]> git.ipfire.org Git - thirdparty/binutils-gdb.git/blame - gdb/ada-lang.c
fix -Wshadow warning inside ada-lang.c:assign_aggregate
[thirdparty/binutils-gdb.git] / gdb / ada-lang.c
CommitLineData
197e01b6 1/* Ada language support routines for GDB, the GNU debugger. Copyright (C)
10a2c479 2
ae6a3a4c
TJB
3 1992, 1993, 1994, 1997, 1998, 1999, 2000, 2003, 2004, 2005, 2007, 2008,
4 2009 Free Software Foundation, Inc.
14f9c5c9 5
a9762ec7 6 This file is part of GDB.
14f9c5c9 7
a9762ec7
JB
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.
14f9c5c9 12
a9762ec7
JB
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.
14f9c5c9 17
a9762ec7
JB
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/>. */
14f9c5c9 20
96d887e8 21
4c4b4cd2 22#include "defs.h"
14f9c5c9 23#include <stdio.h>
0c30c098 24#include "gdb_string.h"
14f9c5c9
AS
25#include <ctype.h>
26#include <stdarg.h>
27#include "demangle.h"
4c4b4cd2
PH
28#include "gdb_regex.h"
29#include "frame.h"
14f9c5c9
AS
30#include "symtab.h"
31#include "gdbtypes.h"
32#include "gdbcmd.h"
33#include "expression.h"
34#include "parser-defs.h"
35#include "language.h"
36#include "c-lang.h"
37#include "inferior.h"
38#include "symfile.h"
39#include "objfiles.h"
40#include "breakpoint.h"
41#include "gdbcore.h"
4c4b4cd2
PH
42#include "hashtab.h"
43#include "gdb_obstack.h"
14f9c5c9 44#include "ada-lang.h"
4c4b4cd2
PH
45#include "completer.h"
46#include "gdb_stat.h"
47#ifdef UI_OUT
14f9c5c9 48#include "ui-out.h"
4c4b4cd2 49#endif
fe898f56 50#include "block.h"
04714b91 51#include "infcall.h"
de4f826b 52#include "dictionary.h"
60250e8b 53#include "exceptions.h"
f7f9143b
JB
54#include "annotate.h"
55#include "valprint.h"
9bbc9174 56#include "source.h"
0259addd 57#include "observer.h"
2ba95b9b 58#include "vec.h"
692465f1 59#include "stack.h"
14f9c5c9 60
ccefe4c4 61#include "psymtab.h"
40bc484c 62#include "value.h"
956a9fb9 63#include "mi/mi-common.h"
9ac4176b 64#include "arch-utils.h"
28010a5d 65#include "exceptions.h"
ccefe4c4 66
4c4b4cd2 67/* Define whether or not the C operator '/' truncates towards zero for
0963b4bd 68 differently signed operands (truncation direction is undefined in C).
4c4b4cd2
PH
69 Copied from valarith.c. */
70
71#ifndef TRUNCATION_TOWARDS_ZERO
72#define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2)
73#endif
74
d2e4a39e 75static struct type *desc_base_type (struct type *);
14f9c5c9 76
d2e4a39e 77static struct type *desc_bounds_type (struct type *);
14f9c5c9 78
d2e4a39e 79static struct value *desc_bounds (struct value *);
14f9c5c9 80
d2e4a39e 81static int fat_pntr_bounds_bitpos (struct type *);
14f9c5c9 82
d2e4a39e 83static int fat_pntr_bounds_bitsize (struct type *);
14f9c5c9 84
556bdfd4 85static struct type *desc_data_target_type (struct type *);
14f9c5c9 86
d2e4a39e 87static struct value *desc_data (struct value *);
14f9c5c9 88
d2e4a39e 89static int fat_pntr_data_bitpos (struct type *);
14f9c5c9 90
d2e4a39e 91static int fat_pntr_data_bitsize (struct type *);
14f9c5c9 92
d2e4a39e 93static struct value *desc_one_bound (struct value *, int, int);
14f9c5c9 94
d2e4a39e 95static int desc_bound_bitpos (struct type *, int, int);
14f9c5c9 96
d2e4a39e 97static int desc_bound_bitsize (struct type *, int, int);
14f9c5c9 98
d2e4a39e 99static struct type *desc_index_type (struct type *, int);
14f9c5c9 100
d2e4a39e 101static int desc_arity (struct type *);
14f9c5c9 102
d2e4a39e 103static int ada_type_match (struct type *, struct type *, int);
14f9c5c9 104
d2e4a39e 105static int ada_args_match (struct symbol *, struct value **, int);
14f9c5c9 106
40658b94
PH
107static int full_match (const char *, const char *);
108
40bc484c 109static struct value *make_array_descriptor (struct type *, struct value *);
14f9c5c9 110
4c4b4cd2 111static void ada_add_block_symbols (struct obstack *,
76a01679 112 struct block *, const char *,
2570f2b7 113 domain_enum, struct objfile *, int);
14f9c5c9 114
4c4b4cd2 115static int is_nonfunction (struct ada_symbol_info *, int);
14f9c5c9 116
76a01679 117static void add_defn_to_vec (struct obstack *, struct symbol *,
2570f2b7 118 struct block *);
14f9c5c9 119
4c4b4cd2
PH
120static int num_defns_collected (struct obstack *);
121
122static struct ada_symbol_info *defns_collected (struct obstack *, int);
14f9c5c9 123
4c4b4cd2 124static struct value *resolve_subexp (struct expression **, int *, int,
76a01679 125 struct type *);
14f9c5c9 126
d2e4a39e 127static void replace_operator_with_call (struct expression **, int, int, int,
4c4b4cd2 128 struct symbol *, struct block *);
14f9c5c9 129
d2e4a39e 130static int possible_user_operator_p (enum exp_opcode, struct value **);
14f9c5c9 131
4c4b4cd2
PH
132static char *ada_op_name (enum exp_opcode);
133
134static const char *ada_decoded_op_name (enum exp_opcode);
14f9c5c9 135
d2e4a39e 136static int numeric_type_p (struct type *);
14f9c5c9 137
d2e4a39e 138static int integer_type_p (struct type *);
14f9c5c9 139
d2e4a39e 140static int scalar_type_p (struct type *);
14f9c5c9 141
d2e4a39e 142static int discrete_type_p (struct type *);
14f9c5c9 143
aeb5907d
JB
144static enum ada_renaming_category parse_old_style_renaming (struct type *,
145 const char **,
146 int *,
147 const char **);
148
149static struct symbol *find_old_style_renaming_symbol (const char *,
150 struct block *);
151
4c4b4cd2 152static struct type *ada_lookup_struct_elt_type (struct type *, char *,
76a01679 153 int, int, int *);
4c4b4cd2 154
d2e4a39e 155static struct value *evaluate_subexp_type (struct expression *, int *);
14f9c5c9 156
b4ba55a1
JB
157static struct type *ada_find_parallel_type_with_name (struct type *,
158 const char *);
159
d2e4a39e 160static int is_dynamic_field (struct type *, int);
14f9c5c9 161
10a2c479 162static struct type *to_fixed_variant_branch_type (struct type *,
fc1a4b47 163 const gdb_byte *,
4c4b4cd2
PH
164 CORE_ADDR, struct value *);
165
166static struct type *to_fixed_array_type (struct type *, struct value *, int);
14f9c5c9 167
28c85d6c 168static struct type *to_fixed_range_type (struct type *, struct value *);
14f9c5c9 169
d2e4a39e 170static struct type *to_static_fixed_type (struct type *);
f192137b 171static struct type *static_unwrap_type (struct type *type);
14f9c5c9 172
d2e4a39e 173static struct value *unwrap_value (struct value *);
14f9c5c9 174
ad82864c 175static struct type *constrained_packed_array_type (struct type *, long *);
14f9c5c9 176
ad82864c 177static struct type *decode_constrained_packed_array_type (struct type *);
14f9c5c9 178
ad82864c
JB
179static long decode_packed_array_bitsize (struct type *);
180
181static struct value *decode_constrained_packed_array (struct value *);
182
183static int ada_is_packed_array_type (struct type *);
184
185static int ada_is_unconstrained_packed_array_type (struct type *);
14f9c5c9 186
d2e4a39e 187static struct value *value_subscript_packed (struct value *, int,
4c4b4cd2 188 struct value **);
14f9c5c9 189
50810684 190static void move_bits (gdb_byte *, int, const gdb_byte *, int, int, int);
52ce6436 191
4c4b4cd2
PH
192static struct value *coerce_unspec_val_to_type (struct value *,
193 struct type *);
14f9c5c9 194
d2e4a39e 195static struct value *get_var_value (char *, char *);
14f9c5c9 196
d2e4a39e 197static int lesseq_defined_than (struct symbol *, struct symbol *);
14f9c5c9 198
d2e4a39e 199static int equiv_types (struct type *, struct type *);
14f9c5c9 200
d2e4a39e 201static int is_name_suffix (const char *);
14f9c5c9 202
73589123
PH
203static int advance_wild_match (const char **, const char *, int);
204
205static int wild_match (const char *, const char *);
14f9c5c9 206
d2e4a39e 207static struct value *ada_coerce_ref (struct value *);
14f9c5c9 208
4c4b4cd2
PH
209static LONGEST pos_atr (struct value *);
210
3cb382c9 211static struct value *value_pos_atr (struct type *, struct value *);
14f9c5c9 212
d2e4a39e 213static struct value *value_val_atr (struct type *, struct value *);
14f9c5c9 214
4c4b4cd2
PH
215static struct symbol *standard_lookup (const char *, const struct block *,
216 domain_enum);
14f9c5c9 217
4c4b4cd2
PH
218static struct value *ada_search_struct_field (char *, struct value *, int,
219 struct type *);
220
221static struct value *ada_value_primitive_field (struct value *, int, int,
222 struct type *);
223
76a01679 224static int find_struct_field (char *, struct type *, int,
52ce6436 225 struct type **, int *, int *, int *, int *);
4c4b4cd2
PH
226
227static struct value *ada_to_fixed_value_create (struct type *, CORE_ADDR,
228 struct value *);
229
4c4b4cd2
PH
230static int ada_resolve_function (struct ada_symbol_info *, int,
231 struct value **, int, const char *,
232 struct type *);
233
4c4b4cd2
PH
234static int ada_is_direct_array_type (struct type *);
235
72d5681a
PH
236static void ada_language_arch_info (struct gdbarch *,
237 struct language_arch_info *);
714e53ab
PH
238
239static void check_size (const struct type *);
52ce6436
PH
240
241static struct value *ada_index_struct_field (int, struct value *, int,
242 struct type *);
243
244static struct value *assign_aggregate (struct value *, struct value *,
0963b4bd
MS
245 struct expression *,
246 int *, enum noside);
52ce6436
PH
247
248static void aggregate_assign_from_choices (struct value *, struct value *,
249 struct expression *,
250 int *, LONGEST *, int *,
251 int, LONGEST, LONGEST);
252
253static void aggregate_assign_positional (struct value *, struct value *,
254 struct expression *,
255 int *, LONGEST *, int *, int,
256 LONGEST, LONGEST);
257
258
259static void aggregate_assign_others (struct value *, struct value *,
260 struct expression *,
261 int *, LONGEST *, int, LONGEST, LONGEST);
262
263
264static void add_component_interval (LONGEST, LONGEST, LONGEST *, int *, int);
265
266
267static struct value *ada_evaluate_subexp (struct type *, struct expression *,
268 int *, enum noside);
269
270static void ada_forward_operator_length (struct expression *, int, int *,
271 int *);
4c4b4cd2
PH
272\f
273
76a01679 274
4c4b4cd2 275/* Maximum-sized dynamic type. */
14f9c5c9
AS
276static unsigned int varsize_limit;
277
4c4b4cd2
PH
278/* FIXME: brobecker/2003-09-17: No longer a const because it is
279 returned by a function that does not return a const char *. */
280static char *ada_completer_word_break_characters =
281#ifdef VMS
282 " \t\n!@#%^&*()+=|~`}{[]\";:?/,-";
283#else
14f9c5c9 284 " \t\n!@#$%^&*()+=|~`}{[]\";:?/,-";
4c4b4cd2 285#endif
14f9c5c9 286
4c4b4cd2 287/* The name of the symbol to use to get the name of the main subprogram. */
76a01679 288static const char ADA_MAIN_PROGRAM_SYMBOL_NAME[]
4c4b4cd2 289 = "__gnat_ada_main_program_name";
14f9c5c9 290
4c4b4cd2
PH
291/* Limit on the number of warnings to raise per expression evaluation. */
292static int warning_limit = 2;
293
294/* Number of warning messages issued; reset to 0 by cleanups after
295 expression evaluation. */
296static int warnings_issued = 0;
297
298static const char *known_runtime_file_name_patterns[] = {
299 ADA_KNOWN_RUNTIME_FILE_NAME_PATTERNS NULL
300};
301
302static const char *known_auxiliary_function_name_patterns[] = {
303 ADA_KNOWN_AUXILIARY_FUNCTION_NAME_PATTERNS NULL
304};
305
306/* Space for allocating results of ada_lookup_symbol_list. */
307static struct obstack symbol_list_obstack;
308
e802dbe0
JB
309 /* Inferior-specific data. */
310
311/* Per-inferior data for this module. */
312
313struct ada_inferior_data
314{
315 /* The ada__tags__type_specific_data type, which is used when decoding
316 tagged types. With older versions of GNAT, this type was directly
317 accessible through a component ("tsd") in the object tag. But this
318 is no longer the case, so we cache it for each inferior. */
319 struct type *tsd_type;
320};
321
322/* Our key to this module's inferior data. */
323static const struct inferior_data *ada_inferior_data;
324
325/* A cleanup routine for our inferior data. */
326static void
327ada_inferior_data_cleanup (struct inferior *inf, void *arg)
328{
329 struct ada_inferior_data *data;
330
331 data = inferior_data (inf, ada_inferior_data);
332 if (data != NULL)
333 xfree (data);
334}
335
336/* Return our inferior data for the given inferior (INF).
337
338 This function always returns a valid pointer to an allocated
339 ada_inferior_data structure. If INF's inferior data has not
340 been previously set, this functions creates a new one with all
341 fields set to zero, sets INF's inferior to it, and then returns
342 a pointer to that newly allocated ada_inferior_data. */
343
344static struct ada_inferior_data *
345get_ada_inferior_data (struct inferior *inf)
346{
347 struct ada_inferior_data *data;
348
349 data = inferior_data (inf, ada_inferior_data);
350 if (data == NULL)
351 {
352 data = XZALLOC (struct ada_inferior_data);
353 set_inferior_data (inf, ada_inferior_data, data);
354 }
355
356 return data;
357}
358
359/* Perform all necessary cleanups regarding our module's inferior data
360 that is required after the inferior INF just exited. */
361
362static void
363ada_inferior_exit (struct inferior *inf)
364{
365 ada_inferior_data_cleanup (inf, NULL);
366 set_inferior_data (inf, ada_inferior_data, NULL);
367}
368
4c4b4cd2
PH
369 /* Utilities */
370
720d1a40 371/* If TYPE is a TYPE_CODE_TYPEDEF type, return the target type after
eed9788b 372 all typedef layers have been peeled. Otherwise, return TYPE.
720d1a40
JB
373
374 Normally, we really expect a typedef type to only have 1 typedef layer.
375 In other words, we really expect the target type of a typedef type to be
376 a non-typedef type. This is particularly true for Ada units, because
377 the language does not have a typedef vs not-typedef distinction.
378 In that respect, the Ada compiler has been trying to eliminate as many
379 typedef definitions in the debugging information, since they generally
380 do not bring any extra information (we still use typedef under certain
381 circumstances related mostly to the GNAT encoding).
382
383 Unfortunately, we have seen situations where the debugging information
384 generated by the compiler leads to such multiple typedef layers. For
385 instance, consider the following example with stabs:
386
387 .stabs "pck__float_array___XUP:Tt(0,46)=s16P_ARRAY:(0,47)=[...]"[...]
388 .stabs "pck__float_array___XUP:t(0,36)=(0,46)",128,0,6,0
389
390 This is an error in the debugging information which causes type
391 pck__float_array___XUP to be defined twice, and the second time,
392 it is defined as a typedef of a typedef.
393
394 This is on the fringe of legality as far as debugging information is
395 concerned, and certainly unexpected. But it is easy to handle these
396 situations correctly, so we can afford to be lenient in this case. */
397
398static struct type *
399ada_typedef_target_type (struct type *type)
400{
401 while (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
402 type = TYPE_TARGET_TYPE (type);
403 return type;
404}
405
41d27058
JB
406/* Given DECODED_NAME a string holding a symbol name in its
407 decoded form (ie using the Ada dotted notation), returns
408 its unqualified name. */
409
410static const char *
411ada_unqualified_name (const char *decoded_name)
412{
413 const char *result = strrchr (decoded_name, '.');
414
415 if (result != NULL)
416 result++; /* Skip the dot... */
417 else
418 result = decoded_name;
419
420 return result;
421}
422
423/* Return a string starting with '<', followed by STR, and '>'.
424 The result is good until the next call. */
425
426static char *
427add_angle_brackets (const char *str)
428{
429 static char *result = NULL;
430
431 xfree (result);
88c15c34 432 result = xstrprintf ("<%s>", str);
41d27058
JB
433 return result;
434}
96d887e8 435
4c4b4cd2
PH
436static char *
437ada_get_gdb_completer_word_break_characters (void)
438{
439 return ada_completer_word_break_characters;
440}
441
e79af960
JB
442/* Print an array element index using the Ada syntax. */
443
444static void
445ada_print_array_index (struct value *index_value, struct ui_file *stream,
79a45b7d 446 const struct value_print_options *options)
e79af960 447{
79a45b7d 448 LA_VALUE_PRINT (index_value, stream, options);
e79af960
JB
449 fprintf_filtered (stream, " => ");
450}
451
f27cf670 452/* Assuming VECT points to an array of *SIZE objects of size
14f9c5c9 453 ELEMENT_SIZE, grow it to contain at least MIN_SIZE objects,
f27cf670 454 updating *SIZE as necessary and returning the (new) array. */
14f9c5c9 455
f27cf670
AS
456void *
457grow_vect (void *vect, size_t *size, size_t min_size, int element_size)
14f9c5c9 458{
d2e4a39e
AS
459 if (*size < min_size)
460 {
461 *size *= 2;
462 if (*size < min_size)
4c4b4cd2 463 *size = min_size;
f27cf670 464 vect = xrealloc (vect, *size * element_size);
d2e4a39e 465 }
f27cf670 466 return vect;
14f9c5c9
AS
467}
468
469/* True (non-zero) iff TARGET matches FIELD_NAME up to any trailing
4c4b4cd2 470 suffix of FIELD_NAME beginning "___". */
14f9c5c9
AS
471
472static int
ebf56fd3 473field_name_match (const char *field_name, const char *target)
14f9c5c9
AS
474{
475 int len = strlen (target);
5b4ee69b 476
d2e4a39e 477 return
4c4b4cd2
PH
478 (strncmp (field_name, target, len) == 0
479 && (field_name[len] == '\0'
480 || (strncmp (field_name + len, "___", 3) == 0
76a01679
JB
481 && strcmp (field_name + strlen (field_name) - 6,
482 "___XVN") != 0)));
14f9c5c9
AS
483}
484
485
872c8b51
JB
486/* Assuming TYPE is a TYPE_CODE_STRUCT or a TYPE_CODE_TYPDEF to
487 a TYPE_CODE_STRUCT, find the field whose name matches FIELD_NAME,
488 and return its index. This function also handles fields whose name
489 have ___ suffixes because the compiler sometimes alters their name
490 by adding such a suffix to represent fields with certain constraints.
491 If the field could not be found, return a negative number if
492 MAYBE_MISSING is set. Otherwise raise an error. */
4c4b4cd2
PH
493
494int
495ada_get_field_index (const struct type *type, const char *field_name,
496 int maybe_missing)
497{
498 int fieldno;
872c8b51
JB
499 struct type *struct_type = check_typedef ((struct type *) type);
500
501 for (fieldno = 0; fieldno < TYPE_NFIELDS (struct_type); fieldno++)
502 if (field_name_match (TYPE_FIELD_NAME (struct_type, fieldno), field_name))
4c4b4cd2
PH
503 return fieldno;
504
505 if (!maybe_missing)
323e0a4a 506 error (_("Unable to find field %s in struct %s. Aborting"),
872c8b51 507 field_name, TYPE_NAME (struct_type));
4c4b4cd2
PH
508
509 return -1;
510}
511
512/* The length of the prefix of NAME prior to any "___" suffix. */
14f9c5c9
AS
513
514int
d2e4a39e 515ada_name_prefix_len (const char *name)
14f9c5c9
AS
516{
517 if (name == NULL)
518 return 0;
d2e4a39e 519 else
14f9c5c9 520 {
d2e4a39e 521 const char *p = strstr (name, "___");
5b4ee69b 522
14f9c5c9 523 if (p == NULL)
4c4b4cd2 524 return strlen (name);
14f9c5c9 525 else
4c4b4cd2 526 return p - name;
14f9c5c9
AS
527 }
528}
529
4c4b4cd2
PH
530/* Return non-zero if SUFFIX is a suffix of STR.
531 Return zero if STR is null. */
532
14f9c5c9 533static int
d2e4a39e 534is_suffix (const char *str, const char *suffix)
14f9c5c9
AS
535{
536 int len1, len2;
5b4ee69b 537
14f9c5c9
AS
538 if (str == NULL)
539 return 0;
540 len1 = strlen (str);
541 len2 = strlen (suffix);
4c4b4cd2 542 return (len1 >= len2 && strcmp (str + len1 - len2, suffix) == 0);
14f9c5c9
AS
543}
544
4c4b4cd2
PH
545/* The contents of value VAL, treated as a value of type TYPE. The
546 result is an lval in memory if VAL is. */
14f9c5c9 547
d2e4a39e 548static struct value *
4c4b4cd2 549coerce_unspec_val_to_type (struct value *val, struct type *type)
14f9c5c9 550{
61ee279c 551 type = ada_check_typedef (type);
df407dfe 552 if (value_type (val) == type)
4c4b4cd2 553 return val;
d2e4a39e 554 else
14f9c5c9 555 {
4c4b4cd2
PH
556 struct value *result;
557
558 /* Make sure that the object size is not unreasonable before
559 trying to allocate some memory for it. */
714e53ab 560 check_size (type);
4c4b4cd2 561
41e8491f
JK
562 if (value_lazy (val)
563 || TYPE_LENGTH (type) > TYPE_LENGTH (value_type (val)))
564 result = allocate_value_lazy (type);
565 else
566 {
567 result = allocate_value (type);
568 memcpy (value_contents_raw (result), value_contents (val),
569 TYPE_LENGTH (type));
570 }
74bcbdf3 571 set_value_component_location (result, val);
9bbda503
AC
572 set_value_bitsize (result, value_bitsize (val));
573 set_value_bitpos (result, value_bitpos (val));
42ae5230 574 set_value_address (result, value_address (val));
14f9c5c9
AS
575 return result;
576 }
577}
578
fc1a4b47
AC
579static const gdb_byte *
580cond_offset_host (const gdb_byte *valaddr, long offset)
14f9c5c9
AS
581{
582 if (valaddr == NULL)
583 return NULL;
584 else
585 return valaddr + offset;
586}
587
588static CORE_ADDR
ebf56fd3 589cond_offset_target (CORE_ADDR address, long offset)
14f9c5c9
AS
590{
591 if (address == 0)
592 return 0;
d2e4a39e 593 else
14f9c5c9
AS
594 return address + offset;
595}
596
4c4b4cd2
PH
597/* Issue a warning (as for the definition of warning in utils.c, but
598 with exactly one argument rather than ...), unless the limit on the
599 number of warnings has passed during the evaluation of the current
600 expression. */
a2249542 601
77109804
AC
602/* FIXME: cagney/2004-10-10: This function is mimicking the behavior
603 provided by "complaint". */
a0b31db1 604static void lim_warning (const char *format, ...) ATTRIBUTE_PRINTF (1, 2);
77109804 605
14f9c5c9 606static void
a2249542 607lim_warning (const char *format, ...)
14f9c5c9 608{
a2249542 609 va_list args;
a2249542 610
5b4ee69b 611 va_start (args, format);
4c4b4cd2
PH
612 warnings_issued += 1;
613 if (warnings_issued <= warning_limit)
a2249542
MK
614 vwarning (format, args);
615
616 va_end (args);
4c4b4cd2
PH
617}
618
714e53ab
PH
619/* Issue an error if the size of an object of type T is unreasonable,
620 i.e. if it would be a bad idea to allocate a value of this type in
621 GDB. */
622
623static void
624check_size (const struct type *type)
625{
626 if (TYPE_LENGTH (type) > varsize_limit)
323e0a4a 627 error (_("object size is larger than varsize-limit"));
714e53ab
PH
628}
629
0963b4bd 630/* Maximum value of a SIZE-byte signed integer type. */
4c4b4cd2 631static LONGEST
c3e5cd34 632max_of_size (int size)
4c4b4cd2 633{
76a01679 634 LONGEST top_bit = (LONGEST) 1 << (size * 8 - 2);
5b4ee69b 635
76a01679 636 return top_bit | (top_bit - 1);
4c4b4cd2
PH
637}
638
0963b4bd 639/* Minimum value of a SIZE-byte signed integer type. */
4c4b4cd2 640static LONGEST
c3e5cd34 641min_of_size (int size)
4c4b4cd2 642{
c3e5cd34 643 return -max_of_size (size) - 1;
4c4b4cd2
PH
644}
645
0963b4bd 646/* Maximum value of a SIZE-byte unsigned integer type. */
4c4b4cd2 647static ULONGEST
c3e5cd34 648umax_of_size (int size)
4c4b4cd2 649{
76a01679 650 ULONGEST top_bit = (ULONGEST) 1 << (size * 8 - 1);
5b4ee69b 651
76a01679 652 return top_bit | (top_bit - 1);
4c4b4cd2
PH
653}
654
0963b4bd 655/* Maximum value of integral type T, as a signed quantity. */
c3e5cd34
PH
656static LONGEST
657max_of_type (struct type *t)
4c4b4cd2 658{
c3e5cd34
PH
659 if (TYPE_UNSIGNED (t))
660 return (LONGEST) umax_of_size (TYPE_LENGTH (t));
661 else
662 return max_of_size (TYPE_LENGTH (t));
663}
664
0963b4bd 665/* Minimum value of integral type T, as a signed quantity. */
c3e5cd34
PH
666static LONGEST
667min_of_type (struct type *t)
668{
669 if (TYPE_UNSIGNED (t))
670 return 0;
671 else
672 return min_of_size (TYPE_LENGTH (t));
4c4b4cd2
PH
673}
674
675/* The largest value in the domain of TYPE, a discrete type, as an integer. */
43bbcdc2
PH
676LONGEST
677ada_discrete_type_high_bound (struct type *type)
4c4b4cd2 678{
76a01679 679 switch (TYPE_CODE (type))
4c4b4cd2
PH
680 {
681 case TYPE_CODE_RANGE:
690cc4eb 682 return TYPE_HIGH_BOUND (type);
4c4b4cd2 683 case TYPE_CODE_ENUM:
690cc4eb
PH
684 return TYPE_FIELD_BITPOS (type, TYPE_NFIELDS (type) - 1);
685 case TYPE_CODE_BOOL:
686 return 1;
687 case TYPE_CODE_CHAR:
76a01679 688 case TYPE_CODE_INT:
690cc4eb 689 return max_of_type (type);
4c4b4cd2 690 default:
43bbcdc2 691 error (_("Unexpected type in ada_discrete_type_high_bound."));
4c4b4cd2
PH
692 }
693}
694
695/* The largest value in the domain of TYPE, a discrete type, as an integer. */
43bbcdc2
PH
696LONGEST
697ada_discrete_type_low_bound (struct type *type)
4c4b4cd2 698{
76a01679 699 switch (TYPE_CODE (type))
4c4b4cd2
PH
700 {
701 case TYPE_CODE_RANGE:
690cc4eb 702 return TYPE_LOW_BOUND (type);
4c4b4cd2 703 case TYPE_CODE_ENUM:
690cc4eb
PH
704 return TYPE_FIELD_BITPOS (type, 0);
705 case TYPE_CODE_BOOL:
706 return 0;
707 case TYPE_CODE_CHAR:
76a01679 708 case TYPE_CODE_INT:
690cc4eb 709 return min_of_type (type);
4c4b4cd2 710 default:
43bbcdc2 711 error (_("Unexpected type in ada_discrete_type_low_bound."));
4c4b4cd2
PH
712 }
713}
714
715/* The identity on non-range types. For range types, the underlying
76a01679 716 non-range scalar type. */
4c4b4cd2
PH
717
718static struct type *
18af8284 719get_base_type (struct type *type)
4c4b4cd2
PH
720{
721 while (type != NULL && TYPE_CODE (type) == TYPE_CODE_RANGE)
722 {
76a01679
JB
723 if (type == TYPE_TARGET_TYPE (type) || TYPE_TARGET_TYPE (type) == NULL)
724 return type;
4c4b4cd2
PH
725 type = TYPE_TARGET_TYPE (type);
726 }
727 return type;
14f9c5c9 728}
4c4b4cd2 729\f
76a01679 730
4c4b4cd2 731 /* Language Selection */
14f9c5c9
AS
732
733/* If the main program is in Ada, return language_ada, otherwise return LANG
ccefe4c4 734 (the main program is in Ada iif the adainit symbol is found). */
d2e4a39e 735
14f9c5c9 736enum language
ccefe4c4 737ada_update_initial_language (enum language lang)
14f9c5c9 738{
d2e4a39e 739 if (lookup_minimal_symbol ("adainit", (const char *) NULL,
4c4b4cd2
PH
740 (struct objfile *) NULL) != NULL)
741 return language_ada;
14f9c5c9
AS
742
743 return lang;
744}
96d887e8
PH
745
746/* If the main procedure is written in Ada, then return its name.
747 The result is good until the next call. Return NULL if the main
748 procedure doesn't appear to be in Ada. */
749
750char *
751ada_main_name (void)
752{
753 struct minimal_symbol *msym;
f9bc20b9 754 static char *main_program_name = NULL;
6c038f32 755
96d887e8
PH
756 /* For Ada, the name of the main procedure is stored in a specific
757 string constant, generated by the binder. Look for that symbol,
758 extract its address, and then read that string. If we didn't find
759 that string, then most probably the main procedure is not written
760 in Ada. */
761 msym = lookup_minimal_symbol (ADA_MAIN_PROGRAM_SYMBOL_NAME, NULL, NULL);
762
763 if (msym != NULL)
764 {
f9bc20b9
JB
765 CORE_ADDR main_program_name_addr;
766 int err_code;
767
96d887e8
PH
768 main_program_name_addr = SYMBOL_VALUE_ADDRESS (msym);
769 if (main_program_name_addr == 0)
323e0a4a 770 error (_("Invalid address for Ada main program name."));
96d887e8 771
f9bc20b9
JB
772 xfree (main_program_name);
773 target_read_string (main_program_name_addr, &main_program_name,
774 1024, &err_code);
775
776 if (err_code != 0)
777 return NULL;
96d887e8
PH
778 return main_program_name;
779 }
780
781 /* The main procedure doesn't seem to be in Ada. */
782 return NULL;
783}
14f9c5c9 784\f
4c4b4cd2 785 /* Symbols */
d2e4a39e 786
4c4b4cd2
PH
787/* Table of Ada operators and their GNAT-encoded names. Last entry is pair
788 of NULLs. */
14f9c5c9 789
d2e4a39e
AS
790const struct ada_opname_map ada_opname_table[] = {
791 {"Oadd", "\"+\"", BINOP_ADD},
792 {"Osubtract", "\"-\"", BINOP_SUB},
793 {"Omultiply", "\"*\"", BINOP_MUL},
794 {"Odivide", "\"/\"", BINOP_DIV},
795 {"Omod", "\"mod\"", BINOP_MOD},
796 {"Orem", "\"rem\"", BINOP_REM},
797 {"Oexpon", "\"**\"", BINOP_EXP},
798 {"Olt", "\"<\"", BINOP_LESS},
799 {"Ole", "\"<=\"", BINOP_LEQ},
800 {"Ogt", "\">\"", BINOP_GTR},
801 {"Oge", "\">=\"", BINOP_GEQ},
802 {"Oeq", "\"=\"", BINOP_EQUAL},
803 {"One", "\"/=\"", BINOP_NOTEQUAL},
804 {"Oand", "\"and\"", BINOP_BITWISE_AND},
805 {"Oor", "\"or\"", BINOP_BITWISE_IOR},
806 {"Oxor", "\"xor\"", BINOP_BITWISE_XOR},
807 {"Oconcat", "\"&\"", BINOP_CONCAT},
808 {"Oabs", "\"abs\"", UNOP_ABS},
809 {"Onot", "\"not\"", UNOP_LOGICAL_NOT},
810 {"Oadd", "\"+\"", UNOP_PLUS},
811 {"Osubtract", "\"-\"", UNOP_NEG},
812 {NULL, NULL}
14f9c5c9
AS
813};
814
4c4b4cd2
PH
815/* The "encoded" form of DECODED, according to GNAT conventions.
816 The result is valid until the next call to ada_encode. */
817
14f9c5c9 818char *
4c4b4cd2 819ada_encode (const char *decoded)
14f9c5c9 820{
4c4b4cd2
PH
821 static char *encoding_buffer = NULL;
822 static size_t encoding_buffer_size = 0;
d2e4a39e 823 const char *p;
14f9c5c9 824 int k;
d2e4a39e 825
4c4b4cd2 826 if (decoded == NULL)
14f9c5c9
AS
827 return NULL;
828
4c4b4cd2
PH
829 GROW_VECT (encoding_buffer, encoding_buffer_size,
830 2 * strlen (decoded) + 10);
14f9c5c9
AS
831
832 k = 0;
4c4b4cd2 833 for (p = decoded; *p != '\0'; p += 1)
14f9c5c9 834 {
cdc7bb92 835 if (*p == '.')
4c4b4cd2
PH
836 {
837 encoding_buffer[k] = encoding_buffer[k + 1] = '_';
838 k += 2;
839 }
14f9c5c9 840 else if (*p == '"')
4c4b4cd2
PH
841 {
842 const struct ada_opname_map *mapping;
843
844 for (mapping = ada_opname_table;
1265e4aa
JB
845 mapping->encoded != NULL
846 && strncmp (mapping->decoded, p,
847 strlen (mapping->decoded)) != 0; mapping += 1)
4c4b4cd2
PH
848 ;
849 if (mapping->encoded == NULL)
323e0a4a 850 error (_("invalid Ada operator name: %s"), p);
4c4b4cd2
PH
851 strcpy (encoding_buffer + k, mapping->encoded);
852 k += strlen (mapping->encoded);
853 break;
854 }
d2e4a39e 855 else
4c4b4cd2
PH
856 {
857 encoding_buffer[k] = *p;
858 k += 1;
859 }
14f9c5c9
AS
860 }
861
4c4b4cd2
PH
862 encoding_buffer[k] = '\0';
863 return encoding_buffer;
14f9c5c9
AS
864}
865
866/* Return NAME folded to lower case, or, if surrounded by single
4c4b4cd2
PH
867 quotes, unfolded, but with the quotes stripped away. Result good
868 to next call. */
869
d2e4a39e
AS
870char *
871ada_fold_name (const char *name)
14f9c5c9 872{
d2e4a39e 873 static char *fold_buffer = NULL;
14f9c5c9
AS
874 static size_t fold_buffer_size = 0;
875
876 int len = strlen (name);
d2e4a39e 877 GROW_VECT (fold_buffer, fold_buffer_size, len + 1);
14f9c5c9
AS
878
879 if (name[0] == '\'')
880 {
d2e4a39e
AS
881 strncpy (fold_buffer, name + 1, len - 2);
882 fold_buffer[len - 2] = '\000';
14f9c5c9
AS
883 }
884 else
885 {
886 int i;
5b4ee69b 887
14f9c5c9 888 for (i = 0; i <= len; i += 1)
4c4b4cd2 889 fold_buffer[i] = tolower (name[i]);
14f9c5c9
AS
890 }
891
892 return fold_buffer;
893}
894
529cad9c
PH
895/* Return nonzero if C is either a digit or a lowercase alphabet character. */
896
897static int
898is_lower_alphanum (const char c)
899{
900 return (isdigit (c) || (isalpha (c) && islower (c)));
901}
902
c90092fe
JB
903/* ENCODED is the linkage name of a symbol and LEN contains its length.
904 This function saves in LEN the length of that same symbol name but
905 without either of these suffixes:
29480c32
JB
906 . .{DIGIT}+
907 . ${DIGIT}+
908 . ___{DIGIT}+
909 . __{DIGIT}+.
c90092fe 910
29480c32
JB
911 These are suffixes introduced by the compiler for entities such as
912 nested subprogram for instance, in order to avoid name clashes.
913 They do not serve any purpose for the debugger. */
914
915static void
916ada_remove_trailing_digits (const char *encoded, int *len)
917{
918 if (*len > 1 && isdigit (encoded[*len - 1]))
919 {
920 int i = *len - 2;
5b4ee69b 921
29480c32
JB
922 while (i > 0 && isdigit (encoded[i]))
923 i--;
924 if (i >= 0 && encoded[i] == '.')
925 *len = i;
926 else if (i >= 0 && encoded[i] == '$')
927 *len = i;
928 else if (i >= 2 && strncmp (encoded + i - 2, "___", 3) == 0)
929 *len = i - 2;
930 else if (i >= 1 && strncmp (encoded + i - 1, "__", 2) == 0)
931 *len = i - 1;
932 }
933}
934
935/* Remove the suffix introduced by the compiler for protected object
936 subprograms. */
937
938static void
939ada_remove_po_subprogram_suffix (const char *encoded, int *len)
940{
941 /* Remove trailing N. */
942
943 /* Protected entry subprograms are broken into two
944 separate subprograms: The first one is unprotected, and has
945 a 'N' suffix; the second is the protected version, and has
0963b4bd 946 the 'P' suffix. The second calls the first one after handling
29480c32
JB
947 the protection. Since the P subprograms are internally generated,
948 we leave these names undecoded, giving the user a clue that this
949 entity is internal. */
950
951 if (*len > 1
952 && encoded[*len - 1] == 'N'
953 && (isdigit (encoded[*len - 2]) || islower (encoded[*len - 2])))
954 *len = *len - 1;
955}
956
69fadcdf
JB
957/* Remove trailing X[bn]* suffixes (indicating names in package bodies). */
958
959static void
960ada_remove_Xbn_suffix (const char *encoded, int *len)
961{
962 int i = *len - 1;
963
964 while (i > 0 && (encoded[i] == 'b' || encoded[i] == 'n'))
965 i--;
966
967 if (encoded[i] != 'X')
968 return;
969
970 if (i == 0)
971 return;
972
973 if (isalnum (encoded[i-1]))
974 *len = i;
975}
976
29480c32
JB
977/* If ENCODED follows the GNAT entity encoding conventions, then return
978 the decoded form of ENCODED. Otherwise, return "<%s>" where "%s" is
979 replaced by ENCODED.
14f9c5c9 980
4c4b4cd2 981 The resulting string is valid until the next call of ada_decode.
29480c32 982 If the string is unchanged by decoding, the original string pointer
4c4b4cd2
PH
983 is returned. */
984
985const char *
986ada_decode (const char *encoded)
14f9c5c9
AS
987{
988 int i, j;
989 int len0;
d2e4a39e 990 const char *p;
4c4b4cd2 991 char *decoded;
14f9c5c9 992 int at_start_name;
4c4b4cd2
PH
993 static char *decoding_buffer = NULL;
994 static size_t decoding_buffer_size = 0;
d2e4a39e 995
29480c32
JB
996 /* The name of the Ada main procedure starts with "_ada_".
997 This prefix is not part of the decoded name, so skip this part
998 if we see this prefix. */
4c4b4cd2
PH
999 if (strncmp (encoded, "_ada_", 5) == 0)
1000 encoded += 5;
14f9c5c9 1001
29480c32
JB
1002 /* If the name starts with '_', then it is not a properly encoded
1003 name, so do not attempt to decode it. Similarly, if the name
1004 starts with '<', the name should not be decoded. */
4c4b4cd2 1005 if (encoded[0] == '_' || encoded[0] == '<')
14f9c5c9
AS
1006 goto Suppress;
1007
4c4b4cd2 1008 len0 = strlen (encoded);
4c4b4cd2 1009
29480c32
JB
1010 ada_remove_trailing_digits (encoded, &len0);
1011 ada_remove_po_subprogram_suffix (encoded, &len0);
529cad9c 1012
4c4b4cd2
PH
1013 /* Remove the ___X.* suffix if present. Do not forget to verify that
1014 the suffix is located before the current "end" of ENCODED. We want
1015 to avoid re-matching parts of ENCODED that have previously been
1016 marked as discarded (by decrementing LEN0). */
1017 p = strstr (encoded, "___");
1018 if (p != NULL && p - encoded < len0 - 3)
14f9c5c9
AS
1019 {
1020 if (p[3] == 'X')
4c4b4cd2 1021 len0 = p - encoded;
14f9c5c9 1022 else
4c4b4cd2 1023 goto Suppress;
14f9c5c9 1024 }
4c4b4cd2 1025
29480c32
JB
1026 /* Remove any trailing TKB suffix. It tells us that this symbol
1027 is for the body of a task, but that information does not actually
1028 appear in the decoded name. */
1029
4c4b4cd2 1030 if (len0 > 3 && strncmp (encoded + len0 - 3, "TKB", 3) == 0)
14f9c5c9 1031 len0 -= 3;
76a01679 1032
a10967fa
JB
1033 /* Remove any trailing TB suffix. The TB suffix is slightly different
1034 from the TKB suffix because it is used for non-anonymous task
1035 bodies. */
1036
1037 if (len0 > 2 && strncmp (encoded + len0 - 2, "TB", 2) == 0)
1038 len0 -= 2;
1039
29480c32
JB
1040 /* Remove trailing "B" suffixes. */
1041 /* FIXME: brobecker/2006-04-19: Not sure what this are used for... */
1042
4c4b4cd2 1043 if (len0 > 1 && strncmp (encoded + len0 - 1, "B", 1) == 0)
14f9c5c9
AS
1044 len0 -= 1;
1045
4c4b4cd2 1046 /* Make decoded big enough for possible expansion by operator name. */
29480c32 1047
4c4b4cd2
PH
1048 GROW_VECT (decoding_buffer, decoding_buffer_size, 2 * len0 + 1);
1049 decoded = decoding_buffer;
14f9c5c9 1050
29480c32
JB
1051 /* Remove trailing __{digit}+ or trailing ${digit}+. */
1052
4c4b4cd2 1053 if (len0 > 1 && isdigit (encoded[len0 - 1]))
d2e4a39e 1054 {
4c4b4cd2
PH
1055 i = len0 - 2;
1056 while ((i >= 0 && isdigit (encoded[i]))
1057 || (i >= 1 && encoded[i] == '_' && isdigit (encoded[i - 1])))
1058 i -= 1;
1059 if (i > 1 && encoded[i] == '_' && encoded[i - 1] == '_')
1060 len0 = i - 1;
1061 else if (encoded[i] == '$')
1062 len0 = i;
d2e4a39e 1063 }
14f9c5c9 1064
29480c32
JB
1065 /* The first few characters that are not alphabetic are not part
1066 of any encoding we use, so we can copy them over verbatim. */
1067
4c4b4cd2
PH
1068 for (i = 0, j = 0; i < len0 && !isalpha (encoded[i]); i += 1, j += 1)
1069 decoded[j] = encoded[i];
14f9c5c9
AS
1070
1071 at_start_name = 1;
1072 while (i < len0)
1073 {
29480c32 1074 /* Is this a symbol function? */
4c4b4cd2
PH
1075 if (at_start_name && encoded[i] == 'O')
1076 {
1077 int k;
5b4ee69b 1078
4c4b4cd2
PH
1079 for (k = 0; ada_opname_table[k].encoded != NULL; k += 1)
1080 {
1081 int op_len = strlen (ada_opname_table[k].encoded);
06d5cf63
JB
1082 if ((strncmp (ada_opname_table[k].encoded + 1, encoded + i + 1,
1083 op_len - 1) == 0)
1084 && !isalnum (encoded[i + op_len]))
4c4b4cd2
PH
1085 {
1086 strcpy (decoded + j, ada_opname_table[k].decoded);
1087 at_start_name = 0;
1088 i += op_len;
1089 j += strlen (ada_opname_table[k].decoded);
1090 break;
1091 }
1092 }
1093 if (ada_opname_table[k].encoded != NULL)
1094 continue;
1095 }
14f9c5c9
AS
1096 at_start_name = 0;
1097
529cad9c
PH
1098 /* Replace "TK__" with "__", which will eventually be translated
1099 into "." (just below). */
1100
4c4b4cd2
PH
1101 if (i < len0 - 4 && strncmp (encoded + i, "TK__", 4) == 0)
1102 i += 2;
529cad9c 1103
29480c32
JB
1104 /* Replace "__B_{DIGITS}+__" sequences by "__", which will eventually
1105 be translated into "." (just below). These are internal names
1106 generated for anonymous blocks inside which our symbol is nested. */
1107
1108 if (len0 - i > 5 && encoded [i] == '_' && encoded [i+1] == '_'
1109 && encoded [i+2] == 'B' && encoded [i+3] == '_'
1110 && isdigit (encoded [i+4]))
1111 {
1112 int k = i + 5;
1113
1114 while (k < len0 && isdigit (encoded[k]))
1115 k++; /* Skip any extra digit. */
1116
1117 /* Double-check that the "__B_{DIGITS}+" sequence we found
1118 is indeed followed by "__". */
1119 if (len0 - k > 2 && encoded [k] == '_' && encoded [k+1] == '_')
1120 i = k;
1121 }
1122
529cad9c
PH
1123 /* Remove _E{DIGITS}+[sb] */
1124
1125 /* Just as for protected object subprograms, there are 2 categories
0963b4bd 1126 of subprograms created by the compiler for each entry. The first
529cad9c
PH
1127 one implements the actual entry code, and has a suffix following
1128 the convention above; the second one implements the barrier and
1129 uses the same convention as above, except that the 'E' is replaced
1130 by a 'B'.
1131
1132 Just as above, we do not decode the name of barrier functions
1133 to give the user a clue that the code he is debugging has been
1134 internally generated. */
1135
1136 if (len0 - i > 3 && encoded [i] == '_' && encoded[i+1] == 'E'
1137 && isdigit (encoded[i+2]))
1138 {
1139 int k = i + 3;
1140
1141 while (k < len0 && isdigit (encoded[k]))
1142 k++;
1143
1144 if (k < len0
1145 && (encoded[k] == 'b' || encoded[k] == 's'))
1146 {
1147 k++;
1148 /* Just as an extra precaution, make sure that if this
1149 suffix is followed by anything else, it is a '_'.
1150 Otherwise, we matched this sequence by accident. */
1151 if (k == len0
1152 || (k < len0 && encoded[k] == '_'))
1153 i = k;
1154 }
1155 }
1156
1157 /* Remove trailing "N" in [a-z0-9]+N__. The N is added by
1158 the GNAT front-end in protected object subprograms. */
1159
1160 if (i < len0 + 3
1161 && encoded[i] == 'N' && encoded[i+1] == '_' && encoded[i+2] == '_')
1162 {
1163 /* Backtrack a bit up until we reach either the begining of
1164 the encoded name, or "__". Make sure that we only find
1165 digits or lowercase characters. */
1166 const char *ptr = encoded + i - 1;
1167
1168 while (ptr >= encoded && is_lower_alphanum (ptr[0]))
1169 ptr--;
1170 if (ptr < encoded
1171 || (ptr > encoded && ptr[0] == '_' && ptr[-1] == '_'))
1172 i++;
1173 }
1174
4c4b4cd2
PH
1175 if (encoded[i] == 'X' && i != 0 && isalnum (encoded[i - 1]))
1176 {
29480c32
JB
1177 /* This is a X[bn]* sequence not separated from the previous
1178 part of the name with a non-alpha-numeric character (in other
1179 words, immediately following an alpha-numeric character), then
1180 verify that it is placed at the end of the encoded name. If
1181 not, then the encoding is not valid and we should abort the
1182 decoding. Otherwise, just skip it, it is used in body-nested
1183 package names. */
4c4b4cd2
PH
1184 do
1185 i += 1;
1186 while (i < len0 && (encoded[i] == 'b' || encoded[i] == 'n'));
1187 if (i < len0)
1188 goto Suppress;
1189 }
cdc7bb92 1190 else if (i < len0 - 2 && encoded[i] == '_' && encoded[i + 1] == '_')
4c4b4cd2 1191 {
29480c32 1192 /* Replace '__' by '.'. */
4c4b4cd2
PH
1193 decoded[j] = '.';
1194 at_start_name = 1;
1195 i += 2;
1196 j += 1;
1197 }
14f9c5c9 1198 else
4c4b4cd2 1199 {
29480c32
JB
1200 /* It's a character part of the decoded name, so just copy it
1201 over. */
4c4b4cd2
PH
1202 decoded[j] = encoded[i];
1203 i += 1;
1204 j += 1;
1205 }
14f9c5c9 1206 }
4c4b4cd2 1207 decoded[j] = '\000';
14f9c5c9 1208
29480c32
JB
1209 /* Decoded names should never contain any uppercase character.
1210 Double-check this, and abort the decoding if we find one. */
1211
4c4b4cd2
PH
1212 for (i = 0; decoded[i] != '\0'; i += 1)
1213 if (isupper (decoded[i]) || decoded[i] == ' ')
14f9c5c9
AS
1214 goto Suppress;
1215
4c4b4cd2
PH
1216 if (strcmp (decoded, encoded) == 0)
1217 return encoded;
1218 else
1219 return decoded;
14f9c5c9
AS
1220
1221Suppress:
4c4b4cd2
PH
1222 GROW_VECT (decoding_buffer, decoding_buffer_size, strlen (encoded) + 3);
1223 decoded = decoding_buffer;
1224 if (encoded[0] == '<')
1225 strcpy (decoded, encoded);
14f9c5c9 1226 else
88c15c34 1227 xsnprintf (decoded, decoding_buffer_size, "<%s>", encoded);
4c4b4cd2
PH
1228 return decoded;
1229
1230}
1231
1232/* Table for keeping permanent unique copies of decoded names. Once
1233 allocated, names in this table are never released. While this is a
1234 storage leak, it should not be significant unless there are massive
1235 changes in the set of decoded names in successive versions of a
1236 symbol table loaded during a single session. */
1237static struct htab *decoded_names_store;
1238
1239/* Returns the decoded name of GSYMBOL, as for ada_decode, caching it
1240 in the language-specific part of GSYMBOL, if it has not been
1241 previously computed. Tries to save the decoded name in the same
1242 obstack as GSYMBOL, if possible, and otherwise on the heap (so that,
1243 in any case, the decoded symbol has a lifetime at least that of
0963b4bd 1244 GSYMBOL).
4c4b4cd2
PH
1245 The GSYMBOL parameter is "mutable" in the C++ sense: logically
1246 const, but nevertheless modified to a semantically equivalent form
0963b4bd 1247 when a decoded name is cached in it. */
4c4b4cd2 1248
76a01679
JB
1249char *
1250ada_decode_symbol (const struct general_symbol_info *gsymbol)
4c4b4cd2 1251{
76a01679 1252 char **resultp =
afa16725 1253 (char **) &gsymbol->language_specific.mangled_lang.demangled_name;
5b4ee69b 1254
4c4b4cd2
PH
1255 if (*resultp == NULL)
1256 {
1257 const char *decoded = ada_decode (gsymbol->name);
5b4ee69b 1258
714835d5 1259 if (gsymbol->obj_section != NULL)
76a01679 1260 {
714835d5 1261 struct objfile *objf = gsymbol->obj_section->objfile;
5b4ee69b 1262
714835d5
UW
1263 *resultp = obsavestring (decoded, strlen (decoded),
1264 &objf->objfile_obstack);
76a01679 1265 }
4c4b4cd2 1266 /* Sometimes, we can't find a corresponding objfile, in which
76a01679
JB
1267 case, we put the result on the heap. Since we only decode
1268 when needed, we hope this usually does not cause a
1269 significant memory leak (FIXME). */
4c4b4cd2 1270 if (*resultp == NULL)
76a01679
JB
1271 {
1272 char **slot = (char **) htab_find_slot (decoded_names_store,
1273 decoded, INSERT);
5b4ee69b 1274
76a01679
JB
1275 if (*slot == NULL)
1276 *slot = xstrdup (decoded);
1277 *resultp = *slot;
1278 }
4c4b4cd2 1279 }
14f9c5c9 1280
4c4b4cd2
PH
1281 return *resultp;
1282}
76a01679 1283
2c0b251b 1284static char *
76a01679 1285ada_la_decode (const char *encoded, int options)
4c4b4cd2
PH
1286{
1287 return xstrdup (ada_decode (encoded));
14f9c5c9
AS
1288}
1289
1290/* Returns non-zero iff SYM_NAME matches NAME, ignoring any trailing
4c4b4cd2
PH
1291 suffixes that encode debugging information or leading _ada_ on
1292 SYM_NAME (see is_name_suffix commentary for the debugging
1293 information that is ignored). If WILD, then NAME need only match a
1294 suffix of SYM_NAME minus the same suffixes. Also returns 0 if
1295 either argument is NULL. */
14f9c5c9 1296
2c0b251b 1297static int
40658b94 1298match_name (const char *sym_name, const char *name, int wild)
14f9c5c9
AS
1299{
1300 if (sym_name == NULL || name == NULL)
1301 return 0;
1302 else if (wild)
73589123 1303 return wild_match (sym_name, name) == 0;
d2e4a39e
AS
1304 else
1305 {
1306 int len_name = strlen (name);
5b4ee69b 1307
4c4b4cd2
PH
1308 return (strncmp (sym_name, name, len_name) == 0
1309 && is_name_suffix (sym_name + len_name))
1310 || (strncmp (sym_name, "_ada_", 5) == 0
1311 && strncmp (sym_name + 5, name, len_name) == 0
1312 && is_name_suffix (sym_name + len_name + 5));
d2e4a39e 1313 }
14f9c5c9 1314}
14f9c5c9 1315\f
d2e4a39e 1316
4c4b4cd2 1317 /* Arrays */
14f9c5c9 1318
28c85d6c
JB
1319/* Assuming that INDEX_DESC_TYPE is an ___XA structure, a structure
1320 generated by the GNAT compiler to describe the index type used
1321 for each dimension of an array, check whether it follows the latest
1322 known encoding. If not, fix it up to conform to the latest encoding.
1323 Otherwise, do nothing. This function also does nothing if
1324 INDEX_DESC_TYPE is NULL.
1325
1326 The GNAT encoding used to describle the array index type evolved a bit.
1327 Initially, the information would be provided through the name of each
1328 field of the structure type only, while the type of these fields was
1329 described as unspecified and irrelevant. The debugger was then expected
1330 to perform a global type lookup using the name of that field in order
1331 to get access to the full index type description. Because these global
1332 lookups can be very expensive, the encoding was later enhanced to make
1333 the global lookup unnecessary by defining the field type as being
1334 the full index type description.
1335
1336 The purpose of this routine is to allow us to support older versions
1337 of the compiler by detecting the use of the older encoding, and by
1338 fixing up the INDEX_DESC_TYPE to follow the new one (at this point,
1339 we essentially replace each field's meaningless type by the associated
1340 index subtype). */
1341
1342void
1343ada_fixup_array_indexes_type (struct type *index_desc_type)
1344{
1345 int i;
1346
1347 if (index_desc_type == NULL)
1348 return;
1349 gdb_assert (TYPE_NFIELDS (index_desc_type) > 0);
1350
1351 /* Check if INDEX_DESC_TYPE follows the older encoding (it is sufficient
1352 to check one field only, no need to check them all). If not, return
1353 now.
1354
1355 If our INDEX_DESC_TYPE was generated using the older encoding,
1356 the field type should be a meaningless integer type whose name
1357 is not equal to the field name. */
1358 if (TYPE_NAME (TYPE_FIELD_TYPE (index_desc_type, 0)) != NULL
1359 && strcmp (TYPE_NAME (TYPE_FIELD_TYPE (index_desc_type, 0)),
1360 TYPE_FIELD_NAME (index_desc_type, 0)) == 0)
1361 return;
1362
1363 /* Fixup each field of INDEX_DESC_TYPE. */
1364 for (i = 0; i < TYPE_NFIELDS (index_desc_type); i++)
1365 {
1366 char *name = TYPE_FIELD_NAME (index_desc_type, i);
1367 struct type *raw_type = ada_check_typedef (ada_find_any_type (name));
1368
1369 if (raw_type)
1370 TYPE_FIELD_TYPE (index_desc_type, i) = raw_type;
1371 }
1372}
1373
4c4b4cd2 1374/* Names of MAX_ADA_DIMENS bounds in P_BOUNDS fields of array descriptors. */
14f9c5c9 1375
d2e4a39e
AS
1376static char *bound_name[] = {
1377 "LB0", "UB0", "LB1", "UB1", "LB2", "UB2", "LB3", "UB3",
14f9c5c9
AS
1378 "LB4", "UB4", "LB5", "UB5", "LB6", "UB6", "LB7", "UB7"
1379};
1380
1381/* Maximum number of array dimensions we are prepared to handle. */
1382
4c4b4cd2 1383#define MAX_ADA_DIMENS (sizeof(bound_name) / (2*sizeof(char *)))
14f9c5c9 1384
14f9c5c9 1385
4c4b4cd2
PH
1386/* The desc_* routines return primitive portions of array descriptors
1387 (fat pointers). */
14f9c5c9
AS
1388
1389/* The descriptor or array type, if any, indicated by TYPE; removes
4c4b4cd2
PH
1390 level of indirection, if needed. */
1391
d2e4a39e
AS
1392static struct type *
1393desc_base_type (struct type *type)
14f9c5c9
AS
1394{
1395 if (type == NULL)
1396 return NULL;
61ee279c 1397 type = ada_check_typedef (type);
720d1a40
JB
1398 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
1399 type = ada_typedef_target_type (type);
1400
1265e4aa
JB
1401 if (type != NULL
1402 && (TYPE_CODE (type) == TYPE_CODE_PTR
1403 || TYPE_CODE (type) == TYPE_CODE_REF))
61ee279c 1404 return ada_check_typedef (TYPE_TARGET_TYPE (type));
14f9c5c9
AS
1405 else
1406 return type;
1407}
1408
4c4b4cd2
PH
1409/* True iff TYPE indicates a "thin" array pointer type. */
1410
14f9c5c9 1411static int
d2e4a39e 1412is_thin_pntr (struct type *type)
14f9c5c9 1413{
d2e4a39e 1414 return
14f9c5c9
AS
1415 is_suffix (ada_type_name (desc_base_type (type)), "___XUT")
1416 || is_suffix (ada_type_name (desc_base_type (type)), "___XUT___XVE");
1417}
1418
4c4b4cd2
PH
1419/* The descriptor type for thin pointer type TYPE. */
1420
d2e4a39e
AS
1421static struct type *
1422thin_descriptor_type (struct type *type)
14f9c5c9 1423{
d2e4a39e 1424 struct type *base_type = desc_base_type (type);
5b4ee69b 1425
14f9c5c9
AS
1426 if (base_type == NULL)
1427 return NULL;
1428 if (is_suffix (ada_type_name (base_type), "___XVE"))
1429 return base_type;
d2e4a39e 1430 else
14f9c5c9 1431 {
d2e4a39e 1432 struct type *alt_type = ada_find_parallel_type (base_type, "___XVE");
5b4ee69b 1433
14f9c5c9 1434 if (alt_type == NULL)
4c4b4cd2 1435 return base_type;
14f9c5c9 1436 else
4c4b4cd2 1437 return alt_type;
14f9c5c9
AS
1438 }
1439}
1440
4c4b4cd2
PH
1441/* A pointer to the array data for thin-pointer value VAL. */
1442
d2e4a39e
AS
1443static struct value *
1444thin_data_pntr (struct value *val)
14f9c5c9 1445{
828292f2 1446 struct type *type = ada_check_typedef (value_type (val));
556bdfd4 1447 struct type *data_type = desc_data_target_type (thin_descriptor_type (type));
5b4ee69b 1448
556bdfd4
UW
1449 data_type = lookup_pointer_type (data_type);
1450
14f9c5c9 1451 if (TYPE_CODE (type) == TYPE_CODE_PTR)
556bdfd4 1452 return value_cast (data_type, value_copy (val));
d2e4a39e 1453 else
42ae5230 1454 return value_from_longest (data_type, value_address (val));
14f9c5c9
AS
1455}
1456
4c4b4cd2
PH
1457/* True iff TYPE indicates a "thick" array pointer type. */
1458
14f9c5c9 1459static int
d2e4a39e 1460is_thick_pntr (struct type *type)
14f9c5c9
AS
1461{
1462 type = desc_base_type (type);
1463 return (type != NULL && TYPE_CODE (type) == TYPE_CODE_STRUCT
4c4b4cd2 1464 && lookup_struct_elt_type (type, "P_BOUNDS", 1) != NULL);
14f9c5c9
AS
1465}
1466
4c4b4cd2
PH
1467/* If TYPE is the type of an array descriptor (fat or thin pointer) or a
1468 pointer to one, the type of its bounds data; otherwise, NULL. */
76a01679 1469
d2e4a39e
AS
1470static struct type *
1471desc_bounds_type (struct type *type)
14f9c5c9 1472{
d2e4a39e 1473 struct type *r;
14f9c5c9
AS
1474
1475 type = desc_base_type (type);
1476
1477 if (type == NULL)
1478 return NULL;
1479 else if (is_thin_pntr (type))
1480 {
1481 type = thin_descriptor_type (type);
1482 if (type == NULL)
4c4b4cd2 1483 return NULL;
14f9c5c9
AS
1484 r = lookup_struct_elt_type (type, "BOUNDS", 1);
1485 if (r != NULL)
61ee279c 1486 return ada_check_typedef (r);
14f9c5c9
AS
1487 }
1488 else if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
1489 {
1490 r = lookup_struct_elt_type (type, "P_BOUNDS", 1);
1491 if (r != NULL)
61ee279c 1492 return ada_check_typedef (TYPE_TARGET_TYPE (ada_check_typedef (r)));
14f9c5c9
AS
1493 }
1494 return NULL;
1495}
1496
1497/* If ARR is an array descriptor (fat or thin pointer), or pointer to
4c4b4cd2
PH
1498 one, a pointer to its bounds data. Otherwise NULL. */
1499
d2e4a39e
AS
1500static struct value *
1501desc_bounds (struct value *arr)
14f9c5c9 1502{
df407dfe 1503 struct type *type = ada_check_typedef (value_type (arr));
5b4ee69b 1504
d2e4a39e 1505 if (is_thin_pntr (type))
14f9c5c9 1506 {
d2e4a39e 1507 struct type *bounds_type =
4c4b4cd2 1508 desc_bounds_type (thin_descriptor_type (type));
14f9c5c9
AS
1509 LONGEST addr;
1510
4cdfadb1 1511 if (bounds_type == NULL)
323e0a4a 1512 error (_("Bad GNAT array descriptor"));
14f9c5c9
AS
1513
1514 /* NOTE: The following calculation is not really kosher, but
d2e4a39e 1515 since desc_type is an XVE-encoded type (and shouldn't be),
4c4b4cd2 1516 the correct calculation is a real pain. FIXME (and fix GCC). */
14f9c5c9 1517 if (TYPE_CODE (type) == TYPE_CODE_PTR)
4c4b4cd2 1518 addr = value_as_long (arr);
d2e4a39e 1519 else
42ae5230 1520 addr = value_address (arr);
14f9c5c9 1521
d2e4a39e 1522 return
4c4b4cd2
PH
1523 value_from_longest (lookup_pointer_type (bounds_type),
1524 addr - TYPE_LENGTH (bounds_type));
14f9c5c9
AS
1525 }
1526
1527 else if (is_thick_pntr (type))
05e522ef
JB
1528 {
1529 struct value *p_bounds = value_struct_elt (&arr, NULL, "P_BOUNDS", NULL,
1530 _("Bad GNAT array descriptor"));
1531 struct type *p_bounds_type = value_type (p_bounds);
1532
1533 if (p_bounds_type
1534 && TYPE_CODE (p_bounds_type) == TYPE_CODE_PTR)
1535 {
1536 struct type *target_type = TYPE_TARGET_TYPE (p_bounds_type);
1537
1538 if (TYPE_STUB (target_type))
1539 p_bounds = value_cast (lookup_pointer_type
1540 (ada_check_typedef (target_type)),
1541 p_bounds);
1542 }
1543 else
1544 error (_("Bad GNAT array descriptor"));
1545
1546 return p_bounds;
1547 }
14f9c5c9
AS
1548 else
1549 return NULL;
1550}
1551
4c4b4cd2
PH
1552/* If TYPE is the type of an array-descriptor (fat pointer), the bit
1553 position of the field containing the address of the bounds data. */
1554
14f9c5c9 1555static int
d2e4a39e 1556fat_pntr_bounds_bitpos (struct type *type)
14f9c5c9
AS
1557{
1558 return TYPE_FIELD_BITPOS (desc_base_type (type), 1);
1559}
1560
1561/* If TYPE is the type of an array-descriptor (fat pointer), the bit
4c4b4cd2
PH
1562 size of the field containing the address of the bounds data. */
1563
14f9c5c9 1564static int
d2e4a39e 1565fat_pntr_bounds_bitsize (struct type *type)
14f9c5c9
AS
1566{
1567 type = desc_base_type (type);
1568
d2e4a39e 1569 if (TYPE_FIELD_BITSIZE (type, 1) > 0)
14f9c5c9
AS
1570 return TYPE_FIELD_BITSIZE (type, 1);
1571 else
61ee279c 1572 return 8 * TYPE_LENGTH (ada_check_typedef (TYPE_FIELD_TYPE (type, 1)));
14f9c5c9
AS
1573}
1574
4c4b4cd2 1575/* If TYPE is the type of an array descriptor (fat or thin pointer) or a
556bdfd4
UW
1576 pointer to one, the type of its array data (a array-with-no-bounds type);
1577 otherwise, NULL. Use ada_type_of_array to get an array type with bounds
1578 data. */
4c4b4cd2 1579
d2e4a39e 1580static struct type *
556bdfd4 1581desc_data_target_type (struct type *type)
14f9c5c9
AS
1582{
1583 type = desc_base_type (type);
1584
4c4b4cd2 1585 /* NOTE: The following is bogus; see comment in desc_bounds. */
14f9c5c9 1586 if (is_thin_pntr (type))
556bdfd4 1587 return desc_base_type (TYPE_FIELD_TYPE (thin_descriptor_type (type), 1));
14f9c5c9 1588 else if (is_thick_pntr (type))
556bdfd4
UW
1589 {
1590 struct type *data_type = lookup_struct_elt_type (type, "P_ARRAY", 1);
1591
1592 if (data_type
1593 && TYPE_CODE (ada_check_typedef (data_type)) == TYPE_CODE_PTR)
05e522ef 1594 return ada_check_typedef (TYPE_TARGET_TYPE (data_type));
556bdfd4
UW
1595 }
1596
1597 return NULL;
14f9c5c9
AS
1598}
1599
1600/* If ARR is an array descriptor (fat or thin pointer), a pointer to
1601 its array data. */
4c4b4cd2 1602
d2e4a39e
AS
1603static struct value *
1604desc_data (struct value *arr)
14f9c5c9 1605{
df407dfe 1606 struct type *type = value_type (arr);
5b4ee69b 1607
14f9c5c9
AS
1608 if (is_thin_pntr (type))
1609 return thin_data_pntr (arr);
1610 else if (is_thick_pntr (type))
d2e4a39e 1611 return value_struct_elt (&arr, NULL, "P_ARRAY", NULL,
323e0a4a 1612 _("Bad GNAT array descriptor"));
14f9c5c9
AS
1613 else
1614 return NULL;
1615}
1616
1617
1618/* If TYPE is the type of an array-descriptor (fat pointer), the bit
4c4b4cd2
PH
1619 position of the field containing the address of the data. */
1620
14f9c5c9 1621static int
d2e4a39e 1622fat_pntr_data_bitpos (struct type *type)
14f9c5c9
AS
1623{
1624 return TYPE_FIELD_BITPOS (desc_base_type (type), 0);
1625}
1626
1627/* If TYPE is the type of an array-descriptor (fat pointer), the bit
4c4b4cd2
PH
1628 size of the field containing the address of the data. */
1629
14f9c5c9 1630static int
d2e4a39e 1631fat_pntr_data_bitsize (struct type *type)
14f9c5c9
AS
1632{
1633 type = desc_base_type (type);
1634
1635 if (TYPE_FIELD_BITSIZE (type, 0) > 0)
1636 return TYPE_FIELD_BITSIZE (type, 0);
d2e4a39e 1637 else
14f9c5c9
AS
1638 return TARGET_CHAR_BIT * TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0));
1639}
1640
4c4b4cd2 1641/* If BOUNDS is an array-bounds structure (or pointer to one), return
14f9c5c9 1642 the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
4c4b4cd2
PH
1643 bound, if WHICH is 1. The first bound is I=1. */
1644
d2e4a39e
AS
1645static struct value *
1646desc_one_bound (struct value *bounds, int i, int which)
14f9c5c9 1647{
d2e4a39e 1648 return value_struct_elt (&bounds, NULL, bound_name[2 * i + which - 2], NULL,
323e0a4a 1649 _("Bad GNAT array descriptor bounds"));
14f9c5c9
AS
1650}
1651
1652/* If BOUNDS is an array-bounds structure type, return the bit position
1653 of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
4c4b4cd2
PH
1654 bound, if WHICH is 1. The first bound is I=1. */
1655
14f9c5c9 1656static int
d2e4a39e 1657desc_bound_bitpos (struct type *type, int i, int which)
14f9c5c9 1658{
d2e4a39e 1659 return TYPE_FIELD_BITPOS (desc_base_type (type), 2 * i + which - 2);
14f9c5c9
AS
1660}
1661
1662/* If BOUNDS is an array-bounds structure type, return the bit field size
1663 of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
4c4b4cd2
PH
1664 bound, if WHICH is 1. The first bound is I=1. */
1665
76a01679 1666static int
d2e4a39e 1667desc_bound_bitsize (struct type *type, int i, int which)
14f9c5c9
AS
1668{
1669 type = desc_base_type (type);
1670
d2e4a39e
AS
1671 if (TYPE_FIELD_BITSIZE (type, 2 * i + which - 2) > 0)
1672 return TYPE_FIELD_BITSIZE (type, 2 * i + which - 2);
1673 else
1674 return 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (type, 2 * i + which - 2));
14f9c5c9
AS
1675}
1676
1677/* If TYPE is the type of an array-bounds structure, the type of its
4c4b4cd2
PH
1678 Ith bound (numbering from 1). Otherwise, NULL. */
1679
d2e4a39e
AS
1680static struct type *
1681desc_index_type (struct type *type, int i)
14f9c5c9
AS
1682{
1683 type = desc_base_type (type);
1684
1685 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
d2e4a39e
AS
1686 return lookup_struct_elt_type (type, bound_name[2 * i - 2], 1);
1687 else
14f9c5c9
AS
1688 return NULL;
1689}
1690
4c4b4cd2
PH
1691/* The number of index positions in the array-bounds type TYPE.
