Fixes #5014.

R=golang-dev, r, rsc, daniel.morsing
CC=golang-dev
https://golang.org/cl/7664043

Treat the Windows net server as uninteresting for leak
purposes too.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7818048

R=r
CC=golang-dev
https://golang.org/cl/7716049

Fixes #5005

R=golang-dev, adg, fullung
CC=golang-dev
https://golang.org/cl/7777043

The rule is not concistently followed by gc.
It appears that gccgo is ignoring it. go/types
does not implement this rule. However, both
gccgo and now go/types can compile/type-check
the entire std library (and thus all the shift
expressions occuring in it) w/o errors. For
more details see the discussion in issue 4883.

Fixes #4880.
Fixes #4881.
Fixes #4883.

R=rsc, r, iant, ken, ken, mtj, rogpeppe
CC=golang-dev
https://golang.org/cl/7707043

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/7861044

Fixes #3418.

R=golang-dev, r
CC=adg, golang-dev
https://golang.org/cl/7712045

Also print all status changes when using hg -v.

The start_status_thread call was lost during the refactoring in
https://golang.org/cl/5395044/diff/6006/lib/codereview/codereview.py
Oops.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7834044

R=golang-dev, rsc, bradfitz
CC=golang-dev
https://golang.org/cl/7744047

Results from linux/arm on a Samsung Chromebook (from dfc):
localhost(~/go/src/pkg/net) % ~/go/misc/benchcmp {old,new}.txt
benchmark                           old ns/op    new ns/op    delta
BenchmarkTCP4OneShot                   568840       350526  -38.38%
BenchmarkTCP4OneShot-2                 359054       206708  -42.43%
BenchmarkTCP4OneShotTimeout            637464       363550  -42.97%
BenchmarkTCP4OneShotTimeout-2          374255       216695  -42.10%
BenchmarkTCP4Persistent                184974        64984  -64.87%
BenchmarkTCP4Persistent-2              109902        47195  -57.06%
BenchmarkTCP4PersistentTimeout         210039        64789  -69.15%
BenchmarkTCP4PersistentTimeout-2       124284        43374  -65.10%
BenchmarkTCP6OneShot                   672278       362116  -46.14%
BenchmarkTCP6OneShot-2                 383631       216400  -43.59%
BenchmarkTCP6OneShotTimeout            680740       378306  -44.43%
BenchmarkTCP6OneShotTimeout-2          397524       230152  -42.10%
BenchmarkTCP6Persistent                172346        65292  -62.12%
BenchmarkTCP6Persistent-2              106229        42096  -60.37%
BenchmarkTCP6PersistentTimeout         161149        65138  -59.58%
BenchmarkTCP6PersistentTimeout-2       152276        44548  -70.75%

R=golang-dev, dave, bradfitz, dvyukov, rsc
CC=golang-dev
https://golang.org/cl/7820045

In addition to fixing the bug, the check is now linear instead of quadratic.

Fixes #4469.

R=ken2
CC=golang-dev
https://golang.org/cl/7773047

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7546050

R=golang-dev, rsc, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/7857044

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7716047

They are making the build die. I want to be able to see that everything else is okay.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7546049

R=golang-dev
CC=dvyukov, golang-dev, rsc
https://golang.org/cl/7845043

Thanks to jon.forums@ for the fix.

Fixes #5051.

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7813045

Fix signal handling so that Go builds on NetBSD.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7759048

It used to not mark parameters as escaping if only one of the
fields it points to leaks out of the function. This causes
problems when importing from another package.

Fixes #4964.

R=rsc, lvd, dvyukov, daniel.morsing
CC=golang-dev
https://golang.org/cl/7648045

Note: BitTarget will be removed by a forthcoming changeset.

R=golang-dev, dvyukov
CC=golang-dev, rsc
https://golang.org/cl/7837044

R=golang-dev, rsc
CC=golang-dev, nigeltao
https://golang.org/cl/7812044

This provides a way to generate core dumps when people need them.
The settings are:

        GOTRACEBACK=0  no traceback on panic, just exit
        GOTRACEBACK=1  default - traceback on panic, then exit
        GOTRACEBACK=2  traceback including runtime frames on panic, then exit
        GOTRACEBACK=crash traceback including runtime frames on panic, then crash

Fixes #3257.

