A Research of Reverse Engineering Tool which generates a non-procedural specification from COBOL programs

从COBOL程序生成非过程规范的逆向工程工具的研究

基本信息

批准号：
07680434
负责人：
HARADA Minoru
金额：
$ 1.54万
依托单位：
Aoyama Gakuin University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

项目摘要

The maintenance of software becomes more serious year after year. The development/maintenance cost ratio, for example of COBOL programs, is said to be 1 : 3. Major difficulty of software maintenance arises from the fact that a programr should understand the program written by another programr. I propose a technique of reverse engineering of COBOL programs, and develop a "COBOL Reverse Engineer-CORE/M-" based on this technique.CORE/M generates the abstract specification from COBOL programs performing the file processing. CORE/M adopted the non-procedural requirement specification called EOS specification to express the result of understanding of COBOL programs. EOS specification consists of a set of equations, called equality relation, and can be automatically translateed to visual module specification by EOS.EOS specification shows the relationships among the attribute items of entities and their output and update requirements. In each equality relation, each item is modified with "." … More by the entity having it as an attribute, and suffixed with "-" by the file storing it.CORE/M does not use the name of variables to understand program meaning because of their naming depend upon programr's personal principles. CORE/M's analysis depends purely upon correspondence between the program structure and the data structure. First, CORE/M parses the COBOL program, and develops it into a block structure. Next, CORE/M decides which entities are processed under what conditions in each block. It can be thought that all the statements in a block of a well-structured program are the calculations of the same entity fulfillling the same condition. Thus, CORE/M basically modifies every item in such a statement with the same entity identifier and the same file modifier. When a specific processing typically consisting of an initialization and a summation body are found, they are correlatively translated into a more abstract function such as SUM,MAX,and 1st. Above CORE/M's analysis consists of eleven steps in total.CORE/M actually converted the sample COBOL program consisting of 234 lines, and generates its EOS specification, which bears the same meanig of that written by an ordinary EOS designer. Future problems are that CORE/M should be extended to understand more complex COBOL program and to generate higher level specification like business data model. Less

维护tware的一年。，并开发“ COBOL反向工程师核心/M-” e.core/m从执行文件处理的COBOL程序中生成抽象规范。 cobol阳离子阳离子由Atoquations组成，阳离子的阳离子可以在实体的属性项目中显示与属性的属性。。它成块结构。发现初始化和一个求和体，它们相关地转换为更抽象的功能，例如总和，分析核心/M的分析由11个stal.core/m实际转换为由234行组成的样本程序，并生成其EOS EOS EOS规范这是一个普通的EOS设计师所写的Samenig