Design und Implementierung eines Zephyr-RTOS-Modells für ARA zur statischen Whole-System-Analyse

• Typ der Arbeit: Bachelorarbeit
• Status der Arbeit: abgeschlossen
• Projekte: AHA
• Betreuer: Gerion Entrup, Daniel Lohmann
• Bearbeiter: Kenny Albes
• Ende der Arbeit: 28. Feb 2021

ARA is a program to statically analyze a real-time system to extract all operating system instances (like threads) together with their interactions (what thread interacts with this queue?). It is built upon the LLVM compiler infrastructure and makes heavy use of it's API. Currently, it is able to analyze applications written for FreeRTOS (providing dynamic instances only) and partially the OSEK API (providing static instances only).

Zephyr is a full-featured RTOS guided by the Linux Foundation. It supports static and dynamic instances and provides a high amount of configuration options. The goal of this thesis is to bring support for Zephyr analysis to ARA. Therefore, the system calls of Zephyr must be recognized and interpreted as part of ARA.

The following tasks are part of the thesis:

• Extend the existing RTOS model to support Zephyr.
• Write a basic Zephyr system call interpreter in Python.
• Evaluate the implementation with appropriate Zephyr based real-time systems.

Topics covered by this thesis:
real-time systems, static analysis, LLVM, C++, C, Python

Further Reading

OSPERT Workshop B
ARA: Automatic Instance-Level Analysis in Real-Time Systems

Gerion Entrup, Benedikt Steinmeier, Christian DietrichProceedings of the 15th Annual Workshop on Operating Systems Platforms for Embedded Real-Time Applications (OSPERT '19)2019.
PDF [BibTex]

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BibTex Entry

@inproceedings{entrup:19:ospert,
author = {Gerion Entrup and Benedikt Steinmeier and Christian Dietrich},
booktitle = {Proceedings of the 15th Annual Workshop on Operating Systems Platforms for Embedded Real-Time Applications (OSPERT '19)},
entrysubtype = {Workshop},
month = {July},
title = {ARA: Automatic Instance-Level Analysis in Real-Time Systems},
venue = {Stuttgart, Germany},
year = {2019},
}

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OSPERT Workshop B Best Paper Award
Levels of Specialization in Real-Time Operating Systems

Björn Fiedler, Gerion Entrup, Christian Dietrich, Daniel LohmannProceedings of the 14th Annual Workshop on Operating Systems Platforms for Embedded Real-Time Applications (OSPERT '18)2018Best Paper Award.
PDF [BibTex]

×

BibTex Entry

@inproceedings{fiedler:18:ospert,
author = {Björn Fiedler and Gerion Entrup and Christian Dietrich and Daniel Lohmann},
booktitle = {Proceedings of the 14th Annual Workshop on Operating Systems Platforms for Embedded Real-Time Applications (OSPERT '18)},
entrysubtype = {Workshop},
month = {July},
title = {Levels of Specialization in Real-Time Operating Systems},
venue = {Barcelona, Spain},
year = {2018},
}

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TECS Journal A
Global Optimization of Fixed-Priority Real-Time Systems by RTOS-Aware Control-Flow Analysis

Christian Dietrich, Martin Hoffmann, Daniel LohmannACM Transactions on Embedded Computing Systems16.2ACM Press2017.
PDF Raw Data 10.1145/2950053 [BibTex]

×

BibTex Entry

@article{dietrich:17:tecs,
location = {New York, NY, USA},
author = {Dietrich, Christian and Hoffmann, Martin and Lohmann, Daniel},
doi = {10.1145/2950053},
entrysubtype = {Journal},
journaltitle = {ACM Transactions on Embedded Computing Systems},
number = {2},
pages = {35:1–35:25},
publisher = {ACM Press},
title = {Global Optimization of Fixed-Priority Real-Time Systems by {RTOS}-Aware Control-Flow Analysis},
volume = {16},
year = {2017},
}

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Zephyr documentation: https://docs.zephyrproject.org/latest/index.html