UMView, a Userspace Hypervisor Implementation

UMView is a partial virtual machine and userspace hypervisor capable of intercepting system calls and modifying their behavior according to the calling process' view. In order to provide flexibility and modularity UMView supports modules loadable at runtime using a plugin architecture. UMView in particular is the implementation of the View-OS concept which negates the global view assumption which is so radically established in the world of OSes and virtualization.