[src/trunk]: src/sys/kern Call MD code in mi_startlwp() before MI check for d...

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

details:   https://anonhg.NetBSD.org/src/rev/e481611aa952
branches:  trunk
changeset: 450979:e481611aa952
user:      kamil <kamil%NetBSD.org@localhost>
date:      Wed May 01 22:55:55 2019 +0000

description:
Call MD code in mi_startlwp() before MI check for debugger

This allows to get initialized mcontext.

diffstat:

 sys/kern/sys_lwp.c |  11 +++++------
 1 files changed, 5 insertions(+), 6 deletions(-)

diffs (46 lines):

diff -r 3046b001306c -r e481611aa952 sys/kern/sys_lwp.c
--- a/sys/kern/sys_lwp.c        Wed May 01 21:59:32 2019 +0000
+++ b/sys/kern/sys_lwp.c        Wed May 01 22:55:55 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: sys_lwp.c,v 1.64 2019/05/01 21:57:34 kamil Exp $       */
+/*     $NetBSD: sys_lwp.c,v 1.65 2019/05/01 22:55:55 kamil Exp $       */
 
 /*-
  * Copyright (c) 2001, 2006, 2007, 2008 The NetBSD Foundation, Inc.
@@ -35,7 +35,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sys_lwp.c,v 1.64 2019/05/01 21:57:34 kamil Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sys_lwp.c,v 1.65 2019/05/01 22:55:55 kamil Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -75,6 +75,8 @@
        struct lwp *l = curlwp;
        struct proc *p = l->l_proc;
 
+       (p->p_emul->e_startlwp)(arg);
+
        /* If the process is traced, report lwp creation to a debugger */
        if ((p->p_slflag & (PSL_TRACED|PSL_TRACELWP_CREATE|PSL_SYSCALL)) ==
            (PSL_TRACED|PSL_TRACELWP_CREATE)) {
@@ -83,7 +85,7 @@
                if ((p->p_slflag & (PSL_TRACED|PSL_TRACELWP_CREATE|PSL_SYSCALL)) !=
                    (PSL_TRACED|PSL_TRACELWP_CREATE)) {
                        mutex_exit(proc_lock);
-                       goto my_tracer_is_gone;
+                       return;
                }
 
                mutex_enter(p->p_lock);
@@ -92,9 +94,6 @@
                // XXX ktrpoint(KTR_PSIG)
                mutex_exit(p->p_lock);
        }
-
-my_tracer_is_gone:
-       (p->p_emul->e_startlwp)(arg);
 }
 
 int