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Java 8 带Java 1.8的ASM 5.0.3带Java.lang的maxStack不正确。VerifyError:操作数堆栈溢出

java-8

Java 8 带Java 1.8的ASM 5.0.3带Java.lang的maxStack不正确。VerifyError:操作数堆栈溢出,java-8,bytecode,java-bytecode-asm,Java 8,Bytecode,Java Bytecode Asm,使用ASM5.0.3（使用Java1.8.0_65和Tomcat8.0.30），访问JSP（date.JSP）方法之一-JSP（jspService），获得以下异常 javax.servlet.ServletException: java.lang.VerifyError: Operand stack overflow Exception Details: Location: org/apache/jsp/jsp/dates/date_jsp._jspService(Ljavax/s

使用ASM5.0.3（使用Java1.8.0_65和Tomcat8.0.30），访问JSP（date.JSP）方法之一-JSP（jspService），获得以下异常

javax.servlet.ServletException: java.lang.VerifyError: Operand stack overflow
Exception Details:
  Location:
    org/apache/jsp/jsp/dates/date_jsp._jspService(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V @0: aload_1
  Reason:
    Exceeded max stack size.
  Current Frame:
    bci: @0
    flags: { }
    locals: { 'org/apache/jsp/jsp/dates/date_jsp', 'javax/servlet/http/HttpServletRequest', 'javax/servlet/http/HttpServletResponse' }
    stack: { }
  Bytecode: .......................
注意：我没有更改方法的字节码，只是使用ASM5.0.3的MethodVisitor类访问方法

date.jsp 注意：编译的JSP类版本是51，因此ASM使用
ClassWriter.COMPUTE\u FRAMES
和
ClassReader.SKIP\u FRAMES

MiniJSPClassVisitor.java 我打印了类的字节码-
org/apache/jsp/jsp/dates/date\u jsp
，使用TraceClassVisitor

pw = new PrintWriter(homeFolder + File.separator + "date.log");
ClassReader cr = new ClassReader(classfileBuffer);
cr.accept(new TraceClassVisitor(null, new ASMifier(), pw), ClassReader.EXPAND_FRAMES);
似乎ASM在访问_jsp服务方法-
mv.visitmax（0,10）
而不是
mv.visitmax（8,10）

附加了带有正确maxstack的屏幕截图

错误的最大堆栈

为了便于参考，附上了_jspService方法的编译版本

public void _jspService(final javax.servlet.http.HttpServletRequest request, final javax.servlet.http.HttpServletResponse response)
        throws java.io.IOException, javax.servlet.ServletException {

final java.lang.String _jspx_method = request.getMethod();
if (!"GET".equals(_jspx_method) && !"POST".equals(_jspx_method) && !"HEAD".equals(_jspx_method) && !javax.servlet.DispatcherType.ERROR.equals(request.getDispatcherType())) {
response.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED, "JSPs only permit GET POST or HEAD");
return;
}

    final javax.servlet.jsp.PageContext pageContext;
    final javax.servlet.ServletContext application;
    final javax.servlet.ServletConfig config;
    javax.servlet.jsp.JspWriter out = null;
    final java.lang.Object page = this;
    javax.servlet.jsp.JspWriter _jspx_out = null;
    javax.servlet.jsp.PageContext _jspx_page_context = null;


    try {
      response.setContentType("text/html");
      pageContext = _jspxFactory.getPageContext(this, request, response,
                null, false, 8192, true);
      _jspx_page_context = pageContext;
      application = pageContext.getServletContext();
      config = pageContext.getServletConfig();
      out = pageContext.getOut();
      _jspx_out = out;

      out.write("\r\n");
      out.write("<html>\r\n");
      out.write("\r\n");
      out.write("\r\n");
      out.write("\r\n");
      out.write("<body>\r\n");
      dates.JspCalendar clock = null;
      clock = (dates.JspCalendar) _jspx_page_context.getAttribute("clock", javax.servlet.jsp.PageContext.PAGE_SCOPE);
      if (clock == null){
        clock = new dates.JspCalendar();
        _jspx_page_context.setAttribute("clock", clock, javax.servlet.jsp.PageContext.PAGE_SCOPE);
      }
      out.write("\r\n");
      out.write("\r\n");
      out.write("\r\n");
      out.write("\r\n");
      out.write("</body>\r\n");
      out.write("</html>\r\n");
    } catch (java.lang.Throwable t) {
      if (!(t instanceof javax.servlet.jsp.SkipPageException)){
        out = _jspx_out;
        if (out != null && out.getBufferSize() != 0)
          try {
            if (response.isCommitted()) {
              out.flush();
            } else {
              out.clearBuffer();
            }
          } catch (java.io.IOException e) {}
        if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
        else throw new ServletException(t);
      }
    } finally {
      _jspxFactory.releasePageContext(_jspx_page_context);
    }
  }
}

