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Title: Incorrect hard limit for stack protection for MacOS and TSAN · Issue #139291 · python/cpython · GitHub

Open Graph Title: Incorrect hard limit for stack protection for MacOS and TSAN · Issue #139291 · python/cpython

X Title: Incorrect hard limit for stack protection for MacOS and TSAN · Issue #139291 · python/cpython

Description: Bug description: Largely as a result of mixing the logic for determining the hardware stack limits and for setting the software stack limits, the incorrect hard limit is set for both TSAN and MacOS. MacOS is too low by _PyOS_STACK_MARGIN...

Open Graph Description: Bug description: Largely as a result of mixing the logic for determining the hardware stack limits and for setting the software stack limits, the incorrect hard limit is set for both TSAN and MacOS...

X Description: Bug description: Largely as a result of mixing the logic for determining the hardware stack limits and for setting the software stack limits, the incorrect hard limit is set for both TSAN and MacOS...

Opengraph URL: https://github.com/python/cpython/issues/139291

X: @github

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Domain: github.com

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on Sep 24, 2025https://github.com/python/cpython/issues/139291#issue-3448901878
GH-139291: Fix C stack limits by factoring out finding hardware stack limits #139294https://github.com/python/cpython/pull/139294
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