Commit Graph

63309 Commits

Author SHA1 Message Date
Alan Donovan e9d3b030ed slices,sort: explicitly discard results in benchmarks
The unusedresult analyzer will report failure to use the results
of these pure functions.

Updates #73950

Change-Id: I783cb92ad913105afd46c782bedf6234410c645d
Reviewed-on: https://go-review.googlesource.com/c/go/+/677995
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Commit-Queue: Alan Donovan <adonovan@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-06-02 09:09:25 -07:00
Carlos Amedee a8e99ab19c internal/trace: expose the go version read by the reader
This change adds a function to expose the version set by the trace
reader after reading the trace header (in tests). The trace validator
needs to be able to determine what version of the trace it needs to
validate against. Clock snapshot checks have been disabled for
Windows and WASM.

For #63185

Change-Id: Ia3d63e6ed7a5ecd87e63292b84cc417d982aaa5a
Reviewed-on: https://go-review.googlesource.com/c/go/+/677695
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Carlos Amedee <carlos@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2025-05-30 14:51:22 -07:00
Michael Matloob 68b51e99f9 cmd/distpack: add test case for pack tool being excluded
For #71867

Change-Id: Ic4c6304b9a6b35c45bf35342523930924c68545a
Reviewed-on: https://go-review.googlesource.com/c/go/+/677635
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Matloob <matloob@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2025-05-30 14:41:17 -07:00
Michael Matloob 67f052121e cmd/distpack: don't keep the pack tool
This was an oversight: the pack tool isn't actually used in builds.

For #71867

Change-Id: Ib1f1cce0b574cf1d2c1002b2f2ab9ef9d750d0fb
Reviewed-on: https://go-review.googlesource.com/c/go/+/677557
Reviewed-by: Michael Matloob <matloob@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2025-05-30 12:23:27 -07:00
Carlos Amedee 1947c4233a runtime: set HeapGoal to zero when the GC is disabled
When the GC is disabled, the tracer should emit a heap goal of 0. Not
setting the heap goal to 0 causes an inaccurate NextGC value to be
emmited.

Fixes #63864

Change-Id: Iecceaca86c0a43c1cc4d9433f1f9bb736f01ccbc
Reviewed-on: https://go-review.googlesource.com/c/go/+/639417
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
2025-05-30 11:29:03 -07:00
Damien Neil 8cd7f17248 testing, testing/synctest: report correct duration after panics
Report the correct wall-clock test duration after handling a
panic in a synctest.Test bubble.

Fixes #73852

Change-Id: I053262e5eac2dd9d5938b17c3093cbc3fa115a0d
Reviewed-on: https://go-review.googlesource.com/c/go/+/676695
Auto-Submit: Damien Neil <dneil@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-05-30 09:23:37 -07:00
Roxy Light 29782bd347 os: add implementation of fs.ReadLinkFS to *rootFS
Fixes #73887

Change-Id: I43f3f4324d740b5381615bce864b7ec31415a635
Reviewed-on: https://go-review.googlesource.com/c/go/+/676135
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>
2025-05-30 09:23:09 -07:00
Mark Freeman 78e86297f5 cmd/compile/internal/noder: rename RelIndex to match codebase
Change-Id: I06b64ea3c1c02b46e242852f8f0b56d77df42161
Reviewed-on: https://go-review.googlesource.com/c/go/+/677236
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Mark Freeman <mark@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
2025-05-29 21:19:36 -07:00
Cherry Mui fece9871bb cmd/compile: update default PGO profile
Since last time the default.pgo profile is collected, there has
been a lot of development in the compiler. It's time to refresh
the compiler's PGO profile.

Profile collected by running the cmd/compile/profile.sh script on
the gotip-linux-amd64_c3h88-perf_vs_release gomote.

