JPH01129332A - System for detecting program traveling condition - Google Patents

Abstract

PURPOSE:To recognize which part of an evaluating object program is not evaluated (not executed) yet by print-outputting the contents of a trace memory after a test program is executed in evaluation at a program developing time. CONSTITUTION:When a memory 3 is accessed, data '1' is set to the same address of a trace memory 4. A decoder 2 decodes a signal on an address bus 7 and whether the access is a memory access or not is also decided to the memory 3 and the trace memory 4. The contents of the trace memory 4 can be outputted through a printing device control part 5 to a printing device 6. When the contents of the trace memory 4 are wholly cleared with '0' before a trace is started and the test program for evaluation is executed, the data pattern of '1'/'0' is prepared in the trace memory 4 and the contents are outputted to the printing device 6 after the trace. Thus, the executing result of the test program can be easily evaluated.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is a program! ! The present invention relates to IIJ Omanshiki's information processing device, and particularly relates to an access state detection method when running a program.

(Prior Art) Conventionally, when a program is developed and its validity is fully evaluated, a method is known in which the evaluation is performed indirectly by executing a test program and checking the result.

(Problems to be Solved by the Invention) In the conventional program running state detection method described above, it is not possible to know how much of the entire program to be evaluated has been executed by running the entire portrait test program. First, it has the disadvantage that it is difficult to fully determine whether all routines have been evaluated.

An object of the present invention is to print out the entire contents of the trace memory after executing a test program during evaluation during program development, thereby removing the above-mentioned points and making it possible to easily evaluate the execution results of the test program. The purpose is to provide a full range of grogram running state detection methods.

(Means for Solving All Problems) The program running state detection method according to the present invention is implemented by including a central processing section, a memory, a trace memory, and a printing device.

The central processing unit is for executing information processing using a variety of stored programs.

The memory is the tth one that stores the entire program.

The trace memory has an address area that is equal to or larger than the address area of the memory, and when the memory is accessed, it can set/reset the bit at the address corresponding to the access address, and the contents of the memory? It is for tracing.

The printing device R is for printing the contents of the trace memory and detecting memory access conditions and problems after the entire program has run.

(Example) Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a program running state B detection system according to the present invention.

In FIG. 1, 1 is a central processing unit, 2 is a decoder, 3 is a memory, 4 is a trace memory%, 5 is a printing device control unit,
6 is a printing device, 7 is an address bus, and 8 is a data bus.

The memory 3 is for storing programs, and the central processing unit 1 is for taking out programs from the memory 3 and executing them.

Access from the central processing W51 to the outside is performed by the address bus 7 and the data bus 8.

Trace memory 4 has the same address and the same number of words as memory 3, but the data width of trace memory 4 is 1.
Bit/word. When memory 3 is accessed,
Data "'1" is set at the same address in the trace memory 4.

Decoder 2 decodes all signals on address bus 7,
A complete determination is made as to whether or not memory 3 and trace memory 4 are accessed.

The contents of the trace memory 4 can be output to the printing device 6 via the printing device control section 5.

Before starting the trace, all contents of the trace memory 4 are cleared to 0", and when the entire evaluation test program is executed, a data pattern of l"/"0" is created in the trace memory 4, and the trace memory 4 is cleared to 0". Afterwards, the contents are outputted to the printing device 6.

(Effects of the Invention) As explained above, the present invention enables easy confirmation of the executed addresses by printing out the contents of the trace memory after the entire test program has been executed during evaluation during program development. This has the effect of being able to fully understand which parts of the target program have not been evaluated (not executed).

Further, since the program can be easily debugged, there is an effect that no trouble occurs after shipment.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a program running state detection method according to the present invention. 1... Central processing unit 2... Decoder 3... Memory 4... Trace memory 5... Printing device control section 6... Printing device 7... Address bus
8...Datapass patent applicant NEC Corporation

Claims (1)

[Claims] It has a central processing unit for executing information processing using a stored program method, a memory for storing programs, and an address area that is equal to or larger than the address area of the memory, and an access address when the memory is accessed. A trace memory for tracing the contents of the memory, and a memory access state after the program is run by printing the contents of the trace memory. A program running state detection method characterized by comprising a printing device for detecting a program.