1 // Verbose terminate_handler -*- C++ -*- 2 3 // Copyright (C) 2001-2020 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // This library 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 <bits/c++config.h> 26 27 #if _GLIBCXX_HOSTED 28 #include <cstdlib> 29 #include <exception> 30 #include <bits/exception_defines.h> 31 #include <cxxabi.h> 32 # include <cstdio> 33 34 using namespace std; 35 using namespace abi; 36 37 namespace __gnu_cxx 38 { 39 _GLIBCXX_BEGIN_NAMESPACE_VERSION 40 41 // A replacement for the standard terminate_handler which prints 42 // more information about the terminating exception (if any) on 43 // stderr. __verbose_terminate_handler()44 void __verbose_terminate_handler() 45 { 46 static bool terminating; 47 if (terminating) 48 { 49 fputs("terminate called recursively\n", stderr); 50 abort (); 51 } 52 terminating = true; 53 54 // Make sure there was an exception; terminate is also called for an 55 // attempt to rethrow when there is no suitable exception. 56 type_info *t = __cxa_current_exception_type(); 57 if (t) 58 { 59 // Note that "name" is the mangled name. 60 char const *name = t->name(); 61 { 62 int status = -1; 63 char *dem = 0; 64 65 dem = __cxa_demangle(name, 0, 0, &status); 66 67 fputs("terminate called after throwing an instance of '", stderr); 68 if (status == 0) 69 fputs(dem, stderr); 70 else 71 fputs(name, stderr); 72 fputs("'\n", stderr); 73 74 if (status == 0) 75 free(dem); 76 } 77 78 // If the exception is derived from std::exception, we can 79 // give more information. 80 __try { __throw_exception_again; } 81 #if __cpp_exceptions 82 __catch(const exception& exc) 83 { 84 char const *w = exc.what(); 85 fputs(" what(): ", stderr); 86 fputs(w, stderr); 87 fputs("\n", stderr); 88 } 89 #endif 90 __catch(...) { } 91 } 92 else 93 fputs("terminate called without an active exception\n", stderr); 94 95 abort(); 96 } 97 98 _GLIBCXX_END_NAMESPACE_VERSION 99 } // namespace 100 101 #endif 102