/* RunTime Type Identification
- Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000
+ Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001
Free Software Foundation, Inc.
Mostly written by Jason Merrill (jason@cygnus.com).
#include "assert.h"
#include "toplev.h"
-#ifndef INT_TYPE_SIZE
-#define INT_TYPE_SIZE BITS_PER_WORD
-#endif
-
/* Accessors for the type_info objects. We need to remember several things
about each of the type_info types. The global tree nodes such as
bltn_desc_type_node are TREE_LISTs, and these macros are used to access
extern struct obstack permanent_obstack;
-static tree build_headof_sub PARAMS((tree));
static tree build_headof PARAMS((tree));
-static tree get_tinfo_var PARAMS((tree));
static tree ifnonnull PARAMS((tree, tree));
static tree tinfo_name PARAMS((tree));
-static tree get_base_offset PARAMS((tree, tree));
static tree build_dynamic_cast_1 PARAMS((tree, tree));
-static void expand_si_desc PARAMS((tree, tree));
-static void expand_class_desc PARAMS((tree, tree));
-static void expand_attr_desc PARAMS((tree, tree));
-static void expand_ptr_desc PARAMS((tree, tree));
-static void expand_generic_desc PARAMS((tree, tree, const char *));
static tree throw_bad_cast PARAMS((void));
static tree throw_bad_typeid PARAMS((void));
static tree get_tinfo_decl_dynamic PARAMS((tree));
-static tree tinfo_from_decl PARAMS((tree));
+static bool typeid_ok_p PARAMS ((void));
static int qualifier_flags PARAMS((tree));
static int target_incomplete_p PARAMS((tree));
static tree tinfo_base_init PARAMS((tree, tree));
static int class_hint_flags PARAMS((tree));
static tree class_initializer PARAMS((tree, tree, tree));
static tree synthesize_tinfo_var PARAMS((tree, tree));
-static tree create_real_tinfo_var PARAMS((tree, tree, tree, int));
+static tree create_real_tinfo_var PARAMS((tree, tree, tree, tree, int));
static tree create_pseudo_type_info PARAMS((const char *, int, ...));
static tree get_vmi_pseudo_type_info PARAMS((int));
static void create_tinfo_types PARAMS((void));
+static int typeinfo_in_lib_p PARAMS((tree));
static int doing_runtime = 0;
\f
void
init_rtti_processing ()
{
- if (flag_honor_std)
- push_namespace (get_identifier ("std"));
+ push_namespace (std_identifier);
type_info_type_node = xref_tag
(class_type_node, get_identifier ("type_info"), 1);
- if (flag_honor_std)
- pop_namespace ();
- if (!new_abi_rtti_p ())
- {
- tinfo_decl_id = get_identifier ("__tf");
- tinfo_decl_type = build_function_type
- (build_reference_type
- (build_qualified_type
- (type_info_type_node, TYPE_QUAL_CONST)),
- void_list_node);
- tinfo_var_id = get_identifier ("__ti");
- }
- else
- {
- /* FIXME: These identifier prefixes are not set in stone yet. */
- tinfo_decl_id = get_identifier ("__ti");
- tinfo_var_id = get_identifier ("__tn");
- tinfo_decl_type = build_qualified_type
- (type_info_type_node, TYPE_QUAL_CONST);
- }
-}
-
-/* Given a pointer to an object with at least one virtual table
- pointer somewhere, return a pointer to a possible sub-object that
- has a virtual table pointer in it that is the vtable parent for
- that sub-object. */
-
-static tree
-build_headof_sub (exp)
- tree exp;
-{
- tree type = TREE_TYPE (TREE_TYPE (exp));
- tree basetype = CLASSTYPE_RTTI (type);
- tree binfo = get_binfo (basetype, type, 0);
-
- exp = convert_pointer_to_real (binfo, exp);
- return exp;
+ pop_namespace ();
+ tinfo_decl_type =
+ build_qualified_type (type_info_type_node, TYPE_QUAL_CONST);
}
/* Given the expression EXP of type `class *', return the head of the
tree exp;
{
tree type = TREE_TYPE (exp);
- tree aref;
tree offset;
tree index;
if (!TYPE_POLYMORPHIC_P (type))
return exp;
- if (CLASSTYPE_COM_INTERFACE (type))
- {
- cp_error ("RTTI not supported for COM interface type `%T'", type);
- return error_mark_node;
- }
-
- /* If we don't have rtti stuff, get to a sub-object that does. */
- if (!CLASSTYPE_VFIELDS (TREE_TYPE (TREE_TYPE (exp))))
- exp = build_headof_sub (exp);
/* We use this a couple of times below, protect it. */
exp = save_expr (exp);
- /* Under the new ABI, the offset-to-top field is at index -2 from
- the vptr. */
- if (new_abi_rtti_p ())
- index = build_int_2 (-2, -1);
- /* But under the old ABI, it is at offset zero. */
- else
- index = integer_zero_node;
-
- aref = build_vtbl_ref (build_indirect_ref (exp, NULL_PTR), index);
+ /* The offset-to-top field is at index -2 from the vptr. */
+ index = build_int_2 (-2, -1);
- if (flag_vtable_thunks)
- offset = aref;
- else
- offset = build_component_ref (aref, delta_identifier, NULL_TREE, 0);
+ offset = build_vtbl_ref (build_indirect_ref (exp, NULL), index);
type = build_qualified_type (ptr_type_node,
- CP_TYPE_QUALS (TREE_TYPE (exp)));
