1 /*
2 * Copyright (c) 2017, 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_GC_G1_G1FULLCOLLECTOR_HPP
26 #define SHARE_GC_G1_G1FULLCOLLECTOR_HPP
27
28 #include "gc/g1/g1FullGCCompactionPoint.hpp"
29 #include "gc/g1/g1FullGCMarker.hpp"
30 #include "gc/shared/preservedMarks.hpp"
31 #include "gc/shared/referenceProcessor.hpp"
32 #include "gc/shared/taskqueue.hpp"
33 #include "memory/allocation.hpp"
34
35 class AbstractGangTask;
36 class G1CMBitMap;
37 class G1FullGCMarker;
38 class G1FullGCScope;
39 class G1FullGCCompactionPoint;
40 class ReferenceProcessor;
41
42 // The G1FullCollector holds data associated with the current Full GC.
43 class G1FullCollector : StackObj {
44 G1FullGCScope* _scope;
45 uint _num_workers;
46 G1FullGCMarker** _markers;
47 G1FullGCCompactionPoint** _compaction_points;
48 G1CMBitMap* _mark_bitmap;
49 OopQueueSet _oop_queue_set;
50 ObjArrayTaskQueueSet _array_queue_set;
51 PreservedMarksSet _preserved_marks_set;
52 ReferenceProcessor* _reference_processor;
53 G1FullGCCompactionPoint _serial_compaction_point;
54
55 ReferenceProcessorIsAliveMutator _is_alive_mutator;
56
57 public:
58 G1FullCollector(G1FullGCScope* scope,
59 ReferenceProcessor* reference_processor,
60 G1CMBitMap* mark_bitmap,
61 uint workers);
62 ~G1FullCollector();
63
64 void prepare_collection();
65 void collect();
66 void complete_collection();
67
68 G1FullGCScope* scope() { return _scope; }
69 uint workers() { return _num_workers; }
70 G1FullGCMarker* marker(uint id) { return _markers[id]; }
71 G1FullGCCompactionPoint* compaction_point(uint id) { return _compaction_points[id]; }
72 G1CMBitMap* mark_bitmap() { return _mark_bitmap; }
73 OopQueueSet* oop_queue_set() { return &_oop_queue_set; }
74 ObjArrayTaskQueueSet* array_queue_set() { return &_array_queue_set; }
75 PreservedMarksSet* preserved_mark_set() { return &_preserved_marks_set; }
76 ReferenceProcessor* reference_processor() { return _reference_processor; }
77 G1FullGCCompactionPoint* serial_compaction_point() { return &_serial_compaction_point; }
78
79 private:
80 void phase1_mark_live_objects();
81 void phase2_prepare_compaction();
82 void phase3_adjust_pointers();
83 void phase4_do_compaction();
84
85 void restore_marks();
86 void verify_after_marking();
87
88 void run_task(AbstractGangTask* task);
89
90 // Prepare compaction extension support.
91 void prepare_compaction_ext();
92 void prepare_compaction_common();
93 };
94
95
96 #endif // SHARE_GC_G1_G1FULLCOLLECTOR_HPP