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46107 Commits

Author SHA1 Message Date
Joel Sing
e084d84420 cmd/internal/objabi: declare HeadType String on a non-pointer receiver
objabi.HeadType is typically used as a non-pointer type, however the String function
is declared on a pointer receiver. This means that in most cases its integer value
is printed, rather than the value from the String function.

Change-Id: I3d28d9680e88a714bc1152ed5e1df4ac43d7a33f
Reviewed-on: https://go-review.googlesource.com/c/go/+/430556
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Jenny Rakoczy <jenny@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Jenny Rakoczy <jenny@golang.org>
2022-09-13 17:39:55 +00:00
cui fliter
09f3ff174c strings: add a test case of growLen is negative
Before committing,  the test coverage of strings/builder.go is 97.4%
After committing,  the test coverage of strings/builder.go is 100%

Change-Id: I22643b1c4632b5ca7ef98362f32bb85faae80bad
GitHub-Last-Rev: 2a55ca3e33
GitHub-Pull-Request: golang/go#55004
Reviewed-on: https://go-review.googlesource.com/c/go/+/430156
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Jenny Rakoczy <jenny@golang.org>
2022-09-13 17:39:52 +00:00
Joel Sing
77420fa119 cmd/link: generate an error if the entry symbol cannot be found
If the entry symbol cannot be found (for example, a new port is being brought
up and no rt0 code has been provided), the linker will currently panic. Rather
than panicing, generate an error that aids in debugging:

	missing entry symbol "_rt0_arm64_openbsd"

Change-Id: I9cc38eaab48f730d596ca7fa9e9e3d68250ae4d3
Reviewed-on: https://go-review.googlesource.com/c/go/+/430555
Auto-Submit: Jenny Rakoczy <jenny@golang.org>
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2022-09-13 17:39:33 +00:00
Joe Tsai
f7396aaea0 time: optimize Parse for RFC3339 and RFC3339Nano
RFC 3339 is the most common time representation,
being used in an overwhelming 57.3% of all specified formats,
while the next competitor only holds 7.5% usage.
Specially optimize parsing to handle the RFC 3339 format.
To reduce the complexity of error checking,
parseRFC3339 simply returns a bool indicating parsing success.
It leaves error handling to the general parse path.

To assist in fuzzing, the internal parse function was left unmodified
so that we could test that parseRFC3339 and parse agree with each other.

Performance:

	name             old time/op  new time/op  delta
	ParseRFC3339UTC  112ns ± 1%   37ns ± 1%    -67.37%  (p=0.000 n=9+9)
	ParseRFC3339TZ   259ns ± 2%   67ns ± 1%    -73.92%  (p=0.000 n=10+9)

Credit goes to Amarjeet Anand for a prior CL attemping to optimize this.
See CL 425014.

Fixes #54093

Change-Id: I14f4e8c52b092d44ceef6863f261842ed7e83f4c
Reviewed-on: https://go-review.googlesource.com/c/go/+/425197
Reviewed-by: Rob Pike <r@golang.org>
Run-TryBot: Joseph Tsai <joetsai@digital-static.net>
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2022-09-13 17:35:58 +00:00
Cuong Manh Le
7ffbcd1987 runtime: replace stringStruct with unsafe.String where appropriate
Simplify the code a bit, no significant performance changes.

