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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-6.8/] [gdb/] [jv-lang.c] - Blame information for rev 816

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1 24 jeremybenn
/* Java language support routines for GDB, the GNU debugger.
2
 
3
   Copyright (C) 1997, 1998, 1999, 2000, 2003, 2004, 2005, 2007, 2008
4
   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 "parser-defs.h"
26
#include "language.h"
27
#include "gdbtypes.h"
28
#include "symtab.h"
29
#include "symfile.h"
30
#include "objfiles.h"
31
#include "gdb_string.h"
32
#include "value.h"
33
#include "c-lang.h"
34
#include "jv-lang.h"
35
#include "gdbcore.h"
36
#include "block.h"
37
#include "demangle.h"
38
#include "dictionary.h"
39
#include <ctype.h>
40
#include "gdb_assert.h"
41
 
42
struct type *java_int_type;
43
struct type *java_byte_type;
44
struct type *java_short_type;
45
struct type *java_long_type;
46
struct type *java_boolean_type;
47
struct type *java_char_type;
48
struct type *java_float_type;
49
struct type *java_double_type;
50
struct type *java_void_type;
51
 
52
/* Local functions */
53
 
54
extern void _initialize_java_language (void);
55
 
56
static int java_demangled_signature_length (char *);
57
static void java_demangled_signature_copy (char *, char *);
58
 
59
static struct symtab *get_java_class_symtab (void);
60
static char *get_java_utf8_name (struct obstack *obstack, struct value *name);
61
static int java_class_is_primitive (struct value *clas);
62
static struct value *java_value_string (char *ptr, int len);
63
 
64
static void java_emit_char (int c, struct ui_file * stream, int quoter);
65
 
66
static char *java_class_name_from_physname (const char *physname);
67
 
68
/* This objfile contains symtabs that have been dynamically created
69
   to record dynamically loaded Java classes and dynamically
70
   compiled java methods. */
71
 
72
static struct objfile *dynamics_objfile = NULL;
73
 
74
static struct type *java_link_class_type (struct type *, struct value *);
75
 
76
/* FIXME: carlton/2003-02-04: This is the main or only caller of
77
   allocate_objfile with first argument NULL; as a result, this code
78
   breaks every so often.  Somebody should write a test case that
79
   exercises GDB in various ways (e.g. something involving loading a
80
   dynamic library) after this code has been called.  */
81
 
82
static struct objfile *
83
get_dynamics_objfile (void)
84
{
85
  if (dynamics_objfile == NULL)
86
    {
87
      dynamics_objfile = allocate_objfile (NULL, 0);
88
    }
89
  return dynamics_objfile;
90
}
91
 
92
#if 1
93
/* symtab contains classes read from the inferior. */
94
 
95
static struct symtab *class_symtab = NULL;
96
 
97
static void free_class_block (struct symtab *symtab);
98
 
99
static struct symtab *
100
get_java_class_symtab (void)
101
{
102
  if (class_symtab == NULL)
103
    {
104
      struct objfile *objfile = get_dynamics_objfile ();
105
      struct blockvector *bv;
106
      struct block *bl;
107
      class_symtab = allocate_symtab ("<java-classes>", objfile);
108
      class_symtab->language = language_java;
109
      bv = (struct blockvector *)
110
        obstack_alloc (&objfile->objfile_obstack,
111
                       sizeof (struct blockvector) + sizeof (struct block *));
112
      BLOCKVECTOR_NBLOCKS (bv) = 1;
113
      BLOCKVECTOR (class_symtab) = bv;
114
 
115
      /* Allocate dummy STATIC_BLOCK. */
116
      bl = allocate_block (&objfile->objfile_obstack);
117
      BLOCK_DICT (bl) = dict_create_linear (&objfile->objfile_obstack,
118
                                            NULL);
119
      BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = bl;
120
 
121
      /* Allocate GLOBAL_BLOCK.  */
122
      bl = allocate_block (&objfile->objfile_obstack);
123
      BLOCK_DICT (bl) = dict_create_hashed_expandable ();
124
      BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
125
      class_symtab->free_func = free_class_block;
126
    }
127
  return class_symtab;
128
}
129
 
130
static void
131
add_class_symtab_symbol (struct symbol *sym)
132
{
133
  struct symtab *symtab = get_java_class_symtab ();
134
  struct blockvector *bv = BLOCKVECTOR (symtab);
135
  dict_add_symbol (BLOCK_DICT (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)), sym);
136
}
137
 
138
static struct symbol *add_class_symbol (struct type *type, CORE_ADDR addr);
139
 
140
static struct symbol *
141
add_class_symbol (struct type *type, CORE_ADDR addr)
142
{
143
  struct symbol *sym;
144
  sym = (struct symbol *)
145
    obstack_alloc (&dynamics_objfile->objfile_obstack, sizeof (struct symbol));
146
  memset (sym, 0, sizeof (struct symbol));
147
  SYMBOL_LANGUAGE (sym) = language_java;
148
  DEPRECATED_SYMBOL_NAME (sym) = TYPE_TAG_NAME (type);
149
  SYMBOL_CLASS (sym) = LOC_TYPEDEF;
150
  /*  SYMBOL_VALUE (sym) = valu; */
151
  SYMBOL_TYPE (sym) = type;
152
  SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
153
  SYMBOL_VALUE_ADDRESS (sym) = addr;
154
  return sym;
155
}
156
 
