1 /* Support for printing Java values for GDB, the GNU debugger.
3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007,
4 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "expression.h"
33 #include "gdb_string.h"
38 java_value_print (struct value *val, struct ui_file *stream,
39 const struct value_print_options *options)
41 struct gdbarch *gdbarch = get_type_arch (value_type (val));
42 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
47 struct value_print_options opts;
49 type = value_type (val);
50 address = value_address (val);
52 if (is_object_type (type))
56 /* Get the run-time type, and cast the object into that. */
58 obj_addr = unpack_pointer (type, value_contents (val));
62 type = type_from_class (gdbarch, java_class_from_object (val));
63 type = lookup_pointer_type (type);
65 val = value_at (type, address);
69 if (TYPE_CODE (type) == TYPE_CODE_PTR && !value_logical_not (val))
70 type_print (TYPE_TARGET_TYPE (type), "", stream, -1);
72 name = TYPE_TAG_NAME (type);
73 if (TYPE_CODE (type) == TYPE_CODE_STRUCT && name != NULL
74 && (i = strlen (name), name[i - 1] == ']'))
78 unsigned int things_printed = 0;
81 = java_primitive_type_from_name (gdbarch, name, i - 2);
84 read_memory (address + get_java_object_header_size (gdbarch), buf4, 4);
86 length = (long) extract_signed_integer (buf4, 4, byte_order);
87 fprintf_filtered (stream, "{length: %ld", length);
92 CORE_ADDR next_element = -1; /* Dummy initial value. */
94 /* Skip object header and length. */
95 address += get_java_object_header_size (gdbarch) + 4;
97 while (i < length && things_printed < options->print_max)
101 buf = alloca (gdbarch_ptr_bit (gdbarch) / HOST_CHAR_BIT);
102 fputs_filtered (", ", stream);
103 wrap_here (n_spaces (2));
106 element = next_element;
109 read_memory (address, buf, sizeof (buf));
110 address += gdbarch_ptr_bit (gdbarch) / HOST_CHAR_BIT;
111 /* FIXME: cagney/2003-05-24: Bogus or what. It
112 pulls a host sized pointer out of the target and
113 then extracts that as an address (while assuming
114 that the address is unsigned)! */
115 element = extract_unsigned_integer (buf, sizeof (buf),
119 for (reps = 1; i + reps < length; reps++)
121 read_memory (address, buf, sizeof (buf));
122 address += gdbarch_ptr_bit (gdbarch) / HOST_CHAR_BIT;
123 /* FIXME: cagney/2003-05-24: Bogus or what. It
124 pulls a host sized pointer out of the target and
125 then extracts that as an address (while assuming
126 that the address is unsigned)! */
127 next_element = extract_unsigned_integer (buf, sizeof (buf),
129 if (next_element != element)
134 fprintf_filtered (stream, "%d: ", i);
136 fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
139 fprintf_filtered (stream, "null");
141 fprintf_filtered (stream, "@%s", paddress (gdbarch, element));
149 struct value *v = allocate_value (el_type);
150 struct value *next_v = allocate_value (el_type);
152 set_value_address (v, (address
153 + get_java_object_header_size (gdbarch) + 4));
154 set_value_address (next_v, value_raw_address (v));
156 while (i < length && things_printed < options->print_max)
158 fputs_filtered (", ", stream);
159 wrap_here (n_spaces (2));
171 set_value_lazy (v, 1);
172 set_value_offset (v, 0);
175 set_value_offset (next_v, value_offset (v));
177 for (reps = 1; i + reps < length; reps++)
179 set_value_lazy (next_v, 1);
180 set_value_offset (next_v, value_offset (next_v)
181 + TYPE_LENGTH (el_type));
182 value_fetch_lazy (next_v);
183 if (!(value_available_contents_eq
184 (v, value_embedded_offset (v),
185 next_v, value_embedded_offset (next_v),
186 TYPE_LENGTH (el_type))))
191 fprintf_filtered (stream, "%d: ", i);
193 fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
197 common_val_print (v, stream, 1, &opts, current_language);
205 fprintf_filtered (stream, "...");
207 fprintf_filtered (stream, "}");
212 /* If it's type String, print it. */
214 if (TYPE_CODE (type) == TYPE_CODE_PTR
215 && TYPE_TARGET_TYPE (type)
216 && TYPE_TAG_NAME (TYPE_TARGET_TYPE (type))
217 && strcmp (TYPE_TAG_NAME (TYPE_TARGET_TYPE (type)),
218 "java.lang.String") == 0
219 && (options->format == 0 || options->format == 's')
221 && value_as_address (val) != 0)
223 struct type *char_type;
224 struct value *data_val;
226 struct value *boffset_val;
227 unsigned long boffset;
228 struct value *count_val;
232 mark = value_mark (); /* Remember start of new values. */
234 data_val = value_struct_elt (&val, NULL, "data", NULL, NULL);
235 data = value_as_address (data_val);
237 boffset_val = value_struct_elt (&val, NULL, "boffset", NULL, NULL);
238 boffset = value_as_address (boffset_val);
240 count_val = value_struct_elt (&val, NULL, "count", NULL, NULL);
241 count = value_as_address (count_val);
243 value_free_to_mark (mark); /* Release unnecessary values. */
245 char_type = builtin_java_type (gdbarch)->builtin_char;
246 val_print_string (char_type, NULL, data + boffset, count, stream,
254 return common_val_print (val, stream, 0, &opts, current_language);
257 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the
258 same meanings as in cp_print_value and c_val_print.
