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[3.13] gh-117657: Avoid race in PAUSE_ADAPTIVE_COUNTER in free-threaded build (GH-122190) (#122475)

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The adaptive counter doesn't do anything currently in the free-threaded
build and TSan reports a data race due to concurrent modifications to
the counter.
(cherry picked from commit 2b163aa9e7)

Co-authored-by: Sam Gross <colesbury@gmail.com>
This commit is contained in:
Miss Islington (bot) 2024-07-30 20:18:25 +02:00 • committed by GitHub
parent 1912f94f60
commit 8e96d85386
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2 changed files with 2 additions and 2 deletions
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3
Python/ceval_macros.h
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@ -314,17 +314,18 @@ GETITEM(PyObject *v, Py_ssize_t i) {
/* gh-115999 tracks progress on addressing this. */ \
static_assert(0, "The specializing interpreter is not yet thread-safe"); \
} while (0);
#define PAUSE_ADAPTIVE_COUNTER(COUNTER) ((void)COUNTER)
#else
#define ADVANCE_ADAPTIVE_COUNTER(COUNTER) \
do { \
(COUNTER) = advance_backoff_counter((COUNTER)); \
} while (0);
#endif
#define PAUSE_ADAPTIVE_COUNTER(COUNTER) \
do { \
(COUNTER) = pause_backoff_counter((COUNTER)); \
} while (0);
#endif
#define UNBOUNDLOCAL_ERROR_MSG \
"cannot access local variable '%s' where it is not associated with a value"