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Commit Graph

57523 Commits

Author SHA1 Message Date
Damien Neil
a915b999c9 crypto/tls: change SendSessionTicket to take an options struct
To allow for future evolution of the API, make
QUICConn.SendSessionTicket take a QUICSessionTicketOptions
rather than a single bool.

For #60107

Change-Id: I798fd0feec5c7581e3c3574e2de99611c81df47f
Reviewed-on: https://go-review.googlesource.com/c/go/+/514997
Reviewed-by: Roland Shoemaker <roland@golang.org>
Run-TryBot: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Marten Seemann <martenseemann@gmail.com>
2023-08-02 17:14:49 +00:00
qmuntal
a09ea59198 runtime: cpu profiler to use high resolution timers on Windows
The CPU profiler skip samples if the sampling rate is too high
for the system timer resolution. This CL uses high resolution
timers on Windows when available, to avoid this problem.

Note that the default sampling rate (100Hz) is already too high
for the Windows timer resolution (15.6ms), so this CL also improves
the default Windows sampling coverage.

Not adding regression tests, as they would be too flaky.

Fixes #61665

Change-Id: Ifdadabc9ebaf56f397eac517bd0e5f1502b956b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/514375
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: David Chase <drchase@google.com>
2023-08-02 15:25:43 +00:00
qiulaidongfeng
54e9d6d5ef reflect: update Type.FieldByName documentation
Fixes #61495

Change-Id: I9abaf3613c797006b803dcb1dbee16f25ffb7516

Change-Id: I9abaf3613c797006b803dcb1dbee16f25ffb7516
GitHub-Last-Rev: 7bc2cba772
GitHub-Pull-Request: golang/go#61645
Reviewed-on: https://go-review.googlesource.com/c/go/+/514035
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
2023-08-02 15:25:06 +00:00
Jes Cok
0f1491ded5 encoding/json: adjust comment to keep the same style as comment above
Change-Id: Id47d32d18031883b874bba4cf8541f75c5d7f9db
GitHub-Last-Rev: 98c671c00c
GitHub-Pull-Request: golang/go#61711
Reviewed-on: https://go-review.googlesource.com/c/go/+/515215
Reviewed-by: Russ Cox <rsc@golang.org>
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Reviewed-by: David Chase <drchase@google.com>
2023-08-02 15:24:34 +00:00
Mauri de Souza Meneguzzo
76b8e80fab cmd/go: missing name in failed command error
Fixed the error reporting for an unknown command to
preserve the name when displaying the error message.

Fixes #61604

Change-Id: I13defb84e61265ab48ab514e9d4f1626a4a3f758
GitHub-Last-Rev: 5d2889c60c
GitHub-Pull-Request: golang/go#61607
Reviewed-on: https://go-review.googlesource.com/c/go/+/513555
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: David Chase <drchase@google.com>
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Reviewed-by: Russ Cox <rsc@golang.org>
2023-08-02 15:10:16 +00:00
Roland Shoemaker
2350afd2e8 crypto/tls: restrict RSA keys in certificates to <= 8192 bits
Extremely large RSA keys in certificate chains can cause a client/server
to expend significant CPU time verifying signatures. Limit this by
restricting the size of RSA keys transmitted during handshakes to <=
8192 bits.

Based on a survey of publicly trusted RSA keys, there are currently only
three certificates in circulation with keys larger than this, and all
three appear to be test certificates that are not actively deployed. It
is possible there are larger keys in use in private PKIs, but we target
the web PKI, so causing breakage here in the interests of increasing the
default safety of users of crypto/tls seems reasonable.

Thanks to Mateusz Poliwczak for reporting this issue.

Fixes #61460
Fixes CVE-2023-29409

Change-Id: Ie35038515a649199a36a12fc2c5df3af855dca6c
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1912161
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Tatiana Bradley <tatianabradley@google.com>
Run-TryBot: Roland Shoemaker <bracewell@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/515257
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Auto-Submit: David Chase <drchase@google.com>
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2023-08-02 14:34:55 +00:00
Dmitri Shuralyov
fb6f38dda1 cmd/distpack: test for .DS_Store files in all directories
macOS may write a .DS_Store file to any directory at any time in
the general case, unfortunately. Expand test rules to catch them
no matter where they may appear.

