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

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2003-2005 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.util.*;
28 import sun.jvm.hotspot.debugger.*;
29 import sun.jvm.hotspot.oops.*;
30 import sun.jvm.hotspot.types.*;
31 import sun.jvm.hotspot.runtime.*;
32 import sun.jvm.hotspot.utilities.*;
33
34 public class DictionaryEntry extends sun.jvm.hotspot.utilities.HashtableEntry {
35 static {
36 VM.registerVMInitializedObserver(new Observer() {
37 public void update(Observable o, Object data) {
38 initialize(VM.getVM().getTypeDataBase());
39 }
40 });
41 }
42
43 private static synchronized void initialize(TypeDataBase db) {
44 Type type = db.lookupType("DictionaryEntry");
45 pdSetField = type.getAddressField("_pd_set");
46 loaderField = type.getOopField("_loader");
47 }
48
49 // Fields
50 private static AddressField pdSetField;
51 private static sun.jvm.hotspot.types.OopField loaderField;
52
53 // Accessors
54
55 public ProtectionDomainEntry pdSet() {
56 Address tmp = pdSetField.getValue(addr);
57 return (ProtectionDomainEntry) VMObjectFactory.newObject(
58 ProtectionDomainEntry.class, tmp);
59 }
60
61 public Oop loader() {
62 return VM.getVM().getObjectHeap().newOop(loaderField.getValue(addr));
63 }
64
65 public Klass klass() {
66 return (Klass) literal();
67 }
68
69 public DictionaryEntry(Address addr) {
70 super(addr);
71 }
72
73 public boolean equals(Symbol className, Oop classLoader) {
74 InstanceKlass ik = (InstanceKlass) klass();
75 Oop loader = loader();
76 if (! ik.getName().equals(className)) {
77 return false;
78 } else {
79 return (loader == null)? (classLoader == null) :
80 (loader.equals(classLoader));
81 }
82 }
83
84 public boolean isValidProtectionDomain(Oop protectionDomain) {
85 if (protectionDomain == null) {
86 return true;
87 } else {
88 return containsProtectionDomain(protectionDomain);
89 }
90 }
91
92 public boolean containsProtectionDomain(Oop protectionDomain) {
93 InstanceKlass ik = (InstanceKlass) klass();
94 if (protectionDomain.equals(ik.getProtectionDomain())) {
95 return true; // Succeeds trivially
96 }
97 for (ProtectionDomainEntry current = pdSet(); current != null;
98 current = current.next()) {
99 if (protectionDomain.equals(current.protectionDomain())) {
100 return true;
101 }
102 }
103 return false;
104 }
105
106 /* covariant return type :-(
107 public DictionaryEntry next() {
108 return (DictionaryEntry) super.next();
109 }
110 For now, let the caller cast it ..
111 */
112 }