Protection domains for processes in shared address space
US11144347B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2019 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Nov 14, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/657
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods, systems and computer program products provide protection domains for processes in shared address space. Multiple processes may share address space, for example, in a software isolated process running on top of a library operating system (OS). A protection domain (PD), such as a Protection Key (PKEY), may be assigned to a process to protect its allocated address spaces from access by other processes. PDs may be acquired from a host OS. A library OS may manage PDs to protect processes and/or data. A PD may be freed and reassigned to a different process or may be concurrently assigned to multiple processes, for example, when the number of processes exceeds the number of protection domains. Threads spawned by a process may inherit protection provided by a PD assigned to the process. Process PDs may be disassociated with address spaces as they are deallocated for a process or its threads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.