The way to send an explicitly-zero Content-Length is to set a nil Body.

Fix this test to do that, rather than relying on type sniffing.

Updates #17480
Updates #17071

Change-Id: I6a38e20f17013c88ec4ea69d73c507e4ed886947
Reviewed-on: https://go-review.googlesource.com/31434
TryBot-Result: Gobot Gobot <gobot@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Chris Broadfoot <cbro@golang.org>

"go env" previously only printed a subset of the documented environment
variables; now it includes everything, such as GO386 and CGO_*.

This also fixes the CGO_CFLAGS environment variable to always have the
same default. According to iant@ and confirmed by testing, cgo can now
understand the default value of CGO_CFLAGS.

Fixes #17191.

Change-Id: Icf75055446dd250b6256ef1139e9ce848f4a9d3b
Reviewed-on: https://go-review.googlesource.com/31330
TryBot-Result: Gobot Gobot <gobot@golang.org>
Run-TryBot: Quentin Smith <quentin@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

instrumentnode() accidentally copies parent's already-instrumented nodes
into child's Ninit block. This generates repeated code in race-instrumentation.
This case surfaces only when it duplicates inline-labels, because of
compile time error. In other cases, it silently generates incorrect
instrumented code. This change prevents it from doing so.

Fixes #17449.

Change-Id: Icddf2198990442166307e176b7e20aa0cf6c171c
Reviewed-on: https://go-review.googlesource.com/31317Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Interface methods can't have function bodies, so there's no need to
process their parameter lists as variable declarations. The only
possible reason would be to check for duplicate parameter names and/or
invalid types, but we do that anyway, and have regression tests for it
(test/funcdup.go).

Change-Id: Iedb15335467caa5d872dbab829bf32ab8cf6204d
Reviewed-on: https://go-review.googlesource.com/31430
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Fixes #17355

Change-Id: I5390979cd0081b61a639466377faa46b4221b74a
Reviewed-on: https://go-review.googlesource.com/31329
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

This change omits the stack check on ppc64 and s390x when the size of
a stack frame is less than obj.StackSmall. This is an optimization
x86 already performs.

The effect on s390x isn't huge because we were already omitting the
stack check when the frame size was 0 (it shaves about 1K from the
size of bin/go). On ppc64 however this change reduces the size of the
.text section in bin/go by 33K (1%).

Updates #13379 (for ppc64).

Change-Id: I6af0eb987646bea47fcaf0a812db3496bab0f680
Reviewed-on: https://go-review.googlesource.com/31357Reviewed-by: David Chase <drchase@google.com>

This issue has been fixed in CL 31390.

Fixes #15464.

Change-Id: I35e088f37bf3b544100ff131c72690bcfd788e5b
Reviewed-on: https://go-review.googlesource.com/31393Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This issue has been fixed in CL 31390.

Fixes #11476.

Change-Id: I6658bda2e494d3239d62c49d0bd5d34a36b744d0
Reviewed-on: https://go-review.googlesource.com/31394Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Previously, in acceptPlan9 we set netFD.ctl to the listener's
/net/tcp/*/listen file instead of the accepted connection's
/net/tcp/*/ctl file.

In netFD.Read, we write "close" to netFD.ctl to close the
connection and wake up the readers. However, in the
case of an accepted connection, we got the error
"write /net/tcp/*/listen: inappropriate use of fd"
because the /net/tcp/*/listen doesn't handle the "close" message.

In this case, the connection wasn't closed and the readers
weren't awake.

We modified the netFD structure so that netFD.ctl represents
the accepted connection and netFD.listen represents the
listener.

Change-Id: Ie38c7dbaeaf77fe9ff7da293f09e86d1a01b3e1e
Reviewed-on: https://go-review.googlesource.com/31390
Run-TryBot: David du Colombier <0intro@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

- Like ",any" for elements, add ",any,attr" for attributes to allow
  a mop-up field that gets any otherwise unmapped attributes.
- Map attributes to fields of type slice by extending the slice,
  just like for elements.
- Allow storing an attribute into an xml.Attr directly, to provide
  a way to record the name.

Combined, these three independent features allow

	AllAttrs []Attr `xml:",any,attr"`

to collect all attributes not otherwise spoken for in a particular struct.

Tests based on CL 16292 by Charles Weill.

Fixes #3633.

Change-Id: I2d75817f17ca8752d7df188080a407836af92611
Reviewed-on: https://go-review.googlesource.com/30946Reviewed-by: Quentin Smith <quentin@golang.org>

Fixes #17059.

Change-Id: I5c7ee46604399f7dc3c3c49f964cbb1aa6c0d621
Reviewed-on: https://go-review.googlesource.com/31320Reviewed-by: Ian Lance Taylor <iant@golang.org>

Previously, we used to write the "hangup" message to
the TCP connection control file to be able to close
a connection, while waking up the readers.

The "hangup" message closes the TCP connection with a
RST message. This is a problem when closing a connection
consecutively to a write, because the reader may not have
time to acknowledge the message before the connection is
closed, resulting in loss of data.

