JPH056294A - Dump sampling system - Google Patents

Abstract

PURPOSE:To write the contents of a main storage device to an outside storage device at exact timing from a program under execution by allocating dump sample request information to a specified bit in a main program. CONSTITUTION:A main storage device 3 stores a main program 6 and a dump sample program 7, and the specified bit in an instruction code constituting the program 6 is allocated as a dump sample request bit. In the case of fetching the instruction code from the main storage device 3 and decoding it, a central processing unit 2 refers to this dump sample request bit. Thus, memory dump can be sampled only by operating the specified bit in the instruction code on the program without correcting the source program.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dump collection system for copying the contents of an internal storage device to an external storage device.

[0002]

2. Description of the Related Art Conventionally, for example, a dump function in an electronic computer generally means copying the contents of a main storage device to an external storage device or the like, which is often used in the field of electronic computers. This dump function is used by the user by inputting a command from the console, and the program for writing the contents of the main storage device to the external storage device is registered in advance in the interrupt vector table, and the operating program It is conceivable to use it by generating an interrupt from.

[0003]

However, in the method in which the user inputs a command from the console to use the dump function, there is a time delay before the contents of the main storage device are actually copied to the external storage device. Therefore, if the user discovers a failure and then dumps, the necessary information may not be obtained.

Further, in the method of utilizing the dump function by using the interrupt program, it is necessary to previously code the interrupt instruction on the program in order to generate the interrupt from the program.

An object of the present invention is to solve the above-mentioned problems and to provide a dump collection system capable of reliably and accurately exhibiting a dump function.

[0006]

In order to achieve the above object, the dump collection system of the present invention refers to dump collection request information assigned to a specific bit in a main program, and when there is such information, It is characterized by having a computer for executing the dump collection program.

The computer has a main program having an instruction code in which specific bits are assigned to bits for storing memory dump collection request information, a main storage device for storing the dump collection program, and a main program for executing the main program. And a central processing unit that executes the dump collection program when there is a dump collection request in the instruction code.

Further, when decoding the instruction code in the main program, the central processing unit temporarily suspends the main program currently being executed when a dump collection request is made to the bit in the instruction code, It is preferable to execute a dump collection program to store the contents of the main storage device in an external storage device.

Since the present invention is constructed as described above, it is possible to collect dumps reliably and at an accurate timing.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the embodiments of the drawings.

FIG. 1 is a block diagram showing the structure of a computer incorporating an embodiment of the memory dump collecting system of the present invention.

The computer 1 shown in FIG. 1 refers to the dump collection request information assigned to a specific bit in the main program, and executes the dump collection program when there is such information. The computer 1 includes a central processing unit 2, a main storage device 3, an external storage device 4, and a system bus 5 connecting them.

The main storage device 3 stores a main program 6 operating on the computer 1 and a dump collection program 7. A specific bit in the instruction code configuring the program 6 is assigned as a dump collection request bit to store information on whether or not to collect a dump when the instruction is executed by the central processing unit 2. . The central processing unit 2 fetches the instruction code from the main memory 4,
Refer to this dump collection request bit when decoding. If dump collection is requested as a result of reference, after executing the instruction, the central processing unit 2 saves information necessary for restarting the main program 6 and branches the control to the dump collection program 7. The dump collection program writes the contents of the main storage device 3 to the external storage device 4. When the dump collection program 7 ends, the previously saved information is restored and the program 6 that was being executed before the dump collection is restarted.

As a result of referring to the dump collection request bit, if the dump collection request is not issued, the central processing unit 2
Fetches the next instruction code from the program 6 in the main memory 3 and continues the same processing.

As described above, in this embodiment, the contents of the main storage device can be written to the external storage device at an accurate timing from the program being executed, so that more accurate memory dump information can be obtained. . Moreover, in this embodiment, by only operating a specific bit of the instruction code on the program, without modifying the original program,
A memory dump can be easily collected.

[0016]

As described above, according to the present invention, the contents of the main storage device can be written to the external storage device at an accurate timing from the program being executed, so that more accurate memory dump information can be obtained. Moreover, there is an effect that a memory dump can be easily taken without modifying the original program simply by operating a specific bit of the instruction code on the program.

[Brief description of drawings]

FIG. 1 is a block diagram of a computer to which an embodiment of the present invention is applied.

[Explanation of symbols]

1 calculator 2 Central processing unit 3 main memory 4 External storage device 5 system bus 6 Main program 7 Dump collection program

Claims (3)

[Claims] 1. A dump collection system comprising a computer for referring to dump collection request information assigned to a specific bit in a main program and executing the dump collection program when there is such information. 2. A main program having an instruction code in which a specific bit is assigned to a bit for storing memory dump collection request information, a main storage device for storing the dump collection program, and the main program The dump collection system according to claim 1, further comprising a central processing unit that executes the dump collection program when a dump collection request is included in the instruction code. 3. The central processing unit, when decoding the instruction code in the main program, temporarily suspends the currently executing main program when a dump collection request is made to the bit in the instruction code, The dump collection system according to claim 2, wherein the dump collection program is executed to store the contents of the main storage device in an external storage device.