Software

Applying Transactional Memory to Concurrency Bugs

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Executive Summary

Multithreaded programs often suffer from synchronization bugs such as atomicity violations and deadlocks. These bugs arise from complicated locking strategies and ad hoc synchronization methods to avoid the use of locks. A survey of the bug databases of major open-source applications shows that concurrency bugs often take multiple fix attempts, and that fixes often introduce yet more concurrency bugs. Transactional Memory (TM) enables programmers to declare regions of code atomic without specifying a lock and has the potential to avoid these bugs. Where most previous studies have focused on using TM to write new programs from scratch, the authors consider its utility in fixing existing programs with concurrency bugs.

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