[3.14] gh-151218: Replace sys.flags in PyConfig_Set() (#151402)#151553
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PyConfig_Set() and sys.set_int_max_str_digits() now replace sys.flags (create a new object), instead of modifying sys.flags in-place. Modifying sys.flags in-place can lead to data races when multiple threads are reading or writing sys.flags in parallel. Use _Py_atomic functions to get and set max_str_digits members. Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com> (cherry picked from commit b16d23f)
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406 files changed ·
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This was referenced Jun 16, 2026
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PyConfig_Set() and sys.set_int_max_str_digits() now replace sys.flags (create a new object), instead of modifying sys.flags in-place.
Modifying sys.flags in-place can lead to data races when multiple threads are reading or writing sys.flags in parallel.
Use _Py_atomic functions to get and set max_str_digits members.
(cherry picked from commit b16d23f)
sys_set_flagwhensys.set_int_max_str_digits()is called concurrently with free-threaded build #151218