mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2025-03-10 20:07:23 +08:00
Code Issues Packages Projects Releases Wiki Activity
aba8a49486
gcc/gcc/builtin-attrs.def
Roger Sayle df061a43b6 re PR c++/7099 (G++ doesn't set the noreturn attribute on std::exit and std::abort) 
PR c++/7099
	* builtin-attrs.def: Define new attribute lists for use in
	builtins.def.
	* builtins.def [DEF_BUILTIN]: Modify to take an additional
	ATTRS argument, an enumerated value defined in builtin-attrs.def
	that represents the attribute list for the builtins.  Modify
	all builtin functions to pass an appropriate attribute list.
	Specify "abort", "exit", "_exit" and "_Exit" builtins here with
	their required noreturn attributes.
	* tree.h (enum_builtin_function): Ignore the additional parameter
	to DEF_BUILTIN.
	* builtins.c (built_in_names): Likewise.
	* c-common.c: (builtin_function_2): Replace the "int noreturn_p"
	argument with a tree representing the functions attribute list.
	Pass this "attrs" argument to builtin_function.  No longer handle
	the noreturn_p processing manually.
	(built_in_attributes): Move the definitions from builtin-attrs.def
	before c_common_nodes_and_builtins.
	(c_common_nodes_and_builtins): Handle the new ATTRS parameter in
	DEF_BUILTIN, passing it to both builtin_function and the changed
	builtin_function_2.

	* doc/extend.texi: Document __builtin_abort, __builtin_exit,
	__builtin__exit and __builtin__Exit.

	* java/builtins.c (initialize_builtins): Ignore the additional
	parameter to DEF_BUILTIN.  Handle more C/C++ specific junk in
	the builtins.def file.

