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Commit Graph

52449 Commits

Author SHA1 Message Date
Than McIntosh
dd97871282 debug/dwarf: better stmt list attr checking in LineReader
Check for insane statement list attribute values when
constructing LineReader's for a compilation unit.

Fixes #52354.

Change-Id: Icb5298db31f6c5fe34c44e0ed4fe277a7cd676b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/400255
Run-TryBot: Than McIntosh <thanm@google.com>
Auto-Submit: Than McIntosh <thanm@google.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
2022-04-14 18:00:13 +00:00
Joe Tsai
62b8ec744b math: improve documentation of Copysign
Name the arguments in a way that is more self-describing.
Many code editor tools show a snippet of the function and
its arguments. However, "x" and "y" are not helpful in determining
which is the sign and which is the magnitude,
short of reading the documentation itself.

Name the sign argument as "sign" to be explicit.
This follows the same naming convention as IsInf.

Change-Id: Ie3055009e475f96c92d5ea7bfe9828eed908c78b
Reviewed-on: https://go-review.googlesource.com/c/go/+/400177
Run-TryBot: Joseph Tsai <joetsai@digital-static.net>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2022-04-14 17:42:53 +00:00
Keith Randall
cb702a2a56 cmd/compile: fold constant shifts into (SHL|SHR|SAR)Xload ops
We should prefer a constant shift op to a X shift op.
That way we don't have to materialize the constant to shift by.

Should fix GOAMD64=v3 builder

Change-Id: I56b45d2940c959382b970e3f962ed4a09cc2a239
Reviewed-on: https://go-review.googlesource.com/c/go/+/400254
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Wayne Zuo <wdvxdr@golangcn.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
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Reviewed-by: Keith Randall <khr@google.com>
2022-04-14 15:54:48 +00:00
Jorropo
d255203742 cmd/compile: remove unused offset calculation in ssagen#rtcall
This offR accumulation isn't used and some really similar code is done
later in the Load results block.

Change-Id: I2f77a7bfd568e7e5eb9fc519e7c552401b3af9b8
GitHub-Last-Rev: 2c91e5c898
GitHub-Pull-Request: golang/go#52316
Reviewed-on: https://go-review.googlesource.com/c/go/+/400094
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2022-04-13 20:30:44 +00:00
zhangyunhao
72e77a7f41 sort: use pdqsort
- Across all benchmarks, pdqsort is never significantly slower than the previous algorithm.
- In common patterns, pdqsort is often faster (i.e. 10x faster in sorted slices).

The pdqsort is described at https://arxiv.org/pdf/2106.05123.pdf

This CL is inspired by both C++ implementation and Rust implementation.
- C++ implementation: https://github.com/orlp/pdqsort
- Rust implementation: https://docs.rs/pdqsort/latest/pdqsort/

For #50154

name                   old time/op  new time/op  delta
SearchWrappers-16      72.8ns ± 3%  75.1ns ± 2%   +3.25%  (p=0.000 n=20+10)
SortString1K-16        85.2µs ± 3%  86.2µs ± 5%     ~     (p=0.247 n=19+10)
SortString1K_Slice-16  84.6µs ± 4%  86.1µs ± 4%     ~     (p=0.120 n=20+10)
StableString1K-16       112µs ± 5%   112µs ± 5%     ~     (p=0.604 n=19+10)
SortInt1K-16           44.8µs ± 3%  43.2µs ± 2%   -3.68%  (p=0.000 n=20+10)
SortInt1K_Sorted-16    28.2µs ± 3%   3.3µs ± 3%  -88.16%  (p=0.000 n=19+10)
SortInt1K_Reversed-16  29.4µs ± 3%   4.8µs ± 2%  -83.59%  (p=0.000 n=20+10)
SortInt1K_Mod8-16      25.1µs ± 2%  20.0µs ± 2%  -20.35%  (p=0.000 n=18+10)
StableInt1K-16         51.3µs ± 3%  50.9µs ± 2%     ~     (p=0.562 n=20+9)
StableInt1K_Slice-16   49.5µs ± 2%  50.7µs ± 4%   +2.55%  (p=0.009 n=19+10)
SortInt64K-16          4.73ms ± 3%  4.49ms ± 4%   -5.08%  (p=0.000 n=20+10)
SortInt64K_Slice-16    4.51ms ± 3%  4.35ms ± 1%   -3.42%  (p=0.000 n=20+8)
StableInt64K-16        4.85ms ± 2%  4.82ms ± 2%     ~     (p=0.267 n=20+10)
Sort1e2-16             27.9µs ± 1%  28.1µs ± 2%     ~     (p=0.198 n=20+10)
Stable1e2-16           56.6µs ± 2%  55.0µs ± 2%   -2.88%  (p=0.000 n=20+10)
Sort1e4-16             5.51ms ± 1%  5.36ms ± 1%   -2.58%  (p=0.000 n=19+9)
Stable1e4-16           17.8ms ± 1%  17.3ms ± 1%   -2.40%  (p=0.000 n=20+10)
Sort1e6-16              833ms ± 1%   807ms ± 1%   -3.02%  (p=0.000 n=20+10)
Stable1e6-16            3.49s ± 2%   3.44s ± 1%   -1.41%  (p=0.001 n=20+10)

