CN109086179B - Processing method and device under program exception condition - Google Patents

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

A kind of processing method and device in case of program abnormality

technical field

The present application relates to the technical field of software system driver program design, and in particular, to a method and device for processing abnormal programs.

Background technique

At present, a computer can use a PCI-e (English: peripheral component interconnectexpress) device to perform data interaction with other devices. Specifically, an application program installed in a user space (English: user space) in a computer with a Linux operating system installed can perform data interaction with other devices when running.

With the development of science and technology, new PCI-e devices can support direct access to user space memory. Specifically, when an application installed in the user space, such as a target application, is pre-allocated read and write memory to store data generated during the running of the target application. Then register the pre-allocated read and write memory address to the PCI-e device. When the target application interacts with other devices, for example, when other devices write data to the user space through the target application, the PCI-e device can Directly write the data sent by other devices into the memory corresponding to the pre-registered memory address.

However, when the target application with strong coupling to the PCI-e hardware device exits abnormally, the target application usually cannot deregister the memory address registered on the PCI-e device in a timely manner, which may lead to When other devices read and write data through the target application, the PCI-e device will still read and write data to the original memory address, but this part of the memory may be unavailable or allocated to other programs by the operating system. Partial memory read and write data will cause serious memory read and write errors, or have a serious impact on other programs.

Therefore, there is an urgent need for a method that can reduce the harm caused by program abnormality.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the present application provides a processing method in the case of program abnormality, which can handle the finishing work in time when the program is abnormal, and reduce the harm caused by the abnormal program.

The embodiments of the present application disclose the following technical solutions:

In a first aspect, an embodiment of the present application provides a method for processing abnormal programs, which is applied to a processing system, where the processing system includes a parent process monitoring module and a PCI-e device; the method includes:

The parent process monitoring module judges whether the child process exits abnormally according to the exit signal sent by the operating system kernel. e device association;

In the case that the child process exits abnormally, the parent process monitoring module cancels the registered memory address 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. memory address.

Optionally, the processing system further includes: a PCI-e device data transmission program module;

Then the method further includes:

The PCI-e device completes initialization, and after the user space successfully applies for memory and registers the memory address of the memory to the PCI-e device, the PCI-e device transmission data program module informs the parent process to monitor The module includes 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 itself and the child process, and creates the child process;

The parent process monitoring module loads the PCI-e device data transmission program in the child process.

Optionally, the method further includes:

When the child process exits abnormally, the parent process monitoring module records a log.

Optionally, the parent process monitoring module works cyclically.

In a second aspect, an embodiment of the present application provides a processing device under abnormal program conditions, including:

The judgment module is used to judge whether the child process exits abnormally according to the exit signal sent by the operating system kernel, and the PCI-e device data transmission program is run in the child process, and the PCI-e device data transmission program and the PCI-e device are used to transmit data. device association;

A processing module, configured to cancel the memory 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 when the sub-process exits abnormally address.

Optionally, the device further includes:

a notification module, used to notify the parent process monitoring module of the PCI after the PCI-e device completes initialization, and after the user space successfully applies for memory and registers the memory address of the memory to the PCI-e device -e device number of the device and the memory address registered in said PCI-e device.

Optionally, the device further includes:

A creation module is used to create a communication pipeline between the parent process and the child process, and to create the child process;

A loading module, configured to load the PCI-e device data transmission program in the sub-process.

Optionally, the device further includes:

The recording module is configured to record a log when the subprocess exits abnormally.

It can be seen from the above technical solutions that the processing method provided by the embodiment of the present application under abnormal program conditions is applied to a processing system, and the processing system includes a parent process monitoring module and a PCI-e device, and the parent process monitoring module can The exit signal sent by the operating system kernel determines whether the child process exits abnormally. There is a PCI-e device data transmission program running in the child process. If the child process exits abnormally, it indicates that the running PCI-e device data transmission program is abnormal; correspondingly In the case of determining that the child process exits abnormally, the parent process monitoring module cancels the association of 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 registered memory address. The memory address registered in the PCI-e device. In this way, the parent process monitoring module can timely cancel the memory address registered in the PCI-e device associated with the data transmission program of the PCI-e device when judging that the data transmission program of the PCI-e device is abnormal. The -e device transmits data programs using invalid memory addresses for read and write operations, causing memory read and write errors to prevent the impact on the operating system and other programs, thereby reducing the harm caused by program exceptions.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic flowchart of a processing method under abnormal program conditions provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a processing apparatus provided in an embodiment of the present application in the case of a program abnormality.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the application described herein can, for example, be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

The embodiment of the present application provides a processing method in the event of a program abnormality, which can handle the finishing work in a timely manner when the program is abnormal, and reduce the harm caused by the abnormal program.

