1 /* Support for printing Java values for GDB, the GNU debugger.
2 Copyright 1997-2000 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
25 #include "expression.h"
36 static void java_print_value_fields (struct type * type, char *valaddr,
38 struct ui_file *stream, int format,
40 enum val_prettyprint pretty);
44 java_value_print (value_ptr val, struct ui_file *stream, int format,
45 enum val_prettyprint pretty)
52 type = VALUE_TYPE (val);
53 address = VALUE_ADDRESS (val) + VALUE_OFFSET (val);
55 if (is_object_type (type))
59 /* Get the run-time type, and cast the object into that */
61 obj_addr = unpack_pointer (type, VALUE_CONTENTS (val));
65 type = type_from_class (java_class_from_object (val));
66 type = lookup_pointer_type (type);
68 val = value_at (type, address, NULL);
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;
83 struct type *el_type = java_primitive_type_from_name (name, i - 2);
86 read_memory (address + JAVA_OBJECT_SIZE, buf4, 4);
88 length = (long) extract_signed_integer (buf4, 4);
89 fprintf_filtered (stream, "{length: %ld", length);
93 CORE_ADDR element, next_element;
95 address += JAVA_OBJECT_SIZE + 4; /* Skip object header and length. */
97 while (i < length && things_printed < print_max)
101 buf = alloca (TARGET_PTR_BIT / 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 += TARGET_PTR_BIT / HOST_CHAR_BIT;
111 element = extract_address (buf, sizeof (buf));
114 for (reps = 1; i + reps < length; reps++)
116 read_memory (address, buf, sizeof (buf));
117 address += TARGET_PTR_BIT / HOST_CHAR_BIT;
118 next_element = extract_address (buf, sizeof (buf));
119 if (next_element != element)
124 fprintf_filtered (stream, "%d: ", i);
126 fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
129 fprintf_filtered (stream, "null");
131 fprintf_filtered (stream, "@%s", paddr_nz (element));
139 value_ptr v = allocate_value (el_type);
140 value_ptr next_v = allocate_value (el_type);
142 VALUE_ADDRESS (v) = address + JAVA_OBJECT_SIZE + 4;
143 VALUE_ADDRESS (next_v) = VALUE_ADDRESS (v);
145 while (i < length && things_printed < print_max)
147 fputs_filtered (", ", stream);
148 wrap_here (n_spaces (2));
161 VALUE_OFFSET (v) = 0;
164 VALUE_OFFSET (next_v) = VALUE_OFFSET (v);
166 for (reps = 1; i + reps < length; reps++)
168 VALUE_LAZY (next_v) = 1;
169 VALUE_OFFSET (next_v) += TYPE_LENGTH (el_type);
170 if (memcmp (VALUE_CONTENTS (v), VALUE_CONTENTS (next_v),
171 TYPE_LENGTH (el_type)) != 0)
176 fprintf_filtered (stream, "%d: ", i);
178 fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
180 val_print (VALUE_TYPE (v), VALUE_CONTENTS (v), 0, 0,
181 stream, format, 2, 1, pretty);
189 fprintf_filtered (stream, "...");
191 fprintf_filtered (stream, "}");
196 /* If it's type String, print it */
198 if (TYPE_CODE (type) == TYPE_CODE_PTR
199 && TYPE_TARGET_TYPE (type)
200 && TYPE_NAME (TYPE_TARGET_TYPE (type))
201 && strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type)), "java.lang.String") == 0
202 && (format == 0 || format == 's')
204 && value_as_pointer (val) != 0)
208 value_ptr boffset_val;
209 unsigned long boffset;
214 mark = value_mark (); /* Remember start of new values */
216 data_val = value_struct_elt (&val, NULL, "data", NULL, NULL);
217 data = value_as_pointer (data_val);
219 boffset_val = value_struct_elt (&val, NULL, "boffset", NULL, NULL);
220 boffset = value_as_pointer (boffset_val);
222 count_val = value_struct_elt (&val, NULL, "count", NULL, NULL);
223 count = value_as_pointer (count_val);
225 value_free_to_mark (mark); /* Release unnecessary values */
227 val_print_string (data + boffset, count, 2, stream);
232 return (val_print (type, VALUE_CONTENTS (val), 0, address,
233 stream, format, 1, 0, pretty));
236 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
237 same meanings as in cp_print_value and c_val_print.
