On Mon, Dec 31, 2018 at 10:55 AM Prakhar Goel <newt0...@gmail.com> wrote: > > I wanted to test the waters on this idea. > > The idea is to allow debugging Cython programs with PDB. This relies > on making call-backs to trigger the sys.trace functionality every now > and then. It is very similar to how profiling is handled so I figured > that a bunch of the infra for this is already present. It involves a > lot of overhead so it would only be enabled for a special debug mode > but could be very useful in that capacity since it would allow using > identical tools for both the Python and Cython modules. Additionally > other people have built debugging tools on top of sys.settrace so some > of the more advanced debugging facilities would also become at least > partially available for Cython modules. > > It would be a fair bit of work. I'm not asking you to do this work of > course! Just looking for some feedback here. The rough pieces as far > as I can tell: > > > Adding in a flag for a special debug mode that calls Python's trace > > functions appropriately. > > > code-gen for all the trace calls. > > > Ideally we want some kind of wrapped call-frame that exports the current > > set of variables. Cython knows quite a bit about the variables currently in > > scope thanks to the cdef declarations. Ideally we should export these over > > to the Python side (with appropriate wrappers perhaps for the raw-c > > structs?). This is probably the most work but I'm hoping that getting a MVP > > here wouldn't be too hard... > > Thoughts? Comments? Suggestions?
I have had the exact same idea before, and I believe it to be possible, but as you say non-trivial. But at least you're not the only one to have the idea so it can't be completely crazy :) If you can get the basics working, you might also want to look into supporting it via Python 3.7's sys.breakpointhook: https://www.python.org/dev/peps/pep-0553/ _______________________________________________ cython-devel mailing list cython-devel@python.org https://mail.python.org/mailman/listinfo/cython-devel
