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Diffstat (limited to 'REORG.TODO/malloc/tst-calloc.c')
| -rw-r--r-- | REORG.TODO/malloc/tst-calloc.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/REORG.TODO/malloc/tst-calloc.c b/REORG.TODO/malloc/tst-calloc.c new file mode 100644 index 0000000000..c4236809f3 --- /dev/null +++ b/REORG.TODO/malloc/tst-calloc.c @@ -0,0 +1,128 @@ +/* Copyright (C) 2000-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>. + + 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 + <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <error.h> +#include <limits.h> +#include <malloc.h> +#include <stdlib.h> +#include <stdio.h> + + +/* Number of samples per size. */ +#define N 50000 + + +static void +fixed_test (int size) +{ + char *ptrs[N]; + int i; + + for (i = 0; i < N; ++i) + { + int j; + + ptrs[i] = (char *) calloc (1, size); + + if (ptrs[i] == NULL) + break; + + for (j = 0; j < size; ++j) + { + if (ptrs[i][j] != '\0') + error (EXIT_FAILURE, 0, + "byte not cleared (size %d, element %d, byte %d)", + size, i, j); + ptrs[i][j] = '\xff'; + } + } + + while (i-- > 0) + free (ptrs[i]); +} + + +static void +random_test (void) +{ + char *ptrs[N]; + int i; + + for (i = 0; i < N; ++i) + { + int j; + int n = 1 + random () % 10; + int elem = 1 + random () % 100; + int size = n * elem; + + ptrs[i] = (char *) calloc (n, elem); + + if (ptrs[i] == NULL) + break; + + for (j = 0; j < size; ++j) + { + if (ptrs[i][j] != '\0') + error (EXIT_FAILURE, 0, + "byte not cleared (size %d, element %d, byte %d)", + size, i, j); + ptrs[i][j] = '\xff'; + } + } + + while (i-- > 0) + free (ptrs[i]); +} + + +static void +null_test (void) +{ + /* If the size is 0 the result is implementation defined. Just make + sure the program doesn't crash. */ + calloc (0, 0); + calloc (0, UINT_MAX); + calloc (UINT_MAX, 0); + calloc (0, ~((size_t) 0)); + calloc (~((size_t) 0), 0); +} + + +static int +do_test (void) +{ + /* We are allocating blocks with `calloc' and check whether every + block is completely cleared. We first try this for some fixed + times and then with random size. */ + fixed_test (15); + fixed_test (5); + fixed_test (17); + fixed_test (6); + fixed_test (31); + fixed_test (96); + + random_test (); + + null_test (); + + return 0; +} + +#define TEST_FUNCTION do_test () +#include "../test-skeleton.c" |