Change-Id: Iecded047d237b9330b5a4101001a5fdc2f50646a
Reviewed-on: https://go-review.googlesource.com/c/go/+/371574
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
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Reviewed-by: Keith Randall <khr@golang.org>
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2022-04-13 20:16:24 +00:00
Roland Shoemaker
9298f604f4 crypto/x509: add CertPool.Clone
Export the previously private method copy as Clone.

Fixes #35044

Change-Id: I5403d6a3b9f344c980c1c89a6823e1a49dcda26b
Reviewed-on: https://go-review.googlesource.com/c/go/+/400175
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2022-04-13 19:04:59 +00:00
Dmitri Shuralyov
1f11660f54 [dev.boringcrypto] misc/boring: add new releases to RELEASES file
Change-Id: I5d2d64acd501bae90e2027f55ac6398f71dafca3
Reviewed-on: https://go-review.googlesource.com/c/go/+/400157
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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2022-04-13 18:41:53 +00:00
Roland Shoemaker
d65a41329e crypto/x509: support nil pools in CertPool.Equal
Otherwise we panic if either pool is nil.

Change-Id: I8598e3c0f3a5294135f1c330e319128d552ebb67
Reviewed-on: https://go-review.googlesource.com/c/go/+/399161
Reviewed-by: Damien Neil <dneil@google.com>
Run-TryBot: Roland Shoemaker <roland@golang.org>
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2022-04-13 18:06:43 +00:00
Roland Shoemaker
a78db879b3 crypto/x509: omit empty extensions SEQUENCE
In CreateCertificate, if there are no extensions, don't include the
extensions SEQUENCE in the encoded certificate.

Why, you might ask, does the encoding/asn1 tag 'optional' not do
the same thing as 'omitempty'? Good question, no clue, fixing that
would probably break things in horrific ways.

Fixes #52319

Change-Id: I84fdd5ff3e4e0b0a59e3bf86e7439753b1e1477b
Reviewed-on: https://go-review.googlesource.com/c/go/+/399827
Run-TryBot: Roland Shoemaker <roland@golang.org>
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2022-04-13 18:05:20 +00:00
Wayne Zuo
66f03f79da cmd/compile: add SHLX&SHRX without load
Change-Id: I79eb5e7d6bcb23f26d3a100e915efff6dae70391
Reviewed-on: https://go-review.googlesource.com/c/go/+/399061
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2022-04-13 17:48:36 +00:00
Wayne Zuo
517781b391 cmd/compile: add SARXQload and SARXLload
Change-Id: I4e8dc5009a5b8af37d71b62f1322f94806d3e9d9
Reviewed-on: https://go-review.googlesource.com/c/go/+/399056
Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
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2022-04-13 17:48:12 +00:00
Dmitri Shuralyov
bc3e5d0ab7 [dev.boringcrypto] misc/boring: remove -trust and individual reviewers
The -trust flag has become obsolete.

A list of individual reviewers may become out of date, and these
scripts (and their backports) are probably not the optimal place
for it.

