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gh-131586: Avoid refcount contention in context managers (gh-131851)

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This avoid reference count contention in the free threading build
when calling special methods like `__enter__` and `__exit__`.
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Sam Gross 2025-04-21 15:54:25 -04:00 • committed by GitHub
parent 8dfa840773
commit da53660f35
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11 changed files with 247 additions and 207 deletions
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Python/optimizer_bytecodes.c
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@ -897,9 +897,14 @@ dummy_func(void) {
}
}
op(_LOAD_SPECIAL, (owner -- attr, self_or_null)) {
attr = sym_new_not_null(ctx);
self_or_null = sym_new_unknown(ctx);
op(_INSERT_NULL, (self -- method_and_self[2])) {
method_and_self[0] = sym_new_null(ctx);
method_and_self[1] = self;
}
op(_LOAD_SPECIAL, (method_and_self[2] -- method_and_self[2])) {
method_and_self[0] = sym_new_not_null(ctx);
method_and_self[1] = sym_new_unknown(ctx);
}
op(_JUMP_TO_TOP, (--)) {