JPH0235341B2 - - Google Patents

Description

[Detailed Description of the Invention] (A) Technical Field of the Invention The present invention relates to a method for restoring stored information, especially for program testing and debugging of programs, programs and data on a main storage device, or data on a magnetic disk. The present invention relates to a storage information restoration processing method that allows the changed storage contents to be easily returned to their original state after a test has been completed.

(B) Prior Art and Problems In data processing systems, sufficient time is spent in order to improve the reliability of the system, especially testing newly developed programs. When testing a program, in order to prepare the test environment, storage information related to the test is required, such as changing part of the program, changing the contents of files that serve as input information for the program, and changing the control table used to control program execution. changes are required. The same applies when an abnormality occurs in the operation of a program during actual operation, and the problem is debugged.

Conventionally, in order to change the various types of memory information mentioned above, for example, an ALT (alternate) command was prepared.
By specifying the storage address to be changed and new data using the command, the contents of memory, programs, files, magnetic disk media, etc. can be changed to desired contents. However, according to the conventional method, the memory content is simply rewritten to the specified data, so when the test is finished and it is necessary to return to the original state, for example, the changed memory address must be rewritten. The original data had to be re-entered using the above ALT command.

Therefore, it is necessary for humans to memorize or record the changed information, and in cases where the memorized information is complexly changed or a series of tests are conducted over several days, the recorded notes may be There has been a problem in that it may not be possible to restore the original state due to reasons such as data being lost or the original data being forgotten. Additionally, there was a risk that the data would not be restored correctly due to recording errors or operational errors.

(C) Object and Structure of the Invention The present invention aims to solve the above-mentioned problems, and provides a means for easily and reliably restoring the stored information to its original state when the stored information is changed. It is an object. Therefore, in the storage information restoration processing method of the present invention, in a data processing device that has a command processing function to change storage information in a main storage device or a direct access device to specified data, the command to change the storage information is , and in response to input of the command, save information including at least the identification information, the location information of the storage information to be changed, and the storage information before the change at the storage location is stored. a memory changing unit that writes the saved information to the history storage unit and changes the stored information in response to the command; and a memory modification unit that writes the saved information to the history storage unit and changes the stored information in response to the command, and the history storage unit that responds to a request to restore stored information that specifies the identification information. The present invention is characterized by comprising a memory restoring unit that refers to the saved information and restores the stored information to its original state based on the saved information having matching identification information. This will be explained below with reference to the drawings.

(D) Embodiment of the Invention FIG. 1 shows the configuration of an embodiment of the invention, and FIG. 2 shows an example of commands for changing and restoring stored information according to the invention.

In the figure, 1 is a data processing device, 2 is an operator
Console, 3 is a command input section, 4 is a command analysis section, 5 is a memory modification section, 6 is a history output section, 7 is a memory restoration section, 8 is a history input section, 9 is a history file, 10 is a main storage device, 11 is the program, 12
13 represents a file, and 13 represents a magnetic disk pack.

The data processing device 1 is a device that sequentially fetches and executes instructions prepared in advance on a main memory. The operator console 2 is, for example, a display keyboard, which allows the operator to give various instructions to the system by pressing predetermined keys. This instruction to the system is called a command. The command input unit 3 is used to input from the operator console 2 a command for changing or restoring stored information, which will be described later with particular reference to FIG. The command input by the command input section 3 is transmitted to the command analysis section 4. The command analysis unit 4 analyzes the syntax of a command, determines the command type, and extracts parameters. If the command instructs to change the stored information, it starts the memory changing section 5, and if the command instructs to return the previously changed stored information to its original state,
Start the memory restoration section 7.

The memory changing unit 5 changes the storage information at the address specified by the parameter to the data specified by the parameter in accordance with the command type.
The objects to be changed include, for example, the main storage device 10, programs 11, files 12, magnetic disk packs 13, etc. As the address of the main storage device 10, for example, a logical address or a real address is used. As the address of the program 11, a relative address from the beginning of the program 11 is used. The file 12 is provided on, for example, a magnetic disk pack, and a relative block number or the like is used as position information when changing the file. Positional information regarding the magnetic disk pack 13 includes cylinder numbers, head numbers, record numbers, displacements within records, and the like. Furthermore, the memory change unit 5 activates the history output unit 6. The history output unit 6 outputs a history file 9 prepared in advance by the system.
The information regarding the storage information changed by the storage changing unit 5 is written into the storage information. As shown in FIG. 1, this information includes, for example, a command type, an identifier, an address, and original data.