1692 Return 0 if TYPE is NULL. */
1693
14f9c5c9 1694static int
d2e4a39e 1695desc_arity (struct type *type)
14f9c5c9
AS
1696{
1697 type = desc_base_type (type);
1698
1699 if (type != NULL)
1700 return TYPE_NFIELDS (type) / 2;
1701 return 0;
1702}
1703
4c4b4cd2
PH
1704/* Non-zero iff TYPE is a simple array type (not a pointer to one) or
1705 an array descriptor type (representing an unconstrained array
1706 type). */
1707
76a01679
JB
1708static int
1709ada_is_direct_array_type (struct type *type)
4c4b4cd2
PH
1710{
1711 if (type == NULL)
1712 return 0;
61ee279c 1713 type = ada_check_typedef (type);
4c4b4cd2 1714 return (TYPE_CODE (type) == TYPE_CODE_ARRAY
76a01679 1715 || ada_is_array_descriptor_type (type));
4c4b4cd2
PH
1716}
1717
52ce6436 1718/* Non-zero iff TYPE represents any kind of array in Ada, or a pointer
0963b4bd 1719 * to one. */
52ce6436 1720
2c0b251b 1721static int
52ce6436
PH
1722ada_is_array_type (struct type *type)
1723{
1724 while (type != NULL
1725 && (TYPE_CODE (type) == TYPE_CODE_PTR
1726 || TYPE_CODE (type) == TYPE_CODE_REF))
1727 type = TYPE_TARGET_TYPE (type);
1728 return ada_is_direct_array_type (type);
1729}
1730
4c4b4cd2 1731/* Non-zero iff TYPE is a simple array type or pointer to one. */
14f9c5c9 1732
14f9c5c9 1733int
4c4b4cd2 1734ada_is_simple_array_type (struct type *type)
14f9c5c9
AS
1735{
1736 if (type == NULL)
1737 return 0;
61ee279c 1738 type = ada_check_typedef (type);
14f9c5c9 1739 return (TYPE_CODE (type) == TYPE_CODE_ARRAY
4c4b4cd2 1740 || (TYPE_CODE (type) == TYPE_CODE_PTR
b0dd7688
JB
1741 && TYPE_CODE (ada_check_typedef (TYPE_TARGET_TYPE (type)))
1742 == TYPE_CODE_ARRAY));
14f9c5c9
AS
1743}
1744
4c4b4cd2
PH
1745/* Non-zero iff TYPE belongs to a GNAT array descriptor. */
1746
14f9c5c9 1747int
4c4b4cd2 1748ada_is_array_descriptor_type (struct type *type)
14f9c5c9 1749{
556bdfd4 1750 struct type *data_type = desc_data_target_type (type);
14f9c5c9
AS
1751
1752 if (type == NULL)
1753 return 0;
61ee279c 1754 type = ada_check_typedef (type);
556bdfd4
UW
1755 return (data_type != NULL
1756 && TYPE_CODE (data_type) == TYPE_CODE_ARRAY
1757 && desc_arity (desc_bounds_type (type)) > 0);
14f9c5c9
AS
1758}
1759
1760/* Non-zero iff type is a partially mal-formed GNAT array
4c4b4cd2 1761 descriptor. FIXME: This is to compensate for some problems with
14f9c5c9 1762 debugging output from GNAT. Re-examine periodically to see if it
4c4b4cd2
PH
1763 is still needed. */
1764
14f9c5c9 1765int
ebf56fd3 1766ada_is_bogus_array_descriptor (struct type *type)
14f9c5c9 1767{
d2e4a39e 1768 return
14f9c5c9
AS
1769 type != NULL
1770 && TYPE_CODE (type) == TYPE_CODE_STRUCT
1771 && (lookup_struct_elt_type (type, "P_BOUNDS", 1) != NULL
4c4b4cd2
PH
1772 || lookup_struct_elt_type (type, "P_ARRAY", 1) != NULL)
1773 && !ada_is_array_descriptor_type (type);
14f9c5c9
AS
1774}
1775
1776
4c4b4cd2 1777/* If ARR has a record type in the form of a standard GNAT array descriptor,
14f9c5c9 1778 (fat pointer) returns the type of the array data described---specifically,
4c4b4cd2 1779 a pointer-to-array type. If BOUNDS is non-zero, the bounds data are filled
14f9c5c9 1780 in from the descriptor; otherwise, they are left unspecified. If
4c4b4cd2
PH
1781 the ARR denotes a null array descriptor and BOUNDS is non-zero,
1782 returns NULL. The result is simply the type of ARR if ARR is not
14f9c5c9 1783 a descriptor. */
d2e4a39e
AS
1784struct type *
1785ada_type_of_array (struct value *arr, int bounds)
14f9c5c9 1786{
ad82864c
JB
1787 if (ada_is_constrained_packed_array_type (value_type (arr)))
1788 return decode_constrained_packed_array_type (value_type (arr));
14f9c5c9 1789
df407dfe
AC
1790 if (!ada_is_array_descriptor_type (value_type (arr)))
1791 return value_type (arr);
d2e4a39e
AS
1792
1793 if (!bounds)
ad82864c
JB
1794 {
1795 struct type *array_type =
1796 ada_check_typedef (desc_data_target_type (value_type (arr)));
1797
1798 if (ada_is_unconstrained_packed_array_type (value_type (arr)))
1799 TYPE_FIELD_BITSIZE (array_type, 0) =
1800 decode_packed_array_bitsize (value_type (arr));
1801
1802 return array_type;
1803 }
14f9c5c9
AS
1804 else
1805 {
d2e4a39e 1806 struct type *elt_type;
14f9c5c9 1807 int arity;
d2e4a39e 1808 struct value *descriptor;
14f9c5c9 1809
df407dfe
AC
1810 elt_type = ada_array_element_type (value_type (arr), -1);
1811 arity = ada_array_arity (value_type (arr));
14f9c5c9 1812
d2e4a39e 1813 if (elt_type == NULL || arity == 0)
df407dfe 1814 return ada_check_typedef (value_type (arr));
14f9c5c9
AS
1815
1816 descriptor = desc_bounds (arr);
d2e4a39e 1817 if (value_as_long (descriptor) == 0)
4c4b4cd2 1818 return NULL;
d2e4a39e 1819 while (arity > 0)
4c4b4cd2 1820 {
e9bb382b
UW
1821 struct type *range_type = alloc_type_copy (value_type (arr));
1822 struct type *array_type = alloc_type_copy (value_type (arr));
4c4b4cd2
PH
1823 struct value *low = desc_one_bound (descriptor, arity, 0);
1824 struct value *high = desc_one_bound (descriptor, arity, 1);
4c4b4cd2 1825
5b4ee69b 1826 arity -= 1;
df407dfe 1827 create_range_type (range_type, value_type (low),
529cad9c
PH
1828 longest_to_int (value_as_long (low)),
1829 longest_to_int (value_as_long (high)));
4c4b4cd2 1830 elt_type = create_array_type (array_type, elt_type, range_type);
ad82864c
JB
1831
1832 if (ada_is_unconstrained_packed_array_type (value_type (arr)))
e67ad678
JB
1833 {
1834 /* We need to store the element packed bitsize, as well as
1835 recompute the array size, because it was previously
1836 computed based on the unpacked element size. */
1837 LONGEST lo = value_as_long (low);
1838 LONGEST hi = value_as_long (high);
1839
1840 TYPE_FIELD_BITSIZE (elt_type, 0) =
1841 decode_packed_array_bitsize (value_type (arr));
1842 /* If the array has no element, then the size is already
1843 zero, and does not need to be recomputed. */
1844 if (lo < hi)
1845 {
1846 int array_bitsize =
1847 (hi - lo + 1) * TYPE_FIELD_BITSIZE (elt_type, 0);
1848
1849 TYPE_LENGTH (array_type) = (array_bitsize + 7) / 8;
1850 }
1851 }
4c4b4cd2 1852 }
14f9c5c9
AS
1853
1854 return lookup_pointer_type (elt_type);
1855 }
1856}
1857
1858/* If ARR does not represent an array, returns ARR unchanged.
4c4b4cd2
PH
1859 Otherwise, returns either a standard GDB array with bounds set
1860 appropriately or, if ARR is a non-null fat pointer, a pointer to a standard
1861 GDB array. Returns NULL if ARR is a null fat pointer. */
1862
d2e4a39e
AS
1863struct value *
1864ada_coerce_to_simple_array_ptr (struct value *arr)
14f9c5c9 1865{
df407dfe 1866 if (ada_is_array_descriptor_type (value_type (arr)))
14f9c5c9 1867 {
d2e4a39e 1868 struct type *arrType = ada_type_of_array (arr, 1);
5b4ee69b 1869
14f9c5c9 1870 if (arrType == NULL)
4c4b4cd2 1871 return NULL;
14f9c5c9
AS
1872 return value_cast (arrType, value_copy (desc_data (arr)));
1873 }
ad82864c
JB
1874 else if (ada_is_constrained_packed_array_type (value_type (arr)))
1875 return decode_constrained_packed_array (arr);
14f9c5c9
AS
1876 else
1877 return arr;
1878}
1879
1880/* If ARR does not represent an array, returns ARR unchanged.
1881 Otherwise, returns a standard GDB array describing ARR (which may
4c4b4cd2
PH
1882 be ARR itself if it already is in the proper form). */
1883
720d1a40 1884struct value *
d2e4a39e 1885ada_coerce_to_simple_array (struct value *arr)
14f9c5c9 1886{
df407dfe 1887 if (ada_is_array_descriptor_type (value_type (arr)))
14f9c5c9 1888 {
d2e4a39e 1889 struct value *arrVal = ada_coerce_to_simple_array_ptr (arr);
5b4ee69b 1890
14f9c5c9 1891 if (arrVal == NULL)
323e0a4a 1892 error (_("Bounds unavailable for null array pointer."));
529cad9c 1893 check_size (TYPE_TARGET_TYPE (value_type (arrVal)));
14f9c5c9
AS
1894 return value_ind (arrVal);
1895 }
ad82864c
JB
1896 else if (ada_is_constrained_packed_array_type (value_type (arr)))
1897 return decode_constrained_packed_array (arr);
d2e4a39e 1898 else
14f9c5c9
AS
1899 return arr;
1900}
1901
1902/* If TYPE represents a GNAT array type, return it translated to an
1903 ordinary GDB array type (possibly with BITSIZE fields indicating
4c4b4cd2
PH
1904 packing). For other types, is the identity. */
1905
d2e4a39e
AS
1906struct type *
1907ada_coerce_to_simple_array_type (struct type *type)
14f9c5c9 1908{
ad82864c
JB
1909 if (ada_is_constrained_packed_array_type (type))
1910 return decode_constrained_packed_array_type (type);
17280b9f
UW
1911
1912 if (ada_is_array_descriptor_type (type))
556bdfd4 1913 return ada_check_typedef (desc_data_target_type (type));
17280b9f
UW
1914
1915 return type;
14f9c5c9
AS
1916}
1917
4c4b4cd2
PH
1918/* Non-zero iff TYPE represents a standard GNAT packed-array type. */
1919
ad82864c
JB
1920static int
1921ada_is_packed_array_type (struct type *type)
14f9c5c9
AS
1922{
1923 if (type == NULL)
1924 return 0;
4c4b4cd2 1925 type = desc_base_type (type);
61ee279c 1926 type = ada_check_typedef (type);
d2e4a39e 1927 return
14f9c5c9
AS
1928 ada_type_name (type) != NULL
1929 && strstr (ada_type_name (type), "___XP") != NULL;
1930}
1931
ad82864c
JB
1932/* Non-zero iff TYPE represents a standard GNAT constrained
1933 packed-array type. */
1934
1935int
1936ada_is_constrained_packed_array_type (struct type *type)
1937{
1938 return ada_is_packed_array_type (type)
1939 && !ada_is_array_descriptor_type (type);
1940}
1941
1942/* Non-zero iff TYPE represents an array descriptor for a
1943 unconstrained packed-array type. */
1944
1945static int
1946ada_is_unconstrained_packed_array_type (struct type *type)
1947{
1948 return ada_is_packed_array_type (type)
1949 && ada_is_array_descriptor_type (type);
1950}
1951
1952/* Given that TYPE encodes a packed array type (constrained or unconstrained),
1953 return the size of its elements in bits. */
1954
1955static long
1956decode_packed_array_bitsize (struct type *type)
1957{
720d1a40 1958 char *raw_name;
ad82864c
JB
1959 char *tail;
1960 long bits;
1961
720d1a40
JB
1962 /* Access to arrays implemented as fat pointers are encoded as a typedef
1963 of the fat pointer type. We need the name of the fat pointer type
1964 to do the decoding, so strip the typedef layer. */
1965 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
1966 type = ada_typedef_target_type (type);
1967
1968 raw_name = ada_type_name (ada_check_typedef (type));
ad82864c
JB
1969 if (!raw_name)
1970 raw_name = ada_type_name (desc_base_type (type));
1971
1972 if (!raw_name)
1973 return 0;
1974
1975 tail = strstr (raw_name, "___XP");
720d1a40 1976 gdb_assert (tail != NULL);
ad82864c
JB
1977
1978 if (sscanf (tail + sizeof ("___XP") - 1, "%ld", &bits) != 1)
1979 {
1980 lim_warning
1981 (_("could not understand bit size information on packed array"));
1982 return 0;
1983 }
1984
1985 return bits;
1986}
1987
14f9c5c9
AS
1988/* Given that TYPE is a standard GDB array type with all bounds filled
1989 in, and that the element size of its ultimate scalar constituents
1990 (that is, either its elements, or, if it is an array of arrays, its
1991 elements' elements, etc.) is *ELT_BITS, return an identical type,
1992 but with the bit sizes of its elements (and those of any
1993 constituent arrays) recorded in the BITSIZE components of its
4c4b4cd2
PH
1994 TYPE_FIELD_BITSIZE values, and with *ELT_BITS set to its total size
1995 in bits. */
1996
d2e4a39e 1997static struct type *
ad82864c 1998constrained_packed_array_type (struct type *type, long *elt_bits)
14f9c5c9 1999{
d2e4a39e
AS
2000 struct type *new_elt_type;
2001 struct type *new_type;
14f9c5c9
AS
2002 LONGEST low_bound, high_bound;
2003
61ee279c 2004 type = ada_check_typedef (type);
14f9c5c9
AS
2005 if (TYPE_CODE (type) != TYPE_CODE_ARRAY)
2006 return type;
2007
e9bb382b 2008 new_type = alloc_type_copy (type);
ad82864c
JB
2009 new_elt_type =
2010 constrained_packed_array_type (ada_check_typedef (TYPE_TARGET_TYPE (type)),
2011 elt_bits);
262452ec 2012 create_array_type (new_type, new_elt_type, TYPE_INDEX_TYPE (type));
14f9c5c9
AS
2013 TYPE_FIELD_BITSIZE (new_type, 0) = *elt_bits;
2014 TYPE_NAME (new_type) = ada_type_name (type);
2015
262452ec 2016 if (get_discrete_bounds (TYPE_INDEX_TYPE (type),
4c4b4cd2 2017 &low_bound, &high_bound) < 0)
14f9c5c9
AS
2018 low_bound = high_bound = 0;
2019 if (high_bound < low_bound)
2020 *elt_bits = TYPE_LENGTH (new_type) = 0;
d2e4a39e 2021 else
14f9c5c9
AS
2022 {
2023 *elt_bits *= (high_bound - low_bound + 1);
d2e4a39e 2024 TYPE_LENGTH (new_type) =
4c4b4cd2 2025 (*elt_bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT;
14f9c5c9
AS
2026 }
2027
876cecd0 2028 TYPE_FIXED_INSTANCE (new_type) = 1;
14f9c5c9
AS
2029 return new_type;
2030}
2031
ad82864c
JB
2032/* The array type encoded by TYPE, where
2033 ada_is_constrained_packed_array_type (TYPE). */
4c4b4cd2 2034
d2e4a39e 2035static struct type *
ad82864c 2036decode_constrained_packed_array_type (struct type *type)
d2e4a39e 2037{
727e3d2e
JB
2038 char *raw_name = ada_type_name (ada_check_typedef (type));
2039 char *name;
2040 char *tail;
d2e4a39e 2041 struct type *shadow_type;
14f9c5c9 2042 long bits;
14f9c5c9 2043
727e3d2e
JB
2044 if (!raw_name)
2045 raw_name = ada_type_name (desc_base_type (type));
2046
2047 if (!raw_name)
2048 return NULL;
2049
2050 name = (char *) alloca (strlen (raw_name) + 1);
2051 tail = strstr (raw_name, "___XP");
4c4b4cd2
PH
2052 type = desc_base_type (type);
2053
14f9c5c9
AS
2054 memcpy (name, raw_name, tail - raw_name);
2055 name[tail - raw_name] = '\000';
2056
b4ba55a1
JB
2057 shadow_type = ada_find_parallel_type_with_name (type, name);
2058
2059 if (shadow_type == NULL)
14f9c5c9 2060 {
323e0a4a 2061 lim_warning (_("could not find bounds information on packed array"));
14f9c5c9
AS
2062 return NULL;
2063 }
cb249c71 2064 CHECK_TYPEDEF (shadow_type);
14f9c5c9
AS
2065
2066 if (TYPE_CODE (shadow_type) != TYPE_CODE_ARRAY)
2067 {
0963b4bd
MS
2068 lim_warning (_("could not understand bounds "
2069 "information on packed array"));
14f9c5c9
AS
2070 return NULL;
2071 }
d2e4a39e 2072
ad82864c
JB
2073 bits = decode_packed_array_bitsize (type);
2074 return constrained_packed_array_type (shadow_type, &bits);
14f9c5c9
AS
2075}
2076
ad82864c
JB
2077/* Given that ARR is a struct value *indicating a GNAT constrained packed
2078 array, returns a simple array that denotes that array. Its type is a
14f9c5c9
AS
2079 standard GDB array type except that the BITSIZEs of the array
2080 target types are set to the number of bits in each element, and the
4c4b4cd2 2081 type length is set appropriately. */
14f9c5c9 2082
d2e4a39e 2083static struct value *
ad82864c 2084decode_constrained_packed_array (struct value *arr)
14f9c5c9 2085{
4c4b4cd2 2086 struct type *type;
14f9c5c9 2087
4c4b4cd2 2088 arr = ada_coerce_ref (arr);
284614f0
JB
2089
2090 /* If our value is a pointer, then dererence it. Make sure that
2091 this operation does not cause the target type to be fixed, as
2092 this would indirectly cause this array to be decoded. The rest
2093 of the routine assumes that the array hasn't been decoded yet,
2094 so we use the basic "value_ind" routine to perform the dereferencing,
2095 as opposed to using "ada_value_ind". */
828292f2 2096 if (TYPE_CODE (ada_check_typedef (value_type (arr))) == TYPE_CODE_PTR)
284614f0 2097 arr = value_ind (arr);
4c4b4cd2 2098
ad82864c 2099 type = decode_constrained_packed_array_type (value_type (arr));
14f9c5c9
AS
2100 if (type == NULL)
2101 {
323e0a4a 2102 error (_("can't unpack array"));
14f9c5c9
AS
2103 return NULL;
2104 }
61ee279c 2105
50810684 2106 if (gdbarch_bits_big_endian (get_type_arch (value_type (arr)))
32c9a795 2107 && ada_is_modular_type (value_type (arr)))
61ee279c
PH
2108 {
2109 /* This is a (right-justified) modular type representing a packed
2110 array with no wrapper. In order to interpret the value through
2111 the (left-justified) packed array type we just built, we must
2112 first left-justify it. */
2113 int bit_size, bit_pos;
2114 ULONGEST mod;
2115
df407dfe 2116 mod = ada_modulus (value_type (arr)) - 1;
61ee279c
PH
2117 bit_size = 0;
2118 while (mod > 0)
2119 {
2120 bit_size += 1;
2121 mod >>= 1;
2122 }
df407dfe 2123 bit_pos = HOST_CHAR_BIT * TYPE_LENGTH (value_type (arr)) - bit_size;
61ee279c
PH
2124 arr = ada_value_primitive_packed_val (arr, NULL,
2125 bit_pos / HOST_CHAR_BIT,
2126 bit_pos % HOST_CHAR_BIT,
2127 bit_size,
2128 type);
2129 }
2130
4c4b4cd2 2131 return coerce_unspec_val_to_type (arr, type);
14f9c5c9
AS
2132}
2133
2134
2135/* The value of the element of packed array ARR at the ARITY indices
4c4b4cd2 2136 given in IND. ARR must be a simple array. */
14f9c5c9 2137
d2e4a39e
AS
2138static struct value *
2139value_subscript_packed (struct value *arr, int arity, struct value **ind)
14f9c5c9
AS
2140{
2141 int i;
2142 int bits, elt_off, bit_off;
2143 long elt_total_bit_offset;
d2e4a39e
AS
2144 struct type *elt_type;
2145 struct value *v;
14f9c5c9
AS
2146
2147 bits = 0;
2148 elt_total_bit_offset = 0;
df407dfe 2149 elt_type = ada_check_typedef (value_type (arr));
d2e4a39e 2150 for (i = 0; i < arity; i += 1)
14f9c5c9 2151 {
d2e4a39e 2152 if (TYPE_CODE (elt_type) != TYPE_CODE_ARRAY
4c4b4cd2
PH
2153 || TYPE_FIELD_BITSIZE (elt_type, 0) == 0)
2154 error
0963b4bd
MS
2155 (_("attempt to do packed indexing of "
2156 "something other than a packed array"));
14f9c5c9 2157 else
4c4b4cd2
PH
2158 {
2159 struct type *range_type = TYPE_INDEX_TYPE (elt_type);
2160 LONGEST lowerbound, upperbound;
2161 LONGEST idx;
2162
2163 if (get_discrete_bounds (range_type, &lowerbound, &upperbound) < 0)
2164 {
323e0a4a 2165 lim_warning (_("don't know bounds of array"));
4c4b4cd2
PH
2166 lowerbound = upperbound = 0;
2167 }
2168
3cb382c9 2169 idx = pos_atr (ind[i]);
4c4b4cd2 2170 if (idx < lowerbound || idx > upperbound)
0963b4bd
MS
2171 lim_warning (_("packed array index %ld out of bounds"),
2172 (long) idx);
4c4b4cd2
PH
2173 bits = TYPE_FIELD_BITSIZE (elt_type, 0);
2174 elt_total_bit_offset += (idx - lowerbound) * bits;
61ee279c 2175 elt_type = ada_check_typedef (TYPE_TARGET_TYPE (elt_type));
4c4b4cd2 2176 }
14f9c5c9
AS
2177 }
2178 elt_off = elt_total_bit_offset / HOST_CHAR_BIT;
2179 bit_off = elt_total_bit_offset % HOST_CHAR_BIT;
d2e4a39e
AS
2180
2181 v = ada_value_primitive_packed_val (arr, NULL, elt_off, bit_off,
4c4b4cd2 2182 bits, elt_type);
14f9c5c9
AS
2183 return v;
2184}
2185
4c4b4cd2 2186/* Non-zero iff TYPE includes negative integer values. */
14f9c5c9
AS
2187
2188static int
d2e4a39e 2189has_negatives (struct type *type)
14f9c5c9 2190{
d2e4a39e
AS
2191 switch (TYPE_CODE (type))
2192 {
2193 default:
2194 return 0;
2195 case TYPE_CODE_INT:
2196 return !TYPE_UNSIGNED (type);
2197 case TYPE_CODE_RANGE:
2198 return TYPE_LOW_BOUND (type) < 0;
2199 }
14f9c5c9 2200}
d2e4a39e 2201
14f9c5c9
AS
2202
2203/* Create a new value of type TYPE from the contents of OBJ starting
2204 at byte OFFSET, and bit offset BIT_OFFSET within that byte,
2205 proceeding for BIT_SIZE bits. If OBJ is an lval in memory, then
0963b4bd 2206 assigning through the result will set the field fetched from.
4c4b4cd2
PH
2207 VALADDR is ignored unless OBJ is NULL, in which case,
2208 VALADDR+OFFSET must address the start of storage containing the
2209 packed value. The value returned in this case is never an lval.
2210 Assumes 0 <= BIT_OFFSET < HOST_CHAR_BIT. */
14f9c5c9 2211
d2e4a39e 2212struct value *
fc1a4b47 2213ada_value_primitive_packed_val (struct value *obj, const gdb_byte *valaddr,
a2bd3dcd 2214 long offset, int bit_offset, int bit_size,
4c4b4cd2 2215 struct type *type)
14f9c5c9 2216{
d2e4a39e 2217 struct value *v;
4c4b4cd2
PH
2218 int src, /* Index into the source area */
2219 targ, /* Index into the target area */
2220 srcBitsLeft, /* Number of source bits left to move */
2221 nsrc, ntarg, /* Number of source and target bytes */
2222 unusedLS, /* Number of bits in next significant
2223 byte of source that are unused */
2224 accumSize; /* Number of meaningful bits in accum */
2225 unsigned char *bytes; /* First byte containing data to unpack */
d2e4a39e 2226 unsigned char *unpacked;
4c4b4cd2 2227 unsigned long accum; /* Staging area for bits being transferred */
14f9c5c9
AS
2228 unsigned char sign;
2229 int len = (bit_size + bit_offset + HOST_CHAR_BIT - 1) / 8;
4c4b4cd2
PH
2230 /* Transmit bytes from least to most significant; delta is the direction
2231 the indices move. */
50810684 2232 int delta = gdbarch_bits_big_endian (get_type_arch (type)) ? -1 : 1;
14f9c5c9 2233
61ee279c 2234 type = ada_check_typedef (type);
14f9c5c9
AS
2235
2236 if (obj == NULL)
2237 {
2238 v = allocate_value (type);
d2e4a39e 2239 bytes = (unsigned char *) (valaddr + offset);
14f9c5c9 2240 }
9214ee5f 2241 else if (VALUE_LVAL (obj) == lval_memory && value_lazy (obj))
14f9c5c9
AS
2242 {
2243 v = value_at (type,
42ae5230 2244 value_address (obj) + offset);
d2e4a39e 2245 bytes = (unsigned char *) alloca (len);
42ae5230 2246 read_memory (value_address (v), bytes, len);
14f9c5c9 2247 }
d2e4a39e 2248 else
14f9c5c9
AS
2249 {
2250 v = allocate_value (type);
0fd88904 2251 bytes = (unsigned char *) value_contents (obj) + offset;
14f9c5c9 2252 }
d2e4a39e
AS
2253
2254 if (obj != NULL)
14f9c5c9 2255 {
42ae5230 2256 CORE_ADDR new_addr;
5b4ee69b 2257
74bcbdf3 2258 set_value_component_location (v, obj);
42ae5230 2259 new_addr = value_address (obj) + offset;
9bbda503
AC
2260 set_value_bitpos (v, bit_offset + value_bitpos (obj));
2261 set_value_bitsize (v, bit_size);
df407dfe 2262 if (value_bitpos (v) >= HOST_CHAR_BIT)
4c4b4cd2 2263 {
42ae5230 2264 ++new_addr;
9bbda503 2265 set_value_bitpos (v, value_bitpos (v) - HOST_CHAR_BIT);
4c4b4cd2 2266 }
42ae5230 2267 set_value_address (v, new_addr);
14f9c5c9
AS
2268 }
2269 else
9bbda503 2270 set_value_bitsize (v, bit_size);
0fd88904 2271 unpacked = (unsigned char *) value_contents (v);
14f9c5c9
AS
2272
2273 srcBitsLeft = bit_size;
2274 nsrc = len;
2275 ntarg = TYPE_LENGTH (type);
2276 sign = 0;
2277 if (bit_size == 0)
2278 {
2279 memset (unpacked, 0, TYPE_LENGTH (type));
2280 return v;
2281 }
50810684 2282 else if (gdbarch_bits_big_endian (get_type_arch (type)))
14f9c5c9 2283 {
d2e4a39e 2284 src = len - 1;
1265e4aa
JB
2285 if (has_negatives (type)
2286 && ((bytes[0] << bit_offset) & (1 << (HOST_CHAR_BIT - 1))))
4c4b4cd2 2287 sign = ~0;
d2e4a39e
AS
2288
2289 unusedLS =
4c4b4cd2
PH
2290 (HOST_CHAR_BIT - (bit_size + bit_offset) % HOST_CHAR_BIT)
2291 % HOST_CHAR_BIT;
14f9c5c9
AS
2292
2293 switch (TYPE_CODE (type))
4c4b4cd2
PH
2294 {
2295 case TYPE_CODE_ARRAY:
2296 case TYPE_CODE_UNION:
2297 case TYPE_CODE_STRUCT:
2298 /* Non-scalar values must be aligned at a byte boundary... */
2299 accumSize =
2300 (HOST_CHAR_BIT - bit_size % HOST_CHAR_BIT) % HOST_CHAR_BIT;
2301 /* ... And are placed at the beginning (most-significant) bytes
2302 of the target. */
529cad9c 2303 targ = (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT - 1;
0056e4d5 2304 ntarg = targ + 1;
4c4b4cd2
PH
2305 break;
2306 default:
2307 accumSize = 0;
2308 targ = TYPE_LENGTH (type) - 1;
2309 break;
2310 }
14f9c5c9 2311 }
d2e4a39e 2312 else
14f9c5c9
AS
2313 {
2314 int sign_bit_offset = (bit_size + bit_offset - 1) % 8;
2315
2316 src = targ = 0;
2317 unusedLS = bit_offset;
2318 accumSize = 0;
2319
d2e4a39e 2320 if (has_negatives (type) && (bytes[len - 1] & (1 << sign_bit_offset)))
4c4b4cd2 2321 sign = ~0;
14f9c5c9 2322 }
d2e4a39e 2323
14f9c5c9
AS
2324 accum = 0;
2325 while (nsrc > 0)
2326 {
2327 /* Mask for removing bits of the next source byte that are not
4c4b4cd2 2328 part of the value. */
d2e4a39e 2329 unsigned int unusedMSMask =
4c4b4cd2
PH
2330 (1 << (srcBitsLeft >= HOST_CHAR_BIT ? HOST_CHAR_BIT : srcBitsLeft)) -
2331 1;
2332 /* Sign-extend bits for this byte. */
14f9c5c9 2333 unsigned int signMask = sign & ~unusedMSMask;
5b4ee69b 2334
d2e4a39e 2335 accum |=
4c4b4cd2 2336 (((bytes[src] >> unusedLS) & unusedMSMask) | signMask) << accumSize;
14f9c5c9 2337 accumSize += HOST_CHAR_BIT - unusedLS;
d2e4a39e 2338 if (accumSize >= HOST_CHAR_BIT)
4c4b4cd2
PH
2339 {
2340 unpacked[targ] = accum & ~(~0L << HOST_CHAR_BIT);
2341 accumSize -= HOST_CHAR_BIT;
2342 accum >>= HOST_CHAR_BIT;
2343 ntarg -= 1;
2344 targ += delta;
2345 }
14f9c5c9
AS
2346 srcBitsLeft -= HOST_CHAR_BIT - unusedLS;
2347 unusedLS = 0;
2348 nsrc -= 1;
2349 src += delta;
2350 }
2351 while (ntarg > 0)
2352 {
2353 accum |= sign << accumSize;
2354 unpacked[targ] = accum & ~(~0L << HOST_CHAR_BIT);
2355 accumSize -= HOST_CHAR_BIT;
2356 accum >>= HOST_CHAR_BIT;
2357 ntarg -= 1;
2358 targ += delta;
2359 }
2360
2361 return v;
2362}
d2e4a39e 2363
14f9c5c9
AS
2364/* Move N bits from SOURCE, starting at bit offset SRC_OFFSET to
2365 TARGET, starting at bit offset TARG_OFFSET. SOURCE and TARGET must
4c4b4cd2 2366 not overlap. */
14f9c5c9 2367static void
fc1a4b47 2368move_bits (gdb_byte *target, int targ_offset, const gdb_byte *source,
50810684 2369 int src_offset, int n, int bits_big_endian_p)
14f9c5c9
AS
2370{
2371 unsigned int accum, mask;
2372 int accum_bits, chunk_size;
2373
2374 target += targ_offset / HOST_CHAR_BIT;
2375 targ_offset %= HOST_CHAR_BIT;
2376 source += src_offset / HOST_CHAR_BIT;
2377 src_offset %= HOST_CHAR_BIT;
50810684 2378 if (bits_big_endian_p)
14f9c5c9
AS
2379 {
2380 accum = (unsigned char) *source;
2381 source += 1;
2382 accum_bits = HOST_CHAR_BIT - src_offset;
2383
d2e4a39e 2384 while (n > 0)
4c4b4cd2
PH
2385 {
2386 int unused_right;
5b4ee69b 2387
4c4b4cd2
PH
2388 accum = (accum << HOST_CHAR_BIT) + (unsigned char) *source;
2389 accum_bits += HOST_CHAR_BIT;
2390 source += 1;
2391 chunk_size = HOST_CHAR_BIT - targ_offset;
2392 if (chunk_size > n)
2393 chunk_size = n;
2394 unused_right = HOST_CHAR_BIT - (chunk_size + targ_offset);
2395 mask = ((1 << chunk_size) - 1) << unused_right;
2396 *target =
2397 (*target & ~mask)
2398 | ((accum >> (accum_bits - chunk_size - unused_right)) & mask);
2399 n -= chunk_size;
2400 accum_bits -= chunk_size;
2401 target += 1;
2402 targ_offset = 0;
2403 }
14f9c5c9
AS
2404 }
2405 else
2406 {
2407 accum = (unsigned char) *source >> src_offset;
2408 source += 1;
2409 accum_bits = HOST_CHAR_BIT - src_offset;
2410
d2e4a39e 2411 while (n > 0)
4c4b4cd2
PH
2412 {
2413 accum = accum + ((unsigned char) *source << accum_bits);
2414 accum_bits += HOST_CHAR_BIT;
2415 source += 1;
2416 chunk_size = HOST_CHAR_BIT - targ_offset;
2417 if (chunk_size > n)
2418 chunk_size = n;
2419 mask = ((1 << chunk_size) - 1) << targ_offset;
2420 *target = (*target & ~mask) | ((accum << targ_offset) & mask);
2421 n -= chunk_size;
2422 accum_bits -= chunk_size;
2423 accum >>= chunk_size;
2424 target += 1;
2425 targ_offset = 0;
2426 }
14f9c5c9
AS
2427 }
2428}
2429
14f9c5c9
AS
2430/* Store the contents of FROMVAL into the location of TOVAL.
2431 Return a new value with the location of TOVAL and contents of
2432 FROMVAL. Handles assignment into packed fields that have
4c4b4cd2 2433 floating-point or non-scalar types. */
14f9c5c9 2434
d2e4a39e
AS
2435static struct value *
2436ada_value_assign (struct value *toval, struct value *fromval)
14f9c5c9 2437{
df407dfe
AC
2438 struct type *type = value_type (toval);
2439 int bits = value_bitsize (toval);
14f9c5c9 2440
52ce6436
PH
2441 toval = ada_coerce_ref (toval);
2442 fromval = ada_coerce_ref (fromval);
2443
2444 if (ada_is_direct_array_type (value_type (toval)))
2445 toval = ada_coerce_to_simple_array (toval);
2446 if (ada_is_direct_array_type (value_type (fromval)))
2447 fromval = ada_coerce_to_simple_array (fromval);
2448
88e3b34b 2449 if (!deprecated_value_modifiable (toval))
323e0a4a 2450 error (_("Left operand of assignment is not a modifiable lvalue."));
14f9c5c9 2451
d2e4a39e 2452 if (VALUE_LVAL (toval) == lval_memory
14f9c5c9 2453 && bits > 0
d2e4a39e 2454 && (TYPE_CODE (type) == TYPE_CODE_FLT
4c4b4cd2 2455 || TYPE_CODE (type) == TYPE_CODE_STRUCT))
14f9c5c9 2456 {
df407dfe
AC
2457 int len = (value_bitpos (toval)
2458 + bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT;
aced2898 2459 int from_size;
d2e4a39e
AS
2460 char *buffer = (char *) alloca (len);
2461 struct value *val;
42ae5230 2462 CORE_ADDR to_addr = value_address (toval);
14f9c5c9
AS
2463
2464 if (TYPE_CODE (type) == TYPE_CODE_FLT)
4c4b4cd2 2465 fromval = value_cast (type, fromval);
14f9c5c9 2466
52ce6436 2467 read_memory (to_addr, buffer, len);
aced2898
PH
2468 from_size = value_bitsize (fromval);
2469 if (from_size == 0)
2470 from_size = TYPE_LENGTH (value_type (fromval)) * TARGET_CHAR_BIT;
50810684 2471 if (gdbarch_bits_big_endian (get_type_arch (type)))
df407dfe 2472 move_bits (buffer, value_bitpos (toval),
50810684 2473 value_contents (fromval), from_size - bits, bits, 1);
14f9c5c9 2474 else
50810684
UW
2475 move_bits (buffer, value_bitpos (toval),
2476 value_contents (fromval), 0, bits, 0);
52ce6436 2477 write_memory (to_addr, buffer, len);
8cebebb9
PP
2478 observer_notify_memory_changed (to_addr, len, buffer);
2479
14f9c5c9 2480 val = value_copy (toval);
0fd88904 2481 memcpy (value_contents_raw (val), value_contents (fromval),
4c4b4cd2 2482 TYPE_LENGTH (type));
04624583 2483 deprecated_set_value_type (val, type);
d2e4a39e 2484
14f9c5c9
AS
2485 return val;
2486 }
2487
2488 return value_assign (toval, fromval);
2489}
2490
2491
52ce6436
PH
2492/* Given that COMPONENT is a memory lvalue that is part of the lvalue
2493 * CONTAINER, assign the contents of VAL to COMPONENTS's place in
2494 * CONTAINER. Modifies the VALUE_CONTENTS of CONTAINER only, not
2495 * COMPONENT, and not the inferior's memory. The current contents
2496 * of COMPONENT are ignored. */
2497static void
2498value_assign_to_component (struct value *container, struct value *component,
2499 struct value *val)
2500{
2501 LONGEST offset_in_container =
42ae5230 2502 (LONGEST) (value_address (component) - value_address (container));
52ce6436
PH
2503 int bit_offset_in_container =
2504 value_bitpos (component) - value_bitpos (container);
2505 int bits;
2506
2507 val = value_cast (value_type (component), val);
2508
2509 if (value_bitsize (component) == 0)
2510 bits = TARGET_CHAR_BIT * TYPE_LENGTH (value_type (component));
2511 else
2512 bits = value_bitsize (component);
2513
50810684 2514 if (gdbarch_bits_big_endian (get_type_arch (value_type (container))))
52ce6436
PH
2515 move_bits (value_contents_writeable (container) + offset_in_container,
2516 value_bitpos (container) + bit_offset_in_container,
2517 value_contents (val),
2518 TYPE_LENGTH (value_type (component)) * TARGET_CHAR_BIT - bits,
50810684 2519 bits, 1);
52ce6436
PH
2520 else
2521 move_bits (value_contents_writeable (container) + offset_in_container,
2522 value_bitpos (container) + bit_offset_in_container,
50810684 2523 value_contents (val), 0, bits, 0);
52ce6436
PH
2524}
2525
4c4b4cd2
PH
2526/* The value of the element of array ARR at the ARITY indices given in IND.
2527 ARR may be either a simple array, GNAT array descriptor, or pointer
14f9c5c9
AS
2528 thereto. */
2529
d2e4a39e
AS
2530struct value *
2531ada_value_subscript (struct value *arr, int arity, struct value **ind)
14f9c5c9
AS
2532{
2533 int k;
d2e4a39e
AS
2534 struct value *elt;
2535 struct type *elt_type;
14f9c5c9
AS
2536
2537 elt = ada_coerce_to_simple_array (arr);
2538
df407dfe 2539 elt_type = ada_check_typedef (value_type (elt));
d2e4a39e 2540 if (TYPE_CODE (elt_type) == TYPE_CODE_ARRAY
14f9c5c9
AS
2541 && TYPE_FIELD_BITSIZE (elt_type, 0) > 0)
2542 return value_subscript_packed (elt, arity, ind);
2543
2544 for (k = 0; k < arity; k += 1)
2545 {
2546 if (TYPE_CODE (elt_type) != TYPE_CODE_ARRAY)
323e0a4a 2547 error (_("too many subscripts (%d expected)"), k);
2497b498 2548 elt = value_subscript (elt, pos_atr (ind[k]));
14f9c5c9
AS
2549 }
2550 return elt;
2551}
2552
2553/* Assuming ARR is a pointer to a standard GDB array of type TYPE, the
2554 value of the element of *ARR at the ARITY indices given in
4c4b4cd2 2555 IND. Does not read the entire array into memory. */
14f9c5c9 2556
2c0b251b 2557static struct value *
d2e4a39e 2558ada_value_ptr_subscript (struct value *arr, struct type *type, int arity,
4c4b4cd2 2559 struct value **ind)
14f9c5c9
AS
2560{
2561 int k;
2562
2563 for (k = 0; k < arity; k += 1)
2564 {
2565 LONGEST lwb, upb;
14f9c5c9
AS
2566
2567 if (TYPE_CODE (type) != TYPE_CODE_ARRAY)
323e0a4a 2568 error (_("too many subscripts (%d expected)"), k);
d2e4a39e 2569 arr = value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
4c4b4cd2 2570 value_copy (arr));
14f9c5c9 2571 get_discrete_bounds (TYPE_INDEX_TYPE (type), &lwb, &upb);
2497b498 2572 arr = value_ptradd (arr, pos_atr (ind[k]) - lwb);
14f9c5c9
AS
2573 type = TYPE_TARGET_TYPE (type);
2574 }
2575
2576 return value_ind (arr);
2577}
2578
0b5d8877 2579/* Given that ARRAY_PTR is a pointer or reference to an array of type TYPE (the
f5938064
JG
2580 actual type of ARRAY_PTR is ignored), returns the Ada slice of HIGH-LOW+1
2581 elements starting at index LOW. The lower bound of this array is LOW, as
0963b4bd 2582 per Ada rules. */
0b5d8877 2583static struct value *
f5938064
JG
2584ada_value_slice_from_ptr (struct value *array_ptr, struct type *type,
2585 int low, int high)
0b5d8877 2586{
b0dd7688 2587 struct type *type0 = ada_check_typedef (type);
6c038f32 2588 CORE_ADDR base = value_as_address (array_ptr)
b0dd7688
JB
2589 + ((low - ada_discrete_type_low_bound (TYPE_INDEX_TYPE (type0)))
2590 * TYPE_LENGTH (TYPE_TARGET_TYPE (type0)));
6c038f32 2591 struct type *index_type =
b0dd7688 2592 create_range_type (NULL, TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (type0)),
0b5d8877 2593 low, high);
6c038f32 2594 struct type *slice_type =
b0dd7688 2595 create_array_type (NULL, TYPE_TARGET_TYPE (type0), index_type);
5b4ee69b 2596
f5938064 2597 return value_at_lazy (slice_type, base);
0b5d8877
PH
2598}
2599
2600
2601static struct value *
2602ada_value_slice (struct value *array, int low, int high)
2603{
b0dd7688 2604 struct type *type = ada_check_typedef (value_type (array));
6c038f32 2605 struct type *index_type =
0b5d8877 2606 create_range_type (NULL, TYPE_INDEX_TYPE (type), low, high);
6c038f32 2607 struct type *slice_type =
0b5d8877 2608 create_array_type (NULL, TYPE_TARGET_TYPE (type), index_type);
5b4ee69b 2609
6c038f32 2610 return value_cast (slice_type, value_slice (array, low, high - low + 1));
0b5d8877
PH
2611}
2612
14f9c5c9
AS
2613/* If type is a record type in the form of a standard GNAT array
2614 descriptor, returns the number of dimensions for type. If arr is a
2615 simple array, returns the number of "array of"s that prefix its
4c4b4cd2 2616 type designation. Otherwise, returns 0. */
14f9c5c9
AS
2617
2618int
d2e4a39e 2619ada_array_arity (struct type *type)
14f9c5c9
AS
2620{
2621 int arity;
2622
2623 if (type == NULL)
2624 return 0;
2625
2626 type = desc_base_type (type);
2627
2628 arity = 0;
d2e4a39e 2629 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
14f9c5c9 2630 return desc_arity (desc_bounds_type (type));
d2e4a39e
AS
2631 else
2632 while (TYPE_CODE (type) == TYPE_CODE_ARRAY)
14f9c5c9 2633 {
4c4b4cd2 2634 arity += 1;
61ee279c 2635 type = ada_check_typedef (TYPE_TARGET_TYPE (type));
14f9c5c9 2636 }
d2e4a39e 2637
14f9c5c9
AS
2638 return arity;
2639}
2640
2641/* If TYPE is a record type in the form of a standard GNAT array
2642 descriptor or a simple array type, returns the element type for
2643 TYPE after indexing by NINDICES indices, or by all indices if
4c4b4cd2 2644 NINDICES is -1. Otherwise, returns NULL. */
14f9c5c9 2645
d2e4a39e
AS
2646struct type *
2647ada_array_element_type (struct type *type, int nindices)
14f9c5c9
AS
2648{
2649 type = desc_base_type (type);
2650
d2e4a39e 2651 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
14f9c5c9
AS
2652 {
2653 int k;
d2e4a39e 2654 struct type *p_array_type;
14f9c5c9 2655
556bdfd4 2656 p_array_type = desc_data_target_type (type);
14f9c5c9
AS
2657
2658 k = ada_array_arity (type);
2659 if (k == 0)
4c4b4cd2 2660 return NULL;
d2e4a39e 2661
4c4b4cd2 2662 /* Initially p_array_type = elt_type(*)[]...(k times)...[]. */
14f9c5c9 2663 if (nindices >= 0 && k > nindices)
4c4b4cd2 2664 k = nindices;
d2e4a39e 2665 while (k > 0 && p_array_type != NULL)
4c4b4cd2 2666 {
61ee279c 2667 p_array_type = ada_check_typedef (TYPE_TARGET_TYPE (p_array_type));
4c4b4cd2
PH
2668 k -= 1;
2669 }
14f9c5c9
AS
2670 return p_array_type;
2671 }
2672 else if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
2673 {
2674 while (nindices != 0 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
4c4b4cd2
PH
2675 {
2676 type = TYPE_TARGET_TYPE (type);
2677 nindices -= 1;
2678 }
14f9c5c9
AS
2679 return type;
2680 }
2681
2682 return NULL;
2683}
2684
4c4b4cd2 2685/* The type of nth index in arrays of given type (n numbering from 1).
dd19d49e
UW
2686 Does not examine memory. Throws an error if N is invalid or TYPE
2687 is not an array type. NAME is the name of the Ada attribute being
2688 evaluated ('range, 'first, 'last, or 'length); it is used in building
2689 the error message. */
14f9c5c9 2690
1eea4ebd
UW
2691static struct type *
2692ada_index_type (struct type *type, int n, const char *name)
14f9c5c9 2693{
4c4b4cd2
PH
2694 struct type *result_type;
2695
14f9c5c9
AS
2696 type = desc_base_type (type);
2697
1eea4ebd
UW
2698 if (n < 0 || n > ada_array_arity (type))
2699 error (_("invalid dimension number to '%s"), name);
14f9c5c9 2700
4c4b4cd2 2701 if (ada_is_simple_array_type (type))
14f9c5c9
AS
2702 {
2703 int i;
2704
2705 for (i = 1; i < n; i += 1)
4c4b4cd2 2706 type = TYPE_TARGET_TYPE (type);
262452ec 2707 result_type = TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (type));
4c4b4cd2
PH
2708 /* FIXME: The stabs type r(0,0);bound;bound in an array type
2709 has a target type of TYPE_CODE_UNDEF. We compensate here, but
76a01679 2710 perhaps stabsread.c would make more sense. */
1eea4ebd
UW
2711 if (result_type && TYPE_CODE (result_type) == TYPE_CODE_UNDEF)
2712 result_type = NULL;
14f9c5c9 2713 }
d2e4a39e 2714 else
1eea4ebd
UW
2715 {
2716 result_type = desc_index_type (desc_bounds_type (type), n);
2717 if (result_type == NULL)
2718 error (_("attempt to take bound of something that is not an array"));
2719 }
2720
2721 return result_type;
14f9c5c9
AS
2722}
2723
2724/* Given that arr is an array type, returns the lower bound of the
2725 Nth index (numbering from 1) if WHICH is 0, and the upper bound if
4c4b4cd2 2726 WHICH is 1. This returns bounds 0 .. -1 if ARR_TYPE is an
1eea4ebd
UW
2727 array-descriptor type. It works for other arrays with bounds supplied
2728 by run-time quantities other than discriminants. */
14f9c5c9 2729
abb68b3e 2730static LONGEST
1eea4ebd 2731ada_array_bound_from_type (struct type * arr_type, int n, int which)
14f9c5c9 2732{
1ce677a4 2733 struct type *type, *elt_type, *index_type_desc, *index_type;
1ce677a4 2734 int i;
262452ec
JK
2735
2736 gdb_assert (which == 0 || which == 1);
14f9c5c9 2737
ad82864c
JB
2738 if (ada_is_constrained_packed_array_type (arr_type))
2739 arr_type = decode_constrained_packed_array_type (arr_type);
14f9c5c9 2740
4c4b4cd2 2741 if (arr_type == NULL || !ada_is_simple_array_type (arr_type))
1eea4ebd 2742 return (LONGEST) - which;
14f9c5c9
AS
2743
2744 if (TYPE_CODE (arr_type) == TYPE_CODE_PTR)
2745 type = TYPE_TARGET_TYPE (arr_type);
2746 else
2747 type = arr_type;
2748
1ce677a4
UW
2749 elt_type = type;
2750 for (i = n; i > 1; i--)
2751 elt_type = TYPE_TARGET_TYPE (type);
2752
14f9c5c9 2753 index_type_desc = ada_find_parallel_type (type, "___XA");
28c85d6c 2754 ada_fixup_array_indexes_type (index_type_desc);
262452ec 2755 if (index_type_desc != NULL)
28c85d6c
JB
2756 index_type = to_fixed_range_type (TYPE_FIELD_TYPE (index_type_desc, n - 1),
2757 NULL);
262452ec 2758 else
1ce677a4 2759 index_type = TYPE_INDEX_TYPE (elt_type);
262452ec 2760
43bbcdc2
PH
2761 return
2762 (LONGEST) (which == 0
2763 ? ada_discrete_type_low_bound (index_type)
2764 : ada_discrete_type_high_bound (index_type));
14f9c5c9
AS
2765}
2766
2767/* Given that arr is an array value, returns the lower bound of the
abb68b3e
JB
2768 nth index (numbering from 1) if WHICH is 0, and the upper bound if
2769 WHICH is 1. This routine will also work for arrays with bounds
4c4b4cd2 2770 supplied by run-time quantities other than discriminants. */
14f9c5c9 2771
1eea4ebd 2772static LONGEST
4dc81987 2773ada_array_bound (struct value *arr, int n, int which)
14f9c5c9 2774{
df407dfe 2775 struct type *arr_type = value_type (arr);
14f9c5c9 2776
ad82864c
JB
2777 if (ada_is_constrained_packed_array_type (arr_type))
2778 return ada_array_bound (decode_constrained_packed_array (arr), n, which);
4c4b4cd2 2779 else if (ada_is_simple_array_type (arr_type))
1eea4ebd 2780 return ada_array_bound_from_type (arr_type, n, which);
14f9c5c9 2781 else
1eea4ebd 2782 return value_as_long (desc_one_bound (desc_bounds (arr), n, which));
14f9c5c9
AS
2783}
2784
2785/* Given that arr is an array value, returns the length of the
2786 nth index. This routine will also work for arrays with bounds
4c4b4cd2
PH
2787 supplied by run-time quantities other than discriminants.
