Follow-up on CL 551095.
For #56010.
Change-Id: I8913d6ca96c419c81683e88c6286b05ae1323416
Reviewed-on: https://go-review.googlesource.com/c/go/+/552915
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For #56010.
Change-Id: Icca987a03d80587dd0e901f596ff7788584893ed
Reviewed-on: https://go-review.googlesource.com/c/go/+/551095
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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Add a new section to the Appendix describing what features were
changed or added in which language version.
Add short links with references to the required language version
where relevant.
Fixes#63857.
Change-Id: I5250f856d8688a71602076fcc662aa678d96a5d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/549518
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Commit generated by update.bash.
For #22487.
Change-Id: I4c8a275bb607981c21a0ad5e49b3cae968fc8e64
Reviewed-on: https://go-review.googlesource.com/c/go/+/552575
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Fix rendering of link to runtime/debug.ReadGCStats in package overview:
as the package is not imported we must specify the absolute package
name.
Change-Id: I123db49eee05e6812427e19873e628b4e4feb203
Reviewed-on: https://go-review.googlesource.com/c/go/+/549735
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Found by codespell.
Change-Id: I38254f75a8d342a48bbaf6421c681bef7a262dec
Reviewed-on: https://go-review.googlesource.com/c/go/+/551955
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CL 549796 adds race annotations to godebugInc. It uses racerelease
to model a CompareAndSwap. However, a CompareAndSwap is
essentially a load and a store. Modeling it as just racerelease
makes it not synchronized with other racerelease, i.e. other CAS.
For the following execution
thread A B
load, got nil
load, got nil
set *inc
set *inc
racerelease
CAS success
racerelease
CAS fail
load
raceacquire
use *inc (from A)
On thread B, the raceacquire synchronizes with the previous
racerelease, which is not synchronized with racerelease on thread
A, so it doesn't know that the use of *inc on thread B is after
the set on thread A, and will report a race.
Change it to use racereleasemerge, which synchronizes with
previous racerelease and racereleasemerge. So in the case above it
knows thread B's CAS is after thread A's.
Also remove stale comment that was more relevant when the code
used atomic store, where CL 549796 changed to CAS.
Updates #64649.
Change-Id: I17671090a19c0699fcb4e6481e2abd98ef2e5542
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The input index to a jump table can be out of range for unreachable code.
Dynamically the compiler ensures that an out-of-range index can never
reach a jump table, but that guarantee doesn't extend to the static
realm.
Fixes#64826
Change-Id: I5829f3933ae5124ffad8337dfd7dd75e67a8ec33
Reviewed-on: https://go-review.googlesource.com/c/go/+/552055
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cmd/vet no longer reports loopclosure bugs within files built at
GoVersion>=1.22.
For #61422.
Change-Id: I6f29373bb236822ece4e7ae35914859538b8d57b
Reviewed-on: https://go-review.googlesource.com/c/go/+/551376
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The valid conversions consider the core types of operands, not just
their underlying type.
This also explains the valid arguments for unsafe.Slice which are
explained in terms of unsafe.Pointer conversions.
unsafe.SliceData simply refers to "slice argument" and we use
similar terminology elsewhere in the spec to denote values that
have a core type of slice (or any other type for that matter).
Leaving alone for now.
Fixes#64452.
Change-Id: I0eed3abbc0606f22358835e5d434f026fe0909c8
Reviewed-on: https://go-review.googlesource.com/c/go/+/551379
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This patch comments out the remaining "TODO" items in the Go 1.22
release notes temporarily, so as to have RC1 go out with the notes
in a clean (TODO-less) state.
Change-Id: I88f5fef75860fc78b8077dce704ae71c6194a6a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/551257
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This support was removed in CL 518776.
For #61422.
Fixes#53327.
Change-Id: I8ad0f76aed5f03e32c4c2c5c0001c3f06beb3c7d
Reviewed-on: https://go-review.googlesource.com/c/go/+/548877
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For #61422.
Updates #60915.
Change-Id: Ia8ca12c163a02223b26c5e4cd4c1b6093978aba4
Reviewed-on: https://go-review.googlesource.com/c/go/+/548875
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This caused other problems, and for the purposes of the Go 1.22
release, we can just roll back to the Go 1.21 behavior and then
decide in January what the correct path forward is.
Revert of CL 546635.
Unfixes #64282.
Fixes#64738.
For #57001.
This reverts commit e44b8b15b1.
Change-Id: I78753c76dcd0bc6dbc90caa17f73248c42e5f64a
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Per the discussion on the issue, since no problems related to this
appeared since Go 1.20, remove the ability to disable the check for
anonymous interface cycles permanently.
Adjust various tests accordingly.
