Upgrade GDB from 7.4.1 to 7.6.1 on the vendor branch
[dragonfly.git] / contrib / gdb-7 / gdb / jv-lang.c
CommitLineData
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1/* Java language support routines for GDB, the GNU debugger.
2
ef5ccd6c 3 Copyright (C) 1997-2013 Free Software Foundation, Inc.
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4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19
20#include "defs.h"
21#include "symtab.h"
22#include "gdbtypes.h"
23#include "expression.h"
24#include "parser-defs.h"
25#include "language.h"
26#include "gdbtypes.h"
27#include "symtab.h"
28#include "symfile.h"
29#include "objfiles.h"
30#include "gdb_string.h"
31#include "value.h"
32#include "c-lang.h"
33#include "jv-lang.h"
34#include "gdbcore.h"
35#include "block.h"
36#include "demangle.h"
37#include "dictionary.h"
38#include <ctype.h>
39#include "gdb_assert.h"
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40#include "charset.h"
41#include "valprint.h"
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42
43/* Local functions */
44
45extern void _initialize_java_language (void);
46
ef5ccd6c
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47static int java_demangled_signature_length (const char *);
48static void java_demangled_signature_copy (char *, const char *);
5796c8dc 49
cf7f2e2d 50static struct symtab *get_java_class_symtab (struct gdbarch *gdbarch);
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51static char *get_java_utf8_name (struct obstack *obstack, struct value *name);
52static int java_class_is_primitive (struct value *clas);
53static struct value *java_value_string (char *ptr, int len);
54
55static void java_emit_char (int c, struct type *type,
56 struct ui_file * stream, int quoter);
57
58static char *java_class_name_from_physname (const char *physname);
59
cf7f2e2d 60static const struct objfile_data *jv_dynamics_objfile_data_key;
cf7f2e2d 61
a45ae5f8
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62/* The dynamic objfile is kept per-program-space. This key lets us
63 associate the objfile with the program space. */
5796c8dc 64
a45ae5f8 65static const struct program_space_data *jv_dynamics_progspace_key;
cf7f2e2d 66
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67static struct type *java_link_class_type (struct gdbarch *,
68 struct type *, struct value *);
69
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70/* An instance of this structure is used to store some data that must
71 be freed. */
72
73struct jv_per_objfile_data
74{
75 /* The expandable dictionary we use. */
76 struct dictionary *dict;
77};
78
cf7f2e2d
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79/* A function called when the dynamics_objfile is freed. We use this
80 to clean up some internal state. */
81static void
a45ae5f8 82jv_per_objfile_free (struct objfile *objfile, void *data)
cf7f2e2d 83{
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84 struct jv_per_objfile_data *jv_data = data;
85 struct objfile *dynamics_objfile;
86
87 dynamics_objfile = program_space_data (current_program_space,
88 jv_dynamics_progspace_key);
cf7f2e2d 89 gdb_assert (objfile == dynamics_objfile);
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90
91 if (jv_data->dict)
92 dict_free (jv_data->dict);
93 xfree (jv_data);
94
95 set_program_space_data (current_program_space,
96 jv_dynamics_progspace_key,
97 NULL);
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98}
99
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100/* FIXME: carlton/2003-02-04: This is the main or only caller of
101 allocate_objfile with first argument NULL; as a result, this code
102 breaks every so often. Somebody should write a test case that
103 exercises GDB in various ways (e.g. something involving loading a
104 dynamic library) after this code has been called. */
105
106static struct objfile *
cf7f2e2d 107get_dynamics_objfile (struct gdbarch *gdbarch)
5796c8dc 108{
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109 struct objfile *dynamics_objfile;
110
111 dynamics_objfile = program_space_data (current_program_space,
112 jv_dynamics_progspace_key);
113
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114 if (dynamics_objfile == NULL)
115 {
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116 struct jv_per_objfile_data *data;
117
cf7f2e2d
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118 /* Mark it as shared so that it is cleared when the inferior is
119 re-run. */
120 dynamics_objfile = allocate_objfile (NULL, OBJF_SHARED);
121 dynamics_objfile->gdbarch = gdbarch;
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122
123 data = XCNEW (struct jv_per_objfile_data);
124 set_objfile_data (dynamics_objfile, jv_dynamics_objfile_data_key, data);
125
126 set_program_space_data (current_program_space,
127 jv_dynamics_progspace_key,
128 dynamics_objfile);
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129 }
130 return dynamics_objfile;
131}
132
5796c8dc 133static struct symtab *
cf7f2e2d 134get_java_class_symtab (struct gdbarch *gdbarch)
5796c8dc 135{
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136 struct objfile *objfile = get_dynamics_objfile (gdbarch);
137 struct symtab *class_symtab = objfile->symtabs;
138
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139 if (class_symtab == NULL)
140 {
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141 struct blockvector *bv;
142 struct block *bl;
a45ae5f8 143 struct jv_per_objfile_data *jv_data;
cf7f2e2d 144
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145 class_symtab = allocate_symtab ("<java-classes>", objfile);
146 class_symtab->language = language_java;
147 bv = (struct blockvector *)
