elf/tst-dlmopen-dlerror-mod.c

   1 /* Check that dlfcn errors are reported properly after dlmopen.  Test module.
   2    Copyright (C) 2021-2023 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <dlfcn.h>
  20 #include <stddef.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <support/check.h>
  24
  25 /* Note: This object is not linked into the main program, so we cannot
  26    use delayed test failure reporting via TEST_VERIFY etc., and have
  27    to use FAIL_EXIT1 (or something else that calls exit).  */
  28
  29 void
  30 call_dlsym (const char *name)
  31 {
  32   void *ptr = dlsym (NULL, name);
  33   if (ptr != NULL)
  34     FAIL_EXIT1 ("dlsym did not fail as expected for: %s", name);
  35   const char *message = dlerror ();
  36   if (strstr (message, ": undefined symbol: does not exist X") == NULL)
  37     FAIL_EXIT1 ("invalid dlsym error message for [[%s]]: %s", name, message);
  38   message = dlerror ();
  39   if (message != NULL)
  40     FAIL_EXIT1 ("second dlsym for [[%s]]: %s", name, message);
  41 }
  42
  43 void
  44 call_dlopen (const char *name)
  45 {
  46   void *handle = dlopen (name, RTLD_NOW);
  47   if (handle != NULL)
  48     FAIL_EXIT1 ("dlopen did not fail as expected for: %s", name);
  49   const char *message = dlerror ();
  50   if (strstr (message, "X: cannot open shared object file:"
  51               " No such file or directory") == NULL
  52       && strstr (message, "X: cannot open shared object file:"
  53                  " File name too long") == NULL)
  54     FAIL_EXIT1 ("invalid dlopen error message for [[%s]]: %s", name, message);
  55   message = dlerror ();
  56   if (message != NULL)
  57     FAIL_EXIT1 ("second dlopen for [[%s]]: %s", name, message);
  58 }