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
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