Change the openbsd runtime to use the current sys_kill and sys_thrkill
system calls.

Prior to OpenBSD 5.9 the sys_kill system call could be used with both
processes and threads. In OpenBSD 5.9 this functionality was split into
a sys_kill system call for processes (with a new syscall number) and a
sys_thrkill system call for threads. The original/legacy system call was
retained in OpenBSD 5.9 and OpenBSD 6.0, however has been removed and
will not exist in the upcoming OpenBSD 6.1 release.

Note: This change is needed to make Go work on OpenBSD 6.1 (to be
released in May 2017) and should be included in the Go 1.8 release.
This change also drops support for OpenBSD 5.8, which is already an
unsupported OpenBSD release.

Change-Id: I525ed9b57c66c0c6f438dfa32feb29c7eefc72b0
Reviewed-on: https://go-review.googlesource.com/34093Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #18282

Change-Id: I024ca4a03bbbcccd48a0a6245bc3ec22c6a90288
Reviewed-on: https://go-review.googlesource.com/34254
TryBot-Result: Gobot Gobot <gobot@golang.org>
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
Reviewed-by: Rob Pike <r@golang.org>

The pclntable contains pointers to functions. If the function symbol
is exported in a plugin, and there is a matching symbol in the host
binary, then the pclntable of a plugin ends up pointing at the
function in the host module.

This doesn't work because the traceback code expects the pointer to
be in the same module space as the PC value.

So don't export functions that might overlap with the host binary.
This way the pointer stays in its module.

Updates #18190

Change-Id: Ifb77605b35fb0a1e7edeecfd22b1e335ed4bb392
Reviewed-on: https://go-review.googlesource.com/34196
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

This is required by RFC 5280.

Fixes #16686

Change-Id: I291c68dd97410a4f7ae7c4e524b91a2493ac50a9
Reviewed-on: https://go-review.googlesource.com/34245Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Specify that that LimitedReader returns EOF when the underlying
R returns EOF even if bytes remaining, N > 0.

Fixes #18271

Change-Id: I990a7135f1d31488d535238ae061d42ee96bacb7
Reviewed-on: https://go-review.googlesource.com/34249Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: Icb842a80cab2b07b9ace1e8e14c4a19c48a92c43
Reviewed-on: https://go-review.googlesource.com/34247Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Daniel Theophanes <kardianos@gmail.com>

Made many minor changes so that the document is consistent with itself.

Some more noticeable changes:
* CL/34141: Revert "testing: add T.Context method"
* CL/33630: net/http: document restrictions on ETag as expected by ServeContent

Change-Id: I39ae5e55c56e374895c115e6852998c940beae35
Reviewed-on: https://go-review.googlesource.com/34243Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Must add locations to the profile when generating a profile.proto.
This fixes #18229

Change-Id: I49cd63a30759d3fe8960d7b7c8bd5a554907f8d1
Reviewed-on: https://go-review.googlesource.com/34028Reviewed-by: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Fixes the build.

Updates #18199

Change-Id: Ibf029ba9f9293d1f3d49c1c8773fc262159a5d5b
Reviewed-on: https://go-review.googlesource.com/34242Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #17888

Change-Id: I7490b95a03b810a0f7ed1f07f37d7c7b3ac036be
Reviewed-on: https://go-review.googlesource.com/34240Reviewed-by: Dmitri Shuralyov <shurcool@gmail.com>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>

Fixes #18234.

Change-Id: I0f18992ea14e13f283873ac295f0b49d6b7dd8b2
Reviewed-on: https://go-review.googlesource.com/34191Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>

This reverts commit 26827bc2.

Fixes #18199

Change-Id: I42e292cb4e3d740a4fbb5d0380c6ee15ac742092
Reviewed-on: https://go-review.googlesource.com/34141Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Fixes #18168

Change-Id: Idbfe3d4daedd93c7caf6f1770ecd988e9af39949
Reviewed-on: https://go-review.googlesource.com/34144Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #18257

Change-Id: Iafba5aa0a0641cfe36351bb0e4b57f20257fdc4e
Reviewed-on: https://go-review.googlesource.com/34210Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I395625dca9b719290c52d2c46f60b53e8fb3abc4
Reviewed-on: https://go-review.googlesource.com/34139
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #17938

Change-Id: Iad12155f4976846bd4a9a53869f89e40e5b3deb3
Reviewed-on: https://go-review.googlesource.com/34147
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>

There is nothing notable to mention as far as users are concerned.

