[Qemu-devel] [PATCH 1/3] libqtest: Ignore QMP events when parsing the response for HMP commands

[Thomas Huth <thuth@redhat.com>]

When running certain HMP commands (like "device_del") via QMP, we
can sometimes get a QMP event in the response first, so that the
"g_assert(ret)" statement in qtest_hmp() triggers and the test
fails. So ignore such QMP events when looking for the real
return value from QMP.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 tests/libqtest.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tests/libqtest.c b/tests/libqtest.c
index a5c3d2b..c9b2d76 100644
--- a/tests/libqtest.c
+++ b/tests/libqtest.c
@@ -580,6 +580,12 @@ char *qtest_hmpv(QTestState *s, const char *fmt, va_list ap)
                      " 'arguments': {'command-line': %s}}",
                      cmd);
     ret = g_strdup(qdict_get_try_str(resp, "return"));
+    while (ret == NULL && qdict_get_try_str(resp, "event")) {
+        /* Ignore asynchronous QMP events */
+        QDECREF(resp);
+        resp = qtest_qmp_receive(s);
+        ret = g_strdup(qdict_get_try_str(resp, "return"));
+    }
     g_assert(ret);
     QDECREF(resp);
     g_free(cmd);
-- 
1.8.3.1