linux-kernel - [PATCH v4 35/44] perf parse-events: Avoid error when assigning a legacy cache term

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Message-Id: <20230502223851.2234828-36-irogers@google.com>
Date:   Tue,  2 May 2023 15:38:42 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Ahmad Yasin <ahmad.yasin@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Stephane Eranian <eranian@...gle.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Perry Taylor <perry.taylor@...el.com>,
        Samantha Alt <samantha.alt@...el.com>,
        Caleb Biggers <caleb.biggers@...el.com>,
        Weilin Wang <weilin.wang@...el.com>,
        Edward Baker <edward.baker@...el.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Florian Fischer <florian.fischer@...q.space>,
        Rob Herring <robh@...nel.org>,
        Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
        John Garry <john.g.garry@...cle.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        Sumanth Korikkar <sumanthk@...ux.ibm.com>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        Tiezhu Yang <yangtiezhu@...ngson.cn>,
        Ravi Bangoria <ravi.bangoria@....com>,
        Leo Yan <leo.yan@...aro.org>,
        Yang Jihong <yangjihong1@...wei.com>,
        James Clark <james.clark@....com>,
        Suzuki Poulouse <suzuki.poulose@....com>,
        Kang Minchul <tegongkang@...il.com>,
        Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Ian Rogers <irogers@...gle.com>
Subject: [PATCH v4 35/44] perf parse-events: Avoid error when assigning a
 legacy cache term

Avoid the parser error:
'''
$ perf stat -e 'cycles/name=l1d/' true
event syntax error: 'cycles/name=l1d/'
                                \___ parser error
'''
by combining the name and legacy cache cases in the parser.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/tests/parse-events.c | 21 +++++++++++++++++++++
 tools/perf/util/parse-events.y  | 10 ++++++----
 2 files changed, 27 insertions(+), 4 deletions(-)

diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
index eb893cc15878..72a10bed84fd 100644
--- a/tools/perf/tests/parse-events.c
+++ b/tools/perf/tests/parse-events.c
@@ -1509,6 +1509,16 @@ static int test__term_equal_term(struct evlist *evlist)
 	return TEST_OK;
 }
 
+static int test__term_equal_legacy(struct evlist *evlist)
+{
+	struct evsel *evsel = evlist__first(evlist);
+
+	TEST_ASSERT_VAL("wrong type", evsel->core.attr.type == PERF_TYPE_HARDWARE);
+	TEST_ASSERT_VAL("wrong config", test_config(evsel, PERF_COUNT_HW_CPU_CYCLES));
+	TEST_ASSERT_VAL("wrong name setting", strcmp(evsel->name, "l1d") == 0);
+	return TEST_OK;
+}
+
 #ifdef HAVE_LIBTRACEEVENT
 static int count_tracepoints(void)
 {
@@ -1886,6 +1896,11 @@ static const struct evlist_test test__events[] = {
 		.check = test__term_equal_term,
 		/* 8 */
 	},
+	{
+		.name  = "cycles/name=l1d/",
+		.check = test__term_equal_legacy,
+		/* 9 */
+	},
 };
 
 static const struct evlist_test test__events_pmu[] = {
@@ -2073,6 +2088,12 @@ static const struct evlist_test test__events_pmu[] = {
 		.check = test__term_equal_term,
 		/* 0 */
 	},
+	{
+		.name  = "cpu/cycles,name=l1d/",
+		.valid = test__pmu_cpu_valid,
+		.check = test__term_equal_legacy,
+		/* 1 */
+	},
 };
 
 struct terms_test {
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 0aaebc57748e..f4ee03b5976b 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -82,7 +82,7 @@ static void free_list_evsel(struct list_head* list_evsel)
 %type <str> PE_EVENT_NAME
 %type <str> PE_KERNEL_PMU_EVENT PE_PMU_EVENT_FAKE
 %type <str> PE_DRV_CFG_TERM
-%type <str> name_or_raw
+%type <str> name_or_raw name_or_legacy
 %destructor { free ($$); } <str>
 %type <term> event_term
 %destructor { parse_events_term__delete ($$); } <term>
@@ -739,6 +739,8 @@ event_term
 
 name_or_raw: PE_RAW | PE_NAME | PE_LEGACY_CACHE
 
+name_or_legacy: PE_NAME | PE_LEGACY_CACHE
+
 event_term:
 PE_RAW
 {
@@ -752,7 +754,7 @@ PE_RAW
 	$$ = term;
 }
 |
-name_or_raw '=' PE_NAME
+name_or_raw '=' name_or_legacy
 {
 	struct parse_events_term *term;
 
@@ -826,7 +828,7 @@ PE_TERM_HW
 	$$ = term;
 }
 |
-PE_TERM '=' PE_NAME
+PE_TERM '=' name_or_legacy
 {
 	struct parse_events_term *term;
 
@@ -872,7 +874,7 @@ PE_TERM
 	$$ = term;
 }
 |
-name_or_raw array '=' PE_NAME
+name_or_raw array '=' name_or_legacy
 {
 	struct parse_events_term *term;
 
-- 
2.40.1.495.gc816e09b53d-goog