1 // -*- C++ -*- Exception handling routines for catching. 2 // Copyright (C) 2001-2018 Free Software Foundation, Inc. 3 // 4 // This file is part of GCC. 5 // 6 // GCC is free software; you can redistribute it and/or modify 7 // it under the terms of the GNU General Public License as published by 8 // the Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 // 11 // GCC is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 // 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 26 #include <typeinfo> 27 #include <cxxabi.h> 28 #include "unwind-cxx.h" 29 30 namespace __cxxabiv1 31 { 32 33 // Returns the type_info for the currently handled exception [15.3/8], or 34 // null if there is none. 35 extern "C" 36 std::type_info *__cxa_current_exception_type () _GLIBCXX_NOTHROW 37 { 38 __cxa_eh_globals *globals = __cxa_get_globals (); 39 __cxa_exception *header = globals->caughtExceptions; 40 if (header) 41 { 42 if (__is_dependent_exception (header->unwindHeader.exception_class)) 43 { 44 __cxa_dependent_exception *de = 45 __get_dependent_exception_from_ue (&header->unwindHeader); 46 header = __get_exception_header_from_obj (de->primaryException); 47 } 48 return header->exceptionType; 49 } 50 else 51 return 0; 52 } 53 54 } // namespace __cxxabiv1 55