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4 years agotest: match gccgo error messages
Ian Lance Taylor [Thu, 3 Dec 2020 02:13:14 +0000 (18:13 -0800)]
test: match gccgo error messages

assign.go:59:28: error: ‘x’ repeated on left side of :=
assign.go:65:20: error: ‘a’ repeated on left side of :=

method2.go:36:11: error: reference to method ‘val’ in type that is pointer to interface, not interface
method2.go:37:11: error: reference to method ‘val’ in type that is pointer to interface, not interface

Change-Id: I8f385c75a82fae4eacf4618df8f9f65932826494
Reviewed-on: https://go-review.googlesource.com/c/go/+/274447
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
4 years agodoc/go1.16: document embed, io/fs, runtime/metrics
Russ Cox [Thu, 3 Dec 2020 15:31:42 +0000 (10:31 -0500)]
doc/go1.16: document embed, io/fs, runtime/metrics

Fixes #42915.

Change-Id: Ia6e205aaac3cbf4ba7340deafad444ac3e573559
Reviewed-on: https://go-review.googlesource.com/c/go/+/275114
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
4 years agodoc/go1.16: more release notes
Russ Cox [Thu, 3 Dec 2020 15:03:22 +0000 (10:03 -0500)]
doc/go1.16: more release notes

Fixes #42899 (flag).
Fixes #42900 (io).
Fixes #42901 (log).
Fixes #42902 (log/syslog).
Fixes #42903 (mime/multipart).
Fixes #42904 (net).
Fixes #42905 (net/http).
Fixes #42906 (net/http/httputil).
Fixes #42907 (net/smtp).
Fixes #42909 (os/signal).
Fixes #42913 (syscall).

Change-Id: Id09f038751d61fe0f1ff57b525e49473dd75c95f
Reviewed-on: https://go-review.googlesource.com/c/go/+/275113
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
4 years agomime/multipart: handle ReadForm(math.MaxInt64) better
Russ Cox [Thu, 3 Dec 2020 14:45:07 +0000 (09:45 -0500)]
mime/multipart: handle ReadForm(math.MaxInt64) better

Returning an error about integer overflow is needlessly pedantic.
The meaning of ReadForm(MaxInt64) is easily understood
(accept a lot of data) and can be implemented.

Fixes #40430.

Change-Id: I8a522033dd9a2f9ad31dd2ad82cf08d553736ab9
Reviewed-on: https://go-review.googlesource.com/c/go/+/275112
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
4 years agocmd/compile, runtime: use __msan_memmove for moving data, split msanread to fields
Cherry Zhang [Tue, 17 Nov 2020 02:28:26 +0000 (21:28 -0500)]
cmd/compile, runtime: use __msan_memmove for moving data, split msanread to fields

Currently, for data moving, we generate an msanread of the source,
followed by an msanwrite of the destination. msanread checks
the source is initialized.

This has a problem: if the source is an aggregate type containing
alignment paddings, the padding bytes may not be thought as
initialized by MSAN. If we copy the aggregate type by value, if
it counts as a read, MSAN reports using uninitialized data. This
CL changes it to use __msan_memmove for data copying, which tells
MSAN to propagate initialized-ness but not check for it.

Caveat: technically __msan_memmove is not a public API of MSAN,
although the C compiler does generate direct calls to it.

Also, when instrumenting a load of a struct, split the
instrumentation to fields, instead of generating an msanread for
the whole struct. This skips padding bytes, which may not be
considered initialized in MSAN.

Fixes #42820.

Change-Id: Id861c8bbfd94cfcccefcc58eaf9e4eb43b4d85c6
Reviewed-on: https://go-review.googlesource.com/c/go/+/270859
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
4 years agodoc/go1.16: document os package changes
Tobias Klauser [Thu, 3 Dec 2020 10:07:27 +0000 (11:07 +0100)]
doc/go1.16: document os package changes

For #39444
For #40700
Fixes #42908

Change-Id: Idae35adecd79e9d7d207f9d78cb009a980e5c8a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/274477
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Russ Cox <rsc@golang.org>
4 years agodoc/go1.16: document new behavior of asn1.Unmarshal on invalid argument
KimMachineGun [Sun, 29 Nov 2020 08:18:12 +0000 (08:18 +0000)]
doc/go1.16: document new behavior of asn1.Unmarshal on invalid argument

For #41509

Change-Id: Ie761c428710d15848cb80ffd2d85de747113f2d4
GitHub-Last-Rev: 05541624593d945d82b6f4cfae1461654eabea7b
GitHub-Pull-Request: golang/go#42315
Reviewed-on: https://go-review.googlesource.com/c/go/+/267057
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
4 years agodoc/go1.16: add encoding/json note for tag change
Joe Tsai [Tue, 1 Dec 2020 22:59:23 +0000 (14:59 -0800)]
doc/go1.16: add encoding/json note for tag change

For #40700
Fixes #42898

Change-Id: I652657ff8d6cce20bf868f0b1101d723d3f704d1
Reviewed-on: https://go-review.googlesource.com/c/go/+/274614
Trust: Joe Tsai <joetsai@digital-static.net>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
4 years agodoc/go1.16: add crypto/tls Config.Clone note
Roland Shoemaker [Tue, 1 Dec 2020 21:02:44 +0000 (13:02 -0800)]
doc/go1.16: add crypto/tls Config.Clone note

For #40700
Fixes #42896

Change-Id: I842c9d60b18abe2ee061c6705a5c7ba62b224d77
Reviewed-on: https://go-review.googlesource.com/c/go/+/274613
Trust: Roland Shoemaker <roland@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
4 years agogo/parser: ignore subdirectories in ParseDir
Carlos Alexandro Becker [Wed, 2 Dec 2020 21:04:13 +0000 (21:04 +0000)]
go/parser: ignore subdirectories in ParseDir

Issue and PR on GoReleaser:
- https://github.com/goreleaser/goreleaser/issues/1897
- https://github.com/goreleaser/goreleaser/pull/1899

Fixes #42951.

Change-Id: Ia0d6018e0bad59cd60cd600188c368c431032a4b
GitHub-Last-Rev: be59d85fe2d473f4dfd828a244023c4064d6e31f
GitHub-Pull-Request: golang/go#42581
Reviewed-on: https://go-review.googlesource.com/c/go/+/269897
Trust: Robert Griesemer <gri@golang.org>
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
4 years agocrypto/ed25519/internal/edwards25519: fix typo in comments
Filippo Valsorda [Wed, 25 Nov 2020 01:40:32 +0000 (02:40 +0100)]
crypto/ed25519/internal/edwards25519: fix typo in comments

Change-Id: I8133762d53d9e5d3cc13e0f97b9679a3248a7f0f
Reviewed-on: https://go-review.googlesource.com/c/go/+/273087
Trust: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
4 years agocmd/go: fix TestNewReleaseRebuildsStalePackagesInGOPATH
Russ Cox [Wed, 2 Dec 2020 17:56:29 +0000 (12:56 -0500)]
cmd/go: fix TestNewReleaseRebuildsStalePackagesInGOPATH

Broken during CL 267719.

Change-Id: If5acb8231d3053c0e714a79c02cb56eaba6e74e6
Reviewed-on: https://go-review.googlesource.com/c/go/+/274854
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
4 years agocmd/go: stop tests from using network during -short
Russ Cox [Wed, 2 Dec 2020 15:14:53 +0000 (10:14 -0500)]
cmd/go: stop tests from using network during -short

It turned out that "go get" was using the network to look up
https://github.com?go-get=1 while resolving github.com/google/go-cmp,
and that is not the fastest page to load.
Stop that lookup by adjusting the path prefixes in the vcs table.

It also turned out that "go get" was using the network to look up
https://rsc.io?go-get=1 while resolving https://rsc.io/nonexist.svn.
That's a bit more defensible maybe, since rsc.io is not a known VCS host.
But for tests we really want to avoid the network entirely, so this CL
adds a special case in repoRootFromVCSPaths that returns a hard error
for plain "rsc.io" instead of doing the web fetch.

To keep us honest in the future, I added two automatically-set env
variables TESTGONETWORK=panic and TESTGOVCS=panic.
These cause the go command to panic rather than make a network request
or invoke a VCS command.

go test -short cmd/go now passes with these checks.

This reduced the time spent in go test -short cmd/go on my
Google workstation from 154s to 30s. (Yay network firewalls.)

Change-Id: I49207fca7f901fa011765fb984dc9cec8b691f11
Reviewed-on: https://go-review.googlesource.com/c/go/+/274441
Trust: Russ Cox <rsc@golang.org>
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
4 years agoos: add ReadFile, WriteFile, CreateTemp (was TempFile), MkdirTemp (was TempDir) from...
Russ Cox [Thu, 29 Oct 2020 17:51:20 +0000 (13:51 -0400)]
os: add ReadFile, WriteFile, CreateTemp (was TempFile), MkdirTemp (was TempDir) from io/ioutil

io/ioutil was a poorly defined collection of helpers.
Proposal #40025 moved out the generic I/O helpers to io.
This CL for proposal #42026 moves the OS-specific helpers to os,
making the entire io/ioutil package deprecated.

For #42026.

Change-Id: I018bcb2115ef2ff1bc7ca36a9247eda429af21ad
Reviewed-on: https://go-review.googlesource.com/c/go/+/266364
Trust: Russ Cox <rsc@golang.org>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
4 years agodoc: update signal.Notify example to use buffered channel
Cuong Manh Le [Tue, 1 Dec 2020 15:23:42 +0000 (22:23 +0700)]
doc: update signal.Notify example to use buffered channel

This if follow up of CL 274332.

Updates #9399.

Change-Id: Ic6dd534dc18227a799cbb9577979f2285596b825
Reviewed-on: https://go-review.googlesource.com/c/go/+/274393
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: Ian Lance Taylor <iant@golang.org>
4 years agocmd/go: fix unbuffered channel passed to signal.Notify
Cuong Manh Le [Tue, 1 Dec 2020 05:54:24 +0000 (12:54 +0700)]
cmd/go: fix unbuffered channel passed to signal.Notify

Unbuffered channels passed into signal.Notify can be lost
as the docs for signal.Notify caution with:

    Package signal will not block sending to c: the caller must ensure
    that c has sufficient buffer space to keep up with the expected signal
    rate. For a channel used for notification of just one signal value,
    a buffer of size 1 is sufficient.

