Debugging init process.

[Alexander Leidinger]

Quoting Marius Nünnerich <marius at nuenneri.ch> (from Wed, 11 Mar 2009  
15:54:44 +0100):

> On Wed, Mar 11, 2009 at 08:51, Alexander Leidinger
> <Alexander at leidinger.net> wrote:
>> Quoting Nate Eldredge <neldredge at math.ucsd.edu> (from Tue, 10 Mar 2009
>> 19:02:16 -0700 (PDT)):
>>
>>> On Tue, 10 Mar 2009, vasanth raonaik wrote:
>>>
>>>> Hello Team,
>>>>
>>>> I need to debug init process. I am not able to attach init to gdb and it
>>>> throws
>>>
>>> As others mentioned, this is explicitly disabled.  You could re-enable it
>>> by hacking the kernel, but it could cause other unexpected problems.
>>>
>>> Alternatively, there's always "printf debugging".
>>>
>>> What is wrong with init, that you need to debug it?  It's a fairly simple
>>> program that's been around for a long time and should be pretty stable.
>>
>> If this is on -current and depending on the problem, dtrace may be an option
>> (I don't know if it special-cases init or not).
>>
>
> DTrace is not available for userland processes yet.

Depending on what is needed (it may not be needed to attach gdb, it  
may be sufficient to have something like ktrace, the OP didn't specify  
the problem), DTrace may suit the needs.

Bye,
Alexander.

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