JP2690486B2 - Program execution status monitoring method - Google Patents

Description

The present invention relates to a program execution state monitoring method, and more particularly to a program execution state monitoring method for a program including a reentrant program. [Prior Art] As means for monitoring the execution state of a target program,
There is generally known means for inserting an interrupt instruction to a monitor in a target program in an execution state and collecting information for monitoring the execution state of the program when the interrupt instruction is executed. In the conventional program execution state monitoring method for doing this, the following three operations are repeated. (A) The original instruction at the monitoring position provided to monitor the execution state of the target program is taken out, and the interrupt instruction I which is the first interrupt instruction is inserted at the monitoring position,
Continue execution of the target program. (B) When the interrupt instruction I is executed, the information for monitoring the execution state of the target program is collected, the interrupt instruction I is returned to the original instruction, and the instruction at the next position is taken out. An interrupt instruction II, which is a second interrupt instruction, is inserted at that position and execution of the target program is continued from the original instruction position. (C) When the interrupt instruction II is executed, the interrupt instruction II
Is returned to the instruction next to the original instruction, and the operation (a) is performed. FIG. 4 is an operation explanatory view showing the operation of the conventional program execution state monitoring method. In FIG. 4, the object program 1a shows a state in which the interrupt instruction I is inserted in the operation (a). In the target program 1b, when the interrupt instruction I is executed in the operation of (b) above, the interrupt processing unit 4c restores the interrupt instruction I to the original instruction and inserts the interrupt instruction II at the next position. It shows the state of being done. Further, when the interrupt instruction II is executed in the operation of (c), the interrupt processing unit 4c returns the interrupt instruction II to the instruction next to the original instruction and inserts the interrupt instruction I. It indicates that the operation is performed. [Problems to be Solved by the Invention] In the conventional program execution state monitoring method described above, when the target program is reentrant, the target program 1b in which the interrupt instruction I is restored to the original instruction and the interrupt instruction II is inserted. If another task with a higher priority is active when the status becomes, the other task activates the target program 1b, and the original instruction and interrupt instruction II are executed first. There is a possibility that it will be executed, and if it has been executed, the interrupt instruction I has not been executed, and the information for monitoring the execution state of the target program at this time will not be collected. As described above, the conventional program execution state monitoring method described above, when the target program is reentrant,
There is a problem that the information for monitoring the execution state of the target program may not be collected. An object of the present invention is to provide a program execution state monitoring method capable of always collecting information for monitoring the execution state of a target program even if the target program is reentrant. [Means for Solving Problems] The program execution state monitoring method of the present invention is (A) a program that can be executed in parallel by any number of tasks even if it is being executed by another task. A target program including a reentrant program, (B) before executing the target program in advance, the original instruction at the monitoring position provided for monitoring the execution state of the target program is taken out, and the first instruction is stored at the monitoring position. An interrupt instruction insertion unit that inserts an interrupt instruction of No. 1 and adds a second interrupt instruction to the original instruction and sends the interrupt instruction; (C) Sends from the interrupt instruction insertion unit before executing the target program in advance. Received the original instruction that was followed by the second interrupt instruction that follows,
An interrupt management table holding unit for holding these in a form capable of being executed together with the object program, (D) Executing the object program when an interrupt occurs due to the first interrupt instruction during execution of the object program After performing the process of monitoring the state, the original instruction and the second interrupt instruction in the interrupt management table holding unit are executed, and when the interrupt by the second interrupt instruction occurs, the extracted instruction And an interrupt processing unit for continuously executing the target program from the next instruction at the position where the original instruction was. Embodiment Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a program execution state monitoring system of the present invention. The target program 1 is a program whose execution state is monitored including a reentrant program. The interrupt instruction insertion unit 2 takes out an original instruction at a monitoring position provided to monitor the execution state from the object program 1 and inserts an interrupt instruction I which is a first interrupt instruction at the monitoring position. . The original instruction is the second interrupt instruction, interrupt instruction II.
Is added to the interrupt management table holding unit 3 from the interrupt instruction insertion unit 2. FIG. 2 is an information structure diagram showing an example of the contents of the interrupt management table holding unit 3. FIG. 3 is an operation explanatory view showing the operation of the present invention. As shown in FIG. 3, the interrupt instruction I is inserted into the object program 1, and the original instruction and the interrupt instruction II are held in an executable form in the interrupt management table holding unit 3. Since a plurality of monitoring positions provided to monitor the execution state can be provided, the contents of the interrupt management table holding unit 3 are, as shown in FIG. 2, the addresses of the respective monitoring positions and their respective addresses. Command- (1), (2), …………
... and interrupt instruction II- (1), (2), ..... As shown in FIG. 3, the interrupt processing unit 4 is activated when the interrupt by the interrupt instruction I occurs during execution of the object program 1, and checks the execution state of the object program 1. Various information indicating the execution status depends on the information content.
It is stored in the memory 5 or the external storage 6. After checking the execution state of the object program 1, the interrupt processing unit 4 determines whether the interrupt management table holding unit 3 is present as shown in FIG.
Control is passed to the position where the original instruction and the interrupt instruction II having the address of the corresponding monitoring position of the above are executed and these are executed. As a result, when an interrupt due to interrupt instruction II occurs,
As shown in FIG. 3, since the interrupt processing unit 4 is activated again, the interrupt processing unit 4 returns control to the object program 1 as shown in FIG. The target program 1 is continuously executed from the next instruction at the specified position. [Effects of the Invention] As described above, in the program execution state monitoring method of the present invention, the first interrupt instruction is inserted at the monitoring position to execute the target program, and the original instruction at the inserted position is managed as an interrupt. By executing in the table holding unit, even if the target program is reentrant, it is possible to always collect the information for monitoring the execution state of the target program by the interrupt by the first interrupt instruction. There is.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a program execution state monitoring system of the present invention, FIG. 2 is an information structure diagram showing an example of contents of an interrupt management table holding unit, and FIG. Is an operation explanatory view showing an operation of the present invention, and FIG. 4 is an operation explanatory view showing an operation of a conventional program execution state monitoring system. 1, 1a, 1b ...... Purpose program, 2 ...... Interrupt instruction insertion part, 3 ...... Interrupt management table holding part, 4, 4c ...... Interrupt processing part, 5 ...... Memory, 6 ...... External storage.

   ────────────────────────────────────────────────── ─── Continuation of front page    (56) References JP-A-58-96355 (JP, A)                 JP-A-57-50058 (JP, A)                 JP-A-58-4461 (JP, A)                 JP-A-61-279949 (JP, A)                 JP-A-61-40648 (JP, A)

Claims (1)

(57) [Claims] (A) a target program including a reentrant program that is a program that can be executed in parallel by any number of tasks even if it is being executed by a certain task, (B) before executing the target program in advance, The original instruction at the monitoring position provided for monitoring the execution state of the object program is taken out, the first interrupt instruction is inserted at the monitoring position, and the second interrupt instruction is added to the original instruction. An interrupt instruction inserting section to be additionally transmitted, (C) receiving the original instruction and the second interrupt instruction following the original instruction transmitted from the interrupt instruction inserting section before executing the target program in advance; ,
An interrupt management table holding unit for holding these in a form capable of being executed together with the object program, (D) Executing the object program when an interrupt occurs due to the first interrupt instruction during execution of the object program After performing the process of monitoring the state, the original instruction and the second interrupt instruction in the interrupt management table holding unit are executed, and when the interrupt by the second interrupt instruction occurs, the extracted instruction A program execution state monitoring method, comprising: an interrupt processing unit that continuously executes the target program from the next instruction at the position where the original instruction was.