Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/VirtualBaseConstructor.java @ 6972:bd7a7ce2e264
6830717: replay of compilations would help with debugging
Summary: When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method.
Reviewed-by: kvn, twisti, sspitsyn
Contributed-by: yumin.qi@oracle.com
| author | minqi |
|---|---|
| date | Mon, 12 Nov 2012 14:03:53 -0800 |
| parents | da91efe96a93 |
| children |
| rev | line source |
|---|---|
| 3939 | 1 /* |
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2 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. |
| 3939 | 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; | |
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50 if (packageName != null) { |
| 3939 | 51 // Try to find mirror types for each of the types. If there isn't |
| 52 // a direct mirror then try to find an instantiable superclass and | |
| 53 // treat it as that. | |
| 54 for (Iterator iter = db.getTypes(); iter.hasNext(); ) { | |
| 55 Type t = (Type) iter.next(); | |
| 56 Type superType = t; | |
| 57 while (superType != null && superType != baseType) { | |
| 58 superType = superType.getSuperclass(); | |
| 59 } | |
| 60 if (superType == baseType) { | |
| 61 superType = t; | |
| 62 Class c = null; | |
| 63 while (c == null && superType != null) { | |
| 64 try { | |
| 65 c = Class.forName(packageName + "." + superType.getName()); | |
| 66 } catch (Exception e) { | |
| 67 } | |
| 68 if (c == null) superType = superType.getSuperclass(); | |
| 69 } | |
| 70 if (c == null) { | |
| 71 c = unknownTypeHandler; | |
| 72 } | |
| 73 map.put(t.getName(), c); | |
| 74 } | |
| 75 } | |
| 76 } | |
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77 } |
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78 |
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79 /** Adds a mapping from the given C++ type name to the given Java |
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80 class. The latter must be a subclass of |
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81 sun.jvm.hotspot.runtime.VMObject. Returns false if there was |
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82 already a class for this type name in the map. */ |
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83 public boolean addMapping(String cTypeName, Class clazz) { |
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84 if (map.get(cTypeName) != null) { |
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85 return false; |
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86 } |
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87 |
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88 map.put(cTypeName, clazz); |
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89 return true; |
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90 } |
| 3939 | 91 |
| 92 /** Instantiate the most-precisely typed wrapper object available | |
| 93 for the type of the given Address. If no type in the mapping | |
| 94 matched the type of the Address, throws a WrongTypeException. | |
| 95 Returns null for a null address (similar behavior to | |
| 96 VMObjectFactory). */ | |
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97 public T instantiateWrapperFor(Address addr) throws WrongTypeException { |
| 3939 | 98 if (addr == null) { |
| 99 return null; | |
| 100 } | |
| 101 | |
| 102 Type type = db.findDynamicTypeForAddress(addr, baseType); | |
| 103 if (type != null) { | |
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104 return (T) VMObjectFactory.newObject((Class) map.get(type.getName()), addr); |
| 3939 | 105 } else if (unknownTypeHandler != null) { |
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106 return (T) VMObjectFactory.newObject(unknownTypeHandler, addr); |
| 3939 | 107 } |
| 108 | |
| 109 throw newWrongTypeException(addr); | |
| 110 } | |
| 111 } |