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comparison agent/src/share/classes/sun/jvm/hotspot/oops/NarrowOopField.java @ 113:ba764ed4b6f2

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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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equal deleted inserted replaced
110:a49a647afe9a 113:ba764ed4b6f2
1 /*
2 * Copyright 2000-2008 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.oops;
26
27 import sun.jvm.hotspot.debugger.*;
28
29 // The class for an oop field simply provides access to the value.
30 public class NarrowOopField extends OopField {
31 public NarrowOopField(FieldIdentifier id, long offset, boolean isVMField) {
32 super(id, offset, isVMField);
33 }
34
35 public NarrowOopField(sun.jvm.hotspot.types.OopField vmField, long startOffset) {
36 super(new NamedFieldIdentifier(vmField.getName()), vmField.getOffset() + startOffset, true);
37 }
38
39 public NarrowOopField(InstanceKlass holder, int fieldArrayIndex) {
40 super(holder, fieldArrayIndex);
41 }
42
43 public Oop getValue(Oop obj) {
44 return obj.getHeap().newOop(getValueAsOopHandle(obj));
45 }
46
47 /** Debugging support */
48 public OopHandle getValueAsOopHandle(Oop obj) {
49 return obj.getHandle().getCompOopHandleAt(getOffset());
50 }
51
52 public void setValue(Oop obj) throws MutationException {
53 // Fix this: setOopAt is missing in Address
54 }
55 }