Method and system for detecting memory occupancy state of embedded system

Abstract

The invention discloses a method and a system for detecting memory occupancy state of an embedded system, and the method for detecting the memory occupancy state of the embedded system comprises the following steps: S1) taking over a memory management function and performing function call; S2) tracking the function call and acquiring a call chain of a thread when the function runs so as to be convenient to position precise positions for applying for and releasing a memory; S3) performing statistics on the memory by adopting the way of a two-way chained list and detecting the memory occupancy situation; and S4) displaying the memory occupancy situation. The invention further discloses the system for detecting the memory occupancy state of the embedded system. As for the method and the system for detecting the memory occupancy state of the embedded system, the memory management function is taken over, call information of the current function is tracked, the memory leakage position can be accurately positioned, the memory occupancy situation can be displayed, the universality is strong, and the detection of the memory using problem can be greatly facilitated.

Description

technical field [0001] The invention relates to the field of embedded software, in particular to a method and system for detecting memory occupation status of an embedded system. Background technique [0002] At present, with the development of information technology, computers are widely used in all fields. Among them, the use of computer memory often affects the efficiency of a system operation. If there is a memory leak or memory error, it will greatly affect the system. efficiency. The so-called memory leak is generally a leak of heap memory. Heap memory refers to the memory allocated from the heap by using some specific functions during the running of the application, and then released by specific functions after use. If the application does not release it after use, this memory cannot be used again, and this memory is considered to be leaked. [0003] On the X86 platform, virtual machine technology is used to fully monitor the memory usage of the entire program, and ...

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Problems solved by technology

[0003] On the X86 platform, virtual machine technology is used to fully monitor the memory usage of the entire program, and all relevant information can be obtained. Moreover, most memory detection tools are based on the X86 architecture, such as: BoundsChecker, Purify, etc. The function is very powerful, but this type of memory detection tool requires a lot of system resources; that is, it needs to occupy a large amount of memory and CPU resources, such as: monitoring a server program, it needs to run for several days, weeks or even months, if There are memory leaks or errors, and if the memory is not released in time, the system performance will be low, the efficiency will be slow, and the system will even crash

[0004] In embedded software, the memory of the embedded system is small, the CPU runs slowly, and memory leaks will seriously affect the performance of the embedded system. Therefore, effective tools should be used to detect its memory usage. However, most The detection tool only provides the information of the last function where the memory leak occurs, and does not provide the function call chain

It is impossible to know exactly in which function call chain a memory leak occurs, and it is impossible to precisely locate the problem

A hook is added to the GCC memory management function, and the memory usage information is output to a file at runtime, and finally counted, but the memory usage information cannot be accurately obtained; some tools use the backtrace function of GCC to obtain the function call chain, but this The function is related to the chip system, and its versatility is not strong. In some chip systems, such as: mips system, this function cannot get this information

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