1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 #include "test.h"
3 #include <string.h>
4
5 char *data = new char[10];
6 char *data1 = new char[10];
7 char *data2 = new char[10];
8
Thread1(void * x)9 void *Thread1(void *x) {
10 static volatile int size = 1;
11 memcpy(data+5, data1, size);
12 barrier_wait(&barrier);
13 return NULL;
14 }
15
Thread2(void * x)16 void *Thread2(void *x) {
17 static volatile int size = 4;
18 barrier_wait(&barrier);
19 memcpy(data+3, data2, size);
20 return NULL;
21 }
22
main()23 int main() {
24 barrier_init(&barrier, 2);
25 print_address("addr=", 1, &data[5]);
26 pthread_t t[2];
27 pthread_create(&t[0], NULL, Thread1, NULL);
28 pthread_create(&t[1], NULL, Thread2, NULL);
29 pthread_join(t[0], NULL);
30 pthread_join(t[1], NULL);
31 return 0;
32 }
33
34 // CHECK: addr=[[ADDR:0x[0-9,a-f]+]]
35 // CHECK: WARNING: ThreadSanitizer: data race
36 // CHECK: Write of size 1 at [[ADDR]] by thread T2:
37 // CHECK: #0 {{(memcpy|memmove)}}
38 // CHECK: #{{[12]}} Thread2
39 // CHECK: Previous write of size 1 at [[ADDR]] by thread T1:
40 // CHECK: #0 {{(memcpy|memmove)}}
41 // CHECK: #{{[12]}} Thread1
42