JPS6362040A - Control system for abnormality ending process - Google Patents

Abstract

PURPOSE:To minimize the influence of abnormality by separating a faulty function unit block only in case the abnormality ending process may possibly repeated endlessly when said unit block has a normality in an abnormality ending process mode. CONSTITUTION:A control program for abnormality ending process is divided by functions and stored in plural function unit blocks 3. When the abnormality occurs during execution of a relevant program, those control programs stored in blocks 3 are successively executed. In this case, the contents of the corresponding factor code area 5 are first checked and the abnormality factor code of this time is added to the area 5 as long as no coincidence is obtained between the checked contents of the area 5 and the abnormality code of this time. Then the control program is carried out after +1 is given to a counter 4. If the abnormality having the same factor code occurs during execution of the control program, the processing is carried out again at and after the head program. In this case, however, the execution of the relevant control program is omitted since the same factor code is already returned into the area 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control method for abnormal termination processing in a control program that processes abnormal termination of a user's problem program executed in a computer.

[Conventional technology]

FIG. 3 is a configuration diagram of a main storage device in a conventional control system for abnormal program termination processing. This main memory is connected to a CPU provided in a general computer system, and stores a control program for supervising the overall operating state and a user problem (processing) program.

Regarding the control programs in this main storage device, 6 is an initial setting section, which stores an initial setting control program that is executed immediately before the problem (processing) program starts execution. Reference numeral 7 denotes an abnormal termination processing section, which stores an interrupt control program to be executed when an abnormality occurs in the problem (processing) program.

The abnormal termination processing section 7 is composed of a functional unit block 8 divided into several functional unit program sections. Further, there is a flag 9 consisting of a 1-bit storage area corresponding to each functional unit block 8.

Next, the operation will be explained. Immediately before the execution of the problem (processing) program starts, the initial setting unit 6 takes control over the CPU and sets all flags 9 to 0 during this period.
Initialize to . The problem (processing) program then takes control of the CPU and executes the problem (processing) program's instructions to do some work. Next, when an abnormality occurs in the problem program, the abnormal termination processing section 7 takes control, and during this period, all the functional unit blocks 8 are executed in sequence.

FIG. 4 is a flowchart showing the operation of one functional unit block 8. First, in step T1, the contents of the flag 9 corresponding to the corresponding functional unit block 8 are checked.

If the content of flag 9 is 0, flag 9 is set in step T2.
is set to 1, and then, in step T3, a control program having a function corresponding to the corresponding functional unit block 8 is executed.

At step T4, the flag 9 is set to 0 at the end of the process. Therefore, if an abnormality occurs during the execution of the control program in the corresponding functional unit block 8, the abnormal termination processing section 7
The program returns to the beginning and starts execution again. When the execution reaches the corresponding functional unit block 8, the content of the corresponding flag 9 is 1, so the execution of the control program having the function corresponding to the corresponding functional unit block 8 is bypassed (step T
1 branch), proceed to the next functional unit block 8. this is,
This is because an abnormality often occurs again when the corresponding control program is executed. This operation prevents the execution of the abnormal termination processing section 7 from being repeated indefinitely.

[Problem that the invention seeks to solve]

Conventional program abnormal termination processing control methods are configured to take a detour once an abnormality occurs in the - functional unit block 8, so that errors caused by hardware failures, other programs in a multi-program environment, etc. Even in the case of a temporary abnormality, the corresponding functional unit block 8 is regarded as defective and is not reused. For this reason, there is a problem in that the abnormal termination processing is insufficient, and if an abnormality occurs in another functional unit block 8, the number of unusable blocks increases and the influence of the abnormality becomes larger.

This invention was made to solve the above problems. Even if an error occurs in a certain functional unit block during abnormal termination processing, the relevant functional unit block is reused, and the abnormal termination processing is infinite. An object of the present invention is to obtain a control method for abnormal termination processing that can minimize the spread of the influence of an abnormality by separating the relevant functional unit block only when there is a possibility that the block will be repeated.

[Means for solving problems]

The control method for abnormal termination processing in this invention is such that the control program for abnormal termination processing is divided by function and stored in a plurality of functional unit blocks 3, and a counter 4 provided corresponding to this functional unit block 3 is recorded as the number of execution times. and store cause codes for abnormal termination in multiple cause code areas 5 provided corresponding to the functional unit blocks 3, and if an abnormality occurs during execution of the control program in the functional unit block 3, , re-execution of the control program is determined based on the contents of the cause code storage area 5.

[Effect]

If an error occurs while sequentially executing the control programs in the functional unit block 3, a code indicating the cause of the error is stored in the cause code area 5 of the corresponding functional unit block 3 for the number of times the error occurs, and the code indicating the cause of the error is stored in the cause code area 5 of the corresponding functional unit block 3. This is referred to as a criterion for determining whether a program can be re-executed. In this way, there is a possibility that a control program in which an error has occurred may be reused.
Try to minimize the spread of the effects of abnormalities.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a configuration diagram of a main storage device in a control system for abnormal program termination processing according to the present invention. This main memory is connected to a CPU provided in a general computer system, and stores a control program that supervises the overall operating state and a user problem (processing) program.

