Purging Undefined Behavior & Intel Assumptions in a Legacy C++ Codebase
summary
Shows concrete fixes not fluff: uses clang sanitizers (ASan/UBSan) and thread sanitizer to find use‑after‑free, uninitialized-data and race bugs; adds clang-tidy and custom static checks in CI, plus deprecation‑as‑error for UB‑invoking APIs so new code stays clean. Describes porting to Apple Silicon for a 15M‑line product family with ~2M shared lines, a tooling‑first rollout that finds dozens of bugs before QA, and pragmatic fixes that reduce platform breaks.
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chapters (8)
- 0:00Introduction
- 7:47Undefined behavior in C++
- 18:31Legacy code and Intel assumptions
- 24:46Legacy bugs war stories
- 37:26Cultural changes for safety
- 41:18Tooling for safer code
- 51:15Apple Silicon and new architectures
- 54:04Q&A
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