aboutsummaryrefslogtreecommitdiff
path: root/gdb/ada-valprint.c
blob: 8af9ef0012f9b13513cc1e4ced81e8f4ffa98ea1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
/* Support for printing Ada values for GDB, the GNU debugger.

   Copyright (C) 1986-2021 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include <ctype.h>
#include "gdbtypes.h"
#include "expression.h"
#include "value.h"
#include "valprint.h"
#include "language.h"
#include "annotate.h"
#include "ada-lang.h"
#include "target-float.h"
#include "cli/cli-style.h"
#include "gdbarch.h"

static int print_field_values (struct value *, struct value *,
			       struct ui_file *, int,
			       const struct value_print_options *,
			       int, const struct language_defn *);



/* Make TYPE unsigned if its range of values includes no negatives.  */
static void
adjust_type_signedness (struct type *type)
{
  if (type != NULL && type->code () == TYPE_CODE_RANGE
      && type->bounds ()->low.const_val () >= 0)
    type->set_is_unsigned (true);
}

/* Assuming TYPE is a simple array type, prints its lower bound on STREAM,
   if non-standard (i.e., other than 1 for numbers, other than lower bound
   of index type for enumerated type).  Returns 1 if something printed,
   otherwise 0.  */

static int
print_optional_low_bound (struct ui_file *stream, struct type *type,
			  const struct value_print_options *options)
{
  struct type *index_type;
  LONGEST low_bound;
  LONGEST high_bound;

  if (options->print_array_indexes)
    return 0;

  if (!get_array_bounds (type, &low_bound, &high_bound))
    return 0;

  /* If this is an empty array, then don't print the lower bound.
     That would be confusing, because we would print the lower bound,
     followed by... nothing!  */
  if (low_bound > high_bound)
    return 0;

  index_type = type->index_type ();

  while (index_type->code () == TYPE_CODE_RANGE)
    {
      /* We need to know what the base type is, in order to do the
	 appropriate check below.  Otherwise, if this is a subrange
	 of an enumerated type, where the underlying value of the
	 first element is typically 0, we might test the low bound
	 against the wrong value.  */
      index_type = TYPE_TARGET_TYPE (index_type);
    }

  /* Don't print the lower bound if it's the default one.  */
  switch (index_type->code ())
    {
    case TYPE_CODE_BOOL:
    case TYPE_CODE_CHAR:
      if (low_bound == 0)
	return 0;
      break;
    case TYPE_CODE_ENUM:
      if (low_bound == 0)
	return 0;
      low_bound = TYPE_FIELD_ENUMVAL (index_type, low_bound);
      break;
    case TYPE_CODE_UNDEF:
      index_type = NULL;
      /* FALL THROUGH */
    default:
      if (low_bound == 1)
	return 0;
      break;
    }

  ada_print_scalar (index_type, low_bound, stream);
  fprintf_filtered (stream, " => ");
  return 1;
}

/*  Version of val_print_array_elements for GNAT-style packed arrays.
    Prints elements of packed array of type TYPE from VALADDR on
    STREAM.  Formats according to OPTIONS and separates with commas.
    RECURSE is the recursion (nesting) level.  TYPE must have been
    decoded (as by ada_coerce_to_simple_array).  */

static void
val_print_packed_array_elements (struct type *type, const gdb_byte *valaddr,
				 int offset, struct ui_file *stream,
				 int recurse,
				 const struct value_print_options *options)
{
  unsigned int i;
  unsigned int things_printed = 0;
  unsigned len;
  struct type *elttype, *index_type;
  unsigned long bitsize = TYPE_FIELD_BITSIZE (type, 0);
  struct value *mark = value_mark ();
  LONGEST low = 0;

  elttype = TYPE_TARGET_TYPE (type);
  index_type = type->index_type ();

