4 KB is a bit too small in some situations (e.g. panic during a
template execution), and ends up with an unhelpfully-truncated trace.
64 KB should be much more likely to capture the useful information.
There's not a garbage generation issue, since this code should only
be triggered when there's something seriously wrong with the program.

LGTM=bradfitz
R=bradfitz
CC=golang-codereviews
https://golang.org/cl/63520043

Fixes #6850.

LGTM=agl
R=golang-codereviews, agl
CC=golang-codereviews
https://golang.org/cl/60500046

for example, we now rewrite *_Ctype_int to *C.int.
Fixes #6781.

LGTM=iant
R=golang-codereviews, rsc, iant
CC=golang-codereviews
https://golang.org/cl/36860043

Missed this suggestion in CL 57680046.

LGTM=iant
R=iant
CC=golang-codereviews
https://golang.org/cl/63390043

In file included from src/lib9/utf/utfecpy.c:17:0:
src/lib9/utf/utfdef.h:28:0: error: "nil" redefined [-Werror]
In file included from src/lib9/utf/utfrrune.c:17:0:
src/lib9/utf/utfdef.h:28:0: error: "nil" redefined [-Werror]

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/63410043

This change depends on CL 57170052.

LGTM=rsc
R=rsc, bradfitz
CC=golang-codereviews
https://golang.org/cl/60840049

warning: src/lib9/fmt/dorfmt.c:64 unreachable code RETURN
warning: src/lib9/fmt/fltfmt.c:184 set and not used: p
warning: src/lib9/utf/utflen.c:35 unreachable code RETURN
warning: src/lib9/utf/utfrrune.c:45 unreachable code RETURN
warning: src/lib9/utf/utfrune.c:44 unreachable code RETURN

LGTM=rsc
R=rsc, iant, gobot
CC=golang-codereviews
https://golang.org/cl/57170052

Logically, the init statement is in the enclosing scopes loopdepth, not inside the for loop.

Fixes #7313.

LGTM=rsc
R=golang-codereviews, gobot, rsc
CC=golang-codereviews
https://golang.org/cl/62430043

go/build is changed to list the .m files in a package, and match them for build constraints, adding them to a new field: Package.MFiles.

The go tool is changed to support building .m files and linking in the results during CGO and SWIG builds. This means packages that create a C interface to calls Objective-C code from go are now go-gettable without producing and distributing .syso files. This change is analogous to the one in Go 1.2 made to support C++ built code.

This change doesn't support .mm files (Objective C++).

Also added support for these MFiles to go list's -json mode.

Fixes #6536.

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/60590044

This change adds support for parsing and serialisation of PKCS #10,
certificate signature requests.

LGTM=agl
R=golang-codereviews, agl
CC=agl, golang-codereviews, nick
https://golang.org/cl/49830048

TextMarshaller and TextUnmarshaller to ease transport of
unlimited precision rational numbers.

Fixes #7287.

Consists of encode and decode functions and two test
functions, one using JSON and one using XML. Each
verifies round trips for integers (rationals with
denominator == 1) and for fractional vaues.

LGTM=gri
R=gri, cookieo9, bradfitz, mtj
CC=golang-codereviews
https://golang.org/cl/61180043

c:\src\go\pkg\obj\windows_amd64\libgc.a(lex.o): In function `catcher':
c:/src/go/src/cmd/gc/lex.c:181: undefined reference to `noted'

LGTM=0intro
R=0intro
CC=golang-codereviews
https://golang.org/cl/63270043

This cleans up the code significantly, and it avoids any
possible problems with madvise zeroing out some but
not all of the data.

Fixes #6400.

LGTM=dave
R=dvyukov, dave
CC=golang-codereviews
https://golang.org/cl/57680046

The issue was that one of the MSpan_Sweep callers
was doing sweep with preemption enabled.
Additional checks are added.

LGTM=rsc
R=rsc, dave
CC=golang-codereviews
https://golang.org/cl/62990043

LGTM=rsc
R=rsc, jas, gobot
CC=ality, golang-codereviews
https://golang.org/cl/51650051

TestLookupHost expects that no duplicate addresses are returned. when cs is consulted for a name, e.g net!localhost!1, it will possibly return multiple available paths, e.g. via il and tcp. this confuses the tests.

LGTM=aram
R=jas, 0intro, aram
CC=golang-codereviews
https://golang.org/cl/58120045

This adds support for archives with the SCHILY.xattr field in the
pax header. This is what gnu tar and star generate.
Fixes #7154.

LGTM=dsymonds
R=golang-codereviews, gobot, dsymonds
CC=golang-codereviews
https://golang.org/cl/54570043

While we're at it, fix a wrong for statement in cmd/8g.

LGTM=rsc
R=rsc, golang-codereviews
CC=golang-codereviews
https://golang.org/cl/62700044

warning: src/cmd/gc/popt.c:700 format mismatch d VLONG, arg 4
warning: src/cmd/gc/popt.c:700 format mismatch d VLONG, arg 5

LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/62910043

TBR=dvyukov
CC=golang-codereviews
https://golang.org/cl/62960043

This seems to be what causes the 'chunk mismatch' errors.
I don't know why the server tells us there's nothing to upload,
but at the least we can warn that it did, so that the user
will try again.

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/62840043

Generated by addca.

R=gobot
CC=golang-codereviews
https://golang.org/cl/62890043

Generated by addca.

R=gobot
CC=golang-codereviews
https://golang.org/cl/62880043

Generated by addca.

R=gobot
CC=golang-codereviews
https://golang.org/cl/62870043

Generated by addca.

