) RegexpMatchHard_32-8 5.53µs ± 0% 3.90µs ± 0% -29.52% (p=0.000 n=10+10) RegexpMatchHard_1K-8 119µs ± 0% 124µs ± 0% +4.29% (p=0.000 n=9+10) Revcomp-8 1.07s ± 0% 1.07s ± 0% ~ (p=0.094 n=9+9) Template-8 162ms ± 1% 160ms ± 2% ~ (p=0.089 n=10+10) TimeParse-8 756ns ± 2% 763ns ± 1% ~ (p=0.158 n=10+10) TimeFormat-8 758ns ± 1% 746ns ± 1% -1.52% (p=0.000 n=10+10) name old speed new speed delta GobDecode-8 49.4MB/s ± 1% 50.3MB/s ± 1% +1.84% (p=0.000 n=10+10) GobEncode-8 65.6MB/s ± 5% 65.4MB/s ± 2% ~ (p=0.549 n=10+9) Gzip-8 31.2MB/s ± 0% 31.1MB/s ± 0% -0.24% (p=0.000 n=9+9) Gunzip-8 264MB/s ± 0% 263MB/s ± 1% ~ (p=0.073 n=9+9) JSONEncode-8 62.3MB/s ± 2% 67.7MB/s ± 1% +8.67% (p=0.000 n=10+9) JSONDecode-8 13.4MB/s ± 0% 13.4MB/s ± 1% ~ (p=0.508 n=9+10) GoParse-8 7.66MB/s ± 1% 7.64MB/s ± 0% -0.23% (p=0.049 n=10+9) RegexpMatchEasy0_32-8 154MB/s ± 9% 143MB/s ± 3% ~ (p=0.303 n=10+7) RegexpMatchEasy0_1K-8 1.46GB/s ± 4% 1.47GB/s ± 4% ~ (p=0.912 n=10+10) RegexpMatchEasy1_32-8 172MB/s ± 9% 170MB/s ±12% ~ (p=0.971 n=10+10) RegexpMatchEasy1_1K-8 908MB/s ± 1% 972MB/s ± 2% +7.12% (p=0.000 n=10+10) RegexpMatchMedium_32-8 3.17MB/s ± 7% 3.46MB/s ± 1% +9.14% (p=0.000 n=10+7) RegexpMatchMedium_1K-8 11.3MB/s ± 0% 12.0MB/s ± 2% +5.51% (p=0.000 n=10+10) RegexpMatchHard_32-8 5.78MB/s ± 0% 8.21MB/s ± 0% +41.93% (p=0.000 n=9+10) RegexpMatchHard_1K-8 8.62MB/s ± 0% 8.27MB/s ± 0% -4.11% (p=0.000 n=9+10) Revcomp-8 237MB/s ± 0% 237MB/s ± 0% ~ (p=0.081 n=9+9) Template-8 12.0MB/s ± 1% 12.1MB/s ± 2% ~ (p=0.072 n=10+10) Change-Id: I080801f520366b42d5f9699954bd33106976a81b Reviewed-on: https://go-review.googlesource.com/c/120661 Run-TryBot: Ben Shi TryBot-Result: Gobot Gobot Reviewed-by: Cherry Zhang --- src/cmd/asm/internal/asm/testdata/arm64.s | 30 +++- src/cmd/internal/obj/arm64/a.out.go | 1 + src/cmd/internal/obj/arm64/anames7.go | 1 + src/cmd/internal/obj/arm64/asm7.go | 171 ++++++++++++++++++---- 4 files changed, 170 insertions(+), 33 deletions(-) diff --git a/src/cmd/asm/internal/asm/testdata/arm64.s b/src/cmd/asm/internal/asm/testdata/arm64.s index 079c620f9b..12c7adbd04 100644 --- a/src/cmd/asm/internal/asm/testdata/arm64.s +++ b/src/cmd/asm/internal/asm/testdata/arm64.s @@ -191,6 +191,11 @@ TEXT foo(SB), DUPOK|NOSPLIT, $-8 FMOVD F4, (R2)(R6) // FMOVD F4, (R2)(R6*1) // 446826fc FMOVD F4, (R2)(R6<<3) // 447826fc + CMPW $40960, R0 // 1f284071 + CMPW $27745, R2 // 3b8c8d525f001b6b + CMNW $0x3fffffc0, R2 // CMNW $1073741760, R2 // fb5f1a325f001b2b + CMPW $0xffff0, R1 // CMPW $1048560, R1 // fb3f1c323f001b6b + ADD $0x3fffffffc000, R5 // ADD $70368744161280, R5 // fb7f72b2a5001b8b // LTYPE1 imsr ',' spreg ',' // { // outcode($1, &$2, $4, &nullgen); @@ -226,6 +231,16 @@ TEXT foo(SB), DUPOK|NOSPLIT, $-8 ANDS $0x22220000, R3, R4 // ANDS $572653568, R3, R4 // 5b44a4d264001bea BICS $0x22220000, R3, R4 // BICS $572653568, R3, R4 // 5b44a4d264003bea + EOR $0xe03fffffffffffff, R20, R22 // EOR $-2287828610704211969, R20, R22 // 96e243d2 + TSTW $0x600000006, R1 // TSTW $25769803782, R1 // 3f041f72 + ANDS $0xffff, R2 // ANDS $65535, R2 // 423c40f2 + AND $0x7fffffff, R3 // AND $2147483647, R3 // 63784092 + ANDS $0x0ffffffff80000000, R2 // ANDS $-2147483648, R2 // 428061f2 + AND $0xfffff, R2 // AND $1048575, R2 // 424c4092 + ANDW $0xf00fffff, R1 // ANDW $4027580415, R1 // 215c0412 + ANDSW $0xff00ffff, R1 // ANDSW $4278255615, R1 // 215c0872 + TSTW $0xff00ff, R1 // TSTW $16711935, R1 // 3f9c0072 + AND $8, R0, RSP // 1f007d92 ORR $8, R0, RSP // 1f007db2 EOR $8, R0, RSP // 1f007dd2 @@ -233,6 +248,19 @@ TEXT foo(SB), DUPOK|NOSPLIT, $-8 ORN $8, R0, RSP // 1ff87cb2 EON $8, R0, RSP // 1ff87cd2 + MOVD $0x3fffffffc000, R0 // MOVD $70368744161280, R0 // e07f72b2 + MOVW $0xaaaa0000, R1 // MOVW $2863267840, R1 // 4155b552 + MOVW $0xaaaaffff, R1 // MOVW $2863333375, R1 // a1aaaa12 + MOVW $0xaaaa, R1 // MOVW $43690, R1 // 41559552 + MOVW $0xffffaaaa, R1 // MOVW $4294945450, R1 // a1aa8a12 + MOVW $0xffff0000, R1 // MOVW $4294901760, R1 // e1ffbf52 + MOVD $0xffff00000000000, R1 // MOVD $1152903912420802560, R1 // e13f54b2 + MOVD $0x11110000, R1 // MOVD $286326784, R1 // 2122a2d2 + MOVD $0, R1 // 010080d2 + MOVD $-1, R1 // 01008092 + MOVD $0x210000, R0 // MOVD $2162688, R0 // 2004a0d2 + MOVD $0xffffffffffffaaaa, R1 // MOVD $-21846, R1 // a1aa8a92 + // // CLS // @@ -428,7 +456,7 @@ TEXT foo(SB), DUPOK|NOSPLIT, $-8 CMP R22.SXTX, RSP // ffe336eb CMP $0x22220000, RSP // CMP $572653568, RSP // 5b44a4d2ff633beb - CMPW $0x22220000, RSP // CMPW $572653568, RSP // 5b44a4d2ff633b6b + CMPW $0x22220000, RSP // CMPW $572653568, RSP // 5b44a452ff633b6b // TST TST $15, R2 // 5f0c40f2 diff --git a/src/cmd/internal/obj/arm64/a.out.go b/src/cmd/internal/obj/arm64/a.out.go index 37df688b21..c4c75e41d4 100644 --- a/src/cmd/internal/obj/arm64/a.out.go +++ b/src/cmd/internal/obj/arm64/a.out.go @@ -407,6 +407,7 @@ const ( C_ABCON0 // could be C_ADDCON0 or C_BITCON C_ADDCON0 // 12-bit unsigned, unshifted C_ABCON // could be C_ADDCON or C_BITCON + C_AMCON // could be C_ADDCON or C_MOVCON C_ADDCON // 12-bit unsigned, shifted left by 0 or 12 C_MBCON // could be C_MOVCON or C_BITCON C_MOVCON // generated by a 16-bit constant, optionally inverted and/or shifted by multiple of 16 diff --git a/src/cmd/internal/obj/arm64/anames7.go b/src/cmd/internal/obj/arm64/anames7.go index a768f2cbef..f8fdc68c1e 100644 --- a/src/cmd/internal/obj/arm64/anames7.go +++ b/src/cmd/internal/obj/arm64/anames7.go @@ -23,6 +23,7 @@ var cnames7 = []string{ "ABCON0", "ADDCON0", "ABCON", + "AMCON", "ADDCON", "MBCON", "MOVCON", diff --git a/src/cmd/internal/obj/arm64/asm7.go b/src/cmd/internal/obj/arm64/asm7.go index 3056455f31..6a6e81807a 100644 --- a/src/cmd/internal/obj/arm64/asm7.go +++ b/src/cmd/internal/obj/arm64/asm7.go @@ -164,6 +164,10 @@ func OPBIT(x uint32) uint32 { return 1<<30 | 0<<29 | 0xD6<<21 | 0<<16 | x<<10 } +func MOVCONST(d int64, s int, rt int) uint32 { + return uint32(((d>>uint(s*16))&0xFFFF)<<5) | uint32(s)&3<<21 | uint32(rt&31) +} + const ( LFROM = 1 << 0 LTO = 1 << 1 @@ -272,12 +276,10 @@ var optab = []Optab{ /* MOVs that become MOVK/MOVN/MOVZ/ADD/SUB/OR */ {AMOVW, C_MOVCON, C_NONE, C_NONE, C_REG, 32, 4, 0, 0, 0}, {AMOVD, C_MOVCON, C_NONE, C_NONE, C_REG, 32, 4, 0, 0, 0}, - - // TODO: these don't work properly. - // { AMOVW, C_ADDCON, C_NONE, C_REG, 2, 4, 0 , 0}, - // { AMOVD, C_ADDCON, C_NONE, C_REG, 2, 4, 0 , 0}, {AMOVW, C_BITCON, C_NONE, C_NONE, C_REG, 32, 4, 0, 0, 0}, {AMOVD, C_BITCON, C_NONE, C_NONE, C_REG, 32, 4, 0, 0, 0}, + {AMOVW, C_LCON, C_NONE, C_NONE, C_REG, 12, 4, 0, LFROM, 0}, + {AMOVD, C_VCON, C_NONE, C_NONE, C_REG, 12, 4, 0, LFROM, 0}, {AMOVK, C_VCON, C_NONE, C_NONE, C_REG, 33, 4, 0, 0, 0}, {AMOVD, C_AACON, C_NONE, C_NONE, C_REG, 4, 4, REGFROM, 0, 0}, @@ -318,9 +320,7 @@ var optab = []Optab{ {AWORD, C_NONE, C_NONE, C_NONE, C_LCON, 14, 4, 0, 0, 0}, {AWORD, C_NONE, C_NONE, C_NONE, C_LEXT, 14, 4, 0, 0, 0}, {AWORD, C_NONE, C_NONE, C_NONE, C_ADDR, 14, 4, 0, 0, 0}, - {AMOVW, C_VCON, C_NONE, C_NONE, C_REG, 12, 4, 0, LFROM, 0}, {AMOVW, C_VCONADDR, C_NONE, C_NONE, C_REG, 68, 8, 0, 0, 0}, - {AMOVD, C_VCON, C_NONE, C_NONE, C_REG, 12, 4, 0, LFROM, 0}, {AMOVD, C_VCONADDR, C_NONE, C_NONE, C_REG, 68, 8, 0, 0, 0}, {AMOVB, C_REG, C_NONE, C_NONE, C_ADDR, 64, 12, 0, 0, 0}, {AMOVBU, C_REG, C_NONE, C_NONE, C_ADDR, 64, 12, 0, 0, 0}, @@ -1105,6 +1105,23 @@ func isSTXPop(op obj.As) bool { return false } +func isANDWop(op obj.As) bool { + switch op { + case AANDW, AORRW, AEORW, AANDSW, ATSTW, + ABICW, AEONW, AORNW, ABICSW: + return true + } + return false +} + +func isADDWop(op obj.As) bool { + switch op { + case AADDW, AADDSW, ASUBW, ASUBSW, ACMNW, ACMPW: + return true + } + return false +} + func isRegShiftOrExt(a *obj.Addr) bool { return (a.Index-obj.RBaseARM64)®_EXT != 0 || (a.Index-obj.RBaseARM64)®_LSL != 0 } @@ -1411,6 +1428,52 @@ func rclass(r int16) int { return C_GOK } +// con32class reclassifies the constant of 32-bit instruction. Becuase the constant type is 32-bit, +// but saved in Offset which type is int64, con32class treats it as uint32 type and reclassifies it. +func (c *ctxt7) con32class(a *obj.Addr) int { + v := uint32(a.Offset) + if v == 0 { + return C_ZCON + } + if isaddcon(int64(v)) { + if v <= 0xFFF { + if isbitcon(uint64(v)) { + return C_ABCON0 + } + return C_ADDCON0 + } + if isbitcon(uint64(v)) { + return C_ABCON + } + return C_ADDCON + } + + t := movcon(int64(v)) + if t >= 0 { + if isbitcon(uint64(v)) { + return C_MBCON + } + return C_MOVCON + } + + t = movcon(int64(^v)) + if t >= 0 { + if isbitcon(uint64(v)) { + return C_MBCON + } + return C_MOVCON + } + + if isbitcon(uint64(v)) { + return C_BITCON + } + + if 0 <= v && v <= 0xffffff { + return C_ADDCON2 + } + return C_LCON +} + func (c *ctxt7) aclass(a *obj.Addr) int { switch a.Type { case obj.TYPE_NONE: @@ -1517,6 +1580,12 @@ func (c *ctxt7) aclass(a *obj.Addr) int { if isbitcon(uint64(v)) { return C_ABCON } + if movcon(v) >= 0 { + return C_AMCON + } + if movcon(^v) >= 0 { + return C_AMCON + } return C_ADDCON } @@ -1609,6 +1678,34 @@ func (c *ctxt7) oplook(p *obj.Prog) *Optab { } a1 = a0 + 1 p.From.Class = int8(a1) + // more specific classification of 32-bit integers + if p.From.Type == obj.TYPE_CONST && p.From.Name == obj.NAME_NONE { + if p.As == AMOVW || isADDWop(p.As) { + ra0 := c.con32class(&p.From) + // do not break C_ADDCON2 when S bit is set + if (p.As == AADDSW || p.As == ASUBSW) && ra0 == C_ADDCON2 { + ra0 = C_LCON + } + a1 = ra0 + 1 + p.From.Class = int8(a1) + } + if isANDWop(p.As) { + switch p.As { + case AANDW, AORRW, AEORW, AANDSW, ATSTW: + // For 32-bit logical instruction with constant, + // rewrite the high 32-bit to be a copy of the low + // 32-bit, so that the BITCON test can be shared + // for both 32-bit and 64-bit. + if a0 == C_BITCON { + break + } + fallthrough + default: + a1 = c.con32class(&p.From) + 1 + p.From.Class = int8(a1) + } + } + } } a1-- @@ -1679,7 +1776,7 @@ func cmp(a int, b int) bool { } case C_ADDCON: - if b == C_ZCON || b == C_ABCON0 || b == C_ADDCON0 || b == C_ABCON { + if b == C_ZCON || b == C_ABCON0 || b == C_ADDCON0 || b == C_ABCON || b == C_AMCON { return true } @@ -1689,7 +1786,7 @@ func cmp(a int, b int) bool { } case C_MOVCON: - if b == C_MBCON || b == C_ZCON || b == C_ADDCON0 { + if b == C_MBCON || b == C_ZCON || b == C_ADDCON0 || b == C_AMCON { return true } @@ -1699,7 +1796,7 @@ func cmp(a int, b int) bool { } case C_LCON: - if b == C_ZCON || b == C_BITCON || b == C_ADDCON || b == C_ADDCON0 || b == C_ABCON || b == C_ABCON0 || b == C_MBCON || b == C_MOVCON || b == C_ADDCON2 { + if b == C_ZCON || b == C_BITCON || b == C_ADDCON || b == C_ADDCON0 || b == C_ABCON || b == C_ABCON0 || b == C_MBCON || b == C_MOVCON || b == C_ADDCON2 || b == C_AMCON { return true } @@ -3501,8 +3598,8 @@ func (c *ctxt7) asmout(p *obj.Prog, o *Optab, out []uint32) { if r == 0 { r = rt } - o1 = c.oaddi(p, int32(op), int32(c.regoff(&p.From)) & 0x000fff, r, rt) - o2 = c.oaddi(p, int32(op), int32(c.regoff(&p.From)) & 0xfff000, rt, rt) + o1 = c.oaddi(p, int32(op), int32(c.regoff(&p.From))&0x000fff, r, rt) + o2 = c.oaddi(p, int32(op), int32(c.regoff(&p.From))&0xfff000, rt, rt) case 50: /* sys/sysl */ o1 = c.opirr(p, p.As) @@ -3670,7 +3767,11 @@ func (c *ctxt7) asmout(p *obj.Prog, o *Optab, out []uint32) { if p.Reg == REGTMP { c.ctxt.Diag("cannot use REGTMP as source: %v\n", p) } - o1 = c.omovconst(AMOVD, p, &p.From, REGTMP) + if isADDWop(p.As) || isANDWop(p.As) { + o1 = c.omovconst(AMOVW, p, &p.From, REGTMP) + } else { + o1 = c.omovconst(AMOVD, p, &p.From, REGTMP) + } rt := int(p.To.Reg) if p.To.Type == obj.TYPE_NONE { @@ -6195,31 +6296,37 @@ func (c *ctxt7) omovconst(as obj.As, p *obj.Prog, a *obj.Addr, rt int) (o1 uint3 return o1 } - r := 32 - if as == AMOVD { - r = 64 - } - d := a.Offset - s := movcon(d) - if s < 0 || s >= r { - d = ^d - s = movcon(d) - if s < 0 || s >= r { - c.ctxt.Diag("impossible move wide: %#x\n%v", uint64(a.Offset), p) - } - if as == AMOVD { - o1 = c.opirr(p, AMOVN) - } else { + if as == AMOVW { + d := uint32(a.Offset) + s := movcon(int64(d)) + if s < 0 || 16*s >= 32 { + d = ^d + s = movcon(int64(d)) + if s < 0 || 16*s >= 32 { + c.ctxt.Diag("impossible 32-bit move wide: %#x\n%v", uint32(a.Offset), p) + } o1 = c.opirr(p, AMOVNW) - } - } else { - if as == AMOVD { - o1 = c.opirr(p, AMOVZ) } else { o1 = c.opirr(p, AMOVZW) } + o1 |= MOVCONST(int64(d), s, rt) } - o1 |= uint32((((d >> uint(s*16)) & 0xFFFF) << 5) | int64((uint32(s)&3)<<21) | int64(rt&31)) + if as == AMOVD { + d := a.Offset + s := movcon(d) + if s < 0 || 16*s >= 64 { + d = ^d + s = movcon(d) + if s < 0 || 16*s >= 64 { + c.ctxt.Diag("impossible 64-bit move wide: %#x\n%v", uint64(a.Offset), p) + } + o1 = c.opirr(p, AMOVN) + } else { + o1 = c.opirr(p, AMOVZ) + } + o1 |= MOVCONST(d, s, rt) + } + return o1 } From dca769dca9bac81a242cb52654b3fe6b7819f759 Mon Sep 17 00:00:00 2001 From: Keith Randall Date: Tue, 16 Oct 2018 14:31:49 -0700 Subject: [PATCH 204/240] cmd/compile: in append(f()), type convert appended items The second and subsequent return values from f() need to be converted to the element type of the first return value from f() (which must be a slice). Fixes #22327 Change-Id: I5c0a424812c82c1b95b6d124c5626cfc4408bdb6 Reviewed-on: https://go-review.googlesource.com/c/142718 Reviewed-by: Matthew Dempsky --- src/cmd/compile/internal/gc/walk.go | 11 ++++++++--- test/fixedbugs/issue22327.go | 18 ++++++++++++++++++ 2 files changed, 26 insertions(+), 3 deletions(-) create mode 100644 test/fixedbugs/issue22327.go diff --git a/src/cmd/compile/internal/gc/walk.go b/src/cmd/compile/internal/gc/walk.go index 41e2ad3589..29d9abd702 100644 --- a/src/cmd/compile/internal/gc/walk.go +++ b/src/cmd/compile/internal/gc/walk.go @@ -2884,6 +2884,8 @@ func walkappend(n *Node, init *Nodes, dst *Node) *Node { } walkexprlistsafe(n.List.Slice()[1:], init) + nsrc := n.List.First() + // walkexprlistsafe will leave OINDEX (s[n]) alone if both s // and n are name or literal, but those may index the slice we're // modifying here. Fix explicitly. @@ -2892,11 +2894,14 @@ func walkappend(n *Node, init *Nodes, dst *Node) *Node { // before we begin to modify the slice in a visible way. ls := n.List.Slice()[1:] for i, n := range ls { - ls[i] = cheapexpr(n, init) + n = cheapexpr(n, init) + if !eqtype(n.Type, nsrc.Type.Elem()) { + n = assignconv(n, nsrc.Type.Elem(), "append") + n = walkexpr(n, init) + } + ls[i] = n } - nsrc := n.List.First() - argc := n.List.Len() - 1 if argc < 1 { return nsrc diff --git a/test/fixedbugs/issue22327.go b/test/fixedbugs/issue22327.go new file mode 100644 index 0000000000..7b21d83402 --- /dev/null +++ b/test/fixedbugs/issue22327.go @@ -0,0 +1,18 @@ +// compile + +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Using a multi-result function as an argument to +// append should compile successfully. Previously there +// was a missing *int -> interface{} conversion that caused +// the compiler to ICE. + +package p + +func f() ([]interface{}, *int) { + return nil, nil +} + +var _ = append(f()) From ffbf479ae1cc8d85022fd74b6ad35b419279b162 Mon Sep 17 00:00:00 2001 From: Alessandro Arzilli Date: Wed, 17 Oct 2018 09:36:06 +0200 Subject: [PATCH 205/240] cmd/compile,cmd/link: remove statictmp variables from symbol table. Removes statictmp variables from debug_info and the final symbol table. Fixes #27800 Change-Id: I302c59a04bc3f460e7085fef241f937bbf30421d Reviewed-on: https://go-review.googlesource.com/c/142577 Run-TryBot: Alessandro Arzilli Run-TryBot: Heschi Kreinick TryBot-Result: Gobot Gobot Reviewed-by: Heschi Kreinick --- src/cmd/link/internal/ld/dwarf.go | 4 +- src/cmd/link/internal/ld/dwarf_test.go | 73 ++++++++++++++++++++++++++ src/cmd/link/internal/ld/symtab.go | 11 ++++ 3 files changed, 87 insertions(+), 1 deletion(-) diff --git a/src/cmd/link/internal/ld/dwarf.go b/src/cmd/link/internal/ld/dwarf.go index 743f4cedd4..827a1d931a 100644 --- a/src/cmd/link/internal/ld/dwarf.go +++ b/src/cmd/link/internal/ld/dwarf.go @@ -863,7 +863,9 @@ func defdwsymb(ctxt *Link, s *sym.Symbol, str string, t SymbolType, v int64, got default: return } - + if ctxt.LinkMode != LinkExternal && isStaticTemp(s.Name) { + return + } dwarfDefineGlobal(ctxt, s, str, v, gotype) case AutoSym, ParamSym, DeletedAutoSym: diff --git a/src/cmd/link/internal/ld/dwarf_test.go b/src/cmd/link/internal/ld/dwarf_test.go index e5d9981590..42b598efef 100644 --- a/src/cmd/link/internal/ld/dwarf_test.go +++ b/src/cmd/link/internal/ld/dwarf_test.go @@ -1062,3 +1062,76 @@ func main() { } } } + +func TestStaticTmp(t *testing.T) { + // Checks that statictmp variables do not appear in debug_info or the + // symbol table. + // Also checks that statictmp variables do not collide with user defined + // variables (issue #25113) + + testenv.MustHaveGoBuild(t) + + if runtime.GOOS == "plan9" { + t.Skip("skipping on plan9; no DWARF symbol table in executables") + } + + dir, err := ioutil.TempDir("", "go-build") + if err != nil { + t.Fatal(err) + } + defer os.RemoveAll(dir) + + const prog = `package main + +var stmp_0 string +var a []int + +func init() { + a = []int{ 7 } +} + +func main() { + println(a[0]) +} +` + + f := gobuild(t, dir, prog, NoOpt) + + defer f.Close() + + d, err := f.DWARF() + if err != nil { + t.Fatalf("error reading DWARF: %v", err) + } + + rdr := d.Reader() + for { + e, err := rdr.Next() + if err != nil { + t.Fatal(err) + } + if e == nil { + break + } + if e.Tag != dwarf.TagVariable { + continue + } + name, ok := e.Val(dwarf.AttrName).(string) + if !ok { + continue + } + if strings.Contains(name, "stmp") { + t.Errorf("statictmp variable found in debug_info: %s at %x", name, e.Offset) + } + } + + syms, err := f.Symbols() + if err != nil { + t.Fatalf("error reading symbols: %v", err) + } + for _, sym := range syms { + if strings.Contains(sym.Name, "stmp") { + t.Errorf("statictmp variable found in symbol table: %s", sym.Name) + } + } +} diff --git a/src/cmd/link/internal/ld/symtab.go b/src/cmd/link/internal/ld/symtab.go index 2a04ef3824..d2737deca5 100644 --- a/src/cmd/link/internal/ld/symtab.go +++ b/src/cmd/link/internal/ld/symtab.go @@ -432,6 +432,10 @@ func (ctxt *Link) symtab() { // just defined above will be first. // hide the specific symbols. for _, s := range ctxt.Syms.Allsym { + if ctxt.LinkMode != LinkExternal && isStaticTemp(s.Name) { + s.Attr |= sym.AttrNotInSymbolTable + } + if !s.Attr.Reachable() || s.Attr.Special() || s.Type != sym.SRODATA { continue } @@ -676,3 +680,10 @@ func (ctxt *Link) symtab() { lastmoduledatap.AddAddr(ctxt.Arch, moduledata) } } + +func isStaticTemp(name string) bool { + if i := strings.LastIndex(name, "/"); i >= 0 { + name = name[i:] + } + return strings.Contains(name, "..stmp_") +} From e9b39417e4448d6001b2707d9cf42bba4673e9ab Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Mon, 22 Oct 2018 10:54:38 -0700 Subject: [PATCH 206/240] go/types: copy embedded methods unchanged when completing interfaces The existing code adjusted the receivers of embedded interface methods to match the embedding interface type. That required cloning (shallow copying) the embedded methods and destroyed their object identity in the process. Don't do this anymore. The consequence to clients is that they might see different methods of an interface having different receiver types; they are always the type of the interface that explicitly declared the method (which is what one usually would want, anyway). Fixes #28282. Change-Id: I2e6f1497f46affdf7510547a64601de3787367db Reviewed-on: https://go-review.googlesource.com/c/143757 Reviewed-by: Alan Donovan --- src/go/types/issues_test.go | 22 ++++++++++++++++++++++ src/go/types/stdlib_test.go | 28 +++++++++++----------------- src/go/types/type.go | 11 +++-------- 3 files changed, 36 insertions(+), 25 deletions(-) diff --git a/src/go/types/issues_test.go b/src/go/types/issues_test.go index f8810b6734..cf489b1c9a 100644 --- a/src/go/types/issues_test.go +++ b/src/go/types/issues_test.go @@ -422,3 +422,25 @@ func TestIssue28005(t *testing.T) { } } } + +func TestIssue28282(t *testing.T) { + // create type interface { error } + et := Universe.Lookup("error").Type() + it := NewInterfaceType(nil, []Type{et}) + it.Complete() + // verify that after completing the interface, the embedded method remains unchanged + want := et.Underlying().(*Interface).Method(0) + got := it.Method(0) + if got != want { + t.Fatalf("%s.Method(0): got %q (%p); want %q (%p)", it, got, got, want, want) + } + // verify that lookup finds the same method in both interfaces (redundant check) + obj, _, _ := LookupFieldOrMethod(et, false, nil, "Error") + if obj != want { + t.Fatalf("%s.Lookup: got %q (%p); want %q (%p)", et, obj, obj, want, want) + } + obj, _, _ = LookupFieldOrMethod(it, false, nil, "Error") + if obj != want { + t.Fatalf("%s.Lookup: got %q (%p); want %q (%p)", it, obj, obj, want, want) + } +} diff --git a/src/go/types/stdlib_test.go b/src/go/types/stdlib_test.go index 6e492b5291..229d203099 100644 --- a/src/go/types/stdlib_test.go +++ b/src/go/types/stdlib_test.go @@ -231,25 +231,19 @@ func typecheck(t *testing.T, path string, filenames []string) { // Perform checks of API invariants. - // The code below fails at the moment - see issue #28282. - // Exit early for now to keep the longtest builder happy. - // TODO(gri) fix this ASAP and uncomment the code below. - - /* - // All Objects have a package, except predeclared ones. - errorError := Universe.Lookup("error").Type().Underlying().(*Interface).ExplicitMethod(0) // (error).Error - for id, obj := range info.Uses { - predeclared := obj == Universe.Lookup(obj.Name()) || obj == errorError - if predeclared == (obj.Pkg() != nil) { - posn := fset.Position(id.Pos()) - if predeclared { - t.Errorf("%s: predeclared object with package: %s", posn, obj) - } else { - t.Errorf("%s: user-defined object without package: %s", posn, obj) - } + // All Objects have a package, except predeclared ones. + errorError := Universe.Lookup("error").Type().Underlying().(*Interface).ExplicitMethod(0) // (error).Error + for id, obj := range info.Uses { + predeclared := obj == Universe.Lookup(obj.Name()) || obj == errorError + if predeclared == (obj.Pkg() != nil) { + posn := fset.Position(id.Pos()) + if predeclared { + t.Errorf("%s: predeclared object with package: %s", posn, obj) + } else { + t.Errorf("%s: user-defined object without package: %s", posn, obj) } } - */ + } } // pkgFilenames returns the list of package filenames for the given directory. diff --git a/src/go/types/type.go b/src/go/types/type.go index 74b6bcfd67..77426ba618 100644 --- a/src/go/types/type.go +++ b/src/go/types/type.go @@ -352,19 +352,14 @@ func (t *Interface) Complete() *Interface { return t } + // collect all methods var allMethods []*Func allMethods = append(allMethods, t.methods...) for _, et := range t.embeddeds { it := et.Underlying().(*Interface) it.Complete() - for _, tm := range it.allMethods { - // Make a copy of the method and adjust its receiver type. - newm := *tm - newmtyp := *tm.typ.(*Signature) - newm.typ = &newmtyp - newmtyp.recv = NewVar(newm.pos, newm.pkg, "", t) - allMethods = append(allMethods, &newm) - } + // copy embedded methods unchanged (see issue #28282) + allMethods = append(allMethods, it.allMethods...) } sort.Sort(byUniqueMethodName(allMethods)) From ddf83eeb2359f28f81bce78a6d4521852d5e6dfe Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Mon, 22 Oct 2018 11:21:38 -0700 Subject: [PATCH 207/240] cmd/compile: s/eqtype/types.Identical/ (fix build) TBR=khr Change-Id: Ia5a08f1acd9f37c466829754990733330264f546 Reviewed-on: https://go-review.googlesource.com/c/143758 Reviewed-by: Robert Griesemer --- src/cmd/compile/internal/gc/walk.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/cmd/compile/internal/gc/walk.go b/src/cmd/compile/internal/gc/walk.go index 29d9abd702..9ec6f8286e 100644 --- a/src/cmd/compile/internal/gc/walk.go +++ b/src/cmd/compile/internal/gc/walk.go @@ -2895,7 +2895,7 @@ func walkappend(n *Node, init *Nodes, dst *Node) *Node { ls := n.List.Slice()[1:] for i, n := range ls { n = cheapexpr(n, init) - if !eqtype(n.Type, nsrc.Type.Elem()) { + if !types.Identical(n.Type, nsrc.Type.Elem()) { n = assignconv(n, nsrc.Type.Elem(), "append") n = walkexpr(n, init) } From b917bdd3ba255cd71ec0aa837215fa296b89eb77 Mon Sep 17 00:00:00 2001 From: Genevieve Luyt Date: Mon, 22 Oct 2018 13:39:13 -0400 Subject: [PATCH 208/240] doc: use the new log functions The log interface was changed in https://golang.org/cl/2419042. Change-Id: I3eaddd8a5cfcae961db16555fb1b0ce6770b6334 Reviewed-on: https://go-review.googlesource.com/c/143777 Reviewed-by: Rob Pike --- doc/effective_go.html | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/doc/effective_go.html b/doc/effective_go.html index 38d09f4c73..5d184b76a9 100644 --- a/doc/effective_go.html +++ b/doc/effective_go.html @@ -2762,7 +2762,7 @@ type Job struct { }

    -The Job type now has the Log, Logf +The Job type now has the Print, Printf, Println and other methods of *log.Logger. We could have given the Logger a field name, of course, but it's not necessary to do so. And now, once @@ -2770,7 +2770,7 @@ initialized, we can log to the Job: 

    -job.Log("starting now...")
+job.Println("starting now...")

    The Logger is a regular field of the Job struct, @@ -2797,8 +2797,8 @@ we would write job.Logger, which would be useful if we wanted to refine the methods of Logger. 

    -func (job *Job) Logf(format string, args ...interface{}) {
-    job.Logger.Logf("%q: %s", job.Command, fmt.Sprintf(format, args...))
+func (job *Job) Printf(format string, args ...interface{}) {
+    job.Logger.Printf("%q: %s", job.Command, fmt.Sprintf(format, args...))
