minix/tests/lib/libc/sys/t_mlock.c
Lionel Sambuc 11be35a165 Importing NetBSD "Kyua" test framework
To do so, a few dependencies have been imported:

 * external/bsd/lutok
 * external/mit/lua
 * external/public-domain/sqlite
 * external/public-domain/xz

The Kyua framework is the new generation of ATF (Automated Test
Framework), it is composed of:

 * external/bsd/atf
 * external/bsd/kyua-atf-compat
 * external/bsd/kyua-cli
 * external/bsd/kyua-tester
 * tests

Kyua/ATF being written in C++, it depends on libstdc++ which is
provided by GCC. As this is not part of the sources, Kyua is only
compiled when the native GCC utils are installed.

To install Kyua do the following:

 * In a cross-build enviromnent, add the following to the build.sh
   commandline: -V MKBINUTILS=yes -V MKGCCCMDS=yes

WARNING:
  At this point the import is still experimental, and not supported
  on native builds (a.k.a make build).

Change-Id: I26aee23c5bbd2d64adcb7c1beb98fe0d479d7ada
2013-07-23 20:43:41 +02:00

242 lines
5.8 KiB
C

/* $NetBSD: t_mlock.c,v 1.4 2012/09/08 12:25:05 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 1.4 2012/09/08 12:25:05 martin Exp $");
#include <sys/mman.h>
#include <sys/resource.h>
#include <sys/wait.h>
#define _KMEMUSER
#include <machine/vmparam.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)
{
void *invalid_ptr;
int null_errno = ENOMEM; /* error expected for NULL */
#ifdef VM_MIN_ADDRESS
if ((uintptr_t)VM_MIN_ADDRESS > 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;
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();
}