This issue was fixed in CL 10900.

Change-Id: I88f107cb73c8a515f39e02506ddd2ad1e286b1fb
Reviewed-on: https://go-review.googlesource.com/10940
Run-TryBot: David du Colombier <0intro@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

When the Stat or Fstat system calls return -1,
dirstat incorrectly returns ErrShortStat.

However, the error returned by Stat or Fstat
could be different. For example, when the
file doesn't exist, they return "does not exist".

Dirstat should return the error returned by
the system call.

Fixes #10911.
Fixes #11132.

Change-Id: Icf242d203d256f12366b1e277f99b1458385104a
Reviewed-on: https://go-review.googlesource.com/10900
Run-TryBot: David du Colombier <0intro@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Process.handle was accessed without synchronization while wait() and
signal() could be called concurrently.

A first solution was to add a Mutex in Process but it was probably too
invasive given Process.handle is only used on Windows.

This version uses atomic operations to read the handle value. There is
still a race between isDone() and the value of the handle, but it only
leads to slightly incorrect error codes. The caller may get a:

  errors.New("os: process already finished")

instead of:

  syscall.EINVAL

which sounds harmless.

Fixes #9382

Change-Id: Iefcc687a1166d5961c8f27154647b9b15a0f748a
Reviewed-on: https://go-review.googlesource.com/9904Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: I8473e3f7653d5389d5fcd94862f0831049b8266e
Reviewed-on: https://go-review.googlesource.com/10809Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #11144

Change-Id: I1da0b72ef00a84c9b5751be0e72ad07d664bc98b
Reviewed-on: https://go-review.googlesource.com/10883Reviewed-by: Andrew Gerrand <adg@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>

Change-Id: I82edd9364e1b4634006f5e043202a69f383dcdbe
Reviewed-on: https://go-review.googlesource.com/10826Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Update #10254

Change-Id: I3ddd26607813ca629e3ab62abf87dc5ab453e36f
Reviewed-on: https://go-review.googlesource.com/10835Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: Ida4b98aa63e57594fa6fa0b8178106bac9b3cd19
Reviewed-on: https://go-review.googlesource.com/10837Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: I95b72b6be39fbb923b5f0743d17d7f8bd3ee3814
Reviewed-on: https://go-review.googlesource.com/10860Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I1ec2460758b19e5315be061033c1bb5ed9ead4a8
Reviewed-on: https://go-review.googlesource.com/9688Reviewed-by: Minux Ma <minux@golang.org>

This was a refactoring bug during
'go tool compile', CL 10289.

Change-Id: Ibfd333be39ec72bba331fdf352df619cc21851a9
Reviewed-on: https://go-review.googlesource.com/10849Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: I7cad3f7af2452e29b3dae3da87cbd24013f6dae6
Reviewed-on: https://go-review.googlesource.com/10850Reviewed-by: Adam Langley <agl@golang.org>

GCM is traditionally used with a 96-bit nonce, but the standard allows
for nonces of any size. Non-standard nonce sizes are required in some
protocols, so add support for them in crypto/cipher's GCM
implementation.

Change-Id: I7feca7e903eeba557dcce370412b6ffabf1207ab
Reviewed-on: https://go-review.googlesource.com/8946Reviewed-by: Adam Langley <agl@golang.org>
Run-TryBot: Adam Langley <agl@golang.org>

Reflect the process changes where AUTHORS and CONTRIBUTORS
files are updated automatically based on commit logs
and Google committers no longer need to do it manually
on the first contributors.

The documentation update will help to avoid requests to be
added from new contributors.

Change-Id: I67daae5bd21246cf79fe3724838889b929bc5e66
Reviewed-on: https://go-review.googlesource.com/10824Reviewed-by: Rob Pike <r@golang.org>

Bool codegen was generating a temp for function calls
and other complex expressions, but was not using it.

This was a refactoring bug introduced by CL 7853.
The cmp code used to do (in short):

	l, r := &n1, &n2

It was changed to:

	l, r := nl, nr

But the requisite assignments:

	nl, nr = &n1, &n2

were only introduced on one of two code paths.

Fixes #10654.

Change-Id: Ie8de0b3a333842a048d4308e02911bb10c6915ce
Reviewed-on: https://go-review.googlesource.com/10844Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: Minux Ma <minux@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Previously we enforced both that the extended key usages of a client
certificate chain allowed for client authentication, and that the
client-auth EKU was in the leaf certificate.

This change removes the latter requirement. It's still the case that the
chain must be compatible with the client-auth EKU (i.e. that a parent
certificate isn't limited to another usage, like S/MIME), but we'll now
accept a leaf certificate with no EKUs for client-auth.