 }

    From 9258c3f93c92d7b66abe84d2452ad1ce4d80ff7e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= Date: Fri, 28 Sep 2018 17:21:57 +0200 Subject: [PATCH 209/240] cmd/go: add AIX operating system This commit adds AIX operating system to cmd/go package for ppc64 architecture. Updates: #25893 Change-Id: I2605d10a7833fa2eb197f6db4a52d5919cf93614 Reviewed-on: https://go-review.googlesource.com/c/138732 Run-TryBot: Tobias Klauser TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/cmd/go/internal/base/signal_unix.go | 2 +- src/cmd/go/internal/work/exec.go | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/src/cmd/go/internal/base/signal_unix.go b/src/cmd/go/internal/base/signal_unix.go index 38490b571b..c109eecadb 100644 --- a/src/cmd/go/internal/base/signal_unix.go +++ b/src/cmd/go/internal/base/signal_unix.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build darwin dragonfly freebsd js linux nacl netbsd openbsd solaris +// +build aix darwin dragonfly freebsd js linux nacl netbsd openbsd solaris package base diff --git a/src/cmd/go/internal/work/exec.go b/src/cmd/go/internal/work/exec.go index 158f5f3b17..6ae263431c 100644 --- a/src/cmd/go/internal/work/exec.go +++ b/src/cmd/go/internal/work/exec.go @@ -1648,6 +1648,7 @@ func (b *Builder) cover(a *Action, dst, src string, varName string) error { var objectMagic = [][]byte{ {'!', '<', 'a', 'r', 'c', 'h', '>', '\n'}, // Package archive + {'<', 'b', 'i', 'g', 'a', 'f', '>', '\n'}, // Package AIX big archive {'\x7F', 'E', 'L', 'F'}, // ELF {0xFE, 0xED, 0xFA, 0xCE}, // Mach-O big-endian 32-bit {0xFE, 0xED, 0xFA, 0xCF}, // Mach-O big-endian 64-bit @@ -1658,6 +1659,8 @@ var objectMagic = [][]byte{ {0x00, 0x00, 0x8a, 0x97}, // Plan 9 amd64 {0x00, 0x00, 0x06, 0x47}, // Plan 9 arm {0x00, 0x61, 0x73, 0x6D}, // WASM + {0x01, 0xDF}, // XCOFF 32bit + {0x01, 0xF7}, // XCOFF 64bit } func isObject(s string) bool { From 553237aa67a3d0624715973a2dd3e4963e61995d Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Mon, 22 Oct 2018 14:07:36 -0700 Subject: [PATCH 210/240] go/types: report error for invalid use of ... in parameter lists The parser accepts ...T types in parameter lists whereever a type is permitted; this matches the syntax and allows for more tolerant parsing and error recovery. go/types on the other hand assumed that the parser would report those errors and assumed any outstanding such errors would be due to otherwise manipulated ASTs leading to invalid ASTs. go/types further assumed that a parameter list (a, b, c ...int) was permitted (a couple of tests used such parameter lists). With this CL, go/types now correctly refuses invalid parameter lists. Fixes #28281. Change-Id: Ib788255f7b7819fdb972c7801bb153a53ce2ddf7 Reviewed-on: https://go-review.googlesource.com/c/143857 Run-TryBot: Robert Griesemer TryBot-Result: Gobot Gobot Reviewed-by: Alan Donovan --- src/go/types/api_test.go | 2 +- src/go/types/testdata/issues.src | 11 +++++++++++ src/go/types/typestring_test.go | 2 +- src/go/types/typexpr.go | 4 ++-- 4 files changed, 15 insertions(+), 4 deletions(-) diff --git a/src/go/types/api_test.go b/src/go/types/api_test.go index 85de9f6079..fe3950a52d 100644 --- a/src/go/types/api_test.go +++ b/src/go/types/api_test.go @@ -262,7 +262,7 @@ func TestTypesInfo(t *testing.T) { `...int`, `[]int`, }, - {`package issue28277_b; func f(a, b, c ...[]struct{})`, + {`package issue28277_b; func f(a, b int, c ...[]struct{})`, `...[]struct{}`, `[][]struct{}`, }, diff --git a/src/go/types/testdata/issues.src b/src/go/types/testdata/issues.src index 13f8309c82..8260f58519 100644 --- a/src/go/types/testdata/issues.src +++ b/src/go/types/testdata/issues.src @@ -302,3 +302,14 @@ var issue27346 = [][n /* ERROR undeclared */ ]int{ } var issue22467 = map[int][... /* ERROR invalid use of ... */ ]int{0: {}} + +// Test that invalid use of ... in parameter lists is recognized +// (issue #28281). +func issue28281a(int, int, ...int) +func issue28281b(a, b int, c ...int) +func issue28281c(a, b, c ... /* ERROR can only use ... with final parameter */ int) +func issue28281d(... /* ERROR can only use ... with final parameter */ int, int) +func issue28281e(a, b, c ... /* ERROR can only use ... with final parameter */ int, d int) +func issue28281f(... /* ERROR can only use ... with final parameter */ int, ... /* ERROR can only use ... with final parameter */ int, int) +func (... /* ERROR expected type */ TT) f() +func issue28281g() (... /* ERROR expected type */ TT) \ No newline at end of file diff --git a/src/go/types/typestring_test.go b/src/go/types/typestring_test.go index 0efb7f0013..3cae4f134a 100644 --- a/src/go/types/typestring_test.go +++ b/src/go/types/typestring_test.go @@ -89,7 +89,7 @@ var independentTestTypes = []testEntry{ dup("func(...int) string"), dup("func(x ...int) string"), dup("func(x ...int) (u string)"), - {"func(x, y ...int) (u string)", "func(x int, y ...int) (u string)"}, + {"func(x int, y ...int) (u string)", "func(x int, y ...int) (u string)"}, // interfaces dup("interface{}"), diff --git a/src/go/types/typexpr.go b/src/go/types/typexpr.go index 0a9c0f13e3..b16bf962cd 100644 --- a/src/go/types/typexpr.go +++ b/src/go/types/typexpr.go @@ -414,10 +414,10 @@ func (check *Checker) collectParams(scope *Scope, list *ast.FieldList, variadicO ftype := field.Type if t, _ := ftype.(*ast.Ellipsis); t != nil { ftype = t.Elt - if variadicOk && i == len(list.List)-1 { + if variadicOk && i == len(list.List)-1 && len(field.Names) <= 1 { variadic = true } else { - check.invalidAST(field.Pos(), "... not permitted") + check.softErrorf(t.Pos(), "can only use ... with final parameter in list") // ignore ... and continue } } From 956af978806749448af86d7e2878405ee0bef94d Mon Sep 17 00:00:00 2001 From: Rob Pike Date: Tue, 23 Oct 2018 07:01:35 +1100 Subject: [PATCH 211/240] encoding/gob: delete out of memory test Now that the library allows much larger data, it can kill machines with less memory. Fixes #28321 Change-Id: I98e1a5fdf812fd75adfb22bf01542423de405fe2 Reviewed-on: https://go-review.googlesource.com/c/143817 Reviewed-by: Ian Lance Taylor Reviewed-by: Dmitri Shuralyov --- src/encoding/gob/encoder_test.go | 22 ---------------------- 1 file changed, 22 deletions(-) diff --git a/src/encoding/gob/encoder_test.go b/src/encoding/gob/encoder_test.go index dc9bbcf35d..825f0d6f03 100644 --- a/src/encoding/gob/encoder_test.go +++ b/src/encoding/gob/encoder_test.go @@ -10,7 +10,6 @@ import ( "fmt" "io/ioutil" "reflect" - "runtime" "strings" "testing" ) @@ -1128,24 +1127,3 @@ func TestBadData(t *testing.T) { } } } - -// TestHugeWriteFails tests that enormous messages trigger an error. -func TestHugeWriteFails(t *testing.T) { - if runtime.GOARCH == "wasm" { - t.Skip("out of memory on wasm") - } - if testing.Short() { - // Requires allocating a monster, so don't do this from all.bash. - t.Skip("skipping huge allocation in short mode") - } - huge := make([]byte, tooBig) - huge[0] = 7 // Make sure it's not all zeros. - buf := new(bytes.Buffer) - err := NewEncoder(buf).Encode(huge) - if err == nil { - t.Fatalf("expected error for huge slice") - } - if !strings.Contains(err.Error(), "message too big") { - t.Fatalf("expected 'too big' error; got %s\n", err.Error()) - } -} From ce4ef9addd0934997c4d1272ccfe8eab4eaaa8d6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= Date: Fri, 28 Sep 2018 17:15:49 +0200 Subject: [PATCH 212/240] cmd/cgo: add AIX operating system This commit adds AIX operating system to cmd/cgo package for ppc64 architecture. It doesn't fully adapt cgo tool to AIX. But it allows to use go tool cgo -godefs which is really usefull for others packages. Update: #25893 Change-Id: I38e289cf0122d143ba100986d08229b51b03ddfc Reviewed-on: https://go-review.googlesource.com/c/138731 Run-TryBot: Tobias Klauser TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/cmd/cgo/gcc.go | 76 +++++++++++++++++++++++++++++++++++++++++++++- src/cmd/cgo/out.go | 21 ++++++++++++- 2 files changed, 95 insertions(+), 2 deletions(-) diff --git a/src/cmd/cgo/gcc.go b/src/cmd/cgo/gcc.go index e3bed86919..45bf90ffc2 100644 --- a/src/cmd/cgo/gcc.go +++ b/src/cmd/cgo/gcc.go @@ -9,6 +9,7 @@ package main import ( "bytes" + "cmd/internal/xcoff" "debug/dwarf" "debug/elf" "debug/macho" @@ -1395,6 +1396,9 @@ func (p *Package) gccCmd() []string { c = append(c, p.GccOptions...) c = append(c, p.gccMachine()...) + if goos == "aix" { + c = append(c, "-maix64") + } c = append(c, "-") //read input from standard input return c } @@ -1681,7 +1685,77 @@ func (p *Package) gccDebug(stdin []byte, nnames int) (d *dwarf.Data, ints []int6 return d, ints, floats, strs } - fatalf("cannot parse gcc output %s as ELF, Mach-O, PE object", gccTmp()) + if f, err := xcoff.Open(gccTmp()); err == nil { + defer f.Close() + d, err := f.DWARF() + if err != nil { + fatalf("cannot load DWARF output from %s: %v", gccTmp(), err) + } + bo := binary.BigEndian + for _, s := range f.Symbols { + switch { + case isDebugInts(s.Name): + if i := int(s.SectionNumber) - 1; 0 <= i && i < len(f.Sections) { + sect := f.Sections[i] + if s.Value < sect.Size { + if sdat, err := sect.Data(); err == nil { + data := sdat[s.Value:] + ints = make([]int64, len(data)/8) + for i := range ints { + ints[i] = int64(bo.Uint64(data[i*8:])) + } + } + } + } + case isDebugFloats(s.Name): + if i := int(s.SectionNumber) - 1; 0 <= i && i < len(f.Sections) { + sect := f.Sections[i] + if s.Value < sect.Size { + if sdat, err := sect.Data(); err == nil { + data := sdat[s.Value:] + floats = make([]float64, len(data)/8) + for i := range floats { + floats[i] = math.Float64frombits(bo.Uint64(data[i*8:])) + } + } + } + } + default: + if n := indexOfDebugStr(s.Name); n != -1 { + if i := int(s.SectionNumber) - 1; 0 <= i && i < len(f.Sections) { + sect := f.Sections[i] + if s.Value < sect.Size { + if sdat, err := sect.Data(); err == nil { + data := sdat[s.Value:] + strdata[n] = string(data) + } + } + } + break + } + if n := indexOfDebugStrlen(s.Name); n != -1 { + if i := int(s.SectionNumber) - 1; 0 <= i && i < len(f.Sections) { + sect := f.Sections[i] + if s.Value < sect.Size { + if sdat, err := sect.Data(); err == nil { + data := sdat[s.Value:] + strlen := bo.Uint64(data[:8]) + if strlen > (1<<(uint(p.IntSize*8)-1) - 1) { // greater than MaxInt? + fatalf("string literal too big") + } + strlens[n] = int(strlen) + } + } + } + break + } + } + } + + buildStrings() + return d, ints, floats, strs + } + fatalf("cannot parse gcc output %s as ELF, Mach-O, PE, XCOFF object", gccTmp()) panic("not reached") } diff --git a/src/cmd/cgo/out.go b/src/cmd/cgo/out.go index 6217bb17a3..8a26d5c063 100644 --- a/src/cmd/cgo/out.go +++ b/src/cmd/cgo/out.go @@ -6,6 +6,7 @@ package main import ( "bytes" + "cmd/internal/xcoff" "debug/elf" "debug/macho" "debug/pe" @@ -312,7 +313,25 @@ func dynimport(obj string) { return } - fatalf("cannot parse %s as ELF, Mach-O or PE", obj) + if f, err := xcoff.Open(obj); err == nil { + sym, err := f.ImportedSymbols() + if err != nil { + fatalf("cannot load imported symbols from XCOFF file %s: %v", obj, err) + } + for _, s := range sym { + fmt.Fprintf(stdout, "//go:cgo_import_dynamic %s %s %q\n", s.Name, s.Name, s.Library) + } + lib, err := f.ImportedLibraries() + if err != nil { + fatalf("cannot load imported libraries from XCOFF file %s: %v", obj, err) + } + for _, l := range lib { + fmt.Fprintf(stdout, "//go:cgo_import_dynamic _ _ %q\n", l) + } + return + } + + fatalf("cannot parse %s as ELF, Mach-O, PE or XCOFF", obj) } // Construct a gcc struct matching the gc argument frame. From cc558fedfbe71222c85ba0ed24dcf873f934bbdb Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Mon, 22 Oct 2018 12:56:01 -0700 Subject: [PATCH 213/240] cmd/go: update private copy of goosList This copies the change to goosList in CL 138115 to the private copy in cmd/go. The change introducing the private copy was apparently not made with Gerrit, but can be seen at https://github.com/golang/vgo/commit/08359e782fb601567c57f56beb540841c2416d92. That change says "This is adapted from code in go/build and the rest of cmd/go. At some point, we should deduplicate them." Doing another copy for now, rather than something more complex involving cmd/dist, pending that deduplication. Change-Id: I9b6e1f63a3a68c002b60a9a97aa367c5cc7801c9 Reviewed-on: https://go-review.googlesource.com/c/143759 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Bryan C. Mills --- src/cmd/go/internal/imports/build.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/cmd/go/internal/imports/build.go b/src/cmd/go/internal/imports/build.go index d1adf9440c..a67d2ebaae 100644 --- a/src/cmd/go/internal/imports/build.go +++ b/src/cmd/go/internal/imports/build.go @@ -207,5 +207,5 @@ func init() { } } -const goosList = "android darwin dragonfly freebsd js linux nacl netbsd openbsd plan9 solaris windows zos " +const goosList = "aix android darwin dragonfly freebsd js linux nacl netbsd openbsd plan9 solaris windows zos " const goarchList = "386 amd64 amd64p32 arm armbe arm64 arm64be ppc64 ppc64le mips mipsle mips64 mips64le mips64p32 mips64p32le ppc riscv riscv64 s390 s390x sparc sparc64 wasm " From 0cc4c2971da80d010af5a3336ad2e7fda06f06a8 Mon Sep 17 00:00:00 2001 From: Alexandre Maari Date: Mon, 15 Oct 2018 13:23:09 -0400 Subject: [PATCH 214/240] text/template: removed truncation of context in error message Fixes #27930 Change-Id: I31ad3fdb74d74152268c59ae4c651cc4c8c1716d Reviewed-on: https://go-review.googlesource.com/c/142217 Reviewed-by: Rob Pike Run-TryBot: Rob Pike TryBot-Result: Gobot Gobot --- src/text/template/parse/parse.go | 3 --- 1 file changed, 3 deletions(-) diff --git a/src/text/template/parse/parse.go b/src/text/template/parse/parse.go index cb9b44e9da..efdad3297c 100644 --- a/src/text/template/parse/parse.go +++ b/src/text/template/parse/parse.go @@ -148,9 +148,6 @@ func (t *Tree) ErrorContext(n Node) (location, context string) { } lineNum := 1 + strings.Count(text, "\n") context = n.String() - if len(context) > 20 { - context = fmt.Sprintf("%.20s...", context) - } return fmt.Sprintf("%s:%d:%d", tree.ParseName, lineNum, byteNum), context } From 47cc59f31f8e2ef18ee34402be7b94cbe39638aa Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Mon, 22 Oct 2018 17:14:36 -0700 Subject: [PATCH 215/240] cmd/dist: copy cmd/internal/xcoff to bootstrap directory Fixes build. Change-Id: Id3d78ae9e4669371b4ebf29f69217d0809ffb829 Reviewed-on: https://go-review.googlesource.com/c/143917 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/cmd/dist/buildtool.go | 1 + 1 file changed, 1 insertion(+) diff --git a/src/cmd/dist/buildtool.go b/src/cmd/dist/buildtool.go index 94b7587026..2058c721c5 100644 --- a/src/cmd/dist/buildtool.go +++ b/src/cmd/dist/buildtool.go @@ -65,6 +65,7 @@ var bootstrapDirs = []string{ "cmd/internal/obj/wasm", "cmd/internal/src", "cmd/internal/sys", + "cmd/internal/xcoff", "cmd/link", "cmd/link/internal/amd64", "cmd/link/internal/arm", From 13d5cd784748f8849c75ec23ed6e3d40dc7d2ce7 Mon Sep 17 00:00:00 2001 From: ChrisALiles Date: Mon, 6 Aug 2018 19:50:38 +1000 Subject: [PATCH 216/240] cmd/compile: use proved bounds to remove signed division fix-ups prove is able to find 94 occurrences in std cmd where a divisor can't have the value -1. The change removes the extraneous fix-up code for these cases. Fixes #25239 Change-Id: Ic184de971f47cc57c702eb72805b8e291c14035d Reviewed-on: https://go-review.googlesource.com/c/130215 Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/cmd/compile/internal/amd64/ssa.go | 89 ++++++++++--------- .../internal/gc/testdata/arith_test.go | 36 ++++++++ src/cmd/compile/internal/ssa/gen/386.rules | 8 +- src/cmd/compile/internal/ssa/gen/386Ops.go | 17 ++-- src/cmd/compile/internal/ssa/gen/AMD64.rules | 4 +- src/cmd/compile/internal/ssa/gen/AMD64Ops.go | 8 +- .../compile/internal/ssa/gen/genericOps.go | 15 ++-- src/cmd/compile/internal/ssa/opGen.go | 13 +++ src/cmd/compile/internal/ssa/prove.go | 23 +++++ src/cmd/compile/internal/ssa/rewrite.go | 10 +++ src/cmd/compile/internal/ssa/rewrite386.go | 24 +++-- src/cmd/compile/internal/ssa/rewriteAMD64.go | 36 +++++--- src/cmd/compile/internal/x86/ssa.go | 33 ++++--- test/codegen/arithmetic.go | 81 +++++++++++++++++ 14 files changed, 299 insertions(+), 98 deletions(-) diff --git a/src/cmd/compile/internal/amd64/ssa.go b/src/cmd/compile/internal/amd64/ssa.go index 5b776170d7..749dbf1d5d 100644 --- a/src/cmd/compile/internal/amd64/ssa.go +++ b/src/cmd/compile/internal/amd64/ssa.go @@ -229,24 +229,27 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { // Result[0] (the quotient) is in AX. // Result[1] (the remainder) is in DX. r := v.Args[1].Reg() + var j1 *obj.Prog // CPU faults upon signed overflow, which occurs when the most // negative int is divided by -1. Handle divide by -1 as a special case. - var c *obj.Prog - switch v.Op { - case ssa.OpAMD64DIVQ: - c = s.Prog(x86.ACMPQ) - case ssa.OpAMD64DIVL: - c = s.Prog(x86.ACMPL) - case ssa.OpAMD64DIVW: - c = s.Prog(x86.ACMPW) + if ssa.NeedsFixUp(v) { + var c *obj.Prog + switch v.Op { + case ssa.OpAMD64DIVQ: + c = s.Prog(x86.ACMPQ) + case ssa.OpAMD64DIVL: + c = s.Prog(x86.ACMPL) + case ssa.OpAMD64DIVW: + c = s.Prog(x86.ACMPW) + } + c.From.Type = obj.TYPE_REG + c.From.Reg = r + c.To.Type = obj.TYPE_CONST + c.To.Offset = -1 + j1 = s.Prog(x86.AJEQ) + j1.To.Type = obj.TYPE_BRANCH } - c.From.Type = obj.TYPE_REG - c.From.Reg = r - c.To.Type = obj.TYPE_CONST - c.To.Offset = -1 - j1 := s.Prog(x86.AJEQ) - j1.To.Type = obj.TYPE_BRANCH // Sign extend dividend. switch v.Op { @@ -263,36 +266,38 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { p.From.Type = obj.TYPE_REG p.From.Reg = r - // Skip over -1 fixup code. - j2 := s.Prog(obj.AJMP) - j2.To.Type = obj.TYPE_BRANCH + if j1 != nil { + // Skip over -1 fixup code. + j2 := s.Prog(obj.AJMP) + j2.To.Type = obj.TYPE_BRANCH - // Issue -1 fixup code. - // n / -1 = -n - var n1 *obj.Prog - switch v.Op { - case ssa.OpAMD64DIVQ: - n1 = s.Prog(x86.ANEGQ) - case ssa.OpAMD64DIVL: - n1 = s.Prog(x86.ANEGL) - case ssa.OpAMD64DIVW: - n1 = s.Prog(x86.ANEGW) + // Issue -1 fixup code. + // n / -1 = -n + var n1 *obj.Prog + switch v.Op { + case ssa.OpAMD64DIVQ: + n1 = s.Prog(x86.ANEGQ) + case ssa.OpAMD64DIVL: + n1 = s.Prog(x86.ANEGL) + case ssa.OpAMD64DIVW: + n1 = s.Prog(x86.ANEGW) + } + n1.To.Type = obj.TYPE_REG + n1.To.Reg = x86.REG_AX + + // n % -1 == 0 + n2 := s.Prog(x86.AXORL) + n2.From.Type = obj.TYPE_REG + n2.From.Reg = x86.REG_DX + n2.To.Type = obj.TYPE_REG + n2.To.Reg = x86.REG_DX + + // TODO(khr): issue only the -1 fixup code we need. + // For instance, if only the quotient is used, no point in zeroing the remainder. + + j1.To.Val = n1 + j2.To.Val = s.Pc() } - n1.To.Type = obj.TYPE_REG - n1.To.Reg = x86.REG_AX - - // n % -1 == 0 - n2 := s.Prog(x86.AXORL) - n2.From.Type = obj.TYPE_REG - n2.From.Reg = x86.REG_DX - n2.To.Type = obj.TYPE_REG - n2.To.Reg = x86.REG_DX - - // TODO(khr): issue only the -1 fixup code we need. - // For instance, if only the quotient is used, no point in zeroing the remainder. - - j1.To.Val = n1 - j2.To.Val = s.Pc() case ssa.OpAMD64HMULQ, ssa.OpAMD64HMULL, ssa.OpAMD64HMULQU, ssa.OpAMD64HMULLU: // the frontend rewrites constant division by 8/16/32 bit integers into diff --git a/src/cmd/compile/internal/gc/testdata/arith_test.go b/src/cmd/compile/internal/gc/testdata/arith_test.go index d30d660b34..728ca56892 100644 --- a/src/cmd/compile/internal/gc/testdata/arith_test.go +++ b/src/cmd/compile/internal/gc/testdata/arith_test.go @@ -7,6 +7,7 @@ package main import ( + "runtime" "testing" ) @@ -14,6 +15,13 @@ const ( y = 0x0fffFFFF ) +var ( + g8 int8 + g16 int16 + g32 int32 + g64 int64 +) + //go:noinline func lshNop1(x uint64) uint64 { // two outer shifts should be removed @@ -915,4 +923,32 @@ func TestArithmetic(t *testing.T) { testLoadSymCombine(t) testShiftRemoval(t) testShiftedOps(t) + testDivFixUp(t) +} + +// testDivFixUp ensures that signed division fix-ups are being generated. +func testDivFixUp(t *testing.T) { + defer func() { + if r := recover(); r != nil { + t.Error("testDivFixUp failed") + if e, ok := r.(runtime.Error); ok { + t.Logf("%v\n", e.Error()) + } + } + }() + var w int8 = -128 + var x int16 = -32768 + var y int32 = -2147483648 + var z int64 = -9223372036854775808 + + for i := -5; i < 0; i++ { + g8 = w / int8(i) + g16 = x / int16(i) + g32 = y / int32(i) + g64 = z / int64(i) + g8 = w % int8(i) + g16 = x % int16(i) + g32 = y % int32(i) + g64 = z % int64(i) + } } diff --git a/src/cmd/compile/internal/ssa/gen/386.rules b/src/cmd/compile/internal/ssa/gen/386.rules index 2241a65d55..e1680ec37c 100644 --- a/src/cmd/compile/internal/ssa/gen/386.rules +++ b/src/cmd/compile/internal/ssa/gen/386.rules @@ -25,9 +25,9 @@ (Div32F x y) -> (DIVSS x y) (Div64F x y) -> (DIVSD x y) -(Div32 x y) -> (DIVL x y) +(Div32 [a] x y) -> (DIVL [a] x y) (Div32u x y) -> (DIVLU x y) -(Div16 x y) -> (DIVW x y) +(Div16 [a] x y) -> (DIVW [a] x y) (Div16u x y) -> (DIVWU x y) (Div8 x y) -> (DIVW (SignExt8to16 x) (SignExt8to16 y)) (Div8u x y) -> (DIVWU (ZeroExt8to16 x) (ZeroExt8to16 y)) @@ -35,9 +35,9 @@ (Hmul32 x y) -> (HMULL x y) (Hmul32u x y) -> (HMULLU x y) -(Mod32 x y) -> (MODL x y) +(Mod32 [a] x y) -> (MODL [a] x y) (Mod32u x y) -> (MODLU x y) -(Mod16 x y) -> (MODW x y) +(Mod16 [a] x y) -> (MODW [a] x y) (Mod16u x y) -> (MODWU x y) (Mod8 x y) -> (MODW (SignExt8to16 x) (SignExt8to16 y)) (Mod8u x y) -> (MODWU (ZeroExt8to16 x) (ZeroExt8to16 y)) diff --git a/src/cmd/compile/internal/ssa/gen/386Ops.go b/src/cmd/compile/internal/ssa/gen/386Ops.go index cb2919567f..fa3e7cd375 100644 --- a/src/cmd/compile/internal/ssa/gen/386Ops.go +++ b/src/cmd/compile/internal/ssa/gen/386Ops.go @@ -216,15 +216,16 @@ func init() { {name: "AVGLU", argLength: 2, reg: gp21, commutative: true, resultInArg0: true, clobberFlags: true}, // (arg0 + arg1) / 2 as unsigned, all 32 result bits - {name: "DIVL", argLength: 2, reg: gp11div, asm: "IDIVL", clobberFlags: true}, // arg0 / arg1 - {name: "DIVW", argLength: 2, reg: gp11div, asm: "IDIVW", clobberFlags: true}, // arg0 / arg1 - {name: "DIVLU", argLength: 2, reg: gp11div, asm: "DIVL", clobberFlags: true}, // arg0 / arg1 - {name: "DIVWU", argLength: 2, reg: gp11div, asm: "DIVW", clobberFlags: true}, // arg0 / arg1 + // For DIVL, DIVW, MODL and MODW, AuxInt non-zero means that the divisor has been proved to be not -1. + {name: "DIVL", argLength: 2, reg: gp11div, asm: "IDIVL", aux: "Bool", clobberFlags: true}, // arg0 / arg1 + {name: "DIVW", argLength: 2, reg: gp11div, asm: "IDIVW", aux: "Bool", clobberFlags: true}, // arg0 / arg1 + {name: "DIVLU", argLength: 2, reg: gp11div, asm: "DIVL", clobberFlags: true}, // arg0 / arg1 + {name: "DIVWU", argLength: 2, reg: gp11div, asm: "DIVW", clobberFlags: true}, // arg0 / arg1 - {name: "MODL", argLength: 2, reg: gp11mod, asm: "IDIVL", clobberFlags: true}, // arg0 % arg1 - {name: "MODW", argLength: 2, reg: gp11mod, asm: "IDIVW", clobberFlags: true}, // arg0 % arg1 - {name: "MODLU", argLength: 2, reg: gp11mod, asm: "DIVL", clobberFlags: true}, // arg0 % arg1 - {name: "MODWU", argLength: 2, reg: gp11mod, asm: "DIVW", clobberFlags: true}, // arg0 % arg1 + {name: "MODL", argLength: 2, reg: gp11mod, asm: "IDIVL", aux: "Bool", clobberFlags: true}, // arg0 % arg1 + {name: "MODW", argLength: 2, reg: gp11mod, asm: "IDIVW", aux: "Bool", clobberFlags: true}, // arg0 % arg1 + {name: "MODLU", argLength: 2, reg: gp11mod, asm: "DIVL", clobberFlags: true}, // arg0 % arg1 + {name: "MODWU", argLength: 2, reg: gp11mod, asm: "DIVW", clobberFlags: true}, // arg0 % arg1 {name: "ANDL", argLength: 2, reg: gp21, asm: "ANDL", commutative: true, resultInArg0: true, clobberFlags: true}, // arg0 & arg1 {name: "ANDLconst", argLength: 1, reg: gp11, asm: "ANDL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 & auxint diff --git a/src/cmd/compile/internal/ssa/gen/AMD64.rules b/src/cmd/compile/internal/ssa/gen/AMD64.rules index 7bba4bcccb..86f7d921e4 100644 --- a/src/cmd/compile/internal/ssa/gen/AMD64.rules +++ b/src/cmd/compile/internal/ssa/gen/AMD64.rules @@ -23,7 +23,7 @@ (Hmul(64|32) x y) -> (HMUL(Q|L) x y) (Hmul(64|32)u x y) -> (HMUL(Q|L)U x y) -(Div(64|32|16) x y) -> (Select0 (DIV(Q|L|W) x y)) +(Div(64|32|16) [a] x y) -> (Select0 (DIV(Q|L|W) [a] x y)) (Div8 x y) -> (Select0 (DIVW (SignExt8to16 x) (SignExt8to16 y))) (Div(64|32|16)u x y) -> (Select0 (DIV(Q|L|W)U x y)) (Div8u x y) -> (Select0 (DIVWU (ZeroExt8to16 x) (ZeroExt8to16 y))) @@ -34,7 +34,7 @@ (Avg64u x y) -> (AVGQU x y) -(Mod(64|32|16) x y) -> (Select1 (DIV(Q|L|W) x y)) +(Mod(64|32|16) [a] x y) -> (Select1 (DIV(Q|L|W) [a] x y)) (Mod8 x y) -> (Select1 (DIVW (SignExt8to16 x) (SignExt8to16 y))) (Mod(64|32|16)u x y) -> (Select1 (DIV(Q|L|W)U x y)) (Mod8u x y) -> (Select1 (DIVWU (ZeroExt8to16 x) (ZeroExt8to16 y))) diff --git a/src/cmd/compile/internal/ssa/gen/AMD64Ops.go b/src/cmd/compile/internal/ssa/gen/AMD64Ops.go index cd6eb53460..29f208f0d0 100644 --- a/src/cmd/compile/internal/ssa/gen/AMD64Ops.go +++ b/src/cmd/compile/internal/ssa/gen/AMD64Ops.go @@ -220,9 +220,11 @@ func init() { {name: "AVGQU", argLength: 2, reg: gp21, commutative: true, resultInArg0: true, clobberFlags: true}, // (arg0 + arg1) / 2 as unsigned, all 64 result bits - {name: "DIVQ", argLength: 2, reg: gp11div, typ: "(Int64,Int64)", asm: "IDIVQ", clobberFlags: true}, // [arg0 / arg1, arg0 % arg1] - {name: "DIVL", argLength: 2, reg: gp11div, typ: "(Int32,Int32)", asm: "IDIVL", clobberFlags: true}, // [arg0 / arg1, arg0 % arg1] - {name: "DIVW", argLength: 2, reg: gp11div, typ: "(Int16,Int16)", asm: "IDIVW", clobberFlags: true}, // [arg0 / arg1, arg0 % arg1] + // For DIVQ, DIVL and DIVW, AuxInt non-zero means that the divisor has been proved to be not -1. + {name: "DIVQ", argLength: 2, reg: gp11div, typ: "(Int64,Int64)", asm: "IDIVQ", aux: "Bool", clobberFlags: true}, // [arg0 / arg1, arg0 % arg1] + {name: "DIVL", argLength: 2, reg: gp11div, typ: "(Int32,Int32)", asm: "IDIVL", aux: "Bool", clobberFlags: true}, // [arg0 / arg1, arg0 % arg1] + {name: "DIVW", argLength: 2, reg: gp11div, typ: "(Int16,Int16)", asm: "IDIVW", aux: "Bool", clobberFlags: true}, // [arg0 / arg1, arg0 % arg1] + {name: "DIVQU", argLength: 2, reg: gp11div, typ: "(UInt64,UInt64)", asm: "DIVQ", clobberFlags: true}, // [arg0 / arg1, arg0 % arg1] {name: "DIVLU", argLength: 2, reg: gp11div, typ: "(UInt32,UInt32)", asm: "DIVL", clobberFlags: true}, // [arg0 / arg1, arg0 % arg1] {name: "DIVWU", argLength: 2, reg: gp11div, typ: "(UInt16,UInt16)", asm: "DIVW", clobberFlags: true}, // [arg0 / arg1, arg0 % arg1] diff --git a/src/cmd/compile/internal/ssa/gen/genericOps.go b/src/cmd/compile/internal/ssa/gen/genericOps.go index 58f1b5bf79..2f28ed45d0 100644 --- a/src/cmd/compile/internal/ssa/gen/genericOps.go +++ b/src/cmd/compile/internal/ssa/gen/genericOps.go @@ -66,23 +66,26 @@ var genericOps = []opData{ {name: "Avg32u", argLength: 2, typ: "UInt32"}, // 32-bit platforms only {name: "Avg64u", argLength: 2, typ: "UInt64"}, // 64-bit platforms only + // For Div16, Div32 and Div64, AuxInt non-zero means that the divisor has been proved to be not -1 + // or that the dividend is not the most negative value. {name: "Div8", argLength: 2}, // arg0 / arg1, signed {name: "Div8u", argLength: 2}, // arg0 / arg1, unsigned - {name: "Div16", argLength: 2}, + {name: "Div16", argLength: 2, aux: "Bool"}, {name: "Div16u", argLength: 2}, - {name: "Div32", argLength: 2}, + {name: "Div32", argLength: 2, aux: "Bool"}, {name: "Div32u", argLength: 2}, - {name: "Div64", argLength: 2}, + {name: "Div64", argLength: 2, aux: "Bool"}, {name: "Div64u", argLength: 2}, {name: "Div128u", argLength: 3}, // arg0:arg1 / arg2 (128-bit divided by 64-bit), returns (q, r) + // For Mod16, Mod32 and Mod64, AuxInt non-zero means that the divisor has been proved to be not -1. {name: "Mod8", argLength: 2}, // arg0 % arg1, signed {name: "Mod8u", argLength: 2}, // arg0 % arg1, unsigned - {name: "Mod16", argLength: 2}, + {name: "Mod16", argLength: 2, aux: "Bool"}, {name: "Mod16u", argLength: 2}, - {name: "Mod32", argLength: 2}, + {name: "Mod32", argLength: 2, aux: "Bool"}, {name: "Mod32u", argLength: 2}, - {name: "Mod64", argLength: 2}, + {name: "Mod64", argLength: 2, aux: "Bool"}, {name: "Mod64u", argLength: 2}, {name: "And8", argLength: 2, commutative: true}, // arg0 & arg1 diff --git a/src/cmd/compile/internal/ssa/opGen.go b/src/cmd/compile/internal/ssa/opGen.go index 082b6e1ba7..ad6c151d1d 100644 --- a/src/cmd/compile/internal/ssa/opGen.go +++ b/src/cmd/compile/internal/ssa/opGen.go @@ -3216,6 +3216,7 @@ var opcodeTable = [...]opInfo{ }, { name: "DIVL", + auxType: auxBool, argLen: 2, clobberFlags: true, asm: x86.AIDIVL, @@ -3232,6 +3233,7 @@ var opcodeTable = [...]opInfo{ }, { name: "DIVW", + auxType: auxBool, argLen: 2, clobberFlags: true, asm: x86.AIDIVW, @@ -3280,6 +3282,7 @@ var opcodeTable = [...]opInfo{ }, { name: "MODL", + auxType: auxBool, argLen: 2, clobberFlags: true, asm: x86.AIDIVL, @@ -3296,6 +3299,7 @@ var opcodeTable = [...]opInfo{ }, { name: "MODW", + auxType: auxBool, argLen: 2, clobberFlags: true, asm: x86.AIDIVW, @@ -6436,6 +6440,7 @@ var opcodeTable = [...]opInfo{ }, { name: "DIVQ", + auxType: auxBool, argLen: 2, clobberFlags: true, asm: x86.AIDIVQ, @@ -6452,6 +6457,7 @@ var opcodeTable = [...]opInfo{ }, { name: "DIVL", + auxType: auxBool, argLen: 2, clobberFlags: true, asm: x86.AIDIVL, @@ -6468,6 +6474,7 @@ var opcodeTable = [...]opInfo{ }, { name: "DIVW", + auxType: auxBool, argLen: 2, clobberFlags: true, asm: x86.AIDIVW, @@ -28022,6 +28029,7 @@ var opcodeTable = [...]opInfo{ }, { name: "Div16", + auxType: auxBool, argLen: 2, generic: true, }, @@ -28032,6 +28040,7 @@ var opcodeTable = [...]opInfo{ }, { name: "Div32", + auxType: auxBool, argLen: 2, generic: true, }, @@ -28042,6 +28051,7 @@ var opcodeTable = [...]opInfo{ }, { name: "Div64", + auxType: auxBool, argLen: 2, generic: true, }, @@ -28067,6 +28077,7 @@ var opcodeTable = [...]opInfo{ }, { name: "Mod16", + auxType: auxBool, argLen: 2, generic: true, }, @@ -28077,6 +28088,7 @@ var opcodeTable = [...]opInfo{ }, { name: "Mod32", + auxType: auxBool, argLen: 2, generic: true, }, @@ -28087,6 +28099,7 @@ var opcodeTable = [...]opInfo{ }, { name: "Mod64", + auxType: auxBool, argLen: 2, generic: true, }, diff --git a/src/cmd/compile/internal/ssa/prove.go b/src/cmd/compile/internal/ssa/prove.go index 6462370d5c..0656bb45c5 100644 --- a/src/cmd/compile/internal/ssa/prove.go +++ b/src/cmd/compile/internal/ssa/prove.go @@ -1076,6 +1076,13 @@ func addLocalInductiveFacts(ft *factsTable, b *Block) { } var ctzNonZeroOp = map[Op]Op{OpCtz8: OpCtz8NonZero, OpCtz16: OpCtz16NonZero, OpCtz32: OpCtz32NonZero, OpCtz64: OpCtz64NonZero} +var mostNegativeDividend = map[Op]int64{ + OpDiv16: -1 << 15, + OpMod16: -1 << 15, + OpDiv32: -1 << 31, + OpMod32: -1 << 31, + OpDiv64: -1 << 63, + OpMod64: -1 << 63} // simplifyBlock simplifies some constant values in b and evaluates // branches to non-uniquely dominated successors of b. @@ -1147,6 +1154,22 @@ func simplifyBlock(sdom SparseTree, ft *factsTable, b *Block) { b.Func.Warnl(v.Pos, "Proved %v bounded", v.Op) } } + case OpDiv16, OpDiv32, OpDiv64, OpMod16, OpMod32, OpMod64: + // On amd64 and 386 fix-up code can be avoided if we know + // the divisor is not -1 or the dividend > MinIntNN. + divr := v.Args[1] + divrLim, divrLimok := ft.limits[divr.ID] + divd := v.Args[0] + divdLim, divdLimok := ft.limits[divd.ID] + if (divrLimok && (divrLim.max < -1 || divrLim.min > -1)) || + (divdLimok && divdLim.min > mostNegativeDividend[v.Op]) { + v.AuxInt = 1 // see NeedsFixUp in genericOps - v.AuxInt = 0 means we have not proved + // that the divisor is not -1 and the dividend is not the most negative, + // so we need to add fix-up code. + if b.Func.pass.debug > 0 { + b.Func.Warnl(v.Pos, "Proved %v does not need fix-up", v.Op) + } + } } } diff --git a/src/cmd/compile/internal/ssa/rewrite.go b/src/cmd/compile/internal/ssa/rewrite.go index b93dce2004..ae6af1c269 100644 --- a/src/cmd/compile/internal/ssa/rewrite.go +++ b/src/cmd/compile/internal/ssa/rewrite.go @@ -451,6 +451,16 @@ func extend32Fto64F(f float32) float64 { return math.Float64frombits(r) } +// NeedsFixUp reports whether the division needs fix-up code. +func NeedsFixUp(v *Value) bool { + return v.AuxInt == 0 +} + +// i2f is used in rules for converting from an AuxInt to a float. +func i2f(i int64) float64 { + return math.Float64frombits(uint64(i)) +} + // auxFrom64F encodes a float64 value so it can be stored in an AuxInt. func auxFrom64F(f float64) int64 { return int64(math.Float64bits(f)) diff --git a/src/cmd/compile/internal/ssa/rewrite386.go b/src/cmd/compile/internal/ssa/rewrite386.go index 61bdfcbcbb..70aa51f3d1 100644 --- a/src/cmd/compile/internal/ssa/rewrite386.go +++ b/src/cmd/compile/internal/ssa/rewrite386.go @@ -21554,14 +21554,16 @@ func rewriteValue386_OpCvt64Fto32F_0(v *Value) bool { } } func rewriteValue386_OpDiv16_0(v *Value) bool { - // match: (Div16 x y) + // match: (Div16 [a] x y) // cond: - // result: (DIVW x y) + // result: (DIVW [a] x y) for { + a := v.AuxInt _ = v.Args[1] x := v.Args[0] y := v.Args[1] v.reset(Op386DIVW) + v.AuxInt = a v.AddArg(x) v.AddArg(y) return true @@ -21582,14 +21584,16 @@ func rewriteValue386_OpDiv16u_0(v *Value) bool { } } func rewriteValue386_OpDiv32_0(v *Value) bool { - // match: (Div32 x y) + // match: (Div32 [a] x y) // cond: - // result: (DIVL x y) + // result: (DIVL [a] x y) for { + a := v.AuxInt _ = v.Args[1] x := v.Args[0] y := v.Args[1] v.reset(Op386DIVL) + v.AuxInt = a v.AddArg(x) v.AddArg(y) return true @@ -22957,14 +22961,16 @@ func rewriteValue386_OpLsh8x8_0(v *Value) bool { } } func rewriteValue386_OpMod16_0(v *Value) bool { - // match: (Mod16 x y) + // match: (Mod16 [a] x y) // cond: - // result: (MODW x y) + // result: (MODW [a] x y) for { + a := v.AuxInt _ = v.Args[1] x := v.Args[0] y := v.Args[1] v.reset(Op386MODW) + v.AuxInt = a v.AddArg(x) v.AddArg(y) return true @@ -22985,14 +22991,16 @@ func rewriteValue386_OpMod16u_0(v *Value) bool { } } func rewriteValue386_OpMod32_0(v *Value) bool { - // match: (Mod32 x y) + // match: (Mod32 [a] x y) // cond: - // result: (MODL x y) + // result: (MODL [a] x y) for { + a := v.AuxInt _ = v.Args[1] x := v.Args[0] y := v.Args[1] v.reset(Op386MODL) + v.AuxInt = a v.AddArg(x) v.AddArg(y) return true diff --git a/src/cmd/compile/internal/ssa/rewriteAMD64.go b/src/cmd/compile/internal/ssa/rewriteAMD64.go index c7aa87b956..09d17e00c8 100644 --- a/src/cmd/compile/internal/ssa/rewriteAMD64.go +++ b/src/cmd/compile/internal/ssa/rewriteAMD64.go @@ -59791,15 +59791,17 @@ func rewriteValueAMD64_OpDiv16_0(v *Value) bool { _ = b typ := &b.Func.Config.Types _ = typ - // match: (Div16 x y) + // match: (Div16 [a] x y) // cond: - // result: (Select0 (DIVW x y)) + // result: (Select0 (DIVW [a] x y)) for { + a := v.AuxInt _ = v.Args[1] x := v.Args[0] y := v.Args[1] v.reset(OpSelect0) v0 := b.NewValue0(v.Pos, OpAMD64DIVW, types.NewTuple(typ.Int16, typ.Int16)) + v0.AuxInt = a v0.AddArg(x) v0.AddArg(y) v.AddArg(v0) @@ -59831,15 +59833,17 @@ func rewriteValueAMD64_OpDiv32_0(v *Value) bool { _ = b typ := &b.Func.Config.Types _ = typ - // match: (Div32 x y) + // match: (Div32 [a] x y) // cond: - // result: (Select0 (DIVL x y)) + // result: (Select0 (DIVL [a] x y)) for { + a := v.AuxInt _ = v.Args[1] x := v.Args[0] y := v.Args[1] v.reset(OpSelect0) v0 := b.NewValue0(v.Pos, OpAMD64DIVL, types.NewTuple(typ.Int32, typ.Int32)) + v0.AuxInt = a v0.AddArg(x) v0.AddArg(y) v.AddArg(v0) @@ -59885,15 +59889,17 @@ func rewriteValueAMD64_OpDiv64_0(v *Value) bool { _ = b typ := &b.Func.Config.Types _ = typ - // match: (Div64 x y) + // match: (Div64 [a] x y) // cond: - // result: (Select0 (DIVQ x y)) + // result: (Select0 (DIVQ [a] x y)) for { + a := v.AuxInt _ = v.Args[1] x := v.Args[0] y := v.Args[1] v.reset(OpSelect0) v0 := b.NewValue0(v.Pos, OpAMD64DIVQ, types.NewTuple(typ.Int64, typ.Int64)) + v0.AuxInt = a v0.AddArg(x) v0.AddArg(y) v.AddArg(v0) @@ -61971,15 +61977,17 @@ func rewriteValueAMD64_OpMod16_0(v *Value) bool { _ = b typ := &b.Func.Config.Types _ = typ - // match: (Mod16 x y) + // match: (Mod16 [a] x y) // cond: - // result: (Select1 (DIVW x y)) + // result: (Select1 (DIVW [a] x y)) for { + a := v.AuxInt _ = v.Args[1] x := v.Args[0] y := v.Args[1] v.reset(OpSelect1) v0 := b.NewValue0(v.Pos, OpAMD64DIVW, types.NewTuple(typ.Int16, typ.Int16)) + v0.AuxInt = a v0.AddArg(x) v0.AddArg(y) v.AddArg(v0) @@ -62011,15 +62019,17 @@ func rewriteValueAMD64_OpMod32_0(v *Value) bool { _ = b typ := &b.Func.Config.Types _ = typ - // match: (Mod32 x y) + // match: (Mod32 [a] x y) // cond: - // result: (Select1 (DIVL x y)) + // result: (Select1 (DIVL [a] x y)) for { + a := v.AuxInt _ = v.Args[1] x := v.Args[0] y := v.Args[1] v.reset(OpSelect1) v0 := b.NewValue0(v.Pos, OpAMD64DIVL, types.NewTuple(typ.Int32, typ.Int32)) + v0.AuxInt = a v0.AddArg(x) v0.AddArg(y) v.AddArg(v0) @@ -62051,15 +62061,17 @@ func rewriteValueAMD64_OpMod64_0(v *Value) bool { _ = b typ := &b.Func.Config.Types _ = typ - // match: (Mod64 x y) + // match: (Mod64 [a] x y) // cond: - // result: (Select1 (DIVQ x y)) + // result: (Select1 (DIVQ [a] x y)) for { + a := v.AuxInt _ = v.Args[1] x := v.Args[0] y := v.Args[1] v.reset(OpSelect1) v0 := b.NewValue0(v.Pos, OpAMD64DIVQ, types.NewTuple(typ.Int64, typ.Int64)) + v0.AuxInt = a v0.AddArg(x) v0.AddArg(y) v.AddArg(v0) diff --git a/src/cmd/compile/internal/x86/ssa.go b/src/cmd/compile/internal/x86/ssa.go index 8a6f015854..24ba9649be 100644 --- a/src/cmd/compile/internal/x86/ssa.go +++ b/src/cmd/compile/internal/x86/ssa.go @@ -198,24 +198,31 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { if v.Op == ssa.Op386DIVL || v.Op == ssa.Op386DIVW || v.Op == ssa.Op386MODL || v.Op == ssa.Op386MODW { - var c *obj.Prog + if ssa.NeedsFixUp(v) { + var c *obj.Prog + switch v.Op { + case ssa.Op386DIVL, ssa.Op386MODL: + c = s.Prog(x86.ACMPL) + j = s.Prog(x86.AJEQ) + + case ssa.Op386DIVW, ssa.Op386MODW: + c = s.Prog(x86.ACMPW) + j = s.Prog(x86.AJEQ) + } + c.From.Type = obj.TYPE_REG + c.From.Reg = x + c.To.Type = obj.TYPE_CONST + c.To.Offset = -1 + + j.To.Type = obj.TYPE_BRANCH + } + // sign extend the dividend switch v.Op { case ssa.Op386DIVL, ssa.Op386MODL: - c = s.Prog(x86.ACMPL) - j = s.Prog(x86.AJEQ) - s.Prog(x86.ACDQ) //TODO: fix - + s.Prog(x86.ACDQ) case ssa.Op386DIVW, ssa.Op386MODW: - c = s.Prog(x86.ACMPW) - j = s.Prog(x86.AJEQ) s.Prog(x86.ACWD) } - c.From.Type = obj.TYPE_REG - c.From.Reg = x - c.To.Type = obj.TYPE_CONST - c.To.Offset = -1 - - j.To.Type = obj.TYPE_BRANCH } // for unsigned ints, we sign extend by setting DX = 0 diff --git a/test/codegen/arithmetic.go b/test/codegen/arithmetic.go index d91eb16edb..c65fb0144a 100644 --- a/test/codegen/arithmetic.go +++ b/test/codegen/arithmetic.go @@ -181,6 +181,87 @@ func ConstMods(n1 uint, n2 int) (uint, int) { return a, b } +// Check that fix-up code is not generated for divisions where it has been proven that +// that the divisor is not -1 or that the dividend is > MinIntNN. +func NoFix64A(divr int64) (int64, int64) { + var d int64 = 42 + var e int64 = 84 + if divr > 5 { + d /= divr // amd64:-"JMP" + e %= divr // amd64:-"JMP" + } + return d, e +} + +func NoFix64B(divd int64) (int64, int64) { + var d int64 + var e int64 + var divr int64 = -1 + if divd > -9223372036854775808 { + d = divd / divr // amd64:-"JMP" + e = divd % divr // amd64:-"JMP" + } + return d, e +} + +func NoFix32A(divr int32) (int32, int32) { + var