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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [jv-valprint.c] - Blame information for rev 157

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1 24 jeremybenn
/* Support for printing Java values for GDB, the GNU debugger.
2
 
3
   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007,
4
   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 "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
#include "gdb_string.h"
34
 
35
/* Local functions */
36
 
37
int
38
java_value_print (struct value *val, struct ui_file *stream, int format,
39
                  enum val_prettyprint pretty)
40
{
41
  struct type *type;
42
  CORE_ADDR address;
43
  int i;
44
  char *name;
45
 
46
  type = value_type (val);
47
  address = VALUE_ADDRESS (val) + value_offset (val);
48
 
49
  if (is_object_type (type))
50
    {
51
      CORE_ADDR obj_addr;
52
 
53
      /* Get the run-time type, and cast the object into that */
54
 
55
      obj_addr = unpack_pointer (type, value_contents (val));
56
 
57
      if (obj_addr != 0)
58
        {
59
          type = type_from_class (java_class_from_object (val));
60
          type = lookup_pointer_type (type);
61
 
62
          val = value_at (type, address);
63
        }
64
    }
65
 
66
  if (TYPE_CODE (type) == TYPE_CODE_PTR && !value_logical_not (val))
67
    type_print (TYPE_TARGET_TYPE (type), "", stream, -1);
68
 
69
  name = TYPE_TAG_NAME (type);
70
  if (TYPE_CODE (type) == TYPE_CODE_STRUCT && name != NULL
71
      && (i = strlen (name), name[i - 1] == ']'))
72
    {
73
      gdb_byte buf4[4];
74
      long length;
75
      unsigned int things_printed = 0;
76
      int reps;
77
      struct type *el_type = java_primitive_type_from_name (name, i - 2);
78
 
79
      i = 0;
80
      read_memory (address + JAVA_OBJECT_SIZE, buf4, 4);
81
 
82
      length = (long) extract_signed_integer (buf4, 4);
83
      fprintf_filtered (stream, "{length: %ld", length);
84
 
85
      if (el_type == NULL)
86
        {
87
          CORE_ADDR element;
88
          CORE_ADDR next_element = -1; /* dummy initial value */
89
 
90
          address += JAVA_OBJECT_SIZE + 4;      /* Skip object header and length. */
91
 
92
          while (i < length && things_printed < print_max)
93
            {
94
              gdb_byte *buf;
95
 
96
              buf = alloca (gdbarch_ptr_bit (current_gdbarch) / HOST_CHAR_BIT);
97
              fputs_filtered (", ", stream);
98
              wrap_here (n_spaces (2));
99
 
100
              if (i > 0)
101
                element = next_element;
102
              else
103
                {
104
                  read_memory (address, buf, sizeof (buf));
105
                  address += gdbarch_ptr_bit (current_gdbarch) / HOST_CHAR_BIT;
106
                  /* FIXME: cagney/2003-05-24: Bogus or what.  It
107
                     pulls a host sized pointer out of the target and
108
                     then extracts that as an address (while assuming
109
                     that the address is unsigned)!  */
110
                  element = extract_unsigned_integer (buf, sizeof (buf));
111
                }
112
 
113
              for (reps = 1; i + reps < length; reps++)
114
                {
115
                  read_memory (address, buf, sizeof (buf));
116
                  address += gdbarch_ptr_bit (current_gdbarch) / HOST_CHAR_BIT;
117
                  /* FIXME: cagney/2003-05-24: Bogus or what.  It
118
                     pulls a host sized pointer out of the target and
119
                     then extracts that as an address (while assuming
120
                     that the address is unsigned)!  */
121
                  next_element = extract_unsigned_integer (buf, sizeof (buf));
122
                  if (next_element != element)
123
                    break;
124
                }
125
 
126
              if (reps == 1)
127
                fprintf_filtered (stream, "%d: ", i);
128
              else
129
                fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
130
 
131
              if (element == 0)
132
                fprintf_filtered (stream, "null");
133
              else
134
                fprintf_filtered (stream, "@%s", paddr_nz (element));
135
 
136
              things_printed++;
137
              i += reps;
138
            }
139
        }
140
      else
141
        {
142
          struct value *v = allocate_value (el_type);
143
          struct value *next_v = allocate_value (el_type);
144
 
145
          VALUE_ADDRESS (v) = address + JAVA_OBJECT_SIZE + 4;
146
          VALUE_ADDRESS (next_v) = VALUE_ADDRESS (v);
147
 
