The original go tool pprof (written in Perl) got this right.
The Go rewrite never has, but should.

Change-Id: Ie1fc571214c61b1b5654a0bc90e15eb889adf059
Reviewed-on: https://go-review.googlesource.com/32617
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

The exported symbol for a plugin can be the only reference to a
type in a program. In particular, "var F func()" will have
the type *func(), which is uncommon.

Fixes #17140

Change-Id: Ide2104edbf087565f5377374057ae54e0c00c57e
Reviewed-on: https://go-review.googlesource.com/29692
Run-TryBot: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

Since Dial(":80") was implemented on Plan 9 (CL 32593),
TestProtocolDialError is failing because dialing a port
superior to 65535 is supported on Plan 9.

This change disallows dialing and listening on ports
superior to 65535.

Fixes #17761.

Change-Id: I95e8a163eeacf1ccd8ece7b650f16a0531c59709
Reviewed-on: https://go-review.googlesource.com/32594Reviewed-by: Russ Cox <rsc@golang.org>

CL 32101 fixed Dial(":80") on Windows and added TestDialLocal,
which was failing on Plan 9, because it wasn't implemented
on Plan 9.

This change implements Dial(":80") by connecting to 127.0.0.1
or ::1 (depending on network), so it works as documented.

Fixes #17760.

Change-Id: If0ff769299e09bebce11fc3708639c1d8c96c280
Reviewed-on: https://go-review.googlesource.com/32593Reviewed-by: Russ Cox <rsc@golang.org>

Fixes #17755

Change-Id: I1ad1edc382b1312d992963054eb82648cb5112d2
Reviewed-on: https://go-review.googlesource.com/32588
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

Generate bswap+load/store for reading/writing big endian data.
Helps encoding/binary.

name                    old time/op    new time/op    delta
ReadSlice1000Int32s-8     5.06µs ± 8%    4.58µs ± 8%   -9.50%        (p=0.000 n=10+10)
ReadStruct-8              1.07µs ± 0%    1.05µs ± 0%   -1.51%         (p=0.000 n=9+10)
ReadInts-8                 367ns ± 0%     363ns ± 0%   -1.15%          (p=0.000 n=8+9)
WriteInts-8                475ns ± 1%     469ns ± 0%   -1.45%        (p=0.000 n=10+10)
WriteSlice1000Int32s-8    5.03µs ± 3%    4.50µs ± 3%  -10.45%          (p=0.000 n=9+9)
PutUvarint32-8            17.2ns ± 0%    17.2ns ± 0%     ~     (all samples are equal)
PutUvarint64-8            46.7ns ± 0%    46.7ns ± 0%     ~           (p=0.509 n=10+10)

name                    old speed      new speed      delta
ReadSlice1000Int32s-8    791MB/s ± 8%   875MB/s ± 8%  +10.53%        (p=0.000 n=10+10)
ReadStruct-8            70.0MB/s ± 0%  71.1MB/s ± 0%   +1.54%         (p=0.000 n=9+10)
ReadInts-8              81.6MB/s ± 0%  82.6MB/s ± 0%   +1.21%          (p=0.000 n=9+9)
WriteInts-8             63.0MB/s ± 1%  63.9MB/s ± 0%   +1.45%        (p=0.000 n=10+10)
WriteSlice1000Int32s-8   796MB/s ± 4%   888MB/s ± 3%  +11.65%          (p=0.000 n=9+9)
PutUvarint32-8           233MB/s ± 0%   233MB/s ± 0%     ~           (p=0.089 n=10+10)
PutUvarint64-8           171MB/s ± 0%   171MB/s ± 0%     ~            (p=0.137 n=10+9)

Change-Id: Ia2dbdef92198eaa7e2af5443a8ed586d4b401ffb
Reviewed-on: https://go-review.googlesource.com/32222
Run-TryBot: Ilya Tocar <ilya.tocar@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

Follow-up to CL 32551.

Change-Id: If68f9581a7f13e04796aaff2007c09f8ea2c3611
Reviewed-on: https://go-review.googlesource.com/32586
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

The old code cannot handle unexported fields, it panics.
The new code returns error instead.

Fixes #17462

Change-Id: I927fc46b21d60e86cb52e84c65f2122f9159b21d
Reviewed-on: https://go-review.googlesource.com/31540
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

Fixes #17754
Updates #9478 (details in here)

Change-Id: Iae2c1ca05a18ed266b53b2594c22fc57fab33c5e
Reviewed-on: https://go-review.googlesource.com/32587
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

TestAssembly takes 20s on my machine,
which is too slow for normal operation.
Marking as -short has its dangers (#17472),
but hopefully we'll soon have a builder for that.

All the SSA tests are hermetic and not time sensitive
and can thus be run in parallel.
Reduces the cmd/compile/internal/gc test time during
all.bash on my laptop from 42s to 7s.