  {
    LONGEST high;

    if (!get_discrete_bounds (index_type, &low, &high))
      len = 1;
    else if (low > high)
      {
	/* The array length should normally be HIGH_POS - LOW_POS + 1.
	   But in Ada we allow LOW_POS to be greater than HIGH_POS for
	   empty arrays.  In that situation, the array length is just zero,
	   not negative!  */
	len = 0;
      }
    else
      len = high - low + 1;
  }

  if (index_type->code () == TYPE_CODE_RANGE)
    index_type = TYPE_TARGET_TYPE (index_type);

  i = 0;
  annotate_array_section_begin (i, elttype);

  while (i < len && things_printed < options->print_max)
    {
      struct value *v0, *v1;
      int i0;

      if (i != 0)
	{
	  if (options->prettyformat_arrays)
	    {
	      fprintf_filtered (stream, ",\n");
	      print_spaces_filtered (2 + 2 * recurse, stream);
	    }
	  else
	    {
	      fprintf_filtered (stream, ", ");
	    }
	}
      else if (options->prettyformat_arrays)
	{
	  fprintf_filtered (stream, "\n");
	  print_spaces_filtered (2 + 2 * recurse, stream);
	}
      wrap_here (n_spaces (2 + 2 * recurse));
      maybe_print_array_index (index_type, i + low, stream, options);

      i0 = i;
      v0 = ada_value_primitive_packed_val (NULL, valaddr + offset,
					   (i0 * bitsize) / HOST_CHAR_BIT,
					   (i0 * bitsize) % HOST_CHAR_BIT,
					   bitsize, elttype);
      while (1)
	{
	  i += 1;
	  if (i >= len)
	    break;
	  v1 = ada_value_primitive_packed_val (NULL, valaddr + offset,
					       (i * bitsize) / HOST_CHAR_BIT,
					       (i * bitsize) % HOST_CHAR_BIT,
					       bitsize, elttype);
	  if (TYPE_LENGTH (check_typedef (value_type (v0)))
	      != TYPE_LENGTH (check_typedef (value_type (v1))))
	    break;
	  if (!value_contents_eq (v0, value_embedded_offset (v0),
				  v1, value_embedded_offset (v1),
				  TYPE_LENGTH (check_typedef (value_type (v0)))))
	    break;
	}

      if (i - i0 > options->repeat_count_threshold)
	{
	  struct value_print_options opts = *options;

	  opts.deref_ref = 0;
	  common_val_print (v0, stream, recurse + 1, &opts, current_language);
	  annotate_elt_rep (i - i0);
	  fprintf_filtered (stream, _(" %p[<repeats %u times>%p]"),
			    metadata_style.style ().ptr (), i - i0, nullptr);
	  annotate_elt_rep_end ();

	}
      else
	{
	  int j;
	  struct value_print_options opts = *options;

	  opts.deref_ref = 0;
	  for (j = i0; j < i; j += 1)
	    {
	      if (j > i0)
		{
		  if (options->prettyformat_arrays)
		    {
		      fprintf_filtered (stream, ",\n");
		      print_spaces_filtered (2 + 2 * recurse, stream);
		    }
		  else
		    {
		      fprintf_filtered (stream, ", ");
		    }
		  wrap_here (n_spaces (2 + 2 * recurse));
		  maybe_print_array_index (index_type, j + low,
					   stream, options);
		}
	      common_val_print (v0, stream, recurse + 1, &opts,
				current_language);
	      annotate_elt ();
	    }
	}
      things_printed += i - i0;
    }
  annotate_array_section_end ();
  if (i < len)
    {
      fprintf_filtered (stream, "...");
    }

  value_free_to_mark (mark);
}

/* Print the character C on STREAM as part of the contents of a literal
   string whose delimiter is QUOTER.  TYPE_LEN is the length in bytes
   of the character.  */

void
ada_emit_char (int c, struct type *type, struct ui_file *stream,
	       int quoter, int type_len)
{
  /* If this character fits in the normal ASCII range, and is
     a printable character, then print the character as if it was
     an ASCII character, even if this is a wide character.
     The UCHAR_MAX check is necessary because the isascii function
     requires that its argument have a value of an unsigned char,
     or EOF (EOF is obviously not printable).  */
  if (c <= UCHAR_MAX && isascii (c) && isprint (c))
    {
      if (c == quoter && c == '"')
	fprintf_filtered (stream, "\"\"");
      else
	fprintf_filtered (stream, "%c", c);
    }
  else
    fprintf_filtered (stream, "[\"%0*x\"]", type_len * 2, c);
}

/* Character #I of STRING, given that TYPE_LEN is the size in bytes
   of a character.  */

static int
char_at (const gdb_byte *string, int i, int type_len,
	 enum bfd_endian byte_order)
{
  if (type_len == 1)
    return string[i];
  else
    return (int) extract_unsigned_integer (string + type_len * i,
					   type_len, byte_order);
}

