weak: test the use of runtime.AddCleanup

This change adds a test case for runtime.AddCleanup.

Updates #70907

Change-Id: I29cba9dc5b40cec8e610215974e61ee47e10d00f
Reviewed-on: https://go-review.googlesource.com/c/go/+/649459
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cmd/compile, runtime: use PC of deferreturn for panic transfer

this removes the old conditional-on-register-value
handshake from the deferproc/deferprocstack logic.

The "line" for the recovery-exit frame itself (not the defers
that it runs) is the closing brace of the function.

Reduces code size slightly (e.g. go command is 0.2% smaller)

Sample output showing effect of this change, also what sort of
code it requires to observe the effect:
```
package main

import "os"

func main() {
g(len(os.Args) - 1)           // stack[0]
}

var gi int
var pi *int = &gi

//go:noinline
func g(i int) {
switch i {
case 0:
defer func() {
println("g0", i)
q()                  // stack[2] if i == 0
}()
for j := *pi; j < 1; j++ {
defer func() {
println("recover0", recover().(string))
}()
}
default:
for j := *pi; j < 1; j++ {
defer func() {
println("g1", i)
q()              // stack[2] if i == 1
}()
}
defer func() {
println("recover1", recover().(string))
}()
}
p()
}                                // stack[1] (deferreturn)

//go:noinline
func p() {
panic("p()")
}

//go:noinline
func q() {
panic("q()")                 // stack[3]
}

/* Sample output for "./foo foo":
recover1 p()
g1 1
panic: q()

goroutine 1 [running]:
main.q()
.../main.go:46 +0x2c
main.g.func3()
.../main.go:29 +0x48
main.g(0x1?)
.../main.go:37 +0x68
main.main()
.../main.go:6 +0x28
*/
```

Change-Id: Ie39ea62ecc244213500380ea06d44024cadc2317
Reviewed-on: https://go-review.googlesource.com/c/go/+/650795
Reviewed-by: Cherry Mui <cherryyz@google.com>
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go/types, types2: remove coreType call in lookup

For #70128.

Change-Id: I7d16ad7fdc6b07a2632b4eaefaedfa2bcceffe1d
Reviewed-on: https://go-review.googlesource.com/c/go/+/652215
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internal/abi: use arch family instead of arch string

No point in using string comparison when we can use integer comparison instead.

Unify the constants in cmd/internal/sys and internal/goarch while
we are at it.

Change-Id: I5681a601030307b7b286f958a8965559cb43506d
Reviewed-on: https://go-review.googlesource.com/c/go/+/652175
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go/types, types2: remove another coreType call in type checking range clause

For #70128.

Change-Id: I5949bccbfaaebc435ae8ac7c70580d9740de6f00
Reviewed-on: https://go-review.googlesource.com/c/go/+/652136
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go/types, types2: better error messages for calls

Provide the exact error cause instead of reporting a missing
core type.

For #70128.

Change-Id: I34bd401115742883cb6aef7997477473b2464abb
Reviewed-on: https://go-review.googlesource.com/c/go/+/651256
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
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go/types, types2: better error messages for for-range clauses

Provide the exact error cause instead of reporting a missing
core type.

For #70128.

Change-Id: I835698fa1f22382711bd54b974d2c87ee17e9065
Reviewed-on: https://go-review.googlesource.com/c/go/+/651215
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
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strconv: use builtin min function in commonPrefixLenIgnoreCase

To make code a bit simpler.

Change-Id: I33b3e04bc810a4838584c477854ef612b355579a
GitHub-Last-Rev: 6d5bbc2a2877193e1319b9e626f408eda399666e
GitHub-Pull-Request: golang/go#71927
Reviewed-on: https://go-review.googlesource.com/c/go/+/651975
Reviewed-by: Ian Lance Taylor <iant@google.com>
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net: accept a valid IP address in LookupMX

Fixes #56025

Change-Id: I202fdd0e11afeb22c5bc22d91fe4bfea8987e727
Reviewed-on: https://go-review.googlesource.com/c/go/+/651056
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
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all: use testenv.Executable instead of os.Executable and os.Args[0]

In test files, using testenv.Executable is more reliable than
os.Executable or os.Args[0].

Change-Id: I88e577efeabc20d02ada27bf706ae4523129128e
Reviewed-on: https://go-review.googlesource.com/c/go/+/651955
Reviewed-by: Cherry Mui <cherryyz@google.com>
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net/http: remove unused err parameter from cancel

Change-Id: I91f1b93298671bcb2aa5f86a59f5794bd3e3b2a9
GitHub-Last-Rev: f2e7ffb45f7b201381e1f1a3018b523dea4249f8
GitHub-Pull-Request: golang/go#71911
Reviewed-on: https://go-review.googlesource.com/c/go/+/651220
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net: add godoc links for UnixConn, UnixListener

Change-Id: I8f332eb14c0ce4f31a2e0f44ddd227769d7b940f
Reviewed-on: https://go-review.googlesource.com/c/go/+/651875
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syscall: allow \x00-prefixed unix abstract socket to use full path length

Fixes #70893

Change-Id: Ia0aaa497dad335fe962d52d3f115d26e8046e36f
GitHub-Last-Rev: 7dd663678d8aecdfac94541a570dfbd1aa2577e7
GitHub-Pull-Request: golang/go#71851
Reviewed-on: https://go-review.googlesource.com/c/go/+/650875
Reviewed-by: Ian Lance Taylor <iant@google.com>
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unique: use runtime.AddCleanup instead of runtime.SetFinalizer

Replace the usage of runtime.SetFinalizer with runtime.AddCleanup in
tests.

Updates #70907

Change-Id: I0d91b6af9643bde278215318f6176277373ddd19
Reviewed-on: https://go-review.googlesource.com/c/go/+/649458
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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cmd/compile/internal/ssa: correct MOVDnop handling for arm64

The extension-removing rules for ARM64 were moved to late lower in
CL 568616. This means that the late lower pass can now generate
MOVDreg, however the rules that potentially eliminate MOVDreg only
exist in the earlier pass. Fix this by duplicating the MOVDreg/NOVDnop
rules in late lower, such that we can potentially eliminate conversions.

Removes 400+ instructions from the Go binary on openbsd/arm64.

Change-Id: I14aad06b994c9179f3ecdda566629793ba167511
Reviewed-on: https://go-review.googlesource.com/c/go/+/651819
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cmd/compile: remove carriage returns from AMD64latelower.rules

AMD64latelower.rules currently has Windows style line endings,
rather than Unix style line endings. Correct this.

Change-Id: Ie068dc6c64bd51cf2aa5bd192839fca4f28f40b8
Reviewed-on: https://go-review.googlesource.com/c/go/+/651818
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syscall: use sync.OnceFunc for copyenv

Change-Id: I64f658c1962878685ba7736f19d58e10fbdcb94a
Reviewed-on: https://go-review.googlesource.com/c/go/+/651835
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runtime: exclude allocation(s) from memmove/memclr benchmarking

The overhead for allocation is not significant but it should be excluded
from the memmove/memclr benchmarking anyway.

Change-Id: I7ea86d1b85b13352ccbff16f7510caa250654dab
Reviewed-on: https://go-review.googlesource.com/c/go/+/645576
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cmd: initial compiler+linker support for DWARF5 .debug_addr

This patch rolls the main .debug_info DWARF section from version 4 to
version 5, and also introduces machinery in the Go compiler and linker
for taking advantage of the DWARF5 ".debug_addr" section for
subprogram DIE "high" and "low" PC attributes. All functionality is
gated by GOEXPERIMENT=dwarf5.

For the compiler portion of this patch, we add a new DIE attribute
form "DW_FORM_addrx", which accepts as an argument a function (text)
symbol.  The dwarf "putattr" function is enhanced to handle this
format by invoking a new dwarf context method "AddIndirectTextRef".
Under the hood, this method invokes the Lsym method WriteDwTxtAddrx,
which emits a new objabi.R_DWTXTADDR_* relocation. The size of the
relocation is dependent on the number of functions in the package; we
pick a size that is just big enough for the largest func index.

In the linker portion of this patch, we now switch over to writing out
a version number of 5 (instead of 4) in the compile unit header (this
is required if we want to use addrx attributes). In the parallel portion
of DWARF gen, within each compilation unit we scan subprogram DIEs to
look for R_DWTXTADDR_* relocations, and when we find such a reloc,
we assign a slot in the .debug_addr section for the func targeted.
After the parallel portion is complete, we then walk through all of the
compilation units to assign a value to their DW_AT_addr_base attribute,
which points to the portion of the single .debug_addr section containing
the text addrs for that compilation unit.

Note that once this patch is in, programs built with GOEXPERIMENT=dwarf5
will have broken/damaged DWARF info; in particular, since we've changed
only the CU and subprogram DIEs and haven't incorported the other
changes mandated by DWARF5 (ex: .debug_ranges => .debug_rnglists)
a lot of the variable location info will be missing/incorrect. This
will obviously change in subsequent patches.

