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1 /* Language independent support for printing types for GDB, the GNU debugger.
2
3 Copyright (C) 1986-2019 Free Software Foundation, Inc.
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 "gdb_obstack.h"
22 #include "bfd.h" /* Binary File Description */
23 #include "symtab.h"
24 #include "gdbtypes.h"
25 #include "expression.h"
26 #include "value.h"
27 #include "gdbcore.h"
28 #include "command.h"
29 #include "gdbcmd.h"
30 #include "target.h"
31 #include "language.h"
32 #include "cp-abi.h"
33 #include "typeprint.h"
34 #include "valprint.h"
35 #include <ctype.h>
36 #include "cli/cli-utils.h"
37 #include "extension.h"
38 #include "completer.h"
39
40 const struct type_print_options type_print_raw_options =
41 {
42 1, /* raw */
43 1, /* print_methods */
44 1, /* print_typedefs */
45 0, /* print_offsets */
46 0, /* print_nested_type_limit */
47 NULL, /* local_typedefs */
48 NULL, /* global_table */
49 NULL /* global_printers */
50 };
51
52 /* The default flags for 'ptype' and 'whatis'. */
53
54 static struct type_print_options default_ptype_flags =
55 {
56 0, /* raw */
57 1, /* print_methods */
58 1, /* print_typedefs */
59 0, /* print_offsets */
60 0, /* print_nested_type_limit */
61 NULL, /* local_typedefs */
62 NULL, /* global_table */
63 NULL /* global_printers */
64 };
65
66 \f
67
68 /* See typeprint.h. */
69
70 const int print_offset_data::indentation = 23;
71
72
73 /* See typeprint.h. */
74
75 void
76 print_offset_data::maybe_print_hole (struct ui_file *stream,
77 unsigned int bitpos,
78 const char *for_what)
79 {
80 /* We check for END_BITPOS > 0 because there is a specific
81 scenario when END_BITPOS can be zero and BITPOS can be >
82 0: when we are dealing with a struct/class with a virtual method.
83 Because of the vtable, the first field of the struct/class will
84 have an offset of sizeof (void *) (the size of the vtable). If
85 we do not check for END_BITPOS > 0 here, GDB will report
86 a hole before the first field, which is not accurate. */
87 if (end_bitpos > 0 && end_bitpos < bitpos)
88 {
89 /* If END_BITPOS is smaller than the current type's
90 bitpos, it means there's a hole in the struct, so we report
91 it here. */
92 unsigned int hole = bitpos - end_bitpos;
93 unsigned int hole_byte = hole / TARGET_CHAR_BIT;
94 unsigned int hole_bit = hole % TARGET_CHAR_BIT;
95
96 if (hole_bit > 0)
97 fprintf_filtered (stream, "/* XXX %2u-bit %s */\n", hole_bit,
98 for_what);
99
100 if (hole_byte > 0)
101 fprintf_filtered (stream, "/* XXX %2u-byte %s */\n", hole_byte,
102 for_what);
103 }
104 }
105
106 /* See typeprint.h. */
107
108 void
109 print_offset_data::update (struct type *type, unsigned int field_idx,
110 struct ui_file *stream)
111 {
112 if (field_is_static (&TYPE_FIELD (type, field_idx)))
113 {
114 print_spaces_filtered (indentation, stream);
115 return;
116 }
117
118 struct type *ftype = check_typedef (TYPE_FIELD_TYPE (type, field_idx));
119 if (TYPE_CODE (type) == TYPE_CODE_UNION)
120 {
121 /* Since union fields don't have the concept of offsets, we just
122 print their sizes. */
123 fprintf_filtered (stream, "/* %4s */",
124 pulongest (TYPE_LENGTH (ftype)));
125 return;
126 }
127
128 unsigned int bitpos = TYPE_FIELD_BITPOS (type, field_idx);
129 unsigned int fieldsize_byte = TYPE_LENGTH (ftype);
