Embedded system memory write-overflow detection method and system

Abstract

The present invention provides a detection method for the memory write-overflow of an embedded system, and has the procedures that: (a) the size of the detected memory is defined; (b) when allocating a memory block, a detected memory is arranged at the high address labored to the memory block, and the initial value of the content in the detected memory is established; (c) when performing the detection of the write-overflow of the memory, the value in the detected memory is compared with the initial value; when the value in the detected memory is not equal to the initial value, the memory write-overflow is judged to exist. The present invention can dynamically detect the memory write-overflow of the system in time and can position memory write-overflow to the file name and the line number applied for the memory, thereby being greatly convenient for the developer to find out the reasons of the memory write-overflow. At the same time, the present invention also has the memory protection function, and is not only applied to the test stage of the equipment, but also is applied to the application stage of the equipment.

Description

technical field [0001] The invention relates to the memory management technology of an embedded system, in particular to a detection method and system for memory writing out of bounds in the embedded system. Background technique [0002] Generally, an embedded system runs in a communication device, and the system can access a linear memory address space, that is, any program in the system can read or write to any memory of the system. This makes the memory data between tasks in the embedded system can be accessed freely, so it is possible to destroy the memory data of this task and other tasks by writing out of the memory block. Memory write out of bounds may cause serious problems. Because adjacent memory data is destroyed, other functions or tasks of the program may have unpredictable consequences during execution, resulting in system exceptions and serious impacts. [0003] Memory write out of bounds is a very common type of problem in embedded systems. Once this problem...

AI Technical Summary

Problems solved by technology

Memory write out of bounds may cause serious problems. Because adjacent memory data is destroyed, other functions or tasks of the program may have unpredictable consequences during execution, resulting in system exceptions and serious impact.

[0003] Memory write out of bounds is a very common type of problem in embedded systems. Once this problem exists, it often has different abnormal performances. It is generally difficult to find and locate, and find out the cause of write out of bounds

[0004] At present, software tools are generally used to detect memory write out of bounds, but this has several shortcomings

First, the memory overhead of these tools is relatively large

Second, these tools can generally only be used during the testing phase of the application, and cannot be used when the application is released to run on the communication device

However, some memory writes out of bounds are difficult to find during the test phase, and often only appear in actual use, which makes it impossible to detect all memory writes out of bounds

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