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  1. 21 Mar, 2017 15 commits
    • Vladimir Stefanovic's avatar
      cmd/compile,runtime: fix atomic And8 for mipsle · 24dc8c6c
      Vladimir Stefanovic authored 
      Removing stray xori that came from big endian copy/paste.
Adding atomicand8 check to runtime.check() that would have revealed
this error.
Might fix #19396.

Change-Id: If8d6f25d3e205496163541eb112548aa66df9c2a
Reviewed-on: https://go-review.googlesource.com/38257
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: 's avatarCherry Zhang <cherryyz@google.com>
      24dc8c6c
    • Lynn Boger's avatar
      cmd/compile: improve LoweredZero performance for ppc64x · 23bd9191
      Lynn Boger authored 
      This change improves the performance of the LoweredZero rule
on ppc64x.

The improvement can be seen in the runtime ClearFat
benchmarks:

BenchmarkClearFat12-16       2.40          0.69          -71.25%
BenchmarkClearFat16-16       9.98          0.93          -90.68%
BenchmarkClearFat24-16       4.75          0.93          -80.42%
BenchmarkClearFat32-16       6.02          0.93          -84.55%
BenchmarkClearFat40-16       7.19          1.16          -83.87%
BenchmarkClearFat48-16       15.0          1.39          -90.73%
BenchmarkClearFat56-16       9.95          1.62          -83.72%
BenchmarkClearFat64-16       18.0          1.86          -89.67%
BenchmarkClearFat128-16      30.0          8.08          -73.07%
BenchmarkClearFat256-16      52.5          11.3          -78.48%
BenchmarkClearFat512-16      97.0          19.0          -80.41%
BenchmarkClearFat1024-16     244           34.2          -85.98%

Fixes: #19532

Change-Id: If493e28bc1d8e61bc79978498be9f5336a36cd3f
Reviewed-on: https://go-review.googlesource.com/38096
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: 's avatarMichael Munday <munday@ca.ibm.com>
      23bd9191
    • Volker Dobler's avatar
      net/http/cookiejar: fix out-of-bounds errors on malformed domains · d972dc2d
      Volker Dobler authored 
      The old implementation of Jar made the assumption that the host names
in the URLs given to SetCookies() and Cookies() methods are well-formed.
This is not an unreasonable assumption as malformed host names do not
trigger calls to SetCookies or Cookies (at least not from net/http)
as the HTTP request themselves are not executed. But there can be other
invocations of these methods and at least on Linux it was possible to
make DNS lookup to domain names with two trailing dots (see issue #7122).

This is an old bug and this CL revives an old change (see
https://codereview.appspot.com/52100043) to fix the issue. The discussion
around 52100043 focused on the interplay between the jar and the
public suffix list and who is responsible for which type if domain name
canonicalization. The new bug report in issue #19384 used a nil public
suffix list which demonstrates that the package cookiejar alone exhibits
this problem and any solution cannot be fully delegated to the
implementation of the used PublicSuffixList: Package cookiejar itself
needs to protect against host names of the form ".." which triggered an
out-of-bounds error.

This CL does not address the issue of host name canonicalization and
the question who is responsible for it. This CL just prevents the
out-of-bounds error: It is a very conservative change, i.e. one might
still set and retrieve cookies for host names like "weird.stuf...".
Several more test cases document how the current code works.

Fixes #19384.

Change-Id: I14be080e8a2a0b266ced779f2aeb18841b730610
Reviewed-on: https://go-review.googlesource.com/37843
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: 's avatarRuss Cox <rsc@golang.org>
      d972dc2d
    • Hugues Bruant's avatar
      runtime: add mapdelete_fast* · 5d6b7fca
      Hugues Bruant authored 
      Add benchmarks for map delete with int32/int64/string key

Benchmark results on darwin/amd64

name                 old time/op  new time/op  delta
MapDelete/Int32/1-8   151ns ± 8%    99ns ± 3%  -34.39%  (p=0.008 n=5+5)
MapDelete/Int32/2-8   128ns ± 2%   111ns ±15%  -13.40%  (p=0.040 n=5+5)
MapDelete/Int32/4-8   128ns ± 5%   114ns ± 2%  -10.82%  (p=0.008 n=5+5)
MapDelete/Int64/1-8   144ns ± 0%   104ns ± 3%  -27.53%  (p=0.016 n=4+5)
MapDelete/Int64/2-8   153ns ± 1%   126ns ± 3%  -17.17%  (p=0.008 n=5+5)
MapDelete/Int64/4-8   178ns ± 3%   136ns ± 2%  -23.60%  (p=0.008 n=5+5)
MapDelete/Str/1-8     187ns ± 3%   171ns ± 3%   -8.54%  (p=0.008 n=5+5)
MapDelete/Str/2-8     221ns ± 3%   206ns ± 4%   -7.18%  (p=0.016 n=5+4)
MapDelete/Str/4-8     256ns ± 5%   232ns ± 2%   -9.36%  (p=0.016 n=4+5)

