1 /*
2 * Copyright (c) 2017, 2021, 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_G1FULLGCPREPARETASK_HPP
26 #define SHARE_GC_G1_G1FULLGCPREPARETASK_HPP
27
28 #include "gc/g1/g1FullGCCompactionPoint.hpp"
29 #include "gc/g1/g1FullGCScope.hpp"
30 #include "gc/g1/g1FullGCTask.hpp"
31 #include "gc/g1/g1RootProcessor.hpp"
32 #include "gc/g1/heapRegionManager.hpp"
33 #include "gc/shared/referenceProcessor.hpp"
34
35 class G1CMBitMap;
36 class G1FullCollector;
37 class SlidingForwarding;
38
39 class G1FullGCPrepareTask : public G1FullGCTask {
40 protected:
41 volatile bool _freed_regions;
42 HeapRegionClaimer _hrclaimer;
43
44 void set_freed_regions();
45
46 public:
47 G1FullGCPrepareTask(G1FullCollector* collector);
48 void work(uint worker_id);
49 void prepare_serial_compaction();
50 bool has_freed_regions();
51
52 protected:
53 class G1CalculatePointersClosure : public HeapRegionClosure {
54 private:
55 template<bool is_humongous>
56 void free_pinned_region(HeapRegion* hr);
57 protected:
58 G1CollectedHeap* _g1h;
59 G1FullCollector* _collector;
60 G1CMBitMap* _bitmap;
61 G1FullGCCompactionPoint* _cp;
62 bool _regions_freed;
63
64 bool should_compact(HeapRegion* hr);
65 void prepare_for_compaction(HeapRegion* hr);
66 void prepare_for_compaction_work(G1FullGCCompactionPoint* cp, HeapRegion* hr);
67
68 void reset_region_metadata(HeapRegion* hr);
69
70 public:
71 G1CalculatePointersClosure(G1FullCollector* collector,
72 G1FullGCCompactionPoint* cp);
73
74 bool do_heap_region(HeapRegion* hr);
75 bool freed_regions();
76 };
77
78 class G1PrepareCompactLiveClosure : public StackObj {
79 G1FullGCCompactionPoint* _cp;
80 SlidingForwarding* const _forwarding;
81
82 public:
83 G1PrepareCompactLiveClosure(G1FullGCCompactionPoint* cp);
84 size_t apply(oop object);
85 };
86
87 class G1RePrepareClosure : public StackObj {
88 G1FullGCCompactionPoint* _cp;
89 HeapRegion* _current;
90
91 public:
92 G1RePrepareClosure(G1FullGCCompactionPoint* hrcp,
93 HeapRegion* hr) :
94 _cp(hrcp),
95 _current(hr) { }
96
97 size_t apply(oop object);
98 };
99 };
100
101 #endif // SHARE_GC_G1_G1FULLGCPREPARETASK_HPP