aboutsummaryrefslogtreecommitdiff
path: root/gdb/jv-lang.c
blob: 3afdebdb46727fdbe622493f1c4c167d525a66da (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
/* Java language support routines for GDB, the GNU debugger.
   Copyright 1997, 1998, 1999, 2000 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 2 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, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include "defs.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "parser-defs.h"
#include "language.h"
#include "gdbtypes.h"
#include "symtab.h"
#include "symfile.h"
#include "objfiles.h"
#include "gdb_string.h"
#include "value.h"
#include "c-lang.h"
#include "jv-lang.h"
#include "gdbcore.h"
#include <ctype.h>

struct type *java_int_type;
struct type *java_byte_type;
struct type *java_short_type;
struct type *java_long_type;
struct type *java_boolean_type;
struct type *java_char_type;
struct type *java_float_type;
struct type *java_double_type;
struct type *java_void_type;

/* Local functions */

extern void _initialize_java_language (void);

static int java_demangled_signature_length (char *);
static void java_demangled_signature_copy (char *, char *);

static struct symtab *get_java_class_symtab (void);
static char *get_java_utf8_name (struct obstack *obstack, struct value *name);
static int java_class_is_primitive (struct value *clas);
static struct type *java_lookup_type (char *signature);
static struct value *java_value_string (char *ptr, int len);

static void java_emit_char (int c, struct ui_file * stream, int quoter);

/* This objfile contains symtabs that have been dynamically created
   to record dynamically loaded Java classes and dynamically
   compiled java methods. */

static struct objfile *dynamics_objfile = NULL;

static struct type *java_link_class_type (struct type *, struct value *);

static struct objfile *
get_dynamics_objfile (void)
{
  if (dynamics_objfile == NULL)
    {
      dynamics_objfile = allocate_objfile (NULL, 0);
    }
  return dynamics_objfile;
}

#if 1
/* symtab contains classes read from the inferior. */

static struct symtab *class_symtab = NULL;

/* Maximum number of class in class_symtab before relocation is needed. */

static int class_symtab_space;

static struct symtab *
get_java_class_symtab (void)
{
  if (class_symtab == NULL)
    {
      struct objfile *objfile = get_dynamics_objfile ();
      struct blockvector *bv;
      struct block *bl;
      class_symtab = allocate_symtab ("<java-classes>", objfile);
      class_symtab->language = language_java;
      bv = (struct blockvector *)
	obstack_alloc (&objfile->symbol_obstack, sizeof (struct blockvector));
      BLOCKVECTOR_NBLOCKS (bv) = 1;
      BLOCKVECTOR (class_symtab) = bv;

      /* Allocate dummy STATIC_BLOCK. */
      bl = (struct block *)
	obstack_alloc (&objfile->symbol_obstack, sizeof (struct block));
      BLOCK_NSYMS (bl) = 0;
      BLOCK_HASHTABLE (bl) = 0;
      BLOCK_START (bl) = 0;
      BLOCK_END (bl) = 0;
      BLOCK_FUNCTION (bl) = NULL;
      BLOCK_SUPERBLOCK (bl) = NULL;
      BLOCK_GCC_COMPILED (bl) = 0;
      BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = bl;

      /* Allocate GLOBAL_BLOCK.  This has to be relocatable. */
      class_symtab_space = 128;
      bl = xmmalloc (objfile->md,
		     sizeof (struct block)
		     + ((class_symtab_space - 1) * sizeof (struct symbol *)));
      *bl = *BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
      BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
      class_symtab->free_ptr = (char *) bl;
    }
  return class_symtab;
}

static void
add_class_symtab_symbol (struct symbol *sym)
{
  struct symtab *symtab = get_java_class_symtab ();
  struct blockvector *bv = BLOCKVECTOR (symtab);
  struct block *bl = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
  if (BLOCK_NSYMS (bl) >= class_symtab_space)
    {
      /* Need to re-allocate. */
      class_symtab_space *= 2;
      bl = xmrealloc (symtab->objfile->md, bl,
		      sizeof (struct block)
		      + ((class_symtab_space - 1) * sizeof (struct symbol *)));
      class_symtab->free_ptr = (char *) bl;
      BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
    }

