1 /* Ada language support routines for GDB, the GNU debugger.
3 Copyright (C) 1992-2013 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/>. */
23 #include "gdb_string.h"
27 #include "gdb_regex.h"
32 #include "expression.h"
33 #include "parser-defs.h"
39 #include "breakpoint.h"
42 #include "gdb_obstack.h"
44 #include "completer.h"
51 #include "dictionary.h"
52 #include "exceptions.h"
60 #include "typeprint.h"
64 #include "mi/mi-common.h"
65 #include "arch-utils.h"
66 #include "exceptions.h"
67 #include "cli/cli-utils.h"
69 /* Define whether or not the C operator '/' truncates towards zero for
70 differently signed operands (truncation direction is undefined in C).
71 Copied from valarith.c. */
73 #ifndef TRUNCATION_TOWARDS_ZERO
74 #define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2)
77 static struct type *desc_base_type (struct type *);
79 static struct type *desc_bounds_type (struct type *);
81 static struct value *desc_bounds (struct value *);
83 static int fat_pntr_bounds_bitpos (struct type *);
85 static int fat_pntr_bounds_bitsize (struct type *);
87 static struct type *desc_data_target_type (struct type *);
89 static struct value *desc_data (struct value *);
91 static int fat_pntr_data_bitpos (struct type *);
93 static int fat_pntr_data_bitsize (struct type *);
95 static struct value *desc_one_bound (struct value *, int, int);
97 static int desc_bound_bitpos (struct type *, int, int);
99 static int desc_bound_bitsize (struct type *, int, int);
101 static struct type *desc_index_type (struct type *, int);
103 static int desc_arity (struct type *);
105 static int ada_type_match (struct type *, struct type *, int);
107 static int ada_args_match (struct symbol *, struct value **, int);
109 static int full_match (const char *, const char *);
111 static struct value *make_array_descriptor (struct type *, struct value *);
113 static void ada_add_block_symbols (struct obstack *,
114 struct block *, const char *,
115 domain_enum, struct objfile *, int);
117 static int is_nonfunction (struct ada_symbol_info *, int);
119 static void add_defn_to_vec (struct obstack *, struct symbol *,
122 static int num_defns_collected (struct obstack *);
124 static struct ada_symbol_info *defns_collected (struct obstack *, int);
126 static struct value *resolve_subexp (struct expression **, int *, int,
129 static void replace_operator_with_call (struct expression **, int, int, int,
130 struct symbol *, const struct block *);
132 static int possible_user_operator_p (enum exp_opcode, struct value **);
134 static char *ada_op_name (enum exp_opcode);
136 static const char *ada_decoded_op_name (enum exp_opcode);
138 static int numeric_type_p (struct type *);
140 static int integer_type_p (struct type *);
142 static int scalar_type_p (struct type *);
144 static int discrete_type_p (struct type *);
146 static enum ada_renaming_category parse_old_style_renaming (struct type *,
151 static struct symbol *find_old_style_renaming_symbol (const char *,
152 const struct block *);
154 static struct type *ada_lookup_struct_elt_type (struct type *, char *,
157 static struct value *evaluate_subexp_type (struct expression *, int *);
159 static struct type *ada_find_parallel_type_with_name (struct type *,
162 static int is_dynamic_field (struct type *, int);
164 static struct type *to_fixed_variant_branch_type (struct type *,
166 CORE_ADDR, struct value *);
168 static struct type *to_fixed_array_type (struct type *, struct value *, int);
170 static struct type *to_fixed_range_type (struct type *, struct value *);
172 static struct type *to_static_fixed_type (struct type *);
173 static struct type *static_unwrap_type (struct type *type);
175 static struct value *unwrap_value (struct value *);
177 static struct type *constrained_packed_array_type (struct type *, long *);
179 static struct type *decode_constrained_packed_array_type (struct type *);
181 static long decode_packed_array_bitsize (struct type *);
183 static struct value *decode_constrained_packed_array (struct value *);
185 static int ada_is_packed_array_type (struct type *);
187 static int ada_is_unconstrained_packed_array_type (struct type *);
189 static struct value *value_subscript_packed (struct value *, int,
192 static void move_bits (gdb_byte *, int, const gdb_byte *, int, int, int);
194 static struct value *coerce_unspec_val_to_type (struct value *,
197 static struct value *get_var_value (char *, char *);
199 static int lesseq_defined_than (struct symbol *, struct symbol *);
201 static int equiv_types (struct type *, struct type *);
203 static int is_name_suffix (const char *);
205 static int advance_wild_match (const char **, const char *, int);
207 static int wild_match (const char *, const char *);
209 static struct value *ada_coerce_ref (struct value *);
211 static LONGEST pos_atr (struct value *);
213 static struct value *value_pos_atr (struct type *, struct value *);
215 static struct value *value_val_atr (struct type *, struct value *);
217 static struct symbol *standard_lookup (const char *, const struct block *,
220 static struct value *ada_search_struct_field (char *, struct value *, int,
223 static struct value *ada_value_primitive_field (struct value *, int, int,
226 static int find_struct_field (const char *, struct type *, int,
227 struct type **, int *, int *, int *, int *);
229 static struct value *ada_to_fixed_value_create (struct type *, CORE_ADDR,
232 static int ada_resolve_function (struct ada_symbol_info *, int,
233 struct value **, int, const char *,
236 static int ada_is_direct_array_type (struct type *);
238 static void ada_language_arch_info (struct gdbarch *,
239 struct language_arch_info *);
241 static void check_size (const struct type *);
243 static struct value *ada_index_struct_field (int, struct value *, int,
246 static struct value *assign_aggregate (struct value *, struct value *,
250 static void aggregate_assign_from_choices (struct value *, struct value *,
252 int *, LONGEST *, int *,
253 int, LONGEST, LONGEST);
255 static void aggregate_assign_positional (struct value *, struct value *,
257 int *, LONGEST *, int *, int,
261 static void aggregate_assign_others (struct value *, struct value *,
263 int *, LONGEST *, int, LONGEST, LONGEST);
266 static void add_component_interval (LONGEST, LONGEST, LONGEST *, int *, int);
269 static struct value *ada_evaluate_subexp (struct type *, struct expression *,
272 static void ada_forward_operator_length (struct expression *, int, int *,
275 static struct type *ada_find_any_type (const char *name);
279 /* Maximum-sized dynamic type. */
280 static unsigned int varsize_limit;
282 /* FIXME: brobecker/2003-09-17: No longer a const because it is
283 returned by a function that does not return a const char *. */
284 static char *ada_completer_word_break_characters =
286 " \t\n!@#%^&*()+=|~`}{[]\";:?/,-";
288 " \t\n!@#$%^&*()+=|~`}{[]\";:?/,-";
291 /* The name of the symbol to use to get the name of the main subprogram. */
292 static const char ADA_MAIN_PROGRAM_SYMBOL_NAME[]
293 = "__gnat_ada_main_program_name";
295 /* Limit on the number of warnings to raise per expression evaluation. */
296 static int warning_limit = 2;
298 /* Number of warning messages issued; reset to 0 by cleanups after
299 expression evaluation. */
300 static int warnings_issued = 0;
302 static const char *known_runtime_file_name_patterns[] = {
303 ADA_KNOWN_RUNTIME_FILE_NAME_PATTERNS NULL
306 static const char *known_auxiliary_function_name_patterns[] = {
307 ADA_KNOWN_AUXILIARY_FUNCTION_NAME_PATTERNS NULL
310 /* Space for allocating results of ada_lookup_symbol_list. */
311 static struct obstack symbol_list_obstack;
313 /* Inferior-specific data. */
315 /* Per-inferior data for this module. */
317 struct ada_inferior_data
319 /* The ada__tags__type_specific_data type, which is used when decoding
320 tagged types. With older versions of GNAT, this type was directly
321 accessible through a component ("tsd") in the object tag. But this
322 is no longer the case, so we cache it for each inferior. */
323 struct type *tsd_type;
325 /* The exception_support_info data. This data is used to determine
326 how to implement support for Ada exception catchpoints in a given
328 const struct exception_support_info *exception_info;
331 /* Our key to this module's inferior data. */
332 static const struct inferior_data *ada_inferior_data;
334 /* A cleanup routine for our inferior data. */
336 ada_inferior_data_cleanup (struct inferior *inf, void *arg)
338 struct ada_inferior_data *data;
340 data = inferior_data (inf, ada_inferior_data);
345 /* Return our inferior data for the given inferior (INF).
347 This function always returns a valid pointer to an allocated
348 ada_inferior_data structure. If INF's inferior data has not
349 been previously set, this functions creates a new one with all
350 fields set to zero, sets INF's inferior to it, and then returns
351 a pointer to that newly allocated ada_inferior_data. */
353 static struct ada_inferior_data *
354 get_ada_inferior_data (struct inferior *inf)
356 struct ada_inferior_data *data;
358 data = inferior_data (inf, ada_inferior_data);
361 data = XZALLOC (struct ada_inferior_data);
362 set_inferior_data (inf, ada_inferior_data, data);
368 /* Perform all necessary cleanups regarding our module's inferior data
369 that is required after the inferior INF just exited. */
372 ada_inferior_exit (struct inferior *inf)
374 ada_inferior_data_cleanup (inf, NULL);
375 set_inferior_data (inf, ada_inferior_data, NULL);
380 /* If TYPE is a TYPE_CODE_TYPEDEF type, return the target type after
381 all typedef layers have been peeled. Otherwise, return TYPE.
383 Normally, we really expect a typedef type to only have 1 typedef layer.
384 In other words, we really expect the target type of a typedef type to be
385 a non-typedef type. This is particularly true for Ada units, because
386 the language does not have a typedef vs not-typedef distinction.
387 In that respect, the Ada compiler has been trying to eliminate as many
388 typedef definitions in the debugging information, since they generally
389 do not bring any extra information (we still use typedef under certain
390 circumstances related mostly to the GNAT encoding).
392 Unfortunately, we have seen situations where the debugging information
393 generated by the compiler leads to such multiple typedef layers. For
394 instance, consider the following example with stabs:
396 .stabs "pck__float_array___XUP:Tt(0,46)=s16P_ARRAY:(0,47)=[...]"[...]
397 .stabs "pck__float_array___XUP:t(0,36)=(0,46)",128,0,6,0
399 This is an error in the debugging information which causes type
400 pck__float_array___XUP to be defined twice, and the second time,
401 it is defined as a typedef of a typedef.
403 This is on the fringe of legality as far as debugging information is
404 concerned, and certainly unexpected. But it is easy to handle these
405 situations correctly, so we can afford to be lenient in this case. */
408 ada_typedef_target_type (struct type *type)
410 while (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
411 type = TYPE_TARGET_TYPE (type);
415 /* Given DECODED_NAME a string holding a symbol name in its
416 decoded form (ie using the Ada dotted notation), returns
417 its unqualified name. */
420 ada_unqualified_name (const char *decoded_name)
422 const char *result = strrchr (decoded_name, '.');
425 result++; /* Skip the dot... */
427 result = decoded_name;
432 /* Return a string starting with '<', followed by STR, and '>'.
433 The result is good until the next call. */
436 add_angle_brackets (const char *str)
438 static char *result = NULL;
441 result = xstrprintf ("<%s>", str);
446 ada_get_gdb_completer_word_break_characters (void)
448 return ada_completer_word_break_characters;
451 /* Print an array element index using the Ada syntax. */
454 ada_print_array_index (struct value *index_value, struct ui_file *stream,
455 const struct value_print_options *options)
457 LA_VALUE_PRINT (index_value, stream, options);
458 fprintf_filtered (stream, " => ");
461 /* Assuming VECT points to an array of *SIZE objects of size
462 ELEMENT_SIZE, grow it to contain at least MIN_SIZE objects,
463 updating *SIZE as necessary and returning the (new) array. */
466 grow_vect (void *vect, size_t *size, size_t min_size, int element_size)
468 if (*size < min_size)
471 if (*size < min_size)
473 vect = xrealloc (vect, *size * element_size);
478 /* True (non-zero) iff TARGET matches FIELD_NAME up to any trailing
479 suffix of FIELD_NAME beginning "___". */
482 field_name_match (const char *field_name, const char *target)
484 int len = strlen (target);
487 (strncmp (field_name, target, len) == 0
488 && (field_name[len] == '\0'
489 || (strncmp (field_name + len, "___", 3) == 0
490 && strcmp (field_name + strlen (field_name) - 6,
495 /* Assuming TYPE is a TYPE_CODE_STRUCT or a TYPE_CODE_TYPDEF to
496 a TYPE_CODE_STRUCT, find the field whose name matches FIELD_NAME,
497 and return its index. This function also handles fields whose name
498 have ___ suffixes because the compiler sometimes alters their name
499 by adding such a suffix to represent fields with certain constraints.
500 If the field could not be found, return a negative number if
501 MAYBE_MISSING is set. Otherwise raise an error. */
504 ada_get_field_index (const struct type *type, const char *field_name,
508 struct type *struct_type = check_typedef ((struct type *) type);
510 for (fieldno = 0; fieldno < TYPE_NFIELDS (struct_type); fieldno++)
511 if (field_name_match (TYPE_FIELD_NAME (struct_type, fieldno), field_name))
515 error (_("Unable to find field %s in struct %s. Aborting"),
516 field_name, TYPE_NAME (struct_type));
521 /* The length of the prefix of NAME prior to any "___" suffix. */
524 ada_name_prefix_len (const char *name)
530 const char *p = strstr (name, "___");
533 return strlen (name);
539 /* Return non-zero if SUFFIX is a suffix of STR.
540 Return zero if STR is null. */
543 is_suffix (const char *str, const char *suffix)
550 len2 = strlen (suffix);
551 return (len1 >= len2 && strcmp (str + len1 - len2, suffix) == 0);
554 /* The contents of value VAL, treated as a value of type TYPE. The
555 result is an lval in memory if VAL is. */
557 static struct value *
558 coerce_unspec_val_to_type (struct value *val, struct type *type)
560 type = ada_check_typedef (type);
561 if (value_type (val) == type)
565 struct value *result;
567 /* Make sure that the object size is not unreasonable before
568 trying to allocate some memory for it. */
572 || TYPE_LENGTH (type) > TYPE_LENGTH (value_type (val)))
573 result = allocate_value_lazy (type);
576 result = allocate_value (type);
577 memcpy (value_contents_raw (result), value_contents (val),
580 set_value_component_location (result, val);
581 set_value_bitsize (result, value_bitsize (val));
582 set_value_bitpos (result, value_bitpos (val));
583 set_value_address (result, value_address (val));
584 set_value_optimized_out (result, value_optimized_out_const (val));
589 static const gdb_byte *
590 cond_offset_host (const gdb_byte *valaddr, long offset)
595 return valaddr + offset;
599 cond_offset_target (CORE_ADDR address, long offset)
604 return address + offset;
607 /* Issue a warning (as for the definition of warning in utils.c, but
608 with exactly one argument rather than ...), unless the limit on the
609 number of warnings has passed during the evaluation of the current
612 /* FIXME: cagney/2004-10-10: This function is mimicking the behavior
613 provided by "complaint". */
614 static void lim_warning (const char *format, ...) ATTRIBUTE_PRINTF (1, 2);
617 lim_warning (const char *format, ...)
621 va_start (args, format);
622 warnings_issued += 1;
623 if (warnings_issued <= warning_limit)
624 vwarning (format, args);
629 /* Issue an error if the size of an object of type T is unreasonable,
630 i.e. if it would be a bad idea to allocate a value of this type in
634 check_size (const struct type *type)
636 if (TYPE_LENGTH (type) > varsize_limit)
637 error (_("object size is larger than varsize-limit"));
640 /* Maximum value of a SIZE-byte signed integer type. */
642 max_of_size (int size)
644 LONGEST top_bit = (LONGEST) 1 << (size * 8 - 2);
646 return top_bit | (top_bit - 1);
649 /* Minimum value of a SIZE-byte signed integer type. */
651 min_of_size (int size)
653 return -max_of_size (size) - 1;
656 /* Maximum value of a SIZE-byte unsigned integer type. */
658 umax_of_size (int size)
660 ULONGEST top_bit = (ULONGEST) 1 << (size * 8 - 1);
662 return top_bit | (top_bit - 1);
665 /* Maximum value of integral type T, as a signed quantity. */
667 max_of_type (struct type *t)
669 if (TYPE_UNSIGNED (t))
670 return (LONGEST) umax_of_size (TYPE_LENGTH (t));
672 return max_of_size (TYPE_LENGTH (t));
675 /* Minimum value of integral type T, as a signed quantity. */
677 min_of_type (struct type *t)
679 if (TYPE_UNSIGNED (t))
682 return min_of_size (TYPE_LENGTH (t));
685 /* The largest value in the domain of TYPE, a discrete type, as an integer. */
687 ada_discrete_type_high_bound (struct type *type)
689 switch (TYPE_CODE (type))
691 case TYPE_CODE_RANGE:
692 return TYPE_HIGH_BOUND (type);
694 return TYPE_FIELD_ENUMVAL (type, TYPE_NFIELDS (type) - 1);
699 return max_of_type (type);
701 error (_("Unexpected type in ada_discrete_type_high_bound."));
705 /* The smallest value in the domain of TYPE, a discrete type, as an integer. */
707 ada_discrete_type_low_bound (struct type *type)
709 switch (TYPE_CODE (type))
711 case TYPE_CODE_RANGE:
712 return TYPE_LOW_BOUND (type);
714 return TYPE_FIELD_ENUMVAL (type, 0);
719 return min_of_type (type);
721 error (_("Unexpected type in ada_discrete_type_low_bound."));
725 /* The identity on non-range types. For range types, the underlying
726 non-range scalar type. */
729 get_base_type (struct type *type)
731 while (type != NULL && TYPE_CODE (type) == TYPE_CODE_RANGE)
733 if (type == TYPE_TARGET_TYPE (type) || TYPE_TARGET_TYPE (type) == NULL)
735 type = TYPE_TARGET_TYPE (type);
740 /* Return a decoded version of the given VALUE. This means returning
741 a value whose type is obtained by applying all the GNAT-specific
742 encondings, making the resulting type a static but standard description
743 of the initial type. */
746 ada_get_decoded_value (struct value *value)
748 struct type *type = ada_check_typedef (value_type (value));
750 if (ada_is_array_descriptor_type (type)
751 || (ada_is_constrained_packed_array_type (type)
752 && TYPE_CODE (type) != TYPE_CODE_PTR))
754 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF) /* array access type. */
755 value = ada_coerce_to_simple_array_ptr (value);
757 value = ada_coerce_to_simple_array (value);
760 value = ada_to_fixed_value (value);
765 /* Same as ada_get_decoded_value, but with the given TYPE.
766 Because there is no associated actual value for this type,
767 the resulting type might be a best-effort approximation in
768 the case of dynamic types. */
771 ada_get_decoded_type (struct type *type)
773 type = to_static_fixed_type (type);
774 if (ada_is_constrained_packed_array_type (type))
775 type = ada_coerce_to_simple_array_type (type);
781 /* Language Selection */
783 /* If the main program is in Ada, return language_ada, otherwise return LANG
784 (the main program is in Ada iif the adainit symbol is found). */
787 ada_update_initial_language (enum language lang)
789 if (lookup_minimal_symbol ("adainit", (const char *) NULL,
790 (struct objfile *) NULL) != NULL)
796 /* If the main procedure is written in Ada, then return its name.
797 The result is good until the next call. Return NULL if the main
798 procedure doesn't appear to be in Ada. */
803 struct minimal_symbol *msym;
804 static char *main_program_name = NULL;
806 /* For Ada, the name of the main procedure is stored in a specific
807 string constant, generated by the binder. Look for that symbol,
808 extract its address, and then read that string. If we didn't find
809 that string, then most probably the main procedure is not written
811 msym = lookup_minimal_symbol (ADA_MAIN_PROGRAM_SYMBOL_NAME, NULL, NULL);
815 CORE_ADDR main_program_name_addr;
818 main_program_name_addr = SYMBOL_VALUE_ADDRESS (msym);
819 if (main_program_name_addr == 0)
820 error (_("Invalid address for Ada main program name."));
822 xfree (main_program_name);
823 target_read_string (main_program_name_addr, &main_program_name,
828 return main_program_name;
831 /* The main procedure doesn't seem to be in Ada. */
837 /* Table of Ada operators and their GNAT-encoded names. Last entry is pair
840 const struct ada_opname_map ada_opname_table[] = {
841 {"Oadd", "\"+\"", BINOP_ADD},
842 {"Osubtract", "\"-\"", BINOP_SUB},
843 {"Omultiply", "\"*\"", BINOP_MUL},
844 {"Odivide", "\"/\"", BINOP_DIV},
845 {"Omod", "\"mod\"", BINOP_MOD},
846 {"Orem", "\"rem\"", BINOP_REM},
847 {"Oexpon", "\"**\"", BINOP_EXP},
848 {"Olt", "\"<\"", BINOP_LESS},
849 {"Ole", "\"<=\"", BINOP_LEQ},
850 {"Ogt", "\">\"", BINOP_GTR},
851 {"Oge", "\">=\"", BINOP_GEQ},
852 {"Oeq", "\"=\"", BINOP_EQUAL},
853 {"One", "\"/=\"", BINOP_NOTEQUAL},
854 {"Oand", "\"and\"", BINOP_BITWISE_AND},
855 {"Oor", "\"or\"", BINOP_BITWISE_IOR},
856 {"Oxor", "\"xor\"", BINOP_BITWISE_XOR},
857 {"Oconcat", "\"&\"", BINOP_CONCAT},
858 {"Oabs", "\"abs\"", UNOP_ABS},
859 {"Onot", "\"not\"", UNOP_LOGICAL_NOT},
860 {"Oadd", "\"+\"", UNOP_PLUS},
861 {"Osubtract", "\"-\"", UNOP_NEG},
865 /* The "encoded" form of DECODED, according to GNAT conventions.
866 The result is valid until the next call to ada_encode. */
869 ada_encode (const char *decoded)
871 static char *encoding_buffer = NULL;
872 static size_t encoding_buffer_size = 0;
879 GROW_VECT (encoding_buffer, encoding_buffer_size,
880 2 * strlen (decoded) + 10);
883 for (p = decoded; *p != '\0'; p += 1)
887 encoding_buffer[k] = encoding_buffer[k + 1] = '_';
892 const struct ada_opname_map *mapping;
894 for (mapping = ada_opname_table;
895 mapping->encoded != NULL
896 && strncmp (mapping->decoded, p,
897 strlen (mapping->decoded)) != 0; mapping += 1)
899 if (mapping->encoded == NULL)
900 error (_("invalid Ada operator name: %s"), p);
901 strcpy (encoding_buffer + k, mapping->encoded);
902 k += strlen (mapping->encoded);
907 encoding_buffer[k] = *p;
912 encoding_buffer[k] = '\0';
913 return encoding_buffer;
916 /* Return NAME folded to lower case, or, if surrounded by single
917 quotes, unfolded, but with the quotes stripped away. Result good
921 ada_fold_name (const char *name)
923 static char *fold_buffer = NULL;
924 static size_t fold_buffer_size = 0;
926 int len = strlen (name);
927 GROW_VECT (fold_buffer, fold_buffer_size, len + 1);
931 strncpy (fold_buffer, name + 1, len - 2);
932 fold_buffer[len - 2] = '\000';
938 for (i = 0; i <= len; i += 1)
939 fold_buffer[i] = tolower (name[i]);
945 /* Return nonzero if C is either a digit or a lowercase alphabet character. */
948 is_lower_alphanum (const char c)
950 return (isdigit (c) || (isalpha (c) && islower (c)));
953 /* ENCODED is the linkage name of a symbol and LEN contains its length.
954 This function saves in LEN the length of that same symbol name but
955 without either of these suffixes:
961 These are suffixes introduced by the compiler for entities such as
962 nested subprogram for instance, in order to avoid name clashes.
963 They do not serve any purpose for the debugger. */
966 ada_remove_trailing_digits (const char *encoded, int *len)
968 if (*len > 1 && isdigit (encoded[*len - 1]))
972 while (i > 0 && isdigit (encoded[i]))
974 if (i >= 0 && encoded[i] == '.')
976 else if (i >= 0 && encoded[i] == '$')
978 else if (i >= 2 && strncmp (encoded + i - 2, "___", 3) == 0)
980 else if (i >= 1 && strncmp (encoded + i - 1, "__", 2) == 0)
985 /* Remove the suffix introduced by the compiler for protected object
989 ada_remove_po_subprogram_suffix (const char *encoded, int *len)
991 /* Remove trailing N. */
993 /* Protected entry subprograms are broken into two
994 separate subprograms: The first one is unprotected, and has
995 a 'N' suffix; the second is the protected version, and has
996 the 'P' suffix. The second calls the first one after handling
997 the protection. Since the P subprograms are internally generated,
998 we leave these names undecoded, giving the user a clue that this
999 entity is internal. */
1002 && encoded[*len - 1] == 'N'
1003 && (isdigit (encoded[*len - 2]) || islower (encoded[*len - 2])))
1007 /* Remove trailing X[bn]* suffixes (indicating names in package bodies). */
1010 ada_remove_Xbn_suffix (const char *encoded, int *len)
1014 while (i > 0 && (encoded[i] == 'b' || encoded[i] == 'n'))
1017 if (encoded[i] != 'X')
1023 if (isalnum (encoded[i-1]))
1027 /* If ENCODED follows the GNAT entity encoding conventions, then return
1028 the decoded form of ENCODED. Otherwise, return "<%s>" where "%s" is
1029 replaced by ENCODED.
1031 The resulting string is valid until the next call of ada_decode.
1032 If the string is unchanged by decoding, the original string pointer
1036 ada_decode (const char *encoded)
1043 static char *decoding_buffer = NULL;
1044 static size_t decoding_buffer_size = 0;
1046 /* The name of the Ada main procedure starts with "_ada_".
1047 This prefix is not part of the decoded name, so skip this part
1048 if we see this prefix. */
1049 if (strncmp (encoded, "_ada_", 5) == 0)
1052 /* If the name starts with '_', then it is not a properly encoded
1053 name, so do not attempt to decode it. Similarly, if the name
1054 starts with '<', the name should not be decoded. */
1055 if (encoded[0] == '_' || encoded[0] == '<')
1058 len0 = strlen (encoded);
1060 ada_remove_trailing_digits (encoded, &len0);
1061 ada_remove_po_subprogram_suffix (encoded, &len0);
1063 /* Remove the ___X.* suffix if present. Do not forget to verify that
1064 the suffix is located before the current "end" of ENCODED. We want
1065 to avoid re-matching parts of ENCODED that have previously been
1066 marked as discarded (by decrementing LEN0). */
1067 p = strstr (encoded, "___");
1068 if (p != NULL && p - encoded < len0 - 3)
1076 /* Remove any trailing TKB suffix. It tells us that this symbol
1077 is for the body of a task, but that information does not actually
1078 appear in the decoded name. */
1080 if (len0 > 3 && strncmp (encoded + len0 - 3, "TKB", 3) == 0)
1083 /* Remove any trailing TB suffix. The TB suffix is slightly different
1084 from the TKB suffix because it is used for non-anonymous task
1087 if (len0 > 2 && strncmp (encoded + len0 - 2, "TB", 2) == 0)
1090 /* Remove trailing "B" suffixes. */
1091 /* FIXME: brobecker/2006-04-19: Not sure what this are used for... */
1093 if (len0 > 1 && strncmp (encoded + len0 - 1, "B", 1) == 0)
1096 /* Make decoded big enough for possible expansion by operator name. */
1098 GROW_VECT (decoding_buffer, decoding_buffer_size, 2 * len0 + 1);
1099 decoded = decoding_buffer;
1101 /* Remove trailing __{digit}+ or trailing ${digit}+. */
1103 if (len0 > 1 && isdigit (encoded[len0 - 1]))
1106 while ((i >= 0 && isdigit (encoded[i]))
1107 || (i >= 1 && encoded[i] == '_' && isdigit (encoded[i - 1])))
1109 if (i > 1 && encoded[i] == '_' && encoded[i - 1] == '_')
1111 else if (encoded[i] == '$')
1115 /* The first few characters that are not alphabetic are not part
1116 of any encoding we use, so we can copy them over verbatim. */
1118 for (i = 0, j = 0; i < len0 && !isalpha (encoded[i]); i += 1, j += 1)
1119 decoded[j] = encoded[i];
1124 /* Is this a symbol function? */
1125 if (at_start_name && encoded[i] == 'O')
1129 for (k = 0; ada_opname_table[k].encoded != NULL; k += 1)
1131 int op_len = strlen (ada_opname_table[k].encoded);
1132 if ((strncmp (ada_opname_table[k].encoded + 1, encoded + i + 1,
1134 && !isalnum (encoded[i + op_len]))
1136 strcpy (decoded + j, ada_opname_table[k].decoded);
1139 j += strlen (ada_opname_table[k].decoded);
1143 if (ada_opname_table[k].encoded != NULL)
1148 /* Replace "TK__" with "__", which will eventually be translated
1149 into "." (just below). */
1151 if (i < len0 - 4 && strncmp (encoded + i, "TK__", 4) == 0)
1154 /* Replace "__B_{DIGITS}+__" sequences by "__", which will eventually
1155 be translated into "." (just below). These are internal names
1156 generated for anonymous blocks inside which our symbol is nested. */
1158 if (len0 - i > 5 && encoded [i] == '_' && encoded [i+1] == '_'
1159 && encoded [i+2] == 'B' && encoded [i+3] == '_'
1160 && isdigit (encoded [i+4]))
1164 while (k < len0 && isdigit (encoded[k]))
1165 k++; /* Skip any extra digit. */
1167 /* Double-check that the "__B_{DIGITS}+" sequence we found
1168 is indeed followed by "__". */
1169 if (len0 - k > 2 && encoded [k] == '_' && encoded [k+1] == '_')
1173 /* Remove _E{DIGITS}+[sb] */
1175 /* Just as for protected object subprograms, there are 2 categories
1176 of subprograms created by the compiler for each entry. The first
1177 one implements the actual entry code, and has a suffix following
1178 the convention above; the second one implements the barrier and
1179 uses the same convention as above, except that the 'E' is replaced
1182 Just as above, we do not decode the name of barrier functions
1183 to give the user a clue that the code he is debugging has been
1184 internally generated. */
1186 if (len0 - i > 3 && encoded [i] == '_' && encoded[i+1] == 'E'
1187 && isdigit (encoded[i+2]))
1191 while (k < len0 && isdigit (encoded[k]))
1195 && (encoded[k] == 'b' || encoded[k] == 's'))
1198 /* Just as an extra precaution, make sure that if this
1199 suffix is followed by anything else, it is a '_'.
1200 Otherwise, we matched this sequence by accident. */
1202 || (k < len0 && encoded[k] == '_'))
1207 /* Remove trailing "N" in [a-z0-9]+N__. The N is added by
1208 the GNAT front-end in protected object subprograms. */
1211 && encoded[i] == 'N' && encoded[i+1] == '_' && encoded[i+2] == '_')
1213 /* Backtrack a bit up until we reach either the begining of
1214 the encoded name, or "__". Make sure that we only find
1215 digits or lowercase characters. */
1216 const char *ptr = encoded + i - 1;
1218 while (ptr >= encoded && is_lower_alphanum (ptr[0]))
1221 || (ptr > encoded && ptr[0] == '_' && ptr[-1] == '_'))
1225 if (encoded[i] == 'X' && i != 0 && isalnum (encoded[i - 1]))
1227 /* This is a X[bn]* sequence not separated from the previous
1228 part of the name with a non-alpha-numeric character (in other
1229 words, immediately following an alpha-numeric character), then
1230 verify that it is placed at the end of the encoded name. If
1231 not, then the encoding is not valid and we should abort the
1232 decoding. Otherwise, just skip it, it is used in body-nested
1236 while (i < len0 && (encoded[i] == 'b' || encoded[i] == 'n'));
1240 else if (i < len0 - 2 && encoded[i] == '_' && encoded[i + 1] == '_')
1242 /* Replace '__' by '.'. */
1250 /* It's a character part of the decoded name, so just copy it
1252 decoded[j] = encoded[i];
1257 decoded[j] = '\000';
1259 /* Decoded names should never contain any uppercase character.
1260 Double-check this, and abort the decoding if we find one. */
1262 for (i = 0; decoded[i] != '\0'; i += 1)
1263 if (isupper (decoded[i]) || decoded[i] == ' ')
1266 if (strcmp (decoded, encoded) == 0)
1272 GROW_VECT (decoding_buffer, decoding_buffer_size, strlen (encoded) + 3);
1273 decoded = decoding_buffer;
1274 if (encoded[0] == '<')
1275 strcpy (decoded, encoded);
1277 xsnprintf (decoded, decoding_buffer_size, "<%s>", encoded);
1282 /* Table for keeping permanent unique copies of decoded names. Once
1283 allocated, names in this table are never released. While this is a
1284 storage leak, it should not be significant unless there are massive
1285 changes in the set of decoded names in successive versions of a
1286 symbol table loaded during a single session. */
1287 static struct htab *decoded_names_store;
1289 /* Returns the decoded name of GSYMBOL, as for ada_decode, caching it
1290 in the language-specific part of GSYMBOL, if it has not been
1291 previously computed. Tries to save the decoded name in the same
1292 obstack as GSYMBOL, if possible, and otherwise on the heap (so that,
1293 in any case, the decoded symbol has a lifetime at least that of
1295 The GSYMBOL parameter is "mutable" in the C++ sense: logically
1296 const, but nevertheless modified to a semantically equivalent form
1297 when a decoded name is cached in it. */
1300 ada_decode_symbol (const struct general_symbol_info *arg)
1302 struct general_symbol_info *gsymbol = (struct general_symbol_info *) arg;
1303 const char **resultp =
1304 &gsymbol->language_specific.mangled_lang.demangled_name;
1306 if (!gsymbol->ada_mangled)
1308 const char *decoded = ada_decode (gsymbol->name);
1309 struct obstack *obstack = gsymbol->language_specific.obstack;
1311 gsymbol->ada_mangled = 1;
1313 if (obstack != NULL)
1314 *resultp = obstack_copy0 (obstack, decoded, strlen (decoded));
1317 /* Sometimes, we can't find a corresponding objfile, in
1318 which case, we put the result on the heap. Since we only
1319 decode when needed, we hope this usually does not cause a
1320 significant memory leak (FIXME). */
1322 char **slot = (char **) htab_find_slot (decoded_names_store,
1326 *slot = xstrdup (decoded);
1335 ada_la_decode (const char *encoded, int options)
1337 return xstrdup (ada_decode (encoded));
1340 /* Returns non-zero iff SYM_NAME matches NAME, ignoring any trailing
1341 suffixes that encode debugging information or leading _ada_ on
1342 SYM_NAME (see is_name_suffix commentary for the debugging
1343 information that is ignored). If WILD, then NAME need only match a
1344 suffix of SYM_NAME minus the same suffixes. Also returns 0 if
1345 either argument is NULL. */
1348 match_name (const char *sym_name, const char *name, int wild)
1350 if (sym_name == NULL || name == NULL)
1353 return wild_match (sym_name, name) == 0;
1356 int len_name = strlen (name);
1358 return (strncmp (sym_name, name, len_name) == 0
1359 && is_name_suffix (sym_name + len_name))
1360 || (strncmp (sym_name, "_ada_", 5) == 0
1361 && strncmp (sym_name + 5, name, len_name) == 0
1362 && is_name_suffix (sym_name + len_name + 5));
1369 /* Assuming that INDEX_DESC_TYPE is an ___XA structure, a structure
1370 generated by the GNAT compiler to describe the index type used
1371 for each dimension of an array, check whether it follows the latest
1372 known encoding. If not, fix it up to conform to the latest encoding.
1373 Otherwise, do nothing. This function also does nothing if
1374 INDEX_DESC_TYPE is NULL.
1376 The GNAT encoding used to describle the array index type evolved a bit.
1377 Initially, the information would be provided through the name of each
1378 field of the structure type only, while the type of these fields was
1379 described as unspecified and irrelevant. The debugger was then expected
1380 to perform a global type lookup using the name of that field in order
1381 to get access to the full index type description. Because these global
1382 lookups can be very expensive, the encoding was later enhanced to make
1383 the global lookup unnecessary by defining the field type as being
1384 the full index type description.
1386 The purpose of this routine is to allow us to support older versions
1387 of the compiler by detecting the use of the older encoding, and by
1388 fixing up the INDEX_DESC_TYPE to follow the new one (at this point,
1389 we essentially replace each field's meaningless type by the associated
1393 ada_fixup_array_indexes_type (struct type *index_desc_type)
1397 if (index_desc_type == NULL)
1399 gdb_assert (TYPE_NFIELDS (index_desc_type) > 0);
1401 /* Check if INDEX_DESC_TYPE follows the older encoding (it is sufficient
1402 to check one field only, no need to check them all). If not, return
1405 If our INDEX_DESC_TYPE was generated using the older encoding,
1406 the field type should be a meaningless integer type whose name
1407 is not equal to the field name. */
1408 if (TYPE_NAME (TYPE_FIELD_TYPE (index_desc_type, 0)) != NULL
1409 && strcmp (TYPE_NAME (TYPE_FIELD_TYPE (index_desc_type, 0)),
1410 TYPE_FIELD_NAME (index_desc_type, 0)) == 0)
1413 /* Fixup each field of INDEX_DESC_TYPE. */
1414 for (i = 0; i < TYPE_NFIELDS (index_desc_type); i++)
1416 const char *name = TYPE_FIELD_NAME (index_desc_type, i);
1417 struct type *raw_type = ada_check_typedef (ada_find_any_type (name));
1420 TYPE_FIELD_TYPE (index_desc_type, i) = raw_type;
1424 /* Names of MAX_ADA_DIMENS bounds in P_BOUNDS fields of array descriptors. */
1426 static char *bound_name[] = {
1427 "LB0", "UB0", "LB1", "UB1", "LB2", "UB2", "LB3", "UB3",
1428 "LB4", "UB4", "LB5", "UB5", "LB6", "UB6", "LB7", "UB7"
1431 /* Maximum number of array dimensions we are prepared to handle. */
1433 #define MAX_ADA_DIMENS (sizeof(bound_name) / (2*sizeof(char *)))
1436 /* The desc_* routines return primitive portions of array descriptors
1439 /* The descriptor or array type, if any, indicated by TYPE; removes
1440 level of indirection, if needed. */
1442 static struct type *
1443 desc_base_type (struct type *type)
1447 type = ada_check_typedef (type);
1448 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
1449 type = ada_typedef_target_type (type);
1452 && (TYPE_CODE (type) == TYPE_CODE_PTR
1453 || TYPE_CODE (type) == TYPE_CODE_REF))
1454 return ada_check_typedef (TYPE_TARGET_TYPE (type));
1459 /* True iff TYPE indicates a "thin" array pointer type. */
1462 is_thin_pntr (struct type *type)
1465 is_suffix (ada_type_name (desc_base_type (type)), "___XUT")
1466 || is_suffix (ada_type_name (desc_base_type (type)), "___XUT___XVE");
1469 /* The descriptor type for thin pointer type TYPE. */
1471 static struct type *
1472 thin_descriptor_type (struct type *type)
1474 struct type *base_type = desc_base_type (type);
1476 if (base_type == NULL)
1478 if (is_suffix (ada_type_name (base_type), "___XVE"))
1482 struct type *alt_type = ada_find_parallel_type (base_type, "___XVE");
1484 if (alt_type == NULL)
1491 /* A pointer to the array data for thin-pointer value VAL. */
1493 static struct value *
1494 thin_data_pntr (struct value *val)
1496 struct type *type = ada_check_typedef (value_type (val));
1497 struct type *data_type = desc_data_target_type (thin_descriptor_type (type));
1499 data_type = lookup_pointer_type (data_type);
1501 if (TYPE_CODE (type) == TYPE_CODE_PTR)
1502 return value_cast (data_type, value_copy (val));
1504 return value_from_longest (data_type, value_address (val));
1507 /* True iff TYPE indicates a "thick" array pointer type. */
1510 is_thick_pntr (struct type *type)
1512 type = desc_base_type (type);
1513 return (type != NULL && TYPE_CODE (type) == TYPE_CODE_STRUCT
1514 && lookup_struct_elt_type (type, "P_BOUNDS", 1) != NULL);
1517 /* If TYPE is the type of an array descriptor (fat or thin pointer) or a
1518 pointer to one, the type of its bounds data; otherwise, NULL. */
1520 static struct type *
1521 desc_bounds_type (struct type *type)
1525 type = desc_base_type (type);
1529 else if (is_thin_pntr (type))
1531 type = thin_descriptor_type (type);
1534 r = lookup_struct_elt_type (type, "BOUNDS", 1);
1536 return ada_check_typedef (r);
1538 else if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
1540 r = lookup_struct_elt_type (type, "P_BOUNDS", 1);
1542 return ada_check_typedef (TYPE_TARGET_TYPE (ada_check_typedef (r)));
1547 /* If ARR is an array descriptor (fat or thin pointer), or pointer to
1548 one, a pointer to its bounds data. Otherwise NULL. */
1550 static struct value *
1551 desc_bounds (struct value *arr)
1553 struct type *type = ada_check_typedef (value_type (arr));
1555 if (is_thin_pntr (type))
1557 struct type *bounds_type =
1558 desc_bounds_type (thin_descriptor_type (type));
1561 if (bounds_type == NULL)
1562 error (_("Bad GNAT array descriptor"));
1564 /* NOTE: The following calculation is not really kosher, but
1565 since desc_type is an XVE-encoded type (and shouldn't be),
1566 the correct calculation is a real pain. FIXME (and fix GCC). */
1567 if (TYPE_CODE (type) == TYPE_CODE_PTR)
1568 addr = value_as_long (arr);
1570 addr = value_address (arr);
1573 value_from_longest (lookup_pointer_type (bounds_type),
1574 addr - TYPE_LENGTH (bounds_type));
1577 else if (is_thick_pntr (type))
1579 struct value *p_bounds = value_struct_elt (&arr, NULL, "P_BOUNDS", NULL,
1580 _("Bad GNAT array descriptor"));
1581 struct type *p_bounds_type = value_type (p_bounds);
1584 && TYPE_CODE (p_bounds_type) == TYPE_CODE_PTR)
1586 struct type *target_type = TYPE_TARGET_TYPE (p_bounds_type);
1588 if (TYPE_STUB (target_type))
1589 p_bounds = value_cast (lookup_pointer_type
1590 (ada_check_typedef (target_type)),
1594 error (_("Bad GNAT array descriptor"));
1602 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1603 position of the field containing the address of the bounds data. */
1606 fat_pntr_bounds_bitpos (struct type *type)
1608 return TYPE_FIELD_BITPOS (desc_base_type (type), 1);
1611 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1612 size of the field containing the address of the bounds data. */
1615 fat_pntr_bounds_bitsize (struct type *type)
1617 type = desc_base_type (type);
1619 if (TYPE_FIELD_BITSIZE (type, 1) > 0)
1620 return TYPE_FIELD_BITSIZE (type, 1);
1622 return 8 * TYPE_LENGTH (ada_check_typedef (TYPE_FIELD_TYPE (type, 1)));
1625 /* If TYPE is the type of an array descriptor (fat or thin pointer) or a
1626 pointer to one, the type of its array data (a array-with-no-bounds type);
1627 otherwise, NULL. Use ada_type_of_array to get an array type with bounds
1630 static struct type *
1631 desc_data_target_type (struct type *type)
1633 type = desc_base_type (type);
1635 /* NOTE: The following is bogus; see comment in desc_bounds. */
1636 if (is_thin_pntr (type))
1637 return desc_base_type (TYPE_FIELD_TYPE (thin_descriptor_type (type), 1));
1638 else if (is_thick_pntr (type))
1640 struct type *data_type = lookup_struct_elt_type (type, "P_ARRAY", 1);
1643 && TYPE_CODE (ada_check_typedef (data_type)) == TYPE_CODE_PTR)
1644 return ada_check_typedef (TYPE_TARGET_TYPE (data_type));
1650 /* If ARR is an array descriptor (fat or thin pointer), a pointer to
1653 static struct value *
1654 desc_data (struct value *arr)
1656 struct type *type = value_type (arr);
1658 if (is_thin_pntr (type))
1659 return thin_data_pntr (arr);
1660 else if (is_thick_pntr (type))
1661 return value_struct_elt (&arr, NULL, "P_ARRAY", NULL,
1662 _("Bad GNAT array descriptor"));
1668 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1669 position of the field containing the address of the data. */
1672 fat_pntr_data_bitpos (struct type *type)
1674 return TYPE_FIELD_BITPOS (desc_base_type (type), 0);
1677 /* If TYPE is the type of an array-descriptor (fat pointer), the bit
1678 size of the field containing the address of the data. */
1681 fat_pntr_data_bitsize (struct type *type)
1683 type = desc_base_type (type);
1685 if (TYPE_FIELD_BITSIZE (type, 0) > 0)
1686 return TYPE_FIELD_BITSIZE (type, 0);
1688 return TARGET_CHAR_BIT * TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0));
1691 /* If BOUNDS is an array-bounds structure (or pointer to one), return
1692 the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
1693 bound, if WHICH is 1. The first bound is I=1. */
1695 static struct value *
1696 desc_one_bound (struct value *bounds, int i, int which)
1698 return value_struct_elt (&bounds, NULL, bound_name[2 * i + which - 2], NULL,
1699 _("Bad GNAT array descriptor bounds"));
1702 /* If BOUNDS is an array-bounds structure type, return the bit position
1703 of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
1704 bound, if WHICH is 1. The first bound is I=1. */
1707 desc_bound_bitpos (struct type *type, int i, int which)
1709 return TYPE_FIELD_BITPOS (desc_base_type (type), 2 * i + which - 2);
1712 /* If BOUNDS is an array-bounds structure type, return the bit field size
1713 of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper
1714 bound, if WHICH is 1. The first bound is I=1. */
1717 desc_bound_bitsize (struct type *type, int i, int which)
1719 type = desc_base_type (type);
1721 if (TYPE_FIELD_BITSIZE (type, 2 * i + which - 2) > 0)
1722 return TYPE_FIELD_BITSIZE (type, 2 * i + which - 2);
1724 return 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (type, 2 * i + which - 2));
1727 /* If TYPE is the type of an array-bounds structure, the type of its
1728 Ith bound (numbering from 1). Otherwise, NULL. */
1730 static struct type *
1731 desc_index_type (struct type *type, int i)
1733 type = desc_base_type (type);
1735 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
1736 return lookup_struct_elt_type (type, bound_name[2 * i - 2], 1);
1741 /* The number of index positions in the array-bounds type TYPE.