/* Print a floating-point value of type TYPE, pointed to in GDB by
   VALADDR, on STREAM.  Use Ada formatting conventions: there must be
   a decimal point, and at least one digit before and after the
   point.  We use the GNAT format for NaNs and infinities.  */

static void
ada_print_floating (const gdb_byte *valaddr, struct type *type,
		    struct ui_file *stream)
{
  string_file tmp_stream;

  print_floating (valaddr, type, &tmp_stream);

  std::string &s = tmp_stream.string ();
  size_t skip_count = 0;

  /* Modify for Ada rules.  */

  size_t pos = s.find ("inf");
  if (pos == std::string::npos)
    pos = s.find ("Inf");
  if (pos == std::string::npos)
    pos = s.find ("INF");
  if (pos != std::string::npos)
    s.replace (pos, 3, "Inf");

  if (pos == std::string::npos)
    {
      pos = s.find ("nan");
      if (pos == std::string::npos)
	pos = s.find ("NaN");
      if (pos == std::string::npos)
	pos = s.find ("Nan");
      if (pos != std::string::npos)
	{
	  s[pos] = s[pos + 2] = 'N';
	  if (s[0] == '-')
	    skip_count = 1;
	}
    }

  if (pos == std::string::npos
      && s.find ('.') == std::string::npos)
    {
      pos = s.find ('e');
      if (pos == std::string::npos)
	fprintf_filtered (stream, "%s.0", s.c_str ());
      else
	fprintf_filtered (stream, "%.*s.0%s", (int) pos, s.c_str (), &s[pos]);
    }
  else
    fprintf_filtered (stream, "%s", &s[skip_count]);
}

void
ada_printchar (int c, struct type *type, struct ui_file *stream)
{
  fputs_filtered ("'", stream);
  ada_emit_char (c, type, stream, '\'', TYPE_LENGTH (type));
  fputs_filtered ("'", stream);
}

/* [From print_type_scalar in typeprint.c].   Print VAL on STREAM in a
   form appropriate for TYPE, if non-NULL.  If TYPE is NULL, print VAL
   like a default signed integer.  */

void
ada_print_scalar (struct type *type, LONGEST val, struct ui_file *stream)
{
  unsigned int i;
  unsigned len;

  if (!type)
    {
      print_longest (stream, 'd', 0, val);
      return;
    }

  type = ada_check_typedef (type);

  switch (type->code ())
    {

    case TYPE_CODE_ENUM:
      len = type->num_fields ();
      for (i = 0; i < len; i++)
	{
	  if (TYPE_FIELD_ENUMVAL (type, i) == val)
	    {
	      break;
	    }
	}
      if (i < len)
	{
	  fputs_styled (ada_enum_name (TYPE_FIELD_NAME (type, i)),
			variable_name_style.style (), stream);
	}
      else
	{
	  print_longest (stream, 'd', 0, val);
	}
      break;

    case TYPE_CODE_INT:
      print_longest (stream, type->is_unsigned () ? 'u' : 'd', 0, val);
      break;

    case TYPE_CODE_CHAR:
      LA_PRINT_CHAR (val, type, stream);
      break;

    case TYPE_CODE_BOOL:
      fprintf_filtered (stream, val ? "true" : "false");
      break;

    case TYPE_CODE_RANGE:
      ada_print_scalar (TYPE_TARGET_TYPE (type), val, stream);
      return;

    case TYPE_CODE_UNDEF:
    case TYPE_CODE_PTR:
    case TYPE_CODE_ARRAY:
    case TYPE_CODE_STRUCT:
    case TYPE_CODE_UNION:
    case TYPE_CODE_FUNC:
    case TYPE_CODE_FLT:
    case TYPE_CODE_VOID:
    case TYPE_CODE_SET:
    case TYPE_CODE_STRING:
    case TYPE_CODE_ERROR:
    case TYPE_CODE_MEMBERPTR:
    case TYPE_CODE_METHODPTR:
    case TYPE_CODE_METHOD:
    case TYPE_CODE_REF:
      warning (_("internal error: unhandled type in ada_print_scalar"));
      break;