2788 Does not work for arrays indexed by enumeration types with representation
2789 clauses at the moment. */
14f9c5c9 2790
1eea4ebd 2791static LONGEST
d2e4a39e 2792ada_array_length (struct value *arr, int n)
14f9c5c9 2793{
df407dfe 2794 struct type *arr_type = ada_check_typedef (value_type (arr));
14f9c5c9 2795
ad82864c
JB
2796 if (ada_is_constrained_packed_array_type (arr_type))
2797 return ada_array_length (decode_constrained_packed_array (arr), n);
14f9c5c9 2798
4c4b4cd2 2799 if (ada_is_simple_array_type (arr_type))
1eea4ebd
UW
2800 return (ada_array_bound_from_type (arr_type, n, 1)
2801 - ada_array_bound_from_type (arr_type, n, 0) + 1);
14f9c5c9 2802 else
1eea4ebd
UW
2803 return (value_as_long (desc_one_bound (desc_bounds (arr), n, 1))
2804 - value_as_long (desc_one_bound (desc_bounds (arr), n, 0)) + 1);
4c4b4cd2
PH
2805}
2806
2807/* An empty array whose type is that of ARR_TYPE (an array type),
2808 with bounds LOW to LOW-1. */
2809
2810static struct value *
2811empty_array (struct type *arr_type, int low)
2812{
b0dd7688 2813 struct type *arr_type0 = ada_check_typedef (arr_type);
6c038f32 2814 struct type *index_type =
b0dd7688 2815 create_range_type (NULL, TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (arr_type0)),
0b5d8877 2816 low, low - 1);
b0dd7688 2817 struct type *elt_type = ada_array_element_type (arr_type0, 1);
5b4ee69b 2818
0b5d8877 2819 return allocate_value (create_array_type (NULL, elt_type, index_type));
14f9c5c9 2820}
14f9c5c9 2821\f
d2e4a39e 2822
4c4b4cd2 2823 /* Name resolution */
14f9c5c9 2824
4c4b4cd2
PH
2825/* The "decoded" name for the user-definable Ada operator corresponding
2826 to OP. */
14f9c5c9 2827
d2e4a39e 2828static const char *
4c4b4cd2 2829ada_decoded_op_name (enum exp_opcode op)
14f9c5c9
AS
2830{
2831 int i;
2832
4c4b4cd2 2833 for (i = 0; ada_opname_table[i].encoded != NULL; i += 1)
14f9c5c9
AS
2834 {
2835 if (ada_opname_table[i].op == op)
4c4b4cd2 2836 return ada_opname_table[i].decoded;
14f9c5c9 2837 }
323e0a4a 2838 error (_("Could not find operator name for opcode"));
14f9c5c9
AS
2839}
2840
2841
4c4b4cd2
PH
2842/* Same as evaluate_type (*EXP), but resolves ambiguous symbol
2843 references (marked by OP_VAR_VALUE nodes in which the symbol has an
2844 undefined namespace) and converts operators that are
2845 user-defined into appropriate function calls. If CONTEXT_TYPE is
14f9c5c9
AS
2846 non-null, it provides a preferred result type [at the moment, only
2847 type void has any effect---causing procedures to be preferred over
2848 functions in calls]. A null CONTEXT_TYPE indicates that a non-void
4c4b4cd2 2849 return type is preferred. May change (expand) *EXP. */
14f9c5c9 2850
4c4b4cd2
PH
2851static void
2852resolve (struct expression **expp, int void_context_p)
14f9c5c9 2853{
30b15541
UW
2854 struct type *context_type = NULL;
2855 int pc = 0;
2856
2857 if (void_context_p)
2858 context_type = builtin_type ((*expp)->gdbarch)->builtin_void;
2859
2860 resolve_subexp (expp, &pc, 1, context_type);
14f9c5c9
AS
2861}
2862
4c4b4cd2
PH
2863/* Resolve the operator of the subexpression beginning at
2864 position *POS of *EXPP. "Resolving" consists of replacing
2865 the symbols that have undefined namespaces in OP_VAR_VALUE nodes
2866 with their resolutions, replacing built-in operators with
2867 function calls to user-defined operators, where appropriate, and,
2868 when DEPROCEDURE_P is non-zero, converting function-valued variables
2869 into parameterless calls. May expand *EXPP. The CONTEXT_TYPE functions
2870 are as in ada_resolve, above. */
14f9c5c9 2871
d2e4a39e 2872static struct value *
4c4b4cd2 2873resolve_subexp (struct expression **expp, int *pos, int deprocedure_p,
76a01679 2874 struct type *context_type)
14f9c5c9
AS
2875{
2876 int pc = *pos;
2877 int i;
4c4b4cd2 2878 struct expression *exp; /* Convenience: == *expp. */
14f9c5c9 2879 enum exp_opcode op = (*expp)->elts[pc].opcode;
4c4b4cd2
PH
2880 struct value **argvec; /* Vector of operand types (alloca'ed). */
2881 int nargs; /* Number of operands. */
52ce6436 2882 int oplen;
14f9c5c9
AS
2883
2884 argvec = NULL;
2885 nargs = 0;
2886 exp = *expp;
2887
52ce6436
PH
2888 /* Pass one: resolve operands, saving their types and updating *pos,
2889 if needed. */
14f9c5c9
AS
2890 switch (op)
2891 {
4c4b4cd2
PH
2892 case OP_FUNCALL:
2893 if (exp->elts[pc + 3].opcode == OP_VAR_VALUE
76a01679
JB
2894 && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN)
2895 *pos += 7;
4c4b4cd2
PH
2896 else
2897 {
2898 *pos += 3;
2899 resolve_subexp (expp, pos, 0, NULL);
2900 }
2901 nargs = longest_to_int (exp->elts[pc + 1].longconst);
14f9c5c9
AS
2902 break;
2903
14f9c5c9 2904 case UNOP_ADDR:
4c4b4cd2
PH
2905 *pos += 1;
2906 resolve_subexp (expp, pos, 0, NULL);
2907 break;
2908
52ce6436
PH
2909 case UNOP_QUAL:
2910 *pos += 3;
17466c1a 2911 resolve_subexp (expp, pos, 1, check_typedef (exp->elts[pc + 1].type));
4c4b4cd2
PH
2912 break;
2913
52ce6436 2914 case OP_ATR_MODULUS:
4c4b4cd2
PH
2915 case OP_ATR_SIZE:
2916 case OP_ATR_TAG:
4c4b4cd2
PH
2917 case OP_ATR_FIRST:
2918 case OP_ATR_LAST:
2919 case OP_ATR_LENGTH:
2920 case OP_ATR_POS:
2921 case OP_ATR_VAL:
4c4b4cd2
PH
2922 case OP_ATR_MIN:
2923 case OP_ATR_MAX:
52ce6436
PH
2924 case TERNOP_IN_RANGE:
2925 case BINOP_IN_BOUNDS:
2926 case UNOP_IN_RANGE:
2927 case OP_AGGREGATE:
2928 case OP_OTHERS:
2929 case OP_CHOICES:
2930 case OP_POSITIONAL:
2931 case OP_DISCRETE_RANGE:
2932 case OP_NAME:
2933 ada_forward_operator_length (exp, pc, &oplen, &nargs);
2934 *pos += oplen;
14f9c5c9
AS
2935 break;
2936
2937 case BINOP_ASSIGN:
2938 {
4c4b4cd2
PH
2939 struct value *arg1;
2940
2941 *pos += 1;
2942 arg1 = resolve_subexp (expp, pos, 0, NULL);
2943 if (arg1 == NULL)
2944 resolve_subexp (expp, pos, 1, NULL);
2945 else
df407dfe 2946 resolve_subexp (expp, pos, 1, value_type (arg1));
4c4b4cd2 2947 break;
14f9c5c9
AS
2948 }
2949
4c4b4cd2 2950 case UNOP_CAST:
4c4b4cd2
PH
2951 *pos += 3;
2952 nargs = 1;
2953 break;
14f9c5c9 2954
4c4b4cd2
PH
2955 case BINOP_ADD:
2956 case BINOP_SUB:
2957 case BINOP_MUL:
2958 case BINOP_DIV:
2959 case BINOP_REM:
2960 case BINOP_MOD:
2961 case BINOP_EXP:
2962 case BINOP_CONCAT:
2963 case BINOP_LOGICAL_AND:
2964 case BINOP_LOGICAL_OR:
2965 case BINOP_BITWISE_AND:
2966 case BINOP_BITWISE_IOR:
2967 case BINOP_BITWISE_XOR:
14f9c5c9 2968
4c4b4cd2
PH
2969 case BINOP_EQUAL:
2970 case BINOP_NOTEQUAL:
2971 case BINOP_LESS:
2972 case BINOP_GTR:
2973 case BINOP_LEQ:
2974 case BINOP_GEQ:
14f9c5c9 2975
4c4b4cd2
PH
2976 case BINOP_REPEAT:
2977 case BINOP_SUBSCRIPT:
2978 case BINOP_COMMA:
40c8aaa9
JB
2979 *pos += 1;
2980 nargs = 2;
2981 break;
14f9c5c9 2982
4c4b4cd2
PH
2983 case UNOP_NEG:
2984 case UNOP_PLUS:
2985 case UNOP_LOGICAL_NOT:
2986 case UNOP_ABS:
2987 case UNOP_IND:
2988 *pos += 1;
2989 nargs = 1;
2990 break;
14f9c5c9 2991
4c4b4cd2
PH
2992 case OP_LONG:
2993 case OP_DOUBLE:
2994 case OP_VAR_VALUE:
2995 *pos += 4;
2996 break;
14f9c5c9 2997
4c4b4cd2
PH
2998 case OP_TYPE:
2999 case OP_BOOL:
3000 case OP_LAST:
4c4b4cd2
PH
3001 case OP_INTERNALVAR:
3002 *pos += 3;
3003 break;
14f9c5c9 3004
4c4b4cd2
PH
3005 case UNOP_MEMVAL:
3006 *pos += 3;
3007 nargs = 1;
3008 break;
3009
67f3407f
DJ
3010 case OP_REGISTER:
3011 *pos += 4 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
3012 break;
3013
4c4b4cd2
PH
3014 case STRUCTOP_STRUCT:
3015 *pos += 4 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
3016 nargs = 1;
3017 break;
3018
4c4b4cd2 3019 case TERNOP_SLICE:
4c4b4cd2
PH
3020 *pos += 1;
3021 nargs = 3;
3022 break;
3023
52ce6436 3024 case OP_STRING:
14f9c5c9 3025 break;
4c4b4cd2
PH
3026
3027 default:
323e0a4a 3028 error (_("Unexpected operator during name resolution"));
14f9c5c9
AS
3029 }
3030
76a01679 3031 argvec = (struct value * *) alloca (sizeof (struct value *) * (nargs + 1));
4c4b4cd2
PH
3032 for (i = 0; i < nargs; i += 1)
3033 argvec[i] = resolve_subexp (expp, pos, 1, NULL);
3034 argvec[i] = NULL;
3035 exp = *expp;
3036
3037 /* Pass two: perform any resolution on principal operator. */
14f9c5c9
AS
3038 switch (op)
3039 {
3040 default:
3041 break;
3042
14f9c5c9 3043 case OP_VAR_VALUE:
4c4b4cd2 3044 if (SYMBOL_DOMAIN (exp->elts[pc + 2].symbol) == UNDEF_DOMAIN)
76a01679
JB
3045 {
3046 struct ada_symbol_info *candidates;
3047 int n_candidates;
3048
3049 n_candidates =
3050 ada_lookup_symbol_list (SYMBOL_LINKAGE_NAME
3051 (exp->elts[pc + 2].symbol),
3052 exp->elts[pc + 1].block, VAR_DOMAIN,
3053 &candidates);
3054
3055 if (n_candidates > 1)
3056 {
3057 /* Types tend to get re-introduced locally, so if there
3058 are any local symbols that are not types, first filter
3059 out all types. */
3060 int j;
3061 for (j = 0; j < n_candidates; j += 1)
3062 switch (SYMBOL_CLASS (candidates[j].sym))
3063 {
3064 case LOC_REGISTER:
3065 case LOC_ARG:
3066 case LOC_REF_ARG:
76a01679
JB
3067 case LOC_REGPARM_ADDR:
3068 case LOC_LOCAL:
76a01679 3069 case LOC_COMPUTED:
76a01679
JB
3070 goto FoundNonType;
3071 default:
3072 break;
3073 }
3074 FoundNonType:
3075 if (j < n_candidates)
3076 {
3077 j = 0;
3078 while (j < n_candidates)
3079 {
3080 if (SYMBOL_CLASS (candidates[j].sym) == LOC_TYPEDEF)
3081 {
3082 candidates[j] = candidates[n_candidates - 1];
3083 n_candidates -= 1;
3084 }
3085 else
3086 j += 1;
3087 }
3088 }
3089 }
3090
3091 if (n_candidates == 0)
323e0a4a 3092 error (_("No definition found for %s"),
76a01679
JB
3093 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
3094 else if (n_candidates == 1)
3095 i = 0;
3096 else if (deprocedure_p
3097 && !is_nonfunction (candidates, n_candidates))
3098 {
06d5cf63
JB
3099 i = ada_resolve_function
3100 (candidates, n_candidates, NULL, 0,
3101 SYMBOL_LINKAGE_NAME (exp->elts[pc + 2].symbol),
3102 context_type);
76a01679 3103 if (i < 0)
323e0a4a 3104 error (_("Could not find a match for %s"),
76a01679
JB
3105 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
3106 }
3107 else
3108 {
323e0a4a 3109 printf_filtered (_("Multiple matches for %s\n"),
76a01679
JB
3110 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
3111 user_select_syms (candidates, n_candidates, 1);
3112 i = 0;
3113 }
3114
3115 exp->elts[pc + 1].block = candidates[i].block;
3116 exp->elts[pc + 2].symbol = candidates[i].sym;
1265e4aa
JB
3117 if (innermost_block == NULL
3118 || contained_in (candidates[i].block, innermost_block))
76a01679
JB
3119 innermost_block = candidates[i].block;
3120 }
3121
3122 if (deprocedure_p
3123 && (TYPE_CODE (SYMBOL_TYPE (exp->elts[pc + 2].symbol))
3124 == TYPE_CODE_FUNC))
3125 {
3126 replace_operator_with_call (expp, pc, 0, 0,
3127 exp->elts[pc + 2].symbol,
3128 exp->elts[pc + 1].block);
3129 exp = *expp;
3130 }
14f9c5c9
AS
3131 break;
3132
3133 case OP_FUNCALL:
3134 {
4c4b4cd2 3135 if (exp->elts[pc + 3].opcode == OP_VAR_VALUE
76a01679 3136 && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN)
4c4b4cd2
PH
3137 {
3138 struct ada_symbol_info *candidates;
3139 int n_candidates;
3140
3141 n_candidates =
76a01679
JB
3142 ada_lookup_symbol_list (SYMBOL_LINKAGE_NAME
3143 (exp->elts[pc + 5].symbol),
3144 exp->elts[pc + 4].block, VAR_DOMAIN,
3145 &candidates);
4c4b4cd2
PH
3146 if (n_candidates == 1)
3147 i = 0;
3148 else
3149 {
06d5cf63
JB
3150 i = ada_resolve_function
3151 (candidates, n_candidates,
3152 argvec, nargs,
3153 SYMBOL_LINKAGE_NAME (exp->elts[pc + 5].symbol),
3154 context_type);
4c4b4cd2 3155 if (i < 0)
323e0a4a 3156 error (_("Could not find a match for %s"),
4c4b4cd2
PH
3157 SYMBOL_PRINT_NAME (exp->elts[pc + 5].symbol));
3158 }
3159
3160 exp->elts[pc + 4].block = candidates[i].block;
3161 exp->elts[pc + 5].symbol = candidates[i].sym;
1265e4aa
JB
3162 if (innermost_block == NULL
3163 || contained_in (candidates[i].block, innermost_block))
4c4b4cd2
PH
3164 innermost_block = candidates[i].block;
3165 }
14f9c5c9
AS
3166 }
3167 break;
3168 case BINOP_ADD:
3169 case BINOP_SUB:
3170 case BINOP_MUL:
3171 case BINOP_DIV:
3172 case BINOP_REM:
3173 case BINOP_MOD:
3174 case BINOP_CONCAT:
3175 case BINOP_BITWISE_AND:
3176 case BINOP_BITWISE_IOR:
3177 case BINOP_BITWISE_XOR:
3178 case BINOP_EQUAL:
3179 case BINOP_NOTEQUAL:
3180 case BINOP_LESS:
3181 case BINOP_GTR:
3182 case BINOP_LEQ:
3183 case BINOP_GEQ:
3184 case BINOP_EXP:
3185 case UNOP_NEG:
3186 case UNOP_PLUS:
3187 case UNOP_LOGICAL_NOT:
3188 case UNOP_ABS:
3189 if (possible_user_operator_p (op, argvec))
4c4b4cd2
PH
3190 {
3191 struct ada_symbol_info *candidates;
3192 int n_candidates;
3193
3194 n_candidates =
3195 ada_lookup_symbol_list (ada_encode (ada_decoded_op_name (op)),
3196 (struct block *) NULL, VAR_DOMAIN,
3197 &candidates);
3198 i = ada_resolve_function (candidates, n_candidates, argvec, nargs,
76a01679 3199 ada_decoded_op_name (op), NULL);
4c4b4cd2
PH
3200 if (i < 0)
3201 break;
3202
76a01679
JB
3203 replace_operator_with_call (expp, pc, nargs, 1,
3204 candidates[i].sym, candidates[i].block);
4c4b4cd2
PH
3205 exp = *expp;
3206 }
14f9c5c9 3207 break;
4c4b4cd2
PH
3208
3209 case OP_TYPE:
b3dbf008 3210 case OP_REGISTER:
4c4b4cd2 3211 return NULL;
14f9c5c9
AS
3212 }
3213
3214 *pos = pc;
3215 return evaluate_subexp_type (exp, pos);
3216}
3217
3218/* Return non-zero if formal type FTYPE matches actual type ATYPE. If
4c4b4cd2 3219 MAY_DEREF is non-zero, the formal may be a pointer and the actual
5b3d5b7d 3220 a non-pointer. */
14f9c5c9 3221/* The term "match" here is rather loose. The match is heuristic and
5b3d5b7d 3222 liberal. */
14f9c5c9
AS
3223
3224static int
4dc81987 3225ada_type_match (struct type *ftype, struct type *atype, int may_deref)
14f9c5c9 3226{
61ee279c
PH
3227 ftype = ada_check_typedef (ftype);
3228 atype = ada_check_typedef (atype);
14f9c5c9
AS
3229
3230 if (TYPE_CODE (ftype) == TYPE_CODE_REF)
3231 ftype = TYPE_TARGET_TYPE (ftype);
3232 if (TYPE_CODE (atype) == TYPE_CODE_REF)
3233 atype = TYPE_TARGET_TYPE (atype);
3234
d2e4a39e 3235 switch (TYPE_CODE (ftype))
14f9c5c9
AS
3236 {
3237 default:
5b3d5b7d 3238 return TYPE_CODE (ftype) == TYPE_CODE (atype);
14f9c5c9
AS
3239 case TYPE_CODE_PTR:
3240 if (TYPE_CODE (atype) == TYPE_CODE_PTR)
4c4b4cd2
PH
3241 return ada_type_match (TYPE_TARGET_TYPE (ftype),
3242 TYPE_TARGET_TYPE (atype), 0);
d2e4a39e 3243 else
1265e4aa
JB
3244 return (may_deref
3245 && ada_type_match (TYPE_TARGET_TYPE (ftype), atype, 0));
14f9c5c9
AS
3246 case TYPE_CODE_INT:
3247 case TYPE_CODE_ENUM:
3248 case TYPE_CODE_RANGE:
3249 switch (TYPE_CODE (atype))
4c4b4cd2
PH
3250 {
3251 case TYPE_CODE_INT:
3252 case TYPE_CODE_ENUM:
3253 case TYPE_CODE_RANGE:
3254 return 1;
3255 default:
3256 return 0;
3257 }
14f9c5c9
AS
3258
3259 case TYPE_CODE_ARRAY:
d2e4a39e 3260 return (TYPE_CODE (atype) == TYPE_CODE_ARRAY
4c4b4cd2 3261 || ada_is_array_descriptor_type (atype));
14f9c5c9
AS
3262
3263 case TYPE_CODE_STRUCT:
4c4b4cd2
PH
3264 if (ada_is_array_descriptor_type (ftype))
3265 return (TYPE_CODE (atype) == TYPE_CODE_ARRAY
3266 || ada_is_array_descriptor_type (atype));
14f9c5c9 3267 else
4c4b4cd2
PH
3268 return (TYPE_CODE (atype) == TYPE_CODE_STRUCT
3269 && !ada_is_array_descriptor_type (atype));
14f9c5c9
AS
3270
3271 case TYPE_CODE_UNION:
3272 case TYPE_CODE_FLT:
3273 return (TYPE_CODE (atype) == TYPE_CODE (ftype));
3274 }
3275}
3276
3277/* Return non-zero if the formals of FUNC "sufficiently match" the
3278 vector of actual argument types ACTUALS of size N_ACTUALS. FUNC
3279 may also be an enumeral, in which case it is treated as a 0-
4c4b4cd2 3280 argument function. */
14f9c5c9
AS
3281
3282static int
d2e4a39e 3283ada_args_match (struct symbol *func, struct value **actuals, int n_actuals)
14f9c5c9
AS
3284{
3285 int i;
d2e4a39e 3286 struct type *func_type = SYMBOL_TYPE (func);
14f9c5c9 3287
1265e4aa
JB
3288 if (SYMBOL_CLASS (func) == LOC_CONST
3289 && TYPE_CODE (func_type) == TYPE_CODE_ENUM)
14f9c5c9
AS
3290 return (n_actuals == 0);
3291 else if (func_type == NULL || TYPE_CODE (func_type) != TYPE_CODE_FUNC)
3292 return 0;
3293
3294 if (TYPE_NFIELDS (func_type) != n_actuals)
3295 return 0;
3296
3297 for (i = 0; i < n_actuals; i += 1)
3298 {
4c4b4cd2 3299 if (actuals[i] == NULL)
76a01679
JB
3300 return 0;
3301 else
3302 {
5b4ee69b
MS
3303 struct type *ftype = ada_check_typedef (TYPE_FIELD_TYPE (func_type,
3304 i));
df407dfe 3305 struct type *atype = ada_check_typedef (value_type (actuals[i]));
4c4b4cd2 3306
76a01679
JB
3307 if (!ada_type_match (ftype, atype, 1))
3308 return 0;
3309 }
14f9c5c9
AS
3310 }
3311 return 1;
3312}
3313
3314/* False iff function type FUNC_TYPE definitely does not produce a value
3315 compatible with type CONTEXT_TYPE. Conservatively returns 1 if
3316 FUNC_TYPE is not a valid function type with a non-null return type
3317 or an enumerated type. A null CONTEXT_TYPE indicates any non-void type. */
3318
3319static int
d2e4a39e 3320return_match (struct type *func_type, struct type *context_type)
14f9c5c9 3321{
d2e4a39e 3322 struct type *return_type;
14f9c5c9
AS
3323
3324 if (func_type == NULL)
3325 return 1;
3326
4c4b4cd2 3327 if (TYPE_CODE (func_type) == TYPE_CODE_FUNC)
18af8284 3328 return_type = get_base_type (TYPE_TARGET_TYPE (func_type));
4c4b4cd2 3329 else
18af8284 3330 return_type = get_base_type (func_type);
14f9c5c9
AS
3331 if (return_type == NULL)
3332 return 1;
3333
18af8284 3334 context_type = get_base_type (context_type);
14f9c5c9
AS
3335
3336 if (TYPE_CODE (return_type) == TYPE_CODE_ENUM)
3337 return context_type == NULL || return_type == context_type;
3338 else if (context_type == NULL)
3339 return TYPE_CODE (return_type) != TYPE_CODE_VOID;
3340 else
3341 return TYPE_CODE (return_type) == TYPE_CODE (context_type);
3342}
3343
3344
4c4b4cd2 3345/* Returns the index in SYMS[0..NSYMS-1] that contains the symbol for the
14f9c5c9 3346 function (if any) that matches the types of the NARGS arguments in
4c4b4cd2
PH
3347 ARGS. If CONTEXT_TYPE is non-null and there is at least one match
3348 that returns that type, then eliminate matches that don't. If
3349 CONTEXT_TYPE is void and there is at least one match that does not
3350 return void, eliminate all matches that do.
3351
14f9c5c9
AS
3352 Asks the user if there is more than one match remaining. Returns -1
3353 if there is no such symbol or none is selected. NAME is used
4c4b4cd2
PH
3354 solely for messages. May re-arrange and modify SYMS in
3355 the process; the index returned is for the modified vector. */
14f9c5c9 3356
4c4b4cd2
PH
3357static int
3358ada_resolve_function (struct ada_symbol_info syms[],
3359 int nsyms, struct value **args, int nargs,
3360 const char *name, struct type *context_type)
14f9c5c9 3361{
30b15541 3362 int fallback;
14f9c5c9 3363 int k;
4c4b4cd2 3364 int m; /* Number of hits */
14f9c5c9 3365
d2e4a39e 3366 m = 0;
30b15541
UW
3367 /* In the first pass of the loop, we only accept functions matching
3368 context_type. If none are found, we add a second pass of the loop
3369 where every function is accepted. */
3370 for (fallback = 0; m == 0 && fallback < 2; fallback++)
14f9c5c9
AS
3371 {
3372 for (k = 0; k < nsyms; k += 1)
4c4b4cd2 3373 {
61ee279c 3374 struct type *type = ada_check_typedef (SYMBOL_TYPE (syms[k].sym));
4c4b4cd2
PH
3375
3376 if (ada_args_match (syms[k].sym, args, nargs)
30b15541 3377 && (fallback || return_match (type, context_type)))
4c4b4cd2
PH
3378 {
3379 syms[m] = syms[k];
3380 m += 1;
3381 }
3382 }
14f9c5c9
AS
3383 }
3384
3385 if (m == 0)
3386 return -1;
3387 else if (m > 1)
3388 {
323e0a4a 3389 printf_filtered (_("Multiple matches for %s\n"), name);
4c4b4cd2 3390 user_select_syms (syms, m, 1);
14f9c5c9
AS
3391 return 0;
3392 }
3393 return 0;
3394}
3395
4c4b4cd2
PH
3396/* Returns true (non-zero) iff decoded name N0 should appear before N1
3397 in a listing of choices during disambiguation (see sort_choices, below).
3398 The idea is that overloadings of a subprogram name from the
3399 same package should sort in their source order. We settle for ordering
3400 such symbols by their trailing number (__N or $N). */
3401
14f9c5c9 3402static int
4c4b4cd2 3403encoded_ordered_before (char *N0, char *N1)
14f9c5c9
AS
3404{
3405 if (N1 == NULL)
3406 return 0;
3407 else if (N0 == NULL)
3408 return 1;
3409 else
3410 {
3411 int k0, k1;
5b4ee69b 3412
d2e4a39e 3413 for (k0 = strlen (N0) - 1; k0 > 0 && isdigit (N0[k0]); k0 -= 1)
4c4b4cd2 3414 ;
d2e4a39e 3415 for (k1 = strlen (N1) - 1; k1 > 0 && isdigit (N1[k1]); k1 -= 1)
4c4b4cd2 3416 ;
d2e4a39e 3417 if ((N0[k0] == '_' || N0[k0] == '$') && N0[k0 + 1] != '\000'
4c4b4cd2
PH
3418 && (N1[k1] == '_' || N1[k1] == '$') && N1[k1 + 1] != '\000')
3419 {
3420 int n0, n1;
5b4ee69b 3421
4c4b4cd2
PH
3422 n0 = k0;
3423 while (N0[n0] == '_' && n0 > 0 && N0[n0 - 1] == '_')
3424 n0 -= 1;
3425 n1 = k1;
3426 while (N1[n1] == '_' && n1 > 0 && N1[n1 - 1] == '_')
3427 n1 -= 1;
3428 if (n0 == n1 && strncmp (N0, N1, n0) == 0)
3429 return (atoi (N0 + k0 + 1) < atoi (N1 + k1 + 1));
3430 }
14f9c5c9
AS
3431 return (strcmp (N0, N1) < 0);
3432 }
3433}
d2e4a39e 3434
4c4b4cd2
PH
3435/* Sort SYMS[0..NSYMS-1] to put the choices in a canonical order by the
3436 encoded names. */
3437
d2e4a39e 3438static void
4c4b4cd2 3439sort_choices (struct ada_symbol_info syms[], int nsyms)
14f9c5c9 3440{
4c4b4cd2 3441 int i;
5b4ee69b 3442
d2e4a39e 3443 for (i = 1; i < nsyms; i += 1)
14f9c5c9 3444 {
4c4b4cd2 3445 struct ada_symbol_info sym = syms[i];
14f9c5c9
AS
3446 int j;
3447
d2e4a39e 3448 for (j = i - 1; j >= 0; j -= 1)
4c4b4cd2
PH
3449 {
3450 if (encoded_ordered_before (SYMBOL_LINKAGE_NAME (syms[j].sym),
3451 SYMBOL_LINKAGE_NAME (sym.sym)))
3452 break;
3453 syms[j + 1] = syms[j];
3454 }
d2e4a39e 3455 syms[j + 1] = sym;
14f9c5c9
AS
3456 }
3457}
3458
4c4b4cd2
PH
3459/* Given a list of NSYMS symbols in SYMS, select up to MAX_RESULTS>0
3460 by asking the user (if necessary), returning the number selected,
3461 and setting the first elements of SYMS items. Error if no symbols
3462 selected. */
14f9c5c9
AS
3463
3464/* NOTE: Adapted from decode_line_2 in symtab.c, with which it ought
4c4b4cd2 3465 to be re-integrated one of these days. */
14f9c5c9
AS
3466
3467int
4c4b4cd2 3468user_select_syms (struct ada_symbol_info *syms, int nsyms, int max_results)
14f9c5c9
AS
3469{
3470 int i;
d2e4a39e 3471 int *chosen = (int *) alloca (sizeof (int) * nsyms);
14f9c5c9
AS
3472 int n_chosen;
3473 int first_choice = (max_results == 1) ? 1 : 2;
717d2f5a 3474 const char *select_mode = multiple_symbols_select_mode ();
14f9c5c9
AS
3475
3476 if (max_results < 1)
323e0a4a 3477 error (_("Request to select 0 symbols!"));
14f9c5c9
AS
3478 if (nsyms <= 1)
3479 return nsyms;
3480
717d2f5a
JB
3481 if (select_mode == multiple_symbols_cancel)
3482 error (_("\
3483canceled because the command is ambiguous\n\
3484See set/show multiple-symbol."));
3485
3486 /* If select_mode is "all", then return all possible symbols.
3487 Only do that if more than one symbol can be selected, of course.
3488 Otherwise, display the menu as usual. */
3489 if (select_mode == multiple_symbols_all && max_results > 1)
3490 return nsyms;
3491
323e0a4a 3492 printf_unfiltered (_("[0] cancel\n"));
14f9c5c9 3493 if (max_results > 1)
323e0a4a 3494 printf_unfiltered (_("[1] all\n"));
14f9c5c9 3495
4c4b4cd2 3496 sort_choices (syms, nsyms);
14f9c5c9
AS
3497
3498 for (i = 0; i < nsyms; i += 1)
3499 {
4c4b4cd2
PH
3500 if (syms[i].sym == NULL)
3501 continue;
3502
3503 if (SYMBOL_CLASS (syms[i].sym) == LOC_BLOCK)
3504 {
76a01679
JB
3505 struct symtab_and_line sal =
3506 find_function_start_sal (syms[i].sym, 1);
5b4ee69b 3507
323e0a4a
AC
3508 if (sal.symtab == NULL)
3509 printf_unfiltered (_("[%d] %s at <no source file available>:%d\n"),
3510 i + first_choice,
3511 SYMBOL_PRINT_NAME (syms[i].sym),
3512 sal.line);
3513 else
3514 printf_unfiltered (_("[%d] %s at %s:%d\n"), i + first_choice,
3515 SYMBOL_PRINT_NAME (syms[i].sym),
3516 sal.symtab->filename, sal.line);
4c4b4cd2
PH
3517 continue;
3518 }
d2e4a39e 3519 else
4c4b4cd2
PH
3520 {
3521 int is_enumeral =
3522 (SYMBOL_CLASS (syms[i].sym) == LOC_CONST
3523 && SYMBOL_TYPE (syms[i].sym) != NULL
3524 && TYPE_CODE (SYMBOL_TYPE (syms[i].sym)) == TYPE_CODE_ENUM);
6f38eac8 3525 struct symtab *symtab = syms[i].sym->symtab;
4c4b4cd2
PH
3526
3527 if (SYMBOL_LINE (syms[i].sym) != 0 && symtab != NULL)
323e0a4a 3528 printf_unfiltered (_("[%d] %s at %s:%d\n"),
4c4b4cd2
PH
3529 i + first_choice,
3530 SYMBOL_PRINT_NAME (syms[i].sym),
3531 symtab->filename, SYMBOL_LINE (syms[i].sym));
76a01679
JB
3532 else if (is_enumeral
3533 && TYPE_NAME (SYMBOL_TYPE (syms[i].sym)) != NULL)
4c4b4cd2 3534 {
a3f17187 3535 printf_unfiltered (("[%d] "), i + first_choice);
76a01679
JB
3536 ada_print_type (SYMBOL_TYPE (syms[i].sym), NULL,
3537 gdb_stdout, -1, 0);
323e0a4a 3538 printf_unfiltered (_("'(%s) (enumeral)\n"),
4c4b4cd2
PH
3539 SYMBOL_PRINT_NAME (syms[i].sym));
3540 }
3541 else if (symtab != NULL)
3542 printf_unfiltered (is_enumeral
323e0a4a
AC
3543 ? _("[%d] %s in %s (enumeral)\n")
3544 : _("[%d] %s at %s:?\n"),
4c4b4cd2
PH
3545 i + first_choice,
3546 SYMBOL_PRINT_NAME (syms[i].sym),
3547 symtab->filename);
3548 else
3549 printf_unfiltered (is_enumeral
323e0a4a
AC
3550 ? _("[%d] %s (enumeral)\n")
3551 : _("[%d] %s at ?\n"),
4c4b4cd2
PH
3552 i + first_choice,
3553 SYMBOL_PRINT_NAME (syms[i].sym));
3554 }
14f9c5c9 3555 }
d2e4a39e 3556
14f9c5c9 3557 n_chosen = get_selections (chosen, nsyms, max_results, max_results > 1,
4c4b4cd2 3558 "overload-choice");
14f9c5c9
AS
3559
3560 for (i = 0; i < n_chosen; i += 1)
4c4b4cd2 3561 syms[i] = syms[chosen[i]];
14f9c5c9
AS
3562
3563 return n_chosen;
3564}
3565
3566/* Read and validate a set of numeric choices from the user in the
4c4b4cd2 3567 range 0 .. N_CHOICES-1. Place the results in increasing
14f9c5c9
AS
3568 order in CHOICES[0 .. N-1], and return N.
3569
3570 The user types choices as a sequence of numbers on one line
3571 separated by blanks, encoding them as follows:
3572
4c4b4cd2 3573 + A choice of 0 means to cancel the selection, throwing an error.
14f9c5c9
AS
3574 + If IS_ALL_CHOICE, a choice of 1 selects the entire set 0 .. N_CHOICES-1.
3575 + The user chooses k by typing k+IS_ALL_CHOICE+1.
3576
4c4b4cd2 3577 The user is not allowed to choose more than MAX_RESULTS values.
14f9c5c9
AS
3578
3579 ANNOTATION_SUFFIX, if present, is used to annotate the input
4c4b4cd2 3580 prompts (for use with the -f switch). */
14f9c5c9
AS
3581
3582int
d2e4a39e 3583get_selections (int *choices, int n_choices, int max_results,
4c4b4cd2 3584 int is_all_choice, char *annotation_suffix)
14f9c5c9 3585{
d2e4a39e 3586 char *args;
0bcd0149 3587 char *prompt;
14f9c5c9
AS
3588 int n_chosen;
3589 int first_choice = is_all_choice ? 2 : 1;
d2e4a39e 3590
14f9c5c9
AS
3591 prompt = getenv ("PS2");
3592 if (prompt == NULL)
0bcd0149 3593 prompt = "> ";
14f9c5c9 3594
0bcd0149 3595 args = command_line_input (prompt, 0, annotation_suffix);
d2e4a39e 3596
14f9c5c9 3597 if (args == NULL)
323e0a4a 3598 error_no_arg (_("one or more choice numbers"));
14f9c5c9
AS
3599
3600 n_chosen = 0;
76a01679 3601
4c4b4cd2
PH
3602 /* Set choices[0 .. n_chosen-1] to the users' choices in ascending
3603 order, as given in args. Choices are validated. */
14f9c5c9
AS
3604 while (1)
3605 {
d2e4a39e 3606 char *args2;
14f9c5c9
AS
3607 int choice, j;
3608
3609 while (isspace (*args))
4c4b4cd2 3610 args += 1;
14f9c5c9 3611 if (*args == '\0' && n_chosen == 0)
323e0a4a 3612 error_no_arg (_("one or more choice numbers"));
14f9c5c9 3613 else if (*args == '\0')
4c4b4cd2 3614 break;
14f9c5c9
AS
3615
3616 choice = strtol (args, &args2, 10);
d2e4a39e 3617 if (args == args2 || choice < 0
4c4b4cd2 3618 || choice > n_choices + first_choice - 1)
323e0a4a 3619 error (_("Argument must be choice number"));
14f9c5c9
AS
3620 args = args2;
3621
d2e4a39e 3622 if (choice == 0)
323e0a4a 3623 error (_("cancelled"));
14f9c5c9
AS
3624
3625 if (choice < first_choice)
4c4b4cd2
PH
3626 {
3627 n_chosen = n_choices;
3628 for (j = 0; j < n_choices; j += 1)
3629 choices[j] = j;
3630 break;
3631 }
14f9c5c9
AS
3632 choice -= first_choice;
3633
d2e4a39e 3634 for (j = n_chosen - 1; j >= 0 && choice < choices[j]; j -= 1)
4c4b4cd2
PH
3635 {
3636 }
14f9c5c9
AS
3637
3638 if (j < 0 || choice != choices[j])
4c4b4cd2
PH
3639 {
3640 int k;
5b4ee69b 3641
4c4b4cd2
PH
3642 for (k = n_chosen - 1; k > j; k -= 1)
3643 choices[k + 1] = choices[k];
3644 choices[j + 1] = choice;
3645 n_chosen += 1;
3646 }
14f9c5c9
AS
3647 }
3648
3649 if (n_chosen > max_results)
323e0a4a 3650 error (_("Select no more than %d of the above"), max_results);
d2e4a39e 3651
14f9c5c9
AS
3652 return n_chosen;
3653}
3654
4c4b4cd2
PH
3655/* Replace the operator of length OPLEN at position PC in *EXPP with a call
3656 on the function identified by SYM and BLOCK, and taking NARGS
3657 arguments. Update *EXPP as needed to hold more space. */
14f9c5c9
AS
3658
3659static void
d2e4a39e 3660replace_operator_with_call (struct expression **expp, int pc, int nargs,
4c4b4cd2
PH
3661 int oplen, struct symbol *sym,
3662 struct block *block)
14f9c5c9
AS
3663{
3664 /* A new expression, with 6 more elements (3 for funcall, 4 for function
4c4b4cd2 3665 symbol, -oplen for operator being replaced). */
d2e4a39e 3666 struct expression *newexp = (struct expression *)
8c1a34e7 3667 xzalloc (sizeof (struct expression)
4c4b4cd2 3668 + EXP_ELEM_TO_BYTES ((*expp)->nelts + 7 - oplen));
d2e4a39e 3669 struct expression *exp = *expp;
14f9c5c9
AS
3670
3671 newexp->nelts = exp->nelts + 7 - oplen;
3672 newexp->language_defn = exp->language_defn;
3489610d 3673 newexp->gdbarch = exp->gdbarch;
14f9c5c9 3674 memcpy (newexp->elts, exp->elts, EXP_ELEM_TO_BYTES (pc));
d2e4a39e 3675 memcpy (newexp->elts + pc + 7, exp->elts + pc + oplen,
4c4b4cd2 3676 EXP_ELEM_TO_BYTES (exp->nelts - pc - oplen));
14f9c5c9
AS
3677
3678 newexp->elts[pc].opcode = newexp->elts[pc + 2].opcode = OP_FUNCALL;
3679 newexp->elts[pc + 1].longconst = (LONGEST) nargs;
3680
3681 newexp->elts[pc + 3].opcode = newexp->elts[pc + 6].opcode = OP_VAR_VALUE;
3682 newexp->elts[pc + 4].block = block;
3683 newexp->elts[pc + 5].symbol = sym;
3684
3685 *expp = newexp;
aacb1f0a 3686 xfree (exp);
d2e4a39e 3687}
14f9c5c9
AS
3688
3689/* Type-class predicates */
3690
4c4b4cd2
PH
3691/* True iff TYPE is numeric (i.e., an INT, RANGE (of numeric type),
3692 or FLOAT). */
14f9c5c9
AS
3693
3694static int
d2e4a39e 3695numeric_type_p (struct type *type)
14f9c5c9
AS
3696{
3697 if (type == NULL)
3698 return 0;
d2e4a39e
AS
3699 else
3700 {
3701 switch (TYPE_CODE (type))
4c4b4cd2
PH
3702 {
3703 case TYPE_CODE_INT:
3704 case TYPE_CODE_FLT:
3705 return 1;
3706 case TYPE_CODE_RANGE:
3707 return (type == TYPE_TARGET_TYPE (type)
3708 || numeric_type_p (TYPE_TARGET_TYPE (type)));
3709 default:
3710 return 0;
3711 }
d2e4a39e 3712 }
14f9c5c9
AS
3713}
3714
4c4b4cd2 3715/* True iff TYPE is integral (an INT or RANGE of INTs). */
14f9c5c9
AS
3716
3717static int
d2e4a39e 3718integer_type_p (struct type *type)
14f9c5c9
AS
3719{
3720 if (type == NULL)
3721 return 0;
d2e4a39e
AS
3722 else
3723 {
3724 switch (TYPE_CODE (type))
4c4b4cd2
PH
3725 {
3726 case TYPE_CODE_INT:
3727 return 1;
3728 case TYPE_CODE_RANGE:
3729 return (type == TYPE_TARGET_TYPE (type)
3730 || integer_type_p (TYPE_TARGET_TYPE (type)));
3731 default:
3732 return 0;
3733 }
d2e4a39e 3734 }
14f9c5c9
AS
3735}
3736
4c4b4cd2 3737/* True iff TYPE is scalar (INT, RANGE, FLOAT, ENUM). */
14f9c5c9
AS
3738
3739static int
d2e4a39e 3740scalar_type_p (struct type *type)
14f9c5c9
AS
3741{
3742 if (type == NULL)
3743 return 0;
d2e4a39e
AS
3744 else
3745 {
3746 switch (TYPE_CODE (type))
4c4b4cd2
PH
3747 {
3748 case TYPE_CODE_INT:
3749 case TYPE_CODE_RANGE:
3750 case TYPE_CODE_ENUM:
3751 case TYPE_CODE_FLT:
3752 return 1;
3753 default:
3754 return 0;
3755 }
d2e4a39e 3756 }
14f9c5c9
AS
3757}
3758
4c4b4cd2 3759/* True iff TYPE is discrete (INT, RANGE, ENUM). */
14f9c5c9
AS
3760
3761static int
d2e4a39e 3762discrete_type_p (struct type *type)
14f9c5c9
AS
3763{
3764 if (type == NULL)
3765 return 0;
d2e4a39e
AS
3766 else
3767 {
3768 switch (TYPE_CODE (type))
4c4b4cd2
PH
3769 {
3770 case TYPE_CODE_INT:
3771 case TYPE_CODE_RANGE:
3772 case TYPE_CODE_ENUM:
872f0337 3773 case TYPE_CODE_BOOL:
4c4b4cd2
PH
3774 return 1;
3775 default:
3776 return 0;
3777 }
d2e4a39e 3778 }
14f9c5c9
AS
3779}
3780
4c4b4cd2
PH
3781/* Returns non-zero if OP with operands in the vector ARGS could be
3782 a user-defined function. Errs on the side of pre-defined operators
3783 (i.e., result 0). */
14f9c5c9
AS
3784
3785static int
d2e4a39e 3786possible_user_operator_p (enum exp_opcode op, struct value *args[])
14f9c5c9 3787{
76a01679 3788 struct type *type0 =
df407dfe 3789 (args[0] == NULL) ? NULL : ada_check_typedef (value_type (args[0]));
d2e4a39e 3790 struct type *type1 =
df407dfe 3791 (args[1] == NULL) ? NULL : ada_check_typedef (value_type (args[1]));
d2e4a39e 3792
4c4b4cd2
PH
3793 if (type0 == NULL)
3794 return 0;
3795
14f9c5c9
AS
3796 switch (op)
3797 {
3798 default:
3799 return 0;
3800
3801 case BINOP_ADD:
3802 case BINOP_SUB:
3803 case BINOP_MUL:
3804 case BINOP_DIV:
d2e4a39e 3805 return (!(numeric_type_p (type0) && numeric_type_p (type1)));
14f9c5c9
AS
3806
3807 case BINOP_REM:
3808 case BINOP_MOD:
3809 case BINOP_BITWISE_AND:
3810 case BINOP_BITWISE_IOR:
3811 case BINOP_BITWISE_XOR:
d2e4a39e 3812 return (!(integer_type_p (type0) && integer_type_p (type1)));
14f9c5c9
AS
3813
3814 case BINOP_EQUAL:
3815 case BINOP_NOTEQUAL:
3816 case BINOP_LESS:
3817 case BINOP_GTR:
3818 case BINOP_LEQ:
3819 case BINOP_GEQ:
d2e4a39e 3820 return (!(scalar_type_p (type0) && scalar_type_p (type1)));
14f9c5c9
AS
3821
3822 case BINOP_CONCAT:
ee90b9ab 3823 return !ada_is_array_type (type0) || !ada_is_array_type (type1);
14f9c5c9
AS
3824
3825 case BINOP_EXP:
d2e4a39e 3826 return (!(numeric_type_p (type0) && integer_type_p (type1)));
14f9c5c9
AS
3827
3828 case UNOP_NEG:
3829 case UNOP_PLUS:
3830 case UNOP_LOGICAL_NOT:
d2e4a39e
AS
3831 case UNOP_ABS:
3832 return (!numeric_type_p (type0));
14f9c5c9
AS
3833
3834 }
3835}
3836\f
4c4b4cd2 3837 /* Renaming */
14f9c5c9 3838
aeb5907d
JB
3839/* NOTES:
3840
3841 1. In the following, we assume that a renaming type's name may
3842 have an ___XD suffix. It would be nice if this went away at some
3843 point.
3844 2. We handle both the (old) purely type-based representation of
3845 renamings and the (new) variable-based encoding. At some point,
3846 it is devoutly to be hoped that the former goes away
3847 (FIXME: hilfinger-2007-07-09).
3848 3. Subprogram renamings are not implemented, although the XRS
3849 suffix is recognized (FIXME: hilfinger-2007-07-09). */
3850
3851/* If SYM encodes a renaming,
3852
3853 <renaming> renames <renamed entity>,
3854
3855 sets *LEN to the length of the renamed entity's name,
3856 *RENAMED_ENTITY to that name (not null-terminated), and *RENAMING_EXPR to
3857 the string describing the subcomponent selected from the renamed
0963b4bd 3858 entity. Returns ADA_NOT_RENAMING if SYM does not encode a renaming
aeb5907d
JB
3859 (in which case, the values of *RENAMED_ENTITY, *LEN, and *RENAMING_EXPR
3860 are undefined). Otherwise, returns a value indicating the category
3861 of entity renamed: an object (ADA_OBJECT_RENAMING), exception
3862 (ADA_EXCEPTION_RENAMING), package (ADA_PACKAGE_RENAMING), or
3863 subprogram (ADA_SUBPROGRAM_RENAMING). Does no allocation; the
3864 strings returned in *RENAMED_ENTITY and *RENAMING_EXPR should not be
3865 deallocated. The values of RENAMED_ENTITY, LEN, or RENAMING_EXPR
3866 may be NULL, in which case they are not assigned.
3867
3868 [Currently, however, GCC does not generate subprogram renamings.] */
3869
3870enum ada_renaming_category
3871ada_parse_renaming (struct symbol *sym,
3872 const char **renamed_entity, int *len,
3873 const char **renaming_expr)
3874{
3875 enum ada_renaming_category kind;
3876 const char *info;
3877 const char *suffix;
3878
3879 if (sym == NULL)
3880 return ADA_NOT_RENAMING;
3881 switch (SYMBOL_CLASS (sym))
14f9c5c9 3882 {
aeb5907d
JB
3883 default:
3884 return ADA_NOT_RENAMING;
3885 case LOC_TYPEDEF:
3886 return parse_old_style_renaming (SYMBOL_TYPE (sym),
3887 renamed_entity, len, renaming_expr);
3888 case LOC_LOCAL:
3889 case LOC_STATIC:
3890 case LOC_COMPUTED:
3891 case LOC_OPTIMIZED_OUT:
3892 info = strstr (SYMBOL_LINKAGE_NAME (sym), "___XR");
3893 if (info == NULL)
3894 return ADA_NOT_RENAMING;
3895 switch (info[5])
3896 {
3897 case '_':
3898 kind = ADA_OBJECT_RENAMING;
3899 info += 6;
3900 break;
3901 case 'E':
3902 kind = ADA_EXCEPTION_RENAMING;
3903 info += 7;
3904 break;
3905 case 'P':
3906 kind = ADA_PACKAGE_RENAMING;
3907 info += 7;
3908 break;
3909 case 'S':
3910 kind = ADA_SUBPROGRAM_RENAMING;
3911 info += 7;
3912 break;
3913 default:
3914 return ADA_NOT_RENAMING;
3915 }
14f9c5c9 3916 }
4c4b4cd2 3917
aeb5907d
JB
3918 if (renamed_entity != NULL)
3919 *renamed_entity = info;
3920 suffix = strstr (info, "___XE");
3921 if (suffix == NULL || suffix == info)
3922 return ADA_NOT_RENAMING;
3923 if (len != NULL)
3924 *len = strlen (info) - strlen (suffix);
3925 suffix += 5;
3926 if (renaming_expr != NULL)
3927 *renaming_expr = suffix;
3928 return kind;
3929}
3930
3931/* Assuming TYPE encodes a renaming according to the old encoding in
3932 exp_dbug.ads, returns details of that renaming in *RENAMED_ENTITY,
3933 *LEN, and *RENAMING_EXPR, as for ada_parse_renaming, above. Returns
3934 ADA_NOT_RENAMING otherwise. */
3935static enum ada_renaming_category
3936parse_old_style_renaming (struct type *type,
3937 const char **renamed_entity, int *len,
3938 const char **renaming_expr)
3939{
3940 enum ada_renaming_category kind;
3941 const char *name;
3942 const char *info;
3943 const char *suffix;
14f9c5c9 3944
aeb5907d
JB
3945 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_ENUM
3946 || TYPE_NFIELDS (type) != 1)
3947 return ADA_NOT_RENAMING;
14f9c5c9 3948
aeb5907d
JB
3949 name = type_name_no_tag (type);
3950 if (name == NULL)
3951 return ADA_NOT_RENAMING;
3952
3953 name = strstr (name, "___XR");
3954 if (name == NULL)
3955 return ADA_NOT_RENAMING;
3956 switch (name[5])
3957 {
3958 case '\0':
3959 case '_':
3960 kind = ADA_OBJECT_RENAMING;
3961 break;
3962 case 'E':
3963 kind = ADA_EXCEPTION_RENAMING;
3964 break;
3965 case 'P':
3966 kind = ADA_PACKAGE_RENAMING;
3967 break;
3968 case 'S':
3969 kind = ADA_SUBPROGRAM_RENAMING;
3970 break;
3971 default:
3972 return ADA_NOT_RENAMING;
3973 }
14f9c5c9 3974
aeb5907d
JB
3975 info = TYPE_FIELD_NAME (type, 0);
3976 if (info == NULL)
3977 return ADA_NOT_RENAMING;
3978 if (renamed_entity != NULL)
3979 *renamed_entity = info;
3980 suffix = strstr (info, "___XE");
3981 if (renaming_expr != NULL)
3982 *renaming_expr = suffix + 5;
3983 if (suffix == NULL || suffix == info)
3984 return ADA_NOT_RENAMING;
3985 if (len != NULL)
3986 *len = suffix - info;
3987 return kind;
3988}
52ce6436 3989
14f9c5c9 3990\f
d2e4a39e 3991
4c4b4cd2 3992 /* Evaluation: Function Calls */
14f9c5c9 3993
4c4b4cd2 3994/* Return an lvalue containing the value VAL. This is the identity on
40bc484c
JB
3995 lvalues, and otherwise has the side-effect of allocating memory
3996 in the inferior where a copy of the value contents is copied. */
14f9c5c9 3997
d2e4a39e 3998static struct value *
40bc484c 3999ensure_lval (struct value *val)
14f9c5c9 4000{
40bc484c
JB
4001 if (VALUE_LVAL (val) == not_lval
4002 || VALUE_LVAL (val) == lval_internalvar)
c3e5cd34 4003 {
df407dfe 4004 int len = TYPE_LENGTH (ada_check_typedef (value_type (val)));
40bc484c
JB
4005 const CORE_ADDR addr =
4006 value_as_long (value_allocate_space_in_inferior (len));
c3e5cd34 4007
40bc484c 4008 set_value_address (val, addr);
a84a8a0d 4009 VALUE_LVAL (val) = lval_memory;
40bc484c 4010 write_memory (addr, value_contents (val), len);
c3e5cd34 4011 }
14f9c5c9
AS
4012
4013 return val;
4014}
4015
4016/* Return the value ACTUAL, converted to be an appropriate value for a
4017 formal of type FORMAL_TYPE. Use *SP as a stack pointer for
4018 allocating any necessary descriptors (fat pointers), or copies of
4c4b4cd2 4019 values not residing in memory, updating it as needed. */
14f9c5c9 4020
a93c0eb6 4021struct value *
40bc484c 4022ada_convert_actual (struct value *actual, struct type *formal_type0)
14f9c5c9 4023{
df407dfe 4024 struct type *actual_type = ada_check_typedef (value_type (actual));
61ee279c 4025 struct type *formal_type = ada_check_typedef (formal_type0);
d2e4a39e
AS
4026 struct type *formal_target =
4027 TYPE_CODE (formal_type) == TYPE_CODE_PTR
61ee279c 4028 ? ada_check_typedef (TYPE_TARGET_TYPE (formal_type)) : formal_type;
d2e4a39e
AS
4029 struct type *actual_target =
4030 TYPE_CODE (actual_type) == TYPE_CODE_PTR
61ee279c 4031 ? ada_check_typedef (TYPE_TARGET_TYPE (actual_type)) : actual_type;
14f9c5c9 4032
4c4b4cd2 4033 if (ada_is_array_descriptor_type (formal_target)
14f9c5c9 4034 && TYPE_CODE (actual_target) == TYPE_CODE_ARRAY)
40bc484c 4035 return make_array_descriptor (formal_type, actual);
a84a8a0d
JB
4036 else if (TYPE_CODE (formal_type) == TYPE_CODE_PTR
4037 || TYPE_CODE (formal_type) == TYPE_CODE_REF)
14f9c5c9 4038 {
a84a8a0d 4039 struct value *result;
5b4ee69b 4040
14f9c5c9 4041 if (TYPE_CODE (formal_target) == TYPE_CODE_ARRAY
4c4b4cd2 4042 && ada_is_array_descriptor_type (actual_target))
a84a8a0d 4043 result = desc_data (actual);
14f9c5c9 4044 else if (TYPE_CODE (actual_type) != TYPE_CODE_PTR)
4c4b4cd2
PH
4045 {
4046 if (VALUE_LVAL (actual) != lval_memory)
4047 {
4048 struct value *val;
5b4ee69b 4049
df407dfe 4050 actual_type = ada_check_typedef (value_type (actual));
4c4b4cd2 4051 val = allocate_value (actual_type);
990a07ab 4052 memcpy ((char *) value_contents_raw (val),
0fd88904 4053 (char *) value_contents (actual),
4c4b4cd2 4054 TYPE_LENGTH (actual_type));
40bc484c 4055 actual = ensure_lval (val);
4c4b4cd2 4056 }
a84a8a0d 4057 result = value_addr (actual);
4c4b4cd2 4058 }
a84a8a0d
JB
4059 else
4060 return actual;
4061 return value_cast_pointers (formal_type, result);
14f9c5c9
AS
4062 }
4063 else if (TYPE_CODE (actual_type) == TYPE_CODE_PTR)
4064 return ada_value_ind (actual);
4065
4066 return actual;
4067}
4068
438c98a1
JB
4069/* Convert VALUE (which must be an address) to a CORE_ADDR that is a pointer of
4070 type TYPE. This is usually an inefficient no-op except on some targets
4071 (such as AVR) where the representation of a pointer and an address
4072 differs. */
4073
4074static CORE_ADDR
4075value_pointer (struct value *value, struct type *type)
4076{
4077 struct gdbarch *gdbarch = get_type_arch (type);
4078 unsigned len = TYPE_LENGTH (type);
4079 gdb_byte *buf = alloca (len);
4080 CORE_ADDR addr;
4081
4082 addr = value_address (value);
4083 gdbarch_address_to_pointer (gdbarch, type, buf, addr);
4084 addr = extract_unsigned_integer (buf, len, gdbarch_byte_order (gdbarch));
4085 return addr;
4086}
4087
14f9c5c9 4088
4c4b4cd2
PH
4089/* Push a descriptor of type TYPE for array value ARR on the stack at
4090 *SP, updating *SP to reflect the new descriptor. Return either
14f9c5c9 4091 an lvalue representing the new descriptor, or (if TYPE is a pointer-
4c4b4cd2
PH
4092 to-descriptor type rather than a descriptor type), a struct value *
4093 representing a pointer to this descriptor. */
14f9c5c9 4094
d2e4a39e 4095static struct value *
40bc484c 4096make_array_descriptor (struct type *type, struct value *arr)
14f9c5c9 4097{
d2e4a39e
AS
4098 struct type *bounds_type = desc_bounds_type (type);
4099 struct type *desc_type = desc_base_type (type);
4100 struct value *descriptor = allocate_value (desc_type);
4101 struct value *bounds = allocate_value (bounds_type);
14f9c5c9 4102 int i;
d2e4a39e 4103
0963b4bd
MS
4104 for (i = ada_array_arity (ada_check_typedef (value_type (arr)));
4105 i > 0; i -= 1)
14f9c5c9 4106 {
19f220c3
JK
4107 modify_field (value_type (bounds), value_contents_writeable (bounds),
4108 ada_array_bound (arr, i, 0),
4109 desc_bound_bitpos (bounds_type, i, 0),
4110 desc_bound_bitsize (bounds_type, i, 0));
4111 modify_field (value_type (bounds), value_contents_writeable (bounds),
4112 ada_array_bound (arr, i, 1),
4113 desc_bound_bitpos (bounds_type, i, 1),
4114 desc_bound_bitsize (bounds_type, i, 1));
14f9c5c9 4115 }
d2e4a39e 4116
40bc484c 4117 bounds = ensure_lval (bounds);
d2e4a39e 4118
19f220c3
JK
4119 modify_field (value_type (descriptor),
4120 value_contents_writeable (descriptor),
4121 value_pointer (ensure_lval (arr),
4122 TYPE_FIELD_TYPE (desc_type, 0)),
4123 fat_pntr_data_bitpos (desc_type),
4124 fat_pntr_data_bitsize (desc_type));
4125
4126 modify_field (value_type (descriptor),
4127 value_contents_writeable (descriptor),
4128 value_pointer (bounds,
4129 TYPE_FIELD_TYPE (desc_type, 1)),
4130 fat_pntr_bounds_bitpos (desc_type),
4131 fat_pntr_bounds_bitsize (desc_type));
14f9c5c9 4132
40bc484c 4133 descriptor = ensure_lval (descriptor);
14f9c5c9
AS
4134
4135 if (TYPE_CODE (type) == TYPE_CODE_PTR)
4136 return value_addr (descriptor);
4137 else
4138 return descriptor;
4139}
14f9c5c9 4140\f
963a6417 4141/* Dummy definitions for an experimental caching module that is not
0963b4bd 4142 * used in the public sources. */
96d887e8 4143
96d887e8
PH
4144static int
4145lookup_cached_symbol (const char *name, domain_enum namespace,
2570f2b7 4146 struct symbol **sym, struct block **block)
96d887e8
PH
4147{
4148 return 0;
4149}
4150
4151static void
4152cache_symbol (const char *name, domain_enum namespace, struct symbol *sym,
2570f2b7 4153 struct block *block)
96d887e8
PH
4154{
4155}
4c4b4cd2
PH
4156\f
4157 /* Symbol Lookup */
4158
4159/* Return the result of a standard (literal, C-like) lookup of NAME in
4160 given DOMAIN, visible from lexical block BLOCK. */
4161
4162static struct symbol *
4163standard_lookup (const char *name, const struct block *block,
4164 domain_enum domain)
4165{
4166 struct symbol *sym;
4c4b4cd2 4167
2570f2b7 4168 if (lookup_cached_symbol (name, domain, &sym, NULL))
4c4b4cd2 4169 return sym;
2570f2b7
UW
4170 sym = lookup_symbol_in_language (name, block, domain, language_c, 0);
4171 cache_symbol (name, domain, sym, block_found);
4c4b4cd2
PH
4172 return sym;
4173}
4174
4175
4176/* Non-zero iff there is at least one non-function/non-enumeral symbol
4177 in the symbol fields of SYMS[0..N-1]. We treat enumerals as functions,
4178 since they contend in overloading in the same way. */
4179static int
4180is_nonfunction (struct ada_symbol_info syms[], int n)
4181{
4182 int i;
4183
4184 for (i = 0; i < n; i += 1)
4185 if (TYPE_CODE (SYMBOL_TYPE (syms[i].sym)) != TYPE_CODE_FUNC
4186 && (TYPE_CODE (SYMBOL_TYPE (syms[i].sym)) != TYPE_CODE_ENUM
4187 || SYMBOL_CLASS (syms[i].sym) != LOC_CONST))
14f9c5c9
AS
4188 return 1;
4189
4190 return 0;
4191}
4192
4193/* If true (non-zero), then TYPE0 and TYPE1 represent equivalent
4c4b4cd2 4194 struct types. Otherwise, they may not. */
14f9c5c9
AS
4195
4196static int
d2e4a39e 4197equiv_types (struct type *type0, struct type *type1)
14f9c5c9 4198{
d2e4a39e 4199 if (type0 == type1)
14f9c5c9 4200 return 1;
d2e4a39e 4201 if (type0 == NULL || type1 == NULL
14f9c5c9
AS
4202 || TYPE_CODE (type0) != TYPE_CODE (type1))
4203 return 0;
d2e4a39e 4204 if ((TYPE_CODE (type0) == TYPE_CODE_STRUCT
14f9c5c9
AS
4205 || TYPE_CODE (type0) == TYPE_CODE_ENUM)
4206 && ada_type_name (type0) != NULL && ada_type_name (type1) != NULL
4c4b4cd2 4207 && strcmp (ada_type_name (type0), ada_type_name (type1)) == 0)
14f9c5c9 4208 return 1;
d2e4a39e 4209
14f9c5c9
AS
4210 return 0;
4211}
4212
4213/* True iff SYM0 represents the same entity as SYM1, or one that is
4c4b4cd2 4214 no more defined than that of SYM1. */
14f9c5c9
AS
4215
4216static int
d2e4a39e 4217lesseq_defined_than (struct symbol *sym0, struct symbol *sym1)
14f9c5c9
AS
4218{
4219 if (sym0 == sym1)
4220 return 1;
176620f1 4221 if (SYMBOL_DOMAIN (sym0) != SYMBOL_DOMAIN (sym1)
14f9c5c9
AS
4222 || SYMBOL_CLASS (sym0) != SYMBOL_CLASS (sym1))
4223 return 0;
4224
d2e4a39e 4225 switch (SYMBOL_CLASS (sym0))
14f9c5c9
AS
4226 {
4227 case LOC_UNDEF:
4228 return 1;
4229 case LOC_TYPEDEF:
4230 {
4c4b4cd2
PH
4231 struct type *type0 = SYMBOL_TYPE (sym0);
4232 struct type *type1 = SYMBOL_TYPE (sym1);
4233 char *name0 = SYMBOL_LINKAGE_NAME (sym0);
4234 char *name1 = SYMBOL_LINKAGE_NAME (sym1);
4235 int len0 = strlen (name0);
5b4ee69b 4236
4c4b4cd2
PH
4237 return
4238 TYPE_CODE (type0) == TYPE_CODE (type1)
4239 && (equiv_types (type0, type1)
4240 || (len0 < strlen (name1) && strncmp (name0, name1, len0) == 0
4241 && strncmp (name1 + len0, "___XV", 5) == 0));
14f9c5c9
AS
4242 }
4243 case LOC_CONST:
4244 return SYMBOL_VALUE (sym0) == SYMBOL_VALUE (sym1)
4c4b4cd2 4245 && equiv_types (SYMBOL_TYPE (sym0), SYMBOL_TYPE (sym1));
d2e4a39e
AS
4246 default:
4247 return 0;
14f9c5c9
AS
4248 }
4249}
4250
4c4b4cd2
PH
4251/* Append (SYM,BLOCK,SYMTAB) to the end of the array of struct ada_symbol_info
4252 records in OBSTACKP. Do nothing if SYM is a duplicate. */
14f9c5c9
AS
4253
4254static void
76a01679
JB
4255add_defn_to_vec (struct obstack *obstackp,
4256 struct symbol *sym,
2570f2b7 4257 struct block *block)
14f9c5c9
AS
4258{
4259 int i;
4c4b4cd2 4260 struct ada_symbol_info *prevDefns = defns_collected (obstackp, 0);
14f9c5c9 4261
529cad9c
PH
4262 /* Do not try to complete stub types, as the debugger is probably
4263 already scanning all symbols matching a certain name at the
4264 time when this function is called. Trying to replace the stub
4265 type by its associated full type will cause us to restart a scan
4266 which may lead to an infinite recursion. Instead, the client
4267 collecting the matching symbols will end up collecting several
4268 matches, with at least one of them complete. It can then filter
4269 out the stub ones if needed. */
4270
4c4b4cd2
PH
4271 for (i = num_defns_collected (obstackp) - 1; i >= 0; i -= 1)
4272 {
4273 if (lesseq_defined_than (sym, prevDefns[i].sym))
4274 return;
4275 else if (lesseq_defined_than (prevDefns[i].sym, sym))
4276 {
4277 prevDefns[i].sym = sym;
4278 prevDefns[i].block = block;
4c4b4cd2 4279 return;
76a01679 4280 }
4c4b4cd2
PH
4281 }
4282
4283 {
4284 struct ada_symbol_info info;
4285
4286 info.sym = sym;
4287 info.block = block;
4c4b4cd2
PH
4288 obstack_grow (obstackp, &info, sizeof (struct ada_symbol_info));
4289 }
4290}
4291
4292/* Number of ada_symbol_info structures currently collected in
4293 current vector in *OBSTACKP. */
4294
76a01679
JB
4295static int
4296num_defns_collected (struct obstack *obstackp)
4c4b4cd2
PH
4297{
4298 return obstack_object_size (obstackp) / sizeof (struct ada_symbol_info);
4299}
4300
4301/* Vector of ada_symbol_info structures currently collected in current
4302 vector in *OBSTACKP. If FINISH, close off the vector and return
4303 its final address. */
4304
76a01679 4305static struct ada_symbol_info *
4c4b4cd2
PH
4306defns_collected (struct obstack *obstackp, int finish)
4307{
4308 if (finish)
4309 return obstack_finish (obstackp);
4310 else
4311 return (struct ada_symbol_info *) obstack_base (obstackp);
4312}
4313
96d887e8
PH
4314/* Return a minimal symbol matching NAME according to Ada decoding
4315 rules. Returns NULL if there is no such minimal symbol. Names
4316 prefixed with "standard__" are handled specially: "standard__" is
4317 first stripped off, and only static and global symbols are searched. */
4c4b4cd2 4318
96d887e8
PH
4319struct minimal_symbol *
4320ada_lookup_simple_minsym (const char *name)
4c4b4cd2 4321{
4c4b4cd2 4322 struct objfile *objfile;
96d887e8
PH
4323 struct minimal_symbol *msymbol;
4324 int wild_match;
4c4b4cd2 4325
96d887e8 4326 if (strncmp (name, "standard__", sizeof ("standard__") - 1) == 0)
4c4b4cd2 4327 {
96d887e8 4328 name += sizeof ("standard__") - 1;
4c4b4cd2 4329 wild_match = 0;
4c4b4cd2
PH
4330 }
4331 else
96d887e8 4332 wild_match = (strstr (name, "__") == NULL);
4c4b4cd2 4333
96d887e8
PH
4334 ALL_MSYMBOLS (objfile, msymbol)
4335 {
40658b94 4336 if (match_name (SYMBOL_LINKAGE_NAME (msymbol), name, wild_match)
96d887e8
PH
4337 && MSYMBOL_TYPE (msymbol) != mst_solib_trampoline)
4338 return msymbol;
4339 }
4c4b4cd2 4340
96d887e8
PH
4341 return NULL;
4342}
4c4b4cd2 4343
96d887e8
PH
4344/* For all subprograms that statically enclose the subprogram of the
4345 selected frame, add symbols matching identifier NAME in DOMAIN
4346 and their blocks to the list of data in OBSTACKP, as for
4347 ada_add_block_symbols (q.v.). If WILD, treat as NAME with a
4348 wildcard prefix. */
4c4b4cd2 4349
96d887e8
PH
4350static void
4351add_symbols_from_enclosing_procs (struct obstack *obstackp,
76a01679 4352 const char *name, domain_enum namespace,
96d887e8
PH
4353 int wild_match)
4354{
96d887e8 4355}
14f9c5c9 4356
96d887e8
PH
4357/* True if TYPE is definitely an artificial type supplied to a symbol
4358 for which no debugging information was given in the symbol file. */
14f9c5c9 4359
96d887e8
PH
4360static int
4361is_nondebugging_type (struct type *type)
4362{
4363 char *name = ada_type_name (type);
5b4ee69b 4364
96d887e8
PH
4365 return (name != NULL && strcmp (name, "<variable, no debug info>") == 0);
4366}
4c4b4cd2 4367
8f17729f
JB
4368/* Return nonzero if TYPE1 and TYPE2 are two enumeration types
4369 that are deemed "identical" for practical purposes.
4370
4371 This function assumes that TYPE1 and TYPE2 are both TYPE_CODE_ENUM
4372 types and that their number of enumerals is identical (in other
4373 words, TYPE_NFIELDS (type1) == TYPE_NFIELDS (type2)). */
4374
4375static int
4376ada_identical_enum_types_p (struct type *type1, struct type *type2)
4377{
4378 int i;
4379
4380 /* The heuristic we use here is fairly conservative. We consider
4381 that 2 enumerate types are identical if they have the same
4382 number of enumerals and that all enumerals have the same
4383 underlying value and name. */
4384
4385 /* All enums in the type should have an identical underlying value. */
4386 for (i = 0; i < TYPE_NFIELDS (type1); i++)
4387 if (TYPE_FIELD_BITPOS (type1, i) != TYPE_FIELD_BITPOS (type2, i))
4388 return 0;
4389
4390 /* All enumerals should also have the same name (modulo any numerical
4391 suffix). */
4392 for (i = 0; i < TYPE_NFIELDS (type1); i++)
4393 {
4394 char *name_1 = TYPE_FIELD_NAME (type1, i);
4395 char *name_2 = TYPE_FIELD_NAME (type2, i);
4396 int len_1 = strlen (name_1);
4397 int len_2 = strlen (name_2);
4398
4399 ada_remove_trailing_digits (TYPE_FIELD_NAME (type1, i), &len_1);
4400 ada_remove_trailing_digits (TYPE_FIELD_NAME (type2, i), &len_2);
4401 if (len_1 != len_2
4402 || strncmp (TYPE_FIELD_NAME (type1, i),
4403 TYPE_FIELD_NAME (type2, i),
4404 len_1) != 0)
4405 return 0;
4406 }
4407
4408 return 1;
4409}
4410
4411/* Return nonzero if all the symbols in SYMS are all enumeral symbols
4412 that are deemed "identical" for practical purposes. Sometimes,
4413 enumerals are not strictly identical, but their types are so similar
4414 that they can be considered identical.
4415
4416 For instance, consider the following code:
4417
4418 type Color is (Black, Red, Green, Blue, White);
4419 type RGB_Color is new Color range Red .. Blue;
4420
4421 Type RGB_Color is a subrange of an implicit type which is a copy
4422 of type Color. If we call that implicit type RGB_ColorB ("B" is
4423 for "Base Type"), then type RGB_ColorB is a copy of type Color.
4424 As a result, when an expression references any of the enumeral
4425 by name (Eg. "print green"), the expression is technically
4426 ambiguous and the user should be asked to disambiguate. But
4427 doing so would only hinder the user, since it wouldn't matter
4428 what choice he makes, the outcome would always be the same.
4429 So, for practical purposes, we consider them as the same. */
4430
4431static int
4432symbols_are_identical_enums (struct ada_symbol_info *syms, int nsyms)
4433{
4434 int i;
4435
4436 /* Before performing a thorough comparison check of each type,
4437 we perform a series of inexpensive checks. We expect that these
4438 checks will quickly fail in the vast majority of cases, and thus
4439 help prevent the unnecessary use of a more expensive comparison.
4440 Said comparison also expects us to make some of these checks
4441 (see ada_identical_enum_types_p). */
4442
4443 /* Quick check: All symbols should have an enum type. */
4444 for (i = 0; i < nsyms; i++)
4445 if (TYPE_CODE (SYMBOL_TYPE (syms[i].sym)) != TYPE_CODE_ENUM)
4446 return 0;
4447
4448 /* Quick check: They should all have the same value. */
4449 for (i = 1; i < nsyms; i++)
4450 if (SYMBOL_VALUE (syms[i].sym) != SYMBOL_VALUE (syms[0].sym))
4451 return 0;
4452
4453 /* Quick check: They should all have the same number of enumerals. */
4454 for (i = 1; i < nsyms; i++)
4455 if (TYPE_NFIELDS (SYMBOL_TYPE (syms[i].sym))
4456 != TYPE_NFIELDS (SYMBOL_TYPE (syms[0].sym)))
4457 return 0;
4458
4459 /* All the sanity checks passed, so we might have a set of
4460 identical enumeration types. Perform a more complete
4461 comparison of the type of each symbol. */
4462 for (i = 1; i < nsyms; i++)
4463 if (!ada_identical_enum_types_p (SYMBOL_TYPE (syms[i].sym),
4464 SYMBOL_TYPE (syms[0].sym)))
4465 return 0;
4466
4467 return 1;
4468}
4469
96d887e8
PH
4470/* Remove any non-debugging symbols in SYMS[0 .. NSYMS-1] that definitely
4471 duplicate other symbols in the list (The only case I know of where
4472 this happens is when object files containing stabs-in-ecoff are
4473 linked with files containing ordinary ecoff debugging symbols (or no
4474 debugging symbols)). Modifies SYMS to squeeze out deleted entries.
4475 Returns the number of items in the modified list. */
4c4b4cd2 4476
96d887e8
PH
4477static int
4478remove_extra_symbols (struct ada_symbol_info *syms, int nsyms)
4479{
4480 int i, j;
4c4b4cd2 4481
8f17729f
JB
4482 /* We should never be called with less than 2 symbols, as there
4483 cannot be any extra symbol in that case. But it's easy to
4484 handle, since we have nothing to do in that case. */
4485 if (nsyms < 2)
4486 return nsyms;
4487
96d887e8
PH
4488 i = 0;
4489 while (i < nsyms)
4490 {
339c13b6
JB
4491 int remove = 0;
4492
4493 /* If two symbols have the same name and one of them is a stub type,
4494 the get rid of the stub. */
4495
4496 if (TYPE_STUB (SYMBOL_TYPE (syms[i].sym))
4497 && SYMBOL_LINKAGE_NAME (syms[i].sym) != NULL)
4498 {
4499 for (j = 0; j < nsyms; j++)
4500 {
4501 if (j != i
4502 && !TYPE_STUB (SYMBOL_TYPE (syms[j].sym))
4503 && SYMBOL_LINKAGE_NAME (syms[j].sym) != NULL
4504 && strcmp (SYMBOL_LINKAGE_NAME (syms[i].sym),
4505 SYMBOL_LINKAGE_NAME (syms[j].sym)) == 0)
4506 remove = 1;
4507 }
4508 }
4509
4510 /* Two symbols with the same name, same class and same address
4511 should be identical. */
4512
4513 else if (SYMBOL_LINKAGE_NAME (syms[i].sym) != NULL
96d887e8
PH
4514 && SYMBOL_CLASS (syms[i].sym) == LOC_STATIC
4515 && is_nondebugging_type (SYMBOL_TYPE (syms[i].sym)))
4516 {
4517 for (j = 0; j < nsyms; j += 1)
4518 {
4519 if (i != j
4520 && SYMBOL_LINKAGE_NAME (syms[j].sym) != NULL
4521 && strcmp (SYMBOL_LINKAGE_NAME (syms[i].sym),
76a01679 4522 SYMBOL_LINKAGE_NAME (syms[j].sym)) == 0
96d887e8
PH
4523 && SYMBOL_CLASS (syms[i].sym) == SYMBOL_CLASS (syms[j].sym)
4524 && SYMBOL_VALUE_ADDRESS (syms[i].sym)
4525 == SYMBOL_VALUE_ADDRESS (syms[j].sym))
339c13b6 4526 remove = 1;
4c4b4cd2 4527 }
4c4b4cd2 4528 }
339c13b6
JB
4529
4530 if (remove)
4531 {
4532 for (j = i + 1; j < nsyms; j += 1)
4533 syms[j - 1] = syms[j];
4534 nsyms -= 1;
4535 }
4536
96d887e8 4537 i += 1;
14f9c5c9 4538 }
8f17729f
JB
4539
4540 /* If all the remaining symbols are identical enumerals, then
4541 just keep the first one and discard the rest.
