The errors from os are supposed to be wrapped to add some context,
but in this particular case a raw syscall error is returned.
Change-Id: I1b98dbd7b385c5c1cea79a1b0ec7201ca9bdca40
Reviewed-on: https://go-review.googlesource.com/c/go/+/606657
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Makes calls to the global Seed a no-op. The GODEBUG=randseednop=0
setting can be used to revert this behavior.
Fixes#67273
Change-Id: I79c1b2b23f3bc472fbd6190cb916a9d7583250f4
Reviewed-on: https://go-review.googlesource.com/c/go/+/606055
Auto-Submit: Cherry Mui <cherryyz@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Change-Id: Id991ec0826a4e2857f00330b4b7ff2b71907b789
Reviewed-on: https://go-review.googlesource.com/c/go/+/606615
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
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Commit-Queue: Ian Lance Taylor <iant@google.com>
Mutex contention events with delay of 0 need more than CL 604355 added:
When deciding which event to store in the M's single available slot,
always choose to drop the zero-delay event. Store an explicit flag for
whether we have an event to store, rather than relying on a non-zero
delay.
And, fix a test of sync.Mutex contention that expects those events to
have non-zero delay. The reporting of non-runtime contention like this
has long allowed zero-delay events, which we see when cputicks has low
resolution.
Fixes#68892Fixes#68906
Change-Id: Id412141e4eb09724f3ce195899a20d59c92d7b78
Reviewed-on: https://go-review.googlesource.com/c/go/+/606115
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Reviewed-by: Michael Pratt <mpratt@google.com>
When GORISCV64 enables rva22u64, make use of integer MIN/MINU/MAX/MAXU
instructions in compiler rewrite rules.
Change-Id: I4e7c514516acad03f2869d4c8936f06582cf7ea9
Reviewed-on: https://go-review.googlesource.com/c/go/+/559660
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
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Reviewed-by: Meng Zhuo <mengzhuo1203@gmail.com>
The correct word can be seen in lines 381-382.
Change-Id: If3876bd34b6433b69531763f63af88d60a0bfad0
Reviewed-on: https://go-review.googlesource.com/c/go/+/606375
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Reviewed-by: Carlos Amedee <carlos@golang.org>
Some tests need to use os.Chdir, but the use is complicated because
- they must change back to the old working directory;
- they must not use t.Parallel.
Add Chdir that covers these cases, and sets PWD environment variable
to the new directory for the duration of the test for Unix platforms.
Unify the panic message when t.Parallel is used together with t.Setenv
or t.Chdir.
Add some tests.
For #62516.
Change-Id: Ib050d173b26eb28a27dba5a206b2d0d877d761c1
Reviewed-on: https://go-review.googlesource.com/c/go/+/529895
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In Go 1.22 we added code to the go/build package to ignore #cgo noescape
and nocallback directives. That permits us to enable these directives in Go 1.24.
Also, this fixed a Bug in CL 497837:
After retiring _Cgo_use for parameters, the compiler will treat the
parameters, start from the second, as non-alive. Then, they will be marked
as scalar in stackmap, which means the pointer won't be copied correctly
in copystack.
Fixes#56378.
Fixes#63739.
Change-Id: I46e773240f8a467c3c4ba201dc5b4ee473cf6e3e
GitHub-Last-Rev: 42fcc506d6
GitHub-Pull-Request: golang/go#66879
Reviewed-on: https://go-review.googlesource.com/c/go/+/579955
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Carlos Amedee <carlos@golang.org>
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Follows up CL 605355
Fixes#68863
Change-Id: I56e05822502e66eed610d5e924d110607ce146b5
Reviewed-on: https://go-review.googlesource.com/c/go/+/606135
Reviewed-by: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
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Run-TryBot: Andy Pan <panjf2000@gmail.com>
On Linux, a call to creat() is equivalent to calling open() with flags
equal to O_CREAT|O_WRONLY|O_TRUNC, which applies to other platforms
as well in a similar manner. Thus, to force CopyFS's behavior to
comply with the function comment, we need to replace O_TRUNC with O_EXCL.
Fixes#68895
Change-Id: I3e2ab153609d3c8cf20ce5969d6f3ef593833cd1
Reviewed-on: https://go-review.googlesource.com/c/go/+/606095
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Add support for importing a new 'B' tag for type parameters aliases
in the indexed data format.
Updates #68778
Change-Id: I3bd82870d4c4619a3771de30baf6d54f6ee5959e
Reviewed-on: https://go-review.googlesource.com/c/go/+/604635
Reviewed-by: Robert Findley <rfindley@google.com>
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Change-Id: I512808d3cf91466eb6f2c21b49b39ff2e08a9b8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/605498
Reviewed-by: Carlos Amedee <carlos@golang.org>
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Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Named.cleanup is called at the end of type-checking to ensure that
a named type is fully set up; specifically that it's underlying
field is not (still) a Named type. Now it can also be an *Alias
type. Add this case to the respective type switch.