Updates #17751

Change-Id: Idd876421db23b9fa3475e8a9b3355a5dc92a5a29
Reviewed-on: https://go-review.googlesource.com/32585
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Updates http2 to x/net/http2 git rev 569280fa for:

   http2: fix over-aggressive ignoring of frames while in "go away" mode
   https://golang.org/cl/32583

Fixes #17733

Change-Id: I4008d2e14ce89782ce7e18b441b1181f98623b9d
Reviewed-on: https://go-review.googlesource.com/32584
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

Change-Id: I4b035b3539c98e5b1442d1009d457cbc199b42ee
Reviewed-on: https://go-review.googlesource.com/32637Reviewed-by: Matthew Dempsky <mdempsky@google.com>

Adapted from the mips64 test case.

Fixes #17745.

Change-Id: I46f0900028adb936dcab2cdc701ea11d0a3cb95e
Reviewed-on: https://go-review.googlesource.com/32611
Run-TryBot: Michael Munday <munday@ca.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Rob Pike <r@golang.org>

when compiling f(a, b, c), we do something like:
  *(SP+0) = eval(a)
  *(SP+8) = eval(b)
  *(SP+16) = eval(c)
  call f

If one of those evaluations is later determined to unconditionally panic
(say eval(b) in this example), then the call is deadcode eliminated. But
any previous argument write (*(SP+0)=... here) is still around. Becuase
we only compute the size of the outarg area for calls which are still
around at the end of optimization, the space needed for *(SP+0)=v is not
accounted for and thus the outarg area may be too small.

The fix is to make sure that we evaluate any potentially panicing
operation before we write any of the args to the stack. It turns out
that fix is pretty easy, as we already have such a mechanism available
for function args. We just need to extend it to possibly panicing args
as well.

The resulting code (if b and c can panic, but a can't) is:
  tmpb = eval(b)
  *(SP+16) = eval(c)
  *(SP+0) = eval(a)
  *(SP+8) = tmpb
  call f

This change tickled a bug in how we find the arguments for intrinsic
calls, so that latent bug is fixed up as well.

Update #16760.

Change-Id: I0bf5edf370220f82bc036cf2085ecc24f356d166
Reviewed-on: https://go-review.googlesource.com/32551Reviewed-by: Cherry Zhang <cherryyz@google.com>

The code to do the conversion is smaller than the
call to the runtime.
The 1-result asserts need to call panic if they fail, but that
code is out of line.

The only conversions left in the runtime are those which
might allocate and those which might need to generate an itab.

Given the following types:
  type E interface{}
  type I interface { foo() }
  type I2 iterface { foo(); bar() }
  type Big [10]int
  func (b Big) foo() { ... }

This CL inlines the following conversions:

was assertE2T
  var e E = ...
  b := i.(Big)
was assertE2T2
  var e E = ...
  b, ok := i.(Big)
was assertI2T
  var i I = ...
  b := i.(Big)
was assertI2T2
  var i I = ...
  b, ok := i.(Big)
was assertI2E
  var i I = ...
  e := i.(E)
was assertI2E2
  var i I = ...
  e, ok := i.(E)

These are the remaining runtime calls:

convT2E:
  var b Big = ...
  var e E = b
convT2I:
  var b Big = ...
  var i I = b
convI2I:
  var i2 I2 = ...
  var i I = i2
assertE2I:
  var e E = ...
  i := e.(I)
assertE2I2:
  var e E = ...
  i, ok := e.(I)
assertI2I:
  var i I = ...
  i2 := i.(I2)
assertI2I2:
  var i I = ...
  i2, ok := i.(I2)

Fixes #17405
Fixes #8422

Change-Id: Ida2367bf8ce3cd2c6bb599a1814f1d275afabe21
Reviewed-on: https://go-review.googlesource.com/32313
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: David Chase <drchase@google.com>

We generate an OpKeepAlive for the idata portion of the interface
for a runtime.KeepAlive call.  But given such an op, we need to keep
the entire containing variable alive, not just the range that was
passed to the OpKeepAlive operation.

Fixes #17710

Change-Id: I90de66ec8065e22fb09bcf9722999ddda289ae6e
Reviewed-on: https://go-review.googlesource.com/32477
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>

Update bundled x/net/http2 to x/net git rev 6c4ac8bd for:

   http2: fix Transport race sending RST_STREAM while reading DATA on cancels
   https://golang.org/cl/32571

   http2: remove h2-14 ALPN proto
   https://golang.org/cl/32576

Fixes #16974

Change-Id: I6ff8493a13d2641499fedf33e8005004735352ff
Reviewed-on: https://go-review.googlesource.com/32578
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The proper fix for the Writer is too involved to be done in time
for Go 1.8. Instead, we do a localized fix that simply disables the
prefix encoding logic. While this will prevent some legitimate uses
of prefix, it will ensure that we don't keep outputting invalid
GNU format files that have the prefix field populated.

