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d12cb8e452
The functions serve very similar purposes. The advantage of __rtld_libc_freeres is that it is located within ld.so, so it is more natural to poke at link map internals there. This slightly regresses cleanup capabilities for statically linked binaries. If that becomes a problem, we should start calling __rtld_libc_freeres from __libc_freeres (perhaps after renaming it).
243 lines
9.5 KiB
C
243 lines
9.5 KiB
C
/* Copyright (C) 1997-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <array_length.h>
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#include <atomic.h>
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#include <stdlib.h>
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#include <libc-internal.h>
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#include <unwind-link.h>
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#include <ldsodefs.h>
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#include <set-freeres.h>
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#include <set-freeres-system.h>
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#ifndef SHARED
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# pragma weak __nss_module_freeres
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# pragma weak __nss_action_freeres
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# pragma weak __nss_database_freeres
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# pragma weak __hdestroy
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# pragma weak __gconv_cache_freemem
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# pragma weak __gconv_conf_freemem
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# pragma weak __gconv_db_freemem
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# pragma weak __gconv_dl_freemem
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# pragma weak __intl_freemem
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# pragma weak __libio_freemem
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# pragma weak __libc_fstab_freemem
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#ifdef USE_NSCD
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# pragma weak __nscd_gr_map_freemem
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# pragma weak __nscd_hst_map_freemem
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# pragma weak __nscd_pw_map_freemem
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# pragma weak __nscd_serv_map_freemem
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# pragma weak __nscd_group_map_freemem
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#endif
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# pragma weak __libc_regcomp_freemem
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# pragma weak __libc_atfork_freemem
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# pragma weak __res_thread_freeres
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# pragma weak __libc_resolv_conf_freemem
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# pragma weak __libc_printf_freemem
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# pragma weak __libc_fmtmsg_freemem
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# pragma weak __libc_setenv_freemem
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# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_31)
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# pragma weak __rpc_freemem
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# pragma weak __rpc_thread_destroy
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# endif
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# pragma weak __libc_getaddrinfo_freemem
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# pragma weak __libc_tzset_freemem
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# pragma weak __libc_localealias_freemem
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# pragma weak __gai_freemem
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# pragma weak __aio_freemem
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# pragma weak __libpthread_freeres
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# pragma weak __libc_dlerror_result_free
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# pragma weak __check_pf_freemem
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# pragma weak __libc_fgetgrent_freemem_ptr
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# pragma weak __libc_fgetsgent_freeres_ptr
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# pragma weak __libc_getnetgrent_freemem_ptr
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# pragma weak __libc_rcmd_freemem_ptr
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# pragma weak __libc_rexec_freemem_ptr
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# pragma weak __libc_mntent_freemem_ptr
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# pragma weak __libc_fgetpwent_freemem_ptr
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# pragma weak __libc_getspent_freemem_ptr
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# pragma weak __libc_resolv_res_hconf_freemem_ptr
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# pragma weak __libc_fgetspent_freemem_ptr
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# pragma weak __libc_tzfile_freemem_ptr
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# pragma weak __libc_getnameinfo_freemem_ptr
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# pragma weak __libc_getutent_freemem_ptr
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# pragma weak __libc_getutid_freemem_ptr
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# pragma weak __libc_getutline_freemem_ptr
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# pragma weak __libc_reg_printf_freemem_ptr
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# pragma weak __libc_reg_type_freemem_ptr
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# pragma weak __libc_getgrgid_freemem_ptr
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# pragma weak __libc_getgrnam_freemem_ptr
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# pragma weak __libc_getpwnam_freemem_ptr
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# pragma weak __libc_getpwuid_freemem_ptr
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# pragma weak __libc_getspnam_freemem_ptr
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# pragma weak __libc_getaliasbyname_freemem_ptr
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# pragma weak __libc_gethostbyaddr_freemem_ptr
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# pragma weak __libc_gethostbyname_freemem_ptr
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# pragma weak __libc_gethostbyname2_freemem_ptr
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# pragma weak __libc_getnetbyaddr_freemem_ptr
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# pragma weak __libc_getnetbyname_freemem_ptr
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# pragma weak __libc_getprotobynumber_freemem_ptr
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# pragma weak __libc_getprotobyname_freemem_ptr
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# pragma weak __libc_getrpcbyname_freemem_ptr
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# pragma weak __libc_getrpcbynumber_freemem_ptr
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# pragma weak __libc_getservbyname_freemem_ptr
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# pragma weak __libc_getservbyport_freemem_ptr
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# pragma weak __libc_getgrent_freemem_ptr
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# pragma weak __libc_getpwent_freemem_ptr
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# pragma weak __libc_getaliasent_freemem_ptr
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# pragma weak __libc_gethostent_freemem_ptr
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# pragma weak __libc_getnetent_freemem_ptr
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# pragma weak __libc_getprotoent_freemem_ptr
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# pragma weak __libc_getrpcent_freemem_ptr
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# pragma weak __libc_getservent_freemem_ptr
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# pragma weak __libc_efgcvt_freemem_ptr
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# pragma weak __libc_qefgcvt_freemem_ptr
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# pragma weak __libc_qefgcvt_freemem_ptr
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# pragma weak __ttyname_freemem_ptr
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#endif
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#ifdef SHARED
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# define call_free_static_weak(__ptr) \
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free (__ptr)
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#else
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# define call_free_static_weak(__ptr) \
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if (&__ptr != NULL) \
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free (__ptr);
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#endif
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void
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__libc_freeres (void)
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{
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/* This function might be called from different places. So better
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protect for multiple executions since these are fatal. */
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static long int already_called;
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if (!atomic_compare_and_exchange_bool_acq (&already_called, 1, 0))
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{
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call_function_static_weak (__nss_module_freeres);
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call_function_static_weak (__nss_action_freeres);
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call_function_static_weak (__nss_database_freeres);
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_IO_cleanup ();
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/* We run the resource freeing after IO cleanup. */
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call_function_static_weak (__hdestroy);
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call_function_static_weak (__gconv_cache_freemem);
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call_function_static_weak (__gconv_conf_freemem);
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call_function_static_weak (__gconv_db_freemem);
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call_function_static_weak (__gconv_dl_freemem);
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call_function_static_weak (__intl_freemem);
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call_function_static_weak (__libio_freemem);
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call_function_static_weak (__libc_fstab_freemem);
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#ifdef USE_NSCD
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call_function_static_weak (__nscd_gr_map_freemem);
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call_function_static_weak (__nscd_hst_map_freemem);
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call_function_static_weak (__nscd_pw_map_freemem);
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call_function_static_weak (__nscd_serv_map_freemem);
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call_function_static_weak (__nscd_group_map_freemem);
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#endif
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call_function_static_weak (__libc_regcomp_freemem);
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call_function_static_weak (__libc_atfork_freemem);
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/* __res_thread_freeres deallocates the per-thread resolv_context);
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which in turn drop the reference count of the current global object.
