Module Name: src
Committed By: kamil
Date: Thu Jul 18 20:10:46 UTC 2019
Modified Files:
src/sys/kern: sys_ptrace_common.c
Log Message:
Enhance locking of ptrace_update_lwp
Replace lwp_delref() + mutex_enter() with: mutex_enter() + lwp_delref2().
This avoids extra taking and exiting from a mutex.
Add missing mutex_exit() for LW_SYSTEM.
Do not switch lwp for PT_SET_SIGINFO. This operation is not needed and
avoids panic for >2 LWPs as p_lock is attempted to be entered again in a
critical section.
To generate a diff of this commit:
cvs rdiff -u -r1.57 -r1.58 src/sys/kern/sys_ptrace_common.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
