[JDEV] Re: [Mac-dev] How to avoid crash on Apple OS X : workaround

[Jabber Developer]

Sorry for the formatting for my previous post! My mailer 
screw up everything.
Below (hopefuly) the correct content!

Hi

A good news : 

I have jabber running without a crash (at least in my tests) 
on my Apple Mac OS X system.
The workaround is ugly and someone in the core Jabber 
team should investigate what's happening there.
First the workaround to make jabber :
1. in mio.c when spawning the mio_main thread, add 
        pth_attr_set(attr, PTH_ATTR_NAME, "mio_main");
before :
         
mio__data->t=pth_spawn(attr,(void*)_mio_main,NULL);

==> this step is important because now 
we will customize the pth library to handle particulary this 
thread!! I know 
it's ugly that why someone need to look into it!

2. in pth-1.3.7, modify pth_sched.c :
add the code below :
if (pth_current != NULL && strcmp( pth_current->name, 
"mio_main") == 0) {
    sa.sa_handler = pth_sched_eventmanager_sighandler;
    sigfillset(&sa.sa_mask);
    sa.sa_flags = 0;
    sigaction(SIGUSR2, &sa, &osa[SIGUSR2]);
}

before :
 pth_sc(sigprocmask)(SIG_SETMASK, &pth_sigblock, 
&oss);

==> what it does (if I understand correctly this part of the 
code) : it add the SIGUSR2 signal in the list of handler that 
should be catched... without this code it seems that the 
SIGUSR2 used by the mio_write is raised but without any 
handler installed and so generate the crash.
Why the handler was removed from the list I do not know, 
and that's the main problem for all the crash I think.

3. You can apparently safely remove the other changes I 
mentionned in mio.c :
you can put back the pth_yield() at it's initial place, and 
remove the pth_usleep() 

Please jabber developer on OS X give it a try and let me 
know if it's working.

hope it helps!