For #24904.

Change-Id: I98a2bb5d0ae2ab3a191ff87b33d6f8048ca39aa8
Reviewed-on: https://go-review.googlesource.com/c/go/+/514898
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
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2023-08-01 22:29:19 +00:00
Dmitri Shuralyov
f719de0798 cmd/dist: tolerate macOS writing .DS_Store to GOROOT/bin
I was trying out gorebuild (a program that runs make.bash many times)
on a macOS system. Unfortunately there were a few failed invocations
on my first try, but not with a very good or interesting reason:

go tool dist: unexpected new file in $GOROOT/bin: .DS_Store

Tolerate it since it's not unexpected, and will not affect the build.

Change-Id: I656536b896098c2ba934667196d4ce82e706c8da
Reviewed-on: https://go-review.googlesource.com/c/go/+/513763
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
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2023-08-01 22:28:15 +00:00
Jes Cok
f32e0c30e4 encoding/json: replace "between or" with "between and" in comment
Change-Id: Id19a15f9367de10e08a9ec22a8cb50c58d517906
GitHub-Last-Rev: f413d71c9a
GitHub-Pull-Request: golang/go#61701
Reviewed-on: https://go-review.googlesource.com/c/go/+/514976
Reviewed-by: Russ Cox <rsc@golang.org>
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2023-08-01 20:51:54 +00:00
Keith Randall
319504ce43 cmd/compile: implement float min/max in hardware for amd64 and arm64
Update #59488

Change-Id: I89f5ea494cbcc887f6fae8560e57bcbd8749be86
Reviewed-on: https://go-review.googlesource.com/c/go/+/514596
Reviewed-by: Keith Randall <khr@google.com>
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2023-08-01 20:03:31 +00:00
Keith Randall
ca36301228 reflect: make linkable cross-references in documentation
This makes it easier to click around in documentation on pkg.go.dev.

Change-Id: Idc67c312bc72c612e660607e5400b43ecc110bc1
Reviewed-on: https://go-review.googlesource.com/c/go/+/514895
Run-TryBot: Keith Randall <khr@golang.org>
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2023-08-01 19:57:16 +00:00
root
6fe976545d runtime: handle SIGPE exception for p256 crypto package on s390x
Older s390x before z13 did not have support to carry out floating point operations i.e. they didn't have the support for vector instructions like VX/VL, etc.

Starting with Go1.19, z13 is the minimum hardware level for running Go on LoZ (s390x). The main cause of this issue was the refactoring of elliptic curve to internal/nistec. The new code structures made it difficult to dynamically switch implementations at runtime, so it became necessary (in order machines to continue to use the accelerated implementation) to require z13 as the minimum hardware.

Hence, Go programs, when run on unsupported hardware, should crash on startup instead of crashing out in crypto code.

Fixes: #58465

Change-Id: I7c1a816205d19b5ddd2f1464839d16fa96815384
Reviewed-on: https://go-review.googlesource.com/c/go/+/499495
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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2023-08-01 17:36:28 +00:00
Rob Findley
b6898dde3d go/types, types2: instantiated interfaces must be concurrency safe
It is the responsibility of go/types to complete any interface it
creates, except for those created by the user using NewInterface.
However, this was not being done for interfaces created during
instantiation.

Fix this by (rather carefully) ensuring that all newly created
interfaces are eventually completed.

Fixes golang/go#61561

Change-Id: I3926e7c9cf80714838d2c1b5f36a2d3221c60c41
Reviewed-on: https://go-review.googlesource.com/c/go/+/513015
Run-TryBot: Robert Findley <rfindley@google.com>
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Reviewed-by: Robert Griesemer <gri@google.com>
2023-08-01 17:16:43 +00:00
Robert Griesemer
8597d052b2 go/types, types2: remove internal constant enableInterfaceInference
We're not going to disable this functionality as it would
invalidate code that now type-checks with type inference
based on this mechanism.

