sos-code-article10/userland/myprog13.c

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2018-07-13 17:13:10 +02:00
/* Copyright (C) 2005 David Decotigny
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; either version 2
of the License, or (at your option) any later version.
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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
USA.
*/
#include <crt.h>
#include <libc.h>
#include <stdarg.h>
#include <debug.h>
/**
* @file myprog13.c
* Test brk (and, hence: mremap)
*/
int main(void)
{
char * zoup;
bochs_printf("myprog13: Hello world !\n");
/* Do some forks to complicate things */
fork();
fork();
zoup = _sos_brk(0);
bochs_printf("_sos_brk(0)=%x\n", (unsigned)_sos_brk(0));
bochs_printf("_sos_brk(+0)=%x\n", (unsigned)_sos_brk(zoup));
bochs_printf("_sos_brk(+1)=%x\n", (unsigned)_sos_brk(zoup + 1));
zoup[3] = 42;
bochs_printf("z[] = %d\n", zoup[3]);
bochs_printf("_sos_brk(0)=%x\n", (unsigned)_sos_brk(0));
bochs_printf("_sos_brk(orig)=%x\n", (unsigned)_sos_brk(zoup));
bochs_printf("_sos_brk(0)=%x\n", (unsigned)_sos_brk(0));
// zoup[3] = 42;
bochs_printf("brk(0)=%x\n", (unsigned)brk(0));
bochs_printf("sbrk(0)=%x\n", (unsigned)sbrk(0));
bochs_printf("brk(0)=%x\n", (unsigned)brk(0));
bochs_printf("sbrk(0)=%x\n", (unsigned)sbrk(0));
bochs_printf("sbrk(1)=%x\n", (unsigned)sbrk(1));
bochs_printf("brk(0)=%x\n", (unsigned)brk(0));
bochs_printf("sbrk(0)=%x\n", (unsigned)sbrk(0));
zoup = sbrk(0);
bochs_printf("brk(+1)=%x\n", (unsigned)brk(zoup + 1));
bochs_printf("sbrk(0)=%x\n", (unsigned)sbrk(0));
bochs_printf("brk(0)=%x\n", (unsigned)brk(0));
bochs_printf("sbrk(0)=%x\n", (unsigned)sbrk(0));
bochs_printf("sbrk(-4k)=%x\n", (unsigned)sbrk(-4096));
bochs_printf("brk(0)=%x\n", (unsigned)brk(0));
bochs_printf("sbrk(0)=%x\n", (unsigned)sbrk(0));
zoup = sbrk(0);
bochs_printf("brk(-4k)=%x\n", (unsigned)brk(zoup - 4096));
bochs_printf("brk(0)=%x\n", (unsigned)brk(0));
bochs_printf("sbrk(0)=%x\n", (unsigned)sbrk(0));
bochs_printf("malloc(0)=%x\n", (unsigned)malloc(0));
bochs_printf("malloc(1)=%x\n", (unsigned)malloc(1));
bochs_printf("malloc(2)=%x\n", (unsigned)malloc(2));
bochs_printf("malloc(3)=%x\n", (unsigned)malloc(3));
bochs_printf("malloc(4)=%x\n", (unsigned)malloc(4));
bochs_printf("malloc(5)=%x\n", (unsigned)malloc(5));
bochs_printf("malloc(6)=%x\n", (unsigned)malloc(6));
bochs_printf("malloc(7)=%x\n", (unsigned)malloc(7));
bochs_printf("malloc(8)=%x\n", (unsigned)malloc(8));
bochs_printf("malloc(9)=%x\n", (unsigned)malloc(9));
bochs_printf("malloc(0x30000)=%x\n", (unsigned)malloc(0x30000));
bochs_printf("malloc(1)=%x\n", (unsigned)malloc(1));
bochs_printf("myprog13: The end\n");
return 0;
}