Fixes build from https://golang.org/cl/12152

Plan 9 lacks syscall.EPIPE. I was misled by api/go1.txt and also
forgot to use the trybots. :(

Change-Id: I4982fe969ad4a8724090cb03009bfb21780d8aa7
Reviewed-on: https://go-review.googlesource.com/12153
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Add tests for isSecure function.

Change-Id: I49de9d2846b75d4c7be745484f85d351a6fd851d
Reviewed-on: https://go-review.googlesource.com/11514Reviewed-by: Russ Cox <rsc@golang.org>

Fixes #11656 (again).

Change-Id: I170ff10bfbdb0f34e57c11de42b6ee5291837813
Reviewed-on: https://go-review.googlesource.com/12142Reviewed-by: Russ Cox <rsc@golang.org>

Fixes #9173

Change-Id: I83530533db84b07cb88dbf6ec690be48a06a9d7d
Reviewed-on: https://go-review.googlesource.com/12152Reviewed-by: Ian Lance Taylor <iant@golang.org>

Still to do: ARM64 and PPC64. These architectures are woefully underdocumented.

Change-Id: Iedcf767a7e0e1c931812351940bc08f0c3821212
Reviewed-on: https://go-review.googlesource.com/12110Reviewed-by: Russ Cox <rsc@golang.org>

The old numerical names like 6.out.go are a relic from the old tools.
Easier to rename than explain.

The anames.go files were modified by go generate; no changes
beyond the explanatory comment at the top.

Change-Id: I84742c75c60e47724baa9d49a91fef1f8581f021
Reviewed-on: https://go-review.googlesource.com/12069
Run-TryBot: Rob Pike <r@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

These memstats are currently being computed by gcMark, which was
appropriate in Go 1.4, but gcMark is now just one part of a bigger
picture. In particular, it can't account for the sweep termination
pause time, it can't account for all of the mark termination pause
time, and the reported "pause end" and "last GC" times will be
slightly earlier than they really are.

Lift computing of these statistics into func gc, which has the
appropriate visibility into the process to compute them correctly.

Fixes one of the issues in #10323. This does not add new statistics
appropriate to the concurrent collector; it simply fixes existing
statistics that are being misreported.

Change-Id: I670cb16594a8641f6b27acf4472db15b6e8e086e
Reviewed-on: https://go-review.googlesource.com/11794Reviewed-by: Russ Cox <rsc@golang.org>

Currently we report MemStats.PauseEnd in nanoseconds, but with no
particular 0 time. On Linux, the 0 time is when the host started. On
Darwin, it's the UNIX epoch. This is also inconsistent with the other
absolute time in MemStats, LastGC, which is always reported in
nanoseconds since 1970.

Fix PauseEnd so it's always reported in nanoseconds since 1970, like
LastGC.

Fixes one of the issues raised in #10323.

Change-Id: Ie2fe3169d45113992363a03b764f4e6c47e5c6a8
Reviewed-on: https://go-review.googlesource.com/11801
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>

Fixes #11656.

Change-Id: Ib81d583e4b004e67dc9d2f898fd798112434e7a9
Reviewed-on: https://go-review.googlesource.com/12026Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>

Fixes race detector build.

Change-Id: I8bdc78d57487580e6b5b8c415df4653a1ba69e37
Reviewed-on: https://go-review.googlesource.com/12087Reviewed-by: Austin Clements <austin@google.com>

This change does clean up as preparation for fixing #11081.

- renames cfg to resolvConf for clarification
- adds a new type resolverConfig and its methods: init, update,
  tryAcquireSema, releaseSema for mutual exclusion of resolv.conf data
- deflakes, simplifies tests for resolv.conf data; previously the tests
  sometimes left some garbage in the data

Change-Id: I277ced853fddc3791dde40ab54dbd5c78114b78c
Reviewed-on: https://go-review.googlesource.com/10931Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #11307.
Fixes #11055.

Change-Id: I8d6b04cb509e62e27d6935b91ffe35fdaea4ebcd
Reviewed-on: https://go-review.googlesource.com/12028Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>

Missed select case when adding the barrier last time.
All the more reason to refactor this code in Go 1.6.

Fixes #11643.

Change-Id: Ib0d19d6e0939296c0a3e06dda5e9b76f813bbc7e
Reviewed-on: https://go-review.googlesource.com/12086Reviewed-by: Austin Clements <austin@google.com>

This is a copy of an upstream change to the tools repo:
https://go-review.googlesource.com/#/c/8924/

This is a second attempt at CL 8954, with the necessary change to
go/build's deps test.

