1
0
mirror of https://github.com/golang/go synced 2024-11-23 17:30:02 -07:00
Commit Graph

36091 Commits

Author SHA1 Message Date
Filippo Valsorda
bd18c09095 crypto/tls: parse certificate first in X509KeyPair to get better errors
parsePrivateKey can't return useful error messages because it does trial
decoding of multiple formats.  Try ParseCertificate first in case it
offers a useful error message.

Fixes #23591

Change-Id: I380490a5850bee593a7d2f584a27b2a14153d768
Reviewed-on: https://go-review.googlesource.com/90435
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Adam Langley <agl@golang.org>
2018-03-27 21:47:54 +00:00
Filippo Valsorda
a25d0d8fb9 crypto/x509: cache the result of SystemCertPool
Fixes #24540

Change-Id: I65e9f2f99403e22d25ea64cc26701bf62a31d070
Reviewed-on: https://go-review.googlesource.com/102699
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Adam Langley <agl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-03-27 21:46:51 +00:00
Ian Lance Taylor
ad0ebc3994 cmd/go: with -x, don't report removing a non-existent objdir
Fixes #24389
Fixes #24396

Change-Id: I37399528700e2a39d9523d7c41bdc929618eb095
Reviewed-on: https://go-review.googlesource.com/102619
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-27 19:55:14 +00:00
erifan01
711a373cc3 math: optimize Exp and Exp2 on arm64
This CL implements Exp and Exp2 with arm64 assembly. By inlining Ldexp and
using fused instructions(fmadd, fmsub, fnmsub), this CL helps to improve
the performance of functions Exp, Exp2, Sinh, Cosh and Tanh.

Benchmarks:
name                   old time/op  new time/op  delta
Cosh-8                  138ns ± 0%    96ns ± 0%  -30.72%  (p=0.008 n=5+5)
Exp-8                   105ns ± 0%    58ns ± 0%  -45.24%  (p=0.000 n=5+4)
Exp2-8                  100ns ± 0%    57ns ± 0%  -43.21%  (p=0.008 n=5+5)
Sinh-8                  139ns ± 0%   102ns ± 0%  -26.62%  (p=0.008 n=5+5)
Tanh-8                  134ns ± 0%   100ns ± 0%  -25.67%  (p=0.008 n=5+5)

Change-Id: I7483a3333062a1d3525cedf3de56db78d79031c6
Reviewed-on: https://go-review.googlesource.com/86615
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2018-03-27 19:55:02 +00:00
Yuval Pavel Zholkover
0a5be12f5c cmd/internal/obj/arm: add DMB instruction
Change-Id: Ib67a61d5b37af210ff15d60d72bd5238b9c2d0ca
Reviewed-on: https://go-review.googlesource.com/94815
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2018-03-27 19:54:44 +00:00
Ben Shi
fc7a72596b cmd/internal/obj/arm64: add LDPW/LDPSW/STPW to arm64 assembler
1. STPW stores the lower 32-bit words of a pair of registers to memory.
2. LDPW loads two 32-bit words from memory, zero extends them to 64-bit,
and then copies to a pair of registers.
3. LDPSW does the same as LDPW, except a sign extension.

This CL implements those 3 instructions and adds test cases.

Change-Id: Ied9834d8240240d23ce00e086b4ea456e1611f1a
Reviewed-on: https://go-review.googlesource.com/99956
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2018-03-27 19:13:17 +00:00
Hana Kim
aaeaad6870 cmd/trace: assign a unique span id for slice representation
Spans are represented using Async Event types of chrome trace viewer.
According to the doc, the 'id' should be unique within category, scope.

https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview#heading=h.jh64i9l3vwa1

Use the index in the task's span slice as the slice id, so it
can be unique within the task. The scope is the task id which
is unique.

This fixes a visualization bug that caused incorrect or missing
presentation of nested spans.

Change-Id: If1537ee00247f71fa967abfe45569a9e7dbcdce7
Reviewed-on: https://go-review.googlesource.com/102697
Reviewed-by: Heschi Kreinick <heschi@google.com>
2018-03-27 19:03:54 +00:00
Michael Munday
331c187b17 cmd/compile: simplify Neg lowering on s390x
No need to sign extend input to Neg8 and Neg16.

Change-Id: I7896c83c9cdf84a34098582351a4aabf61cd6fdd
Reviewed-on: https://go-review.googlesource.com/102675
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-27 19:03:42 +00:00
Matthew Dempsky
7b177b1a03 cmd/compile: fix method set computation for shadowed methods
In expandmeth, we call expand1/expand0 to build a list of all
candidate methods to promote, and then we use dotpath to prune down
which names actually resolve to a promoted method and how.

However, previously we still computed "followsptr" based on the
expand1/expand0 traversal (which is depth-first), rather than
dotpath (which is breadth-first). The result is that we could
sometimes end up miscomputing whether a particular promoted method
involves a pointer traversal, which could result in bad code
generation for method trampolines.

Fixes #24547.

Change-Id: I57dc014466d81c165b05d78b98610dc3765b7a90
Reviewed-on: https://go-review.googlesource.com/102618
Reviewed-by: Robert Griesemer <gri@golang.org>
2018-03-27 18:56:36 +00:00
Daniel Theophanes
6e59c73a9f database/sql: check to see if ctx is cancelable before await
Prevent queries from starting a goroutine if the context is
not able to be canceled.

