massif/tests/pages_as_heap.c

   1 #include <stdio.h>
   2 #include <unistd.h>
   3
   4 #define MAX 20000
   5
   6 int main () {
   7   int i;
   8   int inc_dec;
   9   int delta;
  10   intptr_t brk_stat;
  11
  12   // loop to first increase, then decrease
  13   for (inc_dec = 1; inc_dec >= -1; inc_dec-=2) {
  14      // loop to increase(decrease) with small then big delta
  15      for (delta = 1; delta <= 400; delta+=399) {
  16         if (0) printf("initial brk value for inc_dec %d delta %d: %p\n",
  17                inc_dec, delta, sbrk(0));
  18         for (i=0; i<MAX; i++) {
  19            brk_stat = (intptr_t)brk(sbrk(0) + inc_dec * delta);
  20            if (brk_stat == -1) {
  21               printf("brk value at failure: %p\n", sbrk(0));
  22               perror ("brk() failed!\n");
  23               return 0;
  24            }
  25         }
  26         if (0) printf("resulting brk value for inc_dec %d delta %d: %p\n",
  27                inc_dec, delta, sbrk(0));
  28      }
  29   }
  30
  31   return 0;
  32 }