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Commit Graph

55790 Commits

Author SHA1 Message Date
Jakub Ciolek
bb5ff5342d cmd/compile: make loopbce handle 8, 16 and 32 bit induction variables
Compute limits and increment values for all integer widths.
Resolves 2 TODO's in loopbce.go

compilecmp linux/amd64:

compress/flate
compress/flate.(*huffmanEncoder).bitCounts 1235 -> 1207  (-2.27%)

cmd/internal/obj/wasm
cmd/internal/obj/wasm.assemble 7443 -> 7303  (-1.88%)
cmd/internal/obj/wasm.assemble.func1 165 -> 138  (-16.36%)

cmd/link/internal/ld
cmd/link/internal/ld.(*Link).findfunctab.func1 1646 -> 1627  (-1.15%)

Change-Id: I2d79b7376eb67d6bcc8fdaf0c197c11e631562d0
Reviewed-on: https://go-review.googlesource.com/c/go/+/435258
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
2023-01-23 18:10:40 +00:00
j2gg0s
9411075748 runtime: remove duplicate check of work.full in gcMark.
Change-Id: I659669d7259e7cf73f730232cda11d8525a4aabc
GitHub-Last-Rev: 5d183e8128
GitHub-Pull-Request: golang/go#57901
Reviewed-on: https://go-review.googlesource.com/c/go/+/462281
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2023-01-23 18:00:36 +00:00
David Chase
e22bd2348c internal/abi,runtime: refactor map constants into one place
Previously TryBot-tested with bucket bits = 4.
Also tested locally with bucket bits = 5.
This makes it much easier to change the size of map
buckets, and hopefully provides pointers to all the
code that in some way depends on details of map layout.

Change-Id: I9f6669d1eadd02f182d0bc3f959dc5f385fa1683
Reviewed-on: https://go-review.googlesource.com/c/go/+/462115
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Austin Clements <austin@google.com>
2023-01-23 15:51:32 +00:00
Daniel Martí
e2fe35363d runtime: use copy as spotted by staticcheck
Change-Id: Ibffe46bad7d30df9380ba18d49eeb6782406a1aa
Reviewed-on: https://go-review.googlesource.com/c/go/+/463115
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2023-01-23 10:02:20 +00:00
Keith Randall
ba91377454 test: test that we schedule OpArgIntReg early
If OpArgIntReg is incorrectly scheduled, that causes it to be spilled
incorrectly, which causes the argument to not be considered live
at the start of the function.

This is the test for CL 462858

Add a brief mention of why CL 462858 is needed in the scheduling code.

Change-Id: Id199456f88d9ee5ca46d7b0353a3c2049709880e
Reviewed-on: https://go-review.googlesource.com/c/go/+/462899
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
2023-01-21 21:08:30 +00:00
Keith Randall
4ff074945a cmd/compile: sort liveness variable reports
Sort variables before display so that when there are multiple variables
to report, they are in a consistent order.

Otherwise they are ordered in the order they appear in the fn.Dcl list,
which can vary. Particularly, they vary depending on regabi.

Change-Id: I0db380f7cbe6911e87177503a4c3b39851ff1b5a
Reviewed-on: https://go-review.googlesource.com/c/go/+/462898
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-01-21 21:08:00 +00:00
David Chase
780fa24260 net: add testing.Short Skip to test affected by local network configuration
If the local network mangles invalid DNS queries, that is not a Go problem.

Change-Id: I54db392532eed988bca81b70a98cd6d11766af89
Reviewed-on: https://go-review.googlesource.com/c/go/+/461275
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-21 21:06:53 +00:00
fangguizhen
85b49d7f21 bytes,strings: add some examples
Change-Id: Ic93ad59119f3549c0f13c4f366f71e9d01b88c47
GitHub-Last-Rev: afb5180472
GitHub-Pull-Request: golang/go#57907
Reviewed-on: https://go-review.googlesource.com/c/go/+/462283
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
2023-01-20 23:21:39 +00:00
matsuyoshi30
0518e33f6c path/filepath: fix evaluation of symlinks to paths under /tmp on macOS
For symlinks created from symlinks under the root directory created
as the relative path (e.g., symbolic links under /tmp), we update vol and volLen.

