[src/trunk]: src/sys/kern softint_dispatch(): replace the KASSERT for LW_RUNN...

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

details:   https://anonhg.NetBSD.org/src/rev/b877f7e118b5
branches:  trunk
changeset: 744180:b877f7e118b5
user:      ad <ad%NetBSD.org@localhost>
date:      Sun Jan 26 18:52:55 2020 +0000

description:
softint_dispatch(): replace the KASSERT for LW_RUNNING with a big printf()
plus panic() that dumps lots of info.

diffstat:

 sys/kern/kern_softint.c |  23 ++++++++++++++++++++---
 1 files changed, 20 insertions(+), 3 deletions(-)

diffs (44 lines):

diff -r ca3022b625da -r b877f7e118b5 sys/kern/kern_softint.c
--- a/sys/kern/kern_softint.c   Sun Jan 26 15:52:00 2020 +0000
+++ b/sys/kern/kern_softint.c   Sun Jan 26 18:52:55 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_softint.c,v 1.58 2020/01/25 15:12:47 ad Exp $     */
+/*     $NetBSD: kern_softint.c,v 1.59 2020/01/26 18:52:55 ad Exp $     */
 
 /*-
  * Copyright (c) 2007, 2008, 2019, 2020 The NetBSD Foundation, Inc.
@@ -170,7 +170,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_softint.c,v 1.58 2020/01/25 15:12:47 ad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_softint.c,v 1.59 2020/01/26 18:52:55 ad Exp $");
 
 #include <sys/param.h>
 #include <sys/proc.h>
@@ -841,7 +841,24 @@
        u_int timing;
        lwp_t *l;
 
-       KASSERT((pinned->l_flag & LW_RUNNING) != 0);
+#ifdef DIAGNOSTIC
+       if ((pinned->l_flag & LW_RUNNING) == 0 || curlwp->l_stat != LSIDL) {
+               struct lwp *onproc = curcpu()->ci_onproc;
+               int s2 = splhigh();
+               printf("curcpu=%d, spl=%d curspl=%d\n"
+                       "onproc=%p => l_stat=%d l_flag=%08x l_cpu=%d\n"
+                       "curlwp=%p => l_stat=%d l_flag=%08x l_cpu=%d\n"
+                       "pinned=%p => l_stat=%d l_flag=%08x l_cpu=%d\n",
+                       cpu_index(curcpu()), s, s2, onproc, onproc->l_stat,
+                       onproc->l_flag, cpu_index(onproc->l_cpu), curlwp,
+                       curlwp->l_stat, curlwp->l_flag,
+                       cpu_index(curlwp->l_cpu), pinned, pinned->l_stat,
+                       pinned->l_flag, cpu_index(pinned->l_cpu));
+               splx(s2);
+               panic("softint screwup");
+       }
+#endif
+
        l = curlwp;
        si = l->l_private;