Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/runtime/VirtualBaseConstructor.java @ 3945:8ed53447f690
Merge
author | iveresov |
---|---|
date | Thu, 15 Sep 2011 12:44:09 -0700 |
parents | f6f3bb0ee072 |
children | da91efe96a93 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/runtime/VirtualBaseConstructor.java Thu Sep 15 12:44:09 2011 -0700 @@ -0,0 +1,96 @@ +/* + * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +package sun.jvm.hotspot.runtime; + +import java.util.*; +import sun.jvm.hotspot.debugger.*; +import sun.jvm.hotspot.debugger.cdbg.CDebugger; +import sun.jvm.hotspot.debugger.cdbg.ClosestSymbol; +import sun.jvm.hotspot.debugger.cdbg.LoadObject; +import sun.jvm.hotspot.types.*; +import sun.jvm.hotspot.HotSpotTypeDataBase; + +/** This provides a factory to create instances where the base virtual + * type is know and the expected subclasses are within a particular + * package. */ + +public class VirtualBaseConstructor<T> extends InstanceConstructor { + private TypeDataBase db; + private HashMap map; // Map<String, Class> + private Type baseType; + private Class unknownTypeHandler; + + public VirtualBaseConstructor(TypeDataBase db, Type baseType, String packageName, Class unknownTypeHandler) { + this.db = (HotSpotTypeDataBase)db; + map = new HashMap(); + this.baseType = baseType; + this.unknownTypeHandler = unknownTypeHandler; + // Try to find mirror types for each of the types. If there isn't + // a direct mirror then try to find an instantiable superclass and + // treat it as that. + for (Iterator iter = db.getTypes(); iter.hasNext(); ) { + Type t = (Type) iter.next(); + Type superType = t; + while (superType != null && superType != baseType) { + superType = superType.getSuperclass(); + } + if (superType == baseType) { + superType = t; + Class c = null; + while (c == null && superType != null) { + try { + c = Class.forName(packageName + "." + superType.getName()); + } catch (Exception e) { + } + if (c == null) superType = superType.getSuperclass(); + } + if (c == null) { + c = unknownTypeHandler; + } + map.put(t.getName(), c); + } + } + } + + /** Instantiate the most-precisely typed wrapper object available + for the type of the given Address. If no type in the mapping + matched the type of the Address, throws a WrongTypeException. + Returns null for a null address (similar behavior to + VMObjectFactory). */ + public VMObject instantiateWrapperFor(Address addr) throws WrongTypeException { + if (addr == null) { + return null; + } + + Type type = db.findDynamicTypeForAddress(addr, baseType); + if (type != null) { + return (VMObject) VMObjectFactory.newObject((Class) map.get(type.getName()), addr); + } else if (unknownTypeHandler != null) { + return (VMObject) VMObjectFactory.newObject(unknownTypeHandler, addr); + } + + throw newWrongTypeException(addr); + } +}