1 /*
 2  * Copyright (c) 2011, 2020, 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.oops;
26 
27 import java.io.*;
28 import java.util.*;
29 import sun.jvm.hotspot.debugger.*;
30 import sun.jvm.hotspot.memory.*;
31 import sun.jvm.hotspot.runtime.*;
32 import sun.jvm.hotspot.types.*;
33 import sun.jvm.hotspot.utilities.*;
34 import sun.jvm.hotspot.utilities.Observable;
35 import sun.jvm.hotspot.utilities.Observer;
36 
37 // An InstanceKlass is the VM level representation of a Java class.
38 
39 public class InstanceMirrorKlass extends InstanceKlass {
40   static {
41     VM.registerVMInitializedObserver(new Observer() {
42         public void update(Observable o, Object data) {
43           initialize(VM.getVM().getTypeDataBase());
44         }
45       });
46   }
47 
48   private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
49     // Just make sure it's there for now
50     Type type = db.lookupType("InstanceMirrorKlass");
51   }
52 
53   public InstanceMirrorKlass(Address addr) {
54     super(addr);
55   }
56 
57   public long getObjectSize(Oop o) {
58     return java_lang_Class.getOopSize(o) * VM.getVM().getAddressSize();








59   }
60 
61   public void iterateNonStaticFields(OopVisitor visitor, Oop obj) {
62     super.iterateNonStaticFields(visitor, obj);
63     // Fetch the real klass from the mirror object
64     Klass klass = java_lang_Class.asKlass(obj);
65     if (klass instanceof InstanceKlass) {
66       ((InstanceKlass)klass).iterateStaticFields(visitor);
67     }
68   }
69 }
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