1 /* Generic code for supporting multiple C++ ABI's
3 Copyright (C) 2001-2014 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,
84 if (ex.reason < 0 && ex.error == NOT_AVAILABLE_ERROR)
85 throw_error (NOT_AVAILABLE_ERROR,
86 _("Cannot determine virtual baseclass offset "
87 "of incomplete object"));
88 else if (ex.reason < 0)
95 value_virtual_fn_field (struct value **arg1p,
96 struct fn_field *f, int j,
97 struct type *type, int offset)
99 if ((current_cp_abi.virtual_fn_field) == NULL)
101 return (*current_cp_abi.virtual_fn_field) (arg1p, f, j,
106 value_rtti_type (struct value *v, int *full,
107 int *top, int *using_enc)
109 struct type *ret = NULL;
110 volatile struct gdb_exception e;
112 if ((current_cp_abi.rtti_type) == NULL)
114 TRY_CATCH (e, RETURN_MASK_ERROR)
116 ret = (*current_cp_abi.rtti_type) (v, full, top, using_enc);
124 cplus_print_method_ptr (const gdb_byte *contents,
126 struct ui_file *stream)
128 if (current_cp_abi.print_method_ptr == NULL)
129 error (_("GDB does not support pointers to methods on this target"));
130 (*current_cp_abi.print_method_ptr) (contents, type, stream);
134 cplus_method_ptr_size (struct type *to_type)
136 if (current_cp_abi.method_ptr_size == NULL)
137 error (_("GDB does not support pointers to methods on this target"));
138 return (*current_cp_abi.method_ptr_size) (to_type);
142 cplus_make_method_ptr (struct type *type, gdb_byte *contents,
143 CORE_ADDR value, int is_virtual)
145 if (current_cp_abi.make_method_ptr == NULL)
146 error (_("GDB does not support pointers to methods on this target"));
147 (*current_cp_abi.make_method_ptr) (type, contents, value, is_virtual);
151 cplus_skip_trampoline (struct frame_info *frame,
154 if (current_cp_abi.skip_trampoline == NULL)
156 return (*current_cp_abi.skip_trampoline) (frame, stop_pc);
160 cplus_method_ptr_to_value (struct value **this_p,
161 struct value *method_ptr)
163 if (current_cp_abi.method_ptr_to_value == NULL)
164 error (_("GDB does not support pointers to methods on this target"));
165 return (*current_cp_abi.method_ptr_to_value) (this_p, method_ptr);
171 cplus_print_vtable (struct value *value)
173 if (current_cp_abi.print_vtable == NULL)
174 error (_("GDB cannot print the vtable on this target"));
175 (*current_cp_abi.print_vtable) (value);
181 cplus_typeid (struct value *value)
183 if (current_cp_abi.get_typeid == NULL)
184 error (_("GDB cannot find the typeid on this target"));
185 return (*current_cp_abi.get_typeid) (value);
191 cplus_typeid_type (struct gdbarch *gdbarch)
193 if (current_cp_abi.get_typeid_type == NULL)
194 error (_("GDB cannot find the type for 'typeid' on this target"));
195 return (*current_cp_abi.get_typeid_type) (gdbarch);
201 cplus_type_from_type_info (struct value *value)
203 if (current_cp_abi.get_type_from_type_info == NULL)
204 error (_("GDB cannot find the type from a std::type_info on this target"));
205 return (*current_cp_abi.get_type_from_type_info) (value);
211 cplus_typename_from_type_info (struct value *value)
213 if (current_cp_abi.get_typename_from_type_info == NULL)
214 error (_("GDB cannot find the type name "
215 "from a std::type_info on this target"));
216 return (*current_cp_abi.get_typename_from_type_info) (value);
220 cp_pass_by_reference (struct type *type)
222 if ((current_cp_abi.pass_by_reference) == NULL)
224 return (*current_cp_abi.pass_by_reference) (type);
227 /* Set the current C++ ABI to SHORT_NAME. */
230 switch_to_cp_abi (const char *short_name)
232 struct cp_abi_ops *abi;
234 abi = find_cp_abi (short_name);
238 current_cp_abi = *abi;
242 /* Add ABI to the list of supported C++ ABI's. */
245 register_cp_abi (struct cp_abi_ops *abi)
