1 /* Ada language support routines for GDB, the GNU debugger.
3 Copyright (C) 1992-2016 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "gdb_regex.h"
29 #include "expression.h"
30 #include "parser-defs.h"
37 #include "breakpoint.h"
40 #include "gdb_obstack.h"
42 #include "completer.h"
47 #include "dictionary.h"
55 #include "typeprint.h"
56 #include "namespace.h"
60 #include "mi/mi-common.h"
61 #include "arch-utils.h"
62 #include "cli/cli-utils.h"
64 /* Define whether or not the C operator '/' truncates towards zero for
65 differently signed operands (truncation direction is undefined in C).
66 Copied from valarith.c. */
68 #ifndef TRUNCATION_TOWARDS_ZERO
69 #define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2)
72 static struct type *desc_base_type (struct type *);
74 static struct type *desc_bounds_type (struct type *);
76 static struct value *desc_bounds (struct value *);
78 static int fat_pntr_bounds_bitpos (struct type *);
80 static int fat_pntr_bounds_bitsize (struct type *);
82 static struct type *desc_data_target_type (struct type *);
84 static struct value *desc_data (struct value *);
86 static int fat_pntr_data_bitpos (struct type *);
88 static int fat_pntr_data_bitsize (struct type *);
90 static struct value *desc_one_bound (struct value *, int, int);
92 static int desc_bound_bitpos (struct type *, int, int);
94 static int desc_bound_bitsize (struct type *, int, int);
96 static struct type *desc_index_type (struct type *, int);
98 static int desc_arity (struct type *);
100 static int ada_type_match (struct type *, struct type *, int);
102 static int ada_args_match (struct symbol *, struct value **, int);
104 static int full_match (const char *, const char *);
106 static struct value *make_array_descriptor (struct type *, struct value *);
108 static void ada_add_block_symbols (struct obstack *,
109 const struct block *, const char *,
110 domain_enum, struct objfile *, int);
112 static void ada_add_all_symbols (struct obstack *, const struct block *,
113 const char *, domain_enum, int, int *);
115 static int is_nonfunction (struct block_symbol *, int);
117 static void add_defn_to_vec (struct obstack *, struct symbol *,
118 const struct block *);
120 static int num_defns_collected (struct obstack *);
122 static struct block_symbol *defns_collected (struct obstack *, int);
124 static struct value *resolve_subexp (struct expression **, int *, int,
127 static void replace_operator_with_call (struct expression **, int, int, int,
128 struct symbol *, const struct block *);
130 static int possible_user_operator_p (enum exp_opcode, struct value **);
132 static char *ada_op_name (enum exp_opcode);
134 static const char *ada_decoded_op_name (enum exp_opcode);
136 static int numeric_type_p (struct type *);
138 static int integer_type_p (struct type *);
140 static int scalar_type_p (struct type *);
142 static int discrete_type_p (struct type *);
144 static enum ada_renaming_category parse_old_style_renaming (struct type *,
149 static struct symbol *find_old_style_renaming_symbol (const char *,
150 const struct block *);
152 static struct type *ada_lookup_struct_elt_type (struct type *, char *,
155 static struct value *evaluate_subexp_type (struct expression *, int *);
157 static struct type *ada_find_parallel_type_with_name (struct type *,
160 static int is_dynamic_field (struct type *, int);
162 static struct type *to_fixed_variant_branch_type (struct type *,
164 CORE_ADDR, struct value *);
166 static struct type *to_fixed_array_type (struct type *, struct value *, int);
168 static struct type *to_fixed_range_type (struct type *, struct value *);
170 static struct type *to_static_fixed_type (struct type *);
171 static struct type *static_unwrap_type (struct type *type);
173 static struct value *unwrap_value (struct value *);
175 static struct type *constrained_packed_array_type (struct type *, long *);
177 static struct type *decode_constrained_packed_array_type (struct type *);
179 static long decode_packed_array_bitsize (struct type *);
181 static struct value *decode_constrained_packed_array (struct value *);
183 static int ada_is_packed_array_type (struct type *);
185 static int ada_is_unconstrained_packed_array_type (struct type *);
187 static struct value *value_subscript_packed (struct value *, int,
190 static void move_bits (gdb_byte *, int, const gdb_byte *, int, int, int);
192 static struct value *coerce_unspec_val_to_type (struct value *,
195 static struct value *get_var_value (char *, char *);
197 static int lesseq_defined_than (struct symbol *, struct symbol *);
199 static int equiv_types (struct type *, struct type *);
201 static int is_name_suffix (const char *);
203 static int advance_wild_match (const char **, const char *, int);
205 static int wild_match (const char *, const char *);
207 static struct value *ada_coerce_ref (struct value *);
209 static LONGEST pos_atr (struct value *);
211 static struct value *value_pos_atr (struct type *, struct value *);
213 static struct value *value_val_atr (struct type *, struct value *);
215 static struct symbol *standard_lookup (const char *, const struct block *,
218 static struct value *ada_search_struct_field (const char *, struct value *, int,
221 static struct value *ada_value_primitive_field (struct value *, int, int,
224 static int find_struct_field (const char *, struct type *, int,
225 struct type **, int *, int *, int *, int *);
227 static struct value *ada_to_fixed_value_create (struct type *, CORE_ADDR,
230 static int ada_resolve_function (struct block_symbol *, int,
231 struct value **, int, const char *,
234 static int ada_is_direct_array_type (struct type *);
236 static void ada_language_arch_info (struct gdbarch *,
237 struct language_arch_info *);
239 static struct value *ada_index_struct_field (int, struct value *, int,
242 static struct value *assign_aggregate (struct value *, struct value *,
246 static void aggregate_assign_from_choices (struct value *, struct value *,
248 int *, LONGEST *, int *,
249 int, LONGEST, LONGEST);
251 static void aggregate_assign_positional (struct value *, struct value *,
253 int *, LONGEST *, int *, int,
257 static void aggregate_assign_others (struct value *, struct value *,
259 int *, LONGEST *, int, LONGEST, LONGEST);
262 static void add_component_interval (LONGEST, LONGEST, LONGEST *, int *, int);
265 static struct value *ada_evaluate_subexp (struct type *, struct expression *,
268 static void ada_forward_operator_length (struct expression *, int, int *,
271 static struct type *ada_find_any_type (const char *name);
274 /* The result of a symbol lookup to be stored in our symbol cache. */
278 /* The name used to perform the lookup. */
280 /* The namespace used during the lookup. */
282 /* The symbol returned by the lookup, or NULL if no matching symbol
285 /* The block where the symbol was found, or NULL if no matching
287 const struct block *block;
288 /* A pointer to the next entry with the same hash. */
289 struct cache_entry *next;
292 /* The Ada symbol cache, used to store the result of Ada-mode symbol
293 lookups in the course of executing the user's commands.
295 The cache is implemented using a simple, fixed-sized hash.
296 The size is fixed on the grounds that there are not likely to be
297 all that many symbols looked up during any given session, regardless
298 of the size of the symbol table. If we decide to go to a resizable
299 table, let's just use the stuff from libiberty instead. */
301 #define HASH_SIZE 1009
303 struct ada_symbol_cache
305 /* An obstack used to store the entries in our cache. */
306 struct obstack cache_space;
308 /* The root of the hash table used to implement our symbol cache. */
309 struct cache_entry *root[HASH_SIZE];
312 static void ada_free_symbol_cache (struct ada_symbol_cache *sym_cache);
314 /* Maximum-sized dynamic type. */
315 static unsigned int varsize_limit;
317 /* FIXME: brobecker/2003-09-17: No longer a const because it is
318 returned by a function that does not return a const char *. */
319 static char *ada_completer_word_break_characters =
321 " \t\n!@#%^&*()+=|~`}{[]\";:?/,-";
323 " \t\n!@#$%^&*()+=|~`}{[]\";:?/,-";
326 /* The name of the symbol to use to get the name of the main subprogram. */
327 static const char ADA_MAIN_PROGRAM_SYMBOL_NAME[]
328 = "__gnat_ada_main_program_name";
330 /* Limit on the number of warnings to raise per expression evaluation. */
331 static int warning_limit = 2;
333 /* Number of warning messages issued; reset to 0 by cleanups after
334 expression evaluation. */
335 static int warnings_issued = 0;
337 static const char *known_runtime_file_name_patterns[] = {
338 ADA_KNOWN_RUNTIME_FILE_NAME_PATTERNS NULL
341 static const char *known_auxiliary_function_name_patterns[] = {
342 ADA_KNOWN_AUXILIARY_FUNCTION_NAME_PATTERNS NULL
345 /* Space for allocating results of ada_lookup_symbol_list. */
346 static struct obstack symbol_list_obstack;
348 /* Maintenance-related settings for this module. */
350 static struct cmd_list_element *maint_set_ada_cmdlist;
351 static struct cmd_list_element *maint_show_ada_cmdlist;
353 /* Implement the "maintenance set ada" (prefix) command. */
356 maint_set_ada_cmd (char *args, int from_tty)
358 help_list (maint_set_ada_cmdlist, "maintenance set ada ", all_commands,
362 /* Implement the "maintenance show ada" (prefix) command. */
365 maint_show_ada_cmd (char *args, int from_tty)
367 cmd_show_list (maint_show_ada_cmdlist, from_tty, "");
370 /* The "maintenance ada set/show ignore-descriptive-type" value. */
372 static int ada_ignore_descriptive_types_p = 0;
374 /* Inferior-specific data. */
376 /* Per-inferior data for this module. */
378 struct ada_inferior_data
380 /* The ada__tags__type_specific_data type, which is used when decoding
381 tagged types. With older versions of GNAT, this type was directly
382 accessible through a component ("tsd") in the object tag. But this
383 is no longer the case, so we cache it for each inferior. */
384 struct type *tsd_type;
386 /* The exception_support_info data. This data is used to determine
387 how to implement support for Ada exception catchpoints in a given
389 const struct exception_support_info *exception_info;
392 /* Our key to this module's inferior data. */
393 static const struct inferior_data *ada_inferior_data;
395 /* A cleanup routine for our inferior data. */
397 ada_inferior_data_cleanup (struct inferior *inf, void *arg)
399 struct ada_inferior_data *data;
401 data = (struct ada_inferior_data *) inferior_data (inf, ada_inferior_data);
406 /* Return our inferior data for the given inferior (INF).
408 This function always returns a valid pointer to an allocated
409 ada_inferior_data structure. If INF's inferior data has not
410 been previously set, this functions creates a new one with all
411 fields set to zero, sets INF's inferior to it, and then returns
412 a pointer to that newly allocated ada_inferior_data. */
414 static struct ada_inferior_data *
415 get_ada_inferior_data (struct inferior *inf)
417 struct ada_inferior_data *data;
419 data = (struct ada_inferior_data *) inferior_data (inf, ada_inferior_data);
422 data = XCNEW (struct ada_inferior_data);
423 set_inferior_data (inf, ada_inferior_data, data);
429 /* Perform all necessary cleanups regarding our module's inferior data
430 that is required after the inferior INF just exited. */
433 ada_inferior_exit (struct inferior *inf)
435 ada_inferior_data_cleanup (inf, NULL);
436 set_inferior_data (inf, ada_inferior_data, NULL);
440 /* program-space-specific data. */
442 /* This module's per-program-space data. */
443 struct ada_pspace_data
445 /* The Ada symbol cache. */
446 struct ada_symbol_cache *sym_cache;
449 /* Key to our per-program-space data. */
450 static const struct program_space_data *ada_pspace_data_handle;
452 /* Return this module's data for the given program space (PSPACE).
453 If not is found, add a zero'ed one now.
455 This function always returns a valid object. */
457 static struct ada_pspace_data *
458 get_ada_pspace_data (struct program_space *pspace)
460 struct ada_pspace_data *data;
462 data = ((struct ada_pspace_data *)
463 program_space_data (pspace, ada_pspace_data_handle));
466 data = XCNEW (struct ada_pspace_data);
467 set_program_space_data (pspace, ada_pspace_data_handle, data);
473 /* The cleanup callback for this module's per-program-space data. */
476 ada_pspace_data_cleanup (struct program_space *pspace, void *data)
478 struct ada_pspace_data *pspace_data = (struct ada_pspace_data *) data;
480 if (pspace_data->sym_cache != NULL)
481 ada_free_symbol_cache (pspace_data->sym_cache);
487 /* If TYPE is a TYPE_CODE_TYPEDEF type, return the target type after
488 all typedef layers have been peeled. Otherwise, return TYPE.
490 Normally, we really expect a typedef type to only have 1 typedef layer.
491 In other words, we really expect the target type of a typedef type to be
492 a non-typedef type. This is particularly true for Ada units, because
493 the language does not have a typedef vs not-typedef distinction.
494 In that respect, the Ada compiler has been trying to eliminate as many
495 typedef definitions in the debugging information, since they generally
496 do not bring any extra information (we still use typedef under certain
497 circumstances related mostly to the GNAT encoding).
499 Unfortunately, we have seen situations where the debugging information
500 generated by the compiler leads to such multiple typedef layers. For
501 instance, consider the following example with stabs:
503 .stabs "pck__float_array___XUP:Tt(0,46)=s16P_ARRAY:(0,47)=[...]"[...]
504 .stabs "pck__float_array___XUP:t(0,36)=(0,46)",128,0,6,0
506 This is an error in the debugging information which causes type
507 pck__float_array___XUP to be defined twice, and the second time,
508 it is defined as a typedef of a typedef.
510 This is on the fringe of legality as far as debugging information is
511 concerned, and certainly unexpected. But it is easy to handle these
512 situations correctly, so we can afford to be lenient in this case. */
515 ada_typedef_target_type (struct type *type)
517 while (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
518 type = TYPE_TARGET_TYPE (type);
522 /* Given DECODED_NAME a string holding a symbol name in its
523 decoded form (ie using the Ada dotted notation), returns
524 its unqualified name. */
527 ada_unqualified_name (const char *decoded_name)
531 /* If the decoded name starts with '<', it means that the encoded
532 name does not follow standard naming conventions, and thus that
533 it is not your typical Ada symbol name. Trying to unqualify it
534 is therefore pointless and possibly erroneous. */
535 if (decoded_name[0] == '<')
538 result = strrchr (decoded_name, '.');
540 result++; /* Skip the dot... */
542 result = decoded_name;
547 /* Return a string starting with '<', followed by STR, and '>'.
548 The result is good until the next call. */
551 add_angle_brackets (const char *str)
553 static char *result = NULL;
556 result = xstrprintf ("<%s>", str);
561 ada_get_gdb_completer_word_break_characters (void)
563 return ada_completer_word_break_characters;
566 /* Print an array element index using the Ada syntax. */
569 ada_print_array_index (struct value *index_value, struct ui_file *stream,
570 const struct value_print_options *options)
572 LA_VALUE_PRINT (index_value, stream, options);
573 fprintf_filtered (stream, " => ");
576 /* Assuming VECT points to an array of *SIZE objects of size
577 ELEMENT_SIZE, grow it to contain at least MIN_SIZE objects,
578 updating *SIZE as necessary and returning the (new) array. */
581 grow_vect (void *vect, size_t *size, size_t min_size, int element_size)
583 if (*size < min_size)
586 if (*size < min_size)
588 vect = xrealloc (vect, *size * element_size);
593 /* True (non-zero) iff TARGET matches FIELD_NAME up to any trailing
594 suffix of FIELD_NAME beginning "___". */
597 field_name_match (const char *field_name, const char *target)
599 int len = strlen (target);
602 (strncmp (field_name, target, len) == 0
603 && (field_name[len] == '\0'
604 || (startswith (field_name + len, "___")
605 && strcmp (field_name + strlen (field_name) - 6,
610 /* Assuming TYPE is a TYPE_CODE_STRUCT or a TYPE_CODE_TYPDEF to
611 a TYPE_CODE_STRUCT, find the field whose name matches FIELD_NAME,
612 and return its index. This function also handles fields whose name
613 have ___ suffixes because the compiler sometimes alters their name
614 by adding such a suffix to represent fields with certain constraints.
615 If the field could not be found, return a negative number if
616 MAYBE_MISSING is set. Otherwise raise an error. */
619 ada_get_field_index (const struct type *type, const char *field_name,
623 struct type *struct_type = check_typedef ((struct type *) type);
625 for (fieldno = 0; fieldno < TYPE_NFIELDS (struct_type); fieldno++)
626 if (field_name_match (TYPE_FIELD_NAME (struct_type, fieldno), field_name))
630 error (_("Unable to find field %s in struct %s. Aborting"),
631 field_name, TYPE_NAME (struct_type));
636 /* The length of the prefix of NAME prior to any "___" suffix. */
639 ada_name_prefix_len (const char *name)
645 const char *p = strstr (name, "___");
648 return strlen (name);
654 /* Return non-zero if SUFFIX is a suffix of STR.
655 Return zero if STR is null. */
658 is_suffix (const char *str, const char *suffix)
665 len2 = strlen (suffix);
666 return (len1 >= len2 && strcmp (str + len1 - len2, suffix) == 0);
669 /* The contents of value VAL, treated as a value of type TYPE. The
670 result is an lval in memory if VAL is. */
672 static struct value *
673 coerce_unspec_val_to_type (struct value *val, struct type *type)
675 type = ada_check_typedef (type);
676 if (value_type (val) == type)
680 struct value *result;
682 /* Make sure that the object size is not unreasonable before
683 trying to allocate some memory for it. */
684 ada_ensure_varsize_limit (type);
687 || TYPE_LENGTH (type) > TYPE_LENGTH (value_type (val)))
688 result = allocate_value_lazy (type);
691 result = allocate_value (type);
692 value_contents_copy_raw (result, 0, val, 0, TYPE_LENGTH (type));
694 set_value_component_location (result, val);
695 set_value_bitsize (result, value_bitsize (val));
696 set_value_bitpos (result, value_bitpos (val));
697 set_value_address (result, value_address (val));
702 static const gdb_byte *
703 cond_offset_host (const gdb_byte *valaddr, long offset)
708 return valaddr + offset;
712 cond_offset_target (CORE_ADDR address, long offset)
717 return address + offset;
720 /* Issue a warning (as for the definition of warning in utils.c, but
721 with exactly one argument rather than ...), unless the limit on the
722 number of warnings has passed during the evaluation of the current
725 /* FIXME: cagney/2004-10-10: This function is mimicking the behavior
726 provided by "complaint". */
727 static void lim_warning (const char *format, ...) ATTRIBUTE_PRINTF (1, 2);
730 lim_warning (const char *format, ...)
734 va_start (args, format);
735 warnings_issued += 1;
736 if (warnings_issued <= warning_limit)
737 vwarning (format, args);
742 /* Issue an error if the size of an object of type T is unreasonable,
743 i.e. if it would be a bad idea to allocate a value of this type in
747 ada_ensure_varsize_limit (const struct type *type)
749 if (TYPE_LENGTH (type) > varsize_limit)
750 error (_("object size is larger than varsize-limit"));
753 /* Maximum value of a SIZE-byte signed integer type. */
755 max_of_size (int size)
757 LONGEST top_bit = (LONGEST) 1 << (size * 8 - 2);
759 return top_bit | (top_bit - 1);
762 /* Minimum value of a SIZE-byte signed integer type. */
764 min_of_size (int size)
766 return -max_of_size (size) - 1;
769 /* Maximum value of a SIZE-byte unsigned integer type. */
771 umax_of_size (int size)
773 ULONGEST top_bit = (ULONGEST) 1 << (size * 8 - 1);
775 return top_bit | (top_bit - 1);
778 /* Maximum value of integral type T, as a signed quantity. */
780 max_of_type (struct type *t)
782 if (TYPE_UNSIGNED (t))
783 return (LONGEST) umax_of_size (TYPE_LENGTH (t));
785 return max_of_size (TYPE_LENGTH (t));
788 /* Minimum value of integral type T, as a signed quantity. */
790 min_of_type (struct type *t)
792 if (TYPE_UNSIGNED (t))
795 return min_of_size (TYPE_LENGTH (t));
798 /* The largest value in the domain of TYPE, a discrete type, as an integer. */
800 ada_discrete_type_high_bound (struct type *type)
802 type = resolve_dynamic_type (type, NULL, 0);
803 switch (TYPE_CODE (type))
805 case TYPE_CODE_RANGE:
806 return TYPE_HIGH_BOUND (type);
808 return TYPE_FIELD_ENUMVAL (type, TYPE_NFIELDS (type) - 1);
813 return max_of_type (type);
815 error (_("Unexpected type in ada_discrete_type_high_bound."));
819 /* The smallest value in the domain of TYPE, a discrete type, as an integer. */
821 ada_discrete_type_low_bound (struct type *type)
823 type = resolve_dynamic_type (type, NULL, 0);
824 switch (TYPE_CODE (type))
826 case TYPE_CODE_RANGE:
827 return TYPE_LOW_BOUND (type);
829 return TYPE_FIELD_ENUMVAL (type, 0);
834 return min_of_type (type);
836 error (_("Unexpected type in ada_discrete_type_low_bound."));
840 /* The identity on non-range types. For range types, the underlying
841 non-range scalar type. */
844 get_base_type (struct type *type)
846 while (type != NULL && TYPE_CODE (type) == TYPE_CODE_RANGE)
848 if (type == TYPE_TARGET_TYPE (type) || TYPE_TARGET_TYPE (type) == NULL)
850 type = TYPE_TARGET_TYPE (type);
855 /* Return a decoded version of the given VALUE. This means returning
856 a value whose type is obtained by applying all the GNAT-specific
857 encondings, making the resulting type a static but standard description
858 of the initial type. */
861 ada_get_decoded_value (struct value *value)
863 struct type *type = ada_check_typedef (value_type (value));
865 if (ada_is_array_descriptor_type (type)
866 || (ada_is_constrained_packed_array_type (type)
867 && TYPE_CODE (type) != TYPE_CODE_PTR))
869 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF) /* array access type. */
870 value = ada_coerce_to_simple_array_ptr (value);
872 value = ada_coerce_to_simple_array (value);
875 value = ada_to_fixed_value (value);
880 /* Same as ada_get_decoded_value, but with the given TYPE.
881 Because there is no associated actual value for this type,
882 the resulting type might be a best-effort approximation in
883 the case of dynamic types. */
886 ada_get_decoded_type (struct type *type)
888 type = to_static_fixed_type (type);
889 if (ada_is_constrained_packed_array_type (type))
890 type = ada_coerce_to_simple_array_type (type);
896 /* Language Selection */
898 /* If the main program is in Ada, return language_ada, otherwise return LANG
899 (the main program is in Ada iif the adainit symbol is found). */
902 ada_update_initial_language (enum language lang)
904 if (lookup_minimal_symbol ("adainit", (const char *) NULL,
905 (struct objfile *) NULL).minsym != NULL)
911 /* If the main procedure is written in Ada, then return its name.
912 The result is good until the next call. Return NULL if the main
913 procedure doesn't appear to be in Ada. */
918 struct bound_minimal_symbol msym;
919 static char *main_program_name = NULL;
921 /* For Ada, the name of the main procedure is stored in a specific
922 string constant, generated by the binder. Look for that symbol,
923 extract its address, and then read that string. If we didn't find
924 that string, then most probably the main procedure is not written
926 msym = lookup_minimal_symbol (ADA_MAIN_PROGRAM_SYMBOL_NAME, NULL, NULL);
928 if (msym.minsym != NULL)
930 CORE_ADDR main_program_name_addr;
933 main_program_name_addr = BMSYMBOL_VALUE_ADDRESS (msym);
934 if (main_program_name_addr == 0)
935 error (_("Invalid address for Ada main program name."));
937 xfree (main_program_name);
938 target_read_string (main_program_name_addr, &main_program_name,
943 return main_program_name;
946 /* The main procedure doesn't seem to be in Ada. */
952 /* Table of Ada operators and their GNAT-encoded names. Last entry is pair
955 const struct ada_opname_map ada_opname_table[] = {
956 {"Oadd", "\"+\"", BINOP_ADD},
957 {"Osubtract", "\"-\"", BINOP_SUB},
958 {"Omultiply", "\"*\"", BINOP_MUL},
959 {"Odivide", "\"/\"", BINOP_DIV},
960 {"Omod", "\"mod\"", BINOP_MOD},
961 {"Orem", "\"rem\"", BINOP_REM},
962 {"Oexpon", "\"**\"", BINOP_EXP},
963 {"Olt", "\"<\"", BINOP_LESS},
964 {"Ole", "\"<=\"", BINOP_LEQ},
965 {"Ogt", "\">\"", BINOP_GTR},
966 {"Oge", "\">=\"", BINOP_GEQ},
967 {"Oeq", "\"=\"", BINOP_EQUAL},
968 {"One", "\"/=\"", BINOP_NOTEQUAL},
969 {"Oand", "\"and\"", BINOP_BITWISE_AND},
970 {"Oor", "\"or\"", BINOP_BITWISE_IOR},
971 {"Oxor", "\"xor\"", BINOP_BITWISE_XOR},
972 {"Oconcat", "\"&\"", BINOP_CONCAT},
973 {"Oabs", "\"abs\"", UNOP_ABS},
974 {"Onot", "\"not\"", UNOP_LOGICAL_NOT},
975 {"Oadd", "\"+\"", UNOP_PLUS},
976 {"Osubtract", "\"-\"", UNOP_NEG},
980 /* The "encoded" form of DECODED, according to GNAT conventions.
981 The result is valid until the next call to ada_encode. */
984 ada_encode (const char *decoded)
986 static char *encoding_buffer = NULL;
987 static size_t encoding_buffer_size = 0;
994 GROW_VECT (encoding_buffer, encoding_buffer_size,
995 2 * strlen (decoded) + 10);
998 for (p = decoded; *p != '\0'; p += 1)
1002 encoding_buffer[k] = encoding_buffer[k + 1] = '_';
1007 const struct ada_opname_map *mapping;
1009 for (mapping = ada_opname_table;
1010 mapping->encoded != NULL
1011 && !startswith (p, mapping->decoded); mapping += 1)
1013 if (mapping->encoded == NULL)
1014 error (_("invalid Ada operator name: %s"), p);
1015 strcpy (encoding_buffer + k, mapping->encoded);
1016 k += strlen (mapping->encoded);
1021 encoding_buffer[k] = *p;
1026 encoding_buffer[k] = '\0';
1027 return encoding_buffer;
1030 /* Return NAME folded to lower case, or, if surrounded by single
1031 quotes, unfolded, but with the quotes stripped away. Result good
1035 ada_fold_name (const char *name)
1037 static char *fold_buffer = NULL;
1038 static size_t fold_buffer_size = 0;
1040 int len = strlen (name);
1041 GROW_VECT (fold_buffer, fold_buffer_size, len + 1);
1043 if (name[0] == '\'')
1045 strncpy (fold_buffer, name + 1, len - 2);
1046 fold_buffer[len - 2] = '\000';
1052 for (i = 0; i <= len; i += 1)
1053 fold_buffer[i] = tolower (name[i]);
1059 /* Return nonzero if C is either a digit or a lowercase alphabet character. */
1062 is_lower_alphanum (const char c)
1064 return (isdigit (c) || (isalpha (c) && islower (c)));
1067 /* ENCODED is the linkage name of a symbol and LEN contains its length.
1068 This function saves in LEN the length of that same symbol name but
1069 without either of these suffixes:
1075 These are suffixes introduced by the compiler for entities such as
1076 nested subprogram for instance, in order to avoid name clashes.
1077 They do not serve any purpose for the debugger. */
1080 ada_remove_trailing_digits (const char *encoded, int *len)
1082 if (*len > 1 && isdigit (encoded[*len - 1]))
1086 while (i > 0 && isdigit (encoded[i]))
1088 if (i >= 0 && encoded[i] == '.')
1090 else if (i >= 0 && encoded[i] == '$')
1092 else if (i >= 2 && startswith (encoded + i - 2, "___"))
1094 else if (i >= 1 && startswith (encoded + i - 1, "__"))
1099 /* Remove the suffix introduced by the compiler for protected object
1103 ada_remove_po_subprogram_suffix (const char *encoded, int *len)
1105 /* Remove trailing N. */
1107 /* Protected entry subprograms are broken into two
1108 separate subprograms: The first one is unprotected, and has
1109 a 'N' suffix; the second is the protected version, and has
1110 the 'P' suffix. The second calls the first one after handling
1111 the protection. Since the P subprograms are internally generated,
1112 we leave these names undecoded, giving the user a clue that this
1113 entity is internal. */
1116 && encoded[*len - 1] == 'N'
1117 && (isdigit (encoded[*len - 2]) || islower (encoded[*len - 2])))
1121 /* Remove trailing X[bn]* suffixes (indicating names in package bodies). */
1124 ada_remove_Xbn_suffix (const char *encoded, int *len)
1128 while (i > 0 && (encoded[i] == 'b' || encoded[i] == 'n'))
1131 if (encoded[i] != 'X')
1137 if (isalnum (encoded[i-1]))
1141 /* If ENCODED follows the GNAT entity encoding conventions, then return
1142 the decoded form of ENCODED. Otherwise, return "<%s>" where "%s" is
1143 replaced by ENCODED.
1145 The resulting string is valid until the next call of ada_decode.
1146 If the string is unchanged by decoding, the original string pointer
1150 ada_decode (const char *encoded)
1157 static char *decoding_buffer = NULL;
1158 static size_t decoding_buffer_size = 0;
1160 /* The name of the Ada main procedure starts with "_ada_".
1161 This prefix is not part of the decoded name, so skip this part
1162 if we see this prefix. */
1163 if (startswith (encoded, "_ada_"))
1166 /* If the name starts with '_', then it is not a properly encoded
1167 name, so do not attempt to decode it. Similarly, if the name
1168 starts with '<', the name should not be decoded. */
1169 if (encoded[0] == '_' || encoded[0] == '<')
1172 len0 = strlen (encoded);
1174 ada_remove_trailing_digits (encoded, &len0);
1175 ada_remove_po_subprogram_suffix (encoded, &len0);
1177 /* Remove the ___X.* suffix if present. Do not forget to verify that
1178 the suffix is located before the current "end" of ENCODED. We want
1179 to avoid re-matching parts of ENCODED that have previously been
1180 marked as discarded (by decrementing LEN0). */
1181 p = strstr (encoded, "___");
1182 if (p != NULL && p - encoded < len0 - 3)
1190 /* Remove any trailing TKB suffix. It tells us that this symbol
1191 is for the body of a task, but that information does not actually
1192 appear in the decoded name. */
1194 if (len0 > 3 && startswith (encoded + len0 - 3, "TKB"))
1197 /* Remove any trailing TB suffix. The TB suffix is slightly different
1198 from the TKB suffix because it is used for non-anonymous task
1201 if (len0 > 2 && startswith (encoded + len0 - 2, "TB"))
1204 /* Remove trailing "B" suffixes. */
1205 /* FIXME: brobecker/2006-04-19: Not sure what this are used for... */
1207 if (len0 > 1 && startswith (encoded + len0 - 1, "B"))
1210 /* Make decoded big enough for possible expansion by operator name. */
1212 GROW_VECT (decoding_buffer, decoding_buffer_size, 2 * len0 + 1);
1213 decoded = decoding_buffer;
1215 /* Remove trailing __{digit}+ or trailing ${digit}+. */
1217 if (len0 > 1 && isdigit (encoded[len0 - 1]))
1220 while ((i >= 0 && isdigit (encoded[i]))
1221 || (i >= 1 && encoded[i] == '_' && isdigit (encoded[i - 1])))
1223 if (i > 1 && encoded[i] == '_' && encoded[i - 1] == '_')
1225 else if (encoded[i] == '$')
1229 /* The first few characters that are not alphabetic are not part
1230 of any encoding we use, so we can copy them over verbatim. */
1232 for (i = 0, j = 0; i < len0 && !isalpha (encoded[i]); i += 1, j += 1)
1233 decoded[j] = encoded[i];
1238 /* Is this a symbol function? */
1239 if (at_start_name && encoded[i] == 'O')
1243 for (k = 0; ada_opname_table[k].encoded != NULL; k += 1)
1245 int op_len = strlen (ada_opname_table[k].encoded);
1246 if ((strncmp (ada_opname_table[k].encoded + 1, encoded + i + 1,
1248 && !isalnum (encoded[i + op_len]))
1250 strcpy (decoded + j, ada_opname_table[k].decoded);
1253 j += strlen (ada_opname_table[k].decoded);
1257 if (ada_opname_table[k].encoded != NULL)
1262 /* Replace "TK__" with "__", which will eventually be translated
1263 into "." (just below). */
1265 if (i < len0 - 4 && startswith (encoded + i, "TK__"))
1268 /* Replace "__B_{DIGITS}+__" sequences by "__", which will eventually
1269 be translated into "." (just below). These are internal names
1270 generated for anonymous blocks inside which our symbol is nested. */
1272 if (len0 - i > 5 && encoded [i] == '_' && encoded [i+1] == '_'
1273 && encoded [i+2] == 'B' && encoded [i+3] == '_'
1274 && isdigit (encoded [i+4]))
1278 while (k < len0 && isdigit (encoded[k]))
1279 k++; /* Skip any extra digit. */
1281 /* Double-check that the "__B_{DIGITS}+" sequence we found
1282 is indeed followed by "__". */
1283 if (len0 - k > 2 && encoded [k] == '_' && encoded [k+1] == '_')
1287 /* Remove _E{DIGITS}+[sb] */
1289 /* Just as for protected object subprograms, there are 2 categories
1290 of subprograms created by the compiler for each entry. The first
1291 one implements the actual entry code, and has a suffix following
1292 the convention above; the second one implements the barrier and
1293 uses the same convention as above, except that the 'E' is replaced
1296 Just as above, we do not decode the name of barrier functions
1297 to give the user a clue that the code he is debugging has been
1298 internally generated. */
1300 if (len0 - i > 3 && encoded [i] == '_' && encoded[i+1] == 'E'
1301 && isdigit (encoded[i+2]))
1305 while (k < len0 && isdigit (encoded[k]))
1309 && (encoded[k] == 'b' || encoded[k] == 's'))
1312 /* Just as an extra precaution, make sure that if this
1313 suffix is followed by anything else, it is a '_'.
1314 Otherwise, we matched this sequence by accident. */
1316 || (k < len0 && encoded[k] == '_'))
1321 /* Remove trailing "N" in [a-z0-9]+N__. The N is added by
1322 the GNAT front-end in protected object subprograms. */
1325 && encoded[i] == 'N' && encoded[i+1] == '_' && encoded[i+2] == '_')
1327 /* Backtrack a bit up until we reach either the begining of
1328 the encoded name, or "__". Make sure that we only find
1329 digits or lowercase characters. */
1330 const char *ptr = encoded + i - 1;
1332 while (ptr >= encoded && is_lower_alphanum (ptr[0]))
1335 || (ptr > encoded && ptr[0] == '_' && ptr[-1] == '_'))
1339 if (encoded[i] == 'X' && i != 0 && isalnum (encoded[i - 1]))
1341 /* This is a X[bn]* sequence not separated from the previous
1342 part of the name with a non-alpha-numeric character (in other
1343 words, immediately following an alpha-numeric character), then
1344 verify that it is placed at the end of the encoded name. If
1345 not, then the encoding is not valid and we should abort the
1346 decoding. Otherwise, just skip it, it is used in body-nested
1350 while (i < len0 && (encoded[i] == 'b' || encoded[i] == 'n'));
1354 else if (i < len0 - 2 && encoded[i] == '_' && encoded[i + 1] == '_')
1356 /* Replace '__' by '.'. */
1364 /* It's a character part of the decoded name, so just copy it
1366 decoded[j] = encoded[i];
1371 decoded[j] = '\000';
1373 /* Decoded names should never contain any uppercase character.
1374 Double-check this, and abort the decoding if we find one. */
1376 for (i = 0; decoded[i] != '\0'; i += 1)
1377 if (isupper (decoded[i]) || decoded[i] == ' ')
1380 if (strcmp (decoded, encoded) == 0)
1386 GROW_VECT (decoding_buffer, decoding_buffer_size, strlen (encoded) + 3);
1387 decoded = decoding_buffer;
1388 if (encoded[0] == '<')
1389 strcpy (decoded, encoded);
1391 xsnprintf (decoded, decoding_buffer_size, "<%s>", encoded);
1396 /* Table for keeping permanent unique copies of decoded names. Once
1397 allocated, names in this table are never released. While this is a
1398 storage leak, it should not be significant unless there are massive
1399 changes in the set of decoded names in successive versions of a
1400 symbol table loaded during a single session. */
1401 static struct htab *decoded_names_store;
1403 /* Returns the decoded name of GSYMBOL, as for ada_decode, caching it
1404 in the language-specific part of GSYMBOL, if it has not been
1405 previously computed. Tries to save the decoded name in the same
1406 obstack as GSYMBOL, if possible, and otherwise on the heap (so that,
1407 in any case, the decoded symbol has a lifetime at least that of
1409 The GSYMBOL parameter is "mutable" in the C++ sense: logically
1410 const, but nevertheless modified to a semantically equivalent form
1411 when a decoded name is cached in it. */
1414 ada_decode_symbol (const struct general_symbol_info *arg)
1416 struct general_symbol_info *gsymbol = (struct general_symbol_info *) arg;
1417 const char **resultp =
1418 &gsymbol->language_specific.demangled_name;
1420 if (!gsymbol->ada_mangled)
1422 const char *decoded = ada_decode (gsymbol->name);
1423 struct obstack *obstack = gsymbol->language_specific.obstack;
1425 gsymbol->ada_mangled = 1;
1427 if (obstack != NULL)
1429 = (const char *) obstack_copy0 (obstack, decoded, strlen (decoded));
1432 /* Sometimes, we can't find a corresponding objfile, in
1433 which case, we put the result on the heap. Since we only
1434 decode when needed, we hope this usually does not cause a
1435 significant memory leak (FIXME). */
1437 char **slot = (char **) htab_find_slot (decoded_names_store,
1441 *slot = xstrdup (decoded);
1450 ada_la_decode (const char *encoded, int options)
1452 return xstrdup (ada_decode (encoded));
1455 /* Implement la_sniff_from_mangled_name for Ada. */
1458 ada_sniff_from_mangled_name (const char *mangled, char **out)
1460 const char *demangled = ada_decode (mangled);
1464 if (demangled != mangled && demangled != NULL && demangled[0] != '<')
1466 /* Set the gsymbol language to Ada, but still return 0.
1467 Two reasons for that:
1469 1. For Ada, we prefer computing the symbol's decoded name
1470 on the fly rather than pre-compute it, in order to save
1471 memory (Ada projects are typically very large).
1473 2. There are some areas in the definition of the GNAT
1474 encoding where, with a bit of bad luck, we might be able
1475 to decode a non-Ada symbol, generating an incorrect
1476 demangled name (Eg: names ending with "TB" for instance
1477 are identified as task bodies and so stripped from
1478 the decoded name returned).
1480 Returning 1, here, but not setting *DEMANGLED, helps us get a
1481 little bit of the best of both worlds. Because we're last,
1482 we should not affect any of the other languages that were
1483 able to demangle the symbol before us; we get to correctly
1484 tag Ada symbols as such; and even if we incorrectly tagged a
1485 non-Ada symbol, which should be rare, any routing through the
1486 Ada language should be transparent (Ada tries to behave much
1487 like C/C++ with non-Ada symbols). */
1494 /* Returns non-zero iff SYM_NAME matches NAME, ignoring any trailing
1495 suffixes that encode debugging information or leading _ada_ on
1496 SYM_NAME (see is_name_suffix commentary for the debugging
1497 information that is ignored). If WILD, then NAME need only match a
1498 suffix of SYM_NAME minus the same suffixes. Also returns 0 if
1499 either argument is NULL. */
1502 match_name (const char *sym_name, const char *name, int wild)
1504 if (sym_name == NULL || name == NULL)
1507 return wild_match (sym_name, name) == 0;
1510 int len_name = strlen (name);
1512 return (strncmp (sym_name, name, len_name) == 0
1513 && is_name_suffix (sym_name + len_name))
1514 || (startswith (sym_name, "_ada_")
1515 && strncmp (sym_name + 5, name, len_name) == 0
1516 && is_name_suffix (sym_name + len_name + 5));
1523 /* Assuming that INDEX_DESC_TYPE is an ___XA structure, a structure
1524 generated by the GNAT compiler to describe the index type used
1525 for each dimension of an array, check whether it follows the latest
1526 known encoding. If not, fix it up to conform to the latest encoding.
1527 Otherwise, do nothing. This function also does nothing if
1528 INDEX_DESC_TYPE is NULL.
1530 The GNAT encoding used to describle the array index type evolved a bit.
1531 Initially, the information would be provided through the name of each
1532 field of the structure type only, while the type of these fields was
1533 described as unspecified and irrelevant. The debugger was then expected
1534 to perform a global type lookup using the name of that field in order
1535 to get access to the full index type description. Because these global
1536 lookups can be very expensive, the encoding was later enhanced to make
1537 the global lookup unnecessary by defining the field type as being
1538 the full index type description.
1540 The purpose of this routine is to allow us to support older versions
1541 of the compiler by detecting the use of the older encoding, and by
1542 fixing up the INDEX_DESC_TYPE to follow the new one (at this point,
1543 we essentially replace each field's meaningless type by the associated
1547 ada_fixup_array_indexes_type (struct type *index_desc_type)
1551 if (index_desc_type == NULL)
1553 gdb_assert (TYPE_NFIELDS (index_desc_type) > 0);
1555 /* Check if INDEX_DESC_TYPE follows the older encoding (it is sufficient
1556 to check one field only, no need to check them all). If not, return
1559 If our INDEX_DESC_TYPE was generated using the older encoding,
1560 the field type should be a meaningless integer type whose name
1561 is not equal to the field name. */
1562 if (TYPE_NAME (TYPE_FIELD_TYPE (index_desc_type, 0)) != NULL
1563 && strcmp (TYPE_NAME (TYPE_FIELD_TYPE (index_desc_type, 0)),
1564 TYPE_FIELD_NAME (index_desc_type, 0)) == 0)
1567 /* Fixup each field of INDEX_DESC_TYPE. */
1568 for (i = 0; i < TYPE_NFIELDS (index_desc_type); i++)
1570 const char *name = TYPE_FIELD_NAME (index_desc_type, i);
1571 struct type *raw_type = ada_check_typedef (ada_find_any_type (name));
1574 TYPE_FIELD_TYPE (index_desc_type, i) = raw_type;
1578 /* Names of MAX_ADA_DIMENS bounds in P_BOUNDS fields of array descriptors. */
1580 static char *bound_name[] = {
1581 "LB0", "UB0", "LB1", "UB1", "LB2", "UB2", "LB3", "UB3",
1582 "LB4", "UB4", "LB5", "UB5", "LB6", "UB6", "LB7", "UB7"
1585 /* Maximum number of array dimensions we are prepared to handle. */
1587 #define MAX_ADA_DIMENS (sizeof(bound_name) / (2*sizeof(char *)))
1590 /* The desc_* routines return primitive portions of array descriptors
1593 /* The descriptor or array type, if any, indicated by TYPE; removes
1594 level of indirection, if needed. */
1596 static struct type *
1597 desc_base_type (struct type *type)
1601 type = ada_check_typedef (type);
1602 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
1603 type = ada_typedef_target_type (type);
1606 && (TYPE_CODE (type) == TYPE_CODE_PTR
1607 || TYPE_CODE (type) == TYPE_CODE_REF))
1608 return ada_check_typedef (TYPE_TARGET_TYPE (type));
1613 /* True iff TYPE indicates a "thin" array pointer type. */
1616 is_thin_pntr (struct type *type)
1619 is_suffix (ada_type_name (desc_base_type (type)), "___XUT")
1620 || is_suffix (ada_type_name (desc_base_type (type)), "___XUT___XVE");
1623 /* The descriptor type for thin pointer type TYPE. */
1625 static struct type *
1626 thin_descriptor_type (struct type *type)
1628 struct type *base_type = desc_base_type (type);
1630 if (base_type == NULL)
1632 if (is_suffix (ada_type_name (base_type), "___XVE"))
1636 struct type *alt_type = ada_find_parallel_type (base_type, "___XVE");
1638 if (alt_type == NULL)
1645 /* A pointer to the array data for thin-pointer value VAL. */
1647 static struct value *
1648 thin_data_pntr (struct value *val)
1650 struct type *type = ada_check_typedef (value_type (val));
1651 struct type *data_type = desc_data_target_type (thin_descriptor_type (type));
1653 data_type = lookup_pointer_type (data_type);
1655 if (TYPE_CODE (type) == TYPE_CODE_PTR)
1656 return value_cast (data_type, value_copy (val));
1658 return value_from_longest (data_type, value_address (val));
1661 /* True iff TYPE indicates a "thick" array pointer type. */
1664 is_thick_pntr (struct type *type)
1666 type = desc_base_type (type);
1667 return (type != NULL && TYPE_CODE (type) == TYPE_CODE_STRUCT
1668 && lookup_struct_elt_type (type, "P_BOUNDS", 1) != NULL);
1671 /* If TYPE is the type of an array descriptor (fat or thin pointer) or a
1672 pointer to one, the type of its bounds data; otherwise, NULL. */
1674 static struct type *
1675 desc_bounds_type (struct type *type)
1679 type = desc_base_type (type);
1683 else if (is_thin_pntr (type))
1685 type = thin_descriptor_type (type);
1688 r = lookup_struct_elt_type (type, "BOUNDS", 1);
1690 return ada_check_typedef (r);
1692 else if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
1694 r = lookup_struct_elt_type (type, "P_BOUNDS", 1);
1696 return ada_check_typedef (TYPE_TARGET_TYPE (ada_check_typedef (r)));
1701 /* If ARR is an array descriptor (fat or thin pointer), or pointer to
1702 one, a pointer to its bounds data. Otherwise NULL. */
1704 static struct value *
1705 desc_bounds (struct value *arr)
1707 struct type *type = ada_check_typedef (value_type (arr));
1709 if (is_thin_pntr (type))
1711 struct type *bounds_type =
1712 desc_bounds_type (thin_descriptor_type (type));
1715 if (bounds_type == NULL)
1716 error (_("Bad GNAT array descriptor"));
1718 /* NOTE: The following calculation is not really kosher, but
1719 since desc_type is an XVE-encoded type (and shouldn't be),
1720 the correct calculation is a real pain. FIXME (and fix GCC). */
1721 if (TYPE_CODE (type) == TYPE_CODE_PTR)
1722 addr = value_as_long (arr);
1724 addr = value_address (arr);
1727 value_from_longest (lookup_pointer_type (bounds_type),
1728 addr - TYPE_LENGTH (bounds_type));
1731 else if (is_thick_pntr (type))
1733 struct value *p_bounds = value_struct_elt (&arr, NULL, "P_BOUNDS", NULL,
1734 _("Bad GNAT array descriptor"));
1735 struct type *p_bounds_type = value_type (p_bounds);
1738 && TYPE_CODE (p_bounds_type) == TYPE_CODE_PTR)
1740 struct type *target_type = TYPE_TARGET_TYPE (p_bounds_type);
1742 if (TYPE_STUB (target_type))
1743 p_bounds = value_cast (lookup_pointer_type
1744 (ada_check_typedef (target_type)),
1748 error (_("Bad GNAT array descriptor"));
1756 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1757 position of the field containing the address of the bounds data. */
1760 fat_pntr_bounds_bitpos (struct type *type)
1762 return TYPE_FIELD_BITPOS (desc_base_type (type), 1);
1765 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1766 size of the field containing the address of the bounds data. */
1769 fat_pntr_bounds_bitsize (struct type *type)
1771 type = desc_base_type (type);
1773 if (TYPE_FIELD_BITSIZE (type, 1) > 0)
1774 return TYPE_FIELD_BITSIZE (type, 1);
1776 return 8 * TYPE_LENGTH (ada_check_typedef (TYPE_FIELD_TYPE (type, 1)));
1779 /* If TYPE is the type of an array descriptor (fat or thin pointer) or a
1780 pointer to one, the type of its array data (a array-with-no-bounds type);
1781 otherwise, NULL. Use ada_type_of_array to get an array type with bounds
1784 static struct type *
1785 desc_data_target_type (struct type *type)
1787 type = desc_base_type (type);
1789 /* NOTE: The following is bogus; see comment in desc_bounds. */
1790 if (is_thin_pntr (type))
1791 return desc_base_type (TYPE_FIELD_TYPE (thin_descriptor_type (type), 1));
1792 else if (is_thick_pntr (type))
1794 struct type *data_type = lookup_struct_elt_type (type, "P_ARRAY", 1);
1797 && TYPE_CODE (ada_check_typedef (data_type)) == TYPE_CODE_PTR)
1798 return ada_check_typedef (TYPE_TARGET_TYPE (data_type));
1804 /* If ARR is an array descriptor (fat or thin pointer), a pointer to
1807 static struct value *
1808 desc_data (struct value *arr)
1810 struct type *type = value_type (arr);
1812 if (is_thin_pntr (type))
1813 return thin_data_pntr (arr);
1814 else if (is_thick_pntr (type))
1815 return value_struct_elt (&arr, NULL, "P_ARRAY", NULL,
1816 _("Bad GNAT array descriptor"));
1822 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1823 position of the field containing the address of the data. */
1826 fat_pntr_data_bitpos (struct type *type)
1828 return TYPE_FIELD_BITPOS (desc_base_type (type), 0);
1831 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1832 size of the field containing the address of the data. */
1835 fat_pntr_data_bitsize (struct type *type)
1837 type = desc_base_type (type);
1839 if (TYPE_FIELD_BITSIZE (type, 0) > 0)
1840 return TYPE_FIELD_BITSIZE (type, 0);
1842 return TARGET_CHAR_BIT * TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0));
1845 /* If BOUNDS is an array-bounds structure (or pointer to one), return
1846 the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
1847 bound, if WHICH is 1. The first bound is I=1. */
1849 static struct value *
1850 desc_one_bound (struct value *bounds, int i, int which)
1852 return value_struct_elt (&bounds, NULL, bound_name[2 * i + which - 2], NULL,
1853 _("Bad GNAT array descriptor bounds"));
1856 /* If BOUNDS is an array-bounds structure type, return the bit position
1857 of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
1858 bound, if WHICH is 1. The first bound is I=1. */
1861 desc_bound_bitpos (struct type *type, int i, int which)
1863 return TYPE_FIELD_BITPOS (desc_base_type (type), 2 * i + which - 2);
1866 /* If BOUNDS is an array-bounds structure type, return the bit field size
1867 of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
1868 bound, if WHICH is 1. The first bound is I=1. */
1871 desc_bound_bitsize (struct type *type, int i, int which)
1873 type = desc_base_type (type);
1875 if (TYPE_FIELD_BITSIZE (type, 2 * i + which - 2) > 0)
1876 return TYPE_FIELD_BITSIZE (type, 2 * i + which - 2);
1878 return 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (type, 2 * i + which - 2));
1881 /* If TYPE is the type of an array-bounds structure, the type of its
1882 Ith bound (numbering from 1). Otherwise, NULL. */
1884 static struct type *
1885 desc_index_type (struct type *type, int i)
1887 type = desc_base_type (type);
1889 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
1890 return lookup_struct_elt_type (type, bound_name[2 * i - 2], 1);
1895 /* The number of index positions in the array-bounds type TYPE.