+ cp_type_quals (TREE_TYPE (exp)));
return build (PLUS_EXPR, type, exp,
cp_convert (ptrdiff_type_node, offset));
}
static tree
throw_bad_cast ()
{
- tree fn = get_identifier ("__throw_bad_cast");
+ tree fn = get_identifier ("__cxa_bad_cast");
if (IDENTIFIER_GLOBAL_VALUE (fn))
fn = IDENTIFIER_GLOBAL_VALUE (fn);
else
static tree
throw_bad_typeid ()
{
- tree fn = get_identifier ("__throw_bad_typeid");
+ tree fn = get_identifier ("__cxa_bad_typeid");
if (IDENTIFIER_GLOBAL_VALUE (fn))
fn = IDENTIFIER_GLOBAL_VALUE (fn);
else
tree t;
tree index;
- if (! flag_rtti)
- error ("taking dynamic typeid of object with -fno-rtti");
- if (CLASSTYPE_COM_INTERFACE (type))
- {
- cp_error ("RTTI not supported for COM interface type `%T'", type);
- return error_mark_node;
- }
-
- /* If we don't have rtti stuff, get to a sub-object that does. */
- if (! CLASSTYPE_VFIELDS (type))
- {
- exp = build_unary_op (ADDR_EXPR, exp, 0);
- exp = build_headof_sub (exp);
- exp = build_indirect_ref (exp, NULL_PTR);
- }
-
- /* The RTTI information is always in the vtable, but it's at
- different indices depending on the ABI. */
- if (new_abi_rtti_p ())
- index = minus_one_node;
- else if (flag_vtable_thunks)
- index = integer_one_node;
- else
- index = integer_zero_node;
- t = build_vfn_ref ((tree *) 0, exp, index);
+ /* The RTTI information is at index -1. */
+ index = integer_minus_one_node;
+ t = build_vtbl_ref (exp, index);
TREE_TYPE (t) = build_pointer_type (tinfo_decl_type);
return t;
}
return build_unary_op (ADDR_EXPR, exp, 0);
}
-tree
-build_typeid (exp)
- tree exp;
+static bool
+typeid_ok_p ()
{
- tree cond = NULL_TREE;
- int nonnull = 0;
-
if (! flag_rtti)
{
error ("cannot use typeid with -fno-rtti");
- return error_mark_node;
+ return false;
}
if (!COMPLETE_TYPE_P (type_info_type_node))
{
error ("must #include <typeinfo> before using typeid");
- return error_mark_node;
+ return false;
}
+ return true;
+}
+
+tree
+build_typeid (exp)
+ tree exp;
+{
+ tree cond = NULL_TREE;
+ int nonnull = 0;
+
+ if (exp == error_mark_node || !typeid_ok_p ())
+ return error_mark_node;
+
if (processing_template_decl)
return build_min_nt (TYPEID_EXPR, exp);
if (exp == error_mark_node)
return error_mark_node;
- exp = tinfo_from_decl (exp);
+ exp = build_indirect_ref (exp, NULL);
if (cond)
{
return convert_from_reference (exp);
}
-static tree
-get_tinfo_var (type)
- tree type;
-{
- tree tname = build_overload_with_type (tinfo_var_id, type);
- tree arrtype;
- int size;
-
- my_friendly_assert (!new_abi_rtti_p (), 20000118);
- if (IDENTIFIER_GLOBAL_VALUE (tname))
- return IDENTIFIER_GLOBAL_VALUE (tname);
-
- /* Figure out how much space we need to allocate for the type_info object.
- If our struct layout or the type_info classes are changed, this will
- need to be modified. */
- if (TYPE_QUALS (type) != TYPE_UNQUALIFIED)
- size = 3 * POINTER_SIZE + INT_TYPE_SIZE;
- else if (TREE_CODE (type) == POINTER_TYPE
- && ! (TREE_CODE (TREE_TYPE (type)) == OFFSET_TYPE
- || TREE_CODE (TREE_TYPE (type)) == METHOD_TYPE))
- size = 3 * POINTER_SIZE;
- else if (IS_AGGR_TYPE (type))
- {
- if (CLASSTYPE_N_BASECLASSES (type) == 0)
- size = 2 * POINTER_SIZE;
- else if (! TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (type)
- && (TREE_VIA_PUBLIC
- (TREE_VEC_ELT (TYPE_BINFO_BASETYPES (type), 0))))
- size = 3 * POINTER_SIZE;
- else
- size = 3 * POINTER_SIZE + TYPE_PRECISION (sizetype);
- }
- else
- size = 2 * POINTER_SIZE;
-
- /* The type for a character array of the appropriate size. */
- arrtype = build_cplus_array_type
- (unsigned_char_type_node,
- build_index_type (size_int (size / BITS_PER_UNIT - 1)));
-
- return declare_global_var (tname, arrtype);
-}
-
/* Generate the NTBS name of a type. */
static tree
tinfo_name (type)
const char *name;
tree name_string;
- if (flag_new_abi)
- name = mangle_type_string (type);
- else
- name = build_overload_name (type, 1, 1);
+ name = mangle_type_string (type);
name_string = combine_strings (build_string (strlen (name) + 1, name));
return name_string;
}
-/* Returns a decl for a function or variable which can be used to obtain a
- type_info object for TYPE. The old-abi uses functions, the new-abi
- uses the type_info object directly. You can take the address of the
- returned decl, to save the decl. To use the decl call
- tinfo_from_decl. You must arrange that the decl is mark_used, if
- actually use it --- decls in vtables are only used if the vtable is
- output. */
+/* Returns a decl for the type_info variable for TYPE. You must
+ arrange that the decl is mark_used, if actually use it --- decls in
+ vtables are only used if the vtable is output. */
tree
get_tinfo_decl (type)
tree name;
tree d;
+ if (COMPLETE_TYPE_P (type)
+ && TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
+ {
+ cp_error ("cannot create type information for type `%T' because its size is variable",
+ type);
+ return error_mark_node;
+ }
+
if (TREE_CODE (type) == OFFSET_TYPE)
type = TREE_TYPE (type);
if (TREE_CODE (type) == METHOD_TYPE)
type = build_function_type (TREE_TYPE (type),
TREE_CHAIN (TYPE_ARG_TYPES (type)));
- if (flag_new_abi)
- name = mangle_typeinfo_for_type (type);
- else
- name = build_overload_with_type (tinfo_decl_id, type);
+ name = mangle_typeinfo_for_type (type);
d = IDENTIFIER_GLOBAL_VALUE (name);
if (d)
/* OK */;
- else if (!new_abi_rtti_p ())
- {
- /* The tinfo decl is a function returning a reference to the
- type_info object. */
- d = push_library_fn (name, tinfo_decl_type);
- DECL_NOT_REALLY_EXTERN (d) = 1;
- SET_DECL_TINFO_FN_P (d);
- TREE_TYPE (name) = type;
- defer_fn (d);
- }
else
{
/* The tinfo decl is the type_info object itself. We make all
tinfo objects look as type_info, even though they will end up
- being a subclass of that when emitted. This means the we'll
+ being a subclass of that when emitted. This means that we'll
erroneously think we know the dynamic type -- be careful in the
runtime. */
d = build_lang_decl (VAR_DECL, name, tinfo_decl_type);
TREE_STATIC (d) = 1;
DECL_EXTERNAL (d) = 1;
TREE_PUBLIC (d) = 1;
- comdat_linkage (d);
- DECL_ASSEMBLER_NAME (d) = DECL_NAME (d);
+ if (flag_weak || !typeinfo_in_lib_p (type))
+ comdat_linkage (d);
+ SET_DECL_ASSEMBLER_NAME (d, name);
cp_finish_decl (d, NULL_TREE, NULL_TREE, 0);
pushdecl_top_level (d);
return d;
}
-/* Given an expr produced by get_tinfo_decl, return an expr which
- produces a reference to the type_info object. */
-
-static tree
-tinfo_from_decl (expr)
- tree expr;
-{
- tree t;
-
- if (!new_abi_rtti_p ())
- t = build_call (expr, NULL_TREE);
- else if (TREE_CODE (TREE_TYPE (expr)) == POINTER_TYPE)
- t = build_indirect_ref (expr, NULL);
- else
- t = expr;
-
- return t;
-}
-
-tree
-get_typeid_1 (type)
- tree type;
-{
- tree t;
-
- t = get_tinfo_decl (type);
- t = tinfo_from_decl (t);
- return convert_from_reference (t);
-}
-
/* Return the type_info object for TYPE. */
tree
get_typeid (type)
tree type;
{
- if (type == error_mark_node)
+ if (type == error_mark_node || !typeid_ok_p ())
return error_mark_node;
-
- if (!COMPLETE_TYPE_P (type_info_type_node))
- {
- error ("must #include <typeinfo> before using typeid");
- return error_mark_node;
- }
if (processing_template_decl)
return build_min_nt (TYPEID_EXPR, type);
if (!type)
return error_mark_node;
- return get_typeid_1 (type);
+ return get_tinfo_decl (type);
}
/* Check whether TEST is null before returning RESULT. If TEST is used in
result);
}
-/* Generate the constant expression describing where direct base BINFO
- appears within the PARENT. How to interpret this expression depends on
- details of the ABI, which the runtime must be aware of. */
-
-static tree
-get_base_offset (binfo, parent)
- tree binfo;
- tree parent;
-{
- if (! TREE_VIA_VIRTUAL (binfo))
- return BINFO_OFFSET (binfo);
- else if (! vbase_offsets_in_vtable_p ())
- {
- const char *name;
- tree result;
- tree field;
-
- FORMAT_VBASE_NAME (name, BINFO_TYPE (binfo));
- field = lookup_field (parent, get_identifier (name), 0, 0);
- result = byte_position (field);
-
- if (DECL_CONTEXT (field) != parent)
- {
- /* The vbase pointer might be in a non-virtual base of PARENT.
- * Adjust for the offset of that base in PARENT. */
- tree path;
-
- get_base_distance (DECL_CONTEXT (field), parent, -1, &path);
- result = build (PLUS_EXPR, TREE_TYPE (result),
- result, BINFO_OFFSET (path));
- result = fold (result);
- }
- return result;
- }
- else
- /* Under the new ABI, we store the vtable offset at which
- the virtual base offset can be found. */
- return convert (sizetype,
- BINFO_VPTR_FIELD (binfo_for_vbase (BINFO_TYPE (binfo),
- parent)));
-
-}
-
/* Execute a dynamic cast, as described in section 5.2.6 of the 9/93 working
paper. */
/* If *type is an unambiguous accessible base class of *exprtype,
convert statically. */
{
- int distance;
- tree path;
+ tree binfo;
- distance = get_base_distance (TREE_TYPE (type), TREE_TYPE (exprtype), 1,
- &path);
+ binfo = lookup_base (TREE_TYPE (exprtype), TREE_TYPE (type),
+ ba_not_special, NULL);
- if (distance == -2)
- {
- cp_error ("dynamic_cast from `%T' to ambiguous base class `%T'",
- TREE_TYPE (exprtype), TREE_TYPE (type));
- return error_mark_node;
- }
- if (distance == -3)
+ if (binfo)
{
- cp_error ("dynamic_cast from `%T' to private base class `%T'",
- TREE_TYPE (exprtype), TREE_TYPE (type));
- return error_mark_node;
- }
-
- if (distance >= 0)
- {
- expr = build_vbase_path (PLUS_EXPR, type, expr, path, 0);
+ expr = build_base_path (PLUS_EXPR, convert_from_reference (expr),
