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glibc/stdlib/exit.c
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/* Copyright (C) 1991-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <unistd.h> | |
#include <sysdep.h> | |
#include "exit.h" | |
#include "set-hooks.h" | |
DEFINE_HOOK (__libc_atexit, (void)) | |
/* Call all functions registered with `atexit' and `on_exit', | |
in the reverse of the order in which they were registered | |
perform stdio cleanup, and terminate program execution with STATUS. */ | |
void | |
attribute_hidden | |
__run_exit_handlers (int status, struct exit_function_list **listp, | |
bool run_list_atexit) | |
{ | |
/* First, call the TLS destructors. */ | |
#ifndef SHARED | |
if (&__call_tls_dtors != NULL) | |
#endif | |
__call_tls_dtors (); | |
/* We do it this way to handle recursive calls to exit () made by | |
the functions registered with `atexit' and `on_exit'. We call | |
everyone on the list and use the status value in the last | |
exit (). */ | |
while (*listp != NULL) | |
{ | |
struct exit_function_list *cur = *listp; | |
while (cur->idx > 0) | |
{ | |
const struct exit_function *const f = | |
&cur->fns[--cur->idx]; | |
switch (f->flavor) | |
{ | |
void (*atfct) (void); | |
void (*onfct) (int status, void *arg); | |
void (*cxafct) (void *arg, int status); | |
case ef_free: | |
case ef_us: | |
break; | |
case ef_on: | |
onfct = f->func.on.fn; | |
#ifdef PTR_DEMANGLE | |
PTR_DEMANGLE (onfct); | |
#endif | |
onfct (status, f->func.on.arg); | |
break; | |
case ef_at: | |
atfct = f->func.at; | |
#ifdef PTR_DEMANGLE | |
PTR_DEMANGLE (atfct); | |
#endif | |
atfct (); | |
break; | |
case ef_cxa: | |
cxafct = f->func.cxa.fn; | |
#ifdef PTR_DEMANGLE | |
PTR_DEMANGLE (cxafct); | |
#endif | |
cxafct (f->func.cxa.arg, status); | |
break; | |
} | |
} | |
*listp = cur->next; | |
if (*listp != NULL) | |
/* Don't free the last element in the chain, this is the statically | |
allocate element. */ | |
free (cur); | |
} | |
if (run_list_atexit) | |
RUN_HOOK (__libc_atexit, ()); | |
_exit (status); | |
} | |
void | |
exit (int status) | |
{ | |
__run_exit_handlers (status, &__exit_funcs, true); | |
} | |
libc_hidden_def (exit) |