Schnek: a C++ Library for the Development of Parallel Simulation Codes on Regular Grids.” Computer Physics Communications, Vol
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Ragel State Machine Compiler User Guide
Ragel State Machine Compiler User Guide by Adrian Thurston License Ragel version 6.3, August 2008 Copyright c 2003-2007 Adrian Thurston This document is part of Ragel, and as such, this document is released under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. Ragel is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR- POSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Ragel; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA i Contents 1 Introduction 1 1.1 Abstract...........................................1 1.2 Motivation.........................................1 1.3 Overview..........................................2 1.4 Related Work........................................4 1.5 Development Status....................................5 2 Constructing State Machines6 2.1 Ragel State Machine Specifications............................6 2.1.1 Naming Ragel Blocks...............................7 2.1.2 Machine Definition.................................7 2.1.3 Machine Instantiation...............................7 2.1.4 Including Ragel Code...............................7 2.1.5 Importing Definitions...............................7 2.2 Lexical Analysis of a Ragel Block.............................8 -
Mda13:Hpg-Variant-Developers.Pdf
Overview Global schema: Binaries HPG Variant VCF Tools HPG Variant Effect HPG Variant GWAS Describing the architecture by example: GWAS Main workflow Reading configuration files and command-line options Parsing input files Parallelization schema How to compile: Dependencies and application Hacking HPG Variant Let's talk about... Global schema: Binaries HPG Variant VCF Tools HPG Variant Effect HPG Variant GWAS Describing the architecture by example: GWAS Main workflow Reading configuration files and command-line options Parsing input files Parallelization schema How to compile: Dependencies and application Hacking HPG Variant Binaries: HPG Variant VCF Tools HPG Variant VCF Tools preprocesses VCF files I Filtering I Merging I Splitting I Retrieving statistics Binaries: HPG Variant Effect HPG Variant Effect retrieves information about the effect of mutations I Querying a web service I Uses libcurl (client side) and JAX-RS/Jersey (server side) I Information stored in CellBase DB Binaries: HPG Variant GWAS HPG Variant GWAS conducts genome-wide association studies I Population-based: Chi-square, Fisher's exact test I Family-based: TDT I Read genotypes from VCF files I Read phenotypes and familial information from PED files Let's talk about... Global schema: Binaries HPG Variant VCF Tools HPG Variant Effect HPG Variant GWAS Describing the architecture by example: GWAS Main workflow Reading configuration files and command-line options Parsing input files Parallelization schema How to compile: Dependencies and application Hacking HPG Variant Architecture: Main workflow -
UNIVERSITY of TRENTO Degree Course in Computer
UNIVERSITY OF TRENTO Department of Information Engineering and Computer Science Degree course in Computer Science Final Thesis GHERKIN* AND CUCUMBER* ANEWTESTCASEPATHCOMPOSITIONAPPROACH TO TESTING RUBY ON RAILS WEB APPLICATIONS Supervisor: Graduant: Prof. Maurizio Marchese Roberto Zen Co-Supervisor: Prof. Adolfo Villafiorita Academic year 2013-2014 Ai miei genitori A mio fratello Acknowledgements I would like to thank my supervisor Maurizio Marchese for his encourage- ment and support during the writing of this composition. My work would have never been carried out without the help of the whole ICT4G Unit of Fondazione Bruno Kessler. In particular, I would like to thank Prof. Adolfo Villafiorita for his help and his patience with me during these last two years. You are a mentor for me. Thanks also to Prof. Alberto Montresor for the useful discussion we had. Thanks to my family for supporting me during my studies. I want to sincerely express my gratitude and thanks to my best friends: Stefano, Sara, Sveva and Antonio. I also acknowledge my roommates and friends: Victor, Damiano and Diego. I would like also to thank all my friends, particularly Mirko Za↵aroni, Gio- vanni Bonetta, Andrea Sosi, Giovanni De Francesco, Giulio Fornasaro, Luca Zamboni, Amedeo Calafiore, Andrea Balzan, Chiara Salvagno, Lucia Pilat, Anna Giamosa and Federica Stetka. Contents Abstract iv 1 Introduction 1 1.1 Motivations . 3 1.2 Goals . 3 1.3 Results............................... 3 1.4 Outline .............................. 4 2 State of the art 5 2.1 Introduction............................ 5 2.2 Ruby and its approach to testing . 5 2.3 RSpec and Capybara . 6 2.4 Gherkin ............................. -
