|
0
|
1 /*
|
|
|
2 * Copyright 2001-2005 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.runtime.*;
|
|
|
31 import sun.jvm.hotspot.types.*;
|
|
|
32
|
|
|
33 public class SystemDictionary {
|
|
|
34 private static AddressField dictionaryField;
|
|
|
35 private static AddressField sharedDictionaryField;
|
|
|
36 private static AddressField placeholdersField;
|
|
|
37 private static AddressField loaderConstraintTableField;
|
|
|
38 private static sun.jvm.hotspot.types.OopField javaSystemLoaderField;
|
|
|
39 private static int nofBuckets;
|
|
|
40
|
|
|
41 private static sun.jvm.hotspot.types.OopField objectKlassField;
|
|
|
42 private static sun.jvm.hotspot.types.OopField classLoaderKlassField;
|
|
|
43 private static sun.jvm.hotspot.types.OopField stringKlassField;
|
|
|
44 private static sun.jvm.hotspot.types.OopField systemKlassField;
|
|
|
45 private static sun.jvm.hotspot.types.OopField threadKlassField;
|
|
|
46 private static sun.jvm.hotspot.types.OopField threadGroupKlassField;
|
|
|
47
|
|
|
48 static {
|
|
|
49 VM.registerVMInitializedObserver(new Observer() {
|
|
|
50 public void update(Observable o, Object data) {
|
|
|
51 initialize(VM.getVM().getTypeDataBase());
|
|
|
52 }
|
|
|
53 });
|
|
|
54 }
|
|
|
55
|
|
|
56 private static synchronized void initialize(TypeDataBase db) {
|
|
|
57 Type type = db.lookupType("SystemDictionary");
|
|
|
58
|
|
|
59 dictionaryField = type.getAddressField("_dictionary");
|
|
|
60 sharedDictionaryField = type.getAddressField("_shared_dictionary");
|
|
|
61 placeholdersField = type.getAddressField("_placeholders");
|
|
|
62 loaderConstraintTableField = type.getAddressField("_loader_constraints");
|
|
|
63 javaSystemLoaderField = type.getOopField("_java_system_loader");
|
|
|
64 nofBuckets = db.lookupIntConstant("SystemDictionary::_nof_buckets").intValue();
|
|
|
65
|
|
|
66 objectKlassField = type.getOopField("_object_klass");
|
|
|
67 classLoaderKlassField = type.getOopField("_classloader_klass");
|
|
|
68 stringKlassField = type.getOopField("_string_klass");
|
|
|
69 systemKlassField = type.getOopField("_system_klass");
|
|
|
70 threadKlassField = type.getOopField("_thread_klass");
|
|
|
71 threadGroupKlassField = type.getOopField("_threadGroup_klass");
|
|
|
72 }
|
|
|
73
|
|
|
74 public Dictionary dictionary() {
|
|
|
75 Address tmp = dictionaryField.getValue();
|
|
|
76 return (Dictionary) VMObjectFactory.newObject(Dictionary.class, tmp);
|
|
|
77 }
|
|
|
78
|
|
|
79 public Dictionary sharedDictionary() {
|
|
|
80 Address tmp = sharedDictionaryField.getValue();
|
|
|
81 return (Dictionary) VMObjectFactory.newObject(Dictionary.class, tmp);
|
|
|
82 }
|
|
|
83
|
|
|
84 public PlaceholderTable placeholders() {
|
|
|
85 Address tmp = placeholdersField.getValue();
|
|
|
86 return (PlaceholderTable) VMObjectFactory.newObject(PlaceholderTable.class, tmp);
|
|
|
87 }
|
|
|
88
|
|
|
89 public LoaderConstraintTable constraints() {
|
|
|
90 Address tmp = placeholdersField.getValue();
|
|
|
91 return (LoaderConstraintTable) VMObjectFactory.newObject(LoaderConstraintTable.class, tmp);
|
|
|
92 }
|
|
|
93
|
|
|
94 // few well known classes -- not all are added here.
|
|
|
95 // add more if needed.