The core technical ideas of the processing method in the case of abnormal program conditions provided by the embodiments of the present application are first introduced below:

The processing method in the case of program exception provided by the embodiment of the present application is applied to a processing system. The processing system includes a parent process monitoring module and a PCI-e device, and the parent process monitoring module can, according to an exit signal sent by the operating system kernel, It is judged whether the child process exits abnormally. There is a PCI-e device data transmission program running in the child process. If the child process exits abnormally, it indicates that the PCI-e device transmission data program running in it is abnormal; accordingly, it is determined that the child process exits abnormally. In this case, the parent process monitoring module deregisters the PCI-e device registered in the PCI-e device associated with the PCI-e device data transfer program according to the device number of the PCI-e device associated with the PCI-e device data transfer program and the registered memory address. memory address.

In the above processing method in case of abnormal program, the parent process monitoring module can timely cancel the memory registered in the PCI-e device associated with the data transmission program of the PCI-e device in the case of judging that the data transmission program of the PCI-e device is abnormal In addition, it can avoid memory read and write errors caused by the use of invalid memory addresses for read and write operations by the PCI-e device data transmission program, and prevent the impact on the operating system and other programs, thereby reducing the harm caused by program exceptions.

The processing method in the case of abnormality of the program provided by the present application will be introduced below by way of example:

Referring to FIG. 1 , FIG. 1 is a schematic flowchart of a processing method in the case of a program abnormality provided by an embodiment of the present application. The management method is applied to a processing system, and the processing system includes a parent process monitoring module and a PCI-e device. As shown in FIG. 1 , the method includes the following steps:

Step 101: The parent process monitoring module determines whether the child process exits abnormally according to the exit signal sent by the operating system kernel. The PCI-e device data transmission program runs in the child process, and the PCI-e device data transmission program is the same as that of all the child processes. PCI-e device association described above.

After the parent process monitoring module receives the exit signal sent by the operating system kernel, it 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 will correspondingly generate exit signals with different identifiers according to different exit reasons when the child process exits, therefore, after the operating system kernel sends the exit signal to the parent process monitoring module, the parent process monitoring module can According to the identifier carried in the exit signal, the reason for the exit of the child process is determined, and then it can be judged whether the child process exits abnormally according to the reason for the exit of the child process.

It should be noted that the child process usually runs a PCI-e device transmission data program. Through the PCI-e device transmission data program, other devices can directly write the transmitted data into the memory address corresponding to the registered memory address in the PCI-e device. In the memory, or other devices can directly read the data stored in the memory corresponding to the memory address registered in the PCI-e device, and when the child process exits abnormally, it corresponds to the abnormality of the PCI-e device transmission data program.

It should be noted that the above-mentioned PCI-e device transmission data program is associated with the PCI-e device, that is, when other devices write data through the PCI-e device transmission data program, the PCI-e device transmission data program directly Write to the memory corresponding to the memory address registered in its associated PCI-e device; when other devices read data through the PCI-e device transfer data program, the PCI-e device transfer data program directly from the PCI associated with itself. -e Read data from the memory corresponding to the memory address registered in the device.

Before executing step 101, the parent process monitoring module also needs to create a communication pipeline between itself and the child process, and create a child process; and load the above-mentioned PCI-e device transmission data program in the child process. Thus, the parent process monitoring module can communicate with the child process through the communication channel, and accordingly, the parent process monitoring module can monitor the data transmission program of the PCI-e device running in the child process through the communication pipeline. When the child process exits, that is, When the PCI-e device data transmission program ends, the operating system kernel can send an exit signal to the parent process monitoring module through the communication channel.

Optionally, the processing system may further include a PCI-e device data transmission program module, and the PCI-e device data transmission program module can complete initialization in the PCI-e device, successfully apply for memory in the user space, and register the memory address. After entering the PCI-e device, inform the above-mentioned 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, inform the parent process monitoring module of the data transfer program associated with the PCI-e device. The device number of the PCI-e device and the memory address registered in the PCI-e device, so that the parent process monitoring module can do the finishing work when an abnormality occurs in the data transmission program of the PCI-e device according to the information.

Step 102: In the case that the child process exits abnormally, the parent process monitoring module deregisters the PCI-e device according to the device number of the PCI-e device and the memory address registered in the PCI-e device The memory address registered in .

When the parent process monitoring module determines that the child process exits abnormally according to the exit signal sent by the child process, that is, when it is determined that the PCI-e device running in the child process transmits data program abnormally, the parent process monitoring module determines that the PCI-e device running in the child process ends abnormally. The device number of the e device and the memory address registered in the PCI-e device, and deregister the memory address registered in the PCI-e device.

It should be understood that when the PCI-e device transmission data program module starts itself, it will inform the parent process monitoring module of the device number of the PCI-e device associated with itself and the memory address registered in the PCI-e device. Therefore, the parent process monitors When the module module determines that the child process exits abnormally, it can first determine the PCI-e device transmission data program running in the child process, and then, according to the device number of the PCI-e device associated with the PCI-e device transmission data program. And the memory address registered in the PCI-e device, find the corresponding PCI-e device, and cancel the memory address registered in the PCI-e device, and do the finishing work.

In the case of abnormal exit of the child process, the parent process monitoring module can also record the relevant log of the abnormal exit of the child process. The staff will then maintain the data transmission program of the PCI-e device based on the content of the log, and analyze the cause of the abnormality.

