Method and apparatus using variable ranges to support symbolic d

Details Method and apparatus using variable ranges to support symbolic d Method and apparatus using variable ranges to support symbolic d

1987-11-16

1990-08-28

Zache, Raulfe B.

Boots, shoes, and leggings

371 19, 364280, 3642804, 3642805, 364267, 36426791, G06F 1100

Patent

active

049530844

ABSTRACT:
A system uses variable ranges to support symbolic debugging of optimized code. A debug symbol table is constructed which includes descriptions of each user resource in source code. Additionally, a range table is constructed. The range table contains, for each user resource which is stored in numerous locations during execution of the code, a list of ranges and a description of where the user resource may be found during each range. If the user resource is stored as a constant during a particular range, the value of the constant may be stored in the range table. The description of each user resource in the debug symbol table includes a flag which indicates whether there is a list of ranges in the range table for a particular user resource. If there is, the description of the particular user resource will include a pointer to the list of ranges for that user resource.

REFERENCES:
patent: 4462077 (1984-07-01), York
patent: 4567574 (1986-01-01), Saade
patent: 4589068 (1986-05-01), Heinen, Jr.
patent: 4667290 (1987-05-01), Goss et al.
patent: 4755997 (1988-07-01), Takahashi
patent: 4819234 (1989-04-01), Huber
Interactive Source-Level Debugging of Optimized Programs by Polle Trescott Zellweger, Xerox Corporation, CSL-84-5, May 1984, pp. 72-74.
Research Report, Design of the FDS Interactive Debugging System, by Warren and Schlaeppi, IBM Thomas J. Watson Research Center, pp. 1-16.

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