148
          while (i < length && things_printed < print_max)
149
            {
150
              fputs_filtered (", ", stream);
151
              wrap_here (n_spaces (2));
152
 
153
              if (i > 0)
154
                {
155
                  struct value *tmp;
156
 
157
                  tmp = next_v;
158
                  next_v = v;
159
                  v = tmp;
160
                }
161
              else
162
                {
163
                  set_value_lazy (v, 1);
164
                  set_value_offset (v, 0);
165
                }
166
 
167
              set_value_offset (next_v, value_offset (v));
168
 
169
              for (reps = 1; i + reps < length; reps++)
170
                {
171
                  set_value_lazy (next_v, 1);
172
                  set_value_offset (next_v, value_offset (next_v) + TYPE_LENGTH (el_type));
173
                  if (memcmp (value_contents (v), value_contents (next_v),
174
                              TYPE_LENGTH (el_type)) != 0)
175
                    break;
176
                }
177
 
178
              if (reps == 1)
179
                fprintf_filtered (stream, "%d: ", i);
180
              else
181
                fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
182
 
183
              common_val_print (v, stream, format, 2, 1, pretty);
184
 
185
              things_printed++;
186
              i += reps;
187
            }
188
        }
189
 
190
      if (i < length)
191
        fprintf_filtered (stream, "...");
192
 
193
      fprintf_filtered (stream, "}");
194
 
195
      return 0;
196
    }
197
 
198
  /* If it's type String, print it */
199
 
200
  if (TYPE_CODE (type) == TYPE_CODE_PTR
201
      && TYPE_TARGET_TYPE (type)
202
      && TYPE_TAG_NAME (TYPE_TARGET_TYPE (type))
203
      && strcmp (TYPE_TAG_NAME (TYPE_TARGET_TYPE (type)),
204
                 "java.lang.String") == 0
205
      && (format == 0 || format == 's')
206
      && address != 0
207
      && value_as_address (val) != 0)
208
    {
209
      struct value *data_val;
210
      CORE_ADDR data;
211
      struct value *boffset_val;
212
      unsigned long boffset;
213
      struct value *count_val;
214
      unsigned long count;
215
      struct value *mark;
216
 
217
      mark = value_mark ();     /* Remember start of new values */
218
 
219
      data_val = value_struct_elt (&val, NULL, "data", NULL, NULL);
220
      data = value_as_address (data_val);
221
 
222
      boffset_val = value_struct_elt (&val, NULL, "boffset", NULL, NULL);
223
      boffset = value_as_address (boffset_val);
224
 
225
      count_val = value_struct_elt (&val, NULL, "count", NULL, NULL);
226
      count = value_as_address (count_val);
227
 
228
      value_free_to_mark (mark);        /* Release unnecessary values */
229
 
230
      val_print_string (data + boffset, count, 2, stream);
231
 
232
      return 0;
233
    }
234
 
235
  return common_val_print (val, stream, format, 1, 0, pretty);
236
}
237
 
238
/* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
239
   same meanings as in cp_print_value and c_val_print.
240
 
241
   DONT_PRINT is an array of baseclass types that we
242
   should not print, or zero if called from top level.  */
243
 
244
static void
245
java_print_value_fields (struct type *type, const gdb_byte *valaddr,
246
                         CORE_ADDR address, struct ui_file *stream,
247
                         int format, int recurse, enum val_prettyprint pretty)
248
{
249
  int i, len, n_baseclasses;
250
 
251
  CHECK_TYPEDEF (type);
252
 
253
  fprintf_filtered (stream, "{");
254
  len = TYPE_NFIELDS (type);
255
  n_baseclasses = TYPE_N_BASECLASSES (type);
256
 
257
  if (n_baseclasses > 0)
258
    {
259
      int i, n_baseclasses = TYPE_N_BASECLASSES (type);
260
 
261
      for (i = 0; i < n_baseclasses; i++)
262
        {
263
          int boffset;
264
          struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
265
          char *basename = TYPE_NAME (baseclass);
266
          const gdb_byte *base_valaddr;
267
 
268
          if (BASETYPE_VIA_VIRTUAL (type, i))
269
            continue;
270
 
271
          if (basename != NULL && strcmp (basename, "java.lang.Object") == 0)
272
            continue;
273
 
