[v4,1/4] Move libc_freeres_ptrs and libc_subfreeres to hidden/weak functions

Message ID 20230306160920.2942970-2-adhemerval.zanella@linaro.org
State Superseded
Headers
Series Remove --with-default-link option |

Checks

Context Check Description
dj/TryBot-apply_patch success Patch applied to master at the time it was sent

Commit Message

Adhemerval Zanella Netto March 6, 2023, 4:09 p.m. UTC
  From: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>

They are both used by __libc_freeres to free all library malloc
allocated resources to help tooling like mtrace or valgrind with
memory leak tracking.

The current scheme uses assembly markers and linker script entries
to consolidate the free routine function pointers in the RELRO segment
and to be freed buffers in BSS.

This patch changes it to use specific free functions for
libc_freeres_ptrs buffers and call the function pointer array directly
with call_function_static_weak.

It allows the removal of both the internal macros and the linker
script sections.

Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
---
 Makerules                                     |   7 -
 crypt/md5-crypt.c                             |   7 +-
 crypt/sha256-crypt.c                          |   7 +-
 crypt/sha512-crypt.c                          |   7 +-
 dlfcn/dlerror.h                               |   1 -
 elf/dl-libc.c                                 |   5 +-
 grp/fgetgrent.c                               |   5 +-
 gshadow/fgetsgent.c                           |   5 +-
 iconv/gconv_cache.c                           |   3 +-
 iconv/gconv_conf.c                            |   3 +-
 iconv/gconv_db.c                              |   6 +-
 iconv/gconv_dl.c                              |   5 +-
 include/libc-symbols.h                        |  73 --------
 include/set-freeres.h                         | 142 ++++++++++++++++
 inet/getnameinfo.c                            |   5 +-
 inet/getnetgrent.c                            |   5 +-
 inet/rcmd.c                                   |   5 +-
 inet/rexec.c                                  |   5 +-
 intl/dcigettext.c                             |   3 +-
 intl/finddomain.c                             |   2 +-
 intl/loadmsgcat.c                             |   1 -
 intl/localealias.c                            |  15 +-
 libio/fcloseall.c                             |   1 +
 libio/genops.c                                |   8 +-
 libio/libioP.h                                |   1 -
 locale/loadarchive.c                          |   2 +-
 locale/localeinfo.h                           |   4 +-
 locale/setlocale.c                            |   4 +-
 login/getutent.c                              |   5 +-
 login/getutid.c                               |   6 +-
 login/getutline.c                             |   5 +-
 malloc/set-freeres.c                          | 156 +++++++++++++++---
 malloc/thread-freeres.c                       |   9 +-
 misc/efgcvt-template.c                        |   5 +-
 misc/efgcvt.c                                 |   1 +
 misc/fstab.c                                  |   3 +-
 misc/hsearch.c                                |   4 -
 misc/mntent.c                                 |   5 +-
 misc/qefgcvt.c                                |   1 +
 misc/unwind-link.c                            |   2 +-
 nptl/nptlfreeres.c                            |   1 -
 nscd/nscd_getgr_r.c                           |   3 +-
 nscd/nscd_gethst_r.c                          |   3 +-
 nscd/nscd_getpw_r.c                           |   3 +-
 nscd/nscd_getserv_r.c                         |   3 +-
 nscd/nscd_netgroup.c                          |   3 +-
 nss/getXXbyYY.c                               |   7 +-
 nss/getXXent.c                                |   7 +-
 nss/nss_action.c                              |   2 +-
 nss/nss_action.h                              |   3 -
 nss/nss_database.c                            |   2 +-
 nss/nss_database.h                            |   3 -
 nss/nss_module.c                              |   2 +-
 nss/nss_module.h                              |   3 -
 posix/regcomp.c                               |   3 +-
 posix/register-atfork.c                       |   3 +-
 pwd/fgetpwent.c                               |   5 +-
 resolv/gai_misc.c                             |   6 +-
 resolv/res-close.c                            |   2 -
 resolv/res_hconf.c                            |  16 +-
 resolv/resolv-internal.h                      |  14 ++
 resolv/resolv_conf.c                          |   3 +-
 resolv/tst-leaks2.c                           |   2 +
 rt/aio_misc.c                                 |   6 +-
 shadow/fgetspent.c                            |   5 +-
 stdio-common/reg-modifier.c                   |   3 +-
 stdio-common/reg-printf.c                     |   6 +-
 stdio-common/reg-type.c                       |   6 +-
 stdlib/exit.c                                 |   2 +-
 stdlib/fmtmsg.c                               |   3 +-
 stdlib/setenv.c                               |   3 +-
 sunrpc/clnt_perr.c                            |   4 +-
 sunrpc/rpc_thread.c                           |   1 -
 sunrpc/tst-svc_register.c                     |   6 +-
 sysdeps/generic/set-freeres-fp.h              |  19 +++
 sysdeps/generic/set-freeres-os.h              |  19 +++
 sysdeps/generic/set-freeres-system.h          |  27 +++
 .../ldbl-128ibm-compat/ieee128-qefgcvt.c      |   1 +
 .../ldbl-128ibm-compat/set-freeres-fp.h       |  22 +++
 sysdeps/mach/hurd/bits/errno.h                |   1 -
 sysdeps/posix/getaddrinfo.c                   |   5 +-
 sysdeps/posix/ttyname.c                       |   4 +-
 sysdeps/unix/sysv/linux/check_pf.c            |   3 +-
 .../unix/sysv/linux/s390/s390-32/getutent.c   |   1 +
 .../unix/sysv/linux/s390/s390-32/getutid.c    |   1 +
 .../unix/sysv/linux/s390/s390-32/getutline.c  |   1 +
 sysdeps/unix/sysv/linux/set-freeres-os.h      |  24 +++
 sysdeps/unix/sysv/linux/ttyname.c             |   8 +-
 time/tzfile.c                                 |   5 +-
 time/tzset.c                                  |   3 +-
 90 files changed, 584 insertions(+), 243 deletions(-)
 create mode 100644 include/set-freeres.h
 create mode 100644 sysdeps/generic/set-freeres-fp.h
 create mode 100644 sysdeps/generic/set-freeres-os.h
 create mode 100644 sysdeps/generic/set-freeres-system.h
 create mode 100644 sysdeps/ieee754/ldbl-128ibm-compat/set-freeres-fp.h
 create mode 100644 sysdeps/unix/sysv/linux/set-freeres-os.h
  

Patch

diff --git a/Makerules b/Makerules
index fae6b626e6..f6071eab50 100644
--- a/Makerules
+++ b/Makerules
@@ -560,14 +560,7 @@  $(common-objpfx)shlib.lds: $(common-objpfx)config.make $(..)Makerules
 		  -Wl,--verbose 2>/dev/null | \
 	  sed > $@T \
 	      -e '/^=========/,/^=========/!d;/^=========/d' \
-	      -e 's/^.*\*(\.dynbss).*$$/& \
-		 PROVIDE(__start___libc_freeres_ptrs = .); \
-		 *(__libc_freeres_ptrs) \
-		 PROVIDE(__stop___libc_freeres_ptrs = .);/'\
 	      -e 's@^.*\*(\.jcr).*$$@& \
-		 PROVIDE(__start___libc_subfreeres = .);\
-		 __libc_subfreeres : { *(__libc_subfreeres) }\
-		 PROVIDE(__stop___libc_subfreeres = .);\
 		 PROVIDE(__start___libc_IO_vtables = .);\
 		 __libc_IO_vtables : { *(__libc_IO_vtables) }\
 		 PROVIDE(__stop___libc_IO_vtables = .);\
diff --git a/crypt/md5-crypt.c b/crypt/md5-crypt.c
index 0cc597a7f2..4e4760545a 100644
--- a/crypt/md5-crypt.c
+++ b/crypt/md5-crypt.c
@@ -299,10 +299,7 @@  __md5_crypt_r (const char *key, const char *salt, char *buffer, int buflen)
   return buffer;
 }
 
-#ifndef _LIBC
-# define libc_freeres_ptr(decl) decl
-#endif
-libc_freeres_ptr (static char *buffer);
+static char *buffer;
 
 char *
 __md5_crypt (const char *key, const char *salt)
@@ -326,11 +323,9 @@  __md5_crypt (const char *key, const char *salt)
   return __md5_crypt_r (key, salt, buffer, buflen);
 }
 
-#ifndef _LIBC
 static void
 __attribute__ ((__destructor__))
 free_mem (void)
 {
   free (buffer);
 }
-#endif
diff --git a/crypt/sha256-crypt.c b/crypt/sha256-crypt.c
index 1ef16af80f..e90eb590bb 100644
--- a/crypt/sha256-crypt.c
+++ b/crypt/sha256-crypt.c
@@ -386,10 +386,7 @@  __sha256_crypt_r (const char *key, const char *salt, char *buffer, int buflen)
   return buffer;
 }
 
-#ifndef _LIBC
-# define libc_freeres_ptr(decl) decl
-#endif
-libc_freeres_ptr (static char *buffer);
+static char *buffer;
 
 /* This entry point is equivalent to the `crypt' function in Unix
    libcs.  */
@@ -418,11 +415,9 @@  __sha256_crypt (const char *key, const char *salt)
   return __sha256_crypt_r (key, salt, buffer, buflen);
 }
 
-#ifndef _LIBC
 static void
 __attribute__ ((__destructor__))
 free_mem (void)
 {
   free (buffer);
 }
-#endif
diff --git a/crypt/sha512-crypt.c b/crypt/sha512-crypt.c
index b592eb0976..d9c0de14d2 100644
--- a/crypt/sha512-crypt.c
+++ b/crypt/sha512-crypt.c
@@ -408,10 +408,7 @@  __sha512_crypt_r (const char *key, const char *salt, char *buffer, int buflen)
   return buffer;
 }
 
-#ifndef _LIBC
-# define libc_freeres_ptr(decl) decl
-#endif
-libc_freeres_ptr (static char *buffer);
+static char *buffer;
 
 /* This entry point is equivalent to the `crypt' function in Unix
    libcs.  */
@@ -440,11 +437,9 @@  __sha512_crypt (const char *key, const char *salt)
   return __sha512_crypt_r (key, salt, buffer, buflen);
 }
 
-#ifndef _LIBC
 static void
 __attribute__ ((__destructor__))
 free_mem (void)
 {
   free (buffer);
 }
-#endif
diff --git a/dlfcn/dlerror.h b/dlfcn/dlerror.h
index 999b9f26ae..c6697728a9 100644
--- a/dlfcn/dlerror.h
+++ b/dlfcn/dlerror.h
@@ -87,6 +87,5 @@  static struct dl_action_result *const dl_action_result_malloc_failed
    reporting via dlerror.  */
 extern __thread struct dl_action_result *__libc_dlerror_result
   attribute_tls_model_ie;
-void __libc_dlerror_result_free (void) attribute_hidden;
 
