1 /* Support for printing Modula 2 types for GDB, the GNU debugger.
2 Copyright (C) 1986, 1988, 1989, 1991, 1992, 1995, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010
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/>. */
22 #include "gdb_obstack.h"
23 #include "bfd.h" /* Binary File Description */
26 #include "expression.h"
34 #include "typeprint.h"
37 #include "gdb_string.h"
40 static void m2_print_bounds (struct type
*type
,
41 struct ui_file
*stream
, int show
, int level
,
44 static void m2_typedef (struct type
*, struct ui_file
*, int, int);
45 static void m2_array (struct type
*, struct ui_file
*, int, int);
46 static void m2_pointer (struct type
*, struct ui_file
*, int, int);
47 static void m2_ref (struct type
*, struct ui_file
*, int, int);
48 static void m2_procedure (struct type
*, struct ui_file
*, int, int);
49 static void m2_union (struct type
*, struct ui_file
*);
50 static void m2_enum (struct type
*, struct ui_file
*, int, int);
51 static void m2_range (struct type
*, struct ui_file
*, int, int);
52 static void m2_type_name (struct type
*type
, struct ui_file
*stream
);
53 static void m2_short_set (struct type
*type
, struct ui_file
*stream
,
55 static int m2_long_set (struct type
*type
, struct ui_file
*stream
,
57 static int m2_unbounded_array (struct type
*type
, struct ui_file
*stream
,
59 static void m2_record_fields (struct type
*type
, struct ui_file
*stream
,
61 static void m2_unknown (const char *s
, struct type
*type
,
62 struct ui_file
*stream
, int show
, int level
);
64 int m2_is_long_set (struct type
*type
);
65 int m2_is_long_set_of_type (struct type
*type
, struct type
**of_type
);
66 int m2_is_unbounded_array (struct type
*type
);
70 m2_print_type (struct type
*type
, char *varstring
, struct ui_file
*stream
,
83 fputs_filtered (_("<type unknown>"), stream
);
87 code
= TYPE_CODE (type
);
88 switch (TYPE_CODE (type
))
91 m2_short_set(type
, stream
, show
, level
);
94 case TYPE_CODE_STRUCT
:
95 if (m2_long_set (type
, stream
, show
, level
)
96 || m2_unbounded_array (type
, stream
, show
, level
))
98 m2_record_fields (type
, stream
, show
, level
);
101 case TYPE_CODE_TYPEDEF
:
102 m2_typedef (type
, stream
, show
, level
);
105 case TYPE_CODE_ARRAY
:
106 m2_array (type
, stream
, show
, level
);
110 m2_pointer (type
, stream
, show
, level
);
114 m2_ref (type
, stream
, show
, level
);
117 case TYPE_CODE_METHOD
:
118 m2_unknown (_("method"), type
, stream
, show
, level
);
122 m2_procedure (type
, stream
, show
, level
);
125 case TYPE_CODE_UNION
:
126 m2_union (type
, stream
);
130 m2_enum (type
, stream
, show
, level
);
136 case TYPE_CODE_UNDEF
:
137 /* i18n: Do not translate the "struct" part! */
138 m2_unknown (_("undef"), type
, stream
, show
, level
);
141 case TYPE_CODE_ERROR
:
142 m2_unknown (_("error"), type
, stream
, show
, level
);
145 case TYPE_CODE_RANGE
:
146 m2_range (type
, stream
, show
, level
);
149 case TYPE_CODE_TEMPLATE
:
153 m2_type_name (type
, stream
);
158 /* Print a typedef using M2 syntax. TYPE is the underlying type.
