1 /* Generic code for supporting multiple C++ ABI's
3 Copyright (C) 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "exceptions.h"
28 #include "gdb_assert.h"
29 #include "gdb_string.h"
31 static struct cp_abi_ops *find_cp_abi (const char *short_name);
33 static struct cp_abi_ops current_cp_abi = { "", NULL };
34 static struct cp_abi_ops auto_cp_abi = { "auto", NULL };
37 static struct cp_abi_ops *cp_abis[CP_ABI_MAX];
38 static int num_cp_abis = 0;
41 is_constructor_name (const char *name)
43 if ((current_cp_abi.is_constructor_name) == NULL)
44 error (_("ABI doesn't define required function is_constructor_name"));
45 return (*current_cp_abi.is_constructor_name) (name);
49 is_destructor_name (const char *name)
51 if ((current_cp_abi.is_destructor_name) == NULL)
52 error (_("ABI doesn't define required function is_destructor_name"));
53 return (*current_cp_abi.is_destructor_name) (name);
57 is_vtable_name (const char *name)
59 if ((current_cp_abi.is_vtable_name) == NULL)
60 error (_("ABI doesn't define required function is_vtable_name"));
61 return (*current_cp_abi.is_vtable_name) (name);
65 is_operator_name (const char *name)
67 if ((current_cp_abi.is_operator_name) == NULL)
68 error (_("ABI doesn't define required function is_operator_name"));
69 return (*current_cp_abi.is_operator_name) (name);
73 baseclass_offset (struct type *type, int index, const gdb_byte *valaddr,
74 int embedded_offset, CORE_ADDR address,
75 const struct value *val)
77 volatile struct gdb_exception ex;
80 gdb_assert (current_cp_abi.baseclass_offset != NULL);
82 TRY_CATCH (ex, RETURN_MASK_ERROR)
84 res = (*current_cp_abi.baseclass_offset) (type, index, valaddr,
89 if (ex.reason < 0 && ex.error == NOT_AVAILABLE_ERROR)
90 throw_error (NOT_AVAILABLE_ERROR,
91 _("Cannot determine virtual baseclass offset "
92 "of incomplete object"));
93 else if (ex.reason < 0)
100 value_virtual_fn_field (struct value **arg1p,
101 struct fn_field *f, int j,
102 struct type *type, int offset)
104 if ((current_cp_abi.virtual_fn_field) == NULL)
106 return (*current_cp_abi.virtual_fn_field) (arg1p, f, j,
111 value_rtti_type (struct value *v, int *full,
112 int *top, int *using_enc)
114 struct type *ret = NULL;
115 struct gdb_exception e;
117 if ((current_cp_abi.rtti_type) == NULL)
119 TRY_CATCH (e, RETURN_MASK_ERROR)
121 ret = (*current_cp_abi.rtti_type) (v, full, top, using_enc);
129 cplus_print_method_ptr (const gdb_byte *contents,
131 struct ui_file *stream)
133 if (current_cp_abi.print_method_ptr == NULL)
134 error (_("GDB does not support pointers to methods on this target"));
135 (*current_cp_abi.print_method_ptr) (contents, type, stream);
139 cplus_method_ptr_size (struct type *to_type)
141 if (current_cp_abi.method_ptr_size == NULL)
142 error (_("GDB does not support pointers to methods on this target"));
143 return (*current_cp_abi.method_ptr_size) (to_type);
147 cplus_make_method_ptr (struct type *type, gdb_byte *contents,
148 CORE_ADDR value, int is_virtual)
150 if (current_cp_abi.make_method_ptr == NULL)
151 error (_("GDB does not support pointers to methods on this target"));
152 (*current_cp_abi.make_method_ptr) (type, contents, value, is_virtual);
156 cplus_skip_trampoline (struct frame_info *frame,
159 if (current_cp_abi.skip_trampoline == NULL)
161 return (*current_cp_abi.skip_trampoline) (frame, stop_pc);
165 cplus_method_ptr_to_value (struct value **this_p,
166 struct value *method_ptr)
168 if (current_cp_abi.method_ptr_to_value == NULL)
169 error (_("GDB does not support pointers to methods on this target"));
