Organized Sharing (OSHA)

See Support for Explicit Runtime Concurrency Errors.

Easy communication between threads via shared memory is both a blessing and a curse. It is a blessing because it is very easy to move data and a curse because it is very easy to make mistakes. This project investigates a new way to describe the communication pattern of shared-memory concurrent programs. This investigation includes defining precise semantics for the meaning of inter-thread communication, designing a specification language to describe legal inter-thread communication patterns in a program, implementing tools to check that a program obeys its specification, and carefully evaluating the flexibility and usefulness of the specifications in practice. The initial focus is on dynamic program analysis and its software-engineering benefits, but the proposed work crosses several areas, including static analysis, programming-language design, compiler optimization, and interactions with multicore hardware. This project will provide new insight into the structure of concurrent programs and how novel tools, analyses, and languages can assist programmers. The fundamental research question is how can we build and take advantage of a programming model that describes the communication structure of shared-memory programs in terms of the program structure.

Current contacts: Benjamin Wood, Adrian Sampson, Luis Ceze, and Dan Grossman.


Composable Specifications for Structured Shared-Memory Communication (OOPSLA 2010). Benjamin P. Wood, Adrian Sampson, Luis Ceze, Dan Grossman.

Code-Centric Communication Graphs for Shared-Memory Multithreaded Programs. Benjamin P. Wood, Joseph Devietti, Luis Ceze, Dan Grossman. Technical Report UW-CSE-09-05-02, University of Washington, 2009.


Get OshaJava, the specification language and dynamic checker for Java described in our OOPSLA 2010 paper.