Fixes #57905

Change-Id: I45affd1db3b93109de51bf19b181f3cdba061109
Reviewed-on: https://go-review.googlesource.com/c/go/+/461761
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2023-01-20 22:42:39 +00:00
fangguizhen
27b6ace2b4 errors: move example functions into example_test file
Change-Id: Ide70476698d82a51881802dd6bf05dd7abcd60e8
GitHub-Last-Rev: ddb251ded6
GitHub-Pull-Request: golang/go#57931
Reviewed-on: https://go-review.googlesource.com/c/go/+/462292
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
2023-01-20 21:55:10 +00:00
Than McIntosh
620399ef0d internal/coverage/decodemeta: fix coding error in func literal handling
Fix a coding error in coverage meta-data decoding in the method
decodemeta.CoverageMetaDataDecoder.ReadFunc. The code was not
unconditionally assigning the "function literal" field of the
coverage.FuncDesc object passed in, resulting in bad values depending
on what the state of the field happened to be in the object.

Fixes #57942.

Change-Id: I6dfd7d7f7af6004f05c622f9a7116e9f6018cf4f
Reviewed-on: https://go-review.googlesource.com/c/go/+/462955
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-01-20 21:42:05 +00:00
Than McIntosh
cf70d37967 runtime/coverage: avoid non-test coverage profiles in test report helper
When walking through the set of coverage data files generated from a
"go test -cover" run, it's possible to encounter pods (clumps of data
files) that were generated by a run from an instrumented Go tool (for
example, cmd/compile). Add a guard to the test reporting code to
ensure that it only processes files created by the currently running
test.

Fixes #57924.

Change-Id: I1bb7dce88305e1088162e3cb1df628486ecee1c1
Reviewed-on: https://go-review.googlesource.com/c/go/+/462756
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
2023-01-20 21:41:45 +00:00
Sameer Ajmani
8bec956360 context: add APIs for setting a cancelation cause when deadline or timer expires
Fixes #56661

Change-Id: I1c23ebc52e6b7ae6ee956614e1a0a45d6ecbd5b4
Reviewed-on: https://go-review.googlesource.com/c/go/+/449318
Run-TryBot: Sameer Ajmani <sameer@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-20 21:41:01 +00:00
Robert Findley
59964663e5 go/types: add a test that generated files match types2
Adjust the go/types file generation to run in a test, so that we can
easily reuse the existing logic to verify that the current content of
go/types matches the expected result of generating from types2.

This test will enforce that we don't forget to regenerate go/types when
making changes to types2.

Change-Id: Iee14b1402065f7f0ecbcf28000e07a06c08fa42e
Reviewed-on: https://go-review.googlesource.com/c/go/+/462758
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Findley <rfindley@google.com>
2023-01-20 21:15:52 +00:00
Kevin Parsons
e587a7691b cmd/link: fix incorrect DOS header on Windows binaries
The previous DOS header placed on Windows binaries was incorrect, as it had e_crlc (number of relocations) set to 4, instead of e_cparhdr (size of header in 16-bit words) set to 4. This resulted in execution starting at the beginning of the file, instead of where the DOS stub code actually exists.

Fixes #57834

Change-Id: I8c5966b65c72b2474b771b85aaadb61cad9f5be6
GitHub-Last-Rev: c715ad290a
GitHub-Pull-Request: golang/go#57835
Reviewed-on: https://go-review.googlesource.com/c/go/+/462054
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
2023-01-20 20:52:48 +00:00
Keith Randall
b08d5ee5e9 cmd/compile: ensure register args come before on-stack args in schedule
The register allocator doesn't like OpArg coming in between other
OpIntArg operations, as it doesn't put the spills in the right place
in that situation.

