MFH: r281855-r282312

Sponsored by:	The FreeBSD Foundation

1 files changed, 105 insertions, 0 deletions

diff --git a/tests/sys/vm/mmap_test.c b/tests/sys/vm/mmap_test.c
new file mode 100644
index 0000000..7591a09
--- /dev/null
+++ b/tests/sys/vm/mmap_test.c
@@ -0,0 +1,105 @@
+/*-
+ * Copyright (c) 2009	Simon L. Nielsen <simon@FreeBSD.org>,
+ * 			Bjoern A. Zeeb <bz@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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/sysctl.h>
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+static const struct {
+	void	*addr;
+	int	ok[2];	/* Depending on security.bsd.map_at_zero {0, !=0}. */
+} tests[] = {
+	{ (void *)0,			{ 0, 1 } }, /* Test sysctl. */
+	{ (void *)1,			{ 0, 0 } },
+	{ (void *)(PAGE_SIZE - 1),	{ 0, 0 } },
+	{ (void *)PAGE_SIZE,		{ 1, 1 } },
+	{ (void *)-1,			{ 0, 0 } },
+	{ (void *)(-PAGE_SIZE),		{ 0, 0 } },
+	{ (void *)(-1 - PAGE_SIZE),	{ 0, 0 } },
+	{ (void *)(-1 - PAGE_SIZE - 1),	{ 0, 0 } },
+	{ (void *)(0x1000 * PAGE_SIZE),	{ 1, 1 } },
+};
+
+#define	MAP_AT_ZERO	"security.bsd.map_at_zero"
+
+int
+main(void)
+{
+	void *p;
+	size_t len;
+	int i, error, mib[3], map_at_zero;
+
+	error = 0;
+
+	/* Get the current sysctl value of security.bsd.map_at_zero. */
+	len = sizeof(mib) / sizeof(*mib);
+	if (sysctlnametomib(MAP_AT_ZERO, mib, &len) == -1) {
+		printf("1..0 # SKIP: sysctlnametomib(\"%s\") failed: %s\n",
+		    MAP_AT_ZERO, strerror(errno));
+		return (0);
+	}
+
+	len = sizeof(map_at_zero);
+	if (sysctl(mib, 3, &map_at_zero, &len, NULL, 0) == -1) {
+		printf("1..0 # SKIP: sysctl for %s failed: %s\n", MAP_AT_ZERO,
+		    strerror(errno));
+		return (0);
+	}
+
+	/* Normalize to 0 or 1 for array access. */
+	map_at_zero = !!map_at_zero;
+
+	printf("1..%zu\n", nitems(tests));
+	for (i = 0; i < (int)nitems(tests); i++) {
+		p = mmap((void *)tests[i].addr, PAGE_SIZE,
+		    PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANON | MAP_FIXED,
+		    -1, 0);
+		if (p == MAP_FAILED) {
+			if (tests[i].ok[map_at_zero] != 0)
+				error++;
+			printf("%sok %d # mmap(%p, ...) failed\n",
+			    tests[i].ok[map_at_zero] == 0 ? "" : "not ",
+			    i + 1,
+			    tests[i].addr);
+		} else {
+			if (tests[i].ok[map_at_zero] != 1)
+				error++;
+			printf("%sok %d # mmap(%p, ...) succeeded: p=%p\n",
+			    tests[i].ok[map_at_zero] == 1 ? "" : "not ",
+			    i + 1,
+			    tests[i].addr, p);
+		}
+	}
+
+	return (error != 0);
+}