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compile-cplus-types.c
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/* Convert types from GDB to GCC
Copyright (C) 2014-2025 Free Software Foundation, Inc.
This file is part of GDB.
This program 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 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
#include "gdbsupport/preprocessor.h"
#include "gdbtypes.h"
#include "compile-internal.h"
#include "compile-cplus.h"
#include "gdbsupport/gdb_assert.h"
#include "symtab.h"
#include "source.h"
#include "cp-support.h"
#include "cp-abi.h"
#include "objfiles.h"
#include "block.h"
#include "cli/cli-cmds.h"
#include "c-lang.h"
#include "compile-c.h"
#include <algorithm>
/* Default compile flags for C++. */
const char *compile_cplus_instance::m_default_cflags = "-std=gnu++11";
/* Flag to enable internal debugging. */
static bool debug_compile_cplus_types = false;
/* Flag to enable internal scope switching debugging. */
static bool debug_compile_cplus_scopes = false;
/* Forward declarations. */
static gcc_type compile_cplus_convert_func (compile_cplus_instance *instance,
struct type *type,
bool strip_artificial);
/* See description in compile-cplus.h. */
gdb::unique_xmalloc_ptr<char>
compile_cplus_instance::decl_name (const char *natural)
{
if (natural == nullptr)
return nullptr;
gdb::unique_xmalloc_ptr<char> name = cp_func_name (natural);
if (name != nullptr)
return name;
return make_unique_xstrdup (natural);
}
/* Get the access flag for the NUM'th field of TYPE. */
static enum gcc_cp_symbol_kind
get_field_access_flag (const struct type *type, int num)
{
field &fld = type->field (num);
if (fld.is_protected ())
return GCC_CP_ACCESS_PROTECTED;
else if (fld.is_private ())
return GCC_CP_ACCESS_PRIVATE;
/* GDB assumes everything else is public. */
return GCC_CP_ACCESS_PUBLIC;
}
/* Get the access flag for the NUM'th method of TYPE's FNI'th
fieldlist. */
enum gcc_cp_symbol_kind
get_method_access_flag (const struct type *type, int fni, int num)
{
gdb_assert (type->code () == TYPE_CODE_STRUCT);
/* If this type was not declared a class, everything is public. */
if (!type->is_declared_class ())
return GCC_CP_ACCESS_PUBLIC;
/* Otherwise, read accessibility from the fn_field. */
const struct fn_field *methods = TYPE_FN_FIELDLIST1 (type, fni);
if (TYPE_FN_FIELD_PROTECTED (methods, num))
return GCC_CP_ACCESS_PROTECTED;
else if (TYPE_FN_FIELD_PRIVATE (methods, num))
return GCC_CP_ACCESS_PRIVATE;
else
return GCC_CP_ACCESS_PUBLIC;
}
/* A useful debugging function to output the scope SCOPE to stdout. */
static void __attribute__ ((used))
debug_print_scope (const compile_scope &scope)
{
for (const auto &comp: scope)
{
const char *symbol = (comp.bsymbol.symbol != nullptr
? comp.bsymbol.symbol->natural_name ()
: "<none>");
printf_unfiltered ("\tname = %s, symbol = %s\n", comp.name.c_str (),
symbol);
}
}
/* See description in compile-cplus.h. */
compile_scope
type_name_to_scope (const char *type_name, const struct block *block)
{
compile_scope scope;
if (type_name == nullptr)
{
/* An anonymous type. We cannot really do much here. We simply cannot
look up anonymous types easily/at all. */
return scope;
}
const char *p = type_name;
std::string lookup_name;
while (*p != '\0')
{
/* Create a string token of the first component of TYPE_NAME. */
int len = cp_find_first_component (p);
std::string s (p, len);
/* Advance past the last token. */
p += len;
/* Look up the symbol and decide when to stop. */
if (!lookup_name.empty ())
lookup_name += "::";
lookup_name += s;
/* Look up the resulting name. */
struct block_symbol bsymbol
= lookup_symbol (lookup_name.c_str (), block, SEARCH_VFT, nullptr);
if (bsymbol.symbol != nullptr)
{
scope_component comp = {s, bsymbol};
scope.push_back (comp);
if (bsymbol.symbol->type ()->code () != TYPE_CODE_NAMESPACE)
{
/* We're done. */
break;
}
}
if (*p == ':')
{
++p;
if (*p == ':')
++p;
else
{
/* This shouldn't happen since we are not attempting to
loop over user input. This name is generated by GDB
from debug info. */
