JPH04178728A - Program structure display and output system - Google Patents

Abstract

PURPOSE:To reduce working man-hours to interpret a program by enabling the mutual reference relation of a symbol, etc., used in the program to be referred. CONSTITUTION:The program targeted to process is read in from an external memory device 4, and is stored in a program storage part 7, and one text of the program is taken out from the program storage part 7, and an instruction is analyzed by referring to the table of an instruction specification storage part 8. When it is decided that the instruction is the one other than a branch instruction as a result of analysis, an output symbol is stored in an output symbol storage part 9, and when it is decided that the instruction is the branch instruction, the analysis of a branch destination is performed. When the branch destination is outside the program targeted to process, the output symbol of an external call is stored in the output symbol storage part 9, and when the branch destination is not outside the program targeted to process, branch destination information and the output symbol are stored in the output symbol storage part 9. When processing for all texts are completed, the information in the program storage part 7 and that in the output symbol storage part 9 are edited by using a character set, and are outputted to an output device 5. Thereby, the working man-hours for the interpretation of the program can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for displaying and outputting documents and lists indicating program processing procedures.

[Conventional technology]

In the conventional method, a rectangular figure is used for normal processing of instructions.
The source text of a program is surrounded by various shapes, such as a diamond shape, and outputted to a display device such as a printer as a flowchart, PAD, etc. for the judgment process. However, due to physical limitations such as paper size, unnecessary margins are created, resulting in an increase in the amount of documents. In addition, in the conventional method, the program list (assembly list, compile list, etc.) was written as a separate document, so when understanding a program, the program list and the document were used together, and the corresponding It was necessary to carry out the work while taking the Related methods of this type include, for example, Japanese Unexamined Patent Publication Nos. 63-253472 and 63721.
No. 1068, No. 60-100226, No. 60
-176178 gazette, 60-45845 gazette, etc. are mentioned.

[Problem to be solved by the invention]

The above-mentioned prior art is a document that only supports understanding the detailed processing procedure of a program. However, in order to understand a program, in addition to the processing procedure, information on the mutual relationships between the positions where variables used in the program are defined and the positions where they are referenced is essential. Further, when understanding a program written in a language similar to machine language such as assembler, information such as object code is especially essential. Therefore, when understanding a conventional program, the list of documents and programs (
There was a problem in that the process had to be performed while manually associating the data (assemble list, compile list, etc.).

The present invention allows you to understand a program using information such as mutual reference relationships of variables used in the program and object code corresponding to the source text, and to explain processing procedures using flowcharts, PAD, etc. using just one list. The purpose is to make it possible to understand the program, and further, the purpose is to output the same amount as the program list without increasing the list size.

[Means for solving the problem] In order to achieve the above purpose, a character set for outputting processing procedures (flowcharts, PAD, etc.) is created, and by using the character set, a program list (assembly list, compilation list, etc.) is created. An output area for the processing procedure is provided on the program list, and the processing procedure is automatically edited and output to the area without reducing the information held in the list (such as a list).

In addition, in order to output a diagram representing the processing procedure in the limited area without increasing the list size, instead of displaying the program source statement by surrounding it with various figures corresponding to the instruction. , various symbols equivalent to the character symbols corresponding to the commands are automatically edited in the area at the position corresponding to the source statement and are displayed and output.

[Effect]

Each instruction of the program and the instruction type corresponding to each instruction are stored in advance in an instruction type storage section.

First, input a program from an external storage device, analyze the instructions for each statement in the program, refer to the instruction type storage unit to find the corresponding instruction type, and output the results corresponding to each statement in the program. Store in symbol storage. At this time,
In the case of a branch instruction, information on the branch destination is also analyzed and stored in the output symbol storage section. The above process is performed on the whole text of the program, and once the processing on the whole text is completed, the content stored in the output symbol storage unit is edited as a processing procedure (flowchart, PAD, etc.) in the output area of the processing procedure, and the source text etc. Place it together with the program and output it to an output device such as a printer.

In this way, the processing procedure can be output together with the program list using a symbol that corresponds to each sentence of the program.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

In FIG. 1, 1 is an input device consisting of a keyboard, etc.;
2 is a processing device, 3 is a display device such as a display, 4 is an external storage device in which a program to be processed is stored, 5 is an output device such as a printer, 6 is an internal memory, and 10 is a character set stored therein. It is an external storage device. The internal memory 6 includes a program storage section 7 that stores the program input from the external storage device W4, an instruction type storage section 8 that stores a table in which each instruction of the program and the instruction type corresponding to each instruction are arranged, and An output symbol storage section 9 is provided to store analysis results for each sentence of the program.

