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 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);
38 /* Print function pointer with inferior address ADDRESS onto stdio
42 print_function_pointer_address (CORE_ADDR address, struct ui_file *stream)
44 CORE_ADDR func_addr = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
48 /* If the function pointer is represented by a description, print the
49 address of the description. */
50 if (addressprint && func_addr != address)
52 fputs_filtered ("@", stream);
53 fputs_filtered (paddress (address), stream);
54 fputs_filtered (": ", stream);
56 print_address_demangle (func_addr, stream, demangle);
60 * get_long_set_bounds - assigns the bounds of the long set to low and high.
64 get_long_set_bounds (struct type *type, LONGEST *low, LONGEST *high)
68 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
70 len = TYPE_NFIELDS (type);
71 i = TYPE_N_BASECLASSES (type);
74 *low = TYPE_LOW_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)));
75 *high = TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type,
79 error (_("expecting long_set"));
84 m2_print_long_set (struct type *type, const gdb_byte *valaddr,
85 int embedded_offset, CORE_ADDR address,
86 struct ui_file *stream, int format,
87 enum val_prettyprint pretty)
91 LONGEST previous_low = 0;
92 LONGEST previous_high= 0;
93 LONGEST i, low_bound, high_bound;
94 LONGEST field_low, field_high;
100 CHECK_TYPEDEF (type);
102 fprintf_filtered (stream, "{");
103 len = TYPE_NFIELDS (type);
104 if (get_long_set_bounds (type, &low_bound, &high_bound))
106 field = TYPE_N_BASECLASSES (type);
107 range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
111 fprintf_filtered (stream, " %s }", _("<unknown bounds of set>"));
115 target = TYPE_TARGET_TYPE (range);
117 target = builtin_type_int;
119 if (get_discrete_bounds (range, &field_low, &field_high) >= 0)
121 for (i = low_bound; i <= high_bound; i++)
123 bitval = value_bit_index (TYPE_FIELD_TYPE (type, field),
124 (TYPE_FIELD_BITPOS (type, field) / 8) +
125 valaddr + embedded_offset, i);
127 error (_("bit test is out of range"));
134 fprintf_filtered (stream, ", ");
135 print_type_scalar (target, i, stream);
146 if (previous_low+1 < previous_high)
147 fprintf_filtered (stream, "..");
148 if (previous_low+1 < previous_high)
149 print_type_scalar (target, previous_high, stream);
158 range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
159 if (get_discrete_bounds (range, &field_low, &field_high) < 0)
161 target = TYPE_TARGET_TYPE (range);
163 target = builtin_type_int;
168 if (previous_low+1 < previous_high)
170 fprintf_filtered (stream, "..");
171 print_type_scalar (target, previous_high, stream);
175 fprintf_filtered (stream, "}");
180 print_unpacked_pointer (struct type *type,
181 CORE_ADDR address, CORE_ADDR addr,
182 int format, struct ui_file *stream)
184 struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
186 if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
188 /* Try to print what function it points to. */
189 print_function_pointer_address (addr, stream);
190 /* Return value is irrelevant except for string pointers. */
194 if (addressprint && format != 's')
195 fputs_filtered (paddress (address), stream);
197 /* For a pointer to char or unsigned char, also print the string
198 pointed to, unless pointer is null. */
200 if (TYPE_LENGTH (elttype) == 1
201 && TYPE_CODE (elttype) == TYPE_CODE_INT
202 && (format == 0 || format == 's')
204 return val_print_string (addr, -1, TYPE_LENGTH (elttype), stream);
210 print_variable_at_address (struct type *type, const gdb_byte *valaddr,
211 struct ui_file *stream, int format,
212 int deref_ref, int recurse,
213 enum val_prettyprint pretty)
215 CORE_ADDR addr = unpack_pointer (type, valaddr);
216 struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
218 fprintf_filtered (stream, "[");
219 fputs_filtered (paddress (addr), stream);
220 fprintf_filtered (stream, "] : ");
222 if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
224 struct value *deref_val =
226 (TYPE_TARGET_TYPE (type),
227 unpack_pointer (lookup_pointer_type (builtin_type_void),
229 common_val_print (deref_val, stream, format, deref_ref,
233 fputs_filtered ("???", stream);
236 /* Print data of type TYPE located at VALADDR (within GDB), which came from
237 the inferior at address ADDRESS, onto stdio stream STREAM according to
238 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
241 If the data are a string pointer, returns the number of string characters
244 If DEREF_REF is nonzero, then dereference references, otherwise just print
247 The PRETTY parameter controls prettyprinting. */
250 m2_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
251 CORE_ADDR address, struct ui_file *stream, int format,
252 int deref_ref, int recurse, enum val_prettyprint pretty)
254 unsigned int i = 0; /* Number of characters printed */
256 struct type *elttype;
258 int length_pos, length_size, string_pos;
263 CHECK_TYPEDEF (type);
264 switch (TYPE_CODE (type))
266 case TYPE_CODE_ARRAY:
267 if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
269 elttype = check_typedef (TYPE_TARGET_TYPE (type));
270 eltlen = TYPE_LENGTH (elttype);
271 len = TYPE_LENGTH (type) / eltlen;
272 if (prettyprint_arrays)
273 print_spaces_filtered (2 + 2 * recurse, stream);
274 /* For an array of chars, print with string syntax. */
276 ((TYPE_CODE (elttype) == TYPE_CODE_INT)
277 || ((current_language->la_language == language_m2)
278 && (TYPE_CODE (elttype) == TYPE_CODE_CHAR)))
279 && (format == 0 || format == 's'))
281 /* If requested, look for the first null char and only print
282 elements up to it. */
283 if (stop_print_at_null)
285 unsigned int temp_len;
287 /* Look for a NULL char. */
289 (valaddr + embedded_offset)[temp_len]
290 && temp_len < len && temp_len < print_max;
295 LA_PRINT_STRING (stream, valaddr + embedded_offset, len, 1, 0);
300 fprintf_filtered (stream, "{");
301 val_print_array_elements (type, valaddr + embedded_offset,
302 address, stream, format, deref_ref,
304 fprintf_filtered (stream, "}");
308 /* Array of unspecified length: treat like pointer to first elt. */
309 print_unpacked_pointer (type, address, address, format, stream);
313 if (TYPE_CONST (type))
314 print_variable_at_address (type, valaddr + embedded_offset,
315 stream, format, deref_ref, recurse,
317 else if (format && format != 's')
318 print_scalar_formatted (valaddr + embedded_offset, type, format,
322 addr = unpack_pointer (type, valaddr + embedded_offset);
323 print_unpacked_pointer (type, addr, address, format, stream);
328 elttype = check_typedef (TYPE_TARGET_TYPE (type));
332 = extract_typed_address (valaddr + embedded_offset, type);
333 fprintf_filtered (stream, "@");
334 fputs_filtered (paddress (addr), stream);
336 fputs_filtered (": ", stream);
338 /* De-reference the reference. */
341 if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
343 struct value *deref_val =
345 (TYPE_TARGET_TYPE (type),
346 unpack_pointer (lookup_pointer_type (builtin_type_void),
347 valaddr + embedded_offset));
348 common_val_print (deref_val, stream, format, deref_ref,
352 fputs_filtered ("???", stream);
356 case TYPE_CODE_UNION:
357 if (recurse && !unionprint)
359 fprintf_filtered (stream, "{...}");
363 case TYPE_CODE_STRUCT:
364 if (m2_is_long_set (type))
365 m2_print_long_set (type, valaddr, embedded_offset, address,
366 stream, format, pretty);
368 cp_print_value_fields (type, type, valaddr, embedded_offset,
369 address, stream, format,
370 recurse, pretty, NULL, 0);
376 print_scalar_formatted (valaddr + embedded_offset, type,
380 len = TYPE_NFIELDS (type);
