CL 146297 ignored archive members with short names that don't have
the .o suffix, however, it also ignored .syso files as well.
This change restores the original .syso behavior and adds a test.

As the test is basically following a shell script, we make use of
the existing cmd/go/testdata/script framework. To support running
C compiler in the script, we added a `cc` command, which runs the
C compiler along with correct platform specific arguments.

Fixes #29253.

Change-Id: If8520151c4d6a74ab9fe84d34bff9a4480688815
Reviewed-on: https://go-review.googlesource.com/c/154109
Run-TryBot: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>

cmd/go/main.go sets GOCACHE explicitly, so if we don't save some
metadata about how DefaultDir arrived at its answer we will be unable
to reconstruct it later.

Fixes #29243

Change-Id: Ic8bb859ab045a29c91f6a4527e65aedabf874d53
Reviewed-on: https://go-review.googlesource.com/c/154309
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>

Change-Id: Ic098bd69fa9e3f7b2ed6c451a7a266167c0cde94
Reviewed-on: https://go-review.googlesource.com/c/154302Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>

Change-Id: Id71aad4cf6149e0ba15f7fec0b74517827c37866
Reviewed-on: https://go-review.googlesource.com/c/154303Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>

We shouldn't pollute people's flags with this debugging flag that was
never really meant to be public. It's certainly not documented.

So keep it for now, but don't register it unless it looks like it's in
use (by looking at os.Args). Kinda gross, but less gross than before.

Fixes #28619

Change-Id: I47498948a26a71ff36f9658a6d9dac73fd0a3016
Reviewed-on: https://go-review.googlesource.com/c/154217
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Bonventre <andybons@golang.org>

Updates to x/net git rev 891ebc4b82d6e74f468c533b06f983c7be918a96 for:

   http2/hpack: track the beginning of a header block
   https://go-review.googlesource.com/c/153978

Updates golang/go#29187

Change-Id: Ie2568b3f8d6aaa3f097a4ac25d3acdc794f5ff5c
Reviewed-on: https://go-review.googlesource.com/c/154118
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matt Layher <mdlayher@gmail.com>

Previously, RepoRootForImportPath trimmed certain "..." wildcards from
package patterns (even though its name suggests that the argument must
be an actual import path). It trimmed at the first path element that
was literally "..." (although wildcards in general may appear within a
larger path element), and relied on a subsequent check in
RepoRootForImportPath to catch confusing resolutions.

However, that causes 'go get' with wildcard patterns in fresh paths to
fail as of CL 154101: a wildcard pattern is not a valid import path,
and fails the path check. (The existing Test{Vendor,Go}Get* packages
in go_test.go and vendor_test.go catch the failure, but they are all
skipped when the "-short" flag is set — including in all.bash — and we
had forgotten to run them separately.)

We now trim the path before any element that contains a wildcard, and
perform the path check (and repo resolution) on only that prefix. It
is possible that the expanded path after fetching the repo will be
invalid, but a repository can contain directories that are not valid
import paths in general anyway.

Fixes #29241

Change-Id: I70fb2f7fc6603b7d339fd6c02e8cdeacfc93fc4b
Reviewed-on: https://go-review.googlesource.com/c/154108Reviewed-by: Russ Cox <rsc@golang.org>

Replaces //go:linkname by assembly functions for syscall
functions on aix/ppc64.
Since the new runtime internal ABI, this was triggering an error if
syscall.Syscall6 was called by others packages like x/sys/unix.
This commit should remove every future occurences of this problem.

Fixes #28769

Change-Id: I6a4bf77472ee1e974bdb76b27e74275e568f5a76
Reviewed-on: https://go-review.googlesource.com/c/153997
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>

Instead of testing len(slice)+numNewElements > cap(slice) use
uint(len(slice)+numNewElements) > uint(cap(slice)) to test
if a slice needs to be grown in an append operation.

