In rare situations, like during same-sized grows, the source map for
maps.Clone may be overloaded (has more than 6.5 entries per
bucket). This causes the runtime to allocate a larger bucket array for
the destination map than for the source map. The maps.Clone code
walks off the end of the source array if it is smaller than the
destination array.
This is a pretty simple fix, ensuring that the destination bucket
array is never longer than the source bucket array. Maybe a better fix
is to make the Clone code handle shorter source arrays correctly, but
this fix is deliberately simple to reduce the risk of backporting this
fix.
Fixes#69110
Change-Id: I824c93d1db690999f25a3c43b2816fc28ace7509
Reviewed-on: https://go-review.googlesource.com/c/go/+/609757
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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NOFRAME is long since implemented beyond ppc64x.
Change-Id: Ia02c732badc3330bf876723bb64eff390f3e6622
Reviewed-on: https://go-review.googlesource.com/c/go/+/610695
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Auto-Submit: Michael Pratt <mpratt@google.com>
The remaining capacity of dst should not overlap ciphertext.
The previous wording was probably a copy paste mistake from aead Seal.
Change-Id: Iaa28073f9ea90cbe2032c0c1149a78feab6c9239
GitHub-Last-Rev: fb54bc84c4
GitHub-Pull-Request: golang/go#69108
Reviewed-on: https://go-review.googlesource.com/c/go/+/609075
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Filippo Valsorda <filippo@golang.org>
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This CL adds trunc,ceil,floor tests for large exact float.
Change-Id: Ib7ffec1d2d50d2ac955398a3dd0fd06d494fcf4f
Reviewed-on: https://go-review.googlesource.com/c/go/+/601095
Auto-Submit: Keith Randall <khr@golang.org>
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Reviewed-by: Keith Randall <khr@golang.org>
This is permitted by the XML specification.
Fixes#68387
Change-Id: Ic4ab5520a08a5a997f1c3d13c6d5f80c0521e45c
GitHub-Last-Rev: 6d2ac307bb
GitHub-Pull-Request: golang/go#69197
Reviewed-on: https://go-review.googlesource.com/c/go/+/610056
Auto-Submit: Ian Lance Taylor <iant@google.com>
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containerd deleted unsafe, golinkname usage from whole project in
the https://github.com/containerd/containerd/pull/10611. This patch is
to delete contained name in the comment.
Change-Id: Ide55ad9c65b3b622650a0b5813a7817306e87d3f
Reviewed-on: https://go-review.googlesource.com/c/go/+/609996
Auto-Submit: Ian Lance Taylor <iant@google.com>
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On Windows, the User.GroupIds currently errors out if the user has no
groups. This is incorrect, as the user may not be a member of any groups
as demonstrated by the new TestGroupIdsTestUser test.
Cq-Include-Trybots: luci.golang.try:gotip-windows-amd64-longtest,gotip-windows-arm64
Change-Id: I436aa6214f2b98ef98dfb6064caec3d682b3f3d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/606675
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
We can see ENOMEM on FreeBSD.
Also don't fail the test if we get an EPERM error when reading
all the way up the tree; on Android we get that, perhaps because
the root directory is unreadable.
Also accept an EFAULT from a stat of a long name on Dragonfly,
which we see on the builders.
Change-Id: If37e6bf414b7b568c9a06130f71e79af153bfb75
Reviewed-on: https://go-review.googlesource.com/c/go/+/610415
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Change-Id: I5bc514bedeb1155e6db52e37736fd6101774aea0
Reviewed-on: https://go-review.googlesource.com/c/go/+/529896
Auto-Submit: Ian Lance Taylor <iant@golang.org>
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Commit-Queue: Ian Lance Taylor <iant@golang.org>
Now that we're bootstrapping from a toolchain that has the clear builtin.
Update #64751
Change-Id: Ia86d96c253c9f7c66131cd02048a493047569641
Reviewed-on: https://go-review.googlesource.com/c/go/+/610237
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Now that we're bootstrapping from a toolchain that has min/max builtins.