Confine: Automated System Call Policy Generation for Container
Confine: Automated System Call Policy Generation for Container Attack Surface Reduction Seyedhamed Ghavamnia Tapti Palit Azzedine Benameur Stony Brook University Stony Brook University Cloudhawk.io Michalis Polychronakis Stony Brook University Abstract The performance gains of containers, however, come to the Reducing the attack surface of the OS kernel is a promising expense of weaker isolation compared to VMs. Isolation be- defense-in-depth approach for mitigating the fragile isola- tween containers running on the same host is enforced purely in tion guarantees of container environments. In contrast to software by the underlying OS kernel. Therefore, adversaries hypervisor-based systems, malicious containers can exploit who have access to a container on a third-party host can exploit vulnerabilities in the underlying kernel to fully compromise kernel vulnerabilities to escalate their privileges and fully com- the host and all other containers running on it. Previous con- promise the host (and all the other containers running on it). tainer attack surface reduction efforts have relied on dynamic The trusted computing base in container environments analysis and training using realistic workloads to limit the essentially comprises the entire kernel, and thus all its set of system calls exposed to containers. These approaches, entry points become part of the attack surface exposed to however, do not capture exhaustively all the code that can potentially malicious containers. Despite the use of strict potentially be needed by future workloads or rare runtime software isolation mechanisms provided by the OS, such as conditions, and are thus not appropriate as a generic solution. capabilities [1] and namespaces [18], a malicious tenant can Aiming to provide a practical solution for the protection leverage kernel vulnerabilities to bypass them. -
Operating System Support for Run-Time Security with a Trusted Execution Environment
Operating System Support for Run-Time Security with a Trusted Execution Environment - Usage Control and Trusted Storage for Linux-based Systems - by Javier Gonz´alez Ph.D Thesis IT University of Copenhagen Advisor: Philippe Bonnet Submitted: January 31, 2015 Last Revision: May 30, 2015 ITU DS-nummer: D-2015-107 ISSN: 1602-3536 ISBN: 978-87-7949-302-5 1 Contents Preface8 1 Introduction 10 1.1 Context....................................... 10 1.2 Problem....................................... 12 1.3 Approach...................................... 14 1.4 Contribution.................................... 15 1.5 Thesis Structure.................................. 16 I State of the Art 18 2 Trusted Execution Environments 20 2.1 Smart Cards.................................... 21 2.1.1 Secure Element............................... 23 2.2 Trusted Platform Module (TPM)......................... 23 2.3 Intel Security Extensions.............................. 26 2.3.1 Intel TXT.................................. 26 2.3.2 Intel SGX.................................. 27 2.4 ARM TrustZone.................................. 29 2.5 Other Techniques.................................. 32 2.5.1 Hardware Replication........................... 32 2.5.2 Hardware Virtualization.......................... 33 2.5.3 Only Software............................... 33 2.6 Discussion...................................... 33 3 Run-Time Security 36 3.1 Access and Usage Control............................. 36 3.2 Data Protection................................... 39 3.3 Reference -
Ragel State Machine Compiler User Guide
Ragel State Machine Compiler User Guide by Adrian Thurston License Ragel version 6.6, Dec 2009 Copyright c 2003-2007 Adrian Thurston This document is part of Ragel, and as such, this document is released under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. Ragel is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR- POSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Ragel; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA i Contents 1 Introduction 1 1.1 Abstract...........................................1 1.2 Motivation.........................................1 1.3 Overview..........................................2 1.4 Related Work........................................4 1.5 Development Status....................................5 2 Constructing State Machines6 2.1 Ragel State Machine Specifications............................6 2.1.1 Naming Ragel Blocks...............................7 2.1.2 Machine Definition.................................7 2.1.3 Machine Instantiation...............................7 2.1.4 Including Ragel Code...............................7 2.1.5 Importing Definitions...............................7 2.2 Lexical Analysis of a Ragel Block.............................8 2.3 Basic Machines.......................................8 2.4 Operator Precedence.................................... 11 2.5 Regular Language Operators............................... 11 2.5.1 Union........................................ 12 2.5.2 Intersection..................................... 12 2.5.3 Difference...................................... 13 2.5.4 Strong Difference.................................. 13 2.5.5 Concatenation................................... 14 2.5.6 Kleene Star.................................... -
