1// RUN: %clangxx_tsan %s -o %t
2// RUN:                                 not %run %t 2>&1 | FileCheck %s
3// RUN: TSAN_OPTIONS=detect_deadlocks=1 not %run %t 2>&1 | FileCheck %s
4// RUN: TSAN_OPTIONS=detect_deadlocks=0     %run %t 2>&1 | FileCheck %s --check-prefix=DISABLED
5// RUN: echo "deadlock:main" > %t.sup
6// RUN: TSAN_OPTIONS="suppressions=%t.sup" %run %t 2>&1 | FileCheck %s --check-prefix=DISABLED
7// RUN: echo "deadlock:zzzz" > %t.sup
8// RUN: TSAN_OPTIONS="suppressions=%t.sup" not %run %t 2>&1 | FileCheck %s
9#include <pthread.h>
10#include <stdio.h>
11
12int 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