Change-Id: Ibf1bc508f0192b160c955e3deabae34f4d1ab54c
Reviewed-on: https://go-review.googlesource.com/c/go/+/399538
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2022-04-13 15:20:22 +00:00
Meng Zhuo
b55a2fb3b0 runtime: port memmove, memclr to register ABI on riscv64
This allows memmove and memclr to be invoked using the new
register ABI on riscv64.

Change-Id: I3308d52e06547836cffcc533740fe535624e78d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/361975
Run-TryBot: mzh <mzh@golangcn.org>
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2022-04-13 01:15:22 +00:00
hopehook
65558a4f3d cmd/asm: update comment to refer to #44505
Updates #44505

Change-Id: I400110c33e69decf133fe9c4b582a450b7258b39
Reviewed-on: https://go-review.googlesource.com/c/go/+/399514
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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2022-04-12 23:50:58 +00:00
Cherry Mui
9c7f0b1ccd cmd/link: mangle symbol ABI name for linker-generated symbols
The ABI mangling code skips symbols that are not loaded from Go
objects. Usually that is fine, as other symbols don't need name
mangling. But trampolines are linker generated and have the same
symbol version (ABI) as the underlying symbol. We need to avoid
symbol name collisions for trampolines, such as a trampoline to
f<ABI0> and a trampoline to f<ABIInternal>. We could explicitly
incorportate the ABI into the trampoline name. But as we already
have the name mangling scheme we could just use that.

The original code excludes external symbols probably because
symbols from C object don't need mangling. But a C symbol and a
Go symbol shouldn't have same name, and so the condition won't
apply.

Also exclude static symbols as they don't need mangling.

Change-Id: I298eb1d64bc0c3da0154f0146b95c4d26ca2f47a
Reviewed-on: https://go-review.googlesource.com/c/go/+/399894
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2022-04-12 23:24:32 +00:00
Keith Randall
1f97f960e7 cmd/link: don't sort pclntab entries
They are already in a good order. The sort here does nothing, as
all the SymValues are 0. Sorting just arbitrarily permutes items
because everything is equal and the sort isn't stable.

Not sure why the ordering of these symbols matter. That ordering was
added in CL 243223.

Change-Id: Iee153394afdb39387701cfe0375bc022cf4bd489
Reviewed-on: https://go-review.googlesource.com/c/go/+/399540
Run-TryBot: Keith Randall <khr@golang.org>
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Auto-Submit: Keith Randall <khr@google.com>
2022-04-12 23:13:38 +00:00
Roland Shoemaker
fc1d4c11df cmd/go: fix TestScript/test_fuzz_minimize_interesting flake
check_testdata/check_testdata.go used the encoding of the corpus entry
file, rather than the input string itself, when checking the expected
size of the minimized value. Instead, use the actual byte length, which
should bypass flakiness.

While we are here, use somewhat simpler fuzz targets, that use byte
slices rather than strings, and only execute the targets when fuzzing (
skipping the 'run' phase.)

Fixes #52285

Change-Id: I48c3780934891eec4a9e38d93abb4666091cb580
Reviewed-on: https://go-review.googlesource.com/c/go/+/399814
Run-TryBot: Roland Shoemaker <roland@golang.org>
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2022-04-12 22:35:20 +00:00
Archana R
6183920a33 math/big: Implement shlVU and shrVU in ASM for PPC64
Currently the shift left and shift right functions are coded in .go
on PPC64. Implementing them in ASM just like AMD and ARM results in
overall speedup of shift benchmarks on POWER8/9/10.

