1 /* 2 * Copyright (c) 2003, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * 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 }