Early detection of an access to de-allocated memory
US8151086B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2008 |
| Grant date | Apr 3, 2012 |
| Priority date | — |
| Expiry date | Dec 25, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/1483
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method of detecting an access to de-allocated memory, comprising: creating a pool of fixed size memory blocks that are a non-zero integer multiple of a page size of a processor; receiving a request for an allocation of a block of memory; recording a set of allocation context information in a fixed size memory block; returning a pointer to an allocation of memory within said fixed size memory block; receiving a request to de-allocate said block of memory; recording a set of de-allocation context information in said fixed size memory block; and, setting an indicator in a page table entry associated with said fixed size memory block to a first value that indicates access to said fixed size memory block is not allowed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.