projects / deliverable / binutils-gdb.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
PARAMS removal.
[deliverable/binutils-gdb.git] / gdb / jv-lang.c
CommitLineData
c906108c 1/* Java language support routines for GDB, the GNU debugger.
d9fcf2fb 2 Copyright 1997, 1998, 1999-2000 Free Software Foundation, Inc.
c906108c 3
c5aa993b 4 This file is part of GDB.
c906108c 5
c5aa993b
JM		 6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
c906108c 10
c5aa993b
JM		 11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
c906108c 15
c5aa993b
JM		 16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
c906108c
SS		 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 <ctype.h>
37
38struct type *java_int_type;
39struct type *java_byte_type;
40struct type *java_short_type;
41struct type *java_long_type;
42struct type *java_boolean_type;
43struct type *java_char_type;
44struct type *java_float_type;
45struct type *java_double_type;
46struct type *java_void_type;
47
392a587b
JM		 48/* Local functions */
49
a14ed312 50extern void _initialize_java_language (void);
392a587b 51
a14ed312
KB		 52static int java_demangled_signature_length (char *);
53static void java_demangled_signature_copy (char *, char *);
c906108c 54
a14ed312
KB		 55static struct symtab *get_java_class_symtab (void);
56static char *get_java_utf8_name (struct obstack *obstack, value_ptr name);
57static int java_class_is_primitive (value_ptr clas);
58static struct type *java_lookup_type (char *signature);
59static value_ptr java_value_string (char *ptr, int len);
392a587b 60
d9fcf2fb 61static void java_emit_char (int c, struct ui_file * stream, int quoter);
c906108c
SS		 62
63/* This objfile contains symtabs that have been dynamically created
64 to record dynamically loaded Java classes and dynamically
65 compiled java methods. */
66
67static struct objfile *dynamics_objfile = NULL;
68
a14ed312 69static struct type *java_link_class_type (struct type *, value_ptr);
c906108c
SS		 70
71static struct objfile *
72get_dynamics_objfile ()
73{
74 if (dynamics_objfile == NULL)
75 {
2df3850c 76 dynamics_objfile = allocate_objfile (NULL, 0);
c906108c
SS		 77 }
78 return dynamics_objfile;
79}
80
81#if 1
82/* symtab contains classes read from the inferior. */
83
84static struct symtab *class_symtab = NULL;
85
86/* Maximum number of class in class_symtab before relocation is needed. */
87
88static int class_symtab_space;
89
392a587b 90static struct symtab *
c906108c
SS		 91get_java_class_symtab ()
92{
93 if (class_symtab == NULL)
94 {
c5aa993b 95 struct objfile *objfile = get_dynamics_objfile ();
c906108c
SS		 96 struct blockvector *bv;
97 struct block *bl;
98 class_symtab = allocate_symtab ("<java-classes>", objfile);
99 class_symtab->language = language_java;
100 bv = (struct blockvector *)
101 obstack_alloc (&objfile->symbol_obstack, sizeof (struct blockvector));
102 BLOCKVECTOR_NBLOCKS (bv) = 1;
103 BLOCKVECTOR (class_symtab) = bv;
104
105 /* Allocate dummy STATIC_BLOCK. */
106 bl = (struct block *)
107 obstack_alloc (&objfile->symbol_obstack, sizeof (struct block));
108 BLOCK_NSYMS (bl) = 0;
109 BLOCK_START (bl) = 0;
110 BLOCK_END (bl) = 0;
111 BLOCK_FUNCTION (bl) = NULL;
112 BLOCK_SUPERBLOCK (bl) = NULL;
113 BLOCK_GCC_COMPILED (bl) = 0;
114 BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = bl;
115
116 /* Allocate GLOBAL_BLOCK. This has to be relocatable. */
117 class_symtab_space = 128;
118 bl = (struct block *)
119 mmalloc (objfile->md,
120 sizeof (struct block)
121 + ((class_symtab_space - 1) * sizeof (struct symbol *)));
122 *bl = *BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
123 BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
124 class_symtab->free_ptr = (char *) bl;
125 }
126 return class_symtab;
127}
128
129static void
130add_class_symtab_symbol (sym)
131 struct symbol *sym;
132{
133 struct symtab *symtab = get_java_class_symtab ();
134 struct blockvector *bv = BLOCKVECTOR (symtab);
135 struct block *bl = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
136 if (BLOCK_NSYMS (bl) >= class_symtab_space)
137 {
138 /* Need to re-allocate. */
139 class_symtab_space *= 2;
140 bl = (struct block *)
141 mrealloc (symtab->objfile->md, bl,
142 sizeof (struct block)
