jv-lang.c revision 98944
1/* Java language support routines for GDB, the GNU debugger. 2 Copyright 1997, 1998, 1999, 2000 Free Software Foundation, Inc. 3 4 This file is part of GDB. 5 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. 10 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. 15 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. */ 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 48/* Local functions */ 49 50extern void _initialize_java_language (void); 51 52static int java_demangled_signature_length (char *); 53static void java_demangled_signature_copy (char *, char *); 54 55static struct symtab *get_java_class_symtab (void); 56static char *get_java_utf8_name (struct obstack *obstack, struct value *name); 57static int java_class_is_primitive (struct value *clas); 58static struct type *java_lookup_type (char *signature); 59static struct value *java_value_string (char *ptr, int len); 60 61static void java_emit_char (int c, struct ui_file * stream, int quoter); 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 69static struct type *java_link_class_type (struct type *, struct value *); 70 71static struct objfile * 72get_dynamics_objfile (void) 73{ 74 if (dynamics_objfile == NULL) 75 { 76 dynamics_objfile = allocate_objfile (NULL, 0); 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 90static struct symtab * 91get_java_class_symtab (void) 92{ 93 if (class_symtab == NULL) 94 { 95 struct objfile *objfile = get_dynamics_objfile (); 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 = xmmalloc (objfile->md, 119 sizeof (struct block) 120 + ((class_symtab_space - 1) * sizeof (struct symbol *))); 121 *bl = *BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK); 122 BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl; 123 class_symtab->free_ptr = (char *) bl; 124 } 125 return class_symtab; 126} 127 128static void 129add_class_symtab_symbol (struct symbol *sym) 130{ 131 struct symtab *symtab = get_java_class_symtab (); 132 struct blockvector *bv = BLOCKVECTOR (symtab); 133 struct block *bl = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK); 134 if (BLOCK_NSYMS (bl) >= class_symtab_space) 135 { 136 /* Need to re-allocate. */ 137 class_symtab_space *= 2; 138 bl = xmrealloc (symtab->objfile->md, bl, 139 sizeof (struct block) 140 + ((class_symtab_space - 1) * sizeof (struct symbol *))); 141 class_symtab->free_ptr = (char *) bl; 142 BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl; 143 } 144 145 BLOCK_SYM (bl, BLOCK_NSYMS (bl)) = sym; 146 BLOCK_NSYMS (bl) = BLOCK_NSYMS (bl) + 1; 147} 148 149static struct symbol *add_class_symbol (struct type *type, CORE_ADDR addr); 150 151static struct symbol * 152add_class_symbol (struct type *type, CORE_ADDR addr) 153{ 154 struct symbol *sym; 155 sym = (struct symbol *) 156 obstack_alloc (&dynamics_objfile->symbol_obstack, sizeof (struct symbol)); 157 memset (sym, 0, sizeof (struct symbol)); 158 SYMBOL_LANGUAGE (sym) = language_java; 159 SYMBOL_NAME (sym) = TYPE_TAG_NAME (type); 160 SYMBOL_CLASS (sym) = LOC_TYPEDEF; 161 /* SYMBOL_VALUE (sym) = valu; */ 162 SYMBOL_TYPE (sym) = type; 163 SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; 164 SYMBOL_VALUE_ADDRESS (sym) = addr; 165 return sym; 166} 167#endif 168 169struct type * 170java_lookup_class (char *name) 171{ 172 struct symbol *sym; 173 sym = lookup_symbol (name, expression_context_block, STRUCT_NAMESPACE, 174 (int *) 0, (struct symtab **) NULL); 175 if (sym != NULL) 176 return SYMBOL_TYPE (sym); 177#if 0 178 CORE_ADDR addr; 179 if (called from parser) 180 { 181 call lookup_class (or similar) in inferior; 182 if not 183 found: 184 return NULL; 185 addr = found in inferior; 186 } 187 else 188 addr = 0; 189 struct type *type; 190 