[Python-Dev] Debugging Python scripts with GDB on OSX

Alexandru Croitor alexandru.croitor@qt.io
Fri Oct 14 10:35:00 GMT 2016


Hi,

I'm aware of PTVS, but I was hoping of getting a crude version of that for macOS, which you could say that GDB provides.

Unfortunately the GDB functionality only works on Linux, which is why I sent my message in the first place, hoping that I might be missing something.

Regards,

Alex.


> On 14 Oct 2016, at 11:56, Christian Tismer <tismer@stackless.com> wrote:
> 
> Hi Alexandru,
> 
> because I know that you are multi-platform, I can recommend the
> debugger integration of PTVS very much.
> 
> I am currently using the WingWare debugger for all my projects,
> but the Python/C++ integration of PTVS is something that I didn't
> find anywhere else!
> 
> Please have a look at the following introduction.
> 
> https://www.youtube.com/watch?v=JNNAOypc6Ek
> 
> Starting with minute 22, you will find the kind of debugging that
> you are looking for.
> 
> I was pretty amazed by this, and it is probably very helpful in
> debugging Qt and PySide. Will give it a try, soon.
> 
> Cheers -- Chris
> 
> 
> On 14/10/2016 11:12, Alexandru Croitor wrote:
>> Hi,
>> 
>> pdb is fine for pure python scripts.
>> 
>> I was interested in things like getting the python back trace or local
>> variables from inside GDB, when used in conjunction with c++, so that I
>> know which parts of C++ calls python functions, and which parts of
>> python call c++ functions. You can't do that with pdb.
>> 
>> 
>>> On 13 Oct 2016, at 19:12, Christian Tismer <tismer@stackless.com
>>> <mailto:tismer@stackless.com>> wrote:
>>> 
>>> Hi Alexandru,
>>> 
>>> I stumbled over this question a little late by chance. 
>>> 
>>> There is the possibility to use GDB, but it is most likely that you
>>> want to use python's pdb module, instead. 
>>> 
>>> Only in rare cases, when debugging the interpreter itself, you use
>>> gdb. For debugging Python code, use pdb or something better. 
>>> 
>>> Sent from my Ei4Steve
>>> 
>>> On Jul 6, 2016, at 18:14, Alexandru Croitor <alexandru.croitor@qt.io
>>> <mailto:alexandru.croitor@qt.io>> wrote:
>>> 
>>>> Hello,
>>>> 
>>>> I'm interested to find out if debugging Python scripts with GDB is
>>>> supported on OSX at all?
>>>> 
>>>> I'm referring to the functionality described
>>>> on https://wiki.python.org/moin/DebuggingWithGdb and
>>>> on http://fedoraproject.org/wiki/Features/EasierPythonDebugging.
>>>> 
>>>> I've tried so far various combinations of pre-compiled GDB from the
>>>> homebrew package manager, locally-compiled GDB from homebrew, as well
>>>> as locally compiled GDB from MacPorts, together with a pre-compiled
>>>> Python 2.7, homebrew-compiled 2.7, and custom compiled Python 2.7
>>>> from the official source tarball.
>>>> 
>>>> My results so far were not successful. The legacy GDB commands to
>>>> show a python stack trace or the local variables - do not work. And
>>>> the new GDB commands (referenced on the Fedora project page) are not
>>>> present at all in any of the GDB versions.
>>>> 
>>>> I've checked the python CI build bot tests, and it seems the new GDB
>>>> commands are only successfully tested on Linux machines, and are
>>>> skipped on FreeBSD, OS X, and Solaris machines.
>>>> 
>>>> Are the new python <-> GDB commands specific to Linux?
>>>> Are there any considerations to take in regards to debug symbols for
>>>> Python / GDB on OSX?
>>>> 
>>>> Has anyone attempted what I'm trying to do?
>>>> 
>>>> I would be grateful for any advice.
>>>> 
>>>> And I apologize if my choice of the mailing lists is not the best.
>>>> 
>>>> Regards, Alex.
>>>> 
>>>> 
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> 
> 
> -- 
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