This change brings back a minor optimization lost in the Go 1.22 cycle
wherein the 8-byte pointer-ful span class spans would have the pointer
bitmap written ahead of time in bulk, because there's only one possible
pattern.
│ before │ after │
│ sec/op │ sec/op vs base │
MallocTypeInfo8-4 25.13n ± 1% 23.59n ± 2% -6.15% (p=0.002 n=6)
Change-Id: I135b84bb1d5b7e678b841b56430930bc73c0a038
Reviewed-on: https://go-review.googlesource.com/c/go/+/614256
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
For whatever reason, span.heapBits is kind of slow. It accounts for
about a quarter of the cost of writeHeapBitsSmall, which is absurd. We
get a nice speed improvement for small allocations by eliminating this
call.
│ before │ after │
│ sec/op │ sec/op vs base │
MallocTypeInfo16-4 29.47n ± 1% 27.02n ± 1% -8.31% (p=0.002 n=6)
Change-Id: I6270e26902e5a9254cf1503fac81c3c799c59d6a
Reviewed-on: https://go-review.googlesource.com/c/go/+/614255
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
Extendible hashing splits a swisstable map into many swisstables. This
keeps grow operations small.
For #54766.
Cq-Include-Trybots: luci.golang.try:gotip-linux-ppc64_power10,gotip-linux-amd64-longtest-swissmap
Change-Id: Id91f34af9e686bf35eb8882ee479956ece89e821
Reviewed-on: https://go-review.googlesource.com/c/go/+/604936
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@google.com>
This allows PCALIGN to be used in the end-to-end assembly
tests without causing an error due to missing file position.
Change-Id: Iadea2875854ffd544a963acd21293dc9840da2d0
Reviewed-on: https://go-review.googlesource.com/c/go/+/620635
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
When the root user belongs to a special user group
(for example, in a mock environment), TestSetuidEtc will fail.
For example: Setegid(1)
want:"Gid: 0 1 0 1"
got:"Gid: 1001 1 1001 1"
Fixes#69921
Change-Id: I74d0a006b7529b1b569120a067eb4d7c4ed2e491
GitHub-Last-Rev: 5724383eb1
GitHub-Pull-Request: golang/go#69922
Reviewed-on: https://go-review.googlesource.com/c/go/+/620775
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Based on the benchmarks in github.com/cockroachlabs/swiss.
For #54766.
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest-swissmap
Change-Id: I9ad925d3272c671e21ec04eb2da5ebd8f0fc6a28
Reviewed-on: https://go-review.googlesource.com/c/go/+/596295
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
src/runtime/testdata/testprogcgo/threadprof.go contains C code with a
variable called nullptr. This conflicts with the nullptr keyword in
the C23 revision of the C standard (showing up as gccgo test build
failures when updating GCC to use C23 by default when building C
code).
Rename that variable to nullpointer to avoid the clash with the
keyword (any other name that's not a keyword would work just as well).
Change-Id: Ida5ef371a3f856c611409884e185c3d5ded8e86c
GitHub-Last-Rev: 2ec464703b
GitHub-Pull-Request: golang/go#69927
Reviewed-on: https://go-review.googlesource.com/c/go/+/620955
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Fixes#69836
Change-Id: Ide243c2aa9c6f9d45976f728f97e32c4fbadb720
Reviewed-on: https://go-review.googlesource.com/c/go/+/619316
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
This worsens debugging, but improves performance.
Change-Id: I7f3c0d174823b3de412478f9537adc61ae4c076e
Reviewed-on: https://go-review.googlesource.com/c/go/+/620219
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Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
CL 618836 introduces a regression where O_APPEND and O_TRUNC could
not be used together on Windows.
This CL fixes the issue by keeping the write access when O_TRUNC is used
, which is required when overwriting data (as per the file
access rights docs: https://learn.microsoft.com/en-us/windows/win32/fileio/file-access-rights-constants).
Fixes#69902.
