1 /* Support for printing Modula 2 values for GDB, the GNU debugger.
3 Copyright (C) 1986, 1988-1989, 1991-1992, 1996, 1998, 2000, 2005-2012
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "expression.h"
28 #include "typeprint.h"
33 static int print_unpacked_pointer (struct type *type,
34 CORE_ADDR address, CORE_ADDR addr,
35 const struct value_print_options *options,
36 struct ui_file *stream);
38 m2_print_array_contents (struct type *type, const gdb_byte *valaddr,
39 int embedded_offset, CORE_ADDR address,
40 struct ui_file *stream, int recurse,
41 const struct value *val,
42 const struct value_print_options *options,
46 /* get_long_set_bounds - assigns the bounds of the long set to low and
50 get_long_set_bounds (struct type *type, LONGEST *low, LONGEST *high)
54 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
56 len = TYPE_NFIELDS (type);
57 i = TYPE_N_BASECLASSES (type);
60 *low = TYPE_LOW_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)));
61 *high = TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type,
65 error (_("expecting long_set"));
70 m2_print_long_set (struct type *type, const gdb_byte *valaddr,
71 int embedded_offset, CORE_ADDR address,
72 struct ui_file *stream)
76 LONGEST previous_low = 0;
77 LONGEST previous_high= 0;
78 LONGEST i, low_bound, high_bound;
79 LONGEST field_low, field_high;
87 fprintf_filtered (stream, "{");
88 len = TYPE_NFIELDS (type);
89 if (get_long_set_bounds (type, &low_bound, &high_bound))
91 field = TYPE_N_BASECLASSES (type);
92 range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
96 fprintf_filtered (stream, " %s }", _("<unknown bounds of set>"));
100 target = TYPE_TARGET_TYPE (range);
102 if (get_discrete_bounds (range, &field_low, &field_high) >= 0)
104 for (i = low_bound; i <= high_bound; i++)
106 bitval = value_bit_index (TYPE_FIELD_TYPE (type, field),
107 (TYPE_FIELD_BITPOS (type, field) / 8) +
108 valaddr + embedded_offset, i);
110 error (_("bit test is out of range"));
117 fprintf_filtered (stream, ", ");
118 print_type_scalar (target, i, stream);
129 if (previous_low+1 < previous_high)
130 fprintf_filtered (stream, "..");
131 if (previous_low+1 < previous_high)
132 print_type_scalar (target, previous_high, stream);
141 range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
142 if (get_discrete_bounds (range, &field_low, &field_high) < 0)
144 target = TYPE_TARGET_TYPE (range);
149 if (previous_low+1 < previous_high)
151 fprintf_filtered (stream, "..");
152 print_type_scalar (target, previous_high, stream);
156 fprintf_filtered (stream, "}");
161 m2_print_unbounded_array (struct type *type, const gdb_byte *valaddr,
162 int embedded_offset, CORE_ADDR address,
163 struct ui_file *stream, int recurse,
164 const struct value_print_options *options)
166 struct type *content_type;
171 CHECK_TYPEDEF (type);
172 content_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0));
174 addr = unpack_pointer (TYPE_FIELD_TYPE (type, 0),
175 (TYPE_FIELD_BITPOS (type, 0) / 8) +
176 valaddr + embedded_offset);
178 val = value_at_lazy (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0)),
180 len = unpack_field_as_long (type, valaddr + embedded_offset, 1);
182 fprintf_filtered (stream, "{");
183 m2_print_array_contents (value_type (val),
184 value_contents_for_printing (val),
185 value_embedded_offset (val), addr, stream,
186 recurse, val, options, len);
187 fprintf_filtered (stream, ", HIGH = %d}", (int) len);
191 print_unpacked_pointer (struct type *type,
192 CORE_ADDR address, CORE_ADDR addr,
193 const struct value_print_options *options,
194 struct ui_file *stream)
196 struct gdbarch *gdbarch = get_type_arch (type);
197 struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
199 if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
201 /* Try to print what function it points to. */
202 print_function_pointer_address (gdbarch, addr, stream,
203 options->addressprint);
204 /* Return value is irrelevant except for string pointers. */
208 if (options->addressprint && options->format != 's')
209 fputs_filtered (paddress (gdbarch, address), stream);
211 /* For a pointer to char or unsigned char, also print the string
212 pointed to, unless pointer is null. */
214 if (TYPE_LENGTH (elttype) == 1
215 && TYPE_CODE (elttype) == TYPE_CODE_INT
216 && (options->format == 0 || options->format == 's')
218 return val_print_string (TYPE_TARGET_TYPE (type), NULL, addr, -1,
225 print_variable_at_address (struct type *type,
226 const gdb_byte *valaddr,
227 struct ui_file *stream,
229 const struct value_print_options *options)
231 struct gdbarch *gdbarch = get_type_arch (type);
232 CORE_ADDR addr = unpack_pointer (type, valaddr);
233 struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
235 fprintf_filtered (stream, "[");
236 fputs_filtered (paddress (gdbarch, addr), stream);
237 fprintf_filtered (stream, "] : ");
239 if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
241 struct value *deref_val =
242 value_at (TYPE_TARGET_TYPE (type), unpack_pointer (type, valaddr));
244 common_val_print (deref_val, stream, recurse, options, current_language);
247 fputs_filtered ("???", stream);
251 /* m2_print_array_contents - prints out the contents of an
252 array up to a max_print values.
