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Mon 19 Jun 2017 15:15 - 15:40 at Aula Master - Concurrency Analysis Chair(s): Jeff Huang

Web applications, such as collaborative editors that allow multiple clients to concurrently interact on a shared resource, are difficult to implement correctly. Existing techniques for analyzing concurrent software do not scale to such complex systems or do not consider multiple interacting clients. This paper presents Simian, the first fully automated technique for systematically analyzing multi-client web applications.

Naively exploring all possible interactions between a set of clients of such applications is practically infeasible. Simian obtains scalability for real-world applications by using a two-phase black-box approach. The application code remains unknown to the analysis and is first explored systematically using a single client to infer potential conflicts between client events triggered in a specific context. The second phase synthesizes multi-client interactions targeted at triggering misbehavior that may result from the potential conflicts, and reports an inconsistency if the clients do not converge to a consistent state.

We evaluate the analysis on three widely used systems, Google Docs, Firepad, and ownCloud Documents, where it reports a variety of inconsistencies, such as incorrect formatting and misplaced text fragments. Moreover, we find that the two-phase approach runs 10x faster compared to exhaustive exploration, making systematic analysis practically applicable.

Mon 19 Jun
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14:00 - 15:40: PLDI Research Papers - Concurrency Analysis at Aula Master
Chair(s): Jeff HuangTexas A&M University
pldi-2017-papers14:00 - 14:25
Ariel EizenbergUniversity of Pennsylvania, Yuanfeng PengUniversity of Pennsylvania, Toma PigliUniversity of Pennsylvania, William ManskyPrinceton University, Joseph DeviettiUniversity of Pennsylvania
pldi-2017-papers14:25 - 14:50
Dustin Rhodes, Cormac FlanaganUniversity of California, Santa Cruz, Stephen FreundWilliams College
pldi-2017-papers14:50 - 15:15
Dileep KiniUniversity of Illinois at Urbana-Champaign, Umang MathurUniversity of Illinois at Urbana-Champaign, Mahesh ViswanathanUniversity of Illinois at Urbana-Champaign
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pldi-2017-papers15:15 - 15:40
Marina BillesTU Darmstadt, Anders MøllerAarhus University, Michael PradelTU Darmstadt
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