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[/] [or1k/] [trunk/] [insight/] [gdb/] [jv-valprint.c] - Blame information for rev 1768

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1 578 markom
/* Support for printing Java values for GDB, the GNU debugger.
2
   Copyright 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
3
 
4
   This file is part of GDB.
5
 
6
   This program is free software; you can redistribute it and/or modify
7
   it under the terms of the GNU General Public License as published by
8
   the Free Software Foundation; either version 2 of the License, or
9
   (at your option) any later version.
10
 
11
   This program is distributed in the hope that it will be useful,
12
   but WITHOUT ANY WARRANTY; without even the implied warranty of
13
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14
   GNU General Public License for more details.
15
 
16
   You should have received a copy of the GNU General Public License
17
   along with this program; if not, write to the Free Software
18
   Foundation, Inc., 59 Temple Place - Suite 330,
19
   Boston, MA 02111-1307, USA.  */
20
 
21
#include "defs.h"
22
#include "symtab.h"
23
#include "gdbtypes.h"
24
#include "gdbcore.h"
25
#include "expression.h"
26
#include "value.h"
27
#include "demangle.h"
28
#include "valprint.h"
29
#include "language.h"
30
#include "jv-lang.h"
31
#include "c-lang.h"
32
#include "annotate.h"
33
 
34
/* Local functions */
35
 
36
static void java_print_value_fields (struct type * type, char *valaddr,
37
                                     CORE_ADDR address,
38
                                     struct ui_file *stream, int format,
39
                                     int recurse,
40
                                     enum val_prettyprint pretty);
41
 
42
 
43
int
44
java_value_print (value_ptr val, struct ui_file *stream, int format,
45
                  enum val_prettyprint pretty)
46
{
47
  struct type *type;
48
  CORE_ADDR address;
49
  int i;
50
  char *name;
51
 
52
  type = VALUE_TYPE (val);
53
  address = VALUE_ADDRESS (val) + VALUE_OFFSET (val);
54
 
55
  if (is_object_type (type))
56
    {
57
      CORE_ADDR obj_addr;
58
 
59
      /* Get the run-time type, and cast the object into that */
60
 
61
      obj_addr = unpack_pointer (type, VALUE_CONTENTS (val));
62
 
63
      if (obj_addr != 0)
64
        {
65
          type = type_from_class (java_class_from_object (val));
66
          type = lookup_pointer_type (type);
67
 
68
          val = value_at (type, address, NULL);
69
        }
70
    }
71
 
72
  if (TYPE_CODE (type) == TYPE_CODE_PTR && !value_logical_not (val))
73
    type_print (TYPE_TARGET_TYPE (type), "", stream, -1);
74
 
75
  name = TYPE_TAG_NAME (type);
76
  if (TYPE_CODE (type) == TYPE_CODE_STRUCT && name != NULL
77
      && (i = strlen (name), name[i - 1] == ']'))
78
    {
79
      char buf4[4];
80
      long length;
81
      unsigned int things_printed = 0;
82
      int reps;
83
      struct type *el_type = java_primitive_type_from_name (name, i - 2);
84
 
85
      i = 0;
86
      read_memory (address + JAVA_OBJECT_SIZE, buf4, 4);
87
 
88
      length = (long) extract_signed_integer (buf4, 4);
89
      fprintf_filtered (stream, "{length: %ld", length);
90
 
91
      if (el_type == NULL)
92
        {
93
          CORE_ADDR element;
94
          CORE_ADDR next_element = -1; /* dummy initial value */
95
 
96
          address += JAVA_OBJECT_SIZE + 4;      /* Skip object header and length. */
97
 
98
          while (i < length && things_printed < print_max)
99
            {
100
              char *buf;
101
 
102
              buf = alloca (TARGET_PTR_BIT / HOST_CHAR_BIT);
103
              fputs_filtered (", ", stream);
104
              wrap_here (n_spaces (2));
105
 
106
              if (i > 0)
107
                element = next_element;
108
              else
109
                {
110
                  read_memory (address, buf, sizeof (buf));
111
                  address += TARGET_PTR_BIT / HOST_CHAR_BIT;
112
                  element = extract_address (buf, sizeof (buf));
113
                }
114
 
115
              for (reps = 1; i + reps < length; reps++)
116
                {
117
                  read_memory (address, buf, sizeof (buf));
118
                  address += TARGET_PTR_BIT / HOST_CHAR_BIT;
119
                  next_element = extract_address (buf, sizeof (buf));
120
                  if (next_element != element)
121
                    break;
122
                }
123
 
124
              if (reps == 1)
125
                fprintf_filtered (stream, "%d: ", i);
126
              else
127
                fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
128
 
129
              if (element == 0)
130
                fprintf_filtered (stream, "null");
131
              else
132
                fprintf_filtered (stream, "@%s", paddr_nz (element));
133
 
134
              things_printed++;
135
              i += reps;
136
            }
137
        }
138
      else
139
        {
140
          value_ptr v = allocate_value (el_type);
141
          value_ptr next_v = allocate_value (el_type);
142
 
143
          VALUE_ADDRESS (v) = address + JAVA_OBJECT_SIZE + 4;
144
          VALUE_ADDRESS (next_v) = VALUE_ADDRESS (v);
145
 
146
          while (i < length && things_printed < print_max)
147
            {
148
              fputs_filtered (", ", stream);
149
              wrap_here (n_spaces (2));
150
 
151
              if (i > 0)
152
                {
153
                  value_ptr tmp;
154
 
155
                  tmp = next_v;
156
                  next_v = v;
157
                  v = tmp;
158
                }
159
              else
160
                {
161
                  VALUE_LAZY (v) = 1;
162
                  VALUE_OFFSET (v) = 0;
163
                }
164
 
165
              VALUE_OFFSET (next_v) = VALUE_OFFSET (v);
166
 
167
              for (reps = 1; i + reps < length; reps++)
168
                {
169
                  VALUE_LAZY (next_v) = 1;
170
                  VALUE_OFFSET (next_v) += TYPE_LENGTH (el_type);
171
                  if (memcmp (VALUE_CONTENTS (v), VALUE_CONTENTS (next_v),
172
                              TYPE_LENGTH (el_type)) != 0)
173
                    break;
174
                }
175
 
176
              if (reps == 1)
177
                fprintf_filtered (stream, "%d: ", i);
178
              else
179
                fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
180
 
181
              val_print (VALUE_TYPE (v), VALUE_CONTENTS (v), 0, 0,
182
                         stream, format, 2, 1, pretty);
183
 
184
              things_printed++;
185
              i += reps;
186
            }
187
        }
188
 
189
      if (i < length)
190
        fprintf_filtered (stream, "...");
191
 
192
      fprintf_filtered (stream, "}");
193
 
194
      return 0;
195
    }
196
 
197
  /* If it's type String, print it */
198
 
199
  if (TYPE_CODE (type) == TYPE_CODE_PTR
200
      && TYPE_TARGET_TYPE (type)
201
      && TYPE_NAME (TYPE_TARGET_TYPE (type))
202
      && strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type)), "java.lang.String") == 0
203
      && (format == 0 || format == 's')
204
      && address != 0
205
      && value_as_pointer (val) != 0)
206
    {
207
      value_ptr data_val;
208
      CORE_ADDR data;
209
      value_ptr boffset_val;
210
      unsigned long boffset;
211
      value_ptr count_val;
212
      unsigned long count;
213
      value_ptr mark;
214
 
215
      mark = value_mark ();     /* Remember start of new values */
216
 
217
      data_val = value_struct_elt (&val, NULL, "data", NULL, NULL);
218
      data = value_as_pointer (data_val);
219
 
220
      boffset_val = value_struct_elt (&val, NULL, "boffset", NULL, NULL);
221
      boffset = value_as_pointer (boffset_val);
222
 
223
      count_val = value_struct_elt (&val, NULL, "count", NULL, NULL);
224
      count = value_as_pointer (count_val);
225
 
226
      value_free_to_mark (mark);        /* Release unnecessary values */
227
 
228
      val_print_string (data + boffset, count, 2, stream);
229
 
230
      return 0;
231
    }
232
 
233
  return (val_print (type, VALUE_CONTENTS (val), 0, address,
234
                     stream, format, 1, 0, pretty));
235
}
236
 
237
/* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
238
   same meanings as in cp_print_value and c_val_print.
239
 
240
   DONT_PRINT is an array of baseclass types that we
241
   should not print, or zero if called from top level.  */
242
 
243
static void
244
java_print_value_fields (struct type *type, char *valaddr, CORE_ADDR address,
245
                         struct ui_file *stream, int format, int recurse,
246
                         enum val_prettyprint pretty)
247
{
248
  int i, len, n_baseclasses;
249
 
250
  CHECK_TYPEDEF (type);
251
 
252
  fprintf_filtered (stream, "{");
253
  len = TYPE_NFIELDS (type);
254
  n_baseclasses = TYPE_N_BASECLASSES (type);
255
 
256
  if (n_baseclasses > 0)
257
    {
258
      int i, n_baseclasses = TYPE_N_BASECLASSES (type);
259
 
260
      for (i = 0; i < n_baseclasses; i++)
261
        {
262
          int boffset;
263
          struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
264
          char *basename = TYPE_NAME (baseclass);
265
          char *base_valaddr;
266
 
