The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 2013
Filed:
Mar. 28, 2008
Periklis Akritidis, Cambridge, GB;
Manuel Costa, Cambridge, GB;
Miguel Castro, Cambridge, GB;
Microsoft Corporation, Redmond, WA (US);
Abstract
Methods of detecting memory errors using write integrity testing are described. In an embodiment, additional analysis is performed when a program is compiled. This analysis identifies a set of objects which can be written by each instruction in the program. Additional code is then inserted into the program so that, at runtime, the program checks before performing a write instruction that the particular object being written is one of the set of objects that it is allowed to write. The inserted code causes an exception to be raised if this check fails and allows the write to proceed if the check is successful. In a further embodiment, code may also be inserted to perform checks before indirect control-flow transfer instructions, to ensure that those instructions cannot transfer control to locations different from those intended.