massif/tests/ignored.c

   1 #include <stdlib.h>
   2
   3 // All sizes are divisible by 16 -- no slop.
   4
   5 int* ignore1(void)
   6 {
   7    // Allocating/freeing in an ignored function: ignored.
   8    int* ignored_x1 = malloc(400);
   9    int* ignored_x2 = malloc(400);
  10    free(ignored_x2);
  11    return ignored_x1;
  12 }
  13
  14 void ignore2(int* x, int* ignored_x)
  15 {
  16    // Growing/shrinking a non-ignored block in an ignored function: ignored.
  17    x = realloc(x, 800);
  18    x = realloc(x, 400);
  19
  20    // Growing/shrinking an ignored block in an ignored function: ignored.
  21    ignored_x = realloc(ignored_x, 800);
  22    ignored_x = realloc(ignored_x, 400);
  23 }
  24
  25 int main(void)
  26 {
  27    int* x;
  28    int* ignored_x;
  29
  30    // Not ignored.
  31    x = malloc(400);
  32
  33    // Get an ignored block.
  34    ignored_x = ignore1();
  35
  36    // Growing/shrinking a non-ignored block in a non-ignored function:
  37    // not ignored.
  38    x = realloc(x, 800);
  39    x = realloc(x, 400);
  40
  41    // Growing/shrinking an ignored block in a non-ignored function: ignored.
  42    ignored_x = realloc(ignored_x, 800);
  43    ignored_x = realloc(ignored_x, 400);
  44
  45    ignore2(x, ignored_x);
  46
  47    x = realloc(ignored_x, 0);    // equivalent to 'free(ignored_x)'.
  48
  49    return 0;
  50 }
  51