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_VM_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP 26 #define SHARE_VM_JFR_LEAKPROFILER_CHAINS_DFSCLOSURE_HPP 27 28 #include "memory/iterator.hpp" 29 #include "oops/oop.hpp" 30 31 class BitSet; 32 class Edge; 33 class EdgeStore; 34 class EdgeQueue; 35 36 // Class responsible for iterating the heap depth-first 37 class DFSClosure: public ExtendedOopClosure { 38 private: 39 static EdgeStore* _edge_store; 40 static BitSet* _mark_bits; 41 static const Edge*_start_edge; 42 static size_t _max_depth; 43 static bool _ignore_root_set; 44 DFSClosure* _parent; 45 const oop* _reference; 46 size_t _depth; 47 48 void add_chain(); 49 void closure_impl(const oop* reference, const oop pointee); 50 51 DFSClosure* parent() const { return _parent; } 52 const oop* reference() const { return _reference; } 53 54 DFSClosure(DFSClosure* parent, size_t depth); 55 DFSClosure(); 56 57 public: 58 static void find_leaks_from_edge(EdgeStore* edge_store, BitSet* mark_bits, const Edge* start_edge); 59 static void find_leaks_from_root_set(EdgeStore* edge_store, BitSet* mark_bits); 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