1 /*
2 * Copyright (c) 2017, 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_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/g1/g1FullGCOopClosures.hpp"
31 #include "gc/g1/g1FullGCScope.hpp"
32 #include "gc/shared/preservedMarks.hpp"
33 #include "gc/shared/referenceProcessor.hpp"
34 #include "gc/shared/taskqueue.hpp"
35 #include "memory/allocation.hpp"
36
37 class AbstractGangTask;
38 class G1CMBitMap;
39 class G1FullGCMarker;
40 class G1FullGCScope;
41 class G1FullGCCompactionPoint;
42 class GCMemoryManager;
43 class ReferenceProcessor;
44
45 // Subject-to-discovery closure for reference processing during Full GC. During
46 // Full GC the whole heap is subject to discovery.
47 class G1FullGCSubjectToDiscoveryClosure: public BoolObjectClosure {
48 public:
49 bool do_object_b(oop p) {
50 assert(p != NULL, "must be");
51 return true;
52 }
53 };
54
55 // The G1FullCollector holds data associated with the current Full GC.
56 class G1FullCollector : StackObj {
57 G1CollectedHeap* _heap;
58 G1FullGCScope _scope;
59 uint _num_workers;
60 G1FullGCMarker** _markers;
61 G1FullGCCompactionPoint** _compaction_points;
62 OopQueueSet _oop_queue_set;
63 ObjArrayTaskQueueSet _array_queue_set;
64 PreservedMarksSet _preserved_marks_set;
65 G1FullGCCompactionPoint _serial_compaction_point;
66 G1IsAliveClosure _is_alive;
67 ReferenceProcessorIsAliveMutator _is_alive_mutator;
68
69 static uint calc_active_workers();
70
71 G1FullGCSubjectToDiscoveryClosure _always_subject_to_discovery;
72 ReferenceProcessorSubjectToDiscoveryMutator _is_subject_mutator;
73
74 public:
75 G1FullCollector(G1CollectedHeap* heap, GCMemoryManager* memory_manager, bool explicit_gc, bool clear_soft_refs);
76 ~G1FullCollector();
77
78 void prepare_collection();
79 void collect();
80 void complete_collection();
81
82 G1FullGCScope* scope() { return &_scope; }
83 uint workers() { return _num_workers; }
84 G1FullGCMarker* marker(uint id) { return _markers[id]; }
85 G1FullGCCompactionPoint* compaction_point(uint id) { return _compaction_points[id]; }
86 OopQueueSet* oop_queue_set() { return &_oop_queue_set; }
87 ObjArrayTaskQueueSet* array_queue_set() { return &_array_queue_set; }
88 PreservedMarksSet* preserved_mark_set() { return &_preserved_marks_set; }
89 G1FullGCCompactionPoint* serial_compaction_point() { return &_serial_compaction_point; }
90 G1CMBitMap* mark_bitmap();
91 ReferenceProcessor* reference_processor();
92
93 private:
94 void phase1_mark_live_objects();
95 void phase2_prepare_compaction();
96 void phase3_adjust_pointers();
97 void phase4_do_compaction();
98
99 void restore_marks();
100 void verify_after_marking();
101
102 void run_task(AbstractGangTask* task);
103 };
104
105
106 #endif // SHARE_GC_G1_G1FULLCOLLECTOR_HPP