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

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Date: Sun, 07 Apr 2024 21:18:21 +0900
From: Dominique Martinet <asmadeus@...ewreck.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>, 
 Jiri Olsa <jolsa@...nel.org>, Peter Zijlstra <peterz@...radead.org>, 
 Ingo Molnar <mingo@...hat.com>, Namhyung Kim <namhyung@...nel.org>, 
 Mark Rutland <mark.rutland@....com>, 
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
 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 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 probe -e '9p:*'
works

Signed-off-by: Dominique Martinet <asmadeus@...ewreck.org>
---
 tools/perf/tests/parse-events.c | 5 +++++
 tools/perf/util/parse-events.l  | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
index ef056e8740fe..6cf055dd5c09 100644
--- a/tools/perf/tests/parse-events.c
+++ b/tools/perf/tests/parse-events.c
@@ -2280,6 +2280,11 @@ static const struct evlist_test test__events[] = {
 		.check = test__checkevent_breakpoint_2_events,
 		/* 3 */
 	},
+	{
+		.name = "9p:9p_client_req",
+		.check = test__checkevent_tracepoint,
+		/* 4 */
+	},
 };
 
 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 e86c45675e1d..41c30ff29783 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -158,7 +158,7 @@ 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		[a-zA-Z0-9_*?\[\]][a-zA-Z0-9_*?.\[\]!\-]*
 name_tag	[\'][a-zA-Z_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\']
 name_minus	[a-zA-Z_*?][a-zA-Z0-9\-_*?.:]*
 drv_cfg_term	[a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)?

-- 
2.43.0