Add support for WSBH/DSBH/DSHD instructions, which are introduced in mips{32,64}r2.
WSBH reverse bytes within halfwords for 32-bit word, DSBH reverse bytes within halfwords for 64-bit doubleword, and DSHD reverse halfwords within doublewords. These instructions can be used to optimize byte swaps.
Ref: The MIPS64 Instruction Set, Revision 5.04: https://s3-eu-west-1.amazonaws.com/downloads-mips/documents/MD00087-2B-MIPS64BIS-AFP-05.04.pdf
Updates #60072
Change-Id: I31c043150fe8ac03027f413ef4cb2f3e435775e1
Reviewed-on: https://go-review.googlesource.com/c/go/+/493816
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Joel Sing <joel@sing.id.au> Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
Matthew Dempsky [Wed, 26 Jul 2023 17:40:12 +0000 (10:40 -0700)]
doc/go1.21: finish last TODO for go/types.Package.GoVersion
Updates #58645.
Change-Id: I7352bf7f03c478d92ebd0b8345d676d5b2dfccb7
Reviewed-on: https://go-review.googlesource.com/c/go/+/513475
Auto-Submit: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Robert Griesemer [Tue, 1 Aug 2023 22:48:17 +0000 (15:48 -0700)]
go/types, types2: move posVers field into group of package-specific fields (cleanup)
posVers exists once for an entire package. Move it into the group
of fields related to the entire package (and out from the group
of fields that are specific to each batch of files).
Change-Id: I40ea722578408bdf2b85db91b65680e720c0c502
Reviewed-on: https://go-review.googlesource.com/c/go/+/514998
Auto-Submit: Robert Griesemer <gri@google.com>
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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
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Change-Id: I9abaf3613c797006b803dcb1dbee16f25ffb7516
GitHub-Last-Rev: 7bc2cba77286be1bd322ee31eee3e1df3d8761f1
GitHub-Pull-Request: golang/go#61645
Reviewed-on: https://go-review.googlesource.com/c/go/+/514035
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Roland Shoemaker [Wed, 7 Jun 2023 22:27:13 +0000 (15:27 -0700)]
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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Dmitri Shuralyov [Tue, 1 Aug 2023 17:43:08 +0000 (13:43 -0400)]
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>
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Dmitri Shuralyov [Sat, 29 Jul 2023 20:33:13 +0000 (16:33 -0400)]
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>
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Keith Randall [Tue, 1 Aug 2023 17:03:40 +0000 (10:03 -0700)]
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
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root [Wed, 31 May 2023 12:06:02 +0000 (12:06 +0000)]
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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Rob Findley [Tue, 25 Jul 2023 15:57:37 +0000 (11:57 -0400)]
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
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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>
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Ian Lance Taylor [Mon, 31 Jul 2023 22:24:18 +0000 (15:24 -0700)]
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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Ian Lance Taylor [Mon, 31 Jul 2023 22:18:12 +0000 (15:18 -0700)]
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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Ian Lance Taylor [Mon, 31 Jul 2023 22:20:54 +0000 (15:20 -0700)]
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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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: 5db344f13142c78f437571e3a1cdc0b02c0589cb
GitHub-Pull-Request: golang/go#60866
Reviewed-on: https://go-review.googlesource.com/c/go/+/504315
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Jes Cok [Mon, 12 Jun 2023 12:09:44 +0000 (12:09 +0000)]
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: 457977514d75a6c72086c2f4d89fb601280b8b90
GitHub-Pull-Request: golang/go#60729
Reviewed-on: https://go-review.googlesource.com/c/go/+/502376
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Ian Lance Taylor [Mon, 31 Jul 2023 17:30:27 +0000 (10:30 -0700)]
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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Ian Lance Taylor [Sat, 29 Jul 2023 15:59:20 +0000 (08:59 -0700)]
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> Reviewed-by: Austin Clements <austin@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
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Mauri de Souza Meneguzzo [Sat, 29 Jul 2023 20:26:00 +0000 (20:26 +0000)]
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: 31b50e6ab40cfb0f36df6f570525657d4680017f
GitHub-Pull-Request: golang/go#61624
Reviewed-on: https://go-review.googlesource.com/c/go/+/513838
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Alexander Yastrebov [Sat, 29 Jul 2023 17:00:35 +0000 (17:00 +0000)]
debug/buildinfo: read full data segment to lookup buildinfo magic
Fixes #61644
Change-Id: I7d40c33e65221994bb6865d22dd0994545603ba8
GitHub-Last-Rev: aca92afcbdef2dd191ed0e5c61da29d3b1cb0698
GitHub-Pull-Request: golang/go#61649
Reviewed-on: https://go-review.googlesource.com/c/go/+/514075