143 + ((class_symtab_space - 1) * sizeof (struct symbol *)));
144 class_symtab->free_ptr = (char *) bl;
145 BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
146 }
c5aa993b 147
c906108c
SS		 148 BLOCK_SYM (bl, BLOCK_NSYMS (bl)) = sym;
149 BLOCK_NSYMS (bl) = BLOCK_NSYMS (bl) + 1;
150}
151
a14ed312 152static struct symbol *add_class_symbol (struct type *type, CORE_ADDR addr);
c906108c
SS		 153
154static struct symbol *
155add_class_symbol (type, addr)
156 struct type *type;
157 CORE_ADDR addr;
158{
159 struct symbol *sym;
160 sym = (struct symbol *)
161 obstack_alloc (&dynamics_objfile->symbol_obstack, sizeof (struct symbol));
162 memset (sym, 0, sizeof (struct symbol));
163 SYMBOL_LANGUAGE (sym) = language_java;
164 SYMBOL_NAME (sym) = TYPE_TAG_NAME (type);
165 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
c5aa993b 166 /* SYMBOL_VALUE (sym) = valu; */
c906108c
SS		 167 SYMBOL_TYPE (sym) = type;
168 SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
169 SYMBOL_VALUE_ADDRESS (sym) = addr;
170 return sym;
171}
172#endif
173
174struct type *
175java_lookup_class (name)
176 char *name;
177{
178 struct symbol *sym;
179 sym = lookup_symbol (name, expression_context_block, STRUCT_NAMESPACE,
180 (int *) 0, (struct symtab **) NULL);
181 if (sym != NULL)
182 return SYMBOL_TYPE (sym);
183#if 0
184 CORE_ADDR addr;
185 if (called from parser)
186 {
187 call lookup_class (or similar) in inferior;
c5aa993b
JM		 188 if not
189 found:
c906108c
SS		 190 return NULL;
191 addr = found in inferior;
192 }
193 else
194 addr = 0;
195 struct type *type;
196 type = alloc_type (objfile);
197 TYPE_CODE (type) = TYPE_CODE_STRUCT;
198 INIT_CPLUS_SPECIFIC (type);
c5aa993b 199 TYPE_TAG_NAME (type) = obsavestring (name, strlen (name), &objfile->type_obstack);
c906108c
SS		 200 TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
201 TYPE ? = addr;
202 return type;
203#else
204 /* FIXME - should search inferior's symbol table. */
205 return NULL;
206#endif
207}
208
209/* Return a nul-terminated string (allocated on OBSTACK) for
210 a name given by NAME (which has type Utf8Const*). */
211
212char *
213get_java_utf8_name (obstack, name)
214 struct obstack *obstack;
215 value_ptr name;
216{
217 char *chrs;
218 value_ptr temp = name;
219 int name_length;
220 CORE_ADDR data_addr;
221 temp = value_struct_elt (&temp, NULL, "length", NULL, "structure");
222 name_length = (int) value_as_long (temp);
223 data_addr = VALUE_ADDRESS (temp) + VALUE_OFFSET (temp)
224 + TYPE_LENGTH (VALUE_TYPE (temp));
c5aa993b
JM		 225 chrs = obstack_alloc (obstack, name_length + 1);
226 chrs[name_length] = '\0';
d4b2399a 227 read_memory (data_addr, chrs, name_length);
c906108c
SS		 228 return chrs;
229}
230
231value_ptr
232java_class_from_object (obj_val)
233 value_ptr obj_val;
234{
235 /* This is all rather inefficient, since the offsets of vtable and
236 class are fixed. FIXME */
237 value_ptr vtable_val;
238
239 if (TYPE_CODE (VALUE_TYPE (obj_val)) == TYPE_CODE_PTR
240 && TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (obj_val))) == 0)
241 obj_val = value_at (get_java_object_type (),
242 value_as_pointer (obj_val), NULL);
243
244 vtable_val = value_struct_elt (&obj_val, NULL, "vtable", NULL, "structure");
245 return value_struct_elt (&vtable_val, NULL, "class", NULL, "structure");
246}
247
248/* Check if CLASS_IS_PRIMITIVE(value of clas): */
392a587b 249static int
c906108c
SS		 250java_class_is_primitive (clas)
251 value_ptr clas;
252{
253 value_ptr vtable = value_struct_elt (&clas, NULL, "vtable", NULL, "struct");
254 CORE_ADDR i = value_as_pointer (vtable);
255 return (int) (i & 0x7fffffff) == (int) 0x7fffffff;
256}
257
258/* Read a GCJ Class object, and generated a gdb (TYPE_CODE_STRUCT) type. */
259
260struct type *
261type_from_class (clas)
262 value_ptr clas;
263{
264 struct type *type;
265 char *name;
266 value_ptr temp;
267 struct objfile *objfile;
268 value_ptr utf8_name;
269 char *nptr;
270 CORE_ADDR addr;
271 struct block *bl;
272 int i;
273 int is_array = 0;
274
275 type = check_typedef (VALUE_TYPE (clas));
276 if (TYPE_CODE (type) == TYPE_CODE_PTR)
277 {
278 if (value_logical_not (clas))
279 return NULL;
280 clas = value_ind (clas);
281 }
