1 /* Java language support routines for GDB, the GNU debugger. 2 3 Copyright (C) 1997, 1998, 1999, 2000, 2003, 2004, 2005, 2007, 2008, 2009, 4 2010, 2011 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 /* Local functions */ 43 44 extern void _initialize_java_language (void); 45 46 static int java_demangled_signature_length (char *); 47 static void java_demangled_signature_copy (char *, char *); 48 49 static struct symtab *get_java_class_symtab (struct gdbarch *gdbarch); 50 static char *get_java_utf8_name (struct obstack *obstack, struct value *name); 51 static int java_class_is_primitive (struct value *clas); 52 static struct value *java_value_string (char *ptr, int len); 53 54 static void java_emit_char (int c, struct type *type, 55 struct ui_file * stream, int quoter); 56 57 static char *java_class_name_from_physname (const char *physname); 58 59 static const struct objfile_data *jv_dynamics_objfile_data_key; 60 static const struct objfile_data *jv_type_objfile_data_key; 61 62 /* This objfile contains symtabs that have been dynamically created 63 to record dynamically loaded Java classes and dynamically 64 compiled java methods. */ 65 66 static struct objfile *dynamics_objfile = NULL; 67 68 /* symtab contains classes read from the inferior. */ 69 70 static struct symtab *class_symtab = NULL; 71 72 static struct type *java_link_class_type (struct gdbarch *, 73 struct type *, struct value *); 74 75 /* A function called when the dynamics_objfile is freed. We use this 76 to clean up some internal state. */ 77 static void 78 jv_per_objfile_free (struct objfile *objfile, void *ignore) 79 { 80 gdb_assert (objfile == dynamics_objfile); 81 /* Clean up all our cached state. These objects are all allocated 82 in the dynamics_objfile, so we don't need to actually free 83 anything. */ 84 dynamics_objfile = NULL; 85 class_symtab = NULL; 86 } 87 88 /* FIXME: carlton/2003-02-04: This is the main or only caller of 89 allocate_objfile with first argument NULL; as a result, this code 90 breaks every so often. Somebody should write a test case that 91 exercises GDB in various ways (e.g. something involving loading a 92 dynamic library) after this code has been called. */ 93 94 static struct objfile * 95 get_dynamics_objfile (struct gdbarch *gdbarch) 96 { 97 if (dynamics_objfile == NULL) 98 { 99 /* Mark it as shared so that it is cleared when the inferior is 100 re-run. */ 101 dynamics_objfile = allocate_objfile (NULL, OBJF_SHARED); 102 dynamics_objfile->gdbarch = gdbarch; 103 /* We don't have any data to store, but this lets us get a 104 notification when the objfile is destroyed. Since we have to 105 store a non-NULL value, we just pick something arbitrary and 106 safe. */ 107 set_objfile_data (dynamics_objfile, jv_dynamics_objfile_data_key, 108 &dynamics_objfile); 109 } 110 return dynamics_objfile; 111 } 112 113 static void free_class_block (struct symtab *symtab); 114 115 static struct symtab * 116 get_java_class_symtab (struct gdbarch *gdbarch) 117 { 118 if (class_symtab == NULL) 119 { 120 struct objfile *objfile = get_dynamics_objfile (gdbarch); 121 struct blockvector *bv; 122 struct block *bl; 123 124 class_symtab = allocate_symtab ("<java-classes>", objfile); 125 class_symtab->language = language_java; 126 bv = (struct blockvector *) 127 obstack_alloc (&objfile->objfile_obstack, 128 sizeof (struct blockvector) + sizeof (struct block *)); 129 BLOCKVECTOR_NBLOCKS (bv) = 1; 130 BLOCKVECTOR (class_symtab) = bv; 131 132 /* Allocate dummy STATIC_BLOCK. */ 133 bl = allocate_block (&objfile->objfile_obstack); 134 BLOCK_DICT (bl) = dict_create_linear (&objfile->objfile_obstack, 135 NULL); 136 BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = bl; 137 138 /* Allocate GLOBAL_BLOCK. */ 139 bl = allocate_block (&objfile->objfile_obstack); 140 BLOCK_DICT (bl) = dict_create_hashed_expandable (); 141 BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl; 142 class_symtab->free_func = free_class_block; 143 } 144 return class_symtab; 145 } 146 147 static void 148 add_class_symtab_symbol (struct symbol *sym) 149 { 150 struct symtab *symtab 151 = get_java_class_symtab (get_objfile_arch (SYMBOL_SYMTAB (sym)->objfile)); 152 struct blockvector *bv = BLOCKVECTOR (symtab); 153 154 dict_add_symbol (BLOCK_DICT (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)), sym); 155 } 156 157 static struct symbol * 158 add_class_symbol (struct type *type, CORE_ADDR addr) 159 { 160 struct symbol *sym; 161 162 sym = (struct symbol *) 163 obstack_alloc (&dynamics_objfile->objfile_obstack, sizeof (struct symbol)); 164 memset (sym, 0, sizeof (struct symbol)); 165 