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Jonas Devlieghere · Jun 3, 2025

dsymutil's Lockstep Algorithm

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I was recently answering questions about dsymutil ’s multi-threading model and lockstep algorithm. I decided to write it down here for future reference. This article focuses on types and the .debug_info section. Background As a reminder, dsymutil is an optimizing DWARF linker. It only retains debug info for elements that appear in the final executable. It uses the One Definition Rule (ODR)…

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