Note also that R_DWTXTADDR_* can't be used effectively for lexical
scope DIE hi/lo PC attrs, since there isn't a viable way to encode
"addrx + constant" in the attribute value (you would need a new entry
for each attr endpoint in .debug_addr, which would defeat the point).

Updates #26379.

Change-Id: I2dfc45c9a8333e7b2a58f8e3b88fc8701fefd006
Reviewed-on: https://go-review.googlesource.com/c/go/+/635337
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cmd/internal/objabi,cmd/link/internal/sym: add SDWARFADDR symbol type

Add a new symbol type: SDWARFADDR. This kind of symbol stores content
to be added to the DWARF .debug_addr section (new with DWARF5). At the
moment these symbols are created only in the linker, but it's not hard to
imagine other implementations in which the compiler would create them,
so they are added to both the compiler and linker symbol kind space.

Updates #26379.

Change-Id: I4a82ead0d59fe6028abfd6d6e3fc3df2e28c0ef6
Reviewed-on: https://go-review.googlesource.com/c/go/+/634415
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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cmd/internal/objabi: add new R_DWTXTADDR_* relocation types

Add a set of new relocations to be used when the compiler is writing
debug information using DWARF version 5. No changes in compiler or
linker functionality, this patch just adds the relocations themselves
and some helper functions; uses will appear in a later patch. These
relocations are generated by the compiler when writing a DWARF DIE
attribute of form DW_FORM_addrx, or when writing a .debug_addr index
reference in a SDWARFRANGE or SDWARFLOC section. The target symbol of
the relocation is a function (STEXT symbol); the linker resolves the
relocation by replacing the target of the reloc with an index of a
slot in the .debug_addr section (.debug_addr is new with DWARF5).

Updates #26379.

Change-Id: I43c587d25d0836972dac487d09c8924d77345f4e
Reviewed-on: https://go-review.googlesource.com/c/go/+/633880
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cmd/link, cmd/internal/dwarf: add DWARF5 line table support

This patch rolls out the necessary changes to migrate the DWARF line
table support in the compiler and linker to DWARF version 5, gated by
the "dwarf5" GOEXPERIMENT.

DWARF version 5 includes a number of changes to the line table,
notably a revamped prolog section and a change in the indexing system
used to refer to files and directories within the line table
program. Specifically, prior to DWARF 4 a compilation's directory
table was considered to have an implicit zero entry containing the
compilation directory of the translation unit (package), and the file
table was considered to have an implicit zero entry storing the
"primary source file" (stored in the compilation unit DIE name).
DWARF 5 does away with these implicity entries meaning that files and
dirs are now effectively a 0-based index.

Updates #26379.

Change-Id: I9b4f1be5415aacec1ba57366d60bd48819c56ea5
Reviewed-on: https://go-review.googlesource.com/c/go/+/633879
Reviewed-by: Alessandro Arzilli <alessandro.arzilli@gmail.com>
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cmd/internal/dwarf: add DW_LNCT and DW_UT constant definitions

Add a set of constants for the DWARF version 5 line table content
description values found in the V5 line table prolog, and for the
new DWARF unit type encodings.

Updates #26379.

Change-Id: I8f4989ea6b6cbb303deda1a6a20ad243d73b46b1
Reviewed-on: https://go-review.googlesource.com/c/go/+/633878
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internal/goexperiment: add a new experiment to gate DWARF version 5

Add new experiment to enable generation of DWARF version 5 in
the compiler and linker.

Updates #26379.

Change-Id: I5e686a5e66d13b01e8cc8cd7c04f6fffd90d597b
Reviewed-on: https://go-review.googlesource.com/c/go/+/633877
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cmd/link, cmd/internal/objabi: remove R_DWARFFILEREF relocation type

Get rid of the R_DWARFFILEREF relocation type -- we have not used this
relocation for a while now, ever since jfaller's revamp of the DWARF
line table file section in Go 1.15. No change in compiler or linker
functionality; this is purely a dead code cleanup.

Change-Id: I178760c87f3aa79694cfabe7364ca382605c6975
Reviewed-on: https://go-review.googlesource.com/c/go/+/633876
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cmd/go: look at runes, not bytes, when printing env vars

For #58508
Fixes #71863

Change-Id: Ib1ebaf751bcc6900da6ffd01a9462dd237e2c89a
Reviewed-on: https://go-review.googlesource.com/c/go/+/651295
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internal/runtime/atomic: add Xchg8 for mipsx

For #69735

Change-Id: I2a0336214786e14b9a37834d81a0a0d14231451c
Reviewed-on: https://go-review.googlesource.com/c/go/+/651315
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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internal/bytealg: add assembly implementation of Count/CountString for mips64x

Add a simple assembly implementation of Count/CountString for mips64x.

name            old sec/op    new sec/op     vs base
CountSingle/10-4   31.16n ±  0%    41.69n ±  0%  +33.79% (p=0.000 n=11)
CountSingle/32-4   69.58n ±  0%    59.61n ±  0%  -14.33% (p=0.000 n=11)
CountSingle/4K-4   7.428µ ±  0%    5.153µ ±  0%  -30.63% (p=0.000 n=11)
CountSingle/4M-4   7.634m ±  0%    5.300m ±  0%  -30.58% (p=0.000 n=11)
CountSingle/64M-4   134.4m ±  0%    100.8m ±  3%  -24.99% (p=0.000 n=11)

name             old B/s      new B/s       vs base
CountSingle/10-4   306.1Mi ±  0%    228.8Mi ±  0%  -25.25% (p=0.000 n=11)
CountSingle/32-4   438.6Mi ±  0%    512.0Mi ±  0%  +16.74% (p=0.000 n=11)
CountSingle/4K-4   525.9Mi ±  0%    758.0Mi ±  0%  +44.15% (p=0.000 n=11)
CountSingle/4M-4   523.9Mi ±  0%    754.7Mi ±  0%  +44.05% (p=0.000 n=11)
CountSingle/64M-4  476.3Mi ±  0%    635.0Mi ±  0%  +33.31% (p=0.000 n=11)

Change-Id: Id5ddbea0d080e2903156ef8dc86c030a8179115b
Reviewed-on: https://go-review.googlesource.com/c/go/+/650995
Reviewed-by: Keith Randall <khr@google.com>
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Auto-Submit: Keith Randall <khr@golang.org>

crypto/rand: add example for Int

Change-Id: I401e6092b1cbbd332406ffa7f923c46de0a3ff49
GitHub-Last-Rev: ef2057888465be3cff7fb60bc6ffe3d7573ec348
GitHub-Pull-Request: golang/go#71773
Reviewed-on: https://go-review.googlesource.com/c/go/+/650035
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
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crypto/internal/fips140/nistec: make SetBytes constant time

Similarly to CL 648035, SetBytes doesn't need to be constant time for
the uses we make of it in the standard library (ECDH and ECDSA public
keys), but it doesn't cost much to make it constant time for users of
the re-exported package, or even just to save the next person from
convincing themselves that it's ok for it not to be constant time.

Change-Id: I6a6a465622a0de08d9fc71db75c63185a82aa54a
Reviewed-on: https://go-review.googlesource.com/c/go/+/650579
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Auto-Submit: Filippo Valsorda <filippo@golang.org>
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Reviewed-by: Roland Shoemaker <roland@golang.org>

reflect: correctly handle method values in Seq

Currently method values aren't correctly handled in Seq because we call
canRangeFunc on the reciever type, not the method value type, when we're
handling a method value. reflect.Value.Type has the logic to obtain the
method value type from the Value.

This change slightly refactors reflect.Value.Type into a separate
function so we can obtain the correct type as an abi.Type and pass it
off to canRangeFunc (and canRangeFunc2).

Fixes #71874.

Change-Id: Ie62dfca2a84b8f2f816bb87ff1ed1a58a7bb8122
Reviewed-on: https://go-review.googlesource.com/c/go/+/651416
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runtime: use WCLONE when waiting on pidfd test child

As of CL 650835, the pidfd test child no longer sends SIGCHLD on exit.
Per clone(2), "If [the child termination] signal is specified as
anything other than SIGCHLD, then the parent process must specify the
__WALL or __WCLONE options when waiting for the child with wait(2)."

Align with this requirement.

For #71828.

Change-Id: I6a6a636c739e4a59abe1533fe429a433e8588939
Reviewed-on: https://go-review.googlesource.com/c/go/+/651415
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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os: don't log the entire environment in tests

TestEnvironConsistency logs the values of all the environment variables,
which can be quite large on some environments. This change limits the
output to just the variables that caused the test to fail.

Change-Id: Ie796b57ac2cc845093c73298058b720df344fa28
Reviewed-on: https://go-review.googlesource.com/c/go/+/650581
Reviewed-by: Ian Lance Taylor <iant@google.com>
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doc: add a disclamer for the TLS handshake timeouts TL;DR bug in godebug.md

Relates to #71257. Since post-quantum TLS algorithms are enabled by default, we should warn about the possible bugs with legacy servers (see https://tldr.fail/)

Change-Id: I06a5d8a927497ea2141007b14a90af27e0891720
GitHub-Last-Rev: 476e6462dfc7db8c2a47a25dcb7eb342264aabad
GitHub-Pull-Request: golang/go#71865
Reviewed-on: https://go-review.googlesource.com/c/go/+/651036
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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debug/buildinfo: base64-encode test binaries

Overzealous security scanners don't like the Go 1.17 binary because they
think it has every 1.17 security vulnerability. base64-encode the binary
to hide from them.

I've also extended the instructions to make the binary easier to
reproduce.

Since we do the Go binary, we might as well do the C binary too, as it
apparently makes some virus scanners unhappy.

Fixes #71753.
For #71734.
For #71821.

Change-Id: I6a6a636cccbf5312522f52f27f74eded64048fb7
Reviewed-on: https://go-review.googlesource.com/c/go/+/651175
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Auto-Submit: Michael Pratt <mpratt@google.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>

cmd/compile: remove residual register GC map code

We used to generate register GC maps as an experimental approach
for asynchronous preemption, which later we chose not to take.
Most of the register GC map code are already removed. One
exception is that the ssa.Register type still contains a field
for the register map index. Remove it.

Change-Id: Ib177ebce9548aa5ffbcaedd4b507240ea7df8afe
Reviewed-on: https://go-review.googlesource.com/c/go/+/651076
Reviewed-by: David Chase <drchase@google.com>
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internal/runtime/atomic: add Xchg8 for mips64x

For #69735

Change-Id: Ide6b3077768a96b76078e5d4f6460596b8ff1560
Reviewed-on: https://go-review.googlesource.com/c/go/+/631756
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Keith Randall <khr@google.com>
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cmd/compile: don't report newLimit discovered when unsat happens multiple times

Fixes #71852

Change-Id: I696fcb8fc8c0c2e5e5ae6ab50596f6bdb9b7d498
Reviewed-on: https://go-review.googlesource.com/c/go/+/650975
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Reviewed-by: Keith Randall <khr@golang.org>

syscall: don't send child signal when testing pidfd

Avoid a spurious SIGCHLD the first time we start a process.

Fixes #71828

Change-Id: I744100d21bf6aaaaafc99bc5eec9f9f807a50682
Reviewed-on: https://go-review.googlesource.com/c/go/+/650835
Auto-Submit: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Michael Pratt <mpratt@google.com>
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context: replace newAfterFuncContext with a global declaration using blank identifier

newAfterFuncContext has never been used, the only reason I can imagine
for its existence is to guarantee that the implementation is correct.

It is a small cleanup and make code more idiomatic.

Change-Id: I61ee213a9284f3c3bda7f91196f3a1604babd0f6
GitHub-Last-Rev: c08bd69ef3f0dbc2f573f54095fea35dad2b1145
GitHub-Pull-Request: golang/go#71856
Reviewed-on: https://go-review.googlesource.com/c/go/+/651015
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cmd/internal/obj/loong64: optimize immediate loading

                      |        old       |      new                           |
                      |      sec/op      |    sec/op             vs base      |
BinaryTree17               11.08 ± 2%        11.16 ± 1%        ~ (p=0.529 n=10)
Fannkuch11                 2.716 ± 0%        2.737 ± 0%   +0.79% (p=0.000 n=10)
FmtFprintfEmpty           67.37n ± 0%       66.42n ± 0%   -1.41% (p=0.000 n=10)
FmtFprintfString          95.28n ± 0%       90.85n ± 0%   -4.64% (p=0.000 n=10)
FmtFprintfInt             97.69n ± 0%       98.06n ± 0%   +0.38% (p=0.000 n=10)
FmtFprintfIntInt          149.1n ± 0%       147.4n ± 0%   -1.14% (p=0.000 n=10)
FmtFprintfPrefixedInt     223.6n ± 0%       196.5n ± 0%  -12.10% (p=0.000 n=10)
FmtFprintfFloat           290.9n ± 0%       281.6n ± 1%   -3.21% (p=0.000 n=10)
FmtManyArgs               670.6n ± 0%       642.6n ± 0%   -4.18% (p=0.000 n=10)
GobDecode                 10.26m ± 1%       10.23m ± 1%        ~ (p=0.105 n=10)
GobEncode                 12.09m ± 1%       11.94m ± 1%   -1.24% (p=0.000 n=10)
Gzip                      316.9m ± 0%       315.9m ± 0%   -0.32% (p=0.001 n=10)
Gunzip                    65.48m ± 0%       59.77m ± 0%   -8.72% (p=0.000 n=10)
HTTPClientServer          70.36µ ± 0%       68.72µ ± 0%   -2.34% (p=0.000 n=10)
JSONEncode                13.61m ± 1%       13.19m ± 1%   -3.13% (p=0.000 n=10)
JSONDecode                57.52m ± 1%       54.15m ± 1%   -5.86% (p=0.000 n=10)
Mandelbrot200             4.577m ± 0%       4.572m ± 0%   -0.10% (p=0.002 n=10)
GoParse                   6.466m ± 0%       6.363m ± 0%   -1.58% (p=0.000 n=10)
RegexpMatchEasy0_32       89.20n ± 0%       87.72n ± 0%   -1.65% (p=0.000 n=10)
RegexpMatchEasy0_1K       748.6n ± 0%       907.6n ± 0%  +21.22% (p=0.000 n=10)
RegexpMatchEasy1_32       94.14n ± 0%       93.81n ± 0%   -0.35% (p=0.000 n=10)
RegexpMatchEasy1_1K       832.1n ± 0%       953.6n ± 0%  +14.59% (p=0.000 n=10)
RegexpMatchMedium_32      982.7n ± 0%      1018.0n ± 0%   +3.59% (p=0.000 n=10)
RegexpMatchMedium_1K      30.51µ ± 0%       30.00µ ± 0%   -1.65% (p=0.000 n=10)
RegexpMatchHard_32        1.721µ ± 0%       1.664µ ± 0%   -3.34% (p=0.000 n=10)
RegexpMatchHard_1K        50.76µ ± 0%       50.92µ ± 0%   +0.32% (p=0.000 n=10)
Revcomp                   870.5m ± 0%       710.5m ± 0%  -18.38% (p=0.000 n=10)
Template                  93.18m ± 1%       93.67m ± 1%        ~ (p=0.123 n=10)
TimeParse                 309.2n ± 0%       307.8n ± 0%   -0.45% (p=0.000 n=10)
TimeFormat                401.5n ± 0%       394.2n ± 0%   -1.82% (p=0.000 n=10)
geomean                   72.73µ            71.70µ        -1.41%

Change-Id: Id8d342ef3bb82a420434b2b841674683efef67be
Reviewed-on: https://go-review.googlesource.com/c/go/+/620737
Reviewed-by: Cherry Mui <cherryyz@google.com>
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Reviewed-by: sophie zhao <zhaoxiaolin@loongson.cn>

internal/bytealg: clean up and simplify the riscv64 equal implementation

Now that riscv64 is only regabi, remove the entrypoint separation and
have runtime.memequal_varlen call runtime.memequal. Add a zero byte
length check and replace the equal and not equal exit paths with a
single exit path that conditions on length reaching zero.

Cq-Include-Trybots: luci.golang.try:gotip-linux-riscv64
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cmd/internal/obj/x86: add support for the endbr64 instruction on amd64

Add support for endbr64, which terminates an indirect branch in 64-bit
mode. This is effectively used to mark locations where an indirect branch
is permitted to land, when Indirect Branch Tracking (IBT) is enforced on
Intel CPUs.

Updates #66054

Change-Id: Ib898031711cfaaa6e05c197bfe727ded0bce6f52
Reviewed-on: https://go-review.googlesource.com/c/go/+/649215
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crypto/tls: improve ech parsing errors

Make the errors we return when parsing an ECHConfig slightly more
verbose.

Fixes #71706

Change-Id: Id138fd9defec71ce492a490a71af4981cb9ede51
Reviewed-on: https://go-review.googlesource.com/c/go/+/650720
Auto-Submit: Roland Shoemaker <roland@golang.org>
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crypto/tls: fix incorrect EncryptedClientHelloKey comment

Updates #71706

Change-Id: Id689ec476eb3f76500dbf59d716a4376749de700
Reviewed-on: https://go-review.googlesource.com/c/go/+/650719
Reviewed-by: Daniel McCarney <daniel@binaryparadox.net>
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go/*: use go/types.Func.Signature and go/ast.Preorder

In the few obvious candidates that I found after a bit of grepping.