Fixes #17929 (another bug tracks the remaining TODO item)

Change-Id: Id39f787581ed9d2ecd493126bb7ca27836816d4b
Reviewed-on: https://go-review.googlesource.com/34145Reviewed-by: Michael Matloob <matloob@golang.org>

This rolls back https://golang.org/cl/27117 partly, softening it so it
only retries POST/PUT/DELETE etc requests where there's no Body (nil
or NoBody). This is a little useless, since most idempotent requests
have a body (except maybe DELETE), but it's late in the Go 1.8 release
cycle and I want to do the proper fix.

The proper fix will look like what we did for http2 and only retrying
the request if Request.GetBody is defined, and then creating a new request
for the next attempt. See https://golang.org/cl/33971 for the http2 fix.

Updates #15723
Fixes #18239
Updates #18241

Change-Id: I6ebaa1fd9b19b5ccb23c8d9e7b3b236e71cf57f3
Reviewed-on: https://go-review.googlesource.com/34134
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tom Bergan <tombergan@google.com>

Fixes #18250

Change-Id: I4f61591356ddb4a906c206ad8456d1839daf7b91
Reviewed-on: https://go-review.googlesource.com/34170
Run-TryBot: Michael Hudson-Doyle <michael.hudson@canonical.com>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

The combination of two prior CLs can cause panics:
* CL/17873: make chained multiReader Read more efficient
* CL/28533: make MultiReader nil exhausted Readers for earlier GC

The first CL allows MultiReader to "inherit" another MultiReader's list of Readers
for efficiency reasons. This is problematic when combined with the
later CL since that can set prior Readers in that list to nil for GC reasons.
This causes panics when two MultiReaders are used together (even synchronously).

To fix this, rather than setting consumed Readers as nil, we set them with
a special eofReader that always returns EOF.

Fixes #18232

Change-Id: I2a9357ab217e3d54d38ea9022d18e4d14f4182d3
Reviewed-on: https://go-review.googlesource.com/34140Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Fixes #18240.

Change-Id: Ife951e2c1320b3f1362c85642615b24fd4291189
Reviewed-on: https://go-review.googlesource.com/34135Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I929f66b713525f5273cf0fe09579835603279b58
Reviewed-on: https://go-review.googlesource.com/34023Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I271707dee03fd97cd37bfb116eb00a5532034b57
Reviewed-on: https://go-review.googlesource.com/34020
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This adds a counter for the number of times the application forced a
GC by, e.g., calling runtime.GC(). This is useful for detecting
applications that are overusing/abusing runtime.GC() or
debug.FreeOSMemory().

Fixes #18217.

Change-Id: I990ab7a313c1b3b7a50a3d44535c460d7c54f47d
Reviewed-on: https://go-review.googlesource.com/34067Reviewed-by: Russ Cox <rsc@golang.org>

Change-Id: Ib9ba8f0b8785f1b0ddb29214beb8674dc06f7422
Reviewed-on: https://go-review.googlesource.com/34111Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

While processing a symbol for a function, if it is determined
that a function would make the text section too large then
a new text section is created and the address of the function
is in the new text section.  But the symbol for the function
is marked as being in the previous text section, causing
incorrect codegen for the function and leading to a segv if
that function is called.  This adds code to set the sym.Sect
field to the new section if a new one is created.  Note that
this problem only happens at the point where a new section is
created.

Fixes #18218

Change-Id: Ic21ae11368d9d88ff6d5d3977f9ea72fe6477ed1
Reviewed-on: https://go-review.googlesource.com/34069
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Carlos Eduardo Seo <cseo@linux.vnet.ibm.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

150 is too high for some people.

Reports of 132, 145, 149 on OS X.