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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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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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Auto-Submit: Keith Randall <khr@golang.org>
Sean Liao [Sun, 30 Jul 2023 08:46:55 +0000 (09:46 +0100)]
.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> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
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Change-Id: I13a96467108771df31f018853df754e42100e773
Reviewed-on: https://go-review.googlesource.com/c/go/+/512395
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Mauri de Souza Meneguzzo [Thu, 27 Jul 2023 23:11:59 +0000 (23:11 +0000)]
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: 1e17f2e6bae60cf5168d687dd1357ab58a883675
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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Joel Sing [Fri, 28 Jul 2023 16:03:38 +0000 (02:03 +1000)]
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
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Joel Sing [Fri, 28 Jul 2023 10:20:39 +0000 (20:20 +1000)]
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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Auto-Submit: Ian Lance Taylor <iant@golang.org>
Joel Sing [Fri, 28 Jul 2023 09:59:36 +0000 (19:59 +1000)]
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> Reviewed-by: Rong Zhang <rongrong@oss.cipunited.com> Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
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Joel Sing [Fri, 28 Jul 2023 09:27:22 +0000 (19:27 +1000)]
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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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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Cherry Mui [Wed, 14 Jun 2023 21:09:30 +0000 (17:09 -0400)]
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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Cherry Mui [Thu, 15 Jun 2023 21:25:08 +0000 (17:25 -0400)]
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>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Cherry Mui [Mon, 12 Jun 2023 17:42:30 +0000 (13:42 -0400)]
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
Run-TryBot: Cherry Mui <cherryyz@google.com> Reviewed-by: Than McIntosh <thanm@google.com>
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Matthew Dempsky [Thu, 27 Jul 2023 23:20:36 +0000 (16:20 -0700)]
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>
Run-TryBot: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Keith Randall <khr@google.com>
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Joel Sing [Sat, 29 Apr 2023 10:29:41 +0000 (20:29 +1000)]
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 Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
Robert Griesemer [Wed, 26 Jul 2023 00:18:20 +0000 (17:18 -0700)]
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> Reviewed-by: Robert Griesemer <gri@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Bypass: Robert Griesemer <gri@google.com>
Joel Sing [Wed, 3 May 2023 11:56:18 +0000 (21:56 +1000)]
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 Reviewed-by: David Chase <drchase@google.com>
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Joel Sing [Mon, 1 May 2023 17:42:30 +0000 (03:42 +1000)]
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 Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
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new s390x assembly implementation of Sin/Cos/SinCos/Tan handle huge argument
test's.
Updates #29240
Change-Id: I9f22d9714528ef2af52c749079f3727250089baf
Reviewed-on: https://go-review.googlesource.com/c/go/+/509675
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Carl Johnson [Thu, 27 Jul 2023 01:21:48 +0000 (01:21 +0000)]
reflect: add TypeFor
Fixes #60088
Change-Id: I7b43d329def22c2524501ba1d6bfc73becc823d1
GitHub-Last-Rev: becd714c4562da4a3280c3a56ebaf246e48e9f37
GitHub-Pull-Request: golang/go#61598
Reviewed-on: https://go-review.googlesource.com/c/go/+/513478
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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
Reviewed-on: https://go-review.googlesource.com/c/go/+/512576
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Run-TryBot: Ian Lance Taylor <iant@golang.org>
CL 496037 had ignored 3 types of null route, however blackhole route
is not included i.e. on Linux we can add a blackhole route by
`ip route add blackhole 198.18.0.254/32`
Fixes #61590
Change-Id: I9ddb86c5be0e5e261afa96cbaf55d9fdf30b2795
Reviewed-on: https://go-review.googlesource.com/c/go/+/513595
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Srinivas Pokala [Mon, 20 Feb 2023 06:10:37 +0000 (07:10 +0100)]
math: huge argument handling for sin/cos in s390x
Currently s390x, sin/cos assembly implementation not handling huge
arguments. This change reverts assembly routine to native go implementation
for huge arguments. Implementing the changes in assembly giving better
performance than native go changes in terms of execution/cycles.
