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glibc  2.9
unwind-forcedunwind.c
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00001 /* Copyright (C) 2003, 2006 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Jakub Jelinek <jakub@redhat.com>.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public License as
00007    published by the Free Software Foundation; either version 2.1 of the
00008    License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; see the file COPYING.LIB.  If not,
00017    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00018    Boston, MA 02111-1307, USA.  */
00019 
00020 #include <dlfcn.h>
00021 #include <stdio.h>
00022 #include <unwind.h>
00023 #include <pthreadP.h>
00024 
00025 static _Unwind_Word (*libgcc_s_getbsp) (struct _Unwind_Context *);
00026 
00027 #define ARCH_CANCEL_INIT(handle) \
00028   ((libgcc_s_getbsp = __libc_dlsym (handle, "_Unwind_GetBSP")) == NULL)
00029 
00030 #include <sysdeps/pthread/unwind-forcedunwind.c>
00031 
00032 _Unwind_Word
00033 _Unwind_GetBSP (struct _Unwind_Context *context)
00034 {
00035   if (__builtin_expect (libgcc_s_getbsp == NULL, 0))
00036     pthread_cancel_init ();
00037 
00038   return libgcc_s_getbsp (context);
00039 }