JPS6347843A - Interrupting system for processing in execution - Google Patents

Abstract

PURPOSE:To limit an interruption module even by a condition other than an execution key, by searching the stack of a processing in execution after applying interruption on the processing by an asynchronous indexing, and performing the interruption designation of a specific stack frame. CONSTITUTION:An asynchronous indexing receiving means 14 delivers control to an interrupting position selection means 15 in a case to limit the interruption module by the condition other than the execution key, and decides the condition of the interruption module based on the cause of the generation of an interruption request, and searches the stack frame of a module which satisfies the condition. An interrupting position designating means 16 turns ON an interruption designating flag for a selected stack frame, and stores a bit of information regarding a processing performed at time of interruption, in a processing control structure 19. Hereafter, the ordinary processing of an interruption object processing 12 is performed, however, when the interruption designating flag is set at an ON-state, the control is delivered to an interruption receiving means 17, and the processing control structure 19 is referred, and the processing to be performed at time of the interruption is executed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an interrupt method for a running process;
In particular, it relates to interrupt methods for running processes in information processing task management.

[Conventional technology]

In the conventional method of interrupting a running process, an asynchronous interrupt bit and an asynchronous interrupt execution key number in the process control structure are set, and the execution key of the execution module is the same as or larger than the asynchronous interrupt execution key number. The method used was to generate an asynchronous index exception when the error occurred.

[Problem that the invention seeks to solve]

The above-described conventional method of interrupting an execution process has a drawback in that the interrupting module can only be distinguished by the execution key.

[Means for solving problems]

The method of interrupting a running process according to the present invention includes an asynchronous interrupt specifying means for generating an asynchronous interrupt exception in an interrupt target process, an asynchronous interrupt receiving means for receiving control when an exception specified by the asynchronous interrupt specifying means occurs, and an asynchronous interrupt receiving means for determining an interrupt condition. an interrupt location selection means for determining and searching for a module that meets the conditions;
It has interrupt point specifying means for generating an exception in the module selected by the interrupt point selecting means, and interrupt receiving means to which control is passed when the exception specified by the interrupt point specifying means occurs.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the invention. In FIG. 1, this embodiment has an interrupt request process 11 and an interrupt target process 12, an asynchronous interrupt specifying means 13 is provided on the interrupt request process 11 side, and an asynchronous interrupt receiving means is provided on the interrupt target process 12 side. 14, interrupt point selection means 15, interrupt point specifying means 16, interrupt receiving means 17, stack 18, and process control structure 19.

FIG. 2 shows the stack structure in this embodiment. In FIG. 2, the stack 18 of the interrupt target process 12 shown in FIG. 1 includes stack frames 81-83, and these stack frames 81-83 correspond to modules 84-86, respectively.

3 to 7 show the flow of each means in this embodiment.

Next, the operation of this embodiment will be explained. In this embodiment, when an interrupt request is generated by the interrupt request process 11 to the executing process 12, the asynchronous interrupt specifying means 13 of the interrupt request process 11 is executed in step 31 (
The value of the asynchronous interrupt execution key number is determined based on the cause of the occurrence of the interrupt request in FIG. 3
The value of this asynchronous index execution key number is stored in the asynchronous index execution key number storage area 3.

The control of the interrupt target process 12 is such that after the asynchronous interrupt bit and the asynchronous interrupt execution key number are set, the execution key of the execution module of the interrupt target process 12 becomes equal to or greater than the asynchronous index execution key number, and the asynchronous interrupt is executed. When an exception occurs, it is passed to the asynchronous index receiving means 14.

The asynchronous index receiving means 14 performs the judgment step 41.
(FIG. 4), it is determined whether the interrupt module needs to be further limited using a method other than the module execution key, and if it is necessary to limit the interrupt module, control is passed to the interrupt location selection means 15 in step 42. If there is no limitation, the processing to be performed at the time of an interrupt is executed in step 43.

The interrupt point selection means 15 performs step 51 (FIG. 5).
In step 52, conditions for the interrupt module are determined based on the cause of the interrupt request, and in decision step 52 and step 53, the hosts in the stack are sequentially referred to to search for a stack frame of a module that meets the conditions.

The interrupt point specifying means 16 performs step 61 (FIG. 6).
At step 6, the interrupt designation flag is turned ON for the stack frame selected by the selection means 15, and at the same time, step 6
In step 2, information about processing to be performed at the time of an interrupt is stored in the process control structure. The bit used as the interrupt designation flag here should originally be O.

After specifying the interrupt location, normal processing of the interrupt target process 12 is performed, but when control is returned to a shallow module of the host by a return (RE TURN) instruction, even if the interrupt specification flag of the stack frame corresponding to this module is ON. If an exception occurs, control is passed to the interrupt receiving means 17. Regarding this exception occurrence, the second
To explain with reference to the figure, when the module 85 is a module that meets the interrupt condition, the interrupt designation flag of the stack frame 82 is turned ON.

When the RETURN instruction of the module 86 is executed during normal processing of the process, it is detected that the interrupt designation flag of the stack frame 82 is ON, and an exception occurs.

The interrupt receiving means 17 performs step 71 (FIG. 7).
refer to one process control structure in step 7
In step 2, the processing to be performed at the time of an interrupt is executed.

〔Effect of the invention〕

As explained above, the present invention interrupts a running process by asynchronous allocation, searches the stack of that process, and specifies an interrupt for a specific stack frame. This has the effect of limiting the number of interrupt modules.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a diagram for explaining the occurrence of an exception due to an interrupt in an interrupt module, and FIGS. 3 to 7 are diagrams showing the flow of processing. be. 11... Interrupt request process, 12... Interrupt target process, 13... Asynchronous interrupt specification means,
14... Asynchronous interrupt receiving means, 15... Interrupt point selecting means, 16... Interrupt point specifying means, 17... Interrupt receiving means, 18... Stack, 19... Process control structure. ,′

Claims (1)

[Claims] In an interrupt method in which an interrupt requesting process requests an interrupt from an executing interrupt target process, an asynchronous interrupt specifying means generates an asynchronous interrupt exception in the interrupt target process, and control is transferred when an exception specified by the asynchronous interrupt specifying means occurs. an asynchronous interrupt receiving means; an interrupt location selecting means for determining an interrupt condition and searching for a module matching the condition;
An execution process characterized by comprising an interrupt point specifying means for generating an exception in a module selected by the interrupt point selecting means, and an interrupt receiving means to which control is transferred when the exception specified by the interrupt point specifying means occurs. Interrupt method.