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."),