gcc/builtin-attrs.def

   1 /* Copyright (C) 2001-2014 Free Software Foundation, Inc.
   2    Contributed by Joseph Myers <jsm28@cam.ac.uk>.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 /* This header provides a declarative way of describing the attributes
  21    that are applied to some functions by default.
  22
  23    Before including this header, you must define the following macros.
  24    In each case where there is an ENUM, it is an identifier used to
  25    reference the tree in subsequent definitions.
  26
  27    DEF_ATTR_NULL_TREE (ENUM)
  28
  29      Constructs a NULL_TREE.
  30
  31    DEF_ATTR_INT (ENUM, VALUE)
  32
  33      Constructs an INTEGER_CST with value VALUE (an integer representable
  34      in HOST_WIDE_INT).
  35
  36    DEF_ATTR_IDENT (ENUM, STRING)
  37
  38      Constructs an IDENTIFIER_NODE for STRING.
  39
  40    DEF_ATTR_TREE_LIST (ENUM, PURPOSE, VALUE, CHAIN)
  41
  42      Constructs a TREE_LIST with given PURPOSE, VALUE and CHAIN (given
  43      as previous ENUM names).  */
  44
  45 DEF_ATTR_NULL_TREE (ATTR_NULL)
  46
  47 /* Construct a tree for a given integer and a list containing it.  */
  48 #define DEF_ATTR_FOR_INT(VALUE)                                 \
  49   DEF_ATTR_INT (ATTR_##VALUE, VALUE)                    \
  50   DEF_ATTR_TREE_LIST (ATTR_LIST_##VALUE, ATTR_NULL,     \
  51                       ATTR_##VALUE, ATTR_NULL)
  52 DEF_ATTR_FOR_INT (0)
  53 DEF_ATTR_FOR_INT (1)
  54 DEF_ATTR_FOR_INT (2)
  55 DEF_ATTR_FOR_INT (3)
  56 DEF_ATTR_FOR_INT (4)
  57 DEF_ATTR_FOR_INT (5)
  58 DEF_ATTR_FOR_INT (6)
  59 #undef DEF_ATTR_FOR_INT
  60
  61 /* Construct a tree for a given string and a list containing it.  */
  62 #define DEF_ATTR_FOR_STRING(ENUM, VALUE)                                        \
  63   DEF_ATTR_STRING (ATTR_##ENUM, VALUE)                  \
  64   DEF_ATTR_TREE_LIST (ATTR_LIST_##ENUM, ATTR_NULL,      \
  65                       ATTR_##ENUM, ATTR_NULL)
  66 DEF_ATTR_FOR_STRING (STR1, "1")
  67 #undef DEF_ATTR_FOR_STRING
  68
  69 /* Construct a tree for a list of two integers.  */
  70 #define DEF_LIST_INT_INT(VALUE1, VALUE2)                                 \
  71   DEF_ATTR_TREE_LIST (ATTR_LIST_##VALUE1##_##VALUE2, ATTR_NULL,          \
  72                       ATTR_##VALUE1, ATTR_LIST_##VALUE2)
  73 DEF_LIST_INT_INT (1,0)
  74 DEF_LIST_INT_INT (1,2)
  75 DEF_LIST_INT_INT (2,0)
  76 DEF_LIST_INT_INT (2,3)
  77 DEF_LIST_INT_INT (3,0)
  78 DEF_LIST_INT_INT (3,4)
  79 DEF_LIST_INT_INT (4,0)
  80 DEF_LIST_INT_INT (4,5)
  81 DEF_LIST_INT_INT (5,0)
  82 DEF_LIST_INT_INT (5,6)
  83 #undef DEF_LIST_INT_INT
  84
  85 /* Construct trees for identifiers.  */
  86 DEF_ATTR_IDENT (ATTR_COLD, "cold")
  87 DEF_ATTR_IDENT (ATTR_CONST, "const")
  88 DEF_ATTR_IDENT (ATTR_FORMAT, "format")
  89 DEF_ATTR_IDENT (ATTR_FORMAT_ARG, "format_arg")
  90 DEF_ATTR_IDENT (ATTR_MALLOC, "malloc")
  91 DEF_ATTR_IDENT (ATTR_NONNULL, "nonnull")
