1 import com.sun.xml.internal.ws.org.objectweb.asm.*;
























   2 
   3 class Asmator {
   4     static byte[] fixup(byte[] buf) throws java.io.IOException {
   5         ClassReader cr = new ClassReader(buf);
   6         ClassWriter cw = new ClassWriter(0) {

   7             public MethodVisitor visitMethod(
   8                 final int access,
   9                 final String name,
  10                 final String desc,
  11                 final String signature,
  12                 final String[] exceptions)
  13             {
  14                 MethodVisitor mv = super.visitMethod(access,
  15                         name,
  16                         desc,
  17                         signature,
  18                         exceptions);
  19                 if (mv == null)  return null;
  20                 if (name.equals("callme")) {
  21                     // make receiver go dead!
  22                     mv.visitInsn(Opcodes.ACONST_NULL);
  23                     mv.visitVarInsn(Opcodes.ASTORE, 0);
  24                 }
  25                 return mv;
  26             }
  27         };
  28         cr.accept(cw, 0);
  29         return cw.toByteArray();
  30     }
  31 }

   1 /*
   2  * Copyright (c) 2012, 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 import jdk.internal.org.objectweb.asm.*;
  26 
  27 class Asmator {
  28     static byte[] fixup(byte[] buf) throws java.io.IOException {
  29         ClassReader cr = new ClassReader(buf);
  30         ClassWriter cw = new ClassWriter(0);
  31         ClassVisitor cv = new ClassVisitor(Opcodes.ASM4, cw) {
  32             public MethodVisitor visitMethod(
  33                 final int access,
  34                 final String name,
  35                 final String desc,
  36                 final String signature,
  37                 final String[] exceptions)
  38             {
  39                 MethodVisitor mv = super.visitMethod(access,
  40                         name,
  41                         desc,
  42                         signature,
  43                         exceptions);
  44                 if (mv == null)  return null;
  45                 if (name.equals("callme")) {
  46                     // make receiver go dead!
  47                     mv.visitInsn(Opcodes.ACONST_NULL);
  48                     mv.visitVarInsn(Opcodes.ASTORE, 0);
  49                 }
  50                 return mv;
  51             }
  52         };
  53         cr.accept(cv, 0);
  54         return cw.toByteArray();
  55     }
  56 }