Commit Graph

62784 Commits

Author SHA1 Message Date
suntala dfd2396755 Refactor output writer implementation 2025-04-10 09:39:41 +02:00
suntala cf4506e003 Add a new output writer and use it in t.Log
Co-authored-by: Aleks Fazlieva <britishrum@users.noreply.github.com>
2025-04-10 09:39:41 +02:00
Zxilly d60a684c87 cmd/internal/obj/wasm: use i64 for large return addr
Use i64 to avoid overflow when getting PC_F from the return addr.

Fixes #73246

Change-Id: I5683dccf7eada4b8536edf53e2e83116a2f6d943
GitHub-Last-Rev: 267d9a1a03
GitHub-Pull-Request: golang/go#73277
Reviewed-on: https://go-review.googlesource.com/c/go/+/663995
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2025-04-09 23:38:23 -07:00
1911860538 7a82b6a9e1 net/http: initialize Value with File length in cloneMultipartForm
Improve the initialization of the Value map in cloneMultipartForm by
utilizing the length of the File map to optimize memory allocation.

Change-Id: I97ba9e19b2718a75c270e6df21306f4c82656c71
GitHub-Last-Rev: a9683ba9a7
GitHub-Pull-Request: golang/go#69943
Reviewed-on: https://go-review.googlesource.com/c/go/+/621235
Reviewed-by: Christian Ekrem <christianekrem@gmail.com>
Reviewed-by: Sean Liao <sean@liao.dev>
Reviewed-by: qiu laidongfeng2 <2645477756@qq.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Bypass: Dmitri Shuralyov <dmitshur@golang.org>
2025-04-09 17:04:40 -07:00
Dmitrii Martynov a42e337ede runtime: explicitly exclude a potential deadlock in the scheduler
The following sequence in the scheduler may potentially lead to
deadlock:
- globrunqget() -> runqput() -> runqputslow() -> globrunqputbatch()
However, according to the current logic of the scheduler it is not
possible to face the deadlock.

The patch explicitly excludes the deadlock, even though it is impossible
situation at the moment.

Additionally, the "runq" and "globrunq" APIs were partially refactored,
which allowed to minimize the usage of these APIs by each other.
This will prevent situations described in the CL.

Change-Id: I7318f935d285b95522998e0903eaa6193af2ba48
Reviewed-on: https://go-review.googlesource.com/c/go/+/662216
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2025-04-09 16:12:45 -07:00
qiulaidongfeng 8898450841 cmd/go: only print GOCACHE value in env -changed if it's not the default
When other environment variables are set to default values,
we will not print it in go env -changed,
GOCACHE should do the same.

For #69994

Change-Id: I16661803cf1f56dd132b4db1c2d5cb4823fc0e58
Reviewed-on: https://go-review.googlesource.com/c/go/+/621997
Reviewed-by: Sean Liao <sean@liao.dev>
Auto-Submit: Sean Liao <sean@liao.dev>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2025-04-09 13:56:45 -07:00
thepudds 4820816b0d cmd/go/internal/modcmd: remove documentation for auto-converting legacy formats
CL 518776 dropped the ability of 'go mod init' to convert
legacy pre-module dependency configuration files, such as automatically
transforming a Gopkg.lock to a go.mod file with similar requirements,
but some of the documentation remained.

In this CL, we remove it from the cmd/go documentation.
(CL 662675 is a companion change that removes it from the Modules
Reference page).

Updates #71537

Change-Id: Ieccc64c811c4c25a657c00e42f7362a32b5fd661
Reviewed-on: https://go-review.googlesource.com/c/go/+/662695
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Sean Liao <sean@liao.dev>
Auto-Submit: Sean Liao <sean@liao.dev>
2025-04-09 13:53:22 -07:00
Jakob Ackermann cfb78d63bd net/http: reduce memory usage when hijacking
Previously, Hijack allocated a new write buffer and the existing
connection write buffer used an extra 4KiB of memory until the handler
finished and the "conn" was garbage collected. Now, hijack re-uses the
existing write buffer and re-attaches it to the raw connection to avoid
referencing the net/http "conn" after returning.