Benchmark results on Linux/AMD64:

         │  nopgo.txt  │              old.txt               │              new.txt               │
         │   sec/op    │   sec/op     vs base               │   sec/op     vs base               │
Template   110.4m ± 2%   108.4m ± 1%       ~ (p=0.121 n=20)   107.8m ± 1%  -2.37% (p=0.006 n=20)
Unicode    98.78m ± 0%   95.16m ± 1%  -3.67% (p=0.000 n=20)   93.87m ± 1%  -4.98% (p=0.000 n=20)
GoTypes    553.8m ± 0%   548.3m ± 0%  -0.99% (p=0.000 n=20)   542.1m ± 0%  -2.11% (p=0.000 n=20)
Compiler   88.12m ± 1%   83.22m ± 1%  -5.56% (p=0.000 n=20)   81.81m ± 1%  -7.17% (p=0.000 n=20)
SSA         3.592 ± 1%    3.499 ± 0%  -2.58% (p=0.000 n=20)    3.445 ± 0%  -4.08% (p=0.000 n=20)
Flate      64.48m ± 1%   64.99m ± 1%       ~ (p=0.341 n=20)   63.10m ± 2%  -2.15% (p=0.000 n=20)
GoParser   129.8m ± 1%   127.3m ± 1%  -1.88% (p=0.004 n=20)   126.2m ± 1%  -2.75% (p=0.000 n=20)
Reflect    286.0m ± 1%   282.3m ± 1%  -1.30% (p=0.000 n=20)   280.1m ± 1%  -2.06% (p=0.000 n=20)
Tar        129.3m ± 1%   128.4m ± 2%       ~ (p=0.565 n=20)   126.3m ± 1%  -2.32% (p=0.000 n=20)
XML        152.1m ± 1%   148.2m ± 1%  -2.55% (p=0.000 n=20)   147.9m ± 1%  -2.79% (p=0.000 n=20)
geomean    197.4m        193.4m       -2.04%                  190.9m       -3.29%

On Linux/ARM64:

         │  nopgo.txt  │              old.txt               │              new.txt               │
         │   sec/op    │   sec/op     vs base               │   sec/op     vs base               │
Template   80.78m ± 2%   78.78m ± 1%  -2.47% (p=0.000 n=20)   78.15m ± 1%  -3.25% (p=0.000 n=20)
Unicode    80.57m ± 1%   75.79m ± 1%  -5.94% (p=0.000 n=20)   74.85m ± 0%  -7.11% (p=0.000 n=20)
GoTypes    426.4m ± 0%   416.1m ± 0%  -2.42% (p=0.000 n=20)   411.0m ± 0%  -3.62% (p=0.000 n=20)
Compiler   66.54m ± 1%   64.01m ± 1%  -3.79% (p=0.000 n=20)   62.86m ± 1%  -5.53% (p=0.000 n=20)
SSA         2.905 ± 0%    2.772 ± 0%  -4.56% (p=0.000 n=20)    2.759 ± 0%  -5.01% (p=0.000 n=20)
Flate      46.68m ± 0%   45.40m ± 1%  -2.75% (p=0.000 n=20)   45.20m ± 0%  -3.16% (p=0.000 n=20)
GoParser   95.17m ± 1%   93.54m ± 1%  -1.71% (p=0.000 n=20)   92.50m ± 0%  -2.80% (p=0.000 n=20)
Reflect    212.4m ± 0%   206.6m ± 1%  -2.72% (p=0.000 n=20)   205.4m ± 1%  -3.31% (p=0.000 n=20)
Tar        95.64m ± 1%   93.19m ± 1%  -2.57% (p=0.000 n=20)   92.55m ± 0%  -3.23% (p=0.000 n=20)
XML        111.0m ± 0%   108.0m ± 1%  -2.67% (p=0.000 n=20)   107.2m ± 1%  -3.38% (p=0.000 n=20)
geomean    148.9m        144.2m       -3.17%                  142.9m       -4.05%

For #60234.

Change-Id: I6c4f0609ba578a2848ce6cfcc748dfdda7222182
Reviewed-on: https://go-review.googlesource.com/c/go/+/677375
Reviewed-by: David Chase <drchase@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-05-29 15:20:31 -07:00
Michael Anthony Knyszek 9f3dd846e2 cmd/internal/obj/s390x: fix potential recursive String call
This String method can potentially recurse infinitely, since %#x will
apparently call String if the method exists. This isn't well documented,
but cmd/vet will be updated soon to check this (when we update the
vendored x/tools dependency) so cut off the recursion by converting to
the underlying type first.