Change-Id: Ib11059e2f70a5a209693b06f754cba862e3650ec
Reviewed-on: https://go-review.googlesource.com/c/go/+/514715
Auto-Submit: Robert Griesemer <gri@google.com>
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Reviewed-by: Robert Findley <rfindley@google.com>
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2023-08-01 16:43:44 +00:00
Junxian Zhu
68a32ced0f cmd/compile/internal/mips: use hardware NOP instruction as NOOP on mips platform
This CL uses mips hardware NOP instruction as NOOP on mips platform, instead of pseudo NOP "nor $zero,$zero,$zero".

Change-Id: I336e1ba4228b71e6bfc6be66b367a4327fb3b36e
Reviewed-on: https://go-review.googlesource.com/c/go/+/509015
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Joel Sing <joel@sing.id.au>
Run-TryBot: Joel Sing <joel@sing.id.au>
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2023-08-01 14:53:45 +00:00
Ian Lance Taylor
64c2072a94 text/template, html/template: use reflect.TypeFor for known types
For #60088

Change-Id: Ibc3983ca5cfe396087ddfa96c43cfe32ca47129a
Reviewed-on: https://go-review.googlesource.com/c/go/+/514640
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
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2023-08-01 14:30:25 +00:00
Ian Lance Taylor
56d3e84bb0 encoding/json: use reflect.TypeFor for known types
For #60088

Change-Id: I2e471c76de62944b14472966b63f5778124b9b8b
Reviewed-on: https://go-review.googlesource.com/c/go/+/514655
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Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
2023-08-01 14:30:02 +00:00
Ian Lance Taylor
db25bc19e5 encoding/xml: use reflect.TypeFor for known types
For #60088

Change-Id: Ib2589b994d304cca1f2e2081639959d80818ac7f
Reviewed-on: https://go-review.googlesource.com/c/go/+/514639
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2023-08-01 14:29:37 +00:00
apocelipes
29253f4d51 os/exec: Use the built-in function min instead of minInt
The built-in function `min` has been implemented and can now be used to replace some manually written `minType` helper functions.

Change-Id: Ie8ffc7881c8652ece752751214f1242bf76a6e7e
GitHub-Last-Rev: 5db344f131
GitHub-Pull-Request: golang/go#60866
Reviewed-on: https://go-review.googlesource.com/c/go/+/504315
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2023-08-01 14:29:09 +00:00
Jes Cok
840ec052f6 archive/tar: narrow trim range for formatter'formatString
Trim s[:len(b)-1] rather than s[:len(b)], since s[len(b)-1] is '/'.

Change-Id: I055da555810c112774549bd13d4faa8bfa0a60dc
GitHub-Last-Rev: 457977514d
GitHub-Pull-Request: golang/go#60729
Reviewed-on: https://go-review.googlesource.com/c/go/+/502376
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2023-08-01 14:28:42 +00:00
Ian Lance Taylor
d4b46b0956 encoding/gob: use reflect.TypeFor for known types
This avoids several mildly confusing Elem calls.

For #60088

Change-Id: If7b83d2ab10537c7e886a035b43cb272130c1669
Reviewed-on: https://go-review.googlesource.com/c/go/+/514455
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2023-08-01 14:26:13 +00:00
qmuntal
9138743679 time: mention time resolution in docs
Updates #44343
Updates #53824

Change-Id: Ia7234fac4b1b88b3c331328aaa98dc85205e09ba
Reviewed-on: https://go-review.googlesource.com/c/go/+/514275
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2023-08-01 13:51:01 +00:00
Ian Lance Taylor
be0e0b06ac sync: panic rather than throw on nil *Pool
Fixes #61651

Change-Id: I27d581719e6bf38910f9d47dcf023bbff74ddf72
Reviewed-on: https://go-review.googlesource.com/c/go/+/514037
Reviewed-by: Rob Pike <r@golang.org>
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2023-07-31 22:18:47 +00:00
Eduard Bondarenko
a2905e95a0 net/http: fix doc comment on FormValue function
This function checks Request.Form, which now includes values parsed from a PATCH request.