After a handler that hijacked exited, the "conn" reference in
"connReader" will now be unset. This allows all of the "conn",
"response" and "Request" to get garbage collected.
Overall, this is reducing the memory usage by 43% or 6.7KiB per hijacked
connection (see BenchmarkServerHijackMemoryUsage in an earlier revision
of the CL).

CloseNotify will continue to work _before_ the handler has exited
(i.e. while the "conn" is still referenced in "connReader"). This aligns
with the documentation of CloseNotifier:
> After the Handler has returned, there is no guarantee that the channel
> receives a value.

goos: linux
goarch: amd64
pkg: net/http
cpu: Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz
               │   before    │             after              │
               │   sec/op    │    sec/op     vs base          │
ServerHijack-8   42.59µ ± 8%   39.47µ ± 16%  ~ (p=0.481 n=10)

               │    before    │                after                 │
               │     B/op     │     B/op      vs base                │
ServerHijack-8   16.12Ki ± 0%   12.06Ki ± 0%  -25.16% (p=0.000 n=10)

               │   before   │               after               │
               │ allocs/op  │ allocs/op   vs base               │
ServerHijack-8   51.00 ± 0%   49.00 ± 0%  -3.92% (p=0.000 n=10)

Change-Id: I20a37ee314ed0d47463a4657d712154e78e48138
GitHub-Last-Rev: 80f09dfa27
GitHub-Pull-Request: golang/go#70756
Reviewed-on: https://go-review.googlesource.com/c/go/+/634855
Reviewed-by: Sean Liao <sean@liao.dev>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Sean Liao <sean@liao.dev>
2025-04-09 13:49:52 -07:00
qmuntal cac276f81a internal/poll: fix race in Close
There is a potential race between a concurrent call to FD.initIO, which
calls FD.pd.init, and a call to FD.Close, which calls FD.pd.evict.

This is solved by calling FD.initIO in FD.Close, as that will block
until the concurrent FD.initIO has completed. Note that FD.initIO is
no-op if first called from here.

The race window is so small that it is not possible to write a test
that triggers it.

Change-Id: Ie2f2818e746b9d626fe3b9eb6b8ff967c81ef863
Reviewed-on: https://go-review.googlesource.com/c/go/+/663815
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
2025-04-09 13:07:09 -07:00
qmuntal 7007dfcd0c os: clean-up NewFile tests
This CL removes some unnecessary code and duplicated NewFile tests
cases.

It also simplifies TestPipeCanceled by removing the need for using
SetReadDeadline. Using CancelIoEx instead of CancelIo makes the cancel
operations to finish almost instantly. The latter could take more than
20s to finish if called from a thread different from the one that
called ReadFile.

Change-Id: I9033cbcad277666bc2aec89b3e5a3ef529da2cd8
Reviewed-on: https://go-review.googlesource.com/c/go/+/663755
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2025-04-09 13:06:17 -07:00
limeidan 09d76e59d2 cmd/compile: set unalignedOK to make memcombine work properly on loong64
goos: linux
goarch: loong64
pkg: unicode/utf8
cpu: Loongson-3A6000-HV @ 2500.00MHz
                            │     old     │                 new                 │
                            │   sec/op    │   sec/op     vs base                │
ValidTenASCIIChars            7.604n ± 0%   6.805n ± 0%  -10.51% (p=0.000 n=10)
Valid100KASCIIChars           37.41µ ± 0%   16.58µ ± 0%  -55.67% (p=0.000 n=10)
ValidTenJapaneseChars         60.84n ± 0%   58.62n ± 0%   -3.64% (p=0.000 n=10)
ValidLongMostlyASCII          113.5µ ± 0%   113.5µ ± 0%        ~ (p=0.303 n=10)
ValidLongJapanese             204.6µ ± 0%   206.8µ ± 0%   +1.07% (p=0.000 n=10)
ValidStringTenASCIIChars      7.604n ± 0%   6.803n ± 0%  -10.53% (p=0.000 n=10)
ValidString100KASCIIChars     38.05µ ± 0%   17.14µ ± 0%  -54.97% (p=0.000 n=10)
ValidStringTenJapaneseChars   60.58n ± 0%   59.48n ± 0%   -1.82% (p=0.000 n=10)
ValidStringLongMostlyASCII    113.5µ ± 0%   113.4µ ± 0%   -0.10% (p=0.000 n=10)
ValidStringLongJapanese       205.9µ ± 0%   207.3µ ± 0%   +0.67% (p=0.000 n=10)
geomean                       3.324µ        2.756µ       -17.08%

