Daniel Jacobowitz wrote:
> On Sun, Mar 17, 2002 at 03:22:04AM +0800, Stas Bekman wrote:
>
>>Thanks Daniel,
>>
>>I guess first of all we are after being able to use the debugger with
>>threads at all, next working on the speed. If I knew how to make gdb
>>automatically switch to the thread which I want that would be a first
>>big step (i don't know which thread number do I want). What I see
>>currently is this: (I'm running on dual-proc smp kernel) I've a bp set
>>and I press 'continue' and at random I get my thread which runs the code
>>but most of the time not. I suppose this has to do with threads
>>scheduling and its interaction with the debugger.
>>
>
> Well, the same code is being called in the thread you want and another?
> How do you know which thread you want?
>
> GDB supports both thread-specific breakpoints and conditional
> breakpoints. From the manual, you can do things like:
> (gdb) break main thread 1 if a == 2
>
> So if you can express the condition that says "this is my thread", you
> can do
> (gdb) break apr_poll if thread->magic == MY_MAGIC
> or whatever.
Interesting. Has anybody an idea what would be the condition in httpd
threads? looking through worker.c I cannot see any variables I can have
in the scope of the running thread. How do I refer to the thread, while
I'm inside of it so I can get get to its local storage?
>>define bring_me_there
>> continue
>> continue
>> continue
>> continue
>> continue
>> continue
>> continue
>> continue
>> continue
>> continue
>> continue
>> continue
>> continue
>>end
>>
>
> I recommend looking up the "ignore" command, if you want to skip a
> breakpoint N times.
Thanks Daniel, that works:
# threads specific
define bring_me_there
# ignoring apr_poll (bp 3) 12 times
ignore 3 12
continue
end
I wish there was a syntax allowing to do it by name rather by number.
--
_____________________________________________________________________
Stas Bekman JAm_pH -- Just Another mod_perl Hacker
http://stason.org/ mod_perl Guide http://perl.apache.org/guide
mailto:[EMAIL PROTECTED] http://ticketmaster.com http://apacheweek.com
http://singlesheaven.com http://perl.apache.org http://perlmonth.com/
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
