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
8pthread_mutex_t m;
9int x;
10
11void *thr(void *p) {
12  pthread_mutex_lock(&m);
13  x = 42;
14  return 0;
15}
16
17int 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