| /* Generic code for supporting multiple C++ ABI's |
| |
| Copyright (C) 2001-2024 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 "language.h" |
| #include "value.h" |
| #include "cp-abi.h" |
| #include "command.h" |
| #include "cli/cli-cmds.h" |
| #include "ui-out.h" |
| static struct cp_abi_ops *find_cp_abi (const char *short_name); |
| |
| static struct cp_abi_ops current_cp_abi = { "", NULL }; |
| static struct cp_abi_ops auto_cp_abi = { "auto", NULL }; |
| |
| #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")); |
| return (*current_cp_abi.is_constructor_name) (name); |
| } |
| |
| enum dtor_kinds |
| is_destructor_name (const char *name) |
| { |
| if ((current_cp_abi.is_destructor_name) == NULL) |
| error (_("ABI doesn't define required function is_destructor_name")); |
| return (*current_cp_abi.is_destructor_name) (name); |
| } |
| |
| int |
| is_vtable_name (const char *name) |
| { |
| if ((current_cp_abi.is_vtable_name) == NULL) |
| error (_("ABI doesn't define required function is_vtable_name")); |
| return (*current_cp_abi.is_vtable_name) (name); |
| } |
| |
| int |
| is_operator_name (const char *name) |
| { |
| if ((current_cp_abi.is_operator_name) == NULL) |
| error (_("ABI doesn't define required function is_operator_name")); |
| return (*current_cp_abi.is_operator_name) (name); |
| } |
| |
| 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); |
| } |
| |
| struct type * |
| value_rtti_type (struct value *v, int *full, |
| LONGEST *top, int *using_enc) |
| { |
| struct type *ret = NULL; |
| |
| if ((current_cp_abi.rtti_type) == NULL |
| || !HAVE_CPLUS_STRUCT (check_typedef (v->type ()))) |
| return NULL; |
| 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 |
| cplus_method_ptr_size (struct type *to_type) |
| { |
| 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); |
| } |
| |
| 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 (const frame_info_ptr &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); |
| } |
| |
| /* See cp-abi.h. */ |
| |
| struct language_pass_by_ref_info |
| cp_pass_by_reference (struct type *type) |
| { |
| if ((current_cp_abi.pass_by_reference) == NULL) |
| return {}; |
| 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 (_("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) |
| { |
| struct cp_abi_ops *abi = find_cp_abi (short_name); |
| |
| if (abi == NULL) |
| internal_error (_("Cannot find C++ ABI \"%s\" to set it as auto default."), |
| short_name); |
| |
| xfree ((char *) auto_cp_abi.longname); |
| xfree ((char *) auto_cp_abi.doc); |
| |
| auto_cp_abi = *abi; |
| |
| auto_cp_abi.shortname = "auto"; |
| auto_cp_abi.longname = xstrprintf ("currently \"%s\"", |
| abi->shortname).release (); |
| auto_cp_abi.doc = xstrprintf ("Automatically selected; currently \"%s\"", |
| abi->shortname).release (); |
| |
| /* 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) |
| 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 |
| _initialize_cp_abi () |
| { |
| 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); |
| } |