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7aaa37fa1d
Extend the tests to permit loading an external memcmp function and testing it over using the libc version. This was added by the example of other tests in the test suite doing the same thing and helped tremendously in development. This change was originally part of D41442 but was taken out to permit separate review as extrapolated from @ngie's request in D41349. Sponsored by: FreeBSD Foundation Approved by: ngie Differential Revision: https://reviews.freebsd.org/D41528 (cherry picked from commit b166580681e3af173ec368656019d02ba1cc55ad)
130 lines
4.1 KiB
C
130 lines
4.1 KiB
C
/*-
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* Copyright (c) 2016 Jilles Tjoelker <jilles@FreeBSD.org>
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* All rights reserved.
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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 <assert.h>
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#include <dlfcn.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <atf-c.h>
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static int (*memcmp_fn)(const void *, const void *, size_t);
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ATF_TC_WITHOUT_HEAD(zero);
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ATF_TC_BODY(zero, tc)
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{
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assert(memcmp_fn("a", "b", 0) == 0);
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assert(memcmp_fn("", "", 0) == 0);
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}
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ATF_TC_WITHOUT_HEAD(eq);
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ATF_TC_BODY(eq, tc)
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{
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unsigned char data1[256], data2[256];
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int i;
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for (i = 0; i < 256; i++)
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data1[i] = data2[i] = i ^ 0x55;
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for (i = 1; i < 256; i++)
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assert(memcmp_fn(data1, data2, i) == 0);
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for (i = 1; i < 256; i++)
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assert(memcmp_fn(data1 + i, data2 + i, 256 - i) == 0);
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}
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ATF_TC_WITHOUT_HEAD(neq);
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ATF_TC_BODY(neq, tc)
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{
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unsigned char data1[256], data2[256];
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int i;
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for (i = 0; i < 256; i++) {
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data1[i] = i;
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data2[i] = i ^ 0x55;
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}
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for (i = 1; i < 256; i++)
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assert(memcmp_fn(data1, data2, i) != 0);
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for (i = 1; i < 256; i++)
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assert(memcmp_fn(data1 + i, data2 + i, 256 - i) != 0);
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}
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ATF_TC_WITHOUT_HEAD(diff);
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ATF_TC_BODY(diff, tc)
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{
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unsigned char data1[256], data2[256];
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int i;
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memset(data1, 'a', sizeof(data1));
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memset(data2, 'a', sizeof(data2));
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data1[128] = 255;
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data2[128] = 0;
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for (i = 1; i < 66; i++) {
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assert(memcmp_fn(data1 + 128, data2 + 128, i) == 255);
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assert(memcmp_fn(data2 + 128, data1 + 128, i) == -255);
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assert(memcmp_fn(data1 + 129 - i, data2 + 129 - i, i) == 255);
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assert(memcmp_fn(data2 + 129 - i, data1 + 129 - i, i) == -255);
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assert(memcmp_fn(data1 + 129 - i, data2 + 129 - i, i * 2) == 255);
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assert(memcmp_fn(data2 + 129 - i, data1 + 129 - i, i * 2) == -255);
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}
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data1[128] = 'c';
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data2[128] = 'e';
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for (i = 1; i < 66; i++) {
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assert(memcmp_fn(data1 + 128, data2 + 128, i) == -2);
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assert(memcmp_fn(data2 + 128, data1 + 128, i) == 2);
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assert(memcmp_fn(data1 + 129 - i, data2 + 129 - i, i) == -2);
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assert(memcmp_fn(data2 + 129 - i, data1 + 129 - i, i) == 2);
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assert(memcmp_fn(data1 + 129 - i, data2 + 129 - i, i * 2) == -2);
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assert(memcmp_fn(data2 + 129 - i, data1 + 129 - i, i * 2) == 2);
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}
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memset(data1 + 129, 'A', sizeof(data1) - 129);
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memset(data2 + 129, 'Z', sizeof(data2) - 129);
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for (i = 1; i < 66; i++) {
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assert(memcmp_fn(data1 + 128, data2 + 128, i) == -2);
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assert(memcmp_fn(data2 + 128, data1 + 128, i) == 2);
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assert(memcmp_fn(data1 + 129 - i, data2 + 129 - i, i) == -2);
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assert(memcmp_fn(data2 + 129 - i, data1 + 129 - i, i) == 2);
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assert(memcmp_fn(data1 + 129 - i, data2 + 129 - i, i * 2) == -2);
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assert(memcmp_fn(data2 + 129 - i, data1 + 129 - i, i * 2) == 2);
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}
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}
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ATF_TP_ADD_TCS(tp)
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{
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void *dl_handle;
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dl_handle = dlopen(NULL, RTLD_LAZY);
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memcmp_fn = dlsym(dl_handle, "test_memcmp");
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if (memcmp_fn == NULL)
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memcmp_fn = memcmp;
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ATF_TP_ADD_TC(tp, zero);
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ATF_TP_ADD_TC(tp, eq);
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ATF_TP_ADD_TC(tp, neq);
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ATF_TP_ADD_TC(tp, diff);
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return (atf_no_error());
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}
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