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libcp1plugin.cc
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/* Library interface to C++ front end.
Copyright (C) 2014-2021 Free Software Foundation, Inc.
This file is part of GCC. As it interacts with GDB through libcc1,
they all become a single program as regards the GNU GPL's requirements.
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 3, 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 COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include <cc1plugin-config.h>
#undef PACKAGE_NAME
#undef PACKAGE_STRING
#undef PACKAGE_TARNAME
#undef PACKAGE_VERSION
#include "../gcc/config.h"
#undef PACKAGE_NAME
#undef PACKAGE_STRING
#undef PACKAGE_TARNAME
#undef PACKAGE_VERSION
#include "gcc-plugin.h"
#include "system.h"
#include "coretypes.h"
#include "stringpool.h"
#include "gcc-interface.h"
#include "machmode.h"
#include "vec.h"
#include "double-int.h"
#include "input.h"
#include "alias.h"
#include "symtab.h"
#include "options.h"
#include "wide-int.h"
#include "inchash.h"
#include "tree.h"
#include "fold-const.h"
#include "stor-layout.h"
#include "cp-tree.h"
#include "toplev.h"
#include "timevar.h"
#include "hash-table.h"
#include "tm.h"
#include "c-family/c-pragma.h"
// #include "c-lang.h"
#include "diagnostic.h"
#include "langhooks.h"
#include "langhooks-def.h"
#include "decl.h"
#include "function.h"
#undef cfun // we want to assign to it, and function.h won't let us
#include "callbacks.hh"
#include "connection.hh"
#include "marshall-cp.hh"
#include "rpc.hh"
#include "context.hh"
#include <vector>
using namespace cc1_plugin;
static_assert (GCC_CP_SYMBOL_MASK >= GCC_CP_SYMBOL_END,
"GCC_CP_SYMBOL_MASK >= GCC_CP_SYMBOL_END");
static void
plugin_binding_oracle (enum cp_oracle_request kind, tree identifier)
{
enum gcc_cp_oracle_request request;
gcc_assert (current_context != NULL);
switch (kind)
{
case CP_ORACLE_IDENTIFIER:
request = GCC_CP_ORACLE_IDENTIFIER;
break;
default:
abort ();
}
int ignore;
cc1_plugin::call (current_context, "binding_oracle", &ignore,
request, IDENTIFIER_POINTER (identifier));
}
static int push_count;
/* at_function_scope_p () tests cfun, indicating we're actually
compiling the function, but we don't even set it when pretending to
enter a function scope. We use this distinction to tell these two
cases apart: we don't want to define e.g. class names in the user
expression function's scope, when they're local to the original
function, because they'd get the wrong linkage name. */
static bool
at_fake_function_scope_p ()
{
return (!cfun || cfun->decl != current_function_decl)
&& current_scope () == current_function_decl;
}
static void
push_fake_function (tree fndecl, scope_kind kind = sk_function_parms)
{
current_function_decl = fndecl;
begin_scope (kind, fndecl);
++function_depth;
begin_scope (sk_block, NULL);
}
static void
pop_scope ()
{
if (toplevel_bindings_p () && current_namespace == global_namespace)
pop_from_top_level ();
else if (at_namespace_scope_p ())
pop_namespace ();
else if (at_class_scope_p ())
popclass ();
else
{
gcc_assert (at_fake_function_scope_p ());
gcc_assert (!at_function_scope_p ());
gcc_assert (current_binding_level->kind == sk_block
&& current_binding_level->this_entity == NULL);
leave_scope ();
--function_depth;
gcc_assert (current_binding_level->this_entity
== current_function_decl);
leave_scope ();
current_function_decl = NULL;
for (cp_binding_level *scope = current_binding_level;
scope; scope = scope->level_chain)
if (scope->kind == sk_function_parms)
{
current_function_decl = scope->this_entity;
break;
}
}
}
static void
supplement_binding (cxx_binding *binding, tree decl)
{
/* FIXME: this is pretty much a copy of supplement_binding_1 in
../gcc/cp/name-lookup.c; the few replaced/removed bits are marked
with "// _1:". */
tree bval = binding->value;
bool ok = true;
tree target_bval = strip_using_decl (bval);
tree target_decl = strip_using_decl (decl);
if (TREE_CODE (target_decl) == TYPE_DECL && DECL_ARTIFICIAL (target_decl)
&& target_decl != target_bval
&& (TREE_CODE (target_bval) != TYPE_DECL
/* We allow pushing an enum multiple times in a class
template in order to handle late matching of underlying
type on an opaque-enum-declaration followed by an
enum-specifier. */
|| (processing_template_decl
&& TREE_CODE (TREE_TYPE (target_decl)) == ENUMERAL_TYPE
&& TREE_CODE (TREE_TYPE (target_bval)) == ENUMERAL_TYPE
&& (dependent_type_p (ENUM_UNDERLYING_TYPE
(TREE_TYPE (target_decl)))
|| dependent_type_p (ENUM_UNDERLYING_TYPE
(TREE_TYPE (target_bval)))))))
/* The new name is the type name. */
binding->type = decl;
else if (/* TARGET_BVAL is null when push_class_level_binding moves
an inherited type-binding out of the way to make room
for a new value binding. */
!target_bval
/* TARGET_BVAL is error_mark_node when TARGET_DECL's name
has been used in a non-class scope prior declaration.
