Restricting type access to high-trust components
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United States of America Patent
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Mar 2, 2010
Grant Date -
May 29, 2008
app pub date -
Dec 7, 2006
filing date -
Nov 28, 2006
priority date (Note) -
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Abstract
Sensitive data structures, such as type data structures, can be used by untrusted application programs without necessarily exposing the sensitive data structures directly. For example, untrusted components, such as application programs that may or may not be type safe, can be allowed to operate in a lower-privilege mode. In addition, the application programs can be associated with an address space with limited permissions (e.g., read-only) to a shared memory heap. Requests by the untrusted components for sensitive data structures can then be handled by trusted components operating in a higher-privilege mode, which may have broader permissions to the shared memory heap. If the requests by the untrusted components are deemed to be valid, the results of the requests can be shared with the lower-privilege mode components through the shared memory heap.
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