CN109086179B - Processing method and device under program exception condition - Google Patents
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- CN109086179B CN109086179B CN201810949401.XA CN201810949401A CN109086179B CN 109086179 B CN109086179 B CN 109086179B CN 201810949401 A CN201810949401 A CN 201810949401A CN 109086179 B CN109086179 B CN 109086179B
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- 238000003672 processing method Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 142
- 230000005540 biological transmission Effects 0.000 claims abstract description 69
- 238000012544 monitoring process Methods 0.000 claims abstract description 59
- 238000012545 processing Methods 0.000 claims abstract description 23
- 238000004891 communication Methods 0.000 claims description 10
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/2205—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested
- G06F11/221—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested to test buses, lines or interfaces, e.g. stuck-at or open line faults
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
Abstract
The embodiment of the application discloses a processing method under the condition of program exception, which is applied to a processing system, wherein the processing system comprises a father process monitoring module and PCI-e equipment, and the father process monitoring module judges whether a child process is abnormally exited or not according to an exit signal sent by an operating system kernel; and under the condition that the child process is determined to be abnormally exited, the parent process monitoring module logs out the memory address registered in the PCI-e device associated with the PCI-e device data transmission program according to the device number of the PCI-e device associated with the PCI-e device data transmission program and the memory address registered in the PCI-e device. Therefore, memory read-write errors caused by the fact that the PCI-e device transmits data programs and performs read-write operation by using invalid memory addresses are avoided, the influence on an operating system and other programs is prevented, and therefore damage caused under the abnormal condition of the programs is reduced.
Description
Technical Field
The present application relates to the technical field of software system driver design, and in particular, to a method and an apparatus for processing program exception conditions.
Background
Currently, a computer can utilize a PCI-e (peripheral component interconnect express) device to interact with other devices. Specifically, an application program installed in a user space (english: user space) in a computer installed with a Linux operating system can perform data interaction with other devices when running.
With the development of science and technology, a novel PCI-e device can support direct access to a memory of a user space. Specifically, when an application installed in a user space, such as a target application, runs, a read-write memory is pre-allocated to store data generated during the running process of the target application. And then registering the pre-allocated read-write memory address into the PCI-e device, wherein when the target application program performs data interaction with other devices, for example, when the other devices write data into the user space through the target application program, the PCI-e device can directly write the data sent by the other devices into the memory corresponding to the pre-registered memory address.
However, when the target application program strongly coupled to the PCI-e hardware device exits abnormally, the target application program usually cannot timely log off the memory address registered on the PCI-e device, which may cause the PCI-e device to still read and write data to the original memory address when other devices read and write data through the target application program, but the part of the memory may be unavailable or allocated to other programs by the operating system for use, and then, if the data is read and written to the part of the memory, a serious memory read and write error may be caused, or a serious influence may be caused to other programs.
Therefore, a method for reducing the damage caused by program exception is needed.
Disclosure of Invention
In order to solve the technical problem, the application provides a processing method under the condition of program exception, which can process the ending work in time when the program exception occurs, and reduce the harm caused by the program exception.
The embodiment of the application discloses the following technical scheme:
in a first aspect, an embodiment of the present application provides a processing method in the case of a program exception, which is applied to a processing system, where the processing system includes a parent process monitoring module and a PCI-e device; the method comprises the following steps:
the parent process monitoring module judges whether a child process is abnormally exited according to an exit signal sent by an operating system kernel, a PCI-e device data transmission program is operated in the child process, and the PCI-e device data transmission program is associated with the PCI-e device;
and under the condition that the child process is abnormally quitted, the parent process monitoring module logs out the memory address registered in the PCI-e device according to the device number of the PCI-e device and the memory address registered in the PCI-e device.
Optionally, the processing system further includes: PCI-e equipment transmission data program module;
the method further comprises:
and after the PCI-e device completes initialization and successfully applies for a memory in a user space and registers the memory address of the memory in the PCI-e device, the PCI-e device data transmission program module informs the parent process monitoring module of the device number of the PCI-e device and the memory address registered in the PCI-e device.
Optionally, the method further includes:
the parent process monitoring module creates a communication pipeline between the parent process monitoring module and the child process monitoring module, and creates the child process monitoring module;
and the parent process monitoring module loads the PCI-e device transmission data program in the child process.
Optionally, the method further includes:
and under the condition that the child process exits abnormally, the parent process monitoring module records a log.
Optionally, the parent process monitoring module operates circularly.
