1 /* Support for printing Modula 2 values for GDB, the GNU debugger.
3 Copyright (C) 1986, 1988, 1989, 1991, 1992, 1996, 1998, 2000, 2005, 2006,
4 2007, 2008 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 int print_unpacked_pointer (struct type *type,
34 CORE_ADDR address, CORE_ADDR addr,
35 int format, struct ui_file *stream);
37 m2_print_array_contents (struct type *type, const gdb_byte *valaddr,
38 int embedded_offset, CORE_ADDR address,
39 struct ui_file *stream, int format,
40 enum val_prettyprint pretty,
41 int deref_ref, int recurse, int len);
44 /* Print function pointer with inferior address ADDRESS onto stdio
48 print_function_pointer_address (CORE_ADDR address, struct ui_file *stream)
50 CORE_ADDR func_addr = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
54 /* If the function pointer is represented by a description, print the
55 address of the description. */
56 if (addressprint && func_addr != address)
58 fputs_filtered ("@", stream);
59 fputs_filtered (paddress (address), stream);
60 fputs_filtered (": ", stream);
62 print_address_demangle (func_addr, stream, demangle);
65 /* get_long_set_bounds - assigns the bounds of the long set to low and
69 get_long_set_bounds (struct type *type, LONGEST *low, LONGEST *high)
73 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
75 len = TYPE_NFIELDS (type);
76 i = TYPE_N_BASECLASSES (type);
79 *low = TYPE_LOW_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)));
80 *high = TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type,
84 error (_("expecting long_set"));
89 m2_print_long_set (struct type *type, const gdb_byte *valaddr,
90 int embedded_offset, CORE_ADDR address,
91 struct ui_file *stream, int format,
92 enum val_prettyprint pretty)
96 LONGEST previous_low = 0;
97 LONGEST previous_high= 0;
98 LONGEST i, low_bound, high_bound;
99 LONGEST field_low, field_high;
105 CHECK_TYPEDEF (type);
107 fprintf_filtered (stream, "{");
108 len = TYPE_NFIELDS (type);
109 if (get_long_set_bounds (type, &low_bound, &high_bound))
111 field = TYPE_N_BASECLASSES (type);
112 range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
116 fprintf_filtered (stream, " %s }", _("<unknown bounds of set>"));
120 target = TYPE_TARGET_TYPE (range);
122 target = builtin_type_int;
124 if (get_discrete_bounds (range, &field_low, &field_high) >= 0)
126 for (i = low_bound; i <= high_bound; i++)
128 bitval = value_bit_index (TYPE_FIELD_TYPE (type, field),
129 (TYPE_FIELD_BITPOS (type, field) / 8) +
130 valaddr + embedded_offset, i);
132 error (_("bit test is out of range"));
139 fprintf_filtered (stream, ", ");
140 print_type_scalar (target, i, stream);
151 if (previous_low+1 < previous_high)
152 fprintf_filtered (stream, "..");
153 if (previous_low+1 < previous_high)
154 print_type_scalar (target, previous_high, stream);
163 range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
164 if (get_discrete_bounds (range, &field_low, &field_high) < 0)
166 target = TYPE_TARGET_TYPE (range);
168 target = builtin_type_int;
173 if (previous_low+1 < previous_high)
175 fprintf_filtered (stream, "..");
176 print_type_scalar (target, previous_high, stream);
180 fprintf_filtered (stream, "}");
185 m2_print_unbounded_array (struct type *type, const gdb_byte *valaddr,
186 int embedded_offset, CORE_ADDR address,
187 struct ui_file *stream, int format,
188 int deref_ref, enum val_prettyprint pretty,
191 struct type *content_type;
196 CHECK_TYPEDEF (type);
197 content_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0));
199 addr = unpack_pointer (TYPE_FIELD_TYPE (type, 0),
200 (TYPE_FIELD_BITPOS (type, 0) / 8) +
201 valaddr + embedded_offset);
203 val = value_at_lazy (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0)),
205 len = unpack_field_as_long (type, valaddr + embedded_offset, 1);
207 fprintf_filtered (stream, "{");
208 m2_print_array_contents (value_type (val), value_contents(val),
209 value_embedded_offset (val), addr, stream,
210 format, deref_ref, pretty, recurse, len);
211 fprintf_filtered (stream, ", HIGH = %d}", (int) len);
215 print_unpacked_pointer (struct type *type,
216 CORE_ADDR address, CORE_ADDR addr,
217 int format, struct ui_file *stream)
219 struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
221 if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
223 /* Try to print what function it points to. */
224 print_function_pointer_address (addr, stream);
225 /* Return value is irrelevant except for string pointers. */
229 if (addressprint && format != 's')
230 fputs_filtered (paddress (address), stream);
232 /* For a pointer to char or unsigned char, also print the string
233 pointed to, unless pointer is null. */
235 if (TYPE_LENGTH (elttype) == 1
236 && TYPE_CODE (elttype) == TYPE_CODE_INT
237 && (format == 0 || format == 's')
239 return val_print_string (addr, -1, TYPE_LENGTH (elttype), stream);
245 print_variable_at_address (struct type *type,
246 const gdb_byte *valaddr,
247 struct ui_file *stream, int format,
248 int deref_ref, int recurse,
249 enum val_prettyprint pretty)
251 CORE_ADDR addr = unpack_pointer (type, valaddr);
252 struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
254 fprintf_filtered (stream, "[");
255 fputs_filtered (paddress (addr), stream);
256 fprintf_filtered (stream, "] : ");
258 if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
260 struct value *deref_val =
262 (TYPE_TARGET_TYPE (type),
263 unpack_pointer (lookup_pointer_type (builtin_type_void),
265 common_val_print (deref_val, stream, format, deref_ref,
269 fputs_filtered ("???", stream);
273 /* m2_print_array_contents - prints out the contents of an
274 array up to a max_print values.
