/*
* Copyright (c) 2012, 2015, 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
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*/
package sun.jvm.hotspot.utilities;
import java.util.Observable;
import java.util.Observer;
import sun.jvm.hotspot.debugger.Address;
import sun.jvm.hotspot.oops.ArrayKlass;
import sun.jvm.hotspot.oops.CIntField;
import sun.jvm.hotspot.oops.Oop;
import sun.jvm.hotspot.runtime.VM;
import sun.jvm.hotspot.runtime.VMObject;
import sun.jvm.hotspot.types.AddressField;
import sun.jvm.hotspot.types.Type;
import sun.jvm.hotspot.types.TypeDataBase;
import sun.jvm.hotspot.types.WrongTypeException;
/**
* The base class for the mirrors of the Array<T> C++ classes.
*/
public abstract class GenericArray extends VMObject {
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 {
// Array<int> is arbitrarily chosen to get the fields in Array<T>.
Type type = db.lookupType("Array<int>");
lengthField = new CIntField(type.getCIntegerField("_length"), 0);
}
private static long sizeOfArray;
private static CIntField lengthField;
private long dataFieldOffset;
public GenericArray(Address addr, long dataOffset) {
super(addr);
dataFieldOffset = dataOffset;
}
public int length() {
return (int)lengthField.getValue(this);
}
// for compatibility with TypeArray
public int getLength() {
return length();
}
/**
* Gets the element at the given index.
*/
protected long getIntegerAt(int index) {
if (index < 0 || index >= length()) throw new ArrayIndexOutOfBoundsException(index + " " + length());
Type elemType = getElemType();
if (!getElemType().isCIntegerType()) throw new RuntimeException("elemType must be of CInteger type");
Address data = getAddress().addOffsetTo(dataFieldOffset);
long elemSize = elemType.getSize();
return data.getCIntegerAt(index * elemSize, elemSize, false);
}
protected Address getAddressAt(int index) {
if (index < 0 || index >= length()) throw new ArrayIndexOutOfBoundsException(index);
Type elemType = getElemType();
if (getElemType().isCIntegerType()) throw new RuntimeException("elemType must not be of CInteger type");
Address data = getAddress().addOffsetTo(dataFieldOffset);
long elemSize = elemType.getSize();
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