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41040 Commits

Author SHA1 Message Date
Keisuke Kishimoto
844e642392 syscall: minor cleanup of duplicated code
Call the Nano methods of Timespec and Timeval in TimespecToNsec and
TimevalToNsec respectively, instead of duplicating the implementation.

Change-Id: I17551ea54c59c1e45ce472e029c625093a67251a
GitHub-Last-Rev: fecf43d163
GitHub-Pull-Request: golang/go#33390
Reviewed-on: https://go-review.googlesource.com/c/go/+/188397
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-09 03:11:53 +00:00
Ainar Garipov
0efbd10157 all: fix typos
Use the following (suboptimal) script to obtain a list of possible
typos:

  #!/usr/bin/env sh

  set -x

  git ls-files |\
    grep -e '\.\(c\|cc\|go\)$' |\
    xargs -n 1\
    awk\
    '/\/\// { gsub(/.*\/\//, ""); print; } /\/\*/, /\*\// { gsub(/.*\/\*/, ""); gsub(/\*\/.*/, ""); }' |\
    hunspell -d en_US -l |\
    grep '^[[:upper:]]\{0,1\}[[:lower:]]\{1,\}$' |\
    grep -v -e '^.\{1,4\}$' -e '^.\{16,\}$' |\
    sort -f |\
    uniq -c |\
    awk '$1 == 1 { print $2; }'

Then, go through the results manually and fix the most obvious typos in
the non-vendored code.

Change-Id: I3cb5830a176850e1a0584b8a40b47bde7b260eae
Reviewed-on: https://go-review.googlesource.com/c/go/+/193848
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-09-08 17:28:20 +00:00
Elias Naur
83a78eb911 syscall: re-generate zsyscall_darwin_arm*.s
I missed that in CL 193843.

Updates #34133

Change-Id: I70b420f022cc7f8289f07375bfc2ade20cf3ffe7
Reviewed-on: https://go-review.googlesource.com/c/go/+/193846
Run-TryBot: Elias Naur <mail@eliasnaur.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2019-09-08 09:20:26 +00:00
Elias Naur
2711fababd net,os: disable more sysctl tests on iOS
Updates #34133

Change-Id: I27c75993176cf876f2d80f70982528258c509b68
Reviewed-on: https://go-review.googlesource.com/c/go/+/193845
Run-TryBot: Elias Naur <mail@eliasnaur.com>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2019-09-07 22:40:14 +00:00
smasher164
141b09726d net/http: make copyValues append instead of calling Add
This results in a performance boost:

name          old time/op    new time/op    delta
CopyValues-4    3.46µs ± 3%    1.53µs ± 3%  -55.85%  (p=0.000 n=18+19)

name          old alloc/op   new alloc/op   delta
CopyValues-4    1.52kB ± 0%    0.74kB ± 0%  -51.58%  (p=0.000 n=20+20)

name          old allocs/op  new allocs/op  delta
CopyValues-4      24.0 ± 0%      11.0 ± 0%  -54.17%  (p=0.000 n=20+20)

Fixes #33744.

Change-Id: Ibc653fb076a9a6aaa775fcc9ca720fb90e68cf96
Reviewed-on: https://go-review.googlesource.com/c/go/+/191057
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
2019-09-07 22:21:30 +00:00
Elias Naur
a5025fdcde log/syslog: skip unsupported tests on iOS
CL 193843 disabled sysctl on iOS. This change disables two tests that
rely on sysctl.

Updates #34133

Change-Id: I7c569a1992a50ad6027a294c1fd535cccddcfc4e
Reviewed-on: https://go-review.googlesource.com/c/go/+/193844
Run-TryBot: Elias Naur <mail@eliasnaur.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
2019-09-07 21:44:30 +00:00
Elias Naur
78d9949103 syscall: disable sysctl on iOS
Sysctl is blocked by the App Store submission checks.

Fixes #34133

Change-Id: I9e83cf87e942d6249e9bb67a95dba230e44badd9
Reviewed-on: https://go-review.googlesource.com/c/go/+/193843
Run-TryBot: Elias Naur <mail@eliasnaur.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
2019-09-07 18:43:44 +00:00
Joel Sing
7ef890db91 cmd/internal/obj: instructions and registers for RISC-V
Start implementing an assembler for RISC-V - this provides register
definitions and instruction mnemonics as defined in the RISC-V
Instruction Set Manual, along with instruction encoding.

The instruction encoding is generated by the parse_opcodes script with
the "opcodes" and "opcodes-pseudo" files from (`make inst.go`):

  https://github.com/riscv/riscv-opcodes

This is based on the riscv-go port:

  https://github.com/riscv/riscv-go

Contributors to the riscv-go port are:

  Amol Bhave <ammubhave@gmail.com>
  Benjamin Barenblat <bbaren@google.com>
  Josh Bleecher Snyder <josharian@gmail.com>
  Michael Pratt <michael@pratt.im>
  Michael Yenik <myenik@google.com>
  Ronald G. Minnich <rminnich@gmail.com>
  Stefan O'Rear <sorear2@gmail.com>

This port has been updated to Go 1.13:

  https://github.com/4a6f656c/riscv-go

Updates #27532

Change-Id: I257b6de87e9864df61a2b0ce9be15968c1227b49
Reviewed-on: https://go-review.googlesource.com/c/go/+/193677
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2019-09-07 13:24:59 +00:00
Joel Sing
112a72a020 cmd/asm/internal/arch: consolidate LinkArch handling
Rather than manually setting the LinkArch for each case, pass the correct
*obj.LinkArch to the arch* function, as is already done for archX86().

Change-Id: I4cf950780aa30a1385e785fb1d26edacb99bda79
Reviewed-on: https://go-review.googlesource.com/c/go/+/193818
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-07 09:43:04 +00:00
Emmanuel T Odeke
3a067f71e9 net: handle >=2GiB files with sendfile on Windows
CL 187037 applied a fix to handle the case where
files larger than 2GiB were not being sendfile-d,
in one shot, rejecting any files whose size was
larger than the 2GiB.

This CL allows files that are larger than limit
by SendFile-ing in chunks of upto 2GiB per chunk.

The test has been excluded as testing with 3GB
requires creating a local file, flushing it
and then doing sendfile which takes a while
and could cause flakes on computers without capacity,
but the test can be retroactively accessed at:
https://go-review.googlesource.com/c/go/+/192518/8/src/net/sendfile_windows_test.go

Fixes #33193.

Change-Id: If57c25bc289aec82b748890ac1ac4f55798d6a5e
Reviewed-on: https://go-review.googlesource.com/c/go/+/192518
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
2019-09-07 08:46:41 +00:00
Matthew Dempsky
581526ce96 cmd/compile: rewrite untyped constant conversion logic
This CL detangles the hairy mess that was convlit+defaultlit. In
particular, it makes the following changes:

1. convlit1 now follows the standard typecheck behavior of setting
"n.Type = nil" if there's an error. Notably, this means for a lot of
test cases, we now avoid reporting useless follow-on error messages.
For example, after reporting that "1 << s + 1.0" has an invalid shift,
we no longer also report that it can't be assigned to string.

2. Previously, assignconvfn had some extra logic for trying to
suppress errors from convlit/defaultlit so that it could provide its
own errors with better context information. Instead, this extra
context information is now passed down into convlit1 directly.

3. Relatedly, this CL also removes redundant calls to defaultlit prior
to assignconv. As a consequence, when an expression doesn't make sense
for a particular assignment (e.g., assigning an untyped string to an
integer), the error messages now say "untyped string" instead of just
"string". This is more consistent with go/types behavior.

4. defaultlit2 is now smarter about only trying to convert pairs of
untyped constants when it's likely to succeed. This allows us to
report better error messages for things like 3+"x"; instead of "cannot
convert 3 to string" we now report "mismatched types untyped number
and untyped string".

Passes toolstash-check.

Change-Id: I26822a02dc35855bd0ac774907b1cf5737e91882
Reviewed-on: https://go-review.googlesource.com/c/go/+/187657
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-09-06 23:15:48 +00:00
Matthew Dempsky
ad1f2c9618 cmd/compile: use CTNIL for pointer-typed OLITERALs
We used to be more aggressive about constant folding in the frontend,
handling expressions that the Go spec does not consider constant;
e.g., "(*int)(unsafe.Pointer(uintptr(200)))". However, that led to a
lot of subtle Go spec conformance issues, so we've since abandoned
that effort (CL 151320), leaving SSA to handle these cases instead.

