libstdc++
macros.h
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1 // Debugging support implementation -*- C++ -*-
2 
3 // Copyright (C) 2003-2015 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 /** @file debug/macros.h
26  * This file is a GNU debug extension to the Standard C++ Library.
27  */
28 
29 #ifndef _GLIBCXX_DEBUG_MACROS_H
30 #define _GLIBCXX_DEBUG_MACROS_H 1
31 
32 /**
33  * Macros used by the implementation to verify certain
34  * properties. These macros may only be used directly by the debug
35  * wrappers. Note that these are macros (instead of the more obviously
36  * @a correct choice of making them functions) because we need line and
37  * file information at the call site, to minimize the distance between
38  * the user error and where the error is reported.
39  *
40  */
41 #define _GLIBCXX_DEBUG_VERIFY_AT(_Condition,_ErrorMessage,_File,_Line) \
42  do \
43  { \
44  if (! (_Condition)) \
45  __gnu_debug::_Error_formatter::_M_at(_File, _Line) \
46  ._ErrorMessage._M_error(); \
47  } while (false)
48 
49 #define _GLIBCXX_DEBUG_VERIFY(_Condition,_ErrorMessage) \
50  _GLIBCXX_DEBUG_VERIFY_AT(_Condition,_ErrorMessage,__FILE__,__LINE__)
51 
52 // Verify that [_First, _Last) forms a valid iterator range.
53 #define __glibcxx_check_valid_range(_First,_Last) \
54 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__valid_range(_First, _Last), \
55  _M_message(__gnu_debug::__msg_valid_range) \
56  ._M_iterator(_First, #_First) \
57  ._M_iterator(_Last, #_Last))
58 
59 // Verify that [_First, _Last) forms a non-empty iterator range.
60 #define __glibcxx_check_non_empty_range(_First,_Last) \
61 _GLIBCXX_DEBUG_VERIFY(_First != _Last, \
62  _M_message(__gnu_debug::__msg_non_empty_range) \
63  ._M_iterator(_First, #_First) \
64  ._M_iterator(_Last, #_Last))
65 
66 /** Verify that we can insert into *this with the iterator _Position.
67  * Insertion into a container at a specific position requires that
68  * the iterator be nonsingular, either dereferenceable or past-the-end,
69  * and that it reference the sequence we are inserting into. Note that
70  * this macro is only valid when the container is a_Safe_sequence and
71  * the iterator is a _Safe_iterator.
72 */
73 #define __glibcxx_check_insert(_Position) \
74 _GLIBCXX_DEBUG_VERIFY(!_Position._M_singular(), \
75  _M_message(__gnu_debug::__msg_insert_singular) \
76  ._M_sequence(*this, "this") \
77  ._M_iterator(_Position, #_Position)); \
78 _GLIBCXX_DEBUG_VERIFY(_Position._M_attached_to(this), \
79  _M_message(__gnu_debug::__msg_insert_different) \
80  ._M_sequence(*this, "this") \
81  ._M_iterator(_Position, #_Position))
82 
83 /** Verify that we can insert into *this after the iterator _Position.
84  * Insertion into a container after a specific position requires that
85  * the iterator be nonsingular, either dereferenceable or before-begin,
86  * and that it reference the sequence we are inserting into. Note that
87  * this macro is only valid when the container is a_Safe_sequence and
88  * the iterator is a _Safe_iterator.
89 */
90 #define __glibcxx_check_insert_after(_Position) \
91 __glibcxx_check_insert(_Position); \
92 _GLIBCXX_DEBUG_VERIFY(!_Position._M_is_end(), \
93  _M_message(__gnu_debug::__msg_insert_after_end) \
94  ._M_sequence(*this, "this") \
95  ._M_iterator(_Position, #_Position))
96 
97 /** Verify that we can insert the values in the iterator range
98  * [_First, _Last) into *this with the iterator _Position. Insertion
99  * into a container at a specific position requires that the iterator
100  * be nonsingular (i.e., either dereferenceable or past-the-end),
101  * that it reference the sequence we are inserting into, and that the
102  * iterator range [_First, _Last) is a valid (possibly empty)
103  * range which does not reference the sequence we are inserting into.
104  * Note that this macro is only valid when the container is a
105  * _Safe_sequence and the _Position iterator is a _Safe_iterator.