 #endif /* _DLERROR_H */
diff --git a/elf/dl-libc.c b/elf/dl-libc.c
index 7e71bfb534..c12e52f330 100644
--- a/elf/dl-libc.c
+++ b/elf/dl-libc.c
@@ -228,7 +228,7 @@  __libc_dlclose (void *map)
 }
 
 
-static bool __libc_freeres_fn_section
+static bool
 free_slotinfo (struct dtv_slotinfo_list **elemp)
 {
   size_t cnt;
@@ -256,7 +256,8 @@  free_slotinfo (struct dtv_slotinfo_list **elemp)
 }
 
 
-libc_freeres_fn (free_mem)
+void
+__dl_libc_freemem (void)
 {
   struct link_map *l;
   struct r_search_path_elem *d;
diff --git a/grp/fgetgrent.c b/grp/fgetgrent.c
index d6ee2db656..2e7c7fe5fb 100644
--- a/grp/fgetgrent.c
+++ b/grp/fgetgrent.c
@@ -20,12 +20,13 @@ 
 #include <libc-lock.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <set-freeres.h>
 
 
 /* We need to protect the dynamic buffer handling.  */
 __libc_lock_define_initialized (static, lock);
 
-libc_freeres_ptr (static char *buffer);
+static char *buffer;
 
 /* Read one entry from the given stream.  */
 struct group *
@@ -82,3 +83,5 @@  fgetgrent (FILE *stream)
 
   return result;
 }
+
+weak_alias (buffer, __libc_fgetgrent_freemem_ptr)
diff --git a/gshadow/fgetsgent.c b/gshadow/fgetsgent.c
index 68e69ef6f2..dc26b24b47 100644
--- a/gshadow/fgetsgent.c
+++ b/gshadow/fgetsgent.c
@@ -20,6 +20,7 @@ 
 #include <gshadow.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <set-freeres.h>
 
 
 /* A reasonable size for a buffer to start with.  */
@@ -28,7 +29,7 @@ 
 /* We need to protect the dynamic buffer handling.  */
 __libc_lock_define_initialized (static, lock);
 
-libc_freeres_ptr (static char *buffer);
+static char *buffer;
 
 /* Read one shadow entry from the given stream.  */
 struct sgrp *
@@ -85,3 +86,5 @@  fgetsgent (FILE *stream)
 
   return result;
 }
+
+weak_alias (buffer, __libc_fgetsgent_freeres_ptr);
diff --git a/iconv/gconv_cache.c b/iconv/gconv_cache.c
index c13fc5ef96..f2100ca88f 100644
--- a/iconv/gconv_cache.c
+++ b/iconv/gconv_cache.c
@@ -449,7 +449,8 @@  __gconv_release_cache (struct __gconv_step *steps, size_t nsteps)
 
 
 /* Free all resources if necessary.  */
-libc_freeres_fn (free_mem)
+void
+__gconv_cache_freemem (void)
 {
   if (cache_malloced)
     free (gconv_cache);
diff --git a/iconv/gconv_conf.c b/iconv/gconv_conf.c
index a75ac13e3f..c76011d6bc 100644
--- a/iconv/gconv_conf.c
+++ b/iconv/gconv_conf.c
@@ -530,7 +530,8 @@  __gconv_load_conf (void)
 
 
 /* Free all resources if necessary.  */
-libc_freeres_fn (free_mem)
+void
+__gconv_conf_freemem (void)
 {
   if (__gconv_path_elem != NULL && __gconv_path_elem != &empty_path_elem)
     free ((void *) __gconv_path_elem);
diff --git a/iconv/gconv_db.c b/iconv/gconv_db.c
index e9b1c07620..0ee8076287 100644
--- a/iconv/gconv_db.c
+++ b/iconv/gconv_db.c
@@ -169,7 +169,7 @@  add_derivation (const char *fromset, const char *toset,
      not all memory will be freed.  */
 }
 
-static void __libc_freeres_fn_section
+static void
 free_derivation (void *p)
 {
   struct known_derivation *deriv = (struct known_derivation *) p;
@@ -793,7 +793,6 @@  __gconv_close_transform (struct __gconv_step *steps, size_t nsteps)
 
 /* Free the modules mentioned.  */
 static void
-__libc_freeres_fn_section
 free_modules_db (struct gconv_module *node)
 {
   if (node->left != NULL)
@@ -812,7 +811,8 @@  free_modules_db (struct gconv_module *node)
 
 
 /* Free all resources if necessary.  */
-libc_freeres_fn (free_mem)
+void
+__gconv_db_freemem (void)
 {
   /* First free locale memory.  This needs to be done before freeing
      derivations, as ctype cleanup functions dereference steps arrays which we
diff --git a/iconv/gconv_dl.c b/iconv/gconv_dl.c
index 911c2031f0..cb51568e4c 100644
--- a/iconv/gconv_dl.c
+++ b/iconv/gconv_dl.c
@@ -184,7 +184,7 @@  __gconv_release_shlib (struct __gconv_loaded_object *handle)
 
 
 /* We run this if we debug the memory allocation.  */
-static void __libc_freeres_fn_section
+static void
 do_release_all (void *nodep)
 {
   struct __gconv_loaded_object *obj = (struct __gconv_loaded_object *) nodep;
@@ -196,7 +196,8 @@  do_release_all (void *nodep)
   free (obj);
 }
 
-libc_freeres_fn (free_mem)
+void
+__gconv_dl_freemem (void)
 {
   __tdestroy (loaded, do_release_all);
   loaded = NULL;
diff --git a/include/libc-symbols.h b/include/libc-symbols.h
index 404169ce78..155781d448 100644
--- a/include/libc-symbols.h
+++ b/include/libc-symbols.h
@@ -237,79 +237,6 @@  requires at runtime the shared libraries from the glibc version used \
 for linking")
 #endif
 