This is just a bug in the new scheduler, I didn't copy over the
proper score from the old scheduler correctly.

Change-Id: I3b4ee1754982fb360e99c5864b19e7408d60b5bc
Reviewed-on: https://go-review.googlesource.com/c/go/+/462858
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-20 19:51:06 +00:00
Changkun Ou
f07910bd57 sync: document memory model for Swap/CompareAnd{Swap,Delete} in Map
CL 381316 documented the memory model of Map's APIs. However, the newly
introduced Swap, CompareAndSwap, and CompareAndDelete are missing from
this documentation as CL 399094 did not add this info.

This CL specifies the defined read/write operations of the new Map APIs.

For #51972

Change-Id: I519a04040a0b429a3f978823a183cd62e42c90ae
Reviewed-on: https://go-review.googlesource.com/c/go/+/459715
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Changkun Ou <mail@changkun.de>
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
2023-01-20 19:38:29 +00:00
Robert Griesemer
5724daa682 go/types, types2: use go.dev/issue/nnnnn when referring to an issue (cleanup)
Apply the following regex substitutions, in order:

golang/go#(\d+)  =>  go.dev/issue/$1
issue #?(\d+)    =>  go.dev/issue/$1

Providing a link uniformly makes it easier to find the respective issue.

Change-Id: I9b60ffa1adb95be181f6711c2f171be3afe2b315
Reviewed-on: https://go-review.googlesource.com/c/go/+/462856
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Run-TryBot: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
2023-01-20 18:13:03 +00:00
Robert Griesemer
4b23068712 types2: add *Config to typecheck functions for tests, factor more code
Some tests in go/types can still not use the typecheck helper functions
because they need a specific fileset for position information.

(We could use a single global file set for all tests to make this work.)

Change-Id: I73552b08a00f08d809c319d3d2328acee9532619
Reviewed-on: https://go-review.googlesource.com/c/go/+/461694
Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Run-TryBot: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2023-01-20 18:13:01 +00:00
Robert Griesemer
e38cb25b33 go/types: generate instantiate.go
Change-Id: Iad8b78bbf52eb2b0de05471bfd5a5506dc45e055
Reviewed-on: https://go-review.googlesource.com/c/go/+/461693
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-20 18:12:59 +00:00
Robert Griesemer
2507e7897b go/types: provision for generating initorder.go, but disabled for now
Add the code to generate initorder.go but do not enable the generation
of that file for now because the generated  use uses error_ which has
implications for gopls use (error_ produces a single error instead of
pultiple \t-indented follow-on errors).

Change-Id: I5cd8acdeb8845dbb4716f19cf90d88191dd4216c
Reviewed-on: https://go-review.googlesource.com/c/go/+/461692
Reviewed-by: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
2023-01-20 18:12:57 +00:00
Dmitri Shuralyov
1011ccad5c cmd/dist: mark linux/sparc64 as a broken port, remove incomplete map
The linux/sparc64 port is incomplete—it doesn't work, and it doesn't
have a builder. Now that dist supports broken ports, mark it as such.

The incomplete map was created to hide ports that aren't functional
from dist list output. Now that we have the broken port concept, it
seems largely redundant, so remove it for now.

For #56679.
Updates #28944.

Change-Id: I34bd23e913ed6d786a4d0aa8d2852f2b926fe4b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/458516
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2023-01-20 17:52:28 +00:00
Dmitri Shuralyov
399ad79fa6 cmd/dist: add map of broken ports and -force flag
It's empty so far. The next CL adds linux/sparc64.

Also add -force flag to the bootstrap.bash script
so that it's possible to use it with broken ports.

For #56679.

