[issue45256] Remove the usage of the C stack in Python to Python calls

[Christian Tismer]

Christian Tismer <tismer at stackless.com> added the comment:

FYI., in Stackless Python I built a chain of frames by a double linked list. This was the replacement for the current frame/stack mix.
Debugging was still quite easy, following this frame chain.

Note that it is a rather easy step to add the capability to squirrel the whole current chain away and replace it by another one. Add some header to such a chain, and you can call it "Tasklet".

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<https://bugs.python.org/issue45256>
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