hp merge changes -- too numerous to mention here; see ChangeLog and
[deliverable/binutils-gdb.git] / gdb / jv-valprint.c
CommitLineData
7a9eb4c4
PB
1/* Support for printing Java values for GDB, the GNU debugger.
2 Copyright 1997 Free Software Foundation, Inc.
3
4This file is part of GDB.
5
6This program is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2 of the License, or
9(at your option) any later version.
10
11This program is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with this program; if not, write to the Free Software
18Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19
20#include "defs.h"
21#include "symtab.h"
22#include "gdbtypes.h"
23#include "expression.h"
24#include "value.h"
25#include "demangle.h"
26#include "valprint.h"
27#include "language.h"
166606b7 28#include "jv-lang.h"
40b647e9 29#include "c-lang.h"
7a9eb4c4
PB
30
31int
32java_value_print (val, stream, format, pretty)
33 value_ptr val;
34 GDB_FILE *stream;
35 int format;
36 enum val_prettyprint pretty;
37{
38 struct type *type = VALUE_TYPE (val);
fc655dc2
PB
39 CORE_ADDR address = VALUE_ADDRESS (val) + VALUE_OFFSET (val);
40 if (is_object_type (type))
41 {
42 CORE_ADDR obj_addr = unpack_pointer (type, VALUE_CONTENTS (val));
43 if (obj_addr != 0)
44 {
45 value_ptr obj_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);
49 }
50 }
51 if (TYPE_CODE (type) == TYPE_CODE_PTR && ! value_logical_not (val))
7a9eb4c4 52 {
7a9eb4c4 53 type_print (TYPE_TARGET_TYPE (type), "", stream, -1);
7a9eb4c4 54 }
fc655dc2
PB
55
56 if (TYPE_CODE (type) == TYPE_CODE_STRUCT && TYPE_TAG_NAME (type) != NULL
57 && TYPE_TAG_NAME (type)[0] == '[')
58 {
8d2755a9
PB
59 char buf4[4];
60 long length;
61 unsigned int things_printed = 0;
62 int i = 0;
63 int reps;
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] == '[')
69 {
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)
73 {
74 char buf[TARGET_PTR_BIT / HOST_CHAR_BIT];
75 fputs_filtered (", ", stream);
76 wrap_here (n_spaces (2));
77 if (i > 0)
78 element = next_element;
79 else
80 {
81 read_memory (address, buf, sizeof(buf));
82 address += TARGET_PTR_BIT / HOST_CHAR_BIT;
83 element = extract_address (buf, sizeof(buf));
84 }
85 for (reps = 1; i + reps < length; reps++)
86 {
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)
91 break;
92 }
93 if (reps == 1)
94 fprintf_filtered (stream, "%d: ", i);
95 else
96 fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
97 if (element == 0)
98 fprintf_filtered (stream, "null");
99 else
100 fprintf_filtered (stream, "@%x", element);
101 things_printed++;
102 i += reps;
103 }
104 }
105 else
106 {
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);
112
113 while (i < length && things_printed < print_max)
114 {
115 fputs_filtered (", ", stream);
116 wrap_here (n_spaces (2));
117 if (i > 0)
118 {
119 value_ptr tmp = next_v; next_v = v; v = tmp;
120 }
121 else
122 {
123 VALUE_LAZY (v) = 1;
124 VALUE_OFFSET (v) = 0;
125 }
126 VALUE_OFFSET (next_v) = VALUE_OFFSET (v);
127 for (reps = 1; i + reps < length; reps++)
128 {
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)
133 break;
134 }
135 if (reps == 1)
136 fprintf_filtered (stream, "%d: ", i);
137 else
138 fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
4ef1f467
DT
139 val_print (VALUE_TYPE (v), VALUE_CONTENTS (v), 0, 0,
140 stream, format, 2, 1, pretty);
8d2755a9
PB
141 things_printed++;
142 i += reps;
143 }
144 }
145
146 if (i < length)
147 fprintf_filtered (stream, "...");
fc655dc2
PB
148 fprintf_filtered (stream, "}");
149 return 0;
150 }
151
242c0d81
SG
152 /* If it's type String, print it */
153
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')
159 && address != 0)
160 {
161 value_ptr data_val;
162 CORE_ADDR data;
163 value_ptr boffset_val;
164 unsigned long boffset;
165 value_ptr count_val;
166 unsigned long count;
167 value_ptr mark;
168
169 mark = value_mark (); /* Remember start of new values */
170
171 data_val = value_struct_elt (&val, NULL, "data", NULL, NULL);
172 data = value_as_pointer (data_val);
173
174 boffset_val = value_struct_elt (&val, NULL, "boffset", NULL, NULL);
175 boffset = value_as_pointer (boffset_val);
176
177 count_val = value_struct_elt (&val, NULL, "count", NULL, NULL);
178 count = value_as_pointer (count_val);
179
180 value_free_to_mark (mark); /* Release unnecessary values */
181
182 val_print_string (data + boffset, count, 2, stream);
183
184 return 0;
185 }
186
4ef1f467 187 return (val_print (type, VALUE_CONTENTS (val), 0, address,
7a9eb4c4
PB
188 stream, format, 1, 0, pretty));
189}
190
8d2755a9
PB
191/* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
192 same meanings as in cp_print_value and c_val_print.
