OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-old/] [gdb-6.8/] [gdb/] [m2-valprint.c] - Blame information for rev 842

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 24 jeremybenn
/* Support for printing Modula 2 values for GDB, the GNU debugger.
2
 
3
   Copyright (C) 1986, 1988, 1989, 1991, 1992, 1996, 1998, 2000, 2005, 2006,
4
                 2007, 2008 Free Software Foundation, Inc.
5
 
6
   This file is part of GDB.
7
 
8
   This program is free software; you can redistribute it and/or modify
9
   it under the terms of the GNU General Public License as published by
10
   the Free Software Foundation; either version 3 of the License, or
11
   (at your option) any later version.
12
 
13
   This program is distributed in the hope that it will be useful,
14
   but WITHOUT ANY WARRANTY; without even the implied warranty of
15
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
   GNU General Public License for more details.
17
 
18
   You should have received a copy of the GNU General Public License
19
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
20
 
21
#include "defs.h"
22
#include "symtab.h"
23
#include "gdbtypes.h"
24
#include "expression.h"
25
#include "value.h"
26
#include "valprint.h"
27
#include "language.h"
28
#include "typeprint.h"
29
#include "c-lang.h"
30
#include "m2-lang.h"
31
#include "target.h"
32
 
33
int print_unpacked_pointer (struct type *type,
34
                            CORE_ADDR address, CORE_ADDR addr,
35
                            int format, struct ui_file *stream);
36
static void
37
m2_print_array_contents (struct type *type, const gdb_byte *valaddr,
38
                         int embedded_offset, CORE_ADDR address,
39
                         struct ui_file *stream, int format,
40
                         enum val_prettyprint pretty,
41
                         int deref_ref, int recurse, int len);
42
 
43
 
44
/* Print function pointer with inferior address ADDRESS onto stdio
45
   stream STREAM.  */
46
 
47
static void
48
print_function_pointer_address (CORE_ADDR address, struct ui_file *stream)
49
{
50
  CORE_ADDR func_addr = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
51
                                                            address,
52
                                                            &current_target);
53
 
54
  /* If the function pointer is represented by a description, print the
55
     address of the description.  */
56
  if (addressprint && func_addr != address)
57
    {
58
      fputs_filtered ("@", stream);
59
      fputs_filtered (paddress (address), stream);
60
      fputs_filtered (": ", stream);
61
    }
62
  print_address_demangle (func_addr, stream, demangle);
63
}
64
 
65
/* get_long_set_bounds - assigns the bounds of the long set to low and
66
                         high.  */
67
 
68
int
69
get_long_set_bounds (struct type *type, LONGEST *low, LONGEST *high)
70
{
71
  int len, i;
72
 
73
  if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
74
    {
75
      len = TYPE_NFIELDS (type);
76
      i = TYPE_N_BASECLASSES (type);
77
      if (len == 0)
78
        return 0;
79
      *low = TYPE_LOW_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)));
80
      *high = TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type,
81
                                                                 len-1)));
82
      return 1;
83
    }
84
  error (_("expecting long_set"));
85
  return 0;
86
}
87
 
88
static void
89
m2_print_long_set (struct type *type, const gdb_byte *valaddr,
90
                   int embedded_offset, CORE_ADDR address,
91
                   struct ui_file *stream, int format,
92
                   enum val_prettyprint pretty)
93
{
94
  int empty_set        = 1;
95
  int element_seen     = 0;
96
  LONGEST previous_low = 0;
97
  LONGEST previous_high= 0;
98
  LONGEST i, low_bound, high_bound;
99
  LONGEST field_low, field_high;
100
  struct type *range;
101
  int len, field;
102
  struct type *target;
103
  int bitval;
104
 