1896 Return 0 if TYPE is NULL. */
1899 desc_arity (struct type *type)
1901 type = desc_base_type (type);
1904 return TYPE_NFIELDS (type) / 2;
1908 /* Non-zero iff TYPE is a simple array type (not a pointer to one) or
1909 an array descriptor type (representing an unconstrained array
1913 ada_is_direct_array_type (struct type *type)
1917 type = ada_check_typedef (type);
1918 return (TYPE_CODE (type) == TYPE_CODE_ARRAY
1919 || ada_is_array_descriptor_type (type));
1922 /* Non-zero iff TYPE represents any kind of array in Ada, or a pointer
1926 ada_is_array_type (struct type *type)
1929 && (TYPE_CODE (type) == TYPE_CODE_PTR
1930 || TYPE_CODE (type) == TYPE_CODE_REF))
1931 type = TYPE_TARGET_TYPE (type);
1932 return ada_is_direct_array_type (type);
1935 /* Non-zero iff TYPE is a simple array type or pointer to one. */
1938 ada_is_simple_array_type (struct type *type)
1942 type = ada_check_typedef (type);
1943 return (TYPE_CODE (type) == TYPE_CODE_ARRAY
1944 || (TYPE_CODE (type) == TYPE_CODE_PTR
1945 && TYPE_CODE (ada_check_typedef (TYPE_TARGET_TYPE (type)))
1946 == TYPE_CODE_ARRAY));
1949 /* Non-zero iff TYPE belongs to a GNAT array descriptor. */
1952 ada_is_array_descriptor_type (struct type *type)
1954 struct type *data_type = desc_data_target_type (type);
1958 type = ada_check_typedef (type);
1959 return (data_type != NULL
1960 && TYPE_CODE (data_type) == TYPE_CODE_ARRAY
1961 && desc_arity (desc_bounds_type (type)) > 0);
1964 /* Non-zero iff type is a partially mal-formed GNAT array
1965 descriptor. FIXME: This is to compensate for some problems with
1966 debugging output from GNAT. Re-examine periodically to see if it
1970 ada_is_bogus_array_descriptor (struct type *type)
1974 && TYPE_CODE (type) == TYPE_CODE_STRUCT
1975 && (lookup_struct_elt_type (type, "P_BOUNDS", 1) != NULL
1976 || lookup_struct_elt_type (type, "P_ARRAY", 1) != NULL)
1977 && !ada_is_array_descriptor_type (type);
1981 /* If ARR has a record type in the form of a standard GNAT array descriptor,
1982 (fat pointer) returns the type of the array data described---specifically,
1983 a pointer-to-array type. If BOUNDS is non-zero, the bounds data are filled
1984 in from the descriptor; otherwise, they are left unspecified. If
1985 the ARR denotes a null array descriptor and BOUNDS is non-zero,
1986 returns NULL. The result is simply the type of ARR if ARR is not
1989 ada_type_of_array (struct value *arr, int bounds)
1991 if (ada_is_constrained_packed_array_type (value_type (arr)))
1992 return decode_constrained_packed_array_type (value_type (arr));
1994 if (!ada_is_array_descriptor_type (value_type (arr)))
1995 return value_type (arr);
1999 struct type *array_type =
2000 ada_check_typedef (desc_data_target_type (value_type (arr)));
2002 if (ada_is_unconstrained_packed_array_type (value_type (arr)))
2003 TYPE_FIELD_BITSIZE (array_type, 0) =
2004 decode_packed_array_bitsize (value_type (arr));
2010 struct type *elt_type;
2012 struct value *descriptor;
2014 elt_type = ada_array_element_type (value_type (arr), -1);
2015 arity = ada_array_arity (value_type (arr));
2017 if (elt_type == NULL || arity == 0)
2018 return ada_check_typedef (value_type (arr));
2020 descriptor = desc_bounds (arr);
2021 if (value_as_long (descriptor) == 0)
2025 struct type *range_type = alloc_type_copy (value_type (arr));
2026 struct type *array_type = alloc_type_copy (value_type (arr));
2027 struct value *low = desc_one_bound (descriptor, arity, 0);
2028 struct value *high = desc_one_bound (descriptor, arity, 1);
2031 create_static_range_type (range_type, value_type (low),
2032 longest_to_int (value_as_long (low)),
2033 longest_to_int (value_as_long (high)));
2034 elt_type = create_array_type (array_type, elt_type, range_type);
2036 if (ada_is_unconstrained_packed_array_type (value_type (arr)))
2038 /* We need to store the element packed bitsize, as well as
2039 recompute the array size, because it was previously
2040 computed based on the unpacked element size. */
2041 LONGEST lo = value_as_long (low);
2042 LONGEST hi = value_as_long (high);
2044 TYPE_FIELD_BITSIZE (elt_type, 0) =
2045 decode_packed_array_bitsize (value_type (arr));
2046 /* If the array has no element, then the size is already
2047 zero, and does not need to be recomputed. */
2051 (hi - lo + 1) * TYPE_FIELD_BITSIZE (elt_type, 0);
2053 TYPE_LENGTH (array_type) = (array_bitsize + 7) / 8;
2058 return lookup_pointer_type (elt_type);
2062 /* If ARR does not represent an array, returns ARR unchanged.
2063 Otherwise, returns either a standard GDB array with bounds set
2064 appropriately or, if ARR is a non-null fat pointer, a pointer to a standard
2065 GDB array. Returns NULL if ARR is a null fat pointer. */
2068 ada_coerce_to_simple_array_ptr (struct value *arr)
2070 if (ada_is_array_descriptor_type (value_type (arr)))
2072 struct type *arrType = ada_type_of_array (arr, 1);
2074 if (arrType == NULL)
2076 return value_cast (arrType, value_copy (desc_data (arr)));
2078 else if (ada_is_constrained_packed_array_type (value_type (arr)))
2079 return decode_constrained_packed_array (arr);
2084 /* If ARR does not represent an array, returns ARR unchanged.
2085 Otherwise, returns a standard GDB array describing ARR (which may
2086 be ARR itself if it already is in the proper form). */
2089 ada_coerce_to_simple_array (struct value *arr)
2091 if (ada_is_array_descriptor_type (value_type (arr)))
2093 struct value *arrVal = ada_coerce_to_simple_array_ptr (arr);
2096 error (_("Bounds unavailable for null array pointer."));
2097 ada_ensure_varsize_limit (TYPE_TARGET_TYPE (value_type (arrVal)));
2098 return value_ind (arrVal);
2100 else if (ada_is_constrained_packed_array_type (value_type (arr)))
2101 return decode_constrained_packed_array (arr);
2106 /* If TYPE represents a GNAT array type, return it translated to an
2107 ordinary GDB array type (possibly with BITSIZE fields indicating
2108 packing). For other types, is the identity. */
2111 ada_coerce_to_simple_array_type (struct type *type)
2113 if (ada_is_constrained_packed_array_type (type))
2114 return decode_constrained_packed_array_type (type);
2116 if (ada_is_array_descriptor_type (type))
2117 return ada_check_typedef (desc_data_target_type (type));
2122 /* Non-zero iff TYPE represents a standard GNAT packed-array type. */
2125 ada_is_packed_array_type (struct type *type)
2129 type = desc_base_type (type);
2130 type = ada_check_typedef (type);
2132 ada_type_name (type) != NULL
2133 && strstr (ada_type_name (type), "___XP") != NULL;
2136 /* Non-zero iff TYPE represents a standard GNAT constrained
2137 packed-array type. */
2140 ada_is_constrained_packed_array_type (struct type *type)
2142 return ada_is_packed_array_type (type)
2143 && !ada_is_array_descriptor_type (type);
2146 /* Non-zero iff TYPE represents an array descriptor for a
2147 unconstrained packed-array type. */
2150 ada_is_unconstrained_packed_array_type (struct type *type)
2152 return ada_is_packed_array_type (type)
2153 && ada_is_array_descriptor_type (type);
2156 /* Given that TYPE encodes a packed array type (constrained or unconstrained),
2157 return the size of its elements in bits. */
2160 decode_packed_array_bitsize (struct type *type)
2162 const char *raw_name;
2166 /* Access to arrays implemented as fat pointers are encoded as a typedef
2167 of the fat pointer type. We need the name of the fat pointer type
2168 to do the decoding, so strip the typedef layer. */
2169 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
2170 type = ada_typedef_target_type (type);
2172 raw_name = ada_type_name (ada_check_typedef (type));
2174 raw_name = ada_type_name (desc_base_type (type));
2179 tail = strstr (raw_name, "___XP");
2180 gdb_assert (tail != NULL);
2182 if (sscanf (tail + sizeof ("___XP") - 1, "%ld", &bits) != 1)
2185 (_("could not understand bit size information on packed array"));
2192 /* Given that TYPE is a standard GDB array type with all bounds filled
2193 in, and that the element size of its ultimate scalar constituents
2194 (that is, either its elements, or, if it is an array of arrays, its
2195 elements' elements, etc.) is *ELT_BITS, return an identical type,
2196 but with the bit sizes of its elements (and those of any
2197 constituent arrays) recorded in the BITSIZE components of its
2198 TYPE_FIELD_BITSIZE values, and with *ELT_BITS set to its total size
2201 Note that, for arrays whose index type has an XA encoding where
2202 a bound references a record discriminant, getting that discriminant,
2203 and therefore the actual value of that bound, is not possible
2204 because none of the given parameters gives us access to the record.
2205 This function assumes that it is OK in the context where it is being
2206 used to return an array whose bounds are still dynamic and where
2207 the length is arbitrary. */
2209 static struct type *
2210 constrained_packed_array_type (struct type *type, long *elt_bits)
2212 struct type *new_elt_type;
2213 struct type *new_type;
2214 struct type *index_type_desc;
2215 struct type *index_type;
2216 LONGEST low_bound, high_bound;
2218 type = ada_check_typedef (type);
2219 if (TYPE_CODE (type) != TYPE_CODE_ARRAY)
2222 index_type_desc = ada_find_parallel_type (type, "___XA");
2223 if (index_type_desc)
2224 index_type = to_fixed_range_type (TYPE_FIELD_TYPE (index_type_desc, 0),
2227 index_type = TYPE_INDEX_TYPE (type);
2229 new_type = alloc_type_copy (type);
2231 constrained_packed_array_type (ada_check_typedef (TYPE_TARGET_TYPE (type)),
2233 create_array_type (new_type, new_elt_type, index_type);
2234 TYPE_FIELD_BITSIZE (new_type, 0) = *elt_bits;
2235 TYPE_NAME (new_type) = ada_type_name (type);
2237 if ((TYPE_CODE (check_typedef (index_type)) == TYPE_CODE_RANGE
2238 && is_dynamic_type (check_typedef (index_type)))
2239 || get_discrete_bounds (index_type, &low_bound, &high_bound) < 0)
2240 low_bound = high_bound = 0;
2241 if (high_bound < low_bound)
2242 *elt_bits = TYPE_LENGTH (new_type) = 0;
2245 *elt_bits *= (high_bound - low_bound + 1);
2246 TYPE_LENGTH (new_type) =
2247 (*elt_bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT;
2250 TYPE_FIXED_INSTANCE (new_type) = 1;
2254 /* The array type encoded by TYPE, where
2255 ada_is_constrained_packed_array_type (TYPE). */
2257 static struct type *
2258 decode_constrained_packed_array_type (struct type *type)
2260 const char *raw_name = ada_type_name (ada_check_typedef (type));
2263 struct type *shadow_type;
2267 raw_name = ada_type_name (desc_base_type (type));
2272 name = (char *) alloca (strlen (raw_name) + 1);
2273 tail = strstr (raw_name, "___XP");
2274 type = desc_base_type (type);
2276 memcpy (name, raw_name, tail - raw_name);
2277 name[tail - raw_name] = '\000';
2279 shadow_type = ada_find_parallel_type_with_name (type, name);
2281 if (shadow_type == NULL)
2283 lim_warning (_("could not find bounds information on packed array"));
2286 shadow_type = check_typedef (shadow_type);
2288 if (TYPE_CODE (shadow_type) != TYPE_CODE_ARRAY)
2290 lim_warning (_("could not understand bounds "
2291 "information on packed array"));
2295 bits = decode_packed_array_bitsize (type);
2296 return constrained_packed_array_type (shadow_type, &bits);
2299 /* Given that ARR is a struct value *indicating a GNAT constrained packed
2300 array, returns a simple array that denotes that array. Its type is a
2301 standard GDB array type except that the BITSIZEs of the array
2302 target types are set to the number of bits in each element, and the
2303 type length is set appropriately. */
2305 static struct value *
2306 decode_constrained_packed_array (struct value *arr)
2310 /* If our value is a pointer, then dereference it. Likewise if
2311 the value is a reference. Make sure that this operation does not
2312 cause the target type to be fixed, as this would indirectly cause
2313 this array to be decoded. The rest of the routine assumes that
2314 the array hasn't been decoded yet, so we use the basic "coerce_ref"
2315 and "value_ind" routines to perform the dereferencing, as opposed
2316 to using "ada_coerce_ref" or "ada_value_ind". */
2317 arr = coerce_ref (arr);
2318 if (TYPE_CODE (ada_check_typedef (value_type (arr))) == TYPE_CODE_PTR)
2319 arr = value_ind (arr);
2321 type = decode_constrained_packed_array_type (value_type (arr));
2324 error (_("can't unpack array"));
2328 if (gdbarch_bits_big_endian (get_type_arch (value_type (arr)))
2329 && ada_is_modular_type (value_type (arr)))
2331 /* This is a (right-justified) modular type representing a packed
2332 array with no wrapper. In order to interpret the value through
2333 the (left-justified) packed array type we just built, we must
2334 first left-justify it. */
2335 int bit_size, bit_pos;
2338 mod = ada_modulus (value_type (arr)) - 1;
2345 bit_pos = HOST_CHAR_BIT * TYPE_LENGTH (value_type (arr)) - bit_size;
2346 arr = ada_value_primitive_packed_val (arr, NULL,
2347 bit_pos / HOST_CHAR_BIT,
2348 bit_pos % HOST_CHAR_BIT,
2353 return coerce_unspec_val_to_type (arr, type);
2357 /* The value of the element of packed array ARR at the ARITY indices
2358 given in IND. ARR must be a simple array. */
2360 static struct value *
2361 value_subscript_packed (struct value *arr, int arity, struct value **ind)
2364 int bits, elt_off, bit_off;
2365 long elt_total_bit_offset;
2366 struct type *elt_type;
2370 elt_total_bit_offset = 0;
2371 elt_type = ada_check_typedef (value_type (arr));
2372 for (i = 0; i < arity; i += 1)
2374 if (TYPE_CODE (elt_type) != TYPE_CODE_ARRAY
2375 || TYPE_FIELD_BITSIZE (elt_type, 0) == 0)
2377 (_("attempt to do packed indexing of "
2378 "something other than a packed array"));
2381 struct type *range_type = TYPE_INDEX_TYPE (elt_type);
2382 LONGEST lowerbound, upperbound;
2385 if (get_discrete_bounds (range_type, &lowerbound, &upperbound) < 0)
2387 lim_warning (_("don't know bounds of array"));
2388 lowerbound = upperbound = 0;
2391 idx = pos_atr (ind[i]);
2392 if (idx < lowerbound || idx > upperbound)
2393 lim_warning (_("packed array index %ld out of bounds"),
2395 bits = TYPE_FIELD_BITSIZE (elt_type, 0);
2396 elt_total_bit_offset += (idx - lowerbound) * bits;
2397 elt_type = ada_check_typedef (TYPE_TARGET_TYPE (elt_type));
2400 elt_off = elt_total_bit_offset / HOST_CHAR_BIT;
2401 bit_off = elt_total_bit_offset % HOST_CHAR_BIT;
2403 v = ada_value_primitive_packed_val (arr, NULL, elt_off, bit_off,
2408 /* Non-zero iff TYPE includes negative integer values. */
2411 has_negatives (struct type *type)
2413 switch (TYPE_CODE (type))
2418 return !TYPE_UNSIGNED (type);
2419 case TYPE_CODE_RANGE:
2420 return TYPE_LOW_BOUND (type) < 0;
2424 /* With SRC being a buffer containing BIT_SIZE bits of data at BIT_OFFSET,
2425 unpack that data into UNPACKED. UNPACKED_LEN is the size in bytes of
2426 the unpacked buffer.
2428 The size of the unpacked buffer (UNPACKED_LEN) is expected to be large
2429 enough to contain at least BIT_OFFSET bits. If not, an error is raised.
2431 IS_BIG_ENDIAN is nonzero if the data is stored in big endian mode,
2434 IS_SIGNED_TYPE is nonzero if the data corresponds to a signed type.
2436 IS_SCALAR is nonzero if the data corresponds to a signed type. */
2439 ada_unpack_from_contents (const gdb_byte *src, int bit_offset, int bit_size,
2440 gdb_byte *unpacked, int unpacked_len,
2441 int is_big_endian, int is_signed_type,
2444 int src_len = (bit_size + bit_offset + HOST_CHAR_BIT - 1) / 8;
2445 int src_idx; /* Index into the source area */
2446 int src_bytes_left; /* Number of source bytes left to process. */
2447 int srcBitsLeft; /* Number of source bits left to move */
2448 int unusedLS; /* Number of bits in next significant
2449 byte of source that are unused */
2451 int unpacked_idx; /* Index into the unpacked buffer */
2452 int unpacked_bytes_left; /* Number of bytes left to set in unpacked. */
2454 unsigned long accum; /* Staging area for bits being transferred */
2455 int accumSize; /* Number of meaningful bits in accum */
2458 /* Transmit bytes from least to most significant; delta is the direction
2459 the indices move. */
2460 int delta = is_big_endian ? -1 : 1;
2462 /* Make sure that unpacked is large enough to receive the BIT_SIZE
2464 if ((bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT > unpacked_len)
2465 error (_("Cannot unpack %d bits into buffer of %d bytes"),
2466 bit_size, unpacked_len);
2468 srcBitsLeft = bit_size;
2469 src_bytes_left = src_len;
2470 unpacked_bytes_left = unpacked_len;
2475 src_idx = src_len - 1;
2477 && ((src[0] << bit_offset) & (1 << (HOST_CHAR_BIT - 1))))
2481 (HOST_CHAR_BIT - (bit_size + bit_offset) % HOST_CHAR_BIT)
2487 unpacked_idx = unpacked_len - 1;
2491 /* Non-scalar values must be aligned at a byte boundary... */
2493 (HOST_CHAR_BIT - bit_size % HOST_CHAR_BIT) % HOST_CHAR_BIT;
2494 /* ... And are placed at the beginning (most-significant) bytes
2496 unpacked_idx = (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT - 1;
2497 unpacked_bytes_left = unpacked_idx + 1;
2502 int sign_bit_offset = (bit_size + bit_offset - 1) % 8;
2504 src_idx = unpacked_idx = 0;
2505 unusedLS = bit_offset;
2508 if (is_signed_type && (src[src_len - 1] & (1 << sign_bit_offset)))
2513 while (src_bytes_left > 0)
2515 /* Mask for removing bits of the next source byte that are not
2516 part of the value. */
2517 unsigned int unusedMSMask =
2518 (1 << (srcBitsLeft >= HOST_CHAR_BIT ? HOST_CHAR_BIT : srcBitsLeft)) -
2520 /* Sign-extend bits for this byte. */
2521 unsigned int signMask = sign & ~unusedMSMask;
2524 (((src[src_idx] >> unusedLS) & unusedMSMask) | signMask) << accumSize;
2525 accumSize += HOST_CHAR_BIT - unusedLS;
2526 if (accumSize >= HOST_CHAR_BIT)
2528 unpacked[unpacked_idx] = accum & ~(~0UL << HOST_CHAR_BIT);
2529 accumSize -= HOST_CHAR_BIT;
2530 accum >>= HOST_CHAR_BIT;
2531 unpacked_bytes_left -= 1;
2532 unpacked_idx += delta;
2534 srcBitsLeft -= HOST_CHAR_BIT - unusedLS;
2536 src_bytes_left -= 1;
2539 while (unpacked_bytes_left > 0)
2541 accum |= sign << accumSize;
2542 unpacked[unpacked_idx] = accum & ~(~0UL << HOST_CHAR_BIT);
2543 accumSize -= HOST_CHAR_BIT;
2546 accum >>= HOST_CHAR_BIT;
2547 unpacked_bytes_left -= 1;
2548 unpacked_idx += delta;
2552 /* Create a new value of type TYPE from the contents of OBJ starting
2553 at byte OFFSET, and bit offset BIT_OFFSET within that byte,
2554 proceeding for BIT_SIZE bits. If OBJ is an lval in memory, then
2555 assigning through the result will set the field fetched from.
2556 VALADDR is ignored unless OBJ is NULL, in which case,
2557 VALADDR+OFFSET must address the start of storage containing the
2558 packed value. The value returned in this case is never an lval.
2559 Assumes 0 <= BIT_OFFSET < HOST_CHAR_BIT. */
2562 ada_value_primitive_packed_val (struct value *obj, const gdb_byte *valaddr,
2563 long offset, int bit_offset, int bit_size,
2567 const gdb_byte *src; /* First byte containing data to unpack */
2569 const int is_scalar = is_scalar_type (type);
2570 const int is_big_endian = gdbarch_bits_big_endian (get_type_arch (type));
2571 std::unique_ptr<gdb_byte[]> staging;
2572 int staging_len = 0;
2574 type = ada_check_typedef (type);
2577 src = valaddr + offset;
2579 src = value_contents (obj) + offset;
2581 if (is_dynamic_type (type))
2583 /* The length of TYPE might by dynamic, so we need to resolve
2584 TYPE in order to know its actual size, which we then use
2585 to create the contents buffer of the value we return.
2586 The difficulty is that the data containing our object is
2587 packed, and therefore maybe not at a byte boundary. So, what
2588 we do, is unpack the data into a byte-aligned buffer, and then
2589 use that buffer as our object's value for resolving the type. */
2590 staging_len = (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT;
2591 staging.reset (new gdb_byte[staging_len]);
2593 ada_unpack_from_contents (src, bit_offset, bit_size,
2594 staging.get (), staging_len,
2595 is_big_endian, has_negatives (type),
2597 type = resolve_dynamic_type (type, staging.get (), 0);
2598 if (TYPE_LENGTH (type) < (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT)
2600 /* This happens when the length of the object is dynamic,
2601 and is actually smaller than the space reserved for it.
2602 For instance, in an array of variant records, the bit_size
2603 we're given is the array stride, which is constant and
2604 normally equal to the maximum size of its element.
2605 But, in reality, each element only actually spans a portion
2607 bit_size = TYPE_LENGTH (type) * HOST_CHAR_BIT;
2613 v = allocate_value (type);
2614 src = valaddr + offset;
2616 else if (VALUE_LVAL (obj) == lval_memory && value_lazy (obj))
2618 int src_len = (bit_size + bit_offset + HOST_CHAR_BIT - 1) / 8;
2621 v = value_at (type, value_address (obj) + offset);
2622 buf = (gdb_byte *) alloca (src_len);
2623 read_memory (value_address (v), buf, src_len);
2628 v = allocate_value (type);
2629 src = value_contents (obj) + offset;
2634 long new_offset = offset;
2636 set_value_component_location (v, obj);
2637 set_value_bitpos (v, bit_offset + value_bitpos (obj));
2638 set_value_bitsize (v, bit_size);
2639 if (value_bitpos (v) >= HOST_CHAR_BIT)
2642 set_value_bitpos (v, value_bitpos (v) - HOST_CHAR_BIT);
2644 set_value_offset (v, new_offset);
2646 /* Also set the parent value. This is needed when trying to
2647 assign a new value (in inferior memory). */
2648 set_value_parent (v, obj);
2651 set_value_bitsize (v, bit_size);
2652 unpacked = value_contents_writeable (v);
2656 memset (unpacked, 0, TYPE_LENGTH (type));
2660 if (staging != NULL && staging_len == TYPE_LENGTH (type))
2662 /* Small short-cut: If we've unpacked the data into a buffer
2663 of the same size as TYPE's length, then we can reuse that,
2664 instead of doing the unpacking again. */
2665 memcpy (unpacked, staging.get (), staging_len);
2668 ada_unpack_from_contents (src, bit_offset, bit_size,
2669 unpacked, TYPE_LENGTH (type),
2670 is_big_endian, has_negatives (type), is_scalar);
2675 /* Move N bits from SOURCE, starting at bit offset SRC_OFFSET to
2676 TARGET, starting at bit offset TARG_OFFSET. SOURCE and TARGET must
2679 move_bits (gdb_byte *target, int targ_offset, const gdb_byte *source,
2680 int src_offset, int n, int bits_big_endian_p)
2682 unsigned int accum, mask;
2683 int accum_bits, chunk_size;
2685 target += targ_offset / HOST_CHAR_BIT;
2686 targ_offset %= HOST_CHAR_BIT;
2687 source += src_offset / HOST_CHAR_BIT;
2688 src_offset %= HOST_CHAR_BIT;
2689 if (bits_big_endian_p)
2691 accum = (unsigned char) *source;
2693 accum_bits = HOST_CHAR_BIT - src_offset;
2699 accum = (accum << HOST_CHAR_BIT) + (unsigned char) *source;
2700 accum_bits += HOST_CHAR_BIT;
2702 chunk_size = HOST_CHAR_BIT - targ_offset;
2705 unused_right = HOST_CHAR_BIT - (chunk_size + targ_offset);
2706 mask = ((1 << chunk_size) - 1) << unused_right;
2709 | ((accum >> (accum_bits - chunk_size - unused_right)) & mask);
2711 accum_bits -= chunk_size;
2718 accum = (unsigned char) *source >> src_offset;
2720 accum_bits = HOST_CHAR_BIT - src_offset;
2724 accum = accum + ((unsigned char) *source << accum_bits);
2725 accum_bits += HOST_CHAR_BIT;
2727 chunk_size = HOST_CHAR_BIT - targ_offset;
2730 mask = ((1 << chunk_size) - 1) << targ_offset;
2731 *target = (*target & ~mask) | ((accum << targ_offset) & mask);
2733 accum_bits -= chunk_size;
2734 accum >>= chunk_size;
2741 /* Store the contents of FROMVAL into the location of TOVAL.
2742 Return a new value with the location of TOVAL and contents of
2743 FROMVAL. Handles assignment into packed fields that have
2744 floating-point or non-scalar types. */
2746 static struct value *
2747 ada_value_assign (struct value *toval, struct value *fromval)
2749 struct type *type = value_type (toval);
2750 int bits = value_bitsize (toval);
2752 toval = ada_coerce_ref (toval);
2753 fromval = ada_coerce_ref (fromval);
2755 if (ada_is_direct_array_type (value_type (toval)))
2756 toval = ada_coerce_to_simple_array (toval);
2757 if (ada_is_direct_array_type (value_type (fromval)))
2758 fromval = ada_coerce_to_simple_array (fromval);
2760 if (!deprecated_value_modifiable (toval))
2761 error (_("Left operand of assignment is not a modifiable lvalue."));
2763 if (VALUE_LVAL (toval) == lval_memory
2765 && (TYPE_CODE (type) == TYPE_CODE_FLT
2766 || TYPE_CODE (type) == TYPE_CODE_STRUCT))
2768 int len = (value_bitpos (toval)
2769 + bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT;
2771 gdb_byte *buffer = (gdb_byte *) alloca (len);
2773 CORE_ADDR to_addr = value_address (toval);
2775 if (TYPE_CODE (type) == TYPE_CODE_FLT)
2776 fromval = value_cast (type, fromval);
2778 read_memory (to_addr, buffer, len);
2779 from_size = value_bitsize (fromval);
2781 from_size = TYPE_LENGTH (value_type (fromval)) * TARGET_CHAR_BIT;
2782 if (gdbarch_bits_big_endian (get_type_arch (type)))
2783 move_bits (buffer, value_bitpos (toval),
2784 value_contents (fromval), from_size - bits, bits, 1);
2786 move_bits (buffer, value_bitpos (toval),
2787 value_contents (fromval), 0, bits, 0);
2788 write_memory_with_notification (to_addr, buffer, len);
2790 val = value_copy (toval);
2791 memcpy (value_contents_raw (val), value_contents (fromval),
2792 TYPE_LENGTH (type));
2793 deprecated_set_value_type (val, type);
2798 return value_assign (toval, fromval);
2802 /* Given that COMPONENT is a memory lvalue that is part of the lvalue
2803 CONTAINER, assign the contents of VAL to COMPONENTS's place in
2804 CONTAINER. Modifies the VALUE_CONTENTS of CONTAINER only, not
2805 COMPONENT, and not the inferior's memory. The current contents
2806 of COMPONENT are ignored.
2808 Although not part of the initial design, this function also works
2809 when CONTAINER and COMPONENT are not_lval's: it works as if CONTAINER
2810 had a null address, and COMPONENT had an address which is equal to
2811 its offset inside CONTAINER. */
2814 value_assign_to_component (struct value *container, struct value *component,
2817 LONGEST offset_in_container =
2818 (LONGEST) (value_address (component) - value_address (container));
2819 int bit_offset_in_container =
2820 value_bitpos (component) - value_bitpos (container);
2823 val = value_cast (value_type (component), val);
2825 if (value_bitsize (component) == 0)
2826 bits = TARGET_CHAR_BIT * TYPE_LENGTH (value_type (component));
2828 bits = value_bitsize (component);
2830 if (gdbarch_bits_big_endian (get_type_arch (value_type (container))))
2831 move_bits (value_contents_writeable (container) + offset_in_container,
2832 value_bitpos (container) + bit_offset_in_container,
2833 value_contents (val),
2834 TYPE_LENGTH (value_type (component)) * TARGET_CHAR_BIT - bits,
2837 move_bits (value_contents_writeable (container) + offset_in_container,
2838 value_bitpos (container) + bit_offset_in_container,
2839 value_contents (val), 0, bits, 0);
2842 /* The value of the element of array ARR at the ARITY indices given in IND.
2843 ARR may be either a simple array, GNAT array descriptor, or pointer
2847 ada_value_subscript (struct value *arr, int arity, struct value **ind)
2851 struct type *elt_type;
2853 elt = ada_coerce_to_simple_array (arr);
2855 elt_type = ada_check_typedef (value_type (elt));
2856 if (TYPE_CODE (elt_type) == TYPE_CODE_ARRAY
2857 && TYPE_FIELD_BITSIZE (elt_type, 0) > 0)
2858 return value_subscript_packed (elt, arity, ind);
2860 for (k = 0; k < arity; k += 1)
2862 if (TYPE_CODE (elt_type) != TYPE_CODE_ARRAY)
2863 error (_("too many subscripts (%d expected)"), k);
2864 elt = value_subscript (elt, pos_atr (ind[k]));
2869 /* Assuming ARR is a pointer to a GDB array, the value of the element
2870 of *ARR at the ARITY indices given in IND.
2871 Does not read the entire array into memory.
2873 Note: Unlike what one would expect, this function is used instead of
2874 ada_value_subscript for basically all non-packed array types. The reason
2875 for this is that a side effect of doing our own pointer arithmetics instead
2876 of relying on value_subscript is that there is no implicit typedef peeling.
2877 This is important for arrays of array accesses, where it allows us to
2878 preserve the fact that the array's element is an array access, where the
2879 access part os encoded in a typedef layer. */
2881 static struct value *
2882 ada_value_ptr_subscript (struct value *arr, int arity, struct value **ind)
2885 struct value *array_ind = ada_value_ind (arr);
2887 = check_typedef (value_enclosing_type (array_ind));
2889 if (TYPE_CODE (type) == TYPE_CODE_ARRAY
2890 && TYPE_FIELD_BITSIZE (type, 0) > 0)
2891 return value_subscript_packed (array_ind, arity, ind);
2893 for (k = 0; k < arity; k += 1)
2896 struct value *lwb_value;
2898 if (TYPE_CODE (type) != TYPE_CODE_ARRAY)
2899 error (_("too many subscripts (%d expected)"), k);
2900 arr = value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2902 get_discrete_bounds (TYPE_INDEX_TYPE (type), &lwb, &upb);
2903 lwb_value = value_from_longest (value_type(ind[k]), lwb);
2904 arr = value_ptradd (arr, pos_atr (ind[k]) - pos_atr (lwb_value));
2905 type = TYPE_TARGET_TYPE (type);
2908 return value_ind (arr);
2911 /* Given that ARRAY_PTR is a pointer or reference to an array of type TYPE (the
2912 actual type of ARRAY_PTR is ignored), returns the Ada slice of
2913 HIGH'Pos-LOW'Pos+1 elements starting at index LOW. The lower bound of
2914 this array is LOW, as per Ada rules. */
2915 static struct value *
2916 ada_value_slice_from_ptr (struct value *array_ptr, struct type *type,
2919 struct type *type0 = ada_check_typedef (type);
2920 struct type *base_index_type = TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (type0));
2921 struct type *index_type
2922 = create_static_range_type (NULL, base_index_type, low, high);
2923 struct type *slice_type =
2924 create_array_type (NULL, TYPE_TARGET_TYPE (type0), index_type);
2925 int base_low = ada_discrete_type_low_bound (TYPE_INDEX_TYPE (type0));
2926 LONGEST base_low_pos, low_pos;
2929 if (!discrete_position (base_index_type, low, &low_pos)
2930 || !discrete_position (base_index_type, base_low, &base_low_pos))
2932 warning (_("unable to get positions in slice, use bounds instead"));
2934 base_low_pos = base_low;
2937 base = value_as_address (array_ptr)
2938 + ((low_pos - base_low_pos)
2939 * TYPE_LENGTH (TYPE_TARGET_TYPE (type0)));
2940 return value_at_lazy (slice_type, base);
2944 static struct value *
2945 ada_value_slice (struct value *array, int low, int high)
2947 struct type *type = ada_check_typedef (value_type (array));
2948 struct type *base_index_type = TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (type));
2949 struct type *index_type
2950 = create_static_range_type (NULL, TYPE_INDEX_TYPE (type), low, high);
2951 struct type *slice_type =
2952 create_array_type (NULL, TYPE_TARGET_TYPE (type), index_type);
2953 LONGEST low_pos, high_pos;
2955 if (!discrete_position (base_index_type, low, &low_pos)
2956 || !discrete_position (base_index_type, high, &high_pos))
2958 warning (_("unable to get positions in slice, use bounds instead"));
2963 return value_cast (slice_type,
2964 value_slice (array, low, high_pos - low_pos + 1));
2967 /* If type is a record type in the form of a standard GNAT array
2968 descriptor, returns the number of dimensions for type. If arr is a
2969 simple array, returns the number of "array of"s that prefix its
2970 type designation. Otherwise, returns 0. */
2973 ada_array_arity (struct type *type)
2980 type = desc_base_type (type);
2983 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
2984 return desc_arity (desc_bounds_type (type));
2986 while (TYPE_CODE (type) == TYPE_CODE_ARRAY)
2989 type = ada_check_typedef (TYPE_TARGET_TYPE (type));
2995 /* If TYPE is a record type in the form of a standard GNAT array
2996 descriptor or a simple array type, returns the element type for
2997 TYPE after indexing by NINDICES indices, or by all indices if
2998 NINDICES is -1. Otherwise, returns NULL. */
3001 ada_array_element_type (struct type *type, int nindices)
3003 type = desc_base_type (type);
3005 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
3008 struct type *p_array_type;
3010 p_array_type = desc_data_target_type (type);
3012 k = ada_array_arity (type);
3016 /* Initially p_array_type = elt_type(*)[]...(k times)...[]. */
3017 if (nindices >= 0 && k > nindices)
3019 while (k > 0 && p_array_type != NULL)
3021 p_array_type = ada_check_typedef (TYPE_TARGET_TYPE (p_array_type));
3024 return p_array_type;
3026 else if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
3028 while (nindices != 0 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
3030 type = TYPE_TARGET_TYPE (type);
3039 /* The type of nth index in arrays of given type (n numbering from 1).
3040 Does not examine memory. Throws an error if N is invalid or TYPE
3041 is not an array type. NAME is the name of the Ada attribute being
3042 evaluated ('range, 'first, 'last, or 'length); it is used in building
3043 the error message. */
3045 static struct type *
3046 ada_index_type (struct type *type, int n, const char *name)
3048 struct type *result_type;
3050 type = desc_base_type (type);
3052 if (n < 0 || n > ada_array_arity (type))
3053 error (_("invalid dimension number to '%s"), name);
3055 if (ada_is_simple_array_type (type))
3059 for (i = 1; i < n; i += 1)
3060 type = TYPE_TARGET_TYPE (type);
3061 result_type = TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (type));
3062 /* FIXME: The stabs type r(0,0);bound;bound in an array type
3063 has a target type of TYPE_CODE_UNDEF. We compensate here, but
3064 perhaps stabsread.c would make more sense. */
3065 if (result_type && TYPE_CODE (result_type) == TYPE_CODE_UNDEF)
3070 result_type = desc_index_type (desc_bounds_type (type), n);
3071 if (result_type == NULL)
3072 error (_("attempt to take bound of something that is not an array"));
3078 /* Given that arr is an array type, returns the lower bound of the
3079 Nth index (numbering from 1) if WHICH is 0, and the upper bound if
3080 WHICH is 1. This returns bounds 0 .. -1 if ARR_TYPE is an
3081 array-descriptor type. It works for other arrays with bounds supplied
3082 by run-time quantities other than discriminants. */
3085 ada_array_bound_from_type (struct type *arr_type, int n, int which)
3087 struct type *type, *index_type_desc, *index_type;
3090 gdb_assert (which == 0 || which == 1);
3092 if (ada_is_constrained_packed_array_type (arr_type))
3093 arr_type = decode_constrained_packed_array_type (arr_type);
3095 if (arr_type == NULL || !ada_is_simple_array_type (arr_type))
3096 return (LONGEST) - which;
3098 if (TYPE_CODE (arr_type) == TYPE_CODE_PTR)
3099 type = TYPE_TARGET_TYPE (arr_type);
3103 if (TYPE_FIXED_INSTANCE (type))
3105 /* The array has already been fixed, so we do not need to
3106 check the parallel ___XA type again. That encoding has
3107 already been applied, so ignore it now. */
3108 index_type_desc = NULL;
3112 index_type_desc = ada_find_parallel_type (type, "___XA");
3113 ada_fixup_array_indexes_type (index_type_desc);
3116 if (index_type_desc != NULL)
3117 index_type = to_fixed_range_type (TYPE_FIELD_TYPE (index_type_desc, n - 1),
3121 struct type *elt_type = check_typedef (type);
3123 for (i = 1; i < n; i++)
3124 elt_type = check_typedef (TYPE_TARGET_TYPE (elt_type));
3126 index_type = TYPE_INDEX_TYPE (elt_type);
3130 (LONGEST) (which == 0
3131 ? ada_discrete_type_low_bound (index_type)
3132 : ada_discrete_type_high_bound (index_type));
3135 /* Given that arr is an array value, returns the lower bound of the
3136 nth index (numbering from 1) if WHICH is 0, and the upper bound if
3137 WHICH is 1. This routine will also work for arrays with bounds
3138 supplied by run-time quantities other than discriminants. */
3141 ada_array_bound (struct value *arr, int n, int which)
3143 struct type *arr_type;
3145 if (TYPE_CODE (check_typedef (value_type (arr))) == TYPE_CODE_PTR)
3146 arr = value_ind (arr);
3147 arr_type = value_enclosing_type (arr);
3149 if (ada_is_constrained_packed_array_type (arr_type))
3150 return ada_array_bound (decode_constrained_packed_array (arr), n, which);
3151 else if (ada_is_simple_array_type (arr_type))
3152 return ada_array_bound_from_type (arr_type, n, which);
3154 return value_as_long (desc_one_bound (desc_bounds (arr), n, which));
3157 /* Given that arr is an array value, returns the length of the
3158 nth index. This routine will also work for arrays with bounds
3159 supplied by run-time quantities other than discriminants.
3160 Does not work for arrays indexed by enumeration types with representation
3161 clauses at the moment. */
3164 ada_array_length (struct value *arr, int n)
3166 struct type *arr_type, *index_type;
3169 if (TYPE_CODE (check_typedef (value_type (arr))) == TYPE_CODE_PTR)
3170 arr = value_ind (arr);
3171 arr_type = value_enclosing_type (arr);
3173 if (ada_is_constrained_packed_array_type (arr_type))
3174 return ada_array_length (decode_constrained_packed_array (arr), n);
3176 if (ada_is_simple_array_type (arr_type))
3178 low = ada_array_bound_from_type (arr_type, n, 0);
3179 high = ada_array_bound_from_type (arr_type, n, 1);
3183 low = value_as_long (desc_one_bound (desc_bounds (arr), n, 0));
3184 high = value_as_long (desc_one_bound (desc_bounds (arr), n, 1));
3187 arr_type = check_typedef (arr_type);
3188 index_type = TYPE_INDEX_TYPE (arr_type);
3189 if (index_type != NULL)
3191 struct type *base_type;
3192 if (TYPE_CODE (index_type) == TYPE_CODE_RANGE)
3193 base_type = TYPE_TARGET_TYPE (index_type);
3195 base_type = index_type;
3197 low = pos_atr (value_from_longest (base_type, low));
3198 high = pos_atr (value_from_longest (base_type, high));
3200 return high - low + 1;
3203 /* An empty array whose type is that of ARR_TYPE (an array type),
3204 with bounds LOW to LOW-1. */
3206 static struct value *
3207 empty_array (struct type *arr_type, int low)
3209 struct type *arr_type0 = ada_check_typedef (arr_type);
3210 struct type *index_type
3211 = create_static_range_type
3212 (NULL, TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (arr_type0)), low, low - 1);
3213 struct type *elt_type = ada_array_element_type (arr_type0, 1);
3215 return allocate_value (create_array_type (NULL, elt_type, index_type));
3219 /* Name resolution */
3221 /* The "decoded" name for the user-definable Ada operator corresponding
3225 ada_decoded_op_name (enum exp_opcode op)
3229 for (i = 0; ada_opname_table[i].encoded != NULL; i += 1)
3231 if (ada_opname_table[i].op == op)
3232 return ada_opname_table[i].decoded;
3234 error (_("Could not find operator name for opcode"));
3238 /* Same as evaluate_type (*EXP), but resolves ambiguous symbol
3239 references (marked by OP_VAR_VALUE nodes in which the symbol has an
3240 undefined namespace) and converts operators that are
3241 user-defined into appropriate function calls. If CONTEXT_TYPE is
3242 non-null, it provides a preferred result type [at the moment, only
3243 type void has any effect---causing procedures to be preferred over
3244 functions in calls]. A null CONTEXT_TYPE indicates that a non-void
3245 return type is preferred. May change (expand) *EXP. */
3248 resolve (struct expression **expp, int void_context_p)
3250 struct type *context_type = NULL;
3254 context_type = builtin_type ((*expp)->gdbarch)->builtin_void;
3256 resolve_subexp (expp, &pc, 1, context_type);
3259 /* Resolve the operator of the subexpression beginning at
3260 position *POS of *EXPP. "Resolving" consists of replacing
3261 the symbols that have undefined namespaces in OP_VAR_VALUE nodes
3262 with their resolutions, replacing built-in operators with
3263 function calls to user-defined operators, where appropriate, and,
3264 when DEPROCEDURE_P is non-zero, converting function-valued variables
3265 into parameterless calls. May expand *EXPP. The CONTEXT_TYPE functions
3266 are as in ada_resolve, above. */
3268 static struct value *
3269 resolve_subexp (struct expression **expp, int *pos, int deprocedure_p,
3270 struct type *context_type)
3274 struct expression *exp; /* Convenience: == *expp. */
3275 enum exp_opcode op = (*expp)->elts[pc].opcode;
3276 struct value **argvec; /* Vector of operand types (alloca'ed). */
3277 int nargs; /* Number of operands. */
3284 /* Pass one: resolve operands, saving their types and updating *pos,
3289 if (exp->elts[pc + 3].opcode == OP_VAR_VALUE
3290 && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN)
3295 resolve_subexp (expp, pos, 0, NULL);
3297 nargs = longest_to_int (exp->elts[pc + 1].longconst);
3302 resolve_subexp (expp, pos, 0, NULL);
3307 resolve_subexp (expp, pos, 1, check_typedef (exp->elts[pc + 1].type));
3310 case OP_ATR_MODULUS:
3320 case TERNOP_IN_RANGE:
3321 case BINOP_IN_BOUNDS:
3327 case OP_DISCRETE_RANGE:
3329 ada_forward_operator_length (exp, pc, &oplen, &nargs);
3338 arg1 = resolve_subexp (expp, pos, 0, NULL);
3340 resolve_subexp (expp, pos, 1, NULL);
3342 resolve_subexp (expp, pos, 1, value_type (arg1));
3359 case BINOP_LOGICAL_AND:
3360 case BINOP_LOGICAL_OR:
3361 case BINOP_BITWISE_AND:
3362 case BINOP_BITWISE_IOR:
3363 case BINOP_BITWISE_XOR:
3366 case BINOP_NOTEQUAL:
3373 case BINOP_SUBSCRIPT:
3381 case UNOP_LOGICAL_NOT:
3397 case OP_INTERNALVAR:
3407 *pos += 4 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
3410 case STRUCTOP_STRUCT:
3411 *pos += 4 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
3424 error (_("Unexpected operator during name resolution"));
3427 argvec = XALLOCAVEC (struct value *, nargs + 1);
3428 for (i = 0; i < nargs; i += 1)
3429 argvec[i] = resolve_subexp (expp, pos, 1, NULL);
3433 /* Pass two: perform any resolution on principal operator. */
3440 if (SYMBOL_DOMAIN (exp->elts[pc + 2].symbol) == UNDEF_DOMAIN)
3442 struct block_symbol *candidates;
3446 ada_lookup_symbol_list (SYMBOL_LINKAGE_NAME
3447 (exp->elts[pc + 2].symbol),
3448 exp->elts[pc + 1].block, VAR_DOMAIN,
3451 if (n_candidates > 1)
3453 /* Types tend to get re-introduced locally, so if there
3454 are any local symbols that are not types, first filter
3457 for (j = 0; j < n_candidates; j += 1)
3458 switch (SYMBOL_CLASS (candidates[j].symbol))
3463 case LOC_REGPARM_ADDR:
3471 if (j < n_candidates)
3474 while (j < n_candidates)
3476 if (SYMBOL_CLASS (candidates[j].symbol) == LOC_TYPEDEF)
3478 candidates[j] = candidates[n_candidates - 1];
3487 if (n_candidates == 0)
3488 error (_("No definition found for %s"),
3489 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
3490 else if (n_candidates == 1)
3492 else if (deprocedure_p
3493 && !is_nonfunction (candidates, n_candidates))
3495 i = ada_resolve_function
3496 (candidates, n_candidates, NULL, 0,
3497 SYMBOL_LINKAGE_NAME (exp->elts[pc + 2].symbol),
3500 error (_("Could not find a match for %s"),
3501 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
3505 printf_filtered (_("Multiple matches for %s\n"),
3506 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
3507 user_select_syms (candidates, n_candidates, 1);
3511 exp->elts[pc + 1].block = candidates[i].block;
3512 exp->elts[pc + 2].symbol = candidates[i].symbol;
3513 if (innermost_block == NULL
3514 || contained_in (candidates[i].block, innermost_block))
3515 innermost_block = candidates[i].block;
3519 && (TYPE_CODE (SYMBOL_TYPE (exp->elts[pc + 2].symbol))
3522 replace_operator_with_call (expp, pc, 0, 0,
3523 exp->elts[pc + 2].symbol,
3524 exp->elts[pc + 1].block);
3531 if (exp->elts[pc + 3].opcode == OP_VAR_VALUE
3532 && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN)
3534 struct block_symbol *candidates;
3538 ada_lookup_symbol_list (SYMBOL_LINKAGE_NAME
3539 (exp->elts[pc + 5].symbol),
3540 exp->elts[pc + 4].block, VAR_DOMAIN,
3542 if (n_candidates == 1)
3546 i = ada_resolve_function
3547 (candidates, n_candidates,
3549 SYMBOL_LINKAGE_NAME (exp->elts[pc + 5].symbol),
3552 error (_("Could not find a match for %s"),
3553 SYMBOL_PRINT_NAME (exp->elts[pc + 5].symbol));
3556 exp->elts[pc + 4].block = candidates[i].block;
3557 exp->elts[pc + 5].symbol = candidates[i].symbol;
3558 if (innermost_block == NULL
3559 || contained_in (candidates[i].block, innermost_block))
3560 innermost_block = candidates[i].block;
3571 case BINOP_BITWISE_AND:
3572 case BINOP_BITWISE_IOR:
3573 case BINOP_BITWISE_XOR:
3575 case BINOP_NOTEQUAL:
3583 case UNOP_LOGICAL_NOT:
3585 if (possible_user_operator_p (op, argvec))
3587 struct block_symbol *candidates;
3591 ada_lookup_symbol_list (ada_encode (ada_decoded_op_name (op)),
3592 (struct block *) NULL, VAR_DOMAIN,
3594 i = ada_resolve_function (candidates, n_candidates, argvec, nargs,
3595 ada_decoded_op_name (op), NULL);
3599 replace_operator_with_call (expp, pc, nargs, 1,
3600 candidates[i].symbol,
3601 candidates[i].block);
3612 return evaluate_subexp_type (exp, pos);
3615 /* Return non-zero if formal type FTYPE matches actual type ATYPE. If
3616 MAY_DEREF is non-zero, the formal may be a pointer and the actual
3618 /* The term "match" here is rather loose. The match is heuristic and
3622 ada_type_match (struct type *ftype, struct type *atype, int may_deref)
3624 ftype = ada_check_typedef (ftype);
3625 atype = ada_check_typedef (atype);
3627 if (TYPE_CODE (ftype) == TYPE_CODE_REF)
3628 ftype = TYPE_TARGET_TYPE (ftype);
3629 if (TYPE_CODE (atype) == TYPE_CODE_REF)
3630 atype = TYPE_TARGET_TYPE (atype);
3632 switch (TYPE_CODE (ftype))
3635 return TYPE_CODE (ftype) == TYPE_CODE (atype);
3637 if (TYPE_CODE (atype) == TYPE_CODE_PTR)
3638 return ada_type_match (TYPE_TARGET_TYPE (ftype),
3639 TYPE_TARGET_TYPE (atype), 0);
3642 && ada_type_match (TYPE_TARGET_TYPE (ftype), atype, 0));
3644 case TYPE_CODE_ENUM:
3645 case TYPE_CODE_RANGE:
3646 switch (TYPE_CODE (atype))
3649 case TYPE_CODE_ENUM:
3650 case TYPE_CODE_RANGE:
3656 case TYPE_CODE_ARRAY:
3657 return (TYPE_CODE (atype) == TYPE_CODE_ARRAY
3658 || ada_is_array_descriptor_type (atype));
3660 case TYPE_CODE_STRUCT:
3661 if (ada_is_array_descriptor_type (ftype))
3662 return (TYPE_CODE (atype) == TYPE_CODE_ARRAY
3663 || ada_is_array_descriptor_type (atype));
3665 return (TYPE_CODE (atype) == TYPE_CODE_STRUCT
3666 && !ada_is_array_descriptor_type (atype));
3668 case TYPE_CODE_UNION:
3670 return (TYPE_CODE (atype) == TYPE_CODE (ftype));
3674 /* Return non-zero if the formals of FUNC "sufficiently match" the
3675 vector of actual argument types ACTUALS of size N_ACTUALS. FUNC
3676 may also be an enumeral, in which case it is treated as a 0-
3677 argument function. */
3680 ada_args_match (struct symbol *func, struct value **actuals, int n_actuals)
3683 struct type *func_type = SYMBOL_TYPE (func);
3685 if (SYMBOL_CLASS (func) == LOC_CONST
3686 && TYPE_CODE (func_type) == TYPE_CODE_ENUM)
3687 return (n_actuals == 0);
3688 else if (func_type == NULL || TYPE_CODE (func_type) != TYPE_CODE_FUNC)
3691 if (TYPE_NFIELDS (func_type) != n_actuals)
3694 for (i = 0; i < n_actuals; i += 1)
3696 if (actuals[i] == NULL)
3700 struct type *ftype = ada_check_typedef (TYPE_FIELD_TYPE (func_type,
3702 struct type *atype = ada_check_typedef (value_type (actuals[i]));
3704 if (!ada_type_match (ftype, atype, 1))
3711 /* False iff function type FUNC_TYPE definitely does not produce a value
3712 compatible with type CONTEXT_TYPE. Conservatively returns 1 if
3713 FUNC_TYPE is not a valid function type with a non-null return type
3714 or an enumerated type. A null CONTEXT_TYPE indicates any non-void type. */
3717 return_match (struct type *func_type, struct type *context_type)
3719 struct type *return_type;
3721 if (func_type == NULL)
3724 if (TYPE_CODE (func_type) == TYPE_CODE_FUNC)
3725 return_type = get_base_type (TYPE_TARGET_TYPE (func_type));
3727 return_type = get_base_type (func_type);
3728 if (return_type == NULL)
3731 context_type = get_base_type (context_type);
3733 if (TYPE_CODE (return_type) == TYPE_CODE_ENUM)
3734 return context_type == NULL || return_type == context_type;
3735 else if (context_type == NULL)
3736 return TYPE_CODE (return_type) != TYPE_CODE_VOID;
3738 return TYPE_CODE (return_type) == TYPE_CODE (context_type);
3742 /* Returns the index in SYMS[0..NSYMS-1] that contains the symbol for the
3743 function (if any) that matches the types of the NARGS arguments in
3744 ARGS. If CONTEXT_TYPE is non-null and there is at least one match
3745 that returns that type, then eliminate matches that don't. If
3746 CONTEXT_TYPE is void and there is at least one match that does not
3747 return void, eliminate all matches that do.