In that case, we should have already issued a
diagnostic; for graceful error recovery purpose, pretend
this was the intended declaration for that name. */
|| target_bval == error_mark_node
/* If TARGET_BVAL is anticipated but has not yet been
declared, pretend it is not there at all. */
|| (TREE_CODE (target_bval) == FUNCTION_DECL
&& DECL_IS_UNDECLARED_BUILTIN (target_bval)))
binding->value = decl;
else if (TREE_CODE (target_bval) == TYPE_DECL
&& DECL_ARTIFICIAL (target_bval)
&& target_decl != target_bval
&& (TREE_CODE (target_decl) != TYPE_DECL
|| same_type_p (TREE_TYPE (target_decl),
TREE_TYPE (target_bval))))
{
/* The old binding was a type name. It was placed in
VALUE field because it was thought, at the point it was
declared, to be the only entity with such a name. Move the
type name into the type slot; it is now hidden by the new
binding. */
binding->type = bval;
binding->value = decl;
binding->value_is_inherited = false;
}
else if (TREE_CODE (target_bval) == TYPE_DECL
&& TREE_CODE (target_decl) == TYPE_DECL
&& DECL_NAME (target_decl) == DECL_NAME (target_bval)
&& binding->scope->kind != sk_class
&& (same_type_p (TREE_TYPE (target_decl), TREE_TYPE (target_bval))
/* If either type involves template parameters, we must
wait until instantiation. */
|| uses_template_parms (TREE_TYPE (target_decl))
|| uses_template_parms (TREE_TYPE (target_bval))))
/* We have two typedef-names, both naming the same type to have
the same name. In general, this is OK because of:
[dcl.typedef]
In a given scope, a typedef specifier can be used to redefine
the name of any type declared in that scope to refer to the
type to which it already refers.
However, in class scopes, this rule does not apply due to the
stricter language in [class.mem] prohibiting redeclarations of
members. */
ok = false;
/* There can be two block-scope declarations of the same variable,
so long as they are `extern' declarations. However, there cannot
be two declarations of the same static data member:
[class.mem]
A member shall not be declared twice in the
member-specification. */
else if (VAR_P (target_decl)
&& VAR_P (target_bval)
&& DECL_EXTERNAL (target_decl) && DECL_EXTERNAL (target_bval)
&& !DECL_CLASS_SCOPE_P (target_decl))
{
duplicate_decls (decl, binding->value);
ok = false;
}
else if (TREE_CODE (decl) == NAMESPACE_DECL
&& TREE_CODE (bval) == NAMESPACE_DECL
&& DECL_NAMESPACE_ALIAS (decl)
&& DECL_NAMESPACE_ALIAS (bval)
&& ORIGINAL_NAMESPACE (bval) == ORIGINAL_NAMESPACE (decl))
/* [namespace.alias]
In a declarative region, a namespace-alias-definition can be
used to redefine a namespace-alias declared in that declarative
region to refer only to the namespace to which it already
refers. */
ok = false;
else
{
// _1: diagnose_name_conflict (decl, bval);
ok = false;
}
gcc_assert (ok); // _1: return ok;
}
static void
reactivate_decl (tree decl, cp_binding_level *b)
{
bool in_function_p = TREE_CODE (b->this_entity) == FUNCTION_DECL;
gcc_assert (in_function_p
|| (b == current_binding_level
&& !at_class_scope_p ()));
tree id = DECL_NAME (decl);
tree type = NULL_TREE;
if (TREE_CODE (decl) == TYPE_DECL)
type = TREE_TYPE (decl);
if (type && TYPE_NAME (type) == decl
&& (RECORD_OR_UNION_CODE_P (TREE_CODE (type))
|| TREE_CODE (type) == ENUMERAL_TYPE))
{
