mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-06 17:18:32 +00:00
691ff1832e
The "values" test case is specifically crafted to detect the off-by-one error previous discovered in the scalar strchrnul implementation. Tested by: developers@, exp-run Approved by: mjg MFC after: 1 month MFC to: stable/14 PR: 275785 Differential Revision: https://reviews.freebsd.org/D42925
117 lines
2.2 KiB
C
117 lines
2.2 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2023 Robert Clausecker
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
#include <dlfcn.h>
|
|
#include <limits.h>
|
|
#include <string.h>
|
|
|
|
#include <atf-c.h>
|
|
|
|
static void *(*memrchr_fn)(const void *, int, size_t);
|
|
|
|
ATF_TC_WITHOUT_HEAD(null);
|
|
ATF_TC_BODY(null, tc)
|
|
{
|
|
ATF_CHECK_EQ(memrchr_fn(NULL, 42, 0), NULL);
|
|
}
|
|
|
|
ATF_TC_WITHOUT_HEAD(not_found);
|
|
ATF_TC_BODY(not_found, tc)
|
|
{
|
|
size_t i, j;
|
|
char buf[1+15+64+1]; /* offset [0..15] + 64 buffer bytes + sentinels */
|
|
|
|
buf[0] = 'X';
|
|
memset(buf + 1, '-', sizeof(buf) - 1);
|
|
|
|
for (i = 0; i < 16; i++)
|
|
for (j = 0; j < 64; j++) {
|
|
buf[i + j + 1] = 'X';
|
|
ATF_CHECK_EQ(memrchr_fn(buf + i + 1, 'X', j), NULL);
|
|
buf[i + j + 1] = '-';
|
|
}
|
|
}
|
|
|
|
static void
|
|
do_found_test(char buf[], size_t len, size_t first, size_t second)
|
|
{
|
|
/* invariant: first <= second */
|
|
|
|
buf[first] = 'X';
|
|
buf[second] = 'X';
|
|
ATF_CHECK_EQ(memrchr_fn(buf, 'X', len), buf + second);
|
|
buf[first] = '-';
|
|
buf[second] = '-';
|
|
}
|
|
|
|
ATF_TC_WITHOUT_HEAD(found);
|
|
ATF_TC_BODY(found, tc)
|
|
{
|
|
size_t i, j, k, l;
|
|
char buf[1+15+64+1];
|
|
|
|
buf[0] = 'X';
|
|
memset(buf + 1, '-', sizeof(buf) - 1);
|
|
|
|
for (i = 0; i < 16; i++)
|
|
for (j = 0; j < 64; j++)
|
|
for (k = 0; k < j; k++)
|
|
for (l = 0; l <= k; l++) {
|
|
buf[i + j + 1] = 'X';
|
|
do_found_test(buf + i + 1, j, l, k);
|
|
buf[i + j + 1] = '-';
|
|
}
|
|
}
|
|
|
|
/* check that the right character is found */
|
|
static void
|
|
do_values_test(unsigned char buf[], size_t len, size_t i, int c)
|
|
{
|
|
/* sentinels */
|
|
buf[-1] = c;
|
|
buf[len] = c;
|
|
memset(buf, c + 1, len);
|
|
|
|
if (i < len) {
|
|
buf[i] = c;
|
|
ATF_CHECK_EQ(memrchr_fn(buf, c, len), buf + i);
|
|
} else
|
|
ATF_CHECK_EQ(memrchr_fn(buf, c, len), NULL);
|
|
}
|
|
|
|
ATF_TC_WITHOUT_HEAD(values);
|
|
ATF_TC_BODY(values, tc)
|
|
{
|
|
size_t i, j, k;
|
|
int c;
|
|
unsigned char buf[1+15+64+1];
|
|
|
|
for (i = 0; i < 16; i++)
|
|
for (j = 0; j < 64; j++)
|
|
for (k = 0; k <= j; k++)
|
|
for (c = 0; c <= UCHAR_MAX; c++)
|
|
do_values_test(buf + i + 1, j, k, c);
|
|
}
|
|
|
|
ATF_TP_ADD_TCS(tp)
|
|
{
|
|
void *dl_handle;
|
|
|
|
dl_handle = dlopen(NULL, RTLD_LAZY);
|
|
memrchr_fn = dlsym(dl_handle, "test_memrchr");
|
|
if (memrchr_fn == NULL)
|
|
memrchr_fn = memrchr;
|
|
|
|
ATF_TP_ADD_TC(tp, null);
|
|
ATF_TP_ADD_TC(tp, not_found);
|
|
ATF_TP_ADD_TC(tp, found);
|
|
ATF_TP_ADD_TC(tp, values);
|
|
|
|
return (atf_no_error());
|
|
}
|