Dynamic slicing of objectoriented programs springerlink. Dynamic testing involves working with the software, giving input values and checking if the output is as expected. Program slicing is a process of finding all the statements in a. Feb 14, 2014 introduction dynamic slicing is a novel method for detecting interaction between two groups of observations. History how to extract a slice program slicing techniques applications program.
This way, agile teams get better effort estimate and get smaller but concrete output in single. Chapter 10 data flow testing slice testing ppt download. Dynamic analysis tools are dynamic because they require the code to be in a running state. In addition, all real structures potentially have an infinite number of displacements. Software testing testing tools for embedded software. For dynamic program analysis to be effective, the target program must be executed with sufficient test inputs to cover almost all possible outputs.
The sensitivity of dynamic slicing to particular program inputs makes it more useful in program debugging and testing than static slicing. Dynamic testing is a software testing type, which checks the dynamic behaviour of the code. Then in the branch function, we use the method of minimization, and guide the adjustment of program input. In the process of generating test data automatically, if the dynamic program slicing technique is used, the efficiency of generating test data can be improved. Dynamic program slicing with pinplay intel software.
Program slicing and testing in software engineering. Dynamic powerpoint presentations digital signage software. Slicing techniques have been seeing a rapid development since the original definition by mark weiser. It identifies vulnerabilities that might have been false negatives in the static code analysis. These are software testing methods which any company must pickprecisely. Program slicing and approaches to dynamic slicingfor testing. A survey and comparison of dynamic slicing methods has been presented by korel and rilling 61. The goal of reverse engineering is not to alter the system in any way. Program slicing based techniques ppt download slideplayer. Program slicing for refactoring, static slicer using dynamic analyser 1. A craftsmans approach, 3rd edition data flow testing.
They are analysis rather than testing tools because they analyze what is happening behind the scenes that is in the code while the software is running whether being executed with test cases or. It summarized static slicing and dynamic slicing also, it summarized white and black box. These are vital testing techniques accessible for testers anddevelopers in software development lifecycle. However, the dynamic dependence graph constructed to compute dynamic slices. Dynamic slicing for hypothesis testing bo jiang, chao ye and jun s. Driving embedded software quality with automation of unit testing, code coverage, integration testing and static analysis to optimise safety and business critical embedded software. Dynamic slicing is performed on an execution trace by detecting dynamic control and data dependencies. In this paper we address the dynamic counterpart of the static slicing problemfinding all statements that really affected the value of a variable occurrence for the given program inputs.
Consequently, it is important to compactly represent the execution trace and perform program analysis e. The point of stress testing is to guarantee that under a steady load for a long span, the servers dont crash, but reacting gradually. My company offers the dms software reengineering toolkit, which contains general machinery for program control and data flow analysis including building custom static code slicers. Is there a real difference between dynamic analysis and testing. Introduction refactoring is the process of changing a software system in such a way that it does not alter the external behavior of the code yet improves its internal structure. Stress testing or soak testing resembles stack testing yet we continue the heap on the server for a long stretch, say 60 minutes. Dynamic program slicing is a dynamic program analysis technique that given a slicing criterion line number, variable, finds all statements in the program affecting if backward sliced or affected by if forward sliced the slicing criterion for a specific execution. But these algorithms ma y compute o v erlarge slices.
Application of dynamic program slicing technique in test. Presentationpoint is the leading provider of real time and dynamic powerpoint presentations and digital signage software solutions. It is white box testing in that we examine internal rather than external behavior. A study of effectiveness of dynamic slicing in locating real.
Of program slicing debugging testing software maintenance. Other applications of slicing include software maintenance, optimization, program analysis, and information flow control. However, the slices constructed by slicing can be very large. Program slice has many applications such as program debugging, testing, maintenance, and complexity measurement. Software testing slice based testing definition and examples. Bogdan korel and janusz laski introduced dynamic slicing, which works on a specific execution of the. What is dynamic analysis tools in software testing. Validate the quality of a software testing using the minimum costand efforts. Therefore, the most critical phase of a structural analysis is to create a computer model, with a finite number of massless members and a finite number of node joint displacements, that will. It is the time to consider this big user story as epic and start slicing it in smaller user stories. The notion of a dynamic dependence graph and its use in computing dynamic slices is discussed. A blackbox test is a dynamic analysis tool for testing software modules. Program slicing is now among the most useful techniques that can.
Slicing methods using static and dynamic analysis information. The core and key of software testing is test data generation. We have tested and approved slicing profiles available below for each 3d printing filament and print quality option. Dynamic testing or dynamic analysis is a term used in software engineering to describe the testing of the dynamic behavior of code. Javaslicer is an opensource dynamic slicing tool developed by clemens hammacher at saarland university. Yet the code under test must be executed, and that is done by running the same black box tests used for dynamic testing. Particularly dynamic program slicing is used in interactive applications such as debugging and testing of programs. In this paper we study the effectiveness of fault location using dynamic slicing for a set of real bugs reported in some widely used software. A dynamic slice is constructed with respect to the traditional static slicing criterion together with dynamic information the input sequence supplied to the program, during some specific execution. Given a program p, and a program graph gp in which statements and statement fragments are numbered, and a set v of variables in p, the slice on the variable set v at statement fragment n, written sv,n, is the set node numbers of all statement fragments in p prior to n that contribute to the values of variables in v at statement fragment n. Generate high quality test cases, perform effective tests.
