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7 years agocmd/compile/internal/amd64: add MOVLloadidx8 and MOVLstoreidx8
Ilya Tocar [Tue, 20 Jun 2017 20:36:34 +0000 (15:36 -0500)]
cmd/compile/internal/amd64: add MOVLloadidx8 and MOVLstoreidx8

Currently we only use 1 and 4 as a scale for indexed 4-byte load.
In code generated in #20711 we can use indexed load with scale=8,
to improve performance:

name  old time/op  new time/op  delta
GM-6   108µs ± 0%    95µs ± 0%  -12.06%  (p=0.000 n=10+10)

So add new ops and combine loadidx1(shift 3..).. into loadidx8,
same for stores.

Change-Id: I5ed1c250ac40960e20606580cf9de221e75b72f1
Reviewed-on: https://go-review.googlesource.com/46134
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
7 years agocmd/go: pass plugin package name to compile -p
David Crawshaw [Fri, 1 Sep 2017 15:20:33 +0000 (11:20 -0400)]
cmd/go: pass plugin package name to compile -p

When compiling a plugin, package main gets a new name so as not to
conflict with the main package in the host binary, or any other
plugins. It is already defined by cmd/go, and used by cmd/link when
filling out the "" package placeholder in symbols.

With this CL, the plugin-specific name for main is also passed to
cmd/compile's -p flag. This is used to fill out the pkgpath field
of types, and ensures that two types defined in two different plugin
mains with the same name will not be mistaken for one another at
runtime.

Fixes #21386

Change-Id: I8a646d8d7451caff533fe0007343ea8b8e1704ed
Reviewed-on: https://go-review.googlesource.com/60910
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agospec: clarify context type for certain non-constant shifts
griesemer [Wed, 30 Aug 2017 13:10:12 +0000 (15:10 +0200)]
spec: clarify context type for certain non-constant shifts

The spec is not conclusive about whether a non-constant shift of
certain untyped constant left operands is valid when the shift
expression appears as an index in an index or slice expression,
or as a size in a `make` function call.

Despite identical spec rules in all these cases, cmd/compile accepts

make([]byte, 1.0 << s)

but pronounces an error for

a[1.0 << s]

(go/types accepts both).

This change clarifies the spec by explicitly stating that an
untyped constant left operand in a non-constant shift (1.0 in
the above examples) will be given type `int` in these contexts.

A separate issue #21693 addresses the cmd/compile bug.

Fixes #14844.

Change-Id: I4b52125e487a607fae377fcbed55463cdce9836c
Reviewed-on: https://go-review.googlesource.com/60230
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agoarchive/tar: populate Devmajor and Devminor in FileInfoHeader on Darwin
Tobias Klauser [Thu, 31 Aug 2017 11:26:40 +0000 (13:26 +0200)]
archive/tar: populate Devmajor and Devminor in FileInfoHeader on Darwin

Extract device major/minor number on Darwin and set Devmajor and
Devminor in FileInfoHeader. Code based on the Major/Minor functions for
Darwin in golang.org/x/sys/unix.

Change-Id: I51b65f607bfa2e6b177b8b66e2b246b771367b84
Reviewed-on: https://go-review.googlesource.com/60850
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agogo/types: fix Info.Implicits entries
griesemer [Thu, 31 Aug 2017 15:41:51 +0000 (17:41 +0200)]
go/types: fix Info.Implicits entries

Packages of dot imports don't appear in the Info.Implicits map
since they are already taken care of by the Info.Defs map. Fix
documentation.

Implicitly dot-imported objects of a package shouldn't appear
in the Info.Implicits map because the documentation never said
so and there's no way to map multiple objects to the same
*ast.ImportSpec with the current data structure.

Added missing test for Info.Implicits.

The fix is a trivial one-line deletion, the rest is documentation
and test.

Fixes #21591.

Change-Id: I12a37dab85c531911c9363ec3d58daa095c7eb24
Reviewed-on: https://go-review.googlesource.com/60672
Reviewed-by: Alan Donovan <adonovan@google.com>
7 years agocmd/go: document the build flags properly for vet
Rob Pike [Fri, 1 Sep 2017 03:00:51 +0000 (13:00 +1000)]
cmd/go: document the build flags properly for vet

The "build flags" mentioned in the documentation are only those
that apply to analyzing packages and executing the tool.

Fixes #21711.

Change-Id: Ie7b2a354f1e30c928b40888c51fc68e599a5444a
Reviewed-on: https://go-review.googlesource.com/60830
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/cgo: support large unsigned macro again
Hiroshi Ioka [Thu, 31 Aug 2017 04:49:43 +0000 (13:49 +0900)]
cmd/cgo: support large unsigned macro again

The approach of https://golang.org/cl/43476 turned out incorrect.
The problem is that the sniff introduced by the CL only work for simple
expression. And when it fails it fallback to uint64, not int64, which
breaks backward compatibility.
In this CL, we use DWARF for guessing kind instead. That should be more
reliable than previous approach. And importanly, it fallbacks to int64 even
if it fails to guess kind.

Fixes #21708

Change-Id: I39a18cb2efbe4faa9becdcf53d5ac68dba180d46
Reviewed-on: https://go-review.googlesource.com/60510
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/go: fix clang option handling
Joel Sing [Thu, 31 Aug 2017 17:14:38 +0000 (03:14 +1000)]
cmd/go: fix clang option handling

On OpenBSD -current, clang is available/installed as 'cc'. This means that
the existing clang check fails and the clang related flags are not enabled.
Fix this by enabling the clang flags if the compiler claims to support them.

Change-Id: I84d124d2409a10f87002c6cbfdb69b4c9a55981a
Reviewed-on: https://go-review.googlesource.com/60750
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agocrypto/cipher: extend the docs of BlockMode and Stream
Filippo Valsorda [Mon, 27 Feb 2017 12:45:02 +0000 (18:15 +0530)]
crypto/cipher: extend the docs of BlockMode and Stream

Change-Id: Iebb5b67c8defec22edd482d587edaf399a7ba82a
Reviewed-on: https://go-review.googlesource.com/37418
Reviewed-by: Adam Langley <agl@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agodoc/articles/wiki: fix final-test.patch
Matthew Dempsky [Thu, 31 Aug 2017 20:24:43 +0000 (13:24 -0700)]
doc/articles/wiki: fix final-test.patch

Fixes test regression introduced by golang.org/cl/53071.

Change-Id: Ibb085cf6d6be7b91b7c90b7bc6237c10f3097703
Reviewed-on: https://go-review.googlesource.com/60775
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
7 years agogo/types: escape +build sequence to silence vet warning
Matthew Dempsky [Thu, 31 Aug 2017 20:35:56 +0000 (13:35 -0700)]
go/types: escape +build sequence to silence vet warning

Appease the vet builder until we figure out the ideal solution.

Updates #21716.

Change-Id: I64ecdf9b6efb0933c5c79e11c860966ff1980305
Reviewed-on: https://go-review.googlesource.com/60776
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agocmd/link: emit DW_AT_data_member_location as a constant
Heschi Kreinick [Wed, 26 Jul 2017 19:58:25 +0000 (15:58 -0400)]
cmd/link: emit DW_AT_data_member_location as a constant

Simplify the DWARF representation of structs by emitting field offsets
as constants rather than location descriptions.

This was not explicitly mentioned as an option in DWARF2. It is
mentioned in DWARF4, but isn't listed in the changes, so it's not clear
if this was always intended to work or is an undocumented change. Either
way, it should be valid DWARF4.

Change-Id: Idf7fdd397a21c8f8745673ecc77ef65afa3ffe1c
Reviewed-on: https://go-review.googlesource.com/51611
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: David Chase <drchase@google.com>
7 years agoio/ioutil: don't cap buffer size in ReadFile
Bryan C. Mills [Tue, 15 Aug 2017 19:08:39 +0000 (15:08 -0400)]
io/ioutil: don't cap buffer size in ReadFile

When we added a Stat call to determine the initial buffer size in
https://golang.org/cl/163069, we included an arbitrary 1e9-byte limit
"just in case". That interacts badly with power-of-2 resizing in
*bytes.Buffer: it causes buffers reading from very large files to
consume up to twice the necessary space.