public void\u jsp服务（最终javax.servlet.http.HttpServletRequest请求，最终javax.servlet.http.HttpServletResponse响应）
抛出java.io.IOException、javax.servlet.ServletException{
final java.lang.String_jspx_method=request.getMethod（）；
如果（！“GET”.equals（_jspx_方法）和（！“POST.equals（_jspx_方法）和&！“HEAD.equals（_jspx_方法）和&！javax.servlet.DispatcherType.ERROR.equals（request.getDispatcherType（））{
sendError（不允许使用HttpServletResponse.SC_方法，“JSP仅允许获取POST或HEAD”）；
返回；
}
最终的javax.servlet.jsp.PageContext；
最终的javax.servlet.ServletContext应用程序；
最终的javax.servlet.ServletConfig配置；
javax.servlet.jsp.JspWriter out=null；
最终java.lang.Object页面=此；
javax.servlet.jsp.JspWriter_jspx_out=null；
javax.servlet.jsp.PageContext\u jspx\u page\u context=null；
试一试{
response.setContentType（“text/html”）；
pageContext=\u jspxFactory.getPageContext（此、请求、响应、，
空、假、8192、真）；
_jspx_page_context=pageContext；
application=pageContext.getServletContext（）；
config=pageContext.getServletConfig（）；
out=pageContext.getOut（）；
_jspx_out=out；
out.write（“\r\n”）；
out.write（“\r\n”）；
out.write（“\r\n”）；
out.write（“\r\n”）；
out.write（“\r\n”）；
out.write（“\r\n”）；
dates.JspCalendar clock=null；
clock=（dates.JspCalendar）_jspx_page_context.getAttribute（“clock”，javax.servlet.jsp.PageContext.page_SCOPE）；
如果（时钟==null）{
时钟=新日期。JspCalendar（）；
_jspx_page_context.setAttribute（“clock”，clock，javax.servlet.jsp.PageContext.page_SCOPE）；
}
out.write（“\r\n”）；
out.write（“\r\n”）；
out.write（“\r\n”）；
out.write（“\r\n”）；
out.write（“\r\n”）；
out.write（“\r\n”）；
}catch（java.lang.Throwable t）{
if（！（javax.servlet.jsp.SkipPageException的t instanceof）{
out=_jspx_out；
if（out！=null&&out.getBufferSize（）！=0）
试一试{
if（response.isCommitted（））{
out.flush（）；
}否则{
out.clearBuffer（）；
}
}catch（java.io.ioe）{}
如果（_jspx_page_context！=null）_jspx_page_context.handlePageException（t）；
否则抛出新的ServletException（t）；
}
}最后{
_releasePageContext（_jspx_page_context）；
}
}
}
如何解决声明JSP Bean时发生的java.lang.VerifyError？ （或） 需要在ASM方面做些什么来克服这个问题？。提前谢谢