FIG. 2 is a diagram showing details of a table 20 in which each instruction of the program in the instruction type storage unit 8 and the type corresponding to each instruction are arranged, and the instruction column includes A instruction, B instruction, L instruction, SVC instruction, etc. Each instruction is arranged, and in the type column, processing instructions 1 branch instruction, privileged instruction, etc. of the type corresponding to each instruction are arranged.

In FIG. 1, by operation from the input device 1.

The processing device 2 reads a processing target program from the processing program external storage device 4 and stores it in the program storage section 7. Next, one sentence of the program is taken out from the program storage section 7, analyzed with reference to the instruction type storage section 8, and the instruction analysis result is stored in the output symbol storage section 9. This process is repeated for all the sentences stored in the program storage section 7, the contents of the program storage section 7 and the output symbol storage section 9 are edited using the character set of the external storage device 10, and then outputted to the output device 5. do.

Next, one embodiment of the present invention will be described using the flowchart shown in FIG.

First, a program to be processed is read from the external storage device 4 and stored in the program storage section 7 (301). Retrieving one sentence of the program from the program storage unit 7 30
2) Analyze the instruction with reference to the table in the instruction type storage unit 8 (303). As a result of the analysis of the instruction, if the instruction is other than a branch instruction, the output symbol is stored in the output symbol storage section 9.
0), in the case of a branch instruction, the branch destination is analyzed (305
). As a result of branch destination analysis, if the branch destination is outside the processing target program, the output symbol of the external call is stored in the output symbol storage unit 307), and if the branch destination is not external, it is stored in the output symbol storage unit 9. Storing branch destination information (308);
The output symbol is stored (309). 302 to 31 above
It is checked whether the processing up to 0 has been performed on the whole text of the program (311), and if the processing on the whole text has not been completed, the processing from 302 to 310 is repeated until the processing on the whole text is completed, and when the processing on the whole text is completed, The information in the program storage section 7 and the information in the output symbol storage section 9 are edited using the character set and output to the output device 5 (312).

In the above embodiment, the output device 5 such as a printer is used as an example, but it is also possible to display on the display device 3 such as a CRT display.

FIG. 4 is a diagram showing an example of output when a flowchart output area is provided in the assemble list.

In FIG. 4, location indicates a storage location of an instruction using a relative address, object information indicates a machine language instruction, statement information indicates a sequential number attached to a statement, and source information indicates a statement written in assembler language. FIG. 5 is an example showing the meaning of each symbol used in the flowchart of FIG. 4.

Although FIG. 4 is an example of output when an output area for a flowchart is provided in the assemble list, it may be an output representing a processing procedure other than a flowchart (PAD, etc.), or it may be a compile list instead of an assemble list.

〔Effect of the invention〕

According to the present invention, it is possible to understand the flow of processing of a program using one list, and to refer to the mutual reference relationships of symbols used in the program, thereby making it possible to perform tasks for understanding the program. Man-hours can be reduced and maintainability can be improved. Especially when understanding programs written in languages similar to machine language, such as assembler,
It is very effective because not only the processing procedure and source text but also information such as object code is important.

In addition, because symbols representing processing steps are output at positions corresponding to the instructions on each line of the program list (assembly list, compile list, etc.), the amount of output required is equivalent to that of the program list, which is also economically effective. .

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention, and FIG. 2 is a table for associating instructions and types in an instruction type storage unit used when analyzing instructions in an embodiment of the present invention. FIG. 3 is a flowchart showing a series of processing steps of program loading, instruction analysis, editing/output, which is an embodiment of the present invention, and FIG. 4 shows output information of an embodiment of the present invention. FIG. 5 is a diagram for explaining symbols used in an exit diagram of an embodiment of the present invention. 1... Input device, 2... Control device. 3...Display device, 4...External storage device. 5... Output device, 6... Internal memory. 7...Program storage unit, 8...Instruction type storage unit. 9...Output symbol storage section.

Claims (1)

[Claims] 1. In a system that automatically creates program processing procedures (flowcharts, PAD, etc.), an output area for processing procedures (flowcharts, PAD, etc.) is provided on the program list (assembly list, compile list, etc.),
The processing procedure corresponding to the source statement (
A program structure display output method characterized by automatically editing and outputting flowcharts, PAD, etc.