1 /* Support for printing Ada types for GDB, the GNU debugger.
2 Copyright (C) 1986, 1988, 1989, 1991, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2007, 2008, 2009 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/>. */
21 #include "gdb_obstack.h"
22 #include "bfd.h" /* Binary File Description */
25 #include "expression.h"
34 #include "typeprint.h"
38 #include "gdb_string.h"
41 static int print_record_field_types (struct type
*, struct type
*,
42 struct ui_file
*, int, int);
44 static void print_array_type (struct type
*, struct ui_file
*, int, int);
46 static void print_choices (struct type
*, int, struct ui_file
*,
49 static void print_range (struct type
*, struct ui_file
*);
51 static void print_range_bound (struct type
*, char *, int *,
55 print_dynamic_range_bound (struct type
*, const char *, int,
56 const char *, struct ui_file
*);
58 static void print_range_type_named (char *, struct type
*, struct ui_file
*);
62 static char *name_buffer
;
63 static int name_buffer_len
;
65 /* The (decoded) Ada name of TYPE. This value persists until the
69 decoded_type_name (struct type
*type
)
71 if (ada_type_name (type
) == NULL
)
75 char *raw_name
= ada_type_name (type
);
78 if (name_buffer
== NULL
|| name_buffer_len
<= strlen (raw_name
))
80 name_buffer_len
= 16 + 2 * strlen (raw_name
);
81 name_buffer
= xrealloc (name_buffer
, name_buffer_len
);
83 strcpy (name_buffer
, raw_name
);
85 s
= (char *) strstr (name_buffer
, "___");
89 s
= name_buffer
+ strlen (name_buffer
) - 1;
90 while (s
> name_buffer
&& (s
[0] != '_' || s
[-1] != '_'))
99 for (s
= q
= name_buffer
; *s
!= '\0'; q
+= 1)
101 if (s
[0] == '_' && s
[1] == '_')
117 /* Print range type TYPE on STREAM. */
120 print_range (struct type
*type
, struct ui_file
*stream
)
122 struct type
*target_type
;
123 target_type
= TYPE_TARGET_TYPE (type
);
124 if (target_type
== NULL
)
127 switch (TYPE_CODE (target_type
))
129 case TYPE_CODE_RANGE
:
140 if (TYPE_NFIELDS (type
) < 2)
142 /* A range needs at least 2 bounds to be printed. If there are less
143 than 2, just print the type name instead of the range itself.
144 This check handles cases such as characters, for example.
146 If the name is not defined, then we don't print anything.
148 fprintf_filtered (stream
, "%.*s",
149 ada_name_prefix_len (TYPE_NAME (type
)),
154 /* We extract the range type bounds respectively from the first element
155 and the last element of the type->fields array */
156 const LONGEST lower_bound
= (LONGEST
) TYPE_LOW_BOUND (type
);
157 const LONGEST upper_bound
= (TYPE_CODE (type
) == TYPE_CODE_RANGE
158 ? (LONGEST
) TYPE_HIGH_BOUND (type
)
159 : (LONGEST
) TYPE_FIELD_BITPOS (type
, TYPE_NFIELDS (type
) - 1));
161 ada_print_scalar (target_type
, lower_bound
, stream
);
162 fprintf_filtered (stream
, " .. ");
163 ada_print_scalar (target_type
, upper_bound
, stream
);
167 /* Print the number or discriminant bound at BOUNDS+*N on STREAM, and
168 set *N past the bound and its delimiter, if any. */
171 print_range_bound (struct type
*type
, char *bounds
, int *n
,
172 struct ui_file
*stream
)
175 if (ada_scan_number (bounds
, *n
, &B
, n
))
177 /* STABS decodes all range types which bounds are 0 .. -1 as
178 unsigned integers (ie. the type code is TYPE_CODE_INT, not
179 TYPE_CODE_RANGE). Unfortunately, ada_print_scalar() relies
180 on the unsigned flag to determine whether the bound should
181 be printed as a signed or an unsigned value. This causes
182 the upper bound of the 0 .. -1 range types to be printed as
183 a very large unsigned number instead of -1.
