[src/trunk]: src/tests/lib/libc/sys Add a test to verify syscall() and/or __s...

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

details:   https://anonhg.NetBSD.org/src/rev/3a8b0b3a0e8a
branches:  trunk
changeset: 362064:3a8b0b3a0e8a
user:      martin <martin%NetBSD.org@localhost>
date:      Fri May 25 15:42:30 2018 +0000

description:
Add a test to verify syscall() and/or __syscall() are working.
This used to trigger a panic (see PR kern/53261) on arm.

diffstat:

 tests/lib/libc/sys/Makefile    |    3 +-
 tests/lib/libc/sys/t_syscall.c |  117 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 119 insertions(+), 1 deletions(-)

diffs (138 lines):

diff -r 9c0f0f481dc8 -r 3a8b0b3a0e8a tests/lib/libc/sys/Makefile
--- a/tests/lib/libc/sys/Makefile       Fri May 25 15:37:57 2018 +0000
+++ b/tests/lib/libc/sys/Makefile       Fri May 25 15:42:30 2018 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.51 2018/05/18 06:39:58 kamil Exp $
+# $NetBSD: Makefile,v 1.52 2018/05/25 15:42:30 martin Exp $
 
 MKMAN= no
 
@@ -70,6 +70,7 @@
 TESTS_C+=              t_socketpair
 TESTS_C+=              t_swapcontext
 TESTS_C+=              t_stat
+TESTS_C+=              t_syscall
 TESTS_C+=              t_timer_create
 TESTS_C+=              t_truncate
 TESTS_C+=              t_ucontext
diff -r 9c0f0f481dc8 -r 3a8b0b3a0e8a tests/lib/libc/sys/t_syscall.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/lib/libc/sys/t_syscall.c    Fri May 25 15:42:30 2018 +0000
@@ -0,0 +1,117 @@
+/*     $NetBSD: t_syscall.c,v 1.1 2018/05/25 15:42:30 martin Exp $     */
+
+/*-
+ * Copyright (c) 2018 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Martin Husemann.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: t_syscall.c,v 1.1 2018/05/25 15:42:30 martin Exp $");
+
+
+#include <atf-c.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <err.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <sys/endian.h>
+#include <sys/syscall.h>
+
+#if !defined(_LP64) && BYTE_ORDER == _BIG_ENDIAN
+#define __SYSCALL_TO_UINPTRT(V)        ((uintptr_t)((V)>>32))
+#else
+#define __SYSCALL_TO_UINPTRT(V)        ((uintptr_t)(V))
+#endif
+
+static const char secrect_data[1024] = {
+       "my secret key\n"
+};
+
+#define        FILE_NAME       "dummy"
+
+#ifndef _LP64
+ATF_TC(mmap_syscall);
+
+ATF_TC_HEAD(mmap_syscall, tc)
+{
+       atf_tc_set_md_var(tc, "descr", "Tests mmap(2) via syscall(2)");
+}
+
+ATF_TC_BODY(mmap_syscall, tc)
+{
+       int fd;
+       const char *p;
+
+       fd = open(FILE_NAME, O_RDWR|O_CREAT|O_TRUNC, 0666);
+       ATF_REQUIRE(fd != -1);
+
+       write(fd, secrect_data, sizeof(secrect_data));
+
+       p = (const char *)syscall(SYS_mmap,
+               0, sizeof(secrect_data), PROT_READ, MAP_PRIVATE, fd, 0, 0, 0);
+       ATF_REQUIRE(p != NULL);
+
+       ATF_REQUIRE(strcmp(p, secrect_data) == 0);
+}
+#endif
+
+ATF_TC(mmap___syscall);
+
+ATF_TC_HEAD(mmap___syscall, tc)
+{
+       atf_tc_set_md_var(tc, "descr", "Tests mmap(2) via __syscall(2)");
+}
+
+ATF_TC_BODY(mmap___syscall, tc)
+{
+       int fd;
+       const char *p;
+
+       fd = open(FILE_NAME, O_RDWR|O_CREAT|O_TRUNC, 0666);
+       ATF_REQUIRE(fd != -1);
+
+       write(fd, secrect_data, sizeof(secrect_data));
+
+       p = (const char *)__SYSCALL_TO_UINPTRT(__syscall(SYS_mmap,
+               0, sizeof(secrect_data), PROT_READ, MAP_PRIVATE, fd, 0, 0, 0));
+       ATF_REQUIRE(p != NULL);
+
+       ATF_REQUIRE(strcmp(p, secrect_data) == 0);
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+#ifndef _LP64
+       ATF_TP_ADD_TC(tp, mmap_syscall);
+#endif
+       ATF_TP_ADD_TC(tp, mmap___syscall);
+
+       return atf_no_error();
+}