trace_func

# File lib/tracer.rb, line 132
  def trace_func(event, file, line, id, binding, klass, *)
    return if file == __FILE__

    for p in @filters
      return unless p.call event, file, line, id, binding, klass
    end

    return unless Tracer::display_c_call? or 
      event != "c-call" && event != "c-return"

    Tracer::stdout_mutex.synchronize do
      if EVENT_SYMBOL[event]
        stdout.printf("<%d>", $$) if Tracer::display_process_id?
        stdout.printf("#%d:", get_thread_no) if Tracer::display_thread_id?
        if line == 0
          source = "?\n"
        else
          source = get_line(file, line)
        end
        printf("%s:%d:%s:%s: %s",
               file,
               line,
               klass || '', 
               EVENT_SYMBOL[event],
               source)
      end
    end

  end