Upgrade GDB from 7.4.1 to 7.6.1 on the vendor branch
[dragonfly.git] / contrib / gdb-7 / gdb / cp-abi.c
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1/* Generic code for supporting multiple C++ ABI's
2
ef5ccd6c 3 Copyright (C) 2001-2013 Free Software Foundation, Inc.
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4
5 This file is part of GDB.
6
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.
11
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.
16
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/>. */
19
20#include "defs.h"
21#include "value.h"
22#include "cp-abi.h"
23#include "command.h"
24#include "exceptions.h"
25#include "gdbcmd.h"
26#include "ui-out.h"
c50c785c 27#include "gdb_assert.h"
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28#include "gdb_string.h"
29
30static struct cp_abi_ops *find_cp_abi (const char *short_name);
31
32static struct cp_abi_ops current_cp_abi = { "", NULL };
33static struct cp_abi_ops auto_cp_abi = { "auto", NULL };
34
35#define CP_ABI_MAX 8
36static struct cp_abi_ops *cp_abis[CP_ABI_MAX];
37static int num_cp_abis = 0;
38
39enum ctor_kinds
40is_constructor_name (const char *name)
41{
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);
45}
46
47enum dtor_kinds
48is_destructor_name (const char *name)
49{
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);
53}
54
55int
56is_vtable_name (const char *name)
57{
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);
61}
62
63int
64is_operator_name (const char *name)
65{
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);
69}
70
71int
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72baseclass_offset (struct type *type, int index, const gdb_byte *valaddr,
73 int embedded_offset, CORE_ADDR address,
74 const struct value *val)
5796c8dc 75{
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76 volatile struct gdb_exception ex;
77 int res = 0;
78
79 gdb_assert (current_cp_abi.baseclass_offset != NULL);
80
81 TRY_CATCH (ex, RETURN_MASK_ERROR)
82 {
83 res = (*current_cp_abi.baseclass_offset) (type, index, valaddr,
84 embedded_offset,
85 address, val);
86 }
87
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)
93 throw_exception (ex);
94 else
95 return res;
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96}
97
98struct value *
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99value_virtual_fn_field (struct value **arg1p,
100 struct fn_field *f, int j,
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101 struct type *type, int offset)
102{
103 if ((current_cp_abi.virtual_fn_field) == NULL)
104 return NULL;
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105 return (*current_cp_abi.virtual_fn_field) (arg1p, f, j,
106 type, offset);
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107}
108
109struct type *
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110value_rtti_type (struct value *v, int *full,
111 int *top, int *using_enc)
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112{
113 struct type *ret = NULL;
ef5ccd6c 114 volatile struct gdb_exception e;
cf7f2e2d 115
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116 if ((current_cp_abi.rtti_type) == NULL)
117 return NULL;
118 TRY_CATCH (e, RETURN_MASK_ERROR)
119 {
120 ret = (*current_cp_abi.rtti_type) (v, full, top, using_enc);
121 }
122 if (e.reason < 0)
123 return NULL;
124 return ret;
125}
126
127void
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128cplus_print_method_ptr (const gdb_byte *contents,
129 struct type *type,
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130 struct ui_file *stream)
131{
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);
135}
136
137int
138cplus_method_ptr_size (struct type *to_type)
139{
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);
143}
144
145void
146cplus_make_method_ptr (struct type *type, gdb_byte *contents,
147 CORE_ADDR value, int is_virtual)
148{
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);
152}
153
154CORE_ADDR
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155cplus_skip_trampoline (struct frame_info *frame,
156 CORE_ADDR stop_pc)
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157{
158 if (current_cp_abi.skip_trampoline == NULL)
159 return 0;
160 return (*current_cp_abi.skip_trampoline) (frame, stop_pc);
161}
162
163struct value *
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164cplus_method_ptr_to_value (struct value **this_p,
165 struct value *method_ptr)
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166{
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);
170}
171
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172/* See cp-abi.h. */
173
174void
175cplus_print_vtable (struct value *value)
176{
177 if (current_cp_abi.print_vtable == NULL)
178 error (_("GDB cannot print the vtable on this target"));
179 (*current_cp_abi.print_vtable) (value);
180}
181
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182int
183cp_pass_by_reference (struct type *type)
184{
185 if ((current_cp_abi.pass_by_reference) == NULL)
186 return 0;
187 return (*current_cp_abi.pass_by_reference) (type);
188}
189
190/* Set the current C++ ABI to SHORT_NAME. */
191
192static int
193switch_to_cp_abi (const char *short_name)
194{
195 struct cp_abi_ops *abi;
196
197 abi = find_cp_abi (short_name);
198 if (abi == NULL)
199 return 0;
