PURPOSE: To facilitate the discrimination of content of a stack by automatically setting the identifier of procedure to a frame area.

CONSTITUTION: The object program of procedure PROC-A of a source program 1 is prepared. At this time, at the time of executing procedure PROC-A, in order to set the identifier 321 within the frame area 32 prepared within a stack area 3, the compiler automatically sets the identification name 2151 of procedure PROC-A in a constant area and instruction setting the identifier at the time of generating the frame area in an instruction area 212. The debug efficiency of a program executed through the use of a stack system is improved by automatically setting the identifier of procedure in the frame area.