System for analyzing and displaying data in computer program

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Details

364DIG1, 36426791, 364285, G06F 1132

Patent

active

054086604

ABSTRACT:
A system for analyzing and displaying program data capable of generating effective information for assuming paths of program execution on the basis of memory dump information of a program during stalling of the program. A data part accessing part access the data part of a program in the interruption state of running the program or at termination of the program. A linguistic-analysis-part for inputting a source program, and performs analysis for the source program according to grammar of the description language of the source program. A correspondence information accessing part accesses correspondence information of variables and addresses representing a correspondence of a variable name and a variable address in a load module. An evaluation part obtains the variable addresses for variables contained in respective assignment-expressions and comparison-expressions in the source program collected by the linguistic-analysis-part, derives a value of the data part variable in the program by the data part accessing part, and evaluates respective left-hand parts and right hand parts of the expression. A judging part determines that the expression is consistent when the left-hand part and the right-hand part are equal to each other for the assignment-expression, and when the values of the left-hand part and the right-hand part satisfy a comparison condition. A source-program-editing-part outputs the edited source program. The part judged consistent by the judging part is edited in distinguished form from other parts of the source program.

REFERENCES:
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patent: 4872167 (1989-10-01), Maezawa et al.
patent: 5038348 (1991-08-01), Yoda
patent: 5146594 (1992-09-01), Iitsuka
patent: 5191646 (1993-03-01), Naito et al.
patent: 5255385 (1993-10-01), Kikuchi
patent: 5293631 (1994-03-01), Rau et al.

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