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gh-95004: specialize access to enums and fix scaling on free-threading (#148184)

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Co-authored-by: Ken Jin <kenjin4096@gmail.com>
This commit is contained in:
Kumar Aditya 2026-04-07 21:43:50 +05:30 • committed by GitHub
parent 7e0a0be409
commit e371ce10cd
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4 changed files with 54 additions and 8 deletions
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27
Python/specialize.c
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@ -1201,22 +1201,33 @@ specialize_class_load_attr(PyObject *owner, _Py_CODEUNIT *instr,
}
}
switch (kind) {
case METHOD:
case NON_DESCRIPTOR:
#ifdef Py_GIL_DISABLED
if (!_PyObject_HasDeferredRefcount(descr)) {
SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_DESCR_NOT_DEFERRED);
case MUTABLE:
// special case for enums which has Py_TYPE(descr) == cls
// so guarding on type version is sufficient
if (Py_TYPE(descr) != cls) {
SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_MUTABLE_CLASS);
Py_XDECREF(descr);
return -1;
}
#endif
write_u32(cache->type_version, tp_version);
if (Py_TYPE(descr)->tp_descr_get || Py_TYPE(descr)->tp_descr_set) {
SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_OVERRIDING_DESCRIPTOR);
Py_XDECREF(descr);
return -1;
}
_Py_FALLTHROUGH;
case METHOD:
case NON_DESCRIPTOR:
#ifdef Py_GIL_DISABLED
maybe_enable_deferred_ref_count(descr);
#endif
write_ptr(cache->descr, descr);
if (metaclass_check) {
write_u32(cache->keys_version, meta_version);
write_u32(cache->keys_version, tp_version);
write_u32(cache->type_version, meta_version);
specialize(instr, LOAD_ATTR_CLASS_WITH_METACLASS_CHECK);
}
else {
write_u32(cache->type_version, tp_version);
specialize(instr, LOAD_ATTR_CLASS);
}
Py_XDECREF(descr);