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gh-127020: Make PyCode_GetCode thread-safe for free threading (#127043)

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Some fields in PyCodeObject are lazily initialized. Use atomics and
critical sections to make their initializations and accesses thread-safe.
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Sam Gross 2024-11-21 16:00:50 +00:00 • committed by GitHub
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commit 3926842117
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3 changed files with 86 additions and 28 deletions
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Fix a crash in the free threading build when :c:func:`PyCode_GetCode`,
:c:func:`PyCode_GetVarnames`, :c:func:`PyCode_GetCellvars`, or
:c:func:`PyCode_GetFreevars` were called from multiple threads at the same
time.