[patch] Suggest running gdbserver for a PID in container

[Daniel Colascione]

On 03/15/2016 03:07 PM, Jan Kratochvil wrote:
> Hi,
> 
> currently
> 	gdb -p <pid from a container>
> will print:
> 	warning: Target and debugger are in different PID namespaces; thread lists and other data are likely unreliable
> 
> BTW it is a bit lost in all the other messages.  Full screen output is in:
> 	https://sourceware.org/bugzilla/show_bug.cgi?id=19828
> 
> It correctly states the problem but it does not say how to solve it.

We (FB) just treat the container as an entirely separate machine and
debug processes inside it using gdbserver.

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