JPS6116100B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a program debugging device for a digital computer.

The development of computer programs has very low productivity, and to deal with this problem, design methods such as structured design methods and structured programming have been proposed. Generally, the process of developing a program follows the steps of design, coding, and debugging. Although improvements have been made in design and coding using the aforementioned design techniques and high-level programming languages, improvements in debugging have lagged behind.

Particularly in real-time control systems, it is necessary to check (debug) the operation in real time on the actual system, and for this purpose conventionally a device as shown in FIG. 1 has been used. In Figure 1, 1 is a computer processing unit where the program to be debugged is executed, 2 is a bus for addresses, data, control signals, etc. output from the computer processing unit, and 3 is a probe for extracting these contents. , are connected to the control section 5 through the interface 4.

The control unit 5 sequentially controls the execution state of the computer processing unit 1 according to instructions given from the input/output unit 11, and stores it in a storage unit (hereinafter referred to as a first storage unit) 6 for monitoring execution.
The recorded contents are displayed on the display section 10 according to the given conditions via the input/output section 11. At this time, the displayed execution progress is a sequential, one-dimensional representation of the machine language instructions of the computer and changes in the internal state of the computer.

The problem with digital computer programs is that when they are written in machine language, it is difficult to understand how they correspond to the intended functions, and it is difficult to confirm the correctness of their operations.

Therefore, in order to improve the efficiency of debugging a computer program, it is necessary to proceed with debugging while clarifying the comparison with the design.

The present invention has been made to improve these points, and the program debugging apparatus of the present invention will be explained in detail below with reference to the drawings.

In FIG. 2, the essential functions of 1, 2, 3, 4, 6, and 11 are the same as in FIG. 7 is a storage unit (hereinafter referred to as the second storage unit) for program codes (source code and object code).
It generally stores the results of assembling or compiling source code. 8 is a storage unit for program design drawings (hereinafter referred to as the third storage unit), which contains a hierarchical diagram (structure diagram) of the program structure.
It stores graphical screens of program design contents, such as graphics and flowcharts, along with their related structures. Reference numeral 9 denotes a storage unit (hereinafter referred to as the fourth storage unit) for storing a program design diagram/program code correspondence table necessary for tracing the relationship between the program design diagram, the program code, and the execution result in machine language. .

In FIG. 2, the execution progress of the program to be debugged executed by the computer processing section 1 is recorded in the storage section 6 of the computer processing section 1 as soon as it is completed, and the execution progress of the program to be debugged is recorded in the storage section 6 of the computer processing section 1. 5 is displayed on the display section 10. The execution results obtained at this time are the instruction code in machine language, the program counter, and the internal state of other register contents, but since the program code is stored in the second storage unit 7 in advance, by comparing it with this, The operating status can be expanded and displayed in an easy-to-read format. FIG. 3 shows an example of a program code, and by referring to this source code and object code, a display such as the right half of the display example in FIG. 5 is performed. Here, the lines connected by straight lines are
It is a two-dimensional expansion of the machine language instructions arranged in the memory of the computer processing unit 2 according to its flow structure, and to the right of each step is the computer processing unit when that step was executed. Displays changes in the internal state of 2. A blank space indicates that the step was not executed.

Furthermore, by using the program code/program design diagram correspondence table, the corresponding program design diagrams, such as the flowchart in Figure 4, can be displayed side by side as in the display example in Figure 5, greatly improving program debugging efficiency. can.

In the display example of FIG. 5, the correspondence display of the machine language execution progress and the program blueprint has been explained, but the program code can also be displayed at the same time. Furthermore, as the program design diagram, in addition to flowcharts and structural diagrams, it is also possible to use diagrams that are well suited to the functions of the target program, such as logic diagrams and functional system diagrams.

As described above, the present invention is capable of displaying the execution status of the program to be debugged two-dimensionally in correspondence with the program design drawing, making it easy to check the operation of the computer program and Debugging efficiency can be improved.

In the embodiment shown in FIG. 2, the program to be debugged is executed by the computer processing unit 1, and the state is monitored by the probe 3.
The present invention can also be applied to a case in which processing units 3, 4, and 5 are integrated into one unit and the program to be debugged is executed in a simulated manner.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a conventional computer program debugging device, FIG. 2 is a diagram showing a computer program debugging device according to the present invention, FIG. 3 is a diagram showing an example of program code, and FIG. 4 is a diagram showing an example of a program code. 5 is a diagram showing an example of a program design diagram, and FIG. 5 is a diagram showing an example of display of the program design diagram and the execution status of the program to be debugged according to the present invention. In the figure, 1 is a computer processing unit, 2 is an input/output bus, and 3 is a computer processing unit.
is a probe, 4 is an interface, 5 is a control unit,
6 is a storage unit for execution monitor, 7 is a storage unit for program code, 8 is a storage unit for program blueprints,
Reference numeral 9 denotes a storage section for a program code/program blueprint correspondence table, 10 a display section, and 11 an input/output section. In the drawings, the same or corresponding parts are designated by the same reference numerals.

Claims (1)

[Claims] 1 A computer processing unit that executes the program to be debugged, a first storage unit that stores the program execution status of the computer processing unit, and a second storage unit that stores program code including source code and object code. a storage section, a third storage section in which program design contents such as program structure diagrams and flowcharts are stored, a fourth storage section in which a correspondence table between program codes and program design diagrams is stored, and each of the above. A display unit that displays output information of the storage unit, and a control unit that controls the first to fourth storage units and the display unit, and the display unit displays the execution status of the program to be debugged as a program blueprint or program code. A program debugging device for a computer, characterized in that the program is displayed two-dimensionally on the display unit in correspondence with each other.