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b0db472ea2
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Russ Cox b0db472ea2 cmd/5l, runtime: make ARM integer division profiler-friendly 
The implementation of division constructed non-standard
stack frames that could not be handled by the traceback
routines.

CL 13239052 left the frames non-standard but fixed them
for the specific case of a divide-by-zero panic.
A profiling signal can arrive at any time, so that fix
is not sufficient.

Change the division to store the extra argument in the M struct
instead of in a new stack slot. That keeps the frames bog standard
at all times.

Also fix a related bug in the traceback code: when starting
a traceback, the LR register should be ignored if the current
function has already allocated its stack frame and saved the
original LR on the stack. The stack copy should be used, as the
LR register may have been modified.

Combined, these make the torture test from issue 6681 pass.

Fixes #6681.

R=golang-dev, r, josharian
CC=golang-dev
https://golang.org/cl/19810043
2013-10-30 18:50:34 +00:00
api api: add go1.2.txt, use in tests 2013-10-18 13:36:59 +09:00
doc doc/go1.2.html: delete repeated word 2013-10-30 09:39:20 -07:00
include build: remove various uses of C undefined behavior 2013-09-09 15:07:23 -04:00
lib plan9: correct create permissions with union directory 2013-10-23 10:28:28 -04:00
misc undo CL 19010044 / dbcd720e5396 2013-10-29 22:17:14 -04:00
src cmd/5l, runtime: make ARM integer division profiler-friendly 2013-10-30 18:50:34 +00:00
test test/mapnan: use time.Now instead of syscall.Getrusage 2013-10-22 18:33:37 -04:00
.hgignore build: ignore new zfiles, delete temp goplay binary in run.bash 2013-08-02 19:14:13 -07:00
.hgtags tag go1.2rc2 2013-10-18 14:01:00 +09:00
AUTHORS A+C: Jakob Borg (individual CLA). 2013-10-30 09:27:02 +11:00
CONTRIBUTORS A+C: Jakob Borg (individual CLA). 2013-10-30 09:27:02 +11:00
favicon.ico godoc: update favicon 2012-10-11 17:02:36 +11:00
LICENSE doc: update licensing text one more time 2012-03-27 15:09:13 +11:00
PATENTS
README
robots.txt godoc: serve robots.txt raw 2011-02-19 05:46:20 +11:00

README 

This is the source code repository for the Go programming language.  

For documentation about how to install and use Go,
visit http://golang.org/ or load doc/install.html in your web browser.

After installing Go, you can view a nicely formatted
doc/install.html by running godoc --http=:6060
and then visiting http://localhost:6060/doc/install.html.

Unless otherwise noted, the Go source files are distributed
under the BSD-style license found in the LICENSE file.

--

Binary Distribution Notes

If you have just untarred a binary Go distribution, you need to set
the environment variable $GOROOT to the full path of the go
directory (the one containing this README).  You can omit the
variable if you unpack it into /usr/local/go, or if you rebuild
from sources by running all.bash (see doc/install.html).
You should also add the Go binary directory $GOROOT/bin
to your shell's path.

For example, if you extracted the tar file into $HOME/go, you might
put the following in your .profile:

    export GOROOT=$HOME/go
    export PATH=$PATH:$GOROOT/bin

See doc/install.html for more details.