CN106776304A - Method based on printout information is controlled in multithreading exploitation under built-in Linux - Google Patents
Method based on printout information is controlled in multithreading exploitation under built-in Linux Download PDFInfo
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- CN106776304A CN106776304A CN201611100587.9A CN201611100587A CN106776304A CN 106776304 A CN106776304 A CN 106776304A CN 201611100587 A CN201611100587 A CN 201611100587A CN 106776304 A CN106776304 A CN 106776304A
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- Prior art keywords
- thread
- printf
- linux
- print control
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Classifications
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- G—PHYSICS
- 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
- G06F11/362—Software debugging
- G06F11/3644—Software debugging by instrumenting at runtime
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
- G06F9/30003—Arrangements for executing specific machine instructions
- G06F9/30076—Arrangements for executing specific machine instructions to perform miscellaneous control operations, e.g. NOP
- G06F9/3009—Thread control instructions
Abstract
Method based on printout information is controlled in multithreading exploitation under built-in Linux of the invention, including：A) creates print control file, for receiving and storing thread name to be printed；B) creates record sheet, for storing Thread Id and thread name；C) defines global character pointer p, and print control file is mapped into global character pointer p；D) realizes printf functions again；E) outputs type information.The method that the present invention proposes dynamic control type information output in C language exploitation under a kind of built-in Linux, the method realizes printf functions again in the case of use habit and C standard printf function identicals is kept；When program is run, it is only necessary to thread name to be printed is input into print control file, it is possible to realize the function of dynamic control type information output.The method is convenient and swift, save remodified for the output of control type information, time of compiled code, effectively increase debugging efficiency and development efficiency.
Description
Technical field
The present invention relates to it is a kind of based under built-in Linux multithreading exploitation in control printout information method, more
Specifically, more particularly to a kind of method based on printout information is controlled in multithreading exploitation under built-in Linux.
Background technology
It is crucial for code to become for the ease of tracking problem under current built-in Linux in C language exploitation debugging process
Value checks, output of message etc., it will usually call the printf functions type informations to carry out debugging tracking.But when printf letters
During number is for multiple threads, and developer can only be changed generation when needing the printf Debugging message for shielding some threads to export
Code, corresponding printf functions is deleted or is commented out or is masked with macrodefinition, is then recompilated again, operation program, than
It is cumbersome；When usage quantity is many in multithreading for printf functions, this drawback is just more obvious, and it can be wasted
Developer's substantial amounts of time, used in writing above printf functions and annotation printf functions, seriously reduce development efficiency.
The content of the invention
The present invention is in order to overcome the shortcoming of above-mentioned technical problem, there is provided a kind of based on multithreading under built-in Linux
The method that printout information is controlled in exploitation.
Method based on printout information is controlled in multithreading exploitation under built-in Linux of the invention, its feature exists
In being realized by following steps：
A) creates print control file, creates the print control file for receiving and storing thread name to be printed, Linux
After system operation, commissioning staff writes the thread name of pre-print using echo orders to the print control file；
B) creates record sheet, creates the record sheet for storing Thread Id and thread name, whenever having thread to initiate, first
Judge whether the thread name is existing in record sheet, if existed, the corresponding ID of the title is updated；If no
In the presence of then by thread name and Thread Id while being stored in record sheet；
C) defines global character pointer p, using internal memory mapping function mmap, by the thread name to be printed that is stored with step a)
Print control file be mapped to global character pointer p；
D) realizes printf functions again, redefines a printf using the character different from printf, and make again
The printf of definition enter to participate in standard printf functions enter to join it is identical；Then again by macrodefinition, by standard printf
Replace with the title of the printf for redefining, with reach when using the printf for redefining with standard printf letters
Number has identical interface and effect；
E) outputs type information, under linux system, during using the printf type information for redefining, all threads are equal
The ID of this thread is obtained, and according to corresponding thread name in record sheet in ID finding steps a), then looked up complete in step c)
Whether contain this thread name in the internal memory that office character pointer p is pointed to, if then printing out information, moved back if not
Go out or return.
