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The author introduces PROVIDE, a source-level process visualization and debugging environment currently under development at the University of Illinois at Chicago. PROVIDE is a modern coding and debugging environment that is designed to allow the user to configure interaction at a desired level of abstraction. It emphasizes the use of interactive computer graphics for the illustration of program execution, with special attention to the requirements of program debugging. The major features of PROVIDE are presented, especially the concepts of deferred-binding program animation, which allows users to interactively change the depiction of program execution during the debugging task, and process history consistency maintenance, which guarantees a consistent (automatically updated) record of program execution in the face of changes to program instructions and run-time data values. The current PROVIDE prototype is implemented on Macintosh workstations networked to a VAX 11/780 running 4.2 BSD Unix.>
Thomas G. Moher (Wed,) studied this question.
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