mirror of
https://github.com/golang/go
synced 2024-11-18 14:44:41 -07:00
50 lines
817 B
Go
50 lines
817 B
Go
|
// Copyright 2016 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.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
// Check that writes to Go allocated memory, with Go synchronization,
|
||
|
|
// do not look like a race.
|
||
|
|
|
||
|
|
/*
|
||
|
|
#cgo CFLAGS: -fsanitize=thread
|
||
|
|
#cgo LDFLAGS: -fsanitize=thread
|
||
|
|
|
||
|
|
void f(char *p) {
|
||
|
|
*p = 1;
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
import "C"
|
||
|
|
|
||
|
|
import (
|
||
|
|
"runtime"
|
||
|
|
"sync"
|
||
|
|
)
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
var wg sync.WaitGroup
|
||
|
|
var mu sync.Mutex
|
||
|
|
c := make(chan []C.char, 100)
|
||
|
|
for i := 0; i < 10; i++ {
|
||
|
|
wg.Add(2)
|
||
|
|
go func() {
|
||
|
|
defer wg.Done()
|
||
|
|
for i := 0; i < 100; i++ {
|
||
|
|
c <- make([]C.char, 4096)
|
||
|
|
runtime.Gosched()
|
||
|
|
}
|
||
|
|
}()
|
||
|
|
go func() {
|
||
|
|
defer wg.Done()
|
||
|
|
for i := 0; i < 100; i++ {
|
||
|
|
p := &(<-c)[0]
|
||
|
|
mu.Lock()
|
||
|
|
C.f(p)
|
||
|
|
mu.Unlock()
|
||
|
|
}
|
||
|
|
}()
|
||
|
|
}
|
||
|
|
wg.Wait()
|
||
|
|
}
|