Fixes#71905
Change-Id: I50a418f8552e071c6e5011af5b9accc7d41548d0
Reviewed-on: https://go-review.googlesource.com/c/go/+/651855
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Currently method values aren't correctly handled in Seq because we call
canRangeFunc on the reciever type, not the method value type, when we're
handling a method value. reflect.Value.Type has the logic to obtain the
method value type from the Value.
This change slightly refactors reflect.Value.Type into a separate
function so we can obtain the correct type as an abi.Type and pass it
off to canRangeFunc (and canRangeFunc2).
Fixes#71874.
Change-Id: Ie62dfca2a84b8f2f816bb87ff1ed1a58a7bb8122
Reviewed-on: https://go-review.googlesource.com/c/go/+/651416
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In particular, we apply it only to functions where it is always
a code improvement to inline the call.
We also apply it to some constants.
In a few cases this may introduce a panic statement at the
caller, which is debatable, but making the potential for panic
evident is the purpose of the deprecation.
The gofix analyzer in gopls v0.18 will show a diagnostic for calls
to the annotated functions, and will offer to inline the call.
The new //go:fix annotation needs a special exemption in the
pragma check in the compiler.
Updates #32816
Change-Id: I43bf15648ac12251734109eb7102394f8a76d55e
Reviewed-on: https://go-review.googlesource.com/c/go/+/648995
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Change-Id: I0af1903ed1e4f2bf4ea273847b024520c577ef6d
Reviewed-on: https://go-review.googlesource.com/c/go/+/642496
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mapiterinit allows external linkname. These users must allocate their
own iter struct for initialization by mapiterinit. Since the type is
unexported, they also must define the struct themselves. As a result,
they of course define the struct matching the old hiter definition (in
map_noswiss.go).
The old definition is smaller on 32-bit platforms. On those platforms,
mapiternext will clobber memory outside of the caller's allocation.
On all platforms, the pointer layout between the old hiter and new
maps.Iter does not match. Thus the GC may miss pointers and free
reachable objects early, or it may see non-pointers that look like heap
pointers and throw due to invalid references to free objects.
To avoid these issues, we must keep mapiterinit and mapiternext with the
old hiter definition. The most straightforward way to do this is to use
mapiterinit and mapiternext as a compatibility layer between the old and
new iter types.
The first step to that is to move normal map use off of these functions,
which is what this CL does.
Introduce new mapIterStart and mapIterNext functions that replace the
former functions everywhere in the toolchain. These have the same
behavior as the old functions.
This CL temporarily makes the old functions throw to ensure we don't
have hidden dependencies on them. We cannot remove them entirely because
GOEXPERIMENT=noswissmap still uses the old names, and internal/goobj
requires all builtins to exist regardless of GOEXPERIMENT. The next CL
will introduce the compatibility layer.
I want to avoid using linkname between runtime and reflect, as that
would also allow external linknames. So mapIterStart and mapIterNext are
duplicated in reflect, which can be done trivially, as it imports
internal/runtime/maps.
For #71408.
Change-Id: I6a6a636c6d4bd1392618c67ca648d3f061afe669
Reviewed-on: https://go-review.googlesource.com/c/go/+/643898
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Fixes#70760
Change-Id: Ia00723698b7e502fa2c63f8f1dbe1143af22e0a5
Reviewed-on: https://go-review.googlesource.com/c/go/+/634799
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This finds the bug fixed in CL 630279.
reflect mutates the SwissMapType of a map[unsafe.Pointer]unsafe.Pointer,
which happened to already have the correct GroupSize for all of the maps
used in the reflect tests.
For #54766.
Change-Id: If4428e1e799598e7512edceb3cefb2ad00cfa712
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This was missed in CL 627716.
For #54766.
Change-Id: Ib987efa8abe6e89367e2e1b71a33b64ac6b01b1f
Reviewed-on: https://go-review.googlesource.com/c/go/+/630279
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Instead, have the runtime build the gc bitmaps on demand
at runtime.
Change-Id: If7a245bc62e4bce3ce80972410b0ed307d921abe
Reviewed-on: https://go-review.googlesource.com/c/go/+/616255
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Add all the specialized variants that exist for the existing maps.
Like the existing maps, the fast variants do not support indirect
key/elem.
Note that as of this CL, the Get and Put methods on Map/table are
effectively dead. They are only reachable from the internal/runtime/maps
unit tests.
For #54766.
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Change-Id: I95297750be6200f34ec483e4cfc897f048c26db7
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We use the same heuristics as existing maps.
For #54766.
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Change-Id: I44bb51483cae2c1714717f1b501850fb9e55a39a
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First, skip all the allocation count tests.
