Study and development of a software implemented fault. Download table softwareimplemented fault injection tools from publication. Various fault injection implementation strategies with different characteristics exist. Modelimplemented fault injection for robustness assessment. We propose a novel approach where fault injection capabilities are added to the computer firmware.
A softwareimplemented fault injection methodology for design and. Abstractthis paper addresses the issue of characterizing the respective impact of fault injection techniques. Software fault injection for software certification. Depending on the faults and their locations, har dwar e implemented fault injection meth ods fall into two categories. This paper presents an application of the focused fault injection method that has been developed for testing software implemented fault tolerance mechanisms of. Fault injection testing in software can be performed using either compiletime or runtime injections. Software based fault injection methods are divided into software implemented fault. Existing approaches typically extend the operating system.
Software implementation begins with the effort of software fabrication. Software implementation an overview sciencedirect topics. Implementation of fpga based fault injection tool fito. Software implemented fault injection for autosar based systems november 5, 20 embedded staff described in this presentation is the design and implementation of a software implemented fault injection tool, which can be used to perform robustness testing on application software components in embedded systems based on the autosar standard architecture. Comparison of physical and softwareimplemented fault injection. Since such fault injection tools are used to conduct experiments on applications executing natively on a processor, the experiments can be carried out at almost the same speed as the application execution and can be run on the same hardware as used by the software application in the. Swifi stands for softwareimplemented fault injection. With the rise of software complexity, software related accidents represent a significant threat for computerbased systems. Depending on the type of call, the name will consist of the type of call being made, port name, data type and the components name. A softwareimplemented fault injection methodology for.
Web service based software implemented fault injection. There are however many questions that needs to be resolved before any real use of such a technique can be gained. Software implemented fault injection tools inject faults into the software state of the application as it runs on a processor. Readers can refer to 1, 2, 3 for a survey on fault injection methods and techniques. Three physical techniques and one software implemented technique that have been used to assess the fault tolerance features of the mars fault tolerant. Software implemented fault injection for autosar based systems 10 the naming conventions for the generated functions are standardised by the autosar standard 20. The combination of these techniques allows the incorporation of new capabilities by the use of mechanisms to trigger and synchronize the injection of a. Software fault injection is a method to anticipate worstcase scenarios caused by faulty software through the deliberate injection of software faults.
Compiletime injections it is a fault injection technique where source code is modified to inject simulated faults into a system. The tool called modifi or modelimplemented fault injection tool can be sued to inject single or multiple point faults on behavioural models, which can be used to study the effectiveness. The logic for the hardware fault injection circuitry is implemented using field programmable gate arrays, and the software is an extension of ferrari, the software based fault injection system. In this paper we propose a distributed software implemented fault injection framework based on the mobile agent approach. Measuring fault tolerance with the ftape fault injection tool this paper. Questions like what type of faults that arise in real systems and how to emulate them in software must be answered. Traditional hardware fault injection cpu adaptation module fault injection elements hardware implemented fault injection e. In particular, softwarebased techniques, which can be described as softwareimplemented and simulationbased techniques, have become very popular because of the relative simplicity of injecting faults. An analysis of the results has been performed on a large set of mutexes, in order to evaluate their criticality, in particular during inputoutput operations. Within the numerous fault injection approaches that have been proposed, there are two classifications of fault injection methods 2. These changes can be implemented by making modifications or mutations to the existing code, such as altering a line of code to represent a different value. Assessing dependability with software fault injection. The concept of using software implemented fault injection swifi for.
This masters thesis describes the design and implementation of a software implemented fault injection tool, which can be used to perform robustness testing on application software components in embedded systems based on the autosar standard architecture. It basically consists of injecting faults into a system using a specific piece of software. Abstract softwareimplemented fault injection is an estab lished method to emulate hardware faults in computer systems. This is generally used on code that has communicative or cooperative functions so that there is enough interaction to make fault injection useful. Softwareimplemented fault injection how is software. This paper addresses the issue of characterizing the respective impact of fault injection techniques. Investigating silent failures using fault injection experiments2.
