438 lines
12 KiB
C
438 lines
12 KiB
C
/* Support for printing Java values for GDB, the GNU debugger.
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Copyright 1997 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, 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 "value.h"
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#include "demangle.h"
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#include "valprint.h"
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#include "language.h"
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#include "jv-lang.h"
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#include "c-lang.h"
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int
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java_value_print (val, stream, format, pretty)
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value_ptr val;
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GDB_FILE *stream;
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int format;
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enum val_prettyprint pretty;
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{
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struct type *type = VALUE_TYPE (val);
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CORE_ADDR address = VALUE_ADDRESS (val) + VALUE_OFFSET (val);
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if (is_object_type (type))
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{
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CORE_ADDR obj_addr = unpack_pointer (type, VALUE_CONTENTS (val));
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if (obj_addr != 0)
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{
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value_ptr obj_val
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= value_at (TYPE_TARGET_TYPE (type), obj_addr, NULL);
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type = type_from_class (java_class_from_object (obj_val));
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type = lookup_pointer_type (type);
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}
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}
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if (TYPE_CODE (type) == TYPE_CODE_PTR && ! value_logical_not (val))
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{
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type_print (TYPE_TARGET_TYPE (type), "", stream, -1);
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}
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if (TYPE_CODE (type) == TYPE_CODE_STRUCT && TYPE_TAG_NAME (type) != NULL
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&& TYPE_TAG_NAME (type)[0] == '[')
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{
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char buf4[4];
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long length;
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unsigned int things_printed = 0;
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int i = 0;
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int reps;
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read_memory (address + JAVA_OBJECT_SIZE, buf4, 4);
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length = (long) extract_signed_integer (buf4, 4);
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fprintf_filtered (stream, "{length: %ld", length);
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if (TYPE_TAG_NAME (type)[1] == 'L'
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|| TYPE_TAG_NAME (type)[1] == '[')
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{
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CORE_ADDR element, next_element;
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address += JAVA_OBJECT_SIZE + 4; /* Skip object header and length. */
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while (i < length && things_printed < print_max)
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{
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char buf[TARGET_PTR_BIT / HOST_CHAR_BIT];
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fputs_filtered (", ", stream);
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wrap_here (n_spaces (2));
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if (i > 0)
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element = next_element;
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else
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{
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read_memory (address, buf, sizeof(buf));
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address += TARGET_PTR_BIT / HOST_CHAR_BIT;
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element = extract_address (buf, sizeof(buf));
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}
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for (reps = 1; i + reps < length; reps++)
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{
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read_memory (address, buf, sizeof(buf));
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address += TARGET_PTR_BIT / HOST_CHAR_BIT;
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next_element = extract_address (buf, sizeof(buf));
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if (next_element != element)
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break;
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}
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if (reps == 1)
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fprintf_filtered (stream, "%d: ", i);
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else
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fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
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if (element == 0)
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fprintf_filtered (stream, "null");
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else
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fprintf_filtered (stream, "@%x", element);
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things_printed++;
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i += reps;
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}
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}
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else
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{
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struct type *el_type = java_primitive_type (TYPE_TAG_NAME (type)[1]);
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value_ptr v = allocate_value (el_type);
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value_ptr next_v = allocate_value (el_type);
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VALUE_ADDRESS (v) = address + JAVA_OBJECT_SIZE + 4;
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VALUE_ADDRESS (next_v) = VALUE_ADDRESS (v);
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while (i < length && things_printed < print_max)
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{
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fputs_filtered (", ", stream);
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wrap_here (n_spaces (2));
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if (i > 0)
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{
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value_ptr tmp = next_v; next_v = v; v = tmp;
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}
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else
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{
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VALUE_LAZY (v) = 1;
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VALUE_OFFSET (v) = 0;
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}
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VALUE_OFFSET (next_v) = VALUE_OFFSET (v);
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for (reps = 1; i + reps < length; reps++)
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{
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VALUE_LAZY (next_v) = 1;
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VALUE_OFFSET (next_v) += TYPE_LENGTH (el_type);
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if (memcmp (VALUE_CONTENTS (v), VALUE_CONTENTS (next_v),
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TYPE_LENGTH (el_type)) != 0)
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break;
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}
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if (reps == 1)
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fprintf_filtered (stream, "%d: ", i);
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else
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fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
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val_print (VALUE_TYPE (v), VALUE_CONTENTS (v), 0,
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stream, format, 2, 1, pretty);
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things_printed++;
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i += reps;
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}
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}
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if (i < length)
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fprintf_filtered (stream, "...");
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fprintf_filtered (stream, "}");
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return 0;
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}
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return (val_print (type, VALUE_CONTENTS (val), address,
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stream, format, 1, 0, pretty));
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}
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/* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
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same meanings as in cp_print_value and c_val_print.
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DONT_PRINT is an array of baseclass types that we
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should not print, or zero if called from top level. */
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void
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java_print_value_fields (type, valaddr, address, stream,
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format, recurse, pretty)
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struct type *type;
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char *valaddr;
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CORE_ADDR address;
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GDB_FILE *stream;
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int format;
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int recurse;
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enum val_prettyprint pretty;
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{
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int i, len, n_baseclasses;
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CHECK_TYPEDEF (type);
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fprintf_filtered (stream, "{");
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len = TYPE_NFIELDS (type);
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n_baseclasses = TYPE_N_BASECLASSES (type);
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if (n_baseclasses > 0)
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{
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int i, n_baseclasses = TYPE_N_BASECLASSES (type);
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for (i = 0; i < n_baseclasses; i++)
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{
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int boffset;
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struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
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char *basename = TYPE_NAME (baseclass);
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char *base_valaddr;
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if (BASETYPE_VIA_VIRTUAL (type, i))
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continue;
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if (basename != NULL && strcmp (basename, "java.lang.Object") == 0)
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continue;
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boffset = 0;
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if (pretty)
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{
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fprintf_filtered (stream, "\n");
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print_spaces_filtered (2 * (recurse+1), stream);
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}
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fputs_filtered ("<", stream);
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/* Not sure what the best notation is in the case where there is no
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baseclass name. */
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fputs_filtered (basename ? basename : "", stream);
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fputs_filtered ("> = ", stream);
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base_valaddr = valaddr;
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java_print_value_fields (baseclass, base_valaddr, address + boffset,
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stream, format, recurse+1, pretty);
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fputs_filtered (", ", stream);
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flush_it:
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;
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}
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}
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if (!len && n_baseclasses == 1)
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fprintf_filtered (stream, "<No data fields>");
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else
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{
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extern int inspect_it;
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int fields_seen = 0;
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for (i = n_baseclasses; i < len; i++)
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{
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/* If requested, skip printing of static fields. */
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if (TYPE_FIELD_STATIC (type, i))
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{
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char *name = TYPE_FIELD_NAME (type, i);
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if (!static_field_print)
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continue;
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if (name != NULL && strcmp (name, "class") == 0)
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continue;
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}
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if (fields_seen)
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fprintf_filtered (stream, ", ");
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else if (n_baseclasses > 0)
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{
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if (pretty)
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{
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fprintf_filtered (stream, "\n");
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print_spaces_filtered (2 + 2 * recurse, stream);
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fputs_filtered ("members of ", stream);
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fputs_filtered (type_name_no_tag (type), stream);
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fputs_filtered (": ", stream);
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}
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}
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fields_seen = 1;
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if (pretty)
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{
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fprintf_filtered (stream, "\n");
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print_spaces_filtered (2 + 2 * recurse, stream);
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}
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else
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{
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wrap_here (n_spaces (2 + 2 * recurse));
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}
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if (inspect_it)
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{
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if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
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fputs_filtered ("\"( ptr \"", stream);
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else
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fputs_filtered ("\"( nodef \"", stream);
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if (TYPE_FIELD_STATIC (type, i))
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fputs_filtered ("static ", stream);
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fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
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language_cplus,
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DMGL_PARAMS | DMGL_ANSI);
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fputs_filtered ("\" \"", stream);
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fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
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language_cplus,
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DMGL_PARAMS | DMGL_ANSI);
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fputs_filtered ("\") \"", stream);
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}
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else
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{
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annotate_field_begin (TYPE_FIELD_TYPE (type, i));
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if (TYPE_FIELD_STATIC (type, i))
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fputs_filtered ("static ", stream);
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fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
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language_cplus,
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DMGL_PARAMS | DMGL_ANSI);
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annotate_field_name_end ();
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fputs_filtered (": ", stream);
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annotate_field_value ();
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}
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if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))
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{
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value_ptr v;
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/* Bitfields require special handling, especially due to byte
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order problems. */
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if (TYPE_FIELD_IGNORE (type, i))