260 DONT_PRINT is an array of baseclass types that we
261 should not print, or zero if called from top level. */
264 java_print_value_fields (struct type *type, const gdb_byte *valaddr,
266 CORE_ADDR address, struct ui_file *stream,
268 const struct value *val,
269 const struct value_print_options *options)
271 int i, len, n_baseclasses;
273 CHECK_TYPEDEF (type);
275 fprintf_filtered (stream, "{");
276 len = TYPE_NFIELDS (type);
277 n_baseclasses = TYPE_N_BASECLASSES (type);
279 if (n_baseclasses > 0)
281 int i, n_baseclasses = TYPE_N_BASECLASSES (type);
283 for (i = 0; i < n_baseclasses; i++)
286 struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
287 char *basename = TYPE_NAME (baseclass);
288 const gdb_byte *base_valaddr;
290 if (BASETYPE_VIA_VIRTUAL (type, i))
293 if (basename != NULL && strcmp (basename, "java.lang.Object") == 0)
300 fprintf_filtered (stream, "\n");
301 print_spaces_filtered (2 * (recurse + 1), stream);
303 fputs_filtered ("<", stream);
304 /* Not sure what the best notation is in the case where there is no
306 fputs_filtered (basename ? basename : "", stream);
307 fputs_filtered ("> = ", stream);
309 base_valaddr = valaddr;
311 java_print_value_fields (baseclass, base_valaddr,
312 offset + boffset, address,
313 stream, recurse + 1, val, options);
314 fputs_filtered (", ", stream);
318 if (!len && n_baseclasses == 1)
319 fprintf_filtered (stream, "<No data fields>");
324 for (i = n_baseclasses; i < len; i++)
326 /* If requested, skip printing of static fields. */
327 if (field_is_static (&TYPE_FIELD (type, i)))
329 char *name = TYPE_FIELD_NAME (type, i);
331 if (!options->static_field_print)
333 if (name != NULL && strcmp (name, "class") == 0)
337 fprintf_filtered (stream, ", ");
338 else if (n_baseclasses > 0)
342 fprintf_filtered (stream, "\n");
343 print_spaces_filtered (2 + 2 * recurse, stream);
344 fputs_filtered ("members of ", stream);
345 fputs_filtered (type_name_no_tag (type), stream);
346 fputs_filtered (": ", stream);
353 fprintf_filtered (stream, "\n");
354 print_spaces_filtered (2 + 2 * recurse, stream);
358 wrap_here (n_spaces (2 + 2 * recurse));
360 if (options->inspect_it)
362 if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
363 fputs_filtered ("\"( ptr \"", stream);
365 fputs_filtered ("\"( nodef \"", stream);
366 if (field_is_static (&TYPE_FIELD (type, i)))
367 fputs_filtered ("static ", stream);
368 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
370 DMGL_PARAMS | DMGL_ANSI);
371 fputs_filtered ("\" \"", stream);
372 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
374 DMGL_PARAMS | DMGL_ANSI);
375 fputs_filtered ("\") \"", stream);
379 annotate_field_begin (TYPE_FIELD_TYPE (type, i));
381 if (field_is_static (&TYPE_FIELD (type, i)))
382 fputs_filtered ("static ", stream);
383 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
385 DMGL_PARAMS | DMGL_ANSI);
386 annotate_field_name_end ();
387 fputs_filtered (": ", stream);
388 annotate_field_value ();
391 if (!field_is_static (&TYPE_FIELD (type, i))
392 && TYPE_FIELD_PACKED (type, i))
396 /* Bitfields require special handling, especially due to byte
398 if (TYPE_FIELD_IGNORE (type, i))
400 fputs_filtered ("<optimized out or zero length>", stream);
402 else if (value_bits_synthetic_pointer (val,
403 TYPE_FIELD_BITPOS (type,
405 TYPE_FIELD_BITSIZE (type,
408 fputs_filtered (_("<synthetic pointer>"), stream);
410 else if (!value_bits_valid (val, TYPE_FIELD_BITPOS (type, i),
411 TYPE_FIELD_BITSIZE (type, i)))
413 val_print_optimized_out (stream);
417 struct value_print_options opts;
