CN109376030B - System for capturing embedded operating system exceptions - Google Patents
System for capturing embedded operating system exceptions Download PDFInfo
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- CN109376030B CN109376030B CN201811331450.3A CN201811331450A CN109376030B CN 109376030 B CN109376030 B CN 109376030B CN 201811331450 A CN201811331450 A CN 201811331450A CN 109376030 B CN109376030 B CN 109376030B
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- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0706—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0706—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment
- G06F11/0736—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment in functional embedded systems, i.e. in a data processing system designed as a combination of hardware and software dedicated to performing a certain function
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Abstract
A system for catching the embedded operating system anomaly, include the software configuration module, exception handling module, positioning analysis module, output and access module run on target board, the software configuration module catches the software to the operating system anomaly and disposes; the system comprises an abnormal processing module, an output and access module, an NVRAM (non-volatile random access memory) and an NVRAM (non-volatile random access memory), wherein the abnormal processing module is used for hanging an abnormal processing program into a system abnormal processing system, acquiring abnormal field information when the system abnormal processing system finds abnormality, analyzing an instruction address according to the abnormal field information, inputting the instruction address into the positioning analysis module to acquire a program source code segment causing the abnormality, forming the program source code segment and the abnormal field information into abnormal information, and finally calling the output and access module to output the abnormal information into the NVRAM; the output and access module saves the exception information to the NVRAM. According to the invention, the abnormal field information is stored at the first time when the abnormality occurs, and the analysis result is stored in the NVRAM, so that the offline checking and analysis of the abnormal information can be realized.
Description
Technical Field
The invention relates to the field of avionics system platform software, in particular to operating system anomaly capture software and a visual analysis tool.
Background
The new generation of embedded system puts forward new requirements on the aspects of reliability, maintainability and the like, and the vxWorks embedded operating system of the wind and river company is widely applied to the embedded fields of aerospace and the like due to the advantages of high reliability, high real-time performance, tailorability and the like. The vxWorks operating system only provides a small amount of printing information when the operating system is abnormal, experts are difficult to locate faults in the aspect of non-operating systems, meanwhile, the system is often halted when the system is abnormal, and the field information is lost after the system is restarted. Thus, operating system exceptions have been a difficult point in troubleshooting embedded systems. Therefore, the exception handling capability of the vxWorks operating system is enhanced, and the addition of the exception capture and analysis capability is particularly necessary for the maintenance of the embedded system.
Disclosure of Invention
The invention aims to provide a system for capturing the abnormity of an embedded operating system, which can save abnormal field information at the first time of the abnormity occurrence and save the analysis result to an NVRAM (non-volatile random access memory) together, thereby realizing the offline checking and analysis of the abnormity information. Meanwhile, by matching with an abnormal visual analysis tool, the visual positioning display of abnormal information can be further obtained, and the troubleshooting efficiency is obviously improved.
The invention aims to be realized by the following technical scheme:
a system for capturing embedded operating system exceptions, comprising operating system exception capture software running on a target board, the operating system exception capture software comprising a software processing module, the software processing module comprising:
a software configuration module: configuring the running state of the abnormal capturing software of the operating system and the parameters of the running process, and providing a query interface of the configuration information of the monitored embedded operating system;
an exception handling module: the method comprises the steps that an exception handling program is hung in a system exception handling system, when the system exception handling system finds that an embedded operating system is abnormal, the exception handling program obtains necessary exception field information, analyzes a command address according to the exception field information, inputs the command address into a positioning analysis module so as to obtain a program source code segment causing the exception, combines the program source code segment and the exception field information into exception information, and finally calls an output and access module to output the exception information into an NVRAM;
a positioning analysis module: the method comprises an instruction address corresponding information query function and an instruction address index table construction function, wherein the instruction address corresponding information query function is to query an index table according to an instruction address to obtain a mapping file, then query the index table according to the mapping file to obtain a program source file, and finally find a program source code segment corresponding to the instruction address in the program source file; the function of constructing the instruction information index table is to call an inquiry interface provided by a software configuration module to acquire configuration information when the operating system abnormally captures software to start, analyze image files corresponding to all program modules configured in the configuration information, and establish an index table of corresponding relations between instruction addresses and program source code segments in the image files, the program source files and the program source files according to the analysis result;
an output and access module: the exception information is saved into the NVRAM, and an interface for exporting the exception information saved in the NVRAM is provided.
