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comparison agent/src/share/classes/sun/jvm/hotspot/runtime/VirtualBaseConstructor.java @ 3939:f6f3bb0ee072

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7088955: add C2 IR support to the SA Reviewed-by: kvn
author never
date Sun, 11 Sep 2011 14:48:24 -0700
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children da91efe96a93
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3938:e6b1331a51d2 3939:f6f3bb0ee072
1 /*
2 * Copyright (c) 2000, 2011, 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.runtime;
26
27 import java.util.*;
28 import sun.jvm.hotspot.debugger.*;
29 import sun.jvm.hotspot.debugger.cdbg.CDebugger;
30 import sun.jvm.hotspot.debugger.cdbg.ClosestSymbol;
31 import sun.jvm.hotspot.debugger.cdbg.LoadObject;
32 import sun.jvm.hotspot.types.*;
33 import sun.jvm.hotspot.HotSpotTypeDataBase;
34
35 /** This provides a factory to create instances where the base virtual
36 * type is know and the expected subclasses are within a particular
37 * package. */
38
39 public class VirtualBaseConstructor<T> extends InstanceConstructor {
40 private TypeDataBase db;
41 private HashMap map; // Map<String, Class>
42 private Type baseType;
43 private Class unknownTypeHandler;
44
45 public VirtualBaseConstructor(TypeDataBase db, Type baseType, String packageName, Class unknownTypeHandler) {
46 this.db = (HotSpotTypeDataBase)db;
47 map = new HashMap();
48 this.baseType = baseType;
49 this.unknownTypeHandler = unknownTypeHandler;
50 // Try to find mirror types for each of the types. If there isn't
51 // a direct mirror then try to find an instantiable superclass and
52 // treat it as that.
53 for (Iterator iter = db.getTypes(); iter.hasNext(); ) {
54 Type t = (Type) iter.next();
55 Type superType = t;
56 while (superType != null && superType != baseType) {
57 superType = superType.getSuperclass();
58 }
59 if (superType == baseType) {
60 superType = t;
61 Class c = null;
62 while (c == null && superType != null) {
63 try {
64 c = Class.forName(packageName + "." + superType.getName());
65 } catch (Exception e) {
66 }
67 if (c == null) superType = superType.getSuperclass();
68 }
69 if (c == null) {
70 c = unknownTypeHandler;
71 }
72 map.put(t.getName(), c);
73 }
74 }
75 }
76
77 /** Instantiate the most-precisely typed wrapper object available
78 for the type of the given Address. If no type in the mapping
79 matched the type of the Address, throws a WrongTypeException.
80 Returns null for a null address (similar behavior to
81 VMObjectFactory). */
82 public VMObject instantiateWrapperFor(Address addr) throws WrongTypeException {
83 if (addr == null) {
84 return null;
85 }
86
87 Type type = db.findDynamicTypeForAddress(addr, baseType);
88 if (type != null) {
89 return (VMObject) VMObjectFactory.newObject((Class) map.get(type.getName()), addr);
90 } else if (unknownTypeHandler != null) {
91 return (VMObject) VMObjectFactory.newObject(unknownTypeHandler, addr);
92 }
93
94 throw newWrongTypeException(addr);
95 }
96 }