Change-Id: I09c733d0df0a68df34fb808eae29be010a6da461
Reviewed-on: https://go-review.googlesource.com/c/go/+/458515
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-20 17:52:26 +00:00
Dmitri Shuralyov
e7495d8737 cmd/dist: remove GOTESTONLY environment variable
This hook was added for the Go build system (x/build) to be able to set
the run flag value, but it's no longer used anywhere. Remove it for now.

Updates #46054.

Change-Id: I64e7d68d2b270303f3bd54f73079600f209e350a
Reviewed-on: https://go-review.googlesource.com/c/go/+/455519
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-20 17:47:38 +00:00
Dmitri Shuralyov
09d852ceac cmd/dist: remove hardcoded timeout scale for arm and mips{,le,64,64le}
Fixes #57117.

Change-Id: If36da5b138a5e92e27688719ffc1c4dafd590957
Reviewed-on: https://go-review.googlesource.com/c/go/+/455518
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-20 17:47:35 +00:00
Anit Gandhi
62a994837a crypto/tls: improve client auth failure alerts
This change makes it easier for clients to debug mutual TLS connection failures. Currently, there are a few situations where invalid client auth leads to a generic "bad certificate" alert. 3 specific situations have a more appropriate TLS alert code, based on the alert descriptions in the appendix of both RFC5246 and RFC8446.
  1. The server is configured to require client auth, but no client cert was provided; the appropriate alert is "certificate required". This applies only to TLS 1.3, which first defined the certificate_required alert code.
  2. The client provided a cert that was signed by an authority that is not in the server's trusted set of CAs; the appropriate alert is "unknown certificate authority".
  3. The client provided an expired (or not yet valid) cert; the appropriate alert is "expired certificate".
Otherwise, we still fall back to "bad certificate".

Fixes #52113

Change-Id: I7d5860fe911cad8a1615f16bfe488a37e936dc36
GitHub-Last-Rev: 34eeab587b
GitHub-Pull-Request: golang/go#53251
Reviewed-on: https://go-review.googlesource.com/c/go/+/410496
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
Run-TryBot: Roland Shoemaker <roland@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Roland Shoemaker <roland@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
2023-01-20 16:19:42 +00:00
Ian Lance Taylor
8b79c41dd5 cmd/go: update test for change in panic(nil) behavior
panic(nil) now panics with runtime.PanicNilError.

For #25448

Change-Id: I58994aa80d4d11f0c5fcd988714f7b4b45c6b5ee
Reviewed-on: https://go-review.googlesource.com/c/go/+/462293
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
2023-01-20 15:49:29 +00:00
Daniel Martí
c641d48afd go/types: use internal/lazyregexp for goVersionRx
With benchinit, we see a noticeable improvement in init times:

	name     old time/op    new time/op    delta
	GoTypes    83.4µs ± 0%    43.7µs ± 1%  -47.57%  (p=0.029 n=4+4)

	name     old alloc/op   new alloc/op   delta
	GoTypes    26.5kB ± 0%    18.8kB ± 0%  -29.15%  (p=0.029 n=4+4)

	name     old allocs/op  new allocs/op  delta
	GoTypes       238 ± 0%       154 ± 0%  -35.29%  (p=0.029 n=4+4)

Port the same change to cmd/compile/internal/types and types2.

Updates #26775.

Change-Id: Ia1f7c4a4ce9a22d66e2aa9c9b9c341036993adca
Reviewed-on: https://go-review.googlesource.com/c/go/+/460544
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
2023-01-20 09:35:03 +00:00
Daniel Martí
8259ac4986 encoding/gob: shave off some init time cost
Avoid unnecessary allocations when calling reflect.TypeOf;
we can use nil pointers, which fit into an interface without allocating.
This saves about 1% of CPU time.

