JPH04367946A - Debug information output system - Google Patents

Abstract

PURPOSE:To select one piece information of the information in accordance with a debug state by outputting line number information in a primary source file as debug information, even in the case a secondary source file is inputted. CONSTITUTION:The system is provided with a secondary source file 8 generated by a pre-processor 7 as source program information, and a line number information table for showing the line number of a secondary source program corresponding to the line number of a primary source file 1. A syntax analyzing means is provided with a primary source debug information output processing part 231 for outputting the primary source line number, the secondary source line number, and a relative address of the secondary source program to an object file 3.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a debug information output method, and more particularly to a debug information output method for language processing programs.

0002

2. Description of the Related Art In a conventional debugging information output method, an executable file created from a source program written in a high-level language is debugged in the following manner. In other words, using application software called a high-level language debugger, while executing an executable file, the processing is stopped line by line in the source program (hereinafter referred to as a break), and each variable value and register value at the time of the break is recorded. This was done by displaying the information.

This is because the debug information table necessary for a high-level language debugger to perform line-by-line debugging of an input source program is generated through the following process.

[0004] First, a language processing program outputs a debug information table containing object information and information indicating the line number, that is, the serial number of each line constituting the input source program, and the relative address of the line. .

[0005] Next, the linker, which uses the aforementioned object file as an input file, determines the absolute address of the aforementioned debug information table in units of rows or structural blocks from the debug information table possessed by the object file and other object information. do. As a result, when the language processing program is executed, the linker generates object debug information that enables line-by-line debugging of the input source program that is compatible with high-level language debuggers, and converts this into an executable file (hereinafter referred to as a load module file). Output along with other information inside. A load module file is downloaded to a debugging device incorporating the high-level language debugger and executed. The line-by-line absolute address of the source program obtained from the line-by-line debugging information table is compared with the address of the load module file being executed captured by the debugging device, and if they match, processing is stopped. This allows the user to break in units of debug lines.

[0006] The high-level language debugger also has a function that allows symbol information, segment information, etc. to be output to a display device attached to the debugging device, and can be used in conjunction with the above-mentioned break function. This allows you to obtain various information when debugging a source program.

[0007] In this way, making line-by-line breaks possible using debug information output from a language processing program can be easily achieved by outputting line-by-line debug information to the load module file. .

However, in the conventional technology, a program (hereinafter referred to as a preprocessor) that performs processing to expand a specific number of source lines only with respect to some reserved words in a source description is used as a preprocessor before the execution of a language processing program. When processing is executed by inputting an output source program file (hereinafter referred to as a secondary source program) containing the expansion lines described above to a conventional language processing program, the source program before preprocessor processing is executed. In other words, line number information in the primary source program could not be output as debug information.

FIG. 9 shows an example of a conventional debug information output system.

In FIG. 9, the conventional debug information output method includes a primary source file 1, a preprocessor 10, a secondary source file 8, a language processing program 12, an object file 3, a keyboard 4, and a debug information storage. It was configured to include a file 5 and an object information storage file 6.

The language processing program 12 includes a starting line analysis section 21, an input section 22, a syntax analysis section 26, an object information generation section 24, and an object output section 25.

The object file 3 includes a debug information table 32 which is the output result of debug information output by the language processing program 2.

The above-mentioned components, except for the preprocessor 10 and the syntax analysis unit 26, are the same as those of the embodiment of the present invention to be described later, so their explanation will be omitted here.

Next, the operation of the conventional debug information output method will be explained.

FIG. 10 is a diagram showing the processing procedure of a conventional debug information output method. First, when the preprocessor 10 receives a primary source file 1 as shown in FIG. 5, it processes it and outputs a secondary source file 8 as shown in FIG. Next, the secondary source file 8 is input to the language processing program 12, debug information output processing is performed, and the result is output to the object file 3.

FIG. 11 is a flowchart showing the processing contents of the language processing program 12 in the conventional debug information output method.

Each processing function of the conventional language processing program 12 will be explained below with reference to the flowchart shown in FIG.

The processing flow of the conventional language processing program 12 includes an initialization process P1 for each variable such as a secondary source line number counter and a secondary source read pointer, a one-line source input process P2, and an end-of-source determination process P3. and end processing P4
, a secondary source line number count-up process P5, a relative address calculation process P6, a syntax analysis process P7, an object output process P8, and a line-by-line debug information table output process P9.

Here, the functions of each conventional process will be explained.

In the initialization process P1 of each variable, a secondary source line number counter and a secondary source read pointer are initialized. At this time, it is assumed that the secondary source line number counter is set to 0. Since the other variables are not particularly necessary for the explanation of the present invention, their initial values will not be particularly specified.

In the one-line source input process P2, the source program is read line by line from the secondary source file 8 currently pointed to by the read pointer. The read pointer after this points to the next line of the loaded source program.

The end-of-source determination process P3 is a process for determining whether or not the result of reading one line of the source program from the input file 1 in the one-line source input process P2 described above is the end of the input file 1. be.

End processing P4 is an end processing performed when the source end determination processing P3 indicates that the input file 1 has come to an end.