注意：

同样的代码也适用于Java6和Tomcat6

编辑#1，霍尔格附加了方法"jspService"的字节码

{
mv = cw.visitMethod(ACC_PUBLIC, "_jspService", "(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V", null, new String[] { "java/io/IOException", "javax/servlet/ServletException" });
mv.visitCode();
Label l0 = new Label();
Label l1 = new Label();
Label l2 = new Label();
mv.visitTryCatchBlock(l0, l1, l2, "java/lang/Throwable");
Label l3 = new Label();
Label l4 = new Label();
Label l5 = new Label();
mv.visitTryCatchBlock(l3, l4, l5, "java/io/IOException");
Label l6 = new Label();
Label l7 = new Label();
mv.visitTryCatchBlock(l0, l6, l7, null);
Label l8 = new Label();
mv.visitLabel(l8);
mv.visitLineNumber(82, l8);
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(INVOKEINTERFACE, "javax/servlet/http/HttpServletRequest", "getMethod", "()Ljava/lang/String;", true);
mv.visitVarInsn(ASTORE, 3);
Label l9 = new Label();
mv.visitLabel(l9);
mv.visitLineNumber(83, l9);
mv.visitLdcInsn("GET");
mv.visitVarInsn(ALOAD, 3);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
Label l10 = new Label();
mv.visitJumpInsn(IFNE, l10);
mv.visitLdcInsn("POST");
mv.visitVarInsn(ALOAD, 3);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
mv.visitJumpInsn(IFNE, l10);
mv.visitLdcInsn("HEAD");
mv.visitVarInsn(ALOAD, 3);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
mv.visitJumpInsn(IFNE, l10);
mv.visitFieldInsn(GETSTATIC, "javax/servlet/DispatcherType", "ERROR", "Ljavax/servlet/DispatcherType;");
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(INVOKEINTERFACE, "javax/servlet/http/HttpServletRequest", "getDispatcherType", "()Ljavax/servlet/DispatcherType;", true);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/DispatcherType", "equals", "(Ljava/lang/Object;)Z", false);
mv.visitJumpInsn(IFNE, l10);
Label l11 = new Label();
mv.visitLabel(l11);
mv.visitLineNumber(84, l11);
mv.visitVarInsn(ALOAD, 2);
mv.visitIntInsn(SIPUSH, 405);
mv.visitLdcInsn("JSPs only permit GET POST or HEAD");
mv.visitMethodInsn(INVOKEINTERFACE, "javax/servlet/http/HttpServletResponse", "sendError", "(ILjava/lang/String;)V", true);
Label l12 = new Label();
mv.visitLabel(l12);
mv.visitLineNumber(85, l12);
mv.visitInsn(RETURN);
mv.visitLabel(l10);
mv.visitLineNumber(91, l10);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 5);
Label l13 = new Label();
mv.visitLabel(l13);
mv.visitLineNumber(93, l13);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 6);
Label l14 = new Label();
mv.visitLabel(l14);
mv.visitLineNumber(94, l14);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 7);
mv.visitLabel(l0);
mv.visitLineNumber(98, l0);
mv.visitVarInsn(ALOAD, 2);
mv.visitLdcInsn("text/html");
mv.visitMethodInsn(INVOKEINTERFACE, "javax/servlet/http/HttpServletResponse", "setContentType", "(Ljava/lang/String;)V", true);
Label l15 = new Label();
mv.visitLabel(l15);
mv.visitLineNumber(99, l15);
mv.visitFieldInsn(GETSTATIC, "org/apache/jsp/jsp/dates/date_jsp", "_jspxFactory", "Ljavax/servlet/jsp/JspFactory;");
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 2);
Label l16 = new Label();
mv.visitLabel(l16);
mv.visitLineNumber(100, l16);
mv.visitInsn(ACONST_NULL);
mv.visitInsn(ICONST_0);
mv.visitIntInsn(SIPUSH, 8192);
mv.visitInsn(ICONST_1);
Label l17 = new Label();
mv.visitLabel(l17);
mv.visitLineNumber(99, l17);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspFactory", "getPageContext", "(Ljavax/servlet/Servlet;Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;Ljava/lang/String;ZIZ)Ljavax/servlet/jsp/PageContext;", false);
mv.visitVarInsn(ASTORE, 4);
Label l18 = new Label();
mv.visitLabel(l18);
mv.visitLineNumber(101, l18);
mv.visitVarInsn(ALOAD, 4);
mv.visitVarInsn(ASTORE, 7);
Label l19 = new Label();
mv.visitLabel(l19);
mv.visitLineNumber(102, l19);
mv.visitVarInsn(ALOAD, 4);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/PageContext", "getServletContext", "()Ljavax/servlet/ServletContext;", false);
mv.visitInsn(POP);
Label l20 = new Label();
mv.visitLabel(l20);
mv.visitLineNumber(103, l20);
mv.visitVarInsn(ALOAD, 4);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/PageContext", "getServletConfig", "()Ljavax/servlet/ServletConfig;", false);
mv.visitInsn(POP);
Label l21 = new Label();
mv.visitLabel(l21);
mv.visitLineNumber(104, l21);
mv.visitVarInsn(ALOAD, 4);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/PageContext", "getOut", "()Ljavax/servlet/jsp/JspWriter;", false);
mv.visitVarInsn(ASTORE, 5);
Label l22 = new Label();
mv.visitLabel(l22);
mv.visitLineNumber(105, l22);
mv.visitVarInsn(ALOAD, 5);
mv.visitVarInsn(ASTORE, 6);
Label l23 = new Label();
mv.visitLabel(l23);
mv.visitLineNumber(107, l23);
mv.visitVarInsn(ALOAD, 5);
mv.visitLdcInsn("<html>\r\n");
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "write", "(Ljava/lang/String;)V", false);
Label l24 = new Label();
mv.visitLabel(l24);
mv.visitLineNumber(108, l24);
mv.visitVarInsn(ALOAD, 5);
mv.visitLdcInsn("\r\n");
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "write", "(Ljava/lang/String;)V", false);
Label l25 = new Label();
mv.visitLabel(l25);
mv.visitLineNumber(109, l25);
mv.visitVarInsn(ALOAD, 5);
mv.visitLdcInsn("\u0009<body>\r\n");
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "write", "(Ljava/lang/String;)V", false);
Label l26 = new Label();
mv.visitLabel(l26);
mv.visitLineNumber(110, l26);
mv.visitVarInsn(ALOAD, 5);
mv.visitLdcInsn("\u0009\u0009");
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "write", "(Ljava/lang/String;)V", false);
Label l27 = new Label();
mv.visitLabel(l27);
mv.visitLineNumber(111, l27);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 8);
Label l28 = new Label();
mv.visitLabel(l28);
mv.visitLineNumber(112, l28);
mv.visitVarInsn(ALOAD, 7);
mv.visitLdcInsn("clock");
mv.visitInsn(ICONST_1);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/PageContext", "getAttribute", "(Ljava/lang/String;I)Ljava/lang/Object;", false);
mv.visitTypeInsn(CHECKCAST, "dates/JspCalendar");
mv.visitVarInsn(ASTORE, 8);
Label l29 = new Label();
mv.visitLabel(l29);
mv.visitLineNumber(113, l29);
mv.visitVarInsn(ALOAD, 8);
Label l30 = new Label();
mv.visitJumpInsn(IFNONNULL, l30);
Label l31 = new Label();
mv.visitLabel(l31);
mv.visitLineNumber(114, l31);
mv.visitTypeInsn(NEW, "dates/JspCalendar");
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, "dates/JspCalendar", "<init>", "()V", false);
mv.visitVarInsn(ASTORE, 8);
Label l32 = new Label();
mv.visitLabel(l32);
mv.visitLineNumber(115, l32);
mv.visitVarInsn(ALOAD, 7);
mv.visitLdcInsn("clock");
mv.visitVarInsn(ALOAD, 8);
mv.visitInsn(ICONST_1);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/PageContext", "setAttribute", "(Ljava/lang/String;Ljava/lang/Object;I)V", false);
mv.visitLabel(l30);
mv.visitLineNumber(117, l30);
mv.visitVarInsn(ALOAD, 5);
mv.visitLdcInsn("\r\n");
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "write", "(Ljava/lang/String;)V", false);
Label l33 = new Label();
mv.visitLabel(l33);
mv.visitLineNumber(118, l33);
mv.visitVarInsn(ALOAD, 5);
mv.visitLdcInsn("\u0009</body>\r\n");
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "write", "(Ljava/lang/String;)V", false);
Label l34 = new Label();
mv.visitLabel(l34);
mv.visitLineNumber(119, l34);
mv.visitVarInsn(ALOAD, 5);
mv.visitLdcInsn("</html>\r\n");
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "write", "(Ljava/lang/String;)V", false);
mv.visitLabel(l1);
mv.visitLineNumber(120, l1);
Label l35 = new Label();
mv.visitJumpInsn(GOTO, l35);
mv.visitLabel(l2);
mv.visitVarInsn(ASTORE, 8);
Label l36 = new Label();
mv.visitLabel(l36);
mv.visitLineNumber(121, l36);
mv.visitVarInsn(ALOAD, 8);
mv.visitTypeInsn(INSTANCEOF, "javax/servlet/jsp/SkipPageException");
mv.visitJumpInsn(IFNE, l6);
Label l37 = new Label();
mv.visitLabel(l37);
mv.visitLineNumber(122, l37);
mv.visitVarInsn(ALOAD, 6);
mv.visitVarInsn(ASTORE, 5);
Label l38 = new Label();
mv.visitLabel(l38);
mv.visitLineNumber(123, l38);
mv.visitVarInsn(ALOAD, 5);
Label l39 = new Label();
mv.visitJumpInsn(IFNULL, l39);
mv.visitVarInsn(ALOAD, 5);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "getBufferSize", "()I", false);
mv.visitJumpInsn(IFEQ, l39);
mv.visitLabel(l3);
mv.visitLineNumber(125, l3);
mv.visitVarInsn(ALOAD, 2);
mv.visitMethodInsn(INVOKEINTERFACE, "javax/servlet/http/HttpServletResponse", "isCommitted", "()Z", true);
Label l40 = new Label();
mv.visitJumpInsn(IFEQ, l40);
Label l41 = new Label();
mv.visitLabel(l41);
mv.visitLineNumber(126, l41);
mv.visitVarInsn(ALOAD, 5);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "flush", "()V", false);
Label l42 = new Label();
mv.visitLabel(l42);
mv.visitLineNumber(127, l42);
mv.visitJumpInsn(GOTO, l39);
mv.visitLabel(l40);
mv.visitLineNumber(128, l40);
mv.visitVarInsn(ALOAD, 5);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "clearBuffer", "()V", false);
mv.visitLabel(l4);
mv.visitLineNumber(130, l4);
mv.visitJumpInsn(GOTO, l39);
mv.visitLabel(l5);
mv.visitInsn(POP);
mv.visitLabel(l39);
mv.visitLineNumber(131, l39);
mv.visitVarInsn(ALOAD, 7);
Label l43 = new Label();
mv.visitJumpInsn(IFNULL, l43);
mv.visitVarInsn(ALOAD, 7);
mv.visitVarInsn(ALOAD, 8);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/PageContext", "handlePageException", "(Ljava/lang/Throwable;)V", false);
mv.visitJumpInsn(GOTO, l6);
mv.visitLabel(l43);
mv.visitLineNumber(132, l43);
mv.visitTypeInsn(NEW, "javax/servlet/ServletException");
mv.visitInsn(DUP);
mv.visitVarInsn(ALOAD, 8);
mv.visitMethodInsn(INVOKESPECIAL, "javax/servlet/ServletException", "<init>", "(Ljava/lang/Throwable;)V", false);
mv.visitInsn(ATHROW);
mv.visitLabel(l6);
mv.visitLineNumber(135, l6);
mv.visitFieldInsn(GETSTATIC, "org/apache/jsp/jsp/dates/date_jsp", "_jspxFactory", "Ljavax/servlet/jsp/JspFactory;");
mv.visitVarInsn(ALOAD, 7);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspFactory", "releasePageContext", "(Ljavax/servlet/jsp/PageContext;)V", false);
Label l44 = new Label();
mv.visitJumpInsn(GOTO, l44);
mv.visitLabel(l7);
mv.visitLineNumber(134, l7);
mv.visitVarInsn(ASTORE, 9);
Label l45 = new Label();
mv.visitLabel(l45);
mv.visitLineNumber(135, l45);
mv.visitFieldInsn(GETSTATIC, "org/apache/jsp/jsp/dates/date_jsp", "_jspxFactory", "Ljavax/servlet/jsp/JspFactory;");
mv.visitVarInsn(ALOAD, 7);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspFactory", "releasePageContext", "(Ljavax/servlet/jsp/PageContext;)V", false);
Label l46 = new Label();
mv.visitLabel(l46);
mv.visitLineNumber(136, l46);
mv.visitVarInsn(ALOAD, 9);
mv.visitInsn(ATHROW);
mv.visitLabel(l35);
mv.visitLineNumber(135, l35);
mv.visitFieldInsn(GETSTATIC, "org/apache/jsp/jsp/dates/date_jsp", "_jspxFactory", "Ljavax/servlet/jsp/JspFactory;");
mv.visitVarInsn(ALOAD, 7);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspFactory", "releasePageContext", "(Ljavax/servlet/jsp/PageContext;)V", false);
mv.visitLabel(l44);
mv.visitLineNumber(137, l44);
mv.visitInsn(RETURN);
Label l47 = new Label();
mv.visitLabel(l47);
mv.visitLocalVariable("this", "Lorg/apache/jsp/jsp/dates/date_jsp;", null, l8, l47, 0);
mv.visitLocalVariable("request", "Ljavax/servlet/http/HttpServletRequest;", null, l8, l47, 1);
mv.visitLocalVariable("response", "Ljavax/servlet/http/HttpServletResponse;", null, l8, l47, 2);
mv.visitLocalVariable("_jspx_method", "Ljava/lang/String;", null, l9, l47, 3);
mv.visitLocalVariable("pageContext", "Ljavax/servlet/jsp/PageContext;", null, l18, l1, 4);
mv.visitLocalVariable("out", "Ljavax/servlet/jsp/JspWriter;", null, l13, l47, 5);
mv.visitLocalVariable("_jspx_out", "Ljavax/servlet/jsp/JspWriter;", null, l14, l47, 6);
mv.visitLocalVariable("_jspx_page_context", "Ljavax/servlet/jsp/PageContext;", null, l0, l47, 7);
mv.visitLocalVariable("clock", "Ldates/JspCalendar;", null, l28, l1, 8);
mv.visitLocalVariable("t", "Ljava/lang/Throwable;", null, l36, l6, 8);
mv.visitMaxs(0, 10);
mv.visitEnd();
}

