This is a part of a bigger change that adds data race detection feature:
https://golang.org/cl/6456044
This change breaks circular dependency between runtime/race and syscall packages.

R=rsc
CC=golang-dev
https://golang.org/cl/6498079

The performance changes will be a few different CLs.
Start with benchmarks as a baseline.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6537043

R=rsc, dvyukov, dave
CC=golang-dev
https://golang.org/cl/6528043

Function and method calls are valid expression statements,
but calling certain built-in functions is not permitted.
Enumerate the built-ins.

Also: unsafe.Offsetof permits parenthesized selectors as
arguments.

This is simply documenting existing compiler behavior
(both gc and gccgo agree).

R=r, rsc, iant, ken
CC=golang-dev
https://golang.org/cl/6498138

R=rsc
CC=golang-dev
https://golang.org/cl/6527043

Fixes #3942.

R=golang-dev, mike.rosset, r
CC=golang-dev
https://golang.org/cl/6524043

R=r, iant, rogpeppe, bradfitz
CC=golang-dev
https://golang.org/cl/6498078

Fixes #4093.

R=golang-dev, bradfitz, r
CC=golang-dev
https://golang.org/cl/6536047

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6524045

The change is a preparation for the new scheduler.
It introduces runtime.park() function,
that will atomically unlock the mutex and park the goroutine.
It will allow to remove the racy readyonstop flag
that is difficult to implement w/o the global scheduler mutex.

R=rsc, remyoudompheng, dave
CC=golang-dev
https://golang.org/cl/6501077

Broke TCP selfConnect

««« original CL description
net: avoid nil pointer dereference when RemoteAddr.String method chain is called

Fixes #3721.

R=dave, rsc
CC=golang-dev
https://golang.org/cl/6395055
»»»

R=rsc
CC=golang-dev
https://golang.org/cl/6533043

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/6488122

During interface compare, the operands will be evaluated twice. The operands might include function calls for conversion, so make them cheap before comparing them.

R=rsc
CC=golang-dev
https://golang.org/cl/6498133

Fixes #4084.

R=r
CC=golang-dev
https://golang.org/cl/6526043

syscall: attempt to find error message in "local" language before resorting to error number on windows

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6499121

R=golang-dev
CC=golang-dev
https://golang.org/cl/6506129

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6503118

Fixes #3456.

This proposal is a reformulation of CL 5987063. This CL resets
the default GOARM value to 6 and allows the use of the VFPv3
optimisation if GOARM=7. Binaries built with this CL in place
will abort if GOARM=7 was used and the target host does not
support VFPv3.

R=minux.ma, rsc, ajstarks
CC=golang-dev
https://golang.org/cl/6501099

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/6492135

R=dave, minux.ma, rsc
CC=golang-dev
https://golang.org/cl/6501134

R=rsc, dave, minux.ma
CC=golang-dev
https://golang.org/cl/6493123

From 159 to 47.6 ns/op; slightly more accurate.

R=rsc, golang-dev, mtj, dave, remyoudompheng
CC=golang-dev
https://golang.org/cl/6500121

Fixes #4062.

R=rsc, dave, r
CC=golang-dev, nicksaika
https://golang.org/cl/6488129

In switches without an expression, the compiler would not convert the implicit true to an interface, causing codegen errors.

Fixes #3980.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6497147

Both gc and gccgo permit calls such as unsafe.Sizeof(42). The
spec only permits variable arguments. This is a (backward-compatible)
spec change reflecting the status quo. Seems preferrable over
restricting the compilers.

R=r, rsc, iant, ken
CC=golang-dev
https://golang.org/cl/6494140

I thought this was redundant since the behavior of 'go get -d' had
changed. I was wrong. Should have tested more thoroughly.

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/6500136

R=golang-dev, r
CC=adg, golang-dev
https://golang.org/cl/6493124

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6499127

Fixes #4083.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6498136

This also fixes the semantics of some corner cases with the empty
match. TODOs for genericReplacer in the tests are fixed.

benchmark                  old ns/op    new ns/op    delta
BenchmarkGenericNoMatch        71395         3132  -95.61%
BenchmarkGenericMatch1         75610        20280  -73.18%
BenchmarkGenericMatch2        837995        86725  -89.65%

R=nigeltao, rsc
CC=golang-dev
https://golang.org/cl/6492076

R=golang-dev
CC=golang-dev
https://golang.org/cl/6506121

    mainly for NetBSD/OpenBSD.

R=bradfitz, r, rsc
CC=golang-dev
https://golang.org/cl/6453154

Ref: http://svnweb.freebsd.org/base/head/sys/sys/signal.h?revision=HEAD&view=markup

R=golang-dev, devon.odell, r
CC=golang-dev
https://golang.org/cl/6490118

Give the right name for errors, and add a test to check we're
getting the errors we expect.
Also fix an ordering bug (calling add after stopParse) that
caused a nil indirection rather than a helpful error.
Fixes #3280.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/6520043

Command.Start could crash before if no fds were available
because a nil *os.File of /dev/null was added to the cleanup
list, which crashed before returning the proper error.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/6514043

Strings happen to be represented similarly to
byte slices internally, but they don't quite
behave like them: While strings can be indexed,
sliced, and have their len() taken like byte
slices, string elements are not addressable,
make() and cap() is not supported, range loops
operate differently, and they are immutable (and
thus behave like values rather then references).

Fixes #4018.

R=r, rsc, iant, ken
CC=golang-dev
https://golang.org/cl/6503116

When reading Go files, read through import block.
When reading non-Go files, read only leading comments.

R=nigeltao, adg, r
CC=golang-dev
https://golang.org/cl/6493068

TBR=r

TBR=r
CC=golang-dev
https://golang.org/cl/6496124

Nothing in exp should get installed directly in bin,
at least not by default.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6497138

instead of variables. Several reasons:
- Encourage users of the API to minimize the number of creations and reuse Collate objects.
- Don't rule out the possibility of using initialization code for collators. For some locales
  it will be possible to have very compact representations that can be quickly expanded
  into a proper table on demand.
Other changes:
- Change name of root* vars to main*, as the tables are shared between locales.
- Added Locales() method to get a list of supported locales.

R=r
CC=golang-dev
https://golang.org/cl/6498107