/*
* 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()) {
/**代码未完, 请加载全部代码(NowJava.com).**/