gh-142534: Avoid TSan warnings in dictobject.c #142544
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There are places we use "relaxed" loads where C11 requires "consume" or stronger. Unfortunately, compilers don't really implement "consume" so fake it for our use in a way that avoids upsetting TSan.
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@DinoV - with this PR, I no longer get warnings for |
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Yeah, I think that makes sense. |
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I've confirmed this fixes the issues on the lazy imports branch w/ the object.c and unicodeobject.c changes in this diff backed out: https://fb.workplace.com/chat/t/6551713648259080#:~:text=https%3A//github.com/LazyImportsCabal/cpython/commit/470b9e436222ef099c86dde640ea739acf0d5456 |
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Thanks @colesbury for the PR 🌮🎉.. I'm working now to backport this PR to: 3.14. |
miss-islington
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There are places we use "relaxed" loads where C11 requires "consume" or stronger. Unfortunately, compilers don't really implement "consume" so fake it for our use in a way that avoids upsetting TSan. (cherry picked from commit 0a62f82) Co-authored-by: Sam Gross <[email protected]>
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GH-142603 is a backport of this pull request to the 3.14 branch. |
colesbury
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…-142603) There are places we use "relaxed" loads where C11 requires "consume" or stronger. Unfortunately, compilers don't really implement "consume" so fake it for our use in a way that avoids upsetting TSan. (cherry picked from commit 0a62f82) Co-authored-by: Sam Gross <[email protected]>
fatelei
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There are places we use "relaxed" loads where C11 requires "consume" or stronger. Unfortunately, compilers don't really implement "consume" so fake it for our use in a way that avoids upsetting TSan.
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There are places we use "relaxed" loads where C11 requires "consume" or stronger. Unfortunately, compilers don't really implement "consume" so fake it for our use in a way that avoids upsetting TSan.