type = alloc_type (objfile); 191 TYPE_CODE (type) = TYPE_CODE_STRUCT; 192 INIT_CPLUS_SPECIFIC (type); 193 TYPE_TAG_NAME (type) = obsavestring (name, strlen (name), &objfile->type_obstack); 194 TYPE_FLAGS (type) |= TYPE_FLAG_STUB; 195 TYPE ? = addr; 196 return type; 197#else 198 /* FIXME - should search inferior's symbol table. */ 199 return NULL; 200#endif 201} 202 203/* Return a nul-terminated string (allocated on OBSTACK) for 204 a name given by NAME (which has type Utf8Const*). */ 205 206char * 207get_java_utf8_name (struct obstack *obstack, struct value *name) 208{ 209 char *chrs; 210 struct value *temp = name; 211 int name_length; 212 CORE_ADDR data_addr; 213 temp = value_struct_elt (&temp, NULL, "length", NULL, "structure"); 214 name_length = (int) value_as_long (temp); 215 data_addr = VALUE_ADDRESS (temp) + VALUE_OFFSET (temp) 216 + TYPE_LENGTH (VALUE_TYPE (temp)); 217 chrs = obstack_alloc (obstack, name_length + 1); 218 chrs[name_length] = '\0'; 219 read_memory (data_addr, chrs, name_length); 220 return chrs; 221} 222 223struct value * 224java_class_from_object (struct value *obj_val) 225{ 226 /* This is all rather inefficient, since the offsets of vtable and 227 class are fixed. FIXME */ 228 struct value *vtable_val; 229 230 if (TYPE_CODE (VALUE_TYPE (obj_val)) == TYPE_CODE_PTR 231 && TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (obj_val))) == 0) 232 obj_val = value_at (get_java_object_type (), 233 value_as_address (obj_val), NULL); 234 235 vtable_val = value_struct_elt (&obj_val, NULL, "vtable", NULL, "structure"); 236 return value_struct_elt (&vtable_val, NULL, "class", NULL, "structure"); 237} 238 239/* Check if CLASS_IS_PRIMITIVE(value of clas): */ 240static int 241java_class_is_primitive (struct value *clas) 242{ 243 struct value *vtable = value_struct_elt (&clas, NULL, "vtable", NULL, "struct"); 244 CORE_ADDR i = value_as_address (vtable); 245 return (int) (i & 0x7fffffff) == (int) 0x7fffffff; 246} 247 248/* Read a GCJ Class object, and generated a gdb (TYPE_CODE_STRUCT) type. */ 249 250struct type * 251type_from_class (struct value *clas) 252{ 253 struct type *type; 254 char *name; 255 struct value *temp; 256 struct objfile *objfile; 257 struct value *utf8_name; 258 char *nptr; 259 CORE_ADDR addr; 260 struct block *bl; 261 int i; 262 int is_array = 0; 263 264 type = check_typedef (VALUE_TYPE (clas)); 265 if (TYPE_CODE (type) == TYPE_CODE_PTR) 266 { 267 if (value_logical_not (clas)) 268 return NULL; 269 clas = value_ind (clas); 270 } 271 addr = VALUE_ADDRESS (clas) + VALUE_OFFSET (clas); 272 273#if 0 274 get_java_class_symtab (); 275 bl = BLOCKVECTOR_BLOCK (BLOCKVECTOR (class_symtab), GLOBAL_BLOCK); 276 for (i = BLOCK_NSYMS (bl); --i >= 0;) 277 { 278 struct symbol *sym = BLOCK_SYM (bl, i); 279 if (SYMBOL_VALUE_ADDRESS (sym) == addr) 280 return SYMBOL_TYPE (sym); 281 } 282#endif 283 284 objfile = get_dynamics_objfile (); 285 if (java_class_is_primitive (clas)) 286 { 287 struct value *sig; 288 temp = clas; 289 sig = value_struct_elt (&temp, NULL, "method_count", NULL, "structure"); 290 return java_primitive_type (value_as_long (sig)); 291 } 292 293 /* Get Class name. */ 294 /* if clasloader non-null, prepend loader address. FIXME */ 295 temp = clas; 296 utf8_name = value_struct_elt (&temp, NULL, "name", NULL, "structure"); 297 name = get_java_utf8_name (&objfile->type_obstack, utf8_name); 298 for (nptr = name; *nptr != 0; nptr++) 299 { 300 if (*nptr == '/') 301 *nptr = '.'; 302 } 303 304 type = java_lookup_class (name); 305 if (type != NULL) 306 return type; 307 308 type = alloc_type (objfile); 309 TYPE_CODE (type) = TYPE_CODE_STRUCT; 310 INIT_CPLUS_SPECIFIC (type); 311 312 if (name[0] == '[') 313 { 314 char *signature = name; 315 int namelen = java_demangled_signature_length (signature); 316 if (namelen > strlen (name)) 317 name = obstack_alloc (&objfile->type_obstack, namelen + 1); 318 java_demangled_signature_copy (name, signature); 319 name[namelen] = '\0'; 320 is_array = 1; 321 temp = clas; 322 /* Set array element type. */ 323 temp = value_struct_elt (&temp, NULL, "methods", NULL, "structure"); 324 VALUE_TYPE (temp) = lookup_pointer_type (VALUE_TYPE (clas)); 325 TYPE_TARGET_TYPE (type) = type_from_class (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 (type, clas); 333} 334 335/* Fill in class TYPE with data from the CLAS value. */ 336 337struct type * 338java_link_class_type (struct type *type, struct value *clas) 339{ 340 struct value *temp; 341 char *unqualified_name; 342 char *name = TYPE_TAG_NAME (type); 343 int ninterfaces, nfields, nmethods; 344 int type_is_object = 0; 345 struct fn_field *fn_fields; 346 struct fn_fieldlist *fn_fieldlists; 347 struct value *fields; 348 struct value *methods; 349 struct value *method = NULL; 350 struct value *field = NULL; 351 int i, j; 352 struct objfile *objfile = get_dynamics_objfile (); 353 struct type *tsuper; 354 355 unqualified_name = strrchr (name, '.'); 356 if (unqualified_name == NULL) 357 unqualified_name = name; 358 359 temp = clas; 360 temp = value_struct_elt (&temp, NULL, "superclass", NULL, "structure"); 361 if (name != NULL && strcmp (name, "java.lang.Object") == 0) 362 { 363 tsuper = get_java_object_type (); 364 if (tsuper && TYPE_CODE (tsuper) == TYPE_CODE_PTR) 365 tsuper = TYPE_TARGET_TYPE (tsuper); 366 type_is_object = 1; 367 } 368 else 369 tsuper = type_from_class (temp); 370 371#if 1 372 ninterfaces = 0; 373#else 374 temp = clas; 375 ninterfaces = value_as_long (value_struct_elt (&temp, NULL, "interface_len", NULL, "structure")); 376#endif 377 TYPE_N_BASECLASSES (type) = (tsuper == NULL ? 0 : 1) + ninterfaces; 378 temp = clas; 379 nfields = value_as_long (value_struct_elt (&temp, NULL, "field_count", NULL, "structure")); 380 nfields += TYPE_N_BASECLASSES (type); 381 nfields++; /* Add one for dummy "class" field. */ 382 TYPE_NFIELDS (type) = nfields; 383 TYPE_FIELDS (type) = (struct field *) 384 TYPE_ALLOC (type, sizeof (struct field) * nfields); 385 386 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields); 387 388 TYPE_FIELD_PRIVATE_BITS (type) = 389 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); 390 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); 391 392 TYPE_FIELD_PROTECTED_BITS (type) = 393 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); 394 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); 395 396 TYPE_FIELD_IGNORE_BITS (type) = 397 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); 398 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); 399 400 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) 401 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type))); 402 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type)); 403 404 if (tsuper != NULL) 405 { 406 TYPE_BASECLASS (type, 0) = tsuper; 407 if (type_is_object) 408 SET_TYPE_FIELD_PRIVATE (type, 0); 409 } 410 411 i = strlen (name); 412 if (i > 2 && name[i - 1] == ']' && tsuper != NULL) 413 { 414 /* FIXME */ 415 TYPE_LENGTH (type) = TYPE_LENGTH (tsuper) + 4; /* size with "length" */ 416 } 417 else 418 { 419 temp = clas; 420 temp = value_struct_elt (&temp, NULL, "size_in_bytes", NULL, "structure"); 421 TYPE_LENGTH (type) = value_as_long (temp); 422 } 423 424 fields = NULL; 425 nfields--; /* First set up dummy "class" field. */ 426 SET_FIELD_PHYSADDR (TYPE_FIELD (type, nfields), 427 VALUE_ADDRESS (clas) + VALUE_OFFSET (clas)); 428 TYPE_FIELD_NAME (type, nfields) = "class"; 429 TYPE_FIELD_TYPE (type, nfields) = VALUE_TYPE (clas); 430 SET_TYPE_FIELD_PRIVATE (type, nfields); 431 432 for (i = TYPE_N_BASECLASSES (type); i < nfields; i++) 433 { 434 int accflags; 435 int boffset; 436 if (fields == NULL) 437 { 438 temp = clas; 439 fields = value_struct_elt (&temp, NULL, "fields", NULL, "structure"); 440 field = value_ind (fields); 441 } 442 else 443 { /* Re-use field value for next field. */ 444 VALUE_ADDRESS (field) += TYPE_LENGTH (VALUE_TYPE (field)); 445 VALUE_LAZY (field) = 1; 446 } 447 temp = field; 448 temp = value_struct_elt (&temp, NULL, "name", NULL, "structure"); 449 TYPE_FIELD_NAME (type, i) = 450 get_java_utf8_name (&objfile->type_obstack, temp); 451 temp = field; 452 accflags = value_as_long (value_struct_elt (&temp, NULL, "accflags", 453 NULL, "structure")); 454 temp = field; 455 temp = value_struct_elt (&temp, NULL, "info", NULL, "structure"); 456 boffset = value_as_long (value_struct_elt (&temp, NULL, "boffset", 457 NULL, "structure")); 458 if (accflags & 0x0001) /* public access */ 459 { 460 /* ??? */ 461 } 462 if (accflags & 0x0002) /* private access */ 463 { 464 SET_TYPE_FIELD_PRIVATE (type, i); 465 } 466 if (accflags & 0x0004) /* protected access */ 467 { 468 SET_TYPE_FIELD_PROTECTED (type, i); 469 } 470 if (accflags & 0x0008) /* ACC_STATIC */ 471 SET_FIELD_PHYSADDR (TYPE_FIELD (type, i), boffset); 472 else 473 TYPE_FIELD_BITPOS (type, i) = 8 * boffset; 474 if (accflags & 0x8000) /* FIELD_UNRESOLVED_FLAG */ 475 { 476 TYPE_FIELD_TYPE (type, i) = get_java_object_type (); /* FIXME */ 477 } 478 else 479 { 480 struct type *ftype; 481 temp = field; 482 temp = value_struct_elt (&temp, NULL, "type", NULL, "structure"); 483 ftype = type_from_class (temp); 484 if (TYPE_CODE (ftype) == TYPE_CODE_STRUCT) 485 ftype = lookup_pointer_type (ftype); 486 TYPE_FIELD_TYPE (type, i) = ftype; 487 } 488 } 489 490 temp = clas; 491 nmethods = value_as_long (value_struct_elt (&temp, NULL, "method_count", 492 NULL, "structure")); 493 TYPE_NFN_FIELDS_TOTAL (type) = nmethods; 494 j = nmethods * sizeof (struct fn_field); 495 fn_fields = (struct fn_field *) 496 obstack_alloc (&dynamics_objfile->symbol_obstack, j); 497 memset (fn_fields, 0, j); 498 fn_fieldlists = (struct fn_fieldlist *) 499 alloca (nmethods * sizeof (struct fn_fieldlist)); 500 501 methods = NULL; 502 for (i = 0; i < nmethods; i++) 503 { 504 char *mname; 505 int k; 506 if (methods == NULL) 507 { 508 temp = clas; 509 methods = value_struct_elt (&temp, NULL, "methods", NULL, "structure"); 510 method = value_ind (methods); 511 } 512 else 513 { /* Re-use method value for next method. */ 514 VALUE_ADDRESS (method) += TYPE_LENGTH (VALUE_TYPE (method)); 515 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->type_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 if (mname != unqualified_name) 546 obstack_free (&objfile->type_obstack, mname); 547 mname = fn_fieldlists[j].name; 548 fn_fieldlists[j].length++; 549 k = i - k; /* Index of new slot. */ 550 /* Shift intervening fn_fields (between k and i) down. */ 551 for (l = i; l > k; l--) 552 fn_fields[l] = fn_fields[l - 1]; 553 for (l = TYPE_NFN_FIELDS (type); --l > j;) 554 fn_fieldlists[l].fn_fields++; 555 break; 556 } 557 k += fn_fieldlists[j].length; 558 } 559 fn_fields[k].physname = ""; 560 fn_fields[k].is_stub = 1; 561 fn_fields[k].type = make_function_type (java_void_type, NULL); /* FIXME */ 562 TYPE_CODE (fn_fields[k].type) = TYPE_CODE_METHOD; 563 } 564 565 j = TYPE_NFN_FIELDS (type) * sizeof (struct fn_fieldlist); 566 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) 567 obstack_alloc (&dynamics_objfile->symbol_obstack, j); 568 memcpy (TYPE_FN_FIELDLISTS (type), fn_fieldlists, j); 569 570 return type; 571} 572 573static struct type *java_object_type; 574 575struct type * 