internal_error (_("malformed TYPE_NAME during parsing"));
}
}
}
return scope;
}
/* Compare two scope_components for equality. These are equal if the names
of the two components' are the same. */
bool
operator== (const scope_component &lhs, const scope_component &rhs)
{
return lhs.name == rhs.name;
}
/* Compare two scope_components for inequality. These are not equal if
the two components' names are not equal. */
bool
operator!= (const scope_component &lhs, const scope_component &rhs)
{
return lhs.name != rhs.name;
}
/* Compare two compile_scopes for equality. These are equal if they are both
contain the same number of components and each component is equal. */
bool
operator== (const compile_scope &lhs, const compile_scope &rhs)
{
if (lhs.size () != rhs.size ())
return false;
for (int i = 0; i < lhs.size (); ++i)
{
if (lhs[i] != rhs[i])
return false;
}
return true;
}
/* Compare two compile_scopes for inequality. These are inequal if they
contain unequal number of elements or if any of the components are not
the same. */
bool
operator!= (const compile_scope &lhs, const compile_scope &rhs)
{
if (lhs.size () != rhs.size ())
return true;
for (int i = 0; i < lhs.size (); ++i)
{
if (lhs[i] != rhs[i])
return true;
}
return false;
}
/* See description in compile-cplus.h. */
void
compile_cplus_instance::enter_scope (compile_scope &&new_scope)
{
bool must_push = m_scopes.empty () || m_scopes.back () != new_scope;
new_scope.m_pushed = must_push;
/* Save the new scope. */
m_scopes.push_back (std::move (new_scope));
if (must_push)
{
if (debug_compile_cplus_scopes)
{
gdb_printf (gdb_stdlog, "entering new scope %s\n",
host_address_to_string (&m_scopes.back ()));
}
/* Push the global namespace. */
plugin ().push_namespace ("");
/* Push all other namespaces. Note that we do not push the last
scope_component -- that's the actual type we are converting. */
std::for_each
(m_scopes.back ().begin (), m_scopes.back ().end () - 1,
[this] (const scope_component &comp)
{
gdb_assert (comp.bsymbol.symbol->type ()->code ()
== TYPE_CODE_NAMESPACE);
const char *ns = (comp.name == CP_ANONYMOUS_NAMESPACE_STR ? nullptr
: comp.name.c_str ());
this->plugin ().push_namespace (ns);
});
}
else
{
if (debug_compile_cplus_scopes)
{
gdb_printf (gdb_stdlog, "staying in current scope -- "
"scopes are identical\n");
}
}
}
/* See description in compile-cplus.h. */
void
compile_cplus_instance::leave_scope ()
{
/* Get the current scope and remove it from the internal list of
scopes. */
compile_scope current = m_scopes.back ();
m_scopes.pop_back ();
if (current.m_pushed)
{
if (debug_compile_cplus_scopes)
{
gdb_printf (gdb_stdlog, "leaving scope %s\n",
host_address_to_string (¤t));
}
/* Pop namespaces. */
std::for_each
(current.begin (),current.end () - 1,
[this] (const scope_component &comp) {
gdb_assert (comp.bsymbol.symbol->type ()->code ()
== TYPE_CODE_NAMESPACE);
this->plugin ().pop_binding_level (comp.name.c_str ());
});
/* Pop global namespace. */
plugin ().pop_binding_level ("");
}
else
{
if (debug_compile_cplus_scopes)
gdb_printf (gdb_stdlog,
"identical scopes -- not leaving scope\n");
}
}
/* See description in compile-cplus.h. */
compile_scope
compile_cplus_instance::new_scope (const char *type_name, struct type *type)
{
/* Break the type name into components. If TYPE was defined in some
superclass, we do not process TYPE but process the enclosing type
instead. */
compile_scope scope = type_name_to_scope (type_name, block ());
if (!scope.empty ())
{
/* Get the name of the last component, which should be the
unqualified name of the type to process. */
scope_component &comp = scope.back ();
if (!types_equal (type, comp.bsymbol.symbol->type ())
&& (m_scopes.empty ()
|| (m_scopes.back ().back ().bsymbol.symbol
!= comp.bsymbol.symbol)))
{
/* The type is defined inside another class(es). Convert that
type instead of defining this type. */
convert_type (comp.bsymbol.symbol->type ());
/* If the original type (passed in to us) is defined in a nested
class, the previous call will give us that type's gcc_type.
