From 5ceb57990bf41684e9bc186128a07025adb896bd Mon Sep 17 00:00:00 2001
From: Dominique Martinet <asmadeus@codewreck.org>
Date: Fri, 10 May 2024 07:24:32 +0900
Subject: [PATCH] perf parse: Allow tracepoint 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@google.com>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Tested-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240510-perf_digit-v4-3-db1553f3233b@codewreck.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 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 c3b77570bb57a..edc2adcf1baed 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 08ea2d845dc36..99d585d272e08 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_*?\.:]+)?
 /*
-- 
2.30.2