[src/trunk]: src/tests/lib/libexecinfo t_sig_backtrace: Pacify vfork clobber ...

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

details:   https://anonhg.NetBSD.org/src/rev/fa29755715fe
branches:  trunk
changeset: 368667:fa29755715fe
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Mon Jul 25 22:43:01 2022 +0000

description:
t_sig_backtrace: Pacify vfork clobber warning with volatile.

diffstat:

 tests/lib/libexecinfo/t_sig_backtrace.c |  12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)

diffs (42 lines):

diff -r 9cc3e498b686 -r fa29755715fe tests/lib/libexecinfo/t_sig_backtrace.c
--- a/tests/lib/libexecinfo/t_sig_backtrace.c   Mon Jul 25 22:37:37 2022 +0000
+++ b/tests/lib/libexecinfo/t_sig_backtrace.c   Mon Jul 25 22:43:01 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: t_sig_backtrace.c,v 1.5 2022/07/25 22:37:37 riastradh Exp $    */
+/*     $NetBSD: t_sig_backtrace.c,v 1.6 2022/07/25 22:43:01 riastradh Exp $    */
 
 /*-
  * Copyright (c) 2021 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: t_sig_backtrace.c,v 1.5 2022/07/25 22:37:37 riastradh Exp $");
+__RCSID("$NetBSD: t_sig_backtrace.c,v 1.6 2022/07/25 22:43:01 riastradh Exp $");
 
 #include <sys/mman.h>
 #include <execinfo.h>
@@ -83,8 +83,10 @@
 }
 
 static int __noinline
-the_loop_deref(int i)
+the_loop_deref(int i0)
 {
+       volatile int i = i0;
+
        while (*foo != 0) {
                i = func3(i);
                i = func1(i);
@@ -100,8 +102,10 @@
 }
 
 static int __noinline
-the_loop_jump(int i)
+the_loop_jump(int i0)
 {
+       volatile int i = i0;
+
        while ((*bar)() != 0) {
                i = func3(i);
                i = func1(i);