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"
29 static struct cp_abi_ops
*find_cp_abi (const char *short_name
);
31 static struct cp_abi_ops current_cp_abi
= { "", NULL
};
32 static struct cp_abi_ops auto_cp_abi
= { "auto", NULL
};
35 static struct cp_abi_ops
*cp_abis
[CP_ABI_MAX
];
36 static int num_cp_abis
= 0;
39 is_constructor_name (const char *name
)
41 if ((current_cp_abi
.is_constructor_name
) == NULL
)
42 error (_("ABI doesn't define required function is_constructor_name"));
43 return (*current_cp_abi
.is_constructor_name
) (name
);
47 is_destructor_name (const char *name
)
49 if ((current_cp_abi
.is_destructor_name
) == NULL
)
50 error (_("ABI doesn't define required function is_destructor_name"));
51 return (*current_cp_abi
.is_destructor_name
) (name
);
55 is_vtable_name (const char *name
)
57 if ((current_cp_abi
.is_vtable_name
) == NULL
)
58 error (_("ABI doesn't define required function is_vtable_name"));
59 return (*current_cp_abi
.is_vtable_name
) (name
);
63 is_operator_name (const char *name
)
65 if ((current_cp_abi
.is_operator_name
) == NULL
)
66 error (_("ABI doesn't define required function is_operator_name"));
67 return (*current_cp_abi
.is_operator_name
) (name
);
71 baseclass_offset (struct type
*type
, int index
, const gdb_byte
*valaddr
,
72 int embedded_offset
, CORE_ADDR address
,
73 const struct value
*val
)
75 volatile struct gdb_exception ex
;
78 gdb_assert (current_cp_abi
.baseclass_offset
!= NULL
);
80 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
82 res
= (*current_cp_abi
.baseclass_offset
) (type
, index
, valaddr
,
87 if (ex
.reason
< 0 && ex
.error
== NOT_AVAILABLE_ERROR
)
88 throw_error (NOT_AVAILABLE_ERROR
,
89 _("Cannot determine virtual baseclass offset "
90 "of incomplete object"));
91 else if (ex
.reason
< 0)
98 value_virtual_fn_field (struct value
**arg1p
,
99 struct fn_field
*f
, int j
,
100 struct type
*type
, int offset
)
102 if ((current_cp_abi
.virtual_fn_field
) == NULL
)
104 return (*current_cp_abi
.virtual_fn_field
) (arg1p
, f
, j
,
109 value_rtti_type (struct value
*v
, int *full
,
110 int *top
, int *using_enc
)
112 struct type
*ret
= NULL
;
113 volatile struct gdb_exception e
;
115 if ((current_cp_abi
.rtti_type
) == NULL
)
117 TRY_CATCH (e
, RETURN_MASK_ERROR
)
119 ret
= (*current_cp_abi
.rtti_type
) (v
, full
, top
, using_enc
);
127 cplus_print_method_ptr (const gdb_byte
*contents
,
129 struct ui_file
*stream
)
131 if (current_cp_abi
.print_method_ptr
== NULL
)
132 error (_("GDB does not support pointers to methods on this target"));
133 (*current_cp_abi
.print_method_ptr
) (contents
, type
, stream
);
137 cplus_method_ptr_size (struct type
*to_type
)
139 if (current_cp_abi
.method_ptr_size
== NULL
)
140 error (_("GDB does not support pointers to methods on this target"));
141 return (*current_cp_abi
.method_ptr_size
) (to_type
);
145 cplus_make_method_ptr (struct type
*type
, gdb_byte
*contents
,
146 CORE_ADDR value
, int is_virtual
)
148 if (current_cp_abi
.make_method_ptr
== NULL
)
149 error (_("GDB does not support pointers to methods on this target"));
150 (*current_cp_abi
.make_method_ptr
) (type
, contents
, value
, is_virtual
);
154 cplus_skip_trampoline (struct frame_info
*frame
,
157 if (current_cp_abi
.skip_trampoline
== NULL
)
159 return (*current_cp_abi
.skip_trampoline
) (frame
, stop_pc
);
163 cplus_method_ptr_to_value (struct value
**this_p
,
164 struct value
*method_ptr
)
166 if (current_cp_abi
.method_ptr_to_value
== NULL
)
167 error (_("GDB does not support pointers to methods on this target"));
168 return (*current_cp_abi
.method_ptr_to_value
) (this_p
, method_ptr
);
174 cplus_print_vtable (struct value
*value
)
176 if (current_cp_abi
.print_vtable
== NULL
)
177 error (_("GDB cannot print the vtable on this target"));
178 (*current_cp_abi
.print_vtable
) (value
);
184 cplus_typeid (struct value
*value
)
186 if (current_cp_abi
.get_typeid
== NULL
)
187 error (_("GDB cannot find the typeid on this target"));
188 return (*current_cp_abi
.get_typeid
) (value
);
194 cplus_typeid_type (struct gdbarch
*gdbarch
)
196 if (current_cp_abi
.get_typeid_type
== NULL
)
197 error (_("GDB cannot find the type for 'typeid' on this target"));
198 return (*current_cp_abi
.get_typeid_type
) (gdbarch
);
204 cplus_type_from_type_info (struct value
*value
)
206 if (current_cp_abi
.get_type_from_type_info
== NULL
)
207 error (_("GDB cannot find the type from a std::type_info on this target"));
208 return (*current_cp_abi
.get_type_from_type_info
) (value
);
