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-rw-r--r--tools/lib/lockdep/tests/ABBCCDDA.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/tools/lib/lockdep/tests/ABBCCDDA.c b/tools/lib/lockdep/tests/ABBCCDDA.c
new file mode 100644
index 000000000..3570bf7b3
--- /dev/null
+++ b/tools/lib/lockdep/tests/ABBCCDDA.c
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <liblockdep/mutex.h>
+#include "common.h"
+
+void main(void)
+{
+ pthread_mutex_t a, b, c, d;
+
+ pthread_mutex_init(&a, NULL);
+ pthread_mutex_init(&b, NULL);
+ pthread_mutex_init(&c, NULL);
+ pthread_mutex_init(&d, NULL);
+
+ LOCK_UNLOCK_2(a, b);
+ LOCK_UNLOCK_2(b, c);
+ LOCK_UNLOCK_2(c, d);
+ LOCK_UNLOCK_2(d, a);
+
+ pthread_mutex_destroy(&d);
+ pthread_mutex_destroy(&c);
+ pthread_mutex_destroy(&b);
+ pthread_mutex_destroy(&a);
+}