For headers with long filenames that could have used the prefix field,
they will be promoted to use the PAX format, which ensures that we
will still be able to encode all headers that we were able to do before.

Updates #12594
Fixes #17630
Fixes #9683

Change-Id: Ia97b524ac69865390e2ae8bb0dfb664d40a05add
Reviewed-on: https://go-review.googlesource.com/32234Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Test adapted from the mips64 test.

Fixes #15454.

Change-Id: If890c2d18a4a03a08faaa2e674edd7223af60290
Reviewed-on: https://go-review.googlesource.com/22472
Run-TryBot: Michael Munday <munday@ca.ibm.com>
Reviewed-by: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Instead of writing out the original object for each alias, ensure we
export the original object before any aliases. This allows the aliases
to simply refer back to the original object by qualified name.

Fixes #17636.

Change-Id: If80fa8c66b8fee8344a00b55d25a8aef22abd859
Reviewed-on: https://go-review.googlesource.com/32575
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>

Windows sockets allow bind to 0.0.0.0:80 but not connect to it.
To make Listen(":80") / Dial(":80") work as documented on Windows,
connect to 127.0.0.1 or ::1 (depending on network) in place of 0.0.0.0.

Fixes #6290.

Change-Id: Ia27537067276871648546678fbe0f1b8478329fe
Reviewed-on: https://go-review.googlesource.com/32101
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Mikio Hara <mikioh.mikioh@gmail.com>

Currently, we don't have package testing to import package regexp directly,
because then regexp can't have internal tests (or at least they become more
difficult to write), for fear of an import cycle. The solution we've been using
is for the generated test main package (pseudo-import path "testmain", package main)
to import regexp and pass in a matchString function for use by testing when
implementing the -run flags. This lets testing use regexp but without depending
on regexp and creating unnecessary cycles.

We want to add a few dependencies to runtime/pprof, notably regexp
but also compress/gzip, without causing those packages to have to work
hard to write internal tests.

Restructure the (dare I say it) dependency injection of regexp.MatchString
to be more general, and use it for the runtime/pprof functionality in addition
to the regexp functionality. The new package testing/internal/testdeps is
the root for the testing dependencies handled this way.

Code using testing.MainStart will have to change from passing in a matchString
implementation to passing in testdeps.TestDeps{}. Users of 'go test' don't do this,
but other build systems that have recreated 'go test' (for example, Blaze/Bazel)
may need to be updated. The new testdeps setup should make future updates
unnecessary, but even so we keep the comment about MainStart not being
subject to Go 1 compatibility.

Change-Id: Iec821d2afde10c79f95f3b23de5e71b219f47b92
Reviewed-on: https://go-review.googlesource.com/32455Reviewed-by: Ian Lance Taylor <iant@golang.org>

Make it easier to find lines and update the file.

Change-Id: I9db78ffd7316fbc17c5488e178e23777756d8f47
Reviewed-on: https://go-review.googlesource.com/32454
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

CL 21870 moved the entire cmd/pprof/internal directory to cmd/internal/pprof
for use by cmd/trace, but really cmd/trace only needed cmd/pprof/internal/profile,
which became cmd/internal/pprof/profile, and then internal/pprof/profile.

Move the rest back under cmd/pprof so that it is clear that no other code
is reaching into the guts of cmd/pprof. Just like functions should not be
exported unless necessary, internals should not be made visible to more
code than necessary.

Raúl Silvera noted after the commit of CL 21870 that only the profile package
should have moved, but there was no followup fix (until now).

Change-Id: I603f4dcb0616df1e5d5eb7372e6fccda57e05079
Reviewed-on: https://go-review.googlesource.com/32453
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

This allows both the runtime and the cmd/pprof code to use the package,
just like we do for internal/trace.

Change-Id: I7606977284e1def36c9647354c58e7c1e93dba6b
Reviewed-on: https://go-review.googlesource.com/32452
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Updates the s390x-specific files in these packages with the changes
to the amd64-specific files made during the review of CL 31690. I'd
like to keep these files in sync unless there is a reason to
diverge.

Change-Id: Id83e5ce11a45f877bdcc991d02b14416d1a2d8d2
Reviewed-on: https://go-review.googlesource.com/32574Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I436528a4f81634448a60b1183d1b65a3bf4f48c1
Reviewed-on: https://go-review.googlesource.com/32590Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

Change-Id: I174d7307bfdd8ec57bb4266dab8569fd2234abb4
Reviewed-on: https://go-review.googlesource.com/32610Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

SWIG generates cgo input files in the work directory. When those files
are passed directly to cgo, cgo generates long file names that include
the object directory (with slashes replaced by underscores). Instead,
use cgo's new -srcdir option to give it short file names.