    default:
      error (_("Invalid type code in symbol table."));
    }
}

/* Print the character string STRING, printing at most LENGTH characters.
   Printing stops early if the number hits print_max; repeat counts
   are printed as appropriate.  Print ellipses at the end if we
   had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
   TYPE_LEN is the length (1 or 2) of the character type.  */

static void
printstr (struct ui_file *stream, struct type *elttype, const gdb_byte *string,
	  unsigned int length, int force_ellipses, int type_len,
	  const struct value_print_options *options)
{
  enum bfd_endian byte_order = type_byte_order (elttype);
  unsigned int i;
  unsigned int things_printed = 0;
  int in_quotes = 0;
  int need_comma = 0;

  if (length == 0)
    {
      fputs_filtered ("\"\"", stream);
      return;
    }

  for (i = 0; i < length && things_printed < options->print_max; i += 1)
    {
      /* Position of the character we are examining
	 to see whether it is repeated.  */
      unsigned int rep1;
      /* Number of repetitions we have detected so far.  */
      unsigned int reps;

      QUIT;

      if (need_comma)
	{
	  fputs_filtered (", ", stream);
	  need_comma = 0;
	}

      rep1 = i + 1;
      reps = 1;
      while (rep1 < length
	     && char_at (string, rep1, type_len, byte_order)
		== char_at (string, i, type_len, byte_order))
	{
	  rep1 += 1;
	  reps += 1;
	}

      if (reps > options->repeat_count_threshold)
	{
	  if (in_quotes)
	    {
	      fputs_filtered ("\", ", stream);
	      in_quotes = 0;
	    }
	  fputs_filtered ("'", stream);
	  ada_emit_char (char_at (string, i, type_len, byte_order),
			 elttype, stream, '\'', type_len);
	  fputs_filtered ("'", stream);
	  fprintf_filtered (stream, _(" %p[<repeats %u times>%p]"),
			    metadata_style.style ().ptr (), reps, nullptr);
	  i = rep1 - 1;
	  things_printed += options->repeat_count_threshold;
	  need_comma = 1;
	}
      else
	{
	  if (!in_quotes)
	    {
	      fputs_filtered ("\"", stream);
	      in_quotes = 1;
	    }
	  ada_emit_char (char_at (string, i, type_len, byte_order),
			 elttype, stream, '"', type_len);
	  things_printed += 1;
	}
    }

  /* Terminate the quotes if necessary.  */
  if (in_quotes)
    fputs_filtered ("\"", stream);

  if (force_ellipses || i < length)
    fputs_filtered ("...", stream);
}

void
ada_printstr (struct ui_file *stream, struct type *type,
	      const gdb_byte *string, unsigned int length,
	      const char *encoding, int force_ellipses,
	      const struct value_print_options *options)
{
  printstr (stream, type, string, length, force_ellipses, TYPE_LENGTH (type),
	    options);
}

static int
print_variant_part (struct value *value, int field_num,
		    struct value *outer_value,
		    struct ui_file *stream, int recurse,
		    const struct value_print_options *options,
		    int comma_needed,
		    const struct language_defn *language)
{
  struct type *type = value_type (value);
  struct type *var_type = type->field (field_num).type ();
  int which = ada_which_variant_applies (var_type, outer_value);

  if (which < 0)
    return 0;

  struct value *variant_field = value_field (value, field_num);
  struct value *active_component = value_field (variant_field, which);
  return print_field_values (active_component, outer_value, stream, recurse,
			     options, comma_needed, language);
}

/* Print out fields of VALUE.

   STREAM, RECURSE, and OPTIONS have the same meanings as in
   ada_print_value and ada_value_print.

   OUTER_VALUE gives the enclosing record (used to get discriminant
   values when printing variant parts).

   COMMA_NEEDED is 1 if fields have been printed at the current recursion
   level, so that a comma is needed before any field printed by this
   call.