+ binfo, 0);
if (TREE_CODE (exprtype) == POINTER_TYPE)
expr = non_lvalue (expr);
return expr;
if (tc == REFERENCE_TYPE)
expr1 = build_unary_op (ADDR_EXPR, expr1, 0);
- if (!new_abi_rtti_p ())
- {
- tree expr2 = build_headof (expr1);
- tree td1 = expr;
-
- if (tc == POINTER_TYPE)
- td1 = build_indirect_ref (td1, NULL_PTR);
- td1 = get_tinfo_decl_dynamic (td1);
-
- elems = tree_cons
- (NULL_TREE, td1, tree_cons
- (NULL_TREE, td2, tree_cons
- (NULL_TREE, boff, tree_cons
- (NULL_TREE, expr2, tree_cons
- (NULL_TREE, td3, tree_cons
- (NULL_TREE, expr1, NULL_TREE))))));
- }
- else
- elems = tree_cons
- (NULL_TREE, expr1, tree_cons
- (NULL_TREE, td3, tree_cons
- (NULL_TREE, td2, tree_cons
- (NULL_TREE, boff, NULL_TREE))));
+ elems = tree_cons
+ (NULL_TREE, expr1, tree_cons
+ (NULL_TREE, td3, tree_cons
+ (NULL_TREE, td2, tree_cons
+ (NULL_TREE, boff, NULL_TREE))));
dcast_fn = dynamic_cast_node;
if (!dcast_fn)
{
tree tmp;
tree tinfo_ptr;
- tree ns = new_abi_rtti_p () ? abi_node : global_namespace;
+ tree ns = abi_node;
const char *name;
push_nested_namespace (ns);
- if (!new_abi_rtti_p ())
- {
- tinfo_ptr = build_pointer_type (tinfo_decl_type);
- name = "__dynamic_cast_2";
- tmp = tree_cons
- (NULL_TREE, tinfo_ptr, tree_cons
- (NULL_TREE, tinfo_ptr, tree_cons
- (NULL_TREE, integer_type_node, tree_cons
- (NULL_TREE, ptr_type_node, tree_cons
- (NULL_TREE, tinfo_ptr, tree_cons
- (NULL_TREE, ptr_type_node, void_list_node))))));
- }
- else
- {
- tinfo_ptr = xref_tag (class_type_node,
- get_identifier ("__class_type_info"),
- 1);
-
- tinfo_ptr = build_pointer_type
- (build_qualified_type
- (tinfo_ptr, TYPE_QUAL_CONST));
- name = "__dynamic_cast";
- tmp = tree_cons
- (NULL_TREE, const_ptr_type_node, tree_cons
- (NULL_TREE, tinfo_ptr, tree_cons
- (NULL_TREE, tinfo_ptr, tree_cons
- (NULL_TREE, ptrdiff_type_node, void_list_node))));
- }
+ tinfo_ptr = xref_tag (class_type_node,
+ get_identifier ("__class_type_info"),
+ 1);
+
+ tinfo_ptr = build_pointer_type
+ (build_qualified_type
+ (tinfo_ptr, TYPE_QUAL_CONST));
+ name = "__dynamic_cast";
+ tmp = tree_cons
+ (NULL_TREE, const_ptr_type_node, tree_cons
+ (NULL_TREE, tinfo_ptr, tree_cons
+ (NULL_TREE, tinfo_ptr, tree_cons
+ (NULL_TREE, ptrdiff_type_node, void_list_node))));
tmp = build_function_type (ptr_type_node, tmp);
- if (new_abi_rtti_p ())
- /* We want its name mangling. */
- dcast_fn = build_cp_library_fn_ptr (name, tmp);
- else
- dcast_fn = build_library_fn_ptr (name, tmp);
+ dcast_fn = build_library_fn_ptr (name, tmp);
pop_nested_namespace (ns);
dynamic_cast_node = dcast_fn;
}
return convert_from_reference (build_dynamic_cast_1 (type, expr));
}
\f
-/* Build and initialize various sorts of descriptors. Every descriptor
- node has a name associated with it (the name created by mangling).
- For this reason, we use the identifier as our access to the __*_desc
- nodes, instead of sticking them directly in the types. Otherwise we
- would burden all built-in types (and pointer types) with slots that
- we don't necessarily want to use.
-
- For each descriptor we build, we build a variable that contains
- the descriptor's information. When we need this info at runtime,
- all we need is access to these variables.
-
- Note: these constructors always return the address of the descriptor
- info, since that is simplest for their mutual interaction. */
-
-/* Build an initializer for a __si_type_info node. */
-
-static void
-expand_si_desc (tdecl, type)
- tree tdecl;
- tree type;
-{
- tree t, elems, fn;
- tree name_string = tinfo_name (type);
-
- type = BINFO_TYPE (TREE_VEC_ELT (TYPE_BINFO_BASETYPES (type), 0));
- finish_expr_stmt (get_typeid_1 (type));
- t = decay_conversion (get_tinfo_var (type));
- elems = tree_cons
- (NULL_TREE, decay_conversion (tdecl), tree_cons
- (NULL_TREE, decay_conversion (name_string), tree_cons
- (NULL_TREE, t, NULL_TREE)));
-
- fn = get_identifier ("__rtti_si");
- if (IDENTIFIER_GLOBAL_VALUE (fn))
- fn = IDENTIFIER_GLOBAL_VALUE (fn);
- else
- {
- tree tmp;
- tmp = tree_cons
- (NULL_TREE, ptr_type_node, tree_cons
- (NULL_TREE, const_string_type_node, tree_cons
- (NULL_TREE, build_pointer_type (type_info_type_node),
- void_list_node)));
- fn = push_void_library_fn (fn, tmp);
- }
-
- fn = build_call (fn, elems);
- finish_expr_stmt (fn);
-}
-
-/* Build an initializer for a __class_type_info node. */
-
-static void
-expand_class_desc (tdecl, type)
- tree tdecl;
- tree type;
-{
- tree name_string;
- tree fn, tmp;
-
- int i = CLASSTYPE_N_BASECLASSES (type);
- int base_cnt = 0;
- tree binfos = TYPE_BINFO_BASETYPES (type);
- tree base, elems, access, offset, isvir;
- tree elt, elts = NULL_TREE;
-
- if (base_desc_type_node == NULL_TREE)
