1 /* Generic code for supporting multiple C++ ABI's
3 Copyright (C) 2001-2015 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 static struct cp_abi_ops *find_cp_abi (const char *short_name);
28 static struct cp_abi_ops current_cp_abi = { "", NULL };
29 static struct cp_abi_ops auto_cp_abi = { "auto", NULL };
32 static struct cp_abi_ops *cp_abis[CP_ABI_MAX];
33 static int num_cp_abis = 0;
36 is_constructor_name (const char *name)
38 if ((current_cp_abi.is_constructor_name) == NULL)
39 error (_("ABI doesn't define required function is_constructor_name"));
40 return (*current_cp_abi.is_constructor_name) (name);
44 is_destructor_name (const char *name)
46 if ((current_cp_abi.is_destructor_name) == NULL)
47 error (_("ABI doesn't define required function is_destructor_name"));
48 return (*current_cp_abi.is_destructor_name) (name);
52 is_vtable_name (const char *name)
54 if ((current_cp_abi.is_vtable_name) == NULL)
55 error (_("ABI doesn't define required function is_vtable_name"));
56 return (*current_cp_abi.is_vtable_name) (name);
60 is_operator_name (const char *name)
62 if ((current_cp_abi.is_operator_name) == NULL)
63 error (_("ABI doesn't define required function is_operator_name"));
64 return (*current_cp_abi.is_operator_name) (name);
68 baseclass_offset (struct type *type, int index, const gdb_byte *valaddr,
69 int embedded_offset, CORE_ADDR address,
70 const struct value *val)
72 volatile struct gdb_exception ex;
75 gdb_assert (current_cp_abi.baseclass_offset != NULL);
77 TRY_CATCH (ex, RETURN_MASK_ERROR)
79 res = (*current_cp_abi.baseclass_offset) (type, index, valaddr,
85 if (ex.error != NOT_AVAILABLE_ERROR)
88 throw_error (NOT_AVAILABLE_ERROR,
89 _("Cannot determine virtual baseclass offset "
90 "of incomplete object"));
97 value_virtual_fn_field (struct value **arg1p,
98 struct fn_field *f, int j,
99 struct type *type, int offset)
101 if ((current_cp_abi.virtual_fn_field) == NULL)
103 return (*current_cp_abi.virtual_fn_field) (arg1p, f, j,
108 value_rtti_type (struct value *v, int *full,
109 int *top, int *using_enc)
111 struct type *ret = NULL;
112 volatile struct gdb_exception e;
114 if ((current_cp_abi.rtti_type) == NULL)
116 TRY_CATCH (e, RETURN_MASK_ERROR)
118 ret = (*current_cp_abi.rtti_type) (v, full, top, using_enc);
126 cplus_print_method_ptr (const gdb_byte *contents,
128 struct ui_file *stream)
130 if (current_cp_abi.print_method_ptr == NULL)
131 error (_("GDB does not support pointers to methods on this target"));
132 (*current_cp_abi.print_method_ptr) (contents, type, stream);
136 cplus_method_ptr_size (struct type *to_type)
138 if (current_cp_abi.method_ptr_size == NULL)
139 error (_("GDB does not support pointers to methods on this target"));
140 return (*current_cp_abi.method_ptr_size) (to_type);
144 cplus_make_method_ptr (struct type *type, gdb_byte *contents,
145 CORE_ADDR value, int is_virtual)
147 if (current_cp_abi.make_method_ptr == NULL)
148 error (_("GDB does not support pointers to methods on this target"));
149 (*current_cp_abi.make_method_ptr) (type, contents, value, is_virtual);
153 cplus_skip_trampoline (struct frame_info *frame,
156 if (current_cp_abi.skip_trampoline == NULL)
158 return (*current_cp_abi.skip_trampoline) (frame, stop_pc);
162 cplus_method_ptr_to_value (struct value **this_p,
163 struct value *method_ptr)
165 if (current_cp_abi.method_ptr_to_value == NULL)
166 error (_("GDB does not support pointers to methods on this target"));
167 return (*current_cp_abi.method_ptr_to_value) (this_p, method_ptr);
173 cplus_print_vtable (struct value *value)
175 if (current_cp_abi.print_vtable == NULL)
176 error (_("GDB cannot print the vtable on this target"));
177 (*current_cp_abi.print_vtable) (value);
183 cplus_typeid (struct value *value)
185 if (current_cp_abi.get_typeid == NULL)
186 error (_("GDB cannot find the typeid on this target"));
187 return (*current_cp_abi.get_typeid) (value);
193 cplus_typeid_type (struct gdbarch *gdbarch)
195 if (current_cp_abi.get_typeid_type == NULL)
196 error (_("GDB cannot find the type for 'typeid' on this target"));
197 return (*current_cp_abi.get_typeid_type) (gdbarch);
203 cplus_type_from_type_info (struct value *value)
205 if (current_cp_abi.get_type_from_type_info == NULL)
206 error (_("GDB cannot find the type from a std::type_info on this target"));
207 return (*current_cp_abi.get_type_from_type_info) (value);
