mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-09 23:00:07 +00:00
136 lines
3.1 KiB
C
136 lines
3.1 KiB
C
/* Test for reallocarray.
|
|
Copyright (C) 2017-2020 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/>. */
|
|
|
|
#include <errno.h>
|
|
#include <malloc.h>
|
|
#include <string.h>
|
|
#include <support/check.h>
|
|
#include <libc-diag.h>
|
|
|
|
static void *
|
|
reallocarray_nowarn (void *ptr, size_t nmemb, size_t size)
|
|
{
|
|
#if __GNUC_PREREQ (7, 0)
|
|
/* GCC 7 warns about too-large allocations; here we want to test
|
|
that they fail. */
|
|
DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
|
|
#endif
|
|
void *ret = reallocarray (ptr, nmemb, size);
|
|
#if __GNUC_PREREQ (7, 0)
|
|
DIAG_POP_NEEDS_COMMENT;
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
void *ptr = NULL;
|
|
void *ptr2 = NULL;
|
|
unsigned char *c;
|
|
size_t i;
|
|
int ok;
|
|
const size_t max = ~(size_t)0;
|
|
size_t a, b;
|
|
|
|
/* Test overflow detection. */
|
|
errno = 0;
|
|
ptr = reallocarray_nowarn (NULL, max, 2);
|
|
TEST_VERIFY (!ptr);
|
|
TEST_VERIFY (errno == ENOMEM);
|
|
|
|
errno = 0;
|
|
ptr = reallocarray_nowarn (NULL, 2, max);
|
|
TEST_VERIFY (!ptr);
|
|
TEST_VERIFY (errno == ENOMEM);
|
|
|
|
a = 65537;
|
|
b = max/65537 + 1;
|
|
errno = 0;
|
|
ptr = reallocarray_nowarn (NULL, a, b);
|
|
TEST_VERIFY (!ptr);
|
|
TEST_VERIFY (errno == ENOMEM);
|
|
|
|
errno = 0;
|
|
ptr = reallocarray_nowarn (NULL, b, a);
|
|
TEST_VERIFY (!ptr);
|
|
TEST_VERIFY (errno == ENOMEM);
|
|
|
|
/* Test realloc-like behavior. */
|
|
/* Allocate memory like malloc. */
|
|
ptr = reallocarray (NULL, 10, 2);
|
|
TEST_VERIFY_EXIT (ptr);
|
|
TEST_VERIFY_EXIT (malloc_usable_size (ptr) >= 10*2);
|
|
|
|
memset (ptr, 0xAF, 10*2);
|
|
|
|
/* Enlarge buffer. */
|
|
ptr2 = reallocarray (ptr, 20, 2);
|
|
TEST_VERIFY (ptr2);
|
|
if (ptr2)
|
|
ptr = ptr2;
|
|
TEST_VERIFY (malloc_usable_size (ptr) >= 20*2);
|
|
|
|
c = ptr;
|
|
ok = 1;
|
|
for (i = 0; i < 10*2; ++i)
|
|
{
|
|
if (c[i] != 0xAF)
|
|
ok = 0;
|
|
}
|
|
TEST_VERIFY (ok);
|
|
|
|
/* Decrease buffer size. */
|
|
ptr2 = reallocarray (ptr, 5, 3);
|
|
TEST_VERIFY (ptr2);
|
|
if (ptr2)
|
|
ptr = ptr2;
|
|
TEST_VERIFY_EXIT (malloc_usable_size (ptr) >= 5*3);
|
|
|
|
c = ptr;
|
|
ok = 1;
|
|
for (i = 0; i < 5*3; ++i)
|
|
{
|
|
if (c[i] != 0xAF)
|
|
ok = 0;
|
|
}
|
|
TEST_VERIFY (ok);
|
|
|
|
/* Overflow should leave buffer untouched. */
|
|
errno = 0;
|
|
ptr2 = reallocarray_nowarn (ptr, 2, ~(size_t)0);
|
|
TEST_VERIFY (!ptr2);
|
|
TEST_VERIFY (errno == ENOMEM);
|
|
|
|
c = ptr;
|
|
ok = 1;
|
|
for (i = 0; i < 5*3; ++i)
|
|
{
|
|
if (c[i] != 0xAF)
|
|
ok = 0;
|
|
}
|
|
TEST_VERIFY (ok);
|
|
|
|
free (ptr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|