1 // -*- C++ -*- 2 //===----------------------------------------------------------------------===// 3 // 4 // The LLVM Compiler Infrastructure 5 // 6 // This file is dual licensed under the MIT and the University of Illinois Open 7 // Source Licenses. See LICENSE.TXT for details. 8 // 9 //===----------------------------------------------------------------------===// 10 11 #include <cstdio> 12 13 namespace std { 14 15 _LIBCPP_SAFE_STATIC static std::terminate_handler __terminate_handler; 16 _LIBCPP_SAFE_STATIC static std::unexpected_handler __unexpected_handler; 17 18 19 // libcxxrt provides implementations of these functions itself. 20 unexpected_handler 21 set_unexpected(unexpected_handler func) _NOEXCEPT 22 { 23 return __libcpp_atomic_exchange(&__unexpected_handler, func); 24 } 25 26 unexpected_handler 27 get_unexpected() _NOEXCEPT 28 { 29 return __libcpp_atomic_load(&__unexpected_handler); 30 31 } 32 33 _LIBCPP_NORETURN 34 void unexpected() 35 { 36 (*get_unexpected())(); 37 // unexpected handler should not return 38 terminate(); 39 } 40 41 terminate_handler 42 set_terminate(terminate_handler func) _NOEXCEPT 43 { 44 return __libcpp_atomic_exchange(&__terminate_handler, func); 45 } 46 47 terminate_handler 48 get_terminate() _NOEXCEPT 49 { 50 return __libcpp_atomic_load(&__terminate_handler); 51 } 52 53 #ifndef __EMSCRIPTEN__ // We provide this in JS 54 _LIBCPP_NORETURN 55 void 56 terminate() _NOEXCEPT 57 { 58 #ifndef _LIBCPP_NO_EXCEPTIONS 59 try 60 { 61 #endif // _LIBCPP_NO_EXCEPTIONS 62 (*get_terminate())(); 63 // handler should not return 64 fprintf(stderr, "terminate_handler unexpectedly returned\n"); 65 ::abort(); 66 #ifndef _LIBCPP_NO_EXCEPTIONS 67 } 68 catch (...) 69 { 70 // handler should not throw exception 71 fprintf(stderr, "terminate_handler unexpectedly threw an exception\n"); 72 ::abort(); 73 } 74 #endif // _LIBCPP_NO_EXCEPTIONS 75 } 76 #endif // !__EMSCRIPTEN__ 77 78 #if !defined(__EMSCRIPTEN__) 79 bool uncaught_exception() _NOEXCEPT { return uncaught_exceptions() > 0; } 80 81 int uncaught_exceptions() _NOEXCEPT 82 { 83 #warning uncaught_exception not yet implemented 84 fprintf(stderr, "uncaught_exceptions not yet implemented\n"); 85 ::abort(); 86 } 87 #endif // !__EMSCRIPTEN__ 88 89 90 exception::~exception() _NOEXCEPT 91 { 92 } 93 94 const char* exception::what() const _NOEXCEPT 95 { 96 return "std::exception"; 97 } 98 99 bad_exception::~bad_exception() _NOEXCEPT 100 { 101 } 102 103 const char* bad_exception::what() const _NOEXCEPT 104 { 105 return "std::bad_exception"; 106 } 107 108 109 bad_alloc::bad_alloc() _NOEXCEPT 110 { 111 } 112 113 bad_alloc::~bad_alloc() _NOEXCEPT 114 { 115 } 116 117 const char* 118 bad_alloc::what() const _NOEXCEPT 119 { 120 return "std::bad_alloc"; 121 } 122 123 bad_array_new_length::bad_array_new_length() _NOEXCEPT 124 { 125 } 126 127 bad_array_new_length::~bad_array_new_length() _NOEXCEPT 128 { 129 } 130 131 const char* 132 bad_array_new_length::what() const _NOEXCEPT 133 { 134 return "bad_array_new_length"; 135 } 136 137 bad_cast::bad_cast() _NOEXCEPT 138 { 139 } 140 141 bad_typeid::bad_typeid() _NOEXCEPT 142 { 143 } 144 145 bad_cast::~bad_cast() _NOEXCEPT 146 { 147 } 148 149 const char* 150 bad_cast::what() const _NOEXCEPT 151 { 152 return "std::bad_cast"; 153 } 154 155 bad_typeid::~bad_typeid() _NOEXCEPT 156 { 157 } 158 159 const char* 160 bad_typeid::what() const _NOEXCEPT 161 { 162 return "std::bad_typeid"; 163 } 164 165 } // namespace std 166
