vterminate.cc

00001 // Verbose terminate_handler -*- C++ -*-
00002 
00003 // Copyright (C) 2001, 2002 Free Software Foundation
00004 //
00005 // This file is part of the GNU ISO C++ Library.  This library is free
00006 // software; you can redistribute it and/or modify it under the
00007 // terms of the GNU General Public License as published by the
00008 // Free Software Foundation; either version 2, or (at your option)
00009 // any later version.
00010 
00011 // This library is distributed in the hope that it will be useful,
00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014 // GNU General Public License for more details.
00015 
00016 // You should have received a copy of the GNU General Public License along
00017 // with this library; see the file COPYING.  If not, write to the Free
00018 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
00019 // USA.
00020 
00021 // As a special exception, you may use this file as part of a free software
00022 // library without restriction.  Specifically, if other files instantiate
00023 // templates or use macros or inline functions from this file, or you compile
00024 // this file and link it with other files to produce an executable, this
00025 // file does not by itself cause the resulting executable to be covered by
00026 // the GNU General Public License.  This exception does not however
00027 // invalidate any other reasons why the executable file might be covered by
00028 // the GNU General Public License.
00029 
00030 #include <cstdlib>
00031 #include <cstdio>
00032 #include <exception>
00033 #include <exception_defines.h>
00034 #include <cxxabi.h>
00035 
00036 using namespace std;
00037 using namespace abi;
00038 
00039 namespace __gnu_cxx
00040 {
00041   /* A replacement for the standard terminate_handler which prints
00042    more information about the terminating exception (if any) on
00043    stderr.  */
00044   void __verbose_terminate_handler()
00045   {
00046     // Make sure there was an exception; terminate is also called for an
00047     // attempt to rethrow when there is no suitable exception.
00048     type_info *t = __cxa_current_exception_type();
00049     if (t)
00050       {
00051     char const *name = t->name();
00052     // Note that "name" is the mangled name.
00053     
00054     {
00055       int status = -1;
00056       char *dem = 0;
00057       
00058       // Disabled until __cxa_demangle gets the runtime GPL exception.
00059       dem = __cxa_demangle(name, 0, 0, &status);
00060 
00061       printf("terminate called after throwing a `%s'\n", 
00062          status == 0 ? dem : name);
00063 
00064       if (status == 0)
00065         free(dem);
00066     }
00067 
00068     // If the exception is derived from std::exception, we can give more
00069     // information.
00070     try { __throw_exception_again; }
00071 #ifdef __EXCEPTIONS
00072     catch (exception &exc)
00073       { fprintf(stderr, "  what(): %s\n", exc.what()); }
00074 #endif
00075     catch (...) { }
00076       }
00077     else
00078       fprintf(stderr, "terminate called without an active exception\n");
00079     
00080     abort();
00081   }
00082 } // namespace __gnu_cxx

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