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
38
| // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
#include "test.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int fd;
char buf;
void *Thread1(void *x) {
buf = 1;
barrier_wait(&barrier);
return NULL;
}
void *Thread2(void *x) {
write(fd, &buf, 1);
return NULL;
}
int main() {
barrier_init(&barrier, 2);
fd = open("/dev/null", O_WRONLY);
if (fd < 0) return 1;
pthread_t t[2];
pthread_create(&t[0], NULL, Thread1, NULL);
barrier_wait(&barrier);
pthread_create(&t[1], NULL, Thread2, NULL);
pthread_join(t[0], NULL);
pthread_join(t[1], NULL);
close(fd);
}
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK: Read of size 1
// CHECK: #0 write
// CHECK: Previous write of size 1
// CHECK: #0 Thread1
|