The builtin types are limited to typeIds between 0 and firstUserId,
and since firstUserId is 64, builtinIdToType does not need to be a map.
We can simply use an array of length firstUserId, which is simpler.
This saves about 1% of CPU time.

idToType is similar to firstUserId in that it is a map keyed by typeIds.
The difference is that it can grow with the user's types.
However, each added type gets the next available typeId,
meaning that we can use a growing slice, similar to the case above.
nextId then becomes the current length of the slice.
This saves about 1% of CPU time.

typeInfoMap is stored globally as an atomic.Value,
where each modification loads the map, makes a whole copy,
adds the new element, and stores the modified copy.
This is perfectly fine when the user registers types,
as that can happen concurrently and at any point in the future.

However, during init time, we sequentially register many types,
and the overhead of copying maps adds up noticeably.
During init time, use a regular global map instead,
which gets replaced by the atomic.Value when our init work is done.
This saves about 2% of CPU time.

Finally, avoid calling checkId in bootstrapType;
we have just called setTypeId, whose logic for getting nextId is simple,
so the extra check doesn't gain us much.
This saves about 1% of CPU time.

Using benchinit, which transforms GODEBUG=inittrace=1 data into Go
benchmark compatible output, results in a nice improvement:

	name         old time/op    new time/op    delta
	EncodingGob     175µs ± 0%     162µs ± 0%  -7.45%  (p=0.016 n=5+4)

	name         old alloc/op   new alloc/op   delta
	EncodingGob    39.0kB ± 0%    36.1kB ± 0%  -7.35%  (p=0.016 n=5+4)

	name         old allocs/op  new allocs/op  delta
	EncodingGob       588 ± 0%       558 ± 0%  -5.10%  (p=0.000 n=5+4)

Updates #26775.

Change-Id: I28618e8b96ef440480e666ef2cd5c4a9a332ef21
Reviewed-on: https://go-review.googlesource.com/c/go/+/460543
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Rob Pike <r@golang.org>
Run-TryBot: Rob Pike <r@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-20 09:34:41 +00:00
Daniel Martí
f53137f95c internal/profile: use internal/lazyregexp for the legacy parser
Per benchinit, this makes a big difference to init times:

	name             old time/op    new time/op    delta
	InternalProfile     185µs ± 1%       6µs ± 1%  -96.51%  (p=0.008 n=5+5)

	name             old alloc/op   new alloc/op   delta
	InternalProfile     101kB ± 0%       4kB ± 0%  -95.72%  (p=0.008 n=5+5)

	name             old allocs/op  new allocs/op  delta
	InternalProfile       758 ± 0%        25 ± 0%  -96.70%  (p=0.008 n=5+5)

The fixed 0.2ms init cost is saved for any importer of net/http/pprof,
but also for cmd/compile, as it supports PGO now.
A Go program parsing profiles might not even need to compile these
regular expressions at all, if it doesn't encounter any legacy files.
I suspect this will be the case with most invocations of cmd/compile.

Updates #26775.

Change-Id: I8374dc64459f0b6bb09bbdf9d0b6c55d7ae1646e
Reviewed-on: https://go-review.googlesource.com/c/go/+/460545
Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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2023-01-20 09:27:47 +00:00
Daniel Martí
1bef0707a5 cmd/link: use strings.LastIndexByte to fix a TODO
Go 1.20 will require Go 1.17 to bootstrap, so we can stop worrying about
older Go bootstrap versions. https://go.dev/issues/44505 fixed most of
those TODOs, but this one was presumably forgotten about.

Change-Id: I0c19ec4eec65cd807e7db9a57c5969845d915c07
Reviewed-on: https://go-review.googlesource.com/c/go/+/461155
Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
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2023-01-20 09:27:21 +00:00
Jakub Ciolek
8354f6b5bb cmd/compile: use a boolean as a avoid clobbering flags mov marker
The Value type implements Aux interface because it is being used as a
"avoid clobbering flags" marker by amd64, x86 and s390x SSA parts.

Create a boolean that implements the Aux interface. Use it as the marker
instead. We no longer need Value to implement Aux.