In a second aspect, an embodiment of the present application provides a processing apparatus in the case of a program exception, including:
the judging module is used for judging whether the subprocess abnormally exits according to an exit signal sent by an operating system kernel, a PCI-e device data transmission program is operated in the subprocess, and the PCI-e device data transmission program is associated with the PCI-e device;
and the processing module is used for logging off the memory address registered in the PCI-e equipment according to the equipment number of the PCI-e equipment and the memory address registered in the PCI-e equipment under the condition that the subprocess is abnormally logged out.
Optionally, the apparatus further comprises:
and the informing module is used for informing the father process monitoring module of the device number of the PCI-e device and the memory address registered in the PCI-e device after the PCI-e device completes initialization, successfully applies for a memory in a user space and registers the memory address of the memory in the PCI-e device.
Optionally, the apparatus further comprises:
the creating module is used for creating a communication pipeline between a parent process and the child process and creating the child process;
and the loading module is used for loading the PCI-e equipment transmission data program in the subprocess.
Optionally, the apparatus further comprises:
and the recording module is used for recording the log under the condition that the subprocess exits abnormally.
According to the technical scheme, the processing method under the program abnormal condition, provided by the embodiment of the application, is applied to a processing system, the processing system comprises a parent process monitoring module and PCI-e equipment, the parent process monitoring module can judge whether a child process is abnormally exited according to an exit signal sent by an operating system kernel, a PCI-e equipment data transmission program runs in the child process, and the abnormal exit of the child process indicates that the running PCI-e equipment data transmission program is abnormal; correspondingly, under the condition that the child process is determined to be abnormally quit, the parent process monitoring module logs out the memory address registered in the PCI-e device related to the PCI-e device data transmission program according to the device number of the PCI-e device related to the PCI-e device data transmission program and the memory address registered in the PCI-e device. Therefore, the father process monitoring module can timely cancel the memory address registered in the PCI-e device associated with the PCI-e device data transmission program under the condition that the PCI-e device data transmission program is judged to be abnormal, further, memory read-write errors caused by the fact that the PCI-e device data transmission program performs read-write operation by using an invalid memory address are avoided, influences on an operating system and other programs are prevented, and therefore damage caused under the abnormal program condition is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic flowchart of a processing method under an abnormal program condition according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a processing device in the case of a program exception according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the application provides a processing method under the condition of program exception, which can process ending work in time when the program exception occurs, and reduce the harm caused by the program exception.
The following first introduces the core technical idea of the processing method under the program exception condition provided in the embodiment of the present application:
the processing method under the program abnormal condition provided by the embodiment of the application is applied to a processing system, the processing system comprises a parent process monitoring module and PCI-e equipment, the parent process monitoring module can judge whether a child process is abnormally exited according to an exit signal sent by an operating system kernel, a PCI-e equipment transmission data program is operated in the child process, and the abnormal exit of the child process indicates that the operated PCI-e equipment transmission data program is abnormal; correspondingly, under the condition that the child process is determined to be abnormally quit, the parent process monitoring module logs out the memory address registered in the PCI-e device related to the PCI-e device data transmission program according to the device number of the PCI-e device related to the PCI-e device data transmission program and the memory address registered in the PCI-e device.
In the processing method under the program abnormal condition, the father process monitoring module can timely cancel the memory address registered in the PCI-e device related to the PCI-e device data transmission program under the condition of judging that the PCI-e device data transmission program is abnormal, further, the memory read-write error caused by the fact that the PCI-e device data transmission program utilizes an invalid memory address to carry out read-write operation is avoided, the influence on an operating system and other programs is prevented, and therefore the damage caused under the program abnormal condition is reduced.
The following describes a processing method for program exception conditions provided by the present application by way of example:
referring to fig. 1, fig. 1 is a schematic flowchart of a processing method in the case of program exception according to an embodiment of the present application. The management method is applied to a processing system which comprises a parent process monitoring module and a PCI-e device, and as shown in FIG. 1, the method comprises the following steps:
step 101: and the parent process monitoring module judges whether the child process is abnormally exited according to an exit signal sent by an operating system kernel, a PCI-e device data transmission program is operated in the child process, and the PCI-e device data transmission program is associated with the PCI-e device.
After receiving the exit signal sent by the operating system kernel, the parent process monitoring module can correspondingly determine the reason for the exit of the child process according to the exit signal sent by the operating system kernel. Specifically, since the operating system kernel correspondingly generates the exit signal carrying different identifiers according to the difference of the exit reasons when the child process exits, after the operating system kernel sends the exit signal to the parent process monitoring module, the parent process monitoring module can determine the reason for exiting the child process according to the identifier carried in the exit signal, and then can judge whether the child process exits abnormally according to the reason for exiting the child process.