May 16, 20 in addition, all real structures potentially have an infinite number of displacements. Dynamic slicing allows to adapt a slice like in the clouddc. Demonstrate a given software product matching its requirementspecifications. Slicing introduction background overall approach methodology experiments results conclusion. Dynamic slicing algorithms have been considered to aid in debugging for many years. There seem to be a variety of dynamic program slicing tools for java built by universities.
Application of dynamic program slicing technique in test data. Apr 07, 2015 dynamic program slicing is a dynamic program analysis technique that given a slicing criterion line number, variable, finds all statements in the program affecting if backward sliced or affected by if forward sliced the slicing criterion for a specific execution. Often testing is regarded as a dynamic analysis of a software. Cura is a free software program that both prepares your files for printing by converting your model into gcode, and also allows you to control the operation of your lulzbot 3d printer. A free powerpoint ppt presentation displayed as a flash slide show on id. Restructuring programs by tucking statements into functions. However, the size of an execution trace may be huge. They are analysis rather than testing tools because they analyze what is happening behind the scenes that is in the code while the software is running whether being executed with test cases or being used in operation. Objectives uncover as many as errors or bugs as possible in a givenproduct.
Dynamic testing increases the cost of projectproduct because it does not start early in the software lifecycle and hence any issues fixed in later stages can result in an increase of. A static slice consists of all statements in programp that may effect the value of variablev at some pointp, and a dynamic slice consists only of statements that influence the value of variable occurrence for specific program inputs. That is, dynamic analysis refers to the examination of the physical response from the system to variables that are not constant and change with time. Javaslicer requires the following software on your machine.
Jun 23, 2016 static testing vs dynamic testing static testing and dynamic testing are two important techniques relatedto software testing. Besides debugging 58, 50, 4, dynamic slicing has been used for several applications, including software testing 48, software maintenance 54, 60, and program comprehension 59. Which of the following is a dynamic analysis tool for the. But, while covering all related work and scenarios, same user story expands so much that it can not fit either in a week or a sprint timeframe. Refactoring improves the design of software and it makes software easier to understand.
First, in the program, we calculate the dynamic slice of the interest points variable, and get the current. Slicing has applications in testing and debugging, reengineering, program comprehension and software measurement. Slicing anoverview ofprogramingslicing static anddynamicslicingcomparison. Information and software technology special issue on program slicing, 401112, pages 647659, december 1998. Speci cally, here we develop four types of dynamic slicing schemes to deal with nonparametric ksample test. Ppt program slicing powerpoint presentation free to view id. Jul 29, 2006 dynamic slicing algorithms have been considered to aid in debugging for many years. During the testing of software modules a blackbox test works first in a cohesive manner as one single unitentity, consisting of numerous modules and second, with the user data that flows across software modules. Several approaches for computing dynamic slices are examined. Dynamic analysis refers to the examination of the physical response from the system to variables that are not constant and change with time. It allows for analysis of applications in which you do not have access to the actual code. Reverse engineering reverse engineering supports understanding of a system through identification of the components or artifacts of the system, discovering relationships between them and generating abstractions of that information.
Static testing vs dynamic testing static testing and dynamic testing are two important techniques relatedto software testing. The process of slicing deletes those parts of the program which can be determined to have no effect upon the semantics of interest. Dynamic testing is time consuming because it executes the application software or code which requires huge amount of resources. Information and software technology special issue on program slicing, 40,1112, pages 677690, november 1998. Dynamic analysis is analytical testing in that the intention is to examine the test item rather than exercise it. Dynamic slicing of computer programs sciencedirect. In principle, test cases are designed to cover each partition at least once. Therefore the dynamic slicing techniques need to be efcient. Dynamic code analysis is a testing procedure that is part of the software debugging process and used to evaluate a program during realtime execution. Automated tools provide flexibility on what to scan for. Jan 22, 2014 dynamic analysis in software testing 1. In computer programming, program slicing is the computation of the set of program statements. It computes dynamic backward slices of java programs by attaching to them as a java agent. Static compile time and dynamic execution time versions.
Slicing or program slicing is a technique used in software testing which takes a slice or. Slicing methods using static and dynamic analysis information yoshiyuki ashida y, fumiaki ohata and katsuro inoue y graduate school of engineering science, osaka university machikaneyamacho, toyonaka, osaka 5608531, japan. However, as far as we know, no detailed studies on evaluating the benefits of using dynamic slicing for locating real faults present in programs have been carried out. First, in the program, we calculate the dynamic slice of the interest point s variable, and get the current value of the interest point s variable. Hecker vfcs 2017 lisbon, oct 2324 2017 from slicing to dynamic resource control 6.
From wikipedias definition of dynamic program analysis. Static slicing can be used to assist debugging by simplying the program. Soot is a java optimization framework that provides intermedi ate representations of java code designed for static analysis 12. It identifies vulnerabilities in a runtime environment. Dynamic program slicing is not only used in software debugging but also in software maintenance and software testing 2, 7, 10, 21, 22. Improving program slicing with dynamic pointsto data. Dynamic program analysis is the analysis of computer software that is performed with executing programs built from that software on a real or virtual processor analysis performed without executing programs is known as static code analysis. Program slicing is a technique for simplifying programs by focusing on selected aspects of semantics.
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