name                        old time/op  new time/op  delta
NonZeroShifts/1/shrVU       8.50ns ± 0%  5.21ns ± 0%  -38.66%
NonZeroShifts/1/shlVU       8.85ns ± 1%  5.24ns ± 0%  -40.78%
NonZeroShifts/2/shrVU       9.16ns ± 0%  5.51ns ± 0%  -39.80%
NonZeroShifts/2/shlVU       9.24ns ± 2%  5.61ns ± 0%  -39.28%
NonZeroShifts/3/shrVU       10.6ns ± 0%   6.8ns ± 0%  -35.78%
NonZeroShifts/3/shlVU       10.7ns ± 2%   6.4ns ± 0%  -40.82%
NonZeroShifts/4/shrVU       12.4ns ± 0%   7.7ns ± 0%  -38.12%
NonZeroShifts/4/shlVU       12.3ns ± 1%   7.5ns ± 0%  -38.67%
NonZeroShifts/5/shrVU       13.2ns ± 0%   8.5ns ± 0%  -35.51%
NonZeroShifts/5/shlVU       13.3ns ± 2%   9.3ns ± 0%  -30.05%
NonZeroShifts/10/shrVU      16.5ns ± 0%  13.1ns ± 0%  -20.12%
NonZeroShifts/10/shlVU      16.8ns ± 1%  14.1ns ± 0%  -16.02%
NonZeroShifts/100/shrVU      122ns ± 0%    94ns ± 0%  -22.87%
NonZeroShifts/100/shlVU      115ns ± 0%   103ns ± 0%  -10.50%
NonZeroShifts/1000/shrVU    1.10µs ± 0%  0.91µs ± 0%  -17.03%
NonZeroShifts/1000/shlVU    1.02µs ± 0%  0.93µs ± 0%   -8.74%
NonZeroShifts/10000/shrVU   10.9µs ± 0%   9.1µs ± 0%  -16.66%
NonZeroShifts/10000/shlVU   10.1µs ± 0%   9.3µs ± 0%   -8.19%
NonZeroShifts/100000/shrVU   109µs ± 0%    91µs ± 0%  -16.01%
NonZeroShifts/100000/shlVU   101µs ± 0%    94µs ± 0%   -7.16%

Change-Id: Ia31951cc29a4169beb494d2951427cbe1e963b11
Reviewed-on: https://go-review.googlesource.com/c/go/+/384474
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
2022-04-12 22:32:01 +00:00
Bryan C. Mills
d85694ab4f doc/go1.19: document cmd/go changes involving -trimpath
Updates #51461.

Change-Id: Ie878a9f630062d62027de895750a070b50428a9f
Reviewed-on: https://go-review.googlesource.com/c/go/+/399214
Run-TryBot: Bryan Mills <bcmills@google.com>
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2022-04-12 22:05:26 +00:00
Damien Neil
f66925e854 syscall: check correct group in Faccessat
The Faccessat call checks the user, group, or other permission bits of a
file to see if the calling process can access it. The test to see if the
group permissions should be used was made with the wrong group id, using
the process's group id rather than the file's group id. Fix this to use
the correct group id.

No test since we cannot easily change file permissions when not running
as root and the test is meaningless if running as root.

For #52313

Change-Id: I4e2c84754b0af7830b40fd15dedcbc58374d75ee
Reviewed-on: https://go-review.googlesource.com/c/go/+/399539
Reviewed-by: Ian Lance Taylor <iant@google.com>
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2022-04-12 21:12:19 +00:00
Bryan C. Mills
4569fe6410 cmd/go: allow '-buildvcs=auto' and treat it as the default
When we added VCS stamping in the Go 1.18 release, we defaulted to
-buildvcs=true, on the theory that most folks will actually want VCS
information stamped.

We also made -buildvcs=true error out if a VCS directory is found and
no VCS tool is available, on the theory that a user who builds with
'-buildvcs=true' will be very surprised if the VCS metadata is
silently missing.

However, that causes a problem for CI environments that don't have the
appropriate VCS tool installed. (And we know that's a common situation
because we're in that situation ourselves — see #46693!)

The new '-buildvcs=auto' setting provides a middle ground: it stamps
VCS information by default when the tool is present (and reports
explicit errors if the tool errors out), but omits the metadata
when the tool isn't present at all.

Fixes #51748.
Updates #51999.

Change-Id: Iebc955c2af0abca9b7517f62ca48b1d944eb2df4
Reviewed-on: https://go-review.googlesource.com/c/go/+/398855
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2022-04-12 20:22:45 +00:00
Wayne Zuo
6f5590edf6 cmd/compile: always write fun[0] in incomplete itab
runtime.getitab need filled fun[0] to identify whether
implemented the interface.