576get_java_object_type (void) 577{ 578 if (java_object_type == NULL) 579 { 580 struct symbol *sym; 581 sym = lookup_symbol ("java.lang.Object", NULL, STRUCT_NAMESPACE, 582 (int *) 0, (struct symtab **) NULL); 583 if (sym == NULL) 584 error ("cannot find java.lang.Object"); 585 java_object_type = SYMBOL_TYPE (sym); 586 } 587 return java_object_type; 588} 589 590int 591get_java_object_header_size (void) 592{ 593 struct type *objtype = get_java_object_type (); 594 if (objtype == NULL) 595 return (2 * TARGET_PTR_BIT / TARGET_CHAR_BIT); 596 else 597 return TYPE_LENGTH (objtype); 598} 599 600int 601is_object_type (struct type *type) 602{ 603 CHECK_TYPEDEF (type); 604 if (TYPE_CODE (type) == TYPE_CODE_PTR) 605 { 606 struct type *ttype = check_typedef (TYPE_TARGET_TYPE (type)); 607 char *name; 608 if (TYPE_CODE (ttype) != TYPE_CODE_STRUCT) 609 return 0; 610 while (TYPE_N_BASECLASSES (ttype) > 0) 611 ttype = TYPE_BASECLASS (ttype, 0); 612 name = TYPE_TAG_NAME (ttype); 613 if (name != NULL && strcmp (name, "java.lang.Object") == 0) 614 return 1; 615 name = TYPE_NFIELDS (ttype) > 0 ? TYPE_FIELD_NAME (ttype, 0) : (char *) 0; 616 if (name != NULL && strcmp (name, "vtable") == 0) 617 { 618 if (java_object_type == NULL) 619 java_object_type = type; 620 return 1; 621 } 622 } 623 return 0; 624} 625 626struct type * 627java_primitive_type (int signature) 628{ 629 switch (signature) 630 { 631 case 'B': 632 return java_byte_type; 633 case 'S': 634 return java_short_type; 635 case 'I': 636 return java_int_type; 637 case 'J': 638 return java_long_type; 639 case 'Z': 640 return java_boolean_type; 641 case 'C': 642 return java_char_type; 643 case 'F': 644 return java_float_type; 645 case 'D': 646 return java_double_type; 647 case 'V': 648 return java_void_type; 649 } 650 error ("unknown signature '%c' for primitive type", (char) signature); 651} 652 653/* If name[0 .. namelen-1] is the name of a primitive Java type, 654 return that type. Otherwise, return NULL. */ 655 656struct type * 657java_primitive_type_from_name (char *name, int namelen) 658{ 659 switch (name[0]) 660 { 661 case 'b': 662 if (namelen == 4 && memcmp (name, "byte", 4) == 0) 663 return java_byte_type; 664 if (namelen == 7 && memcmp (name, "boolean", 7) == 0) 665 return java_boolean_type; 666 break; 667 case 'c': 668 if (namelen == 4 && memcmp (name, "char", 4) == 0) 669 return java_char_type; 670 case 'd': 671 if (namelen == 6 && memcmp (name, "double", 6) == 0) 672 return java_double_type; 673 break; 674 case 'f': 675 if (namelen == 5 && memcmp (name, "float", 5) == 0) 676 return java_float_type; 677 break; 678 case 'i': 679 if (namelen == 3 && memcmp (name, "int", 3) == 0) 680 return java_int_type; 681 break; 682 case 'l': 683 if (namelen == 4 && memcmp (name, "long", 4) == 0) 684 return java_long_type; 685 break; 686 case 's': 687 if (namelen == 5 && memcmp (name, "short", 5) == 0) 688 return java_short_type; 689 break; 690 case 'v': 691 if (namelen == 4 && memcmp (name, "void", 4) == 0) 692 return java_void_type; 693 break; 694 } 695 return NULL; 696} 697 698/* Return the length (in bytes) of demangled name of the Java type 699 signature string SIGNATURE. */ 700 701static int 702java_demangled_signature_length (char *signature) 703{ 704 int array = 0; 705 for (; *signature == '['; signature++) 706 array += 2; /* Two chars for "[]". */ 707 switch (signature[0]) 708 { 709 case 'L': 710 /* Subtract 2 for 'L' and ';'. */ 711 return strlen (signature) - 2 + array; 712 default: 713 return strlen (TYPE_NAME (java_primitive_type (signature[0]))) + array; 714 } 715} 716 717/* Demangle the Java type signature SIGNATURE, leaving the result in RESULT. */ 718 719static void 720java_demangled_signature_copy (char *result, char *signature) 721{ 722 int array = 0; 723 char *ptr; 724 int i; 725 while (*signature == '[') 726 { 727 array++; 728 signature++; 729 } 730 switch (signature[0]) 731 { 732 case 'L': 733 /* Subtract 2 for 'L' and ';', but add 1 for final nul. */ 734 signature++; 735 ptr = result; 736 for (; *signature != ';' && *signature != '\0'; signature++) 737 { 738 if (*signature == '/') 739 *ptr++ = '.'; 740 else 741 *ptr++ = *signature; 742 } 743 break; 744 default: 745 ptr = TYPE_NAME (java_primitive_type (signature[0])); 746 i = strlen (ptr); 747 strcpy (result, ptr); 748 ptr = result + i; 749 break; 750 } 751 while (--array >= 0) 752 { 753 *ptr++ = '['; 754 *ptr++ = ']'; 755 } 756} 757 758/* Return the demangled name of the Java type signature string SIGNATURE, 759 as a freshly allocated copy. */ 760 761char * 762java_demangle_type_signature (char *signature) 763{ 764 int length = java_demangled_signature_length (signature); 765 char *result = xmalloc (length + 1); 766 java_demangled_signature_copy (result, signature); 767 result[length] = '\0'; 768 return result; 769} 770 771struct type * 772java_lookup_type (char *signature) 773{ 774 switch (signature[0]) 775 { 776 case 'L': 777 case '[': 778 error ("java_lookup_type not fully implemented"); 779 default: 780 return java_primitive_type (signature[0]); 781 } 782} 783 784/* Return the type of TYPE followed by DIMS pairs of [ ]. 785 If DIMS == 0, TYPE is returned. */ 786 787struct type * 788java_array_type (struct type *type, int dims) 789{ 790 struct type *range_type; 791 792 while (dims-- > 0) 793 { 794 range_type = create_range_type (NULL, builtin_type_int, 0, 0); 795 /* FIXME This is bogus! Java arrays are not gdb arrays! */ 796 type = create_array_type (NULL, type, range_type); 797 } 798 799 return type; 800} 801 802/* Create a Java string in the inferior from a (Utf8) literal. */ 803 804static struct value * 805java_value_string (char *ptr, int len) 806{ 807 error ("not implemented - java_value_string"); /* FIXME */ 808} 809 810/* Print the character C on STREAM as part of the contents of a literal 811 string whose delimiter is QUOTER. Note that that format for printing 812 characters and strings is language specific. */ 813 814static void 815java_emit_char (int c, struct ui_file *stream, int quoter) 816{ 817 switch (c) 818 { 819 case '\\': 820 case '\'': 821 fprintf_filtered (stream, "\\%c", c); 822 break; 823 case '\b': 824 fputs_filtered ("\\b", stream); 825 break; 826 case '\t': 827 fputs_filtered ("\\t", stream); 828 break; 829 case '\n': 830 fputs_filtered ("\\n", stream); 831 break; 832 case '\f': 833 fputs_filtered ("\\f", stream); 834 break; 835 case '\r': 836 fputs_filtered ("\\r", stream); 837 break; 838 default: 839 if (isprint (c)) 840 fputc_filtered (c, stream); 841 else 842 fprintf_filtered (stream, "\\u%.4x", (unsigned int) c); 843 break; 844 } 845} 846 847static struct value * 848evaluate_subexp_java (struct type *expect_type, register struct expression *exp, 849 register int *pos, enum noside noside) 850{ 851 int pc = *pos; 852 int i; 853 char *name; 854 enum exp_opcode op = exp->elts[*pos].opcode; 855 struct value *arg1; 856 struct value *arg2; 857 struct type *type; 858 switch (op) 859 { 860 case UNOP_IND: 861 if (noside == EVAL_SKIP) 862 goto standard; 863 (*pos)++; 864 arg1 = evaluate_subexp_java (NULL_TYPE, exp, pos, EVAL_NORMAL); 865 if (is_object_type (VALUE_TYPE (arg1))) 866 { 867 struct type *type; 868 869 type = type_from_class (java_class_from_object (arg1)); 870 arg1 = value_cast (lookup_pointer_type (type), arg1); 871 } 872 if (noside == EVAL_SKIP) 873 goto nosideret; 874 return value_ind (arg1); 875 876 case BINOP_SUBSCRIPT: 877 (*pos)++; 878 arg1 = evaluate_subexp_with_coercion (exp, pos, noside); 