[Qemu-devel] [PATCH] 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 <address@hidden>
---
There's a lot of output like:
GTESTER check-qtest-i386
FLOPPY ERROR: fdctrl_read_data: controller not ready for reading
FLOPPY ERROR: fdctrl_read_data: controller not ready for reading
FLOPPY ERROR: fdctrl_unimplemented: unimplemented command 0x1f
FLOPPY ERROR: fdctrl_unimplemented: unimplemented command 0xa8
FLOPPY ERROR: fdctrl_read_data: controller not ready for reading
FLOPPY ERROR: fdctrl_read_data: controller not ready for reading
FLOPPY ERROR: fdctrl_read_data: controller not ready for reading
FLOPPY ERROR: fdctrl_unimplemented: unimplemented command 0x37
FLOPPY ERROR: fdctrl_read_data: controller not ready for reading
FLOPPY ERROR: fdctrl_read_data: controller not ready for reading
FLOPPY ERROR: fdctrl_read_data: controller not ready for reading
FLOPPY ERROR: fdctrl_read_data: controller not ready for reading
FLOPPY ERROR: fdctrl_read_data: controller not ready for reading
FLOPPY ERROR: fdctrl_read_data: controller not ready for reading
FLOPPY ERROR: fdctrl_unimplemented: unimplemented command 0x93
FLOPPY ERROR: fdctrl_unimplemented: unimplemented command 0xe4
FLOPPY ERROR: fdctrl_unimplemented: unimplemented command 0xc1
FLOPPY ERROR: fdctrl_unimplemented: unimplemented command 0x92

Maybe they should be fixed first.

---
 tests/fdc-test.c |   17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/tests/fdc-test.c b/tests/fdc-test.c
index 5b5dd74..5a22a31 100644
--- a/tests/fdc-test.c
+++ b/tests/fdc-test.c
@@ -154,6 +154,22 @@ static void test_media_change(void)
     assert_bit_clear(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();
@@ -184,6 +200,7 @@ int main(int argc, char **argv)
     qtest_start(cmdline);
     qtest_irq_intercept_in(global_qtest, "ioapic");
     qtest_add_func("/fdc/media_change", test_media_change);
+    qtest_add_func("/fdc/fuzz-registers", fuzz_registers);

     ret = g_test_run();

-- 
1.7.10

0001-qtest-add-a-fuzz-test-to-fdc-test.patch
Description: Text Data