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1 /*
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2 * Copyright 2000-2007 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.oops;
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26
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27 import java.io.*;
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28 import java.util.*;
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29 import sun.jvm.hotspot.debugger.*;
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30 import sun.jvm.hotspot.runtime.*;
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31 import sun.jvm.hotspot.types.*;
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32 import sun.jvm.hotspot.utilities.*;
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33
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34 // TypeArrayKlass is a proxy for typeArrayKlass in the JVM
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35
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36 public class TypeArrayKlass extends ArrayKlass {
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37 static {
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38 VM.registerVMInitializedObserver(new Observer() {
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39 public void update(Observable o, Object data) {
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40 initialize(VM.getVM().getTypeDataBase());
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41 }
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42 });
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43 }
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44
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45 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
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46 Type t = db.lookupType("typeArrayKlass");
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47 maxLength = new CIntField(t.getCIntegerField("_max_length"), Oop.getHeaderSize());
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48 }
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49
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50 TypeArrayKlass(OopHandle handle, ObjectHeap heap) {
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51 super(handle, heap);
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52 }
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53
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54 private static CIntField maxLength;
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55
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56 public long getMaxLength() { return maxLength.getValue(this); }
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57
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58 public static final int T_BOOLEAN = 4;
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59 public static final int T_CHAR = 5;
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60 public static final int T_FLOAT = 6;
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61 public static final int T_DOUBLE = 7;
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62 public static final int T_BYTE = 8;
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63 public static final int T_SHORT = 9;
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64 public static final int T_INT = 10;
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65 public static final int T_LONG = 11;
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66
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67 public String getTypeName() {
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68 switch ((int) getElementType()) {
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69 case T_BOOLEAN: return "[Z";
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70 case T_CHAR: return "[C";
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71 case T_FLOAT: return "[F";
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72 case T_DOUBLE: return "[D";
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73 case T_BYTE: return "[B";
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74 case T_SHORT: return "[S";
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75 case T_INT: return "[I";
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76 case T_LONG: return "[J";
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77 }
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78 return "Unknown TypeArray";
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79 }
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80
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81 public String getElementTypeName() {
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82 switch ((int) getElementType()) {
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83 case T_BOOLEAN: return "boolean";
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84 case T_CHAR: return "char";
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85 case T_FLOAT: return "float";
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86 case T_DOUBLE: return "double";
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87 case T_BYTE: return "byte";
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88 case T_SHORT: return "short";
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89 case T_INT: return "int";
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90 case T_LONG: return "long";
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91 }
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92 throw new RuntimeException("should not reach here");
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93 }
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94
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95 public void printValueOn(PrintStream tty) {
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96 tty.print("TypeArrayKlass for " + getTypeName());
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97 }
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98
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99 public void iterateFields(OopVisitor visitor, boolean doVMFields) {
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100 super.iterateFields(visitor, doVMFields);
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101 if (doVMFields) {
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102 visitor.doCInt(maxLength, true);
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103 }
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104 }
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105
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106 public Klass arrayKlassImpl(boolean orNull, int n) {
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107 int dimension = (int) getDimension();
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108 if (Assert.ASSERTS_ENABLED) {
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109 Assert.that(dimension <= n, "check order of chain");
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110 }
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111 if (dimension == n)
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112 return this;
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113 ObjArrayKlass ak = (ObjArrayKlass) getHigherDimension();
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114 if (ak == null) {
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115 if (orNull) return null;
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116 // FIXME: would need to change in reflective system to actually
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117 // allocate klass
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118 throw new RuntimeException("Can not allocate array klasses in debugging system");
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119 }
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120 if (orNull) {
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121 return ak.arrayKlassOrNull(n);
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122 }
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123 return ak.arrayKlass(n);
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124 }
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125
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126 public Klass arrayKlassImpl(boolean orNull) {
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127 return arrayKlassImpl(orNull, (int) (getDimension() + 1));
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128 }
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129 }
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