For #57757.
For #61422.
Change-Id: Icbe9a86b43eb0816dc5899a1c14b50ee22db1c5d
Reviewed-on: https://go-review.googlesource.com/c/go/+/548095
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
See also https://go.dev/wiki/RangefuncExperiment, written as a companion
to this change.
For #61422.
Change-Id: I129bf38dd2fa4aef47454138b4ca5ed18653aecf
Reviewed-on: https://go-review.googlesource.com/c/go/+/546095
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: David Chase <drchase@google.com>
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Reviewed-by: Alan Donovan <adonovan@google.com>
Updates #59599.
For #61422.
Change-Id: I923be38b719a78dd983372acad93f710a53b0922
Reviewed-on: https://go-review.googlesource.com/c/go/+/548036
Reviewed-by: Keith Randall <khr@google.com>
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Reviewed-by: Keith Randall <khr@golang.org>
They are already mentioned in the Vet section.
For #61422.
Change-Id: I773881df8c6a97263fc3d516e1d38b95679f2693
Reviewed-on: https://go-review.googlesource.com/c/go/+/548480
Reviewed-by: Than McIntosh <thanm@google.com>
TryBot-Bypass: Cherry Mui <cherryyz@google.com>
For #61422.
Change-Id: I3591673b55fef35bc429d2e1ce4bc72c0129c03c
Reviewed-on: https://go-review.googlesource.com/c/go/+/548479
Reviewed-by: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This change restores the original logic in parseParameterList to what
it was before CL 538858 (which caused the issue), not in exact wording
but in identical semantic meaning, and thus restores this function to
a state that we know was working fine.
However, the change keeps the improved error reporting introduced by
CL 538858. To keep the code changes somewhat minimal as we are close
to RC1, the improved error handling exists twice for now even though
it could be factored out.
Fixes#64534.
Change-Id: I0b7bbf74d28811e8aae74f838f2d424f78af1f38
Reviewed-on: https://go-review.googlesource.com/c/go/+/548395
Reviewed-by: Alan Donovan <adonovan@google.com>
Run-TryBot: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
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In CL 547998 I relaxed cmd/go's parsing of version lines to allow it
to recognize clang versions with vendor prefixes. To prevent false-positives,
I added a check for a version 3-tuple following the word "version".
However, it appears that some releases of GCC use only a 2-tuple instead.
Updates #64423.
Fixes#64619.
Change-Id: I5f1d0881b6295544a46ab958c6ad4c2155cf51fe
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ZR register can be used in register pair of LDP, LDPW and LDPSW
instructions, but now it's not allowed. This CL fixes this issue.
Change-Id: I8467502de4664214e0b7dad0295c44f6cff16ee6
Reviewed-on: https://go-review.googlesource.com/c/go/+/547815
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We can't delete all the outgoing edges and then add one back in, because
then we've lost the argument of any phi at the target. Instead, move
the important target to the front of the list and delete the rest.
This normally isn't a problem, because there is never normally a phi
at the target of a jump table. But this isn't quite true when in race
build mode, because there is a phi of the result of a bunch of raceread
calls.
The reason this happens is that each case is written like this (where e
is the runtime.eface we're switching on):
if e.type == $type.int32 {
m = raceread(e.data, m1)
}
m2 = phi(m1, m)
if e.type == $type.int32 {
.. do case ..
goto blah
}
so that if e.type is not $type.int32, it falls through to the default
case. This default case will have a memory phi for all the (jumped around
and not actually called) raceread calls.
If we instead did it like
if e.type == $type.int32 {
raceread(e.data)
.. do case ..
goto blah
}
That would paper over this bug, as it is the only way to construct
a jump table whose target is a block with a phi in it. (Yet.)
But we'll fix the underlying bug in this CL. Maybe we can do the
rewrite mentioned above later. (It is an optimization for -race mode,
which isn't particularly important.)
Fixes#64606
Change-Id: I6f6e3c90eb1e2638112920ee2e5b6581cef04ea4
Reviewed-on: https://go-review.googlesource.com/c/go/+/548356
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: David Chase <drchase@google.com>
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Callers should be using math/rand/v2.Uint64 instead,
but there are lots of linkname references to runtime.fastrand
in public code. If we break it all now, that will require people
to use //go:build tags to use rand/v2.Uint64 with Go 1.22
and keep using the linkname for earlier versions.
Instead, leave the linkname working and then we can remove
it in Go 1.24, at which point everyone should be able to use
math/rand/v2.Uint64 unconditionally.
Change-Id: I7287ca4f67c270b009562313661cc28a4c2219a4
Reviewed-on: https://go-review.googlesource.com/c/go/+/548235
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: David Chase <drchase@google.com>
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Auto-Submit: Russ Cox <rsc@golang.org>
This is a partial revert of CL 483137.