157
/* Free the dynamic symbols block.  */
158
static void
159
free_class_block (struct symtab *symtab)
160
{
161
  struct blockvector *bv = BLOCKVECTOR (symtab);
162
  struct block *bl = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
163
 
164
  dict_free (BLOCK_DICT (bl));
165
}
166
#endif
167
 
168
struct type *
169
java_lookup_class (char *name)
170
{
171
  struct symbol *sym;
172
  sym = lookup_symbol (name, expression_context_block, STRUCT_DOMAIN,
173
                       (int *) 0, (struct symtab **) NULL);
174
  if (sym != NULL)
175
    return SYMBOL_TYPE (sym);
176
#if 0
177
  CORE_ADDR addr;
178
  if (called from parser)
179
    {
180
      call lookup_class (or similar) in inferior;
181
      if not
182
      found:
183
        return NULL;
184
      addr = found in inferior;
185
    }
186
  else
187
    addr = 0;
188
  struct type *type;
189
  type = alloc_type (objfile);
190
  TYPE_CODE (type) = TYPE_CODE_STRUCT;
191
  INIT_CPLUS_SPECIFIC (type);
192
  TYPE_TAG_NAME (type) = obsavestring (name, strlen (name), &objfile->objfile_obstack);
193
  TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
194
  TYPE ? = addr;
195
  return type;
196
#else
197
  /* FIXME - should search inferior's symbol table. */
198
  return NULL;
199
#endif
200
}
201
 
202
/* Return a nul-terminated string (allocated on OBSTACK) for
203
   a name given by NAME (which has type Utf8Const*). */
204
 
205
char *
206
get_java_utf8_name (struct obstack *obstack, struct value *name)
207
{
208
  char *chrs;
209
  struct value *temp = name;
210
  int name_length;
211
  CORE_ADDR data_addr;
212
  temp = value_struct_elt (&temp, NULL, "length", NULL, "structure");
213
  name_length = (int) value_as_long (temp);
214
  data_addr = VALUE_ADDRESS (temp) + value_offset (temp)
215
    + TYPE_LENGTH (value_type (temp));
216
  chrs = obstack_alloc (obstack, name_length + 1);
217
  chrs[name_length] = '\0';
218
  read_memory (data_addr, (gdb_byte *) chrs, name_length);
219
  return chrs;
220
}
221
 
222
struct value *
223
java_class_from_object (struct value *obj_val)
224
{
225
  /* This is all rather inefficient, since the offsets of vtable and
226
     class are fixed.  FIXME */
227
  struct value *vtable_val;
228
 
229
  if (TYPE_CODE (value_type (obj_val)) == TYPE_CODE_PTR
230
      && TYPE_LENGTH (TYPE_TARGET_TYPE (value_type (obj_val))) == 0)
231
    obj_val = value_at (get_java_object_type (),
232
                        value_as_address (obj_val));
233
 
234
  vtable_val = value_struct_elt (&obj_val, NULL, "vtable", NULL, "structure");
235
  return value_struct_elt (&vtable_val, NULL, "class", NULL, "structure");
236
}
237
 
238
/* Check if CLASS_IS_PRIMITIVE(value of clas): */
239
static int
240
java_class_is_primitive (struct value *clas)
241
{
242
  struct value *vtable = value_struct_elt (&clas, NULL, "vtable", NULL, "struct");
243
  CORE_ADDR i = value_as_address (vtable);
244
  return (int) (i & 0x7fffffff) == (int) 0x7fffffff;
245
}
246
 
247
/* Read a GCJ Class object, and generated a gdb (TYPE_CODE_STRUCT) type. */
248
 
249
struct type *
250
type_from_class (struct value *clas)
251
{
252
  struct type *type;
253
  char *name;
254
  struct value *temp;
255
  struct objfile *objfile;
256
  struct value *utf8_name;
257
  char *nptr;
258
  CORE_ADDR addr;
259
  struct block *bl;
260
  struct dict_iterator iter;
261
  int is_array = 0;
262
 
263
  type = check_typedef (value_type (clas));
264
  if (TYPE_CODE (type) == TYPE_CODE_PTR)
265
    {
266
      if (value_logical_not (clas))
267
        return NULL;
268
      clas = value_ind (clas);
269
    }
270
  addr = VALUE_ADDRESS (clas) + value_offset (clas);
271
 
272
#if 0
273
  get_java_class_symtab ();
274
  bl = BLOCKVECTOR_BLOCK (BLOCKVECTOR (class_symtab), GLOBAL_BLOCK);
275
  ALL_BLOCK_SYMBOLS (block, iter, sym)
276
    {
277
      if (SYMBOL_VALUE_ADDRESS (sym) == addr)
278
        return SYMBOL_TYPE (sym);
279
    }
280
#endif
281
 
282
  objfile = get_dynamics_objfile ();
283
  if (java_class_is_primitive (clas))
284
    {
285
      struct value *sig;
286
      temp = clas;
287
      sig = value_struct_elt (&temp, NULL, "method_count", NULL, "structure");
288
      return java_primitive_type (value_as_long (sig));
289
    }
290
 
