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kpsignal2: enqueue SA_STOP signals and let issignal handle it rather 

than trying to stop the process by ourselves.  this fixes SIGTSTP masking.
ok'ed by Andrew Doran.  PR/37603, PR/38060.
This commit is contained in:
yamt 2008-03-08 07:56:53 +00:00
parent 64708da5c1
commit 60381203e0
1 changed files with 3 additions and 19 deletions
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22
sys/kern/kern_sig.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_sig.c,v 1.272 2008/02/20 11:48:46 yamt Exp $ */
/* $NetBSD: kern_sig.c,v 1.273 2008/03/08 07:56:53 yamt Exp $ */
/*-
* Copyright (c) 2006, 2007 The NetBSD Foundation, Inc.
@ -73,7 +73,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_sig.c,v 1.272 2008/02/20 11:48:46 yamt Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_sig.c,v 1.273 2008/03/08 07:56:53 yamt Exp $");
#include "opt_ptrace.h"
#include "opt_multiprocessor.h"
@ -1352,23 +1352,7 @@ kpsignal2(struct proc *p, ksiginfo_t *ksi)
if ((prop & SA_CONT) != 0 && action == SIG_DFL)
goto out;
if ((prop & SA_STOP) != 0 && action == SIG_DFL) {
/*
* If a child holding parent blocked, stopping could
* cause deadlock: discard the signal.
*/
if ((p->p_sflag & PS_PPWAIT) == 0) {
p->p_xstat = signo;
proc_stop(p, 1, signo);
}
goto out;
} else {
/*
* Stop signals with the default action are handled
* specially in issignal(), and so are not enqueued.
*/
sigput(&p->p_sigpend, p, kp);
}
sigput(&p->p_sigpend, p, kp);
} else {
/*
* Process is stopped or stopping. If traced, then no