JPS5852761A - Program check system - Google Patents

Abstract

PURPOSE:To check a program easily by displaying data on the execution of every instruction of the program to be checked on a display part every time one instruction of the program is executed. CONSTITUTION:A counter 3 is driven and step-advanced by the start instruction ST of a tracer T, generating an interruption instruction B. Once this interruption instruction B is received by an interruption acceptance part 4, a control part 5 reads an execution instruction S1 out of the starting address A1 of a program P to be checked by a next instruction of the tracer T, and then executes the instruction. The control part 5 saves data of registers R0 and R, and a stack pointer SP in a memory 6. Then, a display control part 7 is actuated by a control signal E to display data D in the memory 6 on a display part 8. When the displayed data has no error, a keyboard 9 is operated to generate a start signal F by the display control part 7, thereby displaying the execution state and results of a program to be checked on the display part 8.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a program inspection method for examining and inspecting the execution state of a program.

One method for testing programs written in assembler language is to use a test program (laser). This is done by setting breakpoints in advance at the main points (steps) of the test program, setting 5VC (supervisor call) commands therein, and when executing the test poodaram, the commands of the main steps are executed. This method outputs the execution status each time it is executed and checks it. Such conventional methods have the disadvantage that when a program runaway (loop state due to program construction) occurs between major locations, the cause cannot be ascertained.

The present invention is presented to solve the above-mentioned drawbacks,
The purpose is to provide a program inspection method that facilitates program inspection.

The present invention provides a program inspection method that includes a processing device, a display section, and a display section, and checks for errors by executing the program to be inspected by the processing device. A counter that increments each time an instruction is executed, and means that issues an interrupt instruction to the control program of the processing device each time the counter is incremented, the processing device receiving the interrupt instruction After executing one instruction of the inspection program, the execution result and execution state data are stored in the memory, and the stored data is stored in the display memory and displayed. This is a programmable inspection method.

The invention will be explained below with reference to the drawings. The drawing is a block diagram for explaining an embodiment of the present invention, in which 1.6 is a memory, 2 is a fixed area, 3 is a counter, 4 is an interrupt reception section, 5 is a control section, and F is a display control section. section, 8 is the display section, 9 is the keyboard, 1 person, An is the address, B is the interrupt command, C is the control V1 code, D is the data, E is the control signal, FF
i start signal, IC is address counter, LP8W is load B8W instruction, P is program to be tested, R, Ro are registers, 8 is status information s81 + s, I
An is an execution instruction, 8F is a stack pointer, 8T is a startup instruction, and T is a trace (inspection program).

In the fixed area 2 of the memory 1 in the drawing, the start address AI of the program P to be tested is stored, and is updated (person, → person tom → . . . person n) every time one instruction is executed. shall be. Also, every time counter 3 increments, interrupt command B
is emitted. In the drawing, first, the counter 3 is activated and incremented by the activation command 8T of the tracer T, and an interrupt command B is issued. When the interrupt reception unit 4 receives this interrupt command B, the control unit 5 receives the next command (LP8W
) extracts the execution instruction S1 at the start address A1 of the p-gram P to be inspected and executes it. Next, the control section 5
is register R0 (status information S.

The data of condition code C, address counter IC), register 8 (execution results, etc.), and stack pointer SP are stored in memory 6 by 8AVB. Thereafter, the display control section 7 is activated by the control signal E, and the data D in the memory 6 is displayed on the display section 8. The inspector strives to discover errors by examining the displayed data. If there is no abnormality, when the keyboard 9 is operated, the start signal y is issued from the 1 display control section 7, which causes the tracer T to operate again and the interrupt command B to be issued by incrementing the counter 3. Then, the execution instruction S3 at the next address At of the program under test P is retrieved (by the LP8W instruction) and executed, and the execution state and execution result data are displayed on the display section 8 in the same way as described above. .

As described above, the present invention has the advantage of improving the accuracy of program inspection, since it is possible to carry out a sive bag by displaying data related to the execution on the display every time one instruction of the program to be inspected is executed. have

[Brief explanation of the drawing]

The drawings are blocks for explaining one embodiment of the present invention, and the symbols used in the drawings are as follows. 1.6 is a memory, 2 is a fixed area, 3 is a counter, 4 is an interrupt reception unit, 5 is a control unit, 7 is a display control unit, 8 is a display unit,
9 is the keyboard, person, 1. An is address, B is I
IIJ included instruction, C is a conditional code, D is data, E is a control signal, F is a start signal, IC is an address counter, LP8WFi, 4-do F8W instruction, R, R, is a register, S is status information, S Emperor, 8. ．． 8n is the execution command, SP is the stack pointer, BT startup command, and T is the tracer.

Claims (1)

[Claims] In the program inspection method, which includes a processing device, a memory, and a display unit, and which checks for errors by executing a program to be inspected by the processing device, each time a control program for the processing device is used. and means for issuing an interrupt instruction to the program, and after the processing device receives the interrupt instruction and executes one instruction of the program under test, the execution result and execution state data are stored in the memory; A program inspection method characterized in that the program inspection method is characterized in that the data obtained by the program is displayed in the display memory and then inspected.