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Commit Graph

45018 Commits

Author SHA1 Message Date
Alberto Donizetti
0f82e58392 cmd/compile: switch to typed aux in more amd64 rules
Passes

  gotip build -toolexec 'toolstash -cmp' -a std

Change-Id: I9acda12d24f85d0b12d0cbbedbf9df3b4afcb31b
Reviewed-on: https://go-review.googlesource.com/c/go/+/256099
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2020-09-23 07:25:02 +00:00
zhouzhongyuan
83bc1ed316 encoding/binary: remove TODO in Write and add benchmarks
Benchmarks:
goos: linux
goarch: amd64
BenchmarkReadSlice1000Uint8s-8           4097088               296 ns/op        3381.06 MB/s
BenchmarkWriteSlice1000Uint8s-8          4372588               271 ns/op        3694.96 MB/s

Change-Id: I5b6ef0da5052e3381ee9c714bbff541c11ed0259
Reviewed-on: https://go-review.googlesource.com/c/go/+/246837
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Alberto Donizetti <alb.donizetti@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
2020-09-23 03:14:03 +00:00
Cuong Manh Le
0a9dd47dd8 net: reflect TCP backlog size update of uint16->uint32 on Linux
The sk_max_ack_backlog was increased from uint16 to uint32 in kernel
version 4.1 and above, so adopt that change to maxListenerBacklog.

See becb74f0ac

Fixes #41470

Change-Id: I63a142eb28f3ac3acaca57f0903c085c6cb15a6e
Reviewed-on: https://go-review.googlesource.com/c/go/+/255898
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2020-09-23 02:32:24 +00:00
Constantin Konstantinidis
d2bd93a010 cmd/compile: enforce strongly typed rules for ARM (6)
End of "constant folding in *shift ops" until EOF
(L1070-)
Toolstash-check is successful.

Change-Id: I55846a459aca5238f831750f04132e13a0baeed7
Reviewed-on: https://go-review.googlesource.com/c/go/+/234198
Reviewed-by: Giovanni Bajo <rasky@develer.com>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Giovanni Bajo <rasky@develer.com>
Run-TryBot: Giovanni Bajo <rasky@develer.com>
TryBot-Result: Go Bot <gobot@golang.org>
2020-09-22 22:49:21 +00:00
Constantin Konstantinidis
bfe72ec56a cmd/compile: enforce strongly typed rules for ARM (5)
From "absorb InvertFlags" until "constant folding in *shift ops"
L666-L1011
Toolstash-check is successful.

Change-Id: Ieed7d4643dc3dc2b3649477e87aebd22c81d1322
Reviewed-on: https://go-review.googlesource.com/c/go/+/234197
Reviewed-by: Giovanni Bajo <rasky@develer.com>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Giovanni Bajo <rasky@develer.com>
Run-TryBot: Giovanni Bajo <rasky@develer.com>
TryBot-Result: Go Bot <gobot@golang.org>
2020-09-22 22:49:06 +00:00
Constantin Konstantinidis
be01f54c24 cmd/compile: enforce strongly typed rules for ARM (3)
Toolstash-check successful from L270 until L543.

Change-Id: Ic39ab86c80f970bfb21e318284f6bb3e8a994220
Reviewed-on: https://go-review.googlesource.com/c/go/+/233439
Reviewed-by: Giovanni Bajo <rasky@develer.com>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Giovanni Bajo <rasky@develer.com>
Run-TryBot: Giovanni Bajo <rasky@develer.com>
TryBot-Result: Go Bot <gobot@golang.org>
2020-09-22 22:48:49 +00:00
Constantin Konstantinidis
7f7184686b cmd/compile: enforce strongly typed rules for ARM (2)
Toolstash-check successful from L0 until L268

Change-Id: Ifc55ea1e4177c21107c521fc72da2da7b507b8ba
Reviewed-on: https://go-review.googlesource.com/c/go/+/232811
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Giovanni Bajo <rasky@develer.com>
2020-09-22 22:47:43 +00:00
zhouzhongyuan
2813e22ef8 crypto/des: fix typo in permuteInitialBlock function comments
Fixes #41398