-/* Resource Freeing Hooks:
-
-   Normally a process exits and the OS cleans up any allocated
-   memory.  However, when tooling like mtrace or valgrind is monitoring
-   the process we need to free all resources that are part of the
-   process in order to provide the consistency required to track
-   memory leaks.
-
-   A single public API exists and is __libc_freeres(), and this is used
-   by applications like valgrind to freee resouces.
-
-   There are 3 cases:
-
-   (a) __libc_freeres
-
-	In this case all you need to do is define the freeing routine:
-
-	foo.c:
-	libfoo_freeres_fn (foo_freeres)
-	{
-	  complex_free (mem);
-	}
-
-	This ensures the function is called at the right point to free
-	resources.
-
-   (b) __libc_freeres_ptr
-
-	The framework for (a) iterates over the list of pointers-to-free
-	in (b) and frees them.
-
-	foo.c:
-	libc_freeres_ptr (static char *foo_buffer);
-
-	Freeing these resources alaways happens last and is equivalent
-	to registering a function that does 'free (foo_buffer)'.
-
-   (c) Explicit lists of free routines to call or objects to free.
-
-	It is the intended goal to remove (a) and (b) which have some
-	non-determinism based on link order, and instead use explicit
-	lists of functions and frees to resolve cleanup ordering issues
-	and make it easy to debug and maintain.
-
-	As of today the following subsystems use (c):
-
-	Per-thread cleanup:
-	* malloc/thread-freeres.c
-
-	libdl cleanup:
-	* dlfcn/dlfreeres.c
-
-	libpthread cleanup:
-	* nptl/nptlfreeres.c
-
-	So if you need any shutdown routines to run you should add them
-	directly to the appropriate subsystem's shutdown list.  */
-
-/* Resource pointers to free in libc.so.  */
-#define libc_freeres_ptr(decl) \
-  __make_section_unallocated ("__libc_freeres_ptrs, \"aw\", %nobits") \
-  decl __attribute__ ((section ("__libc_freeres_ptrs" __sec_comment)))
-
-/* Resource freeing functions from libc.so go in this section.  */
-#define __libc_freeres_fn_section \
-  __attribute__ ((__used__, section ("__libc_freeres_fn")))
-
-/* Resource freeing functions for libc.so.  */
-#define libc_freeres_fn(name) \
-  static void name (void) __attribute_used__ __libc_freeres_fn_section;	\
-  text_set_element (__libc_subfreeres, name);				\
-  static void name (void)
-
 /* Declare SYMBOL to be TYPE (`function' or `object') of SIZE bytes
    alias to ORIGINAL, when the assembler supports such declarations
    (such as in ELF).
diff --git a/include/set-freeres.h b/include/set-freeres.h
new file mode 100644
index 0000000000..b7f66519a3
--- /dev/null
+++ b/include/set-freeres.h
@@ -0,0 +1,142 @@ 
+/* Macros for internal resource Freeing Hooks.
+   Copyright (C) 2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _SET_FREERES_H
+#define _SET_FREERES_H 1
+
+#include <shlib-compat.h>
+#include <printf.h>
+#include <time.h>
+#include <resolv/resolv-internal.h>
+
+/* Resource Freeing Hooks:
+
+   Normally a process exits and the OS cleans up any allocated
+   memory.  However, when tooling like mtrace or valgrind is monitoring
+   the process we need to free all resources that are part of the
+   process in order to provide the consistency required to track
+   memory leaks.
+
+   A single public API exists and is __libc_freeres, and this is used
+   by applications like valgrind to freee resouces.
+
+   Each free routines must be explicit listed below.  */
+
+/* From libc.so.  */
+extern void __dl_libc_freemem (void) attribute_hidden;
+extern void __hdestroy (void) attribute_hidden;
+extern void __gconv_cache_freemem (void) attribute_hidden;
+extern void __gconv_conf_freemem (void) attribute_hidden;
+extern void __gconv_db_freemem (void) attribute_hidden;
+extern void __gconv_dl_freemem (void) attribute_hidden;
+extern void __intl_freemem (void) attribute_hidden;
+extern void __libio_freemem (void) attribute_hidden;
+extern void __libc_fstab_freemem (void) attribute_hidden;
+extern void __nscd_gr_map_freemem (void) attribute_hidden;
+extern void __nscd_hst_map_freemem (void) attribute_hidden;
+extern void __nscd_pw_map_freemem (void) attribute_hidden;
+extern void __nscd_serv_map_freemem (void) attribute_hidden;
+extern void __nscd_group_map_freemem (void) attribute_hidden;
+extern void __libc_regcomp_freemem (void) attribute_hidden;
+extern void __libc_atfork_freemem (void) attribute_hidden;
+extern void __libc_resolv_conf_freemem (void) attribute_hidden;
+extern void __res_thread_freeres (void) attribute_hidden;
+extern void __libc_printf_freemem (void) attribute_hidden;
+extern void __libc_fmtmsg_freemem (void) attribute_hidden;
+extern void __libc_setenv_freemem (void) attribute_hidden;
+#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_31)
+extern void __rpc_freemem (void) attribute_hidden;
+extern void __rpc_thread_destroy (void) attribute_hidden;
+#endif
+extern void __libc_getaddrinfo_freemem (void) attribute_hidden;
+extern void __libc_tzset_freemem (void) attribute_hidden;
+extern void __libc_localealias_freemem (void) attribute_hidden;
+extern void __libc_getutent_freemem (void) attribute_hidden;
+extern void __libc_getutline_freemem (void) attribute_hidden;
+/* From nss/nss_module.c */
+extern void __nss_module_freeres (void) attribute_hidden;
+/* From nss/nss_action.c */
+extern void __nss_action_freeres (void) attribute_hidden;
+/* From nss/nss_database.c */
+extern void __nss_database_freeres (void) attribute_hidden;
+/* From libio/genops.c */
+extern int _IO_cleanup (void) attribute_hidden;;
+/* From dlfcn/dlerror.c */
+extern void __libc_dlerror_result_free (void) attribute_hidden;
+
+/* From either libc.so or libpthread.so  */
+extern void __libpthread_freeres (void) attribute_hidden;
+/* From either libc.so or libanl.so  */
+#if PTHREAD_IN_LIBC
+extern void __gai_freemem (void) attribute_hidden;
+/* From either libc.so or librt.so  */
+extern void __aio_freemem (void) attribute_hidden;
+#endif
+
+/* From libc.so  */
+extern char * __libc_fgetgrent_freemem_ptr attribute_hidden;
+extern char * __libc_fgetsgent_freeres_ptr attribute_hidden;
+extern char * __libc_getnetgrent_freemem_ptr attribute_hidden;
+extern char * __libc_rcmd_freemem_ptr attribute_hidden;
+extern char * __libc_rexec_freemem_ptr attribute_hidden;
+extern void * __libc_mntent_freemem_ptr attribute_hidden;
+extern char * __libc_fgetpwent_freemem_ptr attribute_hidden;
+extern struct netaddr * __libc_resolv_res_hconf_freemem_ptr attribute_hidden;
+extern char * __libc_fgetspent_freemem_ptr attribute_hidden;
+extern __time64_t * __libc_tzfile_freemem_ptr attribute_hidden;
+extern char * __libc_getnameinfo_freemem_ptr attribute_hidden;
+extern struct utmp * __libc_getutent_freemem_ptr attribute_hidden;
+extern struct utmp * __libc_getutid_freemem_ptr attribute_hidden;
+extern struct utmp * __libc_getutline_freemem_ptr attribute_hidden;
+extern printf_arginfo_size_function ** __libc_reg_printf_freemem_ptr
+    attribute_hidden;
+extern printf_va_arg_function ** __libc_reg_type_freemem_ptr
+    attribute_hidden;
+/* From nss/getXXbyYY.c  */
+extern char * __libc_getgrgid_freemem_ptr attribute_hidden;
+extern char * __libc_getgrnam_freemem_ptr attribute_hidden;
+extern char * __libc_getpwnam_freemem_ptr attribute_hidden;
+extern char * __libc_getpwuid_freemem_ptr attribute_hidden;
+extern char * __libc_getspnam_freemem_ptr attribute_hidden;
+extern char * __libc_getaliasbyname_freemem_ptr attribute_hidden;
+extern char * __libc_gethostbyaddr_freemem_ptr attribute_hidden;
+extern char * __libc_gethostbyname_freemem_ptr attribute_hidden;
+extern char * __libc_gethostbyname2_freemem_ptr attribute_hidden;
+extern char * __libc_getnetbyaddr_freemem_ptr attribute_hidden;
+extern char * __libc_getnetbyname_freemem_ptr attribute_hidden;
+extern char * __libc_getprotobynumber_freemem_ptr attribute_hidden;
+extern char * __libc_getprotobyname_freemem_ptr attribute_hidden;
+extern char * __libc_getrpcbyname_freemem_ptr attribute_hidden;
+extern char * __libc_getrpcbynumber_freemem_ptr attribute_hidden;
+extern char * __libc_getservbyname_freemem_ptr attribute_hidden;
+extern char * __libc_getservbyport_freemem_ptr attribute_hidden;
+/* From nss/getXXent.c */
+extern char * __libc_getgrent_freemem_ptr attribute_hidden;
+extern char * __libc_getpwent_freemem_ptr attribute_hidden;
+extern char * __libc_getspent_freemem_ptr attribute_hidden;
+extern char * __libc_getaliasent_freemem_ptr attribute_hidden;
+extern char * __libc_gethostent_freemem_ptr attribute_hidden;
+extern char * __libc_getnetent_freemem_ptr attribute_hidden;
+extern char * __libc_getprotoent_freemem_ptr attribute_hidden;
+extern char * __libc_getrpcent_freemem_ptr attribute_hidden;
+extern char * __libc_getservent_freemem_ptr attribute_hidden;
+/* From misc/efgcvt-template.c  */
+extern char * __libc_efgcvt_freemem_ptr attribute_hidden;
+extern char * __libc_qefgcvt_freemem_ptr attribute_hidden;
+
+#endif
diff --git a/inet/getnameinfo.c b/inet/getnameinfo.c
index 5c07b748bc..40c20b4be6 100644
--- a/inet/getnameinfo.c
+++ b/inet/getnameinfo.c
@@ -72,12 +72,13 @@  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <libc-lock.h>
 #include <scratch_buffer.h>
 #include <net-internal.h>
+#include <set-freeres.h>
 
 #ifndef min
 # define min(x,y) (((x) > (y)) ? (y) : (x))
 #endif /* min */
 
-libc_freeres_ptr (static char *domain);
+static char *domain;
 
 /* Former NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES flags,
    now ignored.  */
@@ -556,3 +557,5 @@  getnameinfo (const struct sockaddr *sa, socklen_t addrlen, char *host,
   return 0;
 }
 libc_hidden_def (getnameinfo)
+
+weak_alias (domain, __libc_getnameinfo_freemem_ptr)
diff --git a/inet/getnetgrent.c b/inet/getnetgrent.c
index 0b689e0ab0..a7c83740a0 100644
--- a/inet/getnetgrent.c
+++ b/inet/getnetgrent.c
@@ -19,9 +19,10 @@ 
 #include <netdb.h>
 #include <stdlib.h>
 #include <libc-lock.h>
+#include <set-freeres.h>
 
 /* Static buffer for return value.  We allocate it when needed.  */
-libc_freeres_ptr (static char *buffer);
+static char *buffer;
 /* All three strings should fit in a block of 1kB size.  */
 #define BUFSIZE 1024
 
@@ -47,3 +48,5 @@  getnetgrent (char **hostp, char **userp, char **domainp)
 
   return __getnetgrent_r (hostp, userp, domainp, buffer, BUFSIZE);
 }
+
+weak_alias (buffer, __libc_getnetgrent_freemem_ptr)
diff --git a/inet/rcmd.c b/inet/rcmd.c
index 2b95fa11d8..ad8a894907 100644
--- a/inet/rcmd.c
+++ b/inet/rcmd.c
@@ -80,6 +80,7 @@ 
 #include <sys/uio.h>
 #include <sigsetops.h>
 #include <shlib-compat.h>
+#include <set-freeres.h>
 
 
 int __ivaliduser (FILE *, uint32_t, const char *, const char *);
@@ -98,7 +99,7 @@  int iruserok (uint32_t raddr, int superuser, const char *ruser,
 
 libc_hidden_proto (iruserok_af)
 
-libc_freeres_ptr(static char *ahostbuf);
+static char *ahostbuf;
 
 int
 rcmd_af (char **ahost, u_short rport, const char *locuser, const char *remuser,
@@ -817,3 +818,5 @@  __validuser2_sa (FILE *hostf, struct sockaddr *ra, size_t ralen,
 
     return retval;
 }
+
+weak_alias (ahostbuf, __libc_rcmd_freemem_ptr)
diff --git a/inet/rexec.c b/inet/rexec.c
index c647b7ac34..1985fa4418 100644
--- a/inet/rexec.c
+++ b/inet/rexec.c
@@ -40,9 +40,10 @@ 
 #include <string.h>
 #include <unistd.h>
 #include <sys/uio.h>
+#include <set-freeres.h>
 
 int	rexecoptions;
-libc_freeres_ptr (static char *ahostbuf);
+static char *ahostbuf;
 
 int
 rexec_af (char **ahost, int rport, const char *name, const char *pass,
@@ -196,3 +197,5 @@  rexec (char **ahost, int rport, const char *name, const char *pass,
 {
 	return rexec_af(ahost, rport, name, pass, cmd, fd2p, AF_INET);
 }
+
+weak_alias (ahostbuf, __libc_rexec_freemem_ptr)
diff --git a/intl/dcigettext.c b/intl/dcigettext.c
index 64de9d511a..7886ac9545 100644
--- a/intl/dcigettext.c
+++ b/intl/dcigettext.c
@@ -1667,7 +1667,8 @@  mempcpy (void *dest, const void *src, size_t n)
 #ifdef _LIBC
 /* If we want to free all resources we have to do some work at
    program's end.  */
-libc_freeres_fn (free_mem)
+void
+__intl_freemem (void)
 {
   void *old;
 
diff --git a/intl/finddomain.c b/intl/finddomain.c
index 5f2508b2ae..6a8b239a97 100644
--- a/intl/finddomain.c
+++ b/intl/finddomain.c
@@ -185,7 +185,7 @@  out:
 #ifdef _LIBC
 /* This is called from iconv/gconv_db.c's free_mem, as locales must
    be freed before freeing gconv steps arrays.  */
-void __libc_freeres_fn_section
+void
 _nl_finddomain_subfreeres (void)
 {
   struct loaded_l10nfile *runp = _nl_loaded_domains;
diff --git a/intl/loadmsgcat.c b/intl/loadmsgcat.c
index 992489758c..94a362f923 100644
--- a/intl/loadmsgcat.c
+++ b/intl/loadmsgcat.c
@@ -1284,7 +1284,6 @@  _nl_load_domain (struct loaded_l10nfile *domain_file,
 
 #ifdef _LIBC
 void
-__libc_freeres_fn_section
 _nl_unload_domain (struct loaded_domain *domain)
 {
   size_t i;
diff --git a/intl/localealias.c b/intl/localealias.c
index 42e4569b0a..ea4f48b594 100644
--- a/intl/localealias.c
+++ b/intl/localealias.c
@@ -126,14 +126,10 @@  struct alias_map
 };
 
 
-#ifndef _LIBC
-# define libc_freeres_ptr(decl) decl
-#endif
-
-libc_freeres_ptr (static char *string_space);
+static char *string_space;
 static size_t string_space_act;
 static size_t string_space_max;
-libc_freeres_ptr (static struct alias_map *map);
+static struct alias_map *map;
 static size_t nmap;
 static size_t maxmap;
 
@@ -439,3 +435,10 @@  alias_compare (const struct alias_map *map1, const struct alias_map *map2)
   return c1 - c2;
 #endif
 }
+
+void
+__libc_localealias_freemem (void)
+{
+  free (string_space);
+  free (map);
+}
diff --git a/libio/fcloseall.c b/libio/fcloseall.c
index e1e06d497b..415da65c76 100644
--- a/libio/fcloseall.c
+++ b/libio/fcloseall.c
@@ -26,6 +26,7 @@ 
 
 #include "libioP.h"
 #include <stdio.h>
+#include <set-freeres.h>
 
 int
 __fcloseall (void)
diff --git a/libio/genops.c b/libio/genops.c
index 7c45052aa2..7131312704 100644
--- a/libio/genops.c
+++ b/libio/genops.c
@@ -765,8 +765,8 @@  weak_alias (_IO_flush_all_linebuffered, _flushlbf)
    actual buffer because this will happen anyway once the program
    terminated.  If we do want to look for memory leaks we have to free
    the buffers.  Whether something is freed is determined by the
-   function sin the libc_freeres section.  Those are called as part of
-   the atexit routine, just like _IO_cleanup.  The problem is we do
+   function called by __libc_freeres (those are not called as part of
+   the atexit routine, different from  _IO_cleanup).  The problem is we do
    not know whether the freeres code is called first or _IO_cleanup.
    if the former is the case, we set the DEALLOC_BUFFER variable to
    true and _IO_unbuffer_all will take care of the rest.  If
@@ -844,8 +844,8 @@  _IO_unbuffer_all (void)
 #endif
 }
 
-
-libc_freeres_fn (buffer_free)
+void
+__libio_freemem (void)
 {
   dealloc_buffers = true;
 
diff --git a/libio/libioP.h b/libio/libioP.h
index 38507388fd..80941b763f 100644
--- a/libio/libioP.h
+++ b/libio/libioP.h
@@ -491,7 +491,6 @@  libc_hidden_proto (_IO_wdo_write)
 extern int _IO_flush_all_lockp (int);
 extern int _IO_flush_all (void);
 libc_hidden_proto (_IO_flush_all)
-extern int _IO_cleanup (void);
 extern void _IO_flush_all_linebuffered (void);
 libc_hidden_proto (_IO_flush_all_linebuffered)
 extern int _IO_new_fgetpos (FILE *, __fpos_t *);
diff --git a/locale/loadarchive.c b/locale/loadarchive.c
index 454bbc7eda..5b857d5d24 100644
--- a/locale/loadarchive.c
+++ b/locale/loadarchive.c
@@ -498,7 +498,7 @@  _nl_load_locale_from_archive (int category, const char **namep)
   return lia->data[category];
 }
 
-void __libc_freeres_fn_section
+void
 _nl_archive_subfreeres (void)
 {
   struct locale_in_archive *lia;
diff --git a/locale/localeinfo.h b/locale/localeinfo.h
index 66cad7a83b..8bbf281427 100644
--- a/locale/localeinfo.h
+++ b/locale/localeinfo.h
@@ -381,10 +381,10 @@  extern struct __locale_data *_nl_load_locale_from_archive (int category,
 							   const char **namep)
      attribute_hidden;
 
-/* Subroutine of setlocale's __libc_subfreeres hook.  */
+/* Subroutine of setlocale's free resource.  */
 extern void _nl_archive_subfreeres (void) attribute_hidden;
 
-/* Subroutine of gconv-db's __libc_subfreeres hook.  */
+/* Subroutine of gconv-db's free resource.  */
 extern void _nl_locale_subfreeres (void) attribute_hidden;
 
 /* Validate the contents of a locale file and set up the in-core
diff --git a/locale/setlocale.c b/locale/setlocale.c
index dd73fa4248..6a902faa50 100644
--- a/locale/setlocale.c
+++ b/locale/setlocale.c
@@ -468,7 +468,7 @@  setlocale (int category, const char *locale)
 }
 libc_hidden_def (setlocale)
 
-static void __libc_freeres_fn_section
+static void
 free_category (int category,
 	       struct __locale_data *here, struct __locale_data *c_data)
 {
@@ -498,7 +498,7 @@  free_category (int category,
 
 /* This is called from iconv/gconv_db.c's free_mem, as locales must
    be freed before freeing gconv steps arrays.  */
-void __libc_freeres_fn_section
+void
 _nl_locale_subfreeres (void)
 {
 #ifdef NL_CURRENT_INDIRECT
diff --git a/login/getutent.c b/login/getutent.c
index 7a49984912..ed8b162b8a 100644
--- a/login/getutent.c
+++ b/login/getutent.c
@@ -17,10 +17,11 @@ 
 
 #include <stdlib.h>
 #include <utmp.h>
+#include <set-freeres.h>
 
 
 /* Local buffer to store the result.  */
-libc_freeres_ptr (static struct utmp *buffer);
+static struct utmp *buffer;
 
 
 struct utmp *
@@ -42,3 +43,5 @@  __getutent (void)
 }
 libc_hidden_def (__getutent)
 weak_alias (__getutent, getutent)
+
+weak_alias (buffer, __libc_getutent_freemem_ptr)
diff --git a/login/getutid.c b/login/getutid.c
index 7ecc93c0b7..658fdc08ca 100644
--- a/login/getutid.c
+++ b/login/getutid.c
@@ -17,10 +17,10 @@ 
 
 #include <stdlib.h>
 #include <utmp.h>
-
+#include <set-freeres.h>
 
 /* Local buffer to store the result.  */
-libc_freeres_ptr (static struct utmp *buffer);
+static struct utmp *buffer;
 
 struct utmp *
 __getutid (const struct utmp *id)
@@ -40,3 +40,5 @@  __getutid (const struct utmp *id)
 }
 libc_hidden_def (__getutid)
 weak_alias (__getutid, getutid)
+
+weak_alias (buffer, __libc_getutid_freemem_ptr)
diff --git a/login/getutline.c b/login/getutline.c
index c9dcd227a5..a10c256c42 100644
--- a/login/getutline.c
+++ b/login/getutline.c
@@ -17,10 +17,11 @@ 
 
 #include <stdlib.h>
 #include <utmp.h>
+#include <set-freeres.h>
 
 
 /* Local buffer to store the result.  */
-libc_freeres_ptr (static struct utmp *buffer);
+static struct utmp *buffer;
 
 
 struct utmp *
@@ -41,3 +42,5 @@  __getutline (const struct utmp *line)
 }
 libc_hidden_def (__getutline)
 weak_alias (__getutline, getutline)
+
+weak_alias (buffer, __libc_getutline_freemem_ptr)
diff --git a/malloc/set-freeres.c b/malloc/set-freeres.c
index 4a5cec5d4a..f452ff838b 100644
--- a/malloc/set-freeres.c
+++ b/malloc/set-freeres.c
@@ -15,32 +15,62 @@ 
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#include <array_length.h>
 #include <atomic.h>
 #include <stdlib.h>
-#include <set-hooks.h>
 #include <libc-internal.h>
 #include <unwind-link.h>
-#include <dlfcn/dlerror.h>
 #include <ldsodefs.h>
+#include <set-freeres.h>
+#include <set-freeres-system.h>
+
+#ifndef SHARED
+# pragma weak __nss_module_freeres
+# pragma weak __nss_action_freeres
+# pragma weak __nss_database_freeres
+# pragma weak __dl_libc_freemem
+# pragma weak __hdestroy
+# pragma weak __gconv_cache_freemem
+# pragma weak __gconv_conf_freemem
+# pragma weak __gconv_db_freemem
+# pragma weak __gconv_dl_freemem
+# pragma weak __intl_freemem
+# pragma weak __libio_freemem
+# pragma weak __libc_fstab_freemem
+# pragma weak __nscd_gr_map_freemem
+# pragma weak __nscd_hst_map_freemem
+# pragma weak __nscd_pw_map_freemem
+# pragma weak __nscd_serv_map_freemem
+# pragma weak __nscd_group_map_freemem
+# pragma weak __libc_regcomp_freemem
+# pragma weak __libc_atfork_freemem
+# pragma weak __res_thread_freeres
+# pragma weak __libc_resolv_conf_freemem
+# pragma weak __libc_printf_freemem
+# pragma weak __libc_fmtmsg_freemem
+# pragma weak __libc_setenv_freemem
+# pragma weak __rpc_freemem
+# pragma weak __rpc_thread_destroy
+# pragma weak __libc_getaddrinfo_freemem
+# pragma weak __libc_tzset_freemem
+# pragma weak __libc_localealias_freemem
+# pragma weak __gai_freemem
+# pragma weak __aio_freemem
+# pragma weak __libpthread_freeres
+# pragma weak __libc_dlerror_result_free
+# pragma weak __check_pf_freemem
+#endif
 
-#include "../nss/nsswitch.h"
-#include "../libio/libioP.h"
-
-DEFINE_HOOK (__libc_subfreeres, (void));
-
-symbol_set_define (__libc_freeres_ptrs);
-
-extern void __libpthread_freeres (void)
-#if PTHREAD_IN_LIBC && defined SHARED
-/* It is possible to call __libpthread_freeres directly in shared
-   builds with an integrated libpthread.  */
-  attribute_hidden
+#ifdef SHARED
+# define call_free_static_weak(__ptr)				\
+   free (__ptr)
 #else
-  __attribute__ ((weak))
+# define call_free_static_weak(__ptr)				\
+  if (&__ptr != NULL)						\
+    free (__ptr);
 #endif
-  ;
 
-void __libc_freeres_fn_section
+void
 __libc_freeres (void)
 {
   /* This function might be called from different places.  So better
@@ -49,8 +79,6 @@  __libc_freeres (void)
 
   if (!atomic_compare_and_exchange_bool_acq (&already_called, 1, 0))
     {
-      void *const *p;
-
       call_function_static_weak (__nss_module_freeres);
       call_function_static_weak (__nss_action_freeres);
       call_function_static_weak (__nss_database_freeres);
@@ -58,7 +86,43 @@  __libc_freeres (void)
       _IO_cleanup ();
 
       /* We run the resource freeing after IO cleanup.  */
-      RUN_HOOK (__libc_subfreeres, ());
+      call_function_static_weak (__dl_libc_freemem);
+      call_function_static_weak (__hdestroy);
+      call_function_static_weak (__gconv_cache_freemem);
+      call_function_static_weak (__gconv_conf_freemem);
+      call_function_static_weak (__gconv_db_freemem);
+      call_function_static_weak (__gconv_dl_freemem);
+      call_function_static_weak (__intl_freemem);
+      call_function_static_weak (__libio_freemem);
+      call_function_static_weak (__libc_fstab_freemem);
+      call_function_static_weak (__nscd_gr_map_freemem);
+      call_function_static_weak (__nscd_hst_map_freemem);
+      call_function_static_weak (__nscd_pw_map_freemem);
+      call_function_static_weak (__nscd_serv_map_freemem);
+      call_function_static_weak (__nscd_group_map_freemem);
+      call_function_static_weak (__libc_regcomp_freemem);
+      call_function_static_weak (__libc_atfork_freemem);
+      /* __res_thread_freeres deallocates the per-thread resolv_context);
+	 which in turn drop the reference count of the current global object.
+	 So it need to be before __libc_resolv_conf_freemem.  */
+      call_function_static_weak (__res_thread_freeres);
+      call_function_static_weak (__libc_resolv_conf_freemem);
+      call_function_static_weak (__libc_printf_freemem);
+      call_function_static_weak (__libc_fmtmsg_freemem);
+      call_function_static_weak (__libc_setenv_freemem);
+#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_31)
+      call_function_static_weak (__rpc_freemem);
+      call_function_static_weak (__rpc_thread_destroy);
+#endif
+      call_function_static_weak (__libc_getaddrinfo_freemem);
+      call_function_static_weak (__libc_tzset_freemem);
+      call_function_static_weak (__libc_localealias_freemem);
+
+#if PTHREAD_IN_LIBC
+      call_function_static_weak (__gai_freemem);
+
+      call_function_static_weak (__aio_freemem);
+#endif
 
       call_function_static_weak (__libpthread_freeres);
 
@@ -72,9 +136,55 @@  __libc_freeres (void)
       GLRO (dl_libc_freeres) ();
 #endif
 
-      for (p = symbol_set_first_element (__libc_freeres_ptrs);
-           !symbol_set_end_p (__libc_freeres_ptrs, p); ++p)
-        free (*p);
+      call_free_static_weak (__libc_fgetgrent_freemem_ptr);
+      call_free_static_weak (__libc_fgetsgent_freeres_ptr);
+      call_free_static_weak (__libc_getnetgrent_freemem_ptr);
+      call_free_static_weak (__libc_rcmd_freemem_ptr);
+      call_free_static_weak (__libc_rexec_freemem_ptr);
+      call_free_static_weak (__libc_mntent_freemem_ptr);
+      call_free_static_weak (__libc_fgetpwent_freemem_ptr);
+      call_free_static_weak (__libc_resolv_res_hconf_freemem_ptr);
+      call_free_static_weak (__libc_fgetspent_freemem_ptr);
+      call_free_static_weak (__libc_tzfile_freemem_ptr);
+      call_free_static_weak (__libc_getnameinfo_freemem_ptr);
+      call_free_static_weak (__libc_getutent_freemem_ptr);
+      call_free_static_weak (__libc_getutid_freemem_ptr);
+      call_free_static_weak (__libc_getutline_freemem_ptr);
+      call_free_static_weak (__libc_reg_printf_freemem_ptr);
+      call_free_static_weak (__libc_reg_type_freemem_ptr);
+
+      call_free_static_weak (__libc_getgrgid_freemem_ptr);
+      call_free_static_weak (__libc_getgrnam_freemem_ptr);
+      call_free_static_weak (__libc_getpwnam_freemem_ptr);
+      call_free_static_weak (__libc_getpwuid_freemem_ptr);
+      call_free_static_weak (__libc_getspnam_freemem_ptr);
+      call_free_static_weak (__libc_getaliasbyname_freemem_ptr);
+      call_free_static_weak (__libc_gethostbyaddr_freemem_ptr);
+      call_free_static_weak (__libc_gethostbyname_freemem_ptr);
+      call_free_static_weak (__libc_gethostbyname2_freemem_ptr);
+      call_free_static_weak (__libc_getnetbyaddr_freemem_ptr);
+      call_free_static_weak (__libc_getnetbyname_freemem_ptr);
+      call_free_static_weak (__libc_getprotobynumber_freemem_ptr);
+      call_free_static_weak (__libc_getprotobyname_freemem_ptr);
+      call_free_static_weak (__libc_getrpcbyname_freemem_ptr);
+      call_free_static_weak (__libc_getrpcbynumber_freemem_ptr);
+      call_free_static_weak (__libc_getservbyname_freemem_ptr);
+      call_free_static_weak (__libc_getservbyport_freemem_ptr);
+
+      call_free_static_weak (__libc_getgrent_freemem_ptr);
+      call_free_static_weak (__libc_getpwent_freemem_ptr);
+      call_free_static_weak (__libc_getspent_freemem_ptr);
+      call_free_static_weak (__libc_getaliasent_freemem_ptr);
+      call_free_static_weak (__libc_gethostent_freemem_ptr);
+      call_free_static_weak (__libc_getnetent_freemem_ptr);
+      call_free_static_weak (__libc_getprotoent_freemem_ptr);
+      call_free_static_weak (__libc_getrpcent_freemem_ptr);
+      call_free_static_weak (__libc_getservent_freemem_ptr);
+
+      call_free_static_weak (__libc_efgcvt_freemem_ptr);
+      call_free_static_weak (__libc_qefgcvt_freemem_ptr);
+
+      call_freeres_system_funcs;
     }
 }
 libc_hidden_def (__libc_freeres)
diff --git a/malloc/thread-freeres.c b/malloc/thread-freeres.c
index cbb99f8bb4..416d199afd 100644
--- a/malloc/thread-freeres.c
+++ b/malloc/thread-freeres.c
@@ -16,18 +16,15 @@ 
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <dlfcn/dlerror.h>
 #include <libc-internal.h>
 #include <malloc-internal.h>
-#include <resolv/resolv-internal.h>
-#include <rpc/rpc.h>
-#include <string.h>
-#include <tls-internal.h>
+#include <set-freeres.h>
 #include <shlib-compat.h>
+#include <tls-internal.h>
 
 /* Thread shutdown function.  Note that this function must be called
    for threads during shutdown for correctness reasons.  Unlike
-   __libc_subfreeres, skipping calls to it is not a valid optimization.
+   __libc_freeres, skipping calls to it is not a valid optimization.
    This is called directly from pthread_create as the thread exits.  */
 void
 __libc_thread_freeres (void)
diff --git a/misc/efgcvt-template.c b/misc/efgcvt-template.c
index 27a00a3ab5..00d0aa1d7e 100644
--- a/misc/efgcvt-template.c
+++ b/misc/efgcvt-template.c
@@ -22,6 +22,7 @@ 
 #include <sys/param.h>
 #include <libc-lock.h>
 #include <math_ldbl_opt.h>
+#include <set-freeres.h>
 
 #ifndef SPRINTF
 # define SPRINTF sprintf
@@ -38,7 +39,7 @@ 
 
 static char FCVT_BUFFER[MAXDIG];
 static char ECVT_BUFFER[MAXDIG];
-libc_freeres_ptr (static char *FCVT_BUFPTR);
+static char *FCVT_BUFPTR;
 
 char *
 __FCVT (FLOAT_TYPE value, int ndigit, int *decpt, int *sign)
@@ -73,3 +74,5 @@  __GCVT (FLOAT_TYPE value, int ndigit, char *buf)
   SPRINTF (buf, "%.*" FLOAT_FMT_FLAG "g", MIN (ndigit, NDIGIT_MAX), value);
   return buf;
 }
+
+weak_alias (FCVT_BUFPTR, __EFGCVT_FREEMEM_PTR);
diff --git a/misc/efgcvt.c b/misc/efgcvt.c
index 53673a08fe..f2a33afcdf 100644
--- a/misc/efgcvt.c
+++ b/misc/efgcvt.c
@@ -24,6 +24,7 @@ 
 #define __GCVT __gcvt
 #define __ECVT_R __ecvt_r
 #define __FCVT_R __fcvt_r
+#define __EFGCVT_FREEMEM_PTR __libc_efgcvt_freemem_ptr
 #include <efgcvt-dbl-macros.h>
 #include <efgcvt-template.c>
 
diff --git a/misc/fstab.c b/misc/fstab.c
index 0e04235a2b..ea4afc7d0f 100644
--- a/misc/fstab.c
+++ b/misc/fstab.c
@@ -177,7 +177,8 @@  fstab_convert (struct fstab_state *state)
 
 /* Make sure the memory is freed if the programs ends while in
    memory-debugging mode and something actually was allocated.  */
-libc_freeres_fn (fstab_free)
+void
+__libc_fstab_freemem (void)
 {
   char *buffer;
 
diff --git a/misc/hsearch.c b/misc/hsearch.c
index 615f7f08a3..f9a3f9267a 100644
--- a/misc/hsearch.c
+++ b/misc/hsearch.c
@@ -46,7 +46,3 @@  __hdestroy (void)
   __hdestroy_r (&htab);
 }
 weak_alias (__hdestroy, hdestroy)
-
-/* Make sure the table is freed if we want to free everything before
-   exiting.  */
-text_set_element (__libc_subfreeres, __hdestroy);
diff --git a/misc/mntent.c b/misc/mntent.c
index 4a1c5444cf..61dc63f253 100644
--- a/misc/mntent.c
+++ b/misc/mntent.c
@@ -19,6 +19,7 @@ 
 #include <mntent.h>
 #include <stdlib.h>
 #include <allocate_once.h>
+#include <set-freeres.h>
 
 struct mntent_buffer
 {
@@ -28,7 +29,7 @@  struct mntent_buffer
 
 /* We don't want to allocate the static buffer all the time since it
    is not always used (in fact, rather infrequently).  */
-libc_freeres_ptr (static void *mntent_buffer);
+static void *mntent_buffer;
 
 static void *
 allocate (void *closure)
@@ -56,3 +57,5 @@  getmntent (FILE *stream)
   return __getmntent_r (stream, &buffer->m,
 			buffer->buffer, sizeof (buffer->buffer));
 }
+
+weak_alias (mntent_buffer, __libc_mntent_freemem_ptr)
diff --git a/misc/qefgcvt.c b/misc/qefgcvt.c
index 91a3e2014a..a4ea8b801e 100644
--- a/misc/qefgcvt.c
+++ b/misc/qefgcvt.c
@@ -24,6 +24,7 @@ 
 #define __GCVT __qgcvt
 #define __ECVT_R __qecvt_r
 #define __FCVT_R __qfcvt_r
+#define __EFGCVT_FREEMEM_PTR __libc_qefgcvt_freemem_ptr
 #include <efgcvt-ldbl-macros.h>
 #include <efgcvt-template.c>
 
diff --git a/misc/unwind-link.c b/misc/unwind-link.c
index 63b655949e..c1e971b305 100644
--- a/misc/unwind-link.c
+++ b/misc/unwind-link.c
@@ -131,7 +131,7 @@  __libc_unwind_link_after_fork (void)
     }
 }
 