130 unsigned int fieldsize_bit = fieldsize_byte * TARGET_CHAR_BIT;
131
132 maybe_print_hole (stream, bitpos, "hole");
133
134 if (TYPE_FIELD_PACKED (type, field_idx)
135 || offset_bitpos % TARGET_CHAR_BIT != 0)
136 {
137 /* We're dealing with a bitfield. Print the bit offset. */
138 fieldsize_bit = TYPE_FIELD_BITSIZE (type, field_idx);
139
140 unsigned real_bitpos = bitpos + offset_bitpos;
141
142 fprintf_filtered (stream, "/* %4u:%2u", real_bitpos / TARGET_CHAR_BIT,
143 real_bitpos % TARGET_CHAR_BIT);
144 }
145 else
146 {
147 /* The position of the field, relative to the beginning of the
148 struct. */
149 fprintf_filtered (stream, "/* %4u",
150 (bitpos + offset_bitpos) / TARGET_CHAR_BIT);
151
152 fprintf_filtered (stream, " ");
153 }
154
155 fprintf_filtered (stream, " | %4u */", fieldsize_byte);
156
157 end_bitpos = bitpos + fieldsize_bit;
158 }
159
160 /* See typeprint.h. */
161
162 void
163 print_offset_data::finish (struct type *type, int level,
164 struct ui_file *stream)
165 {
166 unsigned int bitpos = TYPE_LENGTH (type) * TARGET_CHAR_BIT;
167 maybe_print_hole (stream, bitpos, "padding");
168
169 fputs_filtered ("\n", stream);
170 print_spaces_filtered (level + 4 + print_offset_data::indentation, stream);
171 fprintf_filtered (stream, "/* total size (bytes): %4s */\n",
172 pulongest (TYPE_LENGTH (type)));
173 }
174
175 \f
176
177 /* A hash function for a typedef_field. */
178
179 static hashval_t
180 hash_typedef_field (const void *p)
181 {
182 const struct decl_field *tf = (const struct decl_field *) p;
183 struct type *t = check_typedef (tf->type);
184
185 return htab_hash_string (TYPE_SAFE_NAME (t));
186 }
187
188 /* An equality function for a typedef field. */
189
190 static int
191 eq_typedef_field (const void *a, const void *b)
192 {
193 const struct decl_field *tfa = (const struct decl_field *) a;
194 const struct decl_field *tfb = (const struct decl_field *) b;
195
196 return types_equal (tfa->type, tfb->type);
197 }
198
199 /* See typeprint.h. */
200
201 void
202 typedef_hash_table::recursively_update (struct type *t)
203 {
204 int i;
205
206 for (i = 0; i < TYPE_TYPEDEF_FIELD_COUNT (t); ++i)
207 {
208 struct decl_field *tdef = &TYPE_TYPEDEF_FIELD (t, i);
209 void **slot;
210
211 slot = htab_find_slot (m_table, tdef, INSERT);
212 /* Only add a given typedef name once. Really this shouldn't
213 happen; but it is safe enough to do the updates breadth-first
214 and thus use the most specific typedef. */
215 if (*slot == NULL)
216 *slot = tdef;
217 }
218
219 /* Recurse into superclasses. */
220 for (i = 0; i < TYPE_N_BASECLASSES (t); ++i)
221 recursively_update (TYPE_BASECLASS (t, i));
222 }
223
224 /* See typeprint.h. */
225
226 void
227 typedef_hash_table::add_template_parameters (struct type *t)
228 {
229 int i;
230
231 for (i = 0; i < TYPE_N_TEMPLATE_ARGUMENTS (t); ++i)
232 {
233 struct decl_field *tf;
234 void **slot;
235
236 /* We only want type-valued template parameters in the hash. */
237 if (SYMBOL_CLASS (TYPE_TEMPLATE_ARGUMENT (t, i)) != LOC_TYPEDEF)
238 continue;
239
240 tf = XOBNEW (&m_storage, struct decl_field);
241 tf->name = SYMBOL_LINKAGE_NAME (TYPE_TEMPLATE_ARGUMENT (t, i));
242 tf->type = SYMBOL_TYPE (TYPE_TEMPLATE_ARGUMENT (t, i));
243
244 slot = htab_find_slot (m_table, tf, INSERT);
245 if (*slot == NULL)
246 *slot = tf;
247 }
248 }
249
250 /* See typeprint.h. */
251
252 typedef_hash_table::typedef_hash_table ()
