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1 // Debugging support implementation -*- C++ -*-
2
3 // Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4 // Free Software Foundation, Inc.
5 //
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 3, or (at your option)
10 // any later version.
11
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.
16
17 // Under Section 7 of GPL version 3, you are granted additional
18 // permissions described in the GCC Runtime Library Exception, version
19 // 3.1, as published by the Free Software Foundation.
20
21 // You should have received a copy of the GNU General Public License and
22 // a copy of the GCC Runtime Library Exception along with this program;
23 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
24 // <http://www.gnu.org/licenses/>.
25
26 /** @file debug/macros.h
27  *  This file is a GNU debug extension to the Standard C++ Library.
28  */
29
30 #ifndef _GLIBCXX_DEBUG_MACROS_H
31 #define _GLIBCXX_DEBUG_MACROS_H 1
32
33 /**
34  * Macros used by the implementation to verify certain
35  * properties. These macros may only be used directly by the debug
36  * wrappers. Note that these are macros (instead of the more obviously
37  * @a correct choice of making them functions) because we need line and
38  * file information at the call site, to minimize the distance between
39  * the user error and where the error is reported.
40  *
41  */
42 #define _GLIBCXX_DEBUG_VERIFY(_Condition,_ErrorMessage)                 \
43   do                                                                    \
44   {                                                                     \
45     if (! (_Condition))                                                 \
46       __gnu_debug::_Error_formatter::_M_at(__FILE__, __LINE__)          \
47           ._ErrorMessage._M_error();                                    \
48   } while (false)
49
50 // Verify that [_First, _Last) forms a valid iterator range.
51 #define __glibcxx_check_valid_range(_First,_Last)                       \
52 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__valid_range(_First, _Last),        \
53                       _M_message(__gnu_debug::__msg_valid_range)        \
54                       ._M_iterator(_First, #_First)                     \
55                       ._M_iterator(_Last, #_Last))
56
57 /** Verify that we can insert into *this with the iterator _Position.
58  *  Insertion into a container at a specific position requires that
59  *  the iterator be nonsingular, either dereferenceable or past-the-end,
60  *  and that it reference the sequence we are inserting into. Note that
61  *  this macro is only valid when the container is a_Safe_sequence and
62  *  the iterator is a _Safe_iterator.
63 */
64 #define __glibcxx_check_insert(_Position)                               \
65 _GLIBCXX_DEBUG_VERIFY(!_Position._M_singular(),                         \
66                       _M_message(__gnu_debug::__msg_insert_singular) \
67                       ._M_sequence(*this, "this")                       \
68                       ._M_iterator(_Position, #_Position));             \
69 _GLIBCXX_DEBUG_VERIFY(_Position._M_attached_to(this),                   \
70                       _M_message(__gnu_debug::__msg_insert_different) \
71                       ._M_sequence(*this, "this")                       \
72                       ._M_iterator(_Position, #_Position))
73
74 /** Verify that we can insert into *this after the iterator _Position.
75  *  Insertion into a container after a specific position requires that
76  *  the iterator be nonsingular, either dereferenceable or before-begin,
77  *  and that it reference the sequence we are inserting into. Note that
78  *  this macro is only valid when the container is a_Safe_sequence and
79  *  the iterator is a _Safe_iterator.
80 */
81 #define __glibcxx_check_insert_after(_Position)                         \
82 __glibcxx_check_insert(_Position);                                      \
83 _GLIBCXX_DEBUG_VERIFY(!_Position._M_is_end(),                           \
84                       _M_message(__gnu_debug::__msg_insert_after_end)   \
85                       ._M_sequence(*this, "this")                       \
86                       ._M_iterator(_Position, #_Position))
87
88 /** Verify that we can insert the values in the iterator range
89  *  [_First, _Last) into *this with the iterator _Position.  Insertion
90  *  into a container at a specific position requires that the iterator
91  *  be nonsingular (i.e., either dereferenceable or past-the-end),
92  *  that it reference the sequence we are inserting into, and that the
93  *  iterator range [_First, Last) is a valid (possibly empty)
94  *  range. Note that this macro is only valid when the container is a
95  *  _Safe_sequence and the iterator is a _Safe_iterator.
