1 /*
2 * Copyright (c) 2017, 2022, 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_G1FULLGCCOMPACTTASK_HPP
26 #define SHARE_GC_G1_G1FULLGCCOMPACTTASK_HPP
27
28 #include "gc/g1/g1FullGCCompactionPoint.hpp"
29 #include "gc/g1/g1FullGCScope.hpp"
30 #include "gc/g1/g1FullGCTask.hpp"
31 #include "gc/g1/g1HeapRegionManager.hpp"
32 #include "gc/shared/referenceProcessor.hpp"
33
34 class G1CollectedHeap;
35 class G1CMBitMap;
36 class G1FullCollector;
37
38 class G1FullGCCompactTask : public G1FullGCTask {
39 G1FullCollector* _collector;
40 HeapRegionClaimer _claimer;
41 G1CollectedHeap* _g1h;
42
43 void compact_region(HeapRegion* hr);
44 template <bool ALT_FWD>
45 void compact_humongous_obj(HeapRegion* hr);
46 void free_non_overlapping_regions(uint src_start_idx, uint dest_start_idx, uint num_regions);
47
48 template <bool ALT_FWD>
49 static void copy_object_to_new_location(oop obj);
50
51 template <bool ALT_FWD>
52 void humongous_compaction_impl();
53
54 public:
55 G1FullGCCompactTask(G1FullCollector* collector) :
56 G1FullGCTask("G1 Compact Task", collector),
57 _collector(collector),
58 _claimer(collector->workers()),
59 _g1h(G1CollectedHeap::heap()) { }
60
61 void work(uint worker_id);
62 void serial_compaction();
63 void humongous_compaction();
64
65 template <bool ALT_FWD>
66 class G1CompactRegionClosure : public StackObj {
67 G1CMBitMap* _bitmap;
68 void clear_in_bitmap(oop object);
69 public:
70 G1CompactRegionClosure(G1CMBitMap* bitmap) : _bitmap(bitmap) { }
71 size_t apply(oop object);
72 };
73 };
74
75 #endif // SHARE_GC_G1_G1FULLGCCOMPACTTASK_HPP