name                             old time/op    new time/op    delta
HashStringSpeed-8                  9.64ns ±11%    8.91ns ± 9%   -7.60%  (p=0.007 n=10+10)
HashStringArraySpeed-8             19.8ns ± 3%    19.5ns ± 2%     ~     (p=0.085 n=10+10)
MapStringKeysEight_16-8            10.7ns ± 3%    10.2ns ± 2%   -4.48%  (p=0.000 n=10+10)
MapStringKeysEight_32-8            8.89ns ± 3%    8.71ns ± 3%     ~     (p=0.082 n=9+10)
MapStringKeysEight_64-8            8.84ns ± 2%    8.60ns ± 3%   -2.73%  (p=0.004 n=9+10)
MapStringKeysEight_1M-8            8.90ns ± 3%    8.62ns ± 3%   -3.15%  (p=0.000 n=10+10)
MapStringConversion/32/simple-8    8.62ns ± 3%    8.61ns ± 2%     ~     (p=0.895 n=10+10)
MapStringConversion/32/struct-8    8.53ns ± 2%    8.63ns ± 2%     ~     (p=0.123 n=10+10)
MapStringConversion/32/array-8     8.54ns ± 2%    8.50ns ± 1%     ~     (p=0.590 n=9+9)
MapStringConversion/64/simple-8    8.44ns ± 2%    8.38ns ± 2%     ~     (p=0.353 n=10+10)
MapStringConversion/64/struct-8    8.41ns ± 2%    8.48ns ± 2%     ~     (p=0.143 n=10+10)
MapStringConversion/64/array-8     8.42ns ± 2%    8.44ns ± 2%     ~     (p=0.739 n=10+10)
MapInterfaceString-8               13.6ns ±26%    13.6ns ±20%     ~     (p=0.736 n=10+9)
AppendGrowString-8                 38.9ms ± 9%    40.2ms ±13%     ~     (p=0.481 n=10+10)
CompareStringEqual-8               3.03ns ± 2%    2.86ns ± 3%   -5.58%  (p=0.000 n=10+10)
CompareStringIdentical-8           1.20ns ± 3%    1.01ns ± 4%  -16.16%  (p=0.000 n=10+10)
CompareStringSameLength-8          2.11ns ± 3%    1.85ns ± 3%  -12.33%  (p=0.000 n=10+10)
CompareStringDifferentLength-8     0.30ns ± 0%    0.30ns ± 0%     ~     (p=0.508 n=10+9)
CompareStringBigUnaligned-8        43.0µs ± 1%    42.8µs ± 2%     ~     (p=0.165 n=10+10)
CompareStringBig-8                 43.2µs ± 2%    43.4µs ± 2%     ~     (p=0.661 n=9+10)
ConcatStringAndBytes-8             15.1ns ± 1%    14.9ns ± 1%   -1.57%  (p=0.001 n=8+10)
SliceByteToString/1-8              2.45ns ± 2%    2.39ns ± 2%   -2.64%  (p=0.000 n=10+10)
SliceByteToString/2-8              10.9ns ± 2%    10.8ns ± 4%     ~     (p=0.060 n=10+10)
SliceByteToString/4-8              11.9ns ± 0%    11.8ns ± 1%   -0.97%  (p=0.000 n=8+8)
SliceByteToString/8-8              13.9ns ± 1%    13.9ns ± 1%   +0.57%  (p=0.009 n=9+9)
SliceByteToString/16-8             18.0ns ± 3%    18.6ns ± 5%   +2.78%  (p=0.001 n=9+10)
SliceByteToString/32-8             20.1ns ± 3%    20.5ns ± 5%   +2.10%  (p=0.034 n=10+10)
SliceByteToString/64-8             24.3ns ± 3%    24.9ns ± 3%   +2.28%  (p=0.001 n=9+10)
SliceByteToString/128-8            33.8ns ± 1%    34.5ns ± 4%     ~     (p=0.264 n=8+10)

Updates #54854

Change-Id: I7ce57a92c5f590fa8cb31a48969d281147eb05f1
Reviewed-on: https://go-review.googlesource.com/c/go/+/428759
Reviewed-by: hopehook <hopehook@golangcn.org>
Reviewed-by: Keith Randall <khr@google.com>
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2022-09-13 16:42:28 +00:00
Tobias Klauser
d36466fe2a cmd/link/internal/ld, syscall: use libc based msync on darwin for Go ≥ 1.20
Direct syscalls should no longer be used on darwin. Instead, directly
call libc's msync when using Go ≥ 1.20 for bootstrap.

