A softwareimplemented fault injection methodology for design and validation of. We propose a novel approach where fault injection capabilities are added to the computer. Software based fault injection techniques can be classified into compiletime faults or runtime faults based on when the faults are injected. Web service based software implemented fault injection. Software testing is an investigation conducted to provide stakeholders with information about the quality of the software product or service under test. Web service based software implemented fault injection scialert. 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. That alone is nothing new many software development organizations invest much more in testing than in process improvement. Citeseerx a kernelbased communication fault injector. A modelimplemented fault injection tool springerlink. Fault injection in physical systems is important because it tests the actual implementation of fault handling mechanisms. Using fault injection to increase software test coverage. Hardware software open storage data cor ruption bridging such as r egister, memory, and disk.
Fault injection has long been used as a technique for accelerated testing. In this paper we propose a distributed software implemented fault injection framework based on the mobile agent approach. 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. Fault injection testing in software can be performed using either compiletime or runtime injections. In software testing, fault injection is a technique for improving the coverage of a test by introducing faults to. We propose a novel approach where fault injection capabilities are added to the computer firmware. The reaction of automated production systems apss and their programmable logic controller plc software to these faults is tested. Citeseerx software implemented fault injection used for. Very little research has been done regarding testing web services or middleware.
Hardware fault injection could be used to test software software based techniques work software doesnt know where fault came from can be used to test hardware tends not to trigger hardware fault detection jean arlat, et al. Fault injection or requirements based testing in iso 26262. Fault injection test in iso 26262 do you really need it. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Software implemented fault injection for autosar based systems. Existing approaches typically extend the operating system by special drivers or change the application under test. In this paper, we present comfirm, a communication fault injection tool we developed which minimizes the probe effect on the tested protocols. Focused fault injection testing of software implemented. Implement fault injection resistant software make critical assets inaccessible to software e. Software testing can also provide an objective, independent view of the software to allow the business to appreciate and understand the risks of software implementation. 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. Using fault insertion units fius for electronic testing. It is the sad truth that no matter how good a programmer you are all software systems will contain faults and be exposed to faults from the environment. Comparison of physical and softwareimplemented fault.
This technique is based on simulations or experiments result, thus it may be more valid or closer to reality compared to statistical methods. Fault injection attacks on secure boot niek timmers and albert spruyt duration. Therefore, an important aspect of any software component is how resilient it is to faults. We present a welldefined development methodology incorporating sfi fault injection driven development fiddwhich begins by systematically.
Engineers use fault injection to test fault tolerant systems or components. Software implemented fault injection for autosar based systems iii abstract 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. Fault injection is a testing technique which aids in understanding how virtualreal system behaves when stressed in unusual ways. Fault models that are implemented in our project are clearly. The method exploits the object oriented approach of software implementation to support the injection of. However, techniques for injecting faults in physical systems, such as pinlevel fault injection 23 or software implemented fault injection swifi 456 provides limited controllability and observability. Hardware fault insertion also known as fault injection is a critical consideration in test systems that are responsible for the reliability of embedded control units. Fault injection test includes injection of arbitrary faults in order to test safety mechanisms e.
Abstract fault injection is mainly used to test and evaluate the fault tolerance based designs. Software fault injection sfi is an acknowledged method for assessing the. Software fault injection sfi is an acknowledged method for assessing the dependability of software systems. The springer international series in engineering and computer science office of naval research advanced book series, vol 283. A lightweight fault injection approach to test automated. This approach is denoted by the authors as model implemented fault injection. Software implemented fault injection methods can be adapted to inject faults on various. Experiences with canoebased fault injection for autosar. We use fault injection to improve testing coverage by adding some trouble. The fault attack testing is a type of experience based testing technique.
This paper presents the modifi modelimplemented fault injection tool. In software engineering the fault injection testing technique is used to gather information about the reliability of. Fault injection implementation methods by fault model. In software testing, fault injection is a technique for improving.
