1 // RUN: %clangxx_tsan %s -o %t
2 // RUN:                                 not %run %t 2>&1 | FileCheck %s
3 // RUN: %env_tsan_opts=detect_deadlocks=1 not %run %t 2>&1 | FileCheck %s
4 // RUN: %env_tsan_opts=detect_deadlocks=0     %run %t 2>&1 | FileCheck %s --check-prefix=DISABLED
5 // RUN: echo "deadlock:main" > %t.supp
6 // RUN: %env_tsan_opts=suppressions='%t.supp' %run %t 2>&1 | FileCheck %s --check-prefix=DISABLED
7 // RUN: echo "deadlock:zzzz" > %t.supp
8 // RUN: %env_tsan_opts=suppressions='%t.supp' not %run %t 2>&1 | FileCheck %s
9 #include <pthread.h>
10 #include <stdio.h>
11 
main()12 int main() {
13   pthread_mutex_t mu1, mu2;
14   pthread_mutex_init(&mu1, NULL);
15   pthread_mutex_init(&mu2, NULL);
16 
17   // mu1 => mu2
18   pthread_mutex_lock(&mu1);
19   pthread_mutex_lock(&mu2);
20   pthread_mutex_unlock(&mu2);
21   pthread_mutex_unlock(&mu1);
22 
23   // mu2 => mu1
24   pthread_mutex_lock(&mu2);
25   pthread_mutex_lock(&mu1);
26   // CHECK: ThreadSanitizer: lock-order-inversion (potential deadlock)
27   // DISABLED-NOT: ThreadSanitizer
28   // DISABLED: PASS
29   pthread_mutex_unlock(&mu1);
30   pthread_mutex_unlock(&mu2);
31 
32   pthread_mutex_destroy(&mu1);
33   pthread_mutex_destroy(&mu2);
34   fprintf(stderr, "PASS\n");
35 }
36