Fixes #23879

Change-Id: I392047bd53d7f796219dd12ee11b07303658fdaf
Reviewed-on: https://go-review.googlesource.com/102478
Run-TryBot: Daniel Theophanes <kardianos@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Yasuhiro MATSUMOTO <mattn.jp@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-27 18:40:46 +00:00
Alberto Donizetti
377a2cb2d2 cmd/compile: reduce allocations in regAllocState.regalloc
name      old time/op       new time/op       delta
Template        281ms ± 2%        282ms ± 3%    ~     (p=0.428 n=19+20)
Unicode         138ms ± 6%        138ms ± 7%    ~     (p=0.813 n=19+20)
GoTypes         901ms ± 2%        895ms ± 2%    ~     (p=0.050 n=19+20)
Compiler        4.25s ± 1%        4.23s ± 1%  -0.31%  (p=0.031 n=19+18)
SSA             9.77s ± 1%        9.78s ± 1%    ~     (p=0.512 n=20+20)
Flate           187ms ± 3%        187ms ± 4%    ~     (p=0.687 n=20+19)
GoParser        224ms ± 4%        222ms ± 3%    ~     (p=0.301 n=20+20)
Reflect         576ms ± 2%        576ms ± 2%    ~     (p=0.620 n=20+20)
Tar             262ms ± 3%        263ms ± 3%    ~     (p=0.599 n=19+18)
XML             322ms ± 4%        322ms ± 2%    ~     (p=0.512 n=20+20)

name      old user-time/op  new user-time/op  delta
Template        403ms ± 3%        399ms ± 5%    ~     (p=0.149 n=17+20)
Unicode         217ms ±12%        217ms ± 9%    ~     (p=0.883 n=20+20)
GoTypes         1.24s ± 3%        1.24s ± 3%    ~     (p=0.718 n=20+20)
Compiler        5.90s ± 3%        5.84s ± 5%    ~     (p=0.217 n=18+20)
SSA             14.0s ± 6%        14.1s ± 5%    ~     (p=0.235 n=19+20)
Flate           253ms ± 6%        254ms ± 5%    ~     (p=0.749 n=20+19)
GoParser        309ms ± 7%        307ms ± 5%    ~     (p=0.398 n=20+20)
Reflect         772ms ± 3%        771ms ± 3%    ~     (p=0.901 n=20+19)
Tar             368ms ± 5%        369ms ± 8%    ~     (p=0.429 n=20+20)
XML             435ms ± 5%        434ms ± 5%    ~     (p=0.841 n=20+20)

name      old alloc/op      new alloc/op      delta
Template       39.0MB ± 0%       38.9MB ± 0%  -0.21%  (p=0.000 n=20+19)
Unicode        29.0MB ± 0%       29.0MB ± 0%  -0.03%  (p=0.000 n=20+20)
GoTypes         116MB ± 0%        115MB ± 0%  -0.33%  (p=0.000 n=20+20)
Compiler        498MB ± 0%        496MB ± 0%  -0.37%  (p=0.000 n=19+20)
SSA            1.41GB ± 0%       1.40GB ± 0%  -0.24%  (p=0.000 n=20+20)
Flate          25.0MB ± 0%       25.0MB ± 0%  -0.22%  (p=0.000 n=20+19)
GoParser       31.0MB ± 0%       30.9MB ± 0%  -0.23%  (p=0.000 n=20+17)
Reflect        77.1MB ± 0%       77.0MB ± 0%  -0.12%  (p=0.000 n=20+20)
Tar            39.7MB ± 0%       39.6MB ± 0%  -0.17%  (p=0.000 n=20+20)
XML            44.9MB ± 0%       44.8MB ± 0%  -0.29%  (p=0.000 n=20+20)

name      old allocs/op     new allocs/op     delta
Template         386k ± 0%         385k ± 0%  -0.28%  (p=0.000 n=20+20)
Unicode          337k ± 0%         336k ± 0%  -0.07%  (p=0.000 n=20+20)
GoTypes         1.20M ± 0%        1.20M ± 0%  -0.41%  (p=0.000 n=20+20)
Compiler        4.71M ± 0%        4.68M ± 0%  -0.52%  (p=0.000 n=20+20)
SSA             11.7M ± 0%        11.6M ± 0%  -0.31%  (p=0.000 n=20+19)
Flate            238k ± 0%         237k ± 0%  -0.28%  (p=0.000 n=18+20)
GoParser         320k ± 0%         319k ± 0%  -0.34%  (p=0.000 n=20+19)
Reflect          961k ± 0%         959k ± 0%  -0.12%  (p=0.000 n=20+20)
Tar              397k ± 0%         396k ± 0%  -0.23%  (p=0.000 n=20+20)
XML              419k ± 0%         417k ± 0%  -0.39%  (p=0.000 n=20+19)

Change-Id: Ic7ec3614808d9892c1cab3991b996b7a3b8eff21
Reviewed-on: https://go-review.googlesource.com/102676
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2018-03-27 18:03:39 +00:00
Tobias Klauser
4ff4e50725 runtime: parse auxv for page size on netbsd
Decode AT_PAGESZ to determine physPageSize on netbsd.

Also rename vdso_none.go to auxv_none.go which matches its purpose more
closely.

Akin to CL 99780 which did the same for freebsd.

Change-Id: Iea4322f861ff0f3515e9051585dbb442f024326b
Reviewed-on: https://go-review.googlesource.com/102677
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-03-27 15:21:51 +00:00
Carlos Eduardo Seo
a44c72823c math/big: improve performance of addVW/subVW for ppc64x
This change adds a better implementation in asm for addVW/subVW for
ppc64x, with speedups up to 3.11x.

benchmark                    old ns/op     new ns/op     delta
BenchmarkAddVW/1-16          6.87          5.71          -16.89%
BenchmarkAddVW/2-16          7.72          5.94          -23.06%
BenchmarkAddVW/3-16          8.74          6.56          -24.94%
BenchmarkAddVW/4-16          9.66          7.26          -24.84%
BenchmarkAddVW/5-16          10.8          7.26          -32.78%
BenchmarkAddVW/10-16         17.4          9.97          -42.70%
BenchmarkAddVW/100-16        164           56.0          -65.85%
BenchmarkAddVW/1000-16       1638          524           -68.01%
BenchmarkAddVW/10000-16      16421         5201          -68.33%
BenchmarkAddVW/100000-16     165762        53324         -67.83%
BenchmarkSubVW/1-16          6.76          5.62          -16.86%
BenchmarkSubVW/2-16          7.69          6.02          -21.72%
BenchmarkSubVW/3-16          8.85          6.61          -25.31%
BenchmarkSubVW/4-16          10.0          7.34          -26.60%
BenchmarkSubVW/5-16          11.3          7.33          -35.13%
BenchmarkSubVW/10-16         19.5          18.7          -4.10%
BenchmarkSubVW/100-16        153           55.9          -63.46%
BenchmarkSubVW/1000-16       1502          519           -65.45%
BenchmarkSubVW/10000-16      15005         5165          -65.58%
BenchmarkSubVW/100000-16     150620        53124         -64.73%