Change-Id: Ia6fc046c9eb56a5dd6a33772afd23da443a06116
Reviewed-on: https://go-review.googlesource.com/c/go/+/677261
Auto-Submit: Michael Knyszek <mknyszek@google.com>
Reviewed-by: David Chase <drchase@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-05-29 12:49:45 -07:00
Damien Neil 21b7e60c6b runtime, testing/synctest: breaking bubble isolation with Cond is fatal
sync.Cond.Wait is durably blocking. Waking a goroutine out of Cond.Wait
from outside its bubble panics.

Make this panic a fatal panic, since it leaves the notifyList in an
inconsistent state. We could do some work to make this a recoverable
panic, but the complexity doesn't seem worth the outcome.

For #67434

Change-Id: I88874c1519c2e5c0063175297a9b120cedabcd07
Reviewed-on: https://go-review.googlesource.com/c/go/+/675617
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Damien Neil <dneil@google.com>
2025-05-29 12:49:36 -07:00
Damien Neil 555d425d17 testing, testing/synctest: write bubble errors to parent test log
Ensure that log messages written to the testing.T created by
synctest.Test appear in the test output when a test fails.

Fixes #73902

Change-Id: Ie97f5efe54eb003e6c0a5394c2def4cac1520ecb
Reviewed-on: https://go-review.googlesource.com/c/go/+/676995
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>
2025-05-29 12:46:41 -07:00
Mark Freeman f14f3aae1c internal/pkgbits: explain the rationale for reference tables
The primary benefit of reference tables is to the linker, though they
are also reasonably compact as compared to absolute element indices. It
is worth also checking if reference table structure is similarly
exploited past the IR linking stage.

Ideally, the reference table definition would live in / near the linker.
As it stands, it's a bit hard to infer the purpose of the reference
tables when looking at pkgbits in isolation.

Change-Id: I496aca5a4edcf28e66fa7863ddfa4d825e1b2e89
Reviewed-on: https://go-review.googlesource.com/c/go/+/675596
Auto-Submit: Mark Freeman <mark@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-05-29 11:47:07 -07:00
Alan Donovan 4878b4471b slices: document and test nilness behavior of all functions
This change documents the current nilness behavior of all
functions in the package, and asserts each with a test.

There is no change to behavior, but the postcondition is
strengthened, so this may require a proposal.

Fixes #73604
Fixes #73048

Change-Id: Ieb68e609a1248bd81c8507d3795785622a65f8cb
Reviewed-on: https://go-review.googlesource.com/c/go/+/671996
Auto-Submit: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Austin Clements <austin@google.com>
2025-05-29 11:14:52 -07:00
Michael Pratt 7b4d065267 runtime: add vgetrandom lock rank
vgetrandomGetState can call malloc, so this is not a leaf lock.

Our staticlockrank builder doesn't support vgetrandom, so it didn't
catch this.

Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-staticlockranking
Change-Id: I6a6a636c36c9172e4ebf9493c10cb23cac29a13f
Reviewed-on: https://go-review.googlesource.com/c/go/+/677255
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2025-05-29 10:55:45 -07:00
Michael Pratt e481a08e0e runtime: guarantee no GOMAXPROCS update syscalls after GOMAXPROCS call
We already guarantee that no automatic updates to GOMAXPROCS occur after
a GOMAXPROCS call returns. This is easily achieved by having the update
goroutine double-check that updates are still allowed during STW before
committing the new value.

However, it is possible for sysmon to concurrently run defaultGOMAXPROCS
to compute a new GOMAXPROCS value after GOMAXPROCS returns. This new
value will be discarded later, but we'll still perform the system calls
necessary to compute the new value.

Normally this distinction doesn't matter, but if you want to sandbox a
Go program, then you may want to disable GOMAXPROCS updates to reduce
the system call footprint. A call to GOMAXPROCS will disable updates,
but without a guarantee on when sysmon will observe the change it is
somewhat fragile.

Add explicit synchronization between GOMAXPROCS and sysmon to guarantee
that sysmon won't run defaultGOMAXPROCS after GOMAXPROCS returns.

