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authorEric Blake <eblake@redhat.com>2015-11-05 23:35:33 -0700
committerMarkus Armbruster <armbru@redhat.com>2015-11-10 08:09:14 +0100
commitdd5ee2c2d3e3a17647ddd9bfa97935b8cb5dfa40 (patch)
tree47a7ce33ddab68e87a50e6b4496ae1a6db0beeec
parent12fafd7cedad51854c468ea0496a6542b3222b29 (diff)
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qapi: Test failure in middle of array parse
Our generated list visitors have the same problem as has been mentioned elsewhere (see commit 2f52e20): they allocate data even on failure. An upcoming patch will correct things to provide saner guarantees, but first we need to expose the behavior in the testsuite to ensure we aren't introducing any memory usage bugs. There are more test cases throughout the test-qmp-input-* tests that already deal with partial allocation; a later commit will clean up all visit_type_FOO(), without marking all of the tests with FIXME at this time. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1446791754-23823-10-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
-rw-r--r--scripts/qapi-visit.py4
-rw-r--r--tests/test-qmp-input-visitor.c10
2 files changed, 13 insertions, 1 deletions
diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py
index f40c3c7..3ef5c16 100644
--- a/scripts/qapi-visit.py
+++ b/scripts/qapi-visit.py
@@ -138,6 +138,10 @@ void visit_type_%(c_name)s(Visitor *v, %(c_name)s **obj, const char *name, Error
def gen_visit_list(name, element_type):
+ # FIXME: if *obj is NULL on entry, and the first visit_next_list()
+ # assigns to *obj, while a later one fails, we should clean up *obj
+ # rather than leaving it non-NULL. As currently written, the caller must
+ # call qapi_free_FOOList() to avoid a memory leak of the partial FOOList.
return mcgen('''
void visit_type_%(c_name)s(Visitor *v, %(c_name)s **obj, const char *name, Error **errp)
diff --git a/tests/test-qmp-input-visitor.c b/tests/test-qmp-input-visitor.c
index ef5284d..aa02eec 100644
--- a/tests/test-qmp-input-visitor.c
+++ b/tests/test-qmp-input-visitor.c
@@ -698,8 +698,10 @@ static void test_visitor_in_errors(TestInputVisitorData *data,
TestStruct *p = NULL;
Error *err = NULL;
Visitor *v;
+ strList *q = NULL;
- v = visitor_input_test_init(data, "{ 'integer': false, 'boolean': 'foo', 'string': -42 }");
+ v = visitor_input_test_init(data, "{ 'integer': false, 'boolean': 'foo', "
+ "'string': -42 }");
visit_type_TestStruct(v, &p, NULL, &err);
error_free_or_abort(&err);
@@ -709,6 +711,12 @@ static void test_visitor_in_errors(TestInputVisitorData *data,
g_free(p->string);
g_free(p);
+
+ v = visitor_input_test_init(data, "[ '1', '2', false, '3' ]");
+ visit_type_strList(v, &q, NULL, &err);
+ error_free_or_abort(&err);
+ assert(q);
+ qapi_free_strList(q);
}
int main(int argc, char **argv)