Change-Id: Ib47b8ec43bb11d8cd13c24f833532434127c7532
Reviewed-on: https://go-review.googlesource.com/c/go/+/254980
Reviewed-by: Roland Shoemaker <roland@golang.org>
Trust: Roland Shoemaker <roland@golang.org>
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Roland Shoemaker <roland@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
2020-09-22 21:24:40 +00:00
Bryan C. Mills
8f8a8e8921 cmd/go/internal/modload: eliminate QueryPackage
QueryPackage was a wrapper around QueryPattern with extra validation,
called only once from within the same package. Most of that validation
was already performed much earlier, in (*loader).Load. Inline the
remaining validation and remove the needless indirection.

For #36460

Change-Id: I108a01d416197db8f886889554e07b29f0c37f3f
Reviewed-on: https://go-review.googlesource.com/c/go/+/256057
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2020-09-22 20:45:27 +00:00
Tobias Klauser
d140c35744 syscall: use libc-based ioctl for Ioctl in tests on darwin
Direct syscalls are no longer supported on darwin, instead wrap the
existing func ioctl for tests.

Change-Id: Ie2c5b6e5f54e992f4d6b21513ca8f89fcf28ef10
Reviewed-on: https://go-review.googlesource.com/c/go/+/256219
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-09-22 18:05:58 +00:00
Bryan C. Mills
095f66f662 cmd/go/internal/modget: if building packages, only update go.mod if the build succeeds
Fixes #41315

Change-Id: I5b18a0c2d1d72ff556a882e862b95133deb3ef98
Reviewed-on: https://go-review.googlesource.com/c/go/+/255970
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2020-09-22 18:00:04 +00:00
Bryan C. Mills
ea42b771e9 cmd/go/internal/modget: diagnose missing transitive dependencies
For #41315

Change-Id: I3989bcb051ae57dd2d8f89759d241d4cdce49659
Reviewed-on: https://go-review.googlesource.com/c/go/+/255969
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2020-09-22 17:59:55 +00:00
Bryan C. Mills
3aa09489ab cmd/go: add a '-e' flag to 'mod tidy' and 'mod vendor'
This flag, like the -e flag to 'go list', instructs the command to
make a best effort to continue in spite of errors for specific packages.

Fixes #26603

Change-Id: I5ee2f50c71870ae8ef3f9b3e5b045474adcca525
Reviewed-on: https://go-review.googlesource.com/c/go/+/255960
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2020-09-22 17:04:13 +00:00
Bryan C. Mills
4e1d812afc doc/go1.16: add subheads and adjust formatting in the 'Go command' section
Change-Id: I5f70684d4033d8b11e1cce89268d8222ed596c67
Reviewed-on: https://go-review.googlesource.com/c/go/+/256400
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
2020-09-22 16:52:11 +00:00
Bryan C. Mills
fd75989f46 cmd/go/internal/modget: consolidate Load entrypoints
This change replaces ImportPaths, ImportPathsQuiet, LoadALL, and
LoadVendor with a single LoadPackages function, with a LoadOpts struct
that more clearly documents the variations in behavior.

It also eliminates the cmd/go/internal/load.ImportPaths function,
which was undocumented and had only one call site (within its own
package).

The modload.LoadTests global variable is subsumed by a field in the
new LoadOpts struct, and is no longer needed for callers that invoke
LoadPackages directly. It has been (temporarily) replaced with a
similar global variable, load.ModResolveTests, which can itself be
converted to an explicit, local argument.

For #37438
For #36460
Updates #40775
Fixes #26977

Change-Id: I4fb6086c01b04de829d98875db19cf0118d40f8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/255938
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2020-09-22 16:52:00 +00:00
Michael Pratt
d42b32e321 runtime: add sched.lock assertions
Functions that require holding sched.lock now have an assertion.

A few places with missing locks have been fixed in this CL:

Additionally, locking is added around the call to procresize in
schedinit. This doesn't technically need a lock since the program is
still starting (thus no concurrency) when this is called, but lock held
checking doesn't know that.

