1 files changed, 87 insertions, 0 deletions

diff --git a/tools/test/stress2/misc/shm_super.sh b/tools/test/stress2/misc/shm_super.sh
new file mode 100755
index 000000000000..78f237bf789d
--- /dev/null
+++ b/tools/test/stress2/misc/shm_super.sh
@@ -0,0 +1,87 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2018 Konstantin Belousov <kib@FreeBSD.org>
+#
+# 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 AUTHOR 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 AUTHOR 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.
+#
+
+# Demonstrate superpage mapping.
+
+cat > /tmp/shm_super.c <<EOF
+/* $Id: shm_super.c,v 1.1 2018/10/13 23:49:37 kostik Exp kostik $ */
+
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <err.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define M(x)    ((x) * 1024 * 1024)
+#define SZ      M(4)
+
+int
+main(void)
+{
+        char buf[128];
+        void *ptr;
+        off_t cnt;
+        int error, shmfd;
+
+        shmfd = shm_open(SHM_ANON, O_CREAT | O_RDWR, 0600);
+        if (shmfd == -1)
+                err(1, "shm_open");
+        error = ftruncate(shmfd, SZ);
+        if (error == -1)
+                err(1, "truncate");
+        memset(buf, 0, sizeof(buf));
+        for (cnt = 0; cnt < SZ; cnt += sizeof(buf)) {
+                error = write(shmfd, buf, sizeof(buf));
+                if (error == -1)
+                        err(1, "write");
+                else if (error != sizeof(buf))
+                        errx(1, "short write %d", (int)error);
+        }
+        ptr = mmap(NULL, SZ, PROT_READ | PROT_WRITE, MAP_SHARED |
+            MAP_ALIGNED_SUPER, shmfd, 0);
+        if (ptr == MAP_FAILED)
+                err(1, "mmap");
+        for (cnt = 0; cnt < SZ; cnt += PAGE_SIZE)
+                *((char *)ptr + cnt) = 0;
+        printf("ptr %p\n", ptr);
+        snprintf(buf, sizeof(buf), "procstat -v %d", getpid());
+        system(buf);
+}
+EOF
+cc -o /tmp/shm_super -Wall -Wextra -O2 -g /tmp/shm_super.c || exit 1
+rm /tmp/shm_super.c
+
+/tmp/shm_super > /tmp/shm_super.log 2>&1
+grep -wq S /tmp/shm_super.log && s=0 || { cat /tmp/shm_super.log; s=1; }
+
+rm -f /tmp/shm_super /tmp/shm_super.log
+exit $s