1101 lines
31 KiB
C
1101 lines
31 KiB
C
/* Java language support routines for GDB, the GNU debugger.
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Copyright 1997, 1998, 1999, 2000, 2003, 2004 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "parser-defs.h"
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#include "language.h"
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#include "gdbtypes.h"
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#include "symtab.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "gdb_string.h"
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#include "value.h"
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#include "c-lang.h"
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#include "jv-lang.h"
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#include "gdbcore.h"
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#include "block.h"
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#include "demangle.h"
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#include "dictionary.h"
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#include <ctype.h>
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struct type *java_int_type;
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struct type *java_byte_type;
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struct type *java_short_type;
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struct type *java_long_type;
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struct type *java_boolean_type;
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struct type *java_char_type;
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struct type *java_float_type;
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struct type *java_double_type;
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struct type *java_void_type;
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/* Local functions */
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extern void _initialize_java_language (void);
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static int java_demangled_signature_length (char *);
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static void java_demangled_signature_copy (char *, char *);
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static struct symtab *get_java_class_symtab (void);
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static char *get_java_utf8_name (struct obstack *obstack, struct value *name);
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static int java_class_is_primitive (struct value *clas);
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static struct value *java_value_string (char *ptr, int len);
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static void java_emit_char (int c, struct ui_file * stream, int quoter);
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/* This objfile contains symtabs that have been dynamically created
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to record dynamically loaded Java classes and dynamically
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compiled java methods. */
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static struct objfile *dynamics_objfile = NULL;
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static struct type *java_link_class_type (struct type *, struct value *);
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/* FIXME: carlton/2003-02-04: This is the main or only caller of
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allocate_objfile with first argument NULL; as a result, this code
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breaks every so often. Somebody should write a test case that
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exercises GDB in various ways (e.g. something involving loading a
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dynamic library) after this code has been called. */
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static struct objfile *
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get_dynamics_objfile (void)
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{
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if (dynamics_objfile == NULL)
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{
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dynamics_objfile = allocate_objfile (NULL, 0);
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}
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return dynamics_objfile;
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}
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#if 1
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/* symtab contains classes read from the inferior. */
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static struct symtab *class_symtab = NULL;
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static void free_class_block (struct symtab *symtab);
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static struct symtab *
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get_java_class_symtab (void)
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{
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if (class_symtab == NULL)
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{
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struct objfile *objfile = get_dynamics_objfile ();
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struct blockvector *bv;
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struct block *bl;
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class_symtab = allocate_symtab ("<java-classes>", objfile);
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class_symtab->language = language_java;
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bv = (struct blockvector *)
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obstack_alloc (&objfile->symbol_obstack,
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sizeof (struct blockvector) + sizeof (struct block *));
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BLOCKVECTOR_NBLOCKS (bv) = 1;
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BLOCKVECTOR (class_symtab) = bv;
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/* Allocate dummy STATIC_BLOCK. */
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bl = allocate_block (&objfile->symbol_obstack);
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BLOCK_DICT (bl) = dict_create_linear (&objfile->symbol_obstack,
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NULL);
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BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = bl;
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/* Allocate GLOBAL_BLOCK. */
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bl = allocate_block (&objfile->symbol_obstack);
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BLOCK_DICT (bl) = dict_create_hashed_expandable ();
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BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
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class_symtab->free_func = free_class_block;
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}
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return class_symtab;
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}
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static void
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add_class_symtab_symbol (struct symbol *sym)
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{
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struct symtab *symtab = get_java_class_symtab ();
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struct blockvector *bv = BLOCKVECTOR (symtab);
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dict_add_symbol (BLOCK_DICT (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK)), sym);
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}
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static struct symbol *add_class_symbol (struct type *type, CORE_ADDR addr);
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static struct symbol *
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add_class_symbol (struct type *type, CORE_ADDR addr)
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{
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struct symbol *sym;
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sym = (struct symbol *)
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obstack_alloc (&dynamics_objfile->symbol_obstack, sizeof (struct symbol));
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memset (sym, 0, sizeof (struct symbol));
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SYMBOL_LANGUAGE (sym) = language_java;
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DEPRECATED_SYMBOL_NAME (sym) = TYPE_TAG_NAME (type);
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SYMBOL_CLASS (sym) = LOC_TYPEDEF;
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/* SYMBOL_VALUE (sym) = valu; */
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SYMBOL_TYPE (sym) = type;
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SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
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SYMBOL_VALUE_ADDRESS (sym) = addr;
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return sym;
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}
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/* Free the dynamic symbols block. */
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static void
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free_class_block (struct symtab *symtab)
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{
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struct blockvector *bv = BLOCKVECTOR (symtab);
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struct block *bl = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
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dict_free (BLOCK_DICT (bl));
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}
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#endif
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struct type *
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java_lookup_class (char *name)
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{
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struct symbol *sym;
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sym = lookup_symbol (name, expression_context_block, STRUCT_DOMAIN,
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(int *) 0, (struct symtab **) NULL);
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if (sym != NULL)
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return SYMBOL_TYPE (sym);
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#if 0
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CORE_ADDR addr;
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if (called from parser)
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{
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call lookup_class (or similar) in inferior;
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if not
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found:
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return NULL;
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addr = found in inferior;
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}
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else
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addr = 0;
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struct type *type;
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type = alloc_type (objfile);
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TYPE_CODE (type) = TYPE_CODE_STRUCT;
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INIT_CPLUS_SPECIFIC (type);
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TYPE_TAG_NAME (type) = obsavestring (name, strlen (name), &objfile->type_obstack);
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TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
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TYPE ? = addr;
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return type;
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#else
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/* FIXME - should search inferior's symbol table. */
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return NULL;
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#endif
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}
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/* Return a nul-terminated string (allocated on OBSTACK) for
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a name given by NAME (which has type Utf8Const*). */
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char *
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get_java_utf8_name (struct obstack *obstack, struct value *name)
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{
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char *chrs;
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struct value *temp = name;
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int name_length;
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CORE_ADDR data_addr;
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temp = value_struct_elt (&temp, NULL, "length", NULL, "structure");
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name_length = (int) value_as_long (temp);
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data_addr = VALUE_ADDRESS (temp) + VALUE_OFFSET (temp)
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+ TYPE_LENGTH (VALUE_TYPE (temp));
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chrs = obstack_alloc (obstack, name_length + 1);
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chrs[name_length] = '\0';
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read_memory (data_addr, chrs, name_length);
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return chrs;
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}
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struct value *
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java_class_from_object (struct value *obj_val)
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{
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/* This is all rather inefficient, since the offsets of vtable and
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class are fixed. FIXME */
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struct value *vtable_val;
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if (TYPE_CODE (VALUE_TYPE (obj_val)) == TYPE_CODE_PTR
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&& TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (obj_val))) == 0)
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obj_val = value_at (get_java_object_type (),
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value_as_address (obj_val), NULL);
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vtable_val = value_struct_elt (&obj_val, NULL, "vtable", NULL, "structure");
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return value_struct_elt (&vtable_val, NULL, "class", NULL, "structure");
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}
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/* Check if CLASS_IS_PRIMITIVE(value of clas): */
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static int
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java_class_is_primitive (struct value *clas)
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{
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struct value *vtable = value_struct_elt (&clas, NULL, "vtable", NULL, "struct");
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CORE_ADDR i = value_as_address (vtable);
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return (int) (i & 0x7fffffff) == (int) 0x7fffffff;
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}
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/* Read a GCJ Class object, and generated a gdb (TYPE_CODE_STRUCT) type. */
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struct type *
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type_from_class (struct value *clas)
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{
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struct type *type;
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char *name;
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struct value *temp;
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struct objfile *objfile;
