动态驱动模块加载报错【rt_object_init】是否存在bug？

发布于 2023-08-02 13:40:12 浏览：389 订阅该版

1 个回答

黑海大白鲨 2023-08-03

这家伙很懒，什么也没写！

问题解决（但是需要修改object模块，不确定修改是否合理）：

```c
void rt_object_init(struct rt_object         *object,
                    enum rt_object_class_type type,
                    const char               *name)
{
    rt_base_t level;
    struct rt_list_node *node = RT_NULL;
    struct rt_object_information *information;
#ifdef RT_USING_MODULE
    struct rt_dlmodule *module = dlmodule_self();
#endif /* RT_USING_MODULE */

/* get object information */
    information = rt_object_get_information(type);
    RT_ASSERT(information != RT_NULL);

/* check object type to avoid re-initialization */

/* enter critical */
    rt_enter_critical();
    /* try to find object */
    for (node  = information->object_list.next;
            node != &(information->object_list);
            node  = node->next)
    {
        struct rt_object *obj;

obj = rt_list_entry(node, struct rt_object, list);
        if (obj) /* skip warning when disable debug */
        {
            RT_ASSERT(obj != object);
        }
    }
    /* leave critical */
    rt_exit_critical();

/* initialize object's parameters */
    /* set object type to static */
    object->type = type | RT_Object_Class_Static;
    /* copy name */
    rt_strncpy(object->name, name, RT_NAME_MAX);

RT_OBJECT_HOOK_CALL(rt_object_attach_hook, (object));

/* lock interrupt */
    level = rt_hw_interrupt_disable();

#ifdef RT_USING_MODULE
    if (module)
    {
        rt_list_insert_after(&(module->object_list), &(object->list));
        object->module_id = (void *)module;
    }
    else
#endif /* RT_USING_MODULE */
    {
        /* insert object into information object list */
        rt_list_insert_after(&(information->object_list), &(object->list));
    }

/* unlock interrupt */
    rt_hw_interrupt_enable(level);
}
```
报错问题产生原因：由于使用动态加载模式，在动态加载时，会进入

```c
    if (module)
    {
        rt_list_insert_after(&(module->object_list), &(object->list));
        object->module_id = (void *)module;
    }
```
代码分支中去，但是此时module结构体中没有object type信息，所以会在destory module时报错
`[E/DLMD] Unsupported oject type in module.`
驱动未找到产生原因：同上，由于使用动态加载模式，在动态加载时，会进入
```c
    if (module)
    {
        rt_list_insert_after(&(module->object_list), &(object->list));
        object->module_id = (void *)module;
    }
```
由于device注册会注册到information全局结构体中，如果只是注册到module中，那么系统不会将不会识别到
驱动注册设备。
所以针对上述两个问题修改rt_object_init函数如下（现在做测试代码）：
```c
#ifdef RT_USING_MODULE
    if (module)
    {
        if(rt_strcmp(object->name,"uart1") == 0)
        {
            rt_list_insert_after(&(information->object_list), &(object->list));
            object->module_id = (void *)module;
        }
        else
        {
            rt_list_insert_after(&(module->object_list), &(object->list));
            object->module_id = (void *)module;
        }

}
    else
#endif /* RT_USING_MODULE */
    {
        /* insert object into information object list */
        rt_list_insert_after(&(information->object_list), &(object->list));
    }
```
运行结果：注册完成之后系统可以识别到驱动设备
![屏幕截图 2023-08-03 153951.png](https://oss-club.rt-thread.org/uploads/20230803/6ba78559fe34d1022d0844737301b2b0.png)