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."),