3749 Asks the user if there is more than one match remaining. Returns -1
3750 if there is no such symbol or none is selected. NAME is used
3751 solely for messages. May re-arrange and modify SYMS in
3752 the process; the index returned is for the modified vector. */
3755 ada_resolve_function (struct block_symbol syms[],
3756 int nsyms, struct value **args, int nargs,
3757 const char *name, struct type *context_type)
3761 int m; /* Number of hits */
3764 /* In the first pass of the loop, we only accept functions matching
3765 context_type. If none are found, we add a second pass of the loop
3766 where every function is accepted. */
3767 for (fallback = 0; m == 0 && fallback < 2; fallback++)
3769 for (k = 0; k < nsyms; k += 1)
3771 struct type *type = ada_check_typedef (SYMBOL_TYPE (syms[k].symbol));
3773 if (ada_args_match (syms[k].symbol, args, nargs)
3774 && (fallback || return_match (type, context_type)))
3782 /* If we got multiple matches, ask the user which one to use. Don't do this
3783 interactive thing during completion, though, as the purpose of the
3784 completion is providing a list of all possible matches. Prompting the
3785 user to filter it down would be completely unexpected in this case. */
3788 else if (m > 1 && !parse_completion)
3790 printf_filtered (_("Multiple matches for %s\n"), name);
3791 user_select_syms (syms, m, 1);
3797 /* Returns true (non-zero) iff decoded name N0 should appear before N1
3798 in a listing of choices during disambiguation (see sort_choices, below).
3799 The idea is that overloadings of a subprogram name from the
3800 same package should sort in their source order. We settle for ordering
3801 such symbols by their trailing number (__N or $N). */
3804 encoded_ordered_before (const char *N0, const char *N1)
3808 else if (N0 == NULL)
3814 for (k0 = strlen (N0) - 1; k0 > 0 && isdigit (N0[k0]); k0 -= 1)
3816 for (k1 = strlen (N1) - 1; k1 > 0 && isdigit (N1[k1]); k1 -= 1)
3818 if ((N0[k0] == '_' || N0[k0] == '$') && N0[k0 + 1] != '\000'
3819 && (N1[k1] == '_' || N1[k1] == '$') && N1[k1 + 1] != '\000')
3824 while (N0[n0] == '_' && n0 > 0 && N0[n0 - 1] == '_')
3827 while (N1[n1] == '_' && n1 > 0 && N1[n1 - 1] == '_')
3829 if (n0 == n1 && strncmp (N0, N1, n0) == 0)
3830 return (atoi (N0 + k0 + 1) < atoi (N1 + k1 + 1));
3832 return (strcmp (N0, N1) < 0);
3836 /* Sort SYMS[0..NSYMS-1] to put the choices in a canonical order by the
3840 sort_choices (struct block_symbol syms[], int nsyms)
3844 for (i = 1; i < nsyms; i += 1)
3846 struct block_symbol sym = syms[i];
3849 for (j = i - 1; j >= 0; j -= 1)
3851 if (encoded_ordered_before (SYMBOL_LINKAGE_NAME (syms[j].symbol),
3852 SYMBOL_LINKAGE_NAME (sym.symbol)))
3854 syms[j + 1] = syms[j];
3860 /* Whether GDB should display formals and return types for functions in the
3861 overloads selection menu. */
3862 static int print_signatures = 1;
3864 /* Print the signature for SYM on STREAM according to the FLAGS options. For
3865 all but functions, the signature is just the name of the symbol. For
3866 functions, this is the name of the function, the list of types for formals
3867 and the return type (if any). */
3870 ada_print_symbol_signature (struct ui_file *stream, struct symbol *sym,
3871 const struct type_print_options *flags)
3873 struct type *type = SYMBOL_TYPE (sym);
3875 fprintf_filtered (stream, "%s", SYMBOL_PRINT_NAME (sym));
3876 if (!print_signatures
3878 || TYPE_CODE (type) != TYPE_CODE_FUNC)
3881 if (TYPE_NFIELDS (type) > 0)
3885 fprintf_filtered (stream, " (");
3886 for (i = 0; i < TYPE_NFIELDS (type); ++i)
3889 fprintf_filtered (stream, "; ");
3890 ada_print_type (TYPE_FIELD_TYPE (type, i), NULL, stream, -1, 0,
3893 fprintf_filtered (stream, ")");
3895 if (TYPE_TARGET_TYPE (type) != NULL
3896 && TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_VOID)
3898 fprintf_filtered (stream, " return ");
3899 ada_print_type (TYPE_TARGET_TYPE (type), NULL, stream, -1, 0, flags);
3903 /* Given a list of NSYMS symbols in SYMS, select up to MAX_RESULTS>0
3904 by asking the user (if necessary), returning the number selected,
3905 and setting the first elements of SYMS items. Error if no symbols
3908 /* NOTE: Adapted from decode_line_2 in symtab.c, with which it ought
3909 to be re-integrated one of these days. */
3912 user_select_syms (struct block_symbol *syms, int nsyms, int max_results)
3915 int *chosen = XALLOCAVEC (int , nsyms);
3917 int first_choice = (max_results == 1) ? 1 : 2;
3918 const char *select_mode = multiple_symbols_select_mode ();
3920 if (max_results < 1)
3921 error (_("Request to select 0 symbols!"));
3925 if (select_mode == multiple_symbols_cancel)
3927 canceled because the command is ambiguous\n\
3928 See set/show multiple-symbol."));
3930 /* If select_mode is "all", then return all possible symbols.
3931 Only do that if more than one symbol can be selected, of course.
3932 Otherwise, display the menu as usual. */
3933 if (select_mode == multiple_symbols_all && max_results > 1)
3936 printf_unfiltered (_("[0] cancel\n"));
3937 if (max_results > 1)
3938 printf_unfiltered (_("[1] all\n"));
3940 sort_choices (syms, nsyms);
3942 for (i = 0; i < nsyms; i += 1)
3944 if (syms[i].symbol == NULL)
3947 if (SYMBOL_CLASS (syms[i].symbol) == LOC_BLOCK)
3949 struct symtab_and_line sal =
3950 find_function_start_sal (syms[i].symbol, 1);
3952 printf_unfiltered ("[%d] ", i + first_choice);
3953 ada_print_symbol_signature (gdb_stdout, syms[i].symbol,
3954 &type_print_raw_options);
3955 if (sal.symtab == NULL)
3956 printf_unfiltered (_(" at <no source file available>:%d\n"),
3959 printf_unfiltered (_(" at %s:%d\n"),
3960 symtab_to_filename_for_display (sal.symtab),
3967 (SYMBOL_CLASS (syms[i].symbol) == LOC_CONST
3968 && SYMBOL_TYPE (syms[i].symbol) != NULL
3969 && TYPE_CODE (SYMBOL_TYPE (syms[i].symbol)) == TYPE_CODE_ENUM);
3970 struct symtab *symtab = NULL;
3972 if (SYMBOL_OBJFILE_OWNED (syms[i].symbol))
3973 symtab = symbol_symtab (syms[i].symbol);
3975 if (SYMBOL_LINE (syms[i].symbol) != 0 && symtab != NULL)
3977 printf_unfiltered ("[%d] ", i + first_choice);
3978 ada_print_symbol_signature (gdb_stdout, syms[i].symbol,
3979 &type_print_raw_options);
3980 printf_unfiltered (_(" at %s:%d\n"),
3981 symtab_to_filename_for_display (symtab),
3982 SYMBOL_LINE (syms[i].symbol));
3984 else if (is_enumeral
3985 && TYPE_NAME (SYMBOL_TYPE (syms[i].symbol)) != NULL)
3987 printf_unfiltered (("[%d] "), i + first_choice);
3988 ada_print_type (SYMBOL_TYPE (syms[i].symbol), NULL,
3989 gdb_stdout, -1, 0, &type_print_raw_options);
3990 printf_unfiltered (_("'(%s) (enumeral)\n"),
3991 SYMBOL_PRINT_NAME (syms[i].symbol));
3995 printf_unfiltered ("[%d] ", i + first_choice);
3996 ada_print_symbol_signature (gdb_stdout, syms[i].symbol,
3997 &type_print_raw_options);
4000 printf_unfiltered (is_enumeral
4001 ? _(" in %s (enumeral)\n")
4003 symtab_to_filename_for_display (symtab));
4005 printf_unfiltered (is_enumeral
4006 ? _(" (enumeral)\n")
4012 n_chosen = get_selections (chosen, nsyms, max_results, max_results > 1,
4015 for (i = 0; i < n_chosen; i += 1)
4016 syms[i] = syms[chosen[i]];
4021 /* Read and validate a set of numeric choices from the user in the
4022 range 0 .. N_CHOICES-1. Place the results in increasing
4023 order in CHOICES[0 .. N-1], and return N.
4025 The user types choices as a sequence of numbers on one line
4026 separated by blanks, encoding them as follows:
4028 + A choice of 0 means to cancel the selection, throwing an error.
4029 + If IS_ALL_CHOICE, a choice of 1 selects the entire set 0 .. N_CHOICES-1.
4030 + The user chooses k by typing k+IS_ALL_CHOICE+1.
4032 The user is not allowed to choose more than MAX_RESULTS values.
4034 ANNOTATION_SUFFIX, if present, is used to annotate the input
4035 prompts (for use with the -f switch). */
4038 get_selections (int *choices, int n_choices, int max_results,
4039 int is_all_choice, char *annotation_suffix)
4044 int first_choice = is_all_choice ? 2 : 1;
4046 prompt = getenv ("PS2");
4050 args = command_line_input (prompt, 0, annotation_suffix);
4053 error_no_arg (_("one or more choice numbers"));
4057 /* Set choices[0 .. n_chosen-1] to the users' choices in ascending
4058 order, as given in args. Choices are validated. */
4064 args = skip_spaces (args);
4065 if (*args == '\0' && n_chosen == 0)
4066 error_no_arg (_("one or more choice numbers"));
4067 else if (*args == '\0')
4070 choice = strtol (args, &args2, 10);
4071 if (args == args2 || choice < 0
4072 || choice > n_choices + first_choice - 1)
4073 error (_("Argument must be choice number"));
4077 error (_("cancelled"));
4079 if (choice < first_choice)
4081 n_chosen = n_choices;
4082 for (j = 0; j < n_choices; j += 1)
4086 choice -= first_choice;
4088 for (j = n_chosen - 1; j >= 0 && choice < choices[j]; j -= 1)
4092 if (j < 0 || choice != choices[j])
4096 for (k = n_chosen - 1; k > j; k -= 1)
4097 choices[k + 1] = choices[k];
4098 choices[j + 1] = choice;
4103 if (n_chosen > max_results)
4104 error (_("Select no more than %d of the above"), max_results);
4109 /* Replace the operator of length OPLEN at position PC in *EXPP with a call
4110 on the function identified by SYM and BLOCK, and taking NARGS
4111 arguments. Update *EXPP as needed to hold more space. */
4114 replace_operator_with_call (struct expression **expp, int pc, int nargs,
4115 int oplen, struct symbol *sym,
4116 const struct block *block)
4118 /* A new expression, with 6 more elements (3 for funcall, 4 for function
4119 symbol, -oplen for operator being replaced). */
4120 struct expression *newexp = (struct expression *)
4121 xzalloc (sizeof (struct expression)
4122 + EXP_ELEM_TO_BYTES ((*expp)->nelts + 7 - oplen));
4123 struct expression *exp = *expp;
4125 newexp->nelts = exp->nelts + 7 - oplen;
4126 newexp->language_defn = exp->language_defn;
4127 newexp->gdbarch = exp->gdbarch;
4128 memcpy (newexp->elts, exp->elts, EXP_ELEM_TO_BYTES (pc));
4129 memcpy (newexp->elts + pc + 7, exp->elts + pc + oplen,
4130 EXP_ELEM_TO_BYTES (exp->nelts - pc - oplen));
4132 newexp->elts[pc].opcode = newexp->elts[pc + 2].opcode = OP_FUNCALL;
4133 newexp->elts[pc + 1].longconst = (LONGEST) nargs;
4135 newexp->elts[pc + 3].opcode = newexp->elts[pc + 6].opcode = OP_VAR_VALUE;
4136 newexp->elts[pc + 4].block = block;
4137 newexp->elts[pc + 5].symbol = sym;
4143 /* Type-class predicates */
4145 /* True iff TYPE is numeric (i.e., an INT, RANGE (of numeric type),
4149 numeric_type_p (struct type *type)
4155 switch (TYPE_CODE (type))
4160 case TYPE_CODE_RANGE:
4161 return (type == TYPE_TARGET_TYPE (type)
4162 || numeric_type_p (TYPE_TARGET_TYPE (type)));
4169 /* True iff TYPE is integral (an INT or RANGE of INTs). */
4172 integer_type_p (struct type *type)
4178 switch (TYPE_CODE (type))
4182 case TYPE_CODE_RANGE:
4183 return (type == TYPE_TARGET_TYPE (type)
4184 || integer_type_p (TYPE_TARGET_TYPE (type)));
4191 /* True iff TYPE is scalar (INT, RANGE, FLOAT, ENUM). */
4194 scalar_type_p (struct type *type)
4200 switch (TYPE_CODE (type))
4203 case TYPE_CODE_RANGE:
4204 case TYPE_CODE_ENUM:
4213 /* True iff TYPE is discrete (INT, RANGE, ENUM). */
4216 discrete_type_p (struct type *type)
4222 switch (TYPE_CODE (type))
4225 case TYPE_CODE_RANGE:
4226 case TYPE_CODE_ENUM:
4227 case TYPE_CODE_BOOL:
4235 /* Returns non-zero if OP with operands in the vector ARGS could be
4236 a user-defined function. Errs on the side of pre-defined operators
4237 (i.e., result 0). */
4240 possible_user_operator_p (enum exp_opcode op, struct value *args[])
4242 struct type *type0 =
4243 (args[0] == NULL) ? NULL : ada_check_typedef (value_type (args[0]));
4244 struct type *type1 =
4245 (args[1] == NULL) ? NULL : ada_check_typedef (value_type (args[1]));
4259 return (!(numeric_type_p (type0) && numeric_type_p (type1)));
4263 case BINOP_BITWISE_AND:
4264 case BINOP_BITWISE_IOR:
4265 case BINOP_BITWISE_XOR:
4266 return (!(integer_type_p (type0) && integer_type_p (type1)));
4269 case BINOP_NOTEQUAL:
4274 return (!(scalar_type_p (type0) && scalar_type_p (type1)));
4277 return !ada_is_array_type (type0) || !ada_is_array_type (type1);
4280 return (!(numeric_type_p (type0) && integer_type_p (type1)));
4284 case UNOP_LOGICAL_NOT:
4286 return (!numeric_type_p (type0));
4295 1. In the following, we assume that a renaming type's name may
4296 have an ___XD suffix. It would be nice if this went away at some
4298 2. We handle both the (old) purely type-based representation of
4299 renamings and the (new) variable-based encoding. At some point,
4300 it is devoutly to be hoped that the former goes away
4301 (FIXME: hilfinger-2007-07-09).
4302 3. Subprogram renamings are not implemented, although the XRS
4303 suffix is recognized (FIXME: hilfinger-2007-07-09). */
4305 /* If SYM encodes a renaming,
4307 <renaming> renames <renamed entity>,
4309 sets *LEN to the length of the renamed entity's name,
4310 *RENAMED_ENTITY to that name (not null-terminated), and *RENAMING_EXPR to
4311 the string describing the subcomponent selected from the renamed
4312 entity. Returns ADA_NOT_RENAMING if SYM does not encode a renaming
4313 (in which case, the values of *RENAMED_ENTITY, *LEN, and *RENAMING_EXPR
4314 are undefined). Otherwise, returns a value indicating the category
4315 of entity renamed: an object (ADA_OBJECT_RENAMING), exception
4316 (ADA_EXCEPTION_RENAMING), package (ADA_PACKAGE_RENAMING), or
4317 subprogram (ADA_SUBPROGRAM_RENAMING). Does no allocation; the
4318 strings returned in *RENAMED_ENTITY and *RENAMING_EXPR should not be
4319 deallocated. The values of RENAMED_ENTITY, LEN, or RENAMING_EXPR
4320 may be NULL, in which case they are not assigned.
4322 [Currently, however, GCC does not generate subprogram renamings.] */
4324 enum ada_renaming_category
4325 ada_parse_renaming (struct symbol *sym,
4326 const char **renamed_entity, int *len,
4327 const char **renaming_expr)
4329 enum ada_renaming_category kind;
4334 return ADA_NOT_RENAMING;
4335 switch (SYMBOL_CLASS (sym))
4338 return ADA_NOT_RENAMING;
4340 return parse_old_style_renaming (SYMBOL_TYPE (sym),
4341 renamed_entity, len, renaming_expr);
4345 case LOC_OPTIMIZED_OUT:
4346 info = strstr (SYMBOL_LINKAGE_NAME (sym), "___XR");
4348 return ADA_NOT_RENAMING;
4352 kind = ADA_OBJECT_RENAMING;
4356 kind = ADA_EXCEPTION_RENAMING;
4360 kind = ADA_PACKAGE_RENAMING;
4364 kind = ADA_SUBPROGRAM_RENAMING;
4368 return ADA_NOT_RENAMING;
4372 if (renamed_entity != NULL)
4373 *renamed_entity = info;
4374 suffix = strstr (info, "___XE");
4375 if (suffix == NULL || suffix == info)
4376 return ADA_NOT_RENAMING;
4378 *len = strlen (info) - strlen (suffix);
4380 if (renaming_expr != NULL)
4381 *renaming_expr = suffix;
4385 /* Assuming TYPE encodes a renaming according to the old encoding in
4386 exp_dbug.ads, returns details of that renaming in *RENAMED_ENTITY,
4387 *LEN, and *RENAMING_EXPR, as for ada_parse_renaming, above. Returns
4388 ADA_NOT_RENAMING otherwise. */
4389 static enum ada_renaming_category
4390 parse_old_style_renaming (struct type *type,
4391 const char **renamed_entity, int *len,
4392 const char **renaming_expr)
4394 enum ada_renaming_category kind;
4399 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_ENUM
4400 || TYPE_NFIELDS (type) != 1)
4401 return ADA_NOT_RENAMING;
4403 name = type_name_no_tag (type);
4405 return ADA_NOT_RENAMING;
4407 name = strstr (name, "___XR");
4409 return ADA_NOT_RENAMING;
4414 kind = ADA_OBJECT_RENAMING;
4417 kind = ADA_EXCEPTION_RENAMING;
4420 kind = ADA_PACKAGE_RENAMING;
4423 kind = ADA_SUBPROGRAM_RENAMING;
4426 return ADA_NOT_RENAMING;
4429 info = TYPE_FIELD_NAME (type, 0);
4431 return ADA_NOT_RENAMING;
4432 if (renamed_entity != NULL)
4433 *renamed_entity = info;
4434 suffix = strstr (info, "___XE");
4435 if (renaming_expr != NULL)
4436 *renaming_expr = suffix + 5;
4437 if (suffix == NULL || suffix == info)
4438 return ADA_NOT_RENAMING;
4440 *len = suffix - info;
4444 /* Compute the value of the given RENAMING_SYM, which is expected to
4445 be a symbol encoding a renaming expression. BLOCK is the block
4446 used to evaluate the renaming. */
4448 static struct value *
4449 ada_read_renaming_var_value (struct symbol *renaming_sym,
4450 const struct block *block)
4452 const char *sym_name;
4454 sym_name = SYMBOL_LINKAGE_NAME (renaming_sym);
4455 expression_up expr = parse_exp_1 (&sym_name, 0, block, 0);
4456 return evaluate_expression (expr.get ());
4460 /* Evaluation: Function Calls */
4462 /* Return an lvalue containing the value VAL. This is the identity on
4463 lvalues, and otherwise has the side-effect of allocating memory
4464 in the inferior where a copy of the value contents is copied. */
4466 static struct value *
4467 ensure_lval (struct value *val)
4469 if (VALUE_LVAL (val) == not_lval
4470 || VALUE_LVAL (val) == lval_internalvar)
4472 int len = TYPE_LENGTH (ada_check_typedef (value_type (val)));
4473 const CORE_ADDR addr =
4474 value_as_long (value_allocate_space_in_inferior (len));
4476 VALUE_LVAL (val) = lval_memory;
4477 set_value_address (val, addr);
4478 write_memory (addr, value_contents (val), len);
4484 /* Return the value ACTUAL, converted to be an appropriate value for a
4485 formal of type FORMAL_TYPE. Use *SP as a stack pointer for
4486 allocating any necessary descriptors (fat pointers), or copies of
4487 values not residing in memory, updating it as needed. */
4490 ada_convert_actual (struct value *actual, struct type *formal_type0)
4492 struct type *actual_type = ada_check_typedef (value_type (actual));
4493 struct type *formal_type = ada_check_typedef (formal_type0);
4494 struct type *formal_target =
4495 TYPE_CODE (formal_type) == TYPE_CODE_PTR
4496 ? ada_check_typedef (TYPE_TARGET_TYPE (formal_type)) : formal_type;
4497 struct type *actual_target =
4498 TYPE_CODE (actual_type) == TYPE_CODE_PTR
4499 ? ada_check_typedef (TYPE_TARGET_TYPE (actual_type)) : actual_type;
4501 if (ada_is_array_descriptor_type (formal_target)
4502 && TYPE_CODE (actual_target) == TYPE_CODE_ARRAY)
4503 return make_array_descriptor (formal_type, actual);
4504 else if (TYPE_CODE (formal_type) == TYPE_CODE_PTR
4505 || TYPE_CODE (formal_type) == TYPE_CODE_REF)
4507 struct value *result;
4509 if (TYPE_CODE (formal_target) == TYPE_CODE_ARRAY
4510 && ada_is_array_descriptor_type (actual_target))
4511 result = desc_data (actual);
4512 else if (TYPE_CODE (actual_type) != TYPE_CODE_PTR)
4514 if (VALUE_LVAL (actual) != lval_memory)
4518 actual_type = ada_check_typedef (value_type (actual));
4519 val = allocate_value (actual_type);
4520 memcpy ((char *) value_contents_raw (val),
4521 (char *) value_contents (actual),
4522 TYPE_LENGTH (actual_type));
4523 actual = ensure_lval (val);
4525 result = value_addr (actual);
4529 return value_cast_pointers (formal_type, result, 0);
4531 else if (TYPE_CODE (actual_type) == TYPE_CODE_PTR)
4532 return ada_value_ind (actual);
4533 else if (ada_is_aligner_type (formal_type))
4535 /* We need to turn this parameter into an aligner type
4537 struct value *aligner = allocate_value (formal_type);
4538 struct value *component = ada_value_struct_elt (aligner, "F", 0);
4540 value_assign_to_component (aligner, component, actual);
4547 /* Convert VALUE (which must be an address) to a CORE_ADDR that is a pointer of
4548 type TYPE. This is usually an inefficient no-op except on some targets
4549 (such as AVR) where the representation of a pointer and an address
4553 value_pointer (struct value *value, struct type *type)
4555 struct gdbarch *gdbarch = get_type_arch (type);
4556 unsigned len = TYPE_LENGTH (type);
4557 gdb_byte *buf = (gdb_byte *) alloca (len);
4560 addr = value_address (value);
4561 gdbarch_address_to_pointer (gdbarch, type, buf, addr);
4562 addr = extract_unsigned_integer (buf, len, gdbarch_byte_order (gdbarch));
4567 /* Push a descriptor of type TYPE for array value ARR on the stack at
4568 *SP, updating *SP to reflect the new descriptor. Return either
4569 an lvalue representing the new descriptor, or (if TYPE is a pointer-
4570 to-descriptor type rather than a descriptor type), a struct value *
4571 representing a pointer to this descriptor. */
4573 static struct value *
4574 make_array_descriptor (struct type *type, struct value *arr)
4576 struct type *bounds_type = desc_bounds_type (type);
4577 struct type *desc_type = desc_base_type (type);
4578 struct value *descriptor = allocate_value (desc_type);
4579 struct value *bounds = allocate_value (bounds_type);
4582 for (i = ada_array_arity (ada_check_typedef (value_type (arr)));
4585 modify_field (value_type (bounds), value_contents_writeable (bounds),
4586 ada_array_bound (arr, i, 0),
4587 desc_bound_bitpos (bounds_type, i, 0),
4588 desc_bound_bitsize (bounds_type, i, 0));
4589 modify_field (value_type (bounds), value_contents_writeable (bounds),
4590 ada_array_bound (arr, i, 1),
4591 desc_bound_bitpos (bounds_type, i, 1),
4592 desc_bound_bitsize (bounds_type, i, 1));
4595 bounds = ensure_lval (bounds);
4597 modify_field (value_type (descriptor),
4598 value_contents_writeable (descriptor),
4599 value_pointer (ensure_lval (arr),
4600 TYPE_FIELD_TYPE (desc_type, 0)),
4601 fat_pntr_data_bitpos (desc_type),
4602 fat_pntr_data_bitsize (desc_type));
4604 modify_field (value_type (descriptor),
4605 value_contents_writeable (descriptor),
4606 value_pointer (bounds,
4607 TYPE_FIELD_TYPE (desc_type, 1)),
4608 fat_pntr_bounds_bitpos (desc_type),
4609 fat_pntr_bounds_bitsize (desc_type));
4611 descriptor = ensure_lval (descriptor);
4613 if (TYPE_CODE (type) == TYPE_CODE_PTR)
4614 return value_addr (descriptor);
4619 /* Symbol Cache Module */
4621 /* Performance measurements made as of 2010-01-15 indicate that
4622 this cache does bring some noticeable improvements. Depending
4623 on the type of entity being printed, the cache can make it as much
4624 as an order of magnitude faster than without it.
4626 The descriptive type DWARF extension has significantly reduced
4627 the need for this cache, at least when DWARF is being used. However,
4628 even in this case, some expensive name-based symbol searches are still
4629 sometimes necessary - to find an XVZ variable, mostly. */
4631 /* Initialize the contents of SYM_CACHE. */
4634 ada_init_symbol_cache (struct ada_symbol_cache *sym_cache)
4636 obstack_init (&sym_cache->cache_space);
4637 memset (sym_cache->root, '\000', sizeof (sym_cache->root));
4640 /* Free the memory used by SYM_CACHE. */
4643 ada_free_symbol_cache (struct ada_symbol_cache *sym_cache)
4645 obstack_free (&sym_cache->cache_space, NULL);
4649 /* Return the symbol cache associated to the given program space PSPACE.
4650 If not allocated for this PSPACE yet, allocate and initialize one. */
4652 static struct ada_symbol_cache *
4653 ada_get_symbol_cache (struct program_space *pspace)
4655 struct ada_pspace_data *pspace_data = get_ada_pspace_data (pspace);
4657 if (pspace_data->sym_cache == NULL)
4659 pspace_data->sym_cache = XCNEW (struct ada_symbol_cache);
4660 ada_init_symbol_cache (pspace_data->sym_cache);
4663 return pspace_data->sym_cache;
4666 /* Clear all entries from the symbol cache. */
4669 ada_clear_symbol_cache (void)
4671 struct ada_symbol_cache *sym_cache
4672 = ada_get_symbol_cache (current_program_space);
4674 obstack_free (&sym_cache->cache_space, NULL);
4675 ada_init_symbol_cache (sym_cache);
4678 /* Search our cache for an entry matching NAME and DOMAIN.
4679 Return it if found, or NULL otherwise. */
4681 static struct cache_entry **
4682 find_entry (const char *name, domain_enum domain)
4684 struct ada_symbol_cache *sym_cache
4685 = ada_get_symbol_cache (current_program_space);
4686 int h = msymbol_hash (name) % HASH_SIZE;
4687 struct cache_entry **e;
4689 for (e = &sym_cache->root[h]; *e != NULL; e = &(*e)->next)
4691 if (domain == (*e)->domain && strcmp (name, (*e)->name) == 0)
4697 /* Search the symbol cache for an entry matching NAME and DOMAIN.
4698 Return 1 if found, 0 otherwise.
4700 If an entry was found and SYM is not NULL, set *SYM to the entry's
4701 SYM. Same principle for BLOCK if not NULL. */
4704 lookup_cached_symbol (const char *name, domain_enum domain,
4705 struct symbol **sym, const struct block **block)
4707 struct cache_entry **e = find_entry (name, domain);
4714 *block = (*e)->block;
4718 /* Assuming that (SYM, BLOCK) is the result of the lookup of NAME
4719 in domain DOMAIN, save this result in our symbol cache. */
4722 cache_symbol (const char *name, domain_enum domain, struct symbol *sym,
4723 const struct block *block)
4725 struct ada_symbol_cache *sym_cache
4726 = ada_get_symbol_cache (current_program_space);
4729 struct cache_entry *e;
4731 /* Symbols for builtin types don't have a block.
4732 For now don't cache such symbols. */
4733 if (sym != NULL && !SYMBOL_OBJFILE_OWNED (sym))
4736 /* If the symbol is a local symbol, then do not cache it, as a search
4737 for that symbol depends on the context. To determine whether
4738 the symbol is local or not, we check the block where we found it
4739 against the global and static blocks of its associated symtab. */
4741 && BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symbol_symtab (sym)),
4742 GLOBAL_BLOCK) != block
4743 && BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symbol_symtab (sym)),
4744 STATIC_BLOCK) != block)
4747 h = msymbol_hash (name) % HASH_SIZE;
4748 e = (struct cache_entry *) obstack_alloc (&sym_cache->cache_space,
4750 e->next = sym_cache->root[h];
4751 sym_cache->root[h] = e;
4753 = (char *) obstack_alloc (&sym_cache->cache_space, strlen (name) + 1);
4754 strcpy (copy, name);
4762 /* Return nonzero if wild matching should be used when searching for
4763 all symbols matching LOOKUP_NAME.
4765 LOOKUP_NAME is expected to be a symbol name after transformation
4766 for Ada lookups (see ada_name_for_lookup). */
4769 should_use_wild_match (const char *lookup_name)
4771 return (strstr (lookup_name, "__") == NULL);
4774 /* Return the result of a standard (literal, C-like) lookup of NAME in
4775 given DOMAIN, visible from lexical block BLOCK. */
4777 static struct symbol *
4778 standard_lookup (const char *name, const struct block *block,
4781 /* Initialize it just to avoid a GCC false warning. */
4782 struct block_symbol sym = {NULL, NULL};
4784 if (lookup_cached_symbol (name, domain, &sym.symbol, NULL))
4786 sym = lookup_symbol_in_language (name, block, domain, language_c, 0);
4787 cache_symbol (name, domain, sym.symbol, sym.block);
4792 /* Non-zero iff there is at least one non-function/non-enumeral symbol
4793 in the symbol fields of SYMS[0..N-1]. We treat enumerals as functions,
4794 since they contend in overloading in the same way. */
4796 is_nonfunction (struct block_symbol syms[], int n)
4800 for (i = 0; i < n; i += 1)
4801 if (TYPE_CODE (SYMBOL_TYPE (syms[i].symbol)) != TYPE_CODE_FUNC
4802 && (TYPE_CODE (SYMBOL_TYPE (syms[i].symbol)) != TYPE_CODE_ENUM
4803 || SYMBOL_CLASS (syms[i].symbol) != LOC_CONST))
4809 /* If true (non-zero), then TYPE0 and TYPE1 represent equivalent
4810 struct types. Otherwise, they may not. */
4813 equiv_types (struct type *type0, struct type *type1)
4817 if (type0 == NULL || type1 == NULL
4818 || TYPE_CODE (type0) != TYPE_CODE (type1))
4820 if ((TYPE_CODE (type0) == TYPE_CODE_STRUCT
4821 || TYPE_CODE (type0) == TYPE_CODE_ENUM)
4822 && ada_type_name (type0) != NULL && ada_type_name (type1) != NULL
4823 && strcmp (ada_type_name (type0), ada_type_name (type1)) == 0)
4829 /* True iff SYM0 represents the same entity as SYM1, or one that is
4830 no more defined than that of SYM1. */
4833 lesseq_defined_than (struct symbol *sym0, struct symbol *sym1)
4837 if (SYMBOL_DOMAIN (sym0) != SYMBOL_DOMAIN (sym1)
4838 || SYMBOL_CLASS (sym0) != SYMBOL_CLASS (sym1))
4841 switch (SYMBOL_CLASS (sym0))
4847 struct type *type0 = SYMBOL_TYPE (sym0);
4848 struct type *type1 = SYMBOL_TYPE (sym1);
4849 const char *name0 = SYMBOL_LINKAGE_NAME (sym0);
4850 const char *name1 = SYMBOL_LINKAGE_NAME (sym1);
4851 int len0 = strlen (name0);
4854 TYPE_CODE (type0) == TYPE_CODE (type1)
4855 && (equiv_types (type0, type1)
4856 || (len0 < strlen (name1) && strncmp (name0, name1, len0) == 0
4857 && startswith (name1 + len0, "___XV")));
4860 return SYMBOL_VALUE (sym0) == SYMBOL_VALUE (sym1)
4861 && equiv_types (SYMBOL_TYPE (sym0), SYMBOL_TYPE (sym1));
4867 /* Append (SYM,BLOCK,SYMTAB) to the end of the array of struct block_symbol
4868 records in OBSTACKP. Do nothing if SYM is a duplicate. */
4871 add_defn_to_vec (struct obstack *obstackp,
4873 const struct block *block)
4876 struct block_symbol *prevDefns = defns_collected (obstackp, 0);
4878 /* Do not try to complete stub types, as the debugger is probably
4879 already scanning all symbols matching a certain name at the
4880 time when this function is called. Trying to replace the stub
4881 type by its associated full type will cause us to restart a scan
4882 which may lead to an infinite recursion. Instead, the client
4883 collecting the matching symbols will end up collecting several
4884 matches, with at least one of them complete. It can then filter
4885 out the stub ones if needed. */
4887 for (i = num_defns_collected (obstackp) - 1; i >= 0; i -= 1)
4889 if (lesseq_defined_than (sym, prevDefns[i].symbol))
4891 else if (lesseq_defined_than (prevDefns[i].symbol, sym))
4893 prevDefns[i].symbol = sym;
4894 prevDefns[i].block = block;
4900 struct block_symbol info;
4904 obstack_grow (obstackp, &info, sizeof (struct block_symbol));
4908 /* Number of block_symbol structures currently collected in current vector in
4912 num_defns_collected (struct obstack *obstackp)
4914 return obstack_object_size (obstackp) / sizeof (struct block_symbol);
4917 /* Vector of block_symbol structures currently collected in current vector in
4918 OBSTACKP. If FINISH, close off the vector and return its final address. */
4920 static struct block_symbol *
4921 defns_collected (struct obstack *obstackp, int finish)
4924 return (struct block_symbol *) obstack_finish (obstackp);
4926 return (struct block_symbol *) obstack_base (obstackp);
4929 /* Return a bound minimal symbol matching NAME according to Ada
4930 decoding rules. Returns an invalid symbol if there is no such
4931 minimal symbol. Names prefixed with "standard__" are handled
4932 specially: "standard__" is first stripped off, and only static and
4933 global symbols are searched. */
4935 struct bound_minimal_symbol
4936 ada_lookup_simple_minsym (const char *name)
4938 struct bound_minimal_symbol result;
4939 struct objfile *objfile;
4940 struct minimal_symbol *msymbol;
4941 const int wild_match_p = should_use_wild_match (name);
4943 memset (&result, 0, sizeof (result));
4945 /* Special case: If the user specifies a symbol name inside package
4946 Standard, do a non-wild matching of the symbol name without
4947 the "standard__" prefix. This was primarily introduced in order
4948 to allow the user to specifically access the standard exceptions
4949 using, for instance, Standard.Constraint_Error when Constraint_Error
4950 is ambiguous (due to the user defining its own Constraint_Error
4951 entity inside its program). */
4952 if (startswith (name, "standard__"))
4953 name += sizeof ("standard__") - 1;
4955 ALL_MSYMBOLS (objfile, msymbol)
4957 if (match_name (MSYMBOL_LINKAGE_NAME (msymbol), name, wild_match_p)
4958 && MSYMBOL_TYPE (msymbol) != mst_solib_trampoline)
4960 result.minsym = msymbol;
4961 result.objfile = objfile;
4969 /* For all subprograms that statically enclose the subprogram of the
4970 selected frame, add symbols matching identifier NAME in DOMAIN
4971 and their blocks to the list of data in OBSTACKP, as for
4972 ada_add_block_symbols (q.v.). If WILD_MATCH_P, treat as NAME
4973 with a wildcard prefix. */
4976 add_symbols_from_enclosing_procs (struct obstack *obstackp,
4977 const char *name, domain_enum domain,
4982 /* True if TYPE is definitely an artificial type supplied to a symbol
4983 for which no debugging information was given in the symbol file. */
4986 is_nondebugging_type (struct type *type)
4988 const char *name = ada_type_name (type);
4990 return (name != NULL && strcmp (name, "<variable, no debug info>") == 0);
4993 /* Return nonzero if TYPE1 and TYPE2 are two enumeration types
4994 that are deemed "identical" for practical purposes.
4996 This function assumes that TYPE1 and TYPE2 are both TYPE_CODE_ENUM
4997 types and that their number of enumerals is identical (in other
4998 words, TYPE_NFIELDS (type1) == TYPE_NFIELDS (type2)). */
5001 ada_identical_enum_types_p (struct type *type1, struct type *type2)
5005 /* The heuristic we use here is fairly conservative. We consider
5006 that 2 enumerate types are identical if they have the same
5007 number of enumerals and that all enumerals have the same
5008 underlying value and name. */
5010 /* All enums in the type should have an identical underlying value. */
5011 for (i = 0; i < TYPE_NFIELDS (type1); i++)
5012 if (TYPE_FIELD_ENUMVAL (type1, i) != TYPE_FIELD_ENUMVAL (type2, i))
5015 /* All enumerals should also have the same name (modulo any numerical
5017 for (i = 0; i < TYPE_NFIELDS (type1); i++)
5019 const char *name_1 = TYPE_FIELD_NAME (type1, i);
5020 const char *name_2 = TYPE_FIELD_NAME (type2, i);
5021 int len_1 = strlen (name_1);
5022 int len_2 = strlen (name_2);
5024 ada_remove_trailing_digits (TYPE_FIELD_NAME (type1, i), &len_1);
5025 ada_remove_trailing_digits (TYPE_FIELD_NAME (type2, i), &len_2);
5027 || strncmp (TYPE_FIELD_NAME (type1, i),
5028 TYPE_FIELD_NAME (type2, i),
5036 /* Return nonzero if all the symbols in SYMS are all enumeral symbols
5037 that are deemed "identical" for practical purposes. Sometimes,
5038 enumerals are not strictly identical, but their types are so similar
5039 that they can be considered identical.
5041 For instance, consider the following code:
5043 type Color is (Black, Red, Green, Blue, White);
5044 type RGB_Color is new Color range Red .. Blue;
5046 Type RGB_Color is a subrange of an implicit type which is a copy
5047 of type Color. If we call that implicit type RGB_ColorB ("B" is
5048 for "Base Type"), then type RGB_ColorB is a copy of type Color.
5049 As a result, when an expression references any of the enumeral
5050 by name (Eg. "print green"), the expression is technically
5051 ambiguous and the user should be asked to disambiguate. But
5052 doing so would only hinder the user, since it wouldn't matter
5053 what choice he makes, the outcome would always be the same.
5054 So, for practical purposes, we consider them as the same. */
5057 symbols_are_identical_enums (struct block_symbol *syms, int nsyms)
5061 /* Before performing a thorough comparison check of each type,
5062 we perform a series of inexpensive checks. We expect that these
5063 checks will quickly fail in the vast majority of cases, and thus
5064 help prevent the unnecessary use of a more expensive comparison.
5065 Said comparison also expects us to make some of these checks
5066 (see ada_identical_enum_types_p). */
5068 /* Quick check: All symbols should have an enum type. */
5069 for (i = 0; i < nsyms; i++)
5070 if (TYPE_CODE (SYMBOL_TYPE (syms[i].symbol)) != TYPE_CODE_ENUM)
5073 /* Quick check: They should all have the same value. */
5074 for (i = 1; i < nsyms; i++)
5075 if (SYMBOL_VALUE (syms[i].symbol) != SYMBOL_VALUE (syms[0].symbol))
5078 /* Quick check: They should all have the same number of enumerals. */
5079 for (i = 1; i < nsyms; i++)
5080 if (TYPE_NFIELDS (SYMBOL_TYPE (syms[i].symbol))
5081 != TYPE_NFIELDS (SYMBOL_TYPE (syms[0].symbol)))
5084 /* All the sanity checks passed, so we might have a set of
5085 identical enumeration types. Perform a more complete
5086 comparison of the type of each symbol. */
5087 for (i = 1; i < nsyms; i++)
5088 if (!ada_identical_enum_types_p (SYMBOL_TYPE (syms[i].symbol),
5089 SYMBOL_TYPE (syms[0].symbol)))
5095 /* Remove any non-debugging symbols in SYMS[0 .. NSYMS-1] that definitely
5096 duplicate other symbols in the list (The only case I know of where
5097 this happens is when object files containing stabs-in-ecoff are
5098 linked with files containing ordinary ecoff debugging symbols (or no
5099 debugging symbols)). Modifies SYMS to squeeze out deleted entries.
5100 Returns the number of items in the modified list. */
5103 remove_extra_symbols (struct block_symbol *syms, int nsyms)
5107 /* We should never be called with less than 2 symbols, as there
5108 cannot be any extra symbol in that case. But it's easy to
5109 handle, since we have nothing to do in that case. */
5118 /* If two symbols have the same name and one of them is a stub type,
5119 the get rid of the stub. */
5121 if (TYPE_STUB (SYMBOL_TYPE (syms[i].symbol))
5122 && SYMBOL_LINKAGE_NAME (syms[i].symbol) != NULL)
5124 for (j = 0; j < nsyms; j++)
5127 && !TYPE_STUB (SYMBOL_TYPE (syms[j].symbol))
5128 && SYMBOL_LINKAGE_NAME (syms[j].symbol) != NULL
5129 && strcmp (SYMBOL_LINKAGE_NAME (syms[i].symbol),
5130 SYMBOL_LINKAGE_NAME (syms[j].symbol)) == 0)
5135 /* Two symbols with the same name, same class and same address
5136 should be identical. */
5138 else if (SYMBOL_LINKAGE_NAME (syms[i].symbol) != NULL
5139 && SYMBOL_CLASS (syms[i].symbol) == LOC_STATIC
5140 && is_nondebugging_type (SYMBOL_TYPE (syms[i].symbol)))
5142 for (j = 0; j < nsyms; j += 1)
5145 && SYMBOL_LINKAGE_NAME (syms[j].symbol) != NULL
5146 && strcmp (SYMBOL_LINKAGE_NAME (syms[i].symbol),
5147 SYMBOL_LINKAGE_NAME (syms[j].symbol)) == 0
5148 && SYMBOL_CLASS (syms[i].symbol)
5149 == SYMBOL_CLASS (syms[j].symbol)
5150 && SYMBOL_VALUE_ADDRESS (syms[i].symbol)
5151 == SYMBOL_VALUE_ADDRESS (syms[j].symbol))
5158 for (j = i + 1; j < nsyms; j += 1)
5159 syms[j - 1] = syms[j];
5166 /* If all the remaining symbols are identical enumerals, then
5167 just keep the first one and discard the rest.
5169 Unlike what we did previously, we do not discard any entry
5170 unless they are ALL identical. This is because the symbol
5171 comparison is not a strict comparison, but rather a practical
5172 comparison. If all symbols are considered identical, then
5173 we can just go ahead and use the first one and discard the rest.
5174 But if we cannot reduce the list to a single element, we have
5175 to ask the user to disambiguate anyways. And if we have to
5176 present a multiple-choice menu, it's less confusing if the list
5177 isn't missing some choices that were identical and yet distinct. */
5178 if (symbols_are_identical_enums (syms, nsyms))
5184 /* Given a type that corresponds to a renaming entity, use the type name
5185 to extract the scope (package name or function name, fully qualified,
5186 and following the GNAT encoding convention) where this renaming has been
5187 defined. The string returned needs to be deallocated after use. */
5190 xget_renaming_scope (struct type *renaming_type)
5192 /* The renaming types adhere to the following convention:
5193 <scope>__<rename>___<XR extension>.
5194 So, to extract the scope, we search for the "___XR" extension,
5195 and then backtrack until we find the first "__". */
5197 const char *name = type_name_no_tag (renaming_type);
5198 const char *suffix = strstr (name, "___XR");
5203 /* Now, backtrack a bit until we find the first "__". Start looking
5204 at suffix - 3, as the <rename> part is at least one character long. */
5206 for (last = suffix - 3; last > name; last--)
5207 if (last[0] == '_' && last[1] == '_')
5210 /* Make a copy of scope and return it. */
5212 scope_len = last - name;
5213 scope = (char *) xmalloc ((scope_len + 1) * sizeof (char));
5215 strncpy (scope, name, scope_len);
5216 scope[scope_len] = '\0';
5221 /* Return nonzero if NAME corresponds to a package name. */
5224 is_package_name (const char *name)
5226 /* Here, We take advantage of the fact that no symbols are generated
5227 for packages, while symbols are generated for each function.
5228 So the condition for NAME represent a package becomes equivalent
5229 to NAME not existing in our list of symbols. There is only one
5230 small complication with library-level functions (see below). */
5234 /* If it is a function that has not been defined at library level,
5235 then we should be able to look it up in the symbols. */
5236 if (standard_lookup (name, NULL, VAR_DOMAIN) != NULL)
5239 /* Library-level function names start with "_ada_". See if function
5240 "_ada_" followed by NAME can be found. */
5242 /* Do a quick check that NAME does not contain "__", since library-level
5243 functions names cannot contain "__" in them. */
5244 if (strstr (name, "__") != NULL)
5247 fun_name = xstrprintf ("_ada_%s", name);
5249 return (standard_lookup (fun_name, NULL, VAR_DOMAIN) == NULL);
5252 /* Return nonzero if SYM corresponds to a renaming entity that is
5253 not visible from FUNCTION_NAME. */
5256 old_renaming_is_invisible (const struct symbol *sym, const char *function_name)
5259 struct cleanup *old_chain;
5261 if (SYMBOL_CLASS (sym) != LOC_TYPEDEF)
5264 scope = xget_renaming_scope (SYMBOL_TYPE (sym));
5265 old_chain = make_cleanup (xfree, scope);
5267 /* If the rename has been defined in a package, then it is visible. */
5268 if (is_package_name (scope))
5270 do_cleanups (old_chain);
5274 /* Check that the rename is in the current function scope by checking
5275 that its name starts with SCOPE. */
5277 /* If the function name starts with "_ada_", it means that it is
5278 a library-level function. Strip this prefix before doing the
5279 comparison, as the encoding for the renaming does not contain
5281 if (startswith (function_name, "_ada_"))
5285 int is_invisible = !startswith (function_name, scope);
5287 do_cleanups (old_chain);
5288 return is_invisible;
5292 /* Remove entries from SYMS that corresponds to a renaming entity that
5293 is not visible from the function associated with CURRENT_BLOCK or
5294 that is superfluous due to the presence of more specific renaming
5295 information. Places surviving symbols in the initial entries of
5296 SYMS and returns the number of surviving symbols.
5299 First, in cases where an object renaming is implemented as a
5300 reference variable, GNAT may produce both the actual reference
5301 variable and the renaming encoding. In this case, we discard the
5304 Second, GNAT emits a type following a specified encoding for each renaming
5305 entity. Unfortunately, STABS currently does not support the definition
5306 of types that are local to a given lexical block, so all renamings types
5307 are emitted at library level. As a consequence, if an application
5308 contains two renaming entities using the same name, and a user tries to
5309 print the value of one of these entities, the result of the ada symbol
5310 lookup will also contain the wrong renaming type.
5312 This function partially covers for this limitation by attempting to
5313 remove from the SYMS list renaming symbols that should be visible
5314 from CURRENT_BLOCK. However, there does not seem be a 100% reliable
5315 method with the current information available. The implementation
5316 below has a couple of limitations (FIXME: brobecker-2003-05-12):
5318 - When the user tries to print a rename in a function while there
5319 is another rename entity defined in a package: Normally, the
5320 rename in the function has precedence over the rename in the
5321 package, so the latter should be removed from the list. This is
5322 currently not the case.
5324 - This function will incorrectly remove valid renames if
5325 the CURRENT_BLOCK corresponds to a function which symbol name
5326 has been changed by an "Export" pragma. As a consequence,
5327 the user will be unable to print such rename entities. */
5330 remove_irrelevant_renamings (struct block_symbol *syms,
5331 int nsyms, const struct block *current_block)
5333 struct symbol *current_function;
5334 const char *current_function_name;
5336 int is_new_style_renaming;
5338 /* If there is both a renaming foo___XR... encoded as a variable and
5339 a simple variable foo in the same block, discard the latter.
5340 First, zero out such symbols, then compress. */
5341 is_new_style_renaming = 0;
5342 for (i = 0; i < nsyms; i += 1)
5344 struct symbol *sym = syms[i].symbol;
5345 const struct block *block = syms[i].block;
5349 if (sym == NULL || SYMBOL_CLASS (sym) == LOC_TYPEDEF)
5351 name = SYMBOL_LINKAGE_NAME (sym);
5352 suffix = strstr (name, "___XR");
5356 int name_len = suffix - name;
5359 is_new_style_renaming = 1;
5360 for (j = 0; j < nsyms; j += 1)
5361 if (i != j && syms[j].symbol != NULL
5362 && strncmp (name, SYMBOL_LINKAGE_NAME (syms[j].symbol),
5364 && block == syms[j].block)
5365 syms[j].symbol = NULL;
5368 if (is_new_style_renaming)
5372 for (j = k = 0; j < nsyms; j += 1)
5373 if (syms[j].symbol != NULL)
5381 /* Extract the function name associated to CURRENT_BLOCK.
5382 Abort if unable to do so. */
5384 if (current_block == NULL)
5387 current_function = block_linkage_function (current_block);
5388 if (current_function == NULL)
5391 current_function_name = SYMBOL_LINKAGE_NAME (current_function);
5392 if (current_function_name == NULL)
5395 /* Check each of the symbols, and remove it from the list if it is
5396 a type corresponding to a renaming that is out of the scope of
5397 the current block. */
5402 if (ada_parse_renaming (syms[i].symbol, NULL, NULL, NULL)
5403 == ADA_OBJECT_RENAMING
5404 && old_renaming_is_invisible (syms[i].symbol, current_function_name))
5408 for (j = i + 1; j < nsyms; j += 1)
5409 syms[j - 1] = syms[j];
5419 /* Add to OBSTACKP all symbols from BLOCK (and its super-blocks)
5420 whose name and domain match NAME and DOMAIN respectively.
5421 If no match was found, then extend the search to "enclosing"
5422 routines (in other words, if we're inside a nested function,
5423 search the symbols defined inside the enclosing functions).