  92 DEF_ATTR_IDENT (ATTR_NORETURN, "noreturn")
  93 DEF_ATTR_IDENT (ATTR_NOTHROW, "nothrow")
  94 DEF_ATTR_IDENT (ATTR_LEAF, "leaf")
  95 DEF_ATTR_IDENT (ATTR_FNSPEC, "fn spec")
  96 DEF_ATTR_IDENT (ATTR_PRINTF, "printf")
  97 DEF_ATTR_IDENT (ATTR_ASM_FPRINTF, "asm_fprintf")
  98 DEF_ATTR_IDENT (ATTR_GCC_DIAG, "gcc_diag")
  99 DEF_ATTR_IDENT (ATTR_GCC_CDIAG, "gcc_cdiag")
 100 DEF_ATTR_IDENT (ATTR_GCC_CXXDIAG, "gcc_cxxdiag")
 101 DEF_ATTR_IDENT (ATTR_PURE, "pure")
 102 DEF_ATTR_IDENT (ATTR_NOVOPS, "no vops")
 103 DEF_ATTR_IDENT (ATTR_SCANF, "scanf")
 104 DEF_ATTR_IDENT (ATTR_SENTINEL, "sentinel")
 105 DEF_ATTR_IDENT (ATTR_STRFMON, "strfmon")
 106 DEF_ATTR_IDENT (ATTR_STRFTIME, "strftime")
 107 DEF_ATTR_IDENT (ATTR_TYPEGENERIC, "type generic")
 108 DEF_ATTR_IDENT (ATTR_TM_REGPARM, "*tm regparm")
 109 DEF_ATTR_IDENT (ATTR_TM_TMPURE, "transaction_pure")
 110 DEF_ATTR_IDENT (ATTR_RETURNS_TWICE, "returns_twice")
 111
 112 DEF_ATTR_TREE_LIST (ATTR_NOVOPS_LIST, ATTR_NOVOPS, ATTR_NULL, ATTR_NULL)
 113
 114 DEF_ATTR_TREE_LIST (ATTR_NOVOPS_LEAF_LIST, ATTR_LEAF, ATTR_NULL, ATTR_NOVOPS_LIST)
 115
 116 DEF_ATTR_TREE_LIST (ATTR_LEAF_LIST, ATTR_LEAF, ATTR_NULL, ATTR_NULL)
 117
 118 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_LIST, ATTR_NOTHROW, ATTR_NULL, ATTR_NULL)
 119
 120 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_LEAF_LIST, ATTR_LEAF, ATTR_NULL, ATTR_NOTHROW_LIST)
 121
 122 DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_LIST, ATTR_CONST,        \
 123                         ATTR_NULL, ATTR_NOTHROW_LIST)
 124 DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_LEAF_LIST, ATTR_CONST,   \
 125                         ATTR_NULL, ATTR_NOTHROW_LEAF_LIST)
 126 DEF_ATTR_TREE_LIST (ATTR_PURE_NOTHROW_LIST, ATTR_PURE,          \
 127                         ATTR_NULL, ATTR_NOTHROW_LIST)
 128 DEF_ATTR_TREE_LIST (ATTR_PURE_NOTHROW_LEAF_LIST, ATTR_PURE,     \
 129                         ATTR_NULL, ATTR_NOTHROW_LEAF_LIST)
 130 DEF_ATTR_TREE_LIST (ATTR_NORETURN_NOTHROW_LIST, ATTR_NORETURN,  \
 131                         ATTR_NULL, ATTR_NOTHROW_LIST)
 132 DEF_ATTR_TREE_LIST (ATTR_NORETURN_NOTHROW_LEAF_LIST, ATTR_NORETURN,\
 133                         ATTR_NULL, ATTR_NOTHROW_LEAF_LIST)
 134 DEF_ATTR_TREE_LIST (ATTR_COLD_NOTHROW_LEAF_LIST, ATTR_COLD,\
 135                         ATTR_NULL, ATTR_NOTHROW_LEAF_LIST)
 136 DEF_ATTR_TREE_LIST (ATTR_COLD_NORETURN_NOTHROW_LEAF_LIST, ATTR_COLD,\
 137                         ATTR_NULL, ATTR_NORETURN_NOTHROW_LEAF_LIST)
 138 DEF_ATTR_TREE_LIST (ATTR_CONST_NORETURN_NOTHROW_LEAF_LIST, ATTR_CONST,\
 139                         ATTR_NULL, ATTR_NORETURN_NOTHROW_LEAF_LIST)
 140 DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_LIST, ATTR_MALLOC,      \
 141                         ATTR_NULL, ATTR_NOTHROW_LIST)
 142 DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_LEAF_LIST, ATTR_MALLOC, \
 143                         ATTR_NULL, ATTR_NOTHROW_LEAF_LIST)
