gcc/builtin-attrs.def

   1 /* Copyright (C) 2001, 2002, 2004, 2005, 2007, 2010
   2    Free Software Foundation, Inc.
   3    Contributed by Joseph Myers <jsm28@cam.ac.uk>.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 /* This header provides a declarative way of describing the attributes
  22    that are applied to some functions by default.
  23
  24    Before including this header, you must define the following macros.
  25    In each case where there is an ENUM, it is an identifier used to
  26    reference the tree in subsequent definitions.
  27
  28    DEF_ATTR_NULL_TREE (ENUM)
  29
  30      Constructs a NULL_TREE.
  31
  32    DEF_ATTR_INT (ENUM, VALUE)
  33
  34      Constructs an INTEGER_CST with value VALUE (an integer representable
  35      in HOST_WIDE_INT).
  36
  37    DEF_ATTR_IDENT (ENUM, STRING)
  38
  39      Constructs an IDENTIFIER_NODE for STRING.
  40
  41    DEF_ATTR_TREE_LIST (ENUM, PURPOSE, VALUE, CHAIN)
  42
  43      Constructs a TREE_LIST with given PURPOSE, VALUE and CHAIN (given
  44      as previous ENUM names).  */
  45
  46 DEF_ATTR_NULL_TREE (ATTR_NULL)
  47
  48 /* Construct a tree for a given integer and a list containing it.  */
  49 #define DEF_ATTR_FOR_INT(VALUE)                                 \
  50   DEF_ATTR_INT (ATTR_##VALUE, VALUE)                    \
  51   DEF_ATTR_TREE_LIST (ATTR_LIST_##VALUE, ATTR_NULL,     \
  52                       ATTR_##VALUE, ATTR_NULL)
  53 DEF_ATTR_FOR_INT (0)
  54 DEF_ATTR_FOR_INT (1)
  55 DEF_ATTR_FOR_INT (2)
  56 DEF_ATTR_FOR_INT (3)
  57 DEF_ATTR_FOR_INT (4)
  58 DEF_ATTR_FOR_INT (5)
  59 DEF_ATTR_FOR_INT (6)
  60 #undef DEF_ATTR_FOR_INT
  61
  62 /* Construct a tree for a list of two integers.  */
  63 #define DEF_LIST_INT_INT(VALUE1, VALUE2)                                 \
  64   DEF_ATTR_TREE_LIST (ATTR_LIST_##VALUE1##_##VALUE2, ATTR_NULL,          \
  65                       ATTR_##VALUE1, ATTR_LIST_##VALUE2)
  66 DEF_LIST_INT_INT (1,0)
  67 DEF_LIST_INT_INT (1,2)
  68 DEF_LIST_INT_INT (2,0)
  69 DEF_LIST_INT_INT (2,3)
  70 DEF_LIST_INT_INT (3,0)
  71 DEF_LIST_INT_INT (3,4)
  72 DEF_LIST_INT_INT (4,0)
  73 DEF_LIST_INT_INT (4,5)
  74 DEF_LIST_INT_INT (5,0)
  75 DEF_LIST_INT_INT (5,6)
  76 #undef DEF_LIST_INT_INT
  77
  78 /* Construct trees for identifiers.  */
  79 DEF_ATTR_IDENT (ATTR_CONST, "const")
  80 DEF_ATTR_IDENT (ATTR_FORMAT, "format")
  81 DEF_ATTR_IDENT (ATTR_FORMAT_ARG, "format_arg")
  82 DEF_ATTR_IDENT (ATTR_MALLOC, "malloc")
  83 DEF_ATTR_IDENT (ATTR_NONNULL, "nonnull")
  84 DEF_ATTR_IDENT (ATTR_NORETURN, "noreturn")
  85 DEF_ATTR_IDENT (ATTR_NOTHROW, "nothrow")
  86 DEF_ATTR_IDENT (ATTR_LEAF, "leaf")
  87 DEF_ATTR_IDENT (ATTR_PRINTF, "printf")