Found by a static analyzer from Orijtech, Inc. called "sigchanyzer", but
it'll be donated to the Go project soon.

Updates #9399.

Change-Id: Ia0690e447582da028694ed65ace7b97961997b84
Reviewed-on: https://go-review.googlesource.com/c/go/+/274332
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agoall: update to use filepath.WalkDir instead of filepath.Walk
Russ Cox [Wed, 4 Nov 2020 23:20:17 +0000 (18:20 -0500)]
all: update to use filepath.WalkDir instead of filepath.Walk

Now that filepath.WalkDir is available, it is more efficient
and should be used in place of filepath.Walk.
Update the tree to reflect best practices.

As usual, the code compiled with Go 1.4 during bootstrap is excluded.
(In this CL, that's only cmd/dist.)

For #42027.

Change-Id: Ib0f7b1e43e50b789052f9835a63ced701d8c411c
Reviewed-on: https://go-review.googlesource.com/c/go/+/267719
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
4 years agocmd/asm, cmd/internal/obj/riscv: fix branch pseudo-instructions
Quey-Liang Kao [Sat, 21 Nov 2020 14:48:55 +0000 (22:48 +0800)]
cmd/asm, cmd/internal/obj/riscv: fix branch pseudo-instructions

Pseudo branch instructions BGT, BGTU, BLE, and BLEU implemented In
CL 226397 were translated inconsistently compared to other ones due
to the inversion of registers. For instance, while "BLT a, b" generates
"jump if a < b", "BLE a, b" generates "jump if b <= a."

This CL fixes the translation in the assembler and the tests.

Change-Id: Ia757be73e848734ca5b3a790e081f7c4f98c30f2
Reviewed-on: https://go-review.googlesource.com/c/go/+/271911
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Joel Sing <joel@sing.id.au>
Run-TryBot: Joel Sing <joel@sing.id.au>

4 years agotest: match gofrontend error messages
Ian Lance Taylor [Wed, 2 Dec 2020 02:14:40 +0000 (18:14 -0800)]
test: match gofrontend error messages

The gofrontend code doesn't distinguish semicolon and newline,
and it doesn't have special treatment for EOF.

syntax/semi6.go:9:47: error: unexpected semicolon or newline in type declaration
syntax/semi6.go:11:62: error: unexpected semicolon or newline in type declaration

Change-Id: I9996b59a4fc78ad1935e779f354ddf75c0fb44e0
Reviewed-on: https://go-review.googlesource.com/c/go/+/274692
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agocmd/link: invalidate kernel cache on darwin
Cherry Zhang [Sun, 22 Nov 2020 16:43:29 +0000 (11:43 -0500)]
cmd/link: invalidate kernel cache on darwin

Apparently, the darwin kernel may cache the code signature at
mmap. When we mmap the output buffer, it doesn't have a code
signature (as we haven't generated one). Invalidate the kernel
cache after writing the file.

See https://github.com/golang/go/issues/42684#issuecomment-731704900
for more information.

Updates #38485.
Fixes #42684.

Change-Id: Iac2ef756ca1454c856944423e5040b8e17a6b420
Reviewed-on: https://go-review.googlesource.com/c/go/+/272258
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
4 years agocmd/internal/buildid: update Mach-O code signature when rewriting buildid
Cherry Zhang [Sun, 22 Nov 2020 02:24:57 +0000 (21:24 -0500)]
cmd/internal/buildid: update Mach-O code signature when rewriting buildid

As the code signature contains hashes of the entire file (except
the signature itself), rewriting buildid will invalidate the
signature. This CL makes it regenerate the signature when
rewriting the buildid. It only does it when the file already has
a code signature, with proper size (darwin/arm64 binaries
generated by the Go linker should have).

Updates #38485, #42684.

Change-Id: I082d9e5808b0ee6a35f9c362d7262aadd9113c81
Reviewed-on: https://go-review.googlesource.com/c/go/+/272257
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
4 years agocmd/link: code-sign on darwin/arm64
Cherry Zhang [Sun, 22 Nov 2020 01:11:03 +0000 (20:11 -0500)]
cmd/link: code-sign on darwin/arm64

This CL lets the linker code-sign output binaries on
darwin/arm64, as the kernel requires binaries must be signed in
order to run.

This signature will likely be invalidated when we stamp the
buildid after linking. We still do it in the linker, for
- plain "go tool link" works.
- the linker generates the LC_CODE_SIGNATURE load command with
  the right size and offset, so we don't need to update it when
  stamping the buildid.

Updates #38485, #42684.

Change-Id: Ia306328906d73217221ba31093fe61a935a46122
Reviewed-on: https://go-review.googlesource.com/c/go/+/272256
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
4 years agocmd/compile: do not assume TST and TEQ set V on arm
Jason A. Donenfeld [Mon, 30 Nov 2020 09:41:46 +0000 (10:41 +0100)]
cmd/compile: do not assume TST and TEQ set V on arm

These replacement rules assume that TST and TEQ set V. But TST and
TEQ do not set V. This is a problem because instructions like LT are
actually checking for N!=V. But with TST and TEQ not setting V, LT
doesn't do anything meaningful. It's possible to construct trivial
miscompilations from this, such as:

    package main

    var x = [4]int32{-0x7fffffff, 0x7fffffff, 2, 4}

    func main() {
        if x[0] > x[1] {
            panic("fail 1")
        }
        if x[2]&x[3] < 0 {
            panic("fail 2") // Fails here
        }
    }

That first comparison sets V, via the CMP that subtracts the values
causing the overflow. Then the second comparison operation thinks that
it uses the result of TST, when it actually uses the V from CMP.

Before this fix:

    TST             R0, R1
    BLT             loc_6C164

After this fix:

    TST             R0, R1
    BMI             loc_6C164

The BMI instruction checks the N flag, which TST sets.  This commit
fixes the issue by using [LG][TE]noov instead of vanilla [LG][TE], and
also adds a test case for the direct issue.

Fixes #42876.

Change-Id: I13c62c88d18574247ad002b671b38d2d0b0fc6fa
Reviewed-on: https://go-review.googlesource.com/c/go/+/274026
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>

4 years agoencoding/json: revert "add "json: " prefix to SyntaxError messages"
Kevin Burke [Fri, 27 Nov 2020 21:55:27 +0000 (13:55 -0800)]
encoding/json: revert "add "json: " prefix to SyntaxError messages"

This reverts commit 6af088bfc66c13143c9ef46b4cf0805df77a8fbe.

Reason for revert: Broke many tests inside Google which implies many
tests were broken outside of Google as well. The tests may be brittle
but still would require work to change and it's not clear it's worth
the benefit.

Updates #36221
Fixes #42675

Change-Id: Id3a14eb37e7119f5abe50e80dfbf120fdc44db72
Reviewed-on: https://go-review.googlesource.com/c/go/+/273747
Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
Trust: Joe Tsai <thebrokentoaster@gmail.com>

4 years agocmd/internal/buildid: exclude Mach-O code signature in hash calculation
Cherry Zhang [Sat, 21 Nov 2020 22:43:16 +0000 (17:43 -0500)]
cmd/internal/buildid: exclude Mach-O code signature in hash calculation

The code signature contains hashes of the entire file (except the
signature itself), including the buildid. Therefore, the buildid
cannot depend on the signature. Otherwise updating buildid will
invalidate the signature, and vice versa. As we cannot change the
code-signing algorithm, we can only change buildid calculation.

This CL changes the buildid calculation to exclude the Mach-O
code signature. So updating code signature after stamping the
buildid will not invalidate the buildid.

Updates #38485, #42684.

Change-Id: I8a9e2e25ca9dc00d9556d13b81652f43bbf6a084
Reviewed-on: https://go-review.googlesource.com/c/go/+/272255
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
4 years agocmd/internal/codesign: new package
Cherry Zhang [Sun, 22 Nov 2020 02:33:18 +0000 (21:33 -0500)]
cmd/internal/codesign: new package

On macOS/ARM64, the kernel requires that binaries must have a
valid code signature to run. The C toolchain code-signs the
binary at link time. We do the same.

It is more subtle for Go because we stamp the buildid after
linking. As the signature contains hashes of the entire file
(except the signature itself), we must (re)generate the signature
after stamping the buildid.

This CL adds a new codesign package, which provides
functionality to generate the code signature. It is a separate
internal package so it can be used both in the linker and by the
go command. The next CLs will add code-signing to the linker and
the go command.

Updates #38485, #42684.

Change-Id: Id46801a6665beebaab0eb413ff2e64c5b9467059
Reviewed-on: https://go-review.googlesource.com/c/go/+/272254
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
4 years agocmd: update golang.org/x/mod to v0.4.0
Jay Conrod [Tue, 1 Dec 2020 20:10:03 +0000 (15:10 -0500)]
cmd: update golang.org/x/mod to v0.4.0

CL 269357 is the only difference between the pseudo-version we were
using and v0.4.0.

Change-Id: If15326bda51e04b47130429b818bfe2facaee03d
Reviewed-on: https://go-review.googlesource.com/c/go/+/274593
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agocmd/go: don't print deprecation notice for 'go get exe'
Jay Conrod [Tue, 1 Dec 2020 18:51:17 +0000 (13:51 -0500)]
cmd/go: don't print deprecation notice for 'go get exe'

It's difficult for module authors to provide installation instructions
that work in both Go 1.15 and 1.16. We'll wait until 1.17 to print a
deprecation warning for installing executables with 'go get'.