282 addr = VALUE_ADDRESS (clas) + VALUE_OFFSET (clas);
283
284#if 0
285 get_java_class_symtab ();
286 bl = BLOCKVECTOR_BLOCK (BLOCKVECTOR (class_symtab), GLOBAL_BLOCK);
c5aa993b 287 for (i = BLOCK_NSYMS (bl); --i >= 0;)
c906108c
SS		 288 {
289 struct symbol *sym = BLOCK_SYM (bl, i);
290 if (SYMBOL_VALUE_ADDRESS (sym) == addr)
291 return SYMBOL_TYPE (sym);
292 }
293#endif
294
c5aa993b 295 objfile = get_dynamics_objfile ();
c906108c
SS		 296 if (java_class_is_primitive (clas))
297 {
298 value_ptr sig;
299 temp = clas;
300 sig = value_struct_elt (&temp, NULL, "method_count", NULL, "structure");
301 return java_primitive_type (value_as_long (sig));
302 }
303
304 /* Get Class name. */
305 /* if clasloader non-null, prepend loader address. FIXME */
306 temp = clas;
307 utf8_name = value_struct_elt (&temp, NULL, "name", NULL, "structure");
308 name = get_java_utf8_name (&objfile->type_obstack, utf8_name);
c5aa993b 309 for (nptr = name; *nptr != 0; nptr++)
c906108c
SS		 310 {
311 if (*nptr == '/')
312 *nptr = '.';
313 }
314
315 type = java_lookup_class (name);
316 if (type != NULL)
317 return type;
318
319 type = alloc_type (objfile);
320 TYPE_CODE (type) = TYPE_CODE_STRUCT;
321 INIT_CPLUS_SPECIFIC (type);
322
323 if (name[0] == '[')
324 {
325 char *signature = name;
326 int namelen = java_demangled_signature_length (signature);
327 if (namelen > strlen (name))
c5aa993b 328 name = obstack_alloc (&objfile->type_obstack, namelen + 1);
c906108c
SS		 329 java_demangled_signature_copy (name, signature);
330 name[namelen] = '\0';
331 is_array = 1;
332 temp = clas;
333 /* Set array element type. */
334 temp = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
335 VALUE_TYPE (temp) = lookup_pointer_type (VALUE_TYPE (clas));
336 TYPE_TARGET_TYPE (type) = type_from_class (temp);
337 }
338
339 ALLOCATE_CPLUS_STRUCT_TYPE (type);
340 TYPE_TAG_NAME (type) = name;
341
342 add_class_symtab_symbol (add_class_symbol (type, addr));
343 return java_link_class_type (type, clas);
344}
345
c5aa993b 346/* Fill in class TYPE with data from the CLAS value. */
c906108c
SS		 347
348struct type *
349java_link_class_type (type, clas)
350 struct type *type;
351 value_ptr clas;
352{
353 value_ptr temp;
354 char *unqualified_name;
355 char *name = TYPE_TAG_NAME (type);
356 int ninterfaces, nfields, nmethods;
357 int type_is_object = 0;
358 struct fn_field *fn_fields;
359 struct fn_fieldlist *fn_fieldlists;
360 value_ptr fields, field, method, methods;
361 int i, j;
c5aa993b 362 struct objfile *objfile = get_dynamics_objfile ();
c906108c
SS		 363 struct type *tsuper;
364
365 unqualified_name = strrchr (name, '.');
366 if (unqualified_name == NULL)
367 unqualified_name = name;
368
369 temp = clas;
370 temp = value_struct_elt (&temp, NULL, "superclass", NULL, "structure");
371 if (name != NULL && strcmp (name, "java.lang.Object") == 0)
372 {
373 tsuper = get_java_object_type ();
374 if (tsuper && TYPE_CODE (tsuper) == TYPE_CODE_PTR)
375 tsuper = TYPE_TARGET_TYPE (tsuper);
376 type_is_object = 1;
377 }
378 else
379 tsuper = type_from_class (temp);
380
381#if 1
382 ninterfaces = 0;
383#else
384 temp = clas;
385 ninterfaces = value_as_long (value_struct_elt (&temp, NULL, "interface_len", NULL, "structure"));
386#endif
387 TYPE_N_BASECLASSES (type) = (tsuper == NULL ? 0 : 1) + ninterfaces;
388 temp = clas;
389 nfields = value_as_long (value_struct_elt (&temp, NULL, "field_count", NULL, "structure"));
390 nfields += TYPE_N_BASECLASSES (type);
c5aa993b 391 nfields++; /* Add one for dummy "class" field. */
c906108c
SS		 392 TYPE_NFIELDS (type) = nfields;
393 TYPE_FIELDS (type) = (struct field *)
394 TYPE_ALLOC (type, sizeof (struct field) * nfields);
395
396 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
397
398 TYPE_FIELD_PRIVATE_BITS (type) =
399 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
400 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
401
402 TYPE_FIELD_PROTECTED_BITS (type) =
403 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
404 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
405
406 TYPE_FIELD_IGNORE_BITS (type) =
407 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
408 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
409