  88 DEF_ATTR_IDENT (ATTR_ASM_FPRINTF, "asm_fprintf")
  89 DEF_ATTR_IDENT (ATTR_GCC_DIAG, "gcc_diag")
  90 DEF_ATTR_IDENT (ATTR_GCC_CDIAG, "gcc_cdiag")
  91 DEF_ATTR_IDENT (ATTR_GCC_CXXDIAG, "gcc_cxxdiag")
  92 DEF_ATTR_IDENT (ATTR_PURE, "pure")
  93 DEF_ATTR_IDENT (ATTR_NOVOPS, "no vops")
  94 DEF_ATTR_IDENT (ATTR_SCANF, "scanf")
  95 DEF_ATTR_IDENT (ATTR_SENTINEL, "sentinel")
  96 DEF_ATTR_IDENT (ATTR_STRFMON, "strfmon")
  97 DEF_ATTR_IDENT (ATTR_STRFTIME, "strftime")
  98 DEF_ATTR_IDENT (ATTR_TYPEGENERIC, "type generic")
  99 DEF_ATTR_IDENT (ATTR_TM_REGPARM, "*tm regparm")
 100 DEF_ATTR_IDENT (ATTR_TM_TMPURE, "transaction_pure")
 101 DEF_ATTR_IDENT (ATTR_RETURNS_TWICE, "returns_twice")
 102
 103 DEF_ATTR_TREE_LIST (ATTR_NOVOPS_LIST, ATTR_NOVOPS, ATTR_NULL, ATTR_NULL)
 104
 105 DEF_ATTR_TREE_LIST (ATTR_NOVOPS_LEAF_LIST, ATTR_LEAF, ATTR_NULL, ATTR_NOVOPS_LIST)
 106
 107 DEF_ATTR_TREE_LIST (ATTR_LEAF_LIST, ATTR_LEAF, ATTR_NULL, ATTR_NULL)
 108
 109 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_LIST, ATTR_NOTHROW, ATTR_NULL, ATTR_NULL)
 110
 111 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_LEAF_LIST, ATTR_LEAF, ATTR_NULL, ATTR_NOTHROW_LIST)
 112
 113 DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_LIST, ATTR_CONST,        \
 114                         ATTR_NULL, ATTR_NOTHROW_LIST)
 115 DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_LEAF_LIST, ATTR_CONST,   \
 116                         ATTR_NULL, ATTR_NOTHROW_LEAF_LIST)
 117 DEF_ATTR_TREE_LIST (ATTR_PURE_NOTHROW_LIST, ATTR_PURE,          \
 118                         ATTR_NULL, ATTR_NOTHROW_LIST)
 119 DEF_ATTR_TREE_LIST (ATTR_PURE_NOTHROW_LEAF_LIST, ATTR_PURE,     \
 120                         ATTR_NULL, ATTR_NOTHROW_LEAF_LIST)
 121 DEF_ATTR_TREE_LIST (ATTR_PURE_NOTHROW_NOVOPS_LIST, ATTR_NOVOPS, \
 122                         ATTR_NULL, ATTR_PURE_NOTHROW_LIST)
 123 DEF_ATTR_TREE_LIST (ATTR_PURE_NOTHROW_NOVOPS_LEAF_LIST, ATTR_NOVOPS,\
 124                         ATTR_NULL, ATTR_PURE_NOTHROW_LEAF_LIST)
 125 DEF_ATTR_TREE_LIST (ATTR_NORETURN_NOTHROW_LIST, ATTR_NORETURN,  \
 126                         ATTR_NULL, ATTR_NOTHROW_LIST)
 127 DEF_ATTR_TREE_LIST (ATTR_NORETURN_NOTHROW_LEAF_LIST, ATTR_NORETURN,\
 128                         ATTR_NULL, ATTR_NOTHROW_LEAF_LIST)
 129 DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_LIST, ATTR_MALLOC,      \
 130                         ATTR_NULL, ATTR_NOTHROW_LIST)
 131 DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_LEAF_LIST, ATTR_MALLOC, \
 132                         ATTR_NULL, ATTR_NOTHROW_LEAF_LIST)
 133 DEF_ATTR_TREE_LIST (ATTR_SENTINEL_NOTHROW_LIST, ATTR_SENTINEL,  \
 134                         ATTR_NULL, ATTR_NOTHROW_LIST)