247 if (num_cp_abis == CP_ABI_MAX)
248 internal_error (__FILE__, __LINE__,
249 _("Too many C++ ABIs, please increase "
250 "CP_ABI_MAX in cp-abi.c"));
252 cp_abis[num_cp_abis++] = abi;
257 /* Set the ABI to use in "auto" mode to SHORT_NAME. */
260 set_cp_abi_as_auto_default (const char *short_name)
262 char *new_longname, *new_doc;
263 struct cp_abi_ops *abi = find_cp_abi (short_name);
266 internal_error (__FILE__, __LINE__,
267 _("Cannot find C++ ABI \"%s\" to set it as auto default."),
270 if (auto_cp_abi.longname != NULL)
271 xfree ((char *) auto_cp_abi.longname);
272 if (auto_cp_abi.doc != NULL)
273 xfree ((char *) auto_cp_abi.doc);
277 auto_cp_abi.shortname = "auto";
278 new_longname = xstrprintf ("currently \"%s\"", abi->shortname);
279 auto_cp_abi.longname = new_longname;
281 new_doc = xstrprintf ("Automatically selected; currently \"%s\"",
283 auto_cp_abi.doc = new_doc;
285 /* Since we copy the current ABI into current_cp_abi instead of
286 using a pointer, if auto is currently the default, we need to
288 if (strcmp (current_cp_abi.shortname, "auto") == 0)
289 switch_to_cp_abi ("auto");
292 /* Return the ABI operations associated with SHORT_NAME. */
294 static struct cp_abi_ops *
295 find_cp_abi (const char *short_name)
299 for (i = 0; i < num_cp_abis; i++)
300 if (strcmp (cp_abis[i]->shortname, short_name) == 0)
306 /* Display the list of registered C++ ABIs. */
309 list_cp_abis (int from_tty)
311 struct ui_out *uiout = current_uiout;
312 struct cleanup *cleanup_chain;
315 ui_out_text (uiout, "The available C++ ABIs are:\n");
316 cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout,
318 for (i = 0; i < num_cp_abis; i++)
323 ui_out_text (uiout, " ");
324 ui_out_field_string (uiout, "cp-abi", cp_abis[i]->shortname);
326 padcount = 16 - 2 - strlen (cp_abis[i]->shortname);
329 pad[--padcount] = ' ';
330 ui_out_text (uiout, pad);
332 ui_out_field_string (uiout, "doc", cp_abis[i]->doc);
333 ui_out_text (uiout, "\n");
335 do_cleanups (cleanup_chain);
338 /* Set the current C++ ABI, or display the list of options if no
339 argument is given. */
342 set_cp_abi_cmd (char *args, int from_tty)
346 list_cp_abis (from_tty);
350 if (!switch_to_cp_abi (args))
351 error (_("Could not find \"%s\" in ABI list"), args);
354 /* A completion function for "set cp-abi". */
356 static VEC (char_ptr) *
357 cp_abi_completer (struct cmd_list_element *ignore,
358 const char *text, const char *word)
360 static const char **cp_abi_names;
362 if (cp_abi_names == NULL)
366 cp_abi_names = XNEWVEC (const char *, num_cp_abis + 1);
367 for (i = 0; i < num_cp_abis; ++i)
368 cp_abi_names[i] = cp_abis[i]->shortname;
369 cp_abi_names[i] = NULL;
372 return complete_on_enum (cp_abi_names, text, word);
375 /* Show the currently selected C++ ABI. */
378 show_cp_abi_cmd (char *args, int from_tty)
380 struct ui_out *uiout = current_uiout;
382 ui_out_text (uiout, "The currently selected C++ ABI is \"");
384 ui_out_field_string (uiout, "cp-abi", current_cp_abi.shortname);
385 ui_out_text (uiout, "\" (");
386 ui_out_field_string (uiout, "longname", current_cp_abi.longname);
387 ui_out_text (uiout, ").\n");
390 extern initialize_file_ftype _initialize_cp_abi; /* -Wmissing-prototypes */
393 _initialize_cp_abi (void)
395 struct cmd_list_element *c;
397 register_cp_abi (&auto_cp_abi);
398 switch_to_cp_abi ("auto");
400 c = add_cmd ("cp-abi", class_obscure, set_cp_abi_cmd, _("\
401 Set the ABI used for inspecting C++ objects.\n\
402 \"set cp-abi\" with no arguments will list the available ABIs."),
404 set_cmd_completer (c, cp_abi_completer);
406 add_cmd ("cp-abi", class_obscure, show_cp_abi_cmd,
407 _("Show the ABI used for inspecting C++ objects."),