TASA: Toolchain-Agnostic Static Software randomisation for critical real-time systems

Measurement-Based Probabilistic Timing Analysis (MBPTA) derives WCET estimates for tasks running on processors comprising high-performance features such as caches. MBPTA's correct application requires the system to exhibit certain timing properties, which can be achieved by injecting randomisat...

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Veröffentlicht in:Digest of technical papers - IEEE/ACM International Conference on Computer-Aided Design S. 1 - 8
Hauptverfasser: Kosmidis, Leonidas, Vargas, Roberto, Morales, David, Quinones, Eduardo, Abella, Jaume, Cazorla, Francisco J.
Format: Tagungsbericht
Sprache:Englisch
Veröffentlicht: ACM 01.11.2016
Schlagworte:
Automotive engineering
Hardware
Probabilistic logic
Program processors
Timing
ISSN:1558-2434
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Zusammenfassung:Measurement-Based Probabilistic Timing Analysis (MBPTA) derives WCET estimates for tasks running on processors comprising high-performance features such as caches. MBPTA's correct application requires the system to exhibit certain timing properties, which can be achieved by injecting randomisation in the timing behaviour of the task under analysis. However, existing software-randomisation techniques require costly modifications in the industrial production toolchain (compiler, linker, runtime or hardware) in terms of development and certification. In this paper we present TASA, a new software randomisation tool that relies on source-code transformations of the application (i) requiring no changes in existing toolchains, which heavily reduces tool qualification and implementation costs; and (ii) achieving competitive WCET estimates that we assess on a gcc- and a llvm-based compilation toolchain on a real board.
ISSN:1558-2434
DOI:10.1145/2966986.2967078