1/*
2 * Copyright (c) 2014, 2019, 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_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP
26#define SHARE_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP
27
28#include "memory/iterator.hpp"
29
30class BitSet;
31class Edge;
32class EdgeStore;
33class EdgeQueue;
34
35// Class responsible for iterating the heap depth-first
36class DFSClosure : public BasicOopIterateClosure {
37 private:
38 static EdgeStore* _edge_store;
39 static BitSet* _mark_bits;
40 static const Edge*_start_edge;
41 static size_t _max_depth;
42 static bool _ignore_root_set;
43 DFSClosure* _parent;
44 const oop* _reference;
45 size_t _depth;
46
47 void add_chain();
48 void closure_impl(const oop* reference, const oop pointee);
49
50 DFSClosure* parent() const { return _parent; }
51 const oop* reference() const { return _reference; }
52
53 DFSClosure(DFSClosure* parent, size_t depth);
54 DFSClosure();
55
56 public:
57 static void find_leaks_from_edge(EdgeStore* edge_store, BitSet* mark_bits, const Edge* start_edge);
58 static void find_leaks_from_root_set(EdgeStore* edge_store, BitSet* mark_bits);
59 void do_root(const oop* ref);
60
61 virtual void do_oop(oop* ref);
62 virtual void do_oop(narrowOop* ref);
63};
64
65#endif // SHARE_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP
66