Points-to analysis in almost linear time
POPL '96 Proceedings of the 23rd ACM SIGPLAN-SIGACT symposium on Principles of programming languages
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Proceedings of the 14th ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications
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POPL '03 Proceedings of the 30th ACM SIGPLAN-SIGACT symposium on Principles of programming languages
Points-to and Side-Effect Analyses for Programs Built with Precompiled Libraries
CC '01 Proceedings of the 10th International Conference on Compiler Construction
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CC '02 Proceedings of the 11th International Conference on Compiler Construction
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CASCON '00 Proceedings of the 2000 conference of the Centre for Advanced Studies on Collaborative research
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SAS '09 Proceedings of the 16th International Symposium on Static Analysis
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CBSE'05 Proceedings of the 8th international conference on Component-Based Software Engineering
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We present a combined class-modular points-to and class-escape analysis that allows to analyze class declarations even if no information about the code that invokes the class's methods is available as is the case for e.g. shared libraries. Any standard whole-program or summary-based points-to analysis can be plugged into our framework and thus be transformed into a class-modular, class-escape and points-to analysis. The analysis framework uses the flow restrictions imposed by the access modifiers (e.g. private, public and protected in Java) to find all fields that may be modified by code that is not part of the class declaration. These fields escape the class. Unlike method-based summaries instantiated with an unknown context, our analysis framework can give detailed points-to information for non-escaping fields. In addition, the knowledge of which fields belong to the region that does not escape a class can be exploited to perform other analysis like class-modular object in-lining [6] more efficiently or enable the automatic inference of class invariants [10]. We prove the soundness of the analysis and present a set of benchmarks showing that the analysis is suitable to analyze real world code and that more than 75% of the fields from the benchmarked classes are identified as non-escaping.