 144 DEF_ATTR_TREE_LIST (ATTR_SENTINEL_NOTHROW_LIST, ATTR_SENTINEL,  \
 145                         ATTR_NULL, ATTR_NOTHROW_LIST)
 146 DEF_ATTR_TREE_LIST (ATTR_SENTINEL_NOTHROW_LEAF_LIST, ATTR_SENTINEL,     \
 147                         ATTR_NULL, ATTR_NOTHROW_LEAF_LIST)
 148
 149 /* Functions whose pointer parameter(s) are all nonnull.  */
 150 DEF_ATTR_TREE_LIST (ATTR_NONNULL_LIST, ATTR_NONNULL, ATTR_NULL, ATTR_NULL)
 151 /* Functions whose first parameter is a nonnull pointer.  */
 152 DEF_ATTR_TREE_LIST (ATTR_NONNULL_1, ATTR_NONNULL, ATTR_LIST_1, ATTR_NULL)
 153 /* Functions whose second parameter is a nonnull pointer.  */
 154 DEF_ATTR_TREE_LIST (ATTR_NONNULL_2, ATTR_NONNULL, ATTR_LIST_2, ATTR_NULL)
 155 /* Functions whose third parameter is a nonnull pointer.  */
 156 DEF_ATTR_TREE_LIST (ATTR_NONNULL_3, ATTR_NONNULL, ATTR_LIST_3, ATTR_NULL)
 157 /* Nothrow functions with the sentinel(1) attribute. */
 158 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_SENTINEL_1, ATTR_SENTINEL, ATTR_LIST_1, \
 159                         ATTR_NOTHROW_LIST)
 160 /* Nothrow functions whose pointer parameter(s) are all nonnull.  */
 161 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL, ATTR_NONNULL, ATTR_NULL, \
 162                         ATTR_NOTHROW_LIST)
 163 /* Nothrow leaf functions whose pointer parameter(s) are all nonnull.  */
 164 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_LEAF, ATTR_NONNULL, ATTR_NULL, \
 165                         ATTR_NOTHROW_LEAF_LIST)
 166 /* Nothrow functions whose first parameter is a nonnull pointer.  */
 167 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_1, ATTR_NONNULL, ATTR_LIST_1, \
 168                         ATTR_NOTHROW_LIST)
 169 /* Nothrow functions whose second parameter is a nonnull pointer.  */
 170 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_2, ATTR_NONNULL, ATTR_LIST_2, \
 171                         ATTR_NOTHROW_LIST)
 172 /* Nothrow functions whose third parameter is a nonnull pointer.  */
 173 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_3, ATTR_NONNULL, ATTR_LIST_3, \
 174                         ATTR_NOTHROW_LIST)
 175 /* Nothrow functions whose fourth parameter is a nonnull pointer.  */
 176 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_4, ATTR_NONNULL, ATTR_LIST_4, \
 177                         ATTR_NOTHROW_LIST)
 178 /* Nothrow functions whose fifth parameter is a nonnull pointer.  */
 179 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_5, ATTR_NONNULL, ATTR_LIST_5, \
 180                         ATTR_NOTHROW_LIST)
 181 /* Nothrow const functions whose pointer parameter(s) are all nonnull.  */
 182 DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_NONNULL, ATTR_CONST, ATTR_NULL, \
 183                         ATTR_NOTHROW_NONNULL)
 184 /* Nothrow leaf functions whose pointer parameter(s) are all nonnull,
 185    and which return their first argument.  */
