VirtualBox

source: vbox/trunk/src/VBox/ValidationKit/snippets/alloc-1.c

Last change on this file was 106061, checked in by vboxsync, 3 months ago

Copyright year updates by scm.

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1/* $Id: alloc-1.c 106061 2024-09-16 14:03:52Z vboxsync $ */
2/** @file
3 * Allocate lots of memory, portable ANSI C code.
4 */
5
6/*
7 * Copyright (C) 2007-2024 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * The contents of this file may alternatively be used under the terms
26 * of the Common Development and Distribution License Version 1.0
27 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28 * in the VirtualBox distribution, in which case the provisions of the
29 * CDDL are applicable instead of those of the GPL.
30 *
31 * You may elect to license modified versions of this file under the
32 * terms and conditions of either the GPL or the CDDL or both.
33 *
34 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35 */
36
37
38/*********************************************************************************************************************************
39* Header Files *
40*********************************************************************************************************************************/
41#include <stdlib.h>
42#include <stdio.h>
43
44
45int main(int argc, char **argv)
46{
47 unsigned uPct;
48 unsigned long cbDone;
49 unsigned long cMBs = 1024;
50 unsigned long cb;
51
52 /*
53 * Some quick and dirty argument parsing.
54 */
55 if (argc == 2)
56 cMBs = strtoul(argv[1], 0, 0);
57 if (!cMBs || argc > 2)
58 {
59 printf("usage: alloc-1 [MBs]\n");
60 return 1;
61 }
62 cb = cMBs * 1024 * 1024;
63 if (cb / (1024 * 1024) != cMBs)
64 cb = ~(unsigned long)0 / (1024 * 1024) * (1024 * 1024);
65 printf("alloc-1: allocating %lu MB (%lu bytes)\n", cb/1024/1024, cb);
66
67 /*
68 * The allocation loop.
69 */
70 printf("alloc-1: 0%%");
71 fflush(stdout);
72 cbDone = 0;
73 uPct = 0;
74 while (cbDone < cb)
75 {
76 unsigned uPctNow;
77 unsigned long cbThis = cb > 10*1024*1024 ? 10*1024*1024 : cb;
78 char *pb = malloc(cbThis);
79 if (!pb)
80 {
81 printf("\nalloc-1: calloc failed, cbDone=%lu MB (%lu bytes)\n",
82 cbDone/1024/1024, cbDone);
83 return 1;
84 }
85 cbDone += cbThis;
86
87 /* touch the memory. */
88 while (cbThis >= 0x1000)
89 {
90 *pb = (char)cbThis;
91 pb += 0x1000;
92 cbThis -= 0x1000;
93 }
94
95 /* progress */
96 uPctNow = 100.0 * cbDone / cb;
97 if (uPctNow != uPct && !(uPctNow & 1))
98 {
99 if (!(uPctNow % 10))
100 printf("%u%%", uPctNow);
101 else
102 printf(".");
103 fflush(stdout);
104 }
105 uPct = uPctNow;
106 }
107
108 printf("\nalloc-1: done\n");
109 return 0;
110}
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