The documentation for (os.FileInfo).Size says that it reports "length
in bytes for regular files; system-dependent for others", but the
"system dependent" cases overwhelmingly return either a small number
(e.g., the length of the target path for a symlink) or a non-positive
number (e.g., for a file in /proc under Linux). It should be
appropriate to use the number reported by Size as an approximate lower
bound, even if it is large.

fixes #21455

Change-Id: I609c72519b7b87428c24d0b22db46eede30e0e54
Reviewed-on: https://go-review.googlesource.com/55870
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agocmd/fix: rewrite x/net/context by default
Sam Whited [Thu, 24 Aug 2017 17:39:34 +0000 (12:39 -0500)]
cmd/fix: rewrite x/net/context by default

Since these are type aliases in Go 1.9 make rewriting
golang.org/x/net/context imports to context the default.

Change-Id: Ib7ee58b59ea5463b92e1590c8b8f5c0ef87d310b
Reviewed-on: https://go-review.googlesource.com/58590
Reviewed-by: Sameer Ajmani <sameer@golang.org>
Run-TryBot: Sam Whited <sam@samwhited.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agodoc: add error handling on http.ListenAndServe
Francesc Campoy Flores [Thu, 3 Aug 2017 17:52:42 +0000 (10:52 -0700)]
doc: add error handling on http.ListenAndServe

Fixes #19511

Change-Id: I5585726773b822dba0be0196961132323ebbe084
Reviewed-on: https://go-review.googlesource.com/53071
Reviewed-by: Chris Broadfoot <cbro@golang.org>
7 years agonet/http: make startBackgroundRead panic if hijacked
Kunpei Sakai [Tue, 29 Aug 2017 09:56:59 +0000 (18:56 +0900)]
net/http: make startBackgroundRead panic if hijacked

Fixes #20933

Change-Id: I827c8d265674a7448c51c1da991e9b3b4501ba11
Reviewed-on: https://go-review.googlesource.com/59850
Run-TryBot: Tom Bergan <tombergan@google.com>
Reviewed-by: Tom Bergan <tombergan@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agocmd/internal/obj/arm: support more ARM VFP instructions
Ben Shi [Wed, 30 Aug 2017 08:20:43 +0000 (08:20 +0000)]
cmd/internal/obj/arm: support more ARM VFP instructions

Add support of more ARM VFP instructions in the assembler.
They were introduced in ARM VFPv2.

"NMULF/NMULD   Fm, Fn, Fd": Fd = -Fn*Fm
"MULAF/MULAD   Fm, Fn, Fd": Fd = Fd + Fn*Fm
"NMULAF/NMULAD Fm, Fn, Fd": Fd = -(Fd + Fn*Fm)
"MULSF/MULSD   Fm, Fn, Fd": Fd = Fd - Fn*Fm
"NMULSF/NMULSD Fm, Fn, Fd": Fd = -(Fd - Fn*Fm)

Change-Id: Icd302676ca44a9f5f153fce734225299403c4163
Reviewed-on: https://go-review.googlesource.com/60170
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agomath/big: fix internal comment
griesemer [Thu, 31 Aug 2017 13:02:24 +0000 (15:02 +0200)]
math/big: fix internal comment

Change-Id: Id003e2dbecad7b3c249a747f8b4032135dfbe34f
Reviewed-on: https://go-review.googlesource.com/60670
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>
7 years agogo/types: add +build ignore to file generated by hilbert test
griesemer [Thu, 31 Aug 2017 09:39:17 +0000 (11:39 +0200)]
go/types: add +build ignore to file generated by hilbert test

This makes sure that the go/types package still builds even if
the hilbert test generated its test file in the go/types package
(when run as: go test -run Hilbert -out=h.go).

Change-Id: I60ecbaaa1537de14cfa95e2e6fc8ebedff651baf
Reviewed-on: https://go-review.googlesource.com/60531
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>
7 years agocompress/flate: remove non-standard extensions to flate
Joe Tsai [Thu, 31 Aug 2017 01:49:18 +0000 (18:49 -0700)]
compress/flate: remove non-standard extensions to flate

Some constants were added to flate that seem to be an experimental
attempt at increasing the window size. However, according to RFC1951,
the largest window size is 32KiB, so these constants are non-standard.
Delete them.

Fixes #18458

Change-Id: Ia94989637ca031a56bce2548624fa48044caa7b9
Reviewed-on: https://go-review.googlesource.com/60490
Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
7 years agoarchive/zip: support "end of central directory record comment"
Kenji Yano [Sat, 26 Aug 2017 09:44:27 +0000 (18:44 +0900)]
archive/zip: support "end of central directory record comment"

This change added support "end of central directory record comemnt" to the Writer.

There is a new exported field Writer.Comment in this change.
If invalid size of comment was set, Close returns error without closing resources.

Fixes #21634

Change-Id: Ifb62bc6c7f81b9257ac83eb570ad9915de727f8c
Reviewed-on: https://go-review.googlesource.com/59310
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agocmd/compile: remove redundant constant shift rules
Cherry Zhang [Wed, 30 Aug 2017 16:11:29 +0000 (12:11 -0400)]
cmd/compile: remove redundant constant shift rules

Normal shift rules plus constant folding are enough to generate
efficient shift-by-constant instructions.

Add test to make sure we don't generate comparisons for constant
shifts.

TODO: there are still constant shift rules on PPC64. If they
are removed, the constant folding rules are not enough to remove
all the test and mask stuff for constant shifts. Leave them in
for now.

Fixes #20663.

Change-Id: I724cc324aa8607762d0c8aacf9bfa641bda5c2a1
Reviewed-on: https://go-review.googlesource.com/60330
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
7 years agonet/url: make Parse+String round trip magnet URLs
Johnny Luo [Sun, 16 Jul 2017 00:39:11 +0000 (10:39 +1000)]
net/url: make Parse+String round trip magnet URLs

Fixes #20054

Change-Id: I3c660ca0c56cdde2c2ac2f6a666d8531ab5588c5
Reviewed-on: https://go-review.googlesource.com/49050
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
7 years agoruntime: add symbols for Linux syscall numbers on 386/amd64
Chris Ball [Thu, 25 May 2017 19:48:02 +0000 (15:48 -0400)]
runtime: add symbols for Linux syscall numbers on 386/amd64

Matches other architectures by using names for syscalls instead of
numbers directly.

Fixes #20499.

Change-Id: I63d606b0b1fe6fb517fd994a7542a3f38d80dd54
Reviewed-on: https://go-review.googlesource.com/44213
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agoruntime: fix regression in BenchmarkCompareBytes* for ppc64x
Carlos Eduardo Seo [Fri, 25 Aug 2017 18:00:00 +0000 (15:00 -0300)]
runtime: fix regression in BenchmarkCompareBytes* for ppc64x

Between go1.7 and go1.8, a performance regression was introduced in some of the
BenchmarkCompareBytes benchmarks.

Go1.7 vs Go1.8:
BenchmarkCompareBytesToNil-8               7.44          8.44          +13.44%
BenchmarkCompareBytesIdentical-8           6.96          11.5          +65.23%
BenchmarkCompareBytesBigIdentical-8        6.65          47112         +708351.13%

This change fixes the problem by optimizing the case where the byte slices being
compared are equal:

Go1.9 vs current:
BenchmarkCompareBytesToNil-8               7.35          7.00          -4.76%
BenchmarkCompareBytesIdentical-8           11.4          6.81          -40.26%
BenchmarkCompareBytesBigIdentical-8        48396         9.26          -99.98%

runtime.cmpstring can benefit from the same approach and is also changed.

Change-Id: I3cb25f59d8b940a83a2cf687eea764cfeff90688
Reviewed-on: https://go-review.googlesource.com/59650
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
7 years agocmd/cgo: support niladic function-like macros
Hiroshi Ioka [Tue, 23 May 2017 14:01:08 +0000 (23:01 +0900)]
cmd/cgo: support niladic function-like macros

Currently, cgo supports only macros which can be reduced to constants
or variables. The CL addresses remaining parts, macros which can be
represented as niladic functions.

The basic idea is simple:
  1. make a thin wrapper function per macros.
  2. replace macro expansions with function calls.

Fixes #10715
Fixes #18720

Change-Id: I150b4fb48e9dc4cc34466ef6417c04ac93d4bc1a
Reviewed-on: https://go-review.googlesource.com/43970
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agoarchive/tar: minor doc fixes
Joe Tsai [Sat, 26 Aug 2017 09:12:56 +0000 (02:12 -0700)]
archive/tar: minor doc fixes

Use "file" consistently instead of "entry".

Change-Id: Ia81c9665d0d956adb78f7fa49de40cdb87fba000
Reviewed-on: https://go-review.googlesource.com/60150
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agoarchive/tar: require opt-in to PAX or GNU format for time features
Joe Tsai [Fri, 25 Aug 2017 23:48:46 +0000 (16:48 -0700)]
archive/tar: require opt-in to PAX or GNU format for time features

Nearly every Header obtained from FileInfoHeader via the FS has
timestamps with sub-second resolution and the AccessTime
and ChangeTime fields populated. This forces the PAX format
to almost always be used, which has the following problems:
* PAX is still not as widely supported compared to USTAR
* The PAX headers will occupy at minimum 1KiB for every entry

The old behavior of tar Writer had no support for sub-second resolution
nor any support for AccessTime or ChangeTime, so had neither problem.
Instead the Writer would just truncate sub-second information and
ignore the AccessTime and ChangeTime fields.

In this CL, we preserve the behavior such that the *default* behavior
would output a USTAR header for most cases by truncating sub-second
time measurements and ignoring AccessTime and ChangeTime.
To use either of the features, users will need to explicitly specify
that the format is PAX or GNU.

The exact policy chosen is this:
* USTAR and GNU may still be chosen even if sub-second measurements
are present; they simply truncate the timestamp to the nearest second.
As before, PAX uses sub-second resolutions.
* If the Format is unspecified, then WriteHeader ignores AccessTime
and ChangeTime when using the USTAR format.

This ensures that USTAR may still be chosen for a vast majority of
file entries obtained through FileInfoHeader.

Updates #11171
Updates #17876

Change-Id: Icc5274d4245922924498fd79b8d3ae94d5717271
Reviewed-on: https://go-review.googlesource.com/59230
Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agoruntime/internal/sys: use standard generated code header
Marvin Stenger [Wed, 30 Aug 2017 11:52:12 +0000 (13:52 +0200)]
runtime/internal/sys: use standard generated code header

This change implements the convention for generated code header agreed upon in https://golang.org/s/generatedcode.
Additionally run go generate.
Also update some comments.

Updates #13560

Change-Id: If45f91b93aaa0d43280c2c4630823bc4d2dc7d3a
Reviewed-on: https://go-review.googlesource.com/60250
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocontext: fix lint warning “drop = 0 from declaration”
Michael Stapelberg [Wed, 30 Aug 2017 14:50:13 +0000 (07:50 -0700)]
context: fix lint warning “drop = 0 from declaration”

Previously, the suggested code would result in the following golint warning:
“should drop = 0 from declaration of var errorsOnlyKey; it is the zero value”

Change-Id: I1a302c1e40ca89acbc76897e39097ecd04865460
Reviewed-on: https://go-review.googlesource.com/60290
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/compile/internal/ssa: remove redundant zeroextensions on amd64
Ilya Tocar [Wed, 23 Aug 2017 16:08:56 +0000 (11:08 -0500)]
cmd/compile/internal/ssa: remove redundant zeroextensions on amd64

Some instructions operating on <= 32 bits also zero out upper 32bits.
Remove zeroextensions of such values. Triggers a few times during
all.bash. Also removes ugly code like:
MOVL CX,CX

Change-Id: I66a46c190dd6929b7e3c52f3fe6b967768d00638
Reviewed-on: https://go-review.googlesource.com/58090
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
7 years agodoc: minor clarification regarding the sharing of underlying arrays
griesemer [Tue, 29 Aug 2017 13:48:07 +0000 (15:48 +0200)]
doc: minor clarification regarding the sharing of underlying arrays

The last sentence in the section on slice expressions could be read
as if it might apply to strings. Changed the sentence a bit to
emphasize its applicability to slices only. See also the issue for
more background.

Fixes #19220.

Change-Id: I8551f34230e4ed93f951e7b871cc81f54a5874a9
Reviewed-on: https://go-review.googlesource.com/59890
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/compile: optimize ARM with MULS
Ben Shi [Fri, 25 Aug 2017 12:07:01 +0000 (12:07 +0000)]
cmd/compile: optimize ARM with MULS

MULS was introduced in ARMv7 and corresponding to MULA. This patch
duplicated all MULA related SSA rules with MULS.

Here was the contrast test result against the original go compiler.
There was no improvement in total, but big improvement in special cases.

1. A specific test case accelerated 18.62%.
(https://github.com/benshi001/ugo1/blob/master/mulsub_test.go)
name                     old time/op    new time/op    delta
MulSub-4                    270µs ± 0%     219µs ± 0%  -18.62%  (p=0.000 n=35+40)

2. Total size of all .a files in pkg/ shrank by 0.002%.

3. The compilecmp benchmark showed no decline.
name        old time/op       new time/op       delta
Template          2.37s ± 3%        2.36s ± 1%    ~     (p=0.233 n=19+18)
Unicode           1.32s ± 2%        1.34s ± 5%  +1.32%  (p=0.011 n=20+18)
GoTypes           7.88s ± 1%        7.87s ± 1%    ~     (p=0.758 n=20+20)
Compiler          37.5s ± 1%        37.6s ± 1%    ~     (p=0.194 n=20+19)
SSA               83.7s ± 2%        83.5s ± 2%    ~     (p=0.569 n=20+19)
Flate             1.46s ± 3%        1.45s ± 1%    ~     (p=0.619 n=20+17)
GoParser          1.87s ± 2%        1.85s ± 1%  -0.58%  (p=0.048 n=20+18)
Reflect           5.10s ± 2%        5.11s ± 2%    ~     (p=0.365 n=19+20)
Tar               1.78s ± 2%        1.78s ± 2%    ~     (p=0.531 n=19+20)
XML               2.62s ± 1%        2.61s ± 2%    ~     (p=0.057 n=17+19)
[Geo mean]        4.68s             4.67s       -0.07%

name        old user-time/op  new user-time/op  delta
Template          2.80s ± 1%        2.79s ± 2%    ~     (p=0.686 n=17+20)
Unicode           1.61s ± 4%        1.63s ± 6%    ~     (p=0.222 n=20+20)
GoTypes           9.59s ± 1%        9.60s ± 1%    ~     (p=0.482 n=17+20)
Compiler          46.1s ± 1%        46.2s ± 1%    ~     (p=0.373 n=20+18)
SSA                108s ± 1%         108s ± 2%    ~     (p=0.784 n=20+20)
Flate             1.68s ± 3%        1.69s ± 3%    ~     (p=0.335 n=20+19)
GoParser          2.20s ± 4%        2.19s ± 2%    ~     (p=0.844 n=20+18)
Reflect           5.97s ± 3%        6.01s ± 2%    ~     (p=0.184 n=20+20)
Tar               2.11s ± 2%        2.11s ± 4%    ~     (p=0.961 n=19+20)
XML               3.07s ± 1%        3.07s ± 3%    ~     (p=0.786 n=16+19)
[Geo mean]        5.61s             5.62s       +0.19%

name        old text-bytes    new text-bytes    delta
HelloSize         586kB ± 0%        586kB ± 0%    ~     (all equal)

name        old data-bytes    new data-bytes    delta
HelloSize        5.46kB ± 0%       5.46kB ± 0%    ~     (all equal)

name        old bss-bytes     new bss-bytes     delta
HelloSize        72.9kB ± 0%       72.9kB ± 0%    ~     (all equal)

name        old exe-bytes     new exe-bytes     delta
HelloSize        1.03MB ± 0%       1.03MB ± 0%    ~     (all equal)

4. The go1 benchmark showed no decline in total.
name                     old time/op    new time/op    delta
BinaryTree17-4              41.7s ± 1%     41.7s ± 1%    ~     (p=0.966 n=40+40)
Fannkuch11-4                23.6s ± 0%     23.6s ± 1%  -0.23%  (p=0.000 n=40+40)
FmtFprintfEmpty-4           844ns ± 1%     834ns ± 1%  -1.23%  (p=0.000 n=40+40)
FmtFprintfString-4         1.39µs ± 1%    1.40µs ± 1%  +0.71%  (p=0.000 n=40+40)
FmtFprintfInt-4            1.44µs ± 1%    1.45µs ± 1%  +0.70%  (p=0.000 n=40+40)
FmtFprintfIntInt-4         2.10µs ± 1%    2.10µs ± 1%  +0.30%  (p=0.000 n=40+40)
FmtFprintfPrefixedInt-4    2.49µs ± 0%    2.50µs ± 1%  +0.66%  (p=0.000 n=32+40)
FmtFprintfFloat-4          4.42µs ± 1%    4.46µs ± 2%  +0.94%  (p=0.000 n=40+40)
FmtManyArgs-4              8.31µs ± 1%    8.22µs ± 1%  -1.09%  (p=0.000 n=40+40)
GobDecode-4                 105ms ± 1%     102ms ± 1%  -2.30%  (p=0.000 n=39+39)
GobEncode-4                90.2ms ± 1%    88.7ms ± 1%  -1.66%  (p=0.000 n=40+39)
Gzip-4                      4.17s ± 1%     4.16s ± 1%    ~     (p=0.785 n=40+40)
Gunzip-4                    608ms ± 1%     608ms ± 1%    ~     (p=0.481 n=40+40)
HTTPClientServer-4          697µs ± 2%     684µs ± 3%  -1.89%  (p=0.000 n=37+40)
JSONEncode-4                255ms ± 1%     256ms ± 1%  +0.35%  (p=0.000 n=40+40)
JSONDecode-4                920ms ± 1%     926ms ± 1%  +0.64%  (p=0.000 n=40+39)
Mandelbrot200-4            49.3ms ± 1%    49.3ms ± 0%  +0.07%  (p=0.005 n=40+40)
GoParse-4                  46.8ms ± 2%    46.7ms ± 1%    ~     (p=1.000 n=40+40)
RegexpMatchEasy0_32-4      1.27µs ± 0%    1.27µs ± 1%    ~     (p=0.057 n=40+40)
RegexpMatchEasy0_1K-4      7.97µs ± 7%    7.92µs ± 5%    ~     (p=0.094 n=40+40)
RegexpMatchEasy1_32-4      1.28µs ± 1%    1.28µs ± 1%    ~     (p=0.406 n=40+40)
RegexpMatchEasy1_1K-4      10.5µs ± 4%    10.5µs ± 3%    ~     (p=0.855 n=40+40)
RegexpMatchMedium_32-4     2.04µs ± 0%    2.04µs ± 1%  -0.22%  (p=0.000 n=39+40)
RegexpMatchMedium_1K-4      541µs ± 0%     540µs ± 1%  -0.25%  (p=0.000 n=40+38)
RegexpMatchHard_32-4       29.3µs ± 1%    29.3µs ± 0%    ~     (p=0.149 n=40+40)
RegexpMatchHard_1K-4        878µs ± 1%     880µs ± 0%  +0.14%  (p=0.005 n=36+35)
Revcomp-4                  81.8ms ± 2%    81.4ms ± 2%  -0.43%  (p=0.015 n=38+39)
Template-4                  1.05s ± 1%     1.05s ± 1%    ~     (p=0.302 n=40+35)
TimeParse-4                7.18µs ± 1%    7.26µs ± 1%  +1.05%  (p=0.000 n=40+36)
TimeFormat-4               13.1µs ± 1%    13.1µs ± 1%    ~     (p=0.698 n=37+40)
[Geo mean]                  733µs          732µs       -0.16%

name                     old speed      new speed      delta
GobDecode-4              7.34MB/s ± 1%  7.51MB/s ± 1%  +2.36%  (p=0.000 n=39+39)
GobEncode-4              8.51MB/s ± 1%  8.65MB/s ± 1%  +1.69%  (p=0.000 n=40+39)
Gzip-4                   4.66MB/s ± 1%  4.66MB/s ± 1%    ~     (p=0.783 n=40+40)
Gunzip-4                 31.9MB/s ± 1%  31.9MB/s ± 1%    ~     (p=0.466 n=40+40)
JSONEncode-4             7.61MB/s ± 1%  7.58MB/s ± 1%  -0.35%  (p=0.001 n=40+40)
JSONDecode-4             2.11MB/s ± 1%  2.10MB/s ± 1%  -0.52%  (p=0.000 n=38+39)
GoParse-4                1.24MB/s ± 2%  1.24MB/s ± 1%    ~     (p=0.556 n=40+39)
RegexpMatchEasy0_32-4    25.1MB/s ± 0%  25.1MB/s ± 1%    ~     (p=0.064 n=40+40)
RegexpMatchEasy0_1K-4     129MB/s ± 8%   129MB/s ± 5%    ~     (p=0.094 n=40+40)
RegexpMatchEasy1_32-4    25.0MB/s ± 1%  25.1MB/s ± 1%    ~     (p=0.331 n=40+40)
RegexpMatchEasy1_1K-4    97.7MB/s ± 4%  97.8MB/s ± 3%    ~     (p=0.851 n=40+40)
RegexpMatchMedium_32-4    490kB/s ± 0%   490kB/s ± 0%    ~     (all equal)
RegexpMatchMedium_1K-4   1.89MB/s ± 0%  1.90MB/s ± 1%  +0.12%  (p=0.031 n=40+40)
RegexpMatchHard_32-4     1.09MB/s ± 1%  1.09MB/s ± 1%    ~     (p=0.597 n=40+40)
RegexpMatchHard_1K-4     1.16MB/s ± 1%  1.16MB/s ± 1%    ~     (p=0.565 n=40+35)
Revcomp-4                31.1MB/s ± 2%  31.2MB/s ± 2%  +0.44%  (p=0.018 n=38+39)
Template-4               1.85MB/s ± 1%  1.85MB/s ± 1%    ~     (p=0.873 n=40+40)
[Geo mean]               6.66MB/s       6.67MB/s       +0.26%

Change-Id: Icc972d8a78ea06c32c3aa15733ff0537c82c2dc7
Reviewed-on: https://go-review.googlesource.com/58950
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>

7 years agocmd/compile: rename mapbucket to bmap
Martin Möhrmann [Tue, 29 Aug 2017 19:10:17 +0000 (21:10 +0200)]
cmd/compile: rename mapbucket to bmap

This makes the name of the function to construct the map bucket type
consistent with runtimes naming and the existing hmap function.

Change-Id: If4d8b4a54c92ab914d4adcb96022b48d8b5db631
Reviewed-on: https://go-review.googlesource.com/59915
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
7 years agocmd/compile: avoid padding for indirect map key or value on amd64p32
Martin Möhrmann [Tue, 29 Aug 2017 19:16:28 +0000 (21:16 +0200)]
cmd/compile: avoid padding for indirect map key or value on amd64p32

Padding needed for map buckets is dependent on the types used to
construct the map bucket. In case of indirect keys or values pointers
are used in the map bucket to the keys or values.

Change the map bucket padding calculation to take the alignment of
the key and value types used to construct the map bucket into account
instead of the original key and value type.

Since pointers are always 32bit aligned on amd64p32 this prevents
adding unneeded padding in case the key or value would have needed
64bit alignment without indirect referencing.

Change-Id: I7943448e882d269b5cff7e921a2a6f3430c50878
Reviewed-on: https://go-review.googlesource.com/60030
Reviewed-by: Keith Randall <khr@golang.org>
7 years agocmd/compile: simplify check for pointers in map bucket
Martin Möhrmann [Tue, 29 Aug 2017 19:32:41 +0000 (21:32 +0200)]
cmd/compile: simplify check for pointers in map bucket

Change-Id: Ie5e977c54f50274421962a7ca268ae71a6f19cef
Reviewed-on: https://go-review.googlesource.com/60050
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
7 years agoruntime: move dynamic makemap checks into cmd/compile
Martin Möhrmann [Tue, 29 Aug 2017 11:31:45 +0000 (13:31 +0200)]
runtime: move dynamic makemap checks into cmd/compile

Check map invariants, type size and alignments during compile time.

Keep runtime checks for reflect by adding them to reflect_makemap.

Change-Id: Ia28610626591bf7fafb7d5a1ca318da272e54879
Reviewed-on: https://go-review.googlesource.com/59914
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
7 years agocmd/link: unexport all peSection fields
Alex Brainman [Tue, 29 Aug 2017 03:30:17 +0000 (13:30 +1000)]
cmd/link: unexport all peSection fields

Change-Id: I83e168f0d1dd1897a0c02c0f1233e1054e93fb0f
Reviewed-on: https://go-review.googlesource.com/59791
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/link: introduce and use peFile.addDWARF
Alex Brainman [Tue, 29 Aug 2017 03:09:59 +0000 (13:09 +1000)]
cmd/link: introduce and use peFile.addDWARF

Change-Id: I2c217e03779772605aa0b5a33ef80459333eeebc
Reviewed-on: https://go-review.googlesource.com/59790
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/link: refactor container()
Hiroshi Ioka [Mon, 28 Aug 2017 06:00:49 +0000 (15:00 +0900)]
cmd/link: refactor container()

* rename to emitPcln because I'd like to skip not only container types,
  but also something like "go.buildid" in the future.
* return bool instead of int.

Change-Id: I029adb81292f7dd2fe98e69f3877c5c27f32ec30
Reviewed-on: https://go-review.googlesource.com/59415
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>

7 years agoarchive/tar: populate uname/gname/devmajor/devminor in FileInfoHeader
Joe Tsai [Mon, 28 Aug 2017 23:25:56 +0000 (16:25 -0700)]
archive/tar: populate uname/gname/devmajor/devminor in FileInfoHeader

We take a best-effort approach since information for these fields
are not well supported on all platforms.

user.LookupId+user.LookupGroupId is currently 15x slower than os.Stat.
For performance reasons, we perpetually cache username and groupname
with a sync.Map. As a result, this function will not be updated whenever
the user or group names are renamed in the OS. However, this is a better
situation than before, where those fields were not populated at all.

Change-Id: I3cec8291aed7675dea89ee1cbda92bd493c8831f
Reviewed-on: https://go-review.googlesource.com/59531
Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agosyscall: drop dummy byte for oob in unixgram SendmsgN
Luca Bruno [Thu, 15 Jun 2017 11:35:43 +0000 (11:35 +0000)]
syscall: drop dummy byte for oob in unixgram SendmsgN

This commit relaxes SendmsgN behavior of introducing a dummy 1-byte
payload when sending ancillary-only messages.
The fake payload is not needed for SOCK_DGRAM type sockets, and actually
breaks interoperability with other fd-passing software (journald is one
known example). This introduces an additional check to avoid injecting
dummy payload in such case.

Full reference at https:/golang.org/issue/6476#issue-51285243

Fixes #6476

Change-Id: I19a974b4e7920e002bd0556259ab766572358520
Reviewed-on: https://go-review.googlesource.com/45872
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agocmd/link: remove unused SFILE and FileSym
Ian Lance Taylor [Tue, 29 Aug 2017 00:49:37 +0000 (17:49 -0700)]
cmd/link: remove unused SFILE and FileSym

Change-Id: Iec610753052abcf6941a1cd16a9256ee9d689732
Reviewed-on: https://go-review.googlesource.com/59750
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Hiroshi Ioka <hirochachacha@gmail.com>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
7 years agocmd/link: remove dead code
Hiroshi Ioka [Mon, 28 Aug 2017 06:07:19 +0000 (15:07 +0900)]
cmd/link: remove dead code

Change-Id: I8a54235c8b7bf1010f19d0d358cd4f76fc911d28
Reviewed-on: https://go-review.googlesource.com/59416
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agocmd/link: unexport Elfadddynsym
Hiroshi Ioka [Mon, 28 Aug 2017 05:57:47 +0000 (14:57 +0900)]
cmd/link: unexport Elfadddynsym

Change-Id: Ifc66bd8c32e788f35da3bd105bcdcfd04bd3dabc
Reviewed-on: https://go-review.googlesource.com/59414
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>

7 years agocmd/link: refactor addlib
Hiroshi Ioka [Mon, 28 Aug 2017 06:10:25 +0000 (15:10 +0900)]
cmd/link: refactor addlib

* extract pkgname() and findlib() from the function for #18190.
* rename const pkgname to const pkgdef to avoid confliction.

Change-Id: Ie62509bfbddcf19cf92b5b12b598679a069e6e74
Reviewed-on: https://go-review.googlesource.com/59417
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agonet/mail: parse cases when phrase has special chars without quotes
Guilherme Rezende [Mon, 24 Jul 2017 20:04:02 +0000 (17:04 -0300)]
net/mail: parse cases when phrase has special chars without quotes

Updates #21018

Change-Id: I00b6667fb5fee78559a391815f58760a2baea90e
Reviewed-on: https://go-review.googlesource.com/50911
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Avelino <t@avelino.xxx>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agoruntime,cmd/trace: trace GC STW events
Austin Clements [Fri, 21 Jul 2017 18:25:28 +0000 (14:25 -0400)]
runtime,cmd/trace: trace GC STW events

Right now we only kind of sort of trace GC STW events. We emit events
around mark termination, but those start well after stopping the world
and end before starting it again, and we don't emit any events for
sweep termination.

Fix this by generalizing EvGCScanStart/EvGCScanDone. These were
already re-purposed to indicate mark termination (despite the names).
This commit renames them to EvGCSTWStart/EvGCSTWDone, adds an argument
to indicate the STW reason, and shuffles the runtime to generate them
right before stopping the world and right after starting the world,
respectively.

These events will make it possible to generate precise minimum mutator
utilization (MMU) graphs and could be useful in detecting
non-preemptible goroutines (e.g., #20792).

Change-Id: If95783f370781d8ef66addd94886028103a7c26f
Reviewed-on: https://go-review.googlesource.com/55411
Reviewed-by: Rick Hudson <rlh@golang.org>
7 years agomime: ignore key on ParseMediaType when value don't pass RFC 2231 check
Guilherme Rezende [Tue, 29 Aug 2017 16:14:05 +0000 (13:14 -0300)]
mime: ignore key on ParseMediaType when value don't pass RFC 2231 check

Also add more test cases.

Change-Id: I53cc6484b25560fc7a4b5d44e73bbd9270c25769
Reviewed-on: https://go-review.googlesource.com/59950
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agoall: join some chained ifs to unindent code
Daniel Martí [Mon, 21 Aug 2017 20:23:14 +0000 (22:23 +0200)]
all: join some chained ifs to unindent code

Found with mvdan.cc/unindent. It skipped the cases where parentheses
would need to be added, where comments would have to be moved elsewhere,
or where actions and simple logic would mix.

One of them was of the form "err != nil && err == io.EOF", so the first
part was removed.

Change-Id: Ie504c2b03a2c87d10ecbca1b9270069be1171b91
Reviewed-on: https://go-review.googlesource.com/57690
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agoflag: document that custom usage functions are free to call os.Exit
Rob Pike [Tue, 29 Aug 2017 03:46:38 +0000 (13:46 +1000)]
flag: document that custom usage functions are free to call os.Exit

Some custom usage functions call it for clarity; others rely on the default
behavior, which makes an explicit call redundant. Document that it's
safe to be explicit.

Fixes #21671.

