static struct value *
evaluate_subexp_java (struct type *expect_type, struct expression *exp,
int *pos, enum noside noside)
{
int pc = *pos;
int i;
const 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 (exp->gdbarch, java_class_from_object (arg1));
arg1 = value_cast (lookup_pointer_type (type), arg1);
}
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. */
arg1 = 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] == ']')
{
enum bfd_endian byte_order = gdbarch_byte_order (exp->gdbarch);
CORE_ADDR address;
long length, index;
struct type *el_type;
gdb_byte 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");
deprecated_set_value_type (temp, value_type (clas));
el_type = type_from_class (exp->gdbarch, 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 += get_java_object_header_size (exp->gdbarch);
read_memory (address, buf4, 4);
length = (long) extract_signed_integer (buf4, 4, byte_order);
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);
}
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, value_as_long (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_PTR:
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 (exp->gdbarch)->builtin_int, 1);
}
int
java_value_print (struct value *val, struct ui_file *stream,
const struct value_print_options *options)
{
struct gdbarch *gdbarch = get_type_arch (value_type (val));
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct type *type;
CORE_ADDR address;
int i;
char *name;
struct value_print_options opts;
type = value_type (val);
address = value_address (val);
if (is_object_type (type))
{
CORE_ADDR obj_addr;
/* Get the run-time type, and cast the object into that */
obj_addr = unpack_pointer (type, value_contents (val));
if (obj_addr != 0)
{
type = type_from_class (gdbarch, java_class_from_object (val));
type = lookup_pointer_type (type);
val = value_at (type, address);
}
}
if (TYPE_CODE (type) == TYPE_CODE_PTR && !value_logical_not (val))
type_print (TYPE_TARGET_TYPE (type), "", stream, -1);
name = TYPE_TAG_NAME (type);
if (TYPE_CODE (type) == TYPE_CODE_STRUCT && name != NULL
&& (i = strlen (name), name[i - 1] == ']'))
{
gdb_byte buf4[4];
long length;
unsigned int things_printed = 0;
int reps;
struct type *el_type
= java_primitive_type_from_name (gdbarch, name, i - 2);
i = 0;
read_memory (address + get_java_object_header_size (gdbarch), buf4, 4);
length = (long) extract_signed_integer (buf4, 4, byte_order);
fprintf_filtered (stream, "{length: %ld", length);
if (el_type == NULL)
{
CORE_ADDR element;
CORE_ADDR next_element = -1; /* dummy initial value */
/* Skip object header and length. */
address += get_java_object_header_size (gdbarch) + 4;
while (i < length && things_printed < options->print_max)
{
gdb_byte *buf;
buf = alloca (gdbarch_ptr_bit (gdbarch) / HOST_CHAR_BIT);
fputs_filtered (", ", stream);
wrap_here (n_spaces (2));
if (i > 0)
element = next_element;
else
{
read_memory (address, buf, sizeof (buf));
address += gdbarch_ptr_bit (gdbarch) / HOST_CHAR_BIT;
/* FIXME: cagney/2003-05-24: Bogus or what. It
pulls a host sized pointer out of the target and
then extracts that as an address (while assuming
that the address is unsigned)! */
element = extract_unsigned_integer (buf, sizeof (buf),
byte_order);
}
for (reps = 1; i + reps < length; reps++)
{
read_memory (address, buf, sizeof (buf));
address += gdbarch_ptr_bit (gdbarch) / HOST_CHAR_BIT;
/* FIXME: cagney/2003-05-24: Bogus or what. It
pulls a host sized pointer out of the target and
then extracts that as an address (while assuming
that the address is unsigned)! */
next_element = extract_unsigned_integer (buf, sizeof (buf),
byte_order);
if (next_element != element)
break;
}
if (reps == 1)
fprintf_filtered (stream, "%d: ", i);
else
fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
if (element == 0)
fprintf_filtered (stream, "null");
else
fprintf_filtered (stream, "@%s", paddress (gdbarch, element));
things_printed++;
i += reps;
}
}
else
{
struct value *v = allocate_value (el_type);
struct value *next_v = allocate_value (el_type);
set_value_address (v, (address
+ get_java_object_header_size (gdbarch) + 4));
set_value_address (next_v, value_raw_address (v));
while (i < length && things_printed < options->print_max)
{
fputs_filtered (", ", stream);
wrap_here (n_spaces (2));
if (i > 0)
{
struct value *tmp;
tmp = next_v;
next_v = v;
v = tmp;
}
else
{
set_value_lazy (v, 1);
set_value_offset (v, 0);
}
set_value_offset (next_v, value_offset (v));
for (reps = 1; i + reps < length; reps++)
{
set_value_lazy (next_v, 1);
set_value_offset (next_v, value_offset (next_v) + TYPE_LENGTH (el_type));
if (memcmp (value_contents (v), value_contents (next_v),
TYPE_LENGTH (el_type)) != 0)
break;
}
if (reps == 1)
fprintf_filtered (stream, "%d: ", i);
else
fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
opts = *options;
opts.deref_ref = 1;
common_val_print (v, stream, 1, &opts, current_language);
things_printed++;
i += reps;
}
}
if (i < length)
fprintf_filtered (stream, "...");
fprintf_filtered (stream, "}");
return 0;
}
/* If it's type String, print it */
if (TYPE_CODE (type) == TYPE_CODE_PTR
&& TYPE_TARGET_TYPE (type)
&& TYPE_TAG_NAME (TYPE_TARGET_TYPE (type))
&& strcmp (TYPE_TAG_NAME (TYPE_TARGET_TYPE (type)),
"java.lang.String") == 0
&& (options->format == 0 || options->format == 's')
&& address != 0
&& value_as_address (val) != 0)
{
struct type *char_type;
struct value *data_val;
CORE_ADDR data;
struct value *boffset_val;
unsigned long boffset;
struct value *count_val;
unsigned long count;
struct value *mark;
mark = value_mark (); /* Remember start of new values */
data_val = value_struct_elt (&val, NULL, "data", NULL, NULL);
data = value_as_address (data_val);
boffset_val = value_struct_elt (&val, NULL, "boffset", NULL, NULL);
boffset = value_as_address (boffset_val);
count_val = value_struct_elt (&val, NULL, "count", NULL, NULL);
count = value_as_address (count_val);
value_free_to_mark (mark); /* Release unnecessary values */
char_type = builtin_java_type (gdbarch)->builtin_char;
val_print_string (char_type, data + boffset, count, stream, options);
return 0;
}
opts = *options;
opts.deref_ref = 1;
return common_val_print (val, stream, 0, &opts, current_language);
}