184 To workaround this stabs deficiency, we replace the TYPE by NULL
185 to indicate default output when we detect that the bound is negative,
186 and the type is a TYPE_CODE_INT. The bound is negative when
187 'm' is the last character of the number scanned in BOUNDS. */
188 if (bounds
[*n
- 1] == 'm' && TYPE_CODE (type
) == TYPE_CODE_INT
)
190 ada_print_scalar (type
, B
, stream
);
191 if (bounds
[*n
] == '_')
197 char *bound
= bounds
+ *n
;
200 pend
= strstr (bound
, "__");
202 *n
+= bound_len
= strlen (bound
);
205 bound_len
= pend
- bound
;
208 fprintf_filtered (stream
, "%.*s", bound_len
, bound
);
212 /* Assuming NAME[0 .. NAME_LEN-1] is the name of a range type, print
213 the value (if found) of the bound indicated by SUFFIX ("___L" or
214 "___U") according to the ___XD conventions. */
217 print_dynamic_range_bound (struct type
*type
, const char *name
, int name_len
,
218 const char *suffix
, struct ui_file
*stream
)
220 static char *name_buf
= NULL
;
221 static size_t name_buf_len
= 0;
225 GROW_VECT (name_buf
, name_buf_len
, name_len
+ strlen (suffix
) + 1);
226 strncpy (name_buf
, name
, name_len
);
227 strcpy (name_buf
+ name_len
, suffix
);
229 B
= get_int_var_value (name_buf
, &OK
);
231 ada_print_scalar (type
, B
, stream
);
233 fprintf_filtered (stream
, "?");
236 /* Print the range type named NAME. If symbol lookup fails, fall back
237 to ORIG_TYPE as base type. */
240 print_range_type_named (char *name
, struct type
*orig_type
,
241 struct ui_file
*stream
)
243 struct type
*raw_type
= ada_find_any_type (name
);
244 struct type
*base_type
;
247 if (raw_type
== NULL
)
248 raw_type
= orig_type
;
250 if (TYPE_CODE (raw_type
) == TYPE_CODE_RANGE
)
251 base_type
= TYPE_TARGET_TYPE (raw_type
);
253 base_type
= raw_type
;
255 subtype_info
= strstr (name
, "___XD");
256 if (subtype_info
== NULL
)
257 print_range (raw_type
, stream
);
260 int prefix_len
= subtype_info
- name
;
265 bounds_str
= strchr (subtype_info
, '_');
268 if (*subtype_info
== 'L')
270 print_range_bound (base_type
, bounds_str
, &n
, stream
);
274 print_dynamic_range_bound (base_type
, name
, prefix_len
, "___L",
277 fprintf_filtered (stream
, " .. ");
279 if (*subtype_info
== 'U')
280 print_range_bound (base_type
, bounds_str
, &n
, stream
);
282 print_dynamic_range_bound (base_type
, name
, prefix_len
, "___U",
287 /* Print enumerated type TYPE on STREAM. */
290 print_enum_type (struct type
*type
, struct ui_file
*stream
)
292 int len
= TYPE_NFIELDS (type
);
295 fprintf_filtered (stream
, "(");
299 for (i
= 0; i
< len
; i
++)
303 fprintf_filtered (stream
, ", ");
305 fputs_filtered (ada_enum_name (TYPE_FIELD_NAME (type
, i
)), stream
);
306 if (lastval
!= TYPE_FIELD_BITPOS (type
, i
))
308 fprintf_filtered (stream
, " => %d", TYPE_FIELD_BITPOS (type
, i
));
309 lastval
= TYPE_FIELD_BITPOS (type
, i
);
313 fprintf_filtered (stream
, ")");
316 /* Print representation of Ada fixed-point type TYPE on STREAM. */
319 print_fixed_point_type (struct type
*type
, struct ui_file
*stream
)
321 DOUBLEST delta
= ada_delta (type
);
322 DOUBLEST small
= ada_fixed_to_float (type
, 1.0);
325 fprintf_filtered (stream
, "delta ??");
328 fprintf_filtered (stream
, "delta %g", (double) delta
);
330 fprintf_filtered (stream
, " <'small = %g>", (double) small
);
334 /* Print representation of special VAX floating-point type TYPE on STREAM. */
337 print_vax_floating_point_type (struct type
*type
, struct ui_file
*stream
)
339 fprintf_filtered (stream
, "<float format %c>",
340 ada_vax_float_type_suffix (type
));
343 /* Print simple (constrained) array type TYPE on STREAM. LEVEL is the
344 recursion (indentation) level, in case the element type itself has
345 nested structure, and SHOW is the number of levels of internal
346 structure to show (see ada_print_type). */
349 print_array_type (struct type
*type
, struct ui_file
*stream
, int show
,
355 if (ada_is_packed_array_type (type
))
356 type
= ada_coerce_to_simple_array_type (type
);
359 fprintf_filtered (stream
, "array (");
363 fprintf_filtered (stream
, _("<undecipherable array type>"));
369 fprintf_filtered (stream
, "...");
372 if (ada_is_simple_array_type (type
))
374 struct type
*range_desc_type
=
375 ada_find_parallel_type (type
, "___XA");
376 struct type
*arr_type
;
379 if (range_desc_type
== NULL
)
381 for (arr_type
= type
; TYPE_CODE (arr_type
) == TYPE_CODE_ARRAY
;
382 arr_type
= TYPE_TARGET_TYPE (arr_type
))
384 if (arr_type
!= type
)
385 fprintf_filtered (stream
, ", ");
386 print_range (TYPE_INDEX_TYPE (arr_type
), stream
);
387 if (TYPE_FIELD_BITSIZE (arr_type
, 0) > 0)
388 bitsize
= TYPE_FIELD_BITSIZE (arr_type
, 0);
394 n_indices
= TYPE_NFIELDS (range_desc_type
);
395 for (k
= 0, arr_type
= type
;
397 k
+= 1, arr_type
= TYPE_TARGET_TYPE (arr_type
))
400 fprintf_filtered (stream
, ", ");
401 print_range_type_named (TYPE_FIELD_NAME
402 (range_desc_type
, k
),
403 TYPE_INDEX_TYPE (arr_type
), stream
);
404 if (TYPE_FIELD_BITSIZE (arr_type
, 0) > 0)
405 bitsize
= TYPE_FIELD_BITSIZE (arr_type
, 0);
412 for (i
= i0
= ada_array_arity (type
); i
> 0; i
-= 1)
413 fprintf_filtered (stream
, "%s<>", i
== i0
? "" : ", ");
417 fprintf_filtered (stream
, ") of ");
419 ada_print_type (ada_array_element_type (type
, n_indices
), "", stream
,
420 show
== 0 ? 0 : show
- 1, level
+ 1);
422 fprintf_filtered (stream
, " <packed: %d-bit elements>", bitsize
);
425 /* Print the choices encoded by field FIELD_NUM of variant-part TYPE on
426 STREAM, assuming that VAL_TYPE (if non-NULL) is the type of the values. */
429 print_choices (struct type
*type
, int field_num
, struct ui_file
*stream
,
430 struct type
*val_type
)
434 const char *name
= TYPE_FIELD_NAME (type
, field_num
);
438 /* Skip over leading 'V': NOTE soon to be obsolete. */
441 if (!ada_scan_number (name
, 1, NULL
, &p
))
457 fprintf_filtered (stream
, " | ");
467 if (!ada_scan_number (name
, p
+ 1, &W
, &p
))
469 ada_print_scalar (val_type
, W
, stream
);
475 if (!ada_scan_number (name
, p
+ 1, &L
, &p
)
476 || name
[p
] != 'T' || !ada_scan_number (name
, p
+ 1, &U
, &p
))
478 ada_print_scalar (val_type
, L
, stream
);
479 fprintf_filtered (stream
, " .. ");
480 ada_print_scalar (val_type
, U
, stream
);
484 fprintf_filtered (stream
, "others");
491 fprintf_filtered (stream
, "??");
495 /* Assuming that field FIELD_NUM of TYPE is a VARIANTS field whose
496 discriminant is contained in OUTER_TYPE, print its variants on STREAM.