As such, the only time we now end up with pointer-typed OLITERALs is
when "nil" is implicitly converted to a pointer-typed variable.
Instead of representing these OLITERALs with an CTINT of 0, we can
just use CTNIL.

Saves a few bytes of memory and lines of code.

Change-Id: Ibc5c756b992fdc89c3bdaf4fda3aa352e8e2b101
Reviewed-on: https://go-review.googlesource.com/c/go/+/193437
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-09-06 22:55:17 +00:00
Matthew Dempsky
e6ba19f913 Revert "cmd/compile: improve errors for invalid conversions of consts"
This reverts commit 2da9c3e0f9.

Reason for revert: while the new error messages are more informative,
they're not strictly correct. This CL also conflicts with CL 187657.

Change-Id: I1c36cf7e86c2f35ee83a4f98918ee38aa1f59965
Reviewed-on: https://go-review.googlesource.com/c/go/+/193977
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-09-06 22:44:48 +00:00
Mihai Borobocea
8a8cf5bf6d text/template: refer to sorted map keys as "ordered" not "comparable" in docs
Consistent with the spec's definition of "ordered" and "comparable".

Fixes #34147

Change-Id: Id13186df5343588d80eaebfeb23092596a846d51
Reviewed-on: https://go-review.googlesource.com/c/go/+/193840
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
2019-09-06 21:22:26 +00:00
Matthew Dempsky
5e43856aa9 cmd/compile: rename Etype to ctxType
golang.org/cl/150140 renamed the other Efoo constants to ctxFoo, but
forgot about Etype.

gorename -from '"cmd/compile/internal/gc".Etype -to ctxType

Change-Id: I142dd42ca84a398f8d2316d75ead3331c023b820
Reviewed-on: https://go-review.googlesource.com/c/go/+/193958
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
2019-09-06 20:05:29 +00:00
K. "pestophagous" Heller
2da9c3e0f9 cmd/compile: improve errors for invalid conversions of consts
Follow-up to Change-Id: If6e52c59eab438599d641ecf6f110ebafca740a9

This addresses the remaining tech debt on issue 21979.

The aforementioned previous CL silenced one of two mostly redundant
compiler errors. However, the silenced error was the more expressive
error. This CL now imbues the surviving error with the same level
of expressiveness as the old semi-redundant error.

Fixes #21979

Change-Id: I3273d48c88bbab073fabe53421d801df621ce321
Reviewed-on: https://go-review.googlesource.com/c/go/+/191079
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-09-06 18:03:49 +00:00
Joel Sing
a3ceb57fb4 cmd/internal/sys: provide architecture definition for riscv64
Updates #27532

Change-Id: I7ecf5239d6bc49408a2f155d0f5398ee716fd443
Reviewed-on: https://go-review.googlesource.com/c/go/+/193678
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2019-09-06 17:49:50 +00:00
Yuval Pavel Zholkover
c78ac39ae9 cmd/link: use gold when dynamic linking on arm,arm64 only on Linux and Android
Fixes freebsd/arm build.

Change-Id: Id9b1905a5335f86d317dab7514e0ce7cb74aba1d
Reviewed-on: https://go-review.googlesource.com/c/go/+/193537
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2019-09-06 17:41:07 +00:00
Ian Lance Taylor
b4924870f4 misc/cgo/test: use __atomic intrinsics instead of __sync
GCC has supported the __atomic intrinsics since 4.7, and clang
supports them as well. They are better than the __sync intrinsics in
that they specify a memory model and, more importantly for our purposes,
they are reliably implemented either in the compiler or in libatomic.

Change-Id: I5e0036ea3300f65c28b1c3d1f3b93fb61c1cd646
Reviewed-on: https://go-review.googlesource.com/c/go/+/193603
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
2019-09-06 17:38:58 +00:00
Sjoerd Siebinga
e3d3e115e8 cmd/go: add a test for -sectcreate in LDFLAGS
It was already covered by a regex pattern, but it didn't have a test.

To fix the issue for good, added regression test.

Fixes #28832.

Change-Id: I861e3bed92d3b9484fd8671270dbd2e264b10d2d
Reviewed-on: https://go-review.googlesource.com/c/go/+/191311
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2019-09-06 17:34:02 +00:00
Cuong Manh Le
d535501a8e cmd/compile: remove tempname usages
CL 59610 merged tempname to tempAt, but some of comments and error
message still refer to tempname. So changing to tempAt instead.

Change-Id: I032f3bedc135d17124b0daaf22c97d0d5ada0a6f
Reviewed-on: https://go-review.googlesource.com/c/go/+/193817
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2019-09-06 16:59:11 +00:00
Than McIntosh
b1a20253fe cmd/link: memoize/cache whether plugin.Open symbol available
Perform a single lookup of "plugin.Open" at the point where we set the
loaded flag for the context, then cache whether the result is nil, so
that we can consult this cached value later on (instead of having to
look up the symbol each time). This helps speed up the DynLinkingGo()
context method, which is called from within some very hot loops in the
linker (when linking 'hyperkube' from kubernetes, reduces total calls
to "sym.(*Symbols).ROLookup" from 6.5M to 4.3M)

Change-Id: I92a2ea2b21d24f67aec0a7afeef4acc77c095adf
Reviewed-on: https://go-review.googlesource.com/c/go/+/193260
Reviewed-by: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2019-09-06 12:16:32 +00:00
Than McIntosh
c7dc5e92dd test: tweak test to avoid unpreemptible loop with gccgo
This test contains a very tight loop with locking/unlocking that can
wind up as an unpreemptible when compiled with gccgo, depending on
inlining. Tweak the test slightly to avoid this problem.

Change-Id: I155fd2b4bfea961244eb6c6594c24ab03d32d41c
Reviewed-on: https://go-review.googlesource.com/c/go/+/193619
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2019-09-06 12:15:16 +00:00
Than McIntosh
d4a6a2661c test: add test that failed with gccgo
Test with some code that triggered a compilation error bug in gccgo.

Updates #33866.

Change-Id: Ib2f226bbbebbfae33b41037438fe34dc5f2ad034
Reviewed-on: https://go-review.googlesource.com/c/go/+/193261
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2019-09-06 12:11:17 +00:00
Matthew Dempsky
9da99049ba cmd/compile: restore lineno before returning in defaultlitreuse
This affects the position information that's associated with the
implicit OCONV nodes created in assignconvfn.

Not super important and the followup rewrite CL fixes this too, but
fixing it separately is easy and makes toolstash-check happier.

Change-Id: Ifd65dc524b367812d14a4d996647a5d40665fb38
Reviewed-on: https://go-review.googlesource.com/c/go/+/193606
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-09-06 06:20:27 +00:00
Ian Lance Taylor
3aae49b8b4 cmd/dist: default to clang on OpenBSD
OpenBSD ships with GCC 4.2, the last version of GCC that used GPLv2.
As that is quite old (current GCC version is GCC 9, GCC 4.2 was
released in 2007), default to clang.

Change-Id: Ib93e7b4f4f3ffb9e047e60ffca3696d26ab08aac
Reviewed-on: https://go-review.googlesource.com/c/go/+/193621
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2019-09-06 04:54:12 +00:00
Cuong Manh Le
1406ece446 cmd/compile: preserve loop depth when evaluating block
Add block method to preserve loop depth when evaluating statements in a
block, so escape analysis can handle looping label more precisely.

Updates #22438

Change-Id: I39b306544a6c0ee3fcbebbe0d0ee735cb71773e6
Reviewed-on: https://go-review.googlesource.com/c/go/+/193517
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2019-09-06 01:35:46 +00:00
Ian Lance Taylor
c99598cbd3 errors: clarify docs for when As returns false
Change-Id: Ic8d8399f726c1f9376499fdae92bea41632586ff
Reviewed-on: https://go-review.googlesource.com/c/go/+/193602
Reviewed-by: Jonathan Amsterdam <jba@google.com>
2019-09-06 00:03:32 +00:00
psampaz
2b6b474f64 regexp: add example for ReplaceAll
Updates #21450

Change-Id: Ia31c20b52bae5daeb33d918234c2f0944a8aeb07
GitHub-Last-Rev: cc85544770
GitHub-Pull-Request: golang/go#33489
Reviewed-on: https://go-review.googlesource.com/c/go/+/189137
Run-TryBot: Sylvain Zimmer <sylvinus@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2019-09-05 23:52:39 +00:00
Richard Musiol
547021d723 cmd/internal/obj/wasm: refactor handling of wasm variables
This commit improves how registers get mapped to wasm variables. This
is a preparation for future improvements (e.g. adding 32 bit float
registers).

Change-Id: I374c80b2d6c9bcce6b0e373fe921b5ad4dee40ff
Reviewed-on: https://go-review.googlesource.com/c/go/+/191777
Run-TryBot: Richard Musiol <neelance@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2019-09-05 21:27:49 +00:00
Michael Knyszek
aae0b5b0b2 runtime: use hard heap goal if we've done more scan work than expected
This change makes it so that if we're already finding ourselves in a
situation where we've done more scan work than expected in the
steady-state (that is, 50% of heap_scan for GOGC=100), then we fall back
on the hard heap goal instead of continuing to assume the expected case.

In some cases its possible that we're already doing more scan work than
expected, and if GC assists come in just at that window where we notice
it, they might accumulate way too much assist credit, causing undue heap
growths if GOMAXPROCS=1 (since the fractional background worker isn't
guaranteed to fire). This case seems awfully specific, and that's
because it's exactly the case for TestGcSys, which has been flaky for
some time as a result.

Fixes #28574, #27636, and #27156.

Change-Id: I771f42bed34739dbb1b84ad82cfe247f70836031
Reviewed-on: https://go-review.googlesource.com/c/go/+/184097
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2019-09-04 21:52:18 +00:00
Bryan C. Mills
d21953df04 cmd/go/internal/test: prepend -test.timeout rather than appending
Tests may accept positional arguments, in which case the -test.timeout
flag must be passed before those arguments.

Fixes #34072

Change-Id: I5b92d7c0edc4f9e1efb63b0733937b76236c0eff
Reviewed-on: https://go-review.googlesource.com/c/go/+/193297
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2019-09-04 20:38:05 +00:00
Austin Clements
5ff38e4761 runtime: platform-independent faketime support
This adds a platform-independent implementation of nacl's faketime
support. It can be enabled by setting the faketime build tag.

Updates #30439.

Change-Id: Iee097004d56d796e6d2bfdd303a092c067ade87e
Reviewed-on: https://go-review.googlesource.com/c/go/+/192740
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2019-09-04 17:56:53 +00:00
Austin Clements
0607cdda6b syscall: redirect writes to runtime.write in faketime mode
If the faketime build tag is set, this causes syscall.Write for FDs 1
and 2 to redirect to runtime.write, since that's where we'll apply the
faketime framing. This is equivalent to what nacl currently does in
naclFile.write.

We do this on all of the platforms except nacl, which has its own
faketime support and we're about to remove, and Windows, which would
require other changes to support faketime so we're leaving alone for
now.

Updates #30439.

Change-Id: I138a5ca63577d92d15b5437d037bd3159fa84ee7
Reviewed-on: https://go-review.googlesource.com/c/go/+/192739
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2019-09-04 17:56:17 +00:00
Austin Clements
4af3c17f8c runtime: wrap nanotime, walltime, and write
In preparation for general faketime support, this renames the existing
nanotime, walltime, and write functions to nanotime1, walltime1, and
write1 and wraps them with trivial Go functions. This will let us
inject different implementations on all platforms when faketime is
enabled.

Updates #30439.

Change-Id: Ice5ccc513a32a6d89ea051638676d3ee05b00418
Reviewed-on: https://go-review.googlesource.com/c/go/+/192738
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2019-09-04 17:56:09 +00:00
Bryan C. Mills
6719d889e1 cmd/go/internal/get: avoid panic in metaImportsForPrefix if web.Get fails
Fixes #34049

Change-Id: I817b83ee2d0ca6d01ec64998f14bc4f32e365d66
Reviewed-on: https://go-review.googlesource.com/c/go/+/193259
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2019-09-04 17:09:25 +00:00
Jonathan Amsterdam
d9a3d902ec errors: fix wrong code in package doc
You can't call Unwrap on the return value of fmt.Errorf, but
you can pass the result to errors.Unwrap.

Also, move the description of the Unwrap function up so the
example makes sense.

Fixes #34061.

Change-Id: Ica07c44665c5e65deea4aa6a146fc543a5a0a99d
Reviewed-on: https://go-review.googlesource.com/c/go/+/193298
Run-TryBot: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Katie Hockman <katie@golang.org>
2019-09-04 17:08:55 +00:00
Robert Griesemer
6fcc2d85be spec: clarify that shift count must be non-negative
Fixes #34056.

Change-Id: I2c9b7a20d19f458df5dcc376e29bee6be1f09f7a
Reviewed-on: https://go-review.googlesource.com/c/go/+/193277
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2019-09-04 16:01:24 +00:00
Michael Anthony Knyszek
7b294cdd8d runtime: don't hold worldsema across mark phase
This change makes it so that worldsema isn't held across the mark phase.
This means that various operations like ReadMemStats may now stop the
world during the mark phase, reducing latency on such operations.

Only three such operations are still no longer allowed to occur during
marking: GOMAXPROCS, StartTrace, and StopTrace.

For the former it's because any change to GOMAXPROCS impacts GC mark
background worker scheduling and the details there are tricky.

For the latter two it's because tracing needs to observe consistent GC
start and GC end events, and if StartTrace or StopTrace may stop the
world during marking, then it's possible for it to see a GC end event
without a start or GC start event without an end, respectively.

To ensure that GOMAXPROCS and StartTrace/StopTrace cannot proceed until
marking is complete, the runtime now holds a new semaphore, gcsema,
across the mark phase just like it used to with worldsema.

Fixes #19812.

Change-Id: I15d43ed184f711b3d104e8f267fb86e335f86bf9
Reviewed-on: https://go-review.googlesource.com/c/go/+/182657
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2019-09-04 15:53:59 +00:00
Tobias Klauser
033299fab6 all: add a space before +build in build tag comments
Add a space before build tag comments so it corresponds to the format
documented at https://golang.org/pkg/go/build/.

Change-Id: I8349d0343597e304b97fb5479847231ed8945b1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/193237
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2019-09-04 15:10:03 +00:00
Filippo Valsorda
1452119867 crypto/x509: remove IsCA exception for broken Entrust root
The exception allowed a specific intermediate [1] to chain up to a
broken root that lacked the CA:TRUE X509v3 Basic Constraint.

The broken root [2] is expiring at the end of 2019, so we can remove the
exception in Go 1.14.

Moreover, there is a reissued version of that root [3] (same Subject and
SPKI, valid CA) which expires in 2029, so root stores should have
migrated to it already, making the exception unnecessary.

[1]: https://crt.sh/?caid=57
[2]: https://crt.sh/?id=1616049
[3]: https://crt.sh/?id=55

Change-Id: I43f51100982791b0e8bac90d143b60851cd46dfc
Reviewed-on: https://go-review.googlesource.com/c/go/+/193038
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2019-09-03 21:10:31 +00:00
Keith Randall
36f30ba289 cmd/compile,runtime: generate hash functions only for types which are map keys
Right now we generate hash functions for all types, just in case they
are used as map keys. That's a lot of wasted effort and binary size
for types which will never be used as a map key. Instead, generate
hash functions only for types that we know are map keys.

Just doing that is a bit too simple, since maps with an interface type
as a key might have to hash any concrete key type that implements that
interface. So for that case, implement hashing of such types at
runtime (instead of with generated code). It will be slower, but only
for maps with interface types as keys, and maybe only a bit slower as
the aeshash time probably dominates the dispatch time.

Reorg where we keep the equals and hash functions. Move the hash function
from the key type to the map type, saving a field in every non-map type.
That leaves only one function in the alg structure, so get rid of that and
just keep the equal function in the type descriptor itself.

cmd/go now has 10 generated hash functions, instead of 504. Makes
cmd/go 1.0% smaller. Update #6853.