253 {
254 m_table = htab_create_alloc (10, hash_typedef_field, eq_typedef_field,
255 NULL, xcalloc, xfree);
256 }
257
258 /* Free a typedef field table. */
259
260 typedef_hash_table::~typedef_hash_table ()
261 {
262 htab_delete (m_table);
263 }
264
265 /* Helper function for typedef_hash_table::copy. */
266
267 static int
268 copy_typedef_hash_element (void **slot, void *nt)
269 {
270 htab_t new_table = (htab_t) nt;
271 void **new_slot;
272
273 new_slot = htab_find_slot (new_table, *slot, INSERT);
274 if (*new_slot == NULL)
275 *new_slot = *slot;
276
277 return 1;
278 }
279
280 /* See typeprint.h. */
281
282 typedef_hash_table::typedef_hash_table (const typedef_hash_table &table)
283 {
284 m_table = htab_create_alloc (10, hash_typedef_field, eq_typedef_field,
285 NULL, xcalloc, xfree);
286 htab_traverse_noresize (table.m_table, copy_typedef_hash_element,
287 m_table);
288 }
289
290 /* Look up the type T in the global typedef hash. If it is found,
291 return the typedef name. If it is not found, apply the
292 type-printers, if any, given by start_script_type_printers and return the
293 result. A NULL return means that the name was not found. */
294
295 const char *
296 typedef_hash_table::find_global_typedef (const struct type_print_options *flags,
297 struct type *t)
298 {
299 char *applied;
300 void **slot;
301 struct decl_field tf, *new_tf;
302
303 if (flags->global_typedefs == NULL)
304 return NULL;
305
306 tf.name = NULL;
307 tf.type = t;
308
309 slot = htab_find_slot (flags->global_typedefs->m_table, &tf, INSERT);
310 if (*slot != NULL)
311 {
312 new_tf = (struct decl_field *) *slot;
313 return new_tf->name;
314 }
315
316 /* Put an entry into the hash table now, in case
317 apply_ext_lang_type_printers recurses. */
318 new_tf = XOBNEW (&flags->global_typedefs->m_storage, struct decl_field);
319 new_tf->name = NULL;
320 new_tf->type = t;
321
322 *slot = new_tf;
323
324 applied = apply_ext_lang_type_printers (flags->global_printers, t);
325
326 if (applied != NULL)
327 {
328 new_tf->name
329 = (const char *) obstack_copy0 (&flags->global_typedefs->m_storage,
330 applied, strlen (applied));
331 xfree (applied);
332 }
333
334 return new_tf->name;
335 }
336
337 /* See typeprint.h. */
338
339 const char *
340 typedef_hash_table::find_typedef (const struct type_print_options *flags,
341 struct type *t)
342 {
343 if (flags->local_typedefs != NULL)
344 {
345 struct decl_field tf, *found;
346
347 tf.name = NULL;
348 tf.type = t;
349 found = (struct decl_field *) htab_find (flags->local_typedefs->m_table,
350 &tf);
351
352 if (found != NULL)
353 return found->name;
354 }
355
356 return find_global_typedef (flags, t);
357 }
358
359 \f
360
361 /* Print a description of a type in the format of a
362 typedef for the current language.
363 NEW is the new name for a type TYPE. */
364
365 void
366 typedef_print (struct type *type, struct symbol *newobj, struct ui_file *stream)
367 {
368 LA_PRINT_TYPEDEF (type, newobj, stream);
369 }
370
371 /* The default way to print a typedef. */
372
373 void
374 default_print_typedef (struct type *type, struct symbol *new_symbol,
375 struct ui_file *stream)
376 {
377 error (_("Language not supported."));
378 }
379
380 /* Print a description of a type TYPE in the form of a declaration of a
381 variable named VARSTRING. (VARSTRING is demangled if necessary.)
