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/* $NetBSD: t_strlen.c,v 1.5 2011/07/14 07:33:20 jruoho Exp $ */
/*
* Written by J.T. Conklin <jtc@acorntoolworks.com>
* Public domain.
*/
#include <atf-c.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <unistd.h>
static void write_num(int);
static void
write_num(int val)
{
char buf[20];
int i;
for (i = sizeof buf; --i >= 0;) {
buf[i] = '0' + val % 10;
val /= 10;
if (val == 0) {
write(2, buf + i, sizeof buf - i);
return;
}
}
write(2, "overflow", 8);
}
ATF_TC(strlen_basic);
ATF_TC_HEAD(strlen_basic, tc)
{
atf_tc_set_md_var(tc, "descr", "Test strlen(3) results");
}
ATF_TC_BODY(strlen_basic, tc)
{
#ifdef __FreeBSD__
void *dl_handle;
#endif
/* try to trick the compiler */
size_t (*strlen_fn)(const char *);
unsigned int a, t;
size_t len;
char buf[64];
struct tab {
const char* val;
size_t len;
};
const struct tab tab[] = {
/*
* patterns that check for all combinations of leading and
* trailing unaligned characters (on a 64 bit processor)
*/
{ "", 0 },
{ "a", 1 },
{ "ab", 2 },
{ "abc", 3 },
{ "abcd", 4 },
{ "abcde", 5 },
{ "abcdef", 6 },
{ "abcdefg", 7 },
{ "abcdefgh", 8 },
{ "abcdefghi", 9 },
{ "abcdefghij", 10 },
{ "abcdefghijk", 11 },
{ "abcdefghijkl", 12 },
{ "abcdefghijklm", 13 },
{ "abcdefghijklmn", 14 },
{ "abcdefghijklmno", 15 },
{ "abcdefghijklmnop", 16 },
{ "abcdefghijklmnopq", 17 },
{ "abcdefghijklmnopqr", 18 },
{ "abcdefghijklmnopqrs", 19 },
{ "abcdefghijklmnopqrst", 20 },
{ "abcdefghijklmnopqrstu", 21 },
{ "abcdefghijklmnopqrstuv", 22 },
{ "abcdefghijklmnopqrstuvw", 23 },
/*
* patterns that check for the cases where the expression:
*
* ((word - 0x7f7f..7f) & 0x8080..80)
*
* returns non-zero even though there are no zero bytes in
* the word.
*/
{ "" "\xff\xff\xff\xff\xff\xff\xff\xff" "abcdefgh", 16 },
{ "a" "\xff\xff\xff\xff\xff\xff\xff\xff" "bcdefgh", 16 },
{ "ab" "\xff\xff\xff\xff\xff\xff\xff\xff" "cdefgh", 16 },
{ "abc" "\xff\xff\xff\xff\xff\xff\xff\xff" "defgh", 16 },
{ "abcd" "\xff\xff\xff\xff\xff\xff\xff\xff" "efgh", 16 },
{ "abcde" "\xff\xff\xff\xff\xff\xff\xff\xff" "fgh", 16 },
{ "abcdef" "\xff\xff\xff\xff\xff\xff\xff\xff" "gh", 16 },
{ "abcdefg" "\xff\xff\xff\xff\xff\xff\xff\xff" "h", 16 },
{ "abcdefgh" "\xff\xff\xff\xff\xff\xff\xff\xff" "", 16 },
};
/*
* During testing it is useful have the rest of the program
* use a known good version!
*/
#ifdef __FreeBSD__
dl_handle = dlopen(NULL, RTLD_LAZY);
strlen_fn = dlsym(dl_handle, "test_strlen");
#else
strlen_fn = dlsym(dlopen(NULL, RTLD_LAZY), "test_strlen");
#endif
if (!strlen_fn)
strlen_fn = strlen;
for (a = 0; a < sizeof(long); ++a) {
for (t = 0; t < (sizeof(tab) / sizeof(tab[0])); ++t) {
memcpy(&buf[a], tab[t].val, tab[t].len + 1);
len = strlen_fn(&buf[a]);
if (len != tab[t].len) {
/* Write error without using printf / strlen */
write(2, "alignment ", 10);
write_num(a);
write(2, ", test ", 7);
write_num(t);
write(2, ", got len ", 10);
write_num(len);
write(2, ", not ", 6);
write_num(tab[t].len);
write(2, ", for '", 7);
write(2, tab[t].val, tab[t].len);
write(2, "'\n", 2);
atf_tc_fail("See stderr for details");
}
}
}
#ifdef __FreeBSD__
(void)dlclose(dl_handle);
#endif
}
ATF_TC(strlen_huge);
ATF_TC_HEAD(strlen_huge, tc)
{
atf_tc_set_md_var(tc, "descr", "Test strlen(3) with huge strings");
}
ATF_TC_BODY(strlen_huge, tc)
{
long page;
char *str;
size_t i;
page = sysconf(_SC_PAGESIZE);
ATF_REQUIRE(page >= 0);
for (i = 1; i < 1000; i = i + 100) {
str = malloc(i * page + 1);
if (str == NULL)
continue;
(void)memset(str, 'x', i * page);
str[i * page] = '\0';
ATF_REQUIRE(strlen(str) == i * page);
free(str);
}
}
ATF_TC(strnlen_basic);
ATF_TC_HEAD(strnlen_basic, tc)
{
atf_tc_set_md_var(tc, "descr", "A naive test of strnlen(3)");
}
ATF_TC_BODY(strnlen_basic, tc)
{
char buf[1];
buf[0] = '\0';
ATF_CHECK(strnlen(buf, 000) == 0);
ATF_CHECK(strnlen(buf, 111) == 0);
ATF_CHECK(strnlen("xxx", 0) == 0);
ATF_CHECK(strnlen("xxx", 1) == 1);
ATF_CHECK(strnlen("xxx", 2) == 2);
ATF_CHECK(strnlen("xxx", 3) == 3);
ATF_CHECK(strnlen("xxx", 9) == 3);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, strlen_basic);
ATF_TP_ADD_TC(tp, strlen_huge);
ATF_TP_ADD_TC(tp, strnlen_basic);
return atf_no_error();
}
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