嵌入式LwIP协议栈内存泄露问题研究  

Study of memory leak in embedded protocol LwIP

作　　者：芮万智[1] 许金[1] 王路 郭鹏辉[1] RUI Wan-zhi;XU Jin;WANG Lu;GUO Peng-hui(National Key Laboratory of Science and Technology on Vessel Integrated Power System,Naval Univ.of Engineering,Wuhan 430033,China;Naval Research Academy,Beijing 100161,China)

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,武汉430033 [2]海军研究院,北京100161

出　　处：《海军工程大学学报》2019年第6期19-22,共4页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(51507182,51477178)

摘　　要：为研究复杂软件系统中的内存泄露问题,首先从嵌入式协议栈LwIP使用过程中的一种网络传输性能下降现象出发,基于协议栈控制块内存管理参数,确定了协议栈内存泄露是导致设备长期运行出现该现象的直接原因;然后,结合协议栈源码详细分析了内存泄露的原因和机理,提供了一种解决此类问题的方法,并从编程接口的角度给出了避免出现内存泄露问题的使用原则,对LwIP协议栈的正确使用具有一定的指导意义。Memory leaks are recognized to be the major causes of memory exhaustion problems in complex software systems. Considering performance penalty of network transmission in application of embedded protocol LwIP, immediate cause of the phenomena is confirmed in base of parameter in memory control block, which leads to memory leak in long-running condition. Source codes of LwIP are used to analyze the mechanism of memory leak, and an approach to resolve the problem is put forward. Principle in avoiding memory leak is proposed from the standpoint of programmatic interface, which means a great deal to LwIP applications.

关 键 词：LWIP协议栈 内存泄露 中断 编程接口 

分 类 号：TM359[电气工程—电机]