The synchronization is a bit complex because we can't hold a mutex
across STW, nor take a semaphore from sysmon, but the result isn't too
bad.

One oddity is that sched.customGOMAXPROCS and gomaxprocs are no longer
updated in lockstep (even though both are protected by sched.lock), but
I don't believe anything should depend on that.

For #73193.

Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-staticlockranking
Change-Id: I6a6a636cff243a9b69ac1b5d2f98925648e60236
Reviewed-on: https://go-review.googlesource.com/c/go/+/677037
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2025-05-29 10:55:39 -07:00
Gopher Robot dd678172e3 doc/next: delete
The release note fragments have been merged and added
as _content/doc/go1.25.md in x/website in CL 677175.

For #71661.

Change-Id: Ie1a895de03c20941a38b0a6a45f4cf6bc21278e1
Reviewed-on: https://go-review.googlesource.com/c/go/+/677335
Auto-Submit: Gopher Robot <gobot@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: David Chase <drchase@google.com>
2025-05-29 10:46:01 -07:00
Damien Neil c2f0fe5854 internal/synctest: speed up TestWeak
Run TestWeak for fewer iterations. Five is enough reproduce #73817,
which was the motivation for this test. runtime.GC is ridiculously
slow on wasm, and not especially fast anywhere else.

Change-Id: Ieb5235d064b123cbc22a306425e385c273b54493
Reviewed-on: https://go-review.googlesource.com/c/go/+/675716
Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-05-29 10:29:01 -07:00
Damien Neil b170c7e94c runtime, internal/synctest, sync: associate WaitGroups with bubbles
Add support to internal/synctest for managing associations between
arbitrary pointers and synctest bubbles. (Implemented internally to
the runtime package by attaching a special to the pointer.)

Associate WaitGroups with bubbles.
Since WaitGroups don't have a constructor,
perform the association when Add is called.
All Add calls must be made from within the same bubble,
or outside any bubble.

When a bubbled goroutine calls WaitGroup.Wait,
the wait is durably blocking iff the WaitGroup is associated
with the current bubble.

Change-Id: I77e2701e734ac2fa2b32b28d5b0c853b7b2825c9
Reviewed-on: https://go-review.googlesource.com/c/go/+/676656
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Damien Neil <dneil@google.com>
2025-05-29 10:26:00 -07:00
Michael Pratt 3b77085b40 runtime: increment updatemaxprocs metric only when disabled
The updatemaxprocs metric logic is currently backwards. We only
increment the metric when we update GOMAXPROCS, but that only occurs if
updatemaxprocs is enabled.

Instead, the metric is supposed to increment when updatemaxprocs is
disabled and there would be different behavior if it were enabled.

Theoretically we should run the entire update system in a dry run mode,
and only bail out right before committing updates. But that is an awful
lot of effort for a feature that is disabled. Plus some users (like
sandboxes) want to completely disable the update syscalls
(sched_getaffinity and pread64). If we still do dry run updates then we
need an additional GODEBUG for completely disabling functionality.

This CL also avoids starting the update goroutine at all if disabled,
since it isn't needed.

For #73193.

Change-Id: I6a6a636ceec8fced44e36cb27dcb1b4ba51fce33
Reviewed-on: https://go-review.googlesource.com/c/go/+/677036
Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
2025-05-29 09:15:21 -07:00
Alan Donovan f8c51b1a6c go/doc: NewFromFiles: fix panic on Files with SkipObjectResolution
This CL fixes a panic in NewFromFiles when it is provided files
produced by the parser in SkipObjectResolution mode, which skips
the step of connecting ast.Idents to (deprecated) ast.Objects.
Instead of calling ast.NewPackage, which performs a number of
unnecessary steps, we just construct the ast.Package directly.

Fixes #66290

Change-Id: Id55bd30d8afb9d396c3901070e7607c5a22030d5
Reviewed-on: https://go-review.googlesource.com/c/go/+/675036
Reviewed-by: Robert Griesemer <gri@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-05-29 08:18:49 -07:00
Gopher Robot 263bc50c90 api: promote next to go1.25
Change-Id: I96dd383ea0bf0b69d2d9058334b4bbcfbe50c77c
Reviewed-on: https://go-review.googlesource.com/c/go/+/676895
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2025-05-29 07:46:41 -07:00
Keith Randall dbaa2d3e65 cmd/compile: do nil check before calling duff functions, on arm64 and amd64
On these platforms, we set up a frame pointer record below
the current stack pointer, so when we're in duffcopy or duffzero,
we get a reasonable traceback. See #73753.

