The GemStone object database management system
Communications of the ACM
Subject-oriented programming: a critique of pure objects
OOPSLA '93 Proceedings of the eighth annual conference on Object-oriented programming systems, languages, and applications
A simple and unifying approach to subjective objects
Theory and Practice of Object Systems - Special issue on subjectivity in object-oriented systems
Dynamic class loading in the Java virtual machine
Proceedings of the 13th ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications
Mirrors: design principles for meta-level facilities of object-oriented programming languages
OOPSLA '04 Proceedings of the 19th annual ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications
Language constructs for context-oriented programming: an overview of ContextL
DLS '05 Proceedings of the 2005 symposium on Dynamic languages
The Definitive Guide to the Xen Hypervisor (Prentice Hall Open Source Software Development Series)
The Definitive Guide to the Xen Hypervisor (Prentice Hall Open Source Software Development Series)
Encapsulating and exploiting change with changeboxes
ICDL '07 Proceedings of the 2007 international conference on Dynamic languages: in conjunction with the 15th International Smalltalk Joint Conference 2007
DLS '08 Proceedings of the 2008 symposium on Dynamic languages
Using first-class contexts to realize dynamic software updates
Proceedings of the International Workshop on Smalltalk Technologies
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Long-lived systems rely on reflective self-modification to evolve. Unfortunately, since such a system is at both ends of a causal loop, this means modifications that impact the reflective layer itself can be overly difficult to apply. This paper introduces ObjectSpaces, a reification of the familiar Smalltalk image as a first-class entity. By confining the system inside an ObjectSpace, we isolate the evolution tools from it, while still giving them reflective access to the confined system. We describe the ObjectSpaces idea, the interface to communicate, inspect, and debug objects contained inside and ObjectSpace, based on a prototype implementation in GNU Smalltalk.