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 #include <tls.h>
   8
   9 #define AL 4096
  10 struct foo
  11 {
  12   int i;
  13 } __attribute ((aligned (AL)));
  14
  15 static __thread struct foo f;
  16 static struct foo g;
  17
  18
  19 extern int in_dso1 (void);
  20
  21
  22 static int
  23 do_test (void)
  24 {
  25   int result = 0;
  26
  27   int fail = (((uintptr_t) &f) & (AL - 1)) != 0;
  28   printf ("&f = %p %s\n", &f, fail ? "FAIL" : "OK");
  29   result |= fail;
  30
  31   fail = (((uintptr_t) &g) & (AL - 1)) != 0;
  32   printf ("&g = %p %s\n", &g, fail ? "FAIL" : "OK");
  33   result |= fail;
  34
  35   result |= in_dso1 ();
  36
  37   void *h = dlopen ("tst-tlsmod14b.so", RTLD_LAZY);
  38   if (h == NULL)
  39     {
  40       printf ("cannot open tst-tlsmod14b.so: %m\n");
  41       exit (1);
  42     }
  43
  44   int (*fp) (void) = (int (*) (void)) dlsym (h, "in_dso2");
  45   if (fp == NULL)
  46     {
  47       puts ("cannot find in_dso2");
  48       exit (1);
  49     }
  50
  51   result |= fp ();
  52
  53   return result;
  54 }
  55
  56 #define TEST_FUNCTION do_test ()
  57 #include "../test-skeleton.c"