From-SVN: r55276
2002-07-06 00:16:44 +00:00

186 lines
7.0 KiB
Modula-2
Raw Blame History

/* Copyright (C) 2001, 2002 Free Software Foundation, Inc.
Contributed by Joseph Myers <jsm28@cam.ac.uk>.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
/* This header provides a declarative way of describing the attributes
that are applied to some functions by default.
Before including this header, you must define the following macros.
In each case where there is an ENUM, it is an identifier used to
reference the tree in subsequent definitions.
DEF_ATTR_NULL_TREE (ENUM)
Constructs a NULL_TREE.
DEF_ATTR_INT (ENUM, VALUE)
Constructs an INTEGER_CST with value VALUE (an integer representable
in HOST_WIDE_INT).
DEF_ATTR_IDENT (ENUM, STRING)
Constructs an IDENTIFIER_NODE for STRING.
DEF_ATTR_TREE_LIST (ENUM, PURPOSE, VALUE, CHAIN)
Constructs a TREE_LIST with given PURPOSE, VALUE and CHAIN (given
as previous ENUM names).
DEF_FN_ATTR (NAME, ATTRS, PREDICATE)
Specifies that the function with name NAME (a previous ENUM for an
IDENTIFIER_NODE) has attributes ATTRS (a previous ENUM) if
PREDICATE is true. */
DEF_ATTR_NULL_TREE (ATTR_NULL)
/* Note that below we must avoid whitespace in arguments of CONCAT*. */
/* Construct a tree for a given integer and a list containing it. */
#define DEF_ATTR_FOR_INT(VALUE) \
DEF_ATTR_INT (CONCAT2 (ATTR_,VALUE), VALUE) \
DEF_ATTR_TREE_LIST (CONCAT2 (ATTR_LIST_,VALUE), ATTR_NULL, \
CONCAT2 (ATTR_,VALUE), ATTR_NULL)
DEF_ATTR_FOR_INT (0)
DEF_ATTR_FOR_INT (1)
DEF_ATTR_FOR_INT (2)
DEF_ATTR_FOR_INT (3)
DEF_ATTR_FOR_INT (4)
#undef DEF_ATTR_FOR_INT
/* Construct a tree for a list of two integers. */
#define DEF_LIST_INT_INT(VALUE1, VALUE2) \
DEF_ATTR_TREE_LIST (CONCAT4 (ATTR_LIST_,VALUE1,_,VALUE2), ATTR_NULL, \
CONCAT2 (ATTR_,VALUE1), CONCAT2 (ATTR_LIST_,VALUE2))
DEF_LIST_INT_INT (1,0)
DEF_LIST_INT_INT (1,2)
DEF_LIST_INT_INT (2,0)
DEF_LIST_INT_INT (2,3)
DEF_LIST_INT_INT (3,0)
DEF_LIST_INT_INT (3,4)
#undef DEF_LIST_INT_INT
/* Construct tress for identifiers. */
DEF_ATTR_IDENT (ATTR_CONST, "const")
DEF_ATTR_IDENT (ATTR_FORMAT, "format")
DEF_ATTR_IDENT (ATTR_FORMAT_ARG, "format_arg")
DEF_ATTR_IDENT (ATTR_MALLOC, "malloc")
DEF_ATTR_IDENT (ATTR_NONNULL, "nonnull")
DEF_ATTR_IDENT (ATTR_NORETURN, "noreturn")
DEF_ATTR_IDENT (ATTR_NOTHROW, "nothrow")
DEF_ATTR_IDENT (ATTR_PRINTF, "printf")
DEF_ATTR_IDENT (ATTR_PURE, "pure")
DEF_ATTR_IDENT (ATTR_SCANF, "scanf")
DEF_ATTR_IDENT (ATTR_STRFMON, "strfmon")
DEF_ATTR_IDENT (ATTR_STRFTIME, "strftime")
DEF_ATTR_TREE_LIST (ATTR_NOTHROW_LIST, ATTR_NOTHROW, ATTR_NULL, ATTR_NULL)
DEF_ATTR_TREE_LIST (ATTR_CONST_NOTHROW_LIST, ATTR_CONST, \
ATTR_NULL, ATTR_NOTHROW_LIST)
DEF_ATTR_TREE_LIST (ATTR_PURE_NOTHROW_LIST, ATTR_PURE, \
ATTR_NULL, ATTR_NOTHROW_LIST)
DEF_ATTR_TREE_LIST (ATTR_NORETURN_NOTHROW_LIST, ATTR_NORETURN, \
ATTR_NULL, ATTR_NOTHROW_LIST)
DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_LIST, ATTR_MALLOC, \
ATTR_NULL, ATTR_NOTHROW_LIST)
DEF_ATTR_TREE_LIST (ATTR_NONNULL_1, ATTR_NONNULL, ATTR_LIST_1, ATTR_NULL)
DEF_ATTR_TREE_LIST (ATTR_NONNULL_2, ATTR_NONNULL, ATTR_LIST_2, ATTR_NULL)
DEF_ATTR_TREE_LIST (ATTR_NONNULL_3, ATTR_NONNULL, ATTR_LIST_3, ATTR_NULL)
/* Construct a tree for a format attribute. */