This prevents a possible overflow when len(slice) is near the maximum
int value and the addition of a constant number of new elements
makes it overflow and wrap around to a negative number which is
smaller than the capacity of the slice.

Appending a slice to a slice with append(s1, s2...) already used
a uint comparison to test slice capacity and therefore was not
vulnerable to the same overflow issue.

Fixes: #29190

Change-Id: I41733895838b4f80a44f827bf900ce931d8be5ca
Reviewed-on: https://go-review.googlesource.com/c/154037
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Some of the builders cannot infer user and email from the builder hostname.

Change-Id: I27e5d011fa1471f27763b6b7fa1bf59e418b925c
Reviewed-on: https://team-review.git.corp.google.com/c/376739Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-on: https://go-review.googlesource.com/c/154107Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: I3fe44887a84586d73be01df78a9cbb002c1fc9c5
Reviewed-on: https://team-review.git.corp.google.com/c/376465Reviewed-by: Filippo Valsorda <valsorda@google.com>
Reviewed-on: https://go-review.googlesource.com/c/154106Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

That number grows quadratically with the number of intermediate
certificates in certain pathological cases (for example if they all have
the same Subject) leading to a CPU DoS. Set a fixed budget that should
fit all real world chains, given we only look at intermediates provided
by the peer.

The algorithm can be improved, but that's left for follow-up CLs:

    * the cache logic should be reviewed for correctness, as it seems to
      override the entire chain with the cached one
    * the equality check should compare Subject and public key, not the
      whole certificate
    * certificates with the right SKID but the wrong Subject should not
      be considered, and in particular should not take priority over
      certificates with the right Subject

Fixes #29233

Change-Id: Ib257c12cd5563df7723f9c81231d82b882854213
Reviewed-on: https://team-review.git.corp.google.com/c/370475Reviewed-by: Andrew Bonventre <andybons@google.com>
Reviewed-on: https://go-review.googlesource.com/c/154105Reviewed-by: Filippo Valsorda <filippo@golang.org>
Run-TryBot: Filippo Valsorda <filippo@golang.org>

This fixes a regression of #18660 with the new path checks.

Updates #29230

Change-Id: I2dd9adab999e7f810e0e746ad8b75ea9622f56e7
Reviewed-on: https://team-review.git.corp.google.com/c/370578Reviewed-by: Russ Cox <rsc@google.com>
Reviewed-on: https://go-review.googlesource.com/c/154104Reviewed-by: Bryan C. Mills <bcmills@google.com>

This should be a no-op, but produces deterministic (and more correct)
behavior if we have accidentally failed to sanitize one of the inputs.

Updates #29231

Change-Id: I1271d0ffd01a691ec8c84906c4e02d9e2be19c72
Reviewed-on: https://team-review.git.corp.google.com/c/370575Reviewed-by: Russ Cox <rsc@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-on: https://go-review.googlesource.com/c/154103Reviewed-by: Bryan C. Mills <bcmills@google.com>

Updates #29230

Change-Id: Ia32d8ec1fc0c4e242f50d8871c0ef3ce315f3c65
Reviewed-on: https://team-review.git.corp.google.com/c/370571Reviewed-by: Russ Cox <rsc@google.com>
Reviewed-on: https://go-review.googlesource.com/c/154102Reviewed-by: Bryan C. Mills <bcmills@google.com>

On some platforms, directories beginning with dot are treated as
hidden files, and filenames containing unusual characters can be
confusing for users to manipulate (and delete).

Fixes #29230
Fixes #29231

Change-Id: Ic6f97f577d8fafa83ef62438095a5c7ae022881a
Reviewed-on: https://team-review.git.corp.google.com/c/368507Reviewed-by: Russ Cox <rsc@google.com>
Reviewed-on: https://go-review.googlesource.com/c/154101Reviewed-by: Bryan C. Mills <bcmills@google.com>

To fix #5043, we added logic to allow balanced pairs of parenthesis
so that we could match URLs like:
	http://example.com/some_resource(foo)

Howewer, such logic breaks when parsing something like the following:
	art by [https://example.com/person][Person Name]].
such that the following is considered the link:
	https://example.com/person][Person

Since the logic added in #5043 was just a heuristic, we adjust
the heuristic that in addition to requiring balanced pairs,
the first parenthesis must be an opening one.