d int32 = 42 + var e int32 = 84 + if divr > 5 { + // amd64:-"JMP" + // 386:-"JMP" + d /= divr + // amd64:-"JMP" + // 386:-"JMP" + e %= divr + } + return d, e +} + +func NoFix32B(divd int32) (int32, int32) { + var d int32 + var e int32 + var divr int32 = -1 + if divd > -2147483648 { + // amd64:-"JMP" + // 386:-"JMP" + d = divd / divr + // amd64:-"JMP" + // 386:-"JMP" + e = divd % divr + } + return d, e +} + +func NoFix16A(divr int16) (int16, int16) { + var d int16 = 42 + var e int16 = 84 + if divr > 5 { + // amd64:-"JMP" + // 386:-"JMP" + d /= divr + // amd64:-"JMP" + // 386:-"JMP" + e %= divr + } + return d, e +} + +func NoFix16B(divd int16) (int16, int16) { + var d int16 + var e int16 + var divr int16 = -1 + if divd > -32768 { + // amd64:-"JMP" + // 386:-"JMP" + d = divd / divr + // amd64:-"JMP" + // 386:-"JMP" + e = divd % divr + } + return d, e +} + // Check that len() and cap() calls divided by powers of two are // optimized into shifts and ands From 93eded02976e1bdfaddf3403fa415393f5b90378 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= Date: Thu, 11 Oct 2018 14:35:29 +0200 Subject: [PATCH 217/240] internal/syscall/unix, net: improve interface_aix.go This commit improves the interface_aix.go file, based on feedbacks about CL 138724. To retrieve MTU, ioctl is needed. It's implemented inside internal/syscall/unix. Change-Id: Ic583d26b93935a32a5f1eb5a2170b86e80a4a85e Reviewed-on: https://go-review.googlesource.com/c/142157 Run-TryBot: Brad Fitzpatrick TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/go/build/deps_test.go | 2 +- src/internal/syscall/unix/asm_aix_ppc64.s | 12 +++++++++ src/internal/syscall/unix/ioctl_aix.go | 25 +++++++++++++++++++ src/net/interface_aix.go | 30 ++++++++++++++++++----- 4 files changed, 62 insertions(+), 7 deletions(-) create mode 100644 src/internal/syscall/unix/asm_aix_ppc64.s create mode 100644 src/internal/syscall/unix/ioctl_aix.go diff --git a/src/go/build/deps_test.go b/src/go/build/deps_test.go index 7b3f25ffff..27edf78515 100644 --- a/src/go/build/deps_test.go +++ b/src/go/build/deps_test.go @@ -317,7 +317,7 @@ var pkgDeps = map[string][]string{ "net": { "L0", "CGO", "context", "math/rand", "os", "reflect", "sort", "syscall", "time", - "internal/nettrace", "internal/poll", + "internal/nettrace", "internal/poll", "internal/syscall/unix", "internal/syscall/windows", "internal/singleflight", "internal/race", "golang_org/x/net/dns/dnsmessage", "golang_org/x/net/lif", "golang_org/x/net/route", }, diff --git a/src/internal/syscall/unix/asm_aix_ppc64.s b/src/internal/syscall/unix/asm_aix_ppc64.s new file mode 100644 index 0000000000..9e82e3eb88 --- /dev/null +++ b/src/internal/syscall/unix/asm_aix_ppc64.s @@ -0,0 +1,12 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +#include "textflag.h" + +// +// System calls for aix/ppc64 are implemented in syscall/syscall_aix.go +// + +TEXT ·syscall6(SB),NOSPLIT,$0 + JMP syscall·syscall6(SB) diff --git a/src/internal/syscall/unix/ioctl_aix.go b/src/internal/syscall/unix/ioctl_aix.go new file mode 100644 index 0000000000..19d56c36a1 --- /dev/null +++ b/src/internal/syscall/unix/ioctl_aix.go @@ -0,0 +1,25 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package unix + +import ( + "syscall" + "unsafe" +) + +//go:cgo_import_dynamic libc_ioctl ioctl "libc.a/shr_64.o" +//go:linkname libc_ioctl libc_ioctl +var libc_ioctl uintptr + +// Implemented in syscall/syscall_aix.go. +func syscall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno) + +func Ioctl(fd int, cmd int, args uintptr) (err error) { + _, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_ioctl)), 3, uintptr(fd), uintptr(cmd), uintptr(args), 0, 0, 0) + if e1 != 0 { + err = e1 + } + return +} diff --git a/src/net/interface_aix.go b/src/net/interface_aix.go index 8b70206206..9a8b5bbdb1 100644 --- a/src/net/interface_aix.go +++ b/src/net/interface_aix.go @@ -5,12 +5,12 @@ package net import ( - //"os" + "internal/syscall/unix" "syscall" "unsafe" ) -type RawSockaddrDatalink struct { +type rawSockaddrDatalink struct { Len uint8 Family uint8 Index uint16 @@ -21,6 +21,11 @@ type RawSockaddrDatalink struct { Data [120]byte } +type ifreq struct { + Name [16]uint8 + Ifru [16]byte +} + const _KINFO_RT_IFLIST = (0x1 << 8) | 3 | (1 << 30) const _RTAX_NETMASK = 2 @@ -30,12 +35,12 @@ const _RTAX_MAX = 8 func getIfList() ([]byte, error) { needed, err := syscall.Getkerninfo(_KINFO_RT_IFLIST, 0, 0, 0) if err != nil { - return nil, nil // XXX + return nil, err } tab := make([]byte, needed) _, err = syscall.Getkerninfo(_KINFO_RT_IFLIST, uintptr(unsafe.Pointer(&tab[0])), uintptr(unsafe.Pointer(&needed)), 0) if err != nil { - return nil, nil // XXX + return nil, err } return tab[:needed], nil } @@ -57,12 +62,25 @@ func interfaceTable(ifindex int) ([]Interface, error) { } if ifm.Type == syscall.RTM_IFINFO { if ifindex == 0 || ifindex == int(ifm.Index) { - sdl := (*RawSockaddrDatalink)(unsafe.Pointer(&tab[syscall.SizeofIfMsghdr])) + sdl := (*rawSockaddrDatalink)(unsafe.Pointer(&tab[syscall.SizeofIfMsghdr])) ifi := &Interface{Index: int(ifm.Index), Flags: linkFlags(ifm.Flags)} ifi.Name = string(sdl.Data[:sdl.Nlen]) ifi.HardwareAddr = sdl.Data[sdl.Nlen : sdl.Nlen+sdl.Alen] - /* XXX MTU? */ + + // Retrieve MTU + ifr := &ifreq{} + copy(ifr.Name[:], ifi.Name) + sock, err := syscall.Socket(syscall.AF_INET, syscall.SOCK_DGRAM, 0) + if err != nil { + return nil, err + } + err = unix.Ioctl(sock, syscall.SIOCGIFMTU, uintptr(unsafe.Pointer(ifr))) + if err != nil { + return nil, err + } + ifi.MTU = int(ifr.Ifru[0])<<24 | int(ifr.Ifru[1])<<16 | int(ifr.Ifru[2])<<8 | int(ifr.Ifru[3]) + ift = append(ift, *ifi) if ifindex == int(ifm.Index) { break From e85b8db604bd6dd84502708434a19596b54468b5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Mon, 22 Oct 2018 20:45:04 +0200 Subject: [PATCH 218/240] runtime: use multiplication with overflow check for makemap MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This improves performance for maps with a bucket size (key+value*8 bytes) larger than 32 bytes and removes loading a value from the maxElems array for smaller bucket sizes. name old time/op new time/op delta MakeMap/[Byte]Byte 93.5ns ± 1% 91.8ns ± 1% -1.83% (p=0.000 n=10+10) MakeMap/[Int]Int 134ns ± 1% 127ns ± 2% -5.61% (p=0.000 n=9+10) Updates #21588 Change-Id: I53f77186769c4bd0f2b90f3c6c17df643b060e39 Reviewed-on: https://go-review.googlesource.com/c/143797 Run-TryBot: Martin Möhrmann TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/runtime/map.go | 7 +++++-- src/runtime/map_benchmark_test.go | 17 +++++++++++++++++ 2 files changed, 22 insertions(+), 2 deletions(-) diff --git a/src/runtime/map.go b/src/runtime/map.go index c3fcfbfdbe..3e368f929f 100644 --- a/src/runtime/map.go +++ b/src/runtime/map.go @@ -55,6 +55,7 @@ package runtime import ( "runtime/internal/atomic" + "runtime/internal/math" "runtime/internal/sys" "unsafe" ) @@ -296,7 +297,8 @@ func makemap_small() *hmap { // If h != nil, the map can be created directly in h. // If h.buckets != nil, bucket pointed to can be used as the first bucket. func makemap(t *maptype, hint int, h *hmap) *hmap { - if hint < 0 || hint > int(maxSliceCap(t.bucket.size)) { + mem, overflow := math.MulUintptr(uintptr(hint), t.bucket.size) + if overflow || mem > maxAlloc { hint = 0 } @@ -306,7 +308,8 @@ func makemap(t *maptype, hint int, h *hmap) *hmap { } h.hash0 = fastrand() - // find size parameter which will hold the requested # of elements + // Find the size parameter B which will hold the requested # of elements. + // For hint < 0 overLoadFactor returns false since hint < bucketCnt. B := uint8(0) for overLoadFactor(hint, B) { B++ diff --git a/src/runtime/map_benchmark_test.go b/src/runtime/map_benchmark_test.go index 1d9d09c698..5681d5eeb8 100644 --- a/src/runtime/map_benchmark_test.go +++ b/src/runtime/map_benchmark_test.go @@ -228,6 +228,23 @@ func benchmarkRepeatedLookup(b *testing.B, lookupKeySize int) { func BenchmarkRepeatedLookupStrMapKey32(b *testing.B) { benchmarkRepeatedLookup(b, 32) } func BenchmarkRepeatedLookupStrMapKey1M(b *testing.B) { benchmarkRepeatedLookup(b, 1<<20) } +func BenchmarkMakeMap(b *testing.B) { + b.Run("[Byte]Byte", func(b *testing.B) { + var m map[byte]byte + for i := 0; i < b.N; i++ { + m = make(map[byte]byte, 10) + } + hugeSink = m + }) + b.Run("[Int]Int", func(b *testing.B) { + var m map[int]int + for i := 0; i < b.N; i++ { + m = make(map[int]int, 10) + } + hugeSink = m + }) +} + func BenchmarkNewEmptyMap(b *testing.B) { b.ReportAllocs() for i := 0; i < b.N; i++ { From 3b091bf6cceca868e2063a2c8b3cec90411ea18e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Mon, 22 Oct 2018 20:22:55 +0200 Subject: [PATCH 219/240] runtime: use multiplication with overflow check for growslice MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This improves performance for slices with an element size larger than 32 bytes and removes loading a value from the maxElems array for smaller element sizes. name old time/op new time/op delta GrowSlice/Byte 41.4ns ± 2% 41.5ns ± 1% ~ (p=0.366 n=10+9) GrowSlice/Int16 51.1ns ± 2% 51.0ns ± 2% ~ (p=0.985 n=10+10) GrowSlice/Int 64.0ns ± 1% 64.2ns ± 1% ~ (p=0.180 n=10+10) GrowSlice/Ptr 90.8ns ± 1% 90.7ns ± 1% ~ (p=0.858 n=9+10) GrowSlice/Struct/24 108ns ± 0% 108ns ± 2% ~ (p=0.488 n=8+9) GrowSlice/Struct/32 118ns ± 2% 117ns ± 2% ~ (p=0.327 n=10+10) GrowSlice/Struct/40 159ns ± 1% 148ns ± 1% -6.87% (p=0.000 n=10+9) Updates #21588 Change-Id: I443b82972d379b1befa791f9ee468b3adc6bb760 Reviewed-on: https://go-review.googlesource.com/c/143798 Run-TryBot: Martin Möhrmann TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/runtime/slice.go | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) diff --git a/src/runtime/slice.go b/src/runtime/slice.go index 4206f4384a..2c5c52a6e6 100644 --- a/src/runtime/slice.go +++ b/src/runtime/slice.go @@ -5,6 +5,7 @@ package runtime import ( + "runtime/internal/math" "runtime/internal/sys" "unsafe" ) @@ -104,10 +105,11 @@ func growslice(et *_type, old slice, cap int) slice { msanread(old.array, uintptr(old.len*int(et.size))) } + if cap < old.cap { + panic(errorString("growslice: cap out of range")) + } + if et.size == 0 { - if cap < old.cap { - panic(errorString("growslice: cap out of range")) - } // append should not create a slice with nil pointer but non-zero len. // We assume that append doesn't need to preserve old.array in this case. return slice{unsafe.Pointer(&zerobase), old.len, cap} @@ -169,15 +171,14 @@ func growslice(et *_type, old slice, cap int) slice { default: lenmem = uintptr(old.len) * et.size newlenmem = uintptr(cap) * et.size - capmem = roundupsize(uintptr(newcap) * et.size) - overflow = uintptr(newcap) > maxSliceCap(et.size) + capmem, overflow = math.MulUintptr(et.size, uintptr(newcap)) + capmem = roundupsize(capmem) newcap = int(capmem / et.size) } - // The check of overflow (uintptr(newcap) > maxSliceCap(et.size)) - // in addition to capmem > _MaxMem is needed to prevent an overflow - // which can be used to trigger a segfault on 32bit architectures - // with this example program: + // The check of overflow in addition to capmem > maxAlloc is needed + // to prevent an overflow which can be used to trigger a segfault + // on 32bit architectures with this example program: // // type T [1<<27 + 1]int64 // @@ -188,7 +189,7 @@ func growslice(et *_type, old slice, cap int) slice { // s = append(s, d, d, d, d) // print(len(s), "\n") // } - if cap < old.cap || overflow || capmem > maxAlloc { + if overflow || capmem > maxAlloc { panic(errorString("growslice: cap out of range")) } From 05166bf54d053fcc833cf862b7cfb1fbf05b42ba Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Tue, 16 Oct 2018 00:27:42 +0200 Subject: [PATCH 220/240] runtime: use multiplication with overflow check for makeslice MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This improves performance for slices with an element size larger than 32 bytes and removes loading a value from the maxElems array for smaller element sizes. name old time/op new time/op delta MakeSlice/Byte 18.0ns ± 4% 18.0ns ± 2% ~ (p=0.575 n=20+17) MakeSlice/Int16 21.8ns ± 2% 21.6ns ± 1% -0.63% (p=0.035 n=20+19) MakeSlice/Int 42.0ns ± 2% 41.6ns ± 1% ~ (p=0.121 n=20+18) MakeSlice/Ptr 62.6ns ± 2% 62.4ns ± 2% ~ (p=0.491 n=20+18) MakeSlice/Struct/24 57.4ns ± 3% 56.0ns ± 2% -2.40% (p=0.000 n=19+19) MakeSlice/Struct/32 62.1ns ± 2% 60.6ns ± 3% -2.43% (p=0.000 n=20+20) MakeSlice/Struct/40 77.3ns ± 3% 68.9ns ± 3% -10.91% (p=0.000 n=20+20) Updates #21588 Change-Id: Ie12807bf8f77c0e15453413f47e3d7de771b798f Reviewed-on: https://go-review.googlesource.com/c/142377 Run-TryBot: Martin Möhrmann TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/runtime/slice.go | 24 +++++++-------- src/runtime/slice_test.go | 64 ++++++++++++++++++++++++++++++++++----- 2 files changed, 68 insertions(+), 20 deletions(-) diff --git a/src/runtime/slice.go b/src/runtime/slice.go index 2c5c52a6e6..095ddc5bbd 100644 --- a/src/runtime/slice.go +++ b/src/runtime/slice.go @@ -54,21 +54,21 @@ func panicmakeslicecap() { } func makeslice(et *_type, len, cap int) slice { - // NOTE: The len > maxElements check here is not strictly necessary, - // but it produces a 'len out of range' error instead of a 'cap out of range' error - // when someone does make([]T, bignumber). 'cap out of range' is true too, - // but since the cap is only being supplied implicitly, saying len is clearer. - // See issue 4085. - maxElements := maxSliceCap(et.size) - if len < 0 || uintptr(len) > maxElements { - panicmakeslicelen() - } - - if cap < len || uintptr(cap) > maxElements { + mem, overflow := math.MulUintptr(et.size, uintptr(cap)) + if overflow || mem > maxAlloc || len < 0 || len > cap { + // NOTE: Produce a 'len out of range' error instead of a + // 'cap out of range' error when someone does make([]T, bignumber). + // 'cap out of range' is true too, but since the cap is only being + // supplied implicitly, saying len is clearer. + // See golang.org/issue/4085. + mem, overflow := math.MulUintptr(et.size, uintptr(len)) + if overflow || mem > maxAlloc || len < 0 { + panicmakeslicelen() + } panicmakeslicecap() } + p := mallocgc(mem, et, true) - p := mallocgc(et.size*uintptr(cap), et, true) return slice{p, len, cap} } diff --git a/src/runtime/slice_test.go b/src/runtime/slice_test.go index c2dfb7afd1..0463fc70a7 100644 --- a/src/runtime/slice_test.go +++ b/src/runtime/slice_test.go @@ -10,20 +10,68 @@ import ( const N = 20 -func BenchmarkMakeSlice(b *testing.B) { - var x []byte - for i := 0; i < b.N; i++ { - x = make([]byte, 32) - _ = x - } -} - type ( struct24 struct{ a, b, c int64 } struct32 struct{ a, b, c, d int64 } struct40 struct{ a, b, c, d, e int64 } ) +func BenchmarkMakeSlice(b *testing.B) { + const length = 2 + b.Run("Byte", func(b *testing.B) { + var x []byte + for i := 0; i < b.N; i++ { + x = make([]byte, length, 2*length) + _ = x + } + }) + b.Run("Int16", func(b *testing.B) { + var x []int16 + for i := 0; i < b.N; i++ { + x = make([]int16, length, 2*length) + _ = x + } + }) + b.Run("Int", func(b *testing.B) { + var x []int + for i := 0; i < b.N; i++ { + x = make([]int, length, 2*length) + _ = x + } + }) + b.Run("Ptr", func(b *testing.B) { + var x []*byte + for i := 0; i < b.N; i++ { + x = make([]*byte, length, 2*length) + _ = x + } + }) + b.Run("Struct", func(b *testing.B) { + b.Run("24", func(b *testing.B) { + var x []struct24 + for i := 0; i < b.N; i++ { + x = make([]struct24, length, 2*length) + _ = x + } + }) + b.Run("32", func(b *testing.B) { + var x []struct32 + for i := 0; i < b.N; i++ { + x = make([]struct32, length, 2*length) + _ = x + } + }) + b.Run("40", func(b *testing.B) { + var x []struct40 + for i := 0; i < b.N; i++ { + x = make([]struct40, length, 2*length) + _ = x + } + }) + + }) +} + func BenchmarkGrowSlice(b *testing.B) { b.Run("Byte", func(b *testing.B) { x := make([]byte, 9) From 5ddb20912043ff7ad722a27cc93a7e68d1c5ec78 Mon Sep 17 00:00:00 2001 From: Iskander Sharipov Date: Wed, 25 Jul 2018 19:06:01 +0300 Subject: [PATCH 221/240] cmd/compile/internal/gc: remove dead code from stringtoarraylit The code path for []byte is unused. Rename function to stringtoruneslit to reflect change in the behavior. Note that removed code had a bug in it, it used [0] index instead of [i] inside a loop body. Change-Id: I58ece5d9d3835887b014446f8a7d3e7fc2fdcaa3 Reviewed-on: https://go-review.googlesource.com/c/125796 Run-TryBot: Iskander Sharipov TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/cmd/compile/internal/gc/typecheck.go | 28 +++++++++--------------- 1 file changed, 10 insertions(+), 18 deletions(-) diff --git a/src/cmd/compile/internal/gc/typecheck.go b/src/cmd/compile/internal/gc/typecheck.go index 992e59a010..0bbd89f05e 100644 --- a/src/cmd/compile/internal/gc/typecheck.go +++ b/src/cmd/compile/internal/gc/typecheck.go @@ -1719,14 +1719,14 @@ func typecheck1(n *Node, top int) *Node { } } - // do not use stringtoarraylit. + // do not convert to []byte literal. See CL 125796. // generated code and compiler memory footprint is better without it. case OSTRARRAYBYTE: break case OSTRARRAYRUNE: if n.Left.Op == OLITERAL { - n = stringtoarraylit(n) + n = stringtoruneslit(n) } } @@ -3509,27 +3509,19 @@ func typecheckfunc(n *Node) { } } -// The result of stringtoarraylit MUST be assigned back to n, e.g. -// n.Left = stringtoarraylit(n.Left) -func stringtoarraylit(n *Node) *Node { +// The result of stringtoruneslit MUST be assigned back to n, e.g. +// n.Left = stringtoruneslit(n.Left) +func stringtoruneslit(n *Node) *Node { if n.Left.Op != OLITERAL || n.Left.Val().Ctype() != CTSTR { Fatalf("stringtoarraylit %v", n) } - s := n.Left.Val().U.(string) var l []*Node - if n.Type.Elem().Etype == TUINT8 { - // []byte - for i := 0; i < len(s); i++ { - l = append(l, nod(OKEY, nodintconst(int64(i)), nodintconst(int64(s[0])))) - } - } else { - // []rune - i := 0 - for _, r := range s { - l = append(l, nod(OKEY, nodintconst(int64(i)), nodintconst(int64(r)))) - i++ - } + s := n.Left.Val().U.(string) + i := 0 + for _, r := range s { + l = append(l, nod(OKEY, nodintconst(int64(i)), nodintconst(int64(r)))) + i++ } nn := nod(OCOMPLIT, nil, typenod(n.Type)) From daaf361f74c3665bcb364356c5a9dd9f536c78c3 Mon Sep 17 00:00:00 2001 From: Peter Weinberger Date: Wed, 26 Sep 2018 10:10:48 -0400 Subject: [PATCH 222/240] internal/traceparser: provide parser that uses less space and parses segments of runtime trace files Traceparser generally takes 20-30% less space than internal/trace. The only user of these pakcages is cmd/trace, and the new package lets it handle some trace files that were too large. The new parser will also convert segments of the raw trace file (e.g. the last 10 seconds) to Events. Trace files from go 1.8 and before are not supported. Change-Id: If83fa183246db8f75182ccd3ba8df07673c0ebd0 Reviewed-on: https://go-review.googlesource.com/c/137635 Run-TryBot: Peter Weinberger TryBot-Result: Gobot Gobot Reviewed-by: Hyang-Ah Hana Kim --- misc/nacl/README | 4 +- misc/nacl/testzip.proto | 3 + src/go/build/deps_test.go | 2 + src/internal/traceparser/consistent.go | 313 ++++++++++ src/internal/traceparser/events.go | 312 ++++++++++ src/internal/traceparser/file.go | 247 ++++++++ src/internal/traceparser/filebuf/filebuf.go | 165 +++++ .../traceparser/filebuf/filebuf_test.go | 204 ++++++ .../traceparser/filebuf/fromreader.go | 71 +++ src/internal/traceparser/fuzz.go | 49 ++ src/internal/traceparser/goroutines.go | 341 ++++++++++ src/internal/traceparser/parser_test.go | 107 ++++ src/internal/traceparser/raw.go | 106 ++++ src/internal/traceparser/robust.go | 585 ++++++++++++++++++ ...ecf6e5dfb78e954e7892120b56bfca50af65-6.bad | Bin 0 -> 79 bytes ...d1787a6339366dac733a2f957a05d7aa3ac7-3.bad | Bin 0 -> 50 bytes ...24ef6753d71953e20d10638705bdccc3ba-2.weird | Bin 0 -> 62 bytes ...41b33e1bb93669f79cf3584755cc3ef7e8-2.weird | Bin 0 -> 70 bytes ...f452e473ded814ea880c602488637fc27e549.good | Bin 0 -> 1982 bytes ...d2ae08f558c494b2ef79e80b574c9f096c-8.weird | Bin 0 -> 60 bytes ...f81f6aae617eeec8dd920997ea27b3dda12b.weird | Bin 0 -> 2199 bytes ...b6e35ad7566869c887aa823fcbf69c0b80-1.weird | Bin 0 -> 27 bytes ...688ddff425bbbc220fbb7bd4fa11616a8b64-1.bad | Bin 0 -> 23 bytes ...bfc9d27851fb054ce03002e7e25f307e2f-5.weird | Bin 0 -> 65 bytes ...a69b265c3092972a2a81e77fbcaa87061735-4.bad | Bin 0 -> 41 bytes ...e808a6a3471352a4197d44fedbe3f5fb6f77-1.bad | Bin 0 -> 36 bytes ...c6ca9c22daec04c5f2530b16ea60bb0ba2-7.weird | Bin 0 -> 59 bytes ...88557e64b0714b8849aacf713d17ff928e-2.weird | Bin 0 -> 1683 bytes ...5aaf1cb69fb5fae50ba8546a7cdefade57-2.weird | Bin 0 -> 36 bytes ...f078c7dc722867d781b1fd7f37ca965372-7.weird | Bin 0 -> 62 bytes ...8a3813df03f2aed0d47f6d9bc844b8cb57-4.weird | Bin 0 -> 40 bytes ...26700dda2c2ac3b8743e9f319cb313042a-1.weird | Bin 0 -> 32 bytes src/internal/traceparser/tr.go | 498 +++++++++++++++ src/internal/traceparser/writer.go | 52 ++ 34 files changed, 3057 insertions(+), 2 deletions(-) create mode 100644 src/internal/traceparser/consistent.go create mode 100644 src/internal/traceparser/events.go create mode 100644 src/internal/traceparser/file.go create mode 100755 src/internal/traceparser/filebuf/filebuf.go create mode 100755 src/internal/traceparser/filebuf/filebuf_test.go create mode 100644 src/internal/traceparser/filebuf/fromreader.go create mode 100644 src/internal/traceparser/fuzz.go create mode 100644 src/internal/traceparser/goroutines.go create mode 100644 src/internal/traceparser/parser_test.go create mode 100644 src/internal/traceparser/raw.go create mode 100644 src/internal/traceparser/robust.go create mode 100644 src/internal/traceparser/testdata/06dfecf6e5dfb78e954e7892120b56bfca50af65-6.bad create mode 100644 src/internal/traceparser/testdata/0e6dd1787a6339366dac733a2f957a05d7aa3ac7-3.bad create mode 100644 src/internal/traceparser/testdata/16970d24ef6753d71953e20d10638705bdccc3ba-2.weird create mode 100644 src/internal/traceparser/testdata/26492441b33e1bb93669f79cf3584755cc3ef7e8-2.weird create mode 100644 src/internal/traceparser/testdata/2ccf452e473ded814ea880c602488637fc27e549.good create mode 100644 src/internal/traceparser/testdata/34f92cd2ae08f558c494b2ef79e80b574c9f096c-8.weird create mode 100644 src/internal/traceparser/testdata/4557f81f6aae617eeec8dd920997ea27b3dda12b.weird create mode 100644 src/internal/traceparser/testdata/495712b6e35ad7566869c887aa823fcbf69c0b80-1.weird create mode 100644 src/internal/traceparser/testdata/63cd688ddff425bbbc220fbb7bd4fa11616a8b64-1.bad create mode 100644 src/internal/traceparser/testdata/63df44bfc9d27851fb054ce03002e7e25f307e2f-5.weird create mode 100644 src/internal/traceparser/testdata/6aa1a69b265c3092972a2a81e77fbcaa87061735-4.bad create mode 100644 src/internal/traceparser/testdata/7b82e808a6a3471352a4197d44fedbe3f5fb6f77-1.bad create mode 100644 src/internal/traceparser/testdata/94347dc6ca9c22daec04c5f2530b16ea60bb0ba2-7.weird create mode 100644 src/internal/traceparser/testdata/9fa93c88557e64b0714b8849aacf713d17ff928e-2.weird create mode 100644 src/internal/traceparser/testdata/abf7185aaf1cb69fb5fae50ba8546a7cdefade57-2.weird create mode 100644 src/internal/traceparser/testdata/d28fcef078c7dc722867d781b1fd7f37ca965372-7.weird create mode 100644 src/internal/traceparser/testdata/d70f178a3813df03f2aed0d47f6d9bc844b8cb57-4.weird create mode 100644 src/internal/traceparser/testdata/e68c3126700dda2c2ac3b8743e9f319cb313042a-1.weird create mode 100644 src/internal/traceparser/tr.go create mode 100644 src/internal/traceparser/writer.go diff --git a/misc/nacl/README b/misc/nacl/README index 99b94dc90a..179e526d89 100644 --- a/misc/nacl/README +++ b/misc/nacl/README @@ -26,7 +26,7 @@ scheme. # Download NaCl Download nacl_sdk.zip file from - https://developers.google.com/native-client/dev/sdk/download + https://developer.chrome.com/native-client/sdk/download and unpack it. I chose /opt/nacl_sdk. # Update @@ -37,7 +37,7 @@ sdk. These are released every 6-8 weeks, in line with Chrome releases. % cd /opt/nacl_sdk % ./naclsdk update -At this time pepper_40 is the stable version. The NaCl port needs at least pepper_39 +At this time pepper_49 is the stable version. The NaCl port needs at least pepper_39 to work. If naclsdk downloads a later version, please adjust accordingly. The cmd/go helper scripts expect that the loaders sel_ldr_{x86_{32,64},arm} and diff --git a/misc/nacl/testzip.proto b/misc/nacl/testzip.proto index 5a6a5f43b2..7f524cac48 100644 --- a/misc/nacl/testzip.proto +++ b/misc/nacl/testzip.proto @@ -154,6 +154,9 @@ go src=.. trace testdata + + traceparser + testdata + + io + mime diff --git a/src/go/build/deps_test.go b/src/go/build/deps_test.go index 27edf78515..386ab9e408 100644 --- a/src/go/build/deps_test.go +++ b/src/go/build/deps_test.go @@ -272,6 +272,8 @@ var pkgDeps = map[string][]string{ "internal/goroot": {"L4", "OS"}, "internal/singleflight": {"sync"}, "internal/trace": {"L4", "OS"}, + "internal/traceparser": {"L4", "internal/traceparser/filebuf"}, + "internal/traceparser/filebuf": {"L4", "OS"}, "math/big": {"L4"}, "mime": {"L4", "OS", "syscall", "internal/syscall/windows/registry"}, "mime/quotedprintable": {"L4"}, diff --git a/src/internal/traceparser/consistent.go b/src/internal/traceparser/consistent.go new file mode 100644 index 0000000000..70fbd04b3f --- /dev/null +++ b/src/internal/traceparser/consistent.go @@ -0,0 +1,313 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package traceparser + +// postProcess is a final check of consistency, and if all is well, +// adds links to Events + +import ( + "fmt" +) + +type gStatus int + +const ( + gDead gStatus = iota + gRunnable + gRunning + gWaiting +) + +// This code is copied from internal/trace/parser.go. With greater understanding it could be +// simplified. Sets ev.P for GCStart, and set various Link fields +func (p *Parsed) postProcess(events []*Event) error { + type gdesc struct { + state gStatus + ev *Event + evStart *Event + evCreate *Event + evMarkAssist *Event + } + type pdesc struct { + running bool + g uint64 + evSTW *Event + evSweep *Event + } + + gs := make(map[uint64]gdesc) + ps := make(map[int]pdesc) + tasks := make(map[uint64]*Event) // task id to task creation events + activeRegions := make(map[uint64][]*Event) // goroutine id to stack of spans + gs[0] = gdesc{state: gRunning} + var evGC, evSTW *Event + + checkRunning := func(pd pdesc, g gdesc, ev *Event, allowG0 bool) error { + if g.state != gRunning { + return fmt.Errorf("saw %v, but g %d is not running", ev, ev.G) + } + if pd.g != ev.G { + return fmt.Errorf("saw %v, but it's P is running %d, not %d", ev, pd.g, ev.G) + } + if !allowG0 && ev.G == 0 { + return fmt.Errorf("saw %v with unexpected g==0", ev) + } + return nil + } + for i, ev := range events { + g := gs[ev.G] + px := ps[int(ev.P)] + switch ev.Type { + case EvProcStart: + if px.running { + return fmt.Errorf("%d: running before start %s", i, ev) + } + px.running = true + case EvProcStop: + if !px.running { + return fmt.Errorf("%d: p %d not running %s", i, ev.P, ev) + } + if px.g != 0 { + return fmt.Errorf("p %d is running a goroutine %s", ev.P, ev) + } + px.running = false + case EvGCStart: + if evGC != nil { + return fmt.Errorf("GC already running %s, was %s", ev, evGC) + } + evGC = ev + // Attribute this to the global GC state. + ev.P = GCP + case EvGCDone: + if evGC == nil { + return fmt.Errorf("%d:%s bogus GC end", i, ev) + } + evGC.Link = ev + evGC = nil + case EvGCSTWStart: + evp := &evSTW + if p.Version < 1010 { + // Before 1.10, EvGCSTWStart was per-P. + evp = &px.evSTW + } + if *evp != nil { + return fmt.Errorf("STW %s still running at %s", *evp, ev) + } + *evp = ev + case EvGCSTWDone: + evp := &evSTW + if p.Version < 1010 { + // Before 1.10, EvGCSTWDone was per-P. + evp = &px.evSTW + } + if *evp == nil { + return fmt.Errorf("%d: no STW running %s", i, ev) + } + (*evp).Link = ev + *evp = nil + case EvGCMarkAssistStart: + if g.evMarkAssist != nil { + return fmt.Errorf("%d: MarkAssist %s is still running at %s", + i, g.evMarkAssist, ev) + } + g.evMarkAssist = ev + case EvGCMarkAssistDone: + // Unlike most events, mark assists can be in progress when a + // goroutine starts tracing, so we can't report an error here. + if g.evMarkAssist != nil { + g.evMarkAssist.Link = ev + g.evMarkAssist = nil + } + case EvGCSweepStart: + if px.evSweep != nil { + return fmt.Errorf("sweep not done %d: %s", i, ev) + } + px.evSweep = ev + case EvGCSweepDone: + if px.evSweep == nil { + return fmt.Errorf("%d: no sweep happening %s", i, ev) + } + px.evSweep.Link = ev + px.evSweep = nil + case EvGoWaiting: + if g.state != gRunnable { + return fmt.Errorf("not runnable before %d:%s", i, ev) + } + g.state = gWaiting + g.ev = ev + case EvGoInSyscall: + if g.state != gRunnable { + return fmt.Errorf("not runnable before %d:%s", i, ev) + } + g.state = gWaiting + g.ev = ev + case EvGoCreate: + if err := checkRunning(px, g, ev, true); err != nil { + return err + } + if _, ok := gs[ev.Args[0]]; ok { + return fmt.Errorf("%d: already exists %s", i, ev) + } + gs[ev.Args[0]] = gdesc{state: gRunnable, ev: ev, evCreate: ev} + case EvGoStart, EvGoStartLabel: + if g.state != gRunnable { + return fmt.Errorf("not runnable before start %d:%s %+v", i, ev, g) + } + if px.g != 0 { + return fmt.Errorf("%d: %s has p running %d already %v", i, ev, px.g, px) + } + g.state = gRunning + g.evStart = ev + px.g = ev.G + if g.evCreate != nil { + if p.Version < 1007 { + // +1 because symbolizer expects return pc. + //PJW: aren't doing < 1007. ev.stk = []*Frame{{PC: g.evCreate.args[1] + 1}} + } else { + ev.StkID = uint32(g.evCreate.Args[1]) + } + g.evCreate = nil + } + + if g.ev != nil { + g.ev.Link = ev + g.ev = nil + } + case EvGoEnd, EvGoStop: + if err := checkRunning(px, g, ev, false); err != nil { + return fmt.Errorf("%d: %s", i, err) + } + g.evStart.Link = ev + g.evStart = nil + g.state = gDead + px.g = 0 + + if ev.Type == EvGoEnd { // flush all active Regions + spans := activeRegions[ev.G] + for _, s := range spans { + s.Link = ev + } + delete(activeRegions, ev.G) + } + case EvGoSched, EvGoPreempt: + if err := checkRunning(px, g, ev, false); err != nil { + return err + } + g.state = gRunnable + g.evStart.Link = ev + g.evStart = nil + px.g = 0 + g.ev = ev + case EvGoUnblock: + if g.state != gRunning { // PJW, error message + return fmt.Errorf("Event %d (%s) is not running at unblock %s", i, ev, g.state) + + } + if ev.P != TimerP && px.g != ev.G { + // PJW: do better here. + return fmt.Errorf("%d: %s p %d is not running g", i, ev, px.g) + } + g1 := gs[ev.Args[0]] + if g1.state != gWaiting { + return fmt.Errorf("g %v is not waiting before unpark i=%d g1=%v %s", + ev.Args[0], i, g1, ev) + } + if g1.ev != nil && g1.ev.Type == EvGoBlockNet && ev.P != TimerP { + ev.P = NetpollP + } + if g1.ev != nil { + g1.ev.Link = ev + } + g1.state = gRunnable + g1.ev = ev + gs[ev.Args[0]] = g1 + case EvGoSysCall: + if err := checkRunning(px, g, ev, false); err != nil { + return err + } + g.ev = ev + case EvGoSysBlock: + if err := checkRunning(px, g, ev, false); err != nil { + return err + } + g.state = gWaiting + g.evStart.Link = ev + g.evStart = nil + px.g = 0 + case EvGoSysExit: + if g.state != gWaiting { + return fmt.Errorf("not waiting when %s", ev) + } + if g.ev != nil && g.ev.Type == EvGoSysCall { + g.ev.Link = ev + } + g.state = gRunnable + g.ev = ev + case EvGoSleep, EvGoBlock, EvGoBlockSend, EvGoBlockRecv, + EvGoBlockSelect, EvGoBlockSync, EvGoBlockCond, EvGoBlockNet, EvGoBlockGC: + if err := checkRunning(px, g, ev, false); err != nil { + return err + } + g.state = gWaiting + g.ev = ev + g.evStart.Link = ev + g.evStart = nil + px.g = 0 + case EvUserTaskCreate: + taskid := ev.Args[0] + if prevEv, ok := tasks[taskid]; ok { + return fmt.Errorf("task id conflicts (id:%d), %q vs %q", taskid, ev, prevEv) + } + tasks[ev.Args[0]] = ev + case EvUserTaskEnd: + if prevEv, ok := tasks[ev.Args[0]]; ok { + prevEv.Link = ev + ev.Link = prevEv + } + case EvUserRegion: + mode := ev.Args[1] + spans := activeRegions[ev.G] + if mode == 0 { // span start + activeRegions[ev.G] = append(spans, ev) // push + } else if mode == 1 { // span end + n := len(spans) + if n > 0 { // matching span start event is in the trace. + s := spans[n-1] + if s.Args[0] != ev.Args[0] || s.SArgs[0] != ev.SArgs[0] { // task id, span name mismatch + return fmt.Errorf("misuse of span in goroutine %d: span end %q when the inner-most active span start event is %q", + ev.G, ev, s) + } + // Link span start event with span end event + s.Link = ev + ev.Link = s + + if n > 1 { + activeRegions[ev.G] = spans[:n-1] + } else { + delete(activeRegions, ev.G) + } + } + } else { + return fmt.Errorf("invalid user region, mode: %q", ev) + } + } + gs[ev.G] = g + ps[int(ev.P)] = px + } + return nil +} +func (g gStatus) String() string { + switch g { + case gDead: + return "gDead" + case gRunnable: + return "gRunnable" + case gRunning: + return "gRunning" + case gWaiting: + return "gWaiting" + } + return fmt.Sprintf("gStatus?%d", g) +} diff --git a/src/internal/traceparser/events.go b/src/internal/traceparser/events.go new file mode 100644 index 0000000000..00451f37b5 --- /dev/null +++ b/src/internal/traceparser/events.go @@ -0,0 +1,312 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package traceparser + +import ( + "fmt" + "sort" +) + +// convert raw events into Events + +func (p *Parsed) createEvents(f func(string)) error { + // multiple passes: + // create some Events + // sort them by time (and adjust their times to be nanonseconds) + // remove events not in the desired time interval + // make the events consistent (adding initializing events at the beginning) + // remove the futile events + // add links (and do final checking) + + // shared by firstEvents + p.byproc = make(map[int][]*Event) + p.lastGs = make(map[int]uint64) + + // p.batches are always sorted by time. otherwise a batch for one p that is totally + // later than another batch might be done first, confusing us about g's + for i, b := range p.batches { + if b.raws == nil { + continue + } + if err := p.firstEvents(b); err != nil { + return fmt.Errorf("%v", err) // PJW: this is not useful + } + // we done with b.raws now + p.batches[i].raws = nil + } + f("firstEvents finished") + sorted := []*Event{} + for _, v := range p.byproc { + sorted = append(sorted, v...) + } + // PJW: are we done with p.byproc now? Yes. This shrinks a little. + p.byproc = nil + // Why wasn't this done earlier? Or, why do it at all? + for _, ev := range sorted { + switch ev.Type { + case EvGoStartLocal: + ev.Type = EvGoStart + case EvGoUnblockLocal: + ev.Type = EvGoUnblock + case EvGoSysExitLocal: + ev.Type = EvGoSysExit + } + } + // change to nanoseconds + freq := 1e9 / float64(p.TicksPerSec) + for i, ev := range sorted { + // Move timers and syscalls to separate fake Ps. + // This could be done in the loop at line 38 + // or maybe after robust fixes things. + if p.timerGoids[ev.G] && ev.Type == EvGoUnblock { + ev.Args[2] = uint64(ev.P) // save for robust() to use + ev.P = TimerP + } + // sometimes the ts is not what it should be + if ev.Type == EvGoSysExit { + ev.P = SyscallP + if ev.Args[2] != 0 { + // PJW: test for this being safe. There might be no preceding + // EvSysBlock, EvGoInSyscall, or its time might be later than this + ev.Ts = int64(ev.Args[2]) + } + } + if ev.Type == EvGCStart { + ev.P = GCP + } + t := ev.Ts - p.minticks + if t < 0 { + return fmt.Errorf("event %d %s would be %d mints=%x", i, ev, t, p.minticks) + } + ev.Ts = int64(float64(ev.Ts-p.minticks) * freq) + } + // Stable for the case of equal Ts's. + sort.SliceStable(sorted, func(i, j int) bool { return sorted[i].Ts < sorted[j].Ts }) + f("sorted") + // and ignore the ones with times out of bounds + firstwant, lastwant := 0, len(sorted) + for i, ev := range sorted { + if ev.Ts < p.MinWant { + firstwant = i + 1 + } else if ev.Ts > p.MaxWant { // closed interval [minwant, maxwant] + lastwant = i + break // sorted by Ts + } + } + f("nanoseconds") + var err error + sorted, _, err = p.robust(sorted[firstwant:lastwant]) // PJW: copy info from aux + f("consistent") + if err != nil { + return err + } + events, cnt := p.removeFutile(sorted) // err is always nil here. + f(fmt.Sprintf("removed %d futiles", cnt)) + // and finally, do some checks and put in links + err = p.postProcess(events) + f("post processed") + if err != nil { + return err // PJW: is this enough? NO + } + p.Events = events + return nil +} + +// Special P identifiers. +const ( + FakeP = 1000000 + iota + TimerP // depicts timer unblocks + NetpollP // depicts network unblocks + SyscallP // depicts returns from syscalls + GCP // depicts GC state +) + +// convert the raw events for a batch into Events, and keep track of +// which G is running on the P that is common to the batch. +func (p *Parsed) firstEvents(b batch) error { + for _, raw := range b.raws { + desc := EventDescriptions[raw.typ] + narg := p.rawArgNum(&raw) + if p.Err != nil { + return p.Err + } + if raw.typ == EvBatch { + // first event, record information about P, G, and Ts + p.lastGs[p.lastP] = p.lastG // 0 the first time through + p.lastP = int(raw.Arg(0)) + p.lastG = p.lastGs[p.lastP] + p.lastTs = int64(raw.Arg(1)) + continue + } + e := &Event{Type: raw.typ, P: int32(p.lastP), G: p.lastG} + var argoffset int + if p.Version < 1007 { // can't happen. + e.Ts = p.lastTs + int64(raw.Arg(1)) + argoffset = 2 + } else { + e.Ts = p.lastTs + int64(raw.Arg(0)) + argoffset = 1 + } + p.lastTs = e.Ts + // collect the args for the raw event e + for i := argoffset; i < narg; i++ { + // evade one byte of corruption (from fuzzing typically) + if raw.args == nil { + return fmt.Errorf("raw.args is nil %s", evname(raw.typ)) + } + if i > 0 && i-1 >= len(*raw.args) { + return fmt.Errorf("%s wants arg %d of %d", evname(raw.typ), i, len(*raw.args)) + } + if i == narg-1 && desc.Stack { + e.StkID = uint32(raw.Arg(i)) + } else { + e.Args[i-argoffset] = raw.Arg(i) + } + } + switch raw.typ { + case EvGoSysCall, EvGCSweepDone, EvGCSweepStart: + if e.G == 0 { + // missing some earlier G's from this P + continue // so we don't know which G is doing it + } + case EvGoStart, EvGoStartLocal, EvGoStartLabel: + p.lastG = e.Args[0] + e.G = p.lastG + if raw.typ == EvGoStartLabel { + e.SArgs = []string{p.Strings[e.Args[2]]} + } + case EvGCSTWStart: + e.G = 0 + switch e.Args[0] { + case 0: + e.SArgs = []string{"mark termination"} + case 1: + e.SArgs = []string{"sweep termination"} + default: + return fmt.Errorf("unknown STW kind %d!