1  #include <stdio.h>
       2  
       3  
       4  __thread int foo;
       5  
       6  
       7  int
       8  in_dso (int n, int *caller_foop)
       9  {
      10    int *foop;
      11    int result = 0;
      12  
      13    puts ("foo");			/* Make sure PLT is used before macros.  */
      14    asm ("" ::: "memory");
      15  
      16    foop = &foo;
      17  
      18    if (caller_foop != NULL && foop != caller_foop)
      19      {
      20        printf ("callers address of foo differs: %p vs %p\n", caller_foop, foop);
      21        result = 1;
      22      }
      23    else if (*foop != n)
      24      {
      25        printf ("foo != %d\n", n);
      26        result = 1;
      27      }
      28  
      29    *foop = 16;
      30  
      31    return result;
      32  }