Method based on printout information is controlled in multithreading exploitation under built-in Linux of the invention, in step a)
The title of the print control file of definition and address can be：/ home/printfctl, using echo orders to the print control
File exports pre-print thread name form：Such as echo " taskname1 ">/ home/printfctl, to allow thread
The thread type information of entitled taskname1, by echo " taskname N ">>/ home/printfctl increases name
The thread output type information of referred to as tasknameN.
The beneficial effects of the invention are as follows：It is of the invention to be printed out based on control in multithreading exploitation under built-in Linux
The method of information, it is proposed that a kind of method that dynamic control type information is exported in C language exploitation under built-in Linux, the party
Method realizes printf functions again in the case of use habit and C standard printf function identicals is kept；Program is run
When, it is only necessary to thread name to be printed is input into print control file, it is possible to realize that dynamic control type information is exported
Function.The method is convenient and swift, save remodified for the output of control type information, time of compiled code, effectively
Improve debugging efficiency and development efficiency.
Brief description of the drawings
Fig. 1 is of the invention based on the method flow that printout information is controlled in multithreading exploitation under built-in Linux
Figure.
Specific embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, giving of the invention based on control printout information in multithreading exploitation under built-in Linux
Method flow diagram, it is realized by following steps：
A) creates print control file, creates the print control file for receiving and storing thread name to be printed, Linux
After system operation, commissioning staff writes the thread name of pre-print using echo orders to the print control file；
For example, the title of the print control file of definition and address can be：/ home/printfctl, using echo orders to
The print control file exports pre-print thread name form：Such as echo " taskname1 ">/ home/printfctl,
To allow thread name as the thread type information of taskname1, by echo " taskname N ">> /home/
Printfctl increases the thread output type information of entitled tasknameN.
B) creates record sheet, creates the record sheet for storing Thread Id and thread name, whenever thering is thread to initiate,
First determine whether whether the thread name is existing in record sheet, if existed, the corresponding ID of the title is updated；Such as
Fruit does not exist, then thread name and Thread Id are stored in into record sheet simultaneously；
There is no the concept of thread name, only Thread Id in Linux, the convenient identification pid of computer system, and mankind's convenient use
Thread name, if the use of Thread Id one being bad memory, two is that per secondary program, startup is all dynamic to Thread Id；Therefore introduce note
Record table is facilitating operation thread.
C) defines global character pointer p, using internal memory mapping function mmap, by the thread to be printed that is stored with step a)
The print control file of title is mapped to global character pointer p；
D) realizes printf functions again, redefines a printf using the character different from printf, and make again
The printf of definition enter to participate in standard printf functions enter to join it is identical；Then again by macrodefinition, by standard printf
Replace with the title of the printf for redefining, with reach when using the printf for redefining with standard printf letters
Number has identical interface and effect；
E) outputs type information, under linux system, during using the printf type information for redefining, all threads are equal
The ID of this thread is obtained, and according to corresponding thread name in record sheet in ID finding steps a), then looked up complete in step c)
Whether contain this thread name in the internal memory that office character pointer p is pointed to, if then printing out information, moved back if not
Go out or return.
The critical data of certain thread is checked in running if desired, usable echo orders are to defined in step 1
File write-in thread name；For example：Check that an information for thread can use the echo that such as issues orders if just hoped "
taskname1" >/ home/printoption, if it is desired to checking that multiple thread informations can be added such as using additional mode
echo "tasknameN" >> /home/printoption。
Method beneficial effect body based on control printout information in multithreading exploitation under built-in Linux of the invention
Now：
Beneficial effects of the present invention are as follows：
（1）, by print control file write one or more different thread names, task names, can control certain or
Certain several thread carries out type information output；Can change the next dynamic of control information and adjust printing in any time of program operation
Information output.
（2）, can cause debugging efforts become very efficiently, effectively improve software development efficiency.
（3）, release process when, printf sentences can be retained in program code, it is not necessary to delete.
（4）, on-site terminal is when needing to carry out malfunction elimination, the related letter that can be checked using this mode in terminal operating
Breath, is easy to quickly position the source of trouble, improves problem investigation efficiency.
（5）, scene operation is when going wrong, and can accomplish to retain scene, information is checked, without destorying the scene again
Operation program.