It should be noted that the above-mentioned parent process monitoring module usually works cyclically, that is, when it is determined that the child process exits abnormally, and the memory address registered in the PCI-e device is cancelled, the parent process monitoring module will restart and recreate the connection between itself and the child process. Communication pipeline and sub-process, then load the PCI-e device transmission data program in the created sub-process, receive the device number of the PCI-e device associated with the PCI-e device transmission data program module and register in the PCI-e device When the abnormal exit of the child process is detected again, the memory address registered in the PCI-e device is cancelled, and the child process is closed, and so on.

Due to the randomness of the conditions that trigger the abnormal end of the data transmission program of the PCI-e device, that is, the data transmission program of the PCI-e device may end abnormally due to a specific reason during a certain running process, but the PCI-e device The data transmission program does not end abnormally in each running process. Therefore, once the PCI-e device transmission data program ends abnormally, the parent process monitoring module works cyclically, and the PCI-e device can also be restarted. The device transmits data program.

In the above processing method in case of abnormal program, the parent process monitoring module can timely cancel the memory registered in the PCI-e device associated with the data transmission program of the PCI-e device in the case of judging that the data transmission program of the PCI-e device is abnormal In addition, it can avoid memory read and write errors caused by the use of invalid memory addresses for read and write operations by the PCI-e device data transmission program, and prevent the impact on the operating system and other programs, thereby reducing the harm caused by program exceptions.

In addition, the present application also provides a processing device under abnormal program conditions. Referring to FIG. 2, FIG. 2 is a schematic structural diagram of the processing apparatus 200 under the abnormal program condition. The processing apparatus 200 under the abnormal program condition includes:

The judgment module 201 is used for judging whether the child process exits abnormally according to the exit signal sent by the operating system kernel. e device association;

The processing module 202 is configured to cancel the registered memory address 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 when the child process exits abnormally. memory address.

Optionally, the device further includes:

a notification module, used to notify the parent process monitoring module of the PCI after the PCI-e device completes initialization, and after the user space successfully applies for memory and registers the memory address of the memory to the PCI-e device -e device number of the device and the memory address registered in said PCI-e device.

Optionally, the device further includes:

A creation module is used to create a communication pipeline between the parent process and the child process, and to create the child process;

A loading module, configured to load the PCI-e device data transmission program in the sub-process.

Optionally, the device further includes:

The recording module is configured to record a log when the subprocess exits abnormally.

In the above-mentioned processing device in the case of program abnormality, in the case of judging that the PCI-e device data transmission program is abnormal, the memory address registered in the PCI-e device associated with the PCI-e device data transmission program can be cancelled in time, and then, Avoid memory read and write errors caused by PCI-e device data transmission programs using invalid memory addresses for read and write operations, prevent the impact on the operating system and other programs, and reduce the harm caused by program exceptions.

It should be noted that each embodiment in this specification is described in a progressive manner, and the same and similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. place. In particular, for the device and system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and reference may be made to some descriptions of the method embodiments for related parts. The device and system embodiments described above are only illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in One place, or it can be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Substitutions should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (7)

1. a processing method under abnormal program situation, is characterized in that, is applied to processing system, and described processing system comprises parent process monitoring module, PCI-e equipment and PCI-e equipment transmission data program module; Described method comprises: The parent process monitoring module judges whether the child process exits abnormally according to the exit signal sent by the operating system kernel. e device association; In the case that the child process exits abnormally, the parent process monitoring module cancels the registered memory address 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. memory address; The PCI-e device completes initialization, and after the user space successfully applies for memory and registers the memory address of the memory to the PCI-e device, the PCI-e device transmission data program module informs the parent process to monitor The module includes the device number of the PCI-e device and the memory address registered in the PCI-e device. 2. The method according to claim 1, wherein the method further comprises: The parent process monitoring module creates a communication pipeline between itself and the child process, and creates the child process; The parent process monitoring module loads the PCI-e device data transmission program in the child process. 3. The method according to claim 1, wherein the method further comprises: When the child process exits abnormally, the parent process monitoring module records a log. 4. The method according to claim 1, wherein the parent process monitoring module works cyclically. 5. A processing device under abnormal program conditions, comprising: The judgment module is used to judge whether the child process exits abnormally according to the exit signal sent by the operating system kernel, and the PCI-e device data transmission program is run in the child process, and the PCI-e device data transmission program and the PCI-e device are used to transmit data. device association; A processing module, configured to cancel the memory 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 when the sub-process exits abnormally address; The notification module is used to notify the parent process monitoring module of the PCI-e after the PCI-e device completes initialization, and after the user space successfully applies for memory and registers the memory address of the memory to the PCI-e device The device number of the device and the memory address registered in the PCI-e device. 6. The apparatus according to claim 5, wherein the apparatus further comprises: A creation module is used to create a communication pipeline between the parent process and the child process, and to create the child process; A loading module, configured to load the PCI-e device data transmission program in the sub-process. 7. The apparatus of claim 5, wherein the apparatus further comprises: The recording module is configured to record a log when the subprocess exits abnormally.

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