JPH0436832A - Program correction system - Google Patents

Abstract

PURPOSE:To reduce the occurrence of errors by providing a source program correction means, a correction identifier recognition means and a program conversion means in order to apply the direct correction to a source program, and producing a patch based on the corrected source program. CONSTITUTION:A source program 1 is corrected by a source program correction means 2, and a new source program 3 is produced. In such a case, the information on a correction identifier 31a and a correction No 31b are added to the head part of a corrected part 31. A correction identifier recognition means 4 recognizes the part 31 from the presence of the identifier 31a. Then the presence or absence of a correction subject of this time is identified based on a fact whether the No 31b is coincident with a designated correction No or not. Then a corrected part 5, an original part 6, and a corrected/original part relation table 7 are inputted to a program conversation means 8. The means 8 outputs a coded correction object 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a program modification method in an electronic computer system.

[Conventional technology]

One of the methods for modifying object programs executable on computer systems is to use patches. This method does not replace the entire object program, but rather writes fragments of the object program called batches to the storage area to modify or add to the program. This method is used when you do not want to stop program operation or when the modified part is This is effective when the amount is minute.

By the way, conventionally, creating such a batch required the following steps.

(1) Find the processing procedure to be corrected or added, and describe the processing procedure at the assembler level. At this time, consideration should be given to guaranteeing the values of registers used within the batch.

(2) Express the names that appear in each instruction of the created processing procedure in address format.

(3) The destination of a branch instruction is specified as a displacement from that point.

(4) Encode the instructions and complete the batch.

(Problem to be solved by the invention) Conventionally, batches were created as described above;
It had the following drawbacks.

■Since the expression of the name tag in the address format, the displacement of the jump destination, and the coding of the instructions are all done manually, errors are likely to occur, including errors in reference areas, errors in 2 branch destinations, and errors in execution instructions. etc. may occur.

■It is necessary to modify the source program to manage the modified parts, but since this modification of the source program is done at a separate stage from batch creation, there is no need to create new errors when modifying the source program. may be included.

■Double revisions may occur because the history of revisions cannot be managed in a unified manner.

■ Guaranteeing the values of registers used in a patch is complicated, and because it is done manually, there is a possibility that errors may occur.

- In the case of modifications that affect other parts, such as changing the attributes of an area, it is necessary to identify other parts to be modified, but this requires manual intervention and there is a possibility that corrections may be omitted.

The present invention was proposed in view of two points, and its purpose is to provide a program correction method that can easily create batches and minimize the occurrence of single human errors. Our goal is to provide the following.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a source program modifying means for modifying a source program and adding information of a modification identifier and a modification number to the modified portion; and a modified source. a modification identifier recognition means for analyzing a modification identifier and a modification number from a program and outputting a modified part of a source program and a modified part/original part relationship table containing information on the original part and the modified part; The apparatus includes a program conversion means for completing a modified part/original part relationship table with information and generating a modified object 1 from the modified part and the modified part/original part relationship table.

[Effect]

In the program modification method of the present invention, the source program modification means modifies the source program based on the operator's operation, adds modification identifier and modification number information to the modification location, and extracts the modification identifier from the modified source program. The recognition means analyzes the modification identifier and the modification number and outputs the modified part of the source program and a modified part/original part relationship table containing information on the original part and the modified part, and the program conversion means converts the original part. A modified part/original part relationship table is completed with the information, and a modified object is generated from the modified part and the modified part/original part relationship table.

〔Example〕

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

FIG. 1 is a block diagram showing an embodiment of the program modification method of the present invention.

In FIG. 1, this embodiment has source program modification means 2, modification identifier recognition means 4, and program conversion means 8 as functional parts.

Note that the functions of each means will be explained through the following operations.

The operation of the above embodiment will be explained below.

Now, let us consider a case where an object program (not shown) corresponding to the source program 1 has already been created, and a modified object (batch) 9 is created in order to partially modify or add to the object program.

