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Assigning types to processes
journal contribution
posted on 2023-06-07, 14:10 authored by Nobuko Yoshida, Matthew HennessyIn wide area distributed systems it is now common for higher-order code to be transferred from one domain to another; the receiving host may initialise parameters and then execute the code in its local environment. In this paper we propose a fine-grained typing system for a higher-order p-calculus which can be used to control the effect of such migrating code on local environments. Processes may be assigned different types depending on their intended use. This is in contrast to most of the previous work on typing processes where all processes are typed by a unique constant type, indicating essentially that they are well typed relative to a particular environment. Our fine-grained typing facilitates the management of access rights and provides host protection from potentially malicious behaviour. Our process type takes the form of an interface limiting the resources to which it has access and the types at which they may be used. Allowing resource names to appear both in process types and process terms, as interaction ports, complicates the typing system considerably. For the development of a coherent typing system, we use a kinding technique, similar to that used by the subtyping of the system F, and order-theoretic properties of our subtyping relation. Various examples of this paper illustrate the usage of our fine-grained process types in distributed systems.
History
Publication status
- Published
Journal
Information and ComputationISSN
0890-5401Publisher
IEEE Computer SocietyExternal DOI
Issue
2Volume
174Page range
143-179Pages
334.0ISBN
0769507255Department affiliated with
- Informatics Publications
Notes
Article also presented at Proceedings of the 15th Annual IEEE Symposium on Logic in Computer Science (LICS00)Full text available
- Yes
Peer reviewed?
- Yes