We use a "close" message, newly implemented in the Plan 9
kernel to be able to close a TCP connection gracefully with a FIN.

Updates #15464.

Change-Id: I2050cc72fdf7a350bc6c9128bae7d14af11e599c
Reviewed-on: https://go-review.googlesource.com/31271
Run-TryBot: David du Colombier <0intro@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #16502.

Change-Id: Id8e117a724d73cd51844c06d47bbeba61f8dc827
Reviewed-on: https://go-review.googlesource.com/31324Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>

Fixes #16404.

Change-Id: Iabaeeef3eff2fff6e5ed2d6bc9ef9c2f6d1cb5e7
Reviewed-on: https://go-review.googlesource.com/31332Reviewed-by: Ian Lance Taylor <iant@golang.org>

The comments added for Go 1.7 are very close.
Make explicit that they only apply if the timer is
not known to have expired already.

Fixes #14038.

Change-Id: I6a38be7b2015e1571fc477e18444a8cee38aab29
Reviewed-on: https://go-review.googlesource.com/31350Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #14139.

Change-Id: I6d2181720c38582b3d2160e94c7593a6cb4fc60f
Reviewed-on: https://go-review.googlesource.com/31321Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

cmd.StdinPipe returns an io.WriteCloser.
It's reasonable to expect the caller not to call Write and Close simultaneously,
but there is an implicit Close in cmd.Wait that's not obvious.
We already synchronize the implicit Close in cmd.Wait against
any explicit Close from the caller. Also synchronize that implicit
Close against any explicit Write from the caller.

Fixes #9307.

Change-Id: I8561e9369d6e5ac88dfbca1175549f6dfa04b8ac
Reviewed-on: https://go-review.googlesource.com/31148Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

In the zero Time, the (not user visible) nil *Location indicates UTC.
In the result of t.UTC() and other ways to create times in specific
zones, UTC is indicated by a non-nil *Location, specifically &utcLoc.
This creates a representation ambiguity exposed by comparison with ==
or reflect.DeepEqual or the like.

Change time.Time representation to use only nil, never &utcLoc,
to represent UTC. This eliminates the ambiguity.

Fixes #15716.

Change-Id: I7dcc2c20ce6b073e1daae323d3e49d17d1d52802
Reviewed-on: https://go-review.googlesource.com/31144Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This change documents that the InterfaceAddrs function is less usable on
multi-homed IP nodes because of the lack of network interface
identification information.

Also updates documentation on exposed network interface API.

Fixes #14518.

Change-Id: I5e86606f8019ab475eb5d385bd797b052cba395d
Reviewed-on: https://go-review.googlesource.com/31371Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Creates a ColumnType structure that can be extended in to future.
Allow drivers to implement what makes sense for the database.

Fixes #16652

Change-Id: Ieb1fd64eac1460107b1d3474eba5201fa300a4ec
Reviewed-on: https://go-review.googlesource.com/29961
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Check for and call the special printing and format methods such as String
at printing depth 0 when printing the concrete value of a reflect.Value.

Fixes: #16015

Change-Id: I23bd2927255b60924e5558321e98dd4a95e11c4c
Reviewed-on: https://go-review.googlesource.com/30753Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Martin Möhrmann <martisch@uos.de>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This CL changes how the http1 Server reads from the client.

The goal of this change is to make the Request.Context given to Server
Handlers become done when the TCP connection dies (has seen any read
or write error). I didn't finish that for Go 1.7 when Context was
added to http package.

We can't notice the peer disconnect unless we're blocked in a Read
call, though, and previously we were only doing read calls as needed,
when reading the body or the next request. One exception to that was
the old pre-context CloseNotifier mechanism.

The implementation of CloseNotifier has always been tricky. The past
few releases have contained the complexity and moved the
reading-from-TCP-conn logic into the "connReader" type. This CL
extends connReader to make sure that it's always blocked in a Read
call, at least once the request body has been fully consumed.

In the process, this deletes all the old CloseNotify code and unifies
it with the context cancelation code. The two notification mechanisms
are nearly identical, except the CloseNotify path always notifies on
the arrival of pipelined HTTP/1 requests. We might want to change that
in a subsequent commit. I left a TODO for that. For now there's no
change in behavior except that the context now cancels as it was
supposed to.

As a bonus that fell out for free, a Handler can now use CloseNotifier
and Hijack together in the same request now.

Fixes #15224 (make http1 Server always in a Read, like http2)
Fixes #15927 (cancel context when underlying connection closes)
Updates #9763 (CloseNotifier + Hijack)

Change-Id: I972cf6ecbab7f1230efe8cc971e89f8e6e56196b
Reviewed-on: https://go-review.googlesource.com/31173
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

This change enables the ChaCha20-Poly1305 cipher suites by default. This
changes the default ClientHello and thus requires updating all the
tests.

Change-Id: I6683a2647caaff4a11f9e932babb6f07912cad94
Reviewed-on: https://go-review.googlesource.com/30958
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

GetConfigForClient allows the tls.Config to be updated on a per-client
basis.