  BLOCK_SYM (bl, BLOCK_NSYMS (bl)) = sym;
  BLOCK_NSYMS (bl) = BLOCK_NSYMS (bl) + 1;
}

static struct symbol *add_class_symbol (struct type *type, CORE_ADDR addr);

static struct symbol *
add_class_symbol (struct type *type, CORE_ADDR addr)
{
  struct symbol *sym;
  sym = (struct symbol *)
    obstack_alloc (&dynamics_objfile->symbol_obstack, sizeof (struct symbol));
  memset (sym, 0, sizeof (struct symbol));
  SYMBOL_LANGUAGE (sym) = language_java;
  SYMBOL_NAME (sym) = TYPE_TAG_NAME (type);
  SYMBOL_CLASS (sym) = LOC_TYPEDEF;
  /*  SYMBOL_VALUE (sym) = valu; */
  SYMBOL_TYPE (sym) = type;
  SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
  SYMBOL_VALUE_ADDRESS (sym) = addr;
  return sym;
}
#endif

struct type *
java_lookup_class (char *name)
{
  struct symbol *sym;
  sym = lookup_symbol (name, expression_context_block, STRUCT_NAMESPACE,
		       (int *) 0, (struct symtab **) NULL);
  if (sym != NULL)
    return SYMBOL_TYPE (sym);
#if 0
  CORE_ADDR addr;
  if (called from parser)
    {
      call lookup_class (or similar) in inferior;
      if not
      found:
	return NULL;
      addr = found in inferior;
    }
  else
    addr = 0;
  struct type *type;
  type = alloc_type (objfile);
  TYPE_CODE (type) = TYPE_CODE_STRUCT;
  INIT_CPLUS_SPECIFIC (type);
  TYPE_TAG_NAME (type) = obsavestring (name, strlen (name), &objfile->type_obstack);
  TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
  TYPE ? = addr;
  return type;
#else
  /* FIXME - should search inferior's symbol table. */
  return NULL;
#endif
}

/* Return a nul-terminated string (allocated on OBSTACK) for
   a name given by NAME (which has type Utf8Const*). */

char *
get_java_utf8_name (struct obstack *obstack, struct value *name)
{
  char *chrs;
  struct value *temp = name;
  int name_length;
  CORE_ADDR data_addr;
  temp = value_struct_elt (&temp, NULL, "length", NULL, "structure");
  name_length = (int) value_as_long (temp);
  data_addr = VALUE_ADDRESS (temp) + VALUE_OFFSET (temp)
    + TYPE_LENGTH (VALUE_TYPE (temp));
  chrs = obstack_alloc (obstack, name_length + 1);
  chrs[name_length] = '\0';
  read_memory (data_addr, chrs, name_length);
  return chrs;
}

struct value *
java_class_from_object (struct value *obj_val)
{
  /* This is all rather inefficient, since the offsets of vtable and
     class are fixed.  FIXME */
  struct value *vtable_val;

  if (TYPE_CODE (VALUE_TYPE (obj_val)) == TYPE_CODE_PTR
      && TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (obj_val))) == 0)
    obj_val = value_at (get_java_object_type (),
			value_as_address (obj_val), NULL);

  vtable_val = value_struct_elt (&obj_val, NULL, "vtable", NULL, "structure");
  return value_struct_elt (&vtable_val, NULL, "class", NULL, "structure");
}

/* Check if CLASS_IS_PRIMITIVE(value of clas): */
static int
java_class_is_primitive (struct value *clas)
{
  struct value *vtable = value_struct_elt (&clas, NULL, "vtable", NULL, "struct");
  CORE_ADDR i = value_as_address (vtable);
  return (int) (i & 0x7fffffff) == (int) 0x7fffffff;
}

/* Read a GCJ Class object, and generated a gdb (TYPE_CODE_STRUCT) type. */

struct type *
type_from_class (struct value *clas)
{
  struct type *type;
  char *name;
  struct value *temp;
  struct objfile *objfile;
  struct value *utf8_name;
  char *nptr;
  CORE_ADDR addr;
  struct block *bl;
  int i;
  int is_array = 0;

  type = check_typedef (VALUE_TYPE (clas));
  if (TYPE_CODE (type) == TYPE_CODE_PTR)
    {
      if (value_logical_not (clas))
	return NULL;
      clas = value_ind (clas);
    }
  addr = VALUE_ADDRESS (clas) + VALUE_OFFSET (clas);

