JPS63266554A - Program debugging system - Google Patents

Abstract

PURPOSE:To debug memory shortage processing in a short period of time and with high efficiency by performing the automatic memory shortage processing for all requesters. CONSTITUTION:When the buffer security requesting frequency exceeds a fixed level, a means shows that the buffer security requesters 51-5n have shortage of memories and returns a memory shortage status for execution of the memory shortage processing of those requesters. In addition, the requester that returned the memory shortage status is recorded by a buffer security requester register part 4 in order to avoid the inclination where the memory shortage status is returned to a certain requester only. Furthermore the part 4 functions to avoids a case where a requester has the return frequency of the memory shortage status larger than a fixed level. Then the means 1 functions to set the buffer security requesting frequency at zero so that a random change is secured for such a requester that performs the memory shortage processing when the memory shortage status is returned. Thus it is possible to perform the automatic debug for the memory shortage processing of all requesters.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a program debugging method for an information processing system that dynamically manages memory space.

[Conventional technology]

Conventionally, when debugging memory shortage processing for buffer allocation requests in multiple locations, in a batch of -m locations,
It was pretending that there was a memory shortage.

[Problem that the invention seeks to solve]

The conventional debugging method for memory shortage processing described above requires a lot of man-hours because debugging is done manually one by one.
The disadvantage is that it takes a lot of time for debugging.

[Means for solving problems]

The program debugging method of the present invention includes a means for switching on/off of the low memory debug mode according to an operator's instruction, a buffer allocation process when the low memory debug mode is off, and a buffer reservation request when the low memory debug mode is on. A means for counting and storing the number of buffer reservation requests, and if the number of buffer reservation requests is within a certain number, normal buffer reservation processing is performed, and if it is above a certain number, a request is made by indicating that there is insufficient memory to the requestor who requested buffer reservation. A means to return the memory shortage status that causes the original memory shortage processing to be executed, and a method to record the request source that returned the memory shortage status so that the memory shortage status is not returned unilaterally to one request source. A request source registration means that prevents a memory shortage status from being returned any more to a request source that has returned a memory shortage status more than a number of times, and a request source that randomly changes the request source that causes memory shortage processing to be performed when the memory shortage status is returned. and means for zeroing the number of buffer reservation requests.

[For production]

The present invention automatically debugs memory shortage processing for all request sources.

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

FIG. 1 is a block diagram of an embodiment of the program debugging method of the present invention.

This embodiment includes a buffer reservation management section 1, a debug mode flag 2, a buffer reservation request count section 3, a buffer reservation request source registration section 4, a buffer reservation request source 51,
52. ~, 5n.

The following table shows an example of the buffer reservation request source registration unit 4, and includes the buffer reservation request source address and the number of times the memory shortage status is returned.

The buffer reservation request sources 51 to 5n request a buffer from the buffer reservation management section 1 when a buffer is required.

The buffer reservation management section 1 refers to the debug mode flag 2, and if it is off, it allocates a normal buffer, and if it is on, it recognizes that it is in debug mode, and increments the counter of the buffer reservation request count section 3 by 1. If the count value is less than a certain value, normal buffer security is performed, and if the count value exceeds a certain value, the buffer reservation request source registration unit 4 is referred to and the buffer reservation request source is entered in the buffer reservation request source address column. Check whether the address is registered, and if it is already registered and the number of times the memory shortage status is returned is a certain number or more, normal buffer reservation is performed. If the address of the buffer reservation request source is not registered in the buffer reservation request source address column, it is newly registered, the memory shortage status return count is set to 1, and the memory shortage status is returned to the buffer reservation request source. Even if the address of the buffer reservation request source is registered in the buffer reservation request source address field, if the number of times the memory shortage status is returned is less than a certain number of times, the number of times the memory shortage status is returned is incremented by 1, and the address of the buffer reservation request source is registered. returns an out-of-memory status. When the memory shortage status is returned to the buffer reservation request source, the counter of the buffer reservation request count unit 3 is set to 0. Note that the on/off state of the debug mode flag 2 is dynamically changed by the operator's console command.

〔Effect of the invention〕

As described above, the present invention automatically performs memory shortage processing for all request sources, thereby eliminating the need for human intervention, and has the advantage that memory shortage processing can be debugged efficiently in a short period of time.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the program debugging method of the present invention. 1-----Buffer reservation management section, 2...Debug mode flag, 3-----Buffer reservation request count section, 4-
-----Buffer reservation request source registration unit, 51 to 5n...
...Buffer reservation request source. 1 Hiki Buried Person Masu Buried Officer Kadohara 9. ,,((7:
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Claims (1)

[Claims] In an information processing system that dynamically manages memory space, there is provided a means for switching on/off an insufficient memory debug mode according to instructions from an operator, and a buffer allocation process when the insufficient memory debug mode is turned off. and means to count and save the number of buffer allocation requests when the memory shortage debug mode is on, and to perform normal buffer allocation processing if the number of buffer allocation requests is within a certain number, and to request buffer allocation if it exceeds a certain number. A means for returning a memory shortage status that indicates a memory shortage to a requested request source and causes the request source to execute memory shortage processing, and a means for returning a memory shortage status to prevent a single request source from returning a memory shortage status unilaterally. A request source registration means for recording a request source that has returned a status, and preventing the request source that has returned a memory shortage status more than a certain number of times from returning the memory shortage status any more; and means for setting the number of buffer reservation requests to zero in order to randomly change a request source for performing memory shortage processing.