[Qemu-devel] [PATCH 6/6] qtest: add a fuzz test to fdc-test

[Blue Swirl]

Add a simple register fuzzing test to floppy controller tests.

Signed-off-by: Blue Swirl <blauwir...@gmail.com>
---
 tests/fdc-test.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/tests/fdc-test.c b/tests/fdc-test.c
index 22d24ac..676b215 100644
--- a/tests/fdc-test.c
+++ b/tests/fdc-test.c
@@ -185,6 +185,22 @@ static void test_media_change(void)
     assert_bit_set(dir, DSKCHG);
 }
 
+/* success if no crash or abort */
+static void fuzz_registers(void)
+{
+    unsigned int i;
+
+    for (i = 0; i < 1000; i++) {
+        uint8_t reg, val;
+
+        reg = (uint8_t)g_test_rand_int_range(0, 8);
+        val = (uint8_t)g_test_rand_int_range(0, 256);
+
+        outb(FLOPPY_BASE + reg, val);
+        inb(FLOPPY_BASE + reg);
+    }
+}
+
 int main(int argc, char **argv)
 {
     const char *arch = qtest_get_arch();
@@ -215,6 +231,7 @@ int main(int argc, char **argv)
     qtest_add_func("/fdc/cmos", test_cmos);
     qtest_add_func("/fdc/no_media_on_start", test_no_media_on_start);
     qtest_add_func("/fdc/media_change", test_media_change);
+    qtest_add_func("/fdc/fuzz-registers", fuzz_registers);
 
     ret = g_test_run();
 
-- 
1.7.2.5