Further, the system for capturing the embedded operating system abnormity also comprises a visual analysis tool running on the PC, wherein the visual analysis tool sends a command to the operating system abnormity capturing software, analyzes and stores the received abnormal information according to a corresponding format, and analyzes, positions and displays the abnormal information based on the module target file and the source file;
the operating system exception capture software further comprises:
a message processing module: analyzing the command sent by the data communication module and sending the command to the software processing module, and packaging the abnormal information sent by the software processing module and sending the abnormal information to the data communication module;
a first data communication module: communicating with a visual analysis tool on the PC.
According to the above feature, the visual analysis tool comprises:
a second data communication module: communicating with exception capture software on the target board.
A fault analysis window module: and analyzing the abnormal information, and displaying the information concerned by the client in a list or graphical mode.
According to the above feature, the fault analysis window module comprises:
a fault request module: sending abnormal information and loading information to an operating system abnormal capturing software request through a configuration network port;
the ELT software runs a configuration request module: sending an ELT software configuration information related operation command to an operation system exception capture software request through a configuration network port;
module configuration information request module: requesting to send a module configuration command to the abnormal capturing software of the operating system through a configuration network port;
an analysis display window module: loading and analyzing the abnormal information file, and displaying the information concerned by the client in a list or graphical mode, wherein the following is a module list displayed by a display window:
a fault analysis file: recording abnormal information stored in abnormal capturing software of operating system
The fault analysis result storage module: and recording abnormal information analyzed by the analysis display window and an operation result in a text mode.
The invention has the beneficial effects that: the invention enhances the processing capacity of the vxWorks operating system on the abnormity, improves the fault diagnosis efficiency of software debugging personnel and equipment detection and maintenance personnel, reduces the technical requirement bottleneck of troubleshooting personnel, and can be widely used for embedded systems based on the following CPUs: p2020, MPC7448, MPC8640 and MPC8270, and has a remarkable application prospect.
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FIG. 1 is a schematic diagram of a system for capturing embedded operating system exceptions;
FIG. 2 is a schematic diagram of a software processing module;
fig. 3 is a structural diagram of a fault analysis window module.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
A system for capturing embedded operating system exception shown in this embodiment is shown in fig. 1, and mainly includes two parts: the system comprises an operating system abnormity capturing software running on a target board and a visual analysis tool running on a PC.
The operating system exception capture software is mainly used for acquiring exception field information when an embedded operating system running on a target board has an exception error, and acquiring corresponding position information (hereinafter referred to as instruction address position information) of an exception instruction address in a source program by analyzing the exception field information and analyzing a debugging file. And the operating system exception capture software analyzes the exception field information and the instruction address position information as exception information and stores the exception field information and the instruction address position information in the NVRAM.
The function of each module of the abnormal capturing software of the operating system is as follows:
1) a software processing module: and (3) discovering the abnormity of the embedded operating system in time, acquiring abnormal information, and outputting and storing the abnormal information.
2) The message processing module: the main functions are to analyze the command sent by the data communication module and send the command to the software processing module, and to package the abnormal information sent by the software processing module and send the abnormal information to the data communication module.
3) A first data communication module: the main function is to communicate with the visual analysis tool on the PC.
The software processing module is a core component of the exception capture software, and the main structure of the software processing module is shown in fig. 2. The functions of each sub-module in the software processing module are described in detail as follows:
1) a software configuration module: the method mainly sets the running state and running process parameters of the abnormal capturing software of the operating system, and provides a query interface of the configuration information of the monitored embedded operating system.
The types of the operation process parameters comprise a software operation information base and a fault analysis process information base.
The software operation information base comprises some basic parameters of software operation, such as: the method comprises the following steps of software self-starting parameters (for configuring whether the ELT is started when the system is started or not, and if the ELT is not configured, the ELT can be started in a manual mode), an abnormal information storage starting position (for configuring a starting address of the ELT stored in the NVRAM), an abnormal information storage space size item (for configuring the storage space size of the ELT in the NVRAM), and software execution mode configuration (for configuring functions supported by software operation, which are composed of starting fault positioning and starting fault online analysis functions, and four execution modes can be configured).
The fault analysis process information base mainly comprises some dependency information and selection information in the fault analysis process, for example, the detection fault type represents an abnormal fault type needing ELT detection, and the scheme comprises four fault types of ISI (instruction acquisition error), DSI (data access error), Machine Check (system fault error) and Program (user instruction error); the abnormal field information type indicates which information needs to be acquired when a fault occurs, and the information comprises abnormal task information, system task information and system operation information; the serial port output indicates whether the abnormal information needs to be output by the serial port; the Watch Dog resetting interface is used for resetting the Watch Dog, so that the condition that the system is reset due to overtime of the Watch Dog caused by the operation of a tool is avoided; the debugging file information list comprises names and positions of debugging files, names of loading modules and storage positions of abnormal information, wherein the names of the loading modules are used for determining instruction address ranges corresponding to the modules, and the corresponding files can be conveniently obtained during subsequent positioning analysis.