 135 DEF_ATTR_TREE_LIST (ATTR_SENTINEL_NOTHROW_LEAF_LIST, ATTR_SENTINEL,     \
 136                         ATTR_NULL, ATTR_NOTHROW_LEAF_LIST)
 137
 138 /* Functions whose pointer parameter(s) are all nonnull.  */
 139 DEF_ATTR_TREE_LIST (ATTR_NONNULL_LIST, ATTR_NONNULL, ATTR_NULL, ATTR_NULL)
 140 /* Functions whose first parameter is a nonnull pointer.  */
 141 DEF_ATTR_TREE_LIST (ATTR_NONNULL_1, ATTR_NONNULL, ATTR_LIST_1, ATTR_NULL)
 142 /* Functions whose second parameter is a nonnull pointer.  */
 143 DEF_ATTR_TREE_LIST (ATTR_NONNULL_2, ATTR_NONNULL, ATTR_LIST_2, ATTR_NULL)
 144 /* Functions whose third parameter is a nonnull pointer.  */
 145 DEF_ATTR_TREE_LIST (ATTR_NONNULL_3, ATTR_NONNULL, ATTR_LIST_3, ATTR_NULL)
 146 /* Nothrow functions with the sentinel(1) attribute. */
 147 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_SENTINEL_1, ATTR_SENTINEL, ATTR_LIST_1, \
 148                         ATTR_NOTHROW_LIST)
 149 /* Nothrow functions whose pointer parameter(s) are all nonnull.  */
 150 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL, ATTR_NONNULL, ATTR_NULL, \
 151                         ATTR_NOTHROW_LIST)
 152 /* Nothrow leaf functions whose pointer parameter(s) are all nonnull.  */
 153 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_LEAF, ATTR_NONNULL, ATTR_NULL, \
 154                         ATTR_NOTHROW_LEAF_LIST)
 155 /* Nothrow functions whose first parameter is a nonnull pointer.  */
 156 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_1, ATTR_NONNULL, ATTR_LIST_1, \
 157                         ATTR_NOTHROW_LIST)
 158 /* Nothrow functions whose second parameter is a nonnull pointer.  */
 159 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_2, ATTR_NONNULL, ATTR_LIST_2, \
 160                         ATTR_NOTHROW_LIST)
 161 /* Nothrow functions whose third parameter is a nonnull pointer.  */
 162 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_3, ATTR_NONNULL, ATTR_LIST_3, \
 163                         ATTR_NOTHROW_LIST)
 164 /* Nothrow functions whose fourth parameter is a nonnull pointer.  */
 165 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_4, ATTR_NONNULL, ATTR_LIST_4, \
 166                         ATTR_NOTHROW_LIST)
 167 /* Nothrow functions whose fifth parameter is a nonnull pointer.  */
 168 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_5, ATTR_NONNULL, ATTR_LIST_5, \
 169                         ATTR_NOTHROW_LIST)
 170 /* Nothrow const functions whose pointer parameter(s) are all nonnull.  */
 171 DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_NONNULL, ATTR_CONST, ATTR_NULL, \
 172                         ATTR_NOTHROW_NONNULL)
 173 /* Nothrow const leaf functions whose pointer parameter(s) are all nonnull.  */
