On 13 February 2018 at 15:11, Daniel Stone <dan...@fooishbar.org> wrote:
> Hi,
>
> On 13 February 2018 at 15:00, Pekka Paalanen <ppaala...@gmail.com> wrote:
>> On Thu, 8 Feb 2018 13:53:54 +0000
>> "Ucan, Emre (ADITG/ESB)" <eu...@de.adit-jv.com> wrote:
>>> Yes I saw a similar problem when I tested previous ivi patches.
>>> I run make clean & make & make check. Then it worked.
>>>
>>> Maybe it is releated to weston-tests-env changes from this commit:
>>> https://cgit.freedesktop.org/wayland/weston/commit/?id=0707b0e5d48fa6f1ac41ea60c2adc2e6430c7425
>>>  ?
>>
>> Daniel helped to pinpoint the cause of this failure. After the
>> ivi-shell patches, we now get hmi-controller.so loaded when before it
>> was not. Hmi-controller creates layers and surfaces, so it breaks tests
>> that expect to be in complete control over the scene.
>>
>> When the controller plugins were changed to be loaded as normal weston
>> plugins, the directive to load the test controller no longer overrode
>> the weston-ivi.ini by default loading hmi-controller. Now they get
>> loaded both, and hmi-controller init races to break the tests.
>>
>> Could you figure out a fix for this, please?
>>
>> I suppose adding a delay in the test client would make the test fail
>> always, perhaps.
>
> I actually see the hmi-controller module  being loaded in both good
> (make -j8 check) and bad (make -j8 distcheck) setups. It looks like
> the only difference is timing, both in terms of load and also
> ordering.
>
> On a good run, surface_properties_changed_notification() and
> surface_on_many_layer() come very early on, before
> weston-ivi-shell-user-interface is ready (this appears to take
> 700ms?). On a bad run, these are sequenced later.
> ivi-shell-user-interface signalling ready will create a
> surface-creation notification listener inside hmi-controller, which
> will add surfaces to the application layer. This causes
> surface_properties_changed_notification() to fail, as the layer
> addition has dirtied the surface and caused
> ivi_layout_commit_changes() to generate a notification for this. It
> also causes surface_on_many_layer() to fail, as it is on the three
> test layers as well as the ivi-shell-user-interface application layer.
>
The following two questions come to mind:
 - app bugs - using threads? ivi-shell-user-interface.c mentions
pthread, but haven't looked closely
 - missing dependencies

Having a look reveals:
 - extremely convoluted test runner
 - dummy BACKEND variable - always headless-backend.so
 - the --backend, --config, --shell and/or --modules file is not part
of the respective dependency chain

Please take the above with a pinch of salt.

HTH
Emil
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