148 obstack_alloc (&objfile->objfile_obstack,
149 sizeof (struct blockvector) + sizeof (struct block *));
150 BLOCKVECTOR_NBLOCKS (bv) = 1;
151 BLOCKVECTOR (class_symtab) = bv;
152
c50c785c 153 /* Allocate dummy STATIC_BLOCK. */
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154 bl = allocate_block (&objfile->objfile_obstack);
155 BLOCK_DICT (bl) = dict_create_linear (&objfile->objfile_obstack,
156 NULL);
157 BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = bl;
158
159 /* Allocate GLOBAL_BLOCK. */
ef5ccd6c 160 bl = allocate_global_block (&objfile->objfile_obstack);
5796c8dc 161 BLOCK_DICT (bl) = dict_create_hashed_expandable ();
ef5ccd6c 162 set_block_symtab (bl, class_symtab);
5796c8dc 163 BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
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164
165 /* Arrange to free the dict. */
166 jv_data = objfile_data (objfile, jv_dynamics_objfile_data_key);
167 jv_data->dict = BLOCK_DICT (bl);
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168 }
169 return class_symtab;
170}
171
172static void
173add_class_symtab_symbol (struct symbol *sym)
174{
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175 struct symtab *symtab
176 = get_java_class_symtab (get_objfile_arch (SYMBOL_SYMTAB (sym)->objfile));
5796c8dc 177 struct blockvector *bv = BLOCKVECTOR (symtab);
cf7f2e2d 178
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179 dict_add_symbol (BLOCK_DICT (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)), sym);
180}
181
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182static struct symbol *
183add_class_symbol (struct type *type, CORE_ADDR addr)
184{
185 struct symbol *sym;
a45ae5f8 186 struct objfile *objfile = get_dynamics_objfile (get_type_arch (type));
cf7f2e2d 187
5796c8dc 188 sym = (struct symbol *)
a45ae5f8 189 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
5796c8dc 190 memset (sym, 0, sizeof (struct symbol));
c50c785c 191 SYMBOL_SET_LANGUAGE (sym, language_java);
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192 SYMBOL_SET_LINKAGE_NAME (sym, TYPE_TAG_NAME (type));
193 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
194 /* SYMBOL_VALUE (sym) = valu; */
195 SYMBOL_TYPE (sym) = type;
196 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
197 SYMBOL_VALUE_ADDRESS (sym) = addr;
198 return sym;
199}
200
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201struct type *
202java_lookup_class (char *name)
203{
204 struct symbol *sym;
cf7f2e2d 205
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206 sym = lookup_symbol (name, expression_context_block, STRUCT_DOMAIN, NULL);
207 if (sym != NULL)
208 return SYMBOL_TYPE (sym);
c50c785c 209 /* FIXME - should search inferior's symbol table. */
5796c8dc 210 return NULL;
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211}
212
213/* Return a nul-terminated string (allocated on OBSTACK) for
c50c785c 214 a name given by NAME (which has type Utf8Const*). */
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215
216char *
217get_java_utf8_name (struct obstack *obstack, struct value *name)
218{
219 char *chrs;
220 struct value *temp = name;
221 int name_length;
222 CORE_ADDR data_addr;
cf7f2e2d 223
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224 temp = value_struct_elt (&temp, NULL, "length", NULL, "structure");
225 name_length = (int) value_as_long (temp);
226 data_addr = value_address (temp) + TYPE_LENGTH (value_type (temp));
227 chrs = obstack_alloc (obstack, name_length + 1);
228 chrs[name_length] = '\0';
229 read_memory (data_addr, (gdb_byte *) chrs, name_length);
230 return chrs;
231}
232
233struct value *
234java_class_from_object (struct value *obj_val)
235{
236 /* This is all rather inefficient, since the offsets of vtable and
237 class are fixed. FIXME */
238 struct value *vtable_val;
239
240 if (TYPE_CODE (value_type (obj_val)) == TYPE_CODE_PTR
241 && TYPE_LENGTH (TYPE_TARGET_TYPE (value_type (obj_val))) == 0)
242 obj_val = value_at (get_java_object_type (),
243 value_as_address (obj_val));
244
245 vtable_val = value_struct_elt (&obj_val, NULL, "vtable", NULL, "structure");
246 return value_struct_elt (&vtable_val, NULL, "class", NULL, "structure");
247}
248
249/* Check if CLASS_IS_PRIMITIVE(value of clas): */
250static int
251java_class_is_primitive (struct value *clas)
252{
c50c785c
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253 struct value *vtable = value_struct_elt (&clas, NULL, "vtable",
254 NULL, "struct");
5796c8dc 255 CORE_ADDR i = value_as_address (vtable);
cf7f2e2d 256
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257 return (int) (i & 0x7fffffff) == (int) 0x7fffffff;
258}
259
c50c785c 260/* Read a GCJ Class object, and generated a gdb (TYPE_CODE_STRUCT) type. */
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261
262struct type *
263type_from_class (struct gdbarch *gdbarch, struct value *clas)
264{
265 struct type *type;
266 char *name;
267 struct value *temp;
268 struct objfile *objfile;
269 struct value *utf8_name;
270 char *nptr;
271 CORE_ADDR addr;
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272
273 type = check_typedef (value_type (clas));
274 if (TYPE_CODE (type) == TYPE_CODE_PTR)
275 {
276 if (value_logical_not (clas))
277 return NULL;
278 clas = value_ind (clas);
279 }
280 addr = value_address (clas);
281
cf7f2e2d 282 objfile = get_dynamics_objfile (gdbarch);
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283 if (java_class_is_primitive (clas))
284 {
285 struct value *sig;
cf7f2e2d 286
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287 temp = clas;
288 sig = value_struct_elt (&temp, NULL, "method_count", NULL, "structure");
289 return java_primitive_type (gdbarch, value_as_long (sig));
