1 // Debugging mode support code -*- C++ -*-
3 // Copyright (C) 2003, 2004, 2005, 2006, 2007
4 // Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 2, or (at your option)
12 // This library 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.
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING. If not, write to the Free
19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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.
31 #include <debug/debug.h>
32 #include <debug/safe_sequence.h>
33 #include <debug/safe_iterator.h>
44 __gnu_cxx::__mutex safe_base_mutex;
45 } // anonymous namespace
49 const char* _S_debug_messages[] =
51 "function requires a valid iterator range [%1.name;, %2.name;)",
52 "attempt to insert into container with a singular iterator",
53 "attempt to insert into container with an iterator"
54 " from a different container",
55 "attempt to erase from container with a %2.state; iterator",
56 "attempt to erase from container with an iterator"
57 " from a different container",
58 "attempt to subscript container with out-of-bounds index %2;,"
59 " but container only holds %3; elements",
60 "attempt to access an element in an empty container",
61 "elements in iterator range [%1.name;, %2.name;)"
62 " are not partitioned by the value %3;",
63 "elements in iterator range [%1.name;, %2.name;)"
64 " are not partitioned by the predicate %3; and value %4;",
65 "elements in iterator range [%1.name;, %2.name;) are not sorted",
66 "elements in iterator range [%1.name;, %2.name;)"
67 " are not sorted according to the predicate %3;",
68 "elements in iterator range [%1.name;, %2.name;) do not form a heap",
69 "elements in iterator range [%1.name;, %2.name;)"
70 " do not form a heap with respect to the predicate %3;",
71 "attempt to write through a singular bitset reference",
72 "attempt to read from a singular bitset reference",
73 "attempt to flip a singular bitset reference",
74 "attempt to splice a list into itself",
75 "attempt to splice lists with inequal allocators",
76 "attempt to splice elements referenced by a %1.state; iterator",
77 "attempt to splice an iterator from a different container",
78 "splice destination %1.name;"
79 " occurs within source range [%2.name;, %3.name;)",
80 "attempt to initialize an iterator that will immediately become singular",
81 "attempt to copy-construct an iterator from a singular iterator",
82 "attempt to construct a constant iterator"
83 " from a singular mutable iterator",
84 "attempt to copy from a singular iterator",
85 "attempt to dereference a %1.state; iterator",
86 "attempt to increment a %1.state; iterator",
87 "attempt to decrement a %1.state; iterator",
88 "attempt to subscript a %1.state; iterator %2; step from"
89 " its current position, which falls outside its dereferenceable range",
90 "attempt to advance a %1.state; iterator %2; steps,"
91 " which falls outside its valid range",
92 "attempt to retreat a %1.state; iterator %2; steps,"
93 " which falls outside its valid range",
94 "attempt to compare a %1.state; iterator to a %2.state; iterator",
95 "attempt to compare iterators from different sequences",
96 "attempt to order a %1.state; iterator to a %2.state; iterator",
97 "attempt to order iterators from different sequences",
98 "attempt to compute the difference between a %1.state;"
99 " iterator to a %2.state; iterator",
100 "attempt to compute the different between two iterators"
101 " from different sequences",
102 "attempt to dereference an end-of-stream istream_iterator",
103 "attempt to increment an end-of-stream istream_iterator",
104 "attempt to output via an ostream_iterator with no associated stream",
105 "attempt to dereference an end-of-stream istreambuf_iterator"
106 " (this is a GNU extension)",
107 "attempt to increment an end-of-stream istreambuf_iterator"
111 _Safe_sequence_base::
114 __gnu_cxx::__scoped_lock sentry(safe_base_mutex);
115 for (_Safe_iterator_base* __iter = _M_iterators; __iter;)
117 _Safe_iterator_base* __old = __iter;
118 __iter = __iter->_M_next;
119 __old->_M_detach_single();
122 for (_Safe_iterator_base* __iter2 = _M_const_iterators; __iter2;)
124 _Safe_iterator_base* __old = __iter2;
125 __iter2 = __iter2->_M_next;
126 __old->_M_detach_single();
131 _Safe_sequence_base::
134 __gnu_cxx::__scoped_lock sentry(safe_base_mutex);
135 for (_Safe_iterator_base* __iter = _M_iterators; __iter;)
137 _Safe_iterator_base* __old = __iter;
138 __iter = __iter->_M_next;
139 if (__old->_M_singular())
140 __old->_M_detach_single();
143 for (_Safe_iterator_base* __iter2 = _M_const_iterators; __iter2;)
145 _Safe_iterator_base* __old = __iter2;
146 __iter2 = __iter2->_M_next;
147 if (__old->_M_singular())
148 __old->_M_detach_single();
153 _Safe_sequence_base::
154 _M_revalidate_singular()
156 __gnu_cxx::__scoped_lock sentry(safe_base_mutex);
157 for (_Safe_iterator_base* __iter = _M_iterators; __iter;
158 __iter = __iter->_M_next)
159 __iter->_M_version = _M_version;
161 for (_Safe_iterator_base* __iter2 = _M_const_iterators; __iter2;
162 __iter2 = __iter2->_M_next)
163 __iter2->_M_version = _M_version;
167 _Safe_sequence_base::
168 _M_swap(_Safe_sequence_base& __x)
170 __gnu_cxx::__scoped_lock sentry(safe_base_mutex);
171 swap(_M_iterators, __x._M_iterators);
172 swap(_M_const_iterators, __x._M_const_iterators);
173 swap(_M_version, __x._M_version);
174 _Safe_iterator_base* __iter;
175 for (__iter = _M_iterators; __iter; __iter = __iter->_M_next)
176 __iter->_M_sequence = this;
177 for (__iter = __x._M_iterators; __iter; __iter = __iter->_M_next)
178 __iter->_M_sequence = &__x;
179 for (__iter = _M_const_iterators; __iter; __iter = __iter->_M_next)
180 __iter->_M_sequence = this;
181 for (__iter = __x._M_const_iterators; __iter; __iter = __iter->_M_next)
182 __iter->_M_sequence = &__x;
186 _Safe_sequence_base::
188 { return safe_base_mutex; }
191 _Safe_iterator_base::
192 _M_attach(_Safe_sequence_base* __seq, bool __constant)
194 __gnu_cxx::__scoped_lock sentry(safe_base_mutex);
195 _M_attach_single(__seq, __constant);
199 _Safe_iterator_base::
200 _M_attach_single(_Safe_sequence_base* __seq, bool __constant)
204 // Attach to the new sequence (if there is one)
208 _M_version = _M_sequence->_M_version;
212 _M_next = _M_sequence->_M_const_iterators;
214 _M_next->_M_prior = this;
215 _M_sequence->_M_const_iterators = this;
219 _M_next = _M_sequence->_M_iterators;
221 _M_next->_M_prior = this;
222 _M_sequence->_M_iterators = this;
228 _Safe_iterator_base::
231 __gnu_cxx::__scoped_lock sentry(safe_base_mutex);
236 _Safe_iterator_base::
241 // Remove us from this sequence's list
243 _M_prior->_M_next = _M_next;
245 _M_next->_M_prior = _M_prior;
247 if (_M_sequence->_M_const_iterators == this)
248 _M_sequence->_M_const_iterators = _M_next;
249 if (_M_sequence->_M_iterators == this)
250 _M_sequence->_M_iterators = _M_next;
260 _Safe_iterator_base::
262 { return !_M_sequence || _M_version != _M_sequence->_M_version; }
265 _Safe_iterator_base::
266 _M_can_compare(const _Safe_iterator_base& __x) const
268 return (!_M_singular()
269 && !__x._M_singular() && _M_sequence == __x._M_sequence);
273 _Safe_iterator_base::
275 { return safe_base_mutex; }
278 _Error_formatter::_Parameter::
279 _M_print_field(const _Error_formatter* __formatter, const char* __name) const
281 assert(this->_M_kind != _Parameter::__unused_param);
282 const int __bufsize = 64;
283 char __buf[__bufsize];
285 if (_M_kind == __iterator)
287 if (strcmp(__name, "name") == 0)
289 assert(_M_variant._M_iterator._M_name);
290 __formatter->_M_print_word(_M_variant._M_iterator._M_name);
292 else if (strcmp(__name, "address") == 0)
294 __formatter->_M_format_word(__buf, __bufsize, "%p",
295 _M_variant._M_iterator._M_address);
296 __formatter->_M_print_word(__buf);
298 else if (strcmp(__name, "type") == 0)
