Examples of org.aspectj.apache.bcel.classfile.Code

Package org.aspectj.apache.bcel.classfile

Examples of org.aspectj.apache.bcel.classfile.Code

org.aspectj.apache.bcel.classfile.Code
This class represents a chunk of Java byte code contained in a method. It is instantiated by the Attribute.readAttribute() method. A Code attribute contains informations about operand stack, local variables, byte code and the exceptions handled within this method. This attribute has attributes itself, namely LineNumberTable which is used for debugging purposes and LocalVariableTable which contains information about the local variables. @version $Id: Code.java,v 1.9 2009/10/05 17:35:36 aclement Exp $ @author M. Dahm @see Attribute @see CodeException @see LineNumberTable @see LocalVariableTable

    Attribute[] attributes = m.getAttributes();
    for (int i = 0; i < attributes.length; i++) {
      Attribute a = attributes[i];


      if (a instanceof Code) {
        Code code = (Code) a;
        setMaxStack(code.getMaxStack());
        setMaxLocals(code.getMaxLocals());


        CodeException[] ces = code.getExceptionTable();


        InstructionHandle[] arrayOfInstructions = il.getInstructionsAsArray();


        // process the exception table
        // -
        if (ces != null) {
          for (CodeException ce : ces) {
            int type = ce.getCatchType();
            ObjectType catchType = null;


            if (type > 0) {
              String cen = m.getConstantPool().getConstantString_CONSTANTClass(type);
              catchType = new ObjectType(cen);
            }


            int end_pc = ce.getEndPC();
            int length = m.getCode().getCode().length;


            InstructionHandle end;


            if (length == end_pc) { // May happen, because end_pc is exclusive
              end = il.getEnd();
            } else {
              end = il.findHandle(end_pc, arrayOfInstructions);// il.findHandle(end_pc);
              end = end.getPrev(); // Make it inclusive
            }


            addExceptionHandler(il.findHandle(ce.getStartPC(), arrayOfInstructions), end, il.findHandle(ce
                .getHandlerPC(), arrayOfInstructions), catchType);
          }
        }


        Attribute[] codeAttrs = code.getAttributes();
        for (int j = 0; j < codeAttrs.length; j++) {
          a = codeAttrs[j];


          if (a instanceof LineNumberTable) {
            LineNumber[] ln = ((LineNumberTable) a).getLineNumberTable();

View Full Code Here

    }


    CodeException[] c_exc = getCodeExceptions();
    int exc_len = c_exc.length * 8; // Every entry takes 8 bytes


    Code code = null;


    if ((il != null) && !isAbstract()) {
      // Remove any stale code attribute
      List<Attribute> attributes = getAttributes();
      for (int i = 0; i < attributes.size(); i++) {
        Attribute a = attributes.get(i);
        if (a instanceof Code) {
          removeAttribute(a);
        }
      }


      code = new Code(cp.addUtf8("Code"), 8 + byte_code.length + // prologue byte code
          2 + exc_len + // exceptions
          2 + attrs_len, // attributes
          maxStack, maxLocals, byte_code, c_exc, code_attrs, cp);


      addAttribute(code);

View Full Code Here

    Attribute[] attributes = m.getAttributes();
    for (int i = 0; i < attributes.length; i++) {
      Attribute a = attributes[i];


      if (a instanceof Code) {
        Code code = (Code) a;
        setMaxStack(code.getMaxStack());
        setMaxLocals(code.getMaxLocals());


        CodeException[] ces = code.getExceptionTable();


        InstructionHandle[] arrayOfInstructions = il.getInstructionsAsArray();


        // process the exception table
        // -
        if (ces != null) {
          for (CodeException ce : ces) {
            int type = ce.getCatchType();
            ObjectType catchType = null;


            if (type > 0) {
              String cen = m.getConstantPool().getConstantString_CONSTANTClass(type);
              catchType = new ObjectType(cen);
            }


            int end_pc = ce.getEndPC();
            int length = m.getCode().getCode().length;


            InstructionHandle end;


            if (length == end_pc) { // May happen, because end_pc is exclusive
              end = il.getEnd();
            } else {
              end = il.findHandle(end_pc, arrayOfInstructions);// il.findHandle(end_pc);
              end = end.getPrev(); // Make it inclusive
            }


            addExceptionHandler(il.findHandle(ce.getStartPC(), arrayOfInstructions), end, il.findHandle(ce
                .getHandlerPC(), arrayOfInstructions), catchType);
          }
        }


        Attribute[] codeAttrs = code.getAttributes();
        for (int j = 0; j < codeAttrs.length; j++) {
          a = codeAttrs[j];


          if (a instanceof LineNumberTable) {
            LineNumber[] ln = ((LineNumberTable) a).getLineNumberTable();

View Full Code Here

    }


    CodeException[] c_exc = getCodeExceptions();
    int exc_len = c_exc.length * 8; // Every entry takes 8 bytes


    Code code = null;


    if ((il != null) && !isAbstract()) {
      // Remove any stale code attribute
      List<Attribute> attributes = getAttributes();
      for (int i = 0; i < attributes.size(); i++) {
        Attribute a = attributes.get(i);
        if (a instanceof Code) {
          removeAttribute(a);
        }
      }


      code = new Code(cp.addUtf8("Code"), 8 + byte_code.length + // prologue byte code
          2 + exc_len + // exceptions
          2 + attrs_len, // attributes
          maxStack, maxLocals, byte_code, c_exc, code_attrs, cp);


      addAttribute(code);

View Full Code Here

  file.print(",&nbsp;");
    }


    file.println(")</B></P>");
    
    Code c=null;
    byte[] code=null;


    if(attributes.length > 0) {
      file.print("<H4>Attributes</H4><UL>\n");
      for(int i=0; i < attributes.length; i++) {
  byte tag = attributes[i].getTag();


  if(tag != ATTR_UNKNOWN)
    file.print("<LI><A HREF=\"" + class_name + "_attributes.html#method" + method_number + "@" + i +
         "\" TARGET=Attributes>" + ATTRIBUTE_NAMES[tag] + "</A></LI>\n");
  else
    file.print("<LI>" + attributes[i] + "</LI>");


  if(tag == ATTR_CODE) {
    c = (Code)attributes[i];
    Attribute[] attributes2 = c.getAttributes();
    code                 = c.getCode();
          
    file.print("<UL>");
    for(int j=0; j < attributes2.length; j++) {
      tag = attributes2[j].getTag();
      file.print("<LI><A HREF=\"" + class_name + "_attributes.html#" +

View Full Code Here

          String lvtname = ((ConstantUtf8) cp.getConstant(lvt.getNameIndex())).getBytes();
          if (! lvtname.equals("LocalVariableTable")){
            throw new ClassConstraintException("The LocalVariableTable attribute '"+tostring(lvt)+"' is not correctly named 'LocalVariableTable' but '"+lvtname+"'.");
          }


          Code code = obj;


          //In JustIce, the check for correct offsets into the code array is delayed to Pass 3a.
          LocalVariable[] localvariables = lvt.getLocalVariableTable();


          for (int i=0; i<localvariables.length; i++){
            checkIndex(lvt, localvariables[i].getNameIndex(), CONST_Utf8);
            String localname = ((ConstantUtf8) cp.getConstant(localvariables[i].getNameIndex())).getBytes();
            if (!validJavaIdentifier(localname)){
              throw new ClassConstraintException("LocalVariableTable '"+tostring(lvt)+"' references a local variable by the name '"+localname+"' which is not a legal Java simple name.");
            }