See also 17, 181 for surveys on these fault injection techniques. Methods for testing fault tolerant systems fault injection. Cpatrol cpatrolisa codeinsertiontoolthatcanassist developers in the placement of software probes that are used in testing. Fault injection techniques and tools electrical and computer. Comparison of physical and softwareimplemented fault injection. Compiletime injection is a technique in which testers change the source code to simulate faults in the software system. Softwareimplemented fault injection of transient hardware. It is the deliberate introduction of faults into a system, and the subsequent examination of the system for the errors and failures that result. Software implemented fault injection is a powerful strategy to test fault tolerant protocols in distributed environments. Canoe contains the test feature set for easy and automated exe. Comparison of physical and software implemented fault injection techniques, ieee 2003. This paper presents an application of the focused fault injection method that has been developed for testing software implemented fault tolerance mechanisms of distributed systems. Comparison of physical and softwareimplemented fault injection techniques jean arlat, member, ieee, yves crouzet, johan karlsson,member, ieee. Fault injection is a software testing technique by introducing faults into the code for improving the coverage and usually used with stress testing for robustness of the developed software.
Study and development of a software implemented fault. A lightweight software implemented fault injection swifi testing approach is introduced, focusing on technical process faults and system faults. Focused fault injection testing of software implemented fault. To demonstrate the proposed fault injection method, we extendedthecpatrolassertioninsertionsystem18 tosupport fault injection and built a visual x window system interface. Fault injection for formal testing of fault tolerance. But, if the system also learns from the problems, then it becomes antifragile. Software implemented fault injection is an established method to emulate hardware faults in computer systems. They can also be used to test the fault tolerance capabilities of the system under test or any proposed technique for providing fault tolerance in circuits or software. Test case generation for production systems with model. This thesis investigates the issues of testing software implemented fault tolerance mechanisms of distributed systems through fault injection. Swifi can be either used at compiletime or at runtime. Software implemented fault injection for autosar based. Fault injection is a testing technique used in computer systems to test both hardware and software.
The concept of using software implemented fault injection swifi. The iso 262624 system defines the fault injection test as follows. The method requires that the target software system be structured as. Likewise, look at simulated fault injection and software implemented fault injection. A description of a proofofconcept software implemented fault injection framework an example application of the framework a qualitative discussion of the what worked well, as well as.
Abstract software implemented fault injection is an established method to emulate hardware faults in computer systems. Compiletime injections it is a fault injection technique where source code is modified to. This tutorial describes the uses for fault insertion as well as how to incorporate fault insertion units fius into hardwareintheloop hil test systems built with pxi hardware. Fault injection in software engineering geeksforgeeks. Improving fault injection in automotive model based. Iso 26262, part 8 section 11 recommends that software tools are independently qualified.
This paper presents the modifi model implemented fault injection tool. For safety analyses during modelbased development, fault injection mechanisms can be added directly into models of hardware, models of software or models of systems. A softwareimplemented fault injection methodology for design and. An open and versatile faultinjection framework for. There is a great need for automated software implemented fault injection swifi tools to assist programmers and system designers with.
Software implemented fault injection swifi is a well proven technique for. The thesis analyses the autosar standard in order to identify mechanisms, which can be used at runtime in order to inject faults. Is fault injection testing a subset of requirements based testing, and does it deliver the desirable outcome. Traditional hardware fault injection cpu adaptation module fault injection elements hardware implemented fault injection e. Include fault injection attacks in your threat model design and implement fault injection resistant hardware start from an early design test, test and test again. The experience based techniques are based on the experiences of software testers in development and analysis.
Implementation of fpga based fault injection tool fito. Is requirementbased testing a better and safer way to ensure high quality software. There are various types of experience based techniques. Softwareimplemented fault injection at firmware level. Engineers use fault injection to test faulttolerant systems or. Software implemented fault injection for safetycritical. Various fault injection implementation strategies with different characteristics exist. 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. In the testing of operating systems for example, fault injection is often performed by a driver kernelmode software that intercepts system calls calls into the kernel and randomly returning a.
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