Update #64751
Change-Id: I63eedf3cca00f56f62ca092949cb2dc61db03361
Reviewed-on: https://go-review.googlesource.com/c/go/+/610355
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Change-Id: I2e4d74a86faa95321e847a061e06c3efff7f20df
Reviewed-on: https://go-review.googlesource.com/c/go/+/605775
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Reviewed-by: Keith Randall <khr@golang.org>
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I was not sure this was correct so I exhaustively checked all possibilities:
https://go.dev/play/p/hjmCLm4Iagzhttps://go.dev/play/p/R9RuRGKwCbN
Change-Id: I85f053df825a4d77f978de42f8a1fcaf4b881def
Reviewed-on: https://go-review.googlesource.com/c/go/+/605696
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Reviewed-by: Carlos Amedee <carlos@golang.org>
Change-Id: I419faa781db085b98ea25008ca127d0317fb34e1
Reviewed-on: https://go-review.googlesource.com/c/go/+/605695
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I didn't implemented negative limits since prove is most useful for BCE which
should never be negative in the first place.
Change-Id: I302ee462cdc20bd4edff0618f7e49ff66fc2a007
Reviewed-on: https://go-review.googlesource.com/c/go/+/605136
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with slices there's no need to implement sort.Interface
Change-Id: I59167e78881cb1df89a71e33d738d6aeca7adb71
GitHub-Last-Rev: 507ba84453
GitHub-Pull-Request: golang/go#68724
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All changes are related to the code, except for the comments in src/regexp/syntax/parse.go and src/slices/slices.go.
Change-Id: I73c5d3c54099749b62210aa7f3182c5eb84bb6a6
GitHub-Last-Rev: 794aa9b053
GitHub-Pull-Request: golang/go#69170
Reviewed-on: https://go-review.googlesource.com/c/go/+/609678
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Change SimpleFold to search the CaseRanges table only once when no
folding is specified for the rune (previously up to two searches could
be performed). This improves performance by 2x for runes that have no
folds or are already upper case. As a side effect this improves the
performance of To by roughly ~15%
goos: darwin
goarch: arm64
pkg: unicode
cpu: Apple M1 Max
│ base.10.txt │ new.10.txt │
│ sec/op │ sec/op vs base │
ToUpper-10 11.860n ± 1% 9.731n ± 1% -17.95% (p=0.000 n=10)
ToLower-10 12.31n ± 1% 10.34n ± 1% -16.00% (p=0.000 n=10)
SimpleFold/Upper-10 19.16n ± 0% 15.98n ± 1% -16.64% (p=0.000 n=10)
SimpleFold/Lower-10 32.41n ± 1% 17.09n ± 1% -47.27% (p=0.000 n=10)
SimpleFold/Fold-10 8.884n ± 4% 8.856n ± 8% ~ (p=0.700 n=10)
SimpleFold/NoFold-10 30.87n ± 0% 15.49n ± 3% -49.84% (p=0.000 n=10)
geomean 17.09n 12.47n -26.99%
Change-Id: I6e5c7554106842955aadeef7b266c4c7944d3a97
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At least Darwin and OpenBSD seem to return EINVAL if the resulting
name would be too long. Solaris seems to return ERANGE.
Fixes#69233Fixes#69234
Change-Id: I9b51d41461e9576c633bf2fc0e96ca3e4d986255
Reviewed-on: https://go-review.googlesource.com/c/go/+/609579
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Instead of running all tests and relying on an init function, let's
embed the child code into the test case and only run one specific test.
Change-Id: Ib04e8a580556e7e30ff776c2041f0b809b440a26
Reviewed-on: https://go-review.googlesource.com/c/go/+/609838
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Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
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As some callers don't have a testing context, modify testenv.Executable
to accept nil (similar to how testenv.GOROOT works).
Change-Id: I39112a7869933785a26b5cb6520055b3cc42b847
Reviewed-on: https://go-review.googlesource.com/c/go/+/609835
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...and move a few so they won't be called when not needed.
Change-Id: I024b9552ed5ed839cde4fbae4815ec6ba8b67265
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On some platforms (android, wasip1) this function is called many
times which probably results in some slowdown, especially for wasip1.
Wrap it into sync.OnceValues.
Change-Id: Id290ffd8d1e7ad806302f457e8fff2e3123b49a5
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Note that this changes some nuances of how the tests work:
- some tests had a fallback to using os.Args[0], which is removed;
- some tests skipped (rather than failed) the test upon getting an
error from os.Executable.
I think these changes are not practically relevant.