5424 If WILD_MATCH_P is nonzero, perform the naming matching in
5425 "wild" mode (see function "wild_match" for more info).
5427 Note: This function assumes that OBSTACKP has 0 (zero) element in it. */
5430 ada_add_local_symbols (struct obstack *obstackp, const char *name,
5431 const struct block *block, domain_enum domain,
5434 int block_depth = 0;
5436 while (block != NULL)
5439 ada_add_block_symbols (obstackp, block, name, domain, NULL,
5442 /* If we found a non-function match, assume that's the one. */
5443 if (is_nonfunction (defns_collected (obstackp, 0),
5444 num_defns_collected (obstackp)))
5447 block = BLOCK_SUPERBLOCK (block);
5450 /* If no luck so far, try to find NAME as a local symbol in some lexically
5451 enclosing subprogram. */
5452 if (num_defns_collected (obstackp) == 0 && block_depth > 2)
5453 add_symbols_from_enclosing_procs (obstackp, name, domain, wild_match_p);
5456 /* An object of this type is used as the user_data argument when
5457 calling the map_matching_symbols method. */
5461 struct objfile *objfile;
5462 struct obstack *obstackp;
5463 struct symbol *arg_sym;
5467 /* A callback for add_nonlocal_symbols that adds SYM, found in BLOCK,
5468 to a list of symbols. DATA0 is a pointer to a struct match_data *
5469 containing the obstack that collects the symbol list, the file that SYM
5470 must come from, a flag indicating whether a non-argument symbol has
5471 been found in the current block, and the last argument symbol
5472 passed in SYM within the current block (if any). When SYM is null,
5473 marking the end of a block, the argument symbol is added if no
5474 other has been found. */
5477 aux_add_nonlocal_symbols (struct block *block, struct symbol *sym, void *data0)
5479 struct match_data *data = (struct match_data *) data0;
5483 if (!data->found_sym && data->arg_sym != NULL)
5484 add_defn_to_vec (data->obstackp,
5485 fixup_symbol_section (data->arg_sym, data->objfile),
5487 data->found_sym = 0;
5488 data->arg_sym = NULL;
5492 if (SYMBOL_CLASS (sym) == LOC_UNRESOLVED)
5494 else if (SYMBOL_IS_ARGUMENT (sym))
5495 data->arg_sym = sym;
5498 data->found_sym = 1;
5499 add_defn_to_vec (data->obstackp,
5500 fixup_symbol_section (sym, data->objfile),
5507 /* Helper for add_nonlocal_symbols. Find symbols in DOMAIN which are targetted
5508 by renamings matching NAME in BLOCK. Add these symbols to OBSTACKP. If
5509 WILD_MATCH_P is nonzero, perform the naming matching in "wild" mode (see
5510 function "wild_match" for more information). Return whether we found such
5514 ada_add_block_renamings (struct obstack *obstackp,
5515 const struct block *block,
5520 struct using_direct *renaming;
5521 int defns_mark = num_defns_collected (obstackp);
5523 for (renaming = block_using (block);
5525 renaming = renaming->next)
5530 /* Avoid infinite recursions: skip this renaming if we are actually
5531 already traversing it.
5533 Currently, symbol lookup in Ada don't use the namespace machinery from
5534 C++/Fortran support: skip namespace imports that use them. */
5535 if (renaming->searched
5536 || (renaming->import_src != NULL
5537 && renaming->import_src[0] != '\0')
5538 || (renaming->import_dest != NULL
5539 && renaming->import_dest[0] != '\0'))
5541 renaming->searched = 1;
5543 /* TODO: here, we perform another name-based symbol lookup, which can
5544 pull its own multiple overloads. In theory, we should be able to do
5545 better in this case since, in DWARF, DW_AT_import is a DIE reference,
5546 not a simple name. But in order to do this, we would need to enhance
5547 the DWARF reader to associate a symbol to this renaming, instead of a
5548 name. So, for now, we do something simpler: re-use the C++/Fortran
5549 namespace machinery. */
5550 r_name = (renaming->alias != NULL
5552 : renaming->declaration);
5554 = wild_match_p ? wild_match (r_name, name) : strcmp (r_name, name);
5555 if (name_match == 0)
5556 ada_add_all_symbols (obstackp, block, renaming->declaration, domain,
5558 renaming->searched = 0;
5560 return num_defns_collected (obstackp) != defns_mark;
5563 /* Implements compare_names, but only applying the comparision using
5564 the given CASING. */
5567 compare_names_with_case (const char *string1, const char *string2,
5568 enum case_sensitivity casing)
5570 while (*string1 != '\0' && *string2 != '\0')
5574 if (isspace (*string1) || isspace (*string2))
5575 return strcmp_iw_ordered (string1, string2);
5577 if (casing == case_sensitive_off)
5579 c1 = tolower (*string1);
5580 c2 = tolower (*string2);
5597 return strcmp_iw_ordered (string1, string2);
5599 if (*string2 == '\0')
5601 if (is_name_suffix (string1))
5608 if (*string2 == '(')
5609 return strcmp_iw_ordered (string1, string2);
5612 if (casing == case_sensitive_off)
5613 return tolower (*string1) - tolower (*string2);
5615 return *string1 - *string2;
5620 /* Compare STRING1 to STRING2, with results as for strcmp.
5621 Compatible with strcmp_iw_ordered in that...
5623 strcmp_iw_ordered (STRING1, STRING2) <= 0
5627 compare_names (STRING1, STRING2) <= 0
5629 (they may differ as to what symbols compare equal). */
5632 compare_names (const char *string1, const char *string2)
5636 /* Similar to what strcmp_iw_ordered does, we need to perform
5637 a case-insensitive comparison first, and only resort to
5638 a second, case-sensitive, comparison if the first one was
5639 not sufficient to differentiate the two strings. */
5641 result = compare_names_with_case (string1, string2, case_sensitive_off);
5643 result = compare_names_with_case (string1, string2, case_sensitive_on);
5648 /* Add to OBSTACKP all non-local symbols whose name and domain match
5649 NAME and DOMAIN respectively. The search is performed on GLOBAL_BLOCK
5650 symbols if GLOBAL is non-zero, or on STATIC_BLOCK symbols otherwise. */
5653 add_nonlocal_symbols (struct obstack *obstackp, const char *name,
5654 domain_enum domain, int global,
5657 struct objfile *objfile;
5658 struct compunit_symtab *cu;
5659 struct match_data data;
5661 memset (&data, 0, sizeof data);
5662 data.obstackp = obstackp;
5664 ALL_OBJFILES (objfile)
5666 data.objfile = objfile;
5669 objfile->sf->qf->map_matching_symbols (objfile, name, domain, global,
5670 aux_add_nonlocal_symbols, &data,
5673 objfile->sf->qf->map_matching_symbols (objfile, name, domain, global,
5674 aux_add_nonlocal_symbols, &data,
5675 full_match, compare_names);
5677 ALL_OBJFILE_COMPUNITS (objfile, cu)
5679 const struct block *global_block
5680 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cu), GLOBAL_BLOCK);
5682 if (ada_add_block_renamings (obstackp, global_block , name, domain,
5688 if (num_defns_collected (obstackp) == 0 && global && !is_wild_match)
5690 ALL_OBJFILES (objfile)
5692 char *name1 = (char *) alloca (strlen (name) + sizeof ("_ada_"));
5693 strcpy (name1, "_ada_");
5694 strcpy (name1 + sizeof ("_ada_") - 1, name);
5695 data.objfile = objfile;
5696 objfile->sf->qf->map_matching_symbols (objfile, name1, domain,
5698 aux_add_nonlocal_symbols,
5700 full_match, compare_names);
5705 /* Find symbols in DOMAIN matching NAME, in BLOCK and, if FULL_SEARCH is
5706 non-zero, enclosing scope and in global scopes, returning the number of
5707 matches. Add these to OBSTACKP.
5709 When FULL_SEARCH is non-zero, any non-function/non-enumeral
5710 symbol match within the nest of blocks whose innermost member is BLOCK,
5711 is the one match returned (no other matches in that or
5712 enclosing blocks is returned). If there are any matches in or
5713 surrounding BLOCK, then these alone are returned.
5715 Names prefixed with "standard__" are handled specially: "standard__"
5716 is first stripped off, and only static and global symbols are searched.
5718 If MADE_GLOBAL_LOOKUP_P is non-null, set it before return to whether we had
5719 to lookup global symbols. */
5722 ada_add_all_symbols (struct obstack *obstackp,
5723 const struct block *block,
5727 int *made_global_lookup_p)
5730 const int wild_match_p = should_use_wild_match (name);
5732 if (made_global_lookup_p)
5733 *made_global_lookup_p = 0;
5735 /* Special case: If the user specifies a symbol name inside package
5736 Standard, do a non-wild matching of the symbol name without
5737 the "standard__" prefix. This was primarily introduced in order
5738 to allow the user to specifically access the standard exceptions
5739 using, for instance, Standard.Constraint_Error when Constraint_Error
5740 is ambiguous (due to the user defining its own Constraint_Error
5741 entity inside its program). */
5742 if (startswith (name, "standard__"))
5745 name = name + sizeof ("standard__") - 1;
5748 /* Check the non-global symbols. If we have ANY match, then we're done. */
5753 ada_add_local_symbols (obstackp, name, block, domain, wild_match_p);
5756 /* In the !full_search case we're are being called by
5757 ada_iterate_over_symbols, and we don't want to search
5759 ada_add_block_symbols (obstackp, block, name, domain, NULL,
5762 if (num_defns_collected (obstackp) > 0 || !full_search)
5766 /* No non-global symbols found. Check our cache to see if we have
5767 already performed this search before. If we have, then return
5770 if (lookup_cached_symbol (name, domain, &sym, &block))
5773 add_defn_to_vec (obstackp, sym, block);
5777 if (made_global_lookup_p)
5778 *made_global_lookup_p = 1;
5780 /* Search symbols from all global blocks. */
5782 add_nonlocal_symbols (obstackp, name, domain, 1, wild_match_p);
5784 /* Now add symbols from all per-file blocks if we've gotten no hits
5785 (not strictly correct, but perhaps better than an error). */
5787 if (num_defns_collected (obstackp) == 0)
5788 add_nonlocal_symbols (obstackp, name, domain, 0, wild_match_p);
5791 /* Find symbols in DOMAIN matching NAME, in BLOCK and, if full_search is
5792 non-zero, enclosing scope and in global scopes, returning the number of
5794 Sets *RESULTS to point to a vector of (SYM,BLOCK) tuples,
5795 indicating the symbols found and the blocks and symbol tables (if
5796 any) in which they were found. This vector is transient---good only to
5797 the next call of ada_lookup_symbol_list.
5799 When full_search is non-zero, any non-function/non-enumeral
5800 symbol match within the nest of blocks whose innermost member is BLOCK,
5801 is the one match returned (no other matches in that or
5802 enclosing blocks is returned). If there are any matches in or
5803 surrounding BLOCK, then these alone are returned.
5805 Names prefixed with "standard__" are handled specially: "standard__"
5806 is first stripped off, and only static and global symbols are searched. */
5809 ada_lookup_symbol_list_worker (const char *name, const struct block *block,
5811 struct block_symbol **results,
5814 const int wild_match_p = should_use_wild_match (name);
5815 int syms_from_global_search;
5818 obstack_free (&symbol_list_obstack, NULL);
5819 obstack_init (&symbol_list_obstack);
5820 ada_add_all_symbols (&symbol_list_obstack, block, name, domain,
5821 full_search, &syms_from_global_search);
5823 ndefns = num_defns_collected (&symbol_list_obstack);
5824 *results = defns_collected (&symbol_list_obstack, 1);
5826 ndefns = remove_extra_symbols (*results, ndefns);
5828 if (ndefns == 0 && full_search && syms_from_global_search)
5829 cache_symbol (name, domain, NULL, NULL);
5831 if (ndefns == 1 && full_search && syms_from_global_search)
5832 cache_symbol (name, domain, (*results)[0].symbol, (*results)[0].block);
5834 ndefns = remove_irrelevant_renamings (*results, ndefns, block);
5838 /* Find symbols in DOMAIN matching NAME0, in BLOCK0 and enclosing scope and
5839 in global scopes, returning the number of matches, and setting *RESULTS
5840 to a vector of (SYM,BLOCK) tuples.
5841 See ada_lookup_symbol_list_worker for further details. */
5844 ada_lookup_symbol_list (const char *name0, const struct block *block0,
5845 domain_enum domain, struct block_symbol **results)
5847 return ada_lookup_symbol_list_worker (name0, block0, domain, results, 1);
5850 /* Implementation of the la_iterate_over_symbols method. */
5853 ada_iterate_over_symbols (const struct block *block,
5854 const char *name, domain_enum domain,
5855 symbol_found_callback_ftype *callback,
5859 struct block_symbol *results;
5861 ndefs = ada_lookup_symbol_list_worker (name, block, domain, &results, 0);
5862 for (i = 0; i < ndefs; ++i)
5864 if (! (*callback) (results[i].symbol, data))
5869 /* If NAME is the name of an entity, return a string that should
5870 be used to look that entity up in Ada units.
5872 NAME can have any form that the "break" or "print" commands might
5873 recognize. In other words, it does not have to be the "natural"
5874 name, or the "encoded" name. */
5877 ada_name_for_lookup (const char *name)
5879 int nlen = strlen (name);
5881 if (name[0] == '<' && name[nlen - 1] == '>')
5882 return std::string (name + 1, nlen - 2);
5884 return ada_encode (ada_fold_name (name));
5887 /* The result is as for ada_lookup_symbol_list with FULL_SEARCH set
5888 to 1, but choosing the first symbol found if there are multiple
5891 The result is stored in *INFO, which must be non-NULL.
5892 If no match is found, INFO->SYM is set to NULL. */
5895 ada_lookup_encoded_symbol (const char *name, const struct block *block,
5897 struct block_symbol *info)
5899 struct block_symbol *candidates;
5902 gdb_assert (info != NULL);
5903 memset (info, 0, sizeof (struct block_symbol));
5905 n_candidates = ada_lookup_symbol_list (name, block, domain, &candidates);
5906 if (n_candidates == 0)
5909 *info = candidates[0];
5910 info->symbol = fixup_symbol_section (info->symbol, NULL);
5913 /* Return a symbol in DOMAIN matching NAME, in BLOCK0 and enclosing
5914 scope and in global scopes, or NULL if none. NAME is folded and
5915 encoded first. Otherwise, the result is as for ada_lookup_symbol_list,
5916 choosing the first symbol if there are multiple choices.
5917 If IS_A_FIELD_OF_THIS is not NULL, it is set to zero. */
5920 ada_lookup_symbol (const char *name, const struct block *block0,
5921 domain_enum domain, int *is_a_field_of_this)
5923 struct block_symbol info;
5925 if (is_a_field_of_this != NULL)
5926 *is_a_field_of_this = 0;
5928 ada_lookup_encoded_symbol (ada_encode (ada_fold_name (name)),
5929 block0, domain, &info);
5933 static struct block_symbol
5934 ada_lookup_symbol_nonlocal (const struct language_defn *langdef,
5936 const struct block *block,
5937 const domain_enum domain)
5939 struct block_symbol sym;
5941 sym = ada_lookup_symbol (name, block_static_block (block), domain, NULL);
5942 if (sym.symbol != NULL)
5945 /* If we haven't found a match at this point, try the primitive
5946 types. In other languages, this search is performed before
5947 searching for global symbols in order to short-circuit that
5948 global-symbol search if it happens that the name corresponds
5949 to a primitive type. But we cannot do the same in Ada, because
5950 it is perfectly legitimate for a program to declare a type which
5951 has the same name as a standard type. If looking up a type in
5952 that situation, we have traditionally ignored the primitive type
5953 in favor of user-defined types. This is why, unlike most other
5954 languages, we search the primitive types this late and only after
5955 having searched the global symbols without success. */
5957 if (domain == VAR_DOMAIN)
5959 struct gdbarch *gdbarch;
5962 gdbarch = target_gdbarch ();
5964 gdbarch = block_gdbarch (block);
5965 sym.symbol = language_lookup_primitive_type_as_symbol (langdef, gdbarch, name);
5966 if (sym.symbol != NULL)
5970 return (struct block_symbol) {NULL, NULL};
5974 /* True iff STR is a possible encoded suffix of a normal Ada name
5975 that is to be ignored for matching purposes. Suffixes of parallel
5976 names (e.g., XVE) are not included here. Currently, the possible suffixes
5977 are given by any of the regular expressions:
5979 [.$][0-9]+ [nested subprogram suffix, on platforms such as GNU/Linux]
5980 ___[0-9]+ [nested subprogram suffix, on platforms such as HP/UX]
5981 TKB [subprogram suffix for task bodies]
5982 _E[0-9]+[bs]$ [protected object entry suffixes]
5983 (X[nb]*)?((\$|__)[0-9](_?[0-9]+)|___(JM|LJM|X([FDBUP].*|R[^T]?)))?$
5985 Also, any leading "__[0-9]+" sequence is skipped before the suffix
5986 match is performed. This sequence is used to differentiate homonyms,
5987 is an optional part of a valid name suffix. */
5990 is_name_suffix (const char *str)
5993 const char *matching;
5994 const int len = strlen (str);
5996 /* Skip optional leading __[0-9]+. */
5998 if (len > 3 && str[0] == '_' && str[1] == '_' && isdigit (str[2]))
6001 while (isdigit (str[0]))
6007 if (str[0] == '.' || str[0] == '$')
6010 while (isdigit (matching[0]))
6012 if (matching[0] == '\0')
6018 if (len > 3 && str[0] == '_' && str[1] == '_' && str[2] == '_')
6021 while (isdigit (matching[0]))
6023 if (matching[0] == '\0')
6027 /* "TKB" suffixes are used for subprograms implementing task bodies. */
6029 if (strcmp (str, "TKB") == 0)
6033 /* FIXME: brobecker/2005-09-23: Protected Object subprograms end
6034 with a N at the end. Unfortunately, the compiler uses the same
6035 convention for other internal types it creates. So treating
6036 all entity names that end with an "N" as a name suffix causes
6037 some regressions. For instance, consider the case of an enumerated
6038 type. To support the 'Image attribute, it creates an array whose
6040 Having a single character like this as a suffix carrying some
6041 information is a bit risky. Perhaps we should change the encoding
6042 to be something like "_N" instead. In the meantime, do not do
6043 the following check. */
6044 /* Protected Object Subprograms */
6045 if (len == 1 && str [0] == 'N')
6050 if (len > 3 && str[0] == '_' && str [1] == 'E' && isdigit (str[2]))
6053 while (isdigit (matching[0]))
6055 if ((matching[0] == 'b' || matching[0] == 's')
6056 && matching [1] == '\0')
6060 /* ??? We should not modify STR directly, as we are doing below. This
6061 is fine in this case, but may become problematic later if we find
6062 that this alternative did not work, and want to try matching
6063 another one from the begining of STR. Since we modified it, we
6064 won't be able to find the begining of the string anymore! */
6068 while (str[0] != '_' && str[0] != '\0')
6070 if (str[0] != 'n' && str[0] != 'b')
6076 if (str[0] == '\000')
6081 if (str[1] != '_' || str[2] == '\000')
6085 if (strcmp (str + 3, "JM") == 0)
6087 /* FIXME: brobecker/2004-09-30: GNAT will soon stop using
6088 the LJM suffix in favor of the JM one. But we will
6089 still accept LJM as a valid suffix for a reasonable
6090 amount of time, just to allow ourselves to debug programs
6091 compiled using an older version of GNAT. */
6092 if (strcmp (str + 3, "LJM") == 0)
6096 if (str[4] == 'F' || str[4] == 'D' || str[4] == 'B'
6097 || str[4] == 'U' || str[4] == 'P')
6099 if (str[4] == 'R' && str[5] != 'T')
6103 if (!isdigit (str[2]))
6105 for (k = 3; str[k] != '\0'; k += 1)
6106 if (!isdigit (str[k]) && str[k] != '_')
6110 if (str[0] == '$' && isdigit (str[1]))
6112 for (k = 2; str[k] != '\0'; k += 1)
6113 if (!isdigit (str[k]) && str[k] != '_')
6120 /* Return non-zero if the string starting at NAME and ending before
6121 NAME_END contains no capital letters. */
6124 is_valid_name_for_wild_match (const char *name0)
6126 const char *decoded_name = ada_decode (name0);
6129 /* If the decoded name starts with an angle bracket, it means that
6130 NAME0 does not follow the GNAT encoding format. It should then
6131 not be allowed as a possible wild match. */
6132 if (decoded_name[0] == '<')
6135 for (i=0; decoded_name[i] != '\0'; i++)
6136 if (isalpha (decoded_name[i]) && !islower (decoded_name[i]))
6142 /* Advance *NAMEP to next occurrence of TARGET0 in the string NAME0
6143 that could start a simple name. Assumes that *NAMEP points into
6144 the string beginning at NAME0. */
6147 advance_wild_match (const char **namep, const char *name0, int target0)
6149 const char *name = *namep;
6159 if ((t1 >= 'a' && t1 <= 'z') || (t1 >= '0' && t1 <= '9'))
6162 if (name == name0 + 5 && startswith (name0, "_ada"))
6167 else if (t1 == '_' && ((name[2] >= 'a' && name[2] <= 'z')
6168 || name[2] == target0))
6176 else if ((t0 >= 'a' && t0 <= 'z') || (t0 >= '0' && t0 <= '9'))
6186 /* Return 0 iff NAME encodes a name of the form prefix.PATN. Ignores any
6187 informational suffixes of NAME (i.e., for which is_name_suffix is
6188 true). Assumes that PATN is a lower-cased Ada simple name. */
6191 wild_match (const char *name, const char *patn)
6194 const char *name0 = name;
6198 const char *match = name;
6202 for (name += 1, p = patn + 1; *p != '\0'; name += 1, p += 1)
6205 if (*p == '\0' && is_name_suffix (name))
6206 return match != name0 && !is_valid_name_for_wild_match (name0);
6208 if (name[-1] == '_')
6211 if (!advance_wild_match (&name, name0, *patn))
6216 /* Returns 0 iff symbol name SYM_NAME matches SEARCH_NAME, apart from
6217 informational suffix. */
6220 full_match (const char *sym_name, const char *search_name)
6222 return !match_name (sym_name, search_name, 0);
6226 /* Add symbols from BLOCK matching identifier NAME in DOMAIN to
6227 vector *defn_symbols, updating the list of symbols in OBSTACKP
6228 (if necessary). If WILD, treat as NAME with a wildcard prefix.
6229 OBJFILE is the section containing BLOCK. */
6232 ada_add_block_symbols (struct obstack *obstackp,
6233 const struct block *block, const char *name,
6234 domain_enum domain, struct objfile *objfile,
6237 struct block_iterator iter;
6238 int name_len = strlen (name);
6239 /* A matching argument symbol, if any. */
6240 struct symbol *arg_sym;
6241 /* Set true when we find a matching non-argument symbol. */
6249 for (sym = block_iter_match_first (block, name, wild_match, &iter);
6250 sym != NULL; sym = block_iter_match_next (name, wild_match, &iter))
6252 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
6253 SYMBOL_DOMAIN (sym), domain)
6254 && wild_match (SYMBOL_LINKAGE_NAME (sym), name) == 0)
6256 if (SYMBOL_CLASS (sym) == LOC_UNRESOLVED)
6258 else if (SYMBOL_IS_ARGUMENT (sym))
6263 add_defn_to_vec (obstackp,
6264 fixup_symbol_section (sym, objfile),
6272 for (sym = block_iter_match_first (block, name, full_match, &iter);
6273 sym != NULL; sym = block_iter_match_next (name, full_match, &iter))
6275 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
6276 SYMBOL_DOMAIN (sym), domain))
6278 if (SYMBOL_CLASS (sym) != LOC_UNRESOLVED)
6280 if (SYMBOL_IS_ARGUMENT (sym))
6285 add_defn_to_vec (obstackp,
6286 fixup_symbol_section (sym, objfile),
6294 /* Handle renamings. */
6296 if (ada_add_block_renamings (obstackp, block, name, domain, wild))
6299 if (!found_sym && arg_sym != NULL)
6301 add_defn_to_vec (obstackp,
6302 fixup_symbol_section (arg_sym, objfile),
6311 ALL_BLOCK_SYMBOLS (block, iter, sym)
6313 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
6314 SYMBOL_DOMAIN (sym), domain))
6318 cmp = (int) '_' - (int) SYMBOL_LINKAGE_NAME (sym)[0];
6321 cmp = !startswith (SYMBOL_LINKAGE_NAME (sym), "_ada_");
6323 cmp = strncmp (name, SYMBOL_LINKAGE_NAME (sym) + 5,
6328 && is_name_suffix (SYMBOL_LINKAGE_NAME (sym) + name_len + 5))
6330 if (SYMBOL_CLASS (sym) != LOC_UNRESOLVED)
6332 if (SYMBOL_IS_ARGUMENT (sym))
6337 add_defn_to_vec (obstackp,
6338 fixup_symbol_section (sym, objfile),
6346 /* NOTE: This really shouldn't be needed for _ada_ symbols.
6347 They aren't parameters, right? */
6348 if (!found_sym && arg_sym != NULL)
6350 add_defn_to_vec (obstackp,
6351 fixup_symbol_section (arg_sym, objfile),
6358 /* Symbol Completion */
6360 /* If SYM_NAME is a completion candidate for TEXT, return this symbol
6361 name in a form that's appropriate for the completion. The result
6362 does not need to be deallocated, but is only good until the next call.
6364 TEXT_LEN is equal to the length of TEXT.
6365 Perform a wild match if WILD_MATCH_P is set.
6366 ENCODED_P should be set if TEXT represents the start of a symbol name
6367 in its encoded form. */
6370 symbol_completion_match (const char *sym_name,
6371 const char *text, int text_len,
6372 int wild_match_p, int encoded_p)
6374 const int verbatim_match = (text[0] == '<');
6379 /* Strip the leading angle bracket. */
6384 /* First, test against the fully qualified name of the symbol. */
6386 if (strncmp (sym_name, text, text_len) == 0)
6389 if (match && !encoded_p)
6391 /* One needed check before declaring a positive match is to verify
6392 that iff we are doing a verbatim match, the decoded version
6393 of the symbol name starts with '<'. Otherwise, this symbol name
6394 is not a suitable completion. */
6395 const char *sym_name_copy = sym_name;
6396 int has_angle_bracket;
6398 sym_name = ada_decode (sym_name);
6399 has_angle_bracket = (sym_name[0] == '<');
6400 match = (has_angle_bracket == verbatim_match);
6401 sym_name = sym_name_copy;
6404 if (match && !verbatim_match)
6406 /* When doing non-verbatim match, another check that needs to
6407 be done is to verify that the potentially matching symbol name
6408 does not include capital letters, because the ada-mode would
6409 not be able to understand these symbol names without the
6410 angle bracket notation. */
6413 for (tmp = sym_name; *tmp != '\0' && !isupper (*tmp); tmp++);
6418 /* Second: Try wild matching... */
6420 if (!match && wild_match_p)
6422 /* Since we are doing wild matching, this means that TEXT
6423 may represent an unqualified symbol name. We therefore must
6424 also compare TEXT against the unqualified name of the symbol. */
6425 sym_name = ada_unqualified_name (ada_decode (sym_name));
6427 if (strncmp (sym_name, text, text_len) == 0)
6431 /* Finally: If we found a mach, prepare the result to return. */
6437 sym_name = add_angle_brackets (sym_name);
6440 sym_name = ada_decode (sym_name);
6445 /* A companion function to ada_make_symbol_completion_list().
6446 Check if SYM_NAME represents a symbol which name would be suitable
6447 to complete TEXT (TEXT_LEN is the length of TEXT), in which case
6448 it is appended at the end of the given string vector SV.
6450 ORIG_TEXT is the string original string from the user command
6451 that needs to be completed. WORD is the entire command on which
6452 completion should be performed. These two parameters are used to
6453 determine which part of the symbol name should be added to the
6455 if WILD_MATCH_P is set, then wild matching is performed.
6456 ENCODED_P should be set if TEXT represents a symbol name in its
6457 encoded formed (in which case the completion should also be
6461 symbol_completion_add (VEC(char_ptr) **sv,
6462 const char *sym_name,
6463 const char *text, int text_len,
6464 const char *orig_text, const char *word,
6465 int wild_match_p, int encoded_p)
6467 const char *match = symbol_completion_match (sym_name, text, text_len,
6468 wild_match_p, encoded_p);
6474 /* We found a match, so add the appropriate completion to the given
6477 if (word == orig_text)
6479 completion = (char *) xmalloc (strlen (match) + 5);
6480 strcpy (completion, match);
6482 else if (word > orig_text)
6484 /* Return some portion of sym_name. */
6485 completion = (char *) xmalloc (strlen (match) + 5);
6486 strcpy (completion, match + (word - orig_text));
6490 /* Return some of ORIG_TEXT plus sym_name. */
6491 completion = (char *) xmalloc (strlen (match) + (orig_text - word) + 5);
6492 strncpy (completion, word, orig_text - word);
6493 completion[orig_text - word] = '\0';
6494 strcat (completion, match);
6497 VEC_safe_push (char_ptr, *sv, completion);
6500 /* An object of this type is passed as the user_data argument to the
6501 expand_symtabs_matching method. */
6502 struct add_partial_datum
6504 VEC(char_ptr) **completions;
6513 /* A callback for expand_symtabs_matching. */
6516 ada_complete_symbol_matcher (const char *name, void *user_data)
6518 struct add_partial_datum *data = (struct add_partial_datum *) user_data;
6520 return symbol_completion_match (name, data->text, data->text_len,
6521 data->wild_match, data->encoded) != NULL;
6524 /* Return a list of possible symbol names completing TEXT0. WORD is
6525 the entire command on which completion is made. */
6527 static VEC (char_ptr) *
6528 ada_make_symbol_completion_list (const char *text0, const char *word,
6529 enum type_code code)
6535 VEC(char_ptr) *completions = VEC_alloc (char_ptr, 128);
6537 struct compunit_symtab *s;
6538 struct minimal_symbol *msymbol;
6539 struct objfile *objfile;
6540 const struct block *b, *surrounding_static_block = 0;
6542 struct block_iterator iter;
6543 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
6545 gdb_assert (code == TYPE_CODE_UNDEF);
6547 if (text0[0] == '<')
6549 text = xstrdup (text0);
6550 make_cleanup (xfree, text);
6551 text_len = strlen (text);
6557 text = xstrdup (ada_encode (text0));
6558 make_cleanup (xfree, text);
6559 text_len = strlen (text);
6560 for (i = 0; i < text_len; i++)
6561 text[i] = tolower (text[i]);
6563 encoded_p = (strstr (text0, "__") != NULL);
6564 /* If the name contains a ".", then the user is entering a fully
6565 qualified entity name, and the match must not be done in wild
6566 mode. Similarly, if the user wants to complete what looks like
6567 an encoded name, the match must not be done in wild mode. */
6568 wild_match_p = (strchr (text0, '.') == NULL && !encoded_p);
6571 /* First, look at the partial symtab symbols. */
6573 struct add_partial_datum data;
6575 data.completions = &completions;
6577 data.text_len = text_len;
6580 data.wild_match = wild_match_p;
6581 data.encoded = encoded_p;
6582 expand_symtabs_matching (NULL, ada_complete_symbol_matcher, NULL,
6586 /* At this point scan through the misc symbol vectors and add each
6587 symbol you find to the list. Eventually we want to ignore
6588 anything that isn't a text symbol (everything else will be
6589 handled by the psymtab code above). */
6591 ALL_MSYMBOLS (objfile, msymbol)
6594 symbol_completion_add (&completions, MSYMBOL_LINKAGE_NAME (msymbol),
6595 text, text_len, text0, word, wild_match_p,
6599 /* Search upwards from currently selected frame (so that we can
6600 complete on local vars. */
6602 for (b = get_selected_block (0); b != NULL; b = BLOCK_SUPERBLOCK (b))
6604 if (!BLOCK_SUPERBLOCK (b))
6605 surrounding_static_block = b; /* For elmin of dups */
6607 ALL_BLOCK_SYMBOLS (b, iter, sym)
6609 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
6610 text, text_len, text0, word,
6611 wild_match_p, encoded_p);
6615 /* Go through the symtabs and check the externs and statics for
6616 symbols which match. */
6618 ALL_COMPUNITS (objfile, s)
6621 b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (s), GLOBAL_BLOCK);
6622 ALL_BLOCK_SYMBOLS (b, iter, sym)
6624 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
6625 text, text_len, text0, word,
6626 wild_match_p, encoded_p);
6630 ALL_COMPUNITS (objfile, s)
6633 b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (s), STATIC_BLOCK);
6634 /* Don't do this block twice. */
6635 if (b == surrounding_static_block)
6637 ALL_BLOCK_SYMBOLS (b, iter, sym)
6639 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
6640 text, text_len, text0, word,
6641 wild_match_p, encoded_p);
6645 do_cleanups (old_chain);
6651 /* Return non-zero if TYPE is a pointer to the GNAT dispatch table used
6652 for tagged types. */
6655 ada_is_dispatch_table_ptr_type (struct type *type)
6659 if (TYPE_CODE (type) != TYPE_CODE_PTR)
6662 name = TYPE_NAME (TYPE_TARGET_TYPE (type));
6666 return (strcmp (name, "ada__tags__dispatch_table") == 0);
6669 /* Return non-zero if TYPE is an interface tag. */
6672 ada_is_interface_tag (struct type *type)
6674 const char *name = TYPE_NAME (type);
6679 return (strcmp (name, "ada__tags__interface_tag") == 0);
6682 /* True if field number FIELD_NUM in struct or union type TYPE is supposed
6683 to be invisible to users. */
6686 ada_is_ignored_field (struct type *type, int field_num)
6688 if (field_num < 0 || field_num > TYPE_NFIELDS (type))
6691 /* Check the name of that field. */
6693 const char *name = TYPE_FIELD_NAME (type, field_num);
6695 /* Anonymous field names should not be printed.
6696 brobecker/2007-02-20: I don't think this can actually happen
6697 but we don't want to print the value of annonymous fields anyway. */
6701 /* Normally, fields whose name start with an underscore ("_")
6702 are fields that have been internally generated by the compiler,
6703 and thus should not be printed. The "_parent" field is special,
6704 however: This is a field internally generated by the compiler
6705 for tagged types, and it contains the components inherited from
6706 the parent type. This field should not be printed as is, but
6707 should not be ignored either. */
6708 if (name[0] == '_' && !startswith (name, "_parent"))
6712 /* If this is the dispatch table of a tagged type or an interface tag,
6714 if (ada_is_tagged_type (type, 1)
6715 && (ada_is_dispatch_table_ptr_type (TYPE_FIELD_TYPE (type, field_num))
6716 || ada_is_interface_tag (TYPE_FIELD_TYPE (type, field_num))))
6719 /* Not a special field, so it should not be ignored. */
6723 /* True iff TYPE has a tag field. If REFOK, then TYPE may also be a
6724 pointer or reference type whose ultimate target has a tag field. */
6727 ada_is_tagged_type (struct type *type, int refok)
6729 return (ada_lookup_struct_elt_type (type, "_tag", refok, 1, NULL) != NULL);
6732 /* True iff TYPE represents the type of X'Tag */
6735 ada_is_tag_type (struct type *type)
6737 type = ada_check_typedef (type);
6739 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_PTR)
6743 const char *name = ada_type_name (TYPE_TARGET_TYPE (type));
6745 return (name != NULL
6746 && strcmp (name, "ada__tags__dispatch_table") == 0);
6750 /* The type of the tag on VAL. */
6753 ada_tag_type (struct value *val)
6755 return ada_lookup_struct_elt_type (value_type (val), "_tag", 1, 0, NULL);
6758 /* Return 1 if TAG follows the old scheme for Ada tags (used for Ada 95,
6759 retired at Ada 05). */
6762 is_ada95_tag (struct value *tag)
6764 return ada_value_struct_elt (tag, "tsd", 1) != NULL;
6767 /* The value of the tag on VAL. */
6770 ada_value_tag (struct value *val)
6772 return ada_value_struct_elt (val, "_tag", 0);
6775 /* The value of the tag on the object of type TYPE whose contents are
6776 saved at VALADDR, if it is non-null, or is at memory address
6779 static struct value *
6780 value_tag_from_contents_and_address (struct type *type,
6781 const gdb_byte *valaddr,
6784 int tag_byte_offset;
6785 struct type *tag_type;
6787 if (find_struct_field ("_tag", type, 0, &tag_type, &tag_byte_offset,
6790 const gdb_byte *valaddr1 = ((valaddr == NULL)
6792 : valaddr + tag_byte_offset);
6793 CORE_ADDR address1 = (address == 0) ? 0 : address + tag_byte_offset;
6795 return value_from_contents_and_address (tag_type, valaddr1, address1);
6800 static struct type *
6801 type_from_tag (struct value *tag)
6803 const char *type_name = ada_tag_name (tag);
6805 if (type_name != NULL)
6806 return ada_find_any_type (ada_encode (type_name));
6810 /* Given a value OBJ of a tagged type, return a value of this
6811 type at the base address of the object. The base address, as
6812 defined in Ada.Tags, it is the address of the primary tag of
6813 the object, and therefore where the field values of its full
6814 view can be fetched. */
6817 ada_tag_value_at_base_address (struct value *obj)
6820 LONGEST offset_to_top = 0;
6821 struct type *ptr_type, *obj_type;
6823 CORE_ADDR base_address;
6825 obj_type = value_type (obj);
6827 /* It is the responsability of the caller to deref pointers. */
6829 if (TYPE_CODE (obj_type) == TYPE_CODE_PTR
6830 || TYPE_CODE (obj_type) == TYPE_CODE_REF)
6833 tag = ada_value_tag (obj);
6837 /* Base addresses only appeared with Ada 05 and multiple inheritance. */
6839 if (is_ada95_tag (tag))
6842 ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr;
6843 ptr_type = lookup_pointer_type (ptr_type);
6844 val = value_cast (ptr_type, tag);
6848 /* It is perfectly possible that an exception be raised while
6849 trying to determine the base address, just like for the tag;
6850 see ada_tag_name for more details. We do not print the error
6851 message for the same reason. */
6855 offset_to_top = value_as_long (value_ind (value_ptradd (val, -2)));
6858 CATCH (e, RETURN_MASK_ERROR)
6864 /* If offset is null, nothing to do. */
6866 if (offset_to_top == 0)
6869 /* -1 is a special case in Ada.Tags; however, what should be done
6870 is not quite clear from the documentation. So do nothing for
6873 if (offset_to_top == -1)
6876 base_address = value_address (obj) - offset_to_top;
6877 tag = value_tag_from_contents_and_address (obj_type, NULL, base_address);
6879 /* Make sure that we have a proper tag at the new address.
6880 Otherwise, offset_to_top is bogus (which can happen when
6881 the object is not initialized yet). */
6886 obj_type = type_from_tag (tag);
6891 return value_from_contents_and_address (obj_type, NULL, base_address);
6894 /* Return the "ada__tags__type_specific_data" type. */
6896 static struct type *
6897 ada_get_tsd_type (struct inferior *inf)
6899 struct ada_inferior_data *data = get_ada_inferior_data (inf);
6901 if (data->tsd_type == 0)
6902 data->tsd_type = ada_find_any_type ("ada__tags__type_specific_data");
6903 return data->tsd_type;
6906 /* Return the TSD (type-specific data) associated to the given TAG.
6907 TAG is assumed to be the tag of a tagged-type entity.
6909 May return NULL if we are unable to get the TSD. */
6911 static struct value *
6912 ada_get_tsd_from_tag (struct value *tag)
6917 /* First option: The TSD is simply stored as a field of our TAG.
6918 Only older versions of GNAT would use this format, but we have
6919 to test it first, because there are no visible markers for
6920 the current approach except the absence of that field. */
6922 val = ada_value_struct_elt (tag, "tsd", 1);
6926 /* Try the second representation for the dispatch table (in which
6927 there is no explicit 'tsd' field in the referent of the tag pointer,
6928 and instead the tsd pointer is stored just before the dispatch
6931 type = ada_get_tsd_type (current_inferior());
6934 type = lookup_pointer_type (lookup_pointer_type (type));
6935 val = value_cast (type, tag);
6938 return value_ind (value_ptradd (val, -1));
6941 /* Given the TSD of a tag (type-specific data), return a string
6942 containing the name of the associated type.
6944 The returned value is good until the next call. May return NULL
6945 if we are unable to determine the tag name. */
6948 ada_tag_name_from_tsd (struct value *tsd)
6950 static char name[1024];
6954 val = ada_value_struct_elt (tsd, "expanded_name", 1);
6957 read_memory_string (value_as_address (val), name, sizeof (name) - 1);
6958 for (p = name; *p != '\0'; p += 1)
6964 /* The type name of the dynamic type denoted by the 'tag value TAG, as
6967 Return NULL if the TAG is not an Ada tag, or if we were unable to
6968 determine the name of that tag. The result is good until the next
6972 ada_tag_name (struct value *tag)
6976 if (!ada_is_tag_type (value_type (tag)))
6979 /* It is perfectly possible that an exception be raised while trying
6980 to determine the TAG's name, even under normal circumstances:
6981 The associated variable may be uninitialized or corrupted, for
6982 instance. We do not let any exception propagate past this point.
6983 instead we return NULL.
6985 We also do not print the error message either (which often is very
6986 low-level (Eg: "Cannot read memory at 0x[...]"), but instead let
6987 the caller print a more meaningful message if necessary. */
6990 struct value *tsd = ada_get_tsd_from_tag (tag);
6993 name = ada_tag_name_from_tsd (tsd);
6995 CATCH (e, RETURN_MASK_ERROR)
7003 /* The parent type of TYPE, or NULL if none. */
7006 ada_parent_type (struct type *type)
7010 type = ada_check_typedef (type);
7012 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_STRUCT)
7015 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
7016 if (ada_is_parent_field (type, i))
7018 struct type *parent_type = TYPE_FIELD_TYPE (type, i);
7020 /* If the _parent field is a pointer, then dereference it. */
7021 if (TYPE_CODE (parent_type) == TYPE_CODE_PTR)
7022 parent_type = TYPE_TARGET_TYPE (parent_type);
7023 /* If there is a parallel XVS type, get the actual base type. */
7024 parent_type = ada_get_base_type (parent_type);
7026 return ada_check_typedef (parent_type);
7032 /* True iff field number FIELD_NUM of structure type TYPE contains the
7033 parent-type (inherited) fields of a derived type. Assumes TYPE is
7034 a structure type with at least FIELD_NUM+1 fields. */
7037 ada_is_parent_field (struct type *type, int field_num)
7039 const char *name = TYPE_FIELD_NAME (ada_check_typedef (type), field_num);
7041 return (name != NULL
7042 && (startswith (name, "PARENT")
7043 || startswith (name, "_parent")));
7046 /* True iff field number FIELD_NUM of structure type TYPE is a
7047 transparent wrapper field (which should be silently traversed when doing
7048 field selection and flattened when printing). Assumes TYPE is a
7049 structure type with at least FIELD_NUM+1 fields. Such fields are always
7053 ada_is_wrapper_field (struct type *type, int field_num)
7055 const char *name = TYPE_FIELD_NAME (type, field_num);
7057 if (name != NULL && strcmp (name, "RETVAL") == 0)
7059 /* This happens in functions with "out" or "in out" parameters
7060 which are passed by copy. For such functions, GNAT describes
7061 the function's return type as being a struct where the return
7062 value is in a field called RETVAL, and where the other "out"
7063 or "in out" parameters are fields of that struct. This is not
7068 return (name != NULL
7069 && (startswith (name, "PARENT")
7070 || strcmp (name, "REP") == 0
7071 || startswith (name, "_parent")
7072 || name[0] == 'S' || name[0] == 'R' || name[0] == 'O'));
7075 /* True iff field number FIELD_NUM of structure or union type TYPE
7076 is a variant wrapper. Assumes TYPE is a structure type with at least
7077 FIELD_NUM+1 fields. */
7080 ada_is_variant_part (struct type *type, int field_num)
7082 struct type *field_type = TYPE_FIELD_TYPE (type, field_num);
7084 return (TYPE_CODE (field_type) == TYPE_CODE_UNION
7085 || (is_dynamic_field (type, field_num)
7086 && (TYPE_CODE (TYPE_TARGET_TYPE (field_type))
7087 == TYPE_CODE_UNION)));
7090 /* Assuming that VAR_TYPE is a variant wrapper (type of the variant part)
7091 whose discriminants are contained in the record type OUTER_TYPE,
7092 returns the type of the controlling discriminant for the variant.
7093 May return NULL if the type could not be found. */
7096 ada_variant_discrim_type (struct type *var_type, struct type *outer_type)
7098 char *name = ada_variant_discrim_name (var_type);
7100 return ada_lookup_struct_elt_type (outer_type, name, 1, 1, NULL);
7103 /* Assuming that TYPE is the type of a variant wrapper, and FIELD_NUM is a
7104 valid field number within it, returns 1 iff field FIELD_NUM of TYPE
7105 represents a 'when others' clause; otherwise 0. */
7108 ada_is_others_clause (struct type *type, int field_num)
7110 const char *name = TYPE_FIELD_NAME (type, field_num);
7112 return (name != NULL && name[0] == 'O');
7115 /* Assuming that TYPE0 is the type of the variant part of a record,
7116 returns the name of the discriminant controlling the variant.
7117 The value is valid until the next call to ada_variant_discrim_name. */
7120 ada_variant_discrim_name (struct type *type0)
7122 static char *result = NULL;
7123 static size_t result_len = 0;
7126 const char *discrim_end;
7127 const char *discrim_start;
7129 if (TYPE_CODE (type0) == TYPE_CODE_PTR)
7130 type = TYPE_TARGET_TYPE (type0);
7134 name = ada_type_name (type);
7136 if (name == NULL || name[0] == '\000')
7139 for (discrim_end = name + strlen (name) - 6; discrim_end != name;
7142 if (startswith (discrim_end, "___XVN"))
7145 if (discrim_end == name)
7148 for (discrim_start = discrim_end; discrim_start != name + 3;
7151 if (discrim_start == name + 1)
7153 if ((discrim_start > name + 3
7154 && startswith (discrim_start - 3, "___"))
7155 || discrim_start[-1] == '.')
7159 GROW_VECT (result, result_len, discrim_end - discrim_start + 1);
7160 strncpy (result, discrim_start, discrim_end - discrim_start);
7161 result[discrim_end - discrim_start] = '\0';
7165 /* Scan STR for a subtype-encoded number, beginning at position K.
7166 Put the position of the character just past the number scanned in
7167 *NEW_K, if NEW_K!=NULL. Put the scanned number in *R, if R!=NULL.
7168 Return 1 if there was a valid number at the given position, and 0
7169 otherwise. A "subtype-encoded" number consists of the absolute value
7170 in decimal, followed by the letter 'm' to indicate a negative number.
7171 Assumes 0m does not occur. */
7174 ada_scan_number (const char str[], int k, LONGEST * R, int *new_k)
7178 if (!isdigit (str[k]))
7181 /* Do it the hard way so as not to make any assumption about
7182 the relationship of unsigned long (%lu scan format code) and
7185 while (isdigit (str[k]))
7187 RU = RU * 10 + (str[k] - '0');
7194 *R = (-(LONGEST) (RU - 1)) - 1;
7200 /* NOTE on the above: Technically, C does not say what the results of
7201 - (LONGEST) RU or (LONGEST) -RU are for RU == largest positive
7202 number representable as a LONGEST (although either would probably work
7203 in most implementations). When RU>0, the locution in the then branch
7204 above is always equivalent to the negative of RU. */
7211 /* Assuming that TYPE is a variant part wrapper type (a VARIANTS field),
7212 and FIELD_NUM is a valid field number within it, returns 1 iff VAL is
7213 in the range encoded by field FIELD_NUM of TYPE; otherwise 0. */
7216 ada_in_variant (LONGEST val, struct type *type, int field_num)
7218 const char *name = TYPE_FIELD_NAME (type, field_num);
7232 if (!ada_scan_number (name, p + 1, &W, &p))
7242 if (!ada_scan_number (name, p + 1, &L, &p)
7243 || name[p] != 'T' || !ada_scan_number (name, p + 1, &U, &p))
7245 if (val >= L && val <= U)
7257 /* FIXME: Lots of redundancy below. Try to consolidate. */
7259 /* Given a value ARG1 (offset by OFFSET bytes) of a struct or union type
7260 ARG_TYPE, extract and return the value of one of its (non-static)
7261 fields. FIELDNO says which field. Differs from value_primitive_field
7262 only in that it can handle packed values of arbitrary type. */
7264 static struct value *
7265 ada_value_primitive_field (struct value *arg1, int offset, int fieldno,
7266 struct type *arg_type)
7270 arg_type = ada_check_typedef (arg_type);
7271 type = TYPE_FIELD_TYPE (arg_type, fieldno);
7273 /* Handle packed fields. */
7275 if (TYPE_FIELD_BITSIZE (arg_type, fieldno) != 0)
7277 int bit_pos = TYPE_FIELD_BITPOS (arg_type, fieldno);
7278 int bit_size = TYPE_FIELD_BITSIZE (arg_type, fieldno);
7280 return ada_value_primitive_packed_val (arg1, value_contents (arg1),
7281 offset + bit_pos / 8,
7282 bit_pos % 8, bit_size, type);
7285 return value_primitive_field (arg1, offset, fieldno, arg_type);
7288 /* Find field with name NAME in object of type TYPE. If found,
7289 set the following for each argument that is non-null:
7290 - *FIELD_TYPE_P to the field's type;
7291 - *BYTE_OFFSET_P to OFFSET + the byte offset of the field within
7292 an object of that type;
7293 - *BIT_OFFSET_P to the bit offset modulo byte size of the field;
7294 - *BIT_SIZE_P to its size in bits if the field is packed, and
7296 If INDEX_P is non-null, increment *INDEX_P by the number of source-visible
7297 fields up to but not including the desired field, or by the total
7298 number of fields if not found. A NULL value of NAME never
7299 matches; the function just counts visible fields in this case.
7301 Returns 1 if found, 0 otherwise. */
7304 find_struct_field (const char *name, struct type *type, int offset,
7305 struct type **field_type_p,
7306 int *byte_offset_p, int *bit_offset_p, int *bit_size_p,
7311 type = ada_check_typedef (type);
7313 if (field_type_p != NULL)
7314 *field_type_p = NULL;
7315 if (byte_offset_p != NULL)
7317 if (bit_offset_p != NULL)
7319 if (bit_size_p != NULL)
7322 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
7324 int bit_pos = TYPE_FIELD_BITPOS (type, i);
7325 int fld_offset = offset + bit_pos / 8;
7326 const char *t_field_name = TYPE_FIELD_NAME (type, i);
7328 if (t_field_name == NULL)
7331 else if (name != NULL && field_name_match (t_field_name, name))
7333 int bit_size = TYPE_FIELD_BITSIZE (type, i);
7335 if (field_type_p != NULL)
7336 *field_type_p = TYPE_FIELD_TYPE (type, i);
7337 if (byte_offset_p != NULL)
7338 *byte_offset_p = fld_offset;
7339 if (bit_offset_p != NULL)
7340 *bit_offset_p = bit_pos % 8;
7341 if (bit_size_p != NULL)
7342 *bit_size_p = bit_size;
7345 else if (ada_is_wrapper_field (type, i))
7347 if (find_struct_field (name, TYPE_FIELD_TYPE (type, i), fld_offset,
7348 field_type_p, byte_offset_p, bit_offset_p,
7349 bit_size_p, index_p))
7352 else if (ada_is_variant_part (type, i))
7354 /* PNH: Wait. Do we ever execute this section, or is ARG always of
7357 struct type *field_type
7358 = ada_check_typedef (TYPE_FIELD_TYPE (type, i));
7360 for (j = 0; j < TYPE_NFIELDS (field_type); j += 1)
7362 if (find_struct_field (name, TYPE_FIELD_TYPE (field_type, j),
7364 + TYPE_FIELD_BITPOS (field_type, j) / 8,
7365 field_type_p, byte_offset_p,
7366 bit_offset_p, bit_size_p, index_p))
7370 else if (index_p != NULL)
7376 /* Number of user-visible fields in record type TYPE. */
7379 num_visible_fields (struct type *type)
7384 find_struct_field (NULL, type, 0, NULL, NULL, NULL, NULL, &n);
7388 /* Look for a field NAME in ARG. Adjust the address of ARG by OFFSET bytes,
7389 and search in it assuming it has (class) type TYPE.
