JPH0651996A - Information processor - Google Patents

Abstract

PURPOSE:To provide an information processor capable of protecting data in each application program when a fault occurs in the application program being operated on multithread environment. CONSTITUTION:A data protection function which requires the protection of an application program group 1 is registered on a data protection function string storage means 3 by a function registration and deletion means 2. When the fault in the application program is detected by a fault detecting means 4, a function string readout control means 5 executes by reading out the data protection function from the data protection function string storage means 3 sequentially. As a result, each protection data can be transferred to a protection data storage means 6, then, it is preserved. Thereby, it is possible to protect the protection data of each application program.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing device,
In particular, the present invention relates to an information processing apparatus capable of protecting data of individual application programs when some failure occurs when a plurality of application programs operate in a multi-thread environment.

[0002]

2. Description of the Related Art Conventionally, various measures have been taken with respect to failure recovery when a program fails.

For example, in the invention disclosed in Japanese Patent Application Laid-Open No. 2-171833, a child task that performs a task and a parent task that monitors this child task are prepared in a virtual space, and a child task is caused by a program failure. When a task ends abnormally, a measure is proposed in which the parent task regenerates the child task without stopping the virtual space.

Further, in Japanese Patent Publication No. 61-61431, when a program abnormality occurs, the type of the abnormality is registered, and each time the abnormality occurs, whether the abnormality is already registered or unregistered. If it is already registered, the stored contents are updated, if it is not registered, the abnormal type is newly registered, and when the number of registered types exceeds a predetermined number, it is treated as a program abnormality for the first time. Measures to stop the operation have been proposed.

Generally, in a system in which a plurality of application programs operate independently without sharing a storage space, even if a certain application program fails or the application program terminates abnormally, other application programs Is not particularly harmed if it does not share resources with its process.

[0006]

However, when a plurality of application programs are operating in an environment in which a plurality of threads operate by sharing a storage space, that is, in a multi-thread environment, a failure occurs in an application program. If this occurs or the application program terminates abnormally, there is a problem that the data of other application programs may be destroyed.

An object of the present invention is to eliminate the above-mentioned problems of the prior art and to protect the data of each application program when a failure occurs in the application program operating in a multi-thread environment. It is to provide a processing device.

[0008]

In order to achieve the above object, the present invention provides a data protection function string storage means for storing a data protection function added to each application program when a failure occurs, and the data protection function. Function registration means for registering a data protection function in the column storage means, detection means for detecting a failure occurrence, function string reading means for reading out the data protection function registered by the registration means when a failure occurs, and the function It is characterized in that a protection data storage means for storing protection data based on the data protection function read by the column reading means is provided.

[0009]

According to the present invention, when the detecting means detects a failure, the function sequence reading means is activated. The function string reading means reads the data protection function registered in the function registration means, executes the data protection function, and stores the protected data in the protected data storage means.

By the above operation, since all the protected data are stored in the protected data storage means when a failure occurs, there is no fear that the protected data will be destroyed, and highly reliable data protection can be realized. .

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing the basic configuration of the present invention.

In the figure, reference numeral 1 denotes an application program group, which is stored in, for example, a virtual memory VM. 2 is owned by each application program,
It is a function registering and erasing means for registering a function for performing its own necessary data protection in the data protection function sequence storage device 3 or deleting it from the data protection function sequence storage device 3. Note that this deletion is performed, for example, when the application program is unloaded from the virtual memory VM and data protection is no longer required.

Numeral 4 is a failure detecting means for detecting a failure during the operation of the application program. When the failure is detected, the function string reading means 5 is activated. The function string reading means 5 has the function of reading the data protection function string from the data protection function string storage device 3, executing it, and saving the protected data in the protected data storage device 6.

As the application program stored in the virtual memory VM, for example, a program including functions a, b, ..., A as shown in FIG. 2 can be assumed. Here, for example, if the function A is a function requiring data protection, that is, a data protection function, the function A is the function registration and deletion means 2.
As a result, the data protection function sequence storage device 3 is registered.

Here, the function registration and deletion means 2
Performs the operation shown in the flowchart of FIG.

That is, it is judged whether the data protection function is registered or deletion is requested (step S
1) If the request is for registration, the operation of registering the function is performed (step S2), and if the request is for deletion, the operation of deleting the function is performed (step S3).

When registering, the program may be described as follows, for example.

