/* Generic code for supporting multiple C++ ABI's
- Copyright 2001 Free Software Foundation, Inc.
+
+ Copyright (C) 2001-2019 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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "value.h"
#include "cp-abi.h"
+#include "command.h"
+#include "gdbcmd.h"
+#include "ui-out.h"
+static struct cp_abi_ops *find_cp_abi (const char *short_name);
-struct cp_abi_ops current_cp_abi;
-
-struct cp_abi_ops *cp_abis;
+static struct cp_abi_ops current_cp_abi = { "", NULL };
+static struct cp_abi_ops auto_cp_abi = { "auto", NULL };
-int num_cp_abis = 0;
+#define CP_ABI_MAX 8
+static struct cp_abi_ops *cp_abis[CP_ABI_MAX];
+static int num_cp_abis = 0;
enum ctor_kinds
is_constructor_name (const char *name)
{
if ((current_cp_abi.is_constructor_name) == NULL)
- error ("ABI doesn't define required function is_constructor_name");
+ error (_("ABI doesn't define required function is_constructor_name"));
return (*current_cp_abi.is_constructor_name) (name);
}
is_destructor_name (const char *name)
{
if ((current_cp_abi.is_destructor_name) == NULL)
- error ("ABI doesn't define required function is_destructor_name");
+ error (_("ABI doesn't define required function is_destructor_name"));
return (*current_cp_abi.is_destructor_name) (name);
}
is_vtable_name (const char *name)
{
if ((current_cp_abi.is_vtable_name) == NULL)
- error ("ABI doesn't define required function is_vtable_name");
+ error (_("ABI doesn't define required function is_vtable_name"));
return (*current_cp_abi.is_vtable_name) (name);
}
is_operator_name (const char *name)
{
if ((current_cp_abi.is_operator_name) == NULL)
- error ("ABI doesn't define required function is_operator_name");
+ error (_("ABI doesn't define required function is_operator_name"));
return (*current_cp_abi.is_operator_name) (name);
}
-value_ptr
-value_virtual_fn_field (value_ptr * arg1p, struct fn_field * f, int j,
- struct type * type, int offset)
+int
+baseclass_offset (struct type *type, int index, const gdb_byte *valaddr,
+ LONGEST embedded_offset, CORE_ADDR address,
+ const struct value *val)
+{
+ int res = 0;
+
+ gdb_assert (current_cp_abi.baseclass_offset != NULL);
+
+ try
+ {
+ res = (*current_cp_abi.baseclass_offset) (type, index, valaddr,
+ embedded_offset,
+ address, val);
+ }
+ catch (const gdb_exception_error &ex)
+ {
+ if (ex.error != NOT_AVAILABLE_ERROR)
+ throw;
+
+ throw_error (NOT_AVAILABLE_ERROR,
+ _("Cannot determine virtual baseclass offset "
+ "of incomplete object"));
+ }
+
+ return res;
+}
+
+struct value *
+value_virtual_fn_field (struct value **arg1p,
+ struct fn_field *f, int j,
+ struct type *type, int offset)
{
if ((current_cp_abi.virtual_fn_field) == NULL)
return NULL;
- return (*current_cp_abi.virtual_fn_field) (arg1p, f, j, type, offset);
+ return (*current_cp_abi.virtual_fn_field) (arg1p, f, j,
+ type, offset);
}
+
struct type *
-value_rtti_type (value_ptr v, int *full, int *top, int *using_enc)
+value_rtti_type (struct value *v, int *full,
+ LONGEST *top, int *using_enc)
{
- if ((current_cp_abi.rtti_type) == NULL)
+ struct type *ret = NULL;
+
+ if ((current_cp_abi.rtti_type) == NULL
+ || !HAVE_CPLUS_STRUCT (check_typedef (value_type (v))))
return NULL;
- return (*current_cp_abi.rtti_type) (v, full, top, using_enc);
+ try
+ {
+ ret = (*current_cp_abi.rtti_type) (v, full, top, using_enc);
+ }
+ catch (const gdb_exception_error &e)
+ {
+ return NULL;
+ }
+
+ return ret;
+}
+
+void
+cplus_print_method_ptr (const gdb_byte *contents,
+ struct type *type,
+ struct ui_file *stream)
+{
+ if (current_cp_abi.print_method_ptr == NULL)