410 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
411 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
412 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
413
414 if (tsuper != NULL)
415 {
416 TYPE_BASECLASS (type, 0) = tsuper;
417 if (type_is_object)
418 SET_TYPE_FIELD_PRIVATE (type, 0);
419 }
420
421 i = strlen (name);
c5aa993b 422 if (i > 2 && name[i - 1] == ']' && tsuper != NULL)
c906108c
SS		 423 {
424 /* FIXME */
c5aa993b 425 TYPE_LENGTH (type) = TYPE_LENGTH (tsuper) + 4; /* size with "length" */
c906108c
SS		 426 }
427 else
428 {
429 temp = clas;
430 temp = value_struct_elt (&temp, NULL, "size_in_bytes", NULL, "structure");
431 TYPE_LENGTH (type) = value_as_long (temp);
432 }
433
434 fields = NULL;
c5aa993b 435 nfields--; /* First set up dummy "class" field. */
c906108c
SS		 436 SET_FIELD_PHYSADDR (TYPE_FIELD (type, nfields),
437 VALUE_ADDRESS (clas) + VALUE_OFFSET (clas));
438 TYPE_FIELD_NAME (type, nfields) = "class";
439 TYPE_FIELD_TYPE (type, nfields) = VALUE_TYPE (clas);
440 SET_TYPE_FIELD_PRIVATE (type, nfields);
c5aa993b
JM		 441
442 for (i = TYPE_N_BASECLASSES (type); i < nfields; i++)
c906108c
SS		 443 {
444 int accflags;
445 int boffset;
446 if (fields == NULL)
447 {
448 temp = clas;
449 fields = value_struct_elt (&temp, NULL, "fields", NULL, "structure");
450 field = value_ind (fields);
451 }
452 else
c5aa993b 453 { /* Re-use field value for next field. */
c906108c
SS		 454 VALUE_ADDRESS (field) += TYPE_LENGTH (VALUE_TYPE (field));
455 VALUE_LAZY (field) = 1;
456 }
457 temp = field;
458 temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
459 TYPE_FIELD_NAME (type, i) =
460 get_java_utf8_name (&objfile->type_obstack, temp);
461 temp = field;
462 accflags = value_as_long (value_struct_elt (&temp, NULL, "accflags",
463 NULL, "structure"));
464 temp = field;
465 temp = value_struct_elt (&temp, NULL, "info", NULL, "structure");
466 boffset = value_as_long (value_struct_elt (&temp, NULL, "boffset",
c5aa993b
JM		 467 NULL, "structure"));
468 if (accflags & 0x0001) /* public access */
c906108c
SS		 469 {
470 /* ??? */
471 }
c5aa993b 472 if (accflags & 0x0002) /* private access */
c906108c
SS		 473 {
474 SET_TYPE_FIELD_PRIVATE (type, i);
475 }
c5aa993b 476 if (accflags & 0x0004) /* protected access */
c906108c
SS		 477 {
478 SET_TYPE_FIELD_PROTECTED (type, i);
479 }
c5aa993b
JM		 480 if (accflags & 0x0008) /* ACC_STATIC */
481 SET_FIELD_PHYSADDR (TYPE_FIELD (type, i), boffset);
c906108c
SS		 482 else
483 TYPE_FIELD_BITPOS (type, i) = 8 * boffset;
c5aa993b 484 if (accflags & 0x8000) /* FIELD_UNRESOLVED_FLAG */
c906108c 485 {
c5aa993b 486 TYPE_FIELD_TYPE (type, i) = get_java_object_type (); /* FIXME */
c906108c
SS		 487 }
488 else
489 {
490 struct type *ftype;
491 temp = field;
492 temp = value_struct_elt (&temp, NULL, "type", NULL, "structure");
493 ftype = type_from_class (temp);
494 if (TYPE_CODE (ftype) == TYPE_CODE_STRUCT)
495 ftype = lookup_pointer_type (ftype);
496 TYPE_FIELD_TYPE (type, i) = ftype;
497 }
498 }
499
500 temp = clas;
501 nmethods = value_as_long (value_struct_elt (&temp, NULL, "method_count",
502 NULL, "structure"));
503 TYPE_NFN_FIELDS_TOTAL (type) = nmethods;
504 j = nmethods * sizeof (struct fn_field);
c5aa993b 505 fn_fields = (struct fn_field *)
c906108c
SS		 506 obstack_alloc (&dynamics_objfile->symbol_obstack, j);
507 memset (fn_fields, 0, j);
c5aa993b 508 fn_fieldlists = (struct fn_fieldlist *)
c906108c
SS		 509 alloca (nmethods * sizeof (struct fn_fieldlist));
510
511 methods = NULL;
c5aa993b 512 for (i = 0; i < nmethods; i++)
c906108c
SS		 513 {
514 char *mname;
515 int k;
516 if (methods == NULL)
517 {
518 temp = clas;
519 methods = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
520 method = value_ind (methods);
521 }
522 else
c5aa993b 523 { /* Re-use method value for next method. */
c906108c
SS		 524 VALUE_ADDRESS (method) += TYPE_LENGTH (VALUE_TYPE (method));
525 VALUE_LAZY (method) = 1;
526 }
527
528 /* Get method name. */
529 temp = method;
530 temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
531 mname = get_java_utf8_name (&objfile->type_obstack, temp);
532 if (strcmp (mname, "<init>") == 0)
533 mname = unqualified_name;
534
535 /* Check for an existing method with the same name.
