libstdc++-v3/include/debug/macros.h

   1 // Debugging support implementation -*- C++ -*-
   2
   3 // Copyright (C) 2003, 2005, 2006
   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 2, 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 // 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,
  20 // USA.
  21
  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.
  30
  31 /** @file debug/macros.h
  32  *  This file is a GNU debug extension to the Standard C++ Library.
  33  */
  34
  35 #ifndef _GLIBCXX_DEBUG_MACROS_H
  36 #define _GLIBCXX_DEBUG_MACROS_H 1
  37
  38 /**
  39  * Macros used by the implementation to verify certain
  40  * properties. These macros may only be used directly by the debug
  41  * wrappers. Note that these are macros (instead of the more obviously
  42  * "correct" choice of making them functions) because we need line and
  43  * file information at the call site, to minimize the distance between
  44  * the user error and where the error is reported.
  45  *
  46  */
  47 #define _GLIBCXX_DEBUG_VERIFY(_Condition,_ErrorMessage)                 \
  48   do                                                                    \
  49   {                                                                     \
  50     if (! (_Condition))                                                 \
  51       __gnu_debug::_Error_formatter::_M_at(__FILE__, __LINE__)          \
  52           ._ErrorMessage._M_error();                                    \
  53   } while (false)
  54
  55 // Verify that [_First, _Last) forms a valid iterator range.
  56 #define __glibcxx_check_valid_range(_First,_Last)                       \
  57 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__valid_range(_First, _Last),        \
  58                       _M_message(__gnu_debug::__msg_valid_range)        \
  59                       ._M_iterator(_First, #_First)                     \
  60                       ._M_iterator(_Last, #_Last))
  61
  62 /** Verify that we can insert into *this with the iterator _Position.
  63  *  Insertion into a container at a specific position requires that
  64  *  the iterator be nonsingular (i.e., either dereferenceable or
  65  *  past-the-end) and that it reference the sequence we are inserting
  66  *  into. Note that this macro is only valid when the container is a
  67  *  _Safe_sequence and the iterator is a _Safe_iterator.
  68 */
  69 #define __glibcxx_check_insert(_Position)                               \
  70 _GLIBCXX_DEBUG_VERIFY(!_Position._M_singular(),                         \
  71                       _M_message(__gnu_debug::__msg_insert_singular) \
  72                       ._M_sequence(*this, "this")                       \
  73                       ._M_iterator(_Position, #_Position));             \
  74 _GLIBCXX_DEBUG_VERIFY(_Position._M_attached_to(this),                   \
  75                       _M_message(__gnu_debug::__msg_insert_different) \
  76                       ._M_sequence(*this, "this")                       \
  77                       ._M_iterator(_Position, #_Position))
  78
  79 /** Verify that we can insert the values in the iterator range
  80  *  [_First, _Last) into *this with the iterator _Position.  Insertion
  81  *  into a container at a specific position requires that the iterator
  82  *  be nonsingular (i.e., either dereferenceable or past-the-end),
  83  *  that it reference the sequence we are inserting into, and that the
  84  *  iterator range [_First, Last) is a valid (possibly empty)
  85  *  range. Note that this macro is only valid when the container is a
  86  *  _Safe_sequence and the iterator is a _Safe_iterator.
  87  *
  88  *  @tbd We would like to be able to check for noninterference of
  89  *  _Position and the range [_First, _Last), but that can't (in
  90  *  general) be done.
  91 */
  92 #define __glibcxx_check_insert_range(_Position,_First,_Last)            \
  93 __glibcxx_check_valid_range(_First,_Last);                              \
  94 _GLIBCXX_DEBUG_VERIFY(!_Position._M_singular(),                         \
  95                       _M_message(__gnu_debug::__msg_insert_singular)    \
  96                       ._M_sequence(*this, "this")                       \
  97                       ._M_iterator(_Position, #_Position));             \
  98 _GLIBCXX_DEBUG_VERIFY(_Position._M_attached_to(this),                   \
  99                       _M_message(__gnu_debug::__msg_insert_different)   \
 100                       ._M_sequence(*this, "this")                       \
 101                       ._M_iterator(_Position, #_Position))
 102
 103 /** Verify that we can erase the element referenced by the iterator
 104  * _Position. We can erase the element if the _Position iterator is
 105  * dereferenceable and references this sequence.
 106 */
 107 #define __glibcxx_check_erase(_Position)                                \
 108 _GLIBCXX_DEBUG_VERIFY(_Position._M_dereferenceable(),                   \
 109                       _M_message(__gnu_debug::__msg_erase_bad)          \
 110                       ._M_sequence(*this, "this")                       \
 111                       ._M_iterator(_Position, #_Position));             \
 112 _GLIBCXX_DEBUG_VERIFY(_Position._M_attached_to(this),                   \
 113                       _M_message(__gnu_debug::__msg_erase_different)    \
 114                       ._M_sequence(*this, "this")                       \
 115                       ._M_iterator(_Position, #_Position))
 116
 117 /** Verify that we can erase the elements in the iterator range
 118  *  [_First, _Last). We can erase the elements if [_First, _Last) is a
 119  *  valid iterator range within this sequence.
 120 */
 121 #define __glibcxx_check_erase_range(_First,_Last)                       \
 122 __glibcxx_check_valid_range(_First,_Last);                              \
 123 _GLIBCXX_DEBUG_VERIFY(_First._M_attached_to(this),                      \
 124                       _M_message(__gnu_debug::__msg_erase_different)    \
 125                       ._M_sequence(*this, "this")                       \
 126                       ._M_iterator(_First, #_First)                     \
 127                       ._M_iterator(_Last, #_Last))
 128
 129 // Verify that the subscript _N is less than the container's size.
