[src/trunk]: src/sys/arch/x86/x86 Add more KASSERTs, see if they help PR/53383.

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

details:   https://anonhg.NetBSD.org/src/rev/1b6a801c7a09
branches:  trunk
changeset: 323523:1b6a801c7a09
user:      maxv <maxv%NetBSD.org@localhost>
date:      Mon Jun 18 20:20:27 2018 +0000

description:
Add more KASSERTs, see if they help PR/53383.

diffstat:

 sys/arch/x86/x86/fpu.c |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (43 lines):

diff -r f1f7bee396cc -r 1b6a801c7a09 sys/arch/x86/x86/fpu.c
--- a/sys/arch/x86/x86/fpu.c    Mon Jun 18 18:33:31 2018 +0000
+++ b/sys/arch/x86/x86/fpu.c    Mon Jun 18 20:20:27 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: fpu.c,v 1.37 2018/06/17 06:03:40 maxv Exp $    */
+/*     $NetBSD: fpu.c,v 1.38 2018/06/18 20:20:27 maxv Exp $    */
 
 /*
  * Copyright (c) 2008 The NetBSD Foundation, Inc.  All
@@ -96,7 +96,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: fpu.c,v 1.37 2018/06/17 06:03:40 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fpu.c,v 1.38 2018/06/18 20:20:27 maxv Exp $");
 
 #include "opt_multiprocessor.h"
 
@@ -628,6 +628,7 @@
        fpusave_lwp(l, false);
        fpu_save = process_fpframe(l);
        pcb = lwp_getpcb(l);
+       KASSERT(pcb->pcb_fpcpu == NULL);
 
        if (i386_use_fxsave) {
                memset(&fpu_save->sv_xmm, 0, x86_fpu_save_size);
@@ -654,6 +655,7 @@
         * CPU.
         */
        if (x86_fpu_eager) {
+               KASSERT(l == curlwp);
                fpu_eagerswitch(NULL, l);
        }
 }
@@ -693,6 +695,8 @@
 
        if (extra > 0)
                memcpy(pcb2 + 1, pcb1 + 1, extra);
+
+       KASSERT(pcb2->pcb_fpcpu == NULL);
 }
 
 /* -------------------------------------------------------------------------- */