libstdc++-v3/src/vterminate.cc

   1 // Verbose terminate_handler -*- C++ -*-
   2
   3 // Copyright (C) 2001 Free Software Foundation
   4 //
   5 // This file is part of GNU CC.
   6 //
   7 // GNU CC 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 2, or (at your option)
  10 // any later version.
  11 //
  12 // GNU CC 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 // You should have received a copy of the GNU General Public License
  18 // along with GNU CC; see the file COPYING.  If not, write to
  19 // the Free Software Foundation, 59 Temple Place - Suite 330,
  20 // Boston, MA 02111-1307, USA.
  21
  22 // As a special exception, you may use this file as part of a free software
  23 // library without restriction.  Specifically, if other files instantiate
  24 // templates or use macros or inline functions from this file, or you compile
  25 // this file and link it with other files to produce an executable, this
  26 // file does not by itself cause the resulting executable to be covered by
  27 // the GNU General Public License.  This exception does not however
  28 // invalidate any other reasons why the executable file might be covered by
  29 // the GNU General Public License.
  30
  31 #include <exception>
  32 #include <cstdlib>
  33 #include <cstdio>
  34 #include <cxxabi.h>
  35
  36 using namespace std;
  37 using namespace abi;
  38
  39 namespace __gnu_cxx
  40 {
  41
  42 /* A replacement for the standard terminate_handler which prints
  43    more information about the terminating exception (if any) on stderr.  */
  44 void __verbose_terminate_handler ()
  45 {
  46   // Make sure there was an exception; terminate is also called for an
  47   // attempt to rethrow when there is no suitable exception.
  48   type_info *t = __cxa_current_exception_type ();
  49   if (t)
  50     {
  51       char const *name = t->name ();
  52       // Note that "name" is the mangled name.
  53
  54       {
  55         int status = -1;
  56         char *dem = 0;
  57
  58 #if 0
  59         // Disabled until __cxa_demangle gets the runtime GPL exception.
  60         dem = __cxa_demangle (name, 0, 0, &status);
  61 #endif
  62
  63         printf ("terminate called after throwing a `%s'\n",
  64                 status == 0 ? dem : name);
  65
  66         if (status == 0)
  67           free (dem);
  68       }
  69
  70       // If the exception is derived from std::exception, we can give more
  71       // information.
  72       try { throw; }
  73       catch (exception &exc)
  74         { fprintf (stderr, "  what(): %s\n", exc.what()); }
  75       catch (...) { }
  76     }
  77   else
  78     fprintf (stderr, "terminate called without an active exception\n");
  79
  80   abort ();
  81 }
  82
  83 } // namespace __gnu_cxx