1742 Return 0 if TYPE is NULL. */
1745 desc_arity (struct type *type)
1747 type = desc_base_type (type);
1750 return TYPE_NFIELDS (type) / 2;
1754 /* Non-zero iff TYPE is a simple array type (not a pointer to one) or
1755 an array descriptor type (representing an unconstrained array
1759 ada_is_direct_array_type (struct type *type)
1763 type = ada_check_typedef (type);
1764 return (TYPE_CODE (type) == TYPE_CODE_ARRAY
1765 || ada_is_array_descriptor_type (type));
1768 /* Non-zero iff TYPE represents any kind of array in Ada, or a pointer
1772 ada_is_array_type (struct type *type)
1775 && (TYPE_CODE (type) == TYPE_CODE_PTR
1776 || TYPE_CODE (type) == TYPE_CODE_REF))
1777 type = TYPE_TARGET_TYPE (type);
1778 return ada_is_direct_array_type (type);
1781 /* Non-zero iff TYPE is a simple array type or pointer to one. */
1784 ada_is_simple_array_type (struct type *type)
1788 type = ada_check_typedef (type);
1789 return (TYPE_CODE (type) == TYPE_CODE_ARRAY
1790 || (TYPE_CODE (type) == TYPE_CODE_PTR
1791 && TYPE_CODE (ada_check_typedef (TYPE_TARGET_TYPE (type)))
1792 == TYPE_CODE_ARRAY));
1795 /* Non-zero iff TYPE belongs to a GNAT array descriptor. */
1798 ada_is_array_descriptor_type (struct type *type)
1800 struct type *data_type = desc_data_target_type (type);
1804 type = ada_check_typedef (type);
1805 return (data_type != NULL
1806 && TYPE_CODE (data_type) == TYPE_CODE_ARRAY
1807 && desc_arity (desc_bounds_type (type)) > 0);
1810 /* Non-zero iff type is a partially mal-formed GNAT array
1811 descriptor. FIXME: This is to compensate for some problems with
1812 debugging output from GNAT. Re-examine periodically to see if it
1816 ada_is_bogus_array_descriptor (struct type *type)
1820 && TYPE_CODE (type) == TYPE_CODE_STRUCT
1821 && (lookup_struct_elt_type (type, "P_BOUNDS", 1) != NULL
1822 || lookup_struct_elt_type (type, "P_ARRAY", 1) != NULL)
1823 && !ada_is_array_descriptor_type (type);
1827 /* If ARR has a record type in the form of a standard GNAT array descriptor,
1828 (fat pointer) returns the type of the array data described---specifically,
1829 a pointer-to-array type. If BOUNDS is non-zero, the bounds data are filled
1830 in from the descriptor; otherwise, they are left unspecified. If
1831 the ARR denotes a null array descriptor and BOUNDS is non-zero,
1832 returns NULL. The result is simply the type of ARR if ARR is not
1835 ada_type_of_array (struct value *arr, int bounds)
1837 if (ada_is_constrained_packed_array_type (value_type (arr)))
1838 return decode_constrained_packed_array_type (value_type (arr));
1840 if (!ada_is_array_descriptor_type (value_type (arr)))
1841 return value_type (arr);
1845 struct type *array_type =
1846 ada_check_typedef (desc_data_target_type (value_type (arr)));
1848 if (ada_is_unconstrained_packed_array_type (value_type (arr)))
1849 TYPE_FIELD_BITSIZE (array_type, 0) =
1850 decode_packed_array_bitsize (value_type (arr));
1856 struct type *elt_type;
1858 struct value *descriptor;
1860 elt_type = ada_array_element_type (value_type (arr), -1);
1861 arity = ada_array_arity (value_type (arr));
1863 if (elt_type == NULL || arity == 0)
1864 return ada_check_typedef (value_type (arr));
1866 descriptor = desc_bounds (arr);
1867 if (value_as_long (descriptor) == 0)
1871 struct type *range_type = alloc_type_copy (value_type (arr));
1872 struct type *array_type = alloc_type_copy (value_type (arr));
1873 struct value *low = desc_one_bound (descriptor, arity, 0);
1874 struct value *high = desc_one_bound (descriptor, arity, 1);
1877 create_range_type (range_type, value_type (low),
1878 longest_to_int (value_as_long (low)),
1879 longest_to_int (value_as_long (high)));
1880 elt_type = create_array_type (array_type, elt_type, range_type);
1882 if (ada_is_unconstrained_packed_array_type (value_type (arr)))
1884 /* We need to store the element packed bitsize, as well as
1885 recompute the array size, because it was previously
1886 computed based on the unpacked element size. */
1887 LONGEST lo = value_as_long (low);
1888 LONGEST hi = value_as_long (high);
1890 TYPE_FIELD_BITSIZE (elt_type, 0) =
1891 decode_packed_array_bitsize (value_type (arr));
1892 /* If the array has no element, then the size is already
1893 zero, and does not need to be recomputed. */
1897 (hi - lo + 1) * TYPE_FIELD_BITSIZE (elt_type, 0);
1899 TYPE_LENGTH (array_type) = (array_bitsize + 7) / 8;
1904 return lookup_pointer_type (elt_type);
1908 /* If ARR does not represent an array, returns ARR unchanged.
1909 Otherwise, returns either a standard GDB array with bounds set
1910 appropriately or, if ARR is a non-null fat pointer, a pointer to a standard
1911 GDB array. Returns NULL if ARR is a null fat pointer. */
1914 ada_coerce_to_simple_array_ptr (struct value *arr)
1916 if (ada_is_array_descriptor_type (value_type (arr)))
1918 struct type *arrType = ada_type_of_array (arr, 1);
1920 if (arrType == NULL)
1922 return value_cast (arrType, value_copy (desc_data (arr)));
1924 else if (ada_is_constrained_packed_array_type (value_type (arr)))
1925 return decode_constrained_packed_array (arr);
1930 /* If ARR does not represent an array, returns ARR unchanged.
1931 Otherwise, returns a standard GDB array describing ARR (which may
1932 be ARR itself if it already is in the proper form). */
1935 ada_coerce_to_simple_array (struct value *arr)
1937 if (ada_is_array_descriptor_type (value_type (arr)))
1939 struct value *arrVal = ada_coerce_to_simple_array_ptr (arr);
1942 error (_("Bounds unavailable for null array pointer."));
1943 check_size (TYPE_TARGET_TYPE (value_type (arrVal)));
1944 return value_ind (arrVal);
1946 else if (ada_is_constrained_packed_array_type (value_type (arr)))
1947 return decode_constrained_packed_array (arr);
1952 /* If TYPE represents a GNAT array type, return it translated to an
1953 ordinary GDB array type (possibly with BITSIZE fields indicating
1954 packing). For other types, is the identity. */
1957 ada_coerce_to_simple_array_type (struct type *type)
1959 if (ada_is_constrained_packed_array_type (type))
1960 return decode_constrained_packed_array_type (type);
1962 if (ada_is_array_descriptor_type (type))
1963 return ada_check_typedef (desc_data_target_type (type));
1968 /* Non-zero iff TYPE represents a standard GNAT packed-array type. */
1971 ada_is_packed_array_type (struct type *type)
1975 type = desc_base_type (type);
1976 type = ada_check_typedef (type);
1978 ada_type_name (type) != NULL
1979 && strstr (ada_type_name (type), "___XP") != NULL;
1982 /* Non-zero iff TYPE represents a standard GNAT constrained
1983 packed-array type. */
1986 ada_is_constrained_packed_array_type (struct type *type)
1988 return ada_is_packed_array_type (type)
1989 && !ada_is_array_descriptor_type (type);
1992 /* Non-zero iff TYPE represents an array descriptor for a
1993 unconstrained packed-array type. */
1996 ada_is_unconstrained_packed_array_type (struct type *type)
1998 return ada_is_packed_array_type (type)
1999 && ada_is_array_descriptor_type (type);
2002 /* Given that TYPE encodes a packed array type (constrained or unconstrained),
2003 return the size of its elements in bits. */
2006 decode_packed_array_bitsize (struct type *type)
2008 const char *raw_name;
2012 /* Access to arrays implemented as fat pointers are encoded as a typedef
2013 of the fat pointer type. We need the name of the fat pointer type
2014 to do the decoding, so strip the typedef layer. */
2015 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
2016 type = ada_typedef_target_type (type);
2018 raw_name = ada_type_name (ada_check_typedef (type));
2020 raw_name = ada_type_name (desc_base_type (type));
2025 tail = strstr (raw_name, "___XP");
2026 gdb_assert (tail != NULL);
2028 if (sscanf (tail + sizeof ("___XP") - 1, "%ld", &bits) != 1)
2031 (_("could not understand bit size information on packed array"));
2038 /* Given that TYPE is a standard GDB array type with all bounds filled
2039 in, and that the element size of its ultimate scalar constituents
2040 (that is, either its elements, or, if it is an array of arrays, its
2041 elements' elements, etc.) is *ELT_BITS, return an identical type,
2042 but with the bit sizes of its elements (and those of any
2043 constituent arrays) recorded in the BITSIZE components of its
2044 TYPE_FIELD_BITSIZE values, and with *ELT_BITS set to its total size
2047 static struct type *
2048 constrained_packed_array_type (struct type *type, long *elt_bits)
2050 struct type *new_elt_type;
2051 struct type *new_type;
2052 struct type *index_type_desc;
2053 struct type *index_type;
2054 LONGEST low_bound, high_bound;
2056 type = ada_check_typedef (type);
2057 if (TYPE_CODE (type) != TYPE_CODE_ARRAY)
2060 index_type_desc = ada_find_parallel_type (type, "___XA");
2061 if (index_type_desc)
2062 index_type = to_fixed_range_type (TYPE_FIELD_TYPE (index_type_desc, 0),
2065 index_type = TYPE_INDEX_TYPE (type);
2067 new_type = alloc_type_copy (type);
2069 constrained_packed_array_type (ada_check_typedef (TYPE_TARGET_TYPE (type)),
2071 create_array_type (new_type, new_elt_type, index_type);
2072 TYPE_FIELD_BITSIZE (new_type, 0) = *elt_bits;
2073 TYPE_NAME (new_type) = ada_type_name (type);
2075 if (get_discrete_bounds (index_type, &low_bound, &high_bound) < 0)
2076 low_bound = high_bound = 0;
2077 if (high_bound < low_bound)
2078 *elt_bits = TYPE_LENGTH (new_type) = 0;
2081 *elt_bits *= (high_bound - low_bound + 1);
2082 TYPE_LENGTH (new_type) =
2083 (*elt_bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT;
2086 TYPE_FIXED_INSTANCE (new_type) = 1;
2090 /* The array type encoded by TYPE, where
2091 ada_is_constrained_packed_array_type (TYPE). */
2093 static struct type *
2094 decode_constrained_packed_array_type (struct type *type)
2096 const char *raw_name = ada_type_name (ada_check_typedef (type));
2099 struct type *shadow_type;
2103 raw_name = ada_type_name (desc_base_type (type));
2108 name = (char *) alloca (strlen (raw_name) + 1);
2109 tail = strstr (raw_name, "___XP");
2110 type = desc_base_type (type);
2112 memcpy (name, raw_name, tail - raw_name);
2113 name[tail - raw_name] = '\000';
2115 shadow_type = ada_find_parallel_type_with_name (type, name);
2117 if (shadow_type == NULL)
2119 lim_warning (_("could not find bounds information on packed array"));
2122 CHECK_TYPEDEF (shadow_type);
2124 if (TYPE_CODE (shadow_type) != TYPE_CODE_ARRAY)
2126 lim_warning (_("could not understand bounds "
2127 "information on packed array"));
2131 bits = decode_packed_array_bitsize (type);
2132 return constrained_packed_array_type (shadow_type, &bits);
2135 /* Given that ARR is a struct value *indicating a GNAT constrained packed
2136 array, returns a simple array that denotes that array. Its type is a
2137 standard GDB array type except that the BITSIZEs of the array
2138 target types are set to the number of bits in each element, and the
2139 type length is set appropriately. */
2141 static struct value *
2142 decode_constrained_packed_array (struct value *arr)
2146 arr = ada_coerce_ref (arr);
2148 /* If our value is a pointer, then dererence it. Make sure that
2149 this operation does not cause the target type to be fixed, as
2150 this would indirectly cause this array to be decoded. The rest
2151 of the routine assumes that the array hasn't been decoded yet,
2152 so we use the basic "value_ind" routine to perform the dereferencing,
2153 as opposed to using "ada_value_ind". */
2154 if (TYPE_CODE (ada_check_typedef (value_type (arr))) == TYPE_CODE_PTR)
2155 arr = value_ind (arr);
2157 type = decode_constrained_packed_array_type (value_type (arr));
2160 error (_("can't unpack array"));
2164 if (gdbarch_bits_big_endian (get_type_arch (value_type (arr)))
2165 && ada_is_modular_type (value_type (arr)))
2167 /* This is a (right-justified) modular type representing a packed
2168 array with no wrapper. In order to interpret the value through
2169 the (left-justified) packed array type we just built, we must
2170 first left-justify it. */
2171 int bit_size, bit_pos;
2174 mod = ada_modulus (value_type (arr)) - 1;
2181 bit_pos = HOST_CHAR_BIT * TYPE_LENGTH (value_type (arr)) - bit_size;
2182 arr = ada_value_primitive_packed_val (arr, NULL,
2183 bit_pos / HOST_CHAR_BIT,
2184 bit_pos % HOST_CHAR_BIT,
2189 return coerce_unspec_val_to_type (arr, type);
2193 /* The value of the element of packed array ARR at the ARITY indices
2194 given in IND. ARR must be a simple array. */
2196 static struct value *
2197 value_subscript_packed (struct value *arr, int arity, struct value **ind)
2200 int bits, elt_off, bit_off;
2201 long elt_total_bit_offset;
2202 struct type *elt_type;
2206 elt_total_bit_offset = 0;
2207 elt_type = ada_check_typedef (value_type (arr));
2208 for (i = 0; i < arity; i += 1)
2210 if (TYPE_CODE (elt_type) != TYPE_CODE_ARRAY
2211 || TYPE_FIELD_BITSIZE (elt_type, 0) == 0)
2213 (_("attempt to do packed indexing of "
2214 "something other than a packed array"));
2217 struct type *range_type = TYPE_INDEX_TYPE (elt_type);
2218 LONGEST lowerbound, upperbound;
2221 if (get_discrete_bounds (range_type, &lowerbound, &upperbound) < 0)
2223 lim_warning (_("don't know bounds of array"));
2224 lowerbound = upperbound = 0;
2227 idx = pos_atr (ind[i]);
2228 if (idx < lowerbound || idx > upperbound)
2229 lim_warning (_("packed array index %ld out of bounds"),
2231 bits = TYPE_FIELD_BITSIZE (elt_type, 0);
2232 elt_total_bit_offset += (idx - lowerbound) * bits;
2233 elt_type = ada_check_typedef (TYPE_TARGET_TYPE (elt_type));
2236 elt_off = elt_total_bit_offset / HOST_CHAR_BIT;
2237 bit_off = elt_total_bit_offset % HOST_CHAR_BIT;
2239 v = ada_value_primitive_packed_val (arr, NULL, elt_off, bit_off,
2244 /* Non-zero iff TYPE includes negative integer values. */
2247 has_negatives (struct type *type)
2249 switch (TYPE_CODE (type))
2254 return !TYPE_UNSIGNED (type);
2255 case TYPE_CODE_RANGE:
2256 return TYPE_LOW_BOUND (type) < 0;
2261 /* Create a new value of type TYPE from the contents of OBJ starting
2262 at byte OFFSET, and bit offset BIT_OFFSET within that byte,
2263 proceeding for BIT_SIZE bits. If OBJ is an lval in memory, then
2264 assigning through the result will set the field fetched from.
2265 VALADDR is ignored unless OBJ is NULL, in which case,
2266 VALADDR+OFFSET must address the start of storage containing the
2267 packed value. The value returned in this case is never an lval.
2268 Assumes 0 <= BIT_OFFSET < HOST_CHAR_BIT. */
2271 ada_value_primitive_packed_val (struct value *obj, const gdb_byte *valaddr,
2272 long offset, int bit_offset, int bit_size,
2276 int src, /* Index into the source area */
2277 targ, /* Index into the target area */
2278 srcBitsLeft, /* Number of source bits left to move */
2279 nsrc, ntarg, /* Number of source and target bytes */
2280 unusedLS, /* Number of bits in next significant
2281 byte of source that are unused */
2282 accumSize; /* Number of meaningful bits in accum */
2283 unsigned char *bytes; /* First byte containing data to unpack */
2284 unsigned char *unpacked;
2285 unsigned long accum; /* Staging area for bits being transferred */
2287 int len = (bit_size + bit_offset + HOST_CHAR_BIT - 1) / 8;
2288 /* Transmit bytes from least to most significant; delta is the direction
2289 the indices move. */
2290 int delta = gdbarch_bits_big_endian (get_type_arch (type)) ? -1 : 1;
2292 type = ada_check_typedef (type);
2296 v = allocate_value (type);
2297 bytes = (unsigned char *) (valaddr + offset);
2299 else if (VALUE_LVAL (obj) == lval_memory && value_lazy (obj))
2301 v = value_at (type, value_address (obj));
2302 bytes = (unsigned char *) alloca (len);
2303 read_memory (value_address (v) + offset, bytes, len);
2307 v = allocate_value (type);
2308 bytes = (unsigned char *) value_contents (obj) + offset;
2313 long new_offset = offset;
2315 set_value_component_location (v, obj);
2316 set_value_bitpos (v, bit_offset + value_bitpos (obj));
2317 set_value_bitsize (v, bit_size);
2318 if (value_bitpos (v) >= HOST_CHAR_BIT)
2321 set_value_bitpos (v, value_bitpos (v) - HOST_CHAR_BIT);
2323 set_value_offset (v, new_offset);
2325 /* Also set the parent value. This is needed when trying to
2326 assign a new value (in inferior memory). */
2327 set_value_parent (v, obj);
2330 set_value_bitsize (v, bit_size);
2331 unpacked = (unsigned char *) value_contents (v);
2333 srcBitsLeft = bit_size;
2335 ntarg = TYPE_LENGTH (type);
2339 memset (unpacked, 0, TYPE_LENGTH (type));
2342 else if (gdbarch_bits_big_endian (get_type_arch (type)))
2345 if (has_negatives (type)
2346 && ((bytes[0] << bit_offset) & (1 << (HOST_CHAR_BIT - 1))))
2350 (HOST_CHAR_BIT - (bit_size + bit_offset) % HOST_CHAR_BIT)
2353 switch (TYPE_CODE (type))
2355 case TYPE_CODE_ARRAY:
2356 case TYPE_CODE_UNION:
2357 case TYPE_CODE_STRUCT:
2358 /* Non-scalar values must be aligned at a byte boundary... */
2360 (HOST_CHAR_BIT - bit_size % HOST_CHAR_BIT) % HOST_CHAR_BIT;
2361 /* ... And are placed at the beginning (most-significant) bytes
2363 targ = (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT - 1;
2368 targ = TYPE_LENGTH (type) - 1;
2374 int sign_bit_offset = (bit_size + bit_offset - 1) % 8;
2377 unusedLS = bit_offset;
2380 if (has_negatives (type) && (bytes[len - 1] & (1 << sign_bit_offset)))
2387 /* Mask for removing bits of the next source byte that are not
2388 part of the value. */
2389 unsigned int unusedMSMask =
2390 (1 << (srcBitsLeft >= HOST_CHAR_BIT ? HOST_CHAR_BIT : srcBitsLeft)) -
2392 /* Sign-extend bits for this byte. */
2393 unsigned int signMask = sign & ~unusedMSMask;
2396 (((bytes[src] >> unusedLS) & unusedMSMask) | signMask) << accumSize;
2397 accumSize += HOST_CHAR_BIT - unusedLS;
2398 if (accumSize >= HOST_CHAR_BIT)
2400 unpacked[targ] = accum & ~(~0L << HOST_CHAR_BIT);
2401 accumSize -= HOST_CHAR_BIT;
2402 accum >>= HOST_CHAR_BIT;
2406 srcBitsLeft -= HOST_CHAR_BIT - unusedLS;
2413 accum |= sign << accumSize;
2414 unpacked[targ] = accum & ~(~0L << HOST_CHAR_BIT);
2415 accumSize -= HOST_CHAR_BIT;
2416 accum >>= HOST_CHAR_BIT;
2424 /* Move N bits from SOURCE, starting at bit offset SRC_OFFSET to
2425 TARGET, starting at bit offset TARG_OFFSET. SOURCE and TARGET must
2428 move_bits (gdb_byte *target, int targ_offset, const gdb_byte *source,
2429 int src_offset, int n, int bits_big_endian_p)
2431 unsigned int accum, mask;
2432 int accum_bits, chunk_size;
2434 target += targ_offset / HOST_CHAR_BIT;
2435 targ_offset %= HOST_CHAR_BIT;
2436 source += src_offset / HOST_CHAR_BIT;
2437 src_offset %= HOST_CHAR_BIT;
2438 if (bits_big_endian_p)
2440 accum = (unsigned char) *source;
2442 accum_bits = HOST_CHAR_BIT - src_offset;
2448 accum = (accum << HOST_CHAR_BIT) + (unsigned char) *source;
2449 accum_bits += HOST_CHAR_BIT;
2451 chunk_size = HOST_CHAR_BIT - targ_offset;
2454 unused_right = HOST_CHAR_BIT - (chunk_size + targ_offset);
2455 mask = ((1 << chunk_size) - 1) << unused_right;
2458 | ((accum >> (accum_bits - chunk_size - unused_right)) & mask);
2460 accum_bits -= chunk_size;
2467 accum = (unsigned char) *source >> src_offset;
2469 accum_bits = HOST_CHAR_BIT - src_offset;
2473 accum = accum + ((unsigned char) *source << accum_bits);
2474 accum_bits += HOST_CHAR_BIT;
2476 chunk_size = HOST_CHAR_BIT - targ_offset;
2479 mask = ((1 << chunk_size) - 1) << targ_offset;
2480 *target = (*target & ~mask) | ((accum << targ_offset) & mask);
2482 accum_bits -= chunk_size;
2483 accum >>= chunk_size;
2490 /* Store the contents of FROMVAL into the location of TOVAL.
2491 Return a new value with the location of TOVAL and contents of
2492 FROMVAL. Handles assignment into packed fields that have
2493 floating-point or non-scalar types. */
2495 static struct value *
2496 ada_value_assign (struct value *toval, struct value *fromval)
2498 struct type *type = value_type (toval);
2499 int bits = value_bitsize (toval);
2501 toval = ada_coerce_ref (toval);
2502 fromval = ada_coerce_ref (fromval);
2504 if (ada_is_direct_array_type (value_type (toval)))
2505 toval = ada_coerce_to_simple_array (toval);
2506 if (ada_is_direct_array_type (value_type (fromval)))
2507 fromval = ada_coerce_to_simple_array (fromval);
2509 if (!deprecated_value_modifiable (toval))
2510 error (_("Left operand of assignment is not a modifiable lvalue."));
2512 if (VALUE_LVAL (toval) == lval_memory
2514 && (TYPE_CODE (type) == TYPE_CODE_FLT
2515 || TYPE_CODE (type) == TYPE_CODE_STRUCT))
2517 int len = (value_bitpos (toval)
2518 + bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT;
2520 gdb_byte *buffer = alloca (len);
2522 CORE_ADDR to_addr = value_address (toval);
2524 if (TYPE_CODE (type) == TYPE_CODE_FLT)
2525 fromval = value_cast (type, fromval);
2527 read_memory (to_addr, buffer, len);
2528 from_size = value_bitsize (fromval);
2530 from_size = TYPE_LENGTH (value_type (fromval)) * TARGET_CHAR_BIT;
2531 if (gdbarch_bits_big_endian (get_type_arch (type)))
2532 move_bits (buffer, value_bitpos (toval),
2533 value_contents (fromval), from_size - bits, bits, 1);
2535 move_bits (buffer, value_bitpos (toval),
2536 value_contents (fromval), 0, bits, 0);
2537 write_memory_with_notification (to_addr, buffer, len);
2539 val = value_copy (toval);
2540 memcpy (value_contents_raw (val), value_contents (fromval),
2541 TYPE_LENGTH (type));
2542 deprecated_set_value_type (val, type);
2547 return value_assign (toval, fromval);
2551 /* Given that COMPONENT is a memory lvalue that is part of the lvalue
2552 * CONTAINER, assign the contents of VAL to COMPONENTS's place in
2553 * CONTAINER. Modifies the VALUE_CONTENTS of CONTAINER only, not
2554 * COMPONENT, and not the inferior's memory. The current contents
2555 * of COMPONENT are ignored. */
2557 value_assign_to_component (struct value *container, struct value *component,
2560 LONGEST offset_in_container =
2561 (LONGEST) (value_address (component) - value_address (container));
2562 int bit_offset_in_container =
2563 value_bitpos (component) - value_bitpos (container);
2566 val = value_cast (value_type (component), val);
2568 if (value_bitsize (component) == 0)
2569 bits = TARGET_CHAR_BIT * TYPE_LENGTH (value_type (component));
2571 bits = value_bitsize (component);
2573 if (gdbarch_bits_big_endian (get_type_arch (value_type (container))))
2574 move_bits (value_contents_writeable (container) + offset_in_container,
2575 value_bitpos (container) + bit_offset_in_container,
2576 value_contents (val),
2577 TYPE_LENGTH (value_type (component)) * TARGET_CHAR_BIT - bits,
2580 move_bits (value_contents_writeable (container) + offset_in_container,
2581 value_bitpos (container) + bit_offset_in_container,
2582 value_contents (val), 0, bits, 0);
2585 /* The value of the element of array ARR at the ARITY indices given in IND.
2586 ARR may be either a simple array, GNAT array descriptor, or pointer
2590 ada_value_subscript (struct value *arr, int arity, struct value **ind)
2594 struct type *elt_type;
2596 elt = ada_coerce_to_simple_array (arr);
2598 elt_type = ada_check_typedef (value_type (elt));
2599 if (TYPE_CODE (elt_type) == TYPE_CODE_ARRAY
2600 && TYPE_FIELD_BITSIZE (elt_type, 0) > 0)
2601 return value_subscript_packed (elt, arity, ind);
2603 for (k = 0; k < arity; k += 1)
2605 if (TYPE_CODE (elt_type) != TYPE_CODE_ARRAY)
2606 error (_("too many subscripts (%d expected)"), k);
2607 elt = value_subscript (elt, pos_atr (ind[k]));
2612 /* Assuming ARR is a pointer to a standard GDB array of type TYPE, the
2613 value of the element of *ARR at the ARITY indices given in
2614 IND. Does not read the entire array into memory. */
2616 static struct value *
2617 ada_value_ptr_subscript (struct value *arr, struct type *type, int arity,
2622 for (k = 0; k < arity; k += 1)
2626 if (TYPE_CODE (type) != TYPE_CODE_ARRAY)
2627 error (_("too many subscripts (%d expected)"), k);
2628 arr = value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)),
2630 get_discrete_bounds (TYPE_INDEX_TYPE (type), &lwb, &upb);
2631 arr = value_ptradd (arr, pos_atr (ind[k]) - lwb);
2632 type = TYPE_TARGET_TYPE (type);
2635 return value_ind (arr);
2638 /* Given that ARRAY_PTR is a pointer or reference to an array of type TYPE (the
2639 actual type of ARRAY_PTR is ignored), returns the Ada slice of HIGH-LOW+1
2640 elements starting at index LOW. The lower bound of this array is LOW, as
2642 static struct value *
2643 ada_value_slice_from_ptr (struct value *array_ptr, struct type *type,
2646 struct type *type0 = ada_check_typedef (type);
2647 CORE_ADDR base = value_as_address (array_ptr)
2648 + ((low - ada_discrete_type_low_bound (TYPE_INDEX_TYPE (type0)))
2649 * TYPE_LENGTH (TYPE_TARGET_TYPE (type0)));
2650 struct type *index_type =
2651 create_range_type (NULL, TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (type0)),
2653 struct type *slice_type =
2654 create_array_type (NULL, TYPE_TARGET_TYPE (type0), index_type);
2656 return value_at_lazy (slice_type, base);
2660 static struct value *
2661 ada_value_slice (struct value *array, int low, int high)
2663 struct type *type = ada_check_typedef (value_type (array));
2664 struct type *index_type =
2665 create_range_type (NULL, TYPE_INDEX_TYPE (type), low, high);
2666 struct type *slice_type =
2667 create_array_type (NULL, TYPE_TARGET_TYPE (type), index_type);
2669 return value_cast (slice_type, value_slice (array, low, high - low + 1));
2672 /* If type is a record type in the form of a standard GNAT array
2673 descriptor, returns the number of dimensions for type. If arr is a
2674 simple array, returns the number of "array of"s that prefix its
2675 type designation. Otherwise, returns 0. */
2678 ada_array_arity (struct type *type)
2685 type = desc_base_type (type);
2688 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
2689 return desc_arity (desc_bounds_type (type));
2691 while (TYPE_CODE (type) == TYPE_CODE_ARRAY)
2694 type = ada_check_typedef (TYPE_TARGET_TYPE (type));
2700 /* If TYPE is a record type in the form of a standard GNAT array
2701 descriptor or a simple array type, returns the element type for
2702 TYPE after indexing by NINDICES indices, or by all indices if
2703 NINDICES is -1. Otherwise, returns NULL. */
2706 ada_array_element_type (struct type *type, int nindices)
2708 type = desc_base_type (type);
2710 if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
2713 struct type *p_array_type;
2715 p_array_type = desc_data_target_type (type);
2717 k = ada_array_arity (type);
2721 /* Initially p_array_type = elt_type(*)[]...(k times)...[]. */
2722 if (nindices >= 0 && k > nindices)
2724 while (k > 0 && p_array_type != NULL)
2726 p_array_type = ada_check_typedef (TYPE_TARGET_TYPE (p_array_type));
2729 return p_array_type;
2731 else if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
2733 while (nindices != 0 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
2735 type = TYPE_TARGET_TYPE (type);
2744 /* The type of nth index in arrays of given type (n numbering from 1).
2745 Does not examine memory. Throws an error if N is invalid or TYPE
2746 is not an array type. NAME is the name of the Ada attribute being
2747 evaluated ('range, 'first, 'last, or 'length); it is used in building
2748 the error message. */
2750 static struct type *
2751 ada_index_type (struct type *type, int n, const char *name)
2753 struct type *result_type;
2755 type = desc_base_type (type);
2757 if (n < 0 || n > ada_array_arity (type))
2758 error (_("invalid dimension number to '%s"), name);
2760 if (ada_is_simple_array_type (type))
2764 for (i = 1; i < n; i += 1)
2765 type = TYPE_TARGET_TYPE (type);
2766 result_type = TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (type));
2767 /* FIXME: The stabs type r(0,0);bound;bound in an array type
2768 has a target type of TYPE_CODE_UNDEF. We compensate here, but
2769 perhaps stabsread.c would make more sense. */
2770 if (result_type && TYPE_CODE (result_type) == TYPE_CODE_UNDEF)
2775 result_type = desc_index_type (desc_bounds_type (type), n);
2776 if (result_type == NULL)
2777 error (_("attempt to take bound of something that is not an array"));
2783 /* Given that arr is an array type, returns the lower bound of the
2784 Nth index (numbering from 1) if WHICH is 0, and the upper bound if
2785 WHICH is 1. This returns bounds 0 .. -1 if ARR_TYPE is an
2786 array-descriptor type. It works for other arrays with bounds supplied
2787 by run-time quantities other than discriminants. */
2790 ada_array_bound_from_type (struct type * arr_type, int n, int which)
2792 struct type *type, *elt_type, *index_type_desc, *index_type;
2795 gdb_assert (which == 0 || which == 1);
2797 if (ada_is_constrained_packed_array_type (arr_type))
2798 arr_type = decode_constrained_packed_array_type (arr_type);
2800 if (arr_type == NULL || !ada_is_simple_array_type (arr_type))
2801 return (LONGEST) - which;
2803 if (TYPE_CODE (arr_type) == TYPE_CODE_PTR)
2804 type = TYPE_TARGET_TYPE (arr_type);
2809 for (i = n; i > 1; i--)
2810 elt_type = TYPE_TARGET_TYPE (type);
2812 index_type_desc = ada_find_parallel_type (type, "___XA");
2813 ada_fixup_array_indexes_type (index_type_desc);
2814 if (index_type_desc != NULL)
2815 index_type = to_fixed_range_type (TYPE_FIELD_TYPE (index_type_desc, n - 1),
2818 index_type = TYPE_INDEX_TYPE (elt_type);
2821 (LONGEST) (which == 0
2822 ? ada_discrete_type_low_bound (index_type)
2823 : ada_discrete_type_high_bound (index_type));
2826 /* Given that arr is an array value, returns the lower bound of the
2827 nth index (numbering from 1) if WHICH is 0, and the upper bound if
2828 WHICH is 1. This routine will also work for arrays with bounds
2829 supplied by run-time quantities other than discriminants. */
2832 ada_array_bound (struct value *arr, int n, int which)
2834 struct type *arr_type = value_type (arr);
2836 if (ada_is_constrained_packed_array_type (arr_type))
2837 return ada_array_bound (decode_constrained_packed_array (arr), n, which);
2838 else if (ada_is_simple_array_type (arr_type))
2839 return ada_array_bound_from_type (arr_type, n, which);
2841 return value_as_long (desc_one_bound (desc_bounds (arr), n, which));
2844 /* Given that arr is an array value, returns the length of the
2845 nth index. This routine will also work for arrays with bounds
2846 supplied by run-time quantities other than discriminants.
2847 Does not work for arrays indexed by enumeration types with representation
2848 clauses at the moment. */
2851 ada_array_length (struct value *arr, int n)
2853 struct type *arr_type = ada_check_typedef (value_type (arr));
2855 if (ada_is_constrained_packed_array_type (arr_type))
2856 return ada_array_length (decode_constrained_packed_array (arr), n);
2858 if (ada_is_simple_array_type (arr_type))
2859 return (ada_array_bound_from_type (arr_type, n, 1)
2860 - ada_array_bound_from_type (arr_type, n, 0) + 1);
2862 return (value_as_long (desc_one_bound (desc_bounds (arr), n, 1))
2863 - value_as_long (desc_one_bound (desc_bounds (arr), n, 0)) + 1);
2866 /* An empty array whose type is that of ARR_TYPE (an array type),
2867 with bounds LOW to LOW-1. */
2869 static struct value *
2870 empty_array (struct type *arr_type, int low)
2872 struct type *arr_type0 = ada_check_typedef (arr_type);
2873 struct type *index_type =
2874 create_range_type (NULL, TYPE_TARGET_TYPE (TYPE_INDEX_TYPE (arr_type0)),
2876 struct type *elt_type = ada_array_element_type (arr_type0, 1);
2878 return allocate_value (create_array_type (NULL, elt_type, index_type));
2882 /* Name resolution */
2884 /* The "decoded" name for the user-definable Ada operator corresponding
2888 ada_decoded_op_name (enum exp_opcode op)
2892 for (i = 0; ada_opname_table[i].encoded != NULL; i += 1)
2894 if (ada_opname_table[i].op == op)
2895 return ada_opname_table[i].decoded;
2897 error (_("Could not find operator name for opcode"));
2901 /* Same as evaluate_type (*EXP), but resolves ambiguous symbol
2902 references (marked by OP_VAR_VALUE nodes in which the symbol has an
2903 undefined namespace) and converts operators that are
2904 user-defined into appropriate function calls. If CONTEXT_TYPE is
2905 non-null, it provides a preferred result type [at the moment, only
2906 type void has any effect---causing procedures to be preferred over
2907 functions in calls]. A null CONTEXT_TYPE indicates that a non-void
2908 return type is preferred. May change (expand) *EXP. */
2911 resolve (struct expression **expp, int void_context_p)
2913 struct type *context_type = NULL;
2917 context_type = builtin_type ((*expp)->gdbarch)->builtin_void;
2919 resolve_subexp (expp, &pc, 1, context_type);
2922 /* Resolve the operator of the subexpression beginning at
2923 position *POS of *EXPP. "Resolving" consists of replacing
2924 the symbols that have undefined namespaces in OP_VAR_VALUE nodes
2925 with their resolutions, replacing built-in operators with
2926 function calls to user-defined operators, where appropriate, and,
2927 when DEPROCEDURE_P is non-zero, converting function-valued variables
2928 into parameterless calls. May expand *EXPP. The CONTEXT_TYPE functions
2929 are as in ada_resolve, above. */
2931 static struct value *
2932 resolve_subexp (struct expression **expp, int *pos, int deprocedure_p,
2933 struct type *context_type)
2937 struct expression *exp; /* Convenience: == *expp. */
2938 enum exp_opcode op = (*expp)->elts[pc].opcode;
2939 struct value **argvec; /* Vector of operand types (alloca'ed). */
2940 int nargs; /* Number of operands. */
2947 /* Pass one: resolve operands, saving their types and updating *pos,
2952 if (exp->elts[pc + 3].opcode == OP_VAR_VALUE
2953 && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN)
2958 resolve_subexp (expp, pos, 0, NULL);
2960 nargs = longest_to_int (exp->elts[pc + 1].longconst);
2965 resolve_subexp (expp, pos, 0, NULL);
2970 resolve_subexp (expp, pos, 1, check_typedef (exp->elts[pc + 1].type));
2973 case OP_ATR_MODULUS:
2983 case TERNOP_IN_RANGE:
2984 case BINOP_IN_BOUNDS:
2990 case OP_DISCRETE_RANGE:
2992 ada_forward_operator_length (exp, pc, &oplen, &nargs);
3001 arg1 = resolve_subexp (expp, pos, 0, NULL);
3003 resolve_subexp (expp, pos, 1, NULL);
3005 resolve_subexp (expp, pos, 1, value_type (arg1));
3022 case BINOP_LOGICAL_AND:
3023 case BINOP_LOGICAL_OR:
3024 case BINOP_BITWISE_AND:
3025 case BINOP_BITWISE_IOR:
3026 case BINOP_BITWISE_XOR:
3029 case BINOP_NOTEQUAL:
3036 case BINOP_SUBSCRIPT:
3044 case UNOP_LOGICAL_NOT:
3060 case OP_INTERNALVAR:
3070 *pos += 4 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
3073 case STRUCTOP_STRUCT:
3074 *pos += 4 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1);
3087 error (_("Unexpected operator during name resolution"));
3090 argvec = (struct value * *) alloca (sizeof (struct value *) * (nargs + 1));
3091 for (i = 0; i < nargs; i += 1)
3092 argvec[i] = resolve_subexp (expp, pos, 1, NULL);
3096 /* Pass two: perform any resolution on principal operator. */
3103 if (SYMBOL_DOMAIN (exp->elts[pc + 2].symbol) == UNDEF_DOMAIN)
3105 struct ada_symbol_info *candidates;
3109 ada_lookup_symbol_list (SYMBOL_LINKAGE_NAME
3110 (exp->elts[pc + 2].symbol),
3111 exp->elts[pc + 1].block, VAR_DOMAIN,
3114 if (n_candidates > 1)
3116 /* Types tend to get re-introduced locally, so if there
3117 are any local symbols that are not types, first filter
3120 for (j = 0; j < n_candidates; j += 1)
3121 switch (SYMBOL_CLASS (candidates[j].sym))
3126 case LOC_REGPARM_ADDR:
3134 if (j < n_candidates)
3137 while (j < n_candidates)
3139 if (SYMBOL_CLASS (candidates[j].sym) == LOC_TYPEDEF)
3141 candidates[j] = candidates[n_candidates - 1];
3150 if (n_candidates == 0)
3151 error (_("No definition found for %s"),
3152 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
3153 else if (n_candidates == 1)
3155 else if (deprocedure_p
3156 && !is_nonfunction (candidates, n_candidates))
3158 i = ada_resolve_function
3159 (candidates, n_candidates, NULL, 0,
3160 SYMBOL_LINKAGE_NAME (exp->elts[pc + 2].symbol),
3163 error (_("Could not find a match for %s"),
3164 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
3168 printf_filtered (_("Multiple matches for %s\n"),
3169 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
3170 user_select_syms (candidates, n_candidates, 1);
3174 exp->elts[pc + 1].block = candidates[i].block;
3175 exp->elts[pc + 2].symbol = candidates[i].sym;
3176 if (innermost_block == NULL
3177 || contained_in (candidates[i].block, innermost_block))
3178 innermost_block = candidates[i].block;
3182 && (TYPE_CODE (SYMBOL_TYPE (exp->elts[pc + 2].symbol))
3185 replace_operator_with_call (expp, pc, 0, 0,
3186 exp->elts[pc + 2].symbol,
3187 exp->elts[pc + 1].block);
3194 if (exp->elts[pc + 3].opcode == OP_VAR_VALUE
3195 && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN)
3197 struct ada_symbol_info *candidates;
3201 ada_lookup_symbol_list (SYMBOL_LINKAGE_NAME
3202 (exp->elts[pc + 5].symbol),
3203 exp->elts[pc + 4].block, VAR_DOMAIN,
3205 if (n_candidates == 1)
3209 i = ada_resolve_function
3210 (candidates, n_candidates,
3212 SYMBOL_LINKAGE_NAME (exp->elts[pc + 5].symbol),
3215 error (_("Could not find a match for %s"),
3216 SYMBOL_PRINT_NAME (exp->elts[pc + 5].symbol));
3219 exp->elts[pc + 4].block = candidates[i].block;
3220 exp->elts[pc + 5].symbol = candidates[i].sym;
3221 if (innermost_block == NULL
3222 || contained_in (candidates[i].block, innermost_block))
3223 innermost_block = candidates[i].block;
3234 case BINOP_BITWISE_AND:
3235 case BINOP_BITWISE_IOR:
3236 case BINOP_BITWISE_XOR:
3238 case BINOP_NOTEQUAL:
3246 case UNOP_LOGICAL_NOT:
3248 if (possible_user_operator_p (op, argvec))
3250 struct ada_symbol_info *candidates;
3254 ada_lookup_symbol_list (ada_encode (ada_decoded_op_name (op)),
3255 (struct block *) NULL, VAR_DOMAIN,
3257 i = ada_resolve_function (candidates, n_candidates, argvec, nargs,
3258 ada_decoded_op_name (op), NULL);
3262 replace_operator_with_call (expp, pc, nargs, 1,
3263 candidates[i].sym, candidates[i].block);
3274 return evaluate_subexp_type (exp, pos);
3277 /* Return non-zero if formal type FTYPE matches actual type ATYPE. If
3278 MAY_DEREF is non-zero, the formal may be a pointer and the actual
3280 /* The term "match" here is rather loose. The match is heuristic and
3284 ada_type_match (struct type *ftype, struct type *atype, int may_deref)
3286 ftype = ada_check_typedef (ftype);
3287 atype = ada_check_typedef (atype);
3289 if (TYPE_CODE (ftype) == TYPE_CODE_REF)
3290 ftype = TYPE_TARGET_TYPE (ftype);
3291 if (TYPE_CODE (atype) == TYPE_CODE_REF)
3292 atype = TYPE_TARGET_TYPE (atype);
3294 switch (TYPE_CODE (ftype))
3297 return TYPE_CODE (ftype) == TYPE_CODE (atype);
3299 if (TYPE_CODE (atype) == TYPE_CODE_PTR)
3300 return ada_type_match (TYPE_TARGET_TYPE (ftype),
3301 TYPE_TARGET_TYPE (atype), 0);
3304 && ada_type_match (TYPE_TARGET_TYPE (ftype), atype, 0));
3306 case TYPE_CODE_ENUM:
3307 case TYPE_CODE_RANGE:
3308 switch (TYPE_CODE (atype))
3311 case TYPE_CODE_ENUM:
3312 case TYPE_CODE_RANGE:
3318 case TYPE_CODE_ARRAY:
3319 return (TYPE_CODE (atype) == TYPE_CODE_ARRAY
3320 || ada_is_array_descriptor_type (atype));
3322 case TYPE_CODE_STRUCT:
3323 if (ada_is_array_descriptor_type (ftype))
3324 return (TYPE_CODE (atype) == TYPE_CODE_ARRAY
3325 || ada_is_array_descriptor_type (atype));
3327 return (TYPE_CODE (atype) == TYPE_CODE_STRUCT
3328 && !ada_is_array_descriptor_type (atype));
3330 case TYPE_CODE_UNION:
3332 return (TYPE_CODE (atype) == TYPE_CODE (ftype));
3336 /* Return non-zero if the formals of FUNC "sufficiently match" the
3337 vector of actual argument types ACTUALS of size N_ACTUALS. FUNC
3338 may also be an enumeral, in which case it is treated as a 0-
3339 argument function. */
3342 ada_args_match (struct symbol *func, struct value **actuals, int n_actuals)
3345 struct type *func_type = SYMBOL_TYPE (func);
3347 if (SYMBOL_CLASS (func) == LOC_CONST
3348 && TYPE_CODE (func_type) == TYPE_CODE_ENUM)
3349 return (n_actuals == 0);
3350 else if (func_type == NULL || TYPE_CODE (func_type) != TYPE_CODE_FUNC)
3353 if (TYPE_NFIELDS (func_type) != n_actuals)
3356 for (i = 0; i < n_actuals; i += 1)
3358 if (actuals[i] == NULL)
3362 struct type *ftype = ada_check_typedef (TYPE_FIELD_TYPE (func_type,
3364 struct type *atype = ada_check_typedef (value_type (actuals[i]));
3366 if (!ada_type_match (ftype, atype, 1))
3373 /* False iff function type FUNC_TYPE definitely does not produce a value
3374 compatible with type CONTEXT_TYPE. Conservatively returns 1 if
3375 FUNC_TYPE is not a valid function type with a non-null return type
3376 or an enumerated type. A null CONTEXT_TYPE indicates any non-void type. */
3379 return_match (struct type *func_type, struct type *context_type)
3381 struct type *return_type;
3383 if (func_type == NULL)
3386 if (TYPE_CODE (func_type) == TYPE_CODE_FUNC)
3387 return_type = get_base_type (TYPE_TARGET_TYPE (func_type));
3389 return_type = get_base_type (func_type);
3390 if (return_type == NULL)
3393 context_type = get_base_type (context_type);
3395 if (TYPE_CODE (return_type) == TYPE_CODE_ENUM)
3396 return context_type == NULL || return_type == context_type;
3397 else if (context_type == NULL)
3398 return TYPE_CODE (return_type) != TYPE_CODE_VOID;
3400 return TYPE_CODE (return_type) == TYPE_CODE (context_type);
3404 /* Returns the index in SYMS[0..NSYMS-1] that contains the symbol for the
3405 function (if any) that matches the types of the NARGS arguments in
3406 ARGS. If CONTEXT_TYPE is non-null and there is at least one match
3407 that returns that type, then eliminate matches that don't. If
3408 CONTEXT_TYPE is void and there is at least one match that does not
3409 return void, eliminate all matches that do.
3411 Asks the user if there is more than one match remaining. Returns -1
3412 if there is no such symbol or none is selected. NAME is used
3413 solely for messages. May re-arrange and modify SYMS in
3414 the process; the index returned is for the modified vector. */
3417 ada_resolve_function (struct ada_symbol_info syms[],
3418 int nsyms, struct value **args, int nargs,
3419 const char *name, struct type *context_type)
3423 int m; /* Number of hits */
3426 /* In the first pass of the loop, we only accept functions matching
3427 context_type. If none are found, we add a second pass of the loop
3428 where every function is accepted. */
3429 for (fallback = 0; m == 0 && fallback < 2; fallback++)
3431 for (k = 0; k < nsyms; k += 1)
3433 struct type *type = ada_check_typedef (SYMBOL_TYPE (syms[k].sym));
3435 if (ada_args_match (syms[k].sym, args, nargs)
3436 && (fallback || return_match (type, context_type)))
3448 printf_filtered (_("Multiple matches for %s\n"), name);
3449 user_select_syms (syms, m, 1);
3455 /* Returns true (non-zero) iff decoded name N0 should appear before N1
3456 in a listing of choices during disambiguation (see sort_choices, below).
3457 The idea is that overloadings of a subprogram name from the
3458 same package should sort in their source order. We settle for ordering
3459 such symbols by their trailing number (__N or $N). */
3462 encoded_ordered_before (const char *N0, const char *N1)
3466 else if (N0 == NULL)
3472 for (k0 = strlen (N0) - 1; k0 > 0 && isdigit (N0[k0]); k0 -= 1)
3474 for (k1 = strlen (N1) - 1; k1 > 0 && isdigit (N1[k1]); k1 -= 1)
3476 if ((N0[k0] == '_' || N0[k0] == '$') && N0[k0 + 1] != '\000'
3477 && (N1[k1] == '_' || N1[k1] == '$') && N1[k1 + 1] != '\000')
3482 while (N0[n0] == '_' && n0 > 0 && N0[n0 - 1] == '_')
3485 while (N1[n1] == '_' && n1 > 0 && N1[n1 - 1] == '_')
3487 if (n0 == n1 && strncmp (N0, N1, n0) == 0)
3488 return (atoi (N0 + k0 + 1) < atoi (N1 + k1 + 1));
3490 return (strcmp (N0, N1) < 0);
3494 /* Sort SYMS[0..NSYMS-1] to put the choices in a canonical order by the
3498 sort_choices (struct ada_symbol_info syms[], int nsyms)
3502 for (i = 1; i < nsyms; i += 1)
3504 struct ada_symbol_info sym = syms[i];
3507 for (j = i - 1; j >= 0; j -= 1)
3509 if (encoded_ordered_before (SYMBOL_LINKAGE_NAME (syms[j].sym),
3510 SYMBOL_LINKAGE_NAME (sym.sym)))
3512 syms[j + 1] = syms[j];
3518 /* Given a list of NSYMS symbols in SYMS, select up to MAX_RESULTS>0
3519 by asking the user (if necessary), returning the number selected,
3520 and setting the first elements of SYMS items. Error if no symbols
3523 /* NOTE: Adapted from decode_line_2 in symtab.c, with which it ought
3524 to be re-integrated one of these days. */
3527 user_select_syms (struct ada_symbol_info *syms, int nsyms, int max_results)
3530 int *chosen = (int *) alloca (sizeof (int) * nsyms);
3532 int first_choice = (max_results == 1) ? 1 : 2;
3533 const char *select_mode = multiple_symbols_select_mode ();
3535 if (max_results < 1)
3536 error (_("Request to select 0 symbols!"));
3540 if (select_mode == multiple_symbols_cancel)
3542 canceled because the command is ambiguous\n\
3543 See set/show multiple-symbol."));
3545 /* If select_mode is "all", then return all possible symbols.
3546 Only do that if more than one symbol can be selected, of course.
3547 Otherwise, display the menu as usual. */
3548 if (select_mode == multiple_symbols_all && max_results > 1)
3551 printf_unfiltered (_("[0] cancel\n"));
3552 if (max_results > 1)
3553 printf_unfiltered (_("[1] all\n"));
3555 sort_choices (syms, nsyms);
3557 for (i = 0; i < nsyms; i += 1)
3559 if (syms[i].sym == NULL)
3562 if (SYMBOL_CLASS (syms[i].sym) == LOC_BLOCK)
3564 struct symtab_and_line sal =
3565 find_function_start_sal (syms[i].sym, 1);
3567 if (sal.symtab == NULL)
3568 printf_unfiltered (_("[%d] %s at <no source file available>:%d\n"),
3570 SYMBOL_PRINT_NAME (syms[i].sym),
3573 printf_unfiltered (_("[%d] %s at %s:%d\n"), i + first_choice,
3574 SYMBOL_PRINT_NAME (syms[i].sym),
3575 symtab_to_filename_for_display (sal.symtab),
3582 (SYMBOL_CLASS (syms[i].sym) == LOC_CONST
3583 && SYMBOL_TYPE (syms[i].sym) != NULL
3584 && TYPE_CODE (SYMBOL_TYPE (syms[i].sym)) == TYPE_CODE_ENUM);
3585 struct symtab *symtab = SYMBOL_SYMTAB (syms[i].sym);
3587 if (SYMBOL_LINE (syms[i].sym) != 0 && symtab != NULL)
3588 printf_unfiltered (_("[%d] %s at %s:%d\n"),
3590 SYMBOL_PRINT_NAME (syms[i].sym),
3591 symtab_to_filename_for_display (symtab),
3592 SYMBOL_LINE (syms[i].sym));
3593 else if (is_enumeral
3594 && TYPE_NAME (SYMBOL_TYPE (syms[i].sym)) != NULL)
3596 printf_unfiltered (("[%d] "), i + first_choice);
3597 ada_print_type (SYMBOL_TYPE (syms[i].sym), NULL,
3598 gdb_stdout, -1, 0, &type_print_raw_options);
3599 printf_unfiltered (_("'(%s) (enumeral)\n"),
3600 SYMBOL_PRINT_NAME (syms[i].sym));
3602 else if (symtab != NULL)
3603 printf_unfiltered (is_enumeral
3604 ? _("[%d] %s in %s (enumeral)\n")
3605 : _("[%d] %s at %s:?\n"),
3607 SYMBOL_PRINT_NAME (syms[i].sym),
3608 symtab_to_filename_for_display (symtab));
3610 printf_unfiltered (is_enumeral
3611 ? _("[%d] %s (enumeral)\n")
3612 : _("[%d] %s at ?\n"),
3614 SYMBOL_PRINT_NAME (syms[i].sym));
3618 n_chosen = get_selections (chosen, nsyms, max_results, max_results > 1,
3621 for (i = 0; i < n_chosen; i += 1)
3622 syms[i] = syms[chosen[i]];
3627 /* Read and validate a set of numeric choices from the user in the
3628 range 0 .. N_CHOICES-1. Place the results in increasing
3629 order in CHOICES[0 .. N-1], and return N.
3631 The user types choices as a sequence of numbers on one line
3632 separated by blanks, encoding them as follows:
3634 + A choice of 0 means to cancel the selection, throwing an error.
3635 + If IS_ALL_CHOICE, a choice of 1 selects the entire set 0 .. N_CHOICES-1.
3636 + The user chooses k by typing k+IS_ALL_CHOICE+1.
3638 The user is not allowed to choose more than MAX_RESULTS values.
3640 ANNOTATION_SUFFIX, if present, is used to annotate the input
3641 prompts (for use with the -f switch). */
3644 get_selections (int *choices, int n_choices, int max_results,
3645 int is_all_choice, char *annotation_suffix)
3650 int first_choice = is_all_choice ? 2 : 1;
3652 prompt = getenv ("PS2");
3656 args = command_line_input (prompt, 0, annotation_suffix);
3659 error_no_arg (_("one or more choice numbers"));
3663 /* Set choices[0 .. n_chosen-1] to the users' choices in ascending
3664 order, as given in args. Choices are validated. */
3670 args = skip_spaces (args);
3671 if (*args == '\0' && n_chosen == 0)
3672 error_no_arg (_("one or more choice numbers"));
3673 else if (*args == '\0')
3676 choice = strtol (args, &args2, 10);
3677 if (args == args2 || choice < 0
3678 || choice > n_choices + first_choice - 1)
3679 error (_("Argument must be choice number"));
3683 error (_("cancelled"));
3685 if (choice < first_choice)
3687 n_chosen = n_choices;
3688 for (j = 0; j < n_choices; j += 1)
3692 choice -= first_choice;
3694 for (j = n_chosen - 1; j >= 0 && choice < choices[j]; j -= 1)
3698 if (j < 0 || choice != choices[j])
3702 for (k = n_chosen - 1; k > j; k -= 1)
3703 choices[k + 1] = choices[k];
3704 choices[j + 1] = choice;
3709 if (n_chosen > max_results)
3710 error (_("Select no more than %d of the above"), max_results);
3715 /* Replace the operator of length OPLEN at position PC in *EXPP with a call
3716 on the function identified by SYM and BLOCK, and taking NARGS
3717 arguments. Update *EXPP as needed to hold more space. */
3720 replace_operator_with_call (struct expression **expp, int pc, int nargs,
3721 int oplen, struct symbol *sym,
3722 const struct block *block)
3724 /* A new expression, with 6 more elements (3 for funcall, 4 for function
3725 symbol, -oplen for operator being replaced). */
3726 struct expression *newexp = (struct expression *)
3727 xzalloc (sizeof (struct expression)
3728 + EXP_ELEM_TO_BYTES ((*expp)->nelts + 7 - oplen));
3729 struct expression *exp = *expp;
3731 newexp->nelts = exp->nelts + 7 - oplen;
3732 newexp->language_defn = exp->language_defn;
3733 newexp->gdbarch = exp->gdbarch;
3734 memcpy (newexp->elts, exp->elts, EXP_ELEM_TO_BYTES (pc));
3735 memcpy (newexp->elts + pc + 7, exp->elts + pc + oplen,
3736 EXP_ELEM_TO_BYTES (exp->nelts - pc - oplen));
3738 newexp->elts[pc].opcode = newexp->elts[pc + 2].opcode = OP_FUNCALL;
3739 newexp->elts[pc + 1].longconst = (LONGEST) nargs;
3741 newexp->elts[pc + 3].opcode = newexp->elts[pc + 6].opcode = OP_VAR_VALUE;
3742 newexp->elts[pc + 4].block = block;
3743 newexp->elts[pc + 5].symbol = sym;
3749 /* Type-class predicates */
3751 /* True iff TYPE is numeric (i.e., an INT, RANGE (of numeric type),
3755 numeric_type_p (struct type *type)
3761 switch (TYPE_CODE (type))
3766 case TYPE_CODE_RANGE:
3767 return (type == TYPE_TARGET_TYPE (type)
3768 || numeric_type_p (TYPE_TARGET_TYPE (type)));
3775 /* True iff TYPE is integral (an INT or RANGE of INTs). */
3778 integer_type_p (struct type *type)
3784 switch (TYPE_CODE (type))
3788 case TYPE_CODE_RANGE:
3789 return (type == TYPE_TARGET_TYPE (type)
3790 || integer_type_p (TYPE_TARGET_TYPE (type)));
3797 /* True iff TYPE is scalar (INT, RANGE, FLOAT, ENUM). */
3800 scalar_type_p (struct type *type)
3806 switch (TYPE_CODE (type))
3809 case TYPE_CODE_RANGE:
3810 case TYPE_CODE_ENUM:
3819 /* True iff TYPE is discrete (INT, RANGE, ENUM). */
3822 discrete_type_p (struct type *type)
3828 switch (TYPE_CODE (type))
3831 case TYPE_CODE_RANGE:
3832 case TYPE_CODE_ENUM:
3833 case TYPE_CODE_BOOL:
3841 /* Returns non-zero if OP with operands in the vector ARGS could be
3842 a user-defined function. Errs on the side of pre-defined operators
3843 (i.e., result 0). */
3846 possible_user_operator_p (enum exp_opcode op, struct value *args[])
3848 struct type *type0 =
3849 (args[0] == NULL) ? NULL : ada_check_typedef (value_type (args[0]));
3850 struct type *type1 =
3851 (args[1] == NULL) ? NULL : ada_check_typedef (value_type (args[1]));
3865 return (!(numeric_type_p (type0) && numeric_type_p (type1)));
3869 case BINOP_BITWISE_AND:
3870 case BINOP_BITWISE_IOR:
3871 case BINOP_BITWISE_XOR:
3872 return (!(integer_type_p (type0) && integer_type_p (type1)));
3875 case BINOP_NOTEQUAL:
3880 return (!(scalar_type_p (type0) && scalar_type_p (type1)));
3883 return !ada_is_array_type (type0) || !ada_is_array_type (type1);
3886 return (!(numeric_type_p (type0) && integer_type_p (type1)));
3890 case UNOP_LOGICAL_NOT:
3892 return (!numeric_type_p (type0));
3901 1. In the following, we assume that a renaming type's name may
3902 have an ___XD suffix. It would be nice if this went away at some
3904 2. We handle both the (old) purely type-based representation of
3905 renamings and the (new) variable-based encoding. At some point,
3906 it is devoutly to be hoped that the former goes away
3907 (FIXME: hilfinger-2007-07-09).
3908 3. Subprogram renamings are not implemented, although the XRS
3909 suffix is recognized (FIXME: hilfinger-2007-07-09). */
3911 /* If SYM encodes a renaming,
3913 <renaming> renames <renamed entity>,
3915 sets *LEN to the length of the renamed entity's name,
3916 *RENAMED_ENTITY to that name (not null-terminated), and *RENAMING_EXPR to
3917 the string describing the subcomponent selected from the renamed
3918 entity. Returns ADA_NOT_RENAMING if SYM does not encode a renaming
3919 (in which case, the values of *RENAMED_ENTITY, *LEN, and *RENAMING_EXPR
3920 are undefined). Otherwise, returns a value indicating the category
3921 of entity renamed: an object (ADA_OBJECT_RENAMING), exception
3922 (ADA_EXCEPTION_RENAMING), package (ADA_PACKAGE_RENAMING), or
3923 subprogram (ADA_SUBPROGRAM_RENAMING). Does no allocation; the
3924 strings returned in *RENAMED_ENTITY and *RENAMING_EXPR should not be
3925 deallocated. The values of RENAMED_ENTITY, LEN, or RENAMING_EXPR
3926 may be NULL, in which case they are not assigned.
3928 [Currently, however, GCC does not generate subprogram renamings.] */
3930 enum ada_renaming_category
3931 ada_parse_renaming (struct symbol *sym,
3932 const char **renamed_entity, int *len,
3933 const char **renaming_expr)
3935 enum ada_renaming_category kind;
3940 return ADA_NOT_RENAMING;
3941 switch (SYMBOL_CLASS (sym))
3944 return ADA_NOT_RENAMING;
3946 return parse_old_style_renaming (SYMBOL_TYPE (sym),
3947 renamed_entity, len, renaming_expr);
3951 case LOC_OPTIMIZED_OUT:
3952 info = strstr (SYMBOL_LINKAGE_NAME (sym), "___XR");
3954 return ADA_NOT_RENAMING;
3958 kind = ADA_OBJECT_RENAMING;
3962 kind = ADA_EXCEPTION_RENAMING;
3966 kind = ADA_PACKAGE_RENAMING;
3970 kind = ADA_SUBPROGRAM_RENAMING;
3974 return ADA_NOT_RENAMING;
3978 if (renamed_entity != NULL)
3979 *renamed_entity = info;
3980 suffix = strstr (info, "___XE");
3981 if (suffix == NULL || suffix == info)
3982 return ADA_NOT_RENAMING;
3984 *len = strlen (info) - strlen (suffix);
3986 if (renaming_expr != NULL)
3987 *renaming_expr = suffix;
3991 /* Assuming TYPE encodes a renaming according to the old encoding in
3992 exp_dbug.ads, returns details of that renaming in *RENAMED_ENTITY,
3993 *LEN, and *RENAMING_EXPR, as for ada_parse_renaming, above. Returns
3994 ADA_NOT_RENAMING otherwise. */
3995 static enum ada_renaming_category
3996 parse_old_style_renaming (struct type *type,
3997 const char **renamed_entity, int *len,
3998 const char **renaming_expr)
4000 enum ada_renaming_category kind;
4005 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_ENUM
4006 || TYPE_NFIELDS (type) != 1)
4007 return ADA_NOT_RENAMING;
4009 name = type_name_no_tag (type);
4011 return ADA_NOT_RENAMING;
4013 name = strstr (name, "___XR");
4015 return ADA_NOT_RENAMING;
4020 kind = ADA_OBJECT_RENAMING;
4023 kind = ADA_EXCEPTION_RENAMING;
4026 kind = ADA_PACKAGE_RENAMING;
4029 kind = ADA_SUBPROGRAM_RENAMING;
4032 return ADA_NOT_RENAMING;
4035 info = TYPE_FIELD_NAME (type, 0);
4037 return ADA_NOT_RENAMING;
4038 if (renamed_entity != NULL)
4039 *renamed_entity = info;
4040 suffix = strstr (info, "___XE");
4041 if (renaming_expr != NULL)
4042 *renaming_expr = suffix + 5;
4043 if (suffix == NULL || suffix == info)
4044 return ADA_NOT_RENAMING;
4046 *len = suffix - info;
4050 /* Compute the value of the given RENAMING_SYM, which is expected to
4051 be a symbol encoding a renaming expression. BLOCK is the block
4052 used to evaluate the renaming. */
4054 static struct value *
4055 ada_read_renaming_var_value (struct symbol *renaming_sym,
4056 struct block *block)
4058 const char *sym_name;
4059 struct expression *expr;
4060 struct value *value;
4061 struct cleanup *old_chain = NULL;
4063 sym_name = SYMBOL_LINKAGE_NAME (renaming_sym);
4064 expr = parse_exp_1 (&sym_name, 0, block, 0);
4065 old_chain = make_cleanup (free_current_contents, &expr);
4066 value = evaluate_expression (expr);
4068 do_cleanups (old_chain);
4073 /* Evaluation: Function Calls */
4075 /* Return an lvalue containing the value VAL. This is the identity on
4076 lvalues, and otherwise has the side-effect of allocating memory
4077 in the inferior where a copy of the value contents is copied. */
4079 static struct value *
4080 ensure_lval (struct value *val)
4082 if (VALUE_LVAL (val) == not_lval
4083 || VALUE_LVAL (val) == lval_internalvar)
4085 int len = TYPE_LENGTH (ada_check_typedef (value_type (val)));
4086 const CORE_ADDR addr =
4087 value_as_long (value_allocate_space_in_inferior (len));
4089 set_value_address (val, addr);
4090 VALUE_LVAL (val) = lval_memory;
4091 write_memory (addr, value_contents (val), len);
4097 /* Return the value ACTUAL, converted to be an appropriate value for a
4098 formal of type FORMAL_TYPE. Use *SP as a stack pointer for
4099 allocating any necessary descriptors (fat pointers), or copies of
4100 values not residing in memory, updating it as needed. */
4103 ada_convert_actual (struct value *actual, struct type *formal_type0)
4105 struct type *actual_type = ada_check_typedef (value_type (actual));
4106 struct type *formal_type = ada_check_typedef (formal_type0);
4107 struct type *formal_target =
4108 TYPE_CODE (formal_type) == TYPE_CODE_PTR
4109 ? ada_check_typedef (TYPE_TARGET_TYPE (formal_type)) : formal_type;
4110 struct type *actual_target =
4111 TYPE_CODE (actual_type) == TYPE_CODE_PTR
4112 ? ada_check_typedef (TYPE_TARGET_TYPE (actual_type)) : actual_type;
4114 if (ada_is_array_descriptor_type (formal_target)
4115 && TYPE_CODE (actual_target) == TYPE_CODE_ARRAY)
4116 return make_array_descriptor (formal_type, actual);
4117 else if (TYPE_CODE (formal_type) == TYPE_CODE_PTR
4118 || TYPE_CODE (formal_type) == TYPE_CODE_REF)
4120 struct value *result;
4122 if (TYPE_CODE (formal_target) == TYPE_CODE_ARRAY
4123 && ada_is_array_descriptor_type (actual_target))
4124 result = desc_data (actual);
4125 else if (TYPE_CODE (actual_type) != TYPE_CODE_PTR)
4127 if (VALUE_LVAL (actual) != lval_memory)
4131 actual_type = ada_check_typedef (value_type (actual));
4132 val = allocate_value (actual_type);
4133 memcpy ((char *) value_contents_raw (val),
4134 (char *) value_contents (actual),
4135 TYPE_LENGTH (actual_type));
4136 actual = ensure_lval (val);
4138 result = value_addr (actual);
4142 return value_cast_pointers (formal_type, result, 0);
4144 else if (TYPE_CODE (actual_type) == TYPE_CODE_PTR)
4145 return ada_value_ind (actual);
4150 /* Convert VALUE (which must be an address) to a CORE_ADDR that is a pointer of
4151 type TYPE. This is usually an inefficient no-op except on some targets
4152 (such as AVR) where the representation of a pointer and an address
4156 value_pointer (struct value *value, struct type *type)
4158 struct gdbarch *gdbarch = get_type_arch (type);
4159 unsigned len = TYPE_LENGTH (type);
4160 gdb_byte *buf = alloca (len);
4163 addr = value_address (value);
4164 gdbarch_address_to_pointer (gdbarch, type, buf, addr);
4165 addr = extract_unsigned_integer (buf, len, gdbarch_byte_order (gdbarch));
4170 /* Push a descriptor of type TYPE for array value ARR on the stack at
4171 *SP, updating *SP to reflect the new descriptor. Return either
4172 an lvalue representing the new descriptor, or (if TYPE is a pointer-
4173 to-descriptor type rather than a descriptor type), a struct value *
4174 representing a pointer to this descriptor. */
4176 static struct value *
4177 make_array_descriptor (struct type *type, struct value *arr)
4179 struct type *bounds_type = desc_bounds_type (type);
4180 struct type *desc_type = desc_base_type (type);
4181 struct value *descriptor = allocate_value (desc_type);
4182 struct value *bounds = allocate_value (bounds_type);
4185 for (i = ada_array_arity (ada_check_typedef (value_type (arr)));
4188 modify_field (value_type (bounds), value_contents_writeable (bounds),
4189 ada_array_bound (arr, i, 0),
4190 desc_bound_bitpos (bounds_type, i, 0),
4191 desc_bound_bitsize (bounds_type, i, 0));
4192 modify_field (value_type (bounds), value_contents_writeable (bounds),
4193 ada_array_bound (arr, i, 1),
4194 desc_bound_bitpos (bounds_type, i, 1),
4195 desc_bound_bitsize (bounds_type, i, 1));
4198 bounds = ensure_lval (bounds);
4200 modify_field (value_type (descriptor),
4201 value_contents_writeable (descriptor),
4202 value_pointer (ensure_lval (arr),
4203 TYPE_FIELD_TYPE (desc_type, 0)),
4204 fat_pntr_data_bitpos (desc_type),
4205 fat_pntr_data_bitsize (desc_type));
4207 modify_field (value_type (descriptor),
4208 value_contents_writeable (descriptor),
4209 value_pointer (bounds,
4210 TYPE_FIELD_TYPE (desc_type, 1)),
4211 fat_pntr_bounds_bitpos (desc_type),
4212 fat_pntr_bounds_bitsize (desc_type));
4214 descriptor = ensure_lval (descriptor);
4216 if (TYPE_CODE (type) == TYPE_CODE_PTR)
4217 return value_addr (descriptor);
4222 /* Dummy definitions for an experimental caching module that is not
4223 * used in the public sources. */
4226 lookup_cached_symbol (const char *name, domain_enum namespace,
4227 struct symbol **sym, struct block **block)
4233 cache_symbol (const char *name, domain_enum namespace, struct symbol *sym,
4234 const struct block *block)
4240 /* Return nonzero if wild matching should be used when searching for
4241 all symbols matching LOOKUP_NAME.
4243 LOOKUP_NAME is expected to be a symbol name after transformation
4244 for Ada lookups (see ada_name_for_lookup). */
4247 should_use_wild_match (const char *lookup_name)
4249 return (strstr (lookup_name, "__") == NULL);
4252 /* Return the result of a standard (literal, C-like) lookup of NAME in
4253 given DOMAIN, visible from lexical block BLOCK. */
4255 static struct symbol *
4256 standard_lookup (const char *name, const struct block *block,
4259 /* Initialize it just to avoid a GCC false warning. */
4260 struct symbol *sym = NULL;
4262 if (lookup_cached_symbol (name, domain, &sym, NULL))
4264 sym = lookup_symbol_in_language (name, block, domain, language_c, 0);
4265 cache_symbol (name, domain, sym, block_found);
4270 /* Non-zero iff there is at least one non-function/non-enumeral symbol
4271 in the symbol fields of SYMS[0..N-1]. We treat enumerals as functions,
4272 since they contend in overloading in the same way. */
4274 is_nonfunction (struct ada_symbol_info syms[], int n)
4278 for (i = 0; i < n; i += 1)
4279 if (TYPE_CODE (SYMBOL_TYPE (syms[i].sym)) != TYPE_CODE_FUNC
4280 && (TYPE_CODE (SYMBOL_TYPE (syms[i].sym)) != TYPE_CODE_ENUM
4281 || SYMBOL_CLASS (syms[i].sym) != LOC_CONST))
4287 /* If true (non-zero), then TYPE0 and TYPE1 represent equivalent
4288 struct types. Otherwise, they may not. */
4291 equiv_types (struct type *type0, struct type *type1)
4295 if (type0 == NULL || type1 == NULL
4296 || TYPE_CODE (type0) != TYPE_CODE (type1))
4298 if ((TYPE_CODE (type0) == TYPE_CODE_STRUCT
4299 || TYPE_CODE (type0) == TYPE_CODE_ENUM)
4300 && ada_type_name (type0) != NULL && ada_type_name (type1) != NULL
4301 && strcmp (ada_type_name (type0), ada_type_name (type1)) == 0)
4307 /* True iff SYM0 represents the same entity as SYM1, or one that is
4308 no more defined than that of SYM1. */
4311 lesseq_defined_than (struct symbol *sym0, struct symbol *sym1)
4315 if (SYMBOL_DOMAIN (sym0) != SYMBOL_DOMAIN (sym1)
4316 || SYMBOL_CLASS (sym0) != SYMBOL_CLASS (sym1))
4319 switch (SYMBOL_CLASS (sym0))
4325 struct type *type0 = SYMBOL_TYPE (sym0);
4326 struct type *type1 = SYMBOL_TYPE (sym1);
4327 const char *name0 = SYMBOL_LINKAGE_NAME (sym0);
4328 const char *name1 = SYMBOL_LINKAGE_NAME (sym1);
4329 int len0 = strlen (name0);
4332 TYPE_CODE (type0) == TYPE_CODE (type1)
4333 && (equiv_types (type0, type1)
4334 || (len0 < strlen (name1) && strncmp (name0, name1, len0) == 0
4335 && strncmp (name1 + len0, "___XV", 5) == 0));
4338 return SYMBOL_VALUE (sym0) == SYMBOL_VALUE (sym1)
4339 && equiv_types (SYMBOL_TYPE (sym0), SYMBOL_TYPE (sym1));
4345 /* Append (SYM,BLOCK,SYMTAB) to the end of the array of struct ada_symbol_info
4346 records in OBSTACKP. Do nothing if SYM is a duplicate. */
4349 add_defn_to_vec (struct obstack *obstackp,
4351 struct block *block)
4354 struct ada_symbol_info *prevDefns = defns_collected (obstackp, 0);
4356 /* Do not try to complete stub types, as the debugger is probably
4357 already scanning all symbols matching a certain name at the
4358 time when this function is called. Trying to replace the stub
4359 type by its associated full type will cause us to restart a scan
4360 which may lead to an infinite recursion. Instead, the client
4361 collecting the matching symbols will end up collecting several
4362 matches, with at least one of them complete. It can then filter
4363 out the stub ones if needed. */
4365 for (i = num_defns_collected (obstackp) - 1; i >= 0; i -= 1)
4367 if (lesseq_defined_than (sym, prevDefns[i].sym))
4369 else if (lesseq_defined_than (prevDefns[i].sym, sym))
4371 prevDefns[i].sym = sym;
4372 prevDefns[i].block = block;
4378 struct ada_symbol_info info;
4382 obstack_grow (obstackp, &info, sizeof (struct ada_symbol_info));
4386 /* Number of ada_symbol_info structures currently collected in
4387 current vector in *OBSTACKP. */
4390 num_defns_collected (struct obstack *obstackp)
4392 return obstack_object_size (obstackp) / sizeof (struct ada_symbol_info);
4395 /* Vector of ada_symbol_info structures currently collected in current
4396 vector in *OBSTACKP. If FINISH, close off the vector and return
4397 its final address. */
4399 static struct ada_symbol_info *
4400 defns_collected (struct obstack *obstackp, int finish)
4403 return obstack_finish (obstackp);
4405 return (struct ada_symbol_info *) obstack_base (obstackp);
4408 /* Return a bound minimal symbol matching NAME according to Ada
4409 decoding rules. Returns an invalid symbol if there is no such
4410 minimal symbol. Names prefixed with "standard__" are handled
4411 specially: "standard__" is first stripped off, and only static and
4412 global symbols are searched. */
4414 struct bound_minimal_symbol
4415 ada_lookup_simple_minsym (const char *name)
4417 struct bound_minimal_symbol result;
4418 struct objfile *objfile;
4419 struct minimal_symbol *msymbol;
4420 const int wild_match_p = should_use_wild_match (name);
4422 memset (&result, 0, sizeof (result));
4424 /* Special case: If the user specifies a symbol name inside package
4425 Standard, do a non-wild matching of the symbol name without
4426 the "standard__" prefix. This was primarily introduced in order
4427 to allow the user to specifically access the standard exceptions
4428 using, for instance, Standard.Constraint_Error when Constraint_Error
4429 is ambiguous (due to the user defining its own Constraint_Error
4430 entity inside its program). */
4431 if (strncmp (name, "standard__", sizeof ("standard__") - 1) == 0)
4432 name += sizeof ("standard__") - 1;
4434 ALL_MSYMBOLS (objfile, msymbol)
4436 if (match_name (SYMBOL_LINKAGE_NAME (msymbol), name, wild_match_p)
4437 && MSYMBOL_TYPE (msymbol) != mst_solib_trampoline)
4439 result.minsym = msymbol;
4440 result.objfile = objfile;
4448 /* For all subprograms that statically enclose the subprogram of the
4449 selected frame, add symbols matching identifier NAME in DOMAIN
4450 and their blocks to the list of data in OBSTACKP, as for
4451 ada_add_block_symbols (q.v.). If WILD_MATCH_P, treat as NAME
4452 with a wildcard prefix. */
4455 add_symbols_from_enclosing_procs (struct obstack *obstackp,
4456 const char *name, domain_enum namespace,
4461 /* True if TYPE is definitely an artificial type supplied to a symbol
4462 for which no debugging information was given in the symbol file. */
4465 is_nondebugging_type (struct type *type)
4467 const char *name = ada_type_name (type);
4469 return (name != NULL && strcmp (name, "<variable, no debug info>") == 0);
4472 /* Return nonzero if TYPE1 and TYPE2 are two enumeration types
4473 that are deemed "identical" for practical purposes.
4475 This function assumes that TYPE1 and TYPE2 are both TYPE_CODE_ENUM
4476 types and that their number of enumerals is identical (in other
4477 words, TYPE_NFIELDS (type1) == TYPE_NFIELDS (type2)). */
4480 ada_identical_enum_types_p (struct type *type1, struct type *type2)
4484 /* The heuristic we use here is fairly conservative. We consider
4485 that 2 enumerate types are identical if they have the same
4486 number of enumerals and that all enumerals have the same
4487 underlying value and name. */
4489 /* All enums in the type should have an identical underlying value. */
4490 for (i = 0; i < TYPE_NFIELDS (type1); i++)
4491 if (TYPE_FIELD_ENUMVAL (type1, i) != TYPE_FIELD_ENUMVAL (type2, i))
4494 /* All enumerals should also have the same name (modulo any numerical
4496 for (i = 0; i < TYPE_NFIELDS (type1); i++)
4498 const char *name_1 = TYPE_FIELD_NAME (type1, i);
4499 const char *name_2 = TYPE_FIELD_NAME (type2, i);
4500 int len_1 = strlen (name_1);
4501 int len_2 = strlen (name_2);
4503 ada_remove_trailing_digits (TYPE_FIELD_NAME (type1, i), &len_1);
4504 ada_remove_trailing_digits (TYPE_FIELD_NAME (type2, i), &len_2);
4506 || strncmp (TYPE_FIELD_NAME (type1, i),
4507 TYPE_FIELD_NAME (type2, i),
4515 /* Return nonzero if all the symbols in SYMS are all enumeral symbols
4516 that are deemed "identical" for practical purposes. Sometimes,
4517 enumerals are not strictly identical, but their types are so similar
4518 that they can be considered identical.
4520 For instance, consider the following code:
4522 type Color is (Black, Red, Green, Blue, White);
4523 type RGB_Color is new Color range Red .. Blue;
4525 Type RGB_Color is a subrange of an implicit type which is a copy
4526 of type Color. If we call that implicit type RGB_ColorB ("B" is
4527 for "Base Type"), then type RGB_ColorB is a copy of type Color.
4528 As a result, when an expression references any of the enumeral
4529 by name (Eg. "print green"), the expression is technically
4530 ambiguous and the user should be asked to disambiguate. But
4531 doing so would only hinder the user, since it wouldn't matter
4532 what choice he makes, the outcome would always be the same.
4533 So, for practical purposes, we consider them as the same. */
4536 symbols_are_identical_enums (struct ada_symbol_info *syms, int nsyms)
4540 /* Before performing a thorough comparison check of each type,
4541 we perform a series of inexpensive checks. We expect that these
4542 checks will quickly fail in the vast majority of cases, and thus
4543 help prevent the unnecessary use of a more expensive comparison.
4544 Said comparison also expects us to make some of these checks
4545 (see ada_identical_enum_types_p). */
4547 /* Quick check: All symbols should have an enum type. */
4548 for (i = 0; i < nsyms; i++)
4549 if (TYPE_CODE (SYMBOL_TYPE (syms[i].sym)) != TYPE_CODE_ENUM)
4552 /* Quick check: They should all have the same value. */
4553 for (i = 1; i < nsyms; i++)
4554 if (SYMBOL_VALUE (syms[i].sym) != SYMBOL_VALUE (syms[0].sym))
4557 /* Quick check: They should all have the same number of enumerals. */
4558 for (i = 1; i < nsyms; i++)
4559 if (TYPE_NFIELDS (SYMBOL_TYPE (syms[i].sym))
4560 != TYPE_NFIELDS (SYMBOL_TYPE (syms[0].sym)))
4563 /* All the sanity checks passed, so we might have a set of
4564 identical enumeration types. Perform a more complete
4565 comparison of the type of each symbol. */
4566 for (i = 1; i < nsyms; i++)
4567 if (!ada_identical_enum_types_p (SYMBOL_TYPE (syms[i].sym),
4568 SYMBOL_TYPE (syms[0].sym)))
4574 /* Remove any non-debugging symbols in SYMS[0 .. NSYMS-1] that definitely
4575 duplicate other symbols in the list (The only case I know of where
4576 this happens is when object files containing stabs-in-ecoff are
4577 linked with files containing ordinary ecoff debugging symbols (or no
4578 debugging symbols)). Modifies SYMS to squeeze out deleted entries.
4579 Returns the number of items in the modified list. */
4582 remove_extra_symbols (struct ada_symbol_info *syms, int nsyms)
4586 /* We should never be called with less than 2 symbols, as there
4587 cannot be any extra symbol in that case. But it's easy to
4588 handle, since we have nothing to do in that case. */
4597 /* If two symbols have the same name and one of them is a stub type,
4598 the get rid of the stub. */
4600 if (TYPE_STUB (SYMBOL_TYPE (syms[i].sym))
4601 && SYMBOL_LINKAGE_NAME (syms[i].sym) != NULL)
4603 for (j = 0; j < nsyms; j++)
4606 && !TYPE_STUB (SYMBOL_TYPE (syms[j].sym))
4607 && SYMBOL_LINKAGE_NAME (syms[j].sym) != NULL
4608 && strcmp (SYMBOL_LINKAGE_NAME (syms[i].sym),
4609 SYMBOL_LINKAGE_NAME (syms[j].sym)) == 0)
4614 /* Two symbols with the same name, same class and same address
4615 should be identical. */
4617 else if (SYMBOL_LINKAGE_NAME (syms[i].sym) != NULL
4618 && SYMBOL_CLASS (syms[i].sym) == LOC_STATIC
4619 && is_nondebugging_type (SYMBOL_TYPE (syms[i].sym)))
4621 for (j = 0; j < nsyms; j += 1)
4624 && SYMBOL_LINKAGE_NAME (syms[j].sym) != NULL
4625 && strcmp (SYMBOL_LINKAGE_NAME (syms[i].sym),
4626 SYMBOL_LINKAGE_NAME (syms[j].sym)) == 0
4627 && SYMBOL_CLASS (syms[i].sym) == SYMBOL_CLASS (syms[j].sym)
4628 && SYMBOL_VALUE_ADDRESS (syms[i].sym)
4629 == SYMBOL_VALUE_ADDRESS (syms[j].sym))
4636 for (j = i + 1; j < nsyms; j += 1)
4637 syms[j - 1] = syms[j];
4644 /* If all the remaining symbols are identical enumerals, then
4645 just keep the first one and discard the rest.
4647 Unlike what we did previously, we do not discard any entry
4648 unless they are ALL identical. This is because the symbol
4649 comparison is not a strict comparison, but rather a practical
4650 comparison. If all symbols are considered identical, then
4651 we can just go ahead and use the first one and discard the rest.
4652 But if we cannot reduce the list to a single element, we have
4653 to ask the user to disambiguate anyways. And if we have to
4654 present a multiple-choice menu, it's less confusing if the list
4655 isn't missing some choices that were identical and yet distinct. */
4656 if (symbols_are_identical_enums (syms, nsyms))
4662 /* Given a type that corresponds to a renaming entity, use the type name
4663 to extract the scope (package name or function name, fully qualified,
4664 and following the GNAT encoding convention) where this renaming has been
4665 defined. The string returned needs to be deallocated after use. */
4668 xget_renaming_scope (struct type *renaming_type)
4670 /* The renaming types adhere to the following convention:
4671 <scope>__<rename>___<XR extension>.
4672 So, to extract the scope, we search for the "___XR" extension,
4673 and then backtrack until we find the first "__". */
4675 const char *name = type_name_no_tag (renaming_type);
4676 char *suffix = strstr (name, "___XR");
4681 /* Now, backtrack a bit until we find the first "__". Start looking
4682 at suffix - 3, as the <rename> part is at least one character long. */
4684 for (last = suffix - 3; last > name; last--)
4685 if (last[0] == '_' && last[1] == '_')
4688 /* Make a copy of scope and return it. */
4690 scope_len = last - name;
4691 scope = (char *) xmalloc ((scope_len + 1) * sizeof (char));
4693 strncpy (scope, name, scope_len);
4694 scope[scope_len] = '\0';
4699 /* Return nonzero if NAME corresponds to a package name. */
4702 is_package_name (const char *name)
4704 /* Here, We take advantage of the fact that no symbols are generated
4705 for packages, while symbols are generated for each function.
4706 So the condition for NAME represent a package becomes equivalent
4707 to NAME not existing in our list of symbols. There is only one
4708 small complication with library-level functions (see below). */
4712 /* If it is a function that has not been defined at library level,
4713 then we should be able to look it up in the symbols. */
4714 if (standard_lookup (name, NULL, VAR_DOMAIN) != NULL)
4717 /* Library-level function names start with "_ada_". See if function
4718 "_ada_" followed by NAME can be found. */
4720 /* Do a quick check that NAME does not contain "__", since library-level
4721 functions names cannot contain "__" in them. */
4722 if (strstr (name, "__") != NULL)
4725 fun_name = xstrprintf ("_ada_%s", name);
4727 return (standard_lookup (fun_name, NULL, VAR_DOMAIN) == NULL);
4730 /* Return nonzero if SYM corresponds to a renaming entity that is
4731 not visible from FUNCTION_NAME. */
4734 old_renaming_is_invisible (const struct symbol *sym, const char *function_name)
4737 struct cleanup *old_chain;
4739 if (SYMBOL_CLASS (sym) != LOC_TYPEDEF)
4742 scope = xget_renaming_scope (SYMBOL_TYPE (sym));
4743 old_chain = make_cleanup (xfree, scope);
4745 /* If the rename has been defined in a package, then it is visible. */
4746 if (is_package_name (scope))
4748 do_cleanups (old_chain);
4752 /* Check that the rename is in the current function scope by checking
4753 that its name starts with SCOPE. */
4755 /* If the function name starts with "_ada_", it means that it is
4756 a library-level function. Strip this prefix before doing the
4757 comparison, as the encoding for the renaming does not contain
4759 if (strncmp (function_name, "_ada_", 5) == 0)
4763 int is_invisible = strncmp (function_name, scope, strlen (scope)) != 0;
4765 do_cleanups (old_chain);
4766 return is_invisible;
4770 /* Remove entries from SYMS that corresponds to a renaming entity that
4771 is not visible from the function associated with CURRENT_BLOCK or
4772 that is superfluous due to the presence of more specific renaming
4773 information. Places surviving symbols in the initial entries of
4774 SYMS and returns the number of surviving symbols.
4777 First, in cases where an object renaming is implemented as a
4778 reference variable, GNAT may produce both the actual reference
4779 variable and the renaming encoding. In this case, we discard the
4782 Second, GNAT emits a type following a specified encoding for each renaming
4783 entity. Unfortunately, STABS currently does not support the definition
4784 of types that are local to a given lexical block, so all renamings types
4785 are emitted at library level. As a consequence, if an application
4786 contains two renaming entities using the same name, and a user tries to
4787 print the value of one of these entities, the result of the ada symbol
4788 lookup will also contain the wrong renaming type.
4790 This function partially covers for this limitation by attempting to
4791 remove from the SYMS list renaming symbols that should be visible
4792 from CURRENT_BLOCK. However, there does not seem be a 100% reliable
4793 method with the current information available. The implementation
4794 below has a couple of limitations (FIXME: brobecker-2003-05-12):
4796 - When the user tries to print a rename in a function while there
4797 is another rename entity defined in a package: Normally, the
4798 rename in the function has precedence over the rename in the
4799 package, so the latter should be removed from the list. This is
4800 currently not the case.
4802 - This function will incorrectly remove valid renames if
4803 the CURRENT_BLOCK corresponds to a function which symbol name
4804 has been changed by an "Export" pragma. As a consequence,
4805 the user will be unable to print such rename entities. */
4808 remove_irrelevant_renamings (struct ada_symbol_info *syms,
4809 int nsyms, const struct block *current_block)
4811 struct symbol *current_function;
4812 const char *current_function_name;
4814 int is_new_style_renaming;
4816 /* If there is both a renaming foo___XR... encoded as a variable and
4817 a simple variable foo in the same block, discard the latter.
4818 First, zero out such symbols, then compress. */
4819 is_new_style_renaming = 0;
4820 for (i = 0; i < nsyms; i += 1)
4822 struct symbol *sym = syms[i].sym;
4823 const struct block *block = syms[i].block;
4827 if (sym == NULL || SYMBOL_CLASS (sym) == LOC_TYPEDEF)
4829 name = SYMBOL_LINKAGE_NAME (sym);
4830 suffix = strstr (name, "___XR");
4834 int name_len = suffix - name;
4837 is_new_style_renaming = 1;
4838 for (j = 0; j < nsyms; j += 1)
4839 if (i != j && syms[j].sym != NULL
4840 && strncmp (name, SYMBOL_LINKAGE_NAME (syms[j].sym),
4842 && block == syms[j].block)
4846 if (is_new_style_renaming)
4850 for (j = k = 0; j < nsyms; j += 1)
4851 if (syms[j].sym != NULL)
4859 /* Extract the function name associated to CURRENT_BLOCK.
4860 Abort if unable to do so. */
4862 if (current_block == NULL)
4865 current_function = block_linkage_function (current_block);
4866 if (current_function == NULL)
4869 current_function_name = SYMBOL_LINKAGE_NAME (current_function);
4870 if (current_function_name == NULL)
4873 /* Check each of the symbols, and remove it from the list if it is
4874 a type corresponding to a renaming that is out of the scope of
4875 the current block. */
4880 if (ada_parse_renaming (syms[i].sym, NULL, NULL, NULL)
4881 == ADA_OBJECT_RENAMING
4882 && old_renaming_is_invisible (syms[i].sym, current_function_name))
4886 for (j = i + 1; j < nsyms; j += 1)
4887 syms[j - 1] = syms[j];
4897 /* Add to OBSTACKP all symbols from BLOCK (and its super-blocks)
4898 whose name and domain match NAME and DOMAIN respectively.
4899 If no match was found, then extend the search to "enclosing"
4900 routines (in other words, if we're inside a nested function,
4901 search the symbols defined inside the enclosing functions).
4902 If WILD_MATCH_P is nonzero, perform the naming matching in
4903 "wild" mode (see function "wild_match" for more info).
4905 Note: This function assumes that OBSTACKP has 0 (zero) element in it. */
4908 ada_add_local_symbols (struct obstack *obstackp, const char *name,
4909 struct block *block, domain_enum domain,
4912 int block_depth = 0;
4914 while (block != NULL)
4917 ada_add_block_symbols (obstackp, block, name, domain, NULL,
4920 /* If we found a non-function match, assume that's the one. */
4921 if (is_nonfunction (defns_collected (obstackp, 0),
4922 num_defns_collected (obstackp)))
4925 block = BLOCK_SUPERBLOCK (block);
4928 /* If no luck so far, try to find NAME as a local symbol in some lexically
4929 enclosing subprogram. */
4930 if (num_defns_collected (obstackp) == 0 && block_depth > 2)
4931 add_symbols_from_enclosing_procs (obstackp, name, domain, wild_match_p);
4934 /* An object of this type is used as the user_data argument when
4935 calling the map_matching_symbols method. */
4939 struct objfile *objfile;
4940 struct obstack *obstackp;
4941 struct symbol *arg_sym;
4945 /* A callback for add_matching_symbols that adds SYM, found in BLOCK,
4946 to a list of symbols. DATA0 is a pointer to a struct match_data *
4947 containing the obstack that collects the symbol list, the file that SYM
4948 must come from, a flag indicating whether a non-argument symbol has
4949 been found in the current block, and the last argument symbol
4950 passed in SYM within the current block (if any). When SYM is null,
4951 marking the end of a block, the argument symbol is added if no
4952 other has been found. */
4955 aux_add_nonlocal_symbols (struct block *block, struct symbol *sym, void *data0)
4957 struct match_data *data = (struct match_data *) data0;
4961 if (!data->found_sym && data->arg_sym != NULL)
4962 add_defn_to_vec (data->obstackp,
4963 fixup_symbol_section (data->arg_sym, data->objfile),
4965 data->found_sym = 0;
4966 data->arg_sym = NULL;
4970 if (SYMBOL_CLASS (sym) == LOC_UNRESOLVED)
4972 else if (SYMBOL_IS_ARGUMENT (sym))
4973 data->arg_sym = sym;
4976 data->found_sym = 1;
4977 add_defn_to_vec (data->obstackp,
4978 fixup_symbol_section (sym, data->objfile),
4985 /* Compare STRING1 to STRING2, with results as for strcmp.
