JPH05334135A - Error information display system for abnormal end of program - Google Patents

Abstract

PURPOSE:To support the quick detection of a cause of abnormal end by including a source line number and a data name causing the abnormal end of a user program in error information. CONSTITUTION:A code map 3 indicates correspondence between the source line address of the user program 2 and an execution address and a data map 4 indicates correspondence between a data name in the program 2 and an address of a storage area allcated at the time of executing the program 2. An exception analyzing means 5 analyzes an exception generated in the program 2, and, when the exception is the cause of abnormal end interrupting the continuation of the program 2, stores an exception generating address and an incorrect data address in a program exception information table 6. At the time of the abnormal end processing of the program 2, a program error information displaying means 7 forms error information including the source line number and the data name by referring to the maps 3, 4 and the table 6 and displays the error information on an error information display device 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of displaying an error message indicating the cause of a program abnormality that occurs during execution of a user program, and more particularly to an error information display method that is output by an operating system when a program abnormally ends.

[0002]

2. Description of the Related Art Conventionally, in this type of error information display method at the time of abnormal termination of a program, the address of the instruction at which the user program abnormally terminated is displayed as the error message display content when the user program abnormally terminates. It was only done. For this reason, it was not possible to determine the statement corresponding to the source line number of which program unit where the exception occurred from the displayed content of the error message.

If the cause of the abnormal termination of the user program is due to the content of the data defined in the user program, the error message will indicate which data name is the cause and what the content is. It was not possible to know from the displayed contents alone.

[0004]

In the above-described conventional error information display method when a program terminates abnormally, the content of the error message displayed when the user program terminates abnormally is the address of the instruction where the user program terminated abnormally. Since it was only displayed, the cause of abnormal termination of the user program could not be immediately investigated from the error message, and the object list, link map, memory dump at the time of abnormal termination of the user program, etc. There was a problem that it was necessary to analyze by.

Further, the analysis requires specialized knowledge, and it is difficult for a general user to easily analyze the analysis. Therefore, there is a problem that it takes time and labor to debug the program.

In view of the above points, an object of the present invention is to include the source line number and the data name that cause the abnormal termination of the user program in the error message displayed when the user program abnormally terminates. An object of the present invention is to provide an error information display method at the time of abnormal termination of a program so as to support early detection of the cause of abnormal termination of a user program.

[0007]

According to the error information display method at the time of abnormal termination of a program of the present invention, the source line number of the user program and the source line number of the user program are used in the error information display method when an abnormality occurs during execution of the user program. In the user program, a code map showing a correspondence with an execution address, a data map showing a correspondence between a data name defined in the user program and an address of a storage area allocated when the program is executed, When an exception occurs, an exception analysis means for analyzing the exception and an exception generation address and an invalid data address when the exception analysis means analyzes the exception as the cause of abnormal termination in which the user program cannot continue. The program exception information table that is stored and the above-mentioned code exception code when the user program is abnormally terminated. Flop, and a program error information display means for creating and displaying error information including the data map and source line number and the data name by referring to the program exception information table.

[0008]

In the error information display method at the abnormal termination of the program of the present invention, the code map shows the correspondence between the source line number of the user program and the execution address, and the data map is the data defined in the user program. The correspondence between the name and the address of the storage area allocated when the program is executed, the exception analysis means analyzes the exception when the exception occurs in the user program, and the program exception information table shows the exception by the exception analysis means. An exception occurrence address and an invalid data address are stored when it is analyzed as the cause of abnormal termination that cannot continue the user program, and the program error information display means stores the code map, the data map, and the program during the abnormal termination process of the user program. Refer to the exception information table and include the source line number and data name. Creates and displays the error information.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an error information display system when a program ends abnormally according to an embodiment of the present invention. The error information display method upon abnormal termination of a program according to the present embodiment includes a process management unit 1 that constitutes a part of the operating system and manages processes, a user program 2 called from the process management unit 1, and a user program. Code map 3 included in 2 and showing the correspondence between the source line number of the user program 2 and the execution address
And a data map 4 showing a correspondence between a data name included in the user program 2 and defined in the user program 2 and an address of a storage area allocated when the user program 2 is executed, and a user program Exception analysis means 5 that is called when an exception occurs in 2 and analyzes the exception
And a program exception information table 6 created by the exception analysis unit 5, a program error information display unit 7 called by the process management unit 1 at the time of abnormal termination of the user program 2, and a program error information display unit 7 The error information display device 8 displays the error information.

Referring to FIG. 2, the code map 3 is composed of a plurality of entries including an address (segment number and relative displacement within a segment), a source line number and a program unit name.

Similarly, referring to FIG. 2, the data map 4 has an address (segment number and relative displacement within a segment), a data name and a data attribute (length and type).
It consists of multiple entries consisting of.