It should be noted that, a PCI-e device data transmission program is usually run in the sub-process, and through the PCI-e device data transmission program, other devices may directly write the transmitted data into a memory corresponding to a memory address registered in the PCI-e device, or other devices may directly read data stored in the memory corresponding to the memory address registered in the PCI-e device, and when the sub-process exits abnormally, the sub-process correspondingly represents that the PCI-e device data transmission program is abnormal.
It should be noted that the PCI-e device data transmission program is associated with the PCI-e device, that is, when other devices transmit data program write data through the PCI-e device, the PCI-e device data transmission program directly writes data into the memory corresponding to the memory address registered in the associated PCI-e device; when other devices read data through the PCI-e device transmission data program, the PCI-e device transmission data program directly reads data from the memory corresponding to the memory address registered in the PCI-e device associated with the PCI-e device.
Before step 101 is executed, the parent process monitoring module needs to create a communication pipeline between itself and the child process, and create the child process; and loading the PCI-e equipment transmission data program in the subprocess. Accordingly, the parent process monitoring module can communicate with the child process through the communication pipeline, correspondingly, the parent process monitoring module can monitor the PCI-e device transmission data program running in the child process through the communication pipeline, and when the child process exits, namely when the PCI-e device transmission data program runs and is finished, the operating system kernel can send an exit signal to the parent process monitoring module through the communication pipeline.
Optionally, the processing system may further include a PCI-e device data transmission program module, where the PCI-e device data transmission program module may complete initialization of the PCI-e device, and after the user space successfully applies for a memory and registers a memory address in the PCI-e device, notify the parent process monitoring module of the device number of the PCI-e device and the memory address registered in the PCI-e device, that is, notify the parent process monitoring module of the device number of the PCI-e device and the memory address registered in the PCI-e device, which are associated with the PCI-e device data transmission program, so that the parent process monitoring module may perform a tail ending operation when the PCI-e device data transmission program is abnormal subsequently according to the information.
Step 102: and under the condition that the child process is abnormally quitted, the parent process monitoring module logs out the memory address registered in the PCI-e device according to the device number of the PCI-e device and the memory address registered in the PCI-e device.
And when the parent process monitoring module determines that the child process abnormally exits according to an exit signal sent by the child process, namely determines that the data transmission program of the PCI-e device running in the child process abnormally ends, the parent process monitoring module cancels the memory address registered in the PCI-e device according to the device number of the PCI-e device and the memory address registered in the PCI-e device.
It should be understood that, when the PCI-e device data transmission program module is started, the parent process monitoring module is informed of the device number of the PCI-e device associated with the parent process and the memory address registered in the PCI-e device, so that the parent process monitoring module can determine the PCI-e device data transmission program running in the child process first when it is determined that the child process exits abnormally, and then, according to the device number of the PCI-e device associated with the PCI-e device data transmission program and the memory address registered in the PCI-e device, search for the corresponding PCI-e device, and cancel the memory address registered in the PCI-e device, and perform the ending operation.
The parent process monitoring module can also record a log related to the abnormal exit of the child process in the current time under the condition that the child process exits abnormally, wherein the log can comprise related information such as an abnormal program, a reason of the program abnormality, the abnormal exit time of the child process and the like, so that a worker can maintain the PCI-e device data transmission program according to the content of the log in the subsequent process and analyze the reason of the abnormality.
It should be noted that, the above-mentioned parent process monitoring module usually works in a loop, that is, after determining that the child process exits abnormally, the parent process monitoring module restarts to recreate the communication pipe and the child process between itself and the child process, then loads the PCI-e device transmission data program in the created child process, receives the device number of the PCI-e device and the memory address registered in the PCI-e device, which are associated with the PCI-e device transmission data program module, and when it is monitored that the child process exits abnormally again, the parent process monitoring module cancels the memory address registered in the PCI-e device, closes the child process, and so on.
The condition for triggering the abnormal ending of the PCI-e device data transmission program is random, namely the PCI-e device data transmission program may be abnormally ended due to a specific reason in a certain running process, but the abnormal ending of the PCI-e device data transmission program cannot occur in each running process, so that once the PCI-e device data transmission program is abnormally ended, the parent process monitoring module circularly works, and the PCI-e device data transmission program can be ensured to be restarted.
In the processing method under the program abnormal condition, the father process monitoring module can timely cancel the memory address registered in the PCI-e device related to the PCI-e device data transmission program under the condition of judging that the PCI-e device data transmission program is abnormal, further, the memory read-write error caused by the fact that the PCI-e device data transmission program utilizes an invalid memory address to carry out read-write operation is avoided, the influence on an operating system and other programs is prevented, and therefore the damage caused under the program abnormal condition is reduced.
