Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/runtime/VirtualBaseConstructor.java @ 7353:b5280041f59e
Experiment with soft alignment for branch targets.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sun, 13 Jan 2013 19:32:16 +0100 |
parents | da91efe96a93 |
children |
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/* * Copyright (c) 2000, 2012, 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; if (packageName != null) { // 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); } } } } /** Adds a mapping from the given C++ type name to the given Java class. The latter must be a subclass of sun.jvm.hotspot.runtime.VMObject. Returns false if there was already a class for this type name in the map. */ public boolean addMapping(String cTypeName, Class clazz) { if (map.get(cTypeName) != null) { return false; } map.put(cTypeName, clazz); return true; } /** 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 T instantiateWrapperFor(Address addr) throws WrongTypeException { if (addr == null) { return null; } Type type = db.findDynamicTypeForAddress(addr, baseType); if (type != null) { return (T) VMObjectFactory.newObject((Class) map.get(type.getName()), addr); } else if (unknownTypeHandler != null) { return (T) VMObjectFactory.newObject(unknownTypeHandler, addr); } throw newWrongTypeException(addr); } }