#if 0
  get_java_class_symtab ();
  bl = BLOCKVECTOR_BLOCK (BLOCKVECTOR (class_symtab), GLOBAL_BLOCK);
  for (i = BLOCK_NSYMS (bl); --i >= 0;)
    {
      struct symbol *sym = BLOCK_SYM (bl, i);
      if (SYMBOL_VALUE_ADDRESS (sym) == addr)
	return SYMBOL_TYPE (sym);
    }
#endif

  objfile = get_dynamics_objfile ();
  if (java_class_is_primitive (clas))
    {
      struct value *sig;
      temp = clas;
      sig = value_struct_elt (&temp, NULL, "method_count", NULL, "structure");
      return java_primitive_type (value_as_long (sig));
    }

  /* Get Class name. */
  /* if clasloader non-null, prepend loader address. FIXME */
  temp = clas;
  utf8_name = value_struct_elt (&temp, NULL, "name", NULL, "structure");
  name = get_java_utf8_name (&objfile->type_obstack, utf8_name);
  for (nptr = name; *nptr != 0; nptr++)
    {
      if (*nptr == '/')
	*nptr = '.';
    }

  type = java_lookup_class (name);
  if (type != NULL)
    return type;

  type = alloc_type (objfile);
  TYPE_CODE (type) = TYPE_CODE_STRUCT;
  INIT_CPLUS_SPECIFIC (type);

  if (name[0] == '[')
    {
      char *signature = name;
      int namelen = java_demangled_signature_length (signature);
      if (namelen > strlen (name))
	name = obstack_alloc (&objfile->type_obstack, namelen + 1);
      java_demangled_signature_copy (name, signature);
      name[namelen] = '\0';
      is_array = 1;
      temp = clas;
      /* Set array element type. */
      temp = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
      VALUE_TYPE (temp) = lookup_pointer_type (VALUE_TYPE (clas));
      TYPE_TARGET_TYPE (type) = type_from_class (temp);
    }

  ALLOCATE_CPLUS_STRUCT_TYPE (type);
  TYPE_TAG_NAME (type) = name;

  add_class_symtab_symbol (add_class_symbol (type, addr));
  return java_link_class_type (type, clas);
}

/* Fill in class TYPE with data from the CLAS value. */

struct type *
java_link_class_type (struct type *type, struct value *clas)
{
  struct value *temp;
  char *unqualified_name;
  char *name = TYPE_TAG_NAME (type);
  int ninterfaces, nfields, nmethods;
  int type_is_object = 0;
  struct fn_field *fn_fields;
  struct fn_fieldlist *fn_fieldlists;
  struct value *fields;
  struct value *methods;
  struct value *method = NULL;
  struct value *field = NULL;
  int i, j;
  struct objfile *objfile = get_dynamics_objfile ();
  struct type *tsuper;

  unqualified_name = strrchr (name, '.');
  if (unqualified_name == NULL)
    unqualified_name = name;

  temp = clas;
  temp = value_struct_elt (&temp, NULL, "superclass", NULL, "structure");
  if (name != NULL && strcmp (name, "java.lang.Object") == 0)
    {
      tsuper = get_java_object_type ();
      if (tsuper && TYPE_CODE (tsuper) == TYPE_CODE_PTR)
	tsuper = TYPE_TARGET_TYPE (tsuper);
      type_is_object = 1;
    }
  else
    tsuper = type_from_class (temp);

#if 1
  ninterfaces = 0;
#else
  temp = clas;
  ninterfaces = value_as_long (value_struct_elt (&temp, NULL, "interface_len", NULL, "structure"));
#endif
  TYPE_N_BASECLASSES (type) = (tsuper == NULL ? 0 : 1) + ninterfaces;
  temp = clas;
  nfields = value_as_long (value_struct_elt (&temp, NULL, "field_count", NULL, "structure"));
  nfields += TYPE_N_BASECLASSES (type);
  nfields++;			/* Add one for dummy "class" field. */
  TYPE_NFIELDS (type) = nfields;
  TYPE_FIELDS (type) = (struct field *)
    TYPE_ALLOC (type, sizeof (struct field) * nfields);

  memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);

  TYPE_FIELD_PRIVATE_BITS (type) =
    (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
  B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);

  TYPE_FIELD_PROTECTED_BITS (type) =
    (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
  B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);

  TYPE_FIELD_IGNORE_BITS (type) =
    (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
  B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);

  TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
    TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
  B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));

  if (tsuper != NULL)
    {
      TYPE_BASECLASS (type, 0) = tsuper;
      if (type_is_object)
	SET_TYPE_FIELD_PRIVATE (type, 0);
    }

  i = strlen (name);
  if (i > 2 && name[i - 1] == ']' && tsuper != NULL)
    {
      /* FIXME */
      TYPE_LENGTH (type) = TYPE_LENGTH (tsuper) + 4;	/* size with "length" */
    }
  else
    {
      temp = clas;
      temp = value_struct_elt (&temp, NULL, "size_in_bytes", NULL, "structure");
      TYPE_LENGTH (type) = value_as_long (temp);
    }

  fields = NULL;
  nfields--;			/* First set up dummy "class" field. */
  SET_FIELD_PHYSADDR (TYPE_FIELD (type, nfields),
		      VALUE_ADDRESS (clas) + VALUE_OFFSET (clas));
  TYPE_FIELD_NAME (type, nfields) = "class";
  TYPE_FIELD_TYPE (type, nfields) = VALUE_TYPE (clas);
  SET_TYPE_FIELD_PRIVATE (type, nfields);

  for (i = TYPE_N_BASECLASSES (type); i < nfields; i++)
    {
      int accflags;
      int boffset;
      if (fields == NULL)
	{
	  temp = clas;
	  fields = value_struct_elt (&temp, NULL, "fields", NULL, "structure");
	  field = value_ind (fields);
	}
      else
	{			/* Re-use field value for next field. */
	  VALUE_ADDRESS (field) += TYPE_LENGTH (VALUE_TYPE (field));
	  VALUE_LAZY (field) = 1;
	}
      temp = field;
      temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
      TYPE_FIELD_NAME (type, i) =
	get_java_utf8_name (&objfile->type_obstack, temp);
      temp = field;
      accflags = value_as_long (value_struct_elt (&temp, NULL, "accflags",
						  NULL, "structure"));
      temp = field;
      temp = value_struct_elt (&temp, NULL, "info", NULL, "structure");
      boffset = value_as_long (value_struct_elt (&temp, NULL, "boffset",
						 NULL, "structure"));
      if (accflags & 0x0001)	/* public access */
	{
	  /* ??? */
	}
      if (accflags & 0x0002)	/* private access */
	{
	  SET_TYPE_FIELD_PRIVATE (type, i);
	}
      if (accflags & 0x0004)	/* protected access */
	{
	  SET_TYPE_FIELD_PROTECTED (type, i);
	}
      if (accflags & 0x0008)	/* ACC_STATIC */
	SET_FIELD_PHYSADDR (TYPE_FIELD (type, i), boffset);
      else
	TYPE_FIELD_BITPOS (type, i) = 8 * boffset;
      if (accflags & 0x8000)	/* FIELD_UNRESOLVED_FLAG */
	{
	  TYPE_FIELD_TYPE (type, i) = get_java_object_type ();	/* FIXME */
	}
      else
	{
	  struct type *ftype;
	  temp = field;
	  temp = value_struct_elt (&temp, NULL, "type", NULL, "structure");
	  ftype = type_from_class (temp);
	  if (TYPE_CODE (ftype) == TYPE_CODE_STRUCT)
	    ftype = lookup_pointer_type (ftype);
	  TYPE_FIELD_TYPE (type, i) = ftype;
	}
    }

  temp = clas;
  nmethods = value_as_long (value_struct_elt (&temp, NULL, "method_count",
					      NULL, "structure"));
  TYPE_NFN_FIELDS_TOTAL (type) = nmethods;
  j = nmethods * sizeof (struct fn_field);
  fn_fields = (struct fn_field *)
    obstack_alloc (&dynamics_objfile->symbol_obstack, j);
  memset (fn_fields, 0, j);
  fn_fieldlists = (struct fn_fieldlist *)
    alloca (nmethods * sizeof (struct fn_fieldlist));

  methods = NULL;
  for (i = 0; i < nmethods; i++)
    {
      char *mname;
      int k;
      if (methods == NULL)
	{
	  temp = clas;
	  methods = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
	  method = value_ind (methods);
	}
      else
	{			/* Re-use method value for next method. */
	  VALUE_ADDRESS (method) += TYPE_LENGTH (VALUE_TYPE (method));
	  VALUE_LAZY (method) = 1;
	}

      /* Get method name. */
      temp = method;
      temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
      mname = get_java_utf8_name (&objfile->type_obstack, temp);
      if (strcmp (mname, "<init>") == 0)
	mname = unqualified_name;

