CN106354635B - A kind of the program code segments self checking method and device of embedded device - Google Patents
A kind of the program code segments self checking method and device of embedded device Download PDFInfo
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- CN106354635B CN106354635B CN201610727513.1A CN201610727513A CN106354635B CN 106354635 B CN106354635 B CN 106354635B CN 201610727513 A CN201610727513 A CN 201610727513A CN 106354635 B CN106354635 B CN 106354635B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/36—Preventing errors by testing or debugging software
- G06F11/3604—Software analysis for verifying properties of programs
- G06F11/3612—Software analysis for verifying properties of programs by runtime analysis
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Abstract
The invention discloses the program code segments self checking methods and device of a kind of embedded device, belong to embedded system applied technical field, and method includes the following steps：File destination is parsed, memory location information, the code section length of logging program code area are obtained, and the backup area of entire program code in memory is backed up；When program is run, program Operational Zone and backup area data are relatively detected in real time；Comparison result is handled, if unanimously, data are normal；If inconsistent, data exception, and alert.It is added after program code segments self-checking function, it enables a device to detect program code segments in real time in the process of running, and it found the abnormal situation in time, once there is abnormal conditions, abnormal conditions can be recorded and alarmed by equipment, it helps field personnel that can position and solve the problems, such as soon as possible, avoids the expansion of problem and cause irremediable loss.
Description
Technical field
The invention belongs to embedded system applied technical fields, and in particular to a kind of program code segments of embedded device from
Detecting method and device.
Background technology
The generally requirement of the reliability and real-time of embedded device is all very high, will ensure the reliable of equipment in any case
Action, improve equipment reliability and real-time be embedded product design major tasks.Due to some it is uncertain because
The potential danger that element is not found either causes program code segments abnormal, and equipment may be caused to generate unpredictable danger,
In this case it is difficult to ensure that the reliability of device action, or even serious consequence can be caused to system.
Invention content
The object of the present invention is to provide a kind of program code segments self checking methods of embedded device, to solve embedded set
The problem of standby program code segments runtimeerror.
In order to solve the above technical problems, the present invention provides a kind of program code segments self checking method of embedded device, step
Including：
1) file destination is parsed, obtains memory location information, the code section length of logging program code area, and by entire journey
The backup area of sequence code in memory is backed up；
2) when program is run, program Operational Zone and backup area data are relatively detected in real time；
3) comparison result is handled, if unanimously, data are normal；If inconsistent, data exception, and alert.
Further, further include detecting and judging cpu load situation in real time, be used for setting program code segment self-test task gate
The step of threshold value, the threshold value include monitoring time interval and data self-test granularity；When cpu load increases, reduce data certainly
It examines granularity and/or increases monitoring time interval；When cpu load reduces, increase between data self-test granularity and/or reduction monitoring time
Every.
Further, when setting threshold value, the change of cpu load is divided into several ranges, each range corresponds to one
Threshold value.
Further, when further including data exception, the step of reporting is written into abnormal conditions.
The present invention also provides a kind of program code segments self-checking units of embedded device, including following module：For parsing
File destination obtains memory location information, the code section length of logging program code area, and in memory by entire program code
The module that is backed up of backup area；When being run for program, the mould of program Operational Zone and backup area data is relatively detected in real time
Block；For handling comparison result, if unanimously, data are normal；If inconsistent, data exception, and the module alerted.
Further, further include appointing for setting program code segment self-test for detecting and judging cpu load situation in real time
The module of business threshold value, the threshold value includes monitoring time interval and data self-test granularity；When cpu load increases, reduce number
According to self-test granularity and/or increase detection time interval；When cpu load reduces, when increasing data self-test granularity and/or reducing monitoring
Between be spaced.
Further, when setting threshold value, cpu load change is divided into several ranges, each range corresponds to a door
Threshold value.
Further, further include when being used for data exception, by the module of abnormal conditions write-in report.
The beneficial effects of the invention are as follows：Memory when parsing file destination by program code area in formulation backups,
Equipment compares detection program Operational Zone and Backup Data in real time when running.The program code segments self-checking function of addition, causes the device to
It is enough to detect program code segments in real time in the process of running, and found the abnormal situation in time, once noting abnormalities, equipment can be by exception
Situation is recorded and is alerted；Help field personnel position and solve the problems, such as soon as possible, ensure that equipment operation safety and
Reliability avoids the expansion of problem and causes irremediable loss.