2) An exception handling module: the method is mainly used for hooking an exception handling program into a system exception handling system, acquiring necessary exception field information according to a fault analysis process information base when an embedded operating system is abnormal and is switched into the hooked exception handling program through the exception handling system, analyzing an instruction address according to the exception field information, inputting the instruction address into a positioning analysis module so as to acquire a program source code segment causing the exception, forming the program source code segment and the exception field information into exception information, and finally calling an output and access module to output the exception information into an NVRAM. The system exception handling system is owned by the embedded operating system, and has the function of printing some information of exception sites including exception addresses, instruction addresses and the like when the embedded operating system runs abnormally, so as to assist in troubleshooting. The exception handling program provided by the software is based on a system exception handling system provided by an embedded operating system, and then enhances the information capture function of an exception site, so as to provide more detailed information for debugging and troubleshooting problems. The abnormal site information includes: abnormal vector information, abnormal task information, stack information, non-abnormal task information and system state information; the instruction address information is dynamic memory address information of a program running in an operating system, and an instruction of the address corresponds to a certain line in an actual source code. The function of the positioning analysis module is to convert and position the intuitive code information in the source code according to the abstract information of the instruction address information
3) A positioning analysis module: the method comprises an instruction address corresponding information query function and an instruction address index table construction function. The instruction address corresponding information query function is a function of acquiring and analyzing a debug file according to an instruction address, analyzing debug information, and finally acquiring a mapping file name, a program source file name and line number information (the three information are referred to as instruction address location information) corresponding to the instruction address in the program source file. The function of constructing the instruction information index table is to analyze the mapping files corresponding to all modules configured in the configuration information by the instruction address corresponding information query function when the software is started, and establish the index table of the corresponding relation between the instruction address and the instruction address position information according to the information obtained by analysis, so as to facilitate subsequent query. The positioning analysis module is used for positioning an instruction address to a source program by analyzing the debugging information contained in the file.
4) An output and access module: the output and access module mainly comprises a function of saving the abnormal information into the NVRAM and providing an interface for exporting the abnormal information saved in the NVRAM to a serial port or other files.
The visual analysis tool mainly sends a command to the abnormal capturing software of the operating system through the network port, analyzes and stores the received abnormal information according to a corresponding format, and analyzes, positions and displays the abnormal information based on a target file and a source file of the embedded operating system. The functions of the modules of the visual analysis tool are as follows:
1) a second data communication module: the main function is to communicate with the operating system exception capture software on the target board.
2) A fault analysis window module: the main function is responsible for displaying the loaded fault analysis files in a list or graphical mode according to a certain processing mode and algorithm.
The fault analysis window is a core component of a visual analysis tool, the main structure of the fault analysis window is shown in fig. 3, and the functions of each sub-module of the fault analysis window module are as follows:
1) a fault request module: and requesting to send exception information and loading information to the exception acquisition software of the operating system through the configuration network port.
2) The ELT software runs a configuration request module: and sending an ELT software configuration information related operation command to an operating system exception capture software request through a configuration network port. The significance of sending the operation command related to the ELT software configuration information is to intuitively set the configuration of the related parameters during the operation of the ELT software in the PC side interface.
3) Module configuration information request module: and requesting to send a configuration command of the target board to the abnormal capturing software of the operating system through the configuration network port. The module configuration information request is used for intuitively acquiring relevant information configured in the consulting target board in the PC side interface.