   Returns 1 if COMMA_NEEDED or any fields were printed.  */

static int
print_field_values (struct value *value, struct value *outer_value,
		    struct ui_file *stream, int recurse,
		    const struct value_print_options *options,
		    int comma_needed,
		    const struct language_defn *language)
{
  int i, len;

  struct type *type = value_type (value);
  len = type->num_fields ();

  for (i = 0; i < len; i += 1)
    {
      if (ada_is_ignored_field (type, i))
	continue;

      if (ada_is_wrapper_field (type, i))
	{
	  struct value *field_val = ada_value_primitive_field (value, 0,
							       i, type);
	  comma_needed =
	    print_field_values (field_val, field_val,
				stream, recurse, options,
				comma_needed, language);
	  continue;
	}
      else if (ada_is_variant_part (type, i))
	{
	  comma_needed =
	    print_variant_part (value, i, outer_value, stream, recurse,
				options, comma_needed, language);
	  continue;
	}

      if (comma_needed)
	fprintf_filtered (stream, ", ");
      comma_needed = 1;

      if (options->prettyformat)
	{
	  fprintf_filtered (stream, "\n");
	  print_spaces_filtered (2 + 2 * recurse, stream);
	}
      else
	{
	  wrap_here (n_spaces (2 + 2 * recurse));
	}

      annotate_field_begin (type->field (i).type ());
      fprintf_filtered (stream, "%.*s",
			ada_name_prefix_len (TYPE_FIELD_NAME (type, i)),
			TYPE_FIELD_NAME (type, i));
      annotate_field_name_end ();
      fputs_filtered (" => ", stream);
      annotate_field_value ();

      if (TYPE_FIELD_PACKED (type, i))
	{
	  /* Bitfields require special handling, especially due to byte
	     order problems.  */
	  if (HAVE_CPLUS_STRUCT (type) && TYPE_FIELD_IGNORE (type, i))
	    {
	      fputs_styled (_("<optimized out or zero length>"),
			    metadata_style.style (), stream);
	    }
	  else
	    {
	      struct value *v;
	      int bit_pos = TYPE_FIELD_BITPOS (type, i);
	      int bit_size = TYPE_FIELD_BITSIZE (type, i);
	      struct value_print_options opts;

	      adjust_type_signedness (type->field (i).type ());
	      v = ada_value_primitive_packed_val
		    (value, nullptr,
		     bit_pos / HOST_CHAR_BIT,
		     bit_pos % HOST_CHAR_BIT,
		     bit_size, type->field (i).type ());
	      opts = *options;
	      opts.deref_ref = 0;
	      common_val_print (v, stream, recurse + 1, &opts, language);
	    }
	}
      else
	{
	  struct value_print_options opts = *options;

	  opts.deref_ref = 0;

	  struct value *v = value_field (value, i);
	  common_val_print (v, stream, recurse + 1, &opts, language);
	}
      annotate_field_end ();
    }

  return comma_needed;
}

/* Implement Ada val_print'ing for the case where TYPE is
   a TYPE_CODE_ARRAY of characters.  */

static void
ada_val_print_string (struct type *type, const gdb_byte *valaddr,
		      int offset_aligned,
		      struct ui_file *stream, int recurse,
		      const struct value_print_options *options)
{
  enum bfd_endian byte_order = type_byte_order (type);
  struct type *elttype = TYPE_TARGET_TYPE (type);
  unsigned int eltlen;
  unsigned int len;

  /* We know that ELTTYPE cannot possibly be null, because we assume
     that we're called only when TYPE is a string-like type.
     Similarly, the size of ELTTYPE should also be non-null, since
     it's a character-like type.  */
  gdb_assert (elttype != NULL);
  gdb_assert (TYPE_LENGTH (elttype) != 0);

  eltlen = TYPE_LENGTH (elttype);
  len = TYPE_LENGTH (type) / eltlen;

  /* If requested, look for the first null char and only print
     elements up to it.  */
  if (options->stop_print_at_null)
    {
      int temp_len;

      /* Look for a NULL char.  */
      for (temp_len = 0;
	   (temp_len < len
	    && temp_len < options->print_max
	    && char_at (valaddr + offset_aligned,
			temp_len, eltlen, byte_order) != 0);
	   temp_len += 1);
      len = temp_len;
    }

  printstr (stream, elttype, valaddr + offset_aligned, len, 0,
	    eltlen, options);
}

