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Safe and Efficient Hardware Specialization of Java Applications
Safe and Efficient Hardware Specialization of Java Applications Matt Welsh Computer Science Division University of California, Berkeley Berkeley, CA 94720-1776 USA [email protected] Abstract take full advantage of these interfaces, instead fo- cusing on the other aspects of performance, such as Providing Java applications with access to low-level compilation [18], garbage collection [1], and thread system resources, including fast network and I/O inter- performance [2]. faces, requires functionality not provided by the Java Traditionally, Java applications make use of low- Virtual Machine instruction set. Currently, Java appli- level system functionality through the use of native cations obtain this functionality by executing code writ- ten in a lower-level language, such as C, through a native methods, which are written in a language such as C. method interface. However, the overhead of this inter- To bind native method code to the Java application, face can be very high, and executing arbitrary native a native method interface is used, which has been code raises serious protection and portability concerns. standardized across most JVMs as Sun Microsys- Jaguar [37] provides Java applications with efficient tems' Java Native Interface [29]. However, the use of access to hardware resources through a bytecode spe- native methods raises two important concerns. The cialization technique which transforms Java bytecode first is performance: the cost of traversing the na- sequences to make use of inlined Jaguar bytecode which tive method interface can be quite high, especially implements low-level functionality. Jaguar bytecode is when a large amount of data must be transferred portable and type-exact, making it both safer and more across the Java-native code boundary. -
An OSEK/VDX-Based Multi-JVM for Automotive Appliances
AN OSEK/VDX-BASED MULTI-JVM FOR AUTOMOTIVE APPLIANCES Christian Wawersich, Michael Stilkerich, Wolfgang Schr¨oder-Preikschat University of Erlangen-Nuremberg Distributed Systems and Operating Systems Erlangen, Germany E-Mail: [email protected], [email protected], [email protected] Abstract: The automotive industry has recent ambitions to integrate multiple applications from different micro controllers on a single, more powerful micro controller. The outcome of this integration process is the loss of the physical isolation and a more complex monolithic software. Memory protection mechanisms need to be provided that allow for a safe co-existence of heterogeneous software from different vendors on the same hardware, in order to prevent the spreading of an error to the other applications on the controller and leaving an unclear responsi- bility situation. With our prototype system KESO, we present a Java-based solution for ro- bust and safe embedded real-time systems that does not require any hardware protection mechanisms. Based on an OSEK/VDX operating system, we offer a familiar system creation process to developers of embedded software and also provide the key benefits of Java to the embedded world. To the best of our knowledge, we present the first Multi-JVM for OSEK/VDX operating systems. We report on our experiences in integrating Java and an em- bedded operating system with focus on the footprint and the real-time capabili- ties of the system. Keywords: Java, Embedded Real-Time Systems, Automotive, Isolation, KESO 1. INTRODUCTION Modern cars contain a multitude of micro controllers for a wide area of tasks, ranging from convenience features such as the supervision of the car’s audio system to safety relevant functions such as assisting the braking system of the car. -
A Post-Apocalyptic Sun.Misc.Unsafe World