Fixes #42885

Change-Id: I835b447e83e760f48fd664e8a117749e0cb59f83
Reviewed-on: https://go-review.googlesource.com/c/go/+/274552
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agonet/http: allow upgrading non keepalive connections
Anmol Sethi [Sat, 24 Oct 2020 00:40:41 +0000 (00:40 +0000)]
net/http: allow upgrading non keepalive connections

If one was using http.Transport with DisableKeepAlives and trying
to upgrade a connection against net/http's Server, the Server
would not allow a "Connection: Upgrade" header to be written
and instead override it to "Connection: Close" which would
break the handshake.

This change ensures net/http's Server does not override the
connection header for successful protocol switch responses.

Fixes #36381.

Change-Id: I882aad8539e6c87ff5f37c20e20b3a7fa1a30357
GitHub-Last-Rev: dc0de83201dc26236527b68bd49dffc53dd0389b
GitHub-Pull-Request: golang/go#36382
Reviewed-on: https://go-review.googlesource.com/c/go/+/213277
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
4 years agonet/http: ignore connection closes once done with the connection
Michael Fraenkel [Sat, 26 Sep 2020 15:20:16 +0000 (09:20 -0600)]
net/http: ignore connection closes once done with the connection

Once the connection is put back into the idle pool, the request should
not take any action if the connection is closed.

Fixes #41600

Change-Id: I5e4ddcdc03cd44f5197ecfbe324638604961de84
Reviewed-on: https://go-review.googlesource.com/c/go/+/257818
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Trust: Damien Neil <dneil@google.com>

4 years agodoc/go1.16: add runtime/debug changes to release notes
Alberto Donizetti [Tue, 1 Dec 2020 13:03:54 +0000 (14:03 +0100)]
doc/go1.16: add runtime/debug changes to release notes

For #40700
Fixes #42912

Change-Id: Ifd36950136db1fc93a8de76a2717a473210418b1
Reviewed-on: https://go-review.googlesource.com/c/go/+/274473
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
4 years agodoc/go1.16: add text/template changes to release notes
Alberto Donizetti [Tue, 1 Dec 2020 12:54:53 +0000 (13:54 +0100)]
doc/go1.16: add text/template changes to release notes

For #40700
Fixes #42914

Change-Id: I673d86a946c362e28bfbf35fab2c60ebfbd8bda2
Reviewed-on: https://go-review.googlesource.com/c/go/+/274472
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
4 years agodoc/go1.16: add multiple release notes for the go command
Jay Conrod [Tue, 1 Dec 2020 16:10:40 +0000 (11:10 -0500)]
doc/go1.16: add multiple release notes for the go command

Added notes for:

* go test -c and -i flags used with unknown flags
* GO111MODULE=on by default
* GOVCS
* Dropped requirements on excluded versions

Removed TODOs for documentation on the retract directive and
'go install pkg@version'. These pages will be written after the beta.

Change-Id: Ic9877a62f908be177a6035a039b72e969e7b7f22
Reviewed-on: https://go-review.googlesource.com/c/go/+/274438
Trust: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agocmd/internal/obj/riscv: add tests for BGE/BGEU/BLT/BLTU
Joel Sing [Sun, 22 Nov 2020 00:52:55 +0000 (11:52 +1100)]
cmd/internal/obj/riscv: add tests for BGE/BGEU/BLT/BLTU

Add tests for BGE/BGEU/BLT/BLTU branch instructions. Also add pure Go variants
of these to ensure that the test data, Go and assembly all match up.

Change-Id: I84c68605e116a4e57f6c5c765bf0aaecab84b675
Reviewed-on: https://go-review.googlesource.com/c/go/+/271913
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Quey-Liang Kao <s101062801@m101.nthu.edu.tw>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agocmd/link/internal/amd64: always generate R_X86_64_PLT32 for SDYNIMPORT calls
Joel Sing [Thu, 26 Nov 2020 15:06:08 +0000 (02:06 +1100)]
cmd/link/internal/amd64: always generate R_X86_64_PLT32 for SDYNIMPORT calls

Currently, in the non-DynlinkingGo case with external linking, we generate a
R_X86_64_GOTPCREL relocation for the imported symbol. This results in the
external linker turning this into a R_X86_64_GLOB_DAT relocation, rather
than a R_X86_64_JUMP_SLOT. Always generate R_X86_64_PLT32 for SDYNIMPORT
calls so that these calls work correctly.

Update #36435
Fixes #42671

Change-Id: I8a28884b7853cb4135053ed817bedc919482f4ad
Reviewed-on: https://go-review.googlesource.com/c/go/+/270377
Trust: Joel Sing <joel@sing.id.au>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
4 years agodoc/go1.16: add crypto/x509 note about Verify on Windows
Roland Shoemaker [Tue, 1 Dec 2020 00:32:41 +0000 (16:32 -0800)]
doc/go1.16: add crypto/x509 note about Verify on Windows

Updates #42897

Change-Id: Ice25922475405aca3cf2cb1c163462f223ede736
Reviewed-on: https://go-review.googlesource.com/c/go/+/274239
Trust: Roland Shoemaker <roland@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
4 years agocmd/compile: do not mark OpSP, OpSB pos for debugging
Cuong Manh Le [Thu, 26 Nov 2020 16:28:11 +0000 (23:28 +0700)]
cmd/compile: do not mark OpSP, OpSB pos for debugging

Fixes #42801

Change-Id: I2080ecacc109479f5820035401ce2b26d72e2ef2
Reviewed-on: https://go-review.googlesource.com/c/go/+/273506
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: Cherry Zhang <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
4 years agoruntime: mlock signal stack on macOS/ARM64
Cherry Zhang [Fri, 27 Nov 2020 05:42:41 +0000 (00:42 -0500)]
runtime: mlock signal stack on macOS/ARM64

Apparently, the macOS ARM64 kernel has a bug where when a signal
arrives and the signal stack is not currently faulted in, it may
kill the program with a SIGILL. Work around it by mlock the
signal stacks.

Fixes #42774.

Change-Id: I99a4b3fdb6d8af1c945725ddc2c25568d81c510a
Reviewed-on: https://go-review.googlesource.com/c/go/+/273686
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agocmd/go: fix infinite loop in modload.keepSums
Jay Conrod [Mon, 30 Nov 2020 20:46:33 +0000 (15:46 -0500)]
cmd/go: fix infinite loop in modload.keepSums

Fixes #42891

Change-Id: I0cce4204a1c4959b896188a2ab3719c0507f95e6
Reviewed-on: https://go-review.googlesource.com/c/go/+/274172
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Jay Conrod <jayconrod@google.com>

4 years agonet: add note about disabling loopback in ListenMulticastUDP()
Andy Pan [Sat, 21 Nov 2020 06:48:26 +0000 (14:48 +0800)]
net: add note about disabling loopback in ListenMulticastUDP()

Fixes #41752

Change-Id: I83520d2303e5fd2e5f6329f092b40e73c13771a1
Reviewed-on: https://go-review.googlesource.com/c/go/+/271908
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Dmitri Shuralyov <dmitshur@golang.org>

4 years agocmd/go: remove trailing whitespace from test script
Daniel Martí [Mon, 23 Nov 2020 05:47:51 +0000 (05:47 +0000)]
cmd/go: remove trailing whitespace from test script

Noticed while skimming through recent master commits.

Change-Id: I42a99ea7d71c05fc5b6107627105375a21920f5e
Reviewed-on: https://go-review.googlesource.com/c/go/+/271990
Trust: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agotest: update gofrontend expected errors
Ian Lance Taylor [Sun, 29 Nov 2020 03:10:57 +0000 (19:10 -0800)]
test: update gofrontend expected errors

This matches the error messages after CL 273890.

syntax/semi4.go:11:9: error: unexpected semicolon or newline, expecting ‘{’ after for clause
syntax/semi4.go:10:13: error: reference to undefined name ‘x’
syntax/semi4.go:12:17: error: reference to undefined name ‘z’

Change-Id: Ic88ff6e27d50bf70f5b2114383b84c42c0682f39
Reviewed-on: https://go-review.googlesource.com/c/go/+/273891
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
4 years agotest: recognize gofrontend error messages
Ian Lance Taylor [Sun, 29 Nov 2020 02:14:38 +0000 (18:14 -0800)]
test: recognize gofrontend error messages

shift1.go:76:16: error: shift of non-integer operand
shift1.go:77:16: error: shift of non-integer operand

Change-Id: I48584c0b01f9f6912a93b5f9bba55b5803fbeced
Reviewed-on: https://go-review.googlesource.com/c/go/+/273888
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
4 years agotest: recognize new gofrontend error message
Ian Lance Taylor [Sun, 29 Nov 2020 01:51:18 +0000 (17:51 -0800)]
test: recognize new gofrontend error message

As of https://golang.org/cl/273886:

fixedbugs/bug340.go:15:18: error: reference to method ‘x’ in interface with no methods

For golang/go#10700

Change-Id: Id29eb0e34bbb524117614229c4c27cfd17dae286
Reviewed-on: https://go-review.googlesource.com/c/go/+/273887
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
4 years agoos: return proper user directories on iOS
Chris Waldon [Sun, 29 Nov 2020 23:58:29 +0000 (23:58 +0000)]
os: return proper user directories on iOS

Separating iOS into its own runtime constant broke the logic
here to derive the correct home, cache, and config directories
on iOS devices.

Fixes #42878

Change-Id: Ie4ff57895fcc34b0a9af45554ea3a346447d2e7a
GitHub-Last-Rev: 5e74e64917fa46e9c6e0d963cab5194ab89e2f64
GitHub-Pull-Request: golang/go#42879
Reviewed-on: https://go-review.googlesource.com/c/go/+/273947
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>

4 years agoruntime: gofmt
KimMachineGun [Fri, 20 Nov 2020 08:32:06 +0000 (08:32 +0000)]
runtime: gofmt

CL 268578 was not formatted properly.