/* Implement Ada value_print'ing for the case where TYPE is a
   TYPE_CODE_PTR.  */

static void
ada_value_print_ptr (struct value *val,
		     struct ui_file *stream, int recurse,
		     const struct value_print_options *options)
{
  common_val_print (val, stream, recurse, options, language_def (language_c));

  struct type *type = ada_check_typedef (value_type (val));
  if (ada_is_tag_type (type))
    {
      gdb::unique_xmalloc_ptr<char> name = ada_tag_name (val);

      if (name != NULL)
	fprintf_filtered (stream, " (%s)", name.get ());
    }
}

/* Implement Ada val_print'ing for the case where TYPE is
   a TYPE_CODE_INT or TYPE_CODE_RANGE.  */

static void
ada_value_print_num (struct value *val, struct ui_file *stream, int recurse,
		     const struct value_print_options *options)
{
  struct type *type = ada_check_typedef (value_type (val));
  const gdb_byte *valaddr = value_contents_for_printing (val);

  if (ada_is_gnat_encoded_fixed_point_type (type))
    {
      struct value *scale = gnat_encoded_fixed_point_scaling_factor (type);
      val = value_cast (value_type (scale), val);
      val = value_binop (val, scale, BINOP_MUL);

      const char *fmt = TYPE_LENGTH (type) < 4 ? "%.11g" : "%.17g";
      std::string str
	= target_float_to_string (value_contents (val), value_type (val), fmt);
      fputs_filtered (str.c_str (), stream);
      return;
    }
  else if (type->code () == TYPE_CODE_RANGE
	   && (TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_ENUM
	       || TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_BOOL
	       || TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_CHAR))
    {
      /* For enum-valued ranges, we want to recurse, because we'll end
	 up printing the constant's name rather than its numeric
	 value.  Character and fixed-point types are also printed
	 differently, so recuse for those as well.  */
      struct type *target_type = TYPE_TARGET_TYPE (type);
      val = value_cast (target_type, val);
      common_val_print (val, stream, recurse + 1, options,
			language_def (language_ada));
      return;
    }
  else
    {
      int format = (options->format ? options->format
		    : options->output_format);

      if (format)
	{
	  struct value_print_options opts = *options;

	  opts.format = format;
	  value_print_scalar_formatted (val, &opts, 0, stream);
	}
      else if (ada_is_system_address_type (type))
	{
	  /* FIXME: We want to print System.Address variables using
	     the same format as for any access type.  But for some
	     reason GNAT encodes the System.Address type as an int,
	     so we have to work-around this deficiency by handling
	     System.Address values as a special case.  */

	  struct gdbarch *gdbarch = type->arch ();
	  struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
	  CORE_ADDR addr = extract_typed_address (valaddr, ptr_type);

	  fprintf_filtered (stream, "(");
	  type_print (type, "", stream, -1);
	  fprintf_filtered (stream, ") ");
	  fputs_filtered (paddress (gdbarch, addr), stream);
	}
      else
	{
	  value_print_scalar_formatted (val, options, 0, stream);
	  if (ada_is_character_type (type))
	    {
	      LONGEST c;

	      fputs_filtered (" ", stream);
	      c = unpack_long (type, valaddr);
	      ada_printchar (c, type, stream);
	    }
	}
      return;
    }
}

/* Implement Ada val_print'ing for the case where TYPE is
   a TYPE_CODE_ENUM.  */

static void
ada_val_print_enum (struct value *value, struct ui_file *stream, int recurse,
		    const struct value_print_options *options)
{
  int i;
  unsigned int len;
  LONGEST val;

  if (options->format)
    {
      value_print_scalar_formatted (value, options, 0, stream);
      return;
    }

  struct type *type = ada_check_typedef (value_type (value));
  const gdb_byte *valaddr = value_contents_for_printing (value);
  int offset_aligned = ada_aligned_value_addr (type, valaddr) - valaddr;

  len = type->num_fields ();
  val = unpack_long (type, valaddr + offset_aligned);
  for (i = 0; i < len; i++)
    {
      QUIT;
      if (val == TYPE_FIELD_ENUMVAL (type, i))
	break;
    }

  if (i < len)
    {
      const char *name = ada_enum_name (TYPE_FIELD_NAME (type, i));

      if (name[0] == '\'')
	fprintf_filtered (stream, "%ld %ps", (long) val,
			  styled_string (variable_name_style.style (),
					 name));
      else
	fputs_styled (name, variable_name_style.style (), stream);
    }
  else
    print_longest (stream, 'd', 0, val);
}

