ARM currently does not use a hardware yield instruction in the spin
loop in procyield because the YIELD instruction was only added in
ARMv6K. However, it appears earlier ARM chips will interpret the YIELD
encoding as an effective NOP (specifically an MSR instruction that
ultimately has no effect on the CPSR register).

Hence, use YIELD in procyield on ARM since it should be, at worst,
harmless.

Fixes #16663.

Change-Id: Id1787ac48862b785b92c28f1ac84cb4908d2173d
Reviewed-on: https://go-review.googlesource.com/45250
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

Done with grep & interactive search & replace, to double-check
replacements. Not many remained after CL 20022.

Fixes #18572

Change-Id: Idbe90ba3b584f9b9661d2bbd141607daaadfa41a
Reviewed-on: https://go-review.googlesource.com/45270Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>

Nobody uses 10.6 these days anyway.

Fixes #20623

Change-Id: I698c83cbc288082558e34097ff54d1428aed75ec
Reviewed-on: https://go-review.googlesource.com/45171Reviewed-by: Matt Layher <mdlayher@gmail.com>

If we're in a situation where printing the fp and sp in the traceback
is useful, it's almost certainly also useful to print the PC.

Change-Id: Ie48a0d5de8a54b5b90ab1d18638a897958e48f70
Reviewed-on: https://go-review.googlesource.com/45210
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

Updates #20587

Change-Id: I551a21c0226bc66fd7bca737c30cba679b958c37
Reviewed-on: https://go-review.googlesource.com/45091Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This results in names to unexported fields like
net.(*Dialer)."".deadline instead of net.(*Dialer).deadline.

Fixes #18419.

Change-Id: I0415c68b77cc16125c2401320f56308060ac3f25
Reviewed-on: https://go-review.googlesource.com/44070
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

The golang.org/x/tools/cmd/bundle tool previously had a bug where it
dropped some comments.

This regenerates it with the fixed version (https://golang.org/cl/45117).

(Upstream is still git rev 3470a06c1, from https://golang.org/cl/44331)

Updates #20548

Change-Id: Ic5d9208a0c8f7facdb7b315c6acab66ace34c0a9
Reviewed-on: https://go-review.googlesource.com/45158Reviewed-by: Hiroshi Ioka <hirochachacha@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Several of the CLs that were against the runtime are noted in other
places in the release notes, depending on where they are most
user-visible.

Change-Id: I167dc7ff17a4c5f9a5d22d5bd123aa0e99f5639e
Reviewed-on: https://go-review.googlesource.com/45137Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Rick Hudson <rlh@golang.org>

Change-Id: I361587ba0ddffb5ee4a3d1bdb6219710a30da197
Reviewed-on: https://go-review.googlesource.com/45132Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Rick Hudson <rlh@golang.org>

"MOVW R1, CPSR" is assembled to 0xe129f001, which should be 0xe12cf001.
"MOVW $255, CPSR" is assembled to 0xe329f0ff, which should be 0xe32cf0ff.

This patch fixes them and adds more assembly encoding tests.

fix #20626

Change-Id: Iefc945879ea774edf40438ce39f52c144e1501a1
Reviewed-on: https://go-review.googlesource.com/45170Reviewed-by: Cherry Zhang <cherryyz@google.com>

Because of parallel tests, which have stalled executions, the RUN
output of a test can be much earlier than its completion output resulting
in hard-to-read verbose output.

The tests are displayed in the order in which the output shows
that they began, to make it easy to line up with the "RUN" output.
Similarly, the definitions of when tests begin and complete is
determined by when RUN and FAIL/SKIP/PASS are output since the
focus of this code is on enhancing readability.

Fixes #19397

Change-Id: I4d0ca3fd268b620484e7a190117f79a33b3dc461
Reviewed-on: https://go-review.googlesource.com/44352
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

No test because as far as I can tell, there aren't existing tests for
these.

Fixes #18383

Change-Id: I06eaef05777a1474886167e3797c5bcd93189d1b
Reviewed-on: https://go-review.googlesource.com/45156
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

The net/http package has long documented that Request.ProtoMajor and
Request.ProtoMinor are ignored for outgoing requests (HTTP/1.1 or
HTTP/2 is always used, never HTTP/1.0). There was one part in the code
that was actually checking 1.0 vs 1.1, but it appears to have been
harmless. Remove it.

Fixes #18407

Change-Id: I362ed6c47ca2de7a2fbca917ed3e866273cfe41f
Reviewed-on: https://go-review.googlesource.com/45155
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Both runtime.exit and syscall.Exit call Windows ExitProcess.
But recently (CL 34616) runtime.exit was changed to ignore
Windows CreateThread errors if ExitProcess is called.