105
  CHECK_TYPEDEF (type);
106
 
107
  fprintf_filtered (stream, "{");
108
  len = TYPE_NFIELDS (type);
109
  if (get_long_set_bounds (type, &low_bound, &high_bound))
110
    {
111
      field = TYPE_N_BASECLASSES (type);
112
      range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
113
    }
114
  else
115
    {
116
      fprintf_filtered (stream, " %s }", _("<unknown bounds of set>"));
117
      return;
118
    }
119
 
120
  target = TYPE_TARGET_TYPE (range);
121
  if (target == NULL)
122
    target = builtin_type_int;
123
 
124
  if (get_discrete_bounds (range, &field_low, &field_high) >= 0)
125
    {
126
      for (i = low_bound; i <= high_bound; i++)
127
        {
128
          bitval = value_bit_index (TYPE_FIELD_TYPE (type, field),
129
                                    (TYPE_FIELD_BITPOS (type, field) / 8) +
130
                                    valaddr + embedded_offset, i);
131
          if (bitval < 0)
132
            error (_("bit test is out of range"));
133
          else if (bitval > 0)
134
            {
135
              previous_high = i;
136
              if (! element_seen)
137
                {
138
                  if (! empty_set)
139
                    fprintf_filtered (stream, ", ");
140
                  print_type_scalar (target, i, stream);
141
                  empty_set    = 0;
142
                  element_seen = 1;
143
                  previous_low = i;
144
                }
145
            }
146
          else
147
            {
148
              /* bit is not set */
149
              if (element_seen)
150
                {
151
                  if (previous_low+1 < previous_high)
152
                    fprintf_filtered (stream, "..");
153
                  if (previous_low+1 < previous_high)
154
                    print_type_scalar (target, previous_high, stream);
155
                  element_seen = 0;
156
                }
157
            }
158
          if (i == field_high)
159
            {
160
              field++;
161
              if (field == len)
162
                break;
163
              range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
164
              if (get_discrete_bounds (range, &field_low, &field_high) < 0)
165
                break;
166
              target = TYPE_TARGET_TYPE (range);
167
              if (target == NULL)
168
                target = builtin_type_int;
169
            }
170
        }
171
      if (element_seen)
172
        {
173
          if (previous_low+1 < previous_high)
174
            {
175
              fprintf_filtered (stream, "..");
176
              print_type_scalar (target, previous_high, stream);
177
            }
178
          element_seen = 0;
179
        }
180
      fprintf_filtered (stream, "}");
181
    }
182
}
183
 
184
static void
185
m2_print_unbounded_array (struct type *type, const gdb_byte *valaddr,
186
                          int embedded_offset, CORE_ADDR address,
187
                          struct ui_file *stream, int format,
188
                          int deref_ref, enum val_prettyprint pretty,
189
                          int recurse)
190
{
191
  struct type *content_type;
192
  CORE_ADDR addr;
193
  LONGEST len;
194
  struct value *val;
195
 
196
  CHECK_TYPEDEF (type);
197
  content_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0));
198
 
199
  addr = unpack_pointer (TYPE_FIELD_TYPE (type, 0),
200
                         (TYPE_FIELD_BITPOS (type, 0) / 8) +
201
                         valaddr + embedded_offset);
202
 
203
  val = value_at_lazy (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0)),
204
                       addr);
205
  len = unpack_field_as_long (type, valaddr + embedded_offset, 1);
206
 
207
  fprintf_filtered (stream, "{");
208
  m2_print_array_contents (value_type (val), value_contents(val),
209
                           value_embedded_offset (val), addr, stream,
210
                           format, deref_ref, pretty, recurse, len);
211
  fprintf_filtered (stream, ", HIGH = %d}", (int) len);
212
}
213
 
214
int
215
print_unpacked_pointer (struct type *type,
216
                        CORE_ADDR address, CORE_ADDR addr,
217
                        int format, struct ui_file *stream)
218
{
219
  struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
220
 
221
  if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
222
    {
223
      /* Try to print what function it points to.  */
224
      print_function_pointer_address (addr, stream);
225
      /* Return value is irrelevant except for string pointers.  */
226
      return 0;
227
    }
228
 