4) An analysis display window module: the analysis display window is responsible for displaying the loaded fault analysis files in a list or graphical mode according to a certain processing mode and algorithm, wherein the list is a module list displayed by the display window:
5) A fault analysis file: recording the abnormal information recorded in the abnormal capturing software of the operating system in a text mode, wherein the following two text modes are recorded:
6) And (3) fault analysis results: and recording the abnormal information and the operation result acquired by the analysis display window module in a text mode.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (4)
1. A system for trapping embedded operating system exceptions, comprising operating system exception trapping software running on a target board, wherein the operating system exception trapping software comprises a software processing module comprising:
a software configuration module: configuring the running state of the abnormal capturing software of the operating system and the parameters of the running process, and providing a query interface for querying and monitoring the configuration information of the embedded operating system; the types of the operation process parameters comprise a software operation information base and a fault analysis process information base;
the software operation information base comprises some basic parameters of software operation, including software self-starting parameters, abnormal information storage initial positions, abnormal information storage space size items and software execution mode configuration;
the fault analysis process information base mainly comprises dependency information and selection information in the fault analysis process, and comprises the following steps: detecting a fault type; the abnormal field information type represents information which needs to be acquired when a fault occurs, and the information comprises abnormal task information, system task information and system operation information; the serial port output indicates whether the abnormal information needs to be output by the serial port; the Watch Dog resetting interface is used for resetting the Watch Dog and avoiding the overtime of the Watch Dog caused by the operation of a tool so as to trigger the system resetting; the debugging file information list comprises names and positions of debugging files, names of loading modules and storage positions of abnormal information, wherein the names of the loading modules are used for determining instruction address ranges corresponding to the modules, and the corresponding files can be conveniently obtained during subsequent positioning analysis;
an exception handling module: the method comprises the steps that an exception handling program is hung in a system exception handling system, when the system exception handling system finds that an embedded operating system is abnormal, the exception handling program obtains necessary exception field information, analyzes an instruction address according to the exception field information, inputs the instruction address into a positioning analysis module to obtain a program source code segment causing the exception, enables the program source code segment and the exception field information to form exception information, and finally calls an output and access module to output the exception information into an NVRAM; the system exception handling system is owned by the embedded operating system, and exception field information comprises: abnormal vector information, abnormal task information, stack information, non-abnormal task information and system state information;
the positioning analysis module converts and positions intuitive code information in source codes according to instruction address information, and comprises an instruction address corresponding information query function and an instruction address index table construction function, wherein the instruction address corresponding information query function is to query an index table according to an instruction address to obtain a mapping file, then query the index table according to the mapping file to obtain a program source file, and finally find a program source code segment corresponding to the instruction address in the program source file; the instruction address index table building function is that when the operating system abnormally captures the starting of software, a query interface provided by a software configuration module is called to obtain configuration information, image files corresponding to all program modules configured in the configuration information are analyzed, and an index table of the corresponding relation between an instruction address and program source code segments in the image files, the program source files and the program source files is built according to the analysis result;
an output and access module: the exception information is saved into the NVRAM, and an interface for exporting the exception information saved in the NVRAM is provided.
2. The system for capturing embedded operating system anomalies according to claim 1, further comprising a visual analysis tool running on a PC, the visual analysis tool sending commands to operating system anomaly capture software, parsing and storing received anomaly information according to a corresponding format, and analyzing, locating and displaying the anomaly information based on a module target file and a source file;
the operating system exception capture software further comprises:
a message processing module: analyzing the command sent by the data communication module and sending the command to the software processing module, and packaging the abnormal information sent by the software processing module and sending the abnormal information to the data communication module;
a first data communication module: communicating with a visual analysis tool on the PC.
3. The system of claim 2, wherein the visualization analysis tool comprises:
a second data communication module: communicating with anomaly capture software on a target board;
a fault analysis window module: and analyzing the abnormal information, and displaying the information concerned by the client in a list or graphical mode.
4. The system of claim 3, wherein the failure analysis window module comprises:
a fault request module: sending abnormal information and loading information to an operating system abnormal capturing software request through a configuration network port;
the ELT software runs a configuration request module: sending an ELT software configuration information related operation command to an operation system exception acquisition software request through a configuration network port;
module configuration information request module: requesting to send a module configuration command to the abnormal capturing software of the operating system through a configuration network port;
an analysis display window module: loading and analyzing the abnormal information file, and displaying the information concerned by the client in a list or graphical mode, wherein the following is a module list displayed by a display window:
a fault analysis file: recording abnormal information stored in abnormal capturing software of operating system
The fault analysis result storage module: and recording abnormal information analyzed by the analysis display window and an operation result in a text mode.
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| CN107908495A (en) * | 2017-11-15 | 2018-04-13 | 南京南瑞继保电气有限公司 | A kind of embedded system exception record methods of exhibiting |
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| CN1286431A (en) * | 1999-11-30 | 2001-03-07 | 深圳市中兴通讯股份有限公司 | Embedded software aided debugging method |
| CN101211309A (en) * | 2006-12-29 | 2008-07-02 | 中兴通讯股份有限公司 | Embedded system progress abnormal tracking position-finding method |
| CN107908495A (en) * | 2017-11-15 | 2018-04-13 | 南京南瑞继保电气有限公司 | A kind of embedded system exception record methods of exhibiting |
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