200
201 current_cp_abi = *abi;
202 return 1;
203}
204
205/* Add ABI to the list of supported C++ ABI's. */
206
207int
208register_cp_abi (struct cp_abi_ops *abi)
209{
210 if (num_cp_abis == CP_ABI_MAX)
211 internal_error (__FILE__, __LINE__,
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212 _("Too many C++ ABIs, please increase "
213 "CP_ABI_MAX in cp-abi.c"));
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214
215 cp_abis[num_cp_abis++] = abi;
216
217 return 1;
218}
219
220/* Set the ABI to use in "auto" mode to SHORT_NAME. */
221
222void
223set_cp_abi_as_auto_default (const char *short_name)
224{
225 char *new_longname, *new_doc;
226 struct cp_abi_ops *abi = find_cp_abi (short_name);
227
228 if (abi == NULL)
229 internal_error (__FILE__, __LINE__,
230 _("Cannot find C++ ABI \"%s\" to set it as auto default."),
231 short_name);
232
233 if (auto_cp_abi.longname != NULL)
234 xfree ((char *) auto_cp_abi.longname);
235 if (auto_cp_abi.doc != NULL)
236 xfree ((char *) auto_cp_abi.doc);
237
238 auto_cp_abi = *abi;
239
240 auto_cp_abi.shortname = "auto";
241 new_longname = xstrprintf ("currently \"%s\"", abi->shortname);
242 auto_cp_abi.longname = new_longname;
243
244 new_doc = xstrprintf ("Automatically selected; currently \"%s\"",
245 abi->shortname);
246 auto_cp_abi.doc = new_doc;
247
248 /* Since we copy the current ABI into current_cp_abi instead of
249 using a pointer, if auto is currently the default, we need to
250 reset it. */
251 if (strcmp (current_cp_abi.shortname, "auto") == 0)
252 switch_to_cp_abi ("auto");
253}
254
255/* Return the ABI operations associated with SHORT_NAME. */
256
257static struct cp_abi_ops *
258find_cp_abi (const char *short_name)
259{
260 int i;
261
262 for (i = 0; i < num_cp_abis; i++)
263 if (strcmp (cp_abis[i]->shortname, short_name) == 0)
264 return cp_abis[i];
265
266 return NULL;
267}
268
269/* Display the list of registered C++ ABIs. */
270
271static void
272list_cp_abis (int from_tty)
273{
a45ae5f8 274 struct ui_out *uiout = current_uiout;
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275 struct cleanup *cleanup_chain;
276 int i;
5796c8dc 277
cf7f2e2d 278 ui_out_text (uiout, "The available C++ ABIs are:\n");
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279 cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout,
280 "cp-abi-list");
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281 for (i = 0; i < num_cp_abis; i++)
282 {
283 char pad[14];
284 int padcount;
285
286 ui_out_text (uiout, " ");
287 ui_out_field_string (uiout, "cp-abi", cp_abis[i]->shortname);
288
289 padcount = 16 - 2 - strlen (cp_abis[i]->shortname);
290 pad[padcount] = 0;
291 while (padcount > 0)
292 pad[--padcount] = ' ';
293 ui_out_text (uiout, pad);
294
295 ui_out_field_string (uiout, "doc", cp_abis[i]->doc);
296 ui_out_text (uiout, "\n");
297 }
298 do_cleanups (cleanup_chain);
299}
300
301/* Set the current C++ ABI, or display the list of options if no
302 argument is given. */
303
304static void
305set_cp_abi_cmd (char *args, int from_tty)
306{
307 if (args == NULL)
308 {
309 list_cp_abis (from_tty);
310 return;
311 }
312
313 if (!switch_to_cp_abi (args))
314 error (_("Could not find \"%s\" in ABI list"), args);
315}
316
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317/* A completion function for "set cp-abi". */
318
319static VEC (char_ptr) *
320cp_abi_completer (struct cmd_list_element *ignore,
321 char *text, char *word)
322{
323 static const char **cp_abi_names;
324
325 if (cp_abi_names == NULL)
326 {
327 int i;
328
329 cp_abi_names = XNEWVEC (const char *, num_cp_abis + 1);
330 for (i = 0; i < num_cp_abis; ++i)
331 cp_abi_names[i] = cp_abis[i]->shortname;
332 cp_abi_names[i] = NULL;
333 }
334
335 return complete_on_enum (cp_abi_names, text, word);
336}
337
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338/* Show the currently selected C++ ABI. */
339
340static void
341show_cp_abi_cmd (char *args, int from_tty)
342{
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343 struct ui_out *uiout = current_uiout;
344
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345 ui_out_text (uiout, "The currently selected C++ ABI is \"");
346
347 ui_out_field_string (uiout, "cp-abi", current_cp_abi.shortname);
348 ui_out_text (uiout, "\" (");
349 ui_out_field_string (uiout, "longname", current_cp_abi.longname);
350 ui_out_text (uiout, ").\n");
351}
352
353extern initialize_file_ftype _initialize_cp_abi; /* -Wmissing-prototypes */
354
355void
356_initialize_cp_abi (void)
357{
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358 struct cmd_list_element *c;
359
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360 register_cp_abi (&auto_cp_abi);
361 switch_to_cp_abi ("auto");
362
ef5ccd6c 363 c = add_cmd ("cp-abi", class_obscure, set_cp_abi_cmd, _("\
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364Set the ABI used for inspecting C++ objects.\n\
365\"set cp-abi\" with no arguments will list the available ABIs."),
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366 &setlist);
367 set_cmd_completer (c, cp_abi_completer);
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368
369 add_cmd ("cp-abi", class_obscure, show_cp_abi_cmd,
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370 _("Show the ABI used for inspecting C++ objects."),
371 &showlist);
5796c8dc 372}