1 files changed, 44 insertions, 0 deletions
diff --git a/test/SemaObjCXX/warn-thread-safety-analysis.mm b/test/SemaObjCXX/warn-thread-safety-analysis.mm
new file mode 100644
index 0000000000000..262ab7d108a29
--- /dev/null
+++ b/test/SemaObjCXX/warn-thread-safety-analysis.mm
@@ -0,0 +1,44 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -Wthread-safety -Wthread-safety-beta -Wno-objc-root-class %s
+
+class __attribute__((lockable)) Lock {
+public:
+  void Acquire() __attribute__((exclusive_lock_function())) {}
+  void Release() __attribute__((unlock_function())) {}
+};
+
+class __attribute__((scoped_lockable)) AutoLock {
+public:
+  AutoLock(Lock &lock) __attribute__((exclusive_lock_function(lock)))
+  : lock_(lock) {
+    lock.Acquire();
+  }
+  ~AutoLock() __attribute__((unlock_function())) { lock_.Release(); }
+
+private:
+  Lock &lock_;
+};
+
+@interface MyInterface {
+@private
+  Lock lock_;
+  int value_;
+}
+
+- (void)incrementValue;
+- (void)decrementValue;
+
+@end
+
+@implementation MyInterface
+
+- (void)incrementValue {
+  AutoLock lock(lock_);
+  value_ += 1;
+}
+
+- (void)decrementValue {
+  lock_.Acquire(); // expected-note{{mutex acquired here}}
+  value_ -= 1;
+} // expected-warning{{mutex 'self->lock_' is still held at the end of function}}
+
+@end