1 /*
   2  * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_LEAKPROFILER_CHAINS_EDGEUTILS_HPP
  26 #define SHARE_VM_LEAKPROFILER_CHAINS_EDGEUTILS_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 
  30 class Edge;
  31 class Symbol;
  32 
  33 class EdgeUtils : public AllStatic {
  34  public:
  35   static const size_t leak_context = 100;
  36   static const size_t root_context = 100;
  37   static const size_t max_ref_chain_depth = leak_context + root_context;
  38 
  39   static bool is_leak_edge(const Edge& edge);
  40   static const Edge* root(const Edge& edge);
  41   static const Edge* ancestor(const Edge& edge, size_t distance);
  42 
  43   static bool is_array_element(const Edge& edge);
  44   static int array_index(const Edge& edge);
  45   static int array_size(const Edge& edge);
  46 
  47   static const Symbol* field_name_symbol(const Edge& edge);
  48   static jshort field_modifiers(const Edge& edge);
  49 };
  50 
  51 #endif // SHARE_VM_LEAKPROFILER_CHAINS_EDGEUTILS_HPP