1 /* Java language support routines for GDB, the GNU debugger.
2 Copyright 1997 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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, Boston, MA 02111-1307, USA. */
23 #include "expression.h"
24 #include "parser-defs.h"
30 #include "gdb_string.h"
36 struct type *java_int_type;
37 struct type *java_byte_type;
38 struct type *java_short_type;
39 struct type *java_long_type;
40 struct type *java_boolean_type;
41 struct type *java_char_type;
42 struct type *java_float_type;
43 struct type *java_double_type;
44 struct type *java_void_type;
46 struct type *java_object_type;
48 /* This objfile contains symtabs that have been dynamically created
49 to record dynamically loaded Java classes and dynamically
50 compiled java methods. */
51 struct objfile *dynamics_objfile = NULL;
53 struct type *java_link_class_type PARAMS((struct type*, value_ptr));
56 get_dynamics_objfile ()
58 if (dynamics_objfile == NULL)
60 dynamics_objfile = allocate_objfile (NULL, 0);
62 return dynamics_objfile;
66 /* symtab contains classes read from the inferior. */
68 static struct symtab *class_symtab = NULL;
70 /* Maximum number of class in class_symtab before relocation is needed. */
72 static int class_symtab_space;
75 get_java_class_symtab ()
77 if (class_symtab == NULL)
79 struct objfile *objfile = get_dynamics_objfile();
80 struct blockvector *bv;
82 class_symtab = allocate_symtab ("<java-classes>", objfile);
83 class_symtab->language = language_java;
84 bv = (struct blockvector *)
85 obstack_alloc (&objfile->symbol_obstack, sizeof (struct blockvector));
86 BLOCKVECTOR_NBLOCKS (bv) = 1;
87 BLOCKVECTOR (class_symtab) = bv;
89 /* Allocate dummy STATIC_BLOCK. */
91 obstack_alloc (&objfile->symbol_obstack, sizeof (struct block));
95 BLOCK_FUNCTION (bl) = NULL;
96 BLOCK_SUPERBLOCK (bl) = NULL;
97 BLOCK_GCC_COMPILED (bl) = 0;
98 BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = bl;
100 /* Allocate GLOBAL_BLOCK. This has to be relocatable. */
101 class_symtab_space = 128;
102 bl = (struct block *)
103 mmalloc (objfile->md,
104 sizeof (struct block)
105 + ((class_symtab_space - 1) * sizeof (struct symbol *)));
106 *bl = *BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
107 BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
108 class_symtab->free_ptr = (char *) bl;
114 add_class_symtab_symbol (sym)
117 struct symtab *symtab = get_java_class_symtab ();
118 struct blockvector *bv = BLOCKVECTOR (symtab);
119 struct block *bl = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
120 if (BLOCK_NSYMS (bl) >= class_symtab_space)
122 /* Need to re-allocate. */
123 class_symtab_space *= 2;
124 bl = (struct block *)
125 mrealloc (symtab->objfile->md, bl,
126 sizeof (struct block)
127 + ((class_symtab_space - 1) * sizeof (struct symbol *)));
128 class_symtab->free_ptr = (char *) bl;
129 BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
132 BLOCK_SYM (bl, BLOCK_NSYMS (bl)) = sym;
133 BLOCK_NSYMS (bl) = BLOCK_NSYMS (bl) + 1;
137 add_class_symbol (type, addr)
142 sym = (struct symbol *)
143 obstack_alloc (&dynamics_objfile->symbol_obstack, sizeof (struct symbol));
144 memset (sym, 0, sizeof (struct symbol));
145 SYMBOL_LANGUAGE (sym) = language_java;
146 SYMBOL_NAME (sym) = TYPE_NAME (type);
147 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
148 /* SYMBOL_VALUE (sym) = valu;*/
149 SYMBOL_TYPE (sym) = type;
150 SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
151 SYMBOL_VALUE_ADDRESS (sym) = addr;
157 java_lookup_class (name)
161 sym = lookup_symbol (name, expression_context_block, STRUCT_NAMESPACE,
162 (int *) 0, (struct symtab **) NULL);
164 return SYMBOL_TYPE (sym);
167 if (called from parser)
169 call lookup_class (or similar) in inferior;