gcc_assert (in_function_p && DECL_CONTEXT (decl) == b->this_entity);
type = TREE_TYPE (decl);
}
else
{
gcc_assert (DECL_CONTEXT (decl) == b->this_entity
|| DECL_CONTEXT (decl) == global_namespace
|| TREE_CODE (DECL_CONTEXT (decl)) == FUNCTION_DECL);
type = NULL_TREE;
}
/* Adjust IDENTIFIER_BINDING to what it would have been if we were
at binding level B. Save the binding chain up to that point in
[binding, *chainp), and take note of the outermost bindings found
before B. */
cxx_binding *binding = IDENTIFIER_BINDING (id), **chainp = NULL;
tree *shadowing_type_p = NULL;
if (binding)
{
cp_binding_level *bc = current_binding_level;
for (cxx_binding *prev_binding = binding;
prev_binding; prev_binding = prev_binding->previous)
{
while (bc != b && bc != prev_binding->scope)
bc = bc->level_chain;
if (bc == b)
{
if (!chainp)
binding = NULL;
break;
}
chainp = &prev_binding->previous;
if (type)
for (tree tshadow = prev_binding->scope->type_shadowed;
tshadow; tshadow = TREE_CHAIN (tshadow))
if (TREE_PURPOSE (tshadow) == id)
{
shadowing_type_p = &TREE_VALUE (tshadow);
break;
}
}
}
if (chainp)
{
IDENTIFIER_BINDING (id) = *chainp;
*chainp = NULL;
}
/* Like push_local_binding, supplement or add a binding to the
desired level. */
if (IDENTIFIER_BINDING (id) && IDENTIFIER_BINDING (id)->scope == b)
supplement_binding (IDENTIFIER_BINDING (id), decl);
else
push_binding (id, decl, b);
/* Now restore the binding chain we'd temporarily removed. */
if (chainp)
{
*chainp = IDENTIFIER_BINDING (id);
IDENTIFIER_BINDING (id) = binding;
if (type)
{
/* Insert the new type binding in the shadowing_type_p
TREE_VALUE chain. */
tree shadowed_type = NULL_TREE;
if (shadowing_type_p)
{
shadowed_type = *shadowing_type_p;
*shadowing_type_p = type;
}
b->type_shadowed = tree_cons (id, shadowed_type, b->type_shadowed);
TREE_TYPE (b->type_shadowed) = type;
}
}
else if (type)
{
/* Our new binding is the active one, so shadow the earlier
binding. */
b->type_shadowed = tree_cons (id, REAL_IDENTIFIER_TYPE_VALUE (id),
b->type_shadowed);
TREE_TYPE (b->type_shadowed) = type;
SET_IDENTIFIER_TYPE_VALUE (id, type);
}
/* Record that we have a binding for ID, like add_decl_to_level. */
tree node = build_tree_list (NULL_TREE, decl);
TREE_CHAIN (node) = b->names;
b->names = node;
}
static void
plugin_pragma_push_user_expression (cpp_reader *)
{
if (push_count++)
return;
gcc_assert (!current_class_ptr);
gcc_assert (!current_class_ref);
gcc_assert (!cp_binding_oracle);
cp_binding_oracle = plugin_binding_oracle;
/* Make the function containing the user expression a global
friend, so as to bypass access controls in it. */
if (at_function_scope_p ())
set_global_friend (current_function_decl);
gcc_assert (at_function_scope_p ());
function *save_cfun = cfun;
cp_binding_level *orig_binding_level = current_binding_level;
{
int success;
cc1_plugin::call (current_context, "enter_scope", &success);
}
gcc_assert (at_fake_function_scope_p () || at_function_scope_p ());
function *unchanged_cfun = cfun;
tree changed_func_decl = current_function_decl;
gcc_assert (current_class_type == DECL_CONTEXT (current_function_decl)
|| !(RECORD_OR_UNION_CODE_P
(TREE_CODE (DECL_CONTEXT (current_function_decl)))));
push_fake_function (save_cfun->decl, sk_block);
current_class_type = NULL_TREE;
if (unchanged_cfun)
{
