Mon, 12 Aug 2019 18:30:40 +0300
8223147: JFR Backport
8199712: Flight Recorder
8203346: JFR: Inconsistent signature of jfr_add_string_constant
8195817: JFR.stop should require name of recording
8195818: JFR.start should increase autogenerated name by one
8195819: Remove recording=x from jcmd JFR.check output
8203921: JFR thread sampling is missing fixes from JDK-8194552
8203929: Limit amount of data for JFR.dump
8203664: JFR start failure after AppCDS archive created with JFR StartFlightRecording
8003209: JFR events for network utilization
8207392: [PPC64] Implement JFR profiling
8202835: jfr/event/os/TestSystemProcess.java fails on missing events
Summary: Backport JFR from JDK11. Initial integration
Reviewed-by: neugens
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 */
25 #ifndef SHARE_VM_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP
26 #define SHARE_VM_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP
28 #include "memory/iterator.hpp"
29 #include "oops/oop.hpp"
31 class BitSet;
32 class Edge;
33 class EdgeStore;
34 class EdgeQueue;
36 // Class responsible for iterating the heap breadth-first
37 class BFSClosure : public ExtendedOopClosure { // XXX BasicOopIterateClosure
38 private:
39 EdgeQueue* _edge_queue;
40 EdgeStore* _edge_store;
41 BitSet* _mark_bits;
42 const Edge* _current_parent;
43 mutable size_t _current_frontier_level;
44 mutable size_t _next_frontier_idx;
45 mutable size_t _prev_frontier_idx;
46 size_t _dfs_fallback_idx;
47 bool _use_dfs;
49 void log_completed_frontier() const;
50 void log_dfs_fallback() const;
52 bool is_complete() const;
53 void step_frontier() const;
55 void closure_impl(const oop* reference, const oop pointee);
56 void add_chain(const oop* reference, const oop pointee);
57 void dfs_fallback();
59 void iterate(const Edge* parent);
60 void process(const oop* reference, const oop pointee);
62 void process_root_set();
63 void process_queue();
65 public:
66 BFSClosure(EdgeQueue* edge_queue, EdgeStore* edge_store, BitSet* mark_bits);
67 void process();
69 virtual void do_oop(oop* ref);
70 virtual void do_oop(narrowOop* ref);
71 };
73 #endif // SHARE_VM_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP