1 /* Support for printing Java values for GDB, the GNU debugger.
2 Copyright 1997 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, Boston, MA 02111-1307, USA. */
23 #include "expression.h"
32 java_value_print (val, stream, format, pretty)
36 enum val_prettyprint pretty;
38 struct type *type = VALUE_TYPE (val);
39 CORE_ADDR address = VALUE_ADDRESS (val) + VALUE_OFFSET (val);
40 if (is_object_type (type))
42 CORE_ADDR obj_addr = unpack_pointer (type, VALUE_CONTENTS (val));
46 = value_at (TYPE_TARGET_TYPE (type), obj_addr, NULL);
47 type = type_from_class (java_class_from_object (obj_val));
48 type = lookup_pointer_type (type);
51 if (TYPE_CODE (type) == TYPE_CODE_PTR && ! value_logical_not (val))
53 type_print (TYPE_TARGET_TYPE (type), "", stream, -1);
56 if (TYPE_CODE (type) == TYPE_CODE_STRUCT && TYPE_TAG_NAME (type) != NULL
57 && TYPE_TAG_NAME (type)[0] == '[')
61 unsigned int things_printed = 0;
64 read_memory (address + JAVA_OBJECT_SIZE, buf4, 4);
65 length = (long) extract_signed_integer (buf4, 4);
66 fprintf_filtered (stream, "{length: %ld", length);
67 if (TYPE_TAG_NAME (type)[1] == 'L'
68 || TYPE_TAG_NAME (type)[1] == '[')
70 CORE_ADDR element, next_element;
71 address += JAVA_OBJECT_SIZE + 4; /* Skip object header and length. */
72 while (i < length && things_printed < print_max)
74 char buf[TARGET_PTR_BIT / HOST_CHAR_BIT];
75 fputs_filtered (", ", stream);
76 wrap_here (n_spaces (2));
78 element = next_element;
81 read_memory (address, buf, sizeof(buf));
82 address += TARGET_PTR_BIT / HOST_CHAR_BIT;
83 element = extract_address (buf, sizeof(buf));
85 for (reps = 1; i + reps < length; reps++)
87 read_memory (address, buf, sizeof(buf));
88 address += TARGET_PTR_BIT / HOST_CHAR_BIT;
89 next_element = extract_address (buf, sizeof(buf));
90 if (next_element != element)
94 fprintf_filtered (stream, "%d: ", i);
96 fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
98 fprintf_filtered (stream, "null");
100 fprintf_filtered (stream, "@%x", element);
107 struct type *el_type = java_primitive_type (TYPE_TAG_NAME (type)[1]);
108 value_ptr v = allocate_value (el_type);
109 value_ptr next_v = allocate_value (el_type);
110 VALUE_ADDRESS (v) = address + JAVA_OBJECT_SIZE + 4;
111 VALUE_ADDRESS (next_v) = VALUE_ADDRESS (v);
113 while (i < length && things_printed < print_max)
115 fputs_filtered (", ", stream);
116 wrap_here (n_spaces (2));
119 value_ptr tmp = next_v; next_v = v; v = tmp;
124 VALUE_OFFSET (v) = 0;
126 VALUE_OFFSET (next_v) = VALUE_OFFSET (v);
127 for (reps = 1; i + reps < length; reps++)
129 VALUE_LAZY (next_v) = 1;
130 VALUE_OFFSET (next_v) += TYPE_LENGTH (el_type);
131 if (memcmp (VALUE_CONTENTS (v), VALUE_CONTENTS (next_v),
132 TYPE_LENGTH (el_type)) != 0)
136 fprintf_filtered (stream, "%d: ", i);
138 fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
139 val_print (VALUE_TYPE (v), VALUE_CONTENTS (v), 0,
140 stream, format, 2, 1, pretty);
147 fprintf_filtered (stream, "...");
148 fprintf_filtered (stream, "}");
152 /* If it's type String, print it */
154 if (TYPE_CODE (type) == TYPE_CODE_PTR
155 && TYPE_TARGET_TYPE (type)
156 && TYPE_NAME (TYPE_TARGET_TYPE (type))
157 && strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type)), "java.lang.String") == 0
158 && (format == 0 || format == 's')
163 value_ptr boffset_val;
164 unsigned long boffset;
169 mark = value_mark (); /* Remember start of new values */
171 data_val = value_struct_elt (&val, NULL, "data", NULL, NULL);
172 data = value_as_pointer (data_val);
174 boffset_val = value_struct_elt (&val, NULL, "boffset", NULL, NULL);
175 boffset = value_as_pointer (boffset_val);
177 count_val = value_struct_elt (&val, NULL, "count", NULL, NULL);
178 count = value_as_pointer (count_val);
180 value_free_to_mark (mark); /* Release unnecessary values */
182 val_print_string (data + boffset, count, 2, stream);
187 return (val_print (type, VALUE_CONTENTS (val), address,
188 stream, format, 1, 0, pretty));
191 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
192 same meanings as in cp_print_value and c_val_print.
194 DONT_PRINT is an array of baseclass types that we
195 should not print, or zero if called from top level. */
198 java_print_value_fields (type, valaddr, address, stream,
199 format, recurse, pretty)
206 enum val_prettyprint pretty;
208 int i, len, n_baseclasses;
210 CHECK_TYPEDEF (type);
212 fprintf_filtered (stream, "{");
213 len = TYPE_NFIELDS (type);
214 n_baseclasses = TYPE_N_BASECLASSES (type);
216 if (n_baseclasses > 0)
218 int i, n_baseclasses = TYPE_N_BASECLASSES (type);
220 for (i = 0; i < n_baseclasses; i++)
223 struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
224 char *basename = TYPE_NAME (baseclass);
227 if (BASETYPE_VIA_VIRTUAL (type, i))
230 if (basename != NULL && strcmp (basename, "java.lang.Object") == 0)
237 fprintf_filtered (stream, "\n");
238 print_spaces_filtered (2 * (recurse+1), stream);
240 fputs_filtered ("<", stream);
241 /* Not sure what the best notation is in the case where there is no
243 fputs_filtered (basename ? basename : "", stream);
244 fputs_filtered ("> = ", stream);
246 base_valaddr = valaddr;
248 java_print_value_fields (baseclass, base_valaddr, address + boffset,
249 stream, format, recurse+1, pretty);
250 fputs_filtered (", ", stream);
258 if (!len && n_baseclasses == 1)
259 fprintf_filtered (stream, "<No data fields>");
262 extern int inspect_it;
265 for (i = n_baseclasses; i < len; i++)
267 /* If requested, skip printing of static fields. */
268 if (TYPE_FIELD_STATIC (type, i))
270 char *name = TYPE_FIELD_NAME (type, i);
271 if (!static_field_print)
273 if (name != NULL && strcmp (name, "class") == 0)
277 fprintf_filtered (stream, ", ");
278 else if (n_baseclasses > 0)
282 fprintf_filtered (stream, "\n");
283 print_spaces_filtered (2 + 2 * recurse, stream);
284 fputs_filtered ("members of ", stream);
285 fputs_filtered (type_name_no_tag (type), stream);
286 fputs_filtered (": ", stream);
293 fprintf_filtered (stream, "\n");
294 print_spaces_filtered (2 + 2 * recurse, stream);
298 wrap_here (n_spaces (2 + 2 * recurse));
302 if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
303 fputs_filtered ("\"( ptr \"", stream);
305 fputs_filtered ("\"( nodef \"", stream);
306 if (TYPE_FIELD_STATIC (type, i))
307 fputs_filtered ("static ", stream);
308 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
310 DMGL_PARAMS | DMGL_ANSI);
311 fputs_filtered ("\" \"", stream);
312 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
314 DMGL_PARAMS | DMGL_ANSI);
315 fputs_filtered ("\") \"", stream);
319 annotate_field_begin (TYPE_FIELD_TYPE (type, i));
321 if (TYPE_FIELD_STATIC (type, i))
322 fputs_filtered ("static ", stream);
323 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
325 DMGL_PARAMS | DMGL_ANSI);
326 annotate_field_name_end ();
327 fputs_filtered (": ", stream);
328 annotate_field_value ();
331 if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))
335 /* Bitfields require special handling, especially due to byte
337 if (TYPE_FIELD_IGNORE (type, i))
339 fputs_filtered ("<optimized out or zero length>", stream);
343 v = value_from_longest (TYPE_FIELD_TYPE (type, i),
344 unpack_field_as_long (type, valaddr, i));
346 val_print (TYPE_FIELD_TYPE(type, i), VALUE_CONTENTS (v), 0,
347 stream, format, 0, recurse + 1, pretty);
352 if (TYPE_FIELD_IGNORE (type, i))
354 fputs_filtered ("<optimized out or zero length>", stream);
356 else if (TYPE_FIELD_STATIC (type, i))
358 value_ptr v = value_static_field (type, i);
360 fputs_filtered ("<optimized out>", stream);
363 struct type *t = check_typedef (VALUE_TYPE (v));
364 if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
366 val_print (VALUE_TYPE (v),
367 VALUE_CONTENTS (v), VALUE_ADDRESS (v),
368 stream, format, 0, recurse+1, pretty);
373 val_print (TYPE_FIELD_TYPE (type, i),
374 valaddr + TYPE_FIELD_BITPOS (type, i) / 8,
375 address + TYPE_FIELD_BITPOS (type, i) / 8,
376 stream, format, 0, recurse + 1, pretty);
379 annotate_field_end ();
384 fprintf_filtered (stream, "\n");
385 print_spaces_filtered (2 * recurse, stream);
388 fprintf_filtered (stream, "}");
391 /* Print data of type TYPE located at VALADDR (within GDB), which came from
392 the inferior at address ADDRESS, onto stdio stream STREAM according to
393 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
396 If the data are a string pointer, returns the number of string characters
399 If DEREF_REF is nonzero, then dereference references, otherwise just print
402 The PRETTY parameter controls prettyprinting. */
405 java_val_print (type, valaddr, address, stream, format, deref_ref, recurse,
414 enum val_prettyprint pretty;
416 register unsigned int i = 0; /* Number of characters printed */
417 struct type *target_type;
420 CHECK_TYPEDEF (type);
421 switch (TYPE_CODE (type))
424 if (format && format != 's')
426 print_scalar_formatted (valaddr, type, format, 0, stream);
430 if (vtblprint && cp_is_vtbl_ptr_type(type))
432 /* Print the unmangled name if desired. */
433 /* Print vtable entry - we only get here if we ARE using
434 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
435 print_address_demangle(extract_address (valaddr, TYPE_LENGTH (type)),
440 addr = unpack_pointer (type, valaddr);
443 fputs_filtered ("null", stream);
446 target_type = check_typedef (TYPE_TARGET_TYPE (type));
448 if (TYPE_CODE (target_type) == TYPE_CODE_FUNC)
450 /* Try to print what function it points to. */
451 print_address_demangle (addr, stream, demangle);
452 /* Return value is irrelevant except for string pointers. */
456 if (addressprint && format != 's')
458 fputs_filtered ("@", stream);
459 print_longest (stream, 'x', 0, (ULONGEST) addr);
464 format = format ? format : output_format;
467 print_scalar_formatted (valaddr, type, format, 0, stream);
471 LA_PRINT_CHAR ((int) unpack_long (type, valaddr), stream);
474 case TYPE_CODE_STRUCT:
475 java_print_value_fields (type, valaddr, address, stream, format,
479 return c_val_print (type, valaddr, address, stream, format,
480 deref_ref, recurse, pretty);