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Further avoid unnecessary trips through lwp_userret()/issignal().

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This commit is contained in:
ad 2007-02-27 15:19:54 +00:00
parent c574bfa378
commit a76d1d298c
1 changed files with 13 additions and 9 deletions
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22
sys/kern/sys_sig.c
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@ -1,4 +1,4 @@
/* $NetBSD: sys_sig.c,v 1.5 2007/02/22 06:34:45 thorpej Exp $ */
/* $NetBSD: sys_sig.c,v 1.6 2007/02/27 15:19:54 ad Exp $ */
/*-
* Copyright (c) 2006 The NetBSD Foundation, Inc.
@ -73,7 +73,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sys_sig.c,v 1.5 2007/02/22 06:34:45 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: sys_sig.c,v 1.6 2007/02/27 15:19:54 ad Exp $");
#include "opt_ptrace.h"
#include "opt_compat_netbsd.h"
@ -483,9 +483,11 @@ sigaction1(struct lwp *l, int signum, const struct sigaction *nsa,
* Previously held signals may now have become visible. Ensure that
* we check for them before returning to userspace.
*/
lwp_lock(l);
l->l_flag |= LW_PENDSIG;
lwp_unlock(l);
if (sigispending(l, 0)) {
lwp_lock(l);
l->l_flag |= LW_PENDSIG;
lwp_unlock(l);
}
out:
mutex_exit(&p->p_smutex);
mutex_exit(&p->p_mutex);
@ -521,7 +523,7 @@ sigprocmask1(struct lwp *l, int how, const sigset_t *nss, sigset_t *oss)
return (EINVAL);
}
sigminusset(&sigcantmask, &l->l_sigmask);
if (more) {
if (more && sigispending(l, 0)) {
/*
* Check for pending signals on return to user.
*/
@ -568,9 +570,11 @@ sigsuspend1(struct lwp *l, const sigset_t *ss)
sigminusset(&sigcantmask, &l->l_sigmask);
/* Check for pending signals when sleeping. */
lwp_lock(l);
l->l_flag |= LW_PENDSIG;
lwp_unlock(l);
if (sigispending(l, 0)) {
lwp_lock(l);
l->l_flag |= LW_PENDSIG;
lwp_unlock(l);
}
mutex_exit(&p->p_smutex);
}