JPS6063637A - Recording system for history information - Google Patents

Abstract

PURPOSE:To execute respective instructions of respective codes written in specific language while interpreting them by detecting, for example, an assignment instruction and storing the history of this assignment instruction in a specific area of a storage part automatically. CONSTITUTION:When one instruction is read out and set in an instruction register 11, it is compared 14 with history information which is set in a history information which is set in a history information register 13 previously. Consequently, when a coincidence signal (c) is obtained, a control part 19 gates gate circuits G1 and G2 to store the address in the source code of this instruction in an address storage register 16 and the execution result in a register 17. This stored information is stored successively in an area 21 indicated by a storage address register 18 every time the coincidence signal (c) is obtained by a comparator 14. Its contents are read out and checked to know the history of the specified variable, and the debugging and inspection of the source code are facilitated.

Description

Detailed Description of the Invention +111 Technical Field of the Invention The present invention relates to a computer system that executes each instruction of a source code written in a specific language while interpreting the instructions, and the invention relates to a computer system that interprets and executes each instruction of a source code written in a specific language. This relates to a method for recording historical information.

(bl Background of technology) As data processing systems have become larger in recent years, the scale of the programs that are executed is also becoming larger. It is supposed to be designed.

When debugging and inspecting the A-, M7' program at the source code level, it is practically difficult to debug it with multiple designers; for example, only one designer can easily debug the source code. The emergence of an effective software program that can debug and inspect code has been awaited.

(cl Prior Art and Problems) Conventionally, for debugging and inspecting source code, for example, when an assignment instruction in the source code is executed, if you want to know the history information of a specific variable of the assignment instruction, I had to insert a statement that outputs the variable value at the required place and execute it again.

On the other hand, tools such as debuggers have been developed, but they have complicated usage conditions, or only display the final change value.
Many of them were insufficient as historical information on variables, such as those that only displayed values when a variable value changed.

fti+ Purpose of the Invention In view of the above-mentioned drawbacks of the conventional art, the present invention is designed to detect, for example, an assignment instruction and calculate the variable value of the assignment instruction in a computer system that interprets and executes each instruction of a source code written in a specific language. The purpose of this invention is to provide a method for automatically storing the history of data in a specific area of a storage unit.

According to the present invention, in a computer system that executes each instruction of a source code written in a specific language while interpreting it, there is provided a first means for detecting a specific instruction; a second means for multiplying addresses on the source code of an instruction, a third means for accumulating the execution results of the specific instruction, and a history information storage area in the storage section of the computer system, This is achieved by providing a method for storing history information accumulated by the second means and the third means in the history information storage area when the detection method is obtained by the first means. For example, by simply inputting a variable name and an assignment instruction for the variable name from the outside, a specific variable name can be set.Embodiments of the InventionEmbodiments of the present invention will now be described in detail with reference to the drawings.

The figure is a block diagram showing an embodiment of the present invention,
1 is a computer that interprets and executes each instruction of the source code, 2 is its main memory, jl is an instruction register (Ill), 12 is an address register (^R),
13 is a history information register (TIR) that stores information to be recorded in history when the source code is executed, such as variable names and assignment instructions for the variable names; 14 is an instruction register (Ift) II; and a history information register. (
A comparator (GOMP) that compares TIR) 13 and outputs a match signal (C) when the conditions match.

15 is an interpretation execution unit (IPT) that fetches each instruction of the source code, interprets and executes it; 16 is a comparator (COMP); when a match signal (C) is obtained in 14, the source code of the instruction is Address storage register (ASR) that stores addresses in the code, 17 is a comparator (
COMP) 14, an execution result storage register (IPTSR) 18 stores the execution result of the interpretation execution unit (IPT) 15 when a coincidence signal (C) is obtained.
is the comparator (COMP) 14, the coincidence signal (C)
When the address storage register (ASI?) is obtained, the address storage register (ASI?)
A storage address register (SAR) that generates an address for sequentially storing the contents of 1B and execution result storage register (IPTSR) 17 in the history information storage area 211 in the main storage section 21 of the main storage device 2. , 19 is the overall control unit <cTL>, 17L182 is an OR circuit,
181 is a +1 circuit that stores history information in history information storage area 2.
11 is executed every time the program is stored. 61 to G5 are gate circuits.