419 v = value_field_bitfield (type, i, valaddr, offset, val);
423 common_val_print (v, stream, recurse + 1,
424 &opts, current_language);
429 if (TYPE_FIELD_IGNORE (type, i))
431 fputs_filtered ("<optimized out or zero length>", stream);
433 else if (field_is_static (&TYPE_FIELD (type, i)))
435 struct value *v = value_static_field (type, i);
438 val_print_optimized_out (stream);
441 struct value_print_options opts;
442 struct type *t = check_typedef (value_type (v));
444 if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
448 common_val_print (v, stream, recurse + 1,
449 &opts, current_language);
452 else if (TYPE_FIELD_TYPE (type, i) == NULL)
453 fputs_filtered ("<unknown type>", stream);
456 struct value_print_options opts = *options;
459 val_print (TYPE_FIELD_TYPE (type, i),
461 offset + TYPE_FIELD_BITPOS (type, i) / 8,
462 address, stream, recurse + 1, val, &opts,
466 annotate_field_end ();
471 fprintf_filtered (stream, "\n");
472 print_spaces_filtered (2 * recurse, stream);
475 fprintf_filtered (stream, "}");
478 /* See val_print for a description of the various parameters of this
479 function; they are identical. The semantics of the return value is
480 also identical to val_print. */
483 java_val_print (struct type *type, const gdb_byte *valaddr,
484 int embedded_offset, CORE_ADDR address,
485 struct ui_file *stream, int recurse,
486 const struct value *val,
487 const struct value_print_options *options)
489 struct gdbarch *gdbarch = get_type_arch (type);
490 unsigned int i = 0; /* Number of characters printed. */
491 struct type *target_type;
494 CHECK_TYPEDEF (type);
495 switch (TYPE_CODE (type))
498 if (options->format && options->format != 's')
500 val_print_scalar_formatted (type, valaddr, embedded_offset,
501 val, options, 0, stream);
505 if (options->vtblprint && cp_is_vtbl_ptr_type (type))
507 /* Print the unmangled name if desired. */
508 /* Print vtable entry - we only get here if we ARE using
509 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
510 /* Extract an address, assume that it is unsigned. */
511 print_address_demangle
513 extract_unsigned_integer (valaddr + embedded_offset,
519 addr = unpack_pointer (type, valaddr + embedded_offset);
522 fputs_filtered ("null", stream);
525 target_type = check_typedef (TYPE_TARGET_TYPE (type));
527 if (TYPE_CODE (target_type) == TYPE_CODE_FUNC)
529 /* Try to print what function it points to. */
530 print_address_demangle (gdbarch, addr, stream, demangle);
531 /* Return value is irrelevant except for string pointers. */
535 if (options->addressprint && options->format != 's')
537 fputs_filtered ("@", stream);
538 print_longest (stream, 'x', 0, (ULONGEST) addr);
545 /* Can't just call c_val_print because that prints bytes as C
547 if (options->format || options->output_format)
549 struct value_print_options opts = *options;
551 opts.format = (options->format ? options->format
552 : options->output_format);
553 val_print_scalar_formatted (type, valaddr, embedded_offset,
554 val, &opts, 0, stream);
556 else if (TYPE_CODE (type) == TYPE_CODE_CHAR
557 || (TYPE_CODE (type) == TYPE_CODE_INT
558 && TYPE_LENGTH (type) == 2
559 && strcmp (TYPE_NAME (type), "char") == 0))
560 LA_PRINT_CHAR ((int) unpack_long (type, valaddr + embedded_offset),
563 val_print_type_code_int (type, valaddr + embedded_offset, stream);
566 case TYPE_CODE_STRUCT:
567 java_print_value_fields (type, valaddr, embedded_offset,
568 address, stream, recurse, val, options);
572 return c_val_print (type, valaddr, embedded_offset, address, stream,
573 recurse, val, options);