{
mv=cw.visitMethod（ACC_PUBLIC，“_jspService”，”（Ljavax/servlet/http/HttpServletRequest；Ljavax/servlet/http/HttpServletResponse；）V），null，新字符串[]{“java/io/IOException”，“javax/servlet/ServletException”}）；
mv.visitCode（）；
标签l0=新标签（）；
标签l1=新标签（）；
标签l2=新标签（）；
mv.visittrychtblock（l0、l1、l2，“java/lang/Throwable”）；
标签l3=新标签（）；
标签l4=新标签（）；
标签l5=新标签（）；
mv.visittrychtblock（l3、l4、l5，“java/io/IOException”）；
标签l6=新标签（）；
标签l7=新标签（）；
mv.visittrychtblock（l0、l6、l7、null）；
标签l8=新标签（）；
mv.visitLabel（l8）；
mv.visitLineNumber（82，l8）；
mv.visitVarInsn（ALOAD，1）；
mv.visitMethodInsn（INVOKEINTERFACE，“javax/servlet/http/HttpServletRequest”，“getMethod”，“Ljava/lang/String；”，true）；
visitVarInsn mv（ASTORE，3）；
标签l9=新标签（）；
mv.visitLabel（l9）；
mv.visitLineNumber（83，l9）；
mv.visitLdcInsn（“GET”）；
visitVarInsn号mv；
mv.visitMethodInsn（INVOKEVIRTUAL，“java/lang/String”，“equals”，“Ljava/lang/Object；）Z”，false）；
标签l10=新标签（）；
mv.visitJumpInsn（IFNE，l10）；
mv.visitLdcInsn（“职务”）；
visitVarInsn号mv；
mv.visitMethodInsn（INVOKEVIRTUAL，“java/lang/String”，“equals”，“Ljava/lang/Object；）Z”，false）；
mv.visitJumpInsn（IFNE，l10）；
mv.visitLdcInsn（“负责人”）；
visitVarInsn号mv；
mv.visitMethodInsn（INVOKEVIRTUAL，“java/lang/String”，“equals”，“Ljava/lang/Object；）Z”，false）；
mv.visitJumpInsn（IFNE，l10）；
mv.visitFieldInsn（GETSTATIC，“javax/servlet/DispatcherType”，“ERROR”，“Ljavax/servlet/DispatcherType；”）；
mv.visitVarInsn（ALOAD，1）；
mv.visitMethodInsn（INVOKEINTERFACE，“javax/servlet/http/HttpServletRequest”，“getDispatcherType”，“Ljavax/servlet/DispatcherType；”，true）；
mv.visitMethodInsn（INVOKEVIRTUAL，“javax/servlet/DispatcherType”，“equals”，“Ljava/lang/Object；）Z”，false）；
mv.visitJumpInsn（IFNE，l10）；
标签l11=新标签（）；
mv.visitLabel（l11）；
mv.visitLineNumber（84，l11）；
visitVarInsn号mv；
visitIntInsn mv（SIPUSH，405）；
mv.visitLdcInsn（“JSP仅允许获得职位或主管”）；
mv.访问方法（INV）

