1 /*
2 * Copyright (c) 2001, 2008, 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 //
26 // A PSMarkSweepDecorator is used to add "ParallelScavenge" style mark sweep operations
27 // to a MutableSpace.
28 //
29
30 class ObjectStartArray;
31
32 class PSMarkSweepDecorator: public CHeapObj {
33 private:
34 static PSMarkSweepDecorator* _destination_decorator;
35
36 protected:
37 MutableSpace* _space;
38 ObjectStartArray* _start_array;
39 HeapWord* _first_dead;
40 HeapWord* _end_of_live;
41 HeapWord* _compaction_top;
42 size_t _allowed_dead_ratio;
43
44 bool insert_deadspace(size_t& allowed_deadspace_words, HeapWord* q,
56 static void set_destination_decorator_tenured();
57 static void set_destination_decorator_perm_gen();
58 static void advance_destination_decorator();
59 static PSMarkSweepDecorator* destination_decorator();
60
61 // Accessors
62 MutableSpace* space() { return _space; }
63 ObjectStartArray* start_array() { return _start_array; }
64
65 HeapWord* compaction_top() { return _compaction_top; }
66 void set_compaction_top(HeapWord* value) { _compaction_top = value; }
67
68 size_t allowed_dead_ratio() { return _allowed_dead_ratio; }
69 void set_allowed_dead_ratio(size_t value) { _allowed_dead_ratio = value; }
70
71 // Work methods
72 void adjust_pointers();
73 void precompact();
74 void compact(bool mangle_free_space);
75 };
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1 /*
2 * Copyright (c) 2001, 2010, 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_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP
27
28 #include "gc_implementation/shared/mutableSpace.hpp"
29
30 //
31 // A PSMarkSweepDecorator is used to add "ParallelScavenge" style mark sweep operations
32 // to a MutableSpace.
33 //
34
35 class ObjectStartArray;
36
37 class PSMarkSweepDecorator: public CHeapObj {
38 private:
39 static PSMarkSweepDecorator* _destination_decorator;
40
41 protected:
42 MutableSpace* _space;
43 ObjectStartArray* _start_array;
44 HeapWord* _first_dead;
45 HeapWord* _end_of_live;
46 HeapWord* _compaction_top;
47 size_t _allowed_dead_ratio;
48
49 bool insert_deadspace(size_t& allowed_deadspace_words, HeapWord* q,
61 static void set_destination_decorator_tenured();
62 static void set_destination_decorator_perm_gen();
63 static void advance_destination_decorator();
64 static PSMarkSweepDecorator* destination_decorator();
65
66 // Accessors
67 MutableSpace* space() { return _space; }
68 ObjectStartArray* start_array() { return _start_array; }
69
70 HeapWord* compaction_top() { return _compaction_top; }
71 void set_compaction_top(HeapWord* value) { _compaction_top = value; }
72
73 size_t allowed_dead_ratio() { return _allowed_dead_ratio; }
74 void set_allowed_dead_ratio(size_t value) { _allowed_dead_ratio = value; }
75
76 // Work methods
77 void adjust_pointers();
78 void precompact();
79 void compact(bool mangle_free_space);
80 };
81
82 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP
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