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 x[4], z[4];
6
MemCpyThread(void * a)7 void *MemCpyThread(void *a) {
8 memcpy((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 x between memcpy and memset
23 pthread_create(&t[0], NULL, MemCpyThread, x);
24 pthread_create(&t[1], NULL, MemSetThread, x);
25 pthread_join(t[0], NULL);
26 pthread_join(t[1], NULL);
27 fprintf(stderr, "PASS\n");
28 return 0;
29 }
30
31 // CHECK: WARNING: ThreadSanitizer: data race
32 // CHECK: #0 memset
33 // CHECK: #{{[12]}} MemSetThread
34 // CHECK: Previous write
35 // CHECK: #0 {{(memcpy|memmove)}}
36 // CHECK: #{{[12]}} MemCpyThread
37