benchmark                    old MB/s     new MB/s     speedup
BenchmarkAddVW/1-16          1165.12      1400.76      1.20x
BenchmarkAddVW/2-16          2071.39      2693.25      1.30x
BenchmarkAddVW/3-16          2744.72      3656.92      1.33x
BenchmarkAddVW/4-16          3311.63      4407.34      1.33x
BenchmarkAddVW/5-16          3700.52      5512.48      1.49x
BenchmarkAddVW/10-16         4605.63      8026.37      1.74x
BenchmarkAddVW/100-16        4856.15      14296.76     2.94x
BenchmarkAddVW/1000-16       4883.96      15264.21     3.13x
BenchmarkAddVW/10000-16      4871.52      15380.78     3.16x
BenchmarkAddVW/100000-16     4826.17      15002.48     3.11x
BenchmarkSubVW/1-16          1183.20      1423.03      1.20x
BenchmarkSubVW/2-16          2081.92      2657.44      1.28x
BenchmarkSubVW/3-16          2711.52      3632.30      1.34x
BenchmarkSubVW/4-16          3198.30      4360.30      1.36x
BenchmarkSubVW/5-16          3534.43      5460.40      1.54x
BenchmarkSubVW/10-16         4106.34      4273.51      1.04x
BenchmarkSubVW/100-16        5213.48      14306.32     2.74x
BenchmarkSubVW/1000-16       5324.27      15391.21     2.89x
BenchmarkSubVW/10000-16      5331.33      15486.57     2.90x
BenchmarkSubVW/100000-16     5311.35      15059.01     2.84x

Change-Id: Ibaa5b9b38d63fba8e01a9c327eb8bef1e6e908c1
Reviewed-on: https://go-review.googlesource.com/101975
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
2018-03-27 15:06:53 +00:00
HaraldNordgren
a42ea51ae9 cmd/go: print each import error only once
This change prevents import errors from being printed multiple times.
Creating a bare-bones package 'p' with only one file importing itself
and running 'go build p', the current implementation gives this error
message:

	can't load package: import cycle not allowed
	package p
		imports p
	import cycle not allowed
	package p
		imports p

With this change we will show the message only once.

Updates #23295

Change-Id: I653b34c1c06c279f3df514f12ec0b89745a7e64a
Reviewed-on: https://go-review.googlesource.com/86535
Reviewed-by: Harald Nordgren <haraldnordgren@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>
2018-03-27 14:07:14 +00:00
Meng Zhuo
ea59ebd338 runtime: use vDSO for clock_gettime on linux/arm64
Use the __vdso_clock_gettime fast path via the vDSO on linux/arm64 to
speed up nanotime and walltime. This results in the following
performance improvement for time.Now on Cavium ThunderX:

name     old time/op  new time/op  delta
TimeNow   442ns ± 0%   163ns ± 0%  -63.16%  (p=0.000 n=10+10)

And benchmarks on VDSO

BenchmarkClockVDSOAndFallbackPaths/vDSO         10000000 166 ns/op
BenchmarkClockVDSOAndFallbackPaths/Fallback     3000000 456 ns/op

Change-Id: I326118c6dff865eaa0569fc45d1fc1ff95cb74f6
Reviewed-on: https://go-review.googlesource.com/99855
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-03-27 13:21:27 +00:00
Alberto Donizetti
b63b0f2b75 cmd/compile: allocate less in regalloc's liveValues
Instrumenting the compiler shows that, at the end of liveValues, the
values of the workList's cap are distributed as:

  cap	 freq
  1  	 0.006
  2  	 0.002
  4  	 0.237
  8  	 0.272
  16	 0.254
  32	 0.141
  64	 0.062
  128	 0.02
  256	 0.005
  512	 0.001
  1024	 0.0

Since the initial workList slice allocation is always on the stack
(as the variable does not escape), we can aggressively pre-allocate a
big backing array at (almost) no cost. This will save several
allocations in liveValues calls that end up having a large workList,
with no performance penalties for calls that have a small workList.

name      old time/op       new time/op       delta
Template        284ms ± 3%        282ms ± 3%    ~     (p=0.201 n=20+20)
Unicode         138ms ± 7%        138ms ± 7%    ~     (p=0.718 n=20+20)
GoTypes         905ms ± 2%        895ms ± 1%  -1.10%  (p=0.003 n=19+18)
Compiler        4.26s ± 1%        4.25s ± 1%  -0.38%  (p=0.038 n=20+19)
SSA             9.85s ± 2%        9.80s ± 1%    ~     (p=0.061 n=20+19)
Flate           187ms ± 6%        186ms ± 5%    ~     (p=0.289 n=20+20)
GoParser        227ms ± 3%        225ms ± 3%    ~     (p=0.072 n=20+20)
Reflect         578ms ± 2%        575ms ± 2%    ~     (p=0.059 n=18+20)
Tar             263ms ± 2%        265ms ± 3%    ~     (p=0.224 n=19+20)
XML             323ms ± 3%        325ms ± 2%    ~     (p=0.127 n=20+20)

name      old user-time/op  new user-time/op  delta
Template        406ms ± 6%        404ms ± 4%    ~     (p=0.314 n=20+20)
Unicode         220ms ± 6%        215ms ±11%    ~     (p=0.077 n=18+20)
GoTypes         1.25s ± 3%        1.24s ± 4%    ~     (p=0.461 n=20+20)
Compiler        5.95s ± 2%        5.84s ± 5%  -1.93%  (p=0.007 n=20+20)
SSA             14.4s ± 4%        14.2s ± 4%    ~     (p=0.108 n=20+20)
Flate           257ms ± 6%        252ms ± 9%    ~     (p=0.063 n=20+20)
GoParser        317ms ± 5%        312ms ± 6%  -1.85%  (p=0.049 n=20+20)
Reflect         779ms ± 2%        774ms ± 3%    ~     (p=0.253 n=20+20)
Tar             371ms ± 4%        374ms ± 4%    ~     (p=0.327 n=20+20)
XML             440ms ± 5%        442ms ± 5%    ~     (p=0.678 n=20+20)

