Development of multithreaded server applications is particularly tricky because of their nondeterministic execution behavior, availability requirements, and extended running times. New tools are needed to help programmers understand server behavior. DejaVu supports deterministic replay of nondeterministic, multithreaded Java programs running on the Jalapeno virtual machine on uniprocessors. Jalapeno is written in Java, and its optimizing compiler combines application,
virtual machine, and DejaVu instrumentation code into unified machine-code sequences. Such integration boosts performance, but it also compounds the difficulty of replaying nondeterministic behavior accurately and with minimal interference from the instrumentation. DejaVu ensures deterministic replay through symmetric instrumentation side-effect-preserving instrumentation in both record and replay modest and remote reflection, which exposes the state of an application without perturbing it.
By: Bowen Alpern, Jong-Deok Choi, Ton Ngo, Manu Sridharan, John Vlissides, Hyun-Gyoo Yook
Published in: RC22133 in 2001
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