            checkIndex(lvt, localvariables[i].getSignatureIndex(), CONST_Utf8);
            String localsig  = ((ConstantUtf8) (cp.getConstant(localvariables[i].getSignatureIndex()))).getBytes(); // Local signature(=descriptor)
            Type t;
            try{
              t = Type.getType(localsig);
            }
            catch (ClassFormatError cfe){ // sometimes BCEL is a little harsh describing exceptional situations.
              throw new ClassConstraintException("Illegal descriptor (==signature) '"+localsig+"' used by LocalVariable '"+tostring(localvariables[i])+"' referenced by '"+tostring(lvt)+"'.");
            }
            int localindex = localvariables[i].getIndex();
            if ( ( (t==Type.LONG || t==Type.DOUBLE)? localindex+1:localindex) >= code.getMaxLocals()){
              throw new ClassConstraintException("LocalVariableTable attribute '"+tostring(lvt)+"' references a LocalVariable '"+tostring(localvariables[i])+"' with an index that exceeds the surrounding Code attribute's max_locals value of '"+code.getMaxLocals()+"'.");
            }


            try{
              localVariablesInfos[method_number].add(localindex, localname, localvariables[i].getStartPC(), localvariables[i].getLength(), t);
            }

View Full Code Here


    /* Handle different attributes
     */
    switch(tag) {
    case ATTR_CODE:
      Code        c          = (Code)attribute;


      // Some directly printable values
      file.print("<UL><LI>Maximum stack size = " + c.getMaxStack() + 
     "</LI>\n<LI>Number of local variables = " + 
     c.getMaxLocals() + "</LI>\n<LI><A HREF=\"" + class_name +
     "_code.html#method" + method_number + "\" TARGET=Code>Byte code</A></LI></UL>\n");


      // Get handled exceptions and list them
      CodeException[] ce  = c.getExceptionTable();
      int             len = ce.length;


      if(len > 0) {
  file.print("<P><B>Exceptions handled</B><UL>");

View Full Code Here

    Attribute[] attributes = m.getAttributes();
    for(int i=0; i < attributes.length; i++) {
      Attribute a = attributes[i];


      if(a instanceof Code) {
  Code c = (Code)a;
  setMaxStack(c.getMaxStack());
  setMaxLocals(c.getMaxLocals());
  
  CodeException[] ces = c.getExceptionTable();
  
  if(ces != null) {
    for(int j=0; j < ces.length; j++) {
            CodeException ce     = ces[j];
            int           type   = ce.getCatchType();
            ObjectType    c_type = null;


      if(type > 0) {
        String cen = m.getConstantPool().getConstantString(type, Constants.CONSTANT_Class);
        c_type = new ObjectType(cen);
      }


      int end_pc = ce.getEndPC();
      int length = m.getCode().getCode().length;
      
      InstructionHandle end;


      if(length == end_pc) { // May happen, because end_pc is exclusive
        end = il.getEnd();
      } else {
        end = il.findHandle(end_pc);
        end = end.getPrev(); // Make it inclusive
      }


      addExceptionHandler(il.findHandle(ce.getStartPC()), end,
        il.findHandle(ce.getHandlerPC()), c_type);
    }
  }


  Attribute[] c_attributes = c.getAttributes();
  for(int j=0; j < c_attributes.length; j++) {
    a = c_attributes[j];


    if(a instanceof LineNumberTable) {
      LineNumber[] ln = ((LineNumberTable)a).getLineNumberTable();

View Full Code Here

      attrs_len += (code_attrs[i].getLength() + 6);


    CodeException[] c_exc   = getCodeExceptions();
    int             exc_len = c_exc.length * 8; // Every entry takes 8 bytes


    Code code = null;


    if((il != null) && !isAbstract()) {
      // Remove any stale code attribute
      Attribute[] attributes = getAttributes();
      for(int i=0; i < attributes.length; i++) {
      Attribute a = attributes[i];
      if(a instanceof Code)
        removeAttribute(a);
      }


      code = new Code(cp.addUtf8("Code"),
          8 + byte_code.length + // prologue byte code
          2 + exc_len +          // exceptions
          2 + attrs_len,         // attributes
          max_stack, max_locals,
          byte_code, c_exc,

View Full Code Here

TOP

Related Classes of org.aspectj.apache.bcel.classfile.Code

org.aspectj.apache.bcel.generic.MethodGen

org.aspectj.apache.bcel.util.AttributeHTML

org.aspectj.apache.bcel.util.CodeHTML

org.aspectj.apache.bcel.verifier.statics.Pass2Verifier$CPESSC_Visitor

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.