CVSROOT: /cvs
Module name: src
Changes by: v...@cvs.openbsd.org 2020/03/18 09:48:22
Modified files:
sys/kern : kern_exit.c kern_sig.c
sys/sys : proc.h
Log message:
Restart child process scan in dowait4() if single_thread_wait() sleeps.
This ensures that the conditions checked are still in force. The sleep
breaks atomicity, allowing another thread to alter the state.
single_thread_set() should return immediately after sleep when called
from dowait4() because there is no guarantee that the process pr still
exists. When called from single_thread_set(), the process is that of
the calling thread, which prevents process pr from disappearing.
OK anton@, mpi@, claudio@