SYMBOL_SET_LANGUAGE (sym, language_java); 166 SYMBOL_SET_LINKAGE_NAME (sym, TYPE_TAG_NAME (type)); 167 SYMBOL_CLASS (sym) = LOC_TYPEDEF; 168 /* SYMBOL_VALUE (sym) = valu; */ 169 SYMBOL_TYPE (sym) = type; 170 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; 171 SYMBOL_VALUE_ADDRESS (sym) = addr; 172 return sym; 173 } 174 175 /* Free the dynamic symbols block. */ 176 static void 177 free_class_block (struct symtab *symtab) 178 { 179 struct blockvector *bv = BLOCKVECTOR (symtab); 180 struct block *bl = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); 181 182 dict_free (BLOCK_DICT (bl)); 183 } 184 185 struct type * 186 java_lookup_class (char *name) 187 { 188 struct symbol *sym; 189 190 sym = lookup_symbol (name, expression_context_block, STRUCT_DOMAIN, NULL); 191 if (sym != NULL) 192 return SYMBOL_TYPE (sym); 193 /* FIXME - should search inferior's symbol table. */ 194 return NULL; 195 } 196 197 /* Return a nul-terminated string (allocated on OBSTACK) for 198 a name given by NAME (which has type Utf8Const*). */ 199 200 char * 201 get_java_utf8_name (struct obstack *obstack, struct value *name) 202 { 203 char *chrs; 204 struct value *temp = name; 205 int name_length; 206 CORE_ADDR data_addr; 207 208 temp = value_struct_elt (&temp, NULL, "length", NULL, "structure"); 209 name_length = (int) value_as_long (temp); 210 data_addr = value_address (temp) + TYPE_LENGTH (value_type (temp)); 211 chrs = obstack_alloc (obstack, name_length + 1); 212 chrs[name_length] = '\0'; 213 read_memory (data_addr, (gdb_byte *) chrs, name_length); 214 return chrs; 215 } 216 217 struct value * 218 java_class_from_object (struct value *obj_val) 219 { 220 /* This is all rather inefficient, since the offsets of vtable and 221 class are fixed. FIXME */ 222 struct value *vtable_val; 223 224 if (TYPE_CODE (value_type (obj_val)) == TYPE_CODE_PTR 225 && TYPE_LENGTH (TYPE_TARGET_TYPE (value_type (obj_val))) == 0) 226 obj_val = value_at (get_java_object_type (), 227 value_as_address (obj_val)); 228 229 vtable_val = value_struct_elt (&obj_val, NULL, "vtable", NULL, "structure"); 230 return value_struct_elt (&vtable_val, NULL, "class", NULL, "structure"); 231 } 232 233 /* Check if CLASS_IS_PRIMITIVE(value of clas): */ 234 static int 235 java_class_is_primitive (struct value *clas) 236 { 237 struct value *vtable = value_struct_elt (&clas, NULL, "vtable", 238 NULL, "struct"); 239 CORE_ADDR i = value_as_address (vtable); 240 241 return (int) (i & 0x7fffffff) == (int) 0x7fffffff; 242 } 243 244 /* Read a GCJ Class object, and generated a gdb (TYPE_CODE_STRUCT) type. */ 245 246 struct type * 247 type_from_class (struct gdbarch *gdbarch, struct value *clas) 248 { 249 struct type *type; 250 char *name; 251 struct value *temp; 252 struct objfile *objfile; 253 struct value *utf8_name; 254 char *nptr; 255 CORE_ADDR addr; 256 int is_array = 0; 257 258 type = check_typedef (value_type (clas)); 259 if (TYPE_CODE (type) == TYPE_CODE_PTR) 260 { 261 if (value_logical_not (clas)) 262 return NULL; 263 clas = value_ind (clas); 264 } 265 addr = value_address (clas); 266 267 objfile = get_dynamics_objfile (gdbarch); 268 if (java_class_is_primitive (clas)) 269 { 270 struct value *sig; 271 272 temp = clas; 273 sig = value_struct_elt (&temp, NULL, "method_count", NULL, "structure"); 274 return java_primitive_type (gdbarch, value_as_long (sig)); 275 } 276 277 /* Get Class name. */ 278 /* If clasloader non-null, prepend loader address. FIXME */ 279 temp = clas; 280 utf8_name = value_struct_elt (&temp, NULL, "name", NULL, "structure"); 281 name = get_java_utf8_name (&objfile->objfile_obstack, utf8_name); 282 for (nptr = name; *nptr != 0; nptr++) 283 { 284 if (*nptr == '/') 285 *nptr = '.'; 286 } 287 288 type = java_lookup_class (name); 289 if (type != NULL) 290 return type; 291 292 type = alloc_type (objfile); 293 TYPE_CODE (type) = TYPE_CODE_STRUCT; 294 INIT_CPLUS_SPECIFIC (type); 295 296 if (name[0] == '[') 297 { 298 char *signature = name; 299 int namelen = java_demangled_signature_length (signature); 300 301 if (namelen > strlen (name)) 302 name = obstack_alloc (&objfile->objfile_obstack, namelen + 1); 303 java_demangled_signature_copy (name, signature); 304 name[namelen] = '\0'; 305 is_array = 1; 306 temp = clas; 307 /* Set array element type. */ 308 temp = value_struct_elt (&temp, NULL, "methods", NULL, "structure"); 309 deprecated_set_value_type (temp, 310 lookup_pointer_type (value_type (clas))); 311 TYPE_TARGET_TYPE (type) = type_from_class (gdbarch, temp); 312 } 313 314 ALLOCATE_CPLUS_STRUCT_TYPE (type); 315 TYPE_TAG_NAME (type) = name; 316 317 add_class_symtab_symbol (add_class_symbol (type, addr)); 318 return java_link_class_type (gdbarch, type, clas); 319 } 320 321 /* Fill in class TYPE with data from the CLAS value. */ 322 323 static struct type * 324 java_link_class_type (struct gdbarch *gdbarch, 325 struct type *type, struct value *clas) 326 { 327 struct value *temp; 328 char *unqualified_name; 329 char *name = TYPE_TAG_NAME (type); 330 int ninterfaces, nfields, nmethods; 331 int type_is_object = 0; 332 struct fn_field *fn_fields; 333 struct fn_fieldlist *fn_fieldlists; 334 struct value *fields; 335 struct value *methods; 336 struct value *method = NULL; 337 struct value *field = NULL; 338 int i, j; 339 struct objfile *objfile = get_dynamics_objfile (gdbarch); 340 struct type *tsuper; 341 342 gdb_assert (name != NULL); 343 unqualified_name = strrchr (name, '.'); 344 if (unqualified_name == NULL) 345 unqualified_name = name; 346 347 temp = clas; 348 temp = value_struct_elt (&temp, NULL, "superclass", NULL, "structure"); 349 if (strcmp (name, "java.lang.Object") == 0) 350 { 351 tsuper = get_java_object_type (); 352 if (tsuper && TYPE_CODE (tsuper) == TYPE_CODE_PTR) 353 tsuper = TYPE_TARGET_TYPE (tsuper); 354 type_is_object = 1; 355 } 356 else 357 tsuper = type_from_class (gdbarch, temp); 358 359 #if 1 360 ninterfaces = 0; 361 #else 362 temp = clas; 363 ninterfaces = value_as_long (value_struct_elt (&temp, NULL, "interface_len", 364 NULL, "structure")); 365 #endif 366 TYPE_N_BASECLASSES (type) = (tsuper == NULL ? 0 : 1) + ninterfaces; 367 temp = clas; 368 nfields = value_as_long (value_struct_elt (&temp, NULL, "field_count", 369 NULL, "structure")); 370 nfields += TYPE_N_BASECLASSES (type); 371 nfields++; /* Add one for dummy "class" field. */ 372 TYPE_NFIELDS (type) = nfields; 373 TYPE_FIELDS (type) = (struct field *) 374 TYPE_ALLOC (type, sizeof (struct field) * nfields); 375 376 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); 377 378 TYPE_FIELD_PRIVATE_BITS (type) = 379 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); 380 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); 381 382 TYPE_FIELD_PROTECTED_BITS (type) = 383 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); 384 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); 385 386 TYPE_FIELD_IGNORE_BITS (type) = 387 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); 388 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); 389 390 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) 391 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type))); 392 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type)); 393 394 if (tsuper != NULL) 395 { 396 TYPE_BASECLASS (type, 0) = tsuper; 397 if (type_is_object) 398 SET_TYPE_FIELD_PRIVATE (type, 0); 399 } 400 401 i = strlen (name); 402 if (i > 2 && name[i - 1] == ']' && tsuper != NULL) 403 { 404 /* FIXME */ 405 TYPE_LENGTH (type) = TYPE_LENGTH (tsuper) + 4; /* size with "length" */ 406 } 407 else 408 { 409 temp = clas; 410 temp = value_struct_elt (&temp, NULL, "size_in_bytes", 411 NULL, "structure"); 412 TYPE_LENGTH (type) = value_as_long (temp); 413 } 414 415 fields = NULL; 416 nfields--; /* First set up dummy "class" field. */ 417 SET_FIELD_PHYSADDR (TYPE_FIELD (type, nfields), value_address (clas)); 418 TYPE_FIELD_NAME (type, nfields) = "class"; 419 TYPE_FIELD_TYPE (type, nfields) = value_type (clas); 420 SET_TYPE_FIELD_PRIVATE (type, nfields); 421 422 for (i = TYPE_N_BASECLASSES (type); i < nfields; i++) 423 { 424 int accflags; 425 int boffset; 426 427 if (fields == NULL) 428 { 429 temp = clas; 430 fields = value_struct_elt (&temp, NULL, "fields", NULL, "structure"); 431 field = value_ind (fields); 432 } 433 else 434 { /* Re-use field value for next field. */ 435 CORE_ADDR addr 436 = value_address (field) + TYPE_LENGTH (value_type (field)); 437 438 set_value_address (field, addr); 439 set_value_lazy (field, 1); 440 } 441 temp = field; 442 temp = value_struct_elt (&temp, NULL, "name", NULL, "structure"); 443 TYPE_FIELD_NAME (type, i) = 444 get_java_utf8_name (&objfile->objfile_obstack, temp); 445 temp = field; 446 accflags = value_as_long (value_struct_elt (&temp, NULL, "accflags", 447 NULL, "structure")); 448 temp = field; 449 temp = value_struct_elt (&temp, NULL, "info", NULL, "structure"); 450 boffset = value_as_long (value_struct_elt (&temp, NULL, "boffset", 451 NULL, "structure")); 452 if (accflags & 0x0001) /* public access */ 453 { 454 /* ??? */ 455 } 456 if (accflags & 0x0002) /* private access */ 457 { 458 SET_TYPE_FIELD_PRIVATE (type, i); 459 } 460 if (accflags & 0x0004) /* protected access */ 461 { 462 SET_TYPE_FIELD_PROTECTED (type, i); 463 } 464 if (accflags & 