NDLI: Identifying procedural structure in Cobol programs

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Volume 24, Issue 6, Nov. 1999

Volume 24, Issue 5, Sept. 1999

Identifying procedural structure in Cobol programs

Efficient coverage testing using global dominator graphs

Efficient and precise modeling of exceptions for the analysis of Java programs

Safety analysis of Hawk In Flight monitor

Equivalence analysis

Inter-class def-use analysis with partial class representations

Using partial order techniques to improve performance of data flow analysis based verification

Physical type checking for C

New type signatures for legacy Fortran subroutines

Query by outlines

Benefits of a data flow-aware programming environment

Volume 24, Issue 4, July 1999

Volume 24, Issue 3, May 1999

Volume 24, Issue 2, March 1999

Volume 24, Issue 1, Jan. 1999

Identifying procedural structure in Cobol programs

Content Provider	ACM Digital Library
Author	Ramalingam, G. Field, John
Abstract	The principal control-flow abstraction mechanism in the Cobol language is the perform statement. Normally, perform statements are used in a straightforward manner to define parameterless procedures (where global variables are used to pass data into and out of procedure bodies). However, unlike most procedural constructs, distinct performed procedures can share code in arbitrarily complicated ways. In addition, performs can also be used in such a way as to cause transfers of control that do not correspond to normal call/return semantics.In this paper, we show how a Cobol program can be efficiently transformed into a semantically-equivalent procedurally well-structured representation, in which conventional procedures (i.e., with the usual call and return semantics and without code sharing) and procedure call statements replace performed code and perform statements. This transformation process properly accounts for the non-procedural control flow that can result from ill-behaved perform statements.The program representation derived from our analysis can be used directly in program understanding applications, program restructuring tools, and inter-language translators. In addition, it can be used as the starting point for a variety of context-sensitive program analyses, e.g., program slicing.
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF
ISSN	01635948
DOI	10.1145/381788.316163
Journal	ACM SIGSOFT Software Engineering Notes (SOEN)
Volume Number	24
Issue Number	5
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1979-04-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article

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