[issue35370] Provide API to set the tracing function to be used for running threads.

[STINNER Victor]

Change by STINNER Victor <vstinner at python.org>:


----------
keywords: +patch
pull_requests: +18324
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/18975

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35370>
_______________________________________