 186 DEF_ATTR_TREE_LIST (ATTR_RET1_NOTHROW_NONNULL_LEAF, ATTR_FNSPEC, ATTR_LIST_STR1, \
 187                         ATTR_NOTHROW_NONNULL_LEAF)
 188 /* Nothrow const leaf functions whose pointer parameter(s) are all nonnull.  */
 189 DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_NONNULL_LEAF, ATTR_CONST, ATTR_NULL, \
 190                         ATTR_NOTHROW_NONNULL_LEAF)
 191 /* Nothrow const functions which are type-generic.  */
 192 DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_TYPEGENERIC, ATTR_TYPEGENERIC, ATTR_NULL, \
 193                         ATTR_CONST_NOTHROW_LIST)
 194 /* Nothrow const leaf functions which are type-generic.  */
 195 DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_TYPEGENERIC_LEAF, ATTR_TYPEGENERIC, ATTR_NULL, \
 196                         ATTR_CONST_NOTHROW_LEAF_LIST)
 197 /* Nothrow pure functions whose pointer parameter(s) are all nonnull.  */
 198 DEF_ATTR_TREE_LIST (ATTR_PURE_NOTHROW_NONNULL, ATTR_PURE, ATTR_NULL, \
 199                         ATTR_NOTHROW_NONNULL)
 200 /* Nothrow pure leaf functions whose pointer parameter(s) are all nonnull.  */
 201 DEF_ATTR_TREE_LIST (ATTR_PURE_NOTHROW_NONNULL_LEAF, ATTR_PURE, ATTR_NULL, \
 202                         ATTR_NOTHROW_NONNULL_LEAF)
 203 /* Nothrow malloc functions whose pointer parameter(s) are all nonnull.  */
 204 DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_NONNULL, ATTR_MALLOC, ATTR_NULL, \
 205                         ATTR_NOTHROW_NONNULL)
 206 /* Nothrow malloc leaf functions whose pointer parameter(s) are all nonnull.  */
 207 DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_NONNULL_LEAF, ATTR_MALLOC, ATTR_NULL, \
 208                         ATTR_NOTHROW_NONNULL_LEAF)
 209
 210 /* Construct a tree for a format attribute.  */
 211 #define DEF_FORMAT_ATTRIBUTE(TYPE, FA, VALUES)                           \
 212   DEF_ATTR_TREE_LIST (ATTR_##TYPE##_##VALUES, ATTR_NULL,                 \
 213                       ATTR_##TYPE, ATTR_LIST_##VALUES)                   \
 214   DEF_ATTR_TREE_LIST (ATTR_FORMAT_##TYPE##_##VALUES, ATTR_FORMAT,        \
 215                       ATTR_##TYPE##_##VALUES, ATTR_NONNULL_##FA)
 216 #define DEF_FORMAT_ATTRIBUTE_NOTHROW(TYPE, FA, VALUES)                   \
 217   DEF_ATTR_TREE_LIST (ATTR_##TYPE##_##VALUES, ATTR_NULL,                 \
 218                       ATTR_##TYPE, ATTR_LIST_##VALUES)                   \
 219   DEF_ATTR_TREE_LIST (ATTR_FORMAT_##TYPE##_NOTHROW_##VALUES, ATTR_FORMAT,\
 220                       ATTR_##TYPE##_##VALUES, ATTR_NOTHROW_NONNULL_##FA)
 221 #define DEF_FORMAT_ATTRIBUTE_BOTH(TYPE, FA, VALUES)                      \
 222   DEF_ATTR_TREE_LIST (ATTR_##TYPE##_##VALUES, ATTR_NULL,                 \
 223                       ATTR_##TYPE, ATTR_LIST_##VALUES)                   \
 224   DEF_ATTR_TREE_LIST (ATTR_FORMAT_##TYPE##_##VALUES, ATTR_FORMAT,        \
 225                       ATTR_##TYPE##_##VALUES, ATTR_NONNULL_##FA)         \