R=gobot
CC=golang-codereviews
https://golang.org/cl/62860043

copyau1 was assuming that it could deduce the type of the
middle register p->reg from the type of the left or right
argument: in CMPF F1, F2, the p->reg==2 must be a D_FREG
because p->from is F1, and in CMP R1, R2, the p->reg==2 must
be a D_REG because p->from is R1.

This heuristic fails for CMP $0, R2, which was causing copyau1
not to recognize p->reg==2 as a reference to R2, which was
keeping it from properly renaming the register use when
substituting registers.

cmd/5c has the right approach: look at the opcode p->as to
decide the kind of register. It is unclear where 5g's copyau1
came from; perhaps it was an attempt to avoid expanding 5c's
a2type to include new instructions used only by 5g.

Copy a2type from cmd/5c, expand to include additional instructions,
and make it crash the compiler if asked about an instruction
it does not understand (avoid silent bugs in the future if new
instructions are added).

Should fix current arm build breakage.

While we're here, fix the print statements dumping the pred and
succ info in the asm listing to pass an int arg to %.4ud
(Prog.pc is a vlong now, due to the liblink merge).

TBR=ken2
CC=golang-codereviews
https://golang.org/cl/62730043

Fixes #7294.

LGTM=minux.ma, dave, bradfitz
R=golang-codereviews, minux.ma, dave, bradfitz
CC=golang-codereviews
https://golang.org/cl/61370043

New testdata was created from existing using:
$ lipo gcc-386-darwin-exec gcc-amd64-darwin-exec -create -output fat-gcc-386-amd64-darwin-exec

Fixes #7250.

LGTM=dave
R=golang-codereviews, dave, josharian, bradfitz
CC=golang-codereviews
https://golang.org/cl/60190043

From the description of CL 60190043

debug/macho: Add support for opening fat/universal binaries.

New testdata was created from existing using:
$ lipo gcc-386-darwin-exec gcc-amd64-darwin-exec -create -output
fat-gcc-386-amd64-darwin-exec

Update #7250

LGTM=iant
R=golang-codereviews, gobot, dsymonds, iant
CC=golang-codereviews
https://golang.org/cl/61720044

So it doesn't bitrot.

Like the sha1 version (https://golang.org/cl/62270043)

LGTM=agl
R=agl
CC=golang-codereviews
https://golang.org/cl/62420043

State of the world:

CL 46430043 introduced a new concurrent sweep but is broken.

CL 62360043 made the new sweep non-concurrent
to try to fix the world while we understand what's wrong with
the concurrent version.

This CL fixes the non-concurrent form to run finalizers.
This CL is just a band-aid to get the build green again.

Dmitriy is working on understanding and then fixing what's
wrong with the concurrent sweep.

TBR=dvyukov
CC=golang-codereviews
https://golang.org/cl/62370043

Generated by addca.

R=gobot
CC=golang-codereviews
https://golang.org/cl/57680047

We see failures on builders, e.g.:
http://build.golang.org/log/70bb28cd6bcf8c4f49810a011bb4337a61977bf4

LGTM=rsc, dave
R=rsc, dave
CC=golang-codereviews
https://golang.org/cl/62360043

We now use the %A, %D, %P, and %R routines from liblink
across the board.

Fixes #7178.
Fixes #7055.

LGTM=iant
R=golang-codereviews, gobot, rsc, dave, iant, remyoudompheng
CC=golang-codereviews
https://golang.org/cl/49170043

So it doesn't bitrot.

LGTM=agl
R=golang-codereviews, agl
CC=golang-codereviews
https://golang.org/cl/62270043

Better sampling of objects that are close in size to sampling rate.
See the comment for details.

LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews
https://golang.org/cl/43830043

Current "System->etext" is not very informative.
Add parent "GC" frame.
Replace un-unwindable syscall/cgo frames with Go stack that leads to the call.

LGTM=rsc
R=rsc, alex.brainman, ality
CC=golang-codereviews
https://golang.org/cl/61270043

(up to 2.8x).

This is a partially unrolled version which performs better for small
hashes and only sacrifices a small amount of ultimate speed to a fully
unrolled version which uses 5k of code.

Code size

  Before 1636 bytes
  After 1880 bytes
  15% larger

Benchmarks on Samsung Exynos 5 ARMv7 Chromebook

benchmark              old ns/op    new ns/op    delta
BenchmarkHash8Bytes         1907         1136  -40.43%
BenchmarkHash1K            20280         7547  -62.79%
BenchmarkHash8K           148469        52576  -64.59%

benchmark               old MB/s     new MB/s  speedup
BenchmarkHash8Bytes         4.19         7.04    1.68x
BenchmarkHash1K            50.49       135.68    2.69x
BenchmarkHash8K            55.18       155.81    2.82x

LGTM=dave, agl
R=dave, bradfitz, agl, adg, nick
CC=golang-codereviews
https://golang.org/cl/56990044

Remove GOOS_solaris ifdef from netpoll code,
instead introduce runtime edge/level triggered IO flag.
Replace armread/armwrite with a single arm(mode) function,
that's how all other interfaces look like and these functions
will need to do roughly the same thing anyway.

LGTM=rsc
R=golang-codereviews, dave, rsc
CC=golang-codereviews
https://golang.org/cl/55500044

1. Make internal chan functions static.
2. Move selgen local variable instead of a member of G struct.
3. Change "bool *pres/selected" parameter of chansend/chanrecv to "bool block",
   which is simpler, faster and less code.
-37 lines total.

LGTM=rsc
R=golang-codereviews, dave, gobot, rsc
CC=bradfitz, golang-codereviews, iant, khr
https://golang.org/cl/58610043