1 /* Support for printing C and C++ types for GDB, the GNU debugger.
2 Copyright 1986, 1988, 1989, 1991 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #include "bfd.h" /* Binary File Description */
25 #include "expression.h"
34 #include "typeprint.h"
39 extern int demangle; /* whether to print C++ syms raw or source-form */
42 c_type_print_args PARAMS ((struct type *, FILE *));
45 c_type_print_varspec_suffix PARAMS ((struct type *, FILE *, int, int, int));
48 cp_type_print_derivation_info PARAMS ((FILE *, struct type *));
51 c_type_print_varspec_prefix PARAMS ((struct type *, FILE *, int, int));
54 c_type_print_base PARAMS ((struct type *, FILE *, int, int));
57 /* Print a description of a type in the format of a
58 typedef for the current language.
59 NEW is the new name for a type TYPE. */
62 c_typedef_print (type, new, stream)
67 switch (current_language->la_language)
72 fprintf_filtered(stream, "typedef ");
73 type_print(type,"",stream,0);
74 if(TYPE_NAME ((SYMBOL_TYPE (new))) == 0
75 || !STREQ (TYPE_NAME ((SYMBOL_TYPE (new))), SYMBOL_NAME (new)))
76 fprintf_filtered(stream, " %s", SYMBOL_SOURCE_NAME(new));
81 fprintf_filtered(stream, "TYPE ");
82 if(!TYPE_NAME(SYMBOL_TYPE(new)) ||
83 !STREQ (TYPE_NAME(SYMBOL_TYPE(new)), SYMBOL_NAME(new)))
84 fprintf_filtered(stream, "%s = ", SYMBOL_SOURCE_NAME(new));
86 fprintf_filtered(stream, "<builtin> = ");
87 type_print(type,"",stream,0);
92 error ("Missing Chill support in function c_typedef_print."); /*FIXME*/
95 error("Language not supported.");
97 fprintf_filtered(stream, ";\n");
101 /* LEVEL is the depth to indent lines by. */
104 c_print_type (type, varstring, stream, show, level)
111 register enum type_code code;
114 c_type_print_base (type, stream, show, level);
115 code = TYPE_CODE (type);
116 if ((varstring != NULL && *varstring != '\0')
118 /* Need a space if going to print stars or brackets;
119 but not if we will print just a type name. */
120 ((show > 0 || TYPE_NAME (type) == 0)
122 (code == TYPE_CODE_PTR || code == TYPE_CODE_FUNC
123 || code == TYPE_CODE_METHOD
124 || code == TYPE_CODE_ARRAY
125 || code == TYPE_CODE_MEMBER
126 || code == TYPE_CODE_REF)))
127 fputs_filtered (" ", stream);
128 c_type_print_varspec_prefix (type, stream, show, 0);
130 fputs_filtered (varstring, stream);
132 /* For demangled function names, we have the arglist as part of the name,
133 so don't print an additional pair of ()'s */
135 demangled_args = varstring[strlen(varstring) - 1] == ')';
136 c_type_print_varspec_suffix (type, stream, show, 0, demangled_args);
140 /* Print the C++ method arguments ARGS to the file STREAM. */
143 cp_type_print_method_args (args, prefix, varstring, staticp, stream)
152 fprintf_symbol_filtered (stream, prefix, language_cplus, DMGL_ANSI);
153 fprintf_symbol_filtered (stream, varstring, language_cplus, DMGL_ANSI);
154 fputs_filtered (" (", stream);
155 if (args && args[!staticp] && args[!staticp]->code != TYPE_CODE_VOID)
157 i = !staticp; /* skip the class variable */
160 type_print (args[i++], "", stream, 0);
163 fprintf_filtered (stream, " ...");
166 else if (args[i]->code != TYPE_CODE_VOID)
168 fprintf_filtered (stream, ", ");
173 fprintf_filtered (stream, ")");
176 /* If TYPE is a derived type, then print out derivation information.
177 Print only the actual base classes of this type, not the base classes
178 of the base classes. I.E. for the derivation hierarchy:
181 class B : public A {int b; };
182 class C : public B {int c; };
184 Print the type of class C as:
190 Not as the following (like gdb used to), which is not legal C++ syntax for
191 derived types and may be confused with the multiple inheritance form:
193 class C : public B : public A {
197 In general, gdb should try to print the types as closely as possible to
198 the form that they appear in the source code. */
201 cp_type_print_derivation_info (stream, type)
208 for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
210 fputs_filtered (i == 0 ? ": " : ", ", stream);
211 fprintf_filtered (stream, "%s%s ",
212 BASETYPE_VIA_PUBLIC (type, i) ? "public" : "private",
213 BASETYPE_VIA_VIRTUAL(type, i) ? " virtual" : "");
214 name = type_name_no_tag (TYPE_BASECLASS (type, i));
215 fprintf_filtered (stream, "%s", name ? name : "(null)");
219 fputs_filtered (" ", stream);
223 /* Print any asterisks or open-parentheses needed before the
224 variable name (to describe its type).