Spirit 2.1 Joel De Guzman Hartmut Kaiser Copyright © 2001-2009 Joel De Guzman, Hartmut Kaiser
Spirit 2.1 Joel de Guzman Hartmut Kaiser Copyright © 2001-2009 Joel de Guzman, Hartmut Kaiser Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) Table of Contents Preface ................................................................................................................................................................. 3 What's New .......................................................................................................................................................... 6 Introduction .......................................................................................................................................................... 8 Structure ............................................................................................................................................................. 13 Include ....................................................................................................................................................... 13 Abstracts ............................................................................................................................................................ 15 Syntax Diagram ........................................................................................................................................... 15 Parsing Expression Grammar ......................................................................................................................... -
Writing Parsers Like It Is 2017
Writing parsers like it is 2017 Pierre Chifflier1 and Geoffroy Couprie2 [email protected] [email protected] 1 ANSSI 2 Clever Cloud Abstract. Despite being known since a long time, memory violations are still a very important cause of security problems in low-level programming languages containing data parsers. We address this problem by proposing a pragmatic solution to fix not only bugs, but classes of bugs. First, using a fast and safe language such as Rust, and then using a parser combinator. We discuss the advantages and difficulties of this solution, and we present two cases of how to implement safe parsers and insert them in large C projects. The implementation is provided as a set of parsers and projects in the Rust language. 1 Introduction 1.1 Manipulating data and related problems In 2016, like every year for a long time, memory corruption bugs have been one of the first causes of vulnerabilities of compiled programs [2]. When looking at the C programming language, many errors lead to memory corruption: buffer overflow, use after free, double free, etc. Some of these issues can be complicated to diagnose, and the consequence is that a huge quantity of bugs is hidden in almost all C software. Any software manipulating untrusted data is particularly exposed: it needs to parse and interpret data that can be controlled by the attacker. Unfortunately, data parsing is often done in a very unsafe way, especially for network protocols and file formats. For example, many bugs were discovered in media parsing libraries in Android [12], leading to the possible remote exploitation of all devices by a simple MMS message. -
Ragel State Machine Compiler User Guide
Ragel State Machine Compiler User Guide by Adrian Thurston License Ragel version 5.16, November 2006 Copyright c 2003, 2004, 2005, 2006 Adrian Thurston This document is part of Ragel, and as such, this document is released under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. Ragel is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Ragel; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA i Contents 1 Introduction 1 1.1 Abstract . 1 1.2 Motivation . 1 1.3 Overview . 2 1.4 Related Work . 4 1.5 Development Status . 5 2 Constructing State Machines 7 2.1 Ragel State Machine Specifications . 7 2.1.1 Naming Ragel Blocks . 7 2.1.2 Including Ragel Code . 8 2.1.3 Machine Definition . 8 2.1.4 Machine Instantiation . 8 2.2 Lexical Analysis of an FSM Specification . 9 2.3 Basic Machines . 9 2.4 Operator Precedence . 12 2.5 Regular Language Operators . 12 2.5.1 Union . 13 2.5.2 Intersection . 14 2.5.3 Difference . 14 2.5.4 Strong Difference . 15 2.5.5 Concatenation . 15 2.5.6 Kleene Star . 16 2.5.7 One Or More Repetition . -
