blob: e663414148317b52fc49de301038b85ea6a743e5 (
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
|
// RUN: %clang_tsan -O1 %s -o %t && not %t 2>&1 | FileCheck %s
#include <pthread.h>
#include <stdio.h>
#include <stddef.h>
#include <unistd.h>
pthread_mutex_t Mtx;
int Global;
void *Thread1(void *x) {
pthread_mutex_init(&Mtx, 0);
pthread_mutex_lock(&Mtx);
Global = 42;
pthread_mutex_unlock(&Mtx);
return NULL;
}
void *Thread2(void *x) {
sleep(1);
pthread_mutex_lock(&Mtx);
Global = 43;
pthread_mutex_unlock(&Mtx);
return NULL;
}
int main() {
pthread_t t[2];
pthread_create(&t[0], NULL, Thread1, NULL);
pthread_create(&t[1], NULL, Thread2, NULL);
pthread_join(t[0], NULL);
pthread_join(t[1], NULL);
pthread_mutex_destroy(&Mtx);
return 0;
}
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK-NEXT: Atomic read of size 1 at {{.*}} by thread T2:
// CHECK-NEXT: #0 pthread_mutex_lock
// CHECK-NEXT: #1 Thread2{{.*}} {{.*}}race_on_mutex.c:20{{(:3)?}} ({{.*}})
// CHECK: Previous write of size 1 at {{.*}} by thread T1:
// CHECK-NEXT: #0 pthread_mutex_init {{.*}} ({{.*}})
// CHECK-NEXT: #1 Thread1{{.*}} {{.*}}race_on_mutex.c:11{{(:3)?}} ({{.*}})
|
