JP2002312192A - Loading address recognizing method for dynamic link library, computer device, recording medium and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily recognize a loaded address in a main memory without using special software for analysis, when a nonconformity occurs in a dynamic link library. SOLUTION: When a DLL 70 is loaded on a main memory (MEM) 20 and then the DLL 70 is started by the application 40, a value (the load address value of DLL 70) of hModule by the execution of DLLMain is recorded in a registry 50, in advance of the primary execution of DLL.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of recognizing a load destination address of a dynamic link library suitable for application to debugging, failure analysis, and the like of a dynamic link library called as needed when executing an application program. The present invention relates to a computer device, a recording medium, and a program that handle an application program using a link library.

[0002]

2. Description of the Related Art In a computer system, when a predetermined application function is realized, a dynamic link library (hereinafter referred to as DLL) is used.

The DLL is called by an application as needed, and is dynamically loaded to a memory address on a main memory (main memory) and used.

At this time, the DLL is generally designed so that it can be loaded into an unspecified memory address except in special cases. Therefore, conventionally, when a problem occurs in the DLL, it is necessary to prepare and install analysis software in advance in order to check the memory address where the DLL is loaded.

As described above, since the DLL is dynamically loaded to an unspecified memory address, when a DLL failure occurs, when examining where the DLL is loaded in the main memory, Conventionally, it has been necessary to prepare and install dedicated analysis software in advance. Therefore, expensive special tools for failure analysis must be prepared and installed in advance, and thus there are various problems such as poor workability and a large economic burden.

[0006]

As described above, the DL
Since L is dynamically loaded to an unspecified memory address, if a DLL failure occurs, the conventional
In order to find out to which address L is loaded, special software for analysis must be prepared and installed in advance, which causes various problems such as poor workability and a large economic burden. was there.

[0007] The present invention has been made in view of the above circumstances,
A method for recognizing a load destination address of a dynamic link library, which can easily recognize where an address on the main memory has been loaded when a malfunction occurs in the DLL without requiring special software for analysis. ,
It is an object to provide a computer device, a recording medium, and a program.

[0008]

A DLL is dynamically loaded to a memory address in a main memory and can be used by an application. At this time, the DLL is generally
It is designed so that it can be loaded to an unspecified memory address. Since a memory address is unspecified to be loaded in this manner, if a malfunction occurs in the DLL, conventionally, analysis software is installed in advance to check at which address the DLL is loaded. However, in the present invention, the DLL itself acquires the address on the memory loaded at the time of starting the DLL from the OS notification prior to the original execution of the DLL, and stores the address information in a predetermined storage. By having a program step for recording in the area, the load address of the DLL can be known later without using special analysis software, and can be used for analysis of troubles and the like.

In the present invention, a program that uses (calls) a DLL acquires an address in a memory where the DLL is loaded from an OS notification, and records the address information in a predetermined storage area. By having a program step, it is possible to know the load address of the DLL later, and thereby, it is possible to record the load address of all the DLLs to be used, and to analyze a trouble or the like that has expanded the analysis range. The feature is that it can be used.

That is, a method of recognizing a load destination address of a dynamic link library (DLL) according to the present invention is as follows.
When the DLL is loaded on the main memory, the address information of the loading destination is recorded in a predetermined storage area so that the load address of the DLL can be recognized on the storage area at the time of debugging or malfunction analysis of the DLL. It is characterized by the following.

Further, a method of recognizing a load destination address of a dynamic link library (DLL) according to the present invention is provided.
When the DLL is loaded on the main memory, a program for acquiring the address information of the load destination and recording it in a predetermined storage area is provided in the DLL itself, and the DLL has the program when the DLL is loaded on the main memory. According to a program, the load destination address information is recorded in the storage area, and the load address of the DLL can be recognized on the storage area.

Further, a method of recognizing a load destination address of a dynamic link library (DLL) according to the present invention is provided.
When the DLL is loaded on the main memory, a program for acquiring the address information of the loading destination and recording the information in a predetermined storage area is provided in the application program using the DLL, and the application program calls the DLL. The address information of the load destination is recorded in the storage area in accordance with a program of the application program, and the load address of the DLL can be recognized on the storage area.

