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      1 // RUN: %clangxx_tsan %s -o %t
      2 // RUN: %run %t 2>&1 | FileCheck %s
      3 
      4 // bench.h needs pthread barriers which are not available on OS X
      5 // UNSUPPORTED: darwin
      6 
      7 #include "bench.h"
      8 
      9 pthread_rwlock_t mtx;
     10 
     11 void thread(int tid) {
     12   for (int i = 0; i < bench_niter; i++) {
     13     pthread_rwlock_rdlock(&mtx);
     14     pthread_rwlock_unlock(&mtx);
     15   }
     16 }
     17 
     18 void bench() {
     19   pthread_rwlock_init(&mtx, 0);
     20   pthread_rwlock_wrlock(&mtx);
     21   pthread_rwlock_unlock(&mtx);
     22   pthread_rwlock_rdlock(&mtx);
     23   pthread_rwlock_unlock(&mtx);
     24   start_thread_group(bench_nthread, thread);
     25 }
     26 
     27 // CHECK: DONE
     28 
     29