In some cases this aligns with existing skips for -race, but in others
we've got new issues. These are debug modes, so some performance loss is
expected, and this is clearly no worse than today where the tests fail.
Next, skip internal linking and static linking tests for msan and asan.
With asan we get an explicit failure that neither are supported by the C
and/or Go compilers. With msan, we only get the Go compiler telling us
internal linking is unavailable. With static linking, we segfault
instead. Filed #70080 to track that.
Next, skip some malloc tests with asan that don't quite work because of
the redzone.
This is because of some sizeclass assumptions that get broken with the
redzone and the fact that the tiny allocator is effectively disabled
(again, due to the redzone).
Next, skip some runtime/pprof tests with asan, because of extra
allocations.
Next, skip some malloc tests with asan that also fail because of extra
allocations.
Next, fix up memstats accounting for arenas when asan is enabled. There
is a bug where more is added to the stats than subtracted. This also
simplifies the accounting a little.
Next, skip race tests with msan or asan enabled; they're mutually
incompatible.
Fixes#70054.
Fixes#64256.
Fixes#64257.
For #70079.
For #70080.
Change-Id: I99c02a0b9d621e44f1f918b307aa4a4944c3ec60
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Use the new SwissTable-based map in internal/runtime/maps as the basis
for the runtime map when GOEXPERIMENT=swissmap.
Integration is complete enough to pass all.bash. Notable missing
features:
* Race integration / concurrent write detection
* Stack-allocated maps
* Specialized "fast" map variants
* Indirect key / elem
For #54766.
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Change-Id: Ie97b656b6d8e05c0403311ae08fef9f51756a639
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Change-Id: Ia0e3d668a2435b2ee72e1c641092445902168e4a
Reviewed-on: https://go-review.googlesource.com/c/go/+/587875
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It makes use of the hiter structure which matches runtime.hiter's.
This change mainly improves the performance of Next method of MapIter.
goos: darwin
goarch: arm64
pkg: reflect
cpu: Apple M2
│ ./old.txt │ ./new.txt │
│ sec/op │ sec/op vs base │
MapIterNext-8 61.95n ± 0% 54.95n ± 0% -11.28% (p=0.000 n=10)
for the change of `test/escape_reflect.go`:
removing mapiterkey, mapiterelem would cause leaking MapIter content
when calling SetIterKey and SetIterValue,
and this may cause map bucket to be allocated on heap instead of stack.
Reproduce:
```
{
m := map[int]int{1: 2} // escapes to heap after this change
it := reflect.ValueOf(m).MapRange()
it.Next()
var k, v int
reflect.ValueOf(&k).Elem().SetIterKey(it)
reflect.ValueOf(&v).Elem().SetIterValue(it)
println(k, v)
}
```
This CL would not introduce abi.NoEscape to fix this. It may need futher
optimization and tests on hiter field usage and its escape analysis.
Fixes#69416
Change-Id: Ibaa33bcf86228070b4a505b9512680791aa59f04
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Use assembler to make runtime.staticuint64s into a readonly array
so that the reflect package can safely create a slice without requiring
any allocation.
Fixes#2320Fixes#68380
Change-Id: If2c97238eca782d0632db265c840581d4ecb9d18
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CL 580779 accidentally committed an un-gofmt-ed all_test.go
Change-Id: I071ad8d8d08cab12032ff8d3eebecb55e808f14a
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Temporary measure to reduce the required MVP code.
For #54766.
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The two map implementations are still identical, but now the compiler
targets the appropriate ABI depending on GOEXPERIMENT.
For #54766.
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The _swiss.go files are identical to the originals (except build tag).
Later CLs will change them.
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Add two tests that verify that MapOf sets the map NeedsKeyUpdate and
HashMightPanic flags in the created map. Missing these flags would cause
correctness issues not otherwise caught in the reflect tests.
For #54766.
Change-Id: Icd5f117e0794e7b4d1b70fa94e5afbe97c4543e3
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The abi.NoEscape function is introduced to replace all usages of
noescape wrapper in the standard library. However, the last usage in
reflect package is still present, because the inlining test failed if
abi.NoEscape were used. The reason is that reflect.noescape is treated
as a cheap call, while abi.NoEscape is not.
By treating abi.NoEscape a cheap call, the last usage of noescape in
reflect package can now be removed.
Change-Id: I798079780129221a5a26cbcb18c95ee30855b784
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Cleanup and friction reduction
For #65355.
Change-Id: Ia14c9dc584a529a35b97801dd3e95b9acc99a511
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Add linknames for most modules with ≥50 dependents.
Add linknames for a few other modules that we know
are important but are below 50.
Remove linknames from badlinkname.go that do not merit
inclusion (very small number of dependents).
We can add them back later if the need arises.
