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
|
// RUN: %clangxx_tsan -O1 --std=c++11 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
#include "custom_mutex.h"
// Test that failed TryLock does not induce parasitic synchronization.
Mutex mu(true, 0);
long data;
void *thr(void *arg) {
mu.Lock();
data++;
mu.Unlock();
mu.Lock();
barrier_wait(&barrier);
barrier_wait(&barrier);
mu.Unlock();
return 0;
}
int main() {
barrier_init(&barrier, 2);
pthread_t th;
pthread_create(&th, 0, thr, 0);
barrier_wait(&barrier);
if (mu.TryLock()) {
fprintf(stderr, "TryLock succeeded, should not\n");
exit(0);
}
data++;
barrier_wait(&barrier);
pthread_join(th, 0);
fprintf(stderr, "DONE\n");
return 0;
}
// CHECK: ThreadSanitizer: data race
// CHECK-NEXT: Write of size 8 at {{.*}} by main thread:
// CHECK-NEXT: #0 main {{.*}}custom_mutex1.cc:29
// CHECK: DONE
|