536 * This makes building the fn_fieldslists an O(nmethods**2)
537 * operation. That could be using hashing, but I doubt it
538 * is worth it. Note that we do maintain the order of methods
539 * in the inferior's Method table (as long as that is grouped
540 * by method name), which I think is desirable. --PB */
c5aa993b 541 for (k = 0, j = TYPE_NFN_FIELDS (type);;)
c906108c
SS		 542 {
543 if (--j < 0)
c5aa993b
JM		 544 { /* No match - new method name. */
545 j = TYPE_NFN_FIELDS (type)++;
c906108c
SS		 546 fn_fieldlists[j].name = mname;
547 fn_fieldlists[j].length = 1;
548 fn_fieldlists[j].fn_fields = &fn_fields[i];
549 k = i;
550 break;
551 }
552 if (strcmp (mname, fn_fieldlists[j].name) == 0)
c5aa993b 553 { /* Found an existing method with the same name. */
c906108c
SS		 554 int l;
555 if (mname != unqualified_name)
556 obstack_free (&objfile->type_obstack, mname);
557 mname = fn_fieldlists[j].name;
558 fn_fieldlists[j].length++;
c5aa993b 559 k = i - k; /* Index of new slot. */
c906108c 560 /* Shift intervening fn_fields (between k and i) down. */
c5aa993b
JM		 561 for (l = i; l > k; l--)
562 fn_fields[l] = fn_fields[l - 1];
563 for (l = TYPE_NFN_FIELDS (type); --l > j;)
c906108c
SS		 564 fn_fieldlists[l].fn_fields++;
565 break;
566 }
567 k += fn_fieldlists[j].length;
568 }
569 fn_fields[k].physname = "";
570 fn_fields[k].is_stub = 1;
c5aa993b 571 fn_fields[k].type = make_function_type (java_void_type, NULL); /* FIXME */
c906108c
SS		 572 TYPE_CODE (fn_fields[k].type) = TYPE_CODE_METHOD;
573 }
574
c5aa993b
JM		 575 j = TYPE_NFN_FIELDS (type) * sizeof (struct fn_fieldlist);
576 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
c906108c
SS		 577 obstack_alloc (&dynamics_objfile->symbol_obstack, j);
578 memcpy (TYPE_FN_FIELDLISTS (type), fn_fieldlists, j);
c5aa993b 579
c906108c
SS		 580 return type;
581}
582
583static struct type *java_object_type;
584
585struct type *
586get_java_object_type ()
587{
588 if (java_object_type == NULL)
589 {
590 struct symbol *sym;
591 sym = lookup_symbol ("java.lang.Object", NULL, STRUCT_NAMESPACE,
592 (int *) 0, (struct symtab **) NULL);
593 if (sym == NULL)
594 error ("cannot find java.lang.Object");
595 java_object_type = SYMBOL_TYPE (sym);
596 }
597 return java_object_type;
598}
599
600int
601get_java_object_header_size ()
602{
603 struct type *objtype = get_java_object_type ();
604 if (objtype == NULL)
605 return (2 * TARGET_PTR_BIT / TARGET_CHAR_BIT);
606 else
607 return TYPE_LENGTH (objtype);
608}
609
610int
611is_object_type (type)
612 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));
618 char *name;
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;
c5aa993b 626 name = TYPE_NFIELDS (ttype) > 0 ? TYPE_FIELD_NAME (ttype, 0) : (char *) 0;
c906108c
SS		 627 if (name != NULL && strcmp (name, "vtable") == 0)
628 {
629 if (java_object_type == NULL)
630 java_object_type = type;
631 return 1;
632 }
633 }
634 return 0;
635}
636
637struct type *
638java_primitive_type (signature)
639 int signature;
640{
641 switch (signature)
642 {
c5aa993b
JM		 643 case 'B':
644 return java_byte_type;
645 case 'S':
646 return java_short_type;
647 case 'I':
648 return java_int_type;
649 case 'J':
650 return java_long_type;
651 case 'Z':
652 return java_boolean_type;
653 case 'C':
654 return java_char_type;
655 case 'F':
656 return java_float_type;
657 case 'D':
658 return java_double_type;
659 case 'V':
660 return java_void_type;
c906108c
SS		 661 }
662 error ("unknown signature '%c' for primitive type", (char) signature);
663}
664
665/* If name[0 .. namelen-1] is the name of a primitive Java type,
666 return that type. Otherwise, return NULL. */
667
668struct type *
669java_primitive_type_from_name (name, namelen)
c5aa993b 670 char *name;
c906108c
SS		 671 int namelen;
672{
673 switch (name[0])
674 {
675 case 'b':
676 if (namelen == 4 && memcmp (name, "byte", 4) == 0)
677 return java_byte_type;
678 if (namelen == 7 && memcmp (name, "boolean", 7) == 0)
679 return java_boolean_type;
680 break;
681 case 'c':
682 if (namelen == 4 && memcmp (name, "char", 4) == 0)
683 return java_char_type;
684 case 'd':
685 if (namelen == 6 && memcmp (name, "double", 6) == 0)
686 return java_double_type;
687 break;
688 case 'f':