291
  /* Get Class name. */
292
  /* if clasloader non-null, prepend loader address. FIXME */
293
  temp = clas;
294
  utf8_name = value_struct_elt (&temp, NULL, "name", NULL, "structure");
295
  name = get_java_utf8_name (&objfile->objfile_obstack, utf8_name);
296
  for (nptr = name; *nptr != 0; nptr++)
297
    {
298
      if (*nptr == '/')
299
        *nptr = '.';
300
    }
301
 
302
  type = java_lookup_class (name);
303
  if (type != NULL)
304
    return type;
305
 
306
  type = alloc_type (objfile);
307
  TYPE_CODE (type) = TYPE_CODE_STRUCT;
308
  INIT_CPLUS_SPECIFIC (type);
309
 
310
  if (name[0] == '[')
311
    {
312
      char *signature = name;
313
      int namelen = java_demangled_signature_length (signature);
314
      if (namelen > strlen (name))
315
        name = obstack_alloc (&objfile->objfile_obstack, namelen + 1);
316
      java_demangled_signature_copy (name, signature);
317
      name[namelen] = '\0';
318
      is_array = 1;
319
      temp = clas;
320
      /* Set array element type. */
321
      temp = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
322
      deprecated_set_value_type (temp, lookup_pointer_type (value_type (clas)));
323
      TYPE_TARGET_TYPE (type) = type_from_class (temp);
324
    }
325
 
326
  ALLOCATE_CPLUS_STRUCT_TYPE (type);
327
  TYPE_TAG_NAME (type) = name;
328
 
329
  add_class_symtab_symbol (add_class_symbol (type, addr));
330
  return java_link_class_type (type, clas);
331
}
332
 
333
/* Fill in class TYPE with data from the CLAS value. */
334
 
335
struct type *
336
java_link_class_type (struct type *type, struct value *clas)
337
{
338
  struct value *temp;
339
  char *unqualified_name;
340
  char *name = TYPE_TAG_NAME (type);
341
  int ninterfaces, nfields, nmethods;
342
  int type_is_object = 0;
343
  struct fn_field *fn_fields;
344
  struct fn_fieldlist *fn_fieldlists;
345
  struct value *fields;
346
  struct value *methods;
347
  struct value *method = NULL;
348
  struct value *field = NULL;
349
  int i, j;
350
  struct objfile *objfile = get_dynamics_objfile ();
351
  struct type *tsuper;
352
 
353
  gdb_assert (name != NULL);
354
  unqualified_name = strrchr (name, '.');
355
  if (unqualified_name == NULL)
356
    unqualified_name = name;
357
 
358
  temp = clas;
359
  temp = value_struct_elt (&temp, NULL, "superclass", NULL, "structure");
360
  if (strcmp (name, "java.lang.Object") == 0)
361
    {
362
      tsuper = get_java_object_type ();
363
      if (tsuper && TYPE_CODE (tsuper) == TYPE_CODE_PTR)
364
        tsuper = TYPE_TARGET_TYPE (tsuper);
365
      type_is_object = 1;
366
    }
367
  else
368
    tsuper = type_from_class (temp);
369
 
370
#if 1
371
  ninterfaces = 0;
372
#else
373
  temp = clas;
374
  ninterfaces = value_as_long (value_struct_elt (&temp, NULL, "interface_len", NULL, "structure"));
375
#endif
376
  TYPE_N_BASECLASSES (type) = (tsuper == NULL ? 0 : 1) + ninterfaces;
377
  temp = clas;
378
  nfields = value_as_long (value_struct_elt (&temp, NULL, "field_count", NULL, "structure"));
379
  nfields += TYPE_N_BASECLASSES (type);
380
  nfields++;                    /* Add one for dummy "class" field. */
381
  TYPE_NFIELDS (type) = nfields;
382
  TYPE_FIELDS (type) = (struct field *)
383
    TYPE_ALLOC (type, sizeof (struct field) * nfields);
384
 
385
  memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
386
 
387
  TYPE_FIELD_PRIVATE_BITS (type) =
388
    (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
389
  B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
390
 
391
  TYPE_FIELD_PROTECTED_BITS (type) =
392
    (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
393
  B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
394
 
395
  TYPE_FIELD_IGNORE_BITS (type) =
396
    (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
397
  B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
398
 
399
  TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
400
    TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
401
  B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
402
 
403
  if (tsuper != NULL)
404
    {
405
      TYPE_BASECLASS (type, 0) = tsuper;
406
      if (type_is_object)
407
        SET_TYPE_FIELD_PRIVATE (type, 0);
408
    }
409
 
410
  i = strlen (name);
411
  if (i > 2 && name[i - 1] == ']' && tsuper != NULL)
412
    {
413
      /* FIXME */
414
      TYPE_LENGTH (type) = TYPE_LENGTH (tsuper) + 4;    /* size with "length" */
415
    }
416
  else
417
    {
418
      temp = clas;
419
      temp = value_struct_elt (&temp, NULL, "size_in_bytes", NULL, "structure");
420
      TYPE_LENGTH (type) = value_as_long (temp);
421
    }
422
 