Fixes #51700
Fixes #52228

Change-Id: I0173b98f4e1b45e3a0183a5b60229d289140d1e6
Reviewed-on: https://go-review.googlesource.com/c/go/+/399058
Reviewed-by: Keith Randall <khr@golang.org>
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Reviewed-by: David Chase <drchase@google.com>
2022-04-12 17:06:19 +00:00
tenkoh
5bf6c97e76 cmd/go: open correct path when loading embeds from root directory
The existing implementation of `load.resolveEmbed`
uses an expression like `path[len(pkgdir)+1:]`.
Though the `+1` is intended to remove a prefix slash,
the expression returns an incorrect path when `pkgdir`
is "/". (ex.: when removing "/" from "/foo", want "foo",
but got "oo")

It seems that `str.TrimFilePathPrefix` would solve
the problem, but the function contains the same bug.

So, this commit fixes `str.TrimFilePathPrefix` then
applies it to `load.resolveEmbed` to solve the issue.
The fix is quite simple. First, remove prefix. Then
check whether the remained first letter is equal to
`filepath.Separator`. If so, remove it then return.

Fixed #49570

Change-Id: I26ab727ee4dfcbf51ed9bd0a573957ced2154515
Reviewed-on: https://go-review.googlesource.com/c/go/+/396694
Reviewed-by: Bryan Mills <bcmills@google.com>
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2022-04-12 16:47:01 +00:00
Tobias Klauser
8f1d5d0a41 cmd/go/internal/modload: remove aix from stat_openfile.go comment
syscall.Access is supported and used on aix since CL 263540.

Change-Id: Ie50cc3da68b49b22d622d94faec0231c52502037
Reviewed-on: https://go-review.googlesource.com/c/go/+/396374
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2022-04-12 16:45:11 +00:00
Julie Qiu
45c3387d77 encoding/pem: fix stack overflow in Decode
Previously, Decode called decodeError, a recursive function that was
prone to stack overflows when given a large PEM file containing errors.

Credit to Juho Nurminen of Mattermost who reported the error.

Fixes CVE-2022-24675
Fixes #51853

Change-Id: Iffe768be53c8ddc0036fea0671d290f8f797692c
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1391157
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Filippo Valsorda <valsorda@google.com>
(cherry picked from commit 794ea5e828010e8b68493b2fc6d2963263195a02)
Reviewed-on: https://go-review.googlesource.com/c/go/+/399820
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Reviewed-by: Cherry Mui <cherryyz@google.com>
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2022-04-12 15:19:32 +00:00
Lynn Boger
9ccf5b8e86 runtime: improve memmove for ppc64x
This improves performance of memmove for larger moves by
unrolling the main loop from 32 byte to 64 byte moves.

The improvement of the relevant sizes on a power9:

Memmove/64      5.11ns ± 0%    5.00ns ± 0%   -2.21%
Memmove/128     8.26ns ± 0%    5.88ns ± 0%  -28.83%
Memmove/256     12.7ns ± 0%     8.6ns ± 0%  -31.94%
Memmove/512     17.9ns ± 0%    14.3ns ± 0%  -19.87%
Memmove/1024    33.3ns ± 0%    27.0ns ± 0%  -18.92%
Memmove/2048    72.1ns ± 0%    51.8ns ± 0%  -28.25%
Memmove/4096     126ns ± 0%     110ns ± 0%  -12.63%


Change-Id: I74162a9f152d7752a8281da1b89a66da99a3fdc9
Reviewed-on: https://go-review.googlesource.com/c/go/+/399499
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2022-04-12 13:54:06 +00:00
Wayne Zuo
d6320f1a58 cmd/compile: add SARX instruction for GOAMD64>=3
name                    old time/op  new time/op  delta
ShiftArithmeticRight-8  0.68ns ± 5%  0.30ns ± 6%  -56.14%  (p=0.000 n=10+10)

Change-Id: I052a0d7b9e6526d526276444e588b0cc288beff4
Reviewed-on: https://go-review.googlesource.com/c/go/+/399055
Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2022-04-12 12:59:27 +00:00
Matthew Dempsky
2b31abc528 test: add //go:build support to run.go
gofmt is rewriting +build comments into //go:build anyway, so update
the test script to support both.