4986 Compatible with strcmp_iw in that strcmp_iw (STRING1, STRING2) <= 0
4987 implies compare_names (STRING1, STRING2) (they may differ as to
4988 what symbols compare equal). */
4991 compare_names (const char *string1, const char *string2)
4993 while (*string1 != '\0' && *string2 != '\0')
4995 if (isspace (*string1) || isspace (*string2))
4996 return strcmp_iw_ordered (string1, string2);
4997 if (*string1 != *string2)
5005 return strcmp_iw_ordered (string1, string2);
5007 if (*string2 == '\0')
5009 if (is_name_suffix (string1))
5016 if (*string2 == '(')
5017 return strcmp_iw_ordered (string1, string2);
5019 return *string1 - *string2;
5023 /* Add to OBSTACKP all non-local symbols whose name and domain match
5024 NAME and DOMAIN respectively. The search is performed on GLOBAL_BLOCK
5025 symbols if GLOBAL is non-zero, or on STATIC_BLOCK symbols otherwise. */
5028 add_nonlocal_symbols (struct obstack *obstackp, const char *name,
5029 domain_enum domain, int global,
5032 struct objfile *objfile;
5033 struct match_data data;
5035 memset (&data, 0, sizeof data);
5036 data.obstackp = obstackp;
5038 ALL_OBJFILES (objfile)
5040 data.objfile = objfile;
5043 objfile->sf->qf->map_matching_symbols (objfile, name, domain, global,
5044 aux_add_nonlocal_symbols, &data,
5047 objfile->sf->qf->map_matching_symbols (objfile, name, domain, global,
5048 aux_add_nonlocal_symbols, &data,
5049 full_match, compare_names);
5052 if (num_defns_collected (obstackp) == 0 && global && !is_wild_match)
5054 ALL_OBJFILES (objfile)
5056 char *name1 = alloca (strlen (name) + sizeof ("_ada_"));
5057 strcpy (name1, "_ada_");
5058 strcpy (name1 + sizeof ("_ada_") - 1, name);
5059 data.objfile = objfile;
5060 objfile->sf->qf->map_matching_symbols (objfile, name1, domain,
5062 aux_add_nonlocal_symbols,
5064 full_match, compare_names);
5069 /* Find symbols in DOMAIN matching NAME0, in BLOCK0 and, if full_search is
5070 non-zero, enclosing scope and in global scopes, returning the number of
5072 Sets *RESULTS to point to a vector of (SYM,BLOCK) tuples,
5073 indicating the symbols found and the blocks and symbol tables (if
5074 any) in which they were found. This vector is transient---good only to
5075 the next call of ada_lookup_symbol_list.
5077 When full_search is non-zero, any non-function/non-enumeral
5078 symbol match within the nest of blocks whose innermost member is BLOCK0,
5079 is the one match returned (no other matches in that or
5080 enclosing blocks is returned). If there are any matches in or
5081 surrounding BLOCK0, then these alone are returned.
5083 Names prefixed with "standard__" are handled specially: "standard__"
5084 is first stripped off, and only static and global symbols are searched. */
5087 ada_lookup_symbol_list_worker (const char *name0, const struct block *block0,
5088 domain_enum namespace,
5089 struct ada_symbol_info **results,
5093 struct block *block;
5095 const int wild_match_p = should_use_wild_match (name0);
5099 obstack_free (&symbol_list_obstack, NULL);
5100 obstack_init (&symbol_list_obstack);
5104 /* Search specified block and its superiors. */
5107 block = (struct block *) block0; /* FIXME: No cast ought to be
5108 needed, but adding const will
5109 have a cascade effect. */
5111 /* Special case: If the user specifies a symbol name inside package
5112 Standard, do a non-wild matching of the symbol name without
5113 the "standard__" prefix. This was primarily introduced in order
5114 to allow the user to specifically access the standard exceptions
5115 using, for instance, Standard.Constraint_Error when Constraint_Error
5116 is ambiguous (due to the user defining its own Constraint_Error
5117 entity inside its program). */
5118 if (strncmp (name0, "standard__", sizeof ("standard__") - 1) == 0)
5121 name = name0 + sizeof ("standard__") - 1;
5124 /* Check the non-global symbols. If we have ANY match, then we're done. */
5130 ada_add_local_symbols (&symbol_list_obstack, name, block,
5131 namespace, wild_match_p);
5135 /* In the !full_search case we're are being called by
5136 ada_iterate_over_symbols, and we don't want to search
5138 ada_add_block_symbols (&symbol_list_obstack, block, name,
5139 namespace, NULL, wild_match_p);
5141 if (num_defns_collected (&symbol_list_obstack) > 0 || !full_search)
5145 /* No non-global symbols found. Check our cache to see if we have
5146 already performed this search before. If we have, then return
5150 if (lookup_cached_symbol (name0, namespace, &sym, &block))
5153 add_defn_to_vec (&symbol_list_obstack, sym, block);
5157 /* Search symbols from all global blocks. */
5159 add_nonlocal_symbols (&symbol_list_obstack, name, namespace, 1,
5162 /* Now add symbols from all per-file blocks if we've gotten no hits
5163 (not strictly correct, but perhaps better than an error). */
5165 if (num_defns_collected (&symbol_list_obstack) == 0)
5166 add_nonlocal_symbols (&symbol_list_obstack, name, namespace, 0,
5170 ndefns = num_defns_collected (&symbol_list_obstack);
5171 *results = defns_collected (&symbol_list_obstack, 1);
5173 ndefns = remove_extra_symbols (*results, ndefns);
5175 if (ndefns == 0 && full_search)
5176 cache_symbol (name0, namespace, NULL, NULL);
5178 if (ndefns == 1 && full_search && cacheIfUnique)
5179 cache_symbol (name0, namespace, (*results)[0].sym, (*results)[0].block);
5181 ndefns = remove_irrelevant_renamings (*results, ndefns, block0);
5186 /* Find symbols in DOMAIN matching NAME0, in BLOCK0 and enclosing scope and
5187 in global scopes, returning the number of matches, and setting *RESULTS
5188 to a vector of (SYM,BLOCK) tuples.
5189 See ada_lookup_symbol_list_worker for further details. */
5192 ada_lookup_symbol_list (const char *name0, const struct block *block0,
5193 domain_enum domain, struct ada_symbol_info **results)
5195 return ada_lookup_symbol_list_worker (name0, block0, domain, results, 1);
5198 /* Implementation of the la_iterate_over_symbols method. */
5201 ada_iterate_over_symbols (const struct block *block,
5202 const char *name, domain_enum domain,
5203 symbol_found_callback_ftype *callback,
5207 struct ada_symbol_info *results;
5209 ndefs = ada_lookup_symbol_list_worker (name, block, domain, &results, 0);
5210 for (i = 0; i < ndefs; ++i)
5212 if (! (*callback) (results[i].sym, data))
5217 /* If NAME is the name of an entity, return a string that should
5218 be used to look that entity up in Ada units. This string should
5219 be deallocated after use using xfree.
5221 NAME can have any form that the "break" or "print" commands might
5222 recognize. In other words, it does not have to be the "natural"
5223 name, or the "encoded" name. */
5226 ada_name_for_lookup (const char *name)
5229 int nlen = strlen (name);
5231 if (name[0] == '<' && name[nlen - 1] == '>')
5233 canon = xmalloc (nlen - 1);
5234 memcpy (canon, name + 1, nlen - 2);
5235 canon[nlen - 2] = '\0';
5238 canon = xstrdup (ada_encode (ada_fold_name (name)));
5242 /* The result is as for ada_lookup_symbol_list with FULL_SEARCH set
5243 to 1, but choosing the first symbol found if there are multiple
5246 The result is stored in *INFO, which must be non-NULL.
5247 If no match is found, INFO->SYM is set to NULL. */
5250 ada_lookup_encoded_symbol (const char *name, const struct block *block,
5251 domain_enum namespace,
5252 struct ada_symbol_info *info)
5254 struct ada_symbol_info *candidates;
5257 gdb_assert (info != NULL);
5258 memset (info, 0, sizeof (struct ada_symbol_info));
5260 n_candidates = ada_lookup_symbol_list (name, block, namespace, &candidates);
5261 if (n_candidates == 0)
5264 *info = candidates[0];
5265 info->sym = fixup_symbol_section (info->sym, NULL);
5268 /* Return a symbol in DOMAIN matching NAME, in BLOCK0 and enclosing
5269 scope and in global scopes, or NULL if none. NAME is folded and
5270 encoded first. Otherwise, the result is as for ada_lookup_symbol_list,
5271 choosing the first symbol if there are multiple choices.
5272 If IS_A_FIELD_OF_THIS is not NULL, it is set to zero. */
5275 ada_lookup_symbol (const char *name, const struct block *block0,
5276 domain_enum namespace, int *is_a_field_of_this)
5278 struct ada_symbol_info info;
5280 if (is_a_field_of_this != NULL)
5281 *is_a_field_of_this = 0;
5283 ada_lookup_encoded_symbol (ada_encode (ada_fold_name (name)),
5284 block0, namespace, &info);
5288 static struct symbol *
5289 ada_lookup_symbol_nonlocal (const char *name,
5290 const struct block *block,
5291 const domain_enum domain)
5293 return ada_lookup_symbol (name, block_static_block (block), domain, NULL);
5297 /* True iff STR is a possible encoded suffix of a normal Ada name
5298 that is to be ignored for matching purposes. Suffixes of parallel
5299 names (e.g., XVE) are not included here. Currently, the possible suffixes
5300 are given by any of the regular expressions:
5302 [.$][0-9]+ [nested subprogram suffix, on platforms such as GNU/Linux]
5303 ___[0-9]+ [nested subprogram suffix, on platforms such as HP/UX]
5304 TKB [subprogram suffix for task bodies]
5305 _E[0-9]+[bs]$ [protected object entry suffixes]
5306 (X[nb]*)?((\$|__)[0-9](_?[0-9]+)|___(JM|LJM|X([FDBUP].*|R[^T]?)))?$
5308 Also, any leading "__[0-9]+" sequence is skipped before the suffix
5309 match is performed. This sequence is used to differentiate homonyms,
5310 is an optional part of a valid name suffix. */
5313 is_name_suffix (const char *str)
5316 const char *matching;
5317 const int len = strlen (str);
5319 /* Skip optional leading __[0-9]+. */
5321 if (len > 3 && str[0] == '_' && str[1] == '_' && isdigit (str[2]))
5324 while (isdigit (str[0]))
5330 if (str[0] == '.' || str[0] == '$')
5333 while (isdigit (matching[0]))
5335 if (matching[0] == '\0')
5341 if (len > 3 && str[0] == '_' && str[1] == '_' && str[2] == '_')
5344 while (isdigit (matching[0]))
5346 if (matching[0] == '\0')
5350 /* "TKB" suffixes are used for subprograms implementing task bodies. */
5352 if (strcmp (str, "TKB") == 0)
5356 /* FIXME: brobecker/2005-09-23: Protected Object subprograms end
5357 with a N at the end. Unfortunately, the compiler uses the same
5358 convention for other internal types it creates. So treating
5359 all entity names that end with an "N" as a name suffix causes
5360 some regressions. For instance, consider the case of an enumerated
5361 type. To support the 'Image attribute, it creates an array whose
5363 Having a single character like this as a suffix carrying some
5364 information is a bit risky. Perhaps we should change the encoding
5365 to be something like "_N" instead. In the meantime, do not do
5366 the following check. */
5367 /* Protected Object Subprograms */
5368 if (len == 1 && str [0] == 'N')
5373 if (len > 3 && str[0] == '_' && str [1] == 'E' && isdigit (str[2]))
5376 while (isdigit (matching[0]))
5378 if ((matching[0] == 'b' || matching[0] == 's')
5379 && matching [1] == '\0')
5383 /* ??? We should not modify STR directly, as we are doing below. This
5384 is fine in this case, but may become problematic later if we find
5385 that this alternative did not work, and want to try matching
5386 another one from the begining of STR. Since we modified it, we
5387 won't be able to find the begining of the string anymore! */
5391 while (str[0] != '_' && str[0] != '\0')
5393 if (str[0] != 'n' && str[0] != 'b')
5399 if (str[0] == '\000')
5404 if (str[1] != '_' || str[2] == '\000')
5408 if (strcmp (str + 3, "JM") == 0)
5410 /* FIXME: brobecker/2004-09-30: GNAT will soon stop using
5411 the LJM suffix in favor of the JM one. But we will
5412 still accept LJM as a valid suffix for a reasonable
5413 amount of time, just to allow ourselves to debug programs
5414 compiled using an older version of GNAT. */
5415 if (strcmp (str + 3, "LJM") == 0)
5419 if (str[4] == 'F' || str[4] == 'D' || str[4] == 'B'
5420 || str[4] == 'U' || str[4] == 'P')
5422 if (str[4] == 'R' && str[5] != 'T')
5426 if (!isdigit (str[2]))
5428 for (k = 3; str[k] != '\0'; k += 1)
5429 if (!isdigit (str[k]) && str[k] != '_')
5433 if (str[0] == '$' && isdigit (str[1]))
5435 for (k = 2; str[k] != '\0'; k += 1)
5436 if (!isdigit (str[k]) && str[k] != '_')
5443 /* Return non-zero if the string starting at NAME and ending before
5444 NAME_END contains no capital letters. */
5447 is_valid_name_for_wild_match (const char *name0)
5449 const char *decoded_name = ada_decode (name0);
5452 /* If the decoded name starts with an angle bracket, it means that
5453 NAME0 does not follow the GNAT encoding format. It should then
5454 not be allowed as a possible wild match. */
5455 if (decoded_name[0] == '<')
5458 for (i=0; decoded_name[i] != '\0'; i++)
5459 if (isalpha (decoded_name[i]) && !islower (decoded_name[i]))
5465 /* Advance *NAMEP to next occurrence of TARGET0 in the string NAME0
5466 that could start a simple name. Assumes that *NAMEP points into
5467 the string beginning at NAME0. */
5470 advance_wild_match (const char **namep, const char *name0, int target0)
5472 const char *name = *namep;
5482 if ((t1 >= 'a' && t1 <= 'z') || (t1 >= '0' && t1 <= '9'))
5485 if (name == name0 + 5 && strncmp (name0, "_ada", 4) == 0)
5490 else if (t1 == '_' && ((name[2] >= 'a' && name[2] <= 'z')
5491 || name[2] == target0))
5499 else if ((t0 >= 'a' && t0 <= 'z') || (t0 >= '0' && t0 <= '9'))
5509 /* Return 0 iff NAME encodes a name of the form prefix.PATN. Ignores any
5510 informational suffixes of NAME (i.e., for which is_name_suffix is
5511 true). Assumes that PATN is a lower-cased Ada simple name. */
5514 wild_match (const char *name, const char *patn)
5517 const char *name0 = name;
5521 const char *match = name;
5525 for (name += 1, p = patn + 1; *p != '\0'; name += 1, p += 1)
5528 if (*p == '\0' && is_name_suffix (name))
5529 return match != name0 && !is_valid_name_for_wild_match (name0);
5531 if (name[-1] == '_')
5534 if (!advance_wild_match (&name, name0, *patn))
5539 /* Returns 0 iff symbol name SYM_NAME matches SEARCH_NAME, apart from
5540 informational suffix. */
5543 full_match (const char *sym_name, const char *search_name)
5545 return !match_name (sym_name, search_name, 0);
5549 /* Add symbols from BLOCK matching identifier NAME in DOMAIN to
5550 vector *defn_symbols, updating the list of symbols in OBSTACKP
5551 (if necessary). If WILD, treat as NAME with a wildcard prefix.
5552 OBJFILE is the section containing BLOCK. */
5555 ada_add_block_symbols (struct obstack *obstackp,
5556 struct block *block, const char *name,
5557 domain_enum domain, struct objfile *objfile,
5560 struct block_iterator iter;
5561 int name_len = strlen (name);
5562 /* A matching argument symbol, if any. */
5563 struct symbol *arg_sym;
5564 /* Set true when we find a matching non-argument symbol. */
5572 for (sym = block_iter_match_first (block, name, wild_match, &iter);
5573 sym != NULL; sym = block_iter_match_next (name, wild_match, &iter))
5575 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
5576 SYMBOL_DOMAIN (sym), domain)
5577 && wild_match (SYMBOL_LINKAGE_NAME (sym), name) == 0)
5579 if (SYMBOL_CLASS (sym) == LOC_UNRESOLVED)
5581 else if (SYMBOL_IS_ARGUMENT (sym))
5586 add_defn_to_vec (obstackp,
5587 fixup_symbol_section (sym, objfile),
5595 for (sym = block_iter_match_first (block, name, full_match, &iter);
5596 sym != NULL; sym = block_iter_match_next (name, full_match, &iter))
5598 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
5599 SYMBOL_DOMAIN (sym), domain))
5601 if (SYMBOL_CLASS (sym) != LOC_UNRESOLVED)
5603 if (SYMBOL_IS_ARGUMENT (sym))
5608 add_defn_to_vec (obstackp,
5609 fixup_symbol_section (sym, objfile),
5617 if (!found_sym && arg_sym != NULL)
5619 add_defn_to_vec (obstackp,
5620 fixup_symbol_section (arg_sym, objfile),
5629 ALL_BLOCK_SYMBOLS (block, iter, sym)
5631 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
5632 SYMBOL_DOMAIN (sym), domain))
5636 cmp = (int) '_' - (int) SYMBOL_LINKAGE_NAME (sym)[0];
5639 cmp = strncmp ("_ada_", SYMBOL_LINKAGE_NAME (sym), 5);
5641 cmp = strncmp (name, SYMBOL_LINKAGE_NAME (sym) + 5,
5646 && is_name_suffix (SYMBOL_LINKAGE_NAME (sym) + name_len + 5))
5648 if (SYMBOL_CLASS (sym) != LOC_UNRESOLVED)
5650 if (SYMBOL_IS_ARGUMENT (sym))
5655 add_defn_to_vec (obstackp,
5656 fixup_symbol_section (sym, objfile),
5664 /* NOTE: This really shouldn't be needed for _ada_ symbols.
5665 They aren't parameters, right? */
5666 if (!found_sym && arg_sym != NULL)
5668 add_defn_to_vec (obstackp,
5669 fixup_symbol_section (arg_sym, objfile),
5676 /* Symbol Completion */
5678 /* If SYM_NAME is a completion candidate for TEXT, return this symbol
5679 name in a form that's appropriate for the completion. The result
5680 does not need to be deallocated, but is only good until the next call.
5682 TEXT_LEN is equal to the length of TEXT.
5683 Perform a wild match if WILD_MATCH_P is set.
5684 ENCODED_P should be set if TEXT represents the start of a symbol name
5685 in its encoded form. */
5688 symbol_completion_match (const char *sym_name,
5689 const char *text, int text_len,
5690 int wild_match_p, int encoded_p)
5692 const int verbatim_match = (text[0] == '<');
5697 /* Strip the leading angle bracket. */
5702 /* First, test against the fully qualified name of the symbol. */
5704 if (strncmp (sym_name, text, text_len) == 0)
5707 if (match && !encoded_p)
5709 /* One needed check before declaring a positive match is to verify
5710 that iff we are doing a verbatim match, the decoded version
5711 of the symbol name starts with '<'. Otherwise, this symbol name
5712 is not a suitable completion. */
5713 const char *sym_name_copy = sym_name;
5714 int has_angle_bracket;
5716 sym_name = ada_decode (sym_name);
5717 has_angle_bracket = (sym_name[0] == '<');
5718 match = (has_angle_bracket == verbatim_match);
5719 sym_name = sym_name_copy;
5722 if (match && !verbatim_match)
5724 /* When doing non-verbatim match, another check that needs to
5725 be done is to verify that the potentially matching symbol name
5726 does not include capital letters, because the ada-mode would
5727 not be able to understand these symbol names without the
5728 angle bracket notation. */
5731 for (tmp = sym_name; *tmp != '\0' && !isupper (*tmp); tmp++);
5736 /* Second: Try wild matching... */
5738 if (!match && wild_match_p)
5740 /* Since we are doing wild matching, this means that TEXT
5741 may represent an unqualified symbol name. We therefore must
5742 also compare TEXT against the unqualified name of the symbol. */
5743 sym_name = ada_unqualified_name (ada_decode (sym_name));
5745 if (strncmp (sym_name, text, text_len) == 0)
5749 /* Finally: If we found a mach, prepare the result to return. */
5755 sym_name = add_angle_brackets (sym_name);
5758 sym_name = ada_decode (sym_name);
5763 /* A companion function to ada_make_symbol_completion_list().
5764 Check if SYM_NAME represents a symbol which name would be suitable
5765 to complete TEXT (TEXT_LEN is the length of TEXT), in which case
5766 it is appended at the end of the given string vector SV.
5768 ORIG_TEXT is the string original string from the user command
5769 that needs to be completed. WORD is the entire command on which
5770 completion should be performed. These two parameters are used to
5771 determine which part of the symbol name should be added to the
5773 if WILD_MATCH_P is set, then wild matching is performed.
5774 ENCODED_P should be set if TEXT represents a symbol name in its
5775 encoded formed (in which case the completion should also be
5779 symbol_completion_add (VEC(char_ptr) **sv,
5780 const char *sym_name,
5781 const char *text, int text_len,
5782 const char *orig_text, const char *word,
5783 int wild_match_p, int encoded_p)
5785 const char *match = symbol_completion_match (sym_name, text, text_len,
5786 wild_match_p, encoded_p);
5792 /* We found a match, so add the appropriate completion to the given
5795 if (word == orig_text)
5797 completion = xmalloc (strlen (match) + 5);
5798 strcpy (completion, match);
5800 else if (word > orig_text)
5802 /* Return some portion of sym_name. */
5803 completion = xmalloc (strlen (match) + 5);
5804 strcpy (completion, match + (word - orig_text));
5808 /* Return some of ORIG_TEXT plus sym_name. */
5809 completion = xmalloc (strlen (match) + (orig_text - word) + 5);
5810 strncpy (completion, word, orig_text - word);
5811 completion[orig_text - word] = '\0';
5812 strcat (completion, match);
5815 VEC_safe_push (char_ptr, *sv, completion);
5818 /* An object of this type is passed as the user_data argument to the
5819 expand_partial_symbol_names method. */
5820 struct add_partial_datum
5822 VEC(char_ptr) **completions;
5831 /* A callback for expand_partial_symbol_names. */
5833 ada_expand_partial_symbol_name (const char *name, void *user_data)
5835 struct add_partial_datum *data = user_data;
5837 return symbol_completion_match (name, data->text, data->text_len,
5838 data->wild_match, data->encoded) != NULL;
5841 /* Return a list of possible symbol names completing TEXT0. WORD is
5842 the entire command on which completion is made. */
5844 static VEC (char_ptr) *
5845 ada_make_symbol_completion_list (const char *text0, const char *word,
5846 enum type_code code)
5852 VEC(char_ptr) *completions = VEC_alloc (char_ptr, 128);
5855 struct minimal_symbol *msymbol;
5856 struct objfile *objfile;
5857 struct block *b, *surrounding_static_block = 0;
5859 struct block_iterator iter;
5860 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
5862 gdb_assert (code == TYPE_CODE_UNDEF);
5864 if (text0[0] == '<')
5866 text = xstrdup (text0);
5867 make_cleanup (xfree, text);
5868 text_len = strlen (text);
5874 text = xstrdup (ada_encode (text0));
5875 make_cleanup (xfree, text);
5876 text_len = strlen (text);
5877 for (i = 0; i < text_len; i++)
5878 text[i] = tolower (text[i]);
5880 encoded_p = (strstr (text0, "__") != NULL);
5881 /* If the name contains a ".", then the user is entering a fully
5882 qualified entity name, and the match must not be done in wild
5883 mode. Similarly, if the user wants to complete what looks like
5884 an encoded name, the match must not be done in wild mode. */
5885 wild_match_p = (strchr (text0, '.') == NULL && !encoded_p);
5888 /* First, look at the partial symtab symbols. */
5890 struct add_partial_datum data;
5892 data.completions = &completions;
5894 data.text_len = text_len;
5897 data.wild_match = wild_match_p;
5898 data.encoded = encoded_p;
5899 expand_partial_symbol_names (ada_expand_partial_symbol_name, &data);
5902 /* At this point scan through the misc symbol vectors and add each
5903 symbol you find to the list. Eventually we want to ignore
5904 anything that isn't a text symbol (everything else will be
5905 handled by the psymtab code above). */
5907 ALL_MSYMBOLS (objfile, msymbol)
5910 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (msymbol),
5911 text, text_len, text0, word, wild_match_p,
5915 /* Search upwards from currently selected frame (so that we can
5916 complete on local vars. */
5918 for (b = get_selected_block (0); b != NULL; b = BLOCK_SUPERBLOCK (b))
5920 if (!BLOCK_SUPERBLOCK (b))
5921 surrounding_static_block = b; /* For elmin of dups */
5923 ALL_BLOCK_SYMBOLS (b, iter, sym)
5925 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
5926 text, text_len, text0, word,
5927 wild_match_p, encoded_p);
5931 /* Go through the symtabs and check the externs and statics for
5932 symbols which match. */
5934 ALL_SYMTABS (objfile, s)
5937 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
5938 ALL_BLOCK_SYMBOLS (b, iter, sym)
5940 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
5941 text, text_len, text0, word,
5942 wild_match_p, encoded_p);
5946 ALL_SYMTABS (objfile, s)
5949 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
5950 /* Don't do this block twice. */
5951 if (b == surrounding_static_block)
5953 ALL_BLOCK_SYMBOLS (b, iter, sym)
5955 symbol_completion_add (&completions, SYMBOL_LINKAGE_NAME (sym),
5956 text, text_len, text0, word,
5957 wild_match_p, encoded_p);
5961 do_cleanups (old_chain);
5967 /* Return non-zero if TYPE is a pointer to the GNAT dispatch table used
5968 for tagged types. */
5971 ada_is_dispatch_table_ptr_type (struct type *type)
5975 if (TYPE_CODE (type) != TYPE_CODE_PTR)
5978 name = TYPE_NAME (TYPE_TARGET_TYPE (type));
5982 return (strcmp (name, "ada__tags__dispatch_table") == 0);
5985 /* Return non-zero if TYPE is an interface tag. */
5988 ada_is_interface_tag (struct type *type)
5990 const char *name = TYPE_NAME (type);
5995 return (strcmp (name, "ada__tags__interface_tag") == 0);
5998 /* True if field number FIELD_NUM in struct or union type TYPE is supposed
5999 to be invisible to users. */
6002 ada_is_ignored_field (struct type *type, int field_num)
6004 if (field_num < 0 || field_num > TYPE_NFIELDS (type))
6007 /* Check the name of that field. */
6009 const char *name = TYPE_FIELD_NAME (type, field_num);
6011 /* Anonymous field names should not be printed.
6012 brobecker/2007-02-20: I don't think this can actually happen
6013 but we don't want to print the value of annonymous fields anyway. */
6017 /* Normally, fields whose name start with an underscore ("_")
6018 are fields that have been internally generated by the compiler,
6019 and thus should not be printed. The "_parent" field is special,
6020 however: This is a field internally generated by the compiler
6021 for tagged types, and it contains the components inherited from
6022 the parent type. This field should not be printed as is, but
6023 should not be ignored either. */
6024 if (name[0] == '_' && strncmp (name, "_parent", 7) != 0)
6028 /* If this is the dispatch table of a tagged type or an interface tag,
6030 if (ada_is_tagged_type (type, 1)
6031 && (ada_is_dispatch_table_ptr_type (TYPE_FIELD_TYPE (type, field_num))
6032 || ada_is_interface_tag (TYPE_FIELD_TYPE (type, field_num))))
6035 /* Not a special field, so it should not be ignored. */
6039 /* True iff TYPE has a tag field. If REFOK, then TYPE may also be a
6040 pointer or reference type whose ultimate target has a tag field. */
6043 ada_is_tagged_type (struct type *type, int refok)
6045 return (ada_lookup_struct_elt_type (type, "_tag", refok, 1, NULL) != NULL);
6048 /* True iff TYPE represents the type of X'Tag */
6051 ada_is_tag_type (struct type *type)
6053 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_PTR)
6057 const char *name = ada_type_name (TYPE_TARGET_TYPE (type));
6059 return (name != NULL
6060 && strcmp (name, "ada__tags__dispatch_table") == 0);
6064 /* The type of the tag on VAL. */
6067 ada_tag_type (struct value *val)
6069 return ada_lookup_struct_elt_type (value_type (val), "_tag", 1, 0, NULL);
6072 /* Return 1 if TAG follows the old scheme for Ada tags (used for Ada 95,
6073 retired at Ada 05). */
6076 is_ada95_tag (struct value *tag)
6078 return ada_value_struct_elt (tag, "tsd", 1) != NULL;
6081 /* The value of the tag on VAL. */
6084 ada_value_tag (struct value *val)
6086 return ada_value_struct_elt (val, "_tag", 0);
6089 /* The value of the tag on the object of type TYPE whose contents are
6090 saved at VALADDR, if it is non-null, or is at memory address
6093 static struct value *
6094 value_tag_from_contents_and_address (struct type *type,
6095 const gdb_byte *valaddr,
6098 int tag_byte_offset;
6099 struct type *tag_type;
6101 if (find_struct_field ("_tag", type, 0, &tag_type, &tag_byte_offset,
6104 const gdb_byte *valaddr1 = ((valaddr == NULL)
6106 : valaddr + tag_byte_offset);
6107 CORE_ADDR address1 = (address == 0) ? 0 : address + tag_byte_offset;
6109 return value_from_contents_and_address (tag_type, valaddr1, address1);
6114 static struct type *
6115 type_from_tag (struct value *tag)
6117 const char *type_name = ada_tag_name (tag);
6119 if (type_name != NULL)
6120 return ada_find_any_type (ada_encode (type_name));
6124 /* Given a value OBJ of a tagged type, return a value of this
6125 type at the base address of the object. The base address, as
6126 defined in Ada.Tags, it is the address of the primary tag of
6127 the object, and therefore where the field values of its full
6128 view can be fetched. */
6131 ada_tag_value_at_base_address (struct value *obj)
6133 volatile struct gdb_exception e;
6135 LONGEST offset_to_top = 0;
6136 struct type *ptr_type, *obj_type;
6138 CORE_ADDR base_address;
6140 obj_type = value_type (obj);
6142 /* It is the responsability of the caller to deref pointers. */
6144 if (TYPE_CODE (obj_type) == TYPE_CODE_PTR
6145 || TYPE_CODE (obj_type) == TYPE_CODE_REF)
6148 tag = ada_value_tag (obj);
6152 /* Base addresses only appeared with Ada 05 and multiple inheritance. */
6154 if (is_ada95_tag (tag))
6157 ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr;
6158 ptr_type = lookup_pointer_type (ptr_type);
6159 val = value_cast (ptr_type, tag);
6163 /* It is perfectly possible that an exception be raised while
6164 trying to determine the base address, just like for the tag;
6165 see ada_tag_name for more details. We do not print the error
6166 message for the same reason. */
6168 TRY_CATCH (e, RETURN_MASK_ERROR)
6170 offset_to_top = value_as_long (value_ind (value_ptradd (val, -2)));
6176 /* If offset is null, nothing to do. */
6178 if (offset_to_top == 0)
6181 /* -1 is a special case in Ada.Tags; however, what should be done
6182 is not quite clear from the documentation. So do nothing for
6185 if (offset_to_top == -1)
6188 base_address = value_address (obj) - offset_to_top;
6189 tag = value_tag_from_contents_and_address (obj_type, NULL, base_address);
6191 /* Make sure that we have a proper tag at the new address.
6192 Otherwise, offset_to_top is bogus (which can happen when
6193 the object is not initialized yet). */
6198 obj_type = type_from_tag (tag);
6203 return value_from_contents_and_address (obj_type, NULL, base_address);
6206 /* Return the "ada__tags__type_specific_data" type. */
6208 static struct type *
6209 ada_get_tsd_type (struct inferior *inf)
6211 struct ada_inferior_data *data = get_ada_inferior_data (inf);
6213 if (data->tsd_type == 0)
6214 data->tsd_type = ada_find_any_type ("ada__tags__type_specific_data");
6215 return data->tsd_type;
6218 /* Return the TSD (type-specific data) associated to the given TAG.
6219 TAG is assumed to be the tag of a tagged-type entity.
6221 May return NULL if we are unable to get the TSD. */
6223 static struct value *
6224 ada_get_tsd_from_tag (struct value *tag)
6229 /* First option: The TSD is simply stored as a field of our TAG.
6230 Only older versions of GNAT would use this format, but we have
6231 to test it first, because there are no visible markers for
6232 the current approach except the absence of that field. */
6234 val = ada_value_struct_elt (tag, "tsd", 1);
6238 /* Try the second representation for the dispatch table (in which
6239 there is no explicit 'tsd' field in the referent of the tag pointer,
6240 and instead the tsd pointer is stored just before the dispatch
6243 type = ada_get_tsd_type (current_inferior());
6246 type = lookup_pointer_type (lookup_pointer_type (type));
6247 val = value_cast (type, tag);
6250 return value_ind (value_ptradd (val, -1));
6253 /* Given the TSD of a tag (type-specific data), return a string
6254 containing the name of the associated type.
6256 The returned value is good until the next call. May return NULL
6257 if we are unable to determine the tag name. */
6260 ada_tag_name_from_tsd (struct value *tsd)
6262 static char name[1024];
6266 val = ada_value_struct_elt (tsd, "expanded_name", 1);
6269 read_memory_string (value_as_address (val), name, sizeof (name) - 1);
6270 for (p = name; *p != '\0'; p += 1)
6276 /* The type name of the dynamic type denoted by the 'tag value TAG, as
6279 Return NULL if the TAG is not an Ada tag, or if we were unable to
6280 determine the name of that tag. The result is good until the next
6284 ada_tag_name (struct value *tag)
6286 volatile struct gdb_exception e;
6289 if (!ada_is_tag_type (value_type (tag)))
6292 /* It is perfectly possible that an exception be raised while trying
6293 to determine the TAG's name, even under normal circumstances:
6294 The associated variable may be uninitialized or corrupted, for
6295 instance. We do not let any exception propagate past this point.
6296 instead we return NULL.
6298 We also do not print the error message either (which often is very
6299 low-level (Eg: "Cannot read memory at 0x[...]"), but instead let
6300 the caller print a more meaningful message if necessary. */
6301 TRY_CATCH (e, RETURN_MASK_ERROR)
6303 struct value *tsd = ada_get_tsd_from_tag (tag);
6306 name = ada_tag_name_from_tsd (tsd);
6312 /* The parent type of TYPE, or NULL if none. */
6315 ada_parent_type (struct type *type)
6319 type = ada_check_typedef (type);
6321 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_STRUCT)
6324 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
6325 if (ada_is_parent_field (type, i))
6327 struct type *parent_type = TYPE_FIELD_TYPE (type, i);
6329 /* If the _parent field is a pointer, then dereference it. */
6330 if (TYPE_CODE (parent_type) == TYPE_CODE_PTR)
6331 parent_type = TYPE_TARGET_TYPE (parent_type);
6332 /* If there is a parallel XVS type, get the actual base type. */
6333 parent_type = ada_get_base_type (parent_type);
6335 return ada_check_typedef (parent_type);
6341 /* True iff field number FIELD_NUM of structure type TYPE contains the
6342 parent-type (inherited) fields of a derived type. Assumes TYPE is
6343 a structure type with at least FIELD_NUM+1 fields. */
6346 ada_is_parent_field (struct type *type, int field_num)
6348 const char *name = TYPE_FIELD_NAME (ada_check_typedef (type), field_num);
6350 return (name != NULL
6351 && (strncmp (name, "PARENT", 6) == 0
6352 || strncmp (name, "_parent", 7) == 0));
6355 /* True iff field number FIELD_NUM of structure type TYPE is a
6356 transparent wrapper field (which should be silently traversed when doing
6357 field selection and flattened when printing). Assumes TYPE is a
6358 structure type with at least FIELD_NUM+1 fields. Such fields are always
6362 ada_is_wrapper_field (struct type *type, int field_num)
6364 const char *name = TYPE_FIELD_NAME (type, field_num);
6366 return (name != NULL
6367 && (strncmp (name, "PARENT", 6) == 0
6368 || strcmp (name, "REP") == 0
6369 || strncmp (name, "_parent", 7) == 0
6370 || name[0] == 'S' || name[0] == 'R' || name[0] == 'O'));
6373 /* True iff field number FIELD_NUM of structure or union type TYPE
6374 is a variant wrapper. Assumes TYPE is a structure type with at least
6375 FIELD_NUM+1 fields. */
6378 ada_is_variant_part (struct type *type, int field_num)
6380 struct type *field_type = TYPE_FIELD_TYPE (type, field_num);
6382 return (TYPE_CODE (field_type) == TYPE_CODE_UNION
6383 || (is_dynamic_field (type, field_num)
6384 && (TYPE_CODE (TYPE_TARGET_TYPE (field_type))
6385 == TYPE_CODE_UNION)));
6388 /* Assuming that VAR_TYPE is a variant wrapper (type of the variant part)
6389 whose discriminants are contained in the record type OUTER_TYPE,
6390 returns the type of the controlling discriminant for the variant.
6391 May return NULL if the type could not be found. */
6394 ada_variant_discrim_type (struct type *var_type, struct type *outer_type)
6396 char *name = ada_variant_discrim_name (var_type);
6398 return ada_lookup_struct_elt_type (outer_type, name, 1, 1, NULL);
6401 /* Assuming that TYPE is the type of a variant wrapper, and FIELD_NUM is a
6402 valid field number within it, returns 1 iff field FIELD_NUM of TYPE
6403 represents a 'when others' clause; otherwise 0. */
6406 ada_is_others_clause (struct type *type, int field_num)
6408 const char *name = TYPE_FIELD_NAME (type, field_num);
6410 return (name != NULL && name[0] == 'O');
6413 /* Assuming that TYPE0 is the type of the variant part of a record,
6414 returns the name of the discriminant controlling the variant.
6415 The value is valid until the next call to ada_variant_discrim_name. */
6418 ada_variant_discrim_name (struct type *type0)
6420 static char *result = NULL;
6421 static size_t result_len = 0;
6424 const char *discrim_end;
6425 const char *discrim_start;
6427 if (TYPE_CODE (type0) == TYPE_CODE_PTR)
6428 type = TYPE_TARGET_TYPE (type0);
6432 name = ada_type_name (type);
6434 if (name == NULL || name[0] == '\000')
6437 for (discrim_end = name + strlen (name) - 6; discrim_end != name;
6440 if (strncmp (discrim_end, "___XVN", 6) == 0)
6443 if (discrim_end == name)
6446 for (discrim_start = discrim_end; discrim_start != name + 3;
6449 if (discrim_start == name + 1)
6451 if ((discrim_start > name + 3
6452 && strncmp (discrim_start - 3, "___", 3) == 0)
6453 || discrim_start[-1] == '.')
6457 GROW_VECT (result, result_len, discrim_end - discrim_start + 1);
6458 strncpy (result, discrim_start, discrim_end - discrim_start);
6459 result[discrim_end - discrim_start] = '\0';
6463 /* Scan STR for a subtype-encoded number, beginning at position K.
6464 Put the position of the character just past the number scanned in
6465 *NEW_K, if NEW_K!=NULL. Put the scanned number in *R, if R!=NULL.
6466 Return 1 if there was a valid number at the given position, and 0
6467 otherwise. A "subtype-encoded" number consists of the absolute value
6468 in decimal, followed by the letter 'm' to indicate a negative number.
6469 Assumes 0m does not occur. */
6472 ada_scan_number (const char str[], int k, LONGEST * R, int *new_k)
6476 if (!isdigit (str[k]))
6479 /* Do it the hard way so as not to make any assumption about
6480 the relationship of unsigned long (%lu scan format code) and
6483 while (isdigit (str[k]))
6485 RU = RU * 10 + (str[k] - '0');
6492 *R = (-(LONGEST) (RU - 1)) - 1;
6498 /* NOTE on the above: Technically, C does not say what the results of
6499 - (LONGEST) RU or (LONGEST) -RU are for RU == largest positive
6500 number representable as a LONGEST (although either would probably work
6501 in most implementations). When RU>0, the locution in the then branch
6502 above is always equivalent to the negative of RU. */
6509 /* Assuming that TYPE is a variant part wrapper type (a VARIANTS field),
6510 and FIELD_NUM is a valid field number within it, returns 1 iff VAL is
6511 in the range encoded by field FIELD_NUM of TYPE; otherwise 0. */
6514 ada_in_variant (LONGEST val, struct type *type, int field_num)
6516 const char *name = TYPE_FIELD_NAME (type, field_num);
6530 if (!ada_scan_number (name, p + 1, &W, &p))
6540 if (!ada_scan_number (name, p + 1, &L, &p)
6541 || name[p] != 'T' || !ada_scan_number (name, p + 1, &U, &p))
6543 if (val >= L && val <= U)
6555 /* FIXME: Lots of redundancy below. Try to consolidate. */
6557 /* Given a value ARG1 (offset by OFFSET bytes) of a struct or union type
6558 ARG_TYPE, extract and return the value of one of its (non-static)
6559 fields. FIELDNO says which field. Differs from value_primitive_field
6560 only in that it can handle packed values of arbitrary type. */
6562 static struct value *
6563 ada_value_primitive_field (struct value *arg1, int offset, int fieldno,
6564 struct type *arg_type)
6568 arg_type = ada_check_typedef (arg_type);
6569 type = TYPE_FIELD_TYPE (arg_type, fieldno);
6571 /* Handle packed fields. */
6573 if (TYPE_FIELD_BITSIZE (arg_type, fieldno) != 0)
6575 int bit_pos = TYPE_FIELD_BITPOS (arg_type, fieldno);
6576 int bit_size = TYPE_FIELD_BITSIZE (arg_type, fieldno);
6578 return ada_value_primitive_packed_val (arg1, value_contents (arg1),
6579 offset + bit_pos / 8,
6580 bit_pos % 8, bit_size, type);
6583 return value_primitive_field (arg1, offset, fieldno, arg_type);
6586 /* Find field with name NAME in object of type TYPE. If found,
6587 set the following for each argument that is non-null:
6588 - *FIELD_TYPE_P to the field's type;
6589 - *BYTE_OFFSET_P to OFFSET + the byte offset of the field within
6590 an object of that type;
6591 - *BIT_OFFSET_P to the bit offset modulo byte size of the field;
6592 - *BIT_SIZE_P to its size in bits if the field is packed, and
6594 If INDEX_P is non-null, increment *INDEX_P by the number of source-visible
6595 fields up to but not including the desired field, or by the total
6596 number of fields if not found. A NULL value of NAME never
6597 matches; the function just counts visible fields in this case.
6599 Returns 1 if found, 0 otherwise. */
6602 find_struct_field (const char *name, struct type *type, int offset,
6603 struct type **field_type_p,
6604 int *byte_offset_p, int *bit_offset_p, int *bit_size_p,
6609 type = ada_check_typedef (type);
6611 if (field_type_p != NULL)
6612 *field_type_p = NULL;
6613 if (byte_offset_p != NULL)
6615 if (bit_offset_p != NULL)
6617 if (bit_size_p != NULL)
6620 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
6622 int bit_pos = TYPE_FIELD_BITPOS (type, i);
6623 int fld_offset = offset + bit_pos / 8;
6624 const char *t_field_name = TYPE_FIELD_NAME (type, i);
6626 if (t_field_name == NULL)
6629 else if (name != NULL && field_name_match (t_field_name, name))
6631 int bit_size = TYPE_FIELD_BITSIZE (type, i);
6633 if (field_type_p != NULL)
6634 *field_type_p = TYPE_FIELD_TYPE (type, i);
6635 if (byte_offset_p != NULL)
6636 *byte_offset_p = fld_offset;
6637 if (bit_offset_p != NULL)
6638 *bit_offset_p = bit_pos % 8;
6639 if (bit_size_p != NULL)
6640 *bit_size_p = bit_size;
6643 else if (ada_is_wrapper_field (type, i))
6645 if (find_struct_field (name, TYPE_FIELD_TYPE (type, i), fld_offset,
6646 field_type_p, byte_offset_p, bit_offset_p,
6647 bit_size_p, index_p))
6650 else if (ada_is_variant_part (type, i))
6652 /* PNH: Wait. Do we ever execute this section, or is ARG always of
6655 struct type *field_type
6656 = ada_check_typedef (TYPE_FIELD_TYPE (type, i));
6658 for (j = 0; j < TYPE_NFIELDS (field_type); j += 1)
6660 if (find_struct_field (name, TYPE_FIELD_TYPE (field_type, j),
6662 + TYPE_FIELD_BITPOS (field_type, j) / 8,
6663 field_type_p, byte_offset_p,
6664 bit_offset_p, bit_size_p, index_p))
6668 else if (index_p != NULL)
6674 /* Number of user-visible fields in record type TYPE. */
6677 num_visible_fields (struct type *type)
6682 find_struct_field (NULL, type, 0, NULL, NULL, NULL, NULL, &n);
6686 /* Look for a field NAME in ARG. Adjust the address of ARG by OFFSET bytes,
6687 and search in it assuming it has (class) type TYPE.
