vterminate.cc revision 132720 
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
37using namespace std;
38using namespace abi;
39
40namespace __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
99