382 Output goes to STREAM (via stdio).
383 If SHOW is positive, we show the contents of the outermost level
384 of structure even if there is a type name that could be used instead.
385 If SHOW is negative, we never show the details of elements' types. */
386
387 void
388 type_print (struct type *type, const char *varstring, struct ui_file *stream,
389 int show)
390 {
391 LA_PRINT_TYPE (type, varstring, stream, show, 0, &default_ptype_flags);
392 }
393
394 /* Print TYPE to a string, returning it. The caller is responsible for
395 freeing the string. */
396
397 std::string
398 type_to_string (struct type *type)
399 {
400 try
401 {
402 string_file stb;
403
404 type_print (type, "", &stb, -1);
405 return std::move (stb.string ());
406 }
407 catch (const gdb_exception &except)
408 {
409 }
410
411 return {};
412 }
413
414 /* See typeprint.h. */
415
416 void
417 type_print_unknown_return_type (struct ui_file *stream)
418 {
419 fprintf_filtered (stream, _("<unknown return type>"));
420 }
421
422 /* See typeprint.h. */
423
424 void
425 error_unknown_type (const char *sym_print_name)
426 {
427 error (_("'%s' has unknown type; cast it to its declared type"),
428 sym_print_name);
429 }
430
431 /* Print type of EXP, or last thing in value history if EXP == NULL.
432 show is passed to type_print. */
433
434 static void
435 whatis_exp (const char *exp, int show)
436 {
437 struct value *val;
438 struct type *real_type = NULL;
439 struct type *type;
440 int full = 0;
441 LONGEST top = -1;
442 int using_enc = 0;
443 struct value_print_options opts;
444 struct type_print_options flags = default_ptype_flags;
445
446 if (exp)
447 {
448 if (*exp == '/')
449 {
450 int seen_one = 0;
451
452 for (++exp; *exp && !isspace (*exp); ++exp)
453 {
454 switch (*exp)
455 {
456 case 'r':
457 flags.raw = 1;
458 break;
459 case 'm':
460 flags.print_methods = 0;
461 break;
462 case 'M':
463 flags.print_methods = 1;
464 break;
465 case 't':
466 flags.print_typedefs = 0;
467 break;
468 case 'T':
469 flags.print_typedefs = 1;
470 break;
471 case 'o':
472 {
473 /* Filter out languages which don't implement the
474 feature. */
475 if (show > 0
476 && (current_language->la_language == language_c
477 || current_language->la_language == language_cplus
478 || current_language->la_language == language_rust))
479 {
480 flags.print_offsets = 1;
481 flags.print_typedefs = 0;
482 flags.print_methods = 0;
483 }
484 break;
485 }
486 default:
487 error (_("unrecognized flag '%c'"), *exp);
488 }
489 seen_one = 1;
490 }
491
492 if (!*exp && !seen_one)
493 error (_("flag expected"));
494 if (!isspace (*exp))
495 error (_("expected space after format"));
496 exp = skip_spaces (exp);
497 }
498
499 expression_up expr = parse_expression (exp);
500
501 /* The behavior of "whatis" depends on whether the user
502 expression names a type directly, or a language expression
503 (including variable names). If the former, then "whatis"
504 strips one level of typedefs, only. If an expression,
505 "whatis" prints the type of the expression without stripping
506 any typedef level. "ptype" always strips all levels of
507 typedefs. */
508 if (show == -1 && expr->elts[0].opcode == OP_TYPE)
509 {
510 /* The user expression names a type directly. */
511 type = expr->elts[1].type;
512
513 /* If this is a typedef, then find its immediate target.