A Post-Apocalyptic sun.misc.Unsafe World http://www.superbwallpapers.com/fantasy/post-apocalyptic-tower-bridge-london-26546/ Chris Engelbert Twitter: @noctarius2k Jatumba! 2014, 2015, 2016, … Disclaimer This talk is not going to be negative! Disclaimer But certain things are highly speculative and APIs or ideas might change by tomorrow! sun.misc.Scissors http://www.underwhelmedcomic.com/wp-content/uploads/2012/03/runningdude.jpg sun.misc.Unsafe - What you (don’t) know sun.misc.Unsafe - What you (don’t) know • Internal class (sun.misc Package) sun.misc.Unsafe - What you (don’t) know • Internal class (sun.misc Package) sun.misc.Unsafe - What you (don’t) know • Internal class (sun.misc Package) • Used inside the JVM / JRE sun.misc.Unsafe - What you (don’t) know • Internal class (sun.misc Package) • Used inside the JVM / JRE // Unsafe mechanics private static final sun.misc.Unsafe U; private static final long QBASE; private static final long QLOCK; private static final int ABASE; private static final int ASHIFT; static { try { U = sun.misc.Unsafe.getUnsafe(); Class<?> k = WorkQueue.class; Class<?> ak = ForkJoinTask[].class; example: QBASE = U.objectFieldOffset (k.getDeclaredField("base")); java.util.concurrent.ForkJoinPool QLOCK = U.objectFieldOffset (k.getDeclaredField("qlock")); ABASE = U.arrayBaseOffset(ak); int scale = U.arrayIndexScale(ak); if ((scale & (scale - 1)) != 0) throw new Error("data type scale not a power of two"); ASHIFT = 31 - Integer.numberOfLeadingZeros(scale); } catch (Exception e) { throw new Error(e); } } } sun.misc.Unsafe -
Openjdk – the Future of Open Source Java on GNU/Linux
OpenJDK – The Future of Open Source Java on GNU/Linux Dalibor Topić Java F/OSS Ambassador Blog aggregated on http://planetjdk.org Java Implementations Become Open Source Java ME, Java SE, and Java EE 2 Why now? Maturity Java is everywhere Adoption F/OSS growing globally Innovation Faster progress through participation 3 Why GNU/Linux? Values Freedom as a core value Stack Free Software above and below the JVM Demand Increasing demand for Java integration 4 Who profits? Developers New markets, new possibilities Customers More innovations, reduced risk Sun Mindshare, anchoring Java in GNU/Linux 5 License + Classpath GPL v2 Exception • No proprietary forks (for SE, EE) • Popular & trusted • Programs can have license any license • Compatible with • Improvements GNU/Linux remain in the community • Fostering adoption • FSFs license for GNU Classpath 6 A Little Bit Of History Jun 1996: Work on gcj starts Nov 1996: Work on Kaffe starts Feb 1998: First GNU Classpath Release Mar 2000: GNU Classpath and libgcj merge Dec 2002: Eclipse runs on gcj/Classpath Oct 2003: Kaffe switches to GNU Classpath Feb 2004: First FOSDEM Java Libre track Apr 2004: Richard Stallman on the 'Java Trap' Jan 2005: OpenOffice.org runs on gcj Mai 2005: Work on Harmony starts 7 Sun & Open Source Java RIs Juni 2005: Java EE RI Glassfish goes Open Source Mai 2006: First Glassfish release Mai 2006: Java announced to go Open Source November 2006: Java ME RI PhoneME goes Open Source November 2006: Java SE RI Hotspot und Javac go Open Source Mai 2007: The rest of Java SE follows suit 8 Status: JavaOne, Mai 2007 OpenJDK can be fully built from source, 'mostly' Open Source 25,169 Source code files 894 (4%) Binary files (“plugs”) 1,885 (8%) Open Source, though not GPLv2 The rest is GPLv2 (+ CP exception) Sun couldn't release the 4% back then as free software. -
Free Java Developer Room
Room: AW1.121 Free Java Developer Room Saturday 2008-02-23 14:00-15:00 Welcome to the Free Java Meeting Welcome and introduction to the projects, people and themes that make Rich Sands – Mark Reinhold – Mark up the Free Java Meeting at Fosdem. ~ GNU Classpath ~ OpenJDK Wielaard – Tom Marble 15:00-16:00 Mobile Java Take your freedom to the max! Make your Free Java mobile. Christian Thalinger - Guillaume ~ CACAO Embedded ~ PhoneME ~ Midpath Legris - Ray Gans 16:00-16:40 Women in Java Technology Female programmers are rare. Female Java programmers are even more Clara Ko - Linda van der Pal rare. ~ Duchess, Ladies in Java Break 17:00-17:30 Hacking OpenJDK & Friends Hear about directions in hacking Free Java from the front lines. Roman Kennke - Andrew Hughes ~ OpenJDK ~ BrandWeg ~ IcePick 17:30-19:00 VM Rumble, Porting and Architectures Dalibor Topic - Robert Lougher - There are lots of runtimes able to execute your java byte code. But which Peter Kessler - Ian Rogers - one is the best, coolest, smartest, easiest portable or just simply the most fun? ~ Kaffe ~ JamVM ~ HotSpot ~ JikesRVM ~ CACAO ~ ikvm ~ Zero- Christian Thalinger - Jeroen Frijters assembler Port ~ Mika - Gary Benson - Chris Gray Sunday 2008-02-24 9:00-10:00 Distro Rumble So which GNU/Linux distribution integrates java packages best? Find out Petteri Raty - Tom Fitzsimmons - during this distro shootout! ~ Gentoo ~ Fedora ~ Debian ~ Ubuntu Matthias Klose 10:00-11:30 The Free Java Factory OpenJDK and IcedTea, how are they made and how do you test them? David Herron - Lillian Angel - Tom ~ OpenJDK ~ IcedTea Fitzsimmons 11:30-13:00 JIT Session: Discussion Topics Dynamically Loaded Want to hear about -- or talk about -- something the Free Java world and don't see a topic on the agenda? This time is reserved for late binding Tom Marble discussion. -
