1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 #include "test.h"
3 #include <sys/types.h>
4 #include <sys/stat.h>
5 #include <fcntl.h>
6
7 int X;
8
Thread1(void * x)9 void *Thread1(void *x) {
10 barrier_wait(&barrier);
11 int f = open("/dev/random", O_RDONLY);
12 char buf;
13 read(f, &buf, 1);
14 close(f);
15 X = 42;
16 return NULL;
17 }
18
Thread2(void * x)19 void *Thread2(void *x) {
20 X = 43;
21 write(STDOUT_FILENO, "a", 1);
22 barrier_wait(&barrier);
23 return NULL;
24 }
25
main()26 int main() {
27 barrier_init(&barrier, 2);
28 pthread_t t[2];
29 pthread_create(&t[0], NULL, Thread1, NULL);
30 pthread_create(&t[1], NULL, Thread2, NULL);
31 pthread_join(t[0], NULL);
32 pthread_join(t[1], NULL);
33 }
34
35 // CHECK: WARNING: ThreadSanitizer: data race
36 // CHECK: Write of size 4
37 // CHECK: #0 Thread1
38 // CHECK: Previous write of size 4
39 // CHECK: #0 Thread2
40
41
42