Re: PT_EXITKILL (Was: pdeath_signal)

[Pedro Alves]

On 11/08/2012 12:44 PM, Oleg Nesterov wrote:
> On 11/08, Pedro Alves wrote:

>> If this isn't inherited by the ptrace child's children, a fork child can
>> end up detached if the tracer dies before it had a chance of setting
>> the PTRACE_O_EXITKILL on the new auto-attached child.
> 
> It is copied like the other options.

Oh, you're right.  I got confused - GDB has code to always set options
on the fork children after PTRACE_EVENT_(V)FORK.   Dunno where that came from.

>> Which sounds like another argument for PTRACE_O_INHERIT, as in:
>> http://sourceware.org/ml/archer/2011-q1/msg00026.html
> 
> 	The point of PTRACE_O_INHERIT would be to attach newly-created threads and
> 	children without causing an event stop and the attendant overhead.
> 
> this is another thing, I guess.

Yes, yes.

-- 
Pedro Alves

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