diff options
Diffstat (limited to 'contrib/netbsd-tests/lib/libc/sys/t_mlock.c')
| -rw-r--r-- | contrib/netbsd-tests/lib/libc/sys/t_mlock.c | 244 |
1 files changed, 244 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..52576f7 --- /dev/null +++ b/contrib/netbsd-tests/lib/libc/sys/t_mlock.c @@ -0,0 +1,244 @@ +/* $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 $"); + +#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> + +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) +{ + unsigned long vmin = 0; + size_t len = sizeof(vmin); + void *invalid_ptr; + int null_errno = ENOMEM; /* error expected for NULL */ + + 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 */ + + 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; + + if (mlock(buf, i) != -1 || errno != EAGAIN) { + (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) +{ + static const int flags = MAP_ANON | MAP_PRIVATE | MAP_WIRED; + 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); + 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); + ATF_REQUIRE(mlock(buf, page) != 0); + 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(); +} |
