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1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 #include <pthread.h>
3 #include <stdlib.h>
4 #include <stdio.h>
5 #include <unistd.h>
6 #include <errno.h>
7 
8 pthread_mutex_t m;
9 int x;
10 
thr(void * p)11 void *thr(void *p) {
12   pthread_mutex_lock(&m);
13   x = 42;
14   return 0;
15 }
16 
main()17 int main() {
18   pthread_mutexattr_t a;
19   pthread_mutexattr_init(&a);
20   pthread_mutexattr_setrobust(&a, PTHREAD_MUTEX_ROBUST);
21   pthread_mutex_init(&m, &a);
22   pthread_t th;
23   pthread_create(&th, 0, thr, 0);
24   sleep(1);
25   if (pthread_mutex_trylock(&m) != EOWNERDEAD) {
26     fprintf(stderr, "not EOWNERDEAD\n");
27     exit(1);
28   }
29   x = 43;
30   pthread_join(th, 0);
31   fprintf(stderr, "DONE\n");
32 }
33 
34 // This is a false positive, tsan must not bark at the data race.
35 // But currently it does.
36 // CHECK-NOT: WARNING: ThreadSanitizer WARNING: double lock of mutex
37 // CHECK: WARNING: ThreadSanitizer: data race
38 // CHECK-NOT: EOWNERDEAD
39 // CHECK: DONE
40 // CHECK-NOT: WARNING: ThreadSanitizer
41 
42