Unions break precise GC.
Update #5193.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/8368044

+untype it because it can point to different types
Update #5193.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/8454043

If for whatever reason seh points into Go heap region,
the dangling pointer will cause memory corruption during GC.
Update #5193.

R=golang-dev, alex.brainman, iant
CC=golang-dev
https://golang.org/cl/8402045

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/8437043

Fixes #5226.

R=golang-dev, minux.ma, iant
CC=golang-dev
https://golang.org/cl/8320044

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/8441045

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/8429045

The offset of an embedded field s.X must be relative to s
and not to the implicit s.Field of which X is a direct field.
Moreover, no indirections may happen on the path.

Fixes #4909.

R=nigeltao, ality, daniel.morsing, iant, gri, r
CC=golang-dev
https://golang.org/cl/8287043

Makes finding the relevant information much easier.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/8353045

These no longer allocate.

R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/8340047

R=golang-dev, dvyukov, khr, cshapiro
CC=golang-dev
https://golang.org/cl/8392043

Expands the example when visiting a URL such as
http://golang.org/pkg/net/http/#example_Hijacker

Fixes #5212.

R=golang-dev, bradfitz, adg
CC=golang-dev
https://golang.org/cl/8378043

We've decided to leave logging to third-parties (there are too
many formats), which others have done.

And we can't change the behavior of the various response
fields at this point anyway. Plus I argue they're correct and
match their documention.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8391043

Motivated by a deletion in the wiki, which had a better
example.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8288045

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/8379043

Fixed example program's output to match program's code.
Fixes #5204.

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/8365043

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/8377043

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/8248044

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/8357043

R=r, minux.ma, bradfitz
CC=golang-dev
https://golang.org/cl/8304043

R=r
CC=golang-dev
https://golang.org/cl/8301044

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/8343046

Also, don't build the tour when making the source distribution.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/8354043

R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/8342046

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/8343045

The compilers used to generate only one 'm' symbol
to record the stack frame size for each function.

In cmd/nm, the 'm' and 'f' symbols are handled in
the same switch case with a special exception for
the symbol described above called ".frame".

Now that the compilers emit additional 'm' symbols
for precise garbage collection of the stack, the
current logic is incorrect. cmd/nm will attempt to
interpret these new 'm' symbols as 'f' symbols and
add them to the file name index table.

This fails with an out-of-memory condition when
zenter encounters an 'm' symbol with a very large
value (usually the .args symbol indicating a
variadic NOSPLIT function).

R=iant
CC=dave, gobot, golang-dev, rsc
https://golang.org/cl/7962045

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/8350044

Fixes 5164.

R=golang-dev, iant, adg
CC=golang-dev
https://golang.org/cl/8119049

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/8342044

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/8285044

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/8351043

Fixes #5175.
Race detector runtime expects values passed to MapShadow() to be page-aligned,
because they are used in mmap() call. If they are not aligned mmap() trims
either beginning or end of the mapping.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8325043

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8344043

This version just tells you what to do, rather
than trying to teach you how it all works.
Should be much better for newcomers.

R=dave, gary.burd, alcosholik, r
CC=golang-dev
https://golang.org/cl/8247044

Fixes #4596.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8327045

Also:
- put GORACE into the go env command
- do minor housekeeping on the race detector article

Fixes #4995.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/8319044

Fixes #5053.

R=adg, iant
CC=golang-dev
https://golang.org/cl/8337043

- comment fixes
- s/z/x/ in (*rat).Float64 to match convention for functions
  returning a non-*Rat
- minor test output tweaking

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8327044

See https://github.com/raggi/go-and-java for runtime benchmark.

The patch reduces the amount of map key search, moving connection oriented
variables onto the connection structs.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/8092045

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/8253044