name      old alloc/op      new alloc/op      delta
Template       39.4MB ± 0%       39.0MB ± 0%  -0.96%  (p=0.000 n=20+20)
Unicode        29.1MB ± 0%       29.0MB ± 0%  -0.13%  (p=0.000 n=20+20)
GoTypes         117MB ± 0%        116MB ± 0%  -0.88%  (p=0.000 n=20+20)
Compiler        502MB ± 0%        498MB ± 0%  -0.77%  (p=0.000 n=19+20)
SSA            1.42GB ± 0%       1.40GB ± 0%  -0.80%  (p=0.000 n=20+20)
Flate          25.3MB ± 0%       25.0MB ± 0%  -1.10%  (p=0.000 n=20+19)
GoParser       31.3MB ± 0%       31.0MB ± 0%  -1.05%  (p=0.000 n=20+20)
Reflect        77.9MB ± 0%       77.1MB ± 0%  -1.03%  (p=0.000 n=20+20)
Tar            40.0MB ± 0%       39.7MB ± 0%  -0.80%  (p=0.000 n=20+20)
XML            45.2MB ± 0%       44.9MB ± 0%  -0.72%  (p=0.000 n=20+20)

name      old allocs/op     new allocs/op     delta
Template         392k ± 0%         386k ± 0%  -1.44%  (p=0.000 n=20+20)
Unicode          337k ± 0%         337k ± 0%  -0.22%  (p=0.000 n=20+20)
GoTypes         1.22M ± 0%        1.20M ± 0%  -1.33%  (p=0.000 n=20+20)
Compiler        4.76M ± 0%        4.71M ± 0%  -1.12%  (p=0.000 n=20+20)
SSA             11.8M ± 0%        11.7M ± 0%  -1.00%  (p=0.000 n=20+20)
Flate            241k ± 0%         238k ± 0%  -1.49%  (p=0.000 n=20+20)
GoParser         324k ± 0%         320k ± 0%  -1.17%  (p=0.000 n=20+20)
Reflect          981k ± 0%         961k ± 0%  -2.11%  (p=0.000 n=20+20)
Tar              402k ± 0%         397k ± 0%  -1.29%  (p=0.000 n=20+20)
XML              424k ± 0%         419k ± 0%  -1.10%  (p=0.000 n=19+20)

Change-Id: If46667ae98eee2d47a615cad05e18df0629d8388
Reviewed-on: https://go-review.googlesource.com/102495
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2018-03-27 08:16:50 +00:00
Alberto Donizetti
fdee46ee70 cmd/compile: use more ORs in generic.rules
No changes in the actual generated compiler code.

Change-Id: I206a7bf7b60f70a73640119fc92974f79ed95a6b
Reviewed-on: https://go-review.googlesource.com/102416
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
2018-03-27 07:49:49 +00:00
David du Colombier
49325dc1d2 os: fix TestDevNullFile on Plan 9
CL 102457 added TestDevNullFile. However, this
test is failing on Plan 9, because it checks
that /dev/null is a character device while there
are no special files on Plan 9.

We fix this issue by changing Stat to consider
all files served by the console device (#c)
as character devices.

Fixes #24534.

Change-Id: I1c60cdf25770358b908790b3fb71910fa914dec0
Reviewed-on: https://go-review.googlesource.com/102424
Run-TryBot: David du Colombier <0intro@gmail.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-03-27 05:30:50 +00:00
Tim Wright
131901e80d cmd/go, cmd/link, runtime: enable PIE build mode, cgo race tests on FreeBSD
Fixes #24546

Change-Id: I99ebd5bc18e5c5e42eee4689644a7a8b02405f31
Reviewed-on: https://go-review.googlesource.com/102616
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-03-27 02:50:29 +00:00
Andrew Bonventre
165ebe6558 database/sql: fix docs to correctly refer to time.RFC3339Nano
It mentions time.Format3339Nano, which isn’t defined. The
underlying code uses time.RFC3339Nano.

Updates golang/go#24542

Change-Id: Ia34ae8b66427139d9005f902c2eb60aac4bfa8c6
Reviewed-on: https://go-review.googlesource.com/102607
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-26 23:12:45 +00:00
Brad Fitzpatrick
48db2c01b4 all: use strings.Builder instead of bytes.Buffer where appropriate
I grepped for "bytes.Buffer" and "buf.String" and mostly ignored test
files. I skipped a few on purpose and probably missed a few others,
but otherwise I think this should be most of them.

Updates #18990

Change-Id: I5a6ae4296b87b416d8da02d7bfaf981d8cc14774
Reviewed-on: https://go-review.googlesource.com/102479
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-03-26 23:05:53 +00:00
Hana Kim
f0eca373be cmd/trace: add /userspans, /userspan pages
Change-Id: Ifbefb659a8df3b079d69679871af444b179deaeb
Reviewed-on: https://go-review.googlesource.com/102599
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2018-03-26 22:30:52 +00:00
Adam Langley
dc3a92edaa crypto/x509: matching any requested EKU should be sufficient.
The documentation was unclear here and I misremembered the behaviour and
changed it in 1.10: it used to be that matching any EKU was enough but
1.10 requires that all EKUs match.

Restore 1.9 behaviour and clarify the documentation to make it official.

Fixes #24162.

Change-Id: Ic9466cd0799cb27ec3a3a7e6c96f10c2aacc7020
Reviewed-on: https://go-review.googlesource.com/97720
Run-TryBot: Adam Langley <agl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
2018-03-26 19:42:08 +00:00
Austin Clements
2d8181e7b5 cmd/compile: clarify unsigned interpretation of AuxInt
The way Value.AuxInt represents unsigned numbers is currently
documented in genericOps.go, which is not the most obvious place for
it. Move that documentation to Value.AuxInt. Furthermore, to make it
harder to use incorrectly, introduce a Value.AuxUnsigned accessor that
returns the zero-extended value of Value.AuxInt.

Change-Id: I85030c3c68761404058a430e0b1c7464591b2f42
Reviewed-on: https://go-review.googlesource.com/102597
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2018-03-26 19:08:24 +00:00
Tobias Klauser
a29e25b82c cmd/cgo: add support for GOARCH=sparc64
Even though GOARCH=sparc64 is not supported by gc (yet), it is easy to
make cgo already support it.