For #54265

Change-Id: Ie3f1e6ccd1a06e7f0ddd88cdef5067393a69e8db
Reviewed-on: https://go-review.googlesource.com/c/go/+/430336
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2022-09-13 15:50:02 +00:00
Tobias Klauser
8df21a7802 cmd/link/internal/ld: drop Go 1.12 compatibility on darwin
Go 1.17 is the minimum required version for bootstrap as of Go 1.20.
Also, the package no longer builds with Go 1.12 used for bootstrap.
Thus, drop the Go 1.12 compatibility and used linkname unconditionally.

For #44505

Change-Id: Ic160aba4a33d580987b4633a3db03a025804d090
Reviewed-on: https://go-review.googlesource.com/c/go/+/430335
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2022-09-13 15:49:37 +00:00
Robert Griesemer
dad2966a83 go/types, types2: don't print function parameter names when showing type differences
Add a new flag 'paramNames' to typeWriter struct to control whether
function parameter names are written or not (set by default). Unset
it when we want the function signature w/o parameter names, e.g. when
showing two signatures that are not identical. This makes is much
easier to see the typw differences in the error message.

To avoid needing to provide yet another (rarely used) boolean parameter
to typeString, remove that function in favor of setting the paramNames
flag explicitly. Adjust the code in errors.go that used typeString; the
resulting code is also more efficient (fewer bytes.Buffer allocations).

While at it, rename the typeWriter 'debug' field to 'tpSubscripts'
because that is what it controls.

Add test case and adjusted existing expected output for existing tests.

Fixes #54942.

Change-Id: I625eae30c403c39ce89951b8ea6214d783c92c75
Reviewed-on: https://go-review.googlesource.com/c/go/+/430416
Reviewed-by: Robert Findley <rfindley@google.com>
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2022-09-13 12:58:04 +00:00
Robert Griesemer
c7a0b15659 go/types, types2: consistently use _UnsupportedFeature error code
Change-Id: Ie880871bb855e1c1f6e543508bdc7dd415451ba3
Reviewed-on: https://go-review.googlesource.com/c/go/+/429735
Reviewed-by: Robert Griesemer <gri@google.com>
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2022-09-13 12:38:14 +00:00
Robert Griesemer
f4a587ba6e types2: provide error codes to error reporting
This CL adds a suitable error code to every error reporting,
matching what go/types already does.

For now, the error codes are not progagated through the API,
but eventually they will be available to clients.

Also, for now the errorcodes.go file is a 1:1 copy (with
adjusted package name) of go/types/errorcodes.go.
A subsequent CL will factor out this file.

In contrast to go/types, for errors due to incorrect Go version,
the error code is always _UnsupportedFeature. In go/types, the
error sometimes is related to the specific operation.

Change-Id: I18771bc3d00bbdbf6d705bf25f2aea3c3d977b1c
Reviewed-on: https://go-review.googlesource.com/c/go/+/429355
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2022-09-13 12:37:11 +00:00
Cuong Manh Le
54182ff54a internal/syscall/windows: simplify unsafe.Slice usage
CL 428780 used unsafe.Slice instead of unsafeheader for simplifiying the
code. However, it can be even simpler, since "p" is already a *uin16,
the unsafe cast is not necessary.