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struct value *utf8_name;
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char *nptr;
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CORE_ADDR addr;
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struct block *bl;
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struct dict_iterator iter;
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int is_array = 0;
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type = check_typedef (VALUE_TYPE (clas));
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if (TYPE_CODE (type) == TYPE_CODE_PTR)
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{
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if (value_logical_not (clas))
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return NULL;
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clas = value_ind (clas);
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}
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addr = VALUE_ADDRESS (clas) + VALUE_OFFSET (clas);
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#if 0
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get_java_class_symtab ();
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bl = BLOCKVECTOR_BLOCK (BLOCKVECTOR (class_symtab), GLOBAL_BLOCK);
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ALL_BLOCK_SYMBOLS (block, iter, sym)
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{
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if (SYMBOL_VALUE_ADDRESS (sym) == addr)
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return SYMBOL_TYPE (sym);
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}
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#endif
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objfile = get_dynamics_objfile ();
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if (java_class_is_primitive (clas))
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{
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struct value *sig;
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temp = clas;
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sig = value_struct_elt (&temp, NULL, "method_count", NULL, "structure");
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return java_primitive_type (value_as_long (sig));
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}
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/* Get Class name. */
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/* if clasloader non-null, prepend loader address. FIXME */
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temp = clas;
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utf8_name = value_struct_elt (&temp, NULL, "name", NULL, "structure");
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name = get_java_utf8_name (&objfile->type_obstack, utf8_name);
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for (nptr = name; *nptr != 0; nptr++)
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{
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if (*nptr == '/')
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*nptr = '.';
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}
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type = java_lookup_class (name);
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if (type != NULL)
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return type;
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type = alloc_type (objfile);
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TYPE_CODE (type) = TYPE_CODE_STRUCT;
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INIT_CPLUS_SPECIFIC (type);
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if (name[0] == '[')
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{
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char *signature = name;
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int namelen = java_demangled_signature_length (signature);
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if (namelen > strlen (name))
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name = obstack_alloc (&objfile->type_obstack, namelen + 1);
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java_demangled_signature_copy (name, signature);
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name[namelen] = '\0';
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is_array = 1;
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temp = clas;
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/* Set array element type. */
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temp = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
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VALUE_TYPE (temp) = lookup_pointer_type (VALUE_TYPE (clas));
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TYPE_TARGET_TYPE (type) = type_from_class (temp);
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}
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ALLOCATE_CPLUS_STRUCT_TYPE (type);
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TYPE_TAG_NAME (type) = name;
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add_class_symtab_symbol (add_class_symbol (type, addr));
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return java_link_class_type (type, clas);
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}
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/* Fill in class TYPE with data from the CLAS value. */
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struct type *
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java_link_class_type (struct type *type, struct value *clas)
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{
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struct value *temp;
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char *unqualified_name;
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char *name = TYPE_TAG_NAME (type);
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int ninterfaces, nfields, nmethods;
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int type_is_object = 0;
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struct fn_field *fn_fields;
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struct fn_fieldlist *fn_fieldlists;
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struct value *fields;
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struct value *methods;
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struct value *method = NULL;
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struct value *field = NULL;
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int i, j;
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struct objfile *objfile = get_dynamics_objfile ();
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struct type *tsuper;
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unqualified_name = strrchr (name, '.');
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if (unqualified_name == NULL)
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unqualified_name = name;
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temp = clas;
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temp = value_struct_elt (&temp, NULL, "superclass", NULL, "structure");
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if (name != NULL && strcmp (name, "java.lang.Object") == 0)
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{
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tsuper = get_java_object_type ();
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if (tsuper && TYPE_CODE (tsuper) == TYPE_CODE_PTR)
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tsuper = TYPE_TARGET_TYPE (tsuper);
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type_is_object = 1;
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}
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else
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tsuper = type_from_class (temp);
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#if 1
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ninterfaces = 0;
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#else
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temp = clas;
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ninterfaces = value_as_long (value_struct_elt (&temp, NULL, "interface_len", NULL, "structure"));
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#endif
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TYPE_N_BASECLASSES (type) = (tsuper == NULL ? 0 : 1) + ninterfaces;
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temp = clas;
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nfields = value_as_long (value_struct_elt (&temp, NULL, "field_count", NULL, "structure"));
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nfields += TYPE_N_BASECLASSES (type);
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nfields++; /* Add one for dummy "class" field. */
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TYPE_NFIELDS (type) = nfields;
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TYPE_FIELDS (type) = (struct field *)
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TYPE_ALLOC (type, sizeof (struct field) * nfields);
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memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
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TYPE_FIELD_PRIVATE_BITS (type) =
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(B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
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B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
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TYPE_FIELD_PROTECTED_BITS (type) =
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(B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
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B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
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TYPE_FIELD_IGNORE_BITS (type) =
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(B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
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B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
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TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
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TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
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B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
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if (tsuper != NULL)
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{
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TYPE_BASECLASS (type, 0) = tsuper;
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if (type_is_object)
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SET_TYPE_FIELD_PRIVATE (type, 0);
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}
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i = strlen (name);
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if (i > 2 && name[i - 1] == ']' && tsuper != NULL)
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{
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/* FIXME */
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TYPE_LENGTH (type) = TYPE_LENGTH (tsuper) + 4; /* size with "length" */
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}
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else
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{
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temp = clas;
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temp = value_struct_elt (&temp, NULL, "size_in_bytes", NULL, "structure");
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TYPE_LENGTH (type) = value_as_long (temp);
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}
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fields = NULL;
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nfields--; /* First set up dummy "class" field. */
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SET_FIELD_PHYSADDR (TYPE_FIELD (type, nfields),
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VALUE_ADDRESS (clas) + VALUE_OFFSET (clas));
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TYPE_FIELD_NAME (type, nfields) = "class";
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TYPE_FIELD_TYPE (type, nfields) = VALUE_TYPE (clas);
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SET_TYPE_FIELD_PRIVATE (type, nfields);
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for (i = TYPE_N_BASECLASSES (type); i < nfields; i++)
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{
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int accflags;
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int boffset;
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if (fields == NULL)
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{
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temp = clas;
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fields = value_struct_elt (&temp, NULL, "fields", NULL, "structure");
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field = value_ind (fields);
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}
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else
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{ /* Re-use field value for next field. */
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VALUE_ADDRESS (field) += TYPE_LENGTH (VALUE_TYPE (field));
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VALUE_LAZY (field) = 1;
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}
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temp = field;
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temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
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TYPE_FIELD_NAME (type, i) =
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get_java_utf8_name (&objfile->type_obstack, temp);
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temp = field;
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accflags = value_as_long (value_struct_elt (&temp, NULL, "accflags",
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NULL, "structure"));
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temp = field;
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temp = value_struct_elt (&temp, NULL, "info", NULL, "structure");
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boffset = value_as_long (value_struct_elt (&temp, NULL, "boffset",
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NULL, "structure"));
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if (accflags & 0x0001) /* public access */
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{
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/* ??? */
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}
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if (accflags & 0x0002) /* private access */
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{
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SET_TYPE_FIELD_PRIVATE (type, i);
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}
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if (accflags & 0x0004) /* protected access */
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{
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SET_TYPE_FIELD_PROTECTED (type, i);
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}
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if (accflags & 0x0008) /* ACC_STATIC */
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SET_FIELD_PHYSADDR (TYPE_FIELD (type, i), boffset);
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else
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TYPE_FIELD_BITPOS (type, i) = 8 * boffset;
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if (accflags & 0x8000) /* FIELD_UNRESOLVED_FLAG */
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{
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TYPE_FIELD_TYPE (type, i) = get_java_object_type (); /* FIXME */
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}
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else
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{
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struct type *ftype;
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temp = field;
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temp = value_struct_elt (&temp, NULL, "type", NULL, "structure");
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ftype = type_from_class (temp);
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if (TYPE_CODE (ftype) == TYPE_CODE_STRUCT)
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ftype = lookup_pointer_type (ftype);
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TYPE_FIELD_TYPE (type, i) = ftype;
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}
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}
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temp = clas;
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nmethods = value_as_long (value_struct_elt (&temp, NULL, "method_count",
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NULL, "structure"));
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TYPE_NFN_FIELDS_TOTAL (type) = nmethods;
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j = nmethods * sizeof (struct fn_field);
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fn_fields = (struct fn_field *)
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obstack_alloc (&dynamics_objfile->symbol_obstack, j);
|
|
memset (fn_fields, 0, j);
|
|
fn_fieldlists = (struct fn_fieldlist *)
|
|
alloca (nmethods * sizeof (struct fn_fieldlist));
|
|
|
|
methods = NULL;
|
|
for (i = 0; i < nmethods; i++)
|
|
{
|
|
char *mname;
|
|
int k;
|
|
if (methods == NULL)
|
|
{
|
|
temp = clas;
|
|
methods = value_struct_elt (&temp, NULL, "methods", NULL, "structure");
|
|
method = value_ind (methods);
|
|
}
|
|
else
|
|
{ /* Re-use method value for next method. */
|
|
VALUE_ADDRESS (method) += TYPE_LENGTH (VALUE_TYPE (method));
|
|
VALUE_LAZY (method) = 1;
|
|
}
|
|
|
|
/* Get method name. */
|
|
temp = method;
|
|
temp = value_struct_elt (&temp, NULL, "name", NULL, "structure");
|
|
mname = get_java_utf8_name (&objfile->type_obstack, temp);
|
|
if (strcmp (mname, "<init>") == 0)
|
|
mname = unqualified_name;
|
|
|
|
/* Check for an existing method with the same name.
|
|
* This makes building the fn_fieldslists an O(nmethods**2)
|
|
* operation. That could be using hashing, but I doubt it
|
|
* is worth it. Note that we do maintain the order of methods
|
|
* in the inferior's Method table (as long as that is grouped
|
|
* by method name), which I think is desirable. --PB */
|
|
for (k = 0, j = TYPE_NFN_FIELDS (type);;)
|
|
{
|
|
if (--j < 0)
|
|
{ /* No match - new method name. */
|
|
j = TYPE_NFN_FIELDS (type)++;
|
|
fn_fieldlists[j].name = mname;
|
|
fn_fieldlists[j].length = 1;
|
|
fn_fieldlists[j].fn_fields = &fn_fields[i];
|
|
k = i;
|
|
break;
|
|
}
|
|
if (strcmp (mname, fn_fieldlists[j].name) == 0)
|
|
{ /* Found an existing method with the same name. */
|
|
int l;
|
|
if (mname != unqualified_name)
|
|
obstack_free (&objfile->type_obstack, mname);
|
|
mname = fn_fieldlists[j].name;
|
|
fn_fieldlists[j].length++;
|
|
k = i - k; /* Index of new slot. */
|
|
/* Shift intervening fn_fields (between k and i) down. */
|
|
for (l = i; l > k; l--)
|
|
fn_fields[l] = fn_fields[l - 1];
|
|
for (l = TYPE_NFN_FIELDS (type); --l > j;)
|
|
fn_fieldlists[l].fn_fields++;
|
|
break;
|
|
}
|
|
k += fn_fieldlists[j].length;
|
|
}
|
|
fn_fields[k].physname = "";
|
|
fn_fields[k].is_stub = 1;
|
|
fn_fields[k].type = make_function_type (java_void_type, NULL); /* FIXME */
|
|
TYPE_CODE (fn_fields[k].type) = TYPE_CODE_METHOD;
|
|
}
|
|
|
|
j = TYPE_NFN_FIELDS (type) * sizeof (struct fn_fieldlist);
|
|
TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
|
|
obstack_alloc (&dynamics_objfile->symbol_obstack, j);
|
|
memcpy (TYPE_FN_FIELDLISTS (type), fn_fieldlists, j);
|
|
|
|
return type;
|
|
}
|
|
|
|
static struct type *java_object_type;
|
|
|
|
struct type *
|
|
get_java_object_type (void)
|
|
{
|
|
if (java_object_type == NULL)
|
|
{
|
|
struct symbol *sym;
|
|
sym = lookup_symbol ("java.lang.Object", NULL, STRUCT_DOMAIN,
|
|
(int *) 0, (struct symtab **) NULL);
|
|
if (sym == NULL)
|
|
error ("cannot find java.lang.Object");
|
|
java_object_type = SYMBOL_TYPE (sym);
|
|
}
|
|
return java_object_type;
|
|
}
|
|
|
|
int
|
|
get_java_object_header_size (void)
|
|
{
|
|
struct type *objtype = get_java_object_type ();
|
|
if (objtype == NULL)
|
|
return (2 * TARGET_PTR_BIT / TARGET_CHAR_BIT);
|
|
else
|
|
return TYPE_LENGTH (objtype);
|
|
}
|
|
|
|
int
|
|
is_object_type (struct type *type)
|
|
{
|
|
CHECK_TYPEDEF (type);
|
|
if (TYPE_CODE (type) == TYPE_CODE_PTR)
|
|
{
|
|
struct type *ttype = check_typedef (TYPE_TARGET_TYPE (type));
|
|
char *name;
|
|
if (TYPE_CODE (ttype) != TYPE_CODE_STRUCT)
|
|
return 0;
|
|
while (TYPE_N_BASECLASSES (ttype) > 0)
|
|
ttype = TYPE_BASECLASS (ttype, 0);
|
|
name = TYPE_TAG_NAME (ttype);
|
|
if (name != NULL && strcmp (name, "java.lang.Object") == 0)
|
|
return 1;
|
|
name = TYPE_NFIELDS (ttype) > 0 ? TYPE_FIELD_NAME (ttype, 0) : (char *) 0;
|
|
if (name != NULL && strcmp (name, "vtable") == 0)
|
|
{
|
|
if (java_object_type == NULL)
|
|
java_object_type = type;
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct type *
|
|
java_primitive_type (int signature)
|
|
{
|
|
switch (signature)
|
|
{
|
|
case 'B':
|
|
return java_byte_type;
|
|
case 'S':
|
|
return java_short_type;
|
|
case 'I':
|
|
return java_int_type;
|
|
case 'J':
|
|
return java_long_type;
|
|
case 'Z':
|
|
return java_boolean_type;
|
|
case 'C':
|
|
return java_char_type;
|
|
case 'F':
|
|
return java_float_type;
|
|
case 'D':
|
|
return java_double_type;
|
|
case 'V':
|
|
return java_void_type;
|
|
}
|
|
error ("unknown signature '%c' for primitive type", (char) signature);
|
|
}
|
|
|
|
/* If name[0 .. namelen-1] is the name of a primitive Java type,
|
|
return that type. Otherwise, return NULL. */
|
|
|
|
struct type *
|
|
java_primitive_type_from_name (char *name, int namelen)
|
|
{
|
|
switch (name[0])
|
|
{
|
|
case 'b':
|
|
if (namelen == 4 && memcmp (name, "byte", 4) == 0)
|
|
return java_byte_type;
|
|
if (namelen == 7 && memcmp (name, "boolean", 7) == 0)
|
|
return java_boolean_type;
|
|
break;
|
|
case 'c':
|
|
if (namelen == 4 && memcmp (name, "char", 4) == 0)
|
|
return java_char_type;
|
|
case 'd':
|
|
if (namelen == 6 && memcmp (name, "double", 6) == 0)
|
|
return java_double_type;
|
|
break;
|
|
case 'f':
|
|
if (namelen == 5 && memcmp (name, "float", 5) == 0)
|
|
return java_float_type;
|
|
break;
|
|
case 'i':
|
|
if (namelen == 3 && memcmp (name, "int", 3) == 0)
|
|
return java_int_type;
|
|
break;
|
|
case 'l':
|
|
if (namelen == 4 && memcmp (name, "long", 4) == 0)
|
|
return java_long_type;
|
|
break;
|
|
case 's':
|
|
if (namelen == 5 && memcmp (name, "short", 5) == 0)
|
|
return java_short_type;
|
|
break;
|
|
case 'v':
|
|
if (namelen == 4 && memcmp (name, "void", 4) == 0)
|
|
return java_void_type;
|
|
break;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Return the length (in bytes) of demangled name of the Java type
|
|
signature string SIGNATURE. */
|
|
|
|
static int
|
|
java_demangled_signature_length (char *signature)
|
|
{
|
|
int array = 0;
|
|
for (; *signature == '['; signature++)
|
|
array += 2; /* Two chars for "[]". */
|
|
switch (signature[0])
|
|
{
|
|
case 'L':
|
|
/* Subtract 2 for 'L' and ';'. */
|
|
return strlen (signature) - 2 + array;
|
|
default:
|
|
return strlen (TYPE_NAME (java_primitive_type (signature[0]))) + array;
|
|
}
|
|
}
|
|
|
|
/* Demangle the Java type signature SIGNATURE, leaving the result in RESULT. */
|
|
|
|
static void
|
|
java_demangled_signature_copy (char *result, char *signature)
|
|
{
|
|
int array = 0;
|
|
char *ptr;
|
|
int i;
|
|
while (*signature == '[')
|
|
{
|
|
array++;
|
|
signature++;
|
|
}
|
|
switch (signature[0])
|
|
{
|
|
case 'L':
|
|
/* Subtract 2 for 'L' and ';', but add 1 for final nul. */
|
|
signature++;
|
|
ptr = result;
|
|
for (; *signature != ';' && *signature != '\0'; signature++)
|
|
{
|
|
if (*signature == '/')
|
|
*ptr++ = '.';
|
|
else
|
|
*ptr++ = *signature;
|
|
}
|
|
break;
|
|
default:
|
|
ptr = TYPE_NAME (java_primitive_type (signature[0]));
|
|
i = strlen (ptr);
|
|
strcpy (result, ptr);
|
|
ptr = result + i;
|
|
break;
|
|
}
|
|
while (--array >= 0)
|
|
{
|
|
*ptr++ = '[';
|
|
*ptr++ = ']';
|
|
}
|
|
}
|
|
|
|
/* Return the demangled name of the Java type signature string SIGNATURE,
|
|
as a freshly allocated copy. */
|
|
|
|
char *
|
|
java_demangle_type_signature (char *signature)
|
|
{
|
|
int length = java_demangled_signature_length (signature);
|
|
char *result = xmalloc (length + 1);
|
|
java_demangled_signature_copy (result, signature);
|
|
result[length] = '\0';
|
|
return result;
|
|
}
|
|
|
|
/* Return the type of TYPE followed by DIMS pairs of [ ].
|
|
If DIMS == 0, TYPE is returned. */
|
|
|
|
struct type *
|
|
java_array_type (struct type *type, int dims)
|
|
{
|
|
struct type *range_type;
|
|
|
|
while (dims-- > 0)
|
|
{
|
|
range_type = create_range_type (NULL, builtin_type_int, 0, 0);
|
|
/* FIXME This is bogus! Java arrays are not gdb arrays! */
|
|
type = create_array_type (NULL, type, range_type);
|
|
}
|
|
|
|
return type;
|
|
}
|
|
|
|
/* Create a Java string in the inferior from a (Utf8) literal. */
|
|
|
|
static struct value *
|
|
java_value_string (char *ptr, int len)
|
|
{
|
|
error ("not implemented - java_value_string"); /* FIXME */
|
|
}
|
|
|
|
/* Print the character C on STREAM as part of the contents of a literal
|
|
string whose delimiter is QUOTER. Note that that format for printing
|
|
characters and strings is language specific. */
|
|
|
|
static void
|
|
java_emit_char (int c, struct ui_file *stream, int quoter)
|
|
{
|
|
switch (c)
|
|
{
|
|
case '\\':
|
|
case '\'':
|
|
fprintf_filtered (stream, "\\%c", c);
|
|
break;
|
|
case '\b':
|
|
fputs_filtered ("\\b", stream);
|
|
break;
|
|
case '\t':
|
|
fputs_filtered ("\\t", stream);
|
|
break;
|
|
case '\n':
|
|
fputs_filtered ("\\n", stream);
|
|
break;
|
|
case '\f':
|
|
fputs_filtered ("\\f", stream);
|
|
break;
|
|
case '\r':
|
|
fputs_filtered ("\\r", stream);
|
|
break;
|
|
default:
|
|
if (isprint (c))
|
|
fputc_filtered (c, stream);
|
|
else
|
|
fprintf_filtered (stream, "\\u%.4x", (unsigned int) c);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static struct value *
|
|
evaluate_subexp_java (struct type *expect_type, struct expression *exp,
|
|
int *pos, enum noside noside)
|
|
{
|
|
int pc = *pos;
|
|
int i;
|
|
char *name;
|
|
enum exp_opcode op = exp->elts[*pos].opcode;
|
|
struct value *arg1;
|
|
struct value *arg2;
|
|
struct type *type;
|
|
switch (op)
|
|
{
|
|
case UNOP_IND:
|
|
if (noside == EVAL_SKIP)
|
|
goto standard;
|
|
(*pos)++;
|
|
arg1 = evaluate_subexp_java (NULL_TYPE, exp, pos, EVAL_NORMAL);
|
|
if (is_object_type (VALUE_TYPE (arg1)))
|
|
{
|
|
struct type *type;
|
|
|
|
type = type_from_class (java_class_from_object (arg1));
|
|
arg1 = value_cast (lookup_pointer_type (type), arg1);
|
|
}
|
|
if (noside == EVAL_SKIP)
|
|
goto nosideret;
|
|
return value_ind (arg1);
|
|
|
|
case BINOP_SUBSCRIPT:
|
|
(*pos)++;
|
|
arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
|
|
arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
|
|
if (noside == EVAL_SKIP)
|
|
goto nosideret;
|
|
/* If the user attempts to subscript something that is not an
|
|
array or pointer type (like a plain int variable for example),
|
|
then report this as an error. */
|
|
|
|
COERCE_REF (arg1);
|
|
type = check_typedef (VALUE_TYPE (arg1));
|
|
if (TYPE_CODE (type) == TYPE_CODE_PTR)
|
|
type = check_typedef (TYPE_TARGET_TYPE (type));
|
|
name = TYPE_NAME (type);
|
|
if (name == NULL)
|
|
name = TYPE_TAG_NAME (type);
|
|
i = name == NULL ? 0 : strlen (name);
|
|
if (TYPE_CODE (type) == TYPE_CODE_STRUCT
|
|
&& i > 2 && name[i - 1] == ']')
|
|
{
|
|
CORE_ADDR address;
|
|
long length, index;
|
|
struct type *el_type;
|
|
char buf4[4];
|
|
|
|
struct value *clas = java_class_from_object (arg1);
|
|
struct value *temp = clas;
|
|
/* Get CLASS_ELEMENT_TYPE of the array type. */
|
|
temp = value_struct_elt (&temp, NULL, "methods",
|
|
NULL, "structure");
|
|
VALUE_TYPE (temp) = VALUE_TYPE (clas);
|
|
el_type = type_from_class (temp);
|
|
if (TYPE_CODE (el_type) == TYPE_CODE_STRUCT)
|
|
el_type = lookup_pointer_type (el_type);
|
|
|
|
if (noside == EVAL_AVOID_SIDE_EFFECTS)
|
|
return value_zero (el_type, VALUE_LVAL (arg1));
|
|
address = value_as_address (arg1);
|
|
address += JAVA_OBJECT_SIZE;
|
|
read_memory (address, buf4, 4);
|
|
length = (long) extract_signed_integer (buf4, 4);
|
|
index = (long) value_as_long (arg2);
|
|
if (index >= length || index < 0)
|
|
error ("array index (%ld) out of bounds (length: %ld)",
|
|
index, length);
|
|
address = (address + 4) + index * TYPE_LENGTH (el_type);
|
|
return value_at (el_type, address, NULL);
|
|
}
|
|
else if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
|
|
{
|
|
if (noside == EVAL_AVOID_SIDE_EFFECTS)
|
|
return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
|
|
else
|
|
return value_subscript (arg1, arg2);
|
|
}
|
|
if (name)
|
|
error ("cannot subscript something of type `%s'", name);
|
|
else
|
|
error ("cannot subscript requested type");
|
|
|
|
case OP_STRING:
|
|
(*pos)++;
|
|
i = longest_to_int (exp->elts[pc + 1].longconst);
|
|
(*pos) += 3 + BYTES_TO_EXP_ELEM (i + 1);
|
|
if (noside == EVAL_SKIP)
|
|
goto nosideret;
|
|
return java_value_string (&exp->elts[pc + 2].string, i);
|
|
|
|
case STRUCTOP_STRUCT:
|
|
arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
|
|
/* Convert object field (such as TYPE.class) to reference. */
|
|
if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_STRUCT)
|
|
arg1 = value_addr (arg1);
|
|
return arg1;
|
|
default:
|
|
break;
|
|
}
|
|
standard:
|
|
return evaluate_subexp_standard (expect_type, exp, pos, noside);
|
|
nosideret:
|
|
return value_from_longest (builtin_type_long, (LONGEST) 1);
|
|
}
|
|
|
|
static struct type *
|
|
java_create_fundamental_type (struct objfile *objfile, int typeid)
|
|
{
|
|
switch (typeid)
|
|
{
|
|
case FT_VOID:
|
|
return java_void_type;
|
|
case FT_BOOLEAN:
|
|
return java_boolean_type;
|
|
case FT_CHAR:
|
|
return java_char_type;
|
|
case FT_FLOAT:
|
|
return java_float_type;
|
|
case FT_DBL_PREC_FLOAT:
|
|
return java_double_type;
|
|
case FT_BYTE:
|
|
case FT_SIGNED_CHAR:
|
|
return java_byte_type;
|
|
case FT_SHORT:
|
|
case FT_SIGNED_SHORT:
|
|
return java_short_type;
|
|
case FT_INTEGER:
|
|
case FT_SIGNED_INTEGER:
|
|
return java_int_type;
|
|
case FT_LONG:
|
|
case FT_SIGNED_LONG:
|
|
return java_long_type;
|
|
}
|
|
return c_create_fundamental_type (objfile, typeid);
|
|
}
|
|
|
|
static char *java_demangle (const char *mangled, int options)
|
|
{
|
|
return cplus_demangle (mangled, options | DMGL_JAVA);
|
|
}
|
|
|
|
|
|
/* Table mapping opcodes into strings for printing operators
|
|
and precedences of the operators. */
|
|
|
|
const struct op_print java_op_print_tab[] =
|
|
{
|
|
{",", BINOP_COMMA, PREC_COMMA, 0},
|
|
{"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
|
|
{"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
|
|
{"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
|
|
{"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
|
|
{"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
|
|
{"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
|
|
{"==", BINOP_EQUAL, PREC_EQUAL, 0},
|
|
{"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
|
|
{"<=", BINOP_LEQ, PREC_ORDER, 0},
|
|
{">=", BINOP_GEQ, PREC_ORDER, 0},
|
|
{">", BINOP_GTR, PREC_ORDER, 0},
|
|
{"<", BINOP_LESS, PREC_ORDER, 0},
|
|
{">>", BINOP_RSH, PREC_SHIFT, 0},
|
|
{"<<", BINOP_LSH, PREC_SHIFT, 0},
|
|
#if 0
|
|
{">>>", BINOP_ ? ? ?, PREC_SHIFT, 0},