Fixes#68877.
Change-Id: I29bc0024ac9d8b0152a3d97c82dd28d09d5dbd66
Reviewed-on: https://go-review.googlesource.com/c/go/+/605977
Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
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For #62384
Change-Id: I1557704c6a0f9c6f3b9aad001374dd5cdbc99065
GitHub-Last-Rev: c258d18cce
GitHub-Pull-Request: golang/go#68893
Reviewed-on: https://go-review.googlesource.com/c/go/+/605758
Reviewed-by: Ian Lance Taylor <iant@google.com>
Commit-Queue: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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When people return UnmarshalTypeError in UnmarshalJSON, we should append error's Field to FieldStack.
Fixes#68750
Change-Id: I0a5a9b259a1b569de1bebc815ec936c913e10469
GitHub-Last-Rev: 18796addc3
GitHub-Pull-Request: golang/go#68870
Reviewed-on: https://go-review.googlesource.com/c/go/+/605455
Reviewed-by: Carlos Amedee <carlos@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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For the moment, Go calls sendfile(2) to transfer at most 4MB at a time
while sendfile(2) actually allows a larger amount of data on one call.
To reduce system calls of sendfile(2) during data copying, we should
specify the number of bytes to copy as large as possible.
This optimization is especially advantageous for bulky file-to-file copies,
it would lead to a performance boost, the magnitude of this performance
increase may not be very exciting, but it can also cut down the CPU overhead
by decreasing the number of system calls.
This is also how we've done in sendfile_windows.go with TransmitFile.
goos: linux
goarch: amd64
pkg: os
cpu: DO-Premium-AMD
│ old │ new │
│ sec/op │ sec/op vs base │
SendFile-8 1.135 ± 4% 1.052 ± 3% -7.24% (p=0.000 n=10)
│ old │ new │
│ B/s │ B/s vs base │
SendFile-8 902.5Mi ± 4% 973.0Mi ± 3% +7.81% (p=0.000 n=10)
│ old │ new │
│ B/op │ B/op vs base │
SendFile-8 272.0 ± 0% 272.0 ± 0% ~ (p=1.000 n=10) ¹
¹ all samples are equal
│ old │ new │
│ allocs/op │ allocs/op vs base │
SendFile-8 20.00 ± 0% 20.00 ± 0% ~ (p=1.000 n=10) ¹
¹ all samples are equal
Change-Id: Ib4d4c6bc693e23db24697363b29226f0c9776bb0
Reviewed-on: https://go-review.googlesource.com/c/go/+/605235
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Reviewed-by: Carlos Amedee <carlos@golang.org>
Use t.Helper to make the reported failure lines more helpful.
Change-Id: I6593924b3892b2441a197aee4e05f71ea236d426
GitHub-Last-Rev: 2e020ea85c
GitHub-Pull-Request: golang/go#68843
Reviewed-on: https://go-review.googlesource.com/c/go/+/604755
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Reviewed-by: Carlos Amedee <carlos@golang.org>
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Flips the pkgReader.enableAlias flag to true when reading unified IR.
This was disabled while resolving #66873. This resolves the TODO to
flip it back to true.
Updates #66873
Updates #68778
Change-Id: Ifd52b0f9510d6bcf151de1c9a18d71ab548c14e4
Reviewed-on: https://go-review.googlesource.com/c/go/+/604099
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This reverts CL 603895
Reason for revert: We've decided to change the logic for how upgrades are done and want to submit the new logic in a self contained CL that can be cherry-picked onto release-branch.go1.23
Change-Id: I366af8e95ce1de7311b0385a23f9dd3df175745a
Reviewed-on: https://go-review.googlesource.com/c/go/+/605675
Reviewed-by: Cherry Mui <cherryyz@google.com>
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The port is reportedly broken, and there isn't a builder testing it.
For #68552.
For #67308.
Change-Id: Iababa17cdf855b675aaf85642a667e8081ef5dfe
Reviewed-on: https://go-review.googlesource.com/c/go/+/601777
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Fixes#68863
Change-Id: I0ca324137d1f7510bd0b245791fef07d3b5b401a
Reviewed-on: https://go-review.googlesource.com/c/go/+/605355
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The block and mutex profiles have slightly different behaviors when a
sampled event has a negative (or zero) duration. The block profile
enforces a minimum duration for each event of "1" in the cputicks unit.
It does so by clamping the duration to 1 if it was originally reported
as being smaller. The mutex profile for app-level contention enforces a
minimum duration of 0 in a similar way: by reporting any negative values
as 0 instead.
The mutex profile for runtime-internal contention had a different
behavior: to enforce a minimum event duration of "1" by dropping any
non-conforming samples.