The memory restoration unit 7 is activated, for example, when a test or debugging is completed, by inputting a command to restore previously changed memory information. For example, a command requesting information restoration includes an identifier arbitrarily specified at the time of memory modification, and the history input section 8 accesses the history file 9 and stores the corresponding history information using the specified identifier as a key. is extracted. Based on the extracted history information, the main storage device 10,
The stored contents of the program 11, file 12, magnetic disk pack 13, etc. are restored to their original state. Note that the history information used for restoration is deleted from the history file 9.

In the above embodiment, commands in the format shown in FIG. 2 are used, for example. 2
0-1 to 20-4 are commands for instructing to change information. 21-1 to 21-4 are commands for instructing information restoration. The command name "MALT" targets the main storage device 10, and the command name "EALT" targets the program 1.
The command name ``FALT'' targets the file 12, and the command name ``DALT'' targets the magnetic disk pack 13. The parameters of each command 20-1 to 20-4 include the address to be changed and new data as before, and are further given an arbitrarily determined identifier ID regarding the change event. If the identifier does not exist, the same processing as the conventional one is performed, and the saving of information to the history file 9 for restoration is omitted.

Commands 21-1 to 21- to instruct restoration
In step 4, by specifying the above-mentioned identifier ID, the original data of the stored information changed with that identifier ID can be obtained from the history file 9, and restoration is possible.

FIG. 3 shows another embodiment of the present invention, and FIG. 4 shows a third embodiment of the present invention.
3 shows examples of commands associated with the illustrated embodiment; In the figure, numerals 1 to 9 correspond to those in FIG. 1, and 30 represents a timer management section.

Generally, the time required for testing, the running time for debugging, etc. can be roughly known in advance. If the system were to automatically restore stored information that was changed for testing or debugging at the end of testing or debugging, without the operator having to instruct the operator to restore the information, it would be convenient because there would be no need to forget to restore the information. It is. In FIG. 3, the command input section 3 and command analysis section 4 perform processing similar to the example shown in FIG. In particular, in the case of this example,
For example, as shown in FIG. 4, the parameter part of the identifier is given in a special form. Specifically, if the first character of the identifier is a number, it will be interpreted as a request for time specification or time-specific information change and restoration, and in the case of an identifier whose first character is an alphabetic character, the It is interpreted as a processing request as described.

The command 40-1 shown in FIG. 4 specifies the time, and instructs to automatically restore information at 6:00 p.m. command 40
-2 is a time specification, which instructs to restore the information after 120 minutes from the current time.

When the memory change unit 5 receives such a command, it changes the memory information, updates the history file 9 by the history output unit 6, and also updates the history file 9 by the timer management unit 30, as in the case of FIG. to notify the specified time or time. The timer management section 30
The system clock is referenced or a timer interrupt is set to occur after a specified time has elapsed, and the memory restoration unit 7 is activated when the specified time has elapsed. The memory restoration unit 7 refers to the history information in the history file 9 through the history input unit 8, and uses commands 40-1, 40-2, etc. as shown in FIG. The system retrieves the stored data and uses that information to restore the memory contents to the state before the change. Note that the time to be restored can also be uniquely determined by the system.

The invention can be applied, for example, to the embodiment shown in FIG. 1 or to the embodiment shown in FIG.
It is possible to implement only one of the illustrated embodiments, or both together. It is also possible to provide the same support as before when the identifier is omitted in the command parameter.

(E) Effects of the Invention As explained above, according to the present invention, even if various types of stored information are frequently changed when debugging a program, for example, there is no need to record the original information, etc. It can be easily restored to its original state. That is, it is possible to prevent operational errors that may cause system abnormalities due to forgetting to restore stored information. In particular, by using a common identifier for multiple stored information change commands, it is possible to perform restoration with a single restoration command, and by specifying a time, etc.
Automatic restoration is also possible.

[Brief explanation of drawings]

FIG. 1 shows the configuration of one embodiment of the present invention, FIG. 2 shows an example of commands for changing and restoring stored information according to the present invention, FIG. 3 shows another embodiment of the present invention, and FIG. 4 shows the configuration of a third embodiment of the present invention. 3 shows examples of commands associated with the illustrated embodiment; In the figure, 1 is a data processing device, 4 is a command analysis section, 5 is a memory modification section, 7 is a memory restoration section, and 9 is a history file.

Claims (1)

[Scope of Claims] 1. In a data processing device having a command processing function for changing storage information of a main storage device or a direct access device to specified data, the command for changing the storage information is an identification related to the change of the storage information. a history memory configured to add information, and storing evacuation information including at least the identification information, location information of the storage information to be changed, and storage information before the change at the storage location in response to input of the command; a memory modification unit that writes the saved information to the history storage unit and changes the stored information in response to the command; A storage information restoration processing method comprising: a storage restoration unit that restores the storage information to its original state based on the saved information having matching identification information.