Change-Id: I77ec60ca6929124dd4490bdad6c3280c4db3efcb
Reviewed-on: https://go-review.googlesource.com/c/go/+/620575
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
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Reviewed-by: Damien Neil <dneil@google.com>
"time.AppendText" returns error messages that start with the prefix
"time.MarshalText: " which seems confusion.
Now correct the message prefix to "time.AppendText: " and add a test
to prevent regression.
Change-Id: I5742c9c3ed802eb79c65d459910deae4f3652ffd
GitHub-Last-Rev: ce965595c1
GitHub-Pull-Request: golang/go#69914
Reviewed-on: https://go-review.googlesource.com/c/go/+/620597
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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The compiler hasn't emitted indexed export data files since go1.19,
so this code, which is only statically reachable from
go/importer.For("gc") aka importer.Default(), is not dynamically
reachable since those files will not be in indexed format.
Updates #68898
Change-Id: I12ea4e1b88da4fffdc9a07f318b9445a61e0d02b
Reviewed-on: https://go-review.googlesource.com/c/go/+/620135
Reviewed-by: Robert Findley <rfindley@google.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
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Fixes#69890
Change-Id: I1da4eb76c008679a687f4faa4294fe32b5fc7f42
Reviewed-on: https://go-review.googlesource.com/c/go/+/620236
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
This commit fixes the issue where tls testdata recordings made with the
newer version of the prerecorded tls conversation test harness, doesn't
end up capturing the final close notify message. The fix simply ensures
that the tls.Client closes before the recording of the conversation is
closed. The closing of the client connection directly is no longer
needed when updating the recording since it will be closed when the
tls.Client is closed.
Fixesgolang/go#69846
Change-Id: I93898de32abd89659a32ed240df6daea5aeaa7fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/620395
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Auto-Submit: Filippo Valsorda <filippo@golang.org>
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Refactor TestOpenError to use relative paths in test cases,
in preparation for extending it to test os.Root.
Use a test temporary directory instead of system directory
with presumed-known contents.
Move the testcase type and case definitions inline with the test.
For #67002
Change-Id: Idc53dd9fcecf763d3e4eb3b4643032e3003d7ef4
Reviewed-on: https://go-review.googlesource.com/c/go/+/620157
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Change-Id: I0fccb18b2d5d3f7c86f026c988f90734546f7be0
GitHub-Last-Rev: a72cfe970e
GitHub-Pull-Request: golang/go#69856
Reviewed-on: https://go-review.googlesource.com/c/go/+/619056
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Auto-Submit: Dmitri Shuralyov <dmitshur@google.com>
Mkdirat does not close the handle returned by CreateFile, but it should.
Mkdirat has been introduced in this developer cycle, so it is not
necessary to backport this fix to any release branch.
Change-Id: Icddac5ccdc6a142a5be5392a39aba2ae7cc9c69a
Reviewed-on: https://go-review.googlesource.com/c/go/+/620195
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Quim Muntal <quimmuntal@gmail.com>
Use the new SwissTable-based map in internal/runtime/maps as the basis
for the runtime map when GOEXPERIMENT=swissmap.
Integration is complete enough to pass all.bash. Notable missing
features:
* Race integration / concurrent write detection
* Stack-allocated maps
* Specialized "fast" map variants
* Indirect key / elem
For #54766.
Cq-Include-Trybots: luci.golang.try:gotip-linux-ppc64_power10,gotip-linux-amd64-longtest-swissmap
Change-Id: Ie97b656b6d8e05c0403311ae08fef9f51756a639
Reviewed-on: https://go-review.googlesource.com/c/go/+/594596
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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The Ticker Stop and Reset methods don't report a value,
so we don't need to track whether they are interrupting a send.
This includes a test that used to fail about 2% of the time on
my laptop when run under x/tools/cmd/stress.
Change-Id: Ic6d14b344594149dd3c24b37bbe4e42e83f9a9ad
Reviewed-on: https://go-review.googlesource.com/c/go/+/620136
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Auto-Submit: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Change-Id: Id22ad7c92c54bc61f1f1d5544f17208f2f8648aa
GitHub-Last-Rev: 61eee331dc
GitHub-Pull-Request: golang/go#69866
Reviewed-on: https://go-review.googlesource.com/c/go/+/619836
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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This allows for more efficient use of memory.
