1// Verbose terminate_handler -*- C++ -*-
2
3// Copyright (C) 2001-2020 Free Software Foundation, Inc.
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 <bits/exception_defines.h>
31#include <cxxabi.h>
32# include <cstdio>
33
34using namespace std;
35using namespace abi;
36
37namespace __gnu_cxx
38{
39_GLIBCXX_BEGIN_NAMESPACE_VERSION
40
41  // A replacement for the standard terminate_handler which prints
42  // more information about the terminating exception (if any) on
43  // stderr.
44  void __verbose_terminate_handler()
45  {
46    static bool terminating;
47    if (terminating)
48      {
49	fputs("terminate called recursively\n", stderr);
50	abort ();
51      }
52    terminating = true;
53
54    // Make sure there was an exception; terminate is also called for an
55    // attempt to rethrow when there is no suitable exception.
56    type_info *t = __cxa_current_exception_type();
57    if (t)
58      {
59	// Note that "name" is the mangled name.
60	char const *name = t->name();
61	{
62	  int status = -1;
63	  char *dem = 0;
64
65	  dem = __cxa_demangle(name, 0, 0, &status);
66
67	  fputs("terminate called after throwing an instance of '", stderr);
68	  if (status == 0)
69	    fputs(dem, stderr);
70	  else
71	    fputs(name, stderr);
72	  fputs("'\n", stderr);
73
74	  if (status == 0)
75	    free(dem);
76	}
77
78	// If the exception is derived from std::exception, we can
79	// give more information.
80	__try { __throw_exception_again; }
81#if __cpp_exceptions
82	__catch(const exception& exc)
83	  {
84	    char const *w = exc.what();
85	    fputs("  what():  ", stderr);
86	    fputs(w, stderr);
87	    fputs("\n", stderr);
88          }
89#endif
90	__catch(...) { }
91      }
92    else
93      fputs("terminate called without an active exception\n", stderr);
94
95    abort();
96  }
97
98_GLIBCXX_END_NAMESPACE_VERSION
99} // namespace
100
101#endif
102