Change-Id: Idc492b73518637997e85c0b33f8591bd19b7929f
Reviewed-on: https://go-review.googlesource.com/c/go/+/429915
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2022-09-09 20:29:05 +00:00
cuiweixie
59ba97bf3b cmd/go: record the -buildmode flag in debug.BuildInfo
Fixes #53856

Change-Id: Ib533e9fbe063b74c81f6512464a4dac5e2af0ccc
GitHub-Last-Rev: c2ae8d6f75
GitHub-Pull-Request: golang/go#54218
Reviewed-on: https://go-review.googlesource.com/c/go/+/420937
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2022-09-09 20:25:35 +00:00
cui fliter
b244b89d56 net/http: convert allowQuerySemicolonsInUse to atomic type
For #53821

Change-Id: I135783bd5472011f6a74d2f5ee34ce96ff49ad2b
GitHub-Last-Rev: 4da2d67ff3
GitHub-Pull-Request: golang/go#54863
Reviewed-on: https://go-review.googlesource.com/c/go/+/428336
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2022-09-09 18:42:57 +00:00
Cuong Manh Le
e509452727 sync: convert RWMutex.{readerCount,readerWait} to atomic type
Change-Id: I7fd9c0636cd00891f5cdf36c0f68f897772042f2
Reviewed-on: https://go-review.googlesource.com/c/go/+/429767
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2022-09-09 18:28:35 +00:00
Cuong Manh Le
9dd9174fa5 sync/atomic: reduce inlining cost for atomic types methods
The "&x.v" cost us 2 inline cost budget, causing extra inline cost for
the caller. By taking the fact that "v" is laid out in memory as the
first field of all atomic types, we can accessing it without addressing.

Discovering why attempting to convert sync.RWMutex.readerCount to atomic
type. RWMutex.RUnlock have the inline cost 75, with extra 7 inline cost
from Int32.Add causing it not inlinable anymore.

With this change, Int32.Add only has 5 inline cost budget, RWMutex can
use it while still be inlinable.

Change-Id: Iabe1d1bf53389b0b8b5f56b4611231b732fd9df5
Reviewed-on: https://go-review.googlesource.com/c/go/+/429766
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2022-09-09 18:21:40 +00:00
Tobias Klauser
e2f602003b internal/poll, syscall: convert writev to direct libc call on openbsd (except mips64)
Add and use a writev libc wrapper instead of using syscall(2).

Updates golang/go#36435

Change-Id: I3c67665388ac276d9ef36868e368e91efb92800e
Reviewed-on: https://go-review.googlesource.com/c/go/+/428776
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2022-09-09 16:24:04 +00:00
Tobias Klauser
600db8a514 runtime/race: also unmap memory if TestNonGoMemory fails
Change-Id: I7ea150e4896fc9b2e3a6dbdd9a1c2b651e74b844
Reviewed-on: https://go-review.googlesource.com/c/go/+/428778
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2022-09-09 15:36:26 +00:00
cui fliter
861885841d go/ast: use strings.Builder
Change-Id: I9c4c3ada3a8f5d8d198cc42a4afc06972ee00c61
GitHub-Last-Rev: 4ed80119e3
GitHub-Pull-Request: golang/go#54916
Reviewed-on: https://go-review.googlesource.com/c/go/+/428921
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2022-09-09 15:35:30 +00:00
Andy Pan
4f3246c6e9 internal/poll: drop redundant ENOSYS in CopyFileRange
Update CL 425881 and CL 428396

I browsed the source code related to copy_file_range in the kernel and found that the latest kernel may still return EXDEV errors in copy_file_range(2) due to certain cases, for details see: https://elixir.bootlin.com/linux/v5.19.7/source/fs/read_write.c#L1559, https://elixir.bootlin.com/linux/v5.19.7/source/fs/read_write.c#L1479, and
https://elixir.bootlin.com/linux/v5.19.7/source/fs/read_write.c#L1439.

Therefore, the EXDEV still needs to be kept, but the ENOSYS error can be safely removed.

Change-Id: I47026b8dd33f7ffc4de1306af6b67c7b4d2062d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/428555
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2022-09-09 15:35:09 +00:00
Andy Pan
86477e507f os: add a test case of copying a file itself via io.Copy
Change-Id: Ib9746cb4f27625cb22620271b280d2da242b2fba
Reviewed-on: https://go-review.googlesource.com/c/go/+/428437
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2022-09-09 15:34:46 +00:00
Kir Kolyshkin
bca17d16ca syscall: add CgroupFD support for ForkExec on Linux
Implement CLONE_INTO_CGROUP feature, allowing to put a child in a
specified cgroup in a clean and simple way. Note that the feature only
works for cgroup v2, and requires Linux kernel 5.7 or newer.