7390 If found, return value, else return NULL.
7392 Searches recursively through wrapper fields (e.g., '_parent'). */
7394 static struct value *
7395 ada_search_struct_field (const char *name, struct value *arg, int offset,
7400 type = ada_check_typedef (type);
7401 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
7403 const char *t_field_name = TYPE_FIELD_NAME (type, i);
7405 if (t_field_name == NULL)
7408 else if (field_name_match (t_field_name, name))
7409 return ada_value_primitive_field (arg, offset, i, type);
7411 else if (ada_is_wrapper_field (type, i))
7413 struct value *v = /* Do not let indent join lines here. */
7414 ada_search_struct_field (name, arg,
7415 offset + TYPE_FIELD_BITPOS (type, i) / 8,
7416 TYPE_FIELD_TYPE (type, i));
7422 else if (ada_is_variant_part (type, i))
7424 /* PNH: Do we ever get here? See find_struct_field. */
7426 struct type *field_type = ada_check_typedef (TYPE_FIELD_TYPE (type,
7428 int var_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8;
7430 for (j = 0; j < TYPE_NFIELDS (field_type); j += 1)
7432 struct value *v = ada_search_struct_field /* Force line
7435 var_offset + TYPE_FIELD_BITPOS (field_type, j) / 8,
7436 TYPE_FIELD_TYPE (field_type, j));
7446 static struct value *ada_index_struct_field_1 (int *, struct value *,
7447 int, struct type *);
7450 /* Return field #INDEX in ARG, where the index is that returned by
7451 * find_struct_field through its INDEX_P argument. Adjust the address
7452 * of ARG by OFFSET bytes, and search in it assuming it has (class) type TYPE.
7453 * If found, return value, else return NULL. */
7455 static struct value *
7456 ada_index_struct_field (int index, struct value *arg, int offset,
7459 return ada_index_struct_field_1 (&index, arg, offset, type);
7463 /* Auxiliary function for ada_index_struct_field. Like
7464 * ada_index_struct_field, but takes index from *INDEX_P and modifies
7467 static struct value *
7468 ada_index_struct_field_1 (int *index_p, struct value *arg, int offset,
7472 type = ada_check_typedef (type);
7474 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
7476 if (TYPE_FIELD_NAME (type, i) == NULL)
7478 else if (ada_is_wrapper_field (type, i))
7480 struct value *v = /* Do not let indent join lines here. */
7481 ada_index_struct_field_1 (index_p, arg,
7482 offset + TYPE_FIELD_BITPOS (type, i) / 8,
7483 TYPE_FIELD_TYPE (type, i));
7489 else if (ada_is_variant_part (type, i))
7491 /* PNH: Do we ever get here? See ada_search_struct_field,
7492 find_struct_field. */
7493 error (_("Cannot assign this kind of variant record"));
7495 else if (*index_p == 0)
7496 return ada_value_primitive_field (arg, offset, i, type);
7503 /* Given ARG, a value of type (pointer or reference to a)*
7504 structure/union, extract the component named NAME from the ultimate
7505 target structure/union and return it as a value with its
7508 The routine searches for NAME among all members of the structure itself
7509 and (recursively) among all members of any wrapper members
7512 If NO_ERR, then simply return NULL in case of error, rather than
7516 ada_value_struct_elt (struct value *arg, char *name, int no_err)
7518 struct type *t, *t1;
7522 t1 = t = ada_check_typedef (value_type (arg));
7523 if (TYPE_CODE (t) == TYPE_CODE_REF)
7525 t1 = TYPE_TARGET_TYPE (t);
7528 t1 = ada_check_typedef (t1);
7529 if (TYPE_CODE (t1) == TYPE_CODE_PTR)
7531 arg = coerce_ref (arg);
7536 while (TYPE_CODE (t) == TYPE_CODE_PTR)
7538 t1 = TYPE_TARGET_TYPE (t);
7541 t1 = ada_check_typedef (t1);
7542 if (TYPE_CODE (t1) == TYPE_CODE_PTR)
7544 arg = value_ind (arg);
7551 if (TYPE_CODE (t1) != TYPE_CODE_STRUCT && TYPE_CODE (t1) != TYPE_CODE_UNION)
7555 v = ada_search_struct_field (name, arg, 0, t);
7558 int bit_offset, bit_size, byte_offset;
7559 struct type *field_type;
7562 if (TYPE_CODE (t) == TYPE_CODE_PTR)
7563 address = value_address (ada_value_ind (arg));
7565 address = value_address (ada_coerce_ref (arg));
7567 t1 = ada_to_fixed_type (ada_get_base_type (t1), NULL, address, NULL, 1);
7568 if (find_struct_field (name, t1, 0,
7569 &field_type, &byte_offset, &bit_offset,
7574 if (TYPE_CODE (t) == TYPE_CODE_REF)
7575 arg = ada_coerce_ref (arg);
7577 arg = ada_value_ind (arg);
7578 v = ada_value_primitive_packed_val (arg, NULL, byte_offset,
7579 bit_offset, bit_size,
7583 v = value_at_lazy (field_type, address + byte_offset);
7587 if (v != NULL || no_err)
7590 error (_("There is no member named %s."), name);
7596 error (_("Attempt to extract a component of "
7597 "a value that is not a record."));
7600 /* Return a string representation of type TYPE. */
7603 type_as_string (struct type *type)
7605 struct ui_file *tmp_stream = mem_fileopen ();
7606 struct cleanup *old_chain;
7608 tmp_stream = mem_fileopen ();
7609 old_chain = make_cleanup_ui_file_delete (tmp_stream);
7611 type_print (type, "", tmp_stream, -1);
7612 std::string str = ui_file_as_string (tmp_stream);
7614 do_cleanups (old_chain);
7618 /* Given a type TYPE, look up the type of the component of type named NAME.
7619 If DISPP is non-null, add its byte displacement from the beginning of a
7620 structure (pointed to by a value) of type TYPE to *DISPP (does not
7621 work for packed fields).
7623 Matches any field whose name has NAME as a prefix, possibly
7626 TYPE can be either a struct or union. If REFOK, TYPE may also
7627 be a (pointer or reference)+ to a struct or union, and the
7628 ultimate target type will be searched.
7630 Looks recursively into variant clauses and parent types.
7632 If NOERR is nonzero, return NULL if NAME is not suitably defined or
7633 TYPE is not a type of the right kind. */
7635 static struct type *
7636 ada_lookup_struct_elt_type (struct type *type, char *name, int refok,
7637 int noerr, int *dispp)
7644 if (refok && type != NULL)
7647 type = ada_check_typedef (type);
7648 if (TYPE_CODE (type) != TYPE_CODE_PTR
7649 && TYPE_CODE (type) != TYPE_CODE_REF)
7651 type = TYPE_TARGET_TYPE (type);
7655 || (TYPE_CODE (type) != TYPE_CODE_STRUCT
7656 && TYPE_CODE (type) != TYPE_CODE_UNION))
7661 error (_("Type %s is not a structure or union type"),
7662 type != NULL ? type_as_string (type).c_str () : _("(null)"));
7665 type = to_static_fixed_type (type);
7667 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
7669 const char *t_field_name = TYPE_FIELD_NAME (type, i);
7673 if (t_field_name == NULL)
7676 else if (field_name_match (t_field_name, name))
7679 *dispp += TYPE_FIELD_BITPOS (type, i) / 8;
7680 return TYPE_FIELD_TYPE (type, i);
7683 else if (ada_is_wrapper_field (type, i))
7686 t = ada_lookup_struct_elt_type (TYPE_FIELD_TYPE (type, i), name,
7691 *dispp += disp + TYPE_FIELD_BITPOS (type, i) / 8;
7696 else if (ada_is_variant_part (type, i))
7699 struct type *field_type = ada_check_typedef (TYPE_FIELD_TYPE (type,
7702 for (j = TYPE_NFIELDS (field_type) - 1; j >= 0; j -= 1)
7704 /* FIXME pnh 2008/01/26: We check for a field that is
7705 NOT wrapped in a struct, since the compiler sometimes
7706 generates these for unchecked variant types. Revisit
7707 if the compiler changes this practice. */
7708 const char *v_field_name = TYPE_FIELD_NAME (field_type, j);
7710 if (v_field_name != NULL
7711 && field_name_match (v_field_name, name))
7712 t = TYPE_FIELD_TYPE (field_type, j);
7714 t = ada_lookup_struct_elt_type (TYPE_FIELD_TYPE (field_type,
7721 *dispp += disp + TYPE_FIELD_BITPOS (type, i) / 8;
7732 const char *name_str = name != NULL ? name : _("<null>");
7734 error (_("Type %s has no component named %s"),
7735 type_as_string (type).c_str (), name_str);
7741 /* Assuming that VAR_TYPE is the type of a variant part of a record (a union),
7742 within a value of type OUTER_TYPE, return true iff VAR_TYPE
7743 represents an unchecked union (that is, the variant part of a
7744 record that is named in an Unchecked_Union pragma). */
7747 is_unchecked_variant (struct type *var_type, struct type *outer_type)
7749 char *discrim_name = ada_variant_discrim_name (var_type);
7751 return (ada_lookup_struct_elt_type (outer_type, discrim_name, 0, 1, NULL)
7756 /* Assuming that VAR_TYPE is the type of a variant part of a record (a union),
7757 within a value of type OUTER_TYPE that is stored in GDB at
7758 OUTER_VALADDR, determine which variant clause (field number in VAR_TYPE,
7759 numbering from 0) is applicable. Returns -1 if none are. */
7762 ada_which_variant_applies (struct type *var_type, struct type *outer_type,
7763 const gdb_byte *outer_valaddr)
7767 char *discrim_name = ada_variant_discrim_name (var_type);
7768 struct value *outer;
7769 struct value *discrim;
7770 LONGEST discrim_val;
7772 /* Using plain value_from_contents_and_address here causes problems
7773 because we will end up trying to resolve a type that is currently
7774 being constructed. */
7775 outer = value_from_contents_and_address_unresolved (outer_type,
7777 discrim = ada_value_struct_elt (outer, discrim_name, 1);
7778 if (discrim == NULL)
7780 discrim_val = value_as_long (discrim);
7783 for (i = 0; i < TYPE_NFIELDS (var_type); i += 1)
7785 if (ada_is_others_clause (var_type, i))
7787 else if (ada_in_variant (discrim_val, var_type, i))
7791 return others_clause;
7796 /* Dynamic-Sized Records */
7798 /* Strategy: The type ostensibly attached to a value with dynamic size
7799 (i.e., a size that is not statically recorded in the debugging
7800 data) does not accurately reflect the size or layout of the value.
7801 Our strategy is to convert these values to values with accurate,
7802 conventional types that are constructed on the fly. */
7804 /* There is a subtle and tricky problem here. In general, we cannot
7805 determine the size of dynamic records without its data. However,
7806 the 'struct value' data structure, which GDB uses to represent
7807 quantities in the inferior process (the target), requires the size
7808 of the type at the time of its allocation in order to reserve space
7809 for GDB's internal copy of the data. That's why the
7810 'to_fixed_xxx_type' routines take (target) addresses as parameters,
7811 rather than struct value*s.
7813 However, GDB's internal history variables ($1, $2, etc.) are
7814 struct value*s containing internal copies of the data that are not, in
7815 general, the same as the data at their corresponding addresses in
7816 the target. Fortunately, the types we give to these values are all
7817 conventional, fixed-size types (as per the strategy described
7818 above), so that we don't usually have to perform the
7819 'to_fixed_xxx_type' conversions to look at their values.
7820 Unfortunately, there is one exception: if one of the internal
7821 history variables is an array whose elements are unconstrained
7822 records, then we will need to create distinct fixed types for each
7823 element selected. */
7825 /* The upshot of all of this is that many routines take a (type, host
7826 address, target address) triple as arguments to represent a value.
7827 The host address, if non-null, is supposed to contain an internal
7828 copy of the relevant data; otherwise, the program is to consult the
7829 target at the target address. */
7831 /* Assuming that VAL0 represents a pointer value, the result of
7832 dereferencing it. Differs from value_ind in its treatment of
7833 dynamic-sized types. */
7836 ada_value_ind (struct value *val0)
7838 struct value *val = value_ind (val0);
7840 if (ada_is_tagged_type (value_type (val), 0))
7841 val = ada_tag_value_at_base_address (val);
7843 return ada_to_fixed_value (val);
7846 /* The value resulting from dereferencing any "reference to"
7847 qualifiers on VAL0. */
7849 static struct value *
7850 ada_coerce_ref (struct value *val0)
7852 if (TYPE_CODE (value_type (val0)) == TYPE_CODE_REF)
7854 struct value *val = val0;
7856 val = coerce_ref (val);
7858 if (ada_is_tagged_type (value_type (val), 0))
7859 val = ada_tag_value_at_base_address (val);
7861 return ada_to_fixed_value (val);
7867 /* Return OFF rounded upward if necessary to a multiple of
7868 ALIGNMENT (a power of 2). */
7871 align_value (unsigned int off, unsigned int alignment)
7873 return (off + alignment - 1) & ~(alignment - 1);
7876 /* Return the bit alignment required for field #F of template type TYPE. */
7879 field_alignment (struct type *type, int f)
7881 const char *name = TYPE_FIELD_NAME (type, f);
7885 /* The field name should never be null, unless the debugging information
7886 is somehow malformed. In this case, we assume the field does not
7887 require any alignment. */
7891 len = strlen (name);
7893 if (!isdigit (name[len - 1]))
7896 if (isdigit (name[len - 2]))
7897 align_offset = len - 2;
7899 align_offset = len - 1;
7901 if (align_offset < 7 || !startswith (name + align_offset - 6, "___XV"))
7902 return TARGET_CHAR_BIT;
7904 return atoi (name + align_offset) * TARGET_CHAR_BIT;
7907 /* Find a typedef or tag symbol named NAME. Ignores ambiguity. */
7909 static struct symbol *
7910 ada_find_any_type_symbol (const char *name)
7914 sym = standard_lookup (name, get_selected_block (NULL), VAR_DOMAIN);
7915 if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
7918 sym = standard_lookup (name, NULL, STRUCT_DOMAIN);
7922 /* Find a type named NAME. Ignores ambiguity. This routine will look
7923 solely for types defined by debug info, it will not search the GDB
7926 static struct type *
7927 ada_find_any_type (const char *name)
7929 struct symbol *sym = ada_find_any_type_symbol (name);
7932 return SYMBOL_TYPE (sym);
7937 /* Given NAME_SYM and an associated BLOCK, find a "renaming" symbol
7938 associated with NAME_SYM's name. NAME_SYM may itself be a renaming
7939 symbol, in which case it is returned. Otherwise, this looks for
7940 symbols whose name is that of NAME_SYM suffixed with "___XR".
7941 Return symbol if found, and NULL otherwise. */
7944 ada_find_renaming_symbol (struct symbol *name_sym, const struct block *block)
7946 const char *name = SYMBOL_LINKAGE_NAME (name_sym);
7949 if (strstr (name, "___XR") != NULL)
7952 sym = find_old_style_renaming_symbol (name, block);
7957 /* Not right yet. FIXME pnh 7/20/2007. */
7958 sym = ada_find_any_type_symbol (name);
7959 if (sym != NULL && strstr (SYMBOL_LINKAGE_NAME (sym), "___XR") != NULL)
7965 static struct symbol *
7966 find_old_style_renaming_symbol (const char *name, const struct block *block)
7968 const struct symbol *function_sym = block_linkage_function (block);
7971 if (function_sym != NULL)
7973 /* If the symbol is defined inside a function, NAME is not fully
7974 qualified. This means we need to prepend the function name
7975 as well as adding the ``___XR'' suffix to build the name of
7976 the associated renaming symbol. */
7977 const char *function_name = SYMBOL_LINKAGE_NAME (function_sym);
7978 /* Function names sometimes contain suffixes used
7979 for instance to qualify nested subprograms. When building
7980 the XR type name, we need to make sure that this suffix is
7981 not included. So do not include any suffix in the function
7982 name length below. */
7983 int function_name_len = ada_name_prefix_len (function_name);
7984 const int rename_len = function_name_len + 2 /* "__" */
7985 + strlen (name) + 6 /* "___XR\0" */ ;
7987 /* Strip the suffix if necessary. */
7988 ada_remove_trailing_digits (function_name, &function_name_len);
7989 ada_remove_po_subprogram_suffix (function_name, &function_name_len);
7990 ada_remove_Xbn_suffix (function_name, &function_name_len);
7992 /* Library-level functions are a special case, as GNAT adds
7993 a ``_ada_'' prefix to the function name to avoid namespace
7994 pollution. However, the renaming symbols themselves do not
7995 have this prefix, so we need to skip this prefix if present. */
7996 if (function_name_len > 5 /* "_ada_" */
7997 && strstr (function_name, "_ada_") == function_name)
8000 function_name_len -= 5;
8003 rename = (char *) alloca (rename_len * sizeof (char));
8004 strncpy (rename, function_name, function_name_len);
8005 xsnprintf (rename + function_name_len, rename_len - function_name_len,
8010 const int rename_len = strlen (name) + 6;
8012 rename = (char *) alloca (rename_len * sizeof (char));
8013 xsnprintf (rename, rename_len * sizeof (char), "%s___XR", name);
8016 return ada_find_any_type_symbol (rename);
8019 /* Because of GNAT encoding conventions, several GDB symbols may match a
8020 given type name. If the type denoted by TYPE0 is to be preferred to
8021 that of TYPE1 for purposes of type printing, return non-zero;
8022 otherwise return 0. */
8025 ada_prefer_type (struct type *type0, struct type *type1)
8029 else if (type0 == NULL)
8031 else if (TYPE_CODE (type1) == TYPE_CODE_VOID)
8033 else if (TYPE_CODE (type0) == TYPE_CODE_VOID)
8035 else if (TYPE_NAME (type1) == NULL && TYPE_NAME (type0) != NULL)
8037 else if (ada_is_constrained_packed_array_type (type0))
8039 else if (ada_is_array_descriptor_type (type0)
8040 && !ada_is_array_descriptor_type (type1))
8044 const char *type0_name = type_name_no_tag (type0);
8045 const char *type1_name = type_name_no_tag (type1);
8047 if (type0_name != NULL && strstr (type0_name, "___XR") != NULL
8048 && (type1_name == NULL || strstr (type1_name, "___XR") == NULL))
8054 /* The name of TYPE, which is either its TYPE_NAME, or, if that is
8055 null, its TYPE_TAG_NAME. Null if TYPE is null. */
8058 ada_type_name (struct type *type)
8062 else if (TYPE_NAME (type) != NULL)
8063 return TYPE_NAME (type);
8065 return TYPE_TAG_NAME (type);
8068 /* Search the list of "descriptive" types associated to TYPE for a type
8069 whose name is NAME. */
8071 static struct type *
8072 find_parallel_type_by_descriptive_type (struct type *type, const char *name)
8074 struct type *result, *tmp;
8076 if (ada_ignore_descriptive_types_p)
8079 /* If there no descriptive-type info, then there is no parallel type
8081 if (!HAVE_GNAT_AUX_INFO (type))
8084 result = TYPE_DESCRIPTIVE_TYPE (type);
8085 while (result != NULL)
8087 const char *result_name = ada_type_name (result);
8089 if (result_name == NULL)
8091 warning (_("unexpected null name on descriptive type"));
8095 /* If the names match, stop. */
8096 if (strcmp (result_name, name) == 0)
8099 /* Otherwise, look at the next item on the list, if any. */
8100 if (HAVE_GNAT_AUX_INFO (result))
8101 tmp = TYPE_DESCRIPTIVE_TYPE (result);
8105 /* If not found either, try after having resolved the typedef. */
8110 result = check_typedef (result);
8111 if (HAVE_GNAT_AUX_INFO (result))
8112 result = TYPE_DESCRIPTIVE_TYPE (result);
8118 /* If we didn't find a match, see whether this is a packed array. With
8119 older compilers, the descriptive type information is either absent or
8120 irrelevant when it comes to packed arrays so the above lookup fails.
8121 Fall back to using a parallel lookup by name in this case. */
8122 if (result == NULL && ada_is_constrained_packed_array_type (type))
8123 return ada_find_any_type (name);
8128 /* Find a parallel type to TYPE with the specified NAME, using the
8129 descriptive type taken from the debugging information, if available,
8130 and otherwise using the (slower) name-based method. */
8132 static struct type *
8133 ada_find_parallel_type_with_name (struct type *type, const char *name)
8135 struct type *result = NULL;
8137 if (HAVE_GNAT_AUX_INFO (type))
8138 result = find_parallel_type_by_descriptive_type (type, name);
8140 result = ada_find_any_type (name);
8145 /* Same as above, but specify the name of the parallel type by appending
8146 SUFFIX to the name of TYPE. */
8149 ada_find_parallel_type (struct type *type, const char *suffix)
8152 const char *type_name = ada_type_name (type);
8155 if (type_name == NULL)
8158 len = strlen (type_name);
8160 name = (char *) alloca (len + strlen (suffix) + 1);
8162 strcpy (name, type_name);
8163 strcpy (name + len, suffix);
8165 return ada_find_parallel_type_with_name (type, name);
8168 /* If TYPE is a variable-size record type, return the corresponding template
8169 type describing its fields. Otherwise, return NULL. */
8171 static struct type *
8172 dynamic_template_type (struct type *type)
8174 type = ada_check_typedef (type);
8176 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_STRUCT
8177 || ada_type_name (type) == NULL)
8181 int len = strlen (ada_type_name (type));
8183 if (len > 6 && strcmp (ada_type_name (type) + len - 6, "___XVE") == 0)
8186 return ada_find_parallel_type (type, "___XVE");
8190 /* Assuming that TEMPL_TYPE is a union or struct type, returns
8191 non-zero iff field FIELD_NUM of TEMPL_TYPE has dynamic size. */
8194 is_dynamic_field (struct type *templ_type, int field_num)
8196 const char *name = TYPE_FIELD_NAME (templ_type, field_num);
8199 && TYPE_CODE (TYPE_FIELD_TYPE (templ_type, field_num)) == TYPE_CODE_PTR
8200 && strstr (name, "___XVL") != NULL;
8203 /* The index of the variant field of TYPE, or -1 if TYPE does not
8204 represent a variant record type. */
8207 variant_field_index (struct type *type)
8211 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_STRUCT)
8214 for (f = 0; f < TYPE_NFIELDS (type); f += 1)
8216 if (ada_is_variant_part (type, f))
8222 /* A record type with no fields. */
8224 static struct type *
8225 empty_record (struct type *templ)
8227 struct type *type = alloc_type_copy (templ);
8229 TYPE_CODE (type) = TYPE_CODE_STRUCT;
8230 TYPE_NFIELDS (type) = 0;
8231 TYPE_FIELDS (type) = NULL;
8232 INIT_CPLUS_SPECIFIC (type);
8233 TYPE_NAME (type) = "<empty>";
8234 TYPE_TAG_NAME (type) = NULL;
8235 TYPE_LENGTH (type) = 0;
8239 /* An ordinary record type (with fixed-length fields) that describes
8240 the value of type TYPE at VALADDR or ADDRESS (see comments at
8241 the beginning of this section) VAL according to GNAT conventions.
8242 DVAL0 should describe the (portion of a) record that contains any
8243 necessary discriminants. It should be NULL if value_type (VAL) is
8244 an outer-level type (i.e., as opposed to a branch of a variant.) A
8245 variant field (unless unchecked) is replaced by a particular branch
8248 If not KEEP_DYNAMIC_FIELDS, then all fields whose position or
8249 length are not statically known are discarded. As a consequence,
8250 VALADDR, ADDRESS and DVAL0 are ignored.
8252 NOTE: Limitations: For now, we assume that dynamic fields and
8253 variants occupy whole numbers of bytes. However, they need not be
8257 ada_template_to_fixed_record_type_1 (struct type *type,
8258 const gdb_byte *valaddr,
8259 CORE_ADDR address, struct value *dval0,
8260 int keep_dynamic_fields)
8262 struct value *mark = value_mark ();
8265 int nfields, bit_len;
8271 /* Compute the number of fields in this record type that are going
8272 to be processed: unless keep_dynamic_fields, this includes only
8273 fields whose position and length are static will be processed. */
8274 if (keep_dynamic_fields)
8275 nfields = TYPE_NFIELDS (type);
8279 while (nfields < TYPE_NFIELDS (type)
8280 && !ada_is_variant_part (type, nfields)
8281 && !is_dynamic_field (type, nfields))
8285 rtype = alloc_type_copy (type);
8286 TYPE_CODE (rtype) = TYPE_CODE_STRUCT;
8287 INIT_CPLUS_SPECIFIC (rtype);
8288 TYPE_NFIELDS (rtype) = nfields;
8289 TYPE_FIELDS (rtype) = (struct field *)
8290 TYPE_ALLOC (rtype, nfields * sizeof (struct field));
8291 memset (TYPE_FIELDS (rtype), 0, sizeof (struct field) * nfields);
8292 TYPE_NAME (rtype) = ada_type_name (type);
8293 TYPE_TAG_NAME (rtype) = NULL;
8294 TYPE_FIXED_INSTANCE (rtype) = 1;
8300 for (f = 0; f < nfields; f += 1)
8302 off = align_value (off, field_alignment (type, f))
8303 + TYPE_FIELD_BITPOS (type, f);
8304 SET_FIELD_BITPOS (TYPE_FIELD (rtype, f), off);
8305 TYPE_FIELD_BITSIZE (rtype, f) = 0;
8307 if (ada_is_variant_part (type, f))
8312 else if (is_dynamic_field (type, f))
8314 const gdb_byte *field_valaddr = valaddr;
8315 CORE_ADDR field_address = address;
8316 struct type *field_type =
8317 TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, f));
8321 /* rtype's length is computed based on the run-time
8322 value of discriminants. If the discriminants are not
8323 initialized, the type size may be completely bogus and
8324 GDB may fail to allocate a value for it. So check the
8325 size first before creating the value. */
8326 ada_ensure_varsize_limit (rtype);
8327 /* Using plain value_from_contents_and_address here
8328 causes problems because we will end up trying to
8329 resolve a type that is currently being
8331 dval = value_from_contents_and_address_unresolved (rtype,
8334 rtype = value_type (dval);
8339 /* If the type referenced by this field is an aligner type, we need
8340 to unwrap that aligner type, because its size might not be set.
8341 Keeping the aligner type would cause us to compute the wrong
8342 size for this field, impacting the offset of the all the fields
8343 that follow this one. */
8344 if (ada_is_aligner_type (field_type))
8346 long field_offset = TYPE_FIELD_BITPOS (field_type, f);
8348 field_valaddr = cond_offset_host (field_valaddr, field_offset);
8349 field_address = cond_offset_target (field_address, field_offset);
8350 field_type = ada_aligned_type (field_type);
8353 field_valaddr = cond_offset_host (field_valaddr,
8354 off / TARGET_CHAR_BIT);
8355 field_address = cond_offset_target (field_address,
8356 off / TARGET_CHAR_BIT);
8358 /* Get the fixed type of the field. Note that, in this case,
8359 we do not want to get the real type out of the tag: if
8360 the current field is the parent part of a tagged record,
8361 we will get the tag of the object. Clearly wrong: the real
8362 type of the parent is not the real type of the child. We
8363 would end up in an infinite loop. */
8364 field_type = ada_get_base_type (field_type);
8365 field_type = ada_to_fixed_type (field_type, field_valaddr,
8366 field_address, dval, 0);
8367 /* If the field size is already larger than the maximum
8368 object size, then the record itself will necessarily
8369 be larger than the maximum object size. We need to make
8370 this check now, because the size might be so ridiculously
8371 large (due to an uninitialized variable in the inferior)
8372 that it would cause an overflow when adding it to the
8374 ada_ensure_varsize_limit (field_type);
8376 TYPE_FIELD_TYPE (rtype, f) = field_type;
8377 TYPE_FIELD_NAME (rtype, f) = TYPE_FIELD_NAME (type, f);
8378 /* The multiplication can potentially overflow. But because
8379 the field length has been size-checked just above, and
8380 assuming that the maximum size is a reasonable value,
8381 an overflow should not happen in practice. So rather than
8382 adding overflow recovery code to this already complex code,
8383 we just assume that it's not going to happen. */
8385 TYPE_LENGTH (TYPE_FIELD_TYPE (rtype, f)) * TARGET_CHAR_BIT;
8389 /* Note: If this field's type is a typedef, it is important
8390 to preserve the typedef layer.
8392 Otherwise, we might be transforming a typedef to a fat
8393 pointer (encoding a pointer to an unconstrained array),
8394 into a basic fat pointer (encoding an unconstrained
8395 array). As both types are implemented using the same
8396 structure, the typedef is the only clue which allows us
8397 to distinguish between the two options. Stripping it
8398 would prevent us from printing this field appropriately. */
8399 TYPE_FIELD_TYPE (rtype, f) = TYPE_FIELD_TYPE (type, f);
8400 TYPE_FIELD_NAME (rtype, f) = TYPE_FIELD_NAME (type, f);
8401 if (TYPE_FIELD_BITSIZE (type, f) > 0)
8403 TYPE_FIELD_BITSIZE (rtype, f) = TYPE_FIELD_BITSIZE (type, f);
8406 struct type *field_type = TYPE_FIELD_TYPE (type, f);
8408 /* We need to be careful of typedefs when computing
8409 the length of our field. If this is a typedef,
8410 get the length of the target type, not the length
8412 if (TYPE_CODE (field_type) == TYPE_CODE_TYPEDEF)
8413 field_type = ada_typedef_target_type (field_type);
8416 TYPE_LENGTH (ada_check_typedef (field_type)) * TARGET_CHAR_BIT;
8419 if (off + fld_bit_len > bit_len)
8420 bit_len = off + fld_bit_len;
8422 TYPE_LENGTH (rtype) =
8423 align_value (bit_len, TARGET_CHAR_BIT) / TARGET_CHAR_BIT;
8426 /* We handle the variant part, if any, at the end because of certain
8427 odd cases in which it is re-ordered so as NOT to be the last field of
8428 the record. This can happen in the presence of representation
8430 if (variant_field >= 0)
8432 struct type *branch_type;
8434 off = TYPE_FIELD_BITPOS (rtype, variant_field);
8438 /* Using plain value_from_contents_and_address here causes
8439 problems because we will end up trying to resolve a type
8440 that is currently being constructed. */
8441 dval = value_from_contents_and_address_unresolved (rtype, valaddr,
8443 rtype = value_type (dval);
8449 to_fixed_variant_branch_type
8450 (TYPE_FIELD_TYPE (type, variant_field),
8451 cond_offset_host (valaddr, off / TARGET_CHAR_BIT),
8452 cond_offset_target (address, off / TARGET_CHAR_BIT), dval);
8453 if (branch_type == NULL)
8455 for (f = variant_field + 1; f < TYPE_NFIELDS (rtype); f += 1)
8456 TYPE_FIELDS (rtype)[f - 1] = TYPE_FIELDS (rtype)[f];
8457 TYPE_NFIELDS (rtype) -= 1;
8461 TYPE_FIELD_TYPE (rtype, variant_field) = branch_type;
8462 TYPE_FIELD_NAME (rtype, variant_field) = "S";
8464 TYPE_LENGTH (TYPE_FIELD_TYPE (rtype, variant_field)) *
8466 if (off + fld_bit_len > bit_len)
8467 bit_len = off + fld_bit_len;
8468 TYPE_LENGTH (rtype) =
8469 align_value (bit_len, TARGET_CHAR_BIT) / TARGET_CHAR_BIT;
8473 /* According to exp_dbug.ads, the size of TYPE for variable-size records
8474 should contain the alignment of that record, which should be a strictly
8475 positive value. If null or negative, then something is wrong, most
8476 probably in the debug info. In that case, we don't round up the size
8477 of the resulting type. If this record is not part of another structure,
8478 the current RTYPE length might be good enough for our purposes. */
8479 if (TYPE_LENGTH (type) <= 0)
8481 if (TYPE_NAME (rtype))
8482 warning (_("Invalid type size for `%s' detected: %d."),
8483 TYPE_NAME (rtype), TYPE_LENGTH (type));
8485 warning (_("Invalid type size for <unnamed> detected: %d."),
8486 TYPE_LENGTH (type));
8490 TYPE_LENGTH (rtype) = align_value (TYPE_LENGTH (rtype),
8491 TYPE_LENGTH (type));
8494 value_free_to_mark (mark);
8495 if (TYPE_LENGTH (rtype) > varsize_limit)
8496 error (_("record type with dynamic size is larger than varsize-limit"));
8500 /* As for ada_template_to_fixed_record_type_1 with KEEP_DYNAMIC_FIELDS
8503 static struct type *
8504 template_to_fixed_record_type (struct type *type, const gdb_byte *valaddr,
8505 CORE_ADDR address, struct value *dval0)
8507 return ada_template_to_fixed_record_type_1 (type, valaddr,
8511 /* An ordinary record type in which ___XVL-convention fields and
8512 ___XVU- and ___XVN-convention field types in TYPE0 are replaced with
8513 static approximations, containing all possible fields. Uses
8514 no runtime values. Useless for use in values, but that's OK,
8515 since the results are used only for type determinations. Works on both
8516 structs and unions. Representation note: to save space, we memorize
8517 the result of this function in the TYPE_TARGET_TYPE of the
8520 static struct type *
8521 template_to_static_fixed_type (struct type *type0)
8527 /* No need no do anything if the input type is already fixed. */
8528 if (TYPE_FIXED_INSTANCE (type0))
8531 /* Likewise if we already have computed the static approximation. */
8532 if (TYPE_TARGET_TYPE (type0) != NULL)
8533 return TYPE_TARGET_TYPE (type0);
8535 /* Don't clone TYPE0 until we are sure we are going to need a copy. */
8537 nfields = TYPE_NFIELDS (type0);
8539 /* Whether or not we cloned TYPE0, cache the result so that we don't do
8540 recompute all over next time. */
8541 TYPE_TARGET_TYPE (type0) = type;
8543 for (f = 0; f < nfields; f += 1)
8545 struct type *field_type = TYPE_FIELD_TYPE (type0, f);
8546 struct type *new_type;
8548 if (is_dynamic_field (type0, f))
8550 field_type = ada_check_typedef (field_type);
8551 new_type = to_static_fixed_type (TYPE_TARGET_TYPE (field_type));
8554 new_type = static_unwrap_type (field_type);
8556 if (new_type != field_type)
8558 /* Clone TYPE0 only the first time we get a new field type. */
8561 TYPE_TARGET_TYPE (type0) = type = alloc_type_copy (type0);
8562 TYPE_CODE (type) = TYPE_CODE (type0);
8563 INIT_CPLUS_SPECIFIC (type);
8564 TYPE_NFIELDS (type) = nfields;
8565 TYPE_FIELDS (type) = (struct field *)
8566 TYPE_ALLOC (type, nfields * sizeof (struct field));
8567 memcpy (TYPE_FIELDS (type), TYPE_FIELDS (type0),
8568 sizeof (struct field) * nfields);
8569 TYPE_NAME (type) = ada_type_name (type0);
8570 TYPE_TAG_NAME (type) = NULL;
8571 TYPE_FIXED_INSTANCE (type) = 1;
8572 TYPE_LENGTH (type) = 0;
8574 TYPE_FIELD_TYPE (type, f) = new_type;
8575 TYPE_FIELD_NAME (type, f) = TYPE_FIELD_NAME (type0, f);
8582 /* Given an object of type TYPE whose contents are at VALADDR and
8583 whose address in memory is ADDRESS, returns a revision of TYPE,
8584 which should be a non-dynamic-sized record, in which the variant
8585 part, if any, is replaced with the appropriate branch. Looks
8586 for discriminant values in DVAL0, which can be NULL if the record
8587 contains the necessary discriminant values. */
8589 static struct type *
8590 to_record_with_fixed_variant_part (struct type *type, const gdb_byte *valaddr,
8591 CORE_ADDR address, struct value *dval0)
8593 struct value *mark = value_mark ();
8596 struct type *branch_type;
8597 int nfields = TYPE_NFIELDS (type);
8598 int variant_field = variant_field_index (type);
8600 if (variant_field == -1)
8605 dval = value_from_contents_and_address (type, valaddr, address);
8606 type = value_type (dval);
8611 rtype = alloc_type_copy (type);
8612 TYPE_CODE (rtype) = TYPE_CODE_STRUCT;
8613 INIT_CPLUS_SPECIFIC (rtype);
8614 TYPE_NFIELDS (rtype) = nfields;
8615 TYPE_FIELDS (rtype) =
8616 (struct field *) TYPE_ALLOC (rtype, nfields * sizeof (struct field));
8617 memcpy (TYPE_FIELDS (rtype), TYPE_FIELDS (type),
8618 sizeof (struct field) * nfields);
8619 TYPE_NAME (rtype) = ada_type_name (type);
8620 TYPE_TAG_NAME (rtype) = NULL;
8621 TYPE_FIXED_INSTANCE (rtype) = 1;
8622 TYPE_LENGTH (rtype) = TYPE_LENGTH (type);
8624 branch_type = to_fixed_variant_branch_type
8625 (TYPE_FIELD_TYPE (type, variant_field),
8626 cond_offset_host (valaddr,
8627 TYPE_FIELD_BITPOS (type, variant_field)
8629 cond_offset_target (address,
8630 TYPE_FIELD_BITPOS (type, variant_field)
8631 / TARGET_CHAR_BIT), dval);
8632 if (branch_type == NULL)
8636 for (f = variant_field + 1; f < nfields; f += 1)
8637 TYPE_FIELDS (rtype)[f - 1] = TYPE_FIELDS (rtype)[f];
8638 TYPE_NFIELDS (rtype) -= 1;
8642 TYPE_FIELD_TYPE (rtype, variant_field) = branch_type;
8643 TYPE_FIELD_NAME (rtype, variant_field) = "S";
8644 TYPE_FIELD_BITSIZE (rtype, variant_field) = 0;
8645 TYPE_LENGTH (rtype) += TYPE_LENGTH (branch_type);
8647 TYPE_LENGTH (rtype) -= TYPE_LENGTH (TYPE_FIELD_TYPE (type, variant_field));
8649 value_free_to_mark (mark);
8653 /* An ordinary record type (with fixed-length fields) that describes
8654 the value at (TYPE0, VALADDR, ADDRESS) [see explanation at
8655 beginning of this section]. Any necessary discriminants' values
8656 should be in DVAL, a record value; it may be NULL if the object
8657 at ADDR itself contains any necessary discriminant values.
8658 Additionally, VALADDR and ADDRESS may also be NULL if no discriminant
8659 values from the record are needed. Except in the case that DVAL,
8660 VALADDR, and ADDRESS are all 0 or NULL, a variant field (unless
8661 unchecked) is replaced by a particular branch of the variant.
8663 NOTE: the case in which DVAL and VALADDR are NULL and ADDRESS is 0
8664 is questionable and may be removed. It can arise during the
8665 processing of an unconstrained-array-of-record type where all the
8666 variant branches have exactly the same size. This is because in
8667 such cases, the compiler does not bother to use the XVS convention
8668 when encoding the record. I am currently dubious of this
8669 shortcut and suspect the compiler should be altered. FIXME. */
8671 static struct type *
8672 to_fixed_record_type (struct type *type0, const gdb_byte *valaddr,
8673 CORE_ADDR address, struct value *dval)
8675 struct type *templ_type;
8677 if (TYPE_FIXED_INSTANCE (type0))
8680 templ_type = dynamic_template_type (type0);
8682 if (templ_type != NULL)
8683 return template_to_fixed_record_type (templ_type, valaddr, address, dval);
8684 else if (variant_field_index (type0) >= 0)
8686 if (dval == NULL && valaddr == NULL && address == 0)
8688 return to_record_with_fixed_variant_part (type0, valaddr, address,
8693 TYPE_FIXED_INSTANCE (type0) = 1;
8699 /* An ordinary record type (with fixed-length fields) that describes
8700 the value at (VAR_TYPE0, VALADDR, ADDRESS), where VAR_TYPE0 is a
8701 union type. Any necessary discriminants' values should be in DVAL,
8702 a record value. That is, this routine selects the appropriate
8703 branch of the union at ADDR according to the discriminant value
8704 indicated in the union's type name. Returns VAR_TYPE0 itself if
8705 it represents a variant subject to a pragma Unchecked_Union. */
8707 static struct type *
8708 to_fixed_variant_branch_type (struct type *var_type0, const gdb_byte *valaddr,
8709 CORE_ADDR address, struct value *dval)
8712 struct type *templ_type;
8713 struct type *var_type;
8715 if (TYPE_CODE (var_type0) == TYPE_CODE_PTR)
8716 var_type = TYPE_TARGET_TYPE (var_type0);
8718 var_type = var_type0;
8720 templ_type = ada_find_parallel_type (var_type, "___XVU");
8722 if (templ_type != NULL)
8723 var_type = templ_type;
8725 if (is_unchecked_variant (var_type, value_type (dval)))
8728 ada_which_variant_applies (var_type,
8729 value_type (dval), value_contents (dval));
8732 return empty_record (var_type);
8733 else if (is_dynamic_field (var_type, which))
8734 return to_fixed_record_type
8735 (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (var_type, which)),
8736 valaddr, address, dval);
8737 else if (variant_field_index (TYPE_FIELD_TYPE (var_type, which)) >= 0)
8739 to_fixed_record_type
8740 (TYPE_FIELD_TYPE (var_type, which), valaddr, address, dval);
8742 return TYPE_FIELD_TYPE (var_type, which);
8745 /* Assuming RANGE_TYPE is a TYPE_CODE_RANGE, return nonzero if
8746 ENCODING_TYPE, a type following the GNAT conventions for discrete
8747 type encodings, only carries redundant information. */
8750 ada_is_redundant_range_encoding (struct type *range_type,
8751 struct type *encoding_type)
8753 struct type *fixed_range_type;
8754 const char *bounds_str;
8758 gdb_assert (TYPE_CODE (range_type) == TYPE_CODE_RANGE);
8760 if (TYPE_CODE (get_base_type (range_type))
8761 != TYPE_CODE (get_base_type (encoding_type)))
8763 /* The compiler probably used a simple base type to describe
8764 the range type instead of the range's actual base type,
8765 expecting us to get the real base type from the encoding
8766 anyway. In this situation, the encoding cannot be ignored
8771 if (is_dynamic_type (range_type))
8774 if (TYPE_NAME (encoding_type) == NULL)
8777 bounds_str = strstr (TYPE_NAME (encoding_type), "___XDLU_");
8778 if (bounds_str == NULL)
8781 n = 8; /* Skip "___XDLU_". */
8782 if (!ada_scan_number (bounds_str, n, &lo, &n))
8784 if (TYPE_LOW_BOUND (range_type) != lo)
8787 n += 2; /* Skip the "__" separator between the two bounds. */
8788 if (!ada_scan_number (bounds_str, n, &hi, &n))
8790 if (TYPE_HIGH_BOUND (range_type) != hi)
8796 /* Given the array type ARRAY_TYPE, return nonzero if DESC_TYPE,
8797 a type following the GNAT encoding for describing array type
8798 indices, only carries redundant information. */
8801 ada_is_redundant_index_type_desc (struct type *array_type,
8802 struct type *desc_type)
8804 struct type *this_layer = check_typedef (array_type);
8807 for (i = 0; i < TYPE_NFIELDS (desc_type); i++)
8809 if (!ada_is_redundant_range_encoding (TYPE_INDEX_TYPE (this_layer),
8810 TYPE_FIELD_TYPE (desc_type, i)))
8812 this_layer = check_typedef (TYPE_TARGET_TYPE (this_layer));
8818 /* Assuming that TYPE0 is an array type describing the type of a value
8819 at ADDR, and that DVAL describes a record containing any
8820 discriminants used in TYPE0, returns a type for the value that
8821 contains no dynamic components (that is, no components whose sizes
8822 are determined by run-time quantities). Unless IGNORE_TOO_BIG is
8823 true, gives an error message if the resulting type's size is over
8826 static struct type *
8827 to_fixed_array_type (struct type *type0, struct value *dval,
8830 struct type *index_type_desc;
8831 struct type *result;
8832 int constrained_packed_array_p;
8833 static const char *xa_suffix = "___XA";
8835 type0 = ada_check_typedef (type0);
8836 if (TYPE_FIXED_INSTANCE (type0))
8839 constrained_packed_array_p = ada_is_constrained_packed_array_type (type0);
8840 if (constrained_packed_array_p)
8841 type0 = decode_constrained_packed_array_type (type0);
8843 index_type_desc = ada_find_parallel_type (type0, xa_suffix);
8845 /* As mentioned in exp_dbug.ads, for non bit-packed arrays an
8846 encoding suffixed with 'P' may still be generated. If so,
8847 it should be used to find the XA type. */
8849 if (index_type_desc == NULL)
8851 const char *type_name = ada_type_name (type0);
8853 if (type_name != NULL)
8855 const int len = strlen (type_name);
8856 char *name = (char *) alloca (len + strlen (xa_suffix));
8858 if (type_name[len - 1] == 'P')
8860 strcpy (name, type_name);
8861 strcpy (name + len - 1, xa_suffix);
8862 index_type_desc = ada_find_parallel_type_with_name (type0, name);
8867 ada_fixup_array_indexes_type (index_type_desc);
8868 if (index_type_desc != NULL
8869 && ada_is_redundant_index_type_desc (type0, index_type_desc))
8871 /* Ignore this ___XA parallel type, as it does not bring any
8872 useful information. This allows us to avoid creating fixed
8873 versions of the array's index types, which would be identical
8874 to the original ones. This, in turn, can also help avoid
8875 the creation of fixed versions of the array itself. */
8876 index_type_desc = NULL;
8879 if (index_type_desc == NULL)
8881 struct type *elt_type0 = ada_check_typedef (TYPE_TARGET_TYPE (type0));
8883 /* NOTE: elt_type---the fixed version of elt_type0---should never
8884 depend on the contents of the array in properly constructed
8886 /* Create a fixed version of the array element type.
8887 We're not providing the address of an element here,
8888 and thus the actual object value cannot be inspected to do
8889 the conversion. This should not be a problem, since arrays of
8890 unconstrained objects are not allowed. In particular, all
8891 the elements of an array of a tagged type should all be of
8892 the same type specified in the debugging info. No need to
8893 consult the object tag. */
8894 struct type *elt_type = ada_to_fixed_type (elt_type0, 0, 0, dval, 1);
8896 /* Make sure we always create a new array type when dealing with
8897 packed array types, since we're going to fix-up the array
8898 type length and element bitsize a little further down. */
8899 if (elt_type0 == elt_type && !constrained_packed_array_p)
8902 result = create_array_type (alloc_type_copy (type0),
8903 elt_type, TYPE_INDEX_TYPE (type0));
8908 struct type *elt_type0;
8911 for (i = TYPE_NFIELDS (index_type_desc); i > 0; i -= 1)
8912 elt_type0 = TYPE_TARGET_TYPE (elt_type0);
8914 /* NOTE: result---the fixed version of elt_type0---should never
8915 depend on the contents of the array in properly constructed
8917 /* Create a fixed version of the array element type.
8918 We're not providing the address of an element here,
8919 and thus the actual object value cannot be inspected to do
8920 the conversion. This should not be a problem, since arrays of
8921 unconstrained objects are not allowed. In particular, all
8922 the elements of an array of a tagged type should all be of
8923 the same type specified in the debugging info. No need to
8924 consult the object tag. */
8926 ada_to_fixed_type (ada_check_typedef (elt_type0), 0, 0, dval, 1);
8929 for (i = TYPE_NFIELDS (index_type_desc) - 1; i >= 0; i -= 1)
8931 struct type *range_type =
8932 to_fixed_range_type (TYPE_FIELD_TYPE (index_type_desc, i), dval);
8934 result = create_array_type (alloc_type_copy (elt_type0),
8935 result, range_type);
8936 elt_type0 = TYPE_TARGET_TYPE (elt_type0);
8938 if (!ignore_too_big && TYPE_LENGTH (result) > varsize_limit)
8939 error (_("array type with dynamic size is larger than varsize-limit"));
8942 /* We want to preserve the type name. This can be useful when
8943 trying to get the type name of a value that has already been
8944 printed (for instance, if the user did "print VAR; whatis $". */
8945 TYPE_NAME (result) = TYPE_NAME (type0);
8947 if (constrained_packed_array_p)
8949 /* So far, the resulting type has been created as if the original
8950 type was a regular (non-packed) array type. As a result, the
8951 bitsize of the array elements needs to be set again, and the array
8952 length needs to be recomputed based on that bitsize. */
8953 int len = TYPE_LENGTH (result) / TYPE_LENGTH (TYPE_TARGET_TYPE (result));
8954 int elt_bitsize = TYPE_FIELD_BITSIZE (type0, 0);
8956 TYPE_FIELD_BITSIZE (result, 0) = TYPE_FIELD_BITSIZE (type0, 0);
8957 TYPE_LENGTH (result) = len * elt_bitsize / HOST_CHAR_BIT;
8958 if (TYPE_LENGTH (result) * HOST_CHAR_BIT < len * elt_bitsize)
8959 TYPE_LENGTH (result)++;
8962 TYPE_FIXED_INSTANCE (result) = 1;
8967 /* A standard type (containing no dynamically sized components)
8968 corresponding to TYPE for the value (TYPE, VALADDR, ADDRESS)
8969 DVAL describes a record containing any discriminants used in TYPE0,
8970 and may be NULL if there are none, or if the object of type TYPE at
8971 ADDRESS or in VALADDR contains these discriminants.
8973 If CHECK_TAG is not null, in the case of tagged types, this function
8974 attempts to locate the object's tag and use it to compute the actual
8975 type. However, when ADDRESS is null, we cannot use it to determine the
8976 location of the tag, and therefore compute the tagged type's actual type.
8977 So we return the tagged type without consulting the tag. */
8979 static struct type *
8980 ada_to_fixed_type_1 (struct type *type, const gdb_byte *valaddr,
8981 CORE_ADDR address, struct value *dval, int check_tag)
8983 type = ada_check_typedef (type);
8984 switch (TYPE_CODE (type))
8988 case TYPE_CODE_STRUCT:
8990 struct type *static_type = to_static_fixed_type (type);
8991 struct type *fixed_record_type =
8992 to_fixed_record_type (type, valaddr, address, NULL);
8994 /* If STATIC_TYPE is a tagged type and we know the object's address,
8995 then we can determine its tag, and compute the object's actual
8996 type from there. Note that we have to use the fixed record
8997 type (the parent part of the record may have dynamic fields
8998 and the way the location of _tag is expressed may depend on
9001 if (check_tag && address != 0 && ada_is_tagged_type (static_type, 0))
9004 value_tag_from_contents_and_address
9008 struct type *real_type = type_from_tag (tag);
9010 value_from_contents_and_address (fixed_record_type,
9013 fixed_record_type = value_type (obj);
9014 if (real_type != NULL)
9015 return to_fixed_record_type
9017 value_address (ada_tag_value_at_base_address (obj)), NULL);
9020 /* Check to see if there is a parallel ___XVZ variable.