4542
4543 Unlike what we did previously, we do not discard any entry
4544 unless they are ALL identical. This is because the symbol
4545 comparison is not a strict comparison, but rather a practical
4546 comparison. If all symbols are considered identical, then
4547 we can just go ahead and use the first one and discard the rest.
4548 But if we cannot reduce the list to a single element, we have
4549 to ask the user to disambiguate anyways. And if we have to
4550 present a multiple-choice menu, it's less confusing if the list
4551 isn't missing some choices that were identical and yet distinct. */
4552 if (symbols_are_identical_enums (syms, nsyms))
4553 nsyms = 1;
4554
96d887e8 4555 return nsyms;
14f9c5c9
AS
4556}
4557
96d887e8
PH
4558/* Given a type that corresponds to a renaming entity, use the type name
4559 to extract the scope (package name or function name, fully qualified,
4560 and following the GNAT encoding convention) where this renaming has been
4561 defined. The string returned needs to be deallocated after use. */
4c4b4cd2 4562
96d887e8
PH
4563static char *
4564xget_renaming_scope (struct type *renaming_type)
14f9c5c9 4565{
96d887e8 4566 /* The renaming types adhere to the following convention:
0963b4bd 4567 <scope>__<rename>___<XR extension>.
96d887e8
PH
4568 So, to extract the scope, we search for the "___XR" extension,
4569 and then backtrack until we find the first "__". */
76a01679 4570
96d887e8
PH
4571 const char *name = type_name_no_tag (renaming_type);
4572 char *suffix = strstr (name, "___XR");
4573 char *last;
4574 int scope_len;
4575 char *scope;
14f9c5c9 4576
96d887e8
PH
4577 /* Now, backtrack a bit until we find the first "__". Start looking
4578 at suffix - 3, as the <rename> part is at least one character long. */
14f9c5c9 4579
96d887e8
PH
4580 for (last = suffix - 3; last > name; last--)
4581 if (last[0] == '_' && last[1] == '_')
4582 break;
76a01679 4583
96d887e8 4584 /* Make a copy of scope and return it. */
14f9c5c9 4585
96d887e8
PH
4586 scope_len = last - name;
4587 scope = (char *) xmalloc ((scope_len + 1) * sizeof (char));
14f9c5c9 4588
96d887e8
PH
4589 strncpy (scope, name, scope_len);
4590 scope[scope_len] = '\0';
4c4b4cd2 4591
96d887e8 4592 return scope;
4c4b4cd2
PH
4593}
4594
96d887e8 4595/* Return nonzero if NAME corresponds to a package name. */
4c4b4cd2 4596
96d887e8
PH
4597static int
4598is_package_name (const char *name)
4c4b4cd2 4599{
96d887e8
PH
4600 /* Here, We take advantage of the fact that no symbols are generated
4601 for packages, while symbols are generated for each function.
4602 So the condition for NAME represent a package becomes equivalent
4603 to NAME not existing in our list of symbols. There is only one
4604 small complication with library-level functions (see below). */
4c4b4cd2 4605
96d887e8 4606 char *fun_name;
76a01679 4607
96d887e8
PH
4608 /* If it is a function that has not been defined at library level,
4609 then we should be able to look it up in the symbols. */
4610 if (standard_lookup (name, NULL, VAR_DOMAIN) != NULL)
4611 return 0;
14f9c5c9 4612
96d887e8
PH
4613 /* Library-level function names start with "_ada_". See if function
4614 "_ada_" followed by NAME can be found. */
14f9c5c9 4615
96d887e8 4616 /* Do a quick check that NAME does not contain "__", since library-level
e1d5a0d2 4617 functions names cannot contain "__" in them. */
96d887e8
PH
4618 if (strstr (name, "__") != NULL)
4619 return 0;
4c4b4cd2 4620
b435e160 4621 fun_name = xstrprintf ("_ada_%s", name);
14f9c5c9 4622
96d887e8
PH
4623 return (standard_lookup (fun_name, NULL, VAR_DOMAIN) == NULL);
4624}
14f9c5c9 4625
96d887e8 4626/* Return nonzero if SYM corresponds to a renaming entity that is
aeb5907d 4627 not visible from FUNCTION_NAME. */
14f9c5c9 4628
96d887e8 4629static int
aeb5907d 4630old_renaming_is_invisible (const struct symbol *sym, char *function_name)
96d887e8 4631{
aeb5907d
JB
4632 char *scope;
4633
4634 if (SYMBOL_CLASS (sym) != LOC_TYPEDEF)
4635 return 0;
4636
4637 scope = xget_renaming_scope (SYMBOL_TYPE (sym));
d2e4a39e 4638
96d887e8 4639 make_cleanup (xfree, scope);
14f9c5c9 4640
96d887e8
PH
4641 /* If the rename has been defined in a package, then it is visible. */
4642 if (is_package_name (scope))
aeb5907d 4643 return 0;
14f9c5c9 4644
96d887e8
PH
4645 /* Check that the rename is in the current function scope by checking
4646 that its name starts with SCOPE. */
76a01679 4647
96d887e8
PH
4648 /* If the function name starts with "_ada_", it means that it is
4649 a library-level function. Strip this prefix before doing the
4650 comparison, as the encoding for the renaming does not contain
4651 this prefix. */
4652 if (strncmp (function_name, "_ada_", 5) == 0)
4653 function_name += 5;
f26caa11 4654
aeb5907d 4655 return (strncmp (function_name, scope, strlen (scope)) != 0);
f26caa11
PH
4656}
4657
aeb5907d
JB
4658/* Remove entries from SYMS that corresponds to a renaming entity that
4659 is not visible from the function associated with CURRENT_BLOCK or
4660 that is superfluous due to the presence of more specific renaming
4661 information. Places surviving symbols in the initial entries of
4662 SYMS and returns the number of surviving symbols.
96d887e8
PH
4663
4664 Rationale:
aeb5907d
JB
4665 First, in cases where an object renaming is implemented as a
4666 reference variable, GNAT may produce both the actual reference
4667 variable and the renaming encoding. In this case, we discard the
4668 latter.
4669
4670 Second, GNAT emits a type following a specified encoding for each renaming
96d887e8
PH
4671 entity. Unfortunately, STABS currently does not support the definition
4672 of types that are local to a given lexical block, so all renamings types
4673 are emitted at library level. As a consequence, if an application
4674 contains two renaming entities using the same name, and a user tries to
4675 print the value of one of these entities, the result of the ada symbol
4676 lookup will also contain the wrong renaming type.
f26caa11 4677
96d887e8
PH
4678 This function partially covers for this limitation by attempting to
4679 remove from the SYMS list renaming symbols that should be visible
4680 from CURRENT_BLOCK. However, there does not seem be a 100% reliable
4681 method with the current information available. The implementation
4682 below has a couple of limitations (FIXME: brobecker-2003-05-12):
4683
4684 - When the user tries to print a rename in a function while there
4685 is another rename entity defined in a package: Normally, the
4686 rename in the function has precedence over the rename in the
4687 package, so the latter should be removed from the list. This is
4688 currently not the case.
4689
4690 - This function will incorrectly remove valid renames if
4691 the CURRENT_BLOCK corresponds to a function which symbol name
4692 has been changed by an "Export" pragma. As a consequence,
4693 the user will be unable to print such rename entities. */
4c4b4cd2 4694
14f9c5c9 4695static int
aeb5907d
JB
4696remove_irrelevant_renamings (struct ada_symbol_info *syms,
4697 int nsyms, const struct block *current_block)
4c4b4cd2
PH
4698{
4699 struct symbol *current_function;
4700 char *current_function_name;
4701 int i;
aeb5907d
JB
4702 int is_new_style_renaming;
4703
4704 /* If there is both a renaming foo___XR... encoded as a variable and
4705 a simple variable foo in the same block, discard the latter.
0963b4bd 4706 First, zero out such symbols, then compress. */
aeb5907d
JB
4707 is_new_style_renaming = 0;
4708 for (i = 0; i < nsyms; i += 1)
4709 {
4710 struct symbol *sym = syms[i].sym;
4711 struct block *block = syms[i].block;
4712 const char *name;
4713 const char *suffix;
4714
4715 if (sym == NULL || SYMBOL_CLASS (sym) == LOC_TYPEDEF)
4716 continue;
4717 name = SYMBOL_LINKAGE_NAME (sym);
4718 suffix = strstr (name, "___XR");
4719
4720 if (suffix != NULL)
4721 {
4722 int name_len = suffix - name;
4723 int j;
5b4ee69b 4724
aeb5907d
JB
4725 is_new_style_renaming = 1;
4726 for (j = 0; j < nsyms; j += 1)
4727 if (i != j && syms[j].sym != NULL
4728 && strncmp (name, SYMBOL_LINKAGE_NAME (syms[j].sym),
4729 name_len) == 0
4730 && block == syms[j].block)
4731 syms[j].sym = NULL;
4732 }
4733 }
4734 if (is_new_style_renaming)
4735 {
4736 int j, k;
4737
4738 for (j = k = 0; j < nsyms; j += 1)
4739 if (syms[j].sym != NULL)
4740 {
4741 syms[k] = syms[j];
4742 k += 1;
4743 }
4744 return k;
4745 }
4c4b4cd2
PH
4746
4747 /* Extract the function name associated to CURRENT_BLOCK.
4748 Abort if unable to do so. */
76a01679 4749
4c4b4cd2
PH
4750 if (current_block == NULL)
4751 return nsyms;
76a01679 4752
7f0df278 4753 current_function = block_linkage_function (current_block);
4c4b4cd2
PH
4754 if (current_function == NULL)
4755 return nsyms;
4756
4757 current_function_name = SYMBOL_LINKAGE_NAME (current_function);
4758 if (current_function_name == NULL)
4759 return nsyms;
4760
4761 /* Check each of the symbols, and remove it from the list if it is
4762 a type corresponding to a renaming that is out of the scope of
4763 the current block. */
4764
4765 i = 0;
4766 while (i < nsyms)
4767 {
aeb5907d
JB
4768 if (ada_parse_renaming (syms[i].sym, NULL, NULL, NULL)
4769 == ADA_OBJECT_RENAMING
4770 && old_renaming_is_invisible (syms[i].sym, current_function_name))
4c4b4cd2
PH
4771 {
4772 int j;
5b4ee69b 4773
aeb5907d 4774 for (j = i + 1; j < nsyms; j += 1)
76a01679 4775 syms[j - 1] = syms[j];
4c4b4cd2
PH
4776 nsyms -= 1;
4777 }
4778 else
4779 i += 1;
4780 }
4781
4782 return nsyms;
4783}
4784
339c13b6
JB
4785/* Add to OBSTACKP all symbols from BLOCK (and its super-blocks)
4786 whose name and domain match NAME and DOMAIN respectively.
4787 If no match was found, then extend the search to "enclosing"
4788 routines (in other words, if we're inside a nested function,
4789 search the symbols defined inside the enclosing functions).
4790
4791 Note: This function assumes that OBSTACKP has 0 (zero) element in it. */
4792
4793static void
4794ada_add_local_symbols (struct obstack *obstackp, const char *name,
4795 struct block *block, domain_enum domain,
4796 int wild_match)
4797{
4798 int block_depth = 0;
4799
4800 while (block != NULL)
4801 {
4802 block_depth += 1;
4803 ada_add_block_symbols (obstackp, block, name, domain, NULL, wild_match);
4804
4805 /* If we found a non-function match, assume that's the one. */
4806 if (is_nonfunction (defns_collected (obstackp, 0),
4807 num_defns_collected (obstackp)))
4808 return;
4809
4810 block = BLOCK_SUPERBLOCK (block);
4811 }
4812
4813 /* If no luck so far, try to find NAME as a local symbol in some lexically
4814 enclosing subprogram. */
4815 if (num_defns_collected (obstackp) == 0 && block_depth > 2)
4816 add_symbols_from_enclosing_procs (obstackp, name, domain, wild_match);
4817}
4818
ccefe4c4 4819/* An object of this type is used as the user_data argument when
40658b94 4820 calling the map_matching_symbols method. */
ccefe4c4 4821
40658b94 4822struct match_data
ccefe4c4 4823{
40658b94 4824 struct objfile *objfile;
ccefe4c4 4825 struct obstack *obstackp;
40658b94
PH
4826 struct symbol *arg_sym;
4827 int found_sym;
ccefe4c4
TT
4828};
4829
40658b94
PH
4830/* A callback for add_matching_symbols that adds SYM, found in BLOCK,
4831 to a list of symbols. DATA0 is a pointer to a struct match_data *
4832 containing the obstack that collects the symbol list, the file that SYM
4833 must come from, a flag indicating whether a non-argument symbol has
4834 been found in the current block, and the last argument symbol
4835 passed in SYM within the current block (if any). When SYM is null,
4836 marking the end of a block, the argument symbol is added if no
4837 other has been found. */
ccefe4c4 4838
40658b94
PH
4839static int
4840aux_add_nonlocal_symbols (struct block *block, struct symbol *sym, void *data0)
ccefe4c4 4841{
40658b94
PH
4842 struct match_data *data = (struct match_data *) data0;
4843
4844 if (sym == NULL)
4845 {
4846 if (!data->found_sym && data->arg_sym != NULL)
4847 add_defn_to_vec (data->obstackp,
4848 fixup_symbol_section (data->arg_sym, data->objfile),
4849 block);
4850 data->found_sym = 0;
4851 data->arg_sym = NULL;
4852 }
4853 else
4854 {
4855 if (SYMBOL_CLASS (sym) == LOC_UNRESOLVED)
4856 return 0;
4857 else if (SYMBOL_IS_ARGUMENT (sym))
4858 data->arg_sym = sym;
4859 else
4860 {
4861 data->found_sym = 1;
4862 add_defn_to_vec (data->obstackp,
4863 fixup_symbol_section (sym, data->objfile),
4864 block);
4865 }
4866 }
4867 return 0;
4868}
4869
4870/* Compare STRING1 to STRING2, with results as for strcmp.
4871 Compatible with strcmp_iw in that strcmp_iw (STRING1, STRING2) <= 0
4872 implies compare_names (STRING1, STRING2) (they may differ as to
4873 what symbols compare equal). */
5b4ee69b 4874
40658b94
PH
4875static int
4876compare_names (const char *string1, const char *string2)
4877{
4878 while (*string1 != '\0' && *string2 != '\0')
4879 {
4880 if (isspace (*string1) || isspace (*string2))
4881 return strcmp_iw_ordered (string1, string2);
4882 if (*string1 != *string2)
4883 break;
4884 string1 += 1;
4885 string2 += 1;
4886 }
4887 switch (*string1)
4888 {
4889 case '(':
4890 return strcmp_iw_ordered (string1, string2);
4891 case '_':
4892 if (*string2 == '\0')
4893 {
052874e8 4894 if (is_name_suffix (string1))
40658b94
PH
4895 return 0;
4896 else
4897 return -1;
4898 }
dbb8534f 4899 /* FALLTHROUGH */
40658b94
PH
4900 default:
4901 if (*string2 == '(')
4902 return strcmp_iw_ordered (string1, string2);
4903 else
4904 return *string1 - *string2;
4905 }
ccefe4c4
TT
4906}
4907
339c13b6
JB
4908/* Add to OBSTACKP all non-local symbols whose name and domain match
4909 NAME and DOMAIN respectively. The search is performed on GLOBAL_BLOCK
4910 symbols if GLOBAL is non-zero, or on STATIC_BLOCK symbols otherwise. */
4911
4912static void
40658b94
PH
4913add_nonlocal_symbols (struct obstack *obstackp, const char *name,
4914 domain_enum domain, int global,
4915 int is_wild_match)
339c13b6
JB
4916{
4917 struct objfile *objfile;
40658b94 4918 struct match_data data;
339c13b6 4919
ccefe4c4 4920 data.obstackp = obstackp;
40658b94 4921 data.arg_sym = NULL;
339c13b6 4922
ccefe4c4 4923 ALL_OBJFILES (objfile)
40658b94
PH
4924 {
4925 data.objfile = objfile;
4926
4927 if (is_wild_match)
4928 objfile->sf->qf->map_matching_symbols (name, domain, objfile, global,
4929 aux_add_nonlocal_symbols, &data,
4930 wild_match, NULL);
4931 else
4932 objfile->sf->qf->map_matching_symbols (name, domain, objfile, global,
4933 aux_add_nonlocal_symbols, &data,
4934 full_match, compare_names);
4935 }
4936
4937 if (num_defns_collected (obstackp) == 0 && global && !is_wild_match)
4938 {
4939 ALL_OBJFILES (objfile)
4940 {
4941 char *name1 = alloca (strlen (name) + sizeof ("_ada_"));
4942 strcpy (name1, "_ada_");
4943 strcpy (name1 + sizeof ("_ada_") - 1, name);
4944 data.objfile = objfile;
0963b4bd
MS
4945 objfile->sf->qf->map_matching_symbols (name1, domain,
4946 objfile, global,
4947 aux_add_nonlocal_symbols,
4948 &data,
40658b94
PH
4949 full_match, compare_names);
4950 }
4951 }
339c13b6
JB
4952}
4953
4c4b4cd2
PH
4954/* Find symbols in DOMAIN matching NAME0, in BLOCK0 and enclosing
4955 scope and in global scopes, returning the number of matches. Sets
6c9353d3 4956 *RESULTS to point to a vector of (SYM,BLOCK) tuples,
4c4b4cd2
PH
4957 indicating the symbols found and the blocks and symbol tables (if
4958 any) in which they were found. This vector are transient---good only to
4959 the next call of ada_lookup_symbol_list. Any non-function/non-enumeral
4960 symbol match within the nest of blocks whose innermost member is BLOCK0,
4961 is the one match returned (no other matches in that or
4962 enclosing blocks is returned). If there are any matches in or
4963 surrounding BLOCK0, then these alone are returned. Otherwise, the
4964 search extends to global and file-scope (static) symbol tables.
4965 Names prefixed with "standard__" are handled specially: "standard__"
4966 is first stripped off, and only static and global symbols are searched. */
14f9c5c9
AS
4967
4968int
4c4b4cd2 4969ada_lookup_symbol_list (const char *name0, const struct block *block0,
76a01679
JB
4970 domain_enum namespace,
4971 struct ada_symbol_info **results)
14f9c5c9
AS
4972{
4973 struct symbol *sym;
14f9c5c9 4974 struct block *block;
4c4b4cd2 4975 const char *name;
4c4b4cd2 4976 int wild_match;
14f9c5c9 4977 int cacheIfUnique;
4c4b4cd2 4978 int ndefns;
14f9c5c9 4979
4c4b4cd2
PH
4980 obstack_free (&symbol_list_obstack, NULL);
4981 obstack_init (&symbol_list_obstack);
14f9c5c9 4982
14f9c5c9
AS
4983 cacheIfUnique = 0;
4984
4985 /* Search specified block and its superiors. */
4986
4c4b4cd2
PH
4987 wild_match = (strstr (name0, "__") == NULL);
4988 name = name0;
76a01679
JB
4989 block = (struct block *) block0; /* FIXME: No cast ought to be
4990 needed, but adding const will
4991 have a cascade effect. */
339c13b6
JB
4992
4993 /* Special case: If the user specifies a symbol name inside package
4994 Standard, do a non-wild matching of the symbol name without
4995 the "standard__" prefix. This was primarily introduced in order
4996 to allow the user to specifically access the standard exceptions
4997 using, for instance, Standard.Constraint_Error when Constraint_Error
4998 is ambiguous (due to the user defining its own Constraint_Error
4999 entity inside its program). */
4c4b4cd2
PH
5000 if (strncmp (name0, "standard__", sizeof ("standard__") - 1) == 0)
5001 {
5002 wild_match = 0;
5003 block = NULL;
5004 name = name0 + sizeof ("standard__") - 1;
5005 }
5006
339c13b6 5007 /* Check the non-global symbols. If we have ANY match, then we're done. */
14f9c5c9 5008
339c13b6
JB
5009 ada_add_local_symbols (&symbol_list_obstack, name, block, namespace,
5010 wild_match);
4c4b4cd2 5011 if (num_defns_collected (&symbol_list_obstack) > 0)
14f9c5c9 5012 goto done;
d2e4a39e 5013
339c13b6
JB
5014 /* No non-global symbols found. Check our cache to see if we have
5015 already performed this search before. If we have, then return
5016 the same result. */
5017
14f9c5c9 5018 cacheIfUnique = 1;
2570f2b7 5019 if (lookup_cached_symbol (name0, namespace, &sym, &block))
4c4b4cd2
PH
5020 {
5021 if (sym != NULL)
2570f2b7 5022 add_defn_to_vec (&symbol_list_obstack, sym, block);
4c4b4cd2
PH
5023 goto done;
5024 }
14f9c5c9 5025
339c13b6
JB
5026 /* Search symbols from all global blocks. */
5027
40658b94
PH
5028 add_nonlocal_symbols (&symbol_list_obstack, name, namespace, 1,
5029 wild_match);
d2e4a39e 5030
4c4b4cd2 5031 /* Now add symbols from all per-file blocks if we've gotten no hits
339c13b6 5032 (not strictly correct, but perhaps better than an error). */
d2e4a39e 5033
4c4b4cd2 5034 if (num_defns_collected (&symbol_list_obstack) == 0)
40658b94
PH
5035 add_nonlocal_symbols (&symbol_list_obstack, name, namespace, 0,
5036 wild_match);
14f9c5c9 5037
4c4b4cd2
PH
5038done:
5039 ndefns = num_defns_collected (&symbol_list_obstack);
5040 *results = defns_collected (&symbol_list_obstack, 1);
5041
5042 ndefns = remove_extra_symbols (*results, ndefns);
5043
d2e4a39e 5044 if (ndefns == 0)
2570f2b7 5045 cache_symbol (name0, namespace, NULL, NULL);
14f9c5c9 5046
4c4b4cd2 5047 if (ndefns == 1 && cacheIfUnique)
2570f2b7 5048 cache_symbol (name0, namespace, (*results)[0].sym, (*results)[0].block);
14f9c5c9 5049
aeb5907d 5050 ndefns = remove_irrelevant_renamings (*results, ndefns, block0);
14f9c5c9 5051
14f9c5c9
AS
5052 return ndefns;
5053}
5054
d2e4a39e 5055struct symbol *
aeb5907d 5056ada_lookup_encoded_symbol (const char *name, const struct block *block0,
21b556f4 5057 domain_enum namespace, struct block **block_found)
14f9c5c9 5058{
4c4b4cd2 5059 struct ada_symbol_info *candidates;
14f9c5c9
AS
5060 int n_candidates;
5061
aeb5907d 5062 n_candidates = ada_lookup_symbol_list (name, block0, namespace, &candidates);
14f9c5c9
AS
5063
5064 if (n_candidates == 0)
5065 return NULL;
4c4b4cd2 5066
aeb5907d
JB
5067 if (block_found != NULL)
5068 *block_found = candidates[0].block;
4c4b4cd2 5069
21b556f4 5070 return fixup_symbol_section (candidates[0].sym, NULL);
aeb5907d
JB
5071}
5072
5073/* Return a symbol in DOMAIN matching NAME, in BLOCK0 and enclosing
5074 scope and in global scopes, or NULL if none. NAME is folded and
5075 encoded first. Otherwise, the result is as for ada_lookup_symbol_list,
0963b4bd 5076 choosing the first symbol if there are multiple choices.
aeb5907d
JB
5077 *IS_A_FIELD_OF_THIS is set to 0 and *SYMTAB is set to the symbol
5078 table in which the symbol was found (in both cases, these
5079 assignments occur only if the pointers are non-null). */
5080struct symbol *
5081ada_lookup_symbol (const char *name, const struct block *block0,
21b556f4 5082 domain_enum namespace, int *is_a_field_of_this)
aeb5907d
JB
5083{
5084 if (is_a_field_of_this != NULL)
5085 *is_a_field_of_this = 0;
5086
5087 return
5088 ada_lookup_encoded_symbol (ada_encode (ada_fold_name (name)),
21b556f4 5089 block0, namespace, NULL);
4c4b4cd2 5090}
14f9c5c9 5091
4c4b4cd2
PH
5092static struct symbol *
5093ada_lookup_symbol_nonlocal (const char *name,
76a01679 5094 const struct block *block,
21b556f4 5095 const domain_enum domain)
4c4b4cd2 5096{
94af9270 5097 return ada_lookup_symbol (name, block_static_block (block), domain, NULL);
14f9c5c9
AS
5098}
5099
5100
4c4b4cd2
PH
5101/* True iff STR is a possible encoded suffix of a normal Ada name
5102 that is to be ignored for matching purposes. Suffixes of parallel
5103 names (e.g., XVE) are not included here. Currently, the possible suffixes
5823c3ef 5104 are given by any of the regular expressions:
4c4b4cd2 5105
babe1480
JB
5106 [.$][0-9]+ [nested subprogram suffix, on platforms such as GNU/Linux]
5107 ___[0-9]+ [nested subprogram suffix, on platforms such as HP/UX]
5108 _E[0-9]+[bs]$ [protected object entry suffixes]
61ee279c 5109 (X[nb]*)?((\$|__)[0-9](_?[0-9]+)|___(JM|LJM|X([FDBUP].*|R[^T]?)))?$
babe1480
JB
5110
5111 Also, any leading "__[0-9]+" sequence is skipped before the suffix
5112 match is performed. This sequence is used to differentiate homonyms,
5113 is an optional part of a valid name suffix. */
4c4b4cd2 5114
14f9c5c9 5115static int
d2e4a39e 5116is_name_suffix (const char *str)
14f9c5c9
AS
5117{
5118 int k;
4c4b4cd2
PH
5119 const char *matching;
5120 const int len = strlen (str);
5121
babe1480
JB
5122 /* Skip optional leading __[0-9]+. */
5123
4c4b4cd2
PH
5124 if (len > 3 && str[0] == '_' && str[1] == '_' && isdigit (str[2]))
5125 {
babe1480
JB
5126 str += 3;
5127 while (isdigit (str[0]))
5128 str += 1;
4c4b4cd2 5129 }
babe1480
JB
5130
5131 /* [.$][0-9]+ */
4c4b4cd2 5132
babe1480 5133 if (str[0] == '.' || str[0] == '$')
4c4b4cd2 5134 {
babe1480 5135 matching = str + 1;
4c4b4cd2
PH
5136 while (isdigit (matching[0]))
5137 matching += 1;
5138 if (matching[0] == '\0')
5139 return 1;
5140 }
5141
5142 /* ___[0-9]+ */
babe1480 5143
4c4b4cd2
PH
5144 if (len > 3 && str[0] == '_' && str[1] == '_' && str[2] == '_')
5145 {
5146 matching = str + 3;
5147 while (isdigit (matching[0]))
5148 matching += 1;
5149 if (matching[0] == '\0')
5150 return 1;
5151 }
5152
529cad9c
PH
5153#if 0
5154 /* FIXME: brobecker/2005-09-23: Protected Object subprograms end
0963b4bd
MS
5155 with a N at the end. Unfortunately, the compiler uses the same
5156 convention for other internal types it creates. So treating
529cad9c 5157 all entity names that end with an "N" as a name suffix causes
0963b4bd
MS
5158 some regressions. For instance, consider the case of an enumerated
5159 type. To support the 'Image attribute, it creates an array whose
529cad9c
PH
5160 name ends with N.
5161 Having a single character like this as a suffix carrying some
0963b4bd 5162 information is a bit risky. Perhaps we should change the encoding
529cad9c
PH
5163 to be something like "_N" instead. In the meantime, do not do
5164 the following check. */
5165 /* Protected Object Subprograms */
5166 if (len == 1 && str [0] == 'N')
5167 return 1;
5168#endif
5169
5170 /* _E[0-9]+[bs]$ */
5171 if (len > 3 && str[0] == '_' && str [1] == 'E' && isdigit (str[2]))
5172 {
5173 matching = str + 3;
5174 while (isdigit (matching[0]))
5175 matching += 1;
5176 if ((matching[0] == 'b' || matching[0] == 's')
5177 && matching [1] == '\0')
5178 return 1;
5179 }
5180
4c4b4cd2
PH
5181 /* ??? We should not modify STR directly, as we are doing below. This
5182 is fine in this case, but may become problematic later if we find
5183 that this alternative did not work, and want to try matching
5184 another one from the begining of STR. Since we modified it, we
5185 won't be able to find the begining of the string anymore! */
14f9c5c9
AS
5186 if (str[0] == 'X')
5187 {
5188 str += 1;
d2e4a39e 5189 while (str[0] != '_' && str[0] != '\0')
4c4b4cd2
PH
5190 {
5191 if (str[0] != 'n' && str[0] != 'b')
5192 return 0;
5193 str += 1;
5194 }
14f9c5c9 5195 }
babe1480 5196
14f9c5c9
AS
5197 if (str[0] == '\000')
5198 return 1;
babe1480 5199
d2e4a39e 5200 if (str[0] == '_')
14f9c5c9
AS
5201 {
5202 if (str[1] != '_' || str[2] == '\000')
4c4b4cd2 5203 return 0;
d2e4a39e 5204 if (str[2] == '_')
4c4b4cd2 5205 {
61ee279c
PH
5206 if (strcmp (str + 3, "JM") == 0)
5207 return 1;
5208 /* FIXME: brobecker/2004-09-30: GNAT will soon stop using
5209 the LJM suffix in favor of the JM one. But we will
5210 still accept LJM as a valid suffix for a reasonable
5211 amount of time, just to allow ourselves to debug programs
5212 compiled using an older version of GNAT. */
4c4b4cd2
PH
5213 if (strcmp (str + 3, "LJM") == 0)
5214 return 1;
5215 if (str[3] != 'X')
5216 return 0;
1265e4aa
JB
5217 if (str[4] == 'F' || str[4] == 'D' || str[4] == 'B'
5218 || str[4] == 'U' || str[4] == 'P')
4c4b4cd2
PH
5219 return 1;
5220 if (str[4] == 'R' && str[5] != 'T')
5221 return 1;
5222 return 0;
5223 }
5224 if (!isdigit (str[2]))
5225 return 0;
5226 for (k = 3; str[k] != '\0'; k += 1)
5227 if (!isdigit (str[k]) && str[k] != '_')
5228 return 0;
14f9c5c9
AS
5229 return 1;
5230 }
4c4b4cd2 5231 if (str[0] == '$' && isdigit (str[1]))
14f9c5c9 5232 {
4c4b4cd2
PH
5233 for (k = 2; str[k] != '\0'; k += 1)
5234 if (!isdigit (str[k]) && str[k] != '_')
5235 return 0;
14f9c5c9
AS
5236 return 1;
5237 }
5238 return 0;
5239}
d2e4a39e 5240
aeb5907d
JB
5241/* Return non-zero if the string starting at NAME and ending before
5242 NAME_END contains no capital letters. */
529cad9c
PH
5243
5244static int
5245is_valid_name_for_wild_match (const char *name0)
5246{
5247 const char *decoded_name = ada_decode (name0);
5248 int i;
5249
5823c3ef
JB
5250 /* If the decoded name starts with an angle bracket, it means that
5251 NAME0 does not follow the GNAT encoding format. It should then
5252 not be allowed as a possible wild match. */
5253 if (decoded_name[0] == '<')
5254 return 0;
5255
529cad9c
PH
5256 for (i=0; decoded_name[i] != '\0'; i++)
5257 if (isalpha (decoded_name[i]) && !islower (decoded_name[i]))
5258 return 0;
5259
5260 return 1;
5261}
5262
73589123
PH
5263/* Advance *NAMEP to next occurrence of TARGET0 in the string NAME0
5264 that could start a simple name. Assumes that *NAMEP points into
5265 the string beginning at NAME0. */
4c4b4cd2 5266
14f9c5c9 5267static int
73589123 5268advance_wild_match (const char **namep, const char *name0, int target0)
14f9c5c9 5269{
73589123 5270 const char *name = *namep;
5b4ee69b 5271
5823c3ef 5272 while (1)
14f9c5c9 5273 {
aa27d0b3 5274 int t0, t1;
73589123
PH
5275
5276 t0 = *name;
5277 if (t0 == '_')
5278 {
5279 t1 = name[1];
5280 if ((t1 >= 'a' && t1 <= 'z') || (t1 >= '0' && t1 <= '9'))
5281 {
5282 name += 1;
5283 if (name == name0 + 5 && strncmp (name0, "_ada", 4) == 0)
5284 break;
5285 else
5286 name += 1;
5287 }
aa27d0b3
JB
5288 else if (t1 == '_' && ((name[2] >= 'a' && name[2] <= 'z')
5289 || name[2] == target0))
73589123
PH
5290 {
5291 name += 2;
5292 break;
5293 }
5294 else
5295 return 0;
5296 }
5297 else if ((t0 >= 'a' && t0 <= 'z') || (t0 >= '0' && t0 <= '9'))
5298 name += 1;
5299 else
5823c3ef 5300 return 0;
73589123
PH
5301 }
5302
5303 *namep = name;
5304 return 1;
5305}
5306
5307/* Return 0 iff NAME encodes a name of the form prefix.PATN. Ignores any
5308 informational suffixes of NAME (i.e., for which is_name_suffix is
5309 true). Assumes that PATN is a lower-cased Ada simple name. */
5310
5311static int
5312wild_match (const char *name, const char *patn)
5313{
5314 const char *p, *n;
5315 const char *name0 = name;
5316
5317 while (1)
5318 {
5319 const char *match = name;
5320
5321 if (*name == *patn)
5322 {
5323 for (name += 1, p = patn + 1; *p != '\0'; name += 1, p += 1)
5324 if (*p != *name)
5325 break;
5326 if (*p == '\0' && is_name_suffix (name))
5327 return match != name0 && !is_valid_name_for_wild_match (name0);
5328
5329 if (name[-1] == '_')
5330 name -= 1;
5331 }
5332 if (!advance_wild_match (&name, name0, *patn))
5333 return 1;
96d887e8 5334 }
96d887e8
PH
5335}
5336
40658b94
PH
5337/* Returns 0 iff symbol name SYM_NAME matches SEARCH_NAME, apart from
5338 informational suffix. */
5339
c4d840bd
PH
5340static int
5341full_match (const char *sym_name, const char *search_name)
5342{
40658b94 5343 return !match_name (sym_name, search_name, 0);
c4d840bd
PH
5344}
5345
5346
96d887e8
PH
5347/* Add symbols from BLOCK matching identifier NAME in DOMAIN to
5348 vector *defn_symbols, updating the list of symbols in OBSTACKP
0963b4bd 5349 (if necessary). If WILD, treat as NAME with a wildcard prefix.
96d887e8
PH
5350 OBJFILE is the section containing BLOCK.
5351 SYMTAB is recorded with each symbol added. */
5352
5353static void
5354ada_add_block_symbols (struct obstack *obstackp,
76a01679 5355 struct block *block, const char *name,
96d887e8 5356 domain_enum domain, struct objfile *objfile,
2570f2b7 5357 int wild)
96d887e8
PH
5358{
5359 struct dict_iterator iter;
5360 int name_len = strlen (name);
5361 /* A matching argument symbol, if any. */
5362 struct symbol *arg_sym;
5363 /* Set true when we find a matching non-argument symbol. */
5364 int found_sym;
5365 struct symbol *sym;
5366
5367 arg_sym = NULL;
5368 found_sym = 0;
5369 if (wild)
5370 {
c4d840bd
PH
5371 for (sym = dict_iter_match_first (BLOCK_DICT (block), name,
5372 wild_match, &iter);
5373 sym != NULL; sym = dict_iter_match_next (name, wild_match, &iter))
76a01679 5374 {
5eeb2539
AR
5375 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
5376 SYMBOL_DOMAIN (sym), domain)
73589123 5377 && wild_match (SYMBOL_LINKAGE_NAME (sym), name) == 0)
76a01679 5378 {
2a2d4dc3
AS
5379 if (SYMBOL_CLASS (sym) == LOC_UNRESOLVED)
5380 continue;
5381 else if (SYMBOL_IS_ARGUMENT (sym))
5382 arg_sym = sym;
5383 else
5384 {
76a01679
JB
5385 found_sym = 1;
5386 add_defn_to_vec (obstackp,
5387 fixup_symbol_section (sym, objfile),
2570f2b7 5388 block);
76a01679
JB
5389 }
5390 }
5391 }
96d887e8
PH
5392 }
5393 else
5394 {
c4d840bd 5395 for (sym = dict_iter_match_first (BLOCK_DICT (block), name,
40658b94 5396 full_match, &iter);
c4d840bd 5397 sym != NULL; sym = dict_iter_match_next (name, full_match, &iter))
76a01679 5398 {
5eeb2539
AR
5399 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
5400 SYMBOL_DOMAIN (sym), domain))
76a01679 5401 {
c4d840bd
PH
5402 if (SYMBOL_CLASS (sym) != LOC_UNRESOLVED)
5403 {
5404 if (SYMBOL_IS_ARGUMENT (sym))
5405 arg_sym = sym;
5406 else
2a2d4dc3 5407 {
c4d840bd
PH
5408 found_sym = 1;
5409 add_defn_to_vec (obstackp,
5410 fixup_symbol_section (sym, objfile),
5411 block);
2a2d4dc3 5412 }
c4d840bd 5413 }
76a01679
JB
5414 }
5415 }
96d887e8
PH
5416 }
5417
5418 if (!found_sym && arg_sym != NULL)
5419 {
76a01679
JB
5420 add_defn_to_vec (obstackp,
5421 fixup_symbol_section (arg_sym, objfile),
2570f2b7 5422 block);
96d887e8
PH
5423 }
5424
5425 if (!wild)
5426 {
5427 arg_sym = NULL;
5428 found_sym = 0;
5429
5430 ALL_BLOCK_SYMBOLS (block, iter, sym)
76a01679 5431 {
5eeb2539
AR
5432 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
5433 SYMBOL_DOMAIN (sym), domain))
76a01679
JB
5434 {
5435 int cmp;
5436
5437 cmp = (int) '_' - (int) SYMBOL_LINKAGE_NAME (sym)[0];
5438 if (cmp == 0)
5439 {
5440 cmp = strncmp ("_ada_", SYMBOL_LINKAGE_NAME (sym), 5);
5441 if (cmp == 0)
5442 cmp = strncmp (name, SYMBOL_LINKAGE_NAME (sym) + 5,
5443 name_len);
5444 }
5445
5446 if (cmp == 0
5447 && is_name_suffix (SYMBOL_LINKAGE_NAME (sym) + name_len + 5))
5448 {
2a2d4dc3
AS
5449 if (SYMBOL_CLASS (sym) != LOC_UNRESOLVED)
5450 {
5451 if (SYMBOL_IS_ARGUMENT (sym))
5452 arg_sym = sym;
5453 else
5454 {
5455 found_sym = 1;
5456 add_defn_to_vec (obstackp,
5457 fixup_symbol_section (sym, objfile),
5458 block);
5459 }
5460 }
76a01679
JB
5461 }
5462 }
76a01679 5463 }
96d887e8
PH
5464
5465 /* NOTE: This really shouldn't be needed for _ada_ symbols.
5466 They aren't parameters, right? */
5467 if (!found_sym && arg_sym != NULL)
5468 {
5469 add_defn_to_vec (obstackp,
76a01679 5470 fixup_symbol_section (arg_sym, objfile),
2570f2b7 5471 block);
96d887e8
PH
5472 }
5473 }
5474}
5475\f
41d27058
JB
5476
5477 /* Symbol Completion */
5478
5479/* If SYM_NAME is a completion candidate for TEXT, return this symbol
5480 name in a form that's appropriate for the completion. The result
5481 does not need to be deallocated, but is only good until the next call.
5482
5483 TEXT_LEN is equal to the length of TEXT.
5484 Perform a wild match if WILD_MATCH is set.
5485 ENCODED should be set if TEXT represents the start of a symbol name
5486 in its encoded form. */
5487
5488static const char *
5489symbol_completion_match (const char *sym_name,
5490 const char *text, int text_len,
5491 int wild_match, int encoded)
5492{
41d27058
JB
5493 const int verbatim_match = (text[0] == '<');
5494 int match = 0;
5495
5496 if (verbatim_match)
5497 {
5498 /* Strip the leading angle bracket. */
5499 text = text + 1;
5500 text_len--;
5501 }
5502
5503 /* First, test against the fully qualified name of the symbol. */
5504
5505 if (strncmp (sym_name, text, text_len) == 0)
5506 match = 1;
5507
5508 if (match && !encoded)
5509 {
5510 /* One needed check before declaring a positive match is to verify
5511 that iff we are doing a verbatim match, the decoded version
5512 of the symbol name starts with '<'. Otherwise, this symbol name
5513 is not a suitable completion. */
5514 const char *sym_name_copy = sym_name;
5515 int has_angle_bracket;
5516
5517 sym_name = ada_decode (sym_name);
5518 has_angle_bracket = (sym_name[0] == '<');
5519 match = (has_angle_bracket == verbatim_match);
5520 sym_name = sym_name_copy;
5521 }
5522
5523 if (match && !verbatim_match)
5524 {
5525 /* When doing non-verbatim match, another check that needs to
5526 be done is to verify that the potentially matching symbol name
5527 does not include capital letters, because the ada-mode would
5528 not be able to understand these symbol names without the
5529 angle bracket notation. */
5530 const char *tmp;
5531
5532 for (tmp = sym_name; *tmp != '\0' && !isupper (*tmp); tmp++);
5533 if (*tmp != '\0')
5534 match = 0;
5535 }
5536
5537 /* Second: Try wild matching... */
5538
5539 if (!match && wild_match)
5540 {
5541 /* Since we are doing wild matching, this means that TEXT
5542 may represent an unqualified symbol name. We therefore must
5543 also compare TEXT against the unqualified name of the symbol. */
5544 sym_name = ada_unqualified_name (ada_decode (sym_name));
5545
5546 if (strncmp (sym_name, text, text_len) == 0)
5547 match = 1;
5548 }
5549
5550 /* Finally: If we found a mach, prepare the result to return. */
5551
5552 if (!match)
5553 return NULL;
5554
5555 if (verbatim_match)
5556 sym_name = add_angle_brackets (sym_name);
5557
5558 if (!encoded)
5559 sym_name = ada_decode (sym_name);
5560
5561 return sym_name;
5562}
5563
2ba95b9b
JB
5564DEF_VEC_P (char_ptr);
5565
41d27058
JB
5566/* A companion function to ada_make_symbol_completion_list().
5567 Check if SYM_NAME represents a symbol which name would be suitable
5568 to complete TEXT (TEXT_LEN is the length of TEXT), in which case
5569 it is appended at the end of the given string vector SV.
5570
5571 ORIG_TEXT is the string original string from the user command
5572 that needs to be completed. WORD is the entire command on which
5573 completion should be performed. These two parameters are used to
5574 determine which part of the symbol name should be added to the
5575 completion vector.
5576 if WILD_MATCH is set, then wild matching is performed.
5577 ENCODED should be set if TEXT represents a symbol name in its
5578 encoded formed (in which case the completion should also be
5579 encoded). */
5580
5581static void
d6565258 5582symbol_completion_add (VEC(char_ptr) **sv,
41d27058
JB
5583 const char *sym_name,
5584 const char *text, int text_len,
5585 const char *orig_text, const char *word,
5586 int wild_match, int encoded)
5587{
5588 const char *match = symbol_completion_match (sym_name, text, text_len,
5589 wild_match, encoded);
5590 char *completion;
5591
5592 if (match == NULL)
5593 return;
5594
5595 /* We found a match, so add the appropriate completion to the given
5596 string vector. */
5597
5598 if (word == orig_text)
5599 {
5600 completion = xmalloc (strlen (match) + 5);
5601 strcpy (completion, match);
5602 }
5603 else if (word > orig_text)
5604 {
5605 /* Return some portion of sym_name. */
5606 completion = xmalloc (strlen (match) + 5);
5607 strcpy (completion, match + (word - orig_text));
5608 }
5609 else
5610 {
5611 /* Return some of ORIG_TEXT plus sym_name. */
5612 completion = xmalloc (strlen (match) + (orig_text - word) + 5);
5613 strncpy (completion, word, orig_text - word);
5614 completion[orig_text - word] = '\0';
5615 strcat (completion, match);
5616 }
5617
d6565258 5618 VEC_safe_push (char_ptr, *sv, completion);
41d27058
JB
5619}
5620
ccefe4c4 5621/* An object of this type is passed as the user_data argument to the
7b08b9eb 5622 expand_partial_symbol_names method. */
ccefe4c4
TT
5623struct add_partial_datum
5624{
5625 VEC(char_ptr) **completions;
5626 char *text;
5627 int text_len;
5628 char *text0;
5629 char *word;
5630 int wild_match;
5631 int encoded;
5632};
5633
7b08b9eb
JK
5634/* A callback for expand_partial_symbol_names. */
5635static int
5636ada_expand_partial_symbol_name (const char *name, void *user_data)
ccefe4c4
TT
5637{
5638 struct add_partial_datum *data = user_data;
7b08b9eb
JK
5639
5640 return symbol_completion_match (name, data->text, data->text_len,
5641 data->wild_match, data->encoded) != NULL;
ccefe4c4
TT
5642}
5643
41d27058
JB
5644/* Return a list of possible symbol names completing TEXT0. The list
5645 is NULL terminated. WORD is the entire command on which completion
5646 is made. */
5647
5648static char **
5649ada_make_symbol_completion_list (char *text0, char *word)
5650{
5651 char *text;
5652 int text_len;
5653 int wild_match;
5654 int encoded;
2ba95b9b 5655 VEC(char_ptr) *completions = VEC_alloc (char_ptr, 128);
41d27058
JB
5656 struct symbol *sym;
5657 struct symtab *s;
41d27058
JB
5658 struct minimal_symbol *msymbol;
5659 struct objfile *objfile;
5660 struct block *b, *surrounding_static_block = 0;
5661 int i;
5662 struct dict_iterator iter;
5663
5664 if (text0[0] == '<')
5665 {
5666 text = xstrdup (text0);
5667 make_cleanup (xfree, text);
5668 text_len = strlen (text);
5669 wild_match = 0;
5670 encoded = 1;
5671 }
5672 else
5673 {
5674 text = xstrdup (ada_encode (text0));
5675 make_cleanup (xfree, text);
5676 text_len = strlen (text);
5677 for (i = 0; i < text_len; i++)
5678 text[i] = tolower (text[i]);
5679
5680 encoded = (strstr (text0, "__") != NULL);
5681 /* If the name contains a ".", then the user is entering a fully
5682 qualified entity name, and the match must not be done in wild
5683 mode. Similarly, if the user wants to complete what looks like
5684 an encoded name, the match must not be done in wild mode. */
5685 wild_match = (strchr (text0, '.') == NULL && !encoded);
5686 }
5687
5688 /* First, look at the partial symtab symbols. */
41d27058 5689 {
ccefe4c4
TT
5690 struct add_partial_datum data;
5691
5692 data.completions = &completions;
5693 data.text = text;
5694 data.text_len = text_len;
5695 data.text0 = text0;
5696 data.word = word;
5697 data.wild_match = wild_match;
5698 data.encoded = encoded;
7b08b9eb 5699 expand_partial_symbol_names (ada_expand_partial_symbol_name, &data);
41d27058
JB
5700 }
5701
5702 /* At this point scan through the misc symbol vectors and add each
5703 symbol you find to the list. Eventually we want to ignore
5704 anything that isn't a text symbol (everything else will be
5705 handled by the psymtab code above). */
5706
5707 ALL_MSYMBOLS (objfile, msymbol)
5708 {
5709 QUIT;
d6565258 5710 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (msymbol),
41d27058
JB
5711 text, text_len, text0, word, wild_match, encoded);
5712 }
5713
5714 /* Search upwards from currently selected frame (so that we can
5715 complete on local vars. */
5716
5717 for (b = get_selected_block (0); b != NULL; b = BLOCK_SUPERBLOCK (b))
5718 {
5719 if (!BLOCK_SUPERBLOCK (b))
5720 surrounding_static_block = b; /* For elmin of dups */
5721
5722 ALL_BLOCK_SYMBOLS (b, iter, sym)
5723 {
d6565258 5724 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
41d27058
JB
5725 text, text_len, text0, word,
5726 wild_match, encoded);
5727 }
5728 }
5729
5730 /* Go through the symtabs and check the externs and statics for
5731 symbols which match. */
5732
5733 ALL_SYMTABS (objfile, s)
5734 {
5735 QUIT;
5736 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
5737 ALL_BLOCK_SYMBOLS (b, iter, sym)
5738 {
d6565258 5739 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
41d27058
JB
5740 text, text_len, text0, word,
5741 wild_match, encoded);
5742 }
5743 }
5744
5745 ALL_SYMTABS (objfile, s)
5746 {
5747 QUIT;
5748 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
5749 /* Don't do this block twice. */
5750 if (b == surrounding_static_block)
5751 continue;
5752 ALL_BLOCK_SYMBOLS (b, iter, sym)
5753 {
d6565258 5754 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
41d27058
JB
5755 text, text_len, text0, word,
5756 wild_match, encoded);
5757 }
5758 }
5759
5760 /* Append the closing NULL entry. */
2ba95b9b 5761 VEC_safe_push (char_ptr, completions, NULL);
41d27058 5762
2ba95b9b
JB
5763 /* Make a copy of the COMPLETIONS VEC before we free it, and then
5764 return the copy. It's unfortunate that we have to make a copy
5765 of an array that we're about to destroy, but there is nothing much
5766 we can do about it. Fortunately, it's typically not a very large
5767 array. */
5768 {
5769 const size_t completions_size =
5770 VEC_length (char_ptr, completions) * sizeof (char *);
dc19db01 5771 char **result = xmalloc (completions_size);
2ba95b9b
JB
5772
5773 memcpy (result, VEC_address (char_ptr, completions), completions_size);
5774
5775 VEC_free (char_ptr, completions);
5776 return result;
5777 }
41d27058
JB
5778}
5779
963a6417 5780 /* Field Access */
96d887e8 5781
73fb9985
JB
5782/* Return non-zero if TYPE is a pointer to the GNAT dispatch table used
5783 for tagged types. */
5784
5785static int
5786ada_is_dispatch_table_ptr_type (struct type *type)
5787{
5788 char *name;
5789
5790 if (TYPE_CODE (type) != TYPE_CODE_PTR)
5791 return 0;
5792
5793 name = TYPE_NAME (TYPE_TARGET_TYPE (type));
5794 if (name == NULL)
5795 return 0;
5796
5797 return (strcmp (name, "ada__tags__dispatch_table") == 0);
5798}
5799
963a6417
PH
5800/* True if field number FIELD_NUM in struct or union type TYPE is supposed
5801 to be invisible to users. */
96d887e8 5802
963a6417
PH
5803int
5804ada_is_ignored_field (struct type *type, int field_num)
96d887e8 5805{
963a6417
PH
5806 if (field_num < 0 || field_num > TYPE_NFIELDS (type))
5807 return 1;
73fb9985
JB
5808
5809 /* Check the name of that field. */
5810 {
5811 const char *name = TYPE_FIELD_NAME (type, field_num);
5812
5813 /* Anonymous field names should not be printed.
5814 brobecker/2007-02-20: I don't think this can actually happen
5815 but we don't want to print the value of annonymous fields anyway. */
5816 if (name == NULL)
5817 return 1;
5818
5819 /* A field named "_parent" is internally generated by GNAT for
5820 tagged types, and should not be printed either. */
5821 if (name[0] == '_' && strncmp (name, "_parent", 7) != 0)
5822 return 1;
5823 }
5824
5825 /* If this is the dispatch table of a tagged type, then ignore. */
5826 if (ada_is_tagged_type (type, 1)
5827 && ada_is_dispatch_table_ptr_type (TYPE_FIELD_TYPE (type, field_num)))
5828 return 1;
5829
5830 /* Not a special field, so it should not be ignored. */
5831 return 0;
963a6417 5832}
96d887e8 5833
963a6417 5834/* True iff TYPE has a tag field. If REFOK, then TYPE may also be a
0963b4bd 5835 pointer or reference type whose ultimate target has a tag field. */
96d887e8 5836
963a6417
PH
5837int
5838ada_is_tagged_type (struct type *type, int refok)
5839{
5840 return (ada_lookup_struct_elt_type (type, "_tag", refok, 1, NULL) != NULL);
5841}
96d887e8 5842
963a6417 5843/* True iff TYPE represents the type of X'Tag */
96d887e8 5844
963a6417
PH
5845int
5846ada_is_tag_type (struct type *type)
5847{
5848 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_PTR)
5849 return 0;
5850 else
96d887e8 5851 {
963a6417 5852 const char *name = ada_type_name (TYPE_TARGET_TYPE (type));
5b4ee69b 5853
963a6417
PH
5854 return (name != NULL
5855 && strcmp (name, "ada__tags__dispatch_table") == 0);
96d887e8 5856 }
96d887e8
PH
5857}
5858
963a6417 5859/* The type of the tag on VAL. */
76a01679 5860
963a6417
PH
5861struct type *
5862ada_tag_type (struct value *val)
96d887e8 5863{
df407dfe 5864 return ada_lookup_struct_elt_type (value_type (val), "_tag", 1, 0, NULL);
963a6417 5865}
96d887e8 5866
963a6417 5867/* The value of the tag on VAL. */
96d887e8 5868
963a6417
PH
5869struct value *
5870ada_value_tag (struct value *val)
5871{
03ee6b2e 5872 return ada_value_struct_elt (val, "_tag", 0);
96d887e8
PH
5873}
5874
963a6417
PH
5875/* The value of the tag on the object of type TYPE whose contents are
5876 saved at VALADDR, if it is non-null, or is at memory address
0963b4bd 5877 ADDRESS. */
96d887e8 5878
963a6417 5879static struct value *
10a2c479 5880value_tag_from_contents_and_address (struct type *type,
fc1a4b47 5881 const gdb_byte *valaddr,
963a6417 5882 CORE_ADDR address)
96d887e8 5883{
b5385fc0 5884 int tag_byte_offset;
963a6417 5885 struct type *tag_type;
5b4ee69b 5886
963a6417 5887 if (find_struct_field ("_tag", type, 0, &tag_type, &tag_byte_offset,
52ce6436 5888 NULL, NULL, NULL))
96d887e8 5889 {
fc1a4b47 5890 const gdb_byte *valaddr1 = ((valaddr == NULL)
10a2c479
AC
5891 ? NULL
5892 : valaddr + tag_byte_offset);
963a6417 5893 CORE_ADDR address1 = (address == 0) ? 0 : address + tag_byte_offset;
96d887e8 5894
963a6417 5895 return value_from_contents_and_address (tag_type, valaddr1, address1);
96d887e8 5896 }
963a6417
PH
5897 return NULL;
5898}
96d887e8 5899
963a6417
PH
5900static struct type *
5901type_from_tag (struct value *tag)
5902{
5903 const char *type_name = ada_tag_name (tag);
5b4ee69b 5904
963a6417
PH
5905 if (type_name != NULL)
5906 return ada_find_any_type (ada_encode (type_name));
5907 return NULL;
5908}
96d887e8 5909
963a6417
PH
5910struct tag_args
5911{
5912 struct value *tag;
5913 char *name;
5914};
4c4b4cd2 5915
529cad9c
PH
5916
5917static int ada_tag_name_1 (void *);
5918static int ada_tag_name_2 (struct tag_args *);
5919
4c4b4cd2 5920/* Wrapper function used by ada_tag_name. Given a struct tag_args*
0963b4bd 5921 value ARGS, sets ARGS->name to the tag name of ARGS->tag.
4c4b4cd2
PH
5922 The value stored in ARGS->name is valid until the next call to
5923 ada_tag_name_1. */
5924
5925static int
5926ada_tag_name_1 (void *args0)
5927{
5928 struct tag_args *args = (struct tag_args *) args0;
5929 static char name[1024];
76a01679 5930 char *p;
4c4b4cd2 5931 struct value *val;
5b4ee69b 5932
4c4b4cd2 5933 args->name = NULL;
03ee6b2e 5934 val = ada_value_struct_elt (args->tag, "tsd", 1);
529cad9c
PH
5935 if (val == NULL)
5936 return ada_tag_name_2 (args);
03ee6b2e 5937 val = ada_value_struct_elt (val, "expanded_name", 1);
529cad9c
PH
5938 if (val == NULL)
5939 return 0;
5940 read_memory_string (value_as_address (val), name, sizeof (name) - 1);
5941 for (p = name; *p != '\0'; p += 1)
5942 if (isalpha (*p))
5943 *p = tolower (*p);
5944 args->name = name;
5945 return 0;
5946}
5947
e802dbe0
JB
5948/* Return the "ada__tags__type_specific_data" type. */
5949
5950static struct type *
5951ada_get_tsd_type (struct inferior *inf)
5952{
5953 struct ada_inferior_data *data = get_ada_inferior_data (inf);
5954
5955 if (data->tsd_type == 0)
5956 data->tsd_type = ada_find_any_type ("ada__tags__type_specific_data");
5957 return data->tsd_type;
5958}
5959
529cad9c
PH
5960/* Utility function for ada_tag_name_1 that tries the second
5961 representation for the dispatch table (in which there is no
5962 explicit 'tsd' field in the referent of the tag pointer, and instead
0963b4bd 5963 the tsd pointer is stored just before the dispatch table. */
529cad9c
PH
5964
5965static int
5966ada_tag_name_2 (struct tag_args *args)
5967{
5968 struct type *info_type;
5969 static char name[1024];
5970 char *p;
5971 struct value *val, *valp;
5972
5973 args->name = NULL;
e802dbe0 5974 info_type = ada_get_tsd_type (current_inferior());
529cad9c
PH
5975 if (info_type == NULL)
5976 return 0;
5977 info_type = lookup_pointer_type (lookup_pointer_type (info_type));
5978 valp = value_cast (info_type, args->tag);
5979 if (valp == NULL)
5980 return 0;
2497b498 5981 val = value_ind (value_ptradd (valp, -1));
4c4b4cd2
PH
5982 if (val == NULL)
5983 return 0;
03ee6b2e 5984 val = ada_value_struct_elt (val, "expanded_name", 1);
4c4b4cd2
PH
5985 if (val == NULL)
5986 return 0;
5987 read_memory_string (value_as_address (val), name, sizeof (name) - 1);
5988 for (p = name; *p != '\0'; p += 1)
5989 if (isalpha (*p))
5990 *p = tolower (*p);
5991 args->name = name;
5992 return 0;
5993}
5994
5995/* The type name of the dynamic type denoted by the 'tag value TAG, as
e802dbe0 5996 a C string. */
4c4b4cd2
PH
5997
5998const char *
5999ada_tag_name (struct value *tag)
6000{
6001 struct tag_args args;
5b4ee69b 6002
df407dfe 6003 if (!ada_is_tag_type (value_type (tag)))
4c4b4cd2 6004 return NULL;
76a01679 6005 args.tag = tag;
4c4b4cd2
PH
6006 args.name = NULL;
6007 catch_errors (ada_tag_name_1, &args, NULL, RETURN_MASK_ALL);
6008 return args.name;
6009}
6010
6011/* The parent type of TYPE, or NULL if none. */
14f9c5c9 6012
d2e4a39e 6013struct type *
ebf56fd3 6014ada_parent_type (struct type *type)
14f9c5c9
AS
6015{
6016 int i;
6017
61ee279c 6018 type = ada_check_typedef (type);
14f9c5c9
AS
6019
6020 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_STRUCT)
6021 return NULL;
6022
6023 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
6024 if (ada_is_parent_field (type, i))
0c1f74cf
JB
6025 {
6026 struct type *parent_type = TYPE_FIELD_TYPE (type, i);
6027
6028 /* If the _parent field is a pointer, then dereference it. */
6029 if (TYPE_CODE (parent_type) == TYPE_CODE_PTR)
6030 parent_type = TYPE_TARGET_TYPE (parent_type);
6031 /* If there is a parallel XVS type, get the actual base type. */
6032 parent_type = ada_get_base_type (parent_type);
6033
6034 return ada_check_typedef (parent_type);
6035 }
14f9c5c9
AS
6036
6037 return NULL;
6038}
6039
4c4b4cd2
PH
6040/* True iff field number FIELD_NUM of structure type TYPE contains the
6041 parent-type (inherited) fields of a derived type. Assumes TYPE is
6042 a structure type with at least FIELD_NUM+1 fields. */
14f9c5c9
AS
6043
6044int
ebf56fd3 6045ada_is_parent_field (struct type *type, int field_num)
14f9c5c9 6046{
61ee279c 6047 const char *name = TYPE_FIELD_NAME (ada_check_typedef (type), field_num);
5b4ee69b 6048
4c4b4cd2
PH
6049 return (name != NULL
6050 && (strncmp (name, "PARENT", 6) == 0
6051 || strncmp (name, "_parent", 7) == 0));
14f9c5c9
AS
6052}
6053
4c4b4cd2 6054/* True iff field number FIELD_NUM of structure type TYPE is a
14f9c5c9 6055 transparent wrapper field (which should be silently traversed when doing
4c4b4cd2 6056 field selection and flattened when printing). Assumes TYPE is a
14f9c5c9 6057 structure type with at least FIELD_NUM+1 fields. Such fields are always
4c4b4cd2 6058 structures. */
14f9c5c9
AS
6059
6060int
ebf56fd3 6061ada_is_wrapper_field (struct type *type, int field_num)
14f9c5c9 6062{
d2e4a39e 6063 const char *name = TYPE_FIELD_NAME (type, field_num);
5b4ee69b 6064
d2e4a39e 6065 return (name != NULL
4c4b4cd2
PH
6066 && (strncmp (name, "PARENT", 6) == 0
6067 || strcmp (name, "REP") == 0
6068 || strncmp (name, "_parent", 7) == 0
6069 || name[0] == 'S' || name[0] == 'R' || name[0] == 'O'));
14f9c5c9
AS
6070}
6071
4c4b4cd2
PH
6072/* True iff field number FIELD_NUM of structure or union type TYPE
6073 is a variant wrapper. Assumes TYPE is a structure type with at least
6074 FIELD_NUM+1 fields. */
14f9c5c9
AS
6075
6076int
ebf56fd3 6077ada_is_variant_part (struct type *type, int field_num)
14f9c5c9 6078{
d2e4a39e 6079 struct type *field_type = TYPE_FIELD_TYPE (type, field_num);
5b4ee69b 6080
14f9c5c9 6081 return (TYPE_CODE (field_type) == TYPE_CODE_UNION
4c4b4cd2 6082 || (is_dynamic_field (type, field_num)
c3e5cd34
PH
6083 && (TYPE_CODE (TYPE_TARGET_TYPE (field_type))
6084 == TYPE_CODE_UNION)));
14f9c5c9
AS
6085}
6086
6087/* Assuming that VAR_TYPE is a variant wrapper (type of the variant part)
4c4b4cd2 6088 whose discriminants are contained in the record type OUTER_TYPE,
7c964f07
UW
6089 returns the type of the controlling discriminant for the variant.
6090 May return NULL if the type could not be found. */
14f9c5c9 6091
d2e4a39e 6092struct type *
ebf56fd3 6093ada_variant_discrim_type (struct type *var_type, struct type *outer_type)
14f9c5c9 6094{
d2e4a39e 6095 char *name = ada_variant_discrim_name (var_type);
5b4ee69b 6096
7c964f07 6097 return ada_lookup_struct_elt_type (outer_type, name, 1, 1, NULL);
14f9c5c9
AS
6098}
6099
4c4b4cd2 6100/* Assuming that TYPE is the type of a variant wrapper, and FIELD_NUM is a
14f9c5c9 6101 valid field number within it, returns 1 iff field FIELD_NUM of TYPE
4c4b4cd2 6102 represents a 'when others' clause; otherwise 0. */
14f9c5c9
AS
6103
6104int
ebf56fd3 6105ada_is_others_clause (struct type *type, int field_num)
14f9c5c9 6106{
d2e4a39e 6107 const char *name = TYPE_FIELD_NAME (type, field_num);
5b4ee69b 6108
14f9c5c9
AS
6109 return (name != NULL && name[0] == 'O');
6110}
6111
6112/* Assuming that TYPE0 is the type of the variant part of a record,
4c4b4cd2
PH
6113 returns the name of the discriminant controlling the variant.
6114 The value is valid until the next call to ada_variant_discrim_name. */
14f9c5c9 6115
d2e4a39e 6116char *
ebf56fd3 6117ada_variant_discrim_name (struct type *type0)
14f9c5c9 6118{
d2e4a39e 6119 static char *result = NULL;
14f9c5c9 6120 static size_t result_len = 0;
d2e4a39e
AS
6121 struct type *type;
6122 const char *name;
6123 const char *discrim_end;
6124 const char *discrim_start;
14f9c5c9
AS
6125
6126 if (TYPE_CODE (type0) == TYPE_CODE_PTR)
6127 type = TYPE_TARGET_TYPE (type0);
6128 else
6129 type = type0;
6130
6131 name = ada_type_name (type);
6132
6133 if (name == NULL || name[0] == '\000')
6134 return "";
6135
6136 for (discrim_end = name + strlen (name) - 6; discrim_end != name;
6137 discrim_end -= 1)
6138 {
4c4b4cd2
PH
6139 if (strncmp (discrim_end, "___XVN", 6) == 0)
6140 break;
14f9c5c9
AS
6141 }
6142 if (discrim_end == name)
6143 return "";
6144
d2e4a39e 6145 for (discrim_start = discrim_end; discrim_start != name + 3;
14f9c5c9
AS
6146 discrim_start -= 1)
6147 {
d2e4a39e 6148 if (discrim_start == name + 1)
4c4b4cd2 6149 return "";
76a01679 6150 if ((discrim_start > name + 3
4c4b4cd2
PH
6151 && strncmp (discrim_start - 3, "___", 3) == 0)
6152 || discrim_start[-1] == '.')
6153 break;
14f9c5c9
AS
6154 }
6155
6156 GROW_VECT (result, result_len, discrim_end - discrim_start + 1);
6157 strncpy (result, discrim_start, discrim_end - discrim_start);
d2e4a39e 6158 result[discrim_end - discrim_start] = '\0';
14f9c5c9
AS
6159 return result;
6160}
6161
4c4b4cd2
PH
6162/* Scan STR for a subtype-encoded number, beginning at position K.
6163 Put the position of the character just past the number scanned in
6164 *NEW_K, if NEW_K!=NULL. Put the scanned number in *R, if R!=NULL.
6165 Return 1 if there was a valid number at the given position, and 0
6166 otherwise. A "subtype-encoded" number consists of the absolute value
6167 in decimal, followed by the letter 'm' to indicate a negative number.