+ error (_("GDB does not support pointers to methods on this target"));
+ (*current_cp_abi.print_method_ptr) (contents, type, stream);
}
int
-register_cp_abi (struct cp_abi_ops abi)
+cplus_method_ptr_size (struct type *to_type)
{
- cp_abis =
- xrealloc (cp_abis, (num_cp_abis + 1) * sizeof (struct cp_abi_ops));
- cp_abis[num_cp_abis++] = abi;
+ if (current_cp_abi.method_ptr_size == NULL)
+ error (_("GDB does not support pointers to methods on this target"));
+ return (*current_cp_abi.method_ptr_size) (to_type);
+}
- return 1;
+void
+cplus_make_method_ptr (struct type *type, gdb_byte *contents,
+ CORE_ADDR value, int is_virtual)
+{
+ if (current_cp_abi.make_method_ptr == NULL)
+ error (_("GDB does not support pointers to methods on this target"));
+ (*current_cp_abi.make_method_ptr) (type, contents, value, is_virtual);
+}
+
+CORE_ADDR
+cplus_skip_trampoline (struct frame_info *frame,
+ CORE_ADDR stop_pc)
+{
+ if (current_cp_abi.skip_trampoline == NULL)
+ return 0;
+ return (*current_cp_abi.skip_trampoline) (frame, stop_pc);
+}
+struct value *
+cplus_method_ptr_to_value (struct value **this_p,
+ struct value *method_ptr)
+{
+ if (current_cp_abi.method_ptr_to_value == NULL)
+ error (_("GDB does not support pointers to methods on this target"));
+ return (*current_cp_abi.method_ptr_to_value) (this_p, method_ptr);
+}
+
+/* See cp-abi.h. */
+
+void
+cplus_print_vtable (struct value *value)
+{
+ if (current_cp_abi.print_vtable == NULL)
+ error (_("GDB cannot print the vtable on this target"));
+ (*current_cp_abi.print_vtable) (value);
+}
+
+/* See cp-abi.h. */
+
+struct value *
+cplus_typeid (struct value *value)
+{
+ if (current_cp_abi.get_typeid == NULL)
+ error (_("GDB cannot find the typeid on this target"));
+ return (*current_cp_abi.get_typeid) (value);
+}
+
+/* See cp-abi.h. */
+
+struct type *
+cplus_typeid_type (struct gdbarch *gdbarch)
+{
+ if (current_cp_abi.get_typeid_type == NULL)
+ error (_("GDB cannot find the type for 'typeid' on this target"));
+ return (*current_cp_abi.get_typeid_type) (gdbarch);
+}
+
+/* See cp-abi.h. */
+
+struct type *
+cplus_type_from_type_info (struct value *value)
+{
+ if (current_cp_abi.get_type_from_type_info == NULL)
+ error (_("GDB cannot find the type from a std::type_info on this target"));
+ return (*current_cp_abi.get_type_from_type_info) (value);
+}
+
+/* See cp-abi.h. */
+
+std::string
+cplus_typename_from_type_info (struct value *value)
+{
+ if (current_cp_abi.get_typename_from_type_info == NULL)
+ error (_("GDB cannot find the type name "
+ "from a std::type_info on this target"));
+ return (*current_cp_abi.get_typename_from_type_info) (value);
}
int
+cp_pass_by_reference (struct type *type)
+{
+ if ((current_cp_abi.pass_by_reference) == NULL)
+ return 0;
+ return (*current_cp_abi.pass_by_reference) (type);
+}
+
+/* Set the current C++ ABI to SHORT_NAME. */
+
+static int
switch_to_cp_abi (const char *short_name)
+{
+ struct cp_abi_ops *abi;
+
+ abi = find_cp_abi (short_name);
+ if (abi == NULL)
+ return 0;
+
+ current_cp_abi = *abi;
+ return 1;
+}
+
+/* Add ABI to the list of supported C++ ABI's. */
+
+int
+register_cp_abi (struct cp_abi_ops *abi)
+{
+ if (num_cp_abis == CP_ABI_MAX)
+ internal_error (__FILE__, __LINE__,
+ _("Too many C++ ABIs, please increase "
+ "CP_ABI_MAX in cp-abi.c"));
+
+ cp_abis[num_cp_abis++] = abi;
+
+ return 1;
+}
+
+/* Set the ABI to use in "auto" mode to SHORT_NAME. */
+
+void
+set_cp_abi_as_auto_default (const char *short_name)
+{
+ char *new_longname, *new_doc;
+ struct cp_abi_ops *abi = find_cp_abi (short_name);
