mirror of https://github.com/golang/go.git
b88148b9a0
The CL causes misc/cgo/test to fail randomly. I suspect that the problem is the use of a division instruction in usleep, which can be called while trying to acquire an m and therefore cannot store the denominator in m. The solution to that would be to rewrite the code to use a magic multiply instead of a divide, but now we're getting pretty far off the original code. Go back to the original in preparation for a different, less efficient but simpler fix. ««« original CL description 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 »»» TBR=r CC=golang-dev https://golang.org/cl/20350043 |
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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.