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annotate agent/src/share/classes/sun/jvm/hotspot/runtime/VirtualConstructor.java @ 2245:638119ce7cfd
7009309: JSR 292: compiler/6991596/Test6991596.java crashes on fastdebug JDK7/b122
Reviewed-by: kvn, never
author | twisti |
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date | Tue, 01 Feb 2011 03:38:44 -0800 |
parents | c18cbe5936b8 |
children | f6f3bb0ee072 |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2000, 2005, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 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.*; | |
30 import sun.jvm.hotspot.types.*; | |
31 | |
32 /** This class provides generalized "virtual constructor" | |
33 functionality for VMObjects. In simple terms, it creates | |
34 correctly-typed Java wrapper objects for underlying Addresses, | |
35 using the "RTTI-like" functionality of TypeDataBase. For example, | |
36 if the given Address really is a DefNewGeneration*, the Java object | |
37 created for it will be of type | |
38 sun.jvm.hotspot.memory.DefNewGeneration, assuming the mapping from | |
39 type "DefNewGeneration" to class | |
40 sun.jvm.hotspot.memory.DefNewGeneration has been set up. */ | |
41 | |
42 public class VirtualConstructor { | |
43 private TypeDataBase db; | |
44 private Map map; // Map<String, Class> | |
45 | |
46 public VirtualConstructor(TypeDataBase db) { | |
47 this.db = db; | |
48 map = new HashMap(); | |
49 } | |
50 | |
51 /** Adds a mapping from the given C++ type name to the given Java | |
52 class. The latter must be a subclass of | |
53 sun.jvm.hotspot.runtime.VMObject. Returns false if there was | |
54 already a class for this type name in the map. */ | |
55 public boolean addMapping(String cTypeName, Class clazz) { | |
56 if (map.get(cTypeName) != null) { | |
57 return false; | |
58 } | |
59 | |
60 map.put(cTypeName, clazz); | |
61 return true; | |
62 } | |
63 | |
64 /** Instantiate the most-precisely typed wrapper object available | |
65 for the type of the given Address. If no type in the mapping | |
66 matched the type of the Address, throws a WrongTypeException. | |
67 Returns null for a null address (similar behavior to | |
68 VMObjectFactory). */ | |
69 public VMObject instantiateWrapperFor(Address addr) throws WrongTypeException { | |
70 if (addr == null) { | |
71 return null; | |
72 } | |
73 | |
74 for (Iterator iter = map.keySet().iterator(); iter.hasNext(); ) { | |
75 String typeName = (String) iter.next(); | |
76 if (db.addressTypeIsEqualToType(addr, db.lookupType(typeName))) { | |
77 return (VMObject) VMObjectFactory.newObject((Class) map.get(typeName), addr); | |
78 } | |
79 } | |
80 | |
81 String message = "No suitable match for type of address " + addr; | |
82 CDebugger cdbg = VM.getVM().getDebugger().getCDebugger(); | |
83 if (cdbg != null) { | |
84 // Most common case: V-table pointer is the first field | |
85 Address vtblPtr = addr.getAddressAt(0); | |
86 LoadObject lo = cdbg.loadObjectContainingPC(vtblPtr); | |
87 if (lo != null) { | |
88 ClosestSymbol symbol = lo.closestSymbolToPC(vtblPtr); | |
89 if (symbol != null) { | |
90 message += " (nearest symbol is " + symbol.getName() + ")"; | |
91 } | |
92 } | |
93 } | |
94 | |
95 throw new WrongTypeException(message); | |
96 } | |
97 } |