Fixes #6028.

R=golang-dev, bradfitz, adg, r
CC=golang-dev
https://golang.org/cl/43320043

Generated by addca.

R=gobot, nikai
CC=golang-dev
https://golang.org/cl/43620043

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/14279043

Because TestDNSThreadLimit consumes tons of file descriptors and
makes other tests flaky when CGO_ENABLE=0 or being with netgo tag.

Fixes #6580.

R=golang-dev, bradfitz, adg, minux.ma
CC=golang-dev
https://golang.org/cl/14639044

At least three Go tests rely on that (log, runtime/{pprof,debug}).

Fixes #6972.
Fixes #6974.
Fixes #6975.

R=alex.brainman, mattn.jp, rsc
CC=golang-dev
https://golang.org/cl/43150043

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/43730043

All packages now use the -pack option to the compiler.
For a pure Go package, that's enough.
For a package with additional C and assembly files, the extra
archive entries can be added directly (by concatenation)
instead of by invoking go tool pack.

These changes make it possible to rewrite cmd/pack in Go.

R=iant, r
CC=golang-dev
https://golang.org/cl/42910043

All packages now use the -pack option to the compiler.
For a pure Go package, that's enough.
For a package with additional C and assembly files, the extra
archive entries can be added directly (by concatenation)
instead of by invoking go tool pack.

These changes make it possible to rewrite cmd/pack in Go.

R=iant, r
CC=golang-dev
https://golang.org/cl/42890043

The -pack flag causes 5g, 6g, 8g to write a Go archive directly,
instead of requiring the use of 'go tool pack' to convert the .5/.6/.8
to .a format.

Writing directly avoids the copy and also avoids having the
export data stored twice in the archive (once in __.PKGDEF,
once in .5/.6/.8).

A separate CL will enable the use of this flag by cmd/go.

Other build systems that do not know about -pack will be unaffected.

The changes to cmd/ld handle a minor simplification to the format:
an unused section is removed.

R=iant, r
CC=golang-dev
https://golang.org/cl/42880043

Part of getting rid of vararg C calls.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/23310043

Rob suggested this change.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/43670044

Hash tables currently store an evacuated bit in the low bit
of the overflow pointer.  That's probably not sustainable in the
long term as GC wants correctly typed & aligned pointers.  It is
also a pain to move any of this code to Go in the current state.

This change moves the evacuated bit into the tophash entries.

Performance change is negligable.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/14412043

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/40370051

gccgo has problems using reflect.Call with functions that take and
return structs with no members.  Prior to fixing that problem there, I
thought it sensible to add some tests of this situation.

Update #6761

First contribution to Go, apologies in advance if I'm doing it wrong.

R=golang-dev, dave, minux.ma, iant, khr, bradfitz
CC=golang-dev
https://golang.org/cl/26570046

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/43670043

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/38540046

R=golang-dev, r, bradfitz
CC=golang-dev, jas
https://golang.org/cl/43610043

And document it explicitly, even though it already said
it wasn't guaranteed.

Fixes #6857

R=golang-dev, khr
CC=golang-dev
https://golang.org/cl/43580043

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/43300043

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/43600043

R=golang-dev, crawshaw
CC=golang-dev
https://golang.org/cl/37690045

os: don't ignore LStat errors in Readdir. If it's ENOENT,
on the second pass, just treat it as missing. If it's another
error, it's real.

path/filepath: use ReaddirNames instead of Readdir in Walk,
in order to obey the documented WalkFunc contract of returning
each walked item's LStat error, if any.

Fixes #6656
Fixes #6680

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/43530043

This also fixes several connection leaks.
Fixes #5718

R=bradfitz, adg
CC=alberto.garcia.hierro, golang-dev
https://golang.org/cl/14920046

They cause too much bloat in the internals as we find ourselves adding
special case code for all the cross-connections. It's better to use RGBA
and just max out the alpha. We lose a little memory but reduce the number
of special cases the encoders, decoders, and drawers need to provide.

R=golang-dev, nigeltao
CC=golang-dev
https://golang.org/cl/42910045

R=golang-dev, jas, bradfitz
CC=golang-dev
https://golang.org/cl/43420043

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/43290043

Fixes build for go_bootstrap.
Fixes #6971.

R=alex.brainman, mattn.jp, rsc
CC=golang-dev
https://golang.org/cl/43130043

R=golang-dev, alex.brainman
CC=golang-dev
https://golang.org/cl/43340043

Currently it fails as:
go tool dist: $GOROOT is not set correctly or not exported
GOROOT=c:\go
c:\go\include\u.h does not exist
Fail.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/42550044

On the Chinese Windows XP system that I'm using, GetTimeZoneInformation returns a struct containing "中国标准时间" (China Standard Time in Chinese) in both StandardName and DaylightName (which is correct, because China does not use DST). However, in registry, under key HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\China Standard Time, the key Std and Dlt contain "中国标准时间" (China Standard Time in Chinese) and "中国夏季时间" (China Summer Time in Chinese) respectively. This means that time.toEnglishName() cannot determine the abbreviation for the local timezone (CST) and causes test failures (time.Local is empty)

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/43210043

Instead of writing out 0..n and then reading it
back, just use i when it is needed.

Wikipedia calls this the "inside-out" implementation:
http://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle

This yields identical values to the previous
implementation, given the same seed. (Note that the
output from Example_rand is unchanged.)

2.8 GHz Intel Core i7, results very stable:

benchmark          old ns/op    new ns/op    delta
BenchmarkPerm3           138          136   -1.45%
BenchmarkPerm30          825          803   -2.67%

Stock Raspberry Pi, minimum improvement out of three runs:

benchmark          old ns/op    new ns/op    delta
BenchmarkPerm3          5774         5664   -1.91%
BenchmarkPerm30        32582        29381   -9.82%

R=golang-dev, dave, mtj, adg
CC=golang-dev
https://golang.org/cl/21030043

This particular test would never pass unless you had GOROOT set in your
environment. This changes makes the test use the baked-in GOROOT, as it
does with GOOS and GOARCH.

R=golang-dev, dave, iant
CC=golang-dev
https://golang.org/cl/43080043

Fixes #6841.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/43010044

It should compare a - b to 0, not b - a to 0.
Fixes #6964.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/39020044

The previous coding did not correctly check for errors from the driver's
Next() or Close(), which could mask genuine errors from the database, as
witnessed in issue #6651.

Even after this change errors from Close() will be ignored if the query
returned no rows (as Rows.Next will have closed the handle already), but it
is a lot easier for the drivers to guard against that.

Fixes #6651.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/41590043

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/41940044

Protocol keywords are case-insensitive,
but the Ndb database is case-sensitive.

Also use the generic net protocol instead
of tcp in lookupHost.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/40600047

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/42310044

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/42940043

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/42370043