R=golang-dev, devon.odell, r, daniel.morsing, ality
CC=golang-dev
https://golang.org/cl/7666044

Small change to cmd/gc to catch a "fallthrough" in the final case of a switch.

R=golang-dev, rsc, mtj
CC=golang-dev
https://golang.org/cl/7841043

R=seed, rminnich, bradfitz, r
CC=golang-dev
https://golang.org/cl/7395059

Fixes #4268.
Fixes #4491.

R=golang-dev, nightlyone, fullung, r
CC=golang-dev
https://golang.org/cl/7546048

CL 7799045 relaxed the restriction in cmd/go on ~ in GOPATH
to allow paths with ~ in the middle while continuing to
protect against the common mistake of using GOPATH='~/home'
instead of GOPATH=~/home.  Unfortunately go/build still
filters these paths out:

        $ GOPATH=/tmp/test~ing go build
        test.go:22:2: cannot find package "test" in any of:
                /usr/lib/go/test (from $GOROOT)
                ($GOPATH not set)

So relax the requirement in go/build, too.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7826043

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7842043

R=rsc
CC=golang-dev
https://golang.org/cl/7836045

NEGL does a negation of the bottom 32 bits and then zero-extends to 64 bits,
resulting in a negative 32-bit number but a positive 64-bit number.

NEGQ does a full 64-bit negation, so that the result is negative both as
a 32-bit and as a 64-bit number.

This doesn't matter for the functions that are declared to return int32.
It only matters for the ones that return int64 or void* [sic].

This will fix the current incorrect error in the OpenBSD/amd64 build.
The build will still be broken, but it won't report a bogus error.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7536046

I picked everyone who has committed a CL on behalf of someone else in recent times.

R=r, rsc
CC=golang-dev
https://golang.org/cl/7836044

The database/sql/driver docs make this promise:

   "Conn is a connection to a database. It is not used
   concurrently by multiple goroutines."

That promises exists as part of database/sql's overall
goal of making drivers relatively easy to write.

So far this promise has been kept without the use of locks by
being careful in the database/sql package, but sometimes too
careful. (cf. golang.org/issue/3857)

The CL associates a Mutex with each driver.Conn, and with the
interface value progeny thereof. (e.g. each driver.Tx,
driver.Stmt, driver.Rows, driver.Result, etc) Then whenever
those interface values are used, the Locker is locked.

This CL should be a no-op (aside from some new Lock/Unlock
pairs) and doesn't attempt to fix Issue 3857 or Issue 4459,
but should make it much easier in a subsequent CL.

Update #3857

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/7803043

R=golang-dev
CC=golang-dev
https://golang.org/cl/7719046

This time for sure.
That C file sure looked like a header file to me. :-)

R=golang-dev
CC=golang-dev
https://golang.org/cl/7830043

R=golang-dev
CC=golang-dev
https://golang.org/cl/7701046

Was missing definitions of open, read, close.

R=golang-dev
CC=golang-dev
https://golang.org/cl/7828043

R=golang-dev
CC=golang-dev
https://golang.org/cl/7826044

Fixes #4804

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7819043

Bring net/fd_linux.go back (it was deleted this morning)
because it is still needed for ARM.

Fix a few typos in the runtime reorg.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7759046

This only shows up in the duplicate symbol error message.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7486053

thread_GOOS.c becomes os_GOOS.c.

signal_GOOS_GOARCH.c becomes os_GOOS_GOARCH.c,
but with non-GOARCH-specific code moved into os_GOOS.c.

The actual arch-specific signal handler moves into signal_GOARCH.c
to avoid per-GOOS duplication.

New files signal_GOOS_GOARCH.h provide macros for
accessing fields of the very system-specific signal info structs.

Lots moving, but nothing changing.
This is a preliminarly cleanup so I can work on the signal
handling code to fix some open issues without having to
make each change 13 times.

Tested on Linux and OS X, 386 and amd64.
Will fix Plan 9, Windows, and ARM after the fact if necessary.
(Plan 9 and Windows should be fine; ARM will probably have some typos.)

Net effect: -1081 lines of code.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7565048