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From: Tzvetomir Stoyanov <tstoyanov@vmware.com>
To: rostedt@goodmis.org
Cc: linux-trace-devel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/8] tools/lib/traceevent: Add counter to track parsing failures
Date: Tue, 26 Mar 2019 17:43:22 +0200
Message-ID: <20190326154328.28718-3-tstoyanov@vmware.com> (raw)
In-Reply-To: <20190326154328.28718-1-tstoyanov@vmware.com>

This patch adds a parsing failures counter to struct tep_handle. The counter can
be used to track failures on parsing event format files. It is updated
automatically by tep_parse_event(), when failure is detected. The patch also
adds two new APIs for accessing the counter:
 tep_get_parsing_failures() - returns the current value of the counter.
 tep_clear_parsing_failures() - clears the counter.

Signed-off-by: Tzvetomir Stoyanov <tstoyanov@vmware.com>
---
 tools/lib/traceevent/event-parse-api.c   | 27 ++++++++++++++++++++++++
 tools/lib/traceevent/event-parse-local.h |  2 ++
 tools/lib/traceevent/event-parse.c       |  8 ++++++-
 tools/lib/traceevent/event-parse.h       |  2 ++
 4 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/tools/lib/traceevent/event-parse-api.c b/tools/lib/traceevent/event-parse-api.c
index 46670bb87051..1fe284b1fac8 100644
--- a/tools/lib/traceevent/event-parse-api.c
+++ b/tools/lib/traceevent/event-parse-api.c
@@ -371,3 +371,30 @@ void tep_set_test_filters(struct tep_handle *tep, int test_filters)
 	if (tep)
 		tep->test_filters = test_filters;
 }
+
+/**
+ * tep_get_parsing_failures - get the count of parsing failures
+ * @tep: a handle to a tep_handle
+ *
+ * Every time when tep_parse_event() fails to parse an event format file,
+ * a parsing failure is registered. This returns the parsing failures count.
+ */
+int tep_get_parsing_failures(struct tep_handle *tep)
+{
+	if (tep)
+		return tep->parsing_failures;
+	return 0;
+}
+
+/**
+ * tep_clear_parsing_failures - clear parsing failures count
+ * @tep: a handle to a tep_handle
+ *
+ * Every time when tep_parse_event() fails to parse an event format file,
+ * a parsing failure is registered. This clears the parsing failures counter.
+ */
+void tep_clear_parsing_failures(struct tep_handle *tep)
+{
+	if (tep)
+		tep->parsing_failures = 0;
+}
diff --git a/tools/lib/traceevent/event-parse-local.h b/tools/lib/traceevent/event-parse-local.h
index 35833ee32d6c..c5c8eb4c4ab7 100644
--- a/tools/lib/traceevent/event-parse-local.h
+++ b/tools/lib/traceevent/event-parse-local.h
@@ -83,6 +83,8 @@ struct tep_handle {
 	struct event_handler *handlers;
 	struct tep_function_handler *func_handlers;
 
+	int parsing_failures;
+
 	/* cache */
 	struct tep_event *last_event;
 
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index f309b6d7e08a..4144c4e20e4e 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -6230,7 +6230,13 @@ enum tep_errno tep_parse_event(struct tep_handle *pevent, const char *buf,
 			       unsigned long size, const char *sys)
 {
 	struct tep_event *event = NULL;
-	return __parse_event(pevent, &event, buf, size, sys);
+	enum tep_errno ret;
+
+	ret = __parse_event(pevent, &event, buf, size, sys);
+	if (ret != TEP_ERRNO__SUCCESS)
+		pevent->parsing_failures++;
+
+	return ret;
 }
 
 int get_field_val(struct trace_seq *s, struct tep_format_field *field,
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
index f3b822736d87..dcf0385684b8 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -464,6 +464,8 @@ enum tep_errno tep_parse_format(struct tep_handle *pevent,
 				struct tep_event **eventp,
 				const char *buf,
 				unsigned long size, const char *sys);
+int tep_get_parsing_failures(struct tep_handle *tep);
+void tep_clear_parsing_failures(struct tep_handle *tep);
 
