vm-data3.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/* This is creating a program that has
 * a few more text pages than the average
 * program we usually have.
 */

extern void     call_all();
void write_data(void);
void read_data(void);

#define PAGE_SIZE (4096)
#define PAGES     (128)
#define SIZE      (PAGE_SIZE * PAGES / sizeof(int))
#define NUM_REFS  (2)

unsigned int array[SIZE];

void
write_data(void)
{
        unsigned int refs = 0;
        unsigned int i = 0;

        for (refs = 0; refs < NUM_REFS-1; refs++) {
                for (i=0; i<SIZE; i+= PAGE_SIZE) {
                        array[i] = i;
                }
        }
}

void
read_data(void)
{
        unsigned int i = 0;

        for (i=0; i<SIZE; i+= PAGE_SIZE) {
                if (array[i] != i) {
                        printf("FAILED array[%d] = %u != %d\n", i, array[i], i);
                        exit(1);
                }
        }
}


int
main()
{
        unsigned int i = 0;

        for (i=0; i<5; i++) {
          call_all();
          write_data();
          call_all();
          read_data();
        }

        printf("SUCCEEDED\n");
        exit(0);
}