diff options
| author |   Jiri Olsa <jolsa@kernel.org> | 2018-06-05 14:14:16 +0200 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-06-06 12:52:05 -0300 |
| commit | ceac7b79df7bd67ef9aaf464b0179a2686aff4ee (patch) | |
| tree | 7ab7715776e65144bfc474eb2ae07829d8a09cf2 /tools | |
| parent | perf stat: Display user and system time (diff) | |
| download | linux-dev-ceac7b79df7bd67ef9aaf464b0179a2686aff4ee.tar.xz linux-dev-ceac7b79df7bd67ef9aaf464b0179a2686aff4ee.zip | |
perf tools: Fix pmu events parsing rule
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>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180605121416.31645-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/parse-events.y | 14 |
1 files changed, 13 insertions, 1 deletions
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; |