6688 If found, return value, else return NULL.
6690 Searches recursively through wrapper fields (e.g., '_parent'). */
6692 static struct value *
6693 ada_search_struct_field (char *name, struct value *arg, int offset,
6698 type = ada_check_typedef (type);
6699 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
6701 const char *t_field_name = TYPE_FIELD_NAME (type, i);
6703 if (t_field_name == NULL)
6706 else if (field_name_match (t_field_name, name))
6707 return ada_value_primitive_field (arg, offset, i, type);
6709 else if (ada_is_wrapper_field (type, i))
6711 struct value *v = /* Do not let indent join lines here. */
6712 ada_search_struct_field (name, arg,
6713 offset + TYPE_FIELD_BITPOS (type, i) / 8,
6714 TYPE_FIELD_TYPE (type, i));
6720 else if (ada_is_variant_part (type, i))
6722 /* PNH: Do we ever get here? See find_struct_field. */
6724 struct type *field_type = ada_check_typedef (TYPE_FIELD_TYPE (type,
6726 int var_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8;
6728 for (j = 0; j < TYPE_NFIELDS (field_type); j += 1)
6730 struct value *v = ada_search_struct_field /* Force line
6733 var_offset + TYPE_FIELD_BITPOS (field_type, j) / 8,
6734 TYPE_FIELD_TYPE (field_type, j));
6744 static struct value *ada_index_struct_field_1 (int *, struct value *,
6745 int, struct type *);
6748 /* Return field #INDEX in ARG, where the index is that returned by
6749 * find_struct_field through its INDEX_P argument. Adjust the address
6750 * of ARG by OFFSET bytes, and search in it assuming it has (class) type TYPE.
6751 * If found, return value, else return NULL. */
6753 static struct value *
6754 ada_index_struct_field (int index, struct value *arg, int offset,
6757 return ada_index_struct_field_1 (&index, arg, offset, type);
6761 /* Auxiliary function for ada_index_struct_field. Like
6762 * ada_index_struct_field, but takes index from *INDEX_P and modifies
6765 static struct value *
6766 ada_index_struct_field_1 (int *index_p, struct value *arg, int offset,
6770 type = ada_check_typedef (type);
6772 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
6774 if (TYPE_FIELD_NAME (type, i) == NULL)
6776 else if (ada_is_wrapper_field (type, i))
6778 struct value *v = /* Do not let indent join lines here. */
6779 ada_index_struct_field_1 (index_p, arg,
6780 offset + TYPE_FIELD_BITPOS (type, i) / 8,
6781 TYPE_FIELD_TYPE (type, i));
6787 else if (ada_is_variant_part (type, i))
6789 /* PNH: Do we ever get here? See ada_search_struct_field,
6790 find_struct_field. */
6791 error (_("Cannot assign this kind of variant record"));
6793 else if (*index_p == 0)
6794 return ada_value_primitive_field (arg, offset, i, type);
6801 /* Given ARG, a value of type (pointer or reference to a)*
6802 structure/union, extract the component named NAME from the ultimate
6803 target structure/union and return it as a value with its
6806 The routine searches for NAME among all members of the structure itself
6807 and (recursively) among all members of any wrapper members
6810 If NO_ERR, then simply return NULL in case of error, rather than
6814 ada_value_struct_elt (struct value *arg, char *name, int no_err)
6816 struct type *t, *t1;
6820 t1 = t = ada_check_typedef (value_type (arg));
6821 if (TYPE_CODE (t) == TYPE_CODE_REF)
6823 t1 = TYPE_TARGET_TYPE (t);
6826 t1 = ada_check_typedef (t1);
6827 if (TYPE_CODE (t1) == TYPE_CODE_PTR)
6829 arg = coerce_ref (arg);
6834 while (TYPE_CODE (t) == TYPE_CODE_PTR)
6836 t1 = TYPE_TARGET_TYPE (t);
6839 t1 = ada_check_typedef (t1);
6840 if (TYPE_CODE (t1) == TYPE_CODE_PTR)
6842 arg = value_ind (arg);
6849 if (TYPE_CODE (t1) != TYPE_CODE_STRUCT && TYPE_CODE (t1) != TYPE_CODE_UNION)
6853 v = ada_search_struct_field (name, arg, 0, t);
6856 int bit_offset, bit_size, byte_offset;
6857 struct type *field_type;
6860 if (TYPE_CODE (t) == TYPE_CODE_PTR)
6861 address = value_address (ada_value_ind (arg));
6863 address = value_address (ada_coerce_ref (arg));
6865 t1 = ada_to_fixed_type (ada_get_base_type (t1), NULL, address, NULL, 1);
6866 if (find_struct_field (name, t1, 0,
6867 &field_type, &byte_offset, &bit_offset,
6872 if (TYPE_CODE (t) == TYPE_CODE_REF)
6873 arg = ada_coerce_ref (arg);
6875 arg = ada_value_ind (arg);
6876 v = ada_value_primitive_packed_val (arg, NULL, byte_offset,
6877 bit_offset, bit_size,
6881 v = value_at_lazy (field_type, address + byte_offset);
6885 if (v != NULL || no_err)
6888 error (_("There is no member named %s."), name);
6894 error (_("Attempt to extract a component of "
6895 "a value that is not a record."));
6898 /* Given a type TYPE, look up the type of the component of type named NAME.
6899 If DISPP is non-null, add its byte displacement from the beginning of a
6900 structure (pointed to by a value) of type TYPE to *DISPP (does not
6901 work for packed fields).
6903 Matches any field whose name has NAME as a prefix, possibly
6906 TYPE can be either a struct or union. If REFOK, TYPE may also
6907 be a (pointer or reference)+ to a struct or union, and the
6908 ultimate target type will be searched.
6910 Looks recursively into variant clauses and parent types.
6912 If NOERR is nonzero, return NULL if NAME is not suitably defined or
6913 TYPE is not a type of the right kind. */
6915 static struct type *
6916 ada_lookup_struct_elt_type (struct type *type, char *name, int refok,
6917 int noerr, int *dispp)
6924 if (refok && type != NULL)
6927 type = ada_check_typedef (type);
6928 if (TYPE_CODE (type) != TYPE_CODE_PTR
6929 && TYPE_CODE (type) != TYPE_CODE_REF)
6931 type = TYPE_TARGET_TYPE (type);
6935 || (TYPE_CODE (type) != TYPE_CODE_STRUCT
6936 && TYPE_CODE (type) != TYPE_CODE_UNION))
6942 target_terminal_ours ();
6943 gdb_flush (gdb_stdout);
6945 error (_("Type (null) is not a structure or union type"));
6948 /* XXX: type_sprint */
6949 fprintf_unfiltered (gdb_stderr, _("Type "));
6950 type_print (type, "", gdb_stderr, -1);
6951 error (_(" is not a structure or union type"));
6956 type = to_static_fixed_type (type);
6958 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
6960 const char *t_field_name = TYPE_FIELD_NAME (type, i);
6964 if (t_field_name == NULL)
6967 else if (field_name_match (t_field_name, name))
6970 *dispp += TYPE_FIELD_BITPOS (type, i) / 8;
6971 return ada_check_typedef (TYPE_FIELD_TYPE (type, i));
6974 else if (ada_is_wrapper_field (type, i))
6977 t = ada_lookup_struct_elt_type (TYPE_FIELD_TYPE (type, i), name,
6982 *dispp += disp + TYPE_FIELD_BITPOS (type, i) / 8;
6987 else if (ada_is_variant_part (type, i))
6990 struct type *field_type = ada_check_typedef (TYPE_FIELD_TYPE (type,
6993 for (j = TYPE_NFIELDS (field_type) - 1; j >= 0; j -= 1)
6995 /* FIXME pnh 2008/01/26: We check for a field that is
6996 NOT wrapped in a struct, since the compiler sometimes
6997 generates these for unchecked variant types. Revisit
6998 if the compiler changes this practice. */
6999 const char *v_field_name = TYPE_FIELD_NAME (field_type, j);
7001 if (v_field_name != NULL
7002 && field_name_match (v_field_name, name))
7003 t = ada_check_typedef (TYPE_FIELD_TYPE (field_type, j));
7005 t = ada_lookup_struct_elt_type (TYPE_FIELD_TYPE (field_type,
7012 *dispp += disp + TYPE_FIELD_BITPOS (type, i) / 8;
7023 target_terminal_ours ();
7024 gdb_flush (gdb_stdout);
7027 /* XXX: type_sprint */
7028 fprintf_unfiltered (gdb_stderr, _("Type "));
7029 type_print (type, "", gdb_stderr, -1);
7030 error (_(" has no component named <null>"));
7034 /* XXX: type_sprint */
7035 fprintf_unfiltered (gdb_stderr, _("Type "));
7036 type_print (type, "", gdb_stderr, -1);
7037 error (_(" has no component named %s"), name);
7044 /* Assuming that VAR_TYPE is the type of a variant part of a record (a union),
7045 within a value of type OUTER_TYPE, return true iff VAR_TYPE
7046 represents an unchecked union (that is, the variant part of a
7047 record that is named in an Unchecked_Union pragma). */
7050 is_unchecked_variant (struct type *var_type, struct type *outer_type)
7052 char *discrim_name = ada_variant_discrim_name (var_type);
7054 return (ada_lookup_struct_elt_type (outer_type, discrim_name, 0, 1, NULL)
7059 /* Assuming that VAR_TYPE is the type of a variant part of a record (a union),
7060 within a value of type OUTER_TYPE that is stored in GDB at
7061 OUTER_VALADDR, determine which variant clause (field number in VAR_TYPE,
7062 numbering from 0) is applicable. Returns -1 if none are. */
7065 ada_which_variant_applies (struct type *var_type, struct type *outer_type,
7066 const gdb_byte *outer_valaddr)
7070 char *discrim_name = ada_variant_discrim_name (var_type);
7071 struct value *outer;
7072 struct value *discrim;
7073 LONGEST discrim_val;
7075 outer = value_from_contents_and_address (outer_type, outer_valaddr, 0);
7076 discrim = ada_value_struct_elt (outer, discrim_name, 1);
7077 if (discrim == NULL)
7079 discrim_val = value_as_long (discrim);
7082 for (i = 0; i < TYPE_NFIELDS (var_type); i += 1)
7084 if (ada_is_others_clause (var_type, i))
7086 else if (ada_in_variant (discrim_val, var_type, i))
7090 return others_clause;
7095 /* Dynamic-Sized Records */
7097 /* Strategy: The type ostensibly attached to a value with dynamic size
7098 (i.e., a size that is not statically recorded in the debugging
7099 data) does not accurately reflect the size or layout of the value.
7100 Our strategy is to convert these values to values with accurate,
7101 conventional types that are constructed on the fly. */
7103 /* There is a subtle and tricky problem here. In general, we cannot
7104 determine the size of dynamic records without its data. However,
7105 the 'struct value' data structure, which GDB uses to represent
7106 quantities in the inferior process (the target), requires the size
7107 of the type at the time of its allocation in order to reserve space
7108 for GDB's internal copy of the data. That's why the
7109 'to_fixed_xxx_type' routines take (target) addresses as parameters,
7110 rather than struct value*s.
7112 However, GDB's internal history variables ($1, $2, etc.) are
7113 struct value*s containing internal copies of the data that are not, in
7114 general, the same as the data at their corresponding addresses in
7115 the target. Fortunately, the types we give to these values are all
7116 conventional, fixed-size types (as per the strategy described
7117 above), so that we don't usually have to perform the
7118 'to_fixed_xxx_type' conversions to look at their values.
7119 Unfortunately, there is one exception: if one of the internal
7120 history variables is an array whose elements are unconstrained
7121 records, then we will need to create distinct fixed types for each
7122 element selected. */
7124 /* The upshot of all of this is that many routines take a (type, host
7125 address, target address) triple as arguments to represent a value.
7126 The host address, if non-null, is supposed to contain an internal
7127 copy of the relevant data; otherwise, the program is to consult the
7128 target at the target address. */
7130 /* Assuming that VAL0 represents a pointer value, the result of
7131 dereferencing it. Differs from value_ind in its treatment of
7132 dynamic-sized types. */
7135 ada_value_ind (struct value *val0)
7137 struct value *val = value_ind (val0);
7139 if (ada_is_tagged_type (value_type (val), 0))
7140 val = ada_tag_value_at_base_address (val);
7142 return ada_to_fixed_value (val);
7145 /* The value resulting from dereferencing any "reference to"
7146 qualifiers on VAL0. */
7148 static struct value *
7149 ada_coerce_ref (struct value *val0)
7151 if (TYPE_CODE (value_type (val0)) == TYPE_CODE_REF)
7153 struct value *val = val0;
7155 val = coerce_ref (val);
7157 if (ada_is_tagged_type (value_type (val), 0))
7158 val = ada_tag_value_at_base_address (val);
7160 return ada_to_fixed_value (val);
7166 /* Return OFF rounded upward if necessary to a multiple of
7167 ALIGNMENT (a power of 2). */
7170 align_value (unsigned int off, unsigned int alignment)
7172 return (off + alignment - 1) & ~(alignment - 1);
7175 /* Return the bit alignment required for field #F of template type TYPE. */
7178 field_alignment (struct type *type, int f)
7180 const char *name = TYPE_FIELD_NAME (type, f);
7184 /* The field name should never be null, unless the debugging information
7185 is somehow malformed. In this case, we assume the field does not
7186 require any alignment. */
7190 len = strlen (name);
7192 if (!isdigit (name[len - 1]))
7195 if (isdigit (name[len - 2]))
7196 align_offset = len - 2;
7198 align_offset = len - 1;
7200 if (align_offset < 7 || strncmp ("___XV", name + align_offset - 6, 5) != 0)
7201 return TARGET_CHAR_BIT;
7203 return atoi (name + align_offset) * TARGET_CHAR_BIT;
7206 /* Find a typedef or tag symbol named NAME. Ignores ambiguity. */
7208 static struct symbol *
7209 ada_find_any_type_symbol (const char *name)
7213 sym = standard_lookup (name, get_selected_block (NULL), VAR_DOMAIN);
7214 if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
7217 sym = standard_lookup (name, NULL, STRUCT_DOMAIN);
7221 /* Find a type named NAME. Ignores ambiguity. This routine will look
7222 solely for types defined by debug info, it will not search the GDB
7225 static struct type *
7226 ada_find_any_type (const char *name)
7228 struct symbol *sym = ada_find_any_type_symbol (name);
7231 return SYMBOL_TYPE (sym);
7236 /* Given NAME_SYM and an associated BLOCK, find a "renaming" symbol
7237 associated with NAME_SYM's name. NAME_SYM may itself be a renaming
7238 symbol, in which case it is returned. Otherwise, this looks for
7239 symbols whose name is that of NAME_SYM suffixed with "___XR".
7240 Return symbol if found, and NULL otherwise. */
7243 ada_find_renaming_symbol (struct symbol *name_sym, const struct block *block)
7245 const char *name = SYMBOL_LINKAGE_NAME (name_sym);
7248 if (strstr (name, "___XR") != NULL)
7251 sym = find_old_style_renaming_symbol (name, block);
7256 /* Not right yet. FIXME pnh 7/20/2007. */
7257 sym = ada_find_any_type_symbol (name);
7258 if (sym != NULL && strstr (SYMBOL_LINKAGE_NAME (sym), "___XR") != NULL)
7264 static struct symbol *
7265 find_old_style_renaming_symbol (const char *name, const struct block *block)
7267 const struct symbol *function_sym = block_linkage_function (block);
7270 if (function_sym != NULL)
7272 /* If the symbol is defined inside a function, NAME is not fully
7273 qualified. This means we need to prepend the function name
7274 as well as adding the ``___XR'' suffix to build the name of
7275 the associated renaming symbol. */
7276 const char *function_name = SYMBOL_LINKAGE_NAME (function_sym);
7277 /* Function names sometimes contain suffixes used
7278 for instance to qualify nested subprograms. When building
7279 the XR type name, we need to make sure that this suffix is
7280 not included. So do not include any suffix in the function
7281 name length below. */
7282 int function_name_len = ada_name_prefix_len (function_name);
7283 const int rename_len = function_name_len + 2 /* "__" */
7284 + strlen (name) + 6 /* "___XR\0" */ ;
7286 /* Strip the suffix if necessary. */
7287 ada_remove_trailing_digits (function_name, &function_name_len);
7288 ada_remove_po_subprogram_suffix (function_name, &function_name_len);
7289 ada_remove_Xbn_suffix (function_name, &function_name_len);
7291 /* Library-level functions are a special case, as GNAT adds
7292 a ``_ada_'' prefix to the function name to avoid namespace
7293 pollution. However, the renaming symbols themselves do not
7294 have this prefix, so we need to skip this prefix if present. */
7295 if (function_name_len > 5 /* "_ada_" */
7296 && strstr (function_name, "_ada_") == function_name)
7299 function_name_len -= 5;
7302 rename = (char *) alloca (rename_len * sizeof (char));
7303 strncpy (rename, function_name, function_name_len);
7304 xsnprintf (rename + function_name_len, rename_len - function_name_len,
7309 const int rename_len = strlen (name) + 6;
7311 rename = (char *) alloca (rename_len * sizeof (char));
7312 xsnprintf (rename, rename_len * sizeof (char), "%s___XR", name);
7315 return ada_find_any_type_symbol (rename);
7318 /* Because of GNAT encoding conventions, several GDB symbols may match a
7319 given type name. If the type denoted by TYPE0 is to be preferred to
7320 that of TYPE1 for purposes of type printing, return non-zero;
7321 otherwise return 0. */
7324 ada_prefer_type (struct type *type0, struct type *type1)
7328 else if (type0 == NULL)
7330 else if (TYPE_CODE (type1) == TYPE_CODE_VOID)
7332 else if (TYPE_CODE (type0) == TYPE_CODE_VOID)
7334 else if (TYPE_NAME (type1) == NULL && TYPE_NAME (type0) != NULL)
7336 else if (ada_is_constrained_packed_array_type (type0))
7338 else if (ada_is_array_descriptor_type (type0)
7339 && !ada_is_array_descriptor_type (type1))
7343 const char *type0_name = type_name_no_tag (type0);
7344 const char *type1_name = type_name_no_tag (type1);
7346 if (type0_name != NULL && strstr (type0_name, "___XR") != NULL
7347 && (type1_name == NULL || strstr (type1_name, "___XR") == NULL))
7353 /* The name of TYPE, which is either its TYPE_NAME, or, if that is
7354 null, its TYPE_TAG_NAME. Null if TYPE is null. */
7357 ada_type_name (struct type *type)
7361 else if (TYPE_NAME (type) != NULL)
7362 return TYPE_NAME (type);
7364 return TYPE_TAG_NAME (type);
7367 /* Search the list of "descriptive" types associated to TYPE for a type
7368 whose name is NAME. */
7370 static struct type *
7371 find_parallel_type_by_descriptive_type (struct type *type, const char *name)
7373 struct type *result;
7375 /* If there no descriptive-type info, then there is no parallel type
7377 if (!HAVE_GNAT_AUX_INFO (type))
7380 result = TYPE_DESCRIPTIVE_TYPE (type);
7381 while (result != NULL)
7383 const char *result_name = ada_type_name (result);
7385 if (result_name == NULL)
7387 warning (_("unexpected null name on descriptive type"));
7391 /* If the names match, stop. */
7392 if (strcmp (result_name, name) == 0)
7395 /* Otherwise, look at the next item on the list, if any. */
7396 if (HAVE_GNAT_AUX_INFO (result))
7397 result = TYPE_DESCRIPTIVE_TYPE (result);
7402 /* If we didn't find a match, see whether this is a packed array. With
7403 older compilers, the descriptive type information is either absent or
7404 irrelevant when it comes to packed arrays so the above lookup fails.
7405 Fall back to using a parallel lookup by name in this case. */
7406 if (result == NULL && ada_is_constrained_packed_array_type (type))
7407 return ada_find_any_type (name);
7412 /* Find a parallel type to TYPE with the specified NAME, using the
7413 descriptive type taken from the debugging information, if available,
7414 and otherwise using the (slower) name-based method. */
7416 static struct type *
7417 ada_find_parallel_type_with_name (struct type *type, const char *name)
7419 struct type *result = NULL;
7421 if (HAVE_GNAT_AUX_INFO (type))
7422 result = find_parallel_type_by_descriptive_type (type, name);
7424 result = ada_find_any_type (name);
7429 /* Same as above, but specify the name of the parallel type by appending
7430 SUFFIX to the name of TYPE. */
7433 ada_find_parallel_type (struct type *type, const char *suffix)
7436 const char *typename = ada_type_name (type);
7439 if (typename == NULL)
7442 len = strlen (typename);
7444 name = (char *) alloca (len + strlen (suffix) + 1);
7446 strcpy (name, typename);
7447 strcpy (name + len, suffix);
7449 return ada_find_parallel_type_with_name (type, name);
7452 /* If TYPE is a variable-size record type, return the corresponding template
7453 type describing its fields. Otherwise, return NULL. */
7455 static struct type *
7456 dynamic_template_type (struct type *type)
7458 type = ada_check_typedef (type);
7460 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_STRUCT
7461 || ada_type_name (type) == NULL)
7465 int len = strlen (ada_type_name (type));
7467 if (len > 6 && strcmp (ada_type_name (type) + len - 6, "___XVE") == 0)
7470 return ada_find_parallel_type (type, "___XVE");
7474 /* Assuming that TEMPL_TYPE is a union or struct type, returns
7475 non-zero iff field FIELD_NUM of TEMPL_TYPE has dynamic size. */
7478 is_dynamic_field (struct type *templ_type, int field_num)
7480 const char *name = TYPE_FIELD_NAME (templ_type, field_num);
7483 && TYPE_CODE (TYPE_FIELD_TYPE (templ_type, field_num)) == TYPE_CODE_PTR
7484 && strstr (name, "___XVL") != NULL;
7487 /* The index of the variant field of TYPE, or -1 if TYPE does not
7488 represent a variant record type. */
7491 variant_field_index (struct type *type)
7495 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_STRUCT)
7498 for (f = 0; f < TYPE_NFIELDS (type); f += 1)
7500 if (ada_is_variant_part (type, f))
7506 /* A record type with no fields. */
7508 static struct type *
7509 empty_record (struct type *template)
7511 struct type *type = alloc_type_copy (template);
7513 TYPE_CODE (type) = TYPE_CODE_STRUCT;
7514 TYPE_NFIELDS (type) = 0;
7515 TYPE_FIELDS (type) = NULL;
7516 INIT_CPLUS_SPECIFIC (type);
7517 TYPE_NAME (type) = "<empty>";
7518 TYPE_TAG_NAME (type) = NULL;
7519 TYPE_LENGTH (type) = 0;
7523 /* An ordinary record type (with fixed-length fields) that describes
7524 the value of type TYPE at VALADDR or ADDRESS (see comments at
7525 the beginning of this section) VAL according to GNAT conventions.
7526 DVAL0 should describe the (portion of a) record that contains any
7527 necessary discriminants. It should be NULL if value_type (VAL) is
7528 an outer-level type (i.e., as opposed to a branch of a variant.) A
7529 variant field (unless unchecked) is replaced by a particular branch
7532 If not KEEP_DYNAMIC_FIELDS, then all fields whose position or
7533 length are not statically known are discarded. As a consequence,
7534 VALADDR, ADDRESS and DVAL0 are ignored.
7536 NOTE: Limitations: For now, we assume that dynamic fields and
7537 variants occupy whole numbers of bytes. However, they need not be
7541 ada_template_to_fixed_record_type_1 (struct type *type,
7542 const gdb_byte *valaddr,
7543 CORE_ADDR address, struct value *dval0,
7544 int keep_dynamic_fields)
7546 struct value *mark = value_mark ();
7549 int nfields, bit_len;
7555 /* Compute the number of fields in this record type that are going
7556 to be processed: unless keep_dynamic_fields, this includes only
7557 fields whose position and length are static will be processed. */
7558 if (keep_dynamic_fields)
7559 nfields = TYPE_NFIELDS (type);
7563 while (nfields < TYPE_NFIELDS (type)
7564 && !ada_is_variant_part (type, nfields)
7565 && !is_dynamic_field (type, nfields))
7569 rtype = alloc_type_copy (type);
7570 TYPE_CODE (rtype) = TYPE_CODE_STRUCT;
7571 INIT_CPLUS_SPECIFIC (rtype);
7572 TYPE_NFIELDS (rtype) = nfields;
7573 TYPE_FIELDS (rtype) = (struct field *)
7574 TYPE_ALLOC (rtype, nfields * sizeof (struct field));
7575 memset (TYPE_FIELDS (rtype), 0, sizeof (struct field) * nfields);
7576 TYPE_NAME (rtype) = ada_type_name (type);
7577 TYPE_TAG_NAME (rtype) = NULL;
7578 TYPE_FIXED_INSTANCE (rtype) = 1;
7584 for (f = 0; f < nfields; f += 1)
7586 off = align_value (off, field_alignment (type, f))
7587 + TYPE_FIELD_BITPOS (type, f);
7588 SET_FIELD_BITPOS (TYPE_FIELD (rtype, f), off);
7589 TYPE_FIELD_BITSIZE (rtype, f) = 0;
7591 if (ada_is_variant_part (type, f))
7596 else if (is_dynamic_field (type, f))
7598 const gdb_byte *field_valaddr = valaddr;
7599 CORE_ADDR field_address = address;
7600 struct type *field_type =
7601 TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, f));
7605 /* rtype's length is computed based on the run-time
7606 value of discriminants. If the discriminants are not
7607 initialized, the type size may be completely bogus and
7608 GDB may fail to allocate a value for it. So check the
7609 size first before creating the value. */
7611 dval = value_from_contents_and_address (rtype, valaddr, address);
7616 /* If the type referenced by this field is an aligner type, we need
7617 to unwrap that aligner type, because its size might not be set.
7618 Keeping the aligner type would cause us to compute the wrong
7619 size for this field, impacting the offset of the all the fields
7620 that follow this one. */
7621 if (ada_is_aligner_type (field_type))
7623 long field_offset = TYPE_FIELD_BITPOS (field_type, f);
7625 field_valaddr = cond_offset_host (field_valaddr, field_offset);
7626 field_address = cond_offset_target (field_address, field_offset);
7627 field_type = ada_aligned_type (field_type);
7630 field_valaddr = cond_offset_host (field_valaddr,
7631 off / TARGET_CHAR_BIT);
7632 field_address = cond_offset_target (field_address,
7633 off / TARGET_CHAR_BIT);
7635 /* Get the fixed type of the field. Note that, in this case,
7636 we do not want to get the real type out of the tag: if
7637 the current field is the parent part of a tagged record,
7638 we will get the tag of the object. Clearly wrong: the real
7639 type of the parent is not the real type of the child. We
7640 would end up in an infinite loop. */
7641 field_type = ada_get_base_type (field_type);
7642 field_type = ada_to_fixed_type (field_type, field_valaddr,
7643 field_address, dval, 0);
7644 /* If the field size is already larger than the maximum
7645 object size, then the record itself will necessarily
7646 be larger than the maximum object size. We need to make
7647 this check now, because the size might be so ridiculously
7648 large (due to an uninitialized variable in the inferior)
7649 that it would cause an overflow when adding it to the
7651 check_size (field_type);
7653 TYPE_FIELD_TYPE (rtype, f) = field_type;
7654 TYPE_FIELD_NAME (rtype, f) = TYPE_FIELD_NAME (type, f);
7655 /* The multiplication can potentially overflow. But because
7656 the field length has been size-checked just above, and
7657 assuming that the maximum size is a reasonable value,
7658 an overflow should not happen in practice. So rather than
7659 adding overflow recovery code to this already complex code,
7660 we just assume that it's not going to happen. */
7662 TYPE_LENGTH (TYPE_FIELD_TYPE (rtype, f)) * TARGET_CHAR_BIT;
7666 /* Note: If this field's type is a typedef, it is important
7667 to preserve the typedef layer.
7669 Otherwise, we might be transforming a typedef to a fat
7670 pointer (encoding a pointer to an unconstrained array),
7671 into a basic fat pointer (encoding an unconstrained
7672 array). As both types are implemented using the same
7673 structure, the typedef is the only clue which allows us
7674 to distinguish between the two options. Stripping it
7675 would prevent us from printing this field appropriately. */
7676 TYPE_FIELD_TYPE (rtype, f) = TYPE_FIELD_TYPE (type, f);
7677 TYPE_FIELD_NAME (rtype, f) = TYPE_FIELD_NAME (type, f);
7678 if (TYPE_FIELD_BITSIZE (type, f) > 0)
7680 TYPE_FIELD_BITSIZE (rtype, f) = TYPE_FIELD_BITSIZE (type, f);
7683 struct type *field_type = TYPE_FIELD_TYPE (type, f);
7685 /* We need to be careful of typedefs when computing
7686 the length of our field. If this is a typedef,
7687 get the length of the target type, not the length
7689 if (TYPE_CODE (field_type) == TYPE_CODE_TYPEDEF)
7690 field_type = ada_typedef_target_type (field_type);
7693 TYPE_LENGTH (ada_check_typedef (field_type)) * TARGET_CHAR_BIT;
7696 if (off + fld_bit_len > bit_len)
7697 bit_len = off + fld_bit_len;
7699 TYPE_LENGTH (rtype) =
7700 align_value (bit_len, TARGET_CHAR_BIT) / TARGET_CHAR_BIT;
7703 /* We handle the variant part, if any, at the end because of certain
7704 odd cases in which it is re-ordered so as NOT to be the last field of
7705 the record. This can happen in the presence of representation
7707 if (variant_field >= 0)
7709 struct type *branch_type;
7711 off = TYPE_FIELD_BITPOS (rtype, variant_field);
7714 dval = value_from_contents_and_address (rtype, valaddr, address);
7719 to_fixed_variant_branch_type
7720 (TYPE_FIELD_TYPE (type, variant_field),
7721 cond_offset_host (valaddr, off / TARGET_CHAR_BIT),
7722 cond_offset_target (address, off / TARGET_CHAR_BIT), dval);
7723 if (branch_type == NULL)
7725 for (f = variant_field + 1; f < TYPE_NFIELDS (rtype); f += 1)
7726 TYPE_FIELDS (rtype)[f - 1] = TYPE_FIELDS (rtype)[f];
7727 TYPE_NFIELDS (rtype) -= 1;
7731 TYPE_FIELD_TYPE (rtype, variant_field) = branch_type;
7732 TYPE_FIELD_NAME (rtype, variant_field) = "S";
7734 TYPE_LENGTH (TYPE_FIELD_TYPE (rtype, variant_field)) *
7736 if (off + fld_bit_len > bit_len)
7737 bit_len = off + fld_bit_len;
7738 TYPE_LENGTH (rtype) =
7739 align_value (bit_len, TARGET_CHAR_BIT) / TARGET_CHAR_BIT;
7743 /* According to exp_dbug.ads, the size of TYPE for variable-size records
7744 should contain the alignment of that record, which should be a strictly
7745 positive value. If null or negative, then something is wrong, most
7746 probably in the debug info. In that case, we don't round up the size
7747 of the resulting type. If this record is not part of another structure,
7748 the current RTYPE length might be good enough for our purposes. */
7749 if (TYPE_LENGTH (type) <= 0)
7751 if (TYPE_NAME (rtype))
7752 warning (_("Invalid type size for `%s' detected: %d."),
7753 TYPE_NAME (rtype), TYPE_LENGTH (type));
7755 warning (_("Invalid type size for <unnamed> detected: %d."),
7756 TYPE_LENGTH (type));
7760 TYPE_LENGTH (rtype) = align_value (TYPE_LENGTH (rtype),
7761 TYPE_LENGTH (type));
7764 value_free_to_mark (mark);
7765 if (TYPE_LENGTH (rtype) > varsize_limit)
7766 error (_("record type with dynamic size is larger than varsize-limit"));
7770 /* As for ada_template_to_fixed_record_type_1 with KEEP_DYNAMIC_FIELDS
7773 static struct type *
7774 template_to_fixed_record_type (struct type *type, const gdb_byte *valaddr,
7775 CORE_ADDR address, struct value *dval0)
7777 return ada_template_to_fixed_record_type_1 (type, valaddr,
7781 /* An ordinary record type in which ___XVL-convention fields and
7782 ___XVU- and ___XVN-convention field types in TYPE0 are replaced with
7783 static approximations, containing all possible fields. Uses
7784 no runtime values. Useless for use in values, but that's OK,
7785 since the results are used only for type determinations. Works on both
7786 structs and unions. Representation note: to save space, we memorize
7787 the result of this function in the TYPE_TARGET_TYPE of the
7790 static struct type *
7791 template_to_static_fixed_type (struct type *type0)
7797 if (TYPE_TARGET_TYPE (type0) != NULL)
7798 return TYPE_TARGET_TYPE (type0);
7800 nfields = TYPE_NFIELDS (type0);
7803 for (f = 0; f < nfields; f += 1)
7805 struct type *field_type = ada_check_typedef (TYPE_FIELD_TYPE (type0, f));
7806 struct type *new_type;
7808 if (is_dynamic_field (type0, f))
7809 new_type = to_static_fixed_type (TYPE_TARGET_TYPE (field_type));
7811 new_type = static_unwrap_type (field_type);
7812 if (type == type0 && new_type != field_type)
7814 TYPE_TARGET_TYPE (type0) = type = alloc_type_copy (type0);
7815 TYPE_CODE (type) = TYPE_CODE (type0);
7816 INIT_CPLUS_SPECIFIC (type);
7817 TYPE_NFIELDS (type) = nfields;
7818 TYPE_FIELDS (type) = (struct field *)
7819 TYPE_ALLOC (type, nfields * sizeof (struct field));
7820 memcpy (TYPE_FIELDS (type), TYPE_FIELDS (type0),
7821 sizeof (struct field) * nfields);
7822 TYPE_NAME (type) = ada_type_name (type0);
7823 TYPE_TAG_NAME (type) = NULL;
7824 TYPE_FIXED_INSTANCE (type) = 1;
7825 TYPE_LENGTH (type) = 0;
7827 TYPE_FIELD_TYPE (type, f) = new_type;
7828 TYPE_FIELD_NAME (type, f) = TYPE_FIELD_NAME (type0, f);
7833 /* Given an object of type TYPE whose contents are at VALADDR and
7834 whose address in memory is ADDRESS, returns a revision of TYPE,
7835 which should be a non-dynamic-sized record, in which the variant
7836 part, if any, is replaced with the appropriate branch. Looks
7837 for discriminant values in DVAL0, which can be NULL if the record
7838 contains the necessary discriminant values. */
7840 static struct type *
7841 to_record_with_fixed_variant_part (struct type *type, const gdb_byte *valaddr,
7842 CORE_ADDR address, struct value *dval0)
7844 struct value *mark = value_mark ();
7847 struct type *branch_type;
7848 int nfields = TYPE_NFIELDS (type);
7849 int variant_field = variant_field_index (type);
7851 if (variant_field == -1)
7855 dval = value_from_contents_and_address (type, valaddr, address);
7859 rtype = alloc_type_copy (type);
7860 TYPE_CODE (rtype) = TYPE_CODE_STRUCT;
7861 INIT_CPLUS_SPECIFIC (rtype);
7862 TYPE_NFIELDS (rtype) = nfields;
7863 TYPE_FIELDS (rtype) =
7864 (struct field *) TYPE_ALLOC (rtype, nfields * sizeof (struct field));
7865 memcpy (TYPE_FIELDS (rtype), TYPE_FIELDS (type),
7866 sizeof (struct field) * nfields);
7867 TYPE_NAME (rtype) = ada_type_name (type);
7868 TYPE_TAG_NAME (rtype) = NULL;
7869 TYPE_FIXED_INSTANCE (rtype) = 1;
7870 TYPE_LENGTH (rtype) = TYPE_LENGTH (type);
7872 branch_type = to_fixed_variant_branch_type
7873 (TYPE_FIELD_TYPE (type, variant_field),
7874 cond_offset_host (valaddr,
7875 TYPE_FIELD_BITPOS (type, variant_field)
7877 cond_offset_target (address,
7878 TYPE_FIELD_BITPOS (type, variant_field)
7879 / TARGET_CHAR_BIT), dval);
7880 if (branch_type == NULL)
7884 for (f = variant_field + 1; f < nfields; f += 1)
7885 TYPE_FIELDS (rtype)[f - 1] = TYPE_FIELDS (rtype)[f];
7886 TYPE_NFIELDS (rtype) -= 1;
7890 TYPE_FIELD_TYPE (rtype, variant_field) = branch_type;
7891 TYPE_FIELD_NAME (rtype, variant_field) = "S";
7892 TYPE_FIELD_BITSIZE (rtype, variant_field) = 0;
7893 TYPE_LENGTH (rtype) += TYPE_LENGTH (branch_type);
7895 TYPE_LENGTH (rtype) -= TYPE_LENGTH (TYPE_FIELD_TYPE (type, variant_field));
7897 value_free_to_mark (mark);
7901 /* An ordinary record type (with fixed-length fields) that describes
7902 the value at (TYPE0, VALADDR, ADDRESS) [see explanation at
7903 beginning of this section]. Any necessary discriminants' values
7904 should be in DVAL, a record value; it may be NULL if the object
7905 at ADDR itself contains any necessary discriminant values.
7906 Additionally, VALADDR and ADDRESS may also be NULL if no discriminant
7907 values from the record are needed. Except in the case that DVAL,
7908 VALADDR, and ADDRESS are all 0 or NULL, a variant field (unless
7909 unchecked) is replaced by a particular branch of the variant.
7911 NOTE: the case in which DVAL and VALADDR are NULL and ADDRESS is 0
7912 is questionable and may be removed. It can arise during the
7913 processing of an unconstrained-array-of-record type where all the
7914 variant branches have exactly the same size. This is because in
7915 such cases, the compiler does not bother to use the XVS convention
7916 when encoding the record. I am currently dubious of this
7917 shortcut and suspect the compiler should be altered. FIXME. */
7919 static struct type *
7920 to_fixed_record_type (struct type *type0, const gdb_byte *valaddr,
7921 CORE_ADDR address, struct value *dval)
7923 struct type *templ_type;
7925 if (TYPE_FIXED_INSTANCE (type0))
7928 templ_type = dynamic_template_type (type0);
7930 if (templ_type != NULL)
7931 return template_to_fixed_record_type (templ_type, valaddr, address, dval);
7932 else if (variant_field_index (type0) >= 0)
7934 if (dval == NULL && valaddr == NULL && address == 0)
7936 return to_record_with_fixed_variant_part (type0, valaddr, address,
7941 TYPE_FIXED_INSTANCE (type0) = 1;
7947 /* An ordinary record type (with fixed-length fields) that describes
7948 the value at (VAR_TYPE0, VALADDR, ADDRESS), where VAR_TYPE0 is a
7949 union type. Any necessary discriminants' values should be in DVAL,
7950 a record value. That is, this routine selects the appropriate
7951 branch of the union at ADDR according to the discriminant value
7952 indicated in the union's type name. Returns VAR_TYPE0 itself if
7953 it represents a variant subject to a pragma Unchecked_Union. */
7955 static struct type *
7956 to_fixed_variant_branch_type (struct type *var_type0, const gdb_byte *valaddr,
7957 CORE_ADDR address, struct value *dval)
7960 struct type *templ_type;
7961 struct type *var_type;
7963 if (TYPE_CODE (var_type0) == TYPE_CODE_PTR)
7964 var_type = TYPE_TARGET_TYPE (var_type0);
7966 var_type = var_type0;
7968 templ_type = ada_find_parallel_type (var_type, "___XVU");
7970 if (templ_type != NULL)
7971 var_type = templ_type;
7973 if (is_unchecked_variant (var_type, value_type (dval)))
7976 ada_which_variant_applies (var_type,
7977 value_type (dval), value_contents (dval));
7980 return empty_record (var_type);
7981 else if (is_dynamic_field (var_type, which))
7982 return to_fixed_record_type
7983 (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (var_type, which)),
7984 valaddr, address, dval);
7985 else if (variant_field_index (TYPE_FIELD_TYPE (var_type, which)) >= 0)
7987 to_fixed_record_type
7988 (TYPE_FIELD_TYPE (var_type, which), valaddr, address, dval);
7990 return TYPE_FIELD_TYPE (var_type, which);
7993 /* Assuming that TYPE0 is an array type describing the type of a value
7994 at ADDR, and that DVAL describes a record containing any
7995 discriminants used in TYPE0, returns a type for the value that
7996 contains no dynamic components (that is, no components whose sizes
7997 are determined by run-time quantities). Unless IGNORE_TOO_BIG is
7998 true, gives an error message if the resulting type's size is over
8001 static struct type *
8002 to_fixed_array_type (struct type *type0, struct value *dval,
8005 struct type *index_type_desc;
8006 struct type *result;
8007 int constrained_packed_array_p;
8009 type0 = ada_check_typedef (type0);
8010 if (TYPE_FIXED_INSTANCE (type0))
8013 constrained_packed_array_p = ada_is_constrained_packed_array_type (type0);
8014 if (constrained_packed_array_p)
8015 type0 = decode_constrained_packed_array_type (type0);
8017 index_type_desc = ada_find_parallel_type (type0, "___XA");
8018 ada_fixup_array_indexes_type (index_type_desc);
8019 if (index_type_desc == NULL)
8021 struct type *elt_type0 = ada_check_typedef (TYPE_TARGET_TYPE (type0));
8023 /* NOTE: elt_type---the fixed version of elt_type0---should never
8024 depend on the contents of the array in properly constructed
8026 /* Create a fixed version of the array element type.
8027 We're not providing the address of an element here,
8028 and thus the actual object value cannot be inspected to do
8029 the conversion. This should not be a problem, since arrays of
8030 unconstrained objects are not allowed. In particular, all
8031 the elements of an array of a tagged type should all be of
8032 the same type specified in the debugging info. No need to
8033 consult the object tag. */
8034 struct type *elt_type = ada_to_fixed_type (elt_type0, 0, 0, dval, 1);
8036 /* Make sure we always create a new array type when dealing with
8037 packed array types, since we're going to fix-up the array
8038 type length and element bitsize a little further down. */
8039 if (elt_type0 == elt_type && !constrained_packed_array_p)
8042 result = create_array_type (alloc_type_copy (type0),
8043 elt_type, TYPE_INDEX_TYPE (type0));
8048 struct type *elt_type0;
8051 for (i = TYPE_NFIELDS (index_type_desc); i > 0; i -= 1)
8052 elt_type0 = TYPE_TARGET_TYPE (elt_type0);
8054 /* NOTE: result---the fixed version of elt_type0---should never
8055 depend on the contents of the array in properly constructed
8057 /* Create a fixed version of the array element type.
8058 We're not providing the address of an element here,
8059 and thus the actual object value cannot be inspected to do
8060 the conversion. This should not be a problem, since arrays of
8061 unconstrained objects are not allowed. In particular, all
8062 the elements of an array of a tagged type should all be of
8063 the same type specified in the debugging info. No need to
8064 consult the object tag. */
8066 ada_to_fixed_type (ada_check_typedef (elt_type0), 0, 0, dval, 1);
8069 for (i = TYPE_NFIELDS (index_type_desc) - 1; i >= 0; i -= 1)
8071 struct type *range_type =
8072 to_fixed_range_type (TYPE_FIELD_TYPE (index_type_desc, i), dval);
8074 result = create_array_type (alloc_type_copy (elt_type0),
8075 result, range_type);
8076 elt_type0 = TYPE_TARGET_TYPE (elt_type0);
8078 if (!ignore_too_big && TYPE_LENGTH (result) > varsize_limit)
8079 error (_("array type with dynamic size is larger than varsize-limit"));
8082 /* We want to preserve the type name. This can be useful when
8083 trying to get the type name of a value that has already been
8084 printed (for instance, if the user did "print VAR; whatis $". */
8085 TYPE_NAME (result) = TYPE_NAME (type0);
8087 if (constrained_packed_array_p)
8089 /* So far, the resulting type has been created as if the original
8090 type was a regular (non-packed) array type. As a result, the
8091 bitsize of the array elements needs to be set again, and the array
8092 length needs to be recomputed based on that bitsize. */
8093 int len = TYPE_LENGTH (result) / TYPE_LENGTH (TYPE_TARGET_TYPE (result));
8094 int elt_bitsize = TYPE_FIELD_BITSIZE (type0, 0);
8096 TYPE_FIELD_BITSIZE (result, 0) = TYPE_FIELD_BITSIZE (type0, 0);
8097 TYPE_LENGTH (result) = len * elt_bitsize / HOST_CHAR_BIT;
8098 if (TYPE_LENGTH (result) * HOST_CHAR_BIT < len * elt_bitsize)
8099 TYPE_LENGTH (result)++;
8102 TYPE_FIXED_INSTANCE (result) = 1;
8107 /* A standard type (containing no dynamically sized components)
8108 corresponding to TYPE for the value (TYPE, VALADDR, ADDRESS)
8109 DVAL describes a record containing any discriminants used in TYPE0,
8110 and may be NULL if there are none, or if the object of type TYPE at
8111 ADDRESS or in VALADDR contains these discriminants.
8113 If CHECK_TAG is not null, in the case of tagged types, this function
8114 attempts to locate the object's tag and use it to compute the actual
8115 type. However, when ADDRESS is null, we cannot use it to determine the
8116 location of the tag, and therefore compute the tagged type's actual type.
8117 So we return the tagged type without consulting the tag. */
8119 static struct type *
8120 ada_to_fixed_type_1 (struct type *type, const gdb_byte *valaddr,
8121 CORE_ADDR address, struct value *dval, int check_tag)
8123 type = ada_check_typedef (type);
8124 switch (TYPE_CODE (type))
8128 case TYPE_CODE_STRUCT:
8130 struct type *static_type = to_static_fixed_type (type);
8131 struct type *fixed_record_type =
8132 to_fixed_record_type (type, valaddr, address, NULL);
8134 /* If STATIC_TYPE is a tagged type and we know the object's address,
8135 then we can determine its tag, and compute the object's actual
8136 type from there. Note that we have to use the fixed record
8137 type (the parent part of the record may have dynamic fields
8138 and the way the location of _tag is expressed may depend on
8141 if (check_tag && address != 0 && ada_is_tagged_type (static_type, 0))
8144 value_tag_from_contents_and_address
8148 struct type *real_type = type_from_tag (tag);
8150 value_from_contents_and_address (fixed_record_type,
8153 if (real_type != NULL)
8154 return to_fixed_record_type
8156 value_address (ada_tag_value_at_base_address (obj)), NULL);
8159 /* Check to see if there is a parallel ___XVZ variable.
8160 If there is, then it provides the actual size of our type. */
8161 else if (ada_type_name (fixed_record_type) != NULL)
8163 const char *name = ada_type_name (fixed_record_type);
8164 char *xvz_name = alloca (strlen (name) + 7 /* "___XVZ\0" */);
8168 xsnprintf (xvz_name, strlen (name) + 7, "%s___XVZ", name);
8169 size = get_int_var_value (xvz_name, &xvz_found);
8170 if (xvz_found && TYPE_LENGTH (fixed_record_type) != size)
8172 fixed_record_type = copy_type (fixed_record_type);
8173 TYPE_LENGTH (fixed_record_type) = size;
8175 /* The FIXED_RECORD_TYPE may have be a stub. We have
8176 observed this when the debugging info is STABS, and
8177 apparently it is something that is hard to fix.
8179 In practice, we don't need the actual type definition
8180 at all, because the presence of the XVZ variable allows us
8181 to assume that there must be a XVS type as well, which we
8182 should be able to use later, when we need the actual type
8185 In the meantime, pretend that the "fixed" type we are
8186 returning is NOT a stub, because this can cause trouble
8187 when using this type to create new types targeting it.
