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/>. */
24 #include "exceptions.h"
27 static struct cp_abi_ops *find_cp_abi (const char *short_name);
29 static struct cp_abi_ops current_cp_abi = { "", NULL };
30 static struct cp_abi_ops auto_cp_abi = { "auto", NULL };
33 static struct cp_abi_ops *cp_abis[CP_ABI_MAX];
34 static int num_cp_abis = 0;
37 is_constructor_name (const char *name)
39 if ((current_cp_abi.is_constructor_name) == NULL)
40 error (_("ABI doesn't define required function is_constructor_name"));
41 return (*current_cp_abi.is_constructor_name) (name);
45 is_destructor_name (const char *name)
47 if ((current_cp_abi.is_destructor_name) == NULL)
48 error (_("ABI doesn't define required function is_destructor_name"));
49 return (*current_cp_abi.is_destructor_name) (name);
53 is_vtable_name (const char *name)
55 if ((current_cp_abi.is_vtable_name) == NULL)
56 error (_("ABI doesn't define required function is_vtable_name"));
57 return (*current_cp_abi.is_vtable_name) (name);
61 is_operator_name (const char *name)
63 if ((current_cp_abi.is_operator_name) == NULL)
64 error (_("ABI doesn't define required function is_operator_name"));
65 return (*current_cp_abi.is_operator_name) (name);
69 baseclass_offset (struct type *type, int index, const gdb_byte *valaddr,
70 int embedded_offset, CORE_ADDR address,
71 const struct value *val)
73 volatile struct gdb_exception ex;
76 gdb_assert (current_cp_abi.baseclass_offset != NULL);
78 TRY_CATCH (ex, RETURN_MASK_ERROR)
80 res = (*current_cp_abi.baseclass_offset) (type, index, valaddr,
85 if (ex.reason < 0 && ex.error == NOT_AVAILABLE_ERROR)
86 throw_error (NOT_AVAILABLE_ERROR,
87 _("Cannot determine virtual baseclass offset "
88 "of incomplete object"));
89 else if (ex.reason < 0)
96 value_virtual_fn_field (struct value **arg1p,
97 struct fn_field *f, int j,
98 struct type *type, int offset)
100 if ((current_cp_abi.virtual_fn_field) == NULL)
102 return (*current_cp_abi.virtual_fn_field) (arg1p, f, j,
107 value_rtti_type (struct value *v, int *full,
108 int *top, int *using_enc)
110 struct type *ret = NULL;
111 volatile struct gdb_exception e;
113 if ((current_cp_abi.rtti_type) == NULL)
115 TRY_CATCH (e, RETURN_MASK_ERROR)
117 ret = (*current_cp_abi.rtti_type) (v, full, top, using_enc);
125 cplus_print_method_ptr (const gdb_byte *contents,
127 struct ui_file *stream)
129 if (current_cp_abi.print_method_ptr == NULL)
130 error (_("GDB does not support pointers to methods on this target"));
131 (*current_cp_abi.print_method_ptr) (contents, type, stream);
135 cplus_method_ptr_size (struct type *to_type)
137 if (current_cp_abi.method_ptr_size == NULL)
138 error (_("GDB does not support pointers to methods on this target"));
139 return (*current_cp_abi.method_ptr_size) (to_type);
143 cplus_make_method_ptr (struct type *type, gdb_byte *contents,
144 CORE_ADDR value, int is_virtual)
146 if (current_cp_abi.make_method_ptr == NULL)
147 error (_("GDB does not support pointers to methods on this target"));
148 (*current_cp_abi.make_method_ptr) (type, contents, value, is_virtual);
152 cplus_skip_trampoline (struct frame_info *frame,
155 if (current_cp_abi.skip_trampoline == NULL)
157 return (*current_cp_abi.skip_trampoline) (frame, stop_pc);
161 cplus_method_ptr_to_value (struct value **this_p,
162 struct value *method_ptr)
164 if (current_cp_abi.method_ptr_to_value == NULL)
165 error (_("GDB does not support pointers to methods on this target"));
166 return (*current_cp_abi.method_ptr_to_value) (this_p, method_ptr);
172 cplus_print_vtable (struct value *value)
174 if (current_cp_abi.print_vtable == NULL)
175 error (_("GDB cannot print the vtable on this target"));
176 (*current_cp_abi.print_vtable) (value);
182 cplus_typeid (struct value *value)
184 if (current_cp_abi.get_typeid == NULL)
185 error (_("GDB cannot find the typeid on this target"));
186 return (*current_cp_abi.get_typeid) (value);
192 cplus_typeid_type (struct gdbarch *gdbarch)
194 if (current_cp_abi.get_typeid_type == NULL)
195 error (_("GDB cannot find the type for 'typeid' on this target"));
196 return (*current_cp_abi.get_typeid_type) (gdbarch);
202 cplus_type_from_type_info (struct value *value)
204 if (current_cp_abi.get_type_from_type_info == NULL)
205 error (_("GDB cannot find the type from a std::type_info on this target"));
206 return (*current_cp_abi.get_type_from_type_info) (value);
