linux-kernel - [PATCH v4 3/3] perf parse: Allow names to start with digits

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Date: Fri, 10 May 2024 07:24:32 +0900
From: Dominique Martinet <asmadeus@...ewreck.org>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
 Arnaldo Carvalho de Melo <acme@...nel.org>, 
 Namhyung Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>, 
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
 Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>, 
 Adrian Hunter <adrian.hunter@...el.com>
Cc: linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Dominique Martinet <asmadeus@...ewreck.org>
Subject: [PATCH v4 3/3] perf parse: Allow names to start with digits

Tracepoints can start with digits, although we don't have many of these:

$ rg -g '*.h' '\bTRACE_EVENT\([0-9]'
net/mac802154/trace.h
53:TRACE_EVENT(802154_drv_return_int,
..

net/ieee802154/trace.h
66:TRACE_EVENT(802154_rdev_add_virtual_intf,
..

include/trace/events/9p.h
124:TRACE_EVENT(9p_client_req,
..

Just allow names to start with digits too so e.g. perf trace -e '9p:*'
works

Reviewed-by: Ian Rogers <irogers@...gle.com>
Tested-by: Ian Rogers <irogers@...gle.com>
Signed-off-by: Dominique Martinet <asmadeus@...ewreck.org>
---
 tools/perf/tests/parse-events.c | 7 +++++++
 tools/perf/util/parse-events.l  | 4 ++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
index c3b77570bb57..edc2adcf1bae 100644
--- a/tools/perf/tests/parse-events.c
+++ b/tools/perf/tests/parse-events.c
@@ -2269,6 +2269,13 @@ static const struct evlist_test test__events[] = {
 		.check = test__checkevent_breakpoint_2_events,
 		/* 3 */
 	},
+#ifdef HAVE_LIBTRACEEVENT
+	{
+		.name = "9p:9p_client_req",
+		.check = test__checkevent_tracepoint,
+		/* 4 */
+	},
+#endif
 };
 
 static const struct evlist_test test__events_pmu[] = {
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index 08ea2d845dc3..99d585d272e0 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -242,8 +242,8 @@ event		[^,{}/]+
 num_dec		[0-9]+
 num_hex		0x[a-fA-F0-9]{1,16}
 num_raw_hex	[a-fA-F0-9]{1,16}
-name		[a-zA-Z_*?\[\]][a-zA-Z0-9_*?.\[\]!\-]*
-name_tag	[\'][a-zA-Z_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\']
+name		[a-zA-Z0-9_*?\[\]][a-zA-Z0-9_*?.\[\]!\-]*
+name_tag	[\'][a-zA-Z0-9_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\']
 name_minus	[a-zA-Z_*?][a-zA-Z0-9\-_*?.:]*
 drv_cfg_term	[a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)?
 /*

-- 
2.44.0