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.

dh

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