Module Name: src
Committed By: jruoho
Date: Thu Mar 31 13:07:20 UTC 2011
Modified Files:
src/distrib/sets/lists/tests: mi
src/tests/syscall: Makefile
Added Files:
src/tests/syscall: t_mmap.c
Log Message:
Add some basic tests for mmap(2), including one for the vm.user_va0_disable.
To generate a diff of this commit:
cvs rdiff -u -r1.281 -r1.282 src/distrib/sets/lists/tests/mi
cvs rdiff -u -r1.10 -r1.11 src/tests/syscall/Makefile
cvs rdiff -u -r0 -r1.1 src/tests/syscall/t_mmap.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/distrib/sets/lists/tests/mi
diff -u src/distrib/sets/lists/tests/mi:1.281 src/distrib/sets/lists/tests/mi:1.282
--- src/distrib/sets/lists/tests/mi:1.281 Wed Mar 30 17:02:17 2011
+++ src/distrib/sets/lists/tests/mi Thu Mar 31 13:07:20 2011
@@ -1,4 +1,4 @@
-# $NetBSD: mi,v 1.281 2011/03/30 17:02:17 jruoho Exp $
+# $NetBSD: mi,v 1.282 2011/03/31 13:07:20 jruoho Exp $
#
# Note: don't delete entries from here - mark them as "obsolete" instead.
#
@@ -563,6 +563,7 @@
./usr/libdata/debug/usr/tests/syscall tests-syscall-debug
./usr/libdata/debug/usr/tests/syscall/t_cmsg.debug tests-syscall-debug debug,atf
./usr/libdata/debug/usr/tests/syscall/t_fsync.debug tests-syscall-debug debug,atf
+./usr/libdata/debug/usr/tests/syscall/t_mmap.debug tests-syscall-debug debug,atf
./usr/libdata/debug/usr/tests/syscall/t_timer.debug tests-syscall-debug debug,atf
./usr/libdata/debug/usr/tests/usr.bin tests-sbin-tests
./usr/libdata/debug/usr/tests/usr.sbin tests-sbin-tests
@@ -2096,6 +2097,7 @@
./usr/tests/syscall/Atffile tests-syscall-tests atf
./usr/tests/syscall/t_cmsg tests-syscall-tests atf
./usr/tests/syscall/t_fsync tests-syscall-tests atf
+./usr/tests/syscall/t_mmap tests-syscall-tests atf
./usr/tests/syscall/t_timer tests-syscall-tests atf
./usr/tests/toolchain tests-syscall-tests atf
./usr/tests/toolchain/Atffile tests-syscall-tests atf
Index: src/tests/syscall/Makefile
diff -u src/tests/syscall/Makefile:1.10 src/tests/syscall/Makefile:1.11
--- src/tests/syscall/Makefile:1.10 Wed Mar 30 09:43:21 2011
+++ src/tests/syscall/Makefile Thu Mar 31 13:07:20 2011
@@ -1,10 +1,10 @@
-# $NetBSD: Makefile,v 1.10 2011/03/30 09:43:21 jruoho Exp $
+# $NetBSD: Makefile,v 1.11 2011/03/31 13:07:20 jruoho Exp $
.include <bsd.own.mk>
TESTSDIR= ${TESTSBASE}/syscall
-TESTS_C+= t_cmsg t_fsync t_timer
+TESTS_C+= t_cmsg t_fsync t_mmap t_timer
LDADD.t_cmsg+= -lrumpnet_local -lrumpnet_net -lrumpnet
LDADD.t_cmsg+= -lrumpvfs -lrump -lrumpuser -lpthread
Added files:
Index: src/tests/syscall/t_mmap.c
diff -u /dev/null src/tests/syscall/t_mmap.c:1.1
--- /dev/null Thu Mar 31 13:07:20 2011
+++ src/tests/syscall/t_mmap.c Thu Mar 31 13:07:20 2011
@@ -0,0 +1,321 @@
+/* $NetBSD: t_mmap.c,v 1.1 2011/03/31 13:07:20 jruoho Exp $ */
+
+/*-
+ * Copyright (c) 2011 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_mmap.c,v 1.1 2011/03/31 13:07:20 jruoho Exp $");
+