Resolves a TODO.

See CL 275756 for more info.

Change-Id: I8a1eddf7e738b8aa31e82f3c4c590bafd2cdc56b
Reviewed-on: https://go-review.googlesource.com/c/go/+/461156
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2023-01-20 05:01:15 +00:00
Srinivas Pokala
3e77efc720 cmd/internal/obj/s390x, runtime: fix breakpoint in s390x
Currently runtime.Breakpoint generates SIGSEGV in s390x.
The solution to this is add new asm instruction BRRK of
type FORMAT_E for the breakpoint exception.

Fixes #52103

Change-Id: I8358a56e428849a5d28d5ade141e1d7310bee084
Reviewed-on: https://go-review.googlesource.com/c/go/+/457456
Reviewed-by: Keith Randall <khr@golang.org>
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2023-01-20 05:00:12 +00:00
Jorropo
5c67ebbb31 cmd/compile: AMD64v3 remove unnecessary TEST comparision in isPowerOfTwo
With GOAMD64=V3 the canonical isPowerOfTwo function:
  func isPowerOfTwo(x uintptr) bool {
    return x&(x-1) == 0
  }

Used to compile to:
  temp := BLSR(x) // x&(x-1)
  flags = TEST(temp, temp)
  return flags.zf

However the blsr instruction already set ZF according to the result.
So we can remove the TEST instruction if we are just checking ZF.
Such as in multiple pieces of code around memory allocations.

This make the code smaller and faster.

Change-Id: Ia12d5a73aa3cb49188c0b647b1eff7b56c5a7b58
Reviewed-on: https://go-review.googlesource.com/c/go/+/448255
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2023-01-20 04:58:59 +00:00
Jorropo
fc814056aa cmd/compile: rewrite empty makeslice to zerobase pointer
make\(\[\][a-zA-Z0-9]+, 0\) is seen 52 times in the go source.
And at least 391 times on internet:
https://grep.app/search?q=make%5C%28%5C%5B%5C%5D%5Ba-zA-Z0-9%5D%2B%2C%200%5C%29&regexp=true
This used to compile to calling runtime.makeslice.
However we can copy what we do for []T{}, just use a zerobase pointer.

On my machine this is 10x faster (from 3ns to 0.3ns).
Note that an empty loop also runs in 0.3ns,
so this really is free when you count superscallar execution.

Change-Id: I1cfe7e69f5a7a4dabbc71912ce6a4f8a2d4a7f3c
Reviewed-on: https://go-review.googlesource.com/c/go/+/454036
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@google.com>
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2023-01-20 04:57:35 +00:00
liu-xuewen
57236fe9f7 runtime: remove 104 byte stack guard
The number 104 appears to date back to the
first implementation of split stacks in
https://go.googlesource.com/go/+/b987f7a757f53f460973622a36eebb696f9b5060.
That change introduces a 104 byte stack guard.
it doesn't makes any sense today.

Change-Id: I73069f6d1a827653af63e616f0119fbac809882e
GitHub-Last-Rev: bcf9000590
GitHub-Pull-Request: golang/go#56594
Reviewed-on: https://go-review.googlesource.com/c/go/+/448036
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Reviewed-by: Keith Randall <khr@google.com>
2023-01-20 04:55:48 +00:00
Keith Randall
12befc3ce3 cmd/compile: improve scheduling pass
Convert the scheduling pass from scheduling backwards to scheduling forwards.

Forward scheduling makes it easier to prioritize scheduling values as
soon as they are ready, which is important for things like nil checks,
select ops, etc.

Forward scheduling is also quite a bit clearer. It was originally
backwards because computing uses is tricky, but I found a way to do it
simply and with n lg n complexity. The new scheme also makes it easy
to add new scheduling edges if needed.

