[sanitizer] Intercept __pthread_mutex_lock and __pthread_mutex_unlock

Reviewers: eugenis, dvyukov

Subscribers: srhines, kubamracek, llvm-commits

Differential Revision: https://reviews.llvm.org/D46793

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@332268 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 34 insertions, 0 deletions

diff --git a/test/sanitizer_common/TestCases/Linux/pthread_mutex.cc b/test/sanitizer_common/TestCases/Linux/pthread_mutex.cc
new file mode 100644
index 000000000..610958143
--- /dev/null
+++ b/test/sanitizer_common/TestCases/Linux/pthread_mutex.cc
@@ -0,0 +1,34 @@
+// RUN: %clangxx -O1 %s -o %t && %run %t
+// RUN: %clangxx -O1 -DUSE_GLIBC %s -o %t && %run %t
+// UNSUPPORTED: android
+
+#include <pthread.h>
+
+#ifdef USE_GLIBC
+extern "C" int __pthread_mutex_lock(pthread_mutex_t *__mutex);
+extern "C" int __pthread_mutex_unlock(pthread_mutex_t *__mutex);
+#define LOCK __pthread_mutex_lock
+#define UNLOCK __pthread_mutex_unlock
+#else
+#define LOCK pthread_mutex_lock
+#define UNLOCK pthread_mutex_unlock
+#endif
+
+pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
+int x;
+
+static void *Start(void *arg) {
+  LOCK(&m);
+  ++x;
+  UNLOCK(&m);
+  return nullptr;
+}
+
+int main() {
+  pthread_t threads[2] = {};
+  for (pthread_t &t : threads)
+    pthread_create(&t, 0, &Start, 0);
+  for (pthread_t &t : threads)
+    pthread_join(t, 0);
+  return 0;
+}