=0,1 %s", e.Args[0], e) + } + case EvGCStart, EvGCDone, EvGCSTWDone: + e.G = 0 + case EvGoEnd, EvGoStop, EvGoSched, EvGoPreempt, + EvGoSleep, EvGoBlock, EvGoBlockSend, EvGoBlockRecv, + EvGoBlockSelect, EvGoBlockSync, EvGoBlockCond, EvGoBlockNet, + EvGoSysBlock, EvGoBlockGC: + p.lastG = 0 + if e.G == 0 { + // missing some earlier G's from this P + continue // so we don't know which G is doing it + } + case EvGoSysExit, EvGoWaiting, EvGoInSyscall: + e.G = e.Args[0] + case EvUserTaskCreate: + // e.Args 0: taskID, 1:parentID, 2:nameID + e.SArgs = []string{p.Strings[e.Args[2]]} + case EvUserRegion: + if e.G == 0 { + continue // don't know its G + } + // e.Args 0: taskID, 1: mode, 2:nameID + e.SArgs = []string{p.Strings[e.Args[2]]} + case EvUserLog: + // e.Args 0: taskID, 1:keyID, 2: stackID + e.SArgs = []string{p.Strings[e.Args[1]], raw.sarg} + } + p.byproc[p.lastP] = append(p.byproc[p.lastP], e) + } + return nil +} + +func (p *Parsed) removeFutile(events []*Event) ([]*Event, int) { + // Phase 1: determine futile wakeup sequences. + type G struct { + futile bool + wakeup []*Event // wakeup sequence (subject for removal) + } + gs := make(map[uint64]G) + futile := make(map[*Event]bool) + cnt := 0 + for _, ev := range events { + switch ev.Type { + case EvGoUnblock: + g := gs[ev.Args[0]] + g.wakeup = []*Event{ev} + gs[ev.Args[0]] = g + case EvGoStart, EvGoPreempt, EvFutileWakeup: + g := gs[ev.G] + g.wakeup = append(g.wakeup, ev) + if ev.Type == EvFutileWakeup { + g.futile = true + } + gs[ev.G] = g + case EvGoBlock, EvGoBlockSend, EvGoBlockRecv, EvGoBlockSelect, + EvGoBlockSync, EvGoBlockCond: + g := gs[ev.G] + if g.futile { + futile[ev] = true + for _, ev1 := range g.wakeup { + futile[ev1] = true + } + } + delete(gs, ev.G) + cnt++ + } + } + // Phase 2: remove futile wakeup sequences. + newEvents := events[:0] // overwrite the original slice + for _, ev := range events { + if !futile[ev] { + newEvents = append(newEvents, ev) + } + } + return newEvents, cnt // PJW: cnt doesn't count the futile[]s +} + +// Arg gets the n-th arg from a raw event +func (r *rawEvent) Arg(n int) uint64 { + if n == 0 { + return r.arg0 + } + return (*r.args)[n-1] +} + +// report the number of arguments. (historical differences) +func (p *Parsed) rawArgNum(ev *rawEvent) int { + desc := EventDescriptions[ev.typ] + switch ev.typ { + case EvStack, EvFrequency, EvTimerGoroutine: + p.Err = fmt.Errorf("%s unexpected in rawArgNum", evname(ev.typ)) + return 0 + } + narg := len(desc.Args) + if desc.Stack { + narg++ + } + if ev.typ == EvBatch { + if p.Version < 1007 { + narg++ // used to be an extra unused arg + } + return narg + } + narg++ // timestamp + if p.Version < 1007 { + narg++ // sequence + } + // various special historical cases + switch ev.typ { + case EvGCSweepDone: + if p.Version < 1009 { + narg -= 2 // 1.9 added 2 args + } + case EvGCStart, EvGoStart, EvGoUnblock: + if p.Version < 1007 { + narg-- // one more since 1.7 + } + case EvGCSTWStart: + if p.Version < 1010 { + narg-- // 1.10 added an argument + } + } + return narg +} diff --git a/src/internal/traceparser/file.go b/src/internal/traceparser/file.go new file mode 100644 index 0000000000..4671edafb2 --- /dev/null +++ b/src/internal/traceparser/file.go @@ -0,0 +1,247 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package traceparser + +import ( + "bytes" + "fmt" + "io" +) + +// scan the trace file finding the header, starts of batches, and the trailer. +// the trailer contains strings, stacks, and the clock frequency + +// There are two ways of thinking about the raw trace file. It starts with a 16 +// byte header "go 1.11 trace\0\0\0" +// From the point of +// view of the runtime, there is a collection of initializations for each goroutine. +// These consist of an EvGoCreate, possibly followed by one of EvGoWaiting or +// EvGoInSyscall if the go routine is waiting or in a syscall. +// Then there is an EvProcStart for the first running goroutine, so there's a running P, +// and then an EvGoStart for the first running goroutine. Then as the program runs, the +// runtime emits trace events. Finally when the tracing stops, the runtime emits a footer +// consisting of an EvFrequency (to convert ticks to nanoseconds) and some EvTimerGoroutines, +// followed by EvStacks for all the stack frames. +// +// In the file, the header and footer are as described, but all the events in between come +// in batches headed by EvBatch with the same P, and have to be rearranged into timestamp order. + +// New() scans once through the file to find the beginnings of all the batches (EvBatch) and +// processes the footer extracting the strings and stacks. +// Parse() finds the batches that overlap the desired time interval, and processes them into +// events, dropping those outside the desired time interval. But it has to derive the missing +// initializations from the events it sees, as it has no other access to the state of the runtime. +// This is done in robust.go. + +// In more detail, scanFile() is called by commonInit() which is called by either New() or ParseBuffer(). +// It extracts the strings, the stacks, and remembers the locations of the Batches (all saved in *Parsed). + +// Parse first computes the rawEvents for the batches that overlap the requested interval. +// It then calls createEvents() (events.go) which produces Events. + +func (p *Parsed) parseHeader() error { + p.r.Seek(0, 0) + var buf [16]byte + n, err := p.r.Read(buf[:]) + if n != 16 || err != nil { + return fmt.Errorf("failed to red header: read %d bytes, not 16 %v", n, err) + } + // by hand. there are only 6 or so legitimate values; we could search for a match + if buf[0] != 'g' || buf[1] != 'o' || buf[2] != ' ' || + buf[3] < '1' || buf[3] > '9' || + buf[4] != '.' || + buf[5] < '1' || buf[5] > '9' { + return fmt.Errorf("not a trace file") + } + ver := int(buf[5] - '0') + i := 0 + for ; buf[6+i] >= '0' && buf[6+i] <= '9' && i < 2; i++ { + ver = ver*10 + int(buf[6+i]-'0') + } + ver += int(buf[3]-'0') * 1000 + if !bytes.Equal(buf[6+i:], []byte(" trace\x00\x00\x00\x00")[:10-i]) { + return fmt.Errorf("not a trace file") + } + p.Version = ver + // PJW: reject 1005 and 1007? They need symbolization, which we don't do. + // Further, doing these would require 1.7 or earlier binaries. + switch ver { + case 1005, 1007: + break // no longer supported + case 1008, 1009: + return nil + case 1010, 1011: + return nil + } + return fmt.Errorf("%d unsupported version", ver) +} + +func (p *Parsed) scanFile() error { + r := p.r + // fill in the following values for sure + strings := make(map[uint64]string) + p.Strings = strings // ok to save maps immediately + timerGoIDs := make(map[uint64]bool) + p.timerGoids = timerGoIDs + stacks := make(map[uint32][]*Frame) + framer := make(map[Frame]*Frame) // uniqify *Frame + p.Stacks = stacks + footerLoc := 0 + + var buf [1]byte + off := 16 // skip the header + n, err := r.Seek(int64(off), 0) + if err != nil || n != int64(off) { + return fmt.Errorf("Seek to %d got %d, err=%v", off, n, err) + } + var batchts int64 // from preceding batch + var lastEv byte + for { + off0 := off + n, err := r.Read(buf[:1]) + if err == io.EOF { + break + } else if err != nil || n != 1 { + return fmt.Errorf("read failed at 0x%x, n=%d, %v", + off, n, err) + } + off += n + typ := buf[0] << 2 >> 2 + if typ == EvNone || typ >= EvCount || + EventDescriptions[typ].MinVersion > p.Version { + err = fmt.Errorf("unknown event type %v at offset 0x%x, pass 1", typ, off0) + return err + } + // extract and save the strings + if typ == EvString { + // String dictionary entry [ID, length, string]. + var id uint64 + id, off, err = readVal(r, off) + if err != nil { + return err + } + if id == 0 { + err = fmt.Errorf("string at offset %d has invalid id 0", off) + return err + } + if strings[id] != "" { + err = fmt.Errorf("string at offset %d has duplicate id %v", off, id) + return err + } + var ln uint64 + ln, off, err = readVal(r, off) + if err != nil { + return err + } + if ln == 0 { + err = fmt.Errorf("string at offset %d has invalid length 0", off) + return err + } + if ln > 1e6 { + err = fmt.Errorf("string at offset %d has too large length %v", off, ln) + return err + } + buf := make([]byte, ln) + var n int + n, err = io.ReadFull(r, buf) + if err != nil { + err = fmt.Errorf("failed to read trace at offset %d: read %v, want %v, error %v", off, n, ln, err) + return err + } + off += n + strings[id] = string(buf) + lastEv = EvString + continue + } + p.Count++ + if typ == EvFrequency { + // found footer, remember location, save value + footerLoc = off0 + } + var args []uint64 + off, args, err = p.argsAt(off0, typ) + if err != nil { + err = fmt.Errorf("argsAt error %v; off=%d off0=%d %s", + err, off, off0, evname(typ)) + return err + } + r.Seek(int64(off), 0) + if typ == EvUserLog { + _, off, err = readStr(r, off) + if err != nil { + return err + } + } + if len(args) == 0 { // can't happen in well-formed trace file + return fmt.Errorf("len(args)==0 off=0x%x typ=%s", off, evname(typ)) + } + switch typ { + case EvBatch: + if footerLoc == 0 { + // EvBatch in footer is just to have a header for stacks + locp := int64(args[0]) + p.batches = append(p.batches, + batch{Off: off0, P: locp, Cycles: int64(args[1])}) + // at this point we know when the previous batch ended!! + batchts = int64(args[1]) + if batchts > p.maxticks { + p.maxticks = batchts + } + } + case EvFrequency: + p.TicksPerSec = int64(args[0]) + case EvTimerGoroutine: + timerGoIDs[args[0]] = true + case EvStack: + if len(args) < 2 { + return fmt.Errorf("EvStack has too few args %d at 0x%x", + len(args), off0) + } + size := args[1] + if size > 1000 { + return fmt.Errorf("EvStack has %d frames at 0x%x", + size, off0) + } + want := 2 + 4*size + if uint64(len(args)) != want { + return fmt.Errorf("EvStack wants %d args, got %d, at 0x%x", + len(args), want, off0) + } + id := args[0] + if id != 0 && size > 0 { + stk := make([]*Frame, size) + for i := 0; i < int(size); i++ { + pc := args[2+i*4+0] + fn := args[2+i*4+1] + file := args[2+i*4+2] + line := args[2+i*4+3] + stk[i] = &Frame{PC: pc, Fn: strings[fn], File: strings[file], Line: int(line)} + if _, ok := framer[*stk[i]]; !ok { + framer[*stk[i]] = stk[i] + } + stk[i] = framer[*stk[i]] + } + stacks[uint32(id)] = stk + } + default: + if lastEv == EvBatch { + // p.MinTsVal is set by the first real event, not the first EvBatch + x := batchts + int64(args[0]) + if x < p.minticks { + p.minticks = x + } + } + batchts += int64(args[0]) + if batchts > p.maxticks { + p.maxticks = batchts + } + } + lastEv = typ + } + if footerLoc <= 0 { + return fmt.Errorf("malformed trace file, no EvFrequency") + } + return nil +} diff --git a/src/internal/traceparser/filebuf/filebuf.go b/src/internal/traceparser/filebuf/filebuf.go new file mode 100755 index 0000000000..32d5a92c5b --- /dev/null +++ b/src/internal/traceparser/filebuf/filebuf.go @@ -0,0 +1,165 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package filebuf implements io.SeekReader for os files. +// This is useful only for very large files with lots of +// seeking. (otherwise use ioutil.ReadFile or bufio) +package filebuf + +import ( + "fmt" + "io" + "os" +) + +// Buf is the implemented interface +type Buf interface { + io.ReadCloser + io.Seeker + Size() int64 + Stats() Stat +} + +// Buflen is the size of the internal buffer. +// The code is designed to never need to reread unnecessarily +const Buflen = 1 << 20 + +// fbuf is a buffered file with seeking. +// fixed is an internal buffer. buf is the slice fixed[:fixedLen]. bufloc is the file +// location of the beginning of fixed (and buf). The seek pointer is at bufloc+bufpos, +// so the file's contents there start with buf[bufpos:] +type fbuf struct { + Name string + fd *os.File + size int64 // file size + bufloc int64 // file loc of beginning of fixed + bufpos int32 // seekptr is at bufloc+bufpos. bufpos <= Buflen, fixedLen + fixed [Buflen]byte // backing store for buf + fixedlen int // how much of fixed is valid file contents + buf []byte // buf is fixed[0:fixedlen] + // statistics + seeks int // number of calls to fd.Seek + reads int // number of calls to fd.Read + bytes int64 // number of bytes read by fd.Read +} + +// Stat returns the number of underlying seeks and reads, and bytes read +type Stat struct { + Seeks int + Reads int + Bytes int64 +} + +// Stats returns the stats so far +func (fb *fbuf) Stats() Stat { + return Stat{fb.seeks, fb.reads, fb.bytes} +} + +// Size returns the file size +func (fb *fbuf) Size() int64 { + return fb.size +} + +// New returns an initialized *fbuf or an error +func New(fname string) (Buf, error) { + fd, err := os.Open(fname) + if err != nil { + return nil, err + } + fi, err := fd.Stat() + if err != nil || fi.Mode().IsDir() { + return nil, fmt.Errorf("not readable: %s", fname) + } + return &fbuf{Name: fname, fd: fd, size: fi.Size()}, nil +} + +// Read implements io.Reader. It may return a positive +// number of bytes read with io.EOF +func (fb *fbuf) Read(p []byte) (int, error) { + // If there are enough valid bytes remaining in buf, just use them + if len(fb.buf[fb.bufpos:]) >= len(p) { + copy(p, fb.buf[fb.bufpos:]) + fb.bufpos += int32(len(p)) + return len(p), nil + } + done := 0 // done counts how many bytes have been transferred + // If there are any valid bytes left in buf, use them first + if len(fb.buf[fb.bufpos:]) > 0 { + m := copy(p, fb.buf[fb.bufpos:]) + done = m + fb.bufpos += int32(done) // at end of the valid bytes in buf + } + // used up buffered data. logical seek pointer is at bufloc+bufpos. + // loop until p has been filled up or EOF + for done < len(p) { + loc, err := fb.fd.Seek(0, io.SeekCurrent) // make sure of the os's file location + if loc != fb.bufloc+int64(fb.bufpos) { + panic(fmt.Sprintf("%v loc=%d bufloc=%d bufpos=%d", err, loc, + fb.bufloc, fb.bufpos)) + } + fb.seeks++ // did a file system seek + if loc >= fb.size { + // at EOF + fb.bufpos = int32(len(fb.buf)) + fb.bufloc = loc - int64(fb.fixedlen) + return done, io.EOF + } + n, err := fb.fd.Read(fb.fixed[:]) + if n != 0 { + fb.fixedlen = n + } + fb.reads++ // did a file system read + m := copy(p[done:], fb.fixed[:n]) + done += m + if err != nil { + if err == io.EOF { + fb.bufpos = int32(len(fb.buf)) + fb.bufloc = loc - int64(fb.fixedlen) + return done, io.EOF + } + return 0, err + } + fb.bytes += int64(n) + fb.bufpos = int32(m) // used m byes of the buffer + fb.bufloc = loc + fb.buf = fb.fixed[:n] + } + return len(p), nil +} + +// Seek implements io.Seeker. (, io.EOF) is returned for seeks off the end. +func (fb *fbuf) Seek(offset int64, whence int) (int64, error) { + seekpos := offset + switch whence { + case io.SeekCurrent: + seekpos += fb.bufloc + int64(fb.bufpos) + case io.SeekEnd: + seekpos += fb.size + } + if seekpos < 0 || seekpos > fb.size { + return fb.bufloc + int64(fb.bufpos), io.EOF + } + // if seekpos is inside fixed, just adjust buf and bufpos + if seekpos >= fb.bufloc && seekpos <= int64(fb.fixedlen)+fb.bufloc { + fb.bufpos = int32(seekpos - fb.bufloc) + return seekpos, nil + } + // need to refresh the internal buffer. Seek does no reading, mark buf + // as empty, set bufpos and bufloc. + fb.buf, fb.bufpos, fb.bufloc = nil, 0, seekpos + n, err := fb.fd.Seek(seekpos, io.SeekStart) + fb.seeks++ + if n != seekpos || err != nil { + return -1, fmt.Errorf("seek failed (%d!= %d) %v", n, seekpos, err) + } + return seekpos, nil +} + +// Close closes the underlying file +func (fb *fbuf) Close() error { + if fb.fd != nil { + return fb.fd.Close() + } + return nil +} diff --git a/src/internal/traceparser/filebuf/filebuf_test.go b/src/internal/traceparser/filebuf/filebuf_test.go new file mode 100755 index 0000000000..7a735715ed --- /dev/null +++ b/src/internal/traceparser/filebuf/filebuf_test.go @@ -0,0 +1,204 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package filebuf + +import ( + "bytes" + "io" + "io/ioutil" + "log" + "os" + "testing" +) + +var ( + inited bool + small, large string // files + dir string // in this dir + contents []byte // contents of the large file +) + +func TestMain(m *testing.M) { + create() + n := m.Run() + + os.RemoveAll(dir) + os.Exit(n) +} + +func create() { + if inited { + return + } + log.SetFlags(log.Lshortfile) + d, erra := ioutil.TempDir("", "filebuf") + s, errb := ioutil.TempFile(dir, "small") + l, errc := ioutil.TempFile(dir, "large") + if erra != nil || errb != nil || errc != nil { + log.Fatal(erra, errb, errc) + } + dir, small, large = d, s.Name(), l.Name() + buf := make([]byte, 2*Buflen+3) + for i := 0; i < len(buf); i++ { + buf[i] = byte(i) + } + err := ioutil.WriteFile(small, buf[:7], 0666) + if err != nil { + log.Fatal(err) + } + err = ioutil.WriteFile(large, buf, 0666) + if err != nil { + log.Fatal(err) + } + contents = buf + inited = true +} + +func get(n int) io.Reader { + if n <= len(contents) { + return bytes.NewReader(contents[:n]) + } + return bytes.NewReader(contents) +} + +func TestSmall(t *testing.T) { + var f Buf + var err error + f, err = New(small) + small := func(t *testing.T) { + if err != nil { + t.Fatal(err) + } + buf := make([]byte, 23) + n, err := f.Read(buf) + if n != 7 || err != io.EOF { + t.Errorf("got %d, expected 7, %v", n, err) + } + m, err := f.Seek(0, io.SeekCurrent) + if m != 7 || err != nil { + t.Errorf("got %d, expected 7, %v", m, err) + } + m, err = f.Seek(1, io.SeekStart) + if m != 1 || err != nil { + t.Errorf("got %d expected 1, %v", m, err) + } + n, err = f.Read(buf) + if n != 6 || err != io.EOF { + t.Errorf("got %d, expected 6, %v", n, err) + } + for i := 0; i < 6; i++ { + if buf[i] != byte(i+1) { + t.Fatalf("byte %d is %d, not %d, %v", i, buf[i], i+1, buf) + } + } + } + t.Run("New", small) + f, err = FromReader(get(7)) + t.Run("Rdr", small) +} + +func TestLarge(t *testing.T) { + var f Buf + var err error + big := func(t *testing.T) { + if err != nil { + t.Fatal(err) + } + x := Buflen - 7 + n, err := f.Seek(int64(x), io.SeekStart) + if n != Buflen-7 || err != nil { + t.Fatalf("expected %d, got %d, %v", x, n, err) + } + buf := make([]byte, 23) + m, err := f.Read(buf) + if m != len(buf) || err != nil { + t.Fatalf("expected %d, got %d, %v", len(buf), m, err) + } + for i := 0; i < 23; i++ { + if buf[i] != byte(x+i) { + t.Fatalf("byte %d, got %d, wanted %d", i, buf[i], + byte(x+i)) + } + } + m, err = f.Read(buf) + if m != len(buf) || err != nil { + t.Fatalf("got %d, expected %d, %v", m, len(buf), err) + } + x += len(buf) + for i := 0; i < 23; i++ { + if buf[i] != byte(x+i) { + t.Fatalf("byte %d, got %d, wanted %d", i, buf[i], + byte(x+i)) + } + } + } + f, err = New(large) + t.Run("New", big) + f, err = FromReader(get(1 << 30)) + t.Run("Rdr", big) +} + +func TestMore(t *testing.T) { + f, err := New(large) + if err != nil { + t.Fatal(err) + } + var a, b [4]byte + f.Seek(16, 0) + f.Read(a[:]) + f.Seek(16, 0) + f.Read(b[:]) + if a != b { + t.Errorf("oops %v %v", a, b) + } +} + +func TestSeek(t *testing.T) { + f, err := New(small) + if err != nil { + log.Fatal(err) + } + n, err := f.Seek(f.Size(), 0) + if n != f.Size() || err != nil { + t.Errorf("seek got %d, expected %d, %v", n, f.Size(), err) + } + n, err = f.Seek(1, io.SeekCurrent) + if n != f.Size() || err != io.EOF { + t.Errorf("n=%d, expected 0. %v", n, err) + } + n, err = f.Seek(f.Size(), 0) + if n != f.Size() || err != nil { + t.Errorf("seek got %d, expected %d, %v", n, f.Size(), err) + } +} + +func TestReread(t *testing.T) { + f, err := New(small) + if err != nil { + t.Fatal(err) + } + var buf [1]byte + f.Seek(0, 0) + for i := 0; i < int(f.Size()); i++ { + n, err := f.Read(buf[:]) + if n != 1 || err != nil { + t.Fatalf("n=%d, err=%v", n, err) + } + } + stats := f.Stats() + if stats.Bytes != f.Size() || stats.Reads != 1 || stats.Seeks != 1 { + t.Errorf("%v %d %d", stats, f.(*fbuf).bufloc, f.(*fbuf).bufpos) + } + n, err := f.Read(buf[:]) + if n != 0 || err != io.EOF { + t.Fatalf("expected 0 and io.EOF, got %d %v", n, err) + } + f.Seek(0, 0) + xstats := f.Stats() + if xstats.Bytes != f.Size() || xstats.Reads != 1 || xstats.Seeks != 2 { + t.Errorf("%v %v %d %d", stats, xstats, f.(*fbuf).bufloc, f.(*fbuf).bufpos) + } + f.Close() +} diff --git a/src/internal/traceparser/filebuf/fromreader.go b/src/internal/traceparser/filebuf/fromreader.go new file mode 100644 index 0000000000..736cbf5e42 --- /dev/null +++ b/src/internal/traceparser/filebuf/fromreader.go @@ -0,0 +1,71 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package filebuf + +import ( + "bytes" + "io" +) + +// implement a Buf version from an io.Reader + +type rbuf struct { + buf []byte // contents + pos int64 + seeks, reads int // number of calls. 0 seems right. +} + +func (r *rbuf) Stats() Stat { + return Stat{r.seeks, r.reads, int64(len(r.buf))} +} + +func (r *rbuf) Size() int64 { + return int64(len(r.buf)) +} + +// FromReader creates a Buf by copying the contents of an io.Reader +func FromReader(rd io.Reader) (Buf, error) { + r := &rbuf{} + x := bytes.NewBuffer(r.buf) + _, err := io.Copy(x, rd) + r.buf = x.Bytes() + if err != nil { + return nil, err + } + return r, nil +} + +func (r *rbuf) Close() error { + return nil +} + +func (r *rbuf) Read(p []byte) (int, error) { + n := copy(p, r.buf[r.pos:]) + r.pos += int64(n) + if n == 0 || n < len(p) { + return n, io.EOF + } + return n, nil +} + +func (r *rbuf) Seek(offset int64, whence int) (int64, error) { + seekpos := offset + switch whence { + case io.SeekCurrent: + seekpos += int64(r.pos) + case io.SeekEnd: + seekpos += int64(len(r.buf)) + } + if seekpos < 0 || seekpos > int64(len(r.buf)) { + if seekpos < 0 { + r.pos = 0 + return 0, nil + } + r.pos = int64(len(r.buf)) + return r.pos, nil + } + r.pos = seekpos + return seekpos, nil +} diff --git a/src/internal/traceparser/fuzz.go b/src/internal/traceparser/fuzz.go new file mode 100644 index 0000000000..666ee945fb --- /dev/null +++ b/src/internal/traceparser/fuzz.go @@ -0,0 +1,49 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build gofuzz + +package traceparser + +import ( + "bytes" + "fmt" + "log" +) + +// at first we ran the old parser, and return 0 if it failed, on the theory that we don't have +// to do better. But that leads to very few crashes to look at. +// Maybe better just to make it so that the new parser doesn't misbehave, and if it doesn't get +// an error, that the old parser gets the same results. (up to whatever) +// perhaps even better would be to seed corpus with examples from which the 16-byte header +// has been stripped, and add it in Fuzz, so the fuzzer doesn't spend a lot of time making +// changes we reject in the header. (this may not be necessary) + +func Fuzz(data []byte) int { + if len(data) < 16 { + return 0 + } + switch x := string(data[:16]); x { + default: + return 0 + case "go 1.9 trace\000\000\000\000": + break + case "go 1.10 trace\000\000\000": + break + case "go 1.11 trace\000\000\000": + break + } + p, errp := ParseBuffer(bytes.NewBuffer(data)) + if errp != nil { + if p != nil { + panic(fmt.Sprintf("p not nil on error %s", errp)) + } + } + // TODO(pjw): if no errors, compare parses? + return 1 +} + +func init() { + log.SetFlags(log.Lshortfile) +} diff --git a/src/internal/traceparser/goroutines.go b/src/internal/traceparser/goroutines.go new file mode 100644 index 0000000000..5fe22f4f29 --- /dev/null +++ b/src/internal/traceparser/goroutines.go @@ -0,0 +1,341 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package traceparser + +import "sort" + +// GDesc contains statistics and execution details of a single goroutine. +type GDesc struct { + ID uint64 + Name string + PC uint64 + CreationTime int64 + StartTime int64 + EndTime int64 + + // List of regions in the goroutine, sorted based on the start time. + Regions []*UserRegionDesc + + // Statistics of execution time during the goroutine execution. + GExecutionStat + + *gDesc // private part. +} + +// UserRegionDesc represents a region and goroutine execution stats +// while the region was active. +type UserRegionDesc struct { + TaskID uint64 + Name string + + // Region start event. Normally EvUserRegion start event or nil, + // but can be EvGoCreate event if the region is a synthetic + // region representing task inheritance from the parent goroutine. + Start *Event + + // Region end event. Normally EvUserRegion end event or nil, + // but can be EvGoStop or EvGoEnd event if the goroutine + // terminated without explicitely ending the region. + End *Event + + GExecutionStat +} + +// GExecutionStat contains statistics about a goroutine's execution +// during a period of time. +type GExecutionStat struct { + ExecTime int64 + SchedWaitTime int64 + IOTime int64 + BlockTime int64 + SyscallTime int64 + GCTime int64 + SweepTime int64 + TotalTime int64 +} + +// sub returns the stats v-s. +func (s GExecutionStat) sub(v GExecutionStat) (r GExecutionStat) { + r = s + r.ExecTime -= v.ExecTime + r.SchedWaitTime -= v.SchedWaitTime + r.IOTime -= v.IOTime + r.BlockTime -= v.BlockTime + r.SyscallTime -= v.SyscallTime + r.GCTime -= v.GCTime + r.SweepTime -= v.SweepTime + r.TotalTime -= v.TotalTime + return r +} + +// snapshotStat returns the snapshot of the goroutine execution statistics. +// This is called as we process the ordered trace event stream. lastTs and +// activeGCStartTime are used to process pending statistics if this is called +// before any goroutine end event. +func (g *GDesc) snapshotStat(lastTs, activeGCStartTime int64) (ret GExecutionStat) { + ret = g.GExecutionStat + + if g.gDesc == nil { + return ret // finalized GDesc. No pending state. + } + + if activeGCStartTime != 0 { // terminating while GC is active + if g.CreationTime < activeGCStartTime { + ret.GCTime += lastTs - activeGCStartTime + } else { + // The goroutine's lifetime completely overlaps + // with a GC. + ret.GCTime += lastTs - g.CreationTime + } + } + + if g.TotalTime == 0 { + ret.TotalTime = lastTs - g.CreationTime + } + + if g.lastStartTime != 0 { + ret.ExecTime += lastTs - g.lastStartTime + } + if g.blockNetTime != 0 { + ret.IOTime += lastTs - g.blockNetTime + } + if g.blockSyncTime != 0 { + ret.BlockTime += lastTs - g.blockSyncTime + } + if g.blockSyscallTime != 0 { + ret.SyscallTime += lastTs - g.blockSyscallTime + } + if g.blockSchedTime != 0 { + ret.SchedWaitTime += lastTs - g.blockSchedTime + } + if g.blockSweepTime != 0 { + ret.SweepTime += lastTs - g.blockSweepTime + } + return ret +} + +// finalize is called when processing a goroutine end event or at +// the end of trace processing. This finalizes the execution stat +// and any active regions in the goroutine, in which case trigger is nil. +func (g *GDesc) finalize(lastTs, activeGCStartTime int64, trigger *Event) { + if trigger != nil { + g.EndTime = trigger.Ts + } + finalStat := g.snapshotStat(lastTs, activeGCStartTime) + + g.GExecutionStat = finalStat + for _, s := range g.activeRegions { + s.End = trigger + s.GExecutionStat = finalStat.sub(s.GExecutionStat) + g.Regions = append(g.Regions, s) + } + *(g.gDesc) = gDesc{} +} + +// gDesc is a private part of GDesc that is required only during analysis. +type gDesc struct { + lastStartTime int64 + blockNetTime int64 + blockSyncTime int64 + blockSyscallTime int64 + blockSweepTime int64 + blockGCTime int64 + blockSchedTime int64 + + activeRegions []*UserRegionDesc // stack of active regions +} + +// GoroutineStats generates statistics for all goroutines in the trace segment. +func (p *Parsed) GoroutineStats() map[uint64]*GDesc { + events := p.Events + gs := make(map[uint64]*GDesc) + var lastTs int64 + var gcStartTime int64 // gcStartTime == 0 indicates gc is inactive. + for _, ev := range events { + lastTs = ev.Ts + switch ev.Type { + case EvGoCreate: + g := &GDesc{ID: ev.Args[0], CreationTime: ev.Ts, gDesc: new(gDesc)} + g.blockSchedTime = ev.Ts + // When a goroutine is newly created, inherit the + // task of the active region. For ease handling of + // this case, we create a fake region description with + // the task id. + if creatorG := gs[ev.G]; creatorG != nil && len(creatorG.gDesc.activeRegions) > 0 { + regions := creatorG.gDesc.activeRegions + s := regions[len(regions)-1] + if s.TaskID != 0 { + g.gDesc.activeRegions = []*UserRegionDesc{ + {TaskID: s.TaskID, Start: ev}, + } + } + } + gs[g.ID] = g + case EvGoStart, EvGoStartLabel: + g := gs[ev.G] + if g.PC == 0 { + stk := p.Stacks[ev.StkID] + g.PC = stk[0].PC + g.Name = stk[0].Fn + } + g.lastStartTime = ev.Ts + if g.StartTime == 0 { + g.StartTime = ev.Ts + } + if g.blockSchedTime != 0 { + g.SchedWaitTime += ev.Ts - g.blockSchedTime + g.blockSchedTime = 0 + } + case EvGoEnd, EvGoStop: + g := gs[ev.G] + g.finalize(ev.Ts, gcStartTime, ev) + case EvGoBlockSend, EvGoBlockRecv, EvGoBlockSelect, + EvGoBlockSync, EvGoBlockCond: + g := gs[ev.G] + g.ExecTime += ev.Ts - g.lastStartTime + g.lastStartTime = 0 + g.blockSyncTime = ev.Ts + case EvGoSched, EvGoPreempt: + g := gs[ev.G] + g.ExecTime += ev.Ts - g.lastStartTime + g.lastStartTime = 0 + g.blockSchedTime = ev.Ts + case EvGoSleep, EvGoBlock: + g := gs[ev.G] + g.ExecTime += ev.Ts - g.lastStartTime + g.lastStartTime = 0 + case EvGoBlockNet: + g := gs[ev.G] + g.ExecTime += ev.Ts - g.lastStartTime + g.lastStartTime = 0 + g.blockNetTime = ev.Ts + case EvGoBlockGC: + g := gs[ev.G] + g.ExecTime += ev.Ts - g.lastStartTime + g.lastStartTime = 0 + g.blockGCTime = ev.Ts + case EvGoUnblock: + g := gs[ev.Args[0]] + if g.blockNetTime != 0 { + g.IOTime += ev.Ts - g.blockNetTime + g.blockNetTime = 0 + } + if g.blockSyncTime != 0 { + g.BlockTime += ev.Ts - g.blockSyncTime + g.blockSyncTime = 0 + } + g.blockSchedTime = ev.Ts + case EvGoSysBlock: + g := gs[ev.G] + g.ExecTime += ev.Ts - g.lastStartTime + g.lastStartTime = 0 + g.blockSyscallTime = ev.Ts + case EvGoSysExit: + g := gs[ev.G] + if g.blockSyscallTime != 0 { + g.SyscallTime += ev.Ts - g.blockSyscallTime + g.blockSyscallTime = 0 + } + g.blockSchedTime = ev.Ts + case EvGCSweepStart: + g := gs[ev.G] + if g != nil { + // Sweep can happen during GC on system goroutine. + g.blockSweepTime = ev.Ts + } + case EvGCSweepDone: + g := gs[ev.G] + if g != nil && g.blockSweepTime != 0 { + g.SweepTime += ev.Ts - g.blockSweepTime + g.blockSweepTime = 0 + } + case EvGCStart: + gcStartTime = ev.Ts + case EvGCDone: + for _, g := range gs { + if g.EndTime != 0 { + continue + } + if gcStartTime < g.CreationTime { + g.GCTime += ev.Ts - g.CreationTime + } else { + g.GCTime += ev.Ts - gcStartTime + } + } + gcStartTime = 0 // indicates gc is inactive. + case EvUserRegion: + g := gs[ev.G] + switch mode := ev.Args[1]; mode { + case 0: // region start + g.activeRegions = append(g.activeRegions, &UserRegionDesc{ + Name: ev.SArgs[0], + TaskID: ev.Args[0], + Start: ev, + GExecutionStat: g.snapshotStat(lastTs, gcStartTime), + }) + case 1: // region end + var sd *UserRegionDesc + if regionStk := g.activeRegions; len(regionStk) > 0 { + n := len(regionStk) + sd = regionStk[n-1] + regionStk = regionStk[:n-1] // pop + g.activeRegions = regionStk + } else { + sd = &UserRegionDesc{ + Name: ev.SArgs[0], + TaskID: ev.Args[0], + } + } + sd.GExecutionStat = g.snapshotStat(lastTs, gcStartTime).sub(sd.GExecutionStat) + sd.End = ev + g.Regions = append(g.Regions, sd) + } + } + } + + for _, g := range gs { + g.finalize(lastTs, gcStartTime, nil) + + // sort based on region start time + sort.Slice(g.Regions, func(i, j int) bool { + x := g.Regions[i].Start + y := g.Regions[j].Start + if x == nil { + return true + } + if y == nil { + return false + } + return x.Ts < y.Ts + }) + + g.gDesc = nil + } + + return gs +} + +// RelatedGoroutines finds a set of goroutines related to goroutine goid. +func (p *Parsed) RelatedGoroutines(goid uint64) map[uint64]bool { + events := p.Events + // BFS of depth 2 over "unblock" edges + // (what goroutines unblock goroutine goid?). + gmap := make(map[uint64]bool) + gmap[goid] = true + for i := 0; i < 2; i++ { + gmap1 := make(map[uint64]bool) + for g := range gmap { + gmap1[g] = true + } + for _, ev := range events { + if ev.Type == EvGoUnblock && gmap[ev.Args[0]] { + gmap1[ev.G] = true + } + } + gmap = gmap1 + } + gmap[0] = true // for GC events + return gmap +} diff --git a/src/internal/traceparser/parser_test.go b/src/internal/traceparser/parser_test.go new file mode 100644 index 0000000000..7df56fe1f9 --- /dev/null +++ b/src/internal/traceparser/parser_test.go @@ -0,0 +1,107 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package traceparser + +import ( + "io/ioutil" + "os" + "path/filepath" + "strings" + "testing" +) + +var ( + // testfiles from the old trace parser + otherDir = "../trace/testdata/" + want = map[string]bool{"http_1_9_good": true, "http_1_10_good": true, "http_1_11_good": true, + "stress_1_9_good": true, "stress_1_10_good": true, "stress_1_11_good": true, + "stress_start_stop_1_9_good": true, "stress_start_stop_1_10_good": true, + "stress_start_stop_1_11_good": true, "user_task_span_1_11_good": true, + + "http_1_5_good": false, "http_1_7_good": false, + "stress_1_5_good": false, "stress_1_5_unordered": false, "stress_1_7_good": false, + "stress_start_stop_1_5_good": false, "stress_start_stop_1_7_good": false, + } +) + +func TestRemoteFiles(t *testing.T) { + files, err := ioutil.ReadDir(otherDir) + if err != nil { + t.Fatal(err) + } + for _, f := range files { + fname := filepath.Join(otherDir, f.Name()) + p, err := New(fname) + if err == nil { + err = p.Parse(0, 1<<62, nil) + } + if err == nil != want[f.Name()] { + t.Errorf("%s: got %v expected %v, err=%v", + f.Name(), err == nil, want[f.Name()], err) + } + } +} + +func TestLocalFiles(t *testing.T) { + + files, err := ioutil.ReadDir("./testdata") + if err != nil { + t.Fatalf("failed to read ./testdata: %v", err) + } + for _, f := range files { + fname := filepath.Join("./testdata", f.Name()) + p, err := New(fname) + if err == nil { + err = p.Parse(0, 1<<62, nil) + } + switch { + case strings.Contains(f.Name(), "good"), + strings.Contains(f.Name(), "weird"): + if err != nil { + t.Errorf("unexpected failure %v %s", err, f.Name()) + } + case strings.Contains(f.Name(), "bad"): + if err == nil { + t.Errorf("bad file did not fail %s", f.Name()) + } + default: + t.Errorf("untyped file %v %s", err, f.Name()) + } + } +} + +func TestStats(t *testing.T) { + // Need just one good file to see that OSStats work properly, + files, err := ioutil.ReadDir("./testdata") + if err != nil { + t.Fatal(err) + } + for _, f := range files { + if !strings.HasPrefix(f.Name(), "good") { + continue + } + fname := filepath.Join("./testdata", f.Name()) + p, err := New(fname) + if err != nil { + t.Fatal(err) + } + stat := p.OSStats() + if stat.Bytes == 0 || stat.Seeks == 0 || stat.Reads == 0 { + t.Errorf("OSStats impossible %v", stat) + } + fd, err := os.Open(fname) + if err != nil { + t.Fatal(err) + } + pb, err := ParseBuffer(fd) + if err != nil { + t.Fatal(err) + } + stat = pb.OSStats() + if stat.Seeks != 0 || stat.Reads != 0 { + t.Errorf("unexpected positive results %v", stat) + } + } +} diff --git a/src/internal/traceparser/raw.go b/src/internal/traceparser/raw.go new file mode 100644 index 0000000000..e36a951475 --- /dev/null +++ b/src/internal/traceparser/raw.go @@ -0,0 +1,106 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package traceparser + +import ( + "encoding/binary" + "fmt" + "hash/fnv" + "io" + "log" +) + +// convert batches into their raw events. For small intervals (1 or 10 seconds) +// this takes about 40% of the total Parse time. + +func (p *Parsed) batchify(b *batch) error { + evs := make([]rawEvent, 0) + p.seenArgs = make(map[uint64]*[]uint64) + hasher := fnv.New64() + r := p.r + r.Seek(int64(b.Off), 0) + var buf [1]byte + seenBatch := false // to terminate the loop on the second EvBatch + + for off := b.Off; ; { + off0 := off // remember the beginning of the event + n, err := r.Read(buf[:]) + if err != nil { + return err + } + off += n + typ := buf[0] << 2 >> 2 // event type is bottom 6 bits + if typ == EvFrequency || (typ == EvBatch && seenBatch) { + break // found trailer, or next batch + } + if typ == EvBatch { + seenBatch = true + } + if typ == EvString { + // skip over it. error checking was done in file.go + _, off, _ = readVal(r, off) + var ln uint64 + ln, off, _ = readVal(r, off) + // PJW: why not just seek ahead ln bytes? + if false { + buf := make([]byte, ln) + var n int + n, _ = io.ReadFull(r, buf) + off += n + } else { + n, _ := r.Seek(int64(ln), 1) + off = int(n) + } + continue + } + // build the raw event and collect its arguments + ev := rawEvent{typ: typ, off: uint32(off0 - b.Off)} + var args []uint64 + off, args, err = p.argsAt(off0, typ) + if err != nil { + // PJW: make sure this is useful + return fmt.Errorf("parsing %s failed at P=%d off=%d %v", evname(typ), + b.P, off0, err) + } + + // have we seen the args before? + if len(args) > 0 { + ev.arg0 = args[0] + if len(args) > 1 { + hasher.Reset() + for i := 1; i < len(args); i++ { + var x [8]byte + binary.LittleEndian.PutUint64(x[:], args[i]) + _, err := hasher.Write(x[:]) + if err != nil { + log.Fatal(err) + } + } + hc := hasher.Sum64() + old, ok := p.seenArgs[hc] + if !ok { + final := make([]uint64, len(args)-1) + copy(final, args[1:]) + p.seenArgs[hc] = &final + } else { + // is this a collision? PJW: make this precisely right + if len(*old) != len(args[1:]) { + log.Fatalf("COLLISION old:%v this:%v", *old, args[1:]) + } + } + ev.args = p.seenArgs[hc] + } + } + if typ == EvUserLog { + // argsAt didn't read the string argument + var s string + s, off, err = readStr(r, off) + ev.sarg = s + } + evs = append(evs, ev) + } + b.raws = evs + return nil +} diff --git a/src/internal/traceparser/robust.go b/src/internal/traceparser/robust.go new file mode 100644 index 0000000000..91748c592f --- /dev/null +++ b/src/internal/traceparser/robust.go @@ -0,0 +1,585 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package traceparser + +// there are panics for impossible situations. probably an error would be better +// (if only it were certain these are impossible) + +import ( + "fmt" + "log" +) + +// repair an incomplete or possibly damaged interval of Events +// so that postProcess is happy + +// errors returned by checkRunning() +const ( + ok = 0 + badRunning = 1 << iota + badP + badG0 +) + +// states of g's and p's +type gdesc struct { + state gStatus + ev, evStart, evCreate, evMarkAssist *Event +} + +type pdesc struct { + running bool + g uint64 + evSTW, evSweep *Event +} + +func locstr(ev *Event) string { + if ev == nil { + return "" + } + return fmt.Sprintf("%s:%x", evname(ev.Type), ev.Ts) +} +func (p pdesc) String() string { + return fmt.Sprintf("[%v %d %s %s]", p.running, p.g, locstr(p.evSTW), locstr(p.evSweep)) +} + +func (g gdesc) String() string { + var nm string + switch g.state { + case gDead: + nm = "dead" + case gWaiting: + nm = "waiting" + case gRunnable: + nm = "runnable" + case gRunning: + nm = "running" + } + f := locstr + return fmt.Sprintf("[%s %s,%s,%s,%s]", nm, f(g.ev), f(g.evStart), + f(g.evCreate), f(g.evMarkAssist)) +} + +func checkRunning(pd pdesc, gd gdesc, ev *Event, okG0 bool) int { + ret := ok + if gd.state != gRunning { + ret |= badRunning + } + if pd.g != ev.G { + ret |= badP + } + if !okG0 && ev.G == 0 { + ret |= badG0 + } + return ret +} + +type aux struct { + pref []*Event // prefix + evs []*Event // copies and inserted + deleted map[byte]int // count by Type + inserted map[byte]int // count by Type + gs map[uint64]gdesc + ps map[int32]pdesc + g gdesc + px pdesc + my *Parsed + input []*Event // events in call to robust() + last int // last index handled by reorder + err error // report inconsistent trace files +} + +func (a *aux) preftime() int64 { + ts := a.my.MinWant - 1000 + if ts < 0 { + ts = 0 + } + if len(a.pref) > 0 { + ts = a.pref[len(a.pref)-1].Ts + 1 + } + return ts +} +func (a *aux) delete(i int, ev *Event) { + a.deleted[ev.Type]++ +} +func (a *aux) prefix(typ byte, g uint64, p int32) { + ts := a.preftime() + ev := &Event{Type: typ, G: g, P: p, Ts: ts, + Args: [3]uint64{0, 0, 1}} + a.pref = append(a.pref, ev) +} +func (a *aux) procstart(p int32) { + if p >= FakeP || a.px.running { + return + } + a.prefix(EvProcStart, 0, p) + a.px.running = true +} +func (a *aux) makewaiting(i int, g uint64, typ byte) { + // GoCreate, g=0 args[0]=g; maybe it exists already? + // GoWaiting or