514 Use check_typedef to resolve stubs, but ignore its result
515 because we do not want to dig past all typedefs. */
516 check_typedef (type);
517 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
518 type = TYPE_TARGET_TYPE (type);
519
520 /* If the expression is actually a type, then there's no
521 value to fetch the dynamic type from. */
522 val = NULL;
523 }
524 else
525 {
526 /* The user expression names a type indirectly by naming an
527 object or expression of that type. Find that
528 indirectly-named type. */
529 val = evaluate_type (expr.get ());
530 type = value_type (val);
531 }
532 }
533 else
534 {
535 val = access_value_history (0);
536 type = value_type (val);
537 }
538
539 get_user_print_options (&opts);
540 if (val != NULL && opts.objectprint)
541 {
542 if (((TYPE_CODE (type) == TYPE_CODE_PTR) || TYPE_IS_REFERENCE (type))
543 && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT))
544 real_type = value_rtti_indirect_type (val, &full, &top, &using_enc);
545 else if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
546 real_type = value_rtti_type (val, &full, &top, &using_enc);
547 }
548
549 if (flags.print_offsets
550 && (TYPE_CODE (type) == TYPE_CODE_STRUCT
551 || TYPE_CODE (type) == TYPE_CODE_UNION))
552 fprintf_filtered (gdb_stdout, "/* offset | size */ ");
553
554 printf_filtered ("type = ");
555
556 std::unique_ptr<typedef_hash_table> table_holder;
557 std::unique_ptr<ext_lang_type_printers> printer_holder;
558 if (!flags.raw)
559 {
560 table_holder.reset (new typedef_hash_table);
561 flags.global_typedefs = table_holder.get ();
562
563 printer_holder.reset (new ext_lang_type_printers);
564 flags.global_printers = printer_holder.get ();
565 }
566
567 if (real_type)
568 {
569 printf_filtered ("/* real type = ");
570 type_print (real_type, "", gdb_stdout, -1);
571 if (! full)
572 printf_filtered (" (incomplete object)");
573 printf_filtered (" */\n");
574 }
575
576 LA_PRINT_TYPE (type, "", gdb_stdout, show, 0, &flags);
577 printf_filtered ("\n");
578 }
579
580 static void
581 whatis_command (const char *exp, int from_tty)
582 {
583 /* Most of the time users do not want to see all the fields
584 in a structure. If they do they can use the "ptype" command.
585 Hence the "-1" below. */
586 whatis_exp (exp, -1);
587 }
588
589 /* TYPENAME is either the name of a type, or an expression. */
590
591 static void
592 ptype_command (const char *type_name, int from_tty)
593 {
594 whatis_exp (type_name, 1);
595 }
596
597 /* Print integral scalar data VAL, of type TYPE, onto stdio stream STREAM.
598 Used to print data from type structures in a specified type. For example,
599 array bounds may be characters or booleans in some languages, and this
600 allows the ranges to be printed in their "natural" form rather than as
601 decimal integer values.
602
603 FIXME: This is here simply because only the type printing routines
604 currently use it, and it wasn't clear if it really belonged somewhere
605 else (like printcmd.c). There are a lot of other gdb routines that do
606 something similar, but they are generally concerned with printing values
607 that come from the inferior in target byte order and target size. */
608
609 void
610 print_type_scalar (struct type *type, LONGEST val, struct ui_file *stream)
611 {
612 unsigned int i;
613 unsigned len;
614
615 type = check_typedef (type);
616
617 switch (TYPE_CODE (type))
618 {
619
620 case TYPE_CODE_ENUM:
621 len = TYPE_NFIELDS (type);
622 for (i = 0; i < len; i++)
623 {
624 if (TYPE_FIELD_ENUMVAL (type, i) == val)
625 {
626 break;
627 }
628 }
629 if (i < len)
630 {
631 fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
632 }
633 else
