blob: 3b9fe62ae2bc9f637fc068493cee992cdac3f578 (
plain)
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
39
40
41
42
43
44
45
46
47
|
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <sched.h>
struct Cache {
int x;
};
Cache g_cache;
Cache *CreateCache() {
g_cache.x = rand();
return &g_cache;
}
_Atomic(Cache*) queue;
void *Thread1(void *x) {
static Cache *c = CreateCache();
__c11_atomic_store(&queue, c, 0);
return 0;
}
void *Thread2(void *x) {
Cache *c = 0;
for (;;) {
c = __c11_atomic_load(&queue, 0);
if (c)
break;
sched_yield();
}
if (c->x >= RAND_MAX)
exit(1);
return 0;
}
int main() {
pthread_t t[2];
pthread_create(&t[0], 0, Thread1, 0);
pthread_create(&t[1], 0, Thread2, 0);
pthread_join(t[0], 0);
pthread_join(t[1], 0);
}
// CHECK: WARNING: ThreadSanitizer: data race
|