Updates #40677

Change-Id: I198d3cbaa727f7088e4d55ba8fa989cf1ee8f9cf
Reviewed-on: https://go-review.googlesource.com/c/go/+/250261
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Michael Pratt <mpratt@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2020-09-22 15:14:09 +00:00
Michael Pratt
53c9b9588a runtime: check held locks with staticlockranking
When lock ranking is enabled, we can now assert that lock preconditions
are met by checking that the caller holds required locks on function
entry.

This change adds the infrastructure to add assertions. Actual assertions
will be added for various locks in subsequent changes.

Some functions are protected by locks that are not directly accessible
in the function. In that case, we can use assertRankHeld to check that
any lock with the rank is held. This is less precise, but it avoids
requiring passing the lock into the functions.

Updates #40677

Change-Id: I843c6874867f975e90a063f087b6e2ffc147877b
Reviewed-on: https://go-review.googlesource.com/c/go/+/245484
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Michael Pratt <mpratt@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2020-09-22 15:13:57 +00:00
Tobias Klauser
0d83fe68a8 os: close fd if fd.Stat fails in Getwd
Avoid leaking fd in case fd.Stat() fails in the fall back implementation
of Getwd.

Change-Id: I8656d42e8dbc8893b7159873f173d6bf0d4febe6
Reviewed-on: https://go-review.googlesource.com/c/go/+/256221
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
2020-09-22 13:25:27 +00:00
Cuong Manh Le
754776850a cmd/compile: consistently use typekind when reporting invalid operation
While at it, make "typekind" awares of "types.Ideal*" types.

Passes toolstash-check.

Change-Id: I092fa8c57ab6b8d9ba0f25d8e1ea44fba48675e5
Reviewed-on: https://go-review.googlesource.com/c/go/+/256438
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2020-09-22 07:12:52 +00:00
Cuong Manh Le
23573d0ea2 cmd/compile: clearer error when non-bool used as "||" and "&&" operand
Fixes #41500

Change-Id: I658d8921b7769b6e4288ca781cbdca5ff14a84ee
Reviewed-on: https://go-review.googlesource.com/c/go/+/255899
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2020-09-22 04:13:13 +00:00
Dmitri Shuralyov
8860251db8 all: update vendored dependencies during Go 1.16 development
The Go 1.16 development cycle has started. This is the time to update
all golang.org/x/... module versions that contribute packages to the
std and cmd modules in the standard library to latest master versions.

Those versions have already gone through code review, and now they
will undergo additional testing during the development period.
If there are new issues in these dependencies discovered, we have
development period to deal with that. We will do this update once
more at the end of the development cycle, by the code freeze, and
so doing it now will make that update smaller and safer.

Overall, this change will help us build confidence that the
Go 1.16 release and its selected dependencies will be robust.

Also increment the Go language version to 1.16 in standard library
go.mod files.

This change was created with a program from CL 256357 patch set 1
(which updates golang.org/x modules only) and the bundle tool at
CL 255053 patch set 1:

	$ updatestd -goroot=$HOME/gotip -branch=master
	> go version
	go version devel +eda1d40544 Mon Sep 21 16:50:07 2020 +0000 darwin/amd64
	> go env GOROOT
	/Users/dmitshur/gotip
	> go version -m /Users/dmitshur/go/bin/bundle
	/Users/dmitshur/go/bin/bundle: go1.15.2
		path	golang.org/x/tools/cmd/bundle
		mod	golang.org/x/tools	(devel)	 # CL 255053 PS 1
		dep	golang.org/x/mod	v0.3.0	h1:RM4zey1++hCTbCVQfnWeKs9/IEsaBLA8vTkd0WVtmH4=
		dep	golang.org/x/xerrors	v0.0.0-20200804184101-5ec99f83aff1	h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=

