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_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP 26 #define SHARE_VM_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP 27 28 #include "memory/iterator.hpp" 29 30 class BitSet; 31 class Edge; 32 class EdgeStore; 33 class EdgeQueue; 34 35 // Class responsible for iterating the heap depth-first 36 class DFSClosure : public ExtendedOopClosure { // XXX 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_VM_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP