mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-11 13:50:06 +00:00
3b25c7fa87
This commit adds string/test-strnlen-nonarray and
wcsmbs/test-wcsnlen-nonarray.
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
(cherry picked from commit 783d4c0b81)
134 lines
4.7 KiB
C
134 lines
4.7 KiB
C
/* Test non-array inputs to string length functions.
|
|
Copyright (C) 2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* This skeleton file is included from string/test-strnlen-nonarray.c
|
|
and wcsmbs/test-wcsnlen-nonarray.c to test that reading of the array
|
|
stops at the first null character.
|
|
|
|
TEST_IDENTIFIER must be the test function identifier. TEST_NAME is
|
|
the same as a string.
|
|
|
|
CHAR must be defined as the character type. */
|
|
|
|
#include <array_length.h>
|
|
#include <string.h>
|
|
#include <support/check.h>
|
|
#include <support/next_to_fault.h>
|
|
#include <support/test-driver.h>
|
|
#include <sys/param.h>
|
|
#include <unistd.h>
|
|
|
|
typedef __typeof (TEST_IDENTIFIER) *proto_t;
|
|
|
|
#define TEST_MAIN
|
|
#include "test-string.h"
|
|
|
|
IMPL (TEST_IDENTIFIER, 1)
|
|
|
|
static int
|
|
test_main (void)
|
|
{
|
|
enum { buffer_length = 256 };
|
|
TEST_VERIFY_EXIT (sysconf (_SC_PAGESIZE) >= buffer_length);
|
|
|
|
test_init ();
|
|
|
|
/* Buffer layout: There are a_count 'A' character followed by
|
|
zero_count null character, for a total of buffer_length
|
|
character:
|
|
|
|
AAAAA...AAAAA 00000 ... 00000 (unmapped page follows)
|
|
\ / \ /
|
|
(a_count) (zero_count)
|
|
\___ (buffer_length) ___/
|
|
^
|
|
|
|
|
start_offset
|
|
|
|
The buffer length does not change, but a_count (and thus _zero)
|
|
and start_offset vary.
|
|
|
|
If start_offset == buffer_length, only 0 is a valid length
|
|
argument. The result is 0.
|
|
|
|
Otherwwise, if zero_count > 0 (if there a null characters in the
|
|
buffer), then any length argument is valid. If start_offset <
|
|
a_count (i.e., there is a non-null character at start_offset), the
|
|
result is the minimum of a_count - start_offset and the length
|
|
argument. Otherwise the result is 0.
|
|
|
|
Otherwise, there are no null characters before the unmapped page.
|
|
The length argument must not be greater than buffer_length -
|
|
start_offset, and the result is the length argument. */
|
|
|
|
struct support_next_to_fault ntf
|
|
= support_next_to_fault_allocate (buffer_length * sizeof (CHAR));
|
|
CHAR *buffer = (CHAR *) ntf.buffer;
|
|
|
|
FOR_EACH_IMPL (impl, 0)
|
|
{
|
|
printf ("info: testing %s\n", impl->name);
|
|
for (size_t i = 0; i < buffer_length; ++i)
|
|
buffer[i] = 'A';
|
|
|
|
for (int zero_count = 0; zero_count <= buffer_length; ++zero_count)
|
|
{
|
|
if (zero_count > 0)
|
|
buffer[buffer_length - zero_count] = 0;
|
|
int a_count = buffer_length - zero_count;
|
|
for (int start_offset = 0; start_offset <= buffer_length;
|
|
++start_offset)
|
|
{
|
|
CHAR *start_pointer = buffer + start_offset;
|
|
if (start_offset == buffer_length)
|
|
TEST_COMPARE (CALL (impl, buffer + start_offset, 0), 0);
|
|
else if (zero_count > 0)
|
|
for (int length_argument = 0;
|
|
length_argument <= 2 * buffer_length;
|
|
++length_argument)
|
|
{
|
|
if (test_verbose)
|
|
printf ("zero_count=%d a_count=%d start_offset=%d"
|
|
" length_argument=%d\n",
|
|
zero_count, a_count, start_offset,
|
|
length_argument);
|
|
if (start_offset < a_count)
|
|
TEST_COMPARE (CALL (impl, start_pointer, length_argument),
|
|
MIN (a_count - start_offset,
|
|
length_argument));
|
|
else
|
|
TEST_COMPARE (CALL (impl, start_pointer, length_argument),
|
|
0);
|
|
}
|
|
else
|
|
for (int length_argument = 0;
|
|
length_argument <= buffer_length - start_offset;
|
|
++length_argument)
|
|
TEST_COMPARE (CALL (impl, start_pointer, length_argument),
|
|
length_argument);
|
|
}
|
|
}
|
|
}
|
|
|
|
support_next_to_fault_free (&ntf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|