/* Copyright (C) 2003, 2005, 2006 Free Software Foundation, Inc.   This file is part of the GNU C Library.   Contributed by Jakub Jelinek <jakub@redhat.com>.   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; see the file COPYING.LIB.  If not,   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,   Boston, MA 02111-1307, USA.  */#include <dlfcn.h>#include <stdio.h>#include <unwind.h>#include <pthreadP.h>static void (*libgcc_s_resume) (struct _Unwind_Exception *exc);static _Unwind_Reason_Code (*libgcc_s_personality)  (int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *,   struct _Unwind_Context *);static _Unwind_Reason_Code (*libgcc_s_forcedunwind)  (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *);static _Unwind_Word (*libgcc_s_getcfa) (struct _Unwind_Context *);void__attribute_noinline__pthread_cancel_init (void){  void *resume, *personality, *forcedunwind, *getcfa;  void *handle;  if (__builtin_expect (libgcc_s_getcfa != NULL, 1))    {      /* Force gcc to reload all values.  */      asm volatile ("" ::: "memory");      return;    }  handle = __libc_dlopen ("libgcc_s.so.1");  if (handle == NULL      || (resume = __libc_dlsym (handle, "_Unwind_Resume")) == NULL      || (personality = __libc_dlsym (handle, "__gcc_personality_v0")) == NULL      || (forcedunwind = __libc_dlsym (handle, "_Unwind_ForcedUnwind"))	 == NULL      || (getcfa = __libc_dlsym (handle, "_Unwind_GetCFA")) == NULL#ifdef ARCH_CANCEL_INIT      || ARCH_CANCEL_INIT (handle)#endif      )    __libc_fatal ("libgcc_s.so.1 must be installed for pthread_cancel to work\n");  libgcc_s_resume = resume;  libgcc_s_personality = personality;  libgcc_s_forcedunwind = forcedunwind;  /* Make sure libgcc_s_getcfa is written last.  Otherwise,     pthread_cancel_init might return early even when the pointer the     caller is interested in is not initialized yet.  */  atomic_write_barrier ();  libgcc_s_getcfa = getcfa;}void_Unwind_Resume (struct _Unwind_Exception *exc){  if (__builtin_expect (libgcc_s_resume == NULL, 0))    pthread_cancel_init ();  libgcc_s_resume (exc);}_Unwind_Reason_Code__gcc_personality_v0 (int version, _Unwind_Action actions,		      _Unwind_Exception_Class exception_class,                      struct _Unwind_Exception *ue_header,                      struct _Unwind_Context *context){  if (__builtin_expect (libgcc_s_personality == NULL, 0))    pthread_cancel_init ();  return libgcc_s_personality (version, actions, exception_class,			       ue_header, context);}_Unwind_Reason_Code_Unwind_ForcedUnwind (struct _Unwind_Exception *exc, _Unwind_Stop_Fn stop,		      void *stop_argument){  if (__builtin_expect (libgcc_s_forcedunwind == NULL, 0))    pthread_cancel_init ();  return libgcc_s_forcedunwind (exc, stop, stop_argument);}_Unwind_Word_Unwind_GetCFA (struct _Unwind_Context *context){  if (__builtin_expect (libgcc_s_getcfa == NULL, 0))    pthread_cancel_init ();  return libgcc_s_getcfa (context);}