Processors

Software Verification for Weak Memory Via Program Transformation

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Executive Summary

Despite multiprocessors implementing weak memory models, verification methods often assume Sequential Consistency (SC), thus may miss bugs due to weak memory. The authors propose a sound transformation of the program to verify, enabling SC tools to perform verification w.r.t. weak memory. They present experiments for a broad variety of models (from x86/TSO to Power/ARM) and a vast range of verification tools, quantify the additional cost of the transformation and highlight the cases when they can drastically reduce it. Their benchmarks include work-queue management code from PostgreSQL.

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