Change-Id: I08d2fc691e4f90a38d8165344c135b7b4f73b339
GitHub-Last-Rev: 6183bb063962ef4bf5a6050c1f5108976108ff42
GitHub-Pull-Request: golang/go#42736
Reviewed-on: https://go-review.googlesource.com/c/go/+/271807
Reviewed-by: Alberto Donizetti <alb.donizetti@gmail.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Trust: Michael Pratt <mpratt@google.com>
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Run-TryBot: Michael Pratt <mpratt@google.com>

4 years agoos/exec: constrain thread usage in leaked descriptor test on illumos
Joshua M. Clulow [Mon, 30 Nov 2020 01:18:51 +0000 (17:18 -0800)]
os/exec: constrain thread usage in leaked descriptor test on illumos

On illumos systems, libc can under some conditions make use of files
from /proc.  In the case of this test, the creation of new threads was
(in the target thread) causing libc to open and close
"/proc/self/lwp/5/lwpname" to set the thread name, which raced with the
leaking descriptor check (see detailed analysis in #42431).

This change requests that the Go runtime use less threads in the child
process used to check for leaked descriptors, without just disabling the
test.  After a thousand repeated trials, the test no longer fails on
illumos.

Fixes #42431.

Change-Id: Iefda26134fc91f7cb205754676e9845d9b7205cc
Reviewed-on: https://go-review.googlesource.com/c/go/+/273966
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agoruntime/pprof: ignore test failures on windows/arm
Jason A. Donenfeld [Sat, 28 Nov 2020 13:38:29 +0000 (14:38 +0100)]
runtime/pprof: ignore test failures on windows/arm

This is blocking forward progress of the de-bitrotting work, and I don't
know off hand how to fix this. Seeing as its disabled on other
platforms, I suspect pprof might not be a very reliable feature, so just
allow for the tests to fail for now, until somebody more motivated comes
along to fix it.

Updates #42862.

Change-Id: Ibc5cd1d82d97b9c2f887d7f3565f2fa70207c8b0
Reviewed-on: https://go-review.googlesource.com/c/go/+/273826
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>

4 years agobufio: make string(int) conversion safer
smasher164 [Thu, 26 Nov 2020 19:16:33 +0000 (14:16 -0500)]
bufio: make string(int) conversion safer

Updates #42792.

Change-Id: I7e53426c41e5609d9dadceb300f7983ba7ad6577
Reviewed-on: https://go-review.googlesource.com/c/go/+/273526
Run-TryBot: Akhil Indurti <aindurti@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
4 years agotest: match gofrontend error messages
Ian Lance Taylor [Thu, 26 Nov 2020 20:26:02 +0000 (12:26 -0800)]
test: match gofrontend error messages

These changes match the following gofrontend error messages:

blank1.go:16:1: error: may not define methods on non-local type

chan/perm.go:28:9: error: expected channel
chan/perm.go:29:11: error: left operand of ‘<-’ must be channel
chan/perm.go:69:9: error: argument must be channel

complit1.go:25:16: error: attempt to slice object that is not array, slice, or string
complit1.go:26:16: error: attempt to slice object that is not array, slice, or string
complit1.go:27:17: error: attempt to slice object that is not array, slice, or string
complit1.go:49:41: error: may only omit types within composite literals of slice, array, or map type
complit1.go:50:14: error: expected struct, slice, array, or map type for composite literal

convlit.go:24:9: error: invalid type conversion (cannot use type unsafe.Pointer as type string)
convlit.go:25:9: error: invalid type conversion (cannot use type unsafe.Pointer as type float64)
convlit.go:26:9: error: invalid type conversion (cannot use type unsafe.Pointer as type int)

ddd1.go:63:9: error: invalid use of ‘...’ calling non-variadic function

fixedbugs/bug176.go:12:18: error: index expression is not integer constant

fixedbugs/bug332.go:17:10: error: use of undefined type ‘T’

fixedbugs/issue4232.go:22:16: error: integer constant overflow
fixedbugs/issue4232.go:33:16: error: integer constant overflow
fixedbugs/issue4232.go:44:25: error: integer constant overflow
fixedbugs/issue4232.go:55:16: error: integer constant overflow

fixedbugs/issue4458.go:19:14: error: type has no method ‘foo’

fixedbugs/issue5172.go:24:14: error: too many expressions for struct

init.go:17:9: error: reference to undefined name ‘runtime’

initializerr.go:26:29: error: duplicate value for index 1

interface/explicit.go:60:14: error: type assertion only valid for interface types

label.go:64:9: error: reference to undefined label ‘go2’

label1.go:18:97: error: continue statement not within for
label1.go:22:97: error: continue statement not within for
label1.go:106:89: error: continue statement not within for
label1.go:108:26: error: invalid continue label ‘on’
label1.go:111:118: error: break statement not within for or switch or select
label1.go:113:23: error: invalid break label ‘dance’

map1.go:64:9: error: not enough arguments
map1.go:65:9: error: not enough arguments
map1.go:67:9: error: argument 1 must be a map

method2.go:36:11: error: reference to undefined field or method ‘val’
method2.go:37:11: error: reference to undefined field or method ‘val’
method2.go:41:12: error: method requires pointer (use ‘(*T).g’)

syntax/chan1.go:13:19: error: send statement used as value; use select for non-blocking send
syntax/chan1.go:17:11: error: send statement used as value; use select for non-blocking send

Change-Id: I98047b60a376e3d2788836300f7fcac3f2c285cb
Reviewed-on: https://go-review.googlesource.com/c/go/+/273527
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
4 years agocmd/link: mark windows/arm as all PIE
Jason A. Donenfeld [Thu, 26 Nov 2020 21:38:45 +0000 (22:38 +0100)]
cmd/link: mark windows/arm as all PIE

If the linker thinks that it's in exe mode instead of pie mode, it
won't emit relocations when generating the pcln table, and we wind
up with crashes like this on windows/arm, where all binaries are
in fact relocated:

    Building Go toolchain2 using go_bootstrap and Go toolchain1.
    fatal error: minpc or maxpc invalid
    runtime: panic before malloc heap initialized

This problem was already solved by darwin/arm64, so solve it the same
way here for windows/arm.

Fixes CL 228478.
Fixes #42786.

Change-Id: I6d1db6907c131183649fc263ccca06783188f344
Reviewed-on: https://go-review.googlesource.com/c/go/+/273566
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Trust: Alex Brainman <alex.brainman@gmail.com>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>

4 years agoruntime: adjust address calculation in identifying abort on windows/arm
Jason A. Donenfeld [Fri, 27 Nov 2020 21:07:23 +0000 (22:07 +0100)]
runtime: adjust address calculation in identifying abort on windows/arm

Apparently we're being called on arm 1 byte off, just like on 386 and
amd64, so unify the handler for isAbortPC.

Fixes #42859.
Updates #29050.

Change-Id: I97fffeb4a33d93ca3397ce1c9ba2b05137f391ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/273727
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Trust: Alex Brainman <alex.brainman@gmail.com>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>

4 years agoruntime: return 0 from C function in test
Jason A. Donenfeld [Fri, 27 Nov 2020 19:45:15 +0000 (20:45 +0100)]
runtime: return 0 from C function in test

This function's prototype includes a return value, so return a value.
Otherwise clang gets upset:

    --- FAIL: TestDLLPreloadMitigation (1.40s)
        syscall_windows_test.go:986: failed to build dll: exit status 1 - nojack.c:7:1: error: non-void function does not return a value [-Werror,-Wreturn-type]
            }
            ^
            1 error generated.

Fixes #42860.

Change-Id: I65b8eb9ccb502692c5b65bd34829f331cd86eef0
Reviewed-on: https://go-review.googlesource.com/c/go/+/273726
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
4 years agolog: make Default doc comment consistent with package doc
Rodolfo Carvalho [Thu, 26 Nov 2020 16:01:35 +0000 (17:01 +0100)]
log: make Default doc comment consistent with package doc

None of the other, older, doc comments use the '*Logger' form, and while
'Logger' and 'logger' are both used in the package doc comment, the
common term used with the intended meaning is 'standard logger', which
appears another eleven times in doc comments.

Change-Id: I089103198fc82390517615eb27bbe7ef77107d34
Reviewed-on: https://go-review.googlesource.com/c/go/+/273486
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Ian Lance Taylor <iant@golang.org>

4 years agoreflect: fix Value.Convert for int-to-string conversions (regression)
Robert Griesemer [Wed, 25 Nov 2020 21:47:42 +0000 (13:47 -0800)]
reflect: fix Value.Convert for int-to-string conversions (regression)

The bug was introduced by https://golang.org/cl/220844.

Updates #42792.
Fixes #42835.

Change-Id: I03065c7526488aded35ef2f800b7162e1606877a
Reviewed-on: https://go-review.googlesource.com/c/go/+/273326
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
4 years agodoc/go1.16: consolidate stdlib changes in "Minor changes" section
Dmitri Shuralyov [Wed, 25 Nov 2020 19:07:30 +0000 (14:07 -0500)]
doc/go1.16: consolidate stdlib changes in "Minor changes" section

Many of the standard library changes that were added before CL 272871
ended up in the "Core library" section. That section is meant for
major changes like new packages, and most of these aren't.

Consolidate all changes in the "Minor changes to the library" section
for now, so that it's easier to get a complete picture of changes for
each package, along with the remaining TODOs. Add a TODO to read them
over at the end and factor out items that are worth highlighting.

Apply minor other fixups to improve consistency.

For #40700.

Change-Id: I7dc2e7ebf2ea3385fce0c207bae4ce467998a717
Reviewed-on: https://go-review.googlesource.com/c/go/+/273267
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agocmd/dist: restore GOARM=7 default for android/arm
Elias Naur [Wed, 25 Nov 2020 18:12:13 +0000 (19:12 +0100)]
cmd/dist: restore GOARM=7 default for android/arm

Fixes the android/arm builder. Without it, the builder reported
unexpected stale targets during bootstrap:

https://build.golang.org/log/b951f1171be54cf4a12c2a0720ffaf07f8a11377

Tighten the GOARM=7 default in cmd/internal/objabi while here.

