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  1. 29 Nov, 2016 14 commits
    • Brad Fitzpatrick's avatar
      doc: more go1.8.html tweaks and new context additions section · 268bc396
      Brad Fitzpatrick authored 
      TBR=See https://golang.org/cl/33244

Updates #17929

Change-Id: Id5d5472cf1e41472d8d0f82ee133c7387257ba2b
Reviewed-on: https://go-review.googlesource.com/33664Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      268bc396
    • Robert Griesemer's avatar
      cmd/compile/internal/syntax: remove unused node field · 11f8676b
      Robert Griesemer authored 
      The doc field is not yet used - remove it for now (we may end up
with a different solution for 1.9). This reduces memory consumption
for parsing all of std lib by about 40MB and makes parsing slightly
faster.

Change-Id: Iafb00b9c7f1be9c66fdfb29096d3da5049b2fcf5
Reviewed-on: https://go-review.googlesource.com/33661Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: default avatarMatthew Dempsky <mdempsky@google.com>
      11f8676b
    • Daniel Theophanes's avatar
      database/sql: do not bypass the driver locks with Context methods · 0d163ce1
      Daniel Theophanes authored 
      When context methods were initially added it was attempted to unify
behavior between drivers without Context methods and those with
Context methods to always return right away when the Context expired.
However in doing so the driver call could be executed outside of the
scope of the driver connection lock and thus bypassing thread safety.

The new behavior waits until the driver operation is complete. It then
checks to see if the context has expired and if so returns that error.

Change-Id: I4a5c7c3263420c57778f36a5ed6fa0ef8cb32b20
Reviewed-on: https://go-review.googlesource.com/32422Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      0d163ce1
    • Dhananjay Nakrani's avatar
      cmd/go: report position info in package errors · 3825656e
      Dhananjay Nakrani authored 
      Also refactor common position filling code into a function.

Fixes #18011

Change-Id: I76528626da67a7309193fa92af1e361c8e2fcf84
Reviewed-on: https://go-review.googlesource.com/33631
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarIan Lance Taylor <iant@golang.org>
      3825656e
    • Hana Kim's avatar
      internal/pprof/profile: parse mutex profile including comments · b079869d
      Hana Kim authored 
      Skip lines if they are empty or starting with "#" which are valid
legacy pprof output format.

Fixes #18025

Change-Id: I7aee439171496932637b8ae3188700911f569b16
Reviewed-on: https://go-review.googlesource.com/33454Reviewed-by: default avatarPeter Weinberger <pjw@google.com>
      b079869d
    • Michal Bohuslávek's avatar
      net/http/httptest: fix typo in doc comment · 7a92d0b1
      Michal Bohuslávek authored 
      Change-Id: I89f276b32015882437e128814573343a4ca53569
Reviewed-on: https://go-review.googlesource.com/33615Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      7a92d0b1
    • Robert Griesemer's avatar
      cmd/compile: don't panic on syntax error in select statement · 8fa0d85b
      Robert Griesemer authored 
      Fixes #18092.

Change-Id: I54e2da2e0f168c068f5e4a1b22ba508d78259168
Reviewed-on: https://go-review.googlesource.com/33658
TryBot-Result: Gobot Gobot <gobot@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: default avatarMatthew Dempsky <mdempsky@google.com>
      8fa0d85b
    • Austin Clements's avatar
      runtime: fall back to /proc/self/auxv in Android libs · 6f287fa2
      Austin Clements authored 
      Android's libc doesn't provide access to auxv, so currently the Go
runtime synthesizes a fake, minimal auxv when loaded as a library on
Android. This used to be sufficient, but now we depend on auxv to
retrieve the system physical page size and panic if we can't retrieve
it.

Fix this by falling back to reading auxv from /proc/self/auxv if the
loader-provided auxv is empty and removing the synthetic auxv vectors.

Fixes #18041.

Change-Id: Ia2ec2c764a6609331494a5d359032c56cbb83482
Reviewed-on: https://go-review.googlesource.com/33652
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarDavid Crawshaw <crawshaw@golang.org>
      6f287fa2
    • Austin Clements's avatar
      runtime: extract Linux auxv handling · d39b7b53
      Austin Clements authored 
      This refactoring is in preparation for handling auxv differently in
Android shared libraries.

Updates #18041.

