tests/qtest/boot-sector: Check that the guest did not panic

The s390-ccw bios code panics if it can not boot successfully. In
this case, it does not make sense that we wait the full 600 seconds
for the boot sector test to finish and can signal the failure
immediately, thus let's check the status of the guest with the
"query-status" QMP command here, too.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20210212113141.854871-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/qtest/boot-sector.c

@@ -138,6 +138,7 @@ void boot_sector_test(QTestState *qts)
     uint8_t signature_low;
     uint8_t signature_high;
     uint16_t signature;
+    QDict *qrsp, *qret;
     int i;
 
     /* Wait at most 600 seconds (test is slow with TCI and --enable-debug) */
@@ -155,6 +156,14 @@ void boot_sector_test(QTestState *qts)
         if (signature == SIGNATURE) {
             break;
         }
+
+        /* check that guest is still in "running" state and did not panic */
+        qrsp = qtest_qmp(qts, "{ 'execute': 'query-status' }");
+        qret = qdict_get_qdict(qrsp, "return");
+        g_assert_nonnull(qret);
+        g_assert_cmpstr(qdict_get_try_str(qret, "status"), ==, "running");
+        qobject_unref(qrsp);
+
         g_usleep(TEST_DELAY);
     }