This e.g. allows to generate Go type definitions for linux/sparc64 in
the golang.org/x/sys/unix package without using gccgo.

Change-Id: I8886c81e7c895a0d93e350d81ed653fb59d95dd8
Reviewed-on: https://go-review.googlesource.com/102555
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-26 18:58:51 +00:00
David Chase
a934e34e87 cmd/compile: invoke gdb more carefully in ssa/debug_test.go
Gdb can be sensitive to contents of .gdbinit, and to run
this test properly needs to have runtime/runtime-gdb.py
on the auto load safe path.  Therefore, turn off .gdbinit
loading and explicitly add $GOROOT/runtime to the safe
load path.

This should make ssa/debug_test.go run more consistently.

Updates #24464.

Change-Id: I63ed17c032cb3773048713ce51fca3a3f86e79b6
Reviewed-on: https://go-review.googlesource.com/102598
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-03-26 18:44:52 +00:00
Ilya Tocar
3db3826a57 cmd/internal/obj/x86: use PutOpBytesLit in more places
We already replaced most loops with PutOpBytesLit where possible,
do this in a last few places.

Change-Id: I8c90de017810145a12394fa6b887755e9111b22a
Reviewed-on: https://go-review.googlesource.com/102276
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2018-03-26 18:20:18 +00:00
David Chase
f7404974da cmd/compile: finish GOEXPERIMENT=preemptibleloops repair
A newish check for branch-likely on single-successor blocks
caught a case where the preemption-check inserter was
setting "likely" on an unconditional branch.

Fixed by checking for that case before setting likely.

Also removed an overconservative restriction on parallel
compilation for GOEXPERIMENT=preemptibleloops; it works
fine, it is just another control-flow transformation.

Change-Id: I8e786e6281e0631cac8d80cff67bfb6402b4d225
Reviewed-on: https://go-review.googlesource.com/102317
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2018-03-26 17:44:14 +00:00
Michael Munday
8afa8a3374 cmd/compile: use 32-bit comparisons where possible on s390x
We use 32-bit operations for 8- and 16-bit arithmetic, so use them
for comparisons too. This won't change performance but it is more
consistent and makes testing 8- and 16-bit comparison codegen
slightly more straightforward (for follow up CL).

Also fix a typo and add some additional double sign and zero
extension rules to remove the operations inserted by the comparison
rules.

Change-Id: I89ec1b0e09cb8be8090cf007be283ad88bba75a4
Reviewed-on: https://go-review.googlesource.com/102556
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-26 17:41:34 +00:00
Zhou Peng
3412baaa02 runtime: fix comment typo
This was a typo mistake according to if cond and runtime/mheap.go:323

Change-Id: Id046d4afbfe0ea43cb29e1a9f400e1f130de221d
Reviewed-on: https://go-review.googlesource.com/102575
Reviewed-by: Austin Clements <austin@google.com>
2018-03-26 17:40:46 +00:00
Erwin Oegema
683e2fd578 path/filepath: change example to print the correct path on failure
This change makes errors in the example code a bit better, as it's no use to show the root dir when an error occurs walking a subdirectory or file.

Change-Id: I546276e9b151fabba5357258f03bfbd47a508201
GitHub-Last-Rev: 398c1eeb61
GitHub-Pull-Request: golang/go#24536
Reviewed-on: https://go-review.googlesource.com/102535
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-26 17:40:01 +00:00
Agniva De Sarker
665af046c2 io: document that ReadAtLeast and ReadFull can drop errors
Add a note that if an error is returned after having read
at least the minimum no. of bytes, the error is set to nil.

Fixes #20477

Change-Id: I75ba5ee967be3ff80249e40d459da4afeeb53463
Reviewed-on: https://go-review.googlesource.com/102459
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-26 17:38:36 +00:00
Hana Kim
68a1c9c400 internal/trace: compute span stats as computing goroutine stats
Move part of UserSpan event processing from cmd/trace.analyzeAnnotations
to internal/trace.GoroutineStats that returns analyzed per-goroutine
execution information. Now the execution information includes list of
spans and their execution information.

cmd/trace.analyzeAnnotations utilizes the span execution information
from internal/trace.GoroutineStats and connects them with task
information.

Change-Id: Ib7f79a3ba652a4ae55cd81ea17565bcc7e241c5c
Reviewed-on: https://go-review.googlesource.com/101917
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Peter Weinberger <pjw@google.com>
2018-03-26 16:59:01 +00:00
Ilya Tocar
24cd112086 cmd/compile/internal/ssa: optimize away double NEG on amd64
When lowering some ops on amd64 we generate additional NEGQ.
This may result in code like this:

NEGQ R12
NEGQ R12

Optimize it away. Gain is not significant, about ~0.5% gain in geomean
in compress/flate and 200 bytes codesize reduction in go tool.

Full results below:

