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  1. 13 Apr, 2019 2 commits
  3. 12 Apr, 2019 11 commits
  5. 11 Apr, 2019 11 commits
  7. 10 Apr, 2019 10 commits
  9. 09 Apr, 2019 6 commits
    • Cherry Zhang's avatar
      cmd/internal/obj/x86: allow non-zero offset in TLS reference · 68c66414
      Cherry Zhang authored 
      An instruction that references TLS, e.g.

MOVQ	0(TLS), AX

on some platforms (e.g. Android), or in shared mode, may be
translated to (assuming TLS offset already loaded to CX)

MOVQ	0(CX)(TLS*1), AX

which in turns translates to

movq	%fs:(%rcx), %rax

We have rejected non-zero offset for TLS reference, like 16(TLS).
Actually, the instruction can take offset, i.e. it is a valid
instruction for, e.g.,

movq	%fs:16(%rcx),%rcx

So, allow offset in TLS reference.

Change-Id: Iaf1996bad7fe874e0c298ea441af5acb136a4028
Reviewed-on: https://go-review.googlesource.com/c/go/+/171151
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      68c66414
    • Tobias Klauser's avatar
      strings: add TestIndexByte · 016625c2
      Tobias Klauser authored 
      Add TestIndexByte to package strings similar to the already existing
TestIndexByte in package bytes.

Change-Id: Ib60695cb326156a4fe48138c66393ebbd11e4a25
Reviewed-on: https://go-review.googlesource.com/c/go/+/171197
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      016625c2
    • Tobias Klauser's avatar
      strings: use Go style character range comparison in ToUpper/ToLower · 78175474
      Tobias Klauser authored 
      As noted by Brad in CL 170954 for package bytes.

Change-Id: I2772a356299e54ba5b7884d537e6649039adb9be
Reviewed-on: https://go-review.googlesource.com/c/go/+/171198
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      78175474
    • Andrei Vagin's avatar
      runtime: preempt a goroutine which calls a lot of short system calls · 4166ff42
      Andrei Vagin authored 
      A goroutine should be preempted if it runs for 10ms without blocking.
We found that this doesn't work for goroutines which call short system calls.

For example, the next program can stuck for seconds without this fix:

$ cat main.go
package main

import (
	"runtime"
	"syscall"
)

func main() {
	runtime.GOMAXPROCS(1)
	c := make(chan int)
	go func() {
		c <- 1
		for {
			t := syscall.Timespec{
				Nsec: 300,
			}
			if true {
				syscall.Nanosleep(&t, nil)
			}
		}
	}()
	<-c
}

$ time go run main.go

real	0m8.796s
user	0m0.367s
sys	0m0.893s

Updates #10958

Change-Id: Id3be54d3779cc28bfc8b33fe578f13778f1ae2a2
Reviewed-on: https://go-review.googlesource.com/c/go/+/170138Reviewed-by: default avatarDmitry Vyukov <dvyukov@google.com>
Run-TryBot: Dmitry Vyukov <dvyukov@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      4166ff42
    • Tobias Klauser's avatar
      bytes: optimize ToLower and ToUpper for ASCII-only case · 08e1823a
      Tobias Klauser authored 
      Follow what CL 68370 and CL 76470 did for the respective functions in
package strings.

Also adjust godoc strings to match the respective strings functions and
mention the special case for ASCII-only byte slices which don't need
conversion.

name                                       old time/op  new time/op  delta
ToUpper/#00-8                              9.35ns ± 3%  6.08ns ± 2%  -35.04%  (p=0.000 n=9+9)
ToUpper/ONLYUPPER-8                        77.7ns ± 1%  16.9ns ± 2%  -78.22%  (p=0.000 n=10+10)
ToUpper/abc-8                              36.5ns ± 1%  22.1ns ± 1%  -39.43%  (p=0.000 n=10+8)
ToUpper/AbC123-8                           56.9ns ± 2%  28.2ns ± 2%  -50.54%  (p=0.000 n=8+10)
ToUpper/azAZ09_-8                          62.3ns ± 1%  26.9ns ± 1%  -56.82%  (p=0.000 n=9+10)
ToUpper/longStrinGwitHmixofsmaLLandcAps-8   219ns ± 2%    63ns ± 2%  -71.17%  (p=0.000 n=10+10)
ToUpper/longɐstringɐwithɐnonasciiⱯchars-8   367ns ± 2%   374ns ± 3%   +2.05%  (p=0.000 n=9+10)
ToUpper/ɐɐɐɐɐ-8                             200ns ± 1%   206ns ± 1%   +2.49%  (p=0.000 n=10+10)
ToUpper/a\u0080\U0010ffff-8                90.4ns ± 1%  93.8ns ± 0%   +3.82%  (p=0.000 n=10+7)
ToLower/#00-8                              9.59ns ± 1%  6.13ns ± 2%  -36.08%  (p=0.000 n=10+10)
ToLower/abc-8                              36.4ns ± 1%  10.4ns ± 1%  -71.50%  (p=0.000 n=10+10)
ToLower/AbC123-8                           55.8ns ± 1%  27.5ns ± 1%  -50.61%  (p=0.000 n=10+10)
ToLower/azAZ09_-8                          61.7ns ± 1%  30.2ns ± 1%  -50.98%  (p=0.000 n=8+10)
ToLower/longStrinGwitHmixofsmaLLandcAps-8   226ns ± 1%    64ns ± 1%  -71.53%  (p=0.000 n=10+9)
ToLower/LONGⱯSTRINGⱯWITHⱯNONASCIIⱯCHARS-8   354ns ± 0%   361ns ± 0%   +2.18%  (p=0.000 n=10+10)
ToLower/ⱭⱭⱭⱭⱭ-8                             180ns ± 1%   186ns ± 0%   +3.45%  (p=0.000 n=10+9)
ToLower/A\u0080\U0010ffff-8                91.7ns ± 0%  94.5ns ± 0%   +2.99%  (p=0.000 n=10+10)

Change-Id: Ifdb8ae328ff9feacd1c170db8eebbf98c399e204
Reviewed-on: https://go-review.googlesource.com/c/go/+/170954
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarKeith Randall <khr@golang.org>
      08e1823a
    • Mikio Hara's avatar
      syscall: gofmt -w -s · 2ab75c0f
      Mikio Hara authored 
      Change-Id: Ib46f1a528e16cd0c2617defbf4dcd1f1b582cdc2
Reviewed-on: https://go-review.googlesource.com/c/go/+/171101
Run-TryBot: Mikio Hara <mikioh.public.networking@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      2ab75c0f
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