Messages in this thread Patch in this message | | | From | Jiri Olsa <> | Subject | [PATCH] perf tools: Fix pmu events parsing rule | Date | Tue, 5 Jun 2018 14:14:16 +0200 |
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Currently all the event parsing fails end up in the event_pmu rule, and display misleading help like:
$ perf stat -e inst kill event syntax error: 'inst' \___ Cannot find PMU `inst'. Missing kernel support? ...
The reason is that the event_pmu is too strong and match also single string. Changing it to force the '/' separators to be part of the rule, and getting the proper error now:
$ perf stat -e inst kill event syntax error: 'inst' \___ parser error Run 'perf list' for a list of valid events ...
Suggested-by: Adrian Hunter <adrian.hunter@intel.com> Link: http://lkml.kernel.org/n/tip-vgf5a8wk0eyayo7omvutwhqo@git.kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org> --- tools/perf/util/parse-events.y | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y index e37608a87dba..155d2570274f 100644 --- a/tools/perf/util/parse-events.y +++ b/tools/perf/util/parse-events.y @@ -73,6 +73,7 @@ static void inc_group_count(struct list_head *list, %type <num> value_sym %type <head> event_config %type <head> opt_event_config +%type <head> opt_pmu_config %type <term> event_term %type <head> event_pmu %type <head> event_legacy_symbol @@ -224,7 +225,7 @@ event_def: event_pmu | event_bpf_file event_pmu: -PE_NAME opt_event_config +PE_NAME opt_pmu_config { struct list_head *list, *orig_terms, *terms; @@ -496,6 +497,17 @@ opt_event_config: $$ = NULL; } +opt_pmu_config: +'/' event_config '/' +{ + $$ = $2; +} +| +'/' '/' +{ + $$ = NULL; +} + start_terms: event_config { struct parse_events_state *parse_state = _parse_state; -- 2.13.6
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