1 // Exception Handling support header for -*- C++ -*- 2 3 // Copyright (C) 1995-2017 Free Software Foundation, Inc. 4 // 5 // This file is part of GCC. 6 // 7 // GCC is free software; you can redistribute it and/or modify 8 // it under the terms of the GNU General Public License as published by 9 // the Free Software Foundation; either version 3, or (at your option) 10 // any later version. 11 // 12 // GCC is distributed in the hope that it will be useful, 13 // but WITHOUT ANY WARRANTY; without even the implied warranty of 14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 // GNU General Public License for more details. 16 // 17 // Under Section 7 of GPL version 3, you are granted additional 18 // permissions described in the GCC Runtime Library Exception, version 19 // 3.1, as published by the Free Software Foundation. 20 21 // You should have received a copy of the GNU General Public License and 22 // a copy of the GCC Runtime Library Exception along with this program; 23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 // <http://www.gnu.org/licenses/>. 25 26 /** @file exception 27 * This is a Standard C++ Library header. 28 */ 29 30 #ifndef __EXCEPTION__ 31 #define __EXCEPTION__ 32 33 #pragma GCC system_header 34 35 #pragma GCC visibility push(default) 36 37 #include <bits/c++config.h> 38 #include <bits/exception.h> 39 40 extern "C++" { 41 42 namespace std 43 { 44 /** If an %exception is thrown which is not listed in a function's 45 * %exception specification, one of these may be thrown. */ 46 class bad_exception : public exception 47 { 48 public: 49 bad_exception() _GLIBCXX_USE_NOEXCEPT { } 50 51 // This declaration is not useless: 52 // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118 53 virtual ~bad_exception() _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT; 54 55 // See comment in eh_exception.cc. 56 virtual const char* 57 what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT; 58 }; 59 60 /// If you write a replacement %terminate handler, it must be of this type. 61 typedef void (*terminate_handler) (); 62 63 /// If you write a replacement %unexpected handler, it must be of this type. 64 typedef void (*unexpected_handler) (); 65 66 /// Takes a new handler function as an argument, returns the old function. 67 terminate_handler set_terminate(terminate_handler) _GLIBCXX_USE_NOEXCEPT; 68 69 #if __cplusplus >= 201103L 70 /// Return the current terminate handler. 71 terminate_handler get_terminate() noexcept; 72 #endif 73 74 /** The runtime will call this function if %exception handling must be 75 * abandoned for any reason. It can also be called by the user. */ 76 void terminate() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__noreturn__)); 77 78 /// Takes a new handler function as an argument, returns the old function. 79 unexpected_handler set_unexpected(unexpected_handler) _GLIBCXX_USE_NOEXCEPT; 80 81 #if __cplusplus >= 201103L 82 /// Return the current unexpected handler. 83 unexpected_handler get_unexpected() noexcept; 84 #endif 85 86 /** The runtime will call this function if an %exception is thrown which 87 * violates the function's %exception specification. */ 88 void unexpected() __attribute__ ((__noreturn__)); 89 90 /** [18.6.4]/1: 'Returns true after completing evaluation of a 91 * throw-expression until either completing initialization of the 92 * exception-declaration in the matching handler or entering @c unexpected() 93 * due to the throw; or after entering @c terminate() for any reason 94 * other than an explicit call to @c terminate(). [Note: This includes 95 * stack unwinding [15.2]. end note]' 96 * 97 * 2: 'When @c uncaught_exception() is true, throwing an 98 * %exception can result in a call of @c terminate() 99 * (15.5.1).' 100 */ 101 bool uncaught_exception() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__)); 102 103 #if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++98 104 #define __cpp_lib_uncaught_exceptions 201411 105 /// The number of uncaught exceptions. 106 int uncaught_exceptions() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__)); 107 #endif 108 109 // @} group exceptions 110 } // namespace std 111 112 namespace __gnu_cxx 113 { 114 _GLIBCXX_BEGIN_NAMESPACE_VERSION 115 116 /** 117 * @brief A replacement for the standard terminate_handler which 118 * prints more information about the terminating exception (if any) 119 * on stderr. 120 * 121 * @ingroup exceptions 122 * 123 * Call 124 * @code 125 * std::set_terminate(__gnu_cxx::__verbose_terminate_handler) 126 * @endcode 127 * to use. For more info, see 128 * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt02ch06s02.html 129 * 130 * In 3.4 and later, this is on by default. 131 */ 132 void __verbose_terminate_handler(); 133 134 _GLIBCXX_END_NAMESPACE_VERSION 135 } // namespace 136 137 } // extern "C++" 138 139 #pragma GCC visibility pop 140 141 #if (__cplusplus >= 201103L) 142 #include <bits/exception_ptr.h> 143 #include <bits/nested_exception.h> 144 #endif 145 146 #endif 147