 void *tep_get_field_raw(struct trace_seq *s, struct tep_event *event,
 			const char *name, struct tep_record *record,
-- 
2.20.1


  parent reply index

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-26 15:43 [PATCH 0/8] Cleanup traceevent API and make it more consistent Tzvetomir Stoyanov
2019-03-26 15:43 ` [PATCH 1/8] tools/perf,tools/lib/traceevent: Make traceevent APIs " Tzvetomir Stoyanov
2019-03-26 19:43   ` Steven Rostedt
2019-03-26 15:43 ` Tzvetomir Stoyanov [this message]
2019-03-26 19:48   ` [PATCH 2/8] tools/lib/traceevent: Add counter to track parsing failures Steven Rostedt
2019-03-26 15:43 ` [PATCH 3/8] tools/lib/traceevent: Remove tep filter trivial APIs Tzvetomir Stoyanov
2019-03-26 19:50   ` Steven Rostedt
2019-03-26 15:43 ` [PATCH 4/8] tools/lib/traceevent: rename input arguments of libtraceevent APIs from pevent to tep Tzvetomir Stoyanov
2019-03-26 19:57   ` Steven Rostedt
2019-03-26 19:58     ` Steven Rostedt
2019-03-26 15:43 ` [PATCH 5/8] tools/perf,tools/lib/traceevent: rename "pevent" member of struct tep_event to "tep" Tzvetomir Stoyanov
2019-03-26 15:43 ` [PATCH 6/8] tools/perf,tools/lib/traceevent: rename "pevent" member of struct tep_event_filter " Tzvetomir Stoyanov
2019-03-26 15:43 ` [PATCH 7/8] tools/lib/traceevent: rename input arguments and local variables of libtraceevent from pevent to tep Tzvetomir Stoyanov
2019-03-26 15:43 ` [PATCH 8/8] tools/lib/traceevent: remove call to exit() from tep_filter_add_filter_str() Tzvetomir Stoyanov
2019-03-26 20:02   ` Steven Rostedt
2019-03-27 14:19 [PATCH v2 0/5] Cleanup traceevent API and make it more consistent Tzvetomir Stoyanov
2019-03-27 14:19 ` [PATCH v2 1/5] tools/perf,tools/lib/traceevent: Make traceevent APIs " Tzvetomir Stoyanov
2019-03-27 14:41   ` Steven Rostedt
2019-03-27 14:19 ` [PATCH v2 2/5] tools/lib/traceevent: Rename input arguments of libtraceevent APIs from pevent to tep Tzvetomir Stoyanov
2019-03-27 15:06   ` Steven Rostedt
2019-03-27 14:19 ` [PATCH v2 3/5] tools/perf,tools/lib/traceevent: Rename "pevent" member of struct tep_event to "tep" Tzvetomir Stoyanov
2019-03-27 14:19 ` [PATCH v2 4/5] tools/perf,tools/lib/traceevent: Rename "pevent" member of struct tep_event_filter " Tzvetomir Stoyanov
2019-03-27 14:19 ` [PATCH v2 5/5] tools/lib/traceevent: Rename input arguments and local variables of libtraceevent from pevent to tep Tzvetomir Stoyanov
2019-04-01 16:43 [PATCH 00/15] tools/lib/traceevent: Continuing on the path to a stand alone library Steven Rostedt
2019-04-01 16:43 ` [PATCH 01/15] tools lib traceevent: Handle trace_printk() "%px" Steven Rostedt
2019-04-05 11:41   ` [tip:perf/core] " tip-bot for Steven Rostedt (VMware)
2019-04-01 16:43 ` [PATCH 02/15] tools/lib/traceevent: Add mono clocks to be parsed in seconds Steven Rostedt
2019-04-05 11:42   ` [tip:perf/core] tools lib traceevent: " tip-bot for Steven Rostedt (VMware)
