1 /* Generic code for supporting multiple C++ ABI's
3 Copyright (C) 2001-2003, 2005-2012 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
);
173 cp_pass_by_reference (struct type
*type
)
175 if ((current_cp_abi
.pass_by_reference
) == NULL
)
177 return (*current_cp_abi
.pass_by_reference
) (type
);
180 /* Set the current C++ ABI to SHORT_NAME. */
183 switch_to_cp_abi (const char *short_name
)
185 struct cp_abi_ops
*abi
;
187 abi
= find_cp_abi (short_name
);
191 current_cp_abi
= *abi
;
195 /* Add ABI to the list of supported C++ ABI's. */
198 register_cp_abi (struct cp_abi_ops
*abi
)
200 if (num_cp_abis
== CP_ABI_MAX
)
201 internal_error (__FILE__
, __LINE__
,
202 _("Too many C++ ABIs, please increase "
203 "CP_ABI_MAX in cp-abi.c"));
205 cp_abis
[num_cp_abis
++] = abi
;
210 /* Set the ABI to use in "auto" mode to SHORT_NAME. */
213 set_cp_abi_as_auto_default (const char *short_name
)
215 char *new_longname
, *new_doc
;
216 struct cp_abi_ops
*abi
= find_cp_abi (short_name
);
219 internal_error (__FILE__
, __LINE__
,
220 _("Cannot find C++ ABI \"%s\" to set it as auto default."),
223 if (auto_cp_abi
.longname
!= NULL
)
224 xfree ((char *) auto_cp_abi
.longname
);
225 if (auto_cp_abi
.doc
!= NULL
)
226 xfree ((char *) auto_cp_abi
.doc
);
230 auto_cp_abi
.shortname
= "auto";
231 new_longname
= xstrprintf ("currently \"%s\"", abi
->shortname
);
232 auto_cp_abi
.longname
= new_longname
;
234 new_doc
= xstrprintf ("Automatically selected; currently \"%s\"",
236 auto_cp_abi
.doc
= new_doc
;
238 /* Since we copy the current ABI into current_cp_abi instead of
239 using a pointer, if auto is currently the default, we need to
241 if (strcmp (current_cp_abi
.shortname
, "auto") == 0)
242 switch_to_cp_abi ("auto");
245 /* Return the ABI operations associated with SHORT_NAME. */
247 static struct cp_abi_ops
*
248 find_cp_abi (const char *short_name
)
252 for (i
= 0; i
< num_cp_abis
; i
++)
253 if (strcmp (cp_abis
[i
]->shortname
, short_name
) == 0)
259 /* Display the list of registered C++ ABIs. */
262 list_cp_abis (int from_tty
)
264 struct ui_out
*uiout
= current_uiout
;
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 struct ui_out
*uiout
= current_uiout
;
314 ui_out_text (uiout
, "The currently selected C++ ABI is \"");
316 ui_out_field_string (uiout
, "cp-abi", current_cp_abi
.shortname
);
317 ui_out_text (uiout
, "\" (");
318 ui_out_field_string (uiout
, "longname", current_cp_abi
.longname
);
319 ui_out_text (uiout
, ").\n");
322 extern initialize_file_ftype _initialize_cp_abi
; /* -Wmissing-prototypes */
325 _initialize_cp_abi (void)
327 register_cp_abi (&auto_cp_abi
);
328 switch_to_cp_abi ("auto");
330 add_cmd ("cp-abi", class_obscure
, set_cp_abi_cmd
, _("\
331 Set the ABI used for inspecting C++ objects.\n\
332 \"set cp-abi\" with no arguments will list the available ABIs."),
335 add_cmd ("cp-abi", class_obscure
, show_cp_abi_cmd
,
336 _("Show the ABI used for inspecting C++ objects."),