- {
- tree fields [4];
-
- /* A reasonably close approximation of __class_type_info::base_info */
-
- base_desc_type_node = make_aggr_type (RECORD_TYPE);
-
- /* Actually const __user_type_info * */
- fields [0] = build_decl
- (FIELD_DECL, NULL_TREE,
- build_pointer_type (build_qualified_type
- (type_info_type_node,
- TYPE_QUAL_CONST)));
- fields [1] = build_decl
- (FIELD_DECL, NULL_TREE,
- flag_new_abi ? intSI_type_node : unsigned_intSI_type_node);
- DECL_BIT_FIELD (fields[1]) = 1;
- DECL_SIZE (fields[1]) = bitsize_int (29);
-
- fields [2] = build_decl (FIELD_DECL, NULL_TREE, boolean_type_node);
- DECL_BIT_FIELD (fields[2]) = 1;
- DECL_SIZE (fields[2]) = bitsize_one_node;
-
- /* Actually enum access */
- fields [3] = build_decl (FIELD_DECL, NULL_TREE, integer_type_node);
- DECL_BIT_FIELD (fields[3]) = 1;
- DECL_SIZE (fields[3]) = bitsize_int (2);
-
- finish_builtin_type (base_desc_type_node, "__base_info", fields,
- 3, ptr_type_node);
- }
-
- while (--i >= 0)
- {
- tree binfo = TREE_VEC_ELT (binfos, i);
-
- finish_expr_stmt (get_typeid_1 (BINFO_TYPE (binfo)));
- base = decay_conversion (get_tinfo_var (BINFO_TYPE (binfo)));
- offset = get_base_offset (binfo, type);
-
- if (TREE_VIA_PUBLIC (binfo))
- access = access_public_node;
- else if (TREE_VIA_PROTECTED (binfo))
- access = access_protected_node;
- else
- access = access_private_node;
- if (TREE_VIA_VIRTUAL (binfo))
- isvir = boolean_true_node;
- else
- isvir = boolean_false_node;
-
- elt = build
- (CONSTRUCTOR, base_desc_type_node, NULL_TREE, tree_cons
- (NULL_TREE, base, tree_cons
- (NULL_TREE, offset, tree_cons
- (NULL_TREE, isvir, tree_cons
- (NULL_TREE, access, NULL_TREE)))));
- TREE_HAS_CONSTRUCTOR (elt) = TREE_CONSTANT (elt) = TREE_STATIC (elt) = 1;
- elts = tree_cons (NULL_TREE, elt, elts);
- base_cnt++;
- }
-
- name_string = tinfo_name (type);
-
- {
- tree arrtype = build_array_type (base_desc_type_node, NULL_TREE);
- elts = build (CONSTRUCTOR, arrtype, NULL_TREE, elts);
- TREE_HAS_CONSTRUCTOR (elts) = TREE_CONSTANT (elts)
- = TREE_STATIC (elts) = 1;
- complete_array_type (arrtype, elts, 1);
- }
-
- elems = tree_cons
- (NULL_TREE, decay_conversion (tdecl), tree_cons
- (NULL_TREE, decay_conversion (name_string), tree_cons
- (NULL_TREE, decay_conversion (elts), tree_cons
- (NULL_TREE, cp_convert (sizetype, build_int_2 (base_cnt, 0)),
- NULL_TREE))));
-
- fn = get_identifier ("__rtti_class");
- if (IDENTIFIER_GLOBAL_VALUE (fn))
- fn = IDENTIFIER_GLOBAL_VALUE (fn);
- else
- {
- tmp = tree_cons
- (NULL_TREE, ptr_type_node, tree_cons
- (NULL_TREE, const_string_type_node, tree_cons
- (NULL_TREE, build_pointer_type (base_desc_type_node), tree_cons
- (NULL_TREE, sizetype, void_list_node))));
-
- fn = push_void_library_fn (fn, tmp);
- }
-
- fn = build_call (fn, elems);
- finish_expr_stmt (fn);
-}
-
-/* Build an initializer for a __pointer_type_info node. */
-
-static void
-expand_ptr_desc (tdecl, type)
- tree tdecl;
- tree type;
-{
- tree t, elems, fn;
- tree name_string = tinfo_name (type);
-
- type = TREE_TYPE (type);
- finish_expr_stmt (get_typeid_1 (type));
- t = decay_conversion (get_tinfo_var (type));
- elems = tree_cons
- (NULL_TREE, decay_conversion (tdecl), tree_cons
- (NULL_TREE, decay_conversion (name_string), tree_cons
- (NULL_TREE, t, NULL_TREE)));
-
- fn = get_identifier ("__rtti_ptr");
- if (IDENTIFIER_GLOBAL_VALUE (fn))
- fn = IDENTIFIER_GLOBAL_VALUE (fn);
- else
- {
- tree tmp;
- tmp = tree_cons
- (NULL_TREE, ptr_type_node, tree_cons
- (NULL_TREE, const_string_type_node, tree_cons
- (NULL_TREE, build_pointer_type (type_info_type_node),
- void_list_node)));
- fn = push_void_library_fn (fn, tmp);
- }
-
- fn = build_call (fn, elems);
- finish_expr_stmt (fn);
-}
-
-/* Build an initializer for a __attr_type_info node. */
-
-static void
-expand_attr_desc (tdecl, type)
- tree tdecl;
- tree type;
-{
- tree elems, t, fn;
- tree name_string = tinfo_name (type);
- tree attrval = build_int_2 (TYPE_QUALS (type), 0);
-
- finish_expr_stmt (get_typeid_1 (TYPE_MAIN_VARIANT (type)));
- t = decay_conversion (get_tinfo_var (TYPE_MAIN_VARIANT (type)));
- elems = tree_cons
- (NULL_TREE, decay_conversion (tdecl), tree_cons
- (NULL_TREE, decay_conversion (name_string), tree_cons
- (NULL_TREE, attrval, tree_cons (NULL_TREE, t, NULL_TREE))));
-
- fn = get_identifier ("__rtti_attr");
- if (IDENTIFIER_GLOBAL_VALUE (fn))
- fn = IDENTIFIER_GLOBAL_VALUE (fn);
- else
- {
- tree tmp;
- tmp = tree_cons
- (NULL_TREE, ptr_type_node, tree_cons
- (NULL_TREE, const_string_type_node, tree_cons
- (NULL_TREE, integer_type_node, tree_cons
- (NULL_TREE, build_pointer_type (type_info_type_node),
- void_list_node))));
- fn = push_void_library_fn (fn, tmp);
- }
-
- fn = build_call (fn, elems);