Change-Id: I36af79c46d29e4422bce1f43bbbac9db7de2001a
Reviewed-on: https://go-review.googlesource.com/c/go/+/650656
Reviewed-by: Alan Donovan <adonovan@google.com>
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all: implement plugin build mode for riscv64

Change-Id: I8d7bbeebbf4a46f2fd8d630b1edbaf79b8ffccc5
Reviewed-on: https://go-review.googlesource.com/c/go/+/420114
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Reviewed-by: Joel Sing <joel@sing.id.au>
TryBot-Bypass: Joel Sing <joel@sing.id.au>

internal/runtime/atomic: add Xchg8 for riscv64

For #69735

Change-Id: I34ca2b027494525ab64f94beee89ca373a5031ae
Reviewed-on: https://go-review.googlesource.com/c/go/+/631615
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Mark Ryan <markdryan@rivosinc.com>
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
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internal/poll: note that copy_file_range bug is fixed

We shouldn't drop the workaround in case we're running on an unpatched
kernel.

For #44272.

Change-Id: I6a6a636cb81c31856ac9b682e7d02fa1d8efa5d9
Reviewed-on: https://go-review.googlesource.com/c/go/+/644878
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runtime: minor mfinal.go code cleanup

This change moves finBlockSize into mfinal.go and renames finblock to
finBlock.

Change-Id: I20a0bc3907e7b028a2caa5d2fe8cf3f76332c871
Reviewed-on: https://go-review.googlesource.com/c/go/+/650695
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weak: accept linker-allocated objects to Make

Currently Make panics when passed a linker-allocated object. This is
inconsistent with both runtime.AddCleanup and runtime.SetFinalizer. Not
panicking in this case is important so that all pointers can be treated
equally by these APIs. Libraries should not have to worry where a
pointer came from to still make weak pointers.

Supporting this behavior is a bit complex for weak pointers versus
finalizers and cleanups. For the latter two, it means a function is
never called, so we can just drop everything on the floor. For weak
pointers, we still need to produce pointers that compare as per the API.
To do this, copy the tiny lock-free trace map implementation and use it
to store weak handles for "immortal" objects. These paths in the
runtime should be rare, so it's OK if it's not incredibly fast, but we
should keep the memory footprint relatively low (at least not have it be
any worse than specials), so this change tweaks the map implementation a
little bit to ensure that's the case.

Fixes #71726.

Change-Id: I0c87c9d90656d81659ac8d70f511773d0093ce27
Reviewed-on: https://go-review.googlesource.com/c/go/+/649460
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
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go/types,types2: remove some unused parameters and results (cleanup)

This CL is the result of pulling the thread of some unused parameter
diagnostics reported by gopls: remove some variables holding partial
type argument expression information that are no longer needed.

Change-Id: Idfc1d0271252ce9bc5b75feb86e30dd2f6dd550b
Reviewed-on: https://go-review.googlesource.com/c/go/+/650775
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cmd/go/internal/cacheprog: drop Request.ObjectID

ObjectID was a misnaming of OutputID from cacheprog's initial
implementation. It was maintained for compatibility with existing
cacheprog users in 1.24 but can be removed in 1.25.

Updates #64876

Change-Id: I8ff53bc581c16b7739e1cfbaa8bd35d285d3231d
Reviewed-on: https://go-review.googlesource.com/c/go/+/649435
Reviewed-by: Sam Thanawalla <samthanawalla@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
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html/template: add available godoc link

Change-Id: I50404dbf0f10ee59007bd0dc5353f38e056a0430
Reviewed-on: https://go-review.googlesource.com/c/go/+/650655
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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cmd/compile/internal/ir: correct doc comment, miniNode in now 12 bytes

Change-Id: I5887565077f598bc7e3edc4b78188956fb13cdaa
GitHub-Last-Rev: 479a04b42e9dc2ffc72cb599ebb12b8fc669fe20
GitHub-Pull-Request: golang/go#71822
Reviewed-on: https://go-review.googlesource.com/c/go/+/650415
Reviewed-by: Keith Randall <khr@google.com>
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cmd/compile: load properly constant values from itabs

While looking at the SSA of following code, i noticed
that these rules do not work properly, and the types
are loaded indirectly through an itab, instead of statically.

type M interface{ M() }
type A interface{ A() }

type Impl struct{}
func (*Impl) M() {}
func (*Impl) A() {}

func main() {
        var a M = &Impl{}
        a.(A).A()
}

Change-Id: Ia275993f81a2e7302102d4ff87ac28586023d13c
GitHub-Last-Rev: 4bfc9019172929d0b0f1c8a1b7eb28cdbc9b87ef
GitHub-Pull-Request: golang/go#71784
Reviewed-on: https://go-review.googlesource.com/c/go/+/649500
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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cmd/compile: determine static values of len and cap in make() calls

This change improves escape analysis by attempting to
deduce static values for the len and cap parameters,
allowing allocations to be made on the stack.

Change-Id: I1161019aed9f60cf2c2fe4d405da94ad415231ac
GitHub-Last-Rev: d78c1b4ca55fa53282e665009f689d0b013f1434
GitHub-Pull-Request: golang/go#71693
Reviewed-on: https://go-review.googlesource.com/c/go/+/649035
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Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>

crypto/internal/fips140/drbg: add Counter warning

The support we provide is tightly scoped, and is not safe for generic
usage elsewhere in the standard library.

Change-Id: Ic38d5c4b416859ab30e2b4a3fc977ba8a2535ae8
Reviewed-on: https://go-review.googlesource.com/c/go/+/647815
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
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go/parser: deprecate parser.ParseDir

Fixes #71122

Change-Id: Icaf27842f4a42e11eea4bd2203eba5d56610c196
Reviewed-on: https://go-review.googlesource.com/c/go/+/649275
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
Commit-Queue: Alan Donovan <adonovan@google.com>
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cmd/go: explicitly reject overlays affecting GOMODCACHE

The go command assumes that GOMODCACHE is immutable. As an example of
one place the assumption is made, the modindex won't stat the files in
GOMODCACHE when getting the cache key for the index entry and just uses
the path of the module in the modcache (basically the module's name and
version). Explicitly reject overlays affecting GOMODCACHE to avoid
surprising and incorrect behavior.

For #71783
For #71075

Change-Id: I21dd5d39d71037de473b09ac8482a1867864e11f
Reviewed-on: https://go-review.googlesource.com/c/go/+/650475
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Reviewed-by: Alan Donovan <adonovan@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>

bytes,strings: remove redundant return statement for Lines

To make it more idiomatic.

Change-Id: If48ae9931908e515df7f23185aac6f84aac72084
GitHub-Last-Rev: 525ed5031a08388f637bd2a09bd47c9e25df21f1
GitHub-Pull-Request: golang/go#71838
Reviewed-on: https://go-review.googlesource.com/c/go/+/650595
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
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Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Commit-Queue: Robert Griesemer <gri@google.com>

path/filepath: use RtlIsDosDeviceName_U to detect Windows devices

RtlIsDosDeviceName_U is specifically designed to detect Windows devices.
We were using GetFullPathName to do this, but it's not the right API
for the job, as it is slower and allocates more memory.

goos: windows
goarch: amd64
pkg: path/filepath
cpu: Intel(R) Core(TM) i7-10850H CPU @ 2.70GHz
           │   old.txt    │               new.txt                │
           │    sec/op    │    sec/op     vs base                │
IsLocal-12   5.685µ ± 59%   1.853µ ± 12%  -67.41% (p=0.000 n=10)

           │   old.txt   │              new.txt               │
           │    B/op     │    B/op     vs base                │
IsLocal-12   496.00 ± 0%   48.00 ± 0%  -90.32% (p=0.000 n=10)

           │   old.txt   │              new.txt               │
           │  allocs/op  │ allocs/op   vs base                │
IsLocal-12   10.000 ± 0%   6.000 ± 0%  -40.00% (p=0.000 n=10)

Change-Id: Ib40ad7a90ab93cf7051c8d6becbce4d287f10f4e
Reviewed-on: https://go-review.googlesource.com/c/go/+/650578
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cmd/compile, runtime: use deferreturn as target PC for recover from deferrangefunc

The existing code for recover from deferrangefunc was broken in
several ways.

1. the code following a deferrangefunc call did not check the return
value for an out-of-band value indicating "return now" (i.e., recover
was called)

2. the returned value was delivered using a bespoke ABI that happened
to match on register-ABI platforms, but not on older stack-based
ABI.

3. the returned value was the wrong width (1 word versus 2) and
type/value(integer 1, not a pointer to anything) for deferrangefunc's
any-typed return value (in practice, the OOB value check could catch
this, but still, it's sketchy).

