diff options
Diffstat (limited to 'sys/kern/kern_exit.c')
| -rw-r--r-- | sys/kern/kern_exit.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/sys/kern/kern_exit.c b/sys/kern/kern_exit.c index 5785e0b..0738e69 100644 --- a/sys/kern/kern_exit.c +++ b/sys/kern/kern_exit.c @@ -175,7 +175,29 @@ retry: */ } + /* + * Wakeup anyone in procfs' PIOCWAIT. They should have a hold + * on our vmspace, so we should block below until they have + * released their reference to us. Note that if they have + * requested S_EXIT stops we will block here until they ack + * via PIOCCONT. + */ + _STOPEVENT(p, S_EXIT, rv); + + /* + * Note that we are exiting and do another wakeup of anyone in + * PIOCWAIT in case they aren't listening for S_EXIT stops or + * decided to wait again after we told them we are exiting. + */ p->p_flag |= P_WEXIT; + wakeup(&p->p_stype); + + /* + * Wait for any processes that have a hold on our vmspace to + * release their reference. + */ + while (p->p_lock > 0) + msleep(&p->p_lock, &p->p_mtx, PWAIT, "exithold", 0); PROC_LOCK(p->p_pptr); sigqueue_take(p->p_ksi); @@ -209,11 +231,6 @@ retry: mtx_unlock(&ppeers_lock); } - PROC_LOCK(p); - _STOPEVENT(p, S_EXIT, rv); - wakeup(&p->p_stype); /* Wakeup anyone in procfs' PIOCWAIT */ - PROC_UNLOCK(p); - /* * Check if any loadable modules need anything done at process exit. * E.g. SYSV IPC stuff |