 130 #define __glibcxx_check_subscript(_N)                                   \
 131 _GLIBCXX_DEBUG_VERIFY(_N < this->size(),                                \
 132                       _M_message(__gnu_debug::__msg_subscript_oob)      \
 133                       ._M_sequence(*this, "this")                       \
 134                       ._M_integer(_N, #_N)                              \
 135                       ._M_integer(this->size(), "size"))
 136
 137 // Verify that the container is nonempty
 138 #define __glibcxx_check_nonempty()                                      \
 139 _GLIBCXX_DEBUG_VERIFY(! this->empty(),                                  \
 140                       _M_message(__gnu_debug::__msg_empty)              \
 141                       ._M_sequence(*this, "this"))
 142
 143 // Verify that the < operator for elements in the sequence is a
 144 // StrictWeakOrdering by checking that it is irreflexive.
 145 #define __glibcxx_check_strict_weak_ordering(_First,_Last)      \
 146 _GLIBCXX_DEBUG_ASSERT(_First == _Last || !(*_First < *_First))
 147
 148 // Verify that the predicate is StrictWeakOrdering by checking that it
 149 // is irreflexive.
 150 #define __glibcxx_check_strict_weak_ordering_pred(_First,_Last,_Pred)   \
 151 _GLIBCXX_DEBUG_ASSERT(_First == _Last || !_Pred(*_First, *_First))
 152
 153
 154 // Verify that the iterator range [_First, _Last) is sorted
 155 #define __glibcxx_check_sorted(_First,_Last)                            \
 156 __glibcxx_check_valid_range(_First,_Last);                              \
 157 __glibcxx_check_strict_weak_ordering(_First,_Last);                     \
 158 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_sorted(_First, _Last),       \
 159                       _M_message(__gnu_debug::__msg_unsorted)           \
 160                       ._M_iterator(_First, #_First)                     \
 161                       ._M_iterator(_Last, #_Last))
 162
 163 /** Verify that the iterator range [_First, _Last) is sorted by the
 164     predicate _Pred. */
 165 #define __glibcxx_check_sorted_pred(_First,_Last,_Pred)                 \
 166 __glibcxx_check_valid_range(_First,_Last);                              \
 167 __glibcxx_check_strict_weak_ordering_pred(_First,_Last,_Pred);          \
 168 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_sorted(_First, _Last, _Pred), \
 169                       _M_message(__gnu_debug::__msg_unsorted_pred)      \
 170                       ._M_iterator(_First, #_First)                     \
 171                       ._M_iterator(_Last, #_Last)                       \
 172                       ._M_string(#_Pred))
 173
 174 /** Verify that the iterator range [_First, _Last) is partitioned
 175     w.r.t. the value _Value. */
 176 #define __glibcxx_check_partitioned(_First,_Last,_Value)                \
 177 __glibcxx_check_valid_range(_First,_Last);                              \
 178 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_partitioned(_First, _Last,   \
 179                                                             _Value),    \
 180                       _M_message(__gnu_debug::__msg_unpartitioned)      \
 181                       ._M_iterator(_First, #_First)                     \
 182                       ._M_iterator(_Last, #_Last)                       \
 183                       ._M_string(#_Value))
 184
 185 /** Verify that the iterator range [_First, _Last) is partitioned
 186     w.r.t. the value _Value and predicate _Pred. */
 187 #define __glibcxx_check_partitioned_pred(_First,_Last,_Value,_Pred)     \
 188 __glibcxx_check_valid_range(_First,_Last);                              \
 189 _GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_partitioned(_First, _Last,   \
 190                                                          _Value, _Pred), \
 191                       _M_message(__gnu_debug::__msg_unpartitioned_pred) \
 192                       ._M_iterator(_First, #_First)                     \
 193                       ._M_iterator(_Last, #_Last)                       \
 194                       ._M_string(#_Pred)                                \
 195                       ._M_string(#_Value))
 196
 197 // Verify that the iterator range [_First, _Last) is a heap
 198 #define __glibcxx_check_heap(_First,_Last)                              \
 199 __glibcxx_check_valid_range(_First,_Last);                              \
 200 _GLIBCXX_DEBUG_VERIFY(std::__is_heap(_First, _Last),                    \
 201                       _M_message(__gnu_debug::__msg_not_heap)           \
 202                       ._M_iterator(_First, #_First)                     \
 203                       ._M_iterator(_Last, #_Last))
 204
 205 /** Verify that the iterator range [_First, _Last) is a heap
 206     w.r.t. the predicate _Pred. */
 207 #define __glibcxx_check_heap_pred(_First,_Last,_Pred)                   \
 208 __glibcxx_check_valid_range(_First,_Last);                              \
 209 _GLIBCXX_DEBUG_VERIFY(std::__is_heap(_First, _Last, _Pred),             \
 210                       _M_message(__gnu_debug::__msg_not_heap_pred)      \
 211                       ._M_iterator(_First, #_First)                     \
 212                       ._M_iterator(_Last, #_Last)                       \
 213                       ._M_string(#_Pred))
 214
 215 #ifdef _GLIBCXX_DEBUG_PEDANTIC
 216 #  define __glibcxx_check_string(_String) _GLIBCXX_DEBUG_ASSERT(_String != 0)
 217 #  define __glibcxx_check_string_len(_String,_Len) \
 218        _GLIBCXX_DEBUG_ASSERT(_String != 0 || _Len == 0)
 219 #else
 220 #  define __glibcxx_check_string(_String)
 221 #  define __glibcxx_check_string_len(_String,_Len)
 222 #endif
 223
 224 #endif