290 }
291
c50c785c
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292 /* Get Class name. */
293 /* If clasloader non-null, prepend loader address. FIXME */
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294 temp = clas;
295 utf8_name = value_struct_elt (&temp, NULL, "name", NULL, "structure");
296 name = get_java_utf8_name (&objfile->objfile_obstack, utf8_name);
297 for (nptr = name; *nptr != 0; nptr++)
298 {
299 if (*nptr == '/')
300 *nptr = '.';
301 }
302
303 type = java_lookup_class (name);
304 if (type != NULL)
305 return type;
306
cf7f2e2d 307 type = alloc_type (objfile);
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308 TYPE_CODE (type) = TYPE_CODE_STRUCT;
309 INIT_CPLUS_SPECIFIC (type);
310
311 if (name[0] == '[')
312 {
313 char *signature = name;
314 int namelen = java_demangled_signature_length (signature);
cf7f2e2d 315
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316 if (namelen > strlen (name))
317 name = obstack_alloc (&objfile->objfile_obstack, namelen + 1);
318 java_demangled_signature_copy (name, signature);
319 name[namelen] = '\0';
5796c8dc 320 temp = clas;
c50c785c 321 /* Set array element type. */
5796c8dc 322 temp = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
c50c785c
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323 deprecated_set_value_type (temp,
324 lookup_pointer_type (value_type (clas)));
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325 TYPE_TARGET_TYPE (type) = type_from_class (gdbarch, temp);
326 }
327
328 ALLOCATE_CPLUS_STRUCT_TYPE (type);
329 TYPE_TAG_NAME (type) = name;
330
331 add_class_symtab_symbol (add_class_symbol (type, addr));
332 return java_link_class_type (gdbarch, type, clas);
333}
334
c50c785c 335/* Fill in class TYPE with data from the CLAS value. */
5796c8dc 336
cf7f2e2d 337static struct type *
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338java_link_class_type (struct gdbarch *gdbarch,
339 struct type *type, struct value *clas)
340{
341 struct value *temp;
ef5ccd6c
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342 const char *unqualified_name;
343 const char *name = TYPE_TAG_NAME (type);
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344 int ninterfaces, nfields, nmethods;
345 int type_is_object = 0;
346 struct fn_field *fn_fields;
347 struct fn_fieldlist *fn_fieldlists;
348 struct value *fields;
349 struct value *methods;
350 struct value *method = NULL;
351 struct value *field = NULL;
352 int i, j;
cf7f2e2d 353 struct objfile *objfile = get_dynamics_objfile (gdbarch);
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354 struct type *tsuper;
355
356 gdb_assert (name != NULL);
357 unqualified_name = strrchr (name, '.');
358 if (unqualified_name == NULL)
359 unqualified_name = name;
360
361 temp = clas;
362 temp = value_struct_elt (&temp, NULL, "superclass", NULL, "structure");
363 if (strcmp (name, "java.lang.Object") == 0)
364 {
365 tsuper = get_java_object_type ();
366 if (tsuper && TYPE_CODE (tsuper) == TYPE_CODE_PTR)
367 tsuper = TYPE_TARGET_TYPE (tsuper);
368 type_is_object = 1;
369 }
370 else
371 tsuper = type_from_class (gdbarch, temp);
372
373#if 1
374 ninterfaces = 0;
375#else
376 temp = clas;
c50c785c
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377 ninterfaces = value_as_long (value_struct_elt (&temp, NULL, "interface_len",
378 NULL, "structure"));
5796c8dc
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379#endif
380 TYPE_N_BASECLASSES (type) = (tsuper == NULL ? 0 : 1) + ninterfaces;
381 temp = clas;
c50c785c
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382 nfields = value_as_long (value_struct_elt (&temp, NULL, "field_count",
383 NULL, "structure"));
5796c8dc 384 nfields += TYPE_N_BASECLASSES (type);
c50c785c 385 nfields++; /* Add one for dummy "class" field. */
5796c8dc
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386 TYPE_NFIELDS (type) = nfields;
387 TYPE_FIELDS (type) = (struct field *)
388 TYPE_ALLOC (type, sizeof (struct field) * nfields);
389
390 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
391
392 TYPE_FIELD_PRIVATE_BITS (type) =
393 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
394 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
395
396 TYPE_FIELD_PROTECTED_BITS (type) =
397 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
398 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
399
400 TYPE_FIELD_IGNORE_BITS (type) =
401 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
402 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
403
404 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
405 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
406 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
407
408 if (tsuper != NULL)
409 {
410 TYPE_BASECLASS (type, 0) = tsuper;
411 if (type_is_object)
412 SET_TYPE_FIELD_PRIVATE (type, 0);
413 }
414
415 i = strlen (name);
416 if (i > 2 && name[i - 1] == ']' && tsuper != NULL)
417 {
418 /* FIXME */
c50c785c 419 TYPE_LENGTH (type) = TYPE_LENGTH (tsuper) + 4; /* size with "length" */
5796c8dc
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420 }
421 else
422 {
423 temp = clas;
c50c785c
JM
424 temp = value_struct_elt (&temp, NULL, "size_in_bytes",
425 NULL, "structure");
5796c8dc
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426 TYPE_LENGTH (type) = value_as_long (temp);
427 }
428
429 fields = NULL;
c50c785c 430 nfields--; /* First set up dummy "class" field. */
5796c8dc
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431 SET_FIELD_PHYSADDR (TYPE_FIELD (type, nfields), value_address (clas));
432 TYPE_FIELD_NAME (type, nfields) = "class";
433 TYPE_FIELD_TYPE (type, nfields) = value_type (clas);
434 SET_TYPE_FIELD_PRIVATE (type, nfields);