-void __libc_freeres_fn_section
+void
 __libc_unwind_link_freeres (void)
 {
   if (global_libgcc_handle != NULL)
diff --git a/nptl/nptlfreeres.c b/nptl/nptlfreeres.c
index 03ee6bd31a..ee9bca8387 100644
--- a/nptl/nptlfreeres.c
+++ b/nptl/nptlfreeres.c
@@ -16,7 +16,6 @@ 
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <set-hooks.h>
 #include <libc-symbols.h>
 #include <pthreadP.h>
 #include <nptl-stack.h>
diff --git a/nscd/nscd_getgr_r.c b/nscd/nscd_getgr_r.c
index f30d99973d..07e894019a 100644
--- a/nscd/nscd_getgr_r.c
+++ b/nscd/nscd_getgr_r.c
@@ -68,7 +68,8 @@  libc_locked_map_ptr (,__gr_map_handle) attribute_hidden;
 /* Note that we only free the structure if necessary.  The memory
    mapping is not removed since it is not visible to the malloc
    handling.  */
-libc_freeres_fn (gr_map_free)
+void
+__nscd_gr_map_freemem (void)
 {
   if (__gr_map_handle.mapped != NO_MAPPING)
     {
diff --git a/nscd/nscd_gethst_r.c b/nscd/nscd_gethst_r.c
index ab9c9d311f..c6a6247f73 100644
--- a/nscd/nscd_gethst_r.c
+++ b/nscd/nscd_gethst_r.c
@@ -81,7 +81,8 @@  libc_locked_map_ptr (, __hst_map_handle) attribute_hidden;
 /* Note that we only free the structure if necessary.  The memory
    mapping is not removed since it is not visible to the malloc
    handling.  */
-libc_freeres_fn (hst_map_free)
+void
+__nscd_hst_map_freemem (void)
 {
   if (__hst_map_handle.mapped != NO_MAPPING)
     {
diff --git a/nscd/nscd_getpw_r.c b/nscd/nscd_getpw_r.c
index 0cae7ad61c..17d9753f8a 100644
--- a/nscd/nscd_getpw_r.c
+++ b/nscd/nscd_getpw_r.c
@@ -67,7 +67,8 @@  libc_locked_map_ptr (static, map_handle);
 /* Note that we only free the structure if necessary.  The memory
    mapping is not removed since it is not visible to the malloc
    handling.  */
-libc_freeres_fn (pw_map_free)
+void
+__nscd_pw_map_freemem (void)
 {
   if (map_handle.mapped != NO_MAPPING)
     {
diff --git a/nscd/nscd_getserv_r.c b/nscd/nscd_getserv_r.c
index 6969fcb739..1458c6ca22 100644
--- a/nscd/nscd_getserv_r.c
+++ b/nscd/nscd_getserv_r.c
@@ -62,7 +62,8 @@  libc_locked_map_ptr (, __serv_map_handle) attribute_hidden;
 /* Note that we only free the structure if necessary.  The memory
    mapping is not removed since it is not visible to the malloc
    handling.  */
-libc_freeres_fn (serv_map_free)
+void
+__nscd_serv_map_freemem (void)
 {
   if (__serv_map_handle.mapped != NO_MAPPING)
     {
diff --git a/nscd/nscd_netgroup.c b/nscd/nscd_netgroup.c
index 29cd3a5116..6f4c383ace 100644
--- a/nscd/nscd_netgroup.c
+++ b/nscd/nscd_netgroup.c
@@ -31,7 +31,8 @@  libc_locked_map_ptr (static, map_handle);
 /* Note that we only free the structure if necessary.  The memory
    mapping is not removed since it is not visible to the malloc
    handling.  */
-libc_freeres_fn (pw_map_free)
+void
+__nscd_group_map_freemem (void)
 {
   if (map_handle.mapped != NO_MAPPING)
     {
diff --git a/nss/getXXbyYY.c b/nss/getXXbyYY.c
index 0c473a4294..efb17f0571 100644
--- a/nss/getXXbyYY.c
+++ b/nss/getXXbyYY.c
@@ -20,6 +20,7 @@ 
 #include <libc-lock.h>
 #include <stdlib.h>
 #include <resolv.h>
+#include <set-freeres.h>
 
 #include "nsswitch.h"
 
@@ -58,6 +59,9 @@ 
 #define APPEND_R1(name) name##_r
 #define INTERNAL(name) INTERNAL1 (name)
 #define INTERNAL1(name) __##name
+#define APPEND_FREEMEM_NAME1(name) __libc_##name##_freemem_ptr
+#define APPEND_FREEMEM_NAME(name) APPEND_FREEMEM_NAME1(name)
+#define FREEMEM_NAME APPEND_FREEMEM_NAME (FUNCTION_NAME)
 
 /* Sometimes we need to store error codes in the `h_errno' variable.  */
 #ifdef NEED_H_ERRNO
@@ -86,8 +90,9 @@  extern int INTERNAL (REENTRANT_NAME) (ADD_PARAMS, LOOKUP_TYPE *resbuf,
 __libc_lock_define_initialized (static, lock);
 
 /* This points to the static buffer used.  */
-libc_freeres_ptr (static char *buffer);
+static char *buffer;
 
+weak_alias (buffer, FREEMEM_NAME)
 
 LOOKUP_TYPE *
 FUNCTION_NAME (ADD_PARAMS)
diff --git a/nss/getXXent.c b/nss/getXXent.c
index 7ac8379fbc..8acb6dc54f 100644
--- a/nss/getXXent.c
+++ b/nss/getXXent.c
@@ -18,6 +18,7 @@ 
 #include <errno.h>
 #include <libc-lock.h>
 #include <stdlib.h>
+#include <set-freeres.h>
 
 #include "nsswitch.h"
 
@@ -43,6 +44,9 @@ 
 #define APPEND_R1(name) name##_r
 #define INTERNAL(name) INTERNAL1 (name)
 #define INTERNAL1(name) __##name
+#define APPEND_FREEMEM_NAME1(name) __libc_##name##_freemem_ptr
+#define APPEND_FREEMEM_NAME(name) APPEND_FREEMEM_NAME1(name)
+#define FREEMEM_NAME APPEND_FREEMEM_NAME (GETFUNC_NAME)
 
 /* Sometimes we need to store error codes in the `h_errno' variable.  */
 #ifdef NEED_H_ERRNO
@@ -62,8 +66,9 @@  extern int INTERNAL (REENTRANT_GETNAME) (LOOKUP_TYPE *resbuf, char *buffer,
 __libc_lock_define_initialized (static, lock);
 
 /* This points to the static buffer used.  */
-libc_freeres_ptr (static char *buffer);
+static char *buffer;
 
+weak_alias (buffer, FREEMEM_NAME)
 
 LOOKUP_TYPE *
 GETFUNC_NAME (void)
diff --git a/nss/nss_action.c b/nss/nss_action.c
index 8ca72546eb..447c219c5b 100644
--- a/nss/nss_action.c
+++ b/nss/nss_action.c
@@ -102,7 +102,7 @@  __nss_action_allocate (struct nss_action *actions, size_t count)
   return result;
 }
 
-void __libc_freeres_fn_section
+void
 __nss_action_freeres (void)
 {
   struct nss_action_list_wrapper *current = nss_actions;
diff --git a/nss/nss_action.h b/nss/nss_action.h
index edd84b8e8a..7ab2415417 100644
--- a/nss/nss_action.h
+++ b/nss/nss_action.h
@@ -101,8 +101,5 @@  nss_action_list __nss_action_allocate (struct nss_action *actions,
    EINVAL means that LINE is syntactically invalid.  */
 nss_action_list __nss_action_parse (const char *line);
 
-/* Called from __libc_freeres.  */
-void __nss_action_freeres (void) attribute_hidden;
-
 
 #endif /* _NSS_ACTION_H */
diff --git a/nss/nss_database.c b/nss/nss_database.c
index 335034605f..2edcab4b9d 100644
--- a/nss/nss_database.c
+++ b/nss/nss_database.c
@@ -495,7 +495,7 @@  __nss_database_get_noreload (enum nss_database db)
   return result;
 }
 
-void __libc_freeres_fn_section
+void
 __nss_database_freeres (void)
 {
   free (global_database_state);
diff --git a/nss/nss_database.h b/nss/nss_database.h
index 2462030511..1a17261f65 100644
--- a/nss/nss_database.h
+++ b/nss/nss_database.h
@@ -64,9 +64,6 @@  libc_hidden_proto (__nss_database_get)
 nss_action_list __nss_database_get_noreload (enum nss_database db)
   attribute_hidden;
 
-/* Called from __libc_freeres.  */
-void __nss_database_freeres (void) attribute_hidden;
-
 /* Internal type.  Exposed only for fork handling purposes.  */
 struct nss_database_data
 {
diff --git a/nss/nss_module.c b/nss/nss_module.c
index 8815fefc21..487e513def 100644
--- a/nss/nss_module.c
+++ b/nss/nss_module.c
@@ -416,7 +416,7 @@  __nss_module_disable_loading (void)
   __libc_lock_unlock (nss_module_list_lock);
 }
 
-void __libc_freeres_fn_section
+void
 __nss_module_freeres (void)
 {
   struct nss_module *current = nss_module_list;
diff --git a/nss/nss_module.h b/nss/nss_module.h
index eda0ebc5ef..fb30fb8b4c 100644
--- a/nss/nss_module.h
+++ b/nss/nss_module.h
@@ -100,7 +100,4 @@  void *__nss_module_get_function (struct nss_module *module, const char *name)
 /* Block attempts to dlopen any module we haven't already opened.  */
 void __nss_module_disable_loading (void);
 
-/* Called from __libc_freeres.  */
-void __nss_module_freeres (void) attribute_hidden;
-
 #endif /* NSS_MODULE_H */
diff --git a/posix/regcomp.c b/posix/regcomp.c
index c3231ea824..647b18ba9e 100644
--- a/posix/regcomp.c
+++ b/posix/regcomp.c
@@ -710,7 +710,8 @@  re_comp (const char *s)
 }
 
 #ifdef _LIBC
-libc_freeres_fn (free_mem)
+void
+__libc_regcomp_freemem (void)
 {
   __regfree (&re_comp_buf);
 }
diff --git a/posix/register-atfork.c b/posix/register-atfork.c
index 4d89a457a0..14ebc2587a 100644
--- a/posix/register-atfork.c
+++ b/posix/register-atfork.c
@@ -217,7 +217,8 @@  __run_postfork_handlers (enum __run_fork_handler_type who, _Bool do_locking,
 }
 