212 cplus_typename_from_type_info (struct value *value)
214 if (current_cp_abi.get_typename_from_type_info == NULL)
215 error (_("GDB cannot find the type name "
216 "from a std::type_info on this target"));
217 return (*current_cp_abi.get_typename_from_type_info) (value);
221 cp_pass_by_reference (struct type *type)
223 if ((current_cp_abi.pass_by_reference) == NULL)
225 return (*current_cp_abi.pass_by_reference) (type);
228 /* Set the current C++ ABI to SHORT_NAME. */
231 switch_to_cp_abi (const char *short_name)
233 struct cp_abi_ops *abi;
235 abi = find_cp_abi (short_name);
239 current_cp_abi = *abi;
243 /* Add ABI to the list of supported C++ ABI's. */
246 register_cp_abi (struct cp_abi_ops *abi)
248 if (num_cp_abis == CP_ABI_MAX)
249 internal_error (__FILE__, __LINE__,
250 _("Too many C++ ABIs, please increase "
251 "CP_ABI_MAX in cp-abi.c"));
253 cp_abis[num_cp_abis++] = abi;
258 /* Set the ABI to use in "auto" mode to SHORT_NAME. */
261 set_cp_abi_as_auto_default (const char *short_name)
263 char *new_longname, *new_doc;
264 struct cp_abi_ops *abi = find_cp_abi (short_name);
267 internal_error (__FILE__, __LINE__,
268 _("Cannot find C++ ABI \"%s\" to set it as auto default."),
271 if (auto_cp_abi.longname != NULL)
272 xfree ((char *) auto_cp_abi.longname);
273 if (auto_cp_abi.doc != NULL)
274 xfree ((char *) auto_cp_abi.doc);
278 auto_cp_abi.shortname = "auto";
279 new_longname = xstrprintf ("currently \"%s\"", abi->shortname);
280 auto_cp_abi.longname = new_longname;
282 new_doc = xstrprintf ("Automatically selected; currently \"%s\"",
284 auto_cp_abi.doc = new_doc;
286 /* Since we copy the current ABI into current_cp_abi instead of
287 using a pointer, if auto is currently the default, we need to
289 if (strcmp (current_cp_abi.shortname, "auto") == 0)
290 switch_to_cp_abi ("auto");
293 /* Return the ABI operations associated with SHORT_NAME. */
295 static struct cp_abi_ops *
296 find_cp_abi (const char *short_name)
300 for (i = 0; i < num_cp_abis; i++)
301 if (strcmp (cp_abis[i]->shortname, short_name) == 0)
307 /* Display the list of registered C++ ABIs. */
310 list_cp_abis (int from_tty)
312 struct ui_out *uiout = current_uiout;
313 struct cleanup *cleanup_chain;
316 ui_out_text (uiout, "The available C++ ABIs are:\n");
317 cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout,
319 for (i = 0; i < num_cp_abis; i++)
324 ui_out_text (uiout, " ");
325 ui_out_field_string (uiout, "cp-abi", cp_abis[i]->shortname);
327 padcount = 16 - 2 - strlen (cp_abis[i]->shortname);
330 pad[--padcount] = ' ';
331 ui_out_text (uiout, pad);
333 ui_out_field_string (uiout, "doc", cp_abis[i]->doc);
334 ui_out_text (uiout, "\n");
336 do_cleanups (cleanup_chain);
339 /* Set the current C++ ABI, or display the list of options if no
340 argument is given. */
343 set_cp_abi_cmd (char *args, int from_tty)
347 list_cp_abis (from_tty);
351 if (!switch_to_cp_abi (args))
352 error (_("Could not find \"%s\" in ABI list"), args);
355 /* A completion function for "set cp-abi". */
357 static VEC (char_ptr) *
358 cp_abi_completer (struct cmd_list_element *ignore,
359 const char *text, const char *word)
361 static const char **cp_abi_names;
363 if (cp_abi_names == NULL)
367 cp_abi_names = XNEWVEC (const char *, num_cp_abis + 1);
368 for (i = 0; i < num_cp_abis; ++i)
369 cp_abi_names[i] = cp_abis[i]->shortname;
370 cp_abi_names[i] = NULL;
373 return complete_on_enum (cp_abi_names, text, word);
376 /* Show the currently selected C++ ABI. */
379 show_cp_abi_cmd (char *args, int from_tty)
381 struct ui_out *uiout = current_uiout;
383 ui_out_text (uiout, "The currently selected C++ ABI is \"");
385 ui_out_field_string (uiout, "cp-abi", current_cp_abi.shortname);
386 ui_out_text (uiout, "\" (");
387 ui_out_field_string (uiout, "longname", current_cp_abi.longname);
388 ui_out_text (uiout, ").\n");
391 extern initialize_file_ftype _initialize_cp_abi; /* -Wmissing-prototypes */
394 _initialize_cp_abi (void)
396 struct cmd_list_element *c;
398 register_cp_abi (&auto_cp_abi);
399 switch_to_cp_abi ("auto");
401 c = add_cmd ("cp-abi", class_obscure, set_cp_abi_cmd, _("\
402 Set the ABI used for inspecting C++ objects.\n\
403 \"set cp-abi\" with no arguments will list the available ABIs."),
405 set_cmd_completer (c, cp_abi_completer);
407 add_cmd ("cp-abi", class_obscure, show_cp_abi_cmd,
408 _("Show the ABI used for inspecting C++ objects."),