	updating module cmd in /Users/dmitshur/gotip/src/cmd
	skipping github.com/chzyer/logex (out of scope, it's not a golang.org/x dependency)
	skipping github.com/chzyer/readline (out of scope, it's not a golang.org/x dependency)
	skipping github.com/chzyer/test (out of scope, it's not a golang.org/x dependency)
	skipping github.com/google/pprof (out of scope, it's not a golang.org/x dependency)
	skipping github.com/ianlancetaylor/demangle (out of scope, it's not a golang.org/x dependency)
	skipping github.com/yuin/goldmark (out of scope, it's not a golang.org/x dependency)
	skipping rsc.io/pdf (out of scope, it's not a golang.org/x dependency)
	> go mod edit -go=1.16
	> go get -d golang.org/x/arch@b19915210f009e139b20abfd6a6052c7acc1f445 golang.org/x/crypto@5c72a883971a4325f8c62bf07b6d38c20ea47a6a golang.org/x/mod@ce943fd02449f621243c9ea6e64098e84752b92b golang.org/x/net@62affa334b73ec65ed44a326519ac12c421905e3 golang.org/x/sync@6e8e738ad208923de99951fe0b48239bfd864f28 golang.org/x/sys@af09f7315aff1cbc48fb21d21aa55d67b4f914c5 golang.org/x/text@a8b4671254579a87fadf9f7fa577dc7368e9d009 golang.org/x/tools@d647fc2532668b2b75a92f468487b8085e6ed58b golang.org/x/xerrors@5ec99f83aff198f5fbd629d6c8d8eb38a04218ca
	go: golang.org/x/sys af09f7315aff1cbc48fb21d21aa55d67b4f914c5 => v0.0.0-20200918174421-af09f7315aff
	go: golang.org/x/text a8b4671254579a87fadf9f7fa577dc7368e9d009 => v0.3.4-0.20200826142016-a8b467125457
	go: golang.org/x/tools d647fc2532 => v0.0.0-20200918232735-d647fc253266
	go: golang.org/x/net 62affa334b73ec65ed44a326519ac12c421905e3 => v0.0.0-20200904194848-62affa334b73
	go: golang.org/x/crypto 5c72a883971a4325f8c62bf07b6d38c20ea47a6a => v0.0.0-20200820211705-5c72a883971a
	go: golang.org/x/arch b19915210f009e139b20abfd6a6052c7acc1f445 => v0.0.0-20200826200359-b19915210f00
	go: golang.org/x/xerrors 5ec99f83aff198f5fbd629d6c8d8eb38a04218ca => v0.0.0-20200804184101-5ec99f83aff1
	> go mod tidy
	> go mod vendor

	updating module std in /Users/dmitshur/gotip/src
	> go mod edit -go=1.16
	> go get -d golang.org/x/crypto@5c72a883971a4325f8c62bf07b6d38c20ea47a6a golang.org/x/net@62affa334b73ec65ed44a326519ac12c421905e3 golang.org/x/sys@af09f7315aff1cbc48fb21d21aa55d67b4f914c5 golang.org/x/text@a8b4671254579a87fadf9f7fa577dc7368e9d009 golang.org/x/tools@d647fc2532668b2b75a92f468487b8085e6ed58b
	go: golang.org/x/crypto 5c72a883971a4325f8c62bf07b6d38c20ea47a6a => v0.0.0-20200820211705-5c72a883971a
	go: golang.org/x/text a8b4671254579a87fadf9f7fa577dc7368e9d009 => v0.3.4-0.20200826142016-a8b467125457
	go: golang.org/x/sys af09f7315aff1cbc48fb21d21aa55d67b4f914c5 => v0.0.0-20200918174421-af09f7315aff
	go: golang.org/x/tools d647fc2532 => v0.0.0-20200918232735-d647fc253266
	> go mod tidy
	> go mod vendor

	updating bundles in /Users/dmitshur/gotip/src
	> go generate -run=bundle std cmd

Other non-golang.org/x module dependencies (pprof and demangle)
still need to be updated in a future CL.

For #36905.

Change-Id: I83a350bf8714ebc249284c0d69abe4941700565e
Reviewed-on: https://go-review.googlesource.com/c/go/+/255860
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Dmitri Shuralyov <dmitshur@golang.org>
2020-09-21 22:10:00 +00:00
witchard
5853b4ee47 cmd/go/internal/get: warn about -insecure deprecation
Adds deprecation warning for -insecure flag on go get in both modules
and GOPATH mode.

Updates #37519.