Using the feature requires a new syscall, clone3. Currently this is the
only reason to use clone3, but the code is structured in a way so that
other cases may be easily added in the future.

Add a test case.

While at it, try to simplify the syscall calling code in
forkAndExecInChild1, which became complicated over time because:

1. It was using either rawVforkSyscall or RawSyscall6 depending on
   whether CLONE_NEWUSER was set.

2. On Linux/s390, the first two arguments to clone(2) system call are
   swapped (which deserved a mention in Linux ABI hall of shame). It
   was worked around in rawVforkSyscall on s390, but had to be
   implemented via a switch/case when using RawSyscall6, making the code
   less clear.

Let's

 - modify rawVforkSyscall to have two arguments (which is also required
   for clone3);

 - remove the arguments workaround from s390 asm, instead implementing
   arguments swap in the caller (which still looks ugly but at least
   it's done once and is clearly documented now);

 - use rawVforkSyscall for all cases (since it is essentially similar to
   RawSyscall6, except for having less parameters, not returning r2, and
   saving/restoring the return address before/after syscall on 386 and
   amd64).

Updates #51246.

Change-Id: Ifcd418ebead9257177338ffbcccd0bdecb94474e
Reviewed-on: https://go-review.googlesource.com/c/go/+/417695
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2022-09-09 15:34:16 +00:00
Tobias Klauser
f53b2111e4 syscall: use unsafe.Slice instead of unsafeheader package
Change-Id: I9de5aafb36d05bdc90bbdba516367eb2b200a7e0
Reviewed-on: https://go-review.googlesource.com/c/go/+/428777
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2022-09-09 15:30:06 +00:00
Abirdcfly
1b196988d4 cmd/go/internal/modload: use atomic.Pointer for Requirements.graph
Change-Id: Ie543e1b1df667cfaf3aafa4be727881461ee8b7d
GitHub-Last-Rev: ed993dbe24
GitHub-Pull-Request: golang/go#54888
Reviewed-on: https://go-review.googlesource.com/c/go/+/428716
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2022-09-09 15:30:04 +00:00
Daniel Martí
9a5574afe6 go/printer: reduce allocations to improve performance
First, we know that Go source files almost always weigh at least a few
kilobytes, so we can kickstart the output buffer to be a reasonable size
and reduce the initial number of incremental allocations and copies when
appending bytes or strings to output.

Second, in nodeSize we use a nested printer, but we don't actually need
its printed bytes - we only need to know how many bytes it prints.
For that reason, use a throwaway buffer: the part of our output buffer
between length and capacity, as we haven't used it yet.

Third, use a sync.Pool to reuse allocated printers.
The current API doesn't allow reusing printers,
and some programs like gofmt will print many files in sequence.

Those changes combined result in a modest reduction in allocations and
CPU usage. The benchmark uses testdata/parser.go, which has just over
two thousand lines of code, which is pretty standard size-wise.

We also split the Print benchmark to cover both a medium-sized ast.File
as well as a pretty small ast.Decl node. The latter is a somewhat common
scenario in gopls, which has code actions which alter small bits of the
AST and print them back out to rewrite only a few lines in a file.

