1  /* Test RTLD_DEFAULT/RTLD_NEXT when the definition has multiple versions.
       2     Copyright (C) 2018-2023 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 <stdio.h>
      21  
      22  #include "testobj.h"
      23  
      24  static int
      25  do_test (void)
      26  {
      27    /* Resolve to foo@@v3 in nextmod3.so, instead of
      28       foo@v1 or foo@v2.  */
      29    int (*fp) (int) = dlsym (RTLD_DEFAULT, "foo");
      30    int res = fp (0);
      31    printf ("preload (0) = %d, %s\n", res, res == 3 ? "ok" : "wrong");
      32    if (res != 3)
      33      return 1;
      34  
      35    /* Resolve to foo@@v3 in nextmod3.so, instead of
      36       foo@v1 or foo@v2.  */
      37    fp = dlsym (RTLD_NEXT, "foo");
      38    res = fp (0);
      39    printf ("preload (0) = %d, %s\n", res, res == 3 ? "ok" : "wrong");
      40    if (res != 3)
      41      return 1;
      42  
      43    return 0;
      44  }
      45  
      46  #include <support/test-driver.c>