239 DONT_PRINT is an array of baseclass types that we
240 should not print, or zero if called from top level. */
243 java_print_value_fields (struct type *type, char *valaddr, CORE_ADDR address,
244 struct ui_file *stream, int format, int recurse,
245 enum val_prettyprint pretty)
247 int i, len, n_baseclasses;
249 CHECK_TYPEDEF (type);
251 fprintf_filtered (stream, "{");
252 len = TYPE_NFIELDS (type);
253 n_baseclasses = TYPE_N_BASECLASSES (type);
255 if (n_baseclasses > 0)
257 int i, n_baseclasses = TYPE_N_BASECLASSES (type);
259 for (i = 0; i < n_baseclasses; i++)
262 struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
263 char *basename = TYPE_NAME (baseclass);
266 if (BASETYPE_VIA_VIRTUAL (type, i))
269 if (basename != NULL && strcmp (basename, "java.lang.Object") == 0)
276 fprintf_filtered (stream, "\n");
277 print_spaces_filtered (2 * (recurse + 1), stream);
279 fputs_filtered ("<", stream);
280 /* Not sure what the best notation is in the case where there is no
282 fputs_filtered (basename ? basename : "", stream);
283 fputs_filtered ("> = ", stream);
285 base_valaddr = valaddr;
287 java_print_value_fields (baseclass, base_valaddr, address + boffset,
288 stream, format, recurse + 1, pretty);
289 fputs_filtered (", ", stream);
297 if (!len && n_baseclasses == 1)
298 fprintf_filtered (stream, "<No data fields>");
301 extern int inspect_it;
304 for (i = n_baseclasses; i < len; i++)
306 /* If requested, skip printing of static fields. */
307 if (TYPE_FIELD_STATIC (type, i))
309 char *name = TYPE_FIELD_NAME (type, i);
310 if (!static_field_print)
312 if (name != NULL && strcmp (name, "class") == 0)
316 fprintf_filtered (stream, ", ");
317 else if (n_baseclasses > 0)
321 fprintf_filtered (stream, "\n");
322 print_spaces_filtered (2 + 2 * recurse, stream);
323 fputs_filtered ("members of ", stream);
324 fputs_filtered (type_name_no_tag (type), stream);
325 fputs_filtered (": ", stream);
332 fprintf_filtered (stream, "\n");
333 print_spaces_filtered (2 + 2 * recurse, stream);
337 wrap_here (n_spaces (2 + 2 * recurse));
341 if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
342 fputs_filtered ("\"( ptr \"", stream);
344 fputs_filtered ("\"( nodef \"", stream);
345 if (TYPE_FIELD_STATIC (type, i))
346 fputs_filtered ("static ", stream);
347 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
349 DMGL_PARAMS | DMGL_ANSI);
350 fputs_filtered ("\" \"", stream);
351 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
353 DMGL_PARAMS | DMGL_ANSI);
354 fputs_filtered ("\") \"", stream);
358 annotate_field_begin (TYPE_FIELD_TYPE (type, i));
360 if (TYPE_FIELD_STATIC (type, i))
361 fputs_filtered ("static ", stream);
362 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
364 DMGL_PARAMS | DMGL_ANSI);
365 annotate_field_name_end ();
366 fputs_filtered (": ", stream);
367 annotate_field_value ();
370 if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))
374 /* Bitfields require special handling, especially due to byte
376 if (TYPE_FIELD_IGNORE (type, i))
378 fputs_filtered ("<optimized out or zero length>", stream);
382 v = value_from_longest (TYPE_FIELD_TYPE (type, i),
383 unpack_field_as_long (type, valaddr, i));
385 val_print (TYPE_FIELD_TYPE (type, i), VALUE_CONTENTS (v), 0,