0x0008) /* ACC_STATIC */ 465 SET_FIELD_PHYSADDR (TYPE_FIELD (type, i), boffset); 466 else 467 TYPE_FIELD_BITPOS (type, i) = 8 * boffset; 468 if (accflags & 0x8000) /* FIELD_UNRESOLVED_FLAG */ 469 { 470 TYPE_FIELD_TYPE (type, i) = get_java_object_type (); /* FIXME */ 471 } 472 else 473 { 474 struct type *ftype; 475 476 temp = field; 477 temp = value_struct_elt (&temp, NULL, "type", NULL, "structure"); 478 ftype = type_from_class (gdbarch, temp); 479 if (TYPE_CODE (ftype) == TYPE_CODE_STRUCT) 480 ftype = lookup_pointer_type (ftype); 481 TYPE_FIELD_TYPE (type, i) = ftype; 482 } 483 } 484 485 temp = clas; 486 nmethods = value_as_long (value_struct_elt (&temp, NULL, "method_count", 487 NULL, "structure")); 488 TYPE_NFN_FIELDS_TOTAL (type) = nmethods; 489 j = nmethods * sizeof (struct fn_field); 490 fn_fields = (struct fn_field *) 491 obstack_alloc (&dynamics_objfile->objfile_obstack, j); 492 memset (fn_fields, 0, j); 493 fn_fieldlists = (struct fn_fieldlist *) 494 alloca (nmethods * sizeof (struct fn_fieldlist)); 495 496 methods = NULL; 497 for (i = 0; i < nmethods; i++) 498 { 499 char *mname; 500 int k; 501 502 if (methods == NULL) 503 { 504 temp = clas; 505 methods = value_struct_elt (&temp, NULL, "methods", 506 NULL, "structure"); 507 method = value_ind (methods); 508 } 509 else 510 { /* Re-use method value for next method. */ 511 CORE_ADDR addr 512 = value_address (method) + TYPE_LENGTH (value_type (method)); 513 514 set_value_address (method, addr); 515 set_value_lazy (method, 1); 516 } 517 518 /* Get method name. */ 519 temp = method; 520 temp = value_struct_elt (&temp, NULL, "name", NULL, "structure"); 521 mname = get_java_utf8_name (&objfile->objfile_obstack, temp); 522 if (strcmp (mname, "<init>") == 0) 523 mname = unqualified_name; 524 525 /* Check for an existing method with the same name. 526 * This makes building the fn_fieldslists an O(nmethods**2) 527 * operation. That could be using hashing, but I doubt it 528 * is worth it. Note that we do maintain the order of methods 529 * in the inferior's Method table (as long as that is grouped 530 * by method name), which I think is desirable. --PB */ 531 for (k = 0, j = TYPE_NFN_FIELDS (type);;) 532 { 533 if (--j < 0) 534 { /* No match - new method name. */ 535 j = TYPE_NFN_FIELDS (type)++; 536 fn_fieldlists[j].name = mname; 537 fn_fieldlists[j].length = 1; 538 fn_fieldlists[j].fn_fields = &fn_fields[i]; 539 k = i; 540 break; 541 } 542 if (strcmp (mname, fn_fieldlists[j].name) == 0) 543 { /* Found an existing method with the same name. */ 544 int l; 545 546 if (mname != unqualified_name) 547 obstack_free (&objfile->objfile_obstack, mname); 548 mname = fn_fieldlists[j].name; 549 fn_fieldlists[j].length++; 550 k = i - k; /* Index of new slot. */ 551 /* Shift intervening fn_fields (between k and i) down. */ 552 for (l = i; l > k; l--) 553 fn_fields[l] = fn_fields[l - 1]; 554 for (l = TYPE_NFN_FIELDS (type); --l > j;) 555 fn_fieldlists[l].fn_fields++; 556 break; 557 } 558 k += fn_fieldlists[j].length; 559 } 560 fn_fields[k].physname = ""; 561 fn_fields[k].is_stub = 1; 562 /* FIXME */ 563 fn_fields[k].type = lookup_function_type 564 (builtin_java_type (gdbarch)->builtin_void); 565 TYPE_CODE (fn_fields[k].type) = TYPE_CODE_METHOD; 566 } 567 568 j = TYPE_NFN_FIELDS (type) * sizeof (struct fn_fieldlist); 569 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) 570 obstack_alloc (&dynamics_objfile->objfile_obstack, j); 571 memcpy (TYPE_FN_FIELDLISTS (type), fn_fieldlists, j); 572 573 return type; 574 } 575 576 static struct type *java_object_type; 577 578 /* A free function that is attached to the objfile defining 579 java_object_type. This is used to clear the cached type whenever 580 its owning objfile is destroyed. */ 581 static void 582 jv_clear_object_type (struct objfile *objfile, void *ignore) 583 { 584 java_object_type = NULL; 585 } 586 587 static void 588 set_java_object_type (struct type *type) 589 { 590 struct objfile *owner; 591 592 gdb_assert (java_object_type == NULL); 593 594 owner = TYPE_OBJFILE (type); 595 if (owner) 596 set_objfile_data (owner, jv_type_objfile_data_key, &java_object_type); 597 java_object_type = type; 598 } 599 600 struct type * 601 get_java_object_type (void) 602 { 603 if (java_object_type == NULL) 604 { 605 struct symbol *sym; 606 607 sym = lookup_symbol ("java.lang.Object", NULL, STRUCT_DOMAIN, NULL); 608 if (sym == NULL) 609 error (_("cannot find java.lang.Object")); 610 set_java_object_type (SYMBOL_TYPE (sym)); 611 } 612 return java_object_type; 613 } 614 615 int 616 get_java_object_header_size (struct gdbarch *gdbarch) 617 { 618 struct type *objtype = get_java_object_type (); 619 620 if (objtype == NULL) 621 return (2 * gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT); 622 else 623 return TYPE_LENGTH (objtype); 624 } 625 626 int 627 is_object_type (struct type *type) 628 { 629 CHECK_TYPEDEF (type); 630 if (TYPE_CODE (type) == TYPE_CODE_PTR) 631 { 632 struct type *ttype = check_typedef (TYPE_TARGET_TYPE (type)); 633 char *name; 634 if (TYPE_CODE (ttype) != TYPE_CODE_STRUCT) 635 return 0; 636 while (TYPE_N_BASECLASSES (ttype) > 0) 637 ttype = TYPE_BASECLASS (ttype, 0); 638 name = TYPE_TAG_NAME (ttype); 639 if (name != NULL && strcmp (name, "java.lang.Object") == 0) 640 return 1; 641 name 642 = TYPE_NFIELDS (ttype) > 0 ? TYPE_FIELD_NAME (ttype, 0) : (char *) 0; 643 if (name != NULL && strcmp (name, "vtable") == 0) 644 { 645 if (java_object_type == NULL) 646 set_java_object_type (type); 647 return 1; 648 } 649 } 650 return 0; 651 } 652 653 struct type * 654 java_primitive_type (struct gdbarch *gdbarch, int signature) 655 { 656 const struct builtin_java_type *builtin = builtin_java_type (gdbarch); 657 658 switch (signature) 659 { 660 case 'B': 661 return builtin->builtin_byte; 662 case 'S': 663 return builtin->builtin_short; 664 case 'I': 665 return builtin->builtin_int; 666 case 'J': 667 return builtin->builtin_long; 668 case 'Z': 669 return builtin->builtin_boolean; 670 case 'C': 671 return builtin->builtin_char; 672 case 'F': 673 return builtin->builtin_float; 674 case 'D': 675 return builtin->builtin_double; 676 case 'V': 677 return builtin->builtin_void; 678 } 679 error (_("unknown signature '%c' for primitive type"), (char) signature); 680 } 681 682 /* If name[0 .. namelen-1] is the name of a primitive Java type, 683 return that type. Otherwise, return NULL. */ 684 685 struct type * 686 java_primitive_type_from_name (struct gdbarch *gdbarch, 687 char *name, int namelen) 688 { 689 const struct builtin_java_type *builtin = builtin_java_type (gdbarch); 690 691 switch (name[0]) 692 { 693 case 'b': 694 if (namelen == 4 && memcmp (name, "byte", 4) == 0) 695 return builtin->builtin_byte; 696 if (namelen == 7 && memcmp (name, "boolean", 7) == 0) 697 return builtin->builtin_boolean; 698 break; 699 case 'c': 700 if (namelen == 4 && memcmp (name, "char", 4) == 0) 701 return builtin->builtin_char; 702 break; 703 case 'd': 704 if (namelen == 6 && memcmp (name, "double", 6) == 0) 705 return builtin->builtin_double; 706 break; 707 case 'f': 708 if (namelen == 5 && memcmp (name, "float", 5) == 0) 709 return builtin->builtin_float; 710 break; 711 case 'i': 712 if (namelen == 3 && memcmp (name, "int", 3) == 0) 713 return builtin->builtin_int; 714 break; 715 case 'l': 716 if (namelen == 4 && memcmp (name, "long", 4) == 0) 717 return builtin->builtin_long; 718 break; 719 case 's': 720 if (namelen == 5 && memcmp (name, "short", 5) == 0) 721 return builtin->builtin_short; 722 break; 723 case 'v': 724 if (namelen == 4 && memcmp (name, "void", 4) == 0) 725 return builtin->builtin_void; 726 break; 727 } 728 return NULL; 729 } 730 731 static char * 732 java_primitive_type_name (int signature) 733 { 734 switch (signature) 735 { 736 case 'B': 737 return "byte"; 738 case 'S': 739 return "short"; 740 case 'I': 741 return "int"; 742 case 'J': 743 return "long"; 744 case 'Z': 745 return "boolean"; 746 case 'C': 747 return "char"; 748 case 'F': 749 return "float"; 750 case 'D': 751 return "double"; 752 case 'V': 753 return "void"; 754 } 755 error (_("unknown signature '%c' for primitive type"), (char) signature); 756 } 757 758 /* Return the length (in bytes) of demangled name of the Java type 759 signature string SIGNATURE. */ 760 761 static int 762 java_demangled_signature_length (char *signature) 763 { 764 int array = 0; 765 766 for (; *signature == '['; signature++) 767 array += 2; /* Two chars for "[]". */ 768 switch (signature[0]) 769 { 770 case 'L': 771 /* Subtract 2 for 'L' and ';'. */ 772 return strlen (signature) - 2 + array; 773 default: 774 return strlen (java_primitive_type_name (signature[0])) + array; 775 } 776 } 777 778 /* Demangle the Java type signature SIGNATURE, leaving the result in 779 RESULT. */ 780 781 static void 782 java_demangled_signature_copy (char *result, char *signature) 783 { 784 int array = 0; 785 char *ptr; 786 int i; 787 788 while (*signature == '[') 789 { 790 array++; 791 signature++; 792 } 793 switch (signature[0]) 794 { 795 case 'L': 796 /* Subtract 2 for 'L' and ';', but add 1 for final nul. */ 797 signature++; 798 ptr = result; 799 for (; *signature != ';' && *signature != '\0'; signature++) 800 { 801 if (*signature == '/') 802 *ptr++ = '.'; 803 else 804 *ptr++ = *signature; 805 } 806 break; 807 default: 808 ptr = java_primitive_type_name (signature[0]); 809 i = strlen (ptr); 810 strcpy (result, ptr); 811 ptr = result + i; 812 break; 813 } 814 while (--array >= 0) 815 { 816 *ptr++ = '['; 817 *ptr++ = ']'; 818 } 819 } 820 821 /* Return the demangled name of the Java type signature string SIGNATURE, 822 as a freshly allocated copy. */ 823 824 char * 825 java_demangle_type_signature (char *signature) 826 { 827 int length = java_demangled_signature_length (signature); 828 char *result = xmalloc (length + 1); 829 830 java_demangled_signature_copy (result, signature); 831 result[length] = '\0'; 832 return result; 833 } 834 835 /* Return the type of TYPE followed by DIMS pairs of [ ]. 836 If DIMS == 0, TYPE is returned. */ 837 838 struct type * 839 java_array_type (struct type *type, int dims) 840 { 841 while (dims-- > 0) 842 { 843 /* FIXME This is bogus! Java arrays are not gdb arrays! */ 844 type = lookup_array_range_type (type, 0, 0); 845 } 846 847 return type; 848 } 849 850 /* Create a Java string in the inferior from a (Utf8) literal. */ 851 852 static struct value * 853 java_value_string (char *ptr, int len) 854 { 855 error (_("not implemented - java_value_string")); /* FIXME */ 856 } 857 858 /* Print the character C on STREAM as part of the contents of a literal 859 string whose delimiter is QUOTER. Note that that format for printing 860 characters and strings is language specific. */ 861 862 static void 863 java_emit_char (int c, struct type *type, struct ui_file *stream, int quoter) 864 { 865 switch (c) 866 { 867 case '\\': 868 case '\'': 869 fprintf_filtered (stream, "\\%c", c); 870 break; 871 case '\b': 872 fputs_filtered ("\\b", stream); 873 break; 874 case '\t': 875 fputs_filtered ("\\t", stream); 876 break; 877 case '\n': 878 fputs_filtered ("\\n", stream); 879 break; 880 case '\f': 881 fputs_filtered ("\\f", stream); 882 break; 883 case '\r': 884 fputs_filtered ("\\r", stream); 885 break; 886 default: 887 if (isprint (c)) 888 fputc_filtered (c, stream); 889 else 890 fprintf_filtered (stream, "\\u%.4x", (unsigned int) c); 891 break; 892 } 893 } 894 895 static struct value * 896 evaluate_subexp_java (struct type *expect_type, struct expression *exp, 897 int *pos, enum noside noside) 898 { 899 int pc = *pos; 900 int i; 901 char *name; 902 enum exp_opcode op = exp->elts[*pos].opcode; 903 struct value *arg1; 904 struct value *arg2; 905 struct type *type; 906 907 switch (op) 908 { 909 case UNOP_IND: 910 if (noside == EVAL_SKIP) 911 goto standard; 912 (*pos)++; 913 arg1 = evaluate_subexp_java (NULL_TYPE, exp, pos, EVAL_NORMAL); 914 if (is_object_type (value_type (arg1))) 915 { 916 struct type *type; 917 918 type = type_from_class (exp->gdbarch, java_class_from_object (arg1)); 919 arg1 = value_cast (lookup_pointer_type (type), arg1); 920 } 921 return value_ind (arg1); 922 923 case BINOP_SUBSCRIPT: 924 (*pos)++; 925 arg1 = evaluate_subexp_with_coercion (exp, pos, noside); 926 arg2 = evaluate_subexp_with_coercion (exp, pos, noside); 927 if (noside == EVAL_SKIP) 928 goto nosideret; 929 /* If the user attempts to subscript something that is not an 930 array or pointer type (like a plain int variable for example), 931 then report this as an error. */ 932 933 arg1 = coerce_ref (arg1); 934 type = check_typedef (value_type (arg1)); 935 if (TYPE_CODE (type) == TYPE_CODE_PTR) 936 type = check_typedef (TYPE_TARGET_TYPE (type)); 937 name = TYPE_NAME (type); 938 if (name == NULL) 939 name = TYPE_TAG_NAME (type); 940 i = name == NULL ? 0 : strlen (name); 941 if (TYPE_CODE (type) == TYPE_CODE_STRUCT 942 && i > 2 && name[i - 1] == ']') 943 { 944 enum bfd_endian byte_order = gdbarch_byte_order (exp->gdbarch); 945 CORE_ADDR address; 946 long length, index; 947 struct type *el_type; 948 gdb_byte buf4[4]; 949 950 struct value *clas = java_class_from_object (arg1); 951 struct value *temp = clas; 952 /* Get CLASS_ELEMENT_TYPE of the array type. */ 953 temp = value_struct_elt (&temp, NULL, "methods", 954 NULL, "structure"); 955 deprecated_set_value_type (temp, value_type (clas)); 956 el_type = type_from_class (exp->gdbarch, temp); 957 if (TYPE_CODE (el_type) == TYPE_CODE_STRUCT) 958 el_type = lookup_pointer_type (el_type); 959 960 if (noside == EVAL_AVOID_SIDE_EFFECTS) 961 return value_zero (el_type, VALUE_LVAL (arg1)); 962 address = value_as_address (arg1); 963 address += get_java_object_header_size (exp->gdbarch); 964 read_memory (address, buf4, 4); 965 length = (long) extract_signed_integer (buf4, 4, byte_order); 966 index = (long) value_as_long (arg2); 967 if (index >= length || index < 0) 968 error (_("array