Dynamic Library Replacement

摘要

Provided are techniques for an OS to be modified on a running system such that running programs, including system services, so not have to be stopped and restarted for the modification to take effect. The techniques include detecting, by a processing thread, when the processing thread has entered a shared library; in response to the detecting, setting a thread flag corresponding to the thread in an operating system (OS); detecting an OS flag, set by the OS, indicating that the OS is updating the shared library; in response to detecting the OS flag, suspending processing by the processing thread and transferring control from the thread to the OS; resuming processing by the processing thread in response to detecting that the OS has completed the updating; and executing the shared library in response to the resuming.

主权项

1. An apparatus, comprising:
a processor; a non-transitory, computer-readable storage medium coupled to the processor; and logic, stored on the computer-readable storage medium and executed on the processor, for:
detecting, by a processing thread, when the processing thread has entered a shared library;setting, in an operating system (OS) and in response to the detecting, a thread flag corresponding to the thread;detecting an OS flag, set by the OS, indicating that the OS is updating the shared library;in response to detecting the OS flag, suspending processing by the processing thread and transferring control from the thread to the OS;resuming processing by the processing thread in response to detecting that the OS has completed the updating; andexecuting the shared library in response to the resuming.