Do not segfault if the event cannot be found for some reason and
tep_find_event_by_record() returns NULL.
With this patch:
kworker/u8:0-7 [003] 1.245773: sched_stat_runtime: comm=kworker/u8:...
[UNKNOWN EVENT][UNKNOWN EVENT] (NULL): [UNKNOWN EVENT]
kworker/u8:0-7 [003] 1.245776: sched_switch: kworker/u8:0:7 [120] W...
Suggested-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@xxxxxxxx>
---
tracecmd/trace-read.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/tracecmd/trace-read.c b/tracecmd/trace-read.c
index 6f43c1d..df40b75 100644
--- a/tracecmd/trace-read.c
+++ b/tracecmd/trace-read.c
@@ -142,12 +142,13 @@ static struct trace_hash wakeup_hash;
static void print_event_name(struct trace_seq *s, struct tep_event *event)
{
static const char *spaces = " "; /* 20 spaces */
+ const char *name = event ? event->name : "(NULL)";
int len;
- trace_seq_printf(s, " %s: ", event->name);
+ trace_seq_printf(s, " %s: ", name);
/* Space out the event names evenly. */
- len = strlen(event->name);
+ len = strlen(name);
if (len < 20)
trace_seq_printf(s, "%.*s", 20 - len, spaces);
}
--
2.20.1
|