memcheck/tests/linux/lsframe2.c

   1
   2 /* Demonstrate Memcheck correctly handling chain of 64 recursive
   3    calls, each of which allocates a 1 M array on the stack.  Requires
   4    --main-stacksize=67117057 (on amd64-linux) or above, but works fine
   5    if you specify that. */
   6
   7 #include <stdio.h>
   8
   9 #define N_MBYTES 64
  10
  11 #define N_INTS_PER_MBYTE (1048576 / sizeof(int))
  12
  13 int rec ( int depth )
  14 {
  15    int i, zzz;
  16    int arr[N_INTS_PER_MBYTE];
  17    if (depth == 0) return 0;
  18    for (i = 0; i < N_INTS_PER_MBYTE; i++)
  19       arr[i] = i * depth;
  20    zzz = rec(depth-1);
  21    for (i = 0; i < N_INTS_PER_MBYTE; i++)
  22        zzz += arr[i];
  23    return zzz;
  24 }
  25
  26
  27 int main ( void )
  28 {
  29    int sum;
  30    fprintf(stderr, "lsframe2: start\n");
  31    sum = rec(N_MBYTES);
  32    fprintf(stderr, "lsframe2: done, result is %d\n", sum);
  33    return 0;
  34 }