[3.14] gh-113956: Make intern_common thread-safe in free-threaded build (gh-148886) - #148927
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colesbury merged 1 commit intoApr 23, 2026
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…ed build (pythongh-148886) Avoid racing with the owning thread's refcount operations when immortalizing an interned string: if we don't own it and its refcount isn't merged, intern a copy we own instead. Use atomic stores in _Py_SetImmortalUntracked so concurrent atomic reads are race-free. (cherry picked from commit 4629c22) Co-authored-by: Sam Gross <colesbury@gmail.com>
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Avoid racing with the owning thread's refcount operations when immortalizing an interned string: if we don't own it and its refcount isn't merged, intern a copy we own instead. Use atomic stores in _Py_SetImmortalUntracked so concurrent atomic reads are race-free.
(cherry picked from commit 4629c22)