Add a test that proves (at least when run under valgrind) that
we are correctly handling allocated memory even when a visit
is aborted in the middle for whatever other reason.
See commit f24582d "qapi: fix double free in
qmp_output_visitor_cleanup()" for a fix that was lacking
testsuite exposure prior to this patch.
Signed-off-by: Eric Blake <ebl...@redhat.com>
---
v2: tweak partial alternate visit
---
tests/test-qobject-output-visitor.c | 42 ++++++++++++++++++++++++++++++++++++-
1 file changed, 41 insertions(+), 1 deletion(-)
diff --git a/tests/test-qobject-output-visitor.c
b/tests/test-qobject-output-visitor.c
index 749c54065f..ce2fb8f368 100644
--- a/tests/test-qobject-output-visitor.c
+++ b/tests/test-qobject-output-visitor.c
@@ -1,7 +1,7 @@
/*
* QObject Output Visitor unit-tests.
*
- * Copyright (C) 2011-2016 Red Hat Inc.
+ * Copyright (C) 2011-2017 Red Hat Inc.
*
* Authors:
* Luiz Capitulino <lcapitul...@redhat.com>
@@ -251,6 +251,44 @@ static void
test_visitor_out_struct_errors(TestOutputVisitorData *data,
}
+static void test_visitor_out_partial_visit(TestOutputVisitorData *data,
+ const void *unused)
+{
+ /* Various checks that a mid-visit abort doesn't leak or double-free. */
+ const char *str = "hi";
+ Error *err = NULL;
+ UserDefAlternate uda = {
+ .type = QTYPE_QDICT,
+ .u.udfu = { .integer = 1,
+ .string = (char *) "bye",
+ .enum1 = -1 } /* intentionally bad */
+ };
+ UserDefAlternate *obj = &uda;
+
+ /* Abort within a nested object with no data members */
+ visit_start_struct(data->ov, NULL, NULL, 0, &error_abort);
+ visit_start_struct(data->ov, "nested", NULL, 0, &error_abort);
+ visitor_reset(data);
+
+ /* Abort in the middle of a list of strings */
+ visit_start_list(data->ov, "list", NULL, 0, &error_abort);
+ visit_type_str(data->ov, NULL, (char **)&str, &error_abort);
+ visit_type_str(data->ov, NULL, (char **)&str, &error_abort);
+ visitor_reset(data);
+
+ /*
+ * Abort in the middle of an alternate, due to bad "enum1"
+ * discriminator value. Since alternates don't support virtual
+ * visits, we perform a real one, relying on our knowledge that
+ * visit_type_UserDefAlternate() calls visit_start_alternate()
+ * under the hood.
+ */
+ visit_type_UserDefAlternate(data->ov, NULL, &obj, &err);
+ error_free_or_abort(&err);
+ visitor_reset(data);
+}
+
+
static void test_visitor_out_list(TestOutputVisitorData *data,
const void *unused)
{
@@ -815,6 +853,8 @@ int main(int argc, char **argv)
&out_visitor_data, test_visitor_out_struct_nested);
output_visitor_test_add("/visitor/output/struct-errors",
&out_visitor_data, test_visitor_out_struct_errors);
+ output_visitor_test_add("/visitor/output/partial-visit",
+ &out_visitor_data, test_visitor_out_partial_visit);
output_visitor_test_add("/visitor/output/list",
&out_visitor_data, test_visitor_out_list);
output_visitor_test_add("/visitor/output/any",
--
2.13.3
