When go parses #cgo lines, expand ${SRCDIR} into the path to the
source directory. This allows options to be passed to the
compiler and linker that involve file paths relative to the
source code directory. Without the expansion the paths would be
invalid when the current working directory changes.

Fixes #7891
Fixes #5428

Change-Id: I343a145a9771a5ccbaa958e4a1ecd1716fcae52d
Reviewed-on: https://go-review.googlesource.com/1756Reviewed-by: Ian Lance Taylor <iant@golang.org>

Test more stuff:
1) flagNoPointers, an incorrect value was the cause of #9425
2) Total function layout size
3) gc program

Change-Id: I73f65fe740215938fa930d2f096febd9db0a0021
Reviewed-on: https://go-review.googlesource.com/2090Reviewed-by: Ian Lance Taylor <iant@golang.org>

The code concerning quoted-printable encoding (RFC 2045) and its
variant for MIME headers (RFC 2047) is currently spread in
mime/multipart and net/mail. It is also not exported.

This commit is the first step to fix that issue. It moves the
quoted-printable decoding code from mime/multipart to
mime/internal/quotedprintable. The exposed API is unchanged.

Concerns #4943.

Change-Id: I11352afbb2edb4d6ef62870b9bc5c87c639eff12
Reviewed-on: https://go-review.googlesource.com/1810Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Add a nil byte at the end of the itoa buffer,
before calling gostringnocopy. This prevents
gostringnocopy to read past the buffer size.

Change-Id: I87494a8dd6ea45263882536bf6c0f294eda6866d
Reviewed-on: https://go-review.googlesource.com/2033Reviewed-by: Aram Hăvărneanu <aram@mgk.ro>

Originally it used r.Int63() to show "Uint32", and now we use the correct r.Uint32() method.

Fixes #9429

Change-Id: I8a1228f1ca1af93b0e3104676fc99000257c456f
Reviewed-on: https://go-review.googlesource.com/2069Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

These tests were enabled as part of change 1774.
They depend on the errchk tool, which is a Perl
script. However, Perl is not available on Plan 9.

Change-Id: I82707aae16013acc9a3800d39b0084588b852b53
Reviewed-on: https://go-review.googlesource.com/2031Reviewed-by: Minux Ma <minux@golang.org>

During change 1864 discussion, Russ Cox pointed out
the fatal function shouldn't print errstr.

Change-Id: Icd71ec04be9c944bc235b8b198158465172e4fde
Reviewed-on: https://go-review.googlesource.com/2030Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I171298e7942093e9cc82e3a0c4fcbb5b10298816
Reviewed-on: https://go-review.googlesource.com/1998Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: Iaad548ea90d3b70341a723450d5e4d4c2b88856f
Reviewed-on: https://go-review.googlesource.com/2063Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

More cmd/api/run.go hell.

Fixes #9407

Change-Id: If8fb446a2471d6372beb0534c9ab6824029b404c
Reviewed-on: https://go-review.googlesource.com/2054Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Minux Ma <minux@golang.org>

Change-Id: I17ddcb541dfac8b1e48e01ee005563031b6ade2a
Reviewed-on: https://go-review.googlesource.com/2062Reviewed-by: Ian Lance Taylor <iant@golang.org>

The freebsd-386 and freebsd-amd64 builders are timing out sometimes.
This will give them some more breathing room.

Change-Id: Ib65bd172cca046a52861759a4232d7b4b6514fa8
Reviewed-on: https://go-review.googlesource.com/1994Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I55419cb580e6d18cf1c17c3e7bb8777ed6d794e7
Reviewed-on: https://go-review.googlesource.com/1995Reviewed-by: Ian Lance Taylor <iant@golang.org>

malloc checks kindNoPointers and if it is not set and the object
is one pointer in size, it assumes it contains a pointer.  So we
must set kindNoPointers correctly; it isn't just a hint.

Fixes #9425

Change-Id: Ia43da23cc3298d6e3d6dbdf66d32e9678f0aedcf
Reviewed-on: https://go-review.googlesource.com/2055Reviewed-by: Russ Cox <rsc@golang.org>

Replace with uses of //go:linkname in Go files, direct use of name in .s files.
The only one that really truly needs a jump is reflect.call; the jump is now
next to the runtime.reflectcall assembly implementations.

Change-Id: Ie7ff3020a8f60a8e4c8645fe236e7883a3f23f46
Reviewed-on: https://go-review.googlesource.com/1962Reviewed-by: Austin Clements <austin@google.com>

issue9400_linux.go did not build on 386 because it used a constant
that was larger than a 32-bit int in a ... argument.  Fix this by
casting the constant to uint64 (to match how the constant is being
used).