But because this frame pointer record is below SP, it is vulnerable.
Anything that adds a new stack frame to the stack might clobber it.
Which actually happens in #73748 on amd64. I have not yet come across
a repro on arm64, but might as well be safe here.

The only real situation this could happen is when duffzero or duffcopy
is passed a nil pointer. So we can just avoid the problem by doing the
nil check outside duffzero/duffcopy. That way we never add a frame
below duffzero/duffcopy. (Most other ways to get a new frame below the
current one, like async preempt or debugger-generated calls, don't
apply to duffzero/duffcopy because they are runtime functions; we're
not allowed to preempt there.)

Longer term, we should stop putting stuff below SP. #73753 will
include that as part of its remit. But that's not for 1.25, so we'll
do the simple thing for 1.25 for this issue.

Fixes #73748

Change-Id: I913c49ee46dcaee8fb439415a4531f7b59d0f612
Reviewed-on: https://go-review.googlesource.com/c/go/+/676916
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@google.com>
2025-05-28 20:35:09 -07:00
Michael Pratt 6160fa59b6 runtime: rename updateGOMAXPROCS to updateMaxProcsG
There are other parts to updating GOMAXPROCS than just the helper
goroutine, so make the naming more specific.

For #73193.

Change-Id: I6a6a636c31ac80c8d76afe90c0bfc29d3086af4d
Reviewed-on: https://go-review.googlesource.com/c/go/+/677035
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-05-28 15:02:02 -07:00
Michael Anthony Knyszek ae6c098f48 doc/next: add release note for riscv64 plugin build mode
Change-Id: I9df20038cc1d6bf86f789e962903766856555a13
Reviewed-on: https://go-review.googlesource.com/c/go/+/676956
Auto-Submit: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2025-05-28 13:47:19 -07:00
Mark Freeman 18ad74dd36 go/types, types2: dump position stack for non-bailout panics
We make sure to dump to stderr since that's where the panic information
ends up. Long traces get truncated with a "..." in the middle. We pick
an arbitrary limit of 10 positions, but this could be changed.

For #51603

Change-Id: I02326a93181e94e1c48afc05684240540c2c90ba
Reviewed-on: https://go-review.googlesource.com/c/go/+/676815
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Mark Freeman <mark@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-05-28 12:37:33 -07:00
Cherry Mui 70109eb326 cmd/link: allow linkname reference to a TEXT symbol regardless of size
In CL 660696, we made the linker to choose the symbol of the
larger size in case there are multiple contentless declarations of
the same symbol. We also made it emit an error in the case that
there are a contentless declaration of a larger size and a
definition with content of a smaller size. In this case, we should
choose the definition with content, but the code accesses it
through the declaration of the larger size could fall into the
next symbol, potentially causing data corruption. So we disallowed
it.

There is one spcial case, though, that some code uses a linknamed
variable declaration to reference a function in assembly, in order
to take its address. The variable is often declared as uintptr.
The function symbol is the definition, which could sometimes be
shorter. This would trigger the error case above, causing existing
code failing to build.

This CL allows it as a special case. It is still not safe to
access the variable's content. But it is actually okay to just
take its address, which the existing code often do.

Fixes #73617.

Change-Id: I467381bc5f6baa16caee6752a0a824c7185422f6
Reviewed-on: https://go-review.googlesource.com/c/go/+/676636
Reviewed-by: David Chase <drchase@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-05-28 11:59:46 -07:00
Michael Anthony Knyszek eff3288042 doc/next: tweak runtime release notes
- Add section headings to make the section easier to read.
- Reorder features to better reflect their impact and importance.
- Tweak some awkward wording here and there.

