Update.
[glibc.git] / malloc / tst-calloc.c
blob371cfeb11a0c636316a6a27c3c0900be02a56d6f
1 /* Copyright (C) 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #include <errno.h>
21 #include <error.h>
22 #include <malloc.h>
23 #include <stdlib.h>
24 #include <stdio.h>
27 /* Number of samples per size. */
28 #define N 50000
31 static void
32 fixed_test (int size)
34 char *ptrs[N];
35 int i;
37 for (i = 0; i < N; ++i)
39 int j;
41 ptrs[i] = (char *) calloc (1, size);
43 if (ptrs[i] == NULL)
44 break;
46 for (j = 0; j < size; ++j)
48 if (ptrs[i][j] != '\0')
49 error (EXIT_FAILURE, 0,
50 "byte not cleared (size %d, element %d, byte %d)",
51 size, i, j);
52 ptrs[i][j] = '\xff';
56 while (i-- > 0)
57 free (ptrs[i]);
61 static void
62 random_test (void)
64 char *ptrs[N];
65 int i;
67 for (i = 0; i < N; ++i)
69 int j;
70 int n = 1 + random () % 10;
71 int elem = 1 + random () % 100;
72 int size = n * elem;
74 ptrs[i] = (char *) calloc (n, elem);
76 if (ptrs[i] == NULL)
77 break;
79 for (j = 0; j < size; ++j)
81 if (ptrs[i][j] != '\0')
82 error (EXIT_FAILURE, 0,
83 "byte not cleared (size %d, element %d, byte %d)",
84 size, i, j);
85 ptrs[i][j] = '\xff';
89 while (i-- > 0)
90 free (ptrs[i]);
94 int
95 main (void)
97 /* We are allocating blocks with `calloc' and check whether every
98 block is completely cleared. We first try this for some fixed
99 times and then with random size. */
100 fixed_test (15);
101 fixed_test (5);
102 fixed_test (17);
103 fixed_test (6);
104 fixed_test (31);
105 fixed_test (96);
107 random_test ();
109 return 0;