[Libreoffice-qa] minutes of ESC call ...

[Markus Mohrhard]

On Mon, Sep 18, 2017 at 7:44 PM, Markus Mohrhard <
markus.mohrhard at googlemail.com> wrote:

>
>
> On Mon, Sep 18, 2017 at 6:10 PM, Michael Meeks <
> michael.meeks at collabora.com> wrote:
>
>> Hi Markus,
>>
>> On 18/09/17 16:26, Markus Mohrhard wrote:
>> >     * Crash Reporter (Xisco)
>> >         + http://crashreport.libreoffice.org/stats/?days=128
>> ...
>> > I already spent more than a day looking into that issue. It is not a
>> > problem in LibreOffice or our tooling. Merged libraries generarted with
>> > MSVC 2015 seem to store pdb info differently and DIA (the MS API that
>> > breakpad uses to access pdb info) is not able to extract any useful
>> > information. The uploaded symbol information don't contain anything
>> > useful so that breakpad is not able to generate useful backtraces for
>> > the merged library.
>>
>>         Oh - interesting. So - did I understand right from the above that
>> the
>> problem is in the client-side up-load of the stack / symbol information ?
>>
>
> Yes. The problem is already during the collection of the symbol
> information after the build as part of make symbols. [1] and [2] show two
> mergedlo.dll symbol files that show that a significant part is already
> missing. As a result there is no way to recover the stacktrace after a
> crash happens.
>
>
>>         I'm curious what Mozilla are doing here since they default to
>> VS2015 -
>> and also have some "put everything in one big DLL" approach.
>>
>
> I have not looked at that. I checked if a newer breakpad version might
> help but there was no solution. Additionally I had a test if the
> incremental linking flag that we use would be the problem but that was also
> not helping. The next step would be to debug the dump_syms executable from
> breakpad and try to understand what is going wrong.
>
> Regards,
> Markus
>

[1] http://dev-www.libreoffice.org/tmp/msvc2013_mergedlo.zip
[2] http://dev-www.libreoffice.org/tmp/msvc2015_mergedlo.zip
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