Experience with Safe Dynamic Reconfigurations in Component-Based Embedded Systems

Polakovic, Juraj; Mazare, Sebastien; Stefani, Jean-Bernard; David, Pierre-Charles

doi:10.1007/978-3-540-73551-9_17

Cited by 25 publications

(18 citation statements)

References 21 publications

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“…Jayaprakash et al [20] also uses FScript for similar purposes. Finally, [31] has shown how FScript can be used with the Think [17] implementation of Fractal (targeted at Operating System kernels) to take advantage of Think's reconfiguration features.…”

Section: Discussionmentioning

confidence: 99%

FPath and FScript: Language support for navigation and reliable reconfiguration of Fractal architectures

et al. 2008

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Component-based systems must support dynamic reconfigurations to adapt to their execution context, but not at the cost of reliability. Fractal provides intrinsic support for dynamic reconfiguration, but its definition in terms of low-level APIs makes it complex to write reconfigurations and to ensure their reliability. This article presents a language-based approach to solve these issues: direct and focused language support for architecture navigation and reconfiguration make it easier both to write the reconfigurations and to ensure their reliability. Concretely, this article presents two languages: (1) FPath, a domain-specific language that provides a concise yet powerful notation to navigate inside and query Fractal architectures, and (2) FScript, a scripting language that embeds FPath and supports the definition of complex reconfigurations. FScript ensures the reliability of these reconfigurations thanks to sophisticated run-time control, which provides transactional semantics (ACID properties) to the reconfigurations.

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Section: Discussionmentioning

confidence: 99%

FPath and FScript: Language support for navigation and reliable reconfiguration of Fractal architectures

et al. 2008

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“…It is worth noting that the most flexible solution consists in first generating the CP off-line and then in reconfiguring the PM at runtime by downloading the new CP and updating the bindings between interfaces. This requires runtime reconfiguration mechanisms also provided by Think [48,49]. However, to simplify performance evaluation experiments, we only rely in what follows on the static Think reconfiguration mechanisms.…”

Section: Support For Flexible Authorization Policiesmentioning

confidence: 99%

A component-based policy-neutral architecture for kernel-level access control

Lacoste

Jarboui

2008

Ann. Telecommun.

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Protection should fundamentally be flexible for devices roaming in Beyond 3G networks. In this federation of heterogeneous access networks, each sub-network comes with its own security requirements, policies, and protocols. Foundational element of device security, the embedded OS itself, should become adaptable to make it possible to tune its protection mechanisms to the current security context, notably to support multiple authorization policies. We show how flexibility can be applied to the kernel authorization architecture by adopting a component-based OS design, the component serving as single abstraction for reconfiguration and security. We present a policy-neutral access control architecture called CRACKER (Component-based Reconfigurable Access Control for KERnels) for componentbased operating systems. CRACKER supports a wide range of authorization policies, and permits policy reconfiguration, in the same or in different security models. Specified in the Fractal component model, and implemented in the Think OS, CRACKER illustrates how flexible kernel authorization can be realized while maintaining acceptable system performance.

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“…Components, independent and autonomous entities of arbitrairly granularity, can be considered as the basic unit of system evolution. Recent works [24] show how convenient it is to adopt component-based models when designing and executing reconfiguration operations. Based on the Fractal component model and the Think framework, a Domain Specific Language (DSL), FScript, allows reconfiguration designers to explore and manipulate a Fractal architecture.…”

Section: Dynamic Reconfigurations In Thinkmentioning

confidence: 99%

“…Components functional code being written in standard C language, it is particularly well suited to embedded systems development. Recent works [24] have proven how adequate is the use of components when dealing with the Dynamic Reconfiguration challenge, which implies run-time architecture modification operations that must be driven without affecting system functional engagements. They propose a programming interface and a reconfiguration script language, setting the foundations of evolution in component-based embedded systems.…”

Section: Introductionmentioning

confidence: 99%

Minimal yet effective reconfiguration infrastructures in component-based embedded systems

Navas

Babau

Lobry

2009

Proceedings of the 2009 ESEC/FSE Workshop on Software Integration and Evolution @ Runtime

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Dynamic reconfiguration features let embedded software systems evolve from original design and development time configurations in order to offer new functionalities or adapt themselves to new working contexts and requirements, among other goals. Component models provide an architectural pattern that eases development of software systems, as well as programming and execution of reconfiguration operations. However, binary-level reification of components and metadata needed for reconfiguration purposes may induce prohibitive performance loss. In this paper we define a reconfiguration infrastructure and propose strategies to minimize the impact of adding reconfiguration capabilities to a system in terms of memory occupation as a performance metric. We find that, by defining specific trade-offs between evolution capabilities and consumed memory space, it is possible to optimize the size of the reconfiguration infrastructure. Evaluation results illustrate this point and confirm the effectiveness of our approach.

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Experience with Safe Dynamic Reconfigurations in Component-Based Embedded Systems

Cited by 25 publications

References 21 publications

FPath and FScript: Language support for navigation and reliable reconfiguration of Fractal architectures

FPath and FScript: Language support for navigation and reliable reconfiguration of Fractal architectures

A component-based policy-neutral architecture for kernel-level access control

Minimal yet effective reconfiguration infrastructures in component-based embedded systems

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