Fixes #60585

Change-Id: Icb095d9ac2f8b0c5dbf313e507ed838cb941517f
GitHub-Last-Rev: 3a477ea97e
GitHub-Pull-Request: golang/go#61591
Reviewed-on: https://go-review.googlesource.com/c/go/+/513435
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
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2023-07-31 20:21:57 +00:00
Mauri de Souza Meneguzzo
ee61186b33 regexp/syntax: accept (?<name>...) syntax as valid capture
Currently the only named capture supported by regexp is (?P<name>a).

The syntax (?<name>a) is also widely used and there is currently an effort from
 the Rust regex and RE2 teams to also accept this syntax.

Fixes #58458

Change-Id: If22d44d3a5c4e8133ec68238ab130c151ca7c5c5
GitHub-Last-Rev: 31b50e6ab4
GitHub-Pull-Request: golang/go#61624
Reviewed-on: https://go-review.googlesource.com/c/go/+/513838
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2023-07-31 19:52:57 +00:00
Russ Cox
977e23a707 doc/go_mem: explain arrays, structs, and complex numbers
Arrays, structs, and complex numbers are collections of values that
are handled separately by the memory model.

An earlier version may have said this, but the current version does not.
Say it.

Change-Id: If3928bed6659e58e688f88aa0dde05423cbb3820
Reviewed-on: https://go-review.googlesource.com/c/go/+/514476
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2023-07-31 19:10:40 +00:00
Jes Cok
26fc4aa956 errors: optimize *joinError's Error method for less allocation and faster execution
Handle the case of one error at the beginning.
Use unsafe.String to avoid memory allocation when converting byte slice to string.

Change-Id: Ib23576f72b1d87489e6f17762be483f62ca4998a
GitHub-Last-Rev: ed8003bfbc
GitHub-Pull-Request: golang/go#60026
Reviewed-on: https://go-review.googlesource.com/c/go/+/493237
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2023-07-31 18:37:32 +00:00
Alexander Yastrebov
17d67ed0c9 debug/buildinfo: read full data segment to lookup buildinfo magic
Fixes #61644

Change-Id: I7d40c33e65221994bb6865d22dd0994545603ba8
GitHub-Last-Rev: aca92afcbd
GitHub-Pull-Request: golang/go#61649
Reviewed-on: https://go-review.googlesource.com/c/go/+/514075
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2023-07-31 18:36:20 +00:00
korzhao
1eaeec1095 encoding/json: optimize Unmarshal for maps
benchmark                    old ns/op     new ns/op     delta
BenchmarkUnmarshalMap-10     218           172           -21.28%

benchmark                    old allocs     new allocs     delta
BenchmarkUnmarshalMap-10     15             12             -20.00%

benchmark                    old bytes     new bytes     delta
BenchmarkUnmarshalMap-10     328           256           -21.95%

Change-Id: Ie20ab62731c752eb0040c6d1591fedd7d12b1e0c
Reviewed-on: https://go-review.googlesource.com/c/go/+/514100
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2023-07-31 18:34:45 +00:00
Jorropo
bac4e2f241 cmd/compile: try to rewrite loops to count down
Fixes #61629

This reduce the pressure on regalloc because then the loop only keep alive
one value (the iterator) instead of the iterator and the upper bound since
the comparison now acts against an immediate, often zero which can be skipped.

This optimize things like:
  for i := 0; i < n; i++ {
Or a range over a slice where the index is not used:
  for _, v := range someSlice {
Or the new range over int from #61405:
  for range n {

It is hit in 975 unique places while doing ./make.bash.

Change-Id: I5facff8b267a0b60ea3c1b9a58c4d74cdb38f03f
Reviewed-on: https://go-review.googlesource.com/c/go/+/512935
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2023-07-31 18:33:29 +00:00
Sean Liao
8613ef81e6 .github: fix templates with multiple labels
Also Go2 -> v2

