Mercurial > hg > graal-compiler
view agent/src/share/classes/sun/jvm/hotspot/runtime/VirtualConstructor.java @ 1602:136b78722a08
6939203: JSR 292 needs method handle constants
Summary: Add new CP types CONSTANT_MethodHandle, CONSTANT_MethodType; extend 'ldc' bytecode.
Reviewed-by: twisti, never
author | jrose |
---|---|
date | Wed, 09 Jun 2010 18:50:45 -0700 |
parents | c18cbe5936b8 |
children | f6f3bb0ee072 |
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/* * Copyright (c) 2000, 2005, 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.*; import sun.jvm.hotspot.types.*; /** This class provides generalized "virtual constructor" functionality for VMObjects. In simple terms, it creates correctly-typed Java wrapper objects for underlying Addresses, using the "RTTI-like" functionality of TypeDataBase. For example, if the given Address really is a DefNewGeneration*, the Java object created for it will be of type sun.jvm.hotspot.memory.DefNewGeneration, assuming the mapping from type "DefNewGeneration" to class sun.jvm.hotspot.memory.DefNewGeneration has been set up. */ public class VirtualConstructor { private TypeDataBase db; private Map map; // Map<String, Class> public VirtualConstructor(TypeDataBase db) { this.db = db; map = new HashMap(); } /** 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 VMObject instantiateWrapperFor(Address addr) throws WrongTypeException { if (addr == null) { return null; } for (Iterator iter = map.keySet().iterator(); iter.hasNext(); ) { String typeName = (String) iter.next(); if (db.addressTypeIsEqualToType(addr, db.lookupType(typeName))) { return (VMObject) VMObjectFactory.newObject((Class) map.get(typeName), addr); } } String message = "No suitable match for type of address " + addr; CDebugger cdbg = VM.getVM().getDebugger().getCDebugger(); if (cdbg != null) { // Most common case: V-table pointer is the first field Address vtblPtr = addr.getAddressAt(0); LoadObject lo = cdbg.loadObjectContainingPC(vtblPtr); if (lo != null) { ClosestSymbol symbol = lo.closestSymbolToPC(vtblPtr); if (symbol != null) { message += " (nearest symbol is " + symbol.getName() + ")"; } } } throw new WrongTypeException(message); } }