Change-Id: Ie8cb64c3910382a41c7852be7734a62f0b2d5a21
Reviewed-on: https://go-review.googlesource.com/2060Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I90a8ca51269528a307e0d6f52436fc7913cd7900
Reviewed-on: https://go-review.googlesource.com/1541Reviewed-by: Russ Cox <rsc@golang.org>

These signals are used by glibc to broadcast setuid/setgid to all
threads and to send pthread cancellations.  Unlike other signals, the
Go runtime does not intercept these because they must invoke the libc
handlers (see issues #3871 and #6997).  However, because 1) these
signals may be issued asynchronously by a thread running C code to
another thread running Go code and 2) glibc does not set SA_ONSTACK
for its handlers, glibc's signal handler may be run on a Go stack.
Signal frames range from 1.5K on amd64 to many kilobytes on ppc64, so
this may overflow the Go stack and corrupt heap (or other stack) data.

Fix this by ensuring that these signal handlers have the SA_ONSTACK
flag (but not otherwise taking over the handler).

This has been a problem since Go 1.1, but it's likely that people
haven't encountered it because it only affects setuid/setgid and
pthread_cancel.

Fixes #9600.

Change-Id: I6cf5f5c2d3aa48998d632f61f1ddc2778dcfd300
Reviewed-on: https://go-review.googlesource.com/1887Reviewed-by: Ian Lance Taylor <iant@golang.org>

Currently when we get a CGI or FCGI request, the remote port of the client
is hard coded to zero, despite nearly every webserver passing down the
REMOTE_PORT variable.

This was likely originally excluded because the CGI RFC (rfc3875) does not
mention anything about the remote port of the client. However every webserver
tested does pass REMOTE_PORT down. This includes Apache 2.2, Apache 2.4,
nginx and lighttpd.

Fixes #8351

Change-Id: I4c6366cb39f0ccc05e038bd31d85f93b76e8d0c8
Reviewed-on: https://go-review.googlesource.com/1750Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Broken by e7173dfd

Fix by simply disabling the relevant tests.

* bug248 and bug345 require errchk, but we can't
  rely on perl being available.
* bug369 is disabled anyway.

Change-Id: Idf73ebccb066943e3fe17c2f662b37238ec74dfe
Reviewed-on: https://go-review.googlesource.com/2052Reviewed-by: Alex Brainman <alex.brainman@gmail.com>

Calls to goproc/deferproc used to push & pop two extra arguments,
the argument size and the function to call.  Now, we allocate space
for those arguments in the outargs section so we don't have to
modify the SP.

Defers now use the stack pointer (instead of the argument pointer)
to identify which frame they are associated with.

A followon CL might simplify funcspdelta and some of the stack
walking code.

Fixes issue #8641

Change-Id: I835ec2f42f0392c5dec7cb0fe6bba6f2aed1dad8
Reviewed-on: https://go-review.googlesource.com/1601Reviewed-by: Russ Cox <rsc@golang.org>

Change-Id: I8670540a2a9647efbd8b072a54272a04c530e54b
Reviewed-on: https://go-review.googlesource.com/2001Reviewed-by: Minux Ma <minux@golang.org>

OpenBSD 5.5 changed its kernel ABI and OpenBSD 5.6 enabled it.
This CL works on both 5.5 and 5.6.

Fixes #9102.

Change-Id: I4a295be9ab8acbc99e550d8cb7e8f8dacf3a03c5
Reviewed-on: https://go-review.googlesource.com/1932Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: Ieb305b2a4d4ef28d70a8b8ece703f495c5af0529
Reviewed-on: https://go-review.googlesource.com/2051Reviewed-by: Keith Randall <khr@golang.org>

Gccgo creates a struct to hold the arguments for the deferred
function.  In this example the struct holds a type defined in a
different package.  The bug was that gccgo tried to create an equality
function for this struct, and it implemented that function by calling
the equality function for the type defined in the other package.
Since that type is not exported, the reference to the equality
function failed at link time.  Normally it is impossible for a struct
to directly contain a member that is an unexported type from another
package, but in this specific case it was possible.  Fixed in gccgo
with https://codereview.appspot.com/183500043 .

Change-Id: I8ec3a33631225b9ac2a4ac060cb4d10b4635e60b
Reviewed-on: https://go-review.googlesource.com/1690Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Minux Ma <minux@golang.org>

Previously, this code generated bogus section indexes for dynamic
symbols.  It turns out this didn't matter, since we only emit these
when generating an executable and in an executable it only matters
whether a symbol is defined or undefined, but it leads to perplexing
code full of mysterious constants.

Unfortunately, this happens too early to put in real section indexes,
so just use section index 1 to distinguish the symbol from an
undefined symbol.

Change-Id: I0e514604bf31f21683598ebd3e020b66acf767ef
Reviewed-on: https://go-review.googlesource.com/1720Reviewed-by: Russ Cox <rsc@golang.org>

This will be used by ppc64 to add call stubs to the .text section.
ARM needs a similar pass to generate veneers for arm->thumb
transitions.

Change-Id: Iaee74036e60643a56fab15b564718f359c5910eb
Reviewed-on: https://go-review.googlesource.com/2004Reviewed-by: Russ Cox <rsc@golang.org>

Disabled by default, but invaluable when you need it.