Change-Id: I0655add6d959a8b7e3359f94c38203aa06e8f490
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Change-Id: I25ac0e8d25d760bfde3bb7700f0feaa23f3e8ab1
Reviewed-on: https://go-review.googlesource.com/c/go/+/609302
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Tests commonly use code to get os.Executable value, and some cache the
resulting value.
To reduce code duplication, add a helper that does just that.
Change-Id: I9dd7eb24e24a3abd92be2b87227e823f0fca5cb3
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Fixes#69159
Change-Id: I0bbcf7075bdcf7a277a5053bcb543563a3074784
GitHub-Last-Rev: 86052a9ce3
GitHub-Pull-Request: golang/go#69160
Reviewed-on: https://go-review.googlesource.com/c/go/+/609304
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Reviewed-by: Ian Lance Taylor <iant@google.com>
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Change-Id: Id522bde5bba627d9cdc8c3d8e907bdc168e5b13c
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addLocalFacts loop already ft.update which sets up limits correctly, but doing this in flowLimit help us since other values might depend on this limit.
Updates #68857
We could improve this further:
- remove mod alltogheter when we can prove a < b.
- we could do more adhoc computation in flowLimit to set umax and umin tighter
Change-Id: I5184913577b6a51a07cb53a6e6b73552a982de0b
Reviewed-on: https://go-review.googlesource.com/c/go/+/605156
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Change-Id: I6902c405cab7bd573f6a721a6ca7c783713ea39a
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This help to optimize code like this:
func f(buckets *[512]bucket, v value) {
a, b := v.computeSomething()
// assume a and b are proved < 512
b := &buckets[a ^ b] // pick a random bucket
b.store(v)
}
Change-Id: I1acf702f5a8137f9ded49081b4703922879b0288
Reviewed-on: https://go-review.googlesource.com/c/go/+/604455
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See the cases above all of theses are implemented (except XOR which has a blank case with comments).
Change-Id: I9e2994490dac89e86ba70c1abeb1af1cbcf032e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/604416
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y := bits.TrailingZeros(x)
if y > bits.Len(x.umax)-1 {
then must always be true 1 << y > x.umax which is impossible
}
Change-Id: Iab4fce1c2ef828bee3a8a4a977cbadb5f9333136
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Change-Id: I56c27d606b55ea882f4db264fd4735b0cccdf7c6
Reviewed-on: https://go-review.googlesource.com/c/go/+/604015
Reviewed-by: Keith Randall <khr@google.com>
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Change-Id: Ie3c7e5eaba6a9a29389018625c4b784d07c6f173
Reviewed-on: https://go-review.googlesource.com/c/go/+/603537
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Change-Id: I57a03961dc97d20224498a67687a8c8ecfbbb627
GitHub-Last-Rev: 07ca14263f
GitHub-Pull-Request: golang/go#69157
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As of CL 257637, all currently supported platforms have syscall.Getwd
implemented, so the code which deduces wd by traversing up to root
directory is never used and thus can be removed.
Or, as it was suggested by Ian Lance Taylor in CL 607436 review
comments, it can be reused when syscall.Getwd returns ENAMETOOLONG
(which usually happens than the current working dir is longer than
syscall.PathMax).
Let's do that. The only caveat is, such a long path returned from Getwd
couldn't be used for any file-related operations (they will probably
fail with ENAMETOOLONG).
While at it:
- make the stat(".") code conditional, slightly improving the
performance on Unix when $PWD is not set;
- reuse variables dir and err;
- use openDirNolog instead of openFileNolog to obtain a dirfd;
- ensure the errors returned are wrapped;
- document the new functionality;
- add test cases (which fail before this change).
Change-Id: I60f7a70e6ebb1751699416f587688a1a97305fd7
Reviewed-on: https://go-review.googlesource.com/c/go/+/608635
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Including embedded struct inforamtion in error message.
Fixes#68941
Change-Id: I6a6f7d506104839a9a7cf1a2c3003272f5534a79
GitHub-Last-Rev: 717f680aca
GitHub-Pull-Request: golang/go#68966
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There is one special case of (0, nil) indicating EOF where the updates
of zero to remain and written are redundant.