226 On outermost call, pass 0 for PASSED_A_PTR.
227 On outermost call, SHOW > 0 means should ignore
228 any typename for TYPE and show its details.
229 SHOW is always zero on recursive calls. */
232 c_type_print_varspec_prefix (type, stream, show, passed_a_ptr)
242 if (TYPE_NAME (type) && show <= 0)
247 switch (TYPE_CODE (type))
250 c_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 1);
251 fprintf_filtered (stream, "*");
254 case TYPE_CODE_MEMBER:
256 fprintf_filtered (stream, "(");
257 c_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);
258 fprintf_filtered (stream, " ");
259 name = type_name_no_tag (TYPE_DOMAIN_TYPE (type));
261 fputs_filtered (name, stream);
263 c_type_print_base (TYPE_DOMAIN_TYPE (type), stream, 0, passed_a_ptr);
264 fprintf_filtered (stream, "::");
267 case TYPE_CODE_METHOD:
269 fprintf (stream, "(");
270 c_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);
273 fprintf_filtered (stream, " ");
274 c_type_print_base (TYPE_DOMAIN_TYPE (type), stream, 0, passed_a_ptr);
275 fprintf_filtered (stream, "::");
280 c_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 1);
281 fprintf_filtered (stream, "&");
285 c_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);
287 fprintf_filtered (stream, "(");
290 case TYPE_CODE_ARRAY:
291 c_type_print_varspec_prefix (TYPE_TARGET_TYPE (type), stream, 0, 0);
293 fprintf_filtered (stream, "(");
296 case TYPE_CODE_UNDEF:
297 case TYPE_CODE_STRUCT:
298 case TYPE_CODE_UNION:
303 case TYPE_CODE_ERROR:
307 case TYPE_CODE_RANGE:
308 case TYPE_CODE_STRING:
309 /* These types need no prefix. They are listed here so that
310 gcc -Wall will reveal any types that haven't been handled. */
316 c_type_print_args (type, stream)
323 fprintf_filtered (stream, "(");
324 args = TYPE_ARG_TYPES (type);
329 fprintf_filtered (stream, "...");
334 args[i] != NULL && args[i]->code != TYPE_CODE_VOID;
337 c_print_type (args[i], "", stream, -1, 0);
338 if (args[i+1] == NULL)
340 fprintf_filtered (stream, "...");
342 else if (args[i+1]->code != TYPE_CODE_VOID)
344 fprintf_filtered (stream, ",");
350 fprintf_filtered (stream, ")");
353 /* Print any array sizes, function arguments or close parentheses
354 needed after the variable name (to describe its type).
355 Args work like c_type_print_varspec_prefix. */
358 c_type_print_varspec_suffix (type, stream, show, passed_a_ptr, demangled_args)
368 if (TYPE_NAME (type) && show <= 0)
373 switch (TYPE_CODE (type))
375 case TYPE_CODE_ARRAY:
377 fprintf_filtered (stream, ")");
379 fprintf_filtered (stream, "[");
380 if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
381 fprintf_filtered (stream, "%d",
383 / TYPE_LENGTH (TYPE_TARGET_TYPE (type))));
384 fprintf_filtered (stream, "]");
386 c_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 0, 0);
389 case TYPE_CODE_MEMBER:
391 fprintf_filtered (stream, ")");
392 c_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 0, 0);
395 case TYPE_CODE_METHOD:
397 fprintf_filtered (stream, ")");
398 c_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 0, 0);
401 c_type_print_args (type, stream);
407 c_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0, 1, 0);
411 c_type_print_varspec_suffix (TYPE_TARGET_TYPE (type), stream, 0,
414 fprintf_filtered (stream, ")");
416 fprintf_filtered (stream, "()");
419 case TYPE_CODE_UNDEF:
420 case TYPE_CODE_STRUCT:
421 case TYPE_CODE_UNION:
426 case TYPE_CODE_ERROR:
430 case TYPE_CODE_RANGE:
431 case TYPE_CODE_STRING:
432 /* These types do not need a suffix. They are listed so that
433 gcc -Wall will report types that may not have been considered. */
438 /* Print the name of the type (or the ultimate pointer target,
439 function value or array element), or the description of a
442 SHOW nonzero means don't print this type as just its name;
443 show its real definition even if it has a name.
