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The Go programming language
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A race exists between the parent and child processes after a fork. The child needs to access the new M pointer passed as an argument but the parent may have already returned and clobbered it. Previously, we avoided this by saving the necessary data into registers before the rfork system call but this isn't guaranteed to work because Plan 9 makes no promises about the register state after a system call. Only the 386 kernel seems to save them. For amd64 and arm, this method won't work. We eliminate the race by allocating stack space for the scheduler goroutines (g0) in the per-process copy-on-write stack segment and by only calling rfork on the scheduler stack. LGTM=aram, 0intro, rsc R=aram, 0intro, mischief, rsc CC=golang-codereviews https://golang.org/cl/110680044 |
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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-source.html
in your web browser.
After installing Go, you can view a nicely formatted
doc/install-source.html by running godoc --http=:6060
and then visiting http://localhost:6060/doc/install/source.
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.