Change-Id: I08e9f47265582821cfd35995dff0c589cd85809d
Reviewed-on: https://go-review.googlesource.com/59792
Reviewed-by: Dominik Honnef <dominik@honnef.co>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agoruntime/trace: improve package doc
Hana Kim [Mon, 28 Aug 2017 21:34:33 +0000 (17:34 -0400)]
runtime/trace: improve package doc

Explaining how to enable tracing.

Change-Id: Ic8391cb290742b4dc1efab15deba85853e182b4d
Reviewed-on: https://go-review.googlesource.com/59612
Reviewed-by: Heschi Kreinick <heschi@google.com>
7 years agoos: don't assume /bin/pwd in test, find it in $PATH
Ron Minnich [Tue, 29 Aug 2017 16:59:27 +0000 (09:59 -0700)]
os: don't assume /bin/pwd in test, find it in $PATH

There are several distros now that no longer have /bin.
Instead of assuming /bin/pwd, we will look for it in $PATH.

Fixes #21684.

Change-Id: I61478326500edeadc3c26803990550dad00c7971
Signed-off-by: Ron Minnich <rminnich@gmail.com>
Reviewed-on: https://go-review.googlesource.com/60010
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agoruntime: call sigtrampgo on solaris
Elias Naur [Tue, 29 Aug 2017 09:03:30 +0000 (11:03 +0200)]
runtime: call sigtrampgo on solaris

CL 57291 broke on solaris because it depends on signal forwarding
working for signals raised by dieFromSignal.
Call sigtrampgo instead of sighandler directly, like the other
unix platforms.

Fixes the solaris builders.

Change-Id: I6bf314c436d1edeaecc4b03f15a9155270919524
Reviewed-on: https://go-review.googlesource.com/59811
Run-TryBot: Elias Naur <elias.naur@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/cgo: update documentation on implementation details
Hiroshi Ioka [Tue, 29 Aug 2017 08:28:15 +0000 (17:28 +0900)]
cmd/cgo: update documentation on implementation details

Change-Id: Iec771d5bbdf510b6c5ec17a614da90e7974a6348
Reviewed-on: https://go-review.googlesource.com/59870
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agotime: fix documentation of Round, Truncate behavior for d <= 0
Dmitri Shuralyov [Thu, 17 Aug 2017 23:30:34 +0000 (19:30 -0400)]
time: fix documentation of Round, Truncate behavior for d <= 0

Saying that they return t unchanged is misleading, because they return
a modified t, stripped of any monotonic clock reading, as of Go 1.9.

Fixes #21485.

Change-Id: Icddf8813aed3d687fcefcd2fe542829438be6a0a
Reviewed-on: https://go-review.googlesource.com/56690
Reviewed-by: Avelino <t@avelino.xxx>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agoruntime/trace: add example about trace.Start/Stop
André Carvalho [Tue, 25 Jul 2017 22:18:58 +0000 (19:18 -0300)]
runtime/trace: add example about trace.Start/Stop

This commit adds an example to the runtime/trace package
on how to use the trace.Start and trace.Stop functions
to trace the execution of a Go program and write
its trace output to a file.

Change-Id: Idf920398f1c3b9d185af9df5ce9293f2361db022
Reviewed-on: https://go-review.googlesource.com/51170
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
7 years agoruntime: add comments to race annotations
Dmitry Vyukov [Wed, 23 Aug 2017 18:01:48 +0000 (20:01 +0200)]
runtime: add comments to race annotations

Change-Id: Icfb68e73ac38d0a0acc0cda1e41f9e9c5b75ecf5
Reviewed-on: https://go-review.googlesource.com/58110
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/compile: make more use of exported position information
Matthew Dempsky [Mon, 28 Aug 2017 20:02:58 +0000 (13:02 -0700)]
cmd/compile: make more use of exported position information

Updates #19683.

Change-Id: I64b3b93a3ab14518a5376e1270bdd2a94bdd67ef
Reviewed-on: https://go-review.googlesource.com/59611
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
7 years agoruntime: don't publish new itab table before growth is finished
Marvin Stenger [Wed, 16 Aug 2017 01:39:13 +0000 (03:39 +0200)]
runtime: don't publish new itab table before growth is finished

This change could improve the hit rate on itabTable during growth.

While we are here patch comments to refer to existing functions.

Change-Id: I76f81c860a3d6107e077e7e3932550858a8b7651
Reviewed-on: https://go-review.googlesource.com/55912
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
7 years agocmd/asm, cmd/internal/obj/ppc64: add ISA 3.0 instructions
Carlos Eduardo Seo [Tue, 16 May 2017 21:55:54 +0000 (16:55 -0500)]
cmd/asm, cmd/internal/obj/ppc64: add ISA 3.0 instructions

This change adds new ppc64 instructions from the POWER9 ISA. This includes
compares, loads, maths, register moves and the new random number generator and
copy/paste facilities.

Change-Id: Ife3720b90f5af184ff115bbcdcbce5c1302d39b6
Reviewed-on: https://go-review.googlesource.com/53930
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
7 years agocmd/vet: unexported Stringer and error fields cannot be formatted
Aliaksandr Valialkin [Mon, 5 Jun 2017 10:02:32 +0000 (13:02 +0300)]
cmd/vet: unexported Stringer and error fields cannot be formatted

According to CL 31817, fmt cannot invoke String or Error methods
on unexported struct fields.

Fixes #17798.

Change-Id: I0d516577298bc36daa9a94313c3874d64dc079e6
Reviewed-on: https://go-review.googlesource.com/44831
Reviewed-by: Rob Pike <r@golang.org>
7 years agoruntime: forward crashing signals to late handlers
Elias Naur [Sat, 19 Aug 2017 14:59:19 +0000 (16:59 +0200)]
runtime: forward crashing signals to late handlers

CL 49590 made it possible for external signal handlers to catch
signals from a crashing Go process. This CL extends that support
to handlers registered after the Go runtime has initialized.

Updates #20392 (and possibly fix it).

Change-Id: I18eccd5e958a505f4d1782a7fc51c16bd3a4ff9c
Reviewed-on: https://go-review.googlesource.com/57291
Run-TryBot: Elias Naur <elias.naur@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agoruntime: fix memhash64 on big endian systems
Michael Munday [Tue, 29 Aug 2017 04:10:17 +0000 (05:10 +0100)]
runtime: fix memhash64 on big endian systems

Fixes #21677.

Change-Id: I869dee5f43df5d87d86922681726297e3024c562
Reviewed-on: https://go-review.googlesource.com/59810
Run-TryBot: Michael Munday <mike.munday@ibm.com>
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agocmd/link: make it compile again (fixes build)
Alex Brainman [Tue, 29 Aug 2017 02:21:15 +0000 (12:21 +1000)]
cmd/link: make it compile again (fixes build)

CL 59375 changed Reloc.Done to bool, but that change
got lost in pe.go while merging. Restore that change.

Change-Id: Ie5a89e85579cdc9282f504fefd56355cfeb49389
Reviewed-on: https://go-review.googlesource.com/59711
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
7 years agocmd/vet: add test that copylock catches copying a sync.Map
Manish Goregaokar [Sat, 26 Aug 2017 06:10:50 +0000 (23:10 -0700)]
cmd/vet: add test that copylock catches copying a sync.Map

fixes #21635

Change-Id: I78716d47b6a930074e5394f7171d5f545dfba0bc
Reviewed-on: https://go-review.googlesource.com/59690
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Rob Pike <r@golang.org>
Run-TryBot: Bryan Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agocmd/link: introduce and use peFile.writeOptionalHeader
Alex Brainman [Mon, 28 Aug 2017 03:52:11 +0000 (13:52 +1000)]
cmd/link: introduce and use peFile.writeOptionalHeader

Change-Id: I27b33f2425281bc1790528ae514d99a468ad7fce
Reviewed-on: https://go-review.googlesource.com/59429
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/link: introduce and use peFile.dataDirectory
Alex Brainman [Mon, 28 Aug 2017 03:49:15 +0000 (13:49 +1000)]
cmd/link: introduce and use peFile.dataDirectory

