mirror of
https://github.com/golang/go
synced 2024-11-17 15:54:39 -07:00
56 lines
941 B
Go
56 lines
941 B
Go
|
// 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.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
// This program produced false race reports when run under the C/C++
|
||
|
|
// ThreadSanitizer, as it did not understand the synchronization in
|
||
|
|
// the Go code.
|
||
|
|
|
||
|
|
/*
|
||
|
|
#cgo CFLAGS: -fsanitize=thread
|
||
|
|
#cgo LDFLAGS: -fsanitize=thread
|
||
|
|
|
||
|
|
extern void GoRun(void);
|
||
|
|
|
||
|
|
// Yes, you can have definitions if you use //export, as long as they are weak.
|
||
|
|
|
||
|
|
int val __attribute__ ((weak));
|
||
|
|
|
||
|
|
int run(void) __attribute__ ((weak));
|
||
|
|
|
||
|
|
int run() {
|
||
|
|
val = 1;
|
||
|
|
GoRun();
|
||
|
|
return val;
|
||
|
|
}
|
||
|
|
|
||
|
|
void setVal(int) __attribute__ ((weak));
|
||
|
|
|
||
|
|
void setVal(int i) {
|
||
|
|
val = i;
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
import "C"
|
||
|
|
|
||
|
|
import "runtime"
|
||
|
|
|
||
|
|
//export GoRun
|
||
|
|
func GoRun() {
|
||
|
|
runtime.LockOSThread()
|
||
|
|
c := make(chan bool)
|
||
|
|
go func() {
|
||
|
|
runtime.LockOSThread()
|
||
|
|
C.setVal(2)
|
||
|
|
c <- true
|
||
|
|
}()
|
||
|
|
<-c
|
||
|
|
}
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
if v := C.run(); v != 2 {
|
||
|
|
panic(v)
|
||
|
|
}
|
||
|
|
}
|