Change-Id: Ia6d950cfaa2fca9f184b8b2d3625a551bff88dde
Reviewed-on: https://go-review.googlesource.com/c/go/+/399794
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2022-04-12 05:46:57 +00:00
Bryan C. Mills
f2d9ab263b cmd/go: set GOROOT explicitly for 'go generate' subprocesses
Code generators may reasonably expect to find the GOROOT for which the
code is being generated.

If the generator invokes 'go run' (which ought to be reasonable to do)
and the user has set 'GOFLAGS=trimpath' (which also ought to be
reasonable), then either 'go generate' or 'go run' needs to set GOROOT
explicitly.

I would argue that it is more appropriate for 'go generate' to set
GOROOT than for 'go run' to do so, since a user may reasonably invoke
'go run' to reproduce a user-reported bug in a standalone Go program,
but should not invoke 'go generate' except to regenerate code for a Go
package.

Updates #51461.

Change-Id: Iceba233b4eebd57c40cf5dcd4af9031d210dc9d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/399157
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
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2022-04-12 03:13:39 +00:00
Bryan C. Mills
e299381cd1 cmd/go: fix TestScript/build_trimpath_goroot when built with a mismatched GOROOT_FINAL
Fixes #52236.
Updates #51461.

Change-Id: Ie91e0256afd45e9bbd60fd8cdc696363027ab696
Reviewed-on: https://go-review.googlesource.com/c/go/+/399156
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
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2022-04-12 03:13:28 +00:00
Bryan Mills
d4dbad53ca Revert "cmd/compile/internal: fix test error on loong64"
This reverts CL 367043.

Reason for revert: auto-submitted prematurely, breaking tests on most builders.

Change-Id: I6da319fb042b629bcd6f549be638497a357e7d28
Reviewed-on: https://go-review.googlesource.com/c/go/+/399795
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2022-04-12 03:07:42 +00:00
Xiaodong Liu
ace7672526 cmd/compile/internal: fix test error on loong64
For TestLogOpt test case, add loong64 support to test the host
architecture and os.

The Ctz64 is not intrinsified on loong64 for TestIntendedInlining.

Contributors to the loong64 port are:
  Weining Lu <luweining@loongson.cn>
  Lei Wang <wanglei@loongson.cn>
  Lingqin Gong <gonglingqin@loongson.cn>
  Xiaolin Zhao <zhaoxiaolin@loongson.cn>
  Meidan Li <limeidan@loongson.cn>
  Xiaojuan Zhai <zhaixiaojuan@loongson.cn>
  Qiyuan Pu <puqiyuan@loongson.cn>
  Guoqi Chen <chenguoqi@loongson.cn>

This port has been updated to Go 1.15.6:
  https://github.com/loongson/go

Updates #46229

Change-Id: I4ca290bf725425a9a6ac2c6767a5bf4ff2339d0e
Reviewed-on: https://go-review.googlesource.com/c/go/+/367043
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
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Reviewed-by: Russ Cox <rsc@golang.org>
Auto-Submit: Russ Cox <rsc@golang.org>
2022-04-12 02:20:36 +00:00
champly
ca7c6ef33d runtime/chan.go: improve closed channel receive performance
Use this benchmark ut:

```go
func BenchmarkReceiveDataFromClosedChan(b *testing.B) {
	count := b.N
	ch := make(chan struct{}, count)
	for i := 0; i < count; i++ {
		ch <- struct{}{}
	}

	b.ResetTimer()
	for range ch {
	}
}
```

Benchmark 10 times(`go test -bench=.`), and then use `benchstat` got the result:

```shell
name                         old time/op  new time/op  delta
ReceiveDataFromClosedChan-5  12.0ns ± 1%  11.4ns ± 0%  -5.54%  (p=0.000 n=10+8)
```

Fixes:  #52067

Change-Id: I8db398cc8c04a46cb66ffb6768ab72a87903812f
GitHub-Last-Rev: 1e0142416f
GitHub-Pull-Request: golang/go#52068
Reviewed-on: https://go-review.googlesource.com/c/go/+/396884
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Keith Randall <khr@google.com>
Auto-Submit: Keith Randall <khr@google.com>
2022-04-12 02:18:23 +00:00
Ian Lance Taylor
a362d54614 os: mark Solaris nam/door/port files as irregular
No test because I'm too lazy to figure out how to create such files.