274
          boffset = 0;
275
 
276
          if (pretty)
277
            {
278
              fprintf_filtered (stream, "\n");
279
              print_spaces_filtered (2 * (recurse + 1), stream);
280
            }
281
          fputs_filtered ("<", stream);
282
          /* Not sure what the best notation is in the case where there is no
283
             baseclass name.  */
284
          fputs_filtered (basename ? basename : "", stream);
285
          fputs_filtered ("> = ", stream);
286
 
287
          base_valaddr = valaddr;
288
 
289
          java_print_value_fields (baseclass, base_valaddr, address + boffset,
290
                                   stream, format, recurse + 1, pretty);
291
          fputs_filtered (", ", stream);
292
        }
293
 
294
    }
295
 
296
  if (!len && n_baseclasses == 1)
297
    fprintf_filtered (stream, "<No data fields>");
298
  else
299
    {
300
      int fields_seen = 0;
301
 
302
      for (i = n_baseclasses; i < len; i++)
303
        {
304
          /* If requested, skip printing of static fields.  */
305
          if (TYPE_FIELD_STATIC (type, i))
306
            {
307
              char *name = TYPE_FIELD_NAME (type, i);
308
              if (!static_field_print)
309
                continue;
310
              if (name != NULL && strcmp (name, "class") == 0)
311
                continue;
312
            }
313
          if (fields_seen)
314
            fprintf_filtered (stream, ", ");
315
          else if (n_baseclasses > 0)
316
            {
317
              if (pretty)
318
                {
319
                  fprintf_filtered (stream, "\n");
320
                  print_spaces_filtered (2 + 2 * recurse, stream);
321
                  fputs_filtered ("members of ", stream);
322
                  fputs_filtered (type_name_no_tag (type), stream);
323
                  fputs_filtered (": ", stream);
324
                }
325
            }
326
          fields_seen = 1;
327
 
328
          if (pretty)
329
            {
330
              fprintf_filtered (stream, "\n");
331
              print_spaces_filtered (2 + 2 * recurse, stream);
332
            }
333
          else
334
            {
335
              wrap_here (n_spaces (2 + 2 * recurse));
336
            }
337
          if (inspect_it)
338
            {
339
              if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
340
                fputs_filtered ("\"( ptr \"", stream);
341
              else
342
                fputs_filtered ("\"( nodef \"", stream);
343
              if (TYPE_FIELD_STATIC (type, i))
344
                fputs_filtered ("static ", stream);
345
              fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
346
                                       language_cplus,
347
                                       DMGL_PARAMS | DMGL_ANSI);
348
              fputs_filtered ("\" \"", stream);
349
              fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
350
                                       language_cplus,
351
                                       DMGL_PARAMS | DMGL_ANSI);
352
              fputs_filtered ("\") \"", stream);
353
            }
354
          else
355
            {
356
              annotate_field_begin (TYPE_FIELD_TYPE (type, i));
357
 
358
              if (TYPE_FIELD_STATIC (type, i))
359
                fputs_filtered ("static ", stream);
360
              fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
361
                                       language_cplus,
362
                                       DMGL_PARAMS | DMGL_ANSI);
363
              annotate_field_name_end ();
364
              fputs_filtered (": ", stream);
365
              annotate_field_value ();
366
            }
367
 
368
          if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))
369
            {
370
              struct value *v;
371
 
372
              /* Bitfields require special handling, especially due to byte
373
                 order problems.  */
374
              if (TYPE_FIELD_IGNORE (type, i))
375
                {
376
                  fputs_filtered ("<optimized out or zero length>", stream);
377
                }
378
              else
379
                {
380
                  v = value_from_longest (TYPE_FIELD_TYPE (type, i),
381
                                   unpack_field_as_long (type, valaddr, i));
382
 
383
                  common_val_print (v, stream, format, 0, recurse + 1, pretty);
384
                }
385
            }
386
          else
387
            {
388
              if (TYPE_FIELD_IGNORE (type, i))
389
                {
390
                  fputs_filtered ("<optimized out or zero length>", stream);
391
                }
392
              else if (TYPE_FIELD_STATIC (type, i))
393
                {
394
                  struct value *v = value_static_field (type, i);
395
                  if (v == NULL)
396
                    fputs_filtered ("<optimized out>", stream);
397
                  else
398
                    {
399
                      struct type *t = check_typedef (value_type (v));
400
                      if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
401
                        v = value_addr (v);
402
                      common_val_print (v, stream, format, 0, recurse + 1,
403
                                        pretty);
404
                    }
405
                }
406
              else if (TYPE_FIELD_TYPE (type, i) == NULL)
407
                fputs_filtered ("<unknown type>", stream);
408
              else
409
                {
410
                  val_print (TYPE_FIELD_TYPE (type, i),
411
                             valaddr + TYPE_FIELD_BITPOS (type, i) / 8, 0,
412
                             address + TYPE_FIELD_BITPOS (type, i) / 8,
413
                             stream, format, 0, recurse + 1, pretty);
414
                }
415
            }
416
          annotate_field_end ();
417
        }
418
 