172 addr = found in inferior;
177 type = alloc_type (objfile);
178 TYPE_CODE (type) = TYPE_CODE_STRUCT;
179 INIT_CPLUS_SPECIFIC (type);
180 TYPE_NAME (type) = obsavestring (name, strlen(name), &objfile->type_obstack);
181 TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
185 /* FIXME - should search inferior's symbol table. */
190 /* Return a nul-terminated string (allocated on OBSTACK) for
191 a name given by NAME (which has type Utf8Const*). */
194 get_java_utf8_name (obstack, name)
195 struct obstack *obstack;
199 value_ptr temp = name;
202 temp = value_struct_elt (&temp, NULL, "length", NULL, "structure");
203 name_length = (int) value_as_long (temp);
204 data_addr = VALUE_ADDRESS (temp) + VALUE_OFFSET (temp)
205 + TYPE_LENGTH (VALUE_TYPE (temp));
206 chrs = obstack_alloc (obstack, name_length+1);
207 chrs [name_length] = '\0';
208 read_memory_section (data_addr, chrs, name_length, NULL);
213 java_class_from_object (obj_val)
216 value_ptr dtable_val = value_struct_elt (&obj_val, NULL, "dtable", NULL, "structure");
217 return value_struct_elt (&dtable_val, NULL, "class", NULL, "structure");
220 /* Check if CLASS_IS_PRIMITIVE(value of clas): */
222 java_class_is_primitive (clas)
225 value_ptr dtable = value_struct_elt (&clas, NULL, "dtable", NULL, "struct");
226 CORE_ADDR i = value_as_pointer (dtable);
227 return (int) (i & 0x7fffffff) == (int) 0x7fffffff;
230 /* Read a Kaffe Class object, and generated a gdb (TYPE_CODE_STRUCT) type. */
233 type_from_class (clas)
239 struct objfile *objfile = get_dynamics_objfile();
247 type = check_typedef (VALUE_TYPE (clas));
248 if (TYPE_CODE (type) == TYPE_CODE_PTR)
250 if (value_logical_not (clas))
252 clas = value_ind (clas);
254 addr = VALUE_ADDRESS (clas) + VALUE_OFFSET (clas);
256 get_java_class_symtab ();
257 bl = BLOCKVECTOR_BLOCK (BLOCKVECTOR (class_symtab), GLOBAL_BLOCK);
258 for (i = BLOCK_NSYMS (bl); --i >= 0; )
260 struct symbol *sym = BLOCK_SYM (bl, i);
261 if (SYMBOL_VALUE_ADDRESS (sym) == addr)
262 return SYMBOL_TYPE (sym);
265 if (java_class_is_primitive (clas))
269 sig = value_struct_elt (&temp, NULL, "msize", NULL, "structure");
270 return java_primitive_type (value_as_long (sig));
273 /* Get Class name. */
274 /* if clasloader non-null, prepend loader address. FIXME */
276 utf8_name = value_struct_elt (&temp, NULL, "name", NULL, "structure");
277 name = get_java_utf8_name (&objfile->type_obstack, utf8_name);
279 type = alloc_type (objfile);
280 TYPE_CODE (type) = TYPE_CODE_STRUCT;
281 INIT_CPLUS_SPECIFIC (type);
287 /* Set array element type. */
288 temp = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
289 VALUE_TYPE (temp) = lookup_pointer_type (VALUE_TYPE (clas));
290 TYPE_TARGET_TYPE (type) = type_from_class (temp);
292 for (nptr = name; *nptr != 0; nptr++)
298 ALLOCATE_CPLUS_STRUCT_TYPE (type);
299 TYPE_NAME (type) = name;
301 add_class_symtab_symbol (add_class_symbol (type, addr));
302 return java_link_class_type (type, clas);
305 /* Fill in class TYPE with data from the CLAS value. */
308 java_link_class_type (type, clas)
313 char *unqualified_name;
314 char *name = TYPE_NAME (type);
315 int ninterfaces, nfields, nmethods;
316 int type_is_object = 0;
317 struct fn_field *fn_fields;
318 struct fn_fieldlist *fn_fieldlists;
319 value_ptr fields, field, method, methods;
321 struct objfile *objfile = get_dynamics_objfile();
324 unqualified_name = strrchr (name, '.');
325 if (unqualified_name == NULL)
326 unqualified_name = name;
329 temp = value_struct_elt (&temp, NULL, "superclass", NULL, "structure");
330 if (name != NULL && strcmp (name, "java.lang.Object") == 0)
332 tsuper = get_java_object_type ();
333 if (tsuper && TYPE_CODE (tsuper) == TYPE_CODE_PTR)