170 return (*current_cp_abi.method_ptr_to_value) (this_p, method_ptr);
174 cp_pass_by_reference (struct type *type)
176 if ((current_cp_abi.pass_by_reference) == NULL)
178 return (*current_cp_abi.pass_by_reference) (type);
181 /* Set the current C++ ABI to SHORT_NAME. */
184 switch_to_cp_abi (const char *short_name)
186 struct cp_abi_ops *abi;
188 abi = find_cp_abi (short_name);
192 current_cp_abi = *abi;
196 /* Add ABI to the list of supported C++ ABI's. */
199 register_cp_abi (struct cp_abi_ops *abi)
201 if (num_cp_abis == CP_ABI_MAX)
202 internal_error (__FILE__, __LINE__,
203 _("Too many C++ ABIs, please increase "
204 "CP_ABI_MAX in cp-abi.c"));
206 cp_abis[num_cp_abis++] = abi;
211 /* Set the ABI to use in "auto" mode to SHORT_NAME. */
214 set_cp_abi_as_auto_default (const char *short_name)
216 char *new_longname, *new_doc;
217 struct cp_abi_ops *abi = find_cp_abi (short_name);
220 internal_error (__FILE__, __LINE__,
221 _("Cannot find C++ ABI \"%s\" to set it as auto default."),
224 if (auto_cp_abi.longname != NULL)
225 xfree ((char *) auto_cp_abi.longname);
226 if (auto_cp_abi.doc != NULL)
227 xfree ((char *) auto_cp_abi.doc);
231 auto_cp_abi.shortname = "auto";
232 new_longname = xstrprintf ("currently \"%s\"", abi->shortname);
233 auto_cp_abi.longname = new_longname;
235 new_doc = xstrprintf ("Automatically selected; currently \"%s\"",
237 auto_cp_abi.doc = new_doc;
239 /* Since we copy the current ABI into current_cp_abi instead of
240 using a pointer, if auto is currently the default, we need to
242 if (strcmp (current_cp_abi.shortname, "auto") == 0)
243 switch_to_cp_abi ("auto");
246 /* Return the ABI operations associated with SHORT_NAME. */
248 static struct cp_abi_ops *
249 find_cp_abi (const char *short_name)
253 for (i = 0; i < num_cp_abis; i++)
254 if (strcmp (cp_abis[i]->shortname, short_name) == 0)
260 /* Display the list of registered C++ ABIs. */
263 list_cp_abis (int from_tty)
265 struct cleanup *cleanup_chain;
268 ui_out_text (uiout, "The available C++ ABIs are:\n");
269 cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout,
271 for (i = 0; i < num_cp_abis; i++)
276 ui_out_text (uiout, " ");
277 ui_out_field_string (uiout, "cp-abi", cp_abis[i]->shortname);
279 padcount = 16 - 2 - strlen (cp_abis[i]->shortname);
282 pad[--padcount] = ' ';
283 ui_out_text (uiout, pad);
285 ui_out_field_string (uiout, "doc", cp_abis[i]->doc);
286 ui_out_text (uiout, "\n");
288 do_cleanups (cleanup_chain);
291 /* Set the current C++ ABI, or display the list of options if no
292 argument is given. */
295 set_cp_abi_cmd (char *args, int from_tty)
299 list_cp_abis (from_tty);
303 if (!switch_to_cp_abi (args))
304 error (_("Could not find \"%s\" in ABI list"), args);
307 /* Show the currently selected C++ ABI. */
310 show_cp_abi_cmd (char *args, int from_tty)
312 ui_out_text (uiout, "The currently selected C++ ABI is \"");
314 ui_out_field_string (uiout, "cp-abi", current_cp_abi.shortname);
315 ui_out_text (uiout, "\" (");
316 ui_out_field_string (uiout, "longname", current_cp_abi.longname);
317 ui_out_text (uiout, ").\n");
320 extern initialize_file_ftype _initialize_cp_abi; /* -Wmissing-prototypes */
323 _initialize_cp_abi (void)
325 register_cp_abi (&auto_cp_abi);
326 switch_to_cp_abi ("auto");
328 add_cmd ("cp-abi", class_obscure, set_cp_abi_cmd, _("\
329 Set the ABI used for inspecting C++ objects.\n\
330 \"set cp-abi\" with no arguments will list the available ABIs."),
333 add_cmd ("cp-abi", class_obscure, show_cp_abi_cmd,
334 _("Show the ABI used for inspecting C++ objects."),