index (%ld) out of bounds (length: %ld)"), 969 index, length); 970 address = (address + 4) + index * TYPE_LENGTH (el_type); 971 return value_at (el_type, address); 972 } 973 else if (TYPE_CODE (type) == TYPE_CODE_ARRAY) 974 { 975 if (noside == EVAL_AVOID_SIDE_EFFECTS) 976 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1)); 977 else 978 return value_subscript (arg1, value_as_long (arg2)); 979 } 980 if (name) 981 error (_("cannot subscript something of type `%s'"), name); 982 else 983 error (_("cannot subscript requested type")); 984 985 case OP_STRING: 986 (*pos)++; 987 i = longest_to_int (exp->elts[pc + 1].longconst); 988 (*pos) += 3 + BYTES_TO_EXP_ELEM (i + 1); 989 if (noside == EVAL_SKIP) 990 goto nosideret; 991 return java_value_string (&exp->elts[pc + 2].string, i); 992 993 case STRUCTOP_PTR: 994 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside); 995 /* Convert object field (such as TYPE.class) to reference. */ 996 if (TYPE_CODE (value_type (arg1)) == TYPE_CODE_STRUCT) 997 arg1 = value_addr (arg1); 998 return arg1; 999 default: 1000 break; 1001 } 1002 standard: 1003 return evaluate_subexp_standard (expect_type, exp, pos, noside); 1004 nosideret: 1005 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1); 1006 } 1007 1008 static char *java_demangle (const char *mangled, int options) 1009 { 1010 return cplus_demangle (mangled, options | DMGL_JAVA); 1011 } 1012 1013 /* Find the member function name of the demangled name NAME. NAME 1014 must be a method name including arguments, in order to correctly 1015 locate the last component. 1016 1017 This function return a pointer to the first dot before the 1018 member function name, or NULL if the name was not of the 1019 expected form. */ 1020 1021 static const char * 1022 java_find_last_component (const char *name) 1023 { 1024 const char *p; 1025 1026 /* Find argument list. */ 1027 p = strchr (name, '('); 1028 1029 if (p == NULL) 1030 return NULL; 1031 1032 /* Back up and find first dot prior to argument list. */ 1033 while (p > name && *p != '.') 1034 p--; 1035 1036 if (p == name) 1037 return NULL; 1038 1039 return p; 1040 } 1041 1042 /* Return the name of the class containing method PHYSNAME. */ 1043 1044 static char * 1045 java_class_name_from_physname (const char *physname) 1046 { 1047 char *ret = NULL; 1048 const char *end; 1049 char *demangled_name = java_demangle (physname, DMGL_PARAMS | DMGL_ANSI); 1050 1051 if (demangled_name == NULL) 1052 return NULL; 1053 1054 end = java_find_last_component (demangled_name); 1055 if (end != NULL) 1056 { 1057 ret = xmalloc (end - demangled_name + 1); 1058 memcpy (ret, demangled_name, end - demangled_name); 1059 ret[end - demangled_name] = '\0'; 1060 } 1061 1062 xfree (demangled_name); 1063 return ret; 1064 } 1065 1066 /* Table mapping opcodes into strings for printing operators 1067 and precedences of the operators. */ 1068 1069 const struct op_print java_op_print_tab[] = 1070 { 1071 {",", BINOP_COMMA, PREC_COMMA, 0}, 1072 {"=", BINOP_ASSIGN, PREC_ASSIGN, 1}, 1073 {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, 1074 {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, 1075 {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0}, 1076 {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0}, 1077 {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0}, 1078 {"==", BINOP_EQUAL, PREC_EQUAL, 0}, 1079 {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0}, 1080 {"<=", BINOP_LEQ, PREC_ORDER, 0}, 1081 {">=", BINOP_GEQ, PREC_ORDER, 0}, 1082 {">", BINOP_GTR, PREC_ORDER, 0}, 1083 {"<", BINOP_LESS, PREC_ORDER, 0}, 1084 {">>", BINOP_RSH, PREC_SHIFT, 0}, 1085 {"<<", BINOP_LSH, PREC_SHIFT, 0}, 1086 {"+", BINOP_ADD, PREC_ADD, 0}, 1087 {"-", BINOP_SUB, PREC_ADD, 0}, 1088 {"*", BINOP_MUL, PREC_MUL, 0}, 1089 {"/", BINOP_DIV, PREC_MUL, 0}, 1090 {"%", BINOP_REM, PREC_MUL, 0}, 1091 {"-", UNOP_NEG, PREC_PREFIX, 0}, 1092 {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, 1093 {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0}, 1094 {"*", UNOP_IND, PREC_PREFIX, 0}, 1095 {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0}, 1096 {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0}, 1097 {NULL, 0, 0, 0} 1098 }; 1099 1100 enum java_primitive_types 1101 { 1102 java_primitive_type_int, 1103 java_primitive_type_short, 1104 java_primitive_type_long, 1105 java_primitive_type_byte, 1106 java_primitive_type_boolean, 1107 java_primitive_type_char, 1108 java_primitive_type_float, 1109 java_primitive_type_double, 1110 java_primitive_type_void, 1111 nr_java_primitive_types 1112 }; 1113 1114 static void 1115 java_language_arch_info (struct gdbarch *gdbarch, 1116 struct language_arch_info *lai) 1117 { 1118 const struct builtin_java_type *builtin = builtin_java_type (gdbarch); 1119 1120 lai->string_char_type = builtin->builtin_char; 1121 lai->primitive_type_vector 1122 = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_java_primitive_types + 1, 1123 struct type *); 1124 lai->primitive_type_vector [java_primitive_type_int] 1125 = builtin->builtin_int; 1126 lai->primitive_type_vector [java_primitive_type_short] 1127 = builtin->builtin_short; 1128 lai->primitive_type_vector [java_primitive_type_long] 1129 = builtin->builtin_long; 1130 lai->primitive_type_vector [java_primitive_type_byte] 1131 = builtin->builtin_byte; 1132 lai->primitive_type_vector [java_primitive_type_boolean] 1133 = builtin->builtin_boolean; 1134 lai->primitive_type_vector [java_primitive_type_char] 1135 = builtin->builtin_char; 1136 lai->primitive_type_vector [java_primitive_type_float] 1137 = builtin->builtin_float; 1138 lai->primitive_type_vector [java_primitive_type_double] 1139 = builtin->builtin_double; 1140 lai->primitive_type_vector [java_primitive_type_void] 1141 = builtin->builtin_void; 1142 1143 lai->bool_type_symbol = "boolean"; 1144 lai->bool_type_default = builtin->builtin_boolean; 1145 } 1146 1147 const struct exp_descriptor exp_descriptor_java = 1148 { 1149 print_subexp_standard, 1150 operator_length_standard, 1151 operator_check_standard, 1152 op_name_standard, 1153 dump_subexp_body_standard, 1154 evaluate_subexp_java 1155 }; 1156 1157 const struct language_defn java_language_defn = 1158 { 1159 "java", /* Language name */ 1160 language_java, 1161 range_check_off, 1162 type_check_off, 1163 case_sensitive_on, 1164 array_row_major, 1165 macro_expansion_no, 1166 &exp_descriptor_java, 1167 java_parse, 1168 java_error, 1169 null_post_parser, 1170 c_printchar, /* Print a character constant */ 1171 c_printstr, /* Function to print string constant */ 1172 java_emit_char, /* Function to print a single character */ 1173 java_print_type, /* Print a type using appropriate syntax */ 1174 default_print_typedef, /* Print a typedef using appropriate syntax */ 1175 java_val_print, /* Print a value using appropriate syntax */ 1176 java_value_print, /* Print a top-level value */ 1177 NULL, /* Language specific skip_trampoline */ 1178 "this", /* name_of_this */ 1179 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ 1180 basic_lookup_transparent_type,/* lookup_transparent_type */ 1181 java_demangle, /* Language specific symbol demangler */ 1182 java_class_name_from_physname,/* Language specific class name */ 1183 java_op_print_tab, /* expression operators for printing */ 1184 0, /* not c-style arrays */ 1185 0, /* String lower bound */ 1186 default_word_break_characters, 1187 default_make_symbol_completion_list, 1188 java_language_arch_info, 1189 default_print_array_index, 1190 default_pass_by_reference, 1191 default_get_string, 1192 LANG_MAGIC 1193 }; 1194 1195 static void * 1196 build_java_types (struct gdbarch *gdbarch) 1197 { 1198 struct builtin_java_type *builtin_java_type 1199 = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_java_type); 1200 1201 builtin_java_type->builtin_int 1202 = arch_integer_type (gdbarch, 32, 0, "int"); 1203 builtin_java_type->builtin_short 1204 = arch_integer_type (gdbarch, 16, 0, "short"); 1205 builtin_java_type->builtin_long 1206 = arch_integer_type (gdbarch, 64, 0, "long"); 1207 builtin_java_type->builtin_byte 1208 = arch_integer_type (gdbarch, 8, 0, "byte"); 1209 builtin_java_type->builtin_boolean 1210 = arch_boolean_type (gdbarch, 8, 0, "boolean"); 1211 builtin_java_type->builtin_char 1212 = arch_character_type (gdbarch, 16, 1, "char"); 1213 builtin_java_type->builtin_float 1214 = arch_float_type (gdbarch, 32, "float", NULL); 1215 builtin_java_type->builtin_double 1216 = arch_float_type (gdbarch, 64, "double", NULL); 1217 builtin_java_type->builtin_void 1218 = arch_type (gdbarch, TYPE_CODE_VOID, 1, "void"); 1219 1220 return builtin_java_type; 1221 } 1222 1223 static struct gdbarch_data *java_type_data; 1224 1225 const struct builtin_java_type * 1226 builtin_java_type (struct gdbarch *gdbarch) 1227 { 1228 return gdbarch_data (gdbarch, java_type_data); 1229 } 1230 1231 void 1232 _initialize_java_language (void) 1233 { 1234 jv_dynamics_objfile_data_key 1235 = register_objfile_data_with_cleanup (NULL, jv_per_objfile_free); 1236 jv_type_objfile_data_key 1237 = register_objfile_data_with_cleanup (NULL, jv_clear_object_type); 1238 1239 java_type_data = gdbarch_data_register_post_init (build_java_types); 1240 1241 add_language (&java_language_defn); 1242 } 1243