JPS6111853A - Information processor - Google Patents

Abstract

PURPOSE:To test the propriety of the contents of data without reducing the efficiency of data processing by operating a testing means in parallel with the execution of a program. CONSTITUTION:An information processor 2 executes the program, reads out data to be processed from a main storage device 1 and receives the read-out data to a register 3. The data in the register 3 are transferred to the body part 10 of the processor 2 to execute processing such as the calculation of the data and also inputted to the testing means 4. The testing means 4 stores the data in a register 5, compares the contents of the register 5 with a matching pattern read cut from a matching pattern memory 6 by a comparator 7, and if there is no coincidence as the result of comparison with all the matching patterns in the memory 6, ends the test. If the coincidence is detected in the comparator 7, the means 4 stops the test at the time of detection and requests an interruption to the body part 10 of the processor 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information processing apparatus having an independent mechanism for checking the validity of the contents of processed data.

In order to maintain the reliability of processing by an information processing device, the validity of processed data is checked.

Generally, for formal data checks, such as parity checks, so-called hardware-configured test circuits are installed at various points within an information processing device, and these circuits are installed in parallel with the original processing of the data by a program. The test is configured to be performed by

The present invention relates to means for checking the validity of data, such as checking whether the data falls within a numerical range handled by an information processing device.

[Problems to be solved by the prior art and the invention] In conventional information processing devices, there is no hardware mechanism that directly performs content validity checks on data, and the checks are left to the program. When such an inspection was required, it was necessary to insert a program for the inspection into the data processing program. This meant that processing time was wasted just for the inspection, and it took away from the original purpose of processing. This resulted in a decrease in processing efficiency.

In addition, if you miss a point where it is desirable to insert an inspection program, if you run that program and encounter data with inappropriate content, processing results that the programmer did not predict may occur. Unfortunately, it is generally relatively difficult to investigate the cause of such unexpected phenomena, which may result in a significant decrease in the efficiency of data processing.

[Means for solving problems]

As a means for solving the above-mentioned problems, the present invention maintains one or more collation patterns when reading data from a main memory in order to execute a program and process the data. An information processing device comprising a checking means for generating an interrupt signal when the content matches at least one of the matching patterns, and configured such that the checking means operates in parallel with execution of the program. provide.

[Effect]

That is, for example, an inspection mechanism configured with hardware is provided, and this inspection mechanism stores one or more matching patterns that correspond to invalid content, matches it with data read from the main storage device for processing, and detects a match. In this case, an interrupt signal is generated.

As is generally done, an interrupt signal is a signal that interrupts a program being executed on an information processing device and forcibly starts execution of another predetermined program, and the program performs appropriate error handling, etc. It is possible.

The inspection operation by the above-mentioned inspection mechanism does not interfere with the execution of the data processing program and is configured to operate independently and in parallel with the execution of the program, so the efficiency of data processing will not be reduced due to inspection. None.

Furthermore, if there is such a checking mechanism, one of the matching patterns can be stored in advance in each word in the required storage area of the main storage device, so that when data in the area is subsequently processed, the processing This area can be used to automatically check whether valid data has been entered.

〔Example〕

The figure shows an embodiment of the invention.

The main memory 21 stores data and the like. The information processing device 2 executes a program using a known method, reads data to be processed from the main storage device 1, and receives the data in the register 3.

The data in the register 3 is transferred to the main body 10 of the information processing device 2, where it is subjected to processing such as arithmetic operations using a known method, and is also input to the inspection mechanism 4.

The inspection mechanism 4 holds data in the register 5, and
A comparison circuit 7 compares the contents of the comparison pattern with a verification pattern read from the verification pattern memory 6, and if they do not match, the next verification pattern is read from the verification pattern memory 6 and input to the comparison circuit 7. As a result of comparison with all the matching patterns in the matching pattern memory 6 in this way, if there is no match, the test ends.

If there is a match in the comparison by the comparator circuit 7, the test is stopped at that point, and a match signal is output as an interrupt signal 8, thereby requesting an interrupt from the main unit 10 of the information processing device 2.

An error processing program is activated in the main unit 10 by the interrupt, and it is possible to clean up the data being processed and collect status data for investigating the cause of the error.

The verification pattern memory is composed of, for example, a read-only storage device, and stores one or more verification patterns. One matching pattern consists of the same number of bits as the data read into register 3 or less, for example, °10000...-000, which is not generally used as an integer.
” etc. are the patterns to be inspected.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, it is possible to test the content validity of data without reducing data processing efficiency, thereby improving the performance and reliability of information processing equipment. It has significant industrial effects.

[Brief explanation of drawings]

The figure is a block diagram of the configuration of an embodiment of the present invention. In the figure, 1 is a main storage device, 2 is an information processing device, 3.5 is a register, 4 is an inspection mechanism, 6 is a verification pattern memory, 7 is a comparison circuit, and 10 is a main body. Agent Patent Attorney Weighing Koshibe 130≦

Claims (1)

[Claims] When reading the data from the main memory in order to execute a program and process the data, one or more matching patterns are retained and the content of the data matches at least one of the matching patterns. An information processing apparatus comprising: a test means for generating an interrupt signal, and the test means is configured to operate in parallel with execution of the program.