8188 Indeed, the associated creation routines often check
8189 whether the target type is a stub and will try to replace
8190 it, thus using a type with the wrong size. This, in turn,
8191 might cause the new type to have the wrong size too.
8192 Consider the case of an array, for instance, where the size
8193 of the array is computed from the number of elements in
8194 our array multiplied by the size of its element. */
8195 TYPE_STUB (fixed_record_type) = 0;
8198 return fixed_record_type;
8200 case TYPE_CODE_ARRAY:
8201 return to_fixed_array_type (type, dval, 1);
8202 case TYPE_CODE_UNION:
8206 return to_fixed_variant_branch_type (type, valaddr, address, dval);
8210 /* The same as ada_to_fixed_type_1, except that it preserves the type
8211 if it is a TYPE_CODE_TYPEDEF of a type that is already fixed.
8213 The typedef layer needs be preserved in order to differentiate between
8214 arrays and array pointers when both types are implemented using the same
8215 fat pointer. In the array pointer case, the pointer is encoded as
8216 a typedef of the pointer type. For instance, considering:
8218 type String_Access is access String;
8219 S1 : String_Access := null;
8221 To the debugger, S1 is defined as a typedef of type String. But
8222 to the user, it is a pointer. So if the user tries to print S1,
8223 we should not dereference the array, but print the array address
8226 If we didn't preserve the typedef layer, we would lose the fact that
8227 the type is to be presented as a pointer (needs de-reference before
8228 being printed). And we would also use the source-level type name. */
8231 ada_to_fixed_type (struct type *type, const gdb_byte *valaddr,
8232 CORE_ADDR address, struct value *dval, int check_tag)
8235 struct type *fixed_type =
8236 ada_to_fixed_type_1 (type, valaddr, address, dval, check_tag);
8238 /* If TYPE is a typedef and its target type is the same as the FIXED_TYPE,
8239 then preserve the typedef layer.
8241 Implementation note: We can only check the main-type portion of
8242 the TYPE and FIXED_TYPE, because eliminating the typedef layer
8243 from TYPE now returns a type that has the same instance flags
8244 as TYPE. For instance, if TYPE is a "typedef const", and its
8245 target type is a "struct", then the typedef elimination will return
8246 a "const" version of the target type. See check_typedef for more
8247 details about how the typedef layer elimination is done.
8249 brobecker/2010-11-19: It seems to me that the only case where it is
8250 useful to preserve the typedef layer is when dealing with fat pointers.
8251 Perhaps, we could add a check for that and preserve the typedef layer
8252 only in that situation. But this seems unecessary so far, probably
8253 because we call check_typedef/ada_check_typedef pretty much everywhere.
8255 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF
8256 && (TYPE_MAIN_TYPE (ada_typedef_target_type (type))
8257 == TYPE_MAIN_TYPE (fixed_type)))
8263 /* A standard (static-sized) type corresponding as well as possible to
8264 TYPE0, but based on no runtime data. */
8266 static struct type *
8267 to_static_fixed_type (struct type *type0)
8274 if (TYPE_FIXED_INSTANCE (type0))
8277 type0 = ada_check_typedef (type0);
8279 switch (TYPE_CODE (type0))
8283 case TYPE_CODE_STRUCT:
8284 type = dynamic_template_type (type0);
8286 return template_to_static_fixed_type (type);
8288 return template_to_static_fixed_type (type0);
8289 case TYPE_CODE_UNION:
8290 type = ada_find_parallel_type (type0, "___XVU");
8292 return template_to_static_fixed_type (type);
8294 return template_to_static_fixed_type (type0);
8298 /* A static approximation of TYPE with all type wrappers removed. */
8300 static struct type *
8301 static_unwrap_type (struct type *type)
8303 if (ada_is_aligner_type (type))
8305 struct type *type1 = TYPE_FIELD_TYPE (ada_check_typedef (type), 0);
8306 if (ada_type_name (type1) == NULL)
8307 TYPE_NAME (type1) = ada_type_name (type);
8309 return static_unwrap_type (type1);
8313 struct type *raw_real_type = ada_get_base_type (type);
8315 if (raw_real_type == type)
8318 return to_static_fixed_type (raw_real_type);
8322 /* In some cases, incomplete and private types require
8323 cross-references that are not resolved as records (for example,
8325 type FooP is access Foo;
8327 type Foo is array ...;
8328 ). In these cases, since there is no mechanism for producing
8329 cross-references to such types, we instead substitute for FooP a
8330 stub enumeration type that is nowhere resolved, and whose tag is
8331 the name of the actual type. Call these types "non-record stubs". */
8333 /* A type equivalent to TYPE that is not a non-record stub, if one
8334 exists, otherwise TYPE. */
8337 ada_check_typedef (struct type *type)
8342 /* If our type is a typedef type of a fat pointer, then we're done.
8343 We don't want to strip the TYPE_CODE_TYPDEF layer, because this is
8344 what allows us to distinguish between fat pointers that represent
8345 array types, and fat pointers that represent array access types
8346 (in both cases, the compiler implements them as fat pointers). */
8347 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF
8348 && is_thick_pntr (ada_typedef_target_type (type)))
8351 CHECK_TYPEDEF (type);
8352 if (type == NULL || TYPE_CODE (type) != TYPE_CODE_ENUM
8353 || !TYPE_STUB (type)
8354 || TYPE_TAG_NAME (type) == NULL)
8358 const char *name = TYPE_TAG_NAME (type);
8359 struct type *type1 = ada_find_any_type (name);
8364 /* TYPE1 might itself be a TYPE_CODE_TYPEDEF (this can happen with
8365 stubs pointing to arrays, as we don't create symbols for array
8366 types, only for the typedef-to-array types). If that's the case,
8367 strip the typedef layer. */
8368 if (TYPE_CODE (type1) == TYPE_CODE_TYPEDEF)
8369 type1 = ada_check_typedef (type1);
8375 /* A value representing the data at VALADDR/ADDRESS as described by
8376 type TYPE0, but with a standard (static-sized) type that correctly
8377 describes it. If VAL0 is not NULL and TYPE0 already is a standard
8378 type, then return VAL0 [this feature is simply to avoid redundant
8379 creation of struct values]. */
8381 static struct value *
8382 ada_to_fixed_value_create (struct type *type0, CORE_ADDR address,
8385 struct type *type = ada_to_fixed_type (type0, 0, address, NULL, 1);
8387 if (type == type0 && val0 != NULL)
8390 return value_from_contents_and_address (type, 0, address);
8393 /* A value representing VAL, but with a standard (static-sized) type
8394 that correctly describes it. Does not necessarily create a new
8398 ada_to_fixed_value (struct value *val)
8400 val = unwrap_value (val);
8401 val = ada_to_fixed_value_create (value_type (val),
8402 value_address (val),
8410 /* Table mapping attribute numbers to names.
8411 NOTE: Keep up to date with enum ada_attribute definition in ada-lang.h. */
8413 static const char *attribute_names[] = {
8431 ada_attribute_name (enum exp_opcode n)
8433 if (n >= OP_ATR_FIRST && n <= (int) OP_ATR_VAL)
8434 return attribute_names[n - OP_ATR_FIRST + 1];
8436 return attribute_names[0];
8439 /* Evaluate the 'POS attribute applied to ARG. */
8442 pos_atr (struct value *arg)
8444 struct value *val = coerce_ref (arg);
8445 struct type *type = value_type (val);
8447 if (!discrete_type_p (type))
8448 error (_("'POS only defined on discrete types"));
8450 if (TYPE_CODE (type) == TYPE_CODE_ENUM)
8453 LONGEST v = value_as_long (val);
8455 for (i = 0; i < TYPE_NFIELDS (type); i += 1)
8457 if (v == TYPE_FIELD_ENUMVAL (type, i))
8460 error (_("enumeration value is invalid: can't find 'POS"));
8463 return value_as_long (val);
8466 static struct value *
8467 value_pos_atr (struct type *type, struct value *arg)
8469 return value_from_longest (type, pos_atr (arg));
8472 /* Evaluate the TYPE'VAL attribute applied to ARG. */
8474 static struct value *
8475 value_val_atr (struct type *type, struct value *arg)
8477 if (!discrete_type_p (type))
8478 error (_("'VAL only defined on discrete types"));
8479 if (!integer_type_p (value_type (arg)))
8480 error (_("'VAL requires integral argument"));
8482 if (TYPE_CODE (type) == TYPE_CODE_ENUM)
8484 long pos = value_as_long (arg);
8486 if (pos < 0 || pos >= TYPE_NFIELDS (type))
8487 error (_("argument to 'VAL out of range"));
8488 return value_from_longest (type, TYPE_FIELD_ENUMVAL (type, pos));
8491 return value_from_longest (type, value_as_long (arg));
8497 /* True if TYPE appears to be an Ada character type.
8498 [At the moment, this is true only for Character and Wide_Character;
8499 It is a heuristic test that could stand improvement]. */
8502 ada_is_character_type (struct type *type)
8506 /* If the type code says it's a character, then assume it really is,
8507 and don't check any further. */
8508 if (TYPE_CODE (type) == TYPE_CODE_CHAR)
8511 /* Otherwise, assume it's a character type iff it is a discrete type
8512 with a known character type name. */
8513 name = ada_type_name (type);
8514 return (name != NULL
8515 && (TYPE_CODE (type) == TYPE_CODE_INT
8516 || TYPE_CODE (type) == TYPE_CODE_RANGE)
8517 && (strcmp (name, "character") == 0
8518 || strcmp (name, "wide_character") == 0
8519 || strcmp (name, "wide_wide_character") == 0
8520 || strcmp (name, "unsigned char") == 0));
8523 /* True if TYPE appears to be an Ada string type. */
8526 ada_is_string_type (struct type *type)
8528 type = ada_check_typedef (type);
8530 && TYPE_CODE (type) != TYPE_CODE_PTR
8531 && (ada_is_simple_array_type (type)
8532 || ada_is_array_descriptor_type (type))
8533 && ada_array_arity (type) == 1)
8535 struct type *elttype = ada_array_element_type (type, 1);
8537 return ada_is_character_type (elttype);
8543 /* The compiler sometimes provides a parallel XVS type for a given
8544 PAD type. Normally, it is safe to follow the PAD type directly,
8545 but older versions of the compiler have a bug that causes the offset
8546 of its "F" field to be wrong. Following that field in that case
8547 would lead to incorrect results, but this can be worked around
8548 by ignoring the PAD type and using the associated XVS type instead.
8550 Set to True if the debugger should trust the contents of PAD types.
8551 Otherwise, ignore the PAD type if there is a parallel XVS type. */
8552 static int trust_pad_over_xvs = 1;
8554 /* True if TYPE is a struct type introduced by the compiler to force the
8555 alignment of a value. Such types have a single field with a
8556 distinctive name. */
8559 ada_is_aligner_type (struct type *type)
8561 type = ada_check_typedef (type);
8563 if (!trust_pad_over_xvs && ada_find_parallel_type (type, "___XVS") != NULL)
8566 return (TYPE_CODE (type) == TYPE_CODE_STRUCT
8567 && TYPE_NFIELDS (type) == 1
8568 && strcmp (TYPE_FIELD_NAME (type, 0), "F") == 0);
8571 /* If there is an ___XVS-convention type parallel to SUBTYPE, return
8572 the parallel type. */
8575 ada_get_base_type (struct type *raw_type)
8577 struct type *real_type_namer;
8578 struct type *raw_real_type;
8580 if (raw_type == NULL || TYPE_CODE (raw_type) != TYPE_CODE_STRUCT)
8583 if (ada_is_aligner_type (raw_type))
8584 /* The encoding specifies that we should always use the aligner type.
8585 So, even if this aligner type has an associated XVS type, we should
8588 According to the compiler gurus, an XVS type parallel to an aligner
8589 type may exist because of a stabs limitation. In stabs, aligner
8590 types are empty because the field has a variable-sized type, and
8591 thus cannot actually be used as an aligner type. As a result,
8592 we need the associated parallel XVS type to decode the type.
8593 Since the policy in the compiler is to not change the internal
8594 representation based on the debugging info format, we sometimes
8595 end up having a redundant XVS type parallel to the aligner type. */
8598 real_type_namer = ada_find_parallel_type (raw_type, "___XVS");
8599 if (real_type_namer == NULL
8600 || TYPE_CODE (real_type_namer) != TYPE_CODE_STRUCT
8601 || TYPE_NFIELDS (real_type_namer) != 1)
8604 if (TYPE_CODE (TYPE_FIELD_TYPE (real_type_namer, 0)) != TYPE_CODE_REF)
8606 /* This is an older encoding form where the base type needs to be
8607 looked up by name. We prefer the newer enconding because it is
8609 raw_real_type = ada_find_any_type (TYPE_FIELD_NAME (real_type_namer, 0));
8610 if (raw_real_type == NULL)
8613 return raw_real_type;
8616 /* The field in our XVS type is a reference to the base type. */
8617 return TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (real_type_namer, 0));
8620 /* The type of value designated by TYPE, with all aligners removed. */
8623 ada_aligned_type (struct type *type)
8625 if (ada_is_aligner_type (type))
8626 return ada_aligned_type (TYPE_FIELD_TYPE (type, 0));
8628 return ada_get_base_type (type);
8632 /* The address of the aligned value in an object at address VALADDR
8633 having type TYPE. Assumes ada_is_aligner_type (TYPE). */
8636 ada_aligned_value_addr (struct type *type, const gdb_byte *valaddr)
8638 if (ada_is_aligner_type (type))
8639 return ada_aligned_value_addr (TYPE_FIELD_TYPE (type, 0),
8641 TYPE_FIELD_BITPOS (type,
8642 0) / TARGET_CHAR_BIT);
8649 /* The printed representation of an enumeration literal with encoded
8650 name NAME. The value is good to the next call of ada_enum_name. */
8652 ada_enum_name (const char *name)
8654 static char *result;
8655 static size_t result_len = 0;
8658 /* First, unqualify the enumeration name:
8659 1. Search for the last '.' character. If we find one, then skip
8660 all the preceding characters, the unqualified name starts
8661 right after that dot.
8662 2. Otherwise, we may be debugging on a target where the compiler
8663 translates dots into "__". Search forward for double underscores,
8664 but stop searching when we hit an overloading suffix, which is
8665 of the form "__" followed by digits. */
8667 tmp = strrchr (name, '.');
8672 while ((tmp = strstr (name, "__")) != NULL)
8674 if (isdigit (tmp[2]))
8685 if (name[1] == 'U' || name[1] == 'W')
8687 if (sscanf (name + 2, "%x", &v) != 1)
8693 GROW_VECT (result, result_len, 16);
8694 if (isascii (v) && isprint (v))
8695 xsnprintf (result, result_len, "'%c'", v);
8696 else if (name[1] == 'U')
8697 xsnprintf (result, result_len, "[\"%02x\"]", v);
8699 xsnprintf (result, result_len, "[\"%04x\"]", v);
8705 tmp = strstr (name, "__");
8707 tmp = strstr (name, "$");
8710 GROW_VECT (result, result_len, tmp - name + 1);
8711 strncpy (result, name, tmp - name);
8712 result[tmp - name] = '\0';
8720 /* Evaluate the subexpression of EXP starting at *POS as for
8721 evaluate_type, updating *POS to point just past the evaluated
8724 static struct value *
8725 evaluate_subexp_type (struct expression *exp, int *pos)
8727 return evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
8730 /* If VAL is wrapped in an aligner or subtype wrapper, return the
8733 static struct value *
8734 unwrap_value (struct value *val)
8736 struct type *type = ada_check_typedef (value_type (val));
8738 if (ada_is_aligner_type (type))
8740 struct value *v = ada_value_struct_elt (val, "F", 0);
8741 struct type *val_type = ada_check_typedef (value_type (v));
8743 if (ada_type_name (val_type) == NULL)
8744 TYPE_NAME (val_type) = ada_type_name (type);
8746 return unwrap_value (v);
8750 struct type *raw_real_type =
8751 ada_check_typedef (ada_get_base_type (type));
8753 /* If there is no parallel XVS or XVE type, then the value is
8754 already unwrapped. Return it without further modification. */
8755 if ((type == raw_real_type)
8756 && ada_find_parallel_type (type, "___XVE") == NULL)
8760 coerce_unspec_val_to_type
8761 (val, ada_to_fixed_type (raw_real_type, 0,
8762 value_address (val),
8767 static struct value *
8768 cast_to_fixed (struct type *type, struct value *arg)
8772 if (type == value_type (arg))
8774 else if (ada_is_fixed_point_type (value_type (arg)))
8775 val = ada_float_to_fixed (type,
8776 ada_fixed_to_float (value_type (arg),
8777 value_as_long (arg)));
8780 DOUBLEST argd = value_as_double (arg);
8782 val = ada_float_to_fixed (type, argd);
8785 return value_from_longest (type, val);
8788 static struct value *
8789 cast_from_fixed (struct type *type, struct value *arg)
8791 DOUBLEST val = ada_fixed_to_float (value_type (arg),
8792 value_as_long (arg));
8794 return value_from_double (type, val);
8797 /* Given two array types T1 and T2, return nonzero iff both arrays
8798 contain the same number of elements. */
8801 ada_same_array_size_p (struct type *t1, struct type *t2)
8803 LONGEST lo1, hi1, lo2, hi2;
8805 /* Get the array bounds in order to verify that the size of
8806 the two arrays match. */
8807 if (!get_array_bounds (t1, &lo1, &hi1)
8808 || !get_array_bounds (t2, &lo2, &hi2))
8809 error (_("unable to determine array bounds"));
8811 /* To make things easier for size comparison, normalize a bit
8812 the case of empty arrays by making sure that the difference
8813 between upper bound and lower bound is always -1. */
8819 return (hi1 - lo1 == hi2 - lo2);
8822 /* Assuming that VAL is an array of integrals, and TYPE represents
8823 an array with the same number of elements, but with wider integral
8824 elements, return an array "casted" to TYPE. In practice, this
8825 means that the returned array is built by casting each element
8826 of the original array into TYPE's (wider) element type. */
8828 static struct value *
8829 ada_promote_array_of_integrals (struct type *type, struct value *val)
8831 struct type *elt_type = TYPE_TARGET_TYPE (type);
8836 /* Verify that both val and type are arrays of scalars, and
8837 that the size of val's elements is smaller than the size
8838 of type's element. */
8839 gdb_assert (TYPE_CODE (type) == TYPE_CODE_ARRAY);
8840 gdb_assert (is_integral_type (TYPE_TARGET_TYPE (type)));
8841 gdb_assert (TYPE_CODE (value_type (val)) == TYPE_CODE_ARRAY);
8842 gdb_assert (is_integral_type (TYPE_TARGET_TYPE (value_type (val))));
8843 gdb_assert (TYPE_LENGTH (TYPE_TARGET_TYPE (type))
8844 > TYPE_LENGTH (TYPE_TARGET_TYPE (value_type (val))));
8846 if (!get_array_bounds (type, &lo, &hi))
8847 error (_("unable to determine array bounds"));
8849 res = allocate_value (type);
8851 /* Promote each array element. */
8852 for (i = 0; i < hi - lo + 1; i++)
8854 struct value *elt = value_cast (elt_type, value_subscript (val, lo + i));
8856 memcpy (value_contents_writeable (res) + (i * TYPE_LENGTH (elt_type)),
8857 value_contents_all (elt), TYPE_LENGTH (elt_type));
8863 /* Coerce VAL as necessary for assignment to an lval of type TYPE, and
8864 return the converted value. */
8866 static struct value *
8867 coerce_for_assign (struct type *type, struct value *val)
8869 struct type *type2 = value_type (val);
8874 type2 = ada_check_typedef (type2);
8875 type = ada_check_typedef (type);
8877 if (TYPE_CODE (type2) == TYPE_CODE_PTR
8878 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
8880 val = ada_value_ind (val);
8881 type2 = value_type (val);
8884 if (TYPE_CODE (type2) == TYPE_CODE_ARRAY
8885 && TYPE_CODE (type) == TYPE_CODE_ARRAY)
8887 if (!ada_same_array_size_p (type, type2))
8888 error (_("cannot assign arrays of different length"));
8890 if (is_integral_type (TYPE_TARGET_TYPE (type))
8891 && is_integral_type (TYPE_TARGET_TYPE (type2))
8892 && TYPE_LENGTH (TYPE_TARGET_TYPE (type2))
8893 < TYPE_LENGTH (TYPE_TARGET_TYPE (type)))
8895 /* Allow implicit promotion of the array elements to
8897 return ada_promote_array_of_integrals (type, val);
8900 if (TYPE_LENGTH (TYPE_TARGET_TYPE (type2))
8901 != TYPE_LENGTH (TYPE_TARGET_TYPE (type)))
8902 error (_("Incompatible types in assignment"));
8903 deprecated_set_value_type (val, type);
8908 static struct value *
8909 ada_value_binop (struct value *arg1, struct value *arg2, enum exp_opcode op)
8912 struct type *type1, *type2;
8915 arg1 = coerce_ref (arg1);
8916 arg2 = coerce_ref (arg2);
8917 type1 = get_base_type (ada_check_typedef (value_type (arg1)));
8918 type2 = get_base_type (ada_check_typedef (value_type (arg2)));
8920 if (TYPE_CODE (type1) != TYPE_CODE_INT
8921 || TYPE_CODE (type2) != TYPE_CODE_INT)
8922 return value_binop (arg1, arg2, op);
8931 return value_binop (arg1, arg2, op);
8934 v2 = value_as_long (arg2);
8936 error (_("second operand of %s must not be zero."), op_string (op));
8938 if (TYPE_UNSIGNED (type1) || op == BINOP_MOD)
8939 return value_binop (arg1, arg2, op);
8941 v1 = value_as_long (arg1);
8946 if (!TRUNCATION_TOWARDS_ZERO && v1 * (v1 % v2) < 0)
8947 v += v > 0 ? -1 : 1;
8955 /* Should not reach this point. */
8959 val = allocate_value (type1);
8960 store_unsigned_integer (value_contents_raw (val),
8961 TYPE_LENGTH (value_type (val)),
8962 gdbarch_byte_order (get_type_arch (type1)), v);
8967 ada_value_equal (struct value *arg1, struct value *arg2)
8969 if (ada_is_direct_array_type (value_type (arg1))
8970 || ada_is_direct_array_type (value_type (arg2)))
8972 /* Automatically dereference any array reference before
8973 we attempt to perform the comparison. */
8974 arg1 = ada_coerce_ref (arg1);
8975 arg2 = ada_coerce_ref (arg2);
8977 arg1 = ada_coerce_to_simple_array (arg1);
8978 arg2 = ada_coerce_to_simple_array (arg2);
8979 if (TYPE_CODE (value_type (arg1)) != TYPE_CODE_ARRAY
8980 || TYPE_CODE (value_type (arg2)) != TYPE_CODE_ARRAY)
8981 error (_("Attempt to compare array with non-array"));
8982 /* FIXME: The following works only for types whose
8983 representations use all bits (no padding or undefined bits)
8984 and do not have user-defined equality. */
8986 TYPE_LENGTH (value_type (arg1)) == TYPE_LENGTH (value_type (arg2))
8987 && memcmp (value_contents (arg1), value_contents (arg2),
8988 TYPE_LENGTH (value_type (arg1))) == 0;
8990 return value_equal (arg1, arg2);
8993 /* Total number of component associations in the aggregate starting at
8994 index PC in EXP. Assumes that index PC is the start of an
8998 num_component_specs (struct expression *exp, int pc)
9002 m = exp->elts[pc + 1].longconst;
9005 for (i = 0; i < m; i += 1)
9007 switch (exp->elts[pc].opcode)
9013 n += exp->elts[pc + 1].longconst;
9016 ada_evaluate_subexp (NULL, exp, &pc, EVAL_SKIP);
9021 /* Assign the result of evaluating EXP starting at *POS to the INDEXth
9022 component of LHS (a simple array or a record), updating *POS past
9023 the expression, assuming that LHS is contained in CONTAINER. Does
9024 not modify the inferior's memory, nor does it modify LHS (unless
9025 LHS == CONTAINER). */
9028 assign_component (struct value *container, struct value *lhs, LONGEST index,
9029 struct expression *exp, int *pos)
9031 struct value *mark = value_mark ();
9034 if (TYPE_CODE (value_type (lhs)) == TYPE_CODE_ARRAY)
9036 struct type *index_type = builtin_type (exp->gdbarch)->builtin_int;
9037 struct value *index_val = value_from_longest (index_type, index);
9039 elt = unwrap_value (ada_value_subscript (lhs, 1, &index_val));
9043 elt = ada_index_struct_field (index, lhs, 0, value_type (lhs));
9044 elt = ada_to_fixed_value (elt);
9047 if (exp->elts[*pos].opcode == OP_AGGREGATE)
9048 assign_aggregate (container, elt, exp, pos, EVAL_NORMAL);
9050 value_assign_to_component (container, elt,
9051 ada_evaluate_subexp (NULL, exp, pos,
9054 value_free_to_mark (mark);
9057 /* Assuming that LHS represents an lvalue having a record or array
9058 type, and EXP->ELTS[*POS] is an OP_AGGREGATE, evaluate an assignment
9059 of that aggregate's value to LHS, advancing *POS past the
9060 aggregate. NOSIDE is as for evaluate_subexp. CONTAINER is an
9061 lvalue containing LHS (possibly LHS itself). Does not modify
9062 the inferior's memory, nor does it modify the contents of
9063 LHS (unless == CONTAINER). Returns the modified CONTAINER. */
9065 static struct value *
9066 assign_aggregate (struct value *container,
9067 struct value *lhs, struct expression *exp,
9068 int *pos, enum noside noside)
9070 struct type *lhs_type;
9071 int n = exp->elts[*pos+1].longconst;
9072 LONGEST low_index, high_index;
9075 int max_indices, num_indices;
9079 if (noside != EVAL_NORMAL)
9081 for (i = 0; i < n; i += 1)
9082 ada_evaluate_subexp (NULL, exp, pos, noside);
9086 container = ada_coerce_ref (container);
9087 if (ada_is_direct_array_type (value_type (container)))
9088 container = ada_coerce_to_simple_array (container);
9089 lhs = ada_coerce_ref (lhs);
9090 if (!deprecated_value_modifiable (lhs))
9091 error (_("Left operand of assignment is not a modifiable lvalue."));
9093 lhs_type = value_type (lhs);
9094 if (ada_is_direct_array_type (lhs_type))
9096 lhs = ada_coerce_to_simple_array (lhs);
9097 lhs_type = value_type (lhs);
9098 low_index = TYPE_ARRAY_LOWER_BOUND_VALUE (lhs_type);
9099 high_index = TYPE_ARRAY_UPPER_BOUND_VALUE (lhs_type);
9101 else if (TYPE_CODE (lhs_type) == TYPE_CODE_STRUCT)
9104 high_index = num_visible_fields (lhs_type) - 1;
9107 error (_("Left-hand side must be array or record."));
9109 num_specs = num_component_specs (exp, *pos - 3);
9110 max_indices = 4 * num_specs + 4;
9111 indices = alloca (max_indices * sizeof (indices[0]));
9112 indices[0] = indices[1] = low_index - 1;
9113 indices[2] = indices[3] = high_index + 1;
9116 for (i = 0; i < n; i += 1)
9118 switch (exp->elts[*pos].opcode)
9121 aggregate_assign_from_choices (container, lhs, exp, pos, indices,
9122 &num_indices, max_indices,
9123 low_index, high_index);
9126 aggregate_assign_positional (container, lhs, exp, pos, indices,
9127 &num_indices, max_indices,
9128 low_index, high_index);
9132 error (_("Misplaced 'others' clause"));
9133 aggregate_assign_others (container, lhs, exp, pos, indices,
9134 num_indices, low_index, high_index);
9137 error (_("Internal error: bad aggregate clause"));
9144 /* Assign into the component of LHS indexed by the OP_POSITIONAL
9145 construct at *POS, updating *POS past the construct, given that
9146 the positions are relative to lower bound LOW, where HIGH is the
9147 upper bound. Record the position in INDICES[0 .. MAX_INDICES-1]
9148 updating *NUM_INDICES as needed. CONTAINER is as for
9149 assign_aggregate. */
9151 aggregate_assign_positional (struct value *container,
9152 struct value *lhs, struct expression *exp,
9153 int *pos, LONGEST *indices, int *num_indices,
9154 int max_indices, LONGEST low, LONGEST high)
9156 LONGEST ind = longest_to_int (exp->elts[*pos + 1].longconst) + low;
9158 if (ind - 1 == high)
9159 warning (_("Extra components in aggregate ignored."));
9162 add_component_interval (ind, ind, indices, num_indices, max_indices);
9164 assign_component (container, lhs, ind, exp, pos);
9167 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
9170 /* Assign into the components of LHS indexed by the OP_CHOICES
9171 construct at *POS, updating *POS past the construct, given that
9172 the allowable indices are LOW..HIGH. Record the indices assigned
9173 to in INDICES[0 .. MAX_INDICES-1], updating *NUM_INDICES as
9174 needed. CONTAINER is as for assign_aggregate. */
9176 aggregate_assign_from_choices (struct value *container,
9177 struct value *lhs, struct expression *exp,
9178 int *pos, LONGEST *indices, int *num_indices,
9179 int max_indices, LONGEST low, LONGEST high)
9182 int n_choices = longest_to_int (exp->elts[*pos+1].longconst);
9183 int choice_pos, expr_pc;
9184 int is_array = ada_is_direct_array_type (value_type (lhs));
9186 choice_pos = *pos += 3;
9188 for (j = 0; j < n_choices; j += 1)
9189 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
9191 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
9193 for (j = 0; j < n_choices; j += 1)
9195 LONGEST lower, upper;
9196 enum exp_opcode op = exp->elts[choice_pos].opcode;
9198 if (op == OP_DISCRETE_RANGE)
9201 lower = value_as_long (ada_evaluate_subexp (NULL, exp, pos,
9203 upper = value_as_long (ada_evaluate_subexp (NULL, exp, pos,
9208 lower = value_as_long (ada_evaluate_subexp (NULL, exp, &choice_pos,
9220 name = &exp->elts[choice_pos + 2].string;
9223 name = SYMBOL_NATURAL_NAME (exp->elts[choice_pos + 2].symbol);
9226 error (_("Invalid record component association."));
9228 ada_evaluate_subexp (NULL, exp, &choice_pos, EVAL_SKIP);
9230 if (! find_struct_field (name, value_type (lhs), 0,
9231 NULL, NULL, NULL, NULL, &ind))
9232 error (_("Unknown component name: %s."), name);
9233 lower = upper = ind;
9236 if (lower <= upper && (lower < low || upper > high))
9237 error (_("Index in component association out of bounds."));
9239 add_component_interval (lower, upper, indices, num_indices,
9241 while (lower <= upper)
9246 assign_component (container, lhs, lower, exp, &pos1);
9252 /* Assign the value of the expression in the OP_OTHERS construct in
9253 EXP at *POS into the components of LHS indexed from LOW .. HIGH that
9254 have not been previously assigned. The index intervals already assigned
9255 are in INDICES[0 .. NUM_INDICES-1]. Updates *POS to after the
9256 OP_OTHERS clause. CONTAINER is as for assign_aggregate. */
9258 aggregate_assign_others (struct value *container,
9259 struct value *lhs, struct expression *exp,
9260 int *pos, LONGEST *indices, int num_indices,
9261 LONGEST low, LONGEST high)
9264 int expr_pc = *pos + 1;
9266 for (i = 0; i < num_indices - 2; i += 2)
9270 for (ind = indices[i + 1] + 1; ind < indices[i + 2]; ind += 1)
9275 assign_component (container, lhs, ind, exp, &localpos);
9278 ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP);
9281 /* Add the interval [LOW .. HIGH] to the sorted set of intervals
9282 [ INDICES[0] .. INDICES[1] ],..., [ INDICES[*SIZE-2] .. INDICES[*SIZE-1] ],
9283 modifying *SIZE as needed. It is an error if *SIZE exceeds
9284 MAX_SIZE. The resulting intervals do not overlap. */
9286 add_component_interval (LONGEST low, LONGEST high,
9287 LONGEST* indices, int *size, int max_size)
9291 for (i = 0; i < *size; i += 2) {
9292 if (high >= indices[i] && low <= indices[i + 1])
9296 for (kh = i + 2; kh < *size; kh += 2)
9297 if (high < indices[kh])
9299 if (low < indices[i])
9301 indices[i + 1] = indices[kh - 1];
9302 if (high > indices[i + 1])
9303 indices[i + 1] = high;
9304 memcpy (indices + i + 2, indices + kh, *size - kh);
9305 *size -= kh - i - 2;
9308 else if (high < indices[i])
9312 if (*size == max_size)
9313 error (_("Internal error: miscounted aggregate components."));
9315 for (j = *size-1; j >= i+2; j -= 1)
9316 indices[j] = indices[j - 2];
9318 indices[i + 1] = high;
9321 /* Perform and Ada cast of ARG2 to type TYPE if the type of ARG2
9324 static struct value *
9325 ada_value_cast (struct type *type, struct value *arg2, enum noside noside)
9327 if (type == ada_check_typedef (value_type (arg2)))
9330 if (ada_is_fixed_point_type (type))
9331 return (cast_to_fixed (type, arg2));
9333 if (ada_is_fixed_point_type (value_type (arg2)))
9334 return cast_from_fixed (type, arg2);
9336 return value_cast (type, arg2);
9339 /* Evaluating Ada expressions, and printing their result.
9340 ------------------------------------------------------
9345 We usually evaluate an Ada expression in order to print its value.
9346 We also evaluate an expression in order to print its type, which
9347 happens during the EVAL_AVOID_SIDE_EFFECTS phase of the evaluation,
9348 but we'll focus mostly on the EVAL_NORMAL phase. In practice, the
9349 EVAL_AVOID_SIDE_EFFECTS phase allows us to simplify certain aspects of
9350 the evaluation compared to the EVAL_NORMAL, but is otherwise very
9353 Evaluating expressions is a little more complicated for Ada entities
9354 than it is for entities in languages such as C. The main reason for
9355 this is that Ada provides types whose definition might be dynamic.
9356 One example of such types is variant records. Or another example
9357 would be an array whose bounds can only be known at run time.
9359 The following description is a general guide as to what should be
9360 done (and what should NOT be done) in order to evaluate an expression
9361 involving such types, and when. This does not cover how the semantic
9362 information is encoded by GNAT as this is covered separatly. For the
9363 document used as the reference for the GNAT encoding, see exp_dbug.ads
9364 in the GNAT sources.
9366 Ideally, we should embed each part of this description next to its
9367 associated code. Unfortunately, the amount of code is so vast right
9368 now that it's hard to see whether the code handling a particular
9369 situation might be duplicated or not. One day, when the code is
9370 cleaned up, this guide might become redundant with the comments
9371 inserted in the code, and we might want to remove it.
9373 2. ``Fixing'' an Entity, the Simple Case:
9374 -----------------------------------------
9376 When evaluating Ada expressions, the tricky issue is that they may
9377 reference entities whose type contents and size are not statically
9378 known. Consider for instance a variant record:
9380 type Rec (Empty : Boolean := True) is record
9383 when False => Value : Integer;
9386 Yes : Rec := (Empty => False, Value => 1);
9387 No : Rec := (empty => True);
9389 The size and contents of that record depends on the value of the
9390 descriminant (Rec.Empty). At this point, neither the debugging
9391 information nor the associated type structure in GDB are able to
9392 express such dynamic types. So what the debugger does is to create
9393 "fixed" versions of the type that applies to the specific object.
9394 We also informally refer to this opperation as "fixing" an object,
9395 which means creating its associated fixed type.
9397 Example: when printing the value of variable "Yes" above, its fixed
9398 type would look like this:
9405 On the other hand, if we printed the value of "No", its fixed type
9412 Things become a little more complicated when trying to fix an entity
9413 with a dynamic type that directly contains another dynamic type,
9414 such as an array of variant records, for instance. There are
9415 two possible cases: Arrays, and records.
9417 3. ``Fixing'' Arrays:
9418 ---------------------
9420 The type structure in GDB describes an array in terms of its bounds,
9421 and the type of its elements. By design, all elements in the array
9422 have the same type and we cannot represent an array of variant elements
9423 using the current type structure in GDB. When fixing an array,
9424 we cannot fix the array element, as we would potentially need one
9425 fixed type per element of the array. As a result, the best we can do
9426 when fixing an array is to produce an array whose bounds and size
9427 are correct (allowing us to read it from memory), but without having
9428 touched its element type. Fixing each element will be done later,
9429 when (if) necessary.
9431 Arrays are a little simpler to handle than records, because the same
9432 amount of memory is allocated for each element of the array, even if
9433 the amount of space actually used by each element differs from element
9434 to element. Consider for instance the following array of type Rec:
9436 type Rec_Array is array (1 .. 2) of Rec;
9438 The actual amount of memory occupied by each element might be different
9439 from element to element, depending on the value of their discriminant.
9440 But the amount of space reserved for each element in the array remains
9441 fixed regardless. So we simply need to compute that size using
9442 the debugging information available, from which we can then determine
9443 the array size (we multiply the number of elements of the array by
9444 the size of each element).
9446 The simplest case is when we have an array of a constrained element
9447 type. For instance, consider the following type declarations:
9449 type Bounded_String (Max_Size : Integer) is
9451 Buffer : String (1 .. Max_Size);
9453 type Bounded_String_Array is array (1 ..2) of Bounded_String (80);
9455 In this case, the compiler describes the array as an array of
9456 variable-size elements (identified by its XVS suffix) for which
9457 the size can be read in the parallel XVZ variable.
9459 In the case of an array of an unconstrained element type, the compiler
9460 wraps the array element inside a private PAD type. This type should not
9461 be shown to the user, and must be "unwrap"'ed before printing. Note
9462 that we also use the adjective "aligner" in our code to designate
9463 these wrapper types.
9465 In some cases, the size allocated for each element is statically
9466 known. In that case, the PAD type already has the correct size,
9467 and the array element should remain unfixed.
9469 But there are cases when this size is not statically known.
9470 For instance, assuming that "Five" is an integer variable:
9472 type Dynamic is array (1 .. Five) of Integer;
9473 type Wrapper (Has_Length : Boolean := False) is record
9476 when True => Length : Integer;
9480 type Wrapper_Array is array (1 .. 2) of Wrapper;
9482 Hello : Wrapper_Array := (others => (Has_Length => True,
9483 Data => (others => 17),
9487 The debugging info would describe variable Hello as being an
9488 array of a PAD type. The size of that PAD type is not statically
9489 known, but can be determined using a parallel XVZ variable.
9490 In that case, a copy of the PAD type with the correct size should
9491 be used for the fixed array.
9493 3. ``Fixing'' record type objects:
9494 ----------------------------------
9496 Things are slightly different from arrays in the case of dynamic
9497 record types. In this case, in order to compute the associated
9498 fixed type, we need to determine the size and offset of each of
9499 its components. This, in turn, requires us to compute the fixed
9500 type of each of these components.
9502 Consider for instance the example:
9504 type Bounded_String (Max_Size : Natural) is record
9505 Str : String (1 .. Max_Size);
9508 My_String : Bounded_String (Max_Size => 10);
9510 In that case, the position of field "Length" depends on the size
9511 of field Str, which itself depends on the value of the Max_Size
9512 discriminant. In order to fix the type of variable My_String,
9513 we need to fix the type of field Str. Therefore, fixing a variant
9514 record requires us to fix each of its components.
9516 However, if a component does not have a dynamic size, the component
9517 should not be fixed. In particular, fields that use a PAD type
9518 should not fixed. Here is an example where this might happen
9519 (assuming type Rec above):
9521 type Container (Big : Boolean) is record
9525 when True => Another : Integer;
9529 My_Container : Container := (Big => False,
9530 First => (Empty => True),
9533 In that example, the compiler creates a PAD type for component First,
9534 whose size is constant, and then positions the component After just
9535 right after it. The offset of component After is therefore constant
9538 The debugger computes the position of each field based on an algorithm
9539 that uses, among other things, the actual position and size of the field
9540 preceding it. Let's now imagine that the user is trying to print
9541 the value of My_Container. If the type fixing was recursive, we would
9542 end up computing the offset of field After based on the size of the
9543 fixed version of field First. And since in our example First has
9544 only one actual field, the size of the fixed type is actually smaller
9545 than the amount of space allocated to that field, and thus we would
9546 compute the wrong offset of field After.
9548 To make things more complicated, we need to watch out for dynamic
9549 components of variant records (identified by the ___XVL suffix in
9550 the component name). Even if the target type is a PAD type, the size
9551 of that type might not be statically known. So the PAD type needs
9552 to be unwrapped and the resulting type needs to be fixed. Otherwise,
9553 we might end up with the wrong size for our component. This can be
9554 observed with the following type declarations:
9556 type Octal is new Integer range 0 .. 7;
9557 type Octal_Array is array (Positive range <>) of Octal;
9558 pragma Pack (Octal_Array);
9560 type Octal_Buffer (Size : Positive) is record
9561 Buffer : Octal_Array (1 .. Size);
9565 In that case, Buffer is a PAD type whose size is unset and needs
9566 to be computed by fixing the unwrapped type.
9568 4. When to ``Fix'' un-``Fixed'' sub-elements of an entity:
9569 ----------------------------------------------------------
9571 Lastly, when should the sub-elements of an entity that remained unfixed
9572 thus far, be actually fixed?
9574 The answer is: Only when referencing that element. For instance
9575 when selecting one component of a record, this specific component
9576 should be fixed at that point in time. Or when printing the value
9577 of a record, each component should be fixed before its value gets
9578 printed. Similarly for arrays, the element of the array should be
9579 fixed when printing each element of the array, or when extracting
9580 one element out of that array. On the other hand, fixing should
9581 not be performed on the elements when taking a slice of an array!
9583 Note that one of the side-effects of miscomputing the offset and
9584 size of each field is that we end up also miscomputing the size
9585 of the containing type. This can have adverse results when computing
9586 the value of an entity. GDB fetches the value of an entity based
9587 on the size of its type, and thus a wrong size causes GDB to fetch
9588 the wrong amount of memory. In the case where the computed size is
9589 too small, GDB fetches too little data to print the value of our
9590 entiry. Results in this case as unpredicatble, as we usually read
9591 past the buffer containing the data =:-o. */
9593 /* Implement the evaluate_exp routine in the exp_descriptor structure
9594 for the Ada language. */
9596 static struct value *
9597 ada_evaluate_subexp (struct type *expect_type, struct expression *exp,
9598 int *pos, enum noside noside)
9603 struct value *arg1 = NULL, *arg2 = NULL, *arg3;
9606 struct value **argvec;
9610 op = exp->elts[pc].opcode;
9616 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
9618 if (noside == EVAL_NORMAL)
9619 arg1 = unwrap_value (arg1);
9621 /* If evaluating an OP_DOUBLE and an EXPECT_TYPE was provided,
9622 then we need to perform the conversion manually, because
9623 evaluate_subexp_standard doesn't do it. This conversion is
9624 necessary in Ada because the different kinds of float/fixed
9625 types in Ada have different representations.
9627 Similarly, we need to perform the conversion from OP_LONG
9629 if ((op == OP_DOUBLE || op == OP_LONG) && expect_type != NULL)
9630 arg1 = ada_value_cast (expect_type, arg1, noside);
9636 struct value *result;
9639 result = evaluate_subexp_standard (expect_type, exp, pos, noside);
9640 /* The result type will have code OP_STRING, bashed there from
9641 OP_ARRAY. Bash it back. */
9642 if (TYPE_CODE (value_type (result)) == TYPE_CODE_STRING)
9643 TYPE_CODE (value_type (result)) = TYPE_CODE_ARRAY;
9649 type = exp->elts[pc + 1].type;
9650 arg1 = evaluate_subexp (type, exp, pos, noside);
9651 if (noside == EVAL_SKIP)
9653 arg1 = ada_value_cast (type, arg1, noside);
9658 type = exp->elts[pc + 1].type;
9659 return ada_evaluate_subexp (type, exp, pos, noside);
9662 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9663 if (exp->elts[*pos].opcode == OP_AGGREGATE)
9665 arg1 = assign_aggregate (arg1, arg1, exp, pos, noside);
9666 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
9668 return ada_value_assign (arg1, arg1);
9670 /* Force the evaluation of the rhs ARG2 to the type of the lhs ARG1,
9671 except if the lhs of our assignment is a convenience variable.