634 {
635 print_longest (stream, 'd', 0, val);
636 }
637 break;
638
639 case TYPE_CODE_INT:
640 print_longest (stream, TYPE_UNSIGNED (type) ? 'u' : 'd', 0, val);
641 break;
642
643 case TYPE_CODE_CHAR:
644 LA_PRINT_CHAR ((unsigned char) val, type, stream);
645 break;
646
647 case TYPE_CODE_BOOL:
648 fprintf_filtered (stream, val ? "TRUE" : "FALSE");
649 break;
650
651 case TYPE_CODE_RANGE:
652 print_type_scalar (TYPE_TARGET_TYPE (type), val, stream);
653 return;
654
655 case TYPE_CODE_UNDEF:
656 case TYPE_CODE_PTR:
657 case TYPE_CODE_ARRAY:
658 case TYPE_CODE_STRUCT:
659 case TYPE_CODE_UNION:
660 case TYPE_CODE_FUNC:
661 case TYPE_CODE_FLT:
662 case TYPE_CODE_VOID:
663 case TYPE_CODE_SET:
664 case TYPE_CODE_STRING:
665 case TYPE_CODE_ERROR:
666 case TYPE_CODE_MEMBERPTR:
667 case TYPE_CODE_METHODPTR:
668 case TYPE_CODE_METHOD:
669 case TYPE_CODE_REF:
670 case TYPE_CODE_RVALUE_REF:
671 case TYPE_CODE_NAMESPACE:
672 error (_("internal error: unhandled type in print_type_scalar"));
673 break;
674
675 default:
676 error (_("Invalid type code in symbol table."));
677 }
678 }
679
680 /* Dump details of a type specified either directly or indirectly.
681 Uses the same sort of type lookup mechanism as ptype_command()
682 and whatis_command(). */
683
684 void
685 maintenance_print_type (const char *type_name, int from_tty)
686 {
687 struct value *val;
688 struct type *type;
689
690 if (type_name != NULL)
691 {
692 expression_up expr = parse_expression (type_name);
693 if (expr->elts[0].opcode == OP_TYPE)
694 {
695 /* The user expression names a type directly, just use that type. */
696 type = expr->elts[1].type;
697 }
698 else
699 {
700 /* The user expression may name a type indirectly by naming an
701 object of that type. Find that indirectly named type. */
702 val = evaluate_type (expr.get ());
703 type = value_type (val);
704 }
705 if (type != NULL)
706 {
707 recursive_dump_type (type, 0);
708 }
709 }
710 }
711 \f
712
713 struct cmd_list_element *setprinttypelist;
714
715 struct cmd_list_element *showprinttypelist;
716
717 static void
718 set_print_type (const char *arg, int from_tty)
719 {
720 printf_unfiltered (
721 "\"set print type\" must be followed by the name of a subcommand.\n");
722 help_list (setprintlist, "set print type ", all_commands, gdb_stdout);
723 }
724
725 static void
726 show_print_type (const char *args, int from_tty)
727 {
728 cmd_show_list (showprinttypelist, from_tty, "");
729 }
730
731 static int print_methods = 1;
732
733 static void
734 set_print_type_methods (const char *args,
735 int from_tty, struct cmd_list_element *c)
736 {
737 default_ptype_flags.print_methods = print_methods;
738 }
739
740 static void
741 show_print_type_methods (struct ui_file *file, int from_tty,
742 struct cmd_list_element *c, const char *value)
743 {
744 fprintf_filtered (file, _("Printing of methods defined in a class in %s\n"),
745 value);
746 }
747
748 static int print_typedefs = 1;
749
750 static void
751 set_print_type_typedefs (const char *args,
752 int from_tty, struct cmd_list_element *c)
753 {
754 default_ptype_flags.print_typedefs = print_typedefs;
755 }
756
757 static void
758 show_print_type_typedefs (struct ui_file *file, int from_tty,
759 struct cmd_list_element *c, const char *value)
760 {
761 fprintf_filtered (file, _("Printing of typedefs defined in a class in %s\n"),
762 value);
763 }
764
765 /* Limit on the number of nested type definitions to print or -1 to print
766 all nested type definitions in a class. By default, we do not print
767 nested definitions. */
768
769 static int print_nested_type_limit = 0;
770
771 /* Set how many nested type definitions should be printed by the type