      /* Check for an existing method with the same name.
       * This makes building the fn_fieldslists an O(nmethods**2)
       * operation.  That could be using hashing, but I doubt it
       * is worth it.  Note that we do maintain the order of methods
       * in the inferior's Method table (as long as that is grouped
       * by method name), which I think is desirable.  --PB */
      for (k = 0, j = TYPE_NFN_FIELDS (type);;)
	{
	  if (--j < 0)
	    {			/* No match - new method name. */
	      j = TYPE_NFN_FIELDS (type)++;
	      fn_fieldlists[j].name = mname;
	      fn_fieldlists[j].length = 1;
	      fn_fieldlists[j].fn_fields = &fn_fields[i];
	      k = i;
	      break;
	    }
	  if (strcmp (mname, fn_fieldlists[j].name) == 0)
	    {			/* Found an existing method with the same name. */
	      int l;
	      if (mname != unqualified_name)
		obstack_free (&objfile->type_obstack, mname);
	      mname = fn_fieldlists[j].name;
	      fn_fieldlists[j].length++;
	      k = i - k;	/* Index of new slot. */
	      /* Shift intervening fn_fields (between k and i) down. */
	      for (l = i; l > k; l--)
		fn_fields[l] = fn_fields[l - 1];
	      for (l = TYPE_NFN_FIELDS (type); --l > j;)
		fn_fieldlists[l].fn_fields++;
	      break;
	    }
	  k += fn_fieldlists[j].length;
	}
      fn_fields[k].physname = "";
      fn_fields[k].is_stub = 1;
      fn_fields[k].type = make_function_type (java_void_type, NULL);	/* FIXME */
      TYPE_CODE (fn_fields[k].type) = TYPE_CODE_METHOD;
    }

  j = TYPE_NFN_FIELDS (type) * sizeof (struct fn_fieldlist);
  TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
    obstack_alloc (&dynamics_objfile->symbol_obstack, j);
  memcpy (TYPE_FN_FIELDLISTS (type), fn_fieldlists, j);

  return type;
}

static struct type *java_object_type;

struct type *
get_java_object_type (void)
{
  if (java_object_type == NULL)
    {
      struct symbol *sym;
      sym = lookup_symbol ("java.lang.Object", NULL, STRUCT_NAMESPACE,
			   (int *) 0, (struct symtab **) NULL);
      if (sym == NULL)
	error ("cannot find java.lang.Object");
      java_object_type = SYMBOL_TYPE (sym);
    }
  return java_object_type;
}

int
get_java_object_header_size (void)
{
  struct type *objtype = get_java_object_type ();
  if (objtype == NULL)
    return (2 * TARGET_PTR_BIT / TARGET_CHAR_BIT);
  else
    return TYPE_LENGTH (objtype);
}

int
is_object_type (struct type *type)
{
  CHECK_TYPEDEF (type);
  if (TYPE_CODE (type) == TYPE_CODE_PTR)
    {
      struct type *ttype = check_typedef (TYPE_TARGET_TYPE (type));
      char *name;
      if (TYPE_CODE (ttype) != TYPE_CODE_STRUCT)
	return 0;
      while (TYPE_N_BASECLASSES (ttype) > 0)
	ttype = TYPE_BASECLASS (ttype, 0);
      name = TYPE_TAG_NAME (ttype);
      if (name != NULL && strcmp (name, "java.lang.Object") == 0)
	return 1;
      name = TYPE_NFIELDS (ttype) > 0 ? TYPE_FIELD_NAME (ttype, 0) : (char *) 0;
      if (name != NULL && strcmp (name, "vtable") == 0)
	{
	  if (java_object_type == NULL)
	    java_object_type = type;
	  return 1;
	}
    }
  return 0;
}

struct type *
java_primitive_type (int signature)
{
  switch (signature)
    {
    case 'B':
      return java_byte_type;
    case 'S':
      return java_short_type;
    case 'I':
      return java_int_type;
    case 'J':
      return java_long_type;
    case 'Z':
      return java_boolean_type;
    case 'C':
      return java_char_type;
    case 'F':
      return java_float_type;
    case 'D':
      return java_double_type;
    case 'V':
      return java_void_type;
    }
  error ("unknown signature '%c' for primitive type", (char) signature);
}