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{
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fputs_filtered ("<optimized out or zero length>", stream);
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}
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else
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{
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v = value_from_longest (TYPE_FIELD_TYPE (type, i),
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unpack_field_as_long (type, valaddr, i));
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val_print (TYPE_FIELD_TYPE(type, i), VALUE_CONTENTS (v), 0,
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stream, format, 0, recurse + 1, pretty);
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}
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}
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else
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{
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if (TYPE_FIELD_IGNORE (type, i))
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{
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fputs_filtered ("<optimized out or zero length>", stream);
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}
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else if (TYPE_FIELD_STATIC (type, i))
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{
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value_ptr v = value_static_field (type, i);
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if (v == NULL)
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fputs_filtered ("<optimized out>", stream);
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else
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{
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struct type *t = check_typedef (VALUE_TYPE (v));
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if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
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v = value_addr (v);
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val_print (VALUE_TYPE (v),
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VALUE_CONTENTS (v), VALUE_ADDRESS (v),
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stream, format, 0, recurse+1, pretty);
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}
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}
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else
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{
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val_print (TYPE_FIELD_TYPE (type, i),
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valaddr + TYPE_FIELD_BITPOS (type, i) / 8,
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address + TYPE_FIELD_BITPOS (type, i) / 8,
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stream, format, 0, recurse + 1, pretty);
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}
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}
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annotate_field_end ();
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}
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if (pretty)
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{
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fprintf_filtered (stream, "\n");
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print_spaces_filtered (2 * recurse, stream);
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}
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}
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fprintf_filtered (stream, "}");
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}
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int
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java_val_print (type, valaddr, address, stream, format, deref_ref, recurse,
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pretty)
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struct type *type;
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char *valaddr;
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CORE_ADDR address;
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GDB_FILE *stream;
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int format;
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int deref_ref;
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int recurse;
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enum val_prettyprint pretty;
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{
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register unsigned int i = 0; /* Number of characters printed */
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struct type *elttype;
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CORE_ADDR addr;
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CHECK_TYPEDEF (type);
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switch (TYPE_CODE (type))
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{
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case TYPE_CODE_PTR:
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if (format && format != 's')
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{
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print_scalar_formatted (valaddr, type, format, 0, stream);
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break;
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}
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#if 0
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if (vtblprint && cp_is_vtbl_ptr_type(type))
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{
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/* Print the unmangled name if desired. */
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/* Print vtable entry - we only get here if we ARE using
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-fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
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print_address_demangle(extract_address (valaddr, TYPE_LENGTH (type)),
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stream, demangle);
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break;
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}
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#endif
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addr = unpack_pointer (type, valaddr);
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if (addr == 0)
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{
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fputs_filtered ("null", stream);
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return i;
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}
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elttype = check_typedef (TYPE_TARGET_TYPE (type));
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{
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print_unpacked_pointer:
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elttype = check_typedef (TYPE_TARGET_TYPE (type));
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if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
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{
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/* Try to print what function it points to. */
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print_address_demangle (addr, stream, demangle);
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/* Return value is irrelevant except for string pointers. */
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return (0);
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}
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if (addressprint && format != 's')
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{
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fputs_filtered ("@", stream);
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print_longest (stream, 'x', 0, (ULONGEST) addr);
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}
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return i;
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}
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case TYPE_CODE_CHAR:
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format = format ? format : output_format;
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if (format)
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{
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print_scalar_formatted (valaddr, type, format, 0, stream);
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}
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else
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{
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LA_PRINT_CHAR ((int) unpack_long (type, valaddr), stream);
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}
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break;
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case TYPE_CODE_STRUCT:
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java_print_value_fields (type, valaddr, address, stream, format,
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recurse, pretty);
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break;
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default:
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return c_val_print (type, valaddr, address, stream, format,
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deref_ref, recurse, pretty);
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}
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}
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