Change-Id: Ie2efeeb4a91e6dda92955295969e9715314ae50e
GitHub-Last-Rev: a9ebe21fe0
GitHub-Pull-Request: golang/go#41497
Reviewed-on: https://go-review.googlesource.com/c/go/+/255882
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Trust: Michael Matloob <matloob@golang.org>
Trust: Jay Conrod <jayconrod@google.com>
2020-09-21 21:03:02 +00:00
Dmitry Vyukov
f92c64045f debug/dwarf: speed up SkipChildren for compilation units
For a common pattern of iterating only over top-level compilation units (CU)
Reader.SkipChildren has decode and meterialize all CU subentries just
to skip them, because DW_TAG_compile_unit does not have DW_AT_sibling.
However, CUs have total size encoded before the unit and we already parse them
and know all unit sizes.
Optimize Reader.SkipChildren to use that size when skipping CUs children.

This speeds up iteration over a 1.3GB object file from 7.5s to 0.73s.

Change-Id: I2a8f00955159b4bd13571409f4817805f934cb69
Reviewed-on: https://go-review.googlesource.com/c/go/+/256217
Run-TryBot: Dmitry Vyukov <dvyukov@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Than McIntosh <thanm@google.com>
2020-09-21 20:14:27 +00:00
Jay Conrod
7e9369a517 cmd/link: add go.mod to TestFuncAlign
Fixes #41531

Change-Id: I8b4f0d5b7094e56787998d244d8a4c03becb8452
Reviewed-on: https://go-review.googlesource.com/c/go/+/256302
Trust: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2020-09-21 17:13:40 +00:00
Austin Clements
eda1d40544 make.bash: avoid warning when bootstrap doesn't support GOOS/GOARCH
Currently, if make.bash is run with a GOOS or GOARCH that the
bootstrap toolchain doesn't support, it will print an ominous but
harmless warning like:

  2020/09/21 09:05:27 unsupported GOARCH arm64

This comes from the invocation of "go version" to get the exact
bootstrap toolchain version.

Since the GOOS and GOARCH don't matter for this purpose, this CL
simply clears them on the invocation of the bootstrap toolchain's "go
version".

Fixes #41525.

Change-Id: I17d44eaafed9999b9fa7dcb9fb100b5fd5e554d0
Reviewed-on: https://go-review.googlesource.com/c/go/+/256297
Trust: Austin Clements <austin@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2020-09-21 16:50:07 +00:00
Michael Pratt
02ff8b8ce4 runtime: expand gopark documentation
unlockf is called after the G is put into _Gwaiting, meaning another G
may have readied this one before unlockf is called.

This is implied by the current doc, but add additional notes to call out
this behavior, as it can be quite surprising.

Updates #40641

Change-Id: I60b1ccc6a4dd9ced8ad2aa1f729cb2e973100b59
Reviewed-on: https://go-review.googlesource.com/c/go/+/256058
Trust: Michael Pratt <mpratt@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2020-09-21 15:08:44 +00:00
Michael Anthony Knyszek
eb3c6a93c3 runtime: disable stack shrinking in activeStackChans race window
Currently activeStackChans is set before a goroutine blocks on a channel
operation in an unlockf passed to gopark. The trouble is that the
unlockf is called *after* the G's status is changed, and the G's status
is what is used by a concurrent mark worker (calling suspendG) to
determine that a G has successfully been suspended. In this window
between the status change and unlockf, the mark worker could try to
shrink the G's stack, and in particular observe that activeStackChans is
false. This observation will cause the mark worker to *not* synchronize
with concurrent channel operations when it should, and so updating
pointers in the sudog for the blocked goroutine (which may point to the
goroutine's stack) races with channel operations which may also
manipulate the pointer (read it, dereference it, update it, etc.).

Fix the problem by adding a new atomically-updated flag to the g struct
called parkingOnChan, which is non-zero in the race window above. Then,
in isShrinkStackSafe, check if parkingOnChan is zero. The race is
resolved like so:

* Blocking G sets parkingOnChan, then changes status in gopark.
* Mark worker successfully suspends blocking G.
* If the mark worker observes parkingOnChan is non-zero when checking
  isShrinkStackSafe, then it's not safe to shrink (we're in the race
  window).
* If the mark worker observes parkingOnChan as zero, then because
  the mark worker observed the G status change, it can be sure that
  gopark's unlockf completed, and gp.activeStackChans will be correct.