Change-Id: If0458a309f9c804e7abd0a58b5a224d89f8da257
Reviewed-on: https://go-review.googlesource.com/33651
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarDavid Crawshaw <crawshaw@golang.org>
      d39b7b53
    • Brad Fitzpatrick's avatar
      doc: more go1.8.html updates · 5d1c6011
      Brad Fitzpatrick authored 
      TBR=See https://golang.org/cl/33244

Updates #17929

Change-Id: I648df63aeb67aa2229c7b4fc23676a78b31140a0
Reviewed-on: https://go-review.googlesource.com/33657Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      5d1c6011
    • Brad Fitzpatrick's avatar
      doc: update go1.8.html after feedback from Russ · 0c5c7c34
      Brad Fitzpatrick authored 
      Address Russ's feedback from https://golang.org/cl/33244

TBR=See https://golang.org/cl/33244

Updates #17929

Change-Id: I708d71f519f6414ecec629d3c273d9e737d8ed50
Reviewed-on: https://go-review.googlesource.com/33656Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      0c5c7c34
    • Ian Lance Taylor's avatar
      cmd/link: handle STT_COMMON symbols · 45f75950
      Ian Lance Taylor authored 
      Tested by running

GOTRACEBACK=2 CGO_CFLAGS="-Wa,--elf-stt-common=yes" go test -ldflags=-linkmode=internal

in misc/cgo/test. That failed before this CL, succeeded after.

I don't think it's worth doing that as a regular test, though,
especially since only recent versions of the GNU binutils support the
--elf-stt-common option.

Fixes #18088.

Change-Id: I893d86181faee217b1504c054b0ed3f7c8d977d3
Reviewed-on: https://go-review.googlesource.com/33653
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
      45f75950
    • Russ Cox's avatar
      os: fix handling of Windows Unicode console input and ^Z · 610d5221
      Russ Cox authored 
      Go 1.5 worked with Unicode console input but not ^Z.
Go 1.6 did not work with Unicode console input but did handle one ^Z case.
Go 1.7 did not work with Unicode console input but did handle one ^Z case.

The intent of this CL is for Go 1.8 to work with Unicode console input
and also handle all ^Z cases.

Here's a simple test program for reading from the console.
It prints a "> " prompt, calls read, prints what it gets, and repeats.

	package main

	import (
	    "fmt"
	    "os"
	)

	func main() {
	    p := make([]byte, 100)
	    fmt.Printf("> ")
	    for {
	        n, err := os.Stdin.Read(p)
	        fmt.Printf("[%d %q %v]\n> ", n, p[:n], err)
	    }
	}

On Unix, typing a ^D produces a break in the input stream.
If the ^D is at the beginning of a line, then the 0 bytes returned
appear as an io.EOF:

	$ go run /tmp/x.go
	> hello
	[6 "hello\n" <nil>]
	> hello^D[5 "hello" <nil>]
	> ^D[0 "" EOF]
	> ^D[0 "" EOF]
	> hello^Dworld
	[5 "hello" <nil>]
	> [6 "world\n" <nil>]
	>

On Windows, the EOF character is ^Z, not ^D, and there has
been a long-standing problem that in Go programs, ^Z on Windows
does not behave in the expected way, namely like ^D on Unix.
Instead, the ^Z come through as literal ^Z characters:

	C:\>c:\go1.5.4\bin\go run x.go
	> ^Z
	[3 "\x1a\r\n" <nil>]
	> hello^Zworld
	[13 "hello\x1aworld\r\n" <nil>]
	>

CL 4310 attempted to fix this bug, then known as #6303,
by changing the use of ReadConsole to ReadFile.
This CL was released as part of Go 1.6 and did fix the case
of a ^Z by itself, but not as part of a larger input:

	C:\>c:\go1.6.3\bin\go run x.go
	> ^Z
	[0 "" EOF]
	> hello^Zworld
	[13 "hello\x1aworld\r\n" <nil>]
	>

So the fix was incomplete.
Worse, the fix broke Unicode console input.

ReadFile does not handle Unicode console input correctly.
To handle Unicode correctly, programs must use ReadConsole.
Early versions of Go used ReadFile to read the console,
leading to incorrect Unicode handling, which was filed as #4760
and fixed in CL 7312053, which switched to ReadConsole
and was released as part of Go 1.1 and still worked as of Go 1.5:

	C:\>c:\go1.5.4\bin\go run x.go
	> hello
	[7 "hello\r\n" <nil>]
	> hello world™
	[16 "hello world™\r\n" <nil>]
	>

But in Go 1.6:

	C:\>c:\go1.6.3\bin\go run x.go
	> hello
	[7 "hello\r\n" <nil>]
	> hello world™
	[0 "" EOF]
	>

That is, changing back to ReadFile in Go 1.6 reintroduced #4760,
which has been refiled as #17097. (We have no automated test
for this because we don't know how to simulate console input
in a test: it appears that one must actually type at a keyboard
to use the real APIs. This CL at least adds a comment warning
not to reintroduce ReadFile again.)

