author | coleenp |
Thu, 10 Jan 2019 15:13:51 -0500 | |
changeset 53244 | 9807daeb47c4 |
parent 50752 | 9d62da00bf15 |
child 55571 | 49102ba8cf14 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP |
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#define SHARE_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP |
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#include "memory/iterator.hpp" |
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#include "oops/oop.hpp" |
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class BitSet; |
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class Edge; |
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class EdgeStore; |
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class EdgeQueue; |
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// Class responsible for iterating the heap breadth-first |
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class BFSClosure : public BasicOopIterateClosure { |
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private: |
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EdgeQueue* _edge_queue; |
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EdgeStore* _edge_store; |
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BitSet* _mark_bits; |
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const Edge* _current_parent; |
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mutable size_t _current_frontier_level; |
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mutable size_t _next_frontier_idx; |
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mutable size_t _prev_frontier_idx; |
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size_t _dfs_fallback_idx; |
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bool _use_dfs; |
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void log_completed_frontier() const; |
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void log_dfs_fallback() const; |
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bool is_complete() const; |
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void step_frontier() const; |
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void closure_impl(const oop* reference, const oop pointee); |
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void add_chain(const oop* reference, const oop pointee); |
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void dfs_fallback(); |
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void iterate(const Edge* parent); |
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void process(const oop* reference, const oop pointee); |
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void process_root_set(); |
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void process_queue(); |
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public: |
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BFSClosure(EdgeQueue* edge_queue, EdgeStore* edge_store, BitSet* mark_bits); |
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void process(); |
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virtual void do_oop(oop* ref); |
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virtual void do_oop(narrowOop* ref); |
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}; |
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#endif // SHARE_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP |