Esempio n. 1
0
  /** Instrument the specified method to replace mapped calls. */
  public void instrument_method(Method m, MethodGen mg) {

    // Loop through each instruction, making substitutions
    InstructionList il = mg.getInstructionList();
    for (InstructionHandle ih = il.getStart(); ih != null; ) {
      if (debug_instrument_inst.enabled()) {
        debug_instrument_inst.log("instrumenting instruction %s%n", ih);
        // ih.getInstruction().toString(pool.getConstantPool()));
      }
      InstructionList new_il = null;

      // Remember the next instruction to process
      InstructionHandle next_ih = ih.getNext();

      // Get the translation for this instruction (if any)
      new_il = xform_inst(mg, ih.getInstruction());
      if (debug_instrument_inst.enabled()) debug_instrument_inst.log("  new inst: %s%n", new_il);

      // If this instruction was modified, replace it with the new
      // instruction list. If this instruction was the target of any
      // jumps or line numbers , replace them with the first
      // instruction in the new list
      replace_instructions(il, ih, new_il);

      ih = next_ih;
    }
  }
Esempio n. 2
0
  /**
   * Long output format:
   *
   * <p>&lt;position in byte code&gt; &lt;name of opcode&gt; "["&lt;opcode number&gt;"]"
   * "("&lt;length of instruction&gt;")" "&lt;"&lt;target instruction&gt;"&gt;" "@"&lt;branch target
   * offset&gt;
   *
   * @param verbose long/short format switch
   * @return mnemonic for instruction
   */
  public String toString(boolean verbose) {
    String s = super.toString(verbose);
    String t = "null";

    if (verbose) {
      if (target != null) {
        if (target.getInstruction() == this) t = "<points to itself>";
        else if (target.getInstruction() == null) t = "<null instruction!!!?>";
        else t = target.getInstruction().toString(false); // Avoid circles
      }
    } else {
      if (target != null) {
        index = getTargetOffset();
        t = "" + (index + position);
      }
    }

    return s + " -> " + t;
  }