Dthreads is an efficient deterministic multithreading system for unmodified C/C++ applications that replaces the pthreads library. Dthreads enforces determinism in the face of data races and deadlocks. It is easy to use: just link your program with -ldthread instead of -lpthread.

Dthreads can be downloaded from its source code repo on GitHub. A technical paper describing Dthreads is here [SOSP 2012] (presentation slides):

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This paper presents Dthreads, an efficient deterministic multithreading system for unmodified C/C++ applications that replaces the pthreads library.Dthreads enforces determinism in the face of data races and deadlocks. Dthreads works by exploding multithreaded applications into multiple processes, with private, copy-on-write mappings to shared memory. It uses standard virtual memory protection to track writes, and deterministically orders updates by each thread. By separating updates from different threads, Dthreads has the additional benefit of eliminating false sharing. Experimental results show that Dthreads substantially outperforms a state-of-the-art deterministic runtime system, and for a majority of the benchmarks evaluated here, matches and occasionally exceeds the performance of pthreads.

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Tongping Liu		Charlie Curtsinger		Emery Berger