- finish_expr_stmt (fn);
-}
-
-/* Build an initializer for a type_info node that just has a name. */
-
-static void
-expand_generic_desc (tdecl, type, fnname)
- tree tdecl;
- tree type;
- const char *fnname;
-{
- tree name_string = tinfo_name (type);
- tree elems = tree_cons
- (NULL_TREE, decay_conversion (tdecl), tree_cons
- (NULL_TREE, decay_conversion (name_string), NULL_TREE));
-
- tree fn = get_identifier (fnname);
- if (IDENTIFIER_GLOBAL_VALUE (fn))
- fn = IDENTIFIER_GLOBAL_VALUE (fn);
- else
- {
- tree tmp;
- tmp = tree_cons
- (NULL_TREE, ptr_type_node, tree_cons
- (NULL_TREE, const_string_type_node, void_list_node));
- fn = push_void_library_fn (fn, tmp);
- }
-
- fn = build_call (fn, elems);
- finish_expr_stmt (fn);
-}
-
-/* Generate the code for a type_info initialization function.
- Note that we take advantage of the passage
-
- 5.2.7 Type identification [expr.typeid]
-
- Whether or not the destructor is called for the type_info object at the
- end of the program is unspecified.
-
- and don't bother to arrange for these objects to be destroyed. It
- doesn't matter, anyway, since the destructors don't do anything.
-
- This must only be called from toplevel (i.e. from finish_file)! */
-
-void
-synthesize_tinfo_fn (fndecl)
- tree fndecl;
-{
- tree type = TREE_TYPE (DECL_NAME (fndecl));
- tree tmp, addr, tdecl;
- tree compound_stmt;
- tree if_stmt;
- tree then_clause;
-
- my_friendly_assert (!new_abi_rtti_p (), 20000118);
- if (at_eof)
- {
- import_export_decl (fndecl);
- if (DECL_REALLY_EXTERN (fndecl))
- return;
- }
-
- /* Declare the static typeinfo variable. */
- tdecl = get_tinfo_var (type);
- DECL_EXTERNAL (tdecl) = 0;
- TREE_STATIC (tdecl) = 1;
- DECL_COMMON (tdecl) = 1;
- TREE_USED (tdecl) = 1;
- DECL_ALIGN (tdecl) = TYPE_ALIGN (ptr_type_node);
- DECL_USER_ALIGN (tdecl) = 0;
- cp_finish_decl (tdecl, NULL_TREE, NULL_TREE, 0);
-
- /* Begin processing the function. */
- start_function (NULL_TREE, fndecl, NULL_TREE,
- SF_DEFAULT | SF_PRE_PARSED);
- DECL_DEFER_OUTPUT (fndecl) = 1;
- store_parm_decls ();
- clear_last_expr ();
-
- /* Begin the body of the function. */
- compound_stmt = begin_compound_stmt (/*has_no_scope=*/0);
-
- /* For convenience, we save away the address of the static
- variable. */
- addr = decay_conversion (tdecl);
-
- /* If the first word of the array (the vtable) is non-zero, we've already
- initialized the object, so don't do it again. */
- if_stmt = begin_if_stmt ();
- tmp = cp_convert (build_pointer_type (ptr_type_node), addr);
- tmp = build_indirect_ref (tmp, 0);
- tmp = cp_build_binary_op (EQ_EXPR, tmp, integer_zero_node);
- finish_if_stmt_cond (tmp, if_stmt);
- then_clause = begin_compound_stmt (/*has_no_scope=*/0);
-
- if (TREE_CODE (type) == FUNCTION_TYPE)
- expand_generic_desc (tdecl, type, "__rtti_func");
- else if (TREE_CODE (type) == ARRAY_TYPE)
- expand_generic_desc (tdecl, type, "__rtti_array");
- else if (TYPE_QUALS (type) != TYPE_UNQUALIFIED)
- expand_attr_desc (tdecl, type);
- else if (TREE_CODE (type) == POINTER_TYPE)
- {
- if (TREE_CODE (TREE_TYPE (type)) == OFFSET_TYPE)
- expand_generic_desc (tdecl, type, "__rtti_ptmd");
- else if (TREE_CODE (TREE_TYPE (type)) == METHOD_TYPE)
- expand_generic_desc (tdecl, type, "__rtti_ptmf");
- else
- expand_ptr_desc (tdecl, type);
- }
- else if (TYPE_PTRMEMFUNC_P (type))
- expand_generic_desc (tdecl, type, "__rtti_ptmf");
- else if (IS_AGGR_TYPE (type))
- {
- if (CLASSTYPE_N_BASECLASSES (type) == 0)
- expand_generic_desc (tdecl, type, "__rtti_user");
- else if (! TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (type)
- && (TREE_VIA_PUBLIC
- (TREE_VEC_ELT (TYPE_BINFO_BASETYPES (type), 0))))
- expand_si_desc (tdecl, type);
- else
- expand_class_desc (tdecl, type);
- }
- else if (TREE_CODE (type) == ENUMERAL_TYPE)
- expand_generic_desc (tdecl, type, "__rtti_user");
- else
- my_friendly_abort (252);
-
- finish_compound_stmt (/*has_no_scope=*/0, then_clause);
- finish_then_clause (if_stmt);
- finish_if_stmt ();
-
- /* OK, now return the type_info object. */
- tmp = cp_convert (build_pointer_type (type_info_type_node), addr);
- tmp = build_indirect_ref (tmp, 0);
- finish_return_stmt (tmp);
- /* Finish the function body. */
- finish_compound_stmt (/*has_no_scope=*/0, compound_stmt);
- expand_body (finish_function (0));
-}
-
/* Return the runtime bit mask encoding the qualifiers of TYPE. */
static int
NULL_TREE);
tree name_string = tinfo_name (target);
- if (flag_new_abi)
- name_name = mangle_typeinfo_for_type (target);
- else
- name_name = build_overload_with_type (tinfo_var_id, target);
+ name_name = mangle_typeinfo_string_for_type (target);
name_decl = build_lang_decl (VAR_DECL, name_name, name_type);
DECL_ARTIFICIAL (name_decl) = 1;
