1 // -*- C++ -*- std::exception implementation. 2 // Copyright (C) 1994-2018 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 #include "typeinfo" 26 #include "exception" 27 #include <cxxabi.h> 28 29 std::exception::~exception() _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT { } 30 31 std::bad_exception::~bad_exception() _GLIBCXX_TXN_SAFE_DYN 32 _GLIBCXX_USE_NOEXCEPT 33 { } 34 35 abi::__forced_unwind::~__forced_unwind() throw() { } 36 37 abi::__foreign_exception::~__foreign_exception() throw() { } 38 39 const char* 40 std::exception::what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT 41 { 42 // NB: Another elegant option would be returning typeid(*this).name() 43 // and not overriding what() in bad_exception, bad_alloc, etc. In 44 // that case, however, mangled names would be returned, PR 14493. 45 return "std::exception"; 46 } 47 48 const char* 49 std::bad_exception::what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT 50 { 51 return "std::bad_exception"; 52 } 53 54 // Transactional clones for the destructors and what(). 55 // what() is effectively transaction_pure, but we do not want to annotate it 56 // as such; thus, we call exactly the respective nontransactional function. 57 extern "C" { 58 59 void 60 _ZGTtNKSt9exceptionD1Ev(const std::exception*) 61 { } 62 63 const char* 64 _ZGTtNKSt9exception4whatEv(const std::exception* that) 65 { 66 // We really want the non-virtual call here. We already executed the 67 // indirect call representing the virtual call, and the TM runtime or the 68 // compiler resolved it to this transactional clone. In the clone, we want 69 // to do the same as for the nontransactional original, so we just call it. 70 return that->std::exception::what(); 71 } 72 73 void 74 _ZGTtNKSt13bad_exceptionD1Ev( 75 const std::bad_exception*) 76 { } 77 78 const char* 79 _ZGTtNKSt13bad_exception4whatEv( 80 const std::bad_exception* that) 81 { 82 // Also see _ZGTtNKSt9exception4whatEv. 83 return that->std::bad_exception::what(); 84 } 85 86 } 87