275 It prints arrays of char as a string
276 and all other data types as comma
280 m2_print_array_contents (struct type *type, const gdb_byte *valaddr,
281 int embedded_offset, CORE_ADDR address,
282 struct ui_file *stream, int format,
283 enum val_prettyprint pretty,
284 int deref_ref, int recurse, int len)
287 CHECK_TYPEDEF (type);
289 if (TYPE_LENGTH (type) > 0)
291 eltlen = TYPE_LENGTH (type);
292 if (prettyprint_arrays)
293 print_spaces_filtered (2 + 2 * recurse, stream);
294 /* For an array of chars, print with string syntax. */
296 ((TYPE_CODE (type) == TYPE_CODE_INT)
297 || ((current_language->la_language == language_m2)
298 && (TYPE_CODE (type) == TYPE_CODE_CHAR)))
299 && (format == 0 || format == 's'))
300 val_print_string (address, len+1, eltlen, stream);
303 fprintf_filtered (stream, "{");
304 val_print_array_elements (type, valaddr + embedded_offset,
305 address, stream, format,
306 deref_ref, recurse, pretty, 0);
307 fprintf_filtered (stream, "}");
313 /* Print data of type TYPE located at VALADDR (within GDB), which came from
314 the inferior at address ADDRESS, onto stdio stream STREAM according to
315 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
318 If the data are a string pointer, returns the number of string characters
321 If DEREF_REF is nonzero, then dereference references, otherwise just print
324 The PRETTY parameter controls prettyprinting. */
327 m2_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
328 CORE_ADDR address, struct ui_file *stream, int format,
329 int deref_ref, int recurse, enum val_prettyprint pretty)
331 unsigned int i = 0; /* Number of characters printed */
333 struct type *elttype;
335 int length_pos, length_size, string_pos;
340 CHECK_TYPEDEF (type);
341 switch (TYPE_CODE (type))
343 case TYPE_CODE_ARRAY:
344 if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
346 elttype = check_typedef (TYPE_TARGET_TYPE (type));
347 eltlen = TYPE_LENGTH (elttype);
348 len = TYPE_LENGTH (type) / eltlen;
349 if (prettyprint_arrays)
350 print_spaces_filtered (2 + 2 * recurse, stream);
351 /* For an array of chars, print with string syntax. */
353 ((TYPE_CODE (elttype) == TYPE_CODE_INT)
354 || ((current_language->la_language == language_m2)
355 && (TYPE_CODE (elttype) == TYPE_CODE_CHAR)))
356 && (format == 0 || format == 's'))
358 /* If requested, look for the first null char and only print
359 elements up to it. */
360 if (stop_print_at_null)
362 unsigned int temp_len;
364 /* Look for a NULL char. */
366 (valaddr + embedded_offset)[temp_len]
367 && temp_len < len && temp_len < print_max;
372 LA_PRINT_STRING (stream, valaddr + embedded_offset, len, 1, 0);
377 fprintf_filtered (stream, "{");
378 val_print_array_elements (type, valaddr + embedded_offset,
379 address, stream, format, deref_ref,
381 fprintf_filtered (stream, "}");
385 /* Array of unspecified length: treat like pointer to first elt. */
386 print_unpacked_pointer (type, address, address, format, stream);
390 if (TYPE_CONST (type))
391 print_variable_at_address (type, valaddr + embedded_offset,
392 stream, format, deref_ref, recurse,
394 else if (format && format != 's')
395 print_scalar_formatted (valaddr + embedded_offset, type, format,
399 addr = unpack_pointer (type, valaddr + embedded_offset);
400 print_unpacked_pointer (type, addr, address, format, stream);
405 elttype = check_typedef (TYPE_TARGET_TYPE (type));
409 = extract_typed_address (valaddr + embedded_offset, type);
410 fprintf_filtered (stream, "@");
411 fputs_filtered (paddress (addr), stream);
413 fputs_filtered (": ", stream);
415 /* De-reference the reference. */
418 if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
420 struct value *deref_val =
422 (TYPE_TARGET_TYPE (type),
423 unpack_pointer (lookup_pointer_type (builtin_type_void),
424 valaddr + embedded_offset));
425 common_val_print (deref_val, stream, format, deref_ref,
429 fputs_filtered ("???", stream);
433 case TYPE_CODE_UNION:
434 if (recurse && !unionprint)
436 fprintf_filtered (stream, "{...}");
440 case TYPE_CODE_STRUCT:
441 if (m2_is_long_set (type))
442 m2_print_long_set (type, valaddr, embedded_offset, address,
443 stream, format, pretty);
444 else if (m2_is_unbounded_array (type))