6168 Assumes 0m does not occur. */
14f9c5c9
AS
6169
6170int
d2e4a39e 6171ada_scan_number (const char str[], int k, LONGEST * R, int *new_k)
14f9c5c9
AS
6172{
6173 ULONGEST RU;
6174
d2e4a39e 6175 if (!isdigit (str[k]))
14f9c5c9
AS
6176 return 0;
6177
4c4b4cd2 6178 /* Do it the hard way so as not to make any assumption about
14f9c5c9 6179 the relationship of unsigned long (%lu scan format code) and
4c4b4cd2 6180 LONGEST. */
14f9c5c9
AS
6181 RU = 0;
6182 while (isdigit (str[k]))
6183 {
d2e4a39e 6184 RU = RU * 10 + (str[k] - '0');
14f9c5c9
AS
6185 k += 1;
6186 }
6187
d2e4a39e 6188 if (str[k] == 'm')
14f9c5c9
AS
6189 {
6190 if (R != NULL)
4c4b4cd2 6191 *R = (-(LONGEST) (RU - 1)) - 1;
14f9c5c9
AS
6192 k += 1;
6193 }
6194 else if (R != NULL)
6195 *R = (LONGEST) RU;
6196
4c4b4cd2 6197 /* NOTE on the above: Technically, C does not say what the results of
14f9c5c9
AS
6198 - (LONGEST) RU or (LONGEST) -RU are for RU == largest positive
6199 number representable as a LONGEST (although either would probably work
6200 in most implementations). When RU>0, the locution in the then branch
4c4b4cd2 6201 above is always equivalent to the negative of RU. */
14f9c5c9
AS
6202
6203 if (new_k != NULL)
6204 *new_k = k;
6205 return 1;
6206}
6207
4c4b4cd2
PH
6208/* Assuming that TYPE is a variant part wrapper type (a VARIANTS field),
6209 and FIELD_NUM is a valid field number within it, returns 1 iff VAL is
6210 in the range encoded by field FIELD_NUM of TYPE; otherwise 0. */
14f9c5c9 6211
d2e4a39e 6212int
ebf56fd3 6213ada_in_variant (LONGEST val, struct type *type, int field_num)
14f9c5c9 6214{
d2e4a39e 6215 const char *name = TYPE_FIELD_NAME (type, field_num);
14f9c5c9
AS
6216 int p;
6217
6218 p = 0;
6219 while (1)
6220 {
d2e4a39e 6221 switch (name[p])
4c4b4cd2
PH
6222 {
6223 case '\0':
6224 return 0;
6225 case 'S':
6226 {
6227 LONGEST W;
5b4ee69b 6228
4c4b4cd2
PH
6229 if (!ada_scan_number (name, p + 1, &W, &p))
6230 return 0;
6231 if (val == W)
6232 return 1;
6233 break;
6234 }
6235 case 'R':
6236 {
6237 LONGEST L, U;
5b4ee69b 6238
4c4b4cd2
PH
6239 if (!ada_scan_number (name, p + 1, &L, &p)
6240 || name[p] != 'T' || !ada_scan_number (name, p + 1, &U, &p))
6241 return 0;
6242 if (val >= L && val <= U)
6243 return 1;
6244 break;
6245 }
6246 case 'O':
6247 return 1;
6248 default:
6249 return 0;
6250 }
6251 }
6252}
6253
0963b4bd 6254/* FIXME: Lots of redundancy below. Try to consolidate. */
4c4b4cd2
PH
6255
6256/* Given a value ARG1 (offset by OFFSET bytes) of a struct or union type
6257 ARG_TYPE, extract and return the value of one of its (non-static)
6258 fields. FIELDNO says which field. Differs from value_primitive_field
6259 only in that it can handle packed values of arbitrary type. */
14f9c5c9 6260
4c4b4cd2 6261static struct value *
d2e4a39e 6262ada_value_primitive_field (struct value *arg1, int offset, int fieldno,
4c4b4cd2 6263 struct type *arg_type)
14f9c5c9 6264{
14f9c5c9
AS
6265 struct type *type;
6266
61ee279c 6267 arg_type = ada_check_typedef (arg_type);
14f9c5c9
AS
6268 type = TYPE_FIELD_TYPE (arg_type, fieldno);
6269
4c4b4cd2 6270 /* Handle packed fields. */
14f9c5c9
AS
6271
6272 if (TYPE_FIELD_BITSIZE (arg_type, fieldno) != 0)
6273 {
6274 int bit_pos = TYPE_FIELD_BITPOS (arg_type, fieldno);
6275 int bit_size = TYPE_FIELD_BITSIZE (arg_type, fieldno);
d2e4a39e 6276
0fd88904 6277 return ada_value_primitive_packed_val (arg1, value_contents (arg1),
4c4b4cd2
PH
6278 offset + bit_pos / 8,
6279 bit_pos % 8, bit_size, type);
14f9c5c9
AS
6280 }
6281 else
6282 return value_primitive_field (arg1, offset, fieldno, arg_type);
6283}
6284
52ce6436
PH
6285/* Find field with name NAME in object of type TYPE. If found,
6286 set the following for each argument that is non-null:
6287 - *FIELD_TYPE_P to the field's type;
6288 - *BYTE_OFFSET_P to OFFSET + the byte offset of the field within
6289 an object of that type;
6290 - *BIT_OFFSET_P to the bit offset modulo byte size of the field;
6291 - *BIT_SIZE_P to its size in bits if the field is packed, and
6292 0 otherwise;
6293 If INDEX_P is non-null, increment *INDEX_P by the number of source-visible
6294 fields up to but not including the desired field, or by the total
6295 number of fields if not found. A NULL value of NAME never
6296 matches; the function just counts visible fields in this case.
6297
0963b4bd 6298 Returns 1 if found, 0 otherwise. */
52ce6436 6299
4c4b4cd2 6300static int
76a01679
JB
6301find_struct_field (char *name, struct type *type, int offset,
6302 struct type **field_type_p,
52ce6436
PH
6303 int *byte_offset_p, int *bit_offset_p, int *bit_size_p,
6304 int *index_p)
4c4b4cd2
PH
6305{
6306 int i;
6307
61ee279c 6308 type = ada_check_typedef (type);
76a01679 6309
52ce6436
PH
6310 if (field_type_p != NULL)
6311 *field_type_p = NULL;
6312 if (byte_offset_p != NULL)
d5d6fca5 6313 *byte_offset_p = 0;
52ce6436
PH
6314 if (bit_offset_p != NULL)
6315 *bit_offset_p = 0;
6316 if (bit_size_p != NULL)
6317 *bit_size_p = 0;
6318
6319 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
4c4b4cd2
PH
6320 {
6321 int bit_pos = TYPE_FIELD_BITPOS (type, i);
6322 int fld_offset = offset + bit_pos / 8;
6323 char *t_field_name = TYPE_FIELD_NAME (type, i);
76a01679 6324
4c4b4cd2
PH
6325 if (t_field_name == NULL)
6326 continue;
6327
52ce6436 6328 else if (name != NULL && field_name_match (t_field_name, name))
76a01679
JB
6329 {
6330 int bit_size = TYPE_FIELD_BITSIZE (type, i);
5b4ee69b 6331
52ce6436
PH
6332 if (field_type_p != NULL)
6333 *field_type_p = TYPE_FIELD_TYPE (type, i);
6334 if (byte_offset_p != NULL)
6335 *byte_offset_p = fld_offset;
6336 if (bit_offset_p != NULL)
6337 *bit_offset_p = bit_pos % 8;
6338 if (bit_size_p != NULL)
6339 *bit_size_p = bit_size;
76a01679
JB
6340 return 1;
6341 }
4c4b4cd2
PH
6342 else if (ada_is_wrapper_field (type, i))
6343 {
52ce6436
PH
6344 if (find_struct_field (name, TYPE_FIELD_TYPE (type, i), fld_offset,
6345 field_type_p, byte_offset_p, bit_offset_p,
6346 bit_size_p, index_p))
76a01679
JB
6347 return 1;
6348 }
4c4b4cd2
PH
6349 else if (ada_is_variant_part (type, i))
6350 {
52ce6436
PH
6351 /* PNH: Wait. Do we ever execute this section, or is ARG always of
6352 fixed type?? */
4c4b4cd2 6353 int j;
52ce6436
PH
6354 struct type *field_type
6355 = ada_check_typedef (TYPE_FIELD_TYPE (type, i));
4c4b4cd2 6356
52ce6436 6357 for (j = 0; j < TYPE_NFIELDS (field_type); j += 1)
4c4b4cd2 6358 {
76a01679
JB
6359 if (find_struct_field (name, TYPE_FIELD_TYPE (field_type, j),
6360 fld_offset
6361 + TYPE_FIELD_BITPOS (field_type, j) / 8,
6362 field_type_p, byte_offset_p,
52ce6436 6363 bit_offset_p, bit_size_p, index_p))
76a01679 6364 return 1;
4c4b4cd2
PH
6365 }
6366 }
52ce6436
PH
6367 else if (index_p != NULL)
6368 *index_p += 1;
4c4b4cd2
PH
6369 }
6370 return 0;
6371}
6372
0963b4bd 6373/* Number of user-visible fields in record type TYPE. */
4c4b4cd2 6374
52ce6436
PH
6375static int
6376num_visible_fields (struct type *type)
6377{
6378 int n;
5b4ee69b 6379
52ce6436
PH
6380 n = 0;
6381 find_struct_field (NULL, type, 0, NULL, NULL, NULL, NULL, &n);
6382 return n;
6383}
14f9c5c9 6384
4c4b4cd2 6385/* Look for a field NAME in ARG. Adjust the address of ARG by OFFSET bytes,
14f9c5c9
AS
6386 and search in it assuming it has (class) type TYPE.
6387 If found, return value, else return NULL.
6388
4c4b4cd2 6389 Searches recursively through wrapper fields (e.g., '_parent'). */
14f9c5c9 6390
4c4b4cd2 6391static struct value *
d2e4a39e 6392ada_search_struct_field (char *name, struct value *arg, int offset,
4c4b4cd2 6393 struct type *type)
14f9c5c9
AS
6394{
6395 int i;
14f9c5c9 6396
5b4ee69b 6397 type = ada_check_typedef (type);
52ce6436 6398 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
14f9c5c9
AS
6399 {
6400 char *t_field_name = TYPE_FIELD_NAME (type, i);
6401
6402 if (t_field_name == NULL)
4c4b4cd2 6403 continue;
14f9c5c9
AS
6404
6405 else if (field_name_match (t_field_name, name))
4c4b4cd2 6406 return ada_value_primitive_field (arg, offset, i, type);
14f9c5c9
AS
6407
6408 else if (ada_is_wrapper_field (type, i))
4c4b4cd2 6409 {
0963b4bd 6410 struct value *v = /* Do not let indent join lines here. */
06d5cf63
JB
6411 ada_search_struct_field (name, arg,
6412 offset + TYPE_FIELD_BITPOS (type, i) / 8,
6413 TYPE_FIELD_TYPE (type, i));
5b4ee69b 6414
4c4b4cd2
PH
6415 if (v != NULL)
6416 return v;
6417 }
14f9c5c9
AS
6418
6419 else if (ada_is_variant_part (type, i))
4c4b4cd2 6420 {
0963b4bd 6421 /* PNH: Do we ever get here? See find_struct_field. */
4c4b4cd2 6422 int j;
5b4ee69b
MS
6423 struct type *field_type = ada_check_typedef (TYPE_FIELD_TYPE (type,
6424 i));
4c4b4cd2
PH
6425 int var_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8;
6426
52ce6436 6427 for (j = 0; j < TYPE_NFIELDS (field_type); j += 1)
4c4b4cd2 6428 {
0963b4bd
MS
6429 struct value *v = ada_search_struct_field /* Force line
6430 break. */
06d5cf63
JB
6431 (name, arg,
6432 var_offset + TYPE_FIELD_BITPOS (field_type, j) / 8,
6433 TYPE_FIELD_TYPE (field_type, j));
5b4ee69b 6434
4c4b4cd2
PH
6435 if (v != NULL)
6436 return v;
6437 }
6438 }
14f9c5c9
AS
6439 }
6440 return NULL;
6441}
d2e4a39e 6442
52ce6436
PH
6443static struct value *ada_index_struct_field_1 (int *, struct value *,
6444 int, struct type *);
6445
6446
6447/* Return field #INDEX in ARG, where the index is that returned by
6448 * find_struct_field through its INDEX_P argument. Adjust the address
6449 * of ARG by OFFSET bytes, and search in it assuming it has (class) type TYPE.
0963b4bd 6450 * If found, return value, else return NULL. */
52ce6436
PH
6451
6452static struct value *
6453ada_index_struct_field (int index, struct value *arg, int offset,
6454 struct type *type)
6455{
6456 return ada_index_struct_field_1 (&index, arg, offset, type);
6457}
6458
6459
6460/* Auxiliary function for ada_index_struct_field. Like
6461 * ada_index_struct_field, but takes index from *INDEX_P and modifies
0963b4bd 6462 * *INDEX_P. */
52ce6436
PH
6463
6464static struct value *
6465ada_index_struct_field_1 (int *index_p, struct value *arg, int offset,
6466 struct type *type)
6467{
6468 int i;
6469 type = ada_check_typedef (type);
6470
6471 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
6472 {
6473 if (TYPE_FIELD_NAME (type, i) == NULL)
6474 continue;
6475 else if (ada_is_wrapper_field (type, i))
6476 {
0963b4bd 6477 struct value *v = /* Do not let indent join lines here. */
52ce6436
PH
6478 ada_index_struct_field_1 (index_p, arg,
6479 offset + TYPE_FIELD_BITPOS (type, i) / 8,
6480 TYPE_FIELD_TYPE (type, i));
5b4ee69b 6481
52ce6436
PH
6482 if (v != NULL)
6483 return v;
6484 }
6485
6486 else if (ada_is_variant_part (type, i))
6487 {
6488 /* PNH: Do we ever get here? See ada_search_struct_field,
0963b4bd 6489 find_struct_field. */
52ce6436
PH
6490 error (_("Cannot assign this kind of variant record"));
6491 }
6492 else if (*index_p == 0)
6493 return ada_value_primitive_field (arg, offset, i, type);
6494 else
6495 *index_p -= 1;
6496 }
6497 return NULL;
6498}
6499
4c4b4cd2
PH
6500/* Given ARG, a value of type (pointer or reference to a)*
6501 structure/union, extract the component named NAME from the ultimate
6502 target structure/union and return it as a value with its
f5938064 6503 appropriate type.
14f9c5c9 6504
4c4b4cd2
PH
6505 The routine searches for NAME among all members of the structure itself
6506 and (recursively) among all members of any wrapper members
14f9c5c9
AS
6507 (e.g., '_parent').
6508
03ee6b2e
PH
6509 If NO_ERR, then simply return NULL in case of error, rather than
6510 calling error. */
14f9c5c9 6511
d2e4a39e 6512struct value *
03ee6b2e 6513ada_value_struct_elt (struct value *arg, char *name, int no_err)
14f9c5c9 6514{
4c4b4cd2 6515 struct type *t, *t1;
d2e4a39e 6516 struct value *v;
14f9c5c9 6517
4c4b4cd2 6518 v = NULL;
df407dfe 6519 t1 = t = ada_check_typedef (value_type (arg));
4c4b4cd2
PH
6520 if (TYPE_CODE (t) == TYPE_CODE_REF)
6521 {
6522 t1 = TYPE_TARGET_TYPE (t);
6523 if (t1 == NULL)
03ee6b2e 6524 goto BadValue;
61ee279c 6525 t1 = ada_check_typedef (t1);
4c4b4cd2 6526 if (TYPE_CODE (t1) == TYPE_CODE_PTR)
76a01679 6527 {
994b9211 6528 arg = coerce_ref (arg);
76a01679
JB
6529 t = t1;
6530 }
4c4b4cd2 6531 }
14f9c5c9 6532
4c4b4cd2
PH
6533 while (TYPE_CODE (t) == TYPE_CODE_PTR)
6534 {
6535 t1 = TYPE_TARGET_TYPE (t);
6536 if (t1 == NULL)
03ee6b2e 6537 goto BadValue;
61ee279c 6538 t1 = ada_check_typedef (t1);
4c4b4cd2 6539 if (TYPE_CODE (t1) == TYPE_CODE_PTR)
76a01679
JB
6540 {
6541 arg = value_ind (arg);
6542 t = t1;
6543 }
4c4b4cd2 6544 else
76a01679 6545 break;
4c4b4cd2 6546 }
14f9c5c9 6547
4c4b4cd2 6548 if (TYPE_CODE (t1) != TYPE_CODE_STRUCT && TYPE_CODE (t1) != TYPE_CODE_UNION)
03ee6b2e 6549 goto BadValue;
14f9c5c9 6550
4c4b4cd2
PH
6551 if (t1 == t)
6552 v = ada_search_struct_field (name, arg, 0, t);
6553 else
6554 {
6555 int bit_offset, bit_size, byte_offset;
6556 struct type *field_type;
6557 CORE_ADDR address;
6558
76a01679
JB
6559 if (TYPE_CODE (t) == TYPE_CODE_PTR)
6560 address = value_as_address (arg);
4c4b4cd2 6561 else
0fd88904 6562 address = unpack_pointer (t, value_contents (arg));
14f9c5c9 6563
1ed6ede0 6564 t1 = ada_to_fixed_type (ada_get_base_type (t1), NULL, address, NULL, 1);
76a01679
JB
6565 if (find_struct_field (name, t1, 0,
6566 &field_type, &byte_offset, &bit_offset,
52ce6436 6567 &bit_size, NULL))
76a01679
JB
6568 {
6569 if (bit_size != 0)
6570 {
714e53ab
PH
6571 if (TYPE_CODE (t) == TYPE_CODE_REF)
6572 arg = ada_coerce_ref (arg);
6573 else
6574 arg = ada_value_ind (arg);
76a01679
JB
6575 v = ada_value_primitive_packed_val (arg, NULL, byte_offset,
6576 bit_offset, bit_size,
6577 field_type);
6578 }
6579 else
f5938064 6580 v = value_at_lazy (field_type, address + byte_offset);
76a01679
JB
6581 }
6582 }
6583
03ee6b2e
PH
6584 if (v != NULL || no_err)
6585 return v;
6586 else
323e0a4a 6587 error (_("There is no member named %s."), name);
14f9c5c9 6588
03ee6b2e
PH
6589 BadValue:
6590 if (no_err)
6591 return NULL;
6592 else
0963b4bd
MS
6593 error (_("Attempt to extract a component of "
6594 "a value that is not a record."));
14f9c5c9
AS
6595}
6596
6597/* Given a type TYPE, look up the type of the component of type named NAME.
4c4b4cd2
PH
6598 If DISPP is non-null, add its byte displacement from the beginning of a
6599 structure (pointed to by a value) of type TYPE to *DISPP (does not
14f9c5c9
AS
6600 work for packed fields).
6601
6602 Matches any field whose name has NAME as a prefix, possibly
4c4b4cd2 6603 followed by "___".
14f9c5c9 6604
0963b4bd 6605 TYPE can be either a struct or union. If REFOK, TYPE may also
4c4b4cd2
PH
6606 be a (pointer or reference)+ to a struct or union, and the
6607 ultimate target type will be searched.
14f9c5c9
AS
6608
6609 Looks recursively into variant clauses and parent types.
6610
4c4b4cd2
PH
6611 If NOERR is nonzero, return NULL if NAME is not suitably defined or
6612 TYPE is not a type of the right kind. */
14f9c5c9 6613
4c4b4cd2 6614static struct type *
76a01679
JB
6615ada_lookup_struct_elt_type (struct type *type, char *name, int refok,
6616 int noerr, int *dispp)
14f9c5c9
AS
6617{
6618 int i;
6619
6620 if (name == NULL)
6621 goto BadName;
6622
76a01679 6623 if (refok && type != NULL)
4c4b4cd2
PH
6624 while (1)
6625 {
61ee279c 6626 type = ada_check_typedef (type);
76a01679
JB
6627 if (TYPE_CODE (type) != TYPE_CODE_PTR
6628 && TYPE_CODE (type) != TYPE_CODE_REF)
6629 break;
6630 type = TYPE_TARGET_TYPE (type);
4c4b4cd2 6631 }
14f9c5c9 6632
76a01679 6633 if (type == NULL
1265e4aa
JB
6634 || (TYPE_CODE (type) != TYPE_CODE_STRUCT
6635 && TYPE_CODE (type) != TYPE_CODE_UNION))
14f9c5c9 6636 {
4c4b4cd2 6637 if (noerr)
76a01679 6638 return NULL;
4c4b4cd2 6639 else
76a01679
JB
6640 {
6641 target_terminal_ours ();
6642 gdb_flush (gdb_stdout);
323e0a4a
AC
6643 if (type == NULL)
6644 error (_("Type (null) is not a structure or union type"));
6645 else
6646 {
6647 /* XXX: type_sprint */
6648 fprintf_unfiltered (gdb_stderr, _("Type "));
6649 type_print (type, "", gdb_stderr, -1);
6650 error (_(" is not a structure or union type"));
6651 }
76a01679 6652 }
14f9c5c9
AS
6653 }
6654
6655 type = to_static_fixed_type (type);
6656
6657 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
6658 {
6659 char *t_field_name = TYPE_FIELD_NAME (type, i);
6660 struct type *t;
6661 int disp;
d2e4a39e 6662
14f9c5c9 6663 if (t_field_name == NULL)
4c4b4cd2 6664 continue;
14f9c5c9
AS
6665
6666 else if (field_name_match (t_field_name, name))
4c4b4cd2
PH
6667 {
6668 if (dispp != NULL)
6669 *dispp += TYPE_FIELD_BITPOS (type, i) / 8;
61ee279c 6670 return ada_check_typedef (TYPE_FIELD_TYPE (type, i));
4c4b4cd2 6671 }
14f9c5c9
AS
6672
6673 else if (ada_is_wrapper_field (type, i))
4c4b4cd2
PH
6674 {
6675 disp = 0;
6676 t = ada_lookup_struct_elt_type (TYPE_FIELD_TYPE (type, i), name,
6677 0, 1, &disp);
6678 if (t != NULL)
6679 {
6680 if (dispp != NULL)
6681 *dispp += disp + TYPE_FIELD_BITPOS (type, i) / 8;
6682 return t;
6683 }
6684 }
14f9c5c9
AS
6685
6686 else if (ada_is_variant_part (type, i))
4c4b4cd2
PH
6687 {
6688 int j;
5b4ee69b
MS
6689 struct type *field_type = ada_check_typedef (TYPE_FIELD_TYPE (type,
6690 i));
4c4b4cd2
PH
6691
6692 for (j = TYPE_NFIELDS (field_type) - 1; j >= 0; j -= 1)
6693 {
b1f33ddd
JB
6694 /* FIXME pnh 2008/01/26: We check for a field that is
6695 NOT wrapped in a struct, since the compiler sometimes
6696 generates these for unchecked variant types. Revisit
0963b4bd 6697 if the compiler changes this practice. */
b1f33ddd 6698 char *v_field_name = TYPE_FIELD_NAME (field_type, j);
4c4b4cd2 6699 disp = 0;
b1f33ddd
JB
6700 if (v_field_name != NULL
6701 && field_name_match (v_field_name, name))
6702 t = ada_check_typedef (TYPE_FIELD_TYPE (field_type, j));
6703 else
0963b4bd
MS
6704 t = ada_lookup_struct_elt_type (TYPE_FIELD_TYPE (field_type,
6705 j),
b1f33ddd
JB
6706 name, 0, 1, &disp);
6707
4c4b4cd2
PH
6708 if (t != NULL)
6709 {
6710 if (dispp != NULL)
6711 *dispp += disp + TYPE_FIELD_BITPOS (type, i) / 8;
6712 return t;
6713 }
6714 }
6715 }
14f9c5c9
AS
6716
6717 }
6718
6719BadName:
d2e4a39e 6720 if (!noerr)
14f9c5c9
AS
6721 {
6722 target_terminal_ours ();
6723 gdb_flush (gdb_stdout);
323e0a4a
AC
6724 if (name == NULL)
6725 {
6726 /* XXX: type_sprint */
6727 fprintf_unfiltered (gdb_stderr, _("Type "));
6728 type_print (type, "", gdb_stderr, -1);
6729 error (_(" has no component named <null>"));
6730 }
6731 else
6732 {
6733 /* XXX: type_sprint */
6734 fprintf_unfiltered (gdb_stderr, _("Type "));
6735 type_print (type, "", gdb_stderr, -1);
6736 error (_(" has no component named %s"), name);
6737 }
14f9c5c9
AS
6738 }
6739
6740 return NULL;
6741}
6742
b1f33ddd
JB
6743/* Assuming that VAR_TYPE is the type of a variant part of a record (a union),
6744 within a value of type OUTER_TYPE, return true iff VAR_TYPE
6745 represents an unchecked union (that is, the variant part of a
0963b4bd 6746 record that is named in an Unchecked_Union pragma). */
b1f33ddd
JB
6747
6748static int
6749is_unchecked_variant (struct type *var_type, struct type *outer_type)
6750{
6751 char *discrim_name = ada_variant_discrim_name (var_type);
5b4ee69b 6752
b1f33ddd
JB
6753 return (ada_lookup_struct_elt_type (outer_type, discrim_name, 0, 1, NULL)
6754 == NULL);
6755}
6756
6757
14f9c5c9
AS
6758/* Assuming that VAR_TYPE is the type of a variant part of a record (a union),
6759 within a value of type OUTER_TYPE that is stored in GDB at
4c4b4cd2
PH
6760 OUTER_VALADDR, determine which variant clause (field number in VAR_TYPE,
6761 numbering from 0) is applicable. Returns -1 if none are. */
14f9c5c9 6762
d2e4a39e 6763int
ebf56fd3 6764ada_which_variant_applies (struct type *var_type, struct type *outer_type,
fc1a4b47 6765 const gdb_byte *outer_valaddr)
14f9c5c9
AS
6766{
6767 int others_clause;
6768 int i;
d2e4a39e 6769 char *discrim_name = ada_variant_discrim_name (var_type);
0c281816
JB
6770 struct value *outer;
6771 struct value *discrim;
14f9c5c9
AS
6772 LONGEST discrim_val;
6773
0c281816
JB
6774 outer = value_from_contents_and_address (outer_type, outer_valaddr, 0);
6775 discrim = ada_value_struct_elt (outer, discrim_name, 1);
6776 if (discrim == NULL)
14f9c5c9 6777 return -1;
0c281816 6778 discrim_val = value_as_long (discrim);
14f9c5c9
AS
6779
6780 others_clause = -1;
6781 for (i = 0; i < TYPE_NFIELDS (var_type); i += 1)
6782 {
6783 if (ada_is_others_clause (var_type, i))
4c4b4cd2 6784 others_clause = i;
14f9c5c9 6785 else if (ada_in_variant (discrim_val, var_type, i))
4c4b4cd2 6786 return i;
14f9c5c9
AS
6787 }
6788
6789 return others_clause;
6790}
d2e4a39e 6791\f
14f9c5c9
AS
6792
6793
4c4b4cd2 6794 /* Dynamic-Sized Records */
14f9c5c9
AS
6795
6796/* Strategy: The type ostensibly attached to a value with dynamic size
6797 (i.e., a size that is not statically recorded in the debugging
6798 data) does not accurately reflect the size or layout of the value.
6799 Our strategy is to convert these values to values with accurate,
4c4b4cd2 6800 conventional types that are constructed on the fly. */
14f9c5c9
AS
6801
6802/* There is a subtle and tricky problem here. In general, we cannot
6803 determine the size of dynamic records without its data. However,
6804 the 'struct value' data structure, which GDB uses to represent
6805 quantities in the inferior process (the target), requires the size
6806 of the type at the time of its allocation in order to reserve space
6807 for GDB's internal copy of the data. That's why the
6808 'to_fixed_xxx_type' routines take (target) addresses as parameters,
4c4b4cd2 6809 rather than struct value*s.
14f9c5c9
AS
6810
6811 However, GDB's internal history variables ($1, $2, etc.) are
6812 struct value*s containing internal copies of the data that are not, in
6813 general, the same as the data at their corresponding addresses in
6814 the target. Fortunately, the types we give to these values are all
6815 conventional, fixed-size types (as per the strategy described
6816 above), so that we don't usually have to perform the
6817 'to_fixed_xxx_type' conversions to look at their values.
6818 Unfortunately, there is one exception: if one of the internal
6819 history variables is an array whose elements are unconstrained
6820 records, then we will need to create distinct fixed types for each
6821 element selected. */
6822
6823/* The upshot of all of this is that many routines take a (type, host
6824 address, target address) triple as arguments to represent a value.
6825 The host address, if non-null, is supposed to contain an internal
6826 copy of the relevant data; otherwise, the program is to consult the
4c4b4cd2 6827 target at the target address. */
14f9c5c9
AS
6828
6829/* Assuming that VAL0 represents a pointer value, the result of
6830 dereferencing it. Differs from value_ind in its treatment of
4c4b4cd2 6831 dynamic-sized types. */
14f9c5c9 6832
d2e4a39e
AS
6833struct value *
6834ada_value_ind (struct value *val0)
14f9c5c9 6835{
d2e4a39e 6836 struct value *val = unwrap_value (value_ind (val0));
5b4ee69b 6837
4c4b4cd2 6838 return ada_to_fixed_value (val);
14f9c5c9
AS
6839}
6840
6841/* The value resulting from dereferencing any "reference to"
4c4b4cd2
PH
6842 qualifiers on VAL0. */
6843
d2e4a39e
AS
6844static struct value *
6845ada_coerce_ref (struct value *val0)
6846{
df407dfe 6847 if (TYPE_CODE (value_type (val0)) == TYPE_CODE_REF)
d2e4a39e
AS
6848 {
6849 struct value *val = val0;
5b4ee69b 6850
994b9211 6851 val = coerce_ref (val);
d2e4a39e 6852 val = unwrap_value (val);
4c4b4cd2 6853 return ada_to_fixed_value (val);
d2e4a39e
AS
6854 }
6855 else
14f9c5c9
AS
6856 return val0;
6857}
6858
6859/* Return OFF rounded upward if necessary to a multiple of
4c4b4cd2 6860 ALIGNMENT (a power of 2). */
14f9c5c9
AS
6861
6862static unsigned int
ebf56fd3 6863align_value (unsigned int off, unsigned int alignment)
14f9c5c9
AS
6864{
6865 return (off + alignment - 1) & ~(alignment - 1);
6866}
6867
4c4b4cd2 6868/* Return the bit alignment required for field #F of template type TYPE. */
14f9c5c9
AS
6869
6870static unsigned int
ebf56fd3 6871field_alignment (struct type *type, int f)
14f9c5c9 6872{
d2e4a39e 6873 const char *name = TYPE_FIELD_NAME (type, f);
64a1bf19 6874 int len;
14f9c5c9
AS
6875 int align_offset;
6876
64a1bf19
JB
6877 /* The field name should never be null, unless the debugging information
6878 is somehow malformed. In this case, we assume the field does not
6879 require any alignment. */
6880 if (name == NULL)
6881 return 1;
6882
6883 len = strlen (name);
6884
4c4b4cd2
PH
6885 if (!isdigit (name[len - 1]))
6886 return 1;
14f9c5c9 6887
d2e4a39e 6888 if (isdigit (name[len - 2]))
14f9c5c9
AS
6889 align_offset = len - 2;
6890 else
6891 align_offset = len - 1;
6892
4c4b4cd2 6893 if (align_offset < 7 || strncmp ("___XV", name + align_offset - 6, 5) != 0)
14f9c5c9
AS
6894 return TARGET_CHAR_BIT;
6895
4c4b4cd2
PH
6896 return atoi (name + align_offset) * TARGET_CHAR_BIT;
6897}
6898
6899/* Find a symbol named NAME. Ignores ambiguity. */
6900
6901struct symbol *
6902ada_find_any_symbol (const char *name)
6903{
6904 struct symbol *sym;
6905
6906 sym = standard_lookup (name, get_selected_block (NULL), VAR_DOMAIN);
6907 if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
6908 return sym;
6909
6910 sym = standard_lookup (name, NULL, STRUCT_DOMAIN);
6911 return sym;
14f9c5c9
AS
6912}
6913
dddfab26
UW
6914/* Find a type named NAME. Ignores ambiguity. This routine will look
6915 solely for types defined by debug info, it will not search the GDB
6916 primitive types. */
4c4b4cd2 6917
d2e4a39e 6918struct type *
ebf56fd3 6919ada_find_any_type (const char *name)
14f9c5c9 6920{
4c4b4cd2 6921 struct symbol *sym = ada_find_any_symbol (name);
14f9c5c9 6922
14f9c5c9 6923 if (sym != NULL)
dddfab26 6924 return SYMBOL_TYPE (sym);
14f9c5c9 6925
dddfab26 6926 return NULL;
14f9c5c9
AS
6927}
6928
aeb5907d
JB
6929/* Given NAME and an associated BLOCK, search all symbols for
6930 NAME suffixed with "___XR", which is the ``renaming'' symbol
4c4b4cd2
PH
6931 associated to NAME. Return this symbol if found, return
6932 NULL otherwise. */
6933
6934struct symbol *
6935ada_find_renaming_symbol (const char *name, struct block *block)
aeb5907d
JB
6936{
6937 struct symbol *sym;
6938
6939 sym = find_old_style_renaming_symbol (name, block);
6940
6941 if (sym != NULL)
6942 return sym;
6943
0963b4bd 6944 /* Not right yet. FIXME pnh 7/20/2007. */
aeb5907d
JB
6945 sym = ada_find_any_symbol (name);
6946 if (sym != NULL && strstr (SYMBOL_LINKAGE_NAME (sym), "___XR") != NULL)
6947 return sym;
6948 else
6949 return NULL;
6950}
6951
6952static struct symbol *
6953find_old_style_renaming_symbol (const char *name, struct block *block)
4c4b4cd2 6954{
7f0df278 6955 const struct symbol *function_sym = block_linkage_function (block);
4c4b4cd2
PH
6956 char *rename;
6957
6958 if (function_sym != NULL)
6959 {
6960 /* If the symbol is defined inside a function, NAME is not fully
6961 qualified. This means we need to prepend the function name
6962 as well as adding the ``___XR'' suffix to build the name of
6963 the associated renaming symbol. */
6964 char *function_name = SYMBOL_LINKAGE_NAME (function_sym);
529cad9c
PH
6965 /* Function names sometimes contain suffixes used
6966 for instance to qualify nested subprograms. When building
6967 the XR type name, we need to make sure that this suffix is
6968 not included. So do not include any suffix in the function
6969 name length below. */
69fadcdf 6970 int function_name_len = ada_name_prefix_len (function_name);
76a01679
JB
6971 const int rename_len = function_name_len + 2 /* "__" */
6972 + strlen (name) + 6 /* "___XR\0" */ ;
4c4b4cd2 6973
529cad9c 6974 /* Strip the suffix if necessary. */
69fadcdf
JB
6975 ada_remove_trailing_digits (function_name, &function_name_len);
6976 ada_remove_po_subprogram_suffix (function_name, &function_name_len);
6977 ada_remove_Xbn_suffix (function_name, &function_name_len);
529cad9c 6978
4c4b4cd2
PH
6979 /* Library-level functions are a special case, as GNAT adds
6980 a ``_ada_'' prefix to the function name to avoid namespace
aeb5907d 6981 pollution. However, the renaming symbols themselves do not
4c4b4cd2
PH
6982 have this prefix, so we need to skip this prefix if present. */
6983 if (function_name_len > 5 /* "_ada_" */
6984 && strstr (function_name, "_ada_") == function_name)
69fadcdf
JB
6985 {
6986 function_name += 5;
6987 function_name_len -= 5;
6988 }
4c4b4cd2
PH
6989
6990 rename = (char *) alloca (rename_len * sizeof (char));
69fadcdf
JB
6991 strncpy (rename, function_name, function_name_len);
6992 xsnprintf (rename + function_name_len, rename_len - function_name_len,
6993 "__%s___XR", name);
4c4b4cd2
PH
6994 }
6995 else
6996 {
6997 const int rename_len = strlen (name) + 6;
5b4ee69b 6998
4c4b4cd2 6999 rename = (char *) alloca (rename_len * sizeof (char));
88c15c34 7000 xsnprintf (rename, rename_len * sizeof (char), "%s___XR", name);
4c4b4cd2
PH
7001 }
7002
7003 return ada_find_any_symbol (rename);
7004}
7005
14f9c5c9 7006/* Because of GNAT encoding conventions, several GDB symbols may match a
4c4b4cd2 7007 given type name. If the type denoted by TYPE0 is to be preferred to
14f9c5c9 7008 that of TYPE1 for purposes of type printing, return non-zero;
4c4b4cd2
PH
7009 otherwise return 0. */
7010
14f9c5c9 7011int
d2e4a39e 7012ada_prefer_type (struct type *type0, struct type *type1)
14f9c5c9
AS
7013{
7014 if (type1 == NULL)
7015 return 1;
7016 else if (type0 == NULL)
7017 return 0;
7018 else if (TYPE_CODE (type1) == TYPE_CODE_VOID)
7019 return 1;
7020 else if (TYPE_CODE (type0) == TYPE_CODE_VOID)
7021 return 0;
4c4b4cd2
PH
7022 else if (TYPE_NAME (type1) == NULL && TYPE_NAME (type0) != NULL)
7023 return 1;
ad82864c 7024 else if (ada_is_constrained_packed_array_type (type0))
14f9c5c9 7025 return 1;
4c4b4cd2
PH
7026 else if (ada_is_array_descriptor_type (type0)
7027 && !ada_is_array_descriptor_type (type1))
14f9c5c9 7028 return 1;
aeb5907d
JB
7029 else
7030 {
7031 const char *type0_name = type_name_no_tag (type0);
7032 const char *type1_name = type_name_no_tag (type1);
7033
7034 if (type0_name != NULL && strstr (type0_name, "___XR") != NULL
7035 && (type1_name == NULL || strstr (type1_name, "___XR") == NULL))
7036 return 1;
7037 }
14f9c5c9
AS
7038 return 0;
7039}
7040
7041/* The name of TYPE, which is either its TYPE_NAME, or, if that is
4c4b4cd2
PH
7042 null, its TYPE_TAG_NAME. Null if TYPE is null. */
7043
d2e4a39e
AS
7044char *
7045ada_type_name (struct type *type)
14f9c5c9 7046{
d2e4a39e 7047 if (type == NULL)
14f9c5c9
AS
7048 return NULL;
7049 else if (TYPE_NAME (type) != NULL)
7050 return TYPE_NAME (type);
7051 else
7052 return TYPE_TAG_NAME (type);
7053}
7054
b4ba55a1
JB
7055/* Search the list of "descriptive" types associated to TYPE for a type
7056 whose name is NAME. */
7057
7058static struct type *
7059find_parallel_type_by_descriptive_type (struct type *type, const char *name)
7060{
7061 struct type *result;
7062
7063 /* If there no descriptive-type info, then there is no parallel type
7064 to be found. */
7065 if (!HAVE_GNAT_AUX_INFO (type))
7066 return NULL;
7067
7068 result = TYPE_DESCRIPTIVE_TYPE (type);
7069 while (result != NULL)
7070 {
7071 char *result_name = ada_type_name (result);
7072
7073 if (result_name == NULL)
7074 {
7075 warning (_("unexpected null name on descriptive type"));
7076 return NULL;
7077 }
7078
7079 /* If the names match, stop. */
7080 if (strcmp (result_name, name) == 0)
7081 break;
7082
7083 /* Otherwise, look at the next item on the list, if any. */
7084 if (HAVE_GNAT_AUX_INFO (result))
7085 result = TYPE_DESCRIPTIVE_TYPE (result);
7086 else
7087 result = NULL;
7088 }
7089
7090 /* If we didn't find a match, see whether this is a packed array. With
7091 older compilers, the descriptive type information is either absent or
7092 irrelevant when it comes to packed arrays so the above lookup fails.
7093 Fall back to using a parallel lookup by name in this case. */
12ab9e09 7094 if (result == NULL && ada_is_constrained_packed_array_type (type))
b4ba55a1
JB
7095 return ada_find_any_type (name);
7096
7097 return result;
7098}
7099
7100/* Find a parallel type to TYPE with the specified NAME, using the
7101 descriptive type taken from the debugging information, if available,
7102 and otherwise using the (slower) name-based method. */
7103
7104static struct type *
7105ada_find_parallel_type_with_name (struct type *type, const char *name)
7106{
7107 struct type *result = NULL;
7108
7109 if (HAVE_GNAT_AUX_INFO (type))
7110 result = find_parallel_type_by_descriptive_type (type, name);
7111 else
7112 result = ada_find_any_type (name);
7113
7114 return result;
7115}
7116
7117/* Same as above, but specify the name of the parallel type by appending
4c4b4cd2 7118 SUFFIX to the name of TYPE. */
14f9c5c9 7119
d2e4a39e 7120struct type *
ebf56fd3 7121ada_find_parallel_type (struct type *type, const char *suffix)
14f9c5c9 7122{
b4ba55a1 7123 char *name, *typename = ada_type_name (type);
14f9c5c9 7124 int len;
d2e4a39e 7125
14f9c5c9
AS
7126 if (typename == NULL)
7127 return NULL;
7128
7129 len = strlen (typename);
7130
b4ba55a1 7131 name = (char *) alloca (len + strlen (suffix) + 1);
14f9c5c9
AS
7132
7133 strcpy (name, typename);
7134 strcpy (name + len, suffix);
7135
b4ba55a1 7136 return ada_find_parallel_type_with_name (type, name);
14f9c5c9
AS
7137}
7138
14f9c5c9 7139/* If TYPE is a variable-size record type, return the corresponding template
4c4b4cd2 7140 type describing its fields. Otherwise, return NULL. */
14f9c5c9 7141
d2e4a39e
AS
7142static struct type *
7143dynamic_template_type (struct type *type)
14f9c5c9 7144{
61ee279c 7145 type = ada_check_typedef (type);
14f9c5c9
AS
7146
7147 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_STRUCT
d2e4a39e 7148 || ada_type_name (type) == NULL)
14f9c5c9 7149 return NULL;
d2e4a39e 7150 else
14f9c5c9
AS
7151 {
7152 int len = strlen (ada_type_name (type));
5b4ee69b 7153
4c4b4cd2
PH
7154 if (len > 6 && strcmp (ada_type_name (type) + len - 6, "___XVE") == 0)
7155 return type;
14f9c5c9 7156 else
4c4b4cd2 7157 return ada_find_parallel_type (type, "___XVE");
14f9c5c9
AS
7158 }
7159}
7160
7161/* Assuming that TEMPL_TYPE is a union or struct type, returns
4c4b4cd2 7162 non-zero iff field FIELD_NUM of TEMPL_TYPE has dynamic size. */
14f9c5c9 7163
d2e4a39e
AS
7164static int
7165is_dynamic_field (struct type *templ_type, int field_num)
14f9c5c9
AS
7166{
7167 const char *name = TYPE_FIELD_NAME (templ_type, field_num);
5b4ee69b 7168
d2e4a39e 7169 return name != NULL
14f9c5c9
AS
7170 && TYPE_CODE (TYPE_FIELD_TYPE (templ_type, field_num)) == TYPE_CODE_PTR
7171 && strstr (name, "___XVL") != NULL;
7172}
7173
4c4b4cd2
PH
7174/* The index of the variant field of TYPE, or -1 if TYPE does not
7175 represent a variant record type. */
14f9c5c9 7176
d2e4a39e 7177static int
4c4b4cd2 7178variant_field_index (struct type *type)
14f9c5c9
AS
7179{
7180 int f;
7181
4c4b4cd2
PH
7182 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_STRUCT)
7183 return -1;
7184
7185 for (f = 0; f < TYPE_NFIELDS (type); f += 1)
7186 {
7187 if (ada_is_variant_part (type, f))
7188 return f;
7189 }
7190 return -1;
14f9c5c9
AS
7191}
7192
4c4b4cd2
PH
7193/* A record type with no fields. */
7194
d2e4a39e 7195static struct type *
e9bb382b 7196empty_record (struct type *template)
14f9c5c9 7197{
e9bb382b 7198 struct type *type = alloc_type_copy (template);
5b4ee69b 7199
14f9c5c9
AS
7200 TYPE_CODE (type) = TYPE_CODE_STRUCT;
7201 TYPE_NFIELDS (type) = 0;
7202 TYPE_FIELDS (type) = NULL;
b1f33ddd 7203 INIT_CPLUS_SPECIFIC (type);
14f9c5c9
AS
7204 TYPE_NAME (type) = "<empty>";
7205 TYPE_TAG_NAME (type) = NULL;
14f9c5c9
AS
7206 TYPE_LENGTH (type) = 0;
7207 return type;
7208}
7209
7210/* An ordinary record type (with fixed-length fields) that describes
4c4b4cd2
PH
7211 the value of type TYPE at VALADDR or ADDRESS (see comments at
7212 the beginning of this section) VAL according to GNAT conventions.
7213 DVAL0 should describe the (portion of a) record that contains any
df407dfe 7214 necessary discriminants. It should be NULL if value_type (VAL) is
14f9c5c9
AS
7215 an outer-level type (i.e., as opposed to a branch of a variant.) A
7216 variant field (unless unchecked) is replaced by a particular branch
4c4b4cd2 7217 of the variant.
14f9c5c9 7218
4c4b4cd2
PH
7219 If not KEEP_DYNAMIC_FIELDS, then all fields whose position or
7220 length are not statically known are discarded. As a consequence,
7221 VALADDR, ADDRESS and DVAL0 are ignored.
7222
7223 NOTE: Limitations: For now, we assume that dynamic fields and
7224 variants occupy whole numbers of bytes. However, they need not be
7225 byte-aligned. */
7226
7227struct type *
10a2c479 7228ada_template_to_fixed_record_type_1 (struct type *type,
fc1a4b47 7229 const gdb_byte *valaddr,
4c4b4cd2
PH
7230 CORE_ADDR address, struct value *dval0,
7231 int keep_dynamic_fields)
14f9c5c9 7232{
d2e4a39e
AS
7233 struct value *mark = value_mark ();
7234 struct value *dval;
7235 struct type *rtype;
14f9c5c9 7236 int nfields, bit_len;
4c4b4cd2 7237 int variant_field;
14f9c5c9 7238 long off;
d94e4f4f 7239 int fld_bit_len;
14f9c5c9
AS
7240 int f;
7241
4c4b4cd2
PH
7242 /* Compute the number of fields in this record type that are going
7243 to be processed: unless keep_dynamic_fields, this includes only
7244 fields whose position and length are static will be processed. */
7245 if (keep_dynamic_fields)
7246 nfields = TYPE_NFIELDS (type);
7247 else
7248 {
7249 nfields = 0;
76a01679 7250 while (nfields < TYPE_NFIELDS (type)
4c4b4cd2
PH
7251 && !ada_is_variant_part (type, nfields)
7252 && !is_dynamic_field (type, nfields))
7253 nfields++;
7254 }
7255
e9bb382b 7256 rtype = alloc_type_copy (type);
14f9c5c9
AS
7257 TYPE_CODE (rtype) = TYPE_CODE_STRUCT;
7258 INIT_CPLUS_SPECIFIC (rtype);
7259 TYPE_NFIELDS (rtype) = nfields;
d2e4a39e 7260 TYPE_FIELDS (rtype) = (struct field *)
14f9c5c9
AS
7261 TYPE_ALLOC (rtype, nfields * sizeof (struct field));
7262 memset (TYPE_FIELDS (rtype), 0, sizeof (struct field) * nfields);
7263 TYPE_NAME (rtype) = ada_type_name (type);
7264 TYPE_TAG_NAME (rtype) = NULL;
876cecd0 7265 TYPE_FIXED_INSTANCE (rtype) = 1;
14f9c5c9 7266
d2e4a39e
AS
7267 off = 0;
7268 bit_len = 0;
4c4b4cd2
PH
7269 variant_field = -1;
7270
14f9c5c9
AS
7271 for (f = 0; f < nfields; f += 1)
7272 {
6c038f32
PH
7273 off = align_value (off, field_alignment (type, f))
7274 + TYPE_FIELD_BITPOS (type, f);
14f9c5c9 7275 TYPE_FIELD_BITPOS (rtype, f) = off;
d2e4a39e 7276 TYPE_FIELD_BITSIZE (rtype, f) = 0;
14f9c5c9 7277
d2e4a39e 7278 if (ada_is_variant_part (type, f))
4c4b4cd2
PH
7279 {
7280 variant_field = f;
d94e4f4f 7281 fld_bit_len = 0;
4c4b4cd2 7282 }
14f9c5c9 7283 else if (is_dynamic_field (type, f))
4c4b4cd2 7284 {
284614f0
JB
7285 const gdb_byte *field_valaddr = valaddr;
7286 CORE_ADDR field_address = address;
7287 struct type *field_type =
7288 TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, f));
7289
4c4b4cd2 7290 if (dval0 == NULL)
b5304971
JG
7291 {
7292 /* rtype's length is computed based on the run-time
7293 value of discriminants. If the discriminants are not
7294 initialized, the type size may be completely bogus and
0963b4bd 7295 GDB may fail to allocate a value for it. So check the
b5304971
JG
7296 size first before creating the value. */
7297 check_size (rtype);
7298 dval = value_from_contents_and_address (rtype, valaddr, address);
7299 }
4c4b4cd2
PH
7300 else
7301 dval = dval0;
7302
284614f0
JB
7303 /* If the type referenced by this field is an aligner type, we need
7304 to unwrap that aligner type, because its size might not be set.
7305 Keeping the aligner type would cause us to compute the wrong
7306 size for this field, impacting the offset of the all the fields
7307 that follow this one. */
7308 if (ada_is_aligner_type (field_type))
7309 {
7310 long field_offset = TYPE_FIELD_BITPOS (field_type, f);
7311
7312 field_valaddr = cond_offset_host (field_valaddr, field_offset);
7313 field_address = cond_offset_target (field_address, field_offset);
7314 field_type = ada_aligned_type (field_type);
7315 }
7316
7317 field_valaddr = cond_offset_host (field_valaddr,
7318 off / TARGET_CHAR_BIT);
7319 field_address = cond_offset_target (field_address,
7320 off / TARGET_CHAR_BIT);
7321
7322 /* Get the fixed type of the field. Note that, in this case,
7323 we do not want to get the real type out of the tag: if
7324 the current field is the parent part of a tagged record,
7325 we will get the tag of the object. Clearly wrong: the real
7326 type of the parent is not the real type of the child. We
7327 would end up in an infinite loop. */
7328 field_type = ada_get_base_type (field_type);
7329 field_type = ada_to_fixed_type (field_type, field_valaddr,
7330 field_address, dval, 0);
27f2a97b
JB
7331 /* If the field size is already larger than the maximum
7332 object size, then the record itself will necessarily
7333 be larger than the maximum object size. We need to make
7334 this check now, because the size might be so ridiculously
7335 large (due to an uninitialized variable in the inferior)
7336 that it would cause an overflow when adding it to the
7337 record size. */
7338 check_size (field_type);
284614f0
JB
7339
7340 TYPE_FIELD_TYPE (rtype, f) = field_type;
4c4b4cd2 7341 TYPE_FIELD_NAME (rtype, f) = TYPE_FIELD_NAME (type, f);
27f2a97b
JB
7342 /* The multiplication can potentially overflow. But because
7343 the field length has been size-checked just above, and
7344 assuming that the maximum size is a reasonable value,
7345 an overflow should not happen in practice. So rather than
7346 adding overflow recovery code to this already complex code,
7347 we just assume that it's not going to happen. */
d94e4f4f 7348 fld_bit_len =
4c4b4cd2
PH
7349 TYPE_LENGTH (TYPE_FIELD_TYPE (rtype, f)) * TARGET_CHAR_BIT;
7350 }
14f9c5c9 7351 else
4c4b4cd2 7352 {
9f0dec2d
JB
7353 struct type *field_type = TYPE_FIELD_TYPE (type, f);
7354
720d1a40
JB
7355 /* If our field is a typedef type (most likely a typedef of
7356 a fat pointer, encoding an array access), then we need to
7357 look at its target type to determine its characteristics.
7358 In particular, we would miscompute the field size if we took
7359 the size of the typedef (zero), instead of the size of
7360 the target type. */
7361 if (TYPE_CODE (field_type) == TYPE_CODE_TYPEDEF)
7362 field_type = ada_typedef_target_type (field_type);
7363
9f0dec2d 7364 TYPE_FIELD_TYPE (rtype, f) = field_type;
4c4b4cd2
PH
7365 TYPE_FIELD_NAME (rtype, f) = TYPE_FIELD_NAME (type, f);
7366 if (TYPE_FIELD_BITSIZE (type, f) > 0)
d94e4f4f 7367 fld_bit_len =
4c4b4cd2
PH
7368 TYPE_FIELD_BITSIZE (rtype, f) = TYPE_FIELD_BITSIZE (type, f);
7369 else
d94e4f4f 7370 fld_bit_len =
9f0dec2d 7371 TYPE_LENGTH (ada_check_typedef (field_type)) * TARGET_CHAR_BIT;
4c4b4cd2 7372 }
14f9c5c9 7373 if (off + fld_bit_len > bit_len)
4c4b4cd2 7374 bit_len = off + fld_bit_len;
d94e4f4f 7375 off += fld_bit_len;
4c4b4cd2
PH
7376 TYPE_LENGTH (rtype) =
7377 align_value (bit_len, TARGET_CHAR_BIT) / TARGET_CHAR_BIT;
14f9c5c9 7378 }
4c4b4cd2
PH
7379
7380 /* We handle the variant part, if any, at the end because of certain
b1f33ddd 7381 odd cases in which it is re-ordered so as NOT to be the last field of
4c4b4cd2
PH
7382 the record. This can happen in the presence of representation
7383 clauses. */
7384 if (variant_field >= 0)
7385 {
7386 struct type *branch_type;
7387
7388 off = TYPE_FIELD_BITPOS (rtype, variant_field);
7389
7390 if (dval0 == NULL)
7391 dval = value_from_contents_and_address (rtype, valaddr, address);
7392 else
7393 dval = dval0;
7394
7395 branch_type =
7396 to_fixed_variant_branch_type
7397 (TYPE_FIELD_TYPE (type, variant_field),
7398 cond_offset_host (valaddr, off / TARGET_CHAR_BIT),
7399 cond_offset_target (address, off / TARGET_CHAR_BIT), dval);
7400 if (branch_type == NULL)
7401 {
7402 for (f = variant_field + 1; f < TYPE_NFIELDS (rtype); f += 1)
7403 TYPE_FIELDS (rtype)[f - 1] = TYPE_FIELDS (rtype)[f];
7404 TYPE_NFIELDS (rtype) -= 1;
7405 }
7406 else
7407 {
7408 TYPE_FIELD_TYPE (rtype, variant_field) = branch_type;
7409 TYPE_FIELD_NAME (rtype, variant_field) = "S";
7410 fld_bit_len =
7411 TYPE_LENGTH (TYPE_FIELD_TYPE (rtype, variant_field)) *
7412 TARGET_CHAR_BIT;
7413 if (off + fld_bit_len > bit_len)
7414 bit_len = off + fld_bit_len;
7415 TYPE_LENGTH (rtype) =
7416 align_value (bit_len, TARGET_CHAR_BIT) / TARGET_CHAR_BIT;
7417 }
7418 }
7419
714e53ab
PH
7420 /* According to exp_dbug.ads, the size of TYPE for variable-size records
7421 should contain the alignment of that record, which should be a strictly
7422 positive value. If null or negative, then something is wrong, most
7423 probably in the debug info. In that case, we don't round up the size
0963b4bd 7424 of the resulting type. If this record is not part of another structure,
714e53ab
PH
7425 the current RTYPE length might be good enough for our purposes. */
7426 if (TYPE_LENGTH (type) <= 0)
7427 {
323e0a4a
AC
7428 if (TYPE_NAME (rtype))
7429 warning (_("Invalid type size for `%s' detected: %d."),
7430 TYPE_NAME (rtype), TYPE_LENGTH (type));
7431 else
7432 warning (_("Invalid type size for <unnamed> detected: %d."),
7433 TYPE_LENGTH (type));
714e53ab
PH
7434 }
7435 else
7436 {
7437 TYPE_LENGTH (rtype) = align_value (TYPE_LENGTH (rtype),
7438 TYPE_LENGTH (type));
7439 }
14f9c5c9
AS
7440
7441 value_free_to_mark (mark);
d2e4a39e 7442 if (TYPE_LENGTH (rtype) > varsize_limit)
323e0a4a 7443 error (_("record type with dynamic size is larger than varsize-limit"));
14f9c5c9
AS
7444 return rtype;
7445}
7446
4c4b4cd2
PH
7447/* As for ada_template_to_fixed_record_type_1 with KEEP_DYNAMIC_FIELDS
7448 of 1. */
14f9c5c9 7449
d2e4a39e 7450static struct type *
fc1a4b47 7451template_to_fixed_record_type (struct type *type, const gdb_byte *valaddr,
4c4b4cd2
PH
7452 CORE_ADDR address, struct value *dval0)
7453{
7454 return ada_template_to_fixed_record_type_1 (type, valaddr,
7455 address, dval0, 1);
7456}
7457
7458/* An ordinary record type in which ___XVL-convention fields and
7459 ___XVU- and ___XVN-convention field types in TYPE0 are replaced with
7460 static approximations, containing all possible fields. Uses
7461 no runtime values. Useless for use in values, but that's OK,
7462 since the results are used only for type determinations. Works on both
7463 structs and unions. Representation note: to save space, we memorize
7464 the result of this function in the TYPE_TARGET_TYPE of the
7465 template type. */
7466
7467static struct type *
7468template_to_static_fixed_type (struct type *type0)
14f9c5c9
AS
7469{
7470 struct type *type;
7471 int nfields;
7472 int f;
7473
4c4b4cd2
PH
7474 if (TYPE_TARGET_TYPE (type0) != NULL)
7475 return TYPE_TARGET_TYPE (type0);
7476
7477 nfields = TYPE_NFIELDS (type0);
7478 type = type0;
14f9c5c9
AS
7479
7480 for (f = 0; f < nfields; f += 1)
7481 {
61ee279c 7482 struct type *field_type = ada_check_typedef (TYPE_FIELD_TYPE (type0, f));
4c4b4cd2 7483 struct type *new_type;
14f9c5c9 7484
4c4b4cd2
PH
7485 if (is_dynamic_field (type0, f))
7486 new_type = to_static_fixed_type (TYPE_TARGET_TYPE (field_type));
14f9c5c9 7487 else
f192137b 7488 new_type = static_unwrap_type (field_type);
4c4b4cd2
PH
7489 if (type == type0 && new_type != field_type)
7490 {
e9bb382b 7491 TYPE_TARGET_TYPE (type0) = type = alloc_type_copy (type0);
4c4b4cd2
PH
7492 TYPE_CODE (type) = TYPE_CODE (type0);
7493 INIT_CPLUS_SPECIFIC (type);
7494 TYPE_NFIELDS (type) = nfields;
7495 TYPE_FIELDS (type) = (struct field *)
7496 TYPE_ALLOC (type, nfields * sizeof (struct field));
7497 memcpy (TYPE_FIELDS (type), TYPE_FIELDS (type0),
7498 sizeof (struct field) * nfields);
7499 TYPE_NAME (type) = ada_type_name (type0);
7500 TYPE_TAG_NAME (type) = NULL;
876cecd0 7501 TYPE_FIXED_INSTANCE (type) = 1;
4c4b4cd2
PH
7502 TYPE_LENGTH (type) = 0;
7503 }
7504 TYPE_FIELD_TYPE (type, f) = new_type;
7505 TYPE_FIELD_NAME (type, f) = TYPE_FIELD_NAME (type0, f);
14f9c5c9 7506 }
14f9c5c9
AS
7507 return type;
7508}
7509
4c4b4cd2 7510/* Given an object of type TYPE whose contents are at VALADDR and
5823c3ef
JB
7511 whose address in memory is ADDRESS, returns a revision of TYPE,
7512 which should be a non-dynamic-sized record, in which the variant
7513 part, if any, is replaced with the appropriate branch. Looks
4c4b4cd2
PH
7514 for discriminant values in DVAL0, which can be NULL if the record
7515 contains the necessary discriminant values. */
7516
d2e4a39e 7517static struct type *
fc1a4b47 7518to_record_with_fixed_variant_part (struct type *type, const gdb_byte *valaddr,
4c4b4cd2 7519 CORE_ADDR address, struct value *dval0)
14f9c5c9 7520{
d2e4a39e 7521 struct value *mark = value_mark ();
4c4b4cd2 7522 struct value *dval;
d2e4a39e 7523 struct type *rtype;
14f9c5c9
AS
7524 struct type *branch_type;
7525 int nfields = TYPE_NFIELDS (type);
4c4b4cd2 7526 int variant_field = variant_field_index (type);
14f9c5c9 7527
4c4b4cd2 7528 if (variant_field == -1)
14f9c5c9
AS
7529 return type;
7530
4c4b4cd2
PH
7531 if (dval0 == NULL)
7532 dval = value_from_contents_and_address (type, valaddr, address);
7533 else
7534 dval = dval0;
7535
e9bb382b 7536 rtype = alloc_type_copy (type);
14f9c5c9 7537 TYPE_CODE (rtype) = TYPE_CODE_STRUCT;
4c4b4cd2
PH
7538 INIT_CPLUS_SPECIFIC (rtype);
7539 TYPE_NFIELDS (rtype) = nfields;
d2e4a39e
AS
7540 TYPE_FIELDS (rtype) =
7541 (struct field *) TYPE_ALLOC (rtype, nfields * sizeof (struct field));
7542 memcpy (TYPE_FIELDS (rtype), TYPE_FIELDS (type),
4c4b4cd2 7543 sizeof (struct field) * nfields);
14f9c5c9
AS
7544 TYPE_NAME (rtype) = ada_type_name (type);
7545 TYPE_TAG_NAME (rtype) = NULL;
876cecd0 7546 TYPE_FIXED_INSTANCE (rtype) = 1;
14f9c5c9
AS
7547 TYPE_LENGTH (rtype) = TYPE_LENGTH (type);
7548
4c4b4cd2
PH
7549 branch_type = to_fixed_variant_branch_type
7550 (TYPE_FIELD_TYPE (type, variant_field),
d2e4a39e 7551 cond_offset_host (valaddr,
4c4b4cd2
PH
7552 TYPE_FIELD_BITPOS (type, variant_field)
7553 / TARGET_CHAR_BIT),
d2e4a39e 7554 cond_offset_target (address,
4c4b4cd2
PH
7555 TYPE_FIELD_BITPOS (type, variant_field)
7556 / TARGET_CHAR_BIT), dval);
d2e4a39e 7557 if (branch_type == NULL)
14f9c5c9 7558 {
4c4b4cd2 7559 int f;
5b4ee69b 7560
4c4b4cd2
PH
7561 for (f = variant_field + 1; f < nfields; f += 1)
7562 TYPE_FIELDS (rtype)[f - 1] = TYPE_FIELDS (rtype)[f];
14f9c5c9 7563 TYPE_NFIELDS (rtype) -= 1;
14f9c5c9
AS
7564 }
7565 else
7566 {
4c4b4cd2
PH
7567 TYPE_FIELD_TYPE (rtype, variant_field) = branch_type;
7568 TYPE_FIELD_NAME (rtype, variant_field) = "S";
7569 TYPE_FIELD_BITSIZE (rtype, variant_field) = 0;
14f9c5c9 7570 TYPE_LENGTH (rtype) += TYPE_LENGTH (branch_type);
14f9c5c9 7571 }
4c4b4cd2 7572 TYPE_LENGTH (rtype) -= TYPE_LENGTH (TYPE_FIELD_TYPE (type, variant_field));
d2e4a39e 7573
4c4b4cd2 7574 value_free_to_mark (mark);
14f9c5c9
AS
7575 return rtype;
7576}
7577
7578/* An ordinary record type (with fixed-length fields) that describes
7579 the value at (TYPE0, VALADDR, ADDRESS) [see explanation at
7580 beginning of this section]. Any necessary discriminants' values
4c4b4cd2
PH
7581 should be in DVAL, a record value; it may be NULL if the object
7582 at ADDR itself contains any necessary discriminant values.
7583 Additionally, VALADDR and ADDRESS may also be NULL if no discriminant
7584 values from the record are needed. Except in the case that DVAL,
7585 VALADDR, and ADDRESS are all 0 or NULL, a variant field (unless
7586 unchecked) is replaced by a particular branch of the variant.
