test/tls/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 #if USE_TLS && HAVE___THREAD
  10
  11 #define AL 4096
  12 struct foo
  13 {
  14   int i;
  15 } __attribute ((aligned (AL)));
  16
  17 static __thread struct foo f;
  18 static struct foo g;
  19
  20
  21 extern int in_dso1 (void);
  22
  23
  24 static int
  25 do_test (void)
  26 {
  27   int result = 0;
  28
  29   int fail = (((uintptr_t) &f) & (AL - 1)) != 0;
  30   printf ("&f = %p %s\n", &f, fail ? "FAIL" : "OK");
  31   result |= fail;
  32
  33   fail = (((uintptr_t) &g) & (AL - 1)) != 0;
  34   printf ("&g = %p %s\n", &g, fail ? "FAIL" : "OK");
  35   result |= fail;
  36
  37   result |= in_dso1 ();
  38
  39   void *h = dlopen ("tst-tlsmod14b.so", RTLD_LAZY);
  40   if (h == NULL)
  41     {
  42       printf ("cannot open tst-tlsmod14b.so: %m\n");
  43       exit (1);
  44     }
  45
  46   int (*fp) (void) = (int (*) (void)) dlsym (h, "in_dso2");
  47   if (fp == NULL)
  48     {
  49       puts ("cannot find in_dso2");
  50       exit (1);
  51     }
  52
  53   result |= fp ();
  54
  55   return result;
  56 }
  57
  58 #define TEST_FUNCTION do_test ()
  59
  60 #else
  61
  62 #define TEST_FUNCTION 0
  63
  64 #endif
  65
  66 #include "../test-skeleton.c"