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Re: [libvirt] [PATCH] Augment bug reporting documentation



On 11/10/2010 05:18 AM, Daniel Veillard wrote:
> On Wed, Nov 10, 2010 at 11:34:23AM +0000, Daniel P. Berrange wrote:
>> On Wed, Nov 10, 2010 at 11:01:15AM +0100, Daniel Veillard wrote:
>>> With some instruction on how to attach useful gdb backtraces
> [...]
>>> +      <pre> #  ps -o etime,pid `pgrep libvirt`
>>> +... note the process id from the output
>>> +# gdb /usr/sbin/libvirtd
>>> +.... some informations about gdb and loading debug data
>>> +(gdb) attach $the_damon_process_id
>>> +....
>>> +(gdb) thread apply all bt
>>> +.... informations to attach to the bug
>>> +(gdb)
>>> +</pre>
>>
>> You don't need to specify the  /usr/sbin/libvirtd binary name on the
>> command line to GDB if you're about to use 'attach', because GDB will
>> find it automatically from the PID, but ACK anyway
> 
>   okay, just that I always do it that way, and since that's the only
> example of gdb usage on that page, being a bit more complete should
> not hurt :-)

Personally, I use

gdb /proc/nnn/exe nnn

when I know the process I want to debug, but not its location.  Then I
don't have to do an apply step inside gdb.  But what you pushed is fine :)

-- 
Eric Blake   eblake redhat com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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