linux-kernel - [PATCH 09/55] perf tools: Create config_term

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Date:	Fri, 19 Feb 2016 11:43:57 +0000
From:	Wang Nan <wangnan0@...wei.com>
To:	Alexei Starovoitov <ast@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Brendan Gregg <brendan.d.gregg@...il.com>
CC:	Adrian Hunter <adrian.hunter@...el.com>,
	Cody P Schafer <dev@...yps.com>,
	"David S. Miller" <davem@...emloft.net>,
	He Kuang <hekuang@...wei.com>,
	Jérémie Galarneau 
	<jeremie.galarneau@...icios.com>, Jiri Olsa <jolsa@...nel.org>,
	Kirill Smelkov <kirr@...edi.com>,
	Li Zefan <lizefan@...wei.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>, <pi3orama@....com>,
	Wang Nan <wangnan0@...wei.com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 09/55] perf tools: Create config_term_names array

config_term_names is introduced for furture commits which can retrive
config name through config term.

Utilize this array for parse_events_formats_error_string() so the
missing '{,no-}inherit' terms are added.

Signed-off-by: Wang Nan <wangnan0@...wei.com>
Cc: He Kuang <hekuang@...wei.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Zefan Li <lizefan@...wei.com>
Cc: pi3orama@....com
---
 tools/perf/util/parse-events.c | 51 +++++++++++++++++++++++++++++++++++++++---
 tools/perf/util/parse-events.h |  3 ++-
 tools/perf/util/parse-events.l |  3 +--
 3 files changed, 51 insertions(+), 6 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index ed50421..3fe0d11 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -797,6 +797,25 @@ static int check_type_val(struct parse_events_term *term,
 	return -EINVAL;
 }
 
+/*
+ * Update according to parse-events.l
+ */
+static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
+	[PARSE_EVENTS__TERM_TYPE_USER]			= "<sysfs term>",
+	[PARSE_EVENTS__TERM_TYPE_CONFIG]		= "config",
+	[PARSE_EVENTS__TERM_TYPE_CONFIG1]		= "config1",
+	[PARSE_EVENTS__TERM_TYPE_CONFIG2]		= "config2",
+	[PARSE_EVENTS__TERM_TYPE_NAME]			= "name",
+	[PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]		= "period",
+	[PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]		= "freq",
+	[PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]	= "branch_type",
+	[PARSE_EVENTS__TERM_TYPE_TIME]			= "time",
+	[PARSE_EVENTS__TERM_TYPE_CALLGRAPH]		= "call-graph",
+	[PARSE_EVENTS__TERM_TYPE_STACKSIZE]		= "stack-size",
+	[PARSE_EVENTS__TERM_TYPE_NOINHERIT]		= "no-inherit",
+	[PARSE_EVENTS__TERM_TYPE_INHERIT]		= "inherit",
+};
+
 typedef int config_term_func_t(struct perf_event_attr *attr,
 			       struct parse_events_term *term,
 			       struct parse_events_error *err);
@@ -2149,6 +2168,31 @@ void parse_events_evlist_error(struct parse_events_evlist *data,
 	WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
 }
 
+static void config_terms_list(char *buf, size_t buf_sz)
+{
+	int i;
+	bool first = true;
+
+	buf[0] = '\0';
+	for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
+		const char *name = config_term_names[i];
+
+		if (!name)
+			continue;
+		if (name[0] == '<')
+			continue;
+
+		if (strlen(buf) + strlen(name) + 2 >= buf_sz)
+			return;
+
+		if (!first)
+			strcat(buf, ",");
+		else
+			first = false;
+		strcat(buf, name);
+	}
+}
+
 /*
  * Return string contains valid config terms of an event.
  * @additional_terms: For terms such as PMU sysfs terms.
@@ -2156,10 +2200,11 @@ void parse_events_evlist_error(struct parse_events_evlist *data,
 char *parse_events_formats_error_string(char *additional_terms)
 {
 	char *str;
-	static const char *static_terms = "config,config1,config2,name,"
-					  "period,freq,branch_type,time,"
-					  "call-graph,stack-size\n";
+	/* "branch_type" is the longest name */
+	char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
+			  (sizeof("branch_type") - 1)];
 
+	config_terms_list(static_terms, sizeof(static_terms));
 	/* valid terms */
 	if (additional_terms) {
 		if (asprintf(&str, "valid terms: %s,%s",
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index ed0208f..2196db9 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -68,7 +68,8 @@ enum {
 	PARSE_EVENTS__TERM_TYPE_CALLGRAPH,
 	PARSE_EVENTS__TERM_TYPE_STACKSIZE,
 	PARSE_EVENTS__TERM_TYPE_NOINHERIT,
-	PARSE_EVENTS__TERM_TYPE_INHERIT
+	PARSE_EVENTS__TERM_TYPE_INHERIT,
+	__PARSE_EVENTS__TERM_TYPE_NR,
 };
 
 struct parse_events_term {
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index 4387728..0cc6b84 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -178,8 +178,7 @@ modifier_bp	[rwx]{1,3}
 
 <config>{
 	/*
-	 * Please update parse_events_formats_error_string any time
-	 * new static term is added.
+	 * Please update config_term_names when new static term is added.
 	 */
 config			{ return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); }
 config1			{ return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); }
-- 
1.8.3.4