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PLDI 2020
Mon 15 - Fri 19 June 2020
Fri 19 Jun 2020 16:20 - 16:40 at PLDI Research Papers live stream - Static Analysis Chair(s): Julian Dolby

Many program-analysis problems can be formulated as graph-reachability problems. Interleaved Dyck language reachability. Interleaved Dyck language reachability (InterDyck-reachability) is a fundamental framework to express a wide variety of program-analysis problems over edge-labeled graphs. The InterDyck language represents an intersection of multiple matched-parenthesis languages (i.e., Dyck languages). In practice, program analyses typically leverage one Dyck language to achieve context-sensitivity, and other Dyck languages to model data dependences, such as field-sensitivity and pointer references/dereferences. In the ideal case, an InterDyck-reachability framework should model multiple Dyck languages simultaneously.

Unfortunately, precise InterDyck-reachability is undecidable. Any practical solution must over-approximate the exact answer. In the literature, a lot of work has been proposed to over-approximate the InterDyck-reachability formulation. This paper offers a new perspective on improving both the precision and the scalability of InterDyck-reachability: we aim to simplify the underlying input graph $G$. Our key insight is based on the observation that if an edge is not contributing to any InterDyck-path, we can safely eliminate it from $G$. Our technique is orthogonal to the InterDyck-reachability formulation, and can serve as a pre-processing step with any over-approximating approaches for InterDyck-reachability. We have applied our graph simplification algorithm to pre-processing the graphs from a recent InterDyck-reachability-based taint analysis for Android. Our evaluation on three popular InterDyck-reachability algorithms yields promising results. In particular, our graph-simplification method improves both the scalability and precision of all three InterDyck-reachability algorithms, sometimes dramatically.

Fri 19 Jun
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16:00 - 17:00: PLDI Research Papers - Static Analysis at PLDI Research Papers live stream
Chair(s): Julian DolbyIBM Research, USA

YouTube lightning session video

pldi-2020-papers16:00 - 16:20
Auguste OlivryInria, France, Julien LangouUniversity of Colorado at Denver, USA, Louis-Noël PouchetColorado State University, USA, P. SadayappanUniversity of Utah, USA, Fabrice RastelloInria, France
pldi-2020-papers16:20 - 16:40
Yuanbo LiGeorgia Institute of Technology, USA, Qirun ZhangGeorgia Institute of Technology, USA, Thomas RepsUniversity of Wisconsin-Madison, USA
pldi-2020-papers16:40 - 17:00
Anastasios AntoniadisUniversity of Athens, Greece, Nikos FilippakisCERN, Switzerland, Paddy KrishnanOracle Labs, Australia, Raghavendra RameshConsenSys, Australia, Nicholas AllenOracle Labs, Australia, Yannis SmaragdakisUniversity of Athens, Greece