While it would be nice if all client certificates were explicit in their
intended purpose, I no longer feel that this battle is worthwhile.

Fixes #11087.

Change-Id: I777e695101cbeba069b730163533e2977f4dc1fc
Reviewed-on: https://go-review.googlesource.com/10806Reviewed-by: Andrew Gerrand <adg@golang.org>
Run-TryBot: Adam Langley <agl@golang.org>

Change-Id: Icda8475a7879d49e3b8b873303eb0bed5dd5a238
Reviewed-on: https://go-review.googlesource.com/10792Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: Ia7914156e4369113dea7c17b3aa51096e25f1901
Reviewed-on: https://go-review.googlesource.com/10834Reviewed-by: Ian Lance Taylor <iant@golang.org>

After a little build coordinator change, this will get us sharding of
the race builder.

Update #11074

Change-Id: I4c55267563b6f5e213def7dd6707c837ae2106bf
Reviewed-on: https://go-review.googlesource.com/10845Reviewed-by: Andrew Gerrand <adg@golang.org>

Change-Id: If11621985c0a5a1f2133cdc974f37fd944b93e5e
Reviewed-on: https://go-review.googlesource.com/10808
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Fixes #10977.

Change-Id: I706c953c16daad48595c7fae2d82124614dfc3ad
Reviewed-on: https://go-review.googlesource.com/10780Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>

Change-Id: I358b17304f95fdd8e6c0a64fa29f185c701fe338
Reviewed-on: https://go-review.googlesource.com/10805Reviewed-by: Andrew Gerrand <adg@golang.org>

The documentation for quick.Value says that it "returns an arbitrary
value of the given type." In spite of this, nil values for pointers were
never generated, which seems more like an oversight than an intentional
choice.

The lack of nil values meant that testing recursive type like

  type Node struct {
  	Next *Node
  }

with testing/quick would lead to a stack overflow since the data
structure would never terminate.

This change may break tests that don't check for nil with pointers
returned from quick.Value. Two such instances were found in the standard
library, one of which was in the testing/quick package itself.

Fixes #8818.

Change-Id: Id390dcce649d12fbbaa801ce6f58f5defed77e60
Reviewed-on: https://go-review.googlesource.com/10821Reviewed-by: Adam Langley <agl@golang.org>
Run-TryBot: Adam Langley <agl@golang.org>

- remove TODO on non-existing fmt.Formatter type
  (type exists now)
- guard uses of imported types against nil

Change-Id: I9ae8e5a448e73c84dec1606ea9d9ed5ddeee8dc6
Reviewed-on: https://go-review.googlesource.com/10777Reviewed-by: Alan Donovan <adonovan@google.com>

Change-Id: I0512e461de1f25cb2a1cb7f23e7a77d00700667c
Reviewed-on: https://go-review.googlesource.com/10803Reviewed-by: Russ Cox <rsc@golang.org>

Add .exe to exectable name, so it can be executed on windows.
Use proper windows paths when searching vet output.
Replace Skip with Skipf.

Fixes build

Change-Id: Ife40d8f5ab9d7093ca61c50683a358d4d6a3ba34
Reviewed-on: https://go-review.googlesource.com/10742
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Patrick Mézard <patrick@mezard.eu>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Commit 1303957d was supposed to enable write barriers during the
concurrent scan phase, but it only enabled *calls* to the write
barrier during this phase. It failed to update the redundant list of
write-barrier-enabled phases in gcmarkwb_m, so it still wasn't greying
objects during the scan phase.

This commit fixes this by replacing the redundant list of phases in
gcmarkwb_m with simply checking writeBarrierEnabled. This is almost
certainly redundant with checks already done in callers, but the last
time we tried to remove these redundant checks everything got much
slower, so I'm leaving it alone for now.

Fixes #11105.

Change-Id: I00230a3cb80a008e749553a8ae901b409097e4be
Reviewed-on: https://go-review.googlesource.com/10801
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: Minux Ma <minux@golang.org>

Stack barriers assume that writes through pointers to frames above the
current frame will get write barriers, and hence these frames do not
need to be re-scanned to pick up these changes. For normal writes,
this is true. However, there are places in the runtime that use
typedmemmove to potentially write through pointers to higher frames
(such as mapassign1). Currently, typedmemmove does not execute write
barriers if the destination is on the stack. If there's a stack
barrier between the current frame and the frame being modified with
typedmemmove, and the stack barrier is not otherwise hit, it's
possible that the garbage collector will never see the updated pointer
and incorrectly reclaim the object.