9672 In the case of assigning to a convenience variable, the lhs
9673 should be exactly the result of the evaluation of the rhs. */
9674 type = value_type (arg1);
9675 if (VALUE_LVAL (arg1) == lval_internalvar)
9677 arg2 = evaluate_subexp (type, exp, pos, noside);
9678 if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS)
9680 if (ada_is_fixed_point_type (value_type (arg1)))
9681 arg2 = cast_to_fixed (value_type (arg1), arg2);
9682 else if (ada_is_fixed_point_type (value_type (arg2)))
9684 (_("Fixed-point values must be assigned to fixed-point variables"));
9686 arg2 = coerce_for_assign (value_type (arg1), arg2);
9687 return ada_value_assign (arg1, arg2);
9690 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
9691 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
9692 if (noside == EVAL_SKIP)
9694 if (TYPE_CODE (value_type (arg1)) == TYPE_CODE_PTR)
9695 return (value_from_longest
9697 value_as_long (arg1) + value_as_long (arg2)));
9698 if ((ada_is_fixed_point_type (value_type (arg1))
9699 || ada_is_fixed_point_type (value_type (arg2)))
9700 && value_type (arg1) != value_type (arg2))
9701 error (_("Operands of fixed-point addition must have the same type"));
9702 /* Do the addition, and cast the result to the type of the first
9703 argument. We cannot cast the result to a reference type, so if
9704 ARG1 is a reference type, find its underlying type. */
9705 type = value_type (arg1);
9706 while (TYPE_CODE (type) == TYPE_CODE_REF)
9707 type = TYPE_TARGET_TYPE (type);
9708 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
9709 return value_cast (type, value_binop (arg1, arg2, BINOP_ADD));
9712 arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
9713 arg2 = evaluate_subexp_with_coercion (exp, pos, noside);
9714 if (noside == EVAL_SKIP)
9716 if (TYPE_CODE (value_type (arg1)) == TYPE_CODE_PTR)
9717 return (value_from_longest
9719 value_as_long (arg1) - value_as_long (arg2)));
9720 if ((ada_is_fixed_point_type (value_type (arg1))
9721 || ada_is_fixed_point_type (value_type (arg2)))
9722 && value_type (arg1) != value_type (arg2))
9723 error (_("Operands of fixed-point subtraction "
9724 "must have the same type"));
9725 /* Do the substraction, and cast the result to the type of the first
9726 argument. We cannot cast the result to a reference type, so if
9727 ARG1 is a reference type, find its underlying type. */
9728 type = value_type (arg1);
9729 while (TYPE_CODE (type) == TYPE_CODE_REF)
9730 type = TYPE_TARGET_TYPE (type);
9731 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
9732 return value_cast (type, value_binop (arg1, arg2, BINOP_SUB));
9738 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9739 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9740 if (noside == EVAL_SKIP)
9742 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
9744 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
9745 return value_zero (value_type (arg1), not_lval);
9749 type = builtin_type (exp->gdbarch)->builtin_double;
9750 if (ada_is_fixed_point_type (value_type (arg1)))
9751 arg1 = cast_from_fixed (type, arg1);
9752 if (ada_is_fixed_point_type (value_type (arg2)))
9753 arg2 = cast_from_fixed (type, arg2);
9754 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
9755 return ada_value_binop (arg1, arg2, op);
9759 case BINOP_NOTEQUAL:
9760 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9761 arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside);
9762 if (noside == EVAL_SKIP)
9764 if (noside == EVAL_AVOID_SIDE_EFFECTS)
9768 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
9769 tem = ada_value_equal (arg1, arg2);
9771 if (op == BINOP_NOTEQUAL)
9773 type = language_bool_type (exp->language_defn, exp->gdbarch);
9774 return value_from_longest (type, (LONGEST) tem);
9777 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9778 if (noside == EVAL_SKIP)
9780 else if (ada_is_fixed_point_type (value_type (arg1)))
9781 return value_cast (value_type (arg1), value_neg (arg1));
9784 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
9785 return value_neg (arg1);
9788 case BINOP_LOGICAL_AND:
9789 case BINOP_LOGICAL_OR:
9790 case UNOP_LOGICAL_NOT:
9795 val = evaluate_subexp_standard (expect_type, exp, pos, noside);
9796 type = language_bool_type (exp->language_defn, exp->gdbarch);
9797 return value_cast (type, val);
9800 case BINOP_BITWISE_AND:
9801 case BINOP_BITWISE_IOR:
9802 case BINOP_BITWISE_XOR:
9806 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS);
9808 val = evaluate_subexp_standard (expect_type, exp, pos, noside);
9810 return value_cast (value_type (arg1), val);
9816 if (noside == EVAL_SKIP)
9821 else if (SYMBOL_DOMAIN (exp->elts[pc + 2].symbol) == UNDEF_DOMAIN)
9822 /* Only encountered when an unresolved symbol occurs in a
9823 context other than a function call, in which case, it is
9825 error (_("Unexpected unresolved symbol, %s, during evaluation"),
9826 SYMBOL_PRINT_NAME (exp->elts[pc + 2].symbol));
9827 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
9829 type = static_unwrap_type (SYMBOL_TYPE (exp->elts[pc + 2].symbol));
9830 /* Check to see if this is a tagged type. We also need to handle
9831 the case where the type is a reference to a tagged type, but
9832 we have to be careful to exclude pointers to tagged types.
9833 The latter should be shown as usual (as a pointer), whereas
9834 a reference should mostly be transparent to the user. */
9835 if (ada_is_tagged_type (type, 0)
9836 || (TYPE_CODE(type) == TYPE_CODE_REF
9837 && ada_is_tagged_type (TYPE_TARGET_TYPE (type), 0)))
9839 /* Tagged types are a little special in the fact that the real
9840 type is dynamic and can only be determined by inspecting the
9841 object's tag. This means that we need to get the object's
9842 value first (EVAL_NORMAL) and then extract the actual object
9845 Note that we cannot skip the final step where we extract
9846 the object type from its tag, because the EVAL_NORMAL phase
9847 results in dynamic components being resolved into fixed ones.
9848 This can cause problems when trying to print the type
9849 description of tagged types whose parent has a dynamic size:
9850 We use the type name of the "_parent" component in order
9851 to print the name of the ancestor type in the type description.
9852 If that component had a dynamic size, the resolution into
9853 a fixed type would result in the loss of that type name,
9854 thus preventing us from printing the name of the ancestor
9855 type in the type description. */
9856 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL);
9858 if (TYPE_CODE (type) != TYPE_CODE_REF)
9860 struct type *actual_type;
9862 actual_type = type_from_tag (ada_value_tag (arg1));
9863 if (actual_type == NULL)
9864 /* If, for some reason, we were unable to determine
9865 the actual type from the tag, then use the static
9866 approximation that we just computed as a fallback.
9867 This can happen if the debugging information is
9868 incomplete, for instance. */
9870 return value_zero (actual_type, not_lval);
9874 /* In the case of a ref, ada_coerce_ref takes care
9875 of determining the actual type. But the evaluation
9876 should return a ref as it should be valid to ask
9877 for its address; so rebuild a ref after coerce. */
9878 arg1 = ada_coerce_ref (arg1);
9879 return value_ref (arg1);
9885 (to_static_fixed_type
9886 (static_unwrap_type (SYMBOL_TYPE (exp->elts[pc + 2].symbol))),
9891 arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside);
9892 return ada_to_fixed_value (arg1);
9898 /* Allocate arg vector, including space for the function to be
9899 called in argvec[0] and a terminating NULL. */
9900 nargs = longest_to_int (exp->elts[pc + 1].longconst);
9902 (struct value **) alloca (sizeof (struct value *) * (nargs + 2));
9904 if (exp->elts[*pos].opcode == OP_VAR_VALUE
9905 && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN)
9906 error (_("Unexpected unresolved symbol, %s, during evaluation"),
9907 SYMBOL_PRINT_NAME (exp->elts[pc + 5].symbol));
9910 for (tem = 0; tem <= nargs; tem += 1)
9911 argvec[tem] = evaluate_subexp (NULL_TYPE, exp, pos, noside);
9914 if (noside == EVAL_SKIP)
9918 if (ada_is_constrained_packed_array_type
9919 (desc_base_type (value_type (argvec[0]))))
9920 argvec[0] = ada_coerce_to_simple_array (argvec[0]);
9921 else if (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_ARRAY
9922 && TYPE_FIELD_BITSIZE (value_type (argvec[0]), 0) != 0)
9923 /* This is a packed array that has already been fixed, and
9924 therefore already coerced to a simple array. Nothing further
9927 else if (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_REF
9928 || (TYPE_CODE (value_type (argvec[0])) == TYPE_CODE_ARRAY
9929 && VALUE_LVAL (argvec[0]) == lval_memory))
9930 argvec[0] = value_addr (argvec[0]);
9932 type = ada_check_typedef (value_type (argvec[0]));
9934 /* Ada allows us to implicitly dereference arrays when subscripting
9935 them. So, if this is an array typedef (encoding use for array
9936 access types encoded as fat pointers), strip it now. */
9937 if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
9938 type = ada_typedef_target_type (type);
9940 if (TYPE_CODE (type) == TYPE_CODE_PTR)
9942 switch (TYPE_CODE (ada_check_typedef (TYPE_TARGET_TYPE (type))))
9944 case TYPE_CODE_FUNC:
9945 type = ada_check_typedef (TYPE_TARGET_TYPE (type));
9947 case TYPE_CODE_ARRAY:
9949 case TYPE_CODE_STRUCT:
9950 if (noside != EVAL_AVOID_SIDE_EFFECTS)
9951 argvec[0] = ada_value_ind (argvec[0]);
9952 type = ada_check_typedef (TYPE_TARGET_TYPE (type));
9955 error (_("cannot subscript or call something of type `%s'"),
9956 ada_type_name (value_type (argvec[0])));
9961 switch (TYPE_CODE (type))
9963 case TYPE_CODE_FUNC:
9964 if (noside == EVAL_AVOID_SIDE_EFFECTS)
9966 struct type *rtype = TYPE_TARGET_TYPE (type);
9968 if (TYPE_GNU_IFUNC (type))
9969 return allocate_value (TYPE_TARGET_TYPE (rtype));
9970 return allocate_value (rtype);
9972 return call_function_by_hand (argvec[0], nargs, argvec + 1);
9973 case TYPE_CODE_INTERNAL_FUNCTION:
9974 if (noside == EVAL_AVOID_SIDE_EFFECTS)
9975 /* We don't know anything about what the internal
9976 function might return, but we have to return
9978 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
9981 return call_internal_function (exp->gdbarch, exp->language_defn,
9982 argvec[0], nargs, argvec + 1);
9984 case TYPE_CODE_STRUCT:
9988 arity = ada_array_arity (type);
9989 type = ada_array_element_type (type, nargs);
9991 error (_("cannot subscript or call a record"));
9993 error (_("wrong number of subscripts; expecting %d"), arity);
9994 if (noside == EVAL_AVOID_SIDE_EFFECTS)
9995 return value_zero (ada_aligned_type (type), lval_memory);
9997 unwrap_value (ada_value_subscript
9998 (argvec[0], nargs, argvec + 1));
10000 case TYPE_CODE_ARRAY:
10001 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10003 type = ada_array_element_type (type, nargs);
10005 error (_("element type of array unknown"));
10007 return value_zero (ada_aligned_type (type), lval_memory);
10010 unwrap_value (ada_value_subscript
10011 (ada_coerce_to_simple_array (argvec[0]),
10012 nargs, argvec + 1));
10013 case TYPE_CODE_PTR: /* Pointer to array */
10014 type = to_fixed_array_type (TYPE_TARGET_TYPE (type), NULL, 1);
10015 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10017 type = ada_array_element_type (type, nargs);
10019 error (_("element type of array unknown"));
10021 return value_zero (ada_aligned_type (type), lval_memory);
10024 unwrap_value (ada_value_ptr_subscript (argvec[0], type,
10025 nargs, argvec + 1));
10028 error (_("Attempt to index or call something other than an "
10029 "array or function"));
10034 struct value *array = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10035 struct value *low_bound_val =
10036 evaluate_subexp (NULL_TYPE, exp, pos, noside);
10037 struct value *high_bound_val =
10038 evaluate_subexp (NULL_TYPE, exp, pos, noside);
10040 LONGEST high_bound;
10042 low_bound_val = coerce_ref (low_bound_val);
10043 high_bound_val = coerce_ref (high_bound_val);
10044 low_bound = pos_atr (low_bound_val);
10045 high_bound = pos_atr (high_bound_val);
10047 if (noside == EVAL_SKIP)
10050 /* If this is a reference to an aligner type, then remove all
10052 if (TYPE_CODE (value_type (array)) == TYPE_CODE_REF
10053 && ada_is_aligner_type (TYPE_TARGET_TYPE (value_type (array))))
10054 TYPE_TARGET_TYPE (value_type (array)) =
10055 ada_aligned_type (TYPE_TARGET_TYPE (value_type (array)));
10057 if (ada_is_constrained_packed_array_type (value_type (array)))
10058 error (_("cannot slice a packed array"));
10060 /* If this is a reference to an array or an array lvalue,
10061 convert to a pointer. */
10062 if (TYPE_CODE (value_type (array)) == TYPE_CODE_REF
10063 || (TYPE_CODE (value_type (array)) == TYPE_CODE_ARRAY
10064 && VALUE_LVAL (array) == lval_memory))
10065 array = value_addr (array);
10067 if (noside == EVAL_AVOID_SIDE_EFFECTS
10068 && ada_is_array_descriptor_type (ada_check_typedef
10069 (value_type (array))))
10070 return empty_array (ada_type_of_array (array, 0), low_bound);
10072 array = ada_coerce_to_simple_array_ptr (array);
10074 /* If we have more than one level of pointer indirection,
10075 dereference the value until we get only one level. */
10076 while (TYPE_CODE (value_type (array)) == TYPE_CODE_PTR
10077 && (TYPE_CODE (TYPE_TARGET_TYPE (value_type (array)))
10079 array = value_ind (array);
10081 /* Make sure we really do have an array type before going further,
10082 to avoid a SEGV when trying to get the index type or the target
10083 type later down the road if the debug info generated by
10084 the compiler is incorrect or incomplete. */
10085 if (!ada_is_simple_array_type (value_type (array)))
10086 error (_("cannot take slice of non-array"));
10088 if (TYPE_CODE (ada_check_typedef (value_type (array)))
10091 struct type *type0 = ada_check_typedef (value_type (array));
10093 if (high_bound < low_bound || noside == EVAL_AVOID_SIDE_EFFECTS)
10094 return empty_array (TYPE_TARGET_TYPE (type0), low_bound);
10097 struct type *arr_type0 =
10098 to_fixed_array_type (TYPE_TARGET_TYPE (type0), NULL, 1);
10100 return ada_value_slice_from_ptr (array, arr_type0,
10101 longest_to_int (low_bound),
10102 longest_to_int (high_bound));
10105 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
10107 else if (high_bound < low_bound)
10108 return empty_array (value_type (array), low_bound);
10110 return ada_value_slice (array, longest_to_int (low_bound),
10111 longest_to_int (high_bound));
10114 case UNOP_IN_RANGE:
10116 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10117 type = check_typedef (exp->elts[pc + 1].type);
10119 if (noside == EVAL_SKIP)
10122 switch (TYPE_CODE (type))
10125 lim_warning (_("Membership test incompletely implemented; "
10126 "always returns true"));
10127 type = language_bool_type (exp->language_defn, exp->gdbarch);
10128 return value_from_longest (type, (LONGEST) 1);
10130 case TYPE_CODE_RANGE:
10131 arg2 = value_from_longest (type, TYPE_LOW_BOUND (type));
10132 arg3 = value_from_longest (type, TYPE_HIGH_BOUND (type));
10133 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
10134 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3);
10135 type = language_bool_type (exp->language_defn, exp->gdbarch);
10137 value_from_longest (type,
10138 (value_less (arg1, arg3)
10139 || value_equal (arg1, arg3))
10140 && (value_less (arg2, arg1)
10141 || value_equal (arg2, arg1)));
10144 case BINOP_IN_BOUNDS:
10146 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10147 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10149 if (noside == EVAL_SKIP)
10152 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10154 type = language_bool_type (exp->language_defn, exp->gdbarch);
10155 return value_zero (type, not_lval);
10158 tem = longest_to_int (exp->elts[pc + 1].longconst);
10160 type = ada_index_type (value_type (arg2), tem, "range");
10162 type = value_type (arg1);
10164 arg3 = value_from_longest (type, ada_array_bound (arg2, tem, 1));
10165 arg2 = value_from_longest (type, ada_array_bound (arg2, tem, 0));
10167 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
10168 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3);
10169 type = language_bool_type (exp->language_defn, exp->gdbarch);
10171 value_from_longest (type,
10172 (value_less (arg1, arg3)
10173 || value_equal (arg1, arg3))
10174 && (value_less (arg2, arg1)
10175 || value_equal (arg2, arg1)));
10177 case TERNOP_IN_RANGE:
10178 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10179 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10180 arg3 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10182 if (noside == EVAL_SKIP)
10185 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
10186 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3);
10187 type = language_bool_type (exp->language_defn, exp->gdbarch);
10189 value_from_longest (type,
10190 (value_less (arg1, arg3)
10191 || value_equal (arg1, arg3))
10192 && (value_less (arg2, arg1)
10193 || value_equal (arg2, arg1)));
10197 case OP_ATR_LENGTH:
10199 struct type *type_arg;
10201 if (exp->elts[*pos].opcode == OP_TYPE)
10203 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
10205 type_arg = check_typedef (exp->elts[pc + 2].type);
10209 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10213 if (exp->elts[*pos].opcode != OP_LONG)
10214 error (_("Invalid operand to '%s"), ada_attribute_name (op));
10215 tem = longest_to_int (exp->elts[*pos + 2].longconst);
10218 if (noside == EVAL_SKIP)
10221 if (type_arg == NULL)
10223 arg1 = ada_coerce_ref (arg1);
10225 if (ada_is_constrained_packed_array_type (value_type (arg1)))
10226 arg1 = ada_coerce_to_simple_array (arg1);
10228 type = ada_index_type (value_type (arg1), tem,
10229 ada_attribute_name (op));
10231 type = builtin_type (exp->gdbarch)->builtin_int;
10233 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10234 return allocate_value (type);
10238 default: /* Should never happen. */
10239 error (_("unexpected attribute encountered"));
10241 return value_from_longest
10242 (type, ada_array_bound (arg1, tem, 0));
10244 return value_from_longest
10245 (type, ada_array_bound (arg1, tem, 1));
10246 case OP_ATR_LENGTH:
10247 return value_from_longest
10248 (type, ada_array_length (arg1, tem));
10251 else if (discrete_type_p (type_arg))
10253 struct type *range_type;
10254 const char *name = ada_type_name (type_arg);
10257 if (name != NULL && TYPE_CODE (type_arg) != TYPE_CODE_ENUM)
10258 range_type = to_fixed_range_type (type_arg, NULL);
10259 if (range_type == NULL)
10260 range_type = type_arg;
10264 error (_("unexpected attribute encountered"));
10266 return value_from_longest
10267 (range_type, ada_discrete_type_low_bound (range_type));
10269 return value_from_longest
10270 (range_type, ada_discrete_type_high_bound (range_type));
10271 case OP_ATR_LENGTH:
10272 error (_("the 'length attribute applies only to array types"));
10275 else if (TYPE_CODE (type_arg) == TYPE_CODE_FLT)
10276 error (_("unimplemented type attribute"));
10281 if (ada_is_constrained_packed_array_type (type_arg))
10282 type_arg = decode_constrained_packed_array_type (type_arg);
10284 type = ada_index_type (type_arg, tem, ada_attribute_name (op));
10286 type = builtin_type (exp->gdbarch)->builtin_int;
10288 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10289 return allocate_value (type);
10294 error (_("unexpected attribute encountered"));
10296 low = ada_array_bound_from_type (type_arg, tem, 0);
10297 return value_from_longest (type, low);
10299 high = ada_array_bound_from_type (type_arg, tem, 1);
10300 return value_from_longest (type, high);
10301 case OP_ATR_LENGTH:
10302 low = ada_array_bound_from_type (type_arg, tem, 0);
10303 high = ada_array_bound_from_type (type_arg, tem, 1);
10304 return value_from_longest (type, high - low + 1);
10310 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10311 if (noside == EVAL_SKIP)
10314 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10315 return value_zero (ada_tag_type (arg1), not_lval);
10317 return ada_value_tag (arg1);
10321 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
10322 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10323 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10324 if (noside == EVAL_SKIP)
10326 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
10327 return value_zero (value_type (arg1), not_lval);
10330 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
10331 return value_binop (arg1, arg2,
10332 op == OP_ATR_MIN ? BINOP_MIN : BINOP_MAX);
10335 case OP_ATR_MODULUS:
10337 struct type *type_arg = check_typedef (exp->elts[pc + 2].type);
10339 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
10340 if (noside == EVAL_SKIP)
10343 if (!ada_is_modular_type (type_arg))
10344 error (_("'modulus must be applied to modular type"));
10346 return value_from_longest (TYPE_TARGET_TYPE (type_arg),
10347 ada_modulus (type_arg));
10352 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
10353 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10354 if (noside == EVAL_SKIP)
10356 type = builtin_type (exp->gdbarch)->builtin_int;
10357 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10358 return value_zero (type, not_lval);
10360 return value_pos_atr (type, arg1);
10363 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10364 type = value_type (arg1);
10366 /* If the argument is a reference, then dereference its type, since
10367 the user is really asking for the size of the actual object,
10368 not the size of the pointer. */
10369 if (TYPE_CODE (type) == TYPE_CODE_REF)
10370 type = TYPE_TARGET_TYPE (type);
10372 if (noside == EVAL_SKIP)
10374 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
10375 return value_zero (builtin_type (exp->gdbarch)->builtin_int, not_lval);
10377 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int,
10378 TARGET_CHAR_BIT * TYPE_LENGTH (type));
10381 evaluate_subexp (NULL_TYPE, exp, pos, EVAL_SKIP);
10382 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10383 type = exp->elts[pc + 2].type;
10384 if (noside == EVAL_SKIP)
10386 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
10387 return value_zero (type, not_lval);
10389 return value_val_atr (type, arg1);
10392 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10393 arg2 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10394 if (noside == EVAL_SKIP)
10396 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
10397 return value_zero (value_type (arg1), not_lval);
10400 /* For integer exponentiation operations,
10401 only promote the first argument. */
10402 if (is_integral_type (value_type (arg2)))
10403 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
10405 binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2);
10407 return value_binop (arg1, arg2, op);
10411 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10412 if (noside == EVAL_SKIP)
10418 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10419 if (noside == EVAL_SKIP)
10421 unop_promote (exp->language_defn, exp->gdbarch, &arg1);
10422 if (value_less (arg1, value_zero (value_type (arg1), not_lval)))
10423 return value_neg (arg1);
10428 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10429 if (noside == EVAL_SKIP)
10431 type = ada_check_typedef (value_type (arg1));
10432 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10434 if (ada_is_array_descriptor_type (type))
10435 /* GDB allows dereferencing GNAT array descriptors. */
10437 struct type *arrType = ada_type_of_array (arg1, 0);
10439 if (arrType == NULL)
10440 error (_("Attempt to dereference null array pointer."));
10441 return value_at_lazy (arrType, 0);
10443 else if (TYPE_CODE (type) == TYPE_CODE_PTR
10444 || TYPE_CODE (type) == TYPE_CODE_REF
10445 /* In C you can dereference an array to get the 1st elt. */
10446 || TYPE_CODE (type) == TYPE_CODE_ARRAY)
10448 type = to_static_fixed_type
10450 (ada_check_typedef (TYPE_TARGET_TYPE (type))));
10452 return value_zero (type, lval_memory);
10454 else if (TYPE_CODE (type) == TYPE_CODE_INT)
10456 /* GDB allows dereferencing an int. */
10457 if (expect_type == NULL)
10458 return value_zero (builtin_type (exp->gdbarch)->builtin_int,
10463 to_static_fixed_type (ada_aligned_type (expect_type));
10464 return value_zero (expect_type, lval_memory);
10468 error (_("Attempt to take contents of a non-pointer value."));
10470 arg1 = ada_coerce_ref (arg1); /* FIXME: What is this for?? */
10471 type = ada_check_typedef (value_type (arg1));
10473 if (TYPE_CODE (type) == TYPE_CODE_INT)
10474 /* GDB allows dereferencing an int. If we were given
10475 the expect_type, then use that as the target type.
10476 Otherwise, assume that the target type is an int. */
10478 if (expect_type != NULL)
10479 return ada_value_ind (value_cast (lookup_pointer_type (expect_type),
10482 return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int,
10483 (CORE_ADDR) value_as_address (arg1));
10486 if (ada_is_array_descriptor_type (type))
10487 /* GDB allows dereferencing GNAT array descriptors. */
10488 return ada_coerce_to_simple_array (arg1);
10490 return ada_value_ind (arg1);
10492 case STRUCTOP_STRUCT:
10493 tem = longest_to_int (exp->elts[pc + 1].longconst);
10494 (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1);
10495 arg1 = evaluate_subexp (NULL_TYPE, exp, pos, noside);
10496 if (noside == EVAL_SKIP)
10498 if (noside == EVAL_AVOID_SIDE_EFFECTS)
10500 struct type *type1 = value_type (arg1);
10502 if (ada_is_tagged_type (type1, 1))
10504 type = ada_lookup_struct_elt_type (type1,
10505 &exp->elts[pc + 2].string,
10508 /* In this case, we assume that the field COULD exist
10509 in some extension of the type. Return an object of
10510 "type" void, which will match any formal
10511 (see ada_type_match). */
10512 return value_zero (builtin_type (exp->gdbarch)->builtin_void,
10517 ada_lookup_struct_elt_type (type1, &exp->elts[pc + 2].string, 1,
10520 return value_zero (ada_aligned_type (type), lval_memory);
10523 arg1 = ada_value_struct_elt (arg1, &exp->elts[pc + 2].string, 0);
10524 arg1 = unwrap_value (arg1);
10525 return ada_to_fixed_value (arg1);
10528 /* The value is not supposed to be used. This is here to make it
10529 easier to accommodate expressions that contain types. */
10531 if (noside == EVAL_SKIP)
10533 else if (noside == EVAL_AVOID_SIDE_EFFECTS)
10534 return allocate_value (exp->elts[pc + 1].type);
10536 error (_("Attempt to use a type name as an expression"));
10541 case OP_DISCRETE_RANGE:
10542 case OP_POSITIONAL:
10544 if (noside == EVAL_NORMAL)
10548 error (_("Undefined name, ambiguous name, or renaming used in "
10549 "component association: %s."), &exp->elts[pc+2].string);
10551 error (_("Aggregates only allowed on the right of an assignment"));
10553 internal_error (__FILE__, __LINE__,
10554 _("aggregate apparently mangled"));
10557 ada_forward_operator_length (exp, pc, &oplen, &nargs);
10559 for (tem = 0; tem < nargs; tem += 1)
10560 ada_evaluate_subexp (NULL, exp, pos, noside);
10565 return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
10571 /* If TYPE encodes an Ada fixed-point type, return the suffix of the
10572 type name that encodes the 'small and 'delta information.
10573 Otherwise, return NULL. */
10575 static const char *
10576 fixed_type_info (struct type *type)
10578 const char *name = ada_type_name (type);
10579 enum type_code code = (type == NULL) ? TYPE_CODE_UNDEF : TYPE_CODE (type);
10581 if ((code == TYPE_CODE_INT || code == TYPE_CODE_RANGE) && name != NULL)
10583 const char *tail = strstr (name, "___XF_");
10590 else if (code == TYPE_CODE_RANGE && TYPE_TARGET_TYPE (type) != type)
10591 return fixed_type_info (TYPE_TARGET_TYPE (type));
10596 /* Returns non-zero iff TYPE represents an Ada fixed-point type. */
10599 ada_is_fixed_point_type (struct type *type)
10601 return fixed_type_info (type) != NULL;
10604 /* Return non-zero iff TYPE represents a System.Address type. */
10607 ada_is_system_address_type (struct type *type)
10609 return (TYPE_NAME (type)
10610 && strcmp (TYPE_NAME (type), "system__address") == 0);
10613 /* Assuming that TYPE is the representation of an Ada fixed-point
10614 type, return its delta, or -1 if the type is malformed and the
10615 delta cannot be determined. */
10618 ada_delta (struct type *type)
10620 const char *encoding = fixed_type_info (type);
10623 /* Strictly speaking, num and den are encoded as integer. However,
10624 they may not fit into a long, and they will have to be converted
10625 to DOUBLEST anyway. So scan them as DOUBLEST. */
10626 if (sscanf (encoding, "_%" DOUBLEST_SCAN_FORMAT "_%" DOUBLEST_SCAN_FORMAT,
10633 /* Assuming that ada_is_fixed_point_type (TYPE), return the scaling
10634 factor ('SMALL value) associated with the type. */
10637 scaling_factor (struct type *type)
10639 const char *encoding = fixed_type_info (type);
10640 DOUBLEST num0, den0, num1, den1;
10643 /* Strictly speaking, num's and den's are encoded as integer. However,
10644 they may not fit into a long, and they will have to be converted
10645 to DOUBLEST anyway. So scan them as DOUBLEST. */
10646 n = sscanf (encoding,
10647 "_%" DOUBLEST_SCAN_FORMAT "_%" DOUBLEST_SCAN_FORMAT
10648 "_%" DOUBLEST_SCAN_FORMAT "_%" DOUBLEST_SCAN_FORMAT,
10649 &num0, &den0, &num1, &den1);
10654 return num1 / den1;
10656 return num0 / den0;
10660 /* Assuming that X is the representation of a value of fixed-point
10661 type TYPE, return its floating-point equivalent. */
10664 ada_fixed_to_float (struct type *type, LONGEST x)
10666 return (DOUBLEST) x *scaling_factor (type);
10669 /* The representation of a fixed-point value of type TYPE
10670 corresponding to the value X. */
10673 ada_float_to_fixed (struct type *type, DOUBLEST x)
10675 return (LONGEST) (x / scaling_factor (type) + 0.5);
10682 /* Scan STR beginning at position K for a discriminant name, and
10683 return the value of that discriminant field of DVAL in *PX. If
10684 PNEW_K is not null, put the position of the character beyond the
10685 name scanned in *PNEW_K. Return 1 if successful; return 0 and do
10686 not alter *PX and *PNEW_K if unsuccessful. */
10689 scan_discrim_bound (char *str, int k, struct value *dval, LONGEST * px,
10692 static char *bound_buffer = NULL;
10693 static size_t bound_buffer_len = 0;
10696 struct value *bound_val;
10698 if (dval == NULL || str == NULL || str[k] == '\0')
10701 pend = strstr (str + k, "__");
10705 k += strlen (bound);
10709 GROW_VECT (bound_buffer, bound_buffer_len, pend - (str + k) + 1);
10710 bound = bound_buffer;
10711 strncpy (bound_buffer, str + k, pend - (str + k));
10712 bound[pend - (str + k)] = '\0';
10716 bound_val = ada_search_struct_field (bound, dval, 0, value_type (dval));
10717 if (bound_val == NULL)
10720 *px = value_as_long (bound_val);
10721 if (pnew_k != NULL)
10726 /* Value of variable named NAME in the current environment. If
10727 no such variable found, then if ERR_MSG is null, returns 0, and
10728 otherwise causes an error with message ERR_MSG. */
10730 static struct value *
10731 get_var_value (char *name, char *err_msg)
10733 struct ada_symbol_info *syms;
10736 nsyms = ada_lookup_symbol_list (name, get_selected_block (0), VAR_DOMAIN,
10741 if (err_msg == NULL)
10744 error (("%s"), err_msg);
10747 return value_of_variable (syms[0].sym, syms[0].block);
10750 /* Value of integer variable named NAME in the current environment. If
10751 no such variable found, returns 0, and sets *FLAG to 0. If
10752 successful, sets *FLAG to 1. */
10755 get_int_var_value (char *name, int *flag)
10757 struct value *var_val = get_var_value (name, 0);
10769 return value_as_long (var_val);
10774 /* Return a range type whose base type is that of the range type named
10775 NAME in the current environment, and whose bounds are calculated
10776 from NAME according to the GNAT range encoding conventions.
10777 Extract discriminant values, if needed, from DVAL. ORIG_TYPE is the
10778 corresponding range type from debug information; fall back to using it
10779 if symbol lookup fails. If a new type must be created, allocate it
10780 like ORIG_TYPE was. The bounds information, in general, is encoded
10781 in NAME, the base type given in the named range type. */
10783 static struct type *
10784 to_fixed_range_type (struct type *raw_type, struct value *dval)
10787 struct type *base_type;
10788 char *subtype_info;
10790 gdb_assert (raw_type != NULL);
10791 gdb_assert (TYPE_NAME (raw_type) != NULL);
10793 if (TYPE_CODE (raw_type) == TYPE_CODE_RANGE)
10794 base_type = TYPE_TARGET_TYPE (raw_type);
10796 base_type = raw_type;
10798 name = TYPE_NAME (raw_type);
10799 subtype_info = strstr (name, "___XD");
10800 if (subtype_info == NULL)
10802 LONGEST L = ada_discrete_type_low_bound (raw_type);
10803 LONGEST U = ada_discrete_type_high_bound (raw_type);
10805 if (L < INT_MIN || U > INT_MAX)
10808 return create_range_type (alloc_type_copy (raw_type), raw_type,
10809 ada_discrete_type_low_bound (raw_type),
10810 ada_discrete_type_high_bound (raw_type));
10814 static char *name_buf = NULL;
10815 static size_t name_len = 0;
10816 int prefix_len = subtype_info - name;
10822 GROW_VECT (name_buf, name_len, prefix_len + 5);
10823 strncpy (name_buf, name, prefix_len);
10824 name_buf[prefix_len] = '\0';
10827 bounds_str = strchr (subtype_info, '_');
10830 if (*subtype_info == 'L')
10832 if (!ada_scan_number (bounds_str, n, &L, &n)
10833 && !scan_discrim_bound (bounds_str, n, dval, &L, &n))
10835 if (bounds_str[n] == '_')
10837 else if (bounds_str[n] == '.') /* FIXME? SGI Workshop kludge. */
10845 strcpy (name_buf + prefix_len, "___L");
10846 L = get_int_var_value (name_buf, &ok);
10849 lim_warning (_("Unknown lower bound, using 1."));
10854 if (*subtype_info == 'U')
10856 if (!ada_scan_number (bounds_str, n, &U, &n)
10857 && !scan_discrim_bound (bounds_str, n, dval, &U, &n))
10864 strcpy (name_buf + prefix_len, "___U");
10865 U = get_int_var_value (name_buf, &ok);
10868 lim_warning (_("Unknown upper bound, using %ld."), (long) L);
10873 type = create_range_type (alloc_type_copy (raw_type), base_type, L, U);
10874 TYPE_NAME (type) = name;
10879 /* True iff NAME is the name of a range type. */
10882 ada_is_range_type_name (const char *name)
10884 return (name != NULL && strstr (name, "___XD"));
10888 /* Modular types */
10890 /* True iff TYPE is an Ada modular type. */
10893 ada_is_modular_type (struct type *type)
10895 struct type *subranged_type = get_base_type (type);
10897 return (subranged_type != NULL && TYPE_CODE (type) == TYPE_CODE_RANGE
10898 && TYPE_CODE (subranged_type) == TYPE_CODE_INT
10899 && TYPE_UNSIGNED (subranged_type));
10902 /* Assuming ada_is_modular_type (TYPE), the modulus of TYPE. */
10905 ada_modulus (struct type *type)
10907 return (ULONGEST) TYPE_HIGH_BOUND (type) + 1;
10911 /* Ada exception catchpoint support:
10912 ---------------------------------
10914 We support 3 kinds of exception catchpoints:
10915 . catchpoints on Ada exceptions
10916 . catchpoints on unhandled Ada exceptions
10917 . catchpoints on failed assertions
10919 Exceptions raised during failed assertions, or unhandled exceptions
10920 could perfectly be caught with the general catchpoint on Ada exceptions.
10921 However, we can easily differentiate these two special cases, and having
10922 the option to distinguish these two cases from the rest can be useful
10923 to zero-in on certain situations.
10925 Exception catchpoints are a specialized form of breakpoint,
10926 since they rely on inserting breakpoints inside known routines
10927 of the GNAT runtime. The implementation therefore uses a standard
10928 breakpoint structure of the BP_BREAKPOINT type, but with its own set
10931 Support in the runtime for exception catchpoints have been changed
10932 a few times already, and these changes affect the implementation
10933 of these catchpoints. In order to be able to support several
10934 variants of the runtime, we use a sniffer that will determine
10935 the runtime variant used by the program being debugged. */
10937 /* The different types of catchpoints that we introduced for catching
10940 enum exception_catchpoint_kind
10942 ex_catch_exception,
10943 ex_catch_exception_unhandled,
10947 /* Ada's standard exceptions. */
10949 static char *standard_exc[] = {
10950 "constraint_error",
10956 typedef CORE_ADDR (ada_unhandled_exception_name_addr_ftype) (void);
10958 /* A structure that describes how to support exception catchpoints
10959 for a given executable. */
10961 struct exception_support_info
10963 /* The name of the symbol to break on in order to insert
10964 a catchpoint on exceptions. */
10965 const char *catch_exception_sym;
10967 /* The name of the symbol to break on in order to insert
10968 a catchpoint on unhandled exceptions. */
10969 const char *catch_exception_unhandled_sym;
10971 /* The name of the symbol to break on in order to insert
10972 a catchpoint on failed assertions. */
10973 const char *catch_assert_sym;
10975 /* Assuming that the inferior just triggered an unhandled exception
10976 catchpoint, this function is responsible for returning the address
10977 in inferior memory where the name of that exception is stored.
10978 Return zero if the address could not be computed. */
10979 ada_unhandled_exception_name_addr_ftype *unhandled_exception_name_addr;
10982 static CORE_ADDR ada_unhandled_exception_name_addr (void);
10983 static CORE_ADDR ada_unhandled_exception_name_addr_from_raise (void);
10985 /* The following exception support info structure describes how to
10986 implement exception catchpoints with the latest version of the
10987 Ada runtime (as of 2007-03-06). */
10989 static const struct exception_support_info default_exception_support_info =
10991 "__gnat_debug_raise_exception", /* catch_exception_sym */
10992 "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */
10993 "__gnat_debug_raise_assert_failure", /* catch_assert_sym */
10994 ada_unhandled_exception_name_addr
10997 /* The following exception support info structure describes how to
10998 implement exception catchpoints with a slightly older version
10999 of the Ada runtime. */
11001 static const struct exception_support_info exception_support_info_fallback =
11003 "__gnat_raise_nodefer_with_msg", /* catch_exception_sym */
11004 "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */
11005 "system__assertions__raise_assert_failure", /* catch_assert_sym */
11006 ada_unhandled_exception_name_addr_from_raise
11009 /* Return nonzero if we can detect the exception support routines
11010 described in EINFO.
11012 This function errors out if an abnormal situation is detected
11013 (for instance, if we find the exception support routines, but
11014 that support is found to be incomplete). */
11017 ada_has_this_exception_support (const struct exception_support_info *einfo)
11019 struct symbol *sym;
11021 /* The symbol we're looking up is provided by a unit in the GNAT runtime
11022 that should be compiled with debugging information. As a result, we
11023 expect to find that symbol in the symtabs. */
11025 sym = standard_lookup (einfo->catch_exception_sym, NULL, VAR_DOMAIN);
11028 /* Perhaps we did not find our symbol because the Ada runtime was
11029 compiled without debugging info, or simply stripped of it.
11030 It happens on some GNU/Linux distributions for instance, where
11031 users have to install a separate debug package in order to get
11032 the runtime's debugging info. In that situation, let the user
11033 know why we cannot insert an Ada exception catchpoint.
11035 Note: Just for the purpose of inserting our Ada exception
11036 catchpoint, we could rely purely on the associated minimal symbol.
11037 But we would be operating in degraded mode anyway, since we are
11038 still lacking the debugging info needed later on to extract
11039 the name of the exception being raised (this name is printed in
11040 the catchpoint message, and is also used when trying to catch
11041 a specific exception). We do not handle this case for now. */
11042 if (lookup_minimal_symbol (einfo->catch_exception_sym, NULL, NULL))
11043 error (_("Your Ada runtime appears to be missing some debugging "
11044 "information.\nCannot insert Ada exception catchpoint "
11045 "in this configuration."));
11050 /* Make sure that the symbol we found corresponds to a function. */
11052 if (SYMBOL_CLASS (sym) != LOC_BLOCK)
11053 error (_("Symbol \"%s\" is not a function (class = %d)"),
11054 SYMBOL_LINKAGE_NAME (sym), SYMBOL_CLASS (sym));
11059 /* Inspect the Ada runtime and determine which exception info structure
11060 should be used to provide support for exception catchpoints.
11062 This function will always set the per-inferior exception_info,
11063 or raise an error. */
11066 ada_exception_support_info_sniffer (void)
11068 struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ());
11070 /* If the exception info is already known, then no need to recompute it. */
11071 if (data->exception_info != NULL)
11074 /* Check the latest (default) exception support info. */
11075 if (ada_has_this_exception_support (&default_exception_support_info))
11077 data->exception_info = &default_exception_support_info;
11081 /* Try our fallback exception suport info. */
11082 if (ada_has_this_exception_support (&exception_support_info_fallback))
11084 data->exception_info = &exception_support_info_fallback;
11088 /* Sometimes, it is normal for us to not be able to find the routine
11089 we are looking for. This happens when the program is linked with
11090 the shared version of the GNAT runtime, and the program has not been
11091 started yet. Inform the user of these two possible causes if
11094 if (ada_update_initial_language (language_unknown) != language_ada)
11095 error (_("Unable to insert catchpoint. Is this an Ada main program?"));
11097 /* If the symbol does not exist, then check that the program is
11098 already started, to make sure that shared libraries have been
11099 loaded. If it is not started, this may mean that the symbol is
11100 in a shared library. */
11102 if (ptid_get_pid (inferior_ptid) == 0)
11103 error (_("Unable to insert catchpoint. Try to start the program first."));
11105 /* At this point, we know that we are debugging an Ada program and
11106 that the inferior has been started, but we still are not able to
11107 find the run-time symbols. That can mean that we are in
11108 configurable run time mode, or that a-except as been optimized
11109 out by the linker... In any case, at this point it is not worth
11110 supporting this feature. */
11112 error (_("Cannot insert Ada exception catchpoints in this configuration."));
11115 /* True iff FRAME is very likely to be that of a function that is
11116 part of the runtime system. This is all very heuristic, but is
11117 intended to be used as advice as to what frames are uninteresting
11121 is_known_support_routine (struct frame_info *frame)
11123 struct symtab_and_line sal;
11125 enum language func_lang;
11127 const char *fullname;
11129 /* If this code does not have any debugging information (no symtab),
11130 This cannot be any user code. */
11132 find_frame_sal (frame, &sal);
11133 if (sal.symtab == NULL)
11136 /* If there is a symtab, but the associated source file cannot be
11137 located, then assume this is not user code: Selecting a frame
11138 for which we cannot display the code would not be very helpful
11139 for the user. This should also take care of case such as VxWorks
11140 where the kernel has some debugging info provided for a few units. */
11142 fullname = symtab_to_fullname (sal.symtab);
11143 if (access (fullname, R_OK) != 0)
11146 /* Check the unit filename againt the Ada runtime file naming.
11147 We also check the name of the objfile against the name of some
11148 known system libraries that sometimes come with debugging info
11151 for (i = 0; known_runtime_file_name_patterns[i] != NULL; i += 1)
11153 re_comp (known_runtime_file_name_patterns[i]);
11154 if (re_exec (lbasename (sal.symtab->filename)))
11156 if (sal.symtab->objfile != NULL
11157 && re_exec (objfile_name (sal.symtab->objfile)))
11161 /* Check whether the function is a GNAT-generated entity. */
11163 find_frame_funname (frame, &func_name, &func_lang, NULL);
11164 if (func_name == NULL)
11167 for (i = 0; known_auxiliary_function_name_patterns[i] != NULL; i += 1)
11169 re_comp (known_auxiliary_function_name_patterns[i]);
11170 if (re_exec (func_name))
11181 /* Find the first frame that contains debugging information and that is not
11182 part of the Ada run-time, starting from FI and moving upward. */
11185 ada_find_printable_frame (struct frame_info *fi)
11187 for (; fi != NULL; fi = get_prev_frame (fi))
11189 if (!is_known_support_routine (fi))
11198 /* Assuming that the inferior just triggered an unhandled exception
11199 catchpoint, return the address in inferior memory where the name
11200 of the exception is stored.
11202 Return zero if the address could not be computed. */
11205 ada_unhandled_exception_name_addr (void)
11207 return parse_and_eval_address ("e.full_name");
11210 /* Same as ada_unhandled_exception_name_addr, except that this function
11211 should be used when the inferior uses an older version of the runtime,
11212 where the exception name needs to be extracted from a specific frame
11213 several frames up in the callstack. */
11216 ada_unhandled_exception_name_addr_from_raise (void)
11219 struct frame_info *fi;
11220 struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ());
11221 struct cleanup *old_chain;
11223 /* To determine the name of this exception, we need to select
11224 the frame corresponding to RAISE_SYM_NAME. This frame is
11225 at least 3 levels up, so we simply skip the first 3 frames
11226 without checking the name of their associated function. */
11227 fi = get_current_frame ();
11228 for (frame_level = 0; frame_level < 3; frame_level += 1)
11230 fi = get_prev_frame (fi);
11232 old_chain = make_cleanup (null_cleanup, NULL);
11236 enum language func_lang;
11238 find_frame_funname (fi, &func_name, &func_lang, NULL);
11239 if (func_name != NULL)
11241 make_cleanup (xfree, func_name);
11243 if (strcmp (func_name,
11244 data->exception_info->catch_exception_sym) == 0)
11245 break; /* We found the frame we were looking for... */
11246 fi = get_prev_frame (fi);
11249 do_cleanups (old_chain);
11255 return parse_and_eval_address ("id.full_name");
11258 /* Assuming the inferior just triggered an Ada exception catchpoint
11259 (of any type), return the address in inferior memory where the name
11260 of the exception is stored, if applicable.
11262 Return zero if the address could not be computed, or if not relevant. */
11265 ada_exception_name_addr_1 (enum exception_catchpoint_kind ex,
11266 struct breakpoint *b)
11268 struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ());
11272 case ex_catch_exception:
11273 return (parse_and_eval_address ("e.full_name"));
11276 case ex_catch_exception_unhandled:
11277 return data->exception_info->unhandled_exception_name_addr ();
11280 case ex_catch_assert:
11281 return 0; /* Exception name is not relevant in this case. */
11285 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
11289 return 0; /* Should never be reached. */
11292 /* Same as ada_exception_name_addr_1, except that it intercepts and contains
11293 any error that ada_exception_name_addr_1 might cause to be thrown.
11294 When an error is intercepted, a warning with the error message is printed,
11295 and zero is returned. */
11298 ada_exception_name_addr (enum exception_catchpoint_kind ex,
11299 struct breakpoint *b)
11301 volatile struct gdb_exception e;
11302 CORE_ADDR result = 0;
11304 TRY_CATCH (e, RETURN_MASK_ERROR)
11306 result = ada_exception_name_addr_1 (ex, b);
11311 warning (_("failed to get exception name: %s"), e.message);
11318 static struct symtab_and_line ada_exception_sal (enum exception_catchpoint_kind,
11320 const struct breakpoint_ops **);
11321 static char *ada_exception_catchpoint_cond_string (const char *excep_string);
11323 /* Ada catchpoints.
11325 In the case of catchpoints on Ada exceptions, the catchpoint will
11326 stop the target on every exception the program throws. When a user
11327 specifies the name of a specific exception, we translate this
11328 request into a condition expression (in text form), and then parse
11329 it into an expression stored in each of the catchpoint's locations.
11330 We then use this condition to check whether the exception that was
11331 raised is the one the user is interested in. If not, then the
11332 target is resumed again. We store the name of the requested
11333 exception, in order to be able to re-set the condition expression
11334 when symbols change. */
11336 /* An instance of this type is used to represent an Ada catchpoint
11337 breakpoint location. It includes a "struct bp_location" as a kind
11338 of base class; users downcast to "struct bp_location *" when
11341 struct ada_catchpoint_location
11343 /* The base class. */
11344 struct bp_location base;
11346 /* The condition that checks whether the exception that was raised
11347 is the specific exception the user specified on catchpoint
11349 struct expression *excep_cond_expr;
11352 /* Implement the DTOR method in the bp_location_ops structure for all
11353 Ada exception catchpoint kinds. */
11356 ada_catchpoint_location_dtor (struct bp_location *bl)
11358 struct ada_catchpoint_location *al = (struct ada_catchpoint_location *) bl;
11360 xfree (al->excep_cond_expr);
11363 /* The vtable to be used in Ada catchpoint locations. */
11365 static const struct bp_location_ops ada_catchpoint_location_ops =
11367 ada_catchpoint_location_dtor
11370 /* An instance of this type is used to represent an Ada catchpoint.