9021 If there is, then it provides the actual size of our type. */
9022 else if (ada_type_name (fixed_record_type) != NULL)
9024 const char *name = ada_type_name (fixed_record_type);
9026 = (char *) alloca (strlen (name) + 7 /* "___XVZ\0" */);
9030 xsnprintf (xvz_name, strlen (name) + 7, "%s___XVZ", name);
9031 size = get_int_var_value (xvz_name, &xvz_found);
9032 if (xvz_found && TYPE_LENGTH (fixed_record_type) != size)
9034 fixed_record_type = copy_type (fixed_record_type);
9035 TYPE_LENGTH (fixed_record_type) = size;
9037 /* The FIXED_RECORD_TYPE may have be a stub. We have
9038 observed this when the debugging info is STABS, and
9039 apparently it is something that is hard to fix.
9041 In practice, we don't need the actual type definition
9042 at all, because the presence of the XVZ variable allows us
9043 to assume that there must be a XVS type as well, which we
9044 should be able to use later, when we need the actual type
9047 In the meantime, pretend that the "fixed" type we are
9048 returning is NOT a stub, because this can cause trouble
9049 when using this type to create new types targeting it.
9050 Indeed, the associated creation routines often check
9051 whether the target type is a stub and will try to replace
9052 it, thus using a type with the wrong size. This, in turn,
9053 might cause the new type to have the wrong size too.
9054 Consider the case of an array, for instance, where the size
9055 of the array is computed from the number of elements in
9056 our array multiplied by the size of its element. */
9057 TYPE_STUB (fixed_record_type) = 0;
9060 return fixed_record_type;
9062 case TYPE_CODE_ARRAY:
9063 return to_fixed_array_type (type, dval, 1);
9064 case TYPE_CODE_UNION:
9068 return to_fixed_variant_branch_type (type, valaddr, address, dval);
9072 /* The same as ada_to_fixed_type_1, except that it preserves the type
9073 if it is a TYPE_CODE_TYPEDEF of a type that is already fixed.
9075 The typedef layer needs be preserved in order to differentiate between
9076 arrays and array pointers when both types are implemented using the same
9077 fat pointer. In the array pointer case, the pointer is encoded as
9078 a typedef of the pointer type. For instance, considering:
9080 type String_Access is access String;
9081 S1 : String_Access := null;
9083 To the debugger, S1 is defined as a typedef of type String. But
9084 to the user, it is a pointer. So if the user tries to print S1,
9085 we should not dereference the array, but print the array address
9088 If we didn't preserve the typedef layer, we would lose the fact that
9089 the type is to be presented as a pointer (needs de-reference before
9090 being printed). And we would also use the source-level type name. */
9093 ada_to_fixed_type (struct type *type, const gdb_byte *valaddr,
9094 CORE_ADDR address, struct value *dval, int check_tag)
9097 struct type *fixed_type =
9098 ada_to_fixed_type_1 (type, valaddr, address, dval, check_tag);
9100 /* If TYPE is a typedef and its target type is the same as the FIXED_TYPE,
9101 then preserve the typedef layer.
9103 Implementation note: We can only check the main-type portion of
9104 the TYPE and FIXED_TYPE, because eliminating the typedef layer
9105 from TYPE now returns a type that has the same instance flags
9106 as TYPE. For instance, if TYPE is a "typedef const", and its
9107 target type is a "struct", then the typedef elimination will return
9108 a "const" version of the target type. See check_typedef for more
9109 details about how the typedef layer elimination is done.
9111 brobecker/2010-11-19: It seems to me that the only case where it is
9112 useful to preserve the typedef layer is when dealing with fat pointers.
9113 Perhaps, we could add a check for that and preserve the typedef layer
9114 only in that situation. But this seems unecessary so far, probably
9115 because we call check_typedef/ada_check_typedef pretty much everywhere.
9117 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF
9118 && (TYPE_MAIN_TYPE (ada_typedef_target_type (type))
9119 == TYPE_MAIN_TYPE (fixed_type)))
9125 /* A standard (static-sized) type corresponding as well as possible to
9126 TYPE0, but based on no runtime data. */
9128 static struct type *
9129 to_static_fixed_type (struct type *type0)
9136 if (TYPE_FIXED_INSTANCE (type0))
9139 type0 = ada_check_typedef (type0);
9141 switch (TYPE_CODE (type0))
9145 case TYPE_CODE_STRUCT:
9146 type = dynamic_template_type (type0);
9148 return template_to_static_fixed_type (type);
9150 return template_to_static_fixed_type (type0);
9151 case TYPE_CODE_UNION:
9152 type = ada_find_parallel_type (type0, "___XVU");
9154 return template_to_static_fixed_type (type);
9156 return template_to_static_fixed_type (type0);
9160 /* A static approximation of TYPE with all type wrappers removed. */
9162 static struct type *
9163 static_unwrap_type (struct type *type)
9165 if (ada_is_aligner_type (type))
9167 struct type *type1 = TYPE_FIELD_TYPE (ada_check_typedef (type), 0);
9168 if (ada_type_name (type1) == NULL)
9169 TYPE_NAME (type1) = ada_type_name (type);
9171 return static_unwrap_type (type1);
9175 struct type *raw_real_type = ada_get_base_type (type);
9177 if (raw_real_type == type)
9180 return to_static_fixed_type (raw_real_type);
9184 /* In some cases, incomplete and private types require
9185 cross-references that are not resolved as records (for example,
9187 type FooP is access Foo;
9189 type Foo is array ...;
9190 ). In these cases, since there is no mechanism for producing
9191 cross-references to such types, we instead substitute for FooP a
9192 stub enumeration type that is nowhere resolved, and whose tag is
9193 the name of the actual type. Call these types "non-record stubs". */
9195 /* A type equivalent to TYPE that is not a non-record stub, if one
9196 exists, otherwise TYPE. */
9199 ada_check_typedef (struct type *type)
9204 /* If our type is a typedef type of a fat pointer, then we're done.
9205 We don't want to strip the TYPE_CODE_TYPDEF layer, because this is
9206 what allows us to distinguish between fat pointers that represent
9207 array types, and fat pointers that represent array access types
9208 (in both cases, the compiler implements them as fat pointers). */
9209 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF
9210 && is_thick_pntr (ada_typedef_target_type (type)))
9213 type = check_typedef (type);
9214 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_ENUM
9215 || !TYPE_STUB (type)
9216 || TYPE_TAG_NAME (type) == NULL)
9220 const char *name = TYPE_TAG_NAME (type);
9221 struct type *type1 = ada_find_any_type (name);
9226 /* TYPE1 might itself be a TYPE_CODE_TYPEDEF (this can happen with
9227 stubs pointing to arrays, as we don't create symbols for array
9228 types, only for the typedef-to-array types). If that's the case,
9229 strip the typedef layer. */
9230 if (TYPE_CODE (type1) == TYPE_CODE_TYPEDEF)
9231 type1 = ada_check_typedef (type1);
9237 /* A value representing the data at VALADDR/ADDRESS as described by
9238 type TYPE0, but with a standard (static-sized) type that correctly
9239 describes it. If VAL0 is not NULL and TYPE0 already is a standard
9240 type, then return VAL0 [this feature is simply to avoid redundant
9241 creation of struct values]. */
9243 static struct value *
9244 ada_to_fixed_value_create (struct type *type0, CORE_ADDR address,
9247 struct type *type = ada_to_fixed_type (type0, 0, address, NULL, 1);
9249 if (type == type0 && val0 != NULL)
9252 return value_from_contents_and_address (type, 0, address);
9255 /* A value representing VAL, but with a standard (static-sized) type
9256 that correctly describes it. Does not necessarily create a new
9260 ada_to_fixed_value (struct value *val)
9262 val = unwrap_value (val);
9263 val = ada_to_fixed_value_create (value_type (val),
9264 value_address (val),
9272 /* Table mapping attribute numbers to names.
9273 NOTE: Keep up to date with enum ada_attribute definition in ada-lang.h. */
9275 static const char *attribute_names[] = {
9293 ada_attribute_name (enum exp_opcode n)
9295 if (n >= OP_ATR_FIRST && n <= (int) OP_ATR_VAL)
9296 return attribute_names[n - OP_ATR_FIRST + 1];
9298 return attribute_names[0];
9301 /* Evaluate the 'POS attribute applied to ARG. */
9304 pos_atr (struct value *arg)
9306 struct value *val = coerce_ref (arg);
9307 struct type *type = value_type (val);
9310 if (!discrete_type_p (type))
9311 error (_("'POS only defined on discrete types"));
9313 if (!discrete_position (type, value_as_long (val), &result))
9314 error (_("enumeration value is invalid: can't find 'POS"));
9319 static struct value *
9320 value_pos_atr (struct type *type, struct value *arg)
9322 return value_from_longest (type, pos_atr (arg));
9325 /* Evaluate the TYPE'VAL attribute applied to ARG. */
9327 static struct value *
9328 value_val_atr (struct type *type, struct value *arg)
9330 if (!discrete_type_p (type))
9331 error (_("'VAL only defined on discrete types"));
9332 if (!integer_type_p (value_type (arg)))
9333 error (_("'VAL requires integral argument"));
9335 if (TYPE_CODE (type) == TYPE_CODE_ENUM)
9337 long pos = value_as_long (arg);
9339 if (pos < 0 || pos >= TYPE_NFIELDS (type))
9340 error (_("argument to 'VAL out of range"));
9341 return value_from_longest (type, TYPE_FIELD_ENUMVAL (type, pos));
9344 return value_from_longest (type, value_as_long (arg));
9350 /* True if TYPE appears to be an Ada character type.
9351 [At the moment, this is true only for Character and Wide_Character;
9352 It is a heuristic test that could stand improvement]. */
9355 ada_is_character_type (struct type *type)
9359 /* If the type code says it's a character, then assume it really is,
9360 and don't check any further. */
9361 if (TYPE_CODE (type) == TYPE_CODE_CHAR)
9364 /* Otherwise, assume it's a character type iff it is a discrete type
9365 with a known character type name. */
9366 name = ada_type_name (type);
9367 return (name != NULL
9368 && (TYPE_CODE (type) == TYPE_CODE_INT
9369 || TYPE_CODE (type) == TYPE_CODE_RANGE)
9370 && (strcmp (name, "character") == 0
9371 || strcmp (name, "wide_character") == 0
9372 || strcmp (name, "wide_wide_character") == 0
9373 || strcmp (name, "unsigned char") == 0));
9376 /* True if TYPE appears to be an Ada string type. */
9379 ada_is_string_type (struct type *type)
9381 type = ada_check_typedef (type);
9383 && TYPE_CODE (type) != TYPE_CODE_PTR
9384 && (ada_is_simple_array_type (type)
9385 || ada_is_array_descriptor_type (type))
9386 && ada_array_arity (type) == 1)
9388 struct type *elttype = ada_array_element_type (type, 1);
9390 return ada_is_character_type (elttype);
9396 /* The compiler sometimes provides a parallel XVS type for a given
9397 PAD type. Normally, it is safe to follow the PAD type directly,
9398 but older versions of the compiler have a bug that causes the offset
9399 of its "F" field to be wrong. Following that field in that case
9400 would lead to incorrect results, but this can be worked around
9401 by ignoring the PAD type and using the associated XVS type instead.
9403 Set to True if the debugger should trust the contents of PAD types.
9404 Otherwise, ignore the PAD type if there is a parallel XVS type. */
9405 static int trust_pad_over_xvs = 1;
9407 /* True if TYPE is a struct type introduced by the compiler to force the
9408 alignment of a value. Such types have a single field with a
9409 distinctive name. */
9412 ada_is_aligner_type (struct type *type)
9414 type = ada_check_typedef (type);
9416 if (!trust_pad_over_xvs && ada_find_parallel_type (type, "___XVS") != NULL)
9419 return (TYPE_CODE (type) == TYPE_CODE_STRUCT
9420 && TYPE_NFIELDS (type) == 1
9421 && strcmp (TYPE_FIELD_NAME (type, 0), "F") == 0);
9424 /* If there is an ___XVS-convention type parallel to SUBTYPE, return
9425 the parallel type. */
9428 ada_get_base_type (struct type *raw_type)
9430 struct type *real_type_namer;
9431 struct type *raw_real_type;
9433 if (raw_type == NULL || TYPE_CODE (raw_type) != TYPE_CODE_STRUCT)
9436 if (ada_is_aligner_type (raw_type))
9437 /* The encoding specifies that we should always use the aligner type.
9438 So, even if this aligner type has an associated XVS type, we should
9441 According to the compiler gurus, an XVS type parallel to an aligner
9442 type may exist because of a stabs limitation. In stabs, aligner
9443 types are empty because the field has a variable-sized type, and
9444 thus cannot actually be used as an aligner type. As a result,
9445 we need the associated parallel XVS type to decode the type.
9446 Since the policy in the compiler is to not change the internal
9447 representation based on the debugging info format, we sometimes
9448 end up having a redundant XVS type parallel to the aligner type. */
9451 real_type_namer = ada_find_parallel_type (raw_type, "___XVS");
9452 if (real_type_namer == NULL
9453 || TYPE_CODE (real_type_namer) != TYPE_CODE_STRUCT
9454 || TYPE_NFIELDS (real_type_namer) != 1)
9457 if (TYPE_CODE (TYPE_FIELD_TYPE (real_type_namer, 0)) != TYPE_CODE_REF)
9459 /* This is an older encoding form where the base type needs to be
9460 looked up by name. We prefer the newer enconding because it is
9462 raw_real_type = ada_find_any_type (TYPE_FIELD_NAME (real_type_namer, 0));
9463 if (raw_real_type == NULL)
9466 return raw_real_type;
9469 /* The field in our XVS type is a reference to the base type. */
9470 return TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (real_type_namer, 0));
9473 /* The type of value designated by TYPE, with all aligners removed. */
9476 ada_aligned_type (struct type *type)
9478 if (ada_is_aligner_type (type))
9479 return ada_aligned_type (TYPE_FIELD_TYPE (type, 0));
9481 return ada_get_base_type (type);
9485 /* The address of the aligned value in an object at address VALADDR
9486 having type TYPE. Assumes ada_is_aligner_type (TYPE). */
9489 ada_aligned_value_addr (struct type *type, const gdb_byte *valaddr)
9491 if (ada_is_aligner_type (type))
9492 return ada_aligned_value_addr (TYPE_FIELD_TYPE (type, 0),
9494 TYPE_FIELD_BITPOS (type,
9495 0) / TARGET_CHAR_BIT);
9502 /* The printed representation of an enumeration literal with encoded
9503 name NAME. The value is good to the next call of ada_enum_name. */
9505 ada_enum_name (const char *name)
9507 static char *result;
9508 static size_t result_len = 0;
9511 /* First, unqualify the enumeration name:
9512 1. Search for the last '.' character. If we find one, then skip
9513 all the preceding characters, the unqualified name starts
9514 right after that dot.
9515 2. Otherwise, we may be debugging on a target where the compiler
9516 translates dots into "__". Search forward for double underscores,
9517 but stop searching when we hit an overloading suffix, which is
9518 of the form "__" followed by digits. */
9520 tmp = strrchr (name, '.');
9525 while ((tmp = strstr (name, "__")) != NULL)
9527 if (isdigit (tmp[2]))
9538 if (name[1] == 'U' || name[1] == 'W')
9540 if (sscanf (name + 2, "%x", &v) != 1)
9546 GROW_VECT (result, result_len, 16);
9547 if (isascii (v) && isprint (v))
9548 xsnprintf (result, result_len, "'%c'", v);
9549 else if (name[1] == 'U')
9550 xsnprintf (result, result_len, "[\"%02x\"]", v);
9552 xsnprintf (result, result_len, "[\"%04x\"]", v);
9558 tmp = strstr (name, "__");
9560 tmp = strstr (name, "$");
9563 GROW_VECT (result, result_len, tmp - name + 1);
9564 strncpy (result, name, tmp - name);
9565 result[tmp - name] = '\0';
9573 /* Evaluate the subexpression of EXP starting at *POS as for
9574 evaluate_type, updating *POS to point just past the evaluated
9577 static struct value *
9578 evaluate_subexp_type (struct expression *exp, int *pos)
9580 return evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
9583 /* If VAL is wrapped in an aligner or subtype wrapper, return the
9586 static struct value *
9587 unwrap_value (struct value *val)
9589 struct type *type = ada_check_typedef (value_type (val));
9591 if (ada_is_aligner_type (type))
9593 struct value *v = ada_value_struct_elt (val, "F", 0);
9594 struct type *val_type = ada_check_typedef (value_type (v));
9596 if (ada_type_name (val_type) == NULL)
9597 TYPE_NAME (val_type) = ada_type_name (type);
9599 return unwrap_value (v);
9603 struct type *raw_real_type =
9604 ada_check_typedef (ada_get_base_type (type));
9606 /* If there is no parallel XVS or XVE type, then the value is
9607 already unwrapped. Return it without further modification. */
9608 if ((type == raw_real_type)
9609 && ada_find_parallel_type (type, "___XVE") == NULL)
9613 coerce_unspec_val_to_type
9614 (val, ada_to_fixed_type (raw_real_type, 0,
9615 value_address (val),
9620 static struct value *
9621 cast_to_fixed (struct type *type, struct value *arg)
9625 if (type == value_type (arg))
9627 else if (ada_is_fixed_point_type (value_type (arg)))
9628 val = ada_float_to_fixed (type,
9629 ada_fixed_to_float (value_type (arg),
9630 value_as_long (arg)));
9633 DOUBLEST argd = value_as_double (arg);
9635 val = ada_float_to_fixed (type, argd);
9638 return value_from_longest (type, val);
9641 static struct value *
9642 cast_from_fixed (struct type *type, struct value *arg)
9644 DOUBLEST val = ada_fixed_to_float (value_type (arg),
9645 value_as_long (arg));
9647 return value_from_double (type, val);
9650 /* Given two array types T1 and T2, return nonzero iff both arrays
9651 contain the same number of elements. */
9654 ada_same_array_size_p (struct type *t1, struct type *t2)
9656 LONGEST lo1, hi1, lo2, hi2;
9658 /* Get the array bounds in order to verify that the size of
9659 the two arrays match. */
9660 if (!get_array_bounds (t1, &lo1, &hi1)
9661 || !get_array_bounds (t2, &lo2, &hi2))
9662 error (_("unable to determine array bounds"));
9664 /* To make things easier for size comparison, normalize a bit
9665 the case of empty arrays by making sure that the difference
9666 between upper bound and lower bound is always -1. */
9672 return (hi1 - lo1 == hi2 - lo2);
9675 /* Assuming that VAL is an array of integrals, and TYPE represents
9676 an array with the same number of elements, but with wider integral
9677 elements, return an array "casted" to TYPE. In practice, this
9678 means that the returned array is built by casting each element
9679 of the original array into TYPE's (wider) element type. */
9681 static struct value *
9682 ada_promote_array_of_integrals (struct type *type, struct value *val)
9684 struct type *elt_type = TYPE_TARGET_TYPE (type);
9689 /* Verify that both val and type are arrays of scalars, and
9690 that the size of val's elements is smaller than the size
9691 of type's element. */
9692 gdb_assert (TYPE_CODE (type) == TYPE_CODE_ARRAY);
9693 gdb_assert (is_integral_type (TYPE_TARGET_TYPE (type)));
9694 gdb_assert (TYPE_CODE (value_type (val)) == TYPE_CODE_ARRAY);
9695 gdb_assert (is_integral_type (TYPE_TARGET_TYPE (value_type (val))));
9696 gdb_assert (TYPE_LENGTH (TYPE_TARGET_TYPE (type))
9697 > TYPE_LENGTH (TYPE_TARGET_TYPE (value_type (val))));
9699 if (!get_array_bounds (type, &lo, &hi))
9700 error (_("unable to determine array bounds"));
9702 res = allocate_value (type);
9704 /* Promote each array element. */
9705 for (i = 0; i < hi - lo + 1; i++)
9707 struct value *elt = value_cast (elt_type, value_subscript (val, lo + i));
9709 memcpy (value_contents_writeable (res) + (i * TYPE_LENGTH (elt_type)),
9710 value_contents_all (elt), TYPE_LENGTH (elt_type));
9716 /* Coerce VAL as necessary for assignment to an lval of type TYPE, and
9717 return the converted value. */
9719 static struct value *
9720 coerce_for_assign (struct type *type, struct value *val)
9722 struct type *type2 = value_type (val);
9727 type2 = ada_check_typedef (type2);
9728 type = ada_check_typedef (type);
9730 if (TYPE_CODE (type2) == TYPE_CODE_PTR
9731 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
9733 val = ada_value_ind (val);
9734 type2 = value_type (val);
9737 if (TYPE_CODE (type2) == TYPE_CODE_ARRAY
9738 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
9740 if (!ada_same_array_size_p (type, type2))
9741 error (_("cannot assign arrays of different length"));
9743 if (is_integral_type (TYPE_TARGET_TYPE (type))
9744 && is_integral_type (TYPE_TARGET_TYPE (type2))
9745 && TYPE_LENGTH (TYPE_TARGET_TYPE (type2))
9746 < TYPE_LENGTH (TYPE_TARGET_TYPE (type)))
9748 /* Allow implicit promotion of the array elements to
9750 return ada_promote_array_of_integrals (type, val);
9753 if (TYPE_LENGTH (TYPE_TARGET_TYPE (type2))
9754 != TYPE_LENGTH (TYPE_TARGET_TYPE (type)))
9755 error (_("Incompatible types in assignment"));
9756 deprecated_set_value_type (val, type);
9761 static struct value *
9762 ada_value_binop (struct value *arg1, struct value *arg2, enum exp_opcode op)
9765 struct type *type1, *type2;
9768 arg1 = coerce_ref (arg1);
9769 arg2 = coerce_ref (arg2);
9770 type1 = get_base_type (ada_check_typedef (value_type (arg1)));
9771 type2 = get_base_type (ada_check_typedef (value_type (arg2)));
9773 if (TYPE_CODE (type1) != TYPE_CODE_INT
9774 || TYPE_CODE (type2) != TYPE_CODE_INT)
9775 return value_binop (arg1, arg2, op);
9784 return value_binop (arg1, arg2, op);
9787 v2 = value_as_long (arg2);
9789 error (_("second operand of %s must not be zero."), op_string (op));
9791 if (TYPE_UNSIGNED (type1) || op == BINOP_MOD)
9792 return value_binop (arg1, arg2, op);
9794 v1 = value_as_long (arg1);
9799 if (!TRUNCATION_TOWARDS_ZERO && v1 * (v1 % v2) < 0)
9800 v += v > 0 ? -1 : 1;
9808 /* Should not reach this point. */
9812 val = allocate_value (type1);
9813 store_unsigned_integer (value_contents_raw (val),
9814 TYPE_LENGTH (value_type (val)),
9815 gdbarch_byte_order (get_type_arch (type1)), v);
9820 ada_value_equal (struct value *arg1, struct value *arg2)
9822 if (ada_is_direct_array_type (value_type (arg1))
9823 || ada_is_direct_array_type (value_type (arg2)))
9825 /* Automatically dereference any array reference before
9826 we attempt to perform the comparison. */
9827 arg1 = ada_coerce_ref (arg1);
9828 arg2 = ada_coerce_ref (arg2);
9830 arg1 = ada_coerce_to_simple_array (arg1);
9831 arg2 = ada_coerce_to_simple_array (arg2);
9832 if (TYPE_CODE (value_type (arg1)) != TYPE_CODE_ARRAY
9833 || TYPE_CODE (value_type (arg2)) != TYPE_CODE_ARRAY)
9834 error (_("Attempt to compare array with non-array"));
9835 /* FIXME: The following works only for types whose
9836 representations use all bits (no padding or undefined bits)
9837 and do not have user-defined equality. */
9839 TYPE_LENGTH (value_type (arg1)) == TYPE_LENGTH (value_type (arg2))
9840 && memcmp (value_contents (arg1), value_contents (arg2),
9841 TYPE_LENGTH (value_type (arg1))) == 0;
9843 return value_equal (arg1, arg2);
9846 /* Total number of component associations in the aggregate starting at
9847 index PC in EXP. Assumes that index PC is the start of an
9851 num_component_specs (struct expression *exp, int pc)
9855 m = exp->elts[pc + 1].longconst;
9858 for (i = 0; i < m; i += 1)
9860 switch (exp->elts[pc].opcode)
9866 n += exp->elts[pc + 1].longconst;
9869 ada_evaluate_subexp (NULL, exp, &pc, EVAL_SKIP);
9874 /* Assign the result of evaluating EXP starting at *POS to the INDEXth
9875 component of LHS (a simple array or a record), updating *POS past
9876 the expression, assuming that LHS is contained in CONTAINER. Does
9877 not modify the inferior's memory, nor does it modify LHS (unless
9878 LHS == CONTAINER). */
9881 assign_component (struct value *container, struct value *lhs, LONGEST index,
9882 struct expression *exp, int *pos)
9884 struct value *mark = value_mark ();
9887 if (TYPE_CODE (value_type (lhs)) == TYPE_CODE_ARRAY)
9889 struct type *index_type = builtin_type (exp->gdbarch)->builtin_int;
9890 struct value *index_val = value_from_longest (index_type, index);
9892 elt = unwrap_value (ada_value_subscript (lhs, 1, &index_val));
9896 elt = ada_index_struct_field (index, lhs, 0, value_type (lhs));
9897 elt = ada_to_fixed_value (elt);
9900 if (exp->elts[*pos].opcode == OP_AGGREGATE)
9901 assign_aggregate (container, elt, exp, pos, EVAL_NORMAL);
9903 value_assign_to_component (container, elt,
9904 ada_evaluate_subexp (NULL, exp, pos,
9907 value_free_to_mark (mark);
9910 /* Assuming that LHS represents an lvalue having a record or array
9911 type, and EXP->ELTS[*POS] is an OP_AGGREGATE, evaluate an assignment
9912 of that aggregate's value to LHS, advancing *POS past the
9913 aggregate. NOSIDE is as for evaluate_subexp. CONTAINER is an
9914 lvalue containing LHS (possibly LHS itself). Does not modify
9915 the inferior's memory, nor does it modify the contents of
9916 LHS (unless == CONTAINER). Returns the modified CONTAINER. */
9918 static struct value *
9919 assign_aggregate (struct value *container,
9920 struct value *lhs, struct expression *exp,
9921 int *pos, enum noside noside)
9923 struct type *lhs_type;
9924 int n = exp->elts[*pos+1].longconst;
9925 LONGEST low_index, high_index;
9928 int max_indices, num_indices;
9932 if (noside != EVAL_NORMAL)
9934 for (i = 0; i < n; i += 1)
9935 ada_evaluate_subexp (NULL, exp, pos, noside);
9939 container = ada_coerce_ref (container);
9940 if (ada_is_direct_array_type (value_type (container)))
9941 container = ada_coerce_to_simple_array (container);
9942 lhs = ada_coerce_ref (lhs);
9943 if (!deprecated_value_modifiable (lhs))
9944 error (_("Left operand of assignment is not a modifiable lvalue."));
9946 lhs_type = value_type (lhs);
9947 if (ada_is_direct_array_type (lhs_type))
9949 lhs = ada_coerce_to_simple_array (lhs);
9950 lhs_type = value_type (lhs);
9951 low_index = TYPE_ARRAY_LOWER_BOUND_VALUE (lhs_type);
9952 high_index = TYPE_ARRAY_UPPER_BOUND_VALUE (lhs_type);
9954 else if (TYPE_CODE (lhs_type) == TYPE_CODE_STRUCT)
9957 high_index = num_visible_fields (lhs_type) - 1;
9960 error (_("Left-hand side must be array or record."));
9962 num_specs = num_component_specs (exp, *pos - 3);
9963 max_indices = 4 * num_specs + 4;
9964 indices = XALLOCAVEC (LONGEST, max_indices);
9965 indices[0] = indices[1] = low_index - 1;
9966 indices[2] = indices[3] = high_index + 1;
9969 for (i = 0; i < n; i += 1)
9971 switch (exp->elts[*pos].opcode)
9974 aggregate_assign_from_choices (container, lhs, exp, pos, indices,
9975 &num_indices, max_indices,
9976 low_index, high_index);
9979 aggregate_assign_positional (container, lhs, exp, pos, indices,
9980 &num_indices, max_indices,
9981 low_index, high_index);
9985 error (_("Misplaced 'others' clause"));
9986 aggregate_assign_others (container, lhs, exp, pos, indices,
9987 num_indices, low_index, high_index);
9990 error (_("Internal error: bad aggregate clause"));
9997 /* Assign into the component of LHS indexed by the OP_POSITIONAL
9998 construct at *POS, updating *POS past the construct, given that
9999 the positions are relative to lower bound LOW, where HIGH is the
10000 upper bound. Record the position in INDICES[0 .. MAX_INDICES-1]
10001 updating *NUM_INDICES as needed. CONTAINER is as for
10002 assign_aggregate. */
10004 aggregate_assign_positional (struct value *container,
10005 struct value *lhs, struct expression *exp,
10006 int *pos, LONGEST *indices, int *num_indices,
10007 int max_indices, LONGEST low, LONGEST high)
10009 LONGEST ind = longest_to_int (exp->elts[*pos + 1].longconst) + low;
10011 if (ind - 1 == high)
10012 warning (_("Extra components in aggregate ignored."));
10015 add_component_interval (ind, ind, indices, num_indices, max_indices);
10017 assign_component (container, lhs, ind, exp, pos);
10020 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
10023 /* Assign into the components of LHS indexed by the OP_CHOICES
10024 construct at *POS, updating *POS past the construct, given that
10025 the allowable indices are LOW..HIGH. Record the indices assigned
10026 to in INDICES[0 .. MAX_INDICES-1], updating *NUM_INDICES as
10027 needed. CONTAINER is as for assign_aggregate. */
10029 aggregate_assign_from_choices (struct value *container,
10030 struct value *lhs, struct expression *exp,
10031 int *pos, LONGEST *indices, int *num_indices,
10032 int max_indices, LONGEST low, LONGEST high)
10035 int n_choices = longest_to_int (exp->elts[*pos+1].longconst);
10036 int choice_pos, expr_pc;
10037 int is_array = ada_is_direct_array_type (value_type (lhs));
10039 choice_pos = *pos += 3;
10041 for (j = 0; j < n_choices; j += 1)
10042 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
10044 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
10046 for (j = 0; j < n_choices; j += 1)
10048 LONGEST lower, upper;
10049 enum exp_opcode op = exp->elts[choice_pos].opcode;
10051 if (op == OP_DISCRETE_RANGE)
10054 lower = value_as_long (ada_evaluate_subexp (NULL, exp, pos,
10056 upper = value_as_long (ada_evaluate_subexp (NULL, exp, pos,
10061 lower = value_as_long (ada_evaluate_subexp (NULL, exp, &choice_pos,
10073 name = &exp->elts[choice_pos + 2].string;
10076 name = SYMBOL_NATURAL_NAME (exp->elts[choice_pos + 2].symbol);
10079 error (_("Invalid record component association."));
10081 ada_evaluate_subexp (NULL, exp, &choice_pos, EVAL_SKIP);
10083 if (! find_struct_field (name, value_type (lhs), 0,
10084 NULL, NULL, NULL, NULL, &ind))
10085 error (_("Unknown component name: %s."), name);
10086 lower = upper = ind;
10089 if (lower <= upper && (lower < low || upper > high))
10090 error (_("Index in component association out of bounds."));
10092 add_component_interval (lower, upper, indices, num_indices,
10094 while (lower <= upper)
10099 assign_component (container, lhs, lower, exp, &pos1);
10105 /* Assign the value of the expression in the OP_OTHERS construct in
10106 EXP at *POS into the components of LHS indexed from LOW .. HIGH that
10107 have not been previously assigned. The index intervals already assigned
10108 are in INDICES[0 .. NUM_INDICES-1]. Updates *POS to after the
10109 OP_OTHERS clause. CONTAINER is as for assign_aggregate. */
10111 aggregate_assign_others (struct value *container,
10112 struct value *lhs, struct expression *exp,
10113 int *pos, LONGEST *indices, int num_indices,
10114 LONGEST low, LONGEST high)
10117 int expr_pc = *pos + 1;
10119 for (i = 0; i < num_indices - 2; i += 2)
10123 for (ind = indices[i + 1] + 1; ind < indices[i + 2]; ind += 1)
10127 localpos = expr_pc;
10128 assign_component (container, lhs, ind, exp, &localpos);
10131 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
10134 /* Add the interval [LOW .. HIGH] to the sorted set of intervals
10135 [ INDICES[0] .. INDICES[1] ],..., [ INDICES[*SIZE-2] .. INDICES[*SIZE-1] ],
10136 modifying *SIZE as needed. It is an error if *SIZE exceeds
10137 MAX_SIZE. The resulting intervals do not overlap. */
10139 add_component_interval (LONGEST low, LONGEST high,
10140 LONGEST* indices, int *size, int max_size)
10144 for (i = 0; i < *size; i += 2) {
10145 if (high >= indices[i] && low <= indices[i + 1])
10149 for (kh = i + 2; kh < *size; kh += 2)
10150 if (high < indices[kh])
10152 if (low < indices[i])
10154 indices[i + 1] = indices[kh - 1];
10155 if (high > indices[i + 1])
10156 indices[i + 1] = high;
10157 memcpy (indices + i + 2, indices + kh, *size - kh);
10158 *size -= kh - i - 2;
10161 else if (high < indices[i])
10165 if (*size == max_size)
10166 error (_("Internal error: miscounted aggregate components."));
10168 for (j = *size-1; j >= i+2; j -= 1)
10169 indices[j] = indices[j - 2];
10171 indices[i + 1] = high;
10174 /* Perform and Ada cast of ARG2 to type TYPE if the type of ARG2
10177 static struct value *
10178 ada_value_cast (struct type *type, struct value *arg2, enum noside noside)
10180 if (type == ada_check_typedef (value_type (arg2)))
10183 if (ada_is_fixed_point_type (type))
10184 return (cast_to_fixed (type, arg2));
10186 if (ada_is_fixed_point_type (value_type (arg2)))
10187 return cast_from_fixed (type, arg2);
10189 return value_cast (type, arg2);
10192 /* Evaluating Ada expressions, and printing their result.
10193 ------------------------------------------------------
10198 We usually evaluate an Ada expression in order to print its value.
10199 We also evaluate an expression in order to print its type, which
10200 happens during the EVAL_AVOID_SIDE_EFFECTS phase of the evaluation,
10201 but we'll focus mostly on the EVAL_NORMAL phase. In practice, the
10202 EVAL_AVOID_SIDE_EFFECTS phase allows us to simplify certain aspects of
10203 the evaluation compared to the EVAL_NORMAL, but is otherwise very
10206 Evaluating expressions is a little more complicated for Ada entities
10207 than it is for entities in languages such as C. The main reason for
10208 this is that Ada provides types whose definition might be dynamic.
10209 One example of such types is variant records. Or another example
10210 would be an array whose bounds can only be known at run time.
10212 The following description is a general guide as to what should be
10213 done (and what should NOT be done) in order to evaluate an expression
10214 involving such types, and when. This does not cover how the semantic
10215 information is encoded by GNAT as this is covered separatly. For the
10216 document used as the reference for the GNAT encoding, see exp_dbug.ads
10217 in the GNAT sources.
10219 Ideally, we should embed each part of this description next to its
10220 associated code. Unfortunately, the amount of code is so vast right
10221 now that it's hard to see whether the code handling a particular
10222 situation might be duplicated or not. One day, when the code is
10223 cleaned up, this guide might become redundant with the comments
10224 inserted in the code, and we might want to remove it.
10226 2. ``Fixing'' an Entity, the Simple Case:
10227 -----------------------------------------
10229 When evaluating Ada expressions, the tricky issue is that they may
10230 reference entities whose type contents and size are not statically
10231 known. Consider for instance a variant record:
10233 type Rec (Empty : Boolean := True) is record
10236 when False => Value : Integer;
10239 Yes : Rec := (Empty => False, Value => 1);
10240 No : Rec := (empty => True);
10242 The size and contents of that record depends on the value of the
10243 descriminant (Rec.Empty). At this point, neither the debugging
10244 information nor the associated type structure in GDB are able to
10245 express such dynamic types. So what the debugger does is to create
10246 "fixed" versions of the type that applies to the specific object.
10247 We also informally refer to this opperation as "fixing" an object,
10248 which means creating its associated fixed type.
10250 Example: when printing the value of variable "Yes" above, its fixed
10251 type would look like this:
10258 On the other hand, if we printed the value of "No", its fixed type
10265 Things become a little more complicated when trying to fix an entity
10266 with a dynamic type that directly contains another dynamic type,
10267 such as an array of variant records, for instance. There are
10268 two possible cases: Arrays, and records.
10270 3. ``Fixing'' Arrays:
10271 ---------------------
10273 The type structure in GDB describes an array in terms of its bounds,
10274 and the type of its elements. By design, all elements in the array
10275 have the same type and we cannot represent an array of variant elements
10276 using the current type structure in GDB. When fixing an array,
10277 we cannot fix the array element, as we would potentially need one
10278 fixed type per element of the array. As a result, the best we can do
10279 when fixing an array is to produce an array whose bounds and size
10280 are correct (allowing us to read it from memory), but without having
10281 touched its element type. Fixing each element will be done later,
10282 when (if) necessary.
10284 Arrays are a little simpler to handle than records, because the same
10285 amount of memory is allocated for each element of the array, even if
10286 the amount of space actually used by each element differs from element
10287 to element. Consider for instance the following array of type Rec:
10289 type Rec_Array is array (1 .. 2) of Rec;
10291 The actual amount of memory occupied by each element might be different
10292 from element to element, depending on the value of their discriminant.
10293 But the amount of space reserved for each element in the array remains
10294 fixed regardless. So we simply need to compute that size using
10295 the debugging information available, from which we can then determine
10296 the array size (we multiply the number of elements of the array by
10297 the size of each element).
10299 The simplest case is when we have an array of a constrained element
10300 type. For instance, consider the following type declarations:
10302 type Bounded_String (Max_Size : Integer) is
10304 Buffer : String (1 .. Max_Size);
10306 type Bounded_String_Array is array (1 ..2) of Bounded_String (80);
10308 In this case, the compiler describes the array as an array of
10309 variable-size elements (identified by its XVS suffix) for which
10310 the size can be read in the parallel XVZ variable.
10312 In the case of an array of an unconstrained element type, the compiler
10313 wraps the array element inside a private PAD type. This type should not
10314 be shown to the user, and must be "unwrap"'ed before printing. Note
10315 that we also use the adjective "aligner" in our code to designate
10316 these wrapper types.
10318 In some cases, the size allocated for each element is statically
10319 known. In that case, the PAD type already has the correct size,
10320 and the array element should remain unfixed.
10322 But there are cases when this size is not statically known.
10323 For instance, assuming that "Five" is an integer variable:
10325 type Dynamic is array (1 .. Five) of Integer;
10326 type Wrapper (Has_Length : Boolean := False) is record
10329 when True => Length : Integer;
10330 when False => null;
10333 type Wrapper_Array is array (1 .. 2) of Wrapper;
10335 Hello : Wrapper_Array := (others => (Has_Length => True,
10336 Data => (others => 17),
10340 The debugging info would describe variable Hello as being an
10341 array of a PAD type. The size of that PAD type is not statically
10342 known, but can be determined using a parallel XVZ variable.
10343 In that case, a copy of the PAD type with the correct size should
10344 be used for the fixed array.
10346 3. ``Fixing'' record type objects:
10347 ----------------------------------
10349 Things are slightly different from arrays in the case of dynamic
10350 record types. In this case, in order to compute the associated
10351 fixed type, we need to determine the size and offset of each of
10352 its components. This, in turn, requires us to compute the fixed
10353 type of each of these components.
10355 Consider for instance the example:
10357 type Bounded_String (Max_Size : Natural) is record
10358 Str : String (1 .. Max_Size);
10361 My_String : Bounded_String (Max_Size => 10);
10363 In that case, the position of field "Length" depends on the size
10364 of field Str, which itself depends on the value of the Max_Size
10365 discriminant. In order to fix the type of variable My_String,
10366 we need to fix the type of field Str. Therefore, fixing a variant
10367 record requires us to fix each of its components.
10369 However, if a component does not have a dynamic size, the component
10370 should not be fixed. In particular, fields that use a PAD type
10371 should not fixed. Here is an example where this might happen
10372 (assuming type Rec above):
10374 type Container (Big : Boolean) is record
10378 when True => Another : Integer;
10379 when False => null;
10382 My_Container : Container := (Big => False,
10383 First => (Empty => True),
10386 In that example, the compiler creates a PAD type for component First,
10387 whose size is constant, and then positions the component After just
10388 right after it. The offset of component After is therefore constant
10391 The debugger computes the position of each field based on an algorithm
10392 that uses, among other things, the actual position and size of the field
10393 preceding it. Let's now imagine that the user is trying to print
10394 the value of My_Container. If the type fixing was recursive, we would
10395 end up computing the offset of field After based on the size of the
10396 fixed version of field First. And since in our example First has
10397 only one actual field, the size of the fixed type is actually smaller
10398 than the amount of space allocated to that field, and thus we would
10399 compute the wrong offset of field After.
10401 To make things more complicated, we need to watch out for dynamic
10402 components of variant records (identified by the ___XVL suffix in
10403 the component name). Even if the target type is a PAD type, the size
10404 of that type might not be statically known. So the PAD type needs
10405 to be unwrapped and the resulting type needs to be fixed. Otherwise,
10406 we might end up with the wrong size for our component. This can be
10407 observed with the following type declarations:
10409 type Octal is new Integer range 0 .. 7;
10410 type Octal_Array is array (Positive range <>) of Octal;
10411 pragma Pack (Octal_Array);
10413 type Octal_Buffer (Size : Positive) is record
10414 Buffer : Octal_Array (1 .. Size);
10418 In that case, Buffer is a PAD type whose size is unset and needs
10419 to be computed by fixing the unwrapped type.
10421 4. When to ``Fix'' un-``Fixed'' sub-elements of an entity:
10422 ----------------------------------------------------------
10424 Lastly, when should the sub-elements of an entity that remained unfixed
10425 thus far, be actually fixed?
10427 The answer is: Only when referencing that element. For instance
10428 when selecting one component of a record, this specific component
10429 should be fixed at that point in time. Or when printing the value
10430 of a record, each component should be fixed before its value gets
10431 printed. Similarly for arrays, the element of the array should be
10432 fixed when printing each element of the array, or when extracting
10433 one element out of that array. On the other hand, fixing should
10434 not be performed on the elements when taking a slice of an array!
10436 Note that one of the side-effects of miscomputing the offset and
10437 size of each field is that we end up also miscomputing the size
10438 of the containing type. This can have adverse results when computing
10439 the value of an entity. GDB fetches the value of an entity based
10440 on the size of its type, and thus a wrong size causes GDB to fetch
10441 the wrong amount of memory. In the case where the computed size is
10442 too small, GDB fetches too little data to print the value of our
10443 entiry. Results in this case as unpredicatble, as we usually read
10444 past the buffer containing the data =:-o. */
10446 /* Implement the evaluate_exp routine in the exp_descriptor structure
10447 for the Ada language. */
10449 static struct value *
10450 ada_evaluate_subexp (struct type *expect_type, struct expression *exp,
10451 int *pos, enum noside noside)
10453 enum exp_opcode op;
10457 struct value *arg1 = NULL, *arg2 = NULL, *arg3;
10460 struct value **argvec;
10464 op = exp->elts[pc].opcode;
10470 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
10472 if (noside == EVAL_NORMAL)
10473 arg1 = unwrap_value (arg1);
10475 /* If evaluating an OP_DOUBLE and an EXPECT_TYPE was provided,
10476 then we need to perform the conversion manually, because
10477 evaluate_subexp_standard doesn't do it. This conversion is
10478 necessary in Ada because the different kinds of float/fixed
10479 types in Ada have different representations.
10481 Similarly, we need to perform the conversion from OP_LONG
10483 if ((op == OP_DOUBLE || op == OP_LONG) && expect_type != NULL)
10484 arg1 = ada_value_cast (expect_type, arg1, noside);
10490 struct value *result;
10493 result = evaluate_subexp_standard (expect_type, exp, pos, noside);
10494 /* The result type will have code OP_STRING, bashed there from
10495 OP_ARRAY. Bash it back. */
10496 if (TYPE_CODE (value_type (result)) == TYPE_CODE_STRING)
10497 TYPE_CODE (value_type (result)) = TYPE_CODE_ARRAY;
10503 type = exp->elts[pc + 1].type;
10504 arg1 = evaluate_subexp (type, exp, pos, noside);
10505 if (noside == EVAL_SKIP)
10507 arg1 = ada_value_cast (type, arg1, noside);
10512 type = exp->elts[pc + 1].type;
10513 return ada_evaluate_subexp (type, exp, pos, noside);
10516 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10517 if (exp->elts[*pos].opcode == OP_AGGREGATE)
10519 arg1 = assign_aggregate (arg1, arg1, exp, pos, noside);
10520 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
10522 return ada_value_assign (arg1, arg1);
10524 /* Force the evaluation of the rhs ARG2 to the type of the lhs ARG1,
10525 except if the lhs of our assignment is a convenience variable.
10526 In the case of assigning to a convenience variable, the lhs
10527 should be exactly the result of the evaluation of the rhs. */
10528 type = value_type (arg1);
10529 if (VALUE_LVAL (arg1) == lval_internalvar)
10531 arg2 = evaluate_subexp (type, exp, pos, noside);
10532 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
10534 if (ada_is_fixed_point_type (value_type (arg1)))
10535 arg2 = cast_to_fixed (value_type (arg1), arg2);
10536 else if (ada_is_fixed_point_type (value_type (arg2)))
10538 (_("Fixed-point values must be assigned to fixed-point variables"));
10540 arg2 = coerce_for_assign (value_type (arg1), arg2);
10541 return ada_value_assign (arg1, arg2);
10544 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
10545 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
10546 if (noside == EVAL_SKIP)
10548 if (TYPE_CODE (value_type (arg1)) == TYPE_CODE_PTR)
10549 return (value_from_longest
10550 (value_type (arg1),
10551 value_as_long (arg1) + value_as_long (arg2)));
10552 if (TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR)
10553 return (value_from_longest
10554 (value_type (arg2),
10555 value_as_long (arg1) + value_as_long (arg2)));
10556 if ((ada_is_fixed_point_type (value_type (arg1))
10557 || ada_is_fixed_point_type (value_type (arg2)))
10558 && value_type (arg1) != value_type (arg2))
10559 error (_("Operands of fixed-point addition must have the same type"));
10560 /* Do the addition, and cast the result to the type of the first
10561 argument. We cannot cast the result to a reference type, so if
10562 ARG1 is a reference type, find its underlying type. */
10563 type = value_type (arg1);
10564 while (TYPE_CODE (type) == TYPE_CODE_REF)
10565 type = TYPE_TARGET_TYPE (type);
10566 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
10567 return value_cast (type, value_binop (arg1, arg2, BINOP_ADD));
10570 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
10571 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
10572 if (noside == EVAL_SKIP)
10574 if (TYPE_CODE (value_type (arg1)) == TYPE_CODE_PTR)
10575 return (value_from_longest
10576 (value_type (arg1),
10577 value_as_long (arg1) - value_as_long (arg2)));
10578 if (TYPE_CODE (value_type (arg2)) == TYPE_CODE_PTR)
10579 return (value_from_longest
10580 (value_type (arg2),
10581 value_as_long (arg1) - value_as_long (arg2)));
10582 if ((ada_is_fixed_point_type (value_type (arg1))
10583 || ada_is_fixed_point_type (value_type (arg2)))
10584 && value_type (arg1) != value_type (arg2))
10585 error (_("Operands of fixed-point subtraction "
10586 "must have the same type"));
10587 /* Do the substraction, and cast the result to the type of the first
10588 argument. We cannot cast the result to a reference type, so if
10589 ARG1 is a reference type, find its underlying type. */
10590 type = value_type (arg1);
10591 while (TYPE_CODE (type) == TYPE_CODE_REF)
10592 type = TYPE_TARGET_TYPE (type);
10593 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
10594 return value_cast (type, value_binop (arg1, arg2, BINOP_SUB));
10600 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10601 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10602 if (noside == EVAL_SKIP)
10604 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
10606 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
10607 return value_zero (value_type (arg1), not_lval);
10611 type = builtin_type (exp->gdbarch)->builtin_double;
10612 if (ada_is_fixed_point_type (value_type (arg1)))
10613 arg1 = cast_from_fixed (type, arg1);
10614 if (ada_is_fixed_point_type (value_type (arg2)))
10615 arg2 = cast_from_fixed (type, arg2);
10616 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
10617 return ada_value_binop (arg1, arg2, op);
10621 case BINOP_NOTEQUAL:
10622 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10623 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
10624 if (noside == EVAL_SKIP)
10626 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10630 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
10631 tem = ada_value_equal (arg1, arg2);
10633 if (op == BINOP_NOTEQUAL)
10635 type = language_bool_type (exp->language_defn, exp->gdbarch);
10636 return value_from_longest (type, (LONGEST) tem);
10639 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10640 if (noside == EVAL_SKIP)
10642 else if (ada_is_fixed_point_type (value_type (arg1)))
10643 return value_cast (value_type (arg1), value_neg (arg1));
10646 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
10647 return value_neg (arg1);
10650 case BINOP_LOGICAL_AND:
10651 case BINOP_LOGICAL_OR:
10652 case UNOP_LOGICAL_NOT:
10657 val = evaluate_subexp_standard (expect_type, exp, pos, noside);
10658 type = language_bool_type (exp->language_defn, exp->gdbarch);
10659 return value_cast (type, val);
10662 case BINOP_BITWISE_AND:
10663 case BINOP_BITWISE_IOR:
10664 case BINOP_BITWISE_XOR:
10668 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
10670 val = evaluate_subexp_standard (expect_type, exp, pos, noside);
10672 return value_cast (value_type (arg1), val);
10678 if (noside == EVAL_SKIP)
10684 if (SYMBOL_DOMAIN (exp->elts[pc + 2].symbol) == UNDEF_DOMAIN)
10685 /* Only encountered when an unresolved symbol occurs in a
10686 context other than a function call, in which case, it is
10688 error (_("Unexpected unresolved symbol, %s, during evaluation"),
10689 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
10691 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10693 type = static_unwrap_type (SYMBOL_TYPE (exp->elts[pc + 2].symbol));
10694 /* Check to see if this is a tagged type. We also need to handle
10695 the case where the type is a reference to a tagged type, but
10696 we have to be careful to exclude pointers to tagged types.
10697 The latter should be shown as usual (as a pointer), whereas
10698 a reference should mostly be transparent to the user. */
10699 if (ada_is_tagged_type (type, 0)
10700 || (TYPE_CODE (type) == TYPE_CODE_REF
10701 && ada_is_tagged_type (TYPE_TARGET_TYPE (type), 0)))
10703 /* Tagged types are a little special in the fact that the real
10704 type is dynamic and can only be determined by inspecting the
10705 object's tag. This means that we need to get the object's
10706 value first (EVAL_NORMAL) and then extract the actual object
10709 Note that we cannot skip the final step where we extract
10710 the object type from its tag, because the EVAL_NORMAL phase
10711 results in dynamic components being resolved into fixed ones.
10712 This can cause problems when trying to print the type
10713 description of tagged types whose parent has a dynamic size:
10714 We use the type name of the "_parent" component in order
10715 to print the name of the ancestor type in the type description.
10716 If that component had a dynamic size, the resolution into
10717 a fixed type would result in the loss of that type name,
10718 thus preventing us from printing the name of the ancestor
10719 type in the type description. */
10720 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL);
10722 if (TYPE_CODE (type) != TYPE_CODE_REF)
10724 struct type *actual_type;
10726 actual_type = type_from_tag (ada_value_tag (arg1));
10727 if (actual_type == NULL)
10728 /* If, for some reason, we were unable to determine
10729 the actual type from the tag, then use the static
10730 approximation that we just computed as a fallback.
