Abstract
EDSA (expert data flow and static analysis tool) which uses static analysis of source code to help gain an understanding of existing code, is described. This may be for the purpose of tracking down a bug or to determine in advance whether an intended change will have any undesirable side effects. In either case, the phase of the development life cycle that is most likely to benefit from a tool like EDSA is the maintenance phase. EDSA provides three kinds of facilities. It helps to browse through code, following either the control flow or data flow, rather than the order in which the code happens to be written. It displays code with unimportant source lines eluded, so that the user can get a more global view of the program. Finally, it provides search management to make it easier to examine all possibilities when browsing. The mechanism used to create and display various views of programs is described and the approach to the user interface is discussed. The state of the current implementation is described. >
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