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
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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/heapRegionManager.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   void compact_humongous_obj(HeapRegion* hr);
45   void free_non_overlapping_regions(uint src_start_idx, uint dest_start_idx, uint num_regions);
46 
47   static void copy_object_to_new_location(oop obj);
48 
49 public:
50   G1FullGCCompactTask(G1FullCollector* collector) :
51     G1FullGCTask("G1 Compact Task", collector),
52     _collector(collector),
53     _claimer(collector->workers()),
54     _g1h(G1CollectedHeap::heap()) { }
55 
56   void work(uint worker_id);
57   void serial_compaction();
58   void humongous_compaction();
59 
60   class G1CompactRegionClosure : public StackObj {
61     G1CMBitMap* _bitmap;
62     void clear_in_bitmap(oop object);
63   public:
64     G1CompactRegionClosure(G1CMBitMap* bitmap) : _bitmap(bitmap) { }
65     size_t apply(oop object);
66   };
67 };
68 
69 #endif // SHARE_GC_G1_G1FULLGCCOMPACTTASK_HPP