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/sysctl.h>
+#include <sys/wait.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <atf-c.h>
+
+static long page = 0;
+static char path[] = "/tmp/mmap";
+static void map_check(void *, int);
+static void map_sighandler(int);
+
+static void
+map_check(void *map, int flag)
+{
+
+ if (flag != 0) {
+ ATF_REQUIRE(map == MAP_FAILED);
+ return;
+ }
+
+ ATF_REQUIRE(map != MAP_FAILED);
+ ATF_REQUIRE(munmap(map, page) == 0);
+}
+
+static void
+map_sighandler(int signo)
+{
+ exit(signo);
+}
+
+ATF_TC(mmap_err);
+ATF_TC_HEAD(mmap_err, tc)
+{
+ atf_tc_set_md_var(tc, "descr", "Test error conditions of mmap(2)");
+}
+
+ATF_TC_BODY(mmap_err, tc)
+{
+ size_t addr = SIZE_MAX;
+ void *map;
+
+ errno = 0;
+ map = mmap(NULL, 3, PROT_READ, MAP_FILE, -1, 0);
+
+ ATF_REQUIRE(map == MAP_FAILED);
+ ATF_REQUIRE(errno == EBADF);
+
+ errno = 0;
+ map = mmap(&addr, page, PROT_READ, MAP_FIXED, -1, 0);
+
+ ATF_REQUIRE(map == MAP_FAILED);
+ ATF_REQUIRE(errno == EINVAL);
+
+ errno = 0;
+ map = mmap(NULL, page, PROT_READ, MAP_ANON, INT_MAX, 0);
+
+ ATF_REQUIRE(map == MAP_FAILED);
+ ATF_REQUIRE(errno == EINVAL);
+}
+
+ATF_TC_WITH_CLEANUP(mmap_prot_1);
+ATF_TC_HEAD(mmap_prot_1, tc)
+{
+ atf_tc_set_md_var(tc, "descr", "Test mmap(2) protections, #1");
+}
+
+ATF_TC_BODY(mmap_prot_1, tc)
+{
+ void *map;
+ int fd;
+
+ /*
+ * Open a file write-only and try to
+ * map it read-only. This should fail.
+ */
+ fd = open(path, O_WRONLY | O_CREAT, 0700);
+
+ if (fd < 0)
+ return;
+
+ ATF_REQUIRE(write(fd, "XXX", 3) == 3);
+
+ map = mmap(NULL, 3, PROT_READ, MAP_FILE, fd, 0);
+ map_check(map, 1);
+
+ map = mmap(NULL, 3, PROT_WRITE, MAP_FILE, fd, 0);
+ map_check(map, 0);
+
+ ATF_REQUIRE(close(fd) == 0);
+}
+
+ATF_TC_CLEANUP(mmap_prot_1, tc)
+{
+ (void)unlink(path);
+}
+
+ATF_TC(mmap_prot_2);
+ATF_TC_HEAD(mmap_prot_2, tc)
+{
+ atf_tc_set_md_var(tc, "descr", "Test mmap(2) protections, #2");
+}
+
+ATF_TC_BODY(mmap_prot_2, tc)
+{
+ char buf[2];
+ void *map;
+ pid_t pid;
+ int sta;
+
+ /*
+ * Make a PROT_NONE mapping and try to access it.
+ * If we catch a SIGSEGV, all works as expected.
+ */
+ map = mmap(NULL, page, PROT_NONE, MAP_ANON, -1, 0);
+ ATF_REQUIRE(map != MAP_FAILED);
+
+ pid = fork();
+ ATF_REQUIRE(pid >= 0);
+
+ if (pid == 0) {
+ ATF_REQUIRE(signal(SIGSEGV, map_sighandler) != SIG_ERR);
+ ATF_REQUIRE(strlcpy(buf, map, sizeof(buf)) != 0);
+ }
+
+ (void)wait(&sta);
+
+ ATF_REQUIRE(WIFEXITED(sta) != 0);
+ ATF_REQUIRE(WEXITSTATUS(sta) == SIGSEGV);
+ ATF_REQUIRE(munmap(map, page) == 0);
+}
+
+ATF_TC_WITH_CLEANUP(mmap_prot_3);
+ATF_TC_HEAD(mmap_prot_3, tc)
+{
+ atf_tc_set_md_var(tc, "descr", "Test mmap(2) protections, #3");
+}
+
+ATF_TC_BODY(mmap_prot_3, tc)
+{
+ char buf[2];
+ int fd, sta;
+ void *map;
+ pid_t pid;
+
+ /*
+ * Open a file, change the permissions
+ * to read-only, and try to map it as
+ * PROT_NONE. This should succeed, but
+ * the access should generate SIGSEGV.
