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