JPH0793184A - Debugging device - Google Patents

Abstract

PURPOSE:To display information with respect to a file to which a debug target program is operated and to control the execution of the debug target program by using the information. CONSTITUTION:A command processor 20 receives a command from an input device 10, and stores a stoppage condition in a stoppage condition memory device 23 when it is a stoppage condition setting command, and acquires the information from a file operating information storage device 24 when it is a file operating information display command, and displays it on an output device 11. A program controller 21 sets a break point on a function with respect to a file operation in advance, and stored a file operating content in the file operating information storage device 24 when the debug target program 13 stops execution by the file operation, and also, inquires whether or not the execution should be stopped of a stoppage discrimination device 22. The stoppage discrimination device 22 decides the stoppage by comparing the stoppage condition in the stoppage condition storage device 23 with the information in the file operating information storage device 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a debug device for storing file operation information.

[0002]

2. Description of the Related Art Conventionally, a debug device of this type controls the execution of a debug target program by a command given from the outside, and checks the contents of the debug target program and the memory storing the program execution result, thereby It is used to discover the error.

A conventional debug device sets a breakpoint, which is a program stop function that can be set by a user, at an address corresponding to a line number of a designated source program, a function start address, or a function start address, A function that suspends execution when the debug target program executes the breakpoint setting part, and when the debug target program executes the breakpoint setting part Examine the contents of the program and program execution state and satisfy the specified conditions It has the function to stop the program execution only when it does, and the function to restart the interrupted program execution. It also has the function of referring to and setting the values of variables in the program to be debugged.
For these functions, the publications "EWS-UX Software Command Reference (a-1), EMY21-1," dbx (1) "issued by NEC Corporation in June 1993 can be referred to.

The operations performed on the file by the program include opening, closing, writing, reading, and moving the position in the file. Among these operations, operations other than open identify the file using the identifier given at the time of opening. For example, UNI
X operating system, file identifier, MS
-In DOS, an identifier called a handle is used.

[0005]

In the conventional debug device, a conditional expression using a variable name or the like in the source program can be used as a condition for execution stop, but only a specific number is used after the system call. Since the file identifier used in the program to be debugged and the file name cannot be matched, it is not possible to directly use the file name to describe the execution stop condition.

Further, since the reading operation from the file and the writing operation to the file are performed while sequentially moving the positions in the file, it is recognized which position range in the file a certain reading and writing operation is to be operated on. Cannot be used to describe the condition for execution stop using the position range in the file.

Further, since the data read from the file or written in the file is not checked, it is not possible to describe the execution stop condition using the value of the data read from the file or written in the file.

Further, since the information regarding the file accessed by the debug target program is not stored, the information regarding the file accessed by the debug target program cannot be displayed.

[0009]

A debugging device according to the present invention includes a file operation information storage unit for storing information on a file operated by a debug target program and information on operation contents of the file, and a debug target program operating on the file. Stop condition storing means for storing a condition to be stopped when performing the above, and command processing means for analyzing a command given from the input means, issuing a corresponding instruction, and displaying a processing result on the output means as necessary. In addition to the stopped state of the debug target program, the information stored in the file operation information storage means is compared with the condition stored in the stop condition storage means to determine whether to stop the execution of the program. The debug means for executing the instruction issued from the judging means and the command processing means When the program operates a file, the information about the file operation is stored in the file operation information storage means, the stop determination means is queried as to whether or not the execution of the debug target program is stopped, and when the program is stopped, Program control means for issuing a stop message to the command processing means and for restarting the execution of the debug target program if not stopped.

[0010]

An embodiment of the present invention will now be described in detail with reference to the drawings.

Referring to FIG. 1, one embodiment of the present invention is
Input device 10 such as a keyboard for inputting commands
An output device 11 such as a display device for displaying a response to the issued command, information about the file, and a stop message of the program to be debugged, a debug device 12 operated by a command from the input device 10, and a debug for operating a file. Target program 13 and file 14-1 operated by this debug target program
.About.14-n.

The debug device 12 analyzes the input command, and if it is a stop condition setting command, it may be the stop condition storage device 23, if it is a file operation information display command, it may be the file operation information storage device 24, or any other command. For example, the command processor 20 for issuing and processing the command corresponding to the program controller 21 and displaying the processing result on the output device 11 as necessary, the condition to be stopped when the debug target program 13 performs a file operation, that is, the file A stop condition storage device 23 that holds operations such as name, read, write, close, open, position range in the file, data value to be written to the file, and data value to be read from the file in a table as shown in FIG. ，
The debug target program 13 is a file 14-1 to 14-14.
A file operation information storage device for storing, for example, information such as a file name, a position in the file, a value of data to be written in the file, a value of data read from the file, and information about the operation content thereof regarding -n in a table as shown in FIG. 24, the stop condition relating to the file operation stored in the stop condition storage device 23 and the information regarding the current file operation stored in the file operation information storage device 24 as well as the stop state of the debug target program 13 given from the program control device; Stop determination device 2 for comparing whether or not to stop the program to be debugged
2, and a program controller 2 for controlling execution of a program to be debugged and for referring to and setting memory contents
1 is provided.