Secondary source line number count up process P5
is a process of counting up the number of lines read each time one line of the input source program is read.

Relative address calculation processing P6 is processing for calculating the relative address at which the loaded source program starts.

The syntax analysis process P7 is a process of analyzing the source program information read in the one-line source input process P2 to generate object information (segment information, symbol information, text code information, etc.).

The object output process P8 is a process for outputting the object information generated by the syntax analysis process P7 to the object file 3.

[0028] Line-by-line debug information table output processing P9
is a process of outputting the number of lines of the read secondary source program and its relative address to the debug information table 32 in the object file 3.

Next, while following the processing flow of the conventional language processing program 12, the debug information table 32 for each line or structure block shown in FIG. 12 is generated from the secondary source program shown in FIG. Explain the process.

First, a process P1 is performed to initialize the secondary source line number counter, secondary source read pointer, and other variables of the input source program.

Next, a one-line source input process P2 for reading a one-line source program from the secondary source file 8 is executed.

It is determined whether or not the source program information input by the one-line source input process P2 is at the end of the source program by the source end determination process P3. If the result of the determination is that it is the end, a termination process P4 is performed and the process is terminated. As a result of the determination, if it is not the end of the source program, a process P5 of counting up the secondary source line number
Then, relative address calculation processing P6 of the input source program is performed, and then syntax analysis processing P7 of one line of the input secondary source program is performed.

Syntax analysis processing P7 is one-line source input processing P
Analyze the source program information read in step 2 and generate object information. The object information generated by the parsing process P7 is output to the object file 3 by the object output process P8.

Finally, debug information table output processing P
Proceeding to step 9, the debug information table 32 of the line number information and relative addresses of the secondary source program is output to the object file 3 together with the object information previously generated in the syntax analysis process P7.

Next, debug information table output processing P9
After finishing, the process returns to the one-line source input process P2.

In this way, the conventional language processing program repeatedly outputs the object and debug information until the end of the source file 1 is reached, and stores the debug information line by line in the object file 3 in the debug information table. It was outputting to 32.

On the other hand, in the conventional language processing program 2 and subsequent processing, the linker first calculates an absolute address from the relative address in the debug information table 32 obtained from the object file 3 during link processing. Let's do it. As a result, a load debug information table similar to the debug information table 32, which displays the absolute address of each line output to the debug information table of each input object, is output to the load module file.

[0038]

[Problems to be Solved by the Invention] In the conventional debug information output method described above, line number information is output as debug information only from the input source file.
When a secondary source file that is the output of a language processing preprocessor is input, there is a drawback that line number information in the primary source program cannot be output as debug information.

[0039]

[Means for Solving the Problems] The debug information output method of the present invention includes a language processing preprocessor, means for inputting source program information, and analyzing the input source program information to generate debug information and object information. In the debugging information output method for a language processing program, the source program information includes a syntax analysis means for outputting the object information and the object outputting means for outputting the object information and the debugging information to an object file. A secondary source program that is an output source program including expanded lines generated by the language processing preprocessor by expanding a predetermined number of source lines related to reserved words, and line numbers of source lines of the primary source program. and a line number information table indicating a secondary line number which is a line number of a source line of the secondary source program corresponding to a certain primary line number, and the parsing means is configured to analyze the primary line number and the secondary line number. and object output means having a primary source program debug information output processing means for outputting the relative address of the secondary source program to the object file.

[0040]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

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

In FIG. 1, the debug information output method of the present invention includes a primary source file 1, a preprocessor 7 that preprocesses the primary source file 1, a secondary source file 8 output from the preprocessor 7, and a preprocessor 7. A line number information table 9 that is output from and shows line number information of the primary source file 1, and a language processing program 2.
, an object file 3, a keyboard 4, a debug information storage file 5 that stores debug information, and an object information storage file 6 that stores object information.

The language processing program 2 includes a startup line analysis section 21 that analyzes startup lines input from the keyboard 4, an input section 22 that inputs source program information from the input file 1, and a startup line analysis section 21 that analyzes startup lines input from the keyboard 4; A syntax analysis unit 23 that analyzes a source program and outputs object information, and an object information generation unit 24 that generates information for object files from information in two temporary files, a debug information storage file 5 and an object information storage file 6. , and an object output unit 25 that outputs generated object information and debug information to the object file 3.

The syntax analysis unit 23 includes a primary source debug information output processing unit 231 that outputs the primary line number, secondary line number, and relative address of the secondary source program to the object file 3.

The object file 3 includes a debug information table 31 output by the language processing program 2.

The object information stored in the object information storage file 6 is segment information, symbol information, text information, etc. output as the analysis result of the syntax analysis section 23.

FIG. 5 shows an example of the contents of the primary source file 1. The numbers on the left are line numbers of primary source file 1 added for explanation.

FIG. 6 shows an example of the contents of the secondary source file 8. The numbers on the left side are the line numbers of the primary source file 1 added for explanation and the corresponding line numbers of the secondary source file 8.

Next, the operation of this embodiment will be explained.