106 */
107 #define __glibcxx_check_insert_range(_Position,_First,_Last) \
108 __glibcxx_check_valid_range(_First,_Last); \
109 __glibcxx_check_insert(_Position); \
110 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__foreign_iterator(_Position,_First,_Last),\
111  _M_message(__gnu_debug::__msg_insert_range_from_self)\
112  ._M_iterator(_First, #_First) \
113  ._M_iterator(_Last, #_Last) \
114  ._M_sequence(*this, "this"))
115 
116 /** Verify that we can insert the values in the iterator range
117  * [_First, _Last) into *this after the iterator _Position. Insertion
118  * into a container after a specific position requires that the iterator
119  * be nonsingular (i.e., either dereferenceable or past-the-end),
120  * that it reference the sequence we are inserting into, and that the
121  * iterator range [_First, _Last) is a valid (possibly empty)
122  * range which does not reference the sequence we are inserting into.
123  * Note that this macro is only valid when the container is a
124  * _Safe_sequence and the _Position iterator is a _Safe_iterator.
125 */
126 #define __glibcxx_check_insert_range_after(_Position,_First,_Last) \
127 __glibcxx_check_valid_range(_First,_Last); \
128 __glibcxx_check_insert_after(_Position); \
129 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__foreign_iterator(_Position,_First,_Last),\
130  _M_message(__gnu_debug::__msg_insert_range_from_self)\
131  ._M_iterator(_First, #_First) \
132  ._M_iterator(_Last, #_Last) \
133  ._M_sequence(*this, "this"))
134 
135 /** Verify that we can erase the element referenced by the iterator
136  * _Position. We can erase the element if the _Position iterator is
137  * dereferenceable and references this sequence.
138 */
139 #define __glibcxx_check_erase(_Position) \
140 _GLIBCXX_DEBUG_VERIFY(_Position._M_dereferenceable(), \
141  _M_message(__gnu_debug::__msg_erase_bad) \
142  ._M_sequence(*this, "this") \
143  ._M_iterator(_Position, #_Position)); \
144 _GLIBCXX_DEBUG_VERIFY(_Position._M_attached_to(this), \
145  _M_message(__gnu_debug::__msg_erase_different) \
146  ._M_sequence(*this, "this") \
147  ._M_iterator(_Position, #_Position))
148 
149 /** Verify that we can erase the element after the iterator
150  * _Position. We can erase the element if the _Position iterator is
151  * before a dereferenceable one and references this sequence.
152 */
153 #define __glibcxx_check_erase_after(_Position) \
154 _GLIBCXX_DEBUG_VERIFY(_Position._M_before_dereferenceable(), \
155  _M_message(__gnu_debug::__msg_erase_after_bad) \
156  ._M_sequence(*this, "this") \
157  ._M_iterator(_Position, #_Position)); \
158 _GLIBCXX_DEBUG_VERIFY(_Position._M_attached_to(this), \
159  _M_message(__gnu_debug::__msg_erase_different) \
160  ._M_sequence(*this, "this") \
161  ._M_iterator(_Position, #_Position))
162 
163 /** Verify that we can erase the elements in the iterator range
164  * [_First, _Last). We can erase the elements if [_First, _Last) is a
165  * valid iterator range within this sequence.
166 */
167 #define __glibcxx_check_erase_range(_First,_Last) \
168 __glibcxx_check_valid_range(_First,_Last); \
169 _GLIBCXX_DEBUG_VERIFY(_First._M_attached_to(this), \
170  _M_message(__gnu_debug::__msg_erase_different) \
171  ._M_sequence(*this, "this") \
172  ._M_iterator(_First, #_First) \
173  ._M_iterator(_Last, #_Last))
174 
175 /** Verify that we can erase the elements in the iterator range
176  * (_First, _Last). We can erase the elements if (_First, _Last) is a
177  * valid iterator range within this sequence.
178 */
179 #define __glibcxx_check_erase_range_after(_First,_Last) \
180 _GLIBCXX_DEBUG_VERIFY(_First._M_can_compare(_Last), \
181  _M_message(__gnu_debug::__msg_erase_different) \
182  ._M_sequence(*this, "this") \
183  ._M_iterator(_First, #_First) \
184  ._M_iterator(_Last, #_Last)); \
185 _GLIBCXX_DEBUG_VERIFY(_First._M_attached_to(this), \
186  _M_message(__gnu_debug::__msg_erase_different) \
187  ._M_sequence(*this, "this") \
188  ._M_iterator(_First, #_First)); \
189 _GLIBCXX_DEBUG_VERIFY(_First != _Last, \
190  _M_message(__gnu_debug::__msg_valid_range2) \
191  ._M_sequence(*this, "this") \
192  ._M_iterator(_First, #_First) \
193  ._M_iterator(_Last, #_Last)); \
194 _GLIBCXX_DEBUG_VERIFY(_First._M_incrementable(), \
195  _M_message(__gnu_debug::__msg_valid_range2) \
196  ._M_sequence(*this, "this") \
197  ._M_iterator(_First, #_First) \
198  ._M_iterator(_Last, #_Last)); \
199 _GLIBCXX_DEBUG_VERIFY(!_Last._M_is_before_begin(), \
200  _M_message(__gnu_debug::__msg_valid_range2) \
201  ._M_sequence(*this, "this") \
202  ._M_iterator(_First, #_First) \
203  ._M_iterator(_Last, #_Last)) \
204 
205 // Verify that the subscript _N is less than the container's size.
206 #define __glibcxx_check_subscript(_N) \
207 _GLIBCXX_DEBUG_VERIFY(_N < this->size(), \
208  _M_message(__gnu_debug::__msg_subscript_oob) \
209  ._M_sequence(*this, "this") \
210  ._M_integer(_N, #_N) \
211  ._M_integer(this->size(), "size"))
212 
213 // Verify that the bucket _N is less than the container's buckets count.
214 #define __glibcxx_check_bucket_index(_N) \
215 _GLIBCXX_DEBUG_VERIFY(_N < this->bucket_count(), \
216  _M_message(__gnu_debug::__msg_bucket_index_oob) \
217  ._M_sequence(*this, "this") \
218  ._M_integer(_N, #_N) \
219  ._M_integer(this->bucket_count(), "size"))
220 
221 // Verify that the container is nonempty
222 #define __glibcxx_check_nonempty() \
223 _GLIBCXX_DEBUG_VERIFY(! this->empty(), \
224  _M_message(__gnu_debug::__msg_empty) \
225  ._M_sequence(*this, "this"))
226 
227 // Verify that the iterator range [_First, _Last) is sorted
228 #define __glibcxx_check_sorted(_First,_Last) \
229 __glibcxx_check_valid_range(_First,_Last); \
230  _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_sorted( \
231  __gnu_debug::__base(_First), \
232  __gnu_debug::__base(_Last)), \
233  _M_message(__gnu_debug::__msg_unsorted) \
234  ._M_iterator(_First, #_First) \
235  ._M_iterator(_Last, #_Last))
236 
237 /** Verify that the iterator range [_First, _Last) is sorted by the
238  predicate _Pred. */
239 #define __glibcxx_check_sorted_pred(_First,_Last,_Pred) \
240 __glibcxx_check_valid_range(_First,_Last); \
241 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_sorted( \
242  __gnu_debug::__base(_First), \
243  __gnu_debug::__base(_Last), _Pred), \
244  _M_message(__gnu_debug::__msg_unsorted_pred) \
245  ._M_iterator(_First, #_First) \
246  ._M_iterator(_Last, #_Last) \
247  ._M_string(#_Pred))
248 
249 // Special variant for std::merge, std::includes, std::set_*
250 #define __glibcxx_check_sorted_set(_First1,_Last1,_First2) \
251 __glibcxx_check_valid_range(_First1,_Last1); \
252 _GLIBCXX_DEBUG_VERIFY( \
253  __gnu_debug::__check_sorted_set(__gnu_debug::__base(_First1), \
254  __gnu_debug::__base(_Last1), _First2),\
255  _M_message(__gnu_debug::__msg_unsorted) \
256  ._M_iterator(_First1, #_First1) \
257  ._M_iterator(_Last1, #_Last1))
258 
259 // Likewise with a _Pred.