|
|
|
96 public static InstanceKlass getThreadKlass() {
|
|
|
97 return (InstanceKlass) newOop(threadKlassField.getValue());
|
|
|
98 }
|
|
|
99
|
|
|
100 public static InstanceKlass getThreadGroupKlass() {
|
|
|
101 return (InstanceKlass) newOop(threadGroupKlassField.getValue());
|
|
|
102 }
|
|
|
103
|
|
|
104 public static InstanceKlass getObjectKlass() {
|
|
|
105 return (InstanceKlass) newOop(objectKlassField.getValue());
|
|
|
106 }
|
|
|
107
|
|
|
108 public static InstanceKlass getStringKlass() {
|
|
|
109 return (InstanceKlass) newOop(stringKlassField.getValue());
|
|
|
110 }
|
|
|
111
|
|
|
112 public static InstanceKlass getClassLoaderKlass() {
|
|
|
113 return (InstanceKlass) newOop(classLoaderKlassField.getValue());
|
|
|
114 }
|
|
|
115
|
|
|
116 public static InstanceKlass getSystemKlass() {
|
|
|
117 return (InstanceKlass) newOop(systemKlassField.getValue());
|
|
|
118 }
|
|
|
119
|
|
|
120 public InstanceKlass getAbstractOwnableSynchronizerKlass() {
|
|
|
121 return (InstanceKlass) find("java/util/concurrent/locks/AbstractOwnableSynchronizer",
|
|
|
122 null, null);
|
|
|
123 }
|
|
|
124
|
|
|
125 public static Oop javaSystemLoader() {
|
|
|
126 return newOop(javaSystemLoaderField.getValue());
|
|
|
127 }
|
|
|
128
|
|
|
129 public static int getNumOfBuckets() {
|
|
|
130 return nofBuckets;
|
|
|
131 }
|
|
|
132
|
|
|
133 private static Oop newOop(OopHandle handle) {
|
|
|
134 return VM.getVM().getObjectHeap().newOop(handle);
|
|
|
135 }
|
|
|
136
|
|
|
137 /** Lookup an already loaded class. If not found null is returned. */
|
|
|
138 public Klass find(String className, Oop classLoader, Oop protectionDomain) {
|
|
|
139 Symbol sym = VM.getVM().getSymbolTable().probe(className);
|
|
|
140 if (sym == null) return null;
|
|
|
141 return find(sym, classLoader, protectionDomain);
|
|
|
142 }
|
|
|
143
|
|
|
144 /** Lookup an already loaded class. If not found null is returned. */
|
|
|
145 public Klass find(Symbol className, Oop classLoader, Oop protectionDomain) {
|
|
|
146 Dictionary dict = dictionary();
|
|
|
147 long hash = dict.computeHash(className, classLoader);
|
|
|
148 int index = dict.hashToIndex(hash);
|
|
|
149 return dict.find(index, hash, className, classLoader, protectionDomain);
|
|
|
150 }
|
|
|
151
|
|
|
152 /** Interface for iterating through all classes in dictionary */
|
|
|
153 public static interface ClassVisitor {
|
|
|
154 public void visit(Klass k);
|
|
|
155 }
|
|
|
156
|
|
|
157 /** Interface for iterating through all classes and their class
|
|
|
158 loaders in dictionary */
|
|
|
159 public static interface ClassAndLoaderVisitor {
|
|
|
160 public void visit(Klass k, Oop loader);
|
|
|
161 }
|
|
|
162
|
|
|
163 /** Iterate over all klasses - including object, primitive
|
|
|
164 array klasses */
|
|
|
165 public void allClassesDo(final ClassVisitor v) {
|
|
|
166 ClassVisitor visitor = new ClassVisitor() {
|
|
|
167 public void visit(Klass k) {
|
|
|
168 for (Klass l = k; l != null; l = l.arrayKlassOrNull()) {
|
|
|
169 v.visit(l);
|
|
|
170 }
|
|
|
171 }
|
|
|
172 };
|
|
|
173 classesDo(visitor);
|
|
|
174 VM.getVM().getUniverse().basicTypeClassesDo(visitor);
|
|
|
175 }
|
|
|
176
|
|
|
177 /** Iterate over all klasses in dictionary; just the classes from
|
|
|
178 declaring class loaders */
|
|
|
179 public void classesDo(ClassVisitor v) {
|
|
|
180 dictionary().classesDo(v);
|
|
|
181 }
|
|
|
182
|
|
|
183 /** All classes, and their class loaders */
|
|
|
184 public void classesDo(ClassAndLoaderVisitor v) {
|
|
|
185 dictionary().classesDo(v);
|
|
|
186 }
|
|
|
187
|
|
|
188 /** All array classes of primitive type, and their class loaders */
|
|
|
189 public void primArrayClassesDo(ClassAndLoaderVisitor v) {
|
|
|
190 placeholders().primArrayClassesDo(v);
|
|
|
191 }
|
|
|
192 }
|
