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1 // -*- C++ -*- std::exception implementation.
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2 // Copyright (C) 1994-2020 Free Software Foundation, Inc.
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111
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3 //
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4 // This file is part of GCC.
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5 //
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6 // GCC is free software; you can redistribute it and/or modify
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7 // it under the terms of the GNU General Public License as published by
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8 // the Free Software Foundation; either version 3, or (at your option)
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9 // any later version.
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10 //
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11 // GCC is distributed in the hope that it will be useful,
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12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 // GNU General Public License for more details.
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15 //
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16 // Under Section 7 of GPL version 3, you are granted additional
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17 // permissions described in the GCC Runtime Library Exception, version
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18 // 3.1, as published by the Free Software Foundation.
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19
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20 // You should have received a copy of the GNU General Public License and
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21 // a copy of the GCC Runtime Library Exception along with this program;
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22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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23 // <http://www.gnu.org/licenses/>.
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24
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25 #include "typeinfo"
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26 #include "exception"
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27 #include <cxxabi.h>
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28
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29 std::exception::~exception() _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT { }
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30
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31 std::bad_exception::~bad_exception() _GLIBCXX_TXN_SAFE_DYN
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32 _GLIBCXX_USE_NOEXCEPT
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33 { }
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34
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35 abi::__forced_unwind::~__forced_unwind() throw() { }
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36
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37 abi::__foreign_exception::~__foreign_exception() throw() { }
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38
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39 const char*
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40 std::exception::what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT
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41 {
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42 // NB: Another elegant option would be returning typeid(*this).name()
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43 // and not overriding what() in bad_exception, bad_alloc, etc. In
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44 // that case, however, mangled names would be returned, PR 14493.
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45 return "std::exception";
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46 }
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47
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48 const char*
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49 std::bad_exception::what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT
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50 {
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51 return "std::bad_exception";
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52 }
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53
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54 // Transactional clones for the destructors and what().
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55 // what() is effectively transaction_pure, but we do not want to annotate it
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56 // as such; thus, we call exactly the respective nontransactional function.
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57 extern "C" {
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58
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59 void
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60 _ZGTtNKSt9exceptionD1Ev(const std::exception*)
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61 { }
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62
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63 const char*
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64 _ZGTtNKSt9exception4whatEv(const std::exception* that)
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65 {
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66 // We really want the non-virtual call here. We already executed the
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67 // indirect call representing the virtual call, and the TM runtime or the
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68 // compiler resolved it to this transactional clone. In the clone, we want
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69 // to do the same as for the nontransactional original, so we just call it.
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70 return that->std::exception::what();
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71 }
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72
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73 void
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74 _ZGTtNKSt13bad_exceptionD1Ev(
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75 const std::bad_exception*)
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76 { }
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77
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78 const char*
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79 _ZGTtNKSt13bad_exception4whatEv(
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80 const std::bad_exception* that)
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81 {
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82 // Also see _ZGTtNKSt9exception4whatEv.
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83 return that->std::bad_exception::what();
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84 }
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85
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86 }
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