[src/trunk]: src/sys/kern Remove support for early SIGTRAP (fork related) sig...

[kamil <kamil%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/738917ce269b
branches:  trunk
changeset: 997947:738917ce269b
user:      kamil <kamil%NetBSD.org@localhost>
date:      Wed Apr 03 08:34:33 2019 +0000

description:
Remove support for early SIGTRAP (fork related) signals in kpsignal2()

This function is no longer used to handle early SIGTRAP signals for
fork-related events for ptrace(2).

diffstat:

 sys/kern/kern_sig.c |  21 +++++----------------
 1 files changed, 5 insertions(+), 16 deletions(-)

diffs (57 lines):

diff -r c04f4d9d922a -r 738917ce269b sys/kern/kern_sig.c
--- a/sys/kern/kern_sig.c       Wed Apr 03 08:31:57 2019 +0000
+++ b/sys/kern/kern_sig.c       Wed Apr 03 08:34:33 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_sig.c,v 1.351 2019/03/08 23:32:30 kamil Exp $     */
+/*     $NetBSD: kern_sig.c,v 1.352 2019/04/03 08:34:33 kamil Exp $     */
 
 /*-
  * Copyright (c) 2006, 2007, 2008 The NetBSD Foundation, Inc.
@@ -70,7 +70,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_sig.c,v 1.351 2019/03/08 23:32:30 kamil Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_sig.c,v 1.352 2019/04/03 08:34:33 kamil Exp $");
 
 #include "opt_ptrace.h"
 #include "opt_dtrace.h"
@@ -1260,7 +1260,7 @@
        ksiginfo_t *kp;
        lwpid_t lid;
        sig_t action;
-       bool toall, debtrap = false;
+       bool toall;
        int error = 0;
 
        KASSERT(!cpu_intr_p());
@@ -1273,13 +1273,8 @@
         * If the process is being created by fork, is a zombie or is
         * exiting, then just drop the signal here and bail out.
         */
-       if (p->p_stat == SIDL && signo == SIGTRAP
-           && (p->p_slflag & PSL_TRACED)) {
-               /* allow an initial SIGTRAP for traced processes */
-               debtrap = true;
-       } else if (p->p_stat != SACTIVE && p->p_stat != SSTOP) {
+       if (p->p_stat != SACTIVE && p->p_stat != SSTOP)
                return 0;
-       }
 
        /* XXX for core dump/debugger */
        p->p_sigctx.ps_lwp = ksi->ksi_lid;
@@ -1380,13 +1375,7 @@
         * the signal to it.
         */
        if (lid != 0) {
-               if (__predict_false(debtrap)) {
-                       l = LIST_FIRST(&p->p_lwps);
-                       if (l->l_lid != lid)
-                               l = NULL;
-               } else {
-                       l = lwp_find(p, lid);
-               }
+               l = lwp_find(p, lid);
                if (l != NULL) {
                        if ((error = sigput(&l->l_sigpend, p, kp)) != 0)
                                goto out;