159 NEW_SYMBOL is the symbol naming the type. STREAM is the stream on
163 m2_print_typedef (struct type
*type
, struct symbol
*new_symbol
,
164 struct ui_file
*stream
)
166 CHECK_TYPEDEF (type
);
167 fprintf_filtered (stream
, "TYPE ");
168 if (!TYPE_NAME (SYMBOL_TYPE (new_symbol
))
169 || strcmp (TYPE_NAME ((SYMBOL_TYPE (new_symbol
))),
170 SYMBOL_LINKAGE_NAME (new_symbol
)) != 0)
171 fprintf_filtered (stream
, "%s = ", SYMBOL_PRINT_NAME (new_symbol
));
173 fprintf_filtered (stream
, "<builtin> = ");
174 type_print (type
, "", stream
, 0);
175 fprintf_filtered (stream
, ";\n");
178 /* m2_type_name - if a, type, has a name then print it. */
181 m2_type_name (struct type
*type
, struct ui_file
*stream
)
183 if (TYPE_NAME (type
) != NULL
)
184 fputs_filtered (TYPE_NAME (type
), stream
);
187 /* m2_range - displays a Modula-2 subrange type. */
190 m2_range (struct type
*type
, struct ui_file
*stream
, int show
,
193 if (TYPE_HIGH_BOUND (type
) == TYPE_LOW_BOUND (type
))
194 m2_print_type (TYPE_DOMAIN_TYPE (type
), "", stream
, show
, level
);
197 struct type
*target
= TYPE_TARGET_TYPE (type
);
199 fprintf_filtered (stream
, "[");
200 print_type_scalar (target
, TYPE_LOW_BOUND (type
), stream
);
201 fprintf_filtered (stream
, "..");
202 print_type_scalar (target
, TYPE_HIGH_BOUND (type
), stream
);
203 fprintf_filtered (stream
, "]");
208 m2_typedef (struct type
*type
, struct ui_file
*stream
, int show
,
211 if (TYPE_NAME (type
) != NULL
)
213 fputs_filtered (TYPE_NAME (type
), stream
);
214 fputs_filtered (" = ", stream
);
216 m2_print_type (TYPE_TARGET_TYPE (type
), "", stream
, show
, level
);
219 /* m2_array - prints out a Modula-2 ARRAY ... OF type. */
221 static void m2_array (struct type
*type
, struct ui_file
*stream
,
224 fprintf_filtered (stream
, "ARRAY [");
225 if (TYPE_LENGTH (TYPE_TARGET_TYPE (type
)) > 0
226 && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type
))
228 if (TYPE_INDEX_TYPE (type
) != 0)
230 m2_print_bounds (TYPE_INDEX_TYPE (type
), stream
, show
, -1, 0);
231 fprintf_filtered (stream
, "..");
232 m2_print_bounds (TYPE_INDEX_TYPE (type
), stream
, show
, -1, 1);
235 fprintf_filtered (stream
, "%d",
237 / TYPE_LENGTH (TYPE_TARGET_TYPE (type
))));
239 fprintf_filtered (stream
, "] OF ");
240 m2_print_type (TYPE_TARGET_TYPE (type
), "", stream
, show
, level
);
244 m2_pointer (struct type
*type
, struct ui_file
*stream
, int show
,
247 if (TYPE_CONST (type
))
248 fprintf_filtered (stream
, "[...] : ");
250 fprintf_filtered (stream
, "POINTER TO ");
252 m2_print_type (TYPE_TARGET_TYPE (type
), "", stream
, show
, level
);
256 m2_ref (struct type
*type
, struct ui_file
*stream
, int show
,
259 fprintf_filtered (stream
, "VAR");
260 m2_print_type (TYPE_TARGET_TYPE (type
), "", stream
, show
, level
);
264 m2_unknown (const char *s
, struct type
*type
, struct ui_file
*stream
,
267 fprintf_filtered (stream
, "%s %s", s
, _("is unknown"));
270 static void m2_union (struct type
*type
, struct ui_file
*stream
)
272 fprintf_filtered (stream
, "union");
276 m2_procedure (struct type
*type
, struct ui_file
*stream
,
279 fprintf_filtered (stream
, "PROCEDURE ");
280 m2_type_name (type
, stream
);
281 if (TYPE_CODE (TYPE_TARGET_TYPE (type
)) != TYPE_CODE_VOID
)
283 int i
, len
= TYPE_NFIELDS (type
);
285 fprintf_filtered (stream
, " (");
286 for (i
= 0; i
< len
; i
++)
290 fputs_filtered (", ", stream
);
293 m2_print_type (TYPE_FIELD_TYPE (type
, i
), "", stream
, -1, 0);
295 if (TYPE_TARGET_TYPE (type
) != NULL
)
297 fprintf_filtered (stream
, " : ");
298 m2_print_type (TYPE_TARGET_TYPE (type
), "", stream
, 0, 0);
304 m2_print_bounds (struct type
*type
,
305 struct ui_file
*stream
, int show
, int level
,
308 struct type
*target
= TYPE_TARGET_TYPE (type
);
310 if (TYPE_NFIELDS(type
) == 0)
314 print_type_scalar (target
, TYPE_HIGH_BOUND (type
), stream
);
316 print_type_scalar (target
, TYPE_LOW_BOUND (type
), stream
);
320 m2_short_set (struct type
*type
, struct ui_file
*stream
, int show
, int level
)