423
  fields = NULL;
424
  nfields--;                    /* First set up dummy "class" field. */
425
  SET_FIELD_PHYSADDR (TYPE_FIELD (type, nfields),
426
                      VALUE_ADDRESS (clas) + value_offset (clas));
427
  TYPE_FIELD_NAME (type, nfields) = "class";
428
  TYPE_FIELD_TYPE (type, nfields) = value_type (clas);
429
  SET_TYPE_FIELD_PRIVATE (type, nfields);
430
 
431
  for (i = TYPE_N_BASECLASSES (type); i < nfields; i++)
432
    {
433
      int accflags;
434
      int boffset;
435
      if (fields == NULL)
436
        {
437
          temp = clas;
438
          fields = value_struct_elt (&temp, NULL, "fields", NULL, "structure");
439
          field = value_ind (fields);
440
        }
441
      else
442
        {                       /* Re-use field value for next field. */
443
          VALUE_ADDRESS (field) += TYPE_LENGTH (value_type (field));
444
          set_value_lazy (field, 1);
445
        }
446
      temp = field;
447
      temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
448
      TYPE_FIELD_NAME (type, i) =
449
        get_java_utf8_name (&objfile->objfile_obstack, temp);
450
      temp = field;
451
      accflags = value_as_long (value_struct_elt (&temp, NULL, "accflags",
452
                                                  NULL, "structure"));
453
      temp = field;
454
      temp = value_struct_elt (&temp, NULL, "info", NULL, "structure");
455
      boffset = value_as_long (value_struct_elt (&temp, NULL, "boffset",
456
                                                 NULL, "structure"));
457
      if (accflags & 0x0001)    /* public access */
458
        {
459
          /* ??? */
460
        }
461
      if (accflags & 0x0002)    /* private access */
462
        {
463
          SET_TYPE_FIELD_PRIVATE (type, i);
464
        }
465
      if (accflags & 0x0004)    /* protected access */
466
        {
467
          SET_TYPE_FIELD_PROTECTED (type, i);
468
        }
469
      if (accflags & 0x0008)    /* ACC_STATIC */
470
        SET_FIELD_PHYSADDR (TYPE_FIELD (type, i), boffset);
471
      else
472
        TYPE_FIELD_BITPOS (type, i) = 8 * boffset;
473
      if (accflags & 0x8000)    /* FIELD_UNRESOLVED_FLAG */
474
        {
475
          TYPE_FIELD_TYPE (type, i) = get_java_object_type ();  /* FIXME */
476
        }
477
      else
478
        {
479
          struct type *ftype;
480
          temp = field;
481
          temp = value_struct_elt (&temp, NULL, "type", NULL, "structure");
482
          ftype = type_from_class (temp);
483
          if (TYPE_CODE (ftype) == TYPE_CODE_STRUCT)
484
            ftype = lookup_pointer_type (ftype);
485
          TYPE_FIELD_TYPE (type, i) = ftype;
486
        }
487
    }
488
 
489
  temp = clas;
490
  nmethods = value_as_long (value_struct_elt (&temp, NULL, "method_count",
491
                                              NULL, "structure"));
492
  TYPE_NFN_FIELDS_TOTAL (type) = nmethods;
493
  j = nmethods * sizeof (struct fn_field);
494
  fn_fields = (struct fn_field *)
495
    obstack_alloc (&dynamics_objfile->objfile_obstack, j);
496
  memset (fn_fields, 0, j);
497
  fn_fieldlists = (struct fn_fieldlist *)
498
    alloca (nmethods * sizeof (struct fn_fieldlist));
499
 
500
  methods = NULL;
501
  for (i = 0; i < nmethods; i++)
502
    {
503
      char *mname;
504
      int k;
505
      if (methods == NULL)
506
        {
507
          temp = clas;
508
          methods = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
509
          method = value_ind (methods);
510
        }
511
      else
512
        {                       /* Re-use method value for next method. */
513
          VALUE_ADDRESS (method) += TYPE_LENGTH (value_type (method));
514
          set_value_lazy (method, 1);
515
        }
516
 
517
      /* Get method name. */
518
      temp = method;
519
      temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
520
      mname = get_java_utf8_name (&objfile->objfile_obstack, temp);
521
      if (strcmp (mname, "<init>") == 0)
522
        mname = unqualified_name;
523
 