334 tsuper = TYPE_TARGET_TYPE (tsuper);
338 tsuper = type_from_class (temp);
344 ninterfaces = value_as_long (value_struct_elt (&temp, NULL, "interface_len", NULL, "structure"));
346 TYPE_N_BASECLASSES (type) = (tsuper == NULL ? 0 : 1) + ninterfaces;
348 nfields = value_as_long (value_struct_elt (&temp, NULL, "nfields", NULL, "structure"));
349 nfields += TYPE_N_BASECLASSES (type);
350 TYPE_NFIELDS (type) = nfields;
351 TYPE_FIELDS (type) = (struct field *)
352 TYPE_ALLOC (type, sizeof (struct field) * nfields);
354 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
356 TYPE_FIELD_PRIVATE_BITS (type) =
357 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
358 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
360 TYPE_FIELD_PROTECTED_BITS (type) =
361 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
362 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
364 TYPE_FIELD_IGNORE_BITS (type) =
365 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
366 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
368 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
369 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
370 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
374 TYPE_BASECLASS (type, 0) = tsuper;
376 SET_TYPE_FIELD_PRIVATE (type, 0);
381 temp = value_struct_elt (&temp, NULL, "bfsize", NULL, "structure");
382 TYPE_LENGTH (type) = value_as_long (temp);
385 for (i = TYPE_N_BASECLASSES (type); i < nfields; i++)
392 fields = value_struct_elt (&temp, NULL, "fields", NULL, "structure");
393 field = value_ind (fields);
396 { /* Re-use field value for next field. */
397 VALUE_ADDRESS (field) += TYPE_LENGTH (VALUE_TYPE (field));
398 VALUE_LAZY (field) = 1;
401 temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
402 TYPE_FIELD_NAME (type, i) =
403 get_java_utf8_name (&objfile->type_obstack, temp);
405 accflags = value_as_long (value_struct_elt (&temp, NULL, "accflags",
408 temp = value_struct_elt (&temp, NULL, "info", NULL, "structure");
409 boffset = value_as_long (value_struct_elt (&temp, NULL, "boffset",
411 if (accflags & 0x0001) /* public access */
415 if (accflags & 0x0002) /* private access */
417 SET_TYPE_FIELD_PRIVATE (type, i);
419 if (accflags & 0x0004) /* protected access */
421 SET_TYPE_FIELD_PROTECTED (type, i);
423 if (accflags & 0x0008) /* ACC_STATIC */
424 SET_FIELD_PHYSADDR(TYPE_FIELD(type, i), boffset);
426 TYPE_FIELD_BITPOS (type, i) = 8 * boffset;
427 if (accflags & 0x8000) /* FIELD_UNRESOLVED_FLAG */
429 TYPE_FIELD_TYPE (type, i) = get_java_object_type (); /* FIXME */
435 temp = value_struct_elt (&temp, NULL, "type", NULL, "structure");
436 ftype = type_from_class (temp);
437 if (TYPE_CODE (ftype) == TYPE_CODE_STRUCT)
438 ftype = lookup_pointer_type (ftype);
439 TYPE_FIELD_TYPE (type, i) = ftype;
444 nmethods = value_as_long (value_struct_elt (&temp, NULL, "nmethods",
446 TYPE_NFN_FIELDS_TOTAL (type) = nmethods;
447 j = nmethods * sizeof (struct fn_field);
448 fn_fields = (struct fn_field*)
449 obstack_alloc (&dynamics_objfile->symbol_obstack, j);
450 memset (fn_fields, 0, j);
451 fn_fieldlists = (struct fn_fieldlist*)
452 alloca (nmethods * sizeof (struct fn_fieldlist));
455 for (i = 0; i < nmethods; i++)
462 methods = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
463 method = value_ind (methods);
466 { /* Re-use method value for next method. */
467 VALUE_ADDRESS (method) += TYPE_LENGTH (VALUE_TYPE (method));
468 VALUE_LAZY (method) = 1;
471 /* Get method name. */
473 temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
474 mname = get_java_utf8_name (&objfile->type_obstack, temp);
475 if (strcmp (mname, "<init>") == 0)
476 mname = unqualified_name;
478 /* Check for an existing method with the same name.
