Re: elfutls using assert

[Andrew Cagney <cagney@redhat.com>]

Roland McGrath wrote:
>> Unless I'm mistaken, it isn't possible to attach the abort signal as it 
>> may be sent to any thread?  
>>     
>
>   

Good, I'll add code to attempt that.

> You are mistaken.  If you are catching the signal, you will catch all such
> signals in whatever thread they are delivered.  Anyway, abort is equivalent
> to raise (SIGABRT), which means synchronously to the calling thread (the
> signal will appear to happen immediately after the syscall instruction for
> the syscall that performs the "raise").
>
>   
>> Anyway, to make the problem more concrete, when a panic like this occurs,
>> frysk needs time to pull all inserted breakpoints before detaching from
>> the program and exiting.
>>     
>
> Like I said, when one of these hits, you are lucky if all memory is not
> randomly clobbered already.  But if you just avoid anything that would call
> into elfutils libs at all, you might be avoiding the memory that is
> definitely clobbered already, and be lucky enough to survive long enough to
> withdraw gracefully.
>
>
> Thanks,
> Roland
>