compiler-rt/test/tsan/mutexset7.cpp

   1 // RUN: %clangxx_tsan %darwin_min_target_with_tls_support -O1 %s -o %t && \
   2 // RUN:   %deflake %run %t | FileCheck %s
   3 #include "test.h"
   4
   5 int Global;
   6 __thread int huge[1024*1024];
   7
   8 void *Thread1(void *x) {
   9   barrier_wait(&barrier);
  10   Global++;
  11   return NULL;
  12 }
  13
  14 void *Thread2(void *x) {
  15   pthread_mutex_t *mtx = new pthread_mutex_t;
  16   pthread_mutex_init(mtx, 0);
  17   pthread_mutex_lock(mtx);
  18   Global--;
  19   pthread_mutex_unlock(mtx);
  20   pthread_mutex_destroy(mtx);
  21   delete mtx;
  22   barrier_wait(&barrier);
  23   return NULL;
  24 }
  25
  26 int main() {
  27   barrier_init(&barrier, 2);
  28   pthread_t t[2];
  29   pthread_create(&t[0], NULL, Thread1, NULL);
  30   pthread_create(&t[1], NULL, Thread2, NULL);
  31   pthread_join(t[0], NULL);
  32   pthread_join(t[1], NULL);
  33 }
  34
  35 // CHECK: WARNING: ThreadSanitizer: data race
  36 // CHECK: Write of size 4 at {{.*}} by thread T1:
  37 // CHECK: Previous write of size 4 at {{.*}} by thread T2
  38 // CHECK:                                      (mutexes: write [[M1:M[0-9]+]]):
  39 // CHECK: Mutex [[M1]] (0x{{.*}}) created at:
  40 // CHECK:   #0 pthread_mutex_init
  41 // CHECK:   #1 Thread2