NetBSD/gnu/dist/gdb/jv-valprint.c

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1999-02-11 01:06:10 +03:00
/* Support for printing Java values for GDB, the GNU debugger.
Copyright 1997 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "value.h"
#include "demangle.h"
#include "valprint.h"
#include "language.h"
#include "jv-lang.h"
#include "c-lang.h"
int
java_value_print (val, stream, format, pretty)
value_ptr val;
GDB_FILE *stream;
int format;
enum val_prettyprint pretty;
{
struct type *type = VALUE_TYPE (val);
CORE_ADDR address = VALUE_ADDRESS (val) + VALUE_OFFSET (val);
if (is_object_type (type))
{
CORE_ADDR obj_addr = unpack_pointer (type, VALUE_CONTENTS (val));
if (obj_addr != 0)
{
value_ptr obj_val
= value_at (TYPE_TARGET_TYPE (type), obj_addr, NULL);
type = type_from_class (java_class_from_object (obj_val));
type = lookup_pointer_type (type);
}
}
if (TYPE_CODE (type) == TYPE_CODE_PTR && ! value_logical_not (val))
{
type_print (TYPE_TARGET_TYPE (type), "", stream, -1);
}
if (TYPE_CODE (type) == TYPE_CODE_STRUCT && TYPE_TAG_NAME (type) != NULL
&& TYPE_TAG_NAME (type)[0] == '[')
{
char buf4[4];
long length;
unsigned int things_printed = 0;
int i = 0;
int reps;
read_memory (address + JAVA_OBJECT_SIZE, buf4, 4);
length = (long) extract_signed_integer (buf4, 4);
fprintf_filtered (stream, "{length: %ld", length);
if (TYPE_TAG_NAME (type)[1] == 'L'
|| TYPE_TAG_NAME (type)[1] == '[')
{
CORE_ADDR element, next_element;
address += JAVA_OBJECT_SIZE + 4; /* Skip object header and length. */
while (i < length && things_printed < print_max)
{
char buf[TARGET_PTR_BIT / 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 += TARGET_PTR_BIT / HOST_CHAR_BIT;
element = extract_address (buf, sizeof(buf));
}
for (reps = 1; i + reps < length; reps++)
{
read_memory (address, buf, sizeof(buf));
address += TARGET_PTR_BIT / HOST_CHAR_BIT;
next_element = extract_address (buf, sizeof(buf));
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, "@%x", element);
things_printed++;
i += reps;
}
}
else
{
struct type *el_type = java_primitive_type (TYPE_TAG_NAME (type)[1]);
value_ptr v = allocate_value (el_type);
value_ptr next_v = allocate_value (el_type);
VALUE_ADDRESS (v) = address + JAVA_OBJECT_SIZE + 4;
VALUE_ADDRESS (next_v) = VALUE_ADDRESS (v);
while (i < length && things_printed < print_max)
{
fputs_filtered (", ", stream);
wrap_here (n_spaces (2));
if (i > 0)
{
value_ptr tmp = next_v; next_v = v; v = tmp;
}
else
{
VALUE_LAZY (v) = 1;
VALUE_OFFSET (v) = 0;
}
VALUE_OFFSET (next_v) = VALUE_OFFSET (v);
for (reps = 1; i + reps < length; reps++)
{
VALUE_LAZY (next_v) = 1;
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);
val_print (VALUE_TYPE (v), VALUE_CONTENTS (v), 0,
stream, format, 2, 1, pretty);
things_printed++;
i += reps;
}
}
if (i < length)
fprintf_filtered (stream, "...");
fprintf_filtered (stream, "}");
return 0;
}
return (val_print (type, VALUE_CONTENTS (val), address,
stream, format, 1, 0, pretty));
}
/* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
same meanings as in cp_print_value and c_val_print.
DONT_PRINT is an array of baseclass types that we
should not print, or zero if called from top level. */
void
java_print_value_fields (type, valaddr, address, stream,
format, recurse, pretty)
struct type *type;
char *valaddr;
CORE_ADDR address;
GDB_FILE *stream;
int format;
int recurse;
enum val_prettyprint pretty;
{
int i, len, n_baseclasses;
CHECK_TYPEDEF (type);
fprintf_filtered (stream, "{");
len = TYPE_NFIELDS (type);
n_baseclasses = TYPE_N_BASECLASSES (type);
if (n_baseclasses > 0)
{
int i, n_baseclasses = TYPE_N_BASECLASSES (type);
for (i = 0; i < n_baseclasses; i++)
{
int boffset;
struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
char *basename = TYPE_NAME (baseclass);
char *base_valaddr;
if (BASETYPE_VIA_VIRTUAL (type, i))
continue;
if (basename != NULL && strcmp (basename, "java.lang.Object") == 0)
continue;
boffset = 0;
if (pretty)
{
fprintf_filtered (stream, "\n");
print_spaces_filtered (2 * (recurse+1), stream);
}
fputs_filtered ("<", stream);
/* Not sure what the best notation is in the case where there is no
baseclass name. */
fputs_filtered (basename ? basename : "", stream);
fputs_filtered ("> = ", stream);
base_valaddr = valaddr;
java_print_value_fields (baseclass, base_valaddr, address + boffset,
stream, format, recurse+1, pretty);
fputs_filtered (", ", stream);
flush_it:
;
}
}
if (!len && n_baseclasses == 1)
fprintf_filtered (stream, "<No data fields>");
else
{
extern int inspect_it;
int fields_seen = 0;
for (i = n_baseclasses; i < len; i++)
{