Upper layers are expecting to get the original type's
gcc_type! */
get_cached_type (type, &scope.m_nested_type);
return scope;
}
}
else
{
if (type->name () == nullptr)
{
/* Anonymous type */
/* We don't have a qualified name for this to look up, but
we need a scope. We have to assume, then, that it is the same
as the current scope, if any. */
if (!m_scopes.empty ())
{
scope = m_scopes.back ();
scope.m_pushed = false;
}
else
scope.push_back (scope_component ());
}
else
{
scope_component comp
= {
decl_name (type->name ()).get (),
lookup_symbol (type->name (), block (), SEARCH_VFT, nullptr)
};
scope.push_back (comp);
}
}
/* There must be at least one component in the compile_scope. */
gdb_assert (scope.size () > 0);
return scope;
}
/* See description in compile-cplus.h. */
gcc_type
compile_cplus_instance::convert_reference_base
(gcc_type base, enum gcc_cp_ref_qualifiers rquals)
{
return this->plugin ().build_reference_type (base, rquals);
}
/* Convert a reference type to its gcc representation. */
static gcc_type
compile_cplus_convert_reference (compile_cplus_instance *instance,
struct type *type)
{
gcc_type target = instance->convert_type (type->target_type ());
enum gcc_cp_ref_qualifiers quals = GCC_CP_REF_QUAL_NONE;
switch (type->code ())
{
case TYPE_CODE_REF:
quals = GCC_CP_REF_QUAL_LVALUE;
break;
case TYPE_CODE_RVALUE_REF:
quals = GCC_CP_REF_QUAL_RVALUE;
break;
default:
gdb_assert_not_reached ("unexpected type code for reference type");
}
return instance->convert_reference_base (target, quals);
}
/* See description in compile-cplus.h. */
gcc_type
compile_cplus_instance::convert_pointer_base(gcc_type target)
{
return plugin ().build_pointer_type (target);
}
/* Convert a pointer type to its gcc representation. */
static gcc_type
compile_cplus_convert_pointer (compile_cplus_instance *instance,
struct type *type)
{
gcc_type target = instance->convert_type (type->target_type ());
return instance->convert_pointer_base (target);
}
/* Convert an array type to its gcc representation. */
static gcc_type
compile_cplus_convert_array (compile_cplus_instance *instance,
struct type *type)
{
struct type *range = type->index_type ();
gcc_type element_type = instance->convert_type (type->target_type ());
if (!range->bounds ()->low.is_constant ())
{
const char *s = _("array type with non-constant"
" lower bound is not supported");
return instance->plugin ().error (s);
}
if (range->bounds ()->low.const_val () != 0)
{
const char *s = _("cannot convert array type with "
"non-zero lower bound to C");
return instance->plugin ().error (s);
}
if (range->bounds ()->high.kind () == PROP_LOCEXPR
|| range->bounds ()->high.kind () == PROP_LOCLIST)
{
if (type->is_vector ())
{
const char *s = _("variably-sized vector type is not supported");
return instance->plugin ().error (s);
}
std::string upper_bound
= c_get_range_decl_name (&range->bounds ()->high);
return instance->plugin ().build_vla_array_type (element_type,
upper_bound.c_str ());
}
else
{
LONGEST low_bound, high_bound, count;
if (!get_array_bounds (type, &low_bound, &high_bound))
count = -1;
else
{
gdb_assert (low_bound == 0); /* Ensured above. */
count = high_bound + 1;
}
if (type->is_vector ())
return instance->plugin ().build_vector_type (element_type, count);
return instance->plugin ().build_array_type (element_type, count);
}
}
/* Convert a typedef of TYPE. If not GCC_CP_ACCESS_NONE, NESTED_ACCESS
