apetushkov@9858: /*
apetushkov@9858:  * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
apetushkov@9858:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
apetushkov@9858:  *
apetushkov@9858:  * This code is free software; you can redistribute it and/or modify it
apetushkov@9858:  * under the terms of the GNU General Public License version 2 only, as
apetushkov@9858:  * published by the Free Software Foundation.
apetushkov@9858:  *
apetushkov@9858:  * This code is distributed in the hope that it will be useful, but WITHOUT
apetushkov@9858:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
apetushkov@9858:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
apetushkov@9858:  * version 2 for more details (a copy is included in the LICENSE file that
apetushkov@9858:  * accompanied this code).
apetushkov@9858:  *
apetushkov@9858:  * You should have received a copy of the GNU General Public License version
apetushkov@9858:  * 2 along with this work; if not, write to the Free Software Foundation,
apetushkov@9858:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
apetushkov@9858:  *
apetushkov@9858:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
apetushkov@9858:  * or visit www.oracle.com if you need additional information or have any
apetushkov@9858:  * questions.
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apetushkov@9858:  */
apetushkov@9858: 
apetushkov@9858: #ifndef SHARE_VM_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP
apetushkov@9858: #define SHARE_VM_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP
apetushkov@9858: 
apetushkov@9858: #include "memory/iterator.hpp"
apetushkov@9858: 
apetushkov@9858: class BitSet;
apetushkov@9858: class Edge;
apetushkov@9858: class EdgeStore;
apetushkov@9858: class EdgeQueue;
apetushkov@9858: 
apetushkov@9858: // Class responsible for iterating the heap depth-first
ddong@9885: class DFSClosure : public ExtendedOopClosure { // XXX BasicOopIterateClosure
apetushkov@9858:  private:
apetushkov@9858:   static EdgeStore* _edge_store;
apetushkov@9858:   static BitSet*    _mark_bits;
apetushkov@9858:   static const Edge*_start_edge;
apetushkov@9858:   static size_t _max_depth;
apetushkov@9858:   static bool _ignore_root_set;
apetushkov@9858:   DFSClosure* _parent;
apetushkov@9858:   const oop* _reference;
apetushkov@9858:   size_t _depth;
apetushkov@9858: 
apetushkov@9858:   void add_chain();
apetushkov@9858:   void closure_impl(const oop* reference, const oop pointee);
apetushkov@9858: 
apetushkov@9858:   DFSClosure* parent() const { return _parent; }
apetushkov@9858:   const oop* reference() const { return _reference; }
apetushkov@9858: 
apetushkov@9858:   DFSClosure(DFSClosure* parent, size_t depth);
apetushkov@9858:   DFSClosure();
apetushkov@9858: 
apetushkov@9858:  public:
apetushkov@9858:   static void find_leaks_from_edge(EdgeStore* edge_store, BitSet* mark_bits, const Edge* start_edge);
apetushkov@9858:   static void find_leaks_from_root_set(EdgeStore* edge_store, BitSet* mark_bits);
ddong@9885:   void do_root(const oop* ref);
apetushkov@9858: 
apetushkov@9858:   virtual void do_oop(oop* ref);
apetushkov@9858:   virtual void do_oop(narrowOop* ref);
apetushkov@9858: };
apetushkov@9858: 
apetushkov@9858: #endif // SHARE_VM_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP