| /* |
| * Copyright (c) 2016, 2018, 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 java.util.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.classfile.*; |
| import sun.jvm.hotspot.runtime.*; |
| import sun.jvm.hotspot.oops.*; |
| import sun.jvm.hotspot.types.*; |
| |
| public class ClassLoaderDataGraph { |
| static { |
| VM.registerVMInitializedObserver(new Observer() { |
| public void update(Observable o, Object data) { |
| initialize(VM.getVM().getTypeDataBase()); |
| } |
| }); |
| } |
| |
| private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { |
| Type type = db.lookupType("ClassLoaderDataGraph"); |
| |
| headField = type.getAddressField("_head"); |
| } |
| |
| private static AddressField headField; |
| |
| public ClassLoaderData getClassLoaderGraphHead() { |
| return ClassLoaderData.instantiateWrapperFor(headField.getValue()); |
| } |
| |
| /** Lookup an already loaded class in any class loader. */ |
| public Klass find(String className) { |
| for (ClassLoaderData cld = getClassLoaderGraphHead(); cld != null; cld = cld.next()) { |
| Klass k = cld.find(className); |
| if (k != null) { |
| return k; |
| } |
| } |
| return null; |
| } |
| |
| /** Interface for iterating through all classes. */ |
| 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 classesDo(ClassVisitor v) { |
| for (ClassLoaderData cld = getClassLoaderGraphHead(); cld != null; cld = cld.next()) { |
| cld.classesDo(v); |
| } |
| } |
| |
| /** Iterate over all klasses - including object, primitive |
| array klasses, pass initiating loader. */ |
| public void allEntriesDo(ClassAndLoaderVisitor v) { |
| for (ClassLoaderData cld = getClassLoaderGraphHead(); cld != null; cld = cld.next()) { |
| cld.allEntriesDo(v); |
| } |
| } |
| } |