445 m2_print_unbounded_array (type, valaddr, embedded_offset,
446 address, stream, format, deref_ref,
449 cp_print_value_fields (type, type, valaddr, embedded_offset,
450 address, stream, format,
451 recurse, pretty, NULL, 0);
457 print_scalar_formatted (valaddr + embedded_offset, type,
461 len = TYPE_NFIELDS (type);
462 val = unpack_long (type, valaddr + embedded_offset);
463 for (i = 0; i < len; i++)
466 if (val == TYPE_FIELD_BITPOS (type, i))
473 fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
477 print_longest (stream, 'd', 0, val);
484 print_scalar_formatted (valaddr + embedded_offset, type,
488 /* FIXME, we should consider, at least for ANSI C language, eliminating
489 the distinction made between FUNCs and POINTERs to FUNCs. */
490 fprintf_filtered (stream, "{");
491 type_print (type, "", stream, -1);
492 fprintf_filtered (stream, "} ");
493 /* Try to print what function it points to, and its address. */
494 print_address_demangle (address, stream, demangle);
498 format = format ? format : output_format;
500 print_scalar_formatted (valaddr + embedded_offset, type,
504 val = unpack_long (type, valaddr + embedded_offset);
506 fputs_filtered ("FALSE", stream);
508 fputs_filtered ("TRUE", stream);
510 fprintf_filtered (stream, "%ld)", (long int) val);
514 case TYPE_CODE_RANGE:
515 if (TYPE_LENGTH (type) == TYPE_LENGTH (TYPE_TARGET_TYPE (type)))
517 m2_val_print (TYPE_TARGET_TYPE (type), valaddr, embedded_offset,
518 address, stream, format, deref_ref, recurse, pretty);
521 /* FIXME: create_range_type does not set the unsigned bit in a
522 range type (I think it probably should copy it from the target
523 type), so we won't print values which are too large to
524 fit in a signed integer correctly. */
525 /* FIXME: Doesn't handle ranges of enums correctly. (Can't just
526 print with the target type, though, because the size of our type
527 and the target type might differ). */
531 format = format ? format : output_format;
533 print_scalar_formatted (valaddr + embedded_offset, type, format,
536 val_print_type_code_int (type, valaddr + embedded_offset, stream);
540 format = format ? format : output_format;
542 print_scalar_formatted (valaddr + embedded_offset, type,
546 val = unpack_long (type, valaddr + embedded_offset);
547 if (TYPE_UNSIGNED (type))
548 fprintf_filtered (stream, "%u", (unsigned int) val);
550 fprintf_filtered (stream, "%d", (int) val);
551 fputs_filtered (" ", stream);
552 LA_PRINT_CHAR ((unsigned char) val, stream);
558 print_scalar_formatted (valaddr + embedded_offset, type,
561 print_floating (valaddr + embedded_offset, type, stream);
564 case TYPE_CODE_METHOD:
567 case TYPE_CODE_BITSTRING:
569 elttype = TYPE_INDEX_TYPE (type);
570 CHECK_TYPEDEF (elttype);
571 if (TYPE_STUB (elttype))
573 fprintf_filtered (stream, _("<incomplete type>"));
579 struct type *range = elttype;
580 LONGEST low_bound, high_bound;
582 int is_bitstring = TYPE_CODE (type) == TYPE_CODE_BITSTRING;
586 fputs_filtered ("B'", stream);
588 fputs_filtered ("{", stream);
590 i = get_discrete_bounds (range, &low_bound, &high_bound);
594 fputs_filtered (_("<error value>"), stream);
598 for (i = low_bound; i <= high_bound; i++)
600 int element = value_bit_index (type, valaddr + embedded_offset,
605 goto maybe_bad_bstring;
608 fprintf_filtered (stream, "%d", element);
612 fputs_filtered (", ", stream);
613 print_type_scalar (range, i, stream);
616 if (i + 1 <= high_bound
617 && value_bit_index (type, valaddr + embedded_offset,
621 fputs_filtered ("..", stream);
622 while (i + 1 <= high_bound
623 && value_bit_index (type,
624 valaddr + embedded_offset,
627 print_type_scalar (range, j, stream);
633 fputs_filtered ("'", stream);
635 fputs_filtered ("}", stream);
640 fprintf_filtered (stream, "void");
643 case TYPE_CODE_ERROR:
644 fprintf_filtered (stream, _("<error type>"));
647 case TYPE_CODE_UNDEF:
648 /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
649 dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
650 and no complete type for struct foo in that file. */
651 fprintf_filtered (stream, _("<incomplete type>"));
655 error (_("Invalid m2 type code %d in symbol table."), TYPE_CODE (type));