CL 483137 started checking errors in postDecode, which is good. Now we
can catch more malformed pprof protos. However this made
TestEmptyProfile fail, so an early return was added when the profile was
"empty" (no samples).
Unfortunately, this was problematic. Profiles with no samples can still
be valid, but skipping postDecode meant that the resulting Profile was
missing values from the string table. In particular, net/http/pprof
needs to parse empty profiles in order to pass through the sample and
period types to a final output proto. CL 483137 broke this behavior.
internal/profile.Parse is only used in two places: in cmd/compile to
parse PGO pprof profiles, and in net/http/pprof to parse before/after
pprof profiles for delta profiles. In both cases, the input is never
literally empty (0 bytes). Even a pprof proto with no samples still
contains some header fields, such as sample and period type. Upstream
github.com/google/pprof/profile even has an explicit error on 0 byte
input, so `go tool pprof` will not support such an input.
Thus TestEmptyProfile was misleading; this profile doesn't need to
support empty input at all.
Resolve this by removing TestEmptyProfile and replacing it with an
explicit error on empty input, as upstream
github.com/google/pprof/profile has. For non-empty input, always run
postDecode to ensure the string table is processed.
TestConvertCPUProfileEmpty is reverted back to assert the values from
before CL 483137. Note that in this case "Empty" means no samples, not a
0 byte input.
Continue to allow empty files for PGO in order to minimize the chance of
last minute breakage if some users have empty files.
Fixes#64566.
Change-Id: I83a1f0200ae225ac6da0009d4b2431fe215b283f
Reviewed-on: https://go-review.googlesource.com/c/go/+/547996
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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To better diagnose bugs like this one in the future, I think
we should also refuse to use a C compiler if we can't identify
a sensible version for it. I did not do that in this CL because
I want it to be small and low-risk for possible backporting.
Fixes#64423.
Change-Id: I21e44fc55f6fcf76633e4fecf6400c226a742351
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Otherwise, if make.bash produced a relative default CC path but the
user has an absolute path to CC set in their environment, the test
will fail spuriously.
For #64423.
Change-Id: I0f3e1d04851585e1b39266badcda9f17489332d9
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Before this CL, testEndToEnd only turns the relative PC to absolute PC
when pattern "off(PC)" is the suffix of an instruction. But there are
some instructions like:
ADR 10(PC), R10
it's also acceptable for the assembler while the pattern "off(PC)" is
not a suffix, which makes the test fail.
This CL fixes this issue by searching the pattern in the whole string
instead of only in the suffix.
Change-Id: I0cffedeb7b3c63abca7697671088cf993aff71ff
Reviewed-on: https://go-review.googlesource.com/c/go/+/547235
Reviewed-by: Cherry Mui <cherryyz@google.com>
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Reviewed-by: Ruinan Sun <Ruinan.Sun@arm.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Also provide a runnable example to illustrate that behavior.
This should help users to avoid the common mistake of expecting
os.Readlink to return an absolute path.
Fixes#57766.
Change-Id: I8f60aa111ebda0cae985758615019aaf26d5cb41
Reviewed-on: https://go-review.googlesource.com/c/go/+/546995
Auto-Submit: Bryan Mills <bcmills@google.com>
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Reviewed-by: Rob Pike <r@golang.org>
Also confirm that setting the location actually worked before
proceeding with the rest of the test.
This fixes a test failure with git versions older than 2.32.0.
Updates #53955.
Fixes#64603.
Change-Id: I1a954975a3d8300e8b4dca045d3a15438a0407ec
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The escaping of certain control characters has been changed.
The change is compliant with the JSON specification.
The JSON package never promised exactly how JSON formatted
and has historically changed its representation over time.
Change-Id: I8b23f503cfff86c460f642693b50dee24038fb0d
Reviewed-on: https://go-review.googlesource.com/c/go/+/548075
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Adding explicit section headers makes it cleaner to split the profile
descriptions into multiple paragraphs, as there is now an explicit
transition from discussion of one profile type to the next.
For #14689.
Change-Id: Ifcff918367e91a165ee5f74423be3935b421972b
Reviewed-on: https://go-review.googlesource.com/c/go/+/547955
Reviewed-by: Rhys Hiltner <rhys@justin.tv>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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For #63340.
For #61422.
Change-Id: Ib74bb54b0450e96b7f4b7eb7ba2ae7ac2d40171a
Reviewed-on: https://go-review.googlesource.com/c/go/+/547095
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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For #57071.
For #61422.
Change-Id: I5d546d8828be897cb087e85a1251213c582b3894
Reviewed-on: https://go-review.googlesource.com/c/go/+/547059
Reviewed-by: Rhys Hiltner <rhys@justin.tv>
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For #57071.
