Mercurial > hg > truffle
comparison agent/src/share/classes/sun/jvm/hotspot/oops/ObjArrayKlass.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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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 import sun.jvm.hotspot.utilities.*; | |
33 | |
34 // ObjArrayKlass is the klass for ObjArrays | |
35 | |
36 public class ObjArrayKlass 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 type = db.lookupType("objArrayKlass"); | |
47 elementKlass = new OopField(type.getOopField("_element_klass"), Oop.getHeaderSize()); | |
48 bottomKlass = new OopField(type.getOopField("_bottom_klass"), Oop.getHeaderSize()); | |
49 } | |
50 | |
51 ObjArrayKlass(OopHandle handle, ObjectHeap heap) { | |
52 super(handle, heap); | |
53 } | |
54 | |
55 private static OopField elementKlass; | |
56 private static OopField bottomKlass; | |
57 | |
58 public Klass getElementKlass() { return (Klass) elementKlass.getValue(this); } | |
59 public Klass getBottomKlass() { return (Klass) bottomKlass.getValue(this); } | |
60 | |
61 public long computeModifierFlags() { | |
62 long elementFlags = getElementKlass().computeModifierFlags(); | |
63 long arrayFlags = 0L; | |
64 if ((elementFlags & (JVM_ACC_PUBLIC | JVM_ACC_PROTECTED)) != 0) { | |
65 // The array type is public if the component type is public or protected | |
66 arrayFlags = JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
67 } else { | |
68 // The array type is private if the component type is private | |
69 arrayFlags = JVM_ACC_ABSTRACT | JVM_ACC_FINAL; | |
70 } | |
71 return arrayFlags; | |
72 } | |
73 | |
74 public void iterateFields(OopVisitor visitor, boolean doVMFields) { | |
75 super.iterateFields(visitor, doVMFields); | |
76 if (doVMFields) { | |
77 visitor.doOop(elementKlass, true); | |
78 visitor.doOop(bottomKlass, true); | |
79 } | |
80 } | |
81 | |
82 public Klass arrayKlassImpl(boolean orNull, int n) { | |
83 if (Assert.ASSERTS_ENABLED) { | |
84 Assert.that(getDimension() <= n, "check order of chain"); | |
85 } | |
86 int dimension = (int) getDimension(); | |
87 if (dimension == n) { | |
88 return this; | |
89 } | |
90 ObjArrayKlass ak = (ObjArrayKlass) getHigherDimension(); | |
91 if (ak == null) { | |
92 if (orNull) return null; | |
93 // FIXME: would need to change in reflective system to actually | |
94 // allocate klass | |
95 throw new RuntimeException("Can not allocate array klasses in debugging system"); | |
96 } | |
97 | |
98 if (orNull) { | |
99 return ak.arrayKlassOrNull(n); | |
100 } | |
101 return ak.arrayKlass(n); | |
102 } | |
103 | |
104 public Klass arrayKlassImpl(boolean orNull) { | |
105 return arrayKlassImpl(orNull, (int) (getDimension() + 1)); | |
106 } | |
107 | |
108 public void printValueOn(PrintStream tty) { | |
109 tty.print("ObjArrayKlass for "); | |
110 getElementKlass().printValueOn(tty); | |
111 } | |
112 }; |