444 SHOW zero means print just typename or struct tag if there is one
445 SHOW negative means abbreviate structure elements.
446 SHOW is decremented for printing of structure elements.
448 LEVEL is the depth to indent by.
449 We increase it for some recursive calls. */
452 c_type_print_base (type, stream, show, level)
461 register int lastval;
463 char *demangled_name;
464 enum {s_none, s_public, s_private, s_protected} section_type;
470 fputs_filtered ("<type unknown>", stream);
474 /* When SHOW is zero or less, and there is a valid type name, then always
475 just print the type name directly from the type. */
477 if ((show <= 0) && (TYPE_NAME (type) != NULL))
479 fputs_filtered (TYPE_NAME (type), stream);
483 switch (TYPE_CODE (type))
485 case TYPE_CODE_ARRAY:
487 case TYPE_CODE_MEMBER:
490 case TYPE_CODE_METHOD:
491 c_type_print_base (TYPE_TARGET_TYPE (type), stream, show, level);
494 case TYPE_CODE_STRUCT:
495 if (HAVE_CPLUS_STRUCT (type))
497 /* Always print it as "class foo" even if foo is a typedef'd
499 fprintf_filtered (stream, "class ");
500 name = type_name_no_tag (type);
503 fputs_filtered (name, stream);
504 fputs_filtered (" ", stream);
510 fprintf_filtered (stream, "struct ");
511 name = TYPE_NAME (type);
512 /* If the name does not start with "struct " it means that the
513 type was defined without a tag, so don't print a tag. It is
514 possible that we should have a better way of distinguising
515 tag names from typedef'd names. (e.g. a new tagname field in
517 if (name != NULL && strncmp (name, "struct ", 7) == 0)
519 fputs_filtered (name + 7, stream);
520 fputs_filtered (" ", stream);
525 case TYPE_CODE_UNION:
526 fprintf_filtered (stream, "union ");
527 if (HAVE_CPLUS_STRUCT (type))
529 /* Always print it as "union foo" even if foo is a typedef'd
531 name = type_name_no_tag (type);
534 fputs_filtered (name, stream);
535 fputs_filtered (" ", stream);
541 name = TYPE_NAME (type);
542 /* If the name does not start with "union " it means that the
543 type was defined without a tag, so don't print a tag. It is
544 possible that we should have a better way of distinguising
545 tag names from typedef'd names. (e.g. a new tagname field in
547 if (name != NULL && strncmp (name, "union ", 6) == 0)
549 fputs_filtered (name + 6, stream);
550 fputs_filtered (" ", stream);
556 fprintf_filtered (stream, "{...}");
559 check_stub_type (type);
561 cp_type_print_derivation_info (stream, type);
563 fprintf_filtered (stream, "{\n");
564 if ((TYPE_NFIELDS (type) == 0) && (TYPE_NFN_FIELDS (type) == 0))
566 if (TYPE_FLAGS (type) & TYPE_FLAG_STUB)
567 fprintfi_filtered (level + 4, stream, "<incomplete type>\n");
569 fprintfi_filtered (level + 4, stream, "<no data fields>\n");
572 /* Start off with no specific section type, so we can print
573 one for the first field we find, and use that section type
574 thereafter until we find another type. */
576 section_type = s_none;
578 /* If there is a base class for this type,
579 do not print the field that it occupies. */
581 len = TYPE_NFIELDS (type);
582 for (i = TYPE_N_BASECLASSES (type); i < len; i++)
585 /* Don't print out virtual function table. */
586 if ((TYPE_FIELD_NAME (type, i))[5] == CPLUS_MARKER &&
587 !strncmp (TYPE_FIELD_NAME (type, i), "_vptr", 5))
590 /* If this is a C++ class we can print the various C++ section
593 if (HAVE_CPLUS_STRUCT (type))
595 if (TYPE_FIELD_PROTECTED (type, i))
597 if (section_type != s_protected)
599 section_type = s_protected;
600 fprintfi_filtered (level + 2, stream,
604 else if (TYPE_FIELD_PRIVATE (type, i))
606 if (section_type != s_private)
608 section_type = s_private;
609 fprintfi_filtered (level + 2, stream, "private:\n");
614 if (section_type != s_public)
616 section_type = s_public;
617 fprintfi_filtered (level + 2, stream, "public:\n");
622 print_spaces_filtered (level + 4, stream);
623 if (TYPE_FIELD_STATIC (type, i))
625 fprintf_filtered (stream, "static ");
627 c_print_type (TYPE_FIELD_TYPE (type, i),
628 TYPE_FIELD_NAME (type, i),
629 stream, show - 1, level + 4);
630 if (!TYPE_FIELD_STATIC (type, i)
631 && TYPE_FIELD_PACKED (type, i))
633 /* It is a bitfield. This code does not attempt