229
  if (addressprint && format != 's')
230
    fputs_filtered (paddress (address), stream);
231
 
232
  /* For a pointer to char or unsigned char, also print the string
233
     pointed to, unless pointer is null.  */
234
 
235
  if (TYPE_LENGTH (elttype) == 1
236
      && TYPE_CODE (elttype) == TYPE_CODE_INT
237
      && (format == 0 || format == 's')
238
      && addr != 0)
239
      return val_print_string (addr, -1, TYPE_LENGTH (elttype), stream);
240
 
241
  return 0;
242
}
243
 
244
static void
245
print_variable_at_address (struct type *type,
246
                           const gdb_byte *valaddr,
247
                           struct ui_file *stream, int format,
248
                           int deref_ref, int recurse,
249
                           enum val_prettyprint pretty)
250
{
251
  CORE_ADDR addr = unpack_pointer (type, valaddr);
252
  struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
253
 
254
  fprintf_filtered (stream, "[");
255
  fputs_filtered (paddress (addr), stream);
256
  fprintf_filtered (stream, "] : ");
257
 
258
  if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
259
    {
260
      struct value *deref_val =
261
        value_at
262
        (TYPE_TARGET_TYPE (type),
263
         unpack_pointer (lookup_pointer_type (builtin_type_void),
264
                         valaddr));
265
      common_val_print (deref_val, stream, format, deref_ref,
266
                        recurse, pretty);
267
    }
268
  else
269
    fputs_filtered ("???", stream);
270
}
271
 
272
 
273
/* m2_print_array_contents - prints out the contents of an
274
                             array up to a max_print values.
275
                             It prints arrays of char as a string
276
                             and all other data types as comma
277
                             separated values.  */
278
 
279
static void
280
m2_print_array_contents (struct type *type, const gdb_byte *valaddr,
281
                         int embedded_offset, CORE_ADDR address,
282
                         struct ui_file *stream, int format,
283
                         enum val_prettyprint pretty,
284
                         int deref_ref, int recurse, int len)
285
{
286
  int eltlen;
287
  CHECK_TYPEDEF (type);
288
 
289
  if (TYPE_LENGTH (type) > 0)
290
    {
291
      eltlen = TYPE_LENGTH (type);
292
      if (prettyprint_arrays)
293
        print_spaces_filtered (2 + 2 * recurse, stream);
294
      /* For an array of chars, print with string syntax.  */
295
      if (eltlen == 1 &&
296
          ((TYPE_CODE (type) == TYPE_CODE_INT)
297
           || ((current_language->la_language == language_m2)
298
               && (TYPE_CODE (type) == TYPE_CODE_CHAR)))
299
          && (format == 0 || format == 's'))
300
        val_print_string (address, len+1, eltlen, stream);
301
      else
302
        {
303
          fprintf_filtered (stream, "{");
304
          val_print_array_elements (type, valaddr + embedded_offset,
305
                                    address, stream, format,
306
                                    deref_ref, recurse, pretty, 0);
307
          fprintf_filtered (stream, "}");
308
        }
309
    }
310
}
311
 
312
 
313
/* Print data of type TYPE located at VALADDR (within GDB), which came from
314
   the inferior at address ADDRESS, onto stdio stream STREAM according to
315
   FORMAT (a letter or 0 for natural format).  The data at VALADDR is in
316
   target byte order.
317
 
318
   If the data are a string pointer, returns the number of string characters
319
   printed.
320
 
321
   If DEREF_REF is nonzero, then dereference references, otherwise just print
322
   them like pointers.
323
 
324
   The PRETTY parameter controls prettyprinting.  */
325
 
326
int
327
m2_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
328
              CORE_ADDR address, struct ui_file *stream, int format,
329
              int deref_ref, int recurse, enum val_prettyprint pretty)
330
{
331
  unsigned int i = 0;    /* Number of characters printed */
332
  unsigned len;
333
  struct type *elttype;
334
  unsigned eltlen;
335
  int length_pos, length_size, string_pos;
336
  int char_size;
337
  LONGEST val;
338
  CORE_ADDR addr;
339
 