/* If we get here, GDB did NOT change the context. */
gcc_assert (cfun == save_cfun);
gcc_assert (at_function_scope_p ());
gcc_assert (orig_binding_level
== current_binding_level->level_chain->level_chain);
}
else
{
cfun = save_cfun;
gcc_assert (at_function_scope_p ());
cp_binding_level *b = current_binding_level->level_chain;
gcc_assert (b->this_entity == cfun->decl);
/* Reactivate local names from the previous context. Use
IDENTIFIER_MARKED to avoid reactivating shadowed names. */
for (cp_binding_level *level = orig_binding_level;;)
{
for (tree name = level->names;
name; name = TREE_CHAIN (name))
{
tree decl = name;
if (TREE_CODE (decl) == TREE_LIST)
decl = TREE_VALUE (decl);
if (IDENTIFIER_MARKED (DECL_NAME (decl)))
continue;
IDENTIFIER_MARKED (DECL_NAME (decl)) = 1;
reactivate_decl (decl, b);
}
if (level->kind == sk_function_parms
&& level->this_entity == cfun->decl)
break;
gcc_assert (!level->this_entity);
level = level->level_chain;
}
/* Now, clear the markers. */
for (tree name = b->names; name; name = TREE_CHAIN (name))
{
tree decl = name;
if (TREE_CODE (decl) == TREE_LIST)
decl = TREE_VALUE (decl);
gcc_assert (IDENTIFIER_MARKED (DECL_NAME (decl)));
IDENTIFIER_MARKED (DECL_NAME (decl)) = 0;
}
}
if (unchanged_cfun || DECL_NONSTATIC_MEMBER_FUNCTION_P (changed_func_decl))
{
/* Check whether the oracle supplies us with a "this", and if
so, arrange for data members and this itself to be
usable. */
tree this_val = lookup_name (get_identifier ("this"));
current_class_ref = !this_val ? NULL_TREE
: cp_build_indirect_ref (input_location, this_val, RO_NULL,
tf_warning_or_error);
current_class_ptr = this_val;
}
}
static void
plugin_pragma_pop_user_expression (cpp_reader *)
{
if (--push_count)
return;
gcc_assert (cp_binding_oracle);
gcc_assert (at_function_scope_p ());
function *save_cfun = cfun;
current_class_ptr = NULL_TREE;
current_class_ref = NULL_TREE;
cfun = NULL;
pop_scope ();
if (RECORD_OR_UNION_CODE_P (TREE_CODE (DECL_CONTEXT (current_function_decl))))
current_class_type = DECL_CONTEXT (current_function_decl);
{
int success;
cc1_plugin::call (current_context, "leave_scope", &success);
}
if (!cfun)
cfun = save_cfun;
else
gcc_assert (cfun == save_cfun);
cp_binding_oracle = NULL;
gcc_assert (at_function_scope_p ());
}
static void
plugin_init_extra_pragmas (void *, void *)
{
c_register_pragma ("GCC", "push_user_expression", plugin_pragma_push_user_expression);
c_register_pragma ("GCC", "pop_user_expression", plugin_pragma_pop_user_expression);
/* FIXME: this one should go once we get GDB to use push and pop. */
c_register_pragma ("GCC", "user_expression", plugin_pragma_push_user_expression);
}
static decl_addr_value
build_decl_addr_value (tree decl, gcc_address address)
{
decl_addr_value value = {
decl,
build_int_cst_type (ptr_type_node, address)
};
return value;
}
static decl_addr_value *
record_decl_address (plugin_context *ctx, decl_addr_value value)
{
decl_addr_value **slot = ctx->address_map.find_slot (&value, INSERT);
gcc_assert (*slot == NULL);
*slot
= static_cast<decl_addr_value *> (xmalloc (sizeof (decl_addr_value)));
**slot = value;
/* We don't want GCC to warn about e.g. static functions
without a code definition. */
suppress_warning (value.decl);
return *slot;
}
// Maybe rewrite a decl to its address.