Fixes #52259

Change-Id: I7a07f49993cf046888729e9206ed53dddcf9cb13
Reviewed-on: https://go-review.googlesource.com/c/go/+/399435
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Russ Cox <rsc@golang.org>
2022-04-12 01:41:47 +00:00
hopehook
370cadd0e4 cmd/compile: add a test case and some comments for deadlock on syntax error
After CL 398014 fixed a compiler deadlock on syntax errors,
this CL adds a test case and more details for that.

How it was fixed:

CL 57751 introduced a channel "sem" to limit the number of
simultaneously open files.

Unfortunately, when the number of syntax processing goroutines
exceeds this limit, will easily trigger deadlock.

In the original implementation, "sem" only limited the number
of open files, not the number of concurrent goroutines, which
will cause extra goroutines to block on "sem". When the p.err
of the following iteration happens to be held by the blocking
goroutine, it will fall into a circular wait, which is a deadlock.

CL 398014 fixed the above deadlock, also see issue #52127.

First, move "sem <- struct{}{}" to the outside of the syntax
processing goroutine, so that the number of concurrent goroutines
does not exceed the number of open files, to ensure that all
goroutines in execution can eventually write to p.err.

Second, move the entire syntax processing logic into a separate
goroutine to avoid blocking on the producer side.

Change-Id: I1bb89bfee3d2703784f0c0d4ded82baab2ae867a
Reviewed-on: https://go-review.googlesource.com/c/go/+/399054
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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2022-04-12 01:18:27 +00:00
nimelehin
be0262a127 cmd/compile: fix compilation crash with several blank labels
Fixes #52278

Change-Id: Ibf67c7b019feec277d316e04d93b458efea133fb
Reviewed-on: https://go-review.googlesource.com/c/go/+/399574
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
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2022-04-12 00:32:31 +00:00
zhouguangyuan
ec5e5dba6f runtime: fix name of type parameter
CL 372774 is for reflect, this CL is for _type in runtime.
Add a test case to ensure the name method of _type can be exercised.

Updates #50208

Change-Id: I26ccf8c5c574dd9e78510cf29eb40ae7c8d449ab
Reviewed-on: https://go-review.googlesource.com/c/go/+/393917
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Keith Randall <khr@google.com>
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2022-04-12 00:32:29 +00:00
Maxime Soulé
ff14e844d2 net/http/httptest: allow multiple fields be present in one Trailer field
Fixes #51761

Change-Id: Ibaa17076ba51b666e25333e78180b8c7c4c940ec
Reviewed-on: https://go-review.googlesource.com/c/go/+/393616
Reviewed-by: Damien Neil <dneil@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
2022-04-11 23:17:38 +00:00
Keith Randall
ea7e3e3c0f runtime: align m.procid to 8 bytes on 32-bit systems
https://go-review.googlesource.com/c/go/+/383434 started using
atomic Load64 on this field, which breaks 32 bit platforms which
require 64-bit alignment of uint64s that are passed to atomic operations.

Not sure why this doesn't break everywhere, but I saw it break on
my laptop during all.bash.

Change-Id: Ida27b23068b3cc7208fce3c97b69a464ccf68209
Reviewed-on: https://go-review.googlesource.com/c/go/+/399754
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Michael Pratt <mpratt@google.com>
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Reviewed-by: Keith Randall <khr@google.com>
2022-04-11 22:49:56 +00:00
yangwenmai
11c450fa58 A+C: add Wen Yang (individual CLA)
Change-Id: Iaac18d78b4a11698d0b5f70b1d5143c0da8a6943
Reviewed-on: https://go-review.googlesource.com/c/go/+/399299
Reviewed-by: mzh <mzh@golangcn.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2022-04-11 22:24:03 +00:00
Russ Cox
0605bf6052 go/ast, go/printer: recognize export and extern line directives
Now that gofmt is reformatting these, we can't get away with
not knowing about directives such as //export and //extern (for gccgo).
Otherwise "//export foo" and "//extern foo" turn into "// export foo",
and "// extern foo", which are completely different meanings.

