Testing if mallinfo.uordblks includes mmaped memory

uordblks-test.c

#include <stdio.h>
#include <malloc.h>

int main(int argc, char** argv)
{
    struct mallinfo mi;
    mi = mallinfo();

    printf("BEFORE:\nuordblks:%d\nhblkhd:%d\n\n", mi.uordblks, mi.hblkhd);
    malloc_stats();
    printf("\n\nDOING malloc\n\n");
    char* a = malloc( 256 << 20 ); // Ask for 256MB

    mi = mallinfo();
    printf("AFTER:\nuordblks:%d\nhblkhd:%d\n\n", mi.uordblks, mi.hblkhd);
    malloc_stats();

    a[0] = 'a';
    return 0;
}