386 0, stream, format, 0, recurse + 1, pretty);
391 if (TYPE_FIELD_IGNORE (type, i))
393 fputs_filtered ("<optimized out or zero length>", stream);
395 else if (TYPE_FIELD_STATIC (type, i))
397 value_ptr v = value_static_field (type, i);
399 fputs_filtered ("<optimized out>", stream);
402 struct type *t = check_typedef (VALUE_TYPE (v));
403 if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
405 val_print (VALUE_TYPE (v),
406 VALUE_CONTENTS (v), 0, VALUE_ADDRESS (v),
407 stream, format, 0, recurse + 1, pretty);
410 else if (TYPE_FIELD_TYPE (type, i) == NULL)
411 fputs_filtered ("<unknown type>", stream);
414 val_print (TYPE_FIELD_TYPE (type, i),
415 valaddr + TYPE_FIELD_BITPOS (type, i) / 8, 0,
416 address + TYPE_FIELD_BITPOS (type, i) / 8,
417 stream, format, 0, recurse + 1, pretty);
420 annotate_field_end ();
425 fprintf_filtered (stream, "\n");
426 print_spaces_filtered (2 * recurse, stream);
429 fprintf_filtered (stream, "}");
432 /* Print data of type TYPE located at VALADDR (within GDB), which came from
433 the inferior at address ADDRESS, onto stdio stream STREAM according to
434 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
437 If the data are a string pointer, returns the number of string characters
440 If DEREF_REF is nonzero, then dereference references, otherwise just print
443 The PRETTY parameter controls prettyprinting. */
446 java_val_print (struct type *type, char *valaddr, int embedded_offset,
447 CORE_ADDR address, struct ui_file *stream, int format,
448 int deref_ref, int recurse, enum val_prettyprint pretty)
450 register unsigned int i = 0; /* Number of characters printed */
451 struct type *target_type;
454 CHECK_TYPEDEF (type);
455 switch (TYPE_CODE (type))
458 if (format && format != 's')
460 print_scalar_formatted (valaddr, type, format, 0, stream);
464 if (vtblprint && cp_is_vtbl_ptr_type (type))
466 /* Print the unmangled name if desired. */
467 /* Print vtable entry - we only get here if we ARE using
468 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
469 print_address_demangle (extract_address (valaddr, TYPE_LENGTH (type)),
474 addr = unpack_pointer (type, valaddr);
477 fputs_filtered ("null", stream);
480 target_type = check_typedef (TYPE_TARGET_TYPE (type));
482 if (TYPE_CODE (target_type) == TYPE_CODE_FUNC)
484 /* Try to print what function it points to. */
485 print_address_demangle (addr, stream, demangle);
486 /* Return value is irrelevant except for string pointers. */
490 if (addressprint && format != 's')
492 fputs_filtered ("@", stream);
493 print_longest (stream, 'x', 0, (ULONGEST) addr);
499 format = format ? format : output_format;
501 print_scalar_formatted (valaddr, type, format, 0, stream);
503 LA_PRINT_CHAR ((int) unpack_long (type, valaddr), stream);
507 /* Can't just call c_val_print because that print bytes as C chars. */
508 format = format ? format : output_format;
510 print_scalar_formatted (valaddr, type, format, 0, stream);
512 val_print_type_code_int (type, valaddr, stream);
515 case TYPE_CODE_STRUCT:
516 java_print_value_fields (type, valaddr, address, stream, format,
521 return c_val_print (type, valaddr, embedded_offset, address, stream,
522 format, deref_ref, recurse, pretty);