elf/tst-audit2.c

   1 /* Test case for early TLS initialization in dynamic linker.  */
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6
   7 #define MAGIC1 0xabcdef72
   8 #define MAGIC2 0xd8675309
   9 static __thread unsigned int magic[] = { MAGIC1, MAGIC2 };
  10
  11 #undef calloc
  12
  13 /* This calloc definition will be called by the dynamic linker itself.
  14    We test that it has initialized our TLS block by the time it does so.  */
  15
  16 void *
  17 calloc (size_t n, size_t m)
  18 {
  19   if (magic[0] != MAGIC1 || magic[1] != MAGIC2)
  20     {
  21       printf ("{%x, %x} != {%x, %x}\n", magic[0], magic[1], MAGIC1, MAGIC2);
  22       abort ();
  23     }
  24   magic[0] = MAGIC2;
  25   magic[1] = MAGIC1;
  26
  27   n *= m;
  28   void *ptr = malloc (n);
  29   if (ptr != NULL)
  30     memset (ptr, '\0', n);
  31   return ptr;
  32 }
  33
  34 int
  35 main (void)
  36 {
  37   if (magic[1] != MAGIC1 || magic[0] != MAGIC2)
  38     {
  39       printf ("{%x, %x} != {%x, %x}\n", magic[0], magic[1], MAGIC2, MAGIC1);
  40       return 1;
  41     }
  42
  43   return 0;
  44 }