For #56103.
Change-Id: Ica2b28752dca08934bbbc163a9b062ae1eb2a834
Reviewed-on: https://go-review.googlesource.com/c/go/+/550896
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Add a skip for this test that effectively disables it for 32-bit platforms,
so as to not run into timeouts or OOMs on smaller machines.
Fixes#64789.
Change-Id: I2d428e1dccae62b8bb1a69c5f95699692a282bbb
Reviewed-on: https://go-review.googlesource.com/c/go/+/550975
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Also, add EVP_aead_aes_*_gcm_tls13 to the build, which we will need in a
following CL, to avoid rebuilding the syso twice.
Updates #64717
Updates #62372
Change-Id: Ie4d853ad9b914c1095cad60694a1ae6f77dc22ce
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This reverts commit https://go.dev/cl/c/go/+/549297
Reason for revert: breaks clang builder
Change-Id: I2321dec9bc1fc20dfafa8a984303b0b5710f8aac
Reviewed-on: https://go-review.googlesource.com/c/go/+/550779
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go get golang.org/x/tools@83bceaf2 # CL 550395
go mod tidy
go mod vendor
Fixes#64786
Change-Id: Ia9879975eb3e8e4130ded7b2d8ba1277b5811eec
Reviewed-on: https://go-review.googlesource.com/c/go/+/550895
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The @feat.00 comment is outdated, as Go does support SEH on
windows/amd64. While here, simplify it and add a link to the
relevant documentation.
Change-Id: I6e3c786ca4f4809baf46015edf569d06b12f1239
Reviewed-on: https://go-review.googlesource.com/c/go/+/550635
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As of CL 461956 `recover` will not return `nil` if `panic` is called with `nil`. I have updated comments of `recover` to account for this change.
Change-Id: Ibd0b27fe9b89fb29349b62ad34e762239a1d165b
GitHub-Last-Rev: c773abb75c
GitHub-Pull-Request: golang/go#64393
Reviewed-on: https://go-review.googlesource.com/c/go/+/544975
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Clang 16 introduced a more aggressive behavior regarding uninitialized
memory in the memory sanitizer.
The new option -fsanitize-memory-param-retval is enabled by default
and makes the test msan8 fail, since it uses an
uninitialized variable on purpose.
Disable this behavior if we are running with clang 16+.
Fixes#64616
Change-Id: If366f978bef984ea73f6ae958f24c8fce99b59fe
GitHub-Last-Rev: 60bd64a8fb
GitHub-Pull-Request: golang/go#64691
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Also fix its call site in internal/poll to pass the length of the
actual buffer instead of an unrelated variable, and update the
definition of FILE_BASIC_INFO to match the documented field types
and add padding that is empirically needed on the 386 architecture.
Passing a pointer to a Go-allocated buffer as type uintptr violates
the unsafe.Pointer conversion rules, which allow such a conversion
only in the call expression itself for a call to syscall.Syscall or
equivalent. That can allow the buffer to be corrupted arbitrarily if
the Go runtime happens to garbage-collect it while the call to
SetFileInformationByHandle is in progress.
The Microsoft documentation for SetFileInformationByHandle specifies
its third argument type as LPVOID, which corresponds to Go's
unsafe.Pointer, not uintptr.
Fixes#58933 (maybe).
Change-Id: If577b57adea9922f5fcca55e46030c703d8f035c
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This test was added to check new mutex profile functionality.
Specifically, it checks to make sure that the functionality behind
GODEBUG=runtimecontentionstacks works. The runtime currently tracks
contention from runtime-internal mutexes in mutex profiles, but it does
not record stack traces for them, attributing the time to a dummy
symbol. This GODEBUG enables collecting stacks.
Just disable the test. Even if this functionality breaks, it won't
affect Go users and it'll help keep the builders green. It's fine to
leave the test because this will be revisited in the next dev cycle.
For #64253.
Change-Id: I7938fe0f036fc4e4a0764f030e691e312ec2c9b5
Reviewed-on: https://go-review.googlesource.com/c/go/+/550775
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Currently, lock ranking doesn't really try to model rwmutex. It records
the internal locks rLock and wLock, but in a subpar fashion:
1. wLock is held from lock to unlock, so it works OK, but it conflates
write locks of all rwmutexes as rwmutexW, rather than allowing
different rwmutexes to have different rankings.
2. rLock is an internal implementation detail that is only taken when
there is contention in rlock. As as result, the reader lock path is
almost never checked.
Add proper modeling. rwmutexR and rwmutexW remain as the ranks of the
internal locks, which have their own ordering. The new init method is
passed the ranks of the higher level lock that this represents, just
like lockInit for mutex.
execW ordered before MALLOC captures the case from #64722. i.e., there
can be allocation between BeforeFork and AfterFork.
