Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/oops/Array.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | ba764ed4b6f2 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/oops/Array.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,91 @@ +/* + * Copyright 2000-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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"); + length = new CIntField(type.getCIntegerField("_length"), 0); + headerSize = type.getSize(); + } + + // Size of the arrayOopDesc + private static long headerSize; + + // Fields + private static CIntField length; + + // Accessors for declared fields + public long getLength() { return length.getValue(this); } + + 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) { + if (Universe.elementTypeShouldBeAligned(type)) { + return (VM.getVM().isLP64()) ? alignObjectSize(headerSize) + : VM.getVM().alignUp(headerSize, 8); + } else { + return headerSize; + } + } + + public boolean isArray() { return true; } + + public void iterateFields(OopVisitor visitor, boolean doVMFields) { + super.iterateFields(visitor, doVMFields); + if (doVMFields) { + visitor.doCInt(length, true); + } + } +}