435
436 for (i = TYPE_N_BASECLASSES (type); i < nfields; i++)
437 {
438 int accflags;
439 int boffset;
cf7f2e2d 440
5796c8dc
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441 if (fields == NULL)
442 {
443 temp = clas;
444 fields = value_struct_elt (&temp, NULL, "fields", NULL, "structure");
445 field = value_ind (fields);
446 }
447 else
c50c785c 448 { /* Re-use field value for next field. */
5796c8dc
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449 CORE_ADDR addr
450 = value_address (field) + TYPE_LENGTH (value_type (field));
cf7f2e2d 451
5796c8dc
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452 set_value_address (field, addr);
453 set_value_lazy (field, 1);
454 }
455 temp = field;
456 temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
457 TYPE_FIELD_NAME (type, i) =
458 get_java_utf8_name (&objfile->objfile_obstack, temp);
459 temp = field;
460 accflags = value_as_long (value_struct_elt (&temp, NULL, "accflags",
461 NULL, "structure"));
462 temp = field;
463 temp = value_struct_elt (&temp, NULL, "info", NULL, "structure");
464 boffset = value_as_long (value_struct_elt (&temp, NULL, "boffset",
465 NULL, "structure"));
466 if (accflags & 0x0001) /* public access */
467 {
468 /* ??? */
469 }
470 if (accflags & 0x0002) /* private access */
471 {
472 SET_TYPE_FIELD_PRIVATE (type, i);
473 }
474 if (accflags & 0x0004) /* protected access */
475 {
476 SET_TYPE_FIELD_PROTECTED (type, i);
477 }
478 if (accflags & 0x0008) /* ACC_STATIC */
479 SET_FIELD_PHYSADDR (TYPE_FIELD (type, i), boffset);
480 else
ef5ccd6c 481 SET_FIELD_BITPOS (TYPE_FIELD (type, i), 8 * boffset);
5796c8dc
SS
482 if (accflags & 0x8000) /* FIELD_UNRESOLVED_FLAG */
483 {
484 TYPE_FIELD_TYPE (type, i) = get_java_object_type (); /* FIXME */
485 }
486 else
487 {
488 struct type *ftype;
cf7f2e2d 489
5796c8dc
SS
490 temp = field;
491 temp = value_struct_elt (&temp, NULL, "type", NULL, "structure");
492 ftype = type_from_class (gdbarch, temp);
493 if (TYPE_CODE (ftype) == TYPE_CODE_STRUCT)
494 ftype = lookup_pointer_type (ftype);
495 TYPE_FIELD_TYPE (type, i) = ftype;
496 }
497 }
498
499 temp = clas;
500 nmethods = value_as_long (value_struct_elt (&temp, NULL, "method_count",
501 NULL, "structure"));
5796c8dc
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502 j = nmethods * sizeof (struct fn_field);
503 fn_fields = (struct fn_field *)
a45ae5f8 504 obstack_alloc (&objfile->objfile_obstack, j);
5796c8dc
SS
505 memset (fn_fields, 0, j);
506 fn_fieldlists = (struct fn_fieldlist *)
507 alloca (nmethods * sizeof (struct fn_fieldlist));
508
509 methods = NULL;
510 for (i = 0; i < nmethods; i++)
511 {
ef5ccd6c 512 const char *mname;
5796c8dc 513 int k;
cf7f2e2d 514
5796c8dc
SS
515 if (methods == NULL)
516 {
517 temp = clas;
c50c785c
JM
518 methods = value_struct_elt (&temp, NULL, "methods",
519 NULL, "structure");
5796c8dc
SS
520 method = value_ind (methods);
521 }
522 else
c50c785c 523 { /* Re-use method value for next method. */
5796c8dc
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524 CORE_ADDR addr
525 = value_address (method) + TYPE_LENGTH (value_type (method));
cf7f2e2d 526
5796c8dc
SS
527 set_value_address (method, addr);
528 set_value_lazy (method, 1);
529 }
530
c50c785c 531 /* Get method name. */
5796c8dc
SS
532 temp = method;
533 temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
534 mname = get_java_utf8_name (&objfile->objfile_obstack, temp);
535 if (strcmp (mname, "<init>") == 0)
536 mname = unqualified_name;
537
538 /* Check for an existing method with the same name.
539 * This makes building the fn_fieldslists an O(nmethods**2)
540 * operation. That could be using hashing, but I doubt it
541 * is worth it. Note that we do maintain the order of methods
542 * in the inferior's Method table (as long as that is grouped
543 * by method name), which I think is desirable. --PB */
544 for (k = 0, j = TYPE_NFN_FIELDS (type);;)
545 {
546 if (--j < 0)
c50c785c 547 { /* No match - new method name. */
5796c8dc
SS
548 j = TYPE_NFN_FIELDS (type)++;
549 fn_fieldlists[j].name = mname;
550 fn_fieldlists[j].length = 1;
551 fn_fieldlists[j].fn_fields = &fn_fields[i];
552 k = i;
553 break;
554 }
555 if (strcmp (mname, fn_fieldlists[j].name) == 0)
c50c785c 556 { /* Found an existing method with the same name. */
5796c8dc 557 int l;
cf7f2e2d 558
5796c8dc
SS
559 if (mname != unqualified_name)
560 obstack_free (&objfile->objfile_obstack, mname);
561 mname = fn_fieldlists[j].name;
562 fn_fieldlists[j].length++;
c50c785c
JM
563 k = i - k; /* Index of new slot. */
564 /* Shift intervening fn_fields (between k and i) down. */
5796c8dc
SS
565 for (l = i; l > k; l--)
566 fn_fields[l] = fn_fields[l - 1];
567 for (l = TYPE_NFN_FIELDS (type); --l > j;)
568 fn_fieldlists[l].fn_fields++;
569 break;
570 }
571 k += fn_fieldlists[j].length;
572 }
573 fn_fields[k].physname = "";
574 fn_fields[k].is_stub = 1;
575 /* FIXME */
576 fn_fields[k].type = lookup_function_type
577 (builtin_java_type (gdbarch)->builtin_void);
578 TYPE_CODE (fn_fields[k].type) = TYPE_CODE_METHOD;
579 }
580
581 j = TYPE_NFN_FIELDS (type) * sizeof (struct fn_fieldlist);
582 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
a45ae5f8 583 obstack_alloc (&objfile->objfile_obstack, j);
5796c8dc
SS
584 memcpy (TYPE_FN_FIELDLISTS (type), fn_fieldlists, j);
585
586 return type;
587}
588
5796c8dc
SS
589struct type *
590get_java_object_type (void)
591{
a45ae5f8 592 struct symbol *sym;
cf7f2e2d 593
a45ae5f8
JM
594 sym = lookup_symbol ("java.lang.Object", NULL, STRUCT_DOMAIN, NULL);
595 if (sym == NULL)
596 error (_("cannot find java.lang.Object"));
597 return SYMBOL_TYPE (sym);
5796c8dc
SS
598}
599
600int
601get_java_object_header_size (struct gdbarch *gdbarch)
602{
603 struct type *objtype = get_java_object_type ();
cf7f2e2d 604
5796c8dc
SS
605 if (objtype == NULL)
606 return (2 * gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT);
607 else
608 return TYPE_LENGTH (objtype);
609}
610
611int
612is_object_type (struct type *type)
613{
614 CHECK_TYPEDEF (type);
615 if (TYPE_CODE (type) == TYPE_CODE_PTR)
616 {
617 struct type *ttype = check_typedef (TYPE_TARGET_TYPE (type));
ef5ccd6c 618 const char *name;
5796c8dc
SS
619 if (TYPE_CODE (ttype) != TYPE_CODE_STRUCT)
620 return 0;
621 while (TYPE_N_BASECLASSES (ttype) > 0)
622 ttype = TYPE_BASECLASS (ttype, 0);
623 name = TYPE_TAG_NAME (ttype);
624 if (name != NULL && strcmp (name, "java.lang.Object") == 0)
625 return 1;
c50c785c
JM
626 name
627 = TYPE_NFIELDS (ttype) > 0 ? TYPE_FIELD_NAME (ttype, 0) : (char *) 0;
5796c8dc 628 if (name != NULL && strcmp (name, "vtable") == 0)
a45ae5f8 629 return 1;
5796c8dc
SS
630 }
631 return 0;
632}
633
634struct type *
635java_primitive_type (struct gdbarch *gdbarch, int signature)
636{
637 const struct builtin_java_type *builtin = builtin_java_type (gdbarch);
638
639 switch (signature)
640 {
641 case 'B':
642 return builtin->builtin_byte;
643 case 'S':
644 return builtin->builtin_short;
645 case 'I':
646 return builtin->builtin_int;
647 case 'J':
648 return builtin->builtin_long;
649 case 'Z':
650 return builtin->builtin_boolean;
651 case 'C':
652 return builtin->builtin_char;
653 case 'F':
654 return builtin->builtin_float;
655 case 'D':
656 return builtin->builtin_double;
657 case 'V':
658 return builtin->builtin_void;
659 }
660 error (_("unknown signature '%c' for primitive type"), (char) signature);
661}
662
663/* If name[0 .. namelen-1] is the name of a primitive Java type,
c50c785c 664 return that type. Otherwise, return NULL. */
5796c8dc
SS
665
666struct type *
667java_primitive_type_from_name (struct gdbarch *gdbarch,
ef5ccd6c 668 const char *name, int namelen)
5796c8dc
SS
669{
670 const struct builtin_java_type *builtin = builtin_java_type (gdbarch);
671
672 switch (name[0])
673 {
674 case 'b':
675 if (namelen == 4 && memcmp (name, "byte", 4) == 0)
676 return builtin->builtin_byte;
677 if (namelen == 7 && memcmp (name, "boolean", 7) == 0)
678 return builtin->builtin_boolean;
679 break;
680 case 'c':
681 if (namelen == 4 && memcmp (name, "char", 4) == 0)
682 return builtin->builtin_char;
c50c785c 683 break;
5796c8dc
SS
684 case 'd':
685 if (namelen == 6 && memcmp (name, "double", 6) == 0)
686 return builtin->builtin_double;
687 break;
688 case 'f':
689 if (namelen == 5 && memcmp (name, "float", 5) == 0)
690 return builtin->builtin_float;
691 break;
692 case 'i':
693 if (namelen == 3 && memcmp (name, "int", 3) == 0)
694 return builtin->builtin_int;
695 break;
696 case 'l':
697 if (namelen == 4 && memcmp (name, "long", 4) == 0)
698 return builtin->builtin_long;
699 break;
700 case 's':
701 if (namelen == 5 && memcmp (name, "short", 5) == 0)
702 return builtin->builtin_short;
703 break;
704 case 'v':
705 if (namelen == 4 && memcmp (name, "void", 4) == 0)
706 return builtin->builtin_void;
707 break;
708 }
709 return NULL;
710}
711
712static char *
713java_primitive_type_name (int signature)
714{
715 switch (signature)
716 {
717 case 'B':
718 return "byte";
719 case 'S':
720 return "short";
721 case 'I':
722 return "int";
723 case 'J':
724 return "long";
725 case 'Z':
726 return "boolean";
727 case 'C':
728 return "char";
729 case 'F':
730 return "float";
731 case 'D':
732 return "double";
733 case 'V':
734 return "void";
735 }
736 error (_("unknown signature '%c' for primitive type"), (char) signature);
737}
738
739/* Return the length (in bytes) of demangled name of the Java type
c50c785c 740 signature string SIGNATURE. */
5796c8dc
SS
741
742static int
ef5ccd6c 743java_demangled_signature_length (const char *signature)
5796c8dc
SS
744{
745 int array = 0;
cf7f2e2d 746
5796c8dc 747 for (; *signature == '['; signature++)
c50c785c 748 array += 2; /* Two chars for "[]". */
5796c8dc
SS
749 switch (signature[0])
750 {
751 case 'L':
c50c785c 752 /* Subtract 2 for 'L' and ';'. */
5796c8dc
SS
753 return strlen (signature) - 2 + array;
754 default:
755 return strlen (java_primitive_type_name (signature[0])) + array;
756 }
757}
758
c50c785c
JM
759/* Demangle the Java type signature SIGNATURE, leaving the result in
760 RESULT. */
5796c8dc
SS
761
762static void
ef5ccd6c 763java_demangled_signature_copy (char *result, const char *signature)
5796c8dc
SS
764{
765 int array = 0;
766 char *ptr;
767 int i;
cf7f2e2d 768
5796c8dc
SS
769 while (*signature == '[')
770 {
771 array++;
772 signature++;
773 }
774 switch (signature[0])
775 {
776 case 'L':
c50c785c 777 /* Subtract 2 for 'L' and ';', but add 1 for final nul. */
5796c8dc
SS
778 signature++;
779 ptr = result;
780 for (; *signature != ';' && *signature != '\0'; signature++)
781 {
782 if (*signature == '/')
783 *ptr++ = '.';
784 else
785 *ptr++ = *signature;
786 }
787 break;
788 default:
789 ptr = java_primitive_type_name (signature[0]);
790 i = strlen (ptr);
791 strcpy (result, ptr);
792 ptr = result + i;
793 break;
794 }
795 while (--array >= 0)
796 {
797 *ptr++ = '[';
798 *ptr++ = ']';
799 }
800}
801
802/* Return the demangled name of the Java type signature string SIGNATURE,
c50c785c 803 as a freshly allocated copy. */
5796c8dc
SS
804
805char *
ef5ccd6c 806java_demangle_type_signature (const char *signature)
5796c8dc
SS
807{
808 int length = java_demangled_signature_length (signature);
809 char *result = xmalloc (length + 1);
cf7f2e2d 810
5796c8dc
SS
811 java_demangled_signature_copy (result, signature);
812 result[length] = '\0';
813 return result;
814}
815
816/* Return the type of TYPE followed by DIMS pairs of [ ].
