Date: Sun, 27 Sep 2009 21:03:33 +0000 (UTC) From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r197543 - head/tools/regression/mmap Message-ID: <200909272103.n8RL3XV8034538@svn.freebsd.org>
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Author: bz Date: Sun Sep 27 21:03:33 2009 New Revision: 197543 URL: http://svn.freebsd.org/changeset/base/197543 Log: Add a simple C program to check mmap calls to various different addresses. The most important test is the mapping fixed at address 0 depending on the new sysctl. Things will be updated and possibly converted to m4/.t style once the details about the kernel patch will be shaken out. Submitted by: simon (initial version) Added: head/tools/regression/mmap/ head/tools/regression/mmap/Makefile (contents, props changed) head/tools/regression/mmap/mmap.c (contents, props changed) Added: head/tools/regression/mmap/Makefile ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/tools/regression/mmap/Makefile Sun Sep 27 21:03:33 2009 (r197543) @@ -0,0 +1,6 @@ +# $FreeBSD$ + +PROG= mmap +NO_MAN= + +.include <bsd.prog.mk> Added: head/tools/regression/mmap/mmap.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/tools/regression/mmap/mmap.c Sun Sep 27 21:03:33 2009 (r197543) @@ -0,0 +1,96 @@ +/*- + * Copyright (c) 2009 Simon L. Nielsen <simon@FreeBSD.org>, + * Bjoern A. Zeeb <bz@FreeBSD.org> + * + * 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 AUTHOR 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 AUTHOR 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. + * + * $FreeBSD$ + */ + +#include <sys/param.h> +#include <sys/mman.h> +#include <sys/sysctl.h> +#include <sys/types.h> + +#include <stdio.h> +#include <err.h> + +const struct tests { + void *addr; + int ok[2]; /* Depending on security.bsd.mmap_zero {0, !=0}. */ +} tests[] = { + { (void *)0, { 0, 1 } }, /* Test sysctl. */ + { (void *)1, { 0, 0 } }, + { (void *)(PAGE_SIZE - 1), { 0, 0 } }, + { (void *)PAGE_SIZE, { 1, 1 } }, + { (void *)-1, { 0, 0 } }, + { (void *)(-PAGE_SIZE), { 0, 0 } }, + { (void *)(-1 - PAGE_SIZE), { 0, 0 } }, + { (void *)(-1 - PAGE_SIZE - 1), { 0, 0 } }, + { (void *)(0x1000 * PAGE_SIZE), { 1, 1 } }, +}; + +int +main(void) +{ + void *p; + size_t len; + int i, error, mib[3], mmap_zero; + + error = 0; + + /* Get the current sysctl value of security.bsd.mmap_zero. */ + len = sizeof(mib) / sizeof(*mib); + if (sysctlnametomib("security.bsd.mmap_zero", mib, &len) == -1) + err(1, "sysctlnametomib(security.bsd.mmap_zero)"); + + len = sizeof(mmap_zero); + if (sysctl(mib, 3, &mmap_zero, &len, NULL, 0) == -1) + err(1, "sysctl(security.bsd.mmap_zero)"); + + /* Normalize to 0 or 1 for array access. */ + mmap_zero = !!mmap_zero; + + for (i=0; i < (sizeof(tests) / sizeof(*tests)); i++) { + p = mmap((void *)tests[i].addr, PAGE_SIZE, + PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANON | MAP_FIXED, + -1, 0); + if (p == MAP_FAILED) { + if (tests[i].ok[mmap_zero] != 0) + error++; + warnx("%s: mmap(%p, ...) failed.", + (tests[i].ok[mmap_zero] == 0) ? "OK " : "ERR", + tests[i].addr); + } else { + if (tests[i].ok[mmap_zero] != 1) + error++; + warnx("%s: mmap(%p, ...) succeeded: p=%p", + (tests[i].ok[mmap_zero] == 1) ? "OK " : "ERR", + tests[i].addr, p); + } + } + + if (error) + err(1, "---\nERROR: %d unexpected results.", error); + + return (error != 0); +}
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