The risk of this change is low, since although it reduces the number of
places that stack shrinking is allowed, the window here is incredibly
small. Essentially, every place that it might crash now is replaced with
no shrink.

This change adds a test, but the race window is so small that it's hard
to trigger without a well-placed sleep in park_m. Also, this change
fixes stackGrowRecursive in proc_test.go to actually allocate a 128-byte
stack frame. It turns out the compiler was destructuring the "pad" field
and only allocating one uint64 on the stack.

Fixes #40641.

Change-Id: I7dfbe7d460f6972b8956116b137bc13bc24464e8
Reviewed-on: https://go-review.googlesource.com/c/go/+/247050
Run-TryBot: Michael Knyszek <mknyszek@google.com>
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2020-09-21 14:34:33 +00:00
Jay Conrod
b4ea672009 cmd/go: default to GO111MODULE=on
Fixes #41330

Change-Id: Ib66087ac5e1eb827694915f21c32c4d88e1b9a7e
Reviewed-on: https://go-review.googlesource.com/c/go/+/255052
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2020-09-21 01:30:48 +00:00
Paschalis Tsilias
331614c4da runtime: improve error messages after allocating a stack that is too big
In the current implementation, we can observe crashes after calling
debug.SetMaxStack and allocating a stack larger than 4GB since
stackalloc works with 32-bit sizes. To avoid this, we define an upper
limit as the largest feasible point we can grow a stack to and provide a
better error message when we get a stack overflow.

Fixes #41228

Change-Id: I55fb0a824f47ed9fb1fcc2445a4dfd57da9ef8d4
Reviewed-on: https://go-review.googlesource.com/c/go/+/255997
Run-TryBot: Keith Randall <khr@golang.org>
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Reviewed-by: Keith Randall <khr@golang.org>
2020-09-20 09:54:44 +00:00
Ainar Garipov
a3868028ac unicode/utf8: document the handling of runes out of range in EncodeRune
Document the way EncodeRune currently handles runes which are
out of range.  Also add an example showing that behaviour.

Change-Id: I0f8e7645ae053474ec319085a2bb6d7f73bc137c
Reviewed-on: https://go-review.googlesource.com/c/go/+/255998
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Giovanni Bajo <rasky@develer.com>
Trust: Giovanni Bajo <rasky@develer.com>
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2020-09-19 09:43:15 +00:00
surechen
73eb24ccb6 math: Remove redundant local variable Ln2
Use the const variable Ln2 in math/const.go for function acosh.

Change-Id: I5381d03dd3142c227ae5773ece9be6c8f377615e
Reviewed-on: https://go-review.googlesource.com/c/go/+/232517
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Robert Griesemer <gri@golang.org>
Trust: Giovanni Bajo <rasky@develer.com>
2020-09-19 09:09:52 +00:00
Jay Lee
58fe2cd402 time: support colon at start of TZ value
According to POSIX, there are three formats for TZ variable. When
it refers to timezone file, it should starts with a colon. This commit
removes the colon if it exists, so that it keeps compatible with both
the spec and the old behavior.

Change-Id: I30cfeaea530d24e174de309952338cb1146694a5
GitHub-Last-Rev: 11d83d11ca
GitHub-Pull-Request: golang/go#27570
Reviewed-on: https://go-review.googlesource.com/c/go/+/134217
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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2020-09-19 05:19:50 +00:00
Clément Chigot
ccf581f126 go/internal/gccgoimporter: recognize aixbigafMagic archives
Change-Id: I61a13f7d6410e4931efaa20307bdf1cc0037afc0
Reviewed-on: https://go-review.googlesource.com/c/go/+/255200
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
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2020-09-19 05:13:19 +00:00
surechen
09dd2b004a cmd/compile: add type check for ssa genericOps
Change-Id: I2233a6a157ec8feffaefd6a8ee65b1c38778c1cd
Reviewed-on: https://go-review.googlesource.com/c/go/+/255238
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Giovanni Bajo <rasky@develer.com>
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2020-09-18 23:20:52 +00:00
Keith Randall
4c4a376736 runtime/debug: skip fault address test on unsupported platforms
Change-Id: I6a6fe616365fa542218fbc9ff61805ff70a1ef63
Reviewed-on: https://go-review.googlesource.com/c/go/+/255999
Run-TryBot: Keith Randall <khr@golang.org>
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2020-09-18 22:09:45 +00:00
Keith Randall
8925290cf7 reflect: use zero buffer to back the Value returned by Zero
In the common case (<1KB types), no allocation is required
by reflect.Zero.