 174 DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_NONNULL_LEAF, ATTR_CONST, ATTR_NULL, \
 175                         ATTR_NOTHROW_NONNULL_LEAF)
 176 /* Nothrow const functions which are type-generic.  */
 177 DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_TYPEGENERIC, ATTR_TYPEGENERIC, ATTR_NULL, \
 178                         ATTR_CONST_NOTHROW_LIST)
 179 /* Nothrow const leaf functions which are type-generic.  */
 180 DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_TYPEGENERIC_LEAF, ATTR_TYPEGENERIC, ATTR_NULL, \
 181                         ATTR_CONST_NOTHROW_LEAF_LIST)
 182 /* Nothrow pure functions whose pointer parameter(s) are all nonnull.  */
 183 DEF_ATTR_TREE_LIST (ATTR_PURE_NOTHROW_NONNULL, ATTR_PURE, ATTR_NULL, \
 184                         ATTR_NOTHROW_NONNULL)
 185 /* Nothrow pure leaf functions whose pointer parameter(s) are all nonnull.  */
 186 DEF_ATTR_TREE_LIST (ATTR_PURE_NOTHROW_NONNULL_LEAF, ATTR_PURE, ATTR_NULL, \
 187                         ATTR_NOTHROW_NONNULL_LEAF)
 188 /* Nothrow malloc functions whose pointer parameter(s) are all nonnull.  */
 189 DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_NONNULL, ATTR_MALLOC, ATTR_NULL, \
 190                         ATTR_NOTHROW_NONNULL)
 191 /* Nothrow malloc leaf functions whose pointer parameter(s) are all nonnull.  */
 192 DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_NONNULL_LEAF, ATTR_MALLOC, ATTR_NULL, \
 193                         ATTR_NOTHROW_NONNULL_LEAF)
 194
 195 /* Construct a tree for a format attribute.  */
 196 #define DEF_FORMAT_ATTRIBUTE(TYPE, FA, VALUES)                           \
 197   DEF_ATTR_TREE_LIST (ATTR_##TYPE##_##VALUES, ATTR_NULL,                 \
 198                       ATTR_##TYPE, ATTR_LIST_##VALUES)                   \
 199   DEF_ATTR_TREE_LIST (ATTR_FORMAT_##TYPE##_##VALUES, ATTR_FORMAT,        \
 200                       ATTR_##TYPE##_##VALUES, ATTR_NONNULL_##FA)
 201 #define DEF_FORMAT_ATTRIBUTE_NOTHROW(TYPE, FA, VALUES)                   \
 202   DEF_ATTR_TREE_LIST (ATTR_##TYPE##_##VALUES, ATTR_NULL,                 \
 203                       ATTR_##TYPE, ATTR_LIST_##VALUES)                   \
 204   DEF_ATTR_TREE_LIST (ATTR_FORMAT_##TYPE##_NOTHROW_##VALUES, ATTR_FORMAT,\
 205                       ATTR_##TYPE##_##VALUES, ATTR_NOTHROW_NONNULL_##FA)
 206 #define DEF_FORMAT_ATTRIBUTE_BOTH(TYPE, FA, VALUES)                      \
 207   DEF_ATTR_TREE_LIST (ATTR_##TYPE##_##VALUES, ATTR_NULL,                 \
 208                       ATTR_##TYPE, ATTR_LIST_##VALUES)                   \
 209   DEF_ATTR_TREE_LIST (ATTR_FORMAT_##TYPE##_##VALUES, ATTR_FORMAT,        \