Change-Id: Icde8ffc4a1ee2e43241a3dcd00ff0c48992b1e25
Reviewed-on: https://go-review.googlesource.com/c/go/+/514175
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
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2023-07-31 18:28:27 +00:00
Tolya Korniltsev
734de5e526 debug/elf: don't use reflection in File.Symbols
cpu: AMD Ryzen 9 5950X 16-Core Processor
             |   old.txt    |               new.txt                |
             |    sec/op    |    sec/op     vs base                |
Symbols64-32   18.486µ ± 2%   4.509µ ± 24%  -75.61% (p=0.000 n=10)
Symbols32-32   17.823µ ± 3%   4.798µ ±  2%  -73.08% (p=0.000 n=10)
geomean         18.15µ        4.651µ        -74.38%

             |    old.txt    |               new.txt                |
             |     B/op      |     B/op      vs base                |
Symbols64-32   10.680Ki ± 0%   8.922Ki ± 0%  -16.46% (p=0.000 n=10)
Symbols32-32    9.773Ki ± 0%   8.570Ki ± 0%  -12.31% (p=0.000 n=10)
geomean         10.22Ki        8.744Ki       -14.41%

             |   old.txt   |              new.txt               |
             |  allocs/op  | allocs/op   vs base                |
Symbols64-32   119.00 ± 0%   45.00 ± 0%  -62.18% (p=0.000 n=10)
Symbols32-32   125.00 ± 0%   50.00 ± 0%  -60.00% (p=0.000 n=10)
geomean         122.0        47.43       -61.11%

Fixes #61534

Change-Id: I13a96467108771df31f018853df754e42100e773
Reviewed-on: https://go-review.googlesource.com/c/go/+/512395
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Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
2023-07-31 18:12:47 +00:00
Mauri de Souza Meneguzzo
845fff35c6 archive/zip: add AddFS method to zip Writer
The method AddFS can be used to add the contents of a fs.FS filesystem
to a zip archive.
This method walks the directory tree starting at the root of the filesystem
and adds each file to the archive.

Fixes #54898

Change-Id: I80511cbd91a1d7e09ee52d2d1b09fb5eed25f45f
GitHub-Last-Rev: 1e17f2e6ba
GitHub-Pull-Request: golang/go#61602
Reviewed-on: https://go-review.googlesource.com/c/go/+/513438
Reviewed-by: David Chase <drchase@google.com>
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Run-TryBot: Ian Lance Taylor <iant@google.com>
2023-07-31 18:10:41 +00:00
Joel Sing
789980ec0e cmd/internal/obj/mips: use more appropriate register types for OP_FRRR/OP_SRR
Rather than passing registers as uint32, use int16 and cast to uint32 in
the OP_FRRR/OP_SRR implementation. This allows a large number of casts to be
removed and code simplified at call sites.

Change-Id: Ia4bf3bd022f79d65e45fca64db13db12739e5b23
Reviewed-on: https://go-review.googlesource.com/c/go/+/514099
Run-TryBot: Joel Sing <joel@sing.id.au>
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2023-07-31 18:05:11 +00:00
Joel Sing
48f431ee3c cmd/internal/obj/mips: use more appropriate register types for OP_IRR
Rather than passing registers as uint32, use int16 and cast to uint32 in
the OP_IRR implementation. This allows a large number of casts to be removed
and code simplified at call sites. Also be more consistent with op, register
and value ordering.

Change-Id: I510347d97787ce80a338037b25470addf3a2939d
Reviewed-on: https://go-review.googlesource.com/c/go/+/514098
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2023-07-31 18:05:08 +00:00
Joel Sing
f6966577a2 cmd/internal/obj/mips: use more appropriate register types for OP_RRR
Rather than passing registers as uint32, use int16 and cast to uint32 in
the OP_RRR implementation. This allows a large number of casts to be removed
and code simplified at call sites.

Change-Id: I2194ea07a6f89861530cd88c4b60c993bb0fa0c1
Reviewed-on: https://go-review.googlesource.com/c/go/+/514097
Auto-Submit: Ian Lance Taylor <iant@golang.org>
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Run-TryBot: Joel Sing <joel@sing.id.au>
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2023-07-31 18:04:35 +00:00
Joel Sing
24af43fa66 cmd/internal/obj/mips: use obj.REG_NONE rather than 0
Instead of comparing register values to 0, use obj.REG_NONE to improve
readability. No functional change.