c50c785c 817 If DIMS == 0, TYPE is returned. */
5796c8dc
SS
818
819struct type *
820java_array_type (struct type *type, int dims)
821{
822 while (dims-- > 0)
823 {
c50c785c 824 /* FIXME This is bogus! Java arrays are not gdb arrays! */
5796c8dc
SS
825 type = lookup_array_range_type (type, 0, 0);
826 }
827
828 return type;
829}
830
c50c785c 831/* Create a Java string in the inferior from a (Utf8) literal. */
5796c8dc
SS
832
833static struct value *
834java_value_string (char *ptr, int len)
835{
836 error (_("not implemented - java_value_string")); /* FIXME */
837}
838
a45ae5f8
JM
839/* Return the encoding that should be used for the character type
840 TYPE. */
841
842static const char *
843java_get_encoding (struct type *type)
844{
845 struct gdbarch *arch = get_type_arch (type);
846 const char *encoding;
847
848 if (type == builtin_java_type (arch)->builtin_char)
849 {
850 if (gdbarch_byte_order (arch) == BFD_ENDIAN_BIG)
851 encoding = "UTF-16BE";
852 else
853 encoding = "UTF-16LE";
854 }
855 else
856 encoding = target_charset (arch);
857
858 return encoding;
859}
860
5796c8dc
SS
861/* Print the character C on STREAM as part of the contents of a literal
862 string whose delimiter is QUOTER. Note that that format for printing
c50c785c 863 characters and strings is language specific. */
5796c8dc
SS
864
865static void
866java_emit_char (int c, struct type *type, struct ui_file *stream, int quoter)
867{
a45ae5f8
JM
868 const char *encoding = java_get_encoding (type);
869
870 generic_emit_char (c, type, stream, quoter, encoding);
871}
872
873/* Implementation of la_printchar method. */
874
875static void
876java_printchar (int c, struct type *type, struct ui_file *stream)
877{
878 fputs_filtered ("'", stream);
879 LA_EMIT_CHAR (c, type, stream, '\'');
880 fputs_filtered ("'", stream);
881}
882
883/* Implementation of la_printstr method. */
884
885static void
886java_printstr (struct ui_file *stream, struct type *type,
887 const gdb_byte *string,
888 unsigned int length, const char *encoding, int force_ellipses,
889 const struct value_print_options *options)
890{
891 const char *type_encoding = java_get_encoding (type);
892
893 if (!encoding || !*encoding)
894 encoding = type_encoding;
895
896 generic_printstr (stream, type, string, length, encoding,
897 force_ellipses, '"', 0, options);
5796c8dc
SS
898}
899
900static struct value *
901evaluate_subexp_java (struct type *expect_type, struct expression *exp,
902 int *pos, enum noside noside)
903{
904 int pc = *pos;
905 int i;
ef5ccd6c 906 const char *name;
5796c8dc
SS
907 enum exp_opcode op = exp->elts[*pos].opcode;
908 struct value *arg1;
909 struct value *arg2;
910 struct type *type;
cf7f2e2d 911
5796c8dc
SS
912 switch (op)
913 {
914 case UNOP_IND:
915 if (noside == EVAL_SKIP)
916 goto standard;
917 (*pos)++;
918 arg1 = evaluate_subexp_java (NULL_TYPE, exp, pos, EVAL_NORMAL);
919 if (is_object_type (value_type (arg1)))
920 {
921 struct type *type;
922
923 type = type_from_class (exp->gdbarch, java_class_from_object (arg1));
924 arg1 = value_cast (lookup_pointer_type (type), arg1);
925 }
5796c8dc
SS
926 return value_ind (arg1);
927
928 case BINOP_SUBSCRIPT:
929 (*pos)++;
930 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
931 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
932 if (noside == EVAL_SKIP)
933 goto nosideret;
934 /* If the user attempts to subscript something that is not an
935 array or pointer type (like a plain int variable for example),
c50c785c 936 then report this as an error. */
5796c8dc
SS
937
938 arg1 = coerce_ref (arg1);
939 type = check_typedef (value_type (arg1));
940 if (TYPE_CODE (type) == TYPE_CODE_PTR)
941 type = check_typedef (TYPE_TARGET_TYPE (type));
942 name = TYPE_NAME (type);
943 if (name == NULL)
944 name = TYPE_TAG_NAME (type);
945 i = name == NULL ? 0 : strlen (name);
946 if (TYPE_CODE (type) == TYPE_CODE_STRUCT
947 && i > 2 && name[i - 1] == ']')
948 {
949 enum bfd_endian byte_order = gdbarch_byte_order (exp->gdbarch);
950 CORE_ADDR address;
951 long length, index;
952 struct type *el_type;
953 gdb_byte buf4[4];
954
955 struct value *clas = java_class_from_object (arg1);
956 struct value *temp = clas;
c50c785c 957 /* Get CLASS_ELEMENT_TYPE of the array type. */
5796c8dc
SS
958 temp = value_struct_elt (&temp, NULL, "methods",
959 NULL, "structure");
960 deprecated_set_value_type (temp, value_type (clas));
961 el_type = type_from_class (exp->gdbarch, temp);
962 if (TYPE_CODE (el_type) == TYPE_CODE_STRUCT)
963 el_type = lookup_pointer_type (el_type);
964
965 if (noside == EVAL_AVOID_SIDE_EFFECTS)
966 return value_zero (el_type, VALUE_LVAL (arg1));
967 address = value_as_address (arg1);
968 address += get_java_object_header_size (exp->gdbarch);
969 read_memory (address, buf4, 4);
970 length = (long) extract_signed_integer (buf4, 4, byte_order);
