JPS6272040A - Information tracing system - Google Patents

Abstract

PURPOSE:To facilitate the investigation of the cause of trouble by writing infor mation on data transfer between tasks every time data is transmitted forth and back to a trace area between the tasks. CONSTITUTION:A task B requests a subroutine 5 to receive data on a data reception side with an instruction (RCV1). The subroutine 5 reports data reception to a control program 18 with an instruction (RCV2) and then enters a wait state with an instruction (WAIT). A control program 18, on the other hand, reports an address Z of a cell area 9 to the subroutine 5. The subroutine 5 copies data (a, b, d) in the cell area 9 to a data area 7 with an instruction (COPY2) and then writes the data in the cell area 9 to the trace area 10 with an instruction (TRACE2). Then, the subroutine 5 requests the releasing of the cell area 9 with an instruction (CELL CL). Thus, when the data (d) is transferred between tasks A and B, information on the transfer is stored in the trace area 10.

Description

[Detailed Description of the Invention] [Summary] A plurality of processing tasks (TASK) operating on a terminal, etc.
) When data is exchanged between the two systems, information related to the data exchange is recorded in a predetermined area, and when a fault is placed, this recorded information facilitates the investigation of the cause.

(Industrial Application Field) The present invention relates to an improvement in the information I[11-race method] for recording information when data is exchanged between a plurality of processing tasks.

In a terminal device or the like that performs transmission/reception control through the operation of a plurality of processing tasks, a countermeasure is desired that facilitates quick investigation of the cause when a failure occurs regarding data exchange performed between tasks.

[Conventional technology]

A conventional example will be explained using figures. FIG. 3 is a block diagram illustrating a conventional example.

FIG. 3 shows an example of a terminal equipped with a processing device 1, in which, for example, reception processing related to data D received by the line section 2 and stored in the buffer 3 is performed by each processing program in the main memory 4. Process. Note that each processing program operates as a task.

Therefore, in the process of processing, data is often transferred from one task (for example, task A) to another task (for example, task B), that is, data transfer processing (inter-task communication) is often performed. Task A requests the inter-task communication subroutine 5 to transfer data, and task B also requests the inter-task communication subroutine 5 to receive the data.
request. That is, data exchange between tasks is performed via the intertask communication subroutine 5, and data d in the data area 6 for task A is transferred to the data area 7 for task B.

There are as many tasks A and B as described above depending on the processing content, and data transmission and reception via the line 8 is processed by frequent inter-task communication between these tasks.

Note that the inter-task communication subroutine 5 and the processing tasks A and B both operate under the control of the control program 18.

[Problem that the invention seeks to solve]

As is clear from the above, when inter-task communication is performed in a terminal device that has a built-in processing unit and performs data transmission and reception processing under program control, no record of information related to the inter-task communication is left. There is a problem in that when an abnormality occurs in data transmission and reception via a line, it becomes difficult to find the cause.

Means for Solving Problem C] Figure 2 is a block diagram of the principle of the present invention. The invention provides processing tasks 1m operating under the control of a control program 18.
It has a processing task 12 and a subroutine 5, and the subroutine 5 responds to the requests of the two processing tasks 11 and 12,
In the processing nostem that controls data transfer between processing tasks, the data area 6 used by processing task 11 and the processing task 1
2, a data area 7, a cell area 9, and a trace area 10; and area setting notification means 14 for setting the cell area 9 and notifying the control program 18 of the address 13 of the cell area;
A writing means 16 that copies the information in the data area 6 to the cell area 9 and writes the information in the cell area 9 to the trace area 10 after receiving the address 13 and the information in the cell area 9 as data. The subroutine 5 includes a copy means 17 for copying to the area 7.

[Effect]

When the processing tasks 11 and 12 request the subroutine 5 to transfer data, the subroutine 5 sets the cell area 9 and then transfers the information in the data area 6 to the data area 7 using the cell area 9 as a buffer. At this time, information in the cell area 9 is written into the trace area 10.

〔Example〕

Hereinafter, the present invention will be explained with reference to the drawings. FIG. 2 is a block diagram illustrating an embodiment of the present invention.

The embodiment shown in FIG. 2 has two processing tasks (hereinafter referred to as tasks) A and B, and is an example in which data is transferred from a data area 6 for task A to a data area 7 for task B. .

(2) Task A requests the inter-task communication subroutine (hereinafter referred to as subroutine) 5 to transfer data in the data area 6 by a command (SEND). Furthermore, data area 6
, the number a of the self-task A, the number of the destination task B, and data d are stored.

■Subroutine 5 corresponding to this is a command (under CAR). A 5EF), the cell area 9 is set.

0 Next, subroutine 5 executes the command (COPY) by
The data (a, b, and d) in data area 6 are transferred to cell area 9.
Copy it to

■ Subroutine 5 transfers information (a, b, and d) in cell area 9 to trace area 1 by command (TRACE).
Write to 0.

(2) The subroutine 5 notifies the control program 18 of the address Z of the cell area 9 by a command (CAD Z).

On the other hand, on the data receiving side, (1) Task B requests subroutine 5 to receive data by command (RCV,).

■The subroutine 5 notifies the control program 18 of data reception by the command (RCV,), and then the command (WAI).
T) enters the wait state. In response, the control program 18 notifies the subroutine 5 of the address Z of the cell area 9.

(2) Along with this, the subroutine 5 copies the data (a, b, and d) in the cell area 9 to the data area 7 by the command (COPY).

Next, the subroutine 5 writes the data in the cell area 9 to the trace area 10 by the command (TRACE).

[Phase] The subroutine 5 requests the control program 18 to release the cell area 10 by a command (CELL CL).

As is clear from the above processing procedure, between tasks (A-B)
When data d is transferred, the corresponding data is stored. Therefore, each time data is exchanged between tasks, information related to it is written in the trace area 10, so if a failure occurs, you can check the trace information in the trace area 10 to determine whether the failure occurred. It becomes easier to pursue the cause.

〔Effect of the invention〕

The present invention has an advantage in that it facilitates finding the cause of a failure that occurs during the processing process.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the principle of the present invention. FIG. 2 is a block diagram explaining an embodiment of the present invention. FIG. 3 is a block diagram explaining a conventional example. In the figure, 7 is a data area, 8 is a line, 9 is a cell area, 10 is a trace area, 11.12. A and B are processing tasks, 13 is an address, 14 is an area setting means, 15.degree. 17 is a copying means, 16 is a writing means, and 18 is a control program.

Claims (1)

[Claims] Processing tasks 11 operating under the control of a control program 18
, a processing task 12 and a subroutine 5, in which the subroutine 5 manages data transfer between the processing tasks in response to requests from two processing tasks 11 and 12, comprising: a data area 6 used by the processing task 11; an area setting notification means 14 that provides a data area 7, a cell area 9, and a trace area 10 used by the task 12, and notifies the control program 18 of the address 13 of the cell area after setting the cell area 9;
Copying means 15 copies the information in the data area 6 to the cell area 9, writing means 16 writes the information in the cell area 9 to the trace area 10 after receiving the address 13, and the information in the cell area 9 is copied to the data area 7. The subroutine 5 is provided with a copy means 17 for copying data to the subroutine 5, and when the processing tasks 11 and 12 request the subroutine 5 to transfer data, the subroutine 5 sets the cell area 9 and then transfers the data to the subroutine 5. An information tracing method characterized in that when information in a data area 6 is transferred to a data area 7 as a buffer, information in a cell area 9 is written into a trace area 10.