Workshop Program

A summary of the workshop was published in Operating Systems Review, 45(3):1–4, December 2011.
You can download a copy from the ACM Digital Library, or you can download a copy from this Web site.

Time	Topic	Presentation
8:30–10:00	Session 1: Welcome and Keynote
	Welcome and Introductions The PLOS 2011 Organizing Committee
	*Keynote Address: “The Role of Language Technology in Trustworthy Operating Systems”* Gernot Heiser, University of New South Wales and NICTA Recently, programming-language technology has generated strong interest among the designers of operating systems that are to be highly dependable. Several projects are using type-safe/managed language for the implementation of OS kernels. The reader of the literature could be forgiven to think that a memory-safe implementation is a trustworthy implementation. We argue that this is misleading, and trustworthiness requires much more: specifically, functional correctness. The use of type-safe languages alone does not achieve this, and, given the complexity of the runtime system of such languages, may actually make it harder to achieve. We therefore argue that different levels of the software stack call for different PL technologies: simplicity (i.e., C + assembler) is king for building a trustworthy bottom layer, which can then be leveraged to provide a truly trustworthy runtime for managed languages, which in turn should be used to implement higher layers of system software. Gernot Heiser is Scientia Professor and John Lions Chair of Operating Systems at the University of New South Wales (UNSW), and leads the Software Systems Research Group at NICTA, Australia's National Centre of Excellence for ICT Research. He joined NICTA at its creation in 2002, and before that he was a full-time member of academic staff at UNSW from 1991. His past work included the Mungi single-address-space operating system (OS), several unbroken records in IPC performance, and the best-ever reported performance for user-level device drivers. In 2006, Gernot with a number of his students founded Open Kernel Labs, now the market leader in secure operating-systems and virtualization technology for mobile wireless devices. The company's OKL4 operating system, a descendant of L4 kernels developed by his group at UNSW and NICTA, is deployed in more than 1.5 billion mobile devices. This includes the Motorola Evoke, the first (and to date only) mobile phone running a high-level OS (Linux) and a modem stack on the same processor core.
10:00–10:30	Break
10:30–12:00	Session 2a: Static Analyses	Presentation
	Finding Resource-Release Omission Faults in Linux Suman Saha (LIP6-Regal), Julia Lawall (DIKU, University of Copenhagen), and Gilles Muller (INRIA/LIP6-Regal)
	Configuration Coverage in the Analysis of Large-Scale System Software Reinhard Tartler, Daniel Lohmann, Christian Dietrich, Christoph Egger, and Julio Sincero (Friedrich-Alexander University)
	Session 2b: Security
	Rounding Pointers — Type Safe Capabilities with C++ Meta Programming Alexander Warg and Adam Lackorzynski (Technische Universität Dresden)
	Preliminary Design of the SAFE Platform André DeHon, Ben Karel (University of Pennsylvania), Thomas F. Knight, Jr. (BAE Systems), Gregory Malecha (Harvard University), Benoît Montagu (University of Pennsylvania), Robin Morisset (École Normale Supérieure Paris), Greg Morrisett (Harvard University), Benjamin C. Pierce (University of Pennsylvania), Randy Pollack (Harvard University), Sumit Ray (BAE Systems), Olin Shivers (Northeastern University), Jonathan M. Smith (University of Pennsylvania), and Gregory Sullivan (BAE Systems)
12:00–1:30	Lunch
1:30–3:00	Session 3a: Dynamic Safety and Performance	Presentation
	Dynamic Deadlock Avoidance in Systems Code Using Statically Inferred Effects Prodromos Gerakios, Nikolaos Papaspyrou (National Technical University of Athens), Konstantinos Sagonas (National Technical University of Athens and Uppsala University), and Panagiotis Vekris (National Technical University of Athens)
	Using Declarative Invariants for Protecting File-System Integrity Jack Sun, Daniel Fryer, Ashvin Goel, and Angela Demke Brown (University of Toronto)
	Assessing the Scalability of Garbage Collectors on Many Cores Lokesh Gidra, Gaël Thomas, Julien Sopena, and Marc Shapiro (Regal-LIP6/INRIA)
	Session 3b: Reversible Debugging
	URDB: A Universal Reversible Debugger Based on Decomposing Debugging Histories Ana-Maria Visan, Kapil Arya, Gene Cooperman, and Tyler Denniston (Northeastern University)
3:00–3:30	Break
3:30–5:00	Session 4a: Demonstrations and Working Groups
	Demonstrations Workshop attendees participate in demonstrations of the languages and systems presented in earlier sessions. (Approximately 45 minutes.)
	Working Groups Workshop attendees participate in semi-structured discussion groups on PLOS topics, according to their interests. The workshop organizers will use the accepted papers and input from participants to compile a list of topics for working groups.
5:00–6:30	Session 4b: Working Groups and Wrap Up
	Each working group concludes by preparing and presenting an “outbrief” that summarizes its discussion: achievements, positions, opinions, common themes, open issues, closed issues, solved problems, challenge problems, ideas for future activities and collaborations, …
6:30–9:30	SOSP 2011 Buffet Reception

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