CN109308256A - A kind of java dynamically analyzing of program method, equipment and storage medium - Google Patents
A kind of java dynamically analyzing of program method, equipment and storage medium Download PDFInfo
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- CN109308256A CN109308256A CN201810817527.1A CN201810817527A CN109308256A CN 109308256 A CN109308256 A CN 109308256A CN 201810817527 A CN201810817527 A CN 201810817527A CN 109308256 A CN109308256 A CN 109308256A
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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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- 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
- G06F11/3668—Software testing
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- G06F11/3684—Test management for test design, e.g. generating new test cases
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Abstract
The application provides a kind of java dynamically analyzing of program method, comprising: the preordering method of character string string class in modification java development kit；For the incoming parameter assignment of program to be analyzed, the assignment includes pre-buried character string；Program to be analyzed described in Dynamic Execution, determine whether two character strings compared include pre-buried character string, it is pre-buried character string in response to a character string in described two character strings, using another character string in described two character strings as the key parameter values of the program to be analyzed.Method provided by the present application can analyze and directly carry out the dynamic analysis of program without syntax and semantics.
Description
Technical field
The present invention relates to computer fields, in particular to a kind of java dynamically analyzing of program method, equipment and storage
Medium.
Background technique
With the continuous expansion of software size, measurement scope and workload are also increase accordingly, in order to reduce to greatest extent
Cost of labor improves testing efficiency effect simultaneously, provides software system security and robustness, automated procedures analysis, automation
Test cases generates and the automatic tests directions such as execution are the directions that researcher constantly explores.
The direction of software system architecture towards loose coupling, light interface, weight framework, weight container was developed in recent years, system complex
Degree constantly rises, and the code analysis mode based on general syntax and semantics analysis is difficult to adapt to the software systems of continuous complexity,
Its application range is restricted.
Summary of the invention
Embodiment of the present invention provides a kind of java dynamically analyzing of program method, obtains the key in program to be analyzed automatically
Parameter value and the resource situation of routine call, to automatically generate for test cases, program validation, program quality and leakage
Hole detection, coverage analysis etc. provide basic data, avoid the code analysis mode based on the syntax and semantics analysis of transmission, because
, to more complicated software, ease for use is more preferable for this.
In a first aspect, embodiment of the present invention provides a kind of java dynamically analyzing of program method characterized by comprising
Modify the preordering method of character string string class in java development kit；For the incoming parameter assignment of program to be analyzed, the assignment
Including pre-buried character string；Program to be analyzed described in Dynamic Execution determines whether two character strings compared include pre-buried character
String is pre-buried character string in response to a character string in described two character strings, by another in described two character strings
Key parameter values of the character string as the program to be analyzed.
Second aspect, embodiment of the present invention provide a kind of computer equipment, including memory and processor, wherein deposit
Reservoir is stored with computer instruction；Processor is configured to run the computer instruction so that the computer equipment executes the
Method described in one side.
The third aspect, embodiment of the present invention provide a kind of computer readable storage medium, are stored thereon with computer and refer to
It enables, the computer instruction realizes method described in first aspect when being stored by execution.
Detailed description of the invention
Fig. 1 shows the flow diagram of the java dynamically analyzing of program method of embodiment according to the present invention.
Fig. 2 shows test cases according to an embodiment of the present invention.
Fig. 3 shows code snippet screenshot according to an embodiment of the present invention.
Fig. 4 shows code snippet screenshot according to an embodiment of the present invention.
Fig. 5 shows code snippet screenshot according to an embodiment of the present invention.
Fig. 6 shows the structural schematic diagram of computer equipment according to an embodiment of the present invention.
Specific embodiment
It is described in detail to various aspects of the present invention below in conjunction with the drawings and specific embodiments.Wherein, many institute's weeks
Module, unit and its mutual connection, link, communication or the operation known are not shown or do not elaborate.Also, institute
Feature, framework or the function of description can combine in any way in one or more embodiments.Those skilled in the art
Member is it should be appreciated that following various embodiments are served only for the protection scope for example, and is not intended to limit the present invention.May be used also
To be readily appreciated that, module or unit or processing mode in each embodiment described herein and shown in the drawings can by it is various not
It is combined and designs with configuration.
The process signal of the java dynamically analyzing of program method of embodiment according to the present invention is shown referring to Fig. 1, Fig. 1
Figure, this method can include: step S101, step S102 and step S103, next in conjunction with specific embodiments to above-mentioned steps
It is illustrated.
