implement a timer_list check before we return into the select() loop

this helps us to debug timer_list corruption

2 files changed, 13 insertions, 0 deletions

diff --git a/openbsc/src/select.c b/openbsc/src/select.c
index 7f45426d0..c11f3a511 100644
--- a/openbsc/src/select.c
+++ b/openbsc/src/select.c
@@ -78,6 +78,8 @@ int bsc_select_main(int polling)
 			FD_SET(ufd->fd, &exceptset);
 	}
 
+	bsc_timer_check();
+
 	if (!polling)
 		bsc_prepare_timers();
 	rc = select(maxfd+1, &readset, &writeset, &exceptset, polling ? &no_time : bsc_nearest_timer());
diff --git a/openbsc/src/timer.c b/openbsc/src/timer.c
index a942ffd6d..6f974a2c3 100644
--- a/openbsc/src/timer.c
+++ b/openbsc/src/timer.c
@@ -172,3 +172,14 @@ restart:
 
 	return work;
 }
+
+int bsc_timer_check(void)
+{
+	struct timer_list *timer;
+	int i;
+
+	llist_for_each_entry(timer, &timer_list, entry) {
+		i++;
+	}
+	return i;
+}