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gh-102304: Fix Py_INCREF() stable ABI in debug mode (#104763)

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When Python is built in debug mode (if the Py_REF_DEBUG macro is
defined), the Py_INCREF() and Py_DECREF() function are now always
implemented as opaque functions to avoid leaking implementation
details like the "_Py_RefTotal" variable or the
_Py_DecRefTotal_DO_NOT_USE_THIS() function.

* Remove _Py_IncRefTotal_DO_NOT_USE_THIS() and
  _Py_DecRefTotal_DO_NOT_USE_THIS() from the stable ABI.
* Remove _Py_NegativeRefcount() from limited C API.
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Victor Stinner 2023-06-06 11:15:09 +02:00 • committed by GitHub
parent bae415ad02
commit 92022d8416
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Doc/whatsnew/3.13.rst
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@ -343,6 +343,15 @@ Build Changes
:file:`!configure`.
(Contributed by Christian Heimes in :gh:`89886`.)
* C extensions built with the :ref:`limited C API <limited-c-api>`
on :ref:`Python build in debug mode <debug-build>` no longer support Python
3.9 and older. In this configuration, :c:func:`Py_INCREF` and
:c:func:`Py_DECREF` are now always implemented as opaque function calls,
but the called functions were added to Python 3.10. Build C extensions
with a release build of Python or with Python 3.12 and older, to keep support
for Python 3.9 and older.
(Contributed by Victor Stinner in :gh:`102304`.)
C API Changes
=============