+
+ if (abi == NULL)
+ internal_error (__FILE__, __LINE__,
+ _("Cannot find C++ ABI \"%s\" to set it as auto default."),
+ short_name);
+
+ if (auto_cp_abi.longname != NULL)
+ xfree ((char *) auto_cp_abi.longname);
+ if (auto_cp_abi.doc != NULL)
+ xfree ((char *) auto_cp_abi.doc);
+
+ auto_cp_abi = *abi;
+
+ auto_cp_abi.shortname = "auto";
+ new_longname = xstrprintf ("currently \"%s\"", abi->shortname);
+ auto_cp_abi.longname = new_longname;
+
+ new_doc = xstrprintf ("Automatically selected; currently \"%s\"",
+ abi->shortname);
+ auto_cp_abi.doc = new_doc;
+
+ /* Since we copy the current ABI into current_cp_abi instead of
+ using a pointer, if auto is currently the default, we need to
+ reset it. */
+ if (strcmp (current_cp_abi.shortname, "auto") == 0)
+ switch_to_cp_abi ("auto");
+}
+
+/* Return the ABI operations associated with SHORT_NAME. */
+
+static struct cp_abi_ops *
+find_cp_abi (const char *short_name)
{
int i;
+
for (i = 0; i < num_cp_abis; i++)
- if (strcmp (cp_abis[i].shortname, short_name) == 0)
- current_cp_abi = cp_abis[i];
- return 1;
+ if (strcmp (cp_abis[i]->shortname, short_name) == 0)
+ return cp_abis[i];
+
+ return NULL;
+}
+
+/* Display the list of registered C++ ABIs. */
+
+static void
+list_cp_abis (int from_tty)
+{
+ struct ui_out *uiout = current_uiout;
+ int i;
+
+ uiout->text ("The available C++ ABIs are:\n");
+ ui_out_emit_tuple tuple_emitter (uiout, "cp-abi-list");
+ for (i = 0; i < num_cp_abis; i++)
+ {
+ char pad[14];
+ int padcount;
+
+ uiout->text (" ");
+ uiout->field_string ("cp-abi", cp_abis[i]->shortname);
+
+ padcount = 16 - 2 - strlen (cp_abis[i]->shortname);
+ pad[padcount] = 0;
+ while (padcount > 0)
+ pad[--padcount] = ' ';
+ uiout->text (pad);
+
+ uiout->field_string ("doc", cp_abis[i]->doc);
+ uiout->text ("\n");
+ }
+}
+
+/* Set the current C++ ABI, or display the list of options if no
+ argument is given. */
+
+static void
+set_cp_abi_cmd (const char *args, int from_tty)
+{
+ if (args == NULL)
+ {
+ list_cp_abis (from_tty);
+ return;
+ }
+
+ if (!switch_to_cp_abi (args))
+ error (_("Could not find \"%s\" in ABI list"), args);
+}
+
+/* A completion function for "set cp-abi". */
+
+static void
+cp_abi_completer (struct cmd_list_element *ignore,
+ completion_tracker &tracker,
+ const char *text, const char *word)
+{
+ static const char **cp_abi_names;
+
+ if (cp_abi_names == NULL)
+ {
+ int i;
+
+ cp_abi_names = XNEWVEC (const char *, num_cp_abis + 1);
+ for (i = 0; i < num_cp_abis; ++i)
+ cp_abi_names[i] = cp_abis[i]->shortname;
+ cp_abi_names[i] = NULL;
+ }
+
+ complete_on_enum (tracker, cp_abi_names, text, word);
+}
+
+/* Show the currently selected C++ ABI. */
+
+static void
+show_cp_abi_cmd (const char *args, int from_tty)
+{
+ struct ui_out *uiout = current_uiout;
+
+ uiout->text ("The currently selected C++ ABI is \"");
+
+ uiout->field_string ("cp-abi", current_cp_abi.shortname);
+ uiout->text ("\" (");
+ uiout->field_string ("longname", current_cp_abi.longname);
+ uiout->text (").\n");
}
+void
+_initialize_cp_abi (void)
+{
+ struct cmd_list_element *c;
+
+ register_cp_abi (&auto_cp_abi);
+ switch_to_cp_abi ("auto");
+
+ c = add_cmd ("cp-abi", class_obscure, set_cp_abi_cmd, _("\
+Set the ABI used for inspecting C++ objects.\n\
+\"set cp-abi\" with no arguments will list the available ABIs."),
+ &setlist);
+ set_cmd_completer (c, cp_abi_completer);
+
+ add_cmd ("cp-abi", class_obscure, show_cp_abi_cmd,
+ _("Show the ABI used for inspecting C++ objects."),
+ &showlist);
+}
projects / deliverable / binutils-gdb.git / blobdiff