Change-Id: I848f7ab7e27fe7e5e9fe2caf9cce47e372c6cd6c
Reviewed-on: https://go-review.googlesource.com/c/go/+/514096
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Reviewed-by: Rong Zhang <rongrong@oss.cipunited.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Junxian Zhu <zhujunxian@oss.cipunited.com>
2023-07-31 18:04:32 +00:00
Russ Cox
8a83ef8479 cmd/go: make go list -m -u all not complain about missing checksums
This is a band-aid of a fix for Go 1.21, to create space to work on
a real fix for Go 1.22, if in fact the real fix is different. It simply
disables the go.sum update check during go list -m -u.
I don't have a self-contained test for the breakage. See #61605.
All existing tests continue to pass.

For #61605.
After merging into the Go 1.21 branch we can move #61605 to the Go 1.22 milestone.

Change-Id: Ib155710092003f08d2a6ce0aefa8e0270cad5a5c
Reviewed-on: https://go-review.googlesource.com/c/go/+/513778
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2023-07-31 17:52:48 +00:00
Cherry Mui
e417698e84 cmd/link: fix up more zero-sized local symbols on darwin dynamic linking
When dynamic linking on darwin, the darwin linker doesn't link
relocations pointing to zero-sized local symbols, like our
start/end marker symbols, e.g. runtime.text and runtime.etext.
It will choose to resolve to another symbol on the same address
that may not be local, therefore that reference may point to a
different DSO, which is not what we want. We already fix up some
marker symbols, like text/etext, data/edata, bss/ebss. But we
currently don't fix up noptrdata and noptrbss. With the new
darwin linker ld-prime, this causes problems when building a
plugin. Fix up those symbols.

For #61229.

Change-Id: I2181bb9184b85af9a3c3f5dc6d78e4d5a1d56d53
Reviewed-on: https://go-review.googlesource.com/c/go/+/503538
Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
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2023-07-31 17:37:16 +00:00
Hiro
463887d5cc go/types: add test cases for generic constraints, types and functions
Dups: #60856
For #60817

Change-Id: Ic0710758e170d6ceed66649fec08ef8054be4d6b
GitHub-Last-Rev: 8bbc76aaa7
GitHub-Pull-Request: golang/go#61664
Reviewed-on: https://go-review.googlesource.com/c/go/+/514255
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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2023-07-31 17:08:18 +00:00
Cherry Mui
be910bf2fd cmd/link: always use symbol-targeted relocations on Mach-O
In Mach-O object files, there are two kinds of relocations:
"external" relocation, which targets a symbol, and "non-external"
relocation, which targets a section. For targeting symbols not in
the current object, we must use symbol-targeted relocations. For
targeting symbols defined in the current object, for some
relocation types, both kinds can be used. We currently use
section-targeted relocations for R_ADDR targeting locally defined
symbols.

Modern Apple toolchain seems to prefer symbol-targeted relocations.
Also, Apple's new linker, ld-prime, seems to not handle section-
targeted relocations well in some cases. So this CL switches to
always generate symbol-targeted relocations. This also simplifies
the code.

One exception is that DWARF tools seem to handle only section-
targeted relocations. So generate those in DWARF sections.

This CL supersedes CL 502616.

Fixes #60694.
For #61229.

Change-Id: I3b74df64f21114635061bcd89114392b3a2d588b
Reviewed-on: https://go-review.googlesource.com/c/go/+/503935
Reviewed-by: Than McIntosh <thanm@google.com>
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2023-07-31 17:02:24 +00:00
Cherry Mui
bad9ca8a61 cmd/link: use symbol-targeted relocation for initializers on Mach-O
Apple's new linker, ld-prime from Xcode 15 beta, when handling
initializers in __mod_init_func, drops the offset in the data,
resolving the relocation to the beginning of the section. The
latest version of ld-prime rejects non-zero addend. We need to use
symbol-targeted "external" relocations, so that it doesn't need
an addend and can be resolved correctly. This also works fine with
ld64.

Fixes #60694.
For #61229.