Fixes #16066.
Fixes #15707.
Fixes #15699.

Change-Id: I2c675a443d557f969441226729f98502b38901ea
Reviewed-on: https://go-review.googlesource.com/30790
Run-TryBot: Adam Langley <agl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes #13737.

Change-Id: Ib655dbf06f44709f687f8a2410c80f31e4075f13
Reviewed-on: https://go-review.googlesource.com/31322
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Fixes #16460.

Change-Id: Ie9d5f725d2d7e8210ab6f7604a5a05fc49f707de
Reviewed-on: https://go-review.googlesource.com/31331
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

It's the same as %#x not %x.

Just a documentation change; tests already cover it.

Fixes #17322

Change-Id: Ia9db229f781f9042ac5c0bb824e3d7a26fb74ec5
Reviewed-on: https://go-review.googlesource.com/31254Reviewed-by: Russ Cox <rsc@golang.org>

In addition to the DecimalConversion benchmark, that exercises the
String method of the internal decimal type on a range of small shifts,
add a few benchmarks for the big.Float String method. They can be used
to obtain more realistic data on the real-world performance of
big.Float printing.

Change-Id: I7ada324e7603cb1ce7492ccaf3382db0096223ba
Reviewed-on: https://go-review.googlesource.com/31275Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Fixes #17030.

Change-Id: Ic7f237ac7553ae0176929056e64b01667ed59066
Reviewed-on: https://go-review.googlesource.com/31351
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This will cause godoc to correctly render these docs,
since go/doc.ToHTML requires no punctuation for headings.

Change-Id: Ic95245147d3585f2ccc59d4424fcab17d2a5617b
Reviewed-on: https://go-review.googlesource.com/31319Reviewed-by: Rob Pike <r@golang.org>

Fixes #17461

Change-Id: I9954f6ae46c7e15560d7460841be8f2bc37233a9
Reviewed-on: https://go-review.googlesource.com/31121Reviewed-by: Adam Langley <agl@golang.org>
Run-TryBot: Adam Langley <agl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

The comments about pcln functions are obsolete since those functions
now live in cmd/internal/obj. The copyright header is redundant with
the existing one at the top of the file.

Change-Id: I568fd3d259253a0d8eb3b0a157d008df1b5de106
Reviewed-on: https://go-review.googlesource.com/31315Reviewed-by: Ian Lance Taylor <iant@golang.org>

all.bash passes with -debugtramp=2 (except the unavoidable
disassembly test as we change instructions). And successfully
build k8s.io/kubernetes/cmd/hyperkube in both internal linking
and external linking mode.

Fixes #17028.

Change-Id: Ic8fac6a394488155c5eba9215662db1c1086e24b
Reviewed-on: https://go-review.googlesource.com/31143Reviewed-by: David Chase <drchase@google.com>

Although an AEAD, in general, can be used concurrently in both the seal
and open directions, TLS is easier. Since the transport keys are
different for different directions in TLS, an AEAD will only ever be
used in one direction. Thus we don't need separate buffers for seal and
open because they can never happen concurrently.

Also, fix the nonce size to twelve bytes since the fixed-prefix
construction for AEADs is superseded and will never be used for anything
else now.

Change-Id: Ibbf6c6b1da0e639f4ee0e3604410945dc7dcbb46
Reviewed-on: https://go-review.googlesource.com/30959
Run-TryBot: Adam Langley <agl@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This reverts commit c6185aa6. That
commit seems to be causing flaky failures on the builders. See
discussion on the original thread: https://golang.org/cl/25159.

Change-Id: I26e72d962d4efdcee28a0bc61a53f246b046df77
Reviewed-on: https://go-review.googlesource.com/31316
Run-TryBot: Adam Langley <agl@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

This change adds support for the ChaCha20-Poly1305 AEAD to crypto/tls,
as specified in https://tools.ietf.org/html/rfc7905.

Fixes #15499.

Change-Id: Iaa689be90e03f208c40b574eca399e56f3c7ecf1
Reviewed-on: https://go-review.googlesource.com/30957
Run-TryBot: Adam Langley <agl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This change updates the vendored chacha20poly1305 package to match
revision 14f9af67c679edd414f72f13d67c917447113df2 of x/crypto.

Change-Id: I05a4ba86578b0f0cdb1ed7dd50fee3b38bb48cf5
Reviewed-on: https://go-review.googlesource.com/31312
Run-TryBot: Adam Langley <agl@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: I34b3650ee9512879ff7528336813a7850c46ea90
Reviewed-on: https://go-review.googlesource.com/31311Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This reverts commit 395d36a6.

Appears to be responsible for builder failures.

Change-Id: Ic6c6307f662767e529060b88704a9f074785d99e
Reviewed-on: https://go-review.googlesource.com/31310
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>

This is needed for some of the more complex primality tests
(to filter out exact squares), and while the code is simple the
boundary conditions are not obvious, so it seems worth having
in the library.

Change-Id: Ica994a6b6c1e412a6f6d9c3cf823f9b653c6bcbd
Reviewed-on: https://go-review.googlesource.com/30706
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>