GoInSysCall + p := int32(a.my.batches[0].P) + ev := &Event{Type: EvGoCreate, P: p, + Ts: a.preftime(), Args: [3]uint64{g, 0, 2}} + a.pref = append(a.pref, ev) + a.gs[g] = gdesc{state: gRunnable, ev: ev, evCreate: ev} + ev = &Event{Type: typ, G: g, P: p, + Ts: a.preftime(), Args: [3]uint64{g, 0, 3}} + a.pref = append(a.pref, ev) + switch typ { + default: + panic(fmt.Sprintf("weird typ %s in makewaiting", evname(typ))) + case EvGoWaiting, EvGoInSyscall: + // ok + } +} + +func (a *aux) makerunnable(i int, ev *Event) { + // Create, Sched, Preempt, or Unblock + switch a.gs[ev.G].state { + case gDead: + p := int32(a.my.batches[0].P) + ev := &Event{Type: EvGoCreate, P: p, + Ts: a.preftime(), Args: [3]uint64{ev.G, 0, 4}} + a.pref = append(a.pref, ev) + a.gs[ev.Args[0]] = gdesc{state: gRunnable, ev: ev, evCreate: ev} + case gRunnable: + return + case gRunning: + //a.prevs(i) + a.err = fmt.Errorf("gRunning %d:%s", i, ev) + case gWaiting: + //a.prevs(i) + a.err = fmt.Errorf("no consistent ordering possible %d:%s", i, ev) + } +} +func (a *aux) makerunning(i int, ev *Event) { + // GoStart once it is runnable + switch a.g.state { + case gDead: + a.makerunnable(i, ev) + case gRunnable: + break + case gRunning: + return + case gWaiting: + a.err = fmt.Errorf("gWaiting in makerunnable %d:%s %+v", i, ev, a.g) + } + // PJW: which P? Probably need a ProcStart once + if !a.px.running { + a.procstart(ev.P) + } + p := ev.P + if p == TimerP { + p = int32(ev.Args[2]) // from events.go:71 + ev.Args[2] = 0 + } + x := &Event{Type: EvGoStart, G: ev.G, P: p, Args: [3]uint64{ev.G, 0, 5}} + x.Ts = ev.Ts - 1 + a.evs = append(a.evs, x) + a.g.state = gRunning + a.g.evStart = x + a.px.g = x.G + a.inserted[EvGoStart]++ +} + +func (p *Parsed) robust(events []*Event) ([]*Event, *aux, error) { // *aux for debugging (CheckRobust) + a := new(aux) + a.gs = make(map[uint64]gdesc) + a.ps = make(map[int32]pdesc) + var evGC, evSTW *Event + tasks := make(map[uint64]*Event) // task id to create + activeSpans := make(map[uint64][]*Event) + a.gs[0] = gdesc{state: gRunning} // bootstrap + a.deleted = make(map[byte]int) + a.inserted = make(map[byte]int) + a.my = p + a.input = events + + for i, ev := range events { + if a.err != nil { + break + } + if i < len(events)-1 && ev.Ts == events[i+1].Ts && + i > a.last { + // sigh. dragonfly, or similar trouble. + // a.last is to avoid overlapping calls + // This is a placeholder if needed. + //a.reorder(i, events) + ev = events[i] + } + var gok, pok bool + a.g, gok = a.gs[ev.G] + a.px, pok = a.ps[ev.P] + switch ev.Type { + case EvProcStart: + if a.px.running { // This doesn't happen, but to be safe + a.delete(i, ev) // already started + continue + } + a.px.running = true + case EvProcStop: + if !pok { // Ok to delete, as we've never heard of it + a.delete(i, ev) + continue + } + if !a.px.running { + a.procstart(ev.P) + } + if a.px.g != 0 { + // p is running a g! Stop the g? Ignore the Stop? + // Ignore the Stop. I don't think this happens. + // (unless there are equal Ts's or the file is corrupt) + a.err = fmt.Errorf("unexpected %d:%s %v", i, ev, a.px) + // a.delete(i, ev) // PJW + continue + } + a.px.running = false + case EvGCStart: + if evGC != nil { + // already running; doesn't happen + a.delete(i, ev) + continue + } + evGC = ev + case EvGCDone: + if evGC == nil { + // no GCStart to link it to: choice is lying about + // the duration or the existence. Do the latter + a.delete(i, ev) + continue + } + evGC = nil + case EvGCSTWStart: + evp := &evSTW + if p.Version < 1010 { + // Before 1.10, EvGCSTWStart was per-P. + evp = &a.px.evSTW + } + if *evp != nil { + // still running; doesn't happen + a.delete(i, ev) + continue + } + *evp = ev + case EvGCSTWDone: + evp := &evSTW + if p.Version < 1010 { + // Before 1.10, EvGCSTWDone was per-P. + evp = &a.px.evSTW + } + if *evp == nil { + // no STWStart to link to: choice is lying about + // duration or the existence. Do the latter. + a.delete(i, ev) + continue + } + *evp = nil + case EvGCMarkAssistStart: + if a.g.evMarkAssist != nil { + // already running; doesn't happen + a.delete(i, ev) + continue + } + a.g.evMarkAssist = ev + case EvGCMarkAssistDone: + // ok to be in progress + a.g.evMarkAssist = nil + case EvGCSweepStart: + if a.px.evSweep != nil { + // older one still running; doesn't happen + a.delete(i, ev) + continue + } + a.px.evSweep = ev + case EvGCSweepDone: + if a.px.evSweep == nil { + // no Start to link to: choice is lying about + // duration or existence. Do the latter. + a.delete(i, ev) + continue + } + a.px.evSweep = nil + case EvGoWaiting: + if a.g.state != gRunnable { + a.makerunnable(i, ev) + } + a.g.state = gWaiting + a.g.ev = ev + case EvGoInSyscall: // PJW: same as GoWaiting + if a.g.state != gRunnable { + a.makerunnable(i, ev) + } + a.g.state = gWaiting + a.g.ev = ev + case EvGoCreate: + if _, ok := a.gs[ev.Args[0]]; ok { + // this g already exists; doesn't happen + a.delete(i, ev) + continue + } + ret := checkRunning(a.px, a.g, ev, true) + if ret&badRunning != 0 { + a.makerunning(i, ev) + a.g.state = gRunning + } + if ret&badP != 0 { + a.procstart(ev.P) + } + a.gs[ev.Args[0]] = gdesc{state: gRunnable, ev: ev, + evCreate: ev} + case EvGoStart, EvGoStartLabel: + if a.g.state != gRunnable { + a.makerunnable(i, ev) + } + if a.px.g != 0 { + //a.prevs(i) + a.err = fmt.Errorf("p already running %d, %d:%s", + a.px.g, i, ev) + } + a.g.state = gRunning + a.g.evStart = ev // PJW: do we need g.evStart? + a.px.g = ev.G + a.g.evCreate = nil // PJW: do we need g.evCreate? + case EvGoEnd, EvGoStop: + if !gok { + // never heard of it; act as if it never existed + a.delete(i, ev) + continue + } + ret := checkRunning(a.px, a.g, ev, false) + if ret&badRunning != 0 { + a.makerunning(i, ev) + a.g.state = gRunning + } + if ret&badP != 0 { + a.procstart(ev.P) + } + if ret&badG0 != 0 { + // gok should have been false + panic(fmt.Sprintf("badG0 %d:%s", i, ev)) + } + a.g.evStart = nil + a.g.state = gDead + a.px.g = 0 + case EvGoSched, EvGoPreempt: + ret := checkRunning(a.px, a.g, ev, false) + if ret&badG0 != 0 { + // hopeless, we think. Don't know g + a.delete(i, ev) + } + if ret&badRunning != 0 { + a.makerunning(i, ev) + a.g.state = gRunning + } + if ret&badP != 0 { + a.procstart(ev.P) + } + a.g.state = gRunnable + a.g.evStart = nil + a.px.g = 0 + a.g.ev = ev + case EvGoUnblock: + // g == 0 is ok here (PJW) and elsewhere? + if a.g.state != gRunning { + a.makerunning(i, ev) + a.g.state = gRunning + } + if ev.P != TimerP && a.px.g != ev.G { + //a.prevs(i) + a.err = fmt.Errorf("%v not running %d:%s", + a.px, i, ev) + continue + } + g1, _ := a.gs[ev.Args[0]] + if g1.state != gWaiting { + a.makewaiting(i, ev.Args[0], EvGoWaiting) + g1.state = gWaiting + } + g1.state = gRunnable + g1.ev = ev + a.gs[ev.Args[0]] = g1 + // if p == TimerP, clean up from events.go:71 + ev.Args[2] = 0 // no point in checking p + case EvGoSysCall: + if ev.G == 0 { + // hopeless; don't know how to repair + a.delete(i, ev) + continue + } + ret := checkRunning(a.px, a.g, ev, false) + if ret&badRunning != 0 { + a.makerunning(i, ev) + a.g.state = gRunning + } + if ret&badP != 0 { + a.procstart(ev.P) + } + a.g.ev = ev + case EvGoSysBlock: + if ev.G == 0 { + // hopeless to repair + a.delete(i, ev) + } + ret := checkRunning(a.px, a.g, ev, false) + if ret&badRunning != 0 { + a.makerunning(i, ev) + a.g.state = gRunning + } + if ret&badP != 0 { + a.procstart(ev.P) + } + a.g.state = gWaiting + a.g.evStart = nil + a.px.g = 0 + case EvGoSysExit: + if ev.G == 0 { + // don't know how to repair + a.delete(i, ev) + continue + } + if a.g.state != gWaiting { + a.makewaiting(i, ev.G, EvGoInSyscall) + } + a.g.state = gRunnable + a.g.ev = ev + case EvGoSleep, EvGoBlock, EvGoBlockSend, EvGoBlockRecv, + EvGoBlockSelect, EvGoBlockSync, EvGoBlockCond, + EvGoBlockNet, EvGoBlockGC: + if ev.G == 0 { // don't know how to repair + a.delete(i, ev) + continue + } + ret := checkRunning(a.px, a.g, ev, false) + if ret&badRunning != 0 { + a.makerunning(i, ev) + a.g.state = gRunning + } + if ret&badP != 0 { + a.procstart(ev.P) + } + a.g.state = gWaiting + a.g.ev = ev + a.g.evStart = nil + a.px.g = 0 + case EvHeapAlloc, EvGomaxprocs, EvNextGC, EvUserLog: + a.makerunning(i, ev) + a.g.state = gRunning + a.px.g = ev.G + default: + return nil, nil, fmt.Errorf("robust: unexpected %d:%s", i, ev) + case EvUserTaskCreate: + taskid := ev.Args[0] + if _, ok := tasks[taskid]; ok { + // task id conflict, kill this one, believe the earlier one + a.delete(i, ev) + continue + } + tasks[ev.Args[0]] = ev + case EvUserTaskEnd: // nothing to do + case EvUserRegion: + mode := ev.Args[1] + spans := activeSpans[ev.G] + if mode == 0 { + activeSpans[ev.G] = append(spans, ev) + } else if mode == 1 { // span end + n := len(spans) + if n > 0 { + // check that spans match up; clean up if not + s := spans[n-1] + if s.Args[0] != ev.Args[0] || + s.SArgs[0] != ev.SArgs[0] { + // try to fix it + var ok bool + spans, ok = fixSpan(spans, ev) + if !ok { + // unfixed, toss this event + a.delete(i, ev) + continue + } + } + n = len(spans) + if n > 1 { + activeSpans[ev.G] = spans[:n-1] + } else { + delete(activeSpans, ev.G) + } + } + } else { + // invalid mode, toss it + a.delete(i, ev) + continue + } + } + a.gs[ev.G] = a.g + a.ps[ev.P] = a.px + a.evs = append(a.evs, ev) + } + ans := a.pref + ans = append(ans, a.evs...) + p.Preflen = len(a.pref) + p.Added = len(a.inserted) + p.Ignored = len(a.deleted) + return ans, a, a.err +} + +func fixSpan(spans []*Event, ev *Event) ([]*Event, bool) { + // probably indicates a corrupt trace file + panic("implement") +} + +type same struct { + ev *Event + g gdesc + p pdesc +} + +// This is a placeholder, to organize intervals with equal time stamps +func (a *aux) reorder(n int, events []*Event) { + // bunch of Events with equal time stamps + // We care about GoCreate, GoWaiting, GoInSyscall, + // GoStart (StartLocal, StartLabel), GoBlock*, + // GosSched, GoPreempt, GoUnblock, GoSysExit, + // (UnblockLocal, SysExitLocal), GCStart. + // maybe ProcStart and ProcStop? 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literal 0 HcmV?d00001 diff --git a/src/internal/traceparser/tr.go b/src/internal/traceparser/tr.go new file mode 100644 index 0000000000..770f280607 --- /dev/null +++ b/src/internal/traceparser/tr.go @@ -0,0 +1,498 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package traceparser parses the trace files produced by runtime.StartTrace +package traceparser + +import ( + "fmt" + "internal/traceparser/filebuf" + "io" + "strings" +) + +// Parsed is the result of parsing a trace file +type Parsed struct { + // Set by New + Name string // File's name + Size int64 // File's size + Count int64 // approximate number of all events + MaxTs int64 // range of all events, in nanoseconds + Strings map[uint64]string + Stacks map[uint32][]*Frame + Version int // version of the trace file from header + TicksPerSec int64 // from EvFrequency in trailer + minticks, maxticks int64 // from Init + r filebuf.Buf // implements io.Seek and io.Read + batches []batch // location of each Batch and time of start + timerGoids map[uint64]bool + // the following are per Parse + MinWant, MaxWant int64 // range wanted, from the arguments to Parse() + Err error // set by internal functions to stop further processing + Events []*Event // after Parse, the events from MinWant to MaxWant + Preflen int // how long a prefix we added + Ignored int // how many events we elided + Added int // how many events we added, not including the prefix + // internal processing variables + seenArgs map[uint64]*[]uint64 + byproc map[int][]*Event + lastGs map[int]uint64 + lastG uint64 + lastP int + lastTs int64 +} + +func (p *Parsed) String() string { + ans := []string{} + ans = append(ans, fmt.Sprintf("%s Sz:%d Count:%d MaxTs:%d #strs:%d #stks:%d", + p.Name, p.Size, p.Count, p.MaxTs, len(p.Strings), len(p.Stacks))) + ans = append(ans, fmt.Sprintf("%d clock:%d ticks:(%d,%d) #b:%d", + p.Version, p.TicksPerSec, p.minticks, p.maxticks, len(p.batches))) + return strings.Join(ans, "\n\t") +} + +// clean up after previous call to Parse +func (p *Parsed) clean() { + // some of these are redundant + p.Err = nil + p.Events = nil + p.Preflen = 0 + p.Ignored = 0 + p.Added = 0 + p.seenArgs = nil // redundant, but safe + p.byproc = nil + p.lastGs = nil + p.lastG = 0 + p.lastTs = 0 +} + +// Frame is a frame in a stack traces +type Frame struct { + PC uint64 + Fn string + File string + Line int +} + +// An Event is the parsed form of a single trace event +type Event struct { + Type byte + P int32 + Ts int64 + G uint64 + StkID uint32 // key to Parsed.Stacks + Args [3]uint64 + SArgs []string // EvUserLog has 2. Others are 1 or none + Link *Event +} + +// Batch remembers the EvBatch events. PJW: keep an index of User events? +type batch struct { + Off int + P int64 + Cycles int64 // as read from EvBatch + Nano int64 // start time of batch, set in commonInit() + raws []rawEvent // filled in during Parse() for those batches that overlap the desired interval +} + +// rawEvent is a raw event parsed from batches that overlap the time interval +type rawEvent struct { // about 75 bytes + // the choice of what to share (args) and what to make unique per rawEvent + // (arg0, sarg) was done by measuring the space impact of various choices. + off uint32 // offset in batch (at batch.Off + off in file) + typ byte + arg0 uint64 + args *[]uint64 // remainder of the args (frequently nil), shared + sarg string +} + +func (r rawEvent) String() string { + if r.args != nil && len(*r.args) > 0 { + return fmt.Sprintf("[%s %d %v %s]", evname(r.typ), r.arg0, *r.args, r.sarg) + } + return fmt.Sprintf("[%s, %d, [], %s]", evname(r.typ), r.arg0, r.sarg) +} + +// New scans the trace file, finding the number of events, the earliest and latest +// timestamps, and the stacks and strings referenced in the file. +func New(fname string) (*Parsed, error) { + fd, err := filebuf.New(fname) + if err != nil { + return nil, err + } + return commonInit(fd, fname) +} + +// ParseError may be returned by New() or ParseBuffer() to make available +// some information in the case that the raw trace file seems to contain +// negative time stamps. (In P, Name, Size, count, Strings, Stacks, Versions are valid, +// and MaxTs or TicksPerSec is negative.) +type ParseError struct { + P *Parsed + Err error +} + +func (pe ParseError) Error() string { + return pe.Err.Error() +} + +func commonInit(fd filebuf.Buf, fname string) (*Parsed, error) { + ans := &Parsed{Name: fname, minticks: 1 << 62} // minticks can only decrease + var err error + defer func() { + if err != nil { + fd.Close() // try to clean up after error + } + }() + ans.Size = fd.Size() + ans.r = fd + // parseRaw here for header, trailer: clock, stacks, strings, + if err = ans.parseHeader(); err != nil { + return nil, err + } + if err = ans.scanFile(); err != nil { + return nil, err + } + // done with seenArgs + ans.seenArgs = nil + // convert the clicks in batches to nanoseconds + ans.toNanoseconds() + if ans.MaxTs <= 0 || ans.TicksPerSec <= 0 { + err := ParseError{ + P: ans, + Err: fmt.Errorf("corrupt trace file: negative time: (max TS=%d, ticks per sec=%d", + ans.MaxTs, ans.TicksPerSec), + } + return nil, err + } + return ans, nil +} + +// Parse parses the events in the interval: start <= ts <= start+length. +// f, if not nil, will be called at various stages of the parse, each identified by the string +// argument. It could report on elapsed time, or memory usage, or whatever the user wants. +// The number of times it is called and the contents of the string argument are both +// changeable details of the implementation. Parse is not safe for concurrent use. +func (p *Parsed) Parse(start, length int64, f func(string)) error { + p.clean() + if f == nil { + f = func(string) {} // avoid any further testing for nil + } + + p.MinWant = start + p.MaxWant = start + length + // arrange the slice of batches by P + byp := map[int64][]*batch{} + // PJW: keep track of the order the Ps occur and use that for batchify + for i, b := range p.batches { + byp[b.P] = append(byp[b.P], &p.batches[i]) + p.batches[i].raws = nil // reset from last call to Parse + } + // batchify the ones that overlap the time range + for _, v := range byp { + for i := 0; i < len(v); i++ { + b := v[i] + var bnext *batch + if i < len(v)-1 { + bnext = v[i+1] + } + if b.Nano >= p.MaxWant { + // starts too late + continue + } else if b.Nano <= p.MinWant && (bnext != nil && bnext.Nano <= p.MinWant) { + // entirely too early + continue + } + err := p.batchify(b) + if err != nil { + return err + } + } + } + f("batchify done") + return p.createEvents(f) +} + +// ParseBuffer treats its argument as a trace file, and returns the +// result of parsing it +func ParseBuffer(rd io.Reader) (*Parsed, error) { + pr, err := filebuf.FromReader(rd) + if err != nil { + return nil, err + } + p, err := commonInit(pr, "") + if err != nil { + return nil, err + } + // need the version and the initial scan + err = p.Parse(0, 1<<62, nil) + if err != nil { + return nil, err + } + return p, nil +} + +// called from commonInit to compute the nanosecond when batches start +func (p *Parsed) toNanoseconds() { + minCycles := p.minticks + freq := 1e9 / float64(p.TicksPerSec) + // Batches, and more to come. Don't call this twice! + for i, ex := range p.batches { + p.batches[i].Nano = int64(float64(ex.Cycles-minCycles) * freq) + } + p.MaxTs = int64(float64(p.maxticks-minCycles) * freq) +} + +// argsAt returns the args of an event in the file and the offset for the next event. +// +// For EvString it returns off, nil, nil, and +// for EvUserLog it ignores the string argument, which must be read by the +// caller. +func (p *Parsed) argsAt(off int, check byte) (int, []uint64, error) { + off0 := off + r := p.r + loc, err := r.Seek(int64(off), 0) + if err != nil { + panic(err) + } + var buf [1]byte + n, err := r.Read(buf[:]) + if err != nil || n != 1 { + return 0, nil, fmt.Errorf("read failed at 0x%x, %d %v, loc=%d", + off, n, err, loc) + } + off += n + typ := buf[0] << 2 >> 2 + narg := buf[0]>>6 + 1 + inlineArgs := byte(4) + + if typ == EvNone || typ >= EvCount || + EventDescriptions[typ].MinVersion > p.Version { + return 0, nil, fmt.Errorf("unk type %v at offset 0x%x", typ, off0) + } + if typ == EvString { // skip, wihtout error checking + _, off, err = readVal(r, off) + var ln uint64 + ln, off, err = readVal(r, off) + off += int(ln) + return off, nil, nil + } + args := []uint64{} + if narg < inlineArgs { + for i := 0; i < int(narg); i++ { + var v uint64 + v, off, err = readVal(r, off) + if err != nil { + err = fmt.Errorf("failed to read event %v argument at offset %v (%v)", typ, off, err) + return 0, nil, err + } + args = append(args, v) + } + } else { + // More than inlineArgs args, the first value is length of the event in bytes. + var v uint64 + v, off, err = readVal(r, off) + if err != nil { + err = fmt.Errorf("failed to read event %v argument at offset %v (%v)", typ, off, err) + return 0, nil, err + } + evLen := v + off1 := off + for evLen > uint64(off-off1) { + v, off, err = readVal(r, off) + if err != nil { + err = fmt.Errorf("failed to read event %v argument at offset %v (%v)", typ, off, err) + return 0, nil, err + } + args = append(args, v) + } + if evLen != uint64(off-off1) { + err = fmt.Errorf("event has wrong length at offset 0x%x: want %v, got %v", off0, evLen, off-off1) + return 0, nil, err + } + } + // This routine does not read the string argument. Callers must tread EvUserLog specially. + return off, args, nil +} + +// read a string from r +func readStr(r io.Reader, off0 int) (s string, off int, err error) { + var sz uint64 + sz, off, err = readVal(r, off0) + if err != nil || sz == 0 { + return "", off, err + } + if sz > 1e6 { + return "", off, fmt.Errorf("string at offset %d is too large (len=%d)", off, sz) + } + buf := make([]byte, sz) + n, err := io.ReadFull(r, buf) + if err != nil || sz != uint64(n) { + return "", off + n, fmt.Errorf("failed to read trace at offset %d: read %v, want %v, error %v", off, n, sz, err) + } + return string(buf), off + n, nil +} + +// readVal reads unsigned base-128 value from r. +func readVal(r io.Reader, off0 int) (v uint64, off int, err error) { + off = off0 + for i := 0; i < 10; i++ { + var buf [1]byte + var n int + n, err = r.Read(buf[:]) + if err != nil || n != 1 { + return 0, 0, fmt.Errorf("failed to read trace at offset %d: read %v, error %v", off0, n, err) + } + off++ + v |= uint64(buf[0]&0x7f) << (uint(i) * 7) + if buf[0]&0x80 == 0 { + return + } + } + return 0, 0, fmt.Errorf("bad value at offset 0x%x", off0) +} + +// OSStats reports on the underlying i/o. If p was created by New, +// the fields report filesystem activity. If p was created by ParseBuffer, +// only Size is set. +func (p *Parsed) OSStats() filebuf.Stat { + return p.r.Stats() +} + +func (ev *Event) String() string { + var tslink int64 + if ev.Link != nil { + tslink = ev.Link.Ts + } + return fmt.Sprintf("[g:%d p:%d %s/%d %v %v %x ->%x]", + ev.G, ev.P, evname(ev.Type), ev.Type, + ev.Args, ev.SArgs, ev.Ts, tslink) + +} + +func evname(t byte) string { + if t >= EvCount || t < 0 { + return fmt.Sprintf("typ%d?", t) + } + return EventDescriptions[t].Name +} + +// Close the underlying file. +func (p *Parsed) Close() error { + return p.r.Close() +} + +// Event types in the trace. +// Verbatim copy from src/runtime/trace.go with the "trace" prefix removed. +const ( + EvNone = 0 // unused + EvBatch = 1 // start of per-P batch of events [pid, timestamp] + EvFrequency = 2 // contains tracer timer frequency [frequency (ticks per second)] + EvStack = 3 // stack [stack id, number of PCs, array of {PC, func string ID, file string ID, line}] + EvGomaxprocs = 4 // current value of GOMAXPROCS [timestamp, GOMAXPROCS, stack id] + EvProcStart = 5 // start of P [timestamp, thread id] + EvProcStop = 6 // stop of P [timestamp] + EvGCStart = 7 // GC start [timestamp, seq, stack id] + EvGCDone = 8 // GC done [timestamp] + EvGCSTWStart = 9 // GC mark termination start [timestamp, kind] + EvGCSTWDone = 10 // GC mark termination done [timestamp] + EvGCSweepStart = 11 // GC sweep start [timestamp, stack id] + EvGCSweepDone = 12 // GC sweep done [timestamp, swept, reclaimed] + EvGoCreate = 13 // goroutine creation [timestamp, new goroutine id, new stack id, stack id] + EvGoStart = 14 // goroutine starts running [timestamp, goroutine id, seq] + EvGoEnd = 15 // goroutine ends [timestamp] + EvGoStop = 16 // goroutine stops (like in select{}) [timestamp, stack] + EvGoSched = 17 // goroutine calls Gosched [timestamp, stack] + EvGoPreempt = 18 // goroutine is preempted [timestamp, stack] + EvGoSleep = 19 // goroutine calls Sleep [timestamp, stack] + EvGoBlock = 20 // goroutine blocks [timestamp, stack] + EvGoUnblock = 21 // goroutine is unblocked [timestamp, goroutine id, seq, stack] + EvGoBlockSend = 22 // goroutine blocks on chan send [timestamp, stack] + EvGoBlockRecv = 23 // goroutine blocks on chan recv [timestamp, stack] + EvGoBlockSelect = 24 // goroutine blocks on select [timestamp, stack] + EvGoBlockSync = 25 // goroutine blocks on Mutex/RWMutex [timestamp, stack] + EvGoBlockCond = 26 // goroutine blocks on Cond [timestamp, stack] + EvGoBlockNet = 27 // goroutine blocks on network [timestamp, stack] + EvGoSysCall = 28 // syscall enter [timestamp, stack] + EvGoSysExit = 29 // syscall exit [timestamp, goroutine id, seq, real timestamp] + EvGoSysBlock = 30 // syscall blocks [timestamp] + EvGoWaiting = 31 // denotes that goroutine is blocked when tracing starts [timestamp, goroutine id] + EvGoInSyscall = 32 // denotes that goroutine is in syscall when tracing starts [timestamp, goroutine id] + EvHeapAlloc = 33 // memstats.heap_live change [timestamp, heap_alloc] + EvNextGC = 34 // memstats.next_gc change [timestamp, next_gc] + EvTimerGoroutine = 35 // denotes timer goroutine [timer goroutine id] + EvFutileWakeup = 36 // denotes that the previous wakeup of this goroutine was futile [timestamp] + EvString = 37 // string dictionary entry [ID, length, string] + EvGoStartLocal = 38 // goroutine starts running on the same P as the last event [timestamp, goroutine id] + EvGoUnblockLocal = 39 // goroutine is unblocked on the same P as the last event [timestamp, goroutine id, stack] + EvGoSysExitLocal = 40 // syscall exit on the same P as the last event [timestamp, goroutine id, real timestamp] + EvGoStartLabel = 41 // goroutine starts running with label [timestamp, goroutine id, seq, label string id] + EvGoBlockGC = 42 // goroutine blocks on GC assist [timestamp, stack] + EvGCMarkAssistStart = 43 // GC mark assist start [timestamp, stack] + EvGCMarkAssistDone = 44 // GC mark assist done [timestamp] + EvUserTaskCreate = 45 // trace.NewContext [timestamp, internal task id, internal parent id, stack, name string] + EvUserTaskEnd = 46 // end of task [timestamp, internal task id, stack] + EvUserRegion = 47 // trace.WithSpan [timestamp, internal task id, mode(0:start, 1:end), stack, name string] + EvUserLog = 48 // trace.Log [timestamp, internal id, key string id, stack, value string] + EvCount = 49 +) + +// EventDescriptions describe the Events +var EventDescriptions = [EvCount]struct { + Name string + MinVersion int + Stack bool + Args []string + SArgs []string // string arguments +}{ + EvNone: {"None", 1005, false, []string{}, nil}, + EvBatch: {"Batch", 1005, false, []string{"p", "ticks"}, nil}, // in 1.5 format it was {"p", "seq", "ticks"} + EvFrequency: {"Frequency", 1005, false, []string{"freq"}, nil}, // in 1.5 format it was {"freq", "unused"} + EvStack: {"Stack", 1005, false, []string{"id", "siz"}, nil}, + EvGomaxprocs: {"Gomaxprocs", 1005, true, []string{"procs"}, nil}, + EvProcStart: {"ProcStart", 1005, false, []string{"thread"}, nil}, + EvProcStop: {"ProcStop", 1005, false, []string{}, nil}, + EvGCStart: {"GCStart", 1005, true, []string{"seq"}, nil}, // in 1.5 format it was {} + EvGCDone: {"GCDone", 1005, false, []string{}, nil}, + EvGCSTWStart: {"GCSTWStart", 1005, false, []string{"kindid"}, []string{"kind"}}, // <= 1.9, args was {} (implicitly {0}) + EvGCSTWDone: {"GCSTWDone", 1005, false, []string{}, nil}, + EvGCSweepStart: {"GCSweepStart", 1005, true, []string{}, nil}, + EvGCSweepDone: {"GCSweepDone", 1005, false, []string{"swept", "reclaimed"}, nil}, // before 1.9, format was {} + EvGoCreate: {"GoCreate", 1005, true, []string{"g", "stack"}, nil}, + EvGoStart: {"GoStart", 1005, false, []string{"g", "seq"}, nil}, // in 1.5 format it was {"g"} + EvGoEnd: {"GoEnd", 1005, false, []string{}, nil}, + EvGoStop: {"GoStop", 1005, true, []string{}, nil}, + EvGoSched: {"GoSched", 1005, true, []string{}, nil}, + EvGoPreempt: {"GoPreempt", 1005, true, []string{}, nil}, + EvGoSleep: {"GoSleep", 1005, true, []string{}, nil}, + EvGoBlock: {"GoBlock", 1005, true, []string{}, nil}, + EvGoUnblock: {"GoUnblock", 1005, true, []string{"g", "seq"}, nil}, // in 1.5 format it was {"g"} + EvGoBlockSend: {"GoBlockSend", 1005, true, []string{}, nil}, + EvGoBlockRecv: {"GoBlockRecv", 1005, true, []string{}, nil}, + EvGoBlockSelect: {"GoBlockSelect", 1005, true, []string{}, nil}, + EvGoBlockSync: {"GoBlockSync", 1005, true, []string{}, nil}, + EvGoBlockCond: {"GoBlockCond", 1005, true, []string{}, nil}, + EvGoBlockNet: {"GoBlockNet", 1005, true, []string{}, nil}, + EvGoSysCall: {"GoSysCall", 1005, true, []string{}, nil}, + EvGoSysExit: {"GoSysExit", 1005, false, []string{"g", "seq", "ts"}, nil}, + EvGoSysBlock: {"GoSysBlock", 1005, false, []string{}, nil}, + EvGoWaiting: {"GoWaiting", 1005, false, []string{"g"}, nil}, + EvGoInSyscall: {"GoInSyscall", 1005, false, []string{"g"}, nil}, + EvHeapAlloc: {"HeapAlloc", 1005, false, []string{"mem"}, nil}, + EvNextGC: {"NextGC", 1005, false, []string{"mem"}, nil}, + EvTimerGoroutine: {"TimerGoroutine", 1005, false, []string{"g"}, nil}, // in 1.5 format it was {"g", "unused"} + EvFutileWakeup: {"FutileWakeup", 1005, false, []string{}, nil}, + EvString: {"String", 1007, false, []string{}, nil}, + EvGoStartLocal: {"GoStartLocal", 1007, false, []string{"g"}, nil}, + EvGoUnblockLocal: {"GoUnblockLocal", 1007, true, []string{"g"}, nil}, + EvGoSysExitLocal: {"GoSysExitLocal", 1007, false, []string{"g", "ts"}, nil}, + EvGoStartLabel: {"GoStartLabel", 1008, false, []string{"g", "seq", "labelid"}, []string{"label"}}, + EvGoBlockGC: {"GoBlockGC", 1008, true, []string{}, nil}, + EvGCMarkAssistStart: {"GCMarkAssistStart", 1009, true, []string{}, nil}, + EvGCMarkAssistDone: {"GCMarkAssistDone", 1009, false, []string{}, nil}, + EvUserTaskCreate: {"UserTaskCreate", 1011, true, []string{"taskid", "pid", "typeid"}, []string{"name"}}, + EvUserTaskEnd: {"UserTaskEnd", 1011, true, []string{"taskid"}, nil}, + EvUserRegion: {"UserRegion", 1011, true, []string{"taskid", "mode", "typeid"}, []string{"name"}}, + EvUserLog: {"UserLog", 1011, true, []string{"id", "keyid"}, []string{"category", "message"}}, +} diff --git a/src/internal/traceparser/writer.go b/src/internal/traceparser/writer.go new file mode 100644 index 0000000000..498bed72f3 --- /dev/null +++ b/src/internal/traceparser/writer.go @@ -0,0 +1,52 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package traceparser + +// test routines used by tests in the trace commands + +import "bytes" + +// Writer is a test trace writer. +type Writer struct { + bytes.Buffer +} + +// NewWriter provides the test Writer +func NewWriter() *Writer { + w := new(Writer) + w.Write([]byte("go 1.9 trace\x00\x00\x00\x00")) + return w +} + +// Emit writes an event record to the trace. +// See Event types for valid types and required arguments. +func (w *Writer) Emit(typ byte, args ...uint64) { + nargs := byte(len(args)) - 1 + if nargs > 3 { + nargs = 3 + } + buf := []byte{typ | nargs<<6} + if nargs == 3 { + buf = append(buf, 0) + } + for _, a := range args { + buf = appendVarint(buf, a) + } + if nargs == 3 { + buf[1] = byte(len(buf) - 2) + } + n, err := w.Write(buf) + if n != len(buf) || err != nil { + panic("failed to write") + } +} + +func appendVarint(buf []byte, v uint64) []byte { + for ; v >= 0x80; v >>= 7 { + buf = append(buf, 0x80|byte(v)) + } + buf = append(buf, byte(v)) + return buf +} From b171b281386670713acf3d5a696b1f520b60798e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= Date: Fri, 28 Sep 2018 16:19:18 +0200 Subject: [PATCH 223/240] cmd/link: add new loading package for XCOFF files This commit adds the new package cmd/link/internal/loadxcoff. It also adds a new symbol kind in cmd/link/internal/sym package, which aims to represent TOC entries for XCOFF files. cmd/dist is updated to add this new package and cmd/internal/xcoff during the bootstrap. Updates: #25893 Change-Id: I42b6578cf0ba4cc28ad4aa98122a91ab1d1bbf6e Reviewed-on: https://go-review.googlesource.com/c/138728 Run-TryBot: Tobias Klauser TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/cmd/dist/buildtool.go | 1 + src/cmd/link/internal/loadxcoff/ldxcoff.go | 225 ++++++++++++++++++++ src/cmd/link/internal/sym/symkind.go | 1 + src/cmd/link/internal/sym/symkind_string.go | 4 +- 4 files changed, 229 insertions(+), 2 deletions(-) create mode 100644 src/cmd/link/internal/loadxcoff/ldxcoff.go diff --git a/src/cmd/dist/buildtool.go b/src/cmd/dist/buildtool.go index 2058c721c5..2db115e20e 100644 --- a/src/cmd/dist/buildtool.go +++ b/src/cmd/dist/buildtool.go @@ -74,6 +74,7 @@ var bootstrapDirs = []string{ "cmd/link/internal/loadelf", "cmd/link/internal/loadmacho", "cmd/link/internal/loadpe", + "cmd/link/internal/loadxcoff", "cmd/link/internal/mips", "cmd/link/internal/mips64", "cmd/link/internal/objfile", diff --git a/src/cmd/link/internal/loadxcoff/ldxcoff.go b/src/cmd/link/internal/loadxcoff/ldxcoff.go new file mode 100644 index 0000000000..7204d34388 --- /dev/null +++ b/src/cmd/link/internal/loadxcoff/ldxcoff.go @@ -0,0 +1,225 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package loadxcoff implements a XCOFF file reader. +package loadxcoff + +import ( + "cmd/internal/bio" + "cmd/internal/objabi" + "cmd/internal/sys" + "cmd/internal/xcoff" + "cmd/link/internal/sym" + "errors" + "fmt" +) + +// ldSection is an XCOFF section with its symbols. +type ldSection struct { + xcoff.Section + sym *sym.Symbol +} + +// TODO(brainman): maybe just add ReadAt method to bio.Reader instead of creating xcoffBiobuf + +// xcoffBiobuf makes bio.Reader look like io.ReaderAt. +type xcoffBiobuf bio.Reader + +func (f *xcoffBiobuf) ReadAt(p []byte, off int64) (int, error) { + ret := ((*bio.Reader)(f)).Seek(off, 0) + if ret < 0 { + return 0, errors.New("fail to seek") + } + n, err := f.Read(p) + if err != nil { + return 0, err + } + return n, nil +} + +// Load loads the Xcoff file pn from f. +// Symbols are written into syms, and a slice of the text symbols is returned. +func Load(arch *sys.Arch, syms *sym.Symbols, input *bio.Reader, pkg string, length int64, pn string) (textp []*sym.Symbol, err error) { + errorf := func(str string, args ...interface{}) ([]*sym.Symbol, error) { + return nil, fmt.Errorf("loadxcoff: %v: %v", pn, fmt.Sprintf(str, args...)) + } + localSymVersion := syms.IncVersion() + + var ldSections []*ldSection + + f, err := xcoff.NewFile((*xcoffBiobuf)(input)) + if err != nil { + return nil, err + } + defer f.Close() + + for _, sect := range f.Sections { + //only text, data and bss section + if sect.Type < xcoff.STYP_TEXT || sect.Type > xcoff.STYP_BSS { + continue + } + lds := new(ldSection) + lds.Section = *sect + name := fmt.Sprintf("%s(%s)", pkg, lds.Name) + s := syms.Lookup(name, localSymVersion) + + switch lds.Type { + default: + return errorf("unrecognized section type 0x%x", lds.Type) + case xcoff.STYP_TEXT: + s.Type = sym.STEXT + case xcoff.STYP_DATA: + s.Type = sym.SNOPTRDATA + case xcoff.STYP_BSS: + s.Type = sym.SNOPTRBSS + } + + s.Size = int64(lds.Size) + if s.Type != sym.SNOPTRBSS { + data, err := lds.Section.Data() + if err != nil { + return nil, err + } + s.P = data + } + + lds.sym = s + ldSections = append(ldSections, lds) + } + + // sx = symbol from file + // s = symbol for syms + for _, sx := range f.Symbols { + // get symbol type + stype, errmsg := getSymbolType(f, sx) + if errmsg != "" { + return errorf("error reading symbol %s: %s", sx.Name, errmsg) + } + if stype == sym.Sxxx { + continue + } + + s := syms.Lookup(sx.Name, 0) + + // Text symbol + if s.Type == sym.STEXT { + if s.Attr.OnList() { + return errorf("symbol %s listed multiple times", s.Name) + } + s.Attr |= sym.AttrOnList + textp = append(textp, s) + } + } + + // Read relocations + for _, sect := range ldSections { + // TODO(aix): Dwarf section relocation if needed + if sect.Type != xcoff.STYP_TEXT && sect.Type != xcoff.STYP_DATA { + continue + } + rs := make([]sym.Reloc, sect.Nreloc) + for i, rx := range sect.Relocs { + r := &rs[i] + + r.Sym = syms.Lookup(rx.Symbol.Name, 0) + if uint64(int32(rx.VirtualAddress)) != rx.VirtualAddress { + return errorf("virtual address of a relocation is too big: 0x%x", rx.VirtualAddress) + } + r.Off = int32(rx.VirtualAddress) + switch rx.Type { + default: + return errorf("section %s: unknown relocation of type 0x%x", sect.Name, rx.Type) + case xcoff.R_POS: + // Reloc the address of r.Sym + // Length should be 64 + if rx.Length != 64 { + return errorf("section %s: relocation R_POS has length different from 64: %d", sect.Name, rx.Length) + } + r.Siz = 8 + r.Type = objabi.R_CONST + r.Add = int64(rx.Symbol.Value) + + case xcoff.R_RBR: + r.Siz = 4 + r.Type = objabi.R_CALLPOWER + r.Add = 0 // + + } + } + s := sect.sym + s.R = rs + s.R = s.R[:sect.Nreloc] + } + return textp, nil + +} + +// Convert symbol xcoff type to sym.SymKind +// Returns nil if this shouldn't be added into syms (like .file or .dw symbols ) +func getSymbolType(f *xcoff.File, s *xcoff.Symbol) (stype sym.SymKind, err string) { + // .file symbol + if s.SectionNumber == -2 { + if s.StorageClass == xcoff.C_FILE { + return sym.Sxxx, "" + } + return sym.Sxxx, "unrecognised StorageClass for sectionNumber = -2" + } + + // extern symbols + // TODO(aix) + if s.SectionNumber == 0 { + return sym.Sxxx, "" + } + + sectType := f.Sections[s.SectionNumber-1].SectionHeader.Type + switch sectType { + default: + return sym.Sxxx, fmt.Sprintf("getSymbolType for Section type 0x%x not implemented", sectType) + case xcoff.STYP_DWARF, xcoff.STYP_DEBUG: + return sym.Sxxx, "" + case xcoff.STYP_DATA, xcoff.STYP_BSS, xcoff.STYP_TEXT: + } + + switch s.StorageClass { + default: + return sym.Sxxx, fmt.Sprintf("getSymbolType for Storage class 0x%x not implemented", s.StorageClass) + case xcoff.C_HIDEXT, xcoff.C_EXT, xcoff.C_WEAKEXT: + switch s.AuxCSect.StorageMappingClass { + default: + return sym.Sxxx, fmt.Sprintf("getSymbolType for Storage class 0x%x and Storage Map 0x%x not implemented", s.StorageClass, s.AuxCSect.StorageMappingClass) + + // Program Code + case xcoff.XMC_PR: + if sectType == xcoff.STYP_TEXT { + return sym.STEXT, "" + } + return sym.Sxxx, fmt.Sprintf("unrecognised Section Type 0x%x for Storage Class 0x%x with Storage Map XMC_PR", sectType, s.StorageClass) + + // Read/Write Data + case xcoff.XMC_RW: + if sectType == xcoff.STYP_DATA { + return sym.SDATA, "" + } + if sectType == xcoff.STYP_BSS { + return sym.SBSS, "" + } + return sym.Sxxx, fmt.Sprintf("unrecognised Section Type 0x%x for Storage Class 0x%x with Storage Map XMC_RW", sectType, s.StorageClass) + + // Function descriptor + case xcoff.XMC_DS: + if sectType == xcoff.STYP_DATA { + return sym.SDATA, "" + } + return sym.Sxxx, fmt.Sprintf("unrecognised Section Type 0x%x for Storage Class 0x%x with Storage Map XMC_DS", sectType, s.StorageClass) + + // TOC anchor and TOC entry + case xcoff.XMC_TC0, xcoff.XMC_TE: + if sectType == xcoff.STYP_DATA { + return sym.SXCOFFTOC, "" + } + return sym.Sxxx, fmt.Sprintf("unrecognised Section Type 0x%x for Storage Class 0x%x with Storage Map XMC_DS", sectType, s.StorageClass) + + } + } +} diff --git a/src/cmd/link/internal/sym/symkind.go b/src/cmd/link/internal/sym/symkind.go index 2e21cc1f00..b1756d6145 100644 --- a/src/cmd/link/internal/sym/symkind.go +++ b/src/cmd/link/internal/sym/symkind.go @@ -92,6 +92,7 @@ const ( SBSS SNOPTRBSS STLSBSS + SXCOFFTOC SXREF SMACHOSYMSTR SMACHOSYMTAB diff --git a/src/cmd/link/internal/sym/symkind_string.go b/src/cmd/link/internal/sym/symkind_string.go index e7e56c4003..7428503b1c 100644 --- a/src/cmd/link/internal/sym/symkind_string.go +++ b/src/cmd/link/internal/sym/symkind_string.go @@ -4,9 +4,9 @@ package sym import "strconv" -const _SymKind_name = "SxxxSTEXTSELFRXSECTSTYPESSTRINGSGOSTRINGSGOFUNCSGCBITSSRODATASFUNCTABSELFROSECTSMACHOPLTSTYPERELROSSTRINGRELROSGOSTRINGRELROSGOFUNCRELROSGCBITSRELROSRODATARELROSFUNCTABRELROSTYPELINKSITABLINKSSYMTABSPCLNTABSELFSECTSMACHOSMACHOGOTSWINDOWSSELFGOTSNOPTRDATASINITARRSDATASBSSSNOPTRBSSSTLSBSSSXREFSMACHOSYMSTRSMACHOSYMTABSMACHOINDIRECTPLTSMACHOINDIRECTGOTSFILEPATHSCONSTSDYNIMPORTSHOSTOBJSDWARFSECTSDWARFINFOSDWARFRANGESDWARFLOCSDWARFMISC" +const _SymKind_name = "SxxxSTEXTSELFRXSECTSTYPESSTRINGSGOSTRINGSGOFUNCSGCBITSSRODATASFUNCTABSELFROSECTSMACHOPLTSTYPERELROSSTRINGRELROSGOSTRINGRELROSGOFUNCRELROSGCBITSRELROSRODATARELROSFUNCTABRELROSTYPELINKSITABLINKSSYMTABSPCLNTABSELFSECTSMACHOSMACHOGOTSWINDOWSSELFGOTSNOPTRDATASINITARRSDATASBSSSNOPTRBSSSTLSBSSSXCOFFTOCSXREFSMACHOSYMSTRSMACHOSYMTABSMACHOINDIRECTPLTSMACHOINDIRECTGOTSFILEPATHSCONSTSDYNIMPORTSHOSTOBJSDWARFSECTSDWARFINFOSDWARFRANGESDWARFLOCSDWARFMISC" -var _SymKind_index = [...]uint16{0, 4, 9, 19, 24, 31, 40, 47, 54, 61, 69, 79, 88, 98, 110, 124, 136, 148, 160, 173, 182, 191, 198, 206, 214, 220, 229, 237, 244, 254, 262, 267, 271, 280, 287, 292, 304, 316, 333, 350, 359, 365, 375, 383, 393, 403, 414, 423, 433} +var _SymKind_index = [...]uint16{0, 4, 9, 19, 24, 31, 40, 47, 54, 61, 69, 79, 88, 98, 110, 124, 136, 148, 160, 173, 182, 191, 198, 206, 214, 220, 229, 237, 244, 254, 262, 267, 271, 280, 287, 296, 301, 313, 325, 342, 359, 368, 374, 384, 392, 402, 412, 423, 432, 442} func (i SymKind) String() string { if i >= SymKind(len(_SymKind_index)-1) { From c9bc1340527c74c320028f2a35407a747e4ecda7 Mon Sep 17 00:00:00 2001 From: Hana Kim Date: Tue, 23 Oct 2018 01:29:40 -0400 Subject: [PATCH 224/240] cmd/go/internal/modload: fix use of //go:linkname I can't find the exact rule about space before compiler directive openings from https://golang.org/cmd/compile/#hdr-Compiler_Directives but it seems like the compiler doesn't recognize it as a compiler directive if it is preceded by space. Removing the space made the //go:linkname in the __gomod__.go file working as intended. Manually tested. Update #26404 Change-Id: I589f7203a628b2fa6238d82878029e0f098091b6 Reviewed-on: https://go-review.googlesource.com/c/143977 Reviewed-by: Bryan C. Mills Run-TryBot: Bryan C. Mills TryBot-Result: Gobot Gobot --- src/cmd/go/internal/modload/build.go | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/src/cmd/go/internal/modload/build.go b/src/cmd/go/internal/modload/build.go index 4e7741c5fb..a506c25dc7 100644 --- a/src/cmd/go/internal/modload/build.go +++ b/src/cmd/go/internal/modload/build.go @@ -239,13 +239,10 @@ func ModInfoProg(info string) []byte { // Populate it in an init func so that it will work with go:linkname, // but use a string constant instead of the name 'string' in case // package main shadows the built-in 'string' with some local declaration. - return []byte(fmt.Sprintf(` - package main - import _ "unsafe" - //go:linkname __debug_modinfo__ runtime/debug.modinfo - var __debug_modinfo__ = "" - func init() { - __debug_modinfo__ = %q - } + return []byte(fmt.Sprintf(`package main +import _ "unsafe" +//go:linkname __debug_modinfo__ runtime/debug.modinfo +var __debug_modinfo__ = "" +func init() { __debug_modinfo__ = %q } `, string(infoStart)+info+string(infoEnd))) } From 0d6569346ef3709052bad4a714634389f083dc3e Mon Sep 17 00:00:00 2001 From: diplozoon Date: Tue, 23 Oct 2018 13:17:20 +0000 Subject: [PATCH 225/240] cmd/go: remove unnecessary else conditions Fixes golint warning about "if block ends with a return statement, so drop this else and outdent its block". Change-Id: I6fc8724f586efcb6e2ed92ee36be421d3e9a8c80 Reviewed-on: https://go-review.googlesource.com/c/144137 Reviewed-by: Ralph Corderoy Reviewed-by: Ian Lance Taylor Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot --- src/cmd/go/internal/semver/semver.go | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/src/cmd/go/internal/semver/semver.go b/src/cmd/go/internal/semver/semver.go index 4af7118e55..d61c6b476a 100644 --- a/src/cmd/go/internal/semver/semver.go +++ b/src/cmd/go/internal/semver/semver.go @@ -312,9 +312,8 @@ func compareInt(x, y string) int { } if x < y { return -1 - } else { - return +1 } + return +1 } func comparePrerelease(x, y string) int { @@ -353,9 +352,8 @@ func comparePrerelease(x, y string) int { if ix != iy { if ix { return -1 - } else { - return +1 } + return +1 } if ix { if len(dx) < len(dy) { @@ -367,16 +365,14 @@ func comparePrerelease(x, y string) int { } if dx < dy { return -1 - } else { - return +1 } + return +1 } } if x == "" { return -1 - } else { - return +1 } + return +1 } func nextIdent(x string) (dx, rest string) { From e850b3752f49db4c93ebf549400b2d79f6801c9a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cl=C3=A9ment=20Chigot?