260 #define __glibcxx_check_sorted_set_pred(_First1,_Last1,_First2,_Pred) \
261 __glibcxx_check_valid_range(_First1,_Last1); \
262 _GLIBCXX_DEBUG_VERIFY( \
263  __gnu_debug::__check_sorted_set(__gnu_debug::__base(_First1), \
264  __gnu_debug::__base(_Last1), \
265  _First2, _Pred), \
266  _M_message(__gnu_debug::__msg_unsorted_pred) \
267  ._M_iterator(_First1, #_First1) \
268  ._M_iterator(_Last1, #_Last1) \
269  ._M_string(#_Pred))
270 
271 /** Verify that the iterator range [_First, _Last) is partitioned
272  w.r.t. the value _Value. */
273 #define __glibcxx_check_partitioned_lower(_First,_Last,_Value) \
274 __glibcxx_check_valid_range(_First,_Last); \
275 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_partitioned_lower( \
276  __gnu_debug::__base(_First), \
277  __gnu_debug::__base(_Last), _Value), \
278  _M_message(__gnu_debug::__msg_unpartitioned) \
279  ._M_iterator(_First, #_First) \
280  ._M_iterator(_Last, #_Last) \
281  ._M_string(#_Value))
282 
283 #define __glibcxx_check_partitioned_upper(_First,_Last,_Value) \
284 __glibcxx_check_valid_range(_First,_Last); \
285 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_partitioned_upper( \
286  __gnu_debug::__base(_First), \
287  __gnu_debug::__base(_Last), _Value), \
288  _M_message(__gnu_debug::__msg_unpartitioned) \
289  ._M_iterator(_First, #_First) \
290  ._M_iterator(_Last, #_Last) \
291  ._M_string(#_Value))
292 
293 /** Verify that the iterator range [_First, _Last) is partitioned
294  w.r.t. the value _Value and predicate _Pred. */
295 #define __glibcxx_check_partitioned_lower_pred(_First,_Last,_Value,_Pred) \
296 __glibcxx_check_valid_range(_First,_Last); \
297 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_partitioned_lower( \
298  __gnu_debug::__base(_First), \
299  __gnu_debug::__base(_Last), _Value, _Pred), \
300  _M_message(__gnu_debug::__msg_unpartitioned_pred) \
301  ._M_iterator(_First, #_First) \
302  ._M_iterator(_Last, #_Last) \
303  ._M_string(#_Pred) \
304  ._M_string(#_Value))
305 
306 /** Verify that the iterator range [_First, _Last) is partitioned
307  w.r.t. the value _Value and predicate _Pred. */
308 #define __glibcxx_check_partitioned_upper_pred(_First,_Last,_Value,_Pred) \
309 __glibcxx_check_valid_range(_First,_Last); \
310 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_partitioned_upper( \
311  __gnu_debug::__base(_First), \
312  __gnu_debug::__base(_Last), _Value, _Pred), \
313  _M_message(__gnu_debug::__msg_unpartitioned_pred) \
314  ._M_iterator(_First, #_First) \
315  ._M_iterator(_Last, #_Last) \
316  ._M_string(#_Pred) \
317  ._M_string(#_Value))
318 
319 // Verify that the iterator range [_First, _Last) is a heap
320 #define __glibcxx_check_heap(_First,_Last) \
321  _GLIBCXX_DEBUG_VERIFY(std::__is_heap(__gnu_debug::__base(_First), \
322  __gnu_debug::__base(_Last)), \
323  _M_message(__gnu_debug::__msg_not_heap) \
324  ._M_iterator(_First, #_First) \
325  ._M_iterator(_Last, #_Last))
326 
327 /** Verify that the iterator range [_First, _Last) is a heap
328  w.r.t. the predicate _Pred. */
329 #define __glibcxx_check_heap_pred(_First,_Last,_Pred) \
330  _GLIBCXX_DEBUG_VERIFY(std::__is_heap(__gnu_debug::__base(_First), \
331  __gnu_debug::__base(_Last), \
332  _Pred), \
333  _M_message(__gnu_debug::__msg_not_heap_pred) \
334  ._M_iterator(_First, #_First) \
335  ._M_iterator(_Last, #_Last) \
336  ._M_string(#_Pred))
337 
338 // Verify that the container is not self move assigned
339 #define __glibcxx_check_self_move_assign(_Other) \
340 _GLIBCXX_DEBUG_VERIFY(this != &_Other, \
341  _M_message(__gnu_debug::__msg_self_move_assign) \
342  ._M_sequence(*this, "this"))
343 
344 // Verify that load factor is positive
345 #define __glibcxx_check_max_load_factor(_F) \
346 _GLIBCXX_DEBUG_VERIFY(_F > 0.0f, \
347  _M_message(__gnu_debug::__msg_valid_load_factor) \
348  ._M_sequence(*this, "this"))
349 
350 #define __glibcxx_check_equal_allocs(_This, _Other) \
351 _GLIBCXX_DEBUG_VERIFY(_This.get_allocator() == _Other.get_allocator(), \
352  _M_message(__gnu_debug::__msg_equal_allocs) \
353  ._M_sequence(_This, "this"))
354 
355 #ifdef _GLIBCXX_DEBUG_PEDANTIC
356 # define __glibcxx_check_string(_String) _GLIBCXX_DEBUG_ASSERT(_String != 0)
357 # define __glibcxx_check_string_len(_String,_Len) \
358  _GLIBCXX_DEBUG_ASSERT(_String != 0 || _Len == 0)
359 #else
360 # define __glibcxx_check_string(_String)
361 # define __glibcxx_check_string_len(_String,_Len)
362 #endif
363 
364 #endif