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The Go programming language
34c67eb24e
When cgo is used, runtime creates an additional M to handle callbacks on threads not created by Go. This effectively disabled deadlock detection, which is a right thing, because Go program can be blocked and only serve callbacks on external threads. This also disables deadlock detection under race detector, because it happens to use cgo. With this change the additional M is created lazily on first cgo call. So deadlock detector works for programs that import "C", "net" or "net/http/pprof" but do not use them in fact. Also fixes deadlock detector under race detector. It should be fine to create the M later, because C code can not call into Go before first cgo call, because C code does not know when Go initialization has completed. So a Go program need to call into C first either to create an external thread, or notify a thread created in global ctor that Go initialization has completed. Fixes #4973. Fixes #5475. R=golang-dev, minux.ma, iant CC=golang-dev https://golang.org/cl/9303046 |
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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.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.