dlfcn/tst-dladdr.c

   1 /* Test for dladdr.
   2    Copyright (C) 2000-2016 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Volkmar Sieh <vs@caldera.de> and Andreas Jaeger <aj@suse.de>.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <dlfcn.h>
  21 #include <errno.h>
  22 #include <error.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include <ldsodefs.h>
  28
  29
  30 #define TEST_FUNCTION do_test ()
  31 extern int do_test (void);
  32
  33 int
  34 do_test (void)
  35 {
  36   void *handle;
  37   int (*sym) (void); /* We load ref1 from glreflib1.c.  */
  38   Dl_info info;
  39   int ret;
  40
  41
  42   handle = dlopen ("glreflib1.so", RTLD_NOW);
  43   if (handle == NULL)
  44     error (EXIT_FAILURE, 0, "cannot load: glreflib1.so");
  45
  46   sym = dlsym (handle, "ref1");
  47   if (sym == NULL)
  48     error (EXIT_FAILURE, 0, "dlsym failed");
  49
  50   memset (&info, 0, sizeof (info));
  51   ret = dladdr (sym, &info);
  52
  53   if (ret == 0)
  54     error (EXIT_FAILURE, 0, "dladdr failed");
  55
  56   printf ("address of ref1 = %lx\n",
  57           (unsigned long int)  DL_LOOKUP_ADDRESS (sym));
  58   printf ("ret = %d\n", ret);
  59   printf ("info.dli_fname = %p (\"%s\")\n", info.dli_fname, info.dli_fname);
  60   printf ("info.dli_fbase = %p\n", info.dli_fbase);
  61   printf ("info.dli_sname = %p (\"%s\")\n", info.dli_sname, info.dli_sname);
  62   printf ("info.dli_saddr = %p\n", info.dli_saddr);
  63
  64   if (info.dli_fname == NULL)
  65     error (EXIT_FAILURE, 0, "dli_fname is NULL");
  66   if (info.dli_fbase == NULL)
  67     error (EXIT_FAILURE, 0, "dli_fbase is NULL");
  68   if (info.dli_sname == NULL)
  69     error (EXIT_FAILURE, 0, "dli_sname is NULL");
  70   if (info.dli_saddr == NULL)
  71     error (EXIT_FAILURE, 0, "dli_saddr is NULL");
  72
  73   dlclose (handle);
  74
  75   return 0;
  76 }
  77
  78
  79 #include "../test-skeleton.c"