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

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2000-2007 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 import sun.jvm.hotspot.utilities.*;
33
34 // TypeArrayKlass is a proxy for typeArrayKlass in the JVM
35
36 public class TypeArrayKlass extends ArrayKlass {
37 static {
38 VM.registerVMInitializedObserver(new Observer() {
39 public void update(Observable o, Object data) {
40 initialize(VM.getVM().getTypeDataBase());
41 }
42 });
43 }
44
45 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
46 Type t = db.lookupType("typeArrayKlass");
47 maxLength = new CIntField(t.getCIntegerField("_max_length"), Oop.getHeaderSize());
48 }
49
50 TypeArrayKlass(OopHandle handle, ObjectHeap heap) {
51 super(handle, heap);
52 }
53
54 private static CIntField maxLength;
55
56 public long getMaxLength() { return maxLength.getValue(this); }
57
58 public static final int T_BOOLEAN = 4;
59 public static final int T_CHAR = 5;
60 public static final int T_FLOAT = 6;
61 public static final int T_DOUBLE = 7;
62 public static final int T_BYTE = 8;
63 public static final int T_SHORT = 9;
64 public static final int T_INT = 10;
65 public static final int T_LONG = 11;
66
67 public String getTypeName() {
68 switch ((int) getElementType()) {
69 case T_BOOLEAN: return "[Z";
70 case T_CHAR: return "[C";
71 case T_FLOAT: return "[F";
72 case T_DOUBLE: return "[D";
73 case T_BYTE: return "[B";
74 case T_SHORT: return "[S";
75 case T_INT: return "[I";
76 case T_LONG: return "[J";
77 }
78 return "Unknown TypeArray";
79 }
80
81 public String getElementTypeName() {
82 switch ((int) getElementType()) {
83 case T_BOOLEAN: return "boolean";
84 case T_CHAR: return "char";
85 case T_FLOAT: return "float";
86 case T_DOUBLE: return "double";
87 case T_BYTE: return "byte";
88 case T_SHORT: return "short";
89 case T_INT: return "int";
90 case T_LONG: return "long";
91 }
92 throw new RuntimeException("should not reach here");
93 }
94
95 public void printValueOn(PrintStream tty) {
96 tty.print("TypeArrayKlass for " + getTypeName());
97 }
98
99 public void iterateFields(OopVisitor visitor, boolean doVMFields) {
100 super.iterateFields(visitor, doVMFields);
101 if (doVMFields) {
102 visitor.doCInt(maxLength, true);
103 }
104 }
105
106 public Klass arrayKlassImpl(boolean orNull, int n) {
107 int dimension = (int) getDimension();
108 if (Assert.ASSERTS_ENABLED) {
109 Assert.that(dimension <= n, "check order of chain");
110 }
111 if (dimension == n)
112 return this;
113 ObjArrayKlass ak = (ObjArrayKlass) getHigherDimension();
114 if (ak == null) {
115 if (orNull) return null;
116 // FIXME: would need to change in reflective system to actually
117 // allocate klass
118 throw new RuntimeException("Can not allocate array klasses in debugging system");
119 }
120 if (orNull) {
121 return ak.arrayKlassOrNull(n);
122 }
123 return ak.arrayKlass(n);
124 }
125
126 public Klass arrayKlassImpl(boolean orNull) {
127 return arrayKlassImpl(orNull, (int) (getDimension() + 1));
128 }
129 }