Change-Id: If72c526f4b3a26a7a4584d6c59857db02c0c1338
Reviewed-on: https://go-review.googlesource.com/c/go/+/676818
Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
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2025-05-28 11:33:45 -07:00
Dmitri Shuralyov c61e5e7244 lib/time: update to 2025b/2025b
Commit generated by update.bash.

For #22487.

Change-Id: If4132dc12296b23b85a221bffdb1b854d0332010
Reviewed-on: https://go-review.googlesource.com/c/go/+/676855
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2025-05-28 09:03:11 -07:00
Damien Neil ed08d2ad09 os: don't follow symlinks on Windows when O_CREATE|O_EXCL and read-only
Fix a bug in CL 672396, where we add FILE_FLAG_OPEN_REPARSE_POINT to
the attributes passed to CreateFile, but then overwrite the attributes
with FILE_ATTRIBUTE_READONLY when opening a file with a read-only
permissions mode.

For #73702

Change-Id: I6c10bf470054592bafa031732585fc3155c61341
Reviewed-on: https://go-review.googlesource.com/c/go/+/676655
Auto-Submit: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
2025-05-27 19:35:07 -07:00
Damien Neil fce9d4515d runtime, testing/synctest: verify cleanups/finalizers run outside bubbles
Cleanup functions and finalizers must not run in a synctest bubble.
If they did, a function run by the GC at an unpredictable time
could unblock a bubble that synctest believes is durably
blocked.

Add a test verifying that cleanups and finalizers are always
run by non-bubbled goroutines. (This is already the case because
we never add system goroutines to a bubble.)

For #67434

Change-Id: I5a48db2b26f9712c3b0dc1f425d99814031a2fc1
Reviewed-on: https://go-review.googlesource.com/c/go/+/675257
Reviewed-by: Michael Pratt <mpratt@google.com>
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Auto-Submit: Damien Neil <dneil@google.com>
2025-05-27 14:47:13 -07:00
Damien Neil b78e38065e runtime: define lock ranking between weak pointers and synctest
Fixes #73817

Change-Id: I0101bdc797237b4c7eb58b414c71b009b0b44447
Reviewed-on: https://go-review.googlesource.com/c/go/+/675176
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Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Damien Neil <dneil@google.com>
2025-05-27 14:47:09 -07:00
thepudds 961818e013 cmd/compile/internal/walk: use original type for composite literals in addrTemp
When creating a new *ir.Name or *ir.LinksymOffsetExpr to represent
a composite literal stored in the read-only data section, we should
use the original type of the expression that was found via
ir.ReassignOracle.StaticValue. (This is needed because the StaticValue
method can traverse through OCONVNOP operations to find its final
result.)

Otherwise, the compilation may succeed, but the linker might erroneously
conclude that a type is not used and prune an itab when it should not,
leading to a call at execution-time to runtime.unreachableMethod, which
throws "fatal error: unreachable method called. linker bug?".

The tests exercise both the case of a zero value struct literal that
can be represented by the read-only runtime.zeroVal, which was the case
of the simplified example from #73888, and also modifies that example to
test the non zero value struct literal case.

This CL makes two similar changes for those two cases. We can get either
of the tests we are adding to fail independently if we only make
a single corresponding change.

Fixes #73888
Updates #71359

Change-Id: Ifd91f445cc168ab895cc27f7964a6557d5cc32e5
Reviewed-on: https://go-review.googlesource.com/c/go/+/676517
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Keith Randall <khr@golang.org>
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
2025-05-27 13:52:47 -07:00
Carlos Amedee c8c3d661b0 runtime/trace: add a trace validation test for different trace orders
This adds a test which validates the traces generated by the execution
tracer and the flight recorder depending on the order where they are
stopped and started. This test uncovered that under certain
circumstances, the traces which were produced would possibly be
missing the trace header. All traces have the trace headers included
now. Clock snapshot checks have been disabled for Windows and WASM.

Change-Id: I5be719d228300469891fc56817fbce4ba5453fff
Reviewed-on: https://go-review.googlesource.com/c/go/+/675975
Auto-Submit: Carlos Amedee <carlos@golang.org>
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
2025-05-27 13:02:21 -07:00
Michael Matloob 0e1b14bc2e cmd/go: fix get with the new 'work' pattern
Before this change, go get didn't have support for the work pattern. The
work pattern is new in Go 1.25 and evaluates to the packages in the work
(also called main) modules. 'go get work' would cause a panic because
'work' would be incorrectly considered a path pattern and then queryPath
would would try to query a metapackage pattern (resulting in the
internal error panic). This change properly supports the work pattern in
go get.