/* If name[0 .. namelen-1] is the name of a primitive Java type,
   return that type.  Otherwise, return NULL. */

struct type *
java_primitive_type_from_name (char *name, int namelen)
{
  switch (name[0])
    {
    case 'b':
      if (namelen == 4 && memcmp (name, "byte", 4) == 0)
	return java_byte_type;
      if (namelen == 7 && memcmp (name, "boolean", 7) == 0)
	return java_boolean_type;
      break;
    case 'c':
      if (namelen == 4 && memcmp (name, "char", 4) == 0)
	return java_char_type;
    case 'd':
      if (namelen == 6 && memcmp (name, "double", 6) == 0)
	return java_double_type;
      break;
    case 'f':
      if (namelen == 5 && memcmp (name, "float", 5) == 0)
	return java_float_type;
      break;
    case 'i':
      if (namelen == 3 && memcmp (name, "int", 3) == 0)
	return java_int_type;
      break;
    case 'l':
      if (namelen == 4 && memcmp (name, "long", 4) == 0)
	return java_long_type;
      break;
    case 's':
      if (namelen == 5 && memcmp (name, "short", 5) == 0)
	return java_short_type;
      break;
    case 'v':
      if (namelen == 4 && memcmp (name, "void", 4) == 0)
	return java_void_type;
      break;
    }
  return NULL;
}

/* Return the length (in bytes) of demangled name of the Java type
   signature string SIGNATURE. */

static int
java_demangled_signature_length (char *signature)
{
  int array = 0;
  for (; *signature == '['; signature++)
    array += 2;			/* Two chars for "[]". */
  switch (signature[0])
    {
    case 'L':
      /* Subtract 2 for 'L' and ';'. */
      return strlen (signature) - 2 + array;
    default:
      return strlen (TYPE_NAME (java_primitive_type (signature[0]))) + array;
    }
}

/* Demangle the Java type signature SIGNATURE, leaving the result in RESULT. */

static void
java_demangled_signature_copy (char *result, char *signature)
{
  int array = 0;
  char *ptr;
  int i;
  while (*signature == '[')
    {
      array++;
      signature++;
    }
  switch (signature[0])
    {
    case 'L':
      /* Subtract 2 for 'L' and ';', but add 1 for final nul. */
      signature++;
      ptr = result;
      for (; *signature != ';' && *signature != '\0'; signature++)
	{
	  if (*signature == '/')
	    *ptr++ = '.';
	  else
	    *ptr++ = *signature;
	}
      break;
    default:
      ptr = TYPE_NAME (java_primitive_type (signature[0]));
      i = strlen (ptr);
      strcpy (result, ptr);
      ptr = result + i;
      break;
    }
  while (--array >= 0)
    {
      *ptr++ = '[';
      *ptr++ = ']';
    }
}

/* Return the demangled name of the Java type signature string SIGNATURE,
   as a freshly allocated copy. */

char *
java_demangle_type_signature (char *signature)
{
  int length = java_demangled_signature_length (signature);
  char *result = xmalloc (length + 1);
  java_demangled_signature_copy (result, signature);
  result[length] = '\0';
  return result;
}

struct type *
java_lookup_type (char *signature)
{
  switch (signature[0])
    {
    case 'L':
    case '[':
      error ("java_lookup_type not fully implemented");
    default:
      return java_primitive_type (signature[0]);
    }
}

/* Return the type of TYPE followed by DIMS pairs of [ ].
   If DIMS == 0, TYPE is returned. */

struct type *
java_array_type (struct type *type, int dims)
{
  struct type *range_type;

  while (dims-- > 0)
    {
      range_type = create_range_type (NULL, builtin_type_int, 0, 0);
      /* FIXME  This is bogus!  Java arrays are not gdb arrays! */
      type = create_array_type (NULL, type, range_type);
    }

  return type;
}

/* Create a Java string in the inferior from a (Utf8) literal. */

static struct value *
java_value_string (char *ptr, int len)
{
  error ("not implemented - java_value_string");	/* FIXME */
}

/* Print the character C on STREAM as part of the contents of a literal
   string whose delimiter is QUOTER.  Note that that format for printing
   characters and strings is language specific. */

static void
java_emit_char (int c, struct ui_file *stream, int quoter)
{
  switch (c)
    {
    case '\\':
    case '\'':
      fprintf_filtered (stream, "\\%c", c);
      break;
    case '\b':
      fputs_filtered ("\\b", stream);
      break;
    case '\t':
      fputs_filtered ("\\t", stream);
      break;
    case '\n':
      fputs_filtered ("\\n", stream);
      break;
    case '\f':
      fputs_filtered ("\\f", stream);
      break;
    case '\r':
      fputs_filtered ("\\r", stream);
      break;
    default:
      if (isprint (c))
	fputc_filtered (c, stream);
      else
	fprintf_filtered (stream, "\\u%.4x", (unsigned int) c);
      break;
    }
}