[0013] The computer device according to the present invention includes:
When a dynamic link library (DLL) is loaded on the main memory at the time of execution of the application program, a means for recording the address information of the loaded DLL in a predetermined storage area is provided. And

[0014] Further, a computer device according to the present invention comprises:
When a dynamic link library (DLL) is loaded on the main memory at the time of execution of the application program, a means for recording the address information loaded on the main memory in a predetermined storage area in accordance with the program of the DLL. It is characterized by becoming.

[0015] The computer device according to the present invention includes:
When a dynamic link library (DLL) is loaded on a main memory at the time of execution of an application program, address information loaded on the main memory is recorded in a predetermined storage area by a process according to the application program that called the DLL. It is characterized by comprising means.

Further, according to the present invention, in a computer-readable recording medium, when a dynamic link library (DLL) is loaded on a main memory, address information of the load destination is obtained and a predetermined A program for realizing the function of recording in the storage area is recorded.

The present invention also relates to a recording medium having a computer-readable dynamic link library (DLL) which is loaded on a main memory as needed when executing an application program, and wherein the DLL itself is used. A program for realizing a function of acquiring the address information of the load destination when loaded on the main memory and a function of recording the acquired address information in a predetermined storage area. And

Further, the present invention is a recording medium recording an application program for calling and using a dynamic link library (DLL) as needed, wherein the DLL is loaded on a main memory in the application program. At this time, a program for realizing a function of acquiring the address information of the load destination and a function of recording the acquired address information in a predetermined storage area are recorded.

Further, the present invention provides a computer for realizing a function of acquiring address information of a load destination and recording the information in a predetermined storage area when a dynamic link library (DLL) is loaded on a main memory. Is provided in a DLL or a program using the DLL.

By applying the present invention described above, when a problem occurs in the dynamic link library,
It is possible to easily recognize where the address is loaded in the main memory without the need for special software for analysis, so that when a problem occurs during the execution of the dynamic link library, The failure analysis can be performed easily and quickly.

[0021]

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

First, a first embodiment of the present invention will be described with reference to FIGS.

In the first embodiment of the present invention, Win
By having a program step for recording the loaded address in the dynamic link library (DLL) itself on the OS of Windows (registered trademark),
When a file is loaded on the main memory, a function of acquiring the address information of the load destination and recording it in a predetermined storage area is realized.

When a DLL is created, a MAP file is generated in advance. This MAP file is an existing file in which relative address information of each function in the DLL is recorded.

The address when the DLL loads is D
HModul of the first parameter of LLMain ()
e. The functions in parentheses in DLLMain are program functions that are executed whenever the DLL is loaded.

BOOL APIENTRY DLLMain (HANDLE hModule, DWORD ul) reason for call, LPVOID IpReserved) First parameter of DLLMain () hMod
The value of ule (the load address of the DLL set by the OS) is recorded in, for example, a registry or a file.

As described above, according to the present invention, the DLL Mai indicated by the notification of the OS that has not been used conventionally is indicated.
n using the load address value of the DLL set by the first parameter hModule of the n
By recording the load address value of L in a registry or a predetermined file at the time of starting the DLL prior to execution of the DLL (main body), the load address of the DLL can be recognized thereafter.

FIG. 1 shows the basic configuration at this time. Here, the DLL that uses the DLL
Is dynamically invoked, the DLLMain is executed, at which time the HANDLE hModule is executed.
The value set by the OS (memory address of DLL loaded on the main memory) is recorded in the registry (or file).

When a trouble or the like actually occurs, the address of the trouble is displayed from the OS similarly to the existing system. At this time, after calling the DLL, D
If the user wants to know the load address of the DLL, the load address of the DLL can be obtained by referring to the registry (or file).

To find out which function in the DLL caused the failure, the DLL recorded in the registry
By referring to the load address of the MAP file and the MAP file, it is possible to identify a defective portion.