Change-Id: If4a75d11d14f70b6840d339aaec4b940dc406493
Reviewed-on: https://go-review.googlesource.com/2012Reviewed-by: Russ Cox <rsc@golang.org>

* bug248, bug345, bug369, and bug429 were ported from bash commands to run scripts. bug369 remains disabled.
* bug395 is a test for issue 1909, which is still open. It is marked as skip now and will be usable with compile with run.go when issue 1909 is fixed.

Fixes #4139

Updates #1909

Change-Id: Ibb5fbfb5cf72ddc285829245318eeacd3fb5a636
Reviewed-on: https://go-review.googlesource.com/1774Reviewed-by: Russ Cox <rsc@golang.org>

Change-Id: Ie5a36dbcd809fc165f4198d47641d5a95878460c
Reviewed-on: https://go-review.googlesource.com/2000Reviewed-by: Russ Cox <rsc@golang.org>

For arm and powerpc, as well as x86 without aes instructions.
Contains a mixture of ideas from cityhash and xxhash.

Compared to our old fallback on ARM, it's ~no slower on
small objects and up to ~50% faster on large objects.  More
importantly, it is a much better hash function and thus has
less chance of bad behavior.

Fixes #8737

benchmark                         old ns/op     new ns/op     delta
BenchmarkHash5                    173           181           +4.62%
BenchmarkHash16                   252           212           -15.87%
BenchmarkHash64                   575           419           -27.13%
BenchmarkHash1024                 7173          3995          -44.31%
BenchmarkHash65536                516940        313173        -39.42%
BenchmarkHashStringSpeed          300           279           -7.00%
BenchmarkHashBytesSpeed           478           424           -11.30%
BenchmarkHashInt32Speed           217           207           -4.61%
BenchmarkHashInt64Speed           262           231           -11.83%
BenchmarkHashStringArraySpeed     609           631           +3.61%

Change-Id: I0a9335028f32b10ad484966e3019987973afd3eb
Reviewed-on: https://go-review.googlesource.com/1360Reviewed-by: Russ Cox <rsc@golang.org>

Pointers to zero-sized values may end up pointing to the next
object in memory, and possibly off the end of a span.  This
can cause memory leaks and/or confuse the garbage collector.

By putting the overflow pointer at the end of the bucket, we
make sure that pointers to any zero-sized keys or values don't
accidentally point to the next object in memory.

fixes #9384

Change-Id: I5d434df176984cb0210b4d0195dd106d6eb28f73
Reviewed-on: https://go-review.googlesource.com/1869Reviewed-by: Russ Cox <rsc@golang.org>

Change-Id: I3b81f2e9eb29ee6349d758b68fe7951b34f15a81
Reviewed-on: https://go-review.googlesource.com/1974Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: Icba46194bcbfd86b512eef2599242c715ad4e7d3
Reviewed-on: https://go-review.googlesource.com/2041Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

Fixes #9409

Change-Id: I2404cd8bf3ebb07f4b6a2b3e1d58ab69b9f1e8d8
Reviewed-on: https://go-review.googlesource.com/2040Reviewed-by: Andrew Gerrand <adg@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

Handles the case where the parent is pid 1 (common in docker
containers).

Attempted and failed to write a test for this.

Fixes #9263.

Change-Id: I5c6036446c99e66259a4fab1660b6a594f875020
Reviewed-on: https://go-review.googlesource.com/1372Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

Move the symMerge recursion stopping condition
from the beginning of symMerge to the callers.

This halves the number of calls to symMerge
while running 'go test sort'.

benchmark                   old ns/op      new ns/op      delta
BenchmarkStable1e6          8358117060     7954143849     -4.83%
BenchmarkStable1e4          40116117       38583285       -3.82%
BenchmarkStableInt1K        119150         115182         -3.33%
BenchmarkStableInt64K       9799845        9515475        -2.90%
BenchmarkStableString1K     388901         393516         +1.19%
BenchmarkStable1e2          124917         123618         -1.04%

Change-Id: I7ba2ca277f213b076fe6830e1139edb47ac53800
Reviewed-on: https://go-review.googlesource.com/1820Reviewed-by: Robert Griesemer <gri@golang.org>

intDataSize ignores unsigned integers, forcing reads/writes to miss the fast path.

Fixes #8956

Change-Id: Ie79b565b037db3c469aa1dc6d0a8a5a9252d5f0a
Reviewed-on: https://go-review.googlesource.com/1777Reviewed-by: Russ Cox <rsc@golang.org>

Change-Id: I15269722ca3d2654a9dd7a3f8a89ad375dc9bee0
Reviewed-on: https://go-review.googlesource.com/1759Reviewed-by: Russ Cox <rsc@golang.org>

Fixes #9407

Change-Id: I765e8009c7ee22473ac8c2d81c7f6c8ec9866c51
Reviewed-on: https://go-review.googlesource.com/1980Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>