core: object: validate magic number in object header

core/object.c

@@ -2,6 +2,7 @@
 
 #include "type.h"
 
+#include <assert.h>
 #include <blue/core/class.h>
 #include <blue/core/macros.h>
 #include <blue/core/object.h>
@@ -98,6 +99,8 @@ void *b_object_get_private(const struct _b_object *object, b_type type)
 		return NULL;
 	}
 
+	assert(object->obj_magic == B_OBJECT_MAGIC);
+
 	if (b_type_id_compare(&object->obj_type->r_info->t_id, type) == 0) {
 		return (char *)object + object->obj_main_priv_offset;
 	}
@@ -117,6 +120,8 @@ void *b_object_get_protected(const struct _b_object *object, b_type type)
 		return NULL;
 	}
 
+	assert(object->obj_magic == B_OBJECT_MAGIC);
+
 	struct b_type_component *comp
 		= b_type_get_component(&object->obj_type->r_components, type);
 	if (!comp) {
@@ -132,6 +137,8 @@ void *b_object_get_interface(const struct _b_object *object, b_type type)
 		return NULL;
 	}
 
+	assert(object->obj_magic == B_OBJECT_MAGIC);
+
 	return b_class_get_interface(object->obj_type->r_class, type);
 }
 
@@ -143,6 +150,8 @@ enum b_status b_object_get_data(
 		return B_ERR_INVALID_ARGUMENT;
 	}
 
+	assert(object->obj_magic == B_OBJECT_MAGIC);
+
 	struct b_type_component *comp
 		= b_type_get_component(&object->obj_type->r_components, type);
 	if (!comp) {