JPH01188957A - Program exception processing system - Google Patents

Abstract

PURPOSE:To point out a source program name through an address where a program exception is produced by securing the correspondence between the names of source programs and the executing addresses of machine word instructions and holding the correspondence data. CONSTITUTION:The machine word instructions are allocated to a source program 11 at and after an address 4000 of an executable program 21 together with the machine word instructions allocated to a source program 12 at and after an address 4800, and the machine word instructions allocated to a source program 13 at and after an address 5200 respectively. A correspondence production means 2 delivers the names of source programs 11-13 and the correspondence data 22 on the allocated addresses. If a program exception occurs in an address 5000, for example, an information means 3 informs the address 5000 to a deciding means 5. The means 5 decides the source program 12 as a source program name via a reference means 4 and displays it on a display device 40.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for handling program exceptions that occur during program execution in a computer system, and particularly to pointing out the name of a source program in which a program exception has occurred. This article relates to a program exception handling method that makes it possible to handle program exceptions.

(Prior Art) Conventionally, when a program exception occurs, the address of a machine language instruction assigned to the program as a result of compilation has been used as information pointing out the instruction that caused the program exception.

(Problems to be Solved by the Invention) In the conventional program exception handling method described above, the information for pointing out the instruction that caused the program exception depends on the main memory address and machine language instruction format, that is, the hardware structure. Therefore, it cannot be said to be meaningful information, especially for programmers who program using high-level languages. In other words, there was a problem in that it was not possible to determine in which source program the program exception occurred only from the indicated information.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the program exception handling method provided by the present invention compiles one or more source programs into an executable format that is a set of machine language instructions. In a program execution method for a computer system that creates a program, the name of the source program;
The WIiiiI assigned to the program in an executable format obtained by compiling this source program
means for associating an execution address of an i-word instruction; and a means for making correspondence between the name of the source program and the execution address of the machine language instruction, which are associated by the means, together with the program in an executable format. means for forming the module as a module in the executable format, means for referencing the corresponding data in the module in the executable format formed by the module forming means, and means for notifying the execution address of the machine language instruction where the program exception has occurred. and means for determining the name of the source program in which the program exception has occurred, based on the machine language instruction execution address notified by the notification means and the corresponding data referenced by the reference means. shall be.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a program exception system according to an embodiment of the present invention.

In the figure, 1 is a module forming means, 2 is a corresponding means, and 3
is a notification means, 4 is a reference means, 5 is a determination means, 11 to 13
is a source program, 20 is an executable module,
21 is an executable program, 22 is corresponding data, 3
0 indicates a main memory, and 40 indicates a display device.

The source programs 11 to 13 are compiled into an executable program 21 which is a set of machine language instructions. This executable program 21 is associated with means 2.
The executable module 20 is formed by the module forming means 1 together with the correspondence data 22 between the names of the source programs 11 to 13 and the machine language instruction execution addresses of the executable program 21, which are associated with each other. Also,
The executable program 21 performs processing by moving on the main memory 30.

Next, a specific example of this embodiment will be explained.

In FIG. 1, source program 11 is assigned machine language instructions from address 4000 of executable program 21, source program 12 is assigned machine language instructions from address 4800 of executable program 21, and source program 13 is executed. Possible model program 21-52
Assume that machine language instructions are assigned starting from address 00. At this time, the correspondence data 22 outputted by the correspondence means 2 includes the names of the source programs 11 to 13 and the assigned addresses. In other words, r4000J for source program 11, "4800" for source program 12, and r for source program 13.
5200J are associated with each other. For example, if a program exception occurs at address 5000 while the executable program 21 is being loaded into the main memory 30 and being executed, the notification means 3 will notify the executable program 21 at the address "5000" where the program exception has occurred. 500
0” is notified. The determining means 5 selects the address r5000. notified by the notifying means 3. Based on this, the reference means 4 is used to refer to the corresponding data 22 in the executable format module 20, and according to the flowchart shown in FIG.
The source program 12 is determined as the name of the source program in which the program exception has occurred, and is displayed on the display device 40.

FIG. 2 is a flowchart showing the processing flow of the determining means 5 of FIG. When the determining means 5 is notified of the address at which the program exception has occurred from the notifying means 3, the determining means 5 refers to the correspondence data 22 using the reference means 4 and determines the program name corresponding to this address.

(Effects of the Invention) As explained above, the present invention associates the name of a source program with the execution address of a machine language instruction assigned to an executable program obtained by compiling this source program. By retaining the corresponding data, it is possible to point out the name of the source program in which the program exception occurred from the address where the program exception occurred.

Therefore, when a programmer investigates a fault, it has the following effects.

Even without knowledge of hardware such as address allocation, address expansion methods, or machine language instructions, the name of the source program in which a program exception has occurred can be known, making fault investigation easier. Furthermore, even if you do not know how the compiler generates machine language instructions, you can know the name of the source program in which the program exception occurred.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a program exception method according to an embodiment of the present invention, and FIG. 2 is a flowchart showing the flow of processing of the determining means 5 of FIG. 1. 1... Module forming means, 2... Corresponding means,
3... Notification means, 4... Reference means, 5... Determination means, 11-13... Source program, 20... Executable format module, 21... Executable format program, 22. ...Corresponding data, 30...Main memory, 40
...Display device.

Claims (1)

[Claims] A program execution method for a computer system that compiles one or more source programs to create an executable program that is a set of machine language instructions, comprising: means for associating execution addresses of the machine language instructions assigned to the program in an executable format obtained by compiling the program; and a name of the source program and the execution addresses of the machine language instructions that are correlated by the associating means. means for forming a module in an executable format together with the program in an executable format; and means for referencing the corresponding data in the module in an executable format formed by the module forming means; , means for notifying the machine language instruction execution address where the program exception has occurred, and determining whether the program exception has occurred based on the machine language instruction execution address notified by the notification means and the corresponding data referenced by the reference means. 1. A program exception handling method, comprising means for determining the name of a source program that has occurred.