static struct value *
evaluate_subexp_java (struct type *expect_type, register struct expression *exp,
		      register int *pos, enum noside noside)
{
  int pc = *pos;
  int i;
  char *name;
  enum exp_opcode op = exp->elts[*pos].opcode;
  struct value *arg1;
  struct value *arg2;
  struct type *type;
  switch (op)
    {
    case UNOP_IND:
      if (noside == EVAL_SKIP)
	goto standard;
      (*pos)++;
      arg1 = evaluate_subexp_java (NULL_TYPE, exp, pos, EVAL_NORMAL);
      if (is_object_type (VALUE_TYPE (arg1)))
	{
	  struct type *type;

	  type = type_from_class (java_class_from_object (arg1));
	  arg1 = value_cast (lookup_pointer_type (type), arg1);
	}
      if (noside == EVAL_SKIP)
	goto nosideret;
      return value_ind (arg1);

    case BINOP_SUBSCRIPT:
      (*pos)++;
      arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
      arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
      if (noside == EVAL_SKIP)
	goto nosideret;
      /* If the user attempts to subscript something that is not an
         array or pointer type (like a plain int variable for example),
         then report this as an error. */

      COERCE_REF (arg1);
      type = check_typedef (VALUE_TYPE (arg1));
      if (TYPE_CODE (type) == TYPE_CODE_PTR)
	type = check_typedef (TYPE_TARGET_TYPE (type));
      name = TYPE_NAME (type);
      if (name == NULL)
	name = TYPE_TAG_NAME (type);
      i = name == NULL ? 0 : strlen (name);
      if (TYPE_CODE (type) == TYPE_CODE_STRUCT
	  && i > 2 && name[i - 1] == ']')
	{
	  CORE_ADDR address;
	  long length, index;
	  struct type *el_type;
	  char buf4[4];

	  struct value *clas = java_class_from_object (arg1);
	  struct value *temp = clas;
	  /* Get CLASS_ELEMENT_TYPE of the array type. */
	  temp = value_struct_elt (&temp, NULL, "methods",
				   NULL, "structure");
	  VALUE_TYPE (temp) = VALUE_TYPE (clas);
	  el_type = type_from_class (temp);
	  if (TYPE_CODE (el_type) == TYPE_CODE_STRUCT)
	    el_type = lookup_pointer_type (el_type);

	  if (noside == EVAL_AVOID_SIDE_EFFECTS)
	    return value_zero (el_type, VALUE_LVAL (arg1));
	  address = value_as_address (arg1);
	  address += JAVA_OBJECT_SIZE;
	  read_memory (address, buf4, 4);
	  length = (long) extract_signed_integer (buf4, 4);
	  index = (long) value_as_long (arg2);
	  if (index >= length || index < 0)
	    error ("array index (%ld) out of bounds (length: %ld)",
		   index, length);
	  address = (address + 4) + index * TYPE_LENGTH (el_type);
	  return value_at (el_type, address, NULL);
	}
      else if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
	{
	  if (noside == EVAL_AVOID_SIDE_EFFECTS)
	    return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
	  else
	    return value_subscript (arg1, arg2);
	}
      if (name)
	error ("cannot subscript something of type `%s'", name);
      else
	error ("cannot subscript requested type");

    case OP_STRING:
      (*pos)++;
      i = longest_to_int (exp->elts[pc + 1].longconst);
      (*pos) += 3 + BYTES_TO_EXP_ELEM (i + 1);
      if (noside == EVAL_SKIP)
	goto nosideret;
      return java_value_string (&exp->elts[pc + 2].string, i);

    case STRUCTOP_STRUCT:
      arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
      /* Convert object field (such as TYPE.class) to reference. */
      if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_STRUCT)
	arg1 = value_addr (arg1);
      return arg1;
    default:
      break;
    }
standard:
  return evaluate_subexp_standard (expect_type, exp, pos, noside);
nosideret:
  return value_from_longest (builtin_type_long, (LONGEST) 1);
}

static struct type *
java_create_fundamental_type (struct objfile *objfile, int typeid)
{
  switch (typeid)
    {
    case FT_VOID:
      return java_void_type;
    case FT_BOOLEAN:
      return java_boolean_type;
    case FT_CHAR:
      return java_char_type;
    case FT_FLOAT:
      return java_float_type;
    case FT_DBL_PREC_FLOAT:
      return java_double_type;
    case FT_BYTE:
    case FT_SIGNED_CHAR:
      return java_byte_type;
    case FT_SHORT:
    case FT_SIGNED_SHORT:
      return java_short_type;
    case FT_INTEGER:
    case FT_SIGNED_INTEGER:
      return java_int_type;
    case FT_LONG:
    case FT_SIGNED_LONG:
      return java_long_type;
    }
  return c_create_fundamental_type (objfile, typeid);
}

