1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/jfr/leakprofiler/chains/bfsClosure.hpp Mon Aug 12 18:30:40 2019 +0300
1.3 @@ -0,0 +1,73 @@
1.4 +/*
1.5 + * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP
1.29 +#define SHARE_VM_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP
1.30 +
1.31 +#include "memory/iterator.hpp"
1.32 +#include "oops/oop.hpp"
1.33 +
1.34 +class BitSet;
1.35 +class Edge;
1.36 +class EdgeStore;
1.37 +class EdgeQueue;
1.38 +
1.39 +// Class responsible for iterating the heap breadth-first
1.40 +class BFSClosure : public ExtendedOopClosure { // XXX BasicOopIterateClosure
1.41 + private:
1.42 + EdgeQueue* _edge_queue;
1.43 + EdgeStore* _edge_store;
1.44 + BitSet* _mark_bits;
1.45 + const Edge* _current_parent;
1.46 + mutable size_t _current_frontier_level;
1.47 + mutable size_t _next_frontier_idx;
1.48 + mutable size_t _prev_frontier_idx;
1.49 + size_t _dfs_fallback_idx;
1.50 + bool _use_dfs;
1.51 +
1.52 + void log_completed_frontier() const;
1.53 + void log_dfs_fallback() const;
1.54 +
1.55 + bool is_complete() const;
1.56 + void step_frontier() const;
1.57 +
1.58 + void closure_impl(const oop* reference, const oop pointee);
1.59 + void add_chain(const oop* reference, const oop pointee);
1.60 + void dfs_fallback();
1.61 +
1.62 + void iterate(const Edge* parent);
1.63 + void process(const oop* reference, const oop pointee);
1.64 +
1.65 + void process_root_set();
1.66 + void process_queue();
1.67 +
1.68 + public:
1.69 + BFSClosure(EdgeQueue* edge_queue, EdgeStore* edge_store, BitSet* mark_bits);
1.70 + void process();
1.71 +
1.72 + virtual void do_oop(oop* ref);
1.73 + virtual void do_oop(narrowOop* ref);
1.74 +};
1.75 +
1.76 +#endif // SHARE_VM_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP
