Can gdb give the whole call stack from the beginning to the termination of the target program, so I can see the flow of the algorithm. ___________________________________________________________ ÑÅ»¢Ãâ·ÑGÓÊÏ䣭ÖйúµÚÒ»¾øÎÞÀ¬»øÓʼþɧÈų¬´óÓÊÏä http://cn.mail.yahoo.com