Change-Id: I61f64287a488ed82e71639540697b6ade5a0426a
Reviewed-on: https://go-review.googlesource.com/59428
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/link: introduce and use peFile.writeFileHeader
Alex Brainman [Mon, 28 Aug 2017 03:45:56 +0000 (13:45 +1000)]
cmd/link: introduce and use peFile.writeFileHeader

Change-Id: I1324b69ab9edb870589197fa601b5764634d42a4
Reviewed-on: https://go-review.googlesource.com/59427
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/link: introduce and use peFile.writeSymbolTableAndStringTable
Alex Brainman [Mon, 28 Aug 2017 03:42:06 +0000 (13:42 +1000)]
cmd/link: introduce and use peFile.writeSymbolTableAndStringTable

Change-Id: I506f5e146f3b5bf359d6932a85ac5572d3a3f103
Reviewed-on: https://go-review.googlesource.com/59426
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/link: introduce and use peFile.writeSymbols
Alex Brainman [Mon, 28 Aug 2017 03:39:19 +0000 (13:39 +1000)]
cmd/link: introduce and use peFile.writeSymbols

Change-Id: If629b19cebc6ae8dfbf603dcd7f2dd3d0046a935
Reviewed-on: https://go-review.googlesource.com/59425
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/link: simplify writePESymTableRecords
Alex Brainman [Mon, 28 Aug 2017 03:35:21 +0000 (13:35 +1000)]
cmd/link: simplify writePESymTableRecords

Change-Id: I2da982fdef826aaecb86431f7d80ffc0fb2c4337
Reviewed-on: https://go-review.googlesource.com/59424
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/link: introduce and use peFile.mapToPESection
Alex Brainman [Mon, 28 Aug 2017 03:32:19 +0000 (13:32 +1000)]
cmd/link: introduce and use peFile.mapToPESection

Change-Id: I598e9da5587908f39faa13c11d2b42054f5a632d
Reviewed-on: https://go-review.googlesource.com/59423
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/link: introduce and use peFile.writeSymbol
Alex Brainman [Mon, 28 Aug 2017 03:29:28 +0000 (13:29 +1000)]
cmd/link: introduce and use peFile.writeSymbol

Change-Id: I9fcae7bfd647b52d9b4f36f04710ba7921609c02
Reviewed-on: https://go-review.googlesource.com/59422
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/link: move perelocsect into peFile.emitRelocations (no code changed)
Alex Brainman [Mon, 28 Aug 2017 03:25:45 +0000 (13:25 +1000)]
cmd/link: move perelocsect into peFile.emitRelocations (no code changed)

Change-Id: I807412bd743d544195aaf9d720f81b128b4636b3
Reviewed-on: https://go-review.googlesource.com/59421
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/link: introduce peFile.ctorsSect and use it in peFile.emitRelocations
Alex Brainman [Mon, 28 Aug 2017 03:18:03 +0000 (13:18 +1000)]
cmd/link: introduce peFile.ctorsSect and use it in peFile.emitRelocations

Change-Id: I65058c150a19aa4e3083fd8754d08ea23721844b
Reviewed-on: https://go-review.googlesource.com/59420
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/link: introduce and use peFile.emitRelocations
Alex Brainman [Mon, 28 Aug 2017 03:14:43 +0000 (13:14 +1000)]
cmd/link: introduce and use peFile.emitRelocations

Change-Id: I2458d1391af063d99ba1e446bcf12f7c41ae5f6b
Reviewed-on: https://go-review.googlesource.com/59419
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/link: introduce and use peSection.emitRelocations
Alex Brainman [Mon, 28 Aug 2017 03:04:27 +0000 (13:04 +1000)]
cmd/link: introduce and use peSection.emitRelocations

Change-Id: I2bebee5566ee07786695f147c27661e69337a0f7
Reviewed-on: https://go-review.googlesource.com/59418
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/link: fix warning for buildmode=plugin on darwin/amd64
Hiroshi Ioka [Sun, 27 Aug 2017 10:09:18 +0000 (19:09 +0900)]
cmd/link: fix warning for buildmode=plugin on darwin/amd64

Without this CL, the system linker complains about absolute addressing
in type..eqfunc.*.

Updates #18190

Change-Id: I68db37a7f4c96b16a9c13baffc0f043a3048df6d
Reviewed-on: https://go-review.googlesource.com/59373
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agodebug/macho: add missing file flags
Kunpei Sakai [Mon, 28 Aug 2017 06:28:12 +0000 (15:28 +0900)]
debug/macho: add missing file flags

Fixes #21414

Change-Id: I8b25d416e6ead087b4a9965e8fa1a7f59ff07291
Reviewed-on: https://go-review.googlesource.com/59290
Reviewed-by: Hiroshi Ioka <hirochachacha@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agocmd/cgo: avoid using common names for sniffing
Hiroshi Ioka [Mon, 28 Aug 2017 22:39:57 +0000 (07:39 +0900)]
cmd/cgo: avoid using common names for sniffing

Current code uses names like "x" and "s" which can conflict with user's
code easily. Use cryptographic names.

Fixes #21668

Change-Id: Ib6d3d6327aa5b92d95c71503d42e3a79d96c8e15
Reviewed-on: https://go-review.googlesource.com/59710
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/compile: merge tempnamel into tempAt
Matthew Dempsky [Fri, 25 Aug 2017 22:24:14 +0000 (15:24 -0700)]
cmd/compile: merge tempnamel into tempAt

Passes toolstash-check.

Change-Id: I01ed1c04be5a23756742d461f13f1e587ea7ecb8
Reviewed-on: https://go-review.googlesource.com/59610
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
7 years agocmd/compile: add Type.NumResults and friends
Josh Bleecher Snyder [Tue, 2 May 2017 16:16:22 +0000 (09:16 -0700)]
cmd/compile: add Type.NumResults and friends

Passes toolstash-check.

Change-Id: Id62bacff13fbd30de62b925d97a4e7bee1c66120
Reviewed-on: https://go-review.googlesource.com/59331
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
7 years agocmd/doc: search for packages in the two-arg case
Rob Pike [Mon, 28 Aug 2017 05:33:11 +0000 (15:33 +1000)]
cmd/doc: search for packages in the two-arg case

When given one argument, as in

go doc binary.BigEndian

doc would search for the package, but when given two, as in

go doc binary BigEndian

it would not. Fix the inconsistency.

Fixes #18697
Fixes #18664

Change-Id: Ib59dc483e8d4f91e6061c77a5ec24d0a50e115f0
Reviewed-on: https://go-review.googlesource.com/59413
Reviewed-by: Aliaksandr Valialkin <valyala@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agocmd/compile: avoid generating large offsets
Keith Randall [Mon, 28 Aug 2017 19:57:52 +0000 (12:57 -0700)]
cmd/compile: avoid generating large offsets

The assembler barfs on large offsets. Make sure that all the
instructions that need to have their offsets in an int32
  1) check on any rule that computes offsets for such instructions
  2) change their aux fields so the check builder checks it.

The assembler also silently misassembled offsets between 1<<31
and 1<<32. Add a check in the assembler to barf on those as well.

Fixes #21655

Change-Id: Iebf24bf10f9f37b3ea819ceb7d588251c0f46d7d
Reviewed-on: https://go-review.googlesource.com/59630
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
7 years agocmd/trace: add -d that prints parsed traces
Hana Kim [Fri, 25 Aug 2017 16:56:29 +0000 (12:56 -0400)]
cmd/trace: add -d that prints parsed traces

This is useful when debugging the tool.

Some tweaks on logging: log the webserver address, log.Print instead
of log.Printf when possible.