524
      /* Check for an existing method with the same name.
525
       * This makes building the fn_fieldslists an O(nmethods**2)
526
       * operation.  That could be using hashing, but I doubt it
527
       * is worth it.  Note that we do maintain the order of methods
528
       * in the inferior's Method table (as long as that is grouped
529
       * by method name), which I think is desirable.  --PB */
530
      for (k = 0, j = TYPE_NFN_FIELDS (type);;)
531
        {
532
          if (--j < 0)
533
            {                   /* No match - new method name. */
534
              j = TYPE_NFN_FIELDS (type)++;
535
              fn_fieldlists[j].name = mname;
536
              fn_fieldlists[j].length = 1;
537
              fn_fieldlists[j].fn_fields = &fn_fields[i];
538
              k = i;
539
              break;
540
            }
541
          if (strcmp (mname, fn_fieldlists[j].name) == 0)
542
            {                   /* Found an existing method with the same name. */
543
              int l;
544
              if (mname != unqualified_name)
545
                obstack_free (&objfile->objfile_obstack, mname);
546
              mname = fn_fieldlists[j].name;
547
              fn_fieldlists[j].length++;
548
              k = i - k;        /* Index of new slot. */
549
              /* Shift intervening fn_fields (between k and i) down. */
550
              for (l = i; l > k; l--)
551
                fn_fields[l] = fn_fields[l - 1];
552
              for (l = TYPE_NFN_FIELDS (type); --l > j;)
553
                fn_fieldlists[l].fn_fields++;
554
              break;
555
            }
556
          k += fn_fieldlists[j].length;
557
        }
558
      fn_fields[k].physname = "";
559
      fn_fields[k].is_stub = 1;
560
      fn_fields[k].type = make_function_type (java_void_type, NULL);    /* FIXME */
561
      TYPE_CODE (fn_fields[k].type) = TYPE_CODE_METHOD;
562
    }
563
 
564
  j = TYPE_NFN_FIELDS (type) * sizeof (struct fn_fieldlist);
565
  TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
566
    obstack_alloc (&dynamics_objfile->objfile_obstack, j);
567
  memcpy (TYPE_FN_FIELDLISTS (type), fn_fieldlists, j);
568
 
569
  return type;
570
}
571
 
572
static struct type *java_object_type;
573
 
574
struct type *
575
get_java_object_type (void)
576
{
577
  if (java_object_type == NULL)
578
    {
579
      struct symbol *sym;
580
      sym = lookup_symbol ("java.lang.Object", NULL, STRUCT_DOMAIN,
581
                           (int *) 0, (struct symtab **) NULL);
582
      if (sym == NULL)
583
        error (_("cannot find java.lang.Object"));
584
      java_object_type = SYMBOL_TYPE (sym);
585
    }
586
  return java_object_type;
587
}
588
 
589
int
590
get_java_object_header_size (void)
591
{
592
  struct type *objtype = get_java_object_type ();
593
  if (objtype == NULL)
594
    return (2 * gdbarch_ptr_bit (current_gdbarch) / TARGET_CHAR_BIT);
595
  else
596
    return TYPE_LENGTH (objtype);
597
}
598
 
599
int
600
is_object_type (struct type *type)
601
{
602
  CHECK_TYPEDEF (type);
603
  if (TYPE_CODE (type) == TYPE_CODE_PTR)
604
    {
605
      struct type *ttype = check_typedef (TYPE_TARGET_TYPE (type));
606
      char *name;
607
      if (TYPE_CODE (ttype) != TYPE_CODE_STRUCT)
608
        return 0;
609
      while (TYPE_N_BASECLASSES (ttype) > 0)
610
        ttype = TYPE_BASECLASS (ttype, 0);
611
      name = TYPE_TAG_NAME (ttype);
612
      if (name != NULL && strcmp (name, "java.lang.Object") == 0)
613
        return 1;
614
      name = TYPE_NFIELDS (ttype) > 0 ? TYPE_FIELD_NAME (ttype, 0) : (char *) 0;
615
      if (name != NULL && strcmp (name, "vtable") == 0)
616
        {
617
          if (java_object_type == NULL)
618
            java_object_type = type;
619
          return 1;
620
        }
621
    }
622
  return 0;
623
}
624
 
625
struct type *
626
java_primitive_type (int signature)
627
{
628
  switch (signature)
629
    {
630
    case 'B':
631
      return java_byte_type;
632
    case 'S':
633
      return java_short_type;
634
    case 'I':
635
      return java_int_type;
636
    case 'J':
637
      return java_long_type;
638
    case 'Z':
639
      return java_boolean_type;
640
    case 'C':
641
      return java_char_type;
642
    case 'F':
643
      return java_float_type;
644
    case 'D':
645
      return java_double_type;
646
    case 'V':
647
      return java_void_type;
648
    }
649
  error (_("unknown signature '%c' for primitive type"), (char) signature);
650
}
651
 
652
/* If name[0 .. namelen-1] is the name of a primitive Java type,
653
   return that type.  Otherwise, return NULL. */
654
 
655
struct type *
656
java_primitive_type_from_name (char *name, int namelen)
657
{
658
  switch (name[0])
659
    {
660
    case 'b':
661
      if (namelen == 4 && memcmp (name, "byte", 4) == 0)
662
        return java_byte_type;
663
      if (namelen == 7 && memcmp (name, "boolean", 7) == 0)
664
        return java_boolean_type;
665
      break;
666
    case 'c':
667
      if (namelen == 4 && memcmp (name, "char", 4) == 0)
668
        return java_char_type;
669
    case 'd':
670
      if (namelen == 6 && memcmp (name, "double", 6) == 0)
671
        return java_double_type;
672
      break;
673
    case 'f':
674
      if (namelen == 5 && memcmp (name, "float", 5) == 0)
675
        return java_float_type;
676
      break;
677
    case 'i':
678
      if (namelen == 3 && memcmp (name, "int", 3) == 0)
679
        return java_int_type;
680
      break;
681
    case 'l':
682
      if (namelen == 4 && memcmp (name, "long", 4) == 0)
683
        return java_long_type;
684
      break;
685
    case 's':
686
      if (namelen == 5 && memcmp (name, "short", 5) == 0)
687
        return java_short_type;
688
      break;
689
    case 'v':
690
      if (namelen == 4 && memcmp (name, "void", 4) == 0)
691
        return java_void_type;
692
      break;
693
    }
694
  return NULL;
695
}
696
 