479 * This makes building the fn_fieldslists an O(nmethods**2)
480 * operation. That could be using hashing, but I doubt it
481 * is worth it. Note that we do maintain the order of methods
482 * in the inferior's Method table (as long as that is grouped
483 * by method name), which I think is desirable. --PB */
484 for (k = 0, j = TYPE_NFN_FIELDS (type); ; )
487 { /* No match - new method name. */
488 j = TYPE_NFN_FIELDS(type)++;
489 fn_fieldlists[j].name = mname;
490 fn_fieldlists[j].length = 1;
491 fn_fieldlists[j].fn_fields = &fn_fields[i];
495 if (strcmp (mname, fn_fieldlists[j].name) == 0)
496 { /* Found an existing method with the same name. */
498 if (mname != unqualified_name)
499 obstack_free (&objfile->type_obstack, mname);
500 mname = fn_fieldlists[j].name;
501 fn_fieldlists[j].length++;
502 k = i - k; /* Index of new slot. */
503 /* Shift intervening fn_fields (between k and i) down. */
504 for (l = i; l > k; l--) fn_fields[l] = fn_fields[l-1];
505 for (l = TYPE_NFN_FIELDS (type); --l > j; )
506 fn_fieldlists[l].fn_fields++;
509 k += fn_fieldlists[j].length;
511 fn_fields[k].physname = "";
512 fn_fields[k].is_stub = 1;
513 fn_fields[k].type = make_function_type (java_void_type, NULL); /* FIXME*/
514 TYPE_CODE (fn_fields[k].type) = TYPE_CODE_METHOD;
517 j = TYPE_NFN_FIELDS(type) * sizeof (struct fn_fieldlist);
518 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist*)
519 obstack_alloc (&dynamics_objfile->symbol_obstack, j);
520 memcpy (TYPE_FN_FIELDLISTS (type), fn_fieldlists, j);
526 get_java_object_type ()
528 return java_object_type;
532 is_object_type (type)
535 CHECK_TYPEDEF (type);
536 if (TYPE_CODE (type) == TYPE_CODE_PTR)
538 struct type *ttype = check_typedef (TYPE_TARGET_TYPE (type));
540 if (TYPE_CODE (ttype) != TYPE_CODE_STRUCT)
542 while (TYPE_N_BASECLASSES (ttype) > 0)
543 ttype = TYPE_BASECLASS (ttype, 0);
544 name = TYPE_NAME (ttype);
545 if (name != NULL && strcmp (name, "java.lang.Object") == 0)
547 name = TYPE_NFIELDS (ttype) > 0 ? TYPE_FIELD_NAME (ttype, 0) : (char*)0;
548 if (name != NULL && strcmp (name, "dtable") == 0)
550 if (java_object_type == NULL)
551 java_object_type = type;
559 java_primitive_type (signature)
564 case 'B': return java_byte_type;
565 case 'S': return java_short_type;
566 case 'I': return java_int_type;
567 case 'J': return java_long_type;
568 case 'Z': return java_boolean_type;
569 case 'C': return java_char_type;
570 case 'F': return java_float_type;
571 case 'D': return java_double_type;
572 case 'V': return java_void_type;
574 error ("unknown signature '%c' for primitive type", (char) signature);
577 /* Return the type of TYPE followed by DIMS pairs of [ ].
578 If DIMS == 0, TYPE is returned. */
581 java_array_type (type, dims)
587 error ("array types not implemented");
590 /* Create a Java string in the inferior from a (Utf8) literal. */
593 java_value_string (ptr, len)
597 error ("not implemented - java_value_string"); /* FIXME */
601 evaluate_subexp_java (expect_type, exp, pos, noside)
602 struct type *expect_type;
603 register struct expression *exp;
609 enum exp_opcode op = exp->elts[*pos].opcode;
614 if (noside == EVAL_SKIP)
617 arg1 = evaluate_subexp_standard (expect_type, exp, pos, EVAL_NORMAL);
618 if (is_object_type (VALUE_TYPE (arg1)))
620 struct type *type = type_from_class (java_class_from_object (arg1));
621 arg1 = value_cast (lookup_pointer_type (type), arg1);
623 if (noside == EVAL_SKIP)
625 return value_ind (arg1);
628 i = longest_to_int (exp->elts[pc + 1].longconst);
629 (*pos) += 3 + BYTES_TO_EXP_ELEM (i + 1);
630 if (noside == EVAL_SKIP)
632 return java_value_string (&exp->elts[pc + 2].string, i);
637 return evaluate_subexp_standard (expect_type, exp, pos, noside);
639 return value_from_longest (builtin_type_long, (LONGEST) 1);
643 java_create_fundamental_type (objfile, typeid)
644 struct objfile *objfile;
