Upgrade GDB from 7.4.1 to 7.6.1 on the vendor branch
[dragonfly.git] / contrib / gdb-7 / gdb / m2-valprint.c
CommitLineData
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1/* Support for printing Modula 2 values for GDB, the GNU debugger.
2
ef5ccd6c 3 Copyright (C) 1986-2013 Free Software Foundation, Inc.
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4
5 This file is part of GDB.
6
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.
11
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.
16
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/>. */
19
20#include "defs.h"
21#include "symtab.h"
22#include "gdbtypes.h"
23#include "expression.h"
24#include "value.h"
25#include "valprint.h"
26#include "language.h"
27#include "typeprint.h"
28#include "c-lang.h"
29#include "m2-lang.h"
30#include "target.h"
31
32static int print_unpacked_pointer (struct type *type,
33 CORE_ADDR address, CORE_ADDR addr,
34 const struct value_print_options *options,
35 struct ui_file *stream);
36static void
37m2_print_array_contents (struct type *type, const gdb_byte *valaddr,
38 int embedded_offset, CORE_ADDR address,
39 struct ui_file *stream, int recurse,
cf7f2e2d 40 const struct value *val,
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41 const struct value_print_options *options,
42 int len);
43
44
5796c8dc
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45/* get_long_set_bounds - assigns the bounds of the long set to low and
46 high. */
47
48int
49get_long_set_bounds (struct type *type, LONGEST *low, LONGEST *high)
50{
51 int len, i;
52
53 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
54 {
55 len = TYPE_NFIELDS (type);
56 i = TYPE_N_BASECLASSES (type);
57 if (len == 0)
58 return 0;
59 *low = TYPE_LOW_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)));
60 *high = TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type,
61 len-1)));
62 return 1;
63 }
64 error (_("expecting long_set"));
65 return 0;
66}
67
68static void
69m2_print_long_set (struct type *type, const gdb_byte *valaddr,
70 int embedded_offset, CORE_ADDR address,
71 struct ui_file *stream)
72{
73 int empty_set = 1;
74 int element_seen = 0;
75 LONGEST previous_low = 0;
76 LONGEST previous_high= 0;
77 LONGEST i, low_bound, high_bound;
78 LONGEST field_low, field_high;
79 struct type *range;
80 int len, field;
81 struct type *target;
82 int bitval;
83
84 CHECK_TYPEDEF (type);
85
86 fprintf_filtered (stream, "{");
87 len = TYPE_NFIELDS (type);
88 if (get_long_set_bounds (type, &low_bound, &high_bound))
89 {
90 field = TYPE_N_BASECLASSES (type);
91 range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
92 }
93 else
94 {
95 fprintf_filtered (stream, " %s }", _("<unknown bounds of set>"));
96 return;
97 }
98
99 target = TYPE_TARGET_TYPE (range);
100
101 if (get_discrete_bounds (range, &field_low, &field_high) >= 0)
102 {
103 for (i = low_bound; i <= high_bound; i++)
104 {
105 bitval = value_bit_index (TYPE_FIELD_TYPE (type, field),
106 (TYPE_FIELD_BITPOS (type, field) / 8) +
107 valaddr + embedded_offset, i);
108 if (bitval < 0)
109 error (_("bit test is out of range"));
110 else if (bitval > 0)
111 {
112 previous_high = i;
113 if (! element_seen)
114 {
115 if (! empty_set)
116 fprintf_filtered (stream, ", ");
117 print_type_scalar (target, i, stream);
118 empty_set = 0;
119 element_seen = 1;
120 previous_low = i;
121 }
122 }
123 else
124 {
125 /* bit is not set */
126 if (element_seen)
127 {
128 if (previous_low+1 < previous_high)
129 fprintf_filtered (stream, "..");
130 if (previous_low+1 < previous_high)
131 print_type_scalar (target, previous_high, stream);
132 element_seen = 0;
133 }
134 }
135 if (i == field_high)
136 {
137 field++;
138 if (field == len)
139 break;
140 range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
141 if (get_discrete_bounds (range, &field_low, &field_high) < 0)
142 break;
143 target = TYPE_TARGET_TYPE (range);
