1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
2 #include "test.h"
3 #include <string.h>
4
5 int y[4], z[4];
6
MemMoveThread(void * a)7 void *MemMoveThread(void *a) {
8 memmove((int*)a, z, 16);
9 barrier_wait(&barrier);
10 return NULL;
11 }
12
MemSetThread(void * a)13 void *MemSetThread(void *a) {
14 barrier_wait(&barrier);
15 memset((int*)a, 0, 16);
16 return NULL;
17 }
18
main()19 int main() {
20 barrier_init(&barrier, 2);
21 pthread_t t[2];
22 // Race on y between memmove and memset
23 pthread_create(&t[0], NULL, MemMoveThread, y);
24 pthread_create(&t[1], NULL, MemSetThread, y);
25 pthread_join(t[0], NULL);
26 pthread_join(t[1], NULL);
27
28 fprintf(stderr, "PASS\n");
29 return 0;
30 }
31
32 // CHECK: WARNING: ThreadSanitizer: data race
33 // CHECK: #0 memset
34 // CHECK: #1 MemSetThread
35 // CHECK: Previous write
36 // CHECK: #0 {{(memcpy|memmove)}}
37 // CHECK: #1 MemMoveThread
38