gcc/builtin-attrs.def

   1 /* Copyright (C) 2001, 2002, 2004 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 2, 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 COPYING.  If not, write to the Free
  18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, USA.  */
  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 #undef DEF_ATTR_FOR_INT
  59
  60 /* Construct a tree for a list of two integers.  */
  61 #define DEF_LIST_INT_INT(VALUE1, VALUE2)                                 \
  62   DEF_ATTR_TREE_LIST (ATTR_LIST_##VALUE1##_##VALUE2, ATTR_NULL,          \
  63                       ATTR_##VALUE1, ATTR_LIST_##VALUE2)
  64 DEF_LIST_INT_INT (1,0)
  65 DEF_LIST_INT_INT (1,2)
  66 DEF_LIST_INT_INT (2,0)
  67 DEF_LIST_INT_INT (2,3)
  68 DEF_LIST_INT_INT (3,0)
  69 DEF_LIST_INT_INT (3,4)
  70 #undef DEF_LIST_INT_INT
  71
  72 /* Construct trees for identifiers.  */
  73 DEF_ATTR_IDENT (ATTR_CONST, "const")
  74 DEF_ATTR_IDENT (ATTR_FORMAT, "format")
  75 DEF_ATTR_IDENT (ATTR_FORMAT_ARG, "format_arg")
  76 DEF_ATTR_IDENT (ATTR_MALLOC, "malloc")
  77 DEF_ATTR_IDENT (ATTR_NONNULL, "nonnull")
  78 DEF_ATTR_IDENT (ATTR_NORETURN, "noreturn")
  79 DEF_ATTR_IDENT (ATTR_NOTHROW, "nothrow")
  80 DEF_ATTR_IDENT (ATTR_PRINTF, "printf")
  81 DEF_ATTR_IDENT (ATTR_ASM_FPRINTF, "asm_fprintf")
  82 DEF_ATTR_IDENT (ATTR_GCC_DIAG, "gcc_diag")
  83 DEF_ATTR_IDENT (ATTR_GCC_CDIAG, "gcc_cdiag")
  84 DEF_ATTR_IDENT (ATTR_GCC_CXXDIAG, "gcc_cxxdiag")
  85 DEF_ATTR_IDENT (ATTR_PURE, "pure")
  86 DEF_ATTR_IDENT (ATTR_SCANF, "scanf")
  87 DEF_ATTR_IDENT (ATTR_SENTINEL, "sentinel")
  88 DEF_ATTR_IDENT (ATTR_STRFMON, "strfmon")
  89 DEF_ATTR_IDENT (ATTR_STRFTIME, "strftime")
  90
  91 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_LIST, ATTR_NOTHROW, ATTR_NULL, ATTR_NULL)
  92
  93 DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_LIST, ATTR_CONST,        \
  94                         ATTR_NULL, ATTR_NOTHROW_LIST)
  95 DEF_ATTR_TREE_LIST (ATTR_PURE_NOTHROW_LIST, ATTR_PURE,          \
  96                         ATTR_NULL, ATTR_NOTHROW_LIST)
  97 DEF_ATTR_TREE_LIST (ATTR_NORETURN_NOTHROW_LIST, ATTR_NORETURN,  \
  98                         ATTR_NULL, ATTR_NOTHROW_LIST)
  99 DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_LIST, ATTR_MALLOC,      \
 100                         ATTR_NULL, ATTR_NOTHROW_LIST)
 101 DEF_ATTR_TREE_LIST (ATTR_SENTINEL_NOTHROW_LIST, ATTR_SENTINEL,  \
 102                         ATTR_NULL, ATTR_NOTHROW_LIST)
 103
 104 /* Functions whose pointer parameter(s) are all nonnull.  */
 105 DEF_ATTR_TREE_LIST (ATTR_NONNULL_LIST, ATTR_NONNULL, ATTR_NULL, ATTR_NULL)
 106 /* Functions whose first parameter is a nonnull pointer.  */
 107 DEF_ATTR_TREE_LIST (ATTR_NONNULL_1, ATTR_NONNULL, ATTR_LIST_1, ATTR_NULL)
 108 /* Functions whose second parameter is a nonnull pointer.  */
 109 DEF_ATTR_TREE_LIST (ATTR_NONNULL_2, ATTR_NONNULL, ATTR_LIST_2, ATTR_NULL)
 110 /* Nothrow functions with the sentinel(1) attribute. */
