JPH05181649A - Crossreference output device - Google Patents

Abstract

PURPOSE:To improve the development efficiency of a source program by constituting the device so that crossreference information to which the contents of a memory reference are added can be outputted and debugging can be executed simply, with respect to a specific symbol being an external symbol defined by a user, and also, a symbol to a memory, as crossreference information. CONSTITUTION:A crossreference generating means 10a for inputting plural source files 1a-1c, and outputting a crossreference information file 2a contains an anaylitic processing part 11a for analyzing the inputted source file and analyzing a fact that a symbol is an external symbol, and also, a specific symbol to a memory, a registration processing part 12a for registering whether the analyzed specific symbol is read-in, write-in or updating to the memory, as symbol information, and an output processing part 13a for outputting additionally this symbol information as an attribute at the time of outputting the crossreference information file 2a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a cross-reference creating apparatus for inputting a plurality of source files and creating and outputting a cross-reference information file of external symbols consisting of externally defined symbols or external reference symbols described by the user. To do.

[0002]

2. Description of the Related Art FIG. 11 is a block diagram showing a main part of such a conventional cross reference creating apparatus, and FIG.
FIG. 3 is a block configuration diagram showing an overview of the whole.

As shown in FIG. 12, a cross-reference output device 50 of this conventional example comprises an input / output device 30, an arithmetic unit 20 including a cross-reference creating means 10, and an external storage device 40.

The cross reference creating means 10
11, an analysis processing unit 11 that inputs and analyzes source files 1a, 1b, and 1c, a registration processing unit 12 that registers an external symbol, and an output process that outputs a cross-reference information file 2 are shown in FIG. And part 13.

Next, this cross reference creating means 1
The processing procedure of 0 will be described with reference to the flowcharts shown in FIGS. 4 and 13. Here, FIG. 4 shows the whole flow,
FIG. 13 shows the flow of the main body processing in FIG.

As shown in FIG. 4, first, an analysis process is performed on the file name specified at startup and the startup line of the subcommand (step S21). Next, source file 1
a, 1b and 1c are input (step S22), the source files 1a, 1b and 1c are analyzed, and a main process for generating a cross reference is performed (step S2).
3). Then, it is determined whether all the input files have been read (step S24), and the cross-reference information file 2 is output based on the main processing (step S25).
Finally, end processing is performed (step S26).

In this case, the main body process in step S23 is as follows. First, as shown in FIG.
One line of the symbol information of a, 1b or 1c is read (step S31), it is judged whether there is an external symbol declaration (step S32) until there is no line to be read (step S32), and if it is an external symbol declaration External symbol The name is registered (step S34). If the external symbol name is not declared, it is determined whether or not there is a registered external symbol in the line (step S35). If there is an external symbol, it is determined whether the external symbol is a memory definition or a reference (step S36). If the external symbol is a memory definition or reference, a source file name, a symbol name, a symbol definition or reference type, and a line number are registered as symbol information (step S37). If it is not an externally defined symbol, read the next line.

When there are no more lines to be read by repeating this (step S32), the main body process of FIG. 4 (step S32)
23) is completed, and the files are sequentially processed as shown in FIG.
After reading all input files (step S2
4) and the output of the cross reference information file 2 (step S25).

Next, a processing example will be described using an assembler as an example of a language processing program. In the assembler, machine instructions and registers, pseudo-instructions for instructing the operation of the assembler, and user-defined symbols are included in the assembler source file in accordance with the grammar of the assembler source. Here, it is assumed that there is a grammar shown in Table 1.

[0010]

[Table 1] For example, in the case of the source programs 101 and 102 of FIGS. 5 and 6 according to the grammar of Table 1, the cross reference information 107 as shown in FIG. 14 was output.

[0011]

Generally, when a user-defined symbol is described in the memory, there are three types of reference of the symbol: reading from the memory, writing to the memory, and updating of the memory.

However, in the above-described conventional cross-reference output device, since the information related to this is not incorporated in the output cross-reference information file, it is possible to know which of the three ways the memory is referred to. To do this, specify the source file name and the number of lines that refer to the symbol from the cross-reference information file, and visually check the line content at that location to see which of the three ways the memory is referenced. Had been determined.

In the debugging stage of the source program, when a portion where the contents of the memory are not as expected is found, it is important to find out where in the program this memory is written or updated. Here, conventionally, after finding the source file in which the symbol that operates this memory is described by the cross-reference information file, the description content of the part that describes the symbol that operates this memory in each source file It is necessary to visually check all the description locations of the source file, and if there are many symbol description locations you want to know or if there are many source files, it will take a lot of time to determine where you want to know. Therefore, there is a drawback that the development efficiency is lowered.

An object of the present invention is to eliminate the above-mentioned drawbacks and output information for reading, writing, or updating with respect to a memory for each external symbol,
It is to provide a cross-reference output device that can improve the development efficiency of a source program.

[0015]

According to the present invention, there is provided a cross-reference output device comprising cross-reference creating means for inputting a plurality of source files and creating and outputting a cross-reference information file of an external symbol. An analysis processing unit that analyzes the source file and analyzes that the symbol is the external symbol and a specific symbol for a memory;
A registration processing unit that registers whether the specific symbol is a read, write, or update to the memory as symbol information, and when outputting the cross reference information file, the symbol information is used as an attribute for the specific symbol. It is characterized by including an output processing unit for additionally outputting.

[0016]

When the symbol is a specific symbol that is both an external symbol and a memory reference symbol, information indicating whether the specific symbol is a read, write, or update of the memory area is added to the cross reference information as symbol information. Output.

Therefore, the source program can be debugged and the development efficiency of the source program can be improved simply by checking the cross-reference information file.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a main part of an embodiment of the present invention, and FIG. 2 is a block diagram showing an outline of the whole.

Cross-reference generator 5 of this embodiment
0a is, as shown in FIG. 2, an input / output device 30, an arithmetic device 20a including a cross-reference creating means 10a,
And an external storage device 40.

As shown in FIG. 1, the cross-reference creating means 10a, which is a feature of the present invention, analyzes the source files 1a, 1b and 1c and determines that the symbol is an external symbol and a specific symbol for the memory. An analysis processing unit 11a that analyzes that there is a certain symbol, whether the specific symbol is read or written in a memory,
Alternatively, it includes a registration processing unit 12a for registering whether it is updated as symbol information, and an output processing unit 13a for adding the symbol information as an attribute to the specific symbol and outputting the same when outputting the cross reference information file 2a. I'm out.

Next, this cross reference creating means 1
The processing procedure of 0a will be described with reference to the flowcharts shown in FIGS. Here, FIG. 4 shows the whole flow,
FIG. 3 shows the flow of the main processing in FIG.

As shown in FIG. 4, first, the file name designated at the time of startup and the startup line of the subcommand are analyzed (step S21). Next, a plurality of source files 1a, 1b and 1c are input (step S2
2), analyze the source files 1a, 1b and 1c,
Body processing for generating a cross reference is performed (step S23). Then, it is determined whether all the input files have been read (step S24), and the cross-reference information file 2a is output based on the main processing (step S24).
25) and finally, end processing is performed (step S26).

In this case, the main body process in step S23 is as follows.
Read one line of a, 1b or 1c (step S
1) Unless there are no more rows to read (step S
2) It is analyzed whether the declaration is an external symbol (step S3). If it is an external symbol declaration, the external symbol name is registered (step S4). If it is not an external symbol declaration, it is determined whether or not there is a registered external symbol in the line (step S5). If there is a registered external symbol, it is determined whether it is a memory definition or a reference (step S
6). If it is a definition or reference, it is determined whether it is a memory read (step S7). If it is a read, the source file name, symbol name, definition or reference type, line number, and read attribute are registered as symbol information. (Step S8), the next one line is read.

If the reading is not to the memory, it is determined whether the instruction in which the symbol is written is the writing to the memory (step S9). When writing to the memory area, source file name, symbol name,
The definition or reference type, line number, and write attribute are registered as symbol information (step S1).
0), read the next line.

