Re: Segmentation fault using `lttv -m textDump...' on 2.6.24

Jan Kiszka <[email protected]> writes:

> Andrew McDermott wrote:
>> Hi,
>> 
>> I have taken kernel.org 2.6.24 and patched with
>> patch-2.6.24-rc8-git3-lttng-0.10-pre42.tar.bz2 -- I couldn't find
>> anything later than this so I assume this represents the patch series
>> for 2.6.24.
>
> http://ltt.polymtl.ca/lttng/patch-2.6.24-lttng-0.10-pre43.tar.bz2
> (It's a bit tricky to find on that page...)

With that patch set and the ltt-armall I'm able to collect and view a
trace.  Thanks!

>
>> 
>> On top of that I have taken:
>> 
>>   lttv-0.10.0-pre10-18012008.tar.gz &
>>   ltt-control-0.47-25012008.tar.gz
>> 
>> I have collected a trace using:
>> 
>>   lttctl -n trace3 -l /mnt/debugfs/ltt -t /tmp/trace3 -d
>> 
>> and stopped using:
>> 
>>   lttctl -n trace3 -l /mnt/debugfs/ltt -t /tmp/trace3 -f
>> 
>>     Linux Trace Toolkit Trace Control 0.47-25012008
>>     Controlling trace : trace3
>>     Linux Trace Toolkit Trace Daemon 0.47-25012008
>>     Reading from debugfs directory : /mnt/debugfs/ltt/trace3
>>     Writing to trace directory : /tmp/trace3
>> 
>> I have some data in the trace:
>> 
>>     ls -lR /tmp/trace3/
>> 
>>     /tmp/trace3/:
>>     total 1032
>>     drwxr-xr-x 2 root root    4096 Feb 18 11:13 control
>>     -rwxr-xr-x 1 root root 1048576 Feb 18 11:13 cpu_0
>> 
>>     /tmp/trace3/control:
>>     total 532
>>     -rwxr-xr-x 1 root root  65536 Feb 18 11:13 facilities_0
>>     -rwxr-xr-x 1 root root  65536 Feb 18 11:13 interrupts_0
>>     -rwxr-xr-x 1 root root  65536 Feb 18 11:13 modules_0
>>     -rwxr-xr-x 1 root root  65536 Feb 18 11:13 network_0
>>     -rwxr-xr-x 1 root root 262144 Feb 18 11:13 processes_0
>> 
>> I then try and decode the trace but get the following error:
>> 
>>   lttv -m textDump -t /tmp/trace3
>> 
>> ** (process:27426): WARNING **: No marker of name kernel_arch_syscall_entry found
>
> Classic mistake I tend to repeat far too often as well:
>
> Call ltt-armall first! :)
>
>> 
>> (process:27426): GLib-CRITICAL **: g_array_remove_range: assertion `index_ < array->len' failed
>> 
>> ** (process:27426): WARNING **: No marker of name kernel_arch_trap_entry found
>> /usr/local/lttv-0.10.0-pre10/bin/lttv: line 15: 27426 Segmentation fault      $0.real $*
>> 
>> Any clues?  Have I missed a step?  Is there a step that I haven't
>> taken that is new with 2.6.24.  The last time I tried this the
>> sequence worked with 2.6.21.
>> 
>> Thanks for any help...
>> 
>
> Jan
>
> -- 
> Siemens AG, Corporate Technology, CT SE 2
> Corporate Competence Center Embedded Linux

-- 
andy