8319c57890
TestFutexsleep is supposed to clean up before returning by waking up the goroutines it started and left blocked in futex sleeps. However, it currently fails at this in several ways: 1. Both the sleep and wakeup are done on the address of tt.mtx, but in both cases tt is a *local copy* of the futexsleepTest created by a loop, so the sleep and wakeup happen on completely different addresses. Fix this by making them both use the address of the global tt.mtx. 2. If the sleep happens after the wakeup (not likely, but not impossible), it won't wake up. Fix this by using the futex protocol properly: sleep if the mutex's value is 0, and set the mutex's value to non-zero before doing the wakeup. 3. If TestFutexsleep runs more than once, channels and mutex values left over from the first run will interfere with later runs. Fix this by clearing the mutex value and creating a new channel for each test and waiting for goroutines to finish before returning (lest they send their completion to the channel for the next run). As an added bonus, this test now actually tests that futex sleep/wakeup work. Previously this test would have been satisfied if futexsleep was an infinite loop and futexwakeup was a no-op. Change-Id: I1cbc6871cc9dcb8f4601b3621913bec2b79b0fc3 Reviewed-on: https://go-review.googlesource.com/18617 Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Mikio Hara <mikioh.mikioh@gmail.com> |
||
|---|---|---|
| api | ||
| doc | ||
| lib/time | ||
| misc | ||
| src | ||
| test | ||
| .gitattributes | ||
| .gitignore | ||
| AUTHORS | ||
| CONTRIBUTING.md | ||
| CONTRIBUTORS | ||
| favicon.ico | ||
| LICENSE | ||
| PATENTS | ||
| README.md | ||
| robots.txt | ||
The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
For documentation about how to install and use Go, visit https://golang.org/ or load doc/install-source.html in your web browser.
Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.
Go is the work of hundreds of contributors. We appreciate your help!
To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html
Note that we do not accept pull requests and that we use the issue tracker for bug reports and proposals only. Please ask questions on https://forum.golangbridge.org or https://groups.google.com/forum/#!forum/golang-nuts.
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 file). 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-source.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 https://golang.org/doc/install or doc/install.html for more details.