Description of the drawings
Fig. 1 is program code segments self-test mission flow diagram；
Fig. 2 is CPU usage Detection task flow chart.
Specific implementation mode
Illustrate below in conjunction with the accompanying drawings, the present invention will be described in further detail.
The present invention provides a kind of program code segments self checking method of embedded device, and specific implementation step is as shown in Figure 1.
First, initialization needs the default value of the file destination and self-test task threshold that parse.Parsing file destination obtains
The address of program code segments and size, and the data of program code segments are copied into a specified core position, as backup
Code area.The default value of self-defined self-test task threshold, including monitoring time interval and data self-test granularity.In this embodiment
In, monitoring time interval default value is set as 10ms, and data self-test granularity default value is set as 128 bytes.
Then, program code segments Detection task is carried out.When equipment is run, real-time comparison program Operational Zone code segment and backup
The binary data of 128 bytes of area code section realizes the detection to code segment.It is not abnormal just to detect next 128 byte
Data make Field Force note abnormalities in time, and facilitate technology if it find that abnormal then alert and report is written in abnormal conditions
Personnel are accurately positioned exception and right a wrong.
Wherein, when equipment is run, code segment self-test task can set code segment self-test according to the load condition of CPU
Threshold value, threshold value include monitoring time interval and data self-test granularity, accomplish to ensure in the case where not influencing equipment performance
The safety and reliability of equipment operation.Specific CPU usage Detection task method is as shown in Figure 2.
In initial phase, the time interval of one section of constant time lag is recorded, other tasks all do not start to run at this time, can
Obtain a more accurate standard reference time interval.During the task run, the time interval of one section of constant time lag is recorded
(as the interval when task initialization), during equipment is run, the priority of the task is minimum, as long as there is other tasks fortune
Row, which, which will be interrupted, executes other tasks, is finished and in suspended state, the task until other tasks are carried out
It can just continue to execute.CPU tasks are more, and execution is more frequent, and the time interval of actual count is longer.By standard reference time
Interval and the time interval compare the occupation rate that can obtain CPU, it is known that the payload of CPU.
When cpu load is bigger, current CPU tasks burdensome calls change program code segments self-test task threshold
Interface, the data self-test granularity of program code segments self-test task is reduced into either monitoring time interval and increases or subtracts simultaneously
Small data self-test granularity and increase monitoring time interval, reduce self-test speed so that program code segments task by the method
Consumption of the reduction small as possible to CPU.
When cpu load is smaller, current CPU tasks are lighter, call change program code segments self-test task threshold
Interface, the data self-test granularity of program code segments self-test task is increased into either monitoring time interval and reduces or increases simultaneously
Big data self-test granularity and reduction monitoring time interval, self-test speed is improved by the method.
It can be specifically configured to：When CPU occupation rates are less than 30%, CPU self-test task calls change program code segments certainly
The monitoring time interval of program code segments self-test task is changed to 2ms by the interface of inspection task threshold, data self-test granularity is changed to
256 bytes；When CPU occupation rates are when between 30%~60%, threshold is all restored into default value；When CPU occupation rates are more than
When 60%, the interface of program code segments self-test task threshold is changed in CPU self-test task calls, by program code segments self-test task
Monitoring time interval is changed to 20ms, data self-test granularity is changed to 64 bytes.
In the above-described embodiments, cpu load situation is divided into three ranges, i.e., between 30% or less, 30%~60%,
60% or more, each range corresponds to a threshold value, i.e., 30% using lower threshold value as monitoring time interval 2ms, data self-test
256 byte of granularity；Threshold value is monitoring time interval 10ms, 128 byte of data self-test granularity between 30%~60%；60% with
Upper is monitoring time interval 20ms, 64 byte of data self-test granularity.It, can be according to actual conditions, by CPU as other embodiment
Load condition is further subdivided into more ranges, corresponding more threshold values, and even each cpu load value corresponds to a door
Threshold value can determine threshold value by directly calculating or tabling look-up at this time.
The present invention also provides a kind of program code segments self-checking units of embedded device, including following module：For parsing
File destination obtains memory location information, the code section length of logging program code area, and in memory by entire program code
The module that is backed up of backup area；When being run for program, the mould of program Operational Zone and backup area data is relatively detected in real time
Block；For handling comparison result, if unanimously, data are normal；If inconsistent, data exception, and the module alerted.
