[Crash-utility] Retrieve pointer value for scripting

[Buland Kumar Singh]

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> 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> 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
>>
>> --
>> Crash-utility mailing list
>> Crash-utility at redhat.com
>> https://www.redhat.com/mailman/listinfo/crash-utility
>>
>
>
>
> --
> BKS
>



-- 
BKS
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