 226   DEF_ATTR_TREE_LIST (ATTR_FORMAT_##TYPE##_NOTHROW_##VALUES, ATTR_FORMAT,\
 227                       ATTR_##TYPE##_##VALUES, ATTR_NOTHROW_NONNULL_##FA)
 228 DEF_FORMAT_ATTRIBUTE(PRINTF,1,1_0)
 229 DEF_FORMAT_ATTRIBUTE(PRINTF,1,1_2)
 230 DEF_FORMAT_ATTRIBUTE_BOTH(PRINTF,2,2_0)
 231 DEF_FORMAT_ATTRIBUTE_BOTH(PRINTF,2,2_3)
 232 DEF_FORMAT_ATTRIBUTE_BOTH(PRINTF,3,3_0)
 233 DEF_FORMAT_ATTRIBUTE_BOTH(PRINTF,3,3_4)
 234 DEF_FORMAT_ATTRIBUTE_NOTHROW(PRINTF,4,4_0)
 235 DEF_FORMAT_ATTRIBUTE_NOTHROW(PRINTF,4,4_5)
 236 DEF_FORMAT_ATTRIBUTE_NOTHROW(PRINTF,5,5_0)
 237 DEF_FORMAT_ATTRIBUTE_NOTHROW(PRINTF,5,5_6)
 238 DEF_FORMAT_ATTRIBUTE(SCANF,1,1_0)
 239 DEF_FORMAT_ATTRIBUTE(SCANF,1,1_2)
 240 DEF_FORMAT_ATTRIBUTE_BOTH(SCANF,2,2_0)
 241 DEF_FORMAT_ATTRIBUTE_BOTH(SCANF,2,2_3)
 242 DEF_FORMAT_ATTRIBUTE_NOTHROW(STRFTIME,3,3_0)
 243 DEF_FORMAT_ATTRIBUTE_NOTHROW(STRFMON,3,3_4)
 244 #undef DEF_FORMAT_ATTRIBUTE
 245 #undef DEF_FORMAT_ATTRIBUTE_NOTHROW
 246 #undef DEF_FORMAT_ATTRIBUTE_BOTH
 247
 248 /* Transactional memory variants of the above.  */
 249
 250 DEF_ATTR_TREE_LIST (ATTR_TM_NOTHROW_LIST,
 251                     ATTR_TM_REGPARM, ATTR_NULL, ATTR_NOTHROW_LIST)
 252 DEF_ATTR_TREE_LIST (ATTR_TM_TMPURE_NOTHROW_LIST,
 253                     ATTR_TM_TMPURE, ATTR_NULL, ATTR_TM_NOTHROW_LIST)
 254 DEF_ATTR_TREE_LIST (ATTR_TM_PURE_TMPURE_NOTHROW_LIST,
 255                     ATTR_PURE, ATTR_NULL, ATTR_TM_TMPURE_NOTHROW_LIST)
 256 DEF_ATTR_TREE_LIST (ATTR_TM_NORETURN_NOTHROW_LIST,
 257                     ATTR_TM_REGPARM, ATTR_NULL, ATTR_NORETURN_NOTHROW_LIST)
 258 DEF_ATTR_TREE_LIST (ATTR_TM_CONST_NOTHROW_LIST,
 259                     ATTR_TM_REGPARM, ATTR_NULL, ATTR_CONST_NOTHROW_LIST)
 260 DEF_ATTR_TREE_LIST (ATTR_TM_NOTHROW_RT_LIST,
 261                     ATTR_RETURNS_TWICE, ATTR_NULL, ATTR_TM_NOTHROW_LIST)
 262
 263 /* Same attributes used for BUILT_IN_MALLOC except with TM_PURE thrown in.  */
 264 DEF_ATTR_TREE_LIST (ATTR_TMPURE_MALLOC_NOTHROW_LIST,
 265                    ATTR_TM_TMPURE, ATTR_NULL, ATTR_MALLOC_NOTHROW_LIST)
 266 /* Same attributes used for BUILT_IN_FREE except with TM_PURE thrown in.  */
 267 DEF_ATTR_TREE_LIST (ATTR_TMPURE_NOTHROW_LIST,
 268                    ATTR_TM_TMPURE, ATTR_NULL, ATTR_NOTHROW_LIST)
 269
 270 DEF_ATTR_TREE_LIST (ATTR_TMPURE_NOTHROW_LEAF_LIST,
 271                     ATTR_TM_TMPURE, ATTR_NULL, ATTR_NOTHROW_LEAF_LIST)
 272 DEF_ATTR_TREE_LIST (ATTR_TMPURE_NORETURN_NOTHROW_LEAF_LIST,
 273                     ATTR_TM_TMPURE, ATTR_NULL, ATTR_NORETURN_NOTHROW_LEAF_LIST)
 274
 275 /* Construct a tree for a format_arg attribute.  */
 276 #define DEF_FORMAT_ARG_ATTRIBUTE(FA)                                    \
 277   DEF_ATTR_TREE_LIST (ATTR_FORMAT_ARG_##FA, ATTR_FORMAT_ARG,            \
 278                       ATTR_LIST_##FA, ATTR_NOTHROW_NONNULL_##FA)
 279 DEF_FORMAT_ARG_ATTRIBUTE(1)
 280 DEF_FORMAT_ARG_ATTRIBUTE(2)
 281 #undef DEF_FORMAT_ARG_ATTRIBUTE
 282