In September 2021, Victor Stinner wrote “Debugging Python C extensions with GDB” (https://developers.redhat.com/articles/2021/09/08/debugging-python-c-extensions-gdb#getting_started_with_python_3_9). 

My question is:  with Python 3.9+, can I debug into a C extension written in pure C and called from ctypes  -- that is not written using the C_API? 

Thanks. 

Jen

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On 14 Nov 2022, at 19:10, Jen Kris via Python-list <python-list@python.org> wrote:

In September 2021, Victor Stinner wrote “Debugging Python C extensions with GDB” (https://developers.redhat.com/articles/2021/09/08/debugging-python-c-extensions-gdb#getting_started_with_python_3_9).

My question is: with Python 3.9+, can I debug into a C extension written in pure C and called from ctypes -- that is not written using the C_API?

Yes.

Just put a breakpoint on the function in the c library that you want to debug. You can set the breakpoint before a .so is loaded.

Barry

Thanks.

Jen

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Thanks for your reply.  Victor's article didn't mention ctypes extensions, so I wanted to post a question before I build from source. 


Nov 14, 2022, 14:32 by barry@barrys-emacs.org:

On 14 Nov 2022, at 19:10, Jen Kris via Python-list <python-list@python.org> wrote:

In September 2021, Victor Stinner wrote “Debugging Python C extensions with GDB” (https://developers.redhat.com/articles/2021/09/08/debugging-python-c-extensions-gdb#getting_started_with_python_3_9).

My question is: with Python 3.9+, can I debug into a C extension written in pure C and called from ctypes -- that is not written using the C_API?

Yes.

Just put a breakpoint on the function in the c library that you want to debug.
You can set the breakpoint before a .so is loaded.

Barry

Thanks.

Jen



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On 14 Nov 2022, at 23:44, Jen Kris <jenkris@tutanota.com> wrote:


Thanks for your reply. Victor's article didn't mention ctypes extensions, so I wanted to post a question before I build from source.

Gdb works on any program its not special to python.
Victor is only talking about a specific use of gdb for python c extensions.

Barry

Nov 14, 2022, 14:32 by barry@barrys-emacs.org:

On 14 Nov 2022, at 19:10, Jen Kris via Python-list <python-list@python.org> wrote:

In September 2021, Victor Stinner wrote “Debugging Python C extensions with GDB” (https://developers.redhat.com/articles/2021/09/08/debugging-python-c-extensions-gdb#getting_started_with_python_3_9).

My question is: with Python 3.9+, can I debug into a C extension written in pure C and called from ctypes -- that is not written using the C_API?

Yes.

Just put a breakpoint on the function in the c library that you want to debug.
You can set the breakpoint before a .so is loaded.

Barry

Thanks.

Jen

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https://mail.python.org/mailman/listinfo/python-list

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