/* Implement Ada val_print'ing for the case where the type is
   TYPE_CODE_STRUCT or TYPE_CODE_UNION.  */

static void
ada_val_print_struct_union (struct value *value,
			    struct ui_file *stream,
			    int recurse,
			    const struct value_print_options *options)
{
  if (ada_is_bogus_array_descriptor (value_type (value)))
    {
      fprintf_filtered (stream, "(...?)");
      return;
    }

  fprintf_filtered (stream, "(");

  if (print_field_values (value, value, stream, recurse, options,
			  0, language_def (language_ada)) != 0
      && options->prettyformat)
    {
      fprintf_filtered (stream, "\n");
      print_spaces_filtered (2 * recurse, stream);
    }

  fprintf_filtered (stream, ")");
}

/* Implement Ada value_print'ing for the case where TYPE is a
   TYPE_CODE_ARRAY.  */

static void
ada_value_print_array (struct value *val, struct ui_file *stream, int recurse,
		       const struct value_print_options *options)
{
  struct type *type = ada_check_typedef (value_type (val));

  /* For an array of characters, print with string syntax.  */
  if (ada_is_string_type (type)
      && (options->format == 0 || options->format == 's'))
    {
      const gdb_byte *valaddr = value_contents_for_printing (val);
      int offset_aligned = ada_aligned_value_addr (type, valaddr) - valaddr;

      ada_val_print_string (type, valaddr, offset_aligned, stream, recurse,
			    options);
      return;
    }

  fprintf_filtered (stream, "(");
  print_optional_low_bound (stream, type, options);
  if (TYPE_FIELD_BITSIZE (type, 0) > 0)
    {
      const gdb_byte *valaddr = value_contents_for_printing (val);
      int offset_aligned = ada_aligned_value_addr (type, valaddr) - valaddr;
      val_print_packed_array_elements (type, valaddr, offset_aligned,
				       stream, recurse, options);
    }
  else
    value_print_array_elements (val, stream, recurse, options, 0);
  fprintf_filtered (stream, ")");
}

/* Implement Ada val_print'ing for the case where TYPE is
   a TYPE_CODE_REF.  */

static void
ada_val_print_ref (struct type *type, const gdb_byte *valaddr,
		   int offset, int offset_aligned, CORE_ADDR address,
		   struct ui_file *stream, int recurse,
		   struct value *original_value,
		   const struct value_print_options *options)
{
  /* For references, the debugger is expected to print the value as
     an address if DEREF_REF is null.  But printing an address in place
     of the object value would be confusing to an Ada programmer.
     So, for Ada values, we print the actual dereferenced value
     regardless.  */
  struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
  struct value *deref_val;
  CORE_ADDR deref_val_int;

  if (elttype->code () == TYPE_CODE_UNDEF)
    {
      fputs_styled ("<ref to undefined type>", metadata_style.style (),
		    stream);
      return;
    }

  deref_val = coerce_ref_if_computed (original_value);
  if (deref_val)
    {
      if (ada_is_tagged_type (value_type (deref_val), 1))
	deref_val = ada_tag_value_at_base_address (deref_val);

      common_val_print (deref_val, stream, recurse + 1, options,
			language_def (language_ada));
      return;
    }

  deref_val_int = unpack_pointer (type, valaddr + offset_aligned);
  if (deref_val_int == 0)
    {
      fputs_filtered ("(null)", stream);
      return;
    }

  deref_val
    = ada_value_ind (value_from_pointer (lookup_pointer_type (elttype),
					 deref_val_int));
  if (ada_is_tagged_type (value_type (deref_val), 1))
    deref_val = ada_tag_value_at_base_address (deref_val);

  /* Make sure that the object does not have an unreasonable size
     before trying to print it.  This can happen for instance with
     references to dynamic objects whose contents is uninitialized
     (Eg: an array whose bounds are not set yet).  */
  ada_ensure_varsize_limit (value_type (deref_val));

  if (value_lazy (deref_val))
    value_fetch_lazy (deref_val);

  common_val_print (deref_val, stream, recurse + 1,
		    options, language_def (language_ada));
}