497 LEVEL is the recursion
498 (indentation) level, in case any of the fields themselves have
499 nested structure, and SHOW is the number of levels of internal structure
500 to show (see ada_print_type). For this purpose, fields nested in a
501 variant part are taken to be at the same level as the fields
502 immediately outside the variant part. */
505 print_variant_clauses (struct type
*type
, int field_num
,
506 struct type
*outer_type
, struct ui_file
*stream
,
510 struct type
*var_type
, *par_type
;
511 struct type
*discr_type
;
513 var_type
= TYPE_FIELD_TYPE (type
, field_num
);
514 discr_type
= ada_variant_discrim_type (var_type
, outer_type
);
516 if (TYPE_CODE (var_type
) == TYPE_CODE_PTR
)
518 var_type
= TYPE_TARGET_TYPE (var_type
);
519 if (var_type
== NULL
|| TYPE_CODE (var_type
) != TYPE_CODE_UNION
)
523 par_type
= ada_find_parallel_type (var_type
, "___XVU");
524 if (par_type
!= NULL
)
527 for (i
= 0; i
< TYPE_NFIELDS (var_type
); i
+= 1)
529 fprintf_filtered (stream
, "\n%*swhen ", level
+ 4, "");
530 print_choices (var_type
, i
, stream
, discr_type
);
531 fprintf_filtered (stream
, " =>");
532 if (print_record_field_types (TYPE_FIELD_TYPE (var_type
, i
),
533 outer_type
, stream
, show
, level
+ 4) <= 0)
534 fprintf_filtered (stream
, " null;");
538 /* Assuming that field FIELD_NUM of TYPE is a variant part whose
539 discriminants are contained in OUTER_TYPE, print a description of it
540 on STREAM. LEVEL is the recursion (indentation) level, in case any of
541 the fields themselves have nested structure, and SHOW is the number of
542 levels of internal structure to show (see ada_print_type). For this
543 purpose, fields nested in a variant part are taken to be at the same
544 level as the fields immediately outside the variant part. */
547 print_variant_part (struct type
*type
, int field_num
, struct type
*outer_type
,
548 struct ui_file
*stream
, int show
, int level
)
550 fprintf_filtered (stream
, "\n%*scase %s is", level
+ 4, "",
551 ada_variant_discrim_name
552 (TYPE_FIELD_TYPE (type
, field_num
)));
553 print_variant_clauses (type
, field_num
, outer_type
, stream
, show
,
555 fprintf_filtered (stream
, "\n%*send case;", level
+ 4, "");
558 /* Print a description on STREAM of the fields in record type TYPE, whose
559 discriminants are in OUTER_TYPE. LEVEL is the recursion (indentation)
560 level, in case any of the fields themselves have nested structure,
561 and SHOW is the number of levels of internal structure to show
562 (see ada_print_type). Does not print parent type information of TYPE.
