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src/share/vm/jfr/leakprofiler/chains/dfsClosure.hpp@8e875c964f41 (annotated)

src/share/vm/jfr/leakprofiler/chains/dfsClosure.hpp

Wed, 09 Oct 2019 16:11:58 +0800

author

ddong

date

Wed, 09 Oct 2019 16:11:58 +0800

changeset 9885

8e875c964f41

parent 9858

b985cbb00e68

permissions

-rw-r--r--

8214542: JFR: Old Object Sample event slow on a deep heap in debug builds
Reviewed-by: egahlin, rwestberg

apetushkov@9858	1	/*
apetushkov@9858	2	* Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
apetushkov@9858	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
apetushkov@9858	4	*
apetushkov@9858	5	* This code is free software; you can redistribute it and/or modify it
apetushkov@9858	6	* under the terms of the GNU General Public License version 2 only, as
apetushkov@9858	7	* published by the Free Software Foundation.
apetushkov@9858	8	*
apetushkov@9858	9	* This code is distributed in the hope that it will be useful, but WITHOUT
apetushkov@9858	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
apetushkov@9858	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
apetushkov@9858	12	* version 2 for more details (a copy is included in the LICENSE file that
apetushkov@9858	13	* accompanied this code).
apetushkov@9858	14	*
apetushkov@9858	15	* You should have received a copy of the GNU General Public License version
apetushkov@9858	16	* 2 along with this work; if not, write to the Free Software Foundation,
apetushkov@9858	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
apetushkov@9858	18	*
apetushkov@9858	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
apetushkov@9858	20	* or visit www.oracle.com if you need additional information or have any
apetushkov@9858	21	* questions.
apetushkov@9858	22	*
apetushkov@9858	23	*/
apetushkov@9858	24
apetushkov@9858	25	#ifndef SHARE_VM_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP
apetushkov@9858	26	#define SHARE_VM_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP
apetushkov@9858	27
apetushkov@9858	28	#include "memory/iterator.hpp"
apetushkov@9858	29
apetushkov@9858	30	class BitSet;
apetushkov@9858	31	class Edge;
apetushkov@9858	32	class EdgeStore;
apetushkov@9858	33	class EdgeQueue;
apetushkov@9858	34
apetushkov@9858	35	// Class responsible for iterating the heap depth-first
ddong@9885	36	class DFSClosure : public ExtendedOopClosure { // XXX BasicOopIterateClosure
apetushkov@9858	37	private:
apetushkov@9858	38	static EdgeStore* _edge_store;
apetushkov@9858	39	static BitSet* _mark_bits;
apetushkov@9858	40	static const Edge*_start_edge;
apetushkov@9858	41	static size_t _max_depth;
apetushkov@9858	42	static bool _ignore_root_set;
apetushkov@9858	43	DFSClosure* _parent;
apetushkov@9858	44	const oop* _reference;
apetushkov@9858	45	size_t _depth;
apetushkov@9858	46
apetushkov@9858	47	void add_chain();
apetushkov@9858	48	void closure_impl(const oop* reference, const oop pointee);
apetushkov@9858	49
apetushkov@9858	50	DFSClosure* parent() const { return _parent; }
apetushkov@9858	51	const oop* reference() const { return _reference; }
apetushkov@9858	52
apetushkov@9858	53	DFSClosure(DFSClosure* parent, size_t depth);
apetushkov@9858	54	DFSClosure();
apetushkov@9858	55
apetushkov@9858	56	public:
apetushkov@9858	57	static void find_leaks_from_edge(EdgeStore* edge_store, BitSet* mark_bits, const Edge* start_edge);
apetushkov@9858	58	static void find_leaks_from_root_set(EdgeStore* edge_store, BitSet* mark_bits);
ddong@9885	59	void do_root(const oop* ref);
apetushkov@9858	60
apetushkov@9858	61	virtual void do_oop(oop* ref);
apetushkov@9858	62	virtual void do_oop(narrowOop* ref);
apetushkov@9858	63	};
apetushkov@9858	64
apetushkov@9858	65	#endif // SHARE_VM_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP