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
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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/g1StringDedup.hpp"
33#include "gc/g1/heapRegionManager.hpp"
34#include "gc/shared/referenceProcessor.hpp"
35
36class G1CMBitMap;
37
38class G1FullGCPrepareTask : public G1FullGCTask {
39protected:
40 volatile bool _freed_regions;
41 HeapRegionClaimer _hrclaimer;
42
43 void set_freed_regions();
44
45public:
46 G1FullGCPrepareTask(G1FullCollector* collector);
47 void work(uint worker_id);
48 void prepare_serial_compaction();
49 bool has_freed_regions();
50
51protected:
52 class G1CalculatePointersClosure : public HeapRegionClosure {
53 protected:
54 G1CollectedHeap* _g1h;
55 G1CMBitMap* _bitmap;
56 G1FullGCCompactionPoint* _cp;
57 uint _humongous_regions_removed;
58
59 virtual void prepare_for_compaction(HeapRegion* hr);
60 void prepare_for_compaction_work(G1FullGCCompactionPoint* cp, HeapRegion* hr);
61 void free_humongous_region(HeapRegion* hr);
62 void reset_region_metadata(HeapRegion* hr);
63
64 public:
65 G1CalculatePointersClosure(G1CMBitMap* bitmap,
66 G1FullGCCompactionPoint* cp);
67
68 void update_sets();
69 bool do_heap_region(HeapRegion* hr);
70 bool freed_regions();
71 };
72
73 class G1PrepareCompactLiveClosure : public StackObj {
74 G1FullGCCompactionPoint* _cp;
75
76 public:
77 G1PrepareCompactLiveClosure(G1FullGCCompactionPoint* cp);
78 size_t apply(oop object);
79 };
80
81 class G1RePrepareClosure : public StackObj {
82 G1FullGCCompactionPoint* _cp;
83 HeapRegion* _current;
84
85 public:
86 G1RePrepareClosure(G1FullGCCompactionPoint* hrcp,
87 HeapRegion* hr) :
88 _cp(hrcp),
89 _current(hr) { }
90
91 size_t apply(oop object);
92 };
93};
94
95#endif // SHARE_GC_G1_G1FULLGCPREPARETASK_HPP
96