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Re: [Python-Dev] Debugging Python scripts with GDB on OSX
- From: Christian Tismer <tismer at stackless dot com>
- To: Alexandru Croitor <alexandru dot croitor at qt dot io>
- Cc: "gdb at sourceware dot org" <gdb at sourceware dot org>, "python-dev at python dot org" <python-dev at python dot org>
- Date: Fri, 14 Oct 2016 11:56:24 +0200
- Subject: Re: [Python-Dev] Debugging Python scripts with GDB on OSX
- Authentication-results: sourceware.org; auth=none
- References: <BBF024F4-DEA9-48D4-BE6E-298E2951AD4E@qt.io> <9013A651-56E5-4F73-A06F-77933A47696B@stackless.com> <30C9FE3D-40E0-4C01-952E-664DC3D9B52A@qt.io>
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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--
Christian Tismer :^) tismer@stackless.com
Software Consulting : http://www.stackless.com/
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