test/tsan/mutexset1.cc

   1 // RUN: %clangxx_tsan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
   2 #include <pthread.h>
   3 #include <stdio.h>
   4 #include <unistd.h>
   5
   6 int Global;
   7 pthread_mutex_t mtx;
   8
   9 void *Thread1(void *x) {
  10   sleep(1);
  11   pthread_mutex_lock(&mtx);
  12   Global++;
  13   pthread_mutex_unlock(&mtx);
  14   return NULL;
  15 }
  16
  17 void *Thread2(void *x) {
  18   Global--;
  19   return NULL;
  20 }
  21
  22 int main() {
  23   // CHECK: WARNING: ThreadSanitizer: data race
  24   // CHECK:   Write of size 4 at {{.*}} by thread T1
  25   // CHECK:                         (mutexes: write [[M1:M[0-9]+]]):
  26   // CHECK:   Previous write of size 4 at {{.*}} by thread T2:
  27   // CHECK:   Mutex [[M1]] (0x{{.*}}) created at:
  28   // CHECK:     #0 pthread_mutex_init
  29   // CHECK:     #1 main {{.*}}/mutexset1.cc:[[@LINE+1]]
  30   pthread_mutex_init(&mtx, 0);
  31   pthread_t t[2];
  32   pthread_create(&t[0], NULL, Thread1, NULL);
  33   pthread_create(&t[1], NULL, Thread2, NULL);
  34   pthread_join(t[0], NULL);
  35   pthread_join(t[1], NULL);
  36   pthread_mutex_destroy(&mtx);
  37 }