Module Name: src
Committed By: kamil
Date: Sun Apr 7 14:50:41 UTC 2019
Modified Files:
src/sys/kern: kern_fork.c
Log Message:
Add a paranoid racy lock check in child_return()
In theory a child could be detached for some reason or another during
the time window between checking for PSL_TRACED and acquiring proc_lock.
Acquire the proc_lock mutex and recheck for PSL_TRACED before emitting
SIGTRAP. sigswitch() must acquite it internally anyway so this does not
have a negative impact and adds an extra sanity check.
For !PSL_TRACED case there is no impact.
To generate a diff of this commit:
cvs rdiff -u -r1.208 -r1.209 src/sys/kern/kern_fork.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