253 It prints arrays of char as a string
254 and all other data types as comma
258 m2_print_array_contents (struct type *type, const gdb_byte *valaddr,
259 int embedded_offset, CORE_ADDR address,
260 struct ui_file *stream, int recurse,
261 const struct value *val,
262 const struct value_print_options *options,
266 CHECK_TYPEDEF (type);
268 if (TYPE_LENGTH (type) > 0)
270 eltlen = TYPE_LENGTH (type);
271 if (options->prettyprint_arrays)
272 print_spaces_filtered (2 + 2 * recurse, stream);
273 /* For an array of chars, print with string syntax. */
275 ((TYPE_CODE (type) == TYPE_CODE_INT)
276 || ((current_language->la_language == language_m2)
277 && (TYPE_CODE (type) == TYPE_CODE_CHAR)))
278 && (options->format == 0 || options->format == 's'))
279 val_print_string (type, NULL, address, len+1, stream, options);
282 fprintf_filtered (stream, "{");
283 val_print_array_elements (type, valaddr, embedded_offset,
284 address, stream, recurse, val,
286 fprintf_filtered (stream, "}");
292 /* See val_print for a description of the various parameters of this
293 function; they are identical. The semantics of the return value is
294 also identical to val_print. */
297 m2_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
298 CORE_ADDR address, struct ui_file *stream, int recurse,
299 const struct value *original_value,
300 const struct value_print_options *options)
302 struct gdbarch *gdbarch = get_type_arch (type);
303 unsigned int i = 0; /* Number of characters printed. */
305 struct type *elttype;
310 CHECK_TYPEDEF (type);
311 switch (TYPE_CODE (type))
313 case TYPE_CODE_ARRAY:
314 if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
316 elttype = check_typedef (TYPE_TARGET_TYPE (type));
317 eltlen = TYPE_LENGTH (elttype);
318 len = TYPE_LENGTH (type) / eltlen;
319 if (options->prettyprint_arrays)
320 print_spaces_filtered (2 + 2 * recurse, stream);
321 /* For an array of chars, print with string syntax. */
323 ((TYPE_CODE (elttype) == TYPE_CODE_INT)
324 || ((current_language->la_language == language_m2)
325 && (TYPE_CODE (elttype) == TYPE_CODE_CHAR)))
326 && (options->format == 0 || options->format == 's'))
328 /* If requested, look for the first null char and only print
329 elements up to it. */
330 if (options->stop_print_at_null)
332 unsigned int temp_len;
334 /* Look for a NULL char. */
336 (valaddr + embedded_offset)[temp_len]
337 && temp_len < len && temp_len < options->print_max;
342 LA_PRINT_STRING (stream, TYPE_TARGET_TYPE (type),
343 valaddr + embedded_offset, len, NULL,
349 fprintf_filtered (stream, "{");
350 val_print_array_elements (type, valaddr, embedded_offset,
352 recurse, original_value,
354 fprintf_filtered (stream, "}");
358 /* Array of unspecified length: treat like pointer to first elt. */
359 print_unpacked_pointer (type, address, address, options, stream);
363 if (TYPE_CONST (type))
364 print_variable_at_address (type, valaddr + embedded_offset,
365 stream, recurse, options);
366 else if (options->format && options->format != 's')
367 val_print_scalar_formatted (type, valaddr, embedded_offset,
368 original_value, options, 0, stream);
371 addr = unpack_pointer (type, valaddr + embedded_offset);
372 print_unpacked_pointer (type, addr, address, options, stream);
377 elttype = check_typedef (TYPE_TARGET_TYPE (type));
378 if (options->addressprint)
381 = extract_typed_address (valaddr + embedded_offset, type);
383 fprintf_filtered (stream, "@");
384 fputs_filtered (paddress (gdbarch, addr), stream);
385 if (options->deref_ref)
386 fputs_filtered (": ", stream);
388 /* De-reference the reference. */
389 if (options->deref_ref)
391 if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
393 struct value *deref_val =
395 (TYPE_TARGET_TYPE (type),
396 unpack_pointer (type, valaddr + embedded_offset));
398 common_val_print (deref_val, stream, recurse, options,
402 fputs_filtered ("???", stream);
406 case TYPE_CODE_UNION:
407 if (recurse && !options->unionprint)
409 fprintf_filtered (stream, "{...}");
413 case TYPE_CODE_STRUCT:
414 if (m2_is_long_set (type))
415 m2_print_long_set (type, valaddr, embedded_offset, address,
417 else if (m2_is_unbounded_array (type))
418 m2_print_unbounded_array (type, valaddr, embedded_offset,
419 address, stream, recurse, options);
421 cp_print_value_fields (type, type, valaddr, embedded_offset,
422 address, stream, recurse, original_value,
429 val_print_scalar_formatted (type, valaddr, embedded_offset,
430 original_value, options, 0, stream);
433 len = TYPE_NFIELDS (type);