697
/* Return the length (in bytes) of demangled name of the Java type
698
   signature string SIGNATURE. */
699
 
700
static int
701
java_demangled_signature_length (char *signature)
702
{
703
  int array = 0;
704
  for (; *signature == '['; signature++)
705
    array += 2;                 /* Two chars for "[]". */
706
  switch (signature[0])
707
    {
708
    case 'L':
709
      /* Subtract 2 for 'L' and ';'. */
710
      return strlen (signature) - 2 + array;
711
    default:
712
      return strlen (TYPE_NAME (java_primitive_type (signature[0]))) + array;
713
    }
714
}
715
 
716
/* Demangle the Java type signature SIGNATURE, leaving the result in RESULT. */
717
 
718
static void
719
java_demangled_signature_copy (char *result, char *signature)
720
{
721
  int array = 0;
722
  char *ptr;
723
  int i;
724
  while (*signature == '[')
725
    {
726
      array++;
727
      signature++;
728
    }
729
  switch (signature[0])
730
    {
731
    case 'L':
732
      /* Subtract 2 for 'L' and ';', but add 1 for final nul. */
733
      signature++;
734
      ptr = result;
735
      for (; *signature != ';' && *signature != '\0'; signature++)
736
        {
737
          if (*signature == '/')
738
            *ptr++ = '.';
739
          else
740
            *ptr++ = *signature;
741
        }
742
      break;
743
    default:
744
      ptr = TYPE_NAME (java_primitive_type (signature[0]));
745
      i = strlen (ptr);
746
      strcpy (result, ptr);
747
      ptr = result + i;
748
      break;
749
    }
750
  while (--array >= 0)
751
    {
752
      *ptr++ = '[';
753
      *ptr++ = ']';
754
    }
755
}
756
 
757
/* Return the demangled name of the Java type signature string SIGNATURE,
758
   as a freshly allocated copy. */
759
 
760
char *
761
java_demangle_type_signature (char *signature)
762
{
763
  int length = java_demangled_signature_length (signature);
764
  char *result = xmalloc (length + 1);
765
  java_demangled_signature_copy (result, signature);
766
  result[length] = '\0';
767
  return result;
768
}
769
 
770
/* Return the type of TYPE followed by DIMS pairs of [ ].
771
   If DIMS == 0, TYPE is returned. */
772
 
773
struct type *
774
java_array_type (struct type *type, int dims)
775
{
776
  struct type *range_type;
777
 
778
  while (dims-- > 0)
779
    {
780
      range_type = create_range_type (NULL, builtin_type_int, 0, 0);
781
      /* FIXME  This is bogus!  Java arrays are not gdb arrays! */
782
      type = create_array_type (NULL, type, range_type);
783
    }
784
 
785
  return type;
786
}
787
 
788
/* Create a Java string in the inferior from a (Utf8) literal. */
789
 
790
static struct value *
791
java_value_string (char *ptr, int len)
792
{
793
  error (_("not implemented - java_value_string"));     /* FIXME */
794
}
795
 
796
/* Print the character C on STREAM as part of the contents of a literal
797
   string whose delimiter is QUOTER.  Note that that format for printing
798
   characters and strings is language specific. */
799
 
800
static void
801
java_emit_char (int c, struct ui_file *stream, int quoter)
802
{
803
  switch (c)
804
    {
805
    case '\\':
806
    case '\'':
807
      fprintf_filtered (stream, "\\%c", c);
808
      break;
809
    case '\b':
810
      fputs_filtered ("\\b", stream);
811
      break;
812
    case '\t':
813
      fputs_filtered ("\\t", stream);
814
      break;
815
    case '\n':
816
      fputs_filtered ("\\n", stream);
817
      break;
818
    case '\f':
819
      fputs_filtered ("\\f", stream);
820
      break;
821
    case '\r':
822
      fputs_filtered ("\\r", stream);
823
      break;
824
    default:
825
      if (isprint (c))
826
        fputc_filtered (c, stream);
827
      else
828
        fprintf_filtered (stream, "\\u%.4x", (unsigned int) c);
829
      break;
830
    }
831
}
832
 
833
static struct value *
834
evaluate_subexp_java (struct type *expect_type, struct expression *exp,
835
                      int *pos, enum noside noside)
836
{
837
  int pc = *pos;
838
  int i;
839
  char *name;
840
  enum exp_opcode op = exp->elts[*pos].opcode;
841
  struct value *arg1;
842
  struct value *arg2;
843
  struct type *type;
844
  switch (op)
845
    {
846
    case UNOP_IND:
847
      if (noside == EVAL_SKIP)
848
        goto standard;
849
      (*pos)++;
850
      arg1 = evaluate_subexp_java (NULL_TYPE, exp, pos, EVAL_NORMAL);
851
      if (is_object_type (value_type (arg1)))
852
        {
853
          struct type *type;
854
 