For #51082.

Change-Id: Id0970331fa0b52ab5fa621631b5fa460767068bb
Reviewed-on: https://go-review.googlesource.com/c/go/+/399734
Run-TryBot: Russ Cox <rsc@golang.org>
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2022-04-11 22:03:44 +00:00
Russ Cox
19309779ac all: gofmt main repo
[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]

Run the updated gofmt, which reformats doc comments,
on the main repository. Vendored files are excluded.

For #51082.

Change-Id: I7332f099b60f716295fb34719c98c04eb1a85407
Reviewed-on: https://go-review.googlesource.com/c/go/+/384268
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2022-04-11 16:34:30 +00:00
Russ Cox
017933163a cmd/doc: use new go/doc APIs
[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]

Use the new per-Package go/doc API instead of the
top-level functions from go/doc. These handle links better.

For #51082.

Change-Id: I169b46d973673abdb6f126352c9f1e30f9fe1122
Reviewed-on: https://go-review.googlesource.com/c/go/+/384266
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
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2022-04-11 16:31:53 +00:00
Russ Cox
27b7b1fa19 go/doc: use go/doc/comment
[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]

Use go/doc/comment to implement the existing go/doc comment APIs,
as well as adding new APIs more tailored to the new world.

For #51082.

Change-Id: I05b97ecedbf7cf7b8dede7ace6736ed6d89204a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/384265
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
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2022-04-11 16:31:52 +00:00
Russ Cox
8b4ded3ef3 cmd/go: gofmt alldocs.go
[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]

Reformat alldocs.go using the new doc comment formatter.

This file is so large it gets its own gofmt CL.

For #51082.

Change-Id: Ie14cf1aad776e6f4180d88245d05a86e5fb6a3b0
Reviewed-on: https://go-review.googlesource.com/c/go/+/384267
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
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2022-04-11 16:31:51 +00:00
Russ Cox
078cc6a04f go/printer: format doc comments
[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]

Use go/doc/comment to reformat doc comments into a
standard form, enabling future expansion later and generally
making it easier to edit and read doc comments.

For #51082.

Change-Id: I6ab3b80846f03d781951111e4c36f86f47d21bb2
Reviewed-on: https://go-review.googlesource.com/c/go/+/384264
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2022-04-11 16:31:50 +00:00
Russ Cox
e1b0862925 go/doc/comment: parse and print lists
[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]

Implement lists, like:

	Three numbers:

	  - One
	  - Two
	  - Three

For #51082.

Change-Id: Id87d9c19bca677be968f3803809a9ea6c705f3ad
Reviewed-on: https://go-review.googlesource.com/c/go/+/397286
Run-TryBot: Russ Cox <rsc@golang.org>
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Reviewed-by: Jonathan Amsterdam <jba@google.com>
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2022-04-11 16:31:48 +00:00
Russ Cox
3f5d099663 go/doc/comment: parse and print code
[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]

Implement indented code blocks.

For #51082.

Change-Id: I0eacbf56e101424a875386cb6f26174b239561f5
Reviewed-on: https://go-review.googlesource.com/c/go/+/397285
Run-TryBot: Russ Cox <rsc@golang.org>
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2022-04-11 16:31:47 +00:00
Russ Cox
6eceabf119 go/doc/comment: parse and print headings
[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]

Implement both old-style and new-style headings, like:

	Text here.

	Old Style Heading

	More text here.

	# New Style Heading

	More text here.

For #51082.

Change-Id: I0d735782d0d345794fc2d4e1bdaa0251b8d4bba2
Reviewed-on: https://go-review.googlesource.com/c/go/+/397284
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2022-04-11 16:31:46 +00:00
Russ Cox
e4e033a74c go/doc/comment: add text wrapping
[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]

Implement wrapping of text output, for the “go doc” command.
The algorithm is from D. S. Hirschberg and L. L. Larmore,
“The least weight subsequence problem,” FOCS 1985, pp. 137-143.

For #51082.

Change-Id: I07787be3b4f1716b8ed9de9959f94ecbc596cc43
Reviewed-on: https://go-review.googlesource.com/c/go/+/397283
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
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2022-04-11 16:31:45 +00:00