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

   1 // Verbose terminate_handler -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2002, 2004 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  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 #include <cstdlib>
  32 #include <exception>
  33 #include <exception_defines.h>
  34 #include <cxxabi.h>
  35 # include <cstdio>
  36
  37 using namespace std;
  38 using namespace abi;
  39
  40 namespace __gnu_cxx
  41 {
  42   // A replacement for the standard terminate_handler which prints
  43   // more information about the terminating exception (if any) on
  44   // stderr.
  45   void __verbose_terminate_handler()
  46   {
  47     static bool terminating;
  48     if (terminating)
  49       {
  50         fputs("terminate called recursively\n", stderr);
  51         abort ();
  52       }
  53     terminating = true;
  54
  55     // Make sure there was an exception; terminate is also called for an
  56     // attempt to rethrow when there is no suitable exception.
  57     type_info *t = __cxa_current_exception_type();
  58     if (t)
  59       {
  60         // Note that "name" is the mangled name.
  61         char const *name = t->name();
  62         {
  63           int status = -1;
  64           char *dem = 0;
  65
  66           dem = __cxa_demangle(name, 0, 0, &status);
  67
  68           fputs("terminate called after throwing an instance of '", stderr);
  69           if (status == 0)
  70             fputs(dem, stderr);
  71           else
  72             fputs(name, stderr);
  73           fputs("'\n", stderr);
  74
  75           if (status == 0)
  76             free(dem);
  77         }
  78
  79         // If the exception is derived from std::exception, we can
  80         // give more information.
  81         try { __throw_exception_again; }
  82 #ifdef __EXCEPTIONS
  83         catch (exception &exc)
  84           {
  85             char const *w = exc.what();
  86             fputs("  what():  ", stderr);
  87             fputs(w, stderr);
  88             fputs("\n", stderr);
  89           }
  90 #endif
  91         catch (...) { }
  92       }
  93     else
  94       fputs("terminate called without an active exception\n", stderr);
  95
  96     abort();
  97   }
  98 } // namespace __gnu_cxx