First, an operator (not shown) modifies the source program 1 using the source program modifying means 2 to create a source program 3. At this time, the modified source program 3 includes a modification identifier 31a and a modification number 31 at the beginning of the modified portion 31 by the source program modification means 2.
Information b is attached.

Next, the operator specifies the modification number to be modified this time and provides the modified source program 3 to the modification identifier recognition means 4. The modification identifier recognition means 4 recognizes the modification portion 31 from the existence of the modification identifier 3 ], a, and further identifies the modification number 31 . It is determined whether b matches the designated modification number or not to be the current modification target. Further, the modified part 31 is analyzed and the name of the unchanged part (original part) is referred to in the modified part 31.

Information such as the label of the destination is extracted. Then, the modified identifier recognition means 4 outputs a modified part 5 corresponding to the modified part 31 and an original part 6 inherited from the source program 1 without any changes, and also outputs information obtained from the analysis of the modified part 5. The stored revised part of the information
The original partial relationship table 7 is output. Note that the modified part/original part relationship table 7 has not been completed at this stage, and does not include information such as addresses and displacements corresponding to the names, jump destination labels, etc. of the original part 6 referred to in the modified part 5. Not yet.

Next, the modified part 5, the original part 6, and the modified part/original part relationship table 7 are converted into a program conversion means 8.
is input. First, the program conversion means 8 converts the original part 6, and the modified part/original part relationship table 7 is completed from the information obtained at that time. That is, information such as the actual address, displacement, etc. corresponding to the name mark, jump destination label, etc. of the original part 6 referred to in the modified part 5 is extracted during the process of converting the original part 6, and these are used as the modified part/original part. It is stored in the relationship table 7.

Thereafter, in the program conversion means 8, the modified part 5 is converted using the information in the modified part/original part relationship table 7, and the names, labels, etc. included in the modified part 5 are expressed by at1 nos, displacement, etc. and a coded modified object 9 is output.

FIG. 2 shows another embodiment of the present invention, in which a plurality of modifications are made to the source program 3 at one time or more than once. In this case, the modification identifier recognition means 4 recognizes the specified modification number (31b to 31b).
3nb) is output as the modified part 5, and the other parts are the original part 6.
is output as Other operations are similar to the embodiment shown in FIG. 1 described above.

〔Effect of the invention〕

As explained above, in the program modification method of the present invention, the source program is directly modified and a batch is created based on the modification. The name of the area, the label of the jump destination, etc. can be used as is, and there is no need to manually perform addressing, coding, etc., which greatly reduces the occurrence of errors.

■Since patch creation and source program modification are performed at the same time, no new errors are introduced when modifying the source program.

■Since the history of revisions can be managed uniformly using revision identifiers and revision numbers, there is no possibility of double revisions occurring.

- By including information on registers used in a patch in the modified part/original part relation table, register values can be guaranteed automatically, and the occurrence of errors can be reduced.

■By including information such as area attributes in the modified part/original part relationship table, even when making modifications, other parts can be updated at the same time as patch creation without affecting other parts, such as changing the attributes of an area. It is also possible to identify errors and reduce the occurrence of omissions in corrections.

There are other effects.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the program correction method of the present invention, and FIG. 2 is a block diagram showing another embodiment. In the figure, 1...Source program 2...Source program modification means 3...
・Source program 31.3m, 3n...Modified part 31, a, 3ma, 3na...Modification identifier 3 l b
, 3mb, 3nb-Modification number 4...
・Modified identifier recognition means 5...Modified part 6...Original part 7...Modified part/original part relationship table 8...Program conversion means

Claims (2)

[Claims] (1) A source program modification means that modifies a source program and adds information of a modification identifier and modification number to the modified part; a modification identifier recognition means for outputting a modified part/original part relationship table including information on the original part and the modified part; and a modification identifier recognition means for outputting a modified part/original part relationship table with information used when converting the original part; A program modification method comprising: program conversion means for generating a modification object from a part/original part relationship table. (2) The program modification method according to claim 1, wherein the modified part/original part relationship table stores information such as a name of the original part referred to in the modified part and a label of a jump destination.