linux-kernel - [PATCH v3 3/4] perf tools: Adds the tracepoint name parsing support

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Date:	Mon, 28 Sep 2015 03:52:15 +0000
From:	He Kuang <hekuang@...wei.com>
To:	<a.p.zijlstra@...llo.nl>, <mingo@...hat.com>, <acme@...nel.org>,
	<jolsa@...nel.org>, <kan.liang@...el.com>,
	<adrian.hunter@...el.com>
CC:	<wangnan0@...wei.com>, <pi3orama@....com>, <hekuang@...wei.com>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH v3 3/4] perf tools: Adds the tracepoint name parsing support

Adds rules for parsing tracepoint names. Change rules of tracepoint
which derives of PE_NAMEs into tracepoint names directly, so adding
more rules based on tracepoint names will be easier.

Signed-off-by: He Kuang <hekuang@...wei.com>
---

Changes v2-v3:
   - Change __event_legacy_tracepoint label in bison file to tracepoint_name
   - Fix formats error.
   
---
 tools/perf/util/parse-events.y | 37 +++++++++++++++++++++++--------------
 1 file changed, 23 insertions(+), 14 deletions(-)

diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 8bcc458..1c598c2 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -67,6 +67,7 @@ static inc_group_count(struct list_head *list,
 %type <head> event_legacy_cache
 %type <head> event_legacy_mem
 %type <head> event_legacy_tracepoint
+%type <tracepoint_name> tracepoint_name
 %type <head> event_legacy_numeric
 %type <head> event_legacy_raw
 %type <head> event_def
@@ -84,6 +85,10 @@ static inc_group_count(struct list_head *list,
 	u64 num;
 	struct list_head *head;
 	struct parse_events_term *term;
+	struct tracepoint_name {
+		char *sys;
+		char *event;
+	} tracepoint_name;
 }
 %%
 
@@ -368,36 +373,40 @@ PE_PREFIX_MEM PE_VALUE sep_dc
 }
 
 event_legacy_tracepoint:
-PE_NAME '-' PE_NAME ':' PE_NAME
+tracepoint_name
 {
 	struct parse_events_evlist *data = _data;
 	struct parse_events_error *error = data->error;
 	struct list_head *list;
-	char sys_name[128];
-	snprintf(&sys_name, 128, "%s-%s", $1, $3);
 
 	ALLOC_LIST(list);
-	if (parse_events_add_tracepoint(list, &data->idx, &sys_name, $5, error)) {
+	if (parse_events_add_tracepoint(list, &data->idx, $1.sys, $1.event,
+					error)) {
 		if (error)
 			error->idx = @1.first_column;
 		return -1;
 	}
 	$$ = list;
 }
+
+tracepoint_name:
+PE_NAME '-' PE_NAME ':' PE_NAME
+{
+	char sys_name[128];
+	struct tracepoint_name tracepoint;
+
+	snprintf(&sys_name, 128, "%s-%s", $1, $3);
+	tracepoint.sys = &sys_name;
+	tracepoint.event = $5;
+
+	$$ = tracepoint;
+}
 |
 PE_NAME ':' PE_NAME
 {
-	struct parse_events_evlist *data = _data;
-	struct parse_events_error *error = data->error;
-	struct list_head *list;
+	struct tracepoint_name tracepoint = {$1, $3};
 
-	ALLOC_LIST(list);
-	if (parse_events_add_tracepoint(list, &data->idx, $1, $3, error)) {
-		if (error)
-			error->idx = @1.first_column;
-		return -1;
-	}
-	$$ = list;
+	$$ = tracepoint;
 }
 
 event_legacy_numeric:
-- 
1.8.5.2

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