144 }
145 }
146 if (element_seen)
147 {
148 if (previous_low+1 < previous_high)
149 {
150 fprintf_filtered (stream, "..");
151 print_type_scalar (target, previous_high, stream);
152 }
153 element_seen = 0;
154 }
155 fprintf_filtered (stream, "}");
156 }
157}
158
159static void
160m2_print_unbounded_array (struct type *type, const gdb_byte *valaddr,
161 int embedded_offset, CORE_ADDR address,
162 struct ui_file *stream, int recurse,
163 const struct value_print_options *options)
164{
165 struct type *content_type;
166 CORE_ADDR addr;
167 LONGEST len;
168 struct value *val;
169
170 CHECK_TYPEDEF (type);
171 content_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0));
172
173 addr = unpack_pointer (TYPE_FIELD_TYPE (type, 0),
174 (TYPE_FIELD_BITPOS (type, 0) / 8) +
175 valaddr + embedded_offset);
176
177 val = value_at_lazy (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0)),
178 addr);
179 len = unpack_field_as_long (type, valaddr + embedded_offset, 1);
180
181 fprintf_filtered (stream, "{");
c50c785c
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182 m2_print_array_contents (value_type (val),
183 value_contents_for_printing (val),
5796c8dc 184 value_embedded_offset (val), addr, stream,
c50c785c 185 recurse, val, options, len);
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186 fprintf_filtered (stream, ", HIGH = %d}", (int) len);
187}
188
189static int
190print_unpacked_pointer (struct type *type,
191 CORE_ADDR address, CORE_ADDR addr,
192 const struct value_print_options *options,
193 struct ui_file *stream)
194{
195 struct gdbarch *gdbarch = get_type_arch (type);
196 struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
ef5ccd6c 197 int want_space = 0;
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198
199 if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
200 {
201 /* Try to print what function it points to. */
ef5ccd6c 202 print_function_pointer_address (options, gdbarch, addr, stream);
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203 /* Return value is irrelevant except for string pointers. */
204 return 0;
205 }
206
207 if (options->addressprint && options->format != 's')
ef5ccd6c
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208 {
209 fputs_filtered (paddress (gdbarch, address), stream);
210 want_space = 1;
211 }
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212
213 /* For a pointer to char or unsigned char, also print the string
214 pointed to, unless pointer is null. */
215
216 if (TYPE_LENGTH (elttype) == 1
217 && TYPE_CODE (elttype) == TYPE_CODE_INT
218 && (options->format == 0 || options->format == 's')
219 && addr != 0)
ef5ccd6c
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220 {
221 if (want_space)
222 fputs_filtered (" ", stream);
223 return val_print_string (TYPE_TARGET_TYPE (type), NULL, addr, -1,
224 stream, options);
225 }
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226
227 return 0;
228}
229
230static void
231print_variable_at_address (struct type *type,
232 const gdb_byte *valaddr,
233 struct ui_file *stream,
234 int recurse,
235 const struct value_print_options *options)
236{
237 struct gdbarch *gdbarch = get_type_arch (type);
238 CORE_ADDR addr = unpack_pointer (type, valaddr);
239 struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
240
241 fprintf_filtered (stream, "[");
242 fputs_filtered (paddress (gdbarch, addr), stream);
243 fprintf_filtered (stream, "] : ");
244
245 if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
246 {
247 struct value *deref_val =
248 value_at (TYPE_TARGET_TYPE (type), unpack_pointer (type, valaddr));
cf7f2e2d 249
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250 common_val_print (deref_val, stream, recurse, options, current_language);
251 }
252 else
253 fputs_filtered ("???", stream);
254}
255
256
257/* m2_print_array_contents - prints out the contents of an
258 array up to a max_print values.