name                             old time/op    new time/op    delta
Encode/Digits/Huffman/1e4-6        65.8µs ± 0%    65.7µs ± 0%  -0.21%  (p=0.010 n=10+9)
Encode/Digits/Huffman/1e5-6         633µs ± 0%     632µs ± 0%    ~     (p=0.370 n=8+9)
Encode/Digits/Huffman/1e6-6        6.30ms ± 1%    6.29ms ± 1%    ~     (p=0.796 n=10+10)
Encode/Digits/Speed/1e4-6           281µs ± 0%     280µs ± 1%  -0.34%  (p=0.043 n=8+10)
Encode/Digits/Speed/1e5-6          2.66ms ± 0%    2.66ms ± 0%  -0.09%  (p=0.043 n=10+10)
Encode/Digits/Speed/1e6-6          26.3ms ± 0%    26.3ms ± 0%    ~     (p=0.190 n=10+10)
Encode/Digits/Default/1e4-6         554µs ± 0%     557µs ± 0%  +0.46%  (p=0.001 n=9+10)
Encode/Digits/Default/1e5-6        8.63ms ± 1%    8.62ms ± 1%    ~     (p=0.912 n=10+10)
Encode/Digits/Default/1e6-6        92.7ms ± 1%    92.2ms ± 1%    ~     (p=0.052 n=10+10)
Encode/Digits/Compression/1e4-6     558µs ± 1%     557µs ± 1%    ~     (p=0.481 n=10+10)
Encode/Digits/Compression/1e5-6    8.58ms ± 0%    8.61ms ± 1%    ~     (p=0.315 n=8+10)
Encode/Digits/Compression/1e6-6    92.3ms ± 1%    92.4ms ± 1%    ~     (p=0.971 n=10+10)
Encode/Twain/Huffman/1e4-6         89.5µs ± 0%    89.0µs ± 1%  -0.48%  (p=0.001 n=9+9)
Encode/Twain/Huffman/1e5-6          727µs ± 1%     728µs ± 0%    ~     (p=0.604 n=10+9)
Encode/Twain/Huffman/1e6-6         7.21ms ± 0%    7.19ms ± 1%    ~     (p=0.696 n=8+10)
Encode/Twain/Speed/1e4-6            320µs ± 1%     321µs ± 1%    ~     (p=0.353 n=10+10)
Encode/Twain/Speed/1e5-6           2.63ms ± 0%    2.62ms ± 1%  -0.33%  (p=0.016 n=8+10)
Encode/Twain/Speed/1e6-6           25.8ms ± 0%    25.8ms ± 0%    ~     (p=0.360 n=10+8)
Encode/Twain/Default/1e4-6          677µs ± 1%     671µs ± 1%  -0.88%  (p=0.000 n=10+10)
Encode/Twain/Default/1e5-6         10.5ms ± 1%    10.3ms ± 0%  -2.06%  (p=0.000 n=10+10)
Encode/Twain/Default/1e6-6          113ms ± 1%     111ms ± 1%  -1.96%  (p=0.000 n=10+9)
Encode/Twain/Compression/1e4-6      688µs ± 0%     679µs ± 1%  -1.30%  (p=0.000 n=7+10)
Encode/Twain/Compression/1e5-6     11.6ms ± 1%    11.3ms ± 1%  -2.10%  (p=0.000 n=10+10)
Encode/Twain/Compression/1e6-6      126ms ± 1%     124ms ± 0%  -1.57%  (p=0.000 n=10+10)
[Geo mean]                         3.45ms         3.44ms       -0.46%

name                             old speed      new speed      delta
Encode/Digits/Huffman/1e4-6       152MB/s ± 0%   152MB/s ± 0%  +0.21%  (p=0.009 n=10+9)
Encode/Digits/Huffman/1e5-6       158MB/s ± 0%   158MB/s ± 0%    ~     (p=0.336 n=8+9)
Encode/Digits/Huffman/1e6-6       159MB/s ± 1%   159MB/s ± 1%    ~     (p=0.781 n=10+10)
Encode/Digits/Speed/1e4-6        35.6MB/s ± 0%  35.7MB/s ± 1%  +0.34%  (p=0.020 n=8+10)
Encode/Digits/Speed/1e5-6        37.6MB/s ± 0%  37.7MB/s ± 0%  +0.09%  (p=0.049 n=10+10)
Encode/Digits/Speed/1e6-6        38.0MB/s ± 0%  38.0MB/s ± 0%    ~     (p=0.146 n=10+10)
Encode/Digits/Default/1e4-6      18.0MB/s ± 0%  18.0MB/s ± 0%  -0.45%  (p=0.002 n=9+10)
Encode/Digits/Default/1e5-6      11.6MB/s ± 1%  11.6MB/s ± 1%    ~     (p=0.644 n=10+10)
Encode/Digits/Default/1e6-6      10.8MB/s ± 1%  10.8MB/s ± 1%  +0.51%  (p=0.044 n=10+10)
Encode/Digits/Compression/1e4-6  17.9MB/s ± 1%  17.9MB/s ± 1%    ~     (p=0.468 n=10+10)
Encode/Digits/Compression/1e5-6  11.7MB/s ± 0%  11.6MB/s ± 1%    ~     (p=0.322 n=8+10)
Encode/Digits/Compression/1e6-6  10.8MB/s ± 1%  10.8MB/s ± 1%    ~     (p=0.983 n=10+10)
Encode/Twain/Huffman/1e4-6        112MB/s ± 0%   112MB/s ± 1%  +0.42%  (p=0.002 n=8+9)
Encode/Twain/Huffman/1e5-6        138MB/s ± 1%   137MB/s ± 0%    ~     (p=0.616 n=10+9)
Encode/Twain/Huffman/1e6-6        139MB/s ± 0%   139MB/s ± 1%    ~     (p=0.652 n=8+10)
Encode/Twain/Speed/1e4-6         31.3MB/s ± 1%  31.2MB/s ± 1%    ~     (p=0.342 n=10+10)
Encode/Twain/Speed/1e5-6         38.0MB/s ± 0%  38.1MB/s ± 1%  +0.33%  (p=0.011 n=8+10)
Encode/Twain/Speed/1e6-6         38.8MB/s ± 0%  38.7MB/s ± 0%    ~     (p=0.325 n=10+8)
Encode/Twain/Default/1e4-6       14.8MB/s ± 1%  14.9MB/s ± 1%  +0.88%  (p=0.000 n=10+10)
Encode/Twain/Default/1e5-6       9.48MB/s ± 1%  9.68MB/s ± 0%  +2.11%  (p=0.000 n=10+10)
Encode/Twain/Default/1e6-6       8.86MB/s ± 1%  9.03MB/s ± 1%  +1.97%  (p=0.000 n=10+9)
Encode/Twain/Compression/1e4-6   14.5MB/s ± 0%  14.7MB/s ± 1%  +1.31%  (p=0.000 n=7+10)
Encode/Twain/Compression/1e5-6   8.63MB/s ± 1%  8.82MB/s ± 1%  +2.17%  (p=0.000 n=10+10)
Encode/Twain/Compression/1e6-6   7.92MB/s ± 1%  8.05MB/s ± 1%  +1.59%  (p=0.000 n=10+10)
[Geo mean]                       29.0MB/s       29.1MB/s       +0.47%

// symSizeComp `which go` go_old:

section differences:
global text (code) = 203 bytes (0.005131%)
read-only data = 1 bytes (0.000057%)
Total difference 204 bytes (0.003297%)

Change-Id: Ie2cdfa1216472d78694fff44d215b3b8e71cf7bf
Reviewed-on: https://go-review.googlesource.com/102277
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
2018-03-26 16:19:53 +00:00
Hana (Hyang-Ah) Kim
ea1f483240 cmd/trace: beautify goroutine page
- Summary: also includes links to pprof data.
- Sortable table: sorting is done on server-side. The intention is
  that later, I want to add pagination feature and limit the page
  size the browser has to handle.
- Stacked horizontal bar graph to present total time breakdown.
- Human-friendly time representation.
- No dependency on external fancy javascript libraries to allow
  it to function without an internet connection.

Change-Id: I91e5c26746e59ad0329dfb61e096e11f768c7b73
Reviewed-on: https://go-review.googlesource.com/102156
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Bonventre <andybons@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
2018-03-26 15:36:56 +00:00
Alex Brainman
d2dd2e1524 os: do not test Lstat in TestDevNullFile
CL 102456 added Lstat check to TestDevNullFile.
But some systems have /dev/null as a symlink,
so Lstat test is wrong. Remove the test.

Fixes #24521

Change-Id: I149110b08dd05db6495ec4eccbcf943e444332f9
Reviewed-on: https://go-review.googlesource.com/102461
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-03-26 09:23:22 +00:00
Alberto Donizetti
2ba98f1ae9 cmd/compile: avoid some allocations in regalloc
Compilebench:
name      old time/op       new time/op       delta
Template        283ms ± 3%        281ms ± 4%    ~     (p=0.242 n=20+20)
Unicode         137ms ± 6%        135ms ± 6%    ~     (p=0.194 n=20+19)
GoTypes         890ms ± 2%        883ms ± 1%  -0.74%  (p=0.001 n=19+19)
Compiler        4.21s ± 2%        4.20s ± 2%  -0.40%  (p=0.033 n=20+19)
SSA             9.86s ± 2%        9.68s ± 1%  -1.80%  (p=0.000 n=20+19)
Flate           185ms ± 5%        185ms ± 7%    ~     (p=0.429 n=20+20)
GoParser        222ms ± 3%        222ms ± 4%    ~     (p=0.588 n=19+20)
Reflect         572ms ± 2%        570ms ± 3%    ~     (p=0.113 n=19+20)
Tar             263ms ± 4%        259ms ± 2%  -1.41%  (p=0.013 n=20+20)
XML             321ms ± 2%        321ms ± 4%    ~     (p=0.835 n=20+19)

name      old user-time/op  new user-time/op  delta
Template        400ms ± 5%        405ms ± 5%    ~     (p=0.096 n=20+20)
Unicode         217ms ± 8%        213ms ± 8%    ~     (p=0.242 n=20+20)
GoTypes         1.23s ± 3%        1.22s ± 3%    ~     (p=0.923 n=19+20)
Compiler        5.76s ± 6%        5.81s ± 2%    ~     (p=0.687 n=20+19)
SSA             14.2s ± 4%        14.0s ± 4%    ~     (p=0.121 n=20+20)
Flate           248ms ± 7%        251ms ±10%    ~     (p=0.369 n=20+20)
GoParser        308ms ± 5%        305ms ± 6%    ~     (p=0.336 n=19+20)
Reflect         771ms ± 2%        766ms ± 2%    ~     (p=0.113 n=20+19)
Tar             370ms ± 5%        362ms ± 7%  -2.06%  (p=0.036 n=19+20)
XML             435ms ± 4%        432ms ± 5%    ~     (p=0.369 n=20+20)

name      old alloc/op      new alloc/op      delta
Template       39.5MB ± 0%       39.4MB ± 0%  -0.20%  (p=0.000 n=20+20)
Unicode        29.1MB ± 0%       29.1MB ± 0%    ~     (p=0.064 n=20+20)
GoTypes         117MB ± 0%        117MB ± 0%  -0.17%  (p=0.000 n=20+20)
Compiler        503MB ± 0%        502MB ± 0%  -0.15%  (p=0.000 n=19+19)
SSA            1.42GB ± 0%       1.42GB ± 0%  -0.16%  (p=0.000 n=20+20)
Flate          25.3MB ± 0%       25.3MB ± 0%  -0.19%  (p=0.000 n=20+20)
GoParser       31.4MB ± 0%       31.3MB ± 0%  -0.14%  (p=0.000 n=20+18)
Reflect        78.1MB ± 0%       77.9MB ± 0%  -0.34%  (p=0.000 n=20+19)
Tar            40.1MB ± 0%       40.0MB ± 0%  -0.17%  (p=0.000 n=20+20)
XML            45.3MB ± 0%       45.2MB ± 0%  -0.13%  (p=0.000 n=20+20)

name      old allocs/op     new allocs/op     delta
Template         393k ± 0%         392k ± 0%  -0.21%  (p=0.000 n=20+19)
Unicode          337k ± 0%         337k ± 0%  -0.02%  (p=0.000 n=20+20)
GoTypes         1.22M ± 0%        1.22M ± 0%  -0.21%  (p=0.000 n=20+20)
Compiler        4.77M ± 0%        4.76M ± 0%  -0.16%  (p=0.000 n=20+20)
SSA             11.8M ± 0%        11.8M ± 0%  -0.12%  (p=0.000 n=20+20)
Flate            242k ± 0%         241k ± 0%  -0.20%  (p=0.000 n=20+20)
GoParser         324k ± 0%         324k ± 0%  -0.14%  (p=0.000 n=20+20)
Reflect          985k ± 0%         981k ± 0%  -0.38%  (p=0.000 n=20+20)
Tar              403k ± 0%         402k ± 0%  -0.19%  (p=0.000 n=20+20)
XML              424k ± 0%         424k ± 0%  -0.16%  (p=0.000 n=19+20)

Change-Id: I131e382b64cd6db11a9263a477d45d80c180c499
Reviewed-on: https://go-review.googlesource.com/102421
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-25 18:27:49 +00:00
Agniva De Sarker
c0ce2925bd net/http: use top-level font media type
RFC 8081 declares a top level font media type for all types of fonts.
Updating the mime types in sniffer to reflect the new changes.