7587
7588 NOTE: the case in which DVAL and VALADDR are NULL and ADDRESS is 0
7589 is questionable and may be removed. It can arise during the
7590 processing of an unconstrained-array-of-record type where all the
7591 variant branches have exactly the same size. This is because in
7592 such cases, the compiler does not bother to use the XVS convention
7593 when encoding the record. I am currently dubious of this
7594 shortcut and suspect the compiler should be altered. FIXME. */
14f9c5c9 7595
d2e4a39e 7596static struct type *
fc1a4b47 7597to_fixed_record_type (struct type *type0, const gdb_byte *valaddr,
4c4b4cd2 7598 CORE_ADDR address, struct value *dval)
14f9c5c9 7599{
d2e4a39e 7600 struct type *templ_type;
14f9c5c9 7601
876cecd0 7602 if (TYPE_FIXED_INSTANCE (type0))
4c4b4cd2
PH
7603 return type0;
7604
d2e4a39e 7605 templ_type = dynamic_template_type (type0);
14f9c5c9
AS
7606
7607 if (templ_type != NULL)
7608 return template_to_fixed_record_type (templ_type, valaddr, address, dval);
4c4b4cd2
PH
7609 else if (variant_field_index (type0) >= 0)
7610 {
7611 if (dval == NULL && valaddr == NULL && address == 0)
7612 return type0;
7613 return to_record_with_fixed_variant_part (type0, valaddr, address,
7614 dval);
7615 }
14f9c5c9
AS
7616 else
7617 {
876cecd0 7618 TYPE_FIXED_INSTANCE (type0) = 1;
14f9c5c9
AS
7619 return type0;
7620 }
7621
7622}
7623
7624/* An ordinary record type (with fixed-length fields) that describes
7625 the value at (VAR_TYPE0, VALADDR, ADDRESS), where VAR_TYPE0 is a
7626 union type. Any necessary discriminants' values should be in DVAL,
7627 a record value. That is, this routine selects the appropriate
7628 branch of the union at ADDR according to the discriminant value
b1f33ddd 7629 indicated in the union's type name. Returns VAR_TYPE0 itself if
0963b4bd 7630 it represents a variant subject to a pragma Unchecked_Union. */
14f9c5c9 7631
d2e4a39e 7632static struct type *
fc1a4b47 7633to_fixed_variant_branch_type (struct type *var_type0, const gdb_byte *valaddr,
4c4b4cd2 7634 CORE_ADDR address, struct value *dval)
14f9c5c9
AS
7635{
7636 int which;
d2e4a39e
AS
7637 struct type *templ_type;
7638 struct type *var_type;
14f9c5c9
AS
7639
7640 if (TYPE_CODE (var_type0) == TYPE_CODE_PTR)
7641 var_type = TYPE_TARGET_TYPE (var_type0);
d2e4a39e 7642 else
14f9c5c9
AS
7643 var_type = var_type0;
7644
7645 templ_type = ada_find_parallel_type (var_type, "___XVU");
7646
7647 if (templ_type != NULL)
7648 var_type = templ_type;
7649
b1f33ddd
JB
7650 if (is_unchecked_variant (var_type, value_type (dval)))
7651 return var_type0;
d2e4a39e
AS
7652 which =
7653 ada_which_variant_applies (var_type,
0fd88904 7654 value_type (dval), value_contents (dval));
14f9c5c9
AS
7655
7656 if (which < 0)
e9bb382b 7657 return empty_record (var_type);
14f9c5c9 7658 else if (is_dynamic_field (var_type, which))
4c4b4cd2 7659 return to_fixed_record_type
d2e4a39e
AS
7660 (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (var_type, which)),
7661 valaddr, address, dval);
4c4b4cd2 7662 else if (variant_field_index (TYPE_FIELD_TYPE (var_type, which)) >= 0)
d2e4a39e
AS
7663 return
7664 to_fixed_record_type
7665 (TYPE_FIELD_TYPE (var_type, which), valaddr, address, dval);
14f9c5c9
AS
7666 else
7667 return TYPE_FIELD_TYPE (var_type, which);
7668}
7669
7670/* Assuming that TYPE0 is an array type describing the type of a value
7671 at ADDR, and that DVAL describes a record containing any
7672 discriminants used in TYPE0, returns a type for the value that
7673 contains no dynamic components (that is, no components whose sizes
7674 are determined by run-time quantities). Unless IGNORE_TOO_BIG is
7675 true, gives an error message if the resulting type's size is over
4c4b4cd2 7676 varsize_limit. */
14f9c5c9 7677
d2e4a39e
AS
7678static struct type *
7679to_fixed_array_type (struct type *type0, struct value *dval,
4c4b4cd2 7680 int ignore_too_big)
14f9c5c9 7681{
d2e4a39e
AS
7682 struct type *index_type_desc;
7683 struct type *result;
ad82864c 7684 int constrained_packed_array_p;
14f9c5c9 7685
b0dd7688 7686 type0 = ada_check_typedef (type0);
284614f0 7687 if (TYPE_FIXED_INSTANCE (type0))
4c4b4cd2 7688 return type0;
14f9c5c9 7689
ad82864c
JB
7690 constrained_packed_array_p = ada_is_constrained_packed_array_type (type0);
7691 if (constrained_packed_array_p)
7692 type0 = decode_constrained_packed_array_type (type0);
284614f0 7693
14f9c5c9 7694 index_type_desc = ada_find_parallel_type (type0, "___XA");
28c85d6c 7695 ada_fixup_array_indexes_type (index_type_desc);
14f9c5c9
AS
7696 if (index_type_desc == NULL)
7697 {
61ee279c 7698 struct type *elt_type0 = ada_check_typedef (TYPE_TARGET_TYPE (type0));
5b4ee69b 7699
14f9c5c9 7700 /* NOTE: elt_type---the fixed version of elt_type0---should never
4c4b4cd2
PH
7701 depend on the contents of the array in properly constructed
7702 debugging data. */
529cad9c
PH
7703 /* Create a fixed version of the array element type.
7704 We're not providing the address of an element here,
e1d5a0d2 7705 and thus the actual object value cannot be inspected to do
529cad9c
PH
7706 the conversion. This should not be a problem, since arrays of
7707 unconstrained objects are not allowed. In particular, all
7708 the elements of an array of a tagged type should all be of
7709 the same type specified in the debugging info. No need to
7710 consult the object tag. */
1ed6ede0 7711 struct type *elt_type = ada_to_fixed_type (elt_type0, 0, 0, dval, 1);
14f9c5c9 7712
284614f0
JB
7713 /* Make sure we always create a new array type when dealing with
7714 packed array types, since we're going to fix-up the array
7715 type length and element bitsize a little further down. */
ad82864c 7716 if (elt_type0 == elt_type && !constrained_packed_array_p)
4c4b4cd2 7717 result = type0;
14f9c5c9 7718 else
e9bb382b 7719 result = create_array_type (alloc_type_copy (type0),
4c4b4cd2 7720 elt_type, TYPE_INDEX_TYPE (type0));
14f9c5c9
AS
7721 }
7722 else
7723 {
7724 int i;
7725 struct type *elt_type0;
7726
7727 elt_type0 = type0;
7728 for (i = TYPE_NFIELDS (index_type_desc); i > 0; i -= 1)
4c4b4cd2 7729 elt_type0 = TYPE_TARGET_TYPE (elt_type0);
14f9c5c9
AS
7730
7731 /* NOTE: result---the fixed version of elt_type0---should never
4c4b4cd2
PH
7732 depend on the contents of the array in properly constructed
7733 debugging data. */
529cad9c
PH
7734 /* Create a fixed version of the array element type.
7735 We're not providing the address of an element here,
e1d5a0d2 7736 and thus the actual object value cannot be inspected to do
529cad9c
PH
7737 the conversion. This should not be a problem, since arrays of
7738 unconstrained objects are not allowed. In particular, all
7739 the elements of an array of a tagged type should all be of
7740 the same type specified in the debugging info. No need to
7741 consult the object tag. */
1ed6ede0
JB
7742 result =
7743 ada_to_fixed_type (ada_check_typedef (elt_type0), 0, 0, dval, 1);
1ce677a4
UW
7744
7745 elt_type0 = type0;
14f9c5c9 7746 for (i = TYPE_NFIELDS (index_type_desc) - 1; i >= 0; i -= 1)
4c4b4cd2
PH
7747 {
7748 struct type *range_type =
28c85d6c 7749 to_fixed_range_type (TYPE_FIELD_TYPE (index_type_desc, i), dval);
5b4ee69b 7750
e9bb382b 7751 result = create_array_type (alloc_type_copy (elt_type0),
4c4b4cd2 7752 result, range_type);
1ce677a4 7753 elt_type0 = TYPE_TARGET_TYPE (elt_type0);
4c4b4cd2 7754 }
d2e4a39e 7755 if (!ignore_too_big && TYPE_LENGTH (result) > varsize_limit)
323e0a4a 7756 error (_("array type with dynamic size is larger than varsize-limit"));
14f9c5c9
AS
7757 }
7758
ad82864c 7759 if (constrained_packed_array_p)
284614f0
JB
7760 {
7761 /* So far, the resulting type has been created as if the original
7762 type was a regular (non-packed) array type. As a result, the
7763 bitsize of the array elements needs to be set again, and the array
7764 length needs to be recomputed based on that bitsize. */
7765 int len = TYPE_LENGTH (result) / TYPE_LENGTH (TYPE_TARGET_TYPE (result));
7766 int elt_bitsize = TYPE_FIELD_BITSIZE (type0, 0);
7767
7768 TYPE_FIELD_BITSIZE (result, 0) = TYPE_FIELD_BITSIZE (type0, 0);
7769 TYPE_LENGTH (result) = len * elt_bitsize / HOST_CHAR_BIT;
7770 if (TYPE_LENGTH (result) * HOST_CHAR_BIT < len * elt_bitsize)
7771 TYPE_LENGTH (result)++;
7772 }
7773
876cecd0 7774 TYPE_FIXED_INSTANCE (result) = 1;
14f9c5c9 7775 return result;
d2e4a39e 7776}
14f9c5c9
AS
7777
7778
7779/* A standard type (containing no dynamically sized components)
7780 corresponding to TYPE for the value (TYPE, VALADDR, ADDRESS)
7781 DVAL describes a record containing any discriminants used in TYPE0,
4c4b4cd2 7782 and may be NULL if there are none, or if the object of type TYPE at
529cad9c
PH
7783 ADDRESS or in VALADDR contains these discriminants.
7784
1ed6ede0
JB
7785 If CHECK_TAG is not null, in the case of tagged types, this function
7786 attempts to locate the object's tag and use it to compute the actual
7787 type. However, when ADDRESS is null, we cannot use it to determine the
7788 location of the tag, and therefore compute the tagged type's actual type.
7789 So we return the tagged type without consulting the tag. */
529cad9c 7790
f192137b
JB
7791static struct type *
7792ada_to_fixed_type_1 (struct type *type, const gdb_byte *valaddr,
1ed6ede0 7793 CORE_ADDR address, struct value *dval, int check_tag)
14f9c5c9 7794{
61ee279c 7795 type = ada_check_typedef (type);
d2e4a39e
AS
7796 switch (TYPE_CODE (type))
7797 {
7798 default:
14f9c5c9 7799 return type;
d2e4a39e 7800 case TYPE_CODE_STRUCT:
4c4b4cd2 7801 {
76a01679 7802 struct type *static_type = to_static_fixed_type (type);
1ed6ede0
JB
7803 struct type *fixed_record_type =
7804 to_fixed_record_type (type, valaddr, address, NULL);
5b4ee69b 7805
529cad9c
PH
7806 /* If STATIC_TYPE is a tagged type and we know the object's address,
7807 then we can determine its tag, and compute the object's actual
0963b4bd 7808 type from there. Note that we have to use the fixed record
1ed6ede0
JB
7809 type (the parent part of the record may have dynamic fields
7810 and the way the location of _tag is expressed may depend on
7811 them). */
529cad9c 7812
1ed6ede0 7813 if (check_tag && address != 0 && ada_is_tagged_type (static_type, 0))
76a01679
JB
7814 {
7815 struct type *real_type =
1ed6ede0
JB
7816 type_from_tag (value_tag_from_contents_and_address
7817 (fixed_record_type,
7818 valaddr,
7819 address));
5b4ee69b 7820
76a01679 7821 if (real_type != NULL)
1ed6ede0 7822 return to_fixed_record_type (real_type, valaddr, address, NULL);
76a01679 7823 }
4af88198
JB
7824
7825 /* Check to see if there is a parallel ___XVZ variable.
7826 If there is, then it provides the actual size of our type. */
7827 else if (ada_type_name (fixed_record_type) != NULL)
7828 {
7829 char *name = ada_type_name (fixed_record_type);
7830 char *xvz_name = alloca (strlen (name) + 7 /* "___XVZ\0" */);
7831 int xvz_found = 0;
7832 LONGEST size;
7833
88c15c34 7834 xsnprintf (xvz_name, strlen (name) + 7, "%s___XVZ", name);
4af88198
JB
7835 size = get_int_var_value (xvz_name, &xvz_found);
7836 if (xvz_found && TYPE_LENGTH (fixed_record_type) != size)
7837 {
7838 fixed_record_type = copy_type (fixed_record_type);
7839 TYPE_LENGTH (fixed_record_type) = size;
7840
7841 /* The FIXED_RECORD_TYPE may have be a stub. We have
7842 observed this when the debugging info is STABS, and
7843 apparently it is something that is hard to fix.
7844
7845 In practice, we don't need the actual type definition
7846 at all, because the presence of the XVZ variable allows us
7847 to assume that there must be a XVS type as well, which we
7848 should be able to use later, when we need the actual type
7849 definition.
7850
7851 In the meantime, pretend that the "fixed" type we are
7852 returning is NOT a stub, because this can cause trouble
7853 when using this type to create new types targeting it.
7854 Indeed, the associated creation routines often check
7855 whether the target type is a stub and will try to replace
0963b4bd 7856 it, thus using a type with the wrong size. This, in turn,
4af88198
JB
7857 might cause the new type to have the wrong size too.
7858 Consider the case of an array, for instance, where the size
7859 of the array is computed from the number of elements in
7860 our array multiplied by the size of its element. */
7861 TYPE_STUB (fixed_record_type) = 0;
7862 }
7863 }
1ed6ede0 7864 return fixed_record_type;
4c4b4cd2 7865 }
d2e4a39e 7866 case TYPE_CODE_ARRAY:
4c4b4cd2 7867 return to_fixed_array_type (type, dval, 1);
d2e4a39e
AS
7868 case TYPE_CODE_UNION:
7869 if (dval == NULL)
4c4b4cd2 7870 return type;
d2e4a39e 7871 else
4c4b4cd2 7872 return to_fixed_variant_branch_type (type, valaddr, address, dval);
d2e4a39e 7873 }
14f9c5c9
AS
7874}
7875
f192137b
JB
7876/* The same as ada_to_fixed_type_1, except that it preserves the type
7877 if it is a TYPE_CODE_TYPEDEF of a type that is already fixed.
96dbd2c1
JB
7878
7879 The typedef layer needs be preserved in order to differentiate between
7880 arrays and array pointers when both types are implemented using the same
7881 fat pointer. In the array pointer case, the pointer is encoded as
7882 a typedef of the pointer type. For instance, considering:
7883
7884 type String_Access is access String;
7885 S1 : String_Access := null;
7886
7887 To the debugger, S1 is defined as a typedef of type String. But
7888 to the user, it is a pointer. So if the user tries to print S1,
7889 we should not dereference the array, but print the array address
7890 instead.
7891
7892 If we didn't preserve the typedef layer, we would lose the fact that
7893 the type is to be presented as a pointer (needs de-reference before
7894 being printed). And we would also use the source-level type name. */
f192137b
JB
7895
7896struct type *
7897ada_to_fixed_type (struct type *type, const gdb_byte *valaddr,
7898 CORE_ADDR address, struct value *dval, int check_tag)
7899
7900{
7901 struct type *fixed_type =
7902 ada_to_fixed_type_1 (type, valaddr, address, dval, check_tag);
7903
96dbd2c1
JB
7904 /* If TYPE is a typedef and its target type is the same as the FIXED_TYPE,
7905 then preserve the typedef layer.
7906
7907 Implementation note: We can only check the main-type portion of
7908 the TYPE and FIXED_TYPE, because eliminating the typedef layer
7909 from TYPE now returns a type that has the same instance flags
7910 as TYPE. For instance, if TYPE is a "typedef const", and its
7911 target type is a "struct", then the typedef elimination will return
7912 a "const" version of the target type. See check_typedef for more
7913 details about how the typedef layer elimination is done.
7914
7915 brobecker/2010-11-19: It seems to me that the only case where it is
7916 useful to preserve the typedef layer is when dealing with fat pointers.
7917 Perhaps, we could add a check for that and preserve the typedef layer
7918 only in that situation. But this seems unecessary so far, probably
7919 because we call check_typedef/ada_check_typedef pretty much everywhere.
7920 */
f192137b 7921 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF
720d1a40 7922 && (TYPE_MAIN_TYPE (ada_typedef_target_type (type))
96dbd2c1 7923 == TYPE_MAIN_TYPE (fixed_type)))
f192137b
JB
7924 return type;
7925
7926 return fixed_type;
7927}
7928
14f9c5c9 7929/* A standard (static-sized) type corresponding as well as possible to
4c4b4cd2 7930 TYPE0, but based on no runtime data. */
14f9c5c9 7931
d2e4a39e
AS
7932static struct type *
7933to_static_fixed_type (struct type *type0)
14f9c5c9 7934{
d2e4a39e 7935 struct type *type;
14f9c5c9
AS
7936
7937 if (type0 == NULL)
7938 return NULL;
7939
876cecd0 7940 if (TYPE_FIXED_INSTANCE (type0))
4c4b4cd2
PH
7941 return type0;
7942
61ee279c 7943 type0 = ada_check_typedef (type0);
d2e4a39e 7944
14f9c5c9
AS
7945 switch (TYPE_CODE (type0))
7946 {
7947 default:
7948 return type0;
7949 case TYPE_CODE_STRUCT:
7950 type = dynamic_template_type (type0);
d2e4a39e 7951 if (type != NULL)
4c4b4cd2
PH
7952 return template_to_static_fixed_type (type);
7953 else
7954 return template_to_static_fixed_type (type0);
14f9c5c9
AS
7955 case TYPE_CODE_UNION:
7956 type = ada_find_parallel_type (type0, "___XVU");
7957 if (type != NULL)
4c4b4cd2
PH
7958 return template_to_static_fixed_type (type);
7959 else
7960 return template_to_static_fixed_type (type0);
14f9c5c9
AS
7961 }
7962}
7963
4c4b4cd2
PH
7964/* A static approximation of TYPE with all type wrappers removed. */
7965
d2e4a39e
AS
7966static struct type *
7967static_unwrap_type (struct type *type)
14f9c5c9
AS
7968{
7969 if (ada_is_aligner_type (type))
7970 {
61ee279c 7971 struct type *type1 = TYPE_FIELD_TYPE (ada_check_typedef (type), 0);
14f9c5c9 7972 if (ada_type_name (type1) == NULL)
4c4b4cd2 7973 TYPE_NAME (type1) = ada_type_name (type);
14f9c5c9
AS
7974
7975 return static_unwrap_type (type1);
7976 }
d2e4a39e 7977 else
14f9c5c9 7978 {
d2e4a39e 7979 struct type *raw_real_type = ada_get_base_type (type);
5b4ee69b 7980
d2e4a39e 7981 if (raw_real_type == type)
4c4b4cd2 7982 return type;
14f9c5c9 7983 else
4c4b4cd2 7984 return to_static_fixed_type (raw_real_type);
14f9c5c9
AS
7985 }
7986}
7987
7988/* In some cases, incomplete and private types require
4c4b4cd2 7989 cross-references that are not resolved as records (for example,
14f9c5c9
AS
7990 type Foo;
7991 type FooP is access Foo;
7992 V: FooP;
7993 type Foo is array ...;
4c4b4cd2 7994 ). In these cases, since there is no mechanism for producing
14f9c5c9
AS
7995 cross-references to such types, we instead substitute for FooP a
7996 stub enumeration type that is nowhere resolved, and whose tag is
4c4b4cd2 7997 the name of the actual type. Call these types "non-record stubs". */
14f9c5c9
AS
7998
7999/* A type equivalent to TYPE that is not a non-record stub, if one
4c4b4cd2
PH
8000 exists, otherwise TYPE. */
8001
d2e4a39e 8002struct type *
61ee279c 8003ada_check_typedef (struct type *type)
14f9c5c9 8004{
727e3d2e
JB
8005 if (type == NULL)
8006 return NULL;
8007
720d1a40
JB
8008 /* If our type is a typedef type of a fat pointer, then we're done.
8009 We don't want to strip the TYPE_CODE_TYPDEF layer, because this is
8010 what allows us to distinguish between fat pointers that represent
8011 array types, and fat pointers that represent array access types
8012 (in both cases, the compiler implements them as fat pointers). */
8013 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF
8014 && is_thick_pntr (ada_typedef_target_type (type)))
8015 return type;
8016
14f9c5c9
AS
8017 CHECK_TYPEDEF (type);
8018 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_ENUM
529cad9c 8019 || !TYPE_STUB (type)
14f9c5c9
AS
8020 || TYPE_TAG_NAME (type) == NULL)
8021 return type;
d2e4a39e 8022 else
14f9c5c9 8023 {
d2e4a39e
AS
8024 char *name = TYPE_TAG_NAME (type);
8025 struct type *type1 = ada_find_any_type (name);
5b4ee69b 8026
05e522ef
JB
8027 if (type1 == NULL)
8028 return type;
8029
8030 /* TYPE1 might itself be a TYPE_CODE_TYPEDEF (this can happen with
8031 stubs pointing to arrays, as we don't create symbols for array
3a867c22
JB
8032 types, only for the typedef-to-array types). If that's the case,
8033 strip the typedef layer. */
8034 if (TYPE_CODE (type1) == TYPE_CODE_TYPEDEF)
8035 type1 = ada_check_typedef (type1);
8036
8037 return type1;
14f9c5c9
AS
8038 }
8039}
8040
8041/* A value representing the data at VALADDR/ADDRESS as described by
8042 type TYPE0, but with a standard (static-sized) type that correctly
8043 describes it. If VAL0 is not NULL and TYPE0 already is a standard
8044 type, then return VAL0 [this feature is simply to avoid redundant
4c4b4cd2 8045 creation of struct values]. */
14f9c5c9 8046
4c4b4cd2
PH
8047static struct value *
8048ada_to_fixed_value_create (struct type *type0, CORE_ADDR address,
8049 struct value *val0)
14f9c5c9 8050{
1ed6ede0 8051 struct type *type = ada_to_fixed_type (type0, 0, address, NULL, 1);
5b4ee69b 8052
14f9c5c9
AS
8053 if (type == type0 && val0 != NULL)
8054 return val0;
d2e4a39e 8055 else
4c4b4cd2
PH
8056 return value_from_contents_and_address (type, 0, address);
8057}
8058
8059/* A value representing VAL, but with a standard (static-sized) type
8060 that correctly describes it. Does not necessarily create a new
8061 value. */
8062
0c3acc09 8063struct value *
4c4b4cd2
PH
8064ada_to_fixed_value (struct value *val)
8065{
df407dfe 8066 return ada_to_fixed_value_create (value_type (val),
42ae5230 8067 value_address (val),
4c4b4cd2 8068 val);
14f9c5c9 8069}
d2e4a39e 8070\f
14f9c5c9 8071
14f9c5c9
AS
8072/* Attributes */
8073
4c4b4cd2
PH
8074/* Table mapping attribute numbers to names.
8075 NOTE: Keep up to date with enum ada_attribute definition in ada-lang.h. */
14f9c5c9 8076
d2e4a39e 8077static const char *attribute_names[] = {
14f9c5c9
AS
8078 "<?>",
8079
d2e4a39e 8080 "first",
14f9c5c9
AS
8081 "last",
8082 "length",
8083 "image",
14f9c5c9
AS
8084 "max",
8085 "min",
4c4b4cd2
PH
8086 "modulus",
8087 "pos",
8088 "size",
8089 "tag",
14f9c5c9 8090 "val",
14f9c5c9
AS
8091 0
8092};
8093
d2e4a39e 8094const char *
4c4b4cd2 8095ada_attribute_name (enum exp_opcode n)
14f9c5c9 8096{
4c4b4cd2
PH
8097 if (n >= OP_ATR_FIRST && n <= (int) OP_ATR_VAL)
8098 return attribute_names[n - OP_ATR_FIRST + 1];
14f9c5c9
AS
8099 else
8100 return attribute_names[0];
8101}
8102
4c4b4cd2 8103/* Evaluate the 'POS attribute applied to ARG. */
14f9c5c9 8104
4c4b4cd2
PH
8105static LONGEST
8106pos_atr (struct value *arg)
14f9c5c9 8107{
24209737
PH
8108 struct value *val = coerce_ref (arg);
8109 struct type *type = value_type (val);
14f9c5c9 8110
d2e4a39e 8111 if (!discrete_type_p (type))
323e0a4a 8112 error (_("'POS only defined on discrete types"));
14f9c5c9
AS
8113
8114 if (TYPE_CODE (type) == TYPE_CODE_ENUM)
8115 {
8116 int i;
24209737 8117 LONGEST v = value_as_long (val);
14f9c5c9 8118
d2e4a39e 8119 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
4c4b4cd2
PH
8120 {
8121 if (v == TYPE_FIELD_BITPOS (type, i))
8122 return i;
8123 }
323e0a4a 8124 error (_("enumeration value is invalid: can't find 'POS"));
14f9c5c9
AS
8125 }
8126 else
24209737 8127 return value_as_long (val);
4c4b4cd2
PH
8128}
8129
8130static struct value *
3cb382c9 8131value_pos_atr (struct type *type, struct value *arg)
4c4b4cd2 8132{
3cb382c9 8133 return value_from_longest (type, pos_atr (arg));
14f9c5c9
AS
8134}
8135
4c4b4cd2 8136/* Evaluate the TYPE'VAL attribute applied to ARG. */
14f9c5c9 8137
d2e4a39e
AS
8138static struct value *
8139value_val_atr (struct type *type, struct value *arg)
14f9c5c9 8140{
d2e4a39e 8141 if (!discrete_type_p (type))
323e0a4a 8142 error (_("'VAL only defined on discrete types"));
df407dfe 8143 if (!integer_type_p (value_type (arg)))
323e0a4a 8144 error (_("'VAL requires integral argument"));
14f9c5c9
AS
8145
8146 if (TYPE_CODE (type) == TYPE_CODE_ENUM)
8147 {
8148 long pos = value_as_long (arg);
5b4ee69b 8149
14f9c5c9 8150 if (pos < 0 || pos >= TYPE_NFIELDS (type))
323e0a4a 8151 error (_("argument to 'VAL out of range"));
d2e4a39e 8152 return value_from_longest (type, TYPE_FIELD_BITPOS (type, pos));
14f9c5c9
AS
8153 }
8154 else
8155 return value_from_longest (type, value_as_long (arg));
8156}
14f9c5c9 8157\f
d2e4a39e 8158
4c4b4cd2 8159 /* Evaluation */
14f9c5c9 8160
4c4b4cd2
PH
8161/* True if TYPE appears to be an Ada character type.
8162 [At the moment, this is true only for Character and Wide_Character;
8163 It is a heuristic test that could stand improvement]. */
14f9c5c9 8164
d2e4a39e
AS
8165int
8166ada_is_character_type (struct type *type)
14f9c5c9 8167{
7b9f71f2
JB
8168 const char *name;
8169
8170 /* If the type code says it's a character, then assume it really is,
8171 and don't check any further. */
8172 if (TYPE_CODE (type) == TYPE_CODE_CHAR)
8173 return 1;
8174
8175 /* Otherwise, assume it's a character type iff it is a discrete type
8176 with a known character type name. */
8177 name = ada_type_name (type);
8178 return (name != NULL
8179 && (TYPE_CODE (type) == TYPE_CODE_INT
8180 || TYPE_CODE (type) == TYPE_CODE_RANGE)
8181 && (strcmp (name, "character") == 0
8182 || strcmp (name, "wide_character") == 0
5a517ebd 8183 || strcmp (name, "wide_wide_character") == 0
7b9f71f2 8184 || strcmp (name, "unsigned char") == 0));
14f9c5c9
AS
8185}
8186
4c4b4cd2 8187/* True if TYPE appears to be an Ada string type. */
14f9c5c9
AS
8188
8189int
ebf56fd3 8190ada_is_string_type (struct type *type)
14f9c5c9 8191{
61ee279c 8192 type = ada_check_typedef (type);
d2e4a39e 8193 if (type != NULL
14f9c5c9 8194 && TYPE_CODE (type) != TYPE_CODE_PTR
76a01679
JB
8195 && (ada_is_simple_array_type (type)
8196 || ada_is_array_descriptor_type (type))
14f9c5c9
AS
8197 && ada_array_arity (type) == 1)
8198 {
8199 struct type *elttype = ada_array_element_type (type, 1);
8200
8201 return ada_is_character_type (elttype);
8202 }
d2e4a39e 8203 else
14f9c5c9
AS
8204 return 0;
8205}
8206
5bf03f13
JB
8207/* The compiler sometimes provides a parallel XVS type for a given
8208 PAD type. Normally, it is safe to follow the PAD type directly,
8209 but older versions of the compiler have a bug that causes the offset
8210 of its "F" field to be wrong. Following that field in that case
8211 would lead to incorrect results, but this can be worked around
8212 by ignoring the PAD type and using the associated XVS type instead.
8213
8214 Set to True if the debugger should trust the contents of PAD types.
8215 Otherwise, ignore the PAD type if there is a parallel XVS type. */
8216static int trust_pad_over_xvs = 1;
14f9c5c9
AS
8217
8218/* True if TYPE is a struct type introduced by the compiler to force the
8219 alignment of a value. Such types have a single field with a
4c4b4cd2 8220 distinctive name. */
14f9c5c9
AS
8221
8222int
ebf56fd3 8223ada_is_aligner_type (struct type *type)
14f9c5c9 8224{
61ee279c 8225 type = ada_check_typedef (type);
714e53ab 8226
5bf03f13 8227 if (!trust_pad_over_xvs && ada_find_parallel_type (type, "___XVS") != NULL)
714e53ab
PH
8228 return 0;
8229
14f9c5c9 8230 return (TYPE_CODE (type) == TYPE_CODE_STRUCT
4c4b4cd2
PH
8231 && TYPE_NFIELDS (type) == 1
8232 && strcmp (TYPE_FIELD_NAME (type, 0), "F") == 0);
14f9c5c9
AS
8233}
8234
8235/* If there is an ___XVS-convention type parallel to SUBTYPE, return
4c4b4cd2 8236 the parallel type. */
14f9c5c9 8237
d2e4a39e
AS
8238struct type *
8239ada_get_base_type (struct type *raw_type)
14f9c5c9 8240{
d2e4a39e
AS
8241 struct type *real_type_namer;
8242 struct type *raw_real_type;
14f9c5c9
AS
8243
8244 if (raw_type == NULL || TYPE_CODE (raw_type) != TYPE_CODE_STRUCT)
8245 return raw_type;
8246
284614f0
JB
8247 if (ada_is_aligner_type (raw_type))
8248 /* The encoding specifies that we should always use the aligner type.
8249 So, even if this aligner type has an associated XVS type, we should
8250 simply ignore it.
8251
8252 According to the compiler gurus, an XVS type parallel to an aligner
8253 type may exist because of a stabs limitation. In stabs, aligner
8254 types are empty because the field has a variable-sized type, and
8255 thus cannot actually be used as an aligner type. As a result,
8256 we need the associated parallel XVS type to decode the type.
8257 Since the policy in the compiler is to not change the internal
8258 representation based on the debugging info format, we sometimes
8259 end up having a redundant XVS type parallel to the aligner type. */
8260 return raw_type;
8261
14f9c5c9 8262 real_type_namer = ada_find_parallel_type (raw_type, "___XVS");
d2e4a39e 8263 if (real_type_namer == NULL
14f9c5c9
AS
8264 || TYPE_CODE (real_type_namer) != TYPE_CODE_STRUCT
8265 || TYPE_NFIELDS (real_type_namer) != 1)
8266 return raw_type;
8267
f80d3ff2
JB
8268 if (TYPE_CODE (TYPE_FIELD_TYPE (real_type_namer, 0)) != TYPE_CODE_REF)
8269 {
8270 /* This is an older encoding form where the base type needs to be
8271 looked up by name. We prefer the newer enconding because it is
8272 more efficient. */
8273 raw_real_type = ada_find_any_type (TYPE_FIELD_NAME (real_type_namer, 0));
8274 if (raw_real_type == NULL)
8275 return raw_type;
8276 else
8277 return raw_real_type;
8278 }
8279
8280 /* The field in our XVS type is a reference to the base type. */
8281 return TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (real_type_namer, 0));
d2e4a39e 8282}
14f9c5c9 8283
4c4b4cd2 8284/* The type of value designated by TYPE, with all aligners removed. */
14f9c5c9 8285
d2e4a39e
AS
8286struct type *
8287ada_aligned_type (struct type *type)
14f9c5c9
AS
8288{
8289 if (ada_is_aligner_type (type))
8290 return ada_aligned_type (TYPE_FIELD_TYPE (type, 0));
8291 else
8292 return ada_get_base_type (type);
8293}
8294
8295
8296/* The address of the aligned value in an object at address VALADDR
4c4b4cd2 8297 having type TYPE. Assumes ada_is_aligner_type (TYPE). */
14f9c5c9 8298
fc1a4b47
AC
8299const gdb_byte *
8300ada_aligned_value_addr (struct type *type, const gdb_byte *valaddr)
14f9c5c9 8301{
d2e4a39e 8302 if (ada_is_aligner_type (type))
14f9c5c9 8303 return ada_aligned_value_addr (TYPE_FIELD_TYPE (type, 0),
4c4b4cd2
PH
8304 valaddr +
8305 TYPE_FIELD_BITPOS (type,
8306 0) / TARGET_CHAR_BIT);
14f9c5c9
AS
8307 else
8308 return valaddr;
8309}
8310
4c4b4cd2
PH
8311
8312
14f9c5c9 8313/* The printed representation of an enumeration literal with encoded
4c4b4cd2 8314 name NAME. The value is good to the next call of ada_enum_name. */
d2e4a39e
AS
8315const char *
8316ada_enum_name (const char *name)
14f9c5c9 8317{
4c4b4cd2
PH
8318 static char *result;
8319 static size_t result_len = 0;
d2e4a39e 8320 char *tmp;
14f9c5c9 8321
4c4b4cd2
PH
8322 /* First, unqualify the enumeration name:
8323 1. Search for the last '.' character. If we find one, then skip
177b42fe 8324 all the preceding characters, the unqualified name starts
76a01679 8325 right after that dot.
4c4b4cd2 8326 2. Otherwise, we may be debugging on a target where the compiler
76a01679
JB
8327 translates dots into "__". Search forward for double underscores,
8328 but stop searching when we hit an overloading suffix, which is
8329 of the form "__" followed by digits. */
4c4b4cd2 8330
c3e5cd34
PH
8331 tmp = strrchr (name, '.');
8332 if (tmp != NULL)
4c4b4cd2
PH
8333 name = tmp + 1;
8334 else
14f9c5c9 8335 {
4c4b4cd2
PH
8336 while ((tmp = strstr (name, "__")) != NULL)
8337 {
8338 if (isdigit (tmp[2]))
8339 break;
8340 else
8341 name = tmp + 2;
8342 }
14f9c5c9
AS
8343 }
8344
8345 if (name[0] == 'Q')
8346 {
14f9c5c9 8347 int v;
5b4ee69b 8348
14f9c5c9 8349 if (name[1] == 'U' || name[1] == 'W')
4c4b4cd2
PH
8350 {
8351 if (sscanf (name + 2, "%x", &v) != 1)
8352 return name;
8353 }
14f9c5c9 8354 else
4c4b4cd2 8355 return name;
14f9c5c9 8356
4c4b4cd2 8357 GROW_VECT (result, result_len, 16);
14f9c5c9 8358 if (isascii (v) && isprint (v))
88c15c34 8359 xsnprintf (result, result_len, "'%c'", v);
14f9c5c9 8360 else if (name[1] == 'U')
88c15c34 8361 xsnprintf (result, result_len, "[\"%02x\"]", v);
14f9c5c9 8362 else
88c15c34 8363 xsnprintf (result, result_len, "[\"%04x\"]", v);
14f9c5c9
AS
8364
8365 return result;
8366 }
d2e4a39e 8367 else
4c4b4cd2 8368 {
c3e5cd34
PH
8369 tmp = strstr (name, "__");
8370 if (tmp == NULL)
8371 tmp = strstr (name, "$");
8372 if (tmp != NULL)
4c4b4cd2
PH
8373 {
8374 GROW_VECT (result, result_len, tmp - name + 1);
8375 strncpy (result, name, tmp - name);
8376 result[tmp - name] = '\0';
8377 return result;
8378 }
8379
8380 return name;
8381 }
14f9c5c9
AS
8382}
8383
14f9c5c9
AS
8384/* Evaluate the subexpression of EXP starting at *POS as for
8385 evaluate_type, updating *POS to point just past the evaluated
4c4b4cd2 8386 expression. */
14f9c5c9 8387
d2e4a39e
AS
8388static struct value *
8389evaluate_subexp_type (struct expression *exp, int *pos)
14f9c5c9 8390{
4b27a620 8391 return evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
14f9c5c9
AS
8392}
8393
8394/* If VAL is wrapped in an aligner or subtype wrapper, return the
4c4b4cd2 8395 value it wraps. */
14f9c5c9 8396
d2e4a39e
AS
8397static struct value *
8398unwrap_value (struct value *val)
14f9c5c9 8399{
df407dfe 8400 struct type *type = ada_check_typedef (value_type (val));
5b4ee69b 8401
14f9c5c9
AS
8402 if (ada_is_aligner_type (type))
8403 {
de4d072f 8404 struct value *v = ada_value_struct_elt (val, "F", 0);
df407dfe 8405 struct type *val_type = ada_check_typedef (value_type (v));
5b4ee69b 8406
14f9c5c9 8407 if (ada_type_name (val_type) == NULL)
4c4b4cd2 8408 TYPE_NAME (val_type) = ada_type_name (type);
14f9c5c9
AS
8409
8410 return unwrap_value (v);
8411 }
d2e4a39e 8412 else
14f9c5c9 8413 {
d2e4a39e 8414 struct type *raw_real_type =
61ee279c 8415 ada_check_typedef (ada_get_base_type (type));
d2e4a39e 8416
5bf03f13
JB
8417 /* If there is no parallel XVS or XVE type, then the value is
8418 already unwrapped. Return it without further modification. */
8419 if ((type == raw_real_type)
8420 && ada_find_parallel_type (type, "___XVE") == NULL)
8421 return val;
14f9c5c9 8422
d2e4a39e 8423 return
4c4b4cd2
PH
8424 coerce_unspec_val_to_type
8425 (val, ada_to_fixed_type (raw_real_type, 0,
42ae5230 8426 value_address (val),
1ed6ede0 8427 NULL, 1));
14f9c5c9
AS
8428 }
8429}
d2e4a39e
AS
8430
8431static struct value *
8432cast_to_fixed (struct type *type, struct value *arg)
14f9c5c9
AS
8433{
8434 LONGEST val;
8435
df407dfe 8436 if (type == value_type (arg))
14f9c5c9 8437 return arg;
df407dfe 8438 else if (ada_is_fixed_point_type (value_type (arg)))
d2e4a39e 8439 val = ada_float_to_fixed (type,
df407dfe 8440 ada_fixed_to_float (value_type (arg),
4c4b4cd2 8441 value_as_long (arg)));
d2e4a39e 8442 else
14f9c5c9 8443 {
a53b7a21 8444 DOUBLEST argd = value_as_double (arg);
5b4ee69b 8445
14f9c5c9
AS
8446 val = ada_float_to_fixed (type, argd);
8447 }
8448
8449 return value_from_longest (type, val);
8450}
8451
d2e4a39e 8452static struct value *
a53b7a21 8453cast_from_fixed (struct type *type, struct value *arg)
14f9c5c9 8454{
df407dfe 8455 DOUBLEST val = ada_fixed_to_float (value_type (arg),
4c4b4cd2 8456 value_as_long (arg));
5b4ee69b 8457
a53b7a21 8458 return value_from_double (type, val);
14f9c5c9
AS
8459}
8460
4c4b4cd2
PH
8461/* Coerce VAL as necessary for assignment to an lval of type TYPE, and
8462 return the converted value. */
8463
d2e4a39e
AS
8464static struct value *
8465coerce_for_assign (struct type *type, struct value *val)
14f9c5c9 8466{
df407dfe 8467 struct type *type2 = value_type (val);
5b4ee69b 8468
14f9c5c9
AS
8469 if (type == type2)
8470 return val;
8471
61ee279c
PH
8472 type2 = ada_check_typedef (type2);
8473 type = ada_check_typedef (type);
14f9c5c9 8474
d2e4a39e
AS
8475 if (TYPE_CODE (type2) == TYPE_CODE_PTR
8476 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
14f9c5c9
AS
8477 {
8478 val = ada_value_ind (val);
df407dfe 8479 type2 = value_type (val);
14f9c5c9
AS
8480 }
8481
d2e4a39e 8482 if (TYPE_CODE (type2) == TYPE_CODE_ARRAY
14f9c5c9
AS
8483 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
8484 {
8485 if (TYPE_LENGTH (type2) != TYPE_LENGTH (type)
4c4b4cd2
PH
8486 || TYPE_LENGTH (TYPE_TARGET_TYPE (type2))
8487 != TYPE_LENGTH (TYPE_TARGET_TYPE (type2)))
323e0a4a 8488 error (_("Incompatible types in assignment"));
04624583 8489 deprecated_set_value_type (val, type);
14f9c5c9 8490 }
d2e4a39e 8491 return val;
14f9c5c9
AS
8492}
8493
4c4b4cd2
PH
8494static struct value *
8495ada_value_binop (struct value *arg1, struct value *arg2, enum exp_opcode op)
8496{
8497 struct value *val;
8498 struct type *type1, *type2;
8499 LONGEST v, v1, v2;
8500
994b9211
AC
8501 arg1 = coerce_ref (arg1);
8502 arg2 = coerce_ref (arg2);
18af8284
JB
8503 type1 = get_base_type (ada_check_typedef (value_type (arg1)));
8504 type2 = get_base_type (ada_check_typedef (value_type (arg2)));
4c4b4cd2 8505
76a01679
JB
8506 if (TYPE_CODE (type1) != TYPE_CODE_INT
8507 || TYPE_CODE (type2) != TYPE_CODE_INT)
4c4b4cd2
PH
8508 return value_binop (arg1, arg2, op);
8509
76a01679 8510 switch (op)
4c4b4cd2
PH
8511 {
8512 case BINOP_MOD:
8513 case BINOP_DIV:
8514 case BINOP_REM:
8515 break;
8516 default:
8517 return value_binop (arg1, arg2, op);
8518 }
8519
8520 v2 = value_as_long (arg2);
8521 if (v2 == 0)
323e0a4a 8522 error (_("second operand of %s must not be zero."), op_string (op));
4c4b4cd2
PH
8523
8524 if (TYPE_UNSIGNED (type1) || op == BINOP_MOD)
8525 return value_binop (arg1, arg2, op);
8526
8527 v1 = value_as_long (arg1);
8528 switch (op)
8529 {
8530 case BINOP_DIV:
8531 v = v1 / v2;
76a01679
JB
8532 if (!TRUNCATION_TOWARDS_ZERO && v1 * (v1 % v2) < 0)
8533 v += v > 0 ? -1 : 1;
4c4b4cd2
PH
8534 break;
8535 case BINOP_REM:
8536 v = v1 % v2;
76a01679
JB
8537 if (v * v1 < 0)
8538 v -= v2;
4c4b4cd2
PH
8539 break;
8540 default:
8541 /* Should not reach this point. */
8542 v = 0;
8543 }
8544
8545 val = allocate_value (type1);
990a07ab 8546 store_unsigned_integer (value_contents_raw (val),
e17a4113
UW
8547 TYPE_LENGTH (value_type (val)),
8548 gdbarch_byte_order (get_type_arch (type1)), v);
4c4b4cd2
PH
8549 return val;
8550}
8551
8552static int
8553ada_value_equal (struct value *arg1, struct value *arg2)
8554{
df407dfe
AC
8555 if (ada_is_direct_array_type (value_type (arg1))
8556 || ada_is_direct_array_type (value_type (arg2)))
4c4b4cd2 8557 {
f58b38bf
JB
8558 /* Automatically dereference any array reference before
8559 we attempt to perform the comparison. */
8560 arg1 = ada_coerce_ref (arg1);
8561 arg2 = ada_coerce_ref (arg2);
8562
4c4b4cd2
PH
8563 arg1 = ada_coerce_to_simple_array (arg1);
8564 arg2 = ada_coerce_to_simple_array (arg2);
df407dfe
AC
8565 if (TYPE_CODE (value_type (arg1)) != TYPE_CODE_ARRAY
8566 || TYPE_CODE (value_type (arg2)) != TYPE_CODE_ARRAY)
323e0a4a 8567 error (_("Attempt to compare array with non-array"));
4c4b4cd2 8568 /* FIXME: The following works only for types whose
76a01679
JB
8569 representations use all bits (no padding or undefined bits)
8570 and do not have user-defined equality. */
8571 return
df407dfe 8572 TYPE_LENGTH (value_type (arg1)) == TYPE_LENGTH (value_type (arg2))
0fd88904 8573 && memcmp (value_contents (arg1), value_contents (arg2),
df407dfe 8574 TYPE_LENGTH (value_type (arg1))) == 0;
4c4b4cd2
PH
8575 }
8576 return value_equal (arg1, arg2);
8577}
8578
52ce6436
PH
8579/* Total number of component associations in the aggregate starting at
8580 index PC in EXP. Assumes that index PC is the start of an
0963b4bd 8581 OP_AGGREGATE. */
52ce6436
PH
8582
8583static int
8584num_component_specs (struct expression *exp, int pc)
8585{
8586 int n, m, i;
5b4ee69b 8587
52ce6436
PH
8588 m = exp->elts[pc + 1].longconst;
8589 pc += 3;
8590 n = 0;
8591 for (i = 0; i < m; i += 1)
8592 {
8593 switch (exp->elts[pc].opcode)
8594 {
8595 default:
8596 n += 1;
8597 break;
8598 case OP_CHOICES:
8599 n += exp->elts[pc + 1].longconst;
8600 break;
8601 }
8602 ada_evaluate_subexp (NULL, exp, &pc, EVAL_SKIP);
8603 }
8604 return n;
8605}
8606
8607/* Assign the result of evaluating EXP starting at *POS to the INDEXth
8608 component of LHS (a simple array or a record), updating *POS past
8609 the expression, assuming that LHS is contained in CONTAINER. Does
8610 not modify the inferior's memory, nor does it modify LHS (unless
8611 LHS == CONTAINER). */
8612
8613static void
8614assign_component (struct value *container, struct value *lhs, LONGEST index,
8615 struct expression *exp, int *pos)
8616{
8617 struct value *mark = value_mark ();
8618 struct value *elt;
5b4ee69b 8619
52ce6436
PH
8620 if (TYPE_CODE (value_type (lhs)) == TYPE_CODE_ARRAY)
8621 {
22601c15
UW
8622 struct type *index_type = builtin_type (exp->gdbarch)->builtin_int;
8623 struct value *index_val = value_from_longest (index_type, index);
5b4ee69b 8624
52ce6436
PH
8625 elt = unwrap_value (ada_value_subscript (lhs, 1, &index_val));
8626 }
8627 else
8628 {
8629 elt = ada_index_struct_field (index, lhs, 0, value_type (lhs));
8630 elt = ada_to_fixed_value (unwrap_value (elt));
8631 }
8632
8633 if (exp->elts[*pos].opcode == OP_AGGREGATE)
8634 assign_aggregate (container, elt, exp, pos, EVAL_NORMAL);
8635 else
8636 value_assign_to_component (container, elt,
8637 ada_evaluate_subexp (NULL, exp, pos,
8638 EVAL_NORMAL));
8639
8640 value_free_to_mark (mark);
8641}
8642
8643/* Assuming that LHS represents an lvalue having a record or array
8644 type, and EXP->ELTS[*POS] is an OP_AGGREGATE, evaluate an assignment
8645 of that aggregate's value to LHS, advancing *POS past the
8646 aggregate. NOSIDE is as for evaluate_subexp. CONTAINER is an
8647 lvalue containing LHS (possibly LHS itself). Does not modify
8648 the inferior's memory, nor does it modify the contents of
0963b4bd 8649 LHS (unless == CONTAINER). Returns the modified CONTAINER. */
52ce6436
PH
8650
8651static struct value *
8652assign_aggregate (struct value *container,
8653 struct value *lhs, struct expression *exp,
8654 int *pos, enum noside noside)
8655{
8656 struct type *lhs_type;
8657 int n = exp->elts[*pos+1].longconst;
8658 LONGEST low_index, high_index;
8659 int num_specs;
8660 LONGEST *indices;
8661 int max_indices, num_indices;
8662 int is_array_aggregate;
8663 int i;
52ce6436
PH
8664
8665 *pos += 3;
8666 if (noside != EVAL_NORMAL)
8667 {
52ce6436
PH
8668 for (i = 0; i < n; i += 1)
8669 ada_evaluate_subexp (NULL, exp, pos, noside);
8670 return container;
8671 }
8672
8673 container = ada_coerce_ref (container);
8674 if (ada_is_direct_array_type (value_type (container)))
8675 container = ada_coerce_to_simple_array (container);
8676 lhs = ada_coerce_ref (lhs);
8677 if (!deprecated_value_modifiable (lhs))
8678 error (_("Left operand of assignment is not a modifiable lvalue."));
8679
8680 lhs_type = value_type (lhs);
8681 if (ada_is_direct_array_type (lhs_type))
8682 {
8683 lhs = ada_coerce_to_simple_array (lhs);
8684 lhs_type = value_type (lhs);
8685 low_index = TYPE_ARRAY_LOWER_BOUND_VALUE (lhs_type);
8686 high_index = TYPE_ARRAY_UPPER_BOUND_VALUE (lhs_type);
8687 is_array_aggregate = 1;
8688 }
8689 else if (TYPE_CODE (lhs_type) == TYPE_CODE_STRUCT)
8690 {
8691 low_index = 0;
8692 high_index = num_visible_fields (lhs_type) - 1;
8693 is_array_aggregate = 0;
8694 }
8695 else
8696 error (_("Left-hand side must be array or record."));
8697
8698 num_specs = num_component_specs (exp, *pos - 3);
8699 max_indices = 4 * num_specs + 4;
8700 indices = alloca (max_indices * sizeof (indices[0]));
8701 indices[0] = indices[1] = low_index - 1;
8702 indices[2] = indices[3] = high_index + 1;
8703 num_indices = 4;
8704
8705 for (i = 0; i < n; i += 1)
8706 {
8707 switch (exp->elts[*pos].opcode)
8708 {
8709 case OP_CHOICES:
8710 aggregate_assign_from_choices (container, lhs, exp, pos, indices,
8711 &num_indices, max_indices,
8712 low_index, high_index);
8713 break;
8714 case OP_POSITIONAL:
8715 aggregate_assign_positional (container, lhs, exp, pos, indices,
8716 &num_indices, max_indices,
8717 low_index, high_index);
8718 break;
8719 case OP_OTHERS:
8720 if (i != n-1)
8721 error (_("Misplaced 'others' clause"));
8722 aggregate_assign_others (container, lhs, exp, pos, indices,
8723 num_indices, low_index, high_index);
8724 break;
8725 default:
8726 error (_("Internal error: bad aggregate clause"));
8727 }
8728 }
8729
8730 return container;
8731}
8732
8733/* Assign into the component of LHS indexed by the OP_POSITIONAL
8734 construct at *POS, updating *POS past the construct, given that
8735 the positions are relative to lower bound LOW, where HIGH is the
8736 upper bound. Record the position in INDICES[0 .. MAX_INDICES-1]
8737 updating *NUM_INDICES as needed. CONTAINER is as for
0963b4bd 8738 assign_aggregate. */
52ce6436
PH
8739static void
8740aggregate_assign_positional (struct value *container,
8741 struct value *lhs, struct expression *exp,
8742 int *pos, LONGEST *indices, int *num_indices,
8743 int max_indices, LONGEST low, LONGEST high)
8744{
8745 LONGEST ind = longest_to_int (exp->elts[*pos + 1].longconst) + low;
8746
8747 if (ind - 1 == high)
e1d5a0d2 8748 warning (_("Extra components in aggregate ignored."));
52ce6436
PH
8749 if (ind <= high)
8750 {
8751 add_component_interval (ind, ind, indices, num_indices, max_indices);
8752 *pos += 3;
8753 assign_component (container, lhs, ind, exp, pos);
8754 }
8755 else
8756 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
8757}
8758
8759/* Assign into the components of LHS indexed by the OP_CHOICES
8760 construct at *POS, updating *POS past the construct, given that
8761 the allowable indices are LOW..HIGH. Record the indices assigned
8762 to in INDICES[0 .. MAX_INDICES-1], updating *NUM_INDICES as
0963b4bd 8763 needed. CONTAINER is as for assign_aggregate. */
52ce6436
PH
8764static void
8765aggregate_assign_from_choices (struct value *container,
8766 struct value *lhs, struct expression *exp,
8767 int *pos, LONGEST *indices, int *num_indices,
8768 int max_indices, LONGEST low, LONGEST high)
8769{
8770 int j;
8771 int n_choices = longest_to_int (exp->elts[*pos+1].longconst);
8772 int choice_pos, expr_pc;
8773 int is_array = ada_is_direct_array_type (value_type (lhs));
8774
8775 choice_pos = *pos += 3;
8776
8777 for (j = 0; j < n_choices; j += 1)
8778 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
8779 expr_pc = *pos;
8780 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
8781
8782 for (j = 0; j < n_choices; j += 1)
8783 {
8784 LONGEST lower, upper;
8785 enum exp_opcode op = exp->elts[choice_pos].opcode;
5b4ee69b 8786
52ce6436
PH
8787 if (op == OP_DISCRETE_RANGE)
8788 {
8789 choice_pos += 1;
8790 lower = value_as_long (ada_evaluate_subexp (NULL, exp, pos,
8791 EVAL_NORMAL));
8792 upper = value_as_long (ada_evaluate_subexp (NULL, exp, pos,
8793 EVAL_NORMAL));
8794 }
8795 else if (is_array)
8796 {
8797 lower = value_as_long (ada_evaluate_subexp (NULL, exp, &choice_pos,
8798 EVAL_NORMAL));
8799 upper = lower;
8800 }
8801 else
8802 {
8803 int ind;
8804 char *name;
5b4ee69b 8805
52ce6436
PH
8806 switch (op)
8807 {
8808 case OP_NAME:
8809 name = &exp->elts[choice_pos + 2].string;
8810 break;
8811 case OP_VAR_VALUE:
8812 name = SYMBOL_NATURAL_NAME (exp->elts[choice_pos + 2].symbol);
8813 break;
8814 default:
8815 error (_("Invalid record component association."));
8816 }
8817 ada_evaluate_subexp (NULL, exp, &choice_pos, EVAL_SKIP);
8818 ind = 0;
8819 if (! find_struct_field (name, value_type (lhs), 0,
8820 NULL, NULL, NULL, NULL, &ind))
8821 error (_("Unknown component name: %s."), name);
8822 lower = upper = ind;
8823 }
8824
8825 if (lower <= upper && (lower < low || upper > high))
8826 error (_("Index in component association out of bounds."));
8827
8828 add_component_interval (lower, upper, indices, num_indices,
8829 max_indices);
8830 while (lower <= upper)
8831 {
8832 int pos1;
5b4ee69b 8833
52ce6436
PH
8834 pos1 = expr_pc;
8835 assign_component (container, lhs, lower, exp, &pos1);
8836 lower += 1;
8837 }
8838 }
8839}
8840
8841/* Assign the value of the expression in the OP_OTHERS construct in
8842 EXP at *POS into the components of LHS indexed from LOW .. HIGH that
8843 have not been previously assigned. The index intervals already assigned
8844 are in INDICES[0 .. NUM_INDICES-1]. Updates *POS to after the
0963b4bd 8845 OP_OTHERS clause. CONTAINER is as for assign_aggregate. */
52ce6436
PH
8846static void
8847aggregate_assign_others (struct value *container,
8848 struct value *lhs, struct expression *exp,
8849 int *pos, LONGEST *indices, int num_indices,
8850 LONGEST low, LONGEST high)
8851{
8852 int i;
5ce64950 8853 int expr_pc = *pos + 1;
52ce6436
PH
8854
8855 for (i = 0; i < num_indices - 2; i += 2)
8856 {
8857 LONGEST ind;
5b4ee69b 8858
52ce6436
PH
8859 for (ind = indices[i + 1] + 1; ind < indices[i + 2]; ind += 1)
8860 {
5ce64950 8861 int localpos;
5b4ee69b 8862
5ce64950
MS
8863 localpos = expr_pc;
8864 assign_component (container, lhs, ind, exp, &localpos);
52ce6436
PH
8865 }
8866 }
8867 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
8868}
8869
8870/* Add the interval [LOW .. HIGH] to the sorted set of intervals
8871 [ INDICES[0] .. INDICES[1] ],..., [ INDICES[*SIZE-2] .. INDICES[*SIZE-1] ],
8872 modifying *SIZE as needed. It is an error if *SIZE exceeds
8873 MAX_SIZE. The resulting intervals do not overlap. */
8874static void
8875add_component_interval (LONGEST low, LONGEST high,
8876 LONGEST* indices, int *size, int max_size)
8877{
8878 int i, j;
5b4ee69b 8879
52ce6436
PH
8880 for (i = 0; i < *size; i += 2) {
8881 if (high >= indices[i] && low <= indices[i + 1])
8882 {
8883 int kh;
5b4ee69b 8884
52ce6436
PH
8885 for (kh = i + 2; kh < *size; kh += 2)
8886 if (high < indices[kh])
8887 break;
8888 if (low < indices[i])
8889 indices[i] = low;
8890 indices[i + 1] = indices[kh - 1];
8891 if (high > indices[i + 1])
8892 indices[i + 1] = high;
8893 memcpy (indices + i + 2, indices + kh, *size - kh);
8894 *size -= kh - i - 2;
8895 return;
8896 }
8897 else if (high < indices[i])
8898 break;
8899 }
8900
8901 if (*size == max_size)
8902 error (_("Internal error: miscounted aggregate components."));
8903 *size += 2;
8904 for (j = *size-1; j >= i+2; j -= 1)
8905 indices[j] = indices[j - 2];
8906 indices[i] = low;
8907 indices[i + 1] = high;
8908}
8909
6e48bd2c
JB
8910/* Perform and Ada cast of ARG2 to type TYPE if the type of ARG2
8911 is different. */
8912
8913static struct value *
8914ada_value_cast (struct type *type, struct value *arg2, enum noside noside)
8915{
8916 if (type == ada_check_typedef (value_type (arg2)))
8917 return arg2;
8918
8919 if (ada_is_fixed_point_type (type))
8920 return (cast_to_fixed (type, arg2));
8921
8922 if (ada_is_fixed_point_type (value_type (arg2)))
a53b7a21 8923 return cast_from_fixed (type, arg2);
6e48bd2c
JB
8924
8925 return value_cast (type, arg2);
8926}
8927
284614f0
JB
8928/* Evaluating Ada expressions, and printing their result.
8929 ------------------------------------------------------
8930
21649b50
JB
8931 1. Introduction:
8932 ----------------
8933
284614f0
JB
8934 We usually evaluate an Ada expression in order to print its value.
8935 We also evaluate an expression in order to print its type, which
8936 happens during the EVAL_AVOID_SIDE_EFFECTS phase of the evaluation,
8937 but we'll focus mostly on the EVAL_NORMAL phase. In practice, the
8938 EVAL_AVOID_SIDE_EFFECTS phase allows us to simplify certain aspects of
8939 the evaluation compared to the EVAL_NORMAL, but is otherwise very
8940 similar.
8941
8942 Evaluating expressions is a little more complicated for Ada entities
8943 than it is for entities in languages such as C. The main reason for
8944 this is that Ada provides types whose definition might be dynamic.
8945 One example of such types is variant records. Or another example
8946 would be an array whose bounds can only be known at run time.
8947
8948 The following description is a general guide as to what should be
8949 done (and what should NOT be done) in order to evaluate an expression
8950 involving such types, and when. This does not cover how the semantic
8951 information is encoded by GNAT as this is covered separatly. For the
8952 document used as the reference for the GNAT encoding, see exp_dbug.ads
8953 in the GNAT sources.
8954
8955 Ideally, we should embed each part of this description next to its
8956 associated code. Unfortunately, the amount of code is so vast right
8957 now that it's hard to see whether the code handling a particular
8958 situation might be duplicated or not. One day, when the code is
8959 cleaned up, this guide might become redundant with the comments
8960 inserted in the code, and we might want to remove it.
8961
21649b50
JB
8962 2. ``Fixing'' an Entity, the Simple Case:
8963 -----------------------------------------
8964
284614f0
JB
8965 When evaluating Ada expressions, the tricky issue is that they may
8966 reference entities whose type contents and size are not statically
8967 known. Consider for instance a variant record:
8968
8969 type Rec (Empty : Boolean := True) is record
8970 case Empty is
8971 when True => null;
8972 when False => Value : Integer;
8973 end case;
8974 end record;
8975 Yes : Rec := (Empty => False, Value => 1);
8976 No : Rec := (empty => True);
8977
8978 The size and contents of that record depends on the value of the
8979 descriminant (Rec.Empty). At this point, neither the debugging
8980 information nor the associated type structure in GDB are able to
8981 express such dynamic types. So what the debugger does is to create
8982 "fixed" versions of the type that applies to the specific object.
8983 We also informally refer to this opperation as "fixing" an object,
8984 which means creating its associated fixed type.
8985
8986 Example: when printing the value of variable "Yes" above, its fixed
8987 type would look like this:
8988
8989 type Rec is record
8990 Empty : Boolean;
8991 Value : Integer;
8992 end record;
8993
8994 On the other hand, if we printed the value of "No", its fixed type
8995 would become:
8996
8997 type Rec is record
8998 Empty : Boolean;
8999 end record;
9000
9001 Things become a little more complicated when trying to fix an entity
9002 with a dynamic type that directly contains another dynamic type,
9003 such as an array of variant records, for instance. There are
9004 two possible cases: Arrays, and records.
9005
21649b50
JB
9006 3. ``Fixing'' Arrays:
9007 ---------------------
9008
9009 The type structure in GDB describes an array in terms of its bounds,
9010 and the type of its elements. By design, all elements in the array
9011 have the same type and we cannot represent an array of variant elements
9012 using the current type structure in GDB. When fixing an array,
9013 we cannot fix the array element, as we would potentially need one
9014 fixed type per element of the array. As a result, the best we can do
9015 when fixing an array is to produce an array whose bounds and size
9016 are correct (allowing us to read it from memory), but without having
9017 touched its element type. Fixing each element will be done later,
9018 when (if) necessary.
9019
9020 Arrays are a little simpler to handle than records, because the same
9021 amount of memory is allocated for each element of the array, even if
1b536f04 9022 the amount of space actually used by each element differs from element
21649b50 9023 to element. Consider for instance the following array of type Rec:
284614f0
JB
9024
9025 type Rec_Array is array (1 .. 2) of Rec;
9026
1b536f04
JB
9027 The actual amount of memory occupied by each element might be different
9028 from element to element, depending on the value of their discriminant.
21649b50 9029 But the amount of space reserved for each element in the array remains
1b536f04 9030 fixed regardless. So we simply need to compute that size using
21649b50
JB
9031 the debugging information available, from which we can then determine
9032 the array size (we multiply the number of elements of the array by
9033 the size of each element).
9034
9035 The simplest case is when we have an array of a constrained element
9036 type. For instance, consider the following type declarations:
9037
9038 type Bounded_String (Max_Size : Integer) is
9039 Length : Integer;
9040 Buffer : String (1 .. Max_Size);
9041 end record;
9042 type Bounded_String_Array is array (1 ..2) of Bounded_String (80);
9043
9044 In this case, the compiler describes the array as an array of
9045 variable-size elements (identified by its XVS suffix) for which
9046 the size can be read in the parallel XVZ variable.
9047
9048 In the case of an array of an unconstrained element type, the compiler
9049 wraps the array element inside a private PAD type. This type should not
9050 be shown to the user, and must be "unwrap"'ed before printing. Note
284614f0
JB
9051 that we also use the adjective "aligner" in our code to designate
9052 these wrapper types.
9053
1b536f04 9054 In some cases, the size allocated for each element is statically
21649b50
JB
9055 known. In that case, the PAD type already has the correct size,
9056 and the array element should remain unfixed.
9057
9058 But there are cases when this size is not statically known.
9059 For instance, assuming that "Five" is an integer variable:
284614f0
JB
9060
9061 type Dynamic is array (1 .. Five) of Integer;
9062 type Wrapper (Has_Length : Boolean := False) is record
9063 Data : Dynamic;
9064 case Has_Length is
9065 when True => Length : Integer;
9066 when False => null;
9067 end case;
9068 end record;
9069 type Wrapper_Array is array (1 .. 2) of Wrapper;
9070
9071 Hello : Wrapper_Array := (others => (Has_Length => True,
9072 Data => (others => 17),
9073 Length => 1));
9074
9075
9076 The debugging info would describe variable Hello as being an
9077 array of a PAD type. The size of that PAD type is not statically
9078 known, but can be determined using a parallel XVZ variable.
9079 In that case, a copy of the PAD type with the correct size should
9080 be used for the fixed array.
9081
21649b50
JB
9082 3. ``Fixing'' record type objects:
9083 ----------------------------------
9084
9085 Things are slightly different from arrays in the case of dynamic
284614f0
JB
9086 record types. In this case, in order to compute the associated
9087 fixed type, we need to determine the size and offset of each of
9088 its components. This, in turn, requires us to compute the fixed
9089 type of each of these components.
9090
9091 Consider for instance the example:
9092
9093 type Bounded_String (Max_Size : Natural) is record
9094 Str : String (1 .. Max_Size);
9095 Length : Natural;
9096 end record;
9097 My_String : Bounded_String (Max_Size => 10);
9098
9099 In that case, the position of field "Length" depends on the size
9100 of field Str, which itself depends on the value of the Max_Size
21649b50 9101 discriminant. In order to fix the type of variable My_String,
284614f0
JB
9102 we need to fix the type of field Str. Therefore, fixing a variant
9103 record requires us to fix each of its components.
9104
9105 However, if a component does not have a dynamic size, the component
9106 should not be fixed. In particular, fields that use a PAD type
9107 should not fixed. Here is an example where this might happen
9108 (assuming type Rec above):
9109
9110 type Container (Big : Boolean) is record
9111 First : Rec;
9112 After : Integer;
9113 case Big is
9114 when True => Another : Integer;
9115 when False => null;
9116 end case;
9117 end record;
9118 My_Container : Container := (Big => False,
9119 First => (Empty => True),
9120 After => 42);
9121
9122 In that example, the compiler creates a PAD type for component First,
9123 whose size is constant, and then positions the component After just
9124 right after it. The offset of component After is therefore constant
9125 in this case.
9126
9127 The debugger computes the position of each field based on an algorithm
9128 that uses, among other things, the actual position and size of the field
21649b50
JB
9129 preceding it. Let's now imagine that the user is trying to print
9130 the value of My_Container. If the type fixing was recursive, we would
284614f0
JB
9131 end up computing the offset of field After based on the size of the
9132 fixed version of field First. And since in our example First has
9133 only one actual field, the size of the fixed type is actually smaller
9134 than the amount of space allocated to that field, and thus we would
9135 compute the wrong offset of field After.
9136
21649b50
JB
9137 To make things more complicated, we need to watch out for dynamic
9138 components of variant records (identified by the ___XVL suffix in
9139 the component name). Even if the target type is a PAD type, the size
9140 of that type might not be statically known. So the PAD type needs
9141 to be unwrapped and the resulting type needs to be fixed. Otherwise,
9142 we might end up with the wrong size for our component. This can be
9143 observed with the following type declarations:
284614f0
JB
9144
9145 type Octal is new Integer range 0 .. 7;
9146 type Octal_Array is array (Positive range <>) of Octal;
9147 pragma Pack (Octal_Array);
9148
9149 type Octal_Buffer (Size : Positive) is record
9150 Buffer : Octal_Array (1 .. Size);
9151 Length : Integer;
9152 end record;
9153
9154 In that case, Buffer is a PAD type whose size is unset and needs
9155 to be computed by fixing the unwrapped type.
9156
21649b50
JB
9157 4. When to ``Fix'' un-``Fixed'' sub-elements of an entity:
9158 ----------------------------------------------------------
9159
9160 Lastly, when should the sub-elements of an entity that remained unfixed
284614f0
JB
9161 thus far, be actually fixed?
9162
9163 The answer is: Only when referencing that element. For instance
9164 when selecting one component of a record, this specific component
9165 should be fixed at that point in time. Or when printing the value
9166 of a record, each component should be fixed before its value gets
9167 printed. Similarly for arrays, the element of the array should be
9168 fixed when printing each element of the array, or when extracting
9169 one element out of that array. On the other hand, fixing should
9170 not be performed on the elements when taking a slice of an array!
