elf/tst-dlclose-lazy-mod2.c

   1 /* Lazy binding during dlclose.  Indirectly loaded module.
   2    Copyright (C) 2023-2024 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 <stdio.h>
  20 #include <stdlib.h>
  21
  22 void
  23 exported_function (int ignored)
  24 {
  25   /* This function is interposed from tst-dlclose-lazy-mod1.so and
  26      thus never called.  */
  27   abort ();
  28 }
  29
  30 static void __attribute__ ((constructor))
  31 init (void)
  32 {
  33   puts ("info: tst-dlclose-lazy-mod2.so constructor called");
  34
  35   /* Trigger lazy binding to the definition in
  36      tst-dlclose-lazy-mod1.so, but not for
  37      lazily_bound_exported_function in that module.  */
  38   exported_function (0);
  39 }
  40
  41 static void __attribute__ ((destructor))
  42 fini (void)
  43 {
  44   puts ("info: tst-dlclose-lazy-mod2.so destructor called");
  45
  46   /* Trigger the lazily_bound_exported_function call in
  47      exported_function in tst-dlclose-lazy-mod1.so.  */
  48   exported_function (1);
  49 }