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_mutex_t *mtx;
10 const int kStride = 16;
11 
thread(int tid)12 void thread(int tid) {
13   for (int i = 0; i < bench_niter; i++) {
14     pthread_mutex_lock(&mtx[tid * kStride]);
15     pthread_mutex_unlock(&mtx[tid * kStride]);
16   }
17 }
18 
bench()19 void bench() {
20   mtx = (pthread_mutex_t*)malloc(bench_nthread * kStride * sizeof(*mtx));
21   for (int i = 0; i < bench_nthread; i++) {
22     pthread_mutex_init(&mtx[i * kStride], 0);
23     pthread_mutex_lock(&mtx[i * kStride]);
24     pthread_mutex_unlock(&mtx[i * kStride]);
25   }
26   start_thread_group(bench_nthread, thread);
27 }
28 
29 // CHECK: DONE
30 
31