Change-Id: I22216df83898e560cfe6d97344f05e3678c2db99
Reviewed-on: https://go-review.googlesource.com/16872Reviewed-by: Michael Matloob <matloob@golang.org>

Somehow these were left out of the orignial CL.

Updates #11647

Change-Id: I058a30eaa25fbb72d60e7fb6bc9ff0a3b54fdb2a
Reviewed-on: https://go-review.googlesource.com/16870Reviewed-by: Minux Ma <minux@golang.org>

Calling flag.Parse twice can be problematic if other goroutines called
flag.Parsed in between: the race detector complains due to the
write after read from a different goroutine.

This can happen if TestMain calls flag.Parse and launches goroutines
that call flag.Parsed, for example if it initializes a server which
checks flags.

This patch makes testing.M.Run only parse the flags if they have not
been parsed already.

Change-Id: Id9f8c31c5f90614e3f34c63d1a32cf7e9055d68e
Reviewed-on: https://go-review.googlesource.com/16739Reviewed-by: Russ Cox <rsc@golang.org>

The heap profile is only guaranteed to be up-to-date after two GC
cycles, so force two GCs instead of just one.

Updates #13098.

Change-Id: I4fb9287b698f4a3b90b8af9fc6a2efb3b082bfe5
Reviewed-on: https://go-review.googlesource.com/16848Reviewed-by: Dmitry Vyukov <dvyukov@google.com>

I made a copy of the per-arch _CacheLineSize definitons when checking in
runtime/internal/atomic. Now that runtime/internal/sys is checked in,
we can use the definition there.

Change-Id: I7242f6b633e4164f033b67ff471416b9d71c64d2
Reviewed-on: https://go-review.googlesource.com/16847Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

sigprof tracebacks the stack across systemstack switches to make
profile tracebacks more complete. However, it does this even if the
user stack is currently being copied, which means it may be in an
inconsistent state that will cause the traceback to panic.

One specific way this can happen is during stack shrinking. Some
goroutine blocks for STW, then enters gchelper, which then assists
with root marking. If that root marking happens to pick the original
goroutine and its stack needs to be shrunk, it will begin to copy that
stack. During this copy, the stack is generally inconsistent and, in
particular, the actual locations of the stack barriers and their
recorded locations are temporarily out of sync. If a SIGPROF happens
during this inconsistency, it will walk the stack all the way back to
the blocked goroutine and panic when it fails to unwind the stack
barriers.

Fix this by disallowing jumping to the user stack during SIGPROF if
that user stack is in the process of being copied.

Fixes #12932.

Change-Id: I9ef694c2c01e3653e292ce22612418dd3daff1b4
Reviewed-on: https://go-review.googlesource.com/16819Reviewed-by: Daniel Morsing <daniel.morsing@gmail.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This reverts commit bc1f9d20.

The current go-get strategy doesn't support cases that servers
cannot handle shallow clients.

Also, `go get -u` is broken and is not compatible with already
go-getted unshallow repos.

Fixes #13213.
Fixes #13206.

Change-Id: Ie89d7603d96d323db64ad82997793fda0972f709
Reviewed-on: https://go-review.googlesource.com/16832Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

The file was automatically placed in the cl by a tool I had built.
Since the compiler doesn't hook into the atomic package, it's unnecessary.

Change-Id: I631fd876813b381bb12604865b00fc5b268dce84
Reviewed-on: https://go-review.googlesource.com/16844Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

I keep losing this utility, used as part of other tools to auto-update
the AUTHORS and CONTRIBUTORS files.  Check it in to the repo so I
don't lose it, and so others can use it as well.

Updates #12042

Change-Id: Ib5886b85799087aaaddcec4c81169e2726322c05
Reviewed-on: https://go-review.googlesource.com/16824Reviewed-by: Russ Cox <rsc@golang.org>

Fixes #13214.

Change-Id: Id8fbb252b8beadb0b41f839dcd85d6165dea86a3
Reviewed-on: https://go-review.googlesource.com/16845Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

runtime/internal/sys will hold system-, architecture- and config-
specific constants.

Updates #11647

Change-Id: I6db29c312556087a42e8d2bdd9af40d157c56b54
Reviewed-on: https://go-review.googlesource.com/16817Reviewed-by: Russ Cox <rsc@golang.org>

The heapsampling.go test occasionally fails on some architectures
because it finds zero heap samples in main.alloc. This happens because
the byte and object counts are only updated at a GC. Hence, if a GC
happens part way through allocInterleaved, but then doesn't happen
after we start calling main.alloc, checkAllocations will see buckets
for the lines in main.alloc (which are created eagerly), but the
object and byte counts will be zero.

Fix this by forcing a GC to update the profile before we collect it.

Fixes #13098.

Change-Id: Ia7a9918eea6399307f10499dd7abefd4f6d13cf6
Reviewed-on: https://go-review.googlesource.com/16846
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>

Correct an error in the last change: it caused runtime/cgo and
runtime/race to not depend on runtime.

Fixes #13214.

Change-Id: Ib48b3b5e9a74567ddfaccb7ab4a897ee2aedc2b8
Reviewed-on: https://go-review.googlesource.com/16837Reviewed-by: Michael Matloob <matloob@golang.org>

Explictly list the alternative formats in each file.  In AUTHORS, refer
to CONTRIBUTORS' definition of multiple email addresses.  Indent with
four spaces;  AUTHORS used a tab, but CONTRIBUTORS used four spaces.
s/Rietveld/Gerrit/

Change the tab separating Sebastien Binet from his email address,
added in 2010's 18b02f6c.