Fixes #24524

Change-Id: Iba6cef4c5974e9930e14705720d42550ee87ba56
Reviewed-on: https://go-review.googlesource.com/102458
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-25 17:36:45 +00:00
Alex Brainman
48c4eeeed7 os: treat "nul" as DevNull file on windows
Also add more tests to test both nul and NUL on windows.

Fixes #24482

Change-Id: I3dfe68ec8de7f90ca869c1096dde0054df3c5cf6
Reviewed-on: https://go-review.googlesource.com/102457
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-03-25 08:33:21 +00:00
Josh Bleecher Snyder
5ce92d0384 net: deflake lookup tests
The build dashboard is dotted with net test failures.
We cannot declare all builders to have flaky networks,
although all fundamentally do.

Instead, add a simple retry/backoff loop to the ones that
show up most commonly on the dashboard at this moment.

If this approach works well in practice, we can
incrementally apply it to other flaky net tests.

Change-Id: I69c1ca6ce5b347ad549c7eb18d0438373f6e2489
Reviewed-on: https://go-review.googlesource.com/102397
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-25 05:44:39 +00:00
Kevin Burke
6f08b9faf2 database/sql: add more examples
This aims to expand the coverage of examples showing how the sql
package works, as well as to address a number of issues I've observed
while explaining how the database package works:

- The best way to issue UPDATE or INSERT queries, that don't need
to scan anything in return. (Previously, we had no examples for any
Execute statement).

- How to use prepared statements and transactions.

- How to aggregate arguments from a Query/QueryContext query into
a slice.

Furthermore just having examples in more places should help, as users
click on e.g. the "Rows" return parameter and are treated with the
lack of any example about how Rows is used.

Switch package examples to use QueryContext/QueryRowContext; I think
it is a good practice to prepare users to issue queries with a timeout
attached, even if they are not using it immediately.

Change-Id: I4e63af91c7e4fff88b25f820906104ecefde4cc3
Reviewed-on: https://go-review.googlesource.com/91015
Reviewed-by: Daniel Theophanes <kardianos@gmail.com>
Run-TryBot: Daniel Theophanes <kardianos@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-03-25 05:09:57 +00:00
Alex Brainman
782f9ce52f os: document DevNull on windows
DevNull is documented on darwin, dragonfly, freebsd, linux,
nacl, netbsd, openbsd, solaris and plan9, but not on windows.
Add missing documentation.

Change-Id: Icdbded0dd5e322ed4360cbce6bee4cdca5cfbe72
Reviewed-on: https://go-review.googlesource.com/102456
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-25 00:45:33 +00:00
Daniel Martí
8da180f6ca all: remove some unused return parameters
As found by unparam. Picked the low-hanging fruit, consisting only of
errors that were always nil and results that were never used. Left out
those that were useful for consistency with other func signatures.

Change-Id: I06b52bbd3541f8a5d66659c909bd93cb3e172018
Reviewed-on: https://go-review.googlesource.com/102418
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-24 19:44:47 +00:00
Daniel Martí
b1892d740e cmd/compile/internal/gc: various cleanups
Remove a couple of unnecessary var declarations, an unused sort.Sort
type, and simplify a range by using the two-name variant.

Change-Id: Ia251f634db0bfbe8b1d553b8659272ddbd13b2c3
Reviewed-on: https://go-review.googlesource.com/102336
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-03-24 19:44:18 +00:00
Agniva De Sarker
bf8eef2adc net/http: add sniffing support for woff2
Sniffing woff2 is now added to the spec -
e29b9f4a22

Change-Id: Ie63744454d0ee54ed0f985c2873d7eb20a14015a
Reviewed-on: https://go-review.googlesource.com/102455
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2018-03-24 19:33:34 +00:00
Daniel Nephin
5526ef1c51 cmd/test2json: document missing "skip" action
Change-Id: I906e61170279f0647598e2fd4fa931aac1b69288
GitHub-Last-Rev: f6df43e8e1
GitHub-Pull-Request: golang/go#24517
Reviewed-on: https://go-review.googlesource.com/102396
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-03-24 18:37:22 +00:00
Alberto Donizetti
a27cd4fd31 test/codegen: port tbz/tbnz arm64 tests
And delete them from asm_test.

Change-Id: I34fcf85ae8ce09cd146fe4ce6a0ae7616bd97e2d
Reviewed-on: https://go-review.googlesource.com/102296
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Giovanni Bajo <rasky@develer.com>
2018-03-24 09:35:53 +00:00
Tobias Klauser
786899a72a runtime: adjust GOARM floating point compatibility error message
As pointed out by Josh Bleecher Snyder in CL 99780.

The check is for GOARM > 6, so suggest to recompile with either GOARM=5
or GOARM=6.

Change-Id: I6a97e87bdc17aa3932f5c8cb598bba85c3cf4be9
Reviewed-on: https://go-review.googlesource.com/101936
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
2018-03-24 04:47:27 +00:00
Giovanni Bajo
d54902ece9 cmd/compile: in prove, shortcircuit self-facts
Sometimes, we can end up calling update with a self-relation
about a variable (x REL x). In this case, there is no need
to record anything: the relation is unsatisfiable if and only
if it doesn't contain eq.

This also helps avoiding infinite loop in next CL that will
introduce transitive closure of relations.

Passes toolstash -cmp.

Change-Id: Ic408452ec1c13653f22ada35466ec98bc14aaa8e
Reviewed-on: https://go-review.googlesource.com/100276
Reviewed-by: Austin Clements <austin@google.com>
2018-03-24 03:06:21 +00:00
Giovanni Bajo
385d936fb2 cmd/compile: in prove, fail fast when unsat is found
When an unsatisfiable relation is recorded in the facts table,
there is no need to compute further relations or updates
additional data structures.

Since we're about to transitively propagate relations, make
sure to fail as fast as possible to avoid doing useless work
in dead branches.

Passes toolstash -cmp.

Change-Id: I23eed376d62776824c33088163c7ac9620abce85
Reviewed-on: https://go-review.googlesource.com/100275
Reviewed-by: Austin Clements <austin@google.com>
2018-03-24 03:06:01 +00:00