src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/LinuxVtblAccess.java

/*
 * Copyright (c) 2002, 2013, 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
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package sun.jvm.hotspot;

import sun.jvm.hotspot.debugger.SymbolLookup;
import sun.jvm.hotspot.types.Type;
import sun.jvm.hotspot.types.basic.BasicVtblAccess;

public class LinuxVtblAccess extends BasicVtblAccess {
  private String vt;

  public LinuxVtblAccess(SymbolLookup symbolLookup,
                         String[] dllNames) {
    super(symbolLookup, dllNames);

    if (symbolLookup.lookup("libjvm.so", "__vt_10JavaThread") != null) {
       // old C++ ABI
       vt = "__vt_";
    } else {
       // new C++ ABI
       vt = "_ZTV";
    }
  }

  protected String vtblSymbolForType(Type type) {
    return vt + type.getName().length() + type;
  }
}