1 /* Support for printing Java values for GDB, the GNU debugger.
3 Copyright (C) 1997-2014 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "expression.h"
37 java_value_print (struct value *val, struct ui_file *stream,
38 const struct value_print_options *options)
40 struct gdbarch *gdbarch = get_type_arch (value_type (val));
41 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
46 struct value_print_options opts;
48 type = value_type (val);
49 address = value_address (val);
51 if (is_object_type (type))
54 struct value *tem = val;
56 /* Get the run-time type, and cast the object into that. */
57 while (TYPE_CODE (value_type (tem)) == TYPE_CODE_PTR)
58 tem = value_ind (tem);
60 obj_addr = value_address (tem);
64 type = type_from_class (gdbarch, java_class_from_object (val));
65 type = lookup_pointer_type (type);
67 val = value_at (type, address);
68 type = value_type (val);
72 if (TYPE_CODE (type) == TYPE_CODE_PTR && !value_logical_not (val))
73 type_print (TYPE_TARGET_TYPE (type), "", stream, -1);
75 name = TYPE_TAG_NAME (type);
76 if (TYPE_CODE (type) == TYPE_CODE_STRUCT && name != NULL
77 && (i = strlen (name), name[i - 1] == ']'))
81 unsigned int things_printed = 0;
84 = java_primitive_type_from_name (gdbarch, name, i - 2);
87 read_memory (address + get_java_object_header_size (gdbarch), buf4, 4);
89 length = (long) extract_signed_integer (buf4, 4, byte_order);
90 fprintf_filtered (stream, "{length: %ld", length);
95 CORE_ADDR next_element = -1; /* Dummy initial value. */
97 /* Skip object header and length. */
98 address += get_java_object_header_size (gdbarch) + 4;
100 while (i < length && things_printed < options->print_max)
104 buf = alloca (gdbarch_ptr_bit (gdbarch) / HOST_CHAR_BIT);
105 fputs_filtered (", ", stream);
106 wrap_here (n_spaces (2));
109 element = next_element;
112 read_memory (address, buf, sizeof (buf));
113 address += gdbarch_ptr_bit (gdbarch) / HOST_CHAR_BIT;
114 /* FIXME: cagney/2003-05-24: Bogus or what. It
115 pulls a host sized pointer out of the target and
116 then extracts that as an address (while assuming
117 that the address is unsigned)! */
118 element = extract_unsigned_integer (buf, sizeof (buf),
122 for (reps = 1; i + reps < length; reps++)
124 read_memory (address, buf, sizeof (buf));
125 address += gdbarch_ptr_bit (gdbarch) / HOST_CHAR_BIT;
126 /* FIXME: cagney/2003-05-24: Bogus or what. It
127 pulls a host sized pointer out of the target and
128 then extracts that as an address (while assuming
129 that the address is unsigned)! */
130 next_element = extract_unsigned_integer (buf, sizeof (buf),
132 if (next_element != element)
137 fprintf_filtered (stream, "%d: ", i);
139 fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
142 fprintf_filtered (stream, "null");
144 fprintf_filtered (stream, "@%s", paddress (gdbarch, element));
152 struct value *v = allocate_value (el_type);
153 struct value *next_v = allocate_value (el_type);
155 set_value_address (v, (address
156 + get_java_object_header_size (gdbarch) + 4));
157 set_value_address (next_v, value_raw_address (v));
159 while (i < length && things_printed < options->print_max)
161 fputs_filtered (", ", stream);
162 wrap_here (n_spaces (2));
174 set_value_lazy (v, 1);
175 set_value_offset (v, 0);
178 set_value_offset (next_v, value_offset (v));
180 for (reps = 1; i + reps < length; reps++)
182 set_value_lazy (next_v, 1);
183 set_value_offset (next_v, value_offset (next_v)
184 + TYPE_LENGTH (el_type));
185 value_fetch_lazy (next_v);
186 if (!(value_available_contents_eq
187 (v, value_embedded_offset (v),
188 next_v, value_embedded_offset (next_v),
189 TYPE_LENGTH (el_type))))
194 fprintf_filtered (stream, "%d: ", i);
196 fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