CL 29493 attempted to fix #17097, but it was not a complete fix:
the hello world™ example above still fails, as does Shift-JIS input,
which was filed as #17939.

CL 29493 also broke ^Z handling, which was filed as #17427.

This CL attempts the never before successfully performed trick
of simultaneously fixing Unicode console input and ^Z handling.
It changes the console input to use ReadConsole again,
as in Go 1.5, which seemed to work for all known Unicode input.
Then it adds explicit handling of ^Z in the input stream.
(In the case where standard input is a redirected file, ^Z processing
should not happen, and it does not, because this code path is only
invoked when standard input is the console.)

With this CL:

	C:\>go run x.go
	> hello
	[7 "hello\r\n" <nil>]
	> hello world™
	[16 "hello world™\r\n" <nil>]
	> ^Z
	[0 "" EOF]
	> [2 "\r\n" <nil>]
	> hello^Zworld
	[5 "hello" <nil>]
	> [0 "" EOF]
	> [7 "world\r\n" <nil>]

This almost matches Unix:

	$ go run /tmp/x.go
	> hello
	[6 "hello\n" <nil>]
	> hello world™
	[15 "hello world™\n" <nil>]
	> ^D
	[0 "" EOF]
	> [1 "\n" <nil>]
	> hello^Dworld
	[5 "hello" <nil>]
	> [6 "world\n" <nil>]
	>

The difference is in the handling of hello^Dworld / hello^Zworld.
On Unix, hello^Dworld terminates the read of hello but does not
result in a zero-length read between reading hello and world.
This is dictated by the tty driver, not any special Go code.

On Windows, in this CL, hello^Zworld inserts a zero length read
result between hello and world, which is treated as an interior EOF.
This is implemented by the Go code in this CL, but it matches the
handling of ^Z on the console in other programs:

	C:\>copy con x.txt
	hello^Zworld
	        1 file(s) copied.

	C:\>type x.txt
	hello
	C:\>

A natural question is how to test all this. As noted above, we don't
know how to write automated tests using the actual Windows console.
CL 29493 introduced the idea of substituting a different syscall.ReadFile
implementation for testing; this CL continues that idea but substituting
for syscall.ReadConsole instead. To avoid the regression of putting
ReadFile back, this CL adds a comment warning against that.

Fixes #17427.
Fixes #17939.

Change-Id: Ibaabd0ceb2d7af501d44ac66d53f64aba3944142
Reviewed-on: https://go-review.googlesource.com/33451
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: default avatarQuentin Smith <quentin@golang.org>
Reviewed-by: default avatarAlex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      610d5221
    • David Crawshaw's avatar
      os: Executable can use /proc/self/exe on android · 8a2c34e4
      David Crawshaw authored 
      Fixes the os test on the Android builder.

Change-Id: Ibb9db712156a620fcccf515e035475c5e2f535a5
Reviewed-on: https://go-review.googlesource.com/33650
Run-TryBot: David Crawshaw <crawshaw@golang.org>
Reviewed-by: default avatarBrad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
      8a2c34e4
  3. 28 Nov, 2016 6 commits
  5. 26 Nov, 2016 1 commit
  7. 25 Nov, 2016 1 commit
    • Daniel Martí's avatar
      testing: comment out flag.Parse from example · 11106492
      Daniel Martí authored 
      The TestMain docs explain that flag.Parse() should be called if TestMain
itself depends on command-line flags.

The issue here is that the example implementation does not use any
flags, and thus the flag.Parse call is unnecessary. This leads to people
who use this example as a starting point for their own implementations
to forget that the call is not necessary in most cases.

Comment it out instead of removing the line to keep it as a reminder, as
suggested by Minux Ma.

Change-Id: I6ffc5413e7036366ae3cf0f069b7065e832a3b45
Reviewed-on: https://go-review.googlesource.com/33273Reviewed-by: default avatarMinux Ma <minux@golang.org>
Reviewed-by: default avatarIan Lance Taylor <iant@golang.org>
      11106492
  9. 24 Nov, 2016 3 commits
  11. 23 Nov, 2016 8 commits
  13. 22 Nov, 2016 7 commits
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