634 to look at the bitpos and reconstruct filler,
635 unnamed fields. This would lead to misleading
636 results if the compiler does not put out fields
637 for such things (I don't know what it does). */
638 fprintf_filtered (stream, " : %d",
639 TYPE_FIELD_BITSIZE (type, i));
641 fprintf_filtered (stream, ";\n");
644 /* If there are both fields and methods, put a space between. */
645 len = TYPE_NFN_FIELDS (type);
646 if (len && section_type != s_none)
647 fprintf_filtered (stream, "\n");
649 /* C++: print out the methods */
651 for (i = 0; i < len; i++)
653 struct fn_field *f = TYPE_FN_FIELDLIST1 (type, i);
654 int j, len2 = TYPE_FN_FIELDLIST_LENGTH (type, i);
655 char *method_name = TYPE_FN_FIELDLIST_NAME (type, i);
656 int is_constructor = name && STREQ(method_name, name);
657 for (j = 0; j < len2; j++)
660 if (TYPE_FN_FIELD_PROTECTED (f, j))
662 if (section_type != s_protected)
664 section_type = s_protected;
665 fprintfi_filtered (level + 2, stream,
669 else if (TYPE_FN_FIELD_PRIVATE (f, j))
671 if (section_type != s_private)
673 section_type = s_private;
674 fprintfi_filtered (level + 2, stream, "private:\n");
679 if (section_type != s_public)
681 section_type = s_public;
682 fprintfi_filtered (level + 2, stream, "public:\n");
686 print_spaces_filtered (level + 4, stream);
687 if (TYPE_FN_FIELD_VIRTUAL_P (f, j))
688 fprintf_filtered (stream, "virtual ");
689 else if (TYPE_FN_FIELD_STATIC_P (f, j))
690 fprintf_filtered (stream, "static ");
691 if (TYPE_TARGET_TYPE (TYPE_FN_FIELD_TYPE (f, j)) == 0)
693 /* Keep GDB from crashing here. */
694 fprintf (stream, "<undefined type> %s;\n",
695 TYPE_FN_FIELD_PHYSNAME (f, j));
698 else if (!is_constructor)
700 type_print (TYPE_TARGET_TYPE (TYPE_FN_FIELD_TYPE (f, j)),
702 fputs_filtered (" ", stream);
704 if (TYPE_FN_FIELD_STUB (f, j))
706 /* Build something we can demangle. */
707 mangled_name = gdb_mangle_name (type, i, j);
709 cplus_demangle (mangled_name,
710 DMGL_ANSI | DMGL_PARAMS);
711 if (demangled_name == NULL)
712 fprintf_filtered (stream, "<badly mangled name %s>",
716 fprintf_filtered (stream, "%s",
717 strchr (demangled_name, ':') + 2);
718 free (demangled_name);
722 else if (TYPE_FN_FIELD_PHYSNAME (f, j)[0] == '_'
723 && TYPE_FN_FIELD_PHYSNAME (f, j)[1] == CPLUS_MARKER)
724 cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j) + 1,
725 "~", method_name, 0, stream);
727 cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j), "",
729 TYPE_FN_FIELD_STATIC_P (f, j),
732 fprintf_filtered (stream, ";\n");
736 fprintfi_filtered (level, stream, "}");
741 fprintf_filtered (stream, "enum ");
742 name = TYPE_NAME (type);
744 /* If the name does not start with "enum " it means that the
745 type was defined without a tag, so don't print a tag. It is
746 possible that we should have a better way of distinguising
747 tag names from typedef'd names. (e.g. a new tagname field in
749 if (name != NULL && strncmp (name, "enum ", 5) == 0)
751 fputs_filtered (name + 5, stream);
752 fputs_filtered (" ", stream);
757 fprintf_filtered (stream, "{...}");
760 fprintf_filtered (stream, "{");
761 len = TYPE_NFIELDS (type);
763 for (i = 0; i < len; i++)
766 if (i) fprintf_filtered (stream, ", ");
768 fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
769 if (lastval != TYPE_FIELD_BITPOS (type, i))
771 fprintf_filtered (stream, " = %d", TYPE_FIELD_BITPOS (type, i));
772 lastval = TYPE_FIELD_BITPOS (type, i);
776 fprintf_filtered (stream, "}");
781 fprintf_filtered (stream, "void");
784 case TYPE_CODE_UNDEF:
785 fprintf_filtered (stream, "struct <unknown>");
788 case TYPE_CODE_ERROR:
789 fprintf_filtered (stream, "<unknown type>");
792 case TYPE_CODE_RANGE:
793 /* This should not occur */
794 fprintf_filtered (stream, "<range type>");
798 /* Handle types not explicitly handled by the other cases,
799 such as fundamental types. For these, just print whatever
800 the type name is, as recorded in the type itself. If there
801 is no type name, then complain. */
802 if (TYPE_NAME (type) != NULL)
804 fputs_filtered (TYPE_NAME (type), stream);
808 error ("Invalid type code (%d) in symbol table.", TYPE_CODE (type));