--- /dev/null	2014-12-01 09:12:12.387027487 +0100
+++ new/src/share/vm/memory/strongRootsScope.hpp	2015-04-02 15:31:39.131873830 +0200
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_MEMORY_STRONGROOTSSCOPE_HPP
+#define SHARE_VM_MEMORY_STRONGROOTSSCOPE_HPP
+
+#include "memory/allocation.hpp"
+
+class MarkScope : public StackObj {
+ protected:
+  bool _active;
+ public:
+  MarkScope(bool activate = true);
+  ~MarkScope();
+};
+
+// Sets up and tears down the required state for parallel root processing.
+
+class StrongRootsScope : public MarkScope {
+ public:
+  StrongRootsScope(bool activate = true);
+  ~StrongRootsScope();
+};
+
+#endif // SHARE_VM_MEMORY_STRONGROOTSSCOPE_HPP