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1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 #include <pthread.h>
3 #include <unistd.h>
4 
5 extern "C" void AnnotateRWLockAcquired(const char *f, int l, void *m, long rw);
6 
ThreadFunc(void * m)7 void *ThreadFunc(void *m) {
8   AnnotateRWLockAcquired(__FILE__, __LINE__, m, 1);
9   return 0;
10 }
11 
main()12 int main() {
13   int m = 0;
14   AnnotateRWLockAcquired(__FILE__, __LINE__, &m, 1);
15   pthread_t th;
16   pthread_create(&th, 0, ThreadFunc, &m);
17   pthread_join(th, 0);
18   return 0;
19 }
20 
21 // CHECK: WARNING: ThreadSanitizer: double lock of a mutex
22 // CHECK:     #0 AnnotateRWLockAcquired
23 // CHECK:     #1 ThreadFunc
24 // CHECK: Location is stack of main thread.
25 // CHECK:   Mutex {{.*}} created at:
26 // CHECK:     #0 AnnotateRWLockAcquired
27 // CHECK:     #1 main
28 // CHECK: SUMMARY: ThreadSanitizer: double lock of a mutex {{.*}}mutex_double_lock.cc{{.*}}ThreadFunc
29 
30