Change-Id: Id43b6e2e41907bd4b92f421dacde31f048db47d6
Reviewed-on: https://go-review.googlesource.com/c/go/+/662495
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: Keith Randall <khr@google.com>
2025-04-09 09:18:20 -07:00
David Chase ecc06f0db7 cmd/compile: fix the test for ABI specification so it works right w/ generics
Change-Id: I09ef615bfe69a30fa8f7eef5f0a8ff94a244c920
Reviewed-on: https://go-review.googlesource.com/c/go/+/663776
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-04-09 00:32:10 -07:00
Keith Randall 0909bcd9e4 syscall: remove unused windows function
It's causing the dependency test to fail.

Fixes #73274

Change-Id: I7d80ea4872e360c16ac3b77acf15fa2660d117b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/663975
Auto-Submit: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
2025-04-08 17:13:04 -07:00
Neal Patel 53badd4836 net/http: push roundTrip panic higher in the stack
If Transport is a non-nil interface pointing to a nil implementer,
then a panic inside of roundTrip further obsfucates the issue.

Change-Id: I47664b8e6185c5f56b5e529f49022484b5ea1d94
Reviewed-on: https://go-review.googlesource.com/c/go/+/661897
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Neal Patel <nealpatel@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
2025-04-08 14:27:47 -07:00
Damien Neil ec4a9fb321 context: don't return a nil Cause for a canceled custom context
Avoid a case where Cause(ctx) could return nil for a canceled context,
when ctx is a custom context implementation and descends from a
cancellable-but-not-canceled first-party Context.

Fixes #73258

Change-Id: Idbd81ccddea82ecabece4373d718baae6ca4b58e
Reviewed-on: https://go-review.googlesource.com/c/go/+/663936
Reviewed-by: Alan Donovan <adonovan@google.com>
Auto-Submit: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-04-08 14:04:56 -07:00
cuishuang 3acd440219 time: add examples for AppendBinary and AppendText
Change-Id: I61529b5162f8a77d3bbffcbbac98c834a7626e3a
Reviewed-on: https://go-review.googlesource.com/c/go/+/661935
Reviewed-by: Sean Liao <sean@liao.dev>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Sean Liao <sean@liao.dev>
Reviewed-by: Carlos Amedee <carlos@golang.org>
2025-04-08 13:59:46 -07:00
Alan Donovan 8433412b74 go/types: document that Defs[id] may be missing in ill-typed code
Updates #70968

Change-Id: Id0a4acd6bad917ba8a5c439625bca14469b6eb7c
Reviewed-on: https://go-review.googlesource.com/c/go/+/663895
Auto-Submit: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Commit-Queue: Alan Donovan <adonovan@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
2025-04-08 13:26:21 -07:00
Mark Freeman 559b5d814f go/types, types2: fix failing error message test for s390x
Fixes #73206.