381 val = unpack_long (type, valaddr + embedded_offset);
382 for (i = 0; i < len; i++)
385 if (val == TYPE_FIELD_BITPOS (type, i))
392 fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
396 print_longest (stream, 'd', 0, val);
403 print_scalar_formatted (valaddr + embedded_offset, type,
407 /* FIXME, we should consider, at least for ANSI C language, eliminating
408 the distinction made between FUNCs and POINTERs to FUNCs. */
409 fprintf_filtered (stream, "{");
410 type_print (type, "", stream, -1);
411 fprintf_filtered (stream, "} ");
412 /* Try to print what function it points to, and its address. */
413 print_address_demangle (address, stream, demangle);
417 format = format ? format : output_format;
419 print_scalar_formatted (valaddr + embedded_offset, type,
423 val = unpack_long (type, valaddr + embedded_offset);
425 fputs_filtered ("FALSE", stream);
427 fputs_filtered ("TRUE", stream);
429 fprintf_filtered (stream, "%ld)", (long int) val);
433 case TYPE_CODE_RANGE:
434 if (TYPE_LENGTH (type) == TYPE_LENGTH (TYPE_TARGET_TYPE (type)))
436 m2_val_print (TYPE_TARGET_TYPE (type), valaddr, embedded_offset,
437 address, stream, format, deref_ref, recurse, pretty);
440 /* FIXME: create_range_type does not set the unsigned bit in a
441 range type (I think it probably should copy it from the target
442 type), so we won't print values which are too large to
443 fit in a signed integer correctly. */
444 /* FIXME: Doesn't handle ranges of enums correctly. (Can't just
445 print with the target type, though, because the size of our type
446 and the target type might differ). */
450 format = format ? format : output_format;
452 print_scalar_formatted (valaddr + embedded_offset, type, format,
455 val_print_type_code_int (type, valaddr + embedded_offset, stream);
459 format = format ? format : output_format;
461 print_scalar_formatted (valaddr + embedded_offset, type,
465 val = unpack_long (type, valaddr + embedded_offset);
466 if (TYPE_UNSIGNED (type))
467 fprintf_filtered (stream, "%u", (unsigned int) val);
469 fprintf_filtered (stream, "%d", (int) val);
470 fputs_filtered (" ", stream);
471 LA_PRINT_CHAR ((unsigned char) val, stream);
477 print_scalar_formatted (valaddr + embedded_offset, type,
480 print_floating (valaddr + embedded_offset, type, stream);
483 case TYPE_CODE_METHOD:
486 case TYPE_CODE_BITSTRING:
488 elttype = TYPE_INDEX_TYPE (type);
489 CHECK_TYPEDEF (elttype);
490 if (TYPE_STUB (elttype))
492 fprintf_filtered (stream, _("<incomplete type>"));
498 struct type *range = elttype;
499 LONGEST low_bound, high_bound;
501 int is_bitstring = TYPE_CODE (type) == TYPE_CODE_BITSTRING;
505 fputs_filtered ("B'", stream);
507 fputs_filtered ("{", stream);
509 i = get_discrete_bounds (range, &low_bound, &high_bound);
513 fputs_filtered (_("<error value>"), stream);
517 for (i = low_bound; i <= high_bound; i++)
519 int element = value_bit_index (type, valaddr + embedded_offset,
524 goto maybe_bad_bstring;
527 fprintf_filtered (stream, "%d", element);
531 fputs_filtered (", ", stream);
532 print_type_scalar (range, i, stream);
535 if (i + 1 <= high_bound
536 && value_bit_index (type, valaddr + embedded_offset,
540 fputs_filtered ("..", stream);
541 while (i + 1 <= high_bound
542 && value_bit_index (type,
543 valaddr + embedded_offset,
546 print_type_scalar (range, j, stream);
552 fputs_filtered ("'", stream);
554 fputs_filtered ("}", stream);
559 fprintf_filtered (stream, "void");
562 case TYPE_CODE_ERROR:
563 fprintf_filtered (stream, _("<error type>"));
566 case TYPE_CODE_UNDEF:
567 /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
568 dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
569 and no complete type for struct foo in that file. */
570 fprintf_filtered (stream, _("<incomplete type>"));
574 error (_("Invalid m2 type code %d in symbol table."), TYPE_CODE (type));