2019-04-01 16:43 ` [PATCH 03/15] tools lib traceevent: Implement a new API, tep_list_events_copy() Steven Rostedt
2019-04-05 11:42   ` [tip:perf/core] " tip-bot for Tzvetomir Stoyanov
2019-04-01 16:43 ` [PATCH 04/15] tools/lib/traceevent: Add more debugging to see various internal ring buffer entries Steven Rostedt
2019-04-05 11:43   ` [tip:perf/core] tools lib traceevent: " tip-bot for Steven Rostedt (Red Hat)
2019-04-01 16:43 ` [PATCH 05/15] tools/lib/traceevent: Change description of few APIs Steven Rostedt
2019-04-05 11:44   ` [tip:perf/core] tools lib traceevent: " tip-bot for Tzvetomir Stoyanov
2019-04-01 16:43 ` [PATCH 06/15] tools/lib/traceevent: Coding style fixes Steven Rostedt
2019-04-05 11:44   ` [tip:perf/core] tools lib traceevent: " tip-bot for Tzvetomir Stoyanov
2019-04-01 16:43 ` [PATCH 07/15] tools/lib/traceevent: Implement new traceevent APIs for accessing struct tep_handler fields Steven Rostedt
2019-04-05 11:45   ` [tip:perf/core] tools lib traceevent: " tip-bot for Tzvetomir Stoyanov
2019-04-01 16:43 ` [PATCH 08/15] tools/lib/traceevent: Removed unneeded !! and return parenthesis Steven Rostedt
2019-04-05 11:46   ` [tip:perf/core] tools lib traceevent: " tip-bot for Steven Rostedt (VMware)
2019-04-01 16:43 ` [PATCH 09/15] tools/lib/traceevent: Remove tep filter trivial APIs Steven Rostedt
2019-04-05 11:47   ` [tip:perf/core] tools lib traceevent: " tip-bot for Tzvetomir Stoyanov
2019-04-01 16:43 ` [PATCH 10/15] tools/lib/traceevent: Remove call to exit() from tep_filter_add_filter_str() Steven Rostedt
2019-04-05 11:47   ` [tip:perf/core] tools lib traceevent: " tip-bot for Tzvetomir Stoyanov
2019-04-01 16:43 ` [PATCH 11/15] tools/perf,tools/lib/traceevent: Make traceevent APIs more consistent Steven Rostedt
2019-04-05 11:48   ` [tip:perf/core] tools tools, tools lib traceevent: " tip-bot for Tzvetomir Stoyanov
2019-04-01 16:43 ` [PATCH 12/15] tools/lib/traceevent: Rename input arguments of libtraceevent APIs from pevent to tep Steven Rostedt
2019-04-05 11:49   ` [tip:perf/core] tools lib traceevent: " tip-bot for Tzvetomir Stoyanov
2019-04-01 16:43 ` [PATCH 13/15] tools/perf,tools/lib/traceevent: Rename "pevent" member of struct tep_event to "tep" Steven Rostedt
2019-04-05 11:49   ` [tip:perf/core] perf tools, tools lib traceevent: " tip-bot for Tzvetomir Stoyanov
2019-04-01 16:43 ` [PATCH 14/15] tools/perf,tools/lib/traceevent: Rename "pevent" member of struct tep_event_filter " Steven Rostedt
2019-04-05 11:50   ` [tip:perf/core] perf tools, tools lib traceevent: " tip-bot for Tzvetomir Stoyanov
2019-04-01 16:43 ` [PATCH 15/15] tools/lib/traceevent: Rename input arguments and local variables of libtraceevent from pevent to tep Steven Rostedt
2019-04-05 11:51   ` [tip:perf/core] tools lib traceevent: " tip-bot for Tzvetomir Stoyanov
2019-04-01 18:17 ` [PATCH 00/15] tools/lib/traceevent: Continuing on the path to a stand alone library Arnaldo Carvalho de Melo

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