For #64722.
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Right shift by 0 has bad semantics. Make sure if we try to right shift by 0,
do a left shift by 0 instead.
CL 549955 handled full instructions with this strange no-op encoding.
This CL handles the shift done to instruction register inputs.
(The former is implemented using the latter, but not until deep
inside the assembler.)
Update #64715
Change-Id: Ibfabb4b13e2595551e58b977162fe005aaaa0ad1
Reviewed-on: https://go-review.googlesource.com/c/go/+/550335
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Also use CompareAndSwap to make the code actually less racy.
Added a test which will be meaningful when run under the race
detector (tested it -race with broken fix in runtime, it failed).
Fixes#64649
Change-Id: I5972e08901d1adc8ba74858edad7eba91be1b0ce
Reviewed-on: https://go-review.googlesource.com/c/go/+/549796
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Right shifts, for some odd reasons, can encode shifts of constant
1-32 instead of 0-31. Left shifts, however, can encode shifts 0-31.
When the shift amount is 0, arm recommends encoding right shifts
using left shifts.
Fixes#64715
Change-Id: Id3825349aa7195028037893dfe01fa0e405eaa51
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API questions remain, so we decided to back it out for Go 1.22.
Code still lives in the repo, just unexported.
For #61642.
Change-Id: Iccd91b0da48ae72dec9f660476826a220c7ca4be
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When the argument to 'go install' or 'go run' looks like a versioned
package, we make a best effort to switch to a toolchain compatible
with the module containing that package, by fetching its go.mod file
and checking the go version it specifies.
At this point in the code, we have not yet parsed the arguments given
on the command line: instead, we just make a best effort to find one
we can use to select a toolchain version. Since that toolchain may be
newer, the command to install it may also include flags that are only
supported by that Go version — and we don't want to fail due to an
error that would be resolved by switching to a more appropriate
toolchain.
So at this point in the code we can't parse the flags in a way that
will surface errors, but we want to make a best effort to parse the
ones that we know about. It turns out that “parse the flags we know
about” is already a familiar problem: that's also what we do in
'go test', so we can reuse the cmdflag library from that to do the
best-effort pass of parsing.
If it turns out that we don't need to switch toolchains after all,
cmd/go's main function will parse the flags again, and will report any
errors at that point.
This fixes a regression, introduced in CL 497879, which caused
'go install -modcacherw pkg@version' to unset the write bit for
directories created while selecting the toolchain to use.
Fixes#64282.
Updates #57001.
Change-Id: Icc409c57858aa15c7d58a97a61964b4bc2560547
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In gitRepo.stat, we were checking ref != "" twice,
which confused me during casual reading because it made it seem like
the string could be empty when it actually never is.
For #56881.
Change-Id: Ib83303a149ea771399cb55fedd5dfa02ad411ff0
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This works around a bug in 'git http-backend' that was fixed in
Git 2.34.0,¹ and will hopefully allow the tests in
cmd/go/internal/modfetch/codehost to pass reliably using older
Git releases (I tested with 2.30.2).
¹ff6a37c99eFixes#56881.
Change-Id: Icd2e4d252d5f712685d146f34e11922dd0c41ff0
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For #58808
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For #61422.
Change-Id: Icc1868ef9516766d0f422849866ef8de27bfa4c5
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This commit is aimed at improving the readability and consistency
of the code base. Extraneous newline characters were present after
some return statements, creating unnecessary separation in the code.
Fixes#64610
Change-Id: Ic1b05bf11761c4dff22691c2f1c3755f66d341f7
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For #64207.
For #23011.
Change-Id: I17ff221718aef03e9cda0ae4eb7b79896933553a
Reviewed-on: https://go-review.googlesource.com/c/go/+/549655
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Add some material to the "compiler" portion of the release
notes describing the 1.22 changes to the inliner.
For #61422.
Updates #61502.
Change-Id: Ic7f1cb7f70752446d2465ea3da6bd7488436342b
Reviewed-on: https://go-review.googlesource.com/c/go/+/549395
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
When generic function[a,b] is inlined to the same generic function[b,a]
with different types (not recursion) it is expected to get a pprof with
a single Location with two functions. However due to incorrect check
for generics names using runtime.Frame.Function, the profileBuilder
assumes it is a recursion and emits separate Location.
This change fixes the recursion check for generics functions by using
runtime_expandFinalInlineFrame
Fixes#64641
Change-Id: I3f58818f08ee322b281daa377fa421555ad328c9
Reviewed-on: https://go-review.googlesource.com/c/go/+/549135
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
