CN107168870B - Method for acquiring program information during operation - Google Patents
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- CN107168870B CN107168870B CN201710293491.7A CN201710293491A CN107168870B CN 107168870 B CN107168870 B CN 107168870B CN 201710293491 A CN201710293491 A CN 201710293491A CN 107168870 B CN107168870 B CN 107168870B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/36—Preventing errors by testing or debugging software
- G06F11/3604—Software analysis for verifying properties of programs
- G06F11/3612—Software analysis for verifying properties of programs by runtime analysis
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Abstract
The invention provides a method for acquiring program information during running, which comprises the following steps: step 1, creating an external program, wherein the external program comprises a method pointer registration module; step 2, starting a source program, calling a method pointer registration module of the external program through an operating system library, and transmitting a function address of the source program to the external program; and 3, the external program acquires the internal information of the source program according to the function address. The method avoids the transitional modification and intrusion of the source program, ensures the integrity of the source program and improves the analysis efficiency of the subsequent source program.
Description
Technical Field
The invention relates to the technical field of data analysis, in particular to a method for efficiently acquiring pointers, variables and the like of internal functions of a running-time program.
Background
In the existing software development, operations such as analysis and tuning of a source program are often required, and these operations all require tracking of internal information of a run-time program, for example, in a secondary development process of the source program, the source program needs to be analyzed in advance, acquisition and tracking of the internal information of the source program are involved, and in a software unit test, acquisition of the information of the source program is also involved.
The mainstream method for acquiring internal information in the current source program analysis is as follows: (1) adding a plurality of printing statements in a source program to print out local variables or global variables; (2) and other third-party tools such as gdb are used for operating the source program, so that the local variables and the global variables are observed in a single-step operation mode, and the workload is extremely large in a large project.
For the software unit test, because the internal function information is not easy to obtain, the input parameters are always preset, the expected value is given, and then the return value and the expected value of the method are compared, so that the method needs to establish a test environment, is troublesome to prepare input and output, and is not efficient.
Therefore, there is an urgent need for a method for acquiring internal data of a runtime program, which is efficient and can reduce modifications and intrusions to the source program as much as possible, and improve the analysis efficiency of the source program.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method for acquiring runtime program information, which avoids transient modification and intrusion to a source program, ensures integrity of the source program, and improves analysis efficiency of a subsequent source program.
The invention is realized by the following steps: a run-time program information acquisition method comprises the following steps:
step 1, creating an external program, wherein the external program comprises a method pointer registration module;
step 2, starting a source program, calling a method pointer registration module of the external program through an operating system library, and transmitting a function address of the source program to the external program;
and 3, the external program acquires the internal information of the source program according to the function address.
Further, the operating system library is a DLL library of Windows or a libdl.
Further, the internal information includes a thread ID and a global variable.
The invention has the following advantages: the interface of the source program is exposed to the external program, and the external program calls the main program to obtain the internal variable, so that the internal information of the source program is further obtained, a large amount of modification operation on the source program is not needed, the integrity of the source program is ensured, the influence on an analysis result caused by modification and intrusion of the source program is greatly reduced, and the analysis efficiency of the source program is greatly improved.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a flowchart of a runtime program information acquisition method according to the present invention.
Detailed Description
As shown in fig. 1, the method for acquiring runtime program information of the present invention includes the following steps:
step 1, creating an external program, wherein the external program comprises a method pointer registration module and a storage module for storing internal information;
step 2, starting a source program, calling a method pointer registration module of the external program through an operating system library, and transmitting a function address of the source program to the external program, wherein the operating system library is a Windows DLL library or a Linux libdl.so library;
and 3, the external program acquires the internal information of the source program according to the function address, wherein the internal information comprises a thread ID and a global variable.
Example one
In the analysis of the lightweight thread, taking a Linux system as an example, the method for acquiring the lightweight thread ID by adopting the method of the invention comprises the following steps:
creating an external program (library) including a method pointer registration module and a variable (void) for storing a method pointer;
starting a source program, calling a method pointer registration module (register _ profile _ func) of the external program through a dl library (api of libdl. so library) at a program entry (main function), exposing a source program internal method pointer to the external program, and storing the source program internal method pointer into the variable;
after the external program obtains the internal method pointer, the internal thread ID can be called and obtained at any time according to the method pointer.
In the embodiment, the interface of the source program is exposed to the external program, the external program calls the source program to acquire the internal lightweight thread ID, the acquisition of the lightweight thread information can be completed almost without modifying the source program, and an important basis is provided for later-stage source program analysis.
Example two
In the software unit test, the method of the invention is adopted to obtain the function pointer of the source program, and then the main program function is called to execute the test, taking the software unit test under the Windows system as an example, the method specifically comprises the following steps:
writing a test code and an external program in a DLL library, wherein the external program comprises a method pointer registration module for acquiring a function address;
in a source program, obtaining the operation right of a DLL (dynamic link library), calling a method pointer registration module of the external program through the DLL, and exposing an internal function address of the source program to the external program;
and calling the source program function in a DLL library according to the function address to execute the test.
Compared with the test by acquiring the input and output parameters, the test method has the advantages that the test speed is higher, the test efficiency is greatly improved, and the test quality is improved.
In the invention, the thread ID of the source program can be obtained, and the monitoring source program can be tracked by obtaining the internal global variable and the like according to the requirement, thereby being convenient for later analysis.
According to the method and the device, the internal information of the source program is obtained in a mode that the interface of the source program is exposed to the external program and the external program calls the source program, the internal information can be obtained almost without modifying the source program, the integrity of the source program is greatly protected, the internal function obtaining efficiency is improved, and therefore the analysis efficiency of the source program is improved.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (1)
1. A runtime program information acquisition method characterized by: the following process for obtaining the lightweight thread ID in the lightweight thread analysis for the Linux system is as follows:
so, creating an external program, said external program including a method pointer registration module register _ profile _ func and a variable void holding a method pointer (NULL);
starting a source program, calling a method pointer registration module of the external program through an api of a libdl.
And after the external program obtains the internal method pointer, calling and acquiring the internal thread ID at any time according to the method pointer.
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| CN201710293491.7A CN107168870B (en) | 2017-04-28 | 2017-04-28 | Method for acquiring program information during operation |
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| CN201710293491.7A CN107168870B (en) | 2017-04-28 | 2017-04-28 | Method for acquiring program information during operation |
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| CN107168870B true CN107168870B (en) | 2021-10-29 |
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| CN108052394B (en) * | 2017-12-27 | 2021-11-30 | 福建星瑞格软件有限公司 | Resource allocation method based on SQL statement running time and computer equipment |
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