Next, the operation of the embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIGS. 1 and 2, when starting debugging of the debug target program 13, the program control device 21 sets a breakpoint in advance for a function or system call relating to file operation in the debug target program. Set (Step A
1).

The command processing device 20 waits for a command input from the input device 10 or a message from the program control device 21 notifying that the debug target program 13 has stopped (step A2).

When a command is input from the input device 10, the command processing device 20 analyzes the input command, and if it is a stop condition setting command, it is a stop condition storage device 23, and if it is a file operation information display command, it is a file. If it is a command other than the operation information storage device 24, a command corresponding to the program control device 21 is issued. If there is a response to the issued command, the response is displayed on the output device 11 (steps A3 to A5).

If the command is a stop condition setting command in step A5, the command processing device 20 stores the stop condition in the stop condition storage device 23 (step A).
6).

The stop condition storage device 23 holds the condition for stopping when the debug target program 13 performs a file operation in a table as shown in FIG. The file name column stores the file name of the file operation target of the debug target program 13, the operation content column stores the operation content of the file operation, and the condition column stores more detailed stop conditions. Especially, as a stop condition for file operation, the position in the file where the file operation is performed,
The position range in the file where the file is operated, the contents of the file contents that have been written / read, the combination of these conditions, and the like.

The file operation information storage device 24 holds a table as shown in FIG. The file name column is the name of the file on which the debug target program has performed file operations, the file identifier column is the file identifier given when the file was opened, and the position column is the debug target program 13 has performed file operations. Stores the position in the file

If the command is the file status display command in step A5, the command processing device 20 extracts the operation file 14-1 to 14-n related information of the debug target program 13 from the file operation information storage device 24, and the output device. 11 is displayed (step A8).

If the command is another command in step A5, the command processing device 20 processes the command while exchanging information with the program control device 21. As a method for the command processing device 20 and the program control device 21 to process other commands, a conventional debugger method can be used. Here, detailed description is omitted because it is not directly related to the present invention.

When the program to be debugged 13 has stopped execution, the program control unit 21 takes in the stopped state of the program to be debugged 13 and checks from the stopped state whether the program 13 has stopped at the breakpoint set in step A1. (Steps A3 and A
9). When the program is stopped at the breakpoint set in step A1, the information about the current file operation is stored in the file operation information storage device 24 (step A10),
After that, the stop determination device 22 is inquired whether to stop the execution of the program (step A11). The stop determination device 22 determines not only the stop condition relating to the file operation stored in the stop condition storage device 23 and the stop state of the program 13 given from the program control device 21 but also the current file operation stored in the file operation information storage device 24. Compare the information on the debug target program 13
Determine whether to stop.

When the stop determination device 22 determines the stop, the program control device 21 notifies the command processing device 20 of the stop, and the command processing device 20 notifies the output device 11 that the debug target program has stopped. Display and return to step A2 (step A13).

When the stop determination device 22 determines to continue the execution, the program control device 21 restarts the execution of the debug target program 13 and returns to step A2 (step A12).

Next, a specific example on the UNIX operating system will be described.

UNIX operating systems include:
As a system call to operate a file, open,
close, read, write, and lseek
And so on. The program controller 21 sets breakpoints for these system calls at the start of debugging.

When a command of "Stop the program to be debugged when data is read from the file named" file-A "" is input from the input device 10, the command processing device 20 causes the command processing device 20 to stop. In the table in the storage device 20, the file name column is "f.
ile-A "operation content column adds a read field. It is assumed that the command input from the input device 10 has created a table as shown in FIG.

The debug target program 13 is "file".
When "-A" is opened, the program is stopped at the breakpoint set in the open system call. The program control unit 21 operates the file name and the file attribute passed to the open system call and the file identifier returned from the open system call. Information storage device 2
Store in 4. Here, it is assumed that the file identifier returned from the open system call is the integer 3 (hereinafter, referred to as file identifier-3). After that, the stop determination device 22 is inquired whether or not to stop the program.

The stop determination device 22 determines that the current stop state is "file-A" open and the stop condition storage device 23.
Since that condition does not exist in the table in the table, the program control device 21 instructs the program control device 21 to resume the execution of the debug target program 13.

The debug target program 13 is "file".
When "-B" is opened, the program is stopped at the breakpoint set in the open system call. The program controller 21 operates the file name and file attribute passed to the open system call and the file identifier returned from the open system call. Information storage device 2
Store in 4. Here, it is assumed that the file identifier returned from the open system call is the integer 4 (hereinafter, referred to as file identifier-4). After that, the stop determination device 22 is inquired whether or not to stop the program.

The stop determination device 22 has a current stop state of "file-B" open and the stop condition storage device 23.
Since the condition exists in the table in the table, the program controller 21 instructs the command processor 20 to stop the execution.
Issue a stop message to. The command processing device 21 receives the message and displays a program stop message on the output device 11.