Change-Id: I944744910193e72e91bc37b5bf0783076b45e579
Reviewed-on: https://go-review.googlesource.com/c/go/+/273167
Run-TryBot: Elias Naur <mail@eliasnaur.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Elias Naur <mail@eliasnaur.com>

4 years agodoc/go1.16: add time/tzdata release note for CL 261877
Tobias Klauser [Wed, 25 Nov 2020 11:57:38 +0000 (12:57 +0100)]
doc/go1.16: add time/tzdata release note for CL 261877

For #40700

Change-Id: I056cef20a5f071977d0ae589c7a50d5f69af3283
Reviewed-on: https://go-review.googlesource.com/c/go/+/273166
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
4 years agocmd/internal/objabi: assume GOARM=7 on Android
Elias Naur [Tue, 24 Nov 2020 16:48:38 +0000 (17:48 +0100)]
cmd/internal/objabi: assume GOARM=7 on Android

CL 34641 changed the Go runtime to assume GOARM=7 support on Android.
This change completes that by assuming GOARM=7 in the toolchain, fixing
the gotcha of inexplicably slow performance on non-arm64 Android devices.

There is already code in cmd/dist to force GOARM to 7 on GOOS=android. However,
dist is most likely run with GOOS != android.

Change-Id: I5e2bf11c3ecd0f6c193229eaa8ddc570722799d1
Reviewed-on: https://go-review.googlesource.com/c/go/+/272846
Run-TryBot: Elias Naur <mail@eliasnaur.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Trust: Elias Naur <mail@eliasnaur.com>

4 years agoruntime: check channel's elemsize before calling race detector
Daniel S Fava [Fri, 20 Nov 2020 20:23:45 +0000 (21:23 +0100)]
runtime: check channel's elemsize before calling race detector

When c.elemsize==0 we call raceacquire() and racerelease()
as opposed to calling racereleaseacquire()

The reason for this change is that, when elemsize==0, we don't
allocate a full buffer for the channel.  Instead of individual
buffer entries, the race detector uses the c.buf as the only
buffer entry.  This simplification prevents us following the
memory model's happens-before rules implemented in racereleaseacquire().
So, instead of calling racereleaseacquire(), we accumulate
happens-before information in the synchronization object associated
with c.buf.

The functionality in this change is implemented in a new function
called racenotify()

Fixes #42598

Change-Id: I75b92708633fdfde658dc52e06264e2171824e51
Reviewed-on: https://go-review.googlesource.com/c/go/+/271987
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Dmitry Vyukov <dvyukov@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Ian Lance Taylor <iant@golang.org>

4 years agoregexp/syntax: add note about Unicode character classes
Tom Payne [Fri, 23 Oct 2020 22:40:00 +0000 (23:40 +0100)]
regexp/syntax: add note about Unicode character classes

As proposed on golang-nuts:
https://groups.google.com/g/golang-nuts/c/M3lmSUptExQ/m/hRySV9GsCAAJ

Includes the latest updates from re2's mksyntaxgo:
https://code.googlesource.com/re2/+/refs/heads/master/doc/mksyntaxgo

Change-Id: Ib7b79aa6531f473feabd0a7f1d263cd65c4388e4
Reviewed-on: https://go-review.googlesource.com/c/go/+/264678
Reviewed-by: Russ Cox <rsc@golang.org>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>

4 years agogo/constant: MakeFloat64(0) must return a value of Float kind
Robert Griesemer [Wed, 25 Nov 2020 04:28:20 +0000 (20:28 -0800)]
go/constant: MakeFloat64(0) must return a value of Float kind

Fixes #42641.

Change-Id: I10fdc7c90054b37ab5b303999015262691c12927
Reviewed-on: https://go-review.googlesource.com/c/go/+/273126
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
4 years agocmd/link: add relocation type R_AARCH64_LDST16_ABS_LO12_NC for arm64
eric fang [Wed, 18 Nov 2020 04:00:57 +0000 (04:00 +0000)]
cmd/link: add relocation type R_AARCH64_LDST16_ABS_LO12_NC for arm64

The linker already has R_AARCH64_LDST{8,32,64,128}_ABS_LO12_NC, some cgo tests require
 R_AARCH64_LDST16_ABS_LO12_NC, this CL adds this relocation type.

Fixes #42660

Change-Id: I9a5120cd872f5095c61175cb602427c6ab3225cc
Reviewed-on: https://go-review.googlesource.com/c/go/+/271017
Reviewed-by: eric fang <eric.fang@arm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: eric fang <eric.fang@arm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: eric fang <eric.fang@arm.com>
Trust: Benny Siegert <bsiegert@gmail.com>

4 years agogo/constant: make constant.Make produce "smallest" const representation
Robert Griesemer [Wed, 25 Nov 2020 01:26:22 +0000 (17:26 -0800)]
go/constant: make constant.Make produce "smallest" const representation

Fixes #42640.

Change-Id: I22b8142b0a47a0f957d1bda28cdfdbb8388cffc4
Reviewed-on: https://go-review.googlesource.com/c/go/+/273086
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
4 years agoruntime: use inlined function name for traceback elision
Austin Clements [Fri, 20 Nov 2020 22:32:46 +0000 (17:32 -0500)]
runtime: use inlined function name for traceback elision

Currently, gentraceback decides which frames to print or elide when
unwinding inlined frames using only the name of the outermost
function. If the outermost function should be elided, then inlined
functions will also be elided, even if they shouldn't be.

This happens in practice in at least one situation. As of CL 258938,
exported Go functions (and functions they call) can now be inlined
into the generated _cgoexp_HASH_FN function. The runtime elides
_cgoexp_HASH_FN from tracebacks because it doesn't contain a ".".
Because of this bug, it also elides anything that was inlined into it.

This CL fixes this by synthesizing a funcInfo for the inlined
functions to pass to showframe.

Fixes #42754.

Change-Id: Ie6c663a4a1ac7f0d4beb1aa60bc26fc8cddd0f9d
Reviewed-on: https://go-review.googlesource.com/c/go/+/272131
Trust: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
4 years agoruntime/testdata/testprogcgo: refactor CrashTraceback
Austin Clements [Fri, 20 Nov 2020 22:09:23 +0000 (17:09 -0500)]
runtime/testdata/testprogcgo: refactor CrashTraceback

This moves the C part of the CrashTraceback test into its own file in
preparation for adding a test that transitions back into Go.

Change-Id: I9560dcfd80bf8a1d30809fd360f958f5261ebb01
Reviewed-on: https://go-review.googlesource.com/c/go/+/272130
Trust: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
4 years agodoc/go1.16: fill in Go 1.16 release note TODOs using relnote
Dmitri Shuralyov [Tue, 24 Nov 2020 18:23:10 +0000 (13:23 -0500)]
doc/go1.16: fill in Go 1.16 release note TODOs using relnote

The additions were generated using golang.org/x/build/cmd/relnote
at CL 272907. It was modified to find previously-missed entries
by querying the Gerrit API in addition to the maintner corpus.

For #40700.
Updates #41849.

Change-Id: If575984fe40e0133ad5e8fc5411ea5063457250d
Reviewed-on: https://go-review.googlesource.com/c/go/+/272871
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
4 years agoruntime: allow for usleep2HighRes to run without TLS setup
Alex Brainman [Sat, 21 Nov 2020 03:56:26 +0000 (14:56 +1100)]
runtime: allow for usleep2HighRes to run without TLS setup

This change adjusts usleep2HighRes so it does not crash when TLS is
not configured. When g is not available, usleep2HighRes just calls
usleep2 instead.

Updates #8687

Change-Id: Idbb80f7b71d1da350a6a7df7c49154eb1ffe29a8
Reviewed-on: https://go-review.googlesource.com/c/go/+/271907
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Simon Rozman <simon@rozman.si>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
Trust: Alex Brainman <alex.brainman@gmail.com>

4 years agocmd/compile: set OpLoad argument type interface{} correctly
Cuong Manh Le [Mon, 23 Nov 2020 17:58:00 +0000 (00:58 +0700)]
cmd/compile: set OpLoad argument type interface{} correctly

CL 271906 allows loading single field of typed-interface{} OpIData, but
it does not update the corresponding selector type. So the generated
OpLoad has the named type instead, prevent it from being lowered by
lower pass.

Fixes #42784

Change-Id: Idf32e4f711731be09d508dd712b60bc8c58309bd
Reviewed-on: https://go-review.googlesource.com/c/go/+/272466
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: Cherry Zhang <cherryyz@google.com>
4 years agogo/types: fix incorrect string(int) conversion (regression)
Robert Griesemer [Mon, 23 Nov 2020 23:48:37 +0000 (15:48 -0800)]
go/types: fix incorrect string(int) conversion (regression)

The bug was introduced by https://golang.org/cl/220844.

Fixes #42790.

Change-Id: I44d619a1a4d3f2aee1c5575d5cfddcc4ba10895f
Reviewed-on: https://go-review.googlesource.com/c/go/+/272666
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
4 years agoruntime/metrics: tweak wording of stack and unused memory metrics
Michael Anthony Knyszek [Mon, 23 Nov 2020 19:25:32 +0000 (19:25 +0000)]
runtime/metrics: tweak wording of stack and unused memory metrics

This change tweaks and simplifies the descriptions of a couple metrics
to make them easier to parse (for humans).

Change-Id: I852654c7e7042c662ebdfa6334e3baf49ca4b33c
Reviewed-on: https://go-review.googlesource.com/c/go/+/272566
Trust: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agosync: use 386 instead of x86-32 to refer to the 32 bit x86 architecture
Martin Möhrmann [Sat, 21 Nov 2020 14:53:18 +0000 (15:53 +0100)]
sync: use 386 instead of x86-32 to refer to the 32 bit x86 architecture

This aligns the naming with GOARCH using 386 as a build target for
this architecture and makes it more easily found when searching
for documentation related to the build target.

Change-Id: I393bb89dd2f71e568124107b13e1b288fbd0c76a
Reviewed-on: https://go-review.googlesource.com/c/go/+/271988
Trust: Martin Möhrmann <moehrmann@google.com>
Run-TryBot: Martin Möhrmann <martisch@uos.de>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
4 years agocmd/compile: add test for 42753
Keith Randall [Fri, 20 Nov 2020 21:59:29 +0000 (13:59 -0800)]
cmd/compile: add test for 42753

This issue was already fixed at tip. Just adding the test that
failed on 1.14/1.15.