Step S101 modifies the preordering method of character string string class in java development kit.
In an embodiment of the present invention, the source generation to the character string string class in java development kit is needed according to analysis
Code, for example, the corresponding source code of equals method of string class.
It should be noted that the modification of string class is not limited to equals method, it can also be according to exploitation needs pair
The get method of HashMap, length method of String class etc. are modified.
It step 102, is the incoming parameter assignment of program to be analyzed, the assignment includes pre-buried character string.
In an embodiment of the present invention, program to be analyzed can be java method to be analyzed.Obtain program to be analyzed
Incoming parameter can include: obtain the type of the input parameter of method to be analyzed, generate the ginseng for meeting the type of the input parameter
Number list, to be passed to the method to be analyzed for the parameter value list as parameter.Wherein, the input parameter of acquisition can
Including entity class.The input parameter for obtaining method for testing to be measured can use the reflection mechanism of java language.If it is real for inputting parameter
Body class, can use java language reflection mechanism obtain the entity class attribute type and set method.According to acquisition
The parameter value list that the type of input parameter generates the type for meeting the input parameter can make the parameter of entity class
With set method to the attribute assignment of the entity class.Pre-buried character string can be the spcial character automatically generated using java script
String, it is different from the character string of common meaning, to mutually be distinguished with the parameter in program to be analyzed.
Step S103, program to be analyzed described in Dynamic Execution determine whether two character strings compared include pre-buried word
Symbol string is pre-buried character string in response to a character string in described two character strings, will be another in described two character strings
Key parameter values of a character string as the program to be analyzed.
In the embodiment of the present invention, do not know the source code of program to be analyzed and do not use java syntax and semantics
Under conditions of analytical tool, the method for obtaining the key parameter values of program to be analyzed can modify the core classes of modification java
The source code of java.lang.String records parameter value in the method for calling to String.
In some embodiments, java dynamically analyzing of program method may also include that the key parameter for obtaining program to be analyzed.
Specifically, can include: static label flag is set in the string class and increases the set method of the label,
Wherein, the label is used to control the coverage of custom code in the character string string class, and string class can be
Java core classes java.lang.String；Increase the side get of static queue and the static queue in the string class
Method modifies the equals method of the character string string class, when to run the equals method, two words being compared
The static queue is recorded in symbol string, and modified string class is packaged into jar packet and is added to the java of program to be analyzed
Running environment, and high priority and path are set by priority and original string class one is shown and covers original character
The code of string string class, original string class are original java.lang.String.
Label flag in the embodiment of the present invention may include two values, and a value is true, and expression goes to string class
Method when execute customized code, another is false, and expression is not executed when going to the method for string class and made by oneself
The code of justice.The embodiment of the present invention can control the coverage of custom code in String class by setting label, so that
Any code modified in String class only has an impact when analyzing program and needing, without influencing whether entire java program
Run life cycle, it is ensured that program safety operation.In some embodiments, the pseudocode of equals method can be such that
Equals method (comparand symbol string parameter)
Judge whether flag is executable custom code, it is executable then continue to execute, otherwise skip
Custom code is executed, records two character strings into static queue
Flag is set as that custom code not can be performed
}
After being packaged into jar packet by modified string class and being added to the java running environment of program to be analyzed,
The test function of program to be analyzed can be write, it may include: the set method for obtaining the label sets true for the label
True generates predetermined character string to execute the custom code in the string class when executing the method for the string class
As the pre-buried character string of test check function, pass through the side equals of string class described in the check function call
The method and static queue is recorded in character string to be compared, calls the get method of the static queue, reads the static state
The character string compared in queue, the character string compared include first that the pre-buried character string and the first parameter are constituted
Second group of character string that group character string, the pre-buried character string and the second parameter are constituted.Determining two character strings compared is
No includes pre-buried character string can include: determines from first group of character string that the static queue is read whether include pre-buried character
String；Whether and determining from second group of character string that the static queue is read includes pre-buried character string.
Illustrate the acquisition of the key parameter to program to be analyzed with a specific example below.
Fig. 2 shows the check methods of class Test1, from two key parameters of the input parameter of this method known to code
For " abc " and " 123 ", when inputting parameter and being the two character strings, code can just run to expectation path.Do not knowing Test1
Source code and obtain the two key parameters without using under conditions of other java analytical tools, it may include:
1, a static flag label is set in String class and increases its set method newly, the effect of the label is control
The coverage of custom code in String class processed, so that any code modified in String class is only needed in analysis program
It is had an impact when wanting, without influencing whether entire java program operation life cycle, it is ensured that program safety operation.
