Dynamically determining a buffer-stack overrun

Details Dynamically determining a buffer-stack overrun Dynamically determining a buffer-stack overrun

2005-10-14

2009-12-08

Abraham, Esaw T (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Error/fault detection technique

C714S042000, C714S054000

Reexamination Certificate

active

07631249

ABSTRACT:
Example embodiments provide for effectively executing a stack-walk and other operations by dynamically accessing information about the expected location of cookies on a stack. For example, a first function is executed that causes a stack-walk operation to occur. While performing the stack-walk operation, cookie location information for a cookie placed on the stack by a second function different from the first function is accessed. The cookie, if uncorrupted, includes a known value that is used to determine if the stack has been corrupted. Based on the cookie location information, corrupt data representative of the cookie is accessed. A global cookie, which also includes the known value, is also accessed. The known value of the global cookie is then compared with the corrupt data to determine that the stack is corrupted at least up to the location of the corrupt data representative of the cookie.

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