1 /* Java language support routines for GDB, the GNU debugger.
3 Copyright (C) 1997-2000, 2003-2005, 2007-2012 Free Software
6 This file is part of GDB.
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.
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.
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/>. */
24 #include "expression.h"
25 #include "parser-defs.h"
31 #include "gdb_string.h"
38 #include "dictionary.h"
40 #include "gdb_assert.h"
46 extern void _initialize_java_language (void);
48 static int java_demangled_signature_length (const char *);
49 static void java_demangled_signature_copy (char *, const char *);
51 static struct symtab *get_java_class_symtab (struct gdbarch *gdbarch);
52 static char *get_java_utf8_name (struct obstack *obstack, struct value *name);
53 static int java_class_is_primitive (struct value *clas);
54 static struct value *java_value_string (char *ptr, int len);
56 static void java_emit_char (int c, struct type *type,
57 struct ui_file * stream, int quoter);
59 static char *java_class_name_from_physname (const char *physname);
61 static const struct objfile_data *jv_dynamics_objfile_data_key;
63 /* The dynamic objfile is kept per-program-space. This key lets us
64 associate the objfile with the program space. */
66 static const struct program_space_data *jv_dynamics_progspace_key;
68 static struct type *java_link_class_type (struct gdbarch *,
69 struct type *, struct value *);
71 /* An instance of this structure is used to store some data that must
74 struct jv_per_objfile_data
76 /* The expandable dictionary we use. */
77 struct dictionary *dict;
80 /* A function called when the dynamics_objfile is freed. We use this
81 to clean up some internal state. */
83 jv_per_objfile_free (struct objfile *objfile, void *data)
85 struct jv_per_objfile_data *jv_data = data;
86 struct objfile *dynamics_objfile;
88 dynamics_objfile = program_space_data (current_program_space,
89 jv_dynamics_progspace_key);
90 gdb_assert (objfile == dynamics_objfile);
93 dict_free (jv_data->dict);
96 set_program_space_data (current_program_space,
97 jv_dynamics_progspace_key,
101 /* FIXME: carlton/2003-02-04: This is the main or only caller of
102 allocate_objfile with first argument NULL; as a result, this code
103 breaks every so often. Somebody should write a test case that
104 exercises GDB in various ways (e.g. something involving loading a
105 dynamic library) after this code has been called. */
107 static struct objfile *
108 get_dynamics_objfile (struct gdbarch *gdbarch)
110 struct objfile *dynamics_objfile;
112 dynamics_objfile = program_space_data (current_program_space,
113 jv_dynamics_progspace_key);
115 if (dynamics_objfile == NULL)
117 struct jv_per_objfile_data *data;
119 /* Mark it as shared so that it is cleared when the inferior is
121 dynamics_objfile = allocate_objfile (NULL, OBJF_SHARED);
122 dynamics_objfile->gdbarch = gdbarch;
124 data = XCNEW (struct jv_per_objfile_data);
125 set_objfile_data (dynamics_objfile, jv_dynamics_objfile_data_key, data);
127 set_program_space_data (current_program_space,
128 jv_dynamics_progspace_key,
131 return dynamics_objfile;
134 static struct symtab *
135 get_java_class_symtab (struct gdbarch *gdbarch)
137 struct objfile *objfile = get_dynamics_objfile (gdbarch);
138 struct symtab *class_symtab = objfile->symtabs;
140 if (class_symtab == NULL)
142 struct blockvector *bv;
144 struct jv_per_objfile_data *jv_data;
146 class_symtab = allocate_symtab ("<java-classes>", objfile);
147 class_symtab->language = language_java;
148 bv = (struct blockvector *)
149 obstack_alloc (&objfile->objfile_obstack,
150 sizeof (struct blockvector) + sizeof (struct block *));
151 BLOCKVECTOR_NBLOCKS (bv) = 1;
152 BLOCKVECTOR (class_symtab) = bv;
154 /* Allocate dummy STATIC_BLOCK. */
155 bl = allocate_block (&objfile->objfile_obstack);
156 BLOCK_DICT (bl) = dict_create_linear (&objfile->objfile_obstack,
158 BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = bl;
160 /* Allocate GLOBAL_BLOCK. */
161 bl = allocate_global_block (&objfile->objfile_obstack);
162 BLOCK_DICT (bl) = dict_create_hashed_expandable ();
163 set_block_symtab (bl, class_symtab);
164 BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
166 /* Arrange to free the dict. */
167 jv_data = objfile_data (objfile, jv_dynamics_objfile_data_key);
168 jv_data->dict = BLOCK_DICT (bl);
174 add_class_symtab_symbol (struct symbol *sym)
176 struct symtab *symtab
177 = get_java_class_symtab (get_objfile_arch (SYMBOL_SYMTAB (sym)->objfile));
178 struct blockvector *bv = BLOCKVECTOR (symtab);
180 dict_add_symbol (BLOCK_DICT (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)), sym);
183 static struct symbol *
184 add_class_symbol (struct type *type, CORE_ADDR addr)
187 struct objfile *objfile = get_dynamics_objfile (get_type_arch (type));
189 sym = (struct symbol *)
190 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
191 memset (sym, 0, sizeof (struct symbol));
192 SYMBOL_SET_LANGUAGE (sym, language_java);
193 SYMBOL_SET_LINKAGE_NAME (sym, TYPE_TAG_NAME (type));
194 SYMBOL_CLASS (sym) = LOC_TYPEDEF;
195 /* SYMBOL_VALUE (sym) = valu; */
196 SYMBOL_TYPE (sym) = type;
197 SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
198 SYMBOL_VALUE_ADDRESS (sym) = addr;
203 java_lookup_class (char *name)
207 sym = lookup_symbol (name, expression_context_block, STRUCT_DOMAIN, NULL);
209 return SYMBOL_TYPE (sym);
210 /* FIXME - should search inferior's symbol table. */
214 /* Return a nul-terminated string (allocated on OBSTACK) for
215 a name given by NAME (which has type Utf8Const*). */
218 get_java_utf8_name (struct obstack *obstack, struct value *name)
221 struct value *temp = name;
225 temp = value_struct_elt (&temp, NULL, "length", NULL, "structure");
226 name_length = (int) value_as_long (temp);
227 data_addr = value_address (temp) + TYPE_LENGTH (value_type (temp));
228 chrs = obstack_alloc (obstack, name_length + 1);
229 chrs[name_length] = '\0';
230 read_memory (data_addr, (gdb_byte *) chrs, name_length);
235 java_class_from_object (struct value *obj_val)
237 /* This is all rather inefficient, since the offsets of vtable and
238 class are fixed. FIXME */
239 struct value *vtable_val;
241 if (TYPE_CODE (value_type (obj_val)) == TYPE_CODE_PTR
242 && TYPE_LENGTH (TYPE_TARGET_TYPE (value_type (obj_val))) == 0)
243 obj_val = value_at (get_java_object_type (),
244 value_as_address (obj_val));
246 vtable_val = value_struct_elt (&obj_val, NULL, "vtable", NULL, "structure");
247 return value_struct_elt (&vtable_val, NULL, "class", NULL, "structure");
250 /* Check if CLASS_IS_PRIMITIVE(value of clas): */
252 java_class_is_primitive (struct value *clas)
254 struct value *vtable = value_struct_elt (&clas, NULL, "vtable",
256 CORE_ADDR i = value_as_address (vtable);
258 return (int) (i & 0x7fffffff) == (int) 0x7fffffff;
261 /* Read a GCJ Class object, and generated a gdb (TYPE_CODE_STRUCT) type. */
264 type_from_class (struct gdbarch *gdbarch, struct value *clas)
269 struct objfile *objfile;
270 struct value *utf8_name;
275 type = check_typedef (value_type (clas));
276 if (TYPE_CODE (type) == TYPE_CODE_PTR)
278 if (value_logical_not (clas))
280 clas = value_ind (clas);
282 addr = value_address (clas);
284 objfile = get_dynamics_objfile (gdbarch);
285 if (java_class_is_primitive (clas))
290 sig = value_struct_elt (&temp, NULL, "method_count", NULL, "structure");
291 return java_primitive_type (gdbarch, value_as_long (sig));
294 /* Get Class name. */
295 /* If clasloader non-null, prepend loader address. FIXME */
297 utf8_name = value_struct_elt (&temp, NULL, "name", NULL, "structure");
298 name = get_java_utf8_name (&objfile->objfile_obstack, utf8_name);
299 for (nptr = name; *nptr != 0; nptr++)
305 type = java_lookup_class (name);
309 type = alloc_type (objfile);
310 TYPE_CODE (type) = TYPE_CODE_STRUCT;
311 INIT_CPLUS_SPECIFIC (type);
315 char *signature = name;
316 int namelen = java_demangled_signature_length (signature);
318 if (namelen > strlen (name))
319 name = obstack_alloc (&objfile->objfile_obstack, namelen + 1);
320 java_demangled_signature_copy (name, signature);
321 name[namelen] = '\0';
324 /* Set array element type. */
325 temp = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
326 deprecated_set_value_type (temp,
327 lookup_pointer_type (value_type (clas)));
328 TYPE_TARGET_TYPE (type) = type_from_class (gdbarch, temp);
331 ALLOCATE_CPLUS_STRUCT_TYPE (type);
332 TYPE_TAG_NAME (type) = name;
334 add_class_symtab_symbol (add_class_symbol (type, addr));
335 return java_link_class_type (gdbarch, type, clas);
338 /* Fill in class TYPE with data from the CLAS value. */
341 java_link_class_type (struct gdbarch *gdbarch,
342 struct type *type, struct value *clas)
345 const char *unqualified_name;
346 const char *name = TYPE_TAG_NAME (type);
347 int ninterfaces, nfields, nmethods;
348 int type_is_object = 0;
349 struct fn_field *fn_fields;
350 struct fn_fieldlist *fn_fieldlists;
351 struct value *fields;
352 struct value *methods;
353 struct value *method = NULL;
354 struct value *field = NULL;
356 struct objfile *objfile = get_dynamics_objfile (gdbarch);
359 gdb_assert (name != NULL);
360 unqualified_name = strrchr (name, '.');
361 if (unqualified_name == NULL)
362 unqualified_name = name;
365 temp = value_struct_elt (&temp, NULL, "superclass", NULL, "structure");
366 if (strcmp (name, "java.lang.Object") == 0)
368 tsuper = get_java_object_type ();
369 if (tsuper && TYPE_CODE (tsuper) == TYPE_CODE_PTR)
370 tsuper = TYPE_TARGET_TYPE (tsuper);
374 tsuper = type_from_class (gdbarch, temp);
380 ninterfaces = value_as_long (value_struct_elt (&temp, NULL, "interface_len",
383 TYPE_N_BASECLASSES (type) = (tsuper == NULL ? 0 : 1) + ninterfaces;
385 nfields = value_as_long (value_struct_elt (&temp, NULL, "field_count",
387 nfields += TYPE_N_BASECLASSES (type);
388 nfields++; /* Add one for dummy "class" field. */
389 TYPE_NFIELDS (type) = nfields;
390 TYPE_FIELDS (type) = (struct field *)
391 TYPE_ALLOC (type, sizeof (struct field) * nfields);
393 memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
395 TYPE_FIELD_PRIVATE_BITS (type) =
396 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
397 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
399 TYPE_FIELD_PROTECTED_BITS (type) =
400 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
401 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
403 TYPE_FIELD_IGNORE_BITS (type) =
404 (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
405 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
407 TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
408 TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
409 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
413 TYPE_BASECLASS (type, 0) = tsuper;
415 SET_TYPE_FIELD_PRIVATE (type, 0);
419 if (i > 2 && name[i - 1] == ']' && tsuper != NULL)
422 TYPE_LENGTH (type) = TYPE_LENGTH (tsuper) + 4; /* size with "length" */
427 temp = value_struct_elt (&temp, NULL, "size_in_bytes",
429 TYPE_LENGTH (type) = value_as_long (temp);
433 nfields--; /* First set up dummy "class" field. */
434 SET_FIELD_PHYSADDR (TYPE_FIELD (type, nfields), value_address (clas));
435 TYPE_FIELD_NAME (type, nfields) = "class";
436 TYPE_FIELD_TYPE (type, nfields) = value_type (clas);
437 SET_TYPE_FIELD_PRIVATE (type, nfields);
439 for (i = TYPE_N_BASECLASSES (type); i < nfields; i++)
447 fields = value_struct_elt (&temp, NULL, "fields", NULL, "structure");
448 field = value_ind (fields);
451 { /* Re-use field value for next field. */
453 = value_address (field) + TYPE_LENGTH (value_type (field));
455 set_value_address (field, addr);
456 set_value_lazy (field, 1);
459 temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
460 TYPE_FIELD_NAME (type, i) =
461 get_java_utf8_name (&objfile->objfile_obstack, temp);
463 accflags = value_as_long (value_struct_elt (&temp, NULL, "accflags",
466 temp = value_struct_elt (&temp, NULL, "info", NULL, "structure");
467 boffset = value_as_long (value_struct_elt (&temp, NULL, "boffset",
469 if (accflags & 0x0001) /* public access */
473 if (accflags & 0x0002) /* private access */
475 SET_TYPE_FIELD_PRIVATE (type, i);
477 if (accflags & 0x0004) /* protected access */
479 SET_TYPE_FIELD_PROTECTED (type, i);
481 if (accflags & 0x0008) /* ACC_STATIC */
482 SET_FIELD_PHYSADDR (TYPE_FIELD (type, i), boffset);
484 SET_FIELD_BITPOS (TYPE_FIELD (type, i), 8 * boffset);
485 if (accflags & 0x8000) /* FIELD_UNRESOLVED_FLAG */
487 TYPE_FIELD_TYPE (type, i) = get_java_object_type (); /* FIXME */
494 temp = value_struct_elt (&temp, NULL, "type", NULL, "structure");
495 ftype = type_from_class (gdbarch, temp);
496 if (TYPE_CODE (ftype) == TYPE_CODE_STRUCT)
497 ftype = lookup_pointer_type (ftype);
498 TYPE_FIELD_TYPE (type, i) = ftype;
503 nmethods = value_as_long (value_struct_elt (&temp, NULL, "method_count",
505 j = nmethods * sizeof (struct fn_field);
506 fn_fields = (struct fn_field *)
507 obstack_alloc (&objfile->objfile_obstack, j);
508 memset (fn_fields, 0, j);
509 fn_fieldlists = (struct fn_fieldlist *)
510 alloca (nmethods * sizeof (struct fn_fieldlist));
513 for (i = 0; i < nmethods; i++)
521 methods = value_struct_elt (&temp, NULL, "methods",
523 method = value_ind (methods);
526 { /* Re-use method value for next method. */
528 = value_address (method) + TYPE_LENGTH (value_type (method));
530 set_value_address (method, addr);
531 set_value_lazy (method, 1);
534 /* Get method name. */
536 temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
537 mname = get_java_utf8_name (&objfile->objfile_obstack, temp);
538 if (strcmp (mname, "<init>") == 0)
539 mname = unqualified_name;
541 /* Check for an existing method with the same name.
542 * This makes building the fn_fieldslists an O(nmethods**2)
543 * operation. That could be using hashing, but I doubt it
544 * is worth it. Note that we do maintain the order of methods
545 * in the inferior's Method table (as long as that is grouped
546 * by method name), which I think is desirable. --PB */
547 for (k = 0, j = TYPE_NFN_FIELDS (type);;)
550 { /* No match - new method name. */
551 j = TYPE_NFN_FIELDS (type)++;
552 fn_fieldlists[j].name = mname;
553 fn_fieldlists[j].length = 1;
554 fn_fieldlists[j].fn_fields = &fn_fields[i];
558 if (strcmp (mname, fn_fieldlists[j].name) == 0)
559 { /* Found an existing method with the same name. */
562 if (mname != unqualified_name)
563 obstack_free (&objfile->objfile_obstack, mname);
564 mname = fn_fieldlists[j].name;
565 fn_fieldlists[j].length++;
566 k = i - k; /* Index of new slot. */
567 /* Shift intervening fn_fields (between k and i) down. */
568 for (l = i; l > k; l--)
569 fn_fields[l] = fn_fields[l - 1];
570 for (l = TYPE_NFN_FIELDS (type); --l > j;)
571 fn_fieldlists[l].fn_fields++;
574 k += fn_fieldlists[j].length;
576 fn_fields[k].physname = "";
577 fn_fields[k].is_stub = 1;
579 fn_fields[k].type = lookup_function_type
580 (builtin_java_type (gdbarch)->builtin_void);
581 TYPE_CODE (fn_fields[k].type) = TYPE_CODE_METHOD;
584 j = TYPE_NFN_FIELDS (type) * sizeof (struct fn_fieldlist);
585 TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
586 obstack_alloc (&objfile->objfile_obstack, j);
587 memcpy (TYPE_FN_FIELDLISTS (type), fn_fieldlists, j);
593 get_java_object_type (void)
597 sym = lookup_symbol ("java.lang.Object", NULL, STRUCT_DOMAIN, NULL);
599 error (_("cannot find java.lang.Object"));
600 return SYMBOL_TYPE (sym);
604 get_java_object_header_size (struct gdbarch *gdbarch)
606 struct type *objtype = get_java_object_type ();
609 return (2 * gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT);
611 return TYPE_LENGTH (objtype);
615 is_object_type (struct type *type)
617 CHECK_TYPEDEF (type);
618 if (TYPE_CODE (type) == TYPE_CODE_PTR)
620 struct type *ttype = check_typedef (TYPE_TARGET_TYPE (type));
622 if (TYPE_CODE (ttype) != TYPE_CODE_STRUCT)
624 while (TYPE_N_BASECLASSES (ttype) > 0)
625 ttype = TYPE_BASECLASS (ttype, 0);
626 name = TYPE_TAG_NAME (ttype);
627 if (name != NULL && strcmp (name, "java.lang.Object") == 0)
630 = TYPE_NFIELDS (ttype) > 0 ? TYPE_FIELD_NAME (ttype, 0) : (char *) 0;
631 if (name != NULL && strcmp (name, "vtable") == 0)
638 java_primitive_type (struct gdbarch *gdbarch, int signature)
640 const struct builtin_java_type *builtin = builtin_java_type (gdbarch);
645 return builtin->builtin_byte;
647 return builtin->builtin_short;
649 return builtin->builtin_int;
651 return builtin->builtin_long;
653 return builtin->builtin_boolean;
655 return builtin->builtin_char;
657 return builtin->builtin_float;
659 return builtin->builtin_double;
661 return builtin->builtin_void;
663 error (_("unknown signature '%c' for primitive type"), (char) signature);
666 /* If name[0 .. namelen-1] is the name of a primitive Java type,
667 return that type. Otherwise, return NULL. */
670 java_primitive_type_from_name (struct gdbarch *gdbarch,
671 const char *name, int namelen)
673 const struct builtin_java_type *builtin = builtin_java_type (gdbarch);
678 if (namelen == 4 && memcmp (name, "byte", 4) == 0)
679 return builtin->builtin_byte;
680 if (namelen == 7 && memcmp (name, "boolean", 7) == 0)
681 return builtin->builtin_boolean;
684 if (namelen == 4 && memcmp (name, "char", 4) == 0)
685 return builtin->builtin_char;
688 if (namelen == 6 && memcmp (name, "double", 6) == 0)
689 return builtin->builtin_double;
692 if (namelen == 5 && memcmp (name, "float", 5) == 0)
693 return builtin->builtin_float;
696 if (namelen == 3 && memcmp (name, "int", 3) == 0)
697 return builtin->builtin_int;
700 if (namelen == 4 && memcmp (name, "long", 4) == 0)
701 return builtin->builtin_long;
704 if (namelen == 5 && memcmp (name, "short", 5) == 0)
705 return builtin->builtin_short;
708 if (namelen == 4 && memcmp (name, "void", 4) == 0)
709 return builtin->builtin_void;
716 java_primitive_type_name (int signature)
739 error (_("unknown signature '%c' for primitive type"), (char) signature);
742 /* Return the length (in bytes) of demangled name of the Java type
743 signature string SIGNATURE. */
746 java_demangled_signature_length (const char *signature)
750 for (; *signature == '['; signature++)
751 array += 2; /* Two chars for "[]". */
752 switch (signature[0])
755 /* Subtract 2 for 'L' and ';'. */
756 return strlen (signature) - 2 + array;
758 return strlen (java_primitive_type_name (signature[0])) + array;
762 /* Demangle the Java type signature SIGNATURE, leaving the result in
766 java_demangled_signature_copy (char *result, const char *signature)
772 while (*signature == '[')
777 switch (signature[0])
780 /* Subtract 2 for 'L' and ';', but add 1 for final nul. */
783 for (; *signature != ';' && *signature != '\0'; signature++)
785 if (*signature == '/')
792 ptr = java_primitive_type_name (signature[0]);
794 strcpy (result, ptr);
805 /* Return the demangled name of the Java type signature string SIGNATURE,
806 as a freshly allocated copy. */
809 java_demangle_type_signature (const char *signature)
811 int length = java_demangled_signature_length (signature);
812 char *result = xmalloc (length + 1);
814 java_demangled_signature_copy (result, signature);
815 result[length] = '\0';
819 /* Return the type of TYPE followed by DIMS pairs of [ ].
820 If DIMS == 0, TYPE is returned. */
823 java_array_type (struct type *type, int dims)
827 /* FIXME This is bogus! Java arrays are not gdb arrays! */
828 type = lookup_array_range_type (type, 0, 0);
834 /* Create a Java string in the inferior from a (Utf8) literal. */
836 static struct value *
837 java_value_string (char *ptr, int len)
839 error (_("not implemented - java_value_string")); /* FIXME */
842 /* Return the encoding that should be used for the character type
846 java_get_encoding (struct type *type)
848 struct gdbarch *arch = get_type_arch (type);
849 const char *encoding;
851 if (type == builtin_java_type (arch)->builtin_char)
853 if (gdbarch_byte_order (arch) == BFD_ENDIAN_BIG)
854 encoding = "UTF-16BE";
856 encoding = "UTF-16LE";
859 encoding = target_charset (arch);
864 /* Print the character C on STREAM as part of the contents of a literal
865 string whose delimiter is QUOTER. Note that that format for printing
866 characters and strings is language specific. */
869 java_emit_char (int c, struct type *type, struct ui_file *stream, int quoter)
871 const char *encoding = java_get_encoding (type);
873 generic_emit_char (c, type, stream, quoter, encoding);
876 /* Implementation of la_printchar method. */
879 java_printchar (int c, struct type *type, struct ui_file *stream)
881 fputs_filtered ("'", stream);
882 LA_EMIT_CHAR (c, type, stream, '\'');
883 fputs_filtered ("'", stream);
886 /* Implementation of la_printstr method. */
889 java_printstr (struct ui_file *stream, struct type *type,
890 const gdb_byte *string,
891 unsigned int length, const char *encoding, int force_ellipses,
892 const struct value_print_options *options)
894 const char *type_encoding = java_get_encoding (type);
896 if (!encoding || !*encoding)
897 encoding = type_encoding;
899 generic_printstr (stream, type, string, length, encoding,
900 force_ellipses, '"', 0, options);
903 static struct value *
904 evaluate_subexp_java (struct type *expect_type, struct expression *exp,
905 int *pos, enum noside noside)
910 enum exp_opcode op = exp->elts[*pos].opcode;
918 if (noside == EVAL_SKIP)
921 arg1 = evaluate_subexp_java (NULL_TYPE, exp, pos, EVAL_NORMAL);
922 if (is_object_type (value_type (arg1)))
926 type = type_from_class (exp->gdbarch, java_class_from_object (arg1));
927 arg1 = value_cast (lookup_pointer_type (type), arg1);
929 return value_ind (arg1);
931 case BINOP_SUBSCRIPT:
933 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
934 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
935 if (noside == EVAL_SKIP)
937 /* If the user attempts to subscript something that is not an
938 array or pointer type (like a plain int variable for example),
939 then report this as an error. */
941 arg1 = coerce_ref (arg1);
942 type = check_typedef (value_type (arg1));
943 if (TYPE_CODE (type) == TYPE_CODE_PTR)
944 type = check_typedef (TYPE_TARGET_TYPE (type));
945 name = TYPE_NAME (type);
947 name = TYPE_TAG_NAME (type);
948 i = name == NULL ? 0 : strlen (name);
949 if (TYPE_CODE (type) == TYPE_CODE_STRUCT
950 && i > 2 && name[i - 1] == ']')
952 enum bfd_endian byte_order = gdbarch_byte_order (exp->gdbarch);
955 struct type *el_type;
958 struct value *clas = java_class_from_object (arg1);
959 struct value *temp = clas;
960 /* Get CLASS_ELEMENT_TYPE of the array type. */
961 temp = value_struct_elt (&temp, NULL, "methods",
963 deprecated_set_value_type (temp, value_type (clas));
964 el_type = type_from_class (exp->gdbarch, temp);
965 if (TYPE_CODE (el_type) == TYPE_CODE_STRUCT)
966 el_type = lookup_pointer_type (el_type);
968 if (noside == EVAL_AVOID_SIDE_EFFECTS)
969 return value_zero (el_type, VALUE_LVAL (arg1));
970 address = value_as_address (arg1);
971 address += get_java_object_header_size (exp->gdbarch);
972 read_memory (address, buf4, 4);
973 length = (long) extract_signed_integer (buf4, 4, byte_order);
974 index = (long) value_as_long (arg2);
975 if (index >= length || index < 0)
976 error (_("array index (%ld) out of bounds (length: %ld)"),
