150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2018 Mark Johnston <markj@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/mman.h>
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#include <errno.h>
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#include <stdint.h>
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#include <string.h>
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#include <unistd.h>
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#include <atf-c.h>
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ATF_TC(brk_basic);
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ATF_TC_HEAD(brk_basic, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Verify basic brk() functionality");
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}
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ATF_TC_BODY(brk_basic, tc)
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{
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void *oldbrk, *newbrk;
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int error;
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/* Reset the break. */
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error = brk(0);
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ATF_REQUIRE_MSG(error == 0, "brk: %s", strerror(errno));
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oldbrk = sbrk(0);
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ATF_REQUIRE(oldbrk != (void *)-1);
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/* Try to allocate a page. */
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error = brk((void *)((intptr_t)oldbrk + PAGE_SIZE * 2));
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ATF_REQUIRE_MSG(error == 0, "brk: %s", strerror(errno));
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/*
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* Attempt to set the break below minbrk. This should have no effect.
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*/
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error = brk((void *)((intptr_t)oldbrk - 1));
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ATF_REQUIRE_MSG(error == 0, "brk: %s", strerror(errno));
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newbrk = sbrk(0);
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ATF_REQUIRE_MSG(newbrk != (void *)-1, "sbrk: %s", strerror(errno));
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ATF_REQUIRE(newbrk == oldbrk);
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}
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ATF_TC(sbrk_basic);
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ATF_TC_HEAD(sbrk_basic, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Verify basic sbrk() functionality");
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}
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ATF_TC_BODY(sbrk_basic, tc)
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{
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void *newbrk, *oldbrk;
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int *p;
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oldbrk = sbrk(0);
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ATF_REQUIRE_MSG(oldbrk != (void *)-1, "sbrk: %s", strerror(errno));
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p = sbrk(sizeof(*p));
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*p = 0;
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ATF_REQUIRE(oldbrk == p);
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newbrk = sbrk(-sizeof(*p));
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ATF_REQUIRE_MSG(newbrk != (void *)-1, "sbrk: %s", strerror(errno));
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ATF_REQUIRE(oldbrk == sbrk(0));
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oldbrk = sbrk(PAGE_SIZE * 2 + 1);
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ATF_REQUIRE_MSG(oldbrk != (void *)-1, "sbrk: %s", strerror(errno));
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memset(oldbrk, 0, PAGE_SIZE * 2 + 1);
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newbrk = sbrk(-(PAGE_SIZE * 2 + 1));
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ATF_REQUIRE_MSG(newbrk != (void *)-1, "sbrk: %s", strerror(errno));
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ATF_REQUIRE(sbrk(0) == oldbrk);
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}
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ATF_TC(mlockfuture);
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ATF_TC_HEAD(mlockfuture, tc)
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{
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atf_tc_set_md_var(tc, "descr",
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"Verify that mlockall(MCL_FUTURE) applies to the data segment");
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}
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ATF_TC_BODY(mlockfuture, tc)
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{
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void *oldbrk, *n, *newbrk;
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int error;
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char v;
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error = mlockall(MCL_FUTURE);
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ATF_REQUIRE_MSG(error == 0,
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"mlockall: %s", strerror(errno));
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/*
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* Advance the break so that at least one page is added to the data
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* segment. This page should be automatically faulted in to the address
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* space.
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*/
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oldbrk = sbrk(0);
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ATF_REQUIRE(oldbrk != (void *)-1);
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newbrk = sbrk(PAGE_SIZE * 2);
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ATF_REQUIRE(newbrk != (void *)-1);
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n = (void *)(((uintptr_t)oldbrk + PAGE_SIZE) & ~PAGE_SIZE);
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v = 0;
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error = mincore(n, PAGE_SIZE, &v);
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ATF_REQUIRE_MSG(error == 0,
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"mincore: %s", strerror(errno));
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ATF_REQUIRE_MSG((v & MINCORE_INCORE) != 0,
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"unexpected page flags %#x", v);
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error = brk(oldbrk);
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ATF_REQUIRE(error == 0);
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error = munlockall();
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ATF_REQUIRE_MSG(error == 0,
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"munlockall: %s", strerror(errno));
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, brk_basic);
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ATF_TP_ADD_TC(tp, sbrk_basic);
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ATF_TP_ADD_TC(tp, mlockfuture);
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return (atf_no_error());
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}
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