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-rw-r--r--tools/lib/lockdep/tests/WW.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/tools/lib/lockdep/tests/WW.c b/tools/lib/lockdep/tests/WW.c
new file mode 100644
index 00000000000..d44f77d7102
--- /dev/null
+++ b/tools/lib/lockdep/tests/WW.c
@@ -0,0 +1,13 @@
+#include <liblockdep/rwlock.h>
+
+void main(void)
+{
+ pthread_rwlock_t a, b;
+
+ pthread_rwlock_init(&a, NULL);
+ pthread_rwlock_init(&b, NULL);
+
+ pthread_rwlock_wrlock(&a);
+ pthread_rwlock_rdlock(&b);
+ pthread_rwlock_wrlock(&a);
+}