Fixes #42673
Update #56568

Change-Id: Ibbb38c52d191f50ce7a94f8c1cbd3cd9b614ea8b
Reviewed-on: https://go-review.googlesource.com/c/go/+/270940
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2023-01-20 04:54:01 +00:00
Marcel Meyer
b419db6c15 all: fix typos in go file comments
This is the second round to look for spelling mistakes. This time the
manual sifting of the result list was made easier by filtering out
capitalized and camelcase words.

grep -r --include '*.go' -E '^// .*$' . | aspell list | grep -E -x '[A-Za-z]{1}[a-z]*' | sort | uniq

This PR will be imported into Gerrit with the title and first
comment (this text) used to generate the subject and body of
the Gerrit change.

Change-Id: Ie8a2092aaa7e1f051aa90f03dbaf2b9aaf5664a9
GitHub-Last-Rev: fc2bd6e0c5
GitHub-Pull-Request: golang/go#57737
Reviewed-on: https://go-review.googlesource.com/c/go/+/461595
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2023-01-20 03:27:26 +00:00
Robert Griesemer
f52b8fa83f go/types: generate infer.go
Also, remove pos parameter from inferB (was unused).

Change-Id: I050f64d9fe916628499a55ca46f15c1f58ed4d1d
Reviewed-on: https://go-review.googlesource.com/c/go/+/461691
Auto-Submit: Robert Griesemer <gri@google.com>
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2023-01-20 01:31:26 +00:00
Robert Griesemer
cf9adf4a3e cmd/compile/internal/types2: remove useConstraintTypeInference flg (cleanup)
This useConstraintTypeInference flag was debugging purposes only and
is not needed anymore. It's already gone in go/types.

Also, adjust/fix some comments.

Change-Id: I713be5759f05c618fcf26e16cf53dfb3626bba93
Reviewed-on: https://go-review.googlesource.com/c/go/+/461690
Auto-Submit: Robert Griesemer <gri@google.com>
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2023-01-20 01:31:24 +00:00
fangguizhen
e590afcf2c bytes, strings: rename field in CutSuffix tests
Change-Id: I63181f6540fc1bfcfc988a16bf9fafbd3575cfdf
GitHub-Last-Rev: d90528730a
GitHub-Pull-Request: golang/go#57909
Reviewed-on: https://go-review.googlesource.com/c/go/+/462284
Reviewed-by: Ian Lance Taylor <iant@google.com>
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2023-01-20 01:25:45 +00:00
Alice
ae400d003f misc/cgo/testsanitizers: use fmt.Printf instead fmt.Println
Change-Id: Ie46bc3cbfb2622b5eb70618557ff5398866f5607
GitHub-Last-Rev: a665ef84dd
GitHub-Pull-Request: golang/go#57813
Reviewed-on: https://go-review.googlesource.com/c/go/+/462044
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2023-01-20 01:23:37 +00:00
fangguizhen
f33e8f6698 time: no need to wrap error with errors.New
Change-Id: Ibd519ed6419f8f21c89a111a0326d0788aca9d19
GitHub-Last-Rev: 45e3224f9a
GitHub-Pull-Request: golang/go#57819
Reviewed-on: https://go-review.googlesource.com/c/go/+/462046
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2023-01-20 01:07:08 +00:00
Damien Neil
045b33ecfe net/http: close Request.Body when pconn write loop exits early
The pconn write loop closes a request's body after sending the
request, but in the case where the write loop exits with an
unsent request in writech the body is never closed.

Close the request body in this case.

Fixes #49621

Change-Id: Id94a92937bbfc0beb1396446f4dee32fd2059c7e
Reviewed-on: https://go-review.googlesource.com/c/go/+/461675
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2023-01-20 01:06:03 +00:00
Ian Lance Taylor
78558d5e10 archive/zip: use base offset 0 if it has a valid entry
In CL 408734 we introduced a fall back to base offset 0 if reading a
directory entry at the computed base offset failed. We have now found
a file in the wild for which the computed base offset is incorrect,
but happens to refer to a valid directory entry. In this CL, we change
the fallback such that if the first directory header relative to base
offset 0 is valid, we just use base offset 0.

