src/compiler-rt/test/tsan/bench_local_mutex.cc

   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
  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
  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