Change-Id: Iaf71b6523b40dc13795511784d48eacf0f5a396a
Reviewed-on: https://go-review.googlesource.com/59570
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
7 years agoruntime: specialize memhash32 and memhash64
Martin Möhrmann [Sun, 27 Aug 2017 12:05:11 +0000 (14:05 +0200)]
runtime: specialize memhash32 and memhash64

AMD64 with AES support disabled:
name                old time/op    new time/op    delta
MapPopulate/1         78.0ns ± 1%    75.5ns ± 1%   -3.17%  (p=0.000 n=10+9)
MapPopulate/10         764ns ± 2%     673ns ± 2%  -11.91%  (p=0.000 n=10+10)
MapPopulate/100       9.52µs ± 1%    8.54µs ± 1%  -10.37%  (p=0.000 n=8+10)
MapPopulate/1000       116µs ± 2%     103µs ± 1%  -10.40%  (p=0.000 n=10+8)
MapPopulate/10000     1.01ms ± 1%    0.90ms ± 1%  -10.70%  (p=0.000 n=10+10)
MapPopulate/100000    9.81ms ± 1%    8.67ms ± 2%  -11.54%  (p=0.000 n=10+10)

386 with AES support disabled:
name                old time/op    new time/op    delta
MapPopulate/1         95.3ns ± 1%    90.6ns ± 1%  -4.95%  (p=0.000 n=10+9)
MapPopulate/10         983ns ± 2%     912ns ± 1%  -7.18%  (p=0.000 n=10+10)
MapPopulate/100       11.9µs ± 2%    11.2µs ± 1%  -6.01%  (p=0.000 n=10+10)
MapPopulate/1000       140µs ± 1%     131µs ± 1%  -6.19%  (p=0.000 n=10+10)
MapPopulate/10000     1.26ms ± 2%    1.18ms ± 1%  -5.93%  (p=0.000 n=9+10)
MapPopulate/100000    12.1ms ± 2%    11.4ms ± 1%  -5.48%  (p=0.000 n=10+10)

Fixes #21539

Change-Id: Ice128c947c9a6a294800d6a5250d82045eb70b55
Reviewed-on: https://go-review.googlesource.com/59352
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
7 years agodoc/1.9: add mention of net/http.LocalAddrContextKey
Tom Bergan [Mon, 28 Aug 2017 18:09:37 +0000 (11:09 -0700)]
doc/1.9: add mention of net/http.LocalAddrContextKey

Fixes #21603

Change-Id: I42fb7ea2dd7f6d6a201171055beaeda68c26b823
Reviewed-on: https://go-review.googlesource.com/59530
Reviewed-by: Ian Lance Taylor <iant@golang.org>
7 years agoruntime: only clear key string's pointer in mapdelete_faststr
Josh Bleecher Snyder [Sat, 26 Aug 2017 13:55:34 +0000 (06:55 -0700)]
runtime: only clear key string's pointer in mapdelete_faststr

Change-Id: I0360d294868ec4423e4ae036009fac4e72425c9c
Reviewed-on: https://go-review.googlesource.com/59152
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
7 years agoruntime: remove t.indirectvalue handling in fast evacuation routines
Josh Bleecher Snyder [Tue, 22 Aug 2017 13:27:48 +0000 (06:27 -0700)]
runtime: remove t.indirectvalue handling in fast evacuation routines

Maps with indirect values use the generic map routines.

Change-Id: Ib211e93f1dacefb988ba3d279f92a13065168079
Reviewed-on: https://go-review.googlesource.com/59135
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
7 years agoruntime: speed up key copying in specialized evacuate routines
Josh Bleecher Snyder [Sat, 19 Aug 2017 14:30:12 +0000 (07:30 -0700)]
runtime: speed up key copying in specialized evacuate routines

Similar to CL 59110.

Change-Id: Ia2858541c86a44b105eacbca9a46b1044632c5ca
Reviewed-on: https://go-review.googlesource.com/59134
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
7 years agoruntime: remove handling of indirect key types in evacuate_fastX
Josh Bleecher Snyder [Sat, 19 Aug 2017 04:19:12 +0000 (21:19 -0700)]
runtime: remove handling of indirect key types in evacuate_fastX

None of the mapfast key types are indirect.

Change-Id: I1fb2682257567ee69504082a6cdad63c99916671
Reviewed-on: https://go-review.googlesource.com/59133
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
7 years agoruntime: remove handling of non-reflexive key types in evacuate_fastX
Josh Bleecher Snyder [Sat, 19 Aug 2017 04:17:40 +0000 (21:17 -0700)]
runtime: remove handling of non-reflexive key types in evacuate_fastX

All of the mapfast key types are reflexive.

Change-Id: I8595aed2a9d945cda1b5d08e2067dce0f1c0d585
Reviewed-on: https://go-review.googlesource.com/59132
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
7 years agoruntime: replace t.keysize with fixed key size in evacuate_fastX
Josh Bleecher Snyder [Sat, 19 Aug 2017 04:15:44 +0000 (21:15 -0700)]
runtime: replace t.keysize with fixed key size in evacuate_fastX

Change-Id: I89c3c3b21d7a4acbc49b14a52ac8d9a5861c0c39
Reviewed-on: https://go-review.googlesource.com/59131
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
7 years agoruntime: add specialized copies of growWork and evacuate
Josh Bleecher Snyder [Sat, 19 Aug 2017 04:13:09 +0000 (21:13 -0700)]
runtime: add specialized copies of growWork and evacuate

The newly added routines are exact copies of the generic routines,
except for the function names and that growWork_fastX calls evacuate_fastX.

Actual optimization will happen in subsequent CLs.
This is intended to ease reviewing.

Change-Id: I52ef7dd40b2bdfc9cba2496544c0604e6e71cf7f
Reviewed-on: https://go-review.googlesource.com/59130
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
7 years agonet/http: Set a timeout on Request.Context when using TimeoutHandler
Michael Fraenkel [Thu, 22 Jun 2017 01:58:42 +0000 (21:58 -0400)]
net/http: Set a timeout on Request.Context when using TimeoutHandler

In TimeoutHandler, use a request whose context has been configured with
the handler's timeout

Fixes #20712

Change-Id: Ie670148f85fdad46841ff29232042309e15665ae
Reviewed-on: https://go-review.googlesource.com/46412
Run-TryBot: Tom Bergan <tombergan@google.com>
Reviewed-by: Tom Bergan <tombergan@google.com>
7 years agocmd/compile: use keyed struct for asm tests
Keith Randall [Mon, 28 Aug 2017 16:55:18 +0000 (09:55 -0700)]
cmd/compile: use keyed struct for asm tests

Just to make it clearer which regexps are positive and which
regexps are negative.

Change-Id: Ia190e89be28048fcae2491506f552afad90a5f85
Reviewed-on: https://go-review.googlesource.com/59490
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
Reviewed-by: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agocmd/compile/internal/ssa: Mark ADD[Q|L]const as rematerializeable
Ilya Tocar [Wed, 9 Aug 2017 18:43:34 +0000 (13:43 -0500)]
cmd/compile/internal/ssa: Mark ADD[Q|L]const as rematerializeable

We can rematerialize only ops that have SP or SB as their only argument.
There are some ADDQconst(SP) that can be rematerialized, but are spilled/filled instead,
so mark addconst as rematerializeable. This shaves ~1kb from go tool.

Change-Id: Ib4cf4fe5f2ec9d3d7e5f0f77f1193eba66ca2f08
Reviewed-on: https://go-review.googlesource.com/54393
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
7 years agosort: add examples for IntsAreSorted, Float64s and Float64sAreSorted
Karsten Köhler [Mon, 21 Aug 2017 19:13:53 +0000 (21:13 +0200)]
sort: add examples for IntsAreSorted, Float64s and Float64sAreSorted

Change-Id: Ib4883470bd2271e546daea3156d4a48dd873aaa3
Reviewed-on: https://go-review.googlesource.com/57670
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

7 years agomisc/ios,src/iostest.bash: support GOIOS_DEVICE_ID
Elias Naur [Wed, 23 Aug 2017 11:35:24 +0000 (13:35 +0200)]
misc/ios,src/iostest.bash: support GOIOS_DEVICE_ID

When running multiple iOS builds on the same host, GOIOS_DEVICE_ID
is used to distinguish the devices. To improve support,

- Only restart the particular device when invoking iostest.bash
with the -restart flag.
- Make the exec wrapper lock file per-device.

For the iOS builder.

Change-Id: Id6f222981f25036399a43c3202a393dba89d87cb
Reviewed-on: https://go-review.googlesource.com/57970
Run-TryBot: Elias Naur <elias.naur@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>