267
          if (BASETYPE_VIA_VIRTUAL (type, i))
268
            continue;
269
 
270
          if (basename != NULL && strcmp (basename, "java.lang.Object") == 0)
271
            continue;
272
 
273
          boffset = 0;
274
 
275
          if (pretty)
276
            {
277
              fprintf_filtered (stream, "\n");
278
              print_spaces_filtered (2 * (recurse + 1), stream);
279
            }
280
          fputs_filtered ("<", stream);
281
          /* Not sure what the best notation is in the case where there is no
282
             baseclass name.  */
283
          fputs_filtered (basename ? basename : "", stream);
284
          fputs_filtered ("> = ", stream);
285
 
286
          base_valaddr = valaddr;
287
 
288
          java_print_value_fields (baseclass, base_valaddr, address + boffset,
289
                                   stream, format, recurse + 1, pretty);
290
          fputs_filtered (", ", stream);
291
 
292
        flush_it:
293
          ;
294
        }
295
 
296
    }
297
 
298
  if (!len && n_baseclasses == 1)
299
    fprintf_filtered (stream, "<No data fields>");
300
  else
301
    {
302
      extern int inspect_it;
303
      int fields_seen = 0;
304
 
305
      for (i = n_baseclasses; i < len; i++)
306
        {
307
          /* If requested, skip printing of static fields.  */
308
          if (TYPE_FIELD_STATIC (type, i))
309
            {
310
              char *name = TYPE_FIELD_NAME (type, i);
311
              if (!static_field_print)
312
                continue;
313
              if (name != NULL && strcmp (name, "class") == 0)
314
                continue;
315
            }
316
          if (fields_seen)
317
            fprintf_filtered (stream, ", ");
318
          else if (n_baseclasses > 0)
319
            {
320
              if (pretty)
321
                {
322
                  fprintf_filtered (stream, "\n");
323
                  print_spaces_filtered (2 + 2 * recurse, stream);
324
                  fputs_filtered ("members of ", stream);
325
                  fputs_filtered (type_name_no_tag (type), stream);
326
                  fputs_filtered (": ", stream);
327
                }
328
            }
329
          fields_seen = 1;
330
 
331
          if (pretty)
332
            {
333
              fprintf_filtered (stream, "\n");
334
              print_spaces_filtered (2 + 2 * recurse, stream);
335
            }
336
          else
337
            {
338
              wrap_here (n_spaces (2 + 2 * recurse));
339
            }
340
          if (inspect_it)
341
            {
342
              if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
343
                fputs_filtered ("\"( ptr \"", stream);
344
              else
345
                fputs_filtered ("\"( nodef \"", stream);
346
              if (TYPE_FIELD_STATIC (type, i))
347
                fputs_filtered ("static ", stream);
348
              fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
349
                                       language_cplus,
350
                                       DMGL_PARAMS | DMGL_ANSI);
351
              fputs_filtered ("\" \"", stream);
352
              fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
353
                                       language_cplus,
354
                                       DMGL_PARAMS | DMGL_ANSI);
355
              fputs_filtered ("\") \"", stream);
356
            }
357
          else
358
            {
359
              annotate_field_begin (TYPE_FIELD_TYPE (type, i));
360
 
361
              if (TYPE_FIELD_STATIC (type, i))
362
                fputs_filtered ("static ", stream);
363
              fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
364
                                       language_cplus,
365
                                       DMGL_PARAMS | DMGL_ANSI);
366
              annotate_field_name_end ();
367
              fputs_filtered (": ", stream);
368
              annotate_field_value ();
369
            }
370
 
371
          if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))
372
            {
373
              value_ptr v;
374
 
375
              /* Bitfields require special handling, especially due to byte
376
                 order problems.  */
377
              if (TYPE_FIELD_IGNORE (type, i))
378
                {
379
                  fputs_filtered ("<optimized out or zero length>", stream);
380
                }
381
              else
382
                {
383
                  v = value_from_longest (TYPE_FIELD_TYPE (type, i),
384
                                   unpack_field_as_long (type, valaddr, i));
385
 