Change-Id: If27ce5fe7aa71415b6e2d525c78b1f04b88a308b
Reviewed-on: https://go-review.googlesource.com/c/go/+/663635
TryBot-Result: Gopher Robot <gobot@golang.org>
TryBot-Bypass: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Mark Freeman <mark@golang.org>
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2025-04-08 08:25:47 -07:00
qmuntal 3a4f077710 syscall: fix dangling pointers in Windows' process attributes
Windows' _PROC_THREAD_ATTRIBUTE_LIST can contain pointers to memory
owned by Go, but the GC is not aware of this. This can lead to the
memory being freed while the _PROC_THREAD_ATTRIBUTE_LIST is still in
use.

This CL uses the same approach as in x/sys/windows to ensure that the
attributes are not collected by the GC.

Fixes #73170.
Updates #73199.

Cq-Include-Trybots: luci.golang.try:gotip-windows-amd64-longtest
Change-Id: I7dca8d386aed4c02fdcd4a631d0fa4dc5747a96f
Reviewed-on: https://go-review.googlesource.com/c/go/+/663715
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Reviewed-by: Keith Randall <khr@google.com>
2025-04-08 07:56:17 -07:00
Mateusz Poliwczak 58b6891108 go/ast: don't MergeLine in SortImports when last import on the same line as RParen
Fixes #69183

Change-Id: I8b78dadaa8ba91e74ea2bfc21abd6abe72b7e38b
GitHub-Last-Rev: 1a41f9e8e3
GitHub-Pull-Request: golang/go#69187
Reviewed-on: https://go-review.googlesource.com/c/go/+/610035
Reviewed-by: Alan Donovan <adonovan@google.com>
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2025-04-08 07:56:01 -07:00
apocelipes 38a2a3c7ce runtime: use internal/byteorder
To simplify the code.

Change-Id: Ib1af5009cc25bb29fd26fdb7b29ff4579f0150aa
GitHub-Last-Rev: f698a8a771
GitHub-Pull-Request: golang/go#73255
Reviewed-on: https://go-review.googlesource.com/c/go/+/663735
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-04-08 07:47:16 -07:00
Mateusz Poliwczak 14b15a2bea internal/runtime/maps: pass proper func PC to race.WritePC/race.ReadPC
Fixes #73191

Change-Id: I0f8a5a19faa745943a98476c7caf4c97ccdce184
Reviewed-on: https://go-review.googlesource.com/c/go/+/663175
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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2025-04-08 06:12:47 -07:00
Keith Randall af278bfb1f cmd/compile: add additional flag constant folding rules
Fixes #73200

Change-Id: I77518d37acd838acf79ed113194bac5e2c30897f
Reviewed-on: https://go-review.googlesource.com/c/go/+/663535
Reviewed-by: David Chase <drchase@google.com>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2025-04-07 22:48:32 -07:00
Brad Fitzpatrick 92309ff771 doc/next: fix link
It was rendering incorrectly at https://tip.golang.org/doc/go1.25

Change-Id: I2f66c95414ac5d71b9b02b91bcdc0d0a87b3f605
Reviewed-on: https://go-review.googlesource.com/c/go/+/662436
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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Reviewed-by: Carlos Amedee <carlos@golang.org>
2025-04-07 13:59:43 -07:00
zhi.wang 8054d2da5b strconv: use switch for '+'/'-' prefix handling
Follow the approach used in strconv's readFloat, decimal.set, and Atoi,
where leading '+' and '-' are handled using a switch for clarity and
consistency.

Change-Id: I41eff34ce90b5ac43fcdbc0bb88910d6d5fb4d39
GitHub-Last-Rev: 0c9d2efb5a
GitHub-Pull-Request: golang/go#73185
Reviewed-on: https://go-review.googlesource.com/c/go/+/663257
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2025-04-07 13:36:46 -07:00
abemotion b2819d13db net/http: add link to types
Some types are not linked.
This change adds a link to each type.

