88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/* Copyright (C) 2005 David Decotigny
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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USA.
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*/
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#include <libc.h>
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#include <stdarg.h>
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#include <debug.h>
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static unsigned rien[16384];
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/**
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* @file myprog7.c
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* Tests forks and make sure that private mappings (eg the '.data'
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* section of the program object file) are really private
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*/
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static void assign(unsigned * addr, const unsigned val)
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{
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bochs_printf("[0x%x]=0x%x <- 0x%x\n", (unsigned)addr, *addr, val);
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*addr = val;
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bochs_printf(" ===> 0x%x\n", *addr);
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}
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int main(void)
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{
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int i, level;
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bochs_printf("myprog7: Hello\n");
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assign(& rien[0], 0x42);
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assign(& rien[1000], 0x42);
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level = 0;
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for (i = 0 ; i < 10 ; i++)
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{
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pid_t fork_status;
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fork_status = fork();
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if (fork_status == 0)
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{
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level ++;
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bochs_printf("myprog7: I am the child %d %d\n", level, i);
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assign(& rien[0], 0x0f<<24 | (level << 8) | i);
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assign(& rien[1000], 0x0a<<24 | (level << 8) | i);
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if ((i % 2) == 0)
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{
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char strprog[20];
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snprintf(strprog, sizeof(strprog), "myprog%d", i/2 + 1);
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exec(strprog);
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}
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}
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else if (fork_status > 0)
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{
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bochs_printf("myprog7: I am the father %d %d\n", level, i);
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assign(& rien[0], 0x8f<<24 | (level << 8) | i);
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assign(& rien[1000], 0x8a<<24 | (level << 8) | i);
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}
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else
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bochs_printf("myprog7: fork error %d !\n", fork_status);
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}
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bochs_printf("myprog7: The end %d %d\n", level, i);
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assign(& rien[0], 0xff<<24 | (level << 8) | i);
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assign(& rien[1000], 0xfa<<24 | (level << 8) | i);
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return 0;
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}
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