Change-Id: Ida2be6aa4c91bfcd142b755e2ec63aabfbbd77a6
Reviewed-on: https://go-review.googlesource.com/c/go/+/502616
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Reviewed-by: Than McIntosh <thanm@google.com>
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2023-07-31 17:01:57 +00:00
Matthew Dempsky
9eb1d5317b runtime: refactor defer processing
This CL refactors gopanic, Goexit, and deferreturn to share a common
state machine for processing pending defers. The new state machine
removes a lot of redundant code and does overall less work.

It should also make it easier to implement further optimizations
(e.g., TODOs added in this CL).

Change-Id: I71d3cc8878a6f951d8633505424a191536c8e6b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/513837
Reviewed-by: Keith Randall <khr@golang.org>
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2023-07-31 16:52:06 +00:00
Joel Sing
6eaad824e5 cmd/internal/obj/arm64: improve splitting of 24 bit unsigned scaled immediates
The previous implementation would limit itself to 0xfff000 | 0xfff << shift,
while the maximum possible value is 0xfff000 + 0xfff << shift. In practical
terms, this means that an additional ((1 << shift) - 1) * 0x1000 of offset
is reachable for operations that use this splitting format. In the case of
an 8 byte load/store, this is an additional 0x7000 that can be reached
without needing to use the literal pool.

Updates #59615

Change-Id: Ice7023104042d31c115eafb9398c2b999bdd6583
Reviewed-on: https://go-review.googlesource.com/c/go/+/512540
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2023-07-31 16:39:36 +00:00
Robert Griesemer
03bec7dc6f spec: add Appendix with detailed type unification rules
Change-Id: I0d4ccbc396c48d565c0cbe93c9558ab330a44d02
Reviewed-on: https://go-review.googlesource.com/c/go/+/513275
Auto-Submit: Robert Griesemer <gri@google.com>
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2023-07-31 16:39:02 +00:00
Joel Sing
208fc13245 cmd/internal/obj/arm64: avoid unnecessary literal pool usage for moves
In a number of load and store cases, the use of the literal pool can be
entirely avoided by simply adding or subtracting the offset from the
register. This uses the same number of instructions, while avoiding a
load from memory, along with the need for the value to be in the literal
pool. Overall this reduces the size of binaries slightly and should have
lower overhead.

Updates #59615

Change-Id: I9cb6a403dc71e34a46af913f5db87dbf52f8688c
Reviewed-on: https://go-review.googlesource.com/c/go/+/512539
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2023-07-31 16:38:47 +00:00
Joel Sing
3313b39bae cmd/internal/obj/arm64: improve classification of loads and stores
Currently, pool literals are added when they are not needed, namely
in the case where the offset is a 24 bit unsigned scaled immediate.
By improving the classification of loads and stores, we can avoid
generating unused pool literals. However, more importantly this
provides a basis for further improvement of the load and store
code generation.

Updates #59615

Change-Id: Ia3bad1709314565a05894a76c434cca2fa4533c4
Reviewed-on: https://go-review.googlesource.com/c/go/+/512538
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2023-07-31 16:37:49 +00:00
Srinivas Pokala
a37da52d75 math: enable huge argument tests on s390x
new s390x assembly implementation of Sin/Cos/SinCos/Tan handle huge argument
test's.

Updates #29240

Change-Id: I9f22d9714528ef2af52c749079f3727250089baf
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2023-07-31 16:23:41 +00:00
Carl Johnson
42d2dfb430 reflect: add TypeFor
Fixes #60088

Change-Id: I7b43d329def22c2524501ba1d6bfc73becc823d1
GitHub-Last-Rev: becd714c45
GitHub-Pull-Request: golang/go#61598
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2023-07-31 15:50:15 +00:00
korzhao
f024e390bb reflect: optimize DeepEqual() for maps
benchmark                     old ns/op     new ns/op     delta
BenchmarkMapsDeepEqual-10     235           200           -15.05%

benchmark                     old allocs     new allocs     delta
BenchmarkMapsDeepEqual-10     7              6              -14.29%

benchmark                     old bytes     new bytes     delta
BenchmarkMapsDeepEqual-10     96            48            -50.00%

Change-Id: Ifa625ad25524cc9ee438711917606626b33a9597
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2023-07-31 15:44:01 +00:00