tsan: add benchmarks for synchronization handling

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@204608 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 26 insertions, 0 deletions

diff --git a/test/tsan/bench_ten_mutexes.cc b/test/tsan/bench_ten_mutexes.cc
new file mode 100644
index 000000000..994d2ac99
--- /dev/null
+++ b/test/tsan/bench_ten_mutexes.cc
@@ -0,0 +1,26 @@
+// RUN: %clangxx_tsan %s -o %t
+// RUN: %t 2>&1 | FileCheck %s
+
+#include "bench.h"
+
+const int kMutex = 10;
+pthread_mutex_t mtx[kMutex];
+
+void thread(int tid) {
+  for (int i = 0; i < bench_niter; i++) {
+    int idx = (i % kMutex);
+    if (tid == 0)
+      idx = kMutex - idx - 1;
+    pthread_mutex_lock(&mtx[idx]);
+    pthread_mutex_unlock(&mtx[idx]);
+  }
+}
+
+void bench() {
+  for (int i = 0; i < kMutex; i++)
+    pthread_mutex_init(&mtx[i], 0);
+  start_thread_group(2, thread);
+}
+
+// CHECK: DONE
+