Parser combinators are a well-known mechanism used for the compositional construction of parsers, and have shown to be particularly useful in writing parsers for rich grammars with data-dependencies and global state. Verifying applications written using them, however, has proven to be challenging in large part because of the inherently effectful nature of the parsers being composed and the difficulty in reasoning about the arbitrarily rich data-dependent semantic actions that can be associated with parsing actions. In this paper, we address these challenges by defining a parser combinator framework called Morpheus equipped with abstractions for defining composable effects tailored for parsing and semantic actions, and a rich specification language used to define safety properties over the constituent parsers comprising a program. Even though its abstractions yield many of the same expressivity benefits as other parser combinator systems, Morpheus is carefully engineered to yield a substantially more tractable automated verification pathway. We demonstrate its utility in verifying a number of realistic, challenging parsing applications, including several cases that involve non-trivial data-dependent relations.

Fri 21 Jul

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10:30 - 12:00
ECOOP 7: Verification and TestingResearch Papers at Amazon Auditorium (Gates G20)
Chair(s): Wenxi Wang University of Texas at Austin
10:30
15m
Talk
On using VeriFast, VerCors, Plural, and KeY to check object usage
Research Papers
João Mota NOVA School of Science and Technology, António Ravara NOVA LINCS & FCT, NOVA University of Lisbon, Marco Giunti NOVA-LINCS, FCT NOVA / Universidade Nova de Lisboa
DOI
10:45
15m
Talk
Exact Separation Logic
Research Papers
Petar Maksimović Imperial College London, UK, Caroline Cronjäger Ruhr-Universität Bochum, Andreas Lööw Imperial College London, Julian Sutherland Imperial College London, Philippa Gardner Imperial College London
DOI Pre-print
11:00
15m
Talk
Morpheus: Automated Safety Verification of Data-dependent Parser Combinator Programs
Research Papers
Ashish Mishra Purdue University, Suresh Jagannathan Purdue University
DOI
11:15
15m
Talk
Constraint Based Compiler Optimization for Energy Harvesting Applications
Research Papers
Yannan Li University of Southern California, Chao Wang University of Southern California
DOI
11:30
15m
Talk
Dynamic Determinacy Race Detection for Task-Parallel Programs with Promises
Research Papers
Feiyang Jin Georgia Institute of Technology, Lechen Yu Georgia Institute of Technology, Tiago Cogumbreiro University of Massachusetts Boston, Vivek Sarkar Georgia Institute of Technology, Jun Shirako Georgia Institute of Technology
DOI
11:45
15m
Talk
On Leveraging Tests to Infer Nullable Annotations
Research Papers
Jens Dietrich Victoria University of Wellington, David J. Pearce ConsenSys, Mahin Chandramohan Oracle Labs
DOI