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/* $Id: alloc-1.c $ */
/** @file
* Allocate lots of memory, portable ANSI C code.
*/
/*
* Copyright (C) 2007-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <stdlib.h>
#include <stdio.h>
int main(int argc, char **argv)
{
unsigned uPct;
unsigned long cbDone;
unsigned long cMBs = 1024;
unsigned long cb;
/*
* Some quick and dirty argument parsing.
*/
if (argc == 2)
cMBs = strtoul(argv[1], 0, 0);
if (!cMBs || argc > 2)
{
printf("usage: alloc-1 [MBs]\n");
return 1;
}
cb = cMBs * 1024 * 1024;
if (cb / (1024 * 1024) != cMBs)
cb = ~(unsigned long)0 / (1024 * 1024) * (1024 * 1024);
printf("alloc-1: allocating %lu MB (%lu bytes)\n", cb/1024/1024, cb);
/*
* The allocation loop.
*/
printf("alloc-1: 0%%");
fflush(stdout);
cbDone = 0;
uPct = 0;
while (cbDone < cb)
{
unsigned uPctNow;
unsigned long cbThis = cb > 10*1024*1024 ? 10*1024*1024 : cb;
char *pb = malloc(cbThis);
if (!pb)
{
printf("\nalloc-1: calloc failed, cbDone=%lu MB (%lu bytes)\n",
cbDone/1024/1024, cbDone);
return 1;
}
cbDone += cbThis;
/* touch the memory. */
while (cbThis >= 0x1000)
{
*pb = (char)cbThis;
pb += 0x1000;
cbThis -= 0x1000;
}
/* progress */
uPctNow = 100.0 * cbDone / cb;
if (uPctNow != uPct && !(uPctNow & 1))
{
if (!(uPctNow % 10))
printf("%u%%", uPctNow);
else
printf(".");
fflush(stdout);
}
uPct = uPctNow;
}
printf("\nalloc-1: done\n");
return 0;
}
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