When using both SWIG and cgo, copy the cgo files into the object
directory first.

Use a shorter object file name when compiling the C file generated by
SWIG.

Fixes #17070.

Change-Id: Ic558603f1731636d9999f3130ad0224b24bd7dcb
Reviewed-on: https://go-review.googlesource.com/32485
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

Updates #13451

Change-Id: I2c3c66d9532c16e616c476e2afe31b3ddc0a8d79
Reviewed-on: https://go-review.googlesource.com/32371Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>

Automated update after manual classification using x/build/cmd/writenotes.

Change-Id: Ie92f501d301c1e2245954439da197812c09c1684
Reviewed-on: https://go-review.googlesource.com/32570Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

In a function argument, we handle a typedef for a pointer specially,
using the pointer type rather than the typedef, to permit the Go calls
to match the laxer type conversions permitted in C. We record the
typedef so that we use that type in the C code, in case it has a special
attribute. However, using the typedef is wrong when using a pointer to a
basic type, because the C code may sometimes use the typedef and
sometimes not, and using the typedef in all cases will cause incorrect
type errors on the Go side. Fortunately we only really need to use the
typedef when pointing to a struct/union/class, and in such a case
confusion is unlikely.

Fixes #17723.

Change-Id: Id2eaeb156faeaf2e8eb9cf0b8f95b44caf8cfbd2
Reviewed-on: https://go-review.googlesource.com/32536
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

It's never set anywhere, and even if it was, it would just Fatalf.

Change-Id: I84ade6d2068c623a8c85f84d8cdce38984996ddd
Reviewed-on: https://go-review.googlesource.com/32489
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Before aliases, and because we chose a simple export format for them,
a package may now export the same object more than once if there are
multiple exported aliases referring to that object. The go/importer
made the assumption this couldn't happen. Adjust it.

Fixes #17726.

Change-Id: Ibb9fc669a8748200b45ad78934d7453e5a5aad82
Reviewed-on: https://go-review.googlesource.com/32538Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Robert Griesemer <gri@golang.org>

Fixes #17697.

Change-Id: I3c47e139b09bde81566e29a1ac0ec8c58d55a34a
Reviewed-on: https://go-review.googlesource.com/32539
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Since SWIG uses cgo, when using SWIG with gccgo, the go tool will add a
_cgo_flags file to the package archive, just as it does with cgo. We
need to remove that file from the archive passed to the linker, just as
we do with cgo.

Change-Id: I5ef4fea92eec419f870fbf6f678691d15901ee6c
Reviewed-on: https://go-review.googlesource.com/32535
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Michael Hudson-Doyle <michael.hudson@canonical.com>

This feels a bit like a layering violation, but as the bug report shows
it is sometimes necessary.

Fixes #17642

Change-Id: I4ba060bb1ce73a527ce276e5a769c44692b50016
Reviewed-on: https://go-review.googlesource.com/32236
Run-TryBot: Michael Hudson-Doyle <michael.hudson@canonical.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

A plugin with no exported symbols is still potentially very useful.
Its init functions are called on load, and it so it can have visible
side effects.

Fixes #17681

Change-Id: Icdca31f48e5ab13c99020a2ef724f3de47dcd74b
Reviewed-on: https://go-review.googlesource.com/32437
Run-TryBot: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

When we lookup a qualified identifier, we need to unpack
an alias. Do this in all places, not just one. Duh!

Fixes #17716.
For #17592.

Change-Id: I58d57b17cc635d0408b370f109c719c16757fd8e
Reviewed-on: https://go-review.googlesource.com/32534Reviewed-by: Alan Donovan <adonovan@google.com>

The runtime.typeEquals function is used during typelinksinit to
determine the canonical set of *_type values to use throughout the
runtime. As such, it is run against non-canonical *_type values, that
is, types from modules that are duplicates of a type from another
module that was loaded earlier in the program life.

These non-canonical *_type values sometimes contain pointers. These
pointers are pointing to position-independent data, and so they are set
by ld.so using dynamic relocations when the module is loaded. As such,
the pointer can point to the equivalent memory from a previous module.

This means if typesEqual follows a pointer inside a *_type, it can end
up at a piece of memory from another module. If it reads a typeOff or
nameOff from that memory and attempts to resolve it against the
non-canonical *_type from the later module, it will end up with a
reference to junk memory.

Instead, resolve against the pointer the offset was read from, so the
data is valid.

Fixes #17709.
Should no longer matter after #17724 is resolved in a later Go.

Change-Id: Ie88b151a3407d82ac030a97b5b6a19fc781901cb
Reviewed-on: https://go-review.googlesource.com/32513
Run-TryBot: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>