vptr_harmful_race.cc revision 2d1fdb26e458c4ddc04155c1d421bced3ba90cd0 
1// RUN: %clangxx_tsan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
2#include <pthread.h>
3#include <semaphore.h>
4#include <stdio.h>
5#include <unistd.h>
6
7struct A {
8  A() {
9    sem_init(&sem_, 0, 0);
10  }
11  virtual void F() {
12  }
13  void Done() {
14    sem_post(&sem_);
15  }
16  virtual ~A() {
17    sem_wait(&sem_);
18    sem_destroy(&sem_);
19  }
20  sem_t sem_;
21};
22
23struct B : A {
24  virtual void F() {
25  }
26  virtual ~B() { }
27};
28
29static A *obj = new B;
30
31void *Thread1(void *x) {
32  obj->F();
33  obj->Done();
34  return NULL;
35}
36
37void *Thread2(void *x) {
38  sleep(1);
39  delete obj;
40  return NULL;
41}
42
43int main() {
44  pthread_t t[2];
45  pthread_create(&t[0], NULL, Thread1, NULL);
46  pthread_create(&t[1], NULL, Thread2, NULL);
47  pthread_join(t[0], NULL);
48  pthread_join(t[1], NULL);
49}
50
51// CHECK: WARNING: ThreadSanitizer: data race on vptr
52