| /* |
| * Copyright (c) 2012, 2017, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.classfile; |
| |
| import java.io.PrintStream; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.memory.*; |
| import sun.jvm.hotspot.runtime.*; |
| import sun.jvm.hotspot.oops.*; |
| import sun.jvm.hotspot.types.*; |
| |
| public class ClassLoaderData extends VMObject { |
| static { |
| VM.registerVMInitializedObserver(new java.util.Observer() { |
| public void update(java.util.Observable o, Object data) { |
| initialize(VM.getVM().getTypeDataBase()); |
| } |
| }); |
| } |
| |
| private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { |
| Type type = db.lookupType("ClassLoaderData"); |
| classLoaderField = type.getOopField("_class_loader"); |
| nextField = type.getAddressField("_next"); |
| klassesField = new MetadataField(type.getAddressField("_klasses"), 0); |
| isAnonymousField = new CIntField(type.getCIntegerField("_is_anonymous"), 0); |
| dictionaryField = type.getAddressField("_dictionary"); |
| } |
| |
| private static sun.jvm.hotspot.types.OopField classLoaderField; |
| private static AddressField nextField; |
| private static MetadataField klassesField; |
| private static CIntField isAnonymousField; |
| private static AddressField dictionaryField; |
| |
| public ClassLoaderData(Address addr) { |
| super(addr); |
| } |
| |
| public Dictionary dictionary() { |
| Address tmp = dictionaryField.getValue(); |
| return (Dictionary) VMObjectFactory.newObject(Dictionary.class, tmp); |
| } |
| |
| public static ClassLoaderData instantiateWrapperFor(Address addr) { |
| if (addr == null) { |
| return null; |
| } |
| return new ClassLoaderData(addr); |
| } |
| |
| public Oop getClassLoader() { |
| return VM.getVM().getObjectHeap().newOop(classLoaderField.getValue(getAddress())); |
| } |
| |
| public boolean getIsAnonymous() { |
| return isAnonymousField.getValue(this) != 0; |
| } |
| |
| public ClassLoaderData next() { |
| return instantiateWrapperFor(nextField.getValue(getAddress())); |
| } |
| |
| public Klass getKlasses() { return (Klass)klassesField.getValue(this); } |
| |
| /** Lookup an already loaded class. If not found null is returned. */ |
| public Klass find(Symbol className) { |
| for (Klass l = getKlasses(); l != null; l = l.getNextLinkKlass()) { |
| if (className.equals(l.getName())) { |
| return l; |
| } |
| } |
| return null; |
| } |
| |
| /** Iterate over all klasses - including object, primitive |
| array klasses */ |
| public void classesDo(ClassLoaderDataGraph.ClassVisitor v) { |
| for (Klass l = getKlasses(); l != null; l = l.getNextLinkKlass()) { |
| v.visit(l); |
| } |
| } |
| |
| /** Iterate over all klasses in the dictionary, including initiating loader. */ |
| public void allEntriesDo(ClassLoaderDataGraph.ClassAndLoaderVisitor v) { |
| for (Klass l = getKlasses(); l != null; l = l.getNextLinkKlass()) { |
| dictionary().allEntriesDo(v, getClassLoader()); |
| } |
| } |
| } |