772 printer. */
773
774 static void
775 set_print_type_nested_types (const char *args, int from_tty,
776 struct cmd_list_element *c)
777 {
778 default_ptype_flags.print_nested_type_limit = print_nested_type_limit;
779 }
780
781 /* Show how many nested type definitions the type printer will print. */
782
783 static void
784 show_print_type_nested_types (struct ui_file *file, int from_tty,
785 struct cmd_list_element *c, const char *value)
786 {
787 if (*value == '0')
788 {
789 fprintf_filtered (file,
790 _("Will not print nested types defined in a class\n"));
791 }
792 else
793 {
794 fprintf_filtered (file,
795 _("Will print %s nested types defined in a class\n"),
796 value);
797 }
798 }
799
800 void
801 _initialize_typeprint (void)
802 {
803 struct cmd_list_element *c;
804
805 c = add_com ("ptype", class_vars, ptype_command, _("\
806 Print definition of type TYPE.\n\
807 Usage: ptype[/FLAGS] TYPE | EXPRESSION\n\
808 Argument may be any type (for example a type name defined by typedef,\n\
809 or \"struct STRUCT-TAG\" or \"class CLASS-NAME\" or \"union UNION-TAG\"\n\
810 or \"enum ENUM-TAG\") or an expression.\n\
811 The selected stack frame's lexical context is used to look up the name.\n\
812 Contrary to \"whatis\", \"ptype\" always unrolls any typedefs.\n\
813 \n\
814 Available FLAGS are:\n\
815 /r print in \"raw\" form; do not substitute typedefs\n\
816 /m do not print methods defined in a class\n\
817 /M print methods defined in a class\n\
818 /t do not print typedefs defined in a class\n\
819 /T print typedefs defined in a class\n\
820 /o print offsets and sizes of fields in a struct (like pahole)"));
821 set_cmd_completer (c, expression_completer);
822
823 c = add_com ("whatis", class_vars, whatis_command,
824 _("Print data type of expression EXP.\n\
825 Only one level of typedefs is unrolled. See also \"ptype\"."));
826 set_cmd_completer (c, expression_completer);
827
828 add_prefix_cmd ("type", no_class, show_print_type,
829 _("Generic command for showing type-printing settings."),
830 &showprinttypelist, "show print type ", 0, &showprintlist);
831 add_prefix_cmd ("type", no_class, set_print_type,
832 _("Generic command for setting how types print."),
833 &setprinttypelist, "set print type ", 0, &setprintlist);
834
835 add_setshow_boolean_cmd ("methods", no_class, &print_methods,
836 _("\
837 Set printing of methods defined in classes."), _("\
838 Show printing of methods defined in classes."), NULL,
839 set_print_type_methods,
840 show_print_type_methods,
841 &setprinttypelist, &showprinttypelist);
842 add_setshow_boolean_cmd ("typedefs", no_class, &print_typedefs,
843 _("\
844 Set printing of typedefs defined in classes."), _("\
845 Show printing of typedefs defined in classes."), NULL,
846 set_print_type_typedefs,
847 show_print_type_typedefs,
848 &setprinttypelist, &showprinttypelist);
849
850 add_setshow_zuinteger_unlimited_cmd ("nested-type-limit", no_class,
851 &print_nested_type_limit,
852 _("\
853 Set the number of recursive nested type definitions to print \
854 (\"unlimited\" or -1 to show all)."), _("\
855 Show the number of recursive nested type definitions to print."), NULL,
856 set_print_type_nested_types,
857 show_print_type_nested_types,
858 &setprinttypelist, &showprinttypelist);
859 }
860
861 /* Print <not allocated> status to stream STREAM. */
862
863 void
864 val_print_not_allocated (struct ui_file *stream)
865 {
866 fprintf_filtered (stream, _("<not allocated>"));
867 }
868
869 /* Print <not associated> status to stream STREAM. */
870
871 void
872 val_print_not_associated (struct ui_file *stream)
873 {
874 fprintf_filtered (stream, _("<not associated>"));
875 }