1 /* Support for printing Ada types for GDB, the GNU debugger.
2 Copyright (C) 1986, 1988, 1989, 1991, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004 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 2 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, write to the Free Software
19 Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
23 #include "gdb_obstack.h"
24 #include "bfd.h" /* Binary File Description */
27 #include "expression.h"
36 #include "typeprint.h"
40 #include "gdb_string.h"
43 static int print_record_field_types (struct type
*, struct type
*,
44 struct ui_file
*, int, int);
46 static void print_array_type (struct type
*, struct ui_file
*, int, int);
48 static void print_choices (struct type
*, int, struct ui_file
*,
51 static void print_range (struct type
*, struct ui_file
*);
53 static void print_range_bound (struct type
*, char *, int *,
57 print_dynamic_range_bound (struct type
*, const char *, int,
58 const char *, struct ui_file
*);
60 static void print_range_type_named (char *, struct ui_file
*);
64 static char *name_buffer
;
65 static int name_buffer_len
;
67 /* The (decoded) Ada name of TYPE. This value persists until the
71 decoded_type_name (struct type
*type
)
73 if (ada_type_name (type
) == NULL
)
77 char *raw_name
= ada_type_name (type
);
80 if (name_buffer
== NULL
|| name_buffer_len
<= strlen (raw_name
))
82 name_buffer_len
= 16 + 2 * strlen (raw_name
);
83 name_buffer
= xrealloc (name_buffer
, name_buffer_len
);
85 strcpy (name_buffer
, raw_name
);
87 s
= (char *) strstr (name_buffer
, "___");
91 s
= name_buffer
+ strlen (name_buffer
) - 1;
92 while (s
> name_buffer
&& (s
[0] != '_' || s
[-1] != '_'))
101 for (s
= q
= name_buffer
; *s
!= '\0'; q
+= 1)
103 if (s
[0] == '_' && s
[1] == '_')
120 /* Print a description of a type in the format of a
121 typedef for the current language.
122 NEW is the new name for a type TYPE. */
125 ada_typedef_print (struct type
*type
, struct symbol
*new,
126 struct ui_file
*stream
)
128 /* XXX: type_sprint */
129 fprintf_filtered (stream
, "type %.*s is ",
130 ada_name_prefix_len (SYMBOL_PRINT_NAME (new)),
131 SYMBOL_PRINT_NAME (new));
132 type_print (type
, "", stream
, 1);
135 /* Print range type TYPE on STREAM. */
138 print_range (struct type
*type
, struct ui_file
*stream
)
140 struct type
*target_type
;
141 target_type
= TYPE_TARGET_TYPE (type
);
142 if (target_type
== NULL
)
145 switch (TYPE_CODE (target_type
))
147 case TYPE_CODE_RANGE
:
154 target_type
= builtin_type_int
;
158 if (TYPE_NFIELDS (type
) < 2)
160 /* A range needs at least 2 bounds to be printed. If there are less
161 than 2, just print the type name instead of the range itself.
162 This check handles cases such as characters, for example.
164 If the name is not defined, then we don't print anything.
166 fprintf_filtered (stream
, "%.*s",
167 ada_name_prefix_len (TYPE_NAME (type
)),
172 /* We extract the range type bounds respectively from the first element
173 and the last element of the type->fields array */
174 const LONGEST lower_bound
= (LONGEST
) TYPE_LOW_BOUND (type
);
175 const LONGEST upper_bound
=
176 (LONGEST
) TYPE_FIELD_BITPOS (type
, TYPE_NFIELDS (type
) - 1);
178 ada_print_scalar (target_type
, lower_bound
, stream
);
179 fprintf_filtered (stream
, " .. ");
180 ada_print_scalar (target_type
, upper_bound
, stream
);
184 /* Print the number or discriminant bound at BOUNDS+*N on STREAM, and
185 set *N past the bound and its delimiter, if any. */
188 print_range_bound (struct type
*type
, char *bounds
, int *n
,
189 struct ui_file
*stream
)
192 if (ada_scan_number (bounds
, *n
, &B
, n
))
194 /* STABS decodes all range types which bounds are 0 .. -1 as
195 unsigned integers (ie. the type code is TYPE_CODE_INT, not
196 TYPE_CODE_RANGE). Unfortunately, ada_print_scalar() relies
197 on the unsigned flag to determine whether the bound should
198 be printed as a signed or an unsigned value. This causes
199 the upper bound of the 0 .. -1 range types to be printed as
200 a very large unsigned number instead of -1.
