[3.12] gh-105699: Use a Thread-Local Variable for PKGCONTEXT (gh-105740) #105765
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…-105740) This fixes a race during import. The existing _PyRuntimeState.imports.pkgcontext is shared between interpreters, and occasionally this would cause a crash when multiple interpreters were importing extensions modules at the same time. To solve this we add a thread-local variable for the value. We also leave the existing state (and infrequent race) in place for platforms that do not support thread-local variables. (cherry picked from commit b87d288) Co-authored-by: Eric Snow <ericsnowcurrently@gmail.com>
miss-islington
requested review from
brettcannon,
encukou,
ericsnowcurrently,
ncoghlan and
warsaw
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This was referenced Jun 14, 2023
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This fixes a race during import. The existing _PyRuntimeState.imports.pkgcontext is shared between interpreters, and occasionally this would cause a crash when multiple interpreters were importing extensions modules at the same time. To solve this we add a thread-local variable for the value. We also leave the existing state (and infrequent race) in place for platforms that do not support thread-local variables.
(cherry picked from commit b87d288)
Co-authored-by: Eric Snow ericsnowcurrently@gmail.com