DECL_EXTERNAL (name_decl) = 0;
TREE_PUBLIC (name_decl) = 1;
comdat_linkage (name_decl);
- if (flag_new_abi)
- /* The new ABI specifies the external name of the string
- containing the type's name. */
- DECL_ASSEMBLER_NAME (name_decl)
- = mangle_typeinfo_string_for_type (target);
- else
- DECL_ASSEMBLER_NAME (name_decl) = DECL_NAME (name_decl);
+ /* External name of the string containing the type's name has a
+ special name. */
+ SET_DECL_ASSEMBLER_NAME (name_decl,
+ mangle_typeinfo_string_for_type (target));
DECL_INITIAL (name_decl) = name_string;
cp_finish_decl (name_decl, name_string, NULL_TREE, 0);
+ pushdecl_top_level (name_decl);
}
if (TINFO_VTABLE_DECL (desc))
return init;
}
+/* Returns non-zero if the typeinfo for type should be placed in
+ the runtime library. */
+
+static int
+typeinfo_in_lib_p (type)
+ tree type;
+{
+ /* The typeinfo objects for `T*' and `const T*' are in the runtime
+ library for simple types T. */
+ if (TREE_CODE (type) == POINTER_TYPE
+ && (cp_type_quals (TREE_TYPE (type)) == TYPE_QUAL_CONST
+ || cp_type_quals (TREE_TYPE (type)) == TYPE_UNQUALIFIED))
+ type = TREE_TYPE (type);
+
+ switch (TREE_CODE (type))
+ {
+ case INTEGER_TYPE:
+ case BOOLEAN_TYPE:
+ case CHAR_TYPE:
+ case REAL_TYPE:
+ case VOID_TYPE:
+ return 1;
+
+ default:
+ return 0;
+ }
+}
+
/* Generate a pseudo_type_info VAR_DECL suitable for the supplied
TARGET_TYPE and given the REAL_NAME. This is the structure expected by
the runtime, and therefore has additional fields. If we need not emit a
tree var_type = NULL_TREE;
int non_public = 0;
- my_friendly_assert (new_abi_rtti_p (), 20000118);
-
switch (TREE_CODE (target_type))
{
case POINTER_TYPE:
}
else
{
- int code = TREE_CODE (TREE_TYPE (target_type));
-
- if ((CP_TYPE_QUALS (TREE_TYPE (target_type)) | TYPE_QUAL_CONST)
- == TYPE_QUAL_CONST
- && (code == INTEGER_TYPE || code == BOOLEAN_TYPE
- || code == CHAR_TYPE || code == REAL_TYPE
- || code == VOID_TYPE)
- && !doing_runtime)
+ if (typeinfo_in_lib_p (target_type) && !doing_runtime)
/* These are in the runtime. */
return NULL_TREE;
var_type = ptr_desc_type_node;
tree tinfo;
tree offset;
- if (TREE_VIA_VIRTUAL (base_binfo))
- flags |= 1;
if (TREE_PUBLIC (base_binfo))
flags |= 2;
tinfo = get_tinfo_decl (BINFO_TYPE (base_binfo));
tinfo = build_unary_op (ADDR_EXPR, tinfo, 0);
- offset = get_base_offset (base_binfo, target_type);
+ if (TREE_VIA_VIRTUAL (base_binfo))
+ {
+ /* We store the vtable offset at which the virtual
+ base offset can be found. */
+ offset = BINFO_VPTR_FIELD (binfo_for_vbase (BINFO_TYPE (base_binfo),
+ target_type));
+ offset = convert (sizetype, offset);
+ flags |= 1;
+ }
+ else
+ offset = BINFO_OFFSET (base_binfo);
/* is it a single public inheritance? */
if (is_simple && flags == 2 && integer_zerop (offset))
var_init = class_initializer (var_type, target_type, base_inits);
}
break;
- case INTEGER_TYPE:
- case BOOLEAN_TYPE:
- case CHAR_TYPE:
- case REAL_TYPE:
- case VOID_TYPE:
- if (!doing_runtime)
- /* These are guaranteed to be in the runtime. */
- return NULL_TREE;
- var_type = bltn_desc_type_node;
- var_init = generic_initializer (var_type, target_type);
- break;
+
default:
+ if (typeinfo_in_lib_p (target_type))
+ {
+ if (!doing_runtime)
+ /* These are guaranteed to be in the runtime. */
+ return NULL_TREE;
+ var_type = bltn_desc_type_node;
+ var_init = generic_initializer (var_type, target_type);
+ break;
+ }
my_friendly_abort (20000117);
}
-
- return create_real_tinfo_var (real_name, TINFO_PSEUDO_TYPE (var_type),
+ return create_real_tinfo_var (target_type,
+ real_name, TINFO_PSEUDO_TYPE (var_type),
var_init, non_public);
}
make this variable public (comdat). */
static tree
-create_real_tinfo_var (name, type, init, non_public)
+create_real_tinfo_var (target_type, name, type, init, non_public)
+ tree target_type;
tree name;
tree type;
tree init;
tree decl;
tree hidden_name;
char hidden[30];
-
- sprintf (hidden, "%.*s_%d",
- IDENTIFIER_LENGTH (tinfo_decl_id), IDENTIFIER_POINTER (tinfo_decl_id),
- count++);
+
+ /* We cannot give this the name NAME, as that already is globally
+ bound to the tinfo_decl we originally created for this type in
+ get_tinfo_decl. */
+ sprintf (hidden, "__ti_%d", count++);
hidden_name = get_identifier (hidden);
decl = build_lang_decl (VAR_DECL, hidden_name,
if (!non_public)
{
TREE_PUBLIC (decl) = 1;
- comdat_linkage (decl);
+ if (flag_weak || !typeinfo_in_lib_p (target_type))
+ comdat_linkage (decl);
}
- DECL_ASSEMBLER_NAME (decl) = name;
+ SET_DECL_ASSEMBLER_NAME (decl, name);
DECL_INITIAL (decl) = init;
cp_finish_decl (decl, init, NULL_TREE, 0);
pushdecl_top_level (decl);
static tree
create_pseudo_type_info VPARAMS((const char *real_name, int ident, ...))