korzhao [Thu, 29 Jun 2023 12:09:40 +0000 (20:09 +0800)]
encoding/json: replace dead link in appendString
Change-Id: I534698008b46b23352d9f1fed891fd96dc0947b7
Reviewed-on: https://go-review.googlesource.com/c/go/+/507115 Reviewed-by: Daniel Martí <mvdan@mvdan.cc> Reviewed-by: Ian Lance Taylor <iant@google.com>
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Dmitri Shuralyov [Fri, 21 Jul 2023 19:59:02 +0000 (15:59 -0400)]
cmd/dist: update isUnsupportedVMASize test skip
The dist test name changed from "race" to "flag:race", "net:race",
"os:race" and so on in CL 496181, we missed that this skip was checking
the exact dist test name, and no builder reported a problem despite the
skip becoming inactive.
I considered deleting it as obsolete, but it may still be helpful
if someone runs race.bash on a linux/arm64 machine configured with
something other than the supported 48-bit VMA. So for now apply a
simple change to restore the existing skip.
Hopefully one day there will be a good way to check for unsupported VMA
size and disable the race detector conditionally instead of relying on
tests running, failing, and getting marked as skipped in cmd/dist.
For #29948.
For #37486.
Change-Id: I8af6862c92fb0ee538ab27327d43c50921bd1873
Reviewed-on: https://go-review.googlesource.com/c/go/+/512116 Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
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Dmitri Shuralyov [Thu, 27 Jul 2023 23:36:55 +0000 (19:36 -0400)]
syscall, cmd/cgo: skip tests that shouldn't run under 'unshare -n -r'
A small number of tests in the main tree are currently skipped in LUCI
because our builders there run tests without root. Unfortunately, these
tests begin to run when run under 'unshare -n -r' as implemented in
the current iteration of a no-network check. Add targeted builder-only
skips so that they don't begin to run and fail with a false positive.
Updates #10719.
For #30612.
Change-Id: I6dd320714a279c395882c1b2ebfbb2fce58f913b
Reviewed-on: https://go-review.googlesource.com/c/go/+/513779
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
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Mauri de Souza Meneguzzo [Fri, 28 Jul 2023 19:10:04 +0000 (19:10 +0000)]
cmd/asm: add PCALIGN support on 386/amd64
The PCALIGN asm directive was not supported on 386/amd64,
causing a compile-time error when used. The same directive
is currently supported on arm64, loong64 and ppc64 architectures.
This has potential for noticeable performance improvements on
amd64 across multiple packages, I did a quick test aligning a hot
loop on bytes.IndexByte:
Dmitri Shuralyov [Fri, 28 Jul 2023 16:34:30 +0000 (12:34 -0400)]
syscall: skip TestUnshare if there's nothing more to unshare
Tests that need to use the internet are expected not to run when -short
test flag is set, and the Go build system automatically catches when a
test forgets that. It does this by unsharing all real network interfaces
and leaving only a loopback interface in a new network namespace.
TestUnshare tests that a process started with CLONE_NEWNET unshare flag
has fewer network interfaces than before. Of course, if /proc/net/dev
starts out with a single loopback interface, the test would fail with
a false positive:
=== RUN TestUnshare
exec_linux_test.go:139: Got 3 lines of output, want <3
--- FAIL: TestUnshare (0.00s)
Give the test what it wants: a skip when the environment doesn't meet
the minimum requirements for the test, and more useful log output if
it fails.
Change-Id: I6b9c29d88ce725e640a7ee86c7e1be9761f21b02
Reviewed-on: https://go-review.googlesource.com/c/go/+/513762 Reviewed-by: Ian Lance Taylor <iant@google.com>
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Jes Cok [Sat, 1 Jul 2023 14:01:23 +0000 (14:01 +0000)]
cmd/internal/goobj: use unsafe.String in toString func
Change-Id: I93a5e0996e48cc74e6b2e39c3a4c7aa68fd6a3a0
GitHub-Last-Rev: afd8feb0deac34f671e0ed11ad55f6be427bd8b1
GitHub-Pull-Request: golang/go#61137
Reviewed-on: https://go-review.googlesource.com/c/go/+/507517
Run-TryBot: Keith Randall <khr@golang.org>
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Dmitri Shuralyov [Sun, 23 Jul 2023 18:19:57 +0000 (14:19 -0400)]
net/http: perform streaming body feature detection once per process
As far a I can tell, there's currently no situation where this feature
detection will report a different result per request, so default to
doing once per process until there's evidence that doing it more often
is worthwhile.
