Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/compiler-rt/test/tsan/Darwin/external-noninstrumented-module.cc

@@ -0,0 +1,27 @@
+// This file is used from other tests.
+// RUN: true
+
+#include <thread>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+struct MyObject;
+typedef MyObject *MyObjectRef;
+extern "C" {
+  void InitializeLibrary();
+  MyObject *ObjectCreate();
+  long ObjectRead(MyObject *);
+  void ObjectWrite(MyObject *, long);
+  void ObjectWriteAnother(MyObject *, long);
+}
+
+extern "C" void NonInstrumentedModule() {
+  InitializeLibrary();
+  
+  MyObjectRef ref = ObjectCreate();
+  std::thread t1([ref]{ ObjectWrite(ref, 42); });
+  std::thread t2([ref]{ ObjectWrite(ref, 43); });
+  t1.join();
+  t2.join();
+}