Change-Id: Ic1645af57aa589917c67154a5e4ad0b4edd7ba90
Reviewed-on: https://go-review.googlesource.com/c/go/+/547058
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Rhys Hiltner <rhys@justin.tv>
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Amazingly, we seem to have nearly no in-tree documentation on the
semantics of block and mutex profiles. Add brief summaries, including
the new behavior from CL 506415 and CL 544195.
For #14689.
For #44920.
For #57071.
For #61015.
Change-Id: I1a6edce7c434fcb43f17c83eb362b1f9d1a32df1
Reviewed-on: https://go-review.googlesource.com/c/go/+/547057
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
The exported API is only available with GOEXPERIMENT=rangefunc.
This will let Go 1.22 users who want to experiment with rangefuncs
access an efficient implementation of iter.Pull and iter.Pull2.
For #61897.
Change-Id: I6ef5fa8f117567efe4029b7b8b0f4d9b85697fb7
Reviewed-on: https://go-review.googlesource.com/c/go/+/543319
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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gitRepo.statLocal reports tag and version information.
If we are statting a hash that corresponds to a tag, we need to add that tag
before calling statLocal so that it can be included in that information.
Fixes#53955.
Updates #56881.
Change-Id: I69a71428e6ed9096d4cb8ed1bb79531415ff06c1
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For #57071.
Change-Id: I7ce6c35bed95a6ea3cdc17007f861c5dd82404d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/547056
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profileruntimelocks is new in CL 544195, but the name is deceptive. Even
with profileruntimelocks=0, runtime-internal locks are still profiled.
The actual difference is that call stacks are not collected. Instead all
contention is reported at runtime._LostContendedLock.
Rename this setting to runtimecontentionstacks to make its name more
aligned with its behavior.
In addition, for this release the default is profileruntimelocks=0,
meaning that users are fairly likely to encounter
runtime._LostContendedLock. Rename it to
runtime._LostContendedRuntimeLock in an attempt to make it more
intuitive that these are runtime locks, not locks in application code.
For #57071.
Change-Id: I38aac28b2c0852db643d53b1eab3f3bc42a43393
Reviewed-on: https://go-review.googlesource.com/c/go/+/547055
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
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Use a test-local directory for GOCACHE in "cover_statements" script
test, as a workaround for issue 64014.
For the portion of this test that verifies that caching works
correctly, the cache should theoretically always behave
reliably/deterministically, however if other tests are concurrently
accessing the cache while this test is running, it can lead to cache
lookup failures, which manifest as a flaky failure. To avoid such
flakes, use a separate isolated GOCACHE for this test.
For #64014.
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Add a small release note blurb to describe the changes in CL 495447
relating to "go test -cover" runs on packages with functions but no
tests.
For #61422.
Change-Id: Ib8163ac70b902f0d7f9f470b944e7f70711e3cf3
Reviewed-on: https://go-review.googlesource.com/c/go/+/547635
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Change-Id: I41ea06018daae2c929edc24a714007cede9296ed
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Reviewed-by: Keith Randall <khr@google.com>
For #53693.
Change-Id: I360f5cb9caf5fa77267a100eebcc282955677abe
Reviewed-on: https://go-review.googlesource.com/c/go/+/547755
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For #62039.
Change-Id: Id19a4c06489ad24dc44c7caf2405d155d96c6fcb
Reviewed-on: https://go-review.googlesource.com/c/go/+/547695
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Better order in description of changes to go/types.
Move go/types section up so it's in alphabetical order again.
No changes to actual content.
Change-Id: If2f085b665b412489e5dfdba79b7f93598ff2785
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Also, add some missing <code></code> tags.
For #63223.
Change-Id: I570b82be830b3c124420c5715ab1165ca53725f9
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For #62037.
Change-Id: Id1d02f88205e5ea62662e78c8313731ec9e55b1e
Reviewed-on: https://go-review.googlesource.com/c/go/+/546975
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For #61035.
Change-Id: I27e2c44f9275b508d9dccc50da80896384a4c8fc
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For #62605.
Change-Id: I3c06b835c874c1be5aa5293e3906bdd06c021d87
Reviewed-on: https://go-review.googlesource.com/c/go/+/546836
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When I was plumbing min/max support through the compiler, I was
thinking mostly about numeric argument types. As a result, I forgot
that escape analysis would need to be aware that min/max can operate
on string values, which contain pointers.
Fixes#64565.
Change-Id: I36127ce5a2da942401910fa0f9de922726c9f94d
Reviewed-on: https://go-review.googlesource.com/c/go/+/547715
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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The api.txt changes were originally recorded by mistake (sorry)
into go1.21.txt; see CL 504915, which made the actual change
in August.
Change-Id: If46b48d9714f01605888a6e975c1a03ccfce3b3e
Reviewed-on: https://go-review.googlesource.com/c/go/+/547637
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
Commit-Queue: Alan Donovan <adonovan@google.com>
