stdlib/quick_exit.c

   1 /* Copyright (C) 2009-2020 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <unistd.h>
  21 #include <sysdep.h>
  22 #include <signal.h>
  23 #include <errno.h>
  24 #include <shlib-compat.h>
  25 #include "exit.h"
  26
  27 void
  28 __new_quick_exit (int status)
  29 {
  30   /* The new quick_exit, following C++11 18.5.12, does not run object
  31      destructors.   While C11 says nothing about object destructors,
  32      since it has none, the intent is to run the registered
  33      at_quick_exit handlers and then run _Exit immediately without
  34      disturbing the state of the process and threads.  */
  35   __run_exit_handlers (status, &__quick_exit_funcs, false, false);
  36 }
  37 versioned_symbol (libc, __new_quick_exit, quick_exit, GLIBC_2_24);
  38
  39 #if SHLIB_COMPAT(libc, GLIBC_2_10, GLIBC_2_24)
  40 void
  41 attribute_compat_text_section
  42 __old_quick_exit (int status)
  43 {
  44   /* The old quick_exit runs thread_local destructors.  */
  45   __run_exit_handlers (status, &__quick_exit_funcs, false, true);
  46 }
  47 compat_symbol (libc, __old_quick_exit, quick_exit, GLIBC_2_10);
  48 #endif