Also use memclr instead of memmove in Set when the source
is known to be zero.

Fixes #33136

Change-Id: Ic66871930fbb53328032e587153ebd12995ccf55
Reviewed-on: https://go-review.googlesource.com/c/go/+/192331
Trust: Keith Randall <khr@golang.org>
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Reviewed-by: Martin Möhrmann <moehrmann@google.com>
2020-09-18 21:47:28 +00:00
Cherry Zhang
7e54aa2c25 cmd/link: don't mark a symbol's GoType reachable when -linkshared
In CL 231397, we stopped marking symbols' GoType reachable in
general, but not when -linkshared. It was left as a TODO. This CL
addresses it.

The problem was that the type names are mangled in the shared
library, so we need to mangle the name consistently in the
executable as well (regardless of whether the symbol is reachable
or not), so that the GCProg generation code can find the
corresponding symbol from the shared library.

Change-Id: I1040747402929a983ec581109f1681a77893682e
Reviewed-on: https://go-review.googlesource.com/c/go/+/255964
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
2020-09-18 19:41:09 +00:00
Keith Randall
d91d0762c7 runtime/debug: provide Addr method for errors from SetPanicOnFault
When we're building a panic that's triggered by a memory fault when
SetPanicOnFault has been called, include an Addr method. This
method reports the address at which the fault occurred.

Fixes #37023

RELNOTE=yes

Change-Id: Idff144587d6b75070fdc861a36efec76f4ec7384
Reviewed-on: https://go-review.googlesource.com/c/go/+/249677
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Keith Randall <khr@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2020-09-18 17:21:06 +00:00
David Chase
65dfe4a772 cmd/compile: generate late-lowering static calls
This is testing for the limited case of zero or one SSA-able results.

One regression is that the later expansion of "Dereference" into
Move into argument slots thwarts the
  MOVE A -> B, MOVE B -> C
replaced-by
  MOVE A -> B, MOVE A -> C
optimization; the second move is written instead as a Dereference at the
phase where the optimization occurs, and because the target of the
dereference is not visible in the dereference, it's not possible to verify
that A and B or A and C don't overlap in some peculiar way (and for results
fed to args, they can).

Regression is repaired in a later CL by changing when calls are expanded.

Change-Id: Ia0f48a9d483d5a54a99657a24b12b25b8edde55f
Reviewed-on: https://go-review.googlesource.com/c/go/+/242782
Trust: David Chase <drchase@google.com>
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2020-09-18 16:15:57 +00:00
David Chase
44c0586931 cmd/compile: add code to expand calls just before late opt
Still needs to generate the calls that will need lowering.

Change-Id: Ifd4e510193441a5e27c462c1f1d704f07bf6dec3
Reviewed-on: https://go-review.googlesource.com/c/go/+/242359
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
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2020-09-18 16:14:40 +00:00
Jay Conrod
0b71ce6768 cmd/go/internal/modload: don't report path errors when loading retractions
When we load module retractions from the latest version of a module,
it's possible that the latest version has a different module path than
the version we're loading. This can happen when a module is renamed or
a go.mod file is added for the first time.

We should not report an error in this case. Retractions should still
apply to old aliases of a module.

Fixes #41350

Change-Id: If1bc0b6b2b26fc7023e02fc211aa0cd8eb00796e
Reviewed-on: https://go-review.googlesource.com/c/go/+/255961
Trust: Jay Conrod <jayconrod@google.com>
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2020-09-18 16:07:01 +00:00
Cherry Zhang
789d77a87e cmd/link: propagate UsedInIface through method descriptor
The linker prunes methods that are not directly reachable if the
receiver type is never converted to interface. A type can be
converted to interface using reflection through other types.
The linker already takes this into consideration but it missed
the case that the intermediate is a method descriptor. Handle
this case.