This -- using the deferreturn lookup method already in place for
open-coded defers -- turned out to be a much-less-ugly way of
obtaining the desired transfer of control for recover().

TODO: we also could do this for regular defer, and delete some code.

Fixes #71675

Change-Id: If7d7ea789ad4320821aab3b443759a7d71647ff0
Reviewed-on: https://go-review.googlesource.com/c/go/+/650476
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syscall: don't truncate newly created files on Windows

There is no need for syscall.OpenFile to truncate newly created files.
Some special Windows files, like the NUL device, can't be
truncated, so we should avoid truncating unless it is really necessary.

Fixes #71752.

Change-Id: I8238048594f706f6a5281053d55cfe3dc898828d
Reviewed-on: https://go-review.googlesource.com/c/go/+/650276
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cmd/compile: add ir.ContainsClosure

And use it to unify all codes that need parent/closure checking.

Change-Id: I0b0aa1b007598668dff2c4bee31e21f0fb3830ce
Reviewed-on: https://go-review.googlesource.com/c/go/+/650315
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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cmd/compile: avoid infinite recursion when inlining closures

CL 630696 changes budget for once-called closures, making them more
inlinable. However, when recursive inlining involve both the closure and
its parent, the inliner goes into an infinite loop:

parent (a closure)  -> closure -> parent -> ...

The problem here dues to the closure name mangling, causing the inlined
checking condition failed, since the closure name affects how the
linker symbol generated.

To fix this, just prevent the closure from inlining its parent into
itself, avoid the infinite inlining loop.

Fixes #71680

Change-Id: Ib27626d70f95e5f1c24a3eb1c8e6c3443b7d90c8
Reviewed-on: https://go-review.googlesource.com/c/go/+/649656
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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cmd/compile/internal/ir: reduce size of miniExpr by 8 bytes

By moving the bit field, we can reduce the miniExpr size by
8 bytes, reducing the sizes of Exprs embedding this type.
Hopefully we get a few types to a lower memory size class.

Change-Id: I4b1d4471cf905f998b26d235980e40ca91446f45
GitHub-Last-Rev: 6dea0bd27c38d9118d13d55052efcb4070b26751
GitHub-Pull-Request: golang/go#71823
Reviewed-on: https://go-review.googlesource.com/c/go/+/650435
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Auto-Submit: Robert Griesemer <gri@google.com>

runtime: add some linknames back for `github.com/bytedance/sonic`

Add some linknames back, therefore sonic (github.com/bytedance/sonic) can work correctly.

Fixes #71672

Change-Id: Iae86c837d8a714855106a26766aa08b128e17e58
GitHub-Last-Rev: 4de0a4871766f9e7763394fdcdcaa9d683e97987
GitHub-Pull-Request: golang/go#71673
Reviewed-on: https://go-review.googlesource.com/c/go/+/648537
Reviewed-by: Michael Pratt <mpratt@google.com>
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os: document that OpenRoot follows symlinks

OpenRoot is expected to be called with a trusted path,
and does not attempt to defend against symlinks in that path.

Fixes #71806

Change-Id: Ib8b2e123e323d22d5c23ed9f711d21995139a7ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/650355
Auto-Submit: Damien Neil <dneil@google.com>
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syscall: disable O_DIRECTORY on Windows for js/wasm

O_DIRECTORY is not available on all platforms, as described at

https://nodejs.org/docs/latest/api/fs.html#file-open-constants .

On Windows, only O_APPEND, O_CREAT, O_EXCL, O_RDONLY, O_RDWR,
O_TRUNC, O_WRONLY, and UV_FS_O_FILEMAP are available.

Fixes #71758

Change-Id: Iacc890ba9a30dcd75eb746ec324fa0c3e368048e
GitHub-Last-Rev: a0160e8fc82583c4f903ae165fe9f204896cf56d
GitHub-Pull-Request: golang/go#71770
Reviewed-on: https://go-review.googlesource.com/c/go/+/650015
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
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all: use a more straightforward return value

Change-Id: I27e86c221da7f541c4823f501801e02942c9a829
Reviewed-on: https://go-review.googlesource.com/c/go/+/649935
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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go/format: format comment to match code

Change-Id: I9434a8d04ca4282da86cb2622a6a541db3961a2b
GitHub-Last-Rev: f28908e338e9160ca3d4033161647832fdd76840
GitHub-Pull-Request: golang/go#71763
Reviewed-on: https://go-review.googlesource.com/c/go/+/649955
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Auto-Submit: Ian Lance Taylor <iant@google.com>

os: deal with chmod error for TestRootConsistencyChmod

Previously the error returned by chmod has not actually been used.

Change-Id: I97c947a2278a084c58784fd100630ce2a54bfb03
GitHub-Last-Rev: ddc60a044f641d264c9ee88d87b2da7e2f766741
GitHub-Pull-Request: golang/go#71744
Reviewed-on: https://go-review.googlesource.com/c/go/+/649418
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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cmd/cgo: explicitly use void for functions with no parameters

Currently, exported Go functions with no parameters generate C functions
with an empty parameter list. In C, a function with an empty parameter
list can accept any number of arguments, whereas a function with a single
void parameter explicitly declares that it takes no arguments.

To align the generated C functions with their Go prototypes, update the
code generation to explicitly include a void parameter for functions
with no parameters.

Fixes #68411

Change-Id: Iab9456aa0236200bf21d1181a2e18e82869df63f
GitHub-Last-Rev: 6ff21a98dfef81df649c76221d9c0858dc0e35e1
GitHub-Pull-Request: golang/go#70981
Reviewed-on: https://go-review.googlesource.com/c/go/+/638635
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crypto/internal/fips140deps/cpu: use const and var blocks

Rather than repeating ourselves, use a single const block and a single
var block. Also separate architectures for readability.

Change-Id: Iab5bda3514eae0c9b5bb16a99277fd4b95f272aa
Reviewed-on: https://go-review.googlesource.com/c/go/+/649658
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
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Auto-Submit: Joel Sing <joel@sing.id.au>

runtime: remove unused fipstls_runtime_arg0 function

fipstls_runtime_arg0 is unused since CL 629675.

Change-Id: I981e55e95f4d1cbd33f4c438c1947ec39385376b
Reviewed-on: https://go-review.googlesource.com/c/go/+/631215
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Daniel McCarney <daniel@binaryparadox.net>
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runtime: print pp.schedtick in scheddetail even when !detailed

Provides, on one line, an approximation of P scheduling throughput: how
many times execute() was called for a given P. Said another way: how
many RUNNABLE to RUNNING transitions have happened for this P.

This allows discerning whether a P actually did anything, and how it
compares to other periods of a processes operation.

This should be useful to analyze (kernel) scheduler hiccups.

Investigators will want to subtract the tick values from subsequent
schedtrace lines to get a rate of schedulings. I've opted to add a space
around the first and last element as well to make it more uniform to do
the proposed subtracting with tools like AWK.

Change-Id: I69d6dae1509ad285d43799f38bcaa3aa0fb2352e
Reviewed-on: https://go-review.googlesource.com/c/go/+/635636
Reviewed-by: Michael Pratt <mpratt@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Nicolas Hillegeer <aktau@google.com>

runtime: only read pp.m in schedtrace if needed

Change-Id: Iad3353431a2ef97c1e0c440bdd84b78cb5ea990e
Reviewed-on: https://go-review.googlesource.com/c/go/+/635635
Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Nicolas Hillegeer <aktau@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

runtime: check LSE support on ARM64 at runtime init

Check presence of LSE support on ARM64 chip if we targeted it at compile
time.

