1 /*
2 * Copyright (c) 2001, 2007, 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 class ReferenceProcessor;
26
27 // G1MarkSweep takes care of global mark-compact garbage collection for a
28 // G1CollectedHeap using a four-phase pointer forwarding algorithm. All
29 // generations are assumed to support marking; those that can also support
30 // compaction.
31 //
32 // Class unloading will only occur when a full gc is invoked.
33
34
35 class G1MarkSweep : AllStatic {
36 friend class VM_G1MarkSweep;
37 friend class Scavenge;
38
39 public:
40
41 static void invoke_at_safepoint(ReferenceProcessor* rp,
42 bool clear_all_softrefs);
43
44 private:
45
46 // Mark live objects
47 static void mark_sweep_phase1(bool& marked_for_deopt,
48 bool clear_all_softrefs);
49 // Calculate new addresses
50 static void mark_sweep_phase2();
51 // Update pointers
52 static void mark_sweep_phase3();
53 // Move objects to new positions
54 static void mark_sweep_phase4();
55
56 static void allocate_stacks();
57 };
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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_G1_G1MARKSWEEP_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP
27
28 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
29 #include "gc_implementation/g1/heapRegion.hpp"
30 #include "memory/genMarkSweep.hpp"
31 #include "memory/generation.hpp"
32 #include "memory/universe.hpp"
33 #include "oops/markOop.hpp"
34 #include "oops/oop.hpp"
35 #include "runtime/timer.hpp"
36 #include "utilities/growableArray.hpp"
37
38 class ReferenceProcessor;
39
40 // G1MarkSweep takes care of global mark-compact garbage collection for a
41 // G1CollectedHeap using a four-phase pointer forwarding algorithm. All
42 // generations are assumed to support marking; those that can also support
43 // compaction.
44 //
45 // Class unloading will only occur when a full gc is invoked.
46
47
48 class G1MarkSweep : AllStatic {
49 friend class VM_G1MarkSweep;
50 friend class Scavenge;
51
52 public:
53
54 static void invoke_at_safepoint(ReferenceProcessor* rp,
55 bool clear_all_softrefs);
56
57 private:
58
59 // Mark live objects
60 static void mark_sweep_phase1(bool& marked_for_deopt,
61 bool clear_all_softrefs);
62 // Calculate new addresses
63 static void mark_sweep_phase2();
64 // Update pointers
65 static void mark_sweep_phase3();
66 // Move objects to new positions
67 static void mark_sweep_phase4();
68
69 static void allocate_stacks();
70 };
71
72 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP
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