300 assert(_M_variant._M_iterator._M_type);
302 __formatter->_M_print_word(_M_variant._M_iterator._M_type->name());
304 else if (strcmp(__name, "constness") == 0)
306 static const char* __constness_names[__last_constness] =
312 __formatter->_M_print_word(__constness_names[_M_variant._M_iterator._M_constness]);
314 else if (strcmp(__name, "state") == 0)
316 static const char* __state_names[__last_state] =
320 "dereferenceable (start-of-sequence)",
324 __formatter->_M_print_word(__state_names[_M_variant._M_iterator._M_state]);
326 else if (strcmp(__name, "sequence") == 0)
328 assert(_M_variant._M_iterator._M_sequence);
329 __formatter->_M_format_word(__buf, __bufsize, "%p",
330 _M_variant._M_iterator._M_sequence);
331 __formatter->_M_print_word(__buf);
333 else if (strcmp(__name, "seq_type") == 0)
336 assert(_M_variant._M_iterator._M_seq_type);
337 __formatter->_M_print_word(_M_variant._M_iterator._M_seq_type->name());
342 else if (_M_kind == __sequence)
344 if (strcmp(__name, "name") == 0)
346 assert(_M_variant._M_sequence._M_name);
347 __formatter->_M_print_word(_M_variant._M_sequence._M_name);
349 else if (strcmp(__name, "address") == 0)
351 assert(_M_variant._M_sequence._M_address);
352 __formatter->_M_format_word(__buf, __bufsize, "%p",
353 _M_variant._M_sequence._M_address);
354 __formatter->_M_print_word(__buf);
356 else if (strcmp(__name, "type") == 0)
359 assert(_M_variant._M_sequence._M_type);
360 __formatter->_M_print_word(_M_variant._M_sequence._M_type->name());
365 else if (_M_kind == __integer)
367 if (strcmp(__name, "name") == 0)
369 assert(_M_variant._M_integer._M_name);
370 __formatter->_M_print_word(_M_variant._M_integer._M_name);
375 else if (_M_kind == __string)
377 if (strcmp(__name, "name") == 0)
379 assert(_M_variant._M_string._M_name);
380 __formatter->_M_print_word(_M_variant._M_string._M_name);
392 _Error_formatter::_Parameter::
393 _M_print_description(const _Error_formatter* __formatter) const
395 const int __bufsize = 128;
396 char __buf[__bufsize];
398 if (_M_kind == __iterator)
400 __formatter->_M_print_word("iterator ");
401 if (_M_variant._M_iterator._M_name)
403 __formatter->_M_format_word(__buf, __bufsize, "\"%s\" ",
404 _M_variant._M_iterator._M_name);
405 __formatter->_M_print_word(__buf);
408 __formatter->_M_format_word(__buf, __bufsize, "@ 0x%p {\n",
409 _M_variant._M_iterator._M_address);
410 __formatter->_M_print_word(__buf);
411 if (_M_variant._M_iterator._M_type)
413 __formatter->_M_print_word("type = ");
414 _M_print_field(__formatter, "type");
416 if (_M_variant._M_iterator._M_constness != __unknown_constness)
418 __formatter->_M_print_word(" (");
419 _M_print_field(__formatter, "constness");
420 __formatter->_M_print_word(" iterator)");
422 __formatter->_M_print_word(";\n");
425 if (_M_variant._M_iterator._M_state != __unknown_state)
427 __formatter->_M_print_word(" state = ");
428 _M_print_field(__formatter, "state");
429 __formatter->_M_print_word(";\n");
432 if (_M_variant._M_iterator._M_sequence)
434 __formatter->_M_print_word(" references sequence ");
435 if (_M_variant._M_iterator._M_seq_type)
437 __formatter->_M_print_word("with type `");
438 _M_print_field(__formatter, "seq_type");
439 __formatter->_M_print_word("' ");
442 __formatter->_M_format_word(__buf, __bufsize, "@ 0x%p\n",
443 _M_variant._M_sequence._M_address);
444 __formatter->_M_print_word(__buf);
446 __formatter->_M_print_word("}\n");
448 else if (_M_kind == __sequence)
450 __formatter->_M_print_word("sequence ");
451 if (_M_variant._M_sequence._M_name)
453 __formatter->_M_format_word(__buf, __bufsize, "\"%s\" ",
454 _M_variant._M_sequence._M_name);
455 __formatter->_M_print_word(__buf);
458 __formatter->_M_format_word(__buf, __bufsize, "@ 0x%p {\n",
459 _M_variant._M_sequence._M_address);
460 __formatter->_M_print_word(__buf);
462 if (_M_variant._M_sequence._M_type)
464 __formatter->_M_print_word(" type = ");