386
                  val_print (TYPE_FIELD_TYPE (type, i), VALUE_CONTENTS (v), 0,
387
                             0, stream, format, 0, recurse + 1, pretty);
388
                }
389
            }
390
          else
391
            {
392
              if (TYPE_FIELD_IGNORE (type, i))
393
                {
394
                  fputs_filtered ("<optimized out or zero length>", stream);
395
                }
396
              else if (TYPE_FIELD_STATIC (type, i))
397
                {
398
                  value_ptr v = value_static_field (type, i);
399
                  if (v == NULL)
400
                    fputs_filtered ("<optimized out>", stream);
401
                  else
402
                    {
403
                      struct type *t = check_typedef (VALUE_TYPE (v));
404
                      if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
405
                        v = value_addr (v);
406
                      val_print (VALUE_TYPE (v),
407
                                 VALUE_CONTENTS (v), 0, VALUE_ADDRESS (v),
408
                                 stream, format, 0, recurse + 1, pretty);
409
                    }
410
                }
411
              else if (TYPE_FIELD_TYPE (type, i) == NULL)
412
                fputs_filtered ("<unknown type>", stream);
413
              else
414
                {
415
                  val_print (TYPE_FIELD_TYPE (type, i),
416
                             valaddr + TYPE_FIELD_BITPOS (type, i) / 8, 0,
417
                             address + TYPE_FIELD_BITPOS (type, i) / 8,
418
                             stream, format, 0, recurse + 1, pretty);
419
                }
420
            }
421
          annotate_field_end ();
422
        }
423
 
424
      if (pretty)
425
        {
426
          fprintf_filtered (stream, "\n");
427
          print_spaces_filtered (2 * recurse, stream);
428
        }
429
    }
430
  fprintf_filtered (stream, "}");
431
}
432
 
433
/* Print data of type TYPE located at VALADDR (within GDB), which came from
434
   the inferior at address ADDRESS, onto stdio stream STREAM according to
435
   FORMAT (a letter or 0 for natural format).  The data at VALADDR is in
436
   target byte order.
437
 
438
   If the data are a string pointer, returns the number of string characters
439
   printed.
440
 
441
   If DEREF_REF is nonzero, then dereference references, otherwise just print
442
   them like pointers.
443
 
444
   The PRETTY parameter controls prettyprinting.  */
445
 
446
int
447
java_val_print (struct type *type, char *valaddr, int embedded_offset,
448
                CORE_ADDR address, struct ui_file *stream, int format,
449
                int deref_ref, int recurse, enum val_prettyprint pretty)
450
{
451
  register unsigned int i = 0;   /* Number of characters printed */
452
  struct type *target_type;
453
  CORE_ADDR addr;
454
 
455
  CHECK_TYPEDEF (type);
456
  switch (TYPE_CODE (type))
457
    {
458
    case TYPE_CODE_PTR:
459
      if (format && format != 's')
460
        {
461
          print_scalar_formatted (valaddr, type, format, 0, stream);
462
          break;
463
        }
464
#if 0
465
      if (vtblprint && cp_is_vtbl_ptr_type (type))
466
        {
467
          /* Print the unmangled name if desired.  */
468
          /* Print vtable entry - we only get here if we ARE using
469
             -fvtable_thunks.  (Otherwise, look under TYPE_CODE_STRUCT.) */
470
          print_address_demangle (extract_address (valaddr, TYPE_LENGTH (type)),
471
                                  stream, demangle);
472
          break;
473
        }
474
#endif
475
      addr = unpack_pointer (type, valaddr);
476
      if (addr == 0)
477
        {
478
          fputs_filtered ("null", stream);
479
          return i;
480
        }
481
      target_type = check_typedef (TYPE_TARGET_TYPE (type));
482
 
483
      if (TYPE_CODE (target_type) == TYPE_CODE_FUNC)
484
        {
485
          /* Try to print what function it points to.  */
486
          print_address_demangle (addr, stream, demangle);
487
          /* Return value is irrelevant except for string pointers.  */
488
          return (0);
489
        }
490
 
491
      if (addressprint && format != 's')
492
        {
493
          fputs_filtered ("@", stream);
494
          print_longest (stream, 'x', 0, (ULONGEST) addr);
495
        }
496
 
497
      return i;
498
 
499
    case TYPE_CODE_CHAR:
500
      format = format ? format : output_format;
501
      if (format)
502
        print_scalar_formatted (valaddr, type, format, 0, stream);
503
      else
504
        LA_PRINT_CHAR ((int) unpack_long (type, valaddr), stream);
505
      break;
506
 
507
    case TYPE_CODE_INT:
508
      /* Can't just call c_val_print because that print bytes as C chars. */
509
      format = format ? format : output_format;
510
      if (format)
511
        print_scalar_formatted (valaddr, type, format, 0, stream);
512
      else
513
        val_print_type_code_int (type, valaddr, stream);
514
      break;
515
 
516
    case TYPE_CODE_STRUCT:
517
      java_print_value_fields (type, valaddr, address, stream, format,
518
                               recurse, pretty);
519
      break;
520
 
521
    default:
522
      return c_val_print (type, valaddr, embedded_offset, address, stream,
523
                          format, deref_ref, recurse, pretty);
524
    }
525
 
526
  return 0;
527
}

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