Axel Simon – författare

Abu?erover?owoccurswheninputiswrittenintoamemorybu?erthatisnot large enough to hold the input. Bu?er over?ows may allow a malicious person to gain control over a computer system in that a crafted input can trick the defectiveprogramintoexecutingcodethatisencodedintheinputitself.They are recognised as one of the most widespread forms of security vulnerability, and many workarounds, including new processor features, have been proposed to contain the threat. This book describes a static analysis that aims to prove the absence of bu?er over?ows in C programs. The analysis is conservative in the sense that it locates every possible over?ow. Furthermore, it is fully automatic in that it requires no user annotations in the input program. Thekeyideaoftheanalysisistoinferasymbolicstateforeachp- gram point that describes the possible variable valuations that can arise at that point. The program is correct if the inferred values for array indices and pointer o?sets lie within the bounds of the accessed bu?er. The symbolic state consists of a ?nite set of linear inequalities whose feasible points induce a convex polyhedron that represents an approximation to possible variable valuations. The book formally describes how program operations are mapped to operations on polyhedra and details how to limit the analysis to those p- tionsofstructuresandarraysthatarerelevantforveri?cation.Withrespectto operations on string bu?ers, we demonstrate how to analyse C strings whose length is determined by anul character within the string.

The book formally describes how program operations are mapped to operations on polyhedra and details how to limit the analysis to those p- tionsofstructuresandarraysthatarerelevantforveri?cation.Withrespectto operations on string bu?ers, we demonstrate how to analyse C strings whose length is determined by anul character within the string.

Rarely is an architect as closely connected to his or her place of work as is the case with Armando Ruinelli, born 1954, and his native village of Soglio in Val Bregaglia, Switzerland. Yet, far from what one might expect with such a small and remote place of barely 100 inhabitants, the limitation in this case became a distinction. Ruinelli’s attitude and work have grown organically from the village’s strong stone-built dwellings. Thus, he has become an internationally revered master of building in existing fabric, in particular in an Alpine environment.This first monograph on Armando Ruinelli documents comprehensively his work over nearly four decades. It demonstrates the evolution of his architectural language from the first buildings in Soglio of the 1980s, to conversions of existing buildings and designs for new ones that continue local traditions but also meet today’s demands in housing, and to the latest works, such as the almost abstract studio for Swiss artist Miriam Cahn in Stampa.Photographs and plans, as well as a photo essay newly created for this book by Swiss photographer Katalin Deér, are supplemented with texts and conversations between Ruinelli and his equally renowned fellow architect Gion A. Caminada that illuminate the architect’s work and attitude and convey the particular features of his Alpine environment.Text in Italian and German.