	name          old time/op    new time/op     delta
	PrintFile-16    5.43ms ± 1%     4.85ms ± 3%  -10.68%  (p=0.000 n=9+10)
	PrintDecl-16    19.1µs ± 0%     18.5µs ± 1%   -3.04%  (p=0.000 n=10+10)

	name          old speed      new speed       delta
	PrintFile-16  9.56MB/s ± 1%  10.69MB/s ± 3%  +11.81%  (p=0.000 n=8+10)
	PrintDecl-16  1.67MB/s ± 0%   1.73MB/s ± 1%   +3.05%  (p=0.000 n=10+10)

	name          old alloc/op   new alloc/op    delta
	PrintFile-16     332kB ± 0%      107kB ± 2%  -67.87%  (p=0.000 n=10+10)
	PrintDecl-16    3.92kB ± 0%     3.28kB ± 0%  -16.38%  (p=0.000 n=10+10)

	name          old allocs/op  new allocs/op   delta
	PrintFile-16     3.45k ± 0%      2.42k ± 0%  -29.90%  (p=0.000 n=10+10)
	PrintDecl-16      56.0 ± 0%       46.0 ± 0%  -17.86%  (p=0.000 n=10+10)

Change-Id: I475a3babca77532b2d51888f49710f74763d81d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/424924
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
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Reviewed-by: Alan Donovan <adonovan@google.com>
2022-09-09 15:10:10 +00:00
Tobias Klauser
218294f11e internal/syscall/windows: use unsafe.Slice instead of unsafeheader package
Follow CL 428777.

Change-Id: I5ce49322e92c5d6539bb08248e3366187c30dcd8
Reviewed-on: https://go-review.googlesource.com/c/go/+/428780
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2022-09-09 13:00:05 +00:00
hopehook
41089704dd all: transfer reflect.{SliceHeader, StringHeader} to unsafeheader.{Slice, String}
After we deprecated reflect.{SliceHeader, StringHeader}, it is recommended
to use unsafe.{Slice, String} to replace its work. However, the compiler
and linker cannot be migrated for the time being.

As a temporary strategy, using the "internal/unsafeheader" package like
other code is the most suitable choice at present.

For #53003.

Change-Id: I69d0ef72e2d95caabd0706bbb247a719d225c758
Reviewed-on: https://go-review.googlesource.com/c/go/+/429755
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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2022-09-09 01:59:25 +00:00
hopehook
d734203e39 reflect: deprecate SliceHeader and StringHeader
As discussed in CL 401434 there are substantial misuses of these in the
wild, and they are a potential source of unsafety even for code that
does not use them directly.

Since proposal #53003 has already been implemented, now is the right
time to deprecate reflect.{SliceHeader, StringHeader}.

For #53003.

Change-Id: I724cf46d4b22d2ed3cbf2b948e6aac5ee4bf0f6e
Reviewed-on: https://go-review.googlesource.com/c/go/+/428757
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2022-09-09 01:59:23 +00:00
Ian Lance Taylor
76c94eb706 cmd/asm/internal/asm: don't set testOut in testErrors
It's set but the output is never used.

Change-Id: I36ecb9c5f087a85289529907ede9f9bfc295d739
Reviewed-on: https://go-review.googlesource.com/c/go/+/428637
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Reviewed-by: Benny Siegert <bsiegert@gmail.com>
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2022-09-09 01:04:57 +00:00
cui fliter
3c33c3b327 strconv: remove redundant type conversion
Change-Id: I25c8e8b701d6489f360fea30d09090826276b950
GitHub-Last-Rev: c2c8319dd5
GitHub-Pull-Request: golang/go#54924
Reviewed-on: https://go-review.googlesource.com/c/go/+/428976
Auto-Submit: Ian Lance Taylor <iant@google.com>
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2022-09-09 00:28:56 +00:00
Kir Kolyshkin
3585e9be67 os: fix wrong error msg from TestDoubleCloseError
When the type assertion fails, the test mistakenly prints the expected
(rather than the actual) type.

When the error string doesn't match, the text mistakenly prints the
original (rather than the converted) error (although there might not be
any difference in the output, the code looks wrong).

Fix both issues.