public class SimpleMethodVisitor extends MethodVisitor {
    private String methodName = null;

    public SimpleMethodVisitor(int api, MethodVisitor mv, String methodName) {
        super(Opcodes.ASM5, mv);
        this.methodName = methodName;
        System.out.println("SimpleMethodVisitor :"+methodName );
    }



pw = new PrintWriter(homeFolder + File.separator + "date.log");
ClassReader cr = new ClassReader(classfileBuffer);
cr.accept(new TraceClassVisitor(null, new ASMifier(), pw), ClassReader.EXPAND_FRAMES);



public void _jspService(final javax.servlet.http.HttpServletRequest request, final javax.servlet.http.HttpServletResponse response)
        throws java.io.IOException, javax.servlet.ServletException {

final java.lang.String _jspx_method = request.getMethod();
if (!"GET".equals(_jspx_method) && !"POST".equals(_jspx_method) && !"HEAD".equals(_jspx_method) && !javax.servlet.DispatcherType.ERROR.equals(request.getDispatcherType())) {
response.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED, "JSPs only permit GET POST or HEAD");
return;
}

    final javax.servlet.jsp.PageContext pageContext;
    final javax.servlet.ServletContext application;
    final javax.servlet.ServletConfig config;
    javax.servlet.jsp.JspWriter out = null;
    final java.lang.Object page = this;
    javax.servlet.jsp.JspWriter _jspx_out = null;
    javax.servlet.jsp.PageContext _jspx_page_context = null;


    try {
      response.setContentType("text/html");
      pageContext = _jspxFactory.getPageContext(this, request, response,
                null, false, 8192, true);
      _jspx_page_context = pageContext;
      application = pageContext.getServletContext();
      config = pageContext.getServletConfig();
      out = pageContext.getOut();
      _jspx_out = out;

      out.write("\r\n");
      out.write("<html>\r\n");
      out.write("\r\n");
      out.write("\r\n");
      out.write("\r\n");
      out.write("<body>\r\n");
      dates.JspCalendar clock = null;
      clock = (dates.JspCalendar) _jspx_page_context.getAttribute("clock", javax.servlet.jsp.PageContext.PAGE_SCOPE);
      if (clock == null){
        clock = new dates.JspCalendar();
        _jspx_page_context.setAttribute("clock", clock, javax.servlet.jsp.PageContext.PAGE_SCOPE);
      }
      out.write("\r\n");
      out.write("\r\n");
      out.write("\r\n");
      out.write("\r\n");
      out.write("</body>\r\n");
      out.write("</html>\r\n");
    } catch (java.lang.Throwable t) {
      if (!(t instanceof javax.servlet.jsp.SkipPageException)){
        out = _jspx_out;
        if (out != null && out.getBufferSize() != 0)
          try {
            if (response.isCommitted()) {
              out.flush();
            } else {
              out.clearBuffer();
            }
          } catch (java.io.IOException e) {}
        if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
        else throw new ServletException(t);
      }
    } finally {
      _jspxFactory.releasePageContext(_jspx_page_context);
    }
  }
}