10731 This can happen if the debugging information is
10732 incomplete, for instance. */
10733 actual_type = type;
10734 return value_zero (actual_type, not_lval);
10738 /* In the case of a ref, ada_coerce_ref takes care
10739 of determining the actual type. But the evaluation
10740 should return a ref as it should be valid to ask
10741 for its address; so rebuild a ref after coerce. */
10742 arg1 = ada_coerce_ref (arg1);
10743 return value_ref (arg1);
10747 /* Records and unions for which GNAT encodings have been
10748 generated need to be statically fixed as well.
10749 Otherwise, non-static fixing produces a type where
10750 all dynamic properties are removed, which prevents "ptype"
10751 from being able to completely describe the type.
10752 For instance, a case statement in a variant record would be
10753 replaced by the relevant components based on the actual
10754 value of the discriminants. */
10755 if ((TYPE_CODE (type) == TYPE_CODE_STRUCT
10756 && dynamic_template_type (type) != NULL)
10757 || (TYPE_CODE (type) == TYPE_CODE_UNION
10758 && ada_find_parallel_type (type, "___XVU") != NULL))
10761 return value_zero (to_static_fixed_type (type), not_lval);
10765 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
10766 return ada_to_fixed_value (arg1);
10771 /* Allocate arg vector, including space for the function to be
10772 called in argvec[0] and a terminating NULL. */
10773 nargs = longest_to_int (exp->elts[pc + 1].longconst);
10774 argvec = XALLOCAVEC (struct value *, nargs + 2);
10776 if (exp->elts[*pos].opcode == OP_VAR_VALUE
10777 && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN)
10778 error (_("Unexpected unresolved symbol, %s, during evaluation"),
10779 SYMBOL_PRINT_NAME (exp->elts[pc + 5].symbol));
10782 for (tem = 0; tem <= nargs; tem += 1)
10783 argvec[tem] = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10786 if (noside == EVAL_SKIP)
10790 if (ada_is_constrained_packed_array_type
10791 (desc_base_type (value_type (argvec[0]))))
10792 argvec[0] = ada_coerce_to_simple_array (argvec[0]);
10793 else if (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_ARRAY
10794 && TYPE_FIELD_BITSIZE (value_type (argvec[0]), 0) != 0)
10795 /* This is a packed array that has already been fixed, and
10796 therefore already coerced to a simple array. Nothing further
10799 else if (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_REF)
10801 /* Make sure we dereference references so that all the code below
10802 feels like it's really handling the referenced value. Wrapping
10803 types (for alignment) may be there, so make sure we strip them as
10805 argvec[0] = ada_to_fixed_value (coerce_ref (argvec[0]));
10807 else if (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_ARRAY
10808 && VALUE_LVAL (argvec[0]) == lval_memory)
10809 argvec[0] = value_addr (argvec[0]);
10811 type = ada_check_typedef (value_type (argvec[0]));
10813 /* Ada allows us to implicitly dereference arrays when subscripting
10814 them. So, if this is an array typedef (encoding use for array
10815 access types encoded as fat pointers), strip it now. */
10816 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
10817 type = ada_typedef_target_type (type);
10819 if (TYPE_CODE (type) == TYPE_CODE_PTR)
10821 switch (TYPE_CODE (ada_check_typedef (TYPE_TARGET_TYPE (type))))
10823 case TYPE_CODE_FUNC:
10824 type = ada_check_typedef (TYPE_TARGET_TYPE (type));
10826 case TYPE_CODE_ARRAY:
10828 case TYPE_CODE_STRUCT:
10829 if (noside != EVAL_AVOID_SIDE_EFFECTS)
10830 argvec[0] = ada_value_ind (argvec[0]);
10831 type = ada_check_typedef (TYPE_TARGET_TYPE (type));
10834 error (_("cannot subscript or call something of type `%s'"),
10835 ada_type_name (value_type (argvec[0])));
10840 switch (TYPE_CODE (type))
10842 case TYPE_CODE_FUNC:
10843 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10845 struct type *rtype = TYPE_TARGET_TYPE (type);
10847 if (TYPE_GNU_IFUNC (type))
10848 return allocate_value (TYPE_TARGET_TYPE (rtype));
10849 return allocate_value (rtype);
10851 return call_function_by_hand (argvec[0], nargs, argvec + 1);
10852 case TYPE_CODE_INTERNAL_FUNCTION:
10853 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10854 /* We don't know anything about what the internal
10855 function might return, but we have to return
10857 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
10860 return call_internal_function (exp->gdbarch, exp->language_defn,
10861 argvec[0], nargs, argvec + 1);
10863 case TYPE_CODE_STRUCT:
10867 arity = ada_array_arity (type);
10868 type = ada_array_element_type (type, nargs);
10870 error (_("cannot subscript or call a record"));
10871 if (arity != nargs)
10872 error (_("wrong number of subscripts; expecting %d"), arity);
10873 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10874 return value_zero (ada_aligned_type (type), lval_memory);
10876 unwrap_value (ada_value_subscript
10877 (argvec[0], nargs, argvec + 1));
10879 case TYPE_CODE_ARRAY:
10880 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10882 type = ada_array_element_type (type, nargs);
10884 error (_("element type of array unknown"));
10886 return value_zero (ada_aligned_type (type), lval_memory);
10889 unwrap_value (ada_value_subscript
10890 (ada_coerce_to_simple_array (argvec[0]),
10891 nargs, argvec + 1));
10892 case TYPE_CODE_PTR: /* Pointer to array */
10893 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10895 type = to_fixed_array_type (TYPE_TARGET_TYPE (type), NULL, 1);
10896 type = ada_array_element_type (type, nargs);
10898 error (_("element type of array unknown"));
10900 return value_zero (ada_aligned_type (type), lval_memory);
10903 unwrap_value (ada_value_ptr_subscript (argvec[0],
10904 nargs, argvec + 1));
10907 error (_("Attempt to index or call something other than an "
10908 "array or function"));
10913 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10914 struct value *low_bound_val =
10915 evaluate_subexp (NULL_TYPE, exp, pos, noside);
10916 struct value *high_bound_val =
10917 evaluate_subexp (NULL_TYPE, exp, pos, noside);
10919 LONGEST high_bound;
10921 low_bound_val = coerce_ref (low_bound_val);
10922 high_bound_val = coerce_ref (high_bound_val);
10923 low_bound = value_as_long (low_bound_val);
10924 high_bound = value_as_long (high_bound_val);
10926 if (noside == EVAL_SKIP)
10929 /* If this is a reference to an aligner type, then remove all
10931 if (TYPE_CODE (value_type (array)) == TYPE_CODE_REF
10932 && ada_is_aligner_type (TYPE_TARGET_TYPE (value_type (array))))
10933 TYPE_TARGET_TYPE (value_type (array)) =
10934 ada_aligned_type (TYPE_TARGET_TYPE (value_type (array)));
10936 if (ada_is_constrained_packed_array_type (value_type (array)))
10937 error (_("cannot slice a packed array"));
10939 /* If this is a reference to an array or an array lvalue,
10940 convert to a pointer. */
10941 if (TYPE_CODE (value_type (array)) == TYPE_CODE_REF
10942 || (TYPE_CODE (value_type (array)) == TYPE_CODE_ARRAY
10943 && VALUE_LVAL (array) == lval_memory))
10944 array = value_addr (array);
10946 if (noside == EVAL_AVOID_SIDE_EFFECTS
10947 && ada_is_array_descriptor_type (ada_check_typedef
10948 (value_type (array))))
10949 return empty_array (ada_type_of_array (array, 0), low_bound);
10951 array = ada_coerce_to_simple_array_ptr (array);
10953 /* If we have more than one level of pointer indirection,
10954 dereference the value until we get only one level. */
10955 while (TYPE_CODE (value_type (array)) == TYPE_CODE_PTR
10956 && (TYPE_CODE (TYPE_TARGET_TYPE (value_type (array)))
10958 array = value_ind (array);
10960 /* Make sure we really do have an array type before going further,
10961 to avoid a SEGV when trying to get the index type or the target
10962 type later down the road if the debug info generated by
10963 the compiler is incorrect or incomplete. */
10964 if (!ada_is_simple_array_type (value_type (array)))
10965 error (_("cannot take slice of non-array"));
10967 if (TYPE_CODE (ada_check_typedef (value_type (array)))
10970 struct type *type0 = ada_check_typedef (value_type (array));
10972 if (high_bound < low_bound || noside == EVAL_AVOID_SIDE_EFFECTS)
10973 return empty_array (TYPE_TARGET_TYPE (type0), low_bound);
10976 struct type *arr_type0 =
10977 to_fixed_array_type (TYPE_TARGET_TYPE (type0), NULL, 1);
10979 return ada_value_slice_from_ptr (array, arr_type0,
10980 longest_to_int (low_bound),
10981 longest_to_int (high_bound));
10984 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
10986 else if (high_bound < low_bound)
10987 return empty_array (value_type (array), low_bound);
10989 return ada_value_slice (array, longest_to_int (low_bound),
10990 longest_to_int (high_bound));
10993 case UNOP_IN_RANGE:
10995 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10996 type = check_typedef (exp->elts[pc + 1].type);
10998 if (noside == EVAL_SKIP)
11001 switch (TYPE_CODE (type))
11004 lim_warning (_("Membership test incompletely implemented; "
11005 "always returns true"));
11006 type = language_bool_type (exp->language_defn, exp->gdbarch);
11007 return value_from_longest (type, (LONGEST) 1);
11009 case TYPE_CODE_RANGE:
11010 arg2 = value_from_longest (type, TYPE_LOW_BOUND (type));
11011 arg3 = value_from_longest (type, TYPE_HIGH_BOUND (type));
11012 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
11013 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3);
11014 type = language_bool_type (exp->language_defn, exp->gdbarch);
11016 value_from_longest (type,
11017 (value_less (arg1, arg3)
11018 || value_equal (arg1, arg3))
11019 && (value_less (arg2, arg1)
11020 || value_equal (arg2, arg1)));
11023 case BINOP_IN_BOUNDS:
11025 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11026 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11028 if (noside == EVAL_SKIP)
11031 if (noside == EVAL_AVOID_SIDE_EFFECTS)
11033 type = language_bool_type (exp->language_defn, exp->gdbarch);
11034 return value_zero (type, not_lval);
11037 tem = longest_to_int (exp->elts[pc + 1].longconst);
11039 type = ada_index_type (value_type (arg2), tem, "range");
11041 type = value_type (arg1);
11043 arg3 = value_from_longest (type, ada_array_bound (arg2, tem, 1));
11044 arg2 = value_from_longest (type, ada_array_bound (arg2, tem, 0));
11046 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
11047 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3);
11048 type = language_bool_type (exp->language_defn, exp->gdbarch);
11050 value_from_longest (type,
11051 (value_less (arg1, arg3)
11052 || value_equal (arg1, arg3))
11053 && (value_less (arg2, arg1)
11054 || value_equal (arg2, arg1)));
11056 case TERNOP_IN_RANGE:
11057 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11058 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11059 arg3 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11061 if (noside == EVAL_SKIP)
11064 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
11065 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3);
11066 type = language_bool_type (exp->language_defn, exp->gdbarch);
11068 value_from_longest (type,
11069 (value_less (arg1, arg3)
11070 || value_equal (arg1, arg3))
11071 && (value_less (arg2, arg1)
11072 || value_equal (arg2, arg1)));
11076 case OP_ATR_LENGTH:
11078 struct type *type_arg;
11080 if (exp->elts[*pos].opcode == OP_TYPE)
11082 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
11084 type_arg = check_typedef (exp->elts[pc + 2].type);
11088 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11092 if (exp->elts[*pos].opcode != OP_LONG)
11093 error (_("Invalid operand to '%s"), ada_attribute_name (op));
11094 tem = longest_to_int (exp->elts[*pos + 2].longconst);
11097 if (noside == EVAL_SKIP)
11100 if (type_arg == NULL)
11102 arg1 = ada_coerce_ref (arg1);
11104 if (ada_is_constrained_packed_array_type (value_type (arg1)))
11105 arg1 = ada_coerce_to_simple_array (arg1);
11107 if (op == OP_ATR_LENGTH)
11108 type = builtin_type (exp->gdbarch)->builtin_int;
11111 type = ada_index_type (value_type (arg1), tem,
11112 ada_attribute_name (op));
11114 type = builtin_type (exp->gdbarch)->builtin_int;
11117 if (noside == EVAL_AVOID_SIDE_EFFECTS)
11118 return allocate_value (type);
11122 default: /* Should never happen. */
11123 error (_("unexpected attribute encountered"));
11125 return value_from_longest
11126 (type, ada_array_bound (arg1, tem, 0));
11128 return value_from_longest
11129 (type, ada_array_bound (arg1, tem, 1));
11130 case OP_ATR_LENGTH:
11131 return value_from_longest
11132 (type, ada_array_length (arg1, tem));
11135 else if (discrete_type_p (type_arg))
11137 struct type *range_type;
11138 const char *name = ada_type_name (type_arg);
11141 if (name != NULL && TYPE_CODE (type_arg) != TYPE_CODE_ENUM)
11142 range_type = to_fixed_range_type (type_arg, NULL);
11143 if (range_type == NULL)
11144 range_type = type_arg;
11148 error (_("unexpected attribute encountered"));
11150 return value_from_longest
11151 (range_type, ada_discrete_type_low_bound (range_type));
11153 return value_from_longest
11154 (range_type, ada_discrete_type_high_bound (range_type));
11155 case OP_ATR_LENGTH:
11156 error (_("the 'length attribute applies only to array types"));
11159 else if (TYPE_CODE (type_arg) == TYPE_CODE_FLT)
11160 error (_("unimplemented type attribute"));
11165 if (ada_is_constrained_packed_array_type (type_arg))
11166 type_arg = decode_constrained_packed_array_type (type_arg);
11168 if (op == OP_ATR_LENGTH)
11169 type = builtin_type (exp->gdbarch)->builtin_int;
11172 type = ada_index_type (type_arg, tem, ada_attribute_name (op));
11174 type = builtin_type (exp->gdbarch)->builtin_int;
11177 if (noside == EVAL_AVOID_SIDE_EFFECTS)
11178 return allocate_value (type);
11183 error (_("unexpected attribute encountered"));
11185 low = ada_array_bound_from_type (type_arg, tem, 0);
11186 return value_from_longest (type, low);
11188 high = ada_array_bound_from_type (type_arg, tem, 1);
11189 return value_from_longest (type, high);
11190 case OP_ATR_LENGTH:
11191 low = ada_array_bound_from_type (type_arg, tem, 0);
11192 high = ada_array_bound_from_type (type_arg, tem, 1);
11193 return value_from_longest (type, high - low + 1);
11199 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11200 if (noside == EVAL_SKIP)
11203 if (noside == EVAL_AVOID_SIDE_EFFECTS)
11204 return value_zero (ada_tag_type (arg1), not_lval);
11206 return ada_value_tag (arg1);
11210 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
11211 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11212 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11213 if (noside == EVAL_SKIP)
11215 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
11216 return value_zero (value_type (arg1), not_lval);
11219 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
11220 return value_binop (arg1, arg2,
11221 op == OP_ATR_MIN ? BINOP_MIN : BINOP_MAX);
11224 case OP_ATR_MODULUS:
11226 struct type *type_arg = check_typedef (exp->elts[pc + 2].type);
11228 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
11229 if (noside == EVAL_SKIP)
11232 if (!ada_is_modular_type (type_arg))
11233 error (_("'modulus must be applied to modular type"));
11235 return value_from_longest (TYPE_TARGET_TYPE (type_arg),
11236 ada_modulus (type_arg));
11241 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
11242 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11243 if (noside == EVAL_SKIP)
11245 type = builtin_type (exp->gdbarch)->builtin_int;
11246 if (noside == EVAL_AVOID_SIDE_EFFECTS)
11247 return value_zero (type, not_lval);
11249 return value_pos_atr (type, arg1);
11252 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11253 type = value_type (arg1);
11255 /* If the argument is a reference, then dereference its type, since
11256 the user is really asking for the size of the actual object,
11257 not the size of the pointer. */
11258 if (TYPE_CODE (type) == TYPE_CODE_REF)
11259 type = TYPE_TARGET_TYPE (type);
11261 if (noside == EVAL_SKIP)
11263 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
11264 return value_zero (builtin_type (exp->gdbarch)->builtin_int, not_lval);
11266 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int,
11267 TARGET_CHAR_BIT * TYPE_LENGTH (type));
11270 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
11271 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11272 type = exp->elts[pc + 2].type;
11273 if (noside == EVAL_SKIP)
11275 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
11276 return value_zero (type, not_lval);
11278 return value_val_atr (type, arg1);
11281 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11282 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11283 if (noside == EVAL_SKIP)
11285 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
11286 return value_zero (value_type (arg1), not_lval);
11289 /* For integer exponentiation operations,
11290 only promote the first argument. */
11291 if (is_integral_type (value_type (arg2)))
11292 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
11294 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
11296 return value_binop (arg1, arg2, op);
11300 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11301 if (noside == EVAL_SKIP)
11307 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11308 if (noside == EVAL_SKIP)
11310 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
11311 if (value_less (arg1, value_zero (value_type (arg1), not_lval)))
11312 return value_neg (arg1);
11317 preeval_pos = *pos;
11318 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11319 if (noside == EVAL_SKIP)
11321 type = ada_check_typedef (value_type (arg1));
11322 if (noside == EVAL_AVOID_SIDE_EFFECTS)
11324 if (ada_is_array_descriptor_type (type))
11325 /* GDB allows dereferencing GNAT array descriptors. */
11327 struct type *arrType = ada_type_of_array (arg1, 0);
11329 if (arrType == NULL)
11330 error (_("Attempt to dereference null array pointer."));
11331 return value_at_lazy (arrType, 0);
11333 else if (TYPE_CODE (type) == TYPE_CODE_PTR
11334 || TYPE_CODE (type) == TYPE_CODE_REF
11335 /* In C you can dereference an array to get the 1st elt. */
11336 || TYPE_CODE (type) == TYPE_CODE_ARRAY)
11338 /* As mentioned in the OP_VAR_VALUE case, tagged types can
11339 only be determined by inspecting the object's tag.
11340 This means that we need to evaluate completely the
11341 expression in order to get its type. */
11343 if ((TYPE_CODE (type) == TYPE_CODE_REF
11344 || TYPE_CODE (type) == TYPE_CODE_PTR)
11345 && ada_is_tagged_type (TYPE_TARGET_TYPE (type), 0))
11347 arg1 = evaluate_subexp (NULL_TYPE, exp, &preeval_pos,
11349 type = value_type (ada_value_ind (arg1));
11353 type = to_static_fixed_type
11355 (ada_check_typedef (TYPE_TARGET_TYPE (type))));
11357 ada_ensure_varsize_limit (type);
11358 return value_zero (type, lval_memory);
11360 else if (TYPE_CODE (type) == TYPE_CODE_INT)
11362 /* GDB allows dereferencing an int. */
11363 if (expect_type == NULL)
11364 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
11369 to_static_fixed_type (ada_aligned_type (expect_type));
11370 return value_zero (expect_type, lval_memory);
11374 error (_("Attempt to take contents of a non-pointer value."));
11376 arg1 = ada_coerce_ref (arg1); /* FIXME: What is this for?? */
11377 type = ada_check_typedef (value_type (arg1));
11379 if (TYPE_CODE (type) == TYPE_CODE_INT)
11380 /* GDB allows dereferencing an int. If we were given
11381 the expect_type, then use that as the target type.
11382 Otherwise, assume that the target type is an int. */
11384 if (expect_type != NULL)
11385 return ada_value_ind (value_cast (lookup_pointer_type (expect_type),
11388 return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int,
11389 (CORE_ADDR) value_as_address (arg1));
11392 if (ada_is_array_descriptor_type (type))
11393 /* GDB allows dereferencing GNAT array descriptors. */
11394 return ada_coerce_to_simple_array (arg1);
11396 return ada_value_ind (arg1);
11398 case STRUCTOP_STRUCT:
11399 tem = longest_to_int (exp->elts[pc + 1].longconst);
11400 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
11401 preeval_pos = *pos;
11402 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
11403 if (noside == EVAL_SKIP)
11405 if (noside == EVAL_AVOID_SIDE_EFFECTS)
11407 struct type *type1 = value_type (arg1);
11409 if (ada_is_tagged_type (type1, 1))
11411 type = ada_lookup_struct_elt_type (type1,
11412 &exp->elts[pc + 2].string,
11415 /* If the field is not found, check if it exists in the
11416 extension of this object's type. This means that we
11417 need to evaluate completely the expression. */
11421 arg1 = evaluate_subexp (NULL_TYPE, exp, &preeval_pos,
11423 arg1 = ada_value_struct_elt (arg1,
11424 &exp->elts[pc + 2].string,
11426 arg1 = unwrap_value (arg1);
11427 type = value_type (ada_to_fixed_value (arg1));
11432 ada_lookup_struct_elt_type (type1, &exp->elts[pc + 2].string, 1,
11435 return value_zero (ada_aligned_type (type), lval_memory);
11439 arg1 = ada_value_struct_elt (arg1, &exp->elts[pc + 2].string, 0);
11440 arg1 = unwrap_value (arg1);
11441 return ada_to_fixed_value (arg1);
11445 /* The value is not supposed to be used. This is here to make it
11446 easier to accommodate expressions that contain types. */
11448 if (noside == EVAL_SKIP)
11450 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
11451 return allocate_value (exp->elts[pc + 1].type);
11453 error (_("Attempt to use a type name as an expression"));
11458 case OP_DISCRETE_RANGE:
11459 case OP_POSITIONAL:
11461 if (noside == EVAL_NORMAL)
11465 error (_("Undefined name, ambiguous name, or renaming used in "
11466 "component association: %s."), &exp->elts[pc+2].string);
11468 error (_("Aggregates only allowed on the right of an assignment"));
11470 internal_error (__FILE__, __LINE__,
11471 _("aggregate apparently mangled"));
11474 ada_forward_operator_length (exp, pc, &oplen, &nargs);
11476 for (tem = 0; tem < nargs; tem += 1)
11477 ada_evaluate_subexp (NULL, exp, pos, noside);
11482 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
11488 /* If TYPE encodes an Ada fixed-point type, return the suffix of the
11489 type name that encodes the 'small and 'delta information.
11490 Otherwise, return NULL. */
11492 static const char *
11493 fixed_type_info (struct type *type)
11495 const char *name = ada_type_name (type);
11496 enum type_code code = (type == NULL) ? TYPE_CODE_UNDEF : TYPE_CODE (type);
11498 if ((code == TYPE_CODE_INT || code == TYPE_CODE_RANGE) && name != NULL)
11500 const char *tail = strstr (name, "___XF_");
11507 else if (code == TYPE_CODE_RANGE && TYPE_TARGET_TYPE (type) != type)
11508 return fixed_type_info (TYPE_TARGET_TYPE (type));
11513 /* Returns non-zero iff TYPE represents an Ada fixed-point type. */
11516 ada_is_fixed_point_type (struct type *type)
11518 return fixed_type_info (type) != NULL;
11521 /* Return non-zero iff TYPE represents a System.Address type. */
11524 ada_is_system_address_type (struct type *type)
11526 return (TYPE_NAME (type)
11527 && strcmp (TYPE_NAME (type), "system__address") == 0);
11530 /* Assuming that TYPE is the representation of an Ada fixed-point
11531 type, return its delta, or -1 if the type is malformed and the
11532 delta cannot be determined. */
11535 ada_delta (struct type *type)
11537 const char *encoding = fixed_type_info (type);
11540 /* Strictly speaking, num and den are encoded as integer. However,
11541 they may not fit into a long, and they will have to be converted
11542 to DOUBLEST anyway. So scan them as DOUBLEST. */
11543 if (sscanf (encoding, "_%" DOUBLEST_SCAN_FORMAT "_%" DOUBLEST_SCAN_FORMAT,
11550 /* Assuming that ada_is_fixed_point_type (TYPE), return the scaling
11551 factor ('SMALL value) associated with the type. */
11554 scaling_factor (struct type *type)
11556 const char *encoding = fixed_type_info (type);
11557 DOUBLEST num0, den0, num1, den1;
11560 /* Strictly speaking, num's and den's are encoded as integer. However,
11561 they may not fit into a long, and they will have to be converted
11562 to DOUBLEST anyway. So scan them as DOUBLEST. */
11563 n = sscanf (encoding,
11564 "_%" DOUBLEST_SCAN_FORMAT "_%" DOUBLEST_SCAN_FORMAT
11565 "_%" DOUBLEST_SCAN_FORMAT "_%" DOUBLEST_SCAN_FORMAT,
11566 &num0, &den0, &num1, &den1);
11571 return num1 / den1;
11573 return num0 / den0;
11577 /* Assuming that X is the representation of a value of fixed-point
11578 type TYPE, return its floating-point equivalent. */
11581 ada_fixed_to_float (struct type *type, LONGEST x)
11583 return (DOUBLEST) x *scaling_factor (type);
11586 /* The representation of a fixed-point value of type TYPE
11587 corresponding to the value X. */
11590 ada_float_to_fixed (struct type *type, DOUBLEST x)
11592 return (LONGEST) (x / scaling_factor (type) + 0.5);
11599 /* Scan STR beginning at position K for a discriminant name, and
11600 return the value of that discriminant field of DVAL in *PX. If
11601 PNEW_K is not null, put the position of the character beyond the
11602 name scanned in *PNEW_K. Return 1 if successful; return 0 and do
11603 not alter *PX and *PNEW_K if unsuccessful. */
11606 scan_discrim_bound (const char *str, int k, struct value *dval, LONGEST * px,
11609 static char *bound_buffer = NULL;
11610 static size_t bound_buffer_len = 0;
11611 const char *pstart, *pend, *bound;
11612 struct value *bound_val;
11614 if (dval == NULL || str == NULL || str[k] == '\0')
11618 pend = strstr (pstart, "__");
11622 k += strlen (bound);
11626 int len = pend - pstart;
11628 /* Strip __ and beyond. */
11629 GROW_VECT (bound_buffer, bound_buffer_len, len + 1);
11630 strncpy (bound_buffer, pstart, len);
11631 bound_buffer[len] = '\0';
11633 bound = bound_buffer;
11637 bound_val = ada_search_struct_field (bound, dval, 0, value_type (dval));
11638 if (bound_val == NULL)
11641 *px = value_as_long (bound_val);
11642 if (pnew_k != NULL)
11647 /* Value of variable named NAME in the current environment. If
11648 no such variable found, then if ERR_MSG is null, returns 0, and
11649 otherwise causes an error with message ERR_MSG. */
11651 static struct value *
11652 get_var_value (char *name, char *err_msg)
11654 struct block_symbol *syms;
11657 nsyms = ada_lookup_symbol_list (name, get_selected_block (0), VAR_DOMAIN,
11662 if (err_msg == NULL)
11665 error (("%s"), err_msg);
11668 return value_of_variable (syms[0].symbol, syms[0].block);
11671 /* Value of integer variable named NAME in the current environment. If
11672 no such variable found, returns 0, and sets *FLAG to 0. If
11673 successful, sets *FLAG to 1. */
11676 get_int_var_value (char *name, int *flag)
11678 struct value *var_val = get_var_value (name, 0);
11690 return value_as_long (var_val);
11695 /* Return a range type whose base type is that of the range type named
11696 NAME in the current environment, and whose bounds are calculated
11697 from NAME according to the GNAT range encoding conventions.
11698 Extract discriminant values, if needed, from DVAL. ORIG_TYPE is the
11699 corresponding range type from debug information; fall back to using it
11700 if symbol lookup fails. If a new type must be created, allocate it
11701 like ORIG_TYPE was. The bounds information, in general, is encoded
11702 in NAME, the base type given in the named range type. */
11704 static struct type *
11705 to_fixed_range_type (struct type *raw_type, struct value *dval)
11708 struct type *base_type;
11709 const char *subtype_info;
11711 gdb_assert (raw_type != NULL);
11712 gdb_assert (TYPE_NAME (raw_type) != NULL);
11714 if (TYPE_CODE (raw_type) == TYPE_CODE_RANGE)
11715 base_type = TYPE_TARGET_TYPE (raw_type);
11717 base_type = raw_type;
11719 name = TYPE_NAME (raw_type);
11720 subtype_info = strstr (name, "___XD");
11721 if (subtype_info == NULL)
11723 LONGEST L = ada_discrete_type_low_bound (raw_type);
11724 LONGEST U = ada_discrete_type_high_bound (raw_type);
11726 if (L < INT_MIN || U > INT_MAX)
11729 return create_static_range_type (alloc_type_copy (raw_type), raw_type,
11734 static char *name_buf = NULL;
11735 static size_t name_len = 0;
11736 int prefix_len = subtype_info - name;
11739 const char *bounds_str;
11742 GROW_VECT (name_buf, name_len, prefix_len + 5);
11743 strncpy (name_buf, name, prefix_len);
11744 name_buf[prefix_len] = '\0';
11747 bounds_str = strchr (subtype_info, '_');
11750 if (*subtype_info == 'L')
11752 if (!ada_scan_number (bounds_str, n, &L, &n)
11753 && !scan_discrim_bound (bounds_str, n, dval, &L, &n))
11755 if (bounds_str[n] == '_')
11757 else if (bounds_str[n] == '.') /* FIXME? SGI Workshop kludge. */
11765 strcpy (name_buf + prefix_len, "___L");
11766 L = get_int_var_value (name_buf, &ok);
11769 lim_warning (_("Unknown lower bound, using 1."));
11774 if (*subtype_info == 'U')
11776 if (!ada_scan_number (bounds_str, n, &U, &n)
11777 && !scan_discrim_bound (bounds_str, n, dval, &U, &n))
11784 strcpy (name_buf + prefix_len, "___U");
11785 U = get_int_var_value (name_buf, &ok);
11788 lim_warning (_("Unknown upper bound, using %ld."), (long) L);
11793 type = create_static_range_type (alloc_type_copy (raw_type),
11795 TYPE_NAME (type) = name;
11800 /* True iff NAME is the name of a range type. */
11803 ada_is_range_type_name (const char *name)
11805 return (name != NULL && strstr (name, "___XD"));
11809 /* Modular types */
11811 /* True iff TYPE is an Ada modular type. */
11814 ada_is_modular_type (struct type *type)
11816 struct type *subranged_type = get_base_type (type);
11818 return (subranged_type != NULL && TYPE_CODE (type) == TYPE_CODE_RANGE
11819 && TYPE_CODE (subranged_type) == TYPE_CODE_INT
11820 && TYPE_UNSIGNED (subranged_type));
11823 /* Assuming ada_is_modular_type (TYPE), the modulus of TYPE. */
11826 ada_modulus (struct type *type)
11828 return (ULONGEST) TYPE_HIGH_BOUND (type) + 1;
11832 /* Ada exception catchpoint support:
11833 ---------------------------------
11835 We support 3 kinds of exception catchpoints:
11836 . catchpoints on Ada exceptions
11837 . catchpoints on unhandled Ada exceptions
11838 . catchpoints on failed assertions
11840 Exceptions raised during failed assertions, or unhandled exceptions
11841 could perfectly be caught with the general catchpoint on Ada exceptions.
11842 However, we can easily differentiate these two special cases, and having
11843 the option to distinguish these two cases from the rest can be useful
11844 to zero-in on certain situations.
11846 Exception catchpoints are a specialized form of breakpoint,
11847 since they rely on inserting breakpoints inside known routines
11848 of the GNAT runtime. The implementation therefore uses a standard
11849 breakpoint structure of the BP_BREAKPOINT type, but with its own set
11852 Support in the runtime for exception catchpoints have been changed
11853 a few times already, and these changes affect the implementation
11854 of these catchpoints. In order to be able to support several
11855 variants of the runtime, we use a sniffer that will determine
11856 the runtime variant used by the program being debugged. */
11858 /* Ada's standard exceptions.
11860 The Ada 83 standard also defined Numeric_Error. But there so many
11861 situations where it was unclear from the Ada 83 Reference Manual
11862 (RM) whether Constraint_Error or Numeric_Error should be raised,
11863 that the ARG (Ada Rapporteur Group) eventually issued a Binding
11864 Interpretation saying that anytime the RM says that Numeric_Error
11865 should be raised, the implementation may raise Constraint_Error.
11866 Ada 95 went one step further and pretty much removed Numeric_Error
11867 from the list of standard exceptions (it made it a renaming of
11868 Constraint_Error, to help preserve compatibility when compiling
11869 an Ada83 compiler). As such, we do not include Numeric_Error from
11870 this list of standard exceptions. */
11872 static char *standard_exc[] = {
11873 "constraint_error",
11879 typedef CORE_ADDR (ada_unhandled_exception_name_addr_ftype) (void);
11881 /* A structure that describes how to support exception catchpoints
11882 for a given executable. */
11884 struct exception_support_info
11886 /* The name of the symbol to break on in order to insert
11887 a catchpoint on exceptions. */
11888 const char *catch_exception_sym;
11890 /* The name of the symbol to break on in order to insert
11891 a catchpoint on unhandled exceptions. */
11892 const char *catch_exception_unhandled_sym;
11894 /* The name of the symbol to break on in order to insert
11895 a catchpoint on failed assertions. */
11896 const char *catch_assert_sym;
11898 /* Assuming that the inferior just triggered an unhandled exception
11899 catchpoint, this function is responsible for returning the address
11900 in inferior memory where the name of that exception is stored.
11901 Return zero if the address could not be computed. */
11902 ada_unhandled_exception_name_addr_ftype *unhandled_exception_name_addr;
11905 static CORE_ADDR ada_unhandled_exception_name_addr (void);
11906 static CORE_ADDR ada_unhandled_exception_name_addr_from_raise (void);
11908 /* The following exception support info structure describes how to
11909 implement exception catchpoints with the latest version of the
11910 Ada runtime (as of 2007-03-06). */
11912 static const struct exception_support_info default_exception_support_info =
11914 "__gnat_debug_raise_exception", /* catch_exception_sym */
11915 "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */
11916 "__gnat_debug_raise_assert_failure", /* catch_assert_sym */
11917 ada_unhandled_exception_name_addr
11920 /* The following exception support info structure describes how to
11921 implement exception catchpoints with a slightly older version
11922 of the Ada runtime. */
11924 static const struct exception_support_info exception_support_info_fallback =
11926 "__gnat_raise_nodefer_with_msg", /* catch_exception_sym */
11927 "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */
11928 "system__assertions__raise_assert_failure", /* catch_assert_sym */
11929 ada_unhandled_exception_name_addr_from_raise
11932 /* Return nonzero if we can detect the exception support routines
11933 described in EINFO.
11935 This function errors out if an abnormal situation is detected
11936 (for instance, if we find the exception support routines, but
11937 that support is found to be incomplete). */
11940 ada_has_this_exception_support (const struct exception_support_info *einfo)
11942 struct symbol *sym;
11944 /* The symbol we're looking up is provided by a unit in the GNAT runtime
11945 that should be compiled with debugging information. As a result, we
11946 expect to find that symbol in the symtabs. */
11948 sym = standard_lookup (einfo->catch_exception_sym, NULL, VAR_DOMAIN);
11951 /* Perhaps we did not find our symbol because the Ada runtime was
11952 compiled without debugging info, or simply stripped of it.
11953 It happens on some GNU/Linux distributions for instance, where
11954 users have to install a separate debug package in order to get
11955 the runtime's debugging info. In that situation, let the user
11956 know why we cannot insert an Ada exception catchpoint.
11958 Note: Just for the purpose of inserting our Ada exception
11959 catchpoint, we could rely purely on the associated minimal symbol.
11960 But we would be operating in degraded mode anyway, since we are
11961 still lacking the debugging info needed later on to extract
11962 the name of the exception being raised (this name is printed in
11963 the catchpoint message, and is also used when trying to catch
11964 a specific exception). We do not handle this case for now. */
11965 struct bound_minimal_symbol msym
11966 = lookup_minimal_symbol (einfo->catch_exception_sym, NULL, NULL);
11968 if (msym.minsym && MSYMBOL_TYPE (msym.minsym) != mst_solib_trampoline)
11969 error (_("Your Ada runtime appears to be missing some debugging "
11970 "information.\nCannot insert Ada exception catchpoint "
11971 "in this configuration."));
11976 /* Make sure that the symbol we found corresponds to a function. */
11978 if (SYMBOL_CLASS (sym) != LOC_BLOCK)
11979 error (_("Symbol \"%s\" is not a function (class = %d)"),
11980 SYMBOL_LINKAGE_NAME (sym), SYMBOL_CLASS (sym));
11985 /* Inspect the Ada runtime and determine which exception info structure
11986 should be used to provide support for exception catchpoints.
11988 This function will always set the per-inferior exception_info,
11989 or raise an error. */
11992 ada_exception_support_info_sniffer (void)
11994 struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ());
11996 /* If the exception info is already known, then no need to recompute it. */
11997 if (data->exception_info != NULL)
12000 /* Check the latest (default) exception support info. */
12001 if (ada_has_this_exception_support (&default_exception_support_info))
12003 data->exception_info = &default_exception_support_info;
12007 /* Try our fallback exception suport info. */
12008 if (ada_has_this_exception_support (&exception_support_info_fallback))
12010 data->exception_info = &exception_support_info_fallback;
12014 /* Sometimes, it is normal for us to not be able to find the routine
12015 we are looking for. This happens when the program is linked with
12016 the shared version of the GNAT runtime, and the program has not been
12017 started yet. Inform the user of these two possible causes if
12020 if (ada_update_initial_language (language_unknown) != language_ada)
12021 error (_("Unable to insert catchpoint. Is this an Ada main program?"));
12023 /* If the symbol does not exist, then check that the program is
12024 already started, to make sure that shared libraries have been
12025 loaded. If it is not started, this may mean that the symbol is
12026 in a shared library. */
12028 if (ptid_get_pid (inferior_ptid) == 0)
12029 error (_("Unable to insert catchpoint. Try to start the program first."));
12031 /* At this point, we know that we are debugging an Ada program and
12032 that the inferior has been started, but we still are not able to
12033 find the run-time symbols. That can mean that we are in
12034 configurable run time mode, or that a-except as been optimized
12035 out by the linker... In any case, at this point it is not worth
12036 supporting this feature. */
12038 error (_("Cannot insert Ada exception catchpoints in this configuration."));
12041 /* True iff FRAME is very likely to be that of a function that is
12042 part of the runtime system. This is all very heuristic, but is
12043 intended to be used as advice as to what frames are uninteresting
12047 is_known_support_routine (struct frame_info *frame)
12049 struct symtab_and_line sal;
12051 enum language func_lang;
12053 const char *fullname;
12055 /* If this code does not have any debugging information (no symtab),
12056 This cannot be any user code. */
12058 find_frame_sal (frame, &sal);
12059 if (sal.symtab == NULL)
12062 /* If there is a symtab, but the associated source file cannot be
12063 located, then assume this is not user code: Selecting a frame
12064 for which we cannot display the code would not be very helpful
12065 for the user. This should also take care of case such as VxWorks
12066 where the kernel has some debugging info provided for a few units. */
12068 fullname = symtab_to_fullname (sal.symtab);
12069 if (access (fullname, R_OK) != 0)
12072 /* Check the unit filename againt the Ada runtime file naming.
12073 We also check the name of the objfile against the name of some
12074 known system libraries that sometimes come with debugging info
12077 for (i = 0; known_runtime_file_name_patterns[i] != NULL; i += 1)
12079 re_comp (known_runtime_file_name_patterns[i]);
12080 if (re_exec (lbasename (sal.symtab->filename)))
12082 if (SYMTAB_OBJFILE (sal.symtab) != NULL
12083 && re_exec (objfile_name (SYMTAB_OBJFILE (sal.symtab))))
12087 /* Check whether the function is a GNAT-generated entity. */
12089 find_frame_funname (frame, &func_name, &func_lang, NULL);
12090 if (func_name == NULL)
12093 for (i = 0; known_auxiliary_function_name_patterns[i] != NULL; i += 1)
12095 re_comp (known_auxiliary_function_name_patterns[i]);
12096 if (re_exec (func_name))
12107 /* Find the first frame that contains debugging information and that is not
12108 part of the Ada run-time, starting from FI and moving upward. */
12111 ada_find_printable_frame (struct frame_info *fi)
12113 for (; fi != NULL; fi = get_prev_frame (fi))
12115 if (!is_known_support_routine (fi))
12124 /* Assuming that the inferior just triggered an unhandled exception
12125 catchpoint, return the address in inferior memory where the name
12126 of the exception is stored.
12128 Return zero if the address could not be computed. */
12131 ada_unhandled_exception_name_addr (void)
12133 return parse_and_eval_address ("e.full_name");
12136 /* Same as ada_unhandled_exception_name_addr, except that this function
12137 should be used when the inferior uses an older version of the runtime,
12138 where the exception name needs to be extracted from a specific frame
12139 several frames up in the callstack. */
12142 ada_unhandled_exception_name_addr_from_raise (void)
12145 struct frame_info *fi;
12146 struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ());
12147 struct cleanup *old_chain;
12149 /* To determine the name of this exception, we need to select
12150 the frame corresponding to RAISE_SYM_NAME. This frame is
12151 at least 3 levels up, so we simply skip the first 3 frames
12152 without checking the name of their associated function. */
12153 fi = get_current_frame ();
12154 for (frame_level = 0; frame_level < 3; frame_level += 1)
12156 fi = get_prev_frame (fi);
12158 old_chain = make_cleanup (null_cleanup, NULL);
12162 enum language func_lang;
12164 find_frame_funname (fi, &func_name, &func_lang, NULL);
12165 if (func_name != NULL)
12167 make_cleanup (xfree, func_name);
12169 if (strcmp (func_name,
12170 data->exception_info->catch_exception_sym) == 0)
12171 break; /* We found the frame we were looking for... */
12172 fi = get_prev_frame (fi);
12175 do_cleanups (old_chain);
12181 return parse_and_eval_address ("id.full_name");
12184 /* Assuming the inferior just triggered an Ada exception catchpoint
12185 (of any type), return the address in inferior memory where the name
12186 of the exception is stored, if applicable.
12188 Assumes the selected frame is the current frame.
12190 Return zero if the address could not be computed, or if not relevant. */
12193 ada_exception_name_addr_1 (enum ada_exception_catchpoint_kind ex,
12194 struct breakpoint *b)
12196 struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ());
12200 case ada_catch_exception:
12201 return (parse_and_eval_address ("e.full_name"));
12204 case ada_catch_exception_unhandled:
12205 return data->exception_info->unhandled_exception_name_addr ();
12208 case ada_catch_assert:
12209 return 0; /* Exception name is not relevant in this case. */
12213 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
12217 return 0; /* Should never be reached. */
12220 /* Same as ada_exception_name_addr_1, except that it intercepts and contains
12221 any error that ada_exception_name_addr_1 might cause to be thrown.
12222 When an error is intercepted, a warning with the error message is printed,
12223 and zero is returned. */
12226 ada_exception_name_addr (enum ada_exception_catchpoint_kind ex,
12227 struct breakpoint *b)
12229 CORE_ADDR result = 0;
12233 result = ada_exception_name_addr_1 (ex, b);
12236 CATCH (e, RETURN_MASK_ERROR)
12238 warning (_("failed to get exception name: %s"), e.message);
12246 static char *ada_exception_catchpoint_cond_string (const char *excep_string);
12248 /* Ada catchpoints.
12250 In the case of catchpoints on Ada exceptions, the catchpoint will
12251 stop the target on every exception the program throws. When a user
12252 specifies the name of a specific exception, we translate this
12253 request into a condition expression (in text form), and then parse
12254 it into an expression stored in each of the catchpoint's locations.
12255 We then use this condition to check whether the exception that was
12256 raised is the one the user is interested in. If not, then the
12257 target is resumed again. We store the name of the requested
12258 exception, in order to be able to re-set the condition expression
12259 when symbols change. */
12261 /* An instance of this type is used to represent an Ada catchpoint
12262 breakpoint location. It includes a "struct bp_location" as a kind
12263 of base class; users downcast to "struct bp_location *" when
12266 struct ada_catchpoint_location
12268 /* The base class. */
12269 struct bp_location base;
12271 /* The condition that checks whether the exception that was raised
12272 is the specific exception the user specified on catchpoint
12274 expression_up excep_cond_expr;
12277 /* Implement the DTOR method in the bp_location_ops structure for all
12278 Ada exception catchpoint kinds. */
12281 ada_catchpoint_location_dtor (struct bp_location *bl)
12283 struct ada_catchpoint_location *al = (struct ada_catchpoint_location *) bl;
12285 al->excep_cond_expr.reset ();
12288 /* The vtable to be used in Ada catchpoint locations. */
12290 static const struct bp_location_ops ada_catchpoint_location_ops =
12292 ada_catchpoint_location_dtor
12295 /* An instance of this type is used to represent an Ada catchpoint.
12296 It includes a "struct breakpoint" as a kind of base class; users
12297 downcast to "struct breakpoint *" when needed. */
12299 struct ada_catchpoint
12301 /* The base class. */
12302 struct breakpoint base;
12304 /* The name of the specific exception the user specified. */
12305 char *excep_string;
12308 /* Parse the exception condition string in the context of each of the
12309 catchpoint's locations, and store them for later evaluation. */
12312 create_excep_cond_exprs (struct ada_catchpoint *c)
12314 struct cleanup *old_chain;
12315 struct bp_location *bl;
12318 /* Nothing to do if there's no specific exception to catch. */
12319 if (c->excep_string == NULL)
12322 /* Same if there are no locations... */
12323 if (c->base.loc == NULL)
12326 /* Compute the condition expression in text form, from the specific
12327 expection we want to catch. */
12328 cond_string = ada_exception_catchpoint_cond_string (c->excep_string);
12329 old_chain = make_cleanup (xfree, cond_string);
12331 /* Iterate over all the catchpoint's locations, and parse an
12332 expression for each. */
12333 for (bl = c->base.loc; bl != NULL; bl = bl->next)
12335 struct ada_catchpoint_location *ada_loc
12336 = (struct ada_catchpoint_location *) bl;
12339 if (!bl->shlib_disabled)
12346 exp = parse_exp_1 (&s, bl->address,
12347 block_for_pc (bl->address),
12350 CATCH (e, RETURN_MASK_ERROR)
12352 warning (_("failed to reevaluate internal exception condition "
12353 "for catchpoint %d: %s"),
12354 c->base.number, e.message);
12359 ada_loc->excep_cond_expr = std::move (exp);
12362 do_cleanups (old_chain);
12365 /* Implement the DTOR method in the breakpoint_ops structure for all
12366 exception catchpoint kinds. */
12369 dtor_exception (enum ada_exception_catchpoint_kind ex, struct breakpoint *b)
12371 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
12373 xfree (c->excep_string);
12375 bkpt_breakpoint_ops.dtor (b);
12378 /* Implement the ALLOCATE_LOCATION method in the breakpoint_ops
12379 structure for all exception catchpoint kinds. */
12381 static struct bp_location *
12382 allocate_location_exception (enum ada_exception_catchpoint_kind ex,
12383 struct breakpoint *self)
12385 struct ada_catchpoint_location *loc;
12387 loc = new ada_catchpoint_location ();
12388 init_bp_location (&loc->base, &ada_catchpoint_location_ops, self);
12389 loc->excep_cond_expr = NULL;
12393 /* Implement the RE_SET method in the breakpoint_ops structure for all
12394 exception catchpoint kinds. */
12397 re_set_exception (enum ada_exception_catchpoint_kind ex, struct breakpoint *b)
12399 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
12401 /* Call the base class's method. This updates the catchpoint's
12403 bkpt_breakpoint_ops.re_set (b);
12405 /* Reparse the exception conditional expressions. One for each
12407 create_excep_cond_exprs (c);
12410 /* Returns true if we should stop for this breakpoint hit. If the
12411 user specified a specific exception, we only want to cause a stop
12412 if the program thrown that exception. */
12415 should_stop_exception (const struct bp_location *bl)
12417 struct ada_catchpoint *c = (struct ada_catchpoint *) bl->owner;
12418 const struct ada_catchpoint_location *ada_loc
12419 = (const struct ada_catchpoint_location *) bl;
12422 /* With no specific exception, should always stop. */
12423 if (c->excep_string == NULL)
12426 if (ada_loc->excep_cond_expr == NULL)
12428 /* We will have a NULL expression if back when we were creating
12429 the expressions, this location's had failed to parse. */
12436 struct value *mark;
12438 mark = value_mark ();
12439 stop = value_true (evaluate_expression (ada_loc->excep_cond_expr.get ()));
12440 value_free_to_mark (mark);
12442 CATCH (ex, RETURN_MASK_ALL)
12444 exception_fprintf (gdb_stderr, ex,
12445 _("Error in testing exception condition:\n"));
12452 /* Implement the CHECK_STATUS method in the breakpoint_ops structure
12453 for all exception catchpoint kinds. */
12456 check_status_exception (enum ada_exception_catchpoint_kind ex, bpstat bs)
12458 bs->stop = should_stop_exception (bs->bp_location_at);
12461 /* Implement the PRINT_IT method in the breakpoint_ops structure
12462 for all exception catchpoint kinds. */
12464 static enum print_stop_action
12465 print_it_exception (enum ada_exception_catchpoint_kind ex, bpstat bs)
12467 struct ui_out *uiout = current_uiout;
12468 struct breakpoint *b = bs->breakpoint_at;
12470 annotate_catchpoint (b->number);
12472 if (ui_out_is_mi_like_p (uiout))
12474 ui_out_field_string (uiout, "reason",
12475 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT));
12476 ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition));
12479 ui_out_text (uiout,
12480 b->disposition == disp_del ? "\nTemporary catchpoint "
12481 : "\nCatchpoint ");
12482 ui_out_field_int (uiout, "bkptno", b->number);
12483 ui_out_text (uiout, ", ");
12485 /* ada_exception_name_addr relies on the selected frame being the
12486 current frame. Need to do this here because this function may be
12487 called more than once when printing a stop, and below, we'll
12488 select the first frame past the Ada run-time (see
12489 ada_find_printable_frame). */
12490 select_frame (get_current_frame ());
12494 case ada_catch_exception:
12495 case ada_catch_exception_unhandled:
12497 const CORE_ADDR addr = ada_exception_name_addr (ex, b);
12498 char exception_name[256];
12502 read_memory (addr, (gdb_byte *) exception_name,
12503 sizeof (exception_name) - 1);
12504 exception_name [sizeof (exception_name) - 1] = '\0';
12508 /* For some reason, we were unable to read the exception
12509 name. This could happen if the Runtime was compiled
12510 without debugging info, for instance. In that case,
12511 just replace the exception name by the generic string
12512 "exception" - it will read as "an exception" in the
12513 notification we are about to print. */
12514 memcpy (exception_name, "exception", sizeof ("exception"));
12516 /* In the case of unhandled exception breakpoints, we print
12517 the exception name as "unhandled EXCEPTION_NAME", to make
12518 it clearer to the user which kind of catchpoint just got
12519 hit. We used ui_out_text to make sure that this extra
12520 info does not pollute the exception name in the MI case. */
12521 if (ex == ada_catch_exception_unhandled)
12522 ui_out_text (uiout, "unhandled ");
12523 ui_out_field_string (uiout, "exception-name", exception_name);
12526 case ada_catch_assert:
12527 /* In this case, the name of the exception is not really
12528 important. Just print "failed assertion" to make it clearer
12529 that his program just hit an assertion-failure catchpoint.