Change-Id: Id46fb64a74efb851ed76e4136f15e8fd9e445bb7
Reviewed-on: https://go-review.googlesource.com/c/go/+/663075
Reviewed-by: Damien Neil <dneil@google.com>
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2025-04-07 13:35:49 -07:00
Mateusz Poliwczak ffe47d9789 go/ast: move sortimports test directly to go/ast
For some reason i have created a separate package instead
of using _test package. Let's move this test where it belongs.

Change-Id: Ib569ca433de1ef4e161b9d334125648e00b7d3c4
Reviewed-on: https://go-review.googlesource.com/c/go/+/663555
Auto-Submit: Alan Donovan <adonovan@google.com>
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Reviewed-by: Alan Donovan <adonovan@google.com>
2025-04-07 13:34:20 -07:00
cuishuang 465097b2b5 all: use built-in max/min to simplify the code
Change-Id: I309d93d6ebf0feb462217a344d5f02c190220752
Reviewed-on: https://go-review.googlesource.com/c/go/+/661737
Reviewed-by: Sean Liao <sean@liao.dev>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-04-07 12:59:28 -07:00
Sam Thanawalla d584d2b3dd cmd/go: fix version stamping for v2 modules and subdirectories
We were not passing the module path to newCodeRepo which caused it to
incorrectly parse the major version. This allowed v0 and v1 modules to
work because an empty major version is allowed in that case.

Additionally we need to pass the root module path to derive the correct tag
for subdirectories.

Fixes: #72877
Fixes: #71738
Change-Id: Id792923f426858513972e713623270edbc76c545
Reviewed-on: https://go-review.googlesource.com/c/go/+/661875
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
2025-04-07 11:29:57 -07:00
Carlos Amedee a08d2db6d1 doc/go1.25: document macOS requirements
For #69839.
For #71661.

Change-Id: Ic13f4b7fb81461d55216b260384ee10037b86054
Reviewed-on: https://go-review.googlesource.com/c/go/+/663515
TryBot-Bypass: Dmitri Shuralyov <dmitshur@golang.org>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2025-04-07 11:04:56 -07:00
Richard Miller adb29670fc runtime: protect plan9 time_now function with !faketime build tag
The introduction of monotonic time support for Plan 9 in CL 656755
causes a build error with multiple declaration of time_now when
built with tag faketime. Correct this by moving function time_now
into its own source file with !faketime build tag.

Fixes #73169

Change-Id: Id7a9a1c77e286511e25546089681f2f88a9538bb
Reviewed-on: https://go-review.googlesource.com/c/go/+/662856
Reviewed-by: Austin Clements <austin@google.com>
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2025-04-07 09:53:44 -07:00
Xin Hao 20a924fe87 log/slog: make examples playable
Fixes #69246

Change-Id: I8e59132980404ee58ba2ca8718dd9f68404fdf8d
GitHub-Last-Rev: f59d3fad20
GitHub-Pull-Request: golang/go#69249
Reviewed-on: https://go-review.googlesource.com/c/go/+/610535
Reviewed-by: Sean Liao <sean@liao.dev>
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2025-04-07 09:34:01 -07:00
Nicola Murino 3046b49991 crypto/tls: add offered cipher suites to the handshake error
This change makes debugging easier if the server handshake fails because
the client only offers unsupported algorithms.

Change-Id: I7daac173a16af2e073aec3d9b59709560f540c6f
Reviewed-on: https://go-review.googlesource.com/c/go/+/631555
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Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Auto-Submit: Nicola Murino <nicola.murino@gmail.com>
2025-04-07 09:32:45 -07:00
Dimitri John Ledkov a6e7445457 cmd/go/internal/load: join incompatible and dirty build specifiers with .
Change "+incompatible+dirty" version to be "+incompatible.dirty" such
that it is SemVer spec compatible.

Fixes #71971

Change-Id: I714ffb3f1ad88c793656c3652367db34739a2144
Reviewed-on: https://go-review.googlesource.com/c/go/+/652955
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Reviewed-by: Michael Matloob <matloob@golang.org>
2025-04-07 07:58:05 -07:00
Sam Thanawalla e8adc39332 cmd/go: fix GOAUTH parsing for trailing slash
We were treating a url with a trailing slash differently than one
without. This CL treats them the same.

