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https://sourceware.org/git/glibc.git
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133 lines
2.8 KiB
C
133 lines
2.8 KiB
C
/* Copyright (C) 2000-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <error.h>
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#include <limits.h>
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#include <malloc.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <libc-diag.h>
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/* Number of samples per size. */
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#define N 50000
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static void
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fixed_test (int size)
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{
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char *ptrs[N];
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int i;
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for (i = 0; i < N; ++i)
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{
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int j;
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ptrs[i] = (char *) calloc (1, size);
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if (ptrs[i] == NULL)
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break;
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for (j = 0; j < size; ++j)
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{
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if (ptrs[i][j] != '\0')
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error (EXIT_FAILURE, 0,
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"byte not cleared (size %d, element %d, byte %d)",
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size, i, j);
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ptrs[i][j] = '\xff';
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}
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}
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while (i-- > 0)
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free (ptrs[i]);
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}
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static void
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random_test (void)
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{
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char *ptrs[N];
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int i;
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for (i = 0; i < N; ++i)
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{
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int j;
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int n = 1 + random () % 10;
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int elem = 1 + random () % 100;
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int size = n * elem;
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ptrs[i] = (char *) calloc (n, elem);
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if (ptrs[i] == NULL)
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break;
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for (j = 0; j < size; ++j)
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{
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if (ptrs[i][j] != '\0')
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error (EXIT_FAILURE, 0,
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"byte not cleared (size %d, element %d, byte %d)",
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size, i, j);
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ptrs[i][j] = '\xff';
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}
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}
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while (i-- > 0)
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free (ptrs[i]);
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}
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static void
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null_test (void)
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{
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/* If the size is 0 the result is implementation defined. Just make
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sure the program doesn't crash. The result of calloc is
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deliberately ignored, so do not warn about that. */
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DIAG_PUSH_NEEDS_COMMENT;
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DIAG_IGNORE_NEEDS_COMMENT (10, "-Wunused-result");
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calloc (0, 0);
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calloc (0, UINT_MAX);
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calloc (UINT_MAX, 0);
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calloc (0, ~((size_t) 0));
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calloc (~((size_t) 0), 0);
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DIAG_POP_NEEDS_COMMENT;
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}
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static int
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do_test (void)
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{
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/* We are allocating blocks with `calloc' and check whether every
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block is completely cleared. We first try this for some fixed
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times and then with random size. */
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fixed_test (15);
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fixed_test (5);
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fixed_test (17);
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fixed_test (6);
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fixed_test (31);
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fixed_test (96);
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random_test ();
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null_test ();
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return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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