JPH0594331A - Breaking system by software interruption - Google Patents

Abstract

PURPOSE:To perform the breaking by the arbitrary program execution address of an object program by controlling the action only of the prescribed program under the environment of a multi-task operating system. CONSTITUTION:The system is equipped with a terminal device 11 as an input output device, a man machine interface 12 to analyze the command of the designation and release of the greak of a program inputted from the device 11, an instruction saving buffer 16 to save an original instruction when a software interruption instruction is embedded in the program, and a software interruption monitoring program 15 to monitor the interruption to occur when the software interruption instruction embedded in the program is performed. When the action condition of a certain program in a certain condition is grasped under the environment where plural programs A-Z are operated under a multi- task operating system 13, without giving a damage to the action of other program, an object program action only is controlled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a break method using a software interrupt, and more particularly to software for controlling only the operation of a specific program when a plurality of programs are operating under the environment of a multitasking operating system. This is a break method with a via interrupt.

[0002]

2. Description of the Related Art In a conventional multitasking operating system, as shown in the block diagram of FIG. 3, when a command for designating a break of a program is issued from a terminal device 31, the break of the break is specified by a man-machine interface 32. The specification is analyzed, and the programs A, B, ...
The target program is broken by issuing a system macro so that the target program for which a break is designated in the program group 34 of Z waits.

Further, when the break release of the program that has broken is specified from the terminal device 31, the break release is analyzed by the man-machine interface 32, and the multitask operating system 3
3, the target program is restarted by issuing a system macro so that the broken target program of the program group 34 is restarted.

[0004]

In the above-mentioned conventional break method based on the software interrupt, the process 1 of FIG.
In the case of the example of the program 41 consisting of 2 and 3, when the program 41 is broken by the method described above, the execution management of the program 41 is controlled by the multitasking
Since it is entrusted to the system, the execution status of the program 41 is not known, that is, which of the processes 1, 2 and 3 is being executed is not executed. Therefore, the system macro is sent from the terminal to the multitasking operating system. Since the program 41 breaks at the timing of issuing, there is a problem that it is not possible to make a break just before executing the process 2, for example.

[0005]

In the break method by the soft interrupt of the present invention, a target program is designated from a plurality of online programs, and the program is broken from the online. Therefore, it is desired to break the target program. When the instruction of the address is saved, the software interrupt instruction is embedded in this address, and when the software interrupt instruction of this address is executed online, only the target program is taken off-line and the other remaining programs are kept online. After the instruction saved for the break is restored to the address in which the software interrupt instruction is embedded, the target program is brought back online.

[0006]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a break system by a software interrupt according to the present invention.

As shown in FIG. 1, the break method by software interrupt of the present embodiment analyzes a terminal device 11 as an input / output device and a command for designating and canceling a break of a program input from the terminal device 11. A machine interface 12, an instruction save buffer 16 that saves an original instruction when a software interrupt instruction is embedded in a program, and an interrupt that occurs when a software interrupt instruction embedded in the program is executed are monitored. Software interrupt monitoring program 15
Program managed by system 13
The operation of the program group 14 of A, B, ..., Z is controlled.

FIG. 2 is a flow chart showing an example of the operation in the break method by the software interrupt of this embodiment. Occurs when a program 21 consisting of processes 1, 2 and 3 to be broken, a processing program 22 at the man-machine interface 12 when a break designation is instructed from the terminal device 11, and a software interrupt instruction is executed. A software interrupt monitoring program 24 for monitoring an interrupt to be executed and a processing program 25 in the man-machine interface 12 when a break release command is issued from the terminal device 11 are shown.

In the break method by the soft-veer interrupt of this embodiment, first, in FIG.
When designating a break of a certain program, the program execution address of the program to be actually broken out of the programs A, B, ..., Z of the program group 14 is designated, and the break of the break is designated by the man-machine interface 12. The designation is analyzed, and the program execution address of the target program is replaced with the software interrupt instruction. At this time, the original instruction before being replaced with the software interrupt instruction is saved in the instruction save buffer 16. This means
In FIG. 2, when the program execution address of the process 2 is specified and the break designation is instructed from the terminal device 11 when a break is desired immediately before executing the process 2 of the program 21 including the processes 1, 2 and 3, for example. Man Machine
In the processing program 22 in the interface 12, the instruction of the program execution address of the target program is saved in the instruction save buffer 23, the software interrupt instruction is embedded in the program execution address, and the program actually executes the instruction of the program execution address. Make sure that a software interrupt occurs when this happens.

Next, when the program in which the software interrupt instruction is embedded in FIG. 1 actually executes the instruction, a software interrupt occurs and the software interrupt monitoring program 15 is activated. Here, of the system macros of the multitasking operating system 13, a wait macro for shifting the execution state of the program to the wait state is issued, the corresponding program is made to wait, and at this time, it is saved in the instruction save buffer 16. Undo a certain command. That is, in FIG. 2, when the execution of the program 21 reaches immediately before the process 2 and the software interrupt instruction embedded therein is executed, a software interrupt occurs and the software interrupt monitoring program 24 is called. In the software interrupt monitoring program 24, the original instruction of the process 2 of the program 21 saved by the process program 22 in the man-machine interface 12 when the break instruction is issued from the terminal device 11 is saved in the instruction save buffer 23.
The program execution address in which the software interrupt instruction of the process 2 of the program 21 is embedded is written back to the original instruction, and the multitask operating
The program execution management system macro of the system 13 issues a wait macro for shifting the program execution state to the wait state to shift the program 21 to the wait state and break the operation of the program 21.

Thereafter, in FIG. 1, from the terminal device 11,
When the break of the broken program is released, the break release is analyzed by the man-machine interface 12 and the execution state of the program in the system macro of the multitasking operating system 13 is shifted to the executable state. Issue a restart macro to restart the program. That is, in FIG. 2, the processing program 25 in the man-machine interface 12 when the break release command is issued from the terminal device 11 is included in the system execution management system macro of the multitasking operating system 13. , Issues a restart macro that shifts the execution state of the program to the executable state, shifts the program 21 to the executable state, and restarts the operation of the program 21. At this time, the program 21 has already processed 2
It was returned to the original instruction of, and as nothing happened,
Execution starts from process 2.

[0013]

As described above, according to the break method by software interrupt of the present invention, a program operating condition in a certain state is grasped in an environment in which a plurality of programs are operating under a multitasking operating system. At this time, it is possible to control only the operation of the target program without disturbing the operation of other programs and break at any program execution address of the target program.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a break method by a soft interrupt according to the present invention.

FIG. 2 is a flow chart showing an example of an operation in a break method by a software interrupt of this embodiment.

FIG. 3 is a block diagram showing a conventional break method by a soft interrupt.

FIG. 4 is a flowchart of processing of a program including processing 1, 2, and 3.

[Explanation of symbols]

11 terminal device 12 man-machine interface 13 multi-task operating system 14 program group 15, 24 software interrupt monitoring program 16, 23 instruction save buffer 21 program 22 man-machine when a break is instructed
Interface processing program 25 Man-machine when commanded to release break
Interface processing program

Claims (1)

[Claims] 1. A target program is selected from a plurality of programs that are online to break the program and the program is taken out of the online mode. Therefore, the instruction at the address to be broken in the target program is saved, and a software interrupt instruction is embedded in this address. When the software interrupt instruction at this address is executed online, only the target program is taken off-line, the remaining programs are kept online, and the software interrupt instruction saves the instruction saved for the break. A break method by soft-veer interrupt, wherein the target program is brought back online after returning to the embedded address.