Additionally this fixes a bug in the way we iteratively try different
prefixes. We were only trying the host url but this change now tries all
different prefixes.

Fixes: #71889
Change-Id: I5d5f43000ae0e18ea8682050037253aff75ec142
Reviewed-on: https://go-review.googlesource.com/c/go/+/662435
Reviewed-by: Michael Matloob <matloob@golang.org>
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2025-04-07 07:33:33 -07:00
Keith Randall 16dbd2be39 cmd/compile: be more conservative about arm64 insns that can take zero register
It's really only needed for stores and store-like instructions
(atomic exchange, compare-and-swap, ...).

Fixes #73180

Change-Id: I8ecd833a301355adf0fa4bff43250091640c6226
Reviewed-on: https://go-review.googlesource.com/c/go/+/663155
Reviewed-by: Cherry Mui <cherryyz@google.com>
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2025-04-06 19:11:43 -07:00
cuishuang 6fd9ee3da9 all: use slices.Equal to simplify code
Change-Id: Ib3be7cee6ca6dce899805aac176ca789eb2fd0f1
Reviewed-on: https://go-review.googlesource.com/c/go/+/661738
Reviewed-by: Carlos Amedee <carlos@golang.org>
Auto-Submit: Sean Liao <sean@liao.dev>
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2025-04-06 09:36:41 -07:00
Keith Randall 1647896aa2 cmd/compile: on 32-bit, bump up align for values that may contain 64-bit fields
On 32-bit systems, these need to be aligned to 8 bytes, even though the
typechecker doesn't tell us that.

The 64-bit allocations might be the target of atomic operations
that require 64-bit alignment.

Fixes 386 longtest builder.

Fixes #73173

Change-Id: I68f6a4f40c7051d29c57ecd560c8d920876a56a6
Reviewed-on: https://go-review.googlesource.com/c/go/+/663015
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2025-04-04 23:25:15 -07:00
khr@golang.org e373771490 cmd/compile: use zero register instead of specialized *zero instructions
This lets us get rid of lots of specialized opcodes for storing zero.
Instead, use regular store opcodes that just happen to use the zero
register as one of their inputs.

Change-Id: I2902a6f9b0831cb598df45189ca6bb57221bef72
Reviewed-on: https://go-review.googlesource.com/c/go/+/633075
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2025-04-04 15:26:24 -07:00
Keith Randall 2d050e91a3 cmd/compile: allow pointer-containing elements in stack allocations
For variable-sized allocations.

Turns out that we already implement the correct escape semantics
for this case. Even when the result of the "make" does not escape,
everything assigned into it does.

Change-Id: Ia123c538d39f2f1e1581c24e4135a65af3821c5e
Reviewed-on: https://go-review.googlesource.com/c/go/+/657937
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2025-04-04 15:04:34 -07:00
qmuntal 7e60bdd7aa os: support overlapped IO with NewFile
The runtime/poll package has just gained support for overlapped IO,
see CL 660595 and CL 661955. The only remaining piece was making it
visible to user code via os.NewFile.

Some of the poll.FD.Init responsibility has been moved to os.NewFile
to avoid unnecessary syscalls for the common case of using os.Open,
os.Create, os.OpenFile, and os.Pipe, where we know that the file
is not opened for overlapped IO.

Some internal/poll tests have been moved to the os package to exercise
public APIs rather than internal ones.

The os.NewFile function definition has been moved into an OS-agnostic
file to avoid having duplicated documentation and ensure that the
caller is aware of its behavior across all platforms.

Closes #19098.

