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[3.12] gh-105699: Use a Thread-Local Variable for PKGCONTEXT (gh-105740) (gh-105765)

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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 b87d288275)

Co-authored-by: Eric Snow <ericsnowcurrently@gmail.com>
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Miss Islington (bot) 2023-06-13 18:34:26 -07:00 • committed by GitHub
parent 26bc2cc061
commit bc997b38b6
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4 changed files with 24 additions and 1 deletions
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3
Tools/c-analyzer/c_parser/parser/_regexes.py
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@ -58,6 +58,7 @@ _KEYWORD = textwrap.dedent(r'''
extern |
register |
static |
_Thread_local |
typedef |
const |
@ -137,7 +138,7 @@ COMPOUND_TYPE_KIND = r'(?: \b (?: struct | union | enum ) \b )'
#######################################
# variable declarations
_STORAGE = 'auto register static extern'.split()
_STORAGE = 'auto register static extern _Thread_local'.split()
STORAGE_CLASS = rf'(?: \b (?: {" | ".join(_STORAGE)} ) \b )'
TYPE_QUALIFIER = r'(?: \b (?: const | volatile ) \b )'
PTR_QUALIFIER = rf'(?: [*] (?: \s* {TYPE_QUALIFIER} )? )'