+ */
+ fd = open(path, O_RDWR | O_CREAT, 0700);
+
+ if (fd < 0)
+ return;
+
+ ATF_REQUIRE(write(fd, "XXX", 3) == 3);
+ ATF_REQUIRE(close(fd) == 0);
+ ATF_REQUIRE(chmod(path, 0444) == 0);
+
+ fd = open(path, O_RDONLY);
+ ATF_REQUIRE(fd != -1);
+
+ map = mmap(NULL, 3, PROT_NONE, MAP_FILE | MAP_SHARED, fd, 0);
+ ATF_REQUIRE(map != MAP_FAILED);
+
+ pid = fork();
+
+ ATF_REQUIRE(pid >= 0);
+
+ if (pid == 0) {
+ ATF_REQUIRE(signal(SIGSEGV, map_sighandler) != SIG_ERR);
+ ATF_REQUIRE(strlcpy(buf, map, sizeof(buf)) != 0);
+ }
+
+ (void)wait(&sta);
+
+ ATF_REQUIRE(WIFEXITED(sta) != 0);
+ ATF_REQUIRE(WEXITSTATUS(sta) == SIGSEGV);
+ ATF_REQUIRE(munmap(map, 3) == 0);
+}
+
+ATF_TC_CLEANUP(mmap_prot_3, tc)
+{
+ (void)unlink(path);
+}
+
+ATF_TC_WITH_CLEANUP(mmap_truncate);
+ATF_TC_HEAD(mmap_truncate, tc)
+{
+ atf_tc_set_md_var(tc, "descr", "Test mmap(2) and ftruncate(2)");
+}
+
+ATF_TC_BODY(mmap_truncate, tc)
+{
+ char *map;
+ long i;
+ int fd;
+
+ fd = open(path, O_RDWR | O_CREAT, 0700);
+
+ if (fd < 0)
+ return;
+
+ /*
+ * See that ftruncate(2) works
+ * while the file is mapped.
+ */
+ ATF_REQUIRE(ftruncate(fd, page) == 0);
+
+ map = mmap(NULL, page, PROT_READ | PROT_WRITE, MAP_FILE, fd, 0);
+ ATF_REQUIRE(map != MAP_FAILED);
+
+ for (i = 0; i < page; i++)
+ map[i] = 'x';
+
+ ATF_REQUIRE(ftruncate(fd, 0) == 0);
+ ATF_REQUIRE(ftruncate(fd, page / 8) == 0);
+ ATF_REQUIRE(ftruncate(fd, page / 4) == 0);
+ ATF_REQUIRE(ftruncate(fd, page / 2) == 0);
+ ATF_REQUIRE(ftruncate(fd, page / 12) == 0);
+ ATF_REQUIRE(ftruncate(fd, page / 64) == 0);
+
+ ATF_REQUIRE(close(fd) == 0);
+}
+
+ATF_TC_CLEANUP(mmap_truncate, tc)
+{
+ (void)unlink(path);
+}
+
+ATF_TC(mmap_va0);
+ATF_TC_HEAD(mmap_va0, tc)
+{
+ atf_tc_set_md_var(tc, "descr", "Test mmap(2) and vm.user_va0_disable");
+}
+
+ATF_TC_BODY(mmap_va0, tc)
+{
+ int flags = MAP_ANON | MAP_FIXED | MAP_PRIVATE;
+ size_t len = sizeof(int);
+ void *map;
+ int val;
+
+ /*
+ * Make an anonymous fixed mapping at zero address. If the address
+ * is restricted as noted in security(7), the syscall should fail.
+ */
+ if (sysctlbyname("vm.user_va0_disable", &val, &len, NULL, 0) != 0)
+ atf_tc_fail("failed to read vm.user_va0_disable");
+
+ map = mmap(NULL, page, PROT_EXEC, flags, -1, 0);
+ map_check(map, val);
+
+ map = mmap(NULL, page, PROT_READ, flags, -1, 0);
+ map_check(map, val);
+
+ map = mmap(NULL, page, PROT_WRITE, flags, -1, 0);
+ map_check(map, val);
+
+ map = mmap(NULL, page, PROT_READ|PROT_WRITE, flags, -1, 0);
+ map_check(map, val);
+
+ map = mmap(NULL, page, PROT_EXEC|PROT_READ|PROT_WRITE, flags, -1, 0);
+ map_check(map, val);
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+ page = sysconf(_SC_PAGESIZE);
+ ATF_REQUIRE(page >= 0);
+
+ ATF_TP_ADD_TC(tp, mmap_err);
+ ATF_TP_ADD_TC(tp, mmap_prot_1);
+ ATF_TP_ADD_TC(tp, mmap_prot_2);
+ ATF_TP_ADD_TC(tp, mmap_prot_3);
+ ATF_TP_ADD_TC(tp, mmap_truncate);
+ ATF_TP_ADD_TC(tp, mmap_va0);
+
+ return atf_no_error();
+}
