/*
* Copyright (c) 2012, 2019, 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 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");
classLoaderFieldOffset = type.getAddressField("_class_loader").getOffset();
nextField = type.getAddressField("_next");
klassesField = new MetadataField(type.getAddressField("_klasses"), 0);
isUnsafeAnonymousField = new CIntField(type.getCIntegerField("_is_unsafe_anonymous"), 0);
dictionaryField = type.getAddressField("_dictionary");
}
private static long classLoaderFieldOffset;
private static AddressField nextField;
private static MetadataField klassesField;
private static CIntField isUnsafeAnonymousField;
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() {
Address addr = getAddress().addOffsetTo(classLoaderFieldOffset);
VMOopHandle vmOopHandle = VMObjectFactory.newObject(VMOopHandle.class, addr);
return vmOopHandle.resolve();
}
public boolean getisUnsafeAnonymous() {
return isUnsafeAnonymousField.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(String className) {
for (Klass l = getKlasses(); l != null; l = l.getNextLinkKlass()) {
if (l.getName().equals(className)) {
return l;
}
}
return null;
}
/** Iterate over all klasses - including object, primitive
array klasses */
public void classesDo(ClassLoaderDataGraph.ClassVisitor v) {
/**代码未完, 请加载全部代码(NowJava.com).**/