FIG. 2 is a diagram showing the processing procedure of the debug information output method of this embodiment. First, when the preprocessor 7 receives a primary source file 1 as shown in FIG. 5, it processes it and outputs a secondary source file 8 as shown in FIG. At the same time, a line number information table 9 as shown in FIG. 9 is output, in which line numbers of the secondary source program corresponding to line numbers of the primary source program are output. Next, the secondary source file 8 and the line number information table 9 are input to the language processing program 2 equipped with the primary source debug information output processing section 231 , where debug information output processing is performed and the results are output to the object file 3 .

FIG. 3 is a flowchart showing the processing contents of the language processing program 2 in the debug information output method of this embodiment.

Each processing function of the language processing program 2 of this embodiment will be explained below with reference to the flowchart of FIG.

Here, differences from the conventional processing flowchart shown in FIG. 11 described above will be explained. In FIG. 3, the processing contents of processes P2 to P9 are the same as those in the conventional processing flowchart shown in FIG. 11, and since the explanation will be redundant, the explanation will be omitted except for points directly related to the present invention.

First, the initialization process S1 of each variable initializes the primary source line number counter and the line Initialize the number information table pointer. At this time, the secondary source line number counter is set to 0, and the primary source program line number counter is set to 1.
shall be set respectively.

Next, after object output processing P8,
The primary source debug information output processing unit 231 performs primary source debug information output processing S2.

FIG. 4 is a flowchart showing details of the primary source program debug information output processing S2.

First, it is determined whether the secondary source line number information pointed to by the current line number information table pointer of the line number information table 9 output from the preprocessor 7 matches the current secondary source line number counter. A row number information table determination process S21 is performed. If the two pieces of information do not match, the primary source program debug information output process S2 is ended. If both pieces of information match, a primary source line number counter value output process S22 is performed, which is a process of outputting the value of the primary source line number counter to the line number information section of the debug information table 31.

Next, a primary source line number count up process S for counting up the primary source line number counter
Do 23.

Finally, set the line number information table pointer to 1.
Advance row number information table pointer up process S24
Then, the primary source debug information output process S2 is completed.

As described above, the language processing program 2 generates debug information line by line together with object information up to the last line of the secondary source file 9. At this time, it becomes possible to output line number information of the previous primary source file 1 through the processing of the preprocessor 7 to the same load module file at the same time.

[0061] As a result, the processing after the language processing program 2 is as follows. First, the linker uses the debug information table 31 obtained from the object file 3 mentioned above.
During link processing, the object performs processing to obtain the absolute address from the relative address of the object. This makes it possible to output to the module file a load debug information table similar to the debug information table 31 filled with absolute addresses for each line of each input object.

[0062]

As explained above, the present invention provides a secondary source program generated by a language processing preprocessor as source program information, and a line indicating the line number of the secondary source program that corresponds to the line number of the primary source program. and a number information table, and the syntax analysis means includes a primary source program debug information output processing means for outputting a primary source line number, a secondary source line number, and a relative address of the secondary source program to an object file. Even if a secondary source file is input, the line number information in the primary source program can be output as debugging information, so that one of these pieces of information can be selected depending on the debugging situation. There is.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a debug information output method of the present invention.

FIG. 2 is a diagram showing a processing procedure of a debug information output method according to the present embodiment.

FIG. 3 is a flowchart showing an example of the operation in the debug information output method of the present embodiment.

FIG. 4 is a flow chart showing an example of the operation of the primary source program debug information output processing section in the debug information output method of the present embodiment.

FIG. 5 is a diagram showing an example of a primary source file.

FIG. 6 is a diagram showing an example of a secondary source file.

FIG. 7 is a diagram showing an example of a row number information table.

FIG. 8 is a diagram showing an example of the contents of a debug information table according to the present embodiment.

FIG. 9 is a block diagram showing an example of a conventional debug information output method.

FIG. 10 is a diagram showing a processing procedure of a conventional debug information output method.

FIG. 11 is a flowchart illustrating an example of an operation in a conventional debug information output method.

FIG. 12 is a diagram showing an example of the contents of a conventional debug information table.

[Explanation of symbols]

1 Primary source files 2, 12 Language processing program 3 Object file 4 Keyboard 5 Debug information storage file 6 Object information storage file 7, 10
Preprocessor 8 Secondary source file 9 Line number information table 21 Starting line analysis unit 22 Input units 23, 26 Syntax analysis unit 24 Object information generation unit 25 Object output unit

Claims (1)

[Claims] 1. A language processing preprocessor, means for inputting source program information, syntax analysis means for analyzing the input source program information and outputting debug information and object information, and analyzing the object information and the object information. In a debug information output method for a language processing program, the source program information includes a predetermined number of source lines related to a predetermined reserved word of a primary source program. a secondary source program that is an output source program including expanded lines that are expanded and generated by the language processing system preprocessor; and a secondary source program that corresponds to a primary line number that is a line number of a source line of the primary source program. and a line number information table indicating a secondary line number that is a line number of a source line, and the parsing means converts the primary line number, the secondary line number, and the relative address of the secondary source program into the object file. and object output means having a primary source program debug information output processing means for outputting primary source program debug information.