When the debug target program 13 reads the file identifier-3, it stops at the breakpoint set in the read system call.

The program control device 21 stores in the file operation information storage device 24 the file identifier passed to the read system call, the data read by the read system call, the size of the data, and the amount of movement of the position within the file. To do.

The position before reading is 28, and read
If 100 bytes of data are read by the system call, 128 is written in the position column of file identifier-3. Then, the program control device 21
Asks the stop determination device 22 whether to stop the program.

The stop determination device 22 uses the file identifier -3.
The file name "file-A" corresponding to the file is acquired from the file operation information storage device 24, and the current stop state is "f.
The stop determination device 22 recognizes “file-A” read.
The program control device 21 instructs the command processing device 20 to stop the execution because the condition of A "read exists.
Issue a stop message to. Command processing device 2
1 receives the signal and displays a program stop message on the output device 11.

When the debug target program 13 writes to the file identifier-3, it stops at the breakpoint set in the write system call.

The program control device 21 stores in the file operation information storage device 24 the file identifier passed to the write system call, the data written by the write system call, the size of the data, and the amount of movement of the position within the file. Store.

The position before writing is 128, and wri
If 10 bytes of data are read by the te system call, 138 is written in the position column of file identifier-3. After that, the program control device 2
1 inquires of the stop determination device 22 whether to stop the program.

The stop determination device 22 uses the file identifier -3.
The file name "file-A" corresponding to the file is acquired from the file operation information storage device 24, and the current stop state is "f.
Recognize that it is an ile-A "write.
It also recognizes that the write range is 128-138.
“Fil” is stored in the stop determination device 22 and the stop condition storage device 23.
Since the condition of e-A "write range 100-150 is satisfied, the instruction to stop the execution is issued, and the program control device 21 issues a stop message to the command processing device 20. The command processing device 21 receives the signal, A program stop message is displayed on the output device 11.

FIG. 6 shows an example of the contents of the table in the file operation information storage device during debugging of the debug target program 13.

[0041]

One of the features of the present invention is that information about files operated by the debug target program 13 is stored in the file operation information storage device 24, and the stop condition storage device 23 is operated each time the debug target program operates a file. The purpose is to compare the file name in the file with the file name being operated to determine whether to stop the execution of the program. Due to this feature, the present invention has an effect that a condition for stopping execution can be described using a file.

Another feature of the present invention is that a file operation information storage device 24 for storing information on files operated by programs is provided. Due to this feature, the present invention has an effect that the information regarding the file operated by the program can be easily displayed.

[Brief description of drawings]

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

FIG. 2 is a diagram for explaining the operation of one embodiment of the present invention.

3 is a diagram showing an example of a format of a table held in a stop condition storage device 23 in FIG.

4 is a diagram showing an example of a format of a table held in the file operation information storage device 24 in FIG.

5 is a diagram showing an example of contents of a table held in a stop condition storage device 23 in FIG.

6 is a diagram showing an example of the contents of a table held in the file operation information storage device 24 in FIG.

[Explanation of symbols]

 10 Input Device 11 Output Device 12 Debug Device 13 Debug Target Program 14-1 to 14-n File 20 Command Processing Device 21 Program Control Device 22 Stop Judgment Device 23 Stop Condition Storage Device 24 File Operation Information Storage Device

Claims (4)

[Claims] 1. A file operation information storage unit that stores information about a file operated by a debug target program and information about operation contents of the file, and a condition to be stopped when the debug target program operates on the file. Stop condition storing means for storing, command processing means for analyzing a command given from the input means, issuing a corresponding instruction, and displaying a processing result on the output means if necessary, a stop state of the debug target program, and A stop determination unit that compares the information stored in the file operation information storage unit with the condition stored in the stop condition storage unit to determine whether or not to stop the execution of the program, and is issued from the command processing unit. The instruction to be executed and the debug target program operates on the file. When it is performed, the information regarding the file is stored in the file operation information storage means, the stop determination means is inquired whether or not the execution of the debug target program is stopped, and when it is stopped, the command processing means is stopped. A debug device, comprising: a program control unit that issues a message and restarts execution of a program to be debugged if not stopped. 2. The file operation information storage means stores a file name as information about a file, the stop condition storage means stores a file name as a condition to stop, and the stop determination means operates a file name. 2. The debug device according to claim 1, wherein the debug is determined by stop. 3. The file operation information storage means stores a file name and position information in the file as information about the file, and the stop condition storage means stores a file name and a position range in the file as a condition to stop. The debug device according to claim 1, wherein the stop determination is performed using a file name operated by the stop determination means and position information in the file. 4. The file operation information storage means stores the value of data written in the file and the value of data read from the file as information about the file, and the stop condition storage means stores a file name and a file as a condition to stop. The stop determination means stores the value of the data to be written in and the value of the data to be read from the file, and the stop determination means makes a stop determination using the value of the data to be written to the file and the value of the data to be read from the file. The debug device according to claim 1.