[issue42639] Make atexit state per interpreter

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

Ok, the initial issue is now fixed. It's possible to have more than one atexit module instance, registered callbacks in one or the other module are all called as expected. I also wrote an unit test for that.

I also took the opportunity of this issue to modernize the C code base, fix a bug in test_atexit (no longer clear atexit callbacks, run tests in subprocesses), and enhance atexit._run_exitfuncs(): log all callback exceptions using sys.unraisablehook so it's possible to catch them using the hook.

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42639>
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