When this computer system operates, first, the address register (AR) 12 and the storage address register (
SAR) 18 is set to an initial value (for example, all "0").

Now, in the computer 1 which executes each instruction of the source code written in a specific language while interpreting it, the logical rlPF182
When the main memory 2 is accessed through the memory 2 and one instruction is read out and set in the instruction register (Ift) 11, the history information previously set in the history information register (TIR) 13 (this example In , the specified variable for which the history is to be recorded is set to ■, and the assignment instruction for the variable I)
are compared.

Then, if the instruction matches the condition, the comparator (C
OMr') 14 outputs a coincidence signal (C) and sends it to the control unit (CT1.) 19.

In the computer I, the instructions stored in the instruction register (TR) 11 are taken into the interpretation execution unit (TPT) 15, and the instructions are executed while being interpreted, and the above coincidence signal (C) is obtained. Then, the control unit (CTL) 19 gates the gate circuits G1 and G2 at appropriate timing, and stores the address of the source code width and the execution result of the instruction in the address storage register (A).
SR) 16 and execution result accumulation register (rPTsR)
Accumulates to 17.

Further, the interpretation execution unit (IPT) 15 calculates the address of the next instruction based on the interpreted instruction and stores it in the address register (8R) 12.

The above accumulated information (in this embodiment, the address of the assignment instruction and the value of variable ■) is stored in the storage address register (SAR) 18.
The comparator (
Each time a match signal (C) is obtained in the COMP) 14, the control unit (CTL) 19 increases the value of the storage address register (SAI?) 18 by 1 while controlling the gate circuit G3.
Gll G5 is gated and controlled to be stored sequentially.

In this manner, in this embodiment, each time an assignment instruction for a specified variable I is executed, its address and variable value are added to the history information storage area 211 of the main storage device 2.

In this way, regarding the accumulated history information of assignment instructions for a certain variable (the address of the assignment instruction and the value of variable I),
By reading and examining the contents of the history information storage area 211 when execution of the source code is interrupted or terminated, the history of the designated variable 1 can be known, and the source code can be easily debugged and inspected.

In this embodiment, the history information set in the history information register (TII?) 13 was explained using a certain variable 1 in the source code and an assignment instruction for that variable.
Needless to say, it is not limited to this.

fgl Effects of the Invention As described above in detail, the history information recording method of the present invention stores information in the history information register in advance in a computer system that executes each instruction of a source code written in a specific language while interpreting it. By simply setting the conditions for recording the history when the above source code is executed (for example, a variable ■ and an assignment instruction for that variable, etc.), the history data for the history condition will be stored in the history information storage area in the main memory. Therefore, by reading the contents of the history information storage area when the execution of the source code is interrupted or finished, it is possible to obtain history data related to the specified history information. This has the advantage that source code can be easily debugged and inspected.

BRIEF DESCRIPTION OF THE DRAWINGS The figure is a block diagram showing an embodiment of the present invention. In the drawing, 1 is a computer that executes the source code while interpreting it, 2 is a main memory, 211 is a history information storage area, 11 is an instruction register (IR), 12 is an address register (AI?7), and 13 is a history information register. (TTR
'), 14 is a comparator (Co gate P), 15 is an interpretation execution unit (IPT), 16 is an address storage register (8SR), 17 is an execution result storage register (IPT).
SR), 1B is storage address register (SAR)
, Gl~G5 are gate circuits. are shown respectively.

Claims (1)

[Claims] In a computer system that executes each instruction of a source code written in a specific language while interpreting the instruction, the computer system includes a first means for detecting a specific instruction, and a second means for accumulating an address on the source code of the specific instruction. , a third means for accumulating the execution results of the specific instruction, and a history information storage area in the storage section of the computer system, and when a detection output is obtained by the first means, the second means A history information recording method characterized in that history information that has been multiplied by M and a third means is stored in the history information storage area.