/
githubmirror
/
go
Обзор
Документация
Войти
/
githubmirror
/
go
Код
Запросы
0
Пакеты
0
Релизы
0
Аналитика
Безопасность
master
test/fixedbugs/issue11256.go
53 строки
1 KB
Austin Clements
runtime: always clear stack barriers on G exit
29 июн 2015, 18:02
29 июн 2015, 18:02
840965f
Код
Авторство
О чём код?
// run // Copyright 2015 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // Test that stack barriers are reset when a goroutine exits without // returning. package main import ( "runtime" "sync/atomic" "time" ) func main() { // Let the garbage collector run concurrently. runtime.GOMAXPROCS(2) var x [100][]byte for i := range x { var done int32 go func() { // Use enough stack to get stack barriers, but // not so much that we go over _FixedStack. // There's a very narrow window here on most // OSs, so we basically can't do anything (not // even a time.Sleep or a channel). var buf [1024]byte buf[0]++ for atomic.LoadInt32(&done) == 0 { runtime.Gosched() } atomic.StoreInt32(&done, 0) // Exit without unwinding stack barriers. runtime.Goexit() }() // Generate some garbage. x[i] = make([]byte, 1024*1024) // Give GC some time to install stack barriers in the G. time.Sleep(50 * time.Microsecond) atomic.StoreInt32(&done, 1) for atomic.LoadInt32(&done) == 1 { runtime.Gosched() } } }