It's pretty simple: First, we need to seprate the work pattern from the
other patterns. Then in performWorkQueries, which maps queries to the
modules that satisfy them, we return the single main module because by
definition the work pattern is the set of packages in the work modules,
and go get always runs in single module mode. (The exception is when the
work module contains no packages, in which case we report a warning, and
return no candidates because nothing is needed to resolve nothing).

The rest of the work is already done by loading the packages matching
the query and finding missing imports in the call to
findAndUpgradeImports in runGet.

Change-Id: I3c4610878b3d930a1d106cc59d9a0be194d966cd
Reviewed-on: https://go-review.googlesource.com/c/go/+/675895
Reviewed-by: Michael Matloob <matloob@google.com>
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Reviewed-by: Michael Pratt <mpratt@google.com>
2025-05-27 13:01:16 -07:00
Sean Liao 09f1546cba log/slog: fix longtests with empty source
Tests broken by CL 674875

Updates #73808

Change-Id: I7ad93e4a8ba1977d136f99b9d4963fa8a9c159ff
Reviewed-on: https://go-review.googlesource.com/c/go/+/676595
Auto-Submit: Michael Knyszek <mknyszek@google.com>
TryBot-Bypass: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2025-05-27 12:45:08 -07:00
David Chase de05282a2c doc/next: add small header to TODO
Change-Id: I91c03f455fff8e4078f3297ea357cd1e1dd09f66
Reviewed-on: https://go-review.googlesource.com/c/go/+/676536
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: David Chase <drchase@google.com>
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2025-05-27 12:02:03 -07:00
Alan Donovan c146a61d4c go/token: benchmark FileSet.{Position,AddExistingFiles}
This CL adds a benchmark of FileSet.Position, the lookup
operation, and the new AddExistingFiles. It is evident
that its behavior is quadratic in important cases:

(Apple M1)
BenchmarkFileSet_AddExistingFiles/sequence-8         	       3	 362768139 ns/op

Change-Id: I256fdc776135e1924666d127afb37dacbefc860f
Reviewed-on: https://go-review.googlesource.com/c/go/+/675875
Reviewed-by: Robert Findley <rfindley@google.com>
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Auto-Submit: Alan Donovan <adonovan@google.com>
2025-05-27 11:03:31 -07:00
Alan Donovan ae0824883e go/ast: deprecate FilterPackage, PackageExports, MergePackageFiles
(More symbols that belong to the ast.Object deprecation.)

Fixes #73088
Fixes #7124
Updates #52463
Updates #71122

Change-Id: I10e3ef35b587da2f3f0a65e9154e33bd53e7a093
Reviewed-on: https://go-review.googlesource.com/c/go/+/674176
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Reviewed-by: Robert Griesemer <gri@google.com>
2025-05-27 10:26:20 -07:00
Michael Pratt 8dd7d2111b runtime: skip nil Ps in allp during cleanup flush
cleanupQueue.Flush is reachable from mallocgc via sweepAssist. Normally
allp will continue all valid Ps, but procresize itself increases the
size of allp and then allocates new Ps to place in allp. If we get
perfectly unlucky, the new(p) allocations will complete sweeping and
cleanupQueue.Flush will dereference a nil pointer from allp. Avoid this
by skipping nil Ps.

I've looked through every other use of allp and none of them appear to
be reachable from procresize.

