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view agent/src/share/classes/sun/jvm/hotspot/types/basic/VtblAccess.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | c18cbe5936b8 |
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/* * Copyright 2000-2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ package sun.jvm.hotspot.types.basic; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.types.*; /** This interface is designed to allow a platform-specific implementation of the TypeDataBase.isOfType() method, while leaving the rest of the basic.* package platform independent. */ public interface VtblAccess { /** This is the necessarily platform-specific implementation. Attempt to return the address of the vtbl for the given polymorphic C++ type. This value will be used when searching nearby memory to implement isOfType() in as platform-independent a manner as possible. Returns null if this value was not available for the given type, which might indicate that the type was not polymorphic or that an error occurred while trying to find the symbol. Note that this method does not support multiple inheritance. */ public Address getVtblForType(Type type); /** Clear any cached values from symbol lookups in the target process. It is important that this mechanism be fast and for that reason the default implementation memoizes type-to-vtbl mappings. However, if the target process is resumed, these mappings may become invalid. */ public void clearCaches(); }