The program code segments self-checking unit of above-mentioned embedded device is actually based on a kind of meter of the method for the present invention flow
Calculation machine solution, i.e., a kind of software architecture, above-mentioned various modules are each treatment progress corresponding with method flow or journey
Sequence.Since sufficiently clear is complete for the introduction to the above method, therefore the device is no longer described in detail.
Claims (6)
1. a kind of program code segments self checking method of embedded device, which is characterized in that include the following steps：
1) file destination is parsed, obtains memory location information, the code section length of logging program code area, and by entire program generation
The backup area of code in memory is backed up；
2) when program is run, program Operational Zone and backup area data are relatively detected in real time；
3) comparison result is handled, if unanimously, data are normal；If inconsistent, data exception, and alert；
The step of further including detecting and judging cpu load situation in real time, being used for setting program code segment self-test task threshold value, institute
It includes monitoring time interval and data self-test granularity to state threshold value；When cpu load increases, reduce data self-test granularity and/or increasing
Big monitoring time interval；When cpu load reduces, increases data self-test granularity and/or reduce monitoring time interval.
2. the program code segments self checking method of embedded device according to claim 1, which is characterized in that setting threshold value
When, the change of cpu load is divided into several ranges, each range corresponds to a threshold value.
3. the program code segments self checking method of embedded device according to claim 1, which is characterized in that further include data
When abnormal, the step of reporting is written into abnormal conditions.
4. a kind of program code segments self-checking unit of embedded device, which is characterized in that including following module：
1) it is used to parse file destination, obtains memory location information, the code section length of logging program code area, and by entire journey
The module that the backup area of sequence code in memory is backed up；
2) when being used for program operation, the module of program Operational Zone and backup area data is relatively detected in real time；
3) it is used to handle comparison result, if unanimously, data are normal；If inconsistent, data exception, and the module alerted；
Further include for detecting and judging cpu load situation in real time, be used for the mould of setting program code segment self-test task threshold value
Block, the threshold value include monitoring time interval and data self-test granularity；Cpu load increase when, reduce data self-test granularity and/
Or increase detection time interval；When cpu load reduces, increases data self-test granularity and/or reduce monitoring time interval.
5. the program code segments self-checking unit of embedded device according to claim 4, which is characterized in that setting threshold value
When, cpu load change is divided into several ranges, each range corresponds to a threshold value.
6. the program code segments self-checking unit of embedded device according to claim 4, which is characterized in that further include being used for
When data exception, by the module of abnormal conditions write-in report.
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| CN109766267A (en) * | 2018-12-15 | 2019-05-17 | 中国平安人寿保险股份有限公司 | CPU high consumes Code location method, apparatus, electronic equipment and storage medium |
| CN111027072B (en) * | 2019-12-20 | 2024-02-27 | 北京安天网络安全技术有限公司 | Kernel Rootkit detection method and device based on elf binary standard analysis under Linux |
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| US7191445B2 (en) * | 2001-08-31 | 2007-03-13 | Texas Instruments Incorporated | Method using embedded real-time analysis components with corresponding real-time operating system software objects |
| CN102520974A (en) * | 2011-10-26 | 2012-06-27 | 京信通信系统（中国）有限公司 | Method and device for automatic recovery of repeater station radio frequency data table |
| CN104298599A (en) * | 2014-10-21 | 2015-01-21 | 卡斯柯信号有限公司 | Online embedded-software runtime fault self-checking and slice recovering method and device |
| CN104572414A (en) * | 2014-12-23 | 2015-04-29 | 深圳市邦彦信息技术有限公司 | Method and system for detecting CPU (Central Processing Unit) occupancy rate of vxWorks |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7191445B2 (en) * | 2001-08-31 | 2007-03-13 | Texas Instruments Incorporated | Method using embedded real-time analysis components with corresponding real-time operating system software objects |
| CN1908909A (en) * | 2006-08-24 | 2007-02-07 | 无敌科技(西安)有限公司 | Supported system of startup program and method thereof |
| CN102520974A (en) * | 2011-10-26 | 2012-06-27 | 京信通信系统（中国）有限公司 | Method and device for automatic recovery of repeater station radio frequency data table |
| CN104298599A (en) * | 2014-10-21 | 2015-01-21 | 卡斯柯信号有限公司 | Online embedded-software runtime fault self-checking and slice recovering method and device |
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