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comparison agent/src/share/classes/sun/jvm/hotspot/memory/GenCollectedHeap.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2000-2003 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.gc_interface.*;
32 import sun.jvm.hotspot.runtime.*;
33 import sun.jvm.hotspot.types.*;
34 import sun.jvm.hotspot.utilities.*;
35
36 public class GenCollectedHeap extends SharedHeap {
37 private static CIntegerField nGensField;
38 private static long gensOffset;
39 private static AddressField genSpecsField;
40
41 private static GenerationFactory genFactory;
42
43 static {
44 VM.registerVMInitializedObserver(new Observer() {
45 public void update(Observable o, Object data) {
46 initialize(VM.getVM().getTypeDataBase());
47 }
48 });
49 }
50
51 private static synchronized void initialize(TypeDataBase db) {
52 Type type = db.lookupType("GenCollectedHeap");
53
54 nGensField = type.getCIntegerField("_n_gens");
55 gensOffset = type.getField("_gens").getOffset();
56 genSpecsField = type.getAddressField("_gen_specs");
57
58 genFactory = new GenerationFactory();
59 }
60
61 public GenCollectedHeap(Address addr) {
62 super(addr);
63 }
64
65 public int nGens() {
66 return (int) nGensField.getValue(addr);
67 }
68
69 public Generation getGen(int i) {
70 if (Assert.ASSERTS_ENABLED) {
71 Assert.that((i >= 0) && (i < nGens()), "Index " + i +
72 " out of range (should be between 0 and " + nGens() + ")");
73 }
74
75 if ((i < 0) || (i >= nGens())) {
76 return null;
77 }
78
79 Address genAddr = addr.getAddressAt(gensOffset +
80 (i * VM.getVM().getAddressSize()));
81 return genFactory.newObject(addr.getAddressAt(gensOffset +
82 (i * VM.getVM().getAddressSize())));
83 }
84
85 public boolean isIn(Address a) {
86 for (int i = 0; i < nGens(); i++) {
87 Generation gen = getGen(i);
88 if (gen.isIn(a)) {
89 return true;
90 }
91 }
92
93 return permGen().isIn(a);
94 }
95
96 public long capacity() {
97 long capacity = 0;
98 for (int i = 0; i < nGens(); i++) {
99 capacity += getGen(i).capacity();
100 }
101 return capacity;
102 }
103
104 public long used() {
105 long used = 0;
106 for (int i = 0; i < nGens(); i++) {
107 used += getGen(i).used();
108 }
109 return used;
110 }
111
112 /** Package-private access to GenerationSpecs */
113 GenerationSpec spec(int level) {
114 if (Assert.ASSERTS_ENABLED) {
115 Assert.that((level >= 0) && (level < nGens()), "Index " + level +
116 " out of range (should be between 0 and " + nGens() + ")");
117 }
118
119 if ((level < 0) || (level >= nGens())) {
120 return null;
121 }
122
123 Address ptrList = genSpecsField.getValue(addr);
124 if (ptrList == null) {
125 return null;
126 }
127 return (GenerationSpec)
128 VMObjectFactory.newObject(GenerationSpec.class,
129 ptrList.getAddressAt(level * VM.getVM().getAddressSize()));
130 }
131
132 public CollectedHeapName kind() {
133 return CollectedHeapName.GEN_COLLECTED_HEAP;
134 }
135
136 public void printOn(PrintStream tty) {
137 for (int i = 0; i < nGens(); i++) {
138 tty.print("Gen " + i + ": ");
139 getGen(i).printOn(tty);
140 tty.println("Invocations: " + getGen(i).invocations());
141 tty.println();
142 }
143 permGen().printOn(tty);
144 tty.println("Invocations: " + permGen().invocations());
145 }
146 }