static tree
address_rewriter (tree *in, int *walk_subtrees, void *arg)
{
plugin_context *ctx = (plugin_context *) arg;
if (!DECL_P (*in)
|| TREE_CODE (*in) == NAMESPACE_DECL
|| DECL_NAME (*in) == NULL_TREE)
return NULL_TREE;
decl_addr_value value;
value.decl = *in;
decl_addr_value *found_value = ctx->address_map.find (&value);
if (found_value != NULL)
;
else if (HAS_DECL_ASSEMBLER_NAME_P (*in))
{
gcc_address address;
if (!cc1_plugin::call (ctx, "address_oracle", &address,
IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (*in))))
return NULL_TREE;
if (address == 0)
return NULL_TREE;
// Insert the decl into the address map in case it is referenced
// again.
value = build_decl_addr_value (value.decl, address);
found_value = record_decl_address (ctx, value);
}
else
return NULL_TREE;
if (found_value->address != error_mark_node)
{
// We have an address for the decl, so rewrite the tree.
tree ptr_type = build_pointer_type (TREE_TYPE (*in));
*in = fold_build1 (INDIRECT_REF, TREE_TYPE (*in),
fold_build1 (CONVERT_EXPR, ptr_type,
found_value->address));
}
*walk_subtrees = 0;
return NULL_TREE;
}
// When generating code for gdb, we want to be able to use absolute
// addresses to refer to otherwise external objects that gdb knows
// about. gdb passes in these addresses when building decls, and then
// before gimplification we go through the trees, rewriting uses to
// the equivalent of "*(TYPE *) ADDR".
static void
rewrite_decls_to_addresses (void *function_in, void *)
{
tree function = (tree) function_in;
// Do nothing if we're not in gdb.
if (current_context == NULL)
return;
walk_tree (&DECL_SAVED_TREE (function), address_rewriter, current_context,
NULL);
}
static inline tree
safe_push_template_decl (tree decl)
{
void (*save_oracle) (enum cp_oracle_request, tree identifier);
save_oracle = cp_binding_oracle;
cp_binding_oracle = NULL;
tree ret = push_template_decl (decl);
cp_binding_oracle = save_oracle;
return ret;
}
static inline tree
safe_pushtag (tree name, tree type)
{
void (*save_oracle) (enum cp_oracle_request, tree identifier);
save_oracle = cp_binding_oracle;
cp_binding_oracle = NULL;
tree ret = pushtag (name, type);
cp_binding_oracle = save_oracle;
return ret;
}
static inline tree
safe_pushdecl (tree decl)
{
void (*save_oracle) (enum cp_oracle_request, tree identifier);
save_oracle = cp_binding_oracle;
cp_binding_oracle = NULL;
tree ret = pushdecl (decl);
cp_binding_oracle = save_oracle;
return ret;
}
int
plugin_push_namespace (cc1_plugin::connection *,
const char *name)
{
if (name && !*name)
push_to_top_level ();
else
push_namespace (name ? get_identifier (name) : NULL);
return 1;
}
int
plugin_push_class (cc1_plugin::connection *,
gcc_type type_in)
{
tree type = convert_in (type_in);
gcc_assert (RECORD_OR_UNION_CODE_P (TREE_CODE (type)));
gcc_assert (TYPE_CONTEXT (type) == FROB_CONTEXT (current_scope ()));
pushclass (type);
return 1;
}
int
plugin_push_function (cc1_plugin::connection *,
gcc_decl function_decl_in)
{
tree fndecl = convert_in (function_decl_in);
gcc_assert (TREE_CODE (fndecl) == FUNCTION_DECL);
gcc_assert (DECL_CONTEXT (fndecl) == FROB_CONTEXT (current_scope ()));
push_fake_function (fndecl);
return 1;
}
int
plugin_pop_binding_level (cc1_plugin::connection *)
{
pop_scope ();
return 1;
}
int
plugin_reactivate_decl (cc1_plugin::connection *,
gcc_decl decl_in,
gcc_decl scope_in)
{
tree decl = convert_in (decl_in);
tree scope = convert_in (scope_in);
gcc_assert (TREE_CODE (decl) == VAR_DECL
|| TREE_CODE (decl) == FUNCTION_DECL
|| TREE_CODE (decl) == TYPE_DECL);
cp_binding_level *b;
if (scope)
{
gcc_assert (TREE_CODE (scope) == FUNCTION_DECL);
for (b = current_binding_level;
b->this_entity != scope;
b = b->level_chain)
gcc_assert (b->this_entity != global_namespace);
}
