50 lines
761 B
C
50 lines
761 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#define N 8*1024*1024
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char tab[N];
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int main(void)
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{
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for (int i = 0; i < N; i++)
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tab[i] = (char)i;
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printf("Avant fork : tab = %p\n", (void *)tab);
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pid_t pid = fork();
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if (pid < 0) {
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perror("fork");
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exit(EXIT_FAILURE);
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}
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if (pid == 0) {
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printf("Fils : tab = %p, tab[5000] = %d\n",
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(void *)(tab+5000), tab[5000]);
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printf("FILS PID = %d\n", getpid());
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getchar();
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tab[5000] = 42;
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printf("-> modification\n");
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getchar();
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printf("Fils après modification : tab[5000] = %d\n",
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tab[5000]);
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exit(EXIT_SUCCESS);
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}
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else {
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sleep(1);
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printf("Père : tab = %p, tab[5000] = %d\n",
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(void *)tab, tab[5000]);
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wait(NULL);
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}
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return 0;
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}
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