689 if (namelen == 5 && memcmp (name, "float", 5) == 0)
690 return java_float_type;
691 break;
692 case 'i':
693 if (namelen == 3 && memcmp (name, "int", 3) == 0)
694 return java_int_type;
695 break;
696 case 'l':
697 if (namelen == 4 && memcmp (name, "long", 4) == 0)
698 return java_long_type;
699 break;
700 case 's':
701 if (namelen == 5 && memcmp (name, "short", 5) == 0)
702 return java_short_type;
703 break;
704 case 'v':
705 if (namelen == 4 && memcmp (name, "void", 4) == 0)
706 return java_void_type;
707 break;
708 }
709 return NULL;
710}
711
712/* Return the length (in bytes) of demangled name of the Java type
713 signature string SIGNATURE. */
714
715static int
716java_demangled_signature_length (signature)
717 char *signature;
718{
719 int array = 0;
c5aa993b
JM		 720 for (; *signature == '['; signature++)
721 array += 2; /* Two chars for "[]". */
c906108c
SS		 722 switch (signature[0])
723 {
724 case 'L':
725 /* Subtract 2 for 'L' and ';'. */
726 return strlen (signature) - 2 + array;
727 default:
728 return strlen (TYPE_NAME (java_primitive_type (signature[0]))) + array;
729 }
730}
731
732/* Demangle the Java type signature SIGNATURE, leaving the result in RESULT. */
733
734static void
735java_demangled_signature_copy (result, signature)
736 char *result;
737 char *signature;
738{
739 int array = 0;
740 char *ptr;
741 int i;
742 while (*signature == '[')
743 {
744 array++;
745 signature++;
746 }
747 switch (signature[0])
748 {
749 case 'L':
750 /* Subtract 2 for 'L' and ';', but add 1 for final nul. */
751 signature++;
752 ptr = result;
c5aa993b 753 for (; *signature != ';' && *signature != '\0'; signature++)
c906108c
SS		 754 {
755 if (*signature == '/')
756 *ptr++ = '.';
757 else
758 *ptr++ = *signature;
759 }
760 break;
761 default:
762 ptr = TYPE_NAME (java_primitive_type (signature[0]));
763 i = strlen (ptr);
764 strcpy (result, ptr);
765 ptr = result + i;
766 break;
767 }
768 while (--array >= 0)
769 {
770 *ptr++ = '[';
771 *ptr++ = ']';
772 }
773}
774
775/* Return the demangled name of the Java type signature string SIGNATURE,
776 as a freshly allocated copy. */
777
778char *
779java_demangle_type_signature (signature)
780 char *signature;
781{
782 int length = java_demangled_signature_length (signature);
783 char *result = xmalloc (length + 1);
784 java_demangled_signature_copy (result, signature);
785 result[length] = '\0';
786 return result;
787}
788
789struct type *
790java_lookup_type (signature)
791 char *signature;
792{
793 switch (signature[0])
794 {
795 case 'L':
796 case '[':
797 error ("java_lookup_type not fully implemented");
798 default:
799 return java_primitive_type (signature[0]);
800 }
801}
802
803/* Return the type of TYPE followed by DIMS pairs of [ ].
804 If DIMS == 0, TYPE is returned. */
805
806struct type *
807java_array_type (type, dims)
808 struct type *type;
809 int dims;
810{
811 struct type *range_type;
812
813 while (dims-- > 0)
814 {
815 range_type = create_range_type (NULL, builtin_type_int, 0, 0);
816 /* FIXME This is bogus! Java arrays are not gdb arrays! */
817 type = create_array_type (NULL, type, range_type);
818 }
819
820 return type;
821}
822
823/* Create a Java string in the inferior from a (Utf8) literal. */
824
392a587b 825static value_ptr
c906108c
SS		 826java_value_string (ptr, len)
827 char *ptr;
828 int len;
829{
c5aa993b 830 error ("not implemented - java_value_string"); /* FIXME */
c906108c
SS		 831}
832
833/* Print the character C on STREAM as part of the contents of a literal
834 string whose delimiter is QUOTER. Note that that format for printing
835 characters and strings is language specific. */
836
837static void
838java_emit_char (c, stream, quoter)
839 int c;
d9fcf2fb 840 struct ui_file *stream;
c906108c
SS		 841 int quoter;
842{
843 switch (c)
844 {
845 case '\\':
846 case '\'':
847 fprintf_filtered (stream, "\\%c", c);
848 break;
849 case '\b':
850 fputs_filtered ("\\b", stream);
851 break;
852 case '\t':
853 fputs_filtered ("\\t", stream);
854 break;
855 case '\n':
856 fputs_filtered ("\\n", stream);
857 break;
858 case '\f':
859 fputs_filtered ("\\f", stream);
860 break;
861 case '\r':
862 fputs_filtered ("\\r", stream);
863 break;
864 default:
865 if (isprint (c))
866 fputc_filtered (c, stream);
867 else
868 fprintf_filtered (stream, "\\u%.4x", (unsigned int) c);
869 break;
870 }
871}
872
873static value_ptr
874evaluate_subexp_java (expect_type, exp, pos, noside)
875 struct type *expect_type;
876 register struct expression *exp;
877 register int *pos;
878 enum noside noside;
879{
880 int pc = *pos;
881 int i;
882 char *name;
883 enum exp_opcode op = exp->elts[*pos].opcode;
884 value_ptr arg1, arg2;
885 struct type *type;
886 switch (op)
887 {
888 case UNOP_IND:
889 if (noside == EVAL_SKIP)
890 goto standard;
891 (*pos)++;
892 arg1 = evaluate_subexp_java (NULL_TYPE, exp, pos, EVAL_NORMAL);
893 if (is_object_type (VALUE_TYPE (arg1)))
894 {
895 struct type *type;
896
897 type = type_from_class (java_class_from_object (arg1));
898 arg1 = value_cast (lookup_pointer_type (type), arg1);
899 }
900 if (noside == EVAL_SKIP)
901 goto nosideret;
902 return value_ind (arg1);
903
904 case BINOP_SUBSCRIPT:
905 (*pos)++;
906 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
907 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
908 if (noside == EVAL_SKIP)
909 goto nosideret;
910 /* If the user attempts to subscript something that is not an
c5aa993b
JM		 911 array or pointer type (like a plain int variable for example),
912 then report this as an error. */
913
c906108c
SS		 914 COERCE_REF (arg1);
915 type = check_typedef (VALUE_TYPE (arg1));
916 if (TYPE_CODE (type) == TYPE_CODE_PTR)
917 type = check_typedef (TYPE_TARGET_TYPE (type));
918 name = TYPE_NAME (type);
919 if (name == NULL)
920 name = TYPE_TAG_NAME (type);
921 i = name == NULL ? 0 : strlen (name);
922 if (TYPE_CODE (type) == TYPE_CODE_STRUCT
c5aa993b 923 && i > 2 && name[i - 1] == ']')
c906108c
SS		 924 {
925 CORE_ADDR address;
926 long length, index;
927 struct type *el_type;
928 char buf4[4];
929
c5aa993b 930 value_ptr clas = java_class_from_object (arg1);
c906108c
SS		 931 value_ptr temp = clas;
932 /* Get CLASS_ELEMENT_TYPE of the array type. */
933 temp = value_struct_elt (&temp, NULL, "methods",
c5aa993b 934 NULL, "structure");
c906108c
SS		 935 VALUE_TYPE (temp) = VALUE_TYPE (clas);
936 el_type = type_from_class (temp);
937 if (TYPE_CODE (el_type) == TYPE_CODE_STRUCT)
938 el_type = lookup_pointer_type (el_type);
939
940 if (noside == EVAL_AVOID_SIDE_EFFECTS)
941 return value_zero (el_type, VALUE_LVAL (arg1));
942 address = value_as_pointer (arg1);
943 address += JAVA_OBJECT_SIZE;
944 read_memory (address, buf4, 4);
945 length = (long) extract_signed_integer (buf4, 4);
946 index = (long) value_as_long (arg2);
947 if (index >= length || index < 0)
948 error ("array index (%ld) out of bounds (length: %ld)",
949 index, length);
950 address = (address + 4) + index * TYPE_LENGTH (el_type);
951 return value_at (el_type, address, NULL);
952 }
953 else if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
954 {
955 if (noside == EVAL_AVOID_SIDE_EFFECTS)
956 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
957 else
958 return value_subscript (arg1, arg2);
959 }
960 if (name)
961 error ("cannot subscript something of type `%s'", name);
962 else
963 error ("cannot subscript requested type");
964
965 case OP_STRING:
966 (*pos)++;
967 i = longest_to_int (exp->elts[pc + 1].longconst);
968 (*pos) += 3 + BYTES_TO_EXP_ELEM (i + 1);
969 if (noside == EVAL_SKIP)
970 goto nosideret;
971 return java_value_string (&exp->elts[pc + 2].string, i);
972
973 case STRUCTOP_STRUCT:
974 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
975 /* Convert object field (such as TYPE.class) to reference. */
976 if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_STRUCT)
977 arg1 = value_addr (arg1);
978 return arg1;
979 default:
980 break;
981 }
982standard:
983 return evaluate_subexp_standard (expect_type, exp, pos, noside);
c5aa993b 984nosideret:
c906108c
SS		 985 return value_from_longest (builtin_type_long, (LONGEST) 1);
986}
987
988static struct type *
989java_create_fundamental_type (objfile, typeid)
990 struct objfile *objfile;
991 int typeid;
992{
993 switch (typeid)
994 {
c5aa993b
JM		 995 case FT_VOID:
996 return java_void_type;
997 case FT_BOOLEAN:
998 return java_boolean_type;
999 case FT_CHAR:
1000 return java_char_type;
