| /* |
| * 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.util.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.memory.*; |
| import sun.jvm.hotspot.runtime.*; |
| import sun.jvm.hotspot.types.*; |
| |
| // Array is an abstract superclass for TypeArray and ObjArray |
| |
| public class Array extends Oop { |
| static { |
| VM.registerVMInitializedObserver(new Observer() { |
| public void update(Observable o, Object data) { |
| initialize(VM.getVM().getTypeDataBase()); |
| } |
| }); |
| } |
| |
| Array(OopHandle handle, ObjectHeap heap) { |
| super(handle, heap); |
| } |
| |
| private static void initialize(TypeDataBase db) throws WrongTypeException { |
| Type type = db.lookupType("arrayOopDesc"); |
| typeSize = (int)type.getSize(); |
| } |
| |
| // Size of the arrayOopDesc |
| private static long headerSize=0; |
| private static long lengthOffsetInBytes=0; |
| private static long typeSize; |
| |
| private static long headerSizeInBytes() { |
| if (headerSize != 0) { |
| return headerSize; |
| } |
| if (VM.getVM().isCompressedKlassPointersEnabled()) { |
| headerSize = typeSize; |
| } else { |
| headerSize = VM.getVM().alignUp(typeSize + VM.getVM().getIntSize(), |
| VM.getVM().getHeapWordSize()); |
| } |
| return headerSize; |
| } |
| |
| private static long headerSize(BasicType type) { |
| if (Universe.elementTypeShouldBeAligned(type)) { |
| return alignObjectSize(headerSizeInBytes())/VM.getVM().getHeapWordSize(); |
| } else { |
| return headerSizeInBytes()/VM.getVM().getHeapWordSize(); |
| } |
| } |
| |
| private long lengthOffsetInBytes() { |
| if (lengthOffsetInBytes != 0) { |
| return lengthOffsetInBytes; |
| } |
| if (VM.getVM().isCompressedKlassPointersEnabled()) { |
| lengthOffsetInBytes = typeSize - VM.getVM().getIntSize(); |
| } else { |
| lengthOffsetInBytes = typeSize; |
| } |
| return lengthOffsetInBytes; |
| } |
| |
| // Accessors for declared fields |
| public long getLength() { |
| boolean isUnsigned = true; |
| return this.getHandle().getCIntegerAt(lengthOffsetInBytes(), VM.getVM().getIntSize(), isUnsigned); |
| } |
| |
| public long getObjectSize() { |
| ArrayKlass klass = (ArrayKlass) getKlass(); |
| // We have to fetch the length of the array, shift (multiply) it |
| // appropriately, up to wordSize, add the header, and align to |
| // object size. |
| long s = getLength() << klass.getLog2ElementSize(); |
| s += klass.getArrayHeaderInBytes(); |
| s = Oop.alignObjectSize(s); |
| return s; |
| } |
| |
| public static long baseOffsetInBytes(BasicType type) { |
| return headerSize(type) * VM.getVM().getHeapWordSize(); |
| } |
| |
| public boolean isArray() { return true; } |
| |
| public void iterateFields(OopVisitor visitor, boolean doVMFields) { |
| super.iterateFields(visitor, doVMFields); |
| } |
| } |