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gh-140815: Fix faulthandler for invalid/freed frame (GH-140921) faulthandler now detects if a frame or a code object is invalid or freed. Add helper functions: * _PyCode_SafeAddr2Line() * _PyFrame_SafeGetCode() * _PyFrame_SafeGetLasti() _PyMem_IsPtrFreed() now detects pointers in [-0xff, 0xff] range as freed. (cherry picked from commit a84181c31bfc45a1d6bcb1296bd298ad612c54d0) Co-authored-by: Victor Stinner <vstinner@python.org>
The Python C API ================ The C API is divided into these sections: 1. ``Include/``: Limited API 2. ``Include/cpython/``: CPython implementation details 3. ``Include/cpython/``, names with the ``PyUnstable_`` prefix: API that can change between minor releases 4. ``Include/internal/``, and any name with ``_`` prefix: The internal API Information on changing the C API is available `in the developer guide`_ .. _in the developer guide: https://devguide.python.org/c-api/