96  *
97  *  @todo We would like to be able to check for noninterference of
98  *  _Position and the range [_First, _Last), but that can't (in
99  *  general) be done.
100 */
101 #define __glibcxx_check_insert_range(_Position,_First,_Last)            \
102 __glibcxx_check_valid_range(_First,_Last);                              \
103 __glibcxx_check_insert(_Position)
104
105 /** Verify that we can insert the values in the iterator range
106  *  [_First, _Last) into *this after the iterator _Position.  Insertion
107  *  into a container after a specific position requires that the iterator
108  *  be nonsingular (i.e., either dereferenceable or past-the-end),
109  *  that it reference the sequence we are inserting into, and that the
110  *  iterator range [_First, Last) is a valid (possibly empty)
111  *  range. Note that this macro is only valid when the container is a
112  *  _Safe_sequence and the iterator is a _Safe_iterator.
113  *
114  *  @todo We would like to be able to check for noninterference of
115  *  _Position and the range [_First, _Last), but that can't (in
116  *  general) be done.
117 */
118 #define __glibcxx_check_insert_range_after(_Position,_First,_Last)      \
119 __glibcxx_check_valid_range(_First,_Last);                              \
120 __glibcxx_check_insert_after(_Position)
121
122 /** Verify that we can erase the element referenced by the iterator
123  * _Position. We can erase the element if the _Position iterator is
124  * dereferenceable and references this sequence.
125 */
126 #define __glibcxx_check_erase(_Position)                                \
127 _GLIBCXX_DEBUG_VERIFY(_Position._M_dereferenceable(),                   \
128                       _M_message(__gnu_debug::__msg_erase_bad)          \
129                       ._M_sequence(*this, "this")                       \
130                       ._M_iterator(_Position, #_Position));             \
131 _GLIBCXX_DEBUG_VERIFY(_Position._M_attached_to(this),                   \
132                       _M_message(__gnu_debug::__msg_erase_different)    \
133                       ._M_sequence(*this, "this")                       \
134                       ._M_iterator(_Position, #_Position))
135
136 /** Verify that we can erase the element after the iterator
137  * _Position. We can erase the element if the _Position iterator is
138  * before a dereferenceable one and references this sequence.
139 */
140 #define __glibcxx_check_erase_after(_Position)                          \
141 _GLIBCXX_DEBUG_VERIFY(_Position._M_before_dereferenceable(),            \
142                       _M_message(__gnu_debug::__msg_erase_after_bad)    \
143                       ._M_sequence(*this, "this")                       \
144                       ._M_iterator(_Position, #_Position));             \
145 _GLIBCXX_DEBUG_VERIFY(_Position._M_attached_to(this),                   \
146                       _M_message(__gnu_debug::__msg_erase_different)    \
147                       ._M_sequence(*this, "this")                       \
148                       ._M_iterator(_Position, #_Position))
149
150 /** Verify that we can erase the elements in the iterator range
151  *  [_First, _Last). We can erase the elements if [_First, _Last) is a
152  *  valid iterator range within this sequence.
153 */
154 #define __glibcxx_check_erase_range(_First,_Last)                       \
155 __glibcxx_check_valid_range(_First,_Last);                              \
156 _GLIBCXX_DEBUG_VERIFY(_First._M_attached_to(this),                      \
157                       _M_message(__gnu_debug::__msg_erase_different)    \
158                       ._M_sequence(*this, "this")                       \
159                       ._M_iterator(_First, #_First)                     \
160                       ._M_iterator(_Last, #_Last))
161
162 /** Verify that we can erase the elements in the iterator range
163  *  (_First, _Last). We can erase the elements if (_First, _Last) is a
164  *  valid iterator range within this sequence.
