d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Temporarily back out kern_sig.c rev 1.125 and kern_exit.c rev 1.131.

Browse Source 
This paniced my one of my machines one time too many :-( and there is
no sign of a solution in the pipeline.  The deltas are still easily
available in cvs.  The problem is that if the parent has been swapped
out, the child process cannot grope around in the parent's UPAGES to
see the sigact[] array or it will fault.  This probably is a showstopper
for this implementation anyway.
This commit is contained in:
peter 2001-08-01 20:35:24 +00:00
parent 95023d1052
commit 9f38eeae58
2 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
sys/kern/kern_exit.c
View File

@ -329,11 +329,10 @@ exit1(p, rv)
/*
* Notify parent that we're gone. If parent has the PS_NOCLDWAIT
* flag set, or if the handler is set to SIG_IGN, notify process
* 1 instead (and hope it will handle this situation).
* flag set, notify process 1 instead (and hope it will handle
* this situation).
*/
if ((p->p_pptr->p_procsig->ps_flag & PS_NOCLDWAIT)
|| p->p_pptr->p_sigacts->ps_sigact[_SIG_IDX(SIGCHLD)] == SIG_IGN) {
if (p->p_pptr->p_procsig->ps_flag & PS_NOCLDWAIT) {
struct proc *pp = p->p_pptr;
proc_reparent(p, initproc);
/*

9
sys/kern/kern_sig.c
View File

@ -255,11 +255,11 @@ do_sigaction(p, sig, act, oact, old)
ps->ps_catchmask[_SIG_IDX(sig)] = act->sa_mask;
SIG_CANTMASK(ps->ps_catchmask[_SIG_IDX(sig)]);
if (act->sa_flags & SA_SIGINFO) {
ps->ps_sigact[_SIG_IDX(sig)] =
(__sighandler_t *)act->sa_sigaction;
ps->ps_sigact[_SIG_IDX(sig)] = act->sa_handler;
SIGADDSET(ps->ps_siginfo, sig);
} else {
ps->ps_sigact[_SIG_IDX(sig)] = act->sa_handler;
ps->ps_sigact[_SIG_IDX(sig)] =
(__sighandler_t *)act->sa_sigaction;
SIGDELSET(ps->ps_siginfo, sig);
}
if (!(act->sa_flags & SA_RESTART))
@ -289,7 +289,8 @@ do_sigaction(p, sig, act, oact, old)
p->p_procsig->ps_flag |= PS_NOCLDSTOP;
else
p->p_procsig->ps_flag &= ~PS_NOCLDSTOP;
if (act->sa_flags & SA_NOCLDWAIT) {
if ((act->sa_flags & SA_NOCLDWAIT) ||
ps->ps_sigact[_SIG_IDX(SIGCHLD)] == SIG_IGN) {
/*
* Paranoia: since SA_NOCLDWAIT is implemented
* by reparenting the dying child to PID 1 (and