International Workshop on Aliasing, Confinement and Ownership in object-oriented programming (IWACO)

July 30, 2007

in conjunction with ECOOP 2007

Berlin, Germany July 30th to August 3rd


Front page    Call for papers    Accepted papers    Schedule    IWACO 2008


The power of objects lies in the flexibility of their interconnection structure. But this flexibility comes at a cost. Because an object can be modified via any alias, object-oriented programs are hard to understand, maintain, and analyse. Aliasing makes objects depend on their environment in unpredictable ways, breaking the encapsulation necessary for reliable software components, making it difficult to reason about and optimise programs, obscuring the flow of information between objects, and introducing security problems.

Aliasing is a fundamental difficulty, but we accept its presence. Instead we seek techniques for describing, reasoning about, restricting, analysing, and preventing the connections between objects and/or the flow of information between them. Promising approaches to these problems are based on ownership, confinement, information flow, sharing control, escape analysis, argument independence, read-only references, effects systems, and access control mechanisms.

The workshop will generally address the question how to manage interconnected object structures in the presence of aliasing. In particular, we will consider the following issues (among others):

Invited Speaker

Vijay Saraswat, IBM TJ Watson Research Lab and Penn State University

Programme Committee

Jonathan Aldrich(Carnegie Mellon University)
Chandrasekhar Boyapati(University of Michigan)
Dave Clarke(CWI)
Sophia Drossopoulou(Imperial College)
Rustan Leino(Microsoft Research)
Peter Müller(ETH Zurich)
James Noble(Victoria University of Wellington)
Peter O'Hearn(Queen Mary, University of London)
Alex Potanin(Victoria University of Wellington)
Jan Vitek(Purdue University)
Tobias Wrigstad(Stockholm University)


Dave Clarke(CWI)
Sophia Drossopoulou(Imperial College)
James Noble(Victoria University of Wellington)
Tobias Wrigstad(Stockholm University)


The number of participants is limited to 25. Apart from those with accepted papers, others may attend by sending an email to Tobias Wrigstad (tobias AT indicating what contribution you could make to the workshop. A small number of places will be reserved for PhD students and other researchers wishing to begin research in this area.


Queries may be directed to Tobias Wrigstad (tobias AT