Update #42753

Change-Id: I00d13ade476b9c17190d762d7fdcb30cf6c83954
Reviewed-on: https://go-review.googlesource.com/c/go/+/272029
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
4 years agosyscall: add DLLError.Unwrap function
Jason A. Donenfeld [Fri, 13 Nov 2020 14:48:05 +0000 (15:48 +0100)]
syscall: add DLLError.Unwrap function

Because we're expecting for future functions to be unavailable, we
should add an Unwrap() function to the DLLError struct, so that people
can test for this situation easily via:

    if errors.Is(err, syscall.ERROR_PROC_NOT_FOUND) { ... }

DLLError already was wrapping the underlying Errno error, but never got
the Go 1.13 helper method.

Fixes golang/go#42584

Change-Id: I0f32a5146946b1b37a30897ba825a56faefc792c
Reviewed-on: https://go-review.googlesource.com/c/go/+/269761
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Trust: Alex Brainman <alex.brainman@gmail.com>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>

4 years agocmd/go/internal/modload: remove the Reqs function
Bryan C. Mills [Fri, 20 Nov 2020 22:03:42 +0000 (17:03 -0500)]
cmd/go/internal/modload: remove the Reqs function

The Reqs function returns an mvs.Reqs implemention for the global
build list. The API that it presents assumes that the build list is
globally consistent (problematic for #40775) and readily available
(problematic for #36460).

Fortunately, it is no longer used outside of the modload package.
We can instead use individual instances of the unexported mvsReqs
struct, making the dependency on the global build list more explicit.

For #36460
For #40775

Change-Id: I8674442f2a86416b0bf9c3395cb591c1e724c9d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/272129
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>
4 years agocmd/go/internal/modload: remove a stale comment for EditBuildList
Bryan C. Mills [Fri, 20 Nov 2020 21:40:49 +0000 (16:40 -0500)]
cmd/go/internal/modload: remove a stale comment for EditBuildList

For #36460
Updates #37438

Change-Id: I1626d40e78b110035a893b1b80dbd2279bf50ffe
Reviewed-on: https://go-review.googlesource.com/c/go/+/272128
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>
4 years agocmd/go: support the -overlay flag for go mod commands
Michael Matloob [Fri, 20 Nov 2020 19:09:03 +0000 (14:09 -0500)]
cmd/go: support the -overlay flag for go mod commands

Move the declaration of the -overlay flag to base.AddModCommonFlags,
where other flags that are needed for go mod commands and for builds
are declared. The flag's already initialized in modload.Init so
there's no additional work needed to be done to support it in the go
mod commands.

For #39958

Change-Id: I70725d620cc69cb820f6ed923d626f4fe041b1c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/272126
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Jay Conrod <jayconrod@google.com>
4 years agocmd/cgo, cmd/internal/pkgpath: support gofrontend mangler v3
Ian Lance Taylor [Fri, 20 Nov 2020 20:54:18 +0000 (12:54 -0800)]
cmd/cgo, cmd/internal/pkgpath: support gofrontend mangler v3

The gofrontend mangling scheme used by gccgo and GoLLVM has changed again.
Support the new version. This is a port of the relevant parts of
https://golang.org/cl/271726.

For #41862

Change-Id: I9c961c8e17ec960a83a23e1d49ea900962b63393
Reviewed-on: https://go-review.googlesource.com/c/go/+/272127
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agodoc: fix misspelling of “initialization” in diagnostics.html
Hollow Man [Fri, 20 Nov 2020 16:44:15 +0000 (16:44 +0000)]
doc: fix misspelling of “initialization” in diagnostics.html

initilization -> initialization

Change-Id: Ie5edd30559941f2d044280d8d586c2c2692d5b69
GitHub-Last-Rev: 7495a8c7227bc9c574c93861e5fedc1bada0397c
GitHub-Pull-Request: golang/go#42749
Reviewed-on: https://go-review.googlesource.com/c/go/+/272026
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Trust: Ian Lance Taylor <iant@golang.org>

4 years agocmd/go: support overlaying go.mod files
Michael Matloob [Fri, 30 Oct 2020 21:11:36 +0000 (17:11 -0400)]
cmd/go: support overlaying go.mod files

This change updates the lockedfile package to open files using the
new fsys.OpenFile function. The logic of fsys.Open has been moved into
fsys.OpenFile, and fsys.Open is now just a light wrapper around it.

For #39958

Change-Id: I552f1a45ac00ac06b5812008d17a61e610b4b113
Reviewed-on: https://go-review.googlesource.com/c/go/+/266797
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
4 years agocmd/go: recommend 'go get' command to switch from retracted versions
Jay Conrod [Fri, 20 Nov 2020 16:18:15 +0000 (11:18 -0500)]
cmd/go: recommend 'go get' command to switch from retracted versions

This CL restores a message unintentionally removed in CL 270858.

For #24031

Change-Id: I957c5c59e624df98e72dfff351298bfc5bf9a9e7
Reviewed-on: https://go-review.googlesource.com/c/go/+/272066
Trust: Jay Conrod <jayconrod@google.com>
Run-TryBot: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agocmd/compile: allow loading single field of typed-interface{} OpIData
Cuong Manh Le [Fri, 20 Nov 2020 07:09:01 +0000 (14:09 +0700)]
cmd/compile: allow loading single field of typed-interface{} OpIData

Same reason as CL 270057, but for OpLoad.

Fixes #42727

Change-Id: Iebb1a8110f29427a0aed3b5e3e84f0540de3d1b7
Reviewed-on: https://go-review.googlesource.com/c/go/+/271906
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: David Chase <drchase@google.com>
4 years agocmd/go: report changes and resolved versions in 'go get'
Jay Conrod [Wed, 18 Nov 2020 22:07:30 +0000 (17:07 -0500)]
cmd/go: report changes and resolved versions in 'go get'

Fixes #33284

Change-Id: I33daa5eb518985bc7308f29655e04c57e244b479
Reviewed-on: https://go-review.googlesource.com/c/go/+/269018
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
4 years agocmd/go/internal/modload: ignore selected version in checkRetractions
Jay Conrod [Fri, 13 Nov 2020 22:14:46 +0000 (17:14 -0500)]
cmd/go/internal/modload: ignore selected version in checkRetractions

Fixes #42601

Change-Id: I58d817ed34ccbd39591326c4bc23569f94028412
Reviewed-on: https://go-review.googlesource.com/c/go/+/272006
Run-TryBot: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Jay Conrod <jayconrod@google.com>

4 years agocmd/go: remove ListModules call in runGet
Jay Conrod [Thu, 19 Nov 2020 15:56:35 +0000 (10:56 -0500)]
cmd/go: remove ListModules call in runGet

ListModules was used to download .info files so that 'go list -m all'
would succeed later when offline. However, 'go list -m all' may
already fail when offline after 'go mod tidy', so it doesn't make
sense to add complexity to 'go get'.

Instead, remove the ListModules call and fix the test that
accidentally depended on it.

For #42723

Change-Id: I692597cf5ca15c23fa6fc9d2bac4b6e044299482
Reviewed-on: https://go-review.googlesource.com/c/go/+/271577
Trust: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
4 years agocmd/go/internal/modload: eliminate LoadedModules
Bryan C. Mills [Thu, 19 Nov 2020 18:58:52 +0000 (13:58 -0500)]
cmd/go/internal/modload: eliminate LoadedModules

As of CL 271646, all external callers have been eliminated. Replace
the remaining internal caller with a direct reference to the buildList
variable and remove the exported function to prevent backsliding.

For #36460

Change-Id: Iea82df1e3e604ada602dda3e830c06d441eee2a7
Reviewed-on: https://go-review.googlesource.com/c/go/+/271647
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Jay Conrod <jayconrod@google.com>
4 years agocmd/go/internal/work: remove a redundant call to modload.LoadedModules
Bryan C. Mills [Thu, 19 Nov 2020 18:26:51 +0000 (13:26 -0500)]
cmd/go/internal/work: remove a redundant call to modload.LoadedModules

The modload.EditBuildList call added in CL 270980 already ensures that
installMod does not require a newer version of itself, so the condition
that this loop is checking for is redundant.

(I had meant for this change to be included in CL 270980, but
apparently somehow reverted it prior to mailing.)

For #36460

Change-Id: I4dd746b927f7012d950187cac9c510cd6fec8fd9
Reviewed-on: https://go-review.googlesource.com/c/go/+/271646
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Trust: Bryan C. Mills <bcmills@google.com>

4 years agonet, internal/poll: reset value before adding in minor kernel version
Ian Lance Taylor [Fri, 20 Nov 2020 03:15:57 +0000 (19:15 -0800)]
net, internal/poll: reset value before adding in minor kernel version

Fixes #42733

Change-Id: I5446aeb5de13cd70212755fb12c9bc484f343c74
Reviewed-on: https://go-review.googlesource.com/c/go/+/271846
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agogo/types: use correct error position
Robert Griesemer [Fri, 20 Nov 2020 02:00:13 +0000 (18:00 -0800)]
go/types: use correct error position

Follow-up on https://golang.org/cl/271706 .

Change-Id: I90339987aed88b0de3ee7ebe7d413282055c260c
Reviewed-on: https://go-review.googlesource.com/c/go/+/271789
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agogo/types: fix error message for consistency
Robert Griesemer [Fri, 20 Nov 2020 00:38:11 +0000 (16:38 -0800)]
go/types: fix error message for consistency

Follow-up on https://golang.org/cl/271706 .
(Missed a review comment.)

Change-Id: Ibff542f43d721600a2452907c0a20941961e793f
Reviewed-on: https://go-review.googlesource.com/c/go/+/271766
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>

4 years agogo/types, go/constant: handle infinities as unknown values
Robert Griesemer [Thu, 19 Nov 2020 20:40:19 +0000 (12:40 -0800)]
go/types, go/constant: handle infinities as unknown values

With this change, constant literals (and results of constant
operations) that internally become infinities are represented
externally (to go/constant) as "unknown" values.