Change-Id: I567d3dbd847af2f49f2e83cd9eb0ae61d82c1f83
Reviewed-on: https://go-review.googlesource.com/c/go/+/513459 Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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root [Thu, 23 Feb 2023 06:44:23 +0000 (06:44 +0000)]
math: support to handle huge arguments in tan function on s390x
Currently on s390x, tan assembly implementation is not handling huge arguments at all. This change is to check for large arguments and revert back to native go implantation from assembly code in case of huge arguments.
The changes are implemented in assembly code to get better performance over native go implementation.
Benchmark details of tan function with table driven inputs are updated as part of the issue link.
Fixes #37854
Change-Id: I4e5321e65c27b7ce8c497fc9d3991ca8604753d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/470595 Reviewed-by: Keith Randall <khr@google.com>
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Change-Id: I49407193e2050543ef983cd637703acc682d9f51
GitHub-Last-Rev: 7bc9ccf1dcb4b444406430b451ad4c47c6ec1be2
GitHub-Pull-Request: golang/go#61440
Reviewed-on: https://go-review.googlesource.com/c/go/+/511035
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Ian Lance Taylor [Wed, 26 Jul 2023 18:58:44 +0000 (11:58 -0700)]
runtime: call miniterrno on m0 on AIX and Solaris
AIX and Solaris call into libc for syscalls, and expect M.mOS.perrno
to point to the thread-local errno value for the current M.
We initialize that field in miniterrno called from mstart.
However, this means that any libc calls before mstart will not
return the correct errno value.
This caused trouble in checkfds, which runs very early, before mstart.
We worked around that in 513215. This CL reverts 513215 in favor
of a better workaround: call miniterrno for m0 earlier (we will
still wind up calling miniterrno again from mstart, which does
no harm).
This is a better workaround because it means that if we add future
syscalls before mstart, they will behave as expected.
Fixes #61584
Change-Id: Ib6a0d3c53d2c8214cc339a5019f9d4f71a746f0c
Reviewed-on: https://go-review.googlesource.com/c/go/+/513535 Reviewed-by: Ian Lance Taylor <iant@google.com>
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Dmitri Shuralyov [Tue, 25 Jul 2023 17:58:37 +0000 (13:58 -0400)]
net: make mustHaveExternalNetwork work as usual on GOOS=linux
I considered deleting mustHaveExternalNetwork in favor of just using
the real testenv.MustHaveExternalNetwork. That certainly makes these
tests that call it easier to understand. But that negatively affects
some ports that don't have a longtest builder as it'd make the tests
not run automatically on any builder at all.
So, make a minimal change that applies only to GOOS=linux for now.
If we make more progress on establishing -longtest builders for all
ports, this intermediate layer helper will cease to have any benefit
and can be deleted in favor of the one in testenv package.
Change-Id: Iaea207d98e780db429ab49e6e227650a8b35b786
Reviewed-on: https://go-review.googlesource.com/c/go/+/513416
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org> Reviewed-by: Heschi Kreinick <heschi@google.com>
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Jes Cok [Tue, 25 Jul 2023 23:10:34 +0000 (23:10 +0000)]
all: use built-in clear to clear maps
Change-Id: I7f4ac72fe3230d8b7486fab0c925015cefcbe355
GitHub-Last-Rev: 54455839b674f980fb6c3afceb433db4833d340e
GitHub-Pull-Request: golang/go#61544
Reviewed-on: https://go-review.googlesource.com/c/go/+/512376 Reviewed-by: Ian Lance Taylor <iant@google.com>
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Cherry Mui [Mon, 10 Jul 2023 23:04:57 +0000 (19:04 -0400)]
cmd/cgo/internal/test: don't pass -lm on darwin
On darwin, -lm is not necessary as the math functions are included
in libSystem. Passing -lm multiple times results in linker
warnings. Don't pass it on darwin.
For #61229.
Change-Id: I72d8dab1f0eead68cbeb176ac97b8ed1a0cfddab
Reviewed-on: https://go-review.googlesource.com/c/go/+/508697
Run-TryBot: Cherry Mui <cherryyz@google.com>
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Dmitri Shuralyov [Thu, 27 Jul 2023 17:03:58 +0000 (13:03 -0400)]
src/buildall.bash: mention no longer being used by Go build system
The buildall.bash script was initially added in 2015 (in CL 9438),
documented as used in the implementation of the new compile-only
builders at the time.
