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comparison agent/src/share/classes/sun/jvm/hotspot/memory/PlaceholderTable.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 c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2003 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.memory;
26
27 import sun.jvm.hotspot.debugger.*;
28 import sun.jvm.hotspot.oops.*;
29 import sun.jvm.hotspot.runtime.*;
30 import sun.jvm.hotspot.utilities.*;
31
32 public class PlaceholderTable extends TwoOopHashtable {
33 public PlaceholderTable(Address addr) {
34 super(addr);
35 }
36
37 // this is overriden here so that Hashtable.bucket will return
38 // object of PlacholderEntry.class
39 protected Class getHashtableEntryClass() {
40 return PlaceholderEntry.class;
41 }
42
43 /** All array classes of primitive type, and their class loaders */
44 public void primArrayClassesDo(SystemDictionary.ClassAndLoaderVisitor v) {
45 ObjectHeap heap = VM.getVM().getObjectHeap();
46 int tblSize = tableSize();
47 for (int index = 0; index < tblSize; index++) {
48 for (PlaceholderEntry probe = (PlaceholderEntry) bucket(index); probe != null;
49 probe = (PlaceholderEntry) probe.next()) {
50 Symbol sym = probe.klass();
51 // array of primitive arrays are stored in system dictionary as placeholders
52 FieldType ft = new FieldType(sym);
53 if (ft.isArray()) {
54 FieldType.ArrayInfo info = ft.getArrayInfo();
55 if (info.elementBasicType() != BasicType.getTObject()) {
56 Klass arrayKlass = heap.typeArrayKlassObj(info.elementBasicType());
57 arrayKlass = arrayKlass.arrayKlassOrNull(info.dimension());
58 v.visit(arrayKlass, probe.loader());
59 }
60 }
61 }
62 }
63 }
64 }