[issue43559] ctypes: Heap Pointer is damaged between C and Python

[Canberk Sönmez]

New submission from Canberk Sönmez <canberk.sonmez.409 at gmail.com>:

Please see the SO post:

https://stackoverflow.com/questions/66713071/ctypes-heap-pointer-is-damaged-between-c-and-python-linux-x86-64

In summary, when I return a pointer to a heap-allocated memory location from a C function, its most significant 32 bits are chopped off for some reason.

I observed this behavior in Python 3.7 and Python 3.8, on Ubuntu 18.04 and Centos 7 (x86_64).

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messages: 389107
nosy: canberk.sonmez.409
priority: normal
severity: normal
status: open
title: ctypes: Heap Pointer is damaged between C and Python

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<https://bugs.python.org/issue43559>
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