From owner-svn-src-all@FreeBSD.ORG Tue Nov 15 05:55:16 2011 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5C5F7106566B; Tue, 15 Nov 2011 05:55:16 +0000 (UTC) (envelope-from das@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id 4BB818FC14; Tue, 15 Nov 2011 05:55:16 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id pAF5tG1v083305; Tue, 15 Nov 2011 05:55:16 GMT (envelope-from das@svn.freebsd.org) Received: (from das@localhost) by svn.freebsd.org (8.14.4/8.14.4/Submit) id pAF5tGE7083302; Tue, 15 Nov 2011 05:55:16 GMT (envelope-from das@svn.freebsd.org) Message-Id: <201111150555.pAF5tGE7083302@svn.freebsd.org> From: David Schultz Date: Tue, 15 Nov 2011 05:55:16 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r227522 - head/tools/regression/lib/libc/gen X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Nov 2011 05:55:16 -0000 Author: das Date: Tue Nov 15 05:55:15 2011 New Revision: 227522 URL: http://svn.freebsd.org/changeset/base/227522 Log: A regression test to ensure that arc4random returns different sequences in parent and child processes after a fork. Added: head/tools/regression/lib/libc/gen/test-arc4random.c (contents, props changed) Modified: head/tools/regression/lib/libc/gen/Makefile Modified: head/tools/regression/lib/libc/gen/Makefile ============================================================================== --- head/tools/regression/lib/libc/gen/Makefile Tue Nov 15 05:49:34 2011 (r227521) +++ head/tools/regression/lib/libc/gen/Makefile Tue Nov 15 05:55:15 2011 (r227522) @@ -1,6 +1,7 @@ # $FreeBSD$ -TESTS= test-fmtcheck test-fnmatch test-fpclassify test-posix_spawn test-wordexp +TESTS= test-arc4random test-fmtcheck test-fnmatch \ + test-fpclassify test-posix_spawn test-wordexp .PHONY: tests tests: ${TESTS} Added: head/tools/regression/lib/libc/gen/test-arc4random.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/tools/regression/lib/libc/gen/test-arc4random.c Tue Nov 15 05:55:15 2011 (r227522) @@ -0,0 +1,89 @@ +/*- + * Copyright (c) 2011 David Schultz + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include +#include +#include +#include + +/* + * BUFSIZE is the number of bytes of rc4 output to compare. The probability + * that this test fails spuriously is 2**(-BUFSIZE * 8). + */ +#define BUFSIZE 8 + +/* + * Test whether arc4random_buf() returns the same sequence of bytes in both + * parent and child processes. (Hint: It shouldn't.) + */ +int main(int argc, char *argv[]) { + struct shared_page { + char parentbuf[BUFSIZE]; + char childbuf[BUFSIZE]; + } *page; + pid_t pid; + char c; + + printf("1..1\n"); + + page = mmap(NULL, sizeof(struct shared_page), PROT_READ | PROT_WRITE, + MAP_ANON | MAP_SHARED, -1, 0); + if (page == MAP_FAILED) { + printf("fail 1 - mmap\n"); + exit(1); + } + + arc4random_buf(&c, 1); + + pid = fork(); + if (pid < 0) { + printf("fail 1 - fork\n"); + exit(1); + } + if (pid == 0) { + /* child */ + arc4random_buf(page->childbuf, BUFSIZE); + exit(0); + } else { + /* parent */ + int status; + arc4random_buf(page->parentbuf, BUFSIZE); + wait(&status); + } + if (memcmp(page->parentbuf, page->childbuf, BUFSIZE) == 0) { + printf("fail 1 - sequences are the same\n"); + exit(1); + } + + printf("ok 1 - sequences are different\n"); + exit(0); +}