Mercurial > hg > truffle
comparison src/share/vm/gc_implementation/g1/g1MarkSweep.hpp @ 342:37f87013dfd8
6711316: Open source the Garbage-First garbage collector
Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
author | ysr |
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date | Thu, 05 Jun 2008 15:57:56 -0700 |
parents | |
children | c18cbe5936b8 |
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1 /* | |
2 * Copyright 2001-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any 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 }; |