A series of operations at this time will be described with reference to a flowchart shown in FIG. 2 and an operation explanatory diagram shown in FIG.
In FIG. 3, reference numeral 10 denotes a CPU for executing program processing of an application using the DLL which is a target of the present invention, and reference numeral 20 denotes a main area provided for a storage area for programs executed by the CPU 10 and a work area. Memory (ME
M) and 30 are external storage devices (EX) for storing various programs, files, and the like executed by the CPU 10.
M), 40 are applications (programs) that are called by the CPU 10 and are executed on the main memory (MEM) 20, 50 is a registry placed in the external storage device (EXM) 30, 60 is an external storage device (EXM) The DLL 70 placed on the main memory (MEM) 20 before being loaded on the main memory (MEM) 20 is the DLL loaded on the main memory (MEM) 20 from the external storage device (EXM) 30.
It is.

First, the application 40 placed on the main memory (MEM) 20 is stored in an external storage device (EX).
M) DLL 60 placed in 30 is dynamically called as required (see P1 in FIG. 3). The DLL 60 dynamically called as required by the application 40 is loaded as a DLL 70 on the main memory (MEM) 20 (see step S1 in FIG. 2 and P2 in FIG. 3).

At this time, the address of the DLL 70 loaded on the main memory (MEM) 20 is undefined, and the OS determines an appropriate address value each time the DLL 70 is loaded.

The DLL 7 is stored on the main memory (MEM) 20.
After the DLL 70 is started by the application 40 after the 0 is loaded (see P3 in FIG. 3), prior to the original execution of the DLL, the value of hModule by executing the DLLMain is set as the load address value of the DLL 70 and the registry 50 ( (See step S2 in FIG. 2, FIG. 3P4).

Thereafter, the original processing of the DLL 70 (processing of the DLL body) is executed (step S3 in FIG. 2). If a trouble occurs during the processing (step S4 in FIG. 2), the OS
Displays the address where the failure has occurred (step S5 in FIG. 2).

At this time, the defect analyzer who analyzes the above-mentioned defect stores the address information recorded in the registry 50,
The defective part can be analyzed based on the address displayed by the OS.

Next, a second embodiment of the present invention will be described with reference to FIG.

The second embodiment of the present invention is different from the first embodiment in that the DLL itself has a program for realizing a function of recording a load destination address in the DLL itself. In the embodiment, the address on the memory where the DLL is loaded is added to the program for loading the DLL by O.
By providing a program that obtains the address information from the notification of S and records the address information in a predetermined storage area, the load address of the DLL can be known later. The load address of all DLLs that are dynamically called can be recorded each time the DLL is called, and the range of analysis can be expanded.

The recording operation of the load address at this time is shown in FIG.
The operation will be described with reference to the operation explanatory diagram shown in FIG. In FIG. 4, the same parts as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.

The application 40 placed on the main memory (MEM) 20 is connected to an external storage device (EXM) 30
Is dynamically called as needed (see P11 in FIG. 4).

D placed in the external storage device (EXM) 30
The LL 60 is loaded as a DLL 70 at an undefined address on the main memory (MEM) 20 determined by the OS each time (see P12 in FIG. 3).

Further, at this time, the application 40
Prior to execution of the DLL, the load destination memory address of the DLL obtained from the OS is stored in the registry (or file) 5.
0 is recorded (see P13 in FIG. 3).

At this time, a function (API) called load library is always executed.
The return value of the load library (the load address of the DLL set by the OS) is recorded in the registry (or file) 50.

Thus, by referring to the registry (or file) 50, the load address of the DLL can be known at a later time. )
The defective part can be analyzed based on the address information recorded in the address 50 and the address displayed by the OS. In particular, when an application including a DLL is downloaded and operated, the load address can be recognized for all DLLs including the new DLL that are dynamically called by the application as needed. Debugging, trouble analysis, etc. of each DLL including the above can be performed easily and smoothly.

In each of the above embodiments, the DLL
Prior to execution of D, a program having a program for recording the load address of the DLL in a registry (or file)
The LL or the application, together with the configuration resident in the computer device, alone or with other programs,
For example, the present invention can be applied to any configuration that is stored in a recording medium such as a hard disk, a CD-ROM, a floppy disk, and a memory card and is appropriately used by an arbitrary device.

[0046]

As described above in detail, according to the present invention, when a problem occurs in the dynamic link library, special software for analyzing which address in the main memory has been loaded is required. Can be easily recognized without the need. Thus, when a failure occurs during the execution of the dynamic link library, the failure analysis can be performed easily and quickly.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure of the first embodiment.