12530 We used ui_out_text because this info does not belong in
12532 ui_out_text (uiout, "failed assertion");
12535 ui_out_text (uiout, " at ");
12536 ada_find_printable_frame (get_current_frame ());
12538 return PRINT_SRC_AND_LOC;
12541 /* Implement the PRINT_ONE method in the breakpoint_ops structure
12542 for all exception catchpoint kinds. */
12545 print_one_exception (enum ada_exception_catchpoint_kind ex,
12546 struct breakpoint *b, struct bp_location **last_loc)
12548 struct ui_out *uiout = current_uiout;
12549 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
12550 struct value_print_options opts;
12552 get_user_print_options (&opts);
12553 if (opts.addressprint)
12555 annotate_field (4);
12556 ui_out_field_core_addr (uiout, "addr", b->loc->gdbarch, b->loc->address);
12559 annotate_field (5);
12560 *last_loc = b->loc;
12563 case ada_catch_exception:
12564 if (c->excep_string != NULL)
12566 char *msg = xstrprintf (_("`%s' Ada exception"), c->excep_string);
12568 ui_out_field_string (uiout, "what", msg);
12572 ui_out_field_string (uiout, "what", "all Ada exceptions");
12576 case ada_catch_exception_unhandled:
12577 ui_out_field_string (uiout, "what", "unhandled Ada exceptions");
12580 case ada_catch_assert:
12581 ui_out_field_string (uiout, "what", "failed Ada assertions");
12585 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
12590 /* Implement the PRINT_MENTION method in the breakpoint_ops structure
12591 for all exception catchpoint kinds. */
12594 print_mention_exception (enum ada_exception_catchpoint_kind ex,
12595 struct breakpoint *b)
12597 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
12598 struct ui_out *uiout = current_uiout;
12600 ui_out_text (uiout, b->disposition == disp_del ? _("Temporary catchpoint ")
12601 : _("Catchpoint "));
12602 ui_out_field_int (uiout, "bkptno", b->number);
12603 ui_out_text (uiout, ": ");
12607 case ada_catch_exception:
12608 if (c->excep_string != NULL)
12610 char *info = xstrprintf (_("`%s' Ada exception"), c->excep_string);
12611 struct cleanup *old_chain = make_cleanup (xfree, info);
12613 ui_out_text (uiout, info);
12614 do_cleanups (old_chain);
12617 ui_out_text (uiout, _("all Ada exceptions"));
12620 case ada_catch_exception_unhandled:
12621 ui_out_text (uiout, _("unhandled Ada exceptions"));
12624 case ada_catch_assert:
12625 ui_out_text (uiout, _("failed Ada assertions"));
12629 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
12634 /* Implement the PRINT_RECREATE method in the breakpoint_ops structure
12635 for all exception catchpoint kinds. */
12638 print_recreate_exception (enum ada_exception_catchpoint_kind ex,
12639 struct breakpoint *b, struct ui_file *fp)
12641 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
12645 case ada_catch_exception:
12646 fprintf_filtered (fp, "catch exception");
12647 if (c->excep_string != NULL)
12648 fprintf_filtered (fp, " %s", c->excep_string);
12651 case ada_catch_exception_unhandled:
12652 fprintf_filtered (fp, "catch exception unhandled");
12655 case ada_catch_assert:
12656 fprintf_filtered (fp, "catch assert");
12660 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
12662 print_recreate_thread (b, fp);
12665 /* Virtual table for "catch exception" breakpoints. */
12668 dtor_catch_exception (struct breakpoint *b)
12670 dtor_exception (ada_catch_exception, b);
12673 static struct bp_location *
12674 allocate_location_catch_exception (struct breakpoint *self)
12676 return allocate_location_exception (ada_catch_exception, self);
12680 re_set_catch_exception (struct breakpoint *b)
12682 re_set_exception (ada_catch_exception, b);
12686 check_status_catch_exception (bpstat bs)
12688 check_status_exception (ada_catch_exception, bs);
12691 static enum print_stop_action
12692 print_it_catch_exception (bpstat bs)
12694 return print_it_exception (ada_catch_exception, bs);
12698 print_one_catch_exception (struct breakpoint *b, struct bp_location **last_loc)
12700 print_one_exception (ada_catch_exception, b, last_loc);
12704 print_mention_catch_exception (struct breakpoint *b)
12706 print_mention_exception (ada_catch_exception, b);
12710 print_recreate_catch_exception (struct breakpoint *b, struct ui_file *fp)
12712 print_recreate_exception (ada_catch_exception, b, fp);
12715 static struct breakpoint_ops catch_exception_breakpoint_ops;
12717 /* Virtual table for "catch exception unhandled" breakpoints. */
12720 dtor_catch_exception_unhandled (struct breakpoint *b)
12722 dtor_exception (ada_catch_exception_unhandled, b);
12725 static struct bp_location *
12726 allocate_location_catch_exception_unhandled (struct breakpoint *self)
12728 return allocate_location_exception (ada_catch_exception_unhandled, self);
12732 re_set_catch_exception_unhandled (struct breakpoint *b)
12734 re_set_exception (ada_catch_exception_unhandled, b);
12738 check_status_catch_exception_unhandled (bpstat bs)
12740 check_status_exception (ada_catch_exception_unhandled, bs);
12743 static enum print_stop_action
12744 print_it_catch_exception_unhandled (bpstat bs)
12746 return print_it_exception (ada_catch_exception_unhandled, bs);
12750 print_one_catch_exception_unhandled (struct breakpoint *b,
12751 struct bp_location **last_loc)
12753 print_one_exception (ada_catch_exception_unhandled, b, last_loc);
12757 print_mention_catch_exception_unhandled (struct breakpoint *b)
12759 print_mention_exception (ada_catch_exception_unhandled, b);
12763 print_recreate_catch_exception_unhandled (struct breakpoint *b,
12764 struct ui_file *fp)
12766 print_recreate_exception (ada_catch_exception_unhandled, b, fp);
12769 static struct breakpoint_ops catch_exception_unhandled_breakpoint_ops;
12771 /* Virtual table for "catch assert" breakpoints. */
12774 dtor_catch_assert (struct breakpoint *b)
12776 dtor_exception (ada_catch_assert, b);
12779 static struct bp_location *
12780 allocate_location_catch_assert (struct breakpoint *self)
12782 return allocate_location_exception (ada_catch_assert, self);
12786 re_set_catch_assert (struct breakpoint *b)
12788 re_set_exception (ada_catch_assert, b);
12792 check_status_catch_assert (bpstat bs)
12794 check_status_exception (ada_catch_assert, bs);
12797 static enum print_stop_action
12798 print_it_catch_assert (bpstat bs)
12800 return print_it_exception (ada_catch_assert, bs);
12804 print_one_catch_assert (struct breakpoint *b, struct bp_location **last_loc)
12806 print_one_exception (ada_catch_assert, b, last_loc);
12810 print_mention_catch_assert (struct breakpoint *b)
12812 print_mention_exception (ada_catch_assert, b);
12816 print_recreate_catch_assert (struct breakpoint *b, struct ui_file *fp)
12818 print_recreate_exception (ada_catch_assert, b, fp);
12821 static struct breakpoint_ops catch_assert_breakpoint_ops;
12823 /* Return a newly allocated copy of the first space-separated token
12824 in ARGSP, and then adjust ARGSP to point immediately after that
12827 Return NULL if ARGPS does not contain any more tokens. */
12830 ada_get_next_arg (char **argsp)
12832 char *args = *argsp;
12836 args = skip_spaces (args);
12837 if (args[0] == '\0')
12838 return NULL; /* No more arguments. */
12840 /* Find the end of the current argument. */
12842 end = skip_to_space (args);
12844 /* Adjust ARGSP to point to the start of the next argument. */
12848 /* Make a copy of the current argument and return it. */
12850 result = (char *) xmalloc (end - args + 1);
12851 strncpy (result, args, end - args);
12852 result[end - args] = '\0';
12857 /* Split the arguments specified in a "catch exception" command.
12858 Set EX to the appropriate catchpoint type.
12859 Set EXCEP_STRING to the name of the specific exception if
12860 specified by the user.
12861 If a condition is found at the end of the arguments, the condition
12862 expression is stored in COND_STRING (memory must be deallocated
12863 after use). Otherwise COND_STRING is set to NULL. */
12866 catch_ada_exception_command_split (char *args,
12867 enum ada_exception_catchpoint_kind *ex,
12868 char **excep_string,
12869 char **cond_string)
12871 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
12872 char *exception_name;
12875 exception_name = ada_get_next_arg (&args);
12876 if (exception_name != NULL && strcmp (exception_name, "if") == 0)
12878 /* This is not an exception name; this is the start of a condition
12879 expression for a catchpoint on all exceptions. So, "un-get"
12880 this token, and set exception_name to NULL. */
12881 xfree (exception_name);
12882 exception_name = NULL;
12885 make_cleanup (xfree, exception_name);
12887 /* Check to see if we have a condition. */
12889 args = skip_spaces (args);
12890 if (startswith (args, "if")
12891 && (isspace (args[2]) || args[2] == '\0'))
12894 args = skip_spaces (args);
12896 if (args[0] == '\0')
12897 error (_("Condition missing after `if' keyword"));
12898 cond = xstrdup (args);
12899 make_cleanup (xfree, cond);
12901 args += strlen (args);
12904 /* Check that we do not have any more arguments. Anything else
12907 if (args[0] != '\0')
12908 error (_("Junk at end of expression"));
12910 discard_cleanups (old_chain);
12912 if (exception_name == NULL)
12914 /* Catch all exceptions. */
12915 *ex = ada_catch_exception;
12916 *excep_string = NULL;
12918 else if (strcmp (exception_name, "unhandled") == 0)
12920 /* Catch unhandled exceptions. */
12921 *ex = ada_catch_exception_unhandled;
12922 *excep_string = NULL;
12926 /* Catch a specific exception. */
12927 *ex = ada_catch_exception;
12928 *excep_string = exception_name;
12930 *cond_string = cond;
12933 /* Return the name of the symbol on which we should break in order to
12934 implement a catchpoint of the EX kind. */
12936 static const char *
12937 ada_exception_sym_name (enum ada_exception_catchpoint_kind ex)
12939 struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ());
12941 gdb_assert (data->exception_info != NULL);
12945 case ada_catch_exception:
12946 return (data->exception_info->catch_exception_sym);
12948 case ada_catch_exception_unhandled:
12949 return (data->exception_info->catch_exception_unhandled_sym);
12951 case ada_catch_assert:
12952 return (data->exception_info->catch_assert_sym);
12955 internal_error (__FILE__, __LINE__,
12956 _("unexpected catchpoint kind (%d)"), ex);
12960 /* Return the breakpoint ops "virtual table" used for catchpoints
12963 static const struct breakpoint_ops *
12964 ada_exception_breakpoint_ops (enum ada_exception_catchpoint_kind ex)
12968 case ada_catch_exception:
12969 return (&catch_exception_breakpoint_ops);
12971 case ada_catch_exception_unhandled:
12972 return (&catch_exception_unhandled_breakpoint_ops);
12974 case ada_catch_assert:
12975 return (&catch_assert_breakpoint_ops);
12978 internal_error (__FILE__, __LINE__,
12979 _("unexpected catchpoint kind (%d)"), ex);
12983 /* Return the condition that will be used to match the current exception
12984 being raised with the exception that the user wants to catch. This
12985 assumes that this condition is used when the inferior just triggered
12986 an exception catchpoint.
12988 The string returned is a newly allocated string that needs to be
12989 deallocated later. */
12992 ada_exception_catchpoint_cond_string (const char *excep_string)
12996 /* The standard exceptions are a special case. They are defined in
12997 runtime units that have been compiled without debugging info; if
12998 EXCEP_STRING is the not-fully-qualified name of a standard
12999 exception (e.g. "constraint_error") then, during the evaluation
13000 of the condition expression, the symbol lookup on this name would
13001 *not* return this standard exception. The catchpoint condition
13002 may then be set only on user-defined exceptions which have the
13003 same not-fully-qualified name (e.g. my_package.constraint_error).
13005 To avoid this unexcepted behavior, these standard exceptions are
13006 systematically prefixed by "standard". This means that "catch
13007 exception constraint_error" is rewritten into "catch exception
13008 standard.constraint_error".
13010 If an exception named contraint_error is defined in another package of
13011 the inferior program, then the only way to specify this exception as a
13012 breakpoint condition is to use its fully-qualified named:
13013 e.g. my_package.constraint_error. */
13015 for (i = 0; i < sizeof (standard_exc) / sizeof (char *); i++)
13017 if (strcmp (standard_exc [i], excep_string) == 0)
13019 return xstrprintf ("long_integer (e) = long_integer (&standard.%s)",
13023 return xstrprintf ("long_integer (e) = long_integer (&%s)", excep_string);
13026 /* Return the symtab_and_line that should be used to insert an exception
13027 catchpoint of the TYPE kind.
13029 EXCEP_STRING should contain the name of a specific exception that
13030 the catchpoint should catch, or NULL otherwise.
13032 ADDR_STRING returns the name of the function where the real
13033 breakpoint that implements the catchpoints is set, depending on the
13034 type of catchpoint we need to create. */
13036 static struct symtab_and_line
13037 ada_exception_sal (enum ada_exception_catchpoint_kind ex, char *excep_string,
13038 char **addr_string, const struct breakpoint_ops **ops)
13040 const char *sym_name;
13041 struct symbol *sym;
13043 /* First, find out which exception support info to use. */
13044 ada_exception_support_info_sniffer ();
13046 /* Then lookup the function on which we will break in order to catch
13047 the Ada exceptions requested by the user. */
13048 sym_name = ada_exception_sym_name (ex);
13049 sym = standard_lookup (sym_name, NULL, VAR_DOMAIN);
13051 /* We can assume that SYM is not NULL at this stage. If the symbol
13052 did not exist, ada_exception_support_info_sniffer would have
13053 raised an exception.
13055 Also, ada_exception_support_info_sniffer should have already
13056 verified that SYM is a function symbol. */
13057 gdb_assert (sym != NULL);
13058 gdb_assert (SYMBOL_CLASS (sym) == LOC_BLOCK);
13060 /* Set ADDR_STRING. */
13061 *addr_string = xstrdup (sym_name);
13064 *ops = ada_exception_breakpoint_ops (ex);
13066 return find_function_start_sal (sym, 1);
13069 /* Create an Ada exception catchpoint.
13071 EX_KIND is the kind of exception catchpoint to be created.
13073 If EXCEPT_STRING is NULL, this catchpoint is expected to trigger
13074 for all exceptions. Otherwise, EXCEPT_STRING indicates the name
13075 of the exception to which this catchpoint applies. When not NULL,
13076 the string must be allocated on the heap, and its deallocation
13077 is no longer the responsibility of the caller.
13079 COND_STRING, if not NULL, is the catchpoint condition. This string
13080 must be allocated on the heap, and its deallocation is no longer
13081 the responsibility of the caller.
13083 TEMPFLAG, if nonzero, means that the underlying breakpoint
13084 should be temporary.
13086 FROM_TTY is the usual argument passed to all commands implementations. */
13089 create_ada_exception_catchpoint (struct gdbarch *gdbarch,
13090 enum ada_exception_catchpoint_kind ex_kind,
13091 char *excep_string,
13097 struct ada_catchpoint *c;
13098 char *addr_string = NULL;
13099 const struct breakpoint_ops *ops = NULL;
13100 struct symtab_and_line sal
13101 = ada_exception_sal (ex_kind, excep_string, &addr_string, &ops);
13103 c = new ada_catchpoint ();
13104 init_ada_exception_breakpoint (&c->base, gdbarch, sal, addr_string,
13105 ops, tempflag, disabled, from_tty);
13106 c->excep_string = excep_string;
13107 create_excep_cond_exprs (c);
13108 if (cond_string != NULL)
13109 set_breakpoint_condition (&c->base, cond_string, from_tty);
13110 install_breakpoint (0, &c->base, 1);
13113 /* Implement the "catch exception" command. */
13116 catch_ada_exception_command (char *arg, int from_tty,
13117 struct cmd_list_element *command)
13119 struct gdbarch *gdbarch = get_current_arch ();
13121 enum ada_exception_catchpoint_kind ex_kind;
13122 char *excep_string = NULL;
13123 char *cond_string = NULL;
13125 tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
13129 catch_ada_exception_command_split (arg, &ex_kind, &excep_string,
13131 create_ada_exception_catchpoint (gdbarch, ex_kind,
13132 excep_string, cond_string,
13133 tempflag, 1 /* enabled */,
13137 /* Split the arguments specified in a "catch assert" command.
13139 ARGS contains the command's arguments (or the empty string if
13140 no arguments were passed).
13142 If ARGS contains a condition, set COND_STRING to that condition
13143 (the memory needs to be deallocated after use). */
13146 catch_ada_assert_command_split (char *args, char **cond_string)
13148 args = skip_spaces (args);
13150 /* Check whether a condition was provided. */
13151 if (startswith (args, "if")
13152 && (isspace (args[2]) || args[2] == '\0'))
13155 args = skip_spaces (args);
13156 if (args[0] == '\0')
13157 error (_("condition missing after `if' keyword"));
13158 *cond_string = xstrdup (args);
13161 /* Otherwise, there should be no other argument at the end of
13163 else if (args[0] != '\0')
13164 error (_("Junk at end of arguments."));
13167 /* Implement the "catch assert" command. */
13170 catch_assert_command (char *arg, int from_tty,
13171 struct cmd_list_element *command)
13173 struct gdbarch *gdbarch = get_current_arch ();
13175 char *cond_string = NULL;
13177 tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
13181 catch_ada_assert_command_split (arg, &cond_string);
13182 create_ada_exception_catchpoint (gdbarch, ada_catch_assert,
13184 tempflag, 1 /* enabled */,
13188 /* Return non-zero if the symbol SYM is an Ada exception object. */
13191 ada_is_exception_sym (struct symbol *sym)
13193 const char *type_name = type_name_no_tag (SYMBOL_TYPE (sym));
13195 return (SYMBOL_CLASS (sym) != LOC_TYPEDEF
13196 && SYMBOL_CLASS (sym) != LOC_BLOCK
13197 && SYMBOL_CLASS (sym) != LOC_CONST
13198 && SYMBOL_CLASS (sym) != LOC_UNRESOLVED
13199 && type_name != NULL && strcmp (type_name, "exception") == 0);
13202 /* Given a global symbol SYM, return non-zero iff SYM is a non-standard
13203 Ada exception object. This matches all exceptions except the ones
13204 defined by the Ada language. */
13207 ada_is_non_standard_exception_sym (struct symbol *sym)
13211 if (!ada_is_exception_sym (sym))
13214 for (i = 0; i < ARRAY_SIZE (standard_exc); i++)
13215 if (strcmp (SYMBOL_LINKAGE_NAME (sym), standard_exc[i]) == 0)
13216 return 0; /* A standard exception. */
13218 /* Numeric_Error is also a standard exception, so exclude it.
13219 See the STANDARD_EXC description for more details as to why
13220 this exception is not listed in that array. */
13221 if (strcmp (SYMBOL_LINKAGE_NAME (sym), "numeric_error") == 0)
13227 /* A helper function for qsort, comparing two struct ada_exc_info
13230 The comparison is determined first by exception name, and then
13231 by exception address. */
13234 compare_ada_exception_info (const void *a, const void *b)
13236 const struct ada_exc_info *exc_a = (struct ada_exc_info *) a;
13237 const struct ada_exc_info *exc_b = (struct ada_exc_info *) b;
13240 result = strcmp (exc_a->name, exc_b->name);
13244 if (exc_a->addr < exc_b->addr)
13246 if (exc_a->addr > exc_b->addr)
13252 /* Sort EXCEPTIONS using compare_ada_exception_info as the comparison
13253 routine, but keeping the first SKIP elements untouched.
13255 All duplicates are also removed. */
13258 sort_remove_dups_ada_exceptions_list (VEC(ada_exc_info) **exceptions,
13261 struct ada_exc_info *to_sort
13262 = VEC_address (ada_exc_info, *exceptions) + skip;
13264 = VEC_length (ada_exc_info, *exceptions) - skip;
13267 qsort (to_sort, to_sort_len, sizeof (struct ada_exc_info),
13268 compare_ada_exception_info);
13270 for (i = 1, j = 1; i < to_sort_len; i++)
13271 if (compare_ada_exception_info (&to_sort[i], &to_sort[j - 1]) != 0)
13272 to_sort[j++] = to_sort[i];
13274 VEC_truncate(ada_exc_info, *exceptions, skip + to_sort_len);
13277 /* A function intended as the "name_matcher" callback in the struct
13278 quick_symbol_functions' expand_symtabs_matching method.
13280 SEARCH_NAME is the symbol's search name.
13282 If USER_DATA is not NULL, it is a pointer to a regext_t object
13283 used to match the symbol (by natural name). Otherwise, when USER_DATA
13284 is null, no filtering is performed, and all symbols are a positive
13288 ada_exc_search_name_matches (const char *search_name, void *user_data)
13290 regex_t *preg = (regex_t *) user_data;
13295 /* In Ada, the symbol "search name" is a linkage name, whereas
13296 the regular expression used to do the matching refers to
13297 the natural name. So match against the decoded name. */
13298 return (regexec (preg, ada_decode (search_name), 0, NULL, 0) == 0);
13301 /* Add all exceptions defined by the Ada standard whose name match
13302 a regular expression.
13304 If PREG is not NULL, then this regexp_t object is used to
13305 perform the symbol name matching. Otherwise, no name-based
13306 filtering is performed.
13308 EXCEPTIONS is a vector of exceptions to which matching exceptions
13312 ada_add_standard_exceptions (regex_t *preg, VEC(ada_exc_info) **exceptions)
13316 for (i = 0; i < ARRAY_SIZE (standard_exc); i++)
13319 || regexec (preg, standard_exc[i], 0, NULL, 0) == 0)
13321 struct bound_minimal_symbol msymbol
13322 = ada_lookup_simple_minsym (standard_exc[i]);
13324 if (msymbol.minsym != NULL)
13326 struct ada_exc_info info
13327 = {standard_exc[i], BMSYMBOL_VALUE_ADDRESS (msymbol)};
13329 VEC_safe_push (ada_exc_info, *exceptions, &info);
13335 /* Add all Ada exceptions defined locally and accessible from the given
13338 If PREG is not NULL, then this regexp_t object is used to
13339 perform the symbol name matching. Otherwise, no name-based
13340 filtering is performed.
13342 EXCEPTIONS is a vector of exceptions to which matching exceptions
13346 ada_add_exceptions_from_frame (regex_t *preg, struct frame_info *frame,
13347 VEC(ada_exc_info) **exceptions)
13349 const struct block *block = get_frame_block (frame, 0);
13353 struct block_iterator iter;
13354 struct symbol *sym;
13356 ALL_BLOCK_SYMBOLS (block, iter, sym)
13358 switch (SYMBOL_CLASS (sym))
13365 if (ada_is_exception_sym (sym))
13367 struct ada_exc_info info = {SYMBOL_PRINT_NAME (sym),
13368 SYMBOL_VALUE_ADDRESS (sym)};
13370 VEC_safe_push (ada_exc_info, *exceptions, &info);
13374 if (BLOCK_FUNCTION (block) != NULL)
13376 block = BLOCK_SUPERBLOCK (block);
13380 /* Add all exceptions defined globally whose name name match
13381 a regular expression, excluding standard exceptions.
13383 The reason we exclude standard exceptions is that they need
13384 to be handled separately: Standard exceptions are defined inside
13385 a runtime unit which is normally not compiled with debugging info,
13386 and thus usually do not show up in our symbol search. However,
13387 if the unit was in fact built with debugging info, we need to
13388 exclude them because they would duplicate the entry we found
13389 during the special loop that specifically searches for those
13390 standard exceptions.
13392 If PREG is not NULL, then this regexp_t object is used to
13393 perform the symbol name matching. Otherwise, no name-based
13394 filtering is performed.
13396 EXCEPTIONS is a vector of exceptions to which matching exceptions
13400 ada_add_global_exceptions (regex_t *preg, VEC(ada_exc_info) **exceptions)
13402 struct objfile *objfile;
13403 struct compunit_symtab *s;
13405 expand_symtabs_matching (NULL, ada_exc_search_name_matches, NULL,
13406 VARIABLES_DOMAIN, preg);
13408 ALL_COMPUNITS (objfile, s)
13410 const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (s);
13413 for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
13415 struct block *b = BLOCKVECTOR_BLOCK (bv, i);
13416 struct block_iterator iter;
13417 struct symbol *sym;
13419 ALL_BLOCK_SYMBOLS (b, iter, sym)
13420 if (ada_is_non_standard_exception_sym (sym)
13422 || regexec (preg, SYMBOL_NATURAL_NAME (sym),
13425 struct ada_exc_info info
13426 = {SYMBOL_PRINT_NAME (sym), SYMBOL_VALUE_ADDRESS (sym)};
13428 VEC_safe_push (ada_exc_info, *exceptions, &info);
13434 /* Implements ada_exceptions_list with the regular expression passed
13435 as a regex_t, rather than a string.
13437 If not NULL, PREG is used to filter out exceptions whose names
13438 do not match. Otherwise, all exceptions are listed. */
13440 static VEC(ada_exc_info) *
13441 ada_exceptions_list_1 (regex_t *preg)
13443 VEC(ada_exc_info) *result = NULL;
13444 struct cleanup *old_chain
13445 = make_cleanup (VEC_cleanup (ada_exc_info), &result);
13448 /* First, list the known standard exceptions. These exceptions
13449 need to be handled separately, as they are usually defined in
13450 runtime units that have been compiled without debugging info. */
13452 ada_add_standard_exceptions (preg, &result);
13454 /* Next, find all exceptions whose scope is local and accessible
13455 from the currently selected frame. */
13457 if (has_stack_frames ())
13459 prev_len = VEC_length (ada_exc_info, result);
13460 ada_add_exceptions_from_frame (preg, get_selected_frame (NULL),
13462 if (VEC_length (ada_exc_info, result) > prev_len)
13463 sort_remove_dups_ada_exceptions_list (&result, prev_len);
13466 /* Add all exceptions whose scope is global. */
13468 prev_len = VEC_length (ada_exc_info, result);
13469 ada_add_global_exceptions (preg, &result);
13470 if (VEC_length (ada_exc_info, result) > prev_len)
13471 sort_remove_dups_ada_exceptions_list (&result, prev_len);
13473 discard_cleanups (old_chain);
13477 /* Return a vector of ada_exc_info.
13479 If REGEXP is NULL, all exceptions are included in the result.
13480 Otherwise, it should contain a valid regular expression,
13481 and only the exceptions whose names match that regular expression
13482 are included in the result.
13484 The exceptions are sorted in the following order:
13485 - Standard exceptions (defined by the Ada language), in
13486 alphabetical order;
13487 - Exceptions only visible from the current frame, in
13488 alphabetical order;
13489 - Exceptions whose scope is global, in alphabetical order. */
13491 VEC(ada_exc_info) *
13492 ada_exceptions_list (const char *regexp)
13494 VEC(ada_exc_info) *result = NULL;
13495 struct cleanup *old_chain = NULL;
13498 if (regexp != NULL)
13499 old_chain = compile_rx_or_error (®, regexp,
13500 _("invalid regular expression"));
13502 result = ada_exceptions_list_1 (regexp != NULL ? ® : NULL);
13504 if (old_chain != NULL)
13505 do_cleanups (old_chain);
13509 /* Implement the "info exceptions" command. */
13512 info_exceptions_command (char *regexp, int from_tty)
13514 VEC(ada_exc_info) *exceptions;
13515 struct cleanup *cleanup;
13516 struct gdbarch *gdbarch = get_current_arch ();
13518 struct ada_exc_info *info;
13520 exceptions = ada_exceptions_list (regexp);
13521 cleanup = make_cleanup (VEC_cleanup (ada_exc_info), &exceptions);
13523 if (regexp != NULL)
13525 (_("All Ada exceptions matching regular expression \"%s\":\n"), regexp);
13527 printf_filtered (_("All defined Ada exceptions:\n"));
13529 for (ix = 0; VEC_iterate(ada_exc_info, exceptions, ix, info); ix++)
13530 printf_filtered ("%s: %s\n", info->name, paddress (gdbarch, info->addr));
13532 do_cleanups (cleanup);
13536 /* Information about operators given special treatment in functions
13538 /* Format: OP_DEFN (<operator>, <operator length>, <# args>, <binop>). */
13540 #define ADA_OPERATORS \
13541 OP_DEFN (OP_VAR_VALUE, 4, 0, 0) \
13542 OP_DEFN (BINOP_IN_BOUNDS, 3, 2, 0) \
13543 OP_DEFN (TERNOP_IN_RANGE, 1, 3, 0) \
13544 OP_DEFN (OP_ATR_FIRST, 1, 2, 0) \
13545 OP_DEFN (OP_ATR_LAST, 1, 2, 0) \
13546 OP_DEFN (OP_ATR_LENGTH, 1, 2, 0) \
13547 OP_DEFN (OP_ATR_IMAGE, 1, 2, 0) \
13548 OP_DEFN (OP_ATR_MAX, 1, 3, 0) \
13549 OP_DEFN (OP_ATR_MIN, 1, 3, 0) \
13550 OP_DEFN (OP_ATR_MODULUS, 1, 1, 0) \
13551 OP_DEFN (OP_ATR_POS, 1, 2, 0) \
13552 OP_DEFN (OP_ATR_SIZE, 1, 1, 0) \
13553 OP_DEFN (OP_ATR_TAG, 1, 1, 0) \
13554 OP_DEFN (OP_ATR_VAL, 1, 2, 0) \
13555 OP_DEFN (UNOP_QUAL, 3, 1, 0) \
13556 OP_DEFN (UNOP_IN_RANGE, 3, 1, 0) \
13557 OP_DEFN (OP_OTHERS, 1, 1, 0) \
13558 OP_DEFN (OP_POSITIONAL, 3, 1, 0) \
13559 OP_DEFN (OP_DISCRETE_RANGE, 1, 2, 0)
13562 ada_operator_length (const struct expression *exp, int pc, int *oplenp,
13565 switch (exp->elts[pc - 1].opcode)
13568 operator_length_standard (exp, pc, oplenp, argsp);
13571 #define OP_DEFN(op, len, args, binop) \
13572 case op: *oplenp = len; *argsp = args; break;
13578 *argsp = longest_to_int (exp->elts[pc - 2].longconst);
13583 *argsp = longest_to_int (exp->elts[pc - 2].longconst) + 1;
13588 /* Implementation of the exp_descriptor method operator_check. */
13591 ada_operator_check (struct expression *exp, int pos,
13592 int (*objfile_func) (struct objfile *objfile, void *data),
13595 const union exp_element *const elts = exp->elts;
13596 struct type *type = NULL;
13598 switch (elts[pos].opcode)
13600 case UNOP_IN_RANGE:
13602 type = elts[pos + 1].type;
13606 return operator_check_standard (exp, pos, objfile_func, data);
13609 /* Invoke callbacks for TYPE and OBJFILE if they were set as non-NULL. */
13611 if (type && TYPE_OBJFILE (type)
13612 && (*objfile_func) (TYPE_OBJFILE (type), data))
13619 ada_op_name (enum exp_opcode opcode)
13624 return op_name_standard (opcode);
13626 #define OP_DEFN(op, len, args, binop) case op: return #op;
13631 return "OP_AGGREGATE";
13633 return "OP_CHOICES";
13639 /* As for operator_length, but assumes PC is pointing at the first
13640 element of the operator, and gives meaningful results only for the
13641 Ada-specific operators, returning 0 for *OPLENP and *ARGSP otherwise. */
13644 ada_forward_operator_length (struct expression *exp, int pc,
13645 int *oplenp, int *argsp)
13647 switch (exp->elts[pc].opcode)
13650 *oplenp = *argsp = 0;
13653 #define OP_DEFN(op, len, args, binop) \
13654 case op: *oplenp = len; *argsp = args; break;
13660 *argsp = longest_to_int (exp->elts[pc + 1].longconst);
13665 *argsp = longest_to_int (exp->elts[pc + 1].longconst) + 1;
13671 int len = longest_to_int (exp->elts[pc + 1].longconst);
13673 *oplenp = 4 + BYTES_TO_EXP_ELEM (len + 1);
13681 ada_dump_subexp_body (struct expression *exp, struct ui_file *stream, int elt)
13683 enum exp_opcode op = exp->elts[elt].opcode;
13688 ada_forward_operator_length (exp, elt, &oplen, &nargs);
13692 /* Ada attributes ('Foo). */
13695 case OP_ATR_LENGTH:
13699 case OP_ATR_MODULUS:
13706 case UNOP_IN_RANGE:
13708 /* XXX: gdb_sprint_host_address, type_sprint */
13709 fprintf_filtered (stream, _("Type @"));
13710 gdb_print_host_address (exp->elts[pc + 1].type, stream);
13711 fprintf_filtered (stream, " (");
13712 type_print (exp->elts[pc + 1].type, NULL, stream, 0);
13713 fprintf_filtered (stream, ")");
13715 case BINOP_IN_BOUNDS:
13716 fprintf_filtered (stream, " (%d)",
13717 longest_to_int (exp->elts[pc + 2].longconst));
13719 case TERNOP_IN_RANGE:
13724 case OP_DISCRETE_RANGE:
13725 case OP_POSITIONAL:
13732 char *name = &exp->elts[elt + 2].string;
13733 int len = longest_to_int (exp->elts[elt + 1].longconst);
13735 fprintf_filtered (stream, "Text: `%.*s'", len, name);
13740 return dump_subexp_body_standard (exp, stream, elt);
13744 for (i = 0; i < nargs; i += 1)
13745 elt = dump_subexp (exp, stream, elt);
13750 /* The Ada extension of print_subexp (q.v.). */
13753 ada_print_subexp (struct expression *exp, int *pos,
13754 struct ui_file *stream, enum precedence prec)
13756 int oplen, nargs, i;
13758 enum exp_opcode op = exp->elts[pc].opcode;
13760 ada_forward_operator_length (exp, pc, &oplen, &nargs);
13767 print_subexp_standard (exp, pos, stream, prec);
13771 fputs_filtered (SYMBOL_NATURAL_NAME (exp->elts[pc + 2].symbol), stream);
13774 case BINOP_IN_BOUNDS:
13775 /* XXX: sprint_subexp */
13776 print_subexp (exp, pos, stream, PREC_SUFFIX);
13777 fputs_filtered (" in ", stream);
13778 print_subexp (exp, pos, stream, PREC_SUFFIX);
13779 fputs_filtered ("'range", stream);
13780 if (exp->elts[pc + 1].longconst > 1)
13781 fprintf_filtered (stream, "(%ld)",
13782 (long) exp->elts[pc + 1].longconst);
13785 case TERNOP_IN_RANGE:
13786 if (prec >= PREC_EQUAL)
13787 fputs_filtered ("(", stream);
13788 /* XXX: sprint_subexp */
13789 print_subexp (exp, pos, stream, PREC_SUFFIX);
13790 fputs_filtered (" in ", stream);
13791 print_subexp (exp, pos, stream, PREC_EQUAL);
13792 fputs_filtered (" .. ", stream);
13793 print_subexp (exp, pos, stream, PREC_EQUAL);
13794 if (prec >= PREC_EQUAL)
13795 fputs_filtered (")", stream);
13800 case OP_ATR_LENGTH:
13804 case OP_ATR_MODULUS:
13809 if (exp->elts[*pos].opcode == OP_TYPE)
13811 if (TYPE_CODE (exp->elts[*pos + 1].type) != TYPE_CODE_VOID)
13812 LA_PRINT_TYPE (exp->elts[*pos + 1].type, "", stream, 0, 0,
13813 &type_print_raw_options);
13817 print_subexp (exp, pos, stream, PREC_SUFFIX);
13818 fprintf_filtered (stream, "'%s", ada_attribute_name (op));
13823 for (tem = 1; tem < nargs; tem += 1)
13825 fputs_filtered ((tem == 1) ? " (" : ", ", stream);
13826 print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
13828 fputs_filtered (")", stream);
13833 type_print (exp->elts[pc + 1].type, "", stream, 0);
13834 fputs_filtered ("'(", stream);
13835 print_subexp (exp, pos, stream, PREC_PREFIX);
13836 fputs_filtered (")", stream);
13839 case UNOP_IN_RANGE:
13840 /* XXX: sprint_subexp */
13841 print_subexp (exp, pos, stream, PREC_SUFFIX);
13842 fputs_filtered (" in ", stream);
13843 LA_PRINT_TYPE (exp->elts[pc + 1].type, "", stream, 1, 0,
13844 &type_print_raw_options);
13847 case OP_DISCRETE_RANGE:
13848 print_subexp (exp, pos, stream, PREC_SUFFIX);
13849 fputs_filtered ("..", stream);
13850 print_subexp (exp, pos, stream, PREC_SUFFIX);
13854 fputs_filtered ("others => ", stream);
13855 print_subexp (exp, pos, stream, PREC_SUFFIX);
13859 for (i = 0; i < nargs-1; i += 1)
13862 fputs_filtered ("|", stream);
13863 print_subexp (exp, pos, stream, PREC_SUFFIX);
13865 fputs_filtered (" => ", stream);
13866 print_subexp (exp, pos, stream, PREC_SUFFIX);
13869 case OP_POSITIONAL:
13870 print_subexp (exp, pos, stream, PREC_SUFFIX);
13874 fputs_filtered ("(", stream);
13875 for (i = 0; i < nargs; i += 1)
13878 fputs_filtered (", ", stream);
13879 print_subexp (exp, pos, stream, PREC_SUFFIX);
13881 fputs_filtered (")", stream);
13886 /* Table mapping opcodes into strings for printing operators
13887 and precedences of the operators. */
13889 static const struct op_print ada_op_print_tab[] = {
13890 {":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
13891 {"or else", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
13892 {"and then", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
13893 {"or", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
13894 {"xor", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
13895 {"and", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
13896 {"=", BINOP_EQUAL, PREC_EQUAL, 0},
13897 {"/=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
13898 {"<=", BINOP_LEQ, PREC_ORDER, 0},
13899 {">=", BINOP_GEQ, PREC_ORDER, 0},
13900 {">", BINOP_GTR, PREC_ORDER, 0},
13901 {"<", BINOP_LESS, PREC_ORDER, 0},
13902 {">>", BINOP_RSH, PREC_SHIFT, 0},
13903 {"<<", BINOP_LSH, PREC_SHIFT, 0},
13904 {"+", BINOP_ADD, PREC_ADD, 0},
13905 {"-", BINOP_SUB, PREC_ADD, 0},
13906 {"&", BINOP_CONCAT, PREC_ADD, 0},
13907 {"*", BINOP_MUL, PREC_MUL, 0},
13908 {"/", BINOP_DIV, PREC_MUL, 0},
13909 {"rem", BINOP_REM, PREC_MUL, 0},
13910 {"mod", BINOP_MOD, PREC_MUL, 0},
13911 {"**", BINOP_EXP, PREC_REPEAT, 0},
13912 {"@", BINOP_REPEAT, PREC_REPEAT, 0},
13913 {"-", UNOP_NEG, PREC_PREFIX, 0},
13914 {"+", UNOP_PLUS, PREC_PREFIX, 0},
13915 {"not ", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
13916 {"not ", UNOP_COMPLEMENT, PREC_PREFIX, 0},
13917 {"abs ", UNOP_ABS, PREC_PREFIX, 0},
13918 {".all", UNOP_IND, PREC_SUFFIX, 1},
13919 {"'access", UNOP_ADDR, PREC_SUFFIX, 1},
13920 {"'size", OP_ATR_SIZE, PREC_SUFFIX, 1},
13921 {NULL, OP_NULL, PREC_SUFFIX, 0}
13924 enum ada_primitive_types {
13925 ada_primitive_type_int,
13926 ada_primitive_type_long,
13927 ada_primitive_type_short,
13928 ada_primitive_type_char,
13929 ada_primitive_type_float,
13930 ada_primitive_type_double,
13931 ada_primitive_type_void,
13932 ada_primitive_type_long_long,
13933 ada_primitive_type_long_double,
13934 ada_primitive_type_natural,
13935 ada_primitive_type_positive,
13936 ada_primitive_type_system_address,
13937 nr_ada_primitive_types
13941 ada_language_arch_info (struct gdbarch *gdbarch,
13942 struct language_arch_info *lai)
13944 const struct builtin_type *builtin = builtin_type (gdbarch);
13946 lai->primitive_type_vector
13947 = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_ada_primitive_types + 1,
13950 lai->primitive_type_vector [ada_primitive_type_int]
13951 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
13953 lai->primitive_type_vector [ada_primitive_type_long]
13954 = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
13955 0, "long_integer");
13956 lai->primitive_type_vector [ada_primitive_type_short]
13957 = arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch),
13958 0, "short_integer");
13959 lai->string_char_type
13960 = lai->primitive_type_vector [ada_primitive_type_char]
13961 = arch_character_type (gdbarch, TARGET_CHAR_BIT, 0, "character");
13962 lai->primitive_type_vector [ada_primitive_type_float]
13963 = arch_float_type (gdbarch, gdbarch_float_bit (gdbarch),
13964 "float", gdbarch_float_format (gdbarch));
13965 lai->primitive_type_vector [ada_primitive_type_double]
13966 = arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
13967 "long_float", gdbarch_double_format (gdbarch));
13968 lai->primitive_type_vector [ada_primitive_type_long_long]
13969 = arch_integer_type (gdbarch, gdbarch_long_long_bit (gdbarch),
13970 0, "long_long_integer");
13971 lai->primitive_type_vector [ada_primitive_type_long_double]
13972 = arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch),
13973 "long_long_float", gdbarch_long_double_format (gdbarch));
13974 lai->primitive_type_vector [ada_primitive_type_natural]
13975 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
13977 lai->primitive_type_vector [ada_primitive_type_positive]
13978 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
13980 lai->primitive_type_vector [ada_primitive_type_void]
13981 = builtin->builtin_void;
13983 lai->primitive_type_vector [ada_primitive_type_system_address]
13984 = lookup_pointer_type (arch_type (gdbarch, TYPE_CODE_VOID, 1, "void"));
13985 TYPE_NAME (lai->primitive_type_vector [ada_primitive_type_system_address])
13986 = "system__address";
13988 lai->bool_type_symbol = NULL;
13989 lai->bool_type_default = builtin->builtin_bool;
13992 /* Language vector */
13994 /* Not really used, but needed in the ada_language_defn. */
13997 emit_char (int c, struct type *type, struct ui_file *stream, int quoter)
13999 ada_emit_char (c, type, stream, quoter, 1);
14003 parse (struct parser_state *ps)
14005 warnings_issued = 0;
14006 return ada_parse (ps);
14009 static const struct exp_descriptor ada_exp_descriptor = {
14011 ada_operator_length,
14012 ada_operator_check,
14014 ada_dump_subexp_body,
14015 ada_evaluate_subexp
14018 /* Implement the "la_get_symbol_name_cmp" language_defn method
14021 static symbol_name_cmp_ftype
14022 ada_get_symbol_name_cmp (const char *lookup_name)
14024 if (should_use_wild_match (lookup_name))
14027 return compare_names;
14030 /* Implement the "la_read_var_value" language_defn method for Ada. */
14032 static struct value *
14033 ada_read_var_value (struct symbol *var, const struct block *var_block,
14034 struct frame_info *frame)
14036 const struct block *frame_block = NULL;
14037 struct symbol *renaming_sym = NULL;
14039 /* The only case where default_read_var_value is not sufficient
14040 is when VAR is a renaming... */
14042 frame_block = get_frame_block (frame, NULL);
14044 renaming_sym = ada_find_renaming_symbol (var, frame_block);
14045 if (renaming_sym != NULL)
14046 return ada_read_renaming_var_value (renaming_sym, frame_block);
14048 /* This is a typical case where we expect the default_read_var_value
14049 function to work. */
14050 return default_read_var_value (var, var_block, frame);
14053 static const char *ada_extensions[] =
14055 ".adb", ".ads", ".a", ".ada", ".dg", NULL
14058 const struct language_defn ada_language_defn = {
14059 "ada", /* Language name */
14063 case_sensitive_on, /* Yes, Ada is case-insensitive, but
14064 that's not quite what this means. */
14066 macro_expansion_no,
14068 &ada_exp_descriptor,
14072 ada_printchar, /* Print a character constant */
14073 ada_printstr, /* Function to print string constant */
14074 emit_char, /* Function to print single char (not used) */
14075 ada_print_type, /* Print a type using appropriate syntax */
14076 ada_print_typedef, /* Print a typedef using appropriate syntax */
14077 ada_val_print, /* Print a value using appropriate syntax */
14078 ada_value_print, /* Print a top-level value */
14079 ada_read_var_value, /* la_read_var_value */
14080 NULL, /* Language specific skip_trampoline */
14081 NULL, /* name_of_this */
14082 ada_lookup_symbol_nonlocal, /* Looking up non-local symbols. */
14083 basic_lookup_transparent_type, /* lookup_transparent_type */
14084 ada_la_decode, /* Language specific symbol demangler */
14085 ada_sniff_from_mangled_name,
14086 NULL, /* Language specific
14087 class_name_from_physname */
14088 ada_op_print_tab, /* expression operators for printing */
14089 0, /* c-style arrays */
14090 1, /* String lower bound */
14091 ada_get_gdb_completer_word_break_characters,
14092 ada_make_symbol_completion_list,
14093 ada_language_arch_info,
14094 ada_print_array_index,
14095 default_pass_by_reference,
14097 ada_get_symbol_name_cmp, /* la_get_symbol_name_cmp */
14098 ada_iterate_over_symbols,
14105 /* Provide a prototype to silence -Wmissing-prototypes. */
14106 extern initialize_file_ftype _initialize_ada_language;
14108 /* Command-list for the "set/show ada" prefix command. */
14109 static struct cmd_list_element *set_ada_list;
14110 static struct cmd_list_element *show_ada_list;
14112 /* Implement the "set ada" prefix command. */
14115 set_ada_command (char *arg, int from_tty)
14117 printf_unfiltered (_(\
14118 "\"set ada\" must be followed by the name of a setting.\n"));
14119 help_list (set_ada_list, "set ada ", all_commands, gdb_stdout);
14122 /* Implement the "show ada" prefix command. */
14125 show_ada_command (char *args, int from_tty)
14127 cmd_show_list (show_ada_list, from_tty, "");
14131 initialize_ada_catchpoint_ops (void)
14133 struct breakpoint_ops *ops;
14135 initialize_breakpoint_ops ();
14137 ops = &catch_exception_breakpoint_ops;
14138 *ops = bkpt_breakpoint_ops;
14139 ops->dtor = dtor_catch_exception;
14140 ops->allocate_location = allocate_location_catch_exception;
14141 ops->re_set = re_set_catch_exception;
14142 ops->check_status = check_status_catch_exception;
14143 ops->print_it = print_it_catch_exception;
14144 ops->print_one = print_one_catch_exception;
14145 ops->print_mention = print_mention_catch_exception;
14146 ops->print_recreate = print_recreate_catch_exception;
14148 ops = &catch_exception_unhandled_breakpoint_ops;
14149 *ops = bkpt_breakpoint_ops;
14150 ops->dtor = dtor_catch_exception_unhandled;
14151 ops->allocate_location = allocate_location_catch_exception_unhandled;
14152 ops->re_set = re_set_catch_exception_unhandled;
14153 ops->check_status = check_status_catch_exception_unhandled;
14154 ops->print_it = print_it_catch_exception_unhandled;
14155 ops->print_one = print_one_catch_exception_unhandled;
14156 ops->print_mention = print_mention_catch_exception_unhandled;
14157 ops->print_recreate = print_recreate_catch_exception_unhandled;
14159 ops = &catch_assert_breakpoint_ops;
14160 *ops = bkpt_breakpoint_ops;
14161 ops->dtor = dtor_catch_assert;
14162 ops->allocate_location = allocate_location_catch_assert;
14163 ops->re_set = re_set_catch_assert;
14164 ops->check_status = check_status_catch_assert;
14165 ops->print_it = print_it_catch_assert;
14166 ops->print_one = print_one_catch_assert;
14167 ops->print_mention = print_mention_catch_assert;
14168 ops->print_recreate = print_recreate_catch_assert;
14171 /* This module's 'new_objfile' observer. */
14174 ada_new_objfile_observer (struct objfile *objfile)
14176 ada_clear_symbol_cache ();
14179 /* This module's 'free_objfile' observer. */
14182 ada_free_objfile_observer (struct objfile *objfile)
14184 ada_clear_symbol_cache ();
14188 _initialize_ada_language (void)
14190 add_language (&ada_language_defn);
14192 initialize_ada_catchpoint_ops ();
14194 add_prefix_cmd ("ada", no_class, set_ada_command,
14195 _("Prefix command for changing Ada-specfic settings"),
14196 &set_ada_list, "set ada ", 0, &setlist);
14198 add_prefix_cmd ("ada", no_class, show_ada_command,
14199 _("Generic command for showing Ada-specific settings."),
14200 &show_ada_list, "show ada ", 0, &showlist);
14202 add_setshow_boolean_cmd ("trust-PAD-over-XVS", class_obscure,
14203 &trust_pad_over_xvs, _("\
14204 Enable or disable an optimization trusting PAD types over XVS types"), _("\
14205 Show whether an optimization trusting PAD types over XVS types is activated"),
14207 This is related to the encoding used by the GNAT compiler. The debugger\n\
14208 should normally trust the contents of PAD types, but certain older versions\n\
14209 of GNAT have a bug that sometimes causes the information in the PAD type\n\
14210 to be incorrect. Turning this setting \"off\" allows the debugger to\n\
14211 work around this bug. It is always safe to turn this option \"off\", but\n\
14212 this incurs a slight performance penalty, so it is recommended to NOT change\n\
14213 this option to \"off\" unless necessary."),
14214 NULL, NULL, &set_ada_list, &show_ada_list);
14216 add_setshow_boolean_cmd ("print-signatures", class_vars,
14217 &print_signatures, _("\
14218 Enable or disable the output of formal and return types for functions in the \
14219 overloads selection menu"), _("\
14220 Show whether the output of formal and return types for functions in the \
14221 overloads selection menu is activated"),
14222 NULL, NULL, NULL, &set_ada_list, &show_ada_list);
14224 add_catch_command ("exception", _("\
14225 Catch Ada exceptions, when raised.\n\
14226 With an argument, catch only exceptions with the given name."),
14227 catch_ada_exception_command,
14231 add_catch_command ("assert", _("\
14232 Catch failed Ada assertions, when raised.\n\
14233 With an argument, catch only exceptions with the given name."),
14234 catch_assert_command,
14239 varsize_limit = 65536;
14241 add_info ("exceptions", info_exceptions_command,
14243 List all Ada exception names.\n\
14244 If a regular expression is passed as an argument, only those matching\n\
14245 the regular expression are listed."));
14247 add_prefix_cmd ("ada", class_maintenance, maint_set_ada_cmd,
14248 _("Set Ada maintenance-related variables."),
14249 &maint_set_ada_cmdlist, "maintenance set ada ",
14250 0/*allow-unknown*/, &maintenance_set_cmdlist);
14252 add_prefix_cmd ("ada", class_maintenance, maint_show_ada_cmd,
14253 _("Show Ada maintenance-related variables"),
14254 &maint_show_ada_cmdlist, "maintenance show ada ",
14255 0/*allow-unknown*/, &maintenance_show_cmdlist);
14257 add_setshow_boolean_cmd
14258 ("ignore-descriptive-types", class_maintenance,
14259 &ada_ignore_descriptive_types_p,
14260 _("Set whether descriptive types generated by GNAT should be ignored."),
14261 _("Show whether descriptive types generated by GNAT should be ignored."),
14263 When enabled, the debugger will stop using the DW_AT_GNAT_descriptive_type\n\
14264 DWARF attribute."),
14265 NULL, NULL, &maint_set_ada_cmdlist, &maint_show_ada_cmdlist);
14267 obstack_init (&symbol_list_obstack);
14269 decoded_names_store = htab_create_alloc
14270 (256, htab_hash_string, (int (*)(const void *, const void *)) streq,
14271 NULL, xcalloc, xfree);
14273 /* The ada-lang observers. */
14274 observer_attach_new_objfile (ada_new_objfile_observer);
14275 observer_attach_free_objfile (ada_free_objfile_observer);
14276 observer_attach_inferior_exit (ada_inferior_exit);
14278 /* Setup various context-specific data. */
14280 = register_inferior_data_with_cleanup (NULL, ada_inferior_data_cleanup);
14281 ada_pspace_data_handle
14282 = register_program_space_data_with_cleanup (NULL, ada_pspace_data_cleanup);