{
mv = cw.visitMethod(ACC_PUBLIC, "_jspService", "(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V", null, new String[] { "java/io/IOException", "javax/servlet/ServletException" });
mv.visitCode();
Label l0 = new Label();
Label l1 = new Label();
Label l2 = new Label();
mv.visitTryCatchBlock(l0, l1, l2, "java/lang/Throwable");
Label l3 = new Label();
Label l4 = new Label();
Label l5 = new Label();
mv.visitTryCatchBlock(l3, l4, l5, "java/io/IOException");
Label l6 = new Label();
Label l7 = new Label();
mv.visitTryCatchBlock(l0, l6, l7, null);
Label l8 = new Label();
mv.visitLabel(l8);
mv.visitLineNumber(82, l8);
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(INVOKEINTERFACE, "javax/servlet/http/HttpServletRequest", "getMethod", "()Ljava/lang/String;", true);
mv.visitVarInsn(ASTORE, 3);
Label l9 = new Label();
mv.visitLabel(l9);
mv.visitLineNumber(83, l9);
mv.visitLdcInsn("GET");
mv.visitVarInsn(ALOAD, 3);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
Label l10 = new Label();
mv.visitJumpInsn(IFNE, l10);
mv.visitLdcInsn("POST");
mv.visitVarInsn(ALOAD, 3);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
mv.visitJumpInsn(IFNE, l10);
mv.visitLdcInsn("HEAD");
mv.visitVarInsn(ALOAD, 3);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
mv.visitJumpInsn(IFNE, l10);
mv.visitFieldInsn(GETSTATIC, "javax/servlet/DispatcherType", "ERROR", "Ljavax/servlet/DispatcherType;");
mv.visitVarInsn(ALOAD, 1);
mv.visitMethodInsn(INVOKEINTERFACE, "javax/servlet/http/HttpServletRequest", "getDispatcherType", "()Ljavax/servlet/DispatcherType;", true);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/DispatcherType", "equals", "(Ljava/lang/Object;)Z", false);
mv.visitJumpInsn(IFNE, l10);
Label l11 = new Label();
mv.visitLabel(l11);
mv.visitLineNumber(84, l11);
mv.visitVarInsn(ALOAD, 2);
mv.visitIntInsn(SIPUSH, 405);
mv.visitLdcInsn("JSPs only permit GET POST or HEAD");
mv.visitMethodInsn(INVOKEINTERFACE, "javax/servlet/http/HttpServletResponse", "sendError", "(ILjava/lang/String;)V", true);
Label l12 = new Label();
mv.visitLabel(l12);
mv.visitLineNumber(85, l12);
mv.visitInsn(RETURN);
mv.visitLabel(l10);
mv.visitLineNumber(91, l10);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 5);
Label l13 = new Label();
mv.visitLabel(l13);
mv.visitLineNumber(93, l13);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 6);
Label l14 = new Label();
mv.visitLabel(l14);
mv.visitLineNumber(94, l14);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 7);
mv.visitLabel(l0);
mv.visitLineNumber(98, l0);
mv.visitVarInsn(ALOAD, 2);
mv.visitLdcInsn("text/html");
mv.visitMethodInsn(INVOKEINTERFACE, "javax/servlet/http/HttpServletResponse", "setContentType", "(Ljava/lang/String;)V", true);
Label l15 = new Label();
mv.visitLabel(l15);
mv.visitLineNumber(99, l15);
mv.visitFieldInsn(GETSTATIC, "org/apache/jsp/jsp/dates/date_jsp", "_jspxFactory", "Ljavax/servlet/jsp/JspFactory;");
mv.visitVarInsn(ALOAD, 0);
mv.visitVarInsn(ALOAD, 1);
mv.visitVarInsn(ALOAD, 2);
Label l16 = new Label();
mv.visitLabel(l16);
mv.visitLineNumber(100, l16);
mv.visitInsn(ACONST_NULL);
mv.visitInsn(ICONST_0);
mv.visitIntInsn(SIPUSH, 8192);
mv.visitInsn(ICONST_1);
Label l17 = new Label();
mv.visitLabel(l17);
mv.visitLineNumber(99, l17);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspFactory", "getPageContext", "(Ljavax/servlet/Servlet;Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;Ljava/lang/String;ZIZ)Ljavax/servlet/jsp/PageContext;", false);
mv.visitVarInsn(ASTORE, 4);
Label l18 = new Label();
mv.visitLabel(l18);
mv.visitLineNumber(101, l18);
mv.visitVarInsn(ALOAD, 4);
mv.visitVarInsn(ASTORE, 7);
Label l19 = new Label();
mv.visitLabel(l19);
mv.visitLineNumber(102, l19);
mv.visitVarInsn(ALOAD, 4);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/PageContext", "getServletContext", "()Ljavax/servlet/ServletContext;", false);
mv.visitInsn(POP);
Label l20 = new Label();
mv.visitLabel(l20);
mv.visitLineNumber(103, l20);
mv.visitVarInsn(ALOAD, 4);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/PageContext", "getServletConfig", "()Ljavax/servlet/ServletConfig;", false);
mv.visitInsn(POP);
Label l21 = new Label();
mv.visitLabel(l21);
mv.visitLineNumber(104, l21);
mv.visitVarInsn(ALOAD, 4);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/PageContext", "getOut", "()Ljavax/servlet/jsp/JspWriter;", false);
mv.visitVarInsn(ASTORE, 5);
Label l22 = new Label();
mv.visitLabel(l22);
mv.visitLineNumber(105, l22);
mv.visitVarInsn(ALOAD, 5);
mv.visitVarInsn(ASTORE, 6);
Label l23 = new Label();
mv.visitLabel(l23);
mv.visitLineNumber(107, l23);
mv.visitVarInsn(ALOAD, 5);
mv.visitLdcInsn("<html>\r\n");
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "write", "(Ljava/lang/String;)V", false);
Label l24 = new Label();
mv.visitLabel(l24);
mv.visitLineNumber(108, l24);
mv.visitVarInsn(ALOAD, 5);
mv.visitLdcInsn("\r\n");
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "write", "(Ljava/lang/String;)V", false);
Label l25 = new Label();
mv.visitLabel(l25);
mv.visitLineNumber(109, l25);
mv.visitVarInsn(ALOAD, 5);
mv.visitLdcInsn("\u0009<body>\r\n");
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "write", "(Ljava/lang/String;)V", false);
Label l26 = new Label();
mv.visitLabel(l26);
mv.visitLineNumber(110, l26);
mv.visitVarInsn(ALOAD, 5);
mv.visitLdcInsn("\u0009\u0009");
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "write", "(Ljava/lang/String;)V", false);
Label l27 = new Label();
mv.visitLabel(l27);
mv.visitLineNumber(111, l27);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 8);
Label l28 = new Label();
mv.visitLabel(l28);
mv.visitLineNumber(112, l28);
mv.visitVarInsn(ALOAD, 7);
mv.visitLdcInsn("clock");
mv.visitInsn(ICONST_1);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/PageContext", "getAttribute", "(Ljava/lang/String;I)Ljava/lang/Object;", false);
mv.visitTypeInsn(CHECKCAST, "dates/JspCalendar");
mv.visitVarInsn(ASTORE, 8);
Label l29 = new Label();
mv.visitLabel(l29);
mv.visitLineNumber(113, l29);
mv.visitVarInsn(ALOAD, 8);
Label l30 = new Label();
mv.visitJumpInsn(IFNONNULL, l30);
Label l31 = new Label();
mv.visitLabel(l31);
mv.visitLineNumber(114, l31);
mv.visitTypeInsn(NEW, "dates/JspCalendar");
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, "dates/JspCalendar", "<init>", "()V", false);
mv.visitVarInsn(ASTORE, 8);
Label l32 = new Label();
mv.visitLabel(l32);
mv.visitLineNumber(115, l32);
mv.visitVarInsn(ALOAD, 7);
mv.visitLdcInsn("clock");
mv.visitVarInsn(ALOAD, 8);
