Abstract softwareimplemented fault injection is an estab lished method to emulate hardware faults in computer systems. Measuring fault tolerance with the ftape fault injection tool this paper. Fault injection testing in software can be performed using either compiletime or runtime injections. Swifi softwareimplemented fault injection acronymfinder. Fault injection is a phrase covering a variety of techniques for inducing faults in systems to measure their response to those faults. Abstractthis paper addresses the issue of characterizing the respective impact of fault injection techniques.
Fault injection in software engineering geeksforgeeks. Comparison of physical and softwareimplemented fault injection. Software implemented fault injection for autosar based systems 10 the naming conventions for the generated functions are standardised by the autosar standard 20. Combining softwareimplemented and simulationbased fault. 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. Download table softwareimplemented fault injection tools from publication.
Software implemented fault injection tools inject faults into the software state of the application as it runs on a processor. Three physical techniques and one software implemented technique that have been used to assess the fault tolerance features of the mars fault tolerant. They should produce identicalthe sorted array elements if there is no software implemented fault injection technique applied. Web service based software implemented fault injection scialert. 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. Compiletime injections it is a fault injection technique where source code is modified to inject simulated faults into a system. In this paper we propose a distributed software implemented fault injection framework based on the mobile agent approach. Three physical techniques and one software implemented technique that have been used to assess the fault tolerance features of the mars fault tolerant distributed. Software based fault injection techniques can be classified into compiletime faults or runtime faults based on when the faults are injected. Finally, the comparator component compares the sorted arrays and indicates an output flag 1 if comparison matches or 0 if comparison mismatches. Softwareimplemented fault injection how is software. Such an approach facilitates the application of fault injection by overcoming several problems associated with fi techniques such as controllability, repeatability, etc. Fault error injection has emerged as a valuable means for evaluating the dependability of a system.
Implementation of fpga based fault injection tool fito. We propose a novel approach where fault injection capabilities are added to the computer firmware. Existing approaches typically extend the operating system. Experiences with canoebased fault injection for autosar. Pdf softwareimplemented fault injection at firmware level. A softwareimplemented fault injection methodology for. Evaluating software systems via runtime fault injection and reliability, availability and serviceability ras metrics and models rean gri. Tools, techniques, and contributions of this dissertation 3 1. Assessing dependability with software fault injection.
A modelimplemented fault injection tool request pdf. This is generally used on code that has communicative or cooperative functions so that there is enough interaction to make fault injection useful. Test case generation for production systems with model. Comparison of physical and softwareimplemented fault. The results reveal that fault injection on software models is e. Software implementation an overview sciencedirect topics. Challenges and opportunities with fault injection in. An open and versatile faultinjection framework for. 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. The software based fault injection consists of two categories. The fault injector uses software based strategies to emulate the effects of radiationinduced transients occurring in the. Softwareimplemented fault injection how is softwareimplemented fault injection abbreviated.
Various fault injection implementation strategies with different characteristics exist. This paper presents an application of the focused fault injection method that has been developed for testing software implemented fault tolerance mechanisms of. Software fault injection is a method to anticipate worstcase scenarios caused by faulty software through the deliberate injection of software faults. 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 for software certification. Fail supplies the developer with reusable and composable fi campaigns, advanced pre and postprocessing analyses to. With the rise of software complexity, software related accidents represent a significant threat for computerbased systems. Software based fault injection methods are divided into software implemented fault. Efficient faultinjectionbased assessment of software. 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. Compiletime injection is a technique in which testers change the source code to simulate faults in the software system. Existing approaches typically extend the operating system by special drivers or change the application under test. Softwareimplemented fault injection in operating system. Hardware fault injection hardware implemented fault injection uses additional har dwar e to intr oduce faults into the tar get sys tem s hardware. Software implemented fault injection for autosar based systems. In order to improve the evaluation method, this paper make a study about bringing in softwareimplemented fault injection technology, which inject fault inside the software artificially, the reliability and fault tolerance of software can be evaluated while the inside errors are activated. Swifi stands for softwareimplemented fault injection.
A study of software implemented fault tolerance in. Modelimplemented fault injection for robustness assessment. 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. 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. Softwareimplemented fault injection is an established method to emulate hardware faults in computer systems. Within the numerous fault injection approaches that have been proposed, there are two classifications of fault injection methods 2. Fault injection is a technique for enhancing the testing quality by involving the intentional faults in the software. Softwareimplemented fault injection listed as swifi. Software fault injection is used to inject faults into the operation of software and examine the effects. The concept of using software implemented fault injection swifi for software component evaluation seems very appealing. Softwareimplemented fault injection tools download table. Nonintrusive softwareimplemented fault injection in embedded. Web service based software implemented fault injection. A trend favoring the injection of errors through the software layer for simulating physical faults.
Software implemented fault injection for autosar based. Depending on the faults and their locations, har dwar e implemented fault injection meth ods fall into two categories. The springer international series in engineering and computer science office of naval research advanced book series, vol 283. A softwareimplemented fault injection methodology for design and. Softwareimplemented fault injection at firmware level. Softwareimplemented fault injection of transient hardware.
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. 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. Moreover, recent studies have shown that swifi was also able to. Study and development of a software implemented fault. Focused fault injection testing of software implemented fault. It basically consists of injecting faults into a system using a specific piece of software. Therefore, an important aspect of any software component is how resilient it is to faults.
Software fabrication involves programmatic design, source code editing or programming, and testing of each software unit. Readers can refer to 1, 2, 3 for a survey on fault injection methods and techniques. Fault injection is often in stress testing and it is considered as an important part of developing robust software. Software implementation begins with the effort of software fabrication. Obtaining the avfs for architectural register files requires numerous fault injection experiments on a. Improving fault injection in automotive model based. Comparison of physical and softwareimplemented fault injection techniques. In particular, it can be used in both electronic hardware systems and software systems to measure the fault tolerance of the system. Questions like what type of faults that arise in real systems and how to emulate them in software must be answered.
As mentioned before, fault injection process can be software based or hardwarebased. How is softwareimplemented fault injection abbreviated. A softwareimplemented fault injection tool able to inject faults guaranteeing the nonintrusiveness and repeatability of the fault injection campaign is proposed. Software implemented fault injection methods can be adapted to inject faults on various. Presents our experience in developing a methodology and tool at the jet propulsion laboratory jpl for softwareimplemented fault injection swifi into a. 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. This paper addresses the issue of characterizing the respective impact of fault injection techniques. In software implemented fault injection swifi, software is used to mimic hardware or software faults in a prototype. Swifi techniques for software fault injection can be categorized. For safety analyses during modelbased development, fault injection mechanisms can be added directly into models of hardware, models of software or models of systems. Softwareimplemented fault injection swifi techniques enable fault injection to be performed by software. Investigating silent failures using fault injection experiments2.
1435 1562 948 549 1031 1419 808 1431 815 601 474 1 1236 72 47 1141 589 481 594 949 759 31 811 923 624 1093 499 1209 382 377 661 156 603 424 252 1196 844 61 433 1467 811