Abstract: With the development of software-defined vehicles, vehicle functions have become increasingly intelligent. In the development and testing process of a certain model's intelligent function "predictive light control", a problem of no response to terminal requests for lights is encountered. After a systematic analysis, the cause of the problem is ultimately located to the inconsistent memory arrangement of the same structure data type on different platforms during cross-platform (Android and Linux) Socket communication. This article focus on the perspective of memory alignment, elaborates in detail on various solutions such as adding padding signals and increasing the length of signal groups, and proposes the final solution. It provides important guiding significance and practical engineering value for the definition of structure data types in crossplatform Socket communication.

Key words: socket communication; memory alignment; across platforms; bit stuffing

摘要： 随着软件定义汽车的发展，车辆功能也随之变得越发智能，某车型的智能功能“预见 性灯光控制”在开发测试过程中，遇到了终端请求灯光无响应问题。经过系统地分析，最终 将问题发生的原因定位到跨平台（Android 和 Linux）Socket 通讯时，同一结构体数据类型在 不同平台的内存排布不一致。文章从内存对齐角度出发，对增加填充信号、扩大信号组长度 等多种方案进行了详细的阐述，并提出最终解决方案。研究为跨平台 Socket 通讯时，结构体 数据类型的定义提供了重要指导意义和实际工程价值。

关键词: 套接字通讯；内存对齐；跨平台；位填充