JPS61272840A - Test comprehensiveness measuring instrument for microcomputer program - Google Patents

Abstract

PURPOSE:To measure heat comprehensiveness even when there is no room to store a measurement program in a computer system by enabling to measure the test comprehensiveness by hardware without using a measurement program. CONSTITUTION:Before starting a test, the range of address of instruction section of a program to be tested is set before hand to an address range setting section 5. When the testing of the program to be tested is started, a central processing unit 1 repeats cycle that fetches instruction of the program to be tested stored in a main memory 2 one by one and executes. An address reading section 6 detects timing of instruction fetching by the fact that a signal of a memory reading controlling line section 4 becomes on, and reads an address of the instruction that flows in an address bus 3 at that point of time. If the address is within the range indicated by the address range setting section 5, the number of times of reading is recorded in the address of a storage section 7 similar to the address of read instruction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device used when testing a combinator program for a micro combinator, and more particularly to a device for measuring the test coverage of a combinator program. .

[Conventional technology]

Newly produced computer programs are tested before being used in actual business. Tests are generally conducted multiple times or continuously over a long period of time to confirm that the Combiator program meets the designed functionality and performance. Test coverage is used as one indicator. Here, the test coverage is a value indicating to what extent each part of the convenience store program has been executed by tests, or to what degree it has been referenced.

Conventionally, in order to measure test coverage, it was necessary to run the program to be tested, that is, the program under test, under a test coverage measurement program.

[Problem that the invention seeks to solve]

The method of measuring test coverage using the conventional test coverage measurement program described above is a method in which the measurement program interrupts the operation of the program under test and records its operating status. It is not suitable for measuring system programs, and requires a memory area that can run the program under test and the measurement program at the same time. Measurement using the Eta system was not possible.

[Means for solving problems]

The present invention measures test coverage in a micro combinator system using hardware rather than relying on a measurement program.

In order to achieve the above object, the present invention has the following configuration.

That is, in a microcomputer system consisting of a central processing unit and a main memory storing a program under test, an address range setting unit sets the address range of the instruction section of the program under test, and the central processing unit sets the address range of the instruction section of the program under test. An address reading unit that reads the address of the instruction each time an instruction is read from the address, and a memory that has an address space equal to or larger than the main memory and records the number of times the instruction has been read at the same address as the address of the instruction read by the address reading unit. The present invention is a test coverage measuring device for a microcomputer program, which includes a coverage calculation section that calculates coverage from the recorded contents of a storage section, and a coverage display section that displays the calculated coverage.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The operation of the microconvenience tabgram test coverage measuring device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the present invention.

Before starting the test, the address range of the instruction section of the program under test is set in the address range setting section 5. When testing the program under test, the central processing unit 1 repeats a cycle of fetching and executing instructions of the program under test stored in the main memory 2 one by one. The address reading section 6 detects the instruction fetch timing when the signal on the memory read control line 4 turns ON, reads the address of the instruction flowing through the address bus 3 at that point, and the address of the read instruction is set in the address range setting section. If it is within the address range indicated by , the number of reads is recorded at the same address in the storage unit 7 as the address of the read instruction. As the address reading unit 6 repeats the above operations during the test, the number of times each instruction of the program under test is read is recorded in the storage unit 7.

After the test is completed, the coverage calculation section 8 obtains the number of instructions read within the address range indicated by the address range setting section 5 from the storage section 7, calculates the coverage, and the coverage display section 9 displays the calculation result.

〔Effect of the invention〕

As explained above, the present invention allows test coverage to be measured using hardware rather than a measurement program, so that test coverage can be measured even in a microcomputer system that does not have room to store a measurement program.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the present invention. 1...Central processing unit, 2...Main memory, 3...Address bus, 4...Memory read control line, 5 pins. ... Address range setting section, 6 ... Address reading section, 7 ... Storage section, 8 ... Coverage calculation section, 9 ... Coverage degree Display section.

Claims (1)

[Claims] In a microcomputer system consisting of a central processing unit and a main memory, there is an address range setting section that sets the address range of the instruction section of the program under test stored in the main memory, and a section that sets the address range of the instruction section of the program under test stored in the main memory, and a An address reading section that reads the address of the instruction from the address bus each time it is issued, and a storage section that has an address space equivalent to or larger than the main memory and records the number of times the instruction has been read at the same address as the address of the instruction read by the address reading section. A coverage measurement device for testing a microcomputer program, comprising: a coverage calculation unit that calculates coverage from recorded contents of a storage unit; and a coverage display unit that displays the calculated coverage.