/* Declarations and definitions dealing with attribute handling.
- Copyright (C) 2013-2018 Free Software Foundation, Inc.
+ Copyright (C) 2013-2022 Free Software Foundation, Inc.
This file is part of GCC.
#define GCC_ATTRIBS_H
extern const struct attribute_spec *lookup_attribute_spec (const_tree);
+extern void free_attr_data ();
extern void init_attributes (void);
/* Process the attributes listed in ATTRIBUTES and install them in *NODE,
extern bool cxx11_attribute_p (const_tree);
extern tree get_attribute_name (const_tree);
+extern tree get_attribute_namespace (const_tree);
extern void apply_tm_attr (tree, tree);
extern tree make_attribute (const char *, const char *, tree);
+extern bool attribute_ignored_p (tree);
+extern bool attribute_ignored_p (const attribute_spec *const);
extern struct scoped_attributes* register_scoped_attributes (const struct attribute_spec *,
- const char *);
+ const char *,
+ bool = false);
extern char *sorted_attr_string (tree);
extern bool common_function_versions (tree, tree);
-extern char *make_unique_name (tree, const char *, bool);
extern tree make_dispatcher_decl (const tree);
extern bool is_function_default_version (const tree);
+extern void handle_ignored_attributes_option (vec<char *> *);
/* Return a type like TTYPE except that its TYPE_ATTRIBUTES
is ATTRIBUTE.
extern tree build_decl_attribute_variant (tree, tree);
extern tree build_type_attribute_qual_variant (tree, tree, int);
+extern bool simple_cst_list_equal (const_tree, const_tree);
extern bool attribute_value_equal (const_tree, const_tree);
/* Return 0 if the attributes for two types are incompatible, 1 if they
warning to be generated). */
extern int comp_type_attributes (const_tree, const_tree);
+extern tree affects_type_identity_attributes (tree, bool = true);
+extern tree restrict_type_identity_attributes_to (tree, tree);
+
/* Default versions of target-overridable functions. */
extern tree merge_decl_attributes (tree, tree);
extern tree merge_type_attributes (tree, tree);
extern void maybe_diag_alias_attributes (tree, tree);
+/* For a given string S of length L, strip leading and trailing '_' characters
+ so that we have a canonical form of attribute names. NB: This function may
+ change S and L. */
+
+template <typename T>
+inline bool
+canonicalize_attr_name (const char *&s, T &l)
+{
+ if (l > 4 && s[0] == '_' && s[1] == '_' && s[l - 1] == '_' && s[l - 2] == '_')
+ {
+ s += 2;
+ l -= 4;
+ return true;
+ }
+ return false;
+}
+
/* For a given IDENTIFIER_NODE, strip leading and trailing '_' characters
so that we have a canonical form of attribute names. */
static inline tree
canonicalize_attr_name (tree attr_name)
{
- const size_t l = IDENTIFIER_LENGTH (attr_name);
+ size_t l = IDENTIFIER_LENGTH (attr_name);
const char *s = IDENTIFIER_POINTER (attr_name);
- if (l > 4 && s[0] == '_' && s[1] == '_' && s[l - 1] == '_' && s[l - 2] == '_')
- return get_identifier_with_length (s + 2, l - 4);
+ if (canonicalize_attr_name (s, l))
+ return get_identifier_with_length (s, l);
return attr_name;
}
static inline tree
lookup_attribute (const char *attr_name, tree list)
{
- gcc_checking_assert (attr_name[0] != '_');
+ if (CHECKING_P && attr_name[0] != '_')
+ {
+ size_t attr_len = strlen (attr_name);
+ gcc_checking_assert (!canonicalize_attr_name (attr_name, attr_len));
+ }
/* In most cases, list is NULL_TREE. */
if (list == NULL_TREE)
return NULL_TREE;
size_t attr_len = strlen (attr_name);
while (list)
{
- size_t ident_len = IDENTIFIER_LENGTH (get_attribute_name (list));
+ tree name = get_attribute_name (list);
+ size_t ident_len = IDENTIFIER_LENGTH (name);
if (attr_len > ident_len)
{
continue;
}
- const char *p = IDENTIFIER_POINTER (get_attribute_name (list));
+ const char *p = IDENTIFIER_POINTER (name);
gcc_checking_assert (attr_len == 0 || p[0] != '_');
if (strncmp (attr_name, p, attr_len) == 0)
}
}
+/* Description of a function argument declared with attribute access.
