[PATCH 5.15 30/37] perf parse-events: Identify broken modifiers

[Greg Kroah-Hartman]

From: Ian Rogers <irogers@xxxxxxxxxx>

[ Upstream commit eabd4523395e4a8f2b049165642801f2ab8ff893 ]

Previously the broken modifier causes a usage message to printed but
nothing else.

After:

  $ perf stat -e 'cycles:kk' -a sleep 2
  event syntax error: 'cycles:kk'
                              \___ Bad modifier
  Run 'perf list' for a list of valid events

   Usage: perf stat [<options>] [<command>]

      -e, --event <event>   event selector. use 'perf list' to list available events

  $ perf stat -e '{instructions,cycles}:kk' -a sleep 2
  event syntax error: '..ns,cycles}:kk'
                                    \___ Bad modifier
  Run 'perf list' for a list of valid events

   Usage: perf stat [<options>] [<command>]

      -e, --event <event>   event selector. use 'perf list' to list available events

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
Acked-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Alexander Antonov <alexander.antonov@xxxxxxxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Andrew Kilroy <andrew.kilroy@xxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Changbin Du <changbin.du@xxxxxxxxx>
Cc: Denys Zagorui <dzagorui@xxxxxxxxx>
Cc: Fabian Hemmer <copy@xxxxxxx>
Cc: Felix Fietkau <nbd@xxxxxxxx>
Cc: Heiko Carstens <hca@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jacob Keller <jacob.e.keller@xxxxxxxxx>
Cc: Jiapeng Chong <jiapeng.chong@xxxxxxxxxxxxxxxxx>
Cc: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Joakim Zhang <qiangqing.zhang@xxxxxxx>
Cc: John Garry <john.garry@xxxxxxxxxx>
Cc: Kajol Jain <kjain@xxxxxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Cc: Kees Kook <keescook@xxxxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Nicholas Fraser <nfraser@xxxxxxxxxxxxxxx>
Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Cc: Paul Clarke <pc@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Riccardo Mancini <rickyman7@xxxxxxxxx>
Cc: Sami Tolvanen <samitolvanen@xxxxxxxxxx>
Cc: ShihCheng Tu <mrtoastcheng@xxxxxxxxx>
Cc: Song Liu <songliubraving@xxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: Sumanth Korikkar <sumanthk@xxxxxxxxxxxxx>
Cc: Thomas Richter <tmricht@xxxxxxxxxxxxx>
Cc: Wan Jiabing <wanjiabing@xxxxxxxx>
Cc: Zhen Lei <thunder.leizhen@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20211015172132.1162559-21-irogers@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Stable-dep-of: 71c86cda750b ("perf parse-events: Remove "not supported" hybrid cache events")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 tools/perf/util/parse-events.y | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index d94e48e1ff9b..467a426205a0 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -183,6 +183,11 @@ group_def ':' PE_MODIFIER_EVENT
 	err = parse_events__modifier_group(list, $3);
 	free($3);
 	if (err) {
+		struct parse_events_state *parse_state = _parse_state;
+		struct parse_events_error *error = parse_state->error;
+
+		parse_events__handle_error(error, @3.first_column,
+					   strdup("Bad modifier"), NULL);
 		free_list_evsel(list);
 		YYABORT;
 	}
@@ -240,6 +245,11 @@ event_name PE_MODIFIER_EVENT
 	err = parse_events__modifier_event(list, $2, false);
 	free($2);
 	if (err) {
+		struct parse_events_state *parse_state = _parse_state;
+		struct parse_events_error *error = parse_state->error;
+
+		parse_events__handle_error(error, @2.first_column,
+					   strdup("Bad modifier"), NULL);
 		free_list_evsel(list);
 		YYABORT;
 	}
-- 
2.35.1