879 arg2 = evaluate_subexp_with_coercion (exp, pos, noside); 880 if (noside == EVAL_SKIP) 881 goto nosideret; 882 /* If the user attempts to subscript something that is not an 883 array or pointer type (like a plain int variable for example), 884 then report this as an error. */ 885 886 COERCE_REF (arg1); 887 type = check_typedef (VALUE_TYPE (arg1)); 888 if (TYPE_CODE (type) == TYPE_CODE_PTR) 889 type = check_typedef (TYPE_TARGET_TYPE (type)); 890 name = TYPE_NAME (type); 891 if (name == NULL) 892 name = TYPE_TAG_NAME (type); 893 i = name == NULL ? 0 : strlen (name); 894 if (TYPE_CODE (type) == TYPE_CODE_STRUCT 895 && i > 2 && name[i - 1] == ']') 896 { 897 CORE_ADDR address; 898 long length, index; 899 struct type *el_type; 900 char buf4[4]; 901 902 struct value *clas = java_class_from_object (arg1); 903 struct value *temp = clas; 904 /* Get CLASS_ELEMENT_TYPE of the array type. */ 905 temp = value_struct_elt (&temp, NULL, "methods", 906 NULL, "structure"); 907 VALUE_TYPE (temp) = VALUE_TYPE (clas); 908 el_type = type_from_class (temp); 909 if (TYPE_CODE (el_type) == TYPE_CODE_STRUCT) 910 el_type = lookup_pointer_type (el_type); 911 912 if (noside == EVAL_AVOID_SIDE_EFFECTS) 913 return value_zero (el_type, VALUE_LVAL (arg1)); 914 address = value_as_address (arg1); 915 address += JAVA_OBJECT_SIZE; 916 read_memory (address, buf4, 4); 917 length = (long) extract_signed_integer (buf4, 4); 918 index = (long) value_as_long (arg2); 919 if (index >= length || index < 0) 920 error ("array index (%ld) out of bounds (length: %ld)", 921 index, length); 922 address = (address + 4) + index * TYPE_LENGTH (el_type); 923 return value_at (el_type, address, NULL); 924 } 925 else if (TYPE_CODE (type) == TYPE_CODE_ARRAY) 926 { 927 if (noside == EVAL_AVOID_SIDE_EFFECTS) 928 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1)); 929 else 930 return value_subscript (arg1, arg2); 931 } 932 if (name) 933 error ("cannot subscript something of type `%s'", name); 934 else 935 error ("cannot subscript requested type"); 936 937 case OP_STRING: 938 (*pos)++; 939 i = longest_to_int (exp->elts[pc + 1].longconst); 940 (*pos) += 3 + BYTES_TO_EXP_ELEM (i + 1); 941 if (noside == EVAL_SKIP) 942 goto nosideret; 943 return java_value_string (&exp->elts[pc + 2].string, i); 944 945 case STRUCTOP_STRUCT: 946 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside); 947 /* Convert object field (such as TYPE.class) to reference. */ 948 if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_STRUCT) 949 arg1 = value_addr (arg1); 950 return arg1; 951 default: 952 break; 953 } 954standard: 955 return evaluate_subexp_standard (expect_type, exp, pos, noside); 956nosideret: 957 return value_from_longest (builtin_type_long, (LONGEST) 1); 958} 959 960static struct type * 961java_create_fundamental_type (struct objfile *objfile, int typeid) 962{ 963 switch (typeid) 964 { 965 case FT_VOID: 966 return java_void_type; 967 case FT_BOOLEAN: 968 return java_boolean_type; 969 case FT_CHAR: 970 return java_char_type; 971 case FT_FLOAT: 972 return java_float_type; 973 case FT_DBL_PREC_FLOAT: 974 return java_double_type; 975 case FT_BYTE: 976 case FT_SIGNED_CHAR: 977 return java_byte_type; 978 case FT_SHORT: 979 case FT_SIGNED_SHORT: 980 return java_short_type; 981 case FT_INTEGER: 982 case FT_SIGNED_INTEGER: 983 return java_int_type; 984 case FT_LONG: 985 case FT_SIGNED_LONG: 986 return java_long_type; 987 } 988 return c_create_fundamental_type (objfile, typeid); 989} 990 991/* Table mapping opcodes into strings for printing operators 992 and precedences of the operators. */ 993 994const struct op_print java_op_print_tab[] = 995{ 996 {",", BINOP_COMMA, PREC_COMMA, 0}, 997 {"=", BINOP_ASSIGN, PREC_ASSIGN, 1}, 998 {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, 999 {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, 1000 {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0}, 1001 {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0}, 1002 {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0}, 1003 {"==", BINOP_EQUAL, PREC_EQUAL, 0}, 1004 {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0}, 1005 {"<=", BINOP_LEQ, PREC_ORDER, 0}, 1006 {">=", BINOP_GEQ, PREC_ORDER, 0}, 1007 {">", BINOP_GTR, PREC_ORDER, 0}, 1008 {"<", BINOP_LESS, PREC_ORDER, 0}, 1009 {">>", BINOP_RSH, PREC_SHIFT, 0}, 1010 {"<<", BINOP_LSH, PREC_SHIFT, 0}, 1011#if 0 1012 {">>>", BINOP_ ? ? ?, PREC_SHIFT, 0}, 1013#endif 1014 {"+", BINOP_ADD, PREC_ADD, 0}, 1015 {"-", BINOP_SUB, PREC_ADD, 0}, 1016 {"*", BINOP_MUL, PREC_MUL, 0}, 1017 {"/", BINOP_DIV, PREC_MUL, 0}, 1018 {"%", BINOP_REM, PREC_MUL, 0}, 1019 {"-", UNOP_NEG, PREC_PREFIX, 0}, 1020 {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, 1021 {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0}, 1022 {"*", UNOP_IND, PREC_PREFIX, 0}, 1023#if 0 1024 {"instanceof", ? ? ?, ? ? ?, 0}, 1025#endif 1026 {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0}, 1027 {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0}, 1028 {NULL, 0, 0, 0} 1029}; 1030 1031const struct language_defn java_language_defn = 1032{ 1033 "java", /* Language name */ 1034 language_java, 1035 c_builtin_types, 1036 range_check_off, 1037 type_check_off, 1038 case_sensitive_on, 1039 java_parse, 1040 java_error, 1041 evaluate_subexp_java, 1042 c_printchar, /* Print a character constant */ 1043 c_printstr, /* Function to print string constant */ 1044 java_emit_char, /* Function to print a single character */ 1045 java_create_fundamental_type, /* Create fundamental type in this language */ 1046 java_print_type, /* Print a type using appropriate syntax */ 1047 java_val_print, /* Print a value using appropriate syntax */ 1048 java_value_print, /* Print a top-level value */ 1049 {"", "", "", ""}, /* Binary format info */ 1050 {"0%lo", "0", "o", ""}, /* Octal format info */ 1051 {"%ld", "", "d", ""}, /* Decimal format info */ 1052 {"0x%lx", "0x", "x", ""}, /* Hex format info */ 1053 java_op_print_tab, /* expression operators for printing */ 1054 0, /* not c-style arrays */ 1055 0, /* String lower bound */ 1056 &builtin_type_char, /* Type of string elements */ 1057 LANG_MAGIC 1058}; 1059 1060void 1061_initialize_java_language (void) 1062{ 1063 1064 java_int_type = init_type (TYPE_CODE_INT, 4, 0, "int", NULL); 1065 java_short_type = init_type (TYPE_CODE_INT, 2, 0, "short", NULL); 1066 java_long_type = init_type (TYPE_CODE_INT, 8, 0, "long", NULL); 1067 java_byte_type = init_type (TYPE_CODE_INT, 1, 0, "byte", NULL); 1068 java_boolean_type = init_type (TYPE_CODE_BOOL, 1, 0, "boolean", NULL); 1069 java_char_type = init_type (TYPE_CODE_CHAR, 2, TYPE_FLAG_UNSIGNED, "char", NULL); 1070 java_float_type = init_type (TYPE_CODE_FLT, 4, 0, "float", NULL); 1071 java_double_type = init_type (TYPE_CODE_FLT, 8, 0, "double", NULL); 1072 java_void_type = init_type (TYPE_CODE_VOID, 1, 0, "void", NULL); 1073 1074 add_language (&java_language_defn); 1075} 1076 1077/* Cleanup code that should be run on every "run". 1078 We should use make_run_cleanup to have this be called. 1079 But will that mess up values in value histry? FIXME */ 1080 1081extern void java_rerun_cleanup (void); 1082void 1083java_rerun_cleanup (void) 1084{ 1085 if (class_symtab != NULL) 1086 { 1087 free_symtab (class_symtab); /* ??? */ 1088 class_symtab = NULL; 1089 } 1090 if (dynamics_objfile != NULL) 1091 { 1092 free_objfile (dynamics_objfile); 1093 dynamics_objfile = NULL; 1094 } 1095 1096 java_object_type = NULL; 1097} 1098