elf/tst-tls14.c

   1 /* Check alignment of TLS variable.  */
   2 #include <dlfcn.h>
   3 #include <stdint.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6
   7 #define AL 4096
   8 struct foo
   9 {
  10   int i;
  11 } __attribute ((aligned (AL)));
  12
  13 static __thread struct foo f;
  14 static struct foo g;
  15
  16
  17 extern int in_dso1 (void);
  18
  19
  20 static int
  21 do_test (void)
  22 {
  23   int result = 0;
  24
  25   int fail = (((uintptr_t) &f) & (AL - 1)) != 0;
  26   printf ("&f = %p %s\n", &f, fail ? "FAIL" : "OK");
  27   result |= fail;
  28
  29   fail = (((uintptr_t) &g) & (AL - 1)) != 0;
  30   printf ("&g = %p %s\n", &g, fail ? "FAIL" : "OK");
  31   result |= fail;
  32
  33   result |= in_dso1 ();
  34
  35   void *h = dlopen ("tst-tlsmod14b.so", RTLD_LAZY);
  36   if (h == NULL)
  37     {
  38       printf ("cannot open tst-tlsmod14b.so: %m\n");
  39       exit (1);
  40     }
  41
  42   int (*fp) (void) = (int (*) (void)) dlsym (h, "in_dso2");
  43   if (fp == NULL)
  44     {
  45       puts ("cannot find in_dso2");
  46       exit (1);
  47     }
  48
  49   result |= fp ();
  50
  51   return result;
  52 }
  53
  54 #include <support/test-driver.c>