will define the accessibility of the typedef definition in its
containing class. */
static gcc_type
compile_cplus_convert_typedef (compile_cplus_instance *instance,
struct type *type,
enum gcc_cp_symbol_kind nested_access)
{
compile_scope scope = instance->new_scope (type->name (), type);
if (scope.nested_type () != GCC_TYPE_NONE)
return scope.nested_type ();
gdb::unique_xmalloc_ptr<char> name
= compile_cplus_instance::decl_name (type->name ());
/* Make sure the scope for this type has been pushed. */
instance->enter_scope (std::move (scope));
/* Convert the typedef's real type. */
gcc_type typedef_type = instance->convert_type (check_typedef (type));
instance->plugin ().build_decl ("typedef", name.get (),
GCC_CP_SYMBOL_TYPEDEF | nested_access,
typedef_type, 0, 0, nullptr, 0);
/* Completed this scope. */
instance->leave_scope ();
return typedef_type;
}
/* Convert types defined in TYPE. */
static void
compile_cplus_convert_type_defns (compile_cplus_instance *instance,
struct type *type)
{
int i;
enum gcc_cp_symbol_kind accessibility;
/* Convert typedefs. */
for (i = 0; i < TYPE_TYPEDEF_FIELD_COUNT (type); ++i)
{
if (TYPE_TYPEDEF_FIELD_PROTECTED (type, i))
accessibility = GCC_CP_ACCESS_PROTECTED;
else if (TYPE_TYPEDEF_FIELD_PRIVATE (type, i))
accessibility = GCC_CP_ACCESS_PRIVATE;
else
accessibility = GCC_CP_ACCESS_PUBLIC;
instance->convert_type (TYPE_TYPEDEF_FIELD_TYPE (type, i), accessibility);
}
/* Convert nested types. */
for (i = 0; i < TYPE_NESTED_TYPES_COUNT (type); ++i)
{
if (TYPE_NESTED_TYPES_FIELD_PROTECTED (type, i))
accessibility = GCC_CP_ACCESS_PROTECTED;
else if (TYPE_NESTED_TYPES_FIELD_PRIVATE (type, i))
accessibility = GCC_CP_ACCESS_PRIVATE;
else
accessibility = GCC_CP_ACCESS_PUBLIC;
instance->convert_type (TYPE_NESTED_TYPES_FIELD_TYPE (type, i),
accessibility);
}
}
/* Convert data members defined in TYPE, which should be struct/class/union
with gcc_type COMP_TYPE. */
static void
compile_cplus_convert_struct_or_union_members
(compile_cplus_instance *instance, struct type *type, gcc_type comp_type)
{
for (int i = TYPE_N_BASECLASSES (type); i < type->num_fields (); ++i)
{
const char *field_name = type->field (i).name ();
if (type->field (i).is_ignored ()
|| type->field (i).is_artificial ())
continue;
/* GDB records unnamed/anonymous fields with empty string names. */
if (*field_name == '\0')
field_name = nullptr;
gcc_type field_type
= instance->convert_type (type->field (i).type ());
if (type->field (i).is_static ())
{
CORE_ADDR physaddr;
switch (type->field (i).loc_kind ())
{
case FIELD_LOC_KIND_PHYSADDR:
{
physaddr = type->field (i).loc_physaddr ();
instance->plugin ().build_decl
("field physaddr", field_name,
(GCC_CP_SYMBOL_VARIABLE | get_field_access_flag (type, i)),
field_type, nullptr, physaddr, nullptr, 0);
}
break;
case FIELD_LOC_KIND_PHYSNAME:
{
const char *physname = type->field (i).loc_physname ();
struct block_symbol sym
= lookup_symbol (physname, instance->block (),
SEARCH_VFT, nullptr);
if (sym.symbol == nullptr)
{
/* We didn't actually find the symbol. There's little
we can do but ignore this member. */
continue;
}
const char *filename = sym.symbol->symtab ()->filename;
unsigned int line = sym.symbol->line ();
physaddr = sym.symbol->value_address ();
instance->plugin ().build_decl
("field physname", field_name,
(GCC_CP_SYMBOL_VARIABLE| get_field_access_flag (type, i)),
field_type, nullptr, physaddr, filename, line);
}
break;
default:
