1 files changed, 203 insertions, 0 deletions

diff --git a/src/regress/lib/libc/sys/t_minherit.c b/src/regress/lib/libc/sys/t_minherit.c
new file mode 100644
index 0000000000..dd9ddf1d1e
--- /dev/null
+++ b/src/regress/lib/libc/sys/t_minherit.c
@@ -0,0 +1,203 @@
+/*      $OpenBSD: t_minherit.c,v 1.1 2021/09/02 12:40:44 mbuhl Exp $    */
+/* $NetBSD: t_minherit.c,v 1.1 2014/07/18 12:34:52 christos Exp $ */
+
+/*-
+ * Copyright (c) 2014 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Christos Zoulas
+ *
+ * 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 "macros.h"
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: t_minherit.c,v 1.1 2014/07/18 12:34:52 christos Exp $");
+
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/sysctl.h>
+#include <sys/wait.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "atf-c.h"
+
+static long page;
+
+static void *
+makemap(int v, int f) {
+        void *map = mmap(NULL, page, PROT_READ|PROT_WRITE,
+            MAP_SHARED|MAP_ANON, -1, 0);
+        ATF_REQUIRE(map != MAP_FAILED);
+        memset(map, v, page);
+        if (f != 666)
+                ATF_REQUIRE(minherit(map, page, f) == 0);
+        else
+                ATF_REQUIRE(minherit(map, page, f) == -1);
+        return map;
+}
+
+ATF_TC(minherit_copy);
+ATF_TC_HEAD(minherit_copy, tc)
+{
+        atf_tc_set_md_var(tc, "descr",
+            "Test for MAP_INHERIT_COPY from minherit(2)");
+}
+
+ATF_TC_BODY(minherit_copy, tc)
+{
+        void *map1 = makemap(1, MAP_INHERIT_COPY);
+        void *map2 = makemap(1, MAP_INHERIT_COPY);
+        switch (fork()) {
+        default:
+                ATF_REQUIRE(wait(NULL) != -1);
+                ATF_REQUIRE(memcmp(map1, map2, page) == 0);
+                break;
+        case -1:
+                ATF_REQUIRE(0);
+                break;
+        case 0:
+                ATF_REQUIRE(memcmp(map1, map2, page) == 0);
+                memset(map1, 0, page);
+                exit(0);
+        }
+}
+
+ATF_TC(minherit_share);
+ATF_TC_HEAD(minherit_share, tc)
+{
+        atf_tc_set_md_var(tc, "descr",
+            "Test for MAP_INHERIT_SHARE from minherit(2)");
+}
+
+ATF_TC_BODY(minherit_share, tc)
+{
+        void *map1 = makemap(1, MAP_INHERIT_SHARE);
+        void *map2 = makemap(1, MAP_INHERIT_SHARE);
+
+        switch (fork()) {
+        default:
+                ATF_REQUIRE(wait(NULL) != -1);
+                memset(map2, 0, page);
+                ATF_REQUIRE(memcmp(map1, map2, page) == 0);
+                break;
+        case -1:
+                ATF_REQUIRE(0);
+                break;
+        case 0:
+                ATF_REQUIRE(memcmp(map1, map2, page) == 0);
+                memset(map1, 0, page);
+                exit(0);
+        }
+}
+
+static void
+segv(int n) {
+        _exit(n);
+}
+
+ATF_TC(minherit_none);
+ATF_TC_HEAD(minherit_none, tc)
+{
+        atf_tc_set_md_var(tc, "descr",
+            "Test for MAP_INHERIT_NONE from minherit(2)");
+}
+
+ATF_TC_BODY(minherit_none, tc)
+{
+        void *map1 = makemap(0, MAP_INHERIT_NONE);
+        int status;
+
+        switch (fork()) {
+        default:
+                ATF_REQUIRE(wait(&status) != -1);
+                ATF_REQUIRE(WEXITSTATUS(status) == SIGSEGV);
+                break;
+        case -1:
+                ATF_REQUIRE(0);
+                break;
+        case 0:
+                ATF_REQUIRE(signal(SIGSEGV, segv) != SIG_ERR);
+                memset(map1, 0, page);
+                exit(0);
+        }
+}
+
+ATF_TC(minherit_zero);
+ATF_TC_HEAD(minherit_zero, tc)
+{
+        atf_tc_set_md_var(tc, "descr",
+            "Test for MAP_INHERIT_ZERO from minherit(2)");
+}
+
+ATF_TC_BODY(minherit_zero, tc)
+{
+        void *map1 = makemap(1, MAP_INHERIT_ZERO);
+        void *map2 = makemap(0, MAP_INHERIT_SHARE);
+
+        switch (fork()) {
+        default:
+                ATF_REQUIRE(wait(NULL) != -1);
+                memset(map2, 1, page);
+                ATF_REQUIRE(memcmp(map1, map2, page) == 0);
+                break;
+        case -1:
+                ATF_REQUIRE(0);
+                break;
+        case 0:
+                ATF_REQUIRE(memcmp(map1, map2, page) == 0);
+                memset(map1, 2, page);
+                exit(0);
+        }
+}
+
+ATF_TC(minherit_bad);
+ATF_TC_HEAD(minherit_bad, tc)
+{
+        atf_tc_set_md_var(tc, "descr",
+            "Test for bad minherit(2)");
+}
+
+ATF_TC_BODY(minherit_bad, tc)
+{
+        (void)makemap(0, 666);
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+        page = sysconf(_SC_PAGESIZE);
+        ATF_REQUIRE(page >= 0);
+
+        ATF_TP_ADD_TC(tp, minherit_copy);
+        ATF_TP_ADD_TC(tp, minherit_share);
+        ATF_TP_ADD_TC(tp, minherit_none);
+        ATF_TP_ADD_TC(tp, minherit_zero);
+        ATF_TP_ADD_TC(tp, minherit_bad);
+
+        return atf_no_error();
+}