= Date: Tue, 23 Oct 2018 15:55:57 +0200 Subject: [PATCH 226/240] net: fix TestInterfaceMulticastAddrs for AIX This commit disables checkMulticastStats for AIX operating system. Change-Id: If8d0fb609a0dcf75b7bb5c3871cfb6fad76a0a92 Reviewed-on: https://go-review.googlesource.com/c/144102 Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot Reviewed-by: Ian Lance Taylor --- src/net/interface_test.go | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/net/interface_test.go b/src/net/interface_test.go index 5d183c5638..c6b514abce 100644 --- a/src/net/interface_test.go +++ b/src/net/interface_test.go @@ -278,7 +278,7 @@ func checkUnicastStats(ifStats *ifStats, uniStats *routeStats) error { func checkMulticastStats(ifStats *ifStats, uniStats, multiStats *routeStats) error { switch runtime.GOOS { - case "dragonfly", "nacl", "netbsd", "openbsd", "plan9", "solaris": + case "aix", "dragonfly", "nacl", "netbsd", "openbsd", "plan9", "solaris": default: // Test the existence of connected multicast route // clones for IPv4. Unlike IPv6, IPv4 multicast From 72f099c36bf2599ce73d054d463fc2950cfdcb05 Mon Sep 17 00:00:00 2001 From: Alberto Donizetti Date: Sat, 20 Oct 2018 20:08:57 +0200 Subject: [PATCH 227/240] cmd/compile: preallocate in, out arrays in methodfunc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This gives a modest (but measurable) reduction in the number of allocations when building the compilebench packages. It's safe and exact (there's no heuristic or guessing, the lenghts of in and out are known when we enter the function), so it may be worth it. name old time/op new time/op delta Template 236ms ±23% 227ms ± 8% ~ (p=0.955 n=8+7) Unicode 112ms ± 7% 111ms ± 8% ~ (p=0.798 n=8+8) GoTypes 859ms ± 6% 874ms ± 6% ~ (p=0.442 n=8+8) Compiler 3.90s ±12% 3.85s ± 9% ~ (p=0.878 n=8+8) SSA 12.1s ± 7% 11.9s ± 8% ~ (p=0.798 n=8+8) Flate 151ms ±13% 157ms ±14% ~ (p=0.382 n=8+8) GoParser 190ms ±14% 192ms ±10% ~ (p=0.645 n=8+8) Reflect 554ms ± 5% 555ms ± 9% ~ (p=0.878 n=8+8) Tar 220ms ±19% 212ms ± 6% ~ (p=0.867 n=8+7) XML 296ms ±16% 303ms ±13% ~ (p=0.574 n=8+8) name old alloc/op new alloc/op delta Template 35.4MB ± 0% 35.4MB ± 0% -0.03% (p=0.021 n=8+8) Unicode 29.2MB ± 0% 29.2MB ± 0% ~ (p=0.645 n=8+8) GoTypes 123MB ± 0% 123MB ± 0% -0.02% (p=0.001 n=7+8) Compiler 514MB ± 0% 514MB ± 0% ~ (p=0.336 n=8+7) SSA 1.94GB ± 0% 1.94GB ± 0% -0.00% (p=0.004 n=8+7) Flate 24.5MB ± 0% 24.5MB ± 0% -0.03% (p=0.015 n=8+8) GoParser 28.7MB ± 0% 28.7MB ± 0% ~ (p=0.279 n=8+8) Reflect 87.4MB ± 0% 87.4MB ± 0% -0.02% (p=0.000 n=8+8) Tar 35.2MB ± 0% 35.2MB ± 0% -0.02% (p=0.007 n=8+8) XML 47.4MB ± 0% 47.4MB ± 0% ~ (p=0.083 n=8+8) name old allocs/op new allocs/op delta Template 348k ± 0% 348k ± 0% -0.15% (p=0.000 n=8+8) Unicode 339k ± 0% 339k ± 0% ~ (p=0.195 n=8+8) GoTypes 1.28M ± 0% 1.27M ± 0% -0.20% (p=0.000 n=8+8) Compiler 4.88M ± 0% 4.88M ± 0% -0.15% (p=0.000 n=8+8) SSA 15.2M ± 0% 15.2M ± 0% -0.02% (p=0.000 n=8+7) Flate 234k ± 0% 233k ± 0% -0.34% (p=0.000 n=8+8) GoParser 291k ± 0% 291k ± 0% -0.13% (p=0.000 n=8+8) Reflect 1.05M ± 0% 1.05M ± 0% -0.20% (p=0.000 n=8+8) Tar 344k ± 0% 343k ± 0% -0.22% (p=0.000 n=8+8) XML 430k ± 0% 429k ± 0% -0.24% (p=0.000 n=8+8) Change-Id: I0044b99079ef211003325a7f136e35b55cc5cb74 Reviewed-on: https://go-review.googlesource.com/c/143638 Reviewed-by: Keith Randall --- src/cmd/compile/internal/gc/reflect.go | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/src/cmd/compile/internal/gc/reflect.go b/src/cmd/compile/internal/gc/reflect.go index 4298805903..e4008bd7e7 100644 --- a/src/cmd/compile/internal/gc/reflect.go +++ b/src/cmd/compile/internal/gc/reflect.go @@ -320,7 +320,12 @@ func hiter(t *types.Type) *types.Type { // f is method type, with receiver. // return function type, receiver as first argument (or not). func methodfunc(f *types.Type, receiver *types.Type) *types.Type { - var in []*Node + inLen := f.Params().Fields().Len() + if receiver != nil { + inLen++ + } + in := make([]*Node, 0, inLen) + if receiver != nil { d := anonfield(receiver) in = append(in, d) @@ -332,7 +337,8 @@ func methodfunc(f *types.Type, receiver *types.Type) *types.Type { in = append(in, d) } - var out []*Node + outLen := f.Results().Fields().Len() + out := make([]*Node, 0, outLen) for _, t := range f.Results().Fields().Slice() { d := anonfield(t.Type) out = append(out, d) From 286c7ae10c71a8faeba22e29928afe7fce7e2750 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Mon, 22 Oct 2018 20:40:03 +0200 Subject: [PATCH 228/240] runtime: use multiplication with overflow check for makechan MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This improves performance for channels with an element size larger than 32 bytes and removes loading a value from the maxElems array for smaller element sizes. MakeChan/Byte 88.8ns ± 6% 85.2ns ± 1% -4.03% (p=0.000 n=10+10) MakeChan/Int 100ns ± 4% 96ns ± 2% -3.72% (p=0.000 n=9+10) MakeChan/Ptr 124ns ± 3% 126ns ± 2% ~ (p=0.068 n=10+10) MakeChan/Struct/0 80.5ns ± 2% 80.7ns ± 2% ~ (p=0.697 n=10+10) MakeChan/Struct/32 143ns ± 4% 141ns ± 2% ~ (p=0.221 n=10+10) MakeChan/Struct/40 169ns ± 2% 159ns ± 4% -6.26% (p=0.000 n=10+10) Updates #21588 Change-Id: Ifbf12a5af2f0ec7e1d2241ecfffab020e9abec48 Reviewed-on: https://go-review.googlesource.com/c/144017 Reviewed-by: Keith Randall --- src/runtime/chan.go | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/src/runtime/chan.go b/src/runtime/chan.go index 5cf0b86f58..8662f00e13 100644 --- a/src/runtime/chan.go +++ b/src/runtime/chan.go @@ -19,6 +19,7 @@ package runtime import ( "runtime/internal/atomic" + "runtime/internal/math" "unsafe" ) @@ -78,7 +79,8 @@ func makechan(t *chantype, size int) *hchan { throw("makechan: bad alignment") } - if size < 0 || uintptr(size) > maxSliceCap(elem.size) || uintptr(size)*elem.size > maxAlloc-hchanSize { + mem, overflow := math.MulUintptr(elem.size, uintptr(size)) + if overflow || mem > maxAlloc-hchanSize || size < 0 { panic(plainError("makechan: size out of range")) } @@ -88,7 +90,7 @@ func makechan(t *chantype, size int) *hchan { // TODO(dvyukov,rlh): Rethink when collector can move allocated objects. var c *hchan switch { - case size == 0 || elem.size == 0: + case mem == 0: // Queue or element size is zero. c = (*hchan)(mallocgc(hchanSize, nil, true)) // Race detector uses this location for synchronization. @@ -96,12 +98,12 @@ func makechan(t *chantype, size int) *hchan { case elem.kind&kindNoPointers != 0: // Elements do not contain pointers. // Allocate hchan and buf in one call. - c = (*hchan)(mallocgc(hchanSize+uintptr(size)*elem.size, nil, true)) + c = (*hchan)(mallocgc(hchanSize+mem, nil, true)) c.buf = add(unsafe.Pointer(c), hchanSize) default: // Elements contain pointers. c = new(hchan) - c.buf = mallocgc(uintptr(size)*elem.size, elem, true) + c.buf = mallocgc(mem, elem, true) } c.elemsize = uint16(elem.size) From 1e50dd02a98bce8901cf10634ee0b2c8bbe4da81 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Mon, 22 Oct 2018 20:47:54 +0200 Subject: [PATCH 229/240] runtime: use multiplication with overflow check for newarray MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This improves performance for e.g. maps with a bucket size (key+value*8 bytes) larger than 32 bytes and removes loading a value from the maxElems array for smaller bucket sizes. name old time/op new time/op delta MakeMap/[Byte]Byte 95.5ns ± 1% 94.7ns ± 1% -0.78% (p=0.013 n=9+9) MakeMap/[Int]Int 128ns ± 0% 121ns ± 2% -5.63% (p=0.000 n=6+10) Updates #21588 Change-Id: I7d9eb7d49150c399c15dcab675e24bc97ff97852 Reviewed-on: https://go-review.googlesource.com/c/143997 Reviewed-by: Keith Randall --- src/runtime/malloc.go | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/src/runtime/malloc.go b/src/runtime/malloc.go index dad4773cb8..12fa744052 100644 --- a/src/runtime/malloc.go +++ b/src/runtime/malloc.go @@ -106,6 +106,7 @@ package runtime import ( "runtime/internal/atomic" + "runtime/internal/math" "runtime/internal/sys" "unsafe" ) @@ -1040,10 +1041,11 @@ func newarray(typ *_type, n int) unsafe.Pointer { if n == 1 { return mallocgc(typ.size, typ, true) } - if n < 0 || uintptr(n) > maxSliceCap(typ.size) { + mem, overflow := math.MulUintptr(typ.size, uintptr(n)) + if overflow || mem > maxAlloc || n < 0 { panic(plainError("runtime: allocation size out of range")) } - return mallocgc(typ.size*uintptr(n), typ, true) + return mallocgc(mem, typ, true) } //go:linkname reflect_unsafe_NewArray reflect.unsafe_NewArray From 642792350ccd148da7b3e8a0e4e69341b222ab34 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Tue, 23 Oct 2018 10:03:59 +0200 Subject: [PATCH 230/240] runtime: remove unused maxSliceCap function and maxElems array MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit All uses of these have been converted to use runtime/internal/math functions for overflow checking. Fixes #21588 Change-Id: I0ba57028e471803dc7d445e66d77a8f87edfdafb Reviewed-on: https://go-review.googlesource.com/c/144037 Run-TryBot: Martin Möhrmann TryBot-Result: Gobot Gobot Reviewed-by: Keith Randall --- src/cmd/compile/internal/gc/inl_test.go | 1 - src/runtime/slice.go | 22 ---------------------- 2 files changed, 23 deletions(-) diff --git a/src/cmd/compile/internal/gc/inl_test.go b/src/cmd/compile/internal/gc/inl_test.go index 2f15cc3828..ac86cda2b8 100644 --- a/src/cmd/compile/internal/gc/inl_test.go +++ b/src/cmd/compile/internal/gc/inl_test.go @@ -54,7 +54,6 @@ func TestIntendedInlining(t *testing.T) { "getm", "isDirectIface", "itabHashFunc", - "maxSliceCap", "noescape", "readUnaligned32", "readUnaligned64", diff --git a/src/runtime/slice.go b/src/runtime/slice.go index 095ddc5bbd..9a081043b0 100644 --- a/src/runtime/slice.go +++ b/src/runtime/slice.go @@ -23,28 +23,6 @@ type notInHeapSlice struct { cap int } -// maxElems is a lookup table containing the maximum capacity for a slice. -// The index is the size of the slice element. -var maxElems = [...]uintptr{ - ^uintptr(0), - maxAlloc / 1, maxAlloc / 2, maxAlloc / 3, maxAlloc / 4, - maxAlloc / 5, maxAlloc / 6, maxAlloc / 7, maxAlloc / 8, - maxAlloc / 9, maxAlloc / 10, maxAlloc / 11, maxAlloc / 12, - maxAlloc / 13, maxAlloc / 14, maxAlloc / 15, maxAlloc / 16, - maxAlloc / 17, maxAlloc / 18, maxAlloc / 19, maxAlloc / 20, - maxAlloc / 21, maxAlloc / 22, maxAlloc / 23, maxAlloc / 24, - maxAlloc / 25, maxAlloc / 26, maxAlloc / 27, maxAlloc / 28, - maxAlloc / 29, maxAlloc / 30, maxAlloc / 31, maxAlloc / 32, -} - -// maxSliceCap returns the maximum capacity for a slice. -func maxSliceCap(elemsize uintptr) uintptr { - if elemsize < uintptr(len(maxElems)) { - return maxElems[elemsize] - } - return maxAlloc / elemsize -} - func panicmakeslicelen() { panic(errorString("makeslice: len out of range")) } From 5dbc67a99a99011fce1c1b7c983d2aa35247b950 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Sun, 21 Jan 2018 12:53:53 +0100 Subject: [PATCH 231/240] cmd/compile: avoid appends and allocate full slice length in copyRet MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit passes toolstash -cmp compilebench allocs: name old allocs/op new allocs/op delta Template 385k ± 0% 385k ± 0% -0.00% (p=0.017 n=19+20) Unicode 342k ± 0% 342k ± 0% ~ (p=0.867 n=20+20) GoTypes 1.15M ± 0% 1.15M ± 0% -0.00% (p=0.008 n=20+20) SSA 12.1M ± 0% 12.1M ± 0% ~ (p=0.141 n=20+19) Flate 234k ± 0% 234k ± 0% ~ (p=0.125 n=20+19) GoParser 315k ± 0% 315k ± 0% ~ (p=0.104 n=20+20) Reflect 972k ± 0% 972k ± 0% -0.00% (p=0.000 n=17+20) Tar 391k ± 0% 391k ± 0% -0.01% (p=0.000 n=19+20) XML 404k ± 0% 403k ± 0% -0.01% (p=0.000 n=20+19) Change-Id: Ie24f7fae7b6b85422ec1ff0240f08f0a34064d72 Reviewed-on: https://go-review.googlesource.com/c/144038 Run-TryBot: Martin Möhrmann TryBot-Result: Gobot Gobot Reviewed-by: Brad Fitzpatrick --- src/cmd/compile/internal/gc/order.go | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/src/cmd/compile/internal/gc/order.go b/src/cmd/compile/internal/gc/order.go index 3d0fa6ceb2..da2b3343a1 100644 --- a/src/cmd/compile/internal/gc/order.go +++ b/src/cmd/compile/internal/gc/order.go @@ -406,11 +406,13 @@ func (o *Order) copyRet(n *Node) []*Node { Fatalf("copyret %v %d", n.Type, n.Left.Type.NumResults()) } - var l1, l2 []*Node - for _, f := range n.Type.Fields().Slice() { - tmp := temp(f.Type) - l1 = append(l1, tmp) - l2 = append(l2, tmp) + slice := n.Type.Fields().Slice() + l1 := make([]*Node, len(slice)) + l2 := make([]*Node, len(slice)) + for i, t := range slice { + tmp := temp(t.Type) + l1[i] = tmp + l2[i] = tmp } as := nod(OAS2, nil, nil) From 5c472132bf88cc04c85ad5f848d8a2f77f21b228 Mon Sep 17 00:00:00 2001 From: Carlos Eduardo Seo Date: Mon, 6 Aug 2018 15:36:16 -0500 Subject: [PATCH 232/240] cmd/compile, runtime: add new lightweight atomics for ppc64x This change creates the infrastructure for new lightweight atomics primitives in runtime/internal/atomic: - LoadAcq, for load-acquire - StoreRel, for store-release - CasRel, for Compare-and-Swap-release and implements them for ppc64x. There is visible performance improvement in producer-consumer scenarios, like BenchmarkChanProdCons*: benchmark old ns/op new ns/op delta BenchmarkChanProdCons0-48 2034 2034 +0.00% BenchmarkChanProdCons10-48 1798 1608 -10.57% BenchmarkChanProdCons100-48 1596 1585 -0.69% BenchmarkChanProdConsWork0-48 2084 2046 -1.82% BenchmarkChanProdConsWork10-48 1829 1668 -8.80% BenchmarkChanProdConsWork100-48 1650 1650 +0.00% Fixes #21348 Change-Id: I1f6ce377e4a0fe4bd7f5f775e8036f50070ad8db Reviewed-on: https://go-review.googlesource.com/c/142277 Run-TryBot: Lynn Boger TryBot-Result: Gobot Gobot Reviewed-by: David Chase --- src/cmd/compile/internal/gc/ssa.go | 27 +++++++ src/cmd/compile/internal/ppc64/ssa.go | 33 +++++--- src/cmd/compile/internal/ssa/gen/PPC64.rules | 9 ++- src/cmd/compile/internal/ssa/gen/PPC64Ops.go | 14 ++-- .../compile/internal/ssa/gen/genericOps.go | 31 ++++---- src/cmd/compile/internal/ssa/opGen.go | 27 +++++++ src/cmd/compile/internal/ssa/rewritePPC64.go | 78 +++++++++++++++++-- src/runtime/internal/atomic/asm_386.s | 6 ++ src/runtime/internal/atomic/asm_amd64.s | 6 ++ src/runtime/internal/atomic/asm_amd64p32.s | 6 ++ src/runtime/internal/atomic/asm_arm.s | 9 +++ src/runtime/internal/atomic/asm_arm64.s | 3 + src/runtime/internal/atomic/asm_mips64x.s | 6 ++ src/runtime/internal/atomic/asm_mipsx.s | 6 ++ src/runtime/internal/atomic/asm_ppc64x.s | 25 ++++++ src/runtime/internal/atomic/asm_s390x.s | 4 + src/runtime/internal/atomic/atomic_386.go | 12 +++ src/runtime/internal/atomic/atomic_amd64x.go | 12 +++ src/runtime/internal/atomic/atomic_arm.go | 9 +++ src/runtime/internal/atomic/atomic_arm64.go | 9 +++ src/runtime/internal/atomic/atomic_arm64.s | 7 ++ src/runtime/internal/atomic/atomic_mips64x.go | 9 +++ src/runtime/internal/atomic/atomic_mips64x.s | 4 + src/runtime/internal/atomic/atomic_mipsx.go | 9 +++ src/runtime/internal/atomic/atomic_ppc64x.go | 9 +++ src/runtime/internal/atomic/atomic_ppc64x.s | 9 +++ src/runtime/internal/atomic/atomic_s390x.go | 15 ++++ src/runtime/internal/atomic/atomic_wasm.go | 22 ++++++ src/runtime/proc.go | 20 ++--- 29 files changed, 386 insertions(+), 50 deletions(-) diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go index 2ce59097af..303658a3e1 100644 --- a/src/cmd/compile/internal/gc/ssa.go +++ b/src/cmd/compile/internal/gc/ssa.go @@ -2862,6 +2862,7 @@ func init() { var all []*sys.Arch var p4 []*sys.Arch var p8 []*sys.Arch + var lwatomics []*sys.Arch for _, a := range sys.Archs { all = append(all, a) if a.PtrSize == 4 { @@ -2869,6 +2870,9 @@ func init() { } else { p8 = append(p8, a) } + if a.Family != sys.PPC64 { + lwatomics = append(lwatomics, a) + } } // add adds the intrinsic b for pkg.fn for the given list of architectures. @@ -2985,6 +2989,13 @@ func init() { return s.newValue1(ssa.OpSelect0, types.Types[TUINT64], v) }, sys.AMD64, sys.ARM64, sys.S390X, sys.MIPS64, sys.PPC64) + addF("runtime/internal/atomic", "LoadAcq", + func(s *state, n *Node, args []*ssa.Value) *ssa.Value { + v := s.newValue2(ssa.OpAtomicLoadAcq32, types.NewTuple(types.Types[TUINT32], types.TypeMem), args[0], s.mem()) + s.vars[&memVar] = s.newValue1(ssa.OpSelect1, types.TypeMem, v) + return s.newValue1(ssa.OpSelect0, types.Types[TUINT32], v) + }, + sys.PPC64) addF("runtime/internal/atomic", "Loadp", func(s *state, n *Node, args []*ssa.Value) *ssa.Value { v := s.newValue2(ssa.OpAtomicLoadPtr, types.NewTuple(s.f.Config.Types.BytePtr, types.TypeMem), args[0], s.mem()) @@ -3011,6 +3022,12 @@ func init() { return nil }, sys.AMD64, sys.ARM64, sys.S390X, sys.MIPS, sys.MIPS64) + addF("runtime/internal/atomic", "StoreRel", + func(s *state, n *Node, args []*ssa.Value) *ssa.Value { + s.vars[&memVar] = s.newValue3(ssa.OpAtomicStoreRel32, types.TypeMem, args[0], args[1], s.mem()) + return nil + }, + sys.PPC64) addF("runtime/internal/atomic", "Xchg", func(s *state, n *Node, args []*ssa.Value) *ssa.Value { @@ -3098,6 +3115,13 @@ func init() { return s.newValue1(ssa.OpSelect0, types.Types[TBOOL], v) }, sys.AMD64, sys.ARM64, sys.S390X, sys.MIPS64, sys.PPC64) + addF("runtime/internal/atomic", "CasRel", + func(s *state, n *Node, args []*ssa.Value) *ssa.Value { + v := s.newValue4(ssa.OpAtomicCompareAndSwap32, types.NewTuple(types.Types[TBOOL], types.TypeMem), args[0], args[1], args[2], s.mem()) + s.vars[&memVar] = s.newValue1(ssa.OpSelect1, types.TypeMem, v) + return s.newValue1(ssa.OpSelect0, types.Types[TBOOL], v) + }, + sys.PPC64) addF("runtime/internal/atomic", "And8", func(s *state, n *Node, args []*ssa.Value) *ssa.Value { @@ -3118,8 +3142,10 @@ func init() { alias("runtime/internal/atomic", "Loaduint", "runtime/internal/atomic", "Load64", p8...) alias("runtime/internal/atomic", "Loaduintptr", "runtime/internal/atomic", "Load", p4...) alias("runtime/internal/atomic", "Loaduintptr", "runtime/internal/atomic", "Load64", p8...) + alias("runtime/internal/atomic", "LoadAcq", "runtime/internal/atomic", "Load", lwatomics...) alias("runtime/internal/atomic", "Storeuintptr", "runtime/internal/atomic", "Store", p4...) alias("runtime/internal/atomic", "Storeuintptr", "runtime/internal/atomic", "Store64", p8...) + alias("runtime/internal/atomic", "StoreRel", "runtime/internal/atomic", "Store", lwatomics...) alias("runtime/internal/atomic", "Xchguintptr", "runtime/internal/atomic", "Xchg", p4...) alias("runtime/internal/atomic", "Xchguintptr", "runtime/internal/atomic", "Xchg64", p8...) alias("runtime/internal/atomic", "Xadduintptr", "runtime/internal/atomic", "Xadd", p4...) @@ -3128,6 +3154,7 @@ func init() { alias("runtime/internal/atomic", "Casuintptr", "runtime/internal/atomic", "Cas64", p8...) alias("runtime/internal/atomic", "Casp1", "runtime/internal/atomic", "Cas", p4...) alias("runtime/internal/atomic", "Casp1", "runtime/internal/atomic", "Cas64", p8...) + alias("runtime/internal/atomic", "CasRel", "runtime/internal/atomic", "Cas", lwatomics...) alias("runtime/internal/sys", "Ctz8", "math/bits", "TrailingZeros8", all...) diff --git a/src/cmd/compile/internal/ppc64/ssa.go b/src/cmd/compile/internal/ppc64/ssa.go index bd6ffbce53..a3f8b67177 100644 --- a/src/cmd/compile/internal/ppc64/ssa.go +++ b/src/cmd/compile/internal/ppc64/ssa.go @@ -313,9 +313,11 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { } arg0 := v.Args[0].Reg() out := v.Reg0() - // SYNC - psync := s.Prog(ppc64.ASYNC) - psync.To.Type = obj.TYPE_NONE + // SYNC when AuxInt == 1; otherwise, load-acquire + if v.AuxInt == 1 { + psync := s.Prog(ppc64.ASYNC) + psync.To.Type = obj.TYPE_NONE + } // Load p := s.Prog(ld) p.From.Type = obj.TYPE_MEM @@ -338,7 +340,7 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { case ssa.OpPPC64LoweredAtomicStore32, ssa.OpPPC64LoweredAtomicStore64: - // SYNC + // SYNC or LWSYNC // MOVD/MOVW arg1,(arg0) st := ppc64.AMOVD if v.Op == ssa.OpPPC64LoweredAtomicStore32 { @@ -346,8 +348,13 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { } arg0 := v.Args[0].Reg() arg1 := v.Args[1].Reg() + // If AuxInt == 0, LWSYNC (Store-Release), else SYNC // SYNC - psync := s.Prog(ppc64.ASYNC) + syncOp := ppc64.ASYNC + if v.AuxInt == 0 { + syncOp = ppc64.ALWSYNC + } + psync := s.Prog(syncOp) psync.To.Type = obj.TYPE_NONE // Store p := s.Prog(st) @@ -360,12 +367,12 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { ssa.OpPPC64LoweredAtomicCas32: // LWSYNC // loop: - // LDAR (Rarg0), Rtmp + // LDAR (Rarg0), MutexHint, Rtmp // CMP Rarg1, Rtmp // BNE fail // STDCCC Rarg2, (Rarg0) // BNE loop - // LWSYNC + // LWSYNC // Only for sequential consistency; not required in CasRel. // MOVD $1, Rout // BR end // fail: @@ -393,6 +400,11 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { p.From.Reg = r0 p.To.Type = obj.TYPE_REG p.To.Reg = ppc64.REGTMP + // If it is a Compare-and-Swap-Release operation, set the EH field with + // the release hint. + if v.AuxInt == 0 { + p.SetFrom3(obj.Addr{Type: obj.TYPE_CONST, Offset: 0}) + } // CMP reg1,reg2 p1 := s.Prog(cmp) p1.From.Type = obj.TYPE_REG @@ -414,8 +426,11 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { gc.Patch(p4, p) // LWSYNC - Assuming shared data not write-through-required nor // caching-inhibited. See Appendix B.2.1.1 in the ISA 2.07b. - plwsync2 := s.Prog(ppc64.ALWSYNC) - plwsync2.To.Type = obj.TYPE_NONE + // If the operation is a CAS-Release, then synchronization is not necessary. + if v.AuxInt != 0 { + plwsync2 := s.Prog(ppc64.ALWSYNC) + plwsync2.To.Type = obj.TYPE_NONE + } // return true p5 := s.Prog(ppc64.AMOVD) p5.From.Type = obj.TYPE_CONST diff --git a/src/cmd/compile/internal/ssa/gen/PPC64.rules b/src/cmd/compile/internal/ssa/gen/PPC64.rules index be1bd6de0b..0eaa88596b 100644 --- a/src/cmd/compile/internal/ssa/gen/PPC64.rules +++ b/src/cmd/compile/internal/ssa/gen/PPC64.rules @@ -896,16 +896,19 @@ (MOVBstorezero [off1+off2] {mergeSym(sym1,sym2)} x mem) // atomic intrinsics -(AtomicLoad(32|64|Ptr) ptr mem) -> (LoweredAtomicLoad(32|64|Ptr) ptr mem) +(AtomicLoad(32|64|Ptr) ptr mem) -> (LoweredAtomicLoad(32|64|Ptr) [1] ptr mem) +(AtomicLoadAcq32 ptr mem) -> (LoweredAtomicLoad32 [0] ptr mem) -(AtomicStore(32|64) ptr val mem) -> (LoweredAtomicStore(32|64) ptr val mem) +(AtomicStore(32|64) ptr val mem) -> (LoweredAtomicStore(32|64) [1] ptr val mem) +(AtomicStoreRel32 ptr val mem) -> (LoweredAtomicStore32 [0] ptr val mem) //(AtomicStorePtrNoWB ptr val mem) -> (STLR ptr val mem) (AtomicExchange(32|64) ptr val mem) -> (LoweredAtomicExchange(32|64) ptr val mem) (AtomicAdd(32|64) ptr val mem) -> (LoweredAtomicAdd(32|64) ptr val mem) -(AtomicCompareAndSwap(32|64) ptr old new_ mem) -> (LoweredAtomicCas(32|64) ptr old new_ mem) +(AtomicCompareAndSwap(32|64) ptr old new_ mem) -> (LoweredAtomicCas(32|64) [1] ptr old new_ mem) +(AtomicCompareAndSwapRel32 ptr old new_ mem) -> (LoweredAtomicCas32 [0] ptr old new_ mem) (AtomicAnd8 ptr val mem) -> (LoweredAtomicAnd8 ptr val mem) (AtomicOr8 ptr val mem) -> (LoweredAtomicOr8 ptr val mem) diff --git a/src/cmd/compile/internal/ssa/gen/PPC64Ops.go b/src/cmd/compile/internal/ssa/gen/PPC64Ops.go index c82f7312fe..ef0db69fb7 100644 --- a/src/cmd/compile/internal/ssa/gen/PPC64Ops.go +++ b/src/cmd/compile/internal/ssa/gen/PPC64Ops.go @@ -470,12 +470,12 @@ func init() { faultOnNilArg1: true, }, - {name: "LoweredAtomicStore32", argLength: 3, reg: gpstore, typ: "Mem", faultOnNilArg0: true, hasSideEffects: true}, - {name: "LoweredAtomicStore64", argLength: 3, reg: gpstore, typ: "Mem", faultOnNilArg0: true, hasSideEffects: true}, + {name: "LoweredAtomicStore32", argLength: 3, reg: gpstore, typ: "Mem", aux: "Int64", faultOnNilArg0: true, hasSideEffects: true}, + {name: "LoweredAtomicStore64", argLength: 3, reg: gpstore, typ: "Mem", aux: "Int64", faultOnNilArg0: true, hasSideEffects: true}, - {name: "LoweredAtomicLoad32", argLength: 2, reg: gpload, typ: "UInt32", clobberFlags: true, faultOnNilArg0: true}, - {name: "LoweredAtomicLoad64", argLength: 2, reg: gpload, typ: "Int64", clobberFlags: true, faultOnNilArg0: true}, - {name: "LoweredAtomicLoadPtr", argLength: 2, reg: gpload, typ: "Int64", clobberFlags: true, faultOnNilArg0: true}, + {name: "LoweredAtomicLoad32", argLength: 2, reg: gpload, typ: "UInt32", aux: "Int64", clobberFlags: true, faultOnNilArg0: true}, + {name: "LoweredAtomicLoad64", argLength: 2, reg: gpload, typ: "Int64", aux: "Int64", clobberFlags: true, faultOnNilArg0: true}, + {name: "LoweredAtomicLoadPtr", argLength: 2, reg: gpload, typ: "Int64", aux: "Int64", clobberFlags: true, faultOnNilArg0: true}, // atomic add32, 64 // SYNC @@ -516,8 +516,8 @@ func init() { // BNE -4(PC) // CBNZ Rtmp, -4(PC) // CSET EQ, Rout - {name: "LoweredAtomicCas64", argLength: 4, reg: gpcas, resultNotInArgs: true, clobberFlags: true, faultOnNilArg0: true, hasSideEffects: true}, - {name: "LoweredAtomicCas32", argLength: 4, reg: gpcas, resultNotInArgs: true, clobberFlags: true, faultOnNilArg0: true, hasSideEffects: true}, + {name: "LoweredAtomicCas64", argLength: 4, reg: gpcas, resultNotInArgs: true, aux: "Int64", clobberFlags: true, faultOnNilArg0: true, hasSideEffects: true}, + {name: "LoweredAtomicCas32", argLength: 4, reg: gpcas, resultNotInArgs: true, aux: "Int64", clobberFlags: true, faultOnNilArg0: true, hasSideEffects: true}, // atomic 8 and/or. // *arg0 &= (|=) arg1. arg2=mem. returns memory. auxint must be zero. diff --git a/src/cmd/compile/internal/ssa/gen/genericOps.go b/src/cmd/compile/internal/ssa/gen/genericOps.go index 2f28ed45d0..7ff6da1b01 100644 --- a/src/cmd/compile/internal/ssa/gen/genericOps.go +++ b/src/cmd/compile/internal/ssa/gen/genericOps.go @@ -512,20 +512,23 @@ var genericOps = []opData{ // Atomic loads return a new memory so that the loads are properly ordered // with respect to other loads and stores. // TODO: use for sync/atomic at some point. - {name: "AtomicLoad32", argLength: 2, typ: "(UInt32,Mem)"}, // Load from arg0. arg1=memory. Returns loaded value and new memory. - {name: "AtomicLoad64", argLength: 2, typ: "(UInt64,Mem)"}, // Load from arg0. arg1=memory. Returns loaded value and new memory. - {name: "AtomicLoadPtr", argLength: 2, typ: "(BytePtr,Mem)"}, // Load from arg0. arg1=memory. Returns loaded value and new memory. - {name: "AtomicStore32", argLength: 3, typ: "Mem", hasSideEffects: true}, // Store arg1 to *arg0. arg2=memory. Returns memory. - {name: "AtomicStore64", argLength: 3, typ: "Mem", hasSideEffects: true}, // Store arg1 to *arg0. arg2=memory. Returns memory. - {name: "AtomicStorePtrNoWB", argLength: 3, typ: "Mem", hasSideEffects: true}, // Store arg1 to *arg0. arg2=memory. Returns memory. - {name: "AtomicExchange32", argLength: 3, typ: "(UInt32,Mem)", hasSideEffects: true}, // Store arg1 to *arg0. arg2=memory. Returns old contents of *arg0 and new memory. - {name: "AtomicExchange64", argLength: 3, typ: "(UInt64,Mem)", hasSideEffects: true}, // Store arg1 to *arg0. arg2=memory. Returns old contents of *arg0 and new memory. - {name: "AtomicAdd32", argLength: 3, typ: "(UInt32,Mem)", hasSideEffects: true}, // Do *arg0 += arg1. arg2=memory. Returns sum and new memory. - {name: "AtomicAdd64", argLength: 3, typ: "(UInt64,Mem)", hasSideEffects: true}, // Do *arg0 += arg1. arg2=memory. Returns sum and new memory. - {name: "AtomicCompareAndSwap32", argLength: 4, typ: "(Bool,Mem)", hasSideEffects: true}, // if *arg0==arg1, then set *arg0=arg2. Returns true iff store happens and new memory. - {name: "AtomicCompareAndSwap64", argLength: 4, typ: "(Bool,Mem)", hasSideEffects: true}, // if *arg0==arg1, then set *arg0=arg2. Returns true iff store happens and new memory. - {name: "AtomicAnd8", argLength: 3, typ: "Mem", hasSideEffects: true}, // *arg0 &= arg1. arg2=memory. Returns memory. - {name: "AtomicOr8", argLength: 3, typ: "Mem", hasSideEffects: true}, // *arg0 |= arg1. arg2=memory. Returns memory. + {name: "AtomicLoad32", argLength: 2, typ: "(UInt32,Mem)"}, // Load from arg0. arg1=memory. Returns loaded value and new memory. + {name: "AtomicLoad64", argLength: 2, typ: "(UInt64,Mem)"}, // Load from arg0. arg1=memory. Returns loaded value and new memory. + {name: "AtomicLoadPtr", argLength: 2, typ: "(BytePtr,Mem)"}, // Load from arg0. arg1=memory. Returns loaded value and new memory. + {name: "AtomicLoadAcq32", argLength: 2, typ: "(UInt32,Mem)"}, // Load from arg0. arg1=memory. Lock acquisition, returns loaded value and new memory. + {name: "AtomicStore32", argLength: 3, typ: "Mem", hasSideEffects: true}, // Store arg1 to *arg0. arg2=memory. Returns memory. + {name: "AtomicStore64", argLength: 3, typ: "Mem", hasSideEffects: true}, // Store arg1 to *arg0. arg2=memory. Returns memory. + {name: "AtomicStorePtrNoWB", argLength: 3, typ: "Mem", hasSideEffects: true}, // Store arg1 to *arg0. arg2=memory. Returns memory. + {name: "AtomicStoreRel32", argLength: 3, typ: "Mem", hasSideEffects: true}, // Store arg1 to *arg0. arg2=memory. Lock release, returns memory. + {name: "AtomicExchange32", argLength: 3, typ: "(UInt32,Mem)", hasSideEffects: true}, // Store arg1 to *arg0. arg2=memory. Returns old contents of *arg0 and new memory. + {name: "AtomicExchange64", argLength: 3, typ: "(UInt64,Mem)", hasSideEffects: true}, // Store arg1 to *arg0. arg2=memory. Returns old contents of *arg0 and new memory. + {name: "AtomicAdd32", argLength: 3, typ: "(UInt32,Mem)", hasSideEffects: true}, // Do *arg0 += arg1. arg2=memory. Returns sum and new memory. + {name: "AtomicAdd64", argLength: 3, typ: "(UInt64,Mem)", hasSideEffects: true}, // Do *arg0 += arg1. arg2=memory. Returns sum and new memory. + {name: "AtomicCompareAndSwap32", argLength: 4, typ: "(Bool,Mem)", hasSideEffects: true}, // if *arg0==arg1, then set *arg0=arg2. Returns true if store happens and new memory. + {name: "AtomicCompareAndSwap64", argLength: 4, typ: "(Bool,Mem)", hasSideEffects: true}, // if *arg0==arg1, then set *arg0=arg2. Returns true if store happens and new memory. + {name: "AtomicCompareAndSwapRel32", argLength: 4, typ: "(Bool,Mem)", hasSideEffects: true}, // if *arg0==arg1, then set *arg0=arg2. Lock release, returns true if store happens and new memory. + {name: "AtomicAnd8", argLength: 3, typ: "Mem", hasSideEffects: true}, // *arg0 &= arg1. arg2=memory. Returns memory. + {name: "AtomicOr8", argLength: 3, typ: "Mem", hasSideEffects: true}, // *arg0 |= arg1. arg2=memory. Returns memory. // Atomic operation variants // These variants have the same semantics as above atomic operations. diff --git a/src/cmd/compile/internal/ssa/opGen.go b/src/cmd/compile/internal/ssa/opGen.go index ad6c151d1d..1435caf26a 100644 --- a/src/cmd/compile/internal/ssa/opGen.go +++ b/src/cmd/compile/internal/ssa/opGen.go @@ -2409,15 +2409,18 @@ const ( OpAtomicLoad32 OpAtomicLoad64 OpAtomicLoadPtr + OpAtomicLoadAcq32 OpAtomicStore32 OpAtomicStore64 OpAtomicStorePtrNoWB + OpAtomicStoreRel32 OpAtomicExchange32 OpAtomicExchange64 OpAtomicAdd32 OpAtomicAdd64 OpAtomicCompareAndSwap32 OpAtomicCompareAndSwap64 + OpAtomicCompareAndSwapRel32 OpAtomicAnd8 OpAtomicOr8 OpAtomicAdd32Variant @@ -23449,6 +23452,7 @@ var opcodeTable = [...]opInfo{ }, { name: "LoweredAtomicStore32", + auxType: auxInt64, argLen: 3, faultOnNilArg0: true, hasSideEffects: true, @@ -23461,6 +23465,7 @@ var opcodeTable = [...]opInfo{ }, { name: "LoweredAtomicStore64", + auxType: auxInt64, argLen: 3, faultOnNilArg0: true, hasSideEffects: true, @@ -23473,6 +23478,7 @@ var opcodeTable = [...]opInfo{ }, { name: "LoweredAtomicLoad32", + auxType: auxInt64, argLen: 2, clobberFlags: true, faultOnNilArg0: true, @@ -23487,6 +23493,7 @@ var opcodeTable = [...]opInfo{ }, { name: "LoweredAtomicLoad64", + auxType: auxInt64, argLen: 2, clobberFlags: true, faultOnNilArg0: true, @@ -23501,6 +23508,7 @@ var opcodeTable = [...]opInfo{ }, { name: "LoweredAtomicLoadPtr", + auxType: auxInt64, argLen: 2, clobberFlags: true, faultOnNilArg0: true, @@ -23583,6 +23591,7 @@ var opcodeTable = [...]opInfo{ }, { name: "LoweredAtomicCas64", + auxType: auxInt64, argLen: 4, resultNotInArgs: true, clobberFlags: true, @@ -23601,6 +23610,7 @@ var opcodeTable = [...]opInfo{ }, { name: "LoweredAtomicCas32", + auxType: auxInt64, argLen: 4, resultNotInArgs: true, clobberFlags: true, @@ -29701,6 +29711,11 @@ var opcodeTable = [...]opInfo{ argLen: 2, generic: true, }, + { + name: "AtomicLoadAcq32", + argLen: 2, + generic: true, + }, { name: "AtomicStore32", argLen: 3, @@ -29719,6 +29734,12 @@ var opcodeTable = [...]opInfo{ hasSideEffects: true, generic: true, }, + { + name: "AtomicStoreRel32", + argLen: 3, + hasSideEffects: true, + generic: true, + }, { name: "AtomicExchange32", argLen: 3, @@ -29755,6 +29776,12 @@ var opcodeTable = [...]opInfo{ hasSideEffects: true, generic: true, }, + { + name: "AtomicCompareAndSwapRel32", + argLen: 4, + hasSideEffects: true, + generic: true, + }, { name: "AtomicAnd8", argLen: 3, diff --git a/src/cmd/compile/internal/ssa/rewritePPC64.go b/src/cmd/compile/internal/ssa/rewritePPC64.go index 8f100c1a38..dad036d3d2 100644 --- a/src/cmd/compile/internal/ssa/rewritePPC64.go +++ b/src/cmd/compile/internal/ssa/rewritePPC64.go @@ -53,6 +53,8 @@ func rewriteValuePPC64(v *Value) bool { return rewriteValuePPC64_OpAtomicCompareAndSwap32_0(v) case OpAtomicCompareAndSwap64: return rewriteValuePPC64_OpAtomicCompareAndSwap64_0(v) + case OpAtomicCompareAndSwapRel32: + return rewriteValuePPC64_OpAtomicCompareAndSwapRel32_0(v) case OpAtomicExchange32: return rewriteValuePPC64_OpAtomicExchange32_0(v) case OpAtomicExchange64: @@ -61,6 +63,8 @@ func rewriteValuePPC64(v *Value) bool { return rewriteValuePPC64_OpAtomicLoad32_0(v) case OpAtomicLoad64: return rewriteValuePPC64_OpAtomicLoad64_0(v) + case OpAtomicLoadAcq32: + return rewriteValuePPC64_OpAtomicLoadAcq32_0(v) case OpAtomicLoadPtr: return rewriteValuePPC64_OpAtomicLoadPtr_0(v) case OpAtomicOr8: @@ -69,6 +73,8 @@ func rewriteValuePPC64(v *Value) bool { return rewriteValuePPC64_OpAtomicStore32_0(v) case OpAtomicStore64: return rewriteValuePPC64_OpAtomicStore64_0(v) + case OpAtomicStoreRel32: + return rewriteValuePPC64_OpAtomicStoreRel32_0(v) case OpAvg64u: return rewriteValuePPC64_OpAvg64u_0(v) case OpBitLen32: @@ -931,7 +937,7 @@ func rewriteValuePPC64_OpAtomicAnd8_0(v *Value) bool { func rewriteValuePPC64_OpAtomicCompareAndSwap32_0(v *Value) bool { // match: (AtomicCompareAndSwap32 ptr old new_ mem) // cond: - // result: (LoweredAtomicCas32 ptr old new_ mem) + // result: (LoweredAtomicCas32 [1] ptr old new_ mem) for { _ = v.Args[3] ptr := v.Args[0] @@ -939,6 +945,7 @@ func rewriteValuePPC64_OpAtomicCompareAndSwap32_0(v *Value) bool { new_ := v.Args[2] mem := v.Args[3] v.reset(OpPPC64LoweredAtomicCas32) + v.AuxInt = 1 v.AddArg(ptr) v.AddArg(old) v.AddArg(new_) @@ -949,7 +956,7 @@ func rewriteValuePPC64_OpAtomicCompareAndSwap32_0(v *Value) bool { func rewriteValuePPC64_OpAtomicCompareAndSwap64_0(v *Value) bool { // match: (AtomicCompareAndSwap64 ptr old new_ mem) // cond: - // result: (LoweredAtomicCas64 ptr old new_ mem) + // result: (LoweredAtomicCas64 [1] ptr old new_ mem) for { _ = v.Args[3] ptr := v.Args[0] @@ -957,6 +964,26 @@ func rewriteValuePPC64_OpAtomicCompareAndSwap64_0(v *Value) bool { new_ := v.Args[2] mem := v.Args[3] v.reset(OpPPC64LoweredAtomicCas64) + v.AuxInt = 1 + v.AddArg(ptr) + v.AddArg(old) + v.AddArg(new_) + v.AddArg(mem) + return true + } +} +func rewriteValuePPC64_OpAtomicCompareAndSwapRel32_0(v *Value) bool { + // match: (AtomicCompareAndSwapRel32 ptr old new_ mem) + // cond: + // result: (LoweredAtomicCas32 [0] ptr old new_ mem) + for { + _ = v.Args[3] + ptr := v.Args[0] + old := v.Args[1] + new_ := v.Args[2] + mem := v.Args[3] + v.reset(OpPPC64LoweredAtomicCas32) + v.AuxInt = 0 v.AddArg(ptr) v.AddArg(old) v.AddArg(new_) @@ -999,12 +1026,13 @@ func rewriteValuePPC64_OpAtomicExchange64_0(v *Value) bool { func