stdlib/tst-tls-atexit-lib.c

   1 /* Verify that DSO is unloaded only if its TLS objects are destroyed - the DSO.
   2    Copyright (C) 2013-2022 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 <stdlib.h>
  20 #include <dso_handle.h>
  21
  22 typedef struct
  23 {
  24   void *val;
  25 } A;
  26
  27 /* We only care about the destructor.  */
  28 void A_dtor (void *obj)
  29 {
  30   ((A *)obj)->val = obj;
  31 }
  32
  33 void reg_dtor (void)
  34 {
  35   static __thread A b;
  36   __cxa_thread_atexit_impl (A_dtor, &b, __dso_handle);
  37 }