2, increase a static queue object and its get method in String class, while modifying String class
Equals method, so that static team is recorded in two character strings that can be to be compared when program runs to equals method
In column.Such as following pseudocode:
Equals method (comparand symbol string parameter)
Judge whether flag is executable custom code, if executable custom code, then continue to execute, otherwise jump
It crosses
Custom code is executed, records two character strings into static queue
It is set as label flag that custom code not can be performed
}
3, modified String class file is broken into jar packet and is added to the java running environment of program to be tested, if
Setting it and calling priority is that high priority and path and original java.lang.String are consistent to cover primitive class generation
Code.
4, the test method for writing trial function to be measured, the check method testing code main contents such as Test1 are as follows:
The side set of the flag defined before being obtained using String.Class.getMethod method in java reflection mechanism
Method calls the method to set true for flag, indicates to execute when the method currently gone in String class customized
Code.A special string (such as 112233xxx) is automatically generated as the pre-buried input of check function using procedure script to join
Number calls check method, and check method, which can call the equals method of String class and record, at this time compares operational character string.
After check method end of run, is obtained and called customized in String class using String.Class.getMethod method
The get method of static queue, by the static queue two groups of character strings take out, i.e., acquisition (112233xxx, abc) and
(112233xxx, 123) two groups of character strings are judged that wherein 112233xxx is self-defining character string, to know that its is corresponding
Abc and 123 two character string is the key parameter of check function, and then three test cases of the available function, point
Not are as follows: output NO, input parameter not equal to abc and differ when output YES, input parameter are equal to 123 when input parameter is equal to abc
It is not returned when 123, wherein third case may be considered invalid case.It is by analyzing the case that these are automatically generated
The no original demands that meet can derive whether program code is correct.If it was found that occurring in the analysis program process unexpected
It is abnormal, it may be possible to which that program bug needs subsequent analysis to verify.If calling resource recorded in analysis program process (such as
Sql sentence, external function etc.) it duplicates, then it is assumed that program, which has been likely to occur, to be computed repeatedly, and code quality has to be checked.
Dynamically analyzing of program method provided in an embodiment of the present invention, it is direct without syntactic analysis and semantic analysis step
The dynamic analysis of program are executed, it is intuitive effective, it is suitble to the dynamically analyzing of program of complication system.
In some embodiments of the invention, largely executable path can be generated, with the complexity of program, key parameter pair
Answer increasing for path node, the quantity growth in path is exponential, that is, so-called path explosion problem, in order to control road
The consumption of resource in diameter ergodic process is proposed using the code coverage in the current operational process of java coverage rate tool real-time judge
Degree terminates the analytic process so as to can choose when program runs certain number and coverage rate reaches a certain level,
Avoid the Infinite Cyclic of program.The interface that code coverage situation is obtained when the embodiment of the present invention is using its operation of Jacoco, is dividing
It analyses and is obtained in program process and using the code coverage information of analyzed program.
In a kind of specific embodiment, the physical interface example of calling is as shown in Figure 3.Code shown in Fig. 3, code are newly-built
The object of LoggerRuntime and Instrumenter, wherein Instrumenter object is used for coverage rate to be detected
Class name switchs to byte array and gives the array to IRuntime monitoring, and starting LoggerRuntime object is for monitoring.Figure
4 and code shown in fig. 5, it first defines the class that one inherits ClassLoader and is used to convert byte array before
At the class of coverage rate to be detected, such calls method to be analyzed, Zhi Houyou after generating an object by newInstance method
IRuntime collects implementation procedure information and by the object of information preservation a to ExecutionDataStore, then
Analyer is stored in the object of a CoverageBuilder to will analyze result after the object analysis again, finally by the object
In coverage information take out use.
The limitation of whole system resource, is often holding when in some embodiments of the invention, due to executing dynamic analysis
Row certain methods when can return to unexpected result, lead to program exception interrupt to be analyzed, so as to cause analyzed program code without
Method covers comprehensively, and the mode that method redefines is to solve the problems, such as a kind of this scheme.
In some embodiments of the invention, java program analysis method provided by the invention can include: described wait divide
Analysis program is run to when redefining method, is saved in the attribute information for redefining method by Spring aop scheduled
In class object, by redefining the parameter value of method described in the scheduled class object acquisition and returning to Value Types, call simultaneously
The proceed method of the scheduled class object continues to execute original method body.
