NDLI: Snugglebug:a powerful approach to weakest preconditions

Content Provider	ACM Digital Library
Author	Sridharan, Manu Chandra, Satish Fink, Stephen J.
Abstract	Symbolic analysis shows promise as a foundation for bug-finding, specification inference, verification, and test generation. This paper addresses demand-driven symbolic analysis for object-oriented programs and frameworks. Many such codes comprise large, partial programs with highly dynamic behaviors--polymorphism, reflection, and so on--posing significant scalability challenges for any static analysis. We present an approach based on interprocedural backwards propagation of weakest preconditions. We present several novel techniques to improve the efficiency of such analysis. First, we present directed call graph construction, where call graph construction and symbolic analysis are interleaved. With this technique, call graph construction is guided by constraints discovered during symbolic analysis, obviating the need for exhaustively exploring a large, conservative call graph. Second, we describe generalization, a technique that greatly increases the reusability of procedure summaries computed during interprocedural analysis. Instead of tabulating how a procedure transforms a symbolic state in its entirety, our technique tabulates how the procedure transforms only the pertinent portion of the symbolic state. Additionally, we show how integrating an inexpensive, custom logic simplifier with weakest precondition computation dramatically improves performance. We have implemented the analysis in a tool called Snugglebug and evaluated it as a bug-report feasibility checker. Our results show that the algorithmic techniques were critical for successfully analyzing large Java applications.
Starting Page	363
Ending Page	374
Page Count	12
File Format	PDF
ISSN	03621340 15581160
DOI	10.1145/1543135.1542517
Journal	ACM SIGPLAN Notices (SIGP)
Volume Number	44
Issue Number	6
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1983-05-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Symbolic analysis Weakest preconditions Interprocedural analysis
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Software

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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