| /* |
| * Copyright (c) 2002, 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.types.basic; |
| |
| import java.util.*; |
| |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.types.*; |
| |
| public abstract class BasicVtblAccess implements VtblAccess { |
| protected SymbolLookup symbolLookup; |
| protected String[] dllNames; |
| |
| private Map typeToVtblMap = new HashMap(); |
| |
| public BasicVtblAccess(SymbolLookup symbolLookup, |
| String[] dllNames) { |
| this.symbolLookup = symbolLookup; |
| this.dllNames = dllNames; |
| } |
| |
| static Object nullAddress = new Object(); |
| |
| public Address getVtblForType(Type type) { |
| if (type == null) { |
| return null; |
| } |
| Object result = typeToVtblMap.get(type); |
| if (result == nullAddress) { |
| return null; |
| } |
| if (result != null) { |
| return (Address)result; |
| } |
| String vtblSymbol = vtblSymbolForType(type); |
| if (vtblSymbol == null) { |
| typeToVtblMap.put(type, nullAddress); |
| return null; |
| } |
| for (int i = 0; i < dllNames.length; i++) { |
| Address addr = symbolLookup.lookup(dllNames[i], vtblSymbol); |
| if (addr != null) { |
| typeToVtblMap.put(type, addr); |
| return addr; |
| } |
| } |
| typeToVtblMap.put(type, nullAddress); |
| return null; |
| } |
| |
| public void clearCaches() { |
| typeToVtblMap.clear(); |
| } |
| |
| protected abstract String vtblSymbolForType(Type type); |
| } |