Stop dropping samples, and use the same minimum (0) that's in place for
the other mutex profile events.
Fixes#64253Fixes#68453Fixes#68781
Change-Id: I4c5d23a2675501226eef5b9bc1ada2efc1a55b9e
Reviewed-on: https://go-review.googlesource.com/c/go/+/604355
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Reviewed-by: Carlos Amedee <carlos@golang.org>
Auto-Submit: Rhys Hiltner <rhys.hiltner@gmail.com>
Change-Id: I1c837820bdd64b61fca46d45677664b2bb2be606
Reviewed-on: https://go-review.googlesource.com/c/go/+/605356
Commit-Queue: Ian Lance Taylor <iant@google.com>
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Fixes#61901.
Change-Id: I4db21c91fd21079f2aa3bc81fb03dd6f40423a38
GitHub-Last-Rev: ed3df560a4
GitHub-Pull-Request: golang/go#67543
Reviewed-on: https://go-review.googlesource.com/c/go/+/587095
Auto-Submit: Ian Lance Taylor <iant@google.com>
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UDF provides a stronger guarantee for generating the Undefined
Instruction exception than the current value being emitted.
Change-Id: I234cd70ce04f21311959c1061ae24992438105f8
Reviewed-on: https://go-review.googlesource.com/c/go/+/605155
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Reviewed-by: Cherry Mui <cherryyz@google.com>
After newobject, we don't need to write zeroes to initialize the
object. It has already been zeroed by the allocator.
This is already handled in most cases, but because we run builtin
decomposition after the opt pass, we don't handle cases where the zero
of a compound builtin is being written. Improve the zero detector to
handle those cases.
Fixes#68845
Change-Id: If3dde2e304a05e5a6a6723565191d5444b334bcc
Reviewed-on: https://go-review.googlesource.com/c/go/+/605255
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Auto-Submit: Keith Randall <khr@google.com>
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Change-Id: I13e878579b51638c2c07ad3ea99be7276177875c
Reviewed-on: https://go-review.googlesource.com/c/go/+/603735
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Change-Id: Id5c12c9edf278f2419900ebbfb0b7f388bafc9b1
Reviewed-on: https://go-review.googlesource.com/c/go/+/604177
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
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The existing implementation of bogo_shim_test does not support tests
that use the -expect-advertised-alpn flag or the -select-alpn flag. This
change allows bogo_shim_test to receive and enforce these flags.
Support for these flags is added in the same change because these flags are set together.
Updates #51434
Change-Id: Ia37f9e7403d4a43e6da68c16039a4bcb56ebd032
Reviewed-on: https://go-review.googlesource.com/c/go/+/595655
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Russell Webb <russell.webb@protonmail.com>
Reviewed-by: Clide Stefani <cstefani.sites@gmail.com>
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Auto-Submit: Roland Shoemaker <roland@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
For #62384
Change-Id: I10df580ef966e497ff8da4efde6dd6ce1ccb17b4
GitHub-Last-Rev: 5ad8e2e047
GitHub-Pull-Request: golang/go#68855
Reviewed-on: https://go-review.googlesource.com/c/go/+/605056
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Rather than explicitly calling pthread_detach.
Fixes#68850
Change-Id: I7b4042283f9feb5383bffd40fae6db6d23217f97
Reviewed-on: https://go-review.googlesource.com/c/go/+/605257
Commit-Queue: Ian Lance Taylor <iant@google.com>
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This CL adds support of "library", i.e. c-shared, build mode on
wasip1. When -buildmode=c-shared is set, it builds a Wasm module
that is intended to be used as a library, instead of an executable.
It does not have the _start function. Instead, it has an
_initialize function, which initializes the runtime, but not call
the main function.
This is similar to the c-shared build mode on other platforms. One
difference is that unlike cgo callbacks, where Ms are created on-
demand, on Wasm we have only one M, so we just keep the M (and the
G) for callbacks.
For #65199.
Change-Id: Ieb21da96b25c1a9f3989d945cddc964c26f9085b
Reviewed-on: https://go-review.googlesource.com/c/go/+/604316
Reviewed-by: Achille Roussel <achille.roussel@gmail.com>
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
Changes the type inference error message so that the position is
proceeded by a space. cmd/go rewrites the output of gc to replace
absolute paths at the beginning of lines and those proceeded by a
space or a tab to relative paths.
Updates testdir to do the same post processing on the output
of tests as cmd/go.
Fixes#68292
Change-Id: Ie109b51143e68f6e7ab4cd19064110db0e609a7e
Reviewed-on: https://go-review.googlesource.com/c/go/+/603097
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
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"receiver name `srv` should be consistent with the previous receiver name
`s` for Server" according to go-lint.
