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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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Tools/c-analyzer/c_parser/preprocessor/gcc.py
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@ -219,6 +219,7 @@ def _strip_directives(line, partial=0):
line = line[m.end():]
line = re.sub(r'__extension__', '', line)
line = re.sub(r'__thread\b', '_Thread_local', line)
while (m := COMPILER_DIRECTIVE_RE.match(line)):
before, _, _, closed = m.groups()