Eclipse (Software) 1 Eclipse (Software)
Eclipse (software) 1 Eclipse (software) Eclipse Screenshot of Eclipse 3.6 Developer(s) Free and open source software community Stable release 3.6.2 Helios / 25 February 2011 Preview release 3.7M6 / 10 March 2011 Development status Active Written in Java Operating system Cross-platform: Linux, Mac OS X, Solaris, Windows Platform Java SE, Standard Widget Toolkit Available in Multilingual Type Software development License Eclipse Public License Website [1] Eclipse is a multi-language software development environment comprising an integrated development environment (IDE) and an extensible plug-in system. It is written mostly in Java and can be used to develop applications in Java and, by means of various plug-ins, other programming languages including Ada, C, C++, COBOL, Perl, PHP, Python, Ruby (including Ruby on Rails framework), Scala, Clojure, and Scheme. The IDE is often called Eclipse ADT for Ada, Eclipse CDT for C/C++, Eclipse JDT for Java, and Eclipse PDT for PHP. The initial codebase originated from VisualAge.[2] In its default form it is meant for Java developers, consisting of the Java Development Tools (JDT). Users can extend its abilities by installing plug-ins written for the Eclipse software framework, such as development toolkits for other programming languages, and can write and contribute their own plug-in modules. Released under the terms of the Eclipse Public License, Eclipse is free and open source software. It was one of the first IDEs to run under GNU Classpath and it runs without issues under IcedTea. Eclipse (software) 2 Architecture Eclipse employs plug-ins in order to provide all of its functionality on top of (and including) the runtime system, in contrast to some other applications where functionality is typically hard coded. -
Java in Embedded Linux Systems
Java in Embedded Linux Systems Java in Embedded Linux Systems Thomas Petazzoni / Michael Opdenacker Free Electrons http://free-electrons.com/ Created with OpenOffice.org 2.x Java in Embedded Linux Systems © Copyright 2004-2007, Free Electrons, Creative Commons Attribution-ShareAlike 2.5 license http://free-electrons.com Sep 15, 2009 1 Rights to copy Attribution ± ShareAlike 2.5 © Copyright 2004-2008 You are free Free Electrons to copy, distribute, display, and perform the work [email protected] to make derivative works to make commercial use of the work Document sources, updates and translations: Under the following conditions http://free-electrons.com/articles/java Attribution. You must give the original author credit. Corrections, suggestions, contributions and Share Alike. If you alter, transform, or build upon this work, you may distribute the resulting work only under a license translations are welcome! identical to this one. For any reuse or distribution, you must make clear to others the license terms of this work. Any of these conditions can be waived if you get permission from the copyright holder. Your fair use and other rights are in no way affected by the above. License text: http://creativecommons.org/licenses/by-sa/2.5/legalcode Java in Embedded Linux Systems © Copyright 2004-2007, Free Electrons, Creative Commons Attribution-ShareAlike 2.5 license http://free-electrons.com Sep 15, 2009 2 Best viewed with... This document is best viewed with a recent PDF reader or with OpenOffice.org itself! Take advantage of internal -
Secure Control Applications in Smart Homes and Buildings
Die approbierte Originalversion dieser Dissertation ist in der Hauptbibliothek der Technischen Universität Wien aufgestellt und zugänglich. http://www.ub.tuwien.ac.at The approved original version of this thesis is available at the main library of the Vienna University of Technology. http://www.ub.tuwien.ac.at/eng Secure Control Applications in Smart Homes and Buildings DISSERTATION submitted in partial fulfillment of the requirements for the degree of Doktor der Technischen Wissenschaften by Mag. Dipl.-Ing. Friedrich Praus Registration Number 0025854 to the Faculty of Informatics at the Vienna University of Technology Advisor: Ao.Univ.Prof. Dipl.-Ing. Dr.techn. Wolfgang Kastner The dissertation has been reviewed by: Ao.Univ.Prof. Dipl.-Ing. Prof. Dr. Peter Palensky Dr.techn. Wolfgang Kastner Vienna, 1st October, 2015 Mag. Dipl.