Change-Id: I3071ae30b7c1375999e5a599a0eee7b88494f17e
GitHub-Last-Rev: 093c7679b1
GitHub-Pull-Request: golang/go#65787
Reviewed-on: https://go-review.googlesource.com/c/go/+/565175
Auto-Submit: Damien Neil <dneil@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
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Reviewed-by: Damien Neil <dneil@google.com>
For #65199.
Change-Id: Iecd11281706201a655b51583a08318b5ffd8ab04
Reviewed-on: https://go-review.googlesource.com/c/go/+/604975
Reviewed-by: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
Get rid of TODO in prove pass.
We currently avoid marking shifts of constants as bounded, where
bounded means we don't have to worry about <0 or >=bitwidth shifts.
We do this because it causes different rule applications during lowering
which cause some codegen tests to fail.
Add some new rules which ensure that we get the right final instruction
sequence regardless of the ordering. Then we can remove this special case.
Change-Id: I4e962d4f09992b42ab47e123de5ded3b8b8fb205
Reviewed-on: https://go-review.googlesource.com/c/go/+/602935
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This CL will set the binary version using local tag information if
present.
For #50603
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Change-Id: I58bed345c7eea20e51a7b24ff6e943d9d1ed240d
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LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
The spec says that an embedded field must be specified
as a type name (or a pointer to a type name). This is
explicit in the prose and the FieldDecl syntax.
However, the prose on promoted methods required a named
type (originally the term used for a "defined type").
Before the introduction of alias types, type names could
only refer to named/defined types, so the prose was ok.
With the introduction of alias types in Go 1.9, we
distinguished between defined types (i.e., types given
a name through a type declaration) and type aliases
(types given an alternative name), and retired the notion
of a named type since any type with a name (alias type
and defined type) could be considered a "named type".
To make things worse, with Go 1.18 we re-introduced the
notion of a named type which now includes predeclared
types, defined types, type parameters (and with that
type aliases denoting named types).
In the process some of the wording on method promotion
didn't get updated correctly. At attempt to fix this
was made with CL 406054, but while that CL's description
correctly explained the intent, the CL changed the prose
from "defined type" to "named type" (which had the new
meaning after Go 1.18), and thus did not fix the issue.
This CL fixes that fix by using the term "type name".
This makes the prose consistent for embedded types and
in turn clarifies that methods of embedded alias types
(defined or not) can be promoted, consistent with the
implementation.
While at it, also document that the type of an embedded
field cannot be a type parameter. This restriction has
been in place since the introduction of type parameters
with Go 1.18 and is enforced by the compiler.
Fixes#66540.
For #41687.
Change-Id: If9e6a03d7b84d24a3e6a5ceda1d46bda99bdf1f4
Reviewed-on: https://go-review.googlesource.com/c/go/+/603958
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Bypass: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
Reviewed-by: Axel Wagner <axel.wagner.hh@googlemail.com>
Change-Id: Ia46de6c62707db9ef193fe1a2aabb18585f1dd48
Reviewed-on: https://go-review.googlesource.com/c/go/+/603098
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Andy Pan <panjf2000@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Only honor //go:build language version downgrades if the version
specified is 1.21 or greater. Before 1.21 the version in //go:build
lines didn't have the meaning of setting the file's language version.
This fixes an issue that was appearing in GOPATH builds: Go 1.23 started
providing -lang versions to the compiler in GOPATH mode (among other
places) which it wasn't doing before.
For example, take a go file with a //go:build line specifying go1.10.
If that file used a 1.18 feature, that use would compile fine with a Go
1.22 toolchain. But, before this change, it would produce an error when
compiling with the 1.23 toolchain because it set the language version to
1.20 and disallowed the 1.18 feature. This breaks backwards
compatibility: when the build tag was added, it did not have the meaning
of restricting the language version.
Fixes#68658
Change-Id: I4ac2b45a981cd019183d52ba324ba8f0fed93a8e
Reviewed-on: https://go-review.googlesource.com/c/go/+/603895
Reviewed-by: Robert Griesemer <gri@google.com>
Commit-Queue: Michael Matloob <matloob@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Michael Matloob <matloob@golang.org>
Fixes#68832
Change-Id: I74b6aad9a18953c263cbbe795268017a72261f7f
Reviewed-on: https://go-review.googlesource.com/c/go/+/604715
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Commit-Queue: Ian Lance Taylor <iant@google.com>
Currently the crash function on Wasm is implemented as a nil
pointer dereference, which turns into a sigpanic, which turns into
"panic during runtime execution" as we're already in runtime when
crash is called. Instead, just abort, which crashes hard and
terminates the Wasm module execution, and the execution engine
often dumps a stack trace.
Change-Id: I3c57f8ff7a0c0015e4abcd7bf262bf9001624b85
Reviewed-on: https://go-review.googlesource.com/c/go/+/604515
Reviewed-by: Achille Roussel <achille.roussel@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