434 val = unpack_long (type, valaddr + embedded_offset);
435 for (i = 0; i < len; i++)
438 if (val == TYPE_FIELD_BITPOS (type, i))
445 fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
449 print_longest (stream, 'd', 0, val);
456 val_print_scalar_formatted (type, valaddr, embedded_offset,
457 original_value, options, 0, stream);
460 /* FIXME, we should consider, at least for ANSI C language, eliminating
461 the distinction made between FUNCs and POINTERs to FUNCs. */
462 fprintf_filtered (stream, "{");
463 type_print (type, "", stream, -1);
464 fprintf_filtered (stream, "} ");
465 /* Try to print what function it points to, and its address. */
466 print_address_demangle (gdbarch, address, stream, demangle);
470 if (options->format || options->output_format)
472 struct value_print_options opts = *options;
474 opts.format = (options->format ? options->format
475 : options->output_format);
476 val_print_scalar_formatted (type, valaddr, embedded_offset,
477 original_value, &opts, 0, stream);
481 val = unpack_long (type, valaddr + embedded_offset);
483 fputs_filtered ("FALSE", stream);
485 fputs_filtered ("TRUE", stream);
487 fprintf_filtered (stream, "%ld)", (long int) val);
491 case TYPE_CODE_RANGE:
492 if (TYPE_LENGTH (type) == TYPE_LENGTH (TYPE_TARGET_TYPE (type)))
494 m2_val_print (TYPE_TARGET_TYPE (type), valaddr, embedded_offset,
495 address, stream, recurse, original_value, options);
498 /* FIXME: create_range_type does not set the unsigned bit in a
499 range type (I think it probably should copy it from the target
500 type), so we won't print values which are too large to
501 fit in a signed integer correctly. */
502 /* FIXME: Doesn't handle ranges of enums correctly. (Can't just
503 print with the target type, though, because the size of our type
504 and the target type might differ). */
508 if (options->format || options->output_format)
510 struct value_print_options opts = *options;
512 opts.format = (options->format ? options->format
513 : options->output_format);
514 val_print_scalar_formatted (type, valaddr, embedded_offset,
515 original_value, &opts, 0, stream);
518 val_print_type_code_int (type, valaddr + embedded_offset, stream);
522 if (options->format || options->output_format)
524 struct value_print_options opts = *options;
526 opts.format = (options->format ? options->format
527 : options->output_format);
528 val_print_scalar_formatted (type, valaddr, embedded_offset,
529 original_value, &opts, 0, stream);
533 val = unpack_long (type, valaddr + embedded_offset);
534 if (TYPE_UNSIGNED (type))
535 fprintf_filtered (stream, "%u", (unsigned int) val);
537 fprintf_filtered (stream, "%d", (int) val);
538 fputs_filtered (" ", stream);
539 LA_PRINT_CHAR ((unsigned char) val, type, stream);
545 val_print_scalar_formatted (type, valaddr, embedded_offset,
546 original_value, options, 0, stream);
548 print_floating (valaddr + embedded_offset, type, stream);
551 case TYPE_CODE_METHOD:
554 case TYPE_CODE_BITSTRING:
556 elttype = TYPE_INDEX_TYPE (type);
557 CHECK_TYPEDEF (elttype);
558 if (TYPE_STUB (elttype))
560 fprintf_filtered (stream, _("<incomplete type>"));
566 struct type *range = elttype;
567 LONGEST low_bound, high_bound;
569 int is_bitstring = TYPE_CODE (type) == TYPE_CODE_BITSTRING;
573 fputs_filtered ("B'", stream);
575 fputs_filtered ("{", stream);
577 i = get_discrete_bounds (range, &low_bound, &high_bound);
581 fputs_filtered (_("<error value>"), stream);
585 for (i = low_bound; i <= high_bound; i++)
587 int element = value_bit_index (type, valaddr + embedded_offset,
593 goto maybe_bad_bstring;
596 fprintf_filtered (stream, "%d", element);
600 fputs_filtered (", ", stream);
601 print_type_scalar (range, i, stream);
604 if (i + 1 <= high_bound
605 && value_bit_index (type, valaddr + embedded_offset,
610 fputs_filtered ("..", stream);
611 while (i + 1 <= high_bound
612 && value_bit_index (type,
613 valaddr + embedded_offset,
616 print_type_scalar (range, j, stream);
622 fputs_filtered ("'", stream);
624 fputs_filtered ("}", stream);
629 fprintf_filtered (stream, "void");
632 case TYPE_CODE_ERROR:
633 fprintf_filtered (stream, "%s", TYPE_ERROR_NAME (type));
636 case TYPE_CODE_UNDEF:
637 /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
638 dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
639 and no complete type for struct foo in that file. */
640 fprintf_filtered (stream, _("<incomplete type>"));
644 error (_("Invalid m2 type code %d in symbol table."), TYPE_CODE (type));