-Ing. Friedrich Praus Technische Universität Wien A-1040 Wien Karlsplatz 13 Tel. +43-1-58801-0 www.tuwien.ac.at Erklärung zur Verfassung der Arbeit Mag. Dipl.-Ing. Friedrich Praus Hallergasse 11/29, A-1110 Wien Hiermit erkläre ich, dass ich diese Arbeit selbständig verfasst habe, dass ich die verwen- deten Quellen und Hilfsmittel vollständig angegeben habe und dass ich die Stellen der Arbeit – einschließlich Tabellen, Karten und Abbildungen –, die anderen Werken oder dem Internet im Wortlaut oder dem Sinn nach entnommen sind, auf jeden Fall unter Angabe der Quelle als Entlehnung kenntlich gemacht habe. Wien, 1. Oktober 2015 Friedrich Praus v Kurzfassung Die zunehmende Integration von heterogenen Gebäudeautomationssystemen ermöglicht gesteigerten Komfort, Energieeffizienz, verbessertes Gebäudemanagement, Nachhaltig- keit sowie erweiterte Anwendungsgebiete, wie beispielsweise “Active Assisted Living” Szenarien. Diese Smart Homes und Gebäude sind heutzutage als dezentrale Systeme rea- lisiert, in denen eingebettete Geräte Prozessdaten über ein Netzwerk austauschen. -
Web Services Edge East Conference & Expo Featuring FREE Tutorials, Training Sessions, Case Studies and Exposition
JAVA & LINUX FOCUS ISSUE TM Java COM Conference: January 21-24, 2003 Expo: January 22-24, 2003 www.linuxworldexpo.com The Javits Center New York, NY see details on page 55 From the Editor Alan Williamson pg. 5 Java & Linux A Marriage Made in Heaven pg. 6 TCO for Linux Linux Fundamentals: Tools of the Trade Mike McCallister ...and J2EE Projects pg. 8 Programming Java in Linux – a basic tour $40010 60 Linux Vendors Life Is About Choices pg. 26 Feature: Managing HttpSession Objects2003 SAVEBrian A. Russell 8 PAGE CONFERENCE Create a well-designed session for a better Web appEAST INSERT PAGE18 63 Career Opportunities Bill Baloglu & Billy Palmieri DGE pg. 72 Integration: PackagingE Java Applications Ian McFarland for OS X Have great looking double-clickable applications 28 Java News ERVICES pg. 60 S EB Specifications: JCP Expert Group Jim Van Peursem JDJ-IN ExcerptsW Experiences – JSR-118 An inside look at the process 42 SPECIALpg. 61 INTERNATIONAL WEB SERVICES CONFERENCE & EXPO Letters to the Editor Feature: The New PDA Profile Jim Keogh OFFER!pg. 62 The right tool for J2ME developers 46 RETAILERS PLEASE DISPLAY UNTIL MARCH 31, 2003 Product Review: exe4j Jan Boesenberg by ej-technologies – a solid piece of software 56 Interview: JDJ Asks ...Sun on Java An exclusive chance to find out what’s going on at Sun 58 SYS -CON Blair Wyman MEDIA Cubist Threads: ‘(Frozen)’ A snow-packed Wyoming highway adventure 74 Everybody’s focused on exposing applications as Web services while letting someone else figure out how to connect them. We’re that someone else. -
D2.1.5 Final Reports on Requirements, Architecture, and Components for Single Trusted Clouds
D2.1.5 Final Reports on Requirements, Architecture, and Components for Single Trusted Clouds Project number: 257243 Project acronym: TClouds Trustworthy Clouds - Privacy and Re- Project title: silience for Internet-scale Critical Infras- tructure Start date of the project: 1st October, 2010 Duration: 36 months Programme: FP7 IP Deliverable type: Report Deliverable reference number: ICT-257243 / D2.1.5 / 1.0 Activity and Work package contributing Activity 2 / WP 2.1 to deliverable: Due date: September 2013 – M36 Actual submission date: 30th September, 2013 Responsible organisation: SRX Editor: Norbert Schirmer Dissemination level: Public Revision: 1.0 Abstract: cf. Executive Summary Trusted computing, remote attestation, se- cure logging, confidentiality for commodity Keywords: cloud storage, efficient resilience, tailored components D2.1.5 – Final Reports on Requirements, Architecture, and Components for Single Trusted Clouds Editor Norbert Schirmer (SRX) Contributors Johannes Behl, Stefan Brenner, Klaus Stengel (TUBS) Nicola Barresi, Gianluca Ramunno, Roberto Sassu, Paolo Smiraglia (POL) Alexander Büger, Norbert Schirmer (SRX) Tobias Distler, Andreas Ruprecht (FAU) Sören Bleikertz, Zoltan Nagy (IBM) Imad M. Abbadi, Anbang Ruad (OXFD) Sven Bugiel, Hugo Hideler, Stefan Nürnberger (TUDA) Disclaimer This work was partially supported by the European Commission through the FP7-ICT program under project TClouds, number 257243. The information in this document is provided as is, and no warranty is given or implied that the information is fit for -
Jaké Je to Vyvíjet Prekladace?
