Home | History | Annotate | Download | only in tsan
      1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
      2 #include "test.h"
      3 
      4 int Global;
      5 pthread_mutex_t mtx1;
      6 pthread_mutex_t mtx2;
      7 
      8 void *Thread1(void *x) {
      9   barrier_wait(&barrier);
     10   pthread_mutex_lock(&mtx1);
     11   pthread_mutex_lock(&mtx2);
     12   Global++;
     13   pthread_mutex_unlock(&mtx2);
     14   pthread_mutex_unlock(&mtx1);
     15   return NULL;
     16 }
     17 
     18 void *Thread2(void *x) {
     19   Global--;
     20   barrier_wait(&barrier);
     21   return NULL;
     22 }
     23 
     24 int main() {
     25   barrier_init(&barrier, 2);
     26   // CHECK: WARNING: ThreadSanitizer: data race
     27   // CHECK: Write of size 4 at {{.*}} by thread T1
     28   // CHECK:               (mutexes: write [[M1:M[0-9]+]], write [[M2:M[0-9]+]]):
     29   // CHECK:   Previous write of size 4 at {{.*}} by thread T2:
     30   // CHECK:   Mutex [[M1]] (0x{{.*}}) created at:
     31   // CHECK:     #0 pthread_mutex_init
     32   // CHECK:     #1 main {{.*}}mutexset3.cc:[[@LINE+4]]
     33   // CHECK:   Mutex [[M2]] (0x{{.*}}) created at:
     34   // CHECK:     #0 pthread_mutex_init
     35   // CHECK:     #1 main {{.*}}mutexset3.cc:[[@LINE+2]]
     36   pthread_mutex_init(&mtx1, 0);
     37   pthread_mutex_init(&mtx2, 0);
     38   pthread_t t[2];
     39   pthread_create(&t[0], NULL, Thread1, NULL);
     40   pthread_create(&t[1], NULL, Thread2, NULL);
     41   pthread_join(t[0], NULL);
     42   pthread_join(t[1], NULL);
     43   pthread_mutex_destroy(&mtx1);
     44   pthread_mutex_destroy(&mtx2);
     45 }
     46