mv.visitInsn(ICONST_1);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/PageContext", "setAttribute", "(Ljava/lang/String;Ljava/lang/Object;I)V", false);
mv.visitLabel(l30);
mv.visitLineNumber(117, l30);
mv.visitVarInsn(ALOAD, 5);
mv.visitLdcInsn("\r\n");
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "write", "(Ljava/lang/String;)V", false);
Label l33 = new Label();
mv.visitLabel(l33);
mv.visitLineNumber(118, l33);
mv.visitVarInsn(ALOAD, 5);
mv.visitLdcInsn("\u0009</body>\r\n");
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "write", "(Ljava/lang/String;)V", false);
Label l34 = new Label();
mv.visitLabel(l34);
mv.visitLineNumber(119, l34);
mv.visitVarInsn(ALOAD, 5);
mv.visitLdcInsn("</html>\r\n");
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "write", "(Ljava/lang/String;)V", false);
mv.visitLabel(l1);
mv.visitLineNumber(120, l1);
Label l35 = new Label();
mv.visitJumpInsn(GOTO, l35);
mv.visitLabel(l2);
mv.visitVarInsn(ASTORE, 8);
Label l36 = new Label();
mv.visitLabel(l36);
mv.visitLineNumber(121, l36);
mv.visitVarInsn(ALOAD, 8);
mv.visitTypeInsn(INSTANCEOF, "javax/servlet/jsp/SkipPageException");
mv.visitJumpInsn(IFNE, l6);
Label l37 = new Label();
mv.visitLabel(l37);
mv.visitLineNumber(122, l37);
mv.visitVarInsn(ALOAD, 6);
mv.visitVarInsn(ASTORE, 5);
Label l38 = new Label();
mv.visitLabel(l38);
mv.visitLineNumber(123, l38);
mv.visitVarInsn(ALOAD, 5);
Label l39 = new Label();
mv.visitJumpInsn(IFNULL, l39);
mv.visitVarInsn(ALOAD, 5);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "getBufferSize", "()I", false);
mv.visitJumpInsn(IFEQ, l39);
mv.visitLabel(l3);
mv.visitLineNumber(125, l3);
mv.visitVarInsn(ALOAD, 2);
mv.visitMethodInsn(INVOKEINTERFACE, "javax/servlet/http/HttpServletResponse", "isCommitted", "()Z", true);
Label l40 = new Label();
mv.visitJumpInsn(IFEQ, l40);
Label l41 = new Label();
mv.visitLabel(l41);
mv.visitLineNumber(126, l41);
mv.visitVarInsn(ALOAD, 5);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "flush", "()V", false);
Label l42 = new Label();
mv.visitLabel(l42);
mv.visitLineNumber(127, l42);
mv.visitJumpInsn(GOTO, l39);
mv.visitLabel(l40);
mv.visitLineNumber(128, l40);
mv.visitVarInsn(ALOAD, 5);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspWriter", "clearBuffer", "()V", false);
mv.visitLabel(l4);
mv.visitLineNumber(130, l4);
mv.visitJumpInsn(GOTO, l39);
mv.visitLabel(l5);
mv.visitInsn(POP);
mv.visitLabel(l39);
mv.visitLineNumber(131, l39);
mv.visitVarInsn(ALOAD, 7);
Label l43 = new Label();
mv.visitJumpInsn(IFNULL, l43);
mv.visitVarInsn(ALOAD, 7);
mv.visitVarInsn(ALOAD, 8);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/PageContext", "handlePageException", "(Ljava/lang/Throwable;)V", false);
mv.visitJumpInsn(GOTO, l6);
mv.visitLabel(l43);
mv.visitLineNumber(132, l43);
mv.visitTypeInsn(NEW, "javax/servlet/ServletException");
mv.visitInsn(DUP);
mv.visitVarInsn(ALOAD, 8);
mv.visitMethodInsn(INVOKESPECIAL, "javax/servlet/ServletException", "<init>", "(Ljava/lang/Throwable;)V", false);
mv.visitInsn(ATHROW);
mv.visitLabel(l6);
mv.visitLineNumber(135, l6);
mv.visitFieldInsn(GETSTATIC, "org/apache/jsp/jsp/dates/date_jsp", "_jspxFactory", "Ljavax/servlet/jsp/JspFactory;");
mv.visitVarInsn(ALOAD, 7);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspFactory", "releasePageContext", "(Ljavax/servlet/jsp/PageContext;)V", false);
Label l44 = new Label();
mv.visitJumpInsn(GOTO, l44);
mv.visitLabel(l7);
mv.visitLineNumber(134, l7);
mv.visitVarInsn(ASTORE, 9);
Label l45 = new Label();
mv.visitLabel(l45);
mv.visitLineNumber(135, l45);
mv.visitFieldInsn(GETSTATIC, "org/apache/jsp/jsp/dates/date_jsp", "_jspxFactory", "Ljavax/servlet/jsp/JspFactory;");
mv.visitVarInsn(ALOAD, 7);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspFactory", "releasePageContext", "(Ljavax/servlet/jsp/PageContext;)V", false);
Label l46 = new Label();
mv.visitLabel(l46);
mv.visitLineNumber(136, l46);
mv.visitVarInsn(ALOAD, 9);
mv.visitInsn(ATHROW);
mv.visitLabel(l35);
mv.visitLineNumber(135, l35);
mv.visitFieldInsn(GETSTATIC, "org/apache/jsp/jsp/dates/date_jsp", "_jspxFactory", "Ljavax/servlet/jsp/JspFactory;");
mv.visitVarInsn(ALOAD, 7);
mv.visitMethodInsn(INVOKEVIRTUAL, "javax/servlet/jsp/JspFactory", "releasePageContext", "(Ljavax/servlet/jsp/PageContext;)V", false);
mv.visitLabel(l44);
mv.visitLineNumber(137, l44);
mv.visitInsn(RETURN);
Label l47 = new Label();
mv.visitLabel(l47);
mv.visitLocalVariable("this", "Lorg/apache/jsp/jsp/dates/date_jsp;", null, l8, l47, 0);
mv.visitLocalVariable("request", "Ljavax/servlet/http/HttpServletRequest;", null, l8, l47, 1);
mv.visitLocalVariable("response", "Ljavax/servlet/http/HttpServletResponse;", null, l8, l47, 2);
mv.visitLocalVariable("_jspx_method", "Ljava/lang/String;", null, l9, l47, 3);
mv.visitLocalVariable("pageContext", "Ljavax/servlet/jsp/PageContext;", null, l18, l1, 4);
mv.visitLocalVariable("out", "Ljavax/servlet/jsp/JspWriter;", null, l13, l47, 5);
mv.visitLocalVariable("_jspx_out", "Ljavax/servlet/jsp/JspWriter;", null, l14, l47, 6);
mv.visitLocalVariable("_jspx_page_context", "Ljavax/servlet/jsp/PageContext;", null, l0, l47, 7);
mv.visitLocalVariable("clock", "Ldates/JspCalendar;", null, l28, l1, 8);
mv.visitLocalVariable("t", "Ljava/lang/Throwable;", null, l36, l6, 8);
mv.visitMaxs(0, 10);
mv.visitEnd();
}



import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassWriter;

public class ByteCodeWriter extends ClassWriter
{
  static final String OBJECT_REPRESENTATION = "java/lang/Object";
  ClassLoader classLoader;

  public ByteCodeWriter(ClassReader classReader, ClassLoader loader, int writerFlag)
  {
    super(classReader, writerFlag);
    this.classLoader = loader;
  }

  protected String getCommonSuperClass(String className1, String className2)
  {
    Class class1;
    Class class2;
    try
    {
      class1 = Class.forName(className1.replace('/', '.'), false, this.classLoader);
      class2 = Class.forName(className2.replace('/', '.'), false, this.classLoader);
    }
    catch (Exception th) {
      throw new RuntimeException(th.getMessage());
    }

    if (class1.isAssignableFrom(class2)) {
      return className1;
    }
    if (class2.isAssignableFrom(class1)) {
      return className2;
    }

    if ((class1.isInterface()) || (class2.isInterface())) {
      return "java/lang/Object";
    }

    do {
      class1 = class1.getSuperclass();
    }
    while (!(class1.isAssignableFrom(class2)));
    return class1.getName().replace('.', '/');
  }
}`