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 }