11371 It includes a "struct breakpoint" as a kind of base class; users
11372 downcast to "struct breakpoint *" when needed. */
11374 struct ada_catchpoint
11376 /* The base class. */
11377 struct breakpoint base;
11379 /* The name of the specific exception the user specified. */
11380 char *excep_string;
11383 /* Parse the exception condition string in the context of each of the
11384 catchpoint's locations, and store them for later evaluation. */
11387 create_excep_cond_exprs (struct ada_catchpoint *c)
11389 struct cleanup *old_chain;
11390 struct bp_location *bl;
11393 /* Nothing to do if there's no specific exception to catch. */
11394 if (c->excep_string == NULL)
11397 /* Same if there are no locations... */
11398 if (c->base.loc == NULL)
11401 /* Compute the condition expression in text form, from the specific
11402 expection we want to catch. */
11403 cond_string = ada_exception_catchpoint_cond_string (c->excep_string);
11404 old_chain = make_cleanup (xfree, cond_string);
11406 /* Iterate over all the catchpoint's locations, and parse an
11407 expression for each. */
11408 for (bl = c->base.loc; bl != NULL; bl = bl->next)
11410 struct ada_catchpoint_location *ada_loc
11411 = (struct ada_catchpoint_location *) bl;
11412 struct expression *exp = NULL;
11414 if (!bl->shlib_disabled)
11416 volatile struct gdb_exception e;
11420 TRY_CATCH (e, RETURN_MASK_ERROR)
11422 exp = parse_exp_1 (&s, bl->address,
11423 block_for_pc (bl->address), 0);
11426 warning (_("failed to reevaluate internal exception condition "
11427 "for catchpoint %d: %s"),
11428 c->base.number, e.message);
11431 ada_loc->excep_cond_expr = exp;
11434 do_cleanups (old_chain);
11437 /* Implement the DTOR method in the breakpoint_ops structure for all
11438 exception catchpoint kinds. */
11441 dtor_exception (enum exception_catchpoint_kind ex, struct breakpoint *b)
11443 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
11445 xfree (c->excep_string);
11447 bkpt_breakpoint_ops.dtor (b);
11450 /* Implement the ALLOCATE_LOCATION method in the breakpoint_ops
11451 structure for all exception catchpoint kinds. */
11453 static struct bp_location *
11454 allocate_location_exception (enum exception_catchpoint_kind ex,
11455 struct breakpoint *self)
11457 struct ada_catchpoint_location *loc;
11459 loc = XNEW (struct ada_catchpoint_location);
11460 init_bp_location (&loc->base, &ada_catchpoint_location_ops, self);
11461 loc->excep_cond_expr = NULL;
11465 /* Implement the RE_SET method in the breakpoint_ops structure for all
11466 exception catchpoint kinds. */
11469 re_set_exception (enum exception_catchpoint_kind ex, struct breakpoint *b)
11471 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
11473 /* Call the base class's method. This updates the catchpoint's
11475 bkpt_breakpoint_ops.re_set (b);
11477 /* Reparse the exception conditional expressions. One for each
11479 create_excep_cond_exprs (c);
11482 /* Returns true if we should stop for this breakpoint hit. If the
11483 user specified a specific exception, we only want to cause a stop
11484 if the program thrown that exception. */
11487 should_stop_exception (const struct bp_location *bl)
11489 struct ada_catchpoint *c = (struct ada_catchpoint *) bl->owner;
11490 const struct ada_catchpoint_location *ada_loc
11491 = (const struct ada_catchpoint_location *) bl;
11492 volatile struct gdb_exception ex;
11495 /* With no specific exception, should always stop. */
11496 if (c->excep_string == NULL)
11499 if (ada_loc->excep_cond_expr == NULL)
11501 /* We will have a NULL expression if back when we were creating
11502 the expressions, this location's had failed to parse. */
11507 TRY_CATCH (ex, RETURN_MASK_ALL)
11509 struct value *mark;
11511 mark = value_mark ();
11512 stop = value_true (evaluate_expression (ada_loc->excep_cond_expr));
11513 value_free_to_mark (mark);
11516 exception_fprintf (gdb_stderr, ex,
11517 _("Error in testing exception condition:\n"));
11521 /* Implement the CHECK_STATUS method in the breakpoint_ops structure
11522 for all exception catchpoint kinds. */
11525 check_status_exception (enum exception_catchpoint_kind ex, bpstat bs)
11527 bs->stop = should_stop_exception (bs->bp_location_at);
11530 /* Implement the PRINT_IT method in the breakpoint_ops structure
11531 for all exception catchpoint kinds. */
11533 static enum print_stop_action
11534 print_it_exception (enum exception_catchpoint_kind ex, bpstat bs)
11536 struct ui_out *uiout = current_uiout;
11537 struct breakpoint *b = bs->breakpoint_at;
11539 annotate_catchpoint (b->number);
11541 if (ui_out_is_mi_like_p (uiout))
11543 ui_out_field_string (uiout, "reason",
11544 async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT));
11545 ui_out_field_string (uiout, "disp", bpdisp_text (b->disposition));
11548 ui_out_text (uiout,
11549 b->disposition == disp_del ? "\nTemporary catchpoint "
11550 : "\nCatchpoint ");
11551 ui_out_field_int (uiout, "bkptno", b->number);
11552 ui_out_text (uiout, ", ");
11556 case ex_catch_exception:
11557 case ex_catch_exception_unhandled:
11559 const CORE_ADDR addr = ada_exception_name_addr (ex, b);
11560 char exception_name[256];
11564 read_memory (addr, (gdb_byte *) exception_name,
11565 sizeof (exception_name) - 1);
11566 exception_name [sizeof (exception_name) - 1] = '\0';
11570 /* For some reason, we were unable to read the exception
11571 name. This could happen if the Runtime was compiled
11572 without debugging info, for instance. In that case,
11573 just replace the exception name by the generic string
11574 "exception" - it will read as "an exception" in the
11575 notification we are about to print. */
11576 memcpy (exception_name, "exception", sizeof ("exception"));
11578 /* In the case of unhandled exception breakpoints, we print
11579 the exception name as "unhandled EXCEPTION_NAME", to make
11580 it clearer to the user which kind of catchpoint just got
11581 hit. We used ui_out_text to make sure that this extra
11582 info does not pollute the exception name in the MI case. */
11583 if (ex == ex_catch_exception_unhandled)
11584 ui_out_text (uiout, "unhandled ");
11585 ui_out_field_string (uiout, "exception-name", exception_name);
11588 case ex_catch_assert:
11589 /* In this case, the name of the exception is not really
11590 important. Just print "failed assertion" to make it clearer
11591 that his program just hit an assertion-failure catchpoint.
11592 We used ui_out_text because this info does not belong in
11594 ui_out_text (uiout, "failed assertion");
11597 ui_out_text (uiout, " at ");
11598 ada_find_printable_frame (get_current_frame ());
11600 return PRINT_SRC_AND_LOC;
11603 /* Implement the PRINT_ONE method in the breakpoint_ops structure
11604 for all exception catchpoint kinds. */
11607 print_one_exception (enum exception_catchpoint_kind ex,
11608 struct breakpoint *b, struct bp_location **last_loc)
11610 struct ui_out *uiout = current_uiout;
11611 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
11612 struct value_print_options opts;
11614 get_user_print_options (&opts);
11615 if (opts.addressprint)
11617 annotate_field (4);
11618 ui_out_field_core_addr (uiout, "addr", b->loc->gdbarch, b->loc->address);
11621 annotate_field (5);
11622 *last_loc = b->loc;
11625 case ex_catch_exception:
11626 if (c->excep_string != NULL)
11628 char *msg = xstrprintf (_("`%s' Ada exception"), c->excep_string);
11630 ui_out_field_string (uiout, "what", msg);
11634 ui_out_field_string (uiout, "what", "all Ada exceptions");
11638 case ex_catch_exception_unhandled:
11639 ui_out_field_string (uiout, "what", "unhandled Ada exceptions");
11642 case ex_catch_assert:
11643 ui_out_field_string (uiout, "what", "failed Ada assertions");
11647 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
11652 /* Implement the PRINT_MENTION method in the breakpoint_ops structure
11653 for all exception catchpoint kinds. */
11656 print_mention_exception (enum exception_catchpoint_kind ex,
11657 struct breakpoint *b)
11659 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
11660 struct ui_out *uiout = current_uiout;
11662 ui_out_text (uiout, b->disposition == disp_del ? _("Temporary catchpoint ")
11663 : _("Catchpoint "));
11664 ui_out_field_int (uiout, "bkptno", b->number);
11665 ui_out_text (uiout, ": ");
11669 case ex_catch_exception:
11670 if (c->excep_string != NULL)
11672 char *info = xstrprintf (_("`%s' Ada exception"), c->excep_string);
11673 struct cleanup *old_chain = make_cleanup (xfree, info);
11675 ui_out_text (uiout, info);
11676 do_cleanups (old_chain);
11679 ui_out_text (uiout, _("all Ada exceptions"));
11682 case ex_catch_exception_unhandled:
11683 ui_out_text (uiout, _("unhandled Ada exceptions"));
11686 case ex_catch_assert:
11687 ui_out_text (uiout, _("failed Ada assertions"));
11691 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
11696 /* Implement the PRINT_RECREATE method in the breakpoint_ops structure
11697 for all exception catchpoint kinds. */
11700 print_recreate_exception (enum exception_catchpoint_kind ex,
11701 struct breakpoint *b, struct ui_file *fp)
11703 struct ada_catchpoint *c = (struct ada_catchpoint *) b;
11707 case ex_catch_exception:
11708 fprintf_filtered (fp, "catch exception");
11709 if (c->excep_string != NULL)
11710 fprintf_filtered (fp, " %s", c->excep_string);
11713 case ex_catch_exception_unhandled:
11714 fprintf_filtered (fp, "catch exception unhandled");
11717 case ex_catch_assert:
11718 fprintf_filtered (fp, "catch assert");
11722 internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
11724 print_recreate_thread (b, fp);
11727 /* Virtual table for "catch exception" breakpoints. */
11730 dtor_catch_exception (struct breakpoint *b)
11732 dtor_exception (ex_catch_exception, b);
11735 static struct bp_location *
11736 allocate_location_catch_exception (struct breakpoint *self)
11738 return allocate_location_exception (ex_catch_exception, self);
11742 re_set_catch_exception (struct breakpoint *b)
11744 re_set_exception (ex_catch_exception, b);
11748 check_status_catch_exception (bpstat bs)
11750 check_status_exception (ex_catch_exception, bs);
11753 static enum print_stop_action
11754 print_it_catch_exception (bpstat bs)
11756 return print_it_exception (ex_catch_exception, bs);
11760 print_one_catch_exception (struct breakpoint *b, struct bp_location **last_loc)
11762 print_one_exception (ex_catch_exception, b, last_loc);
11766 print_mention_catch_exception (struct breakpoint *b)
11768 print_mention_exception (ex_catch_exception, b);
11772 print_recreate_catch_exception (struct breakpoint *b, struct ui_file *fp)
11774 print_recreate_exception (ex_catch_exception, b, fp);
11777 static struct breakpoint_ops catch_exception_breakpoint_ops;
11779 /* Virtual table for "catch exception unhandled" breakpoints. */
11782 dtor_catch_exception_unhandled (struct breakpoint *b)
11784 dtor_exception (ex_catch_exception_unhandled, b);
11787 static struct bp_location *
11788 allocate_location_catch_exception_unhandled (struct breakpoint *self)
11790 return allocate_location_exception (ex_catch_exception_unhandled, self);
11794 re_set_catch_exception_unhandled (struct breakpoint *b)
11796 re_set_exception (ex_catch_exception_unhandled, b);
11800 check_status_catch_exception_unhandled (bpstat bs)
11802 check_status_exception (ex_catch_exception_unhandled, bs);
11805 static enum print_stop_action
11806 print_it_catch_exception_unhandled (bpstat bs)
11808 return print_it_exception (ex_catch_exception_unhandled, bs);
11812 print_one_catch_exception_unhandled (struct breakpoint *b,
11813 struct bp_location **last_loc)
11815 print_one_exception (ex_catch_exception_unhandled, b, last_loc);
11819 print_mention_catch_exception_unhandled (struct breakpoint *b)
11821 print_mention_exception (ex_catch_exception_unhandled, b);
11825 print_recreate_catch_exception_unhandled (struct breakpoint *b,
11826 struct ui_file *fp)
11828 print_recreate_exception (ex_catch_exception_unhandled, b, fp);
11831 static struct breakpoint_ops catch_exception_unhandled_breakpoint_ops;
11833 /* Virtual table for "catch assert" breakpoints. */
11836 dtor_catch_assert (struct breakpoint *b)
11838 dtor_exception (ex_catch_assert, b);
11841 static struct bp_location *
11842 allocate_location_catch_assert (struct breakpoint *self)
11844 return allocate_location_exception (ex_catch_assert, self);
11848 re_set_catch_assert (struct breakpoint *b)
11850 re_set_exception (ex_catch_assert, b);
11854 check_status_catch_assert (bpstat bs)
11856 check_status_exception (ex_catch_assert, bs);
11859 static enum print_stop_action
11860 print_it_catch_assert (bpstat bs)
11862 return print_it_exception (ex_catch_assert, bs);
11866 print_one_catch_assert (struct breakpoint *b, struct bp_location **last_loc)
11868 print_one_exception (ex_catch_assert, b, last_loc);
11872 print_mention_catch_assert (struct breakpoint *b)
11874 print_mention_exception (ex_catch_assert, b);
11878 print_recreate_catch_assert (struct breakpoint *b, struct ui_file *fp)
11880 print_recreate_exception (ex_catch_assert, b, fp);
11883 static struct breakpoint_ops catch_assert_breakpoint_ops;
11885 /* Return a newly allocated copy of the first space-separated token
11886 in ARGSP, and then adjust ARGSP to point immediately after that
11889 Return NULL if ARGPS does not contain any more tokens. */
11892 ada_get_next_arg (char **argsp)
11894 char *args = *argsp;
11898 args = skip_spaces (args);
11899 if (args[0] == '\0')
11900 return NULL; /* No more arguments. */
11902 /* Find the end of the current argument. */
11904 end = skip_to_space (args);
11906 /* Adjust ARGSP to point to the start of the next argument. */
11910 /* Make a copy of the current argument and return it. */
11912 result = xmalloc (end - args + 1);
11913 strncpy (result, args, end - args);
11914 result[end - args] = '\0';
11919 /* Split the arguments specified in a "catch exception" command.
11920 Set EX to the appropriate catchpoint type.
11921 Set EXCEP_STRING to the name of the specific exception if
11922 specified by the user.
11923 If a condition is found at the end of the arguments, the condition
11924 expression is stored in COND_STRING (memory must be deallocated
11925 after use). Otherwise COND_STRING is set to NULL. */
11928 catch_ada_exception_command_split (char *args,
11929 enum exception_catchpoint_kind *ex,
11930 char **excep_string,
11931 char **cond_string)
11933 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
11934 char *exception_name;
11937 exception_name = ada_get_next_arg (&args);
11938 if (exception_name != NULL && strcmp (exception_name, "if") == 0)
11940 /* This is not an exception name; this is the start of a condition
11941 expression for a catchpoint on all exceptions. So, "un-get"
11942 this token, and set exception_name to NULL. */
11943 xfree (exception_name);
11944 exception_name = NULL;
11947 make_cleanup (xfree, exception_name);
11949 /* Check to see if we have a condition. */
11951 args = skip_spaces (args);
11952 if (strncmp (args, "if", 2) == 0
11953 && (isspace (args[2]) || args[2] == '\0'))
11956 args = skip_spaces (args);
11958 if (args[0] == '\0')
11959 error (_("Condition missing after `if' keyword"));
11960 cond = xstrdup (args);
11961 make_cleanup (xfree, cond);
11963 args += strlen (args);
11966 /* Check that we do not have any more arguments. Anything else
11969 if (args[0] != '\0')
11970 error (_("Junk at end of expression"));
11972 discard_cleanups (old_chain);
11974 if (exception_name == NULL)
11976 /* Catch all exceptions. */
11977 *ex = ex_catch_exception;
11978 *excep_string = NULL;
11980 else if (strcmp (exception_name, "unhandled") == 0)
11982 /* Catch unhandled exceptions. */
11983 *ex = ex_catch_exception_unhandled;
11984 *excep_string = NULL;
11988 /* Catch a specific exception. */
11989 *ex = ex_catch_exception;
11990 *excep_string = exception_name;
11992 *cond_string = cond;
11995 /* Return the name of the symbol on which we should break in order to
11996 implement a catchpoint of the EX kind. */
11998 static const char *
11999 ada_exception_sym_name (enum exception_catchpoint_kind ex)
12001 struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ());
12003 gdb_assert (data->exception_info != NULL);
12007 case ex_catch_exception:
12008 return (data->exception_info->catch_exception_sym);
12010 case ex_catch_exception_unhandled:
12011 return (data->exception_info->catch_exception_unhandled_sym);
12013 case ex_catch_assert:
12014 return (data->exception_info->catch_assert_sym);
12017 internal_error (__FILE__, __LINE__,
12018 _("unexpected catchpoint kind (%d)"), ex);
12022 /* Return the breakpoint ops "virtual table" used for catchpoints
12025 static const struct breakpoint_ops *
12026 ada_exception_breakpoint_ops (enum exception_catchpoint_kind ex)
12030 case ex_catch_exception:
12031 return (&catch_exception_breakpoint_ops);
12033 case ex_catch_exception_unhandled:
12034 return (&catch_exception_unhandled_breakpoint_ops);
12036 case ex_catch_assert:
12037 return (&catch_assert_breakpoint_ops);
12040 internal_error (__FILE__, __LINE__,
12041 _("unexpected catchpoint kind (%d)"), ex);
12045 /* Return the condition that will be used to match the current exception
12046 being raised with the exception that the user wants to catch. This
12047 assumes that this condition is used when the inferior just triggered
12048 an exception catchpoint.
12050 The string returned is a newly allocated string that needs to be
12051 deallocated later. */
12054 ada_exception_catchpoint_cond_string (const char *excep_string)
12058 /* The standard exceptions are a special case. They are defined in
12059 runtime units that have been compiled without debugging info; if
12060 EXCEP_STRING is the not-fully-qualified name of a standard
12061 exception (e.g. "constraint_error") then, during the evaluation
12062 of the condition expression, the symbol lookup on this name would
12063 *not* return this standard exception. The catchpoint condition
12064 may then be set only on user-defined exceptions which have the
12065 same not-fully-qualified name (e.g. my_package.constraint_error).
12067 To avoid this unexcepted behavior, these standard exceptions are
12068 systematically prefixed by "standard". This means that "catch
12069 exception constraint_error" is rewritten into "catch exception
12070 standard.constraint_error".
12072 If an exception named contraint_error is defined in another package of
12073 the inferior program, then the only way to specify this exception as a
12074 breakpoint condition is to use its fully-qualified named:
12075 e.g. my_package.constraint_error. */
12077 for (i = 0; i < sizeof (standard_exc) / sizeof (char *); i++)
12079 if (strcmp (standard_exc [i], excep_string) == 0)
12081 return xstrprintf ("long_integer (e) = long_integer (&standard.%s)",
12085 return xstrprintf ("long_integer (e) = long_integer (&%s)", excep_string);
12088 /* Return the symtab_and_line that should be used to insert an exception
12089 catchpoint of the TYPE kind.
12091 EXCEP_STRING should contain the name of a specific exception that
12092 the catchpoint should catch, or NULL otherwise.
12094 ADDR_STRING returns the name of the function where the real
12095 breakpoint that implements the catchpoints is set, depending on the
12096 type of catchpoint we need to create. */
12098 static struct symtab_and_line
12099 ada_exception_sal (enum exception_catchpoint_kind ex, char *excep_string,
12100 char **addr_string, const struct breakpoint_ops **ops)
12102 const char *sym_name;
12103 struct symbol *sym;
12105 /* First, find out which exception support info to use. */
12106 ada_exception_support_info_sniffer ();
12108 /* Then lookup the function on which we will break in order to catch
12109 the Ada exceptions requested by the user. */
12110 sym_name = ada_exception_sym_name (ex);
12111 sym = standard_lookup (sym_name, NULL, VAR_DOMAIN);
12113 /* We can assume that SYM is not NULL at this stage. If the symbol
12114 did not exist, ada_exception_support_info_sniffer would have
12115 raised an exception.
12117 Also, ada_exception_support_info_sniffer should have already
12118 verified that SYM is a function symbol. */
12119 gdb_assert (sym != NULL);
12120 gdb_assert (SYMBOL_CLASS (sym) == LOC_BLOCK);
12122 /* Set ADDR_STRING. */
12123 *addr_string = xstrdup (sym_name);
12126 *ops = ada_exception_breakpoint_ops (ex);
12128 return find_function_start_sal (sym, 1);
12131 /* Parse the arguments (ARGS) of the "catch exception" command.
12133 If the user asked the catchpoint to catch only a specific
12134 exception, then save the exception name in ADDR_STRING.
12136 If the user provided a condition, then set COND_STRING to
12137 that condition expression (the memory must be deallocated
12138 after use). Otherwise, set COND_STRING to NULL.
12140 See ada_exception_sal for a description of all the remaining
12141 function arguments of this function. */
12143 static struct symtab_and_line
12144 ada_decode_exception_location (char *args, char **addr_string,
12145 char **excep_string,
12146 char **cond_string,
12147 const struct breakpoint_ops **ops)
12149 enum exception_catchpoint_kind ex;
12151 catch_ada_exception_command_split (args, &ex, excep_string, cond_string);
12152 return ada_exception_sal (ex, *excep_string, addr_string, ops);
12155 /* Create an Ada exception catchpoint. */
12158 create_ada_exception_catchpoint (struct gdbarch *gdbarch,
12159 struct symtab_and_line sal,
12161 char *excep_string,
12163 const struct breakpoint_ops *ops,
12167 struct ada_catchpoint *c;
12169 c = XNEW (struct ada_catchpoint);
12170 init_ada_exception_breakpoint (&c->base, gdbarch, sal, addr_string,
12171 ops, tempflag, from_tty);
12172 c->excep_string = excep_string;
12173 create_excep_cond_exprs (c);
12174 if (cond_string != NULL)
12175 set_breakpoint_condition (&c->base, cond_string, from_tty);
12176 install_breakpoint (0, &c->base, 1);
12179 /* Implement the "catch exception" command. */
12182 catch_ada_exception_command (char *arg, int from_tty,
12183 struct cmd_list_element *command)
12185 struct gdbarch *gdbarch = get_current_arch ();
12187 struct symtab_and_line sal;
12188 char *addr_string = NULL;
12189 char *excep_string = NULL;
12190 char *cond_string = NULL;
12191 const struct breakpoint_ops *ops = NULL;
12193 tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
12197 sal = ada_decode_exception_location (arg, &addr_string, &excep_string,
12198 &cond_string, &ops);
12199 create_ada_exception_catchpoint (gdbarch, sal, addr_string,
12200 excep_string, cond_string, ops,
12201 tempflag, from_tty);
12204 /* Assuming that ARGS contains the arguments of a "catch assert"
12205 command, parse those arguments and return a symtab_and_line object
12206 for a failed assertion catchpoint.
12208 Set ADDR_STRING to the name of the function where the real
12209 breakpoint that implements the catchpoint is set.
12211 If ARGS contains a condition, set COND_STRING to that condition
12212 (the memory needs to be deallocated after use). Otherwise, set
12213 COND_STRING to NULL. */
12215 static struct symtab_and_line
12216 ada_decode_assert_location (char *args, char **addr_string,
12217 char **cond_string,
12218 const struct breakpoint_ops **ops)
12220 args = skip_spaces (args);
12222 /* Check whether a condition was provided. */
12223 if (strncmp (args, "if", 2) == 0
12224 && (isspace (args[2]) || args[2] == '\0'))
12227 args = skip_spaces (args);
12228 if (args[0] == '\0')
12229 error (_("condition missing after `if' keyword"));
12230 *cond_string = xstrdup (args);
12233 /* Otherwise, there should be no other argument at the end of
12235 else if (args[0] != '\0')
12236 error (_("Junk at end of arguments."));
12238 return ada_exception_sal (ex_catch_assert, NULL, addr_string, ops);
12241 /* Implement the "catch assert" command. */
12244 catch_assert_command (char *arg, int from_tty,
12245 struct cmd_list_element *command)
12247 struct gdbarch *gdbarch = get_current_arch ();
12249 struct symtab_and_line sal;
12250 char *addr_string = NULL;
12251 char *cond_string = NULL;
12252 const struct breakpoint_ops *ops = NULL;
12254 tempflag = get_cmd_context (command) == CATCH_TEMPORARY;
12258 sal = ada_decode_assert_location (arg, &addr_string, &cond_string, &ops);
12259 create_ada_exception_catchpoint (gdbarch, sal, addr_string,
12260 NULL, cond_string, ops, tempflag,
12264 /* Information about operators given special treatment in functions
12266 /* Format: OP_DEFN (<operator>, <operator length>, <# args>, <binop>). */
12268 #define ADA_OPERATORS \
12269 OP_DEFN (OP_VAR_VALUE, 4, 0, 0) \
12270 OP_DEFN (BINOP_IN_BOUNDS, 3, 2, 0) \
12271 OP_DEFN (TERNOP_IN_RANGE, 1, 3, 0) \
12272 OP_DEFN (OP_ATR_FIRST, 1, 2, 0) \
12273 OP_DEFN (OP_ATR_LAST, 1, 2, 0) \
12274 OP_DEFN (OP_ATR_LENGTH, 1, 2, 0) \
12275 OP_DEFN (OP_ATR_IMAGE, 1, 2, 0) \
12276 OP_DEFN (OP_ATR_MAX, 1, 3, 0) \
12277 OP_DEFN (OP_ATR_MIN, 1, 3, 0) \
12278 OP_DEFN (OP_ATR_MODULUS, 1, 1, 0) \
12279 OP_DEFN (OP_ATR_POS, 1, 2, 0) \
12280 OP_DEFN (OP_ATR_SIZE, 1, 1, 0) \
12281 OP_DEFN (OP_ATR_TAG, 1, 1, 0) \
12282 OP_DEFN (OP_ATR_VAL, 1, 2, 0) \
12283 OP_DEFN (UNOP_QUAL, 3, 1, 0) \
12284 OP_DEFN (UNOP_IN_RANGE, 3, 1, 0) \
12285 OP_DEFN (OP_OTHERS, 1, 1, 0) \
12286 OP_DEFN (OP_POSITIONAL, 3, 1, 0) \
12287 OP_DEFN (OP_DISCRETE_RANGE, 1, 2, 0)
12290 ada_operator_length (const struct expression *exp, int pc, int *oplenp,
12293 switch (exp->elts[pc - 1].opcode)
12296 operator_length_standard (exp, pc, oplenp, argsp);
12299 #define OP_DEFN(op, len, args, binop) \
12300 case op: *oplenp = len; *argsp = args; break;
12306 *argsp = longest_to_int (exp->elts[pc - 2].longconst);
12311 *argsp = longest_to_int (exp->elts[pc - 2].longconst) + 1;
12316 /* Implementation of the exp_descriptor method operator_check. */
12319 ada_operator_check (struct expression *exp, int pos,
12320 int (*objfile_func) (struct objfile *objfile, void *data),
12323 const union exp_element *const elts = exp->elts;
12324 struct type *type = NULL;
12326 switch (elts[pos].opcode)
12328 case UNOP_IN_RANGE:
12330 type = elts[pos + 1].type;
12334 return operator_check_standard (exp, pos, objfile_func, data);
12337 /* Invoke callbacks for TYPE and OBJFILE if they were set as non-NULL. */
12339 if (type && TYPE_OBJFILE (type)
12340 && (*objfile_func) (TYPE_OBJFILE (type), data))
12347 ada_op_name (enum exp_opcode opcode)
12352 return op_name_standard (opcode);
12354 #define OP_DEFN(op, len, args, binop) case op: return #op;
12359 return "OP_AGGREGATE";
12361 return "OP_CHOICES";
12367 /* As for operator_length, but assumes PC is pointing at the first
12368 element of the operator, and gives meaningful results only for the
12369 Ada-specific operators, returning 0 for *OPLENP and *ARGSP otherwise. */
12372 ada_forward_operator_length (struct expression *exp, int pc,
12373 int *oplenp, int *argsp)
12375 switch (exp->elts[pc].opcode)
12378 *oplenp = *argsp = 0;
12381 #define OP_DEFN(op, len, args, binop) \
12382 case op: *oplenp = len; *argsp = args; break;
12388 *argsp = longest_to_int (exp->elts[pc + 1].longconst);
12393 *argsp = longest_to_int (exp->elts[pc + 1].longconst) + 1;
12399 int len = longest_to_int (exp->elts[pc + 1].longconst);
12401 *oplenp = 4 + BYTES_TO_EXP_ELEM (len + 1);
12409 ada_dump_subexp_body (struct expression *exp, struct ui_file *stream, int elt)
12411 enum exp_opcode op = exp->elts[elt].opcode;
12416 ada_forward_operator_length (exp, elt, &oplen, &nargs);
12420 /* Ada attributes ('Foo). */
12423 case OP_ATR_LENGTH:
12427 case OP_ATR_MODULUS:
12434 case UNOP_IN_RANGE:
12436 /* XXX: gdb_sprint_host_address, type_sprint */
12437 fprintf_filtered (stream, _("Type @"));
12438 gdb_print_host_address (exp->elts[pc + 1].type, stream);
12439 fprintf_filtered (stream, " (");
12440 type_print (exp->elts[pc + 1].type, NULL, stream, 0);
12441 fprintf_filtered (stream, ")");
12443 case BINOP_IN_BOUNDS:
12444 fprintf_filtered (stream, " (%d)",
12445 longest_to_int (exp->elts[pc + 2].longconst));
12447 case TERNOP_IN_RANGE:
12452 case OP_DISCRETE_RANGE:
12453 case OP_POSITIONAL:
12460 char *name = &exp->elts[elt + 2].string;
12461 int len = longest_to_int (exp->elts[elt + 1].longconst);
12463 fprintf_filtered (stream, "Text: `%.*s'", len, name);
12468 return dump_subexp_body_standard (exp, stream, elt);
12472 for (i = 0; i < nargs; i += 1)
12473 elt = dump_subexp (exp, stream, elt);
12478 /* The Ada extension of print_subexp (q.v.). */
12481 ada_print_subexp (struct expression *exp, int *pos,
12482 struct ui_file *stream, enum precedence prec)
12484 int oplen, nargs, i;
12486 enum exp_opcode op = exp->elts[pc].opcode;
12488 ada_forward_operator_length (exp, pc, &oplen, &nargs);
12495 print_subexp_standard (exp, pos, stream, prec);
12499 fputs_filtered (SYMBOL_NATURAL_NAME (exp->elts[pc + 2].symbol), stream);
12502 case BINOP_IN_BOUNDS:
12503 /* XXX: sprint_subexp */
12504 print_subexp (exp, pos, stream, PREC_SUFFIX);
12505 fputs_filtered (" in ", stream);
12506 print_subexp (exp, pos, stream, PREC_SUFFIX);
12507 fputs_filtered ("'range", stream);
12508 if (exp->elts[pc + 1].longconst > 1)
12509 fprintf_filtered (stream, "(%ld)",
12510 (long) exp->elts[pc + 1].longconst);
12513 case TERNOP_IN_RANGE:
12514 if (prec >= PREC_EQUAL)
12515 fputs_filtered ("(", stream);
12516 /* XXX: sprint_subexp */
12517 print_subexp (exp, pos, stream, PREC_SUFFIX);
12518 fputs_filtered (" in ", stream);
12519 print_subexp (exp, pos, stream, PREC_EQUAL);
12520 fputs_filtered (" .. ", stream);
12521 print_subexp (exp, pos, stream, PREC_EQUAL);
12522 if (prec >= PREC_EQUAL)
12523 fputs_filtered (")", stream);
12528 case OP_ATR_LENGTH:
12532 case OP_ATR_MODULUS:
12537 if (exp->elts[*pos].opcode == OP_TYPE)
12539 if (TYPE_CODE (exp->elts[*pos + 1].type) != TYPE_CODE_VOID)
12540 LA_PRINT_TYPE (exp->elts[*pos + 1].type, "", stream, 0, 0,
12541 &type_print_raw_options);
12545 print_subexp (exp, pos, stream, PREC_SUFFIX);
12546 fprintf_filtered (stream, "'%s", ada_attribute_name (op));
12551 for (tem = 1; tem < nargs; tem += 1)
12553 fputs_filtered ((tem == 1) ? " (" : ", ", stream);
12554 print_subexp (exp, pos, stream, PREC_ABOVE_COMMA);
12556 fputs_filtered (")", stream);
12561 type_print (exp->elts[pc + 1].type, "", stream, 0);
12562 fputs_filtered ("'(", stream);
12563 print_subexp (exp, pos, stream, PREC_PREFIX);
12564 fputs_filtered (")", stream);
12567 case UNOP_IN_RANGE:
12568 /* XXX: sprint_subexp */
12569 print_subexp (exp, pos, stream, PREC_SUFFIX);
12570 fputs_filtered (" in ", stream);
12571 LA_PRINT_TYPE (exp->elts[pc + 1].type, "", stream, 1, 0,
12572 &type_print_raw_options);
12575 case OP_DISCRETE_RANGE:
12576 print_subexp (exp, pos, stream, PREC_SUFFIX);
12577 fputs_filtered ("..", stream);
12578 print_subexp (exp, pos, stream, PREC_SUFFIX);
12582 fputs_filtered ("others => ", stream);
12583 print_subexp (exp, pos, stream, PREC_SUFFIX);
12587 for (i = 0; i < nargs-1; i += 1)
12590 fputs_filtered ("|", stream);
12591 print_subexp (exp, pos, stream, PREC_SUFFIX);
12593 fputs_filtered (" => ", stream);
12594 print_subexp (exp, pos, stream, PREC_SUFFIX);
12597 case OP_POSITIONAL:
12598 print_subexp (exp, pos, stream, PREC_SUFFIX);
12602 fputs_filtered ("(", stream);
12603 for (i = 0; i < nargs; i += 1)
12606 fputs_filtered (", ", stream);
12607 print_subexp (exp, pos, stream, PREC_SUFFIX);
12609 fputs_filtered (")", stream);
12614 /* Table mapping opcodes into strings for printing operators
12615 and precedences of the operators. */
12617 static const struct op_print ada_op_print_tab[] = {
12618 {":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
12619 {"or else", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
12620 {"and then", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
12621 {"or", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
12622 {"xor", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
12623 {"and", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
12624 {"=", BINOP_EQUAL, PREC_EQUAL, 0},
12625 {"/=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
12626 {"<=", BINOP_LEQ, PREC_ORDER, 0},
12627 {">=", BINOP_GEQ, PREC_ORDER, 0},
12628 {">", BINOP_GTR, PREC_ORDER, 0},
12629 {"<", BINOP_LESS, PREC_ORDER, 0},
12630 {">>", BINOP_RSH, PREC_SHIFT, 0},
12631 {"<<", BINOP_LSH, PREC_SHIFT, 0},
12632 {"+", BINOP_ADD, PREC_ADD, 0},
12633 {"-", BINOP_SUB, PREC_ADD, 0},
12634 {"&", BINOP_CONCAT, PREC_ADD, 0},
12635 {"*", BINOP_MUL, PREC_MUL, 0},
12636 {"/", BINOP_DIV, PREC_MUL, 0},
12637 {"rem", BINOP_REM, PREC_MUL, 0},
12638 {"mod", BINOP_MOD, PREC_MUL, 0},
12639 {"**", BINOP_EXP, PREC_REPEAT, 0},
12640 {"@", BINOP_REPEAT, PREC_REPEAT, 0},
12641 {"-", UNOP_NEG, PREC_PREFIX, 0},
12642 {"+", UNOP_PLUS, PREC_PREFIX, 0},
12643 {"not ", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
12644 {"not ", UNOP_COMPLEMENT, PREC_PREFIX, 0},
12645 {"abs ", UNOP_ABS, PREC_PREFIX, 0},
12646 {".all", UNOP_IND, PREC_SUFFIX, 1},
12647 {"'access", UNOP_ADDR, PREC_SUFFIX, 1},
12648 {"'size", OP_ATR_SIZE, PREC_SUFFIX, 1},
12652 enum ada_primitive_types {
12653 ada_primitive_type_int,
12654 ada_primitive_type_long,
12655 ada_primitive_type_short,
12656 ada_primitive_type_char,
12657 ada_primitive_type_float,
12658 ada_primitive_type_double,
12659 ada_primitive_type_void,
12660 ada_primitive_type_long_long,
12661 ada_primitive_type_long_double,
12662 ada_primitive_type_natural,
12663 ada_primitive_type_positive,
12664 ada_primitive_type_system_address,
12665 nr_ada_primitive_types
12669 ada_language_arch_info (struct gdbarch *gdbarch,
12670 struct language_arch_info *lai)
12672 const struct builtin_type *builtin = builtin_type (gdbarch);
12674 lai->primitive_type_vector
12675 = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_ada_primitive_types + 1,
12678 lai->primitive_type_vector [ada_primitive_type_int]
12679 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
12681 lai->primitive_type_vector [ada_primitive_type_long]
12682 = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
12683 0, "long_integer");
12684 lai->primitive_type_vector [ada_primitive_type_short]
12685 = arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch),
12686 0, "short_integer");
12687 lai->string_char_type
12688 = lai->primitive_type_vector [ada_primitive_type_char]
12689 = arch_integer_type (gdbarch, TARGET_CHAR_BIT, 0, "character");
12690 lai->primitive_type_vector [ada_primitive_type_float]
12691 = arch_float_type (gdbarch, gdbarch_float_bit (gdbarch),
12693 lai->primitive_type_vector [ada_primitive_type_double]
12694 = arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
12695 "long_float", NULL);
12696 lai->primitive_type_vector [ada_primitive_type_long_long]
12697 = arch_integer_type (gdbarch, gdbarch_long_long_bit (gdbarch),
12698 0, "long_long_integer");
12699 lai->primitive_type_vector [ada_primitive_type_long_double]
12700 = arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
12701 "long_long_float", NULL);
12702 lai->primitive_type_vector [ada_primitive_type_natural]
12703 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
12705 lai->primitive_type_vector [ada_primitive_type_positive]
12706 = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
12708 lai->primitive_type_vector [ada_primitive_type_void]
12709 = builtin->builtin_void;
12711 lai->primitive_type_vector [ada_primitive_type_system_address]
12712 = lookup_pointer_type (arch_type (gdbarch, TYPE_CODE_VOID, 1, "void"));
12713 TYPE_NAME (lai->primitive_type_vector [ada_primitive_type_system_address])
12714 = "system__address";
12716 lai->bool_type_symbol = NULL;
12717 lai->bool_type_default = builtin->builtin_bool;
12720 /* Language vector */
12722 /* Not really used, but needed in the ada_language_defn. */
12725 emit_char (int c, struct type *type, struct ui_file *stream, int quoter)
12727 ada_emit_char (c, type, stream, quoter, 1);
12733 warnings_issued = 0;
12734 return ada_parse ();
12737 static const struct exp_descriptor ada_exp_descriptor = {
12739 ada_operator_length,
12740 ada_operator_check,
12742 ada_dump_subexp_body,
12743 ada_evaluate_subexp
12746 /* Implement the "la_get_symbol_name_cmp" language_defn method
12749 static symbol_name_cmp_ftype
12750 ada_get_symbol_name_cmp (const char *lookup_name)
12752 if (should_use_wild_match (lookup_name))
12755 return compare_names;
12758 /* Implement the "la_read_var_value" language_defn method for Ada. */
12760 static struct value *
12761 ada_read_var_value (struct symbol *var, struct frame_info *frame)
12763 struct block *frame_block = NULL;
12764 struct symbol *renaming_sym = NULL;
12766 /* The only case where default_read_var_value is not sufficient
12767 is when VAR is a renaming... */
12769 frame_block = get_frame_block (frame, NULL);
12771 renaming_sym = ada_find_renaming_symbol (var, frame_block);
12772 if (renaming_sym != NULL)
12773 return ada_read_renaming_var_value (renaming_sym, frame_block);
12775 /* This is a typical case where we expect the default_read_var_value
12776 function to work. */
12777 return default_read_var_value (var, frame);
12780 const struct language_defn ada_language_defn = {
12781 "ada", /* Language name */
12784 case_sensitive_on, /* Yes, Ada is case-insensitive, but
12785 that's not quite what this means. */
12787 macro_expansion_no,
12788 &ada_exp_descriptor,
12792 ada_printchar, /* Print a character constant */
12793 ada_printstr, /* Function to print string constant */
12794 emit_char, /* Function to print single char (not used) */
12795 ada_print_type, /* Print a type using appropriate syntax */
12796 ada_print_typedef, /* Print a typedef using appropriate syntax */
12797 ada_val_print, /* Print a value using appropriate syntax */
12798 ada_value_print, /* Print a top-level value */
12799 ada_read_var_value, /* la_read_var_value */
12800 NULL, /* Language specific skip_trampoline */
12801 NULL, /* name_of_this */
12802 ada_lookup_symbol_nonlocal, /* Looking up non-local symbols. */
12803 basic_lookup_transparent_type, /* lookup_transparent_type */
12804 ada_la_decode, /* Language specific symbol demangler */
12805 NULL, /* Language specific
12806 class_name_from_physname */
12807 ada_op_print_tab, /* expression operators for printing */
12808 0, /* c-style arrays */
12809 1, /* String lower bound */
12810 ada_get_gdb_completer_word_break_characters,
12811 ada_make_symbol_completion_list,
12812 ada_language_arch_info,
12813 ada_print_array_index,
12814 default_pass_by_reference,
12816 ada_get_symbol_name_cmp, /* la_get_symbol_name_cmp */
12817 ada_iterate_over_symbols,
12821 /* Provide a prototype to silence -Wmissing-prototypes. */
12822 extern initialize_file_ftype _initialize_ada_language;
12824 /* Command-list for the "set/show ada" prefix command. */
12825 static struct cmd_list_element *set_ada_list;
12826 static struct cmd_list_element *show_ada_list;
12828 /* Implement the "set ada" prefix command. */
12831 set_ada_command (char *arg, int from_tty)
12833 printf_unfiltered (_(\
12834 "\"set ada\" must be followed by the name of a setting.\n"));
12835 help_list (set_ada_list, "set ada ", -1, gdb_stdout);
12838 /* Implement the "show ada" prefix command. */
12841 show_ada_command (char *args, int from_tty)
12843 cmd_show_list (show_ada_list, from_tty, "");
12847 initialize_ada_catchpoint_ops (void)
12849 struct breakpoint_ops *ops;
12851 initialize_breakpoint_ops ();
12853 ops = &catch_exception_breakpoint_ops;
12854 *ops = bkpt_breakpoint_ops;
12855 ops->dtor = dtor_catch_exception;
12856 ops->allocate_location = allocate_location_catch_exception;
12857 ops->re_set = re_set_catch_exception;
12858 ops->check_status = check_status_catch_exception;
12859 ops->print_it = print_it_catch_exception;
12860 ops->print_one = print_one_catch_exception;
12861 ops->print_mention = print_mention_catch_exception;
12862 ops->print_recreate = print_recreate_catch_exception;
12864 ops = &catch_exception_unhandled_breakpoint_ops;
12865 *ops = bkpt_breakpoint_ops;
12866 ops->dtor = dtor_catch_exception_unhandled;
12867 ops->allocate_location = allocate_location_catch_exception_unhandled;
12868 ops->re_set = re_set_catch_exception_unhandled;
12869 ops->check_status = check_status_catch_exception_unhandled;
12870 ops->print_it = print_it_catch_exception_unhandled;
12871 ops->print_one = print_one_catch_exception_unhandled;
12872 ops->print_mention = print_mention_catch_exception_unhandled;
12873 ops->print_recreate = print_recreate_catch_exception_unhandled;
12875 ops = &catch_assert_breakpoint_ops;
12876 *ops = bkpt_breakpoint_ops;
12877 ops->dtor = dtor_catch_assert;
12878 ops->allocate_location = allocate_location_catch_assert;
12879 ops->re_set = re_set_catch_assert;
12880 ops->check_status = check_status_catch_assert;
12881 ops->print_it = print_it_catch_assert;
12882 ops->print_one = print_one_catch_assert;
12883 ops->print_mention = print_mention_catch_assert;
12884 ops->print_recreate = print_recreate_catch_assert;
12888 _initialize_ada_language (void)
12890 add_language (&ada_language_defn);
12892 initialize_ada_catchpoint_ops ();
12894 add_prefix_cmd ("ada", no_class, set_ada_command,
12895 _("Prefix command for changing Ada-specfic settings"),
12896 &set_ada_list, "set ada ", 0, &setlist);
12898 add_prefix_cmd ("ada", no_class, show_ada_command,
12899 _("Generic command for showing Ada-specific settings."),
12900 &show_ada_list, "show ada ", 0, &showlist);
12902 add_setshow_boolean_cmd ("trust-PAD-over-XVS", class_obscure,
12903 &trust_pad_over_xvs, _("\
12904 Enable or disable an optimization trusting PAD types over XVS types"), _("\
12905 Show whether an optimization trusting PAD types over XVS types is activated"),
12907 This is related to the encoding used by the GNAT compiler. The debugger\n\
12908 should normally trust the contents of PAD types, but certain older versions\n\
12909 of GNAT have a bug that sometimes causes the information in the PAD type\n\
12910 to be incorrect. Turning this setting \"off\" allows the debugger to\n\
12911 work around this bug. It is always safe to turn this option \"off\", but\n\
12912 this incurs a slight performance penalty, so it is recommended to NOT change\n\
12913 this option to \"off\" unless necessary."),
12914 NULL, NULL, &set_ada_list, &show_ada_list);
12916 add_catch_command ("exception", _("\
12917 Catch Ada exceptions, when raised.\n\
12918 With an argument, catch only exceptions with the given name."),
12919 catch_ada_exception_command,
12923 add_catch_command ("assert", _("\
12924 Catch failed Ada assertions, when raised.\n\
12925 With an argument, catch only exceptions with the given name."),
12926 catch_assert_command,
12931 varsize_limit = 65536;
12933 obstack_init (&symbol_list_obstack);
12935 decoded_names_store = htab_create_alloc
12936 (256, htab_hash_string, (int (*)(const void *, const void *)) streq,
12937 NULL, xcalloc, xfree);
12939 /* Setup per-inferior data. */
12940 observer_attach_inferior_exit (ada_inferior_exit);
12942 = register_inferior_data_with_cleanup (NULL, ada_inferior_data_cleanup);