Thread operation across virtualization contexts

A computer program product comprising one or more computer-readable storage media having thereon one or more computer-executable instructions that are structured such that, when executed by one or more processors of a computing system, cause the computing system to perform a method for supporting operation of a thread across virtualization contexts, the method comprising:

• while the thread is operating in a first virtualization context, an act of intercepting and redirecting requests from the thread such that the thread accesses first computing resources associated with the first virtualization context;
• an act of detecting that the thread encounters an entry point to code operating in a second virtualization context;
• and
• while the thread is operating in the second virtualization context, an act of intercepting and redirecting requests from the thread such that the thread accesses second computing resources associated with the second virtualization context.

A computing system comprising:

• a first virtualization context comprising first computing resources;
• a second virtualization context comprising second computing resources virtual resources;
• a virtualization facilitation component that intercepts function calls from one or more threads operating in either or both of the first and second virtualization contexts, and redirects the function calls to the first and second computing resources, respectively;
• and
• a thread transition component configured to change a virtualization context of the thread when the thread enters an entry point for code operating in a different virtualization context.