Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/oops/NarrowOopField.java @ 113:ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
author | coleenp |
---|---|
date | Sun, 13 Apr 2008 17:43:42 -0400 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/oops/NarrowOopField.java Sun Apr 13 17:43:42 2008 -0400 @@ -0,0 +1,55 @@ +/* + * Copyright 2000-2008 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 sun.jvm.hotspot.debugger.*; + +// The class for an oop field simply provides access to the value. +public class NarrowOopField extends OopField { + public NarrowOopField(FieldIdentifier id, long offset, boolean isVMField) { + super(id, offset, isVMField); + } + + public NarrowOopField(sun.jvm.hotspot.types.OopField vmField, long startOffset) { + super(new NamedFieldIdentifier(vmField.getName()), vmField.getOffset() + startOffset, true); + } + + public NarrowOopField(InstanceKlass holder, int fieldArrayIndex) { + super(holder, fieldArrayIndex); + } + + public Oop getValue(Oop obj) { + return obj.getHeap().newOop(getValueAsOopHandle(obj)); + } + + /** Debugging support */ + public OopHandle getValueAsOopHandle(Oop obj) { + return obj.getHandle().getCompOopHandleAt(getOffset()); + } + + public void setValue(Oop obj) throws MutationException { + // Fix this: setOopAt is missing in Address + } +}