IBP-Litp
1996/Th/04:
THÈSE de DOCTORAT de l'UNIVERSITÉ PARIS 6 Litp /
Litp research reports
216 pages - Mai/May 1996 -
French document.
PostScript : Ko /Kb
Titre / Title: Evaluation partielle symbolique : une analyse sémantique des programmes C en vue de leur vérification.
Abstract : We introduce in this work a static semantical technique for C programs, built from partial evaluation and symbolic evaluation. The former consists in reducing a given program by fixing the value of a subset of its parametres, thus obtaining a residual program which semantics is equivalent to the original's for these values; the latter consists in evaluating the program by propagating into its code some symbols given arbitrarily as a value to its parametres.
The Symbolic Partial Evaluation (SPE) proposed in this work is a synthesis of these two methods. Its goal is not only to verify statically the semantics of a given C program, by statically detecting some "run-time" errors like in symbolic evaluation, but also to compute a residual program which semantics is an abstraction of the original's (and not an equivalent one like in partial evaluation).
This method presents the "off-line" aspect of a partial evaluation, and the "flow sensitive" aspect of symbolic evaluation. Thus, the interest of the residual program is twofold: first, its representation gets rid of everything that does not contribute directly to its semantics; second, each possible execution path is distinguished from each other. Thus, this provides an interesting aspect for various operations, e.g. further analyses or test series, a great part of the work being already done.
Publications internes Litp 1996 / Litp research reports 1996