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Erschienen in:
2013 | OriginalPaper | Buchkapitel
Local Shape Analysis for Overlaid Data Structures
verfasst von : Cezara Drăgoi, Constantin Enea, Mihaela Sighireanu
Erschienen in: Static Analysis
Verlag: Springer Berlin Heidelberg
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We present a shape analysis for programs that manipulate overlaid data structures which share sets of objects. The abstract domain contains Separation Logic formulas that (1) combine a per-object separating conjunction with a per-field separating conjunction and (2) constrain a set of variables interpreted as sets of objects. The definition of the abstract domain operators is based on a notion of homomorphism between formulas, viewed as graphs, used recently to define optimal decision procedures for fragments of the Separation Logic. Based on a Frame Rule that supports the two versions of the separating conjunction, the analysis is able to reason in a modular manner about non-overlaid data structures and then, compose information only at a few program points, e.g., procedure returns. We have implemented this analysis in a prototype tool and applied it on several interesting case studies that manipulate overlaid and nested linked lists.