Safe kernel extensions without run-time checking
OSDI '96 Proceedings of the second USENIX symposium on Operating systems design and implementation
Inside COM
The Java programming language (2nd ed.)
The Java programming language (2nd ed.)
Java Virtual Machine Specification
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The Java Language Specification
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Stack-Based Typed Assembly Language
TIC '98 Proceedings of the Second International Workshop on Types in Compilation
The JavaSeal Mobile Agent Kernel
ASAMA '99 Proceedings of the First International Symposium on Agent Systems and Applications Third International Symposium on Mobile Agents
Automated and Portable Native Code Isolation
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Building a Java virtual machine for server applications: the Jvm on 0S/390
IBM Systems Journal
Processes in KaffeOS: isolation, resource management, and sharing in java
OSDI'00 Proceedings of the 4th conference on Symposium on Operating System Design & Implementation - Volume 4
Implementing multiple protection domains in java
ATEC '98 Proceedings of the annual conference on USENIX Annual Technical Conference
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The Multitasking Virtual Machine (called from now on simply MVM) is a modification of the Java芒聞垄 virtual machine. It enables safe, secure, and scalable multitasking. Safety is achieved by strict isolation of applications from one another. Resource control mechanisms augment security by preventing some denial-ofservice attacks. Improved scalability results from an aggressive application of the main design principle of MVM: share as much of the runtime as possible among applications and replicate everything else. The system can be described as a 'no compromise' approach -- all the known APIs and mechanisms of the Java programming language are available to applications. MVM is implemented as a series of carefully tuned modifications to the Java HotSpot芒聞垄 virtual machine, including the dynamic compiler. This paper presents the design of MVM, focusing on several novel and general techniques: an in-runtime design of lightweight isolation, an extension of a copying, generational garbage collector to provide best-effort management of a portion of the heap space, and a transparent and automated mechanism for safe execution of user-level native code. MVM demonstrates that multitasking in a safe language can be accomplished with a high degree of protection, without constraining the language, and with competitive performance characteristics.