View Javadoc
1   /*
2    * Copyright (c) 2012, 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.utilities.*;
30  import sun.jvm.hotspot.debugger.*;
31  import sun.jvm.hotspot.runtime.*;
32  import sun.jvm.hotspot.types.*;
33  
34  abstract public class Metadata extends VMObject {
35    static {
36      VM.registerVMInitializedObserver(new Observer() {
37          public void update(Observable o, Object data) {
38            initialize(VM.getVM().getTypeDataBase());
39          }
40        });
41    }
42  
43    public Metadata(Address addr) {
44      super(addr);
45    }
46  
47    private static VirtualBaseConstructor<Metadata> metadataConstructor;
48  
49    private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
50      metadataConstructor = new VirtualBaseConstructor<Metadata>(db, db.lookupType("Metadata"), null, null);
51      // Define an explicit mapping since the C++ and Java type names don't match.
52      metadataConstructor.addMapping("Metadata", Metadata.class);
53      metadataConstructor.addMapping("Klass", Klass.class);
54      metadataConstructor.addMapping("InstanceKlass", InstanceKlass.class);
55      metadataConstructor.addMapping("InstanceMirrorKlass", InstanceMirrorKlass.class);
56      metadataConstructor.addMapping("InstanceRefKlass", InstanceRefKlass.class);
57      metadataConstructor.addMapping("InstanceClassLoaderKlass", InstanceClassLoaderKlass.class);
58      metadataConstructor.addMapping("TypeArrayKlass", TypeArrayKlass.class);
59      metadataConstructor.addMapping("ObjArrayKlass", ObjArrayKlass.class);
60      metadataConstructor.addMapping("Method", Method.class);
61      metadataConstructor.addMapping("MethodData", MethodData.class);
62      metadataConstructor.addMapping("ConstMethod", ConstMethod.class);
63      metadataConstructor.addMapping("ConstantPool", ConstantPool.class);
64      metadataConstructor.addMapping("ConstantPoolCache", ConstantPoolCache.class);
65    }
66  
67    public static Metadata instantiateWrapperFor(Address addr) {
68      return metadataConstructor.instantiateWrapperFor(addr);
69    }
70  
71    public void iterate(MetadataVisitor visitor) {
72      visitor.setObj(this);
73      visitor.prologue();
74      iterateFields(visitor);
75      visitor.epilogue();
76    }
77  
78    void iterateFields(MetadataVisitor visitor) {
79    }
80  
81    abstract public void printValueOn(PrintStream tty);
82    public void dumpReplayData(PrintStream out) {
83        out.println("# Unknown Metadata");
84    }
85  }