Mercurial > hg > graal-compiler
comparison agent/src/share/classes/sun/jvm/hotspot/memory/DefNewGeneration.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c70a245cad3a |
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-1:000000000000 | 0:a61af66fc99e |
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1 /* | |
2 * Copyright 2000-2005 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 package sun.jvm.hotspot.memory; | |
26 | |
27 import java.io.*; | |
28 import java.util.*; | |
29 | |
30 import sun.jvm.hotspot.debugger.*; | |
31 import sun.jvm.hotspot.runtime.*; | |
32 import sun.jvm.hotspot.types.*; | |
33 | |
34 /** DefNewGeneration is a young generation containing eden, from- and | |
35 to-space. */ | |
36 | |
37 public class DefNewGeneration extends Generation { | |
38 protected static AddressField edenSpaceField; | |
39 protected static AddressField fromSpaceField; | |
40 protected static AddressField toSpaceField; | |
41 | |
42 static { | |
43 VM.registerVMInitializedObserver(new Observer() { | |
44 public void update(Observable o, Object data) { | |
45 initialize(VM.getVM().getTypeDataBase()); | |
46 } | |
47 }); | |
48 } | |
49 | |
50 private static synchronized void initialize(TypeDataBase db) { | |
51 Type type = db.lookupType("DefNewGeneration"); | |
52 | |
53 edenSpaceField = type.getAddressField("_eden_space"); | |
54 fromSpaceField = type.getAddressField("_from_space"); | |
55 toSpaceField = type.getAddressField("_to_space"); | |
56 } | |
57 | |
58 public DefNewGeneration(Address addr) { | |
59 super(addr); | |
60 } | |
61 | |
62 public Generation.Name kind() { | |
63 return Generation.Name.DEF_NEW; | |
64 } | |
65 | |
66 // Accessing spaces | |
67 public EdenSpace eden() { | |
68 return (EdenSpace) VMObjectFactory.newObject(EdenSpace.class, edenSpaceField.getValue(addr)); | |
69 } | |
70 | |
71 public ContiguousSpace from() { | |
72 return (ContiguousSpace) VMObjectFactory.newObject(ContiguousSpace.class, fromSpaceField.getValue(addr)); | |
73 } | |
74 | |
75 public ContiguousSpace to() { | |
76 return (ContiguousSpace) VMObjectFactory.newObject(ContiguousSpace.class, toSpaceField.getValue(addr)); | |
77 } | |
78 | |
79 public long capacity() { return eden().capacity() + from().capacity(); /* to() is only used during scavenge */ } | |
80 public long used() { return eden().used() + from().used(); /* to() is only used during scavenge */ } | |
81 public long free() { return eden().free() + from().free(); /* to() is only used during scavenge */ } | |
82 public long contiguousAvailable() { return eden().free(); } | |
83 | |
84 public String name() { | |
85 return "default new generation"; | |
86 } | |
87 | |
88 public void spaceIterate(SpaceClosure blk, boolean usedOnly) { | |
89 blk.doSpace(eden()); | |
90 blk.doSpace(from()); | |
91 if (!usedOnly) { | |
92 blk.doSpace(to()); | |
93 } | |
94 } | |
95 | |
96 public void printOn(PrintStream tty) { | |
97 tty.print(" eden"); | |
98 eden().printOn(tty); | |
99 tty.print(" from"); | |
100 from().printOn(tty); | |
101 tty.print(" to "); | |
102 to().printOn(tty); | |
103 } | |
104 } |