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Transactional memory (TM) has been shown to be a promising programming model for multi-core systems. We developed a Software-based Transactional Memory (STM) compiler that generates efficient transactional code for transactions to run on a STM runtime without the need of transactional hardware support. Since real-world applications often invoke third party libraries available only in binary form, it is imperative for our STM compiler to support legacy binary functions and provide an efficient solution to convert those invoked inside transactions to the corresponding transactional code. Our STM compiler employs a Lightweight Dynamic Binary Translation and Optimization Module (LDBTOM) to automatically convert legacy binary functions to transactional code. In this paper, we describe our LDBTOM system, which 1) seamlessly integrates the translated code with the STM compiler generated code to run on the STM runtime, and 2) optimizes the translated code taking advantage of dynamic optimization opportunities and STM runtime information. Although the binary code is inherently harder to optimize than high-level source code, our experiment shows that it can be translated and optimized into efficient transactional code by LDBTOM.

Supporting Legacy Binary Code in a Software Transaction Compiler with Dynamic Binary Translation and Optimization