Method for user mode to implement exception stack traceback of ARM architecture device

Abstract

The present invention provides a method for a user mode to implement an exception stack traceback of an ARM architecture device. The method comprises: adding compilation options -fnoomit-frame-pointer and -rdynamic into a Markerfile of a user mode program; adding an SIGSEGV semaphore processing function arm_debug into a user mode, wherein the processing function arm_debug is capable of printing information when the program runs abnormally; and storing the printed information when the program runs abnormally into a storage medium. According to the method provided by the present invention, by printing an ARM hardware register, exception stack information and an exception function calling relationship when the user mode program runs abnormally, and storing all the information into the storage medium, rapid positioning of the cause of a problem is facilitated, and a solution to the problem can be timely found.

Description

technical field [0001] The invention relates to the technical field of network communication, and in particular to a method for realizing abnormal stack backtracking of an ARM architecture device in a user state. Background technique [0002] In the existing technology, it is normal for the program to run with problems, so it is very important to save the first scene information when the program runs abnormally. The linux kernel has a backtracking implementation of the exception stack, and the exception information will be printed directly when the kernel is abnormal; the user mode program Debugging can use the very powerful debugging function of gdb. R&D personnel generally compile a debuggable version when debugging the program, but the hardware devices (such as switches, security gateways, etc.) shipped from the factory are all non-debugging versions. There is no way for such a factory version to gdb It is impossible for R&D personnel to go to the site to debug immediatel...

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, it is normal for the program to run with problems, so it is very important to save the first scene information when the program runs abnormally. The linux kernel has a backtracking implementation of the exception stack, and the exception information will be printed directly when the kernel is abnormal; the user mode program Debugging can use the very powerful debugging function of gdb. R&D personnel generally compile a debuggable version when debugging the program, but the hardware devices (such as switches, security gateways, etc.) shipped from the factory are all non-debugging versions. There is no way for such a factory version to gdb It is impossible for R&D personnel to go to the site to debug immediately if there is a problem with the device being used outside. Therefore, it is necessary to propose a method for recording abnormal information in a timely manner after a problem occurs in a non-debugged version of the device, so that subsequent developers can check and locate the cause of the problem.

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