Change-Id: Ib798498cf85fea0baec5667e9324d11f6ae8ad64
Reviewed-on: https://go-review.googlesource.com/9173Reviewed-by: Robert Griesemer <gri@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

Fixes #11604

The gray-gradient.png image was created by a Go program:

----
package main

import (
	"image"
	"image/color"
	"image/png"
	"log"
	"os"
)

func main() {
	f, err := os.Create("a.png")
	if err != nil {
		log.Fatal(err)
	}
	defer f.Close()
	m := image.NewGray(image.Rect(0, 0, 1, 16))
	for i := 0; i < 16; i++ {
		m.SetGray(0, i, color.Gray{uint8(i * 0x11)})
	}
	err = png.Encode(f, m)
	if err != nil {
		log.Fatal(err)
	}
}
----

The equivalent gray-gradient.interlaced.png image was created via ImageMagick:
$ convert -interlace PNG gray-gradient.png gray-gradient.interlaced.png

As a sanity check:
$ file gray-gradient.*
gray-gradient.interlaced.png: PNG image data, 1 x 16, 4-bit grayscale, interlaced
gray-gradient.png:            PNG image data, 1 x 16, 8-bit grayscale, non-interlaced

Change-Id: I7700284f74d1ea30073aede3bce4d7651787bdbc
Reviewed-on: https://go-review.googlesource.com/12064Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This is clearly what was intended all along. ./all.bash passes with this
change.

Change-Id: I16996da11cf1e4d2dc2a4434b7611a724691e8dc
Reviewed-on: https://go-review.googlesource.com/12068Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #10246

Change-Id: Ifa698232a09e1c37f3a9340ffdc1f2650c06fe4c
Reviewed-on: https://go-review.googlesource.com/11900Reviewed-by: Rob Pike <r@golang.org>

Fixes #11662.

Change-Id: I8839b48a1cd3da4c29b6def03cb0c74c1c12942e
Reviewed-on: https://go-review.googlesource.com/12066Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #11273.

Change-Id: I409b6c4168711913076439036d65e8639ca3b06f
Reviewed-on: https://go-review.googlesource.com/12073Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Update #11654

Change-Id: Ia199b8dd349542ad8b92b463dd2f3734dd7e66a4
Reviewed-on: https://go-review.googlesource.com/12060
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

The previous commit (git 2ae77376) just did golang.org.  This one
includes golang.org subdomains like blog, play, and build.

Change-Id: I4469f7b307ae2a12ea89323422044e604c5133ae
Reviewed-on: https://go-review.googlesource.com/12071Reviewed-by: Rob Pike <r@golang.org>

Adds the clarification that these functions return empty
string if the requested element is not available

Added fullstops

Fixes #11664

Change-Id: I84173862bc785240f7d3ee75a5023673264d172b
Reviewed-on: https://go-review.googlesource.com/12061Reviewed-by: Rob Pike <r@golang.org>

The one in misc/makerelease/makerelease.go is particularly bad and
probably warrants rotating our keys.

I didn't update old weekly notes, and reverted some changes involving
test code for now, since we're late in the Go 1.5 freeze. Otherwise,
the rest are all auto-generated changes, and all manually reviewed.

Change-Id: Ia2753576ab5d64826a167d259f48a2f50508792d
Reviewed-on: https://go-review.googlesource.com/12048Reviewed-by: Rob Pike <r@golang.org>

Fixes #11552

Change-Id: I87904e9e3fb4bd1fb4c7075a4e2d0151e5bd37df
Reviewed-on: https://go-review.googlesource.com/11890
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Mikio Hara <mikioh.mikioh@gmail.com>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

The default behaviour for fatal errors and runtime panics is to dump
the goroutine stack traces and exit with code 2. However, when the process is
owned by foreign code, it is suprising and inappropriate to suddenly exit
the whole process, even on fatal errors. Instead, re-use the crash behaviour
from GOTRACEBACK=crash and abort.

The motivating use case is issue #11382, where an Android crash reporter
is confused by an exiting process, but I believe the aborting behaviour
is appropriate for all cases where Go does not own the process.

The change is simple and contained and will enable reliable crash reporting
for Android apps in Go 1.5, but I'll leave it to others to judge whether it
is too late for Go 1.5.

Fixes #11382

Change-Id: I477328e1092f483591c99da1fbb8bc4411911785
Reviewed-on: https://go-review.googlesource.com/12032Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Recent change (CL 10370) unexpectedly broke TestRaiseException on
Windows XP amd64. I still do not know why. But reverting old
CL 8165 fixes the problem.

This effectively makes Windows XP amd64 use AddVectoredContinueHandler
instead of SetUnhandledExceptionFilter for exception handling. That is
what we do for all recent Windows versions too.

Fixes #11481

Change-Id: If2e8037711f05bf97e3c69f5a8d86af67c58f6fc
Reviewed-on: https://go-review.googlesource.com/11888
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Daniel Theophanes <kardianos@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Fixes #11442

Change-Id: I2053fe752c6a122924d28565f1338f73e00ed417
Reviewed-on: https://go-review.googlesource.com/11791Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Instead of silently truncating integers to their expected range, check
that they're within range and emit errors if not.  Intended to help
narrow down the cause of issue #11617.