165 */
166 #define __glibcxx_check_erase_range_after(_First,_Last)                 \
167 _GLIBCXX_DEBUG_VERIFY(_First._M_can_compare(_Last),                     \
168                       _M_message(__gnu_debug::__msg_erase_different)    \
169                       ._M_sequence(*this, "this")                       \
170                       ._M_iterator(_First, #_First)                     \
171                       ._M_iterator(_Last, #_Last));                     \
172 _GLIBCXX_DEBUG_VERIFY(_First._M_attached_to(this),                      \
173                       _M_message(__gnu_debug::__msg_erase_different)    \
174                       ._M_sequence(*this, "this")                       \
175                       ._M_iterator(_First, #_First));                   \
176 _GLIBCXX_DEBUG_VERIFY(_First != _Last,                                  \
177                       _M_message(__gnu_debug::__msg_valid_range2)       \
178                       ._M_sequence(*this, "this")                       \
179                       ._M_iterator(_First, #_First)                     \
180                       ._M_iterator(_Last, #_Last));                     \
181 _GLIBCXX_DEBUG_VERIFY(_First._M_incrementable(),                        \
182                       _M_message(__gnu_debug::__msg_valid_range2)       \
183                       ._M_sequence(*this, "this")                       \
184                       ._M_iterator(_First, #_First)                     \
185                       ._M_iterator(_Last, #_Last));                     \
186 _GLIBCXX_DEBUG_VERIFY(!_Last._M_is_before_begin(),                      \
187                       _M_message(__gnu_debug::__msg_valid_range2)       \
188                       ._M_sequence(*this, "this")                       \
189                       ._M_iterator(_First, #_First)                     \
190                       ._M_iterator(_Last, #_Last))                      \
191
192 // Verify that the subscript _N is less than the container's size.
193 #define __glibcxx_check_subscript(_N)                                   \
194 _GLIBCXX_DEBUG_VERIFY(_N < this->size(),                                \
195                       _M_message(__gnu_debug::__msg_subscript_oob)      \
196                       ._M_sequence(*this, "this")                       \
197                       ._M_integer(_N, #_N)                              \
198                       ._M_integer(this->size(), "size"))
199
200 // Verify that the container is nonempty
201 #define __glibcxx_check_nonempty()                                      \
202 _GLIBCXX_DEBUG_VERIFY(! this->empty(),                                  \
203                       _M_message(__gnu_debug::__msg_empty)              \
204                       ._M_sequence(*this, "this"))
205
206 // Verify that the iterator range [_First, _Last) is sorted
207 #define __glibcxx_check_sorted(_First,_Last)                            \
208 __glibcxx_check_valid_range(_First,_Last);                              \
209 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_sorted(_First, _Last),       \
210                       _M_message(__gnu_debug::__msg_unsorted)           \
211                       ._M_iterator(_First, #_First)                     \
212                       ._M_iterator(_Last, #_Last))
213
214 /** Verify that the iterator range [_First, _Last) is sorted by the
215     predicate _Pred. */
216 #define __glibcxx_check_sorted_pred(_First,_Last,_Pred)                 \
217 __glibcxx_check_valid_range(_First,_Last);                              \
218 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_sorted(_First, _Last, _Pred), \
219                       _M_message(__gnu_debug::__msg_unsorted_pred)      \
220                       ._M_iterator(_First, #_First)                     \
221                       ._M_iterator(_Last, #_Last)                       \
222                       ._M_string(#_Pred))
223
224 // Special variant for std::merge, std::includes, std::set_*
225 #define __glibcxx_check_sorted_set(_First1,_Last1,_First2)              \
226 __glibcxx_check_valid_range(_First1,_Last1);                            \
227 _GLIBCXX_DEBUG_VERIFY(                                                  \
228   __gnu_debug::__check_sorted_set(_First1, _Last1, _First2),            \
229   _M_message(__gnu_debug::__msg_unsorted)                               \
230   ._M_iterator(_First1, #_First1)                                       \
231   ._M_iterator(_Last1, #_Last1))
232
233 // Likewise with a _Pred.