This CL adjusts syscall.Exit to do the same.

Fixes #18253 (maybe)

Change-Id: I6496c31b01e7c7d73b69c0b2ae33ed7fbe06736b
Reviewed-on: https://go-review.googlesource.com/45115
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Austin Clements <austin@google.com>

Some machines can be configured (or came/come configured) in such a
state that IPv6 only half works: you can bind on [::]:n but not
connect back to it.

This implements a fallback such that it's guaranteed that this pattern
works:

   ln, err := Listen("tcp", ":0")
   ...
   addr := ln.Addr().String() // "[::]:n"
   c, err := Dial("tcp", addr)

... which is also now tested. It will first try to dial "[::]:n", as
before, but if that dial fails, it will also try "0.0.0.0:n".

Fixes #18806 (contains more details)
Fixes #20611 (I was going to fix nacl later, but it was easy enough)

Change-Id: I1107eb197e902ae8185c781ad1bc4e2bc61d1f4c
Reviewed-on: https://go-review.googlesource.com/45088Reviewed-by: Paul Marks <pmarks@google.com>

Allow the Resolver.Dial func to return instances of Conn other than
*TCPConn and *UDPConn. If the Conn is also a PacketConn, assume DNS
messages transmitted over the Conn adhere to section 4.2.1. "UDP usage".
Otherwise, follow section 4.2.2. "TCP usage".

Provides a hook mechanism so that DNS queries generated by the net
package may be answered or modified before being sent to over the
network.

Updates #19910

Change-Id: Ib089a28ad4a1848bbeaf624ae889f1e82d56655b
Reviewed-on: https://go-review.googlesource.com/45153
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

TestServeTLS was added in CL 44074, merged today.
This cleans up the test a little.

Updates #13228

Change-Id: I6efd798fe5fa015a34addbf60ae26919a1ed283e
Reviewed-on: https://go-review.googlesource.com/45152
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Fixes #15731

Change-Id: I6f4da0cbb3b6c93e175f5e384ffa118f383b7c3b
Reviewed-on: https://go-review.googlesource.com/45089Reviewed-by: Ian Lance Taylor <iant@golang.org>

This adds diagnostics so we can tell if the finalizer has started, in
addition to whether or not it has finished.

Updates #19381.

Change-Id: Icb7b1b0380c9ad1128b17074828945511a6cca5d
Reviewed-on: https://go-review.googlesource.com/45138
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Fixes #11945.
Fixes #17446.

Change-Id: Ic674f6ebc0533ab0f97c650689125994941b72e1
Reviewed-on: https://go-review.googlesource.com/45081
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

runtime.GC no longer triggers a STW GC. This fixes the description of
GODEBUG=gctrace=1 so it doesn't claim otherwise.

Change-Id: Ibd34a55c5ae7b5eda5c2393b9a6674bdf1d51eb3
Reviewed-on: https://go-review.googlesource.com/45131Reviewed-by: Rick Hudson <rlh@golang.org>

Server.ServeTLS wraps Server.Serve with added TLS support. This is
particularly useful for serving on manually initialized listeners.
Example use-case includes ability to serve with TLS on listener
provided by systemd's socket activation.

A matching test heavily based on TestAutomaticHTTP2_ListenAndServe
is also included.

Original code by Gurpartap Singh as
https://go-review.googlesource.com/c/38114/

Fixes #13228

Change-Id: I73bb703f501574a84d261c2d7b9243a89fa52d62
Reviewed-on: https://go-review.googlesource.com/44074
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The test is passing on a 64bit RFS.

Fixes #18008

Change-Id: Ia4c4f4dde0392c7f6bbe5dbffc97cf848ec5a107
Reviewed-on: https://go-review.googlesource.com/44953Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #19092

Change-Id: I7c0fde6a4cf460017619dbcce1c1ddaa7af1022a
Reviewed-on: https://go-review.googlesource.com/44811Reviewed-by: Ian Lance Taylor <iant@golang.org>

For #14822.

Change-Id: Ia3f5558f3e0dcb8ee2dab54a6e9588eecc22511f
Reviewed-on: https://go-review.googlesource.com/45074Reviewed-by: Alan Donovan <adonovan@google.com>

For non-constant shifts with an untyped constant shift count, the
spec only said that it must "be converted to unsigned integer type".
go/types accepts any (arbitrarily large) integer value. Both cmd/compile
and gccgo require that the shift count be representable as a uint value
in that case (if the shift count is typed, it may be any unsigned integer
type).

