Bug report
Bug description:
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// Py_REFCNT() implementation for the stable ABI |
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PyAPI_FUNC(Py_ssize_t) Py_REFCNT(PyObject *ob); |
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#if defined(Py_LIMITED_API) && Py_LIMITED_API+0 >= 0x030e0000 |
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// Stable ABI implements Py_REFCNT() as a function call |
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// on limited C API version 3.14 and newer. |
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#else |
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static inline Py_ssize_t _Py_REFCNT(PyObject *ob) { |
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#if !defined(Py_GIL_DISABLED) |
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return ob->ob_refcnt; |
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#else |
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uint32_t local = _Py_atomic_load_uint32_relaxed(&ob->ob_ref_local); |
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if (local == _Py_IMMORTAL_REFCNT_LOCAL) { |
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return _Py_IMMORTAL_INITIAL_REFCNT; |
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} |
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Py_ssize_t shared = _Py_atomic_load_ssize_relaxed(&ob->ob_ref_shared); |
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return _Py_STATIC_CAST(Py_ssize_t, local) + |
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Py_ARITHMETIC_RIGHT_SHIFT(Py_ssize_t, shared, _Py_REF_SHARED_SHIFT); |
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#endif |
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} |
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#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000 |
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# define Py_REFCNT(ob) _Py_REFCNT(_PyObject_CAST(ob)) |
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#endif |
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#endif |
In Python 3.14 Py_REFCNT is moved to become a function in the stable ABI. This works fine. If you use a Py_LIMITED_API version less that 3.14 then it generates _Py_REFCNT as an inline function.
On Limited API versions less than 3.11 then it defined Py_REFCNT to be _Py_REFCNT plus a cast. However on Py_LIMITED_API versions between 3.11 and 3.14 then it doesn't work - Py_REFCNT is defined as a function but isn't in the stable ABI.
See wjakob/nanobind#1183 for this in the wild.
CPython versions tested on:
3.14
Operating systems tested on:
Linux
Linked PRs