Change-Id: I16f399a25c23b804e55289ca055fa83ea9862f16
GitHub-Last-Rev: 19bb96a7cf
GitHub-Pull-Request: golang/go#69841
Reviewed-on: https://go-review.googlesource.com/c/go/+/618960
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Michael Matloob <matloob@golang.org>
Change-Id: I66199995ca34c92aeb8234b43cb2166f2976c903
Reviewed-on: https://go-review.googlesource.com/c/go/+/619735
Auto-Submit: Damien Neil <dneil@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Damien Neil <dneil@google.com>
Windows versions of openat and mkdirat,
implemented using NtCreateFile.
For #67002
Change-Id: If43b1c1069733e5c45f7d45a69699fec30187308
Reviewed-on: https://go-review.googlesource.com/c/go/+/619435
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
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The PR is to add more details for the error, so that it would be easier to troubleshoot the cyclic imports error.
The change for the error looks like the following:
package cyclic-import-example
imports cyclic-import-example/packageA from /Users/personal/cyclic-import-example/main.go:4:5
imports cyclic-import-example/packageB from /Users/personal/cyclic-import-example/packageA/a.go:5:2
imports cyclic-import-example/packageA from /Users/personal/cyclic-import-example/packageB/bb.go:5:2: import cycle not allowed
Fixes#66078
Change-Id: I162cd348004bf4e4774b195f8355151c1bf0a652
GitHub-Last-Rev: c5a16256d1
GitHub-Pull-Request: golang/go#68337
Reviewed-on: https://go-review.googlesource.com/c/go/+/597035
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
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syscall.SyscallX consumes a lot of stack space, which is a problem
because they are nosplit functions. They used to use less stack space,
but CL 563315, that landed in Go 1.23, increased the stack usage by a
lot.
This CL reduces the stack usage back to the previous level.
Fixes#69813.
Change-Id: Iddedd28b693c66a258da687389768055c493fc2e
Reviewed-on: https://go-review.googlesource.com/c/go/+/618497
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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This is similar to CL 478196 and CL 477296,
but this is for -buildmode=shared.
When using "go install -buildmode=shared std",
because the gold linker is used by default on Linux arm64,
it will cause temporary paths to be included in libstd.so.
Based on the changes of CL 478196,
I speculate that this may also have issues on other platforms.
So, this change is for all platform.
Fixes#69464
Change-Id: I4493c82be030186e61aef597ea0e6f43bcf95a32
GitHub-Last-Rev: ee40cf81ac
GitHub-Pull-Request: golang/go#69394
Reviewed-on: https://go-review.googlesource.com/c/go/+/612396
Reviewed-by: Michael Matloob <matloob@golang.org>
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Reviewed-by: David Chase <drchase@google.com>
syscall.Open was artificially limiting the flags that were eligible
to open directories on Windows. This change extend the cases where we
pass FILE_FLAG_BACKUP_SEMANTICS to all flag combinations allowed by
Unix.
Change-Id: Ia7c083bcba070f92ea61c6d67487bdefd0d99546
Reviewed-on: https://go-review.googlesource.com/c/go/+/619295
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Reviewed-by: Damien Neil <dneil@google.com>
syscall.Open param names are confusing, mainly because what should be
named flag is named mode and what should be named mode is named perm.
The name perm is used as synonym for mode in other places, so keep
it as is. Rename mode to flag to match the real meaning of the
parameter. Also, rename path to name for consistency with other
usage of the same parameter.
Change-Id: Ideed09839d80c0383584c2268afbb6cc09ffda8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/619276
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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Change-Id: Ibbd2bda7ff2ea3c782ad41f6f00ad62849a4f066
Reviewed-on: https://go-review.googlesource.com/c/go/+/618756
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Auto-Submit: Ian Lance Taylor <iant@google.com>
syscall.Open is the functions that maps Unix/Go flags into Windows
concepts. Part of the flag validation logic was still implemented
in os.OpenFile, move it to syscall.Open for consistency.