If it is not a write to the memory, it is determined whether the instruction in which the symbol is written is an update to the memory (step S11). If the update is to the memory, the source file name, the symbol name, the definition or reference type, the line number, and the update attribute are registered as the symbol information (step S12), and the next line is read.

If it is not an update command for the memory, the symbol name, the type of definition or reference, the source file name, and the line number are registered as symbol information as the memory definition (step S13), and the next one line is read.

When there are no more lines to be read repeatedly (step S2), the files are sequentially processed and the output of the cross reference is started.

Thus, in the cross-reference output device of this embodiment, the source file name to which the user-defined symbol belongs, the symbol name, the definition or reference type, the line number,
An attribute indicating that the memory area is read, written, or updated can be output.

For example, in the case of the source programs 101 and 102 of FIGS. 5 and 6 according to the grammar of Table 1 using the assembler as the language processing program, the cross reference information 103 as shown in FIG. 7 can be output. Here, R indicates a read attribute, W indicates a write attribute, and M indicates an update attribute.

Next, an embodiment in which a C compiler is used as a language processing program will be described. Here, the difference from the embodiment using the assembler described above will be mainly described.

Declarators and operators can be described in the C source file according to the grammar of the C language source. Here, it is assumed that there is a grammar shown in Table 2.

[0033]

[Table 2] The main processing in this case is the same as that in FIG. For example, Table 2
Source program 10 of FIGS. 8 and 9 according to the grammar of FIG.
In the case of 4 and 105, the cross reference information 106 as shown in FIG. 10 can be output. Here, R indicates a read attribute, W indicates a write attribute, and M indicates an update attribute.

[0034]

As described above, according to the present invention, in addition to the conventional information on the symbol, information on the external symbol and the user-defined external symbol to the memory is read, written, or updated to the memory. Output.

As a result, when it is desired to know where the memory is being read from, where the memory is being written to, or where the memory is being updated, based on the file name and line number output to the cross reference output as in the conventional case. Since there is no need to check the contents of the description part for each symbol in multiple source files and visually determine whether to read, write, or update, you can get the part you want to know in a shorter time, Debugging can be done easily, and it has the effect of improving the development efficiency of source programs.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main part of an embodiment of the present invention.

FIG. 2 is a block configuration diagram showing an overview of the whole.

FIG. 3 is a flowchart showing the processing procedure of the main body processing.

FIG. 4 is a flowchart showing the overall processing procedure.

FIG. 5 is an explanatory diagram showing the source program 101.

FIG. 6 is an explanatory diagram showing the source program 102.

FIG. 7 is an explanatory diagram showing the cross reference information 103.

FIG. 8 is an explanatory diagram showing the source program 104.

FIG. 9 is an explanatory diagram showing the source program 105.

FIG. 10 is an explanatory diagram showing the cross reference information 106.

FIG. 11 is a block diagram showing a main part of a conventional example.

FIG. 12 is a block configuration diagram showing an outline of the whole thereof.

FIG. 13 is a flowchart showing the processing procedure of the main body processing.

FIG. 14 is an explanatory diagram showing the cross reference information 107.

[Explanation of symbols]

1a, 1b, 1c Source file 2, 2a Cross reference information file 10, 10a Cross reference creating means 11, 11a Analysis processing unit 12, 12a Registration processing unit 13, 13a Output processing unit 20, 20a Arithmetic device 30 Input / output device 40 External Storage device 50, 50a Cross reference output device 101, 102, 104, 105 Source program 103, 106, 107 Cross reference information S1 to S13, S21 to S26, S31 to S37 Steps

Claims (1)

[Claims] 1. A cross-reference output device comprising cross-reference creating means for inputting a plurality of source files and creating and outputting a cross-reference information file of external symbols, wherein the cross-reference creating means analyzes the source files. An analysis processing unit that analyzes that the symbol is the external symbol and is a specific symbol for the memory; and a registration processing unit that registers, as the symbol information, whether the specific symbol is reading, writing, or updating with respect to the memory, When outputting the cross reference information file,
An output processing unit that adds the symbol information as an attribute to the specific symbol and outputs the attribute information.