340
  CHECK_TYPEDEF (type);
341
  switch (TYPE_CODE (type))
342
    {
343
    case TYPE_CODE_ARRAY:
344
      if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
345
        {
346
          elttype = check_typedef (TYPE_TARGET_TYPE (type));
347
          eltlen = TYPE_LENGTH (elttype);
348
          len = TYPE_LENGTH (type) / eltlen;
349
          if (prettyprint_arrays)
350
            print_spaces_filtered (2 + 2 * recurse, stream);
351
          /* For an array of chars, print with string syntax.  */
352
          if (eltlen == 1 &&
353
              ((TYPE_CODE (elttype) == TYPE_CODE_INT)
354
               || ((current_language->la_language == language_m2)
355
                   && (TYPE_CODE (elttype) == TYPE_CODE_CHAR)))
356
              && (format == 0 || format == 's'))
357
            {
358
              /* If requested, look for the first null char and only print
359
                 elements up to it.  */
360
              if (stop_print_at_null)
361
                {
362
                  unsigned int temp_len;
363
 
364
                  /* Look for a NULL char. */
365
                  for (temp_len = 0;
366
                       (valaddr + embedded_offset)[temp_len]
367
                         && temp_len < len && temp_len < print_max;
368
                       temp_len++);
369
                  len = temp_len;
370
                }
371
 
372
              LA_PRINT_STRING (stream, valaddr + embedded_offset, len, 1, 0);
373
              i = len;
374
            }
375
          else
376
            {
377
              fprintf_filtered (stream, "{");
378
              val_print_array_elements (type, valaddr + embedded_offset,
379
                                        address, stream, format, deref_ref,
380
                                        recurse, pretty, 0);
381
              fprintf_filtered (stream, "}");
382
            }
383
          break;
384
        }
385
      /* Array of unspecified length: treat like pointer to first elt.  */
386
      print_unpacked_pointer (type, address, address, format, stream);
387
      break;
388
 
389
    case TYPE_CODE_PTR:
390
      if (TYPE_CONST (type))
391
        print_variable_at_address (type, valaddr + embedded_offset,
392
                                   stream, format, deref_ref, recurse,
393
                                   pretty);
394
      else if (format && format != 's')
395
        print_scalar_formatted (valaddr + embedded_offset, type, format,
396
                                0, stream);
397
      else
398
        {
399
          addr = unpack_pointer (type, valaddr + embedded_offset);
400
          print_unpacked_pointer (type, addr, address, format, stream);
401
        }
402
      break;
403
 
404
    case TYPE_CODE_REF:
405
      elttype = check_typedef (TYPE_TARGET_TYPE (type));
406
      if (addressprint)
407
        {
408
          CORE_ADDR addr
409
            = extract_typed_address (valaddr + embedded_offset, type);
410
          fprintf_filtered (stream, "@");
411
          fputs_filtered (paddress (addr), stream);
412
          if (deref_ref)
413
            fputs_filtered (": ", stream);
414
        }
415
      /* De-reference the reference.  */
416
      if (deref_ref)
417
        {
418
          if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
419
            {
420
              struct value *deref_val =
421
                value_at
422
                (TYPE_TARGET_TYPE (type),
423
                 unpack_pointer (lookup_pointer_type (builtin_type_void),
424
                                 valaddr + embedded_offset));
425
              common_val_print (deref_val, stream, format, deref_ref,
426
                                recurse, pretty);
427
            }
428
          else
429
            fputs_filtered ("???", stream);
430
        }
431
      break;
432
 
