A method of debugging a function function in an embedded system program in an application

Abstract

The invention discloses a method for debugging a function function in an embedded system program in an application. The method comprises the steps that a corresponding table between function pointersand function prototypes is established in an embedded system program, a function prototype analysis function is added, a communication port is used for receiving a function calling character string and analyzing the function calling character string, then a lookup table is matched, the function pointers needing to be executed are found, finally an execution function is skipped to, and an executionresult is returned. According to the function debugging method provided by the invention, the function debugging can be carried out on the premise of not influencing the program function, and the participation of a debugging tool is not needed. And when the program is executed, an application layer debugging method by outputting debugging information is avoided.

Description

technical field [0001] The invention relates to a method for debugging functions in embedded system programs in applications. Background technique [0002] In the field of software design, debugging is an indispensable link in the development process, and there are obvious differences in the debugging environment between general-purpose desktop operating systems and embedded operating systems. In the former, the debugger and the program to be debugged are often two processes running on the same operating system on the same machine, and the debugger process uses the call interface specially provided by the operating system (ptrace calls in early UNIX systems, today's process files system, etc.) to control and access the debugged program process. [0003] The latter (also known as remote debugging), in order to provide system developers with a flexible and convenient debugging interface, the debugger is still an application program running on a general desktop operating syste...

AI Technical Summary

Problems solved by technology

This brings about the following problems: how to communicate between the debugger and the program being debugged, how to notify the debugger in time when the program being debugged generates an exception, how the debugger controls and accesses the program being debugged, how the debugger recognizes the multitasking information about the program being debugged and Control a specific task, how the debugger handles certain information related to the target hardware platform (such as register information of the target platform, disassembly of machine code, etc.)

In short, the development and debugging of embedded systems is more difficult

[0004] At present, after the product is finalized in the embedded system, once there is a problem in the application of the product, there are not many ways to debug the application program under the condition of uninterrupted power supply. It mainly uses the communication interface to output debugging information, or uses special software for functional testing. In-depth program debugging

[0005] The method of using the communication interface to output debugging information keeps debugging information during program execution, which has the following disadvantages: 1) Occupying CPU resources and memory resources, affecting the real-time performance and stability of program execution; 2) The coverage of debugging information is limited and cannot be covered All functions, otherwise the debug information will be quite large;

[0006] Using special software for functional debugging can only test whether the function is normal, and the positioning is too broad to cover the execution of the function

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