213 cplus_typename_from_type_info (struct value *value)
215 if (current_cp_abi.get_typename_from_type_info == NULL)
216 error (_("GDB cannot find the type name "
217 "from a std::type_info on this target"));
218 return (*current_cp_abi.get_typename_from_type_info) (value);
222 cp_pass_by_reference (struct type *type)
224 if ((current_cp_abi.pass_by_reference) == NULL)
226 return (*current_cp_abi.pass_by_reference) (type);
229 /* Set the current C++ ABI to SHORT_NAME. */
232 switch_to_cp_abi (const char *short_name)
234 struct cp_abi_ops *abi;
236 abi = find_cp_abi (short_name);
240 current_cp_abi = *abi;
244 /* Add ABI to the list of supported C++ ABI's. */
247 register_cp_abi (struct cp_abi_ops *abi)
249 if (num_cp_abis == CP_ABI_MAX)
250 internal_error (__FILE__, __LINE__,
251 _("Too many C++ ABIs, please increase "
252 "CP_ABI_MAX in cp-abi.c"));
254 cp_abis[num_cp_abis++] = abi;
259 /* Set the ABI to use in "auto" mode to SHORT_NAME. */
262 set_cp_abi_as_auto_default (const char *short_name)
264 char *new_longname, *new_doc;
265 struct cp_abi_ops *abi = find_cp_abi (short_name);
268 internal_error (__FILE__, __LINE__,
269 _("Cannot find C++ ABI \"%s\" to set it as auto default."),
272 if (auto_cp_abi.longname != NULL)
273 xfree ((char *) auto_cp_abi.longname);
274 if (auto_cp_abi.doc != NULL)
275 xfree ((char *) auto_cp_abi.doc);
279 auto_cp_abi.shortname = "auto";
280 new_longname = xstrprintf ("currently \"%s\"", abi->shortname);
281 auto_cp_abi.longname = new_longname;
283 new_doc = xstrprintf ("Automatically selected; currently \"%s\"",
285 auto_cp_abi.doc = new_doc;
287 /* Since we copy the current ABI into current_cp_abi instead of
288 using a pointer, if auto is currently the default, we need to
290 if (strcmp (current_cp_abi.shortname, "auto") == 0)
291 switch_to_cp_abi ("auto");
294 /* Return the ABI operations associated with SHORT_NAME. */
296 static struct cp_abi_ops *
297 find_cp_abi (const char *short_name)
301 for (i = 0; i < num_cp_abis; i++)
302 if (strcmp (cp_abis[i]->shortname, short_name) == 0)
308 /* Display the list of registered C++ ABIs. */
311 list_cp_abis (int from_tty)
313 struct ui_out *uiout = current_uiout;
314 struct cleanup *cleanup_chain;
317 ui_out_text (uiout, "The available C++ ABIs are:\n");
318 cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout,
320 for (i = 0; i < num_cp_abis; i++)
325 ui_out_text (uiout, " ");
326 ui_out_field_string (uiout, "cp-abi", cp_abis[i]->shortname);
328 padcount = 16 - 2 - strlen (cp_abis[i]->shortname);
331 pad[--padcount] = ' ';
332 ui_out_text (uiout, pad);
334 ui_out_field_string (uiout, "doc", cp_abis[i]->doc);
335 ui_out_text (uiout, "\n");
337 do_cleanups (cleanup_chain);
340 /* Set the current C++ ABI, or display the list of options if no
341 argument is given. */
344 set_cp_abi_cmd (char *args, int from_tty)
348 list_cp_abis (from_tty);
352 if (!switch_to_cp_abi (args))
353 error (_("Could not find \"%s\" in ABI list"), args);
356 /* A completion function for "set cp-abi". */
358 static VEC (char_ptr) *
359 cp_abi_completer (struct cmd_list_element *ignore,
360 const char *text, const char *word)
362 static const char **cp_abi_names;
364 if (cp_abi_names == NULL)
368 cp_abi_names = XNEWVEC (const char *, num_cp_abis + 1);
369 for (i = 0; i < num_cp_abis; ++i)
370 cp_abi_names[i] = cp_abis[i]->shortname;
371 cp_abi_names[i] = NULL;
374 return complete_on_enum (cp_abi_names, text, word);
377 /* Show the currently selected C++ ABI. */
380 show_cp_abi_cmd (char *args, int from_tty)
382 struct ui_out *uiout = current_uiout;
384 ui_out_text (uiout, "The currently selected C++ ABI is \"");
386 ui_out_field_string (uiout, "cp-abi", current_cp_abi.shortname);
387 ui_out_text (uiout, "\" (");
388 ui_out_field_string (uiout, "longname", current_cp_abi.longname);
389 ui_out_text (uiout, ").\n");
392 extern initialize_file_ftype _initialize_cp_abi; /* -Wmissing-prototypes */
395 _initialize_cp_abi (void)
397 struct cmd_list_element *c;
399 register_cp_abi (&auto_cp_abi);
400 switch_to_cp_abi ("auto");
402 c = add_cmd ("cp-abi", class_obscure, set_cp_abi_cmd, _("\
403 Set the ABI used for inspecting C++ objects.\n\
404 \"set cp-abi\" with no arguments will list the available ABIs."),
406 set_cmd_completer (c, cp_abi_completer);
408 add_cmd ("cp-abi", class_obscure, show_cp_abi_cmd,
409 _("Show the ABI used for inspecting C++ objects."),