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/*
* Copyright (c) 2000, 2012, 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.oops;
import java.io.*;
import java.util.*;
import sun.jvm.hotspot.utilities.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.memory.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.types.*;
// ArrayKlass is the abstract class for all array classes
public class ArrayKlass extends Klass {
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("ArrayKlass");
dimension = new CIntField(type.getCIntegerField("_dimension"), 0);
higherDimension = new MetadataField(type.getAddressField("_higher_dimension"), 0);
lowerDimension = new MetadataField(type.getAddressField("_lower_dimension"), 0);
vtableLen = new CIntField(type.getCIntegerField("_vtable_len"), 0);
allocSize = new CIntField(type.getCIntegerField("_alloc_size"), 0);
componentMirror = new OopField(type.getOopField("_component_mirror"), 0);
javaLangCloneableName = null;
javaLangObjectName = null;
javaIoSerializableName = null;
}
public ArrayKlass(Address addr) {
super(addr);
}
private static CIntField dimension;
private static MetadataField higherDimension;
private static MetadataField lowerDimension;
private static CIntField vtableLen;
private static CIntField allocSize;
private static OopField componentMirror;
public Klass getJavaSuper() {
SystemDictionary sysDict = VM.getVM().getSystemDictionary();
return sysDict.getObjectKlass();
}
public long getDimension() { return dimension.getValue(this); }
public Klass getHigherDimension() { return (Klass) higherDimension.getValue(this); }
public Klass getLowerDimension() { return (Klass) lowerDimension.getValue(this); }
public long getVtableLen() { return vtableLen.getValue(this); }
public long getAllocSize() { return allocSize.getValue(this); }
public Oop getComponentMirror() { return componentMirror.getValue(this); }
// constant class names - javaLangCloneable, javaIoSerializable, javaLangObject
// Initialized lazily to avoid initialization ordering dependencies between ArrayKlass and SymbolTable
private static Symbol javaLangCloneableName;
private static Symbol javaLangObjectName;
private static Symbol javaIoSerializableName;
private static Symbol javaLangCloneableName() {
if (javaLangCloneableName == null) {
javaLangCloneableName = VM.getVM().getSymbolTable().probe("java/lang/Cloneable");
}
return javaLangCloneableName;
}
private static Symbol javaLangObjectName() {
if (javaLangObjectName == null) {
javaLangObjectName = VM.getVM().getSymbolTable().probe("java/lang/Object");
}
return javaLangObjectName;
}
private static Symbol javaIoSerializableName() {
if (javaIoSerializableName == null) {
javaIoSerializableName = VM.getVM().getSymbolTable().probe("java/io/Serializable");
}
return javaIoSerializableName;
}
public int getClassStatus() {
return JVMDIClassStatus.VERIFIED | JVMDIClassStatus.PREPARED | JVMDIClassStatus.INITIALIZED;
}
public long computeModifierFlags() {
return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC;
}
public long getArrayHeaderInBytes() {
return Bits.maskBits(getLayoutHelper() >> LH_HEADER_SIZE_SHIFT, 0xFF);
}
public int getLog2ElementSize() {
return Bits.maskBits(getLayoutHelper() >> LH_LOG2_ELEMENT_SIZE_SHIFT, 0xFF);
}
public int getElementType() {
return Bits.maskBits(getLayoutHelper() >> LH_ELEMENT_TYPE_SHIFT, 0xFF);
}
boolean computeSubtypeOf(Klass k) {
// An array is a subtype of Serializable, Clonable, and Object
Symbol name = k.getName();
if (name != null && (name.equals(javaIoSerializableName()) ||
name.equals(javaLangCloneableName()) ||
name.equals(javaLangObjectName()))) {
return true;
} else {
return false;
}
}
public void printValueOn(PrintStream tty) {
tty.print("ArrayKlass");
}
public void iterateFields(MetadataVisitor visitor) {
super.iterateFields(visitor);
visitor.doCInt(dimension, true);
visitor.doMetadata(higherDimension, true);
visitor.doMetadata(lowerDimension, true);
visitor.doCInt(vtableLen, true);
visitor.doCInt(allocSize, true);
visitor.doOop(componentMirror, true);
}
}
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