An urban rail transit signal system software buffer area checking method

Abstract

The embodiment of the invention provides an urban rail transit signal system software buffer area range checking method, which comprises the following steps of: registering a stack area array in the execution process of a software buffer area range checking function; checking whether the address quoted by the current pointer is in an allocated memory address interval, wherein the memory address interval is an interval corresponding to the preset area array; wherein the preset area array comprises the stack area array, a pre-registered global array and a pre-registered stack area array; and ifthe first check result is yes, calling search functions in one-to-one correspondence with all the intervals to continue to check the address through all the search functions, and determining whether the address exceeds the range of the software buffer according to the second check result. According to the method for checking the buffer area of the urban rail transit signal system software providedby the embodiment of the invention, check of the buffer area of the urban rail transit signal system software can be realized through simplified codes.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of rail transit, in particular to a method for checking the range of a software buffer zone in an urban rail transit signaling system. Background technique [0002] In the rail transit signal system software, such as regional controllers, on-board equipment, etc., there will be occasional equipment downtime during the operation process, and it is difficult to locate and find problems in the operation log. After repeated indoor testing, it is often found that the program crashes due to software buffer access out of bounds. In the software code of the vehicle operation process, the memory space of the array is allocated once, and then it is accessed and called during the running of the program, and the access to the array buffer is often out of bounds during the calling process, and the compiler However, the compiler cannot find such problems, and the code will crash when it encounte...

AI Technical Summary

Problems solved by technology

However, judging whether the access index exceeds the buffer limit will increase the complexity of the code, and the change of the buffer limit will also affect the judgment code, resulting in difficulties in code maintenance and other unnecessary errors.

For example, in a rail transit operation line, vehicles often brake suddenly due to unknown reasons, and it is finally found that the code modification error in a complex logic processing function is due to the buffer used in the protection function in a function function Arrays, on the basis of logical code branches, add many protective branches, resulting in increased code complexity, difficult to understand accurately, resulting in logical errors when modifying code

The buffer protection measures affect the complexity of the existing code, resulting in occasional problems, which need to be avoided as much as possible

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