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gh-100637: Fix int and bool __sizeof__ calculation to include the 1 element ob_digit array for 0 and False (#100663)

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Fixes behaviour where int (and subtypes like bool) __sizeof__ under-reports true size as it did not take into account the size 1 `ob_digit` array for the zero int.

Co-authored-by: Mark Dickinson <dickinsm@gmail.com>
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Ionite 2023-01-03 05:11:49 +08:00 • committed by GitHub
parent 9dee973166
commit d7e7f79ca7
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3 changed files with 7 additions and 2 deletions
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Objects/longobject.c
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@ -5879,7 +5879,10 @@ int___sizeof___impl(PyObject *self)
{
Py_ssize_t res;
res = offsetof(PyLongObject, ob_digit) + Py_ABS(Py_SIZE(self))*sizeof(digit);
res = offsetof(PyLongObject, ob_digit)
/* using Py_MAX(..., 1) because we always allocate space for at least
one digit, even though the integer zero has a Py_SIZE of 0 */
+ Py_MAX(Py_ABS(Py_SIZE(self)), 1)*sizeof(digit);
return res;
}