Using registers to optimize cross-domain call performance
ASPLOS III Proceedings of the third international conference on Architectural support for programming languages and operating systems
A Retrospective on the VAX VMM Security Kernel
IEEE Transactions on Software Engineering
The file system of an integrated local network
CSC '85 Proceedings of the 1985 ACM thirteenth annual conference on Computer Science
The structuring of systems using upcalls
Proceedings of the tenth ACM symposium on Operating systems principles
A technique for the architectural implementation of software subsystems
ISCA '80 Proceedings of the 7th annual symposium on Computer Architecture
Designing software for ease of extension and contraction
ICSE '78 Proceedings of the 3rd international conference on Software engineering
Using type-extension to organize virtual-memory mechanisms
ACM SIGOPS Operating Systems Review
VM/370 security retrofit program
ACM '77 Proceedings of the 1977 annual conference
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Much effort is currently being devoted to producing systems that are easy to understand, to verify and to develop. The general methodology for designing such a system consists of decomposing it into a structured set of modules so that the modules can be understood, verified and developed individually, and so that the understanding/verification of the system can be derived from the understanding/verification of its modules. While many of the mechanisms in a computer system have been decomposed successfully into a structured set of modules, no technique has been proposed to organize the virtual memory mechanism of a system in such a way. The present thesis proposes to use type extension for that purpose. The virtual memory mechanism consists of a set of type manager modules implementing abstract information containers. The structure of the mechanism reflects the structure of the containers that are implemented. While using type extension to organize a virtual memory mechanism is conceptually simple, it is hard to achieve in practice. All existing or proposed uses type extension assume the existence of information containers that are uniformly accessible, can always be grown and are protected. Using type extension inside a virtual memory mechanism raises implementation problems since such containers are not implemented. Their implementation is precisely the objective of the virtual memory mechanism. In addition to explaining how type extension can be supported inside a virtual memory mechanism, the thesis demonstrates its use in a case study involving a commercial, general-purpose, time-sharing system. It concludes by providing some insights into the organization of virtual memory mechanisms for time-sharing systems.