gdb_assert_not_reached
("unexpected static field location kind");
}
}
else
{
unsigned long bitsize = type->field (i).bitsize ();
enum gcc_cp_symbol_kind field_flags = GCC_CP_SYMBOL_FIELD
| get_field_access_flag (type, i);
if (bitsize == 0)
bitsize = 8 * type->field (i).type ()->length ();
instance->plugin ().build_field
(field_name, field_type, field_flags, bitsize,
type->field (i).loc_bitpos ());
}
}
}
/* Convert a method type to its gcc representation. */
static gcc_type
compile_cplus_convert_method (compile_cplus_instance *instance,
struct type *parent_type,
struct type *method_type)
{
/* Get the actual function type of the method, the corresponding class's
type and corresponding qualifier flags. */
gcc_type func_type = compile_cplus_convert_func (instance, method_type, true);
gcc_type class_type = instance->convert_type (parent_type);
gcc_cp_qualifiers_flags quals = 0;
if (TYPE_CONST (method_type))
quals |= GCC_CP_QUALIFIER_CONST;
if (TYPE_VOLATILE (method_type))
quals |= GCC_CP_QUALIFIER_VOLATILE;
if (TYPE_RESTRICT (method_type))
quals |= GCC_CP_QUALIFIER_RESTRICT;
/* Not yet implemented. */
gcc_cp_ref_qualifiers_flags rquals = GCC_CP_REF_QUAL_NONE;
return instance->plugin ().build_method_type
(class_type, func_type, quals.raw (), rquals.raw ());
}
/* Convert a member or method pointer represented by TYPE. */
static gcc_type
compile_cplus_convert_memberptr (compile_cplus_instance *instance,
struct type *type)
{
struct type *containing_class = TYPE_SELF_TYPE (type);
if (containing_class == nullptr)
return GCC_TYPE_NONE;
gcc_type class_type = instance->convert_type (containing_class);
gcc_type member_type
= instance->convert_type (type->target_type ());
return instance->plugin ().build_pointer_to_member_type
(class_type, member_type);
}
/* Convert all methods defined in TYPE, which should be a class/struct/union
with gcc_type CLASS_TYPE. */
static void
compile_cplus_convert_struct_or_union_methods (compile_cplus_instance *instance,
struct type *type,
gcc_type class_type)
{
for (int i = 0; i < TYPE_NFN_FIELDS (type); ++i)
{
struct fn_field *methods = TYPE_FN_FIELDLIST1 (type, i);
gdb::unique_xmalloc_ptr<char> overloaded_name
= compile_cplus_instance::decl_name (TYPE_FN_FIELDLIST_NAME (type, i));
/* Loop through the fieldlist, adding decls to the compiler's
representation of the class. */
for (int j = 0; j < TYPE_FN_FIELDLIST_LENGTH (type, i); ++j)
{
/* Skip artificial methods. */
if (TYPE_FN_FIELD_ARTIFICIAL (methods, j))
continue;
gcc_cp_symbol_kind_flags sym_kind = GCC_CP_SYMBOL_FUNCTION;
gcc_type method_type;
struct block_symbol sym
= lookup_symbol (TYPE_FN_FIELD_PHYSNAME (methods, j),
instance->block (), SEARCH_VFT, nullptr);
if (sym.symbol == nullptr)
{
if (TYPE_FN_FIELD_VIRTUAL_P (methods, j))
{
/* This is beyond hacky, and is really only a workaround for
detecting pure virtual methods. */
method_type = compile_cplus_convert_method
(instance, type, TYPE_FN_FIELD_TYPE (methods, j));
instance->plugin ().build_decl
("pure virtual method", overloaded_name.get (),
(sym_kind
| get_method_access_flag (type, i, j)
| GCC_CP_FLAG_VIRTUAL_FUNCTION
| GCC_CP_FLAG_PURE_VIRTUAL_FUNCTION).raw (),
method_type, nullptr, 0, nullptr, 0);
continue;
}
/* This can happen if we have a DW_AT_declaration DIE
for the method, but no "definition"-type DIE (with
DW_AT_specification referencing the decl DIE), i.e.,
the compiler has probably optimized the method away.