In a kind of specific embodiment, analyzed program is run to when need to redefine method, and spring aop can should
The attribute information of method is stored in a ProceedingJoinPoint class object, can be with preparation method by the object
The information such as parameter value and return Value Types, while the object can be called
Proceed () method continues to execute original method body, such as the sql processing method of class is handled by interception database,
Current pending sql sentence is got, can choose continue to call that original method executes sql or to skip the step direct later
It returns customized as a result, flexibility with higher.
Method of the invention redefines in such a way that Spring is towards tangent plane programming aop, can provide more flexible
Solution, according to the return values of the information Dynamic Definition Methods such as the return Value Types of method or can need to obtain the party
The parameter value of method simultaneously carries out personalisation process.
In other embodiment of the invention, method, which redefines, can also use JMockit mode.Which uses
Simple, intuitive, can adapt to most of method or object redefines demand.
In other embodiment of the invention, method, which redefines, can also use bytecode programming mode, for example,
The modes such as CGLIB, Javaassist, ASM.This method has the characteristics that range is relatively wider and function is stronger.
In some embodiments of the invention, the return value object fill area attribute value to the method that redefines is needed, in order to avoid return
The contents of object returned is sky.Specific practice is to generate an object reality by java reflection mechanism after obtaining return Value Types
Example recycles reflection its attribute type list of acquisition and its set method (the class side BeanUtils to can be used under spring frame
Method obtains), then call set method to its attribute assignment.In some embodiments, java program provided by the invention analysis side
Method can include: attribute value filling is carried out to the return value for redefining method by recursive call mode, while recurrence is set
The threshold value of calling is to prevent infinite recursion from recycling.It is due to being filled in object using recursive call mode may include another
The object of class, thus it is designed as recursive call, so as to be filled to each layer of attribute, while a recurrence tune is set
Threshold values, in order to avoid there is the case where infinite recursion circulation.
The embodiment of the present invention can automatically generate test case, and can check to a certain extent potential in code
Loophole and code command and code coverage degree.
In some embodiments of the invention, when analyzed system program is not in holonomic system running environment, often
The exception that class is not present can be encountered.To solve the abnormal problem that class is not present, java program analysis method provided by the invention is also
Include: the error information for obtaining the program to be analyzed, extracts class name in the error information, use javaassist's
The makeclass method of classpool class handles the class name and obtains CtClass object, calls CtClass object
Runtime environment is added in the class created by toClass method.In the embodiment of the present invention, pass through javaassist root at runtime
According to class name dynamic creation class and the content of dynamic generation class, to solve the problems, such as that class was not present reports an error.
In some embodiments of the present invention, also provide a kind of directly effective using stack information reduction invalid road when operation
The mode of path search.The call stack information of StackTraceElement acquisition methods is provided in Java.lang packet, passes through tune
The heap of StackTraceElement [] can be obtained with function Thread.currentThread () .getStackTrace ()
Stack array saves the method information for executing and calling in array, including the class name of method, method name, filename and tune
Line number.The specific practice of Invalid path search is reduced using StackTraceElement are as follows: in the word of String category code
Symbol string rating unit increases custom code, and StackTrace stack information is obtained when each character string comparison and is recorded one
In array Stack1 [], when analyzed program is operating abnormally, exception object is obtained, and use its getStackTrace
The stack information that method obtains when being abnormal was recorded in Stack2 [], in comparative analysis Stack2 [] and Stack1 []
Each stack information, if include in discovery Stack2 [] and certain stack information Stack3 in Stack1 [] queue is analyzed
The method of program is identical and line number is close, then it is assumed that the corresponding key character string parameter of Stack3 [] is corresponding with Stack2 [] different
Normal generation is related, is played in the generation for avoid the exception it is thus regarded that modifying the string parameter values than modifying other parameters
It is worth more crucial effect, and then so that analyzed program is gone to more multipath under the premise of modification parameter value as few as possible,
Achieve the purpose that reduce route searching number.
Embodiment of the present invention also provides a kind of computer equipment.As shown in fig. 6, computer equipment 600 may include storage
Device 601 and processor 602, wherein memory 601 is stored with computer instruction, and processor 602 is configured to execute the computer
It instructs so that computer equipment 600 realizes methods described above.For method described above, details are not described herein.
