linux-kernel - [PATCH 02/13] tools lib traceevent: Get rid of die() from pretty

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Message-Id: <1347070032-4161-3-git-send-email-acme@infradead.org>
Date:	Fri,  7 Sep 2012 23:07:01 -0300
From:	Arnaldo Carvalho de Melo <acme@...radead.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-kernel@...r.kernel.org, Namhyung Kim <namhyung.kim@....com>,
	Namhyung Kim <namhyung@...nel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Steven Rostedt <rostedt@...dmis.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 02/13] tools lib traceevent: Get rid of die() from pretty_print()

From: Namhyung Kim <namhyung.kim@....com>

There are three cases that call die() in the pretty_print.

 1. insufficient number of argument: cannot proceed anymore.
 2. too long format conversion specifier: truncate and proceed.
 3. bad size specifier in format string: skip and proceed.

For all cases, convert die to do_warning, mark the event as
EVENT_FL_FAILED and print error message at the last.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
Acked-by: Steven Rostedt <rostedt@...dmis.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Steven Rostedt <rostedt@...dmis.org>
Link: http://lkml.kernel.org/r/1346986187-5170-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/lib/traceevent/event-parse.c |   43 +++++++++++++++++++++++++++---------
 1 file changed, 32 insertions(+), 11 deletions(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index b5b4d80..6d5e759 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -3889,8 +3889,11 @@ static void pretty_print(struct trace_seq *s, void *data, int size, struct event
 				goto cont_process;
 			case '*':
 				/* The argument is the length. */
-				if (!arg)
-					die("no argument match");
+				if (!arg) {
+					do_warning("no argument match");
+					event->flags |= EVENT_FL_FAILED;
+					goto out_failed;
+				}
 				len_arg = eval_num_arg(data, size, event, arg);
 				len_as_arg = 1;
 				arg = arg->next;
@@ -3923,15 +3926,21 @@ static void pretty_print(struct trace_seq *s, void *data, int size, struct event
 			case 'x':
 			case 'X':
 			case 'u':
-				if (!arg)
-					die("no argument match");
+				if (!arg) {
+					do_warning("no argument match");
+					event->flags |= EVENT_FL_FAILED;
+					goto out_failed;
+				}
 
 				len = ((unsigned long)ptr + 1) -
 					(unsigned long)saveptr;
 
 				/* should never happen */
-				if (len > 31)
-					die("bad format!");
+				if (len > 31) {
+					do_warning("bad format!");
+					event->flags |= EVENT_FL_FAILED;
+					len = 31;
+				}
 
 				memcpy(format, saveptr, len);
 				format[len] = 0;
@@ -3995,19 +4004,26 @@ static void pretty_print(struct trace_seq *s, void *data, int size, struct event
 						trace_seq_printf(s, format, (long long)val);
 					break;
 				default:
-					die("bad count (%d)", ls);
+					do_warning("bad count (%d)", ls);
+					event->flags |= EVENT_FL_FAILED;
 				}
 				break;
 			case 's':
-				if (!arg)
-					die("no matching argument");
+				if (!arg) {
+					do_warning("no matching argument");
+					event->flags |= EVENT_FL_FAILED;
+					goto out_failed;
+				}
 
 				len = ((unsigned long)ptr + 1) -
 					(unsigned long)saveptr;
 
 				/* should never happen */
-				if (len > 31)
-					die("bad format!");
+				if (len > 31) {
+					do_warning("bad format!");
+					event->flags |= EVENT_FL_FAILED;
+					len = 31;
+				}
 
 				memcpy(format, saveptr, len);
 				format[len] = 0;
@@ -4025,6 +4041,11 @@ static void pretty_print(struct trace_seq *s, void *data, int size, struct event
 			trace_seq_putc(s, *ptr);
 	}
 
+	if (event->flags & EVENT_FL_FAILED) {
+out_failed:
+		trace_seq_printf(s, "[FAILED TO PARSE]");
+	}
+
 	if (args) {
 		free_args(args);
 		free(bprint_fmt);
-- 
1.7.9.2.358.g22243

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