compiler-rt/test/tsan/vptr_harmful_race2.cpp

   1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
   2 #include "test.h"
   3 #include <semaphore.h>
   4
   5 struct A {
   6   A() {
   7     sem_init(&sem_, 0, 0);
   8   }
   9   virtual void F() {
  10   }
  11   void Done() {
  12     sem_post(&sem_);
  13   }
  14   virtual ~A() {
  15     sem_wait(&sem_);
  16     sem_destroy(&sem_);
  17   }
  18   sem_t sem_;
  19 };
  20
  21 struct B : A {
  22   virtual void F() {
  23   }
  24   virtual ~B() { }
  25 };
  26
  27 static A *obj = new B;
  28
  29 void *Thread1(void *x) {
  30   obj->F();
  31   barrier_wait(&barrier);
  32   obj->Done();
  33   return NULL;
  34 }
  35
  36 void *Thread2(void *x) {
  37   barrier_wait(&barrier);
  38   delete obj;
  39   return NULL;
  40 }
  41
  42 int main() {
  43   barrier_init(&barrier, 2);
  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