[Qemu-devel] [PATCH qom-next] qom: make object cast assert if NULL object is passed as argument

[Igor Mammedov]

without assert it will crash at following point:
   OBJECT_CHECK(type, obj, name) \
    ((type *)object_dynamic_cast_assert(OBJECT(obj), (name)))
      =>  object_dynamic_cast(obj, typename)
        =>  object_is_type(obj, target_type)
          =>  type_is_ancestor(obj->class->type, target_type);
                                 ^^^
so abort earlier and print nice message instead of SIGSEGV

Signed-off-by: Igor Mammedov <imamm...@redhat.com>
---
 qom/object.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/qom/object.c b/qom/object.c
index 00bb3b0..444e2fc 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -481,6 +481,8 @@ Object *object_dynamic_cast_assert(Object *obj, const char 
*typename)
 {
     Object *inst;
 
+    g_assert(obj != NULL);
+
     inst = object_dynamic_cast(obj, typename);
 
     if (!inst) {
-- 
1.7.7.6