 
-libc_freeres_fn (free_mem)
+void
+__libc_atfork_freemem (void)
 {
   lll_lock (atfork_lock, LLL_PRIVATE);
 
diff --git a/pwd/fgetpwent.c b/pwd/fgetpwent.c
index f069aa6f0c..b7864d263a 100644
--- a/pwd/fgetpwent.c
+++ b/pwd/fgetpwent.c
@@ -20,12 +20,13 @@ 
 #include <pwd.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <set-freeres.h>
 
 
 /* We need to protect the dynamic buffer handling.  */
 __libc_lock_define_initialized (static, lock);
 
-libc_freeres_ptr (static char *buffer);
+static char *buffer;
 
 /* Read one entry from the given stream.  */
 struct passwd *
@@ -82,3 +83,5 @@  fgetpwent (FILE *stream)
 
   return result;
 }
+
+weak_alias (buffer, __libc_fgetpwent_freemem_ptr)
diff --git a/resolv/gai_misc.c b/resolv/gai_misc.c
index dda9b47f00..9e3b1d29b7 100644
--- a/resolv/gai_misc.c
+++ b/resolv/gai_misc.c
@@ -434,7 +434,11 @@  handle_requests (void *arg)
 
 
 /* Free allocated resources.  */
-libc_freeres_fn (free_res)
+#if !PTHREAD_IN_LIBC
+__attribute__ ((__destructor__)) static
+#endif
+void
+__gai_freemem (void)
 {
   size_t row;
 
diff --git a/resolv/res-close.c b/resolv/res-close.c
index 936fd3d1dd..8d546777c7 100644
--- a/resolv/res-close.c
+++ b/resolv/res-close.c
@@ -140,5 +140,3 @@  __res_thread_freeres (void)
   /* Make sure we do a full re-initialization the next time.  */
   _res.options = 0;
 }
-/* Also must be called when the main thread exits.  */
-text_set_element (__libc_subfreeres, __res_thread_freeres);
diff --git a/resolv/res_hconf.c b/resolv/res_hconf.c
index 2c4e12b6cd..89bd20be38 100644
--- a/resolv/res_hconf.c
+++ b/resolv/res_hconf.c
@@ -42,6 +42,7 @@ 
 #include "res_hconf.h"
 #include <wchar.h>
 #include <atomic.h>
+#include <set-freeres.h>
 
 #if IS_IN (libc)
 # define fgets_unlocked __fgets_unlocked
@@ -330,19 +331,8 @@  _res_hconf_init (void)
 #if IS_IN (libc)
 # if defined SIOCGIFCONF && defined SIOCGIFNETMASK
 /* List of known interfaces.  */
-libc_freeres_ptr (
-static struct netaddr
-{
-  int addrtype;
-  union
-  {
-    struct
-    {
-      uint32_t	addr;
-      uint32_t	mask;
-    } ipv4;
-  } u;
-} *ifaddrs);
+static struct netaddr *ifaddrs;
+weak_alias (ifaddrs, __libc_resolv_res_hconf_freemem_ptr)
 # endif
 
 /* Reorder addresses returned in a hostent such that the first address
diff --git a/resolv/resolv-internal.h b/resolv/resolv-internal.h
index 97812ebf6c..c55f3c0366 100644
--- a/resolv/resolv-internal.h
+++ b/resolv/resolv-internal.h
@@ -34,6 +34,20 @@ 
    loads and stores.  */
 typedef HEADER __attribute__ ((__aligned__(1))) UHEADER;
 
+/* List of known interfaces.  */
+struct netaddr
+{
+  int addrtype;
+  union
+  {
+    struct
+    {
+      uint32_t	addr;
+      uint32_t	mask;
+    } ipv4;
+  } u;
+};
+
 /* Legacy function.  This needs to be removed once all NSS modules
    have been adjusted.  */
 static inline bool
diff --git a/resolv/resolv_conf.c b/resolv/resolv_conf.c
index 2e561c8959..0ef66d49d3 100644
--- a/resolv/resolv_conf.c
+++ b/resolv/resolv_conf.c
@@ -654,7 +654,8 @@  __resolv_conf_detach (struct __res_state *resp)
 }
 
 /* Deallocate the global data.  */
-libc_freeres_fn (freeres)
+void
+__libc_resolv_conf_freemem (void)
 {
   /* No locking because this function is supposed to be called when
      the process has turned single-threaded.  */
diff --git a/resolv/tst-leaks2.c b/resolv/tst-leaks2.c
index 3851ea06ce..50a8054546 100644
--- a/resolv/tst-leaks2.c
+++ b/resolv/tst-leaks2.c
@@ -23,6 +23,8 @@ 
 #include <resolv.h>
 #include <support/check.h>
 
+void __libc_freeres (void);
+
 static int
 do_test (void)
 {
diff --git a/rt/aio_misc.c b/rt/aio_misc.c
index cde3de8b7f..49ec0aa293 100644
--- a/rt/aio_misc.c
+++ b/rt/aio_misc.c
@@ -694,7 +694,11 @@  handle_fildes_io (void *arg)
 
 
 /* Free allocated resources.  */
-libc_freeres_fn (free_res)
+#if !PTHREAD_IN_LIBC
+__attribute__ ((__destructor__)) static
+#endif
+void
+__aio_freemem (void)
 {
   size_t row;
 
diff --git a/shadow/fgetspent.c b/shadow/fgetspent.c
index 76a18bf4fb..541947bad6 100644
--- a/shadow/fgetspent.c
+++ b/shadow/fgetspent.c
@@ -20,6 +20,7 @@ 
 #include <shadow.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <set-freeres.h>
 
 
 /* A reasonable size for a buffer to start with.  */
@@ -28,7 +29,7 @@ 
 /* We need to protect the dynamic buffer handling.  */
 __libc_lock_define_initialized (static, lock);
 
-libc_freeres_ptr (static char *buffer);
+static char *buffer;
 
 /* Read one shadow entry from the given stream.  */
 struct spwd *
@@ -85,3 +86,5 @@  fgetspent (FILE *stream)
 
   return result;
 }
+
+weak_alias (buffer, __libc_fgetspent_freemem_ptr);
diff --git a/stdio-common/reg-modifier.c b/stdio-common/reg-modifier.c
index b911aea703..a52022d1ba 100644
--- a/stdio-common/reg-modifier.c
+++ b/stdio-common/reg-modifier.c
@@ -183,7 +183,8 @@  __handle_registered_modifier_wc (const unsigned int **format,
 }
 
 
-libc_freeres_fn (free_mem)
+void
+__libc_printf_freemem (void)
 {
   if (__printf_modifier_table != NULL)
     {
diff --git a/stdio-common/reg-printf.c b/stdio-common/reg-printf.c
index 3ec81e6956..0d14ac6afa 100644
--- a/stdio-common/reg-printf.c
+++ b/stdio-common/reg-printf.c
@@ -21,11 +21,11 @@ 
 #include <stddef.h>
 #include <stdlib.h>
 #include <libc-lock.h>
+#include <set-freeres.h>
 
 
 /* Array of functions indexed by format character.  */
-libc_freeres_ptr (printf_arginfo_size_function **__printf_arginfo_table)
-  attribute_hidden;
+printf_arginfo_size_function **__printf_arginfo_table attribute_hidden;
 printf_function **__printf_function_table attribute_hidden;
 
 __libc_lock_define_initialized (static, lock)
@@ -79,3 +79,5 @@  __register_printf_function (int spec, printf_function converter,
 				      (printf_arginfo_size_function*) arginfo);
 }
 weak_alias (__register_printf_function, register_printf_function)
+
+weak_alias (__printf_arginfo_table, __libc_reg_printf_freemem_ptr)
diff --git a/stdio-common/reg-type.c b/stdio-common/reg-type.c
index 02edac4da3..980a911ae2 100644
--- a/stdio-common/reg-type.c
+++ b/stdio-common/reg-type.c
@@ -19,11 +19,11 @@ 
 #include <printf.h>
 #include <stdlib.h>
 #include <libc-lock.h>
+#include <set-freeres.h>
 
 
 /* Array of functions indexed by format character.  */
-libc_freeres_ptr (printf_va_arg_function **__printf_va_arg_table)
-  attribute_hidden;
+printf_va_arg_function **__printf_va_arg_table attribute_hidden;
 
 __libc_lock_define_initialized (static, lock);
 
@@ -59,3 +59,5 @@  __register_printf_type (printf_va_arg_function fct)
   return result;
 }
 weak_alias (__register_printf_type, register_printf_type)
+
+weak_alias (__printf_va_arg_table, __libc_reg_type_freemem_ptr)
diff --git a/stdlib/exit.c b/stdlib/exit.c
index 1cd0bdfe94..d6c188b739 100644
--- a/stdlib/exit.c
+++ b/stdlib/exit.c
@@ -20,7 +20,7 @@ 
 #include <unistd.h>
 #include <pointer_guard.h>
 #include <libc-lock.h>
-#include <libio/libioP.h>
+#include <set-freeres.h>
 #include "exit.h"
 
 /* Initialize the flag that indicates exit function processing
diff --git a/stdlib/fmtmsg.c b/stdlib/fmtmsg.c
index b631ef3d01..3d9a0edf12 100644
--- a/stdlib/fmtmsg.c
+++ b/stdlib/fmtmsg.c
@@ -361,7 +361,8 @@  __addseverity (int severity, const char *string)
 weak_alias (__addseverity, addseverity)
 
 
-libc_freeres_fn (free_mem)
+void
+__libc_fmtmsg_freemem (void)
 {
   struct severity_info *runp = severity_list;
 
diff --git a/stdlib/setenv.c b/stdlib/setenv.c
index 2fa9e41e31..ba5257d3bf 100644
--- a/stdlib/setenv.c
+++ b/stdlib/setenv.c
@@ -323,7 +323,8 @@  clearenv (void)
   return 0;
 }
 #ifdef _LIBC
-libc_freeres_fn (free_mem)
+void
+__libc_setenv_freemem (void)
 {
   /* Remove all traces.  */
   clearenv ();
diff --git a/sunrpc/clnt_perr.c b/sunrpc/clnt_perr.c
index 67499fd03f..c3d13722df 100644
--- a/sunrpc/clnt_perr.c
+++ b/sunrpc/clnt_perr.c
@@ -389,8 +389,8 @@  auth_errmsg (enum auth_stat stat)
 }
 
 
-libc_freeres_fn (free_mem)
+void
+__rpc_freemem (void)
 {
-  /* Not libc_freeres_ptr, since buf is a macro.  */
   free (buf);
 }
diff --git a/sunrpc/rpc_thread.c b/sunrpc/rpc_thread.c
index 0abe6dc172..a04b7ec47f 100644
--- a/sunrpc/rpc_thread.c
+++ b/sunrpc/rpc_thread.c
@@ -37,7 +37,6 @@  __rpc_thread_destroy (void)
 		thread_rpc_vars = NULL;
 	}
 }
-text_set_element (__libc_subfreeres, __rpc_thread_destroy);
 