Jak to zacalo?ˇ What’s GNU? Gnu’s Not Unix! AMD64 port a SUSE GCC dnes Jaké je to vyvíjet prekladaˇ ce?ˇ Jan Hubickaˇ Katedra aplikované matematiky Filosofické problémy informatiky Jak to zacalo?ˇ What’s GNU? Gnu’s Not Unix! AMD64 port a SUSE GCC dnes Co je GCC GNU Compiler collection: • Prekladaˇ cˇ C, C++, obj-C, obj-C++, Fortranu, Ady, Go,. • Podporující více než 50 procesor˚ua nekolikˇ set target˚u(kombinací procesor+OS) • Vyvjený od 80. let jako jeden ze základních balík˚uGNU projektu • První verze vydaná v roce 1987 • Verze 8 vyjde tento týden? • 10m rádek,ˇ cca 100-150 aktivních vývojár˚u,odhademˇ 2000 clovˇ ekoletˇ Hacker na MIT od 1971. V záríˇ 1983 oznamuje GNU operating system. 1984 ochází a venujeˇ se GNU projektu. Zacalˇ vyvíjet základní nástroje Emacs, GCC, GDB, make, . Jak to zacalo?ˇ What’s GNU? Gnu’s Not Unix! AMD64 port a SUSE GCC dnes Richard Mathew Stallman (RMS) vs Xerox 9700 Hacker na MIT od 1971. V záríˇ 1983 oznamuje GNU operating system. 1984 ochází a venujeˇ se GNU projektu. Zacalˇ vyvíjet základní nástroje Emacs, GCC, GDB, make, . Jak to zacalo?ˇ What’s GNU? Gnu’s Not Unix! AMD64 port a SUSE GCC dnes Richard Mathew Stallman (RMS) vs Xerox 9700 Jak to zacalo?ˇ What’s GNU? Gnu’s Not Unix! AMD64 port a SUSE GCC dnes Richard Mathew Stallman (RMS) vs Xerox 9700 Hacker na MIT od 1971. V záríˇ 1983 oznamuje GNU operating system. 1984 ochází a venujeˇ se GNU projektu. Zacalˇ vyvíjet základní nástroje Emacs, GCC, GDB, make, . -
Effective Inline-Threaded Interpretation of Java Bytecode
Effective Inline-Threaded Interpretation of Java Bytecode Using Preparation Sequences Etienne Gagnon1 and Laurie Hendren2 1 Sable Research Group Universit´eduQu´ebec `a Montr´eal, [email protected] 2 McGill University Montreal, Canada, [email protected] Abstract. Inline-threaded interpretation is a recent technique that im- proves performance by eliminating dispatch overhead within basic blocks for interpreters written in C [11]. The dynamic class loading, lazy class initialization, and multi-threading features of Java reduce the effective- ness of a straight-forward implementation of this technique within Java interpreters. In this paper, we introduce preparation sequences, a new technique that solves the particular challenge of effectively inline-threa- ding Java. We have implemented our technique in the SableVM Java virtual machine, and our experimental results show that using our tech- nique, inline-threaded interpretation of Java, on a set of benchmarks, achieves a speedup ranging from 1.20 to 2.41 over switch-based inter- pretation, and a speedup ranging from 1.15 to 2.14 over direct-threaded interpretation. 1 Introduction One of the main advantages of interpreters written in high-level languages is their simplicity and portability, when compared to static and dynamic compiler-based systems. One of their main drawbacks is poor performance, due to a high cost for dispatching interpreted instructions. In [11], Piumarta and Riccardi introduced a technique called inlined-threading which reduces this overhead by dynamically inlining instruction sequences within basic blocks, leaving a single instruction dispatch at the end of each sequence. To our knowledge, inlined-threading has not been applied to Java interpreters before.