Related to #69124
Updates #60905
Fixes #71411

Change-Id: I65e899a28ff64a390182572c0c353aa5931fc85d
Reviewed-on: https://go-review.googlesource.com/c/go/+/645795
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>

cmd/compile: on AMD64, turn x < 128 into x <= 127

x < 128 -> x <= 127
x >= 128 -> x > 127

This allows for shorter encoding as 127 fits into
a single-byte immediate.

archive/tar benchmark (Alder Lake 12600K)

name              old time/op    new time/op    delta
/Writer/USTAR-16    1.46µs ± 0%    1.32µs ± 0%  -9.43%  (p=0.008 n=5+5)
/Writer/GNU-16      1.85µs ± 1%    1.79µs ± 1%  -3.47%  (p=0.008 n=5+5)
/Writer/PAX-16      3.21µs ± 0%    3.11µs ± 2%  -2.96%  (p=0.008 n=5+5)
/Reader/USTAR-16    1.38µs ± 1%    1.37µs ± 0%    ~     (p=0.127 n=5+4)
/Reader/GNU-16       798ns ± 1%     800ns ± 2%    ~     (p=0.548 n=5+5)
/Reader/PAX-16      3.07µs ± 1%    3.00µs ± 0%  -2.35%  (p=0.008 n=5+5)
[Geo mean]          1.76µs         1.70µs       -3.15%

compilecmp:

hash/maphash
hash/maphash.(*Hash).Write 517 -> 510  (-1.35%)

runtime
runtime.traceReadCPU 1626 -> 1615  (-0.68%)

runtime [cmd/compile]
runtime.traceReadCPU 1626 -> 1615  (-0.68%)

math/rand/v2
type:.eq.[128]float32 65 -> 59  (-9.23%)

bytes
bytes.trimLeftUnicode 378 -> 373  (-1.32%)
bytes.IndexAny 1189 -> 1157  (-2.69%)
bytes.LastIndexAny 1256 -> 1239  (-1.35%)
bytes.lastIndexFunc 263 -> 261  (-0.76%)

strings
strings.FieldsFuncSeq.func1 411 -> 399  (-2.92%)
strings.EqualFold 625 -> 624  (-0.16%)
strings.trimLeftUnicode 248 -> 231  (-6.85%)

math/rand
type:.eq.[128]float32 65 -> 59  (-9.23%)

bytes [cmd/compile]
bytes.LastIndexAny 1256 -> 1239  (-1.35%)
bytes.lastIndexFunc 263 -> 261  (-0.76%)
bytes.trimLeftUnicode 378 -> 373  (-1.32%)
bytes.IndexAny 1189 -> 1157  (-2.69%)

regexp/syntax
regexp/syntax.(*parser).parseEscape 1113 -> 1102  (-0.99%)

math/rand/v2 [cmd/compile]
type:.eq.[128]float32 65 -> 59  (-9.23%)

strings [cmd/compile]
strings.EqualFold 625 -> 624  (-0.16%)
strings.FieldsFuncSeq.func1 411 -> 399  (-2.92%)
strings.trimLeftUnicode 248 -> 231  (-6.85%)

math/rand [cmd/compile]
type:.eq.[128]float32 65 -> 59  (-9.23%)

regexp
regexp.(*inputString).context 198 -> 197  (-0.51%)
regexp.(*inputBytes).context 221 -> 212  (-4.07%)

image/jpeg
image/jpeg.(*decoder).processDQT 500 -> 491  (-1.80%)

regexp/syntax [cmd/compile]
regexp/syntax.(*parser).parseEscape 1113 -> 1102  (-0.99%)

regexp [cmd/compile]
regexp.(*inputString).context 198 -> 197  (-0.51%)
regexp.(*inputBytes).context 221 -> 212  (-4.07%)

encoding/csv
encoding/csv.(*Writer).fieldNeedsQuotes 269 -> 266  (-1.12%)

cmd/vendor/golang.org/x/sys/unix
type:.eq.[131]struct 855 -> 823  (-3.74%)

vendor/golang.org/x/text/unicode/norm
vendor/golang.org/x/text/unicode/norm.nextDecomposed 4831 -> 4826  (-0.10%)
vendor/golang.org/x/text/unicode/norm.(*Iter).returnSlice 281 -> 275  (-2.14%)

vendor/golang.org/x/text/secure/bidirule
vendor/golang.org/x/text/secure/bidirule.init.0 85 -> 83  (-2.35%)

go/scanner
go/scanner.isDigit 100 -> 98  (-2.00%)
go/scanner.(*Scanner).next 431 -> 422  (-2.09%)
go/scanner.isLetter 142 -> 124  (-12.68%)

encoding/asn1
encoding/asn1.parseTagAndLength 1189 -> 1182  (-0.59%)
encoding/asn1.makeField 3481 -> 3463  (-0.52%)

text/scanner
text/scanner.(*Scanner).next 1242 -> 1236  (-0.48%)

archive/tar
archive/tar.isASCII 133 -> 127  (-4.51%)
archive/tar.(*Writer).writeRawFile 1206 -> 1198  (-0.66%)
archive/tar.(*Reader).readHeader.func1 9 -> 7  (-22.22%)
archive/tar.toASCII 393 -> 383  (-2.54%)
archive/tar.splitUSTARPath 405 -> 396  (-2.22%)
archive/tar.(*Writer).writePAXHeader.func1 627 -> 620  (-1.12%)

text/template
text/template.jsIsSpecial 59 -> 57  (-3.39%)

go/doc
go/doc.assumedPackageName 714 -> 701  (-1.82%)

vendor/golang.org/x/net/http/httpguts
vendor/golang.org/x/net/http/httpguts.headerValueContainsToken 965 -> 952  (-1.35%)
vendor/golang.org/x/net/http/httpguts.tokenEqual 280 -> 269  (-3.93%)
vendor/golang.org/x/net/http/httpguts.IsTokenRune 28 -> 26  (-7.14%)

net/mail
net/mail.isVchar 26 -> 24  (-7.69%)
net/mail.isAtext 106 -> 104  (-1.89%)
net/mail.(*Address).String 1084 -> 1052  (-2.95%)
net/mail.isQtext 39 -> 37  (-5.13%)
net/mail.isMultibyte 9 -> 7  (-22.22%)
net/mail.isDtext 45 -> 43  (-4.44%)
net/mail.(*addrParser).consumeQuotedString 1050 -> 1029  (-2.00%)
net/mail.quoteString 741 -> 714  (-3.64%)

cmd/internal/obj/s390x
cmd/internal/obj/s390x.preprocess 6405 -> 6393  (-0.19%)

cmd/internal/obj/x86
cmd/internal/obj/x86.toDisp8 303 -> 301  (-0.66%)

fmt [cmd/compile]
fmt.Fprintf 4726 -> 4662  (-1.35%)

go/scanner [cmd/compile]
go/scanner.(*Scanner).next 431 -> 422  (-2.09%)
go/scanner.isLetter 142 -> 124  (-12.68%)
go/scanner.isDigit 100 -> 98  (-2.00%)

cmd/compile/internal/syntax
cmd/compile/internal/syntax.(*source).nextch 879 -> 847  (-3.64%)

cmd/vendor/golang.org/x/mod/module
cmd/vendor/golang.org/x/mod/module.checkElem 1253 -> 1235  (-1.44%)
cmd/vendor/golang.org/x/mod/module.escapeString 519 -> 517  (-0.39%)

go/doc [cmd/compile]
go/doc.assumedPackageName 714 -> 701  (-1.82%)

cmd/compile/internal/syntax [cmd/compile]
cmd/compile/internal/syntax.(*scanner).escape 1965 -> 1933  (-1.63%)
cmd/compile/internal/syntax.(*scanner).next 8975 -> 8847  (-1.43%)

cmd/internal/obj/s390x [cmd/compile]
cmd/internal/obj/s390x.preprocess 6405 -> 6393  (-0.19%)

cmd/internal/obj/x86 [cmd/compile]
cmd/internal/obj/x86.toDisp8 303 -> 301  (-0.66%)

cmd/internal/gcprog
cmd/internal/gcprog.(*Writer).Repeat 688 -> 677  (-1.60%)
cmd/internal/gcprog.(*Writer).varint 442 -> 439  (-0.68%)

cmd/compile/internal/ir
cmd/compile/internal/ir.splitPkg 331 -> 325  (-1.81%)

cmd/compile/internal/ir [cmd/compile]
cmd/compile/internal/ir.splitPkg 331 -> 325  (-1.81%)

net/http
net/http.containsDotDot.FieldsFuncSeq.func1 411 -> 399  (-2.92%)
net/http.isNotToken 33 -> 30  (-9.09%)
net/http.containsDotDot 606 -> 588  (-2.97%)
net/http.isCookieNameValid 197 -> 191  (-3.05%)
net/http.parsePattern 4330 -> 4317  (-0.30%)
net/http.ParseCookie 1099 -> 1096  (-0.27%)
net/http.validMethod 197 -> 187  (-5.08%)

cmd/vendor/golang.org/x/text/unicode/norm
cmd/vendor/golang.org/x/text/unicode/norm.(*Iter).returnSlice 281 -> 275  (-2.14%)
cmd/vendor/golang.org/x/text/unicode/norm.nextDecomposed 4831 -> 4826  (-0.10%)

net/http/cookiejar
net/http/cookiejar.encode 1936 -> 1918  (-0.93%)

expvar
expvar.appendJSONQuote 972 -> 965  (-0.72%)

cmd/cgo/internal/test
cmd/cgo/internal/test.stack128 116 -> 114  (-1.72%)

cmd/vendor/rsc.io/markdown
cmd/vendor/rsc.io/markdown.newATXHeading 1637 -> 1628  (-0.55%)
cmd/vendor/rsc.io/markdown.isUnicodePunct 197 -> 179  (-9.14%)

Change-Id: I578bdf42ef229d687d526e378d697ced51e1880c
Reviewed-on: https://go-review.googlesource.com/c/go/+/639935
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@google.com>

runtime/maps: fix typo in group.go comment (H1 -> H2)

Fixes a typo to correctly describe the hash bits of the control word.