9171
9172 Note that one of the side-effects of miscomputing the offset and
9173 size of each field is that we end up also miscomputing the size
9174 of the containing type. This can have adverse results when computing
9175 the value of an entity. GDB fetches the value of an entity based
9176 on the size of its type, and thus a wrong size causes GDB to fetch
9177 the wrong amount of memory. In the case where the computed size is
9178 too small, GDB fetches too little data to print the value of our
9179 entiry. Results in this case as unpredicatble, as we usually read
9180 past the buffer containing the data =:-o. */
9181
9182/* Implement the evaluate_exp routine in the exp_descriptor structure
9183 for the Ada language. */
9184
52ce6436 9185static struct value *
ebf56fd3 9186ada_evaluate_subexp (struct type *expect_type, struct expression *exp,
4c4b4cd2 9187 int *pos, enum noside noside)
14f9c5c9
AS
9188{
9189 enum exp_opcode op;
b5385fc0 9190 int tem;
14f9c5c9
AS
9191 int pc;
9192 struct value *arg1 = NULL, *arg2 = NULL, *arg3;
9193 struct type *type;
52ce6436 9194 int nargs, oplen;
d2e4a39e 9195 struct value **argvec;
14f9c5c9 9196
d2e4a39e
AS
9197 pc = *pos;
9198 *pos += 1;
14f9c5c9
AS
9199 op = exp->elts[pc].opcode;
9200
d2e4a39e 9201 switch (op)
14f9c5c9
AS
9202 {
9203 default:
9204 *pos -= 1;
6e48bd2c
JB
9205 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
9206 arg1 = unwrap_value (arg1);
9207
9208 /* If evaluating an OP_DOUBLE and an EXPECT_TYPE was provided,
9209 then we need to perform the conversion manually, because
9210 evaluate_subexp_standard doesn't do it. This conversion is
9211 necessary in Ada because the different kinds of float/fixed
9212 types in Ada have different representations.
9213
9214 Similarly, we need to perform the conversion from OP_LONG
9215 ourselves. */
9216 if ((op == OP_DOUBLE || op == OP_LONG) && expect_type != NULL)
9217 arg1 = ada_value_cast (expect_type, arg1, noside);
9218
9219 return arg1;
4c4b4cd2
PH
9220
9221 case OP_STRING:
9222 {
76a01679 9223 struct value *result;
5b4ee69b 9224
76a01679
JB
9225 *pos -= 1;
9226 result = evaluate_subexp_standard (expect_type, exp, pos, noside);
9227 /* The result type will have code OP_STRING, bashed there from
9228 OP_ARRAY. Bash it back. */
df407dfe
AC
9229 if (TYPE_CODE (value_type (result)) == TYPE_CODE_STRING)
9230 TYPE_CODE (value_type (result)) = TYPE_CODE_ARRAY;
76a01679 9231 return result;
4c4b4cd2 9232 }
14f9c5c9
AS
9233
9234 case UNOP_CAST:
9235 (*pos) += 2;
9236 type = exp->elts[pc + 1].type;
9237 arg1 = evaluate_subexp (type, exp, pos, noside);
9238 if (noside == EVAL_SKIP)
4c4b4cd2 9239 goto nosideret;
6e48bd2c 9240 arg1 = ada_value_cast (type, arg1, noside);
14f9c5c9
AS
9241 return arg1;
9242
4c4b4cd2
PH
9243 case UNOP_QUAL:
9244 (*pos) += 2;
9245 type = exp->elts[pc + 1].type;
9246 return ada_evaluate_subexp (type, exp, pos, noside);
9247
14f9c5c9
AS
9248 case BINOP_ASSIGN:
9249 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
52ce6436
PH
9250 if (exp->elts[*pos].opcode == OP_AGGREGATE)
9251 {
9252 arg1 = assign_aggregate (arg1, arg1, exp, pos, noside);
9253 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
9254 return arg1;
9255 return ada_value_assign (arg1, arg1);
9256 }
003f3813
JB
9257 /* Force the evaluation of the rhs ARG2 to the type of the lhs ARG1,
9258 except if the lhs of our assignment is a convenience variable.
9259 In the case of assigning to a convenience variable, the lhs
9260 should be exactly the result of the evaluation of the rhs. */
9261 type = value_type (arg1);
9262 if (VALUE_LVAL (arg1) == lval_internalvar)
9263 type = NULL;
9264 arg2 = evaluate_subexp (type, exp, pos, noside);
14f9c5c9 9265 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
4c4b4cd2 9266 return arg1;
df407dfe
AC
9267 if (ada_is_fixed_point_type (value_type (arg1)))
9268 arg2 = cast_to_fixed (value_type (arg1), arg2);
9269 else if (ada_is_fixed_point_type (value_type (arg2)))
76a01679 9270 error
323e0a4a 9271 (_("Fixed-point values must be assigned to fixed-point variables"));
d2e4a39e 9272 else
df407dfe 9273 arg2 = coerce_for_assign (value_type (arg1), arg2);
4c4b4cd2 9274 return ada_value_assign (arg1, arg2);
14f9c5c9
AS
9275
9276 case BINOP_ADD:
9277 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
9278 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
9279 if (noside == EVAL_SKIP)
4c4b4cd2 9280 goto nosideret;
2ac8a782
JB
9281 if (TYPE_CODE (value_type (arg1)) == TYPE_CODE_PTR)
9282 return (value_from_longest
9283 (value_type (arg1),
9284 value_as_long (arg1) + value_as_long (arg2)));
df407dfe
AC
9285 if ((ada_is_fixed_point_type (value_type (arg1))
9286 || ada_is_fixed_point_type (value_type (arg2)))
9287 && value_type (arg1) != value_type (arg2))
323e0a4a 9288 error (_("Operands of fixed-point addition must have the same type"));
b7789565
JB
9289 /* Do the addition, and cast the result to the type of the first
9290 argument. We cannot cast the result to a reference type, so if
9291 ARG1 is a reference type, find its underlying type. */
9292 type = value_type (arg1);
9293 while (TYPE_CODE (type) == TYPE_CODE_REF)
9294 type = TYPE_TARGET_TYPE (type);
f44316fa 9295 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
89eef114 9296 return value_cast (type, value_binop (arg1, arg2, BINOP_ADD));
14f9c5c9
AS
9297
9298 case BINOP_SUB:
9299 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
9300 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
9301 if (noside == EVAL_SKIP)
4c4b4cd2 9302 goto nosideret;
2ac8a782
JB
9303 if (TYPE_CODE (value_type (arg1)) == TYPE_CODE_PTR)
9304 return (value_from_longest
9305 (value_type (arg1),
9306 value_as_long (arg1) - value_as_long (arg2)));
df407dfe
AC
9307 if ((ada_is_fixed_point_type (value_type (arg1))
9308 || ada_is_fixed_point_type (value_type (arg2)))
9309 && value_type (arg1) != value_type (arg2))
0963b4bd
MS
9310 error (_("Operands of fixed-point subtraction "
9311 "must have the same type"));
b7789565
JB
9312 /* Do the substraction, and cast the result to the type of the first
9313 argument. We cannot cast the result to a reference type, so if
9314 ARG1 is a reference type, find its underlying type. */
9315 type = value_type (arg1);
9316 while (TYPE_CODE (type) == TYPE_CODE_REF)
9317 type = TYPE_TARGET_TYPE (type);
f44316fa 9318 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
89eef114 9319 return value_cast (type, value_binop (arg1, arg2, BINOP_SUB));
14f9c5c9
AS
9320
9321 case BINOP_MUL:
9322 case BINOP_DIV:
e1578042
JB
9323 case BINOP_REM:
9324 case BINOP_MOD:
14f9c5c9
AS
9325 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9326 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9327 if (noside == EVAL_SKIP)
4c4b4cd2 9328 goto nosideret;
e1578042 9329 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
9c2be529
JB
9330 {
9331 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
9332 return value_zero (value_type (arg1), not_lval);
9333 }
14f9c5c9 9334 else
4c4b4cd2 9335 {
a53b7a21 9336 type = builtin_type (exp->gdbarch)->builtin_double;
df407dfe 9337 if (ada_is_fixed_point_type (value_type (arg1)))
a53b7a21 9338 arg1 = cast_from_fixed (type, arg1);
df407dfe 9339 if (ada_is_fixed_point_type (value_type (arg2)))
a53b7a21 9340 arg2 = cast_from_fixed (type, arg2);
f44316fa 9341 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
4c4b4cd2
PH
9342 return ada_value_binop (arg1, arg2, op);
9343 }
9344
4c4b4cd2
PH
9345 case BINOP_EQUAL:
9346 case BINOP_NOTEQUAL:
14f9c5c9 9347 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
df407dfe 9348 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
14f9c5c9 9349 if (noside == EVAL_SKIP)
76a01679 9350 goto nosideret;
4c4b4cd2 9351 if (noside == EVAL_AVOID_SIDE_EFFECTS)
76a01679 9352 tem = 0;
4c4b4cd2 9353 else
f44316fa
UW
9354 {
9355 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
9356 tem = ada_value_equal (arg1, arg2);
9357 }
4c4b4cd2 9358 if (op == BINOP_NOTEQUAL)
76a01679 9359 tem = !tem;
fbb06eb1
UW
9360 type = language_bool_type (exp->language_defn, exp->gdbarch);
9361 return value_from_longest (type, (LONGEST) tem);
4c4b4cd2
PH
9362
9363 case UNOP_NEG:
9364 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9365 if (noside == EVAL_SKIP)
9366 goto nosideret;
df407dfe
AC
9367 else if (ada_is_fixed_point_type (value_type (arg1)))
9368 return value_cast (value_type (arg1), value_neg (arg1));
14f9c5c9 9369 else
f44316fa
UW
9370 {
9371 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
9372 return value_neg (arg1);
9373 }
4c4b4cd2 9374
2330c6c6
JB
9375 case BINOP_LOGICAL_AND:
9376 case BINOP_LOGICAL_OR:
9377 case UNOP_LOGICAL_NOT:
000d5124
JB
9378 {
9379 struct value *val;
9380
9381 *pos -= 1;
9382 val = evaluate_subexp_standard (expect_type, exp, pos, noside);
fbb06eb1
UW
9383 type = language_bool_type (exp->language_defn, exp->gdbarch);
9384 return value_cast (type, val);
000d5124 9385 }
2330c6c6
JB
9386
9387 case BINOP_BITWISE_AND:
9388 case BINOP_BITWISE_IOR:
9389 case BINOP_BITWISE_XOR:
000d5124
JB
9390 {
9391 struct value *val;
9392
9393 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
9394 *pos = pc;
9395 val = evaluate_subexp_standard (expect_type, exp, pos, noside);
9396
9397 return value_cast (value_type (arg1), val);
9398 }
2330c6c6 9399
14f9c5c9
AS
9400 case OP_VAR_VALUE:
9401 *pos -= 1;
6799def4 9402
14f9c5c9 9403 if (noside == EVAL_SKIP)
4c4b4cd2
PH
9404 {
9405 *pos += 4;
9406 goto nosideret;
9407 }
9408 else if (SYMBOL_DOMAIN (exp->elts[pc + 2].symbol) == UNDEF_DOMAIN)
76a01679
JB
9409 /* Only encountered when an unresolved symbol occurs in a
9410 context other than a function call, in which case, it is
52ce6436 9411 invalid. */
323e0a4a 9412 error (_("Unexpected unresolved symbol, %s, during evaluation"),
4c4b4cd2 9413 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
14f9c5c9 9414 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
4c4b4cd2 9415 {
0c1f74cf 9416 type = static_unwrap_type (SYMBOL_TYPE (exp->elts[pc + 2].symbol));
31dbc1c5
JB
9417 /* Check to see if this is a tagged type. We also need to handle
9418 the case where the type is a reference to a tagged type, but
9419 we have to be careful to exclude pointers to tagged types.
9420 The latter should be shown as usual (as a pointer), whereas
9421 a reference should mostly be transparent to the user. */
9422 if (ada_is_tagged_type (type, 0)
9423 || (TYPE_CODE(type) == TYPE_CODE_REF
9424 && ada_is_tagged_type (TYPE_TARGET_TYPE (type), 0)))
0c1f74cf
JB
9425 {
9426 /* Tagged types are a little special in the fact that the real
9427 type is dynamic and can only be determined by inspecting the
9428 object's tag. This means that we need to get the object's
9429 value first (EVAL_NORMAL) and then extract the actual object
9430 type from its tag.
9431
9432 Note that we cannot skip the final step where we extract
9433 the object type from its tag, because the EVAL_NORMAL phase
9434 results in dynamic components being resolved into fixed ones.
9435 This can cause problems when trying to print the type
9436 description of tagged types whose parent has a dynamic size:
9437 We use the type name of the "_parent" component in order
9438 to print the name of the ancestor type in the type description.
9439 If that component had a dynamic size, the resolution into
9440 a fixed type would result in the loss of that type name,
9441 thus preventing us from printing the name of the ancestor
9442 type in the type description. */
b79819ba
JB
9443 struct type *actual_type;
9444
0c1f74cf 9445 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL);
b79819ba
JB
9446 actual_type = type_from_tag (ada_value_tag (arg1));
9447 if (actual_type == NULL)
9448 /* If, for some reason, we were unable to determine
9449 the actual type from the tag, then use the static
9450 approximation that we just computed as a fallback.
9451 This can happen if the debugging information is
9452 incomplete, for instance. */
9453 actual_type = type;
9454
9455 return value_zero (actual_type, not_lval);
0c1f74cf
JB
9456 }
9457
4c4b4cd2
PH
9458 *pos += 4;
9459 return value_zero
9460 (to_static_fixed_type
9461 (static_unwrap_type (SYMBOL_TYPE (exp->elts[pc + 2].symbol))),
9462 not_lval);
9463 }
d2e4a39e 9464 else
4c4b4cd2 9465 {
284614f0
JB
9466 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
9467 arg1 = unwrap_value (arg1);
4c4b4cd2
PH
9468 return ada_to_fixed_value (arg1);
9469 }
9470
9471 case OP_FUNCALL:
9472 (*pos) += 2;
9473
9474 /* Allocate arg vector, including space for the function to be
9475 called in argvec[0] and a terminating NULL. */
9476 nargs = longest_to_int (exp->elts[pc + 1].longconst);
9477 argvec =
9478 (struct value **) alloca (sizeof (struct value *) * (nargs + 2));
9479
9480 if (exp->elts[*pos].opcode == OP_VAR_VALUE
76a01679 9481 && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN)
323e0a4a 9482 error (_("Unexpected unresolved symbol, %s, during evaluation"),
4c4b4cd2
PH
9483 SYMBOL_PRINT_NAME (exp->elts[pc + 5].symbol));
9484 else
9485 {
9486 for (tem = 0; tem <= nargs; tem += 1)
9487 argvec[tem] = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9488 argvec[tem] = 0;
9489
9490 if (noside == EVAL_SKIP)
9491 goto nosideret;
9492 }
9493
ad82864c
JB
9494 if (ada_is_constrained_packed_array_type
9495 (desc_base_type (value_type (argvec[0]))))
4c4b4cd2 9496 argvec[0] = ada_coerce_to_simple_array (argvec[0]);
284614f0
JB
9497 else if (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_ARRAY
9498 && TYPE_FIELD_BITSIZE (value_type (argvec[0]), 0) != 0)
9499 /* This is a packed array that has already been fixed, and
9500 therefore already coerced to a simple array. Nothing further
9501 to do. */
9502 ;
df407dfe
AC
9503 else if (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_REF
9504 || (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_ARRAY
76a01679 9505 && VALUE_LVAL (argvec[0]) == lval_memory))
4c4b4cd2
PH
9506 argvec[0] = value_addr (argvec[0]);
9507
df407dfe 9508 type = ada_check_typedef (value_type (argvec[0]));
720d1a40
JB
9509
9510 /* Ada allows us to implicitly dereference arrays when subscripting
8f465ea7
JB
9511 them. So, if this is an array typedef (encoding use for array
9512 access types encoded as fat pointers), strip it now. */
720d1a40
JB
9513 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
9514 type = ada_typedef_target_type (type);
9515
4c4b4cd2
PH
9516 if (TYPE_CODE (type) == TYPE_CODE_PTR)
9517 {
61ee279c 9518 switch (TYPE_CODE (ada_check_typedef (TYPE_TARGET_TYPE (type))))
4c4b4cd2
PH
9519 {
9520 case TYPE_CODE_FUNC:
61ee279c 9521 type = ada_check_typedef (TYPE_TARGET_TYPE (type));
4c4b4cd2
PH
9522 break;
9523 case TYPE_CODE_ARRAY:
9524 break;
9525 case TYPE_CODE_STRUCT:
9526 if (noside != EVAL_AVOID_SIDE_EFFECTS)
9527 argvec[0] = ada_value_ind (argvec[0]);
61ee279c 9528 type = ada_check_typedef (TYPE_TARGET_TYPE (type));
4c4b4cd2
PH
9529 break;
9530 default:
323e0a4a 9531 error (_("cannot subscript or call something of type `%s'"),
df407dfe 9532 ada_type_name (value_type (argvec[0])));
4c4b4cd2
PH
9533 break;
9534 }
9535 }
9536
9537 switch (TYPE_CODE (type))
9538 {
9539 case TYPE_CODE_FUNC:
9540 if (noside == EVAL_AVOID_SIDE_EFFECTS)
9541 return allocate_value (TYPE_TARGET_TYPE (type));
9542 return call_function_by_hand (argvec[0], nargs, argvec + 1);
9543 case TYPE_CODE_STRUCT:
9544 {
9545 int arity;
9546
4c4b4cd2
PH
9547 arity = ada_array_arity (type);
9548 type = ada_array_element_type (type, nargs);
9549 if (type == NULL)
323e0a4a 9550 error (_("cannot subscript or call a record"));
4c4b4cd2 9551 if (arity != nargs)
323e0a4a 9552 error (_("wrong number of subscripts; expecting %d"), arity);
4c4b4cd2 9553 if (noside == EVAL_AVOID_SIDE_EFFECTS)
0a07e705 9554 return value_zero (ada_aligned_type (type), lval_memory);
4c4b4cd2
PH
9555 return
9556 unwrap_value (ada_value_subscript
9557 (argvec[0], nargs, argvec + 1));
9558 }
9559 case TYPE_CODE_ARRAY:
9560 if (noside == EVAL_AVOID_SIDE_EFFECTS)
9561 {
9562 type = ada_array_element_type (type, nargs);
9563 if (type == NULL)
323e0a4a 9564 error (_("element type of array unknown"));
4c4b4cd2 9565 else
0a07e705 9566 return value_zero (ada_aligned_type (type), lval_memory);
4c4b4cd2
PH
9567 }
9568 return
9569 unwrap_value (ada_value_subscript
9570 (ada_coerce_to_simple_array (argvec[0]),
9571 nargs, argvec + 1));
9572 case TYPE_CODE_PTR: /* Pointer to array */
9573 type = to_fixed_array_type (TYPE_TARGET_TYPE (type), NULL, 1);
9574 if (noside == EVAL_AVOID_SIDE_EFFECTS)
9575 {
9576 type = ada_array_element_type (type, nargs);
9577 if (type == NULL)
323e0a4a 9578 error (_("element type of array unknown"));
4c4b4cd2 9579 else
0a07e705 9580 return value_zero (ada_aligned_type (type), lval_memory);
4c4b4cd2
PH
9581 }
9582 return
9583 unwrap_value (ada_value_ptr_subscript (argvec[0], type,
9584 nargs, argvec + 1));
9585
9586 default:
e1d5a0d2
PH
9587 error (_("Attempt to index or call something other than an "
9588 "array or function"));
4c4b4cd2
PH
9589 }
9590
9591 case TERNOP_SLICE:
9592 {
9593 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9594 struct value *low_bound_val =
9595 evaluate_subexp (NULL_TYPE, exp, pos, noside);
714e53ab
PH
9596 struct value *high_bound_val =
9597 evaluate_subexp (NULL_TYPE, exp, pos, noside);
9598 LONGEST low_bound;
9599 LONGEST high_bound;
5b4ee69b 9600
994b9211
AC
9601 low_bound_val = coerce_ref (low_bound_val);
9602 high_bound_val = coerce_ref (high_bound_val);
714e53ab
PH
9603 low_bound = pos_atr (low_bound_val);
9604 high_bound = pos_atr (high_bound_val);
963a6417 9605
4c4b4cd2
PH
9606 if (noside == EVAL_SKIP)
9607 goto nosideret;
9608
4c4b4cd2
PH
9609 /* If this is a reference to an aligner type, then remove all
9610 the aligners. */
df407dfe
AC
9611 if (TYPE_CODE (value_type (array)) == TYPE_CODE_REF
9612 && ada_is_aligner_type (TYPE_TARGET_TYPE (value_type (array))))
9613 TYPE_TARGET_TYPE (value_type (array)) =
9614 ada_aligned_type (TYPE_TARGET_TYPE (value_type (array)));
4c4b4cd2 9615
ad82864c 9616 if (ada_is_constrained_packed_array_type (value_type (array)))
323e0a4a 9617 error (_("cannot slice a packed array"));
4c4b4cd2
PH
9618
9619 /* If this is a reference to an array or an array lvalue,
9620 convert to a pointer. */
df407dfe
AC
9621 if (TYPE_CODE (value_type (array)) == TYPE_CODE_REF
9622 || (TYPE_CODE (value_type (array)) == TYPE_CODE_ARRAY
4c4b4cd2
PH
9623 && VALUE_LVAL (array) == lval_memory))
9624 array = value_addr (array);
9625
1265e4aa 9626 if (noside == EVAL_AVOID_SIDE_EFFECTS
61ee279c 9627 && ada_is_array_descriptor_type (ada_check_typedef
df407dfe 9628 (value_type (array))))
0b5d8877 9629 return empty_array (ada_type_of_array (array, 0), low_bound);
4c4b4cd2
PH
9630
9631 array = ada_coerce_to_simple_array_ptr (array);
9632
714e53ab
PH
9633 /* If we have more than one level of pointer indirection,
9634 dereference the value until we get only one level. */
df407dfe
AC
9635 while (TYPE_CODE (value_type (array)) == TYPE_CODE_PTR
9636 && (TYPE_CODE (TYPE_TARGET_TYPE (value_type (array)))
714e53ab
PH
9637 == TYPE_CODE_PTR))
9638 array = value_ind (array);
9639
9640 /* Make sure we really do have an array type before going further,
9641 to avoid a SEGV when trying to get the index type or the target
9642 type later down the road if the debug info generated by
9643 the compiler is incorrect or incomplete. */
df407dfe 9644 if (!ada_is_simple_array_type (value_type (array)))
323e0a4a 9645 error (_("cannot take slice of non-array"));
714e53ab 9646
828292f2
JB
9647 if (TYPE_CODE (ada_check_typedef (value_type (array)))
9648 == TYPE_CODE_PTR)
4c4b4cd2 9649 {
828292f2
JB
9650 struct type *type0 = ada_check_typedef (value_type (array));
9651
0b5d8877 9652 if (high_bound < low_bound || noside == EVAL_AVOID_SIDE_EFFECTS)
828292f2 9653 return empty_array (TYPE_TARGET_TYPE (type0), low_bound);
4c4b4cd2
PH
9654 else
9655 {
9656 struct type *arr_type0 =
828292f2 9657 to_fixed_array_type (TYPE_TARGET_TYPE (type0), NULL, 1);
5b4ee69b 9658
f5938064
JG
9659 return ada_value_slice_from_ptr (array, arr_type0,
9660 longest_to_int (low_bound),
9661 longest_to_int (high_bound));
4c4b4cd2
PH
9662 }
9663 }
9664 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
9665 return array;
9666 else if (high_bound < low_bound)
df407dfe 9667 return empty_array (value_type (array), low_bound);
4c4b4cd2 9668 else
529cad9c
PH
9669 return ada_value_slice (array, longest_to_int (low_bound),
9670 longest_to_int (high_bound));
4c4b4cd2 9671 }
14f9c5c9 9672
4c4b4cd2
PH
9673 case UNOP_IN_RANGE:
9674 (*pos) += 2;
9675 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8008e265 9676 type = check_typedef (exp->elts[pc + 1].type);
14f9c5c9 9677
14f9c5c9 9678 if (noside == EVAL_SKIP)
4c4b4cd2 9679 goto nosideret;
14f9c5c9 9680
4c4b4cd2
PH
9681 switch (TYPE_CODE (type))
9682 {
9683 default:
e1d5a0d2
PH
9684 lim_warning (_("Membership test incompletely implemented; "
9685 "always returns true"));
fbb06eb1
UW
9686 type = language_bool_type (exp->language_defn, exp->gdbarch);
9687 return value_from_longest (type, (LONGEST) 1);
4c4b4cd2
PH
9688
9689 case TYPE_CODE_RANGE:
030b4912
UW
9690 arg2 = value_from_longest (type, TYPE_LOW_BOUND (type));
9691 arg3 = value_from_longest (type, TYPE_HIGH_BOUND (type));
f44316fa
UW
9692 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
9693 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3);
fbb06eb1
UW
9694 type = language_bool_type (exp->language_defn, exp->gdbarch);
9695 return
9696 value_from_longest (type,
4c4b4cd2
PH
9697 (value_less (arg1, arg3)
9698 || value_equal (arg1, arg3))
9699 && (value_less (arg2, arg1)
9700 || value_equal (arg2, arg1)));
9701 }
9702
9703 case BINOP_IN_BOUNDS:
14f9c5c9 9704 (*pos) += 2;
4c4b4cd2
PH
9705 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9706 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
14f9c5c9 9707
4c4b4cd2
PH
9708 if (noside == EVAL_SKIP)
9709 goto nosideret;
14f9c5c9 9710
4c4b4cd2 9711 if (noside == EVAL_AVOID_SIDE_EFFECTS)
fbb06eb1
UW
9712 {
9713 type = language_bool_type (exp->language_defn, exp->gdbarch);
9714 return value_zero (type, not_lval);
9715 }
14f9c5c9 9716
4c4b4cd2 9717 tem = longest_to_int (exp->elts[pc + 1].longconst);
14f9c5c9 9718
1eea4ebd
UW
9719 type = ada_index_type (value_type (arg2), tem, "range");
9720 if (!type)
9721 type = value_type (arg1);
14f9c5c9 9722
1eea4ebd
UW
9723 arg3 = value_from_longest (type, ada_array_bound (arg2, tem, 1));
9724 arg2 = value_from_longest (type, ada_array_bound (arg2, tem, 0));
d2e4a39e 9725
f44316fa
UW
9726 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
9727 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3);
fbb06eb1 9728 type = language_bool_type (exp->language_defn, exp->gdbarch);
4c4b4cd2 9729 return
fbb06eb1 9730 value_from_longest (type,
4c4b4cd2
PH
9731 (value_less (arg1, arg3)
9732 || value_equal (arg1, arg3))
9733 && (value_less (arg2, arg1)
9734 || value_equal (arg2, arg1)));
9735
9736 case TERNOP_IN_RANGE:
9737 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9738 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9739 arg3 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9740
9741 if (noside == EVAL_SKIP)
9742 goto nosideret;
9743
f44316fa
UW
9744 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
9745 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3);
fbb06eb1 9746 type = language_bool_type (exp->language_defn, exp->gdbarch);
4c4b4cd2 9747 return
fbb06eb1 9748 value_from_longest (type,
4c4b4cd2
PH
9749 (value_less (arg1, arg3)
9750 || value_equal (arg1, arg3))
9751 && (value_less (arg2, arg1)
9752 || value_equal (arg2, arg1)));
9753
9754 case OP_ATR_FIRST:
9755 case OP_ATR_LAST:
9756 case OP_ATR_LENGTH:
9757 {
76a01679 9758 struct type *type_arg;
5b4ee69b 9759
76a01679
JB
9760 if (exp->elts[*pos].opcode == OP_TYPE)
9761 {
9762 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
9763 arg1 = NULL;
5bc23cb3 9764 type_arg = check_typedef (exp->elts[pc + 2].type);
76a01679
JB
9765 }
9766 else
9767 {
9768 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9769 type_arg = NULL;
9770 }
9771
9772 if (exp->elts[*pos].opcode != OP_LONG)
323e0a4a 9773 error (_("Invalid operand to '%s"), ada_attribute_name (op));
76a01679
JB
9774 tem = longest_to_int (exp->elts[*pos + 2].longconst);
9775 *pos += 4;
9776
9777 if (noside == EVAL_SKIP)
9778 goto nosideret;
9779
9780 if (type_arg == NULL)
9781 {
9782 arg1 = ada_coerce_ref (arg1);
9783
ad82864c 9784 if (ada_is_constrained_packed_array_type (value_type (arg1)))
76a01679
JB
9785 arg1 = ada_coerce_to_simple_array (arg1);
9786
1eea4ebd
UW
9787 type = ada_index_type (value_type (arg1), tem,
9788 ada_attribute_name (op));
9789 if (type == NULL)
9790 type = builtin_type (exp->gdbarch)->builtin_int;
76a01679
JB
9791
9792 if (noside == EVAL_AVOID_SIDE_EFFECTS)
1eea4ebd 9793 return allocate_value (type);
76a01679
JB
9794
9795 switch (op)
9796 {
9797 default: /* Should never happen. */
323e0a4a 9798 error (_("unexpected attribute encountered"));
76a01679 9799 case OP_ATR_FIRST:
1eea4ebd
UW
9800 return value_from_longest
9801 (type, ada_array_bound (arg1, tem, 0));
76a01679 9802 case OP_ATR_LAST:
1eea4ebd
UW
9803 return value_from_longest
9804 (type, ada_array_bound (arg1, tem, 1));
76a01679 9805 case OP_ATR_LENGTH:
1eea4ebd
UW
9806 return value_from_longest
9807 (type, ada_array_length (arg1, tem));
76a01679
JB
9808 }
9809 }
9810 else if (discrete_type_p (type_arg))
9811 {
9812 struct type *range_type;
9813 char *name = ada_type_name (type_arg);
5b4ee69b 9814
76a01679
JB
9815 range_type = NULL;
9816 if (name != NULL && TYPE_CODE (type_arg) != TYPE_CODE_ENUM)
28c85d6c 9817 range_type = to_fixed_range_type (type_arg, NULL);
76a01679
JB
9818 if (range_type == NULL)
9819 range_type = type_arg;
9820 switch (op)
9821 {
9822 default:
323e0a4a 9823 error (_("unexpected attribute encountered"));
76a01679 9824 case OP_ATR_FIRST:
690cc4eb 9825 return value_from_longest
43bbcdc2 9826 (range_type, ada_discrete_type_low_bound (range_type));
76a01679 9827 case OP_ATR_LAST:
690cc4eb 9828 return value_from_longest
43bbcdc2 9829 (range_type, ada_discrete_type_high_bound (range_type));
76a01679 9830 case OP_ATR_LENGTH:
323e0a4a 9831 error (_("the 'length attribute applies only to array types"));
76a01679
JB
9832 }
9833 }
9834 else if (TYPE_CODE (type_arg) == TYPE_CODE_FLT)
323e0a4a 9835 error (_("unimplemented type attribute"));
76a01679
JB
9836 else
9837 {
9838 LONGEST low, high;
9839
ad82864c
JB
9840 if (ada_is_constrained_packed_array_type (type_arg))
9841 type_arg = decode_constrained_packed_array_type (type_arg);
76a01679 9842
1eea4ebd 9843 type = ada_index_type (type_arg, tem, ada_attribute_name (op));
76a01679 9844 if (type == NULL)
1eea4ebd
UW
9845 type = builtin_type (exp->gdbarch)->builtin_int;
9846
76a01679
JB
9847 if (noside == EVAL_AVOID_SIDE_EFFECTS)
9848 return allocate_value (type);
9849
9850 switch (op)
9851 {
9852 default:
323e0a4a 9853 error (_("unexpected attribute encountered"));
76a01679 9854 case OP_ATR_FIRST:
1eea4ebd 9855 low = ada_array_bound_from_type (type_arg, tem, 0);
76a01679
JB
9856 return value_from_longest (type, low);
9857 case OP_ATR_LAST:
1eea4ebd 9858 high = ada_array_bound_from_type (type_arg, tem, 1);
76a01679
JB
9859 return value_from_longest (type, high);
9860 case OP_ATR_LENGTH:
1eea4ebd
UW
9861 low = ada_array_bound_from_type (type_arg, tem, 0);
9862 high = ada_array_bound_from_type (type_arg, tem, 1);
76a01679
JB
9863 return value_from_longest (type, high - low + 1);
9864 }
9865 }
14f9c5c9
AS
9866 }
9867
4c4b4cd2
PH
9868 case OP_ATR_TAG:
9869 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9870 if (noside == EVAL_SKIP)
76a01679 9871 goto nosideret;
4c4b4cd2
PH
9872
9873 if (noside == EVAL_AVOID_SIDE_EFFECTS)
76a01679 9874 return value_zero (ada_tag_type (arg1), not_lval);
4c4b4cd2
PH
9875
9876 return ada_value_tag (arg1);
9877
9878 case OP_ATR_MIN:
9879 case OP_ATR_MAX:
9880 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
14f9c5c9
AS
9881 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9882 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9883 if (noside == EVAL_SKIP)
76a01679 9884 goto nosideret;
d2e4a39e 9885 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
df407dfe 9886 return value_zero (value_type (arg1), not_lval);
14f9c5c9 9887 else
f44316fa
UW
9888 {
9889 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
9890 return value_binop (arg1, arg2,
9891 op == OP_ATR_MIN ? BINOP_MIN : BINOP_MAX);
9892 }
14f9c5c9 9893
4c4b4cd2
PH
9894 case OP_ATR_MODULUS:
9895 {
31dedfee 9896 struct type *type_arg = check_typedef (exp->elts[pc + 2].type);
4c4b4cd2 9897
5b4ee69b 9898 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
76a01679
JB
9899 if (noside == EVAL_SKIP)
9900 goto nosideret;
4c4b4cd2 9901
76a01679 9902 if (!ada_is_modular_type (type_arg))
323e0a4a 9903 error (_("'modulus must be applied to modular type"));
4c4b4cd2 9904
76a01679
JB
9905 return value_from_longest (TYPE_TARGET_TYPE (type_arg),
9906 ada_modulus (type_arg));
4c4b4cd2
PH
9907 }
9908
9909
9910 case OP_ATR_POS:
9911 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
14f9c5c9
AS
9912 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9913 if (noside == EVAL_SKIP)
76a01679 9914 goto nosideret;
3cb382c9
UW
9915 type = builtin_type (exp->gdbarch)->builtin_int;
9916 if (noside == EVAL_AVOID_SIDE_EFFECTS)
9917 return value_zero (type, not_lval);
14f9c5c9 9918 else
3cb382c9 9919 return value_pos_atr (type, arg1);
14f9c5c9 9920
4c4b4cd2
PH
9921 case OP_ATR_SIZE:
9922 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
8c1c099f
JB
9923 type = value_type (arg1);
9924
9925 /* If the argument is a reference, then dereference its type, since
9926 the user is really asking for the size of the actual object,
9927 not the size of the pointer. */
9928 if (TYPE_CODE (type) == TYPE_CODE_REF)
9929 type = TYPE_TARGET_TYPE (type);
9930
4c4b4cd2 9931 if (noside == EVAL_SKIP)
76a01679 9932 goto nosideret;
4c4b4cd2 9933 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
22601c15 9934 return value_zero (builtin_type (exp->gdbarch)->builtin_int, not_lval);
4c4b4cd2 9935 else
22601c15 9936 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int,
8c1c099f 9937 TARGET_CHAR_BIT * TYPE_LENGTH (type));
4c4b4cd2
PH
9938
9939 case OP_ATR_VAL:
9940 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
14f9c5c9 9941 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
4c4b4cd2 9942 type = exp->elts[pc + 2].type;
14f9c5c9 9943 if (noside == EVAL_SKIP)
76a01679 9944 goto nosideret;
4c4b4cd2 9945 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
76a01679 9946 return value_zero (type, not_lval);
4c4b4cd2 9947 else
76a01679 9948 return value_val_atr (type, arg1);
4c4b4cd2
PH
9949
9950 case BINOP_EXP:
9951 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9952 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9953 if (noside == EVAL_SKIP)
9954 goto nosideret;
9955 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
df407dfe 9956 return value_zero (value_type (arg1), not_lval);
4c4b4cd2 9957 else
f44316fa
UW
9958 {
9959 /* For integer exponentiation operations,
9960 only promote the first argument. */
9961 if (is_integral_type (value_type (arg2)))
9962 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
9963 else
9964 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
9965
9966 return value_binop (arg1, arg2, op);
9967 }
4c4b4cd2
PH
9968
9969 case UNOP_PLUS:
9970 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9971 if (noside == EVAL_SKIP)
9972 goto nosideret;
9973 else
9974 return arg1;
9975
9976 case UNOP_ABS:
9977 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9978 if (noside == EVAL_SKIP)
9979 goto nosideret;
f44316fa 9980 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
df407dfe 9981 if (value_less (arg1, value_zero (value_type (arg1), not_lval)))
4c4b4cd2 9982 return value_neg (arg1);
14f9c5c9 9983 else
4c4b4cd2 9984 return arg1;
14f9c5c9
AS
9985
9986 case UNOP_IND:
6b0d7253 9987 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
14f9c5c9 9988 if (noside == EVAL_SKIP)
4c4b4cd2 9989 goto nosideret;
df407dfe 9990 type = ada_check_typedef (value_type (arg1));
14f9c5c9 9991 if (noside == EVAL_AVOID_SIDE_EFFECTS)
4c4b4cd2
PH
9992 {
9993 if (ada_is_array_descriptor_type (type))
9994 /* GDB allows dereferencing GNAT array descriptors. */
9995 {
9996 struct type *arrType = ada_type_of_array (arg1, 0);
5b4ee69b 9997
4c4b4cd2 9998 if (arrType == NULL)
323e0a4a 9999 error (_("Attempt to dereference null array pointer."));
00a4c844 10000 return value_at_lazy (arrType, 0);
4c4b4cd2
PH
10001 }
10002 else if (TYPE_CODE (type) == TYPE_CODE_PTR
10003 || TYPE_CODE (type) == TYPE_CODE_REF
10004 /* In C you can dereference an array to get the 1st elt. */
10005 || TYPE_CODE (type) == TYPE_CODE_ARRAY)
714e53ab
PH
10006 {
10007 type = to_static_fixed_type
10008 (ada_aligned_type
10009 (ada_check_typedef (TYPE_TARGET_TYPE (type))));
10010 check_size (type);
10011 return value_zero (type, lval_memory);
10012 }
4c4b4cd2 10013 else if (TYPE_CODE (type) == TYPE_CODE_INT)
6b0d7253
JB
10014 {
10015 /* GDB allows dereferencing an int. */
10016 if (expect_type == NULL)
10017 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
10018 lval_memory);
10019 else
10020 {
10021 expect_type =
10022 to_static_fixed_type (ada_aligned_type (expect_type));
10023 return value_zero (expect_type, lval_memory);
10024 }
10025 }
4c4b4cd2 10026 else
323e0a4a 10027 error (_("Attempt to take contents of a non-pointer value."));
4c4b4cd2 10028 }
0963b4bd 10029 arg1 = ada_coerce_ref (arg1); /* FIXME: What is this for?? */
df407dfe 10030 type = ada_check_typedef (value_type (arg1));
d2e4a39e 10031
96967637
JB
10032 if (TYPE_CODE (type) == TYPE_CODE_INT)
10033 /* GDB allows dereferencing an int. If we were given
10034 the expect_type, then use that as the target type.
10035 Otherwise, assume that the target type is an int. */
10036 {
10037 if (expect_type != NULL)
10038 return ada_value_ind (value_cast (lookup_pointer_type (expect_type),
10039 arg1));
10040 else
10041 return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int,
10042 (CORE_ADDR) value_as_address (arg1));
10043 }
6b0d7253 10044
4c4b4cd2
PH
10045 if (ada_is_array_descriptor_type (type))
10046 /* GDB allows dereferencing GNAT array descriptors. */
10047 return ada_coerce_to_simple_array (arg1);
14f9c5c9 10048 else
4c4b4cd2 10049 return ada_value_ind (arg1);
14f9c5c9
AS
10050
10051 case STRUCTOP_STRUCT:
10052 tem = longest_to_int (exp->elts[pc + 1].longconst);
10053 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
10054 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10055 if (noside == EVAL_SKIP)
4c4b4cd2 10056 goto nosideret;
14f9c5c9 10057 if (noside == EVAL_AVOID_SIDE_EFFECTS)
76a01679 10058 {
df407dfe 10059 struct type *type1 = value_type (arg1);
5b4ee69b 10060
76a01679
JB
10061 if (ada_is_tagged_type (type1, 1))
10062 {
10063 type = ada_lookup_struct_elt_type (type1,
10064 &exp->elts[pc + 2].string,
10065 1, 1, NULL);
10066 if (type == NULL)
10067 /* In this case, we assume that the field COULD exist
10068 in some extension of the type. Return an object of
10069 "type" void, which will match any formal
0963b4bd 10070 (see ada_type_match). */
30b15541
UW
10071 return value_zero (builtin_type (exp->gdbarch)->builtin_void,
10072 lval_memory);
76a01679
JB
10073 }
10074 else
10075 type =
10076 ada_lookup_struct_elt_type (type1, &exp->elts[pc + 2].string, 1,
10077 0, NULL);
10078
10079 return value_zero (ada_aligned_type (type), lval_memory);
10080 }
14f9c5c9 10081 else
284614f0
JB
10082 arg1 = ada_value_struct_elt (arg1, &exp->elts[pc + 2].string, 0);
10083 arg1 = unwrap_value (arg1);
10084 return ada_to_fixed_value (arg1);
10085
14f9c5c9 10086 case OP_TYPE:
4c4b4cd2
PH
10087 /* The value is not supposed to be used. This is here to make it
10088 easier to accommodate expressions that contain types. */
14f9c5c9
AS
10089 (*pos) += 2;
10090 if (noside == EVAL_SKIP)
4c4b4cd2 10091 goto nosideret;
14f9c5c9 10092 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
a6cfbe68 10093 return allocate_value (exp->elts[pc + 1].type);
14f9c5c9 10094 else
323e0a4a 10095 error (_("Attempt to use a type name as an expression"));
52ce6436
PH
10096
10097 case OP_AGGREGATE:
10098 case OP_CHOICES:
10099 case OP_OTHERS:
10100 case OP_DISCRETE_RANGE:
10101 case OP_POSITIONAL:
10102 case OP_NAME:
10103 if (noside == EVAL_NORMAL)
10104 switch (op)
10105 {
10106 case OP_NAME:
10107 error (_("Undefined name, ambiguous name, or renaming used in "
e1d5a0d2 10108 "component association: %s."), &exp->elts[pc+2].string);
52ce6436
PH
10109 case OP_AGGREGATE:
10110 error (_("Aggregates only allowed on the right of an assignment"));
10111 default:
0963b4bd
MS
10112 internal_error (__FILE__, __LINE__,
10113 _("aggregate apparently mangled"));
52ce6436
PH
10114 }
10115
10116 ada_forward_operator_length (exp, pc, &oplen, &nargs);
10117 *pos += oplen - 1;
10118 for (tem = 0; tem < nargs; tem += 1)
10119 ada_evaluate_subexp (NULL, exp, pos, noside);
10120 goto nosideret;
14f9c5c9
AS
10121 }
10122
10123nosideret:
22601c15 10124 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
14f9c5c9 10125}
14f9c5c9 10126\f
d2e4a39e 10127
4c4b4cd2 10128 /* Fixed point */
14f9c5c9
AS
10129
10130/* If TYPE encodes an Ada fixed-point type, return the suffix of the
10131 type name that encodes the 'small and 'delta information.
4c4b4cd2 10132 Otherwise, return NULL. */
14f9c5c9 10133
d2e4a39e 10134static const char *
ebf56fd3 10135fixed_type_info (struct type *type)
14f9c5c9 10136{
d2e4a39e 10137 const char *name = ada_type_name (type);
14f9c5c9
AS
10138 enum type_code code = (type == NULL) ? TYPE_CODE_UNDEF : TYPE_CODE (type);
10139
d2e4a39e
AS
10140 if ((code == TYPE_CODE_INT || code == TYPE_CODE_RANGE) && name != NULL)
10141 {
14f9c5c9 10142 const char *tail = strstr (name, "___XF_");
5b4ee69b 10143
14f9c5c9 10144 if (tail == NULL)
4c4b4cd2 10145 return NULL;
d2e4a39e 10146 else
4c4b4cd2 10147 return tail + 5;
14f9c5c9
AS
10148 }
10149 else if (code == TYPE_CODE_RANGE && TYPE_TARGET_TYPE (type) != type)
10150 return fixed_type_info (TYPE_TARGET_TYPE (type));
10151 else
10152 return NULL;
10153}
10154
4c4b4cd2 10155/* Returns non-zero iff TYPE represents an Ada fixed-point type. */
14f9c5c9
AS
10156
10157int
ebf56fd3 10158ada_is_fixed_point_type (struct type *type)
14f9c5c9
AS
10159{
10160 return fixed_type_info (type) != NULL;
10161}
10162
4c4b4cd2
PH
10163/* Return non-zero iff TYPE represents a System.Address type. */
10164
10165int
10166ada_is_system_address_type (struct type *type)
10167{
10168 return (TYPE_NAME (type)
10169 && strcmp (TYPE_NAME (type), "system__address") == 0);
10170}
10171
14f9c5c9
AS
10172/* Assuming that TYPE is the representation of an Ada fixed-point
10173 type, return its delta, or -1 if the type is malformed and the
4c4b4cd2 10174 delta cannot be determined. */
14f9c5c9
AS
10175
10176DOUBLEST
ebf56fd3 10177ada_delta (struct type *type)
14f9c5c9
AS
10178{
10179 const char *encoding = fixed_type_info (type);
facc390f 10180 DOUBLEST num, den;
14f9c5c9 10181
facc390f
JB
10182 /* Strictly speaking, num and den are encoded as integer. However,
10183 they may not fit into a long, and they will have to be converted
10184 to DOUBLEST anyway. So scan them as DOUBLEST. */
10185 if (sscanf (encoding, "_%" DOUBLEST_SCAN_FORMAT "_%" DOUBLEST_SCAN_FORMAT,
10186 &num, &den) < 2)
14f9c5c9 10187 return -1.0;
d2e4a39e 10188 else
facc390f 10189 return num / den;
14f9c5c9
AS
10190}
10191
10192/* Assuming that ada_is_fixed_point_type (TYPE), return the scaling
4c4b4cd2 10193 factor ('SMALL value) associated with the type. */
14f9c5c9
AS
10194
10195static DOUBLEST
ebf56fd3 10196scaling_factor (struct type *type)
14f9c5c9
AS
10197{
10198 const char *encoding = fixed_type_info (type);
facc390f 10199 DOUBLEST num0, den0, num1, den1;
14f9c5c9 10200 int n;
d2e4a39e 10201
facc390f
JB
10202 /* Strictly speaking, num's and den's are encoded as integer. However,
10203 they may not fit into a long, and they will have to be converted
10204 to DOUBLEST anyway. So scan them as DOUBLEST. */
10205 n = sscanf (encoding,
10206 "_%" DOUBLEST_SCAN_FORMAT "_%" DOUBLEST_SCAN_FORMAT
10207 "_%" DOUBLEST_SCAN_FORMAT "_%" DOUBLEST_SCAN_FORMAT,
10208 &num0, &den0, &num1, &den1);
14f9c5c9
AS
10209
10210 if (n < 2)
10211 return 1.0;
10212 else if (n == 4)
facc390f 10213 return num1 / den1;
d2e4a39e 10214 else
facc390f 10215 return num0 / den0;
14f9c5c9
AS
10216}
10217
10218
10219/* Assuming that X is the representation of a value of fixed-point
4c4b4cd2 10220 type TYPE, return its floating-point equivalent. */
14f9c5c9
AS
10221
10222DOUBLEST
ebf56fd3 10223ada_fixed_to_float (struct type *type, LONGEST x)
14f9c5c9 10224{
d2e4a39e 10225 return (DOUBLEST) x *scaling_factor (type);
14f9c5c9
AS
10226}
10227
4c4b4cd2
PH
10228/* The representation of a fixed-point value of type TYPE
10229 corresponding to the value X. */
14f9c5c9
AS
10230
10231LONGEST
ebf56fd3 10232ada_float_to_fixed (struct type *type, DOUBLEST x)
14f9c5c9
AS
10233{
10234 return (LONGEST) (x / scaling_factor (type) + 0.5);
10235}
10236
14f9c5c9 10237\f
d2e4a39e 10238
4c4b4cd2 10239 /* Range types */
14f9c5c9
AS
10240
10241/* Scan STR beginning at position K for a discriminant name, and
10242 return the value of that discriminant field of DVAL in *PX. If
10243 PNEW_K is not null, put the position of the character beyond the
10244 name scanned in *PNEW_K. Return 1 if successful; return 0 and do
4c4b4cd2 10245 not alter *PX and *PNEW_K if unsuccessful. */
14f9c5c9
AS
10246
10247static int
07d8f827 10248scan_discrim_bound (char *str, int k, struct value *dval, LONGEST * px,
76a01679 10249 int *pnew_k)
14f9c5c9
AS
10250{
10251 static char *bound_buffer = NULL;
10252 static size_t bound_buffer_len = 0;
10253 char *bound;
10254 char *pend;
d2e4a39e 10255 struct value *bound_val;
14f9c5c9
AS
10256
10257 if (dval == NULL || str == NULL || str[k] == '\0')
10258 return 0;
10259
d2e4a39e 10260 pend = strstr (str + k, "__");
14f9c5c9
AS
10261 if (pend == NULL)
10262 {
d2e4a39e 10263 bound = str + k;
14f9c5c9
AS
10264 k += strlen (bound);
10265 }
d2e4a39e 10266 else
14f9c5c9 10267 {
d2e4a39e 10268 GROW_VECT (bound_buffer, bound_buffer_len, pend - (str + k) + 1);
14f9c5c9 10269 bound = bound_buffer;
d2e4a39e
AS
10270 strncpy (bound_buffer, str + k, pend - (str + k));
10271 bound[pend - (str + k)] = '\0';
10272 k = pend - str;
14f9c5c9 10273 }
d2e4a39e 10274
df407dfe 10275 bound_val = ada_search_struct_field (bound, dval, 0, value_type (dval));
14f9c5c9
AS
10276 if (bound_val == NULL)
10277 return 0;
10278
10279 *px = value_as_long (bound_val);
10280 if (pnew_k != NULL)
10281 *pnew_k = k;
10282 return 1;
10283}
10284
10285/* Value of variable named NAME in the current environment. If
10286 no such variable found, then if ERR_MSG is null, returns 0, and
4c4b4cd2
PH
10287 otherwise causes an error with message ERR_MSG. */
10288
d2e4a39e
AS
10289static struct value *
10290get_var_value (char *name, char *err_msg)
14f9c5c9 10291{
4c4b4cd2 10292 struct ada_symbol_info *syms;
14f9c5c9
AS
10293 int nsyms;
10294
4c4b4cd2
PH
10295 nsyms = ada_lookup_symbol_list (name, get_selected_block (0), VAR_DOMAIN,
10296 &syms);
14f9c5c9
AS
10297
10298 if (nsyms != 1)
10299 {
10300 if (err_msg == NULL)
4c4b4cd2 10301 return 0;
14f9c5c9 10302 else
8a3fe4f8 10303 error (("%s"), err_msg);
14f9c5c9
AS
10304 }
10305
4c4b4cd2 10306 return value_of_variable (syms[0].sym, syms[0].block);
14f9c5c9 10307}
d2e4a39e 10308
14f9c5c9 10309/* Value of integer variable named NAME in the current environment. If
4c4b4cd2
PH
10310 no such variable found, returns 0, and sets *FLAG to 0. If
10311 successful, sets *FLAG to 1. */
10312
14f9c5c9 10313LONGEST
4c4b4cd2 10314get_int_var_value (char *name, int *flag)
14f9c5c9 10315{
4c4b4cd2 10316 struct value *var_val = get_var_value (name, 0);
d2e4a39e 10317
14f9c5c9
AS
10318 if (var_val == 0)
10319 {
10320 if (flag != NULL)
4c4b4cd2 10321 *flag = 0;
14f9c5c9
AS
10322 return 0;
10323 }
10324 else
10325 {
10326 if (flag != NULL)
4c4b4cd2 10327 *flag = 1;
14f9c5c9
AS
10328 return value_as_long (var_val);
10329 }
10330}
d2e4a39e 10331
14f9c5c9
AS
10332
10333/* Return a range type whose base type is that of the range type named
10334 NAME in the current environment, and whose bounds are calculated
4c4b4cd2 10335 from NAME according to the GNAT range encoding conventions.
1ce677a4
UW
10336 Extract discriminant values, if needed, from DVAL. ORIG_TYPE is the
10337 corresponding range type from debug information; fall back to using it
10338 if symbol lookup fails. If a new type must be created, allocate it
10339 like ORIG_TYPE was. The bounds information, in general, is encoded
10340 in NAME, the base type given in the named range type. */
14f9c5c9 10341
d2e4a39e 10342static struct type *
28c85d6c 10343to_fixed_range_type (struct type *raw_type, struct value *dval)
14f9c5c9 10344{
28c85d6c 10345 char *name;
14f9c5c9 10346 struct type *base_type;
d2e4a39e 10347 char *subtype_info;
14f9c5c9 10348
28c85d6c
JB
10349 gdb_assert (raw_type != NULL);
10350 gdb_assert (TYPE_NAME (raw_type) != NULL);
dddfab26 10351
1ce677a4 10352 if (TYPE_CODE (raw_type) == TYPE_CODE_RANGE)
14f9c5c9
AS
10353 base_type = TYPE_TARGET_TYPE (raw_type);
10354 else
10355 base_type = raw_type;
10356
28c85d6c 10357 name = TYPE_NAME (raw_type);
14f9c5c9
AS
10358 subtype_info = strstr (name, "___XD");
10359 if (subtype_info == NULL)
690cc4eb 10360 {
43bbcdc2
PH
10361 LONGEST L = ada_discrete_type_low_bound (raw_type);
10362 LONGEST U = ada_discrete_type_high_bound (raw_type);
5b4ee69b 10363
690cc4eb
PH
10364 if (L < INT_MIN || U > INT_MAX)
10365 return raw_type;
10366 else
28c85d6c 10367 return create_range_type (alloc_type_copy (raw_type), raw_type,
43bbcdc2
PH
10368 ada_discrete_type_low_bound (raw_type),
10369 ada_discrete_type_high_bound (raw_type));
690cc4eb 10370 }
14f9c5c9
AS
10371 else
10372 {
10373 static char *name_buf = NULL;
10374 static size_t name_len = 0;
10375 int prefix_len = subtype_info - name;
10376 LONGEST L, U;
10377 struct type *type;
10378 char *bounds_str;
10379 int n;
10380
10381 GROW_VECT (name_buf, name_len, prefix_len + 5);
10382 strncpy (name_buf, name, prefix_len);
10383 name_buf[prefix_len] = '\0';
10384
10385 subtype_info += 5;
10386 bounds_str = strchr (subtype_info, '_');
10387 n = 1;
10388
d2e4a39e 10389 if (*subtype_info == 'L')
4c4b4cd2
PH
10390 {
10391 if (!ada_scan_number (bounds_str, n, &L, &n)
10392 && !scan_discrim_bound (bounds_str, n, dval, &L, &n))
10393 return raw_type;
10394 if (bounds_str[n] == '_')
10395 n += 2;
0963b4bd 10396 else if (bounds_str[n] == '.') /* FIXME? SGI Workshop kludge. */
4c4b4cd2
PH
10397 n += 1;
10398 subtype_info += 1;
10399 }
d2e4a39e 10400 else
4c4b4cd2
PH
10401 {
10402 int ok;
5b4ee69b 10403
4c4b4cd2
PH
10404 strcpy (name_buf + prefix_len, "___L");
10405 L = get_int_var_value (name_buf, &ok);
10406 if (!ok)
10407 {
323e0a4a 10408 lim_warning (_("Unknown lower bound, using 1."));
4c4b4cd2
PH
10409 L = 1;
10410 }
10411 }
14f9c5c9 10412
d2e4a39e 10413 if (*subtype_info == 'U')
4c4b4cd2
PH
10414 {
10415 if (!ada_scan_number (bounds_str, n, &U, &n)
10416 && !scan_discrim_bound (bounds_str, n, dval, &U, &n))
10417 return raw_type;
10418 }
d2e4a39e 10419 else
4c4b4cd2
PH
10420 {
10421 int ok;
5b4ee69b 10422
4c4b4cd2
PH
10423 strcpy (name_buf + prefix_len, "___U");
10424 U = get_int_var_value (name_buf, &ok);
10425 if (!ok)
10426 {
323e0a4a 10427 lim_warning (_("Unknown upper bound, using %ld."), (long) L);
4c4b4cd2
PH
10428 U = L;
10429 }
10430 }
14f9c5c9 10431
28c85d6c 10432 type = create_range_type (alloc_type_copy (raw_type), base_type, L, U);
d2e4a39e 10433 TYPE_NAME (type) = name;
14f9c5c9
AS
10434 return type;
10435 }
10436}
10437
4c4b4cd2
PH
10438/* True iff NAME is the name of a range type. */
10439
14f9c5c9 10440int
d2e4a39e 10441ada_is_range_type_name (const char *name)
14f9c5c9
AS
10442{
10443 return (name != NULL && strstr (name, "___XD"));
d2e4a39e 10444}
14f9c5c9 10445\f
d2e4a39e 10446
4c4b4cd2
PH
10447 /* Modular types */
10448
10449/* True iff TYPE is an Ada modular type. */
14f9c5c9 10450
14f9c5c9 10451int
d2e4a39e 10452ada_is_modular_type (struct type *type)
14f9c5c9 10453{
18af8284 10454 struct type *subranged_type = get_base_type (type);
14f9c5c9
AS
10455
10456 return (subranged_type != NULL && TYPE_CODE (type) == TYPE_CODE_RANGE
690cc4eb 10457 && TYPE_CODE (subranged_type) == TYPE_CODE_INT
4c4b4cd2 10458 && TYPE_UNSIGNED (subranged_type));
14f9c5c9
AS
10459}
10460
0056e4d5
JB
10461/* Try to determine the lower and upper bounds of the given modular type
10462 using the type name only. Return non-zero and set L and U as the lower
10463 and upper bounds (respectively) if successful. */
10464
10465int
10466ada_modulus_from_name (struct type *type, ULONGEST *modulus)
10467{
10468 char *name = ada_type_name (type);
10469 char *suffix;
10470 int k;
10471 LONGEST U;
10472
10473 if (name == NULL)
10474 return 0;
10475
10476 /* Discrete type bounds are encoded using an __XD suffix. In our case,
10477 we are looking for static bounds, which means an __XDLU suffix.
10478 Moreover, we know that the lower bound of modular types is always
10479 zero, so the actual suffix should start with "__XDLU_0__", and
10480 then be followed by the upper bound value. */
10481 suffix = strstr (name, "__XDLU_0__");
10482 if (suffix == NULL)
10483 return 0;
10484 k = 10;
10485 if (!ada_scan_number (suffix, k, &U, NULL))
10486 return 0;
10487
10488 *modulus = (ULONGEST) U + 1;
10489 return 1;
10490}
10491
4c4b4cd2
PH
10492/* Assuming ada_is_modular_type (TYPE), the modulus of TYPE. */
10493
61ee279c 10494ULONGEST
0056e4d5 10495ada_modulus (struct type *type)
14f9c5c9 10496{
43bbcdc2 10497 return (ULONGEST) TYPE_HIGH_BOUND (type) + 1;
14f9c5c9 10498}
d2e4a39e 10499\f
f7f9143b
JB
10500
10501/* Ada exception catchpoint support:
10502 ---------------------------------
10503
10504 We support 3 kinds of exception catchpoints:
10505 . catchpoints on Ada exceptions
10506 . catchpoints on unhandled Ada exceptions
10507 . catchpoints on failed assertions
10508
10509 Exceptions raised during failed assertions, or unhandled exceptions
10510 could perfectly be caught with the general catchpoint on Ada exceptions.
10511 However, we can easily differentiate these two special cases, and having
10512 the option to distinguish these two cases from the rest can be useful
10513 to zero-in on certain situations.
10514
10515 Exception catchpoints are a specialized form of breakpoint,
10516 since they rely on inserting breakpoints inside known routines
10517 of the GNAT runtime. The implementation therefore uses a standard
10518 breakpoint structure of the BP_BREAKPOINT type, but with its own set
10519 of breakpoint_ops.
10520
0259addd
JB
10521 Support in the runtime for exception catchpoints have been changed
10522 a few times already, and these changes affect the implementation
10523 of these catchpoints. In order to be able to support several
10524 variants of the runtime, we use a sniffer that will determine
28010a5d 10525 the runtime variant used by the program being debugged. */
f7f9143b
JB
10526
10527/* The different types of catchpoints that we introduced for catching
10528 Ada exceptions. */
10529
10530enum exception_catchpoint_kind
10531{
10532 ex_catch_exception,
10533 ex_catch_exception_unhandled,
10534 ex_catch_assert
10535};
10536
3d0b0fa3
JB
10537/* Ada's standard exceptions. */
10538
10539static char *standard_exc[] = {
10540 "constraint_error",
10541 "program_error",
10542 "storage_error",
10543 "tasking_error"
10544};
10545
0259addd
JB
10546typedef CORE_ADDR (ada_unhandled_exception_name_addr_ftype) (void);
10547
10548/* A structure that describes how to support exception catchpoints
10549 for a given executable. */
10550
10551struct exception_support_info
10552{
10553 /* The name of the symbol to break on in order to insert
10554 a catchpoint on exceptions. */
10555 const char *catch_exception_sym;
10556
10557 /* The name of the symbol to break on in order to insert
10558 a catchpoint on unhandled exceptions. */
10559 const char *catch_exception_unhandled_sym;
10560
10561 /* The name of the symbol to break on in order to insert
10562 a catchpoint on failed assertions. */
10563 const char *catch_assert_sym;
10564
10565 /* Assuming that the inferior just triggered an unhandled exception
10566 catchpoint, this function is responsible for returning the address
10567 in inferior memory where the name of that exception is stored.
10568 Return zero if the address could not be computed. */
10569 ada_unhandled_exception_name_addr_ftype *unhandled_exception_name_addr;
10570};
10571
10572static CORE_ADDR ada_unhandled_exception_name_addr (void);
10573static CORE_ADDR ada_unhandled_exception_name_addr_from_raise (void);
10574
10575/* The following exception support info structure describes how to
10576 implement exception catchpoints with the latest version of the
10577 Ada runtime (as of 2007-03-06). */
10578
10579static const struct exception_support_info default_exception_support_info =
10580{
10581 "__gnat_debug_raise_exception", /* catch_exception_sym */
10582 "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */
10583 "__gnat_debug_raise_assert_failure", /* catch_assert_sym */
10584 ada_unhandled_exception_name_addr
10585};
10586
10587/* The following exception support info structure describes how to
10588 implement exception catchpoints with a slightly older version
10589 of the Ada runtime. */
10590
10591static const struct exception_support_info exception_support_info_fallback =
10592{
10593 "__gnat_raise_nodefer_with_msg", /* catch_exception_sym */
10594 "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */
10595 "system__assertions__raise_assert_failure", /* catch_assert_sym */
10596 ada_unhandled_exception_name_addr_from_raise
10597};
10598
10599/* For each executable, we sniff which exception info structure to use
10600 and cache it in the following global variable. */
10601
10602static const struct exception_support_info *exception_info = NULL;
10603
10604/* Inspect the Ada runtime and determine which exception info structure
10605 should be used to provide support for exception catchpoints.
10606
10607 This function will always set exception_info, or raise an error. */
10608
10609static void
10610ada_exception_support_info_sniffer (void)
10611{
10612 struct symbol *sym;
10613
10614 /* If the exception info is already known, then no need to recompute it. */
10615 if (exception_info != NULL)
10616 return;
10617
10618 /* Check the latest (default) exception support info. */
10619 sym = standard_lookup (default_exception_support_info.catch_exception_sym,
10620 NULL, VAR_DOMAIN);
10621 if (sym != NULL)
10622 {
10623 exception_info = &default_exception_support_info;
10624 return;
10625 }
10626
10627 /* Try our fallback exception suport info. */
10628 sym = standard_lookup (exception_support_info_fallback.catch_exception_sym,
10629 NULL, VAR_DOMAIN);
10630 if (sym != NULL)
10631 {
10632 exception_info = &exception_support_info_fallback;
10633 return;
10634 }
10635
10636 /* Sometimes, it is normal for us to not be able to find the routine
10637 we are looking for. This happens when the program is linked with
10638 the shared version of the GNAT runtime, and the program has not been
10639 started yet. Inform the user of these two possible causes if
10640 applicable. */
10641
ccefe4c4 10642 if (ada_update_initial_language (language_unknown) != language_ada)
0259addd
JB
10643 error (_("Unable to insert catchpoint. Is this an Ada main program?"));
10644
10645 /* If the symbol does not exist, then check that the program is
10646 already started, to make sure that shared libraries have been
10647 loaded. If it is not started, this may mean that the symbol is
10648 in a shared library. */
10649
10650 if (ptid_get_pid (inferior_ptid) == 0)
10651 error (_("Unable to insert catchpoint. Try to start the program first."));
10652
10653 /* At this point, we know that we are debugging an Ada program and
10654 that the inferior has been started, but we still are not able to
0963b4bd 10655 find the run-time symbols. That can mean that we are in
0259addd
JB
10656 configurable run time mode, or that a-except as been optimized
10657 out by the linker... In any case, at this point it is not worth
10658 supporting this feature. */
10659
10660 error (_("Cannot insert catchpoints in this configuration."));
10661}
10662
10663/* An observer of "executable_changed" events.
10664 Its role is to clear certain cached values that need to be recomputed
10665 each time a new executable is loaded by GDB. */
10666
10667static void
781b42b0 10668ada_executable_changed_observer (void)
0259addd
JB
10669{
10670 /* If the executable changed, then it is possible that the Ada runtime
10671 is different. So we need to invalidate the exception support info
10672 cache. */
10673 exception_info = NULL;
10674}
10675
f7f9143b
JB
10676/* True iff FRAME is very likely to be that of a function that is
10677 part of the runtime system. This is all very heuristic, but is
10678 intended to be used as advice as to what frames are uninteresting
10679 to most users. */
10680
10681static int
10682is_known_support_routine (struct frame_info *frame)
10683{
4ed6b5be 10684 struct symtab_and_line sal;
f7f9143b 10685 char *func_name;
692465f1 10686 enum language func_lang;
f7f9143b 10687 int i;
f7f9143b 10688
4ed6b5be
JB
10689 /* If this code does not have any debugging information (no symtab),
10690 This cannot be any user code. */
f7f9143b 10691
4ed6b5be 10692 find_frame_sal (frame, &sal);
f7f9143b
JB
10693 if (sal.symtab == NULL)
10694 return 1;
10695
4ed6b5be
JB
10696 /* If there is a symtab, but the associated source file cannot be
10697 located, then assume this is not user code: Selecting a frame
10698 for which we cannot display the code would not be very helpful
10699 for the user. This should also take care of case such as VxWorks
10700 where the kernel has some debugging info provided for a few units. */
f7f9143b 10701
9bbc9174 10702 if (symtab_to_fullname (sal.symtab) == NULL)
f7f9143b
JB
10703 return 1;
10704
4ed6b5be
JB
10705 /* Check the unit filename againt the Ada runtime file naming.