201 To workaround this stabs deficiency, we replace the TYPE by
202 builtin_type_long when we detect that the bound is negative,
203 and the type is a TYPE_CODE_INT. The bound is negative when
204 'm' is the last character of the number scanned in BOUNDS. */
205 if (bounds
[*n
- 1] == 'm' && TYPE_CODE (type
) == TYPE_CODE_INT
)
206 type
= builtin_type_long
;
207 ada_print_scalar (type
, B
, stream
);
208 if (bounds
[*n
] == '_')
214 char *bound
= bounds
+ *n
;
217 pend
= strstr (bound
, "__");
219 *n
+= bound_len
= strlen (bound
);
222 bound_len
= pend
- bound
;
225 fprintf_filtered (stream
, "%.*s", bound_len
, bound
);
229 /* Assuming NAME[0 .. NAME_LEN-1] is the name of a range type, print
230 the value (if found) of the bound indicated by SUFFIX ("___L" or
231 "___U") according to the ___XD conventions. */
234 print_dynamic_range_bound (struct type
*type
, const char *name
, int name_len
,
235 const char *suffix
, struct ui_file
*stream
)
237 static char *name_buf
= NULL
;
238 static size_t name_buf_len
= 0;
242 GROW_VECT (name_buf
, name_buf_len
, name_len
+ strlen (suffix
) + 1);
243 strncpy (name_buf
, name
, name_len
);
244 strcpy (name_buf
+ name_len
, suffix
);
246 B
= get_int_var_value (name_buf
, &OK
);
248 ada_print_scalar (type
, B
, stream
);
250 fprintf_filtered (stream
, "?");
253 /* Print the range type named NAME. */
256 print_range_type_named (char *name
, struct ui_file
*stream
)
258 struct type
*raw_type
= ada_find_any_type (name
);
259 struct type
*base_type
;
262 if (raw_type
== NULL
)
263 base_type
= builtin_type_int
;
264 else if (TYPE_CODE (raw_type
) == TYPE_CODE_RANGE
)
265 base_type
= TYPE_TARGET_TYPE (raw_type
);
267 base_type
= raw_type
;
269 subtype_info
= strstr (name
, "___XD");
270 if (subtype_info
== NULL
&& raw_type
== NULL
)
271 fprintf_filtered (stream
, "? .. ?");
272 else if (subtype_info
== NULL
)
273 print_range (raw_type
, stream
);
276 int prefix_len
= subtype_info
- name
;
281 bounds_str
= strchr (subtype_info
, '_');
284 if (*subtype_info
== 'L')
286 print_range_bound (base_type
, bounds_str
, &n
, stream
);
290 print_dynamic_range_bound (base_type
, name
, prefix_len
, "___L",
293 fprintf_filtered (stream
, " .. ");
295 if (*subtype_info
== 'U')
296 print_range_bound (base_type
, bounds_str
, &n
, stream
);
298 print_dynamic_range_bound (base_type
, name
, prefix_len
, "___U",
303 /* Print enumerated type TYPE on STREAM. */
306 print_enum_type (struct type
*type
, struct ui_file
*stream
)
308 int len
= TYPE_NFIELDS (type
);
311 fprintf_filtered (stream
, "(");
315 for (i
= 0; i
< len
; i
++)
319 fprintf_filtered (stream
, ", ");
321 fputs_filtered (ada_enum_name (TYPE_FIELD_NAME (type
, i
)), stream
);
322 if (lastval
!= TYPE_FIELD_BITPOS (type
, i
))
324 fprintf_filtered (stream
, " => %d", TYPE_FIELD_BITPOS (type
, i
));
325 lastval
= TYPE_FIELD_BITPOS (type
, i
);
329 fprintf_filtered (stream
, ")");
332 /* Print representation of Ada fixed-point type TYPE on STREAM. */
335 print_fixed_point_type (struct type
*type
, struct ui_file
*stream
)
337 DOUBLEST delta
= ada_delta (type
);
338 DOUBLEST small
= ada_fixed_to_float (type
, 1.0);
341 fprintf_filtered (stream
, "delta ??");
