1 files changed, 286 insertions, 0 deletions
diff --git a/contrib/netbsd-tests/lib/libc/sys/t_mlock.c b/contrib/netbsd-tests/lib/libc/sys/t_mlock.c
new file mode 100644
index 0000000..0397b5c
--- /dev/null
+++ b/contrib/netbsd-tests/lib/libc/sys/t_mlock.c
@@ -0,0 +1,286 @@
+/* $NetBSD: t_mlock.c,v 1.5 2014/02/26 20:49:26 martin Exp $ */
+
+/*-
+ * Copyright (c) 2012 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jukka Ruohonen.
+ *
+ * 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_mlock.c,v 1.5 2014/02/26 20:49:26 martin Exp $");
+
+#ifdef __FreeBSD__
+#include <sys/types.h>
+#endif
+#include <sys/mman.h>
+#include <sys/resource.h>
+#include <sys/sysctl.h>
+#include <sys/wait.h>
+
+#include <errno.h>
+#include <atf-c.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#ifdef __FreeBSD__
+#define _KMEMUSER
+#include <machine/vmparam.h>
+#endif
+
+static long page = 0;
+
+ATF_TC(mlock_clip);
+ATF_TC_HEAD(mlock_clip, tc)
+{
+	atf_tc_set_md_var(tc, "descr", "Test with mlock(2) that UVM only "
+	    "clips if the clip address is within the entry (PR kern/44788)");
+}
+
+ATF_TC_BODY(mlock_clip, tc)
+{
+	void *buf;
+
+	buf = malloc(page);
+	ATF_REQUIRE(buf != NULL);
+
+	if (page < 1024)
+		atf_tc_skip("page size too small");
+
+	for (size_t i = page; i >= 1; i = i - 1024) {
+		(void)mlock(buf, page - i);
+		(void)munlock(buf, page - i);
+	}
+
+	free(buf);
+}
+
+ATF_TC(mlock_err);
+ATF_TC_HEAD(mlock_err, tc)
+{
+	atf_tc_set_md_var(tc, "descr",
+	    "Test error conditions in mlock(2) and munlock(2)");
+}
+
+ATF_TC_BODY(mlock_err, tc)
+{
+#ifdef __NetBSD__
+	unsigned long vmin = 0;
+	size_t len = sizeof(vmin);
+#endif
+	void *invalid_ptr;
+	int null_errno = ENOMEM;	/* error expected for NULL */
+
+#ifdef __FreeBSD__
+#ifdef VM_MIN_ADDRESS
+	if ((uintptr_t)VM_MIN_ADDRESS > 0)
+		null_errno = EINVAL;	/* NULL is not inside user VM */
+#endif
+#else
+	if (sysctlbyname("vm.minaddress", &vmin, &len, NULL, 0) != 0)
+		atf_tc_fail("failed to read vm.minaddress");
+
+	if (vmin > 0)
+		null_errno = EINVAL;	/* NULL is not inside user VM */
+#endif
+
+	errno = 0;
+	ATF_REQUIRE_ERRNO(null_errno, mlock(NULL, page) == -1);
+
+	errno = 0;
+	ATF_REQUIRE_ERRNO(null_errno, mlock((char *)0, page) == -1);
+
+	errno = 0;
+	ATF_REQUIRE_ERRNO(EINVAL, mlock((char *)-1, page) == -1);
+
+	errno = 0;
+	ATF_REQUIRE_ERRNO(null_errno, munlock(NULL, page) == -1);
+
+	errno = 0;
+	ATF_REQUIRE_ERRNO(null_errno, munlock((char *)0, page) == -1);
+
+	errno = 0;
+	ATF_REQUIRE_ERRNO(EINVAL, munlock((char *)-1, page) == -1);
+
+	/*
+	 * Try to create a pointer to an unmapped page - first after current
+	 * brk will likely do.
