APARTS

Advanced Program Analysis for Real-Time Systems

Coordinatore	MAELARDALENS HOEGSKOLA    more  Organization address address: HOGSKOLEPLAN 1 city: VASTERAS postcode: 721 23 contact info Titolo: Prof. Nome: Björn Cognome: Lisper Email: send email Telefono: 4621151709 Fax: 4621101460
Nazionalità Coordinatore	Sweden [SE]
Totale costo	193˙496 €
EC contributo	193˙496 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-2009-IAPP
Funding Scheme	MC-IAPP
Anno di inizio	2010
Periodo (anno-mese-giorno)	2010-12-01   -   2014-11-30

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	MAELARDALENS HOEGSKOLA  Organization address address: HOGSKOLEPLAN 1 city: VASTERAS postcode: 721 23 contact info Titolo: Prof. Nome: Björn Cognome: Lisper Email: send email Telefono: 4621151709 Fax: 4621101460	SE (VASTERAS)	coordinator	131˙572.00
2	TIDORUM OY  Organization address address: Tiirasaarentie 32 city: Helsinki postcode: FI 00200 contact info Titolo: Dr. Nome: Niklas Cognome: Holsti Email: send email Telefono: +358 40 563 9186 Fax: +358 42 563 9186	FI (Helsinki)	participant	61˙924.00

Mappa

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 Obiettivo del progetto (Objective)

'The real-time performance of embedded software is often critical for the safety and quality of the software-controlled system. Recent research has made it possible to find safe bounds on the worst-case execution time (WCET) of a program by statically analysing the machine-code program. A crucial step is the analysis of the program's computations on integer data. For instance, the program flow usually depends on such computations. Current WCET tools often require program flow constraints to be provided manually, which is cumbersome and error-prone. Better analyses of integer computations would reduce the need for such manual intervention. Such analyses must be both precise and correct. The mathematical models for such analyses are usually formulated in terms of mathematical integers of unbounded size, while the program actually uses data stored in a fixed number of bits. This can lead to incorrect or imprecise results. We aim to improve WCET analysis by incorporating computation models that give bit-precise results reflecting the finite size of each variable and the possibility of overflow. Most current WCET-analysis tools analyse the possible values of each variable separately, commonly producing an interval of possible values for each variable. However, the behaviour of the program, and thus its WCET, often depend strongly on the relationship between variable values. Ignoring such relationships can make the analysis fail or give over-estimated WCET bounds. We aim to develop computation models that find and use such relationships, typically expressed as affine constraints between several variables. The end goal is WCET analysis with computation models that are both relational and bit-precise. We expect that this will increase the safety, precision, and level of automation of the analysis, and lead to WCET analysis tools that are easier to apply,'