1 /*
2 * Copyright (c) 2017, 2023, 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_G1FULLGCCOMPACTIONPOINT_HPP
26 #define SHARE_GC_G1_G1FULLGCCOMPACTIONPOINT_HPP
27
28 #include "memory/allocation.hpp"
29 #include "oops/oopsHierarchy.hpp"
30 #include "utilities/growableArray.hpp"
31 #include "utilities/pair.hpp"
32
33 class G1FullCollector;
34 class HeapRegion;
35
36 class G1FullGCCompactionPoint : public CHeapObj<mtGC> {
37 G1FullCollector* _collector;
38 HeapRegion* _current_region;
39 HeapWord* _compaction_top;
40 GrowableArray<HeapRegion*>* _compaction_regions;
41 GrowableArrayIterator<HeapRegion*> _compaction_region_iterator;
42
43 bool object_will_fit(size_t size);
44 void initialize_values();
45 void switch_region();
46 HeapRegion* next_region();
47 uint find_contiguous_before(HeapRegion* hr, uint num_regions);
48
49 public:
50 G1FullGCCompactionPoint(G1FullCollector* collector);
51 ~G1FullGCCompactionPoint();
52
53 bool has_regions();
54 bool is_initialized();
55 void initialize(HeapRegion* hr);
56 void update();
57 void forward(oop object, size_t size);
58 uint forward_humongous(HeapRegion* hr);
59 void add(HeapRegion* hr);
60 void add_humongous(HeapRegion* hr);
61
62 void remove_at_or_above(uint bottom);
63 HeapRegion* current_region();
64
65 GrowableArray<HeapRegion*>* regions();
66 };
67
68 #endif // SHARE_GC_G1_G1FULLGCCOMPACTIONPOINT_HPP