Change-Id: Ia7b577270f8438ca7479262702371e26277f1ea7
Reviewed-on: https://go-review.googlesource.com/12050Reviewed-by: Ian Lance Taylor <iant@golang.org>

When GOROOT_FINAL is set when running all.bash, the tests are run
before the files are copied to GOROOT_FINAL.  The tests are run with
GOROOT set, so most work fine.  This fixes two cases that do not.

In cmd/go/go_test.go we were explicitly removing GOROOT from the
environment, causing tests that did not themselves explicitly set
GOROOT to fail.  There was no need to explicitly remove GOROOT, so
don't do it.  If people choose to run "go test cmd/go" with a bad
GOROOT, that is their own lookout.

In the runtime GDB test, the linker has told gdb to find the support
script in GOROOT_FINAL, which will fail.  Check for that case, and
skip the test when we see it.

Fixes #11652.

Change-Id: I4d3a32311e3973c30fd8a79551aaeab6789d0451
Reviewed-on: https://go-review.googlesource.com/12021
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Update #11609.

Change-Id: Ie363facf13f5e62f1af4a8bdc42a18fb36e16ebf
Reviewed-on: https://go-review.googlesource.com/12022Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Don't treat IPv4-mapped link-local IP addresses as IPv6 link-local
addresses, an IPv4 broadcast address as a global unicast IP address.

Fixes #11585.

Change-Id: I6a7a0c0601f18638f5c624ab63e12ee40f77b182
Reviewed-on: https://go-review.googlesource.com/11883Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Updates #6465.

Change-Id: I5babbcf4c92dae47c823a41628b01e4ceb2332eb
Reviewed-on: https://go-review.googlesource.com/11951
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

People use 80-column terminals because their grandparents used
punched cards. When I last used a punched card, in 1978, it seemed
antiquated even then. But today, people still set their terminal
widths to 80 to honor the struggles their fallen ancestors made to
endure this painful technology.

We must all stand and salute the 80 column flag, or risk the opprobium
of our peers.

For Pete's sake, I don't even use a fixed-width font. I don't even
believe in columns.

Fixes #11639 with extreme reluctance.

P.S. To avoid the horror of an automatically folded line of text, this commit message has been formatted to fit on an 80-column line, except for this postscript.

Change-Id: Ia2eb2dcf293dabe804c22ee5abb4bbb703f45c33
Reviewed-on: https://go-review.googlesource.com/12011Reviewed-by: Ian Lance Taylor <iant@golang.org>

Section.Data returns disk section data, but those are rounded up to
some predefined value. Processing these as is confuses dwarf parser
because of garbage at the end. Truncate Section.Data as per memory
section description.

Sometimes dwarf sections have memory section size of 0
(for pe object files). Keep those to their disk size.

Fixes #11608

Change-Id: I8de0a2271201a24aa9ac8dac44f1e9c8a9285183
Reviewed-on: https://go-review.googlesource.com/11950Reviewed-by: Ian Lance Taylor <iant@golang.org>

GODEBUG=netdns=1 prints a one-time strategy decision. (cgo or go DNS lookups)
GODEBUG=netdns=2 prints the per-lookup strategy as a function of the hostname.

The new "netcgo" build tag forces cgo DNS lookups.

GODEBUG=netdns=go (or existing build tag "netgo") forces Go DNS resolution.
GODEBUG=netdns=cgo (or new build tag "netcgo") forces libc DNS resolution.

Options can be combined with e.g. GODEBUG=netdns=go+1 or GODEBUG=netdns=2+cgo.

Fixes #11322
Fixes #11450

Change-Id: I7a67e9f759fd0a02320e7803f9ded1638b19e861
Reviewed-on: https://go-review.googlesource.com/11584Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: Ide5b0c81405fbf6b83a6f02527d629898e0fcf02
Reviewed-on: https://go-review.googlesource.com/12000Reviewed-by: Ian Lance Taylor <iant@golang.org>

sysmon triggers a GC if there has been no GC for two minutes.
Currently, this is a STW GC. There is no reason for this to be STW, so
make it concurrent.

Fixes #10261.

Change-Id: I92f3ac37272d5c2a31480ff1fa897ebad08775a9
Reviewed-on: https://go-review.googlesource.com/11955Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

The architecture-specific details will be updated and expanded in
a subsequent CL (or series thereof).

Update #10096

Change-Id: I59c6be1fcc123fe8626ce2130e6ffe71152c87af
Reviewed-on: https://go-review.googlesource.com/11954Reviewed-by: Russ Cox <rsc@golang.org>

Fix typo.

TBR=rsc

Change-Id: I85d1b46744a9a4524e7949e452cdebb53afe0740
Reviewed-on: https://go-review.googlesource.com/11959Reviewed-by: Rob Pike <r@golang.org>

Change-Id: Ie3d603a95826b9b6a7acd4825991f24c3c61408b
Reviewed-on: https://go-review.googlesource.com/11956Reviewed-by: Russ Cox <rsc@golang.org>