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Change-Id: If043f8b34d588cd4b481777203107ed92d660fd9
Reviewed-on: https://go-review.googlesource.com/c/go/+/662236
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2025-04-04 14:00:21 -07:00
Keith Randall 5fc596ebe7 cmd/compile: aggregate scalar allocations for heap escapes
If multiple small scalars escape to the heap, allocate them together
with a single allocation. They are going to be aggregated together
in the tiny allocator anyway, might as well do just one runtime call.

Change-Id: I4317e29235af63de378a26436a18d7fb0c39e41f
Reviewed-on: https://go-review.googlesource.com/c/go/+/648536
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2025-04-04 10:53:05 -07:00
qmuntal 6839e71d82 internal/syscall/windows: use unsafe.Pointer instead of uintptr
Some functions accept a uintptr when they should accept an
unsafe.Pointer, else the compiler won't know that the pointer should
be kept alive across the call, potentially causing undefined behavior.

Fixes #73156 (potentially)

Change-Id: I29c847eb8ffbb785fabf217e9f3718d10cfb5047
Reviewed-on: https://go-review.googlesource.com/c/go/+/662855
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Reviewed-by: Alan Donovan <adonovan@google.com>
Auto-Submit: Damien Neil <dneil@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
2025-04-04 10:40:19 -07:00
Keith Randall 7a427143b6 cmd/compile: stack allocate variable-sized makeslice
Instead of always allocating variable-sized "make" calls on the heap,
allocate a small, constant-sized array on the stack and use that array
as the backing store if it is big enough.

Requires the result of the "make" doesn't escape.

  if cap <= K {
      var arr [K]E
      slice = arr[:len:cap]
  } else {
      slice = makeslice(E, len, cap)
  }

Pretty conservatively for now, K = 32/sizeof(E). The slice header is
already 24 bytes, so wasting 32 bytes of stack if the requested size
is too big isn't that bad. Larger would waste more stack space but
maybe avoid more allocations.

This CL also requires the element type be pointer-free.  Maybe we
could relax that at some point, but it is hard. If the element type
has pointers we can get heap->stack pointers (in the case where the
requested size is too big and the slice is heap allocated).

Note that this only handles the case of makeslice called directly from
compiler-generated code. It does not handle slices built in the
runtime on behalf of the program (e.g. in growslice). Some of those
are currently handled by passing in a tmpBuf (e.g. concatstrings),
but we could probably do more.

Change-Id: I8378efad527cd00d25948a80b82a68d88fbd93a1
Reviewed-on: https://go-review.googlesource.com/c/go/+/653856
Reviewed-by: Robert Griesemer <gri@google.com>
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2025-04-04 10:36:58 -07:00
Alexander Musman 16a6b71f18 cmd/compile: improve store-to-load forwarding with compatible types
Improve the compiler's store-to-load forwarding optimization by relaxing the
type comparison condition. Instead of requiring exact type equality (CMPeq),
we now use copyCompatibleType which allows forwarding between compatible
types where safe.

Fix several size comparison bugs in the nested store patterns. Previously,
we were comparing the size of the outer store with the load type,
rather than comparing with the size of the actual store being forwarded
from.

Skip OpConvert in dead store elimination to help get rid of dead stores such
as zeroing slices. OpConvert, like OpInlMark, doesn't really use the memory.

This optimization is particularly beneficial for code that creates slices with
computed pointers, such as the runtime's heapBitsSlice function, where
intermediate calculations were previously causing the compiler to miss
store-to-load forwarding opportunities.