In this case, all we can hope to do is issue a warning
to the user letting him know. If the user has not actually
requested using this method, things should still work. */
warning (_("Method %s appears to be optimized out.\n"
"All references to this method will be undefined."),
TYPE_FN_FIELD_PHYSNAME (methods, j));
continue;
}
const char *filename = sym.symbol->symtab ()->filename;
unsigned int line = sym.symbol->line ();
CORE_ADDR address = sym.symbol->value_block()->start ();
const char *kind;
if (TYPE_FN_FIELD_STATIC_P (methods, j))
{
kind = "static method";
method_type = compile_cplus_convert_func
(instance, TYPE_FN_FIELD_TYPE (methods, j), true);
}
else
{
kind = "method";
method_type = (compile_cplus_convert_method
(instance, type, TYPE_FN_FIELD_TYPE (methods, j)));
}
if (TYPE_FN_FIELD_VIRTUAL_P (methods, j))
sym_kind |= GCC_CP_FLAG_VIRTUAL_FUNCTION;
instance->plugin ().build_decl
(kind, overloaded_name.get (),
(sym_kind | get_method_access_flag (type, i, j)).raw (),
method_type, nullptr, address, filename, line);
}
}
}
/* Convert a struct or union type to its gcc representation. If this type
was defined in another type, NESTED_ACCESS should indicate the
accessibility of this type. */
static gcc_type
compile_cplus_convert_struct_or_union (compile_cplus_instance *instance,
struct type *type,
enum gcc_cp_symbol_kind nested_access)
{
const char *filename = nullptr;
unsigned int line = 0;
/* Get the decl name of this type. */
gdb::unique_xmalloc_ptr<char> name
= compile_cplus_instance::decl_name (type->name ());
/* Create a new scope for TYPE. */
compile_scope scope = instance->new_scope (type->name (), type);
if (scope.nested_type () != GCC_TYPE_NONE)
{
/* The type requested was actually defined inside another type,
such as a nested class definition. Return that type. */
return scope.nested_type ();
}
/* Push all scopes. */
instance->enter_scope (std::move (scope));
/* First we create the resulting type and enter it into our hash
table. This lets recursive types work. */
gcc_decl resuld;
if (type->code () == TYPE_CODE_STRUCT)
{
const char *what = type->is_declared_class () ? "class" : "struct";
resuld = instance->plugin ().build_decl
(what, name.get (), (GCC_CP_SYMBOL_CLASS | nested_access
| (type->is_declared_class ()
? GCC_CP_FLAG_CLASS_NOFLAG
: GCC_CP_FLAG_CLASS_IS_STRUCT)),
0, nullptr, 0, filename, line);
}
else
{
gdb_assert (type->code () == TYPE_CODE_UNION);
resuld = instance->plugin ().build_decl
("union", name.get (), GCC_CP_SYMBOL_UNION | nested_access,
0, nullptr, 0, filename, line);
}
gcc_type result;
if (type->code () == TYPE_CODE_STRUCT)
{
int num_baseclasses = TYPE_N_BASECLASSES (type);
std::vector<gcc_type> elements (num_baseclasses);
std::vector<enum gcc_cp_symbol_kind> flags (num_baseclasses);
struct gcc_vbase_array bases {};
bases.elements = elements.data ();
bases.flags = flags.data ();
bases.n_elements = num_baseclasses;
for (int i = 0; i < num_baseclasses; ++i)
{
struct type *base_type = TYPE_BASECLASS (type, i);
bases.flags[i] = (GCC_CP_SYMBOL_BASECLASS
| get_field_access_flag (type, i)
| (BASETYPE_VIA_VIRTUAL (type, i)
? GCC_CP_FLAG_BASECLASS_VIRTUAL
: GCC_CP_FLAG_BASECLASS_NOFLAG));
bases.elements[i] = instance->convert_type (base_type);
}
result = instance->plugin ().start_class_type
(name.get (), resuld, &bases, filename, line);
}
else
{
gdb_assert (type->code () == TYPE_CODE_UNION);
result = instance->plugin ().start_class_type
(name.get (), resuld, nullptr, filename, line);
}
instance->insert_type (type, result);