855
          type = type_from_class (java_class_from_object (arg1));
856
          arg1 = value_cast (lookup_pointer_type (type), arg1);
857
        }
858
      if (noside == EVAL_SKIP)
859
        goto nosideret;
860
      return value_ind (arg1);
861
 
862
    case BINOP_SUBSCRIPT:
863
      (*pos)++;
864
      arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
865
      arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
866
      if (noside == EVAL_SKIP)
867
        goto nosideret;
868
      /* If the user attempts to subscript something that is not an
869
         array or pointer type (like a plain int variable for example),
870
         then report this as an error. */
871
 
872
      arg1 = coerce_ref (arg1);
873
      type = check_typedef (value_type (arg1));
874
      if (TYPE_CODE (type) == TYPE_CODE_PTR)
875
        type = check_typedef (TYPE_TARGET_TYPE (type));
876
      name = TYPE_NAME (type);
877
      if (name == NULL)
878
        name = TYPE_TAG_NAME (type);
879
      i = name == NULL ? 0 : strlen (name);
880
      if (TYPE_CODE (type) == TYPE_CODE_STRUCT
881
          && i > 2 && name[i - 1] == ']')
882
        {
883
          CORE_ADDR address;
884
          long length, index;
885
          struct type *el_type;
886
          gdb_byte buf4[4];
887
 
888
          struct value *clas = java_class_from_object (arg1);
889
          struct value *temp = clas;
890
          /* Get CLASS_ELEMENT_TYPE of the array type. */
891
          temp = value_struct_elt (&temp, NULL, "methods",
892
                                   NULL, "structure");
893
          deprecated_set_value_type (temp, value_type (clas));
894
          el_type = type_from_class (temp);
895
          if (TYPE_CODE (el_type) == TYPE_CODE_STRUCT)
896
            el_type = lookup_pointer_type (el_type);
897
 
898
          if (noside == EVAL_AVOID_SIDE_EFFECTS)
899
            return value_zero (el_type, VALUE_LVAL (arg1));
900
          address = value_as_address (arg1);
901
          address += JAVA_OBJECT_SIZE;
902
          read_memory (address, buf4, 4);
903
          length = (long) extract_signed_integer (buf4, 4);
904
          index = (long) value_as_long (arg2);
905
          if (index >= length || index < 0)
906
            error (_("array index (%ld) out of bounds (length: %ld)"),
907
                   index, length);
908
          address = (address + 4) + index * TYPE_LENGTH (el_type);
909
          return value_at (el_type, address);
910
        }
911
      else if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
912
        {
913
          if (noside == EVAL_AVOID_SIDE_EFFECTS)
914
            return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
915
          else
916
            return value_subscript (arg1, arg2);
917
        }
918
      if (name)
919
        error (_("cannot subscript something of type `%s'"), name);
920
      else
921
        error (_("cannot subscript requested type"));
922
 
923
    case OP_STRING:
924
      (*pos)++;
925
      i = longest_to_int (exp->elts[pc + 1].longconst);
926
      (*pos) += 3 + BYTES_TO_EXP_ELEM (i + 1);
927
      if (noside == EVAL_SKIP)
928
        goto nosideret;
929
      return java_value_string (&exp->elts[pc + 2].string, i);
930
 
931
    case STRUCTOP_PTR:
932
      arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
933
      /* Convert object field (such as TYPE.class) to reference. */
934
      if (TYPE_CODE (value_type (arg1)) == TYPE_CODE_STRUCT)
935
        arg1 = value_addr (arg1);
936
      return arg1;
937
    default:
938
      break;
939
    }
940
standard:
941
  return evaluate_subexp_standard (expect_type, exp, pos, noside);
942
nosideret:
943
  return value_from_longest (builtin_type_long, (LONGEST) 1);
944
}
945
 
946
static char *java_demangle (const char *mangled, int options)
947
{
948
  return cplus_demangle (mangled, options | DMGL_JAVA);
949
}
950
 
951
/* Find the member function name of the demangled name NAME.  NAME
952
   must be a method name including arguments, in order to correctly
953
   locate the last component.
954
 
955
   This function return a pointer to the first dot before the
956
   member function name, or NULL if the name was not of the
957
   expected form.  */
958
 
959
static const char *
960
java_find_last_component (const char *name)
961
{
962
  const char *p;
963
 
964
  /* Find argument list.  */
965
  p = strchr (name, '(');
966
 
967
  if (p == NULL)
968
    return NULL;
969
 
970
  /* Back up and find first dot prior to argument list.  */
971
  while (p > name && *p != '.')
972
    p--;
973
 
974
  if (p == name)
975
    return NULL;
976
 
977
  return p;
978
}
979
 
980
/* Return the name of the class containing method PHYSNAME.  */
981
 
982
static char *
983
java_class_name_from_physname (const char *physname)
984
{
985
  char *ret = NULL;
986
  const char *end;
987
  int depth = 0;
988
  char *demangled_name = java_demangle (physname, DMGL_PARAMS | DMGL_ANSI);
989
 