Change-Id: Id3c2ae0bd529e579a95258845f9d8028e23d10d2
GitHub-Last-Rev: 1baa81be5d292d5625d5d7788b8ea090453f962c
GitHub-Pull-Request: golang/go#71730
Reviewed-on: https://go-review.googlesource.com/c/go/+/649416
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>

crypto/internal/boring: remove unnecessary struct field

That could result in a hanging pointer.

Change-Id: I547950a3d3010e03b75f70f5f021f20124e2cef0
Reviewed-on: https://go-review.googlesource.com/c/go/+/644120
Auto-Submit: Roland Shoemaker <roland@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

std: add //go:fix inline directives to some deprecated functions

In particular, we apply it only to functions where it is always
a code improvement to inline the call.
We also apply it to some constants.

In a few cases this may introduce a panic statement at the
caller, which is debatable, but making the potential for panic
evident is the purpose of the deprecation.

The gofix analyzer in gopls v0.18 will show a diagnostic for calls
to the annotated functions, and will offer to inline the call.

The new //go:fix annotation needs a special exemption in the
pragma check in the compiler.

Updates #32816

Change-Id: I43bf15648ac12251734109eb7102394f8a76d55e
Reviewed-on: https://go-review.googlesource.com/c/go/+/648995
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Commit-Queue: Alan Donovan <adonovan@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

cmd/compile: fix sign extension of paired 32-bit loads on arm64

Fixes #71759

Change-Id: Iab05294ac933cc9972949158d3fe2bdc3073df5e
Reviewed-on: https://go-review.googlesource.com/c/go/+/649895
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

crypto/internal/fips140/subtle: provide riscv64 assembly implementation for xorBytes

Provide a riscv64 assembly implementation of xorBytes, which
can process up to 64 bytes per loop and has better handling
for unaligned inputs. This provides a considerable performance
gain compared to the generic code.

On a StarFive VisionFive 2:

                                     │   subtle.1   │              subtle.2               │
                                     │    sec/op    │   sec/op     vs base                │
XORBytes/8Bytes-4                       59.54n ± 0%   58.15n ± 0%   -2.33% (p=0.000 n=10)
XORBytes/128Bytes-4                    125.60n ± 0%   74.93n ± 0%  -40.35% (p=0.000 n=10)
XORBytes/2048Bytes-4                   1088.5n ± 0%   602.4n ± 0%  -44.66% (p=0.000 n=10)
XORBytes/8192Bytes-4                    4.163µ ± 0%   2.271µ ± 0%  -45.45% (p=0.000 n=10)
XORBytes/32768Bytes-4                   35.47µ ± 0%   28.12µ ± 0%  -20.74% (p=0.000 n=10)
XORBytesUnaligned/8Bytes0Offset-4       59.80n ± 0%   57.48n ± 0%   -3.86% (p=0.000 n=10)
XORBytesUnaligned/8Bytes1Offset-4       72.97n ± 0%   57.48n ± 0%  -21.23% (p=0.000 n=10)
XORBytesUnaligned/8Bytes2Offset-4       72.97n ± 0%   57.50n ± 0%  -21.21% (p=0.000 n=10)
XORBytesUnaligned/8Bytes3Offset-4       72.99n ± 0%   57.48n ± 0%  -21.26% (p=0.000 n=10)
XORBytesUnaligned/8Bytes4Offset-4       72.96n ± 0%   57.44n ± 0%  -21.28% (p=0.000 n=10)
XORBytesUnaligned/8Bytes5Offset-4       72.93n ± 0%   57.48n ± 0%  -21.18% (p=0.000 n=10)
XORBytesUnaligned/8Bytes6Offset-4       72.97n ± 0%   57.47n ± 0%  -21.25% (p=0.000 n=10)
XORBytesUnaligned/8Bytes7Offset-4       72.96n ± 0%   57.47n ± 0%  -21.24% (p=0.000 n=10)
XORBytesUnaligned/128Bytes0Offset-4    125.30n ± 0%   74.18n ± 0%  -40.80% (p=0.000 n=10)
XORBytesUnaligned/128Bytes1Offset-4     557.4n ± 0%   131.1n ± 0%  -76.48% (p=0.000 n=10)
XORBytesUnaligned/128Bytes2Offset-4     557.3n ± 0%   132.5n ± 0%  -76.22% (p=0.000 n=10)
XORBytesUnaligned/128Bytes3Offset-4     557.6n ± 0%   133.7n ± 0%  -76.02% (p=0.000 n=10)
XORBytesUnaligned/128Bytes4Offset-4     557.4n ± 0%   125.0n ± 0%  -77.57% (p=0.000 n=10)
XORBytesUnaligned/128Bytes5Offset-4     557.7n ± 0%   125.7n ± 0%  -77.46% (p=0.000 n=10)
XORBytesUnaligned/128Bytes6Offset-4     557.5n ± 0%   127.0n ± 0%  -77.22% (p=0.000 n=10)
XORBytesUnaligned/128Bytes7Offset-4     557.7n ± 0%   128.3n ± 0%  -76.99% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes0Offset-4   1088.5n ± 0%   601.9n ± 0%  -44.71% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes1Offset-4   8243.0n ± 0%   655.7n ± 0%  -92.05% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes2Offset-4   8244.0n ± 0%   657.1n ± 0%  -92.03% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes3Offset-4   8247.5n ± 0%   658.7n ± 0%  -92.01% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes4Offset-4   8243.0n ± 0%   649.8n ± 0%  -92.12% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes5Offset-4   8247.0n ± 0%   650.2n ± 0%  -92.12% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes6Offset-4   8243.0n ± 0%   651.6n ± 0%  -92.09% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes7Offset-4   8244.0n ± 0%   652.8n ± 0%  -92.08% (p=0.000 n=10)
geomean                                 410.1n        147.2n       -64.10%

                                     │   subtle.1   │                subtle.2                 │
                                     │     B/s      │      B/s       vs base                  │
XORBytes/8Bytes-4                      128.1Mi ± 0%    131.2Mi ± 0%     +2.40% (p=0.000 n=10)
XORBytes/128Bytes-4                    971.6Mi ± 0%   1629.2Mi ± 0%    +67.69% (p=0.000 n=10)
XORBytes/2048Bytes-4                   1.752Gi ± 0%    3.166Gi ± 0%    +80.68% (p=0.000 n=10)
XORBytes/8192Bytes-4                   1.833Gi ± 0%    3.360Gi ± 0%    +83.35% (p=0.000 n=10)
XORBytes/32768Bytes-4                  881.0Mi ± 0%   1111.5Mi ± 0%    +26.16% (p=0.000 n=10)
XORBytesUnaligned/8Bytes0Offset-4      127.6Mi ± 0%    132.7Mi ± 0%     +4.02% (p=0.000 n=10)
XORBytesUnaligned/8Bytes1Offset-4      104.5Mi ± 0%    132.7Mi ± 0%    +26.95% (p=0.000 n=10)
XORBytesUnaligned/8Bytes2Offset-4      104.6Mi ± 0%    132.7Mi ± 0%    +26.92% (p=0.000 n=10)
XORBytesUnaligned/8Bytes3Offset-4      104.5Mi ± 0%    132.8Mi ± 0%    +27.01% (p=0.000 n=10)
XORBytesUnaligned/8Bytes4Offset-4      104.6Mi ± 0%    132.8Mi ± 0%    +27.02% (p=0.000 n=10)
XORBytesUnaligned/8Bytes5Offset-4      104.6Mi ± 0%    132.7Mi ± 0%    +26.89% (p=0.000 n=10)
XORBytesUnaligned/8Bytes6Offset-4      104.5Mi ± 0%    132.8Mi ± 0%    +26.99% (p=0.000 n=10)
XORBytesUnaligned/8Bytes7Offset-4      104.6Mi ± 0%    132.8Mi ± 0%    +26.97% (p=0.000 n=10)
XORBytesUnaligned/128Bytes0Offset-4    974.4Mi ± 0%   1645.7Mi ± 0%    +68.90% (p=0.000 n=10)
XORBytesUnaligned/128Bytes1Offset-4    219.0Mi ± 0%    931.3Mi ± 0%   +325.23% (p=0.000 n=10)
XORBytesUnaligned/128Bytes2Offset-4    219.0Mi ± 0%    921.2Mi ± 0%   +320.57% (p=0.000 n=10)
XORBytesUnaligned/128Bytes3Offset-4    218.9Mi ± 0%    912.9Mi ± 0%   +316.97% (p=0.000 n=10)
XORBytesUnaligned/128Bytes4Offset-4    219.0Mi ± 0%    976.4Mi ± 0%   +345.85% (p=0.000 n=10)
XORBytesUnaligned/128Bytes5Offset-4    218.9Mi ± 0%    971.2Mi ± 0%   +343.70% (p=0.000 n=10)
XORBytesUnaligned/128Bytes6Offset-4    219.0Mi ± 0%    961.1Mi ± 0%   +338.86% (p=0.000 n=10)
XORBytesUnaligned/128Bytes7Offset-4    218.9Mi ± 0%    951.1Mi ± 0%   +334.52% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes0Offset-4   1.752Gi ± 0%    3.169Gi ± 0%    +80.83% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes1Offset-4   236.9Mi ± 0%   2978.6Mi ± 0%  +1157.10% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes2Offset-4   236.9Mi ± 0%   2972.1Mi ± 0%  +1154.48% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes3Offset-4   236.8Mi ± 0%   2965.1Mi ± 0%  +1152.05% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes4Offset-4   236.9Mi ± 0%   3005.9Mi ± 0%  +1168.65% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes5Offset-4   236.8Mi ± 0%   3004.0Mi ± 0%  +1168.42% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes6Offset-4   236.9Mi ± 0%   2997.2Mi ± 0%  +1164.96% (p=0.000 n=10)
XORBytesUnaligned/2048Bytes7Offset-4   236.9Mi ± 0%   2991.9Mi ± 0%  +1162.93% (p=0.000 n=10)
geomean                                260.4Mi         806.7Mi        +209.73%