Claims (2)
1. it is a kind of based under built-in Linux multithreading exploitation in control printout information method, it is characterised in that pass through
Following steps are realized：
A) creates print control file, creates the print control file for receiving and storing thread name to be printed, Linux
After system operation, commissioning staff writes the thread name of pre-print using echo orders to the print control file；
B) creates record sheet, creates the record sheet for storing Thread Id and thread name, whenever having thread to initiate, first
Judge whether the thread name is existing in record sheet, if existed, the corresponding ID of the title is updated；If no
In the presence of then by thread name and Thread Id while being stored in record sheet；
C) defines global character pointer p, using internal memory mapping function mmap, by the thread name to be printed that is stored with step a)
Print control file be mapped to global character pointer p；
D) realizes printf functions again, redefines a printf using the character different from printf, and make again
The printf of definition enter to participate in standard printf functions enter to join it is identical；Then again by macrodefinition, by standard printf
Replace with the title of the printf for redefining, with reach when using the printf for redefining with standard printf letters
Number has identical interface and effect；
E) outputs type information, under linux system, during using the printf type information for redefining, all threads are equal
The ID of this thread is obtained, and according to corresponding thread name in record sheet in ID finding steps a), then looked up complete in step c)
Whether contain this thread name in the internal memory that office character pointer p is pointed to, if then printing out information, moved back if not
Go out or return.
2. it is according to claim 1 based under built-in Linux multithreading exploitation in control printout information method,
It is characterized in that：The title of the print control file defined in step a) and address can be：/ home/printfctl, uses
Echo orders export pre-print thread name form to the print control file：Such as echo " taskname1 "> /home/
Printfctl, to allow thread name as the thread type information of taskname1, by echo " taskname N ">> /
Home/printfctl increases the thread output type information of entitled tasknameN.
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| CN201611100587.9A CN106776304A (en) | 2016-12-05 | 2016-12-05 | Method based on printout information is controlled in multithreading exploitation under built-in Linux |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656868A (en) * | 2017-09-18 | 2018-02-02 | 上海斐讯数据通信技术有限公司 | A kind of adjustment method and system that thread name is obtained using thread private data |
| CN112486424A (en) * | 2019-09-12 | 2021-03-12 | 无锡江南计算技术研究所 | Parallel printing order-preserving agent method for user-transparent operation cores |
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| US5325530A (en) * | 1993-01-29 | 1994-06-28 | International Business Machines Corporation | Controller for sequential programming tools executed in a parallel computing environment |
| CN101515251A (en) * | 2009-03-31 | 2009-08-26 | 华为技术有限公司 | Board-level platform debugging method, device and system |
| CN101916223A (en) * | 2010-08-11 | 2010-12-15 | 无锡中星微电子有限公司 | Program debugging method and system |
| CN105260315A (en) * | 2015-11-13 | 2016-01-20 | 上海斐讯数据通信技术有限公司 | Method for debugging log in embedded system process |
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- 2016-12-05 CN CN201611100587.9A patent/CN106776304A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5325530A (en) * | 1993-01-29 | 1994-06-28 | International Business Machines Corporation | Controller for sequential programming tools executed in a parallel computing environment |
| CN101515251A (en) * | 2009-03-31 | 2009-08-26 | 华为技术有限公司 | Board-level platform debugging method, device and system |
| CN101916223A (en) * | 2010-08-11 | 2010-12-15 | 无锡中星微电子有限公司 | Program debugging method and system |
| CN105260315A (en) * | 2015-11-13 | 2016-01-20 | 上海斐讯数据通信技术有限公司 | Method for debugging log in embedded system process |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656868A (en) * | 2017-09-18 | 2018-02-02 | 上海斐讯数据通信技术有限公司 | A kind of adjustment method and system that thread name is obtained using thread private data |
| CN112486424A (en) * | 2019-09-12 | 2021-03-12 | 无锡江南计算技术研究所 | Parallel printing order-preserving agent method for user-transparent operation cores |
| CN112486424B (en) * | 2019-09-12 | 2022-10-04 | 无锡江南计算技术研究所 | User transparent arithmetic core parallel printing order-preserving proxy method |
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