433
    case TYPE_CODE_UNION:
434
      if (recurse && !unionprint)
435
        {
436
          fprintf_filtered (stream, "{...}");
437
          break;
438
        }
439
      /* Fall through.  */
440
    case TYPE_CODE_STRUCT:
441
      if (m2_is_long_set (type))
442
        m2_print_long_set (type, valaddr, embedded_offset, address,
443
                           stream, format, pretty);
444
      else if (m2_is_unbounded_array (type))
445
        m2_print_unbounded_array (type, valaddr, embedded_offset,
446
                                  address, stream, format, deref_ref,
447
                                  pretty, recurse);
448
      else
449
        cp_print_value_fields (type, type, valaddr, embedded_offset,
450
                               address, stream, format,
451
                               recurse, pretty, NULL, 0);
452
      break;
453
 
454
    case TYPE_CODE_ENUM:
455
      if (format)
456
        {
457
          print_scalar_formatted (valaddr + embedded_offset, type,
458
                                  format, 0, stream);
459
          break;
460
        }
461
      len = TYPE_NFIELDS (type);
462
      val = unpack_long (type, valaddr + embedded_offset);
463
      for (i = 0; i < len; i++)
464
        {
465
          QUIT;
466
          if (val == TYPE_FIELD_BITPOS (type, i))
467
            {
468
              break;
469
            }
470
        }
471
      if (i < len)
472
        {
473
          fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
474
        }
475
      else
476
        {
477
          print_longest (stream, 'd', 0, val);
478
        }
479
      break;
480
 
481
    case TYPE_CODE_FUNC:
482
      if (format)
483
        {
484
          print_scalar_formatted (valaddr + embedded_offset, type,
485
                                  format, 0, stream);
486
          break;
487
        }
488
      /* FIXME, we should consider, at least for ANSI C language, eliminating
489
         the distinction made between FUNCs and POINTERs to FUNCs.  */
490
      fprintf_filtered (stream, "{");
491
      type_print (type, "", stream, -1);
492
      fprintf_filtered (stream, "} ");
493
      /* Try to print what function it points to, and its address.  */
494
      print_address_demangle (address, stream, demangle);
495
      break;
496
 
497
    case TYPE_CODE_BOOL:
498
      format = format ? format : output_format;
499
      if (format)
500
        print_scalar_formatted (valaddr + embedded_offset, type,
501
                                format, 0, stream);
502
      else
503
        {
504
          val = unpack_long (type, valaddr + embedded_offset);
505
          if (val == 0)
506
            fputs_filtered ("FALSE", stream);
507
          else if (val == 1)
508
            fputs_filtered ("TRUE", stream);
509
          else
510
            fprintf_filtered (stream, "%ld)", (long int) val);
511
        }
512
      break;
513
 
514
    case TYPE_CODE_RANGE:
515
      if (TYPE_LENGTH (type) == TYPE_LENGTH (TYPE_TARGET_TYPE (type)))
516
        {
517
          m2_val_print (TYPE_TARGET_TYPE (type), valaddr, embedded_offset,
518
                        address, stream, format, deref_ref, recurse, pretty);
519
          break;
520
        }
521
      /* FIXME: create_range_type does not set the unsigned bit in a
522
         range type (I think it probably should copy it from the target
523
         type), so we won't print values which are too large to
524
         fit in a signed integer correctly.  */
525
      /* FIXME: Doesn't handle ranges of enums correctly.  (Can't just
526
         print with the target type, though, because the size of our type
527
         and the target type might differ).  */
528
      /* FALLTHROUGH */
529
 
530
    case TYPE_CODE_INT:
531
      format = format ? format : output_format;
532
      if (format)
533
        print_scalar_formatted (valaddr + embedded_offset, type, format,
534
                                0, stream);
535
      else
536
        val_print_type_code_int (type, valaddr + embedded_offset, stream);
537
      break;
538
 