344 fprintf_filtered (stream
, "delta %g", (double) delta
);
346 fprintf_filtered (stream
, " <'small = %g>", (double) small
);
350 /* Print representation of special VAX floating-point type TYPE on STREAM. */
353 print_vax_floating_point_type (struct type
*type
, struct ui_file
*stream
)
355 fprintf_filtered (stream
, "<float format %c>",
356 ada_vax_float_type_suffix (type
));
359 /* Print simple (constrained) array type TYPE on STREAM. LEVEL is the
360 recursion (indentation) level, in case the element type itself has
361 nested structure, and SHOW is the number of levels of internal
362 structure to show (see ada_print_type). */
365 print_array_type (struct type
*type
, struct ui_file
*stream
, int show
,
372 fprintf_filtered (stream
, "array (");
376 fprintf_filtered (stream
, "...");
379 if (ada_is_packed_array_type (type
))
380 type
= ada_coerce_to_simple_array_type (type
);
383 fprintf_filtered (stream
, _("<undecipherable array type>"));
386 if (ada_is_simple_array_type (type
))
388 struct type
*range_desc_type
=
389 ada_find_parallel_type (type
, "___XA");
390 struct type
*arr_type
;
393 if (range_desc_type
== NULL
)
395 for (arr_type
= type
; TYPE_CODE (arr_type
) == TYPE_CODE_ARRAY
;
396 arr_type
= TYPE_TARGET_TYPE (arr_type
))
398 if (arr_type
!= type
)
399 fprintf_filtered (stream
, ", ");
400 print_range (TYPE_INDEX_TYPE (arr_type
), stream
);
401 if (TYPE_FIELD_BITSIZE (arr_type
, 0) > 0)
402 bitsize
= TYPE_FIELD_BITSIZE (arr_type
, 0);
408 n_indices
= TYPE_NFIELDS (range_desc_type
);
409 for (k
= 0, arr_type
= type
;
411 k
+= 1, arr_type
= TYPE_TARGET_TYPE (arr_type
))
414 fprintf_filtered (stream
, ", ");
415 print_range_type_named (TYPE_FIELD_NAME
416 (range_desc_type
, k
), stream
);
417 if (TYPE_FIELD_BITSIZE (arr_type
, 0) > 0)
418 bitsize
= TYPE_FIELD_BITSIZE (arr_type
, 0);
425 for (i
= i0
= ada_array_arity (type
); i
> 0; i
-= 1)
426 fprintf_filtered (stream
, "%s<>", i
== i0
? "" : ", ");
430 fprintf_filtered (stream
, ") of ");
432 ada_print_type (ada_array_element_type (type
, n_indices
), "", stream
,
433 show
== 0 ? 0 : show
- 1, level
+ 1);
435 fprintf_filtered (stream
, " <packed: %d-bit elements>", bitsize
);
438 /* Print the choices encoded by field FIELD_NUM of variant-part TYPE on
439 STREAM, assuming the VAL_TYPE is the type of the values. */
442 print_choices (struct type
*type
, int field_num
, struct ui_file
*stream
,
443 struct type
*val_type
)
447 const char *name
= TYPE_FIELD_NAME (type
, field_num
);
451 /* Skip over leading 'V': NOTE soon to be obsolete. */
454 if (!ada_scan_number (name
, 1, NULL
, &p
))
470 fprintf_filtered (stream
, " | ");
480 if (!ada_scan_number (name
, p
+ 1, &W
, &p
))
482 ada_print_scalar (val_type
, W
, stream
);
488 if (!ada_scan_number (name
, p
+ 1, &L
, &p
)
489 || name
[p
] != 'T' || !ada_scan_number (name
, p
+ 1, &U
, &p
))
491 ada_print_scalar (val_type
, L
, stream
);
492 fprintf_filtered (stream
, " .. ");
493 ada_print_scalar (val_type
, U
, stream
);
497 fprintf_filtered (stream
, "others");
504 fprintf_filtered (stream
, "??");
508 /* Assuming that field FIELD_NUM of TYPE is a VARIANTS field whose
509 discriminant is contained in OUTER_TYPE, print its variants on STREAM.