Local sweet run result on an x86_64 laptop:

                       │  Orig.res   │              Hopt.res              │
                       │   sec/op    │   sec/op     vs base               │
BiogoIgor-8               5.303 ± 1%    5.322 ± 1%       ~ (p=0.190 n=10)
BiogoKrishna-8            7.894 ± 1%    7.828 ± 2%       ~ (p=0.190 n=10)
BleveIndexBatch100-8      2.257 ± 1%    2.248 ± 2%       ~ (p=0.529 n=10)
EtcdPut-8                30.12m ± 1%   30.03m ± 1%       ~ (p=0.796 n=10)
EtcdSTM-8                127.1m ± 1%   126.2m ± 0%  -0.74% (p=0.023 n=10)
GoBuildKubelet-8          52.21 ± 0%    52.05 ± 1%       ~ (p=0.063 n=10)
GoBuildKubeletLink-8      4.342 ± 1%    4.305 ± 0%  -0.85% (p=0.000 n=10)
GoBuildIstioctl-8         43.33 ± 0%    43.24 ± 0%  -0.22% (p=0.015 n=10)
GoBuildIstioctlLink-8     4.604 ± 1%    4.598 ± 0%       ~ (p=0.063 n=10)
GoBuildFrontend-8         15.33 ± 0%    15.29 ± 0%       ~ (p=0.143 n=10)
GoBuildFrontendLink-8    740.0m ± 1%   737.7m ± 1%       ~ (p=0.912 n=10)
GopherLuaKNucleotide-8    9.590 ± 1%    9.656 ± 1%       ~ (p=0.165 n=10)
MarkdownRenderXHTML-8    96.97m ± 1%   97.26m ± 2%       ~ (p=0.105 n=10)
Tile38QueryLoad-8        335.9µ ± 1%   335.6µ ± 1%       ~ (p=0.481 n=10)
geomean                   1.336         1.333       -0.22%

Change-Id: I031552623e6d5a3b1b5be8325e6314706e45534f
Reviewed-on: https://go-review.googlesource.com/c/go/+/662075
Reviewed-by: Carlos Amedee <carlos@golang.org>
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Reviewed-by: Keith Randall <khr@golang.org>
2025-04-04 08:25:47 -07:00
qiulaidongfeng 822031dffc sync: add WaitGroup.Go
Fixes #63796

Change-Id: I2a941275dd64ef858cbf02d31a759fdc5c082ceb
Reviewed-on: https://go-review.googlesource.com/c/go/+/662635
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Reviewed-by: Carlos Amedee <carlos@golang.org>
2025-04-04 08:19:32 -07:00
qmuntal d164776615 internal/poll: simplify execIO
execIO has multiple return paths and multiple places where error is
mangled. This CL simplifies the function by just having one return
path.

Some more tests have been added to ensure that the error handling
is done correctly.

Updates #19098.

Change-Id: Ida0b1e85d4d123914054306e5bef8da94408b91c
Reviewed-on: https://go-review.googlesource.com/c/go/+/662215
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2025-04-04 08:09:07 -07:00
Michael Pratt 8969771cc3 runtime: add thread exit plus vgetrandom stress test
Add a regression test similar to the reproducer from #73141 to try to
help catch future issues with vgetrandom and thread exit. Though the
test isn't very precise, it just hammers thread exit.

When the test reproduces #73141, it simply crashes with a SIGSEGV and no
output or stack trace, which would be very unfortunate on a builder.
https://go.dev/issue/49165 tracks collecting core dumps from builders,
which would make this more tractable to debug.

For #73141.

Change-Id: I6a6a636c7d7b41e2729ff6ceb30fd7f979aa9978
Reviewed-on: https://go-review.googlesource.com/c/go/+/662636
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2025-04-04 06:37:49 -07:00
Mark Freeman 5eaeb7b455 go/types, types2: better error messages for invalid qualified identifiers
This change borrows code from CL 631356 by Emmanuel Odeke (thanks!).

Fixes #70549.

Change-Id: Id6f794ea2a95b4297999456f22c6e02890fce13b
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2025-04-03 15:36:36 -07:00
thepudds ab2926291b testing: clarify how B.Loop avoids optimizing away all the useful work
As discussed in #73137, we want to clarify the description of how
B.Loop avoids surprising optimizations, while also hinting that
the exact approach might change in the future.

Updates #73137

Change-Id: I8536540cd5d79804a47fba8cd6eec3821864309d
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2025-04-03 12:24:34 -07:00