Symbolic Deadlock Analysis in Concurrent Libraries and Their Clients

Methods in object-oriented concurrent libraries hide internal synchronization details. However, information hiding may result in clients causing thread safety violations by invoking methods in an unsafe manner. Given such a library, we present a technique for inferring interface contracts that speci...

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Vydáno v:2009 IEEE/ACM International Conference on Automated Software Engineering s. 480 - 491
Hlavní autoři: Deshmukh, J., Emerson, E.A., Sankaranarayanan, S.
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: IEEE 01.11.2009
Témata:
Concurrent Libraries
Contracts
Deadlock Detection
Encoding
Java
Libraries
Program Analysis
Prototypes
Safety
Scalability
SMT solvers
Static Analysis
Surface-mount technology
System recovery
Yarn
ISBN:1424452597, 9781424452590
ISSN:1938-4300
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Shrnutí:Methods in object-oriented concurrent libraries hide internal synchronization details. However, information hiding may result in clients causing thread safety violations by invoking methods in an unsafe manner. Given such a library, we present a technique for inferring interface contracts that specify permissible concurrent method calls and patterns of aliasing among method arguments, such that the derived contracts guarantee deadlock free execution for the methods in the library. The contracts also help client developers by documenting required assumptions about the library methods. Alternatively, the contracts can be statically enforced in the client code to detect potential deadlocks in the client. Our technique combines static analysis with a symbolic encoding for tracking lock dependencies, allowing us to synthesize contracts using a SMT solver. Our prototype tool analyzes over a million lines of code for some widely-used Java libraries within an hour, thus demonstrating its scalability and efficiency. Furthermore, the contracts inferred by our approach have been able to pinpoint real deadlocks in clients, i.e. deadlocks that have been a part of bug-reports filed by users and developers of the client code.
ISBN:1424452597
9781424452590
ISSN:1938-4300
DOI:10.1109/ASE.2009.14