libstdc++-v3/libsupc++/vterminate.cc

   1 // Verbose terminate_handler -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2002, 2004, 2005 Free Software Foundation
   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 2, 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 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 #include <bits/c++config.h>
  31
  32 #if _GLIBCXX_HOSTED
  33 #include <cstdlib>
  34 #include <exception>
  35 #include <exception_defines.h>
  36 #include <cxxabi.h>
  37 # include <cstdio>
  38
  39 using namespace std;
  40 using namespace abi;
  41
  42 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
  43
  44   // A replacement for the standard terminate_handler which prints
  45   // more information about the terminating exception (if any) on
  46   // stderr.
  47   void __verbose_terminate_handler()
  48   {
  49     static bool terminating;
  50     if (terminating)
  51       {
  52         fputs("terminate called recursively\n", stderr);
  53         abort ();
  54       }
  55     terminating = true;
  56
  57     // Make sure there was an exception; terminate is also called for an
  58     // attempt to rethrow when there is no suitable exception.
  59     type_info *t = __cxa_current_exception_type();
  60     if (t)
  61       {
  62         // Note that "name" is the mangled name.
  63         char const *name = t->name();
  64         {
  65           int status = -1;
  66           char *dem = 0;
  67
  68           dem = __cxa_demangle(name, 0, 0, &status);
  69
  70           fputs("terminate called after throwing an instance of '", stderr);
  71           if (status == 0)
  72             fputs(dem, stderr);
  73           else
  74             fputs(name, stderr);
  75           fputs("'\n", stderr);
  76
  77           if (status == 0)
  78             free(dem);
  79         }
  80
  81         // If the exception is derived from std::exception, we can
  82         // give more information.
  83         try { __throw_exception_again; }
  84 #ifdef __EXCEPTIONS
  85         catch (exception &exc)
  86           {
  87             char const *w = exc.what();
  88             fputs("  what():  ", stderr);
  89             fputs(w, stderr);
  90             fputs("\n", stderr);
  91           }
  92 #endif
  93         catch (...) { }
  94       }
  95     else
  96       fputs("terminate called without an active exception\n", stderr);
  97
  98     abort();
  99   }
 100
 101 _GLIBCXX_END_NAMESPACE
 102
 103 #endif