978 address = (address + 4) + index * TYPE_LENGTH (el_type);
979 return value_at (el_type, address);
981 else if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
983 if (noside == EVAL_AVOID_SIDE_EFFECTS)
984 return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
986 return value_subscript (arg1, value_as_long (arg2));
989 error (_("cannot subscript something of type `%s'"), name);
991 error (_("cannot subscript requested type"));
995 i = longest_to_int (exp->elts[pc + 1].longconst);
996 (*pos) += 3 + BYTES_TO_EXP_ELEM (i + 1);
997 if (noside == EVAL_SKIP)
999 return java_value_string (&exp->elts[pc + 2].string, i);
1002 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
1003 /* Convert object field (such as TYPE.class) to reference. */
1004 if (TYPE_CODE (value_type (arg1)) == TYPE_CODE_STRUCT)
1005 arg1 = value_addr (arg1);
1011 return evaluate_subexp_standard (expect_type, exp, pos, noside);
1013 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
1016 static char *java_demangle (const char *mangled, int options)
1018 return cplus_demangle (mangled, options | DMGL_JAVA);
1021 /* Find the member function name of the demangled name NAME. NAME
1022 must be a method name including arguments, in order to correctly
1023 locate the last component.
1025 This function return a pointer to the first dot before the
1026 member function name, or NULL if the name was not of the
1030 java_find_last_component (const char *name)
1034 /* Find argument list. */
1035 p = strchr (name, '(');
1040 /* Back up and find first dot prior to argument list. */
1041 while (p > name && *p != '.')
1050 /* Return the name of the class containing method PHYSNAME. */
1053 java_class_name_from_physname (const char *physname)
1057 char *demangled_name = java_demangle (physname, DMGL_PARAMS | DMGL_ANSI);
1059 if (demangled_name == NULL)
1062 end = java_find_last_component (demangled_name);
1065 ret = xmalloc (end - demangled_name + 1);
1066 memcpy (ret, demangled_name, end - demangled_name);
1067 ret[end - demangled_name] = '\0';
1070 xfree (demangled_name);
1074 /* Table mapping opcodes into strings for printing operators
1075 and precedences of the operators. */
1077 const struct op_print java_op_print_tab[] =
1079 {",", BINOP_COMMA, PREC_COMMA, 0},
1080 {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
1081 {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
1082 {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
1083 {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
1084 {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
1085 {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
1086 {"==", BINOP_EQUAL, PREC_EQUAL, 0},
1087 {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
1088 {"<=", BINOP_LEQ, PREC_ORDER, 0},
1089 {">=", BINOP_GEQ, PREC_ORDER, 0},
1090 {">", BINOP_GTR, PREC_ORDER, 0},
1091 {"<", BINOP_LESS, PREC_ORDER, 0},
1092 {">>", BINOP_RSH, PREC_SHIFT, 0},
1093 {"<<", BINOP_LSH, PREC_SHIFT, 0},
1094 {"+", BINOP_ADD, PREC_ADD, 0},
1095 {"-", BINOP_SUB, PREC_ADD, 0},
1096 {"*", BINOP_MUL, PREC_MUL, 0},
1097 {"/", BINOP_DIV, PREC_MUL, 0},
1098 {"%", BINOP_REM, PREC_MUL, 0},
1099 {"-", UNOP_NEG, PREC_PREFIX, 0},
1100 {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
1101 {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
1102 {"*", UNOP_IND, PREC_PREFIX, 0},
1103 {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
1104 {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
1108 enum java_primitive_types
1110 java_primitive_type_int,
1111 java_primitive_type_short,
1112 java_primitive_type_long,
1113 java_primitive_type_byte,
1114 java_primitive_type_boolean,
1115 java_primitive_type_char,
1116 java_primitive_type_float,
1117 java_primitive_type_double,
1118 java_primitive_type_void,
1119 nr_java_primitive_types
1123 java_language_arch_info (struct gdbarch *gdbarch,
1124 struct language_arch_info *lai)
1126 const struct builtin_java_type *builtin = builtin_java_type (gdbarch);
1128 lai->string_char_type = builtin->builtin_char;
1129 lai->primitive_type_vector
