elf/tst-tls3.c

   1 /* glibc test for TLS in ld.so.  */
   2 #include <stdio.h>
   3
   4
   5 __thread int foo, bar __attribute__ ((tls_model("initial-exec")));
   6 __thread int baz __attribute__ ((tls_model("local-exec")));
   7 extern __thread int foo_gd __attribute__ ((alias("foo"), tls_model("global-dynamic")));
   8 extern __thread int bar_gd __attribute__ ((alias("bar"), tls_model("global-dynamic")));
   9 extern __thread int baz_ld __attribute__ ((alias("baz"), tls_model("local-dynamic")));
  10
  11
  12 extern int in_dso (void);
  13
  14
  15 static int
  16 do_test (void)
  17 {
  18   int result = 0;
  19   int *ap, *bp, *cp;
  20
  21
  22   /* Set the variable using the local exec model.  */
  23   puts ("set baz to 3 (LE)");
  24   baz = 3;
  25
  26
  27   /* Get variables using initial exec model.  */
  28   puts ("set variables foo and bar (IE)");
  29   foo = 1;
  30   bar = 2;
  31
  32
  33   /* Get variables using local dynamic model.  */
  34   fputs ("get sum of foo, bar (GD) and baz (LD)", stdout);
  35   ap = &foo_gd;
  36   bp = &bar_gd;
  37   cp = &baz_ld;
  38   printf (" = %d\n", *ap + *bp + *cp);
  39   result |= *ap + *bp + *cp != 6;
  40   if (*ap != 1)
  41     {
  42       printf ("foo = %d\n", *ap);
  43       result = 1;
  44     }
  45   if (*bp != 2)
  46     {
  47       printf ("bar = %d\n", *bp);
  48       result = 1;
  49     }
  50   if (*cp != 3)
  51     {
  52       printf ("baz = %d\n", *cp);
  53       result = 1;
  54     }
  55
  56
  57   result |= in_dso ();
  58
  59   return result;
  60 }
  61
  62
  63 #include <support/test-driver.c>