dlfcn/tst-dladdr.c

   1 /* Test for dladdr.
   2    Copyright (C) 2000-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <dlfcn.h>
  20 #include <errno.h>
  21 #include <error.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26
  27 #define TEST_FUNCTION do_test ()
  28 extern int do_test (void);
  29
  30 int
  31 do_test (void)
  32 {
  33   void *handle;
  34   int (*sym) (void); /* We load ref1 from glreflib1.c.  */
  35   Dl_info info;
  36   int ret;
  37
  38
  39   handle = dlopen ("glreflib1.so", RTLD_NOW);
  40   if (handle == NULL)
  41     error (EXIT_FAILURE, 0, "cannot load: glreflib1.so");
  42
  43   sym = dlsym (handle, "ref1");
  44   if (sym == NULL)
  45     error (EXIT_FAILURE, 0, "dlsym failed");
  46
  47   memset (&info, 0, sizeof (info));
  48   ret = dladdr (sym, &info);
  49
  50   if (ret == 0)
  51     error (EXIT_FAILURE, 0, "dladdr failed");
  52
  53   printf ("ret = %d\n", ret);
  54   printf ("info.dli_fname = %p (\"%s\")\n", info.dli_fname, info.dli_fname);
  55   printf ("info.dli_fbase = %p\n", info.dli_fbase);
  56   printf ("info.dli_sname = %p (\"%s\")\n", info.dli_sname, info.dli_sname);
  57   printf ("info.dli_saddr = %p\n", info.dli_saddr);
  58
  59   if (info.dli_fname == NULL)
  60     error (EXIT_FAILURE, 0, "dli_fname is NULL");
  61   if (info.dli_fbase == NULL)
  62     error (EXIT_FAILURE, 0, "dli_fbase is NULL");
  63   if (info.dli_sname == NULL)
  64     error (EXIT_FAILURE, 0, "dli_sname is NULL");
  65   if (info.dli_saddr == NULL)
  66     error (EXIT_FAILURE, 0, "dli_saddr is NULL");
  67
  68   dlclose (handle);
  69
  70   return 0;
  71 }
  72
  73
  74 #include "../test-skeleton.c"