10706 We also check the name of the objfile against the name of some
10707 known system libraries that sometimes come with debugging info
10708 too. */
10709
f7f9143b
JB
10710 for (i = 0; known_runtime_file_name_patterns[i] != NULL; i += 1)
10711 {
10712 re_comp (known_runtime_file_name_patterns[i]);
10713 if (re_exec (sal.symtab->filename))
10714 return 1;
4ed6b5be
JB
10715 if (sal.symtab->objfile != NULL
10716 && re_exec (sal.symtab->objfile->name))
10717 return 1;
f7f9143b
JB
10718 }
10719
4ed6b5be 10720 /* Check whether the function is a GNAT-generated entity. */
f7f9143b 10721
e9e07ba6 10722 find_frame_funname (frame, &func_name, &func_lang, NULL);
f7f9143b
JB
10723 if (func_name == NULL)
10724 return 1;
10725
10726 for (i = 0; known_auxiliary_function_name_patterns[i] != NULL; i += 1)
10727 {
10728 re_comp (known_auxiliary_function_name_patterns[i]);
10729 if (re_exec (func_name))
10730 return 1;
10731 }
10732
10733 return 0;
10734}
10735
10736/* Find the first frame that contains debugging information and that is not
10737 part of the Ada run-time, starting from FI and moving upward. */
10738
0ef643c8 10739void
f7f9143b
JB
10740ada_find_printable_frame (struct frame_info *fi)
10741{
10742 for (; fi != NULL; fi = get_prev_frame (fi))
10743 {
10744 if (!is_known_support_routine (fi))
10745 {
10746 select_frame (fi);
10747 break;
10748 }
10749 }
10750
10751}
10752
10753/* Assuming that the inferior just triggered an unhandled exception
10754 catchpoint, return the address in inferior memory where the name
10755 of the exception is stored.
10756
10757 Return zero if the address could not be computed. */
10758
10759static CORE_ADDR
10760ada_unhandled_exception_name_addr (void)
0259addd
JB
10761{
10762 return parse_and_eval_address ("e.full_name");
10763}
10764
10765/* Same as ada_unhandled_exception_name_addr, except that this function
10766 should be used when the inferior uses an older version of the runtime,
10767 where the exception name needs to be extracted from a specific frame
10768 several frames up in the callstack. */
10769
10770static CORE_ADDR
10771ada_unhandled_exception_name_addr_from_raise (void)
f7f9143b
JB
10772{
10773 int frame_level;
10774 struct frame_info *fi;
10775
10776 /* To determine the name of this exception, we need to select
10777 the frame corresponding to RAISE_SYM_NAME. This frame is
10778 at least 3 levels up, so we simply skip the first 3 frames
10779 without checking the name of their associated function. */
10780 fi = get_current_frame ();
10781 for (frame_level = 0; frame_level < 3; frame_level += 1)
10782 if (fi != NULL)
10783 fi = get_prev_frame (fi);
10784
10785 while (fi != NULL)
10786 {
692465f1
JB
10787 char *func_name;
10788 enum language func_lang;
10789
e9e07ba6 10790 find_frame_funname (fi, &func_name, &func_lang, NULL);
f7f9143b 10791 if (func_name != NULL
0259addd 10792 && strcmp (func_name, exception_info->catch_exception_sym) == 0)
f7f9143b
JB
10793 break; /* We found the frame we were looking for... */
10794 fi = get_prev_frame (fi);
10795 }
10796
10797 if (fi == NULL)
10798 return 0;
10799
10800 select_frame (fi);
10801 return parse_and_eval_address ("id.full_name");
10802}
10803
10804/* Assuming the inferior just triggered an Ada exception catchpoint
10805 (of any type), return the address in inferior memory where the name
10806 of the exception is stored, if applicable.
10807
10808 Return zero if the address could not be computed, or if not relevant. */
10809
10810static CORE_ADDR
10811ada_exception_name_addr_1 (enum exception_catchpoint_kind ex,
10812 struct breakpoint *b)
10813{
10814 switch (ex)
10815 {
10816 case ex_catch_exception:
10817 return (parse_and_eval_address ("e.full_name"));
10818 break;
10819
10820 case ex_catch_exception_unhandled:
0259addd 10821 return exception_info->unhandled_exception_name_addr ();
f7f9143b
JB
10822 break;
10823
10824 case ex_catch_assert:
10825 return 0; /* Exception name is not relevant in this case. */
10826 break;
10827
10828 default:
10829 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
10830 break;
10831 }
10832
10833 return 0; /* Should never be reached. */
10834}
10835
10836/* Same as ada_exception_name_addr_1, except that it intercepts and contains
10837 any error that ada_exception_name_addr_1 might cause to be thrown.
10838 When an error is intercepted, a warning with the error message is printed,
10839 and zero is returned. */
10840
10841static CORE_ADDR
10842ada_exception_name_addr (enum exception_catchpoint_kind ex,
10843 struct breakpoint *b)
10844{
10845 struct gdb_exception e;
10846 CORE_ADDR result = 0;
10847
10848 TRY_CATCH (e, RETURN_MASK_ERROR)
10849 {
10850 result = ada_exception_name_addr_1 (ex, b);
10851 }
10852
10853 if (e.reason < 0)
10854 {
10855 warning (_("failed to get exception name: %s"), e.message);
10856 return 0;
10857 }
10858
10859 return result;
10860}
10861
28010a5d
PA
10862static struct symtab_and_line ada_exception_sal (enum exception_catchpoint_kind,
10863 char *, char **,
c0a91b2b 10864 const struct breakpoint_ops **);
28010a5d
PA
10865static char *ada_exception_catchpoint_cond_string (const char *excep_string);
10866
10867/* Ada catchpoints.
10868
10869 In the case of catchpoints on Ada exceptions, the catchpoint will
10870 stop the target on every exception the program throws. When a user
10871 specifies the name of a specific exception, we translate this
10872 request into a condition expression (in text form), and then parse
10873 it into an expression stored in each of the catchpoint's locations.
10874 We then use this condition to check whether the exception that was
10875 raised is the one the user is interested in. If not, then the
10876 target is resumed again. We store the name of the requested
10877 exception, in order to be able to re-set the condition expression
10878 when symbols change. */
10879
10880/* An instance of this type is used to represent an Ada catchpoint
10881 breakpoint location. It includes a "struct bp_location" as a kind
10882 of base class; users downcast to "struct bp_location *" when
10883 needed. */
10884
10885struct ada_catchpoint_location
10886{
10887 /* The base class. */
10888 struct bp_location base;
10889
10890 /* The condition that checks whether the exception that was raised
10891 is the specific exception the user specified on catchpoint
10892 creation. */
10893 struct expression *excep_cond_expr;
10894};
10895
10896/* Implement the DTOR method in the bp_location_ops structure for all
10897 Ada exception catchpoint kinds. */
10898
10899static void
10900ada_catchpoint_location_dtor (struct bp_location *bl)
10901{
10902 struct ada_catchpoint_location *al = (struct ada_catchpoint_location *) bl;
10903
10904 xfree (al->excep_cond_expr);
10905}
10906
10907/* The vtable to be used in Ada catchpoint locations. */
10908
10909static const struct bp_location_ops ada_catchpoint_location_ops =
10910{
10911 ada_catchpoint_location_dtor
10912};
10913
10914/* An instance of this type is used to represent an Ada catchpoint.
10915 It includes a "struct breakpoint" as a kind of base class; users
10916 downcast to "struct breakpoint *" when needed. */
10917
10918struct ada_catchpoint
10919{
10920 /* The base class. */
10921 struct breakpoint base;
10922
10923 /* The name of the specific exception the user specified. */
10924 char *excep_string;
10925};
10926
10927/* Parse the exception condition string in the context of each of the
10928 catchpoint's locations, and store them for later evaluation. */
10929
10930static void
10931create_excep_cond_exprs (struct ada_catchpoint *c)
10932{
10933 struct cleanup *old_chain;
10934 struct bp_location *bl;
10935 char *cond_string;
10936
10937 /* Nothing to do if there's no specific exception to catch. */
10938 if (c->excep_string == NULL)
10939 return;
10940
10941 /* Same if there are no locations... */
10942 if (c->base.loc == NULL)
10943 return;
10944
10945 /* Compute the condition expression in text form, from the specific
10946 expection we want to catch. */
10947 cond_string = ada_exception_catchpoint_cond_string (c->excep_string);
10948 old_chain = make_cleanup (xfree, cond_string);
10949
10950 /* Iterate over all the catchpoint's locations, and parse an
10951 expression for each. */
10952 for (bl = c->base.loc; bl != NULL; bl = bl->next)
10953 {
10954 struct ada_catchpoint_location *ada_loc
10955 = (struct ada_catchpoint_location *) bl;
10956 struct expression *exp = NULL;
10957
10958 if (!bl->shlib_disabled)
10959 {
10960 volatile struct gdb_exception e;
10961 char *s;
10962
10963 s = cond_string;
10964 TRY_CATCH (e, RETURN_MASK_ERROR)
10965 {
10966 exp = parse_exp_1 (&s, block_for_pc (bl->address), 0);
10967 }
10968 if (e.reason < 0)
10969 warning (_("failed to reevaluate internal exception condition "
10970 "for catchpoint %d: %s"),
10971 c->base.number, e.message);
10972 }
10973
10974 ada_loc->excep_cond_expr = exp;
10975 }
10976
10977 do_cleanups (old_chain);
10978}
10979
10980/* Implement the DTOR method in the breakpoint_ops structure for all
10981 exception catchpoint kinds. */
10982
10983static void
10984dtor_exception (enum exception_catchpoint_kind ex, struct breakpoint *b)
10985{
10986 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
10987
10988 xfree (c->excep_string);
348d480f 10989
2060206e 10990 bkpt_breakpoint_ops.dtor (b);
28010a5d
PA
10991}
10992
10993/* Implement the ALLOCATE_LOCATION method in the breakpoint_ops
10994 structure for all exception catchpoint kinds. */
10995
10996static struct bp_location *
10997allocate_location_exception (enum exception_catchpoint_kind ex,
10998 struct breakpoint *self)
10999{
11000 struct ada_catchpoint_location *loc;
11001
11002 loc = XNEW (struct ada_catchpoint_location);
11003 init_bp_location (&loc->base, &ada_catchpoint_location_ops, self);
11004 loc->excep_cond_expr = NULL;
11005 return &loc->base;
11006}
11007
11008/* Implement the RE_SET method in the breakpoint_ops structure for all
11009 exception catchpoint kinds. */
11010
11011static void
11012re_set_exception (enum exception_catchpoint_kind ex, struct breakpoint *b)
11013{
11014 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
11015
11016 /* Call the base class's method. This updates the catchpoint's
11017 locations. */
2060206e 11018 bkpt_breakpoint_ops.re_set (b);
28010a5d
PA
11019
11020 /* Reparse the exception conditional expressions. One for each
11021 location. */
11022 create_excep_cond_exprs (c);
11023}
11024
11025/* Returns true if we should stop for this breakpoint hit. If the
11026 user specified a specific exception, we only want to cause a stop
11027 if the program thrown that exception. */
11028
11029static int
11030should_stop_exception (const struct bp_location *bl)
11031{
11032 struct ada_catchpoint *c = (struct ada_catchpoint *) bl->owner;
11033 const struct ada_catchpoint_location *ada_loc
11034 = (const struct ada_catchpoint_location *) bl;
11035 volatile struct gdb_exception ex;
11036 int stop;
11037
11038 /* With no specific exception, should always stop. */
11039 if (c->excep_string == NULL)
11040 return 1;
11041
11042 if (ada_loc->excep_cond_expr == NULL)
11043 {
11044 /* We will have a NULL expression if back when we were creating
11045 the expressions, this location's had failed to parse. */
11046 return 1;
11047 }
11048
11049 stop = 1;
11050 TRY_CATCH (ex, RETURN_MASK_ALL)
11051 {
11052 struct value *mark;
11053
11054 mark = value_mark ();
11055 stop = value_true (evaluate_expression (ada_loc->excep_cond_expr));
11056 value_free_to_mark (mark);
11057 }
11058 if (ex.reason < 0)
11059 exception_fprintf (gdb_stderr, ex,
11060 _("Error in testing exception condition:\n"));
11061 return stop;
11062}
11063
11064/* Implement the CHECK_STATUS method in the breakpoint_ops structure
11065 for all exception catchpoint kinds. */
11066
11067static void
11068check_status_exception (enum exception_catchpoint_kind ex, bpstat bs)
11069{
11070 bs->stop = should_stop_exception (bs->bp_location_at);
11071}
11072
f7f9143b
JB
11073/* Implement the PRINT_IT method in the breakpoint_ops structure
11074 for all exception catchpoint kinds. */
11075
11076static enum print_stop_action
348d480f 11077print_it_exception (enum exception_catchpoint_kind ex, bpstat bs)
f7f9143b 11078{
79a45e25 11079 struct ui_out *uiout = current_uiout;
348d480f
PA
11080 struct breakpoint *b = bs->breakpoint_at;
11081
956a9fb9 11082 annotate_catchpoint (b->number);
f7f9143b 11083
956a9fb9 11084 if (ui_out_is_mi_like_p (uiout))
f7f9143b 11085 {
956a9fb9
JB
11086 ui_out_field_string (uiout, "reason",
11087 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT));
11088 ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition));
f7f9143b
JB
11089 }
11090
00eb2c4a
JB
11091 ui_out_text (uiout,
11092 b->disposition == disp_del ? "\nTemporary catchpoint "
11093 : "\nCatchpoint ");
956a9fb9
JB
11094 ui_out_field_int (uiout, "bkptno", b->number);
11095 ui_out_text (uiout, ", ");
f7f9143b 11096
f7f9143b
JB
11097 switch (ex)
11098 {
11099 case ex_catch_exception:
f7f9143b 11100 case ex_catch_exception_unhandled:
956a9fb9
JB
11101 {
11102 const CORE_ADDR addr = ada_exception_name_addr (ex, b);
11103 char exception_name[256];
11104
11105 if (addr != 0)
11106 {
11107 read_memory (addr, exception_name, sizeof (exception_name) - 1);
11108 exception_name [sizeof (exception_name) - 1] = '\0';
11109 }
11110 else
11111 {
11112 /* For some reason, we were unable to read the exception
11113 name. This could happen if the Runtime was compiled
11114 without debugging info, for instance. In that case,
11115 just replace the exception name by the generic string
11116 "exception" - it will read as "an exception" in the
11117 notification we are about to print. */
967cff16 11118 memcpy (exception_name, "exception", sizeof ("exception"));
956a9fb9
JB
11119 }
11120 /* In the case of unhandled exception breakpoints, we print
11121 the exception name as "unhandled EXCEPTION_NAME", to make
11122 it clearer to the user which kind of catchpoint just got
11123 hit. We used ui_out_text to make sure that this extra
11124 info does not pollute the exception name in the MI case. */
11125 if (ex == ex_catch_exception_unhandled)
11126 ui_out_text (uiout, "unhandled ");
11127 ui_out_field_string (uiout, "exception-name", exception_name);
11128 }
11129 break;
f7f9143b 11130 case ex_catch_assert:
956a9fb9
JB
11131 /* In this case, the name of the exception is not really
11132 important. Just print "failed assertion" to make it clearer
11133 that his program just hit an assertion-failure catchpoint.
11134 We used ui_out_text because this info does not belong in
11135 the MI output. */
11136 ui_out_text (uiout, "failed assertion");
11137 break;
f7f9143b 11138 }
956a9fb9
JB
11139 ui_out_text (uiout, " at ");
11140 ada_find_printable_frame (get_current_frame ());
f7f9143b
JB
11141
11142 return PRINT_SRC_AND_LOC;
11143}
11144
11145/* Implement the PRINT_ONE method in the breakpoint_ops structure
11146 for all exception catchpoint kinds. */
11147
11148static void
11149print_one_exception (enum exception_catchpoint_kind ex,
a6d9a66e 11150 struct breakpoint *b, struct bp_location **last_loc)
f7f9143b 11151{
79a45e25 11152 struct ui_out *uiout = current_uiout;
28010a5d 11153 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
79a45b7d
TT
11154 struct value_print_options opts;
11155
11156 get_user_print_options (&opts);
11157 if (opts.addressprint)
f7f9143b
JB
11158 {
11159 annotate_field (4);
5af949e3 11160 ui_out_field_core_addr (uiout, "addr", b->loc->gdbarch, b->loc->address);
f7f9143b
JB
11161 }
11162
11163 annotate_field (5);
a6d9a66e 11164 *last_loc = b->loc;
f7f9143b
JB
11165 switch (ex)
11166 {
11167 case ex_catch_exception:
28010a5d 11168 if (c->excep_string != NULL)
f7f9143b 11169 {
28010a5d
PA
11170 char *msg = xstrprintf (_("`%s' Ada exception"), c->excep_string);
11171
f7f9143b
JB
11172 ui_out_field_string (uiout, "what", msg);
11173 xfree (msg);
11174 }
11175 else
11176 ui_out_field_string (uiout, "what", "all Ada exceptions");
11177
11178 break;
11179
11180 case ex_catch_exception_unhandled:
11181 ui_out_field_string (uiout, "what", "unhandled Ada exceptions");
11182 break;
11183
11184 case ex_catch_assert:
11185 ui_out_field_string (uiout, "what", "failed Ada assertions");
11186 break;
11187
11188 default:
11189 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
11190 break;
11191 }
11192}
11193
11194/* Implement the PRINT_MENTION method in the breakpoint_ops structure
11195 for all exception catchpoint kinds. */
11196
11197static void
11198print_mention_exception (enum exception_catchpoint_kind ex,
11199 struct breakpoint *b)
11200{
28010a5d 11201 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
79a45e25 11202 struct ui_out *uiout = current_uiout;
28010a5d 11203
00eb2c4a
JB
11204 ui_out_text (uiout, b->disposition == disp_del ? _("Temporary catchpoint ")
11205 : _("Catchpoint "));
11206 ui_out_field_int (uiout, "bkptno", b->number);
11207 ui_out_text (uiout, ": ");
11208
f7f9143b
JB
11209 switch (ex)
11210 {
11211 case ex_catch_exception:
28010a5d 11212 if (c->excep_string != NULL)
00eb2c4a
JB
11213 {
11214 char *info = xstrprintf (_("`%s' Ada exception"), c->excep_string);
11215 struct cleanup *old_chain = make_cleanup (xfree, info);
11216
11217 ui_out_text (uiout, info);
11218 do_cleanups (old_chain);
11219 }
f7f9143b 11220 else
00eb2c4a 11221 ui_out_text (uiout, _("all Ada exceptions"));
f7f9143b
JB
11222 break;
11223
11224 case ex_catch_exception_unhandled:
00eb2c4a 11225 ui_out_text (uiout, _("unhandled Ada exceptions"));
f7f9143b
JB
11226 break;
11227
11228 case ex_catch_assert:
00eb2c4a 11229 ui_out_text (uiout, _("failed Ada assertions"));
f7f9143b
JB
11230 break;
11231
11232 default:
11233 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
11234 break;
11235 }
11236}
11237
6149aea9
PA
11238/* Implement the PRINT_RECREATE method in the breakpoint_ops structure
11239 for all exception catchpoint kinds. */
11240
11241static void
11242print_recreate_exception (enum exception_catchpoint_kind ex,
11243 struct breakpoint *b, struct ui_file *fp)
11244{
28010a5d
PA
11245 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
11246
6149aea9
PA
11247 switch (ex)
11248 {
11249 case ex_catch_exception:
11250 fprintf_filtered (fp, "catch exception");
28010a5d
PA
11251 if (c->excep_string != NULL)
11252 fprintf_filtered (fp, " %s", c->excep_string);
6149aea9
PA
11253 break;
11254
11255 case ex_catch_exception_unhandled:
78076abc 11256 fprintf_filtered (fp, "catch exception unhandled");
6149aea9
PA
11257 break;
11258
11259 case ex_catch_assert:
11260 fprintf_filtered (fp, "catch assert");
11261 break;
11262
11263 default:
11264 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
11265 }
d9b3f62e 11266 print_recreate_thread (b, fp);
6149aea9
PA
11267}
11268
f7f9143b
JB
11269/* Virtual table for "catch exception" breakpoints. */
11270
28010a5d
PA
11271static void
11272dtor_catch_exception (struct breakpoint *b)
11273{
11274 dtor_exception (ex_catch_exception, b);
11275}
11276
11277static struct bp_location *
11278allocate_location_catch_exception (struct breakpoint *self)
11279{
11280 return allocate_location_exception (ex_catch_exception, self);
11281}
11282
11283static void
11284re_set_catch_exception (struct breakpoint *b)
11285{
11286 re_set_exception (ex_catch_exception, b);
11287}
11288
11289static void
11290check_status_catch_exception (bpstat bs)
11291{
11292 check_status_exception (ex_catch_exception, bs);
11293}
11294
f7f9143b 11295static enum print_stop_action
348d480f 11296print_it_catch_exception (bpstat bs)
f7f9143b 11297{
348d480f 11298 return print_it_exception (ex_catch_exception, bs);
f7f9143b
JB
11299}
11300
11301static void
a6d9a66e 11302print_one_catch_exception (struct breakpoint *b, struct bp_location **last_loc)
f7f9143b 11303{
a6d9a66e 11304 print_one_exception (ex_catch_exception, b, last_loc);
f7f9143b
JB
11305}
11306
11307static void
11308print_mention_catch_exception (struct breakpoint *b)
11309{
11310 print_mention_exception (ex_catch_exception, b);
11311}
11312
6149aea9
PA
11313static void
11314print_recreate_catch_exception (struct breakpoint *b, struct ui_file *fp)
11315{
11316 print_recreate_exception (ex_catch_exception, b, fp);
11317}
11318
2060206e 11319static struct breakpoint_ops catch_exception_breakpoint_ops;
f7f9143b
JB
11320
11321/* Virtual table for "catch exception unhandled" breakpoints. */
11322
28010a5d
PA
11323static void
11324dtor_catch_exception_unhandled (struct breakpoint *b)
11325{
11326 dtor_exception (ex_catch_exception_unhandled, b);
11327}
11328
11329static struct bp_location *
11330allocate_location_catch_exception_unhandled (struct breakpoint *self)
11331{
11332 return allocate_location_exception (ex_catch_exception_unhandled, self);
11333}
11334
11335static void
11336re_set_catch_exception_unhandled (struct breakpoint *b)
11337{
11338 re_set_exception (ex_catch_exception_unhandled, b);
11339}
11340
11341static void
11342check_status_catch_exception_unhandled (bpstat bs)
11343{
11344 check_status_exception (ex_catch_exception_unhandled, bs);
11345}
11346
f7f9143b 11347static enum print_stop_action
348d480f 11348print_it_catch_exception_unhandled (bpstat bs)
f7f9143b 11349{
348d480f 11350 return print_it_exception (ex_catch_exception_unhandled, bs);
f7f9143b
JB
11351}
11352
11353static void
a6d9a66e
UW
11354print_one_catch_exception_unhandled (struct breakpoint *b,
11355 struct bp_location **last_loc)
f7f9143b 11356{
a6d9a66e 11357 print_one_exception (ex_catch_exception_unhandled, b, last_loc);
f7f9143b
JB
11358}
11359
11360static void
11361print_mention_catch_exception_unhandled (struct breakpoint *b)
11362{
11363 print_mention_exception (ex_catch_exception_unhandled, b);
11364}
11365
6149aea9
PA
11366static void
11367print_recreate_catch_exception_unhandled (struct breakpoint *b,
11368 struct ui_file *fp)
11369{
11370 print_recreate_exception (ex_catch_exception_unhandled, b, fp);
11371}
11372
2060206e 11373static struct breakpoint_ops catch_exception_unhandled_breakpoint_ops;
f7f9143b
JB
11374
11375/* Virtual table for "catch assert" breakpoints. */
11376
28010a5d
PA
11377static void
11378dtor_catch_assert (struct breakpoint *b)
11379{
11380 dtor_exception (ex_catch_assert, b);
11381}
11382
11383static struct bp_location *
11384allocate_location_catch_assert (struct breakpoint *self)
11385{
11386 return allocate_location_exception (ex_catch_assert, self);
11387}
11388
11389static void
11390re_set_catch_assert (struct breakpoint *b)
11391{
11392 return re_set_exception (ex_catch_assert, b);
11393}
11394
11395static void
11396check_status_catch_assert (bpstat bs)
11397{
11398 check_status_exception (ex_catch_assert, bs);
11399}
11400
f7f9143b 11401static enum print_stop_action
348d480f 11402print_it_catch_assert (bpstat bs)
f7f9143b 11403{
348d480f 11404 return print_it_exception (ex_catch_assert, bs);
f7f9143b
JB
11405}
11406
11407static void
a6d9a66e 11408print_one_catch_assert (struct breakpoint *b, struct bp_location **last_loc)
f7f9143b 11409{
a6d9a66e 11410 print_one_exception (ex_catch_assert, b, last_loc);
f7f9143b
JB
11411}
11412
11413static void
11414print_mention_catch_assert (struct breakpoint *b)
11415{
11416 print_mention_exception (ex_catch_assert, b);
11417}
11418
6149aea9
PA
11419static void
11420print_recreate_catch_assert (struct breakpoint *b, struct ui_file *fp)
11421{
11422 print_recreate_exception (ex_catch_assert, b, fp);
11423}
11424
2060206e 11425static struct breakpoint_ops catch_assert_breakpoint_ops;
f7f9143b 11426
f7f9143b
JB
11427/* Return a newly allocated copy of the first space-separated token
11428 in ARGSP, and then adjust ARGSP to point immediately after that
11429 token.
11430
11431 Return NULL if ARGPS does not contain any more tokens. */
11432
11433static char *
11434ada_get_next_arg (char **argsp)
11435{
11436 char *args = *argsp;
11437 char *end;
11438 char *result;
11439
11440 /* Skip any leading white space. */
11441
11442 while (isspace (*args))
11443 args++;
11444
11445 if (args[0] == '\0')
11446 return NULL; /* No more arguments. */
11447
11448 /* Find the end of the current argument. */
11449
11450 end = args;
11451 while (*end != '\0' && !isspace (*end))
11452 end++;
11453
11454 /* Adjust ARGSP to point to the start of the next argument. */
11455
11456 *argsp = end;
11457
11458 /* Make a copy of the current argument and return it. */
11459
11460 result = xmalloc (end - args + 1);
11461 strncpy (result, args, end - args);
11462 result[end - args] = '\0';
11463
11464 return result;
11465}
11466
11467/* Split the arguments specified in a "catch exception" command.
11468 Set EX to the appropriate catchpoint type.
28010a5d 11469 Set EXCEP_STRING to the name of the specific exception if
f7f9143b
JB
11470 specified by the user. */
11471
11472static void
11473catch_ada_exception_command_split (char *args,
11474 enum exception_catchpoint_kind *ex,
28010a5d 11475 char **excep_string)
f7f9143b
JB
11476{
11477 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
11478 char *exception_name;
11479
11480 exception_name = ada_get_next_arg (&args);
11481 make_cleanup (xfree, exception_name);
11482
11483 /* Check that we do not have any more arguments. Anything else
11484 is unexpected. */
11485
11486 while (isspace (*args))
11487 args++;
11488
11489 if (args[0] != '\0')
11490 error (_("Junk at end of expression"));
11491
11492 discard_cleanups (old_chain);
11493
11494 if (exception_name == NULL)
11495 {
11496 /* Catch all exceptions. */
11497 *ex = ex_catch_exception;
28010a5d 11498 *excep_string = NULL;
f7f9143b
JB
11499 }
11500 else if (strcmp (exception_name, "unhandled") == 0)
11501 {
11502 /* Catch unhandled exceptions. */
11503 *ex = ex_catch_exception_unhandled;
28010a5d 11504 *excep_string = NULL;
f7f9143b
JB
11505 }
11506 else
11507 {
11508 /* Catch a specific exception. */
11509 *ex = ex_catch_exception;
28010a5d 11510 *excep_string = exception_name;
f7f9143b
JB
11511 }
11512}
11513
11514/* Return the name of the symbol on which we should break in order to
11515 implement a catchpoint of the EX kind. */
11516
11517static const char *
11518ada_exception_sym_name (enum exception_catchpoint_kind ex)
11519{
0259addd
JB
11520 gdb_assert (exception_info != NULL);
11521
f7f9143b
JB
11522 switch (ex)
11523 {
11524 case ex_catch_exception:
0259addd 11525 return (exception_info->catch_exception_sym);
f7f9143b
JB
11526 break;
11527 case ex_catch_exception_unhandled:
0259addd 11528 return (exception_info->catch_exception_unhandled_sym);
f7f9143b
JB
11529 break;
11530 case ex_catch_assert:
0259addd 11531 return (exception_info->catch_assert_sym);
f7f9143b
JB
11532 break;
11533 default:
11534 internal_error (__FILE__, __LINE__,
11535 _("unexpected catchpoint kind (%d)"), ex);
11536 }
11537}
11538
11539/* Return the breakpoint ops "virtual table" used for catchpoints
11540 of the EX kind. */
11541
c0a91b2b 11542static const struct breakpoint_ops *
4b9eee8c 11543ada_exception_breakpoint_ops (enum exception_catchpoint_kind ex)
f7f9143b
JB
11544{
11545 switch (ex)
11546 {
11547 case ex_catch_exception:
11548 return (&catch_exception_breakpoint_ops);
11549 break;
11550 case ex_catch_exception_unhandled:
11551 return (&catch_exception_unhandled_breakpoint_ops);
11552 break;
11553 case ex_catch_assert:
11554 return (&catch_assert_breakpoint_ops);
11555 break;
11556 default:
11557 internal_error (__FILE__, __LINE__,
11558 _("unexpected catchpoint kind (%d)"), ex);
11559 }
11560}
11561
11562/* Return the condition that will be used to match the current exception
11563 being raised with the exception that the user wants to catch. This
11564 assumes that this condition is used when the inferior just triggered
11565 an exception catchpoint.
11566
11567 The string returned is a newly allocated string that needs to be
11568 deallocated later. */
11569
11570static char *
28010a5d 11571ada_exception_catchpoint_cond_string (const char *excep_string)
f7f9143b 11572{
3d0b0fa3
JB
11573 int i;
11574
0963b4bd 11575 /* The standard exceptions are a special case. They are defined in
3d0b0fa3 11576 runtime units that have been compiled without debugging info; if
28010a5d 11577 EXCEP_STRING is the not-fully-qualified name of a standard
3d0b0fa3
JB
11578 exception (e.g. "constraint_error") then, during the evaluation
11579 of the condition expression, the symbol lookup on this name would
0963b4bd 11580 *not* return this standard exception. The catchpoint condition
3d0b0fa3
JB
11581 may then be set only on user-defined exceptions which have the
11582 same not-fully-qualified name (e.g. my_package.constraint_error).
11583
11584 To avoid this unexcepted behavior, these standard exceptions are
0963b4bd 11585 systematically prefixed by "standard". This means that "catch
3d0b0fa3
JB
11586 exception constraint_error" is rewritten into "catch exception
11587 standard.constraint_error".
11588
11589 If an exception named contraint_error is defined in another package of
11590 the inferior program, then the only way to specify this exception as a
11591 breakpoint condition is to use its fully-qualified named:
11592 e.g. my_package.constraint_error. */
11593
11594 for (i = 0; i < sizeof (standard_exc) / sizeof (char *); i++)
11595 {
28010a5d 11596 if (strcmp (standard_exc [i], excep_string) == 0)
3d0b0fa3
JB
11597 {
11598 return xstrprintf ("long_integer (e) = long_integer (&standard.%s)",
28010a5d 11599 excep_string);
3d0b0fa3
JB
11600 }
11601 }
28010a5d 11602 return xstrprintf ("long_integer (e) = long_integer (&%s)", excep_string);
f7f9143b
JB
11603}
11604
11605/* Return the symtab_and_line that should be used to insert an exception
11606 catchpoint of the TYPE kind.
11607
28010a5d
PA
11608 EXCEP_STRING should contain the name of a specific exception that
11609 the catchpoint should catch, or NULL otherwise.
f7f9143b 11610
28010a5d
PA
11611 ADDR_STRING returns the name of the function where the real
11612 breakpoint that implements the catchpoints is set, depending on the
11613 type of catchpoint we need to create. */
f7f9143b
JB
11614
11615static struct symtab_and_line
28010a5d 11616ada_exception_sal (enum exception_catchpoint_kind ex, char *excep_string,
c0a91b2b 11617 char **addr_string, const struct breakpoint_ops **ops)
f7f9143b
JB
11618{
11619 const char *sym_name;
11620 struct symbol *sym;
11621 struct symtab_and_line sal;
11622
0259addd
JB
11623 /* First, find out which exception support info to use. */
11624 ada_exception_support_info_sniffer ();
11625
11626 /* Then lookup the function on which we will break in order to catch
f7f9143b
JB
11627 the Ada exceptions requested by the user. */
11628
11629 sym_name = ada_exception_sym_name (ex);
11630 sym = standard_lookup (sym_name, NULL, VAR_DOMAIN);
11631
11632 /* The symbol we're looking up is provided by a unit in the GNAT runtime
11633 that should be compiled with debugging information. As a result, we
11634 expect to find that symbol in the symtabs. If we don't find it, then
11635 the target most likely does not support Ada exceptions, or we cannot
11636 insert exception breakpoints yet, because the GNAT runtime hasn't been
11637 loaded yet. */
11638
11639 /* brobecker/2006-12-26: It is conceivable that the runtime was compiled
11640 in such a way that no debugging information is produced for the symbol
11641 we are looking for. In this case, we could search the minimal symbols
11642 as a fall-back mechanism. This would still be operating in degraded
11643 mode, however, as we would still be missing the debugging information
11644 that is needed in order to extract the name of the exception being
11645 raised (this name is printed in the catchpoint message, and is also
11646 used when trying to catch a specific exception). We do not handle
11647 this case for now. */
11648
11649 if (sym == NULL)
0259addd 11650 error (_("Unable to break on '%s' in this configuration."), sym_name);
f7f9143b
JB
11651
11652 /* Make sure that the symbol we found corresponds to a function. */
11653 if (SYMBOL_CLASS (sym) != LOC_BLOCK)
11654 error (_("Symbol \"%s\" is not a function (class = %d)"),
11655 sym_name, SYMBOL_CLASS (sym));
11656
11657 sal = find_function_start_sal (sym, 1);
11658
11659 /* Set ADDR_STRING. */
11660
11661 *addr_string = xstrdup (sym_name);
11662
f7f9143b 11663 /* Set OPS. */
4b9eee8c 11664 *ops = ada_exception_breakpoint_ops (ex);
f7f9143b
JB
11665
11666 return sal;
11667}
11668
11669/* Parse the arguments (ARGS) of the "catch exception" command.
11670
f7f9143b
JB
11671 If the user asked the catchpoint to catch only a specific
11672 exception, then save the exception name in ADDR_STRING.
11673
11674 See ada_exception_sal for a description of all the remaining
11675 function arguments of this function. */
11676
9ac4176b 11677static struct symtab_and_line
f7f9143b 11678ada_decode_exception_location (char *args, char **addr_string,
28010a5d 11679 char **excep_string,
c0a91b2b 11680 const struct breakpoint_ops **ops)
f7f9143b
JB
11681{
11682 enum exception_catchpoint_kind ex;
11683
28010a5d
PA
11684 catch_ada_exception_command_split (args, &ex, excep_string);
11685 return ada_exception_sal (ex, *excep_string, addr_string, ops);
11686}
11687
11688/* Create an Ada exception catchpoint. */
11689
11690static void
11691create_ada_exception_catchpoint (struct gdbarch *gdbarch,
11692 struct symtab_and_line sal,
11693 char *addr_string,
11694 char *excep_string,
c0a91b2b 11695 const struct breakpoint_ops *ops,
28010a5d
PA
11696 int tempflag,
11697 int from_tty)
11698{
11699 struct ada_catchpoint *c;
11700
11701 c = XNEW (struct ada_catchpoint);
11702 init_ada_exception_breakpoint (&c->base, gdbarch, sal, addr_string,
11703 ops, tempflag, from_tty);
11704 c->excep_string = excep_string;
11705 create_excep_cond_exprs (c);
3ea46bff 11706 install_breakpoint (0, &c->base, 1);
f7f9143b
JB
11707}
11708
9ac4176b
PA
11709/* Implement the "catch exception" command. */
11710
11711static void
11712catch_ada_exception_command (char *arg, int from_tty,
11713 struct cmd_list_element *command)
11714{
11715 struct gdbarch *gdbarch = get_current_arch ();
11716 int tempflag;
11717 struct symtab_and_line sal;
11718 char *addr_string = NULL;
28010a5d 11719 char *excep_string = NULL;
c0a91b2b 11720 const struct breakpoint_ops *ops = NULL;
9ac4176b
PA
11721
11722 tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
11723
11724 if (!arg)
11725 arg = "";
28010a5d
PA
11726 sal = ada_decode_exception_location (arg, &addr_string, &excep_string, &ops);
11727 create_ada_exception_catchpoint (gdbarch, sal, addr_string,
11728 excep_string, ops, tempflag, from_tty);
9ac4176b
PA
11729}
11730
11731static struct symtab_and_line
f7f9143b 11732ada_decode_assert_location (char *args, char **addr_string,
c0a91b2b 11733 const struct breakpoint_ops **ops)
f7f9143b
JB
11734{
11735 /* Check that no argument where provided at the end of the command. */
11736
11737 if (args != NULL)
11738 {
11739 while (isspace (*args))
11740 args++;
11741 if (*args != '\0')
11742 error (_("Junk at end of arguments."));
11743 }
11744
28010a5d 11745 return ada_exception_sal (ex_catch_assert, NULL, addr_string, ops);
f7f9143b
JB
11746}
11747
9ac4176b
PA
11748/* Implement the "catch assert" command. */
11749
11750static void
11751catch_assert_command (char *arg, int from_tty,
11752 struct cmd_list_element *command)
11753{
11754 struct gdbarch *gdbarch = get_current_arch ();
11755 int tempflag;
11756 struct symtab_and_line sal;
11757 char *addr_string = NULL;
c0a91b2b 11758 const struct breakpoint_ops *ops = NULL;
9ac4176b
PA
11759
11760 tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
11761
11762 if (!arg)
11763 arg = "";
11764 sal = ada_decode_assert_location (arg, &addr_string, &ops);
28010a5d
PA
11765 create_ada_exception_catchpoint (gdbarch, sal, addr_string,
11766 NULL, ops, tempflag, from_tty);
9ac4176b 11767}
4c4b4cd2
PH
11768 /* Operators */
11769/* Information about operators given special treatment in functions
11770 below. */
11771/* Format: OP_DEFN (<operator>, <operator length>, <# args>, <binop>). */
11772
11773#define ADA_OPERATORS \
11774 OP_DEFN (OP_VAR_VALUE, 4, 0, 0) \
11775 OP_DEFN (BINOP_IN_BOUNDS, 3, 2, 0) \
11776 OP_DEFN (TERNOP_IN_RANGE, 1, 3, 0) \
11777 OP_DEFN (OP_ATR_FIRST, 1, 2, 0) \
11778 OP_DEFN (OP_ATR_LAST, 1, 2, 0) \
11779 OP_DEFN (OP_ATR_LENGTH, 1, 2, 0) \
11780 OP_DEFN (OP_ATR_IMAGE, 1, 2, 0) \
11781 OP_DEFN (OP_ATR_MAX, 1, 3, 0) \
11782 OP_DEFN (OP_ATR_MIN, 1, 3, 0) \
11783 OP_DEFN (OP_ATR_MODULUS, 1, 1, 0) \
11784 OP_DEFN (OP_ATR_POS, 1, 2, 0) \
11785 OP_DEFN (OP_ATR_SIZE, 1, 1, 0) \
11786 OP_DEFN (OP_ATR_TAG, 1, 1, 0) \
11787 OP_DEFN (OP_ATR_VAL, 1, 2, 0) \
11788 OP_DEFN (UNOP_QUAL, 3, 1, 0) \
52ce6436
PH
11789 OP_DEFN (UNOP_IN_RANGE, 3, 1, 0) \
11790 OP_DEFN (OP_OTHERS, 1, 1, 0) \
11791 OP_DEFN (OP_POSITIONAL, 3, 1, 0) \
11792 OP_DEFN (OP_DISCRETE_RANGE, 1, 2, 0)
4c4b4cd2
PH
11793
11794static void
554794dc
SDJ
11795ada_operator_length (const struct expression *exp, int pc, int *oplenp,
11796 int *argsp)
4c4b4cd2
PH
11797{
11798 switch (exp->elts[pc - 1].opcode)
11799 {
76a01679 11800 default:
4c4b4cd2
PH
11801 operator_length_standard (exp, pc, oplenp, argsp);
11802 break;
11803
11804#define OP_DEFN(op, len, args, binop) \
11805 case op: *oplenp = len; *argsp = args; break;
11806 ADA_OPERATORS;
11807#undef OP_DEFN
52ce6436
PH
11808
11809 case OP_AGGREGATE:
11810 *oplenp = 3;
11811 *argsp = longest_to_int (exp->elts[pc - 2].longconst);
11812 break;
11813
11814 case OP_CHOICES:
11815 *oplenp = 3;
11816 *argsp = longest_to_int (exp->elts[pc - 2].longconst) + 1;
11817 break;
4c4b4cd2
PH
11818 }
11819}
11820
c0201579
JK
11821/* Implementation of the exp_descriptor method operator_check. */
11822
11823static int
11824ada_operator_check (struct expression *exp, int pos,
11825 int (*objfile_func) (struct objfile *objfile, void *data),
11826 void *data)
11827{
11828 const union exp_element *const elts = exp->elts;
11829 struct type *type = NULL;
11830
11831 switch (elts[pos].opcode)
11832 {
11833 case UNOP_IN_RANGE:
11834 case UNOP_QUAL:
11835 type = elts[pos + 1].type;
11836 break;
11837
11838 default:
11839 return operator_check_standard (exp, pos, objfile_func, data);
11840 }
11841
11842 /* Invoke callbacks for TYPE and OBJFILE if they were set as non-NULL. */
11843
11844 if (type && TYPE_OBJFILE (type)
11845 && (*objfile_func) (TYPE_OBJFILE (type), data))
11846 return 1;
11847
11848 return 0;
11849}
11850
4c4b4cd2
PH
11851static char *
11852ada_op_name (enum exp_opcode opcode)
11853{
11854 switch (opcode)
11855 {
76a01679 11856 default:
4c4b4cd2 11857 return op_name_standard (opcode);
52ce6436 11858
4c4b4cd2
PH
11859#define OP_DEFN(op, len, args, binop) case op: return #op;
11860 ADA_OPERATORS;
11861#undef OP_DEFN
52ce6436
PH
11862
11863 case OP_AGGREGATE:
11864 return "OP_AGGREGATE";
11865 case OP_CHOICES:
11866 return "OP_CHOICES";
11867 case OP_NAME:
11868 return "OP_NAME";
4c4b4cd2
PH
11869 }
11870}
11871
11872/* As for operator_length, but assumes PC is pointing at the first
11873 element of the operator, and gives meaningful results only for the
52ce6436 11874 Ada-specific operators, returning 0 for *OPLENP and *ARGSP otherwise. */
4c4b4cd2
PH
11875
11876static void
76a01679
JB
11877ada_forward_operator_length (struct expression *exp, int pc,
11878 int *oplenp, int *argsp)
4c4b4cd2 11879{
76a01679 11880 switch (exp->elts[pc].opcode)
4c4b4cd2
PH
11881 {
11882 default:
11883 *oplenp = *argsp = 0;
11884 break;
52ce6436 11885
4c4b4cd2
PH
11886#define OP_DEFN(op, len, args, binop) \
11887 case op: *oplenp = len; *argsp = args; break;
11888 ADA_OPERATORS;
11889#undef OP_DEFN
52ce6436
PH
11890
11891 case OP_AGGREGATE:
11892 *oplenp = 3;
11893 *argsp = longest_to_int (exp->elts[pc + 1].longconst);
11894 break;
11895
11896 case OP_CHOICES:
11897 *oplenp = 3;
11898 *argsp = longest_to_int (exp->elts[pc + 1].longconst) + 1;
11899 break;
11900
11901 case OP_STRING:
11902 case OP_NAME:
11903 {
11904 int len = longest_to_int (exp->elts[pc + 1].longconst);
5b4ee69b 11905
52ce6436
PH
11906 *oplenp = 4 + BYTES_TO_EXP_ELEM (len + 1);
11907 *argsp = 0;
11908 break;
11909 }
4c4b4cd2
PH
11910 }
11911}
11912
11913static int
11914ada_dump_subexp_body (struct expression *exp, struct ui_file *stream, int elt)
11915{
11916 enum exp_opcode op = exp->elts[elt].opcode;
11917 int oplen, nargs;
11918 int pc = elt;
11919 int i;
76a01679 11920
4c4b4cd2
PH
11921 ada_forward_operator_length (exp, elt, &oplen, &nargs);
11922
76a01679 11923 switch (op)
4c4b4cd2 11924 {
76a01679 11925 /* Ada attributes ('Foo). */
4c4b4cd2
PH
11926 case OP_ATR_FIRST:
11927 case OP_ATR_LAST:
11928 case OP_ATR_LENGTH:
11929 case OP_ATR_IMAGE:
11930 case OP_ATR_MAX:
11931 case OP_ATR_MIN:
11932 case OP_ATR_MODULUS:
11933 case OP_ATR_POS:
11934 case OP_ATR_SIZE:
11935 case OP_ATR_TAG:
11936 case OP_ATR_VAL:
11937 break;
11938
11939 case UNOP_IN_RANGE:
11940 case UNOP_QUAL:
323e0a4a
AC
11941 /* XXX: gdb_sprint_host_address, type_sprint */
11942 fprintf_filtered (stream, _("Type @"));
4c4b4cd2
PH
11943 gdb_print_host_address (exp->elts[pc + 1].type, stream);
11944 fprintf_filtered (stream, " (");
11945 type_print (exp->elts[pc + 1].type, NULL, stream, 0);
11946 fprintf_filtered (stream, ")");
11947 break;
11948 case BINOP_IN_BOUNDS:
52ce6436
PH
11949 fprintf_filtered (stream, " (%d)",
11950 longest_to_int (exp->elts[pc + 2].longconst));
4c4b4cd2
PH
11951 break;
11952 case TERNOP_IN_RANGE:
11953 break;
11954
52ce6436
PH
11955 case OP_AGGREGATE:
11956 case OP_OTHERS:
11957 case OP_DISCRETE_RANGE:
11958 case OP_POSITIONAL:
11959 case OP_CHOICES:
11960 break;
11961
11962 case OP_NAME:
11963 case OP_STRING:
11964 {
11965 char *name = &exp->elts[elt + 2].string;
11966 int len = longest_to_int (exp->elts[elt + 1].longconst);
5b4ee69b 11967
52ce6436
PH
11968 fprintf_filtered (stream, "Text: `%.*s'", len, name);
11969 break;
11970 }
11971
4c4b4cd2
PH
11972 default:
11973 return dump_subexp_body_standard (exp, stream, elt);
11974 }
11975
11976 elt += oplen;
11977 for (i = 0; i < nargs; i += 1)
11978 elt = dump_subexp (exp, stream, elt);
11979
11980 return elt;
11981}
11982
11983/* The Ada extension of print_subexp (q.v.). */
11984
76a01679
JB
11985static void
11986ada_print_subexp (struct expression *exp, int *pos,
11987 struct ui_file *stream, enum precedence prec)
4c4b4cd2 11988{
52ce6436 11989 int oplen, nargs, i;
4c4b4cd2
PH
11990 int pc = *pos;
11991 enum exp_opcode op = exp->elts[pc].opcode;
11992
11993 ada_forward_operator_length (exp, pc, &oplen, &nargs);
11994
52ce6436 11995 *pos += oplen;
4c4b4cd2
PH
11996 switch (op)
11997 {
11998 default:
52ce6436 11999 *pos -= oplen;
4c4b4cd2
PH
12000 print_subexp_standard (exp, pos, stream, prec);
12001 return;
12002
12003 case OP_VAR_VALUE:
4c4b4cd2
PH
12004 fputs_filtered (SYMBOL_NATURAL_NAME (exp->elts[pc + 2].symbol), stream);
12005 return;
12006
12007 case BINOP_IN_BOUNDS:
323e0a4a 12008 /* XXX: sprint_subexp */
4c4b4cd2 12009 print_subexp (exp, pos, stream, PREC_SUFFIX);
0b48a291 12010 fputs_filtered (" in ", stream);
4c4b4cd2 12011 print_subexp (exp, pos, stream, PREC_SUFFIX);
0b48a291 12012 fputs_filtered ("'range", stream);
4c4b4cd2 12013 if (exp->elts[pc + 1].longconst > 1)
76a01679
JB
12014 fprintf_filtered (stream, "(%ld)",
12015 (long) exp->elts[pc + 1].longconst);
4c4b4cd2
PH
12016 return;
12017
12018 case TERNOP_IN_RANGE:
4c4b4cd2 12019 if (prec >= PREC_EQUAL)
76a01679 12020 fputs_filtered ("(", stream);
323e0a4a 12021 /* XXX: sprint_subexp */
4c4b4cd2 12022 print_subexp (exp, pos, stream, PREC_SUFFIX);
0b48a291 12023 fputs_filtered (" in ", stream);
4c4b4cd2
PH
12024 print_subexp (exp, pos, stream, PREC_EQUAL);
12025 fputs_filtered (" .. ", stream);
12026 print_subexp (exp, pos, stream, PREC_EQUAL);
12027 if (prec >= PREC_EQUAL)
76a01679
JB
12028 fputs_filtered (")", stream);
12029 return;
4c4b4cd2
PH
12030
12031 case OP_ATR_FIRST:
12032 case OP_ATR_LAST:
12033 case OP_ATR_LENGTH:
12034 case OP_ATR_IMAGE:
12035 case OP_ATR_MAX:
12036 case OP_ATR_MIN:
12037 case OP_ATR_MODULUS:
12038 case OP_ATR_POS:
12039 case OP_ATR_SIZE:
12040 case OP_ATR_TAG:
12041 case OP_ATR_VAL:
4c4b4cd2 12042 if (exp->elts[*pos].opcode == OP_TYPE)
76a01679
JB
12043 {
12044 if (TYPE_CODE (exp->elts[*pos + 1].type) != TYPE_CODE_VOID)
12045 LA_PRINT_TYPE (exp->elts[*pos + 1].type, "", stream, 0, 0);
12046 *pos += 3;
12047 }
4c4b4cd2 12048 else
76a01679 12049 print_subexp (exp, pos, stream, PREC_SUFFIX);
4c4b4cd2
PH
12050 fprintf_filtered (stream, "'%s", ada_attribute_name (op));
12051 if (nargs > 1)
76a01679
JB
12052 {
12053 int tem;
5b4ee69b 12054
76a01679
JB
12055 for (tem = 1; tem < nargs; tem += 1)
12056 {
12057 fputs_filtered ((tem == 1) ? " (" : ", ", stream);
12058 print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
12059 }
12060 fputs_filtered (")", stream);
12061 }
4c4b4cd2 12062 return;
14f9c5c9 12063
4c4b4cd2 12064 case UNOP_QUAL:
4c4b4cd2
PH
12065 type_print (exp->elts[pc + 1].type, "", stream, 0);
12066 fputs_filtered ("'(", stream);
12067 print_subexp (exp, pos, stream, PREC_PREFIX);
12068 fputs_filtered (")", stream);
12069 return;
14f9c5c9 12070
4c4b4cd2 12071 case UNOP_IN_RANGE:
323e0a4a 12072 /* XXX: sprint_subexp */
4c4b4cd2 12073 print_subexp (exp, pos, stream, PREC_SUFFIX);
0b48a291 12074 fputs_filtered (" in ", stream);
4c4b4cd2
PH
12075 LA_PRINT_TYPE (exp->elts[pc + 1].type, "", stream, 1, 0);
12076 return;
52ce6436
PH
12077
12078 case OP_DISCRETE_RANGE:
12079 print_subexp (exp, pos, stream, PREC_SUFFIX);
12080 fputs_filtered ("..", stream);
12081 print_subexp (exp, pos, stream, PREC_SUFFIX);
12082 return;
12083
12084 case OP_OTHERS:
12085 fputs_filtered ("others => ", stream);
12086 print_subexp (exp, pos, stream, PREC_SUFFIX);
12087 return;
12088
12089 case OP_CHOICES:
12090 for (i = 0; i < nargs-1; i += 1)
12091 {
12092 if (i > 0)
12093 fputs_filtered ("|", stream);
12094 print_subexp (exp, pos, stream, PREC_SUFFIX);
12095 }
12096 fputs_filtered (" => ", stream);
12097 print_subexp (exp, pos, stream, PREC_SUFFIX);
12098 return;
12099
12100 case OP_POSITIONAL:
12101 print_subexp (exp, pos, stream, PREC_SUFFIX);
12102 return;
12103
12104 case OP_AGGREGATE:
12105 fputs_filtered ("(", stream);
12106 for (i = 0; i < nargs; i += 1)
12107 {
12108 if (i > 0)
12109 fputs_filtered (", ", stream);
12110 print_subexp (exp, pos, stream, PREC_SUFFIX);
12111 }
12112 fputs_filtered (")", stream);
12113 return;
4c4b4cd2
PH
12114 }
12115}
14f9c5c9
AS
12116
12117/* Table mapping opcodes into strings for printing operators
12118 and precedences of the operators. */
12119
d2e4a39e
AS
12120static const struct op_print ada_op_print_tab[] = {
12121 {":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
12122 {"or else", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
12123 {"and then", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
12124 {"or", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
12125 {"xor", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
12126 {"and", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
12127 {"=", BINOP_EQUAL, PREC_EQUAL, 0},
12128 {"/=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
12129 {"<=", BINOP_LEQ, PREC_ORDER, 0},
12130 {">=", BINOP_GEQ, PREC_ORDER, 0},
12131 {">", BINOP_GTR, PREC_ORDER, 0},
12132 {"<", BINOP_LESS, PREC_ORDER, 0},
12133 {">>", BINOP_RSH, PREC_SHIFT, 0},
12134 {"<<", BINOP_LSH, PREC_SHIFT, 0},
12135 {"+", BINOP_ADD, PREC_ADD, 0},
12136 {"-", BINOP_SUB, PREC_ADD, 0},
12137 {"&", BINOP_CONCAT, PREC_ADD, 0},
12138 {"*", BINOP_MUL, PREC_MUL, 0},
12139 {"/", BINOP_DIV, PREC_MUL, 0},
12140 {"rem", BINOP_REM, PREC_MUL, 0},
12141 {"mod", BINOP_MOD, PREC_MUL, 0},
12142 {"**", BINOP_EXP, PREC_REPEAT, 0},
12143 {"@", BINOP_REPEAT, PREC_REPEAT, 0},
12144 {"-", UNOP_NEG, PREC_PREFIX, 0},
12145 {"+", UNOP_PLUS, PREC_PREFIX, 0},
12146 {"not ", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
12147 {"not ", UNOP_COMPLEMENT, PREC_PREFIX, 0},
12148 {"abs ", UNOP_ABS, PREC_PREFIX, 0},
4c4b4cd2
PH
12149 {".all", UNOP_IND, PREC_SUFFIX, 1},
12150 {"'access", UNOP_ADDR, PREC_SUFFIX, 1},
12151 {"'size", OP_ATR_SIZE, PREC_SUFFIX, 1},
d2e4a39e 12152 {NULL, 0, 0, 0}
14f9c5c9
AS
12153};
12154\f
72d5681a
PH
12155enum ada_primitive_types {
12156 ada_primitive_type_int,
12157 ada_primitive_type_long,
12158 ada_primitive_type_short,
12159 ada_primitive_type_char,
12160 ada_primitive_type_float,
12161 ada_primitive_type_double,
12162 ada_primitive_type_void,
12163 ada_primitive_type_long_long,
12164 ada_primitive_type_long_double,
12165 ada_primitive_type_natural,
12166 ada_primitive_type_positive,
12167 ada_primitive_type_system_address,
12168 nr_ada_primitive_types
12169};
6c038f32
PH
12170
12171static void
d4a9a881 12172ada_language_arch_info (struct gdbarch *gdbarch,
72d5681a
PH
12173 struct language_arch_info *lai)
12174{
d4a9a881 12175 const struct builtin_type *builtin = builtin_type (gdbarch);
5b4ee69b 12176
72d5681a 12177 lai->primitive_type_vector
d4a9a881 12178 = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_ada_primitive_types + 1,
72d5681a 12179 struct type *);
e9bb382b
UW
12180
12181 lai->primitive_type_vector [ada_primitive_type_int]
12182 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
12183 0, "integer");
12184 lai->primitive_type_vector [ada_primitive_type_long]
12185 = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
12186 0, "long_integer");
12187 lai->primitive_type_vector [ada_primitive_type_short]
12188 = arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch),
12189 0, "short_integer");
12190 lai->string_char_type
12191 = lai->primitive_type_vector [ada_primitive_type_char]
12192 = arch_integer_type (gdbarch, TARGET_CHAR_BIT, 0, "character");
12193 lai->primitive_type_vector [ada_primitive_type_float]
12194 = arch_float_type (gdbarch, gdbarch_float_bit (gdbarch),
12195 "float", NULL);
12196 lai->primitive_type_vector [ada_primitive_type_double]
12197 = arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
12198 "long_float", NULL);
12199 lai->primitive_type_vector [ada_primitive_type_long_long]
12200 = arch_integer_type (gdbarch, gdbarch_long_long_bit (gdbarch),
12201 0, "long_long_integer");
12202 lai->primitive_type_vector [ada_primitive_type_long_double]
12203 = arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
12204 "long_long_float", NULL);
12205 lai->primitive_type_vector [ada_primitive_type_natural]
12206 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
12207 0, "natural");
12208 lai->primitive_type_vector [ada_primitive_type_positive]
12209 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
12210 0, "positive");
12211 lai->primitive_type_vector [ada_primitive_type_void]
12212 = builtin->builtin_void;
12213
12214 lai->primitive_type_vector [ada_primitive_type_system_address]
12215 = lookup_pointer_type (arch_type (gdbarch, TYPE_CODE_VOID, 1, "void"));
72d5681a
PH
12216 TYPE_NAME (lai->primitive_type_vector [ada_primitive_type_system_address])
12217 = "system__address";
fbb06eb1 12218
47e729a8 12219 lai->bool_type_symbol = NULL;
fbb06eb1 12220 lai->bool_type_default = builtin->builtin_bool;
6c038f32 12221}
6c038f32
PH
12222\f
12223 /* Language vector */
12224
12225/* Not really used, but needed in the ada_language_defn. */
12226
12227static void
6c7a06a3 12228emit_char (int c, struct type *type, struct ui_file *stream, int quoter)
6c038f32 12229{
6c7a06a3 12230 ada_emit_char (c, type, stream, quoter, 1);
6c038f32
PH
12231}
12232
12233static int
12234parse (void)
12235{
12236 warnings_issued = 0;
12237 return ada_parse ();
12238}
12239
12240static const struct exp_descriptor ada_exp_descriptor = {
12241 ada_print_subexp,
12242 ada_operator_length,
c0201579 12243 ada_operator_check,
6c038f32
PH
12244 ada_op_name,
12245 ada_dump_subexp_body,
12246 ada_evaluate_subexp
12247};
12248
12249const struct language_defn ada_language_defn = {
12250 "ada", /* Language name */
12251 language_ada,
6c038f32
PH
12252 range_check_off,
12253 type_check_off,
12254 case_sensitive_on, /* Yes, Ada is case-insensitive, but
12255 that's not quite what this means. */
6c038f32 12256 array_row_major,
9a044a89 12257 macro_expansion_no,
6c038f32
PH
12258 &ada_exp_descriptor,
12259 parse,
12260 ada_error,
12261 resolve,
12262 ada_printchar, /* Print a character constant */
12263 ada_printstr, /* Function to print string constant */
12264 emit_char, /* Function to print single char (not used) */
6c038f32 12265 ada_print_type, /* Print a type using appropriate syntax */
be942545 12266 ada_print_typedef, /* Print a typedef using appropriate syntax */
6c038f32
PH
12267 ada_val_print, /* Print a value using appropriate syntax */
12268 ada_value_print, /* Print a top-level value */
12269 NULL, /* Language specific skip_trampoline */
2b2d9e11 12270 NULL, /* name_of_this */
6c038f32
PH
12271 ada_lookup_symbol_nonlocal, /* Looking up non-local symbols. */
12272 basic_lookup_transparent_type, /* lookup_transparent_type */
12273 ada_la_decode, /* Language specific symbol demangler */
0963b4bd
MS
12274 NULL, /* Language specific
12275 class_name_from_physname */
6c038f32
PH
12276 ada_op_print_tab, /* expression operators for printing */
12277 0, /* c-style arrays */
12278 1, /* String lower bound */
6c038f32 12279 ada_get_gdb_completer_word_break_characters,
41d27058 12280 ada_make_symbol_completion_list,
72d5681a 12281 ada_language_arch_info,
e79af960 12282 ada_print_array_index,
41f1b697 12283 default_pass_by_reference,
ae6a3a4c 12284 c_get_string,
6c038f32
PH
12285 LANG_MAGIC
12286};
12287
2c0b251b
PA
12288/* Provide a prototype to silence -Wmissing-prototypes. */
12289extern initialize_file_ftype _initialize_ada_language;
12290
5bf03f13
JB
12291/* Command-list for the "set/show ada" prefix command. */
12292static struct cmd_list_element *set_ada_list;
12293static struct cmd_list_element *show_ada_list;
12294
12295/* Implement the "set ada" prefix command. */
12296
12297static void
12298set_ada_command (char *arg, int from_tty)
12299{
12300 printf_unfiltered (_(\
12301"\"set ada\" must be followed by the name of a setting.\n"));
12302 help_list (set_ada_list, "set ada ", -1, gdb_stdout);
12303}
12304
12305/* Implement the "show ada" prefix command. */
12306
12307static void
12308show_ada_command (char *args, int from_tty)
12309{
12310 cmd_show_list (show_ada_list, from_tty, "");
12311}
12312
2060206e
PA
12313static void
12314initialize_ada_catchpoint_ops (void)
12315{
12316 struct breakpoint_ops *ops;
12317
12318 initialize_breakpoint_ops ();
12319
12320 ops = &catch_exception_breakpoint_ops;
12321 *ops = bkpt_breakpoint_ops;
12322 ops->dtor = dtor_catch_exception;
12323 ops->allocate_location = allocate_location_catch_exception;
12324 ops->re_set = re_set_catch_exception;
12325 ops->check_status = check_status_catch_exception;
12326 ops->print_it = print_it_catch_exception;
12327 ops->print_one = print_one_catch_exception;
12328 ops->print_mention = print_mention_catch_exception;
12329 ops->print_recreate = print_recreate_catch_exception;
12330
12331 ops = &catch_exception_unhandled_breakpoint_ops;
12332 *ops = bkpt_breakpoint_ops;
12333 ops->dtor = dtor_catch_exception_unhandled;
12334 ops->allocate_location = allocate_location_catch_exception_unhandled;
12335 ops->re_set = re_set_catch_exception_unhandled;
12336 ops->check_status = check_status_catch_exception_unhandled;
12337 ops->print_it = print_it_catch_exception_unhandled;
12338 ops->print_one = print_one_catch_exception_unhandled;
12339 ops->print_mention = print_mention_catch_exception_unhandled;
12340 ops->print_recreate = print_recreate_catch_exception_unhandled;
12341
12342 ops = &catch_assert_breakpoint_ops;
12343 *ops = bkpt_breakpoint_ops;
12344 ops->dtor = dtor_catch_assert;
12345 ops->allocate_location = allocate_location_catch_assert;
12346 ops->re_set = re_set_catch_assert;
12347 ops->check_status = check_status_catch_assert;
12348 ops->print_it = print_it_catch_assert;
12349 ops->print_one = print_one_catch_assert;
12350 ops->print_mention = print_mention_catch_assert;
12351 ops->print_recreate = print_recreate_catch_assert;
12352}
12353
d2e4a39e 12354void
6c038f32 12355_initialize_ada_language (void)
14f9c5c9 12356{
6c038f32
PH
12357 add_language (&ada_language_defn);
12358
2060206e
PA
12359 initialize_ada_catchpoint_ops ();
12360
5bf03f13
JB
12361 add_prefix_cmd ("ada", no_class, set_ada_command,
12362 _("Prefix command for changing Ada-specfic settings"),
12363 &set_ada_list, "set ada ", 0, &setlist);
12364
12365 add_prefix_cmd ("ada", no_class, show_ada_command,
12366 _("Generic command for showing Ada-specific settings."),
12367 &show_ada_list, "show ada ", 0, &showlist);
12368
12369 add_setshow_boolean_cmd ("trust-PAD-over-XVS", class_obscure,
12370 &trust_pad_over_xvs, _("\
12371Enable or disable an optimization trusting PAD types over XVS types"), _("\
12372Show whether an optimization trusting PAD types over XVS types is activated"),
12373 _("\
12374This is related to the encoding used by the GNAT compiler. The debugger\n\
12375should normally trust the contents of PAD types, but certain older versions\n\
12376of GNAT have a bug that sometimes causes the information in the PAD type\n\
12377to be incorrect. Turning this setting \"off\" allows the debugger to\n\
12378work around this bug. It is always safe to turn this option \"off\", but\n\
12379this incurs a slight performance penalty, so it is recommended to NOT change\n\
12380this option to \"off\" unless necessary."),
12381 NULL, NULL, &set_ada_list, &show_ada_list);
12382
9ac4176b
PA
12383 add_catch_command ("exception", _("\
12384Catch Ada exceptions, when raised.\n\
12385With an argument, catch only exceptions with the given name."),
12386 catch_ada_exception_command,
12387 NULL,
12388 CATCH_PERMANENT,
12389 CATCH_TEMPORARY);
12390 add_catch_command ("assert", _("\
12391Catch failed Ada assertions, when raised.\n\
12392With an argument, catch only exceptions with the given name."),
12393 catch_assert_command,
12394 NULL,
12395 CATCH_PERMANENT,
12396 CATCH_TEMPORARY);
12397
6c038f32 12398 varsize_limit = 65536;
6c038f32
PH
12399
12400 obstack_init (&symbol_list_obstack);
12401
12402 decoded_names_store = htab_create_alloc
12403 (256, htab_hash_string, (int (*)(const void *, const void *)) streq,
12404 NULL, xcalloc, xfree);
6b69afc4
JB
12405
12406 observer_attach_executable_changed (ada_executable_changed_observer);
e802dbe0
JB
12407
12408 /* Setup per-inferior data. */
12409 observer_attach_inferior_exit (ada_inferior_exit);
12410 ada_inferior_data
12411 = register_inferior_data_with_cleanup (ada_inferior_data_cleanup);
14f9c5c9 12412}