{
-#ifndef ANSI_PROTOTYPES
- char const *real_name;
- int ident;
-#endif
- va_list ap;
tree real_type, pseudo_type;
char *pseudo_name;
tree vtable_decl;
tree fields[10];
tree field_decl;
tree result;
-
- VA_START (ap, ident);
-#ifndef ANSI_PROTOTYPES
- real_name = va_arg (ap, char const *);
- ident = va_arg (app, int);
-#endif
+
+ VA_OPEN (ap, ident);
+ VA_FIXEDARG (ap, const char *, real_name);
+ VA_FIXEDARG (ap, int, ident);
/* Generate the pseudo type name. */
pseudo_name = (char *)alloca (strlen (real_name) + 30);
/* Get the vtable decl. */
real_type = xref_tag (class_type_node, get_identifier (real_name), 1);
+ if (! TYPE_SIZE (real_type))
+ {
+ /* We never saw a definition of this type, so we need to tell the
+ compiler that this is an exported class, as indeed all of the
+ __*_type_info classes are. */
+ SET_CLASSTYPE_INTERFACE_KNOWN (real_type);
+ CLASSTYPE_INTERFACE_ONLY (real_type) = 1;
+ }
+
vtable_decl = get_vtable_decl (real_type, /*complete=*/1);
vtable_decl = build_unary_op (ADDR_EXPR, vtable_decl, 0);
- /* Under the new ABI, we need to point into the middle of the
- vtable. */
- if (flag_new_abi)
- {
- vtable_decl = build (PLUS_EXPR,
- TREE_TYPE (vtable_decl),
- vtable_decl,
- size_binop (MULT_EXPR,
- size_int (2),
- TYPE_SIZE_UNIT (vtable_entry_type)));
- TREE_CONSTANT (vtable_decl) = 1;
- }
+ /* We need to point into the middle of the vtable. */
+ vtable_decl = build (PLUS_EXPR,
+ TREE_TYPE (vtable_decl),
+ vtable_decl,
+ size_binop (MULT_EXPR,
+ size_int (2),
+ TYPE_SIZE_UNIT (vtable_entry_type)));
+ TREE_CONSTANT (vtable_decl) = 1;
/* First field is the pseudo type_info base class. */
fields[0] = build_decl (FIELD_DECL, NULL_TREE, ti_desc_type_node);
pseudo_type = make_aggr_type (RECORD_TYPE);
finish_builtin_type (pseudo_type, pseudo_name, fields, ix, ptr_type_node);
TYPE_HAS_CONSTRUCTOR (pseudo_type) = 1;
- va_end (ap);
-
+
result = tree_cons (NULL_TREE, NULL_TREE, NULL_TREE);
TINFO_VTABLE_DECL (result) = vtable_decl;
TINFO_PSEUDO_TYPE (result) = pseudo_type;
+ VA_CLOSE (ap);
return result;
}
return desc;
/* Add number of bases and trailing array of base_class_type_info. */
- array_domain = build_index_type (build_int_2 (num_bases, 0));
+ array_domain = build_index_type (size_int (num_bases));
base_array = build_array_type (base_desc_type_node, array_domain);
push_nested_namespace (abi_node);
/* Emit the type_info descriptors which are guaranteed to be in the runtime
support. Generating them here guarantees consistency with the other
structures. We use the following heuristic to determine when the runtime
- is being generated. If std::__fundamental_type_info is defined, and it's
+ is being generated. If std::__fundamental_type_info is defined, and its
destructor is defined, then the runtime is being built. */
void
&void_type_node,
&boolean_type_node,
&wchar_type_node,
-#if 0
- &signed_wchar_type_node, &unsigned_wchar_type_node,
-#endif
&char_type_node, &signed_char_type_node, &unsigned_char_type_node,
&short_integer_type_node, &short_unsigned_type_node,
&integer_type_node, &unsigned_type_node,
&long_integer_type_node, &long_unsigned_type_node,
&long_long_integer_type_node, &long_long_unsigned_type_node,
&float_type_node, &double_type_node, &long_double_type_node,
-
- /* GCC extension types */
-#if 0
- &complex_integer_type_node,
- &complex_float_type_node, &complex_double_type_node,
- &complex_long_double_type_node,
-#endif
-
0
};
int ix;
projects / gcc.git / blobdiff