| /* |
| * 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| 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(); |
| |
| return data.getAddressAt(index * elemSize); |
| } |
| |
| private long byteSizeof(int length) { return sizeOfArray + length * getElemType().getSize(); } |
| |
| public long getSize() { |
| return VM.getVM().alignUp(byteSizeof(length()), VM.getVM().getBytesPerWord()) / VM.getVM().getBytesPerWord(); |
| } |
| |
| /** |
| * The element type of this array. |
| */ |
| public abstract Type getElemType(); |
| } |