200 common_val_print (v, stream, 1, &opts, current_language);
208 fprintf_filtered (stream, "...");
210 fprintf_filtered (stream, "}");
215 /* If it's type String, print it. */
217 if (TYPE_CODE (type) == TYPE_CODE_PTR
218 && TYPE_TARGET_TYPE (type)
219 && TYPE_TAG_NAME (TYPE_TARGET_TYPE (type))
220 && strcmp (TYPE_TAG_NAME (TYPE_TARGET_TYPE (type)),
221 "java.lang.String") == 0
222 && (options->format == 0 || options->format == 's')
224 && value_as_address (val) != 0)
226 struct type *char_type;
227 struct value *data_val;
229 struct value *boffset_val;
230 unsigned long boffset;
231 struct value *count_val;
235 fputs_filtered (" ", stream);
237 mark = value_mark (); /* Remember start of new values. */
239 data_val = value_struct_elt (&val, NULL, "data", NULL, NULL);
240 data = value_as_address (data_val);
242 boffset_val = value_struct_elt (&val, NULL, "boffset", NULL, NULL);
243 boffset = value_as_address (boffset_val);
245 count_val = value_struct_elt (&val, NULL, "count", NULL, NULL);
246 count = value_as_address (count_val);
248 value_free_to_mark (mark); /* Release unnecessary values. */
250 char_type = builtin_java_type (gdbarch)->builtin_char;
251 val_print_string (char_type, NULL, data + boffset, count, stream,
259 common_val_print (val, stream, 0, &opts, current_language);
262 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the
263 same meanings as in cp_print_value and c_val_print.
265 DONT_PRINT is an array of baseclass types that we
266 should not print, or zero if called from top level. */
269 java_print_value_fields (struct type *type, const gdb_byte *valaddr,
271 CORE_ADDR address, struct ui_file *stream,
273 const struct value *val,
274 const struct value_print_options *options)
276 int i, len, n_baseclasses;
278 CHECK_TYPEDEF (type);
280 fprintf_filtered (stream, "{");
281 len = TYPE_NFIELDS (type);
282 n_baseclasses = TYPE_N_BASECLASSES (type);
284 if (n_baseclasses > 0)
286 int i, n_baseclasses = TYPE_N_BASECLASSES (type);
288 for (i = 0; i < n_baseclasses; i++)
291 struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
292 const char *basename = TYPE_NAME (baseclass);
293 const gdb_byte *base_valaddr;
295 if (BASETYPE_VIA_VIRTUAL (type, i))
298 if (basename != NULL && strcmp (basename, "java.lang.Object") == 0)
303 if (options->prettyformat)
305 fprintf_filtered (stream, "\n");
306 print_spaces_filtered (2 * (recurse + 1), stream);
308 fputs_filtered ("<", stream);
309 /* Not sure what the best notation is in the case where there is no
311 fputs_filtered (basename ? basename : "", stream);
312 fputs_filtered ("> = ", stream);
314 base_valaddr = valaddr;
316 java_print_value_fields (baseclass, base_valaddr,
317 offset + boffset, address,
318 stream, recurse + 1, val, options);
319 fputs_filtered (", ", stream);
323 if (!len && n_baseclasses == 1)
324 fprintf_filtered (stream, "<No data fields>");
329 for (i = n_baseclasses; i < len; i++)
331 /* If requested, skip printing of static fields. */
332 if (field_is_static (&TYPE_FIELD (type, i)))
334 const char *name = TYPE_FIELD_NAME (type, i);
336 if (!options->static_field_print)
338 if (name != NULL && strcmp (name, "class") == 0)
342 fprintf_filtered (stream, ", ");
343 else if (n_baseclasses > 0)
345 if (options->prettyformat)
347 fprintf_filtered (stream, "\n");
348 print_spaces_filtered (2 + 2 * recurse, stream);
349 fputs_filtered ("members of ", stream);
350 fputs_filtered (type_name_no_tag (type), stream);
351 fputs_filtered (": ", stream);
356 if (options->prettyformat)
358 fprintf_filtered (stream, "\n");
359 print_spaces_filtered (2 + 2 * recurse, stream);
363 wrap_here (n_spaces (2 + 2 * recurse));
366 annotate_field_begin (TYPE_FIELD_TYPE (type, i));
368 if (field_is_static (&TYPE_FIELD (type, i)))
369 fputs_filtered ("static ", stream);
370 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
372 DMGL_PARAMS | DMGL_ANSI);
373 annotate_field_name_end ();
374 fputs_filtered (": ", stream);
375 annotate_field_value ();
377 if (!field_is_static (&TYPE_FIELD (type, i))
378 && TYPE_FIELD_PACKED (type, i))
382 /* Bitfields require special handling, especially due to byte
384 if (TYPE_FIELD_IGNORE (type, i))
386 fputs_filtered ("<optimized out or zero length>", stream);
388 else if (value_bits_synthetic_pointer (val,
389 TYPE_FIELD_BITPOS (type,
391 TYPE_FIELD_BITSIZE (type,
394 fputs_filtered (_("<synthetic pointer>"), stream);
396 else if (!value_bits_valid (val, TYPE_FIELD_BITPOS (type, i),
397 TYPE_FIELD_BITSIZE (type, i)))
399 val_print_optimized_out (val, stream);
403 struct value_print_options opts;
405 v = value_field_bitfield (type, i, valaddr, offset, val);
409 common_val_print (v, stream, recurse + 1,
410 &opts, current_language);
415 if (TYPE_FIELD_IGNORE (type, i))
417 fputs_filtered ("<optimized out or zero length>", stream);
419 else if (field_is_static (&TYPE_FIELD (type, i)))
421 struct value_print_options opts;
422 struct value *v = value_static_field (type, i);
423 struct type *t = check_typedef (value_type (v));
425 if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
429 common_val_print (v, stream, recurse + 1,
430 &opts, current_language);
432 else if (TYPE_FIELD_TYPE (type, i) == NULL)
433 fputs_filtered ("<unknown type>", stream);
436 struct value_print_options opts = *options;
439 val_print (TYPE_FIELD_TYPE (type, i),
441 offset + TYPE_FIELD_BITPOS (type, i) / 8,
442 address, stream, recurse + 1, val, &opts,
446 annotate_field_end ();
449 if (options->prettyformat)
451 fprintf_filtered (stream, "\n");
452 print_spaces_filtered (2 * recurse, stream);
455 fprintf_filtered (stream, "}");
458 /* See val_print for a description of the various parameters of this
459 function; they are identical. */
462 java_val_print (struct type *type, const gdb_byte *valaddr,
463 int embedded_offset, CORE_ADDR address,
464 struct ui_file *stream, int recurse,
465 const struct value *val,
466 const struct value_print_options *options)
468 struct gdbarch *gdbarch = get_type_arch (type);
469 struct type *target_type;
472 CHECK_TYPEDEF (type);
473 switch (TYPE_CODE (type))
476 if (options->format && options->format != 's')
478 val_print_scalar_formatted (type, valaddr, embedded_offset,
479 val, options, 0, stream);
482 addr = unpack_pointer (type, valaddr + embedded_offset);
485 fputs_filtered ("null", stream);
488 target_type = check_typedef (TYPE_TARGET_TYPE (type));
490 if (TYPE_CODE (target_type) == TYPE_CODE_FUNC)
492 /* Try to print what function it points to. */
493 print_address_demangle (options, gdbarch, addr, stream, demangle);
497 if (options->addressprint && options->format != 's')
499 fputs_filtered ("@", stream);
500 print_longest (stream, 'x', 0, (ULONGEST) addr);
507 /* Can't just call c_val_print because that prints bytes as C
509 if (options->format || options->output_format)
511 struct value_print_options opts = *options;
513 opts.format = (options->format ? options->format
514 : options->output_format);
515 val_print_scalar_formatted (type, valaddr, embedded_offset,
516 val, &opts, 0, stream);
518 else if (TYPE_CODE (type) == TYPE_CODE_CHAR
519 || (TYPE_CODE (type) == TYPE_CODE_INT
520 && TYPE_LENGTH (type) == 2
521 && strcmp (TYPE_NAME (type), "char") == 0))
522 LA_PRINT_CHAR ((int) unpack_long (type, valaddr + embedded_offset),
525 val_print_type_code_int (type, valaddr + embedded_offset, stream);
528 case TYPE_CODE_STRUCT:
529 java_print_value_fields (type, valaddr, embedded_offset,
530 address, stream, recurse, val, options);
534 c_val_print (type, valaddr, embedded_offset, address, stream,
535 recurse, val, options);