gdb and cloned process

Lukasz Lempart
Thu Oct 23 20:30:00 GMT 2008

On Thu, Oct 23, 2008 at 11:26 AM, Michael Snyder <> wrote:
> Daniel Jacobowitz wrote:
>> On Wed, Oct 22, 2008 at 05:09:32PM -0700, Lukasz Lempart wrote:
>>> How does gdb (through libthread_db) figure out what threads belong to a
>>> process?
>> The thread library maintains an internal list of threads.  If you've
>> cloned the process, without telling the C library about that, you're
>> going to end up with the same list of threads; so the behavior you
>> describe is not surprising.
>>> Is there currently a way to disable thread debugging in gdb?
>> Not really.  You might be able to preload a dummy
>> that always failed to detect new threads.
> What if you strip  Isn't that supposed to
> cause thread debugging to fail?

Stripping seems to do the trick. Thanks for the
suggestion. Keeping both version of the library around and just
changing LD_LIBRARY_PATH to point to the one I want seems to be the
most portable way to handle debugging both the original and the cloned
process. A gdb command to turn on/off thread debugging would be very
nice to have though.

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