/* If requested, skip printing of static fields. */
if (TYPE_FIELD_STATIC (type, i))
{
char *name = TYPE_FIELD_NAME (type, i);
if (!static_field_print)
continue;
if (name != NULL && strcmp (name, "class") == 0)
continue;
}
if (fields_seen)
fprintf_filtered (stream, ", ");
else if (n_baseclasses > 0)
{
if (pretty)
{
fprintf_filtered (stream, "\n");
print_spaces_filtered (2 + 2 * recurse, stream);
fputs_filtered ("members of ", stream);
fputs_filtered (type_name_no_tag (type), stream);
fputs_filtered (": ", stream);
}
}
fields_seen = 1;
if (pretty)
{
fprintf_filtered (stream, "\n");
print_spaces_filtered (2 + 2 * recurse, stream);
}
else
{
wrap_here (n_spaces (2 + 2 * recurse));
}
if (inspect_it)
{
if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
fputs_filtered ("\"( ptr \"", stream);
else
fputs_filtered ("\"( nodef \"", stream);
if (TYPE_FIELD_STATIC (type, i))
fputs_filtered ("static ", stream);
fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
language_cplus,
DMGL_PARAMS | DMGL_ANSI);
fputs_filtered ("\" \"", stream);
fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
language_cplus,
DMGL_PARAMS | DMGL_ANSI);
fputs_filtered ("\") \"", stream);
}
else
{
annotate_field_begin (TYPE_FIELD_TYPE (type, i));
if (TYPE_FIELD_STATIC (type, i))
fputs_filtered ("static ", stream);
fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
language_cplus,
DMGL_PARAMS | DMGL_ANSI);
annotate_field_name_end ();
fputs_filtered (": ", stream);
annotate_field_value ();
}
if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))
{
value_ptr v;
/* Bitfields require special handling, especially due to byte
order problems. */
if (TYPE_FIELD_IGNORE (type, i))
{
fputs_filtered ("<optimized out or zero length>", stream);
}
else
{
v = value_from_longest (TYPE_FIELD_TYPE (type, i),
unpack_field_as_long (type, valaddr, i));
val_print (TYPE_FIELD_TYPE(type, i), VALUE_CONTENTS (v), 0,
stream, format, 0, recurse + 1, pretty);
}
}
else
{
if (TYPE_FIELD_IGNORE (type, i))
{
fputs_filtered ("<optimized out or zero length>", stream);
}
else if (TYPE_FIELD_STATIC (type, i))
{
value_ptr v = value_static_field (type, i);
if (v == NULL)
fputs_filtered ("<optimized out>", stream);
else
{
struct type *t = check_typedef (VALUE_TYPE (v));
if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
v = value_addr (v);
val_print (VALUE_TYPE (v),
VALUE_CONTENTS (v), VALUE_ADDRESS (v),
stream, format, 0, recurse+1, pretty);
}
}
else
{
val_print (TYPE_FIELD_TYPE (type, i),
valaddr + TYPE_FIELD_BITPOS (type, i) / 8,
address + TYPE_FIELD_BITPOS (type, i) / 8,
stream, format, 0, recurse + 1, pretty);
}
}
annotate_field_end ();
}
if (pretty)
{
fprintf_filtered (stream, "\n");
print_spaces_filtered (2 * recurse, stream);
}
}
fprintf_filtered (stream, "}");
}
int
java_val_print (type, valaddr, address, stream, format, deref_ref, recurse,
pretty)
struct type *type;
char *valaddr;
CORE_ADDR address;
GDB_FILE *stream;
int format;
int deref_ref;
int recurse;
enum val_prettyprint pretty;
{
register unsigned int i = 0; /* Number of characters printed */
struct type *elttype;
CORE_ADDR addr;
CHECK_TYPEDEF (type);
switch (TYPE_CODE (type))
{
case TYPE_CODE_PTR:
if (format && format != 's')
{
print_scalar_formatted (valaddr, type, format, 0, stream);
break;
}
#if 0
if (vtblprint && cp_is_vtbl_ptr_type(type))
{
/* Print the unmangled name if desired. */
/* Print vtable entry - we only get here if we ARE using
-fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
print_address_demangle(extract_address (valaddr, TYPE_LENGTH (type)),
stream, demangle);
break;
}
#endif
addr = unpack_pointer (type, valaddr);
if (addr == 0)
{
fputs_filtered ("null", stream);
return i;
}
elttype = check_typedef (TYPE_TARGET_TYPE (type));
{
print_unpacked_pointer:
elttype = check_typedef (TYPE_TARGET_TYPE (type));
if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
{
/* Try to print what function it points to. */
print_address_demangle (addr, stream, demangle);
/* Return value is irrelevant except for string pointers. */
return (0);
}
if (addressprint && format != 's')
{
fputs_filtered ("@", stream);
print_longest (stream, 'x', 0, (ULONGEST) addr);
}
return i;
}
case TYPE_CODE_CHAR:
format = format ? format : output_format;
if (format)
{
print_scalar_formatted (valaddr, type, format, 0, stream);
}
else
{
LA_PRINT_CHAR ((int) unpack_long (type, valaddr), stream);
}
break;
case TYPE_CODE_STRUCT:
java_print_value_fields (type, valaddr, address, stream, format,
recurse, pretty);
break;
default:
return c_val_print (type, valaddr, address, stream, format,
deref_ref, recurse, pretty);
}
}