this post was submitted on 08 Jun 2024
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Programmer Humor

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C++ (lemmy.zip)
submitted 5 months ago by Maven@lemmy.zip to c/programmer_humor@programming.dev
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[–] uis@lemm.ee 1 points 5 months ago (1 children)

Well, threadsanitizer catches them in runtime. Not sure about GCC static analyser and other SA tools.

[–] 5C5C5C@programming.dev 3 points 5 months ago* (last edited 5 months ago) (1 children)

I use thread sanitizer and address sanitizer in my CI, and they have certainly helped in some cases, but they don't catch everything. In fact it's the cases that they miss which are by far the most subtle instances of undefined behavior of all.

They also slow down execution so severely that I can't use them when trying to recreate issues that occur in production.

[–] uis@lemm.ee 1 points 5 months ago

They caught lock inversion, that helped to fix obscure hangs, that I couldn't reproduce on my machine, but were constantly happening on machine with more cores.