+	 */
+	invalid_ptr = (void*)(((uintptr_t)sbrk(0)+page) & ~(page-1));
+	printf("testing with (hopefully) invalid pointer %p\n", invalid_ptr);
+
+	errno = 0;
+	ATF_REQUIRE_ERRNO(ENOMEM, mlock(invalid_ptr, page) == -1);
+
+	errno = 0;
+	ATF_REQUIRE_ERRNO(ENOMEM, munlock(invalid_ptr, page) == -1);
+}
+
+ATF_TC(mlock_limits);
+ATF_TC_HEAD(mlock_limits, tc)
+{
+	atf_tc_set_md_var(tc, "descr", "Test system limits with mlock(2)");
+}
+
+ATF_TC_BODY(mlock_limits, tc)
+{
+	struct rlimit res;
+	void *buf;
+	pid_t pid;
+	int sta;
+
+	buf = malloc(page);
+	ATF_REQUIRE(buf != NULL);
+
+	pid = fork();
+	ATF_REQUIRE(pid >= 0);
+
+	if (pid == 0) {
+
+		for (ssize_t i = page; i >= 2; i -= 100) {
+
+			res.rlim_cur = i - 1;
+			res.rlim_max = i - 1;
+
+			(void)fprintf(stderr, "trying to lock %zd bytes "
+			    "with %zu byte limit\n", i, (size_t)res.rlim_cur);
+
+			if (setrlimit(RLIMIT_MEMLOCK, &res) != 0)
+				_exit(EXIT_FAILURE);
+
+			errno = 0;
+
+#ifdef __FreeBSD__
+			/*
+			 * NetBSD doesn't conform to POSIX with ENOMEM requirement;
+			 * FreeBSD does.
+			 *
+			 * See: NetBSD PR # kern/48962 for more details.
+			 */
+			if (mlock(buf, i) != -1 || errno != ENOMEM) {
+#else
+			if (mlock(buf, i) != -1 || errno != EAGAIN) {
+#endif
+				(void)munlock(buf, i);
+				_exit(EXIT_FAILURE);
+			}
+		}
+
+		_exit(EXIT_SUCCESS);
+	}
+
+	(void)wait(&sta);
+
+	if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
+		atf_tc_fail("mlock(2) locked beyond system limits");
+
+	free(buf);
+}
+
+ATF_TC(mlock_mmap);
+ATF_TC_HEAD(mlock_mmap, tc)
+{
+	atf_tc_set_md_var(tc, "descr", "Test mlock(2)-mmap(2) interaction");
+}
+
+ATF_TC_BODY(mlock_mmap, tc)
+{
+#ifdef __NetBSD__
+	static const int flags = MAP_ANON | MAP_PRIVATE | MAP_WIRED;
+#else
+	static const int flags = MAP_ANON | MAP_PRIVATE;
+#endif
+	void *buf;
+
+	/*
+	 * Make a wired RW mapping and check that mlock(2)
+	 * does not fail for the (already locked) mapping.
+	 */
+	buf = mmap(NULL, page, PROT_READ | PROT_WRITE, flags, -1, 0);
+
+	ATF_REQUIRE(buf != MAP_FAILED);
+#ifdef __FreeBSD__
+	/*
+	 * The duplicate mlock call is added to ensure that the call works
+	 * as described above without MAP_WIRED support.
+	 */
+	ATF_REQUIRE(mlock(buf, page) == 0);
+#endif
+	ATF_REQUIRE(mlock(buf, page) == 0);
+	ATF_REQUIRE(munlock(buf, page) == 0);
+	ATF_REQUIRE(munmap(buf, page) == 0);
+	ATF_REQUIRE(munlock(buf, page) != 0);
+
+	/*
+	 * But it should be impossible to mlock(2) a PROT_NONE mapping.
+	 */
+	buf = mmap(NULL, page, PROT_NONE, flags, -1, 0);
+
+	ATF_REQUIRE(buf != MAP_FAILED);
+#ifdef __FreeBSD__
+	ATF_REQUIRE_ERRNO(ENOMEM, mlock(buf, page) != 0);
+#else
+	ATF_REQUIRE(mlock(buf, page) != 0);
+#endif
+	ATF_REQUIRE(munmap(buf, page) == 0);
+}
+
+ATF_TC(mlock_nested);
+ATF_TC_HEAD(mlock_nested, tc)
+{
+	atf_tc_set_md_var(tc, "descr",
+	    "Test that consecutive mlock(2) calls succeed");
+}
+
+ATF_TC_BODY(mlock_nested, tc)
+{
+	const size_t maxiter = 100;
+	void *buf;
+
+	buf = malloc(page);
+	ATF_REQUIRE(buf != NULL);
+
+	for (size_t i = 0; i < maxiter; i++)
+		ATF_REQUIRE(mlock(buf, page) == 0);
+
+	ATF_REQUIRE(munlock(buf, page) == 0);
+	free(buf);
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+	page = sysconf(_SC_PAGESIZE);
+	ATF_REQUIRE(page >= 0);
+
+	ATF_TP_ADD_TC(tp, mlock_clip);
+	ATF_TP_ADD_TC(tp, mlock_err);
+	ATF_TP_ADD_TC(tp, mlock_limits);
+	ATF_TP_ADD_TC(tp, mlock_mmap);
+	ATF_TP_ADD_TC(tp, mlock_nested);
+
+	return atf_no_error();
+}