Function tracing not working
Mathieu Desnoyers
mathieu.desnoyers at efficios.com
Fri Jun 6 14:14:25 EDT 2025
On 2025-06-06 10:37, David Aldrich wrote:
> Hi Mathieu
>
>> Indeed, You will also need to enable something like this:
>>
>> lttng enable-event --userspace 'lttng_ust_cyg_profile:*'
>>
>> See "man 3 lttng-ust-cyg-profile" for details.
>
> Thanks for this. I used your suggested command and can now see the
> Flame Chart (Incubator). However, I only see symbol addresses, not the
> actual symbolic names.
>
> I compile with:
>
> -O3 -pg -finstrument-functions
>
> Do I need any other compiler/linker options to resolve the symbol names?
Yes. Resolving addresses to symbol names requires to know the
base addresses where the executable mappings are loaded.
See:
man 7 babeltrace2-filter.lttng-utils.debug-info
for a detailed explanation about what needs to be enabled.
Thanks,
Mathieu
>
> Best regards
> David
--
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com
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