That description was updated as the builder implementation changed
from "linux-amd64-compilesmoke" to "all-compile" and most recently
to "misc-compile", which it still mentions today.
The build system stopped using it in CL 464955 and there are no plans
to use it again in the future, so update the description so that it's
not misleading. Notably, adding additional checks to this script does
not mean they will be caught by builders.
Updates #31916.
Updates #58163.
Change-Id: I17558b1c150a3ad95105de14511c51791287991b
Reviewed-on: https://go-review.googlesource.com/c/go/+/513755 Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
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Dmitri Shuralyov [Wed, 14 Jun 2023 00:14:26 +0000 (20:14 -0400)]
cmd/dist: skip testing packages without tests in short test mode
For short all.bash, we can keep the small speedup of 2-10 seconds by
skipping 'go test' on packages without tests. This is viable without
coverage loss since the Go release process is guaranteed to run long
tests for all first class ports.
For golang/go#60463.
Change-Id: Ib5a6bd357d757141bc8f1c1dec148a6565726587
Reviewed-on: https://go-review.googlesource.com/c/go/+/503115
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Dmitri Shuralyov [Tue, 13 Jun 2023 20:04:06 +0000 (16:04 -0400)]
cmd/dist: test all 'std cmd' packages, even ones without _test.go files
Remove the optimization added in CL 10492 that skips running 'go test'
on Go packages without _test.go files. By now, 'go test' can find real
problems even in packages that don't have any custom tests.
On my fairly fast laptop, running go test -short on all 164 normal
and 96 vendored packages without tests took around 10 seconds on
the first run and 2.5 seconds on the second, a small fraction of
the total all.bash time. So prioritize gains in the test coverage
over those savings in all.bash time.
Fixes golang/go#60463.
Change-Id: I3d2bec5c367de687e57131e7fd7e6b84fed30187
Reviewed-on: https://go-review.googlesource.com/c/go/+/503095
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erifan01 [Tue, 6 Jun 2023 09:55:58 +0000 (17:55 +0800)]
cmd/asm: add the fifth argument of the instruction to Optab on arm64
Currently the Optab structure contains four arguments of an instruction,
excludes the fifth argument p.RegTo2. It does not participate in
instruction matching and is usually handled separately.
Instructions with five operands are common in the newer arm instruction
set, so this CL adds the fifth argument to Optab, so that instruction
matching is easier. This caused the oplook function also needs to be
updated synchronously, this CL also made some cleaning and modifications
to this function.
Change-Id: I1d95ad99e72a44dfad1e00db182cfc369a0e55c6
Reviewed-on: https://go-review.googlesource.com/c/go/+/505975 Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Eric Fang <eric.fang@arm.com>
Ian Lance Taylor [Wed, 26 Jul 2023 18:08:03 +0000 (11:08 -0700)]
maps: remove Keys and Values
Preserve the names in case we want them to return an iterator.
Keep the efficient runtime implementations for now,
as we will probably want them under some name, perhaps KeysSlice
and ValuesSlice.
Fixes #61538
Change-Id: I6b03010bf071fb4531cb2f967dad46425962fcb8
Reviewed-on: https://go-review.googlesource.com/c/go/+/513476
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Russ Cox <rsc@golang.org>
The code was sorting files in the archives entirely by path string,
but that's not what fs.WalkDir would do. In a directory with
subdirectory foo/bar and file foo/bar.go, foo/bar gets visited
first, so foo/bar/baz appears before foo/bar.go, even though
"foo/bar/baz" > "foo/bar.go".
This CL replaces the string comparison with a path-aware
comparison that places foo/bar/baz before foo/bar.go,
so that if the tar file is extracted and then repacked using
fs.WalkDir, the files will remain in the same order.
This will make it easier to compare the pristine distpack-produced
tgz for darwin against the rebuilt tgz with signed binaries.
Keith Randall [Tue, 30 May 2023 17:19:50 +0000 (10:19 -0700)]
cmd/compile: simplify uninterruptable range check for write barriers
Make the load detection a bit clearer and more precise. In particular,
for architectures which have to materialize the address using a
separate instruction, we were using the address materialization
instruction, not the load itself.