Change-Id: I6a6a636cab49ef268eb8fcd9ff9a96790d9c5685
Reviewed-on: https://go-review.googlesource.com/c/go/+/676515
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
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2025-05-27 08:38:39 -07:00
Filippo Valsorda 3a3c006ac0 crypto/tls: enable signature algorithm BoGo tests (and fix two bugs)
The two bugs are very minor:

- We were trying to set the ConnectionState CurveID field even if the
  RSA key exchange was in use

- We were sending the wrong alert from TLS 1.2 clients if none of the
  certificate signature algorithms were supported

Change-Id: I6a6a46564f5a9f1a5d44e54fc59a650118ad67d5
Reviewed-on: https://go-review.googlesource.com/c/go/+/675918
Auto-Submit: Filippo Valsorda <filippo@golang.org>
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Reviewed-by: Daniel McCarney <daniel@binaryparadox.net>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2025-05-27 08:37:16 -07:00
jiahua wang ed70477909 errors: add joinError Unwrap example
Change-Id: Id7489247e9bdd413f82fdf5a70197856c47abfb5
Reviewed-on: https://go-review.googlesource.com/c/go/+/674336
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Sean Liao <sean@liao.dev>
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Auto-Submit: Sean Liao <sean@liao.dev>
2025-05-27 08:37:09 -07:00
cuishuang 787362327f io/fs: add examples for Glob,ReadFile and ValidPath
Change-Id: I8451179bc0fa88b7e60afbc6fd9e06a22a94f3aa
Reviewed-on: https://go-review.googlesource.com/c/go/+/673835
Reviewed-by: Sean Liao <sean@liao.dev>
Auto-Submit: Sean Liao <sean@liao.dev>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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Reviewed-by: David Chase <drchase@google.com>
2025-05-27 08:37:04 -07:00
Antonio Pitasi 3fd729b2a1 log/slog: make TextHandler discard empty Source
Fixes #73808

Change-Id: Ica4b7a63eebbf0fff41d68f4de928f9da90c8ada
Reviewed-on: https://go-review.googlesource.com/c/go/+/674875
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Sean Liao <sean@liao.dev>
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2025-05-24 08:48:53 -07:00
Sean Liao c07ffe980a testing/synctest: correct duration in doc example
Fixes #73839

Change-Id: I961641c6d8244cdeb101a3c9ae91931828a893ad
Reviewed-on: https://go-review.googlesource.com/c/go/+/676035
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2025-05-24 08:42:04 -07:00
Mateusz Poliwczak 3db50924e2 hash: mention the new Cloner interface in Hash docs.
We mention that already in Cloner docs, but to be consistent, also
mention that in Hash.

Change-Id: Iee33d545662b7054973666bd45998a37f3037a51
Reviewed-on: https://go-review.googlesource.com/c/go/+/675915
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Reviewed-by: David Chase <drchase@google.com>
2025-05-24 06:27:15 -07:00
Filippo Valsorda aca9f4e484 crypto/tls: signature_algorithms in CertificateRequest can't be empty
Change-Id: I6a6a4656ab97e1f247df35b2589cd73461b4ac76
Reviewed-on: https://go-review.googlesource.com/c/go/+/675917
Auto-Submit: Filippo Valsorda <filippo@golang.org>
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2025-05-23 17:06:24 -07:00
Carlos Amedee 8cb0941a85 net: use runtime.AddCleanup instead of runtime.SetFinalizer
Adds TODO for replacement of runtime.SetFinalizer.

Fixes #70907

Change-Id: Ic009018a93ccc46a776ae34afac44635d2340cbf
Reviewed-on: https://go-review.googlesource.com/c/go/+/638557
Reviewed-by: Damien Neil <dneil@google.com>
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2025-05-23 14:59:20 -07:00
Michael Pratt 68f4434df0 runtime/trace: match traceClockNow types
runtime.traceClockNow returns a (named) uint64. Make the declaration in
runtime/trace match this type.

Change-Id: I6a6a636ce3596cbc6fc5bac3590703b7b4839c4d
Reviewed-on: https://go-review.googlesource.com/c/go/+/675976
Reviewed-by: Carlos Amedee <carlos@golang.org>
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2025-05-23 14:56:40 -07:00
David Chase 8b1978f614 doc/next: add crudely processed todos
This is the output of relnote -goroot=... todo,
with each todo in a comment, followed by summary
text from the issue and perhaps the CL, lightly
processed into markdown.

For #71661.

Change-Id: I855c4c4ee02491b5b6113822baf69dbafb4e54ab
Reviewed-on: https://go-review.googlesource.com/c/go/+/675877
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2025-05-23 14:52:42 -07:00