1 /* Generic code for supporting multiple C++ ABI's
3 Copyright (C) 2001-2013 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 #include "gdb_assert.h"
28 #include "gdb_string.h"
30 static struct cp_abi_ops *find_cp_abi (const char *short_name);
32 static struct cp_abi_ops current_cp_abi = { "", NULL };
33 static struct cp_abi_ops auto_cp_abi = { "auto", NULL };
36 static struct cp_abi_ops *cp_abis[CP_ABI_MAX];
37 static int num_cp_abis = 0;
40 is_constructor_name (const char *name)
42 if ((current_cp_abi.is_constructor_name) == NULL)
43 error (_("ABI doesn't define required function is_constructor_name"));
44 return (*current_cp_abi.is_constructor_name) (name);
48 is_destructor_name (const char *name)
50 if ((current_cp_abi.is_destructor_name) == NULL)
51 error (_("ABI doesn't define required function is_destructor_name"));
52 return (*current_cp_abi.is_destructor_name) (name);
56 is_vtable_name (const char *name)
58 if ((current_cp_abi.is_vtable_name) == NULL)
59 error (_("ABI doesn't define required function is_vtable_name"));
60 return (*current_cp_abi.is_vtable_name) (name);
64 is_operator_name (const char *name)
66 if ((current_cp_abi.is_operator_name) == NULL)
67 error (_("ABI doesn't define required function is_operator_name"));
68 return (*current_cp_abi.is_operator_name) (name);
72 baseclass_offset (struct type *type, int index, const gdb_byte *valaddr,
73 int embedded_offset, CORE_ADDR address,
74 const struct value *val)
76 volatile struct gdb_exception ex;
79 gdb_assert (current_cp_abi.baseclass_offset != NULL);
81 TRY_CATCH (ex, RETURN_MASK_ERROR)
83 res = (*current_cp_abi.baseclass_offset) (type, index, valaddr,
88 if (ex.reason < 0 && ex.error == NOT_AVAILABLE_ERROR)
89 throw_error (NOT_AVAILABLE_ERROR,
90 _("Cannot determine virtual baseclass offset "
91 "of incomplete object"));
92 else if (ex.reason < 0)
99 value_virtual_fn_field (struct value **arg1p,
100 struct fn_field *f, int j,
101 struct type *type, int offset)
103 if ((current_cp_abi.virtual_fn_field) == NULL)
105 return (*current_cp_abi.virtual_fn_field) (arg1p, f, j,
110 value_rtti_type (struct value *v, int *full,
111 int *top, int *using_enc)
113 struct type *ret = NULL;
114 volatile struct gdb_exception e;
116 if ((current_cp_abi.rtti_type) == NULL)
118 TRY_CATCH (e, RETURN_MASK_ERROR)
120 ret = (*current_cp_abi.rtti_type) (v, full, top, using_enc);
128 cplus_print_method_ptr (const gdb_byte *contents,
130 struct ui_file *stream)
132 if (current_cp_abi.print_method_ptr == NULL)
133 error (_("GDB does not support pointers to methods on this target"));
134 (*current_cp_abi.print_method_ptr) (contents, type, stream);
138 cplus_method_ptr_size (struct type *to_type)
140 if (current_cp_abi.method_ptr_size == NULL)
141 error (_("GDB does not support pointers to methods on this target"));
142 return (*current_cp_abi.method_ptr_size) (to_type);
146 cplus_make_method_ptr (struct type *type, gdb_byte *contents,
147 CORE_ADDR value, int is_virtual)
149 if (current_cp_abi.make_method_ptr == NULL)
150 error (_("GDB does not support pointers to methods on this target"));
151 (*current_cp_abi.make_method_ptr) (type, contents, value, is_virtual);
155 cplus_skip_trampoline (struct frame_info *frame,
158 if (current_cp_abi.skip_trampoline == NULL)
160 return (*current_cp_abi.skip_trampoline) (frame, stop_pc);
164 cplus_method_ptr_to_value (struct value **this_p,
165 struct value *method_ptr)
167 if (current_cp_abi.method_ptr_to_value == NULL)
168 error (_("GDB does not support pointers to methods on this target"));
169 return (*current_cp_abi.method_ptr_to_value) (this_p, method_ptr);
175 cplus_print_vtable (struct value *value)
177 if (current_cp_abi.print_vtable == NULL)
178 error (_("GDB cannot print the vtable on this target"));
179 (*current_cp_abi.print_vtable) (value);
185 cplus_typeid (struct value *value)
187 if (current_cp_abi.get_typeid == NULL)
188 error (_("GDB cannot find the typeid on this target"));
189 return (*current_cp_abi.get_typeid) (value);
195 cplus_typeid_type (struct gdbarch *gdbarch)
197 if (current_cp_abi.get_typeid_type == NULL)
198 error (_("GDB cannot find the type for 'typeid' on this target"));
199 return (*current_cp_abi.get_typeid_type) (gdbarch);
205 cplus_type_from_type_info (struct value *value)