Change-Id: I9bec9c8f48df7284f8414ac745615c2a093e9ae9
Reviewed-on: https://go-review.googlesource.com/c/go/+/639858
Reviewed-by: Mark Ryan <markdryan@rivosinc.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Meng Zhuo <mengzhuo1203@gmail.com>
TryBot-Bypass: Joel Sing <joel@sing.id.au>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

os: explicitly return nil for rootChown in root_openat.go

It is consistent with the same function in root_noopenat.go.

Change-Id: I6ddbf4dfcc725cb2023bc6bed961cc525b9c43d2
GitHub-Last-Rev: 0802150a6a8e5d4bd395b702ecc518df1e8dd4c0
GitHub-Pull-Request: golang/go#71743
Reviewed-on: https://go-review.googlesource.com/c/go/+/649417
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
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cmd/internal/obj/riscv: support MOVD with floating point constants

Currently, we only support loading of values from memory (or other
registers). Add floating point constant support to MOVD. This is
implemented by storing the floating point constant to a symbol,
which is then loaded into the floating point register.

Change-Id: I6db242d27f606f0d5d084a3ab93538698d3a4f8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/631876
Reviewed-by: Meng Zhuo <mengzhuo1203@gmail.com>
Reviewed-by: Mark Ryan <markdryan@rivosinc.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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runtime: use return for async preemption resumption on arm64

Use return with register for async preemption resumption on arm64.
This has the same behaviour as the current use of JMP, however
is permitted when Branch Target Identification is being enforced,
while a JMP with register is considered an indirect call and
requires a `BTI J` marker at the resumption address.

Updates #66054

Change-Id: I135ac577073467bedd9efd8df15b76c97dc08767
Reviewed-on: https://go-review.googlesource.com/c/go/+/646782
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>

cmd/go/internal: use pathpkg name more

The package "path" is already imported under the name pathpkg and used
many times in these files. It's not worth it to also make it available
under the name path, so keep using pathpkg.

Change-Id: I7f8fa7a11de338b9a7c0f58a48d5af68b5639cfe
Reviewed-on: https://go-review.googlesource.com/c/go/+/630475
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Sam Thanawalla <samthanawalla@google.com>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

crypto/internal/fips140/edwards25519: make Scalar.SetCanonicalBytes constant time

Internally we only use SetCanonicalBytes as part of Ed25519
verification, where all inputs are public, so it doesn't need to be
constant time.

However, this code is replicated outside of the standard library. Even
there, an attack is not practical, so this should not be considered a
security vulnerability:

  - For specific scalars, this only leaks at most four bits of
    information, and always the same four bits (so it's not an adaptive
    attack).

  - For derived scalars, assuming they are valid and uniformly
    distributed, the loop would return true on the first iteration with
    probability (1 - 2⁻¹²⁷) due to the shape of the scalar field order.

Still, making it constant time is easy enough and saves the next person
from having to think about it.

This was previously reported by Yawning Angel, and then as part of a
security audit.

Change-Id: I6a6a46563c8abecb0b4a6f12033a71c4c4da6fa7
Reviewed-on: https://go-review.googlesource.com/c/go/+/648035
Reviewed-by: Roland Shoemaker <roland@golang.org>
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Auto-Submit: Filippo Valsorda <filippo@golang.org>

internal/godebugs: add fips140 as an opaque godebug setting

This permits using "godebug fips140=on" in go.mod and
using "//go:debug fips140=on" in the main package.

Change code references to the godebug setting to remove the #
which is no longer required.

For #71666

Change-Id: I3a60ecc55b03848dadd6d431eb43137b6df6568b
Reviewed-on: https://go-review.googlesource.com/c/go/+/649495
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
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Reviewed-by: Filippo Valsorda <filippo@golang.org>

crypto/rsa: add benchmarks for not and partially optimized keys

Updates #59695

Change-Id: I7944195c805cd9da819cdf2bd49ecb2423ccd73b
Reviewed-on: https://go-review.googlesource.com/c/go/+/637178
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
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Reviewed-by: Daniel McCarney <daniel@binaryparadox.net>

doc/godebug: mention GODEBUG=fips140

Fixes #71666

Change-Id: Ice816cf2943c5b6660f05934b4c7ca38545714b0
Reviewed-on: https://go-review.googlesource.com/c/go/+/648520
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Commit-Queue: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>

cmd/compile: add type-based alias analysis

Make ssa.disjoint call ssa.disjointTypes to disambiguate Values based on
their types. Only one type-based rule is employed: a Type can't alias
with a pointer (https://pkg.go.dev/unsafe#Pointer).

Fixes #70488

Change-Id: I5a7e75292c2b6b5a01fb9048e3e2360e31dbcdd9
Reviewed-on: https://go-review.googlesource.com/c/go/+/632176
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Keith Randall <khr@google.com>

bytes: add examples for Lines, SplitSeq, SplitAfterSeq, FieldsSeq and FieldsFuncSeq

Change-Id: I0e755d5c73f14d2c98853bdd31a7f2e84c92a906
Reviewed-on: https://go-review.googlesource.com/c/go/+/648860
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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internal/syscall/unix: correct fchmodat on openbsd

This is incorrectly calling the fchownat trampoline - call fchmodat
as intended.

Change-Id: I7b1e758d456006303ca95b70df9e6b52d3020158
Reviewed-on: https://go-review.googlesource.com/c/go/+/649655
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Bypass: Damien Neil <dneil@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
Commit-Queue: Damien Neil <dneil@google.com>
Auto-Submit: Damien Neil <dneil@google.com>

syscall: skip testAmbientCaps tests if there is no nobody user

When there is not a nobody user (for example inside Docker), the
tests TestAmbientCaps and TestAmbientCapsUserns should be skipped
instead of failing.

Fixes #71644

Change-Id: I7f92db19e2b6f449d8d897650a0ecd89f5150f4a
GitHub-Last-Rev: a4c4f5bb61929b4981dc0b92d773bd4ef13d7d3d
GitHub-Pull-Request: golang/go#71729
Reviewed-on: https://go-review.googlesource.com/c/go/+/649396
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>

internal/syscall/unix: fix fchownat linkname for AIX & Solaris

Typo fix: libc_chownat => libc_fchownat

Change-Id: I6721a988c19e3438b967a73559159c948ed51a0e
Reviewed-on: https://go-review.googlesource.com/c/go/+/649636
Auto-Submit: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>

net/http: use runtime.AddCleanup instead of runtime.SetFinalizer

Replace the usage of runtime.SetFinalizer with runtime.AddCleanup in
tests.

Updates #70907

Change-Id: Idd3f1c07f6a7709352ca09948fbcb4a0ad9418bb
Reviewed-on: https://go-review.googlesource.com/c/go/+/648655
Auto-Submit: Carlos Amedee <carlos@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
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internal/trace: emit sync event before deferred spilled error

CL 648315 and CL 648195 fixed #71615 in the case where we fail to read
the next generation by emitting an extra sync event before returning an
error. But, it's possible we failed to even read the next spilled batch
when we read the first generation, and have been carrying the error from
trying to read a spilled batch since the last generation. In this case,
we don't emit a final sync event, meaning that there are still some
cases where #71615 happens.

This change emits the final sync event in this corner case. I believe
this is the final corner case. I could previously reproduce the issue
by running the test under stress2, but I can no longer reproduce any
failures after this change.

Fixes #71615, for real this time.

Change-Id: I10688a3c0e4b8327a95f31add365338c77c091ab
Reviewed-on: https://go-review.googlesource.com/c/go/+/649259
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
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