Don't generate TLS sections on OpenBSD.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8059043

Avoid generating TLS relocations on OpenBSD.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7641055

R=golang-dev, bradfitz, r
CC=golang-dev
https://golang.org/cl/8051044

There was another bufio.Writer not being reused, found with
GOGC=off and -test.memprofile.

benchmark                               old ns/op    new ns/op    delta
BenchmarkServerFakeConnWithKeepAlive        18270        16046  -12.17%

benchmark                              old allocs   new allocs    delta
BenchmarkServerFakeConnWithKeepAlive           38           36   -5.26%

benchmark                               old bytes    new bytes    delta
BenchmarkServerFakeConnWithKeepAlive         4598         2488  -45.89%

Update #5100

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/8038047

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8046043

This CL was written by rsc.  I just tweaked 8l.

This CL adds TLS relocation to the ELF .o file we write during external linking,
so that the host linker (gcc) can decide the final location of m and g.

Similar relocations are not necessary on OS X because we use an alternate
program start-time mechanism to acquire thread-local storage.

Similar relocations are not necessary on ARM or Plan 9 or Windows
because external linking mode is not yet supported on those systems.

On almost all ELF systems, the references we use are like %fs:-0x4 or %gs:-0x4,
which we write in 6a/8a as -0x4(FS) or -0x4(GS). On Linux/ELF, however,
Xen's lack of support for this mode forced us long ago to use a two-instruction
sequence: first we load %gs:0x0 into a register r, and then we use -0x4(r).
(The ELF program loader arranges that %gs:0x0 contains a regular pointer to
that same memory location.) In order to relocate those -0x4(r) references,
the linker must know where they are. This CL adds the equivalent notation
-0x4(r)(GS*1) for this purpose: it assembles to the same encoding as -0x4(r)
but the (GS*1) indicates to the linker that this is one of those thread-local
references that needs relocation.

Thanks to Elias Naur for reminding me about this missing piece and
also for writing the test.

R=r
CC=golang-dev
https://golang.org/cl/7891047

Fixes race builder.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/8055045

The remaining issues are about runtime and sync package
instrumentation.

Update #4228

R=dvyukov, bradfitz
CC=golang-dev
https://golang.org/cl/8041043

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7635049

And make it have more useful output on failure.

Update #5005

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8016046

Since fp->symsz includes the size of the header
in the new symbol table format, we were reading
past the end and decoding a few garbage symbols
from data in the pc/line table.

R=rsc, r
CC=golang-dev
https://golang.org/cl/7993043

Seems to have been omitted before.

R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/7749049

- convert all formatters that require a *token.FileSet to
  consistenly use a *PageInfo as first argument instead
- adjust templates correspondingly
- fix outstanding bug from previous CL 8005044

Going forward, with this change the affected functions have
access to the full page "context" (PageInfo), not just the
respective file set. This will permit better context-dependent
formatting in the future.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7860049

The gofmt function was returning a string, which isn't the right type.
Three cheers for dynamic typing.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7917044

A HMUL node appears in some constant divisions, but
to observe a false negative in race detector the divisor must be
suitably chosen to make sure the only memory access is
done for HMUL.

R=dvyukov
CC=golang-dev
https://golang.org/cl/7935045

Always use /home/you for $HOME in examples.

Trivial enough that someone else can integrate this change if they are editing go1.1.html

R=r
CC=golang-dev
https://golang.org/cl/8025043

For Go 1.1, stop checking the rlimit, because it broke now
that mheap is allocated using SysAlloc.  See issue 5049.

R=r
CC=golang-dev
https://golang.org/cl/7741050

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8005044

ArrayOf will remain unexported (and therefore unused) for Go 1.1.

Fixes #4375.

R=0xe2.0x9a.0x9b, r, iant
CC=golang-dev
https://golang.org/cl/7716048

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7835049

The arm gentraceback mishandled frame linkage values pointing
to the assembly return function.  This function is special as
its frame size is zero and it contains only one instruction.
These conditions would preserve the frame pointer and result
in an off by one error when unwinding the caller.

Fixes #5124

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/8023043

The changes are almost completely self-contained
in the new file linkify.go. The other changes are
minimal and should not disturb the currently
working godoc, in anticipation of Go 1.1.

To disable the feature in case of problems, set
-links=false.

Fixes #2063.

R=adg, r
CC=golang-dev
https://golang.org/cl/7883044

Aids godoc.

R=golang-dev, gri, bradfitz
CC=golang-dev
https://golang.org/cl/7992044

Mild adaptation of rsc's 8021043, which I was unable to clpatch.
(rsc is offline)

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7741049

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7725049

Prevents storm of error messages if something goes wrong.
In the case of issue 5073 the epoll fd was closed by the test.
Update #5073.

R=golang-dev, r, rsc
CC=golang-dev
https://golang.org/cl/7966043

This CL avoids test data sharing in repetitive test runs;
e.g., go test net -cpu=1,1,1

R=golang-dev, fullung, bradfitz
CC=golang-dev
https://golang.org/cl/8011043

Handle interface comparison correctly,
add a few more tests, mark more nodes as impossible.

R=dvyukov, golang-dev
CC=golang-dev
https://golang.org/cl/7942045

Fixes #5119.

R=golang-dev, dvyukov, dave, rsc
CC=golang-dev
https://golang.org/cl/7838050

R=dsymonds
CC=golang-dev
https://golang.org/cl/7757043

Fixes issue with go test -cpu=1,1

R=minux.ma, bradfitz, nigeltao
CC=golang-dev
https://golang.org/cl/7808045

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7475048

Make the copy directly in the convert switch instead of an extra loop.
Also stops converting nil-[]byte to zero-[]byte when assigning to *interface

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7962044

R=golang-dev, adg, bradfitz
CC=golang-dev
https://golang.org/cl/7696045

Fixes #5127

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/8011044

Fixes #5046

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8016044

At some point in the past, I believe the GCD algorithm was setting d to
be negative. The RSA code has been correcting that ever since but, now,
it appears to have changed and the correction isn't needed.

Having d be too large is harmless, it's just a little odd and I
happened to notice.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7948044

Fixes SWIG callbacks.  Previously crosscall2 was only
cgo_export_static, despite the use of two #pragma declarations
in runtime/cgo/callbacks.c.

R=golang-dev, bradfitz, rsc
CC=golang-dev
https://golang.org/cl/7817048

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7812050

This keeps the logic about how to set the thread-local variables
m and g in code compiled and linked by the gc toolchain,
an important property for upcoming cgo changes.

It's also just a nice cleanup: one less place to update when
these details change.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7560048