else
{
gcc_assert (!at_class_scope_p ());
b = current_binding_level;
}
reactivate_decl (decl, b);
return 1;
}
static tree
get_current_scope ()
{
tree decl;
if (at_namespace_scope_p ())
decl = current_namespace;
else if (at_class_scope_p ())
decl = TYPE_NAME (current_class_type);
else if (at_fake_function_scope_p () || at_function_scope_p ())
decl = current_function_decl;
else
gcc_unreachable ();
return decl;
}
gcc_decl
plugin_get_current_binding_level_decl (cc1_plugin::connection *)
{
tree decl = get_current_scope ();
return convert_out (decl);
}
int
plugin_make_namespace_inline (cc1_plugin::connection *)
{
tree inline_ns = current_namespace;
gcc_assert (toplevel_bindings_p ());
gcc_assert (inline_ns != global_namespace);
tree parent_ns = CP_DECL_CONTEXT (inline_ns);
if (DECL_NAMESPACE_INLINE_P (inline_ns))
return 0;
DECL_NAMESPACE_INLINE_P (inline_ns) = true;
vec_safe_push (DECL_NAMESPACE_INLINEES (parent_ns), inline_ns);
return 1;
}
int
plugin_add_using_namespace (cc1_plugin::connection *,
gcc_decl used_ns_in)
{
tree used_ns = convert_in (used_ns_in);
gcc_assert (TREE_CODE (used_ns) == NAMESPACE_DECL);
finish_using_directive (used_ns, NULL_TREE);
return 1;
}
int
plugin_add_namespace_alias (cc1_plugin::connection *,
const char *id,
gcc_decl target_in)
{
tree name = get_identifier (id);
tree target = convert_in (target_in);
do_namespace_alias (name, target);
return 1;
}
static inline void
set_access_flags (tree decl, enum gcc_cp_symbol_kind flags)
{
gcc_assert (!(flags & GCC_CP_ACCESS_MASK) == !DECL_CLASS_SCOPE_P (decl));
switch (flags & GCC_CP_ACCESS_MASK)
{
case GCC_CP_ACCESS_PRIVATE:
TREE_PRIVATE (decl) = true;
current_access_specifier = access_private_node;
break;
case GCC_CP_ACCESS_PROTECTED:
TREE_PROTECTED (decl) = true;
current_access_specifier = access_protected_node;
break;
case GCC_CP_ACCESS_PUBLIC:
current_access_specifier = access_public_node;
break;
default:
break;
}
}
int
plugin_add_using_decl (cc1_plugin::connection *,
enum gcc_cp_symbol_kind flags,
gcc_decl target_in)
{
tree target = convert_in (target_in);
gcc_assert ((flags & GCC_CP_SYMBOL_MASK) == GCC_CP_SYMBOL_USING);
gcc_assert (!(flags & GCC_CP_FLAG_MASK));
enum gcc_cp_symbol_kind acc_flags;
acc_flags = (enum gcc_cp_symbol_kind) (flags & GCC_CP_ACCESS_MASK);
gcc_assert (!template_parm_scope_p ());
bool class_member_p = at_class_scope_p ();
gcc_assert (!(acc_flags & GCC_CP_ACCESS_MASK) == !class_member_p);
tree identifier = DECL_NAME (target);
tree tcontext = DECL_CONTEXT (target);
if (UNSCOPED_ENUM_P (tcontext))
tcontext = CP_TYPE_CONTEXT (tcontext);
if (class_member_p)
{
tree decl = do_class_using_decl (tcontext, identifier);
set_access_flags (decl, flags);
finish_member_declaration (decl);
}
else
{
/* We can't be at local scope. */
gcc_assert (at_namespace_scope_p ());
finish_nonmember_using_decl (tcontext, identifier);
}
return 1;
}
static tree
build_named_class_type (enum tree_code code,
tree id,
location_t loc)
{
/* See at_fake_function_scope_p. */
gcc_assert (!at_function_scope_p ());
tree type = make_class_type (code);
tree type_decl = build_decl (loc, TYPE_DECL, id, type);
TYPE_NAME (type) = type_decl;
TYPE_STUB_DECL (type) = type_decl;
DECL_CONTEXT (type_decl) = TYPE_CONTEXT (type);
return type_decl;
}
/* Abuse an unused field of the dummy template parms entry to hold the
parm list. */
#define TP_PARM_LIST TREE_TYPE (current_template_parms)
gcc_decl
plugin_build_decl (cc1_plugin::connection *self,
const char *name,
enum gcc_cp_symbol_kind sym_kind,
gcc_type sym_type_in,
const char *substitution_name,
gcc_address address,
const char *filename,
unsigned int line_number)
{
plugin_context *ctx = static_cast<plugin_context *> (self);
gcc_assert (!name || !strchr (name, ':')); // FIXME: this can go eventually.