465 _M_print_field(__formatter, "type");
466 __formatter->_M_print_word(";\n");
468 __formatter->_M_print_word("}\n");
472 const _Error_formatter&
473 _Error_formatter::_M_message(_Debug_msg_id __id) const
474 { return this->_M_message(_S_debug_messages[__id]); }
477 _Error_formatter::_M_error() const
479 const int __bufsize = 128;
480 char __buf[__bufsize];
482 // Emit file & line number information
487 _M_format_word(__buf, __bufsize, "%s:", _M_file);
488 _M_print_word(__buf);
489 _M_column += strlen(__buf);
494 _M_format_word(__buf, __bufsize, "%u:", _M_line);
495 _M_print_word(__buf);
496 _M_column += strlen(__buf);
500 _M_print_word("error: ");
502 // Print the error message
504 _M_print_string(_M_text);
505 _M_print_word(".\n");
507 // Emit descriptions of the objects involved in the operation
509 bool __has_noninteger_parameters = false;
510 for (unsigned int __i = 0; __i < _M_num_parameters; ++__i)
512 if (_M_parameters[__i]._M_kind == _Parameter::__iterator
513 || _M_parameters[__i]._M_kind == _Parameter::__sequence)
515 if (!__has_noninteger_parameters)
517 _M_first_line = true;
518 _M_print_word("\nObjects involved in the operation:\n");
519 __has_noninteger_parameters = true;
521 _M_parameters[__i]._M_print_description(this);
528 template<typename _Tp>
530 _Error_formatter::_M_format_word(char* __buf,
531 int __n __attribute__ ((__unused__)),
532 const char* __fmt, _Tp __s) const
534 #ifdef _GLIBCXX_USE_C99
535 std::snprintf(__buf, __n, __fmt, __s);
537 std::sprintf(__buf, __fmt, __s);
543 _Error_formatter::_M_print_word(const char* __word) const
547 fprintf(stderr, "%s", __word);
551 size_t __length = strlen(__word);
555 if ((_M_column + __length < _M_max_length)
556 || (__length >= _M_max_length && _M_column == 1))
558 // If this isn't the first line, indent
559 if (_M_column == 1 && !_M_first_line)
561 char __spacing[_M_indent + 1];
562 for (int i = 0; i < _M_indent; ++i)
564 __spacing[_M_indent] = '\0';
565 fprintf(stderr, "%s", __spacing);
566 _M_column += _M_indent;
569 fprintf(stderr, "%s", __word);
570 _M_column += __length;
572 if (__word[__length - 1] == '\n')
574 _M_first_line = false;
582 _M_print_word(__word);
588 _M_print_string(const char* __string) const
590 const char* __start = __string;
591 const char* __finish = __start;
592 const int __bufsize = 128;
593 char __buf[__bufsize];
599 // [__start, __finish) denotes the next word
601 while (isalnum(*__finish))
603 if (__start == __finish)
605 if (isspace(*__finish))
608 const ptrdiff_t __len = __finish - __start;
609 assert(__len < __bufsize);
610 memcpy(__buf, __start, __len);
612 _M_print_word(__buf);
615 // Skip extra whitespace
616 while (*__start == ' ')
631 // Get the parameter number
632 assert(*__start >= '1' && *__start <= '9');
633 size_t __param = *__start - '0';
635 assert(__param < _M_num_parameters);
637 // '.' separates the parameter number from the field
638 // name, if there is one.
642 assert(*__start == ';');
645 if (_M_parameters[__param]._M_kind == _Parameter::__integer)
647 _M_format_word(__buf, __bufsize, "%ld",
648 _M_parameters[__param]._M_variant._M_integer._M_value);
649 _M_print_word(__buf);
651 else if (_M_parameters[__param]._M_kind == _Parameter::__string)
652 _M_print_string(_M_parameters[__param]._M_variant._M_string._M_value);
656 // Extract the field name we want
657 enum { __max_field_len = 16 };
658 char __field[__max_field_len];
661 while (*__start != ';')
664 assert(__field_idx < __max_field_len-1);
665 __field[__field_idx++] = *__start++;
668 __field[__field_idx] = 0;
670 _M_parameters[__param]._M_print_field(this, __field);
677 _Error_formatter::_M_format_word(char*, int, const char*,
682 _Error_formatter::_M_format_word(char*, int, const char*, long) const;
686 _Error_formatter::_M_format_word(char*, int, const char*,
691 _Error_formatter::_M_format_word(char*, int, const char*,
693 } // namespace __gnu_debug