Hi Pablo,
On 19/01/2021 6:46 pm, Pablo Galindo Salgado wrote:
Hi Mark,
Thanks for gathering this proposal! Looks very interesting. I have some
preliminary questions: how is this going to affect
the "py-bt" command of the gdb helpers
(https://github.com/python/cpython/blob/master/Tools/gdb/libpython.py#L1876-L1897)
and other similar tools that produce a unified Python-C backtrace? There are
several debuggers that
rely on the fact that they can merge the C stack and the Python stack by substituting
every call to "_PyEval_EvalFrameDefault"
and friends for the respective Python frame obtained separately or by
inspecting the frame object in the stack (like gdb does).
I don't see any problem fixing up the gdb helpers. The code will need to
be aware that C frames will be one-to-many to Python frames, but there's
nothing tricky there.
Is this change going to affect these tools or they will continue working as
before? In case this change will affect this tools,
is there any workaround to produce the unified C/Python call stack given the
Python stack and the C stack?
It depends on what you mean by "similar tools".
For in-process tools, then the API will continue to work.
For out-of-process debuggers, then the author's are on their own.
But that's always been the case.
The source code is public, and it won't be any more opaque than it is at
the moment :)
Cheers,
Mark.
Kind regards,
Pablo Galindo Salgado
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