1001 case FT_FLOAT:
1002 return java_float_type;
1003 case FT_DBL_PREC_FLOAT:
1004 return java_double_type;
1005 case FT_BYTE:
1006 case FT_SIGNED_CHAR:
1007 return java_byte_type;
1008 case FT_SHORT:
1009 case FT_SIGNED_SHORT:
1010 return java_short_type;
1011 case FT_INTEGER:
1012 case FT_SIGNED_INTEGER:
1013 return java_int_type;
1014 case FT_LONG:
1015 case FT_SIGNED_LONG:
1016 return java_long_type;
c906108c
SS		 1017 }
1018 return c_create_fundamental_type (objfile, typeid);
1019}
1020
1021/* Table mapping opcodes into strings for printing operators
1022 and precedences of the operators. */
1023
1024const struct op_print java_op_print_tab[] =
c5aa993b
JM		 1025{
1026 {",", BINOP_COMMA, PREC_COMMA, 0},
1027 {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
1028 {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
1029 {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
1030 {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
1031 {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
1032 {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
1033 {"==", BINOP_EQUAL, PREC_EQUAL, 0},
1034 {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
1035 {"<=", BINOP_LEQ, PREC_ORDER, 0},
1036 {">=", BINOP_GEQ, PREC_ORDER, 0},
1037 {">", BINOP_GTR, PREC_ORDER, 0},
1038 {"<", BINOP_LESS, PREC_ORDER, 0},
1039 {">>", BINOP_RSH, PREC_SHIFT, 0},
1040 {"<<", BINOP_LSH, PREC_SHIFT, 0},
c906108c 1041#if 0
c5aa993b 1042 {">>>", BINOP_ ? ? ?, PREC_SHIFT, 0},
c906108c 1043#endif
c5aa993b
JM		 1044 {"+", BINOP_ADD, PREC_ADD, 0},
1045 {"-", BINOP_SUB, PREC_ADD, 0},
1046 {"*", BINOP_MUL, PREC_MUL, 0},
1047 {"/", BINOP_DIV, PREC_MUL, 0},
1048 {"%", BINOP_REM, PREC_MUL, 0},
1049 {"-", UNOP_NEG, PREC_PREFIX, 0},
1050 {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
1051 {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
1052 {"*", UNOP_IND, PREC_PREFIX, 0},
c906108c 1053#if 0
c5aa993b 1054 {"instanceof", ? ? ?, ? ? ?, 0},
c906108c 1055#endif
c5aa993b
JM		 1056 {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
1057 {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
1058 {NULL, 0, 0, 0}
c906108c
SS		 1059};
1060
c5aa993b
JM		 1061const struct language_defn java_language_defn =
1062{
1063 "java", /* Language name */
c906108c
SS		 1064 language_java,
1065 c_builtin_types,
1066 range_check_off,
1067 type_check_off,
1068 java_parse,
1069 java_error,
1070 evaluate_subexp_java,
1071 c_printchar, /* Print a character constant */
1072 c_printstr, /* Function to print string constant */
1073 java_emit_char, /* Function to print a single character */
1074 java_create_fundamental_type, /* Create fundamental type in this language */
1075 java_print_type, /* Print a type using appropriate syntax */
1076 java_val_print, /* Print a value using appropriate syntax */
1077 java_value_print, /* Print a top-level value */
c5aa993b
JM		 1078 {"", "", "", ""}, /* Binary format info */
1079 {"0%lo", "0", "o", ""}, /* Octal format info */
1080 {"%ld", "", "d", ""}, /* Decimal format info */
1081 {"0x%lx", "0x", "x", ""}, /* Hex format info */
c906108c
SS		 1082 java_op_print_tab, /* expression operators for printing */
1083 0, /* not c-style arrays */
1084 0, /* String lower bound */
c5aa993b 1085 &builtin_type_char, /* Type of string elements */
c906108c
SS		 1086 LANG_MAGIC
1087};
1088
1089void
1090_initialize_java_language ()
1091{
1092
c5aa993b
JM		 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);
c906108c
SS		 1102
1103 add_language (&java_language_defn);
1104}
1105
1106/* Cleanup code that should be run on every "run".
1107 We should use make_run_cleanup to have this be called.
1108 But will that mess up values in value histry? FIXME */
1109
a14ed312 1110extern void java_rerun_cleanup (void);
392a587b
JM		 1111void
1112java_rerun_cleanup ()
c906108c
SS		 1113{
1114 if (class_symtab != NULL)
1115 {
c5aa993b 1116 free_symtab (class_symtab); /* ??? */
c906108c
SS		 1117 class_symtab = NULL;
1118 }
1119 if (dynamics_objfile != NULL)
1120 {
1121 free_objfile (dynamics_objfile);
1122 dynamics_objfile = NULL;
1123 }
1124
1125 java_object_type = NULL;
1126}
GDB Binutils - Deliverables
This page took 0.106724 seconds and 4 git commands to generate.