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
|
// RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
#include "test.h"
pthread_mutex_t Mtx;
int Global;
void *Thread2(void *x) {
barrier_wait(&barrier);
// 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:[[@LINE+1]]{{(:3)?}} ({{.*}})
pthread_mutex_lock(&Mtx);
Global = 43;
pthread_mutex_unlock(&Mtx);
return NULL;
}
void *Thread1(void *x) {
// CHECK: Previous write of size {{[0-9]+}} at {{.*}} by thread T1:
// CHECK: #{{[0-9]+}} {{.*}}pthread_mutex_init {{.*}} ({{.*}})
// CHECK-NEXT: #{{[0-9]+}} Thread1{{.*}} {{.*}}race_on_mutex.c:[[@LINE+1]]{{(:3)?}} ({{.*}})
pthread_mutex_init(&Mtx, 0);
pthread_mutex_lock(&Mtx);
Global = 42;
pthread_mutex_unlock(&Mtx);
barrier_wait(&barrier);
return NULL;
}
int main() {
barrier_init(&barrier, 2);
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;
}
|