Change-Id: Id52228ae6b62dd88ad8098110c22373bf14e068f
Reviewed-on: https://go-review.googlesource.com/16826Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

lfstack.go:19: println call ends with newline

Change-Id: I2a903eef80a5300e9014999c2f0bc5d40ed5c735
Reviewed-on: https://go-review.googlesource.com/16836
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>

cgo_ppc64x.go:7: +build comment must appear before package clause and be followed by a blank line

Change-Id: Ib6dedddae70cc75dc3f137eb37ea338a64f8b595
Reviewed-on: https://go-review.googlesource.com/16835
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Andrew Gerrand <adg@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: I9161c4a7e747d35ad7643b8cf0fe8b66eaea963b
Reviewed-on: https://go-review.googlesource.com/16842Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: I22ea3352ad0794fc611334c2f2ec5f1e894985ce
Reviewed-on: https://go-review.googlesource.com/14460Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>

Skip fixedbugs/issue10607.go because external linking is not supported
yet.

Skip nilptr3.go because of issue #9058 (same as ppc64).

Change-Id: Ib3dfbd9a03ee4052871cf57c74b3cc5e745e1f80
Reviewed-on: https://go-review.googlesource.com/14461Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: I419f3b8bf1bddffd4a775b0cd7b98f0239fe19cb
Reviewed-on: https://go-review.googlesource.com/14458Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: Ib6f168b6a2daf3befbf75b4b95967ff91ac95d12
Reviewed-on: https://go-review.googlesource.com/14456Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

mips64 strace doesn't support sendfile64 and will error out if we
specify that with `-e trace='. So we use sendfile for mips64 here.

Change-Id: If5e2bb39866ca3a77dcc40e4db338ba486921d89
Reviewed-on: https://go-review.googlesource.com/14455Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I77c6768fff6f0163b36800307c4d573bb6521fe5
Reviewed-on: https://go-review.googlesource.com/14454Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I05352749a852095baae2f67fd71ffcf5f727538d
Reviewed-on: https://go-review.googlesource.com/14453Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: I84ced3734410d3d05f195901f44d33f4ae6036b1
Reviewed-on: https://go-review.googlesource.com/14452Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I5129a5b9dbbc57d97da723c2fc247bd28f951817
Reviewed-on: https://go-review.googlesource.com/14451Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: Ibe6c345afd4cbae7e2542a350043fbb6b81d5678
Reviewed-on: https://go-review.googlesource.com/14450Reviewed-by: Minux Ma <minux@golang.org>

Syscall getdents64 is relatively new in linux/mips64, only since kernel
version 3.10. To support older kernel, syscall getdents is used for
mips64.

Change-Id: I892b05dff7d93e7ddb0d700abd6a5e6d4084ab4c
Reviewed-on: https://go-review.googlesource.com/14449Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: I574a2b702bb3db596f890ae7b18fb4bc1fd358d5
Reviewed-on: https://go-review.googlesource.com/14448Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>

Linux/mips64 uses a different signal table. To avoid code copying,
signal table is factored out from signal_linux.go to
sigtab_linux_generic.go. And a mips64-specific version is added.

Change-Id: I842d7a7467c330bf772855fde01aecc77a42316b
Reviewed-on: https://go-review.googlesource.com/14993Reviewed-by: Ian Lance Taylor <iant@golang.org>

Linux/mips64 has a different sigset type and some different constants.
os2_linux.go is renamed to os2_linux_generic.go, and not used in mips64.
The corresponding file os2_linux_mips64x.go is added.

Change-Id: Ief83845a2779f7fe048d236d3c7da52b627ab533
Reviewed-on: https://go-review.googlesource.com/14992Reviewed-by: Minux Ma <minux@golang.org>

Linux/mips64 uses a different type of sigset. To deal with it, related
functions in os1_linux.go is refactored to os1_linux_generic.go
(used for non-mips64 architectures), and os1_linux_mips64x.go (only used
in mips64{,le}), to avoid code copying.

Change-Id: I5cadfccd86bfc4b30bf97e12607c3c614903ea4c
Reviewed-on: https://go-review.googlesource.com/14991Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I381c03d957a0dccae5f655f02e92760e5c0e9629
Reviewed-on: https://go-review.googlesource.com/14929Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>

files for unsupported architectures are deleted, as it would require
changing cmd/dist to recognize their names as build tags (probably
need a separated CL).

Change-Id: Ifd164b014867d39b4924d1b859fb84317dce4ab0
Reviewed-on: https://go-review.googlesource.com/14928Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: I14b537922b97d4bce9e0523d98a822da906348f1
Reviewed-on: https://go-review.googlesource.com/14447Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: Ia496470e48b3c5d39fb9fef99fac356dfb73a949
Reviewed-on: https://go-review.googlesource.com/14927Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: I2eaf0658771a0ff788429e2f503d116531166315
Reviewed-on: https://go-review.googlesource.com/16834Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: I9e94027ef66c88007107de2b2b75c3d7cf1352af
Reviewed-on: https://go-review.googlesource.com/14467Reviewed-by: Minux Ma <minux@golang.org>

The actual cgo is not supported for now. This is just the cgo command.

Change-Id: I25625100ee552971f47e681b7d613cba16a2132f
Reviewed-on: https://go-review.googlesource.com/14446Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>

It is based on ppc64 compiler.

Change-Id: I15a101df05f2919ba5292136957ba0009227d067
Reviewed-on: https://go-review.googlesource.com/14445Reviewed-by: Minux Ma <minux@golang.org>