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Diffstat (limited to '')
-rw-r--r-- | src/VBox/ValidationKit/snippets/alloc-1.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/snippets/alloc-1.c b/src/VBox/ValidationKit/snippets/alloc-1.c new file mode 100644 index 00000000..ded4e715 --- /dev/null +++ b/src/VBox/ValidationKit/snippets/alloc-1.c @@ -0,0 +1,110 @@ +/* $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; +} |