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// Copyright 2023 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 failed when run under the C/C++ ThreadSanitizer.
//
// cgocallback on a new thread calls into runtime.needm -> _cgo_getstackbound
// to update gp.stack.lo with the stack bounds. If the G itself is passed to
// _cgo_getstackbound, then writes to the same G can be seen on multiple
// threads (when the G is reused after thread exit). This would trigger TSAN.
/*
#include <pthread.h>
void go_callback();
static void *thr(void *arg) {
go_callback();
return 0;
}
static void foo() {
pthread_t th;
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setstacksize(&attr, 256 << 10);
pthread_create(&th, &attr, thr, 0);
pthread_join(th, 0);
}
*/
import "C"
import (
"time"
)
//export go_callback
func go_callback() {
}
func main() {
for i := 0; i < 2; i++ {
go func() {
for {
C.foo()
}
}()
}
time.Sleep(1000*time.Millisecond)
}
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