Similarly, referring to FIG. 2, the program exception information table 6 stores an exception occurrence address, an exception type, and an invalid data address.

Similarly, referring to FIG. 2, the error information display device 8 displays an error message including the type of exception, program unit name, source line number, data name and its contents.

Next, the operation of the error information display system at the time of abnormal termination of the program according to the present embodiment thus constructed will be described.

First, the user program 2 in an executable format is called from the process management section 1 which constitutes a part of the operating system.

When an exception occurs due to an illegal operation of the user program 2 during execution of the user program 2, the operating system transfers control to the exception analysis means 5.

The exception analysis means 5 analyzes the exception of the user program 2 and, if the cause of the abnormal termination is that the user program 2 cannot be continued, the instruction that caused the abnormal termination is stored in the program exception information table 6. Execution address (exception occurrence address) and the type of the exception. If an exception occurs because the content of the data name is incorrect, the address in the storage area of the data name (incorrect data address) is written out. , Control is returned to the process management unit 1.

The process management section 1 uses the user program 2
Is abnormally terminated, the program error information display means 7 is called during the abnormal termination processing of the user program 2.

The program error information display means 7 retrieves the exception occurrence address from the program exception information table 6, searches the code map 3 with the exception occurrence address, and searches for the source line number and the program that caused the abnormal termination of the user program 2. Get the unit name. Further, the program error information display means 7 looks at the type of the exception in the program exception information table 6 and, if the exception occurs because the content of the data name is incorrect, the program exception information table 6
The illegal data address is taken out from, the data map 4 is searched by the illegal data address, and the data name and the data attribute are taken out. Next, the program error information display means 7
Creates error information including the type of exception, program unit name, source line number, data name and its contents (value and data attribute) and outputs it to the error information display device 8.

Next, the operation of the error information display system at the time of abnormal program termination of this embodiment will be described in detail with reference to the specific example shown in FIG.

In the MOVE instruction at the source line number 36 of the user program 2 "AP01", if the content of the data name "A" is invalid as a decimal number, a program exception occurs and the operating system analyzes the exception. Pass control to means 5.

The exception analysis means 5 analyzes the machine language instruction in which the program exception occurred, and the user program 2 "AP0
1 ”is an illegal decimal exception that cannot be continued, so the exception occurrence address“ 8.
5.254 ", the type of exception" illegal decimal exception ", and the illegal data address" 8.23.12. "
Write 0 ".

The process management unit 1 uses the user program 2
Is abnormally terminated, the program error information display means 7 is called during the abnormal termination processing of the user program 2.

The program error information display means 7 uses the exception address "8.
5.254 "is taken out and the exception occurrence address" 8.5.
Then, the code map 3 is searched with "254" to retrieve the program unit name "AP01" and the source line number "0036". Next, the program error information display means 7 looks at the exception type in the program exception information table 6 Cheating 10
Since it is a "base exception", the illegal data address "8.23.120" of the program exception information table 6 is taken out,
The data map 4 is searched for the illegal data address “8.23.120”, and the data name “A” and the data attribute length “6” and type “UNPAC” are retrieved. Then, the program error information display means 7 includes in the text of the error message "SE020" the type of exception "illegal decimal exception", the program unit name "AP01" that caused the abnormal termination, and the source line number " 36 ", the data name" A ", the value" 001A23 "and the type" UNPAC ", which are the contents, are embedded and output to the error information display device 8.

In the above embodiment, the error information includes the exception type, the program unit name, the source line number, the data name and its contents, but the error information includes at least the source line number and the data name. Thus, the object of the present invention can be achieved.

[0027]

As described above, the present invention is provided with the code map, the data map, the exception analysis means, the program exception information table and the program error information display means, and the source line number that causes the abnormal termination of the user program. By automatically creating and displaying the error information including the data name and the data name, the user can easily find the cause of the abnormal termination of the user program just by looking at the error message. There is an effect that the time and labor required for debugging can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an error information display system when a program ends abnormally according to an embodiment of the present invention.

FIG. 2 is a diagram for specifically explaining the operation of the error information display method when a program ends abnormally in the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Process management section 2 User program 3 Code map 4 Data map 5 Exception analysis means 6 Program exception information table 7 Program error information display means 8 Error information display device

Claims (1)

[Claims] 1. A code map showing correspondence between a source line number of a user program and an execution address in an error information display method when an abnormality occurs during execution of the user program, and in the user program, A data map showing the correspondence between the defined data name and the address of the storage area allocated during program execution, exception analysis means for analyzing the exception when an exception occurs in the user program, and this exception A program exception information table in which an exception occurrence address and an invalid data address are stored when an exception is analyzed as an abnormal termination cause by which the user program cannot continue, and an abnormal termination process of the user program Refer to the code map, the data map and the program exception information table Program terminates abnormally error information display system and having a program error information display means for creating and displaying error information including the source line number and data name Te.