In addition, the application also provides a processing device under the condition of program exception. Referring to fig. 2, fig. 2 is a schematic diagram of a processing apparatus 200 in the event of a program exception, where the processing apparatus 200 in the event of the program exception includes:
a judging module 201, configured to judge whether a subprocess abnormally exits according to an exit signal sent by an operating system kernel, where the subprocess runs a PCI-e device data transmission program, and the PCI-e device data transmission program is associated with a PCI-e device;
a processing module 202, configured to, when the subprocess abnormally exits, logout the memory address registered in the PCI-e device according to the device number of the PCI-e device and the memory address registered in the PCI-e device.
Optionally, the apparatus further comprises:
and the informing module is used for informing the father process monitoring module of the device number of the PCI-e device and the memory address registered in the PCI-e device after the PCI-e device completes initialization, successfully applies for a memory in a user space and registers the memory address of the memory in the PCI-e device.
Optionally, the apparatus further comprises:
the creating module is used for creating a communication pipeline between a parent process and the child process and creating the child process;
and the loading module is used for loading the PCI-e equipment transmission data program in the subprocess.
Optionally, the apparatus further comprises:
and the recording module is used for recording the log under the condition that the subprocess exits abnormally.
The processing device under the program abnormal condition can timely cancel the memory address registered in the PCI-e device associated with the PCI-e device data transmission program under the condition that the PCI-e device data transmission program is judged to be abnormal, further, the memory read-write error caused by the fact that the PCI-e device data transmission program carries out read-write operation by using an invalid memory address is avoided, the influence on an operating system and other programs is prevented, and therefore the damage caused under the program abnormal condition is reduced.
It should be noted that, in the present specification, all the embodiments are described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus and system embodiments, since they are substantially similar to the method embodiments, they are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described embodiments of the apparatus and system are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The above description is only one specific embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. A processing method under the condition of program exception is characterized in that the processing method is applied to a processing system, and the processing system comprises a father process monitoring module, a PCI-e device and a PCI-e device data transmission program module; the method comprises the following steps:
the parent process monitoring module judges whether a child process is abnormally exited according to an exit signal sent by an operating system kernel, a PCI-e device data transmission program is operated in the child process, and the PCI-e device data transmission program is associated with the PCI-e device;
under the condition that the child process is abnormally quitted, the parent process monitoring module logs out the memory address registered in the PCI-e device according to the device number of the PCI-e device and the memory address registered in the PCI-e device;
and after the PCI-e device completes initialization and successfully applies for a memory in a user space and registers the memory address of the memory in the PCI-e device, the PCI-e device data transmission program module informs the parent process monitoring module of the device number of the PCI-e device and the memory address registered in the PCI-e device.
2. The method of claim 1, further comprising:
the parent process monitoring module creates a communication pipeline between the parent process monitoring module and the child process monitoring module, and creates the child process monitoring module;
and the parent process monitoring module loads the PCI-e device transmission data program in the child process.
3. The method of claim 1, further comprising:
and under the condition that the child process exits abnormally, the parent process monitoring module records a log.
4. The method of claim 1, wherein the parent process monitoring module cycles.
5. A processing apparatus for handling program exception conditions, comprising:
the judging module is used for judging whether the subprocess abnormally exits according to an exit signal sent by an operating system kernel, a PCI-e device data transmission program is operated in the subprocess, and the PCI-e device data transmission program is associated with the PCI-e device;
the processing module is used for logging off the memory address registered in the PCI-e equipment according to the equipment number of the PCI-e equipment and the memory address registered in the PCI-e equipment under the condition that the subprocess is abnormally logged out;
and the informing module is used for informing the parent process monitoring module of the device number of the PCI-e device and the memory address registered in the PCI-e device after the PCI-e device completes initialization, successfully applies for a memory in a user space and registers the memory address of the memory in the PCI-e device.
6. The apparatus of claim 5, further comprising:
the creating module is used for creating a communication pipeline between a parent process and the child process and creating the child process;
and the loading module is used for loading the PCI-e equipment transmission data program in the subprocess.
7. The apparatus of claim 5, further comprising:
and the recording module is used for recording the log under the condition that the subprocess exits abnormally.
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| US7752355B2 (en) * | 2004-04-27 | 2010-07-06 | International Business Machines Corporation | Asynchronous packet based dual port link list header and data credit management structure |
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| CN1480878A (en) * | 2002-09-02 | 2004-03-10 | 联想(北京)有限公司 | Method for obtaining information of linux operation system |
| CN100543683C (en) * | 2006-12-26 | 2009-09-23 | 华为技术有限公司 | The method and system that process is monitored |
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