214 cplus_typename_from_type_info (struct value
*value
)
216 if (current_cp_abi
.get_typename_from_type_info
== NULL
)
217 error (_("GDB cannot find the type name "
218 "from a std::type_info on this target"));
219 return (*current_cp_abi
.get_typename_from_type_info
) (value
);
223 cp_pass_by_reference (struct type
*type
)
225 if ((current_cp_abi
.pass_by_reference
) == NULL
)
227 return (*current_cp_abi
.pass_by_reference
) (type
);
230 /* Set the current C++ ABI to SHORT_NAME. */
233 switch_to_cp_abi (const char *short_name
)
235 struct cp_abi_ops
*abi
;
237 abi
= find_cp_abi (short_name
);
241 current_cp_abi
= *abi
;
245 /* Add ABI to the list of supported C++ ABI's. */
248 register_cp_abi (struct cp_abi_ops
*abi
)
250 if (num_cp_abis
== CP_ABI_MAX
)
251 internal_error (__FILE__
, __LINE__
,
252 _("Too many C++ ABIs, please increase "
253 "CP_ABI_MAX in cp-abi.c"));
255 cp_abis
[num_cp_abis
++] = abi
;
260 /* Set the ABI to use in "auto" mode to SHORT_NAME. */
263 set_cp_abi_as_auto_default (const char *short_name
)
265 char *new_longname
, *new_doc
;
266 struct cp_abi_ops
*abi
= find_cp_abi (short_name
);
269 internal_error (__FILE__
, __LINE__
,
270 _("Cannot find C++ ABI \"%s\" to set it as auto default."),
273 if (auto_cp_abi
.longname
!= NULL
)
274 xfree ((char *) auto_cp_abi
.longname
);
275 if (auto_cp_abi
.doc
!= NULL
)
276 xfree ((char *) auto_cp_abi
.doc
);
280 auto_cp_abi
.shortname
= "auto";
281 new_longname
= xstrprintf ("currently \"%s\"", abi
->shortname
);
282 auto_cp_abi
.longname
= new_longname
;
284 new_doc
= xstrprintf ("Automatically selected; currently \"%s\"",
286 auto_cp_abi
.doc
= new_doc
;
288 /* Since we copy the current ABI into current_cp_abi instead of
289 using a pointer, if auto is currently the default, we need to
291 if (strcmp (current_cp_abi
.shortname
, "auto") == 0)
292 switch_to_cp_abi ("auto");
295 /* Return the ABI operations associated with SHORT_NAME. */
297 static struct cp_abi_ops
*
298 find_cp_abi (const char *short_name
)
302 for (i
= 0; i
< num_cp_abis
; i
++)
303 if (strcmp (cp_abis
[i
]->shortname
, short_name
) == 0)
309 /* Display the list of registered C++ ABIs. */
312 list_cp_abis (int from_tty
)
314 struct ui_out
*uiout
= current_uiout
;
315 struct cleanup
*cleanup_chain
;
318 ui_out_text (uiout
, "The available C++ ABIs are:\n");
319 cleanup_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
,
321 for (i
= 0; i
< num_cp_abis
; i
++)
326 ui_out_text (uiout
, " ");
327 ui_out_field_string (uiout
, "cp-abi", cp_abis
[i
]->shortname
);
329 padcount
= 16 - 2 - strlen (cp_abis
[i
]->shortname
);
332 pad
[--padcount
] = ' ';
333 ui_out_text (uiout
, pad
);
335 ui_out_field_string (uiout
, "doc", cp_abis
[i
]->doc
);
336 ui_out_text (uiout
, "\n");
338 do_cleanups (cleanup_chain
);
341 /* Set the current C++ ABI, or display the list of options if no
342 argument is given. */
345 set_cp_abi_cmd (char *args
, int from_tty
)
349 list_cp_abis (from_tty
);
353 if (!switch_to_cp_abi (args
))
354 error (_("Could not find \"%s\" in ABI list"), args
);
357 /* A completion function for "set cp-abi". */
359 static VEC (char_ptr
) *
360 cp_abi_completer (struct cmd_list_element
*ignore
,
361 const char *text
, const char *word
)
363 static const char **cp_abi_names
;
365 if (cp_abi_names
== NULL
)
369 cp_abi_names
= XNEWVEC (const char *, num_cp_abis
+ 1);
370 for (i
= 0; i
< num_cp_abis
; ++i
)
371 cp_abi_names
[i
] = cp_abis
[i
]->shortname
;
372 cp_abi_names
[i
] = NULL
;
375 return complete_on_enum (cp_abi_names
, text
, word
);
378 /* Show the currently selected C++ ABI. */
381 show_cp_abi_cmd (char *args
, int from_tty
)
383 struct ui_out
*uiout
= current_uiout
;
385 ui_out_text (uiout
, "The currently selected C++ ABI is \"");
387 ui_out_field_string (uiout
, "cp-abi", current_cp_abi
.shortname
);
388 ui_out_text (uiout
, "\" (");
389 ui_out_field_string (uiout
, "longname", current_cp_abi
.longname
);
390 ui_out_text (uiout
, ").\n");
393 extern initialize_file_ftype _initialize_cp_abi
; /* -Wmissing-prototypes */
396 _initialize_cp_abi (void)
398 struct cmd_list_element
*c
;
400 register_cp_abi (&auto_cp_abi
);
401 switch_to_cp_abi ("auto");
403 c
= add_cmd ("cp-abi", class_obscure
, set_cp_abi_cmd
, _("\
404 Set the ABI used for inspecting C++ objects.\n\
405 \"set cp-abi\" with no arguments will list the available ABIs."),
407 set_cmd_completer (c
, cp_abi_completer
);
409 add_cmd ("cp-abi", class_obscure
, show_cp_abi_cmd
,
410 _("Show the ABI used for inspecting C++ objects."),