193
194 DONT_PRINT is an array of baseclass types that we
195 should not print, or zero if called from top level. */
196
197void
198java_print_value_fields (type, valaddr, address, stream,
199 format, recurse, pretty)
200 struct type *type;
201 char *valaddr;
202 CORE_ADDR address;
203 GDB_FILE *stream;
204 int format;
205 int recurse;
206 enum val_prettyprint pretty;
207{
208 int i, len, n_baseclasses;
209
210 CHECK_TYPEDEF (type);
211
212 fprintf_filtered (stream, "{");
213 len = TYPE_NFIELDS (type);
214 n_baseclasses = TYPE_N_BASECLASSES (type);
215
216 if (n_baseclasses > 0)
217 {
218 int i, n_baseclasses = TYPE_N_BASECLASSES (type);
219
220 for (i = 0; i < n_baseclasses; i++)
221 {
222 int boffset;
223 struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
224 char *basename = TYPE_NAME (baseclass);
225 char *base_valaddr;
226
227 if (BASETYPE_VIA_VIRTUAL (type, i))
228 continue;
229
230 if (basename != NULL && strcmp (basename, "java.lang.Object") == 0)
231 continue;
232
233 boffset = 0;
234
235 if (pretty)
236 {
237 fprintf_filtered (stream, "\n");
238 print_spaces_filtered (2 * (recurse+1), stream);
239 }
240 fputs_filtered ("<", stream);
241 /* Not sure what the best notation is in the case where there is no
242 baseclass name. */
243 fputs_filtered (basename ? basename : "", stream);
244 fputs_filtered ("> = ", stream);
245
246 base_valaddr = valaddr;
247
248 java_print_value_fields (baseclass, base_valaddr, address + boffset,
249 stream, format, recurse+1, pretty);
250 fputs_filtered (", ", stream);
251
252 flush_it:
253 ;
254 }
255
256 }
257
258 if (!len && n_baseclasses == 1)
259 fprintf_filtered (stream, "<No data fields>");
260 else
261 {
262 extern int inspect_it;
263 int fields_seen = 0;
264
265 for (i = n_baseclasses; i < len; i++)
266 {
267 /* If requested, skip printing of static fields. */
268 if (TYPE_FIELD_STATIC (type, i))
269 {
270 char *name = TYPE_FIELD_NAME (type, i);
271 if (!static_field_print)
272 continue;
273 if (name != NULL && strcmp (name, "class") == 0)
274 continue;
275 }
276 if (fields_seen)
277 fprintf_filtered (stream, ", ");
278 else if (n_baseclasses > 0)
279 {
280 if (pretty)
281 {
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);
287 }
288 }
289 fields_seen = 1;
290
291 if (pretty)
292 {
293 fprintf_filtered (stream, "\n");
294 print_spaces_filtered (2 + 2 * recurse, stream);
295 }
296 else
297 {
298 wrap_here (n_spaces (2 + 2 * recurse));
299 }
300 if (inspect_it)
301 {
302 if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
303 fputs_filtered ("\"( ptr \"", stream);
304 else
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),
309 language_cplus,
310 DMGL_PARAMS | DMGL_ANSI);
311 fputs_filtered ("\" \"", stream);
312 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
313 language_cplus,
314 DMGL_PARAMS | DMGL_ANSI);
315 fputs_filtered ("\") \"", stream);
316 }
317 else
318 {
319 annotate_field_begin (TYPE_FIELD_TYPE (type, i));
320
321 if (TYPE_FIELD_STATIC (type, i))
322 fputs_filtered ("static ", stream);
323 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
324 language_cplus,
325 DMGL_PARAMS | DMGL_ANSI);
326 annotate_field_name_end ();
327 fputs_filtered (": ", stream);
328 annotate_field_value ();
329 }
330
331 if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))
332 {
333 value_ptr v;
334
335 /* Bitfields require special handling, especially due to byte
336 order problems. */
337 if (TYPE_FIELD_IGNORE (type, i))
338 {
339 fputs_filtered ("<optimized out or zero length>", stream);
340 }
341 else
342 {
343 v = value_from_longest (TYPE_FIELD_TYPE (type, i),
344 unpack_field_as_long (type, valaddr, i));
345
4ef1f467
DT
346 val_print (TYPE_FIELD_TYPE(type, i), VALUE_CONTENTS (v),
347 0, 0,
8d2755a9
PB
348 stream, format, 0, recurse + 1, pretty);
349 }
350 }
351 else
352 {
353 if (TYPE_FIELD_IGNORE (type, i))
354 {
355 fputs_filtered ("<optimized out or zero length>", stream);
356 }
357 else if (TYPE_FIELD_STATIC (type, i))
358 {
359 value_ptr v = value_static_field (type, i);
360 if (v == NULL)
361 fputs_filtered ("<optimized out>", stream);
362 else
363 {
364 struct type *t = check_typedef (VALUE_TYPE (v));
365 if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
366 v = value_addr (v);
367 val_print (VALUE_TYPE (v),
4ef1f467 368 VALUE_CONTENTS (v), 0, VALUE_ADDRESS (v),
8d2755a9
PB
369 stream, format, 0, recurse+1, pretty);
370 }
371 }
372 else
373 {
374 val_print (TYPE_FIELD_TYPE (type, i),
375 valaddr + TYPE_FIELD_BITPOS (type, i) / 8,
4ef1f467 376 0,
8d2755a9
PB
377 address + TYPE_FIELD_BITPOS (type, i) / 8,
378 stream, format, 0, recurse + 1, pretty);
379 }
380 }
381 annotate_field_end ();
382 }
383
384 if (pretty)
385 {
386 fprintf_filtered (stream, "\n");
387 print_spaces_filtered (2 * recurse, stream);
388 }
389 }
390 fprintf_filtered (stream, "}");
391}
392
242c0d81
SG
393/* Print data of type TYPE located at VALADDR (within GDB), which came from
394 the inferior at address ADDRESS, onto stdio stream STREAM according to
395 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
396 target byte order.
397
398 If the data are a string pointer, returns the number of string characters
399 printed.
400
401 If DEREF_REF is nonzero, then dereference references, otherwise just print
402 them like pointers.
403
404 The PRETTY parameter controls prettyprinting. */
405
7a9eb4c4 406int
4ef1f467
DT
407java_val_print (type, valaddr, embedded_offset, address, stream, format,
408 deref_ref, recurse, pretty)
7a9eb4c4
PB
409 struct type *type;
410 char *valaddr;
4ef1f467 411 int embedded_offset;
7a9eb4c4
PB
412 CORE_ADDR address;
413 GDB_FILE *stream;
414 int format;
415 int deref_ref;
416 int recurse;
417 enum val_prettyprint pretty;
418{
fc655dc2 419 register unsigned int i = 0; /* Number of characters printed */
242c0d81 420 struct type *target_type;
fc655dc2
PB
421 CORE_ADDR addr;
422
d2e131a1 423 CHECK_TYPEDEF (type);
fc655dc2 424 switch (TYPE_CODE (type))
7a9eb4c4 425 {
fc655dc2
PB
426 case TYPE_CODE_PTR:
427 if (format && format != 's')
7a9eb4c4 428 {
fc655dc2
PB
429 print_scalar_formatted (valaddr, type, format, 0, stream);
430 break;
7a9eb4c4 431 }
fc655dc2
PB
432#if 0
433 if (vtblprint && cp_is_vtbl_ptr_type(type))
434 {
435 /* Print the unmangled name if desired. */
436 /* Print vtable entry - we only get here if we ARE using
437 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
438 print_address_demangle(extract_address (valaddr, TYPE_LENGTH (type)),
439 stream, demangle);
440 break;
441 }
442#endif
443 addr = unpack_pointer (type, valaddr);
444 if (addr == 0)
445 {
446 fputs_filtered ("null", stream);
447 return i;
448 }
242c0d81 449 target_type = check_typedef (TYPE_TARGET_TYPE (type));
fc655dc2 450
242c0d81
SG
451 if (TYPE_CODE (target_type) == TYPE_CODE_FUNC)
452 {
453 /* Try to print what function it points to. */
454 print_address_demangle (addr, stream, demangle);
455 /* Return value is irrelevant except for string pointers. */
456 return (0);
457 }
fc655dc2 458
242c0d81
SG
459 if (addressprint && format != 's')
460 {
461 fputs_filtered ("@", stream);
462 print_longest (stream, 'x', 0, (ULONGEST) addr);
fc655dc2 463 }
242c0d81
SG
464
465 return i;
8d2755a9
PB
466 case TYPE_CODE_CHAR:
467 format = format ? format : output_format;
468 if (format)
469 {
470 print_scalar_formatted (valaddr, type, format, 0, stream);
471 }
472 else
473 {
474 LA_PRINT_CHAR ((int) unpack_long (type, valaddr), stream);
475 }
476 break;
477 case TYPE_CODE_STRUCT:
478 java_print_value_fields (type, valaddr, address, stream, format,
479 recurse, pretty);
fc655dc2 480 break;
d2e131a1 481 default:
4ef1f467 482 return c_val_print (type, valaddr, 0, address, stream, format,
d2e131a1
PB
483 deref_ref, recurse, pretty);
484 }
1c3cd1b0 485 return 0;
7a9eb4c4 486}
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