JPH03175549A - Detection of memory mis-assignment of data - Google Patents

Abstract

PURPOSE:To check memory mis-assignment of data throughout without taking time by using a program to detect the memory mis-assignment of data. CONSTITUTION:The program which is stored in a current system memory and detects the memory mis-assignment of data consists of the function which initializes all words in a stand-by system memory, the logical operation function which compares stored contents of a data file read from an external storage device with those of data to be checked, and the display function which stores the address, where the mis-assignment occurs, and displays it after the end of comparison operation, and this program is called by a command form. In this case, all words in the stand-by system memory are initialized, and it is discriminated whether another data is assigned to the address where data in the data file of the external storage device shopuld be stored or not in accordance with the result of the logical operation between this data and data stored in the address of the stand-by system memory of an exchange where this data should be stored. Thus, the memory misassignment of data is checked throughout without taking time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for detecting a memory allocation error of data in a duplex memory of an exchange.

[Conventional technology]

Conventional methods for detecting memory allocation errors for this type of data include loading the data file into a substitute memory as the active system and actually running the switch operation software, and determining from the failures and errors that occur, or checking the address and data. The method was to manually check the data using a list of data files containing the values.

[Problem to be solved by the invention]

The conventional methods for detecting data memory allocation errors described above, both the method using switch operation software and the method of checking the list manually, take time to check, and there is a risk that not all mistakes can be detected, so it is difficult to There is a problem in that there is a risk that a failure may occur when a data file is loaded into the active memory of the internal exchange, impairing the exchange operation.

An object of the present invention is to place a data memory allocation error detection program together with an exchange operation program in the active memory, and to call this data memory allocation error detection program in a command format to first allocate all words in the standby memory. is initialized and performs a logical operation on the data in the data file in the external storage device and the data stored in the address of the standby memory in the exchange where this data is to be stored. To provide a method for detecting data memory allocation errors that can check for data memory allocation errors without wasting time by determining whether other data is also allocated to an address to which data should be allocated. be.

[Means to solve the problem]

The data memory allocation error detection method of the present invention is as follows:
In a method for detecting a memory allocation error of data in a duplicated memory, a memory that is used as a standby system in the duplicated memory that transfers and stores data in a data file stored in an external storage device is provided. A memory initialization means for initializing a memory that is used as a standby system, and a memory initialization means that sequentially compares the storage contents of the initialized memory used as a standby system and the storage contents of the same address as the data in the data file. storage content comparison means; an allocation error address storage unit for storing the address of the memory allocation error detected by the storage content comparison unit; and an allocation error address stored in the allocation error address storage unit after the comparison operation of all addresses is completed This configuration includes display means for displaying the address of the input/output device on the input/output device.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a flow diagram of one embodiment of the present invention.

The data memory allocation error detection program placed in the active system memory compares the initial setting function of all words in the standby system memory with the stored contents of the data file read from the external storage device and checked. It consists of a logical operation function and a display function that stores the address where an assignment error has occurred and displays it after the comparison operation is completed, and is called in the form of a command.

Next, the operation will be explained.

First, in step (hereinafter referred to as S) 1, all words of the memory used as a standby system among the duplicated memories are
Perform initial settings using OJ. Next, in step 82, it is determined whether all data file reading has been completed from the external storage device, and if it has not been completed, data and address information are read in segments from the external storage device in step S3.
The first word of checked data and address information in the segment read in S4 are extracted. Next, in step 85, one word of data in the standby memory corresponding to the value of the address of the memory where the checked object is to be stored is retrieved, and in step S6
Determine whether the value of one word of data retrieved is "O" or not, and if it is "O", it is determined to be normal because it indicates that the data has been read for the first time to the memory address where the checked data is to be stored. be done. In this case, in S7, a logical operation is performed using NAND with the data in the standby memory corresponding to the value of the address of the memory where the checked data and the checked data are to be stored, and in S8, the logical operation is performed on the data as a result of the logical operation. The check data is saved to a standby address in the memory where it is to be stored. After that, in S9, it is determined whether all data in the segment read from the external storage device has been checked, and if not, the next checked word and address information in the segment read in S10 are checked. Then, the process returns to S5 again to retrieve one word of data in the standby memory corresponding to the value of the address of the memory where the checked item is to be stored, and the above-described operation is repeated.

If it is determined in S9 that checking of all data in the read segment has been completed, the process returns to S2 and it is determined whether all data file reading from the external storage device has been completed.

If it is determined in S6 that the value of one word of data in the standby memory corresponding to the value of the address of the memory where the data to be checked is to be stored is not "0", the address of the memory where the data to be checked is to be stored. This indicates that the data has already been read in, so it is judged as abnormal, and in this case, S
At step 12, the address information of the memory where the checked data is to be stored is saved in the work area of the memory allocation error detection software, and then at step 313, the values of all the bits in one word of the checked data are rl" and all bit values are "1".
If not, the process returns to step S7, which is a logical operation using NAND between the data to be checked and the data in the standby memory corresponding to the value of the address of the memory where the data to be checked is to be stored.

As a result of determining whether the values of all bits in one word to be checked are "1" in the above-mentioned 813, if the values of all bits are "1", this data to be checked is stored in S14. The data to be checked is saved at a standby address in the memory to be checked, and the process returns to S9 to determine whether all data in the read segment has been checked.

After repeating the above-mentioned operations, if it is determined in S2 that all data file reading from the external storage device has been completed, the SLL displays the address information of the misassigned address saved in the work area on the input/output device, and all Finish the process.

〔Effect of the invention〕

As explained above, the present invention places a data memory allocation error detection program in the active memory together with a switch operation program, calls this data memory allocation error detection program in command format, and first stores the data memory allocation error detection program in the standby memory. This data is initialized by initializing all words of the data file, and performs a logical operation on the data in the data file in the external storage device and the data stored in the address of the standby memory in the exchange where this data is to be stored. By determining whether other data is also allocated to the address where the data should originally be stored, it is possible to check for memory allocation errors without wasting time.

[Brief explanation of drawings]

FIG. 1 is a flow chart of one embodiment of the present invention.

Claims (1)

[Claims] In the method for detecting a memory allocation error of data in a duplicated memory, the above-mentioned method 2 transfers and stores data in a data file stored in an external storage device.
A memory initial setting means for initializing a memory used as a standby system among the duplicated memories, and a storage content of the initialized memory used as a standby system and data in the data file. storage content comparison means for sequentially comparing the storage contents of the same address of the memory content comparison means; misallocation address storage means for storing the address of the memory allocation error detected by the storage content comparison means; and completion of the comparison operation for all addresses. 1. A method for detecting a memory allocation error of data, further comprising display means for displaying an address of an allocation error stored in the address storage means of an allocation error on an input/output device.