419
      if (pretty)
420
        {
421
          fprintf_filtered (stream, "\n");
422
          print_spaces_filtered (2 * recurse, stream);
423
        }
424
    }
425
  fprintf_filtered (stream, "}");
426
}
427
 
428
/* Print data of type TYPE located at VALADDR (within GDB), which came from
429
   the inferior at address ADDRESS, onto stdio stream STREAM according to
430
   FORMAT (a letter or 0 for natural format).  The data at VALADDR is in
431
   target byte order.
432
 
433
   If the data are a string pointer, returns the number of string characters
434
   printed.
435
 
436
   If DEREF_REF is nonzero, then dereference references, otherwise just print
437
   them like pointers.
438
 
439
   The PRETTY parameter controls prettyprinting.  */
440
 
441
int
442
java_val_print (struct type *type, const gdb_byte *valaddr,
443
                int embedded_offset, CORE_ADDR address,
444
                struct ui_file *stream, int format, int deref_ref,
445
                int recurse, enum val_prettyprint pretty)
446
{
447
  unsigned int i = 0;    /* Number of characters printed */
448
  struct type *target_type;
449
  CORE_ADDR addr;
450
 
451
  CHECK_TYPEDEF (type);
452
  switch (TYPE_CODE (type))
453
    {
454
    case TYPE_CODE_PTR:
455
      if (format && format != 's')
456
        {
457
          print_scalar_formatted (valaddr, type, format, 0, stream);
458
          break;
459
        }
460
#if 0
461
      if (vtblprint && cp_is_vtbl_ptr_type (type))
462
        {
463
          /* Print the unmangled name if desired.  */
464
          /* Print vtable entry - we only get here if we ARE using
465
             -fvtable_thunks.  (Otherwise, look under TYPE_CODE_STRUCT.) */
466
          /* Extract an address, assume that it is unsigned.  */
467
          print_address_demangle (extract_unsigned_integer (valaddr, TYPE_LENGTH (type)),
468
                                  stream, demangle);
469
          break;
470
        }
471
#endif
472
      addr = unpack_pointer (type, valaddr);
473
      if (addr == 0)
474
        {
475
          fputs_filtered ("null", stream);
476
          return i;
477
        }
478
      target_type = check_typedef (TYPE_TARGET_TYPE (type));
479
 
480
      if (TYPE_CODE (target_type) == TYPE_CODE_FUNC)
481
        {
482
          /* Try to print what function it points to.  */
483
          print_address_demangle (addr, stream, demangle);
484
          /* Return value is irrelevant except for string pointers.  */
485
          return (0);
486
        }
487
 
488
      if (addressprint && format != 's')
489
        {
490
          fputs_filtered ("@", stream);
491
          print_longest (stream, 'x', 0, (ULONGEST) addr);
492
        }
493
 
494
      return i;
495
 
496
    case TYPE_CODE_CHAR:
497
    case TYPE_CODE_INT:
498
      /* Can't just call c_val_print because that prints bytes as C
499
         chars.  */
500
      format = format ? format : output_format;
501
      if (format)
502
        print_scalar_formatted (valaddr, type, format, 0, stream);
503
      else if (TYPE_CODE (type) == TYPE_CODE_CHAR
504
               || (TYPE_CODE (type) == TYPE_CODE_INT
505
                   && TYPE_LENGTH (type) == 2
506
                   && strcmp (TYPE_NAME (type), "char") == 0))
507
        LA_PRINT_CHAR ((int) unpack_long (type, valaddr), stream);
508
      else
509
        val_print_type_code_int (type, valaddr, stream);
510
      break;
511
 
512
    case TYPE_CODE_STRUCT:
513
      java_print_value_fields (type, valaddr, address, stream, format,
514
                               recurse, pretty);
515
      break;
516
 
517
    default:
518
      return c_val_print (type, valaddr, embedded_offset, address, stream,
519
                          format, deref_ref, recurse, pretty);
520
    }
521
 
522
  return 0;
523
}

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