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

   1 // Verbose terminate_handler -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2002, 2004, 2005, 2009 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 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 <exception_defines.h>
  31 #include <cxxabi.h>
  32 # include <cstdio>
  33
  34 using namespace std;
  35 using namespace abi;
  36
  37 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
  38
  39   // A replacement for the standard terminate_handler which prints
  40   // more information about the terminating exception (if any) on
  41   // stderr.
  42   void __verbose_terminate_handler()
  43   {
  44     static bool terminating;
  45     if (terminating)
  46       {
  47         fputs("terminate called recursively\n", stderr);
  48         abort ();
  49       }
  50     terminating = true;
  51
  52     // Make sure there was an exception; terminate is also called for an
  53     // attempt to rethrow when there is no suitable exception.
  54     type_info *t = __cxa_current_exception_type();
  55     if (t)
  56       {
  57         // Note that "name" is the mangled name.
  58         char const *name = t->name();
  59         {
  60           int status = -1;
  61           char *dem = 0;
  62
  63           dem = __cxa_demangle(name, 0, 0, &status);
  64
  65           fputs("terminate called after throwing an instance of '", stderr);
  66           if (status == 0)
  67             fputs(dem, stderr);
  68           else
  69             fputs(name, stderr);
  70           fputs("'\n", stderr);
  71
  72           if (status == 0)
  73             free(dem);
  74         }
  75
  76         // If the exception is derived from std::exception, we can
  77         // give more information.
  78         __try { __throw_exception_again; }
  79 #ifdef __EXCEPTIONS
  80         __catch(const exception& exc)
  81           {
  82             char const *w = exc.what();
  83             fputs("  what():  ", stderr);
  84             fputs(w, stderr);
  85             fputs("\n", stderr);
  86           }
  87 #endif
  88         __catch(...) { }
  89       }
  90     else
  91       fputs("terminate called without an active exception\n", stderr);
  92
  93     abort();
  94   }
  95
  96 _GLIBCXX_END_NAMESPACE
  97
  98 #endif