322 fprintf_filtered(stream
, "SET [");
323 m2_print_bounds (TYPE_INDEX_TYPE (type
), stream
,
326 fprintf_filtered(stream
, "..");
327 m2_print_bounds (TYPE_INDEX_TYPE (type
), stream
,
329 fprintf_filtered(stream
, "]");
333 m2_is_long_set (struct type
*type
)
335 LONGEST previous_high
= 0; /* unnecessary initialization
336 keeps gcc -Wall happy */
340 if (TYPE_CODE (type
) == TYPE_CODE_STRUCT
)
343 /* check if all fields of the RECORD are consecutive sets. */
345 len
= TYPE_NFIELDS (type
);
346 for (i
= TYPE_N_BASECLASSES (type
); i
< len
; i
++)
348 if (TYPE_FIELD_TYPE (type
, i
) == NULL
)
350 if (TYPE_CODE (TYPE_FIELD_TYPE (type
, i
)) != TYPE_CODE_SET
)
352 if (TYPE_FIELD_NAME (type
, i
) != NULL
353 && (strcmp (TYPE_FIELD_NAME (type
, i
), "") != 0))
355 range
= TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type
, i
));
356 if ((i
> TYPE_N_BASECLASSES (type
))
357 && previous_high
+ 1 != TYPE_LOW_BOUND (range
))
359 previous_high
= TYPE_HIGH_BOUND (range
);
366 /* m2_get_discrete_bounds - a wrapper for get_discrete_bounds which
367 understands that CHARs might be signed.
368 This should be integrated into gdbtypes.c
369 inside get_discrete_bounds. */
372 m2_get_discrete_bounds (struct type
*type
, LONGEST
*lowp
, LONGEST
*highp
)
374 CHECK_TYPEDEF (type
);
375 switch (TYPE_CODE (type
))
378 if (TYPE_LENGTH (type
) < sizeof (LONGEST
))
380 if (!TYPE_UNSIGNED (type
))
382 *lowp
= -(1 << (TYPE_LENGTH (type
) * TARGET_CHAR_BIT
- 1));
389 return get_discrete_bounds (type
, lowp
, highp
);
393 /* m2_is_long_set_of_type - returns TRUE if the long set was declared as
394 SET OF <oftype> of_type is assigned to the
398 m2_is_long_set_of_type (struct type
*type
, struct type
**of_type
)
406 if (TYPE_CODE (type
) == TYPE_CODE_STRUCT
)
408 len
= TYPE_NFIELDS (type
);
409 i
= TYPE_N_BASECLASSES (type
);
412 range
= TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type
, i
));
413 target
= TYPE_TARGET_TYPE (range
);
415 l1
= TYPE_LOW_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type
, i
)));
416 h1
= TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type
, len
-1)));
418 if (m2_get_discrete_bounds (target
, &l2
, &h2
) >= 0)
419 return (l1
== l2
&& h1
== h2
);
420 error (_("long_set failed to find discrete bounds for its subtype"));
423 error (_("expecting long_set"));
428 m2_long_set (struct type
*type
, struct ui_file
*stream
, int show
, int level
)
430 struct type
*index_type
;
431 struct type
*range_type
;
432 struct type
*of_type
;
434 int len
= TYPE_NFIELDS (type
);
438 if (m2_is_long_set (type
))
440 if (TYPE_TAG_NAME (type
) != NULL
)
442 fputs_filtered (TYPE_TAG_NAME (type
), stream
);
446 else if (TYPE_NAME (type
) != NULL
)
448 fputs_filtered (TYPE_NAME (type
), stream
);
453 if (TYPE_TAG_NAME (type
) != NULL
|| TYPE_NAME (type
) != NULL
)
454 fputs_filtered (" = ", stream
);
456 if (get_long_set_bounds (type
, &low
, &high
))
458 fprintf_filtered(stream
, "SET OF ");
459 i
= TYPE_N_BASECLASSES (type
);
460 if (m2_is_long_set_of_type (type
, &of_type
))
461 m2_print_type (of_type
, "", stream
, show
- 1, level
);
464 fprintf_filtered(stream
, "[");
465 m2_print_bounds (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type
, i
)),
466 stream
, show
- 1, level
, 0);
468 fprintf_filtered(stream
, "..");
470 m2_print_bounds (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type
, len
-1)),
471 stream
, show
- 1, level
, 1);
472 fprintf_filtered(stream
, "]");
476 /* i18n: Do not translate the "SET OF" part! */
477 fprintf_filtered(stream
, _("SET OF <unknown>"));
484 /* m2_is_unbounded_array - returns TRUE if, type, should be regarded
485 as a Modula-2 unbounded ARRAY type. */
488 m2_is_unbounded_array (struct type
*type
)
490 if (TYPE_CODE (type
) == TYPE_CODE_STRUCT
)
493 * check if we have a structure with exactly two fields named
494 * _m2_contents and _m2_high. It also checks to see if the
495 * type of _m2_contents is a pointer. The TYPE_TARGET_TYPE
496 * of the pointer determines the unbounded ARRAY OF type.