259 It prints arrays of char as a string
260 and all other data types as comma
261 separated values. */
262
263static void
264m2_print_array_contents (struct type *type, const gdb_byte *valaddr,
265 int embedded_offset, CORE_ADDR address,
266 struct ui_file *stream, int recurse,
cf7f2e2d 267 const struct value *val,
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268 const struct value_print_options *options,
269 int len)
270{
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271 CHECK_TYPEDEF (type);
272
273 if (TYPE_LENGTH (type) > 0)
274 {
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275 if (options->prettyprint_arrays)
276 print_spaces_filtered (2 + 2 * recurse, stream);
277 /* For an array of chars, print with string syntax. */
ef5ccd6c 278 if (TYPE_LENGTH (type) == 1 &&
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279 ((TYPE_CODE (type) == TYPE_CODE_INT)
280 || ((current_language->la_language == language_m2)
281 && (TYPE_CODE (type) == TYPE_CODE_CHAR)))
282 && (options->format == 0 || options->format == 's'))
c50c785c 283 val_print_string (type, NULL, address, len+1, stream, options);
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284 else
285 {
286 fprintf_filtered (stream, "{");
c50c785c 287 val_print_array_elements (type, valaddr, embedded_offset,
cf7f2e2d
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288 address, stream, recurse, val,
289 options, 0);
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290 fprintf_filtered (stream, "}");
291 }
292 }
293}
294
ef5ccd6c
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295/* Decorations for Modula 2. */
296
297static const struct generic_val_print_decorations m2_decorations =
298{
299 "",
300 " + ",
301 " * I",
302 "TRUE",
303 "FALSE",
304 "void"
305};
5796c8dc 306
c50c785c 307/* See val_print for a description of the various parameters of this
ef5ccd6c 308 function; they are identical. */
5796c8dc 309
ef5ccd6c 310void
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311m2_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
312 CORE_ADDR address, struct ui_file *stream, int recurse,
cf7f2e2d 313 const struct value *original_value,
5796c8dc
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314 const struct value_print_options *options)
315{
316 struct gdbarch *gdbarch = get_type_arch (type);
c50c785c 317 unsigned int i = 0; /* Number of characters printed. */
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318 unsigned len;
319 struct type *elttype;
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320 CORE_ADDR addr;
321
322 CHECK_TYPEDEF (type);
323 switch (TYPE_CODE (type))
324 {
325 case TYPE_CODE_ARRAY:
326 if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
327 {
328 elttype = check_typedef (TYPE_TARGET_TYPE (type));
ef5ccd6c 329 len = TYPE_LENGTH (type) / TYPE_LENGTH (elttype);
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330 if (options->prettyprint_arrays)
331 print_spaces_filtered (2 + 2 * recurse, stream);
332 /* For an array of chars, print with string syntax. */
ef5ccd6c 333 if (TYPE_LENGTH (elttype) == 1 &&
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334 ((TYPE_CODE (elttype) == TYPE_CODE_INT)
335 || ((current_language->la_language == language_m2)
336 && (TYPE_CODE (elttype) == TYPE_CODE_CHAR)))
337 && (options->format == 0 || options->format == 's'))
338 {
339 /* If requested, look for the first null char and only print
340 elements up to it. */
341 if (options->stop_print_at_null)
342 {
343 unsigned int temp_len;
344
c50c785c 345 /* Look for a NULL char. */
5796c8dc
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346 for (temp_len = 0;
347 (valaddr + embedded_offset)[temp_len]
348 && temp_len < len && temp_len < options->print_max;
349 temp_len++);
350 len = temp_len;
351 }
352
353 LA_PRINT_STRING (stream, TYPE_TARGET_TYPE (type),
cf7f2e2d
JM
354 valaddr + embedded_offset, len, NULL,
355 0, options);
5796c8dc
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356 i = len;
357 }
358 else
359 {
360 fprintf_filtered (stream, "{");
c50c785c
JM
361 val_print_array_elements (type, valaddr, embedded_offset,
362 address, stream,
363 recurse, original_value,
cf7f2e2d 364 options, 0);
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365 fprintf_filtered (stream, "}");
366 }
367 break;
368 }
369 /* Array of unspecified length: treat like pointer to first elt. */
370 print_unpacked_pointer (type, address, address, options, stream);
