1 files changed, 28 insertions, 0 deletions
diff --git a/js/src/util/NativeStack.h b/js/src/util/NativeStack.h
new file mode 100644
index 0000000000..e4217039ee
--- /dev/null
+++ b/js/src/util/NativeStack.h
@@ -0,0 +1,28 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef util_NativeStack_h
+#define util_NativeStack_h
+
+#include "mozilla/Assertions.h"  // MOZ_ASSERT
+
+#include "js/Stack.h"  // JS::NativeStackBase
+
+namespace js {
+
+extern void* GetNativeStackBaseImpl();
+
+inline JS::NativeStackBase GetNativeStackBase() {
+  JS::NativeStackBase stackBase =
+      reinterpret_cast<JS::NativeStackBase>(GetNativeStackBaseImpl());
+  MOZ_ASSERT(stackBase != 0);
+  MOZ_ASSERT(stackBase % sizeof(void*) == 0);
+  return stackBase;
+}
+
+} /* namespace js */
+
+#endif /* util_NativeStack_h */