[PATCH v1 1/2] perf metrics: Avoid segv if default metricgroup isn't set

[Arnaldo Carvalho de Melo]

Em Mon, Dec 04, 2023 at 02:44:54PM -0800, Ilkka Koskinen escreveu:
> 
> 
> On Mon, 4 Dec 2023, Ian Rogers wrote:
> > A metric is default by having "Default" within its groups. The default
> > metricgroup name needn't be set and this can result in segv in
> > default_metricgroup_cmp and perf_stat__print_shadow_stats_metricgroup
> > that assume it has a value when there is a Default metric group. To
> > avoid the segv initialize the value to "".
> > 
> > Fixes: 1c0e47956a8e ("perf metrics: Sort the Default metricgroup")
> > Signed-off-by: Ian Rogers <irogers at google.com>
> 
> Thanks! I was going to look for the bug but got pulled to other tasks. The
> patch looks good to me and I tested it successfully on AmpereOne.
> 
>   Reviewed-and-tested-by: Ilkka Koskinen <ilkka at os.amperecomputing.com>

Thanks, applied to perf-tools-next.

- Arnaldo