/* Add definitions. */
compile_cplus_convert_type_defns (instance, type);
/* Add methods. */
compile_cplus_convert_struct_or_union_methods (instance, type, result);
/* Add members. */
compile_cplus_convert_struct_or_union_members (instance, type, result);
/* All finished. */
instance->plugin ().finish_class_type (name.get (), type->length ());
/* Pop all scopes. */
instance->leave_scope ();
return result;
}
/* Convert an enum type to its gcc representation. If this type
was defined in another type, NESTED_ACCESS should indicate the
accessibility of this type.*/
static gcc_type
compile_cplus_convert_enum (compile_cplus_instance *instance, struct type *type,
enum gcc_cp_symbol_kind nested_access)
{
bool scoped_enum_p = false;
/* Create a new scope for this type. */
compile_scope scope = instance->new_scope (type->name (), type);
if (scope.nested_type () != GCC_TYPE_NONE)
{
/* The type requested was actually defined inside another type,
such as a nested class definition. Return that type. */
return scope.nested_type ();
}
gdb::unique_xmalloc_ptr<char> name
= compile_cplus_instance::decl_name (type->name ());
/* Push all scopes. */
instance->enter_scope (std::move (scope));
gcc_type int_type
= instance->plugin ().get_int_type (type->is_unsigned (),
type->length (), nullptr);
gcc_type result
= instance->plugin ().start_enum_type (name.get (), int_type,
GCC_CP_SYMBOL_ENUM | nested_access
| (scoped_enum_p
? GCC_CP_FLAG_ENUM_SCOPED
: GCC_CP_FLAG_ENUM_NOFLAG),
nullptr, 0);
for (int i = 0; i < type->num_fields (); ++i)
{
gdb::unique_xmalloc_ptr<char> fname
= compile_cplus_instance::decl_name (type->field (i).name ());
if (type->field (i).loc_kind () != FIELD_LOC_KIND_ENUMVAL
|| fname == nullptr)
continue;
instance->plugin ().build_enum_constant (result, fname.get (),
type->field (i).loc_enumval ());
}
/* Finish enum definition and pop scopes. */
instance->plugin ().finish_enum_type (result);
instance->leave_scope ();
return result;
}
/* Convert a function type to its gcc representation. This function does
not deal with function templates. */
static gcc_type
compile_cplus_convert_func (compile_cplus_instance *instance,
struct type *type, bool strip_artificial)
{
int is_varargs = type->has_varargs ();
struct type *target_type = type->target_type ();
/* Functions with no debug info have no return type. Ideally we'd
want to fallback to the type of the cast just before the
function, like GDB's built-in expression parser, but we don't
have access to that type here. For now, fallback to int, like
GDB's parser used to do. */
if (target_type == nullptr)
{
target_type = builtin_type (type->arch ())->builtin_int;
warning (_("function has unknown return type; assuming int"));
}
/* This approach means we can't make self-referential function
types. Those are impossible in C, though. */
gcc_type return_type = instance->convert_type (target_type);
std::vector<gcc_type> elements (type->num_fields ());
struct gcc_type_array array = { (int) type->num_fields (), elements.data () };
int artificials = 0;
for (int i = 0; i < type->num_fields (); ++i)
{
if (strip_artificial && type->field (i).is_artificial ())
{
--array.n_elements;
++artificials;
}
else
{
array.elements[i - artificials]
= instance->convert_type (type->field (i).type ());
}
}
/* We omit setting the argument types to `void' to be a little flexible
with some minsyms like printf (compile-cplus.exp has examples). */
gcc_type result = instance->plugin ().build_function_type
(return_type, &array, is_varargs);