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1   /*
2    * Copyright (c) 2002, 2013, 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;
26  
27  import sun.jvm.hotspot.debugger.SymbolLookup;
28  import sun.jvm.hotspot.types.Type;
29  import sun.jvm.hotspot.types.basic.BasicVtblAccess;
30  
31  public class LinuxVtblAccess extends BasicVtblAccess {
32    private String vt;
33  
34    public LinuxVtblAccess(SymbolLookup symbolLookup,
35                           String[] dllNames) {
36      super(symbolLookup, dllNames);
37  
38      if (symbolLookup.lookup("libjvm.so", "__vt_10JavaThread") != null) {
39         // old C++ ABI
40         vt = "__vt_";
41      } else {
42         // new C++ ABI
43         vt = "_ZTV";
44      }
45    }
46  
47    protected String vtblSymbolForType(Type type) {
48      return vt + type.getName().length() + type;
49    }
50  }