Re: [PATCH v2] perf trace: Segfault when trying to trace events by cgroup

From: Namhyung Kim
Date: Tue Oct 27 2020 - 01:10:59 EST


Hello,

On Mon, Oct 26, 2020 at 10:21 PM Stanislav Ivanichkin
<sivanichkin@xxxxxxxxxxxxxx> wrote:
>
> v2:
> - struct declaration fixed (Namhyung Kim)
>
> Fixes: 9ea42ba4411ac ("perf trace: Support setting cgroups as targets")
> Signed-off-by: Stanislav Ivanichkin <sivanichkin@xxxxxxxxxxxxxx>

Looks ok but you'd better add the commit description in v1.

Acked-by: Namhyung Kim <namhyung@xxxxxxxxxx>

Thanks
Namhyung

> ---
> tools/perf/builtin-trace.c | 15 +++++++++------
> 1 file changed, 9 insertions(+), 6 deletions(-)
>
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index 44a75f234db1..de80534473af 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -4639,9 +4639,9 @@ static int trace__parse_events_option(const struct option *opt, const char *str,
> err = 0;
>
> if (lists[0]) {
> - struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event",
> - "event selector. use 'perf list' to list available events",
> - parse_events_option);
> + struct option o = {
> + .value = &trace->evlist,
> + };
> err = parse_events_option(&o, lists[0], 0);
> }
> out:
> @@ -4655,9 +4655,12 @@ static int trace__parse_cgroups(const struct option *opt, const char *str, int u
> {
> struct trace *trace = opt->value;
>
> - if (!list_empty(&trace->evlist->core.entries))
> - return parse_cgroups(opt, str, unset);
> -
> + if (!list_empty(&trace->evlist->core.entries)) {
> + struct option o = {
> + .value = &trace->evlist,
> + };
> + return parse_cgroups(&o, str, unset);
> + }
> trace->cgroup = evlist__findnew_cgroup(trace->evlist, str);
>
> return 0;
> --
> 2.17.1
>