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[Qemu-devel] [PATCH v9 06/27] qapi: Test failure in middle of array pars
From: |
Eric Blake |
Subject: |
[Qemu-devel] [PATCH v9 06/27] qapi: Test failure in middle of array parse |
Date: |
Tue, 3 Nov 2015 23:20:28 -0700 |
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.
Signed-off-by: Eric Blake <address@hidden>
---
v9: move earlier in series (was 15/17)
v8: no change
v7: no change
v6: rebase onto earlier gen_err_check() and testsuite improvements
---
scripts/qapi-visit.py | 4 ++++
tests/test-qmp-input-visitor.c | 10 ++++++++++
2 files changed, 14 insertions(+)
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 d63c470..fc30bd1 100644
--- a/tests/test-qmp-input-visitor.c
+++ b/tests/test-qmp-input-visitor.c
@@ -701,6 +701,7 @@ static void test_visitor_in_errors(TestInputVisitorData
*data,
{
TestStruct *p = NULL;
Visitor *v;
+ strList *q = NULL;
v = visitor_input_test_init(data, "{ 'integer': false, 'boolean': 'foo',
'string': -42 }");
@@ -712,6 +713,15 @@ 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' ]");
+ /* FIXME - a failed parse should not leave a partially-allocated
+ * array for us to clean up; this could cause callers to leak
+ * memory. */
+ visit_type_strList(v, &q, NULL, &data->err);
+ assert(q);
+ assert(data->err);
+ qapi_free_strList(q);
}
int main(int argc, char **argv)
--
2.4.3
- [Qemu-devel] [PATCH v9 00/27] alternate layout (post-introspection cleanups, subset C), Eric Blake, 2015/11/04
- [Qemu-devel] [PATCH v9 07/27] qapi: More tests of input arrays, Eric Blake, 2015/11/04
- [Qemu-devel] [PATCH v9 05/27] qapi: More tests of alternate output, Eric Blake, 2015/11/04
- [Qemu-devel] [PATCH v9 06/27] qapi: Test failure in middle of array parse,
Eric Blake <=
- [Qemu-devel] [PATCH v9 02/27] qapi: Strengthen test of TestStructList, Eric Blake, 2015/11/04
- [Qemu-devel] [PATCH v9 10/27] qapi: Track simple union tag in object.local_members, Eric Blake, 2015/11/04
- [Qemu-devel] [PATCH v9 09/27] qapi-introspect: Document lack of sorting, Eric Blake, 2015/11/04
- [Qemu-devel] [PATCH v9 14/27] qapi: Fix up commit 7618b91's clash sanity checking change, Eric Blake, 2015/11/04
- [Qemu-devel] [PATCH v9 13/27] qapi: Drop obsolete tag value collision assertions, Eric Blake, 2015/11/04