234 #define __glibcxx_check_sorted_set_pred(_First1,_Last1,_First2,_Pred)   \
235 __glibcxx_check_valid_range(_First1,_Last1);                            \
236 _GLIBCXX_DEBUG_VERIFY(                                                  \
237   __gnu_debug::__check_sorted_set(_First1, _Last1, _First2, _Pred),     \
238   _M_message(__gnu_debug::__msg_unsorted_pred)                          \
239   ._M_iterator(_First1, #_First1)                                       \
240   ._M_iterator(_Last1, #_Last1)                                         \
241   ._M_string(#_Pred))
242
243 /** Verify that the iterator range [_First, _Last) is partitioned
244     w.r.t. the value _Value. */
245 #define __glibcxx_check_partitioned_lower(_First,_Last,_Value)          \
246 __glibcxx_check_valid_range(_First,_Last);                              \
247 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_partitioned_lower(_First, _Last, \
248                                                             _Value),    \
249                       _M_message(__gnu_debug::__msg_unpartitioned)      \
250                       ._M_iterator(_First, #_First)                     \
251                       ._M_iterator(_Last, #_Last)                       \
252                       ._M_string(#_Value))
253
254 #define __glibcxx_check_partitioned_upper(_First,_Last,_Value)          \
255 __glibcxx_check_valid_range(_First,_Last);                              \
256 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_partitioned_upper(_First, _Last, \
257                                                             _Value),    \
258                       _M_message(__gnu_debug::__msg_unpartitioned)      \
259                       ._M_iterator(_First, #_First)                     \
260                       ._M_iterator(_Last, #_Last)                       \
261                       ._M_string(#_Value))
262
263 /** Verify that the iterator range [_First, _Last) is partitioned
264     w.r.t. the value _Value and predicate _Pred. */
265 #define __glibcxx_check_partitioned_lower_pred(_First,_Last,_Value,_Pred) \
266 __glibcxx_check_valid_range(_First,_Last);                              \
267 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_partitioned_lower(_First, _Last, \
268                                                          _Value, _Pred), \
269                       _M_message(__gnu_debug::__msg_unpartitioned_pred) \
270                       ._M_iterator(_First, #_First)                     \
271                       ._M_iterator(_Last, #_Last)                       \
272                       ._M_string(#_Pred)                                \
273                       ._M_string(#_Value))
274
275 /** Verify that the iterator range [_First, _Last) is partitioned
276     w.r.t. the value _Value and predicate _Pred. */
277 #define __glibcxx_check_partitioned_upper_pred(_First,_Last,_Value,_Pred) \
278 __glibcxx_check_valid_range(_First,_Last);                              \
279 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_partitioned_upper(_First, _Last, \
280                                                          _Value, _Pred), \
281                       _M_message(__gnu_debug::__msg_unpartitioned_pred) \
282                       ._M_iterator(_First, #_First)                     \
283                       ._M_iterator(_Last, #_Last)                       \
284                       ._M_string(#_Pred)                                \
285                       ._M_string(#_Value))
286
287 // Verify that the iterator range [_First, _Last) is a heap
288 #define __glibcxx_check_heap(_First,_Last)                              \
289 _GLIBCXX_DEBUG_VERIFY(std::__is_heap(_First, _Last),                    \
290                       _M_message(__gnu_debug::__msg_not_heap)           \
291                       ._M_iterator(_First, #_First)                     \
292                       ._M_iterator(_Last, #_Last))
293
294 /** Verify that the iterator range [_First, _Last) is a heap
295     w.r.t. the predicate _Pred. */
296 #define __glibcxx_check_heap_pred(_First,_Last,_Pred)                   \
297 _GLIBCXX_DEBUG_VERIFY(std::__is_heap(_First, _Last, _Pred),             \
298                       _M_message(__gnu_debug::__msg_not_heap_pred)      \
299                       ._M_iterator(_First, #_First)                     \
300                       ._M_iterator(_Last, #_Last)                       \
301                       ._M_string(#_Pred))
302
303 #ifdef _GLIBCXX_DEBUG_PEDANTIC
304 #  define __glibcxx_check_string(_String) _GLIBCXX_DEBUG_ASSERT(_String != 0)
305 #  define __glibcxx_check_string_len(_String,_Len) \
306        _GLIBCXX_DEBUG_ASSERT(_String != 0 || _Len == 0)
307 #else
308 #  define __glibcxx_check_string(_String)
309 #  define __glibcxx_check_string_len(_String,_Len)
310 #endif
311
312 #endif