971 index = (long) value_as_long (arg2);
972 if (index >= length || index < 0)
973 error (_("array index (%ld) out of bounds (length: %ld)"),
974 index, length);
975 address = (address + 4) + index * TYPE_LENGTH (el_type);
976 return value_at (el_type, address);
977 }
978 else if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
979 {
980 if (noside == EVAL_AVOID_SIDE_EFFECTS)
981 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
982 else
983 return value_subscript (arg1, value_as_long (arg2));
984 }
985 if (name)
986 error (_("cannot subscript something of type `%s'"), name);
987 else
988 error (_("cannot subscript requested type"));
989
990 case OP_STRING:
991 (*pos)++;
992 i = longest_to_int (exp->elts[pc + 1].longconst);
993 (*pos) += 3 + BYTES_TO_EXP_ELEM (i + 1);
994 if (noside == EVAL_SKIP)
995 goto nosideret;
996 return java_value_string (&exp->elts[pc + 2].string, i);
997
998 case STRUCTOP_PTR:
999 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
c50c785c 1000 /* Convert object field (such as TYPE.class) to reference. */
5796c8dc
SS
1001 if (TYPE_CODE (value_type (arg1)) == TYPE_CODE_STRUCT)
1002 arg1 = value_addr (arg1);
1003 return arg1;
1004 default:
1005 break;
1006 }
1007standard:
1008 return evaluate_subexp_standard (expect_type, exp, pos, noside);
1009nosideret:
1010 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
1011}
1012
1013static char *java_demangle (const char *mangled, int options)
1014{
1015 return cplus_demangle (mangled, options | DMGL_JAVA);
1016}
1017
1018/* Find the member function name of the demangled name NAME. NAME
1019 must be a method name including arguments, in order to correctly
1020 locate the last component.
1021
1022 This function return a pointer to the first dot before the
1023 member function name, or NULL if the name was not of the
1024 expected form. */
1025
1026static const char *
1027java_find_last_component (const char *name)
1028{
1029 const char *p;
1030
1031 /* Find argument list. */
1032 p = strchr (name, '(');
1033
1034 if (p == NULL)
1035 return NULL;
1036
1037 /* Back up and find first dot prior to argument list. */
1038 while (p > name && *p != '.')
1039 p--;
1040
1041 if (p == name)
1042 return NULL;
1043
1044 return p;
1045}
1046
1047/* Return the name of the class containing method PHYSNAME. */
1048
1049static char *
1050java_class_name_from_physname (const char *physname)
1051{
1052 char *ret = NULL;
1053 const char *end;
5796c8dc
SS
1054 char *demangled_name = java_demangle (physname, DMGL_PARAMS | DMGL_ANSI);
1055
1056 if (demangled_name == NULL)
1057 return NULL;
1058
1059 end = java_find_last_component (demangled_name);
1060 if (end != NULL)
1061 {
1062 ret = xmalloc (end - demangled_name + 1);
1063 memcpy (ret, demangled_name, end - demangled_name);
1064 ret[end - demangled_name] = '\0';
1065 }
1066
1067 xfree (demangled_name);
1068 return ret;
1069}
1070
1071/* Table mapping opcodes into strings for printing operators
1072 and precedences of the operators. */
1073
1074const struct op_print java_op_print_tab[] =
1075{
1076 {",", BINOP_COMMA, PREC_COMMA, 0},
1077 {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
1078 {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
1079 {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
1080 {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
1081 {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
1082 {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
1083 {"==", BINOP_EQUAL, PREC_EQUAL, 0},
1084 {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
1085 {"<=", BINOP_LEQ, PREC_ORDER, 0},
1086 {">=", BINOP_GEQ, PREC_ORDER, 0},
1087 {">", BINOP_GTR, PREC_ORDER, 0},
1088 {"<", BINOP_LESS, PREC_ORDER, 0},
1089 {">>", BINOP_RSH, PREC_SHIFT, 0},
1090 {"<<", BINOP_LSH, PREC_SHIFT, 0},
5796c8dc
SS
1091 {"+", BINOP_ADD, PREC_ADD, 0},
1092 {"-", BINOP_SUB, PREC_ADD, 0},
1093 {"*", BINOP_MUL, PREC_MUL, 0},
1094 {"/", BINOP_DIV, PREC_MUL, 0},
1095 {"%", BINOP_REM, PREC_MUL, 0},
1096 {"-", UNOP_NEG, PREC_PREFIX, 0},
1097 {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
1098 {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
1099 {"*", UNOP_IND, PREC_PREFIX, 0},
5796c8dc
SS
1100 {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
1101 {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
1102 {NULL, 0, 0, 0}
1103};
1104
1105enum java_primitive_types
1106{
1107 java_primitive_type_int,
1108 java_primitive_type_short,
1109 java_primitive_type_long,
1110 java_primitive_type_byte,
1111 java_primitive_type_boolean,
1112 java_primitive_type_char,
1113 java_primitive_type_float,
1114 java_primitive_type_double,
1115 java_primitive_type_void,
1116 nr_java_primitive_types
1117};
1118
1119static void
1120java_language_arch_info (struct gdbarch *gdbarch,