 210                       ATTR_##TYPE##_##VALUES, ATTR_NONNULL_##FA)         \
 211   DEF_ATTR_TREE_LIST (ATTR_FORMAT_##TYPE##_NOTHROW_##VALUES, ATTR_FORMAT,\
 212                       ATTR_##TYPE##_##VALUES, ATTR_NOTHROW_NONNULL_##FA)
 213 DEF_FORMAT_ATTRIBUTE(PRINTF,1,1_0)
 214 DEF_FORMAT_ATTRIBUTE(PRINTF,1,1_2)
 215 DEF_FORMAT_ATTRIBUTE_BOTH(PRINTF,2,2_0)
 216 DEF_FORMAT_ATTRIBUTE_BOTH(PRINTF,2,2_3)
 217 DEF_FORMAT_ATTRIBUTE_BOTH(PRINTF,3,3_0)
 218 DEF_FORMAT_ATTRIBUTE_BOTH(PRINTF,3,3_4)
 219 DEF_FORMAT_ATTRIBUTE_NOTHROW(PRINTF,4,4_0)
 220 DEF_FORMAT_ATTRIBUTE_NOTHROW(PRINTF,4,4_5)
 221 DEF_FORMAT_ATTRIBUTE_NOTHROW(PRINTF,5,5_0)
 222 DEF_FORMAT_ATTRIBUTE_NOTHROW(PRINTF,5,5_6)
 223 DEF_FORMAT_ATTRIBUTE(SCANF,1,1_0)
 224 DEF_FORMAT_ATTRIBUTE(SCANF,1,1_2)
 225 DEF_FORMAT_ATTRIBUTE_BOTH(SCANF,2,2_0)
 226 DEF_FORMAT_ATTRIBUTE_BOTH(SCANF,2,2_3)
 227 DEF_FORMAT_ATTRIBUTE_NOTHROW(STRFTIME,3,3_0)
 228 DEF_FORMAT_ATTRIBUTE_NOTHROW(STRFMON,3,3_4)
 229 #undef DEF_FORMAT_ATTRIBUTE
 230 #undef DEF_FORMAT_ATTRIBUTE_NOTHROW
 231 #undef DEF_FORMAT_ATTRIBUTE_BOTH
 232
 233 /* Transactional memory variants of the above.  */
 234
 235 DEF_ATTR_TREE_LIST (ATTR_TM_NOTHROW_LIST,
 236                     ATTR_TM_REGPARM, ATTR_NULL, ATTR_NOTHROW_LIST)
 237 DEF_ATTR_TREE_LIST (ATTR_TM_TMPURE_NOTHROW_LIST,
 238                     ATTR_TM_TMPURE, ATTR_NULL, ATTR_TM_NOTHROW_LIST)
 239 DEF_ATTR_TREE_LIST (ATTR_TM_PURE_TMPURE_NOTHROW_LIST,
 240                     ATTR_PURE, ATTR_NULL, ATTR_TM_TMPURE_NOTHROW_LIST)
 241 DEF_ATTR_TREE_LIST (ATTR_TM_NORETURN_NOTHROW_LIST,
 242                     ATTR_TM_REGPARM, ATTR_NULL, ATTR_NORETURN_NOTHROW_LIST)
 243 DEF_ATTR_TREE_LIST (ATTR_TM_CONST_NOTHROW_LIST,
 244                     ATTR_TM_REGPARM, ATTR_NULL, ATTR_CONST_NOTHROW_LIST)
 245 DEF_ATTR_TREE_LIST (ATTR_TM_NOTHROW_RT_LIST,
 246                     ATTR_RETURNS_TWICE, ATTR_NULL, ATTR_TM_NOTHROW_LIST)
 247
 248 /* Same attributes used for BUILT_IN_MALLOC except with TM_PURE thrown in.  */
 249 DEF_ATTR_TREE_LIST (ATTR_TMPURE_MALLOC_NOTHROW_LIST,
 250                    ATTR_TM_TMPURE, ATTR_NULL, ATTR_MALLOC_NOTHROW_LIST)
 251 /* Same attributes used for BUILT_IN_FREE except with TM_PURE thrown in.  */
 252 DEF_ATTR_TREE_LIST (ATTR_TMPURE_NOTHROW_LIST,
 253                    ATTR_TM_TMPURE, ATTR_NULL, ATTR_NOTHROW_LIST)
 254
 255 /* Construct a tree for a format_arg attribute.  */
 256 #define DEF_FORMAT_ARG_ATTRIBUTE(FA)                                    \
 257   DEF_ATTR_TREE_LIST (ATTR_FORMAT_ARG_##FA, ATTR_FORMAT_ARG,            \
 258                       ATTR_LIST_##FA, ATTR_NOTHROW_NONNULL_##FA)
 259 DEF_FORMAT_ARG_ATTRIBUTE(1)
 260 DEF_FORMAT_ARG_ATTRIBUTE(2)
 261 #undef DEF_FORMAT_ARG_ATTRIBUTE
 262