990
  if (demangled_name == NULL)
991
    return NULL;
992
 
993
  end = java_find_last_component (demangled_name);
994
  if (end != NULL)
995
    {
996
      ret = xmalloc (end - demangled_name + 1);
997
      memcpy (ret, demangled_name, end - demangled_name);
998
      ret[end - demangled_name] = '\0';
999
    }
1000
 
1001
  xfree (demangled_name);
1002
  return ret;
1003
}
1004
 
1005
/* Table mapping opcodes into strings for printing operators
1006
   and precedences of the operators.  */
1007
 
1008
const struct op_print java_op_print_tab[] =
1009
{
1010
  {",", BINOP_COMMA, PREC_COMMA, 0},
1011
  {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
1012
  {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
1013
  {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
1014
  {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
1015
  {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
1016
  {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
1017
  {"==", BINOP_EQUAL, PREC_EQUAL, 0},
1018
  {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
1019
  {"<=", BINOP_LEQ, PREC_ORDER, 0},
1020
  {">=", BINOP_GEQ, PREC_ORDER, 0},
1021
  {">", BINOP_GTR, PREC_ORDER, 0},
1022
  {"<", BINOP_LESS, PREC_ORDER, 0},
1023
  {">>", BINOP_RSH, PREC_SHIFT, 0},
1024
  {"<<", BINOP_LSH, PREC_SHIFT, 0},
1025
#if 0
1026
  {">>>", BINOP_ ? ? ?, PREC_SHIFT, 0},
1027
#endif
1028
  {"+", BINOP_ADD, PREC_ADD, 0},
1029
  {"-", BINOP_SUB, PREC_ADD, 0},
1030
  {"*", BINOP_MUL, PREC_MUL, 0},
1031
  {"/", BINOP_DIV, PREC_MUL, 0},
1032
  {"%", BINOP_REM, PREC_MUL, 0},
1033
  {"-", UNOP_NEG, PREC_PREFIX, 0},
1034
  {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
1035
  {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
1036
  {"*", UNOP_IND, PREC_PREFIX, 0},
1037
#if 0
1038
  {"instanceof", ? ? ?, ? ? ?, 0},
1039
#endif
1040
  {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
1041
  {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
1042
  {NULL, 0, 0, 0}
1043
};
1044
 
1045
const struct exp_descriptor exp_descriptor_java =
1046
{
1047
  print_subexp_standard,
1048
  operator_length_standard,
1049
  op_name_standard,
1050
  dump_subexp_body_standard,
1051
  evaluate_subexp_java
1052
};
1053
 
1054
const struct language_defn java_language_defn =
1055
{
1056
  "java",                       /* Language name */
1057
  language_java,
1058
  range_check_off,
1059
  type_check_off,
1060
  case_sensitive_on,
1061
  array_row_major,
1062
  &exp_descriptor_java,
1063
  java_parse,
1064
  java_error,
1065
  null_post_parser,
1066
  c_printchar,                  /* Print a character constant */
1067
  c_printstr,                   /* Function to print string constant */
1068
  java_emit_char,               /* Function to print a single character */
1069
  java_print_type,              /* Print a type using appropriate syntax */
1070
  java_val_print,               /* Print a value using appropriate syntax */
1071
  java_value_print,             /* Print a top-level value */
1072
  NULL,                         /* Language specific skip_trampoline */
1073
  value_of_this,                /* value_of_this */
1074
  basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1075
  basic_lookup_transparent_type,/* lookup_transparent_type */
1076
  java_demangle,                /* Language specific symbol demangler */
1077
  java_class_name_from_physname,/* Language specific class name */
1078
  java_op_print_tab,            /* expression operators for printing */
1079
  0,                             /* not c-style arrays */
1080
  0,                             /* String lower bound */
1081
  default_word_break_characters,
1082
  default_make_symbol_completion_list,
1083
  c_language_arch_info,
1084
  default_print_array_index,
1085
  default_pass_by_reference,
1086
  LANG_MAGIC
1087
};
1088
 
1089
void
1090
_initialize_java_language (void)
1091
{
1092
 
1093
  java_int_type = init_type (TYPE_CODE_INT, 4, 0, "int", NULL);
1094
  java_short_type = init_type (TYPE_CODE_INT, 2, 0, "short", NULL);
1095
  java_long_type = init_type (TYPE_CODE_INT, 8, 0, "long", NULL);
1096
  java_byte_type = init_type (TYPE_CODE_INT, 1, 0, "byte", NULL);
1097
  java_boolean_type = init_type (TYPE_CODE_BOOL, 1, 0, "boolean", NULL);
1098
  java_char_type = init_type (TYPE_CODE_CHAR, 2, TYPE_FLAG_UNSIGNED, "char", NULL);
1099
  java_float_type = init_type (TYPE_CODE_FLT, 4, 0, "float", NULL);
1100
  java_double_type = init_type (TYPE_CODE_FLT, 8, 0, "double", NULL);
1101
  java_void_type = init_type (TYPE_CODE_VOID, 1, 0, "void", NULL);
1102
 
1103
  add_language (&java_language_defn);
1104
}

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