--- /dev/null	2019-01-28 17:45:58.000000000 +0800
+++ new/src/share/vm/jfr/leakprofiler/chains/edgeUtils.hpp	2019-01-28 17:45:57.000000000 +0800
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2014, 2019, 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_LEAKPROFILER_CHAINS_EDGEUTILS_HPP
+#define SHARE_VM_LEAKPROFILER_CHAINS_EDGEUTILS_HPP
+
+#include "memory/allocation.hpp"
+
+class Edge;
+class RoutableEdge;
+class Symbol;
+
+class EdgeUtils : public AllStatic {
+ public:
+  static bool is_leak_edge(const Edge& edge);
+
+  static const Edge* root(const Edge& edge);
+  static bool is_root(const Edge& edge);
+
+  static bool is_array_element(const Edge& edge);
+  static int array_index(const Edge& edge);
+  static int array_size(const Edge& edge);
+
+  static const Symbol* field_name_symbol(const Edge& edge);
+  static jshort field_modifiers(const Edge& edge);
+
+  static void collapse_chain(const RoutableEdge& edge);
+};
+
+#endif // SHARE_VM_LEAKPROFILER_CHAINS_EDGEUTILS_HPP