rewriteValuePPC64_OpAtomicLoad32_0(v *Value) bool { // match: (AtomicLoad32 ptr mem) // cond: - // result: (LoweredAtomicLoad32 ptr mem) + // result: (LoweredAtomicLoad32 [1] ptr mem) for { _ = v.Args[1] ptr := v.Args[0] mem := v.Args[1] v.reset(OpPPC64LoweredAtomicLoad32) + v.AuxInt = 1 v.AddArg(ptr) v.AddArg(mem) return true @@ -1013,12 +1041,28 @@ func rewriteValuePPC64_OpAtomicLoad32_0(v *Value) bool { func rewriteValuePPC64_OpAtomicLoad64_0(v *Value) bool { // match: (AtomicLoad64 ptr mem) // cond: - // result: (LoweredAtomicLoad64 ptr mem) + // result: (LoweredAtomicLoad64 [1] ptr mem) for { _ = v.Args[1] ptr := v.Args[0] mem := v.Args[1] v.reset(OpPPC64LoweredAtomicLoad64) + v.AuxInt = 1 + v.AddArg(ptr) + v.AddArg(mem) + return true + } +} +func rewriteValuePPC64_OpAtomicLoadAcq32_0(v *Value) bool { + // match: (AtomicLoadAcq32 ptr mem) + // cond: + // result: (LoweredAtomicLoad32 [0] ptr mem) + for { + _ = v.Args[1] + ptr := v.Args[0] + mem := v.Args[1] + v.reset(OpPPC64LoweredAtomicLoad32) + v.AuxInt = 0 v.AddArg(ptr) v.AddArg(mem) return true @@ -1027,12 +1071,13 @@ func rewriteValuePPC64_OpAtomicLoad64_0(v *Value) bool { func rewriteValuePPC64_OpAtomicLoadPtr_0(v *Value) bool { // match: (AtomicLoadPtr ptr mem) // cond: - // result: (LoweredAtomicLoadPtr ptr mem) + // result: (LoweredAtomicLoadPtr [1] ptr mem) for { _ = v.Args[1] ptr := v.Args[0] mem := v.Args[1] v.reset(OpPPC64LoweredAtomicLoadPtr) + v.AuxInt = 1 v.AddArg(ptr) v.AddArg(mem) return true @@ -1057,13 +1102,14 @@ func rewriteValuePPC64_OpAtomicOr8_0(v *Value) bool { func rewriteValuePPC64_OpAtomicStore32_0(v *Value) bool { // match: (AtomicStore32 ptr val mem) // cond: - // result: (LoweredAtomicStore32 ptr val mem) + // result: (LoweredAtomicStore32 [1] ptr val mem) for { _ = v.Args[2] ptr := v.Args[0] val := v.Args[1] mem := v.Args[2] v.reset(OpPPC64LoweredAtomicStore32) + v.AuxInt = 1 v.AddArg(ptr) v.AddArg(val) v.AddArg(mem) @@ -1073,13 +1119,31 @@ func rewriteValuePPC64_OpAtomicStore32_0(v *Value) bool { func rewriteValuePPC64_OpAtomicStore64_0(v *Value) bool { // match: (AtomicStore64 ptr val mem) // cond: - // result: (LoweredAtomicStore64 ptr val mem) + // result: (LoweredAtomicStore64 [1] ptr val mem) for { _ = v.Args[2] ptr := v.Args[0] val := v.Args[1] mem := v.Args[2] v.reset(OpPPC64LoweredAtomicStore64) + v.AuxInt = 1 + v.AddArg(ptr) + v.AddArg(val) + v.AddArg(mem) + return true + } +} +func rewriteValuePPC64_OpAtomicStoreRel32_0(v *Value) bool { + // match: (AtomicStoreRel32 ptr val mem) + // cond: + // result: (LoweredAtomicStore32 [0] ptr val mem) + for { + _ = v.Args[2] + ptr := v.Args[0] + val := v.Args[1] + mem := v.Args[2] + v.reset(OpPPC64LoweredAtomicStore32) + v.AuxInt = 0 v.AddArg(ptr) v.AddArg(val) v.AddArg(mem) diff --git a/src/runtime/internal/atomic/asm_386.s b/src/runtime/internal/atomic/asm_386.s index 86a3ef33b9..13289a88d0 100644 --- a/src/runtime/internal/atomic/asm_386.s +++ b/src/runtime/internal/atomic/asm_386.s @@ -23,6 +23,9 @@ TEXT runtime∕internal∕atomic·Cas(SB), NOSPLIT, $0-13 TEXT runtime∕internal∕atomic·Casuintptr(SB), NOSPLIT, $0-13 JMP runtime∕internal∕atomic·Cas(SB) +TEXT runtime∕internal∕atomic·CasRel(SB), NOSPLIT, $0-13 + JMP runtime∕internal∕atomic·Cas(SB) + TEXT runtime∕internal∕atomic·Loaduintptr(SB), NOSPLIT, $0-8 JMP runtime∕internal∕atomic·Load(SB) @@ -180,6 +183,9 @@ TEXT runtime∕internal∕atomic·Store(SB), NOSPLIT, $0-8 XCHGL AX, 0(BX) RET +TEXT runtime∕internal∕atomic·StoreRel(SB), NOSPLIT, $0-8 + JMP runtime∕internal∕atomic·Store(SB) + // uint64 atomicload64(uint64 volatile* addr); TEXT runtime∕internal∕atomic·Load64(SB), NOSPLIT, $0-12 MOVL ptr+0(FP), AX diff --git a/src/runtime/internal/atomic/asm_amd64.s b/src/runtime/internal/atomic/asm_amd64.s index 6fb5211c9c..e18aee7d59 100644 --- a/src/runtime/internal/atomic/asm_amd64.s +++ b/src/runtime/internal/atomic/asm_amd64.s @@ -43,6 +43,9 @@ TEXT runtime∕internal∕atomic·Cas64(SB), NOSPLIT, $0-25 TEXT runtime∕internal∕atomic·Casuintptr(SB), NOSPLIT, $0-25 JMP runtime∕internal∕atomic·Cas64(SB) +TEXT runtime∕internal∕atomic·CasRel(SB), NOSPLIT, $0-17 + JMP runtime∕internal∕atomic·Cas(SB) + TEXT runtime∕internal∕atomic·Loaduintptr(SB), NOSPLIT, $0-16 JMP runtime∕internal∕atomic·Load64(SB) @@ -130,6 +133,9 @@ TEXT runtime∕internal∕atomic·Store(SB), NOSPLIT, $0-12 XCHGL AX, 0(BX) RET +TEXT runtime∕internal∕atomic·StoreRel(SB), NOSPLIT, $0-12 + JMP runtime∕internal∕atomic·Store(SB) + TEXT runtime∕internal∕atomic·Store64(SB), NOSPLIT, $0-16 MOVQ ptr+0(FP), BX MOVQ val+8(FP), AX diff --git a/src/runtime/internal/atomic/asm_amd64p32.s b/src/runtime/internal/atomic/asm_amd64p32.s index ff590e601b..35b5ef205e 100644 --- a/src/runtime/internal/atomic/asm_amd64p32.s +++ b/src/runtime/internal/atomic/asm_amd64p32.s @@ -23,6 +23,9 @@ TEXT runtime∕internal∕atomic·Cas(SB), NOSPLIT, $0-17 TEXT runtime∕internal∕atomic·Casuintptr(SB), NOSPLIT, $0-17 JMP runtime∕internal∕atomic·Cas(SB) +TEXT runtime∕internal∕atomic·CasRel(SB), NOSPLIT, $0-17 + JMP runtime∕internal∕atomic·Cas(SB) + TEXT runtime∕internal∕atomic·Loaduintptr(SB), NOSPLIT, $0-12 JMP runtime∕internal∕atomic·Load(SB) @@ -130,6 +133,9 @@ TEXT runtime∕internal∕atomic·Store(SB), NOSPLIT, $0-8 XCHGL AX, 0(BX) RET +TEXT runtime∕internal∕atomic·StoreRel(SB), NOSPLIT, $0-8 + JMP runtime∕internal∕atomic·Store(SB) + TEXT runtime∕internal∕atomic·Store64(SB), NOSPLIT, $0-16 MOVL ptr+0(FP), BX MOVQ val+8(FP), AX diff --git a/src/runtime/internal/atomic/asm_arm.s b/src/runtime/internal/atomic/asm_arm.s index 09724c1c34..d4ef11560e 100644 --- a/src/runtime/internal/atomic/asm_arm.s +++ b/src/runtime/internal/atomic/asm_arm.s @@ -53,12 +53,18 @@ casfail: TEXT runtime∕internal∕atomic·Loadp(SB),NOSPLIT|NOFRAME,$0-8 B runtime∕internal∕atomic·Load(SB) +TEXT runtime∕internal∕atomic·LoadAcq(SB),NOSPLIT|NOFRAME,$0-8 + B runtime∕internal∕atomic·Load(SB) + TEXT runtime∕internal∕atomic·Casuintptr(SB),NOSPLIT,$0-13 B runtime∕internal∕atomic·Cas(SB) TEXT runtime∕internal∕atomic·Casp1(SB),NOSPLIT,$0-13 B runtime∕internal∕atomic·Cas(SB) +TEXT runtime∕internal∕atomic·CasRel(SB),NOSPLIT,$0-13 + B runtime∕internal∕atomic·Cas(SB) + TEXT runtime∕internal∕atomic·Loaduintptr(SB),NOSPLIT,$0-8 B runtime∕internal∕atomic·Load(SB) @@ -71,6 +77,9 @@ TEXT runtime∕internal∕atomic·Storeuintptr(SB),NOSPLIT,$0-8 TEXT runtime∕internal∕atomic·StorepNoWB(SB),NOSPLIT,$0-8 B runtime∕internal∕atomic·Store(SB) +TEXT runtime∕internal∕atomic·StoreRel(SB),NOSPLIT,$0-8 + B runtime∕internal∕atomic·Store(SB) + TEXT runtime∕internal∕atomic·Xadduintptr(SB),NOSPLIT,$0-12 B runtime∕internal∕atomic·Xadd(SB) diff --git a/src/runtime/internal/atomic/asm_arm64.s b/src/runtime/internal/atomic/asm_arm64.s index 56b89a5a0b..8336a859ad 100644 --- a/src/runtime/internal/atomic/asm_arm64.s +++ b/src/runtime/internal/atomic/asm_arm64.s @@ -29,6 +29,9 @@ ok: TEXT runtime∕internal∕atomic·Casuintptr(SB), NOSPLIT, $0-25 B runtime∕internal∕atomic·Cas64(SB) +TEXT runtime∕internal∕atomic·CasRel(SB), NOSPLIT, $0-17 + B runtime∕internal∕atomic·Cas(SB) + TEXT runtime∕internal∕atomic·Loaduintptr(SB), NOSPLIT, $0-16 B runtime∕internal∕atomic·Load64(SB) diff --git a/src/runtime/internal/atomic/asm_mips64x.s b/src/runtime/internal/atomic/asm_mips64x.s index 19d131e5a6..9cb10371b7 100644 --- a/src/runtime/internal/atomic/asm_mips64x.s +++ b/src/runtime/internal/atomic/asm_mips64x.s @@ -62,6 +62,9 @@ cas64_fail: TEXT ·Casuintptr(SB), NOSPLIT, $0-25 JMP ·Cas64(SB) +TEXT ·CasRel(SB), NOSPLIT, $0-17 + JMP ·Cas(SB) + TEXT ·Loaduintptr(SB), NOSPLIT|NOFRAME, $0-16 JMP ·Load64(SB) @@ -152,6 +155,9 @@ TEXT ·Xchguintptr(SB), NOSPLIT, $0-24 TEXT ·StorepNoWB(SB), NOSPLIT, $0-16 JMP ·Store64(SB) +TEXT ·StoreRel(SB), NOSPLIT, $0-12 + JMP ·Store(SB) + TEXT ·Store(SB), NOSPLIT, $0-12 MOVV ptr+0(FP), R1 MOVW val+8(FP), R2 diff --git a/src/runtime/internal/atomic/asm_mipsx.s b/src/runtime/internal/atomic/asm_mipsx.s index 30550fd02e..73d7ea3ad4 100644 --- a/src/runtime/internal/atomic/asm_mipsx.s +++ b/src/runtime/internal/atomic/asm_mipsx.s @@ -70,6 +70,9 @@ try_xchg: TEXT ·Casuintptr(SB),NOSPLIT,$0-13 JMP ·Cas(SB) +TEXT ·CasRel(SB),NOSPLIT,$0-13 + JMP ·Cas(SB) + TEXT ·Loaduintptr(SB),NOSPLIT,$0-8 JMP ·Load(SB) @@ -100,6 +103,9 @@ TEXT ·Xchguintptr(SB),NOSPLIT,$0-12 TEXT ·StorepNoWB(SB),NOSPLIT,$0-8 JMP ·Store(SB) +TEXT ·StoreRel(SB),NOSPLIT,$0-8 + JMP ·Store(SB) + // void Or8(byte volatile*, byte); TEXT ·Or8(SB),NOSPLIT,$0-5 MOVW ptr+0(FP), R1 diff --git a/src/runtime/internal/atomic/asm_ppc64x.s b/src/runtime/internal/atomic/asm_ppc64x.s index a2ed4adc91..052b031cfb 100644 --- a/src/runtime/internal/atomic/asm_ppc64x.s +++ b/src/runtime/internal/atomic/asm_ppc64x.s @@ -59,6 +59,24 @@ cas64_fail: MOVB R0, ret+24(FP) RET +TEXT runtime∕internal∕atomic·CasRel(SB), NOSPLIT, $0-17 + MOVD ptr+0(FP), R3 + MOVWZ old+8(FP), R4 + MOVWZ new+12(FP), R5 + LWSYNC +cas_again: + LWAR (R3), $0, R6 // 0 = Mutex release hint + CMPW R6, R4 + BNE cas_fail + STWCCC R5, (R3) + BNE cas_again + MOVD $1, R3 + MOVB R3, ret+16(FP) + RET +cas_fail: + MOVB R0, ret+16(FP) + RET + TEXT runtime∕internal∕atomic·Casuintptr(SB), NOSPLIT, $0-25 BR runtime∕internal∕atomic·Cas64(SB) @@ -159,6 +177,13 @@ TEXT runtime∕internal∕atomic·Store64(SB), NOSPLIT, $0-16 MOVD R4, 0(R3) RET +TEXT runtime∕internal∕atomic·StoreRel(SB), NOSPLIT, $0-12 + MOVD ptr+0(FP), R3 + MOVW val+8(FP), R4 + LWSYNC + MOVW R4, 0(R3) + RET + // void runtime∕internal∕atomic·Or8(byte volatile*, byte); TEXT runtime∕internal∕atomic·Or8(SB), NOSPLIT, $0-9 MOVD ptr+0(FP), R3 diff --git a/src/runtime/internal/atomic/asm_s390x.s b/src/runtime/internal/atomic/asm_s390x.s index e25703e077..512fde5a12 100644 --- a/src/runtime/internal/atomic/asm_s390x.s +++ b/src/runtime/internal/atomic/asm_s390x.s @@ -48,6 +48,10 @@ cas64_fail: TEXT ·Casuintptr(SB), NOSPLIT, $0-25 BR ·Cas64(SB) +// func CasRel(ptr *uint32, old, new uint32) bool +TEXT ·CasRel(SB), NOSPLIT, $0-17 + BR ·Cas(SB) + // func Loaduintptr(ptr *uintptr) uintptr TEXT ·Loaduintptr(SB), NOSPLIT, $0-16 BR ·Load64(SB) diff --git a/src/runtime/internal/atomic/atomic_386.go b/src/runtime/internal/atomic/atomic_386.go index 4284d2bd7d..ad71ebd971 100644 --- a/src/runtime/internal/atomic/atomic_386.go +++ b/src/runtime/internal/atomic/atomic_386.go @@ -20,6 +20,12 @@ func Loadp(ptr unsafe.Pointer) unsafe.Pointer { return *(*unsafe.Pointer)(ptr) } +//go:nosplit +//go:noinline +func LoadAcq(ptr *uint32) uint32 { + return *ptr +} + //go:noescape func Xadd64(ptr *uint64, delta int64) uint64 @@ -52,11 +58,17 @@ func Or8(ptr *uint8, val uint8) //go:noescape func Cas64(ptr *uint64, old, new uint64) bool +//go:noescape +func CasRel(ptr *uint32, old, new uint32) bool + //go:noescape func Store(ptr *uint32, val uint32) //go:noescape func Store64(ptr *uint64, val uint64) +//go:noescape +func StoreRel(ptr *uint32, val uint32) + // NO go:noescape annotation; see atomic_pointer.go. func StorepNoWB(ptr unsafe.Pointer, val unsafe.Pointer) diff --git a/src/runtime/internal/atomic/atomic_amd64x.go b/src/runtime/internal/atomic/atomic_amd64x.go index 54851d30f4..d4fe461609 100644 --- a/src/runtime/internal/atomic/atomic_amd64x.go +++ b/src/runtime/internal/atomic/atomic_amd64x.go @@ -26,6 +26,12 @@ func Load64(ptr *uint64) uint64 { return *ptr } +//go:nosplit +//go:noinline +func LoadAcq(ptr *uint32) uint32 { + return *ptr +} + //go:noescape func Xadd(ptr *uint32, delta int32) uint32 @@ -55,12 +61,18 @@ func Or8(ptr *uint8, val uint8) //go:noescape func Cas64(ptr *uint64, old, new uint64) bool +//go:noescape +func CasRel(ptr *uint32, old, new uint32) bool + //go:noescape func Store(ptr *uint32, val uint32) //go:noescape func Store64(ptr *uint64, val uint64) +//go:noescape +func StoreRel(ptr *uint32, val uint32) + // StorepNoWB performs *ptr = val atomically and without a write // barrier. // diff --git a/src/runtime/internal/atomic/atomic_arm.go b/src/runtime/internal/atomic/atomic_arm.go index 1ecdb11db9..51b42ba238 100644 --- a/src/runtime/internal/atomic/atomic_arm.go +++ b/src/runtime/internal/atomic/atomic_arm.go @@ -74,6 +74,9 @@ func StorepNoWB(addr unsafe.Pointer, v unsafe.Pointer) //go:noescape func Store(addr *uint32, v uint32) +//go:noescape +func StoreRel(addr *uint32, v uint32) + //go:nosplit func goCas64(addr *uint64, old, new uint64) bool { if uintptr(unsafe.Pointer(addr))&7 != 0 { @@ -181,9 +184,15 @@ func Load(addr *uint32) uint32 //go:noescape func Loadp(addr unsafe.Pointer) unsafe.Pointer +//go:noescape +func LoadAcq(addr *uint32) uint32 + //go:noescape func Cas64(addr *uint64, old, new uint64) bool +//go:noescape +func CasRel(addr *uint32, old, new uint32) bool + //go:noescape func Xadd64(addr *uint64, delta int64) uint64 diff --git a/src/runtime/internal/atomic/atomic_arm64.go b/src/runtime/internal/atomic/atomic_arm64.go index 3554b7f236..a2da27e7ed 100644 --- a/src/runtime/internal/atomic/atomic_arm64.go +++ b/src/runtime/internal/atomic/atomic_arm64.go @@ -35,6 +35,9 @@ func Load64(ptr *uint64) uint64 //go:noescape func Loadp(ptr unsafe.Pointer) unsafe.Pointer +//go:noescape +func LoadAcq(addr *uint32) uint32 + //go:noescape func Or8(ptr *uint8, val uint8) @@ -44,6 +47,9 @@ func And8(ptr *uint8, val uint8) //go:noescape func Cas64(ptr *uint64, old, new uint64) bool +//go:noescape +func CasRel(ptr *uint32, old, new uint32) bool + //go:noescape func Store(ptr *uint32, val uint32) @@ -52,3 +58,6 @@ func Store64(ptr *uint64, val uint64) // NO go:noescape annotation; see atomic_pointer.go. func StorepNoWB(ptr unsafe.Pointer, val unsafe.Pointer) + +//go:noescape +func StoreRel(ptr *uint32, val uint32) diff --git a/src/runtime/internal/atomic/atomic_arm64.s b/src/runtime/internal/atomic/atomic_arm64.s index 354fd1e94b..c979f2246f 100644 --- a/src/runtime/internal/atomic/atomic_arm64.s +++ b/src/runtime/internal/atomic/atomic_arm64.s @@ -25,9 +25,16 @@ TEXT ·Loadp(SB),NOSPLIT,$0-16 MOVD R0, ret+8(FP) RET +// uint32 runtime∕internal∕atomic·LoadAcq(uint32 volatile* addr) +TEXT ·LoadAcq(SB),NOSPLIT,$0-12 + B ·Load(SB) + TEXT runtime∕internal∕atomic·StorepNoWB(SB), NOSPLIT, $0-16 B runtime∕internal∕atomic·Store64(SB) +TEXT runtime∕internal∕atomic·StoreRel(SB), NOSPLIT, $0-12 + B runtime∕internal∕atomic·Store(SB) + TEXT runtime∕internal∕atomic·Store(SB), NOSPLIT, $0-12 MOVD ptr+0(FP), R0 MOVW val+8(FP), R1 diff --git a/src/runtime/internal/atomic/atomic_mips64x.go b/src/runtime/internal/atomic/atomic_mips64x.go index d06ea4809a..98a8fca929 100644 --- a/src/runtime/internal/atomic/atomic_mips64x.go +++ b/src/runtime/internal/atomic/atomic_mips64x.go @@ -35,6 +35,9 @@ func Load64(ptr *uint64) uint64 //go:noescape func Loadp(ptr unsafe.Pointer) unsafe.Pointer +//go:noescape +func LoadAcq(ptr *uint32) uint32 + //go:noescape func And8(ptr *uint8, val uint8) @@ -46,6 +49,9 @@ func Or8(ptr *uint8, val uint8) //go:noescape func Cas64(ptr *uint64, old, new uint64) bool +//go:noescape +func CasRel(ptr *uint32, old, new uint32) bool + //go:noescape func Store(ptr *uint32, val uint32) @@ -54,3 +60,6 @@ func Store64(ptr *uint64, val uint64) // NO go:noescape annotation; see atomic_pointer.go. func StorepNoWB(ptr unsafe.Pointer, val unsafe.Pointer) + +//go:noescape +func StoreRel(ptr *uint32, val uint32) diff --git a/src/runtime/internal/atomic/atomic_mips64x.s b/src/runtime/internal/atomic/atomic_mips64x.s index 087672f5cc..5214afe2d6 100644 --- a/src/runtime/internal/atomic/atomic_mips64x.s +++ b/src/runtime/internal/atomic/atomic_mips64x.s @@ -34,3 +34,7 @@ TEXT ·Loadp(SB),NOSPLIT|NOFRAME,$0-16 SYNC MOVV R1, ret+8(FP) RET + +// uint32 runtime∕internal∕atomic·LoadAcq(uint32 volatile* ptr) +TEXT ·LoadAcq(SB),NOSPLIT|NOFRAME,$0-12 + JMP atomic·Load(SB) diff --git a/src/runtime/internal/atomic/atomic_mipsx.go b/src/runtime/internal/atomic/atomic_mipsx.go index 55943f6925..1cd6d9a9ce 100644 --- a/src/runtime/internal/atomic/atomic_mipsx.go +++ b/src/runtime/internal/atomic/atomic_mipsx.go @@ -119,6 +119,9 @@ func Load(ptr *uint32) uint32 //go:noescape func Loadp(ptr unsafe.Pointer) unsafe.Pointer +//go:noescape +func LoadAcq(ptr *uint32) uint32 + //go:noescape func And8(ptr *uint8, val uint8) @@ -130,3 +133,9 @@ func Store(ptr *uint32, val uint32) // NO go:noescape annotation; see atomic_pointer.go. func StorepNoWB(ptr unsafe.Pointer, val unsafe.Pointer) + +//go:noescape +func StoreRel(ptr *uint32, val uint32) + +//go:noescape +func CasRel(addr *uint32, old, new uint32) bool diff --git a/src/runtime/internal/atomic/atomic_ppc64x.go b/src/runtime/internal/atomic/atomic_ppc64x.go index 72c98eb0c5..4f1a95c5bd 100644 --- a/src/runtime/internal/atomic/atomic_ppc64x.go +++ b/src/runtime/internal/atomic/atomic_ppc64x.go @@ -35,6 +35,9 @@ func Load64(ptr *uint64) uint64 //go:noescape func Loadp(ptr unsafe.Pointer) unsafe.Pointer +//go:noescape +func LoadAcq(ptr *uint32) uint32 + //go:noescape func And8(ptr *uint8, val uint8) @@ -46,11 +49,17 @@ func Or8(ptr *uint8, val uint8) //go:noescape func Cas64(ptr *uint64, old, new uint64) bool +//go:noescape +func CasRel(ptr *uint32, old, new uint32) bool + //go:noescape func Store(ptr *uint32, val uint32) //go:noescape func Store64(ptr *uint64, val uint64) +//go:noescape +func StoreRel(ptr *uint32, val uint32) + // NO go:noescape annotation; see atomic_pointer.go. func StorepNoWB(ptr unsafe.Pointer, val unsafe.Pointer) diff --git a/src/runtime/internal/atomic/atomic_ppc64x.s b/src/runtime/internal/atomic/atomic_ppc64x.s index c9c2d1fc0c..c079ea494f 100644 --- a/src/runtime/internal/atomic/atomic_ppc64x.s +++ b/src/runtime/internal/atomic/atomic_ppc64x.s @@ -38,3 +38,12 @@ TEXT ·Loadp(SB),NOSPLIT|NOFRAME,$-8-16 ISYNC MOVD R3, ret+8(FP) RET + +// uint32 runtime∕internal∕atomic·LoadAcq(uint32 volatile* ptr) +TEXT ·LoadAcq(SB),NOSPLIT|NOFRAME,$-8-12 + MOVD ptr+0(FP), R3 + MOVWZ 0(R3), R3 + CMPW R3, R3, CR7 + BC 4, 30, 1(PC) // bne- cr7, 0x4 + MOVW R3, ret+8(FP) + RET diff --git a/src/runtime/internal/atomic/atomic_s390x.go b/src/runtime/internal/atomic/atomic_s390x.go index 9343853485..ec294a27ba 100644 --- a/src/runtime/internal/atomic/atomic_s390x.go +++ b/src/runtime/internal/atomic/atomic_s390x.go @@ -24,6 +24,12 @@ func Load64(ptr *uint64) uint64 { return *ptr } +//go:nosplit +//go:noinline +func LoadAcq(ptr *uint32) uint32 { + return *ptr +} + //go:noinline //go:nosplit func Store(ptr *uint32, val uint32) { @@ -43,6 +49,12 @@ func StorepNoWB(ptr unsafe.Pointer, val unsafe.Pointer) { *(*uintptr)(ptr) = uintptr(val) } +//go:noinline +//go:nosplit +func StoreRel(ptr *uint32, val uint32) { + *ptr = val +} + //go:noescape func And8(ptr *uint8, val uint8) @@ -71,3 +83,6 @@ func Xchguintptr(ptr *uintptr, new uintptr) uintptr //go:noescape func Cas64(ptr *uint64, old, new uint64) bool + +//go:noescape +func CasRel(ptr *uint32, old, new uint32) bool diff --git a/src/runtime/internal/atomic/atomic_wasm.go b/src/runtime/internal/atomic/atomic_wasm.go index cbf254fcb5..71288e9003 100644 --- a/src/runtime/internal/atomic/atomic_wasm.go +++ b/src/runtime/internal/atomic/atomic_wasm.go @@ -21,6 +21,12 @@ func Loadp(ptr unsafe.Pointer) unsafe.Pointer { return *(*unsafe.Pointer)(ptr) } +//go:nosplit +//go:noinline +func LoadAcq(ptr *uint32) uint32 { + return *ptr +} + //go:nosplit //go:noinline func Load64(ptr *uint64) uint64 { @@ -105,6 +111,12 @@ func Store(ptr *uint32, val uint32) { *ptr = val } +//go:nosplit +//go:noinline +func StoreRel(ptr *uint32, val uint32) { + *ptr = val +} + //go:nosplit //go:noinline func Store64(ptr *uint64, val uint64) { @@ -147,6 +159,16 @@ func Casuintptr(ptr *uintptr, old, new uintptr) bool { return false } +//go:nosplit +//go:noinline +func CasRel(ptr *uint32, old, new uint32) bool { + if *ptr == old { + *ptr = new + return true + } + return false +} + //go:nosplit //go:noinline func Storeuintptr(ptr *uintptr, new uintptr) { diff --git a/src/runtime/proc.go b/src/runtime/proc.go index 86c14997b1..844e023715 100644 --- a/src/runtime/proc.go +++ b/src/runtime/proc.go @@ -4765,11 +4765,11 @@ func runqput(_p_ *p, gp *g, next bool) { } retry: - h := atomic.Load(&_p_.runqhead) // load-acquire, synchronize with consumers + h := atomic.LoadAcq(&_p_.runqhead) // load-acquire, synchronize with consumers t := _p_.runqtail if t-h < uint32(len(_p_.runq)) { _p_.runq[t%uint32(len(_p_.runq))].set(gp) - atomic.Store(&_p_.runqtail, t+1) // store-release, makes the item available for consumption + atomic.StoreRel(&_p_.runqtail, t+1) // store-release, makes the item available for consumption return } if runqputslow(_p_, gp, h, t) { @@ -4793,7 +4793,7 @@ func runqputslow(_p_ *p, gp *g, h, t uint32) bool { for i := uint32(0); i < n; i++ { batch[i] = _p_.runq[(h+i)%uint32(len(_p_.runq))].ptr() } - if !atomic.Cas(&_p_.runqhead, h, h+n) { // cas-release, commits consume + if !atomic.CasRel(&_p_.runqhead, h, h+n) { // cas-release, commits consume return false } batch[n] = gp @@ -4837,13 +4837,13 @@ func runqget(_p_ *p) (gp *g, inheritTime bool) { } for { - h := atomic.Load(&_p_.runqhead) // load-acquire, synchronize with other consumers + h := atomic.LoadAcq(&_p_.runqhead) // load-acquire, synchronize with other consumers t := _p_.runqtail if t == h { return nil, false } gp := _p_.runq[h%uint32(len(_p_.runq))].ptr() - if atomic.Cas(&_p_.runqhead, h, h+1) { // cas-release, commits consume + if atomic.CasRel(&_p_.runqhead, h, h+1) { // cas-release, commits consume return gp, false } } @@ -4855,8 +4855,8 @@ func runqget(_p_ *p) (gp *g, inheritTime bool) { // Can be executed by any P. func runqgrab(_p_ *p, batch *[256]guintptr, batchHead uint32, stealRunNextG bool) uint32 { for { - h := atomic.Load(&_p_.runqhead) // load-acquire, synchronize with other consumers - t := atomic.Load(&_p_.runqtail) // load-acquire, synchronize with the producer + h := atomic.LoadAcq(&_p_.runqhead) // load-acquire, synchronize with other consumers + t := atomic.LoadAcq(&_p_.runqtail) // load-acquire, synchronize with the producer n := t - h n = n - n/2 if n == 0 { @@ -4899,7 +4899,7 @@ func runqgrab(_p_ *p, batch *[256]guintptr, batchHead uint32, stealRunNextG bool g := _p_.runq[(h+i)%uint32(len(_p_.runq))] batch[(batchHead+i)%uint32(len(batch))] = g } - if atomic.Cas(&_p_.runqhead, h, h+n) { // cas-release, commits consume + if atomic.CasRel(&_p_.runqhead, h, h+n) { // cas-release, commits consume return n } } @@ -4919,11 +4919,11 @@ func runqsteal(_p_, p2 *p, stealRunNextG bool) *g { if n == 0 { return gp } - h := atomic.Load(&_p_.runqhead) // load-acquire, synchronize with consumers + h := atomic.LoadAcq(&_p_.runqhead) // load-acquire, synchronize with consumers if t-h+n >= uint32(len(_p_.runq)) { throw("runqsteal: runq overflow") } - atomic.Store(&_p_.runqtail, t+n) // store-release, makes the item available for consumption + atomic.StoreRel(&_p_.runqtail, t+n) // store-release, makes the item available for consumption return gp } From 6994731ec2babb6a4f2bbbb08dbe649767a25942 Mon Sep 17 00:00:00 2001 From: Lynn Boger Date: Mon, 27 Aug 2018 17:15:39 -0400 Subject: [PATCH 233/240] internal/bytealg: improve asm for memequal on ppc64x MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This includes two changes to the memequal function. Previously the asm implementation on ppc64x for Equal called the internal function memequal using a BL, whereas the other asm implementations for bytes functions on ppc64x used BR. The BR is preferred because the BL causes the calling function to stack a frame. This changes Equal so it uses BR and is consistent with the others. This also uses vsx instructions where possible to improve performance of the compares for sizes over 32. Here are results from the sizes affected: Equal/32 8.40ns ± 0% 7.66ns ± 0% -8.81% (p=0.029 n=4+4) Equal/4K 193ns ± 0% 144ns ± 0% -25.39% (p=0.029 n=4+4) Equal/4M 346µs ± 0% 277µs ± 0% -20.08% (p=0.029 n=4+4) Equal/64M 7.66ms ± 1% 7.27ms ± 0% -5.10% (p=0.029 n=4+4) Change-Id: Ib6ee2cdc3e5d146e2705e3338858b8e965d25420 Reviewed-on: https://go-review.googlesource.com/c/143060 Run-TryBot: Lynn Boger Reviewed-by: Carlos Eduardo Seo Reviewed-by: David Chase --- src/internal/bytealg/equal_ppc64x.s | 64 ++++++++++++----------------- 1 file changed, 26 insertions(+), 38 deletions(-) diff --git a/src/internal/bytealg/equal_ppc64x.s b/src/internal/bytealg/equal_ppc64x.s index 9c9cf77588..34d2a2574b 100644 --- a/src/internal/bytealg/equal_ppc64x.s +++ b/src/internal/bytealg/equal_ppc64x.s @@ -7,17 +7,15 @@ #include "go_asm.h" #include "textflag.h" -TEXT ·Equal(SB),NOSPLIT,$0-49 +TEXT ·Equal(SB),NOSPLIT|NOFRAME,$0-49 MOVD a_len+8(FP), R4 MOVD b_len+32(FP), R5 CMP R5, R4 // unequal lengths are not equal BNE noteq MOVD a_base+0(FP), R3 MOVD b_base+24(FP), R4 - BL memeqbody<>(SB) - - MOVBZ R9,ret+48(FP) - RET + MOVD $ret+48(FP), R10 + BR memeqbody<>(SB) noteq: MOVBZ $0,ret+48(FP) @@ -28,7 +26,7 @@ equal: MOVBZ R3,ret+48(FP) RET -TEXT bytes·Equal(SB),NOSPLIT,$0-49 +TEXT bytes·Equal(SB),NOSPLIT|NOFRAME,$0-49 FUNCDATA $0, ·Equal·args_stackmap(SB) MOVD a_len+8(FP), R4 MOVD b_len+32(FP), R5 @@ -36,10 +34,8 @@ TEXT bytes·Equal(SB),NOSPLIT,$0-49 BNE noteq MOVD a_base+0(FP), R3 MOVD b_base+24(FP), R4 - BL memeqbody<>(SB) - - MOVBZ R9,ret+48(FP) - RET + MOVD $ret+48(FP), R10 + BR memeqbody<>(SB) noteq: MOVBZ $0,ret+48(FP) @@ -51,25 +47,23 @@ equal: RET // memequal(a, b unsafe.Pointer, size uintptr) bool -TEXT runtime·memequal(SB),NOSPLIT,$0-25 +TEXT runtime·memequal(SB),NOSPLIT|NOFRAME,$0-25 MOVD a+0(FP), R3 MOVD b+8(FP), R4 MOVD size+16(FP), R5 + MOVD $ret+24(FP), R10 - BL memeqbody<>(SB) - MOVB R9, ret+24(FP) - RET + BR memeqbody<>(SB) // memequal_varlen(a, b unsafe.Pointer) bool -TEXT runtime·memequal_varlen(SB),NOSPLIT,$40-17 +TEXT runtime·memequal_varlen(SB),NOSPLIT|NOFRAME,$0-17 MOVD a+0(FP), R3 MOVD b+8(FP), R4 CMP R3, R4 BEQ eq MOVD 8(R11), R5 // compiler stores size at offset 8 in the closure - BL memeqbody<>(SB) - MOVB R9, ret+16(FP) - RET + MOVD $ret+16(FP), R10 + BR memeqbody<>(SB) eq: MOVD $1, R3 MOVB R3, ret+16(FP) @@ -79,7 +73,7 @@ eq: // R3 = s1 // R4 = s2 // R5 = len -// R9 = return value +// R10 = addr of return value (byte) TEXT memeqbody<>(SB),NOSPLIT|NOFRAME,$0-0 MOVD R5,CTR CMP R5,$8 // only optimize >=8 @@ -92,26 +86,19 @@ TEXT memeqbody<>(SB),NOSPLIT|NOFRAME,$0-0 setup32a: // 8 byte aligned, >= 32 bytes SRADCC $5,R5,R6 // number of 32 byte chunks to compare MOVD R6,CTR + MOVD $16,R14 // index for VSX loads and stores loop32a: - MOVD 0(R3),R6 // doublewords to compare - MOVD 0(R4),R7 - MOVD 8(R3),R8 // - MOVD 8(R4),R9 - CMP R6,R7 // bytes batch? - BNE noteq - MOVD 16(R3),R6 - MOVD 16(R4),R7 - CMP R8,R9 // bytes match? - MOVD 24(R3),R8 - MOVD 24(R4),R9 - BNE noteq - CMP R6,R7 // bytes match? - BNE noteq + LXVD2X (R3+R0), VS32 // VS32 = V0 + LXVD2X (R4+R0), VS33 // VS33 = V1 + VCMPEQUBCC V0, V1, V2 // compare, setting CR6 + BGE CR6, noteq + LXVD2X (R3+R14), VS32 + LXVD2X (R4+R14), VS33 + VCMPEQUBCC V0, V1, V2 + BGE CR6, noteq ADD $32,R3 // bump up to next 32 ADD $32,R4 - CMP R8,R9 // bytes match? - BC 8,2,loop32a // br ctr and cr - BNE noteq + BC 16, 0, loop32a // br ctr and cr ANDCC $24,R5,R6 // Any 8 byte chunks? BEQ leftover // and result is 0 setup8a: @@ -145,9 +132,10 @@ simple: BNE noteq BR equal noteq: - MOVD $0, R9 + MOVB $0, (R10) RET equal: - MOVD $1, R9 + MOVD $1, R3 + MOVB R3, (R10) RET From e41fbc79ccfedc5bf4d07356c20de0731bd9cfd9 Mon Sep 17 00:00:00 2001 From: Lynn Boger Date: Mon, 22 Oct 2018 16:02:43 -0400 Subject: [PATCH 234/240] runtime: use unsigned load for iscgo variable in ppc64x runtime asm This changes the runtime asm code that loads iscgo to use MOVBZ instead of MOVB, avoiding an unnecessary sign extension. This is most significant in runtime.save_g, reducing the size from 8 to 7 instructions. Change-Id: Iaa2121464b5309e1f27fd91b19b5603c7aaf619d Reviewed-on: https://go-review.googlesource.com/c/144217 Run-TryBot: Lynn Boger TryBot-Result: Gobot Gobot Reviewed-by: David Chase --- src/runtime/asm_ppc64x.s | 2 +- src/runtime/sys_linux_ppc64x.s | 2 +- src/runtime/tls_ppc64x.s | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/src/runtime/asm_ppc64x.s b/src/runtime/asm_ppc64x.s index e77c717935..87076817f9 100644 --- a/src/runtime/asm_ppc64x.s +++ b/src/runtime/asm_ppc64x.s @@ -648,7 +648,7 @@ TEXT ·cgocallback_gofunc(SB),NOSPLIT,$16-32 NO_LOCAL_POINTERS // Load m and g from thread-local storage. - MOVB runtime·iscgo(SB), R3 + MOVBZ runtime·iscgo(SB), R3 CMP R3, $0 BEQ nocgo BL runtime·load_g(SB) diff --git a/src/runtime/sys_linux_ppc64x.s b/src/runtime/sys_linux_ppc64x.s index 5b5df50d41..bf01099830 100644 --- a/src/runtime/sys_linux_ppc64x.s +++ b/src/runtime/sys_linux_ppc64x.s @@ -301,7 +301,7 @@ TEXT runtime·_sigtramp(SB),NOSPLIT,$64 // this might be called in external code context, // where g is not set. - MOVB runtime·iscgo(SB), R6 + MOVBZ runtime·iscgo(SB), R6 CMP R6, $0 BEQ 2(PC) BL runtime·load_g(SB) diff --git a/src/runtime/tls_ppc64x.s b/src/runtime/tls_ppc64x.s index 82714853ee..c697449282 100644 --- a/src/runtime/tls_ppc64x.s +++ b/src/runtime/tls_ppc64x.s @@ -24,7 +24,7 @@ // NOTE: setg_gcc<> assume this clobbers only R31. TEXT runtime·save_g(SB),NOSPLIT|NOFRAME,$0-0 #ifndef GOOS_aix - MOVB runtime·iscgo(SB), R31 + MOVBZ runtime·iscgo(SB), R31 CMP R31, $0 BEQ nocgo #endif From bdba55653fa56eb119099a3efbff187a97e8cf44 Mon Sep 17 00:00:00 2001 From: Lynn Boger Date: Tue, 23 Oct 2018 12:33:56 -0400 Subject: [PATCH 235/240] cmd/asm/internal,cmd/internal/obj/ppc64: add alignment directive to asm for ppc64x MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This adds support for an alignment directive that can be used within Go asm to indicate preferred code alignment for ppc64x. This is intended to be used with loops to improve performance. This change only adds the directive and aligns the code based on it. Follow up changes will modify asm functions for ppc64x that benefit from preferred alignment. Fixes #14935 Here is one example of the improvement in memmove when the directive is used on the loops in the code: Memmove/64 8.74ns ± 0% 8.64ns ± 0% -1.19% (p=0.000 n=8+8) Memmove/128 11.5ns ± 0% 11.0ns ± 0% -4.35% (p=0.000 n=8+8) Memmove/256 23.0ns ± 0% 15.3ns ± 0% -33.48% (p=0.000 n=8+8) Memmove/512 31.7ns ± 0% 31.8ns ± 0% +0.32% (p=0.000 n=8+8) Memmove/1024 52.3ns ± 0% 43.9ns ± 0% -16.10% (p=0.000 n=8+8) Memmove/2048 93.2ns ± 0% 76.2ns ± 0% -18.24% (p=0.000 n=8+8) Memmove/4096 174ns ± 0% 141ns ± 0% -18.97% (p=0.000 n=8+8) Change-Id: I200d77e923dd5d78c22fe3f8eb142a8fbaff57bf Reviewed-on: https://go-review.googlesource.com/c/144218 Run-TryBot: Lynn Boger TryBot-Result: Gobot Gobot Reviewed-by: David Chase --- src/cmd/asm/internal/asm/asm.go | 22 ++++++++ src/cmd/asm/internal/asm/parse.go | 2 + src/cmd/internal/obj/link.go | 1 + src/cmd/internal/obj/ppc64/asm9.go | 80 ++++++++++++++++++++++++++---- src/cmd/internal/obj/util.go | 1 + 5 files changed, 95 insertions(+), 11 deletions(-) diff --git a/src/cmd/asm/internal/asm/asm.go b/src/cmd/asm/internal/asm/asm.go index 627be09d08..5da64f135a 100644 --- a/src/cmd/asm/internal/asm/asm.go +++ b/src/cmd/asm/internal/asm/asm.go @@ -308,6 +308,28 @@ func (p *Parser) asmPCData(operands [][]lex.Token) { p.append(prog, "", true) } +// asmPCAlign assembles a PCALIGN pseudo-op. +// PCALIGN $16 +func (p *Parser) asmPCAlign(operands [][]lex.Token) { + if len(operands) != 1 { + p.errorf("expect one operand for PCALIGN") + return + } + + // Operand 0 must be an immediate constant. + key := p.address(operands[0]) + if !p.validImmediate("PCALIGN", &key) { + return + } + + prog := &obj.Prog{ + Ctxt: p.ctxt, + As: obj.APCALIGN, + From: key, + } + p.append(prog, "", true) +} + // asmFuncData assembles a FUNCDATA pseudo-op. // FUNCDATA $1, funcdata<>+4(SB) func (p *Parser) asmFuncData(operands [][]lex.Token) { diff --git a/src/cmd/asm/internal/asm/parse.go b/src/cmd/asm/internal/asm/parse.go index 48749b7874..e77db9fba1 100644 --- a/src/cmd/asm/internal/asm/parse.go +++ b/src/cmd/asm/internal/asm/parse.go @@ -227,6 +227,8 @@ func (p *Parser) pseudo(word string, operands [][]lex.Token) bool { p.asmGlobl(operands) case "PCDATA": p.asmPCData(operands) + case "PCALIGN": + p.asmPCAlign(operands) case "TEXT": p.asmText(operands) default: diff --git a/src/cmd/internal/obj/link.go b/src/cmd/internal/obj/link.go index 354bda5e48..f983d5277e 100644 --- a/src/cmd/internal/obj/link.go +++ b/src/cmd/internal/obj/link.go @@ -344,6 +344,7 @@ const ( AFUNCDATA AJMP ANOP + APCALIGN APCDATA ARET AGETCALLERPC diff --git a/src/cmd/internal/obj/ppc64/asm9.go b/src/cmd/internal/obj/ppc64/asm9.go index 66a77b308c..a36565c9fd 100644 --- a/src/cmd/internal/obj/ppc64/asm9.go +++ b/src/cmd/internal/obj/ppc64/asm9.go @@ -602,6 +602,7 @@ var optab = []Optab{ {obj.ANOP, C_NONE, C_NONE, C_NONE, C_NONE, 0, 0, 0}, {obj.ADUFFZERO, C_NONE, C_NONE, C_NONE, C_LBRA, 11, 4, 0}, // same as ABR/ABL {obj.ADUFFCOPY, C_NONE, C_NONE, C_NONE, C_LBRA, 11, 4, 0}, // same as ABR/ABL + {obj.APCALIGN, C_LCON, C_NONE, C_NONE, C_NONE, 0, 0, 0}, // align code {obj.AXXX, C_NONE, C_NONE, C_NONE, C_NONE, 0, 4, 0}, } @@ -610,6 +611,28 @@ var oprange [ALAST & obj.AMask][]Optab var xcmp [C_NCLASS][C_NCLASS]bool +// padding bytes to add to align code as requested +func addpad(pc, a int64, ctxt *obj.Link) int { + switch a { + case 8: + if pc%8 != 0 { + return 4 + } + case 16: + switch pc % 16 { + // When currently aligned to 4, avoid 3 NOPs and set to + // 8 byte alignment which should still help. + case 4, 12: + return 4 + case 8: + return 8 + } + default: + ctxt.Diag("Unexpected alignment: %d for PCALIGN directive\n", a) + } + return 0 +} + func span9(ctxt *obj.Link, cursym *obj.LSym, newprog obj.ProgAlloc) { p := cursym.Func.Text if p == nil || p.Link == nil { // handle external functions and ELF section symbols @@ -632,12 +655,16 @@ func span9(ctxt *obj.Link, cursym *obj.LSym, newprog obj.ProgAlloc) { o = c.oplook(p) m = int(o.size) if m == 0 { - if p.As != obj.ANOP && p.As != obj.AFUNCDATA && p.As != obj.APCDATA { - c.ctxt.Diag("zero-width instruction\n%v", p) + if p.As == obj.APCALIGN { + a := c.vregoff(&p.From) + m = addpad(pc, a, ctxt) + } else { + if p.As != obj.ANOP && p.As != obj.AFUNCDATA && p.As != obj.APCDATA { + ctxt.Diag("zero-width instruction\n%v", p) + } + continue } - continue } - pc += int64(m) } @@ -686,10 +713,15 @@ func span9(ctxt *obj.Link, cursym *obj.LSym, newprog obj.ProgAlloc) { m = int(o.size) if m == 0 { - if p.As != obj.ANOP && p.As != obj.AFUNCDATA && p.As != obj.APCDATA { - c.ctxt.Diag("zero-width instruction\n%v", p) + if p.As == obj.APCALIGN { + a := c.vregoff(&p.From) + m = addpad(pc, a, ctxt) + } else { + if p.As != obj.ANOP && p.As != obj.AFUNCDATA && p.As != obj.APCDATA { + ctxt.Diag("zero-width instruction\n%v", p) + } + continue } - continue } pc += int64(m) @@ -698,7 +730,10 @@ func span9(ctxt *obj.Link, cursym *obj.LSym, newprog obj.ProgAlloc) { c.cursym.Size = pc } - pc += -pc & (funcAlign - 1) + if pc%funcAlign != 0 { + pc += funcAlign - (pc % funcAlign) + } + c.cursym.Size = pc /* @@ -716,10 +751,19 @@ func span9(ctxt *obj.Link, cursym *obj.LSym, newprog obj.ProgAlloc) { if int(o.size) > 4*len(out) { log.Fatalf("out array in span9 is too small, need at least %d for %v", o.size/4, p) } + origsize := o.size c.asmout(p, o, out[:]) - for i = 0; i < int32(o.size/4); i++ { - c.ctxt.Arch.ByteOrder.PutUint32(bp, out[i]) - bp = bp[4:] + if origsize == 0 && o.size > 0 { + for i = 0; i < int32(o.size/4); i++ { + c.ctxt.Arch.ByteOrder.PutUint32(bp, out[0]) + bp = bp[4:] + } + o.size = origsize + } else { + for i = 0; i < int32(o.size/4); i++ { + c.ctxt.Arch.ByteOrder.PutUint32(bp, out[i]) + bp = bp[4:] + } } } } @@ -1897,6 +1941,7 @@ func buildop(ctxt *obj.Link) { obj.ATEXT, obj.AUNDEF, obj.AFUNCDATA, + obj.APCALIGN, obj.APCDATA, obj.ADUFFZERO, obj.ADUFFCOPY: @@ -2305,6 +2350,19 @@ func (c *ctxt9) asmout(p *obj.Prog, o *Optab, out []uint32) { prasm(p) case 0: /* pseudo ops */ + if p.As == obj.APCALIGN { + aln := c.vregoff(&p.From) + v := addpad(p.Pc, aln, c.ctxt) + if v > 0 { + for i := 0; i < 6; i++ { + out[i] = uint32(0) + } + o.size = int8(v) + out[0] = LOP_RRR(OP_OR, REGZERO, REGZERO, REGZERO) + return + } + o.size = 0 + } break case 1: /* mov r1,r2 ==> OR Rs,Rs,Ra */ diff --git a/src/cmd/internal/obj/util.go b/src/cmd/internal/obj/util.go index aeb7854193..da938c998a 100644 --- a/src/cmd/internal/obj/util.go +++ b/src/cmd/internal/obj/util.go @@ -535,6 +535,7 @@ var Anames = []string{ "FUNCDATA", "JMP", "NOP", + "PCALIGN", "PCDATA", "RET", "GETCALLERPC", From 9a7e70e34f98a8eea5d18083634b6e908b23e619 Mon Sep 17 00:00:00 2001 From: David Chase Date: Thu, 18 Oct 2018 14:43:51 -0400 Subject: [PATCH 236/240] cmd/compile: schedule OpArg earlier in blocks for better debugging The location list for OpArg starts where the OpArg appears; this is not necessarily as soon as the OpArg coulde be observed, and it is reasonable for a user to expect that if a breakpoint is set "on f" then the arguments to f will be observable where that breakpoint happens to be set (this may also require setting the breakpoint after the prologue, but that is another issue). Change-Id: I0a1b848e50f475e5d8a5fad781241126872a0400 Reviewed-on: https://go-review.googlesource.com/c/142819 Run-TryBot: David Chase TryBot-Result: Gobot Gobot Reviewed-by: Heschi Kreinick Reviewed-by: Alessandro Arzilli Reviewed-by: Keith Randall --- src/cmd/compile/internal/ssa/schedule.go | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/cmd/compile/internal/ssa/schedule.go b/src/cmd/compile/internal/ssa/schedule.go index f1783a9532..9e19bb85b0 100644 --- a/src/cmd/compile/internal/ssa/schedule.go +++ b/src/cmd/compile/internal/ssa/schedule.go @@ -8,6 +8,7 @@ import "container/heap" const ( ScorePhi = iota // towards top of block + ScoreArg ScoreNilCheck ScoreReadTuple ScoreVarDef @@ -113,6 +114,9 @@ func schedule(f *Func) { case v.Op == OpVarDef: // We want all the vardefs next. score[v.ID] = ScoreVarDef + case v.Op == OpArg: + // We want all the args as early as possible, for better debugging. + score[v.ID] = ScoreArg case v.Type.IsMemory(): // Schedule stores as early as possible. This tends to // reduce register pressure. It also helps make sure From 1e38ecdbbee983a049500102af9e50ee33b446a8 Mon Sep 17 00:00:00 2001 From: Robert Griesemer Date: Tue, 23 Oct 2018 14:54:59 -0700 Subject: [PATCH 237/240] spec: refer to "run-time panic" rather than "exception" (cleanup) Fixes #28341. Change-Id: If8ae844c9b5e843ce9229c0a555f7006426baed7 Reviewed-on: https://go-review.googlesource.com/c/144260 Reviewed-by: Rob Pike --- doc/go_spec.html | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/doc/go_spec.html b/doc/go_spec.html index b8e11e83a4..cc2bada913 100644 --- a/doc/go_spec.html +++ b/doc/go_spec.html @@ -1,6 +1,6 @@ @@ -3260,7 +3260,7 @@ var v, ok T1 = x.(T) yields an additional untyped boolean value. The value of ok is true if the assertion holds. Otherwise it is false and the value of v is the zero value for type T. -No run-time panic occurs in this case. +No run-time panic occurs in this case.

    @@ -3624,7 +3624,7 @@ For signed integers, the operations +, -, *, /, and << may legally overflow and the resulting value exists and is deterministically defined by the signed integer representation, the operation, and its operands. -No exception is raised as a result of overflow. +Overflow does not cause a run-time panic. A compiler may not optimize code under the assumption that overflow does not occur. For instance, it may not assume that x < x + 1 is always true.