Change-Id: Ia7dd0632fc677f458fec25d899c46268a12f76e7
Reviewed-on: https://go-review.googlesource.com/c/go/+/428916
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2022-09-08 21:19:00 +00:00
Tobias Klauser
d75e91740a os: use unsafe.{Slice,StringData} instead of unsafeheader package
Change-Id: I213b078effa4b7049c44498d651de5b938e5404b
Reviewed-on: https://go-review.googlesource.com/c/go/+/428779
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2022-09-08 21:18:58 +00:00
Joe Tsai
e20106ac00 time: optimize FixedZone by caching unnamed zones by the hour
FixedZone is transitively called by Time.UnmarshalJSON or Time.UnmarshalText
for any RFC 3339 timestamp that is not in UTC.
This function is relatively slow since it allocates 3 times.

Given that RFC 3339 never has a zone name and most offsets are by the hour,
we can cache unnamed zones on hour offsets.
Caching a Location should be safe since it has no exported fields or methods
that can mutate the Location. It is functionally immutable.

The only way to observe that the Location was cached is either
by pointer comparison or by shallow copying the struct value.
Neither operation seems sensible to do with a *time.Location.

Performance:

	name           old time/op  new time/op  delta
	UnmarshalText  268ns ± 2%   182ns ± 1%  -32.01%  (p=0.000 n=10+10)

Change-Id: Iab5432f34bdbb485512bb8b5464e076c03fd106f
Reviewed-on: https://go-review.googlesource.com/c/go/+/425116
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2022-09-08 21:18:53 +00:00
hopehook
a9a398220f all: use unsafe.{Slice, SliceData, String, StringData} to simplify code
Because most of these APIs are recently supported, we can only do some
advancement work as much as possible under the premise of compatibility.

For #54854.

Change-Id: Id15d11288bf23902570d54eaf2704a5264210b2e
Reviewed-on: https://go-review.googlesource.com/c/go/+/429115
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2022-09-08 21:16:39 +00:00
Michael Anthony Knyszek
51c34e2f0b runtime: remove unused scanSize parameter to gcmarknewobject
This was left over from the old pacer, and never removed when the old
pacer was removed in Go 1.19.

Change-Id: I79e5f0420c6100c66bd06129a68f5bbab7c1ea8f
Reviewed-on: https://go-review.googlesource.com/c/go/+/429256
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2022-09-08 16:06:04 +00:00
Michael Anthony Knyszek
2caaad942e runtime: use searchIdx in scavengeOne
This is an optimization that prevents N^2 behavior within a chunk, but
was accidentally skipped. There should be no functional change as a
result of this CL.

Fixes #54892.

Change-Id: I861967a2268699fdc3464bd41bc56618b5628e6b
Reviewed-on: https://go-review.googlesource.com/c/go/+/429255
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2022-09-08 16:06:03 +00:00
Michael Anthony Knyszek
5a37965495 runtime: make mheap.pagesInUse an atomic.Uintptr
This change fixes an old TODO that made it a uint64 because it would
make alignment within mheap more complicated. Now that we don't have to
worry about it since we're using atomic types as much as possible,
switch to using a Uintptr. This likely will improve performance a tiny
bit on 32-bit platforms, but really it's mostly cleanup.

Change-Id: Ie705799a111ccad977fc1f43de8b50cf611be303
Reviewed-on: https://go-review.googlesource.com/c/go/+/429221
Reviewed-by: Keith Randall <khr@golang.org>
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2022-09-08 16:06:01 +00:00
Michael Anthony Knyszek
e28cc362a8 runtime: remove alignment padding in mheap and pageAlloc
All subfields use atomic types to ensure alignment, so there's no more
need for these fields.

Change-Id: Iada4253f352a074073ce603f1f6b07cbd5b7c58a
Reviewed-on: https://go-review.googlesource.com/c/go/+/429220
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2022-09-08 16:06:00 +00:00
Michael Anthony Knyszek
1c59199c91 runtime: remove atomic store requirement on pageAlloc.chunks
pageAlloc.chunks used to require an atomic store when growing the heap
because the scavenger would look at the list without locking the heap
lock. However, the scavenger doesn't do that anymore, and it looks like
nothing really does at all.