 /*
  * Initialize RPC multi-threaded operation
diff --git a/sunrpc/tst-svc_register.c b/sunrpc/tst-svc_register.c
index 542c5c2a89..434a5bedef 100644
--- a/sunrpc/tst-svc_register.c
+++ b/sunrpc/tst-svc_register.c
@@ -276,9 +276,9 @@  do_test (void)
               else
                 /* This is arguably a bug: Regular process termination
                    does not unregister the service with rpcbind.  The
-                   unset rpcbind call happens from a __libc_subfreeres
-                   callback, and this only happens when running under
-                   memory debuggers such as valgrind.  */
+                   unset rpcbind call happens from a __libc_freeres,
+                   and this only happens when running under memory debuggers
+		   such as valgrind.  */
                 TEST_VERIFY (!state.unset_called);
             }
           else
diff --git a/sysdeps/generic/set-freeres-fp.h b/sysdeps/generic/set-freeres-fp.h
new file mode 100644
index 0000000000..f73ac747ad
--- /dev/null
+++ b/sysdeps/generic/set-freeres-fp.h
@@ -0,0 +1,19 @@ 
+/* System specific resource deallocation.  Generic version.
+   Copyright (C) 2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+#define call_freeres_fp_funcs
diff --git a/sysdeps/generic/set-freeres-os.h b/sysdeps/generic/set-freeres-os.h
new file mode 100644
index 0000000000..6b17c8307a
--- /dev/null
+++ b/sysdeps/generic/set-freeres-os.h
@@ -0,0 +1,19 @@ 
+/* System specific resource deallocation.  Generic version.
+   Copyright (C) 2020-2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+#define call_freeres_os_funcs
diff --git a/sysdeps/generic/set-freeres-system.h b/sysdeps/generic/set-freeres-system.h
new file mode 100644
index 0000000000..88701a657f
--- /dev/null
+++ b/sysdeps/generic/set-freeres-system.h
@@ -0,0 +1,27 @@ 
+/* System specific resource deallocation.  Generic version.
+   Copyright (C) 2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+/* Each system may define weak functions to free any resource allocated with
+   malloc to avoid interfere with mtrace.  */
+
+#include <set-freeres-os.h>
+#include <set-freeres-fp.h>
+
+#define call_freeres_system_funcs	\
+  call_freeres_os_funcs;		\
+  call_freeres_fp_funcs
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-qefgcvt.c b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-qefgcvt.c
index e56e01ab2d..18a881d4d0 100644
--- a/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-qefgcvt.c
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/ieee128-qefgcvt.c
@@ -42,6 +42,7 @@  typeof (qfcvt_r) ___qfcvtieee128_r;
 #define __GCVT ___qgcvtieee128
 #define __ECVT_R ___qecvtieee128_r
 #define __FCVT_R ___qfcvtieee128_r
+#define __EFGCVT_FREEMEM_PTR __libc_efgcvtieee128_freemem_ptr
 #include <efgcvt-ldbl-macros.h>
 #include <efgcvt-template.c>
 
diff --git a/sysdeps/ieee754/ldbl-128ibm-compat/set-freeres-fp.h b/sysdeps/ieee754/ldbl-128ibm-compat/set-freeres-fp.h
new file mode 100644
index 0000000000..3f6e17612a
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm-compat/set-freeres-fp.h
@@ -0,0 +1,22 @@ 
+/* System specific resource deallocation.  IBM long double 128 version.
+   Copyright (C) 2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+extern char * __libc_efgcvtieee128_freemem_ptr attribute_hidden;
+
+#define call_freeres_fp_funcs \
+  call_free_static_weak (__libc_efgcvtieee128_freemem_ptr)
diff --git a/sysdeps/mach/hurd/bits/errno.h b/sysdeps/mach/hurd/bits/errno.h
index 90c8897739..0d935e724a 100644
--- a/sysdeps/mach/hurd/bits/errno.h
+++ b/sysdeps/mach/hurd/bits/errno.h
@@ -9,7 +9,6 @@ 
      mach/boolean.h
      mach/i386/boolean.h
      mach/i386/vm_types.h
-     mach/i386/stdint.h
      mach/mig_errors.h
      device/device_types.h
      mach/std_types.h
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index fd22dc4fcb..0356b622be 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -1761,7 +1761,8 @@  check_gaiconf_mtime (const struct __stat64_t64 *st)
 #endif
 
 
-libc_freeres_fn(fini)
+void
+__libc_getaddrinfo_freemem (void)
 {
   if (labels != default_labels)
     {
@@ -2233,7 +2234,7 @@  no_file:
 
   /* If we previously read the file but it is gone now, free the old data and
      use the builtin one.  Leave the reload flag alone.  */
-  fini ();
+  __libc_getaddrinfo_freemem ();
 }
 
 
diff --git a/sysdeps/posix/ttyname.c b/sysdeps/posix/ttyname.c
index 2e19aff758..a5805cd662 100644
--- a/sysdeps/posix/ttyname.c
+++ b/sysdeps/posix/ttyname.c
@@ -24,6 +24,7 @@ 
 #include <unistd.h>
 #include <string.h>
 #include <stdlib.h>
+#include <set-freeres.h>
 
 char *__ttyname;
 
@@ -31,7 +32,8 @@  static char *getttyname (int fd, dev_t mydev, ino_t myino,
 			 int save, int *dostat);
 
 
-libc_freeres_ptr (static char *getttyname_name);
+static char *getttyname_name;
+weak_alias (getttyname_name, __ttyname_freemem_ptr)
 
 static char *
 getttyname (int fd, dev_t mydev, ino_t myino, int save, int *dostat)
diff --git a/sysdeps/unix/sysv/linux/check_pf.c b/sysdeps/unix/sysv/linux/check_pf.c
index de207122b0..b157c5126c 100644
--- a/sysdeps/unix/sysv/linux/check_pf.c
+++ b/sysdeps/unix/sysv/linux/check_pf.c
@@ -362,7 +362,8 @@  __check_pf (bool *seen_ipv4, bool *seen_ipv6,
 }
 
 /* Free the cache if it has been allocated.  */
-libc_freeres_fn (freecache)
+void
+__check_pf_freemem (void)
 {
   if (cache)
     __free_in6ai (cache->in6ai);
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/getutent.c b/sysdeps/unix/sysv/linux/s390/s390-32/getutent.c
index d8188f8b5b..562495b122 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/getutent.c
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/getutent.c
@@ -25,6 +25,7 @@ 
 # define weak_alias(n,a)
 #endif
 #include "login/getutent.c"
+_weak_alias (buffer, __libc_getutent_freemem_ptr)
 
 #if defined SHARED
 default_symbol_version (__getutent, getutent, UTMP_COMPAT_BASE);
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/getutid.c b/sysdeps/unix/sysv/linux/s390/s390-32/getutid.c
index cd981c72ba..ccdc25b2d6 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/getutid.c
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/getutid.c
@@ -25,6 +25,7 @@ 
 # define weak_alias(n,a)
 #endif
 #include "login/getutid.c"
+_weak_alias (buffer, __libc_getutid_freemem_ptr)
 
 #if defined SHARED
 default_symbol_version (__getutid, getutid, UTMP_COMPAT_BASE);
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/getutline.c b/sysdeps/unix/sysv/linux/s390/s390-32/getutline.c
index 0b611619f1..16e8f17915 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/getutline.c
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/getutline.c
@@ -25,6 +25,7 @@ 
 # define weak_alias(n,a)
 #endif
 #include "login/getutline.c"
+_weak_alias (buffer, __libc_getutline_freemem_ptr)
 
 #if defined SHARED
 default_symbol_version (__getutline, getutline, UTMP_COMPAT_BASE);
diff --git a/sysdeps/unix/sysv/linux/set-freeres-os.h b/sysdeps/unix/sysv/linux/set-freeres-os.h
new file mode 100644
index 0000000000..964c9a4bfc
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/set-freeres-os.h
@@ -0,0 +1,24 @@ 
+/* System specific resource deallocation.  Linux version.
+   Copyright (C) 2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+extern void __check_pf_freemem (void) attribute_hidden;
+extern char * __ttyname_freemem_ptr attribute_hidden;
+
+#define call_freeres_os_funcs			  \
+  call_function_static_weak (__check_pf_freemem); \
+  call_free_static_weak (__ttyname_freemem_ptr)
diff --git a/sysdeps/unix/sysv/linux/ttyname.c b/sysdeps/unix/sysv/linux/ttyname.c
index f3870f8ec3..406fbb30f2 100644
--- a/sysdeps/unix/sysv/linux/ttyname.c
+++ b/sysdeps/unix/sysv/linux/ttyname.c
@@ -19,15 +19,11 @@ 
 #include <limits.h>
 #include <termios.h>
 #include <stdlib.h>
-
+#include <set-freeres.h>
 #include "ttyname.h"
 
 static char *ttyname_buf = NULL;
-
-libc_freeres_fn (free_mem)
-{
-  free (ttyname_buf);
-}
+weak_alias (ttyname_buf, __ttyname_freemem_ptr)
 
 /* Return the pathname of the terminal FD is open on, or NULL on errors.
    The returned storage is good only until the next call to this function.  */
diff --git a/time/tzfile.c b/time/tzfile.c
index 55508c154b..9e27eba4a7 100644
--- a/time/tzfile.c
+++ b/time/tzfile.c
@@ -26,6 +26,7 @@ 
 #include <sys/stat.h>
 #include <stdint.h>
 #include <alloc_buffer.h>
+#include <set-freeres.h>
 
 #include <timezone/tzfile.h>
 
@@ -50,7 +51,7 @@  struct leap
   };
 
 static size_t num_transitions;
-libc_freeres_ptr (static __time64_t *transitions);
+static __time64_t *transitions;
 static unsigned char *type_idxs;
 static size_t num_types;
 static struct ttinfo *types;
@@ -780,3 +781,5 @@  __tzfile_compute (__time64_t timer, int use_localtime,
 	}
     }
 }
+
+weak_alias (transitions, __libc_tzfile_freemem_ptr)
diff --git a/time/tzset.c b/time/tzset.c
index 3df62106d8..8c740a4e4d 100644
--- a/time/tzset.c
+++ b/time/tzset.c
@@ -610,7 +610,8 @@  __tz_convert (__time64_t timer, int use_localtime, struct tm *tp)
 }
 
 
-libc_freeres_fn (free_mem)
+void
+__libc_tzset_freemem (void)
 {
   while (tzstring_list != NULL)
     {