    From 980340ade7acb057c2e0e244a4002c96274f8a77 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20M=C3=B6hrmann?= Date: Tue, 23 Oct 2018 23:39:29 +0200 Subject: [PATCH 238/240] internal/cpu: add options and warnings for required cpu features MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Updates #27218 Change-Id: I8603f3a639cdd9ee201c4f1566692e5b88877fc4 Reviewed-on: https://go-review.googlesource.com/c/144107 Run-TryBot: Martin Möhrmann Reviewed-by: Brad Fitzpatrick --- src/internal/cpu/cpu.go | 12 +++++++++--- src/internal/cpu/cpu_arm64.go | 4 ++-- src/internal/cpu/cpu_ppc64x.go | 10 +++++----- src/internal/cpu/cpu_test.go | 5 +++-- src/internal/cpu/cpu_x86.go | 9 ++------- 5 files changed, 21 insertions(+), 19 deletions(-) diff --git a/src/internal/cpu/cpu.go b/src/internal/cpu/cpu.go index 925e4f7f6e..5e38ff7703 100644 --- a/src/internal/cpu/cpu.go +++ b/src/internal/cpu/cpu.go @@ -155,8 +155,9 @@ var options []option type option struct { Name string Feature *bool - Specified bool // Stores if feature value was specified in GODEBUGCPU. - Enable bool // Stores if feature should be enabled. + Specified bool // whether feature value was specified in GODEBUGCPU + Enable bool // whether feature should be enabled + Required bool // whether feature is mandatory and can not be disabled } // processOptions enables or disables CPU feature values based on the parsed env string. @@ -196,7 +197,7 @@ field: if key == "all" { for i := range options { options[i].Specified = true - options[i].Enable = enable + options[i].Enable = enable || options[i].Required } continue field } @@ -222,6 +223,11 @@ field: continue } + if !o.Enable && o.Required { + print("GODEBUGCPU: can not disable \"", o.Name, "\", required feature\n") + continue + } + *o.Feature = o.Enable } } diff --git a/src/internal/cpu/cpu_arm64.go b/src/internal/cpu/cpu_arm64.go index 25482a1f7e..0b3ee8e069 100644 --- a/src/internal/cpu/cpu_arm64.go +++ b/src/internal/cpu/cpu_arm64.go @@ -66,8 +66,8 @@ func doinit() { {Name: "asimdfhm", Feature: &ARM64.HasASIMDFHM}, // These capabilities should always be enabled on arm64: - // {Name: "fp", Feature: &ARM64.HasFP}, - // {Name: "asimd", Feature: &ARM64.HasASIMD}, + {Name: "fp", Feature: &ARM64.HasFP, Required: true}, + {Name: "asimd", Feature: &ARM64.HasASIMD, Required: true}, } // HWCAP feature bits diff --git a/src/internal/cpu/cpu_ppc64x.go b/src/internal/cpu/cpu_ppc64x.go index b39f5f5bbb..f59bb9dc8d 100644 --- a/src/internal/cpu/cpu_ppc64x.go +++ b/src/internal/cpu/cpu_ppc64x.go @@ -40,11 +40,11 @@ func doinit() { {Name: "scv", Feature: &PPC64.HasSCV}, // These capabilities should always be enabled on ppc64 and ppc64le: - // {Name: "vmx", Feature: &PPC64.HasVMX}, - // {Name: "dfp", Feature: &PPC64.HasDFP}, - // {Name: "vsx", Feature: &PPC64.HasVSX}, - // {Name: "isel", Feature: &PPC64.HasISEL}, - // {Name: "vcrypto", Feature: &PPC64.HasVCRYPTO}, + {Name: "vmx", Feature: &PPC64.HasVMX, Required: true}, + {Name: "dfp", Feature: &PPC64.HasDFP, Required: true}, + {Name: "vsx", Feature: &PPC64.HasVSX, Required: true}, + {Name: "isel", Feature: &PPC64.HasISEL, Required: true}, + {Name: "vcrypto", Feature: &PPC64.HasVCRYPTO, Required: true}, } // HWCAP feature bits diff --git a/src/internal/cpu/cpu_test.go b/src/internal/cpu/cpu_test.go index 6b4baa1694..46a351cfbc 100644 --- a/src/internal/cpu/cpu_test.go +++ b/src/internal/cpu/cpu_test.go @@ -52,8 +52,9 @@ func TestAllCapabilitiesDisabled(t *testing.T) { } for _, o := range Options { - if got := *o.Feature; got != false { - t.Errorf("%v: expected false, got %v", o.Name, got) + want := o.Required + if got := *o.Feature; got != want { + t.Errorf("%v: expected %v, got %v", o.Name, want, got) } } } diff --git a/src/internal/cpu/cpu_x86.go b/src/internal/cpu/cpu_x86.go index 014c8018f3..5d357be62b 100644 --- a/src/internal/cpu/cpu_x86.go +++ b/src/internal/cpu/cpu_x86.go @@ -55,13 +55,8 @@ func doinit() { {Name: "sse42", Feature: &X86.HasSSE42}, {Name: "ssse3", Feature: &X86.HasSSSE3}, - // sse2 set as last element so it can easily be removed again. See code below. - {Name: "sse2", Feature: &X86.HasSSE2}, - } - - // Remove sse2 from options on amd64(p32) because SSE2 is a mandatory feature for these GOARCHs. - if GOARCH == "amd64" || GOARCH == "amd64p32" { - options = options[:len(options)-1] + // These capabilities should always be enabled on amd64(p32): + {Name: "sse2", Feature: &X86.HasSSE2, Required: GOARCH == "amd64" || GOARCH == "amd64p32"}, } maxID, _, _, _ := cpuid(0, 0) From 202e9031444cef93c16a97cf076e5f8a9d9c3a75 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Mart=C3=AD?= Date: Thu, 18 Oct 2018 10:53:44 +0100 Subject: [PATCH 239/240] text/template: recover panics during function calls MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit There's precedent in handling panics that happen in functions called from the standard library. For example, if a fmt.Formatter implementation fails, fmt will absorb the panic into the output text. Recovering panics is useful, because otherwise one would have to wrap some Template.Execute calls with a recover. For example, if there's a chance that the callbacks may panic, or if part of the input data is nil when it shouldn't be. In particular, it's a common confusion amongst new Go developers that one can call a method on a nil receiver. Expecting text/template to error on such a call, they encounter a long and confusing panic if the method expects the receiver to be non-nil. To achieve this, introduce safeCall, which takes care of handling error returns as well as recovering panics. Handling panics in the "call" function isn't strictly necessary, as that func itself is run via evalCall. However, this makes the code more consistent, and can allow for better context in panics via the "call" function. Finally, add some test cases with a mix of funcs, methods, and func fields that panic. Fixes #28242. Change-Id: Id67be22cc9ebaedeb4b17fa84e677b4b6e09ec67 Reviewed-on: https://go-review.googlesource.com/c/143097 Run-TryBot: Daniel Martí TryBot-Result: Gobot Gobot Reviewed-by: Rob Pike --- src/text/template/exec.go | 10 +++--- src/text/template/exec_test.go | 59 ++++++++++++++++++++++++++++++++++ src/text/template/funcs.go | 23 ++++++++++--- 3 files changed, 83 insertions(+), 9 deletions(-) diff --git a/src/text/template/exec.go b/src/text/template/exec.go index 36cea3d24d..c6ce657cf6 100644 --- a/src/text/template/exec.go +++ b/src/text/template/exec.go @@ -693,13 +693,13 @@ func (s *state) evalCall(dot, fun reflect.Value, node parse.Node, name string, a } argv[i] = s.validateType(final, t) } - result := fun.Call(argv) - // If we have an error that is not nil, stop execution and return that error to the caller. - if len(result) == 2 && !result[1].IsNil() { + v, err := safeCall(fun, argv) + // If we have an error that is not nil, stop execution and return that + // error to the caller. + if err != nil { s.at(node) - s.errorf("error calling %s: %s", name, result[1].Interface().(error)) + s.errorf("error calling %s: %v", name, err) } - v := result[0] if v.Type() == reflectValueType { v = v.Interface().(reflect.Value) } diff --git a/src/text/template/exec_test.go b/src/text/template/exec_test.go index 648ad8ff03..bfd6d38bf4 100644 --- a/src/text/template/exec_test.go +++ b/src/text/template/exec_test.go @@ -74,6 +74,7 @@ type T struct { VariadicFuncInt func(int, ...string) string NilOKFunc func(*int) bool ErrFunc func() (string, error) + PanicFunc func() string // Template to test evaluation of templates. Tmpl *Template // Unexported field; cannot be accessed by template. @@ -156,6 +157,7 @@ var tVal = &T{ VariadicFuncInt: func(a int, s ...string) string { return fmt.Sprint(a, "=<", strings.Join(s, "+"), ">") }, NilOKFunc: func(s *int) bool { return s == nil }, ErrFunc: func() (string, error) { return "bla", nil }, + PanicFunc: func() string { panic("test panic") }, Tmpl: Must(New("x").Parse("test template")), // "x" is the value of .X } @@ -1451,3 +1453,60 @@ func TestInterfaceValues(t *testing.T) { } } } + +// Check that panics during calls are recovered and returned as errors. +func TestExecutePanicDuringCall(t *testing.T) { + funcs := map[string]interface{}{ + "doPanic": func() string { + panic("custom panic string") + }, + } + tests := []struct { + name string + input string + data interface{} + wantErr string + }{ + { + "direct func call panics", + "{{doPanic}}", (*T)(nil), + `template: t:1:2: executing "t" at : error calling doPanic: custom panic string`, + }, + { + "indirect func call panics", + "{{call doPanic}}", (*T)(nil), + `template: t:1:7: executing "t" at : error calling doPanic: custom panic string`, + }, + { + "direct method call panics", + "{{.GetU}}", (*T)(nil), + `template: t:1:2: executing "t" at <.GetU>: error calling GetU: runtime error: invalid memory address or nil pointer dereference`, + }, + { + "indirect method call panics", + "{{call .GetU}}", (*T)(nil), + `template: t:1:7: executing "t" at <.GetU>: error calling GetU: runtime error: invalid memory address or nil pointer dereference`, + }, + { + "func field call panics", + "{{call .PanicFunc}}", tVal, + `template: t:1:2: executing "t" at : error calling call: test panic`, + }, + } + for _, tc := range tests { + b := new(bytes.Buffer) + tmpl, err := New("t").Funcs(funcs).Parse(tc.input) + if err != nil { + t.Fatalf("parse error: %s", err) + } + err = tmpl.Execute(b, tc.data) + if err == nil { + t.Errorf("%s: expected error; got none", tc.name) + } else if !strings.Contains(err.Error(), tc.wantErr) { + if *debug { + fmt.Printf("%s: test execute error: %s\n", tc.name, err) + } + t.Errorf("%s: expected error:\n%s\ngot:\n%s", tc.name, tc.wantErr, err) + } + } +} diff --git a/src/text/template/funcs.go b/src/text/template/funcs.go index 31fe77a327..72d3f66691 100644 --- a/src/text/template/funcs.go +++ b/src/text/template/funcs.go @@ -275,11 +275,26 @@ func call(fn reflect.Value, args ...reflect.Value) (reflect.Value, error) { return reflect.Value{}, fmt.Errorf("arg %d: %s", i, err) } } - result := v.Call(argv) - if len(result) == 2 && !result[1].IsNil() { - return result[0], result[1].Interface().(error) + return safeCall(v, argv) +} + +// safeCall runs fun.Call(args), and returns the resulting value and error, if +// any. If the call panics, the panic value is returned as an error. +func safeCall(fun reflect.Value, args []reflect.Value) (val reflect.Value, err error) { + defer func() { + if r := recover(); r != nil { + if e, ok := r.(error); ok { + err = e + } else { + err = fmt.Errorf("%v", r) + } + } + }() + ret := fun.Call(args) + if len(ret) == 2 && !ret[1].IsNil() { + return ret[0], ret[1].Interface().(error) } - return result[0], nil + return ret[0], nil } // Boolean logic. From ab51b1d63bca0d14fdc477d7938372f51626dc0b Mon Sep 17 00:00:00 2001 From: Filippo Valsorda Date: Tue, 16 Oct 2018 20:06:08 -0400 Subject: [PATCH 240/240] crypto/tls: replace custom *block with standard buffers MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The crypto/tls record layer used a custom buffer implementation with its own semantics, freelist, and offset management. Replace it all with per-task bytes.Buffer, bytes.Reader and byte slices, along with a refactor of all the encrypt and decrypt code. The main quirk of *block was to do a best-effort read past the record boundary, so that if a closeNotify was waiting it would be peeked and surfaced along with the last Read. Address that with atLeastReader and ReadFrom to avoid a useless copy (instead of a LimitReader or CopyN). There was also an optimization to split blocks along record boundary lines without having to copy in and out the data. Replicate that by aliasing c.input into consumed c.rawInput (after an in-place decrypt operation). This is safe because c.rawInput is not used until c.input is drained. The benchmarks are noisy but look like an improvement across the board, which is a nice side effect :) name old time/op new time/op delta HandshakeServer/RSA-8 817µs ± 2% 797µs ± 2% -2.52% (p=0.000 n=10+9) HandshakeServer/ECDHE-P256-RSA-8 984µs ±11% 897µs ± 0% -8.89% (p=0.000 n=10+9) HandshakeServer/ECDHE-P256-ECDSA-P256-8 206µs ±10% 199µs ± 3% ~ (p=0.113 n=10+9) HandshakeServer/ECDHE-X25519-ECDSA-P256-8 204µs ± 3% 202µs ± 1% -1.06% (p=0.013 n=10+9) HandshakeServer/ECDHE-P521-ECDSA-P521-8 15.5ms ± 0% 15.6ms ± 1% ~ (p=0.095 n=9+10) Throughput/MaxPacket/1MB-8 5.35ms ±19% 5.39ms ±36% ~ (p=1.000 n=9+10) Throughput/MaxPacket/2MB-8 9.20ms ±15% 8.30ms ± 8% -9.79% (p=0.035 n=10+9) Throughput/MaxPacket/4MB-8 13.8ms ± 7% 13.6ms ± 8% ~ (p=0.315 n=10+10) Throughput/MaxPacket/8MB-8 25.1ms ± 3% 23.2ms ± 2% -7.66% (p=0.000 n=10+9) Throughput/MaxPacket/16MB-8 46.9ms ± 1% 43.0ms ± 3% -8.29% (p=0.000 n=9+10) Throughput/MaxPacket/32MB-8 88.9ms ± 2% 82.3ms ± 2% -7.40% (p=0.000 n=9+9) Throughput/MaxPacket/64MB-8 175ms ± 2% 164ms ± 4% -6.18% (p=0.000 n=10+10) Throughput/DynamicPacket/1MB-8 5.79ms ±26% 5.82ms ±22% ~ (p=0.912 n=10+10) Throughput/DynamicPacket/2MB-8 9.23ms ±14% 9.50ms ±23% ~ (p=0.971 n=10+10) Throughput/DynamicPacket/4MB-8 14.5ms ±11% 13.8ms ± 6% -4.66% (p=0.019 n=10+10) Throughput/DynamicPacket/8MB-8 25.6ms ± 4% 23.5ms ± 3% -8.33% (p=0.000 n=10+10) Throughput/DynamicPacket/16MB-8 47.3ms ± 3% 44.6ms ± 7% -5.65% (p=0.000 n=10+10) Throughput/DynamicPacket/32MB-8 91.9ms ±14% 85.0ms ± 4% -7.55% (p=0.000 n=10+10) Throughput/DynamicPacket/64MB-8 177ms ± 2% 168ms ± 4% -4.97% (p=0.000 n=8+10) Latency/MaxPacket/200kbps-8 694ms ± 0% 694ms ± 0% ~ (p=0.315 n=10+9) Latency/MaxPacket/500kbps-8 279ms ± 0% 279ms ± 0% ~ (p=0.447 n=9+10) Latency/MaxPacket/1000kbps-8 140ms ± 0% 140ms ± 0% ~ (p=0.661 n=9+10) Latency/MaxPacket/2000kbps-8 71.1ms ± 0% 71.1ms ± 0% +0.05% (p=0.019 n=9+9) Latency/MaxPacket/5000kbps-8 30.4ms ± 7% 30.5ms ± 4% ~ (p=0.720 n=9+10) Latency/DynamicPacket/200kbps-8 134ms ± 0% 134ms ± 0% ~ (p=0.075 n=10+10) Latency/DynamicPacket/500kbps-8 54.8ms ± 0% 54.8ms ± 0% ~ (p=0.631 n=10+10) Latency/DynamicPacket/1000kbps-8 28.5ms ± 0% 28.5ms ± 0% ~ (p=1.000 n=8+8) Latency/DynamicPacket/2000kbps-8 15.7ms ±12% 16.1ms ± 0% ~ (p=0.109 n=10+7) Latency/DynamicPacket/5000kbps-8 8.20ms ±26% 8.17ms ±13% ~ (p=1.000 n=9+9) name old speed new speed delta Throughput/MaxPacket/1MB-8 193MB/s ±14% 202MB/s ±30% ~ (p=0.897 n=8+10) Throughput/MaxPacket/2MB-8 230MB/s ±14% 249MB/s ±17% ~ (p=0.089 n=10+10) Throughput/MaxPacket/4MB-8 304MB/s ± 6% 309MB/s ± 7% ~ (p=0.315 n=10+10) Throughput/MaxPacket/8MB-8 334MB/s ± 3% 362MB/s ± 2% +8.29% (p=0.000 n=10+9) Throughput/MaxPacket/16MB-8 358MB/s ± 1% 390MB/s ± 3% +9.08% (p=0.000 n=9+10) Throughput/MaxPacket/32MB-8 378MB/s ± 2% 408MB/s ± 2% +8.00% (p=0.000 n=9+9) Throughput/MaxPacket/64MB-8 384MB/s ± 2% 410MB/s ± 4% +6.61% (p=0.000 n=10+10) Throughput/DynamicPacket/1MB-8 178MB/s ±24% 182MB/s ±24% ~ (p=0.604 n=9+10) Throughput/DynamicPacket/2MB-8 228MB/s ±13% 225MB/s ±20% ~ (p=0.971 n=10+10) Throughput/DynamicPacket/4MB-8 291MB/s ±10% 305MB/s ± 6% +4.83% (p=0.019 n=10+10) Throughput/DynamicPacket/8MB-8 327MB/s ± 4% 357MB/s ± 3% +9.08% (p=0.000 n=10+10) Throughput/DynamicPacket/16MB-8 355MB/s ± 3% 376MB/s ± 6% +6.07% (p=0.000 n=10+10) Throughput/DynamicPacket/32MB-8 366MB/s ±12% 395MB/s ± 4% +7.91% (p=0.000 n=10+10) Throughput/DynamicPacket/64MB-8 380MB/s ± 2% 400MB/s ± 4% +5.26% (p=0.000 n=8+10) Note that this reduced the buffer for the first read from 1024 to 5+512, so it triggered the issue described at #24198 when using a synchronous net.Pipe: the first server flight was not being consumed entirely by the first read anymore, causing a deadlock as both the client and the server were trying to send (the client a reply to the ServerHello, the server the rest of the buffer). Fixed by rebasing on top of CL 142817. Change-Id: Ie31b0a572b2ad37878469877798d5c6a5276f931 Reviewed-on: https://go-review.googlesource.com/c/142818 Run-TryBot: Filippo Valsorda TryBot-Result: Gobot Gobot Reviewed-by: Adam Langley --- src/crypto/tls/cipher_suites.go | 30 +- src/crypto/tls/conn.go | 624 +++++++++++++------------------- src/crypto/tls/tls.go | 11 +- 3 files changed, 288 insertions(+), 377 deletions(-) diff --git a/src/crypto/tls/cipher_suites.go b/src/crypto/tls/cipher_suites.go index d232996629..e937235876 100644 --- a/src/crypto/tls/cipher_suites.go +++ b/src/crypto/tls/cipher_suites.go @@ -134,25 +134,29 @@ func macSHA1(version uint16, key []byte) macFunction { copy(mac.key, key) return mac } - return tls10MAC{hmac.New(newConstantTimeHash(sha1.New), key)} + return tls10MAC{h: hmac.New(newConstantTimeHash(sha1.New), key)} } // macSHA256 returns a SHA-256 based MAC. These are only supported in TLS 1.2 // so the given version is ignored. func macSHA256(version uint16, key []byte) macFunction { - return tls10MAC{hmac.New(sha256.New, key)} + return tls10MAC{h: hmac.New(sha256.New, key)} } type macFunction interface { + // Size returns the length of the MAC. Size() int - MAC(digestBuf, seq, header, data, extra []byte) []byte + // MAC appends the MAC of (seq, header, data) to out. The extra data is fed + // into the MAC after obtaining the result to normalize timing. The result + // is only valid until the next invocation of MAC as the buffer is reused. + MAC(seq, header, data, extra []byte) []byte } type aead interface { cipher.AEAD - // explicitIVLen returns the number of bytes used by the explicit nonce - // that is included in the record. This is eight for older AEADs and + // explicitNonceLen returns the number of bytes of explicit nonce + // included in each record. This is eight for older AEADs and // zero for modern ones. explicitNonceLen() int } @@ -245,6 +249,7 @@ func aeadChaCha20Poly1305(key, fixedNonce []byte) cipher.AEAD { type ssl30MAC struct { h hash.Hash key []byte + buf []byte } func (s ssl30MAC) Size() int { @@ -257,7 +262,7 @@ var ssl30Pad2 = [48]byte{0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0x5c, 0 // MAC does not offer constant timing guarantees for SSL v3.0, since it's deemed // useless considering the similar, protocol-level POODLE vulnerability. -func (s ssl30MAC) MAC(digestBuf, seq, header, data, extra []byte) []byte { +func (s ssl30MAC) MAC(seq, header, data, extra []byte) []byte { padLength := 48 if s.h.Size() == 20 { padLength = 40 @@ -270,13 +275,13 @@ func (s ssl30MAC) MAC(digestBuf, seq, header, data, extra []byte) []byte { s.h.Write(header[:1]) s.h.Write(header[3:5]) s.h.Write(data) - digestBuf = s.h.Sum(digestBuf[:0]) + s.buf = s.h.Sum(s.buf[:0]) s.h.Reset() s.h.Write(s.key) s.h.Write(ssl30Pad2[:padLength]) - s.h.Write(digestBuf) - return s.h.Sum(digestBuf[:0]) + s.h.Write(s.buf) + return s.h.Sum(s.buf[:0]) } type constantTimeHash interface { @@ -304,7 +309,8 @@ func newConstantTimeHash(h func() hash.Hash) func() hash.Hash { // tls10MAC implements the TLS 1.0 MAC function. RFC 2246, Section 6.2.3. type tls10MAC struct { - h hash.Hash + h hash.Hash + buf []byte } func (s tls10MAC) Size() int { @@ -314,12 +320,12 @@ func (s tls10MAC) Size() int { // MAC is guaranteed to take constant time, as long as // len(seq)+len(header)+len(data)+len(extra) is constant. extra is not fed into // the MAC, but is only provided to make the timing profile constant. -func (s tls10MAC) MAC(digestBuf, seq, header, data, extra []byte) []byte { +func (s tls10MAC) MAC(seq, header, data, extra []byte) []byte { s.h.Reset() s.h.Write(seq) s.h.Write(header) s.h.Write(data) - res := s.h.Sum(digestBuf[:0]) + res := s.h.Sum(s.buf[:0]) if extra != nil { s.h.Write(extra) } diff --git a/src/crypto/tls/conn.go b/src/crypto/tls/conn.go index f05135bc33..13cebc9042 100644 --- a/src/crypto/tls/conn.go +++ b/src/crypto/tls/conn.go @@ -82,9 +82,10 @@ type Conn struct { // input/output in, out halfConn - rawInput *block // raw input, right off the wire - input *block // application data waiting to be read + rawInput bytes.Buffer // raw input, starting with a record header + input bytes.Reader // application data waiting to be read, from rawInput.Next hand bytes.Buffer // handshake data waiting to be read + outBuf []byte // scratch buffer used by out.encrypt buffering bool // whether records are buffered in sendBuf sendBuf []byte // a buffer of records waiting to be sent @@ -149,14 +150,10 @@ type halfConn struct { cipher interface{} // cipher algorithm mac macFunction seq [8]byte // 64-bit sequence number - bfree *block // list of free blocks additionalData [13]byte // to avoid allocs; interface method args escape nextCipher interface{} // next encryption state nextMac macFunction // next MAC algorithm - - // used to save allocating a new buffer for each MAC. - inDigestBuf, outDigestBuf []byte } func (hc *halfConn) setErrorLocked(err error) error { @@ -203,6 +200,30 @@ func (hc *halfConn) incSeq() { panic("TLS: sequence number wraparound") } +// explicitNonceLen returns the number of bytes of explicit nonce or IV included +// in each record. Explicit nonces are present only in CBC modes after TLS 1.0 +// and in certain AEAD modes in TLS 1.2. +func (hc *halfConn) explicitNonceLen() int { + if hc.cipher == nil { + return 0 + } + + switch c := hc.cipher.(type) { + case cipher.Stream: + return 0 + case aead: + return c.explicitNonceLen() + case cbcMode: + // TLS 1.1 introduced a per-record explicit IV to fix the BEAST attack. + if hc.version >= VersionTLS11 { + return c.BlockSize() + } + return 0 + default: + panic("unknown cipher type") + } +} + // extractPadding returns, in constant time, the length of the padding to remove // from the end of payload. It also returns a byte which is equal to 255 if the // padding was valid and 0 otherwise. See RFC 2246, Section 6.2.3.2. @@ -268,283 +289,189 @@ type cbcMode interface { SetIV([]byte) } -// decrypt checks and strips the mac and decrypts the data in b. Returns a -// success boolean, the number of bytes to skip from the start of the record in -// order to get the application payload, and an optional alert value. -func (hc *halfConn) decrypt(b *block) (ok bool, prefixLen int, alertValue alert) { - // pull out payload - payload := b.data[recordHeaderLen:] - - macSize := 0 - if hc.mac != nil { - macSize = hc.mac.Size() - } +// decrypt authenticates and decrypts the record if protection is active at +// this stage. The returned plaintext might overlap with the input. +func (hc *halfConn) decrypt(record []byte) (plaintext []byte, err error) { + payload := record[recordHeaderLen:] paddingGood := byte(255) paddingLen := 0 - explicitIVLen := 0 - // decrypt + explicitNonceLen := hc.explicitNonceLen() + if hc.cipher != nil { switch c := hc.cipher.(type) { case cipher.Stream: c.XORKeyStream(payload, payload) case aead: - explicitIVLen = c.explicitNonceLen() - if len(payload) < explicitIVLen { - return false, 0, alertBadRecordMAC + if len(payload) < explicitNonceLen { + return nil, alertBadRecordMAC } - nonce := payload[:explicitIVLen] - payload = payload[explicitIVLen:] - + nonce := payload[:explicitNonceLen] if len(nonce) == 0 { nonce = hc.seq[:] } + payload = payload[explicitNonceLen:] copy(hc.additionalData[:], hc.seq[:]) - copy(hc.additionalData[8:], b.data[:3]) + copy(hc.additionalData[8:], record[:3]) n := len(payload) - c.Overhead() hc.additionalData[11] = byte(n >> 8) hc.additionalData[12] = byte(n) + var err error - payload, err = c.Open(payload[:0], nonce, payload, hc.additionalData[:]) + plaintext, err = c.Open(payload[:0], nonce, payload, hc.additionalData[:]) if err != nil { - return false, 0, alertBadRecordMAC + return nil, alertBadRecordMAC } - b.resize(recordHeaderLen + explicitIVLen + len(payload)) case cbcMode: blockSize := c.BlockSize() - if hc.version >= VersionTLS11 { - explicitIVLen = blockSize + minPayload := explicitNonceLen + roundUp(hc.mac.Size()+1, blockSize) // TODO: vuln? + if len(payload)%blockSize != 0 || len(payload) < minPayload { + return nil, alertBadRecordMAC } - if len(payload)%blockSize != 0 || len(payload) < roundUp(explicitIVLen+macSize+1, blockSize) { - return false, 0, alertBadRecordMAC - } - - if explicitIVLen > 0 { - c.SetIV(payload[:explicitIVLen]) - payload = payload[explicitIVLen:] + if explicitNonceLen > 0 { + c.SetIV(payload[:explicitNonceLen]) + payload = payload[explicitNonceLen:] } c.CryptBlocks(payload, payload) + + // In a limited attempt to protect against CBC padding oracles like + // Lucky13, the data past paddingLen (which is secret) is passed to + // the MAC function as extra data, to be fed into the HMAC after + // computing the digest. This makes the MAC roughly constant time as + // long as the digest computation is constant time and does not + // affect the subsequent write, modulo cache effects. if hc.version == VersionSSL30 { paddingLen, paddingGood = extractPaddingSSL30(payload) } else { paddingLen, paddingGood = extractPadding(payload) - - // To protect against CBC padding oracles like Lucky13, the data - // past paddingLen (which is secret) is passed to the MAC - // function as extra data, to be fed into the HMAC after - // computing the digest. This makes the MAC constant time as - // long as the digest computation is constant time and does not - // affect the subsequent write. } default: panic("unknown cipher type") } + } else { + plaintext = payload } - // check, strip mac if hc.mac != nil { + macSize := hc.mac.Size() if len(payload) < macSize { - return false, 0, alertBadRecordMAC + return nil, alertBadRecordMAC } - // strip mac off payload, b.data n := len(payload) - macSize - paddingLen n = subtle.ConstantTimeSelect(int(uint32(n)>>31), 0, n) // if n < 0 { n = 0 } - b.data[3] = byte(n >> 8) - b.data[4] = byte(n) + record[3] = byte(n >> 8) + record[4] = byte(n) remoteMAC := payload[n : n+macSize] - localMAC := hc.mac.MAC(hc.inDigestBuf, hc.seq[0:], b.data[:recordHeaderLen], payload[:n], payload[n+macSize:]) + localMAC := hc.mac.MAC(hc.seq[0:], record[:recordHeaderLen], payload[:n], payload[n+macSize:]) if subtle.ConstantTimeCompare(localMAC, remoteMAC) != 1 || paddingGood != 255 { - return false, 0, alertBadRecordMAC + return nil, alertBadRecordMAC } - hc.inDigestBuf = localMAC - b.resize(recordHeaderLen + explicitIVLen + n) + plaintext = payload[:n] } - hc.incSeq() - return true, recordHeaderLen + explicitIVLen, 0 + hc.incSeq() + return plaintext, nil } -// padToBlockSize calculates the needed padding block, if any, for a payload. -// On exit, prefix aliases payload and extends to the end of the last full -// block of payload. finalBlock is a fresh slice which contains the contents of -// any suffix of payload as well as the needed padding to make finalBlock a -// full block. -func padToBlockSize(payload []byte, blockSize int) (prefix, finalBlock []byte) { - overrun := len(payload) % blockSize - paddingLen := blockSize - overrun - prefix = payload[:len(payload)-overrun] - finalBlock = make([]byte, blockSize) - copy(finalBlock, payload[len(payload)-overrun:]) - for i := overrun; i < blockSize; i++ { - finalBlock[i] = byte(paddingLen - 1) +// sliceForAppend extends the input slice by n bytes. head is the full extended +// slice, while tail is the appended part. If the original slice has sufficient +// capacity no allocation is performed. +func sliceForAppend(in []byte, n int) (head, tail []byte) { + if total := len(in) + n; cap(in) >= total { + head = in[:total] + } else { + head = make([]byte, total) + copy(head, in) } + tail = head[len(in):] return } -// encrypt encrypts and macs the data in b. -func (hc *halfConn) encrypt(b *block, explicitIVLen int) (bool, alert) { - // mac +// encrypt encrypts payload, adding the appropriate nonce and/or MAC, and +// appends it to record, which contains the record header. +func (hc *halfConn) encrypt(record, payload []byte, rand io.Reader) ([]byte, error) { + if hc.cipher == nil { + return append(record, payload...), nil + } + + var explicitNonce []byte + if explicitNonceLen := hc.explicitNonceLen(); explicitNonceLen > 0 { + record, explicitNonce = sliceForAppend(record, explicitNonceLen) + if _, isCBC := hc.cipher.(cbcMode); !isCBC && explicitNonceLen < 16 { + // The AES-GCM construction in TLS has an explicit nonce so that the + // nonce can be random. However, the nonce is only 8 bytes which is + // too small for a secure, random nonce. Therefore we use the + // sequence number as the nonce. The 3DES-CBC construction also has + // an 8 bytes nonce but its nonces must be unpredictable (see RFC + // 5246, Appendix F.3), forcing us to use randomness. That's not + // 3DES' biggest problem anyway because the birthday bound on block + // collision is reached first due to its simlarly small block size + // (see the Sweet32 attack). + copy(explicitNonce, hc.seq[:]) + } else { + if _, err := io.ReadFull(rand, explicitNonce); err != nil { + return nil, err + } + } + } + + var mac []byte if hc.mac != nil { - mac := hc.mac.MAC(hc.outDigestBuf, hc.seq[0:], b.data[:recordHeaderLen], b.data[recordHeaderLen+explicitIVLen:], nil) - - n := len(b.data) - b.resize(n + len(mac)) - copy(b.data[n:], mac) - hc.outDigestBuf = mac + mac = hc.mac.MAC(hc.seq[:], record[:recordHeaderLen], payload, nil) } - payload := b.data[recordHeaderLen:] - - // encrypt - if hc.cipher != nil { - switch c := hc.cipher.(type) { - case cipher.Stream: - c.XORKeyStream(payload, payload) - case aead: - payloadLen := len(b.data) - recordHeaderLen - explicitIVLen - b.resize(len(b.data) + c.Overhead()) - nonce := b.data[recordHeaderLen : recordHeaderLen+explicitIVLen] - if len(nonce) == 0 { - nonce = hc.seq[:] - } - payload := b.data[recordHeaderLen+explicitIVLen:] - payload = payload[:payloadLen] - - copy(hc.additionalData[:], hc.seq[:]) - copy(hc.additionalData[8:], b.data[:3]) - hc.additionalData[11] = byte(payloadLen >> 8) - hc.additionalData[12] = byte(payloadLen) - - c.Seal(payload[:0], nonce, payload, hc.additionalData[:]) - case cbcMode: - blockSize := c.BlockSize() - if explicitIVLen > 0 { - c.SetIV(payload[:explicitIVLen]) - payload = payload[explicitIVLen:] - } - prefix, finalBlock := padToBlockSize(payload, blockSize) - b.resize(recordHeaderLen + explicitIVLen + len(prefix) + len(finalBlock)) - c.CryptBlocks(b.data[recordHeaderLen+explicitIVLen:], prefix) - c.CryptBlocks(b.data[recordHeaderLen+explicitIVLen+len(prefix):], finalBlock) - default: - panic("unknown cipher type") + var dst []byte + switch c := hc.cipher.(type) { + case cipher.Stream: + record, dst = sliceForAppend(record, len(payload)+len(mac)) + c.XORKeyStream(dst[:len(payload)], payload) + c.XORKeyStream(dst[len(payload):], mac) + case aead: + nonce := explicitNonce + if len(nonce) == 0 { + nonce = hc.seq[:] } + + copy(hc.additionalData[:], hc.seq[:]) + copy(hc.additionalData[8:], record[:3]) + hc.additionalData[11] = byte(len(payload) >> 8) + hc.additionalData[12] = byte(len(payload)) + + record = c.Seal(record, nonce, payload, hc.additionalData[:]) + case cbcMode: + blockSize := c.BlockSize() + plaintextLen := len(payload) + len(mac) + paddingLen := blockSize - plaintextLen%blockSize + record, dst = sliceForAppend(record, plaintextLen+paddingLen) + copy(dst, payload) + copy(dst[len(payload):], mac) + for i := plaintextLen; i < len(dst); i++ { + dst[i] = byte(paddingLen - 1) + } + if len(explicitNonce) > 0 { + c.SetIV(explicitNonce) + } + c.CryptBlocks(dst, dst) + default: + panic("unknown cipher type") } - // update length to include MAC and any block padding needed. - n := len(b.data) - recordHeaderLen - b.data[3] = byte(n >> 8) - b.data[4] = byte(n) + // Update length to include nonce, MAC and any block padding needed. + n := len(record) - recordHeaderLen + record[3] = byte(n >> 8) + record[4] = byte(n) hc.incSeq() - return true, 0 + return record, nil } -// A block is a simple data buffer. -type block struct { - data []byte - off int // index for Read - link *block -} - -// resize resizes block to be n bytes, growing if necessary. -func (b *block) resize(n int) { - if n > cap(b.data) { - b.reserve(n) - } - b.data = b.data[0:n] -} - -// reserve makes sure that block contains a capacity of at least n bytes. -func (b *block) reserve(n int) { - if cap(b.data) >= n { - return - } - m := cap(b.data) - if m == 0 { - m = 1024 - } - for m < n { - m *= 2 - } - data := make([]byte, len(b.data), m) - copy(data, b.data) - b.data = data -} - -// readFromUntil reads from r into b until b contains at least n bytes -// or else returns an error. -func (b *block) readFromUntil(r io.Reader, n int) error { - // quick case - if len(b.data) >= n { - return nil - } - - // read until have enough. - b.reserve(n) - for { - m, err := r.Read(b.data[len(b.data):cap(b.data)]) - b.data = b.data[0 : len(b.data)+m] - if len(b.data) >= n { - // TODO(bradfitz,agl): slightly suspicious - // that we're throwing away r.Read's err here. - break - } - if err != nil { - return err - } - } - return nil -} - -func (b *block) Read(p []byte) (n int, err error) { - n = copy(p, b.data[b.off:]) - b.off += n - return -} - -// newBlock allocates a new block, from hc's free list if possible. -func (hc *halfConn) newBlock() *block { - b := hc.bfree - if b == nil { - return new(block) - } - hc.bfree = b.link - b.link = nil - b.resize(0) - return b -} - -// freeBlock returns a block to hc's free list. -// The protocol is such that each side only has a block or two on -// its free list at a time, so there's no need to worry about -// trimming the list, etc. -func (hc *halfConn) freeBlock(b *block) { - b.link = hc.bfree - hc.bfree = b -} - -// splitBlock splits a block after the first n bytes, -// returning a block with those n bytes and a -// block with the remainder. the latter may be nil. -func (hc *halfConn) splitBlock(b *block, n int) (*block, *block) { - if len(b.data) <= n { - return b, nil - } - bb := hc.newBlock() - bb.resize(len(b.data) - n) - copy(bb.data, b.data[n:]) - b.data = b.data[0:n] - return b, bb -} - -// RecordHeaderError results when a TLS record header is invalid. +// RecordHeaderError is returned when a TLS record header is invalid. type RecordHeaderError struct { // Msg contains a human readable string that describes the error. Msg string @@ -557,7 +484,7 @@ func (e RecordHeaderError) Error() string { return "tls: " + e.Msg } func (c *Conn) newRecordHeaderError(msg string) (err RecordHeaderError) { err.Msg = msg - copy(err.RecordHeader[:], c.rawInput.data) + copy(err.RecordHeader[:], c.rawInput.Bytes()) return err } @@ -569,40 +496,38 @@ func (c *Conn) readRecord(want recordType) error { // else application data. switch want { default: - c.sendAlert(alertInternalError) - return c.in.setErrorLocked(errors.New("tls: unknown record type requested")) + panic("tls: unknown record type requested") case recordTypeHandshake, recordTypeChangeCipherSpec: if c.handshakeComplete() { - c.sendAlert(alertInternalError) - return c.in.setErrorLocked(errors.New("tls: handshake or ChangeCipherSpec requested while not in handshake")) + panic("tls: handshake or ChangeCipherSpec requested while not in handshake") } case recordTypeApplicationData: if !c.handshakeComplete() { - c.sendAlert(alertInternalError) - return c.in.setErrorLocked(errors.New("tls: application data record requested while in handshake")) + panic("tls: application data record requested while in handshake") } } -Again: - if c.rawInput == nil { - c.rawInput = c.in.newBlock() + // This function modifies c.rawInput, which owns the c.input memory. + if c.input.Len() != 0 { + panic("tls: attempted to read record with pending application data") } - b := c.rawInput + c.input.Reset(nil) // Read header, payload. - if err := b.readFromUntil(c.conn, recordHeaderLen); err != nil { - // RFC suggests that EOF without an alertCloseNotify is - // an error, but popular web sites seem to do this, - // so we can't make it an error. - // if err == io.EOF { - // err = io.ErrUnexpectedEOF - // } + if err := c.readFromUntil(c.conn, recordHeaderLen); err != nil { + // RFC 8446, Section 6.1 suggests that EOF without an alertCloseNotify + // is an error, but popular web sites seem to do this, so we accept it + // if and only if at the record boundary. + if err == io.ErrUnexpectedEOF && c.rawInput.Len() == 0 { + err = io.EOF + } if e, ok := err.(net.Error); !ok || !e.Temporary() { c.in.setErrorLocked(err) } return err } - typ := recordType(b.data[0]) + hdr := c.rawInput.Bytes()[:recordHeaderLen] + typ := recordType(hdr[0]) // No valid TLS record has a type of 0x80, however SSLv2 handshakes // start with a uint16 length where the MSB is set and the first record @@ -613,8 +538,8 @@ Again: return c.in.setErrorLocked(c.newRecordHeaderError("unsupported SSLv2 handshake received")) } - vers := uint16(b.data[1])<<8 | uint16(b.data[2]) - n := int(b.data[3])<<8 | int(b.data[4]) + vers := uint16(hdr[1])<<8 | uint16(hdr[2]) + n := int(hdr[3])<<8 | int(hdr[4]) if c.haveVers && vers != c.vers { c.sendAlert(alertProtocolVersion) msg := fmt.Sprintf("received record with version %x when expecting version %x", vers, c.vers) @@ -635,10 +560,7 @@ Again: return c.in.setErrorLocked(c.newRecordHeaderError("first record does not look like a TLS handshake")) } } - if err := b.readFromUntil(c.conn, recordHeaderLen+n); err != nil { - if err == io.EOF { - err = io.ErrUnexpectedEOF - } + if err := c.readFromUntil(c.conn, recordHeaderLen+n); err != nil { if e, ok := err.(net.Error); !ok || !e.Temporary() { c.in.setErrorLocked(err) } @@ -646,18 +568,13 @@ Again: } // Process message. - b, c.rawInput = c.in.splitBlock(b, recordHeaderLen+n) - ok, off, alertValue := c.in.decrypt(b) - if !ok { - c.in.freeBlock(b) - return c.in.setErrorLocked(c.sendAlert(alertValue)) + record := c.rawInput.Next(recordHeaderLen + n) + data, err := c.in.decrypt(record) + if err != nil { + return c.in.setErrorLocked(c.sendAlert(err.(alert))) } - b.off = off - data := b.data[b.off:] if len(data) > maxPlaintext { - err := c.sendAlert(alertRecordOverflow) - c.in.freeBlock(b) - return c.in.setErrorLocked(err) + return c.in.setErrorLocked(c.sendAlert(alertRecordOverflow)) } if typ != recordTypeAlert && len(data) > 0 { @@ -667,70 +584,97 @@ Again: switch typ { default: - c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) case recordTypeAlert: if len(data) != 2 { - c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) - break + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) } if alert(data[1]) == alertCloseNotify { - c.in.setErrorLocked(io.EOF) - break + return c.in.setErrorLocked(io.EOF) } switch data[0] { case alertLevelWarning: - // drop on the floor - c.in.freeBlock(b) - c.warnCount++ if c.warnCount > maxWarnAlertCount { c.sendAlert(alertUnexpectedMessage) return c.in.setErrorLocked(errors.New("tls: too many warn alerts")) } - - goto Again + return c.readRecord(want) // Drop the record on the floor and retry. case alertLevelError: - c.in.setErrorLocked(&net.OpError{Op: "remote error", Err: alert(data[1])}) + return c.in.setErrorLocked(&net.OpError{Op: "remote error", Err: alert(data[1])}) default: - c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) } case recordTypeChangeCipherSpec: if typ != want || len(data) != 1 || data[0] != 1 { - c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) - break + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) } - // Handshake messages are not allowed to fragment across the CCS + // Handshake messages are not allowed to fragment across the CCS. if c.hand.Len() > 0 { - c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) - break + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) } - err := c.in.changeCipherSpec() - if err != nil { - c.in.setErrorLocked(c.sendAlert(err.(alert))) + if err := c.in.changeCipherSpec(); err != nil { + return c.in.setErrorLocked(c.sendAlert(err.(alert))) } + return nil case recordTypeApplicationData: if typ != want { - c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) - break + return c.in.setErrorLocked(c.sendAlert(alertUnexpectedMessage)) } - c.input = b - b = nil + // Note that data is owned by c.rawInput, following the Next call above, + // to avoid copying the plaintext. This is safe because c.rawInput is + // not read from or written to until c.input is drained. + c.input.Reset(data) + return nil case recordTypeHandshake: - // TODO(rsc): Should at least pick off connection close. if typ != want && !(c.isClient && c.config.Renegotiation != RenegotiateNever) { return c.in.setErrorLocked(c.sendAlert(alertNoRenegotiation)) } c.hand.Write(data) + return nil } +} - if b != nil { - c.in.freeBlock(b) +// atLeastReader reads from R, stopping with EOF once at least N bytes have been +// read. It is different from an io.LimitedReader in that it doesn't cut short +// the last Read call, and in that it considers an early EOF an error. +type atLeastReader struct { + R io.Reader + N int64 +} + +func (r *atLeastReader) Read(p []byte) (int, error) { + if r.N <= 0 { + return 0, io.EOF } - return c.in.err + n, err := r.R.Read(p) + r.N -= int64(n) // won't underflow unless len(p) >= n > 9223372036854775809 + if r.N > 0 && err == io.EOF { + return n, io.ErrUnexpectedEOF + } + if r.N <= 0 && err == nil { + return n, io.EOF + } + return n, err +} + +// readFromUntil reads from r into c.rawInput until c.rawInput contains +// at least n bytes or else returns an error. +func (c *Conn) readFromUntil(r io.Reader, n int) error { + if c.rawInput.Len() >= n { + return nil + } + needs := n - c.rawInput.Len() + // There might be extra input waiting on the wire. Make a best effort + // attempt to fetch it so that it can be used in (*Conn).Read to + // "predict" closeNotify alerts. + c.rawInput.Grow(needs + bytes.MinRead) + _, err := c.rawInput.ReadFrom(&atLeastReader{r, int64(needs)}) + return err } // sendAlert sends a TLS alert message. @@ -789,7 +733,7 @@ const ( // // In the interests of simplicity and determinism, this code does not attempt // to reset the record size once the connection is idle, however. -func (c *Conn) maxPayloadSizeForWrite(typ recordType, explicitIVLen int) int { +func (c *Conn) maxPayloadSizeForWrite(typ recordType) int { if c.config.DynamicRecordSizingDisabled || typ != recordTypeApplicationData { return maxPlaintext } @@ -799,16 +743,11 @@ func (c *Conn) maxPayloadSizeForWrite(typ recordType, explicitIVLen int) int { } // Subtract TLS overheads to get the maximum payload size. - macSize := 0 - if c.out.mac != nil { - macSize = c.out.mac.Size() - } - - payloadBytes := tcpMSSEstimate - recordHeaderLen - explicitIVLen + payloadBytes := tcpMSSEstimate - recordHeaderLen - c.out.explicitNonceLen() if c.out.cipher != nil { switch ciph := c.out.cipher.(type) { case cipher.Stream: - payloadBytes -= macSize + payloadBytes -= c.out.mac.Size() case cipher.AEAD: payloadBytes -= ciph.Overhead() case cbcMode: @@ -818,7 +757,7 @@ func (c *Conn) maxPayloadSizeForWrite(typ recordType, explicitIVLen int) int { payloadBytes = (payloadBytes & ^(blockSize - 1)) - 1 // The MAC is appended before padding so affects the // payload size directly. - payloadBytes -= macSize + payloadBytes -= c.out.mac.Size() default: panic("unknown cipher type") } @@ -864,63 +803,32 @@ func (c *Conn) flush() (int, error) { // writeRecordLocked writes a TLS record with the given type and payload to the // connection and updates the record layer state. func (c *Conn) writeRecordLocked(typ recordType, data []byte) (int, error) { - b := c.out.newBlock() - defer c.out.freeBlock(b) - var n int for len(data) > 0 { - explicitIVLen := 0 - explicitIVIsSeq := false - - var cbc cbcMode - if c.out.version >= VersionTLS11 { - var ok bool - if cbc, ok = c.out.cipher.(cbcMode); ok { - explicitIVLen = cbc.BlockSize() - } - } - if explicitIVLen == 0 { - if c, ok := c.out.cipher.(aead); ok { - explicitIVLen = c.explicitNonceLen() - - // The AES-GCM construction in TLS has an - // explicit nonce so that the nonce can be - // random. However, the nonce is only 8 bytes - // which is too small for a secure, random - // nonce. Therefore we use the sequence number - // as the nonce. - explicitIVIsSeq = explicitIVLen > 0 - } - } m := len(data) - if maxPayload := c.maxPayloadSizeForWrite(typ, explicitIVLen); m > maxPayload { + if maxPayload := c.maxPayloadSizeForWrite(typ); m > maxPayload { m = maxPayload } - b.resize(recordHeaderLen + explicitIVLen + m) - b.data[0] = byte(typ) + + _, c.outBuf = sliceForAppend(c.outBuf[:0], recordHeaderLen) + c.outBuf[0] = byte(typ) vers := c.vers if vers == 0 { // Some TLS servers fail if the record version is // greater than TLS 1.0 for the initial ClientHello. vers = VersionTLS10 } - b.data[1] = byte(vers >> 8) - b.data[2] = byte(vers) - b.data[3] = byte(m >> 8) - b.data[4] = byte(m) - if explicitIVLen > 0 { - explicitIV := b.data[recordHeaderLen : recordHeaderLen+explicitIVLen] - if explicitIVIsSeq { - copy(explicitIV, c.out.seq[:]) - } else { - if _, err := io.ReadFull(c.config.rand(), explicitIV); err != nil { - return n, err - } - } + c.outBuf[1] = byte(vers >> 8) + c.outBuf[2] = byte(vers) + c.outBuf[3] = byte(m >> 8) + c.outBuf[4] = byte(m) + + var err error + c.outBuf, err = c.out.encrypt(c.outBuf, data[:m], c.config.rand()) + if err != nil { + return n, err } - copy(b.data[recordHeaderLen+explicitIVLen:], data) - c.out.encrypt(b, explicitIVLen) - if _, err := c.write(b.data); err != nil { + if _, err := c.write(c.outBuf); err != nil { return n, err } n += m @@ -1124,14 +1032,14 @@ func (c *Conn) handleRenegotiation() error { // Read can be made to time out and return a net.Error with Timeout() == true // after a fixed time limit; see SetDeadline and SetReadDeadline. -func (c *Conn) Read(b []byte) (n int, err error) { - if err = c.Handshake(); err != nil { - return +func (c *Conn) Read(b []byte) (int, error) { + if err := c.Handshake(); err != nil { + return 0, err } if len(b) == 0 { // Put this after Handshake, in case people were calling // Read(nil) for the side effect of the Handshake. - return + return 0, nil } c.in.Lock() @@ -1141,9 +1049,8 @@ func (c *Conn) Read(b []byte) (n int, err error) { // CBC IV. So this loop ignores a limited number of empty records. const maxConsecutiveEmptyRecords = 100 for emptyRecordCount := 0; emptyRecordCount <= maxConsecutiveEmptyRecords; emptyRecordCount++ { - for c.input == nil && c.in.err == nil { + for c.input.Len() == 0 && c.in.err == nil { if err := c.readRecord(recordTypeApplicationData); err != nil { - // Soft error, like EAGAIN return 0, err } if c.hand.Len() > 0 { @@ -1158,33 +1065,24 @@ func (c *Conn) Read(b []byte) (n int, err error) { return 0, err } - n, err = c.input.Read(b) - if c.input.off >= len(c.input.data) { - c.in.freeBlock(c.input) - c.input = nil - } + n, _ := c.input.Read(b) - // If a close-notify alert is waiting, read it so that - // we can return (n, EOF) instead of (n, nil), to signal - // to the HTTP response reading goroutine that the - // connection is now closed. This eliminates a race - // where the HTTP response reading goroutine would - // otherwise not observe the EOF until its next read, - // by which time a client goroutine might have already - // tried to reuse the HTTP connection for a new - // request. - // See https://codereview.appspot.com/76400046 - // and https://golang.org/issue/3514 - if ri := c.rawInput; ri != nil && - n != 0 && err == nil && - c.input == nil && len(ri.data) > 0 && recordType(ri.data[0]) == recordTypeAlert { - if recErr := c.readRecord(recordTypeApplicationData); recErr != nil { - err = recErr // will be io.EOF on closeNotify + // If a close-notify alert is waiting, read it so that we can return (n, + // EOF) instead of (n, nil), to signal to the HTTP response reading + // goroutine that the connection is now closed. This eliminates a race + // where the HTTP response reading goroutine would otherwise not observe + // the EOF until its next read, by which time a client goroutine might + // have already tried to reuse the HTTP connection for a new request. + // See https://golang.org/cl/76400046 and https://golang.org/issue/3514 + if n != 0 && c.input.Len() == 0 && c.rawInput.Len() > 0 && + recordType(c.rawInput.Bytes()[0]) == recordTypeAlert { + if err := c.readRecord(recordTypeApplicationData); err != nil { + return n, err // will be io.EOF on closeNotify } } - if n != 0 || err != nil { - return n, err + if n != 0 { + return n, nil } } diff --git a/src/crypto/tls/tls.go b/src/crypto/tls/tls.go index 8fd4294315..51932882c0 100644 --- a/src/crypto/tls/tls.go +++ b/src/crypto/tls/tls.go @@ -11,6 +11,7 @@ package tls // https://www.imperialviolet.org/2013/02/04/luckythirteen.html. import ( + "bytes" "crypto" "crypto/ecdsa" "crypto/rsa" @@ -29,7 +30,10 @@ import ( // The configuration config must be non-nil and must include // at least one certificate or else set GetCertificate. func Server(conn net.Conn, config *Config) *Conn { - return &Conn{conn: conn, config: config} + return &Conn{ + conn: conn, config: config, + input: *bytes.NewReader(nil), // Issue 28269 + } } // Client returns a new TLS client side connection @@ -37,7 +41,10 @@ func Server(conn net.Conn, config *Config) *Conn { // The config cannot be nil: users must set either ServerName or // InsecureSkipVerify in the config. func Client(conn net.Conn, config *Config) *Conn { - return &Conn{conn: conn, config: config, isClient: true} + return &Conn{ + conn: conn, config: config, isClient: true, + input: *bytes.NewReader(nil), // Issue 28269 + } } // A listener implements a network listener (net.Listener) for TLS connections.