371 break;
372
373 case TYPE_CODE_PTR:
374 if (TYPE_CONST (type))
375 print_variable_at_address (type, valaddr + embedded_offset,
376 stream, recurse, options);
377 else if (options->format && options->format != 's')
c50c785c
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378 val_print_scalar_formatted (type, valaddr, embedded_offset,
379 original_value, options, 0, stream);
5796c8dc
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380 else
381 {
382 addr = unpack_pointer (type, valaddr + embedded_offset);
383 print_unpacked_pointer (type, addr, address, options, stream);
384 }
385 break;
386
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387 case TYPE_CODE_UNION:
388 if (recurse && !options->unionprint)
389 {
390 fprintf_filtered (stream, "{...}");
391 break;
392 }
393 /* Fall through. */
394 case TYPE_CODE_STRUCT:
395 if (m2_is_long_set (type))
396 m2_print_long_set (type, valaddr, embedded_offset, address,
397 stream);
398 else if (m2_is_unbounded_array (type))
399 m2_print_unbounded_array (type, valaddr, embedded_offset,
400 address, stream, recurse, options);
401 else
402 cp_print_value_fields (type, type, valaddr, embedded_offset,
cf7f2e2d
JM
403 address, stream, recurse, original_value,
404 options, NULL, 0);
5796c8dc
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405 break;
406
5796c8dc
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407 case TYPE_CODE_SET:
408 elttype = TYPE_INDEX_TYPE (type);
409 CHECK_TYPEDEF (elttype);
410 if (TYPE_STUB (elttype))
411 {
412 fprintf_filtered (stream, _("<incomplete type>"));
413 gdb_flush (stream);
414 break;
415 }
416 else
417 {
418 struct type *range = elttype;
419 LONGEST low_bound, high_bound;
420 int i;
5796c8dc
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421 int need_comma = 0;
422
ef5ccd6c 423 fputs_filtered ("{", stream);
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424
425 i = get_discrete_bounds (range, &low_bound, &high_bound);
426 maybe_bad_bstring:
427 if (i < 0)
428 {
429 fputs_filtered (_("<error value>"), stream);
430 goto done;
431 }
432
433 for (i = low_bound; i <= high_bound; i++)
434 {
435 int element = value_bit_index (type, valaddr + embedded_offset,
436 i);
cf7f2e2d 437
5796c8dc
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438 if (element < 0)
439 {
440 i = element;
441 goto maybe_bad_bstring;
442 }
ef5ccd6c 443 if (element)
5796c8dc
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444 {
445 if (need_comma)
446 fputs_filtered (", ", stream);
447 print_type_scalar (range, i, stream);
448 need_comma = 1;
449
450 if (i + 1 <= high_bound
451 && value_bit_index (type, valaddr + embedded_offset,
452 ++i))
453 {
454 int j = i;
cf7f2e2d 455
5796c8dc
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456 fputs_filtered ("..", stream);
457 while (i + 1 <= high_bound
458 && value_bit_index (type,
459 valaddr + embedded_offset,
460 ++i))
461 j = i;
462 print_type_scalar (range, j, stream);
463 }
464 }
465 }
466 done:
ef5ccd6c 467 fputs_filtered ("}", stream);
5796c8dc
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468 }
469 break;
470
ef5ccd6c
JM
471 case TYPE_CODE_RANGE:
472 if (TYPE_LENGTH (type) == TYPE_LENGTH (TYPE_TARGET_TYPE (type)))
473 {
474 m2_val_print (TYPE_TARGET_TYPE (type), valaddr, embedded_offset,
475 address, stream, recurse, original_value, options);
476 break;
477 }
478 /* FIXME: create_range_type does not set the unsigned bit in a
479 range type (I think it probably should copy it from the target
480 type), so we won't print values which are too large to
481 fit in a signed integer correctly. */
482 /* FIXME: Doesn't handle ranges of enums correctly. (Can't just
483 print with the target type, though, because the size of our type
484 and the target type might differ). */
485 /* FALLTHROUGH */
5796c8dc 486
ef5ccd6c
JM
487 case TYPE_CODE_REF:
488 case TYPE_CODE_ENUM:
489 case TYPE_CODE_FUNC:
490 case TYPE_CODE_INT:
491 case TYPE_CODE_FLT:
492 case TYPE_CODE_METHOD:
493 case TYPE_CODE_VOID:
5796c8dc 494 case TYPE_CODE_ERROR:
5796c8dc 495 case TYPE_CODE_UNDEF:
ef5ccd6c
JM
496 case TYPE_CODE_BOOL:
497 case TYPE_CODE_CHAR:
5796c8dc 498 default:
ef5ccd6c
JM
499 generic_val_print (type, valaddr, embedded_offset, address,
500 stream, recurse, original_value, options,
501 &m2_decorations);
502 break;
5796c8dc
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503 }
504 gdb_flush (stream);
5796c8dc 505}