This change updates the comment and makes the store non-atomic.

Change-Id: Ib452d147861060f9f6e74e2d98ee111cf89ce8f5
Reviewed-on: https://go-review.googlesource.com/c/go/+/429219
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2022-09-08 16:05:56 +00:00
Robert Griesemer
cd8aa40149 go/types, types2: implement slice-to-array conversions
For #46505.

Change-Id: I9bc9da5dd4b76cb2d8ff41390e1567678e72d88d
Reviewed-on: https://go-review.googlesource.com/c/go/+/428938
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2022-09-08 15:55:44 +00:00
cuiweixie
0e50bf0e40 database: convert Tx.done to atomic type
Change-Id: I9ec725009376f5865adedca6c159b14140dde097
Reviewed-on: https://go-review.googlesource.com/c/go/+/426086
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2022-09-08 15:52:57 +00:00
Michael Anthony Knyszek
d61ffe8b6c runtime: use atomic types in mspanset.go for alignment and type safety
Right now, span sets use a lot of unsafe.Pointer and naked atomics
operations. This change modifies it to use atomic types everywhere and
wraps any atomic.UnsafePointer in a type to improve type safety.

This change should functionally be a no-op.

Change-Id: I32e6c460faaf6ec41ab1163158f6da7938eef3de
Reviewed-on: https://go-review.googlesource.com/c/go/+/429218
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2022-09-08 15:48:37 +00:00
Lynn Boger
403f91c244 cmd/compile/internal: merge rules in PPC64.rules
This uses rulegen syntax which allows similar rules
to be combined, saving lines in the rules file.
The Lsh16x32 rule had an incorrect value and that was
fixed.

Change-Id: I637410e39d8554825076aca5ac24083ce05ab186
Reviewed-on: https://go-review.googlesource.com/c/go/+/429035
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2022-09-08 14:58:11 +00:00
cuiweixie
530a236974 runtime/pprof: use strings.Builder
Change-Id: I0407d96e2ba1376cc33fe91b52b6a8d7e81f59ae
Reviewed-on: https://go-review.googlesource.com/c/go/+/428277
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2022-09-08 14:57:47 +00:00
cuiweixie
e5ed2212a3 cmd/trace: use strings.Builder
Change-Id: I690dc517c08be4cd66439baad8b91f16622ff0d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/428292
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2022-09-08 14:33:45 +00:00
cuiweixie
c263fa07b1 cmd/pack: use strings.Builder
Change-Id: I1c9f91e983fb26b3e46c65513a4f14508774e543
Reviewed-on: https://go-review.googlesource.com/c/go/+/428291
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2022-09-08 14:33:43 +00:00
cuiweixie
ab0d057e64 cmd/link: use strings.Builder
Change-Id: I5780c3f26302fd5cf21e4a1f0bc1777abb658c82
Reviewed-on: https://go-review.googlesource.com/c/go/+/428290
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2022-09-08 14:33:41 +00:00
cuiweixie
9c147cc617 cmd/fix: use strings.Builder
Change-Id: I761766e147202970f82ce804dbaf5d491508995c
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2022-09-08 14:33:39 +00:00
cuiweixie
866fbb67d0 cmd/dist: use strings.Builder
Change-Id: I56bd5d6b1333a96339340e5af5e6470cc7fb11a2
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2022-09-08 14:33:38 +00:00
cuiweixie
47faad111f cmd/cover: use strings.Builder
Change-Id: Ifb51cb4ed98a93742ce4b221137a0ad73b939b06
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2022-09-08 14:33:36 +00:00
cuiweixie
33628ce195 cmd/cgo: use strings.Builder
Change-Id: I427776e5b2d9c7279932548c86c8faded0eed041
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2022-09-08 14:33:35 +00:00