649 case FT_VOID: return java_void_type;
650 case FT_BOOLEAN: return java_boolean_type;
651 case FT_CHAR: return java_char_type;
652 case FT_FLOAT: return java_float_type;
653 case FT_DBL_PREC_FLOAT: return java_double_type;
654 case FT_BYTE: case FT_SIGNED_CHAR: return java_byte_type;
655 case FT_SHORT: case FT_SIGNED_SHORT: return java_short_type;
656 case FT_INTEGER: case FT_SIGNED_INTEGER: return java_int_type;
657 case FT_LONG: case FT_SIGNED_LONG: return java_long_type;
659 return c_create_fundamental_type (objfile, typeid);
662 /* Table mapping opcodes into strings for printing operators
663 and precedences of the operators. */
665 const struct op_print java_op_print_tab[] =
667 {",", BINOP_COMMA, PREC_COMMA, 0},
668 {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
669 {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
670 {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
671 {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
672 {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
673 {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
674 {"==", BINOP_EQUAL, PREC_EQUAL, 0},
675 {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
676 {"<=", BINOP_LEQ, PREC_ORDER, 0},
677 {">=", BINOP_GEQ, PREC_ORDER, 0},
678 {">", BINOP_GTR, PREC_ORDER, 0},
679 {"<", BINOP_LESS, PREC_ORDER, 0},
680 {">>", BINOP_RSH, PREC_SHIFT, 0},
681 {"<<", BINOP_LSH, PREC_SHIFT, 0},
683 {">>>", BINOP_???, PREC_SHIFT, 0},
685 {"+", BINOP_ADD, PREC_ADD, 0},
686 {"-", BINOP_SUB, PREC_ADD, 0},
687 {"*", BINOP_MUL, PREC_MUL, 0},
688 {"/", BINOP_DIV, PREC_MUL, 0},
689 {"%", BINOP_REM, PREC_MUL, 0},
690 {"-", UNOP_NEG, PREC_PREFIX, 0},
691 {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
692 {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
693 {"*", UNOP_IND, PREC_PREFIX, 0},
695 {"instanceof", ???, ???, 0},
697 {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
698 {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
702 const struct language_defn java_language_defn = {
703 "java", /* Language name */
710 evaluate_subexp_java,
711 c_printchar, /* Print a character constant */
712 c_printstr, /* Function to print string constant */
713 java_create_fundamental_type, /* Create fundamental type in this language */
714 java_print_type, /* Print a type using appropriate syntax */
715 java_val_print, /* Print a value using appropriate syntax */
716 java_value_print, /* Print a top-level value */
717 {"", "", "", ""}, /* Binary format info */
718 {"0%lo", "0", "o", ""}, /* Octal format info */
719 {"%ld", "", "d", ""}, /* Decimal format info */
720 {"0x%lx", "0x", "x", ""}, /* Hex format info */
721 java_op_print_tab, /* expression operators for printing */
722 1, /* c-style arrays */
723 0, /* String lower bound */
724 &builtin_type_char, /* Type of string elements */
729 _initialize_jave_language ()
732 java_int_type = init_type (TYPE_CODE_INT, 4, 0, "int", NULL);
733 java_short_type = init_type (TYPE_CODE_INT, 2, 0, "short", NULL);
734 java_long_type = init_type (TYPE_CODE_INT, 8, 0, "long", NULL);
735 java_byte_type = init_type (TYPE_CODE_INT, 1, 0, "byte", NULL);
736 java_boolean_type= init_type (TYPE_CODE_BOOL, 1, 0, "boolean", NULL);
737 java_char_type = init_type (TYPE_CODE_CHAR, 2, 0, "char", NULL);
738 java_float_type = init_type (TYPE_CODE_FLT, 4, 0, "float", NULL);
739 java_double_type = init_type (TYPE_CODE_FLT, 8, 0, "double", NULL);
740 java_void_type = init_type (TYPE_CODE_VOID, 1, 0, "void", NULL);
742 add_language (&java_language_defn);
745 /* Cleanup code that should be urn on every "run".
746 We need some hook to have this actually be called ... FIXME */
748 void java_rerun_cleanup ()
750 if (class_symtab != NULL)
752 free_symtab (class_symtab); /* ??? */
755 if (dynamics_objfile != NULL)
757 free_objfile (dynamics_objfile);
758 dynamics_objfile = NULL;
761 java_object_type = NULL;