Selectively switching memory access permission for manipulating

Details Selectively switching memory access permission for manipulating Selectively switching memory access permission for manipulating

1997-04-11

1999-04-20

Amsbury, Wayne

Data processing: database and file management or data structures

Database design

Data structure types

707 1, 707 2, 707 8, 707 10, 707103, G06F 1730

Patent

active

058954678

ABSTRACT:
Routines for manipulating data in a database are performed by a database server by determining whether or not a database manipulation routine is to be isolated from a specified range of memory, and, in response, selectively switching memory access permission to the specified range of memory (e.g., from read/write to read-only) for the database manipulation routine under consideration. The database manipulation routine is then executed using the selectively switched memory access permission. A database manipulation routine that is to be isolated can be executed with read-only memory access thereby protecting the specified range of memory (e.g., corresponding to core data structures) from improper modification.

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Bach, M.J. The Design of the UNIX Operating System, New Jersey: Prentice Hall, 1986, pp. 165-170, 181.

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