enum tree_code code;
tree decl;
tree sym_type = convert_in (sym_type_in);
enum gcc_cp_symbol_kind sym_flags;
sym_flags = (enum gcc_cp_symbol_kind) (sym_kind & GCC_CP_FLAG_MASK);
enum gcc_cp_symbol_kind acc_flags;
acc_flags = (enum gcc_cp_symbol_kind) (sym_kind & GCC_CP_ACCESS_MASK);
sym_kind = (enum gcc_cp_symbol_kind) (sym_kind & GCC_CP_SYMBOL_MASK);
switch (sym_kind)
{
case GCC_CP_SYMBOL_FUNCTION:
code = FUNCTION_DECL;
gcc_assert (!(sym_flags & ~GCC_CP_FLAG_MASK_FUNCTION));
break;
case GCC_CP_SYMBOL_VARIABLE:
code = VAR_DECL;
gcc_assert (!(sym_flags & ~GCC_CP_FLAG_MASK_VARIABLE));
break;
case GCC_CP_SYMBOL_TYPEDEF:
code = TYPE_DECL;
gcc_assert (!sym_flags);
break;
case GCC_CP_SYMBOL_CLASS:
code = RECORD_TYPE;
gcc_assert (!(sym_flags & ~GCC_CP_FLAG_MASK_CLASS));
gcc_assert (!sym_type);
break;
case GCC_CP_SYMBOL_UNION:
code = UNION_TYPE;
gcc_assert (!sym_flags);
gcc_assert (!sym_type);
break;
default:
gcc_unreachable ();
}
bool template_decl_p = template_parm_scope_p ();
if (template_decl_p)
{
gcc_assert (code == FUNCTION_DECL || code == RECORD_TYPE
|| code == TYPE_DECL);
/* Finish the template parm list that started this template parm. */
end_template_parm_list (TP_PARM_LIST);
gcc_assert (!address);
gcc_assert (!substitution_name);
}
location_t loc = ctx->get_location_t (filename, line_number);
bool class_member_p = at_class_scope_p ();
bool ctor = false, dtor = false, assop = false;
tree_code opcode = ERROR_MARK;
gcc_assert (!(acc_flags & GCC_CP_ACCESS_MASK) == !class_member_p);
tree identifier;
if (code != FUNCTION_DECL
|| !(sym_flags & GCC_CP_FLAG_SPECIAL_FUNCTION))
{
if (name)
identifier = get_identifier (name);
else
{
gcc_assert (RECORD_OR_UNION_CODE_P (code));
identifier = make_anon_name ();
}
}
if (code == FUNCTION_DECL)
{
if (sym_flags & GCC_CP_FLAG_SPECIAL_FUNCTION)
{
#define CHARS2(f,s) (((unsigned char)f << CHAR_BIT) | (unsigned char)s)
switch (CHARS2 (name[0], name[1]))
{
case CHARS2 ('C', 0x0): // ctor base declaration
case CHARS2 ('C', ' '):
case CHARS2 ('C', '1'):
case CHARS2 ('C', '2'):
case CHARS2 ('C', '4'):
ctor = true;
cdtor:
gcc_assert (!address);
gcc_assert (!substitution_name);
identifier = DECL_NAME (TYPE_NAME (current_class_type));
break;
case CHARS2 ('D', 0x0): // dtor base declaration