510 LEVEL is the recursion
511 (indentation) level, in case any of the fields themselves have
512 nested structure, and SHOW is the number of levels of internal structure
513 to show (see ada_print_type). For this purpose, fields nested in a
514 variant part are taken to be at the same level as the fields
515 immediately outside the variant part. */
518 print_variant_clauses (struct type
*type
, int field_num
,
519 struct type
*outer_type
, struct ui_file
*stream
,
523 struct type
*var_type
, *par_type
;
524 struct type
*discr_type
;
526 var_type
= TYPE_FIELD_TYPE (type
, field_num
);
527 discr_type
= ada_variant_discrim_type (var_type
, outer_type
);
529 if (TYPE_CODE (var_type
) == TYPE_CODE_PTR
)
531 var_type
= TYPE_TARGET_TYPE (var_type
);
532 if (var_type
== NULL
|| TYPE_CODE (var_type
) != TYPE_CODE_UNION
)
536 par_type
= ada_find_parallel_type (var_type
, "___XVU");
537 if (par_type
!= NULL
)
540 for (i
= 0; i
< TYPE_NFIELDS (var_type
); i
+= 1)
542 fprintf_filtered (stream
, "\n%*swhen ", level
+ 4, "");
543 print_choices (var_type
, i
, stream
, discr_type
);
544 fprintf_filtered (stream
, " =>");
545 if (print_record_field_types (TYPE_FIELD_TYPE (var_type
, i
),
546 outer_type
, stream
, show
, level
+ 4) <= 0)
547 fprintf_filtered (stream
, " null;");
551 /* Assuming that field FIELD_NUM of TYPE is a variant part whose
552 discriminants are contained in OUTER_TYPE, print a description of it
553 on STREAM. LEVEL is the recursion (indentation) level, in case any of
554 the fields themselves have nested structure, and SHOW is the number of
555 levels of internal structure to show (see ada_print_type). For this
556 purpose, fields nested in a variant part are taken to be at the same
557 level as the fields immediately outside the variant part. */
560 print_variant_part (struct type
*type
, int field_num
, struct type
*outer_type
,
561 struct ui_file
*stream
, int show
, int level
)
563 fprintf_filtered (stream
, "\n%*scase %s is", level
+ 4, "",
564 ada_variant_discrim_name
565 (TYPE_FIELD_TYPE (type
, field_num
)));
566 print_variant_clauses (type
, field_num
, outer_type
, stream
, show
,
568 fprintf_filtered (stream
, "\n%*send case;", level
+ 4, "");
571 /* Print a description on STREAM of the fields in record type TYPE, whose
572 discriminants are in OUTER_TYPE. LEVEL is the recursion (indentation)
573 level, in case any of the fields themselves have nested structure,
574 and SHOW is the number of levels of internal structure to show
575 (see ada_print_type). Does not print parent type information of TYPE.
576 Returns 0 if no fields printed, -1 for an incomplete type, else > 0.
577 Prints each field beginning on a new line, but does not put a new line at
581 print_record_field_types (struct type
*type
, struct type
*outer_type
,
582 struct ui_file
*stream
, int show
, int level
)
587 len
= TYPE_NFIELDS (type
);
589 if (len
== 0 && (TYPE_FLAGS (type
) & TYPE_FLAG_STUB
) != 0)
592 for (i
= 0; i
< len
; i
+= 1)
596 if (ada_is_parent_field (type
, i
) || ada_is_ignored_field (type
, i
))
598 else if (ada_is_wrapper_field (type
, i
))
599 flds
+= print_record_field_types (TYPE_FIELD_TYPE (type
, i
), type
,
600 stream
, show
, level
);
601 else if (ada_is_variant_part (type
, i
))
603 print_variant_part (type
, i
, outer_type
, stream
, show
, level
);
609 fprintf_filtered (stream
, "\n%*s", level
+ 4, "");
610 ada_print_type (TYPE_FIELD_TYPE (type
, i
),
611 TYPE_FIELD_NAME (type
, i
),
612 stream
, show
- 1, level
+ 4);
613 fprintf_filtered (stream
, ";");
620 /* Print record type TYPE on STREAM. LEVEL is the recursion (indentation)
621 level, in case the element type itself has nested structure, and SHOW is
622 the number of levels of internal structure to show (see ada_print_type). */
625 print_record_type (struct type
*type0
, struct ui_file
*stream
, int show
,
628 struct type
*parent_type
;
631 type
= ada_find_parallel_type (type0
, "___XVE");
635 parent_type
= ada_parent_type (type
);
636 if (ada_type_name (parent_type
) != NULL
)
637 fprintf_filtered (stream
, "new %s with record",
638 decoded_type_name (parent_type
));
639 else if (parent_type
== NULL
&& ada_is_tagged_type (type
, 0))
640 fprintf_filtered (stream
, "tagged record");
642 fprintf_filtered (stream
, "record");
645 fprintf_filtered (stream
, " ... end record");
651 if (parent_type
!= NULL
&& ada_type_name (parent_type
) == NULL
)