A nice side effect is that we don't have to translate the file name
twice in case of an access denied error.
Change-Id: I32c647a9a2a066277c78f53bacb45fb3036f6353
Reviewed-on: https://go-review.googlesource.com/c/go/+/619275
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Reviewed-by: Ian Lance Taylor <iant@google.com>
This matches the style we use for the current spec.
Change-Id: I82ad8e9994da1c74801f3c18f32f21fdd7ac355a
Reviewed-on: https://go-review.googlesource.com/c/go/+/619476
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Bypass: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Fixes#69788
Change-Id: I43cc4c0dc3c8aa2474cba26c84714d00828de08e
Reviewed-on: https://go-review.googlesource.com/c/go/+/619176
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Bypass: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Change-Id: Id22d199ea4b0a9795dc3d9e5f7a74be13ff0cf58
Reviewed-on: https://go-review.googlesource.com/c/go/+/618755
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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The expand-calls pass assumed that tail calls were always done in the
entry block. That used to be true, but with tail calls in wrappers
(enabled by CL 578235) and libfuzzer instrumentation, that is no
longer the case. Libfuzzer instrumentation adds an IF statement to the
start of the wrapper function.
Fixes#69825
Change-Id: I9ab7133691d8235f9df128be39bff154b0b8853b
Reviewed-on: https://go-review.googlesource.com/c/go/+/619075
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Reviewed-by: Keith Randall <khr@google.com>
This causes programs that use 'go' as a subprocess to use the same go
command as the parent 'go run' command.
Fixes#68005
Change-Id: I937cef474bf038a925bb74fc73e5f377b03e27b7
GitHub-Last-Rev: 9986537cad
GitHub-Pull-Request: golang/go#68040
Reviewed-on: https://go-review.googlesource.com/c/go/+/593255
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Reviewed-by: Michael Matloob <matloob@golang.org>
The current implementation of O_TRUNC in syscall.Open on Windows is
prone to TOCTOU issues, as it opens the file twice if the first open
detects that the file doesn't exist. The file could
be created in between the two open calls, leading to the creation
of a new file with the undesired readonly attribute.
This CL implements O_TRUNC by just calling CreateFile once without
taking O_TRUNCATE into account, and then using Ftruncate if O_TRUNC is
set to truncate the file.
Updates #38225.
Change-Id: Ic3ad1bab75c9a1c16f99c8c5bed867c5dbc3a23b
Reviewed-on: https://go-review.googlesource.com/c/go/+/618836
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Ftruncate can be implemented on Windows using a single syscall. This
makes the implementation more efficient and less prone to races when
used in combination with other Seek calls.
Change-Id: I5d9f780fba2710403fce89d3325e519f33ad9ae8
Reviewed-on: https://go-review.googlesource.com/c/go/+/618835
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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For #54766.
Cq-Include-Trybots: luci.golang.try:gotip-linux-ppc64_power10
Change-Id: I0a928c4b1e90056c50d2abca8982bdb540c33a34
Reviewed-on: https://go-review.googlesource.com/c/go/+/619035
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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Auto-Submit: Michael Pratt <mpratt@google.com>
Add a new package that will contain a new "Swiss Table"
(https://abseil.io/about/design/swisstables) map implementation, which
is intended to eventually replace the existing runtime map
implementation.
This implementation is based on the fabulous
github.com/cockroachdb/swiss package contributed by Peter Mattis.
This CL adds an hash map implementation. It supports all the core
operations, but does not have incremental growth.
For #54766.
Change-Id: I52cf371448c3817d471ddb1f5a78f3513565db41
Reviewed-on: https://go-review.googlesource.com/c/go/+/582415
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Change-Id: I9d39984b6b15d415189592b592de471f50b43d0b
Reviewed-on: https://go-review.googlesource.com/c/go/+/618495
Reviewed-by: Michael Matloob <matloob@golang.org>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