 111 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_SENTINEL_1, ATTR_SENTINEL, ATTR_LIST_1, \
 112                         ATTR_NOTHROW_LIST)
 113 /* Nothrow functions whose pointer parameter(s) are all nonnull.  */
 114 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL, ATTR_NONNULL, ATTR_NULL, \
 115                         ATTR_NOTHROW_LIST)
 116 /* Nothrow functions whose first parameter is a nonnull pointer.  */
 117 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_1, ATTR_NONNULL, ATTR_LIST_1, \
 118                         ATTR_NOTHROW_LIST)
 119 /* Nothrow functions whose second parameter is a nonnull pointer.  */
 120 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_2, ATTR_NONNULL, ATTR_LIST_2, \
 121                         ATTR_NOTHROW_LIST)
 122 /* Nothrow functions whose third parameter is a nonnull pointer.  */
 123 DEF_ATTR_TREE_LIST (ATTR_NOTHROW_NONNULL_3, ATTR_NONNULL, ATTR_LIST_3, \
 124                         ATTR_NOTHROW_LIST)
 125 /* Nothrow const functions whose pointer parameter(s) are all nonnull.  */
 126 DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_NONNULL, ATTR_CONST, ATTR_NULL, \
 127                         ATTR_NOTHROW_NONNULL)
 128 /* Nothrow pure functions whose pointer parameter(s) are all nonnull.  */
 129 DEF_ATTR_TREE_LIST (ATTR_PURE_NOTHROW_NONNULL, ATTR_PURE, ATTR_NULL, \
 130                         ATTR_NOTHROW_NONNULL)
 131 /* Nothrow malloc functions whose pointer parameter(s) are all nonnull.  */
 132 DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_NONNULL, ATTR_MALLOC, ATTR_NULL, \
 133                         ATTR_NOTHROW_NONNULL)
 134
 135 /* Construct a tree for a format attribute.  */
 136 #define DEF_FORMAT_ATTRIBUTE(TYPE, FA, VALUES)                           \
 137   DEF_ATTR_TREE_LIST (ATTR_##TYPE##_##VALUES, ATTR_NULL,                 \
 138                       ATTR_##TYPE, ATTR_LIST_##VALUES)                   \
 139   DEF_ATTR_TREE_LIST (ATTR_FORMAT_##TYPE##_##VALUES, ATTR_FORMAT,        \
 140                       ATTR_##TYPE##_##VALUES, ATTR_NOTHROW_NONNULL_##FA)
 141 DEF_FORMAT_ATTRIBUTE(PRINTF,1,1_0)
 142 DEF_FORMAT_ATTRIBUTE(PRINTF,1,1_2)
 143 DEF_FORMAT_ATTRIBUTE(PRINTF,2,2_0)
 144 DEF_FORMAT_ATTRIBUTE(PRINTF,2,2_3)
 145 DEF_FORMAT_ATTRIBUTE(PRINTF,3,3_0)
 146 DEF_FORMAT_ATTRIBUTE(PRINTF,3,3_4)
 147 DEF_FORMAT_ATTRIBUTE(SCANF,1,1_0)
 148 DEF_FORMAT_ATTRIBUTE(SCANF,1,1_2)
 149 DEF_FORMAT_ATTRIBUTE(SCANF,2,2_0)
 150 DEF_FORMAT_ATTRIBUTE(SCANF,2,2_3)
 151 DEF_FORMAT_ATTRIBUTE(STRFTIME,3,3_0)
 152 DEF_FORMAT_ATTRIBUTE(STRFMON,3,3_4)
 153 #undef DEF_FORMAT_ATTRIBUTE
 154
 155 /* Construct a tree for a format_arg attribute.  */
 156 #define DEF_FORMAT_ARG_ATTRIBUTE(FA)                                    \
 157   DEF_ATTR_TREE_LIST (ATTR_FORMAT_ARG_##FA, ATTR_FORMAT_ARG,            \
 158                       ATTR_LIST_##FA, ATTR_NOTHROW_NONNULL_##FA)
 159 DEF_FORMAT_ARG_ATTRIBUTE(1)
 160 DEF_FORMAT_ARG_ATTRIBUTE(2)
 161 #undef DEF_FORMAT_ARG_ATTRIBUTE
 162