Softwareimplemented fault injection of transient hardware. Swifi is defined as softwareimplemented fault injection rarely. Fault injection in software engineering geeksforgeeks. Evaluating software systems via runtime fault injection and reliability, availability and serviceability ras metrics and models rean gri. The fault injector uses software based strategies to emulate the effects of radiationinduced transients occurring in the. They should produce identicalthe sorted array elements if there is no software implemented fault injection technique applied. Experiences with canoebased fault injection for autosar. Swifi techniques for software fault injection can be categorized. The results reveal that fault injection on software models is e. Software implemented system fault injection the implementation and deployment of swifi consists of three main components. For safety analyses during modelbased development, fault injection mechanisms can be added directly into models of hardware, models of software or models of systems. Three physical techniques and one softwareimplemented technique that have been used to assess the fault tolerance features of the mars fault tolerant distributed realtime system are compared and analyzed.
Software implemented fault injection methods can be adapted to inject faults on various. In software implemented fault injection swifi, software is used to mimic hardware or software faults in a prototype. Software fabrication involves programmatic design, source code editing or programming, and testing of each software unit. Fail supplies the developer with reusable and composable fi campaigns, advanced pre and postprocessing analyses to. Software implemented fault injection for autosar based systems. A trend favoring the injection of errors through the software layer for simulating physical faults. Fault error injection has emerged as a valuable means for evaluating the dependability of a system. The springer international series in engineering and computer science office of naval research advanced book series, vol 283. Softwareimplemented fault injection is an established method to emulate hardware faults in computer systems. In particular, it can be used in both electronic hardware systems and software systems to measure the fault tolerance of the system. Well known techniques are hardwareimplemented fault injection hifi and softwareimplemented fault injection swifi. Presents our experience in developing a methodology and tool at the jet propulsion laboratory jpl for softwareimplemented fault injection swifi into a parallelprocessing supercomputer which is being designed for use in nextgeneration space exploration missions.
Improving fault injection in automotive model based. An open and versatile faultinjection framework for. A modelimplemented fault injection tool request pdf. Challenges and opportunities with fault injection in. Softwareimplemented fault injection tools download table. Test case generation for production systems with model. Web service based software implemented fault injection scialert. Fault injection is often in stress testing and it is considered as an important part of developing robust software. Focused fault injection testing of software implemented fault. Three physical techniques and one software implemented technique that have been used to assess the fault tolerance features of the mars fault tolerant distributed. As mentioned before, fault injection process can be software based or hardwarebased. Therefore, an important aspect of any software component is how resilient it is to faults.
This tool is a software implemented fault injection platform that empowers users with the ability of performing advanced and effective system validation, evaluation and testing of mission and business critical software systems through the use of a fault injection technique software implemented fault injection swifi. Existing approaches typically extend the operating system by special drivers or change the application under test. A study of software implemented fault tolerance in. Such an approach facilitates the application of fault injection by overcoming several problems associated with fi techniques such as controllability, repeatability, etc.
Tools, techniques, and contributions of this dissertation 3 1. Softwareimplemented fault injection listed as swifi. The concept of using software implemented fault injection swifi for software component evaluation seems very appealing. Compiletime injection is a technique in which testers change the source code to simulate faults in the software system.
Swifi softwareimplemented fault injection acronymfinder. Citeseerx software implemented fault injection used for. Software implemented fault injection for autosar based. Fault injection is a technique for enhancing the testing quality by involving the intentional faults in the software. Softwareimplemented fault injection how is softwareimplemented fault injection abbreviated. Moreover, recent studies have shown that swifi was also able to. Combining softwareimplemented and simulationbased fault. A softwareimplemented fault injection tool able to inject faults guaranteeing the nonintrusiveness and repeatability of the fault injection campaign is proposed. Obtaining the avfs for architectural register files requires numerous fault injection experiments on a. Fault injection is a phrase covering a variety of techniques for inducing faults in systems to measure their response to those faults. Hardware fault injection hardware implemented fault injection uses additional har dwar e to intr oduce faults into the tar get sys tem s hardware. Softwareimplemented fault injection in operating system. Finally, the comparator component compares the sorted arrays and indicates an output flag 1 if comparison matches or 0 if comparison mismatches.
Pdf softwareimplemented fault injection at firmware level. Comparison of physical and softwareimplemented fault. Runtime injections it makes use of software trigger to inject a fault into a software system during run time. How is softwareimplemented fault injection abbreviated. Softwareimplemented fault injection swifi techniques enable fault injection to be performed by software. Comparison of physical and softwareimplemented fault injection techniques. Efficient faultinjectionbased assessment of software. Software fault injection is used to inject faults into the operation of software and examine the effects.
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