how to debug gdb?

[Tomasz Gajewski]

Hi Christian,

Christian Prochaska <christian.prochaska at genode-labs.com> writes:

> Hi Tomasz,
>
> On 06.05.21 12:42, Tomasz Gajewski wrote:
>> Currently I stumbled on problem with threads too. I know that creating
>> thread using 'pthread_create' in debugged code does not raise any error
>> but after this call number of thread visible in gdb (using 'info
>> thread') does not change and breakpoint set inside a function assigned
>> for thread is never triggered.
>>
>>
>> Does anybody know if it is a sign of not creating thread at all or some
>> deficiency in 'gdb_monitor' that fails to update presented list of
>> threads? From the behavior it seems it is a first option.
>>
>> Another question is if it is supposed to work and it doesn't only
>> because of some error or gdb_monitor lacks this functionality
>> completely?
>
> can you somehow reproduce the problem with the gdb monitor test which
> is used by gdb_monitor.run? This test also creates a pthread
> and the breakpoint in 'test_thread_start()' appears to work as well as
> the appearance in the thread info list.

I'll experiment in the evening, compare bahavior and let know
results. Your answer is encouraging. Thanks.

-- 
Tomasz Gajewski