207 if (current_cp_abi.get_type_from_type_info == NULL)
208 error (_("GDB cannot find the type from a std::type_info on this target"));
209 return (*current_cp_abi.get_type_from_type_info) (value);
213 cp_pass_by_reference (struct type *type)
215 if ((current_cp_abi.pass_by_reference) == NULL)
217 return (*current_cp_abi.pass_by_reference) (type);
220 /* Set the current C++ ABI to SHORT_NAME. */
223 switch_to_cp_abi (const char *short_name)
225 struct cp_abi_ops *abi;
227 abi = find_cp_abi (short_name);
231 current_cp_abi = *abi;
235 /* Add ABI to the list of supported C++ ABI's. */
238 register_cp_abi (struct cp_abi_ops *abi)
240 if (num_cp_abis == CP_ABI_MAX)
241 internal_error (__FILE__, __LINE__,
242 _("Too many C++ ABIs, please increase "
243 "CP_ABI_MAX in cp-abi.c"));
245 cp_abis[num_cp_abis++] = abi;
250 /* Set the ABI to use in "auto" mode to SHORT_NAME. */
253 set_cp_abi_as_auto_default (const char *short_name)
255 char *new_longname, *new_doc;
256 struct cp_abi_ops *abi = find_cp_abi (short_name);
259 internal_error (__FILE__, __LINE__,
260 _("Cannot find C++ ABI \"%s\" to set it as auto default."),
263 if (auto_cp_abi.longname != NULL)
264 xfree ((char *) auto_cp_abi.longname);
265 if (auto_cp_abi.doc != NULL)
266 xfree ((char *) auto_cp_abi.doc);
270 auto_cp_abi.shortname = "auto";
271 new_longname = xstrprintf ("currently \"%s\"", abi->shortname);
272 auto_cp_abi.longname = new_longname;
274 new_doc = xstrprintf ("Automatically selected; currently \"%s\"",
276 auto_cp_abi.doc = new_doc;
278 /* Since we copy the current ABI into current_cp_abi instead of
279 using a pointer, if auto is currently the default, we need to
281 if (strcmp (current_cp_abi.shortname, "auto") == 0)
282 switch_to_cp_abi ("auto");
285 /* Return the ABI operations associated with SHORT_NAME. */
287 static struct cp_abi_ops *
288 find_cp_abi (const char *short_name)
292 for (i = 0; i < num_cp_abis; i++)
293 if (strcmp (cp_abis[i]->shortname, short_name) == 0)
299 /* Display the list of registered C++ ABIs. */
302 list_cp_abis (int from_tty)
304 struct ui_out *uiout = current_uiout;
305 struct cleanup *cleanup_chain;
308 ui_out_text (uiout, "The available C++ ABIs are:\n");
309 cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout,
311 for (i = 0; i < num_cp_abis; i++)
316 ui_out_text (uiout, " ");
317 ui_out_field_string (uiout, "cp-abi", cp_abis[i]->shortname);
319 padcount = 16 - 2 - strlen (cp_abis[i]->shortname);
322 pad[--padcount] = ' ';
323 ui_out_text (uiout, pad);
325 ui_out_field_string (uiout, "doc", cp_abis[i]->doc);
326 ui_out_text (uiout, "\n");
328 do_cleanups (cleanup_chain);
331 /* Set the current C++ ABI, or display the list of options if no
332 argument is given. */
335 set_cp_abi_cmd (char *args, int from_tty)
339 list_cp_abis (from_tty);
343 if (!switch_to_cp_abi (args))
344 error (_("Could not find \"%s\" in ABI list"), args);
347 /* A completion function for "set cp-abi". */
349 static VEC (char_ptr) *
350 cp_abi_completer (struct cmd_list_element *ignore,
351 const char *text, const char *word)
353 static const char **cp_abi_names;
355 if (cp_abi_names == NULL)
359 cp_abi_names = XNEWVEC (const char *, num_cp_abis + 1);
360 for (i = 0; i < num_cp_abis; ++i)
361 cp_abi_names[i] = cp_abis[i]->shortname;
362 cp_abi_names[i] = NULL;
365 return complete_on_enum (cp_abi_names, text, word);
368 /* Show the currently selected C++ ABI. */
371 show_cp_abi_cmd (char *args, int from_tty)
373 struct ui_out *uiout = current_uiout;
375 ui_out_text (uiout, "The currently selected C++ ABI is \"");
377 ui_out_field_string (uiout, "cp-abi", current_cp_abi.shortname);
378 ui_out_text (uiout, "\" (");
379 ui_out_field_string (uiout, "longname", current_cp_abi.longname);
380 ui_out_text (uiout, ").\n");
383 extern initialize_file_ftype _initialize_cp_abi; /* -Wmissing-prototypes */
386 _initialize_cp_abi (void)
388 struct cmd_list_element *c;
390 register_cp_abi (&auto_cp_abi);
391 switch_to_cp_abi ("auto");
393 c = add_cmd ("cp-abi", class_obscure, set_cp_abi_cmd, _("\
394 Set the ABI used for inspecting C++ objects.\n\
395 \"set cp-abi\" with no arguments will list the available ABIs."),
397 set_cmd_completer (c, cp_abi_completer);
399 add_cmd ("cp-abi", class_obscure, show_cp_abi_cmd,
400 _("Show the ABI used for inspecting C++ objects."),