xref: /llvm-project/compiler-rt/test/tsan/bench_single_writer.cpp (revision bcaeed49cb063de9fe504aa29e1cadff8a7be710) 
1*bcaeed49SFangrui Song // RUN: %clangxx_tsan %s -o %t
2*bcaeed49SFangrui Song // RUN: %run %t 2>&1 | FileCheck %s
3*bcaeed49SFangrui Song 
4*bcaeed49SFangrui Song // bench.h needs pthread barriers which are not available on OS X
5*bcaeed49SFangrui Song // UNSUPPORTED: darwin
6*bcaeed49SFangrui Song 
7*bcaeed49SFangrui Song #include "bench.h"
8*bcaeed49SFangrui Song 
9*bcaeed49SFangrui Song int x;
10*bcaeed49SFangrui Song 
thread(int tid)11*bcaeed49SFangrui Song void thread(int tid) {
12*bcaeed49SFangrui Song   if (tid == 0) {
13*bcaeed49SFangrui Song     for (int i = 0; i < bench_niter; i++)
14*bcaeed49SFangrui Song       __atomic_store_n(&x, 0, __ATOMIC_RELEASE);
15*bcaeed49SFangrui Song   } else {
16*bcaeed49SFangrui Song     for (int i = 0; i < bench_niter; i++)
17*bcaeed49SFangrui Song       __atomic_load_n(&x, __ATOMIC_ACQUIRE);
18*bcaeed49SFangrui Song   }
19*bcaeed49SFangrui Song }
20*bcaeed49SFangrui Song 
bench()21*bcaeed49SFangrui Song void bench() {
22*bcaeed49SFangrui Song   start_thread_group(bench_nthread, thread);
23*bcaeed49SFangrui Song }
24*bcaeed49SFangrui Song 
25*bcaeed49SFangrui Song // CHECK: DONE
26*bcaeed49SFangrui Song 
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