+ Used as an "iterator" over all such arguments in a function declaration
+ or call. */
+
+struct attr_access
+{
+ /* The beginning and end of the internal string representation. */
+ const char *str, *end;
+ /* The attribute pointer argument. */
+ tree ptr;
+ /* For a declaration, a TREE_CHAIN of VLA bound expressions stored
+ in TREE_VALUE and their positions in the argument list (stored
+ in TREE_PURPOSE). Each expression may be a PARM_DECL or some
+ other DECL (for ordinary variables), or an EXPR for other
+ expressions (e.g., funcion calls). */
+ tree size;
+
+ /* The zero-based position of each of the formal function arguments.
+ For the optional SIZARG, UINT_MAX when not specified. For VLAs
+ with multiple variable bounds, SIZARG is the position corresponding
+ to the most significant bound in the argument list. Positions of
+ subsequent bounds are in the TREE_PURPOSE field of the SIZE chain. */
+ unsigned ptrarg;
+ unsigned sizarg;
+ /* For internal specifications only, the constant minimum size of
+ the array, zero if not specified, and HWI_M1U for the unspecified
+ VLA [*] notation. Meaningless for external (explicit) access
+ specifications. */
+ unsigned HOST_WIDE_INT minsize;
+
+ /* The access mode. */
+ access_mode mode;
+
+ /* Set for an attribute added internally rather than by an explicit
+ declaration. */
+ bool internal_p;
+ /* Set for the T[static MINSIZE] array notation for nonzero MINSIZE
+ less than HWI_M1U. */
+ bool static_p;
+
+ /* Return the number of specified VLA bounds. */
+ unsigned vla_bounds (unsigned *) const;
+
+ /* Return internal representation as STRING_CST. */
+ tree to_internal_string () const;
+
+ /* Return the human-readable representation of the external attribute
+ specification (as it might appear in the source code) as STRING_CST. */
+ tree to_external_string () const;
+
+ /* Return argument of array type formatted as a readable string. */
+ std::string array_as_string (tree) const;
+
+ /* Return the access mode corresponding to the character code. */
+ static access_mode from_mode_char (char);
+
+ /* Reset front end-specific attribute access data from attributes. */
+ static void free_lang_data (tree);
+
+ /* The character codes corresponding to all the access modes. */
+ static constexpr char mode_chars[5] = { '-', 'r', 'w', 'x', '^' };
+
+ /* The strings corresponding to just the external access modes. */
+ static constexpr char mode_names[4][11] =
+ {
+ "none", "read_only", "write_only", "read_write"
+ };
+};
+
+inline access_mode
+attr_access::from_mode_char (char c)
+{
+ switch (c)
+ {
+ case mode_chars[access_none]: return access_none;
+ case mode_chars[access_read_only]: return access_read_only;
+ case mode_chars[access_write_only]: return access_write_only;
+ case mode_chars[access_read_write]: return access_read_write;
+ case mode_chars[access_deferred]: return access_deferred;
+ }
+ gcc_unreachable ();
+}
+
+/* Used to define rdwr_map below. */
+struct rdwr_access_hash: int_hash<int, -1> { };
+
+/* A mapping between argument number corresponding to attribute access
+ mode (read_only, write_only, or read_write) and operands. */
+struct attr_access;
+typedef hash_map<rdwr_access_hash, attr_access> rdwr_map;
+
+extern void init_attr_rdwr_indices (rdwr_map *, tree);
+extern attr_access *get_parm_access (rdwr_map &, tree,
+ tree = current_function_decl);
+
#endif // GCC_ATTRIBS_H
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