The language has no provisions to deal with infinite constants,
and producing unknown values allows the typechecker to report
errors and avoid invalid operations (such as multiplication of
zero with infinity).

Fixes #20583.

Change-Id: I12f36a17d262ff7957b0d3880241b5a8b2984777
Reviewed-on: https://go-review.googlesource.com/c/go/+/271706
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
4 years agoio/fs: make WalkDirFunc parameter name consistent with doc comment
fzipp [Sun, 8 Nov 2020 13:50:30 +0000 (13:50 +0000)]
io/fs: make WalkDirFunc parameter name consistent with doc comment

The the DirEntry parameter of WalkDirFunc is referred to as `d` in the doc comment.

Change-Id: Ibfcf7908eaa0ef1309898150e8fd71101e7de09b
GitHub-Last-Rev: e858c52d81b93d293621d7e744bdcb7d6cbd412c
GitHub-Pull-Request: golang/go#42447
Reviewed-on: https://go-review.googlesource.com/c/go/+/268277
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Russ Cox <rsc@golang.org>
4 years agoruntime/metrics: clarify Read's documentation
Michael Anthony Knyszek [Thu, 19 Nov 2020 15:07:06 +0000 (15:07 +0000)]
runtime/metrics: clarify Read's documentation

Change-Id: Idbcbc304f1568399a82af9dcd51e511393ed5ee0
Reviewed-on: https://go-review.googlesource.com/c/go/+/271558
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
4 years agoruntime/metrics: clarify memory and GC metrics documentation
Michael Anthony Knyszek [Thu, 19 Nov 2020 15:01:34 +0000 (15:01 +0000)]
runtime/metrics: clarify memory and GC metrics documentation

Change-Id: I8940990a591a808ddd4b8613531f52453f85bde1
Reviewed-on: https://go-review.googlesource.com/c/go/+/271557
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
4 years agocmd/go/internal/work: avoid modload.Selected in 'go install pkg@version'
Bryan C. Mills [Wed, 18 Nov 2020 18:44:39 +0000 (13:44 -0500)]
cmd/go/internal/work: avoid modload.Selected in 'go install pkg@version'

At this point in installOutsideModule the build list is empty, so
Selected trivially returns "none" for all modules.

(This change could have been made in CL 266657, but it was a bit
simpler to update the QueryPattern call sites mechanically to ensure
that there would be no unintentional semantic drift.)

For #36460

Change-Id: I44fb73794985bfeebb1dde0c092313f319c2945a
Reviewed-on: https://go-review.googlesource.com/c/go/+/271419
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>
4 years agocmd/go: fix failing gccgo cases in TestScript/build_overlay
Bryan C. Mills [Wed, 18 Nov 2020 03:54:13 +0000 (22:54 -0500)]
cmd/go: fix failing gccgo cases in TestScript/build_overlay

The 'go install' command does not support the -gccgo flag.
(I'm not sure why, but it doesn't.)

gccgo also uses system-native assembly syntax instead of cmd/compile's
Plan 9 derivative. I've added an assembly file that seems to work on
Linux, but I haven't tested it on other platforms; if it fails on
other platforms, we can refine the test as needed.

Fixes #42688

Change-Id: I0693a6a9eb58975f20cdc4160ef5f9a948563c88
Reviewed-on: https://go-review.googlesource.com/c/go/+/270978
Trust: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>
4 years agocmd/compile,cmd/asm: fix function pointer call perf regression on ppc64
Paul E. Murphy [Fri, 13 Nov 2020 20:44:25 +0000 (14:44 -0600)]
cmd/compile,cmd/asm: fix function pointer call perf regression on ppc64

by inserting hint when using bclrl.

Using this instruction as subroutine call is not the expected
default behavior, and as a result confuses the branch predictor.

The default expected behavior is a conditional return from a
subroutine.

We can change this assumption by encoding a hint this is not a
subroutine return.

The regex benchmarks are a pretty good example of how much this
hint can help generic ppc64le code on a power9 machine:

name                          old time/op    new time/op     delta
Find                             606ns ± 0%      447ns ± 0%  -26.27%
FindAllNoMatches                 309ns ± 0%      205ns ± 0%  -33.72%
FindString                       609ns ± 0%      451ns ± 0%  -26.04%
FindSubmatch                     734ns ± 0%      594ns ± 0%  -19.07%
FindStringSubmatch               706ns ± 0%      574ns ± 0%  -18.83%
Literal                          177ns ± 0%      136ns ± 0%  -22.89%
NotLiteral                      4.69µs ± 0%     2.34µs ± 0%  -50.14%
MatchClass                      6.05µs ± 0%     3.26µs ± 0%  -46.08%
MatchClass_InRange              5.93µs ± 0%     3.15µs ± 0%  -46.86%
ReplaceAll                      3.15µs ± 0%     2.18µs ± 0%  -30.77%
AnchoredLiteralShortNonMatch     156ns ± 0%      109ns ± 0%  -30.61%
AnchoredLiteralLongNonMatch      192ns ± 0%      136ns ± 0%  -29.34%
AnchoredShortMatch               268ns ± 0%      209ns ± 0%  -22.00%
AnchoredLongMatch                472ns ± 0%      357ns ± 0%  -24.30%
OnePassShortA                   1.16µs ± 0%     0.87µs ± 0%  -25.03%
NotOnePassShortA                1.34µs ± 0%     1.20µs ± 0%  -10.63%
OnePassShortB                    940ns ± 0%      655ns ± 0%  -30.29%
NotOnePassShortB                 873ns ± 0%      703ns ± 0%  -19.52%
OnePassLongPrefix                258ns ± 0%      155ns ± 0%  -40.13%
OnePassLongNotPrefix             943ns ± 0%      529ns ± 0%  -43.89%
MatchParallelShared              591ns ± 0%      436ns ± 0%  -26.31%
MatchParallelCopied              596ns ± 0%      435ns ± 0%  -27.10%
QuoteMetaAll                     186ns ± 0%      186ns ± 0%   -0.16%
QuoteMetaNone                   55.9ns ± 0%     55.9ns ± 0%   +0.02%
Compile/Onepass                 9.64µs ± 0%     9.26µs ± 0%   -3.97%
Compile/Medium                  21.7µs ± 0%     20.6µs ± 0%   -4.90%
Compile/Hard                     174µs ± 0%      174µs ± 0%   +0.07%
Match/Easy0/16                  7.35ns ± 0%     7.34ns ± 0%   -0.11%
Match/Easy0/32                   116ns ± 0%       97ns ± 0%  -16.27%
Match/Easy0/1K                   592ns ± 0%      562ns ± 0%   -5.04%
Match/Easy0/32K                 12.6µs ± 0%     12.5µs ± 0%   -0.64%
Match/Easy0/1M                   556µs ± 0%      556µs ± 0%   -0.00%
Match/Easy0/32M                 17.7ms ± 0%     17.7ms ± 0%   +0.05%
Match/Easy0i/16                 7.34ns ± 0%     7.35ns ± 0%   +0.10%
Match/Easy0i/32                 2.82µs ± 0%     1.64µs ± 0%  -41.71%
Match/Easy0i/1K                 83.2µs ± 0%     48.2µs ± 0%  -42.06%
Match/Easy0i/32K                2.13ms ± 0%     1.80ms ± 0%  -15.34%
Match/Easy0i/1M                 68.1ms ± 0%     57.6ms ± 0%  -15.31%
Match/Easy0i/32M                 2.18s ± 0%      1.80s ± 0%  -17.52%
Match/Easy1/16                  7.36ns ± 0%     7.34ns ± 0%   -0.24%
Match/Easy1/32                   118ns ± 0%       96ns ± 0%  -18.72%
Match/Easy1/1K                  2.46µs ± 0%     1.58µs ± 0%  -35.65%
Match/Easy1/32K                 80.2µs ± 0%     54.6µs ± 0%  -31.92%
Match/Easy1/1M                  2.75ms ± 0%     1.88ms ± 0%  -31.66%
Match/Easy1/32M                 87.5ms ± 0%     59.8ms ± 0%  -31.62%
Match/Medium/16                 7.34ns ± 0%     7.34ns ± 0%   +0.01%
Match/Medium/32                 2.60µs ± 0%     1.50µs ± 0%  -42.61%
Match/Medium/1K                 78.1µs ± 0%     43.7µs ± 0%  -44.06%
Match/Medium/32K                2.08ms ± 0%     1.52ms ± 0%  -27.11%
Match/Medium/1M                 66.5ms ± 0%     48.6ms ± 0%  -26.96%
Match/Medium/32M                 2.14s ± 0%      1.60s ± 0%  -25.18%
Match/Hard/16                   7.35ns ± 0%     7.35ns ± 0%   +0.03%
Match/Hard/32                   3.58µs ± 0%     2.44µs ± 0%  -31.82%
Match/Hard/1K                    108µs ± 0%       75µs ± 0%  -31.04%
Match/Hard/32K                  2.79ms ± 0%     2.25ms ± 0%  -19.30%
Match/Hard/1M                   89.4ms ± 0%     72.2ms ± 0%  -19.26%
Match/Hard/32M                   2.91s ± 0%      2.37s ± 0%  -18.60%
Match/Hard1/16                  11.1µs ± 0%      8.3µs ± 0%  -25.07%
Match/Hard1/32                  21.4µs ± 0%     16.1µs ± 0%  -24.85%
Match/Hard1/1K                   658µs ± 0%      498µs ± 0%  -24.27%
Match/Hard1/32K                 12.2ms ± 0%     11.7ms ± 0%   -4.60%
Match/Hard1/1M                   391ms ± 0%      374ms ± 0%   -4.40%
Match/Hard1/32M                  12.6s ± 0%      12.0s ± 0%   -4.68%
Match_onepass_regex/16           870ns ± 0%      611ns ± 0%  -29.79%
Match_onepass_regex/32          1.58µs ± 0%     1.08µs ± 0%  -31.48%
Match_onepass_regex/1K          45.7µs ± 0%     30.3µs ± 0%  -33.58%
Match_onepass_regex/32K         1.45ms ± 0%     0.97ms ± 0%  -33.20%
Match_onepass_regex/1M          46.2ms ± 0%     30.9ms ± 0%  -33.01%
Match_onepass_regex/32M          1.46s ± 0%      0.99s ± 0%  -32.02%