/* See the comment on ada_value_print.  This function differs in that
   it does not catch evaluation errors (leaving that to
   ada_value_print).  */

static void
ada_value_print_1 (struct value *val, struct ui_file *stream, int recurse,
		   const struct value_print_options *options)
{
  struct type *type = ada_check_typedef (value_type (val));

  if (ada_is_array_descriptor_type (type)
      || (ada_is_constrained_packed_array_type (type)
	  && type->code () != TYPE_CODE_PTR))
    {
      /* If this is a reference, coerce it now.  This helps taking
	 care of the case where ADDRESS is meaningless because
	 original_value was not an lval.  */
      val = coerce_ref (val);
      val = ada_get_decoded_value (val);
      if (val == nullptr)
	{
	  gdb_assert (type->code () == TYPE_CODE_TYPEDEF);
	  fprintf_filtered (stream, "0x0");
	  return;
	}
    }
  else
    val = ada_to_fixed_value (val);

  type = value_type (val);
  struct type *saved_type = type;

  const gdb_byte *valaddr = value_contents_for_printing (val);
  CORE_ADDR address = value_address (val);
  gdb::array_view<const gdb_byte> view
    = gdb::make_array_view (valaddr, TYPE_LENGTH (type));
  type = ada_check_typedef (resolve_dynamic_type (type, view, address));
  if (type != saved_type)
    {
      val = value_copy (val);
      deprecated_set_value_type (val, type);
    }

  if (is_fixed_point_type (type))
    type = type->fixed_point_type_base_type ();

  switch (type->code ())
    {
    default:
      common_val_print (val, stream, recurse, options,
			language_def (language_c));
      break;

    case TYPE_CODE_PTR:
      ada_value_print_ptr (val, stream, recurse, options);
      break;

    case TYPE_CODE_INT:
    case TYPE_CODE_RANGE:
      ada_value_print_num (val, stream, recurse, options);
      break;

    case TYPE_CODE_ENUM:
      ada_val_print_enum (val, stream, recurse, options);
      break;

    case TYPE_CODE_FLT:
      if (options->format)
	{
	  common_val_print (val, stream, recurse, options,
			    language_def (language_c));
	  break;
	}

      ada_print_floating (valaddr, type, stream);
      break;

    case TYPE_CODE_UNION:
    case TYPE_CODE_STRUCT:
      ada_val_print_struct_union (val, stream, recurse, options);
      break;

    case TYPE_CODE_ARRAY:
      ada_value_print_array (val, stream, recurse, options);
      return;

    case TYPE_CODE_REF:
      ada_val_print_ref (type, valaddr, 0, 0,
			 address, stream, recurse, val,
			 options);
      break;
    }
}

/* See ada-lang.h.  */

void
ada_value_print_inner (struct value *val, struct ui_file *stream,
		       int recurse,
		       const struct value_print_options *options)
{
  try
    {
      ada_value_print_1 (val, stream, recurse, options);
    }
  catch (const gdb_exception_error &except)
    {
      fprintf_styled (stream, metadata_style.style (),
		      _("<error reading variable: %s>"),
		      except.what ());
    }
}

void
ada_value_print (struct value *val0, struct ui_file *stream,
		 const struct value_print_options *options)
{
  struct value *val = ada_to_fixed_value (val0);
  struct type *type = ada_check_typedef (value_type (val));
  struct value_print_options opts;

  /* If it is a pointer, indicate what it points to.  */
  if (type->code () == TYPE_CODE_PTR)
    {
      /* Hack:  don't print (char *) for char strings.  Their
	 type is indicated by the quoted string anyway.  */
      if (TYPE_LENGTH (TYPE_TARGET_TYPE (type)) != sizeof (char)
	  || TYPE_TARGET_TYPE (type)->code () != TYPE_CODE_INT
	  || TYPE_TARGET_TYPE (type)->is_unsigned ())
	{
	  fprintf_filtered (stream, "(");
	  type_print (type, "", stream, -1);
	  fprintf_filtered (stream, ") ");
	}
    }
  else if (ada_is_array_descriptor_type (type))
    {
      /* We do not print the type description unless TYPE is an array
	 access type (this is encoded by the compiler as a typedef to
	 a fat pointer - hence the check against TYPE_CODE_TYPEDEF).  */
      if (type->code () == TYPE_CODE_TYPEDEF)
	{
	  fprintf_filtered (stream, "(");
	  type_print (type, "", stream, -1);
	  fprintf_filtered (stream, ") ");
	}
    }
  else if (ada_is_bogus_array_descriptor (type))
    {
      fprintf_filtered (stream, "(");
      type_print (type, "", stream, -1);
      fprintf_filtered (stream, ") (...?)");
      return;
    }

  opts = *options;
  opts.deref_ref = 1;
  common_val_print (val, stream, 0, &opts, current_language);
}