#define DEF_FORMAT_ATTRIBUTE(TYPE, FA, VALUES) \
DEF_ATTR_TREE_LIST (CONCAT4 (ATTR_,TYPE,_,VALUES), ATTR_NULL, \
CONCAT2 (ATTR_,TYPE), CONCAT2 (ATTR_LIST_,VALUES)) \
DEF_ATTR_TREE_LIST (CONCAT4 (ATTR_FORMAT_,TYPE,_,VALUES), ATTR_FORMAT, \
CONCAT4 (ATTR_,TYPE,_,VALUES), CONCAT2 (ATTR_NONNULL_,FA))
DEF_FORMAT_ATTRIBUTE(PRINTF,1,1_0)
DEF_FORMAT_ATTRIBUTE(PRINTF,1,1_2)
DEF_FORMAT_ATTRIBUTE(PRINTF,2,2_0)
DEF_FORMAT_ATTRIBUTE(PRINTF,2,2_3)
DEF_FORMAT_ATTRIBUTE(PRINTF,3,3_0)
DEF_FORMAT_ATTRIBUTE(PRINTF,3,3_4)
DEF_FORMAT_ATTRIBUTE(SCANF,1,1_0)
DEF_FORMAT_ATTRIBUTE(SCANF,1,1_2)
DEF_FORMAT_ATTRIBUTE(SCANF,2,2_0)
DEF_FORMAT_ATTRIBUTE(SCANF,2,2_3)
DEF_FORMAT_ATTRIBUTE(STRFTIME,3,3_0)
DEF_FORMAT_ATTRIBUTE(STRFMON,3,3_4)
#undef DEF_FORMAT_ATTRIBUTE
/* Construct a tree for a format_arg attribute. */
#define DEF_FORMAT_ARG_ATTRIBUTE(FA) \
DEF_ATTR_TREE_LIST (CONCAT2 (ATTR_FORMAT_ARG_,FA), ATTR_FORMAT_ARG, \
CONCAT2 (ATTR_LIST_,FA), CONCAT2 (ATTR_NONNULL_,FA))
DEF_FORMAT_ARG_ATTRIBUTE(1)
DEF_FORMAT_ARG_ATTRIBUTE(2)
#undef DEF_FORMAT_ARG_ATTRIBUTE
/* Define an attribute for a function, along with the IDENTIFIER_NODE. */
#define DEF_FN_ATTR_IDENT(NAME, ATTRS, PREDICATE) \
DEF_ATTR_IDENT (CONCAT2(ATTR_,NAME), STRINGX(NAME)) \
DEF_FN_ATTR (CONCAT2(ATTR_,NAME), ATTRS, PREDICATE)
/* The ISO C functions are always checked (whether <stdio.h> is
included or not), since it is common to call printf without
including <stdio.h>. There shouldn't be a problem with this,
since ISO C reserves these function names whether you include the
header file or not. In any case, the checking is harmless. With
-ffreestanding, these default attributes are disabled, and must be
specified manually if desired. */
/* Functions from ISO/IEC 9899:1990. */
#define DEF_C89_ATTR(NAME, ATTRS) DEF_FN_ATTR_IDENT (NAME, ATTRS, flag_hosted)
DEF_C89_ATTR (sprintf, ATTR_FORMAT_PRINTF_2_3)
DEF_C89_ATTR (scanf, ATTR_FORMAT_SCANF_1_2)
DEF_C89_ATTR (fscanf, ATTR_FORMAT_SCANF_2_3)
DEF_C89_ATTR (sscanf, ATTR_FORMAT_SCANF_2_3)
DEF_C89_ATTR (vprintf, ATTR_FORMAT_PRINTF_1_0)
DEF_C89_ATTR (vfprintf, ATTR_FORMAT_PRINTF_2_0)
DEF_C89_ATTR (vsprintf, ATTR_FORMAT_PRINTF_2_0)
DEF_C89_ATTR (strftime, ATTR_FORMAT_STRFTIME_3_0)
#undef DEF_C89_ATTR
/* ISO C99 adds the snprintf and vscanf family functions. */
#define DEF_C99_ATTR(NAME, ATTRS) \
DEF_FN_ATTR_IDENT (NAME, ATTRS, \
(flag_hosted \
&& (flag_isoc99 || flag_noniso_default_format_attributes)))
DEF_C99_ATTR (snprintf, ATTR_FORMAT_PRINTF_3_4)
DEF_C99_ATTR (vsnprintf, ATTR_FORMAT_PRINTF_3_0)
DEF_C99_ATTR (vscanf, ATTR_FORMAT_SCANF_1_0)
DEF_C99_ATTR (vfscanf, ATTR_FORMAT_SCANF_2_0)
DEF_C99_ATTR (vsscanf, ATTR_FORMAT_SCANF_2_0)
#undef DEF_C99_ATTR
/* Functions not in any version of ISO C. */
#define DEF_EXT_ATTR(NAME, ATTRS) \
DEF_FN_ATTR_IDENT (NAME, ATTRS, \
flag_hosted && flag_noniso_default_format_attributes)
/* Uniforum/GNU gettext functions. */
DEF_EXT_ATTR (gettext, ATTR_FORMAT_ARG_1)
DEF_EXT_ATTR (dgettext, ATTR_FORMAT_ARG_2)
DEF_EXT_ATTR (dcgettext, ATTR_FORMAT_ARG_2)
/* X/Open strfmon function. */
DEF_EXT_ATTR (strfmon, ATTR_FORMAT_STRFMON_3_4)
#undef DEF_EXT_ATTR
#undef DEF_FN_ATTR_IDENT
Reference in New Issue View Git Blame Copy Permalink