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comparison agent/src/share/classes/sun/jvm/hotspot/oops/ObjArray.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children ba764ed4b6f2
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1 /*
2 * Copyright 2000-2004 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 java.io.*;
28 import java.util.*;
29 import sun.jvm.hotspot.debugger.*;
30 import sun.jvm.hotspot.runtime.*;
31 import sun.jvm.hotspot.types.*;
32
33 // An ObjArray is an array containing oops
34
35 public class ObjArray extends Array {
36 static {
37 VM.registerVMInitializedObserver(new Observer() {
38 public void update(Observable o, Object data) {
39 initialize(VM.getVM().getTypeDataBase());
40 }
41 });
42 }
43
44 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
45 Type type = db.lookupType("objArrayOopDesc");
46 elementSize = db.getOopSize();
47 }
48
49 ObjArray(OopHandle handle, ObjectHeap heap) {
50 super(handle, heap);
51 }
52
53 public boolean isObjArray() { return true; }
54
55 private static long elementSize;
56
57 public Oop getObjAt(long index) {
58 long offset = baseOffsetInBytes(BasicType.T_OBJECT) + (index * elementSize);
59 return getHeap().newOop(getHandle().getOopHandleAt(offset));
60 }
61
62 public void printValueOn(PrintStream tty) {
63 tty.print("ObjArray");
64 }
65
66 public void iterateFields(OopVisitor visitor, boolean doVMFields) {
67 super.iterateFields(visitor, doVMFields);
68 int length = (int) getLength();
69 long baseOffset = baseOffsetInBytes(BasicType.T_OBJECT);
70 for (int index = 0; index < length; index++) {
71 long offset = baseOffset + (index * elementSize);
72 visitor.doOop(new OopField(new IndexableFieldIdentifier(index), offset, false), false);
73 }
74 }
75 }