Master Thesis
Charles University in Prague Faculty of Mathematics and Physics MASTER THESIS Petr Koupý Graphics Stack for HelenOS Department of Distributed and Dependable Systems Supervisor of the master thesis: Mgr. Martin Děcký Study programme: Informatics Specialization: Software Systems Prague 2013 I would like to thank my supervisor, Martin Děcký, not only for giving me an idea on how to approach this thesis but also for his suggestions, numerous pieces of advice and significant help with code integration. Next, I would like to express my gratitude to all members of Hele- nOS developer community for their swift feedback and for making HelenOS such a good plat- form for works like this. Finally, I am very grateful to my parents and close family members for supporting me during my studies. I declare that I carried out this master thesis independently, and only with the cited sources, literature and other professional sources. I understand that my work relates to the rights and obligations under the Act No. 121/2000 Coll., the Copyright Act, as amended, in particular the fact that the Charles University in Pra- gue has the right to conclude a license agreement on the use of this work as a school work pursuant to Section 60 paragraph 1 of the Copyright Act. In Prague, March 27, 2013 Petr Koupý Název práce: Graphics Stack for HelenOS Autor: Petr Koupý Katedra / Ústav: Katedra distribuovaných a spolehlivých systémů Vedoucí diplomové práce: Mgr. Martin Děcký Abstrakt: HelenOS je experimentální operační systém založený na mikro-jádrové a multi- serverové architektuře. Před započetím této práce již HelenOS obsahoval početnou množinu moderně navržených subsystémů zajišťujících různé úkoly v rámci systému. -
Ragel State Machine Compiler User Guide
Ragel State Machine Compiler User Guide by Adrian Thurston License Ragel version 6.9, Oct 2014 Copyright c 2003-2007 Adrian Thurston This document is part of Ragel, and as such, this document is released under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. Ragel is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR- POSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Ragel; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA i Contents 1 Introduction 1 1.1 Abstract...........................................1 1.2 Motivation.........................................1 1.3 Overview..........................................2 1.4 Related Work........................................4 1.5 Development Status....................................5 2 Constructing State Machines6 2.1 Ragel State Machine Specifications............................6 2.1.1 Naming Ragel Blocks...............................7 2.1.2 Machine Definition.................................7 2.1.3 Machine Instantiation...............................7 2.1.4 Including Ragel Code...............................7 2.1.5 Importing Definitions...............................7 2.2 Lexical Analysis of a Ragel Block.............................8 2.3 Basic Machines.......................................8 2.4 Operator Precedence.................................... 11 2.5 Regular Language Operators............................... 11 2.5.1 Union........................................ 12 2.5.2 Intersection..................................... 12 2.5.3 Difference...................................... 13 2.5.4 Strong Difference.................................. 13 2.5.5 Concatenation................................... 14 2.5.6 Kleene Star.................................... -
Ragel State Machine Compiler User Guide
Ragel State Machine Compiler User Guide by Adrian Thurston License Ragel version 5.21, May 2007 Copyright c 2003-2007 Adrian Thurston This document is part of Ragel, and as such, this document is released under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. Ragel is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR- POSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Ragel; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA i Contents 1 Introduction 1 1.1 Abstract . 1 1.2 Motivation . 1 1.3 Overview . 2 1.4 Related Work . 4 1.5 Development Status . 5 2 Constructing State Machines 6 2.1 Ragel State Machine Specifications . 6 2.1.1 Naming Ragel Blocks . 7 2.1.2 Including Ragel Code . 7 2.1.3 Importing Definitions . 7 2.1.4 Machine Definition . 7 2.1.5 Machine Instantiation . 7 2.2 Lexical Analysis of a Ragel Block . 8 2.3 Basic Machines . 8 2.4 Operator Precedence . 10 2.5 Regular Language Operators . 11 2.5.1 Union . 12 2.5.2 Intersection . 12 2.5.3 Difference . 13 2.5.4 Strong Difference . 13 2.5.5 Concatenation . 14 2.5.6 Kleene Star .