Fix this by making heapBitsBulkBarrier (which lies behind typedmemmove
and its variants) detect when the destination is in the stack and
unwind stack barriers up to the point, forcing mark termination to
later rescan the effected frame and collect these pointers.

Fixes #11084. Might be related to #10240, #10541, #10941, #11023,
 #11027 and possibly others.

Change-Id: I323d6cd0f1d29fa01f8fc946f4b90e04ef210efd
Reviewed-on: https://go-review.googlesource.com/10791Reviewed-by: Russ Cox <rsc@golang.org>

Currently, write barriers are only enabled after completion of the
concurrent scan phase, as we enter the concurrent mark phase. However,
stack barriers are installed during the scan phase and assume that
write barriers will track changes to frames above the stack
barriers. Since write barriers aren't enabled until after stack
barriers are installed, we may miss modifications to the stack that
happen after installing the stack barriers and before enabling write
barriers.

Fix this by enabling write barriers during the scan phase.

This commit intentionally makes the minimal change to do this (there's
only one line of code change; the rest are comment changes). At the
very least, we should consider eliminating the ragged barrier that's
intended to synchronize the enabling of write barriers, but now just
wastes time. I've included a large comment about extensions and
alternative designs.

Change-Id: Ib20fede794e4fcb91ddf36f99bd97344d7f96421
Reviewed-on: https://go-review.googlesource.com/10795Reviewed-by: Russ Cox <rsc@golang.org>

Currently checkmarks mode fails to rescan stacks because it sees the
leftover state bits indicating that the stacks haven't changed since
the last scan. As a result, it won't detect lost marks caused by
failing to scan stacks correctly during regular garbage collection.

Fix this by marking all stacks dirty before performing the checkmark
phase.

Change-Id: I1f06882bb8b20257120a4b8e7f95bb3ffc263895
Reviewed-on: https://go-review.googlesource.com/10794Reviewed-by: Russ Cox <rsc@golang.org>

Change-Id: Ib43b21daef5d8291e03c0f0fbf56999e37e21e21
Reviewed-on: https://go-review.googlesource.com/10820Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: Ibf2879c0034250c5699e21ecea0eb76340597a2a
Reviewed-on: https://go-review.googlesource.com/10810Reviewed-by: Austin Clements <austin@google.com>

Change-Id: I283ab238b60d3a47e86296e1fbfc73ba121bef19
Reviewed-on: https://go-review.googlesource.com/10745Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I999b57ef5535c18e02cc27c9bc9f896d73126b50
Reviewed-on: https://go-review.googlesource.com/10674Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>

obj.ARET is the portable return mnemonic. ppc64.ARETURN is a legacy
alias.

This was done with
    sed -i s/ppc64\.ARETURN/obj.ARET/ cmd/compile/**/*.go
    sed -i s/ARETURN/obj.ARET/ cmd/internal/obj/ppc64/obj9.go

Change-Id: I4d8e83ff411cee764774a40ef4c7c34dcbca4e43
Reviewed-on: https://go-review.googlesource.com/10673Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>

All of the architectures except ppc64 have only "RET" for the return
mnemonic. ppc64 used to have only "RETURN", but commit cf06ea68
introduced RET as a synonym for RETURN to make ppc64 consistent with
the other architectures. However, that commit was never followed up to
make the code itself consistent by eliminating uses of RETURN.

This commit replaces all uses of RETURN in the ppc64 assembly with
RET.

This was done with
    sed -i 's/\<RETURN\>/RET/' **/*_ppc64x.s
plus one manual change to syscall/asm.s.

Change-Id: I3f6c8d2be157df8841d48de988ee43f3e3087995
Reviewed-on: https://go-review.googlesource.com/10672Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: I318c1ef75b18d4687f13499ac225dde2d053505e
Reviewed-on: https://go-review.googlesource.com/10776Reviewed-by: Rob Pike <r@golang.org>

Change-Id: I7d96ebcca5954152edb821bb41b6047a1c622949
Reviewed-on: https://go-review.googlesource.com/10731Reviewed-by: Andrew Gerrand <adg@golang.org>
Reviewed-by: Rob Pike <r@golang.org>

Port of https://go-review.googlesource.com/10773 from x/tools.

Change-Id: I6aba6a63a5448b8fcbcc7f072c627c27965dbe20
Reviewed-on: https://go-review.googlesource.com/10774Reviewed-by: Alan Donovan <adonovan@google.com>

gc should ideally consider this an error too; see golang/go#8560.

Change-Id: Ieee71c4ecaff493d7f83e15ba8c8a04ee90a4cf1
Reviewed-on: https://go-review.googlesource.com/10757Reviewed-by: Robert Griesemer <gri@golang.org>