652 flds
+= print_record_field_types (parent_type
, parent_type
,
653 stream
, show
, level
);
654 flds
+= print_record_field_types (type
, type
, stream
, show
, level
);
657 fprintf_filtered (stream
, "\n%*send record", level
, "");
659 fprintf_filtered (stream
, _(" <incomplete type> end record"));
661 fprintf_filtered (stream
, " null; end record");
665 /* Print the unchecked union type TYPE in something resembling Ada
666 format on STREAM. LEVEL is the recursion (indentation) level
667 in case the element type itself has nested structure, and SHOW is the
668 number of levels of internal structure to show (see ada_print_type). */
670 print_unchecked_union_type (struct type
*type
, struct ui_file
*stream
,
674 fprintf_filtered (stream
, "record (?) is ... end record");
675 else if (TYPE_NFIELDS (type
) == 0)
676 fprintf_filtered (stream
, "record (?) is null; end record");
681 fprintf_filtered (stream
, "record (?) is\n%*scase ? is", level
+ 4, "");
683 for (i
= 0; i
< TYPE_NFIELDS (type
); i
+= 1)
685 fprintf_filtered (stream
, "\n%*swhen ? =>\n%*s", level
+ 8, "",
687 ada_print_type (TYPE_FIELD_TYPE (type
, i
),
688 TYPE_FIELD_NAME (type
, i
),
689 stream
, show
- 1, level
+ 12);
690 fprintf_filtered (stream
, ";");
693 fprintf_filtered (stream
, "\n%*send case;\n%*send record",
694 level
+ 4, "", level
, "");
700 /* Print function or procedure type TYPE on STREAM. Make it a header
701 for function or procedure NAME if NAME is not null. */
704 print_func_type (struct type
*type
, struct ui_file
*stream
, char *name
)
706 int i
, len
= TYPE_NFIELDS (type
);
708 if (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_VOID
)
709 fprintf_filtered (stream
, "procedure");
711 fprintf_filtered (stream
, "function");
713 if (name
!= NULL
&& name
[0] != '\0')
714 fprintf_filtered (stream
, " %s", name
);
718 fprintf_filtered (stream
, " (");
719 for (i
= 0; i
< len
; i
+= 1)
723 fputs_filtered ("; ", stream
);
726 fprintf_filtered (stream
, "a%d: ", i
+ 1);
727 ada_print_type (TYPE_FIELD_TYPE (type
, i
), "", stream
, -1, 0);
729 fprintf_filtered (stream
, ")");
732 if (TYPE_CODE (TYPE_TARGET_TYPE (type
)) != TYPE_CODE_VOID
)
734 fprintf_filtered (stream
, " return ");
735 ada_print_type (TYPE_TARGET_TYPE (type
), "", stream
, 0, 0);
740 /* Print a description of a type TYPE0.
741 Output goes to STREAM (via stdio).
742 If VARSTRING is a non-empty string, print as an Ada variable/field
744 SHOW+1 is the maximum number of levels of internal type structure
745 to show (this applies to record types, enumerated types, and
747 SHOW is the number of levels of internal type structure to show
748 when there is a type name for the SHOWth deepest level (0th is
750 When SHOW<0, no inner structure is shown.
751 LEVEL indicates level of recursion (for nested definitions). */
754 ada_print_type (struct type
*type0
, char *varstring
, struct ui_file
*stream
,
757 struct type
*type
= ada_check_typedef (ada_get_base_type (type0
));
758 char *type_name
= decoded_type_name (type
);
759 int is_var_decl
= (varstring
!= NULL
&& varstring
[0] != '\0');
764 fprintf_filtered (stream
, "%.*s: ",
765 ada_name_prefix_len (varstring
), varstring
);
766 fprintf_filtered (stream
, "<null type?>");
771 type
= ada_check_typedef (type
);
773 if (is_var_decl
&& TYPE_CODE (type
) != TYPE_CODE_FUNC
)
774 fprintf_filtered (stream
, "%.*s: ",
775 ada_name_prefix_len (varstring
), varstring
);
777 if (type_name
!= NULL
&& show
<= 0)
779 fprintf_filtered (stream
, "%.*s",
780 ada_name_prefix_len (type_name
), type_name
);
784 if (ada_is_aligner_type (type
))
785 ada_print_type (ada_aligned_type (type
), "", stream
, show
, level
);
786 else if (ada_is_packed_array_type (type
))
787 print_array_type (type
, stream
, show
, level
);
789 switch (TYPE_CODE (type
))
792 fprintf_filtered (stream
, "<");
793 c_print_type (type
, "", stream
, show
, level
);
794 fprintf_filtered (stream
, ">");
797 fprintf_filtered (stream
, "access ");
798 ada_print_type (TYPE_TARGET_TYPE (type
), "", stream
, show
, level
);
801 fprintf_filtered (stream
, "<ref> ");
802 ada_print_type (TYPE_TARGET_TYPE (type
), "", stream
, show
, level
);
804 case TYPE_CODE_ARRAY
:
805 print_array_type (type
, stream
, show
, level
);
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
, 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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