[Samba] FW: Questions about Samba 4

[Rowland Penny]

On 26/08/15 22:31, John Yocum wrote:
> On 08/26/2015 02:21 PM, Rowland Penny wrote:
>> On 26/08/15 22:13, Jeremy Allison wrote:
>>> On Wed, Aug 26, 2015 at 09:46:48PM +0100, Rowland Penny wrote:
>>>>> ... stuff I'm interested in...
>>>>>
>>>>> Then paste the "... stuff I'm interested in..."
>>>>> output into the bug report.
>>>>>
>>>>> I'm assuming winbindd has been built with -g (DEBUG)
>>>>> turned on.
>>>> OK, does '(no debugging symbols found)' mean what I think it means ?
>>>> i.e. winbindd wasn't built with -g
>>> Yep :-(.
>>>
>>>> ... stuff I'm interested in... is just:
>>>>
>>>>    (gdb) bt
>>>> #0  0x00007f8d0cf0b12f in ?? ()
>>>> #1  0x0000000000000000 in ?? ()
>>>> (gdb)
>>> Yeah, that doesn't help :-).
>>>
>>>> If this is what you are looking for I will add it to the bug report
>>>> 11038, if not, I will have to download the src deb for winbindd and
>>>> rebuild it with -g , but this will have to wait until tomorrow.
>>> OK, no problem. Rebuilding with -g is what is needed here.
>>>
>>> The other thing that helps is to attach to the process
>>> using strace,
>>>
>>>
>>> # strace -p WINBINDD_SPINNING_PID
>>>
>>> - which should give a looping amount of system call
>>> output which would also be helpful.
>> OK, I have downloaded the source and looking at debian/rules file (which
>> seems to have been written by someone called Jelmer Vernooij (where have
>> heard that name before ?)) I think I need to add '--enable-debug' to the
>> 'conf_args' list, but there is also this:
>>
>> override_dh_strip:
>>          # add debug symbols for all samba packages to the same debug
>> package
>>          dh_strip -a --dbg-package=samba-dbg
>>
>> Do I need to do anything with this ?
>>
>> Rowland
>>
>>
> Install the "samba-dbg" package. It contains the debug symbols. Once
> installed, restart winbind, and try using gdb again.
>

Thanks for the hint, but it didn't work, still got lots of '(no 
debugging symbols found)' and the same result as before. What I did 
notice was when I tried 'strace -p WINBINDD_SPINNING_PID' I only got 
'Process 3980 attached'
in the output and the 'WINBINDD_SPINNING_PID' dropped out of the 'top' 
screen, does this mean anything ?

Anyway, I will rebuild samba tomorrow and try again.

Rowland