--- /dev/null	2018-04-20 00:47:32.000000000 +0100
+++ new/src/hotspot/share/runtime/continuation.hpp	2018-04-20 00:47:31.000000000 +0100
@@ -0,0 +1,49 @@
+/*
+ * 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_VM_RUNTIME_CONTINUATION_HPP
+#define SHARE_VM_RUNTIME_CONTINUATION_HPP
+
+#include "runtime/globals.hpp"
+
+// The order of this struct matters as it's directly manipulated by assembly code (push/pop)
+struct FrameInfo {
+  address pc;
+  address fp;
+  address sp;
+};
+
+class Continuation : AllStatic {
+public:
+  static void freeze(JavaThread* thread, FrameInfo* fi, oop scope);
+  static int prepare_thaw(FrameInfo* fi, int num_frames);
+  static void thaw(FrameInfo* fi, int num_frames);
+
+  static bool is_cont_bottom_frame(const frame& f);
+  static frame fix_continuation_bottom_sender(const frame& callee, frame f, RegisterMap* map);
+};
+
+void CONT_RegisterNativeMethods(JNIEnv *env, jclass cls);
+
+#endif // SHARE_VM_RUNTIME_CONTINUATION_HPP