[Dle-develop] [tip:perf/urgent] perf probe: Check the result of e_snprintf()

[tip-bot f. M. H. <mhi...@re...>]

Commit-ID:  7e990a51264cb0c1400155ba72d56f5158ccf919
Gitweb:     http://git.kernel.org/tip/7e990a51264cb0c1400155ba72d56f5158ccf919
Author:     Masami Hiramatsu <mhi...@re...>
AuthorDate: Tue, 15 Dec 2009 10:31:21 -0500
Committer:  Ingo Molnar <mi...@el...>
CommitDate: Tue, 15 Dec 2009 20:22:00 +0100

perf probe: Check the result of e_snprintf()

Fix show_perf_probe_event() to check the result of e_snprintf().

Signed-off-by: Masami Hiramatsu <mhi...@re...>
Cc: Paul Mackerras <pa...@sa...>
Cc: Arnaldo Carvalho de Melo <ac...@re...>
Cc: Steven Rostedt <ro...@go...>
Cc: Jim Keniston <jke...@us...>
Cc: Ananth N Mavinakayanahalli <an...@in...>
Cc: Christoph Hellwig <hc...@in...>
Cc: Frank Ch. Eigler <fc...@re...>
Cc: Jason Baron <jb...@re...>
Cc: K.Prasad <pr...@li...>
Cc: Peter Zijlstra <pe...@in...>
Cc: Srikar Dronamraju <sr...@li...>
Cc: systemtap <sys...@so...>
Cc: DLE <dle...@li...>
Cc: Frederic Weisbecker <fwe...@gm...>
LKML-Reference: <200...@dh...>
Signed-off-by: Ingo Molnar <mi...@el...>
---
 tools/perf/util/probe-event.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index add379c..1653a62 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -385,10 +385,12 @@ static void clear_probe_point(struct probe_point *pp)
 static void show_perf_probe_event(const char *group, const char *event,
 				  const char *place, struct probe_point *pp)
 {
-	int i;
+	int i, ret;
 	char buf[128];
 
-	e_snprintf(buf, 128, "%s:%s", group, event);
+	ret = e_snprintf(buf, 128, "%s:%s", group, event);
+	if (ret < 0)
+		die("Failed to copy event: %s", strerror(-ret));
 	printf("  %-40s (on %s", buf, place);
 
 	if (pp->nr_args > 0) {