On Mon, Aug 29, 2011 at 11:17 PM, Christopher Michael
<cpmicha...@comcast.net> wrote:
> On 08/29/2011 05:08 PM, Cedric BAIL wrote:
>> On Mon, Aug 29, 2011 at 10:51 PM, Christopher Michael
>> <cpmicha...@comcast.net>  wrote:
>>> On 08/29/2011 02:20 PM, Tom Hacohen wrote:
>>>> On 29/08/11 19:06, Christopher Michael wrote:
>>>>>
>>>>> gdb attach<pid>
>>>>> (gdb) set unwindonsignal on
>>>>> (gdb) call eina_stringshare_del(234234)
>>>>>
>>>>> works in that it makes it possible to debug using gdb like you are
>>>>> (calling efl functions inside gdb).
>>>>>
>>>>> As far as the alert dialog working (restart/exit), we know it works
>>>>> when
>>>>> E receives the signal from modules, etc. The problem you are
>>>>> experiencing could be from gdb catching the signals instead of E, or it
>>>>> could be due to xcb being threaded...not entirely sure which one, but
>>>>> the alert code itself does work.
>>>>>
>>>>> If you compare the changes to the old alert code and this version, you
>>>>> will see that there is not much difference really (aside from xcb doing
>>>>> the dialog drawing) so I am not sure that This even worked in the old
>>>>> version. If it did work previously, then it could just be the threaded
>>>>> nature of xcb which is the problem, but as such there is not much can
>>>>> be
>>>>> done about that...I can't change xcb's threaded nature ;)
>>>>>
>>>>> I don't know enough about what gdb is doing wrt signals to dig much
>>>>> deeper into this. Do we have any gdb gurus that could help ??
>>>>
>>>> Sorry, I was'nt clear: call eina_stringshare_del like you did, *detach
>>>> gdb* and then press F1/press the button. And still, it fails... This has
>>>> nothing to do with gdb, it just fails, so no need for gdb gurus.
>>>>
>>>> Please check that out.
>>>>
>>>> --
>>>> Tom.
>>>>
>>>
>>> Sadly, there is not much I can do here :( I keep trying your method of
>>> reproduction, but I cannot get (or see) any meaningful reason why this
>>> is failing. The only thing I did see that was curious was:
>>>
>>> When running like this (using gdb to call efl functions and produce an
>>> error), the e_signal functions do get called, which in turn does call
>>> e_alert_main (thus the white box), BUT what I see happening is that gdb
>>> is intercepting the kill(e_pid, SIGUSR2). This causes major problems !!!
>>> as now E itself is stuck in pause thus when e_alert_main tries to send
>>> the 'restart' command, E never gets to processes it because it (E) is
>>> still stuck in pause because gdb intercepted the sigusr2.
>>>
>>> I am not sure what (if anything) can be done wrt this. The best advise I
>>> can give would be to use the 'set unwindonsignal on' as this allows E to
>>> receive the SIGUSR2 and thus continue with the restart.
>>
>> If that's the issue, why don't we simplify the code of e_alert by
>> directly using fork/exec/waitpid and taking the exit code of
>> enlightenment_alert as the order. Exit code of 0 mean exit and 1
>> restart. That would simplify a lot the code path of both part
>> (something that make sense when you are already in bad shape).
>
> I would not be against that as an option :) It does make more sense. If I
> can find some time soon, I'll go ahead and do that...if not, it may have to
> wait a little while.

Ok, I just experienced the White Death Box and I confirm it's borken !
If you don't have the time to fix it, tell me, the code look pretty
simple to do the modification and I can do it quickly as it's a little
bit annoying :-)
-- 
Cedric BAIL

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