1130 = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_java_primitive_types + 1,
1132 lai->primitive_type_vector [java_primitive_type_int]
1133 = builtin->builtin_int;
1134 lai->primitive_type_vector [java_primitive_type_short]
1135 = builtin->builtin_short;
1136 lai->primitive_type_vector [java_primitive_type_long]
1137 = builtin->builtin_long;
1138 lai->primitive_type_vector [java_primitive_type_byte]
1139 = builtin->builtin_byte;
1140 lai->primitive_type_vector [java_primitive_type_boolean]
1141 = builtin->builtin_boolean;
1142 lai->primitive_type_vector [java_primitive_type_char]
1143 = builtin->builtin_char;
1144 lai->primitive_type_vector [java_primitive_type_float]
1145 = builtin->builtin_float;
1146 lai->primitive_type_vector [java_primitive_type_double]
1147 = builtin->builtin_double;
1148 lai->primitive_type_vector [java_primitive_type_void]
1149 = builtin->builtin_void;
1151 lai->bool_type_symbol = "boolean";
1152 lai->bool_type_default = builtin->builtin_boolean;
1155 const struct exp_descriptor exp_descriptor_java =
1157 print_subexp_standard,
1158 operator_length_standard,
1159 operator_check_standard,
1161 dump_subexp_body_standard,
1162 evaluate_subexp_java
1165 const struct language_defn java_language_defn =
1167 "java", /* Language name */
1174 &exp_descriptor_java,
1178 java_printchar, /* Print a character constant */
1179 java_printstr, /* Function to print string constant */
1180 java_emit_char, /* Function to print a single character */
1181 java_print_type, /* Print a type using appropriate syntax */
1182 default_print_typedef, /* Print a typedef using appropriate syntax */
1183 java_val_print, /* Print a value using appropriate syntax */
1184 java_value_print, /* Print a top-level value */
1185 default_read_var_value, /* la_read_var_value */
1186 NULL, /* Language specific skip_trampoline */
1187 "this", /* name_of_this */
1188 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1189 basic_lookup_transparent_type,/* lookup_transparent_type */
1190 java_demangle, /* Language specific symbol demangler */
1191 java_class_name_from_physname,/* Language specific class name */
1192 java_op_print_tab, /* expression operators for printing */
1193 0, /* not c-style arrays */
1194 0, /* String lower bound */
1195 default_word_break_characters,
1196 default_make_symbol_completion_list,
1197 java_language_arch_info,
1198 default_print_array_index,
1199 default_pass_by_reference,
1201 NULL, /* la_get_symbol_name_cmp */
1202 iterate_over_symbols,
1207 build_java_types (struct gdbarch *gdbarch)
1209 struct builtin_java_type *builtin_java_type
1210 = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_java_type);
1212 builtin_java_type->builtin_int
1213 = arch_integer_type (gdbarch, 32, 0, "int");
1214 builtin_java_type->builtin_short
1215 = arch_integer_type (gdbarch, 16, 0, "short");
1216 builtin_java_type->builtin_long
1217 = arch_integer_type (gdbarch, 64, 0, "long");
1218 builtin_java_type->builtin_byte
1219 = arch_integer_type (gdbarch, 8, 0, "byte");
1220 builtin_java_type->builtin_boolean
1221 = arch_boolean_type (gdbarch, 8, 0, "boolean");
1222 builtin_java_type->builtin_char
1223 = arch_character_type (gdbarch, 16, 1, "char");
1224 builtin_java_type->builtin_float
1225 = arch_float_type (gdbarch, 32, "float", NULL);
1226 builtin_java_type->builtin_double
1227 = arch_float_type (gdbarch, 64, "double", NULL);
1228 builtin_java_type->builtin_void
1229 = arch_type (gdbarch, TYPE_CODE_VOID, 1, "void");
1231 return builtin_java_type;
1234 static struct gdbarch_data *java_type_data;
1236 const struct builtin_java_type *
1237 builtin_java_type (struct gdbarch *gdbarch)
1239 return gdbarch_data (gdbarch, java_type_data);
1243 _initialize_java_language (void)
1245 jv_dynamics_objfile_data_key
1246 = register_objfile_data_with_cleanup (NULL, jv_per_objfile_free);
1247 jv_dynamics_progspace_key = register_program_space_data ();
1249 java_type_data = gdbarch_data_register_post_init (build_java_types);
1251 add_language (&java_language_defn);