Also apply the marking a bit less. We don't need to mark the load itself,
only the instructions after the load. And we don't need to mark the WBend
itself, only the instructions before it.
Change-Id: Ie367a8023b003d5317b752d873bb385f931bb30e
Reviewed-on: https://go-review.googlesource.com/c/go/+/499395 Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com>
os: remove 5ms sleep on Windows in (*Process).Wait
The 5ms sleep in (*Process).Wait was added to mitigate errors while
removing executable files using os.RemoveAll.
Windows 10 1903 implements POSIX semantics for DeleteFile, making the
implementation of os.RemoveAll on Windows much more robust. Older
Windows 10 versions also made internal improvements to avoid errors
when removing files, making it less likely that the 5ms sleep is
necessary.
Windows 10 is the oldest version that Go supports (see #57004), so it
makes sense to unconditionally remove the 5ms sleep now. We have all
the Go 1.22 development cycle to see if this causes any regression.
Johan Brandhorst-Satzkorn [Tue, 25 Jul 2023 22:54:16 +0000 (15:54 -0700)]
misc/wasm: switch default WASI runtime
The default WASI runtime was originally set to Wazero, because it was
the first runtime used to test the Go implementation and because we
could easily find and fix issues in our implementation and theirs.
In CL 498675 we switched the default wasip1 runner to Wasmtime as it
runs faster and is a more established and mature runtime. We should
switch the default runtime to Wasmtime to consistently promote
Wasmtime as the primary tested and approved runtime.
Change-Id: Ic6c064142321af90f015e02b7fe0e71444d8842c
Reviewed-on: https://go-review.googlesource.com/c/go/+/513235
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Eli Bendersky <eliben@google.com>
Run-TryBot: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
Auto-Submit: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Joel Sing [Fri, 28 Apr 2023 20:07:42 +0000 (06:07 +1000)]
cmd/internal/obj/arm64: factor out splitting of 24 bit unsigned scaled immediates
Rather than duplicating this code, factor it out into a function and
add test coverage.
Change-Id: I37ce568ded4659d98a4ff1361520c5fb2207e947
Reviewed-on: https://go-review.googlesource.com/c/go/+/512537
Run-TryBot: Joel Sing <joel@sing.id.au>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
Joel Sing [Wed, 3 May 2023 08:19:30 +0000 (18:19 +1000)]
cmd/internal/obj/arm64: simplify buildop
This code stems from the original 7l C code, where one way to determine
the end of a table is to put a sentinel entry, then scan for it. This is
now Go code and the length of an array is readily available.
Remove the sentinel and sentinel scan, then adjust the remaining code to
work accordingly.
Change-Id: I8964c787f5149f3548fa78bf8923aa7a93f9482e
Reviewed-on: https://go-review.googlesource.com/c/go/+/512536 Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
encoding/base32: reduce overflow risk when calc encode/decode len
Same as https://go-review.googlesource.com/c/go/+/510635, reduces risk of overflow
Change-Id: I18f5560d73af76c3e853464a89ad7e42dbbd5894
GitHub-Last-Rev: 652c8c6712886184e59a110c3fa1e6dcb643d93b
GitHub-Pull-Request: golang/go#61547
Reviewed-on: https://go-review.googlesource.com/c/go/+/512200
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Robert Griesemer [Fri, 30 Jun 2023 21:54:34 +0000 (14:54 -0700)]
spec: update section on type unification for Go 1.21
This leaves the specific unification details out in favor
of a (forthcoming) section in an appendix.
Change-Id: If984c48bdf71c278e1a2759f9a18c51ef58df999
Reviewed-on: https://go-review.googlesource.com/c/go/+/507417 Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Bypass: Robert Griesemer <gri@google.com>
Ian Lance Taylor [Tue, 25 Jul 2023 22:14:03 +0000 (15:14 -0700)]
runtime2: don't check fcntl errno in checkfds on AIX and Solaris
On AIX and Solaris the errno value is fetched using m.mOS.perrno.
When checkfds is called, that value has not yet been set up by minit.
Since the error value doesn't really matter in checkfds,
don't bother to check it on AIX and Solaris.
Fixes #61584
Change-Id: I4e679ee3fdad4f0b833ae102597b2d6b8cb46cb6
Reviewed-on: https://go-review.googlesource.com/c/go/+/513215
Run-TryBot: Ian Lance Taylor <iant@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Roland Shoemaker <roland@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>