Speed on non-interface keys is unchanged. Speed on interface keys
is ~20% slower:

name                  old time/op  new time/op  delta
MapInterfaceString-8  23.0ns ±21%  27.6ns ±14%  +20.01%  (p=0.002 n=10+10)
MapInterfacePtr-8     19.4ns ±16%  23.7ns ± 7%  +22.48%   (p=0.000 n=10+8)

Change-Id: I7c2e42292a46b5d4e288aaec4029bdbb01089263
Reviewed-on: https://go-review.googlesource.com/c/go/+/191198
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
2019-09-03 20:41:29 +00:00
Andrew
671bcb5966 doc: add Go 1.13 to release history
Change-Id: I3340561c0b17bf28d8d480e00f5bc8afb2a897ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/193041
Run-TryBot: Andrew Bonventre <andybons@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
2019-09-03 20:02:22 +00:00
Ian Lance Taylor
aee084b3ca cmd/compile/internal/gc: use GoToolPath in TestDeps
Updates #31563
Fixes #34041

Change-Id: Ib9fdcd2f83d867fd31b42eab3a813f5cef88860e
Reviewed-on: https://go-review.googlesource.com/c/go/+/193077
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2019-09-03 19:54:33 +00:00
Keith Randall
7c90e2cbda bytes/hash: disable seed test on 32-bit platforms
The distribution of hash outputs when varying the seed is
not good enough on 32-bit platforms.

This isn't a likely attack vector (the adversary controlling the seed),
so it isn't a huge deal. Would be nice to fix, though. For now, just
skip this test.

Fixes #33988

Change-Id: Icf51ab687fc215422a5492ae78e6f414b33e04cb
Reviewed-on: https://go-review.googlesource.com/c/go/+/193078
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2019-09-03 19:37:16 +00:00
Cuong Manh Le
d2f958d8d1 cmd/compile: extend ssa.go to handle 1-element array and 1-field struct
Assinging to 1-element array/1-field struct variable is considered clobbering
the whole variable. By emitting OpVarDef in this case, liveness analysis
can now know the variable is redefined.

Also, the isfat is not necessary anymore, and will be removed in follow up CL.

Fixes #33916

Change-Id: Iece0d90b05273f333d59d6ee5b12ee7dc71908c2
Reviewed-on: https://go-review.googlesource.com/c/go/+/192979
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2019-09-03 19:33:04 +00:00
Than McIntosh
9da7abd2eb debug/dwarf: better handling for DW_FORM_indirect
Fix a buglet in abbrev processing related to DW_FORM_indirect. When
reading an abbrev entry if we encounter an attribute with form
DW_FORM_indirect, leave the class as ClassUnknown, then when the
abbrev is walked during the reading of the DIE fill in the class based
on the value read at that point (code for handling DW_FORM_indirect
seems to be already partially in place in the DIE reader).

Updates #33488.

Change-Id: I9dc89abf5cc8d7ea96824c0011bef979de0540bf
Reviewed-on: https://go-review.googlesource.com/c/go/+/190158
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
2019-09-03 18:35:32 +00:00
Matthew Dempsky
9f89edcd96 cmd/compile: silence esc diagnostics about directiface OCONVIFACEs
In general, a conversion to interface type may require values to be
boxed, which in turn necessitates escape analysis to determine whether
the boxed representation can be stack allocated.

However, esc.go used to unconditionally print escape analysis
decisions about OCONVIFACE, even for conversions that don't require
boxing (e.g., pointers, channels, maps, functions).

For test compatibility with esc.go, escape.go similarly printed these
useless diagnostics. This CL removes the diagnostics, and updates test
expectations accordingly.

Change-Id: I97c57a4a08e44d265bba516c78426ff4f2bf1e12
Reviewed-on: https://go-review.googlesource.com/c/go/+/192697
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2019-09-03 17:52:06 +00:00
Matthew Dempsky
a71967e4c5 cmd/compile: replace copytype to setUnderlying
While here, change the params to be easier to understand: "t" is now
always the type being updated, and "underlying" is now used to
represent the underlying type.

Updates #33658.

Change-Id: Iabb64414ca3abaa8c780e4c9093e0c77b76fabf9
Reviewed-on: https://go-review.googlesource.com/c/go/+/192724
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-09-03 17:50:54 +00:00
Matthew Dempsky
380ef6b759 cmd/compile: simplify {defer,resume}checkwidth logic
This CL extends {defer,resume}checkwidth to support nesting, which
simplifies usage.

Updates #33658.

Change-Id: Ib3ffb8a7cabfae2cbeba74e21748c228436f4726
Reviewed-on: https://go-review.googlesource.com/c/go/+/192721
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
2019-09-03 17:38:32 +00:00