539
    case TYPE_CODE_CHAR:
540
      format = format ? format : output_format;
541
      if (format)
542
        print_scalar_formatted (valaddr + embedded_offset, type,
543
                                format, 0, stream);
544
      else
545
        {
546
          val = unpack_long (type, valaddr + embedded_offset);
547
          if (TYPE_UNSIGNED (type))
548
            fprintf_filtered (stream, "%u", (unsigned int) val);
549
          else
550
            fprintf_filtered (stream, "%d", (int) val);
551
          fputs_filtered (" ", stream);
552
          LA_PRINT_CHAR ((unsigned char) val, stream);
553
        }
554
      break;
555
 
556
    case TYPE_CODE_FLT:
557
      if (format)
558
        print_scalar_formatted (valaddr + embedded_offset, type,
559
                                format, 0, stream);
560
      else
561
        print_floating (valaddr + embedded_offset, type, stream);
562
      break;
563
 
564
    case TYPE_CODE_METHOD:
565
      break;
566
 
567
    case TYPE_CODE_BITSTRING:
568
    case TYPE_CODE_SET:
569
      elttype = TYPE_INDEX_TYPE (type);
570
      CHECK_TYPEDEF (elttype);
571
      if (TYPE_STUB (elttype))
572
        {
573
          fprintf_filtered (stream, _("<incomplete type>"));
574
          gdb_flush (stream);
575
          break;
576
        }
577
      else
578
        {
579
          struct type *range = elttype;
580
          LONGEST low_bound, high_bound;
581
          int i;
582
          int is_bitstring = TYPE_CODE (type) == TYPE_CODE_BITSTRING;
583
          int need_comma = 0;
584
 
585
          if (is_bitstring)
586
            fputs_filtered ("B'", stream);
587
          else
588
            fputs_filtered ("{", stream);
589
 
590
          i = get_discrete_bounds (range, &low_bound, &high_bound);
591
        maybe_bad_bstring:
592
          if (i < 0)
593
            {
594
              fputs_filtered (_("<error value>"), stream);
595
              goto done;
596
            }
597
 
598
          for (i = low_bound; i <= high_bound; i++)
599
            {
600
              int element = value_bit_index (type, valaddr + embedded_offset,
601
                                             i);
602
              if (element < 0)
603
                {
604
                  i = element;
605
                  goto maybe_bad_bstring;
606
                }
607
              if (is_bitstring)
608
                fprintf_filtered (stream, "%d", element);
609
              else if (element)
610
                {
611
                  if (need_comma)
612
                    fputs_filtered (", ", stream);
613
                  print_type_scalar (range, i, stream);
614
                  need_comma = 1;
615
 
616
                  if (i + 1 <= high_bound
617
                      && value_bit_index (type, valaddr + embedded_offset,
618
                                          ++i))
619
                    {
620
                      int j = i;
621
                      fputs_filtered ("..", stream);
622
                      while (i + 1 <= high_bound
623
                             && value_bit_index (type,
624
                                                 valaddr + embedded_offset,
625
                                                 ++i))
626
                        j = i;
627
                      print_type_scalar (range, j, stream);
628
                    }
629
                }
630
            }
631
        done:
632
          if (is_bitstring)
633
            fputs_filtered ("'", stream);
634
          else
635
            fputs_filtered ("}", stream);
636
        }
637
      break;
638
 
639
    case TYPE_CODE_VOID:
640
      fprintf_filtered (stream, "void");
641
      break;
642
 
643
    case TYPE_CODE_ERROR:
644
      fprintf_filtered (stream, _("<error type>"));
645
      break;
646
 
647
    case TYPE_CODE_UNDEF:
648
      /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
649
         dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
650
         and no complete type for struct foo in that file.  */
651
      fprintf_filtered (stream, _("<incomplete type>"));
652
      break;
653
 
654
    default:
655
      error (_("Invalid m2 type code %d in symbol table."), TYPE_CODE (type));
656
    }
657
  gdb_flush (stream);
658
  return (0);
659
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.