--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/agent/src/share/classes/sun/jvm/hotspot/memory/SystemDictionary.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,192 @@
+/*
+ * Copyright 2001-2005 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+package sun.jvm.hotspot.memory;
+
+import java.util.*;
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.oops.*;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.types.*;
+
+public class SystemDictionary {
+ private static AddressField dictionaryField;
+ private static AddressField sharedDictionaryField;
+ private static AddressField placeholdersField;
+ private static AddressField loaderConstraintTableField;
+ private static sun.jvm.hotspot.types.OopField javaSystemLoaderField;
+ private static int nofBuckets;
+
+ private static sun.jvm.hotspot.types.OopField objectKlassField;
+ private static sun.jvm.hotspot.types.OopField classLoaderKlassField;
+ private static sun.jvm.hotspot.types.OopField stringKlassField;
+ private static sun.jvm.hotspot.types.OopField systemKlassField;
+ private static sun.jvm.hotspot.types.OopField threadKlassField;
+ private static sun.jvm.hotspot.types.OopField threadGroupKlassField;
+
+ static {
+ VM.registerVMInitializedObserver(new Observer() {
+ public void update(Observable o, Object data) {
+ initialize(VM.getVM().getTypeDataBase());
+ }
+ });
+ }
+
+ private static synchronized void initialize(TypeDataBase db) {
+ Type type = db.lookupType("SystemDictionary");
+
+ dictionaryField = type.getAddressField("_dictionary");
+ sharedDictionaryField = type.getAddressField("_shared_dictionary");
+ placeholdersField = type.getAddressField("_placeholders");
+ loaderConstraintTableField = type.getAddressField("_loader_constraints");
+ javaSystemLoaderField = type.getOopField("_java_system_loader");
+ nofBuckets = db.lookupIntConstant("SystemDictionary::_nof_buckets").intValue();
+
+ objectKlassField = type.getOopField("_object_klass");
+ classLoaderKlassField = type.getOopField("_classloader_klass");
+ stringKlassField = type.getOopField("_string_klass");
+ systemKlassField = type.getOopField("_system_klass");
+ threadKlassField = type.getOopField("_thread_klass");
+ threadGroupKlassField = type.getOopField("_threadGroup_klass");
+ }
+
+ public Dictionary dictionary() {
+ Address tmp = dictionaryField.getValue();
+ return (Dictionary) VMObjectFactory.newObject(Dictionary.class, tmp);
+ }
+
+ public Dictionary sharedDictionary() {
+ Address tmp = sharedDictionaryField.getValue();
+ return (Dictionary) VMObjectFactory.newObject(Dictionary.class, tmp);
+ }
+
+ public PlaceholderTable placeholders() {
+ Address tmp = placeholdersField.getValue();
+ return (PlaceholderTable) VMObjectFactory.newObject(PlaceholderTable.class, tmp);
+ }
+
+ public LoaderConstraintTable constraints() {
+ Address tmp = placeholdersField.getValue();
+ return (LoaderConstraintTable) VMObjectFactory.newObject(LoaderConstraintTable.class, tmp);
+ }
+
+ // few well known classes -- not all are added here.
+ // add more if needed.
+ public static InstanceKlass getThreadKlass() {
+ return (InstanceKlass) newOop(threadKlassField.getValue());
+ }
+
+ public static InstanceKlass getThreadGroupKlass() {
+ return (InstanceKlass) newOop(threadGroupKlassField.getValue());
+ }
+
+ public static InstanceKlass getObjectKlass() {
+ return (InstanceKlass) newOop(objectKlassField.getValue());
+ }
+
+ public static InstanceKlass getStringKlass() {
+ return (InstanceKlass) newOop(stringKlassField.getValue());
+ }
+
+ public static InstanceKlass getClassLoaderKlass() {
+ return (InstanceKlass) newOop(classLoaderKlassField.getValue());
+ }
+
+ public static InstanceKlass getSystemKlass() {
+ return (InstanceKlass) newOop(systemKlassField.getValue());
+ }
+
+ public InstanceKlass getAbstractOwnableSynchronizerKlass() {
+ return (InstanceKlass) find("java/util/concurrent/locks/AbstractOwnableSynchronizer",
+ null, null);
+ }
+
+ public static Oop javaSystemLoader() {
+ return newOop(javaSystemLoaderField.getValue());
+ }
+
+ public static int getNumOfBuckets() {
+ return nofBuckets;
+ }
+
+ private static Oop newOop(OopHandle handle) {
+ return VM.getVM().getObjectHeap().newOop(handle);
+ }
+
+ /** Lookup an already loaded class. If not found null is returned. */
+ public Klass find(String className, Oop classLoader, Oop protectionDomain) {
+ Symbol sym = VM.getVM().getSymbolTable().probe(className);
+ if (sym == null) return null;
+ return find(sym, classLoader, protectionDomain);
+ }
+
+ /** Lookup an already loaded class. If not found null is returned. */
+ public Klass find(Symbol className, Oop classLoader, Oop protectionDomain) {
+ Dictionary dict = dictionary();
+ long hash = dict.computeHash(className, classLoader);
+ int index = dict.hashToIndex(hash);
+ return dict.find(index, hash, className, classLoader, protectionDomain);
+ }
+
+ /** Interface for iterating through all classes in dictionary */
+ public static interface ClassVisitor {
+ public void visit(Klass k);
+ }
+
+ /** Interface for iterating through all classes and their class
+ loaders in dictionary */
+ public static interface ClassAndLoaderVisitor {
+ public void visit(Klass k, Oop loader);
+ }
+
+ /** Iterate over all klasses - including object, primitive
+ array klasses */
+ public void allClassesDo(final ClassVisitor v) {
+ ClassVisitor visitor = new ClassVisitor() {
+ public void visit(Klass k) {
+ for (Klass l = k; l != null; l = l.arrayKlassOrNull()) {
+ v.visit(l);
+ }
+ }
+ };
+ classesDo(visitor);
+ VM.getVM().getUniverse().basicTypeClassesDo(visitor);
+ }
+
+ /** Iterate over all klasses in dictionary; just the classes from
+ declaring class loaders */
+ public void classesDo(ClassVisitor v) {
+ dictionary().classesDo(v);
+ }
+
+ /** All classes, and their class loaders */
+ public void classesDo(ClassAndLoaderVisitor v) {
+ dictionary().classesDo(v);
+ }
+
+ /** All array classes of primitive type, and their class loaders */
+ public void primArrayClassesDo(ClassAndLoaderVisitor v) {
+ placeholders().primArrayClassesDo(v);
+ }
+}