1 /* 2 * Copyright (c) 2000, 2002, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 package sun.jvm.hotspot.types.basic; 26 27 import sun.jvm.hotspot.debugger.*; 28 import sun.jvm.hotspot.types.*; 29 30 /** This interface is designed to allow a platform-specific 31 implementation of the TypeDataBase.isOfType() method, while 32 leaving the rest of the basic.* package platform independent. */ 33 34 public interface VtblAccess { 35 /** This is the necessarily platform-specific implementation. 36 Attempt to return the address of the vtbl for the given 37 polymorphic C++ type. This value will be used when searching 38 nearby memory to implement isOfType() in as platform-independent 39 a manner as possible. Returns null if this value was not 40 available for the given type, which might indicate that the type 41 was not polymorphic or that an error occurred while trying to 42 find the symbol. Note that this method does not support multiple 43 inheritance. */ getVtblForType(Type type)44 public Address getVtblForType(Type type); 45 46 /** Clear any cached values from symbol lookups in the target 47 process. It is important that this mechanism be fast and for 48 that reason the default implementation memoizes type-to-vtbl 49 mappings. However, if the target process is resumed, these 50 mappings may become invalid. */ clearCaches()51 public void clearCaches(); 52 } 53