Change-Id: Ia9ace20c1065d1f651035f16f7d91d741ab1dbf4
Reviewed-on: https://go-review.googlesource.com/c/go/+/461598
Reviewed-by: Cherry Mui <cherryyz@google.com>
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Reviewed-by: Joseph Tsai <joetsai@digital-static.net>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
2023-01-20 01:04:11 +00:00
Wayne Zuo
5454834f01 cmd/internal/obj/riscv: add check for invalid shift amount input
Current RISCV64 assembler do not check the invalid shift amount. This CL
adds the check to avoid generating invalid instructions.

Fixes #57755

Change-Id: If33877605e161baefd98c50db1f71641ca057507
Reviewed-on: https://go-review.googlesource.com/c/go/+/461755
Reviewed-by: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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Reviewed-by: Than McIntosh <thanm@google.com>
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2023-01-19 23:30:35 +00:00
Keith Randall
45dc81d856 cmd/compile: add memory argument to GetCallerSP
We need to make sure that when we get the stack pointer, we get it
at the right time.

V = GetCallerSP
Call()
W = GetCallerSP

If Call causes a stack growth, then we will be in a situation
where V != W. So it matters when GetCallerSP operations get scheduled.
Add a memory argument to GetCallerSP so it can't be reordered with
things like calls.

Change-Id: I6cc801134c38e358c5a1ec0c09d38379a16a4184
Reviewed-on: https://go-review.googlesource.com/c/go/+/453515
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
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2023-01-19 22:43:22 +00:00
Dmitri Shuralyov
440ef8c4d2 cmd/internal/osinfo: report Node.js version
Seeing the Node.js version that was used during a particular test run
should be helpful during the upcoming migration from Node.js 14 to 18.
Add minimal support for that.

For golang/go#57614.

Change-Id: Id55ba25a7ee4a803788316d4a646cd4b6f4297e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/460655
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Reviewed-by: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
2023-01-19 22:43:17 +00:00
Keith Randall
f959fb3872 cmd/compile: add anchored version of SP
The SPanchored opcode is identical to SP, except that it takes a memory
argument so that it (and more importantly, anything that uses it)
must be scheduled at or after that memory argument.

This opcode ensures that a LEAQ of a variable gets scheduled after the
corresponding VARDEF for that variable.

This may lead to less CSE of LEAQ operations. The effect is very small.
The go binary is only 80 bytes bigger after this CL. Usually LEAQs get
folded into load/store operations, so the effect is only for pointerful
types, large enough to need a duffzero, and have their address passed
somewhere. Even then, usually the CSEd LEAQs will be un-CSEd because
the two uses are on different sides of a function call and the LEAQ
ends up being rematerialized at the second use anyway.

Change-Id: Ib893562cd05369b91dd563b48fb83f5250950293
Reviewed-on: https://go-review.googlesource.com/c/go/+/452916
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2023-01-19 22:43:12 +00:00
Dmitri Shuralyov
47a0d46716 cmd/compile/internal/ssa: generate code via a //go:generate directive
The standard way to generate code in a Go package is via //go:generate
directives, which are invoked by the developer explicitly running:

	go generate import/path/of/said/package

Switch to using that approach here.

This way, developers don't need to learn and remember a custom way that
each particular Go package may choose to implement its code generation.
It also enables conveniences such as 'go generate -n' to discover how
code is generated without running anything (this works on all packages
that rely on //go:generate directives), being able to generate multiple
packages at once and from any directory, and so on.

Change-Id: I0e5b6a1edeff670a8e588befeef0c445613803c7
Reviewed-on: https://go-review.googlesource.com/c/go/+/460135
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Keith Randall <khr@google.com>
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2023-01-19 22:42:34 +00:00