1121 struct language_arch_info *lai)
1122{
1123 const struct builtin_java_type *builtin = builtin_java_type (gdbarch);
1124
1125 lai->string_char_type = builtin->builtin_char;
1126 lai->primitive_type_vector
1127 = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_java_primitive_types + 1,
1128 struct type *);
1129 lai->primitive_type_vector [java_primitive_type_int]
1130 = builtin->builtin_int;
1131 lai->primitive_type_vector [java_primitive_type_short]
1132 = builtin->builtin_short;
1133 lai->primitive_type_vector [java_primitive_type_long]
1134 = builtin->builtin_long;
1135 lai->primitive_type_vector [java_primitive_type_byte]
1136 = builtin->builtin_byte;
1137 lai->primitive_type_vector [java_primitive_type_boolean]
1138 = builtin->builtin_boolean;
1139 lai->primitive_type_vector [java_primitive_type_char]
1140 = builtin->builtin_char;
1141 lai->primitive_type_vector [java_primitive_type_float]
1142 = builtin->builtin_float;
1143 lai->primitive_type_vector [java_primitive_type_double]
1144 = builtin->builtin_double;
1145 lai->primitive_type_vector [java_primitive_type_void]
1146 = builtin->builtin_void;
1147
1148 lai->bool_type_symbol = "boolean";
1149 lai->bool_type_default = builtin->builtin_boolean;
1150}
1151
1152const struct exp_descriptor exp_descriptor_java =
1153{
1154 print_subexp_standard,
1155 operator_length_standard,
cf7f2e2d 1156 operator_check_standard,
5796c8dc
SS
1157 op_name_standard,
1158 dump_subexp_body_standard,
1159 evaluate_subexp_java
1160};
1161
1162const struct language_defn java_language_defn =
1163{
1164 "java", /* Language name */
1165 language_java,
1166 range_check_off,
5796c8dc
SS
1167 case_sensitive_on,
1168 array_row_major,
1169 macro_expansion_no,
1170 &exp_descriptor_java,
1171 java_parse,
1172 java_error,
1173 null_post_parser,
a45ae5f8
JM
1174 java_printchar, /* Print a character constant */
1175 java_printstr, /* Function to print string constant */
5796c8dc
SS
1176 java_emit_char, /* Function to print a single character */
1177 java_print_type, /* Print a type using appropriate syntax */
1178 default_print_typedef, /* Print a typedef using appropriate syntax */
1179 java_val_print, /* Print a value using appropriate syntax */
1180 java_value_print, /* Print a top-level value */
ef5ccd6c 1181 default_read_var_value, /* la_read_var_value */
5796c8dc
SS
1182 NULL, /* Language specific skip_trampoline */
1183 "this", /* name_of_this */
1184 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1185 basic_lookup_transparent_type,/* lookup_transparent_type */
1186 java_demangle, /* Language specific symbol demangler */
1187 java_class_name_from_physname,/* Language specific class name */
1188 java_op_print_tab, /* expression operators for printing */
1189 0, /* not c-style arrays */
1190 0, /* String lower bound */
1191 default_word_break_characters,
1192 default_make_symbol_completion_list,
1193 java_language_arch_info,
1194 default_print_array_index,
1195 default_pass_by_reference,
1196 default_get_string,
ef5ccd6c 1197 NULL, /* la_get_symbol_name_cmp */
a45ae5f8 1198 iterate_over_symbols,
5796c8dc
SS
1199 LANG_MAGIC
1200};
1201
1202static void *
1203build_java_types (struct gdbarch *gdbarch)
1204{
1205 struct builtin_java_type *builtin_java_type
1206 = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_java_type);
1207
1208 builtin_java_type->builtin_int
1209 = arch_integer_type (gdbarch, 32, 0, "int");
1210 builtin_java_type->builtin_short
1211 = arch_integer_type (gdbarch, 16, 0, "short");
1212 builtin_java_type->builtin_long
1213 = arch_integer_type (gdbarch, 64, 0, "long");
1214 builtin_java_type->builtin_byte
1215 = arch_integer_type (gdbarch, 8, 0, "byte");
1216 builtin_java_type->builtin_boolean
1217 = arch_boolean_type (gdbarch, 8, 0, "boolean");
1218 builtin_java_type->builtin_char
1219 = arch_character_type (gdbarch, 16, 1, "char");
1220 builtin_java_type->builtin_float
1221 = arch_float_type (gdbarch, 32, "float", NULL);
1222 builtin_java_type->builtin_double
1223 = arch_float_type (gdbarch, 64, "double", NULL);
1224 builtin_java_type->builtin_void
1225 = arch_type (gdbarch, TYPE_CODE_VOID, 1, "void");
1226
1227 return builtin_java_type;
1228}
1229
1230static struct gdbarch_data *java_type_data;
1231
1232const struct builtin_java_type *
1233builtin_java_type (struct gdbarch *gdbarch)
1234{
1235 return gdbarch_data (gdbarch, java_type_data);
1236}
1237
1238void
1239_initialize_java_language (void)
1240{
cf7f2e2d
JM
1241 jv_dynamics_objfile_data_key
1242 = register_objfile_data_with_cleanup (NULL, jv_per_objfile_free);
a45ae5f8 1243 jv_dynamics_progspace_key = register_program_space_data ();
cf7f2e2d 1244
5796c8dc
SS
1245 java_type_data = gdbarch_data_register_post_init (build_java_types);
1246
1247 add_language (&java_language_defn);
1248}