1  /* Free resources stored in thread-local variables on thread exit.
       2     Copyright (C) 2003-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <libc-internal.h>
      20  #include <malloc-internal.h>
      21  #include <set-freeres.h>
      22  #include <shlib-compat.h>
      23  #include <tls-internal.h>
      24  
      25  /* Thread shutdown function.  Note that this function must be called
      26     for threads during shutdown for correctness reasons.  Unlike
      27     __libc_freeres, skipping calls to it is not a valid optimization.
      28     This is called directly from pthread_create as the thread exits.  */
      29  void
      30  __libc_thread_freeres (void)
      31  {
      32  #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_32)
      33    __rpc_thread_destroy ();
      34  #endif
      35    call_function_static_weak (__res_thread_freeres);
      36    call_function_static_weak (__glibc_tls_internal_free);
      37    call_function_static_weak (__libc_dlerror_result_free);
      38  
      39    /* This should come last because it shuts down malloc for this
      40       thread and the other shutdown functions might well call free.  */
      41    call_function_static_weak (__malloc_arena_thread_freeres);
      42  }