Add some debugging code that ensures that when we do deadlock avoidance, we

don't lose the information about how a lock was originally acquired.


git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.4@118953 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 28 insertions, 0 deletions

diff --git a/main/utils.c b/main/utils.c
index 5190f5f64..7b6e64812 100644
--- a/main/utils.c
+++ b/main/utils.c
@@ -662,6 +662,34 @@ void ast_mark_lock_failed(void *lock_addr)
 	pthread_mutex_unlock(&lock_info->lock);
 }
 
+int ast_find_lock_info(void *lock_addr, const char **filename, int *lineno, const char **func, const char **mutex_name)
+{
+	struct thr_lock_info *lock_info;
+	int i = 0;
+
+	if (!(lock_info = ast_threadstorage_get(&thread_lock_info, sizeof(*lock_info))))
+		return -1;
+
+	pthread_mutex_lock(&lock_info->lock);
+
+	for (i = lock_info->num_locks - 1; i >= 0; i--) {
+		if (lock_info->locks[i].lock_addr == lock_addr)
+			break;
+	}
+
+	if (i == -1) {
+		/* Lock not found :( */
+		pthread_mutex_unlock(&lock_info->lock);
+		return -1;
+	}
+
+	*filename = lock_info->locks[i].file;
+	*lineno = lock_info->locks[i].line_num;
+	*func = lock_info->locks[i].func;
+	*mutex_name = lock_info->locks[i].lock_name;
+	return 0;
+}
+
 void ast_remove_lock_info(void *lock_addr)
 {
 	struct thr_lock_info *lock_info;