Fixes #18203

Change-Id: I559639aba7e87e07d1a1249f8b212b3f34a078ab
Reviewed-on: https://go-review.googlesource.com/34019Reviewed-by: Russ Cox <rsc@golang.org>

When we copy the stack, we need to adjust all BPs.
We correctly adjust the ones on the stack, but we also
need to adjust the one that is in g.sched.bp.

Like CL 33754, no test as only kernel-gathered profiles will notice.
Tests will come (in 1.9) with the implementation of #16638.

The invariant should hold that every frame pointer points to
somewhere within its stack.  After this CL, it is mostly true, but
something about cgo breaks it.  The runtime checks are disabled
until I figure that out.

Update #16638
Fixes #18174

Change-Id: I6023ee64adc80574ee3e76491d4f0fa5ede3dbdb
Reviewed-on: https://go-review.googlesource.com/33895Reviewed-by: Austin Clements <austin@google.com>

Change-Id: If30ccfcf56d56fb40102ad567a980793bd39f320
Reviewed-on: https://go-review.googlesource.com/34071Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Fixes #16821.

Change-Id: I63d5f3d7cfba1c76259912d754025c5f3cbe4a56
Reviewed-on: https://go-review.googlesource.com/31573
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Previously it was possible to craft a DSA private key that would cause
Sign() to loop forever because no signature could be valid. This change
does some basic sanity checks and ensures that Sign will always
terminate.

Thanks to Yolan Romailler for highing this.

Be aware, however, that it's still possible for an attacker to simply
craft a private key with enormous values and thus cause Sign to take an
arbitrary amount of time.

Change-Id: Icd53939e511eef513a4977305dd9015d9436d0ce
Reviewed-on: https://go-review.googlesource.com/33725Reviewed-by: Yolan Romailler <y@romailler.ch>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>

Fixes TestLookupPort_Minimal on android.

Fixes #18213

Change-Id: I1b65e790525d339a4cb7f17afe7e3a02c4587302
Reviewed-on: https://go-review.googlesource.com/34014Reviewed-by: Russ Cox <rsc@golang.org>

It is reported as failing for two people (issues #18202 and #18212).
The failure mode is that the system gets overloaded and other programs
fail to run.

Fixes #18202.

Change-Id: I1f1ca1f5d8eed6cc3a9dffac3289851e09fa662b
Reviewed-on: https://go-review.googlesource.com/34017
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #18153

Change-Id: Ie8a32dd6fe306f00e51cde77dd4ea353f7109940
Reviewed-on: https://go-review.googlesource.com/34010Reviewed-by: Ian Lance Taylor <iant@golang.org>

Fixes #18207

Change-Id: Ibe85ab0acba7553b93603a31140b31bd9e4802cf
Reviewed-on: https://go-review.googlesource.com/34015Reviewed-by: Ian Lance Taylor <iant@golang.org>

Mention that the best-effort race detector on maps
was upgraded to detect write/iterate races.

Fixes #18137

Change-Id: Ib6e0adde47e965126771ea712386031a2a55eba3
Reviewed-on: https://go-review.googlesource.com/33768Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This CL adds a simple example for StructOf.
The example shows how StructOf can be used in a JSON roundtrip.

Change-Id: I9ff1ea9cb8c0cf297c5fae74e68b89931076adfd
Reviewed-on: https://go-review.googlesource.com/33953
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

Updates bundled x/net/http2 to git rev 8dab9293 for:

    http2: make Transport retry on server's GOAWAY graceful shutdown
    https://golang.org/cl/33971

Fixes #18083

Change-Id: I676f5eb4b490a4d86356778bb17296c451f16d90
Reviewed-on: https://go-review.googlesource.com/34011
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tom Bergan <tombergan@google.com>

Conditioning on the plugin.Open symbol existing before loading all
symbols means sometimes some packages don't have a hash value.

Fixes #17928

Change-Id: I2722449aa58eca08a25117d3ce976f11f805b5ac
Reviewed-on: https://go-review.googlesource.com/33925
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I811e76c9f42505e974bea634d4ded2499e4893db
Reviewed-on: https://go-review.googlesource.com/33926Reviewed-by: Ian Lance Taylor <iant@golang.org>