For further robustness, we apply this heuristic to
parenthesis, braces, and brackets.

Fixes #22285

Change-Id: I23b728a644e35ce3995b05a79129cad2c1e3b1ce
Reviewed-on: https://go-review.googlesource.com/c/94876
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>

Fixes #26532

Change-Id: Ic086c90503c7b24982f947c828c7ccf016ddbf69
Reviewed-on: https://go-review.googlesource.com/c/154120
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #26053

Change-Id: Ic2052b1d0d4e0826a217a520c83d7bb0995ea72a
GitHub-Last-Rev: 5a3eea3dd22b0a194591ce2294b88cb340df1e8d
GitHub-Pull-Request: golang/go#26054
Reviewed-on: https://go-review.googlesource.com/c/120835Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>

Fixes #25707

Change-Id: Idfa379db8cc0e105ea68455ec0b4a0dbc1b3f485
Reviewed-on: https://go-review.googlesource.com/c/153827
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

The s390x implementations for Sin/Cos/SinCos/Tan use assembly
routines which don't reduce arguments accurately enough for
huge inputs.

Fixes #29221.

Change-Id: I340f576899d67bb52a553c3ab22e6464172c936d
Reviewed-on: https://go-review.googlesource.com/c/154119
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

chown is not implemented on js: see https://build.golang.org/log/43d7b12602660b786a6e080e685165193df0de00.

Change-Id: I3f461338825bb670d682c3f47b17ee1638343fc8
Reviewed-on: https://go-review.googlesource.com/c/154097
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Avoid running the test for issue 29198 if the available copy of gccgo
is too old (needs to support context package). Fixes a failure on the
solaris builder.

Updates #29198.

Change-Id: I2b1b3438f4ac105432f30078fbef78e24f2077cd
Reviewed-on: https://go-review.googlesource.com/c/153831
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

The previous comment mis-stated the number of bits in mPi4.
The correct value is 19*64 + 1 == 1217 bits.

Change-Id: Ife971ff6936ce2d5b81ce663ce48044749d592a0
Reviewed-on: https://go-review.googlesource.com/c/154017Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

To x/sys git rev 4d1cda033e0619309c606fc686de3adcf599539e

Fixes #29224

Change-Id: I696c815b4c2d26e8340c77cb77d1a37245c40ed2
Reviewed-on: https://go-review.googlesource.com/c/154117
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Updates #28711

Change-Id: I03139a394fdf0540db07d6d1e38b3fa223b06d58
Reviewed-on: https://go-review.googlesource.com/c/154059Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I36cc0b68a5a47ac78982b05118c58723c9c6648c
GitHub-Last-Rev: 0704d9569407d8b84d1ddcf845b759f7daa91ec1
GitHub-Pull-Request: golang/go#29203
Reviewed-on: https://go-review.googlesource.com/c/153842
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I30686cbeda34f42d5b1848b884588a76a9fb28b9
Reviewed-on: https://go-review.googlesource.com/c/152741Reviewed-by: Andrew Bonventre <andybons@golang.org>

We expect major version v1 to not have a /v1 suffix.
(Such a suffix on the package path is fine, but not on the module path.)

Fixes #26375

Change-Id: I4206ded82ede36440cedfaf39875c38b9c95dc27
Reviewed-on: https://go-review.googlesource.com/c/153823
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>

The name "Callback" does not fit to all use cases of js.Callback.
This commit changes its name to Func. Accordingly NewCallback
gets renamed to FuncOf, which matches ValueOf and TypedArrayOf.

