BSD 4_3_Tahoe development

[unix-history] / .ref-BSD-4_3 / usr / src / undoc / brktest.c

       int     a[1000];

main()
{
       int     asize = 1000,i,inc = 0,new;

       srand(1);
       for (i = 0 ; i < asize ; i++)
               a[i] = i;
       while (1)  {
               new = rand() % 4000;
               if (((rand() % 1000) > 750) && ((asize - new) > 1000))
                       new = -new;
               for (i = 0 ;  i < asize ; i++ )
                       if (a[i] != i)
                               printf("bad a %x\n",i);
                       if (sbrk(4 * new) != -1)  {
                               if (new > 0)  {
                                       for (i = 0 ; i < new ; i++)
                                               a[asize + i] = asize + i;  }
                               asize += new;  }
                       else  {
                               new = 1000 - asize;
                               sbrk(4 * new);
                               asize += new;  }
               sleep((rand() % 4) + 1);  }
}