Change-Id: I017471657a9424fab88c72d14d3eb66d14a7e5c7
Reviewed-on: https://go-review.googlesource.com/c/go/+/609297
Run-TryBot: Andy Pan <panjf2000@gmail.com>
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TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Change-Id: Ia6a2768be0e044112831c278d88ff31ba3caa9f9
Reviewed-on: https://go-review.googlesource.com/c/go/+/609298
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
```
export CC="zig cc -target x86_64-linux"
hyperfine '../pkg/tool/darwin_arm64/cgo -objdir /tmp net/cgo_linux.go net/cgo_resnew.go net/cgo_socknew.go net/cgo_unix_cgo.go net/cgo_unix_cgo_res.go'
```
**Before**
```
Time (mean ± sig): 1.293 s ± 0.017 s [User: 0.472 s, System: 0.451 s]
Range (min ... max): 1.263 s ... 1.316 s 10 runs
```
**After**
```
Time (mean ±sig): 986.5 ms ± 22.6 ms [User: 487.0 ms, System: 519.5 ms]
Range (min ... max): 950.7 ms ... 1022.2 ms 10 runs
```
The version after changes is 25% faster for 5 input files (std "net" package).
I also tried to make CC artifictially slower (wrapper with sleep 0.2) and it showes same 25% performance increase.
Change-Id: I7a26fdc8d8a23b0df9bc71d30b96e82e2ddb943b
Reviewed-on: https://go-review.googlesource.com/c/go/+/581336
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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A previous change [1] was introduced to enable MPTCP by default
for both the clients and servers, based on the discussions [2] in
golang#56539, where MPTCP would be an opt-in for a release or
two, and then would become an opt-out.
This change was not accepted at the time because the support for
a few socket options was missing [3]. Now that this support has been
added [4] and backported to stable versions not to block MPTCP
deployment with Go, it sounds like a good time to reconsider the use
of MPTCP by default.
Instead of enabling MPTCP on both ends by default, as a first step,
it seems safer to change the default behaviour only for the server
side (Listeners). On the server side, the impact is minimal: when
clients don't request to use MPTCP, server applications will create
"plain" TCP sockets within the kernel when connections are accepted,
making the performance impact minimal. This should also ease
experiments where MPTCP is enabled by default on the client side
(Dialer).
The changes in this patch consist of a duplication of the mptcpStatus
enumeration to have both a mptcpStatusDial and a mptcpStatusListen,
where MPTCP is enabled by default in mptcpStatusListen, but disabled
by default in mptcpStatusDial. It is still possible to turn MPTCP support
on and off by using GODEBUG=multipathtcp=1.
[1] https://go-review.googlesource.com/c/go/+/563575
[2] https://go.dev/issue/56539#issuecomment-1309294637
[3] https://github.com/multipath-tcp/mptcp_net-next/issues/383
[4] bd11dc4fb9
[5] https://www.mptcp.dev/faq.html#why--when-should-mptcp-be-enabled-by-default
Updates #56539
Change-Id: I1ca0d6aaf74d3bda5468af135e29cdb405d3fd00
GitHub-Last-Rev: 5f9f29bfc1
GitHub-Pull-Request: golang/go#69016
Reviewed-on: https://go-review.googlesource.com/c/go/+/607715
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Reviewed-by: Matthieu Baerts <matttbe@kernel.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Also replace "copy of parent" with "derived context" in doc comments.
Fixes#68923
Change-Id: I319c1594f390e35b32b4e58ee979927bb84bfdf9
Reviewed-on: https://go-review.googlesource.com/c/go/+/606555
Reviewed-by: Sameer Ajmani <sameer@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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ZR is deprecated,
so replace it with the literal Rectangle to represent the zero value.
Change-Id: I68c0ffec808eaed1e8c352bf364d295c0041594e
GitHub-Last-Rev: 850472888d
GitHub-Pull-Request: golang/go#69136
Reviewed-on: https://go-review.googlesource.com/c/go/+/609516
Reviewed-by: Nigel Tao <nigeltao@golang.org>
Reviewed-by: Nigel Tao <nigeltao@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Fixes#68984
Change-Id: I16d25777cb38a337cd4204a8147eaf866c3df9e1
Reviewed-on: https://go-review.googlesource.com/c/go/+/607695
Reviewed-by: Kirill Kolyshkin <kolyshkin@gmail.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
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Change-Id: Ia53d4a58810948d83a3e87e08239602da1bad815
Reviewed-on: https://go-review.googlesource.com/c/go/+/609935
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Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Cherry Mui <cherryyz@google.com>