FIG. 3 is an explanatory diagram of an operation in the first embodiment.

FIG. 4 is an operation explanatory diagram according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... CPU 20 ... Main memory (MEM) 30 ... External storage device (EXM) 40 ... Application (program) 50 ... Registry 60 ... DLL (D before loading on main memory)
LL) 70... DLL (DLL loaded on main memory)

Claims (14)

[Claims] When a dynamic link library is loaded on a main memory, address information of the load destination is recorded in a predetermined storage area, and when the dynamic link library is debugged or a failure is analyzed, the storage area is stored. A method for recognizing a load destination address of a dynamic link library, wherein the load address of the dynamic link library is recognized. 2. The dynamic link library according to claim 1, wherein when the dynamic link library is loaded on the main memory, a program for acquiring the address information of the load destination and recording the information in a predetermined storage area is provided in the dynamic link library itself. When the data is loaded on the main memory, the address information of the load destination is recorded in the storage area according to the program of the dynamic link library, and the load address of the dynamic link library can be recognized on the storage area. A method for recognizing a load destination address of a dynamic link library, characterized in that: 3. A program for obtaining address information of a load destination when a dynamic link library is loaded on a main memory and recording the information in a predetermined storage area is provided in an application program using the dynamic link library. When the application program calls the dynamic link library, the address information of the load destination is recorded in the storage area according to the program of the application program, and the load address of the dynamic link library is stored in the storage area. A method for recognizing a load destination address of a dynamic link library, characterized in that the method is capable of recognizing a dynamic link library. 4. When the dynamic link library is loaded on the main memory at the time of execution of the application program, there is provided means for recording address information of the loaded dynamic link library in a predetermined storage area. A computer device, comprising: 5. When the dynamic link library is loaded on the main memory at the time of execution of the application program, the address information loaded on the main memory is stored in a predetermined storage area in accordance with the program of the dynamic link library. A computer device comprising means for recording. 6. When the dynamic link library is loaded on the main memory at the time of execution of the application program, the address information loaded on the main memory by a process according to the application program that called the dynamic link library is stored in a predetermined location. A computer device comprising means for recording in a storage area. 7. When a dynamic link library is loaded on a main memory, the computer reads a computer program for realizing a function of acquiring address information of the load destination and recording the information in a predetermined storage area. Possible recording medium. 8. An application program is used by being loaded onto a main memory as needed at the time of execution of the application program.
A recording medium having a dynamic link library readable by a computer, wherein the dynamic link library itself has a function of acquiring address information of a load destination when the dynamic link library is loaded on a main memory; A machine-readable recording medium storing a program for realizing a function of recording information in a predetermined storage area. 9. A recording medium on which an application program for calling and using a dynamic link library as needed is recorded, wherein when the dynamic link library is loaded on a main memory in the application program, the loading is performed. A machine-readable recording medium storing a program for realizing a function of acquiring the above-mentioned address information and a function of recording the acquired address information in a predetermined storage area. 10. A program for realizing a function of causing a computer to acquire, when a dynamic link library is loaded on a main memory, address information of a load destination and record the acquired address information in a predetermined storage area. 11. A program included in a dynamic link library loaded and used on a main memory as needed when the computer is executing an application program, the program comprising:
When the dynamic link library is loaded on the main memory, a function of acquiring the address information of the load destination and a function of recording the acquired address information of the load destination in a predetermined storage area are realized. program. 12. A function included in an application program executed by a computer and using a dynamic link library, wherein the computer obtains, when the dynamic link library is loaded on a main memory, address information of the load destination. A function of recording the obtained load destination address information in a predetermined storage area. 13. A dynamic link library which is loaded and used on a main memory as needed when an application program is executed. When the dynamic link library is loaded on the main memory, address information of the load destination is acquired and a predetermined address is obtained. A dynamic link library having a program for causing a computer to execute a function of recording in a storage area. 14. An application program using a dynamic link library, when the dynamic link library is called, obtains address information on a main memory into which the dynamic link library is loaded, and saves the information. An application program including a program for causing a computer to execute a function of recording in an area.