This change adjusts the spec to state what the compilers have been doing
all along. The new wording matches similar rules elsewhere (e.g., for
untyped array and slice indices). Also, while technically this is a
restriction (we could permit arbitrarily large shift counts), in practice
this is irrelevant.

Fixes #14822.

Change-Id: Ia75834c67483cf761c10025c8df758f225ef67c2
Reviewed-on: https://go-review.googlesource.com/45072Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I78c6198eb909e679cf0f776b77dda52211bfd347
Reviewed-on: https://go-review.googlesource.com/45133
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

The current implementation of "goroutine N cmd" assumes it can get
goroutine N's state from the goroutine's sched buffer. But this only
works if the goroutine is blocked. Extend find_goroutine so that, if
there is no saved scheduler state for a goorutine, it tries to find
the thread the goroutine is running on and use the thread's current
register state. We also extend find_goroutine to understand saved
syscall register state.

Fixes #13887.

Change-Id: I739008a8987471deaa4a9da918655e4042cf969b
Reviewed-on: https://go-review.googlesource.com/45031
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I94aa87fe951701413b479c05b0bc8810255eb01c
Reviewed-on: https://go-review.googlesource.com/45085
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

TestBuildIDContainsArchModeEnv fails on arm64 because defaultGO386 has
different value from x86 (amd64/386). On arm64 defaultGO386 = '387' but
on x86 defaultGO386 = 'sse2'. The difference will make the test succeed
on x86 while fail on arm64 since it generates the same build ID.
Fix it by explicitly setting GO386 instead of using default value

Fixes #20608

Change-Id: I864b0e47325942d9513516bdf47f60391d18c0d0
Reviewed-on: https://go-review.googlesource.com/45112Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #20597.

Change-Id: Iaa059277c02e80a2fbef59cf8bb3c58d2b90fda0
Reviewed-on: https://go-review.googlesource.com/45111Reviewed-by: David Symonds <dsymonds@golang.org>

Fixes #20541.

Change-Id: Ifdfdf3616482b71761daf6d114b779a8ec532051
Reviewed-on: https://go-review.googlesource.com/44495
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

Fixes #19850

Change-Id: I8c86e288159408c687c2a85f458ade282adae450
Reviewed-on: https://go-review.googlesource.com/45077
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Remove note that sync.Cond, sync.Mutex, sync.RWMutex and atomic.Value
can be created as part of other data structures. Structs can be embedded
by default, and default should not be repeated.

Fixes #20471.

Change-Id: If3f5703d3f60abd96482b58ca43450d02a9e645a
Reviewed-on: https://go-review.googlesource.com/44071Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Prep work for issues mentioned below. No semantic or functionality change.

For #11945.
For #17446.

Change-Id: Ia1bb2b87647a6daa47f7863c0eb42cf5e1d35a7c
Reviewed-on: https://go-review.googlesource.com/45076Reviewed-by: Matthew Dempsky <mdempsky@google.com>

This change updates the vendored tzdata database to version 2017b
(released 2017-03-20).

The TestFirstZone test (which always uses the vendored database) is
updated to make it work with the new timezones database. (The Tokelau
abbreviation was changed from 'TKT' to the numeric abbreviation in
tzdata-2017a)

Fixes #19376

Change-Id: I0dea93e8703992de5c92c7840b8bacad9d02c50d
Reviewed-on: https://go-review.googlesource.com/44832
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Fixes #20602.

Change-Id: Iac1589484dec626c018314e0cea7efce091fd87d
Reviewed-on: https://go-review.googlesource.com/45075Reviewed-by: Matthew Dempsky <mdempsky@google.com>

The Tx methods Query and Exec uses context.Background()
even Tx was created by context.
This patch enables using Tx.ctx in all Tx methods
which do not has context arg.
Backward compatibility:
- If Tx has created without context, nothing changes.
- If Tx has created with context and non-context method is called:
  - If context is expired, the execution fails,
    but it can fail on Commit or Rollback as well,
    so in terms of whole transaction - nothing changes.
  - If context is not expired, nothing changes too.

Fixes #20098
Change-Id: I9570a2deaace5875bb4c5dcf7b3a084a6bcd0d00
Reviewed-on: https://go-review.googlesource.com/44956Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Daniel Theophanes <kardianos@gmail.com>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: Ib5efe172c55ff624b6771c2f02c466e35ba6cc50
Reviewed-on: https://go-review.googlesource.com/45090Reviewed-by: Rob Pike <r@golang.org>

Updates #20587

Change-Id: I39f7c43a13c887d9d563c108d3575db7f2dffe0e
Reviewed-on: https://go-review.googlesource.com/45050Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>