Mercurial > hg > truffle
comparison agent/src/share/classes/sun/jvm/hotspot/memory/SystemDictionary.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 | 60b728ec77c1 |
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-1:000000000000 | 0:a61af66fc99e |
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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 } |