1 // RUN: %clangxx_tsan -O1 %s -o %t
2 // RUN: %env_tsan_opts=flush_memory_ms=1:flush_symbolizer_ms=1:memory_limit_mb=1 not %run %t 2>&1 | FileCheck %s
3 #include "test.h"
4
5 long X, Y;
6
Thread(void * arg)7 void *Thread(void *arg) {
8 __atomic_fetch_add(&X, 1, __ATOMIC_SEQ_CST);
9 barrier_wait(&barrier);
10 barrier_wait(&barrier);
11 Y = 1;
12 return &Y;
13 }
14
main()15 int main() {
16 __tsan_flush_memory();
17 barrier_init(&barrier, 2);
18 __atomic_fetch_add(&X, 1, __ATOMIC_SEQ_CST);
19 pthread_t t;
20 pthread_create(&t, NULL, Thread, NULL);
21 barrier_wait(&barrier);
22 __tsan_flush_memory();
23 // Trigger a race to test flushing of the symbolizer cache.
24 Y = 2;
25 barrier_wait(&barrier);
26 pthread_join(t, NULL);
27 __atomic_fetch_add(&X, 1, __ATOMIC_SEQ_CST);
28 // Background runtime thread should do some flushes meanwhile.
29 sleep(2);
30 __tsan_flush_memory();
31 fprintf(stderr, "DONE\n");
32 // The race may not be detected since we are doing aggressive flushes
33 // (if the state flush happens between racing accesses, tsan won't
34 // detect the race). So return 1 to make the test deterministic.
35 return 1;
36 }
37
38 // CHECK: DONE
39