Embodiment of the present invention also provides computer-readable storage medium, is stored thereon with computer instruction, the meter
The instruction of calculation machine realizes methods described above when being executed by processor.For method described above, details are not described herein.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can be by
The mode of software combination hardware platform is realized.Based on this understanding, technical solution of the present invention makes tribute to background technique
That offers can be embodied in the form of software products in whole or in part, which can store is situated between in storage
In matter, such as ROM/RAM, magnetic disk, CD, including some instructions use is so that a computer equipment (can be individual calculus
Machine, server, smart phone or network equipment etc.) it executes described in certain parts of each embodiment of the present invention or embodiment
Method.
Term and wording used in description of the invention are just to for example, be not intended to constitute restriction.Ability
Field technique personnel should be appreciated that under the premise of not departing from the basic principle of disclosed embodiment, to above embodiment
In each details can carry out various change.Therefore, the scope of the present invention is only determined by claim, in the claims, unless
It is otherwise noted, all terms should be understood by the broadest reasonable meaning.
Claims (12)
1. a kind of java dynamically analyzing of program method characterized by comprising
Modify the preordering method of character string string class in java development kit；
For the incoming parameter assignment of program to be analyzed, the assignment includes pre-buried character string；
Program to be analyzed described in Dynamic Execution determines whether two character strings compared include pre-buried character string,
It is pre-buried character string in response to a character string in described two character strings, by another in described two character strings
Key parameter values of the character string as the program to be analyzed.
2. the method according to claim 1, wherein the program to be analyzed includes the side java to be tested
Method, the preordering method include equals method.
3. according to the method described in claim 2, it is characterized in that, the method also includes:
Static label flag is set in the string class and increases the set method of the label, wherein the label
For controlling the coverage of custom code in the character string string class；
The get method for increasing static queue and the static queue in the string class, modifies the character string string
The equals method of class, when to run the equals method, the static queue is recorded in two character strings compared,
Modified string class is packaged into jar packet and is added to the java running environment of program to be analyzed, and by priority
It is set as high priority and path and original string class one shows the code for covering original character string string class.
4. according to the method described in claim 3, it is characterized in that, the method also includes:
The set method for obtaining the label sets true true for the label to hold when executing the method for the string class
Custom code in the row string class,
The pre-buried character string of the predetermined character string as test check function is generated,
By the equals method of string class described in the check function call and character string to be compared be recorded it is described
Static queue,
The get method for calling the static queue reads the character string compared in the static queue, the word compared
Symbol string includes first group of character string that the pre-buried character string and the first parameter are constituted, the pre-buried character string and the second parameter structure
At second group of character string.
5. according to the method described in claim 4, it is characterized in that, whether two character strings that the determination is compared include pre-
Burying character string includes:
Determine from first group of character string that the static queue is read whether include pre-buried character string；And
Determine from second group of character string that the static queue is read whether include pre-buried character string.
6. the method according to claim 1, wherein the method also includes:
When the program to be analyzed runs to and redefines method, the attribute for redefining method is believed by Spring aop
Breath is saved in scheduled class object, by the parameter value and return value that redefine method described in the scheduled class object acquisition
Type, while the proceed method of the scheduled class object being called to continue to execute original method body.
7. according to the method described in claim 6, it is characterized in that, the method also includes:
Attribute value filling is carried out to the return value for redefining method by recursive call mode, while recursive call is set
Threshold value is to prevent infinite recursion from recycling.
8. the method according to claim 1, wherein the method also includes:
The error information for obtaining the program to be analyzed, extracts class name in the error information, uses javaassist's
The makeclass method of classpool class handles the class name and obtains CtClass object, calls CtClass object
Runtime environment is added in the class created by toClass method.
9. according to the method described in claim 2, it is characterized in that, the method also includes:
The type of the input parameter of method to be analyzed is obtained, the parameter value list for meeting the type of the input parameter is generated, with
Just the method to be analyzed is passed to using the parameter value list as parameter.
10. according to the method described in claim 9, it is characterized in that, the input parameter includes entity class.
11. a kind of computer equipment, including memory and processor, wherein
The memory, for storing computer instruction；
The processor, for executing the computer instruction with computer instruction described in perform claim requirement 1 to 10.
12. a kind of computer readable storage medium, is stored thereon with computer instruction, the computer instruction is stored by execution
Method described in Shi Shixian claims 1 to 10.
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| CN110308922A (en) * | 2019-06-27 | 2019-10-08 | 百度在线网络技术（北京）有限公司 | Data transmission method, device, equipment and storage medium |
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