name                     old time/op    new time/op    delta
BinaryTree17-8              2.78s ± 7%     2.70s ± 1%    ~     (p=0.151 n=5+5)
Fannkuch11-8                3.21s ± 2%     3.19s ± 1%    ~     (p=0.310 n=5+5)
FmtFprintfEmpty-8          49.1ns ± 3%    50.2ns ± 2%    ~     (p=0.095 n=5+5)
FmtFprintfString-8         78.6ns ± 4%    80.2ns ± 5%    ~     (p=0.460 n=5+5)
FmtFprintfInt-8            79.7ns ± 1%    81.0ns ± 3%    ~     (p=0.103 n=5+5)
FmtFprintfIntInt-8          117ns ± 2%     119ns ± 0%    ~     (p=0.079 n=5+4)
FmtFprintfPrefixedInt-8     153ns ± 1%     146ns ± 3%  -4.19%  (p=0.024 n=5+5)
FmtFprintfFloat-8           239ns ± 1%     237ns ± 1%    ~     (p=0.246 n=5+5)
FmtManyArgs-8               506ns ± 2%     509ns ± 2%    ~     (p=0.238 n=5+5)
GobDecode-8                7.06ms ± 4%    6.86ms ± 1%    ~     (p=0.222 n=5+5)
GobEncode-8                6.01ms ± 5%    5.87ms ± 2%    ~     (p=0.222 n=5+5)
Gzip-8                      246ms ± 4%     236ms ± 1%  -4.12%  (p=0.008 n=5+5)
Gunzip-8                   37.7ms ± 4%    37.3ms ± 1%    ~     (p=0.841 n=5+5)
HTTPClientServer-8         64.9µs ± 1%    64.4µs ± 0%  -0.80%  (p=0.032 n=5+4)
JSONEncode-8               16.0ms ± 2%    16.2ms ±11%    ~     (p=0.548 n=5+5)
JSONDecode-8               53.2ms ± 2%    53.1ms ± 4%    ~     (p=1.000 n=5+5)
Mandelbrot200-8            4.33ms ± 2%    4.32ms ± 2%    ~     (p=0.841 n=5+5)
GoParse-8                  3.24ms ± 2%    3.27ms ± 4%    ~     (p=0.690 n=5+5)
RegexpMatchEasy0_32-8      86.2ns ± 1%    85.2ns ± 3%    ~     (p=0.286 n=5+5)
RegexpMatchEasy0_1K-8       198ns ± 2%     199ns ± 1%    ~     (p=0.310 n=5+5)
RegexpMatchEasy1_32-8      82.6ns ± 2%    81.8ns ± 1%    ~     (p=0.294 n=5+5)
RegexpMatchEasy1_1K-8       359ns ± 2%     354ns ± 1%  -1.39%  (p=0.048 n=5+5)
RegexpMatchMedium_32-8      123ns ± 2%     123ns ± 1%    ~     (p=0.905 n=5+5)
RegexpMatchMedium_1K-8     38.2µs ± 2%    38.6µs ± 8%    ~     (p=0.690 n=5+5)
RegexpMatchHard_32-8       1.92µs ± 2%    1.91µs ± 5%    ~     (p=0.460 n=5+5)
RegexpMatchHard_1K-8       57.6µs ± 1%    57.0µs ± 2%    ~     (p=0.310 n=5+5)
Revcomp-8                   483ms ± 7%     441ms ± 1%  -8.79%  (p=0.016 n=5+4)
Template-8                 58.0ms ± 1%    58.2ms ± 7%    ~     (p=0.310 n=5+5)
TimeParse-8                 324ns ± 6%     312ns ± 2%    ~     (p=0.087 n=5+5)
TimeFormat-8                330ns ± 1%     329ns ± 1%    ~     (p=0.968 n=5+5)

name                     old speed      new speed      delta
GobDecode-8               109MB/s ± 4%   112MB/s ± 1%    ~     (p=0.222 n=5+5)
GobEncode-8               128MB/s ± 5%   131MB/s ± 2%    ~     (p=0.222 n=5+5)
Gzip-8                   78.9MB/s ± 4%  82.3MB/s ± 1%  +4.25%  (p=0.008 n=5+5)
Gunzip-8                  514MB/s ± 4%   521MB/s ± 1%    ~     (p=0.841 n=5+5)
JSONEncode-8              121MB/s ± 2%   120MB/s ±10%    ~     (p=0.548 n=5+5)
JSONDecode-8             36.5MB/s ± 2%  36.6MB/s ± 4%    ~     (p=1.000 n=5+5)
GoParse-8                17.9MB/s ± 2%  17.7MB/s ± 4%    ~     (p=0.730 n=5+5)
RegexpMatchEasy0_32-8     371MB/s ± 1%   375MB/s ± 3%    ~     (p=0.310 n=5+5)
RegexpMatchEasy0_1K-8    5.15GB/s ± 1%  5.13GB/s ± 1%    ~     (p=0.548 n=5+5)
RegexpMatchEasy1_32-8     387MB/s ± 2%   391MB/s ± 1%    ~     (p=0.310 n=5+5)
RegexpMatchEasy1_1K-8    2.85GB/s ± 2%  2.89GB/s ± 1%    ~     (p=0.056 n=5+5)
RegexpMatchMedium_32-8   8.07MB/s ± 2%  8.06MB/s ± 1%    ~     (p=0.730 n=5+5)
RegexpMatchMedium_1K-8   26.8MB/s ± 2%  26.6MB/s ± 7%    ~     (p=0.690 n=5+5)
RegexpMatchHard_32-8     16.7MB/s ± 2%  16.7MB/s ± 5%    ~     (p=0.421 n=5+5)
RegexpMatchHard_1K-8     17.8MB/s ± 1%  18.0MB/s ± 2%    ~     (p=0.310 n=5+5)
Revcomp-8                 527MB/s ± 6%   577MB/s ± 1%  +9.44%  (p=0.016 n=5+4)
Template-8               33.5MB/s ± 1%  33.4MB/s ± 7%    ~     (p=0.310 n=5+5)

Updates #19495

Change-Id: Ib9ece1690813d9b4788455db43d30891e2138df5
Reviewed-on: https://go-review.googlesource.com/38172Reviewed-by: 's avatarHugues Bruant <hugues.bruant@gmail.com>
Reviewed-by: 's avatarKeith Randall <khr@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      5d6b7fca
    • Alex Brainman's avatar
      runtime: import os package in BenchmarkRunningGoProgram · f2b79cad
      Alex Brainman authored 
      I would like to use BenchmarkRunningGoProgram to measure
changes for issue #15588. So the program in the benchmark
should import "os" package.

It is also reasonable that basic Go program includes
"os" package.

For #15588.

Change-Id: Ida6712eab22c2e79fbe91b6fdd492eaf31756852
Reviewed-on: https://go-review.googlesource.com/37914
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: 's avatarIan Lance Taylor <iant@golang.org>
      f2b79cad
    • Josh Bleecher Snyder's avatar
      cmd/compile: fix pos of typenames created during SSA construction · 165a96e2
      Josh Bleecher Snyder authored 
      Prior to this CL, the function's position was used.
The dottype Node's position is clearly better.

I'm not thrilled about introducing a reference to
lineno in the middle of SSA construction;
I will have to remove it later.
My immediate goal is stability and correctness of positions,
though, since that aids refactoring, so this is an improvement.

An example from package io:

func (t *multiWriter) WriteString(s string) (n int, err error) {
	var p []byte // lazily initialized if/when needed
	for _, w := range t.writers {
		if sw, ok := w.(stringWriter); ok {
			n, err = sw.WriteString(s)

The w.(stringWriter) type assertion includes loading
the address of static type data for stringWriter:

LEAQ	type."".stringWriter(SB), R10

Prior to this CL, this instruction was given the line number
of the function declaration.
After this CL, this instruction is given the line number
of the type assertion itself.

Change-Id: Ifcca274b581a5a57d7e3102c4d7b7786bf307210
Reviewed-on: https://go-review.googlesource.com/38389
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: 's avatarMatthew Dempsky <mdempsky@google.com>
      165a96e2
    • Rob Pike's avatar
      encoding/gob: document the extra byte after a singleton · 67a46cc1
      Rob Pike authored 
      This paragraph has been added, as the notion was missing from the
documentation.

If a value is passed to Encode and the type is not a struct (or pointer to struct,
etc.), for simplicity of processing it is represented as a struct of one field.
The only visible effect of this is to encode a zero byte after the value, just as
after the last field of an encoded struct, so that the decode algorithm knows when
the top-level value is complete.

Fixes #16978

Change-Id: I5f008e792d1b6fe80d2e026a7ff716608889db32
Reviewed-on: https://go-review.googlesource.com/38414Reviewed-by: 's avatarIan Lance Taylor <iant@golang.org>
      67a46cc1
    • Rob Pike's avatar
      text/template,html/template: state that Funcs must happen before parsing · 5c5a1069
      Rob Pike authored 
      Any method that affects the parse must happen before parsing.
This obvious point is clear, but it's not clear to some that the
set of defined functions affect the parse.

Fixes #18971

Change-Id: I8b7f8c8cf85b028c18e5ca3b9797de92ea910669
Reviewed-on: https://go-review.googlesource.com/38413Reviewed-by: 's avatarIan Lance Taylor <iant@golang.org>
      5c5a1069
    • Josh Bleecher Snyder's avatar
      cmd/compile: check for missing function body earlier · 0dafb7d9
      Josh Bleecher Snyder authored 
      Tested by fixedbugs/issue3705.go.

This removes a dependency on lineno
from near the backend.

Change-Id: I228bd0ad7295cf881b9bdeb0df9d18483fb96821
Reviewed-on: https://go-review.googlesource.com/38382
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: 's avatarMatthew Dempsky <mdempsky@google.com>
      0dafb7d9
    • Josh Bleecher Snyder's avatar
      cmd/compile: use autogenerated position for init functions · 49a533e2
      Josh Bleecher Snyder authored 
      This eliminates an old TODO,
and stabilizes the position information
for init functions.

Change-Id: Idf2d9a16a60e097ee08f42541b87e170da2f9d3a
Reviewed-on: https://go-review.googlesource.com/38388
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: 's avatarMatthew Dempsky <mdempsky@google.com>
      49a533e2
    • Daniel Martí's avatar
      go/build: remove unused returnImports parameter · 346d5883
      Daniel Martí authored 
      The code uses the filename suffix instead of the bool parameter to
determine what to do.

Fixes #19474.

Change-Id: Ic552a54e50194592a4b4ae7f74d3109af54e6d36
Reviewed-on: https://go-review.googlesource.com/38265
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: 's avatarRuss Cox <rsc@golang.org>
      346d5883
    • Matthew Dempsky's avatar
      cmd/compile/internal/gc: remove unneeded Type.Pos field · 80c4b53e
      Matthew Dempsky authored 
      Change-Id: I9ab650d9d2d0a99186009362454e1eabc9f6bad6
Reviewed-on: https://go-review.googlesource.com/38393
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: 's avatarRobert Griesemer <gri@golang.org>
Reviewed-by: 's avatarBrad Fitzpatrick <bradfitz@golang.org>
      80c4b53e
    • Matthew Dempsky's avatar
      cmd/compile/internal/gc: export interface embedding information · ee272bbf
      Matthew Dempsky authored 
      Fixes #16369.

Change-Id: I23f8c36370d0da37ac5b5126d012d22f78782782
Reviewed-on: https://go-review.googlesource.com/38392
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: 's avatarRobert Griesemer <gri@golang.org>
      ee272bbf
    • Matthew Dempsky's avatar
      cmd/compile/internal/gc: handle recursive interfaces better · 07de3465
      Matthew Dempsky authored 
      Previously, we handled recursive interfaces by deferring typechecking
of interface methods, while eagerly expanding interface embeddings.

This CL switches to eagerly evaluating interface methods, and
deferring expanding interface embeddings to dowidth. This allows us to
detect recursive interface embeddings with the same mechanism used for
detecting recursive struct embeddings.

Updates #16369.

Change-Id: If4c0320058047f8a2d9b52b9a79de47eb9887f95
Reviewed-on: https://go-review.googlesource.com/38391
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: 's avatarRobert Griesemer <gri@golang.org>
      07de3465
    • Jakob Borg's avatar
      net/http: fix ProxyFromEnvironment panic on invalid $NO_PROXY value · 4e35e5fc
      Jakob Borg authored 
      Given an entry in $no_proxy like ":1" we would interpret it as an empty
host name and a port number, then check the first character of the host
name for dots. This would then cause an index out of range panic. This
change simply skips these entries, as the following checks would anyway
have returned false.

Fixes #19536

Change-Id: Iafe9c7a77ad4a6278c8ccb00a1575b56e4bdcd79
Reviewed-on: https://go-review.googlesource.com/38067Reviewed-by: 's avatarBrad Fitzpatrick <bradfitz@golang.org>
      4e35e5fc
  3. 20 Mar, 2017 21 commits
  5. 19 Mar, 2017 4 commits
    • Austin Clements's avatar
      runtime: disallow malloc or panic in scavenge · df6025bc
      Austin Clements authored 
      Mallocs and panics in the scavenge path are particularly nasty because
they're likely to silently self-deadlock on the mheap.lock. Avoid
sinking lots of time into debugging these issues in the future by
turning these into immediate throws.

Change-Id: Ib36fdda33bc90b21c32432b03561630c1f3c69bc
Reviewed-on: https://go-review.googlesource.com/38293
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: 's avatarRick Hudson <rlh@golang.org>
      df6025bc
    • Austin Clements's avatar
      runtime: introduce a type for lfstacks · 13ae271d
      Austin Clements authored 
      The lfstack API is still a C-style API: lfstacks all have unhelpful
type uint64 and the APIs are package-level functions. Make the code
more readable and Go-style by creating an lfstack type with methods
for push, pop, and empty.

Change-Id: I64685fa3be0e82ae2d1a782a452a50974440a827
Reviewed-on: https://go-review.googlesource.com/38290
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: 's avatarBrad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: 's avatarRick Hudson <rlh@golang.org>
      13ae271d
    • Martin Möhrmann's avatar
      cmd/compile: replace all uses of ptrto by typPtr · 2805d206
      Martin Möhrmann authored 
      This makes the overall naming and use of the functions
to create a Type more consistent.

Passes toolstash -cmp.

Change-Id: Ie0d40b42cc32b5ecf5f20502675a225038ea40e4
Reviewed-on: https://go-review.googlesource.com/38354Reviewed-by: 's avatarMatthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      2805d206
    • Martin Möhrmann's avatar
      cmd/compile: reduce allocs when appending to Node slices · 00f4cacb
      Martin Möhrmann authored 
      Rewrite Append function such that the *Node slice argument does not escape.

Passes toolstash -cmp.

name      old alloc/op    new alloc/op    delta
Template     40.8MB ± 0%     40.8MB ± 0%  -0.17%  (p=0.000 n=20+19)
Unicode      30.3MB ± 0%     30.2MB ± 0%  -0.11%  (p=0.000 n=19+20)
GoTypes       115MB ± 0%      115MB ± 0%  -0.20%  (p=0.000 n=20+20)
Compiler      492MB ± 0%      491MB ± 0%  -0.25%  (p=0.000 n=20+20)
SSA           858MB ± 0%      858MB ± 0%  -0.08%  (p=0.000 n=20+20)
Flate        26.2MB ± 0%     26.2MB ± 0%  -0.13%  (p=0.000 n=20+19)
GoParser     32.5MB ± 0%     32.4MB ± 0%  -0.14%  (p=0.000 n=20+20)
Reflect      80.6MB ± 0%     80.4MB ± 0%  -0.27%  (p=0.000 n=20+20)
Tar          27.3MB ± 0%     27.3MB ± 0%  -0.12%  (p=0.000 n=20+19)
XML          43.1MB ± 0%     43.0MB ± 0%  -0.14%  (p=0.000 n=20+20)

name      old allocs/op   new allocs/op   delta
Template       400k ± 1%       397k ± 0%  -0.81%  (p=0.000 n=20+18)
Unicode        321k ± 1%       320k ± 0%  -0.43%  (p=0.000 n=20+20)
GoTypes       1.17M ± 0%      1.16M ± 0%  -0.89%  (p=0.000 n=20+20)
Compiler      4.59M ± 0%      4.54M ± 0%  -1.26%  (p=0.000 n=20+19)
SSA           7.68M ± 0%      7.65M ± 0%  -0.37%  (p=0.000 n=18+18)
Flate          242k ± 1%       240k ± 1%  -0.70%  (p=0.000 n=20+20)
GoParser       323k ± 1%       321k ± 1%  -0.64%  (p=0.000 n=20+20)
Reflect       1.01M ± 0%      1.00M ± 0%  -0.92%  (p=0.000 n=20+19)
Tar            258k ± 1%       256k ± 1%  -0.60%  (p=0.000 n=20+19)
XML            403k ± 1%       400k ± 0%  -0.78%  (p=0.000 n=20+20)

Change-Id: Ie1eb603dc46f729574f6a76c08085b2619249be4
Reviewed-on: https://go-review.googlesource.com/37437Reviewed-by: 's avatarBrad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      00f4cacb