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So it need to be before __libc_resolv_conf_freemem. */
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call_function_static_weak (__res_thread_freeres);
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call_function_static_weak (__libc_resolv_conf_freemem);
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call_function_static_weak (__libc_printf_freemem);
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call_function_static_weak (__libc_fmtmsg_freemem);
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call_function_static_weak (__libc_setenv_freemem);
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#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_31)
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call_function_static_weak (__rpc_freemem);
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call_function_static_weak (__rpc_thread_destroy);
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#endif
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call_function_static_weak (__libc_getaddrinfo_freemem);
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call_function_static_weak (__libc_tzset_freemem);
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call_function_static_weak (__libc_localealias_freemem);
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#if PTHREAD_IN_LIBC
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call_function_static_weak (__gai_freemem);
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call_function_static_weak (__aio_freemem);
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#endif
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call_function_static_weak (__libpthread_freeres);
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#ifdef SHARED
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__libc_unwind_link_freeres ();
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#endif
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call_function_static_weak (__libc_dlerror_result_free);
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#ifdef SHARED
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GLRO (dl_libc_freeres) ();
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#endif
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call_free_static_weak (__libc_fgetgrent_freemem_ptr);
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call_free_static_weak (__libc_fgetsgent_freeres_ptr);
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call_free_static_weak (__libc_getnetgrent_freemem_ptr);
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call_free_static_weak (__libc_rcmd_freemem_ptr);
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call_free_static_weak (__libc_rexec_freemem_ptr);
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call_free_static_weak (__libc_mntent_freemem_ptr);
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call_free_static_weak (__libc_fgetpwent_freemem_ptr);
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call_free_static_weak (__libc_resolv_res_hconf_freemem_ptr);
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call_free_static_weak (__libc_fgetspent_freemem_ptr);
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call_free_static_weak (__libc_tzfile_freemem_ptr);
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call_free_static_weak (__libc_getnameinfo_freemem_ptr);
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call_free_static_weak (__libc_getutent_freemem_ptr);
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call_free_static_weak (__libc_getutid_freemem_ptr);
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call_free_static_weak (__libc_getutline_freemem_ptr);
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call_free_static_weak (__libc_reg_printf_freemem_ptr);
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call_free_static_weak (__libc_reg_type_freemem_ptr);
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call_free_static_weak (__libc_getgrgid_freemem_ptr);
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call_free_static_weak (__libc_getgrnam_freemem_ptr);
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call_free_static_weak (__libc_getpwnam_freemem_ptr);
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call_free_static_weak (__libc_getpwuid_freemem_ptr);
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call_free_static_weak (__libc_getspnam_freemem_ptr);
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call_free_static_weak (__libc_getaliasbyname_freemem_ptr);
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call_free_static_weak (__libc_gethostbyaddr_freemem_ptr);
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call_free_static_weak (__libc_gethostbyname_freemem_ptr);
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call_free_static_weak (__libc_gethostbyname2_freemem_ptr);
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call_free_static_weak (__libc_getnetbyaddr_freemem_ptr);
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call_free_static_weak (__libc_getnetbyname_freemem_ptr);
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call_free_static_weak (__libc_getprotobynumber_freemem_ptr);
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call_free_static_weak (__libc_getprotobyname_freemem_ptr);
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call_free_static_weak (__libc_getrpcbyname_freemem_ptr);
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call_free_static_weak (__libc_getrpcbynumber_freemem_ptr);
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call_free_static_weak (__libc_getservbyname_freemem_ptr);
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call_free_static_weak (__libc_getservbyport_freemem_ptr);
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call_free_static_weak (__libc_getgrent_freemem_ptr);
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call_free_static_weak (__libc_getpwent_freemem_ptr);
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call_free_static_weak (__libc_getspent_freemem_ptr);
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call_free_static_weak (__libc_getaliasent_freemem_ptr);
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call_free_static_weak (__libc_gethostent_freemem_ptr);
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call_free_static_weak (__libc_getnetent_freemem_ptr);
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call_free_static_weak (__libc_getprotoent_freemem_ptr);
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call_free_static_weak (__libc_getrpcent_freemem_ptr);
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call_free_static_weak (__libc_getservent_freemem_ptr);
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call_free_static_weak (__libc_efgcvt_freemem_ptr);
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call_free_static_weak (__libc_qefgcvt_freemem_ptr);
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call_freeres_system_funcs;
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}
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}
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libc_hidden_def (__libc_freeres)
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