--- /dev/null	2018-03-12 09:19:30.040007636 +0100
+++ new/src/hotspot/share/runtime/interfaceSupport.hpp	2018-03-22 17:04:17.568829975 +0100
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2018, 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_RUNTIME_INTERFACESUPPORT_HPP
+#define SHARE_RUNTIME_INTERFACESUPPORT_HPP
+
+#include "runtime/safepointVerifiers.hpp"
+
+// Definitions for JRT (Java (Compiler/Shared) Runtime)
+
+// JRT_LEAF currently can be called from either _thread_in_Java or
+// _thread_in_native mode. In _thread_in_native, it is ok
+// for another thread to trigger GC. The rest of the JRT_LEAF
+// rules apply.
+class JRTLeafVerifier : public NoSafepointVerifier {
+  static bool should_verify_GC();
+ public:
+#ifdef ASSERT
+  JRTLeafVerifier();
+  ~JRTLeafVerifier();
+#else
+  JRTLeafVerifier() {}
+  ~JRTLeafVerifier() {}
+#endif
+};
+
+#endif // SHARE_RUNTIME_INTERFACESUPPORT_HPP