563 Returns 0 if no fields printed, -1 for an incomplete type, else > 0.
564 Prints each field beginning on a new line, but does not put a new line at
568 print_record_field_types (struct type
*type
, struct type
*outer_type
,
569 struct ui_file
*stream
, int show
, int level
)
574 len
= TYPE_NFIELDS (type
);
576 if (len
== 0 && TYPE_STUB (type
))
579 for (i
= 0; i
< len
; i
+= 1)
583 if (ada_is_parent_field (type
, i
) || ada_is_ignored_field (type
, i
))
585 else if (ada_is_wrapper_field (type
, i
))
586 flds
+= print_record_field_types (TYPE_FIELD_TYPE (type
, i
), type
,
587 stream
, show
, level
);
588 else if (ada_is_variant_part (type
, i
))
590 print_variant_part (type
, i
, outer_type
, stream
, show
, level
);
596 fprintf_filtered (stream
, "\n%*s", level
+ 4, "");
597 ada_print_type (TYPE_FIELD_TYPE (type
, i
),
598 TYPE_FIELD_NAME (type
, i
),
599 stream
, show
- 1, level
+ 4);
600 fprintf_filtered (stream
, ";");
607 /* Print record type TYPE on STREAM. LEVEL is the recursion (indentation)
608 level, in case the element type itself has nested structure, and SHOW is
609 the number of levels of internal structure to show (see ada_print_type). */
612 print_record_type (struct type
*type0
, struct ui_file
*stream
, int show
,
615 struct type
*parent_type
;
618 type
= ada_find_parallel_type (type0
, "___XVE");
622 parent_type
= ada_parent_type (type
);
623 if (ada_type_name (parent_type
) != NULL
)
624 fprintf_filtered (stream
, "new %s with record",
625 decoded_type_name (parent_type
));
626 else if (parent_type
== NULL
&& ada_is_tagged_type (type
, 0))
627 fprintf_filtered (stream
, "tagged record");
629 fprintf_filtered (stream
, "record");
632 fprintf_filtered (stream
, " ... end record");
638 if (parent_type
!= NULL
&& ada_type_name (parent_type
) == NULL
)
639 flds
+= print_record_field_types (parent_type
, parent_type
,
640 stream
, show
, level
);
641 flds
+= print_record_field_types (type
, type
, stream
, show
, level
);
644 fprintf_filtered (stream
, "\n%*send record", level
, "");
646 fprintf_filtered (stream
, _(" <incomplete type> end record"));
648 fprintf_filtered (stream
, " null; end record");
652 /* Print the unchecked union type TYPE in something resembling Ada
653 format on STREAM. LEVEL is the recursion (indentation) level
654 in case the element type itself has nested structure, and SHOW is the
655 number of levels of internal structure to show (see ada_print_type). */
657 print_unchecked_union_type (struct type
*type
, struct ui_file
*stream
,
661 fprintf_filtered (stream
, "record (?) is ... end record");
662 else if (TYPE_NFIELDS (type
) == 0)
663 fprintf_filtered (stream
, "record (?) is null; end record");
668 fprintf_filtered (stream
, "record (?) is\n%*scase ? is", level
+ 4, "");
670 for (i
= 0; i
< TYPE_NFIELDS (type
); i
+= 1)
672 fprintf_filtered (stream
, "\n%*swhen ? =>\n%*s", level
+ 8, "",
674 ada_print_type (TYPE_FIELD_TYPE (type
, i
),
675 TYPE_FIELD_NAME (type
, i
),
676 stream
, show
- 1, level
+ 12);
677 fprintf_filtered (stream
, ";");
680 fprintf_filtered (stream
, "\n%*send case;\n%*send record",
681 level
+ 4, "", level
, "");
687 /* Print function or procedure type TYPE on STREAM. Make it a header
688 for function or procedure NAME if NAME is not null. */
691 print_func_type (struct type
*type
, struct ui_file
*stream
, char *name
)
693 int i
, len
= TYPE_NFIELDS (type
);
695 if (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_VOID
)
696 fprintf_filtered (stream
, "procedure");
698 fprintf_filtered (stream
, "function");
700 if (name
!= NULL
&& name
[0] != '\0')
701 fprintf_filtered (stream
, " %s", name
);
705 fprintf_filtered (stream
, " (");
706 for (i
= 0; i
< len
; i
+= 1)
710 fputs_filtered ("; ", stream
);
713 fprintf_filtered (stream
, "a%d: ", i
+ 1);
714 ada_print_type (TYPE_FIELD_TYPE (type
, i
), "", stream
, -1, 0);
716 fprintf_filtered (stream
, ")");
719 if (TYPE_CODE (TYPE_TARGET_TYPE (type
)) != TYPE_CODE_VOID
)
721 fprintf_filtered (stream
, " return ");
722 ada_print_type (TYPE_TARGET_TYPE (type
), "", stream
, 0, 0);
727 /* Print a description of a type TYPE0.
728 Output goes to STREAM (via stdio).
729 If VARSTRING is a non-empty string, print as an Ada variable/field
731 SHOW+1 is the maximum number of levels of internal type structure
732 to show (this applies to record types, enumerated types, and
734 SHOW is the number of levels of internal type structure to show
735 when there is a type name for the SHOWth deepest level (0th is
737 When SHOW<0, no inner structure is shown.
738 LEVEL indicates level of recursion (for nested definitions). */
741 ada_print_type (struct type
*type0
, char *varstring
, struct ui_file
*stream
,
744 struct type
*type
= ada_check_typedef (ada_get_base_type (type0
));
745 char *type_name
= decoded_type_name (type0
);
746 int is_var_decl
= (varstring
!= NULL
&& varstring
[0] != '\0');
751 fprintf_filtered (stream
, "%.*s: ",
752 ada_name_prefix_len (varstring
), varstring
);
753 fprintf_filtered (stream
, "<null type?>");
758 type
= ada_check_typedef (type
);
760 if (is_var_decl
&& TYPE_CODE (type
) != TYPE_CODE_FUNC
)
761 fprintf_filtered (stream
, "%.*s: ",
762 ada_name_prefix_len (varstring
), varstring
);
764 if (type_name
!= NULL
&& show
<= 0)
766 fprintf_filtered (stream
, "%.*s",
767 ada_name_prefix_len (type_name
), type_name
);
771 if (ada_is_aligner_type (type
))
772 ada_print_type (ada_aligned_type (type
), "", stream
, show
, level
);
773 else if (ada_is_packed_array_type (type
))
775 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
777 fprintf_filtered (stream
, "access ");
778 print_array_type (TYPE_TARGET_TYPE (type
), stream
, show
, level
);
782 print_array_type (type
, stream
, show
, level
);
786 switch (TYPE_CODE (type
))
789 fprintf_filtered (stream
, "<");
790 c_print_type (type
, "", stream
, show
, level
);
791 fprintf_filtered (stream
, ">");
794 fprintf_filtered (stream
, "access ");
795 ada_print_type (TYPE_TARGET_TYPE (type
), "", stream
, show
, level
);
798 fprintf_filtered (stream
, "<ref> ");
799 ada_print_type (TYPE_TARGET_TYPE (type
), "", stream
, show
, level
);
801 case TYPE_CODE_ARRAY
:
802 print_array_type (type
, stream
, show
, level
);
805 fprintf_filtered (stream
, "(false, true)");
808 if (ada_is_fixed_point_type (type
))
809 print_fixed_point_type (type
, stream
);
810 else if (ada_is_vax_floating_type (type
))
811 print_vax_floating_point_type (type
, stream
);
814 char *name
= ada_type_name (type
);
815 if (!ada_is_range_type_name (name
))
816 fprintf_filtered (stream
, _("<%d-byte integer>"),
820 fprintf_filtered (stream
, "range ");
821 print_range_type_named (name
, type
, stream
);
825 case TYPE_CODE_RANGE
:
826 if (ada_is_fixed_point_type (type
))
827 print_fixed_point_type (type
, stream
);
828 else if (ada_is_vax_floating_type (type
))
829 print_vax_floating_point_type (type
, stream
);
830 else if (ada_is_modular_type (type
))
831 fprintf_filtered (stream
, "mod %s",
832 int_string (ada_modulus (type
), 10, 0, 0, 1));
835 fprintf_filtered (stream
, "range ");
836 print_range (type
, stream
);
840 fprintf_filtered (stream
, _("<%d-byte float>"), TYPE_LENGTH (type
));
844 fprintf_filtered (stream
, "(...)");
846 print_enum_type (type
, stream
);
848 case TYPE_CODE_STRUCT
:
849 if (ada_is_array_descriptor_type (type
))
850 print_array_type (type
, stream
, show
, level
);
851 else if (ada_is_bogus_array_descriptor (type
))
852 fprintf_filtered (stream
,
853 _("array (?) of ? (<mal-formed descriptor>)"));
855 print_record_type (type
, stream
, show
, level
);
857 case TYPE_CODE_UNION
:
858 print_unchecked_union_type (type
, stream
, show
, level
);
861 print_func_type (type
, stream
, varstring
);
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