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When two parallel threads holding no locks in common access the same memory location and at least one of the threads modifies the location, a "data race" occurs, which is usually a bug. This paper describes the algorithms and strategies used by a debugging tool, called the Nondeterminator-2, which checks for data races in programs coded in the Cilk multithreaded language. Like its predecessor, the Nondeterminator, which checks for simple "determinacy" races, the Nondeterminator-2 is a debugging tool, not a verifier, since it checks for data races only in the computation generated by a serial execution of the program on a given input.
Cheng et al. (Thu,) studied this question.