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 | |
7 | void *MemCpyThread(void *a) { |
8 | memcpy(dest: (int*)a, src: z, n: 16); |
9 | barrier_wait(barrier: &barrier); |
10 | return NULL; |
11 | } |
12 | |
13 | void *MemSetThread(void *a) { |
14 | barrier_wait(barrier: &barrier); |
15 | memset(s: (int*)a, c: 0, n: 16); |
16 | return NULL; |
17 | } |
18 | |
19 | int main() { |
20 | barrier_init(barrier: &barrier, count: 2); |
21 | pthread_t t[2]; |
22 | // Race on x between memcpy and memset |
23 | pthread_create(newthread: &t[0], NULL, start_routine: MemCpyThread, arg: x); |
24 | pthread_create(newthread: &t[1], NULL, start_routine: MemSetThread, arg: x); |
25 | pthread_join(th: t[0], NULL); |
26 | pthread_join(th: t[1], NULL); |
27 | fprintf(stderr, format: "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 {{.*mem(cpy|move)}} |
36 | // CHECK: #{{[12]}} MemCpyThread |
37 | |