Change-Id: I590efc5da163c326db8d43583908a2ef67f65d9d
Reviewed-on: https://go-review.googlesource.com/c/go/+/255858
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
2020-09-18 14:36:22 +00:00
Jay Conrod
bf9800c793 cmd/go: fix review comments in load, modload
Follow-up to CL 255719, fixing review comments.

Change-Id: I26d3cc622496c3902c6924cf2b746c50705c4d50
Reviewed-on: https://go-review.googlesource.com/c/go/+/255937
Trust: Jay Conrod <jayconrod@google.com>
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2020-09-18 13:37:22 +00:00
Bryan C. Mills
c47ba5fbfb cmd/go: test the behavior of 'go get' in module mode with package vs. module arguments
Updates #37438

Change-Id: I5beb380b37532571768a92bea50003f6ff1757e1
Reviewed-on: https://go-review.googlesource.com/c/go/+/255054
Trust: Bryan C. Mills <bcmills@google.com>
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Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
2020-09-18 13:21:42 +00:00
Cuong Manh Le
06f7e655d1 cmd/compile: refactoring mixing untyped type logic
defaultlit2 and typecheck use the same logic for getting mixing untyped
type, so move that logic to a function.

This is a followup of CL 255217.

Passes toolstash-check.

Change-Id: Ic0eadb7ed27a2f0f72e2d28fd5438500bf4c79e0
Reviewed-on: https://go-review.googlesource.com/c/go/+/255897
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
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2020-09-18 07:56:50 +00:00
Cuong Manh Le
df73945fd2 cmd/compile: make error message involving variadic calls clearer
Fixes #41440

Change-Id: I2fbac72ae3b76bca32cdeaee678a19af3595d116
Reviewed-on: https://go-review.googlesource.com/c/go/+/255241
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2020-09-18 07:54:47 +00:00
Cuong Manh Le
4ffc2bc533 cmd/compile: rename retsigerr to sigerr
retsigerr was used to create error message for both wrong function
arguments and return arguments, so change its name to sigerr to reflect
that.

While at it, also add documentation for the wrong function arguments
case.

Passes toolstash-check.

Change-Id: I740c717ad38d4afab9e8c20f2e94579c8bca67ff
Reviewed-on: https://go-review.googlesource.com/c/go/+/255240
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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TryBot-Result: Go Bot <gobot@golang.org>
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2020-09-18 07:54:34 +00:00
Matthew Dempsky
ddd35f8d71 cmd/compile: more comprehensive tests for #24991
The revised test now checks that unsafe-uintptr correctly works for
variadic uintptr parameters too, and the CL corrects the code so this
code compiles again.

The pointers are still not kept alive properly. That will be fixed by
a followup CL. But this CL at least allows programs not affected by
that to build again.

Updates #24991.
Updates #41460.

Change-Id: If4c39167b6055e602213fb7522c4f527c43ebda9
Reviewed-on: https://go-review.googlesource.com/c/go/+/255877
Trust: Matthew Dempsky <mdempsky@google.com>
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2020-09-18 05:12:59 +00:00
root
234e23d763 cmd/compile: make expanded/hidden columns in GOSSAFUNC persist across
reloads

use pushState with updated state and read it on page load,so that state
can survive across reloads.

Change-Id: I6c5e80e9747576245b979a62cb96d231d8f27d57
Reviewed-on: https://go-review.googlesource.com/c/go/+/248687
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bradford Lamson-Scribner <brad.lamson@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Josh Bleecher Snyder <josharian@gmail.com>
2020-09-18 04:16:08 +00:00
root
0b1cec7ad3 cmd/compile: rotate phase's title 180 degrees in ssa/html.go
Modify phase's title according to html.go:122 TODO.

Fixes #41098

Change-Id: I58fa365e718600aaaa0a72cce72d35a484cde8b8
Reviewed-on: https://go-review.googlesource.com/c/go/+/251657
Reviewed-by: Bradford Lamson-Scribner <brad.lamson@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Josh Bleecher Snyder <josharian@gmail.com>
2020-09-18 04:15:47 +00:00