Exemple #1
1
  private String parseInst(Instruction inst, int offset, Map<Integer, Integer> labels)
      throws ConstantPoolException {
    StringBuffer tmp = new StringBuffer();
    StringBuilder tmp2 = new StringBuilder();

    ParseVisitor parseVisitor = new ParseVisitorM6(labels, tmp2);
    //        System.out.println(inst.toString());

    tmp.append("(" + offset + " (");
    if (labels.containsKey(inst.getPC())) {
      String label = "TAG_" + labels.get(inst.getPC());
      tagTable.put(label, new Integer(offset));
      tmp2.append(";;at " + label);
    }
    tmp.append(inst.accept(parseVisitor, null)).append("))");
    // round the line length to multiple of 8.
    if (!tmp2.equals("")) {
      int pos = 20;
      while (pos <= tmp.length()) {
        pos += 20;
      }
      int bc = pos - tmp.length();
      for (int j = 0; j < bc; j++) {
        tmp.append(" ");
      }
      tmp.append(tmp2);
    }
    return tmp.toString().trim();
  }
Exemple #2
0
  /**
   * This method processes the MethodInfo given in the constructor. It is necessary to call this
   * method before querying this method.
   *
   * @param constant_pool The constant pool element from the M6Class object representing the outer
   *     class from which this method is taken from.
   */
  public void processMethod() throws ConstantPoolException, DescriptorException {
    /* The name of the method */
    if (debug) {
      System.out.println("\nProcessing method: " + name + "Parameters: " + params);
    }
    /* Process the code attribute */
    if (cai != null && !no_method_body) {
      LinkedHashMap<Integer, Integer> labels = new LinkedHashMap<>();
      LabelsVisitor labelsVisitor = new LabelsVisitor();
      for (Instruction inst : cai.getInstructions()) {
        for (int offset : inst.accept(labelsVisitor, null)) {
          int label = inst.getPC() + offset;
          if (!labels.containsKey(label)) {
            labels.put(label, labels.size());
          }
        }
      }
      for (Code_attribute.Exception_data e : cai.exception_table) {
        if (!labels.containsKey(e.start_pc)) {
          labels.put(e.start_pc, labels.size());
        }
        if (!labels.containsKey(e.end_pc)) {
          labels.put(e.end_pc, labels.size());
        }
        if (!labels.containsKey(e.handler_pc)) {
          labels.put(e.handler_pc, labels.size());
        }
      }

      int offset = 0;
      int li = 0; // index in linenumber table
      // get the parsed code part
      for (Instruction instr : cai.getInstructions()) {
        if (lnt != null
            && li < lnt.line_number_table.length
            && lnt.line_number_table[li].start_pc == instr.getPC()) {
          m6instructions.add("; " + "line_number #" + lnt.line_number_table[li].line_number);
          li++;
        }
        String resultStr = parseInst(instr, offset, labels);
        if (resultStr != null) {
          m6instructions.add(resultStr);
          offset = offset + instr.length();
        }
      }

      // resolve any tag to absolute offsets.
      resolveTagInCode();

      // add an end marker to the code.
      m6instructions.add("(endofcode " + code_length + ")");
    }
    processed = true;
  }
Exemple #3
0
 @Override
 public String visitBranch(Instruction instr, int offset, Void p) {
   StringBuilder sb = new StringBuilder();
   return sb.append(instr.getMnemonic())
       .append(' ')
       .append(label(instr.getPC(), offset))
       .toString();
 }
Exemple #4
0
 @Override
 public String visitTableSwitch(
     Instruction instr, int default_, int low, int high, int[] offsets, Void p) {
   StringBuilder sb = new StringBuilder();
   sb.append(instr.getMnemonic()) // the opcode
       .append(" (tableswitchinfo ")
       .append(label(instr.getPC(), default_)) // the default target
       .append(" (")
       .append(low)
       .append(" . ")
       .append(high)
       .append(") (");
   for (int i = 0; i < high - low + 1; i++) {
     sb.append(label(instr.getPC(), offsets[i])).append(' ');
   }
   sb.setCharAt(sb.length() - 1, ')');
   return sb.append(")").toString();
 }
Exemple #5
0
 @Override
 public String visitLookupSwitch(
     Instruction instr, int default_, int npairs, int[] matches, int[] offsets, Void p) {
   StringBuilder sb = new StringBuilder();
   sb.append(instr.getMnemonic()) // the opcode
       .append(" (lookupswitchinfo ")
       .append(label(instr.getPC(), default_)) // the default target
       .append(' ')
       .append(npairs) // the pair count
       .append(" (");
   for (int i = 0; i < npairs; i++) {
     sb.append('(')
         .append(matches[i])
         .append(" . ")
         .append(label(instr.getPC(), offsets[i]))
         .append(") ");
   }
   sb.setCharAt(sb.length() - 1, ')');
   return sb.append(")").toString();
 }