Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/runtime/InstanceConstructor.java @ 19491:4d66c000d253
Truffle/Instrumentation: more cleanup in Probe
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Wed, 18 Feb 2015 18:30:49 -0800 |
parents | f6f3bb0ee072 |
children |
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/* * Copyright (c) 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; /** Given a pointer to some memory return an appropriate wrapper. Various subclasses provide different mechanisms for identifying the appropriate wrapper. */ abstract public class InstanceConstructor<T> { /** 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). */ abstract public T instantiateWrapperFor(Address addr) throws WrongTypeException; protected WrongTypeException newWrongTypeException(Address 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() + ")"; } } } return new WrongTypeException(message); } }