[Crash-utility] Retrieve pointer value for scripting

[Patrick Agrain]

Thanks to all,

I'll give it a try. Looks good.

Regards,
Patrick Agrain

Le 06/12/2013 10:52, Buland Kumar Singh a écrit :
> Forgot to mentioned the following step;  ;)
>
> crash> < rd_stack_number |head -n 6
> crash> rd 0xffffffff81a00000 3
> ffffffff81a00000:  ffffffff81a8d020 ffffffff81a9a8a0 ...............
> ffffffff81a00010:  0000000400000000                    ........
> crash> rd 0xffff88106961e000 3
> ffff88106961e000:  ffff884069dd8040 ffffffff81a9a8a0 @..i at ...........
> ffff88106961e010:  0000000400000000                    ........
>
>
>
>
> On 6 December 2013 15:20, Buland Kumar Singh <6b65726e656c at gmail.com 
> <mailto:6b65726e656c at gmail.com>> wrote:
>
>     Hi Patrick,
>
>     You can use the combination of foreach, awk and cut commands to
>     get the
>     desired results.
>
>     Eg:
>     crash> foreach RU task|grep " stack =" |awk '{print $3}'|cut -f1
>     -d"," |awk '{print "rd "$1 " " 3 }' > rd_stack_number
>
>     crash> rd 0xffffffff81a00000 3
>     ffffffff81a00000:  ffffffff81a8d020 ffffffff81a9a8a0 ...............
>     ffffffff81a00010:  0000000400000000 ........
>     crash> rd 0xffff88106961e000 3
>     ffff88106961e000:  ffff884069dd8040 ffffffff81a9a8a0 @..i at ...........
>     ffff88106961e010:  0000000400000000 ........
>
>     The above example is some what similar to the Louis example.
>
>     -- BKS
>
>
>
>     On 6 December 2013 14:32, Patrick Agrain
>     <patrick.agrain at alcatel-lucent.com
>     <mailto:patrick.agrain at alcatel-lucent.com>> wrote:
>
>         Hello,
>
>         We wish to call 'crash' with a script file to automate some
>         basic command and output the result on a text file.
>
>         This works perfectly for basic commands such as bt, log, mod
>         and so on, especially when no input data is required.
>
>         We try now to dump the kernel stack through a 'rd <@> <size>'.
>         My problem is to "extract" this <@> and to "input" it in this
>         'rd' command.
>
>         For the moment, I'm able to get the task_struct * with
>         following command :
>         ps | grep '>' | awk '{ print $5 };'
>
>         >From that, the pointer of the thread_info would be available
>         through (task_struct *)->stack.
>
>         But how to get all these together to finally ouptut a valid
>         'rd' command ?
>         Meaby another way to get this kernel stack dump would exist ?
>
>         Any help would be appreciate.
>         Regards,
>         Patrick Agrain
>
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>
>
>
>
>     -- 
>     BKS
>
>
>
>
> -- 
> BKS
>
>
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