[SailfishDevel] Debugging external libraries

Tone Kastlunger users.giulietta at gmail.com
Mon Mar 16 11:07:39 UTC 2015


Also do you have debugging symbols for that particular library installed
(either on phone or simulator, wherever you are testing)?

Best,
tk

On Sun, Mar 15, 2015 at 7:10 PM, Andrey Kozhevnikov <coderusinbox at gmail.com>
wrote:

>  Yes i was thinking about no contacts case. As seaside is cached database
> it can not produce any calls if no contacts. Talking about debugging imho
> you need to build a static library to see what happening inside it. But i
> may be wrong.
>
> 15.03.2015 18:08, Dmitriy Purgin пишет:
>
>  Hi,
>
>  thanks for answering.
>
>  What difference does debugging on device or emulator make to debugging
> the contacts lib itself if the environment is set properly for both? The
> worst case you get is that it tells you that there are no contacts
> whatsoever. The question is not about debugging the contacts database but
> about the principles of debugging any shared library. The only reason I've
> brought the contacts lib as an example is because I'm working with it now.
>
> So in this case I'd like to trace the execution of personByPhoneNumber().
> In other words, step into seasidefiltermodel.cpp and look what's happening
> in SeasideFilteredModel::personByPhoneNumber and further
> seasidecache.cpp's SeasideCache::itemByPhoneNumber, and so on.
>
>  Cheers
>  Dmitriy
>
> 2015-03-15 18:00 GMT+06:00 Andrey Kozhevnikov <coderusinbox at gmail.com>:
>
>>  imho you need to install it to phone and debug contacts on device, not
>> emulator?
>>
>> 15.03.2015 16:47, Dmitriy Purgin пишет:
>>
>>    Hi,
>>
>>  I'm struggling the whole day with this problem. Is there a way to debug
>> a shared library not included to a project? In particular I'd like to see
>> what's happening in nemomobile-qml-plugin-contacts-qt5.
>>
>>  I have the following sample code being executed in Sailfish Emulator:
>>
>>  import org.nemomobile.contacts 1.0
>>
>> // ...
>>
>>  PeopleModel {
>>      id: people
>>  }
>>
>> // ...
>>
>>  var p = people.personByPhoneNumber('somephonenumber');
>>
>>  I'm putting a break point on people.personByPhoneNumber() call and try
>> to step in, and it doesn't work.
>>
>> Prior to trying to step into the library code I've installed both
>> nemomobile-qml-plugin-contacts-qt5-debuginfo and
>> nemomobile-qml-plugin-contacts-qt5-debugsource to i486 target using Qt
>> Creator's SailfishOS tab. After that stepping in didn't work. Then I pushed
>> the 'sync' button  a couple of times to make sure it worked but it didn't.
>>
>>  Then I've logged into the build machine and installed these packages
>> using zypper. Pushed the 'sync' button in Qt Creator but stepping in still
>> didn't work. Interesting thing is though that the packages were installed
>> as if there were no packages installed using Qt Creator.
>>
>>  I've looked into gdb output and saw that it sets substitute-path
>>
>> SailfishOS/mersdk/targets/SailfishOS-i486/usr/src for /usr/src. I didn't
>> have anything in SailfishOS/mersdk/targets/SailfishOS-i486/usr/src, in
>> fact, I didn't have the src directory at all. It seems like the packages
>> I've installed in the build machine were not synchonised with my host
>> machine. I've done it with scp transfer but stepping in still doesn't work.
>>
>>
>>  Could anyone please give me some hints on debugging external libraries
>> or guide me to any resource explaining the process?
>>
>>
>>  Thanks.
>>
>>
>>  Cheers
>>
>> Dmitriy Purgin
>>
>>
>>
>>
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