--- Tracer.add_filter(proc)
--- Tracer.add_filter { |event,file,line,id,binding| ...}
        ȥ졼Ϥ뤫ɤꤹե륿ɲä롣
        ե륿ͿʤϤ٤ƤιԤˤĤƥȥ졼󤬽Ϥ롣
        Ϳ줿³(֥åޤProc֥)֤
        ȥ졼ϽϤ롣
        ե륿ʣɲäǤΤĤǤ⵶֤ȥȥ졼νϤ
        롣
        ե륿³ϰȤ event,file,line,id,binding 5
        Ȥ(Ȥ߹ߴؿset_trace_funcǻꤹΤȤۤƱ)
        set_trace_func˴ؤƤRuby p.391򻲾ȡ

        :ե륿³Υѥ᡼
          Ruby p.391ꡣ
          :event
            ٥Ȥɽʸ
            
            ʲμब롣åtracer.rbνϤǤɽ
            :line (-) 
                Ԥ¹
            :call (>) 
                ᥽åɸƤӽФ
            :return (<) 
                ᥽åɤΥ꥿
            :class (C)
                饹ƥȤä
            :end (E)
                饹ƥȤФ
            :raise
                㳰ȯ
            :c-call
                CǵҤ줿᥽åɤƤФ줿
            :c-return
                CǵҤ줿᥽åɤreturn
          :file
            ߽Ƥե̾
          :line
            ߽Ƥֹ
          :id
            Ǹ˸ƤӽФ줿᥽åɤΥ᥽å̾(Υܥ)
            Τ褦ʥ᥽åɤʤ0ˤʤ롣
          :binding
            ߤΥƥ

