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Parallel assertions for debugging parallel programs

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5 Author(s)
Schwartz-Narbonne, D. ; Princeton Univ., Princeton, NJ, USA ; Feng Liu ; Pondicherry, T. ; August, D.
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A parallel program must execute correctly even in the presence of unpredictable thread interleavings. This interleaving makes it hard to write correct parallel programs, and also makes it hard to find bugs in incorrect parallel programs. A range of tools have been developed to help debug parallel programs, ranging from atomicity-violation and data-race detectors to model-checkers and theorem provers. One technique that has been successful for debugging sequential programs, but less effective for parallel programs, is running the program using assertion predicates provided by the developer. These assertions allow programmers to specify and check their assumptions. In a multi-threaded program, the programmer's assumptions include both the current state, and any actions (e.g. access to shared memory) that other, parallel executing threads might take. We introduce parallel assertions which allow programmers to express these assumptions for parallel programs using simple and intuitive syntax and semantics. We present a proof-of-concept implementation, and demonstrate its value by testing a number of benchmark programs using parallel assertions.

Published in:

Formal Methods and Models for Codesign (MEMOCODE), 2011 9th IEEE/ACM International Conference on

Date of Conference:

11-13 July 2011