User-level re-initialization instruction interception

摘要

A data processing system comprising an operating system for supporting processes, such that the process are associated with one or more resources and the operating system being arranged to police the accessing by processes of resources so as to inhibit a process from accessing resources with which it is not associated. Part of this system is an interface for interfacing between each process and the operating system and a memory for storing state information for at least one process. The interface may be arranged to analyze instructions from the processes to the operating system, and upon detecting an instruction to re-initialize a process cause state information corresponding to that pre-existing state information to be stored in the memory as state information for the re-initialized process and to be associated with the resource.

主权项

1. A data processing system comprising:
an operating system for supporting processes, each process being associated with one or more resources each identifiable by a file descriptor, the operating system being arranged to police the accessing by processes of resources so as to inhibit a process from accessing resources with which it is not associated, and being responsive to instructions of a certain type to reinitialize a process; a user-level library for interfacing between each process and the operating system; and a memory shared between the operating system and the user-level library for storing state information for at least one process, the state information being associated with a resource; wherein the user-level library is arranged to analyze instructions from the processes to the operating system, and is arranged to, on detecting an instruction to re-initialize a process associated with a resource that is managed by the user-level library, check whether it has a record of there having been an instruction to reinitialize the process, and cause state information equivalent to the pre-existing state information associated with said resource to be stored in the memory as state information for the re-initialized process and to be associated with the resource.