The package syscall/js is currently exempt from Go's compatibility
promise and js.Callback is already affected by a breaking change in
this release cycle. See #28711 for details.

Fixes #28711

Change-Id: I2c380970c3822bed6a3893909672c15d0cbe9da3
Reviewed-on: https://go-review.googlesource.com/c/153559
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Update sigcontext and siginfo structs to match those currently in use by OpenBSD armv7.

Also correct the offset of the fault address field in the siginfo struct, which moved
due to the switch to EABI.

Change-Id: Icdd95222346239fcc04b95ae0fcefae09b7aa044
Reviewed-on: https://go-review.googlesource.com/c/154077Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I5112be3b0f80ef1d9dad234b1f233e598465a409
Reviewed-on: https://go-review.googlesource.com/c/153824Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The getdirentries syscall is considered private API on iOS and is
rejected by the App Store submission checks. Replace it with the
fdopendir/readdir_r/closedir syscalls.

Fixes #28984

Change-Id: I73341b124310e9cb34834a95f946769f337ec5b7
Reviewed-on: https://go-review.googlesource.com/c/153338Reviewed-by: Keith Randall <khr@golang.org>

mkdir(2) inherits the parent directory group on *BSD (including Darwin),
and it may inherit on other platforms if the parent directory is SetGID.

This can cause TestRespectSetgidDir SetGID to fail when the process does
not have have permission for the inherited group on the new temporary
directory.

Fixes #29160

Change-Id: Iac05511e501dfe307a753f801223b1049cc0947d
Reviewed-on: https://go-review.googlesource.com/c/153357Reviewed-by: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This increases the time to wait from 1 to 2 seconds in the
TestAtomicStop testcase. When running with gccgo on ppc64
& ppc64le on a loaded systems these testcases can
intermittently fail with the current value.

Updates #29046

Change-Id: If420274dd65926d933a3024903b5c757c300bd60
Reviewed-on: https://go-review.googlesource.com/c/153826
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

This is a minor follow-up on https://golang.org/cl/153059.

TBR=iant

Updates #6794.

Change-Id: I03657dafc572959d46a03f86bbeb280825bc969d
Reviewed-on: https://go-review.googlesource.com/c/153845Reviewed-by: Robert Griesemer <gri@golang.org>

This change implements Payne-Hanek range reduction by Pi/4
to properly calculate trigonometric functions of huge arguments.

The implementation is based on:

"ARGUMENT REDUCTION FOR HUGE ARGUMENTS: Good to the Last Bit"
K. C. Ng et al, March 24, 1992

The major difference with the reference is that the simulated
multi-precision calculation of x*B is implemented using 64-bit
integer arithmetic rather than floating point to ease extraction
of the relevant bits of 4/Pi.

The assembly implementations for 386 were removed since the trigonometric
instructions only use a 66-bit representation of Pi internally for
reduction.  It is not possible to use these instructions and maintain
accuracy without a prior accurate reduction in software as recommended
by Intel.

Fixes #6794

Change-Id: I31bf1369e0578891d738c5473447fe9b10560196
Reviewed-on: https://go-review.googlesource.com/c/153059Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Updates #26148

Change-Id: Ide1fe821cc061a08488df9d40878131f37f894c9
Reviewed-on: https://go-review.googlesource.com/c/153844
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Update golang.org/x/sys/unix to revision b05ddf57801d2239d6ab0ee35f9d981e0420f4ac.

Changes exist in upstream golang.org/x/sys/unix, which allow for code to work and
tests to pass on openbsd/arm.

Change-Id: Iecc8598681a23cb0466f94c914f0e605a6fc64d7
Reviewed-on: https://go-review.googlesource.com/c/153838Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The OpenBSD armv7 port requires 64-bit alignment for cmsgs.

Rework the cmsg alignment code to facilitate this.

Change-Id: I52cf55a8a4cda46c6ef35b0f694862b842028b42
Reviewed-on: https://go-review.googlesource.com/c/153837
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>