Regarding the control programs in the main storage device, reference numeral 1 denotes an initial setting section, which stores an initial setting control program that is executed immediately before the problem (processing) program starts execution. 2, the abnormal termination processing section 2 is composed of a functional unit block 3 divided into several functional unit program sections. Further, there is one counter 4 corresponding to each functional unit block 3, and a cause code area 5 capable of storing a plurality of cause codes corresponding to each functional unit block 3.

Next, the operation of the embodiment will be explained. Immediately before the execution of the problem program starts, the initial setting unit 1 takes control of the CPU and sets all counters 4 to 0 during this period.
to clear all cause code areas 5.

The problem (processing) program then takes control of the CPU and executes the instructions of the problem (processing) program to do some work. Next, when an abnormality occurs in the problem program, the abnormal termination processing section 2 takes control, and during this period, all the functional unit blocks 3 are executed in sequence.

FIG. 2 is a flowchart showing the operation of one functional unit block 3. First, in step S1, the contents of the cause code area 5 corresponding to the corresponding functional unit block 3 are checked. The number of valid cause codes in cause code area 5 is indicated by the value of counter 4. If there is no one among these valid cause codes that matches the cause code of the abnormality that occurred this time, in step S2, the current abnormality cause code is added to the cause code area 5, and the value of the counter 4 is increased by 1. Then, in step S3, a control program having a function corresponding to the corresponding functional unit block 3 is executed.

If an abnormality having the same cause code occurs during the execution of the control program in the corresponding functional unit block 3, the abnormal termination processing section 2 returns to the beginning and starts execution again. When execution reaches the corresponding functional unit block 3,
This time, since the same cause code is included in the corresponding cause code area 5, the execution of the control program having the function corresponding to the corresponding functional unit block 3 is bypassed (step S1, branch) and the process goes to the next step. move on. This is because an abnormality with the same cause often occurs again when the corresponding control program is executed.

On the other hand, if an abnormality with a different cause code occurs during the execution of the control program in the corresponding functional unit block 3, the process returns to the beginning of the abnormal termination processing section 2 and reaches the corresponding functional unit block 3 again, but the countermeasure is taken in step S1. Since the same cause code is not included in the cause code area 5, the current cause code is added to the cause code area 5, the value of the counter 4 is increased by 1, and in step S3 , execute the corresponding control program.

As described above, if there is no identical cause code, the functional unit block in which the abnormality has occurred is reused, making it possible to minimize the spread of the influence of the abnormality.

In the above example, if the current cause code is included in the cause code area 5, the method of bypassing the execution of the control program of the corresponding functional unit block has been shown. Even if the cause food is included in cause code area 5, if the number is less than the allowable overlap value,
[Effect of the invention] A control program for abnormal termination processing is divided by function and stored in a plurality of functional unit blocks, and a program is created corresponding to the functional unit block. The number of executions is stored in the counter
In addition, the cause code for the abnormal termination is stored in multiple cause code areas provided corresponding to the functional unit block, and if an abnormality occurs during the execution of the control program in the functional unit block, the control program is re-executed. Since this is determined based on the contents of the cause code storage area, it is possible to identify not only the location of the functional unit block in which the abnormality occurred during the abnormal termination processing but also the cause code of its contents. Therefore, it is possible to distinguish and handle temporary abnormalities caused by factors such as hardware failures or other programs in a multi-program environment, and permanent abnormalities that cause an infinite loop, thereby minimizing the spread of the influence of abnormalities. It has the effect of staying in place.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a main storage device in a control method for abnormal program termination processing according to an embodiment of the present invention, and FIG. 2 is a flowchart showing the operation of a control method for abnormal program termination processing according to an embodiment of the present invention. FIG. 3 is a configuration diagram of a main storage device in a conventional control method for abnormal program termination processing, and FIG. 4 is a flowchart showing the operation of the conventional control method for abnormal program termination processing. 1... Initial setting section, 2... Abnormal termination processing section, 3...
-Functional unit block, 4...Counter, 5...Cause code area.

Claims (1)

[Claims] In a control method for abnormal termination processing of a problem program executed in a computer system, the control program for abnormal termination processing is divided by function and stored in multiple functional unit blocks, and a counter provided corresponding to this functional unit block is The number of executions is memorized, and the cause code for the abnormal termination is stored in multiple cause code areas provided corresponding to the functional unit block, and if an abnormality occurs during the execution of the control program in the functional unit block, . A control method for abnormal termination processing, wherein re-execution of the control program is determined based on the contents of the cause code storage area.