name                          old alloc/op   new alloc/op    delta
Find                             0.00B           0.00B         0.00%
FindAllNoMatches                 0.00B           0.00B         0.00%
FindString                       0.00B           0.00B         0.00%
FindSubmatch                     48.0B ± 0%      48.0B ± 0%    0.00%
FindStringSubmatch               32.0B ± 0%      32.0B ± 0%    0.00%
Compile/Onepass                 4.02kB ± 0%     4.02kB ± 0%    0.00%
Compile/Medium                  9.39kB ± 0%     9.39kB ± 0%    0.00%
Compile/Hard                    84.7kB ± 0%     84.7kB ± 0%    0.00%
Match_onepass_regex/16           0.00B           0.00B         0.00%
Match_onepass_regex/32           0.00B           0.00B         0.00%
Match_onepass_regex/1K           0.00B           0.00B         0.00%
Match_onepass_regex/32K          0.00B           0.00B         0.00%
Match_onepass_regex/1M           5.00B ± 0%      3.00B ± 0%  -40.00%
Match_onepass_regex/32M           136B ± 0%        68B ± 0%  -50.00%

name                          old allocs/op  new allocs/op   delta
Find                              0.00            0.00         0.00%
FindAllNoMatches                  0.00            0.00         0.00%
FindString                        0.00            0.00         0.00%
FindSubmatch                      1.00 ± 0%       1.00 ± 0%    0.00%
FindStringSubmatch                1.00 ± 0%       1.00 ± 0%    0.00%
Compile/Onepass                   52.0 ± 0%       52.0 ± 0%    0.00%
Compile/Medium                     112 ± 0%        112 ± 0%    0.00%
Compile/Hard                       424 ± 0%        424 ± 0%    0.00%
Match_onepass_regex/16            0.00            0.00         0.00%
Match_onepass_regex/32            0.00            0.00         0.00%
Match_onepass_regex/1K            0.00            0.00         0.00%
Match_onepass_regex/32K           0.00            0.00         0.00%
Match_onepass_regex/1M            0.00            0.00         0.00%
Match_onepass_regex/32M           2.00 ± 0%       1.00 ± 0%  -50.00%

name                          old speed      new speed       delta
QuoteMetaAll                  75.2MB/s ± 0%   75.3MB/s ± 0%   +0.15%
QuoteMetaNone                  465MB/s ± 0%    465MB/s ± 0%   -0.02%
Match/Easy0/16                2.18GB/s ± 0%   2.18GB/s ± 0%   +0.10%
Match/Easy0/32                 276MB/s ± 0%    330MB/s ± 0%  +19.46%
Match/Easy0/1K                1.73GB/s ± 0%   1.82GB/s ± 0%   +5.29%
Match/Easy0/32K               2.60GB/s ± 0%   2.62GB/s ± 0%   +0.64%
Match/Easy0/1M                1.89GB/s ± 0%   1.89GB/s ± 0%   +0.00%
Match/Easy0/32M               1.89GB/s ± 0%   1.89GB/s ± 0%   -0.05%
Match/Easy0i/16               2.18GB/s ± 0%   2.18GB/s ± 0%   -0.10%
Match/Easy0i/32               11.4MB/s ± 0%   19.5MB/s ± 0%  +71.48%
Match/Easy0i/1K               12.3MB/s ± 0%   21.2MB/s ± 0%  +72.62%
Match/Easy0i/32K              15.4MB/s ± 0%   18.2MB/s ± 0%  +18.12%
Match/Easy0i/1M               15.4MB/s ± 0%   18.2MB/s ± 0%  +18.12%
Match/Easy0i/32M              15.4MB/s ± 0%   18.6MB/s ± 0%  +21.21%
Match/Easy1/16                2.17GB/s ± 0%   2.18GB/s ± 0%   +0.24%
Match/Easy1/32                 271MB/s ± 0%    333MB/s ± 0%  +23.07%
Match/Easy1/1K                 417MB/s ± 0%    648MB/s ± 0%  +55.38%
Match/Easy1/32K                409MB/s ± 0%    600MB/s ± 0%  +46.88%
Match/Easy1/1M                 381MB/s ± 0%    558MB/s ± 0%  +46.33%
Match/Easy1/32M                383MB/s ± 0%    561MB/s ± 0%  +46.25%
Match/Medium/16               2.18GB/s ± 0%   2.18GB/s ± 0%   -0.01%
Match/Medium/32               12.3MB/s ± 0%   21.4MB/s ± 0%  +74.13%
Match/Medium/1K               13.1MB/s ± 0%   23.4MB/s ± 0%  +78.73%
Match/Medium/32K              15.7MB/s ± 0%   21.6MB/s ± 0%  +37.23%
Match/Medium/1M               15.8MB/s ± 0%   21.6MB/s ± 0%  +36.93%
Match/Medium/32M              15.7MB/s ± 0%   21.0MB/s ± 0%  +33.67%
Match/Hard/16                 2.18GB/s ± 0%   2.18GB/s ± 0%   -0.03%
Match/Hard/32                 8.93MB/s ± 0%  13.10MB/s ± 0%  +46.70%
Match/Hard/1K                 9.48MB/s ± 0%  13.74MB/s ± 0%  +44.94%
Match/Hard/32K                11.7MB/s ± 0%   14.5MB/s ± 0%  +23.87%
Match/Hard/1M                 11.7MB/s ± 0%   14.5MB/s ± 0%  +23.87%
Match/Hard/32M                11.6MB/s ± 0%   14.2MB/s ± 0%  +22.86%
Match/Hard1/16                1.44MB/s ± 0%   1.93MB/s ± 0%  +34.03%
Match/Hard1/32                1.49MB/s ± 0%   1.99MB/s ± 0%  +33.56%
Match/Hard1/1K                1.56MB/s ± 0%   2.05MB/s ± 0%  +31.41%
Match/Hard1/32K               2.68MB/s ± 0%   2.80MB/s ± 0%   +4.48%
Match/Hard1/1M                2.68MB/s ± 0%   2.80MB/s ± 0%   +4.48%
Match/Hard1/32M               2.66MB/s ± 0%   2.79MB/s ± 0%   +4.89%
Match_onepass_regex/16        18.4MB/s ± 0%   26.2MB/s ± 0%  +42.41%
Match_onepass_regex/32        20.2MB/s ± 0%   29.5MB/s ± 0%  +45.92%
Match_onepass_regex/1K        22.4MB/s ± 0%   33.8MB/s ± 0%  +50.54%
Match_onepass_regex/32K       22.6MB/s ± 0%   33.9MB/s ± 0%  +49.67%
Match_onepass_regex/1M        22.7MB/s ± 0%   33.9MB/s ± 0%  +49.27%
Match_onepass_regex/32M       23.0MB/s ± 0%   33.9MB/s ± 0%  +47.14%

Fixes #42709

Change-Id: Ice07fec2de4c5b1302febf8c2978ae8c1e4fd3e5
Reviewed-on: https://go-review.googlesource.com/c/go/+/271337
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
Trust: Carlos Eduardo Seo <carlos.seo@linaro.org>

4 years agocmd/compile: flag "-d=dumpptrs" to print Node ptrs in Dump output
Dan Scales [Thu, 19 Nov 2020 00:42:31 +0000 (16:42 -0800)]
cmd/compile:  flag "-d=dumpptrs" to print Node ptrs in Dump output

The printing of the ptr values can mean that two dump outputs can't easily be
compared for the identical structure, so adding the "-d=dumpptrs" option to make
printing of Node pointer values be an option.

Change-Id: I0e92b02f069e9de2e6fa036a7841645d13cdd7a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/271339
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
4 years agoruntime: support new callbackasm1 calling convention on windows/arm
Jason A. Donenfeld [Wed, 18 Nov 2020 20:38:57 +0000 (21:38 +0100)]
runtime: support new callbackasm1 calling convention on windows/arm

This updates the callbacks implementation on windows/arm for the
changes made in CL 258938. At the time, that was left as a TODO.

At the same time, it also extends the previous support for only 4
arguments to also support additional arguments on the stack. This is
required for functions like SetWinEventHook, which take 7 arguments. It
does this by pushing r0-r3 onto the stack before the normal prologue,
and then pointing the args struct to that location.

This is derived from CL 270077 and CL 270078.

Updates #40724.
Fixes #42591.

Change-Id: Icc199e7f2c24205e41be4e00015283c7e2a9b797
Reviewed-on: https://go-review.googlesource.com/c/go/+/271178
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Austin Clements <austin@google.com>
4 years agocmd/go/internal/modload: remove SetBuildList
Bryan C. Mills [Wed, 18 Nov 2020 04:16:30 +0000 (23:16 -0500)]
cmd/go/internal/modload: remove SetBuildList

For the last remaining call site (in cmd/go/internal/work, added for
the new 'go install pkg@version' codepath in CL 254365), use
EditBuildList instead.

SetBuildList assumes that the caller has enough information to produce
a complete, coherent build list. With lazy loading, producing a
complete, coherent build list is no longer quite so trivial.

In CL 263267, I rewrote the main caller of SetBuildList (the 'go get'
command), and in the process added a more targeted modload hook
(EditBuildList). That hook also suffices for 'go install pkg@version'.
The resulting error messages are perhaps not as smooth as they ought
to be, but if they are too awkward we should probably fix them for
'go get' too, and the commands can continue to share the edit hook.

For #36460
Updates #40276

Change-Id: I698a9dcd2efe6378a4d91f21362880aa8e50001b
Reviewed-on: https://go-review.googlesource.com/c/go/+/270980
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>