|
|
#endif
|
|
{"+", BINOP_ADD, PREC_ADD, 0},
|
|
{"-", BINOP_SUB, PREC_ADD, 0},
|
|
{"*", BINOP_MUL, PREC_MUL, 0},
|
|
{"/", BINOP_DIV, PREC_MUL, 0},
|
|
{"%", BINOP_REM, PREC_MUL, 0},
|
|
{"-", UNOP_NEG, PREC_PREFIX, 0},
|
|
{"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
|
|
{"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
|
|
{"*", UNOP_IND, PREC_PREFIX, 0},
|
|
#if 0
|
|
{"instanceof", ? ? ?, ? ? ?, 0},
|
|
#endif
|
|
{"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
|
|
{"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
|
|
{NULL, 0, 0, 0}
|
|
};
|
|
|
|
const struct exp_descriptor exp_descriptor_java =
|
|
{
|
|
print_subexp_standard,
|
|
operator_length_standard,
|
|
op_name_standard,
|
|
dump_subexp_body_standard,
|
|
evaluate_subexp_java
|
|
};
|
|
|
|
const struct language_defn java_language_defn =
|
|
{
|
|
"java", /* Language name */
|
|
language_java,
|
|
c_builtin_types,
|
|
range_check_off,
|
|
type_check_off,
|
|
case_sensitive_on,
|
|
&exp_descriptor_java,
|
|
java_parse,
|
|
java_error,
|
|
c_printchar, /* Print a character constant */
|
|
c_printstr, /* Function to print string constant */
|
|
java_emit_char, /* Function to print a single character */
|
|
java_create_fundamental_type, /* Create fundamental type in this language */
|
|
java_print_type, /* Print a type using appropriate syntax */
|
|
java_val_print, /* Print a value using appropriate syntax */
|
|
java_value_print, /* Print a top-level value */
|
|
NULL, /* Language specific skip_trampoline */
|
|
value_of_this, /* value_of_this */
|
|
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
|
|
basic_lookup_transparent_type,/* lookup_transparent_type */
|
|
java_demangle, /* Language specific symbol demangler */
|
|
{"", "", "", ""}, /* Binary format info */
|
|
{"0%lo", "0", "o", ""}, /* Octal format info */
|
|
{"%ld", "", "d", ""}, /* Decimal format info */
|
|
{"0x%lx", "0x", "x", ""}, /* Hex format info */
|
|
java_op_print_tab, /* expression operators for printing */
|
|
0, /* not c-style arrays */
|
|
0, /* String lower bound */
|
|
&builtin_type_char, /* Type of string elements */
|
|
default_word_break_characters,
|
|
LANG_MAGIC
|
|
};
|
|
|
|
void
|
|
_initialize_java_language (void)
|
|
{
|
|
|
|
java_int_type = init_type (TYPE_CODE_INT, 4, 0, "int", NULL);
|
|
java_short_type = init_type (TYPE_CODE_INT, 2, 0, "short", NULL);
|
|
java_long_type = init_type (TYPE_CODE_INT, 8, 0, "long", NULL);
|
|
java_byte_type = init_type (TYPE_CODE_INT, 1, 0, "byte", NULL);
|
|
java_boolean_type = init_type (TYPE_CODE_BOOL, 1, 0, "boolean", NULL);
|
|
java_char_type = init_type (TYPE_CODE_CHAR, 2, TYPE_FLAG_UNSIGNED, "char", NULL);
|
|
java_float_type = init_type (TYPE_CODE_FLT, 4, 0, "float", NULL);
|
|
java_double_type = init_type (TYPE_CODE_FLT, 8, 0, "double", NULL);
|
|
java_void_type = init_type (TYPE_CODE_VOID, 1, 0, "void", NULL);
|
|
|
|
add_language (&java_language_defn);
|
|
}
|
|
|
|
/* Cleanup code that should be run on every "run".
|
|
We should use make_run_cleanup to have this be called.
|
|
But will that mess up values in value histry? FIXME */
|
|
|
|
extern void java_rerun_cleanup (void);
|
|
void
|
|
java_rerun_cleanup (void)
|
|
{
|
|
if (class_symtab != NULL)
|
|
{
|
|
free_symtab (class_symtab); /* ??? */
|
|
class_symtab = NULL;
|
|
}
|
|
if (dynamics_objfile != NULL)
|
|
{
|
|
free_objfile (dynamics_objfile);
|
|
dynamics_objfile = NULL;
|
|
}
|
|
|
|
java_object_type = NULL;
|
|
}
|