Call Register Func [A] Next, in the data protection function sequence storage device 3, the function is
As shown in FIG. 4, it is registered in the form of a list.
In the figure, 10 is a head item reference (head item pointer), and 11, 12 and 13 are registered function lists. Further, 11a, 11b and 11c are data protection functions referred to by the function reference of the registration function lists 11, 12 and 13, respectively.

For example, if there are three registered data protection functions A, B, and C, the head term reference element 10
The head registration function list 11 is located at the position pointed to by, and the data protection function A is referenced by the function reference of the registration function list 11.

The registered function list 12 is located at the position indicated by the next item reference of the head registered function list 11, and the data protection function B is referred to by the function reference of the registered function list 12.

Similarly, the registered function list 13 is at the position indicated by the next term reference of the registered function list 12, and the data protection function C is referred to by the function reference of the registered function list 13.

Assuming that the data protection function C is the last function registered in the data protection function string storage device 3, the registered function list 14 located at the position indicated by the reference item in the next item of the registered function list 13. Is empty.

When a new data protection function D is registered in the data protection function sequence having the above list structure, the function D is registered in the empty registration function list 14.

On the other hand, when deleting the registered function list 12 from the data protection function string storage device 3, for example, the next term referencer of the registered function list 11 is designated so as to point to the registered function list 13. You can change it.

Next, the processing of the fault detecting means 4 will be described with reference to FIG.
This will be described with reference to the flowchart in FIG. Now, assuming that the failure detection means 4 has detected a failure (Yes in step S4), the function string read control means 5 is activated. (Step S5) Next, the operation of the function string read control means 5 will be described with reference to FIG.
This will be described with reference to the flowchart in FIG.

Now, assuming that the head registration function list is P (step S11), it is determined in step S12 whether or not the P is empty. If not empty, step S1
In step 3, the function referred to by the function reference in the head registration function list is executed. By this execution, the protected data A is transferred from the data protection function sequence storage device 3 to the protected data storage device 6 and saved.

When the processing of step S13 is completed, the process proceeds to step S14, and the next term registration function list is selected.
Next, in step S12, it is determined whether or not the registered function list is empty. If it is not empty, the process proceeds to step S13, and the same processing as described above is continued. on the other hand,
If it is empty, it means that all the protected data has been transferred to the protected data storage device 6 and has been protected, so the processing ends.

As described above, according to this embodiment, when a failure occurs in the application program operating on the multi-thread or the application program terminates abnormally, this failure or abnormality is detected by the failure detection means. Is detected and the function string read control means saves the protected data of each application program in the protected data storage device, so that the protected data can be prevented from being destroyed.

[0029]

According to the present invention, when a plurality of application programs operate in a multi-thread environment, the protection data required by each application program can be protected flexibly and finely, and the reliability can be improved. This has the effect of achieving high data protection.

Further, since the data protection function can be dynamically added or deleted, it is possible to flexibly deal with the addition and deletion of the application program.

Furthermore, since each application program can protect only the necessary data, the capacity of the data protection function sequence storage device and the protection data storage device can be minimized.

[Brief description of drawings]

FIG. 1 is a block diagram showing functions of an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a structure of an application program.

FIG. 3 is a flowchart illustrating the operation of function registration and deletion means.

FIG. 4 is a diagram illustrating a data structure of a data protection function sequence stored in a data protection function sequence storage unit.

FIG. 5 is a flowchart for explaining the operation of the failure detection means.

FIG. 6 is a flowchart illustrating an operation of a function string read control unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Application program group, 2 ... Function registration and deletion means, 3 ... Data protection function sequence storage means, 4 ... Fault detection means, 5 ... Function sequence read control means, 6 ... Protected data storage means

Claims (2)

[Claims] 1. In an information processing apparatus in which a plurality of application programs operate in an environment in which a plurality of threads share a storage space and operate, a data protection function at the time of failure added to each application program is stored. Data protection function string storage means, function registration means for registering a data protection function in the data protection function string storage means, detection means for detecting the occurrence of a failure, and data protection registered by the registration means when a failure occurs An information processing apparatus comprising: a function string reading unit for reading a function; and a protected data storage unit for storing protected data based on the data protection function read by the function string reading unit. 2. The information processing apparatus according to claim 1, further comprising a deregistration unit that deregisters the data protection function of the data protection function string storage unit.