498 if (TYPE_NFIELDS (type
) != 2)
500 if (strcmp (TYPE_FIELD_NAME (type
, 0), "_m2_contents") != 0)
502 if (strcmp (TYPE_FIELD_NAME (type
, 1), "_m2_high") != 0)
504 if (TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) != TYPE_CODE_PTR
)
511 /* m2_unbounded_array - if the struct type matches a Modula-2 unbounded
512 parameter type then display the type as an
513 ARRAY OF type. Returns TRUE if an unbounded
514 array type was detected. */
517 m2_unbounded_array (struct type
*type
, struct ui_file
*stream
, int show
,
520 if (m2_is_unbounded_array (type
))
524 fputs_filtered ("ARRAY OF ", stream
);
525 m2_print_type (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
, 0)),
526 "", stream
, 0, level
);
534 m2_record_fields (struct type
*type
, struct ui_file
*stream
, int show
,
537 /* Print the tag if it exists. */
538 if (TYPE_TAG_NAME (type
) != NULL
)
540 if (strncmp (TYPE_TAG_NAME (type
), "$$", 2) != 0)
542 fputs_filtered (TYPE_TAG_NAME (type
), stream
);
544 fprintf_filtered (stream
, " = ");
550 if (TYPE_CODE (type
) == TYPE_CODE_STRUCT
)
551 fprintf_filtered (stream
, "RECORD ... END ");
552 else if (TYPE_CODE (type
) == TYPE_CODE_UNION
)
553 fprintf_filtered (stream
, "CASE ... END ");
558 int len
= TYPE_NFIELDS (type
);
560 if (TYPE_CODE (type
) == TYPE_CODE_STRUCT
)
561 fprintf_filtered (stream
, "RECORD\n");
562 else if (TYPE_CODE (type
) == TYPE_CODE_UNION
)
563 /* i18n: Do not translate "CASE" and "OF" */
564 fprintf_filtered (stream
, _("CASE <variant> OF\n"));
566 for (i
= TYPE_N_BASECLASSES (type
); i
< len
; i
++)
570 print_spaces_filtered (level
+ 4, stream
);
571 fputs_filtered (TYPE_FIELD_NAME (type
, i
), stream
);
572 fputs_filtered (" : ", stream
);
573 m2_print_type (TYPE_FIELD_TYPE (type
, i
),
575 stream
, 0, level
+ 4);
576 if (TYPE_FIELD_PACKED (type
, i
))
578 /* It is a bitfield. This code does not attempt
579 to look at the bitpos and reconstruct filler,
580 unnamed fields. This would lead to misleading
581 results if the compiler does not put out fields
582 for such things (I don't know what it does). */
583 fprintf_filtered (stream
, " : %d",
584 TYPE_FIELD_BITSIZE (type
, i
));
586 fprintf_filtered (stream
, ";\n");
589 fprintfi_filtered (level
, stream
, "END ");
594 m2_enum (struct type
*type
, struct ui_file
*stream
, int show
, int level
)
600 /* If we just printed a tag name, no need to print anything else. */
601 if (TYPE_TAG_NAME (type
) == NULL
)
602 fprintf_filtered (stream
, "(...)");
604 else if (show
> 0 || TYPE_TAG_NAME (type
) == NULL
)
606 fprintf_filtered (stream
, "(");
607 len
= TYPE_NFIELDS (type
);
609 for (i
= 0; i
< len
; i
++)
613 fprintf_filtered (stream
, ", ");
615 fputs_filtered (TYPE_FIELD_NAME (type
, i
), stream
);
616 if (lastval
!= TYPE_FIELD_BITPOS (type
, i
))
618 fprintf_filtered (stream
, " = %d", TYPE_FIELD_BITPOS (type
, i
));
619 lastval
= TYPE_FIELD_BITPOS (type
, i
);
623 fprintf_filtered (stream
, ")");
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