/* Table mapping opcodes into strings for printing operators
   and precedences of the operators.  */

const struct op_print java_op_print_tab[] =
{
  {",", BINOP_COMMA, PREC_COMMA, 0},
  {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
  {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
  {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
  {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
  {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
  {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
  {"==", BINOP_EQUAL, PREC_EQUAL, 0},
  {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
  {"<=", BINOP_LEQ, PREC_ORDER, 0},
  {">=", BINOP_GEQ, PREC_ORDER, 0},
  {">", BINOP_GTR, PREC_ORDER, 0},
  {"<", BINOP_LESS, PREC_ORDER, 0},
  {">>", BINOP_RSH, PREC_SHIFT, 0},
  {"<<", BINOP_LSH, PREC_SHIFT, 0},
#if 0
  {">>>", BINOP_ ? ? ?, PREC_SHIFT, 0},
#endif
  {"+", BINOP_ADD, PREC_ADD, 0},
  {"-", BINOP_SUB, PREC_ADD, 0},
  {"*", BINOP_MUL, PREC_MUL, 0},
  {"/", BINOP_DIV, PREC_MUL, 0},
  {"%", BINOP_REM, PREC_MUL, 0},
  {"-", UNOP_NEG, PREC_PREFIX, 0},
  {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
  {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
  {"*", UNOP_IND, PREC_PREFIX, 0},
#if 0
  {"instanceof", ? ? ?, ? ? ?, 0},
#endif
  {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
  {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
  {NULL, 0, 0, 0}
};

const struct language_defn java_language_defn =
{
  "java",			/* Language name */
  language_java,
  c_builtin_types,
  range_check_off,
  type_check_off,
  case_sensitive_on,
  java_parse,
  java_error,
  evaluate_subexp_java,
  c_printchar,			/* Print a character constant */
  c_printstr,			/* Function to print string constant */
  java_emit_char,		/* Function to print a single character */
  java_create_fundamental_type,	/* Create fundamental type in this language */
  java_print_type,		/* Print a type using appropriate syntax */
  java_val_print,		/* Print a value using appropriate syntax */
  java_value_print,		/* Print a top-level value */
  {"", "", "", ""},		/* Binary format info */
  {"0%lo", "0", "o", ""},	/* Octal format info */
  {"%ld", "", "d", ""},		/* Decimal format info */
  {"0x%lx", "0x", "x", ""},	/* Hex format info */
  java_op_print_tab,		/* expression operators for printing */
  0,				/* not c-style arrays */
  0,				/* String lower bound */
  &builtin_type_char,		/* Type of string elements */
  LANG_MAGIC
};

void
_initialize_java_language (void)
{

  java_int_type = init_type (TYPE_CODE_INT, 4, 0, "int", NULL);
  java_short_type = init_type (TYPE_CODE_INT, 2, 0, "short", NULL);
  java_long_type = init_type (TYPE_CODE_INT, 8, 0, "long", NULL);
  java_byte_type = init_type (TYPE_CODE_INT, 1, 0, "byte", NULL);
  java_boolean_type = init_type (TYPE_CODE_BOOL, 1, 0, "boolean", NULL);
  java_char_type = init_type (TYPE_CODE_CHAR, 2, TYPE_FLAG_UNSIGNED, "char", NULL);
  java_float_type = init_type (TYPE_CODE_FLT, 4, 0, "float", NULL);
  java_double_type = init_type (TYPE_CODE_FLT, 8, 0, "double", NULL);
  java_void_type = init_type (TYPE_CODE_VOID, 1, 0, "void", NULL);

  add_language (&java_language_defn);
}

/* Cleanup code that should be run on every "run".
   We should use make_run_cleanup to have this be called.
   But will that mess up values in value histry?  FIXME */

extern void java_rerun_cleanup (void);
void
java_rerun_cleanup (void)
{
  if (class_symtab != NULL)
    {
      free_symtab (class_symtab);	/* ??? */
      class_symtab = NULL;
    }
  if (dynamics_objfile != NULL)
    {
      free_objfile (dynamics_objfile);
      dynamics_objfile = NULL;
    }

  java_object_type = NULL;
}