[Discuss-gnuradio] Debugging polar code crashes (was: Re: polar code example)

[Marcus Müller]

Those test failures aren't great, but I think they might be bugs in the tests.

So, OK, can't remember what you need to do under Ubuntu to get the full Python debugging capability in GDB, but I wrote a (slightly dated, since the python commands have improved) tutorial on debugging crashing Python applications [1].
The idea is to simply execute your minimal crashing example using

gdb --args python2 /path/to/flowgraph.py
(gdb) run
<wait for crash>
(gdb) backtrace

and figure out why where how things crash. If you got a backtrace, and don't immediately see how to proceed (hint: print a few local variables, if possible, using gdb's "print" command), share it with the mailing list

Best regards,
Marcus

[1]https://wiki.gnuradio.org/index.php/TutorialsGDB

On 07/12/2017 05:50 PM, Alex Homero Rivadeneira Erazo wrote:

I am using ubuntu 16.04 LTS.

At the end of the make test, I have obtained some failures:

97% tests passed, 6 tests failed out of 218

Total Test time (real) = 142.49 sec

The following tests FAILED:

48 - qa_ctrlport_probes (Failed)

59 - qa_cpp_py_binding (Failed)

76 - qa_cpp_py_binding_set (Failed)

124 - qa_filterbank (Failed)

154 - qa_ofdm_txrx (Failed)

197 - qa_fading_model (Failed)

Errors while running CTest

Makefile:61: recipe for target 'test' failed

make: *** [test] Error 8

Best regards,

Alex

On Wed, Jul 12, 2017 at 11:46 AM, Marcus Müller <address@hidden> wrote:

That might still give us enough debug info. Which Linux distro are we talking about (or, is it Linux at all?)

Best regards,

Marcus

On 07/12/2017 05:30 PM, Alex Homero Rivadeneira Erazo wrote:

Hi Marcus

At this moment, I am installing the gnuradio 3.7.12git-171-get72c77bc from source, which is the same that I installed with pybombs . Unfortunately, I just already built the gnuradio with "make && make test". The gnuradio that I had with the standard installation was gnuradio 3.7.9

Thanks 

Best regards,

Alex

On Wed, Jul 12, 2017 at 11:13 AM, Marcus Müller <address@hidden> wrote:

Hi Alex,

that does indeed sound like a bug. Things shouldn't be crashing!

So, what's the distribution you're working with? Maybe I can help you a bit with the debugging. If you're, at the moment, building GNU Radio, make sure that the CMake parameters contain -DCMAKE_BUILD_TYPE=RelWithDebInfo , so that we get debugging symbols :)

Best regards,

Marcus

On 07/12/2017 05:11 PM, Alex Homero Rivadeneira Erazo wrote:

Hi Marcus 

Based on your suggestion I have deleted my Nabbles account.

Respect to my problem with the POLAR code configurator block, I checked the discussion threads, but anyone gave a solution.

Note that this problem does not happen with a gnuradio installed with the distribution's package manager (standard installation). However, the problem with this installation method is that gnuradio is not up to date and it does not have all the blocks that I need in my work. That is why I used pybombs to install gnuradio which has the blocks that I need. Now the problem is that gnuradio with pybombs does work with the POLAR code configurator block. When I drop the POLAR code configurator block on the canvas, the gnuradio program turns down.

At this moment, I am installing gnuradio from source. If you have other ideas please tell me. 

Thanks

Best regards,

Alex 

On Wed, Jul 12, 2017 at 9:43 AM, Marcus Müller <address@hidden> wrote:

Hi Alex,

I hope you do get an answer, but that mail from Jose is from the
beginning of 2016 – not extremely likely.

Anyway, have you seen the other answers that Jose got?
If not: That's Nabble's fault. I never tire to repeat:
Nabble is just a terrible, terrible web frontend to use the official GNU
Radio Mailing list.

It's not the official mailing list archive. It never was, and it never
will be. The official way to sign up for the mailing list is

https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

and there's a link to the official mailing list archive, too.

I'd recommend deleting your Nabble account, and directly signing up
under the above address with your email account. It's really easier to
use a proper email client (eg. GMail's web frontend) and simply the
mails than Nabble. Nabble breaks discussion threads, it makes answers
invisible, and it has cost us hours and hours of unnecessary work so
far. PLEASE, don't use Nabble.

Best regards,

Marcus

On 07/12/2017 01:52 PM, Alex Rivadeneira wrote:
> Dear Jose
>
> Can you tell me if you solved the problem with the POLAR code configurator
> block? because I have the same problem in the gnuradio installed with
> pybombs.
>
> Thanks
>
> Alex
>
>
>
> --
> View this message in context: http://gnuradio.4.n7.nabble.com/polar-code-example-tp58407p64520.html
> Sent from the GnuRadio mailing list archive at Nabble.com.
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio


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--

Regards, 

Alex Homero Rivadeneira E.

Cell: 438 397-8330

--

Regards, 

Alex Homero Rivadeneira E.

Cell: 438 397-8330

--

Regards, 

Alex Homero Rivadeneira E.

Cell: 438 397-8330