Fixes#67401. (For now.)
Change-Id: I1e49fec0292265256044d64b1841d366c4106002
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Doing this because the slices functions are slightly faster and
slightly easier to use. It also removes one dependency layer.
This CL does not change packages that are used during bootstrap,
as the bootstrap compiler does not have the required slices functions.
It does not change the go/scanner package because the ErrorList
Len, Swap, and Less methods are part of the Go 1 API.
Change-Id: If52899be791c829198e11d2408727720b91ebe8a
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Note that this depends on the revert of CL 581395 to move zeroVal back.
For #67401.
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This reverts CL 581395, commit 2f5b420fb5.
It breaks a linkname from github.com/ugorji/go/codec.
For #67401.
A followup CL will document this dependence.
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Change-Id: Id63ede5d50a8b287bc0b96382f9f3ee6c2e0b834
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CL 585358 adds restrictions to disallow pull-only linknames
(currently off by default). Currently, there are quite some pull-
only linknames in user code in the wild. In order not to break
those, we add push linknames to allow them to be pulled. This CL
includes linknames found in a large code corpus (thanks Matthew
Dempsky and Michael Pratt for the analysis!), that are not
currently linknamed.
Updates #67401.
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To be consistent with other tests.
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See CL 557596, according to the go specification,
the iterated variable type should
be the same as the iterated integer type.
For #66056
Change-Id: I96c87440328c2c50c40d76ecf2f222a331be1ce9
GitHub-Last-Rev: 8f80e401e5
GitHub-Pull-Request: golang/go#67269
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CL 583755 removed all uses of the ifaceIndir function,
and the function itself. Unfortunately, ifaceIndir is accessed
using go:linkname by the popular github.com/goccy/go-json package.
A bug has been filed to fix this upstream:
https://github.com/goccy/go-json/issues/506
Until that bug is fixed and the fix is distributed,
keep this function available.
With luck we can remove this in the 1.24 release.
For #67279
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For #66056
Change-Id: Ib47c07b2527d8213584b72e2575a353f2deaed68
GitHub-Last-Rev: 525a5c3fa4
GitHub-Pull-Request: golang/go#67268
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Fixes#66056
Change-Id: I1e24636e43e68cd57576c39b014e0826fb6c322c
GitHub-Last-Rev: 319ad8ea7c
GitHub-Pull-Request: golang/go#66824
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Reviewed-by: Cherry Mui <cherryyz@google.com>
Use abi.(*Type).IfaceIndir instead.
Change-Id: I31197cbf0edaf53bbb0455fa76d2a4a2ab40b420
GitHub-Last-Rev: 2659b696ef
GitHub-Pull-Request: golang/go#67227
Reviewed-on: https://go-review.googlesource.com/c/go/+/583755
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Change-Id: I0f20020c2929b58958ce228b9f175d5b4fd77a1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/578855
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Russ Cox <rsc@golang.org>
Commit-Queue: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
This makes the reflect package match the compiler for StructOf
with an embedded field.
Fixes#24781
Change-Id: Ice64b167cbe0b9d30a953c5d8e2a86f3ad1158bf
Reviewed-on: https://go-review.googlesource.com/c/go/+/567897
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@golang.org>
Commit-Queue: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
This change defines two commonly-defined functions and a
commonly-defined type in internal/abi to try and deduplicate some
definitions. This is motivated by a follow-up CL which will want access
to TypeOf in yet another package.
There still exist duplicate definitions of all three of these things in
the runtime, and this CL doesn't try to handle that yet. There are far
too many uses in the runtime to handle manually in a way that feels
comfortable; automated refactoring will help.
For #62483.
Change-Id: I02fc64a28f11af618f6071f94d27f45c135fa8ac
Reviewed-on: https://go-review.googlesource.com/c/go/+/573955
Auto-Submit: Michael Knyszek <mknyszek@google.com>
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Reviewed-by: David Chase <drchase@google.com>
CL 516596 changes Value.UnsafePointer to handle String case. However,
the method's doc comment is not updated to reflect this change.
Updates #61308
Change-Id: I84e02fd969ae0244184e1a2f05cac4651cdf7bff
Reviewed-on: https://go-review.googlesource.com/c/go/+/575956
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Fixes#61308
Change-Id: Ic17d737fda055a60779985d5da497745c80d5cfa
Reviewed-on: https://go-review.googlesource.com/c/go/+/516597
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Jes Cok
qiulaidongfeng
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Alan Donovan
Mateusz Poliwczak
Ian Lance Taylor
Michael Pratt
Keith Randall
Youlin Feng
Kyle Xiao
Cuong Manh Le
David Chase
Russ Cox
Cherry Mui
Guoqi Chen
apocelipes
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